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Line No. Rev Author Line
1 684 jeremybenn
2004-05-11  Diego Novillo  
2
 
3
        * tree-cfg.c (delete_tree_cfg): Update call to
4
        free_basic_block_vars.
5
 
6
2004-05-10  Diego Novillo  
7
 
8
        * tree-ssa-live.h: Fix typo in #include guard.
9
 
10
2004-05-08  Jeff Sturm  
11
 
12
        * tree-eh.c (lower_catch): Lower catch body in context of
13
        catch_region.
14
 
15
2004-05-07  Richard Henderson  
16
 
17
        * tree-eh.c (tree_could_trap_p): Use get_base_address on references.
18
 
19
2004-05-07  Diego Novillo  
20
 
21
        * doc/invoke.texi: Remove documentation for -ftree-copyprop.
22
        Update documentation for -ftree-pre.
23
 
24
2004-05-06  Richard Henderson  
25
 
26
        * stmt.c (parse_output_constraint): Don't warn for read-write
27
        memory operand.
28
        * gimplify.c (gimplify_asm_expr): Force in-out memory operands
29
        to minimal lvalues, then expand to non-matching constraints.
30
 
31
2004-05-06  Zack Weinberg  
32
 
33
        * c-decl.c (finish_function): When !targetm.have_ctors_dtors,
34
        record static constructors and destructors here...
35
        (c_expand_body_1): ... not here.
36
        * c-objc-common.c (start_cdtor, finish_cdtor): Collapse
37
        together into
38
        (build_cdtor): ...here.  Update to construct a complete tree
39
        for the function.  No need to call push_scope, pop_scope, or
40
        clear_last_expr, or set current_function_cannot_inline.
41
        (c_objc_common_finish_file): Just call build_cdtor for static
42
        ctors/dtors, then clear the variables.  Do this before calling
43
        cgraph_finalize_compilation_unit and cgraph_optimize.
44
 
45
2004-05-06  Richard Henderson  
46
 
47
        * fold-const.c (fold): Don't build COND_EXPR from comparisons for
48
        boolean and integer result types.  Handle X ^ X for TRUTH_XOR_EXPR.
49
 
50
2004-05-05  Richard Henderson  
51
 
52
        * tree-nested.c (create_tmp_var_for): Disallow variable sized types.
53
        (convert_nonlocal_reference): Set val_only false for the base of a
54
        component or array reference.
55
        (convert_local_reference): Likewise.
56
 
57
2004-05-05  Richard Henderson  
58
 
59
        * gimplify.c (create_tmp_var): Disallow variable sized objects.
60
        (gimplify_modify_expr): Don't memcpy for VA_ARG_EXPR.
61
 
62
2004-05-05  Richard Henderson  
63
 
64
        * fold-const.c (operand_equal_p): Replace only_const argument with
65
        flags.  Allow pure functions if OEP_PURE_SAME.
66
        (fold, nondestructive_fold_binary_to_constant): Use OEP_ONLY_CONST.
67
        * tree-cfg.c (phi_alternatives_equal): Fix operand_equal_p flag type.
68
        * tree-ssa-dom.c (avail_expr_eq): Use OEP_PURE_SAME.
69
        * tree.h (enum operand_equal_flag): New.
70
        (operand_equal_p): Update argument list.
71
 
72
2004-05-05  Richard Henderson  
73
 
74
        * tree-ssa-operands.c (get_call_flags): Remove.
75
        (get_expr_operands): Use call_expr_flags.
76
        * tree-alias-common.c (call_may_clobber): Likewise.
77
        (call_may_return): Likewise.
78
 
79
2004-04-05  Andrew Pinski  
80
 
81
        PR c/15062
82
        * c-typeck.c (build_asm_expr): Mark the output operands
83
        to an asm addressable, if necessary.
84
 
85
2004-05-05  Steven Bosscher  
86
 
87
        * Makefile.in (GTFILES): Remove duplicate basic-block.h.
88
 
89
2004-05-04  Richard Henderson  
90
 
91
        * gimplify.c (build_addr_expr_with_type): Set TREE_ADDRESSABLE.
92
        (gimplify_modify_expr): Turn variable-width assignment into memcpy.
93
        * tree-nested.c (convert_local_reference): Set val_only after default.
94
 
95
2004-05-04  Diego Novillo  
96
 
97
        * tree-cfg.c (tree_cfg2vcg): Rename from tree_cfg2dot.  Update all
98
        users.
99
        Emit flowgraph using VCG syntax.
100
        * tree-dump.c (dump_files): Rename -fdump-tree-dot to
101
        -fdump-tree-vcg.
102
        * tree.h (enum tree_dump_index): Rename TDI_dot to TDI_vcg.
103
        * doc/invoke.texi: Update documentation to describe
104
        -fdump-tree-vcg.
105
 
106
2004-05-03  Andrew Pinski  
107
 
108
        * objc/objc-act.c (build_objc_string_object):
109
        Add the fields to the purpose of the list for
110
        the constructor.
111
 
112
2004-05-03  Richard Henderson  
113
 
114
        * c-simplify.c (gimplify_if_stmt): Loop for else-if.
115
 
116
2004-05-03  Andrew Pinski  
117
 
118
        PR optimization/15245
119
        * tree-ssa-phiopt.c (conditional_replacement): Use fold_convert
120
        instead of convert.
121
 
122
2004-05-03  Diego Novillo  
123
 
124
        * gimplify.c (gimplify_compound_lval): Gimplify non-constant
125
        array indices into a temporary variable.
126
 
127
2004-04-30  Richard Henderson  
128
 
129
        * builtins.c (validate_arglist): Don't reject side effects.
130
        (simplify_builtin_strcpy): Do reject side effects in length.
131
 
132
2004-04-30  Jeff Law  
133
 
134
        * tree-outof-ssa.c (eliminate_build): Move code which verifies
135
        that all of a PHI's arguments do not have a partition if the
136
        result does not have a partition from here to...
137
        (rewrite_trees): Here.
138
 
139
2004-04-24  Zdenek Dvorak  
140
 
141
        * tree-cfg.c (factored_computed_goto_label,
142
        factored_computed_goto): Removed.
143
        (disband_implicit_edges): Unfactor computed gotos without
144
        using them.
145
 
146
2004-04-23  Per Bothner  
147
 
148
        * expr.c (expr_wfl_stack):  Remove unused global.
149
 
150
        Pre-patches for future source_location / location_t merge.
151
        * tree.h (EXPR_LOCATION, EXPR_HAS_LOCATION):  New macros.
152
        * expr.c (expand_expr_real, expand_expr_real_1):  Use new macros.
153
        * gimple-low.c (lower_stmt):  Likewise.
154
        * gimplify.c (annotate_all_with_locus):  Likewise.
155
        * print-tree.c (print_node):  Likewise.
156
        * tree-inline.c (expand_call_inline):  Likewise.
157
        * tree-pretty-print.c (tree-pretty-print.c):  Likewise.
158
        * tree-sra.c (scalarize_structure_assignment, emit_scalar_copies,
159
        scalarize_call_expr):  Likewise.
160
        * tree-ssa-pre.c (code_motion):  Likewise.
161
 
162
2004-04-23  Andrew Pinski  
163
 
164
        * c-simplify.c (gimplify_decl_stmt) [TYPE_DECL]:
165
        Do not check the type.
166
 
167
2004-04-22  Jeff Law  
168
 
169
        * tree-into-ssa.c (rewrite_initialize_block_local_data): Mark all
170
        arguments as potentially unused.  Do not bother to VARRAY_CLEAR
171
        the block_defs.  Instead abort if we are presented with a block
172
        which has a nonempty block_defs.  Wrap entire thing inside
173
        #ifdef ENABLE_CHECKING.
174
        * tree-ssa-dom.c (dom_opt_initialize_block_local_data): Similarly
175
 
176
        * tree-ssa-dom.c (redirect_edges_and_update_ssa_graph): Do not mark
177
        arguments to bypassed PHIs as needing to be rewritten.
178
 
179
2004-04-21  Richard Henderson  
180
 
181
        PR middle-end/14978
182
        * tree-nested.c (convert_nonlocal_reference): Set val_only when
183
        processing any otherwise unhandled expression.
184
 
185
2004-04-21  Jeff Law  
186
 
187
        * tree-ssa-copy.c (cprop_operand): Break out of cprop_into_stmt.
188
        (cprop_into_stmt): Use cprop_operand.  Rearrange slightly to avoid
189
        switch statement inside a loop.
190
 
191
        * tree-flow.h (var_ann_d): Add "current_def" field.
192
        (register_new_def): Lose last argument (currdefs table).
193
        * tree-into-ssa.c (currdefs): Remove.
194
        (rewrite_into_ssa): Initialize current_def field on each variable's
195
        annotation.  Remove initialization/clearing of currdefs.
196
        (set_value_for, get_value_for): Kill.
197
        (rewrite_initialize_block): Update call to register_new_def.
198
        (rewrite_stmt): Similarly.
199
        (rewrite_finalize_block): Get/set a _DECL node's current
200
        definition from its annotation.
201
        (get_reaching_def): Similarly.
202
        (register_new_def): Similarly.  Lose last argument.
203
        * tree-ssa-dom.c (currdefs): Remove.
204
        (get_value_for, set_value_for): Simplify.
205
        (tree_ssa_dominator_optimize): Initialize current_def on each
206
        variable's annotation.  Remove initialization/clearing of currdefs.
207
        (thread_across_edge): Lose unnecessary argument to register_new_def.
208
        (record_equivalences_from_phis): Likewise.
209
        (register_definitions_for_stmt): Likewise.
210
        (restore_currdefs_to_original_value): Get/set a _DECL node's current
211
        definition from its annotation.  Lose unnecessary "table" argument.
212
        (dom_opt_finalize_block): Corresponding changes.
213
 
214
        * tree-dfa.c (free_df_for_stmt): Release memory back to the GC
215
        system immediately.
216
 
217
2004-04-21  Ben Elliston  
218
 
219
        PR middle-end/14730
220
        * expr.c (expand_expr_real_1) : Discard out of bounds
221
        case label values and ranges.  Saturate case range values that
222
        exceed the minimum or maximum permitted value for the controlling
223
        expression type to TYPE_MIN_VALUE or TYPE_MAX_VALUE.
224
 
225
2004-04-20  Jeff Law  
226
 
227
        * tree-into-ssa.c (register_new_def): Avoid pushing useless
228
        information onto the block local definition stack.
229
 
230
        * tree-into-ssa.c (register_new_def): If there is no current
231
        reaching definition for SSA_NAME_VAR (DEF), then just push
232
        SSA_NAME_VAR (DEF) onto the stack.
233
        (rewrite_finalize_block): If we pop a _DECL node from the stack,
234
        then the _DECL node has no current reaching definition.
235
        * tree-ssa-dom.c (restore_currdefs_to_original_value): Similarly.
236
 
237
2004-04-19  Jeff Law  
238
 
239
        * tree-ssa-dom.c: Reinstate all changes from 2004-04-12.
240
        (lookup_avail_expr): Do not access a hash table object after
241
        it has been freed.
242
 
243
2004-04-19  Daniel Berlin  
244
 
245
        * doc/passes.texi: Add blurb about PRE.
246
 
247
2004-04-19  Andrew Pinski  
248
 
249
        * tree-ssa-phiopt.c (conditional_replacement):
250
        Catch some more non-gimple.
251
 
252
2004-04-19  Jan Hubicka  
253
 
254
        * predict.c (combine_predictions_for_bb): Fix pasto.
255
 
256
2004-04-18  Jan Hubicka  
257
 
258
        * tree-inline.c (estimate_num_insn_1): Deal properly with
259
        builtin_constant_p and builtin_expect.
260
 
261
2004-04-17  Andrew MacLeod  
262
 
263
        * doc/invoke.texi (tree-ter, tree-lrs): Document options.
264
 
265
2004-04-17  Paul Brook  
266
 
267
        * Makefile.in: Set GMPLIBS and GMPINC.
268
        * configure.ac: Add GMPLIBS and GMPINC.
269
        * configure: Regenerate.
270
 
271
2004-04-16  Andrew MacLeod  
272
 
273
        * common.opt (ftree-lrs): New common option.
274
        * flags.h (flag_tree_live_range_split): New flag.
275
        * opts.c (decode_options): Turn on LRS by default.
276
        (common_handle_option): Set LRS flag to specified value.
277
        * toplev.c (flag_tree_live_range_split): Initialize.
278
        (lang_independent_options f_): Add tree-lrs.
279
        * tree-outof-ssa.c (rewrite_out_of_ssa): Use LRS flag.
280
        * tree-ssa-copyrename.c (copy_rename_partition_coalesce): Don't coalesce
281
        variables if one is a hardware register.  Coalesce inlined user vars.
282
        (rename_ssa_copies): Scan blocks first, then PHI nodes.
283
 
284
2004-04-15  Andrew Pinski  
285
 
286
        * builtins.c (fold_builtin_isascii): Do not return non-gimple
287
        code when we are in gimple form.
288
        (fold_builtin_isdigit): Do not return non-gimple
289
        code when we are in gimple form.
290
 
291
        * c-simplify.c (gimplify_decl_stmt): Handle TYPE_DECL.
292
 
293
2004-04-14  Paul Brook  
294
 
295
        * Makefile.in (GMPLIBS, GMPINC): Don't set.
296
        * configure.ac: Remove checks for GMP.
297
        * configure: Regenerate.
298
 
299
2004-04-13  Diego Novillo  
300
 
301
        * fold-const.c, tree-ssa-ccp.c, tree-ssa-dom.c,
302
        tree-ssa.c, tree.c: Replace all uses of TREE_UNSIGNED with
303
        TYPE_UNSIGNED or DECL_UNSIGNED.
304
 
305
        * c-semantics.c (build_stmt): Don't check type nodes for
306
        side effects.
307
 
308
2004-04-13  Jeff Law  
309
 
310
        * tree-ssa-dom.c: Revert all changes from 2004-04-12.
311
 
312
2004-04-12  Jeff Law  
313
 
314
        * tree-ssa-dom.c (struct expr_hash_elt): Add new field for hash value.
315
        (initialize_hash_element): New LHS argument.  Callers changed.
316
        Initialize the hash value field.
317
        (remove_local_expressions_from_table): Use htab_remove_elt_with_hash.
318
        (update_rhs_and_lookup_avail_expr): Similary.
319
        (lookup_avail_expr): Use htab_find_slot_with_hash.  Simplify slightly
320
        and pass LHS to initialize_hash_element.
321
        (record_cond): Also use htab_find_slot_with_hash.  Initialize the
322
        hash table entry with initialize_hash_element.
323
        (avail_expr_eq): Use the saved hash value rather than calling into
324
        the hash functions again.
325
 
326
        * tree-ssa-dom.c (tree_ssa_dominator_optimize): Slightly rearrange
327
        code to clear tables before each iteration to be clearer.
328
 
329
        * tree-ssa-dom.c (redirect_edges_and_update_ssa_graph): Use
330
        DEF_OPS and VDEF_OPS instead of STMT_DEF_OPS and STMT_VDEF_OPS.
331
 
332
2004-04-12  Diego Novillo  
333
 
334
        * flags.h (flag_tree_loop): Remove.  Update all users.
335
        * opts.c (common_handle_option) : Remove.
336
        * toplev.c (f_options): Remove -ftree-loop-optimize.
337
        * tree-optimize.c (init_tree_optimization_passes): Don't
338
        schedule pass_loop.
339
        * tree-ssa-loop.c (tree_ssa_loop_opt): Remove.
340
        (gate_loop): Remove.
341
        * doc/invoke.texi: Remove documentation for -ftree-loop-optimize.
342
 
343
2004-04-12  Diego Novillo  
344
 
345
        * c-lang.c (LANG_HOOKS_RTL_EXPAND_STMT): Remove.
346
        * c-semantics.c (expand_stmt_toplev): Remove.
347
        * langhooks-def.h (LANG_HOOKS_RTL_EXPAND_INITIALIZER): Remove.
348
        (LANG_HOOKS_RTL_EXPAND_START): Remove.
349
        (LANG_HOOKS_RTL_EXPAND_STMT): Remove.
350
        (LANG_HOOKS_RTL_EXPAND_END): Remove.
351
        * langhooks.h (struct lang_hooks_for_rtl_expansion): Remove.
352
        (struct lang_hooks): Update.
353
        * tree-optimize.c (tree_rest_of_compilation): Don't call
354
        lang_hooks.rtl_expand.start nor lang_hooks.rtl_expand.end.
355
        Call expand_expr_stmt_value instead of
356
        lang_hooks.rtl_expand.stmt.
357
        * objc/objc-lang.c (LANG_HOOKS_RTL_EXPAND_STMT): Remove.
358
 
359
 
360
2004-04-12  Richard Henderson  
361
 
362
        * c-common.c (c_do_switch_warnings): Use EXPR_LOCUS instead
363
        of STMT_LINENO.
364
        (c_walk_subtrees): Likewise.
365
        (c_estimate_num_insns_1): Remove FILE_STMT.
366
        * c-common.def (FILE_STMT): Remove.
367
        * c-common.h (FILE_STMT_FILENAME_NODE): Remove.
368
        (FILE_STMT_FILENAME, STMT_LINENO, STMT_LINENO_FOR_FN_P): Remove.
369
        (c_common_stmt_codes): Remove FILE_STMT.
370
        * c-dump.c (dump_stmt): Use EXPR_LOCUS instead of STMT_LINENO.
371
        * c-parse.in (lineno_stmt, lineno_label): Likewise.
372
        * c-pretty-print.c (pp_c_statement): Remove FILE_STMT.
373
        * c-semantics.c (add_stmt): Don't emit FILE_STMT.  Do set
374
        EXPR_LOCUS if not yet set.
375
        (finish_stmt_tree): Don't set line for end of function.
376
        (build_stmt): Set EXPR_LOCUS instead of STMT_LINENO.
377
        (prep_stmt): Use EXPR_LOCUS instead of STMT_LINENO.
378
        * c-simplify.c (c_gimplify_stmt): Remove FILE_STMT.
379
        (gimplify_block): Save and restore entire locus.
380
        (stmt_expr_last_stmt): Use EXPR_LOCUS instead of STMT_LINENO.
381
        * doc/c-tree.texi (FILE_STMT, FILE_STMT_FILENAME, STMT_LINENO): Remove.
382
 
383
2004-04-12  Jeff Law  
384
 
385
        * tree-ssa-dom.c (true_exprs, false_exprs): Kill.
386
        (struct expr_hash_elt): New structure for the expression hash table.
387
        (struct dom_walk_block_data): Kill block local true_exprs and
388
        false_exprs.
389
        (get_eq_expr_value): One less local varray argument.  Fix prototype.
390
        Use record_cond rather than record_cond_is_{true,false}.
391
        (true_false_expr_hash, true_false_expr_eq): Kill.
392
        (record_cond_is_true, record_cond_is_false): Collapse into ...
393
        (record_cond): New function.
394
        (tree_ssa_dominator_optimize): Kill references to true_exprs and
395
        false_exprs.  Use "free" as the free function for the avail_exprs
396
        hash table.
397
        (dom_opt_initialize_block_local_data): No longer initialize
398
        block local true/false expressions.
399
        (initialize_hash_element): New function.
400
        (remove_local_expressions_from_table): Use initialize_hash_element.
401
        (update_rhs_and_lookup_avail_expr): Similarly.
402
        (dom_opt_finalize_block): Record true/false expressions into the
403
        main avail_expr hash table.  Unwind main hash table appropriately.
404
        Use record_cond rather than record_cond_is_{true,false}.
405
        (record_equivalences_from_incoming_edge): Pass block local avail_exprs
406
        varray instead of block local true/false varrays to get_eq_expr_value.
407
        (dump_dominator_optimization_stats): Update to reflect that the
408
        true/false expression hash tables are gone.
409
        (lookup_avail_expr): Simplify slightly now that we only have one
410
        expression hash table.
411
        (avail_expr_hash, avail_expr_eq): Generalize slightly to handle new
412
        hash table entry structure and having true/false expression information
413
        in the available expression hash table.
414
 
415
2004-04-09  Jeff Law  
416
 
417
        * tree-ssa_dom.c (register_definitions_for_stmt): Accept a statement
418
        annotation rather than the statement itself.  Callers changed.
419
        Use [V]DEF_OPS rather than STMT_[V]DEF_OPS.
420
        * tree-ssa-operands.c (get_stmt_operands): Slightly reorganize to
421
        avoid unnecessary calls to stmt_ann.
422
        * tree-ssa-pre.c (expr_phi_insertion): Get the statement's annotation
423
        and use [V]USE_OPS rather than STMT_[V]USE_OPS.
424
        (same_e_version_phi_result): Similarly
425
        (process_left_occs_and_kills): Similarly for [V]DEF_OPS and
426
        STMT_[V]DEF_OPS.
427
        * tree-ssa.c (replace_immediate_uses): Similarly.
428
        (verify_ssa): Similarly.  Also verify that VDEF_OPs uses are dominated
429
        by their sets.
430
 
431
        * tree-into-ssa.c (insert_phi_nodes_for): Use passed in worklist
432
        varray instead of allocated one for every variable we rewrite into
433
        SSA form.
434
        (insert_phi_nodes_1): Pass worklist varray from caller to
435
        insert_phi_nodes_for.
436
        (insert_phi_nodes): Allocate a worklist for insert_phi_nodes_for
437
        and pass it to insert_phi_nodes_1.
438
 
439
2004-04-08  Jeff Law  
440
 
441
        * tree-ssa-dom.c (nonzero_vars): Turn it into a bitmap.
442
        (tree_ssa_dominator_optimize): Update initialization, clearing and
443
        freeing of nonzero_vars.
444
        (restore_nonzero_vars_to_original_value): New function.
445
        (dom_opt_finalize_block): Use it.
446
        (record_var_is_nonzero): Only record the variable into the block
447
        local nonzero vars array if it did not already have a nonzero property.
448
        (lookup_avail_expr): Lookup the nonzero property of an SSA_NAME with
449
        a bitmap test.
450
 
451
        * fold-const.c (fold): Remove attempt to share code which
452
        simplifies tests against the highest/lowest value of a
453
        range between the main folder and the nondestructive folder.
454
 
455
2004-04-08  Brian Booth  
456
            Diego Novillo  
457
 
458
        * tree-into-ssa.c (invalidate_name_tags): New function.
459
        Mark aliases of invalidated name tags for renaming.
460
        (rewrite_into_ssa): Call invalidate_name_tags.
461
 
462
2004-04-07  Diego Novillo  
463
 
464
        * gimplify.c (gimplify_call_expr): Remove argument POST_P.
465
        Update all callers.
466
        Don't use POST_P when gimplifying the call expression.
467
 
468
2004-04-07  Diego Novillo  
469
 
470
        * doc/tree-ssa.texi: Add documentation for the dominator
471
        walker.
472
 
473
2004-04-07  Andrew MacLeod  
474
 
475
        * tree-outof-ssa.c: Update comments and reformat for legibility.
476
        * tree-ssa-copyrename.c: Update comments and reformat for legibility.
477
        * tree-ssa-live.c: Update comments and reformat for legibility.
478
        * tree-ssa-live.h: Update comments and reformat for legibility.
479
 
480
2004-04-07  Diego Novillo  
481
 
482
        * gimplify.c (gimplify_call_expr): Don't use POST_P when
483
        gimplifying CALL_EXPR arguments.
484
 
485
2004-04-06  Diego Novillo  
486
 
487
        * tree-dfa.c: Update comments and reformat for legibility.
488
        (find_vars_r): Remove special casing of MODIFY_EXPR and
489
        simplify logic.
490
        (compute_reached_uses, compute_reaching_defs, remove_decl,
491
        find_decl_location): Remove.
492
        (discover_nonconstat_array_refs_r,
493
        discover_nonconstant_array_refs): Move ...
494
        * tree-outof-ssa.c: ... here.
495
 
496
2004-04-05  Richard Henderson  
497
 
498
        * tree-simple.c (is_gimple_min_invariant): Disallow &a+i.
499
        * tree-ssa-ccp.c (maybe_fold_stmt_addition): Rename from
500
        maybe_fold_stmt_plus.  Handle MINUS_EXPR.
501
        (fold_stmt_r): Pass MINUS_EXPR to it.
502
 
503
2004-04-05  Ben Elliston  
504
 
505
        * Makefile.in (OBJS-common): Remove tree-browser.o.
506
        (cc1): Depend on @TREEBROWSER@ and include in list of objects.
507
        * configure.ac: Add --enable-tree-browser option.
508
        * configure: Rebuild.
509
 
510
2004-04-05  Andrew Pinski  
511
 
512
        * tree-ssa-ccp.c (fold_stmt_r): Fix whitespace formatting.
513
        (set_rhs): Likewise.
514
 
515
2004-04-03  Paolo Bonzini  
516
            Diego Novillo  
517
 
518
        * tree-alias-common.c (find_func_aliases): Support
519
        assigning to BIT_FIELD_REFs.
520
        * tree-cfg.c (verify_expr): Don't allow assign to
521
        a register with BIT_FIELD_REF.
522
        * tree-dfa.c (get_virtual_var): Add consistency check on
523
        the shape of expected VARs.
524
        (discover_nonconstant_array_refs_r): Go through BIT_FIELD_REFs.
525
        * tree-simple.c: Document that BIT_FIELD_REFs are valid lvalues.
526
        * tree-ssa.c (set_is_used): Go through BIT_FIELD_REFs.
527
        * tree-ssa-operands.c (get_expr_operands): Mark VA_ARG_EXPR
528
        nodes as making volatile references.
529
 
530
2004-04-02  Fariborz Jahanian 
531
 
532
        * c-convert.c (convert): Make convert work when converting
533
        to compatible types across translation unit.
534
 
535
2004-04-02  Andrew Pinski  
536
 
537
        * Makefile.in (stage2_build): Remove support for
538
        rebuilding libbanshee.
539
        * configure.ac: Remove support for rebuilding
540
        libbanshee.
541
        * config.gcc (powerpc-*-darwin*): Do not rebuild
542
        libbanshee.
543
 
544
2004-04-01  Kazu Hirata  
545
 
546
        * tree-ssa-forwprop.c: Add a comment about forward propagation
547
        of TRUTH_NOT_EXPR.
548
 
549
2004-04-01  Diego Novillo  
550
 
551
        * tree-optimize.c (tree_rest_of_compilation): Fix typo in
552
        setting of in_gimple_form.
553
 
554
2004-04-01  Jeff Law  
555
 
556
        * fold-const.c (fold_relational_hi_lo): Do not return non-gimple
557
        code when we are in gimple form.
558
        * tree-optimize.c (tree_rest_of_compilation): Note when we are in
559
        gimple form.
560
        * tree-ssa-ccp.c (ccp_fold): Tighten tests on return value from
561
        nondestructive_fold_{unary,binary}_to_constant.
562
        * tree.h (in_gimple_form): Declare.
563
 
564
        * tree-ssa.c (ssa_remove_edge): Correct looping structure.
565
        (ssa_redirect_edge): Similarly
566
 
567
2004-03-30  Brian Booth  
568
 
569
        * tree-pretty-print.c (dump_vops): Add flags argument and
570
        propagate it to dump_generic_node calls.
571
        (dump_generic_node): Update dump_vops call.
572
 
573
2004-03-29  Diego Novillo  
574
 
575
        * configure.ac: Emit confirmation messages for libbanshee.
576
        * configure: Regenerate.
577
 
578
2004-03-29  Jan Hubicka  
579
 
580
        PR 14756
581
        * cgraphunit.c (cgraph_decide_inlining): Rewrite handling of
582
        always_inline functions.
583
 
584
2004-03-28  Jan Hubicka  
585
 
586
        * tree-inline.c (expand_call_inline):  Remove fixme introduced by
587
        nested function patch.
588
 
589
2004-03-26  Diego Novillo  
590
 
591
        * tree-ssa-operands.c (get_stmt_operands): Remove always-true
592
        predicate.
593
 
594
        * tree-ssa-alias.c (maybe_create_global_var): Create
595
        .GLOBAL_VAR if there are no call-clobbered variables.
596
        * tree-ssa-operands.c (get_stmt_operands): Add call-clobbering
597
        VDEFs for asm ("":::"memory") if there are call-clobbered
598
        variables or if .GLOBAL_VAR has been created.
599
 
600
 
601
2004-03-26  Diego Novillo  
602
 
603
        * passes.c (rest_of_compilation): Re-enable .01.rtl
604
        dumps.
605
 
606
2004-03-25  Diego Novillo  
607
 
608
        * tree-pretty-print.c (dump_generic_node) : Remove.
609
        * tree-inline.c (estimate_num_insns_1) : Remove.
610
        * fold-const.c (fold_relational_hi_lo): Change type of argument
611
        'type_p' to const tree and rename it to 'type'.  Update
612
        all callers.
613
 
614
2004-03-25  Diego Novillo  
615
 
616
        * Makefile.in (C_AND_OBJC_OBJS): Remove c-call-graph.o
617
        (c-call-graph.o): Remove.
618
        * c-call-graph.c: Remove.
619
        * c-tree.h (print_call_graph): Remove.
620
        (debug_call_graph): Remove.
621
        * tree-cfg.c: Update/add comments everywhere.
622
        (pre_insert_on_edge): Rename from bsi_insert_on_edge_immediate.
623
        * tree-flow.h (build_tree_cfg): Make static.
624
        (tree_cfg2dot): Likewise.
625
        (verify_stmt): Likewise.
626
        * tree-ssa-pre.c (insert_one_operand): Call pre_insert_on_edge.
627
 
628
2004-03-25  Diego Novillo  
629
 
630
        * tree-ssa-alias.c (struct alias_info): Change type of field
631
        'num_references' to varray_type.  Update all users.
632
 
633
2004-03-24  Jeff Law  
634
 
635
        * c-mudflap (mflang_flush_calls): Use push_scope/pop_scope instead
636
        of pushlevel and poplevel.
637
 
638
2004-03-23  Richard Henderson  
639
 
640
        PR middle-end/14694
641
        * c-common.c (handle_alias_attribute): Mark aliased variables
642
        to be TREE_STATIC.
643
 
644
2004-03-23  Jeff Law  
645
 
646
        * tree-into-ssa.c (register_new_def): Lose unnecessary VAR argument,
647
        instead derive VAR from DEF argument.
648
        (rewrite_initialize_block, rewrite_stmt, rewrite_operand): Corresponding
649
        changes.
650
        * tree-ssa-dom.c (register_definitions_for_stmt): Corresponding changes.
651
        (record_equivalences_from_phis): Likewise.
652
        (restore_currdefs_to_original_value): New, extracted from ...
653
        (dom_opt_finalize_block): Use restore_currdefs_to_original_value.
654
        Restore currdefs after threading across a true edge.
655
        (thread_across_edge): Register new defintions when we walk through
656
        a PHI node or real statement.
657
        * tree-flow.h (register_new_def): Updated.
658
 
659
2004-03-23  Zdenek Dvorak  
660
 
661
        * tree-ssa-dce.c (find_obviously_necessary_stmts,
662
        perform_tree_ssa_dce): Do not remove loops.
663
 
664
2004-03-19  Diego Novillo  
665
 
666
        PR optimization/14643
667
        * tree-ssa-alias.c (group_aliases_into): Don't add a variable
668
        to its own may-alias set.
669
        (create_alias_map_for): New.
670
        (setup_pointers_and_addressables): Call it.
671
        Fix allocation of AI->ADDRESSABLE_VARS and AI->POINTERS.
672
        If there are no addressable variables and more than one
673
        dereferenced pointers, add type tags to the ADDRESSABLE_VARS
674
        array.
675
        (get_tmt_for): Add comment about using alias set equality when
676
        checking for existing tags.
677
 
678
2004-03-19  Kazu Hirata  
679
 
680
        * fold-const.c (fold_relational_const): Remove dead code.
681
 
682
2004-03-19  Dale Johannesen  
683
 
684
        * tree-ssa-dse.c (dse_optimize_stmt):  Redirect uses feeding into
685
        a deleted store correctly.
686
 
687
2004-03-19  Jeff Law  
688
 
689
        * tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): Fix typo.
690
        Eliminate unnecessary test of VAL.
691
 
692
        * tree-dfa.c (find_hidden_use_vars): Also look inside the
693
        PENDING_SIZES list for hidden uses.
694
        * tree-optimize.c (tree_rest_of_compilation): Expand used variables
695
        before setting up parameters.
696
        * tree-ssa-copyrename.c (rename_ssa_copies): Do nothing for copies
697
        where the LHS has a hidden use.
698
 
699
2004-03-18  Diego Novillo  
700
 
701
        * Makefile.in (TREE_FLOW_H): Reformat.
702
        (OBJS-common): Add tree-into-ssa.o and tree-outof-ssa.o.
703
        (tree-ssa.o): Remove dependency on domwalk.h and tree-ssa-live.h
704
        (tree-into-ssa.o): New.
705
        (tree-outof-ssa.o): New.
706
        (GTFILES): Remove tree-ssa.c.
707
        (gt-tree-ssa.h): Remove.
708
        * tree-into-ssa.c: New file.
709
        Move all the functions used to rename into SSA from tree-ssa.c.
710
        Update/add comments.
711
        Remove unused variables and structures.
712
        Don't use GGC for memory allocation.
713
        * tree-outof-ssa.c: New file.
714
        Move all the functions used to rename out of SSA from
715
        tree-ssa.c.
716
        Update/add comments.
717
        * tree-ssa-alias.c (compute_points_to_and_addr_escape): Add
718
        bibliographic reference.
719
 
720
2004-03-18  Jeff Law  
721
 
722
        * Makefile.in (tree-tailcall.o): Depend on langhooks.h.
723
        * tree-tailcall.c: Include langhooks.h.
724
        (find_tail_calls): Use types_compatible_p langhook instead of
725
        equality test of TYPE_MAIN_VARIANT.
726
 
727
        * tree-nested.c (get_chain_decl): Mark the chain decl with
728
        TREE_NO_WARNING.
729
 
730
2004-03-18  Devang Patel  
731
 
732
        * tree-ssa-live.c (new_tree_live_info): Set num_blocks to
733
        last_basic_block instead of n_basic_blocks.
734
        (calculate_live_on_entry): Use last_basic_block instead of
735
        n_basic_blocks.
736
        (calculate_live_on_exit): Same.
737
 
738
2004-03-17  Jeff Law  
739
 
740
        * tree-tailcall.c (find_tail_calls): Tighten test for tail recursion.
741
 
742
2004-03-17  Diego Novillo  
743
 
744
        PR optimization/14511
745
        * tree-ssa-alias.c (compute_flow_insensitive_aliasing): Do not
746
        ignore read-only variables.
747
        (may_alias_p): Fix pointer-to-var calculation when 'var' is an
748
        array.
749
 
750
2004-03-17  Jan Hubicka  
751
 
752
        * tree-ssa.c (rewrite_into_ssa, compute_global_livein): Fix.
753
 
754
2004-03-17  Paolo Bonzini  
755
 
756
        * builtins.c (expand_builtin_constant_p,
757
        purge_builtin_constant_p): Remove.
758
        (expand_builtin): Expand __builtin_constant_p to zero.
759
        * function.c (struct function): Remove calls_constant_p.
760
        (current_function_calls_constant_p): Remove.
761
        * passes.c (rest_of_handle_gcse): Do not run
762
        purge_builtin_constant_p.
763
        * rtl.def (CONSTANT_P_RTX): Die die die.
764
 
765
        * cse.c (fold_rtx): Do not handle CONSTANT_P_RTX.
766
        * expr.c (emit_move_insn): Likewise.
767
        * gcse.c (want_to_gcse_p, gcse_constant_p): Likewise.
768
        * genrecog.c (validate_pattern): Likewise.
769
        * recog.c (immediate_operand): Likewise.
770
        * rtl.h (CONSTANT_P): Likewise.
771
        * simplify-rtx.c (simplify_rtx): Likewise.
772
        * config/alpha/alpha.c (input_operand): Likewise.
773
        * config/arm/arm.c (THUMB_LEGITIMATE_CONSTANT_P): Likewise.
774
        * config/c4x/c4x.c (const_operand): Likewise.
775
        * config/cris/cris.c (cris_gotless_symbol,
776
        cris_got_symbol): Likewise.
777
        * config/frv/frv.h (LEGITIMATE_PIC_OPERAND_P): Likewise.
778
        * config/ia64/ia64.c (gr_reg_or_5bit_operand,
779
        gr_reg_or_6bit_operand, gr_reg_or_8bit_operand,
780
        gr_reg_or_8bit_adjusted_operand,
781
        gr_reg_or_8bit_and_adjusted_operand,
782
        gr_reg_or_14bit_operand, gr_reg_or_22bit_operand,
783
        shift_count_operand, shift_32bit_count_operand): Likewise.
784
        * config/m32r/m32r.c (move_src_operand): Likewise.
785
        * config/mips/mips.c (mips_const_insns): Likewise.
786
        * config/mmix/mmix.c (mmix_constant_address_p): Likewise.
787
        * config/pa/pa.c (move_src_operand): Likewise.
788
        * config/rs6000/rs6000.c (input_operand): Likewise.
789
        * config/sparc/sparc.c (input_operand): Likewise.
790
        * config/v850/v850.c (movsi_source_operand): Likewise.
791
        * config/xtensa/xtensa.c (move_operand,
792
        xtensa_emit_move_sequence): Likewise.
793
        * config/ia64/ia64.h (PREDICATE_CODES): Do not mention CONSTANT_P_RTX.
794
        * config/pa/pa.h (PREDICATE_CODES): Likewise.
795
 
796
2004-03-16  Diego Novillo  
797
 
798
        * tree-dump.c (struct dump_option_value_info): Add TDF_UID.
799
        * tree.h (TDF_UID): Define.
800
        * doc/invoke.texi: Document -ftree-dump-...-uid.
801
        * tree-pretty-print.c (debug_generic_expr): Add TDF_UID.
802
        (debug_generic_stmt): Likewise.
803
        (dump_decl_name): New function.
804
        (dump_generic_node): Call it.
805
        (print_declaration): Add new argument 'flags'.  Update all users.
806
        (print_struct_decl): Likewise.
807
        * tree-alias-ander.c, tree-cfg.c, tree-dfa.c, tree-mudflap.c,
808
        tree-nrv.c, tree-sra.c, tree-ssa-alias.c, tree-ssa-ccp.c,
809
        tree-ssa-copy.c, tree-ssa-dom.c, tree-ssa-dse.c,
810
        tree-ssa-forwprop.c, tree-ssa-operands.c, tree-ssa-pre.c,
811
        tree-ssa.c, tree-tail-call.c: Call print_generic_* with
812
        'dump_flags'.
813
 
814
2004-03-16  Dale Johannesen  
815
 
816
        * Makefile.in (tree-ssa-phiopt.o): add langhooks.h dependency.
817
        (tree-nrv.o): Ditto.
818
        (tree-ssa-copy.o): Ditto.
819
        (tree-ssa-dom.o): Ditto.
820
        (tree-ssa-ccp.o): Ditto.
821
        * c-common.c: Add #include hashtab.h.
822
        (c_type_hash): New.
823
        (c_common_get_alias_set): Handle multiple type nodes referring
824
        to "the same" type, currently for C90 only.
825
        * c-decl.c (current_file_decl): Move to toplev.c.
826
        * c-lang.c (LANG_HOOKS_TYPES_COMPATIBLE_P): Define to
827
        c_types_compatible_p.
828
        (c_types_compatible_p): New.
829
        * c-tree.h (c_types_compatible_p): New declaration.
830
        * c-typeck.c (tagged_types_tu_compatible_p): Allow for
831
        compiler-generated TYPE_DECLs without a DECL_ORIGINAL_TYPE.
832
        * gimplify.c (canonicalize_addr_expr): Use types_compatible_p langhook.
833
        (cpt_same_type): Ditto.
834
        * langhooks-def.h (lhd_types_compatible_p): New declaration.
835
        LANG_HOOKS_TYPES_COMPATIBLE_P: New.
836
        * langhooks.c (lhd_types_compatible_p): New.
837
        * langhooks.h (struct lang_hooks): Add types_compatible_p.
838
        * stmt.c (tail_recursion_args): Use types_compatible_p langhook.
839
        * toplev.c (current_file_decl): New, moved from c-decl.c.
840
        * tree-nrv.c: Include langhooks.h.
841
        (tree_nrv): Use types_compatible_p langhook.
842
        * tree-ssa-ccp.c: Include langhooks.h.
843
        (maybe_fold_offset_to_array_ref): Use types_compatible_p langhook.
844
        (maybe_fold_offset_to_component_ref): Ditto (2 places).
845
        (fold_stmt_r): Make sure rhs of COMPONENT_REF is in lhs type.
846
        * tree-ssa-copy.c: Include langhooks.h.
847
        (cprop_into_stmt): Use types_compatible_p langhook.
848
        * tree-ssa-dom.c: Include langhooks.h.
849
        (avail_expr_p): Use types_compatible_p langhook.
850
        * tree-ssa-phiopt.c: Include langhooks.h.
851
        (conditional_replacement): Use types_compatible_p langhook.
852
        * tree-ssa.c (tree_ssa_useless_type_conversion_1): Use
853
        types_compatible_p langhook.
854
        * tree.h (current_file_decl): New declaration.
855
 
856
2004-03-16  Dale Johannesen  
857
 
858
        PR optimization/14498
859
        * gimplify.c (copy_if_shared_r): Mark VA_ARGS_EXPRs as volatile.
860
        (mark_decls_volatile_r): Moved higher in file (unchanged).
861
 
862
2004-03-16  Daniel Berlin  
863
 
864
        PR optimization/14562
865
        * tree-ssa-pre.c (generate_expr_as_of_bb): Don't use names_match_p.
866
        (generate_vops_as_of_bb): Ditto.
867
 
868
2004-03-12  Diego Novillo  
869
 
870
        PR optimization/14553
871
        * tree-ssa.c (replace_immediate_uses): Call propagate_value to
872
        update operands.
873
 
874
2004-03-12  Diego Novillo  
875
 
876
        * tree-alias-common.c (create_alias_vars): Add #if
877
        HAVE_BANSHEE around test for PTA_ANDERSEN.
878
 
879
2004-03-11  Diego Novillo  
880
 
881
        * tree-dfa.c (struct walk_state): Remove fields 'is_store' and
882
        'is_indirect_ref'.  Update all users.
883
        * tree-flow.h (struct var_ann_d): Remove fields 'is_stored',
884
        'is_dereferenced_store' and 'is_dereferenced_load'.  Update
885
        all users.
886
        * tree-simple.c (get_base_address): Handle BIT_FIELD_REF.
887
        * tree-ssa-alias.c (struct alias_info): Add fields
888
        'written_vars', 'dereferenced_ptrs_store' and
889
        'dereferenced_ptrs_load'.
890
        (init_alias_info): Initialize them.
891
        (delete_alias_info): Free them.
892
        (find_ptr_dereference): New.
893
        (ptr_is_dereferenced_by): Call it.
894
        Add new argument 'is_store'.  Set to true if the
895
        expression is an indirect store operation.
896
        (compute_points_to_and_addr_escape): If the statement
897
        makes a store, load or write operation, update the
898
        corresponding bitmap.
899
        (compute_flow_insensitive_aliasing): Test the
900
        'written_vars' bitmap to determine if alias sets should
901
        be computed.
902
        (setup_pointers_and_addressables): Always assume that
903
        volatile pointers and hidden pointers have been used in a
904
        memory store operation.
905
        * tree-ssa-operands.c (add_stmt_operand): Do add an
906
        operand for may-aliased variables before computing
907
        aliases.
908
 
909
2004-03-11  Zdenek Dvorak  
910
 
911
        * tree-optimize.c (init_tree_optimization_passes): Move
912
        pass_tail_recursion and pass_ch after pass_may_alias.
913
        * tree-ssa-loop.c (mark_defs_for_rewrite): Mark type tags
914
        for rewriting.
915
        * tree-ssa.c (mark_def_sites): Process the operand of a
916
        VDEF before the result.
917
 
918
2004-03-11  Richard Henderson  
919
 
920
        PR 14204
921
        * tree-ssa.c (warn_uninit): Don't warn for hard register variables.
922
 
923
2004-03-10  Richard Henderson  
924
 
925
        * tree-simple.c (get_base_var, get_base_decl): Remove.
926
        * tree-simple.h: Likewise.
927
        * tree-dfa.c (discover_nonconstant_array_refs_r): Use get_base_address.
928
        * tree-ssa-alias.c (ptr_is_dereferenced_by): Likewise.
929
        (add_pointed_to_var, is_escape_site): Likewise.
930
        * tree-ssa-ccp.c (get_default_value): Expect only SSA_NAME and DECLs.
931
        * tree-ssa-operands.c (add_stmt_operand): Likewise.
932
        (note_addressable): Use get_base_address.
933
        * tree-ssa-dce.c (need_to_preserve_store): Expect only SSA_NAME.
934
        * tree-ssa.c (set_is_used): Inline get_base_decl.
935
 
936
2004-03-10  Richard Henderson  
937
 
938
        * tree-nested.c (convert_nonlocal_reference): Clear TREE_INVARIANT
939
        on modified ADDR_EXPRs.
940
 
941
2004-03-10  Andrew Pinski  
942
 
943
        PR c/14475
944
        * c-decl.c (check_bitfield_type_and_width): Check for null
945
        lang_type_specific when check the precision of an enum.
946
 
947
2004-03-09  Andrew Pinski  
948
 
949
        * Makefile.in (tree-ssa-forwprop.o): Fix the dependences.
950
 
951
2004-03-09  Jeff Law  
952
 
953
        * tree-flow-inline.h (may_propagate_copy): Do not allow propagation of
954
        a constant for a virtual operand.
955
 
956
2004-03-08  Richard Henderson 
957
 
958
        * calls.c (initialize_argument_information): Add
959
        parameter may_tail_call.  Set to false for invisible
960
        pass-by-reference arguments that require stack
961
        allocation.
962
        Update all users.
963
 
964
2004-03-07  Jeff Law  
965
 
966
        * tree-ssa-dom.c: (get_eq_expr_value): Fix typo when comparing a
967
        boolean against a constant.
968
        * tree-ssa-forwprop.c (record_single_argument_cond_exprs): Do not
969
        record the same SSA_NAME more than once.  Only record the SSA_NAME
970
        tested, not the COND_EXPR.
971
        (substitute_single_use_vars): Substitute booleans which are
972
        set from a TRUTH_NOT_EXPR even if they have more than one use site.
973
 
974
2004-03-05  Jeff Law  
975
 
976
        * tree-ssa-dce.c (remove_dead_stmt): Clear PENDING_STMT after
977
        redirect_edge_and_branch call.
978
 
979
        * tree-ssa-forwprop.c (record_single_argument_cond_exprs): Also
980
        record COND_EXPRs with single use vars defined by SSA_NAME + CONST
981
        expressions.
982
        (substitute_single_use_vars): Corresponding changes to rewrite
983
        COND_EXPRs using single use vars defined by SSA_NAME + CONST
984
        expressions.
985
 
986
2004-03-05  Ulrich Weigand  
987
 
988
        * config/s390/s390.c (s390_expand_movstr): Do not use
989
        expand_exit_loop_top_cond, manually copy loop header.
990
        (s390_expand_clrstr): Likewise.
991
        (s390_expand_cmpmem): Likewise.
992
 
993
2004-03-04  Diego Novillo  
994
 
995
        * tree-ssa-alias.c (compute_flow_sensitive_aliasing): If
996
        a name tag has been marked call-clobbered, also mark the
997
        corresponding type tag.
998
 
999
2004-03-04  Zdenek Dvorak  
1000
 
1001
        * tree-ssa-loop-live.c (coalesce_tpa_members): Update the root
1002
        variable of the partition.
1003
 
1004
2004-03-04  Jeff Law  
1005
 
1006
        * tree-ssa-dce.c (remove_dead_stmt): Redirect an existing edge
1007
        rather than deleting the old ones and creating a new one when
1008
        removing a dead conditional.
1009
 
1010
        * fold-const.c (fold): When rebuilding the expression after a
1011
        call to fold_relational_hi_lo, make sure to convert the type of
1012
        the second argument to the type of the first.
1013
 
1014
2004-03-04  Diego Novillo  
1015
 
1016
        * cgraphunit.c (cgraph_optimize): Do not do memory release
1017
        check if there have been errors.
1018
 
1019
2004-03-03  Jeff Law  
1020
 
1021
        * tree-ssa-phiopt.c (conditional_replacement): Clear EDGE_TRUE_VALUE
1022
        and EDGE_FALSE_VALUE on the remaining edge after eliminating a PHI.
1023
 
1024
2004-03-03  Andrew MacLeod  
1025
 
1026
        * tree-ssa-copyrename.c (gate_copyrename): Really check it in.
1027
        * tree-ssa.c (create_temp): Use DECL_ARTIFICIAL from original decl.
1028
 
1029
2004-03-02  Zdenek Dvorak  
1030
 
1031
        * tree-tailcall.c (struct tailcall): Remove return_block and return_bsi
1032
        fields, add m and a fields.
1033
        (m_acc, a_acc): New.
1034
        (find_tail_calls): Find tail calls on whose results simple operations
1035
        are performed.
1036
        (independent_on_stmt_p, process_assignment,
1037
        propagate_through_phis, adjust_accumulator_values,
1038
        adjust_return_value): New.
1039
        (eliminate_tail_call): Update the accumulators if needed.
1040
        (optimize_tail_call): Do not create phis.
1041
        (tree_optimize_tail_calls): Create phis and accumulators as needed.
1042
        Adjust return values.
1043
 
1044
2004-03-02  Diego Novillo  
1045
 
1046
        * tree-ssa-operands.c (get_expr_operands): Mark CALL_EXPRs
1047
        with has_volatile_ops if aliases haven't been computed yet.
1048
        (add_stmt_operand): Use 'true' instead of '1'.
1049
 
1050
2004-03-02  Diego Novillo  
1051
 
1052
        PR optimization/14266
1053
        * tree-ssa-alias.c (create_global_var): Mark GLOBAL_VAR for
1054
        renaming.
1055
 
1056
2004-03-01  Richard Henderson  
1057
 
1058
        * tree.c (associative_tree_code): Remove MINUS_EXPR, LSHIFT_EXPR,
1059
        RSHIFT_EXPR.
1060
        * tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): Use
1061
        is_gimple_min_invariant and is_gimple_var.  Handle minus_expr
1062
        specially.
1063
 
1064
2004-03-01  Richard Henderson  
1065
 
1066
        * cfgbuild.c (rtl_make_eh_edge): Rename from make_eh_edge.
1067
        * basic-block.h, except.c: Update decl and uses.
1068
 
1069
2004-03-01  Frank Ch. Eigler  
1070
 
1071
        * doc/passes.texi: Add information about mudflap.
1072
 
1073
2004-03-01  Andrew Pinski  
1074
 
1075
        PR middle-end/13066
1076
        * fold-const (fold): Call fold_convert when building
1077
        a TRUTH_*_EXPR tree.
1078
 
1079
2004-03-01  Andrew MacLeod  
1080
 
1081
        * common.opt : Add tree-copyrename option. Remove duplicate tree-sra.
1082
        * flags.h (flag_tree_copyrename): Declare.
1083
        * opts.c (decode_options): Turn copyrename on by default at -O.
1084
        (common_handle_option): Handle -ftree-copyrename.
1085
        * toplev.c (flag_tree_copyrename): Declare.
1086
        * tree-ssa-copyrename.c (gate_copyrename): New.  Check flag.
1087
        (pass_rename_ssa_copies): Initialize with gated routine.
1088
        (lang_independent_options f_): Add tree-copyrename.
1089
        * doc/invoke.texi: Add -fdump-tree-copyrename and  -ftree-copyrename.
1090
        * doc/passes.texi: Add blurb for copy renaming.
1091
 
1092
2004-03-01  Jeff Law  
1093
 
1094
        * tree-ssa-dom.c (true_false_expr_hash): Update comments slightly.
1095
        (true_false_expr_eq): Update comments slightly.  Avoid using
1096
        operand_equal_p, instead check the code and operands directly.
1097
 
1098
2004-03-01  Andrew MacLeod  
1099
 
1100
        * Makefile.in (tree-ssa-copyrename.o): New object.
1101
        * timevar.def (TV_TREE_COPY_RENAME): New time variable.
1102
        * tree-optimize.c (init_tree_optimization_passes): Add copy rename
1103
        pass.
1104
        * tree-pass.h (pass_rename_ssa_copies): New pass structure.
1105
        * tree-sra.c (lookup_scalar): Copy DECL_ARITIFICIAL flag from base.
1106
        * tree-ssa-copyrename.c : New file.
1107
        (copy_rename_partition_coalesce): Coalesce partitions for renaming.
1108
        (rename_ssa_copies): Find renamable copies.
1109
        (pass_rename_ssa_copies): Initialize.
1110
        * tree-ssa-live.c (register_ssa_partition): Move to tree-ssa-live.h.
1111
        * tree-ssa-live.h (register_ssa_partition): Moved from tree-ssa-live.c.
1112
 
1113
2004-02-29  David Edelsohn  
1114
 
1115
        * doloop.c (doloop_optimize): Increment n_iterations if loop->top
1116
        present.
1117
 
1118
2004-02-29  Diego Novillo  
1119
 
1120
        * gimple-low.c (pass_remove_useless_vars): Add TODO_dump_func.
1121
 
1122
2004-02-27  Richard Henderson  
1123
 
1124
        PR middle-end/14310
1125
        * explow.c (emit_stack_save): Remove savearea mode check.
1126
 
1127
2004-02-27  Richard Henderson  
1128
 
1129
        * builtins.c (simplify_builtin_strcmp): Don't export.  Remove
1130
        length parameters.  Remove conversion to memcmp.
1131
        (simplify_builtin_strncmp): Likewise.
1132
        * expr.h: Don't declare them.
1133
        * tree-ssa-ccp.c (ccp_fold_builtin): Don't call them.
1134
 
1135
2004-02-27  Dale Johannesen  
1136
 
1137
        * tree-cfg.c (cleanup_control_expr_graph): Prevent edge
1138
        probability from overflowing due to roundoff errors.
1139
 
1140
2004-02-27  Jeff Law  
1141
 
1142
        * tree-cfg.c (verify_expr): Do not walk down into types.
1143
        Expand checking to verify that unary/binary operators have
1144
        gimple operands.
1145
        * tree-ssa-ccp.c (ccp_fold_builtin, case BUILT_IN_STRLEN): Do not
1146
        create non-gimple code.  Similarly for BUILTIN_IN_STRCPY and
1147
        BUILT_IN_STRNCPY.
1148
        * tree-ssa-phiopt.c (conditional_replacement): Do not create
1149
        non-gimple code.
1150
        * tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): Likewise.
1151
 
1152
        * tree-simple.c (is_gimple_min_invariant): Subtraction of a
1153
        constant from a constant pointer is a gimple invariant as well.
1154
        * tree-ssa-operands.c (get_expr_operands): Handle subtraction
1155
        of a constant from a constant pointer too.
1156
 
1157
        * fold-const.c (fold): Tighten test for optimizing an equality
1158
        comparison of the address of two variables.
1159
 
1160
        * tree-inline.c (setup_one_parameter): Improve test for when we
1161
        need to gimplify the initialization statements.
1162
 
1163
2004-02-27  Diego Novillo  
1164
 
1165
        PR optimization/14312
1166
        * tree-pretty-print.c (dump_generic_node): Mark tail calls.
1167
        * tree-ssa-alias.c (compute_may_aliases): Restore call to
1168
        dump_referenced_vars.
1169
        (compute_points_to_and_addr_escape): If the address of a
1170
        variable V is stored into a non-pointer variable, mark V as
1171
        call-clobbered.
1172
        * tree-tailcall.c (suitable_for_tail_opt_p): Check for
1173
        call-clobbered instead of TREE_ADDRESSABLE.
1174
        Ignore memory tags.
1175
        (optimize_tail_call): Add newline to dump output.
1176
 
1177
2004-02-27  Diego Novillo  
1178
 
1179
        PR optimization/13347
1180
        * tree-sra.c (scalarize_structure_assignment): Use STRIP_NOPS
1181
        instead of STRIP_USELESS_TYPE_CONVERSION to remove type casts
1182
        from RHS of the assignment.
1183
 
1184
        * tree-ssa.c (tree_ssa_useless_type_conversion_1): Reformat
1185
        and rephrase comments.
1186
        * tree.h (STRIP_USELESS_TYPE_CONVERSION): Reformat comment.
1187
 
1188
2004-02-26  Zdenek Dvorak  
1189
 
1190
        * tree-cfg.c (tree_redirect_edge_and_branch_1): Allow to redirect
1191
        RETURN_EXPR branches.
1192
 
1193
2004-02-26  Jeff Law  
1194
 
1195
        * tree-nrv.c (tree_nrv): Only perform NRV optimization when the
1196
        return value lives in memory.
1197
 
1198
        * tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): If an
1199
        operand is unsigned, then we can eliminate more ABS expressions
1200
        and turned div/mod expression into shift/and expressions.
1201
 
1202
        * fold-const.c (fold): An equality comparison of the address of
1203
        two non-weak variables has known compile-time result.
1204
 
1205
2004-02-26  Andrew Pinski  
1206
 
1207
        * tree-ssa-phiopt.c (conditional_replacement):
1208
        s/tree_dump_flags/dump_flags/.
1209
 
1210
        * tree-ssa-phiopt.c (tree_ssa_phiopt): Split into ...
1211
        (conditional_replacement): Here.
1212
 
1213
2004-02-26  Andrew MacLeod  
1214
 
1215
        * tree-ssa.c (find_replaceable_in_bb): Don't repalce expressions in
1216
        volatile statements.
1217
 
1218
2004-02-25  Richard Henderson  
1219
 
1220
        PR opt/14288
1221
        * gimplify.c (gimple_push_cleanup): Add VAR argument.  Set
1222
        TREE_NO_WARNING if in a conditional context.
1223
        (gimplify_target_expr): Pass new argument.
1224
        * tree-sra.c (lookup_scalar): Copy TREE_NO_WARNING to replacement.
1225
 
1226
2004-02-24  Kazu Hirata  
1227
 
1228
        * doc/invoke.texi: Replace -fdump-tree-all-ssa with
1229
        -fdump-tree-all.
1230
 
1231
2004-02-24  Kazu Hirata  
1232
 
1233
        PR target/14285
1234
        * config/arm/arm.c (arm_compute_func_type): Replace
1235
        "current_function_needs_context" with "cfun->static_chain_decl
1236
        != NULL".
1237
        (arm_compute_initial_elimination_offset): Likewise.
1238
        * config/h8300/h8300.c (h8300_emit_stack_adjustment):
1239
        Likewise.
1240
        * config/sh/sh.c (output_stack_adjust): Likewise.
1241
        (sh5_schedule_saves): Likewise.
1242
        * config/xtensa/xtensa.c (compute_frame_size): Likewise.
1243
 
1244
2004-02-24  Richard Henderson  
1245
 
1246
        * c-simplify.c (c_genericize): s/dump_flags/local_dump_flags/.
1247
        * predict.c, tree-alias-ander.c, tree-cfg.c, tree-nrv.c,
1248
        tree-optimize.c, tree-pass.h, tree-sra.c, tree-ssa-alias.c,
1249
        tree-ssa-ccp.c, tree-ssa-copy.c, tree-ssa-dce.c, tree-ssa-dom.c,
1250
        tree-ssa-dse.c, tree-ssa-forwprop.c, tree-ssa-loop.c,
1251
        tree-ssa-phiopt.c, tree-ssa-pre.c, tree-ssa.c, tree-tailcall.c:
1252
        s/tree_dump_flags/dump_flags/.
1253
 
1254
2004-02-24  Richard Henderson  
1255
 
1256
        * predict.c, tree-alias-ander.c, tree-cfg.c, tree-mudflap.c,
1257
        tree-nrv.c, tree-optimize.c, tree-pass.h, tree-profile.c, tree-sra.c,
1258
        tree-ssa-alias.c, tree-ssa-ccp.c, tree-ssa-copy.c, tree-ssa-dce.c,
1259
        tree-ssa-dom.c, tree-ssa-dse.c, tree-ssa-forwprop.c, tree-ssa-loop.c,
1260
        tree-ssa-operands.c, tree-ssa-phiopt.c, tree-ssa-pre.c, tree-ssa.c,
1261
        tree-tailcall.c: s/tree_dump_file/dump_file/g.
1262
 
1263
2004-02-24  Diego Novillo  
1264
 
1265
        * doc/tree-ssa.texi: Fix formatting mark ups.
1266
 
1267
2004-02-24  Jeff Law  
1268
 
1269
        * gimple-low.c (remove_useless_vars): Now static.
1270
        (pass_remove_useless_vars): New.
1271
        * tree-flow.h (remove_useless_vars): Remove prototype.
1272
        * tree-nrv.c (struct nrv_data): Remove visited hashtable.
1273
        (finalize_nrv_r): Do not descend into types. No need to update
1274
        the visited hashtable.
1275
        (tree_nrv): No need to allocate/free the visited hashtable.
1276
        Clear the used flag on the variable's annotation.
1277
        * tree-optimize.c (init_tree_optimizatio_passes): Link in
1278
        pass_remove_useless_vars.
1279
        * tree-pass.h (pass_remove_useless_vars): Declare.
1280
        * tree-ssa.c (rewrite_out_of_ssa): Do not remove useless vars here.
1281
 
1282
        * Makefile.in (OBJS-common): Add tree-nrv.o.
1283
        (tree-nrv.o): Add dependencies.
1284
        * timevar.def (TV_TREE_NRV): New timevar.
1285
        * tree-nrv.c: New file implementing NRV on generic trees.
1286
        * tree-optimize.c (init_tree_optimization_passes): Link in
1287
        tree_nrv optimization pass.
1288
        * tree-pass.h (tree_nrv): Declare.
1289
        * doc/invoke.texi: Add -fdump-tree-nrv documentation.
1290
 
1291
2004-02-24  Sebastian Pop  
1292
 
1293
        * tree-flow.h (walk_use_def_chains_fn): Return a boolean.
1294
        True for stopping the use-def walk, false otherwise.
1295
        * tree-ssa-alias.c (collect_points_to_info_r): Same.
1296
        Always return false, and never stopping the def-use walk as before.
1297
        * tree-ssa.c (walk_use_def_chains_1): Stop when the result of the
1298
        callback function is true.
1299
        * doc/tree-ssa.texi: Document the behavior of the callback
1300
        function for walk_use_def_chains.
1301
 
1302
2004-02-24  Richard Henderson  
1303
 
1304
        * doc/passes.texi: Rewrite.
1305
 
1306
2004-02-23  Diego Novillo  
1307
 
1308
        * Makefile.in (TEXI_GCCINT_FILES): Add cfg.texi and tree-ssa.texi
1309
        * tree-ssa-alias.c (compute_may_aliases): Update documentation.
1310
        * doc/gccint.texi: Add node for Tree SSA documentation.
1311
        Include tree-ssa.texi.
1312
        * doc/tree-ssa.texi: New file.
1313
 
1314
2004-02-23  Dale Johannesen 
1315
 
1316
        * config/rs6000/rs6000.md:  Roll in changes from mainline:
1317
        (movdf_softfloat64):  Add POWER form of nop.
1318
        (movsf_hardfloat): Ditto, and accept CTR-to-CTR copy.
1319
        (movdf_hardfloat64):  Ditto.
1320
 
1321
2004-02-23  Jeff Law  
1322
 
1323
        * ggc-page.c (struct page_entry): New field PREV.
1324
        (ggc_alloc): Update PREV field appropriately.
1325
        (sweep_pages): Likewise.
1326
        (ggc_free): Likewise.  Use PREV field rather than loop to
1327
        improve ggc_free performance.
1328
 
1329
        * Makefile.in (OBJC-common): Add tree-ssa-copy.o.
1330
        (tree-ssa-copy.o): Add dependencies.
1331
        * tree-flow.h (propagate_value, replace_exp): Prototype.
1332
        (cprop_into_stmt, cprop_into_successor_phis): Likewise.
1333
        * tree-ssa-copy.c: New file, most functions copied from tree-ssa-dom.c
1334
        (cprop_into_stmt): Handle pointer & reference types better.
1335
        * tree-ssa-dom.c (opt_stats_d): Kill uninteresting stats.
1336
        (dump_dominator_optimization_stats): Corresponding changes.
1337
        (cprop_into_stmt): Moved into tree-ssa-copy.c.
1338
        (propagate_value): Likewise.
1339
        (cprop_into_phis): Simplify using code fromi tree-ssa-copy.c.
1340
        (optimize_stmt): Pass additional argument to cprop_into_stmt.
1341
        * tree-ssa-pre.c (generate_expr_as_of_bb): Use replace_exp.
1342
        (generate_vops_as_of_bb): Similarly.
1343
 
1344
2004-02-21  Jan Hubicka  
1345
 
1346
        * cgraphunit.c (decide_is_function_needed): Nested functions of extern
1347
        inline functions don't need to be output.
1348
        (expand_function): Re-enable sanity check.
1349
 
1350
2004-02-21  Zdenek Dvorak  
1351
 
1352
        * tree-ssa-loop.c (do_while_loop_p): New function.
1353
        (copy_loop_headers): Do not peel do-while loops.
1354
 
1355
2004-02-21  Jan Hubicka  
1356
 
1357
        * tree-cfg.c (cleanup_control_expr_graph): Update profile.
1358
 
1359
        * tree-cfg.c (disband_implicit_edges): Set fallthru edges correctly.
1360
 
1361
        * cfg.c (dump_flow_info): Work on trees too.
1362
 
1363
        * tree-pretty-print.c (dump_generic_bb_stuff):  Do not touch bb
1364
        annotations when not allocated.
1365
 
1366
2004-02-21  Jeff Law  
1367
 
1368
        * tree-ssa-dom.c (cprop_into_stmt): Look at the type's main variant
1369
        to determine if the two operands of a copy have equivalent types.
1370
 
1371
2004-02-20  Jeff Law  
1372
 
1373
        * tree-flow-inline.h (may_propagate_copy): Do not perform ABNORMAL_PHI
1374
        and DECL_HARD_REGISTER tests on virtual operands.
1375
        * tree-flow.h (propagate_copy): Kill prototype.
1376
        (propagate_value): New prototype.
1377
        * tree-ssa-dom.c (propagate_copy): Now static.
1378
        (propagate_value): No longer static.
1379
 
1380
2004-02-20  Richard Henderson  
1381
 
1382
        PR middle-end/14218
1383
        * c-simplify.c (mark_labels_r): Move to ...
1384
        * gimplify.c (force_labels_r): ... here, and rename.
1385
        (gimplify_init_constructor): Invoke it.
1386
        * tree-simple.h (force_labels_r): Declare.
1387
 
1388
2004-02-20  Richard Henderson  
1389
 
1390
        PR opt/14194
1391
        * tree-ssa-ccp.c (substitute_and_fold): Also mark new vars
1392
        if fold_stmt was successful.
1393
 
1394
2004-02-20  Diego Novillo  
1395
 
1396
        * doc/invoke.texi: Add documentation for parameters
1397
        global-var-threshold and max-aliased-vops.
1398
        * params.def (PARAM_GLOBAL_VAR_THRESHOLD): Reformat help message.
1399
        (PARAM_MAX_ALIASED_VOPS): Rename from PARAM_MAX_ALIAS_SET_SIZE.
1400
        * params.h (MAX_ALIASED_VOPS): Rename from MAX_ALIAS_SET_SIZE.
1401
        Update all users.
1402
        * tree-ssa-alias.c (struct alias_map_d): Document fields.
1403
        Add fields total_alias_vops, grouped_p and may_aliases.
1404
        (struct alias_info): Change fields addressable_vars and
1405
        pointers to malloc'd arrays.  Update all users.
1406
        Add fields num_references and total_alias_vops.
1407
        (compute_may_aliases): Add more comments.
1408
        (init_alias_info): Initialize new fields in struct alias_info.
1409
        (delete_alias_info): Corresponding changes.
1410
        (compute_points_to_and_addr_escape): Count references to
1411
        potentially aliased variables and pointer dereferences.
1412
        (compute_flow_insensitive_aliasing): Remove old grouping
1413
        heuristic.
1414
        Count the number of virtual operands induced by all the alias
1415
        sets created and call group_aliases if the number exceeds the
1416
        threshold set by --param max-aliased-vops.
1417
        (total_alias_vops_cmp): New.
1418
        (group_aliases_into): New.
1419
        (group_aliases): New.
1420
        * tree-ssa-operands.c (get_expr_operands): Change dump file
1421
        message when no flow-sensitive alias information is available.
1422
        (add_stmt_operand): Reformat comment.
1423
        * tree-ssa.c (init_tree_ssa): Don't call bitmap_clear.
1424
 
1425
        * tree-simple.c (get_base_decl): Fix typo in comment.
1426
 
1427
        * tree-pretty-print.c (print_call_name): Handle matrices of
1428
        function pointers.
1429
 
1430
2004-02-20  Zdenek Dvorak  
1431
 
1432
        * Makefile.in (tree-ssa-loop.o): Add tree-inline.h dependency.
1433
        * basic-block.h (struct reorder_block_def): Moved from cfglayout.h.
1434
        (alloc_rbi_pool, initialize_bb_rbi, free_rbi_pool): New.
1435
        * bb-reorder.c (copy_bb): Use cfghooks for bb duplication.
1436
        * cfg.c (rbi_pool): New variable.
1437
        (alloc_rbi_pool, free_rbi_pool, initialize_bb_rbi): New functions.
1438
        * cfghooks.c (can_duplicate_block_p, duplicate_block): New functions.
1439
        * cfghooks.h (struct cfg_hooks): Add can_duplicate_block_p and
1440
        duplicate_block hooks.
1441
        (can_duplicate_block_p, duplicate_block): Declare.
1442
        * cfglayout.c (cfg_layout_pool, cfg_layout_initialize_rbi): Removed.
1443
        (fixup_reorder_chain): Use initialize_bb_rbi.
1444
        (cfg_layout_can_duplicate_bb_p, cfg_layout_duplicate_bb): Hookized.
1445
        (cfg_layout_initialize): Use cfg.c rbi pool manipulation functions.
1446
        (can_copy_bbs_p, copy_bbs): Use cfghooks for bb duplication.
1447
        * cfglayout.h (typedef struct reorder_block_def): Moved to
1448
        basic_block.h.
1449
        (cfg_layout_can_duplicate_bb_p, cfg_layout_duplicate_bb): Declaration
1450
        removed.
1451
        * cfgrtl.c (cfg_layout_create_basic_block): Use initialize_bb_rbi.
1452
        (rtl_cfg_hooks, cfg_layout_rtl_cfg_hook): Fill in can_duplicate_block_p
1453
        and duplicate_block fields.
1454
        * common.opt (ftree-ch): Add.
1455
        * flags.h (flag_tree_ch): Declare.
1456
        * jump.c (next_nonnote_insn_in_loop, duplicate_loop_exit_test,
1457
        copy_loop_headers): Removed.
1458
        * loop-unswitch.c (unswitch_loop): Use cfghooks for bb duplication.
1459
        * opts.c (decode_options): Enable flag_tree_ch at -O1.
1460
        (common_handle_option): Handle -ftree_ch.
1461
        * rtl.h (copy_loop_headers): Declaration removed.
1462
        * timevar.def (TV_TREE_CH): New.
1463
        * toplev.c (flag_tree_ch): New.
1464
        (rest_of_compilation): Do not call copy_loop_headers.
1465
        * tracer.c (tail_duplicate): Use cfghooks for bb duplication.
1466
        * tree-cfg.c (build_tree_cfg): Call alloc_rbi_pool.
1467
        (create_bb): Call initialize_bb_rbi.
1468
        (delete_tree_cfg): Call free_rbi_pool.
1469
        (tree_duplicate_bb): Hookize.
1470
        (tree_can_duplicate_bb_p): New.
1471
        (tree_cfg_hooks): Fill in can_duplicate_block_p and duplicate_block
1472
        fields.
1473
        * tree-flow.h (tree_duplicate_bb): Declaration removed.
1474
        * tree-optimize.c (init_tree_optimization_passes): Add pass_ch.
1475
        * tree-pass.h (pass_ch): Declare.
1476
        * tree-ssa-loop.c: Include tree-inline.h.
1477
        (call_expr_p, should_duplicate_loop_header_p, mark_defs_for_rewrite,
1478
        duplicate_blocks, copy_loop_headers, gate_ch): New functions.
1479
        (pass_ch): New.
1480
        * doc/invoke.texi (-fdump-tree-ch, -ftree-ch): Document.
1481
 
1482
2004-02-19  David Edelsohn  
1483
 
1484
        * config/rs6000/aix.h (MFWRAP_SPEC): Define.
1485
        (MFLIB_SPEC): Define.
1486
 
1487
2004-02-19  Jeff Law  
1488
 
1489
        * tree-ssa-phiopt.c (tree_ssa_phiopt): TRUTH_NOT_EXPR is valid
1490
        gimple code.
1491
 
1492
2004-02-19  Steven Bosscher  
1493
 
1494
        * tree-cfg.c (cleanup_dead_labels): New function to remove
1495
        redundant labels.
1496
 
1497
        Remove the RTL inliner.
1498
        * calls.c (try_to_integrate): Remove.
1499
        (expand_call): Do not try to expand calls inline.
1500
        * dbxout.c (dbxout_symbol_location): Don't mention integrate.c
1501
        in comments.
1502
        * expmed.c (extract_fixed_bit_field): Always propagate the
1503
        target for the shift if it is a REG.
1504
        * expr.c (emit_move_insn_1): Don't generate inline warnings.
1505
        (expand_expr_real_1): Don't look at inline_function_decl.
1506
        Don't output inlined functions here.
1507
        * expr.h (expand_inline_function): Remove prototype.
1508
        * emit-rtl.c (copy_most_rtx): Don't copy the integrated flag.
1509
        Copy the new return_val flag.
1510
        * final.c (final): Don't look at RTX_INTEGRATED_P.
1511
        * cfgrtl.c (create_basic_block_structure): Likewise.
1512
        * haifa-sched.c (priority): Likewise.
1513
        (restore_line_notes): Likewise.
1514
        * function.c (inline_function_decl): Remove.
1515
        (put_var_into_stack): Don't use it.
1516
        (fix_lexical_addr): Likewise.
1517
        * function.c (inline_function_decl): Remove extern declaration.
1518
        * genattrtab.c (ATTR_PERMANENT_P): Use the return_val flag
1519
        instead of the integrated flag.
1520
        * integrate.c (INTEGRATE_THRESHOLD): Remove.
1521
        (setup_initial_hard_reg_value_integration): Likewise.
1522
        (initialize_for_inline): Likewise.
1523
        (note_modified_parmregs): Likewise.
1524
        (integrate_parm_decls): Likewise.
1525
        (process_reg_param): Likewise.
1526
        (save_parm_insns): Likewise.
1527
        (copy_insn_list): Likewise.
1528
        (copy_insn_notes): Likewise.
1529
        (compare_blocks): Likewise.
1530
        (find_block): Likewise.
1531
        (inlining): Likewise.
1532
        (function_cannot_inline_p): Likewise.
1533
        (parmdecl_map): Likewise.
1534
        (in_nonparam_insns): Likewise.
1535
        (save_for_inline): Likewise.
1536
        (FIXED_BASE_PLUS): Likewise.
1537
        (expand_inline_function): Likewise.
1538
        (copy_rtx_and_substitute): Don't look at map->integrating,
1539
        map->inline_target, and inlining, since we are never copying
1540
        for integrating.
1541
        Don't abort on RTX_INTEGRATED_P.
1542
        (old_fun): Remove.
1543
        (output_inline_function): Remove.
1544
        * integrate.h (struct inline_map): Remove fields integrating,
1545
        block_map, leaf_reg_map, inline_target, and local_return_label.
1546
        * print-rtl.c (print_rtx): Don't print the integrated flag.
1547
        Print the return_val flag.
1548
        * rtl.h (struct rtx_def): Replace the integrated flag with the
1549
        return_val flag.
1550
        (RTX_INTEGRATED_P): Remove.
1551
        (notice_rtl_inlining_of_deferred_constant): Remove prototype.
1552
        * stmt.c (force_label_rtx): Don't look at inline_function_decl.
1553
        * toplev.c (rest_of_handle_inlining): Remove.
1554
        (rest_of_compilation): Don't call it, and never jump to exit.
1555
        Call convert_from_eh_region_ranges.
1556
        (wrapup_global_declarations): Don't output nested inlined functions.
1557
        * tree.h (function_cannot_inline_p): Remove prototype.
1558
        (save_for_inline): Ditto.
1559
        (output_inline_function): Ditto.
1560
        * unroll.c (unroll_loop): Don't clear map->inline_target.
1561
        * varasm.c (notice_rtl_inlining_of_deferred_constant): Remove.
1562
 
1563
        * system.h: Poison INTEGRATE_THRESHOLD.
1564
        * config/avr/avr.h: Remove define.
1565
        * config/ip2k/ip2k.h: Likewise.
1566
 
1567
        * unwind-sjlj.c (uw_install_context): Make a proper static inline
1568
        function.
1569
 
1570
        * doc/rtl.texi: Remove references to the integrated flag.
1571
        * doc/tm.texi: Remove documentation of INTEGRATE_THRESHOLD.
1572
 
1573
2004-02-17  Andrew Macleod  
1574
 
1575
        * tree-ssa-live.c (coalesce_tpa_members): Don't coalesce partitions
1576
        which are not in the same TPA group.
1577
        * tree-ssa.c (rewrite_out_of_ssa): Coalesce via list first.
1578
 
1579
2004-02-17  Brian Booth  
1580
 
1581
        * tree-ssa-ccp.c (substitute_and_fold): Update stmt after
1582
        calling fold_stmt.
1583
 
1584
2004-02-16  Andrew Pinski  
1585
 
1586
        * config/rs6000/rs6000.c (output_function_profiler): Check
1587
        cfun->static_chain_decl instead of current_function_needs_context.
1588
 
1589
2004-02-16  Jeff Law  
1590
 
1591
        * tree-ssa.dse.c (dse_optimize_stmt): Dump info when we delete
1592
        stores.
1593
 
1594
        * tree-ssa-dse.c: Update comments.
1595
 
1596
        * Makefile.in (OBJS-common): Add tree-ssa-dse.o
1597
        (tree-ssa-dse.o): Add dependencies.
1598
        * common.opt (ftree-dse): New option.
1599
        * flags.h (flag_tree_dse): New.
1600
        (flag_tree_dom): Fix comments.
1601
        * opts.c (decode_options): Turn on flag_tree_dse.
1602
        (common_handle_option): Handle  OPT_ftree_dse.
1603
        * timevar.def (TV_TREE_PHIOPT): Update text.
1604
        (TV_TREE_DSE): New timevar.
1605
        * toplev.c (flag_tree_dse): New.
1606
        (flag_tree_dom): Fix comments.
1607
        (lang_independent_options): Add -ftree-dse.
1608
        * tree-dfa.c (redirect_immediate_use): New function.
1609
        (redirect_immediate_uses): New function.
1610
        * tree-flow.h (stmt_ann_d): Add UID field.
1611
        (redirect_immediate_uses): Declare.
1612
        * tree-optimize.c (init_tree_optimization_passes): Link in DSE pass.
1613
        * tree-pass.h (pass_dse): Declare.
1614
        * tree-ssa-dse.c: New file implementing DSE.
1615
        * doc/invoke.texi: Document new option.
1616
 
1617
2004-02-16  Richard Henderson  
1618
 
1619
        * tree-nested.c: New file.
1620
        * Makefile.in (OBJS-common, GTFILES, tree-nested.o): Add it.
1621
        * builtin-types.def (BT_FN_VOID_PTR_PTR, BT_FN_VOID_PTR_PTR_PTR): New.
1622
        * builtins.c (expand_builtin_nonlocal_goto): New.
1623
        (expand_builtin_apply): Fix prepare_call_address args.
1624
        (round_trampoline_addr): Move from function.c.
1625
        (expand_builtin_init_trampoline): New.
1626
        (expand_builtin_adjust_trampoline): New.
1627
        (expand_builtin): Invoke them.
1628
        (build_function_call_expr): Add CALL_EXPR chain operand.
1629
        * builtins.def (BUILT_IN_INIT_TRAMPOLINE,
1630
        BUILT_IN_ADJUST_TRAMPOLINE, BUILT_IN_NONLOCAL_GOTO): New.
1631
        * c-decl.c (finish_function): Call lower_nested_functions.
1632
        (c_expand_decl): Don't declare_nonlocal_label.
1633
        * calls.c (prepare_call_address): Replace fndecl arg with a
1634
        precomputed static chain value.
1635
        (expand_call): Precompute the static chain value.  Use
1636
        update_nonlocal_goto_save_area.
1637
        * cgraph.c (cgraph_mark_reachable_node): Don't force nested
1638
        functions to be reachable.
1639
        (cgraph_clone_node): Don't abort cloning functions containing
1640
        nested functions.
1641
        * cgraphunit.c (cgraph_assemble_pending_functions): Don't do
1642
        anything special for nested functions.
1643
        (cgraph_mark_functions_to_output): Likewise.
1644
        (cgraph_estimate_growth, cgraph_clone_inlined_nodes): Likewise.
1645
        (cgraph_optimize): Likewise.
1646
        (cgraph_finalize_function): Don't zap DECL_SAVED_INSNS.
1647
        (cgraph_expand_function): Allow functions to not be emitted.
1648
        * defaults.h (TRAMPOLINE_ALIGNMENT): Move from function.c.
1649
        * dwarf2out.c (gen_subprogram_die): Generate DW_AT_static_link.
1650
        * emit-rtl.c (maybe_set_first_label_num): New.
1651
        * explow.c (update_nonlocal_goto_save_area): New.
1652
        (allocate_dynamic_stack_space): Use it.
1653
        * expr.c (expand_expr_real_1) : Don't force_label_rtx.
1654
        : Ignore the possibility of non-local labels.
1655
        : Don't do trampoline_address.
1656
        * expr.h (lookup_static_chain): Remove.
1657
        (prepare_call_address): Update 2nd arg.
1658
        (update_nonlocal_goto_save_area): Declare.
1659
        * final.c (profile_function): Update static chain test.
1660
        * function.c (TRAMPOLINE_ALIGNMENT): Move to defaults.h.
1661
        (trampolines_created): Move to varasm.c.
1662
        (free_after_compilation): Update for removed fields.
1663
        (allocate_struct_function): Likewise.
1664
        (delete_handlers, lookup_static_chain): Remove.
1665
        (fix_lexical_addr): Don't consider non-local variable refs.
1666
        (trampoline_address): Remove.
1667
        (round_trampoline_addr): Move to builtins.c.
1668
        (adjust_trampoline_addr): Remove.
1669
        (expand_function_start): Update for changes to static chain
1670
        and nonlocal goto handling.
1671
        (initial_trampoline): Move to varasm.c.
1672
        (expand_function_end): Don't build trampolines or kill
1673
        unreferenced nonlocal goto labels.
1674
        * function.h (struct function): Remove x_nonlocal_labels,
1675
        x_nonlocal_goto_handler_slots, x_nonlocal_goto_stack_level,
1676
        x_context_display, x_trampoline_list, needs_context.
1677
        Add static_chain_decl, nonlocal_goto_save_area.
1678
        * gimple-low.c (record_vars): Don't record functions.
1679
        * gimplify.c (declare_tmp_vars): Export.
1680
        (create_artificial_label): Set type.
1681
        (gimplify_expr): Don't consider nonlocal gotos.
1682
        * integrate.c (expand_inline_function): Kill lookup_static_chain ref.
1683
        * jump.c (any_uncondjump_p): Reject nonlocal goto.
1684
        * rtl.h (maybe_set_first_label_num): Declare.
1685
        * stmt.c (label_rtx): Set LABEL_PRESERVE_P appropriately.
1686
        (expand_label): Handle DECL_NONLOCAL and FORCED_LABEL.
1687
        (declare_nonlocal_label): Remove.
1688
        (expand_goto): Don't handle nonlocal gotos.
1689
        (expand_nl_handler_label): Remove.
1690
        (expand_nl_goto_receivers): Remove.
1691
        (expand_end_bindings): Don't expand_nl_goto_receivers.  Use
1692
        update_nonlocal_goto_save_area.
1693
        * tree-cfg.c (make_edges): Handle abnormal edges out of block
1694
        falling through to EXIT.
1695
        (make_ctrl_stmt_edges): Don't check GOTO_EXPR for nonlocal goto.
1696
        Handle computed goto with no destinations.
1697
        (tree_can_merge_blocks_p): Don't merge blocks with nonlocal labels.
1698
        (remove_useless_stmts_label, stmt_starts_bb_p): Likewise.
1699
        (tree_forwarder_block_p): Likewise.
1700
        (nonlocal_goto_p): Remove.
1701
        (tree_verify_flow_info): Update to match.
1702
        * tree-dump.c (dump_files): Add tree-nested.
1703
        * tree-flow.h (nonlocal_goto_p): Remove.
1704
        * tree-inline.c (setup_one_parameter): Split out from ...
1705
        (initialize_inlined_parameters): ... here.  Handle static chain.
1706
        (inline_forbidden_p_1): Update nonlocal goto check.
1707
        (expand_call_inline): Disable mysterious cgraph abort.
1708
        * tree-optimize.c (tree_rest_of_compilation): Save DECL_SAVED_INSNS.
1709
        * tree-pretty-print.c (dump_generic_node): Print static chain
1710
        and nonlocal label.
1711
        * tree-simple.h (declare_tmp_vars): Declare.
1712
        (lower_nested_functions): Declare.
1713
        * tree-ssa-dom.c (propagate_value): Avoid sharing problems.
1714
        * tree-ssa-operands.c (get_expr_operands): Walk static chain
1715
        field of call_expr.
1716
        * tree.def (CALL_EXPR): Add static chain operand.
1717
        * tree.h (NONLOCAL_LABEL): Remove.
1718
        (TDI_nested): New.
1719
        * varasm.c (TRAMPOLINE_ALIGNMENT): Remove.
1720
        (initial_trampoline): Move from function.c.
1721
        (assemble_trampoline_template): Set and return it.
1722
        (trampolines_created): Move from function.c.
1723
 
1724
2004-02-16  Steven Bosscher  
1725
 
1726
        * tree-flow.h (cleanup_control_expr_graph): Don't declare here.
1727
        * tree-cfg.c (cleanup_control_expr_graph): Make static.
1728
        (find_edge_taken_cond_expr): Return an edge if the true and false
1729
        edges of a branch lead to the same basic block.
1730
 
1731
2004-02-13  Diego Novillo  
1732
 
1733
        * tree-phinodes.c (resize_phi_node): Do not use ggc_realloc to
1734
        allocate a new PHI node.
1735
 
1736
2004-02-12  Diego Novillo  
1737
 
1738
        * tree-flow.h (kill_redundant_phi_nodes): Remove declaration.
1739
        * tree-optimize.c (init_tree_optimization_passes): Add
1740
        pass_redundant_phi after DOM and CCP.
1741
        (execute_todo): Do not call kill_redundant_phi_nodes.
1742
        * tree-pass.h (TODO_redundant_phi): Remove.
1743
        Update all users.
1744
        Adjust values for all the other TODO_* entries.
1745
        (pass_redundant_phi): Declare.
1746
        * tree-ssa.c (replace_immediate_uses): Call mark_new_vars_to_rename
1747
        if a pointer was replaced.
1748
        (kill_redundant_phi_nodes): Make static.
1749
        (pass_redundant_phi): Define.
1750
 
1751
2004-02-12  Dale Johannesen  
1752
 
1753
        * Makefile.in (OBJS-common): Add rtl-profile.o, tree-profile.o.
1754
        (profile.o): Add tree-flow.h dependency.
1755
        (rtl-profile.o): New rule.
1756
        (tree-profile.o): New rule.
1757
        (GTFILES): Add tree-profile.c, rtl-profile.c.
1758
        * basic-block.h (flow_call_edges_add): Remove.
1759
        * cfganal.c (need_fake_edge_p): Move to cfgrtl.c.
1760
        (flow_call_edges_add): Move to cfgrtl.c.
1761
        * cfghooks.c: (block_ends_with_call_p): New.
1762
        (block_ends_with_condjump_p): New.
1763
        (flow_call_edges_add): New.
1764
        * cfghooks.h: (struct cfg_hooks): add block_ends_with_call_p,
1765
        block_ends_with_condjump_p, flow_call_edges_add.
1766
        (block_ends_with_call_p): New declaration.
1767
        (block_ends_with_condjump_p): New declaration.
1768
        (flow_call_edges_add): New declaration.
1769
        * cfgrtl.c (rtl_block_ends_with_call_p): New.
1770
        (rtl_block_ends_with_condjump_p): New.
1771
        (need_fake_edge_p): Moved from cfganal.c.
1772
        (rtl_flow_call_edges_add): Moved from cfganal.c (flow_call_edges_add).
1773
        (rtl_cfg_hooks): Add rtl_block_ends_with_call_p,
1774
        rtl_block_ends_with_condjump_p, rtl_flow_call_edges_add.
1775
        (cfg_layout_rtl_cfg_hooks): Ditto.
1776
        * common.opt (ftree-based-profiling): New.
1777
        * coverage.c (tree_ctr_tables): New.
1778
        (coverage_counter_alloc): Use it.
1779
        (build_ctr_info_value): Ditto.
1780
        (coverage_counter_ref): Ditto.  Rename to rtl_coverage_counter_ref.
1781
        (tree_coverage_counter_ref): New.
1782
        * coverage.h (coverage_counter_ref): Remove declaration.
1783
        (rtl_coverage_counter_ref): New declaration.
1784
        (tree_coverage_counter_ref): New declaration.
1785
        * opts.c (OPT_ftree_based_profiling): New.
1786
        * profile.c: Include cfghooks.h, tree-flow.h.
1787
        (profile_hooks): New.
1788
        (profile_dump_file): New.
1789
        (instrument_edges): Use hooks instead of RTL-specific code.
1790
        (instrument_values): Ditto.
1791
        (get_exec_counts): Ditto.
1792
        (compute_branch_probabilities): Ditto.
1793
        (compute_value_histograms): Ditto.
1794
        (branch_prob): Ditto.
1795
        (find_spanning_tree): Ditto.
1796
        (end_branch_prob): Ditto.
1797
        (gen_edge_profiler): Move to rtl-profile.c (rtl_gen_edge_profiler).
1798
        (gen_interval_profiler): Ditto (rtl_gen_interval_profiler).
1799
        (gen_pow2_profiler): Ditto (rtl_gen_pow2_profiler).
1800
        (gen_one_value_profiler): Ditto (rtl_gen_one_value_profiler).
1801
        (tree_register_profile_hooks): New.
1802
        (rtl_register_profile_hooks): New.
1803
        * rtl-profile.c: New file.
1804
        * rtl.h (init_branch_prob): Move declaration to value-prof.h.
1805
        (end_branch_prob): Ditto.
1806
        (branch_prob): Ditto.
1807
        * toplev.c (flag_tree_based_profiling): New.
1808
        (f_options): Add -ftree-based-profiling.
1809
        (compile_file): Register rtl-based CFG and profiling hooks.
1810
        (rest_of_compilation): Do rtl-based profiling only when
1811
        !flag_tree_based_profiling.  Register rtl-based profiling hooks.
1812
        (process_options): Sorry for -ftree-based-profiling plus
1813
        -ftest-coverage or -fprofile-values.
1814
        * toplev.h (flag_tree_based_profiling): New.
1815
        * tree-cfg.c (tree_block_ends_with_call_p): New.
1816
        (tree_block_ends_with_condjump_p): New.
1817
        (need_fake_edge_p): New.
1818
        (tree_flow_call_edges_add): New (largely from flow_call_edges_add
1819
        in cfganal.c).
1820
        (tree_cfg_hooks): Add tree_block_ends_with_call_p,
1821
        tree_block_ends_with_condjump_p, tree_flow_call_edges_add.
1822
        * tree-optimize.c (init_tree_optimization_passes):
1823
        Add pass_tree_profile.
1824
        * tree-pass.h: Ditto.
1825
        * tree-profile.c: New file.
1826
        * value-prof.c (value_prof_hooks): New.
1827
        (find_values_to_profile): Rename to rtl_find_values_to_profile.
1828
        Move rtl-specific bits in from branch_prob.
1829
        (value_profile_transformations): Rename to
1830
        rtl_value_profile_transformations.
1831
        (struct value_prof_hooks): New.
1832
        (rtl_value_prof_hooks): New.
1833
        (rtl_register_value_prof_hooks): New.
1834
        (tree_find_values_to_profile): New stub.
1835
        (tree_value_profile_transformations): New stub.
1836
        (tree_value_prof_hooks): New stub.
1837
        (tree_register_value_prof_hooks): New stub.
1838
        (find_values_to_profile): New.
1839
        (value_profile_transformations): New.
1840
        * value-prof.h: Add multiple inclusion guard.
1841
        (struct histogram_value): Change rtx fields to void *.
1842
        (rtl_register_value_prof_hooks): New declaration.
1843
        (tree_register_value_prof_hooks): New declaration.
1844
        (find_values_to_profile): New declaration.
1845
        (free_profiled_values): New declaration.
1846
        (value_profile_transformations): New declaration.
1847
        (struct profile_hooks): New declaration.
1848
        (init_branch_prob): Declaration moved from rtl.h.
1849
        (branch_prob): Declaration moved from rtl.h.
1850
        (end_branch_prob): Declaration mooved from rtl.h.
1851
        (tree_register_profile_hooks): New declaration.
1852
        (rtl_register_profile_hooks): New declaration.
1853
        (tree_profile_hooks): New declaration.
1854
        (rtl_profile_hooks): New declaration.
1855
        * doc/invoke.texi: Document -ftree-based-profiling.
1856
 
1857
2004-02-12  Jeff Law  
1858
 
1859
        * domwalk.c (walk_dominator_tree): Move statement walking from
1860
        clients into here.  Walk statements in forward or backward order
1861
        as requested by the client.  Walk either the dominator tree or
1862
        the post-dominator tree as requested by the client.
1863
        * domwalk.h (dom_walk_data): Add two fields to control direction of
1864
        statement walk and dominator vs post-dominator tree walk.  Add
1865
        BSI argument to the per-statement callbacks.
1866
        * tree-ssa-dom.c (optimize_stmt): Update prototype so that it can
1867
        be directly used as a callback for the dominator tree walker.
1868
        Update stmts_to_rescan here.
1869
        (tree_ssa_dominator_optimize): Initialize new fields in the dominator
1870
        walker structure.  Use optimize_stmt instead of dom_opt_walk_stmts
1871
        for statement callback.
1872
        (dom_opt_walk_stmts): Kill.  No longer used.
1873
        * tree-ssa.c (mark_def_sites): Update prototype so that it can be
1874
        called as the per-statement callback.  No longer walk statements here.
1875
        (mark_def_sites_initialize_block): New.
1876
        (rewrite_stmt): Update prototype so that it can be called as the
1877
        per-statement callback.
1878
        (rewrite_walk_stmts): Kill.  No longer used.
1879
        (rewrite_into_ssa): Initialize new fields in the dominator walker
1880
        structure.  Use rewrite_stmt instead of rewrite_walk_stmts.  Add
1881
        mark_def_sites_initialize_block callback.
1882
 
1883
2004-02-12  Steven Bosscher  
1884
 
1885
        * doc/cfg.texi: New file.
1886
        * doc/ggcint.texi: Include it.  Add a new chapter.
1887
 
1888
2004-02-11  Jeff Law  
1889
 
1890
        * Makefile.in (OBJS-common): Add tree-ssa-forwprop.o
1891
        (tree-ssa-forwprop.o): Add dependencies.
1892
        * timevar.def (TV_TREE_FORWPROP): New timevar.
1893
        * tree-optimize.c (init_tree_optimization_passes): Link in
1894
        the forward propagation pass.
1895
        * tree-pass.h (pass_forwprop): Declare.
1896
        * tree-ssa-forwprop.c: New file with forward propagation pass.
1897
        * doc/invoke.texi: Document dump for forward propagation pass.
1898
 
1899
2004-02-11  Andrew MacLeod  
1900
 
1901
        * tree-ssa.c (rewrite_out_of_ssa): Don't use coalesce list until new
1902
        bug resolved.
1903
 
1904
2004-02-11  Andrew MacLeod  
1905
 
1906
        * tree-ssa-live.c (compare_pairs): New.  Coalesce list cost function.
1907
        (sort_coalesce_list): Use qsort() to sort list by cost.
1908
        (coalesce_tpa_members): Use correct partition representatives.  Add more
1909
        debug information.  Allow coalesce by list, root_var, or both.
1910
        (tpa_dump): Show partition index.
1911
        * tree-ssa-live.h (SSANORM_COALESCE_PARTITIONS): New flag.
1912
        (SSANORM_USE_COALESCE_LIST): New flag.
1913
        * tree-ssa.c (create_temp): Don't mark as used when created.
1914
        (coalesce_ssa_name): Create coalesce list if requested.  Add more
1915
        debug output.
1916
        (assign_vars): Add additional debug info.
1917
        (remove_ssa_form): Perform TER after assign_vars().
1918
        (rewrite_vars_out_of_ssa): Pass coalesce partitions flag to
1919
        remove_ssa_form.
1920
        (rewrite_out_of_ssa): Add coalesce list flag to remove_ssa_form call.
1921
 
1922
2004-02-10  Jeff Law  
1923
 
1924
        * Makefile.in (OBJS-common): Add tree-ssa-phiopt.o
1925
        (tree-ssa-phiopt.o): Add dependencies.
1926
        * timevar.def (TV_TREE_PHIOPT): New timevar.
1927
        * tree-cfg.c (extract_true_false_edges_from_block): Moved here from
1928
        tree-ssa-dom.c.
1929
        (tree_verify_flow_info): Use extract_true_false_edges_from_block.
1930
        * tree-flow.h (extract_true_false_edges_from_block): Declare.
1931
        * tree-ssa-dom.c (extract_true_false_edges_from_block): Moved into
1932
        tree-cfg.c.
1933
        (get_eq_expr_value): Improve type check.
1934
        * tree-optimize.c (init_tree_optimization_passes): Link in
1935
        phiopt pass.
1936
        * tree-pass.h (pass_phiopt): Declare.
1937
        * tree-ssa-phiopt.c: New file with PHI node optimization pass.
1938
        * doc/invoke.texi: Document dump for PHI node optimization.
1939
 
1940
2004-02-10  Richard Henderson  
1941
 
1942
        * tree-sra.c (lookup_scalar): Handle unnamed fields.
1943
 
1944
2004-02-10  Diego Novillo  
1945
 
1946
        * Makefile.in (OBJS-common): Add tree-ssa-alias.o.
1947
        (tree-ssa-alias.o): New rule.
1948
        (tree-ssa-operands.o): Add dependency on $(TIMEVAR_H) and tree-pass.h
1949
        (gt-tree-dfa.h): Remove.
1950
        * timevar.def (TV_TREE_OPS): Rename from unused entry TV_TREE_DFA.
1951
        * tree-ssa-alias.c: New file.
1952
        * tree-dfa.c (struct alias_stats_d, alias_stats, dump_alias_stats,
1953
        may_alias_p, add_may_alias, global_var, aliases_computed_p,
1954
        compute_may_aliases): Move to tree-ssa-alias.c.
1955
        (struct walk_state): Remove fields 'is_asm_expr' and 'num_calls'.
1956
        Update all users.
1957
        (compute_alias_sets, create_memory_tags, may_access_global_mem_p,
1958
        get_memory_tag_for, promote_call_clobbered_vars,
1959
        find_addressable_vars): Remove.
1960
        (call_clobbered_vars): Move to tree-ssa-alias.c and convert to
1961
        bitmap.
1962
        (find_referenced_vars): Move logic to create .GLOBAL_VAR to
1963
        tree-ssa-alias.c.
1964
        (create_ssa_name_ann): New.
1965
        (dump_variable): Rearrange.
1966
        (dump_dfa_stats): Do not show the number of call clobbered
1967
        variables.
1968
        (find_vars_r): Do not try to determine if an assignment my access
1969
        global memory.
1970
        (add_referenced_var): Remove hacks to establish global memory
1971
        dependencies.
1972
        If the variable needs to live in memory mark it call-clobbered.
1973
        * tree-flow-inline.h (ssa_name_ann): New.
1974
        (get_ssa_name_ann): New.
1975
        (set_may_alias_global_mem): Remove.
1976
        (may_alias_global_mem_p): Remove.
1977
        (set_may_point_to_global_mem): Remove.
1978
        (may_point_to_global_mem_p): Remove.
1979
        (is_call_clobbered): New
1980
        (mark_call_clobbered): New
1981
        (mark_non_addressable): New
1982
        * tree-flow.h (enum tree_ann_type): Add SSA_NAME_ANN.
1983
        (enum mem_tag_kind): Declare.
1984
        (struct var_ann_d): Remove fields 'is_call_clobbered',
1985
        'may_alias_global_mem' and 'may_point_to_global_mem'.
1986
        Replace bitfield 'mem_tag' with enum bitfield 'mem_tag_kind'.
1987
        Rename field 'mem_tag' to 'type_mem_tag'.
1988
        (struct stmt_ann_d): Change type of field 'addresses_taken' to a
1989
        bitmap.  Update all users.
1990
        (struct ssa_name_ann_d): Declare.
1991
        (union tree_ann_d): Add field 'ssa_name'.
1992
        (ssa_name_ann_t): New type.
1993
        (struct bb_ann_d): Add field 'has_escape_site'.
1994
        (num_call_clobbered_vars): Remove.
1995
        (call_clobbered_var): Remove.
1996
        (call_clobbered_vars): Change to bitmap.
1997
        (dump_points_to_info): Declare.
1998
        (debug_points_to_info): Declare.
1999
        (walk_use_def_chains_fn): New type.
2000
        (walk_use_def_chains): Declare.
2001
        (is_call_clobbered): Declare.
2002
        (mark_call_clobbered): Declare.
2003
        * tree-simple.c (needs_to_live_in_memory): Move to tree.c.
2004
        (is_gimple_non_addressable): Update comment.
2005
        (is_gimple_call_clobbered): Remove.
2006
        (get_call_expr_in): New.
2007
        (get_base_var): Rename from get_base_symbol.  Update all callers.
2008
        Don't strip SSA_NAME wrappers.
2009
        (get_base_decl): New.
2010
        (get_base_address): New.
2011
        * tree-simple.h (is_gimple_call_clobbered): Remove.
2012
        (needs_to_live_in_memory): Remove.
2013
        (get_base_decl): Declare.
2014
        (get_base_var): Declare.
2015
        (get_base_address): Declare.
2016
        * tree-ssa-dce.c (need_to_preserve_store): Reduce to calling
2017
        needs_to_live_in_memory.
2018
        * tree-ssa-operands.c: Include tree-pass.h and timevar.h
2019
        (get_stmt_operands): Push/pop TV_TREE_OPS time var.
2020
        Call mark_call_clobbered for asms that store to memory.
2021
        (get_expr_operands): When adding operands for INDIRECT_REF
2022
        expressions, use flow-sensitive aliasing, if available.
2023
        Assume that malloc-like function calls won't clobber.
2024
        (add_call_clobber_ops):
2025
        (add_call_read_ops):
2026
        * tree-ssa.c (rewrite_into_ssa): If any variable in vars_to_rename
2027
        is a pointer, invalidate all name memory tags.
2028
        (create_temp): Call is_call_clobbered and mark_call_clobbered.
2029
        (walk_use_def_chains_1): New.
2030
        (walk_use_def_chains): New.
2031
 
2032
        * tree.c (needs_to_live_in_memory): New.
2033
        * tree.h (DECL_NEEDS_TO_LIVE_IN_MEMORY_INTERNAL): Define.
2034
        (struct tree_decl): Add bitfield 'needs_to_live_in_memory'.
2035
        Update unused bits comment.
2036
        (needs_to_live_in_memory): Declare.
2037
 
2038
        * tree-simple.h (get_call_expr_in): Declare.
2039
        * tree-sra.c (scalarize_stmt): Call get_call_expr_in when handling
2040
        function calls.
2041
        * tree-ssa-ccp.c (likely_value): Likewise.
2042
 
2043
        * params.def (PARAM_MAX_CLOBBERED_VARS_GLOBAL_VAR): Remove.
2044
        (PARAM_MAX_CALLS_GLOBAL_VAR): Remove.
2045
        (PARAM_GLOBAL_VAR_THRESHOLD): Define.
2046
        (PARAM_MAX_ALIAS_SET_SIZE): Define.
2047
        Update all users.
2048
        * params.h (MAX_CALLS_FOR_GLOBAL_VAR): Remove.
2049
        (MAX_CLOBBERED_VARS_FOR_GLOBAL_VAR): Remove.
2050
        (GLOBAL_VAR_THRESHOLD): Define.
2051
        (MAX_ALIAS_SET_SIZE): Define.
2052
 
2053
2004-02-09  Richard Henderson  
2054
 
2055
        * langhooks.h (lang_hooks_for_functions): Add missing_noreturn_ok_p.
2056
        * langhooks-def.h, c-lang.c, objc/objc-lang.c
2057
        (LANG_HOOKS_FUNCTION_MISSING_NORETURN_OK_P): New.
2058
        * c-objc-common.c (c_missing_noreturn_ok_p): Return bool.
2059
        (c_objc_common_init): Don't set lang_missing_noreturn_ok_p.
2060
        * c-tree.h (c_missing_noreturn_ok_p): Update decl.
2061
        * flow.c (lang_missing_noreturn_ok_p): Remove.
2062
 
2063
        * flow.c (check_function_return_warnings): Move to tree-cfg.c.
2064
        * toplev.c (rest_of_compilation): Don't call it.
2065
        * tree-cfg.c (execute_warn_function_return): Move from flow.c,
2066
        rename, update for tree vs rtl.
2067
        (pass_warn_function_return): New.
2068
        * tree-pass.h (pass_warn_function_return): Declare it.
2069
        * tree-optimize.c (init_tree_optimization_passes): Run it.
2070
 
2071
        * function.h (struct function): Remove x_clobber_return_insn.
2072
        * function.c (free_after_compilation): Don't set it.
2073
        (expand_function_end): Likewise.
2074
 
2075
2004-02-09  Richard Henderson  
2076
 
2077
        Revert:
2078
        2004-02-06  Richard Henderson  
2079
        * tree-ssa-dom.c (record_equivalences_from_phis): Use
2080
        record_const_or_copy.
2081
        (record_equivalences_from_stmt): Likewise.  Replace
2082
        block_avail_exprs_p and block_nonzero_vars_p args with bd.
2083
 
2084
2004-02-09  Jeff Law  
2085
 
2086
        * tree-ssa-dom.c (get_eq_expr_value): Improve handling of boolean
2087
        conditions.
2088
 
2089
        * domwalk.c (walk_dominator_tree): Completely lose PARENT argument.
2090
        Callers updated.  No longer pass PARENT to callbacks.
2091
        * domwalk.h (struct dom_walk_data): Corresponding changes.
2092
        * tree-ssa-dom.c: Likewise.
2093
        * tree-ssa.c: Likewise.
2094
 
2095
        * domwalk.c (walk_dominator_tree): Change last argument to be the
2096
        parent block in the dominator tree rather than the last statement
2097
        in the parent block in the dominator tree.  Similarly in all the
2098
        callbacks.
2099
        * domwalk.h (struct dom_walk_data): Update callback prototypes.
2100
        * tree-ssa-dom.c: Corresponding changes.
2101
        * tree-ssa.c: Likewise.
2102
 
2103
        * tree-ssa-dom.c (redirect_edges_and_update_ssa_graph): Break out
2104
        of tree_ssa_dominator_optimize.  If the out-of-ssa pass creates
2105
        new variables, then invalidate some requested jump threads.
2106
 
2107
2004-02-08  Richard Henderson  
2108
 
2109
        * flow.c (regno_uninitialized): Remove.
2110
        * output.h (regno_uninitialized): Remove.
2111
        * function.c (setjmp_vars_warning): Rename from
2112
        uninitialized_vars_warning, remove uninitialized vars warning.
2113
        * toplev.c (rest_of_handle_life): Update to match.
2114
        * tree.h (setjmp_vars_warning): Likewise.
2115
 
2116
        * tree-sra.c (lookup_scalar): Set DECL_NAME to something descriptive.
2117
 
2118
        * tree-ssa.c (warn_uninit): New.
2119
        (warn_uninitialized_var, warn_uninitialized_phi): New.
2120
        (execute_early_warn_uninitialized): New.
2121
        (execute_late_warn_uninitialized): New.
2122
        (gate_warn_uninitialized): New.
2123
        (pass_early_warn_uninitialized): New.
2124
        (pass_late_warn_uninitialized): New.
2125
        * tree-pass.h (pass_early_warn_uninitialized): New.
2126
        (pass_late_warn_uninitialized): New.
2127
        * tree-optimize.c (init_tree_optimization_passes): Add them.
2128
 
2129
2004-02-08  Richard Henderson  
2130
 
2131
        * cppexp.c (append_digit): Rearrange unsignedp/overflow setting.
2132
        (eval_token, num_binary_op, num_part_mul, num_div_op): Likewise.
2133
        * ra-rewrite.c (rewrite_program2): Zero info.
2134
        * reload.c (decompose): Zero val.
2135
        * tree-ssa-ccp.c (visit_phi_node): Zero phi_val.const_val.
2136
 
2137
2004-02-07  Jan Hubicka  
2138
 
2139
        * tree-inline.c (save_body): Clone the parm decl correctly.
2140
 
2141
        * cgraph.c: Add introductionary comment.
2142
        (cgraph_remove_node): Release DECL_SAVED_INSNS too.
2143
        * cgraphunit.c: Likewise.
2144
        (cgraph_finalize_function): Release DECL_SAVED_INSNS of external function.
2145
        (decl_expand_function): Release DECL_SAVED_INSNS/body/tree.
2146
        (cgraph_remove_unreachable_nodes): Likewise; guard cgraph verification.
2147
 
2148
2004-02-06  Richard Henderson  
2149
 
2150
        * common.opt (fdisable-tree-ssa): Remove.
2151
        * flags.h (flag_disable_tree_ssa): Remove.
2152
        * toplev.c (flag_disable_tree_ssa): Remove.
2153
        (f_options): Don't set it.
2154
        * opts.c (common_handle_option): Likewise.
2155
        * doc/invoke.texi (fdisable-tree-ssa): Remove.
2156
 
2157
2004-02-06  Richard Henderson  
2158
 
2159
        * tree-ssa-dom.c (record_equivalences_from_phis): Use
2160
        record_const_or_copy.
2161
        (record_equivalences_from_stmt): Likewise.  Replace
2162
        block_avail_exprs_p and block_nonzero_vars_p args with bd.
2163
 
2164
2004-02-06  Andrew Pinski  
2165
 
2166
        PR middle-end/13127
2167
        * tree-inline.c (declare_return_variable): Set the no warning bit
2168
        on the variable created for the return value.
2169
 
2170
2004-02-06  Richard Henderson  
2171
 
2172
        * tree-pretty-print.c (dump_generic_node): Render NON_LVALUE_EXPR.
2173
 
2174
        * tree-ssa-dom.c (local_fold): New.
2175
        (thread_across_edge, simplify_rhs_and_lookup_avail_expr,
2176
        find_equivalent_equality_comparison): Use it.
2177
 
2178
2004-02-06  Andrew Pinski  
2179
 
2180
        PR c/13863
2181
        * c-common.c (c_decl_uninit_1): Remove.
2182
        (c_decl_uninit): Remove.
2183
        * c-common.h (c_decl_uninit): Remove prototype.
2184
        * c-lang.c (LANG_HOOKS_DECL_UNINIT): Delete.
2185
        * objc/objc-lang.c (LANG_HOOKS_DECL_UNINIT): Delete.
2186
        * c-simplify.c (gimplify_decl_stmt): Set TREE_NO_WARNING
2187
        on the decl where the initial is itself.
2188
        * function.c (uninitialized_vars_warning): Remove old comment
2189
        and check for DECL_INITIAL, replace with a check of TREE_NO_WARNING
2190
        and do not call the langhook.
2191
        * langhooks-def.h (LANG_HOOKS_DECL_UNINIT): Remove.
2192
        (LANG_HOOKS_INITIALIZER): Remove usage of LANG_HOOKS_DECL_UNINIT.
2193
        * langhooks.c (lhd_decl_uninit): Remove.
2194
        * langhooks.h (lhd_decl_uninit): Remove prototype.
2195
 
2196
2004-02-05  Richard Henderson  
2197
 
2198
        * tree-ssa-dom.c (record_const_or_copy_1): New.
2199
        (record_const_or_copy): New.
2200
        (thread_across_edge): Use it.
2201
        (dom_opt_finalize_block): Likewise.  Tidy.
2202
        (record_equality): Split out from ...
2203
        (record_equivalences_from_incoming_edge): ... here.
2204
 
2205
2004-02-05  Richard Henderson  
2206
 
2207
        * tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): Allow
2208
        mixing PLUS and MINUS when folding operations.
2209
 
2210
2004-02-05  Andrew Macleod  
2211
 
2212
        * tree-pretty-print.c (dump_bb_header):  Allow TDF_SLIM printing.
2213
        (dump_bb_end):  Allow TDF_SLIM printing.
2214
        (dump_generic_bb_buff):  Add flags parameter to dump_bb_end.
2215
 
2216
2004-02-05  Jan Hubicka  
2217
 
2218
        * alias.c (find_base_term, get_addr):  Do not dereference NULL
2219
        pointer when all VALUE's locations has been invalidated.
2220
        (rtx_equal_for_memref_p): Simplify checking of VALUEs.
2221
 
2222
2004-02-04  Daniel Berlin  
2223
 
2224
        * tree-alias-ander.c (andersen_init): Reorder/Redo code so that we
2225
        actually free the memory in intraprocedural mode.
2226
        (andersen_cleanup): Ditto.
2227
 
2228
2004-02-04  Richard Henderson  
2229
 
2230
        * tree-ssa-ccp.c (get_value, visit_phi_node,
2231
        visit_assignment, dump_lattice_value): Tidy.
2232
        (evaluate_stmt): Don't do debug dump here.
2233
        (def_to_undefined): Merge into set_lattice_value.
2234
        (def_to_varying): Likewise, but retain as a wrapper.
2235
        (set_lattice_value): Tidy.  Emit correct debug info.
2236
        (replace_uses_in): Remove strlen hacks.
2237
        (execute_fold_all_builtins): Fix DECL_BUILT_IN comparison.
2238
        Force folding of BUILT_IN_CONSTANT_P.
2239
 
2240
2004-02-04  Richard Henderson  
2241
 
2242
        * builtins.c (fold_builtin_expect): New.
2243
        (fold_builtin_1): Call it.
2244
 
2245
2004-02-04  Jeff Law  
2246
 
2247
        * jump.c (duplicate_loop_exit_test): Allow copying of the loop
2248
        exit test even if we do not find the LOOP_END note.
2249
 
2250
        * domwalk.c: Update comments.
2251
 
2252
2004-02-04  Brian Booth  
2253
 
2254
        PR opt/13755
2255
        * tree-dfa.c (compute_alias_sets): set rename flag for variables
2256
        aliased by GLOBAL_VAR.
2257
 
2258
2004-02-04  Richard Henderson  
2259
 
2260
        * tree-ssa-dom.c (simplify_switch_and_lookup_avail_expr): New.
2261
        (eliminate_redundant_computations): Call it.
2262
 
2263
2004-02-03  Richard Henderson  
2264
 
2265
        PR opt/13869
2266
        * tree-cfg.c (cfg_remove_useless_stmts_bb): Correct handling of
2267
        boolean variables in COND_EXPR_COND.
2268
 
2269
2004-02-03  Richard Henderson  
2270
 
2271
        PR middle-end/13325
2272
        * builtins.c (fold_builtin_1): Rename from fold_builtin.
2273
        (fold_builtin): New.
2274
        * c-simplify.c (gimplify_expr_stmt): Check TREE_NO_WARNING.
2275
        * stmt.c (expand_expr_stmt_value): Likewise.
2276
        * tree.h (struct tree_common): Add nowarning_flag.
2277
        (TREE_NO_WARNING): New.
2278
        (TREE_NO_UNUSED_WARNING): Remove.
2279
        * c-typeck.c (build_unary_op): Use TREE_NO_WARNING instead.
2280
        * stmt.c (warn_if_unused_value): Likewise.
2281
 
2282
2004-02-03  Steven Bosscher  
2283
 
2284
        * tree-ssa-dce.c: Partial rewrite.  The old DCE is now called
2285
        `conservative'.  The more aggressive algorithm uses control
2286
        dependence and is called `aggressive' or cd-dce.
2287
        * timevar.def (TV_TREE_DCE): Rename.
2288
        (TV_TREE_CD_DCE, TV_CONTROL_DEPENDENCES): New timevars.
2289
        * tree-pass.h: Declare extern pass_cd_dce.
2290
        * tree-optimize.c (init_tree_optimization_passes): Replace
2291
        the final DCE pass with a CD-DCE pass.
2292
 
2293
2004-02-01  Jan Hubicka  
2294
 
2295
        * cgraphunit.c (cgraph_mark_inline_edge): Fix insertion to
2296
        cgraph_inline_hash.
2297
 
2298
2004-01-30  Frank Ch. Eigler  
2299
 
2300
        * common.opt: Add support for -fmudflapth, -fmudflapir.
2301
        * invoke.texi: Document them.
2302
        * opts.c: Ditto.
2303
        * flags.h: Add new flags flag_mudflap_threads, _ignore_reads.
2304
        * toplev.c: Initialize new flags.  Remove redundant code from
2305
        lang_independent_options[].
2306
        * tree-mudflap.c (*): Support new flag_mudflap_threads encoding.
2307
        (mf_xform_derefs_1): Support flag_mudflap_ignore_reads option.
2308
        * c-mudflap.c (mflang_flush_calls): Mark static ctor TREE_USED.
2309
 
2310
2004-01-30  Ian Lance Taylor  
2311
 
2312
        * gengtype-yacc.y (bitfieldlen): Add empty action.
2313
 
2314
2004-01-30  Diego Novillo  
2315
 
2316
        * configure.ac: Move configuration for libbanshee and
2317
        libgmp from configure.in.
2318
 
2319
2004-01-30  Richard Henderson  
2320
 
2321
        PR opt/13524
2322
        * gengtype-yacc.y (struct_fields): Accept unnamed bitfields.
2323
        (bitfieldlen): Split from ...
2324
        (bitfieldopt): ... here.
2325
        * gimplify.c (mark_not_gimple): Remove.
2326
        (gimplify_call_expr): Don't ignore BUILT_IN_MD.
2327
        * tree-dfa.c (struct walk_state): Remove is_not_gimple.
2328
        (find_referenced_vars): Don't look for TREE_NOT_GIMPLE.
2329
        (find_vars_r, add_referenced_var): Likewise.
2330
        * tree-ssa-operands.c (get_stmt_operands, get_expr_operands): Likewise.
2331
        * tree-simple.h (mark_not_gimple): Remove.
2332
        * tree.h (struct tree_common): Remove not_gimple_flag.
2333
        (TREE_NOT_GIMPLE): Remove.
2334
 
2335
2004-01-29  Jason Merrill  
2336
 
2337
        PR c++/13865
2338
        * c-simplify.c (gimplify_for_stmt): Reorganize to fix cleanups.
2339
 
2340
2004-01-29  Richard Henderson  
2341
 
2342
        PR c++/13543
2343
        * tree-inline.c (initialize_inlined_parameters): Register the
2344
        substitute reference also.
2345
 
2346
2004-01-29  Richard Henderson  
2347
 
2348
        * tree-inline.c (gimple_expand_calls_inline): Look inside
2349
        RETURN_EXPR.
2350
 
2351
        * tree-pretty-print.c (dump_generic_node): If TDF_DETAILS, dump
2352
        both name and uid.
2353
 
2354
2004-01-29  Zdenek Dvorak  
2355
 
2356
        * cfg.c (unlink_block): Reset prev_bb and next_bb.
2357
 
2358
2004-01-29  Jeff Law 
2359
            Andrew MacLeod 
2360
 
2361
        * tree-ssa-live.h (tpa_next_partition): Correctly handle compressed
2362
        elements.
2363
        * tree-ssa.c (coalesce_ssa_name): New argument, flags.  Callers
2364
        updated.  Test SSANORM_COMBINE_TEMPS in flags rather than
2365
        flag_tree_combine_temps.
2366
        (coalesce_vars): Either operand of a copy might not have a
2367
        partition when rewriting a subset of the variables out of SSA form.
2368
        (rewrite_vars_out_of_ssa): Honor -ftree-combine-temps by passing
2369
        in SSANORM_COMBINE_TEMPS in flags argument to remove_sas_form..
2370
 
2371
2004-01-29  Dale Johannesen  
2372
 
2373
        * Makefile.in (OBJS-common):  Move tree-nomudflap.o...
2374
        (OBJS-archive): ...to here, and remove duplicate tree-optimize.o.
2375
 
2376
2004-01-28  Richard Henderson  
2377
 
2378
        PR middle-end/13898
2379
        * gimplify.c (gimplify_init_constructor): Invoke
2380
        lhd_set_decl_assembler_name on the now-static variable.
2381
 
2382
2004-01-28  Richard Henderson  
2383
 
2384
        PR opt/13798
2385
        * expr.c (is_zeros_p): Remove.  Change all callers to use
2386
        initializer_zerop.
2387
        (categorize_ctor_elements_1, categorize_ctor_elements): New.
2388
        (count_type_elements): New.
2389
        (mostly_zeros_p): Use them.
2390
        * gimplify.c (tmp_var_id_num): Split out from create_tmp_var_raw.
2391
        (create_tmp_var_name): Likewise.
2392
        (gimplify_init_constructor): Drop constructors to readonly memory
2393
        as indicated by categorize_ctor_elements and can_move_by_pieces.
2394
        * tree.c (initializer_zerop): Handle VECTOR_CST.  Don't check
2395
        AGGREGATE_TYPE_P for CONSTRUCTOR.
2396
        * tree.h (categorize_ctor_elements): Declare.
2397
        (count_type_elements): Declare.
2398
        * Makefile.in (gimplify.o): Update dependencies.
2399
        (GTFILES): Add gimplify.c.
2400
 
2401
2004-01-27  Frank Ch. Eigler  
2402
 
2403
        * tree-mudflap.c (mx_register_decls): Support VLAs.
2404
        (mf_xform_derefs_1): Disable checking shortcut for VLAs.
2405
        * c-simplify.c (gimplify_decl_stmt): Add mudflap xref comment.
2406
        * gimplify.c (gimplify_bind_expr): Ditto.
2407
 
2408
2004-01-27  Daniel Berlin  
2409
 
2410
        * tree-ssa-pre.c:  Add more comments describing SSAPRE and
2411
        the various functions.
2412
        (generate_expr_as_of_bb): Use PRED, a basic block argument, instead of
2413
        j, the index of that bb.
2414
        (generate_vops_as_of_bb): Ditto.
2415
        (insert_occ_in_preorder_dt_order): Rename to
2416
        create_and_insert_occ_in_preorder_dt_order.
2417
 
2418
2004-01-27  Daniel Berlin  
2419
 
2420
        * tree-ssa-pre.c (rename_1): Add some more comments.
2421
 
2422
2004-01-25  Andrew Pinski  
2423
 
2424
        PR c/13748
2425
        * c-decl.c (finish_function): Do not pass
2426
        the function on to optimizers if there was an error.
2427
 
2428
2004-01-23  Richard Henderson  
2429
 
2430
        PR opt/12941
2431
        * combine.c (SHIFT_COUNT_TRUNCATED): Provide default value.
2432
        (simplify_comparison): Don't simplify (eq (zero_extract c 1 r) 0)
2433
        if SHIFT_COUNT_TRUNCATED is set.
2434
 
2435
2004-01-21  Richard Henderson  
2436
 
2437
        PR c/11267
2438
        * c-decl.c (c_finalize): New.
2439
        (finish_function): Use it.  Genericize and finalize only non-nested
2440
        functions.  Register nested functions with cgraph.
2441
        * c-simplify.c: Include cgraph.h.
2442
        (c_genericize): Genericize nested functions.
2443
        * gimplify.c (gimplify_expr): Use DECL_SAVED_INSNS to access
2444
        the struct function for the context.
2445
        * Makefile.in (c-simplify.o): Update dependencies.
2446
 
2447
2004-01-21  Steven Bosscher  
2448
 
2449
        PR opt/13767
2450
        * tree-cfg.c (simple_goto_p): Remove NONLOCAL_LABEL check.
2451
 
2452
2004-01-21  Dale Johannesen  
2453
 
2454
        * tree-dfa.c: Fix comment.
2455
 
2456
2004-01-21  Richard Henderson  
2457
 
2458
        PR opt/13681
2459
        * tree-ssa-operands.c (get_expr_operands): Handle (&x + c).
2460
 
2461
        * tree-ssa-ccp.c (maybe_fold_offset_to_component_ref): Handle
2462
        flexible array members and lookalikes.
2463
 
2464
2004-01-21  Dale Johannesen  
2465
 
2466
        * tree-ssa-dom.c (cprop_into_stmt):  Add convert call
2467
        to prevent type mismatches.
2468
 
2469
2004-01-21  Daniel Berlin  
2470
 
2471
        * tree-ssa-pre.c (load_modified_phi_result): PARM_DECL is okay
2472
        to not have a defbb.
2473
        (rename_1): Add a comment.
2474
 
2475
2004-01-21  Jeff Law  
2476
 
2477
        * tree-ssa-dom.c (find_equivalent_equality_comparison): Treat
2478
        CONVERT_EXPRs just like NOP_EXPRs.
2479
        (record_equivalences_from_stmt): Similarly.
2480
        (thread_across_edge): Fix formatting goof.
2481
 
2482
        * tree-ssa-dom.c (thread_across_edge): Remove bogus restriction
2483
        which prevents threading around to the top of a loop.
2484
 
2485
        * tree-ssa-dom.c (thread_across_edge): Handle SWITCH_EXPRs in the
2486
        target block in addition to COND_EXPRs.
2487
 
2488
        * tree-ssa-dom.c (thread_across_edge): Create equivalences for
2489
        PHIs before looking at the statements in the destination
2490
        block.
2491
 
2492
2004-01-20  Roger Sayle  
2493
 
2494
        * fold-const.c (fold_convert): Rename to fold_convert_const.
2495
        (fold_convert_const): Change arguments to take a tree_code,
2496
        a type and the operand/expression to be converted.  Return
2497
        NULL_TREE if no simplification is possible.  Add support for
2498
        FIX_CEIL_EXPR and FIX_FLOOR_EXPR in addition to FIX_TRUNC_EXPR.
2499
        (fold): Handle FIX_CEIL_EXPR and FIX_FLOOR_EXPR.
2500
        Adjust call to fold_convert to match new fold_convert_const.
2501
        Avoid modifying the tree passed to fold in-place.
2502
        (nondestructive_fold_unary_to_constant): Likewise, simplify
2503
        call to fold_convert to match new fold_convert_const.
2504
 
2505
2004-01-20  Daniel Berlin  
2506
 
2507
        * tree-alias-ander.c (andersen_op_assign): Update
2508
        prototype. Make this handle &x in the operands using
2509
        the addrargs parameter.
2510
        (andersen_init): Turn off ip_partial until variables
2511
        aliasing variables in other functions is resolved.
2512
        (andersen_add_var): Use newly renamed alias_var_new_with_aterm.
2513
        Fix comment.
2514
        (andersen_add_var_same): Ditto.
2515
        (andersen_function_call): Use ip_partial, not flag_unit_at_a_time.
2516
        * tree-alias-common.c (get_values_from_constructor): Add bitmap
2517
        and int * arguments. Used to mark operands that we are taking
2518
        address of.
2519
        (get_alias_var_decl): We should never see FIELD_DECL's right now.
2520
        (intra_function_call): Reverse ordering for slightly faster
2521
        projection merging.
2522
        (find_op_of_decl): New function.
2523
        (find_func_aliases): Use it.
2524
        Comment x = foo.y case.
2525
        Move get_alias_var_decl of arguments so we only call it if
2526
        necessary.
2527
        Handle address of arguments in operations.
2528
        (create_fun_alias_var): tvar->var.
2529
        Set context of fakeargs.
2530
        Set context of fakedecls.
2531
        Set DECL_PTA_ALIASVAR of RETURN_DECL's.
2532
        (create_fun_alias_var_ptf): tvar->var.
2533
        Set context of fakedecls.
2534
        (create_alias_vars): Only create alias vars for globals
2535
        with DECL_INITIAL's.
2536
        * tree-alias-common.h (struct tree_alias_ops):
2537
        Update op_assign arguments.
2538
        (may_alias): Fix comment.
2539
        (same_points_to_set): Ditto.
2540
        (empty_points_to_set): Ditto.
2541
        * tree-alias-type.h: Rename alias_tvar_new_with_aterm
2542
        -> alias_var_new_with_aterm.
2543
        * tree-alias-type.c: Ditto.
2544
 
2545
2004-01-20  Richard Henderson  
2546
 
2547
        * tree-sra.c (get_scalar_for_field): Validate field.
2548
        (create_scalar_copies): Iterate over rhs fields too.
2549
 
2550
2004-01-19  Dale Johannesen  
2551
 
2552
        * params.def:  Add PARAM_MAX_CALLS_GLOBAL_VAR and
2553
        PARAM_MAX_CLOBBERED_VARS_GLOBAL_VAR.
2554
        params.h:  Ditto.
2555
        tree-dfa.c:  Use them.
2556
        doc/invoke.texi:  Document them.
2557
 
2558
2004-01-19  Jeff Law  
2559
 
2560
        * tree-ssa.c (insert_phi_nodes_for): Always use fully pruned
2561
        SSA form.
2562
 
2563
        * tree-flow.h: Update copyright dates.
2564
        (register_new_def): Declare.
2565
        * tree-ssa-dom.c: Update copyright dates.
2566
        Add tracking of current definition of each program variable just
2567
        like we do when rewriting into SSA form.
2568
        (get_value_for, set_value_for): Handle either an SSA_NAME or
2569
        regular variable.
2570
        (tree_ssa_dominator_optimize): Initialize and update CURRDEFS.
2571
        If we thread through a block with real statements, the destination
2572
        of those statements must be rewritten too.
2573
        (thread_across_edge): Skip nop statements at the start of a
2574
        block.
2575
        (dom_opt_initialize_block_local_data): Clear block_defs
2576
        appropriately.
2577
        (record_equivalences_from_phis): Accept walk_data structure.
2578
        Call register_new_def appropriately.
2579
        (optimize_stmt): Call register_new_defs_for_stmt.
2580
        (dom_opt_finalize_block): Restore CURRDEFS appropriately.
2581
        (register_new_definitions_for_stmt): New.
2582
        * tree-ssa.c: Update copyright dates.
2583
        (register_new_def): No longer static.  Accept additional argument
2584
        for the table to hold the new definition.  Callers updated.
2585
 
2586
        * gimplify.c: Update copyright dates.
2587
        * tree-cfg.c: Likewise.
2588
        * tree.h: Likewise.
2589
 
2590
        * tree-iterator.c, tree-iterator.c: Use GCC rather than GNU CC.
2591
        * tree-ssa-pre.c, tree-ssa-live.h: Likewise.
2592
 
2593
2004-01-19  Daniel Berlin  
2594
 
2595
        * timevar.def (TV_TREE_SPLIT_EDGES): New timevar.
2596
        * tree-ssa-pre.c (split_critical_edges): Move from here
2597
        (pass_pre): Add PROP_no_crit_edges as required.
2598
        * tree-cfg.c (split_critical_edges): to here.
2599
        (pass_split_crit_edges): New pass.
2600
        * tree-optimize.c (tree_optimization_passes): Add NEXT_PASS
2601
        (split_crit_edges).
2602
        * tree-pass.h: Add PROP_no_crit_edges.
2603
        (pass_split_crit_edges): Declared.
2604
 
2605
2004-01-19  Frank Ch. Eigler  
2606
 
2607
        * tree-mudflap.c (mf_build_check_statement_for): Tolerate
2608
        incoming locus NULL pointer.
2609
 
2610
2004-01-18  Richard Henderson  
2611
 
2612
        * builtins.c (simplify_builtin_strcpy): Export.  Take strlen argument.
2613
        (simplify_builtin_strncpy, simplify_builtin_strcmp): Similarly.
2614
        (simplify_builtin_strncmp): Similarly.
2615
        (simplify_builtin): Update to match.
2616
        * expr.h (simplify_builtin_strcmp, simplify_builtin_strncmp,
2617
        simplify_builtin_strcpy, simplify_builtin_strncpy): Declare.
2618
        * tree-pass.h (pass_fold_builtins): New.
2619
        * tree-optimize.c (init_tree_optimization_passes): Add it.
2620
        * tree-ssa-ccp.c (ccp_fold_builtin): Handle BUILT_IN_STRCPY,
2621
        BUILT_IN_STRNCPY, BUILT_IN_STRCMP, BUILT_IN_STRNCMP.
2622
        (get_strlen): Don't cast to size_t.
2623
        (execute_fold_all_builtins, pass_fold_builtins): New.
2624
 
2625
2004-01-19  Jan Hubicka  
2626
 
2627
        PR opt/13729
2628
        * cgraphunit.c (cgraph_finalize_compilation_unit): Fix memory leak.
2629
        (cgraph_remove_unreachable_nodes):  Do not mix analyzed and
2630
        DECL_SAVED_TREE flags.
2631
 
2632
2004-01-18  Richard Henderson  
2633
 
2634
        * tree-sra.c (REALPART_INDEX, IMAGPART_INDEX): Remove.
2635
        (sra_candidates, needs_copy_in): Use a bitmap.  Update all users.
2636
        (struct sra_elt, sra_elt_hash, sra_elt_eq): New.
2637
        (sra_map_size): Remove.
2638
        (sra_map): Use a htab_t.
2639
        (lookup_scalar): Update to match.
2640
        (get_scalar_for_field, get_scalar_for_complex_part): Likewise.
2641
        (scalarize_structure_assignment): Use annotate_all_with_locus.
2642
        (csc_build_component_ref): Remove index argument.
2643
        (csc_build_complex_part): Take tree_code, not index.
2644
        (create_scalar_copies): Don't collect indicies.
2645
        (emit_scalar_copies): New.
2646
        (scalarize_modify_expr, scalarize_tree_list): Use it.
2647
        (scalarize_return_expr): Likewise.
2648
        (scalarize_structures): Simplify needs_copy_in iteration.
2649
        (scalarize_call_expr): Use annotate_all_with_locus.
2650
        (dump_sra_map_trav): Split from ...
2651
        (dump_sra_map): ... here.  Update for hash table.
2652
        (tree_sra): Update for new datastructures.
2653
 
2654
2004-01-18  Richard Henderson  
2655
 
2656
        * tree-cfg.c (dump_function_to_file): Move ";; Function" header ...
2657
        * tree-optimize.c (execute_one_pass): ... here.
2658
 
2659
2004-01-17  Daniel Berlin  
2660
 
2661
        * tree-alias-common.c: s@_typevar@_var@g, s@_TVAR@_VAR@g,
2662
        s@_TYPEVAR@_VAR@g
2663
        * tree-alias-common.h: Ditto
2664
        * tree.h: Ditto
2665
        * tree-alias-ander.c: Ditto
2666
        * tree-alias-type.c: Ditto
2667
        * tree-alias-type.h: Ditto
2668
 
2669
2004-01-17  Richard Henderson  
2670
 
2671
        * tree-complex.c (gimplify_val): Copy TREE_BLOCK.
2672
 
2673
        * tree-complex.c (gimplify_val): New.
2674
        (extract_component, do_binop, do_unop): Use it.
2675
 
2676
2004-01-17  Richard Henderson  
2677
 
2678
        * tree-complex.c (expand_complex_operations_1): Fix RETURN_EXPR
2679
        thinko in last change.
2680
 
2681
2004-01-18  Zdenek Dvorak  
2682
 
2683
        * cfghooks.c (split_block): Don't redirect edges.
2684
        * cfgrtl.c (rtl_split_block): Do it here.
2685
        * tree-cfg.c (tree_split_block): Ditto.
2686
 
2687
2004-01-17  Richard Henderson  
2688
 
2689
        * tree-cfg.c (verify_expr): Tidy.  Check COND_EXPR for boolean
2690
        condition.
2691
 
2692
2004-01-17  Jan Hubicka  
2693
 
2694
        PR optimization/11761
2695
        * Makefile.in: Remove tree-simple.c from GTYized files.
2696
        * tree-dfa.c (find_addressable_vars): Parse nontrivial ADDR_EXPRs.
2697
        (discover_nonconstant_array_refs_r): New static function.
2698
        (discover_nonconstant_array_refs): New global function.
2699
        * tree-flow.h (discover_nonconstant_array_refs): Declare.
2700
        * tree-simple.c (types_checked, types_in_memory): Kill.
2701
        (struct_needs_to_live_in_memory): Kill.
2702
        (needs_to_live_in_memory): aggregates are safe.
2703
        * tree-ssa.c (rewrite_out_of_ssa): Call the new function.
2704
 
2705
2004-01-17  Richard Henderson  
2706
 
2707
        PR opt/13718
2708
        * tree-complex.c (expand_complex_comparison): Handle COND_EXPR.
2709
        (expand_complex_operations_1): Likewise.
2710
 
2711
2004-01-17  Richard Henderson  
2712
 
2713
        * tree-sra.c (scalarize_tree_list): Take bitmap argument to
2714
        avoid emitting duplicates.  Update all callers.
2715
 
2716
2004-01-17  Richard Henderson  
2717
 
2718
        PR opt/13718
2719
        * tree-complex.c (expand_complex_comparison): New.
2720
        (expand_complex_operations_1): Handle EQ_EXPR and NE_EXPR.
2721
 
2722
2004-01-16  Daniel Berlin  
2723
 
2724
        * tree-alias-common.c (get_alias_var): Handle BIT_FIELD_REF.
2725
        (find_func_aliases): Ditto.
2726
        Update for fact that basic component_refs are no longer
2727
        is_gimple_variable.
2728
        (create_fun_alias_var): Set DECL_CONTEXT on our faked declarations.
2729
        (pass_del_pta): PTA dumps info on delete, so it needs a name.
2730
 
2731
2004-01-16  Steven Bosscher  
2732
 
2733
        * tree-optimize.c (init_tree_optimization_passes): Run DCE
2734
        before the first dominator optimization pass.
2735
 
2736
2004-01-15  Brian Booth 
2737
            Richard Henderson  
2738
 
2739
        * tree-sra.c (REALPART_INDEX, IMAGPART_INDEX): New.
2740
        (sra_map_size): New.
2741
        (make_temp): New.
2742
        (mark_all_vdefs): New.
2743
        (is_sra_candidate_decl): New.
2744
        (is_sra_candidate_ref): New.
2745
        (lookup_scalar): Use sra_map_size, make_temp.
2746
        (get_scalar_for_field): Rename from get_scalar_for.
2747
        (get_scalar_for_complex_part): New.
2748
        (can_be_scalarized_p): Handle COMPLEX_TYPE.
2749
        (scalarize_component_ref): Handle REAL/IMAGPART_EXPR.
2750
        (scalarize_structure_assignment): Tidy.
2751
        (find_candidates_for_sra): Handle COMPLEX_TYPE, return bool.
2752
        (csc_assign, csc_build_component_ref): Split out from ...
2753
        (create_scalar_copies): ... here.  Handle COMPLEX_TYPE.
2754
        (csc_build_complex_part): New.
2755
        (scalarize_modify_expr): Use is_sra_candidate_foo.
2756
        (scalarize_tree_list): Likewise.
2757
        (scalarize_return_expr): Likewise.
2758
        (dump_sra_map): Split out from ...
2759
        (tree_sra): ... here.  Tidy.
2760
 
2761
2004-01-15  Frank Ch. Eigler  
2762
 
2763
        * tree-mudflap.c (mf_xform_derefs): Accept void return statements.
2764
 
2765
2004-01-15  Andrew MacLeod  
2766
            Jeff Law  
2767
 
2768
        * tree-ssa-dom.c (remove_local_expressions_from_table): New function
2769
        extracted from dom_opt_finalize_block.
2770
        (restore_vars_to_originalvalue): Likewise.
2771
        (extract_true_false_edges_from_block): Likewise.
2772
        (thread_across_edge): Handle if (cond) too.
2773
        (dom_opt_finalize_block): Use new functions.  Handle if (cond).
2774
 
2775
        * tree-ssa-dom.c (thread_across_edge): Accept dom_walk argument.
2776
        Record temporary equivalences created by PHIs and temporarily
2777
        const/copy propagate into conditionals.
2778
        (dom_opt_finalize_block): Thread across an edge to a dominated block
2779
        if the dominated block has PHIs.  Remove temporary equivalenecs
2780
        created by PHIs in thread_across_edge.  Update code to restore the
2781
        various hash tables to use the actual varray rather than a local
2782
        copy of the varray.
2783
        (simplify_rhs_and_lookup_avail_expr): Set the condition's code
2784
        before settings its operands.
2785
 
2786
        * tree-ssa.c (create_temp): Use add_referenced_var rather than
2787
        an incomplete inline of its behavior.  Also make sure to
2788
        set is_dereferenced_{load,store}, is_call_clobbered and is_stored.
2789
 
2790
        * tree-ssa-live.c (build_tree_conflict_graph): Correctly handle
2791
        case where the result of a PHI is unused.
2792
 
2793
2004-01-15  Diego Novillo  
2794
 
2795
        * cfghooks.c (predicted_by_p): Add missing return.
2796
 
2797
2004-01-15  Richard Henderson  
2798
 
2799
        * tree-ssa-dom.c (optimize_stmt): Dump new statement if
2800
        folding succeeded.
2801
 
2802
2004-01-15  Kazu Hirata  
2803
 
2804
        * tree-cfg.c: Fix comment typos.
2805
        * tree-eh.c: Likewise.
2806
        * tree-inline.c: Likewise.
2807
        * tree-optimize.c: Likewise.
2808
        * tree-ssa.c: Likewise.
2809
        * tree-ssa-dom.c: Likewise.
2810
        * tree-ssa-operands.c: Likewise.
2811
        * tree-ssa-pre.c: Likewise.
2812
        * tree-tailcall.c: Likewise.
2813
 
2814
2004-01-14  Jan Hubicka  
2815
 
2816
        * basic-block.h: Include predict.h
2817
        (tree_predicted_by_p, rtl_predicted_by_p,  rtl_predict_edge,
2818
        predict_edge_def): Declare.
2819
        * cfghooks.h (cfg_hooks): add predict_edge and predicted_by_p
2820
        (predict_edge, predicted_by_p): Declare.
2821
        * cfghooks.c (predict_edge, predicted_by_p): Declare.
2822
        * cfgrtl (rtl_cfg_hooks, cfg_layout_rtl_cfg_hook): Add new hooks.
2823
        * cse.c (struct cse_basic_block_data): Rename enum values to not
2824
        conflict with profile.h; update all uses.
2825
        * predict.c:  Include tree-flow.h, ggc.h, tree-dump.h
2826
        (predicted_by_p): Rename to ...
2827
        (rtl_predicted_by_p): .. this one; make global
2828
        (tree_predicted_by_p): New.
2829
        (dump_prediction): Add FILE argument.
2830
        (predict_edge): Rename to ...
2831
        (rtl_predict_edge): .. this one.
2832
        (tree_predict_edge): New.
2833
        (combine_predictions_for_insn): Update calls of predict_edge.
2834
        (predict_loops): Break out from ...
2835
        (estimate_probability): ... here; update comments; move updating
2836
        of unknown probabilities from ...
2837
        (estimate_bb_frequencies): ... here.
2838
        (combine_predictions_for_bb): New.
2839
        (tree_predict_by_opcode): New.
2840
        (tree_estimate_probability): New.
2841
        * predict.def (PRED_TREE_POINTER, PRED_TREE_OPCODE_POSITIVE,
2842
        PRED_TREE_OPCODE_NONEQUAL, PRED_TREE_FPOPCODE): New predictors.
2843
        * predict.h: Add include guard.
2844
        (predict_edge, predict_edge_def): Move prototypes to basic_block.h
2845
        * tree-cfg.c (tree_cfg_hooks): Add prediction hooks.
2846
        * tree-dump.c (dump_files): Add profile.
2847
        * tree-flow.h (struct edge_prediction): New structure.
2848
        (struct bb_ann_d): Add field predictions.
2849
        (tree_estimate_probability): Declare.
2850
        * tree-optimize.c (optimize_function_tree): Call tree_estimate_probability.
2851
        * tree.h (tree_dump_index): Add TDI_profile.
2852
        * tree-pass.h (pass_profile): Declare.
2853
 
2854
2004-01-14  Zdenek Dvorak  
2855
 
2856
        * basic-block.h (find_basic_blocks, cleanup_cfg,
2857
        delete_unreachable_blocks, merge_seq_blocks): Declare.
2858
        * cfgcleanup.c (merge_seq_blocks): New.
2859
        * output.h (find_basic_blocks, cleanup_cfg, delete_unreachable_blocks):
2860
        Declarations moved to basic-block.h.
2861
        * tree-cfg.c (tree_merge_blocks, tree_can_merge_blocks_p): New.
2862
        (cleanup_tree_cfg): Call merge_seq_blocks.
2863
        (tree_cfg_hooks): Add tree_can_merge_blocks_p and tree_merge_blocks.
2864
 
2865
2004-01-14  Zdenek Dvorak  
2866
 
2867
        * tree-cfg.c (tree_make_forwarder_block): Fix.
2868
 
2869
2004-01-14  Richard Henderson  
2870
 
2871
        * tree-complex.c: New file.
2872
        * Makefile.in (OBJS-common): Add it.
2873
        * tree-pass.h (pass_lower_complex): New.
2874
        * tree-optimize.c (init_tree_optimization_passes): Add it.
2875
 
2876
2004-01-14  Zdenek Dvorak  
2877
 
2878
        * Makefile.in (tree-ssa-loop.o): Add cfgloop.h dependency.
2879
        (cfghooks.o): Add TIMEVAR_H and toplev.h dependency.
2880
        * basic-block.h (struct edge_def): Use ir_type instead testing of
2881
        cfg_hooks directly.
2882
        (tidy_fallthru_edge, tidy_fallthru_edges, dump_bb, verify_flow_info):
2883
        Declaration removed.
2884
        * cfg.c (verify_flow_info, dump_bb): Moved to cfghooks.c.
2885
        * cfgcleanup.c (try_simplify_condjump): Changed due to change of
2886
        tidy_fallthru_edge.
2887
        * cfghooks.c: Include timevar.h and toplev.h.
2888
        (cfg_hooks): Made static.
2889
        (tree_register_cfg_hooks, ir_type): New.
2890
        (verify_flow_info, dump_bb): Moved from cfg.c.
2891
        (redirect_edge_and_branch, redirect_edge_and_branch_force,
2892
        split_block, split_block_after_labels, move_block_after,
2893
        delete_basic_block, split_edge, create_basic_block,
2894
        create_empty_bb, can_merge_blocks_p, merge_blocks,
2895
        make_forwarder_block, tidy_fallthru_edge, tidy_fallthru_edges): New.
2896
        * cfghooks.h (struct cfg_hooks): Modified.
2897
        (redirect_edge_and_branch, redirect_edge_and_branch_force, split_block,
2898
        delete_basic_block, split_edge, create_basic_block, can_merge_blocks_p,
2899
        merge_blocks, make_forwarder_block): Changed into functions.
2900
        (loop_optimizer_init, loop_optimizer_finalize): Removed.
2901
        (HEADER_BLOCK, LATCH_EDGE): Moved into cfgloop.c.
2902
        (tidy_fallthru_edge, tidy_fallthru_edges, create_empty_bb,
2903
        verify_flow_info, dump_bb, ir_type): Declare.
2904
        (cfg_layout_rtl_cfg_hooks): Declare.
2905
        * cfglayout.c (copy_bbs): Don't call add_to_dominance_info.
2906
        * cfgloop.c (HEADER_BLOCK, LATCH_EDGE): Moved from cfghooks.h.
2907
        (update_latch_info, mfb_keep_just, mfb_keep_nonlatch): New functions.
2908
        (canonicalize_loop_headers): Use new semantics of make_forwarder_block.
2909
        * cfgloop.h (rtl_loop_optimizer_init, rtl_loop_optimizer_finalize):
2910
        Removed.
2911
        (loop_optimizer_init, loop_optimizer_finalize): Declare.
2912
        * cfgloopmanip.c (split_loop_bb): Don't update dominators.
2913
        (remove_bbs): Don't call remove_bbs.
2914
        (create_preheader): Use make_forwarder_block.
2915
        (mfb_keep_just, mfb_update_loops): New static functions.
2916
        * cfgrtl.c (cfg_layout_split_block, rtl_split_block,
2917
        rtl_make_forwarder_block, rtl_create_basic_block,
2918
        rtl_delete_block, rtl_split_block, rtl_merge_blocks,
2919
        tidy_fallthru_edge, rtl_split_edge, cfg_layout_merge_blocks,
2920
        cfg_layout_split_edge): Parts not specific to rtl moved to cfghooks.c
2921
        (tidy_fallthru_edges): Moved to cfghooks.c.
2922
        (rtl_move_block_after): New.
2923
        (redirect_edge_with_latch_update, update_cfg_after_block_merging):
2924
        Removed.
2925
        (rtl_cfg_hooks, cfg_layout_rtl_cfg_hooks): Modified.
2926
        * ifcvt.c (merge_if_block, find_cond_trap, find_if_case_1,
2927
        find_if_case_2): Don't update dominators.
2928
        * loop-init.c (rtl_loop_optimizer_init, rtl_loop_optimizer_finalize):
2929
        Replaced by rtl_loop_optimizer_init and rtl_loop_optimizer_finalize.
2930
        * loop-unswitch.c (unswitch_loop): Don't call add_to_dominance_info.
2931
        * toplev.c (rest_of_handle_loop2): Enter cfglayout mode here.
2932
        * tree-cfg.c (create_bb): Modified to suit create_basic_block hook.
2933
        (tree_redirect_edge_and_branch_1): Merged into
2934
        tree_redirect_edge_and_branch.
2935
        (create_blocks_annotations): Removed.
2936
        (tree_loop_optimizer_init, tree_loop_optimizer_finalize): Removed.
2937
        (tree_make_forwarder_block, remove_bb, tree_split_edge,
2938
        tree_redirect_edge_and_branch, tree_split_block,
2939
        tree_move_block_after): Partially moved to cfghooks.c.
2940
        (tree_duplicate_bb): New.
2941
        (PENDING_STMT): Moved to tree-flow.h.
2942
        (tree_register_cfg_hooks): Moved to cfghooks.c.
2943
        (build_tree_cfg): Don't call create_blocks_annotations.
2944
        (factor_computed_gotos, make_blocks): Use create_empty_bb.
2945
        (cleanup_tree_cfg): Use delete_unreachable_blocks.
2946
        (remove_unreachable_blocks, insert_bb_before): Removed.
2947
        (remove_phi_nodes_and_edges_for_unreachable_block): Modified.
2948
        (tree_find_edge_insert_loc, thread_jumps): Use cfg hooks.
2949
        (bsi_commit_edge_inserts): Update_annotations argument removed.
2950
        (tree_cfg_hooks): Modified.
2951
        * tree-flow.h (PENDING_STMT): Moved from tree-cfg.c.
2952
        (insert_bb_before, remove_unreachable_blocks,
2953
        remove_phi_nodes_and_edges_for_unreachable_block, tree_split_edge):
2954
        Declaration removed.
2955
        (bsi_commit_edge_inserts): Declaration changed.
2956
        (tree_duplicate_bb): Declare.
2957
        * tree-sra.c (scalarize_structures): Changed due to
2958
        bsi_commit_edge_inserts change.
2959
        * tree-ssa-dom.c (tree_ssa_dominator_optimize): Use
2960
        delete_unreachable_blocks.
2961
        * tree-ssa-loop.c: Include cfgloop.h.
2962
        * tree-ssa-pre.c (split_critical_edges, tree_perform_ssapre): Use cfg
2963
        hooks.
2964
        * tree-ssa.c (rewrite_trees, rewrite_vars_out_of_ssa): Changed due to
2965
        bsi_commit_edge_inserts change.
2966
        (ssa_redirect_edge): Record the phi arguments on the redirected edge.
2967
        * tree-tailcall.c (eliminate_tail_call): Clean stored phi arguments.
2968
 
2969
2004-01-13  Richard Henderson  
2970
 
2971
        * gimplify.c (gimplify_lhs_complex_part_expr): Remove.
2972
        (gimplify_modify_expr): Don't call it.
2973
 
2974
        * tree-alias-common.c (HAVE_BANSHEE): Make sure it's defined.
2975
        (pass_build_pta): Set name.
2976
 
2977
2004-01-13  Zdenek Dvorak  
2978
 
2979
        * tree-tailcall.c (eliminate_tail_call): Add phi nodes for the call
2980
        vdefs.
2981
        (find_tail_calls): Ignore returns with virtual operands.
2982
 
2983
2004-01-12  Richard Henderson  
2984
 
2985
        * tree-pass.h: New file.
2986
        * gimple-low.c: Include tree-pass.h.
2987
        (lower_function_body): Make static, take no arguments.  Set
2988
        dont_emit_block_notes and call reset_block_changes here.
2989
        (pass_lower_cf): New.
2990
        * toplev.c (general_init): Call init_tree_optimization_passes.
2991
        * toplev.h (init_tree_optimization_passes): Declare.
2992
        * tree-alias-ander.c: Include tree-pass.h.
2993
        (tree_dump_file, tree_dump_flags): Remove.
2994
        (andersen_init): Don't dump_begin.
2995
        (andersen_cleanup): Don't dump_end.
2996
        * tree-alias-common.c: Include tree-pass.h, timevar.h.
2997
        (currptadecl): Remove.
2998
        (create_alias_vars): Make static, take no args.  Tidy ifdefs.
2999
        (delete_alias_vars): Likewise.  Protect vs PTA_ANDERSEN.
3000
        (pass_build_pta, pass_del_pta): New.
3001
        * tree-alias-common.h (create_alias_vars): Delete decl.
3002
        (delete_alias_vars): Likewise.
3003
        * tree-cfg.c: Include tree-pass.h.
3004
        (tree_dump_file, tree_dump_flags): Remove.
3005
        (build_tree_cfg): Don't timevar, do init_flow.  Ensure one bb.
3006
        Don't dump the function here.
3007
        (execute_build_cfg, pass_build_cfg): New.
3008
        (remove_useless_stmts): Make static, take no arguments.
3009
        (pass_remove_useless_stmts): New.
3010
        (remove_bb): Don't open the dump file.
3011
        * tree-dfa.c: Include tree-pass.h.
3012
        (tree_dump_file, tree_dump_flags): Remove.
3013
        (find_referenced_vars): Make static, take no args.  Do init_tree_ssa.
3014
        (compute_may_aliases): Similarly.  Don't timevar or open dump file.
3015
        Don't delete_alias_vars here.
3016
        (pass_referenced_vars, pass_may_alias): New.
3017
        * tree-dump.c (dump_files): Remove optimization dumps.
3018
        (extra_dump_files, extra_dump_files_in_use): New.
3019
        (extra_dump_files_alloced): New.
3020
        (dump_register): New.
3021
        (get_dump_file_info): New.
3022
        (dump_begin, dump_enabled_p, dump_flag_name): Use it.
3023
        (dump_enable_all): Handle extra_dump_files.
3024
        (dump_switch_p_1): Split out from dump_switch_p.
3025
        (dump_switch_p): Handle extra_dump_files.
3026
        * tree-dump.h (dump_register): Declare.
3027
        * tree-eh.c: Include tree-pass.h
3028
        (lower_eh_constructs): Make static, take no args.  Don't timevar,
3029
        don't dump function.
3030
        (pass_lower_eh): New.
3031
        * tree-flow.h (remove_useless_stmts, find_referenced_vars,
3032
        compute_may_aliases, lower_function_body, rewrite_out_of_ssa,
3033
        tree_ssa_ccp, tree_ssa_dominator_optimize, tree_ssa_dce,
3034
        tree_ssa_loop_opt, lower_eh_constructs, tree_sra): Remove.
3035
        (rewrite_into_ssa): Update decl.
3036
        * tree-mudflap.c: Include tree-pass.h.
3037
        (mudflap_function_decls): Make static, take no args, don't process
3038
        functions with mf_marked_p.
3039
        (mudflap_function_ops): Likewise.
3040
        (gate_mudflap, pass_mudflap_1, pass_mudflap_2): New.
3041
        (mudflap_enqueue_decl): Don't open dump file.
3042
        (mudflap_enqueue_constant): Likewise.
3043
        * tree-nomudflap.c: Include tree-pass.h.
3044
        (mudflap_c_function_decls, mudflap_c_function_ops): Remove.
3045
        (pass_mudflap_1, pass_mudflap_2): New.
3046
        * tree-optimize.c: Include tree-pass.h.
3047
        (optimize_function_tree): Remove.
3048
        (tree_dump_file, tree_dump_flags, vars_to_rename): New.
3049
        (all_passes): New.
3050
        (execute_gimple, pass_gimple): New.
3051
        (execute_rebuild_bind, pass_rebuild_bind): New.
3052
        (gate_all_optimizations, pass_all_optimizations): New.
3053
        (execute_del_cfg, pass_del_cfg): New.
3054
        (register_one_dump_file, register_dump_files): New.
3055
        (dup_pass_1, init_tree_optimization_passes): New.
3056
        (current_properties, last_verified): New.
3057
        (execute_todo, execute_one_pass, execute_pass_list): New.
3058
        (tree_rest_of_compilation): Remove -O0 passes.
3059
        * tree-sra.c: Include tree-pass.h, flags.h.
3060
        (tree_dump_file, tree_dump_flags, vars_to_rename): Remove.
3061
        (tree_sra): Make static, take no args.  Don't timevar or dump file.
3062
        (gate_sra, pass_sra): New.
3063
        * tree-ssa-ccp.c: Include tree-pass.h, flags.h.
3064
        (tree_dump_file, tree_dump_flags): New.
3065
        (tree_ssa_ccp): Make static, take no args.  Don't timevar or dump file.
3066
        (gate_ccp, pass_ccp): New.
3067
        (substitute_and_fold): Take no args.
3068
        * tree-ssa-dce.c: Include tree-pass.h, flags.h.
3069
        (tree_dump_file, tree_dump_flags): New.
3070
        (tree_ssa_dce): Make static, take no args.  Don't open dump file.
3071
        (gate_dce, pass_dce): New.
3072
        * tree-ssa-dom.c: Include tree-pass.h, flags.h.
3073
        (tree_dump_file, tree_dump_flags, vars_to_rename): Remove.
3074
        (tree_ssa_dominator_optimize): Make static, take no args, don't
3075
        timevar, don't dump file.
3076
        (gate_dominator, pass_dominator): New.
3077
        * tree-ssa-loop.c: Include tree-pass.h, flags.h.
3078
        (tree_dump_file, tree_dump_flags): Remove.
3079
        (tree_ssa_loop_opt): Make static, take no args, don't open dump file.
3080
        (gate_loop, pass_loop): New.
3081
        * tree-ssa-pre.c: Include tree-pass.h, flags.h.
3082
        (tree_dump_file, tree_dump_flags): Remove.
3083
        (execute_pre): Rename from tree_perform_ssapre, make static,
3084
        take no args, don't timevar, don't open dump file, don't allocate
3085
        vars_to_rename.
3086
        (gate_pre, pass_pre): New.
3087
        * tree-ssa.c: Include tree-pass.h.
3088
        (tree_dump_file, tree_dump_flags, vars_to_rename): Remove.
3089
        (rewrite_into_ssa): Take no arguments, don't open dump file.
3090
        (rewrite_out_of_ssa): Make static, take no args, don't timevar,
3091
        don't open dump file.  Disable TER if mudflap.
3092
        (pass_build_ssa, pass_del_ssa): New.
3093
        * tree-tailcall.c: Include tree-pass.h, flags.h.
3094
        (tree_dump_file, tree_dump_flags): Remove.
3095
        (tree_optimize_tail_calls_1): Rename from tree_optimize_tail_calls.
3096
        Make static, take only opt_tailcalls, don't dump file.
3097
        (execute_tail_recursion, gate_tail_calls, execute_tail_calls): New.
3098
        (pass_tail_recursion, pass_tail_calls): New.
3099
        * tree.h (enum tree_dump_index): Remove optimization dumps.
3100
        * Makefile.in (tree-alias-ander.o, tree-alias-common.o, tree-ssa.o,
3101
        tree-ssa-dom.o, tree-ssa-pre.o, tree-cfg.o, tree-tailcall.o,
3102
        tree-dfa.o, tree-eh.o, tree-ssa-loop.o, tree-optimize.o, gimple-low.o,
3103
        tree-mudflap.o, tree-ssa-dce.o, tree-ssa-ccp.o, tree-sra.o: Update
3104
        dependencies.
3105
 
3106
2004-01-12  Frank Ch. Eigler  
3107
 
3108
        * tree-mudflap.c (mf_xform_derefs): Restore instrumentation of
3109
        RETURN_EXPRs.
3110
 
3111
2004-01-11  Jan Hubicka  
3112
 
3113
        * tree-cfg.c (remove_usless_stmts_cond):  Fold statement.
3114
        (remove_useless_stmts_1):  Fold trees we know how to fold.
3115
 
3116
2004-01-09  Richard Henderson  
3117
 
3118
        * gimplify.c (gimplify_constructor): Merge into ...
3119
        (gimplify_init_constructor): ... here.  Handle COMPLEX_TYPE and
3120
        VECTOR_TYPE.
3121
        (gimplify_lhs_complex_part_expr): New.
3122
        (gimplify_modify_expr): Call it.
3123
        * tree-simple.c (is_gimple_rhs): Accept COMPLEX_EXPR.
3124
        * c-pretty-print.c (pp_c_initializer): Accept any type CONSTRUCTOR.
3125
        (pp_c_initializer_list): Fix code expectations for VECTOR_TYPE and
3126
        COMPLEX_TYPE.
3127
 
3128
2004-01-09  Steven Bosscher  
3129
 
3130
        PR optimization/13599
3131
        * tree-cfg.c (remove_useless_stmts_cond): Clear last-goto
3132
        before returning.
3133
 
3134
2004-01-09  Richard Henderson  
3135
 
3136
        * gimplify.c (gimplify_asm_expr): Fix ordering of ASM_INPUTS.
3137
 
3138
2004-01-09  Jan Hubicka  
3139
 
3140
        * cgraph.h (cgraph_clone_inlined_nodes): Declare.
3141
        * cgraphunit.c (cgrpah_clone_inlined_nodes): Make global.
3142
        (cgraph_mark_inline_edge): Sanity check that size is positive.
3143
        (cgraph_decide_inlining): Fix typo.
3144
        * tree-optimize.c (tree_rest_of_compilation): Fix node duplication
3145
        code.
3146
 
3147
2004-01-09  Jan Hubicka  
3148
 
3149
        * tree-inline.c (estimate_num_insns_1): Fix.
3150
 
3151
2004-01-09  Richard Henderson  
3152
 
3153
        * tree-alias-ander.c, tree-cfg.c, tree-dfa.c, tree-mudflap.c,
3154
        tree-sra.c, tree-ssa-ccp.c, tree-ssa-dce.c, tree-ssa-dom.c,
3155
        tree-ssa-loop.c, tree-ssa-pre.c, tree-ssa.c, tree-tailcall.c: Rename
3156
        dump_file and dump_flags to tree_dump_file/flags.
3157
 
3158
2004-01-08  Frank Ch. Eigler  
3159
 
3160
        * tree-mudflap.c (mf_build_string): Properly mf_mark string.
3161
        (mf_varname_tree): Remove redundant marking.
3162
        * tree-optimize.c (tree_rest_of_compilation): Skip mudflap processing
3163
        of mf_marked functions.
3164
        * c-mudflap.c (mflang_flush_calls): mf_mark synthetic function.
3165
 
3166
2004-01-07  Diego Novillo  
3167
 
3168
        * Makefile.in (OBJS-common): Remove tree-must-alias.o
3169
        (tree-must-alias.o): Remove.
3170
        * common.opt (ftree-must-alias): Remove.
3171
        * flags.h (flag_tree_must_alias): Remove.  Update all users.
3172
        * timevar.def (TV_TREE_MUST_ALIAS): Remove.
3173
        * toplev.c (f_options): Remove entry for -ftree-must-alias.
3174
        * tree-alias-common.c (local_alias_vars): Add GTY marker.
3175
        (local_alias_varnums): Likewise.
3176
        * tree-dfa.c (aliases_computed_p): Declare.
3177
        (dump_variable): Show variable UID and dereferenced bits.
3178
        (compute_may_aliases): Add arguments 'vars_to_rename' and 'phase'.
3179
        Do not call create_alias_vars.
3180
        Call promote_call_clobbered_vars
3181
        Do debugging dumps.
3182
        Set 'aliases_computed_p' to true before returning.
3183
        (create_memory_tags): Call may_be_aliased.
3184
        Mark new memory tags for renaming.
3185
        (compute_alias_sets): Don't do debugging dumps.
3186
        (find_variable_in): Move from tree-must-alias.c
3187
        (remove_element_from): Likewise.
3188
        (find_addressable_vars): Likewise
3189
        (promote_call_clobbered_vars): New.
3190
        (get_memory_tag_for): Mark the tag volatile if the pointed-to type
3191
        is volatile.
3192
        * tree-dump.c (dump_files): Remove entry for tree-mustalias.
3193
        Add entries for tree-ssa7, tree-dom3 and tree-dce3.
3194
        * tree-flow-inline.h (may_be_aliased): New.
3195
        * tree-flow.h (may_be_aliased): Declare.
3196
        (aliases_computed_p): Declare.
3197
        (tree_compute_must_alias): Remove.
3198
        * tree-must-alias.c: Remove.
3199
        * tree-optimize.c: Include tree-alias-common.h.
3200
        (optimize_function_tree): Call create_alias_vars before going into
3201
        SSA form.
3202
        Do not compute aliases until after the first DOM and DCE passes.
3203
        Run DOM and DCE once more after computing may-aliases.
3204
        * tree-ssa-dom.c (propagate_copy): Merge the dereferenced bit flags
3205
        when copy propagating pointers.
3206
        * tree-ssa-operands.c (get_stmt_operands): Assume that the
3207
        statement has no volatile operands.
3208
        (get_expr_operands): When processing an INDIRECT_REF expressions,
3209
        mark the statement as having volatile operands if aliases have not
3210
        been computed.
3211
        (add_stmt_operand): If the variable may be aliased and aliasing has
3212
        not been computed yet, mark the statement as having volatile
3213
        operands.
3214
        * tree-ssa.c (init_tree_ssa): Set aliases_computed_p to false.
3215
        (delete_tree_ssa): Likewise.
3216
        * tree.h (tree_dump_index): Remove TDI_mustalias.
3217
        Add TDI_dom_3, TDI_ssa_7 and TDI_dce_3.
3218
        * doc/invoke.texi: Remove must-alias documentation.
3219
 
3220
2004-01-07  Jeff Law  
3221
 
3222
        * tree-ssa-dce.c (find_useful_stmts): Do not consider PHIs for
3223
        virtual operands inherently necessary.
3224
 
3225
2004-01-07  Zdenek Dvorak  
3226
 
3227
        * tree-dfa.c (free_df_for_stmt, free_df): New functions.
3228
        (compute_immediate_uses_for_stmt): Record uses in VDEFs.
3229
        * tree-flow.h (free_df, kill_redundant_phi_nodes): Declare.
3230
        * tree-optimize.c (optimize_function_tree): Call
3231
        kill_redundant_phi_nodes.
3232
        * tree-ssa-ccp.c (finalize): Call free_df.
3233
        * tree-ssa.c (replace_immediate_uses, raise_value,
3234
        kill_redundant_phi_nodes): New functions.
3235
 
3236
2004-01-06  Jeff Law  
3237
 
3238
        * tree.h (FUNCTION_RECEIVES_NONLOCAL_GOTO): Kill.
3239
        * tree-cfg.c (make_exit_edges, is_ctrl_altering_stmt):  Use
3240
        current_function_has_nonlocal_label instead of
3241
        FUNCTION_RECEIVES_NONLOCAL_GOTO.
3242
        * gimplify.c (gimplify_expr): Set has_nonlocal_label in the
3243
        appropriate function's struct function rather than setting
3244
        a bit in the FUNCTION_DECL.
3245
 
3246
2004-01-06  Jan Hubicka  
3247
 
3248
        * expr.c (string_constant): Recognize array_ref.
3249
 
3250
2004-01-06  Richard Henderson  
3251
 
3252
        * builtins.c (builtin_save_expr): New.
3253
        (expand_builtin_mathfn, expand_builtin_mathfn_2,
3254
        expand_builtin_strcmp, expand_builtin_strncmp,
3255
        expand_builtin_strcat, fold_builtin_cabs): Use it.
3256
 
3257
2004-01-06  Jan Hubicka  
3258
 
3259
        * fold-const.c (fold): Do not rebuild comparison when nothing
3260
        changed.
3261
 
3262
2004-01-05  Jan Hubicka  
3263
 
3264
        * tree-ssa-ccp.c (ccp_fold_builtin): Return early for builtins
3265
        taking no arugment.
3266
 
3267
2004-01-05  Steven Bosscher  
3268
 
3269
        * tree-ssa-dce.c: Clean up whitespace.
3270
 
3271
        * tree-cfg.c (tree_verify_flow_info): Fix complaint about
3272
        missing or wrong labels in the targets of a conditional branch.
3273
 
3274
2004-01-05  Richard Henderson  
3275
 
3276
        * tree-ssa-dom.c (record_equivalences_from_incoming_edge): Check
3277
        for signed zeros before recording value.
3278
        * Makefile.in (tree-ssa-dom.o): Depend on real.h.
3279
 
3280
2004-01-05  Jeff Law  
3281
 
3282
        * tree-ssa-dom.c (cprop_into_stmt): Remove hack which prevented
3283
        copy propagation into statements with virtual operands, but no
3284
        real operands.
3285
 
3286
        * tree-ssa-dom.c (tree_ssa_dominator_optimize): Correctly handle
3287
        the case where an edge we wish to redirect is split by the out of SSA
3288
        code.
3289
 
3290
2004-01-05  Richard Henderson  
3291
 
3292
        * c-tree.h (struct lang_type): Add enum_min, enum_max.
3293
        * c-decl.c (finish_enum): Set them.  Set TYPE_MIN/MAX_VALUE to
3294
        the limits of the compatible type, not to the enumerators.
3295
        (check_bitfield_type_and_width): Use them.
3296
        (finish_struct): Clear allocated struct lang_type.
3297
        * gimplify.c (gimplify_switch_expr): Remove special handling of
3298
        outer cast in a switch.
3299
        * tree-ssa-dom.c (record_equivalences_from_incoming_edge): Likewise.
3300
 
3301
2004-01-05  Daniel Berlin  
3302
 
3303
        * tree-ssa-pre.c (added_phis): Removed.
3304
        Remove gt-tree-ssa-pre.h.
3305
        (process_left_occs_and_kills): ASM_EXPR's block load pre.
3306
 
3307
        * Makefile.in (GTFILES): Don't process tree-ssa-pre.c.
3308
        gt-tree-ssa-pre.h isn't a gtfile anymore.
3309
 
3310
2004-01-05  Andrew Pinski  
3311
 
3312
        * config.gcc (powerpc-*-darwin*): Make libbanshee rebuild
3313
        on PPC darwin.
3314
 
3315
2004-01-05  Richard Henderson  
3316
 
3317
        * gimplify.c (gimplify_expr): Move check for error_mark inside
3318
        the main loop.
3319
 
3320
2004-01-04  Jan Hubicka  
3321
 
3322
        * Makefile.in (cgraph.o, cgraphunit.o): Add intl.h dependency.
3323
        * cgraph.c (create_edge, dump_cgraph): Update to use inline_failed
3324
        * cgraph.h (cgraph_edge): Replace inline_call by inline_failed
3325
        (cgraph_inline_p): Add extra argument reason.
3326
        * cgraphunit.c: Minor formating fixes.
3327
        cgraph_first_inlined_callee): New functions.
3328
        (record_call_1): Record builtins too.
3329
        (cgraph_analyze_function): Update inline_failed messages.
3330
        (cgraph_mark_functions_to_output, cgraph_expand_function, cgraph_inlined_into,
3331
        cgraph_inlined_callees, cgraph_estimate_growth): Update to use inline_failed.
3332
        (cgraph_check_inline_limits): Likewise; Add argument reason.
3333
        (cgraph_set_inline_failed): New static function.
3334
        (cgraph_decide_inlining_of_small_function, cgraph_decide_inlining): Set
3335
        reasons.
3336
        (cgraph_inline_p): Add new argument reason.
3337
        * tree-inline.c (expand_call_inline):  Update warning.
3338
 
3339
2004-01-04  Andreas Jaeger  
3340
 
3341
        * common.opt: Re-order some options in ASCII collating orders.
3342
 
3343
2004-01-03  Richard Henderson  
3344
 
3345
        * toplev.c (rest_of_compilation): Fixup merge error wrt
3346
        check_function_return_warnings.
3347
 
3348
        * tree.h (FUNCTION_RECEIVES_NONLOCAL_GOTO): Use unsigned_flag.
3349
 
3350
2004-01-02  Jan Hubicka  
3351
 
3352
        * c-decl.c (duplicate_decls):  Output DIE of extern inline function
3353
        only when it can be inlined.
3354
        * c-objc-common.c (c_disregard_inline_limits):  When not inlining
3355
        extern inline functions do not disregard.
3356
        * cgraphunit.c (cgraph_analyze_function): When not inlining do not set
3357
        inline.
3358
        (cgraph_decide_inlining): Limit work done when not inlining.
3359
        (cgrpah_decide_inlining_incrementally): Likewise.
3360
        * tree-optimize.c (tree_rest_of_compilation): Do not call
3361
        optimize_inline_calls
3362
        when there is nothing to inline.
3363
 
3364
2004-01-01  Richard Henderson  
3365
 
3366
        * c-common.c (c_expand_expr): Don't handle STMT_EXPR.
3367
        * c-objc-common.c (c_objc_common_finish_file): Use expand_expr.
3368
        * c-semantics.c (lang_expand_stmt, lang_expand_decl_stmt,
3369
        expand_cond, genrtl_do_pushlevel, genrtl_goto_stmt, genrtl_expr_stmt,
3370
        genrtl_expr_stmt_value, genrtl_decl_stmt, genrtl_if_stmt,
3371
        genrtl_while_stmt, genrtl_do_stmt_1, genrtl_do_stmt,
3372
        genrtl_return_stmt, genrtl_for_stmt, genrtl_break_stmt,
3373
        genrtl_continue_stmt, genrtl_scope_stmt, genrtl_switch_stmt,
3374
        genrtl_case_label, genrtl_compound_stmt, genrtl_asm_stmt,
3375
        genrtl_cleanup_stmt, expand_stmt, find_reachable_label,
3376
        find_reachable_label_1, expand_unreachable_if_stmt,
3377
        expand_unreachable_stmt): Remove.
3378
        * c-common.h: Update.
3379
 
3380
2003-12-31  Richard Henderson  
3381
 
3382
        * c-mudflap.c (mflang_register_call): Remove.
3383
        (mflang_flush_calls): Use start_function/finish_function.
3384
        * tree-mudflap.c (mf_init_extern_trees): Tidy.
3385
        (mf_decl_cache_locals): Fix chaining for empty body.
3386
        (deferred_static_decl_labels): Remove.
3387
        (deferred_static_decls_init): Remove.
3388
        (mudflap_register_call): New.
3389
        (mudflap_enqueue_decl): Use it.  Remove label argument.
3390
        (mudflap_enqueue_constant): Likewise.
3391
        (mudflap_finish_file): Update to match.
3392
        * tree-mudflap.h (mudflap_enqueue_decl): Remove label argument.
3393
        (mudflap_enqueue_constant): Likewise.
3394
        (mflang_register_call): Remove.
3395
        * tree-nomudflap.c (mudflap_enqueue_decl): Remove label argument.
3396
        (mudflap_enqueue_constant): Likewise.
3397
        * tree-optimize.c (tree_ssa_finish): Don't create NULL bodies.
3398
        * varasm.c (make_decl_rtl): Update mudflap_enqueue_decl call.
3399
        (output_constant_def_contents): Similarly for mudflap_enqueue_constant.
3400
 
3401
2003-12-26  Sebastian Pop  
3402
 
3403
        * tree-cfg.c (print_loop, print_pred_bbs, print_succ_bbs,
3404
        debug_loop_ir, print_loop_ir): New.
3405
        * tree-flow.h (debug_loop_ir, print_loop_ir): Declare.
3406
 
3407
2003-12-23  Jeff Law  
3408
 
3409
        * tree-cfg.c (tree_find_edge_insert_loc): Do not use the target
3410
        block as an insertion location if the target block has PHI nodes.
3411
 
3412
2003-12-23  Jan Hubicka  
3413
 
3414
        * cgraphunit.c (cgraph_mark_inline): Accept argument edge; return
3415
        next edge not redirected.
3416
        (cgraph_recursive_inlining_p): Simplify.
3417
        (cgraph_decide_inlining*): Update calls of cgraph_mark_inline.
3418
 
3419
2003-12-22  Toon Moene  
3420
 
3421
        * tree-alias-common.c (find_func_aliases): Do not call
3422
        intra_function_call for languages assuring no aliasing between
3423
        arguments (by themselves) and global memory.
3424
 
3425
2003-12-21  Jan Hubicka  
3426
 
3427
        * tree-ssa-ccp.c (fold_stmt): Return when there is no RHS
3428
        (get_rhs): Return for RETURN_EXPR with no operand.
3429
 
3430
2003-12-21  Zdenek Dvorak  
3431
 
3432
        * tree-cfg.c (tree_make_forwarder_block): Use split_block.
3433
        (tree_split_block): New.
3434
        (tree_cfg_hooks): Add tree_split_block.
3435
        (tree_loop_optimizer_init):  Enable force_single_succ_latches.
3436
        * cfgloopmanip.c (loop_split_edge_with): Don't update dominators.
3437
        * cfgrtl.c (rtl_split_edge, cfg_layout_split_edge): Update dominators.
3438
 
3439
2003-12-19  Daniel Berlin  
3440
 
3441
        * tree-dfa.c (alias_stats_d): New structure.
3442
        (alias_stats): New variable.
3443
        (create_memory_tags): Zero out alias_stats.
3444
        (dump_alias_stats): New function.
3445
        (compute_alias_sets): Call it if TDF_STATS is set.
3446
        (may_alias_p): Collect the various statistics.
3447
 
3448
2003-12-19  Diego Novillo  
3449
 
3450
        * gimple-low.c (expand_var_p): Always expand volatiles.
3451
        * tree-dfa.c (find_referenced_vars): Move up in the file.
3452
        (create_memory_tags): New local function.
3453
        (compute_may_aliases): Call it.
3454
        (add_referenced_var): Move code to create memory tags and create
3455
        aliasing arrays to create_memory_tags.
3456
        (get_memory_tag_for): Don't mark memory tags volatile.  Mark them
3457
        addressable.
3458
        * tree-flow.h (var_ann_d): Add bitfields is_dereferenced_store and
3459
        is_dereferenced_load.
3460
        (add_call_clobbered_var): Remove.
3461
        * tree-ssa-operands.c (check_optype_freelist): Mark arguments
3462
        unused.
3463
        (add_optype_freelist): Likewise.
3464
        (add_stmt_operand): Don't add operands for volatile variables.
3465
 
3466
2003-12-19  Kazu Hirata  
3467
 
3468
        * dominance.c: Fix comment typos.
3469
        * et-forest.c: Likewise.
3470
        * et-forest.h: Likewise.
3471
        * tree-cfg.c: Likewise.
3472
        * tree-eh.c: Likewise.
3473
        * tree-mudflap.c: Likewise.
3474
        * tree-optimize.c: Likewise.
3475
        * tree-pretty-print.c: Likewise.
3476
        * tree-ssa-ccp.c: Likewise.
3477
        * tree-ssa-dom.c: Likewise.
3478
        * tree-ssa.c: Likewise.
3479
        * tree-tailcall.c: Likewise.
3480
        * tree.def: Likewise.
3481
        * tree.h: Likewise.
3482
 
3483
2003-12-18  Jason Merrill  
3484
 
3485
        PR c++/12453
3486
        * c-simplify.c (stmt_expr_last_stmt): Split out from...
3487
        (gimplify_stmt_expr): Here.
3488
        * c-common.h: Declare it.
3489
 
3490
2003-12-18  Zdenek Dvorak  
3491
 
3492
        * et-forest.h (et_forest_create, et_forest_delete,
3493
        et_forest_add_node, et_forest_add_edge, et_forest_remove_node,
3494
        et_forest_remove_edge, et_forest_parent,
3495
        et_forest_common_ancestor, et_forest_node_value,
3496
        et_forest_enumerate_sons): Declarations removed.
3497
        (struct et_node): New.
3498
        (et_new_tree, et_free_tree, et_set_father, et_split, et_nca,
3499
        et_below): Declare.
3500
        * et-forest.c (struct et_forest_occurrence, struct et_forest,
3501
        struct et_forest_node): Removed.
3502
        (et_forest_create, et_forest_delete,
3503
        et_forest_add_node, et_forest_add_edge, et_forest_remove_node,
3504
        et_forest_remove_edge, et_forest_parent,
3505
        et_forest_common_ancestor, et_forest_node_value,
3506
        et_forest_enumerate_sons, splay, remove_all_occurrences,
3507
        find_leftmost_node, find_rightmost_node, calculate_value): Removed.
3508
        (struct et_occ): New.
3509
        (et_nodes, et_occurences): New.
3510
        (set_depth, set_depth_add, set_prev, set_next, et_recomp_min,
3511
        et_check_occ_sanity, et_check_sanity, et_check_tree_sanity,
3512
        record_path_before_1, record_path_before, check_path_after_1,
3513
        check_path_after, et_splay, et_new_occ, et_new_tree,
3514
        et_free_tree, et_set_father, et_split, et_nca, et_below): New.
3515
        * basic-block.h (struct basic_block_def): New field dom.
3516
        (struct dominance_info): Type removed.
3517
        (calculate_dominance_info, free_dominance_info,
3518
        nearest_common_dominator, set_immediate_dominator,
3519
        get_immediate_dominator, dominated_by_p, get_dominated_by,
3520
        add_to_dominance_info, delete_from_dominance_info,
3521
        recount_dominator, redirect_immediate_dominators,
3522
        iterate_fix_dominators, verify_dominators): Declarations
3523
        changed.
3524
        (enum dom_state): New.
3525
        (dom_computed): New variable.
3526
        (first_dom_son, next_dom_son): Declare.
3527
        * dominance.c (struct dominance_info): Removed.
3528
        (BB_NODE, SET_BB_NODE): Removed.
3529
        (calculate_dominance_info, free_dominance_info,
3530
        nearest_common_dominator, set_immediate_dominator,
3531
        get_immediate_dominator, dominated_by_p, get_dominated_by,
3532
        add_to_dominance_info, delete_from_dominance_info,
3533
        recount_dominator, redirect_immediate_dominators,
3534
        iterate_fix_dominators, verify_dominators,
3535
        debug_dominance_info): Work over new datastructure.  Access
3536
        dominance datastructures through CFG.
3537
        (assign_dfs_numbers, compute_dom_fast_query, first_dom_son,
3538
        next_dom_son): New.
3539
        * tree-cfg.c (pdom_info): Variable removed.
3540
        (create_bb): Add the block to the dominance information.
3541
        (cleanup_tree_cfg): Let updating of the dominance on the
3542
        individual passes.
3543
        (remove_bb): Don't handle pdom.
3544
        (cleanup_control_expr_graph, tree_make_forwarder_block,
3545
        thread_jumps): Invalidate the dominators.
3546
        (tree_split_edge): Update the dominators.
3547
        (compute_dominance_frontiers_1, compute_dominance_frontiers,
3548
        tree_verify_flow_info, tree_loop_optimizer_init): Use the new
3549
        interface to dominators.
3550
        * domwalk.c (walk_dominator_tree): Do not use dom_children.
3551
        * tree-flow-inline.h (add_dom_child, remove_dom_child,
3552
        clear_dom_children, dom_children): Removed.
3553
        * tree-flow.h (struct bb_ann_d): Dom_children field removed.
3554
        (add_dom_child, dom_children, build_dominator_tree): Declaration
3555
        removed.
3556
        (compute_dominance_frontiers): Declaration changed.
3557
        * tree-optimize.c (optimize_function_tree): Free dominance
3558
        information in the end.
3559
        * tree-ssa-dom.c (tree_ssa_dominator_optimize,
3560
        dom_opt_finalize_block): Do not use dom_children.
3561
        * tree-ssa-pre.c (fast_a_dominates_b, build_dfs_id_array_1,
3562
        build_dfs_id_array): Removed.
3563
        (pre_idom, dfs_id, dfs_id_last): Variables removed.
3564
        (build_dfn_array): Do not use dom_children.
3565
        (eref_compare, load_modified_phi_result, rename_1, reaching_def,
3566
        finalize_1, collect_expressions, tree_perform_ssapre): Use the
3567
        new interface to the dominance information.
3568
        * tree-ssa.c (struct mark_def_sites_global_data): Idom field
3569
        removed.
3570
        (set_livein_block, verify_use, verify_phi_args,
3571
        rewrite_into_ssa, mark_def_sites, verify_ssa): Use the new
3572
        interface to the dominance information.
3573
        (build_dominator_tree): Removed.
3574
        * tree-tailcall.c (tree_optimize_tail_calls): Invalidate
3575
        dominance information.
3576
        * bt-load.c (dom): Variable removed.
3577
        (augment_live_range, combine_btr_defs, migrate_btr_def,
3578
        migrate_btr_defs, branch_target_load_optimize): Updated for the
3579
        new interface for dominance information.
3580
        * cfglayout.c (copy_bbs): Removed loops argument. Updated for
3581
        the new interface for dominance information.
3582
        * cfglayout.h (copy_bbs): Declaration changed.
3583
        * cfgloop.c (flow_loop_pre_header_find, flow_loops_cfg_dump,
3584
        flow_loop_scan, canonicalize_loop_headers, flow_loops_find): Updated
3585
        for the new interface for dominance information.
3586
        (flow_loop_scan): Loops argument removed.
3587
        (flow_loops_free): Don't release dominators.
3588
        * cfgloop.h (struct cfg): Dom field removed.
3589
        (flow_loop_scan, loop_split_edge_with, simple_loop_p,
3590
        just_once_each_iteration_p, split_loop_bb): Declaration changed.
3591
        * cfgloopanal.c (simple_loop_exit_p, simple_increment,
3592
        just_once_each_iteration_p, simple_loop_p): Remove loops argument.
3593
        Updated for the new interface for dominance information.
3594
        * cfgloopmanip.c (remove_bbs, find_path, create_preheader,
3595
        split_loop_bb, loopify, duplicate_loop_to_header_edge,
3596
        force_single_succ_latches, loop_split_edge_with): Ditto.
3597
        (create_loop_notes): Free the dominators.
3598
        * gcse.c (dominators): Variable removed.
3599
        (free_code_hoist_mem, compute_code_hoist_data, hoist_code):
3600
        Updated for the new interface for dominance information.
3601
        * ifcvt.c (post_dominators): Variable removed.
3602
        (mark_loop_exit_edges, merge_if_block, find_if_header,
3603
        find_cond_trap, find_if_case_1, find_if_case_2, if_convert):
3604
        Updated for the new interface for dominance information.
3605
        * loop-init.c (rtl_loop_optimizer_init,
3606
        rtl_loop_optimizer_finalize): Ditto.
3607
        * loop-unroll.c (decide_peel_simple, decide_peel_once_rolling,
3608
        decide_peel_completely, decide_unroll_stupid,
3609
        decide_unroll_constant_iterations,
3610
        decide_unroll_runtime_iterations): Loops argument removed.
3611
        Updated for the new interface for dominance information.
3612
        (unroll_and_peel_loops, peel_loops_completely,
3613
        unroll_loop_runtime_iterations): Updated for the new interface for
3614
        dominance information.
3615
        * loop-unswitch.c (may_unswitch_on_p, unswitch_loops,
3616
        unswitch_single_loop, unswitch_loop): Updated for the new
3617
        interface for dominance information.
3618
        * predict.c (process_note_predictions, process_note_prediction,
3619
        estimate_probability, note_prediction_to_br_prob): Ditto.
3620
        * sched-rgn.c (find_rgns, init_regions): Ditto.
3621
        * toplev.c (rest_of_handle_branch_prob): Free the dominators.
3622
 
3623
2003-12-18  Jeff Law  
3624
 
3625
        * tree-ssa-dom.c (edges_to_redirect, redirection_targets): Merged
3626
        into a single varray "redirection_edges".
3627
        (tree_ssa_dominator_optimize): Twiddle initialization, finalization
3628
        and accessors to redirection information based on combining varrays.
3629
        Get the threading destination from the saved edge rather than from a
3630
        saved block.  Mark variables appearing in PHIs at the jump thread
3631
        destination to be taken out of SSA form.
3632
        (thread_across_edge): Save the edge into the destination block
3633
        rather than the destination block itself.  Twiddle based on
3634
        combining varrays of jump threading information.
3635
        * tree-flow.h (tree_block_forwards_to): Returns an edge rather than
3636
        a block.
3637
        * tree-cfg.c (tree_block_forwards_to): Return the edge leading to
3638
        the target block rather than the target block itself.
3639
 
3640
2003-12-18  Daniel Berlin  
3641
 
3642
        * tree-dfa.c (get_memory_tag_for): Don't put things with different
3643
        points-to sets in the same memory tag.
3644
 
3645
2003-12-18  Jan Hubicka  
3646
 
3647
        * c-common.c (handle_nonnull_attribute, check_function_nonnull):
3648
        Initialize arg_num.
3649
        * c-format.c (handle_format_attribute): Initialize format_num.
3650
        * rtlanal.c (get_related_value): Initialize get_jump_table_offset
3651
 
3652
2003-12-18  Zdenek Dvorak  
3653
 
3654
        * stmt.c (expand_start_loop, expand_loop_continue_here,
3655
        expand_end_loop): Don't create loop notes.
3656
 
3657
2003-12-18  Zdenek Dvorak  
3658
            Jeff Law  
3659
 
3660
        * tree-cfg.c (tree_node_shared_p): Explicitly allow sharing of
3661
        CST nodes.
3662
        * tree-simple.c (is_gimple_rhs): Allow CST nodes.
3663
        (is_gimple_min_invariant): Reject constants with TREE_OVERFLOW set.
3664
        * tree-ssa-ccp (visit_assignment): Test is_gimple_min_invariant
3665
        after munging bitfields.
3666
        * tree-ssa-dom.c (record_equivalences_from_stmt): Similarly.
3667
 
3668
2003-12-17  Jan Hubicka  
3669
 
3670
        Based on patch by Dale Johannesen
3671
        * expr.c (MOVE_RATIO, CLEAR_RATIO): Move to ...
3672
        * expr.h (MOVE_RATIO, CLEAR_RATIO): ... here
3673
 
3674
2003-12-17  Jan Hubicka  
3675
 
3676
        * Makefile.in (sibcall.o): Kill.
3677
        (tree-tailcall.o): Add except.h dependency
3678
        * sibcall.c: Kill.
3679
        (purge_reg_equiv_notes, purge_mem_unchanging_flag): Move to ...
3680
        * calls.c (purge_reg_equiv_notes, purge_mem_unchanging_flag) ... here.
3681
        (expand_call): Do not produce placeholders; do not deal with tail
3682
        recursion; set tail_call_emit.
3683
        (fixup_tail_calls): New.
3684
        * expr.h (fixup_tail_calls): Declare.
3685
        * toplev.c (rest_of_handle_sibling_calls): Kill.
3686
        (rest_of_compialtion): Do not use rest_of_handle_sibling_calls;
3687
        call fixup_tail_calls.
3688
        * tree-dump.c (dump_files): Add tail2
3689
        * tree-flow.h (tree_optimize_tail_calls): Update prototype.
3690
        * tree-optimize.c (optimize_function_tree): Do tail optimization twice.
3691
        * tree-tailcall.c: Inlucde except.h
3692
        (suitable_for_tail_call_opt_p): New.
3693
        (optimize_tail_call): Add opt_tailcalls argument; optimize tailcalls.
3694
        (tree_optimize_tail_calls): Add opt_tailcalls/pass arguments.
3695
        * tree.h (CALL_EXPR_TAILCALL): New.
3696
        (tree_dump_index): Add tail2
3697
        * function.h (struct function): Add tail_call_emit field.
3698
 
3699
2003-12-17  Jan Hubicka  
3700
 
3701
        * tree-inline.c (estimate_num_insns_1):  Check that all nodes are
3702
        known; add missing nodes; fix MODIFY_EXPR
3703
 
3704
2003-12-16  Jason Merrill  
3705
 
3706
        PR middle-end/12920
3707
        * stor-layout.c (layout_type): Just return if type is
3708
        error_mark_node.
3709
        * c-decl.c (grokdeclarator): Immediately layout an
3710
        ARRAY_TYPE used in a pointer-to-array declarator.
3711
 
3712
2003-12-16  Diego Novillo  
3713
 
3714
        * tree-dfa.c (may_alias_p): If VAR and PTR are pointers with the
3715
        same alias set, return false.
3716
        (get_memory_tag_for): Group based on alias set classes, not on
3717
        conflicting alias sets.
3718
        * tree-must-alias.c (promote_var): Don't bring aliases over when
3719
        all the may-aliases of a non-promotable variable are promoted.
3720
 
3721
2003-12-16  Andrew MacLeod  
3722
 
3723
        * tree-flow-inline.h (free_vuse, free_vdefs): Moved to
3724
        tree-ssa-operands.c
3725
        (get_def_ops, get_use_ops, get_vdef_ops, get_vuse_ops): Use the new
3726
        more direct structure pointer.
3727
        (get_use_op_ptr, get_def_op_ptr): Cast is no longer necessary.
3728
        * tree-flow.h (struct stmt_ann_d): Replace operands and voperands
3729
        pointers with pointers directly to the operand types.
3730
        * tree-ssa-dom.c (cprop_into_stmt): Use new stmt based interface to
3731
        free virtual operands.  Check virtual bases of both VUSE and VDEF.
3732
        * tree-ssa-operands.c (struct voperands_d): Declare here, used only
3733
        for previous_vops during stmt operand construction.
3734
        (struct vecmanage_d, vecmanage_add_segmen, vecmanage_add_special,
3735
        vecmanage_init, vecmanage_tree_ptr_init, vecmanage_fini, check_free,
3736
        vecmanage_new_vector, vecmanage_new_tree_ptr_vector,
3737
        vecmanage_free_vector): Remove.
3738
        (allocate_ssa_op_vec, free_ssa_op_vec, allocate_ssa_virtual_op_vec,
3739
        allocate_operands_t, allocate_voperands_t): Remove.
3740
        (finalize_new_ssa_operands, inalize_new_ssa_virtual_operand): Remove.
3741
        (struct freelist_d): New. List of free operand structures.
3742
        (check_optype_freelist): New. Choose memory from freelist, if available.
3743
        (add_optype_freelist): New. Add structure to freelist, if appropriate.
3744
        (allocate_def_optype): New. Allocate a def operand list from GC.
3745
        (allocate_use_optype): New. Allocate a useoperand list from GC.
3746
        (allocate_vdef_optype): New. Allocate a vdef operand list from GC.
3747
        (allocate_vuse_optype): New. Allocate a vuse operand list from GC.
3748
        (free_uses, free_defs, free_vuses, free_vdefs): Use GC and the freelist.
3749
        (remove_vuses, remove_vdefs): New.  External interface to remove virtual
3750
        operands.
3751
        (init_ssa_operands, fini_ssa_operands): Ensure the free list is empty.
3752
        (finalize_ssa_defs, finalize_ssa_use, finalize_ssa_vdefs,
3753
        finalize_ssa_vuses): Use new direct pointers from the stmt annotation.
3754
        (append_vdef, append_vuse): No need to hack prev_vops pointer now.
3755
        (get_stmt_operands): use new freeing interface, keep previous vops in
3756
        their own local structure for now, passing its address around.
3757
        * tree-ssa-operands.h (struct def_optype_d, struct use_optype_d,
3758
        struct vdef_optype_d, struct vuse_optype_d): Implement as a single
3759
        dynamically allocated structure.
3760
        (struct operands_d, struct operands_d): Remove.
3761
        * tree-ssa-pre.c (subst_phis): Remove virtual operands using new funcs.
3762
 
3763
2003-12-16  Jan Hubicka  
3764
 
3765
        * tree-cfg.c (verify_addr_expr): Rename to ....
3766
        (verify_expr):  ... this one; check that no SSA names are on
3767
        freelist.
3768
        (verify_stmt, verify_stmts): Update calls of verify_addr_expr.
3769
 
3770
        Revert until initializers are made language independent:
3771
        * cgraphunit.c (record_call_1): Do not call analyze_expr hook
3772
        * langhooks-def.h (LANG_HOOKS_CALLGRAPH_ANALYZE_EXPR): Kill.
3773
        (LANG_HOOKS_CALLGRAPH_INITIALIZER): Update.
3774
        * longhooks.h (lang_hooks_for_callgraph): Kill analyze_expr.
3775
 
3776
2003-12-16  Zdenek Dvorak  
3777
 
3778
        * tree-pretty-print.c (dump_bb_header): Show block number when
3779
        there is no label.
3780
        (pp_cfg_jump): Show labels in addition to block numbers.
3781
        (dump_generic_bb_buff): Always call dump_bb_header.
3782
 
3783
2003-12-16  Jan Hubicka  
3784
 
3785
        * cgraphunit.c (cgraph_remove_unreachable_nodes): Fix typo;
3786
        improve comments; cleanup linked list mantenance.
3787
 
3788
2003-12-15  Diego Novillo  
3789
 
3790
        * tree-sra.c (can_be_scalarized_p): Reject volatile variables.
3791
 
3792
        * sibcall.c (skip_copy_to_return_value): Initialize 'hardret' and
3793
        'softret'.
3794
 
3795
2003-12-16  Jan Hubicka  
3796
 
3797
        * cgraph.c (cgraph_remove_node): Ignore DECL_EXTERNAL clones.
3798
        * cgraphunit.c (verify_cgraph_node): Do not insist on unemmited extern
3799
        inline functions to be valid.
3800
        (cgraph_finalize_compilation_unit):  Fix ordering.
3801
        (cgraph_mark_functions_to_output): Do not insist on DECL_EXTERNAL
3802
        nodes to be reclaimed.
3803
        (cgraph_remove_unreachable_nodes): New function.
3804
        (cgraph_decide_inlining): use it.
3805
 
3806
2003-12-15  Andrew MacLeod  
3807
 
3808
        * Makefile.in (TREE_FLOW_H): Add dependence on tree-ssa-operands.h
3809
        (OBJS-common): Add tree-ssa-operands.o
3810
        (tree-ssa-operands.o): Add dependencies.
3811
        (GTFILES): Add tree-ssa-operands.[ch].
3812
        * tree-dfa.c (get_stmt_operands, get_expr_operands, add_stmt_operand,
3813
        note_addressable, add_def, add_use, add_vde, add_vuse,
3814
        add_call_clobber_ops, add_call_read_ops): Moved to tree-ssa-operands.c.
3815
        (compute_immediate_uses_for_stmt): Use new optypes interface.
3816
        (cleanup_operand_arrays): Delete.
3817
        (collect_dfa_stats_r): Use new optypes interface.
3818
        (get_call_flags): Moved to tree-ssa-operands.c.
3819
        (vdefs_disappeared_p, mark_new_vars_to_rename): Use optypes interface.
3820
        * tree-flow-inline.h (def_ops, use_ops, vdef_ops, vuse_ops): Use new
3821
        optypes.
3822
        (free_vuses): New. Clear and release vuses.
3823
        (free_vdefs): New. Clear and release vdefs.
3824
        (get_use_ops_ptr): New. Get address of a use op.
3825
        (get_def_ops_ptr): New. Get address of a use op.
3826
        (get_vdef_result_ptr): New. Get address of a use op.
3827
        (get_vdef_op_ptr): New. Get address of a use op.
3828
        (get_vuse_op_ptr): New. Get address of a use op.
3829
        (start_ssa_stmt_operands): New. Entry point to start processing stmt
3830
        operands.
3831
        * tree-flow.h (struct operands_d, struct voperands_d): Move to
3832
        tree-ssa-operands.h
3833
        (struct stmt_ann_d): Add GTY markers to operands.
3834
        * tree-pretty-print.c (dump_vops): Use optypes interface.
3835
        * tree-sra.c (create_scalar_copies): Use optypes interface.
3836
        (scalarize_structures, scalarize_modify_exp): Use optypes interface.
3837
        * tree-ssa-ccp.c (visit_stmt, ccp_fold, initialize, replace_uses_in,
3838
        likely_value, set_rhs): Use optypes interface.
3839
        * tree-ssa-dce.c (find_useful_stmts, stmt_useful_p, process_worklist):
3840
        Use optypes interface.
3841
        * tree-ssa-dom.c (thread_across_edge, thread_jumps_walk_stmts): Use
3842
        optypes interface.
3843
        (cprop_into_stmt): Rewrite using new interface.
3844
        (eliminate_redundant_computations, record_equivalences_from_stmt,
3845
        optimize_stmt, avail_expr_hash, avail_expr_eq): Use optypes interface.
3846
        * tree-ssa-live.c (create_ssa_var_map, calculate_live_on_entry,
3847
        build_tree_conflict_graph,register_ssa_partitions_for_vars): Use
3848
        optypes interface.
3849
        * tree-ssa-pre.c (names_match_p, maybe_find_rhs_use_for_var,
3850
        expr_phi_insertion, same_e_version_real_occ_real_occ, opnum_of_phi,
3851
        generate_expr_as_of_bb, generate_vops_as_of_bb, subst_phis,
3852
        load_modified_real_occ_real_occ, same_e_version_phi_result, can_insert,
3853
        get_default_def, reaching_def, process_left_occs_and_kills,
3854
        collect_expressions): Use optypes interface.
3855
        * tree-ssa.c (mark_def_sites, check_replaceable, find_replaceable_in_bb,
3856
        dump_replaceable_exprs, rewrite_trees, verify_ssa, rewrite_stmt): Use
3857
        optypes interface.
3858
        (init_tree_ssa): Initialize new operand data structures.
3859
        (delete_tree_ssa): Free new operand structures.
3860
        * tree.h (VDEF_RESULT, VDEF_OP, NUM_VDEFS): Move to tree-ssa-operands.h.
3861
 
3862
        * tree-ssa-operands.h: New file.
3863
        (struct def_optype_d): New. Structure for stmt defs.
3864
        (struct use_optype_d): New. Structure for stmt uses.
3865
        (struct vdef_optype_d): New. Structure for stmt vdefs.
3866
        (struct vuse_optype_d): New. Structure for stmt vuses.
3867
        (USE_OPS, STMT_USE_OPS, NUM_USES, USE_OP_PTR, USE_OP): Macros to
3868
        access stmt uses.
3869
        (DEF_OPS, STMT_DEF_OPS, NUM_DEFS, DEF_OP_PTR, DEF_OP): Macros to
3870
        access stmt defs.
3871
        (VDEF_OPS, STMT_VDEF_OPS, NUM_VDEFS, VDEF_RESULT_PTR, VDEF_RESULT,
3872
        VDEF_OP_PTR, VDEF_OP): Macros to access stmt vdefs.
3873
        (VUSE_OPS, STMT_VUSE_OPS, NUM_VUSES, VUSE_OP_PTR, VUSE_OP): Macros to
3874
        access stmt vuses.
3875
        (struct operands_d, struct voperands_d): moved from tree-dfa.c.
3876
        * tree-ssa-operands.c: New file.
3877
        (build_defs, build_uses, build_vdefs, build_vuses): New static varrays.
3878
        (struct vecmanage_d): New. Struct to manage non-GC vectors.
3879
        (vecmanage_add_segment): New. Add a new segment to a vector manager.
3880
        (vecmanage_add_special): New. Add a large vector to the special list.
3881
        (vecmanage_init): Initialize a vector manager.
3882
        (vecmanage_tree_ptr_init): New. Initialize a vector manager for tree *.
3883
        (vecmanage_fini): New. Release vector manager memory.
3884
        (check_free): New. Look for free memory in the vector maanger.
3885
        (vecmanage_new_vector): New. Allocate a vector.
3886
        (vecmanage_new_tree_ptr_vector): New. Allocate a vector of 'tree *'.
3887
        (vecmanage_free_vector): New. Free a vector.
3888
        (free_ssa_op_vec): New. Free an ssa operand's memory.
3889
        (allocate_ssa_op_vec): New. Allocate a vector for use/defs.
3890
        (allocate_ssa_virtual_op_vec): New. Allocate a vector for vuse/vdefs.
3891
        (allocate_operands_t): New. Allocate an operand structure.
3892
        (allocate_voperands_t): New. Allocate a virtual operand structure.
3893
        (free_uses): New. Clear and release uses.
3894
        (free_defs): New. Clear and release defs.
3895
        (init_ssa_operands): New. Initialize ssa operand management.
3896
        (fini_ssa_operands): New. Cleanup ssa operand management.
3897
        (finalize_new_ssa_operands): New. Commit current operands.
3898
        (finalize_new_ssa_virtual_operands): New. Commit current virtual ops.
3899
        (finalize_ssa_defs): New. Commit and verify stmt definitions.
3900
        (finalize_ssa_uses): New. Commit and verify stmt uses.
3901
        (finalize_ssa_vdefs): New. Commit and verify stmt virtual definitions.
3902
        (finalize_ssa_vuses): New. Commit and verify stmt virtual uses.
3903
        (finalize_ssa_stmt_operands): New. Commit all stmt operands.
3904
        (verify_start_operands): New. Verify build mechanism is ready for a new
3905
        stmt.
3906
        (append_def): Renamed from add_def, and moved from tree-dfa.c.
3907
        (append_use): Renamed from add_def, and moved from tree-dfa.c.
3908
        (append_vdef): Renamed from add_def, and moved from tree-dfa.c.
3909
        (append_vuse): Renamed from add_def, and moved from tree-dfa.c.
3910
        (add_vuse): New. Entry point to add a vuse to a stmt.
3911
        (get_call_flags): Moved from tree-dfa.c
3912
        (get_stmt_operands, get_expr_operands, add_stmt_operand): Moved from
3913
        tree-dfa.c, and use new optype interface.
3914
        (note_addressabe, add_call_clobber_ops, add_call_read_ops): Moved from
3915
        tree-dfa.c
3916
 
3917
2003-12-15  Diego Novillo  
3918
 
3919
        * tree-optimize.c (optimize_function_tree): Call BITMAP_XFREE.
3920
 
3921
2003-12-15  Diego Novillo  
3922
 
3923
        PR optimization/12747
3924
 
3925
        * tree-cfg.c (verify_addr_expr): Simplify predicates.
3926
        * tree-must-alias.c (addresses_needed): Declare as file local.
3927
        (can_be_promoted): New.
3928
        (tree_compute_must_alias): Call it.
3929
        Remove promoted variables from call_clobbered_vars.
3930
        (find_addressable_vars): Update comment.
3931
        Remove argument.  Update callers.
3932
        (promote_var): Always clear TREE_ADDRESSABLE.
3933
        Don't remove promoted variables from call_clobbered_vars.
3934
        If the promoted variable is in the may-alias set of a
3935
        non-promotable variable, copy its alias set into the alias set of
3936
        the non-promotable variable.
3937
        (find_variable_in): Update comment.
3938
        * tree-sra.c (can_be_scalarized_p): Reject structures with
3939
        __complex__ fields in them.
3940
 
3941
2003-12-15  Diego Novillo  
3942
            Jason Merrill 
3943
 
3944
        PR optimization/12747
3945
 
3946
        * Makefile.in (tree-simple.o): Add dependency on bitmap.h and
3947
        $(GGC_H).
3948
        (GTFILES): Add tree-simple.c.
3949
        * tree-simple.c: Include ggc.h and bitmap.h.
3950
        (is_gimple_non_addressable_1): Remove.  Update all callers.
3951
        (types_checked): New local variable.
3952
        (types_in_memory): New local variable.
3953
        (struct_needs_to_live_in_memory): New.
3954
        (needs_to_live_in_memory): New.
3955
        (is_gimple_reg): Call it.
3956
        (is_gimple_non_addressable): Call it.
3957
        (is_gimple_call_clobbered): Call it.
3958
        * tree-simple.h (needs_to_live_in_memory): Declare.
3959
 
3960
2003-12-14  Andreas Jaeger  
3961
 
3962
        * config/rs6000/rs6000.c (rs6000_output_function_epilogue): Handle
3963
        GNU F95.
3964
 
3965
2003-12-14  Jan Hubicka  
3966
 
3967
        * cgraphunit.c (cgraph_expand_function):  Release function body when no
3968
        longer needed.
3969
        (lookup_recursive_calls): New function.
3970
        (cgraph_decide_recursive_inlining): Likewise.
3971
        (cgraph_decide_inlining_of_small_functions): Do recursive inlining.
3972
        * tree-inline.c: Include function.h
3973
        (copy_body): Choose saved body for recursive inlining.
3974
        (initialize_inlined_parameters): Likewise.
3975
        (expand_call_inline): Do not verify nodes when recursivly inlining,
3976
        insert ret_label into decl map.
3977
        * params.def (PARAM_MAX_INLINE_INSNS_RECURSIVE,
3978
        PARAM_MAX_INLINE_INSNS_RECURSIVE_AUTO,
3979
        PARAM_MAX_INLINE_RECURSIVE_DEPTH,
3980
        PARAM_MAX_INLINE_RECURSIVE_DEPTH_AUTO): New argument.
3981
        * invoke.texi (max-inline-insns-recursive, max-inline-recursive-depth):
3982
        Document.
3983
        * Makefile.in (tree-inline.o): Include function.h.
3984
 
3985
2003-12-14  Jan Hubicka  
3986
 
3987
        * cgraphunit.c (record_call_1): Do not call analyze_expr hook
3988
        * langhooks-def.h (LANG_HOOKS_CALLGRAPH_ANALYZE_EXPR): Kill.
3989
        (LANG_HOOKS_CALLGRAPH_INITIALIZER): Update.
3990
        * longhooks.h (lang_hooks_for_callgraph): Kill analyze_expr.
3991
 
3992
2003-12-13  Jan Hubicka  
3993
 
3994
        * timevar.def (TV_TREE_STMT_VERIFY, TV_CFG_VERIFY, TV_CGRAPH_VERIFY):
3995
        New timers.
3996
        * tree-cfg.c (verify_stmts):  Push/pop timevar.
3997
        * cfg.c: Include timevar.h
3998
        (verify_flow_info): Push/pop timevar.
3999
        * Makefile.in (cfg.o): Add dependnecy on TIMEVARS
4000
 
4001
        * cgraph.c (cgraph_create_edge): Sanity check for duplicates;
4002
        initialize aux.
4003
        (cgraph_remove_node): Decrease cgraph_n_nodes; do not clear
4004
        DECL_SAVED_TREE when dumping.
4005
        (cgraph_dump_node): Break out from ...; print more information.
4006
        (cgraph_dump): ... here.
4007
        * cgraph.h (cgraph_node): Add aux field.
4008
        (dump_cgraph_node, verify_cgraph, verify_cgraph_node): Declare.
4009
        (cgraph_mark_inline_edge): Declare
4010
        * cgraphunit.c (error_found): New static variable.
4011
        (verify_cgraph_node_1): New static function.
4012
        (verify_cgraph_node, verify_cgraph): New global function.
4013
        (cgraph_expand_function): More sanity checks.
4014
        (cgraph_clone_inline_nodes): Destructivly clone DECL_EXTERNAL nodes.
4015
        (cgraph_mark_inline_edge): Make global.
4016
        (cgraph_decide_inlining): Remove extern inline functions never inlined.
4017
        (cgraph_decide_inlining_incrementally): Verify that function body is
4018
        still present.
4019
        (expand_all_functions): Verify that all nodes are reachable.
4020
        (cgraph_optimize): Verify cgraph and memory management.
4021
        * tree-inline.c (copy_body_r): All edges must be present.
4022
        (expand_call_inline): Sanity check newly created edges and nodes
4023
        being inlined.
4024
        (optimize_inline_calls): Sanity check that we've inlined everything.
4025
        * tree-optimize.c (tree_rest_of_compilation): Clone functions inlined
4026
        into cloned node.
4027
 
4028
2003-12-13  Jan Hubicka  
4029
 
4030
        * tree-flow.h (tree_ssa_useless_type_conversion_1): Declare.
4031
        * tree-flow.c (tree_ssa_useless_type_conversion_1): Break out from
4032
        from...; allow complex types whose subtypes match.
4033
        (tree_ssa_useless_type_conversion): ... here.
4034
 
4035
2003-12-12  Jeff Law  
4036
 
4037
        * tree-ssa-dom.c (optimize_stmt): Don't call cleanup_control_expr
4038
        here.  Instead just note that we need to cleanup the cfg (which
4039
        will DTRT).
4040
 
4041
        * timevar.def (TV_TREE_SSA_THREAD_JUMPS): Kill.
4042
        * tree-dump.c (dump_files): Kill .thread dump.
4043
        * tree.h (TDI_thread_jumps): Kill.
4044
        * tree-flow.h (tree_ssa_dominator_thread_jumps): Kill prototype.
4045
        * tree-optimize.c (optimize_function_tree): Kill call to
4046
        tree_ssa_dominator_thread_jumps.
4047
        * tree-ssa-dom.c (thread_through_phis): Kill.  We no longer need
4048
        to restrict threading through PHIs.
4049
        (tree_ssa_dominator_thread_jumps): Kill.
4050
        (tree_ssa_domiantor_optimize_1): Fold back into
4051
        tree_ssa_dominator_optimize.
4052
        (tree_ssa_dominator_optimize): Mark back edges in the flow graph.
4053
        Kill code which conditionalized the walk_tree callbacks based
4054
        on thread_through_phis.  When threading jumps, reorganize code
4055
        so that we can take the affected variables out of SSA form.
4056
        Mark new variables created by out-of-ssa code as needing to be
4057
        rewritten.
4058
        (thread_across_edge): Always allow threading through phis.
4059
        (thread_jumps_walk_stmts): Kill.
4060
 
4061
        * tree-ssa.c (create_temp): When we create a new temporary, make
4062
        sure to put it into referenced_vars, give it an ID number and
4063
        a suitable mem_tag.
4064
        (eliminate_build): If we encounter a PHI argument which is an
4065
        SSA_VAR we are not rewriting out of SSA form, then just treat
4066
        it like a constant.
4067
        (rewrite_vars_out_of_ssa): New function.
4068
        * tree-flow.h (rewrite_vars_out_of_ssa): Prototype.
4069
        * tree-ssa-live.c (register_ssa_partitions_for_vars): New function.
4070
        * tree-ssa-live.h (register_ssa_partitions_for_vars): Prototype.
4071
 
4072
2003-12-12  Jan Hubicka  
4073
 
4074
        * tree-inline.c (remap_decl): Avoid invalid sharing.
4075
        * cp-tree.h (optimize_function): Kill.
4076
        * optimize.c (optimize_function): Kill.
4077
        * semantics.c (expand_body): Do not call optimize_function.
4078
 
4079
2003-12-12  Jan Hubicka  
4080
 
4081
        * cgraphunit.c (cgraph_optimize):  Do not decide inlining when not
4082
        inlining
4083
 
4084
2003-12-11  Jan Hubicka  
4085
 
4086
        * tree-inline.c (initialize_inlined_parameters): Disable
4087
        constant propagation for non-gimple-min-invariant when
4088
        preserving gimple form.
4089
 
4090
2003-12-11  Jeff Law  
4091
 
4092
        * tree-ssa-ccp.c (widen_bitfield): Clear out unwanted high bits
4093
        even if the field's type is unsigned.
4094
        * tree-ssa-dom.c (record_equivalences_from_stmt): When creating
4095
        equivalences from stores, be more careful about non-constant
4096
        stores to bitfields.
4097
 
4098
2003-12-11  Diego Novillo  
4099
 
4100
        * opts.c (decode_options): Do not enable the tree loop optimizer by
4101
        default.
4102
        * tree-ssa-loop.c (tree_ssa_loop_opt): Remove ENABLE_CHECKING
4103
        guards.
4104
 
4105
2003-12-10  Richard Henderson  
4106
 
4107
        * builtins.c (expand_builtin_profile_func): New.
4108
        (expand_builtin): Use it.
4109
        * builtins.def (BUILT_IN_PROFILE_FUNC_ENTER): New.
4110
        (BUILT_IN_PROFILE_FUNC_EXIT): New.
4111
        * function.c (expand_function_start, expand_function_end): Don't
4112
        do function instrumentation here.
4113
        * gimplify.c (gimplify_function_tree): Do it here.
4114
 
4115
        * c-opts.c (c_common_post_options): Don't ever use rtl inlining.
4116
 
4117
2003-12-10  Diego Novillo  
4118
 
4119
        * ifcvt.c (dead_or_predicable): Initialize local variable
4120
        'earliest'.
4121
        * tree-cfg.c (verify_stmt): Fix typo.
4122
        * tree-ssa-dom.c (propagate_value): New local function.
4123
        (cprop_into_stmt): Call it.
4124
        (cprop_into_phis): Call it.
4125
        (eliminate_redundant_computations): Call it.
4126
 
4127
2003-12-10  Dale Johannesen  
4128
 
4129
        * tree-dfa.c (compute_alias_sets):  Don't try to make
4130
        GLOBAL_VAR alias itself.
4131
 
4132
2003-12-08  Steven Bosscher  
4133
 
4134
        * tree-must-alias.c (tree_compute_must_alias): Use
4135
        num_call_clobbered_vars and call_clobbered_var() instead of
4136
        poking in the call_clobbered_vars varray directly.
4137
 
4138
2003-12-11  Jan Hubicka  
4139
 
4140
        * cgraph.c (cgraph_function_possibly_inlined_p): Fix syntax error on
4141
        gcc-2.95.
4142
 
4143
2003-12-10  Diego Novillo  
4144
 
4145
        Revert
4146
 
4147
        2003-12-07  Richard Henderson  
4148
 
4149
                * c-common.c (c_address_looks_like_offsetof): New.
4150
                * c-common.h (c_address_looks_like_offsetof): Declare.
4151
                * c-typeck.c (build_unary_op) : Use it.  Don't lower
4152
                address references not destined for offsetof.
4153
                (c_expand_return): Only look inside ARRAY_REF and COMPONENT_REF
4154
                when looking for returning address of local variable.
4155
                * expr.c (expand_expr_1): Don't dereference size
4156
                of unbounded arrays.
4157
                * gimplify.c (gimplify_addr_expr): Only fold
4158
                address of variable size array elements.
4159
                * tree-simple.c (is_gimple_min_invariant): Also check
4160
                is_gimple_variable before disallowing offset address for type.
4161
                * tree-ssa-ccp.c (maybe_fold_offset_to_aggregate_ref): New.
4162
                (maybe_fold_offset_to_component_ref): Use it.
4163
                (maybe_fold_stmt_indirect, maybe_fold_stmt_plus): Likewise.
4164
                (maybe_fold_offset_to_array_ref): Likewise.
4165
                Don't fail for division remainder non-zero.
4166
                * varasm.c (initializer_constant_valid_p) : Use
4167
                handled_component_p and look inside references.
4168
                : Always look past widening casts.
4169
 
4170
2003-12-09  Jan Hubicka  
4171
 
4172
        * cgraph.c (cgraph_inline_hash): New global variable.
4173
        (cgraph_create_node): Break out of ....
4174
        (cgraph_node): ... this one.
4175
        (cgraph_redirect_edge_callee):  New function.
4176
        (cgraph_remove_node): Aggressively elliminate dead nodes;
4177
        remove node out of clone list.
4178
        (dump_cgraph): Dump inlined_to field; dump uid numbers.
4179
        (cgraph_clone_edge): Return edge created.
4180
        (cgraph_clone_node): New.
4181
        (cgraph_function_possibly_inlined_p): Re-implement using hashtable.
4182
        * cgraph.h: Include hashtab.h
4183
        (struct cgraph_global_info): Kill inline_once, will be output and
4184
        cloned_times fields.  Add inlined_to field.
4185
        (cgraph_node): Add next_clone.
4186
        (cgraph_inline_hash): Declare.
4187
        (cgraph_clone_edge): Update prototype.
4188
        (cgraph_clone_node, cgraph_redirect_callee): Declare.
4189
        * cgraphunit.c (cgraph_optimize_function): Kill.
4190
        (cgraph_assemble_function): Kill next_needed to avoid GGC corruption.
4191
        (cgraph_analyze_function): Do not intialize cloned_times and
4192
        will_be_output.
4193
        (cgraph_finalize_compilation_unit):  Clear next_needed.
4194
        (cgraph_optimize_function): Kill.
4195
        (cgraph_expand_function): Do not use cgraph_optimize_function.
4196
        (cgraph_estimate_growth, cgraph_mark_inline,
4197
        cgraph_check_inline_limits, cgraph_recursive_inlining_p,
4198
        cgraph_preserve_function_body_p): Update for explicit clones.
4199
        (INLINED_TIMES, SET_INLINED_TIMES, cgraph_inlined_into,
4200
        cgraph_inlined_callees, struct cgraph_inline_context,
4201
        cgraph_create_inline_context, cgraph_free_inline_context,
4202
        cgraph_inline_context_set_caller, cgraph_inline_context_clear_caller,
4203
        cgraph_inline_context_set_callee, cgraph_inline_context_clear_callee,
4204
        update_callee_keys): Kill.
4205
        (cgraph_clone_inlined_nodes, cgraph_mark_inline_edge): New.
4206
        (cgraph_decide_inlining_of_small_functions, (cgraph_decide_inlining,
4207
        cgraph_decide_inlining_incrementally): Simplify.
4208
        * tree-inline.c (typedef struct_inline_data): New field saving_p.
4209
        (copy_body_r): Update all clones.
4210
        (expand_call_inline): Remove inlined cgraph node.
4211
        (save_body): Inicialize id.node and id.saving_p.
4212
        * tree-optimize.c (tree_rest_of_compilation): Maintain clone up-to-date
4213
        in no-unit-at-a-time mode.
4214
 
4215
2003-12-08  Steven Bosscher  
4216
 
4217
        * tree-optimize.c (optimize_function_tree): Move verify_ssa calls
4218
        into conditionals.
4219
 
4220
2003-12-08  Daniel Berlin  
4221
 
4222
        * tree-alias-ander.c (andersen_same_points_to_set): Fix memory leak.
4223
 
4224
2003-12-08  Jeff Law  
4225
 
4226
        * tree-ssa-live.c (register_ssa_partition): Kill legacy code which
4227
        recursively called register_ssa_partition on PHI arguments when
4228
        SSA_VAR was defined by a PHI_NODE.
4229
 
4230
2003-12-08  Jan Hubicka  
4231
 
4232
        * tree-dump.c (dump_files): Fix ordering of tail call pass.
4233
        * tree.h (tree_dump_index): Likewise.
4234
 
4235
2003-12-08  Zdenek Dvorak  
4236
 
4237
        * Makefile.in (tree-cfg.o): Add gt-tree-cfg.h dependency.
4238
        (GTFILES): Add tree-cfg.c.
4239
        * tree-cfg.c: Include gt-tree-cfg.h.
4240
        (factored_computed_goto_label, factored_computed_goto):
4241
        Mark gc roots.
4242
 
4243
2003-12-08  Steven Bosscher  
4244
            Jan Hubicka  
4245
 
4246
        * gengtype-lex.l (IWOrD): Add HOST_WIDEST_INT
4247
        * Makefile.in (function.o, reg-stack.o): Add missing dependency on
4248
        basic-block.h.
4249
        (GTFILES): Add basic-block.h and hwint.h.
4250
        * basic-block.h (struct edge_def): Add GTY markers, make garbage
4251
        collectable.  Make `insns' field GC safe depending on the setting
4252
        of cfg_hooks.
4253
        (struct basic_block_def): Add GTY markers, make garbage collectable.
4254
        (tree_bb_root, tree_phi_root): Kill extern decls.
4255
        (ENTRY_BLOCK_PTR, EXIT_BLOCK_PTR): Change from macro to variable
4256
        (entry_exit_blocks): Kill.
4257
        * cfg.c: Include ggc.h
4258
        (bb_pool, edge_pool, entry_exit_blocks): Kill.
4259
        (ENTRY_BLOCK_PTR, EXIT_BLOCK_PTR): Define.
4260
        (init_flow): Do not create ppols; allocate entry/exit block.
4261
        (free_edge, alloc_block, expunge_block, unchecked_make_edge): Use GGC.
4262
        (compact_blocks): Don't update tree_bb_root and tree_phi_root.
4263
        * cfgrtl.c (rtl_merge_blocks): Clear head pointer.
4264
        * regs.h: Protect against multiple inclusion.
4265
        * tree-cfg.c (obstack_tree_ann_obstack, first_block_tree_and_obj,
4266
        tree_bb_root): Kill.
4267
        (build_tree_cfg, create_bb, remove_bb, delete_tree_cfg): Don't
4268
        touch tree_bb_root and tree_phi_root.
4269
        (create_block_annotations): Do not initialize obstack.
4270
        (free_block_annotations): Do not free obstack.
4271
        (create_block_annotation): Use GGC.
4272
        * tree-dfa.c (tree_phi_root): Kill.
4273
        * tree-flow.h (bb_ann, bb_ann_d): Declare.  Add `phi_nodes' field.
4274
        * tree-phinodes.c (create_phi_node, add_phi_arg, remove_phi_node,
4275
        remove_all_phi_nodes_for): Use `phi_nodes' field in the bb
4276
        annotation instead of tree_phi_root.
4277
        * tree-flow-inline.h (phi_nodes, set_phi_nodes): Likewise.
4278
        (add_dom_child, clear_dom_children): Use GGC.
4279
        * tree-ssa-pre.c (code_motion): Use `phi_nodes' field in the bb
4280
        annotation instead of tree_phi_root.
4281
        * varray.h (union varray_data): Make basic_block_def and edge_def
4282
        varrays garbage collectable.
4283
 
4284
2003-12-07  Richard Henderson  
4285
 
4286
        * c-common.c (c_address_looks_like_offsetof): New.
4287
        * c-common.h (c_address_looks_like_offsetof): Declare.
4288
        * c-typeck.c (build_unary_op) : Use it.  Don't lower
4289
        address references not destined for offsetof.
4290
        (c_expand_return): Only look inside ARRAY_REF and COMPONENT_REF
4291
        when looking for returning address of local variable.
4292
        * expr.c (expand_expr_1): Don't dereference size of unbounded arrays.
4293
        * gimplify.c (gimplify_addr_expr): Only fold address of variable size
4294
        array elements.
4295
        * tree-simple.c (is_gimple_min_invariant): Also check
4296
        is_gimple_variable before disallowing offset address for type.
4297
        * tree-ssa-ccp.c (maybe_fold_offset_to_aggregate_ref): New.
4298
        (maybe_fold_offset_to_component_ref): Use it.
4299
        (maybe_fold_stmt_indirect, maybe_fold_stmt_plus): Likewise.
4300
        (maybe_fold_offset_to_array_ref): Likewise.  Don't fail for division
4301
        remainder non-zero.
4302
        * varasm.c (initializer_constant_valid_p) : Use
4303
        handled_component_p and look inside references.
4304
        : Always look past widening casts.
4305
 
4306
2003-12-07  Zdenek Dvorak  
4307
 
4308
        * tree-cfg.c (compute_dominance_frontiers): Don't assume that
4309
        the first block has index 0.
4310
 
4311
2003-12-07  Jan Hubicka  
4312
 
4313
        * cgraph.c (create_edge): Rename to ...
4314
        (cgraph_create_edge): ... this one; accept call_expr as operand.
4315
        (cgraph_edge): New function
4316
        (cgraph_remove_edge): Use edge as argument
4317
        (cgraph_record_call, cgraph_remove_call): Kill.
4318
        (clone_cgraphedge): New function.
4319
        * cgraph.h (cgraph_edge): Add call_expr argument; add chain_next.
4320
        (cgraph_record_call, cgraph_remove_call): Kill prototype.
4321
        (cgraph_remove_call, cgraph_inline_p): Update prototype.
4322
        (cgraph_clone_edge): Declare.
4323
        * cgraphunit.c (cgraph_finalize_function): Update use of
4324
        cgraph_remove_edge
4325
        (record_call_1): Use cgraph_create_edge; record builtins too.
4326
        (cgraph_create_edges): Accept node instead of decl.
4327
        (cgraph_analyze_function): Update use cgraph_create_edges.
4328
        (cgraph_inline_p): Accept edge.
4329
        * tree-inline.c (inline_data): Replace decl and current_decl
4330
        by node and current_node.
4331
        (copy_body_r): Clone edges.
4332
        (expand_call_inline): Do not create inlined edges.
4333
        (optimize_inline_call): Set id->current_node, id->node.
4334
        * tree-optimize.c (tree_rest_of_compilation): Update cgraph edges after
4335
        compiling.
4336
 
4337
2003-12-07  Diego Novillo  
4338
 
4339
        * tree-ssa-loop.c (dump_file, dump_flags): Only declare with
4340
        checking enabled.
4341
        (tree_ssa_loop_opt): Mark arguments with ATTRIBUTE_UNUSED.
4342
 
4343
2003-12-07  Richard Henderson  
4344
 
4345
        * function.h (struct function): Add last_label_uid.
4346
        * tree-cfg.c (set_bb_for_stmt): Use it.
4347
        (delete_tree_cfg): Clear label_to_block_map.
4348
 
4349
        * gimple-low.c (lower_stmt_body): Export.
4350
        (lower_stmt): Allow data to be null.
4351
        * gimplify.c (declare_tmp_vars): Make static.
4352
        (push_gimplify_context): Export.
4353
        (pop_gimplify_context): Export.  Put the temps somewhere.
4354
        (gimplify_body): Don't declare_tmp_vars here.
4355
        * tree-flow.h, tree-simple.h: Update for new decls.
4356
 
4357
        * tree-mudflap.c (mf_build_string): New.
4358
        (mudflap_c_function_decls): Push and pop gimplify context, don't
4359
        gimplify here.  Dump pass 1.
4360
        (mudflap_c_function_ops): Similarly.
4361
        (mf_decl_cache_locals): Gimplify eveything as we go along.
4362
        (mf_build_check_statement_for): Likewise.
4363
        (mf_mostly_copy_tree_r): Remove.
4364
        (mf_varname_tree): Use mf_build_string.
4365
        (mf_file_function_line_tree): Rewrite.
4366
        (mf_offset_expr_of_array_ref): Remove.
4367
        (mx_xfn_indirect_ref): Remove.
4368
        (mf_xform_derefs_1): New.
4369
        (mf_xform_derefs): Rewrite to expect gimple.
4370
        (mx_register_decls): Use build_function_call_expr.
4371
        (mudflap_enqueue_constant): Use mf_build_string.
4372
        * tree-optimize.c (tree_rest_of_compilation): Reorder mudflap bits.
4373
        * tree-dump.c (dump_files): Split mudflap to parts 1 and 2.
4374
        * tree.h (enum tree_dump_index): Likewise.
4375
 
4376
2003-12-06  Zdenek Dvorak  
4377
 
4378
        * tree-ssa-loop.c: New.
4379
        * Makefile.in (tree-ssa-loop.o): New.
4380
        * common.opt (ftree-loop-optimize): Add.
4381
        * flags.h (flag_tree_loop): Declare.
4382
        * opts.c (decode_options): Enable flag_tree_loop at -O1.
4383
        (common_handle_option): Handle OPT_ftree_loop_optimize.
4384
        * timevar.def (TV_TREE_LOOP): New.
4385
        * toplev.c (flag_tree_loop): New.
4386
        (f_options): Add -ftree-loop-optimize.
4387
        * tree-cfg.c (build_tree_cfg): Remove disabled loop optimizer
4388
        initialization.
4389
        (tree_make_forwarder_block): Update phi nodes.
4390
        (tree_loop_optimizer_init): Don't call force_single_succ_latches.
4391
        (tree_try_redirect_by_replacing_jump): Comment fix.
4392
        * tree-dump.c (dump_files): Add .loop dump.
4393
        * tree-flow.h (tree_ssa_loop_opt, set_phi_nodes): Declare.
4394
        * tree-optimize.c (optimize_function_tree): Call tree_ssa_loop_opt.
4395
        * tree.h (enum tree_dump_index): Add TDI_loop.
4396
        * tree-flow-inline.h (set_phi_nodes): New.
4397
        * doc/invoke.texi (-fdump-tree-loop, -ftree-loop-optimize): Document.
4398
 
4399
2003-12-05  Jeff Law  
4400
 
4401
        * tree-dfa.c (mark_new_vars_to_rename): Change VARS_TO_RENAME to be
4402
        a "bitmap" instead of an "sbitmap".  Callers updated.
4403
        * tree-must-alias.c (promote_var): Likewise.
4404
        (tree_compute_must_alias): Likewise.
4405
        * tree-phinodes.c (remove_all_phi_nodes_for): Likewise.
4406
        * tree-ssa-dom.c (tree_ssa_dominator_thread_jumps): Likewise.
4407
        (tree_ssa_dominator_optimize): Likewise.
4408
        (tree_ssa_dominator_optimize_1): Likewise.
4409
        * tree-ssa-pre.c (pre_expression): Likewise.
4410
        (tree_perform_ssapre): Likewise.
4411
        * tree-ssa.c (rewrite_into_ssa): Likewise.
4412
        (insert_phi_nodes): If VARS_TO_RENAME is zero, then examine
4413
        each node to determine if we need to insert a PHI.
4414
        (prepare_operand_for_rename): If VARS_TO_RENAME is zero, then
4415
        assume the operand needs renaming.
4416
        * tree-ssa-ccp.c (substitute_and_fold): Change VARS_TO_RENAME to
4417
        be a "bitmap" instead of an "sbitmap".  Callers updated.
4418
        (tree_ssa_ccp): Likewise.  Also make sure timevar_pop encloses
4419
        entire function.
4420
        (scalarize_modify_expr): Likewise.
4421
        * tree-sra.c (create_scalar_copies): Change VARS_TO_RENAME to
4422
        be a "bitmap" instead of an "sbitmap".  Callers updated.
4423
        (tree_sra): Likewise.
4424
        * tree-optimize.c (optimize_function_tree): Make VARS_TO_RENAME
4425
        be a "bitmap" instead of an "sbitmap".
4426
        * tree-flow.h: Update various prototypes.
4427
 
4428
2003-12-05  Zdenek Dvorak  
4429
 
4430
        * tree-cfg.c (remove_useless_stmts_goto, remove_useless_stmts): Move
4431
        handling of factored_computed_goto ...
4432
        (disband_implicit_edges): ... here.
4433
 
4434
2003-12-05  Jan Hubicka  
4435
 
4436
        * tree-eh.c (tree_could_trap_p): Fix warning.
4437
        * expr.c (expand_expr): Fix warning on uninitialized last.
4438
 
4439
2003-12-04  Jeff Law  
4440
 
4441
        * tree-ssa.c (rewrite_trees): Do not unconditionally overwrite
4442
        variables set by statements.  Let replace_variable do any
4443
        required rewriting.
4444
 
4445
2003-12-04  Richard Henderson  
4446
 
4447
        * c-parse.in (primary): Use annotate_with_locus instead of
4448
        STMT_LINENO for STMT_EXPR.
4449
        * c-simplify.c (gimplify_stmt_expr): Likewise.
4450
 
4451
2003-12-04  Jan Hubicka  
4452
 
4453
        * tree-dump.c (dump_files): Reorder tailcall and mustalias
4454
        * tree.h (tree_dump_index): Likewise.
4455
        * tree-optimize.c (optimize_function_tree): Do tail call after mustalias.
4456
 
4457
2003-12-04  Diego Novillo  
4458
 
4459
        * tree-dfa.c (opf_none, opf_is_def, opf_no_vops): Change to #define.
4460
 
4461
2003-12-04  Canqun Yang  
4462
 
4463
        * stor-layout.c (update_alignment_for_field): Export.
4464
        * tree.h (update_alignment_for_field): Declare.
4465
 
4466
2003-12-03  Andrew Haley  
4467
 
4468
        * tree-eh.c (tree_could_trap_p): Add division instructions.
4469
        * expr.c (expand_expr): Check the EH region of an expression and
4470
        mark all the insns that result from its expansion with the
4471
        appropriate REG_EH_REGION.
4472
 
4473
2003-12-03  Jan Hubicka  
4474
 
4475
        * tree-cfg.c (verify_addr_expr, verify_stmt, tree_node_shared_p,
4476
        verify_stmts):  New functions.
4477
        (verify_flow_info): Remove PHI checking code.
4478
        * tree-flow.h (verify_stmt, verify_stmts): Declare.
4479
        * tree-inline.h (walk_tree, walk_tree_without_duplicates): Move
4480
        prototypes ...
4481
        * tree.h (walk_tree, walk_tree_without_duplicates): ... here.
4482
 
4483
2003-12-03  Jan Hubicka  
4484
            Diego Novillo 
4485
 
4486
        * tree-ssa.c (verify_def, verify_use, verify_phi_args): New static
4487
        functions.
4488
        (verify_ssa): New global function.
4489
        * tree-flow.h (verify_ssa): Declare.
4490
        * tree-optimize.c (optimize_function_tree): Call it.
4491
 
4492
2003-12-03  Diego Novillo  
4493
 
4494
        * timevar.def (TV_TREE_SSA_VERIFY): New timer.
4495
        * tree-sra.c (create_scalar_copies): Always mark the previous
4496
        variables on the LHS for renaming.
4497
        Do not emit unnecessary assignments from VA_ARG_EXPRs.
4498
        (scalarize_modify_expr): Similarly, when scalarizing the LHS of a
4499
        COMPONENT_REF assignment.
4500
        * tree-must-alias.c (tree_compute_must_alias): Do not promote
4501
        variables with hidden uses.
4502
        * tree-ssa-ccp.c (set_rhs): When replacing the whole statement, reset
4503
        SSA_NAME_DEF_STMT for all the SSA_NAMEs in vdef and def
4504
        operands.
4505
 
4506
2003-12-03  Zdenek Dvorak  
4507
            Diego Novillo  
4508
 
4509
        * tree-dfa.c (opf_no_vops): New.
4510
        (add_stmt_operand): Don't create virtual operands when opf_no_vops
4511
        is passed in flags.
4512
        (get_expr_operands): Set opf_no_vops flag before diving into the
4513
        operand of an ADDR_EXPR node.
4514
 
4515
2003-12-03  Richard Henderson  
4516
 
4517
        * tree-simple.c (is_gimple_min_invariant): Disallow offset of
4518
        address of a scalar.
4519
 
4520
        * c-parse.in (primary): Set STMT_LINENO on STMT_EXPR.
4521
        * c-simplify.c (gimplify_stmt_expr): Be prepared for last_stmt
4522
        to be null.
4523
 
4524
2003-12-03  Daniel Berlin  
4525
 
4526
        Fix PR 13177
4527
        * tree-ssa-pre.c (code_motion): Do phi nodes last, and rearrange
4528
        how we decide what temporary to choose so that we get it right.
4529
 
4530
2003-12-03  Zdenek Dvorak  
4531
 
4532
        * tree-dfa.c (get_expr_operands): Don't record VUSEs for invariant
4533
        adresses.
4534
 
4535
2003-12-03  Brian Booth  
4536
 
4537
        * tree-pretty-print.c (dump_phi_nodes): Removed superfluous ampersand.
4538
 
4539
2003-12-03  Jeff Law  
4540
 
4541
        * ggc-page.c: Resync with mainline sources.  Remove tree-ssa
4542
        specific hack which disabled special GC pagesizes for 2 operand
4543
        tree expressions.
4544
 
4545
        * tree-ssa.c (mark_def_sites): Call prepare_operand_for_rename
4546
        on the VDEF_RESULT as well, providing a dummy uid argument.
4547
 
4548
        * tree-phinodes.c: Include rtl.h for ceil_log2.
4549
        (ideal_phi_node_len): New function.
4550
        (resize_phi_node): Make static.
4551
        (make_phi_node): Use ideal_phi_node_len.
4552
        (add_phi_arg): Likewise.
4553
        * tree.h (resize_phi_node): Remove prototype.
4554
        * Makefile.in (tree-phinodes.o): Depend on $(RTL_H).
4555
 
4556
2003-12-03  Zdenek Dvorak  
4557
 
4558
        * tree-cfg.c: (make_edges): Eliminate fallthru to exit.
4559
        (make_ctrl_stmt_edges): Nonlocal goto handling moved to
4560
        make_goto_expr_edges.
4561
        (make_goto_expr_edges): Remove simple gotos.
4562
        (cfg_remove_useless_stmts_bb): Goto removal cancelled.
4563
        (cleanup_cond_expr_graph, cleanup_switch_expr_graph):
4564
        Replaced by ...
4565
        (cleanup_control_expr_graph): New.
4566
        (cleanup_control_flow): Use it.
4567
        (disband_implicit_edges): New.
4568
        (tree_find_edge_insert_loc): Never insert before a control statement.
4569
        (tree_split_edge, thread_jumps, tree_try_redirect_by_replacing_jump,
4570
        tree_redirect_edge_and_branch): Work over no-gotos form.
4571
        (tree_verify_flow_info): Check no-gotos form invariants.
4572
        * tree-pretty-print.c (pp_cfg_jump, dump_implicit_edges): New.
4573
        (dump_generic_bb_buff): Call dump_implicit_edges.
4574
        * tree-flow.h (cleanup_cond_expr_graph, cleanup_switch_expr_graph):
4575
        Declaration removed.
4576
        (cleanup_control_expr_graph, delete_tree_ssa, disband_implicit_edges):
4577
        Declare.
4578
        * tree-optimize.c (tree_ssa_finish): New.
4579
        (optimize_function_tree): Call it.
4580
        * tree-ssa-dom.c (thread_jumps_walk_stmts, optimize_stmt): Use
4581
        cleanup_control_expr_graph.
4582
        * tree-ssa.c (delete_tree_ssa): Export, work even if there are no
4583
        referenced_vars.
4584
        (rewrite_out_of_ssa): Don't call it.
4585
 
4586
2003-12-03  Jan Hubicka  
4587
 
4588
        * tree-ssa.dom.c (tree_ssa_domionator_thread_jumps): Mark back edges.
4589
        (thread_across_edge): Do not thread across loop headers.
4590
 
4591
        * Makefile.in (tree-optimize.o): Depend on cgraph.h
4592
        * cgraph.h (cgraph_preserve_function_body_p): Declare.
4593
        * cgraphunit.c (cgraph_preserve_function_body_p): New function.
4594
        * tree-optimize.c: Include cgraph.h
4595
        (clear_decl_rtl): Kill.
4596
        (tree_rest_of_compilation): Use cgraph_preserve_function_body_p;
4597
        do not clear DECL_RTL; do final ggc in the pushed context for nested
4598
        functions;
4599
 
4600
2003-12-02  Jeff Law  
4601
 
4602
        * tree-ssa-dom.c (optimize_stmt): Accept and pass down dominator
4603
        walker structure instead of individual varrays.  Callers updated.
4604
        (eliminate_redundant_computations): Likewise.
4605
        (simplify_rhs_and_lookup_avail_expr): Likewise.  Cache and update
4606
        a dummy COND_EXPR when querying the hash tables when transforming
4607
        DIV/MOD into RSHIFT/BIT_AND or ABS_EXPR into NEG_EXPR.
4608
        (dom_opt_walk_stmts): Don't reload the block data pointer each
4609
        iteration of the loop.  Load it once outside the loop.
4610
 
4611
        * tree-dfa.c (cleanup_operand_arrays): Avoid creating a new
4612
        varray for the vuse operands.
4613
 
4614
        * tree-ssa-dom.c (extract_range_from_cond): Use int_const_binop to
4615
        avoid creating useless tree nodes.
4616
 
4617
        * tree-phinodes.c (add_phi_arg): If we receive a new node from
4618
        resize_phi_node, then release the old node and update the PHI
4619
        chain.
4620
 
4621
2003-12-02  Brian Booth  
4622
 
4623
        * tree-pretty-print.c (dump_phi_nodes): Added code to always show phi
4624
        nodes of regular gimple scalars.
4625
        (dump_generic_bb_buff): Removed condition upon which to show phi nodes.
4626
 
4627
2003-12-02  Jan Hubicka  
4628
 
4629
        * tree-optimize.c (optimize_function_tree): Invoke ggc_collect in
4630
        between optimization passes.
4631
 
4632
2003-12-02  Daniel Berlin  
4633
 
4634
        * tree-sra.c (can_be_scalarized_p): Print details about why something
4635
        could not be scalarized to the dump file.
4636
 
4637
2003-12-01  Jeff Law  
4638
 
4639
        * Makefile.in (OBJS-common): Add tree-phinodes.o.
4640
        (tree-phinodes.o): Add dependencies.
4641
        (GTFILES): Add tree-phinodes.c.
4642
        * tree-phinodes.c: New file.
4643
        * tree-dfa.c (create_phi_node): Moved to tree-phinodes.o.
4644
        (add_phi_arg, remove_phi_arg, remove_phi_arg_num): Similarly.
4645
        (remove_phi_node, remove_all_phi_nodes_for): Similarly.
4646
        * tree-ssa.c (init_tree_ssa): Initialize PHI node management.
4647
        (delete_tree_ssa): Finalize PHI node management.
4648
        * tree.c (dump_tree_statistics): Dump PHI node stats.
4649
        (make_phi_node, resize_phi_node): Moved to tree-phinodes.o.
4650
        * tree.h (init_phinodes): Prototype.
4651
        (fini_phinodes, release_phi_node): Likewise.
4652
        (phinodes_print_statistics): Likewise.
4653
 
4654
2003-12-01  Richard Henderson  
4655
 
4656
        * tree-dfa.c (get_expr_operands): Don't handle PLUS_EXPR inside
4657
        INDIRECT_REF.
4658
        * tree-ssa-ccp.c (maybe_fold_offset_to_array_ref): Use int_const_binop.
4659
        (maybe_fold_offset_to_component_ref): Likewise.
4660
        (maybe_fold_stmt_indirect): Likewise.
4661
        (maybe_fold_stmt_plus): Expand ARRAY_REF when seen with addend.
4662
        * fold-const.c (int_const_binop): Export.
4663
        * tree.h (int_const_binop): Declare.
4664
 
4665
2003-12-01  Jan Hubicka  
4666
 
4667
        * basic-block.h (tree_phi_root): New variable.
4668
        * cfg.c: Include tree-flow.h.
4669
        (compact_blocks): Compact tree_phi_root
4670
        * tree-cfg.c (build_tree_cfg): Initialize tree_phi_root.
4671
        (create_bb, remove_bb, delete_tree_cfg): Update tree_phi_root.
4672
        * tree-dfa.c (tree_phi_root): Declare.
4673
        (create_phi_node, add_phi_arg, remove_phi_node,
4674
        remove_all_phi_nodes_for):  Always use accessor functions for
4675
        getting, varray for setting phis.
4676
        * tree-ssa-pre.c (code_motion): Likewsie.
4677
        * tree-flow-inline.h (phi_nodes): Use varray.
4678
        * tree-flow.h (bb_ann_d): Remove phi_nodes.
4679
 
4680
        * tree-ssanames.c (free_ssanames): Do not use deleteable GTY flag.
4681
 
4682
2003-11-30  Jan Hubicka  
4683
 
4684
        * tree-optimize.c (tree_rest_of_compilation): Move ggc_collect call to
4685
        the end of function; keep clearing of DECL_SAVED_TREE to the cgraph
4686
        code.
4687
 
4688
2003-11-30  Jan Hubicka  
4689
 
4690
        * cgraphunit.c (cgraph_inline_context): New structure.
4691
        (cgrpah_mark_inline, cgraph_check_inline_limits): Use context
4692
        instead of passing all arguments by hand.
4693
        (cgraph_create_inline_context, cgraph_free_inline_context,
4694
        cgraph_inline_context_set_caller, cgraph_inline_context_clear_caller,
4695
        cgraph_inline_context_set_callee, cgrpah_inline_context_clear_callee,
4696
        cgraph_recursive_inlining_p): New static function.
4697
        (cgraph_decide_inline*):  Reorganize to use context.
4698
 
4699
2003-11-30  Paul Brook  
4700
 
4701
        * Makefile.in (GTFILES): Remove stray '\'.
4702
 
4703
2003-11-30  Daniel Berlin  
4704
 
4705
        * c-config-lang.in: Move tree-alias-* from here
4706
        * Makefile.in (GTFILES): To here.
4707
        * tree-alias-ander.c: Include bitmap.h
4708
        (andersen_function_call): Updated to take address of variables
4709
        in an ADDR_EXPR in a CALL_EXPR.
4710
        * tree-alias-common.h (struct tree_alias_ops): Update arguments to
4711
        function_call.
4712
        * tree-alias-type.h (struct alias_typevar_common): Add varnum.
4713
        * tree-alias-common.c: Include bitmap.h, and function.h.
4714
        s/global_var/pta_global_var/g.
4715
        (addrargs): New static variable.
4716
        (pta_global_var): Ditto.
4717
        (find_func_decls): Remove.
4718
        (find_func_aliases): Take one argument, update all callers.
4719
        Handle (cast) [addr-expr] [var].
4720
        Handle COMPONENT_REF of an  INDIRECT_REF.
4721
        Pass info about ADDR_EXPR arguments to function_call function.
4722
        (deal_with_call_aliasing): New function.
4723
        (call_may_return): New function.
4724
        (get_alias_var_decl): Call find_func_aliases on the DECL_INITIAL
4725
        of a global var.
4726
        Use ALIAS_TVAR_VARNUM, instead of VARRAY_ACTIVE_SIZE (alias_vars) - 1.
4727
        (get_alias_var): Handle REALPART_EXPR and IMAGPART_EXPR.
4728
        Return NULL in default case.
4729
        (intra_function_call): Remove wrong code.
4730
        (create_fun_alias_var): Use simple_assign, not addr_assign.
4731
        Set up ALIAS_TVAR_VARNUM when creating an alias var.
4732
        (create_fun_alis_var_ptf): Ditto on ALIAS_TVAR_VARNUM.
4733
        (create_alias_var): Ditto.
4734
        (create_alias_vars):  Build pta_global_var here.
4735
        Walk unexpanded_var_list.
4736
        Walk the statements in basic blocks.
4737
        (delete_alias_vars): Correct ip_partial case.
4738
        Free addrargs.
4739
        (init_alias_vars): Create addrargs.
4740
 
4741
2003-11-29  Jan Hubicka  
4742
 
4743
        * Makefile.in (tree-ssanames.o): Depend on gt-tree-ssanames.h.
4744
        (tree-eh.o): Depend on gt-tree-eh.h.
4745
        (gr-tree-ssanames.h, gt-tree-eh.h): New targets.
4746
        (GTFILES): Add tree-ssanames.c, tree-eh.c
4747
        * tree-eh.c: Include ggc.h and gt-tree-eh.h
4748
        (lower_eh_constructs): Allecate throw_stmt_table in ggc.
4749
        * tree-ssanames.c: Include ggc.h and gt-tree-ssanames.h
4750
 
4751
        * function.h (struct function): Add saved_tree/saved_args.
4752
        * toplev.c (rest_of_compilation): Move code to  clear cfun and
4753
        DECL_SAVED_INSNS and call to ggc_collect to ...
4754
        * tree-optimize.c (tree_rest_of_compilation): ... this function. Use
4755
        cfun to save/restore function body.
4756
 
4757
2003-11-28  Richard Henderson  
4758
 
4759
        * gimplify.c (create_tmp_var_raw): Split out from create_tmp_var.
4760
        (create_tmp_var): Use it.
4761
        (create_tmp_alias_var): Remove.
4762
        * tree-alias-common.c, tree-dfa.c: Use create_tmp_var_raw instead.
4763
        * tree-simple.h: Update decls.
4764
 
4765
2003-11-28  Richard Henderson  
4766
 
4767
        * gimple-low.c (lower_function_body): Call lower_bind_expr
4768
        to handle the outermost BIND_EXPR.
4769
 
4770
2003-11-28  Jan Hubicka  
4771
 
4772
        * tree-ssa.c (remove_annotations_r): Kill.
4773
        (delete_tree_ssa): Remove annotations using statement walk;
4774
        kill argument fndecl.
4775
        (rewrite_out_of_ssa): Update call.
4776
 
4777
2003-11-27  Andrew MacLeod  
4778
 
4779
        * tree-ssa-live.c (register_ssa_partition): Abort if a virtual SSA
4780
        version is registered.
4781
        (create_ssa_var_map): Always process PHI nodes.
4782
        * tree-ssa.c (Eliminate_virtual_phis): Rename from
4783
        eliminate_extraneous_phis, and look specifically for virtuals.
4784
        (rewrite_out_of_ssa): Eliminate virtual PHI nodes before building
4785
        partitions.
4786
 
4787
2003-11-27  Zdenek Dvorak  
4788
 
4789
        * tree-ssa-ccp.c (get_strlen): Mark the visited variables.
4790
        (ccp_fold_builtin): Changed due to changed calling convention of
4791
        get_strlen.
4792
 
4793
2003-11-26  Diego Novillo  
4794
 
4795
        Revert
4796
 
4797
        2003-11-25  Jeff law  
4798
 
4799
            * Makefile.in (OBJS-common): Add tree-phinodes.o.
4800
            (tree-phinodes.o): Add dependencies.
4801
            * tree-phinodes.c: New file.
4802
            * tree-dfa.c (create_phi_node): Moved to tree-phinodes.o.
4803
            (add_phi_arg, remove_phi_arg, remove_phi_arg_num): Similarly.
4804
            (remove_phi_node, remove_all_phi_nodes_for): Similarly.
4805
            * tree-ssa.c (init_tree_ssa): Initialize PHI node management.
4806
            (delete_tree_ssa): Finalize PHI node management.
4807
            * tree.c (dump_tree_statistics): Dump PHI node stats.
4808
            (make_phi_node, resize_phi_node): Moved to tree-phinodes.o.
4809
            * tree.h (init_phinodes): Prototype.
4810
            (fini_phinodes, release_phi_node): Likewise.
4811
            (phinodes_print_statistics): Likewise.
4812
 
4813
2003-11-25  Jan Hubicka  
4814
 
4815
        * tree-mustalias.c (promote_var): Do not clear
4816
        may_point_to_global_mem.
4817
 
4818
2003-11-25  Jeff law  
4819
 
4820
        * domwalk.c (walk_dominator_tree): Indicate to the block local
4821
        data initializer if the block local data is new or recycled.
4822
        * domwalk.h (struct dom_walk_data): Corresponding changes.
4823
        * tree-ssa-dom.c (dom_opt_initialize_block_local_data): Accept and use
4824
        "recycled" argument.  For recycled structures, only clear varrays
4825
        that have been initialized.  For new blocks, do not initialize
4826
        varrays here.
4827
        (dom_opt_finalize_block): When threading across edges, if the
4828
        true/false varrays have not been initialized, then the limit is zero.
4829
        Only clear block local varrays that have been initialized.
4830
        (record_equivalences_from_incoming_edge): If necessary, initialize
4831
        block local const_and_copies.
4832
        (dom_opt_walk_stmts): If necessary, initialize block local
4833
        stmts_to_rescan.
4834
        (record_var_is_nonzero): If necessary, initialize block local
4835
        nonzero_vars.
4836
        (record_cond_is_true): If necessary, initialize block local
4837
        true_exprs.
4838
        (record_cond_is_false): If necessary, initialize block local
4839
        false_exprs.
4840
        (lookup_avail_expr): If necessary, initialize block local
4841
        avail_exprs.
4842
        (record_range): If necessary, initialize block local vrp_varaibles.
4843
        * tree-ssa.c
4844
        * tree-ssa.c (rewrite_initialize_block_local_data): Accept and use
4845
        "recycled" argument.  For recycled structures, only clear varrays
4846
        that have been initialized.  For new blocks, do not initialize
4847
        varrays here.
4848
        (rewrite_finalize_block): Only clear block local varrays that have
4849
        been initialized.
4850
        (register_new_def): If necessary, initialize block local defs.
4851
 
4852
        * tree-ssa-dom.c (get_eq_expr_value): Return a struct rather than
4853
        a tree node.
4854
        (record_equivalences_from_incoming_edge): Corresponding changes.
4855
        (find_equivalent_equality_comparison): Use tree_int_cst_XXX rather
4856
        then building and folding nodes.
4857
        (simplify_cond_and_lookup_avail_expr): Likewise.
4858
 
4859
        * Makefile.in (OBJS-common): Add tree-phinodes.o.
4860
        (tree-phinodes.o): Add dependencies.
4861
        * tree-phinodes.c: New file.
4862
        * tree-dfa.c (create_phi_node): Moved to tree-phinodes.o.
4863
        (add_phi_arg, remove_phi_arg, remove_phi_arg_num): Similarly.
4864
        (remove_phi_node, remove_all_phi_nodes_for): Similarly.
4865
        * tree-ssa.c (init_tree_ssa): Initialize PHI node management.
4866
        (delete_tree_ssa): Finalize PHI node management.
4867
        * tree.c (dump_tree_statistics): Dump PHI node stats.
4868
        (make_phi_node, resize_phi_node): Moved to tree-phinodes.o.
4869
        * tree.h (init_phinodes): Prototype.
4870
        (fini_phinodes, release_phi_node): Likewise.
4871
        (phinodes_print_statistics): Likewise.
4872
 
4873
2003-11-25  Jan Hubicka  
4874
 
4875
        * tree-inline.c (save_body): New body
4876
        * tree-inline.h (save_body): Declare.
4877
        * tree-optimize.c (tree_rest_of_compilation): Save function tree
4878
        properly.
4879
 
4880
2003-11-24  Richard Henderson  
4881
 
4882
        * gimplify.c (canonicalize_addr_expr): New.
4883
        (gimplify_conversion): Use it.  Canonicalize after nop cast removal.
4884
        * tree-simple.c (is_gimple_min_invariant): Remove STRING_CST cast
4885
        special case.
4886
 
4887
2003-11-24  Jeff Law  
4888
 
4889
        * flow.c (count_or_remove_death_notes_bb): New.  Extracted from
4890
        count_or_remove_death_notes.
4891
        (count_or_remove_death_notes): Use EXECUTE_IF_SET_IN_SBITMAP.
4892
 
4893
2003-11-24  Richard Henderson  
4894
 
4895
        PR 13174, PR 13143
4896
        * gimplify.c (cpt_same_type): Allow different ARRAY_TYPEs with
4897
        the same base type.
4898
 
4899
2003-11-24  Daniel Berlin  
4900
 
4901
        Fix PR/13163
4902
        * tree-ssa-pre.c (append_eref_to_block): Delete.
4903
        (insert_euse_in_preorder_dt_order_1): Ditto.
4904
        (insert_one_operand): Take an extra argument, because
4905
        avdefs may need to be changed.
4906
        (clear_all_eref_arrays): Use FOR_ALL_BB.
4907
        (insert_occ_in_preorder_dt_order): Stop appending to bb eref arrays.
4908
        Use FOR_ALL_BB.
4909
        (insert_euse_in_preorder_dt_order): Rewrite to just build a new varray
4910
        with only the EPHI's and EUSE's, and then sort it.
4911
        (pre_expression): Don't use bb based erefs array when printing
4912
        expressions.
4913
        (split_critical_edges): Just use FOR_ALL_BB.
4914
        (tree_perform_ssapre): Pre-split entry block successor edge if the
4915
        successor block has multiple preds.
4916
 
4917
        * tree-flow.h (struct bb_ann_d): Remove erefs varray.
4918
 
4919
2003-11-24  Daniel Berlin  
4920
 
4921
        * tree-cfg.c (cleanup_tree_cfg): FOR_EACH_BB -> FOR_ALL_BB when
4922
        clearing dom children, because the entry block has dom_children
4923
        too.
4924
        * tree-ssa.c (build_dominator_tree): Ditto.
4925
 
4926
2003-11-24  Diego Novillo  
4927
 
4928
        * tree-cfg.c (compute_dominance_frontiers_1,
4929
        compute_dominance_frontiers): Move from ssa.c.
4930
        * tree-flow.h (compute_dominance_frontiers): Declare.
4931
        * Makefile.in (tree-ssa.o, tree-ssa-live.o, tree-ssa-pre.o,
4932
        tree-optimize.o): Don't depend on ssa.h.
4933
        * tree-ssa.c: Don't include ssa.h.
4934
        * tree-ssa-live.c: Likewise.
4935
        * tree-ssa-pre.c: Likewise.
4936
        * tree-optimize.c: Likewise.
4937
 
4938
2003-11-24  Jan Hubicka  
4939
 
4940
        * fold-const.c (fold):  Do not return early when
4941
        optimizing COMPONENT_REF and constant.
4942
 
4943
2003-11-24  Richard Henderson  
4944
 
4945
        * objc/objc-act.c (build_protocol_expr): Use convert instead of
4946
        smashing TREE_TYPE.
4947
 
4948
2003-11-23  Andrew MacLeod  
4949
 
4950
        * tree-ssa-live.h (SSANORM_PERFORM_TER, SSANORM_COMBINE_TEMPS,
4951
        SSANORM_REMOVE_ALL_PHIS): New flag macros.
4952
        * tree-ssa.c (replace_variable): Return true if var was rewritten.
4953
        (eliminate_extraneous_phis): Dump var map to file if checking triggers
4954
        an abort.
4955
        (rewrite_trees): Set modified_stmt if stmt was changed.
4956
        (remove_ssa_form): Move more of rewrite_out_of_ssa to make it serve
4957
        all the same functions based on new flags in tree-ssa-live.h.
4958
        (rewrite_out_of_ssa): Call remove_ssa_form.
4959
 
4960
2003-11-23  Jan Hubicka  
4961
 
4962
        * tree-cfg.c (tree_verify_flow_info): Check that ENTRY/EXIT block
4963
        has no instructions associated with it.
4964
 
4965
2003-11-22  Jeff Law  
4966
 
4967
        * tree-ssa-names.c (release_ssa_name): Use SSA_NAME_IN_FREE_LIST
4968
        instead of checking SSA_NAME_DEF_STMT being null.
4969
        * tree.h (SSA_NAME_DEF_STMT): Use chain field rather than the
4970
        def_stmt field.
4971
        (SSA_NAME_OCCURS_IN_ABNORMAL_PHI): Use existing flag from tree_common.
4972
        (SSA_NAME_IN_FREE_LIST): Define.
4973
        (struct tree_ssa_name): Kill DEF_STMT and OCCURS_IN_ABNORMAL_PHI fields.
4974
 
4975
2003-11-22  Zdenek Dvorak  
4976
 
4977
        * tree-pretty-print.c (dump_generic_node): Remove superfluous ';'.
4978
 
4979
2003-11-22  Diego Novillo  
4980
 
4981
        * Makefile.in (simple-break-elim.o): Remove.
4982
        (simple-goto-elim.o): Remove.
4983
        (tree-dchain.o): Remove.
4984
        * simple-break-elim.c: Remove.
4985
        * simple-goto-elim.c: Remove.
4986
        * tree-dchain.c: Remove.
4987
        * tree-dchain.h: Remove.
4988
 
4989
2003-11-22  Daniel Berlin  
4990
 
4991
        * tree-ssa-pre.c (build_dfs_id_array_1): > should be >=
4992
        (build_dfn_array): Ditto.
4993
 
4994
2003-11-21  Diego Novillo  
4995
 
4996
        * Makefile.in (tree-dfa.o): Add dependency on $(TREE_DUMP_H)
4997
        * tree-dfa.c: Include tree-dump.h
4998
        (compute_alias_sets): Call dump_function_to_file.
4999
        (may_access_global_mem_p): Check if the base address of _REF nodes
5000
        may point to global memory.
5001
 
5002
        * cfgcleanup.c (try_crossjump_to_edge): Initialize newpos1 and
5003
        newpos2.
5004
 
5005
2003-11-21  Jeff Law  
5006
 
5007
        Revert:
5008
 
5009
        2003-11-21  Jan Hubicka  
5010
 
5011
                * tree-dfa.c (get_expr_operands): Fix handling of CALL_EXPR.
5012
                * tree-must-alias.c (tree_compute_must_alias): promote pointers.
5013
                (find_addressable_vars):  Deal with complex constant
5014
                expressions; do not clear may_point_to_global_mem.
5015
 
5016
2003-11-21  Jeff Law  
5017
 
5018
        * Makefile.in (domwalk.o): Depend on $(GGC_H).
5019
        * domwalk.c: Include ggc.h.
5020
        (walk_dominator_tree): Manage allocation/deallocation and
5021
        pushing/popping of the toplevel block data pointer here.
5022
        Use callback to initialize the block local data.
5023
        (init_walk_dominator_tree): New function.
5024
        (fini_walk_dominator_tree): Likewise.
5025
        * domwalk.h (struct dom_walk_data): Add callback to initialize
5026
        block local data.  Add field for sizeof block local data.
5027
        Add "private" field free_block_data.
5028
        (init_dominator_tree, fini_dominator_tree): Prototype.
5029
        * tree-ssa-dom.c (dom_opt_initialize_local_data): New function.
5030
        (tree_ssa_dominator_optimize_1): Initialize new fields in the
5031
        dominator walker structure.  Initialize and finalize the dominator
5032
        walker.  Slightly reorder code to make it more readable..
5033
        (dom_opt_initialize_block): No longer deal with allocation and
5034
        initialization of block local data.
5035
        (dom_opt_finalize_block): Similarly for deallocation of block
5036
        local data.
5037
        * tree-ssa.c (rewrite_block_data): New structure.
5038
        (rewrite_initialize_block_local_data): New function.
5039
        (rewrite_initialize_block): No longer deal with allocation and
5040
        initialization of block local data.
5041
        (rewrite_into_ssa): Initialize new fields in the dominator walker
5042
        structure.  Initialize and finalize the dominator walker.
5043
        (rewrite_initialize_block): No longer deal with allocation and
5044
        initialization of block local data.
5045
        (rewrite_optimize_stmts): Deal with changes in the dominator
5046
        walker structure.
5047
        (rewrite_finalize_block): No longer with deallocation of block
5048
        local data.
5049
 
5050
        * tree-dfa.c (add_vdef, cleanup_voperand_arrays): Use NUM_VDEFS.
5051
        (mark_new_vars_to_rename, collect_dfa_status_r): Likewise.
5052
        * tree-pretty-print.c (dump_vops): Likewise.
5053
        * tree-sra.c (create_scalar_copies): Likewise.
5054
        * tree-ssa-dce.c (stmt_useful_p, process_worklist): Likewise.
5055
        * tree-ssa-live.c (create_ssa_var_map): Likewise.
5056
        (calculate_live_on_entry): Likewise.
5057
        * tree-ssa-pre.c (process_left_occs_and_kills): Likewise.
5058
        * tree-ssa.c (mark_def_sites, rewrite_stmt): Likewise.
5059
        * tree.h (NUM_VDEFS): Define.
5060
        * tree-ssa-ccp.c (visit_stmt): Use NUM_VDEFS.  Fix thinko in last
5061
        change.
5062
        (initialize): Use NUM_VDEFS.
5063
 
5064
        * tree-dfa.c (add_vdef): Revamp to handle new method for
5065
        recording vdefs.
5066
        (cleanup_operand_arrays): Similarly.
5067
        * tree-sra.c (create_scalar_copies): Similarly.
5068
        * tree-ssa-ccp.c (visit_stmt, initialize): Similarly.
5069
        * tree-ssa-dce.c (stmt_useful_p, process_worklist): Similarly.
5070
        * tree-ssa-dom.c (cprop_into_stmt): Similarly.
5071
        (record_equivalences_from_stmt): Similarly.
5072
        * tree-ssa-live.c (create_ssa_var_map): Similarly.
5073
        (calculate_live_on_entry): Similarly.
5074
        * tree-ssa.c (mark_def_sites, rewrite_stmt): Similarly.
5075
        * tree-ssa-pre.c (process_left_occr_and_kills): Similarly.
5076
        * tree-inline.c (estimate_num_insns_1): Kill VDEF_EXPR.
5077
        * tree-pretty-print.c (dump_generic_node) Kill VDEF_EXPR.
5078
        (dump_vops): Dump VDEFs here.
5079
        * tree.c (build_vdef_expr): Kill.
5080
        * tree.h (build_vdef_expr): Kill prototype.
5081
        (VDEF_RESULT, VDEF_OP): Revamp to handle new method for recording
5082
        vdefs.
5083
        * tree.def (VDEF_EXPR): Kill.
5084
 
5085
        * tree-cfg.c (cfg_remove_useless_stmts): Set both VAR and VAL to
5086
        NULL anytime one of them is determined to be invalid.
5087
 
5088
2003-11-21  Andrew MacLeod  
5089
 
5090
        * tree-ssa-live.c (compact_var_map): Fix typo.  Clear correct field.
5091
        (calculate_live_on_entry): Remove unneeded stmt.
5092
        * tree-ssa-live.h (version_to_var): New.  Return variable associated
5093
        with a specific SSA version.
5094
        * tree-ssa.c (eliminate_build): Add check that ignored results don't
5095
        have important arguments.  Allow ignored results.
5096
        (coalesce_abnormal_edges): Allow non-relevant results to be ignored.
5097
        (eliminate_extraneous_phis): Allow non-relevant results.  Check that
5098
        no important arguments are being missed.
5099
        (coalesce_vars): Non-partition variables are allowed now, just ignored.
5100
        (rewrite_trees): New.  Split out from rewrite_out_of_ssa.  Perform tree
5101
        rewriting step.
5102
        (remove_ssa_form): New.  Allow rewriting of just specified variables.
5103
        (rewrite_out_of_ssa): Use rewrite_trees and reorganize slightly to
5104
        accommodate typechecking in eliminate_extraneous_phis.
5105
 
5106
2003-11-21  Jan Hubicka  
5107
 
5108
        * tree-dfa.c (get_expr_operands): Fix handling of CALL_EXPR.
5109
        * tree-must-alias.c (tree_compute_must_alias): promote pointers.
5110
        (find_addressable_vars):  Deal with complex constant expressions;
5111
        do not clear may_point_to_global_mem.
5112
 
5113
2003-11-21  Jan Hubicka  
5114
 
5115
        * parser.c (cp_parser_postfix_expression): Initialize 's' to
5116
        NULL_TREE.
5117
 
5118
2003-11-20  Richard Henderson  
5119
 
5120
        * Makefile.in (bitmap.o-warn, caller-save.o-warn, combine.o-warn,
5121
        cgraphunit.o-warn, c-semantics.o-warn, emit-rtl.o-warn, expr.o-warn,
5122
        fold-const.o-warn, genattrtab.o-warn, regmove.o-warn, tree.o-warn,
5123
        varasm.o-warn, f/expr.o-warn, profile.o-warn): Remove.
5124
        * bitmap.c (bitmap_first_set_bit): Abort if no non-zero word found.
5125
        (bitmap_last_set_bit): Likewise.
5126
        * combine.c (get_pos_from_mask): Always set *plen.
5127
 
5128
2003-11-20  Richard Henderson  
5129
 
5130
        * tree-dfa.c (get_expr_operands): Remove handling of PLUS_EXPR
5131
        inside INDIRECT_REF.
5132
 
5133
2003-11-20  Diego Novillo  
5134
 
5135
        * tree-nomudflap.c (nogo): Fix prototype.
5136
 
5137
2003-11-20  Richard Henderson  
5138
 
5139
        * except.c (output_function_exception_table): Strip nops.
5140
        * gimplify.c (gimplify_addr_expr): Kill missing cast workaround.
5141
        (cpt_same_type, check_pointer_types_r): New.
5142
        (gimplify_body): Call it.
5143
        * tree-inline.c (insert_decl_map): New.
5144
        (remap_decl, remap_type, remap_block, copy_body_r,
5145
        initialize_inlined_parameters, declare_return_variable,
5146
        remap_save_expr, mark_local_for_remap_r): Use it.
5147
 
5148
2003-11-20  Frank Ch. Eigler  
5149
 
5150
        libstdc++/11696
5151
        * c-pragma.c (handle_pragma_redefine_extname): Define always.
5152
        (init_pragma): Activate #pragma redefine_extname for mudflap.
5153
 
5154
        * tree-inline.c (copy_tree_r): Propagate mf_marked-ness.
5155
        * tree-mudflap.c (mudflap_c_function): Break into new
5156
        _decls and _ops functions.
5157
        (mudflap_c_function_decls): Avoid unnecessary tree copying.
5158
        (mudflap_c_function_ops): Ditto.  Gimplify explicitly only for
5159
        tree dumping.
5160
        * tree-nomudflap.c: Add new stub functions.  Simplify error
5161
        message emission throughout.
5162
        * tree-mudflap.h: Corresponding changes.
5163
        * tree-optimize.c (tree_rest_of_compilation): Call the _decl
5164
        instrumentation before gimplification and ssa optimizations;
5165
        call the _ops instrumentation after ssa optimizations.
5166
 
5167
2003-11-20  Diego Novillo  
5168
 
5169
        Initial fix for PR optimization/12747
5170
 
5171
        * Makefile.in (OBJS): Add tree-sra.o
5172
        * common.opt (ftree-sra): Add.
5173
        * flags.h (flag_tree_sra): Declare.
5174
        * gimplify.c (gimplify_addr_expr): Set TREE_INVARIANT
5175
        when producing and address expression for a DECL node.
5176
        * opts.c (decode_options): Enable SRA at -O1.
5177
        (common_handle_option): Handle -ftree-sra.
5178
        * timevar.def (TV_TREE_SRA): New timer.
5179
        * toplev.c (flag_tree_sra): Define.
5180
        * tree-cfg.c (stmt_ends_bb_p): Declare extern.
5181
        (bsi_replace): Add boolean argument to specify whether to
5182
        preserve EH region information.  Update all callers.
5183
        (bsi_commit_edge_inserts): Also check the edge from ENTRY_BLOCK_PTR
5184
        to basic block 0.
5185
        Move loop body ...
5186
        (bsi_commit_edge_inserts_1): ... here.
5187
        * tree-dump.c: Add dump for SRA pass.
5188
        * tree.h (enum tree_dump_index): Modify accordingly.
5189
        (STRIP_USELESS_TYPE_CONVERSION): Define.  Update all callers to
5190
        tree_ssa_useless_type_conversion.
5191
        * tree-eh.c (add_stmt_to_eh_region): New function.
5192
        * tree-flow.h (stmt_ends_bb_p): Declare.
5193
        (add_stmt_to_eh_region): Declare.
5194
        (tree_sra): Declare.
5195
        (enum bsi_iterator_update): Mirror entries in
5196
        enum tsi_iterator_update.
5197
        * tree-optimize.c (optimize_function_tree): Call SRA pass
5198
        after must-alias.
5199
        * tree-sra.c: New file.
5200
        * doc/invoke.texi: Document -ftree-sra and -fdump-tree-sra.
5201
 
5202
2003-11-20  Andrew Macleod  
5203
 
5204
        * tree-ssa.c (check_replaceable): Return false if the LHS is a
5205
        DECL_HARD_REGISTER.
5206
 
5207
2003-11-20  Diego Novillo  
5208
 
5209
        * tree-ssa-ccp.c (set_rhs): Replace with an empty statement when
5210
        the replacement has no side effects.
5211
 
5212
2003-11-20  Jeff Law  
5213
 
5214
        * Makefile.in (OBJS-common): Kill tree-ssa-copyprop.o.
5215
        (tree-ssa-copyprop.o): Kill dependencies clause.
5216
        * common.opt (tree-copyprop): Kill option.
5217
        * flags.h (flag_tree_copyprop): Kill.
5218
        * opts.c (decode_options): Don't set flag_tree_copyprop.
5219
        (common_handle_option): Kill handling of -ftree-copyprop.
5220
        * timevar.def (TV_TREE_COPYPROP): Kill.
5221
        * toplev.c (flag_tree_copyprop): Kill.
5222
        (lang_independent_options): Kill -ftree-copyprop.
5223
        * tree-dump.c (dump_files): Kill .copyprop dump.
5224
        * tree-flow.h (tree_ssa_copyprop): Kill prototype.
5225
        (propagate_copy): Move prototype.
5226
        * tree-optimize.c (optimize_function_tree): Kill -ftree-copyprop stuff.
5227
        * tree.h (tree_dump_index): Kill TDI_copyprop.
5228
        * tree-ssa-copyprop.c: Kill.
5229
        * tree-ssa-dom.c (propagate_copy): Moved here from tree-ssa-copyprop.c.
5230
 
5231
        * tree-ssanames.c (free_ssanames): No longer a varray.
5232
        (init_ssanames, make_ssa_name, release_ssa_name): Corresponding changes.
5233
 
5234
2003-11-20  Steven Bosscher  
5235
 
5236
        * tree-ssanames.c (ssanames_print_statistics): Use ISO function
5237
        declaration.  Print unsigned ints, not usinged longs.
5238
 
5239
2003-11-18  Daniel Berlin  
5240
 
5241
        * tree-ssa-pre.c (rename_1): This should be static.
5242
        (append_eref_to_block): Don't gc allocate.
5243
        (clear_all_eref_arrays): Free the array rather than
5244
        clear them.
5245
        (rename_1): Ditto on both counts.
5246
        (free_expr_info): Free the arrays.
5247
        (collect_expressions): Don't gc allocate the arrays.
5248
 
5249
2003-11-18  Daniel Berlin  
5250
 
5251
        * tree-ssa-pre.c (insert_one_operand): Handle self-referential
5252
        ephi's properly.
5253
 
5254
2003-11-19  Jeff Law  
5255
 
5256
        * tree-ssa-dom.c (true_exprs, false_exprs): New hash tables.
5257
        (nonzero_vars): New varray.
5258
        (dom_walk_block_data): Add true_exprs, false_exprs and nonzero_vars.
5259
        (get_value_for, set_value_for): Accept additional argument indicating
5260
        which table to use.  Callers updated.
5261
        (tree_ssa_dominator_optimize_1): Initialize and wipe our new hash
5262
        tables and varray appropriately.
5263
        (dom_opt_initialize_block): Initialize new block local varrays for
5264
        true expressions, false expressions and nonzero vars.  Update call
5265
        to record_equivalences_from_incoming_edge.
5266
        (dom_opt_finalize_block): Put equivalences from taken edges
5267
        into the true_exprs and false_exprs hash tables.  Restore global
5268
        state for true_exprs, false_exprs and nonzero_vars  too.
5269
        (record_equivalences_from_incoming_edge): Accept dom_walk structure
5270
        instead of a gazillion varrays.  Pass down block local
5271
        true_exprs, false_exprs and nonzero_vars varrays to various children.
5272
        (optimize_stmt):  Accept block local nonzero_vars argument.  Pass
5273
        new varrays down to record_equivalences_from_stmt.
5274
        (thread_jumps_walk_stmt): Pass new varrays down to
5275
        record_equivalences_from_stmt.
5276
        (dom_opt_walk_stmt): Pass new varrays down to optimize_stmt.
5277
        (dump_dominator_optimizer_statistics): Dump new hash tables.
5278
        (record_cond_is_true, record_cond_is_false): Record info into
5279
        the true/false hash tables/varrays instead of the main expression
5280
        varrays.  Don't create useless tree nodes.
5281
        (record_var_is_nonzero): New function.
5282
        (record_equivalences_from_stmt): Don't generate useless tree nodes.
5283
        (lookup_avail_expr): Consult nonzero_vars and the true/false
5284
        expression tables as well.
5285
        (get_eq_expr_value): Record local true/false expressions in the
5286
        local true/false varrays rather than the main local expression
5287
        varray.
5288
        (true_false_expr_hash, true_false_expr_eq): New functions.
5289
 
5290
        * Makefile.in (OBJS-sommon): Add tree-ssanames.o.
5291
        (tree-ssanames.o): Add dependencies.
5292
        * tree-dfa.c (remove_phi_node): Release SSA_NAME expression when
5293
        we remove the PHI node.
5294
        (remove_all_phi_nodes_for): Similarly.
5295
        * tree-ssa.c (prepare_operand_for_rename): Similarly when we
5296
        strip away an SSA_NAME expression from an operand.
5297
        (init_tree_ssa): Call the SSA_NAME initializer.
5298
        (delete_tree_ssa): Call the SSA_NAME finalizer.
5299
        * tree-ssa-dom.c (tree_ssa_dominator_optimize_1): Clear the
5300
        const_and_copies and vrp_data virtual arrays.
5301
        * tree-ssanames.c: New file for management of SSA_NAME expressions.
5302
        * tree.h: Prototypes for functions exported by tree-ssanames.c.
5303
        * tree-flow.h, tree-ssa-ccp.c, tree-ssa-dce.c: Use highest_ssa_version
5304
        rather than next_ssa_version.
5305
        * tree-ssa-dom.c, tree-ssa-live.c, tree-ssa.c: Similarly.
5306
        * tree.c (dump_tree_statistics): Call into tree-ssaname statistics
5307
        dumper too.
5308
        (make_ssa_name): Kill.  Now in tree-ssanames.c
5309
 
5310
2003-11-18  Richard Henderson  
5311
 
5312
        * tree.c (recompute_tree_invarant_for_addr_expr): Split out from ...
5313
        (build1): ... here.
5314
        * tree.h: Declare it.
5315
        * gimplify.c (gimplify_addr_expr): Use it.
5316
        * tree-ssa-ccp.c (maybe_fold_offset_to_array_ref): Split out
5317
        from fold_indirect_refs_r.
5318
        (maybe_fold_stmt_indirect): Likewise.
5319
        (maybe_fold_offset_to_component_ref): New.
5320
        (maybe_fold_stmt_plus): New.
5321
        (fold_stmt_r): Rename from fold_indirect_refs_r.
5322
        (fold_stmt): Strip more useless type conversions.
5323
 
5324
2003-11-18  Richard Henderson  
5325
 
5326
        * tree-cfg.c (dump_function_to_file): Mind when cfun is null.
5327
 
5328
2003-11-18  Diego Novillo  
5329
 
5330
        Revert
5331
 
5332
        2003-11-18  Jan Hubicka  
5333
 
5334
                * tree-cfg.c (cfg_remove_useless_stmts_bb): Avoid crash.
5335
                * tree-dfa.c (get_expr_operands): Fix handling of CALL_EXPR.
5336
 
5337
        2003-11-18  Jan Hubicka  
5338
 
5339
                * Makefile.in (sibcall.o): Kill.
5340
                (tree-tailcall.o): Add except.h dependency
5341
                * sibcall.c: Kill.
5342
                (purge_reg_equiv_notes, purge_mem_unchanging_flag): Move to ...
5343
                * calls.c (purge_reg_equiv_notes,
5344
                purge_mem_unchanging_flag) ... here.
5345
                (expand_call): Do not produce placeholders; do
5346
                not deal with tail recursion; update
5347
                equivalencies after sibcall production.
5348
                * toplev.c (rest_of_handle_sibling_calls): Kill.
5349
                (rest_of_compialtion): Do not use rest_of_handle_sibling_calls.
5350
                * tree-dump.c (dump_files): Add tail2
5351
                * tree-flow.h (tree_optimize_tail_calls): Update prototype.
5352
                * tree-optimize.c (optimize_function_tree): Do
5353
                tail optimization twice.
5354
                * tree-tailcall.c: Inlucde except.h
5355
                (suitable_for_tail_call_opt_p): New.
5356
                (optimize_tail_call): Add opt_tailcalls argument;
5357
                optimize tailcalls.
5358
                (tree_optimize_tail_calls): Add opt_tailcalls/pass arguments.
5359
                * tree.h (CALL_EXPR_TAILCALL): New.
5360
                (tree_dump_index): Add tail2
5361
 
5362
2003-11-18  Jan Hubicka  
5363
 
5364
        * tree-cfg.c (cfg_remove_useless_stmts_bb): Avoid crash.
5365
        * tree-dfa.c (get_expr_operands): Fix handling of CALL_EXPR.
5366
 
5367
2003-11-18  Diego Novillo  
5368
 
5369
        * tree-optimize.c (optimize_function_tree): Disable tail
5370
        call optimizations.
5371
 
5372
2003-11-18  Jan Hubicka  
5373
 
5374
        * Makefile.in (sibcall.o): Kill.
5375
        (tree-tailcall.o): Add except.h dependency
5376
        * sibcall.c: Kill.
5377
        (purge_reg_equiv_notes, purge_mem_unchanging_flag): Move to ...
5378
        * calls.c (purge_reg_equiv_notes, purge_mem_unchanging_flag) ... here.
5379
        (expand_call): Do not produce placeholders; do not deal with tail
5380
        recursion; update equivalencies after sibcall production.
5381
        * toplev.c (rest_of_handle_sibling_calls): Kill.
5382
        (rest_of_compialtion): Do not use rest_of_handle_sibling_calls.
5383
        * tree-dump.c (dump_files): Add tail2
5384
        * tree-flow.h (tree_optimize_tail_calls): Update prototype.
5385
        * tree-optimize.c (optimize_function_tree): Do tail optimization twice.
5386
        * tree-tailcall.c: Inlucde except.h
5387
        (suitable_for_tail_call_opt_p): New.
5388
        (optimize_tail_call): Add opt_tailcalls argument; optimize tailcalls.
5389
        (tree_optimize_tail_calls): Add opt_tailcalls/pass arguments.
5390
        * tree.h (CALL_EXPR_TAILCALL): New.
5391
        (tree_dump_index): Add tail2
5392
 
5393
2003-11-18  Jeff Law  
5394
 
5395
        * tree-ssa-dom.c (thread_across_edge): Lose block_avail_exprs argument.
5396
        Callers updated.  Pass NULL for block_avail_exprs in call to
5397
        lookup_avail_expr.  Record both the condition and the inverted
5398
        condition when threading across an edge.
5399
 
5400
2003-11-18  Richard Henderson  
5401
 
5402
        * tree-ssa.c (tree_ssa_useless_type_conversion): Use TYPE_MAIN_VARIANT
5403
        when compariing pointer types too.
5404
 
5405
2003-11-18  Jan Hubicka  
5406
 
5407
        * tree-dump.c (dump_files): Reorder tail calls.
5408
        * tree-optimize.c (optimize_function_tree): Likewise
5409
        * tree-tailcall.c (optimize_tail_call, eliminate_tail_call): Remove
5410
        variable tmpvars; update SSA.
5411
        (suitable_for_tail_opt_p): Do not give up because of static variables.
5412
        (find_tail_calls):  Track return values in SSA graph.
5413
        * tree.c (make-phi_node): Do not create new SSA name when operand
5414
        already is.
5415
        * tree.h (enum tree_dump_index): Reorder tail call.
5416
 
5417
2003-11-17  Diego Novillo  
5418
 
5419
        * gimplify.c (gimplify_call_expr): Change gimple_test_f argument to
5420
        return bool type.
5421
        (mark_decls_volatile_r): New local function.
5422
        (gimplify_expr): Make gimple_test_f return bool type.
5423
        Call mark_decls_volatile_r when gimplifying VA_ARG_EXPR.
5424
        * tree-dfa.c (struct walk_state): Remove field is_va_arg_expr.
5425
        Update all callers.
5426
        (opf_force_vop): Remove.  Update all users.
5427
        (add_stmt_operand): Re-structure to add real operands only for
5428
        GIMPLE register variables.
5429
        (find_vars_r): Don't handle VA_ARG_EXPR nodes.
5430
        (add_referenced_var): Also assign a UID to variables with hidden
5431
        uses.
5432
        Call is_gimple_call_clobbered to determine if a variable is call
5433
        clobbered.
5434
        (get_memory_tag_for): Mark memory tags volatile and static.
5435
        * tree-flow.h (struct var_ann_d): Remove field is_in_va_arg_expr.
5436
        Update all users.
5437
        * tree-simple.c (is_gimple_*): Change return type to bool.  Update
5438
        all users.
5439
        (is_gimple_reg_type): Return true only for non aggregate types.
5440
        (is_gimple_non_addressable_1): New local function.
5441
        (is_gimple_reg): Call it.
5442
        (is_gimple_non_addressable): New function.
5443
        (is_gimple_call_clobbered): New function.
5444
        * tree-simple.h (is_gimple_*): Change return type to bool.
5445
 
5446
2003-11-17  Jason Merrill  
5447
 
5448
        PR c++/11266
5449
        * gimplify.c (gimple_add_tmp_var): Also make sure
5450
        seen_in_bind_expr isn't set.
5451
        (mostly_copy_tree_r): Don't copy a TARGET_EXPR.
5452
        (gimplify_target_expr): Only expand a TARGET_EXPR the first time
5453
        we see it.
5454
 
5455
2003-11-17  Richard Henderson  
5456
 
5457
        * tree-pretty-print.c (dump_generic_node): Use %u not %x for
5458
        printing DECL_UID.
5459
 
5460
2003-11-16  Richard Henderson  
5461
 
5462
        * c-common.c (c_add_case_label): Use create_artificial_label.
5463
        * tree-simple.h (create_artificial_label): Move decl ...
5464
        * tree.h: ... here.
5465
 
5466
2003-11-16  Richard Henderson  
5467
 
5468
        PR c++/12770
5469
        * gimple-low.c (lower_stmt_body): Take a tree, not a tree*.
5470
        (lower_stmt): Handle EH nodes.
5471
        (lower_bind_expr): Remove fixme.
5472
        (block_may_fallthru): Move from tree-eh.c.  Handle COND_EXPR,
5473
        BIND_EXPR, and TRY_FINALLY_EXPR.
5474
        (lower_cond_expr): Use it.
5475
        * tree-eh.c (collect_finally_tree): Ignore COND_EXPR and BIND_EXPR.
5476
        (replace_goto_queue_cond_clause): New.
5477
        (replace_goto_queue_1): Use it.  Split out statement_list handling.
5478
        (replace_goto_queue_stmt_list): New.
5479
        (-block_may_fallthru): Move to gimple-low.c.
5480
        (lower_eh_constructs_1): Ignore BIND_EXPR.
5481
        * tree-flow.h (block_may_fallthru): Declare.
5482
 
5483
        * tree-dump.c (dump_files): Exchange .eh and .lower passes.
5484
        * tree-optimize.c (tree_rest_of_compilation): Likewise.
5485
        * tree.h (enum tree_dump_index): Likewise.
5486
 
5487
2003-11-16  Jason Merrill  
5488
 
5489
        * gimplify.c (mostly_copy_tree_r): Don't walk into a BLOCK.
5490
 
5491
        * tree-inline.c (walk_tree): Don't walk into the BIND_EXPR_VARS
5492
        of a BIND_EXPR.
5493
        * c-common.c (c_walk_subtrees): Don't walk into the decl of a
5494
        DECL_STMT.
5495
 
5496
        PR optimization/11269
5497
        * dwarf2out.c (gen_subprogram_die): Generate a DIE for a named
5498
        return value.
5499
        (loc_descriptor_from_tree): Treat RESULT_DECL like VAR_DECL.
5500
        (add_location_or_const_value_attribute): Likewise.
5501
        (add_bound_info): Likewise.
5502
        (gen_decl_die): Likewise.
5503
 
5504
2003-11-16  Jason Merrill  
5505
 
5506
        * c-pretty-print.c (debug_c_tree): Restore removed fn.
5507
        * diagnostic.h: Declare it.
5508
 
5509
        * tree-pretty-print.c (dump_generic_node): Use DECL_UID when
5510
        dumping anonymous decls.
5511
 
5512
2003-11-16  Richard Henderson  
5513
 
5514
        * tree-cfg.c (last_and_only_stmt): New.
5515
        * tree-flow.h (last_and_only_stmt): Declare.
5516
        * tree-ssa-dom.c (thread_across_edge): Use it.
5517
 
5518
        * tree-cfg.c (tree_block_forwards_to): Don't check for empty stmts.
5519
        (tree_forwarder_block_p): Likewise.
5520
        * tree-dfa.c (get_stmt_operands): Likewise.
5521
        * tree-ssa-ccp.c (set_rhs): Likewise.
5522
        * tree-ssa-dom.c (optimize_stmt): Likewise.
5523
        * tree-ssa.c (rewrite_stmt): Likewise.
5524
 
5525
2003-11-16  Richard Henderson  
5526
 
5527
        * tree.h (LABEL_DECL_UID): Rename from LABEL_DECL_INDEX.
5528
        * tree-flow.h (bsi_remove): Declare.
5529
        * tree-flow-inline.h (bsi_remove): Move ...
5530
        * tree-cfg.c (set_bb_for_stmt): Don't re-set LABEL_DECL_UID.
5531
        Verify that a label isn't already in a block before adding it.
5532
        (bsi_remove): Move from tree-flow-inline.h, clear bb.
5533
        * tree-pretty-print.c (dump_generic_node): Use LABEL_DECL_UID if set.
5534
 
5535
2003-11-15  Richard Henderson  
5536
 
5537
        * function.c (clear_block_marks): Rename from reorder_blocks_0, export.
5538
        * function.h (clear_block_marks): Declare.
5539
        * gimple-low.c (lower_function_body): Use it.
5540
        (lower_bind_expr): Ensure we don't link blocks into the tree twice.
5541
        * gimplify.c (gimplify_body): Keep old bind_expr at top level if
5542
        possible.
5543
 
5544
2003-11-14  Richard Henderson  
5545
 
5546
        * tree-ssa-pre.c (split_critical_edges): Reimplement.  Call
5547
        tree_split_edge directly.
5548
 
5549
2003-11-14  Jason Merrill  
5550
 
5551
        * tree-eh.c (do_return_redirection): Assign directly to the
5552
        RESULT_DECL of a function which returns in memory.
5553
 
5554
2003-11-14  Daniel Berlin  
5555
 
5556
        * tree-ssa-pre.c (pre_stats): Add ephis_current member.
5557
        (create_ephi_node): Use xmalloc, not ggc_alloc_tree.
5558
        (clear_all_eref_arrays): Free the ephis here.
5559
        (expr_phi_insertion): Don't append the ephis to the erefs array.
5560
        (insert_occ_in_preorder_dt_order): Move building/freeing of dfn
5561
        array so that it only occurs once per function..
5562
        (rename_1): Ditto on the dfs_id array.
5563
        (ephi_use_pool): New alloc pool.
5564
        (add_ephi_use): Pool allocate these things, rather than
5565
        ggc_alloc'ing them.
5566
        (insert_euse_in_preorder_dt_order_1): Use ephi_at_block to put the
5567
        ephi in the list.
5568
        (pre_expression): Don't PRE when we only have 1 occurrence.
5569
        (expr_lexically_eq): Make inline.
5570
        (names_match_p): Move closer to first use.
5571
        (tree_perform_ssapre): Alloc and free the ephi_use_pool.
5572
        Make stat printing per-expression.
5573
        Add checking that we freed all ephis.
5574
 
5575
2003-11-14  Andrew MacLeod  
5576
 
5577
        * common.opt (ftree-ter): Document new option.
5578
        * flags.h (flag_tree_ter): Add new flag.
5579
        * fold-const.c (invert_truthvalue): Don't ignore cast to BOOLEAN_TYPE.
5580
        * opts.c (decode_options): Option -ftree-ter defaults to on.
5581
        (common_handle_option): Add processing for flag_tree_ter.
5582
        * toplev.c (flag_tree_ter): Initialize to 0.
5583
        (lang_independent_options f_): Add -ftree-ter flag.
5584
        * tree-ssa-live.c (init_var_map): Initialize ref_count to 0.
5585
        (delete_var_map): Free ref count if allocated.
5586
        (register_ssa_partition): Add "is_use" parameter for reference counting.
5587
        (create_ssa_var_map): Add flag and code for calculating ref counts.
5588
        * tree-ssa-live.h (struct _var_map): Add ref_count field.
5589
        (SSA_VAR_MAP_REF_COUNT): Define flag.
5590
        (version_ref_count): Function to retreive ref_count.
5591
        * tree-ssa.c (replace_variable): If an expression vector is passed in,
5592
        use replacement expression instead of mapped variable when available.
5593
        (struct value_expr_d): New structure for value lists.
5594
        (struct temp_expr_table_d): Structure used to build an expression
5595
        replacement table.
5596
        (new_temp_expr_table): New. Create a new TER (Temporary Expression
5597
        Replacement) table.
5598
        (free_temp_expr_table): New. Free a TER table.
5599
        (new_value_expr): New. Allocate a value list element.
5600
        (free_value_expr): New. Free a value list element.
5601
        (find_value_in_list): New. Find a value in a list.
5602
        (add_value_to_list): New. Add a value to a list if not already present.
5603
        (remove_value_from_list): New. Remove a value from a list.
5604
        (add_dependance): New. Add a dependency to an expression.
5605
        (check_replaceable): New. Check if a stmt is a candidate for TER. Add
5606
        to active list and create dependancies if so.
5607
        (finish_expr): New. Remove an expression from TER consideration.
5608
        (mark_replaceable): New. Finish a TER expression as a valid replacement.
5609
        (kill_expr): New. Finish dependent TER expressions as not replaceable.
5610
        (kill_virtual_exprs): New. Finish any TER expressions dependent on a
5611
        virtual operand as not replaceable.
5612
        (find_replaceable_in_bb): New. Process a basic block for TER expression.
5613
        (find_replaceable_exprs): New. Entry point for TER expression finder.
5614
        (dump_replaceable_exprs): New. output list of replaceable expressions.
5615
        (rewrite_out_of_ssa): Build TER table if requested, and use it.
5616
 
5617
2003-11-14  Andreas Jaeger  
5618
 
5619
        * c-semantics.c (find_reachable_label): Use C90 function
5620
        declaration.
5621
 
5622
2003-11-14  Jason Merrill  
5623
 
5624
        PR middle-end/12526
5625
        * tree-cfg.c (call_expr_flags): Move to calls.c.
5626
        * tree-flow.h: Move prototype to tree.h.
5627
 
5628
        PR c++/13033
5629
        * c-simplify.c (gimplify_c_loop): Wrap the increment in a
5630
        CLEANUP_POINT_EXPR.
5631
 
5632
        * tree-dfa.c (get_stmt_operands) : A memory clobber
5633
        clobbers all call-clobbered variables.   Clobber clobber.
5634
 
5635
        * gimplify.c (canonicalize_component_ref): Remove redundant call
5636
        to recalculate_side_effects.
5637
 
5638
2003-11-14  Richard Henderson  
5639
 
5640
        PR c++/12751
5641
        * tree-eh.c (struct leh_tf_state): Add outer.
5642
        (lower_try_finally, lower_cleanup): Set it.
5643
        (lower_try_finally_fallthru_label): New.
5644
        (honor_protect_cleanup_actions): Use it.
5645
        (lower_try_finally_copy, lower_try_finally_switch): Likewise.
5646
 
5647
        * tree-eh.c (collect_finally_tree): Complete manual tailrecurse
5648
        transformation.
5649
 
5650
2003-11-14  Richard Henderson  
5651
 
5652
        * gimplify.c (voidify_wrapper_expr): Don't clobber TREE_TYPE of
5653
        statements in a STATEMENT_LIST.  Be prepared for an empty list.
5654
 
5655
2003-11-14  Steven Bosscher  
5656
 
5657
        * jump.c (never_reached_warning): Remove function.
5658
        * rtl.h (never_reached_warning): Don't declare it.
5659
        * cfgrtl.c (never_reached_warning): Don't call it.
5660
        * cse.c (never_reached_warning): Ditto.
5661
 
5662
2003-11-13  Jeff Law  
5663
 
5664
        * tree-cfg.c (bsi_replace): Restore accidentally removed code.
5665
 
5666
        * tree-cfg.c (cfg_remove_useless_stmts_bb): Also detect useless
5667
        var->var copies created by the out-of-ssa translation.
5668
 
5669
2003-11-13  Steven Bosscher  
5670
 
5671
        PR middle-end/11514
5672
        * tree-inline.c (walk_tree): Handle PLACEHOLDER_EXPR.
5673
 
5674
2003-11-13  Richard Henderson  
5675
 
5676
        * tree-cfg.c (cfg_remove_useless_stmts_bb): Initialize stmt.
5677
 
5678
2003-11-13  Jan Hubicka  
5679
 
5680
        * calls.c (special_function_p): Do not check for ECF_MALLOC.
5681
        (flags_from_decl_or_type):  Use special_function_p.
5682
        (expand_call): Remove call to special_function_p.
5683
        * tree-cfg.c (notice_special_calls, clear_special_calls): New functions.
5684
        (remove_useless_stmts): Use clear_special_calls.
5685
        (remove_useless_stmts_1): Use notice_special_calls.
5686
        * tree-flow.h (notice_special_calls, clear_special_calls): New functions.
5687
        * tree-ssa-dce.c (remove_dead_stmts): Use clear_special_calls and
5688
        notice_special_calls..
5689
 
5690
        * gimplify.c (gimplify_expr): Check labels.
5691
 
5692
        * tree-cfg.c (tree_verify_flow_info): Check labels.
5693
 
5694
        * tree-cfg.c (make_exit_edges): Do not create edges for const
5695
        functions.
5696
        (update_call_expr_flags): Fix.
5697
 
5698
2003-11-12  Diego Novillo  
5699
 
5700
        (declare_inlined_vars): New local function.
5701
        (initialize_inlined_parameters): Call it.
5702
        (expand_call_inline): Call it.
5703
 
5704
2003-11-13  Steven Bosscher  
5705
 
5706
        PR optimization/12640
5707
        * tree-ssa-ccp.c (get_strlen): Don't follow the UD chain
5708
        of a PHI argument if the DEF stmt for the argument is
5709
        the PHI itself.
5710
 
5711
2003-11-12  Zdenek Dvorak  
5712
            Jeff Law  
5713
 
5714
        * tree-cfg.c (cfg_remove_useless_stmts): New function.
5715
        (cfg_remove_useless_stmts_bb): Likewise.
5716
        * tree-flow.h (cfg_remove_useless_stmts): Prototype.
5717
        * tree-ssa.c (rewrite_out_of_ssa): Use cfg_remove_useless_stmts
5718
        instead of remove_useless_stmts.
5719
 
5720
2003-11-12  Richard Henderson  
5721
 
5722
        * Makefile.in (OBJS-common): Add tree-iterator.o.
5723
        (expr.o): Depend on tree-iterator.h.
5724
        (GTFILES): Add tree-iterator.c.
5725
        * basic-block.h (struct basic_block_def): Replace head_tree_p
5726
        and end_tree_p with stmt_list.
5727
        (tree_bb_root): New.
5728
        (create_bb): Don't declare.
5729
        * c-common.c (c_warn_unused_result): Handle STATEMENT_LIST.
5730
        * c-simplify.c (c_gimplify_stmt): Don't rationalize_compound_expr.
5731
        * cfg.c (entry_exit_blocks): Adjust for member changes.
5732
        (compact_blocks): Manage tree_bb_root.
5733
        * expr.c (expand_expr_1): Handle STATEMENT_LIST.
5734
        * gimple-low.c: Update for tree_stmt_iterator changes.
5735
        (lower_cond_expr): Use expr_only.  Notice empty conditionals.
5736
        * gimplify.c (append_to_statement_list_1): Create and
5737
        manage statement_list nodes.
5738
        (foreach_stmt): Remove.
5739
        (wfl_locus): Remove.
5740
        (annotate_all_with_locus_1): Merge into...
5741
        (annotate_all_with_locus): ... here.  Iterate over the
5742
        statement list directly.
5743
        (voidify_wrapper_expr): Handle STATEMENT_LIST.
5744
        (gimplify_return_expr): Likewise.
5745
        (gimplify_loop_expr): Likewise.
5746
        (shortcut_cond_r, shortcut_cond_expr): Likewise.
5747
        (gimplify_cleanup_point_expr): Likewise.
5748
        (gimple_build_eh_filter): Create statement list bodies.
5749
        (gimplify_bind_expr): Likewise.
5750
        (gimplify_switch_expr): Likewise.
5751
        (gimplify_cond_expr): Likewise.
5752
        (gimplify_compound_expr): Handle void expressions as well.
5753
        (gimplify_statement_list): New.
5754
        (gimple_push_cleanup): Gimplify the WITH_CLEANUP_EXPR operand.
5755
        (gimplify_stmt): Ensure non-null result.
5756
        (gimplify_to_stmt_list): New.
5757
        (gimplify_expr): Use gimplify_compound_expr, gimplify_statement_list,
5758
        gimplify_to_stmt_list as appropriate.
5759
        (gimplify_body): Fix creation of outer BIND_EXPR.
5760
        * tree-cfg.c (tree_bb_root): New.
5761
        (build_tree_cfg): Initialize it.  Update for make_blocks changes.
5762
        (factor_computed_gotos): Use create_bb directly.
5763
        (make_blocks): Rewrite to use statement lists.
5764
        (append_stmt_to_bb, prepend_stmt_to_bb): Remove.
5765
        (create_bb): Make static.  Add stmt_list argument.  Don't allow
5766
        null after argument.  Set tree_bb_root.
5767
        (make_edges): ENTRY block successor is FALLTHRU.
5768
        (remove_useless_stmts_warn_notreached): Handle STATEMENT_LIST.
5769
        (struct rus_data): Add last_goto.
5770
        (remove_useless_stmts_cond): Clear it.  Zap empty conditionals.
5771
        Use expr_only for simple statment elimination.
5772
        (remove_useless_stmts_tf): Clear last_goto.  Use TREE_SIDE_EFFECTS
5773
        instead of IS_EMPTY_STMT.  Use append_to_statement_list instead of
5774
        munging to COMPOUND_EXPR.
5775
        (remove_useless_stmts_tc): Clear last_goto.  Use TREE_SIDE_EFFECTS.
5776
        (remove_useless_stmts_goto): Set last_goto.
5777
        (remove_useless_stmts_label): New.  Kill goto-next-label.
5778
        (remove_useless_stmts_1): Reorg to handle STATEMENT_LIST.
5779
        (remove_bb): Simplify block removal.
5780
        (remove_bsi_from_block): Kill.
5781
        (tree_block_forwards_to): Tidy bsi loops.  Do not create
5782
        block label here.
5783
        (tree_cfg2dot): Update for bb->stmt_list.
5784
        (delete_tree_cfg): Clear tree_bb_root.
5785
        (set_bb_for_stmt): Handle STATEMENT_LISTs.
5786
        (bsi_insert_before, bsi_insert_after): Re-implement on TSIs.
5787
        (bsi_move_after, bsi_move_before, bsi_move_to_bb_end): Likewise.
5788
        (bsi_replace): Likewise.
5789
        (tree_find_edge_insert_loc): New, split from ...
5790
        (bsi_insert_on_edge_immediate): ... here.
5791
        (bsi_commit_edge_inserts): Use it.  Add all stmts at once.
5792
        (bsi_insert_on_edge): Use statement lists.
5793
        (tree_split_edge): Position new block correctly.  Deal with
5794
        fallthrough to EXIT.
5795
        (tree_verify_flow_info): Do not check block order vs statement chain.
5796
        (tree_make_forwarder_block): Update create_bb call, fix edge flags.
5797
        (thread_jumps): Call tree_redirect_edge_and_branch directly.
5798
        (tree_block_label): Don't return a NONLOCAL_LABEL.
5799
        (tree_redirect_edge_and_branch_1): Rename from s/_1//.  Take an
5800
        argument to use ssa_redirect_edge or redirect_edge_succ.  Use
5801
        tree_split_edge instead of bsi_insert_on_edge_immediate.
5802
        (tree_redirect_edge_and_branch): New.
5803
        (remove_stmt, first_exec_stmt, bsi_init, bsi_next_in_bb): Kill.
5804
        (bsi_start, bsi_last, bsi_prev, bsi_from_tsi): Kill.
5805
        (bsi_update_from_tsi, bsi_link_after): Kill.
5806
        * tree-eh.c (collect_finally_tree): Handle STATEMENT_LIST.
5807
        (replace_goto_queue_1): Likewise.
5808
        (replace_goto_queue): Don't use walk_tree.
5809
        (do_return_redirection): Create statement lists.
5810
        (do_goto_redirection): Likewise.
5811
        (block_may_fallthru_last): Fold into...
5812
        (block_may_fallthru): ... here.
5813
        (frob_into_branch_around): Use append_to_statement_list.
5814
        (honor_protect_cleanup_actions): Likewise.
5815
        (lower_try_finally_nofallthru): Likewise.
5816
        (lower_try_finally_onedest): Likewise.
5817
        (lower_try_finally_copy): Likewise.
5818
        (lower_try_finally_switch): Likewise.
5819
        (lower_try_finally): Likewise.
5820
        (lower_catch): Likewise.
5821
        (lower_eh_filter): Likewise.
5822
        (lower_eh_constructs_1): Handle STATEMENT_LIST.
5823
        * tree-flow-inline.h (BSI_NUM_ELEMENTS, bsi_list_p): Remove.
5824
        (new_bsi_list, empty_bsi_stack, FOR_EACH_BSI_IN_REVERSE): Remove.
5825
        (FOR_EACH_STMT_IN_REVERSE): Remove.
5826
        (bsi_start, bsi_last, bsi_end_p): Re-implement based on TSIs.
5827
        (bsi_next, bsi_prev, bsi_stmt, bsi_stmt_ptr, bsi_remove): Likewise.
5828
        * tree-flow.h (block_stmt_iterator): Likewise.
5829
        * tree-inline.c (copy_statement_list): New.
5830
        (copy_body_r): Use it, and append_to_statement_list.
5831
        (initialize_inlined_parameters): Use append_to_statement_list.
5832
        (expand_call_inline): Likewise.
5833
        (gimple_expand_calls_inline): New.
5834
        (expand_calls_inline): Use it.
5835
        (walk_tree, unsave_r): Handle STATEMENT_LIST.
5836
        (add_stmt_to_compound): Remove.
5837
        * tree-iterator.c: New file.
5838
        * tree-iterator.h: Re-implement based on STATEMENT_LIST.
5839
        * tree-mudflap.c (mf_decl_cache_locals): Don't
5840
        rationalize_compound_expr.
5841
        * tree-optimize.c (optimize_function_tree): Make static.
5842
        Rechain statements from blocks before deleting the cfg.
5843
        * tree-pretty-print.c (dump_generic_node): Handle STATEMENT_LIST,
5844
        update for change in tree_stmt_iterator wrt COMPOUND_EXPR.
5845
        (dump_generic_node): Dump lowered COND_EXPR on a single line.
5846
        * tree-simple.c (is_gimple_stmt): Handle STATEMENT_LIST.
5847
        * tree-simple.h (foreach_stmt_fn, foreach_stmt): Remove.
5848
        (gimplify_to_stmt_list): Declare.
5849
        (alloc_stmt_list, free_stmt_list): Declare.
5850
        * tree-ssa-dce.c (should_remove_dead_stmt): Rename from
5851
        remove_dead_stmt; return bool if statement should be removed.
5852
        (remove_dead_stmts): Update to match.
5853
        * tree-ssa-live.c (build_tree_conflict_graph): Don't use
5854
        FOR_EACH_STMT_IN_REVERSE.
5855
        * tree-ssa-pre.c (reaching_def): Tidy BSI usage.
5856
        (insert_one_operand, collect_expressions): Likewise.
5857
        * tree.c (tree_size): Handle STATEMENT_LIST.
5858
        (copy_node): Abort on STATEMENT_LIST.
5859
        (expr_first, expr_last): Move to tree-iterator.c.
5860
        (expr_length): Remove.
5861
        (tree_node_structure): Handle STATEMENT_LIST.
5862
        (tsi_link_before, tsi_link_after, tsi_delink): Move to tree-iterator.c.
5863
        (tsi_link_chain_before, tsi_link_chain_after): Merge into non-chain.
5864
        (tsi_new_stmt_list, tsi_stmt_list_head, body_is_empty): Kill.
5865
        * tree.def (STATEMENT_LIST): New.
5866
        * tree.h (STATEMENT_LIST_HEAD, STATEMENT_LIST_TAIL): New.
5867
        (struct tree_statement_list_node): New.
5868
        (struct tree_statement_list): New.
5869
        (enum tree_node_structure_enum): Add TS_STATEMENT_LIST.
5870
        (union tree_node): Add stmt_list.
5871
        (expr_length): Remove.
5872
        (expr_only): New.
5873
        (add_to_compound_expr, body_is_empty): Remove.
5874
        (optimize_function_tree): Remove.
5875
 
5876
2003-11-12  Zdenek Dvorak  
5877
 
5878
        * tree-flow.h (remove_useless_vars): Declare.
5879
        (expand_var_p): Declaration removed.
5880
        * tree-ssa.c (rewrite_out_of_ssa): Call remove_useless_vars.
5881
        * tree-cfg.c (dump_function_to_file): Update dumping of variables.
5882
        * gimple-low.c (expand_var_p): Made static.
5883
        (remove_useless_vars): New.
5884
        (expand_used_vars): Expand all variables in the
5885
        cfun->unexpanded_var_list.
5886
 
5887
2003-11-11  Richard Henderson  
5888
 
5889
        * c-common.c (c_gimplify_stmt): Fix botched removal of
5890
        rationalize_compound_expr calls.
5891
 
5892
        * c-semantics.c (build_stmt): Set TREE_SIDE_EFFECTS.
5893
        * c-simplify.c (c_gimplify_stmt): Return a gimplify_status;
5894
        mind the status from subroutines to avoid re-gimplification.
5895
        (c_build_bind_expr): Do not call gimplify_stmt.
5896
        (gimplify_c_loop): Don't create a loop_expr; fully gimplify.
5897
        (gimplify_block, gimplify_cleanup, gimplify_expr_stmt,
5898
        gimplify_for_stmt, gimplify_while_stmt, gimplify_do_stmt,
5899
        gimplify_if_stmt, gimplify_switch_stmt, gimplify_return_stmt,
5900
        gimplify_decl_stmt, gimplify_compound_literal_expr,
5901
        gimplify_stmt_expr): Return a gimplify_status.  In most cases,
5902
        don't do local gimplification of sub-structures.
5903
        (gimplify_decl_stmt): Use append_to_compound_expr when we care
5904
        about the result value.
5905
        (gimplify_stmt_expr): Use append_to_statement_list_force and
5906
        re-gimplify so that voidify_wrapper_expr can work.
5907
        (finish_bc_block): Don't append to a non-list.
5908
        (c_gimplify_expr): Pass back the gimplify_status of subroutines.
5909
        * c-common.h (c_gimplify_stmt): Update decl.
5910
        * gimplify.c (append_to_statement_list_1): Make sure list_p is
5911
        never null after call.
5912
        (append_to_compound_expr): New.
5913
        * tree-simple.h (append_to_compound_expr): Declare.
5914
 
5915
2003-11-11  Richard Henderson  
5916
 
5917
        * gimplify.c (gimplify_addr_expr): Clear, not copy, TREE_SIDE_EFFECTS.
5918
 
5919
2003-11-11  Richard Henderson  
5920
 
5921
        PR c/13014
5922
        * c-simplify.c (gimplify_if_stmt): Remove short circuit.
5923
        * tree-cfg.c (struct rus_data): Add has_label.
5924
        (remove_useless_stmts_warn_notreached): New.
5925
        (remove_useless_stmts_cond): Warn for deleted conditionals.
5926
        (remove_useless_stmts_tc): Warn for deleted catches.
5927
        (remove_useless_stmts_1): Set has_label.
5928
 
5929
2003-11-11  Jan Hubicka  
5930
 
5931
        * gimplify.c (gimplify_call_expr):  Unset side effects for
5932
        pure functions too.
5933
        * tree-cfg.c (update-call_expr_flags): New function.
5934
        (remove_useless_stmts_and_vars_1): Use it.
5935
        (is_ctrl_altering_stmt):  Pure/const calls never alter the CFG.
5936
        * tree-ssa-dce.c (stmt_useful_p): Check side effects flag
5937
        on call exprs.
5938
 
5939
2003-11-11  Jan Hubicka  
5940
 
5941
        * tree-cfg.c (has_label_p): New function.
5942
        (tree_verify_flow_info): New checks.
5943
        * tree-optimize.c (optimize_function_tree): Call verify_flow_info
5944
        before de-SSA.
5945
 
5946
2003-11-11  Richard Henderson  
5947
 
5948
        * tree-cfg.c (struct rus_data): Rename from rusv_data.
5949
        Remove remove_unused_vars.
5950
        (remove_useless_stmts*): Rename from remove_useless_stmts_and_vars*.
5951
        (remove_useless_stmts_bind): Do not remove dead variables.
5952
        (remove_useless_stmts): Kill remove_unused_vars argument.
5953
        * tree-flow.h (remove_useless_stmts): Update.
5954
        * tree-optimize.c (tree_rest_of_compilation): Update call.
5955
        * tree-ssa.c (rewrite_out_of_ssa): Likewise.
5956
 
5957
2003-11-11  Zdenek Dvorak  
5958
            Diego Novillo  
5959
 
5960
        * basic-block.h (brief_dump_cfg): Declare.
5961
        * cfg.c (dump_cfg_bb_info, brief_dump_cfg): New.
5962
        * diagnostic.h (dump_generic_node): Declaration changed.
5963
        (print_generic_stmt_indented): Declare.
5964
        * gimple-low.c (expand_var_p): New.
5965
        (expand_used_vars): Use it.
5966
        * tree-cfg.c (struct cfg_stats_d): Remove num_failed_bind_expr_merges
5967
        field.
5968
        (remove_bb): Only dump whole block with TDF_DETAILS.
5969
        (tree_dump_bb): Use dump_generic_bb.
5970
        (dump_tree_cfg): Use brief_dump_cfg and dump_function_to_file.
5971
        (dump_cfg_function_to_file): Merged into dump_function_to_file,
5972
        removed.
5973
        (dump_cfg_stats): Do not dump cfg_stats.num_failed_bind_expr_merges.
5974
        (dump_function_to_file): Moved from tree-dump.c, merged with
5975
        dump_cfg_function_to_file.
5976
        * tree-dump.c (dump_function_to_file): Removed.
5977
        * tree-flow.h (dump_cfg_function_to_file): Declaration removed.
5978
        (dump_generic_bb, expand_var_p): Declare.
5979
        * tree-must-alias.c (tree_compute_must_alias): Replace
5980
        dump_cfg_function_to_file by dump_function_to_file.
5981
        * tree-ssa-ccp.c (tree_ssa_ccp): Ditto.
5982
        * tree-ssa-copyprop.c (tree_ssa_copyprop): Ditto.
5983
        * tree-ssa-dce.c (tree_ssa_dce): Ditto.
5984
        * tree-ssa-dom.c (tree_ssa_dominator_optimize_1): Ditto.
5985
        * tree-ssa-pre.c (tree_perform_ssapre): Ditto.
5986
        * tree-ssa.c (rewrite_into_ssa, rewrite_out_of_ssa): Ditto.
5987
        * tree-tailcall.c (tree_optimize_tail_calls): Ditto.
5988
        * tree-pretty-print.c (print_declaration, print_generic_decl): Don't
5989
        use flags argument, change spacing.
5990
        (dump_block_info): Removed.
5991
        (dump_generic_bb_buff, dump_generic_bb, print_generic_stmt_indented,
5992
        dump_bb_header, dump_bb_end, dump_phi_nodes): New functions.
5993
        (dump_vops): Change spacing, don't dump phi nodes.
5994
        (do_niy, print_generic_stmt, print_generic_expr, print_declaration,
5995
        print_struct_decl, print_call_name): Add argument to
5996
        the dump_generic_node calls.
5997
        (last_bb): Removed.
5998
        (dump_generic_node): Print semicolons at end of statements correctly.
5999
        Don't print bb related stuff.
6000
        (maybe_init_pretty_print): Don't initialize last_bb.
6001
        * tree-ssa.c (rewrite_out_of_ssa): Do not allow virtual operands to
6002
        be shown in the .optimized dump.
6003
 
6004
2003-11-11  Daniel Berlin  
6005
 
6006
        PR optimization/12936
6007
        * tree-ssa-pre.c (expr_phi_insertion): Remove unused code that was
6008
        causing ICE's for VA_ARG_EXPR.
6009
 
6010
2003-11-10  Richard Henderson  
6011
 
6012
        * gimple-low.c (lower_function_body): Lower bind_expr in place.
6013
        (lower_stmt): Only incr for stmts we're skipping.
6014
        (lower_cond_expr): Detect empty if.
6015
 
6016
2003-11-10  Steven Bosscher  
6017
 
6018
        * toplev.c (rest_of_decl_compilation): Use the location of the
6019
        declaration for error messages.
6020
 
6021
2003-11-10  Richard Henderson  
6022
 
6023
        * gimplify.c (add_stmt_to_compound, add_tree): Remove.
6024
        (append_to_statement_list_1, append_to_statement_list): New.
6025
        (append_to_statement_list_force): New.
6026
        (gimplify_loop_expr): Take pre_p.
6027
        (gimplify_expr): Provide it.
6028
        * tree-simple.h: Update.
6029
 
6030
        * c-simplify.c: Replace add_tree with append_to_statement_list.
6031
        * gimplify.c, tree-mudflap.c: Likewise.
6032
 
6033
2003-11-10  Richard Henderson  
6034
 
6035
        * c-common.c (c_warn_unused_result): Restructure to use iterator
6036
        on COMPOUND_EXPR only.
6037
 
6038
2003-11-09  Zdenek Dvorak  
6039
 
6040
        * tree-cfg.c (tree_verify_flow_info): Fix checking of order of basic
6041
        blocks over code.
6042
 
6043
2003-11-09  Richard Henderson  
6044
 
6045
        * basic-block.h (struct edge_def): Turn insns into a union.
6046
        * cfgrtl.c (insert_insn_on_edge): Update to match.
6047
        (commit_one_edge_insertion, commit_edge_insertions): Likewise.
6048
        (commit_edge_insertions_watch_calls): Likewise.
6049
        * gcse.c (reg_killed_on_edge, bypass_block): Likewise.
6050
        * profile.c (instrument_edges): Likewise.
6051
        * rtlanal.c (hoist_insn_to_edge): Likewise.
6052
        * tree-cfg.c (PENDING_STMT): Likewise.
6053
        (SET_PENDING_STMT): Remove.
6054
        (bsi_commit_edge_inserts): Update to match.
6055
 
6056
2003-11-08  Jan Hubicka  
6057
 
6058
        * fold.c (nondestructive_fold_binary_to_constant): Fix typo.
6059
        * fold-const.c (fold_relational_const): Check for side effects.
6060
 
6061
2003-11-07  Zdenek Dvorak  
6062
 
6063
        * basic-block.h (create_bb): Declaration changed.
6064
        * tree-cfg.c (create_bb): Enable creating a block on specified place.
6065
        (make_blocks, tree_split_edge, tree_make_forwarder_block): Use it.
6066
        (tree_verify_flow_info): Check bbs are in the correct order.
6067
 
6068
        * tree-cfg.c (find_unreachable_blocks): Remove now incorrect comments.
6069
 
6070
        * tree-ssa.c (rewrite_out_of_ssa): Don't remove annotations from
6071
        statements before the final dump.
6072
 
6073
2003-11-07  Zdenek Dvorak  
6074
 
6075
        * tree-tailcall.c (struct tailcall): New.
6076
        (bb_optimize_tail_calls, find_tail_call_p): Removed.
6077
        (eliminate_tail_call): Get the tailcall from the struct tailcall.
6078
        (optimize_tail_call, find_tail_calls): New.
6079
        (tree_optimize_tail_calls): Use them.
6080
 
6081
2003-11-07  Jan Hubicka  
6082
 
6083
        * gimple-low.c (simple_goto_p): Move to...
6084
        * tree-cfg.c: (simple_goto_p): ... here;
6085
        (nonlocal_goto_p): New.
6086
        (is_computed_goto): Rename to ...
6087
        (computed_goto_p): ... this; make global.
6088
        (factor_computed_gotos, make_blocks):  Update calls.
6089
        (make_ctrl_stmt_edges): Add edge for nonlocal labels; use new functions.
6090
        * tree-flow.h (is_coputed_goto): Kill.
6091
        (nonlocal_goto_p, simple_goto_p, computed_goto_p): Declare.
6092
        * tree-ssa-ccp (visit_stmt): Update.
6093
 
6094
2003-11-07  Jan Hubicka  
6095
 
6096
        * fold-const.c (tree_expr_nonzero_p): Fix typo.
6097
 
6098
        * fold-const.c (tree_expr_nonzero_p): New function.
6099
        (fold_relational_const): Use it.
6100
        (nondestructive_fold_binary_to_constant): Allow casts in address
6101
        expressions.
6102
 
6103
2003-11-06  Jan Hubicka  
6104
 
6105
        * tree-cfg.c (tree_block_label):  Cleanup.
6106
 
6107
2003-11-06  Daniel Berlin  
6108
 
6109
        * tree-ssa-pre.c (fast_a_dominates_b): New function.
6110
        (build_dfs_id_array_1): Ditto.
6111
        (build_dfs_id_array): Ditto.
6112
        (load_modified_phi_result): Use fast_a_dominates_b.
6113
        (rename_1): Ditto.
6114
        Also use build_dfs_id_array, and remove some duplicate ephi_at_block
6115
        calls.
6116
        (insert_occ_in_preorder_dt_order): Remove some duplicate ephi_at_block
6117
        calls.
6118
        (pre_expression): Ditto.
6119
        Also free dfs_id arrays here.
6120
        (collect_expressions): Remove duplicate bsi_stmt calls.
6121
 
6122
2003-11-06  Daniel Berlin  
6123
 
6124
        * tree-ssa-pre.c (count_stmts_in_bb): Removed.
6125
        (set_var_phis): Only call bb_for_stmt once.
6126
        (insert_one_operand): Remove endtree, endtreep, a lot of special handling
6127
        no longer needed.  Remove insert_done.
6128
        (collect_expressions): Enable INDIRECT_REF and SSA_NAME handling.
6129
 
6130
2003-11-06  Steven Bosscher  
6131
 
6132
        * tree-cfg.c (STRIP_CONTAINERS): Remove.
6133
 
6134
2003-11-06  Jan Hubicka  
6135
 
6136
        * tree-cfg.c (cleanup_cond_expr_graph):  Clean edge flags.
6137
 
6138
2003-11-06  Zdenek Dvorak  
6139
 
6140
        * tree-dump.c (dump_options): Remove TDF_LINENO from all setting.
6141
 
6142
2003-11-06  Jan Hubicka  
6143
 
6144
        * builtins.c (expand_builtin_strstr, expand_builtin_strchr,
6145
        expand_builtin_strrchr, expand_builtin_strpbrk,
6146
        simplify_builtin_strstr, simplify_builtin_strrchr,
6147
        simplify_builtin_strpbrk): Add missing casts.
6148
 
6149
2003-11-05  Zdenek Dvorak  
6150
 
6151
        * diagnostic.h (print_generic_decl): Declare.
6152
        * tree-cfg.c (dump_cfg_function_to_file): Dump variables in
6153
        unexpanded_var_list.
6154
        * tree-pretty-print.c (print_generic_decl): New function.
6155
 
6156
2003-11-05  Zdenek Dvorak  
6157
 
6158
        * Makefile.in (gimplify.o): Add function.h dependency.
6159
        * c-call-graph.c (construct_call_graph): Modify build_tree_cfg call.
6160
        * gimple-low.c (record_vars): Export.
6161
        (lower_function_body): Remove the topmost BIND_EXPR.
6162
        * gimplify.c: Include function.h.
6163
        (gimple_add_tmp_var): Record temporaries in the
6164
        cfun->unexpanded_vars_list if available.
6165
        * tree-cfg.c (build_tree_cfg): Work without the topmost BIND_EXPR.
6166
        (dump_cfg_function_to_file): New.
6167
        (dump_tree_cfg): Use dump_cfg_function_to_file.
6168
        * tree-dump.c (dump_function_to_file): Work without the topmost
6169
        BIND_EXPR.
6170
        * tree-flow.h (build_tree_cfg): Declaration changed.
6171
        (dump_cfg_function_to_file, record_vars): Declare.
6172
        * tree-optimize.c (optimize_function_tree, tree_rest_of_compilation):
6173
        Work without the topmost BIND_EXPR.
6174
        * tree-must-alias.c (tree_compute_must_alias): Use
6175
        dump_cfg_function_to_file.
6176
        * tree-ssa-ccp.c (tree_ssa_ccp): Ditto.
6177
        * tree-ssa-copyprop.c (tree_ssa_copyprop): Ditto.
6178
        * tree-ssa-dce.c (tree_ssa_dce): Ditto.
6179
        * tree-ssa-dom.c (tree_ssa_dominator_optimize_1): Ditto.
6180
        * tree-ssa-pre.c (tree_perform_ssapre): Ditto.
6181
        * tree-ssa.c (rewrite_into_ssa, rewrite_out_of_ssa): Ditto.
6182
        * tree-tailcall.c (tree_optimize_tail_calls): Ditto.
6183
        * tree.h (optimize_function_tree): Declaration changed.
6184
 
6185
2003-11-03  Daniel Berlin  
6186
 
6187
        * tree-ssa-pre.c (handle_bb_creation): Removed.
6188
        (redo_dominators): Removed.
6189
        (insert_one_operand): Remove code to handle bb creation, since all
6190
        critical edges are now pre-split.
6191
        (finalize_2): Remove redo_dominators related code.
6192
        (pre_expression): Return 1 if we exited early because nothing happened.
6193
        (split_critical_edges): Do fake variable assignments instead, because
6194
        it works. return true if we actually split an edge.
6195
        (tree_perform_ssapre): Remove redo_dominators code.
6196
 
6197
2003-11-03  Zdenek Dvorak  
6198
 
6199
        * function.h (struct function): New field unexpanded_var_list.
6200
        * gimple-low.c (unexpanded_var_list): Removed.
6201
        (record_vars, expand_used_vars): Use cfun->unexpanded_var_list.
6202
        * tree-flow.h (unexpanded_var_list): Declaration removed.
6203
 
6204
        * gimplify.c (should_carry_locus_p): New.
6205
        (annotate_all_with_locus_1): Use it.  Do not annotate empty
6206
        statements.
6207
 
6208
2003-11-03  Jan Hubicka  
6209
 
6210
        * tree-cfg.c (tree_try_redirect_by_replacing_jump): Do not use
6211
        succesor_block.
6212
 
6213
2003-11-03  Zdenek Dvorak  
6214
 
6215
        * tree-pretty-print.c (dump_block_info): Add flags parameter.
6216
        Only show line number when asked to.
6217
        (dump_generic_node): Pass flags to dump_block_info.
6218
 
6219
2003-11-03  Jan Hubicka  
6220
 
6221
        * cfghooks.h (redirect_edge_and_branch hook): Make it return edge.
6222
        * cfgrtl.c (cfg_layout_redirect_edge_and_branch,
6223
        rtl_redirect_edge_and_branch, try_redirect_by_replacing_jump):
6224
        Update to new interface.
6225
        * tree-cfg.c (tree_cfg_hooks): Move to end of file; set
6226
        redirect_edge_and_branch and redirect_edge_and_branch_force.
6227
        (thread_jumps): Use redirect_edge_and_branch.
6228
        (tree_block_label): new; break out of thread_edge.
6229
        (tree_try_redirect_by_replacing_jump): New.
6230
        (thread_edge): Rename to tree_redirect_edge_and_branch; deal sanely
6231
        with unusual edges; preserve profile.
6232
        (tree_redirect_edge_and_branch_force): New.
6233
        * tree-flow.h (ssa_redirect_edge): Declare.
6234
        * tree-ssa.dom.c (tree_ssa_dominator_optimize): Use redirect_edge_and_branch.
6235
        * tree-ssa.c (ssa_redirect_edge): New.
6236
 
6237
2003-11-03  Jeff Law  
6238
 
6239
        * domwalk.h (struct dom_walk_data): New field "global_data".
6240
        * tree-ssa-dom.c (tree_ssa_dominator_optimize_1): Initialize new
6241
        "global_data" field.
6242
        * tree-flow.h (enum need_phi_state): New enumeration.
6243
        (var_ann_d): Add bitfield for need_phi_state.
6244
        * tree-ssa.c (mark_def_sites_global_data): New structure to hold
6245
        global data for mark_def_sites dominator walk.
6246
        (mark_def_sites): Revamp to be called via the dominator walker.
6247
        (set_def_block): Update need_phi_state for the variable as needed.
6248
        (set_livein_block): Similarly.
6249
        (rewrite_into_ssa): Use dominator walker to call mark_def_sites.
6250
        Delay freeing dominance info.  Kill "globals" bitmap.
6251
        (insert_phi_nodes): No longer need "globals" bitmap.  Use
6252
        need_phi_state in variable's annotation to determine if a PHI
6253
        may be needed.
6254
 
6255
        * tree-ssa-dom.c (dom_opt_finalize_block): Try to thread across the
6256
        edges leaving COND_EXPR nodes which are leafs in the dominator
6257
        tree.
6258
        (record_equivalences_from_incoming_edge): Do not set EQ_EXPR_VALUE
6259
        unless the block's single predecessor contains parent_block_last_stmt.
6260
 
6261
2003-11-03  Zdenek Dvorak  
6262
 
6263
        * tree-dump.c (dump_options): Add TDF_LINENO.
6264
        * tree-pretty-print.c (dump_generic_node): Print line number for
6265
        statements if asked to.
6266
        * tree.h (TDF_LINENO): New.
6267
        * doc/invoke.texi (lineno): Document.
6268
 
6269
2003-11-03  Zdenek Dvorak  
6270
 
6271
        * expr.c (expand_vars, expand_var): Split of ...
6272
        (expand_expr_1): ... here.
6273
        * expr.h (expand_var): Declare.
6274
        * gimple-low.c (lower_function_body, lower_stmt, lower_bind_expr):
6275
        Eliminate BIND_EXPRs.
6276
        (expand_used_vars): New.
6277
        * tree-alias-common.c (create_alias_vars): Walk variables in blocks.
6278
        * tree-cfg.c (make_bind_expr_blocks): Removed.
6279
        (make_blocks, build_tree_cfg, factor_computed_gotos): Don't handle
6280
        BIND_EXPRs.
6281
        (assign_vars_to_scope, successor_block, NEXT_BLOCK_LINK): Removed.
6282
        (make_edges, make_exit_edges): Don't use successor_block.
6283
        (remove_useless_stmts_and_vars_goto): Don't expect NEXT_BLOCK_LINK
6284
        to be set.
6285
        (bsi_init, bsi_next_in_bb, bsi_from_tsi): Don't handle BIND_EXPRs.
6286
        (replace_stmt): Don't create BIND_EXPRs.
6287
        * tree-flow.h (struct var_ann_d): Removed field scope.
6288
        (struct stmt_ann_d): Removed fields scope and scope_level.
6289
        (propagate_copy): Declaration changed.
6290
        (fixup_var_scope): Removed.
6291
        * tree-must-alias.c (tree_compute_must_alias): Consider DECL_NONLOCAL
6292
        vars call clobbered.
6293
        * tree-optimize.c (tree_rest_of_compilation): Call expand_used_vars.
6294
        * tree-ssa-copyprop.c (move_var_to_scope, fixup_var_scope): Removed.
6295
        (copyprop_stmt): Call to propagate_copy changed.
6296
        (propagate_copy): Don't update scope.
6297
        * tree-ssa-dom.c (cprop_into_stmt): Call to propagate_copy changed.
6298
        (eliminate_redundant_computations): Don't call fixup_var_scope.
6299
        * tree-ssa.c (insert_copy_on_edge): Don't update scope.
6300
 
6301
2003-11-02  Zdenek Dvorak  
6302
 
6303
        * tree-inline.c (walk_tree): Tail recursion optimized for
6304
        COMPOUND_EXPRs.
6305
        * tree-eh.c (collect_finally_tree): Ditto.
6306
 
6307
2003-11-02  Zdenek Dvorak  
6308
 
6309
        * tree-optimize.c (optimize_function_tree): Removed duplicate call of
6310
        lower_function_body.  Moved call of reset_block_changes ...
6311
        (tree_rest_of_compilation) ... here.  Reset the scope to top before
6312
        expanding function end.
6313
 
6314
2003-11-01  Zdenek Dvorak  
6315
 
6316
        * basic-block.h (BB_CONTROL_STRUCTURE): Removed.
6317
        * tree-cfg.c (struct cfg_stats_d): Field num_merged_cases removed.
6318
        (make_blocks, make_bind_expr_blocks, append_stmt_to_bb, bsi_link_after,
6319
        build_tree_cfg, factor_computed_gotos, prepend_stmt_to_bb,
6320
        remove_stmt, replace_stmt): Don't set parent.
6321
        (set_parent_stmt, add_stmt_to_bb, find_contained_blocks,
6322
        blocks_unreachable_p, remove_blocks, remove_unreachable_block,
6323
        move_outgoing_edges, merge_tree_blocks, remap_stmts): Removed.
6324
        (REMOVE_ALL_STMTS, REMOVE_NO_STMTS, REMOVE_NON_CONTROL_STRUCTS,
6325
        REMOVE_CONTROL_STRUCTS): Removed.
6326
        (remove_bb): Code to handle control structures removed.
6327
        (tree_block_forwards_to): Don't stop due to CASE_LABEL_EXPRs.
6328
        (tree_dump_bb): Don't print parent.  Print only BIND_EXPRs in slim
6329
        form.
6330
        (dump_tree_cfg): Don't count merged case labels.
6331
        (is_ctrl_structure): Removed.
6332
        (stmt_starts_bb_p): Don't handle CASE_LABEL_EXPRs.
6333
        (tree_verify_flow_info): Don't check BB_CONTROL_STRUCTURE.
6334
        * tree-flow-inline.h (parent_block, parent_stmt): Removed.
6335
        * tree-flow.h (struct stmt_ann_d): Remove parent_stmt field.
6336
        (parent_stmt, parent_block, is_ctrl_structure): Declarations removed.
6337
        * tree-pretty-print.c (dump_generic_node): Don't handle lowered
6338
        COND_EXPRs specially.
6339
        * tree-ssa-ccp.c (visit_stmt): Don't check is_ctrl_structure.
6340
 
6341
2003-10-31  Jeff Law  
6342
 
6343
        * tree-ssa-dom.c (record_equivalences_from_stmt): Restore lost code
6344
        to create equivalences from BIT_IOR_EXPR.
6345
 
6346
        * tree-ssa-dom.c (thread_jumps_walk_stmts): Go ahead and optimize
6347
        a COND_EXPR with a compile-time constant condition.
6348
 
6349
2003-10-31  Diego Novillo  
6350
 
6351
        * tree-optimize.c (optimize_function_tree): Fix comment
6352
        describing SSA pass after DOM2.
6353
 
6354
2003-10-31  Diego Novillo  
6355
 
6356
        Fix PR optimization/12825
6357
        * tree-optimize.c (optimize_function_tree): Run SSA renamer after
6358
        second DOM pass.
6359
 
6360
2003-10-30  Richard Henderson  
6361
 
6362
        * c-common.c (match_case_to_enum_1, match_case_to_enum): New.
6363
        (c_do_switch_warnings): New.
6364
        * c-common.h (c_do_switch_warnings): Declare.
6365
        * c-typeck.c (c_finish_case): Call it.
6366
        * stmt.c (all_cases_count, BITARRAY_TEST, BITARRAY_SET,
6367
        mark_seen_cases, check_for_full_enumeration_handling): Remove.
6368
        (expand_end_case_type): Don't do warn_switch handling.
6369
        * expr.h, tree.h: Remove dead decls.
6370
 
6371
        * c-simplify.c (gimplify_switch_stmt): Force switch body non-null.
6372
 
6373
2003-10-30  Richard Henderson  
6374
 
6375
        * tree-cfg.c (thread_jumps): Allow SWITCH_EXPR.
6376
        (thread_edge): Handle it.  Tidy surrounding code.
6377
 
6378
2003-10-30  Richard Henderson  
6379
 
6380
        * domwalk.c (walk_dominator_tree): Pass any final is_ctrl_stmt
6381
        down the recursive walk.
6382
 
6383
2003-10-30  Jeff Law  
6384
 
6385
        * tree-ssa-dom.c (thread_across_edge): Renamed from
6386
        thread_through_successor.  Revamp to thread the destination of an edge
6387
        rather than the successors of a block.
6388
        (dom_opt_finalize_block): Corresponding changes.  Do not bother calling
6389
        thread_across_edge unless we are at a leaf in the dominator tree.
6390
 
6391
        * tree-cfg.c (thread_jumps): Now returns a bool.  Move some tests into
6392
        tree_forwarder_block_p.  Improve comments.
6393
        (cleanup_control_flow): Now returns a bool indicating if anything was
6394
        changed.
6395
        (thread_unconditional_jumps): Kill.
6396
        (cleanup_tree_cfg): Repeat cascading cleanups until nothing changes.
6397
        (tree_forwarder_block_p): Check forwardable bit in the block's
6398
        annotation to avoid useless work.  Mark blocks as not forwardable as
6399
        appropriate.  Verify destination is not the exit block here.  Do not
6400
        consider successors of the entry block as forwarders.  Ignore empty
6401
        statements when walking through the block's statements.  Verify target
6402
        block is not the start of a case label and that we can safely insert
6403
        a label at the target block.
6404
 
6405
2003-10-29  Richard Henderson  
6406
 
6407
        * c-common.c (c_warn_unused_result): Remove lowered containers.
6408
        * c-semantics.c (genrtl_case_label): Update add_case_node call.
6409
        * c-simplify.c (gimplify_switch_stmt): Build SWITCH_EXPR and
6410
        gimplify it simultaneously with the body.
6411
        * expr.c (expand_expr_1): Handle SWITCH_BODY clear and
6412
        SWITCH_LABELS set.  Update add_case_node calls.
6413
        * gimple-low.c (lower_stmt): Don't do anything for SWITCH_EXPR.
6414
        (lower_switch_expr, lower_case_label_expr): Remove.
6415
        * gimplify.c (gimplify_switch_expr): Zap SWITCH_BODY after
6416
        gimplification.  Force default entry for SWITCH_LABELS.
6417
        (gimplify_case_label_expr): Rename from gimple_add_case_label.
6418
        Assert switch in scope; lower to LABEL_EXPR.
6419
        * stmt.c (pushcase, pushcase_range) Update add_case_node calls.
6420
        (add_case_node): Add dont_expand_label argument.
6421
        (same_case_target_p): Don't search rtl.
6422
        * tree-cfg.c (enum find_location_action): Remove.
6423
        (make_switch_expr_blocks): Remove.
6424
        (make_blocks): Update.
6425
        (make_case_label_edges): Remove.
6426
        (make_edges): Update.
6427
        (find_contained_blocks): Remove lowered containers.
6428
        (make_switch_expr_edges): New.
6429
        (make_ctrl_stmt_edges): Call it.
6430
        (make_cond_expr_edges): Use label_to_block.
6431
        (remove_useless_stmts_and_vars_1): Don't go into SWITCH_BODY.
6432
        (remove_unreachable_block): Remove SWITCH_EXPR special case.
6433
        (cleanup_cond_expr_graph): Tidy.
6434
        (cleanup_switch_expr_graph): Rewrite.
6435
        (disconnect_unreachable_case_labels): Remove.
6436
        (find_taken_edge_cond_expr): Use integer_zerop/integer_nonzerop.
6437
        (find_taken_edge_switch_expr): Rewrite.
6438
        (value_matches_some_label): Remove.
6439
        (find_case_label_for_value): New.
6440
        (is_ctrl_structure): Remove lowered containers.
6441
        (is_ctrl_stmt): Add SWITCH_EXPR.
6442
        (switch_parent): Remove.
6443
        (handle_switch_fallthru): Remove.
6444
        (handle_switch_split): Remove.
6445
        (find_insert_location): Merge into ...
6446
        (bsi_insert_on_edge_immediate): ... here.  Simplify.
6447
        (tree_split_edge): Don't set EDGE_FALLTHRU.
6448
        * tree-eh.c (collect_finally_tree): Remove lowered containers.
6449
        (replace_goto_queue_1, block_may_fallthru_last): Likewise.
6450
        (lower_eh_constructs_1): Likewise.
6451
        (verify_norecord_switch_expr): New.
6452
        (lower_try_finally_switch): Generate lowered switches.
6453
        * tree-inline.c (expand_calls_inline): Don't search null SWITCH_BODY.
6454
        * tree-pretty-print.c (dump_generic_node): Do something sensible
6455
        with lowered switch_expr.
6456
        * tree-ssa-dom.c (record_equivalences_from_incoming_edge): Update
6457
        for lowered switch_expr.
6458
        * tree.def (SWITCH_EXPR): Update docs.
6459
        * tree.h (add_case_node): Update decl.
6460
 
6461
2003-10-29  Daniel Berlin 
6462
 
6463
        * tree-ssa-pre.c (n_phi_preds): New variable.
6464
        (generate_vops_as_of_bb): New function
6465
        (generate_expr_as_of_bb): Remove unused first argument. Update all
6466
        callers.
6467
        (subst_phis): Add boundary check for the phi_pred_cache array.
6468
        (same_e_version_phi_result): Once modified, no point in continuing
6469
        the loop.
6470
        (finalize_2): ESSA Minimization can crash if we ended up with new
6471
        BB's
6472
 
6473
2003-10-29  Richard Henderson  
6474
 
6475
        * tree-eh.c (do_return_redirection): Don't move copy to RESULT_DECL
6476
        outside the RETURN_EXPR.  Introduce a new temporary as needed.
6477
 
6478
2003-10-26  Richard Henderson  
6479
 
6480
        * gimplify.c (keep_function_tree_in_gimple_form): Remove.
6481
        (gimplify_function_tree): Return void.  Remove hack for
6482
        language not supporting gimple.
6483
        * tree.h: Update decls.
6484
        * langhooks-def.h (LANG_HOOKS_GIMPLE_BEFORE_INLINING): New.
6485
        * langhooks.h (struct lang_hooks): Add gimple_before_inlining.
6486
        * tree-inline.c (copy_body_r): Check that instead of
6487
        keep_function_tree_in_gimple_form.
6488
        (initialize_inlined_parameters): Likewise.
6489
        (expand_call_inline, expand_calls_inline): Likewise.
6490
 
6491
        * explow.c (probe_stack_range): Never emit loop notes.
6492
        * expr.c (emit_block_move_via_loop): Likewise.
6493
        * toplev.c (rest_of_compilation): Always synthesize loop notes.
6494
 
6495
2003-10-26  Zdenek Dvorak  
6496
 
6497
        * Makefile.in (gimple-low.o): Add function.h dependency.
6498
        * gimple-low.c (struct lower_data): New field block.
6499
        (lower_function_body, lower_stmt, lower_bind_expr): Record
6500
        the block at statements.
6501
        * cfglayout.c (insn_locators_initialize): Use new info about
6502
        blocks.
6503
        * expr.c (expand_expr): Record block changes.
6504
        * function.c (blocks_nreverse): Export.
6505
        (uninitialized_vars_warning): Use DECL_RTL_SET_P to test for presence
6506
        of rtl.
6507
        (reset_block_changes, record_block_change, finalize_block_changes,
6508
        check_block_change, free_block_changes): New functions.
6509
        * function.h (struct function): New bitfield dont_emit_block_notes.
6510
        New field ib_boundaries_block.
6511
        (blocks_nreverse, reset_block_changes, record_block_change,
6512
        finalize_block_changes, check_block_change, free_block_changes):
6513
        Declare.
6514
        * sibcall.c (optimize_sibling_and_tail_recursive_call): Don't call
6515
        reorder_blocks when dont_emit_block_notes.
6516
        * stmt.c (expand_start_bindings_and_block, expand_end_bindings):
6517
        Don't emit block notes when dont_emit_block_notes.
6518
        * toplev.c (rest_of_compilation): Don't call reorder_blocks when
6519
        dont_emit_block_notes.
6520
        * tree.c (build1): Initialize TREE_BLOCK field.
6521
        * tree-flow.h (lower_function_body): Declare.
6522
        * tree-optimize.c: Include function.h.
6523
        (optimize_function_tree): Call lower_function_body.
6524
        * tree.h (struct tree_exp): Add block field.
6525
        (TREE_BLOCK): New macro.
6526
 
6527
2003-10-26  Richard Henderson  
6528
 
6529
        * tree.h (tree_dump_index): Add TDI_lower.
6530
        * tree-dump.c (dump_files): Add .lower entry.
6531
        * tree-optimize.c (optimize_function_tree): Move lower_function_body,
6532
        (tree_rest_of_compilation): here.  Tidy .useless dump.
6533
 
6534
2003-10-25  Jan Hubicka  
6535
 
6536
        * c-common.c (c_estimate_num_insns_1): Kill.
6537
        (c_estimate_num_insns): Kill.
6538
        * c-common.h (c_estimate_num_insns): Kill.
6539
        * c-lang.c (LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS): Kill.
6540
        * cp-lang.c (LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS): Kill.
6541
        * objc-lang.c (LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS): Kill.
6542
        * java/lang.c (LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS): Kill.
6543
        (java_estimate_num_insns_1, java_estimate_num_insns): Kill.
6544
        * cgraphunit (cgraph_analyze_function): Use estimate_num_insns.
6545
        * tree-eh.c (decide_copy_try_finally): Likewise.
6546
        * tree-inline.c (limits_allow_inilining, optimize_inline_calls): Likewise.
6547
        (estimate_num_insns_1, estimate_num_insns): New functions.
6548
        * langhooks-def.h (LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS): Kill.
6549
        * langhooks.h (estimate_num_inssn): Kill.
6550
        * tree-inline.h (estimate_num_insns): Declare.
6551
 
6552
2003-10-25  Zdenek Dvorak  
6553
 
6554
        * gimple-low.c: New.
6555
        * Makefile.in (gimple-low.o): Add.
6556
        * domwalk.c (walk_dominator_tree): Consider COND_EXPR a control
6557
        structure.
6558
        * tree-cfg.c (make_cond_expr_blocks, linearize_control_structures,
6559
        linearize_cond_expr): Removed.
6560
        (thread_jumps, tree_forwarder_block_p): New.
6561
        (merge_tree_blocks): Unused now.
6562
        (phi_alternatives_equal): Modified for use in jump threading.
6563
        (enum find_location_action): Remove EDGE_INSERT_LOCATION_NEW_ELSE.
6564
        (make_blocks): Don't call make_cond_expr_blocks.
6565
        (set_parent_stmt): Ensure we don't set COND_EXPR as a parent
6566
        statement.
6567
        (find_contained_blocks): Remove COND_EXPR alternative.
6568
        (make_cond_expr_edges): Handle lowered gotos.
6569
        (cleanup_tree_cfg): Don't call linearize_control_structures,
6570
        call thread_jumps and verify_flow_info and rerun cleanup_control_flow.
6571
        (remove_unreachable_block): Remove handling of structured COND_EXPRs.
6572
        (remove_bb): Fix warning for removed goto exprs.
6573
        (cleanup_control_flow, cleanup_cond_expr_graph,
6574
        cleanup_switch_expr_graph, find_taken_edge_cond_expr,
6575
        bsi_insert_before, find_insert_location, bsi_insert_on_edge_immediate):
6576
        Handle lowered COND_EXPRs.
6577
        (is_ctrl_structure): Remove COND_EXPR.
6578
        (is_ctrl_stmt): Add COND_EXPR.
6579
        (tree_verify_flow_info): Check validity of COND_EXPRs.
6580
        (thread_edge): Moved from tree-ssa-dom.c.
6581
        * tree-flow.h (cleanup_cond_expr_graph, cleanup_switch_expr_graph):
6582
        Declaration changed.
6583
        (thread_edge, lower_function_body): Declare.
6584
        * tree-optimize.c (optimize_function_tree): Call lower_function_body.
6585
        * tree-pretty-print.c (dump_generic_node): Dump lowered cond_exprs in
6586
        full.
6587
        * tree-ssa-copyprop.c (fixup_var_scope): Handle non-SSA_NAMEs.
6588
        * tree-ssa-dce.c (stmt_useful_p, process_worklist): Cleaned up when
6589
        COND_EXPRs are lowered.
6590
        * tree-ssa-dom.c (thread_edge): Moved to tree-cfg.c.
6591
        (tree_ssa_dominator_optimize_1): Dumps and setting of vars_to_rename
6592
        moved from thread_edge.
6593
        (optimize_stmt): Pass block iterator to cleanup_cond_expr_graph and
6594
        cleanup_switch_expr_graph.
6595
        * tree-ssa.c (insert_copy_on_edge): Fixup scope for emitted variables.
6596
 
6597
        * dominance.c (BB_NODE): Use VARRAY_GENERIC_PTR_NOGC.
6598
        (calculate_dominance_info): Use VARRAY_GENERIC_PTR_NOGC_INIT.
6599
        * varray.c (element): Add GENERIC_PTR_NOGC entry.
6600
        * varray.h (enum varray_data_enum): Add VARRAY_DATA_GENERIC_NOGC.
6601
        (union varray_data_tag): Add generic_nogc.
6602
        (VARRAY_GENERIC_PTR_NOGC_INIT,  VARRAY_GENERIC_PTR_NOGC,
6603
        VARRAY_PUSH_GENERIC_PTR_NOGC, VARRAY_TOP_GENERIC_PTR_NOGC): New.
6604
 
6605
2003-10-25  Jan Hubicka  
6606
 
6607
        * cppcharset.c (one_utf8_to_utf32): Initialize 's' to silence warning.
6608
 
6609
2003-10-25  Jan Hubicka  
6610
 
6611
        * fold-const.c (nondestructive_fold_binary_to_constant): Realize that
6612
        (plus (address) (const_int)) is a constant.
6613
 
6614
2003-10-25  Jan Hubicka  
6615
 
6616
        * opts.c (decode_options): Uncomment unit-at-a-time setting
6617
        * params.def: Syncrhonize with manline.
6618
        * tree-inline.c (initialize_inlined_parameters):  Set variable as
6619
        gimplified.
6620
 
6621
2003-10-24  Steven Bosscher  
6622
 
6623
        * gimplify.c (create_artificial_label): New function.
6624
        (build_and_jump): Use it.
6625
        * c-simplify.c (c_gimplify_stmt): Likewise.
6626
        (gimplify_condition): Likewise.
6627
        * tree-cfg.c (factor_computed_gotos, tree_block_forwards_to,
6628
        handle_switch_fallthru, handle_switch_split): Likewise.
6629
        * tree-ssa-dom.c (thread_edge): Likewise.
6630
        * tree-ssa-pre.c (split_critical_edges): Likewise.
6631
        * tree-tailcall.c (eliminate_tail_call): Likewise.
6632
        * tree-eh.c (frob_into_branch_around,
6633
        honor_protect_cleanup_actions, lower_try_finally_nofallthru,
6634
        lower_try_finally_onedest, lower_try_finally_copy,
6635
        lower_try_finally_switch, lower_catch, lower_eh_filter,
6636
        lower_cleanup): Likewise.
6637
        (make_label): Remove.
6638
        * tree-simple.h (create_artificial_label): Add prototype.
6639
        * tree-inline.c (expand_call_inline): Make return label for
6640
        inlined function artificial.
6641
 
6642
2003-10-23  Jeff Law  
6643
 
6644
        * timevar.def (TV_TREE_SSA_THREAD_JUMPS): New timevar.
6645
        * tree-dump.c (dump_files): Add dump file for jump threading.
6646
        * tree.h (TDI_thread_jumps): New enum member.
6647
        * tree-cfg.c (tree_block_forwards_to): No longer static.
6648
        * tree-flow.h (tree_block_forwards_to): Prototype.
6649
        (tree_ssa_dominator_thread_jumps): Likewise.
6650
        * tree-optimize.c (optimize_function_tree): Call jump threader.
6651
        * tree-ssa-dom.c (tree_ssa_dominator_optimize_1): New function.
6652
        Common code for redundancy elimination and jump threading on
6653
        the dominator tree.  Slightly different callback initialization
6654
        for redundancy elimination and jump threading.  Initialize
6655
        block forwardable attribute.
6656
        (tree_ssa_dominator_optimize): Call tree_ssa_dominator_optimize_1.
6657
        (tree_ssa_dominator_thread_jumps): New function.
6658
        (thread_edge): Mark results of PHI nodes as needing rewriting if
6659
        we have threaded through a block with PHI nodes.
6660
        (thread_through_successor): If thread_through_phis is nonzero,
6661
        then allow jump threading through blocks with PHI nodes.  If the
6662
        target block is a forwarder block, then forward the jump.
6663
        (thread_jumps_walk_stmts): Statement walker for dominator thread
6664
        jumping.
6665
 
6666
        * tree-ssa-dom.c (record_equivalence_from_incoming_edge): Fix
6667
        comment typo.
6668
 
6669
2003-10-23  Richard Henderson  
6670
 
6671
        * gimplify.c (gimplify_*): Return gimplify_status.
6672
        (gimple_add_tmp_var): Set seen_in_bind_expr.
6673
        (gimplify_bind_expr): Likewise.  Kill if 0 code.
6674
        (gimplify_return_expr): Cope with error marks.
6675
        (gimple_push_cleanup): Do nothing if errors seen.
6676
        (gimplify_expr): Cope with error marks.  Use gimplify_status to
6677
        decide when to exit the main loop.  Zap statements with errors.
6678
        (gimplify_body): Return void.
6679
        (keep_function_tree_in_gimple_form): Don't exit on errors.
6680
        (gimplify_function_tree): Return bool.  Don't exit on errors.
6681
        * langhooks.c (lhd_gimplify_expr): Return GS_UNHANDLED.
6682
        * langhooks.h (struct lang_hooks): Update docs for gimplify_expr.
6683
        * tree-optimize.c (optimize_function_tree): Don't exit on errors.
6684
        Move delete_tree_cfg call outside optimization clause.
6685
        (tree_rest_of_compilation): Don't exit on errors.
6686
        * tree-simple.h (enum gimplify_status): New.
6687
        (gimplify_expr, gimplify_stmt, gimplify_body): Update.
6688
        * tree-ssa.c (rewrite_out_of_ssa): Move delete_tree_cfg call to
6689
        optimize_function_tree.
6690
        * tree.h (struct tree_decl): Add seen_in_bind_expr.
6691
        (gimplify_function_tree): Update.
6692
        * c-common.c (c_add_case_label): Unify three error exit paths.
6693
        Create a normal label, not a case label to suppress unreachable
6694
        code warning.
6695
        * c-simplify.c (c_build_bind_expr): Don't create an empty bind
6696
        body.  Pass entire bind_expr to gimplify_stmt.
6697
        (gimplify_block): Don't abort on mismatches if errors seen.
6698
        (gimplify_expr_stmt): Cope with error marks.
6699
        (gimplify_decl_stmt): Likewise.
6700
        (c_gimplify_expr): Return gimplify_status.
6701
 
6702
2003-10-22  Daniel Berlin  
6703
 
6704
        * tree-pretty-print.c (dump_generic_node): Kill off ELEFT_NODE.
6705
        Print out status of new EUSE_LVAL flag.
6706
 
6707
        * tree-ssa-pre.c: #include alloc-pool.h
6708
        (append_eref_to_block): Inline.
6709
        (names_match_p): Ditto.
6710
        (pre_expression): Take sbitmap of variables to rename so we can
6711
        mark our new variable if necessary.
6712
        (insert_occ_in_preorder): Completely redo to be an O(n log n)
6713
        algorithm worst case, instead O(n^2) all the time.
6714
        (build_dfn_array): New function.
6715
        (eref_compare): Ditto.
6716
        (preorder_count): Remove no-longer used variable.
6717
        (pre_stats): Add new stats about memory use.
6718
        (struct expr_info): add loadpre_cand member.
6719
        (euse_node_pool): New alloc-pool
6720
        (eref_node_pool): Ditto
6721
        (create_expr_ref): Use them.
6722
        (expr_phi_insertion): Insert on PHI's of VUSES for loadpre cands.
6723
        Not all expressions have uses (left occurrences don't).
6724
        (load_modified_real_occ_real_occ): Return false, not abort.
6725
        (process_delayed_rename): Remove useless fibheap, do proper LVAL
6726
        handling.
6727
        (insert_euse_in_preorder_dt_order_1): No more ELEFT_NODE's.
6728
        (finalize_1): Ditto.
6729
        (set_save): Ditto.
6730
        (really_available_def): New function.
6731
        (finalize_2): Use really_available_def, not EUSE_SAVE, during EPHI
6732
        minimization.
6733
        (names_match_p): Handle INDIRECT_REF properly.
6734
        (call_modifies_slot): Removed.
6735
        (add_call_to_ei): Removed.
6736
        (process_left_occs_and_kills): Fix.
6737
        (pre_expression): Zero out counts.
6738
        (collect_expressions): Split out from tree_perform_ssapre. Do this
6739
        in domtree order.
6740
        (tree_perform_ssapre): Create and free alloc-pools.
6741
        Rename new variables that need to be renamed.
6742
 
6743
        * tree.c (tree_size): Remove ELEFT_NODE.
6744
        (tree_node_size): Ditto.
6745
        (is_essa_node): Ditto.
6746
 
6747
        * tree.def (ELEFT_NODE): Gone.
6748
 
6749
        * tree.h (EREF_NODE_CHECK): No more ELEFT_NODE.
6750
        (struct tree_eref_common): Add ID flag.
6751
        (struct tree_euse_node): Add lval flag.
6752
        (EREF_ID): New macro.
6753
        (EUSE_LVAL): New macro.
6754
 
6755
2003-10-22  Daniel Berlin  
6756
 
6757
        * tree-flow-inline.h (add_dom_child): XMALLOC, not GGC_ALLOC,
6758
        the bitmap.
6759
        (clear_dom_children): XFREE the bitmap.
6760
 
6761
2003-10-22  Andrew MacLeod  
6762
 
6763
        * tree-ssa-live.c (new_tree_live_info, (delete_tree_live_info,
6764
        live_worklist, set_if_valid, add_livein_if_notdef,
6765
        calculate_live_on_entry, calculate_live_on_exit,
6766
        add_conflicts_if_valid, dump_live_info): Use bitmap instead of sbitmap.
6767
        (build_tree_conflict_graph): Use bitmap, Change mechanism for
6768
        adding conflicts between live-on-entry partitions.
6769
        * tree-ssa-live.h (struct tree_live_info_d): Switch to bitmaps.
6770
        (partition_is_global, live_entry_blocks, live_on_exit,
6771
        live_merge_and_clear, make_live_on_entry): Switch to bitmaps.
6772
        * tree-ssa.c (struct _elim_graph): Remove bitmaps, use varrays.
6773
        (new_elim_graph, clear_elim_graph, delete_elim_graph): Switch from
6774
        old bitmap implementation.
6775
        (elim_graph_size): New. Number of elements in elimination graph.
6776
        (elim_graph_add_node): New. Add an element to the elim-graph.
6777
        (elim_graph_add_edge): New. Add an edge to the elim-graph.
6778
        (elim_graph_remove_succ_edge): New. Remove an edge for which a node
6779
        has a successor.
6780
        (FOR_EACH_ELIM_GRAPH_SUCC): Find all successor nodes.
6781
        (FOR_EACH_ELIM_GRAPH_PRED): Find all predeccesor nodes.
6782
        (eliminate_name, eliminate_build, elim_forward,
6783
        elim_unvisited_predecessor, elim_backward, elim_create, eliminate_phi):
6784
        Use new elim-graph routines.
6785
        (rewrite_out_of_ssa): Enable single-definition compaction when not
6786
        combining temporaries.
6787
 
6788
2003-10-21  Richard Henderson  
6789
 
6790
        * gimplify.c: Sort functions into use order, and all gimplification
6791
        functions to the end.
6792
 
6793
2003-10-22  Jeff Law  
6794
 
6795
        * tree-cfg.c (thread_unconditional_jumps): New function.
6796
        (tree_block_forwards_to): Likewise.
6797
        (cleanup_tree_cfg): Call thread_unconditional_jumps.
6798
        * tree-flow.h (bb_ann_t): Add forwardable status bit.
6799
 
6800
        * tree-dump.c (dump_files): Add entry for TDI_none.
6801
        (dump_begin): Do nothing for TDI_none.
6802
        (dump_enable_all, dump_switch_p): Start our scan at TDI_none + 1.
6803
        * tree.h (tree_dump_index): Add.
6804
        * tree-ssa-dom.c (tree_ssa_dominator_optimize): If we have altered the
6805
        CFG and we have variables to [re]rename, go ahead and rename them before
6806
        starting the next iteration of the dominator optimizer.
6807
 
6808
2003-10-21  Jason Merrill  
6809
 
6810
        * gimplify.c (gimplify_modify_expr): Require a regvar on either
6811
        the lhs or rhs if we're dealing with a renameable type.
6812
        (canonicalize_component_ref): New fn.
6813
        (gimplify_compound_lval): Use it.
6814
        (gimplify_conversion): Use it.
6815
        (gimplify_expr): Lose redundant STRIP_MAIN_TYPE_NOPS.
6816
        Discard conversions in void context.
6817
 
6818
2003-10-21  Daniel Berlin  
6819
 
6820
        * tree-ssa-pre.c (pre_expression): Free and allocate the
6821
        ephi_pindex_htab and phi_pred_cache in this function only.
6822
        (phi_pred_cache): New array to store cached phi preds, to avoid
6823
        recomputation and unnecessary copying.
6824
        (subst_phis): Use it.
6825
        (added_phis): array of added phis that is marked for GC.
6826
 
6827
        * Makefile.in: Add tree-ssa-pre.c to the gtype files, and
6828
        gt-tree-ssa-pre.h to the list of generated files.
6829
 
6830
2003-10-21  Jason Merrill  
6831
 
6832
        PR optimization/12661
6833
        * tree-dfa.c (get_expr_operands): Handle TRUTH_NOT_EXPR.
6834
        * tree-simple.c (is_gimple_rhs): Allow TRUTH_NOT_EXPR.
6835
        * gimplify.c (gimplify_expr) : Don't rewrite to an
6836
        EQ_EXPR.
6837
 
6838
2003-10-21  Jan Hubicka  
6839
 
6840
        * haifa-sched.c (choose_ready): Initialize index.
6841
        * tree-tailcall.c (bb_optimize_tail_calls): Initialize has_return.
6842
        * f/lex.c (ffelex_cfelex_): Initialize d.
6843
 
6844
2003-10-20  Diego Novillo  
6845
 
6846
        Fix PR optimization/12688
6847
        * tree-dfa.c (get_stmt_operands): Don't return early when dealing
6848
        with an empty statement.
6849
        * tree-ssa-ccp.c (set_rhs): If the expression has no side effects,
6850
        replace the statement with an empty statement.
6851
 
6852
2003-10-20  Andrew MacLeod  
6853
 
6854
        * tree-ssa-dce.c (processed): Change to an sbitmap.
6855
        (mark_necessary): Test bits in 'processed'.
6856
        (tree_ssa_dce): Initialize/free processed as an sbitmap.
6857
 
6858
2003-10-20  Diego Novillo  
6859
 
6860
        * tree-cfg.c (bsi_prev): Also copy the context from the previous
6861
        iterator.
6862
 
6863
2003-10-18  Richard Henderson  
6864
 
6865
        * builtins.c (simplify_builtin): Handle BUILT_IN_CONSTANT_P.
6866
 
6867
2003-10-18  Zdenek Dvorak  
6868
 
6869
        * tree-tailcall.c: New.
6870
        * Makefile.in (tree-tailcall.o): Add.
6871
        * function.c (assign_parms): Setting of current_function_stdarg
6872
        moved ...
6873
        (allocate_struct_function): ... here.
6874
        * tree-dump.c (dump_files): Add .tail dump.
6875
        * tree-flow.h (tree_optimize_tail_calls): Declare.
6876
        * tree-optimize.c (optimize_function_tree): Call
6877
        tree_optimize_tail_calls.
6878
        * tree.h (enum tree_dump_index): Add TDI_tail.
6879
 
6880
2003-10-18  Jan Hubicka  
6881
 
6882
        * tree-ssa-copyprop.c (move_var_to_scope):  Do not clear abstract
6883
        origin for static variables.
6884
 
6885
2003-10-18  Jan Hubicka  
6886
 
6887
        * integrate.c (copy_decl_for_inlinig): Fix copying of copies.
6888
 
6889
2003-10-18  Jan Hubicka  
6890
 
6891
        * cgraphunit.c (cgraph_analyze_function):  Fix call of estimate_num_insns.
6892
 
6893
2003-10-17  Kazu Hirata  
6894
 
6895
        * ChangeLog.tree-ssa: Fix typos.
6896
        * tree-alias-common.c: Fix comment typos.
6897
        * tree-cfg.c: Likewise.
6898
        * tree-dfa.c: Likewise.
6899
        * tree-eh.c: Likewise.
6900
        * tree-flow.h: Likewise.
6901
        * tree-iterator.h: Likewise.
6902
        * tree-mudflap.c: Likewise.
6903
        * tree-ssa-ccp.c: Likewise.
6904
        * tree-ssa-dce.c: Likewise.
6905
        * tree-ssa-dom.c: Likewise.
6906
        * tree-ssa-live.c: Likewise.
6907
        * tree-ssa-live.h: Likewise.
6908
        * tree-ssa-pre.c: Likewise.
6909
        * tree-ssa.c: Likewise.
6910
 
6911
2003-10-17  Andrew MacLeod  
6912
 
6913
        * tree-ssa-dce.c (processed): New Global vector.
6914
        (mark_necessary): Check if SSA_NAME has already been processed first.
6915
        (find_useful_stmts, process_worklist): Change call to mark_necessary().
6916
        (tree_ssa_dce): Initialize and free processed vector.
6917
        * tree-cfg.c (handle_switch_fallthru): A new basic block can result
6918
        from splitting edges of nested switch stmts.
6919
        (handle_switch_split): If a new block is created, restart the loop for
6920
        inserting GOTO's to handle the new block.
6921
 
6922
2003-10-17  Jan Hubicka  
6923
 
6924
        * tree-cfg.c (remove_useless_stmts_and_vars_bind): Fix handling of
6925
        static variables.
6926
 
6927
2003-10-16  Richard Henderson  
6928
 
6929
        * common.opt (fdisable-gimple): Remove.
6930
        * flags.h (flag_disable_gimple): Remove.
6931
        * toplev.c (flag_disable_gimple): Remove.
6932
        (process_options): Don't check it.
6933
        (lang_independent_options): Don't set it.
6934
        * opts.c (common_handle_option): Likewise.
6935
        * gimplify.c (keep_function_tree_in_gimple_form): Don't check it.
6936
        * c-semantics.c (expand_stmt_toplev): Likewise.
6937
        * tree-optimize.c (tree_rest_of_compilation): Likewise.
6938
        * doc/invoke.texi: Don't document it.
6939
 
6940
2003-10-16  Roger Sayle  
6941
 
6942
        * fold-const.c: Merge from mainline.
6943
        * tree.c (associate_tree_code, commutative_tree_code): Use a
6944
        switch statement instead of a sequence of comparisons.
6945
 
6946
2003-10-16  Richard Henderson  
6947
 
6948
        * gimplify.c (maybe_protect_cleanup): Remove.
6949
        * tree-simple.h (maybe_protect_cleanup): Remove.
6950
        * c-simplify.c (gimplify_cleanup): Don't call it.
6951
 
6952
2003-10-16  Jeff Law  
6953
 
6954
        * tree-cfg.c (found_computed_goto): New global for computed goto
6955
        factoring/unfactoring.
6956
        (factored_computed_goto_label, factored_computed_goto): Likewise.
6957
        (factor_computed_gotos): New function.
6958
        (build_tree_cfg): Use it.
6959
        (make_blocks): Record whether or not we find a computed goto.
6960
        (remove_useless_stmts_and_vars): Un-factor computed gotos.
6961
        (remove_useless_stmts_and_vars): Reset factored_computed_goto_label
6962
        and factored_computed_goto.
6963
 
6964
        * tree-ssa-dom.c (get_value_for, set_value_for): Move to the start
6965
        of the file.  Delete pointless sanity checking.
6966
 
6967
        * tree-ssa.c (currdefs): Now a varray instead of a hash table.
6968
        (get_value_for, set_value_for): Corresponding changes.  Move to
6969
        the start of the file and delete pointless sanity checking.
6970
        (rewrite_into_ssa, dump_tree_ssa_stats): Corresponding changes.
6971
        (var_value_hash, var_value_eq): Kill.
6972
 
6973
        * tree-ssa.c (rewrite_add_phi_arguments): Once we encounter a
6974
        rewritten PHI break the inner loop.
6975
 
6976
        * tree-ssa.c (insert_phi_nodes_for): Use EXECUTE_IF_AND_COMPL_IN_BITMAP.
6977
 
6978
        * tree-dfa.c (create_phi_node):  Clear PHI_REWRITTEN on all new PHIs
6979
        (remove_all_phi_nodes_for): Set PHI_REWRITTEN on any PHIs which are
6980
        not removed.
6981
        * tree-ssa.c (rewrite_add_phi_arguments): Check the PHI node itself
6982
        to see if it has already been rewritten.
6983
        * tree.h (PHI_REWRITTEN): New accessor macro.
6984
        (struct phi_node): New field rewritten.
6985
 
6986
        * tree-flow.h (struct bb_ann_d): New field num_preds.
6987
        * tree-dfa.c (create_phi_node): Get the number of predecessors from
6988
        the block's annotation.
6989
        * tree-ssa.c (rewrite_into_ssa): Compute number of preds for each
6990
        block and store it into the block's annotation.
6991
        (insert_phi_nodes_for): Get the number of preds for each block
6992
        from the block's annotation.
6993
 
6994
        * tree-ssa.c: Remove parallel lifetime analysis code from April 2003.
6995
        (def_blocks_d): Remove PHI_INSERTION_POINTS field.
6996
        (compute_global_livein): Accept livein/def bitmaps to use for
6997
        life analyis rather than a varray of variables.  Callers updated.
6998
        Rewritten to compute life information for one variable at a
6999
        time instead of several variables at once.
7000
        (insert_phis_for_deferred_variables): Remove.
7001
        (insert_phi_nodes_for): Lose varray argument.  Callers updated.
7002
        No longer mess with deferring PHI insertions for variables.
7003
        (insert_phi_nodes): No longer need to deal with deferred variables.
7004
        Kill everything related to them.
7005
 
7006
2003-10-15  Jeff Law  
7007
 
7008
        * domwalk.c, domwalk.h: New files.
7009
        * Makefile.in (OBJS-common): Add domwalk.c.
7010
        (tree-ssa-dom.o): Add dependency on $(BASIC_BLOCK_H) and domwalk.h.
7011
        (tree-ssa.o): Add dependency on domwalk.h.
7012
        (domwalk.o): Add dependencies.
7013
        * tree-ssa-dom.c: Include domwalk.h.
7014
        (cfg_altered, vars_to_rename): Now globals.
7015
        (dom_walk_block_data): New structure for block data used by dominator
7016
        walker.
7017
        (optimize_block, record_equivalences_from_block_entry): Kill.
7018
        (optimize_stmt): Lose "cfg_altered" argument.  Update callers.
7019
        Initialize may_have_exposed_new_symbols.
7020
        (get_value_for, set_value_for): Lose "table" argument.  Update
7021
        callers.  Use const_and_copies table directly.
7022
        (lookup_avail_expr): Lose "const_and_copies" argument.  Callers
7023
        updated.
7024
        (get_eq_expr_value): Similarly.  Also accept a pointer to the
7025
        vrp_variables. Callers updated.
7026
        (update_rhs_and_lookup_avail_expr): Similarly.
7027
        (record_cond_is_true, record_cond_is_false): Similarly.
7028
        (simplify_rhs_and_lookup_avail_expr): Similarly.
7029
        (simplify_cond_and_lookup_avail_expr): Similarly.
7030
        (record_equivalences_from_phis): Similarly.
7031
        (record_equivalences_from_incoming_edge): Similarly.  Also accept
7032
        a pointer to the block const_and_copies table and vrp_variables.
7033
        Callers updated.
7034
        (eliminate_redundant_computations): Similarly
7035
        (record_equivalences_from_stmt, thread_through_successor): Similarly.
7036
        (dom_opt_initialize_block): New function.  Perform block local
7037
        initialization for the dominator optimizer.
7038
        (dom_opt_finalize_block): Renamed from finalize_block.  Get
7039
        block local varrays from walk_data.  Pop entry off block local
7040
        data stack when complete.
7041
        (dom_opt_walk_stmts): New function.
7042
        (cprop_into_phis): Get block local varrays from walk_data.
7043
        (record_range): Get vrp varray by reference than by value.
7044
        (tree_ssa_dominator_optimize): Store incoming "vars" variable into
7045
        global "vars_to_rename".  Initialize walk_data.  Use
7046
        walk_dominator_tree.
7047
        (cprop_into_stmt): Initialize may_have_exposed_new_symbols.
7048
        * tree-ssa.c: Include domwalk.h
7049
        (rewrite_finalize_block, rewrite_initialize_block): New functions
7050
        extracted from rewrite_block.
7051
        (rewrite_walk_stmts, rewrite_add_phi_arguments): Similarly.
7052
        (rewrite_block): Kill.
7053
        (rewrite_into_ssa): Initialize walk_data.  Use walk_dominator_tree.
7054
 
7055
2003-10-14  Richard Henderson  
7056
 
7057
        * gimplify.c (gimplify_expr): Return bool.  Bail gracefully if
7058
        fb_mayfail is set.
7059
        (gimplify_asm_expr): Take pointer-to-expr.  Allow gimplify_expr
7060
        to fail for lvalues, and issue appropriate error messages.  Zap
7061
        the entire asm statement on failure.
7062
        * tree-simple.h (enum fallback_t): Add fb_mayfail.
7063
 
7064
2003-10-14  Richard Henderson  
7065
 
7066
        * c-tree.h (C_LANG_TREE_NODE_CHAIN_NEXT): New.
7067
        (union lang_tree_node): Use it for chain_next annotation.
7068
 
7069
2003-10-14  Richard Henderson  
7070
 
7071
        * c-common.c: Include tree-iterator.h.
7072
        (c_expand_expr): Kill warn_unused_result checks.
7073
        (c_warn_unused_result): New.
7074
        * c-common.h (STMT_EXPR_WARN_UNUSED_RESULT): Remove.
7075
        (c_warn_unused_result): Declare.
7076
        * c-decl.c (finish_function): Always gimplify.  Call
7077
        c_warn_unused_result.
7078
        * calls.c (expand_call): Kill warn_unused_result checks.
7079
        * Makefile.in (c-common.o): Update.
7080
 
7081
2003-10-15  Steven Bosscher  
7082
 
7083
        * cfghooks.c (dump_bb): Take extra `int indent' argument.
7084
        * cfg.c (dump_bb): Take extra argument to match cfg hook.
7085
        Write out all information about bb that is shared between the tree
7086
        and rtl representations.
7087
        * basic-block.c (dump_bb): Adjust prototype.
7088
        * cfgrtl.c (rtl_dump_bb): Update prototype to match cfg hook.
7089
        Use indent.
7090
        * flow.c (verify_wide_reg, verify_local_live_at_start):
7091
        Fixup dump_bb calls.
7092
        * tree-cfg.c (dump_tree_bb): Rename to tree_dump_bb.  Remove unused
7093
         `prefix' argument.  Put in tree_cfg_hooks as cfg hook for dump_bb.
7094
        (remove_bb, debug_tree_bb, dump_tree_cfg): Call dump_bb.
7095
        * tree-ssa (dump_tree_ssa): Likewise.
7096
        * tree-flow.h (dump_tree_bb): Replace with new tree_dump_bb
7097
        prototype.
7098
        * tree-pretty-print (dump_block_info): Match case of BLOCK, SUCC,
7099
        PRED with dump_bb.
7100
 
7101
2003-10-14  Daniel Berlin  
7102
 
7103
        * tree-alias-ander.c (throwaway_global): Delete.
7104
        (andersen_same_ponts_to_set): We handle all globals individually
7105
        now.
7106
        * tree-alias-common.c:  Remove doxygen markers.
7107
        (get_alias_var_decl): Always create an alias var for globals now.
7108
        Assign the global alias vars to GLOBAL_VAR, too.
7109
        (intra_function_call): Fix logic, do a bit of pre-filtering to
7110
        avoid useless global aliasing.
7111
        (get_values_from_constructor): It's the same for field based and
7112
        not field based.
7113
        (create_alias_vars): Remove special global var handling.
7114
        (same_points_to_set): Ditto.
7115
        (ptr_may_alias_var): Ditto.
7116
 
7117
2003-10-14  Jeff Law  
7118
 
7119
        * tree-ssa-dom.c (cprop_into_phis): Avoid doing useless work if the
7120
        edge we care about is abnormal.
7121
        * tree-ssa-copyprop (cprop_phi): Avoid doing useless work if the
7122
        destination of the PHI node occurs in an abnormal PHI.
7123
 
7124
        * tree-ssa-dom.c (record_equivalences_from_stmt): Renamed from
7125
        record_equivalances.  Caller updated.
7126
        (record_equivalences_from_phis): New function extracted from
7127
        optimize_block.
7128
        (record_equivalences_from_incoming_edge): Likewise.
7129
        (record_equivalances_from_block_entry): Likewise.
7130
        (cprop_into_phis): Likewise.
7131
        (optimize_stmt): Lots of code moved into new functions.  Call
7132
        record_equivlances_from_block_entry.
7133
 
7134
        * tree-ssa-dom.c (optimize_block): Simplify interface slightly.
7135
        Use finalize_block.  Extract edge_flags from our block's
7136
        incoming edge as necessary.  Simplify recursive call.
7137
        (thread_through_successor): Extracted from optimize_block.
7138
        (finalize_block): Similarly.
7139
 
7140
        * tree-ssa-dom.c (eliminate_redundant_computations): New function
7141
        extracted from optimize_stmt.
7142
        (record_equivalences): Similarly.
7143
        (optimize_stmt): Use eliminate_redundant_computations and
7144
        record_equivalences.  If fold_stmt changes stmt, then make sure
7145
        to get a new annotation as well.
7146
 
7147
        * tree-cfg.c (cleanup_control_flow): Pass last statement down to
7148
        cleanup_cond_expr_graph and cleanup_switch_expr_graph.
7149
        (cleanup_cond_expr_graph): Accept statement from caller and
7150
        use it.  Return nonzero if the predicate was constant.  No longer
7151
        static.
7152
        (cleanup_switch_expr_graph): Similarly.
7153
        (disconnect_unreachable_case_labels): Similarly, except that it
7154
        is still static.
7155
        * tree-flow.h (cleanup_cond_expr_graph): Prototype.
7156
        (cleanup_switch_expr_graph): Similarly.
7157
        * tree-ssa-dom.c (optimize_stmt): Also optimize the condition
7158
        in a SWITCH_EXPR.  Use COND_EXPR_COND and SWITCH_COND to get
7159
        conditions instead of relying upon known operand positions.
7160
        Use cleanup_cond_expr_graph and cleanup_switch_expr_graph rather
7161
        than open coding equivalents.
7162
        (lookup_avail_expr): Handle SWITCH_EXPRs.  Use COND_EXPR_COND and
7163
        SWITCH_COND to get conditions instead of relying upon known
7164
        operand positions.
7165
        (avail_expr_hash, avail_expr_eq): Similarly.
7166
 
7167
2003-10-14  Richard Henderson  
7168
 
7169
        * gimplify.c (gimplify_body): Save and restore input_location;
7170
        initialize input_location to DECL_SOURCE_LOCATION.
7171
        (gimplify_expr): Always save and restore input_location.
7172
 
7173
2003-10-14  Richard Henderson  
7174
 
7175
        * expr.c (expand_expr): Break out EXPR_LOCUS code from ...
7176
        (expand_expr_1): ... here, renamed from expand_expr.
7177
 
7178
2003-10-13  Richard Henderson  
7179
 
7180
        * c-simplify.c (c_gimplify_stmt): Upreate on location_t and not
7181
        fine and line individually.
7182
        (gimplify_c_loop, gimplify_switch_stmt): Likewise.
7183
        * gimplify.c (wfl_locus): Merge wfl_filename+wfl_lineno.
7184
        (annotate_all_with_locus_1): Rename from annotate_stmt_with_file_line.
7185
        (annotate_all_with_locus): Replace annotate_all_with_file_line;
7186
        update all callers.
7187
        * tree-simple.h: Update.
7188
        * tree.c, tree.h (annotate_with_locus): New.
7189
 
7190
2003-10-13  Steven Bosscher  
7191
 
7192
        * tree-flow-inline.h (def_ops): Take a stmt_ann_t as argument
7193
        instead of a tree.
7194
        (use_ops): Likewise.
7195
        (vdef_ops): Likewise.
7196
        (vuse_ops): Likewise.
7197
        * tree-flow.h: Update prototypes.
7198
        * tree-cfg.c (remove_stmt): Load the statement annotation.
7199
        Adjust *_ops calls.
7200
        * tree-dfa.c (compute_immediate_uses_for_stmt,
7201
        mark_new_vars_to_rename): Likewise.
7202
        * tree-pretty-print.c (dump_vops): Likewise.
7203
        * tree-ssa-ccp.c (tree_ssa_ccp): Likewise.  Also remove now
7204
        superfluous stmt_ann() calls.
7205
        (visit_stmt, cpp_fold, add_var_to_ssa_edges_worklist,
7206
        initialize, replace_uses_in, likely_value): Likewise.
7207
        * tree-ssa-copyprop.c (copyprop_stmt): Likewise.
7208
        * tree-ssa-dce.c (stmt_useful_p, process_worklist): Likewise.
7209
        * tree-ssa-dom.c (cprop_into_stmt, optimize_stmt,
7210
        avail_expr_hash, avail_expr_eq):
7211
        Likewise.
7212
        * tree-ssa-live.c (create_ssa_var_map, calculate_live_on_entry,
7213
        build_tree_conflict_graph): Likewise.
7214
        * tree-ssa-pre.c (maybe_find_rhs_use_for_var,
7215
        expr_phi_insertion, same_e_version_real_occ_real_occ,
7216
        generate_expr_as_of_bb, bool load_modified_real_occ_real_occ,
7217
        bool same_e_version_phi_result, get_default_def,reaching_def,
7218
        tree_perform_ssapre): Likewise.
7219
        * tree-ssa.c (mark_def_sites, rewrite_out_of_ssa, rewrite_stmt):
7220
        Likewise.
7221
 
7222
2003-10-12  Richard Henderson  
7223
 
7224
        * gimplify.c (gimplify_array_ref_to_plus): Be prepared for
7225
        null TYPE_DOMAIN or TYPE_MIN_VALUE for the array.
7226
        * tree-ssa-ccp.c (fold_indirect_refs_r): Likewise.
7227
 
7228
2003-10-12  Richard Henderson  
7229
 
7230
        * tree.h (struct tree_common): Rename unused_1 to invariant_flag.
7231
        (TREE_INVARIANT): New.
7232
        * builtins.c (build_string_literal): Set TREE_INVARIANT.
7233
        * c-common.c (fix_string_type): Likewise.
7234
        * c-typeck.c (build_external_ref): Likewise.
7235
        (build_c_cast, pop_init_level): Likewise.
7236
        * fold-const.c (fold_convert, fold): Likewise.
7237
        * tree.c (make_node, build_constructor): Likewise.
7238
        (build, build1): Likewise.
7239
        (staticp): Pass unknown component references to the language.
7240
        (save_expr): Check TREE_INVARIANT instead of TREE_CONSTANT.
7241
        (skip_simple_arithmetic): Likewise.
7242
        (stabilize_reference_1): Likewise.
7243
        * print-tree.c (print_node): Print TREE_INVARIANT.
7244
 
7245
        * c-common.c (pointer_int_sum): Rely on build to set TREE_CONSTANT.
7246
        (finish_label_address_expr): Likewise.
7247
        * c-typeck.c (default_function_array_conversion): Likewise.
7248
        (parser_build_binary_op, pointer_diff): Likewise.
7249
        (build_unary_op, build_binary_op): Likewise.
7250
        * fold-const.c (non_lvalue): Likewise.
7251
 
7252
        * tree-pretty-print.c (dump_generic_node): Handle VIEW_CONVERT_EXPR.
7253
 
7254
2003-10-12  Richard Henderson  
7255
            Diego Novillo  
7256
 
7257
        * gimplify.c (gimplify_array_ref_to_plus): Subtract the array
7258
        domain minimum index.
7259
        (gimplify_addr_expr): Expand ARRAY_REFs.  Cope with Fortran
7260
        missing cast wierdnesses.
7261
        * tree-dfa.c (get_expr_operands): Handle (&v + c); abort on
7262
        other address invariants that should have been folded.
7263
        (vdefs_disappeared_p): New.
7264
        (mark_new_vars_to_rename): Use it.  Move from ...
7265
        * tree-ssa-dom.c: ... here.
7266
        * tree-flow-inline.h (is_unchanging_value): Remove; use
7267
        is_gimple_min_invariant everywhere instead.
7268
        (phi_ssa_name_p): New.
7269
        * tree-must-alias.c (find_addressable_vars): Process PHIs.
7270
        * tree-simple.c (is_gimple_min_invariant): Rename from
7271
        is_gimple_const; allow non-static variable addresses; update callers.
7272
        (is_gimple_val): Remove ADDR_EXPR checks.
7273
        * tree-simple.h: Update.
7274
        * tree-ssa-ccp.c (replace_uses_in): Add replaced_address argument.
7275
        (substitute_and_fold): Use that to mark_new_vars_to_rename.
7276
        (fold_indirect_refs_r): New.
7277
        (fold_stmt): Use it.
7278
        * tree-ssa-copyprop.c (copyprop_stmt): Call fold_stmt.
7279
        * tree-ssa-dce.c (NECESSARY): Use asm_written_flag.
7280
        (mark_necessary): Reject DECLs.
7281
        * tree-ssa-live.c (register_ssa_partition): Use phi_ssa_name_p.
7282
        * tree-ssa-pre.c (generate_expr_as_of_bb): Call fold_stmt if we
7283
        replaced with constants.
7284
        * tree-ssa.c (insert_copy_on_edge): Unwrap ADDR_EXPRs to set_is_used.
7285
        (eliminate_build, coalesce_abnormal_edges, coalesce_vars): Use
7286
        phi_ssa_name_p.
7287
 
7288
2003-10-09  Frank Ch. Eigler  
7289
 
7290
        java/12211
7291
        * gimplify.c (gimplify_save_expr): Tolerate void-typed saved
7292
        expressions.
7293
 
7294
2003-10-09  Diego Novillo  
7295
 
7296
        * tree-dfa.c (add_call_clobber_ops): If a variable is read-only,
7297
        add a VUSE operand instead of VDEF.
7298
 
7299
2003-10-08  Jason Merrill  
7300
 
7301
        PR optimization/12525
7302
        * tree-dfa.c (note_addressable): New fn, split out from...
7303
        (add_stmt_operands): Here.
7304
        (get_stmt_operands) : Call it for mem ops.
7305
        * gimplify.c (gimplify_asm_expr): Call parse_input_constraint
7306
        directly.  It's only a mem op if allows_mem is set.
7307
 
7308
2003-10-08  Diego Novillo  
7309
 
7310
        PR/12187
7311
        * tree-dfa.c (add_stmt_operand): Test against current_function_decl
7312
        when checking for global variables.
7313
        (may_access_global_mem_p): Likewise.
7314
        (add_referenced_var): Likewise.
7315
        Consider DECL_NONLOCAL variables call clobbered and used.
7316
        (find_hidden_use_vars): Do not test for DECL_NONLOCAL variables.
7317
        * tree-optimize.c (tree_rest_of_compilation): Test against
7318
        current_function_decl when checking for global variables.
7319
        * tree-ssa-ccp.c (get_default_value): Likewise.
7320
        * tree-ssa-dce.c (need_to_preserve_store): Likewise.
7321
 
7322
2003-10-07  Jason Merrill  
7323
 
7324
        PR optimization/12525
7325
        * gimplify.c (gimplify_asm_expr): If the constraint doesn't allow
7326
        a register, call mark_addressable.  Split an in/out operand that
7327
        does allow a register into separate input and output operands.
7328
 
7329
2003-10-06  Richard Henderson  
7330
 
7331
        * fold-const.c (fold): Fold (T1)((T2)X op Y) into (T1)X op Y,
7332
        for suitable values of T1 & T2.
7333
 
7334
2003-10-06  Andrew Macleod  
7335
 
7336
        * tree-dfa.c (compute_immediate_uses): Add optional callback.
7337
        (compute_immediate_uses_for_phi): Remove unused parameter. Add optional
7338
        callback to determine if usage info should be calculated for variable.
7339
        (compute_immediate_uses_for_stmt): Add optional callback to determine
7340
        if usage info should be calculated for variable.
7341
        * tree-flow.h (compute_immediate_uses): Update prototype.
7342
        * tree-ssa-ccp.c (need_imm_uses_for): New. Callback function passed to
7343
        compute_immediate_uses.
7344
        (initialize): Calculate defaults initially, then build reduced
7345
        immediate use information.
7346
        (get_default_value): Non empty stmt's which are not a PHI_NODE or
7347
        a MODIFY_EXPR default to VARYING.
7348
 
7349
2003-10-06  Andrew Macleod  
7350
 
7351
        * tree-cfg.c (tree_split_edge): Mark edge as FALLTHRU when splitting.
7352
 
7353
2003-10-03  Zdenek Dvorak  
7354
 
7355
        * tree-ssa.c (rewrite_block): Test vars_to_rename instead of
7356
        PHI_ARG_CAPACITY.
7357
        * tree-dfa.c (remove_phi_arg_num): Don't update
7358
        PHI_ARG_CAPACITY.
7359
 
7360
2003-10-01  Richard Henderson  
7361
 
7362
        * c-decl.c (set_decl_nonlocal): New.
7363
        (store_parm_decls): Use it via walk_tree.
7364
 
7365
2003-10-01  Jeff Law  
7366
 
7367
        * tree-ssa-dom.c (cprop_into_stmt): New function extracted from
7368
        optimize_stmt.
7369
        (optimize_stmt): Use cprop_into_stmt.
7370
 
7371
2003-09-30  Richard Henderson  
7372
 
7373
        * function.h (struct function): Add function_end_locus.
7374
        * c-decl.c (finish_function): Set it.
7375
        * tree-optimize.c (tree_rest_of_compilation): Set input_location
7376
        to function_end_locus before expand_function_end.
7377
 
7378
        * tree-optimize.c (optimize_function_tree): Move calls to
7379
        remove_useless_stmts_and_vars and lower_eh_constructs ...
7380
        (tree_rest_of_compilation): ... here.
7381
 
7382
        * c-simplify.c (gimplify_expr_stmt): Don't warn for any statement
7383
        with void result type.
7384
 
7385
2003-09-30  Jeff Law  
7386
 
7387
        * tree-ssa-dom.c (simplify_cond_and_lookup_avail_expr): Fix thinko
7388
        in test for swapping ranges.
7389
 
7390
        * tree-ssa-dom.c (record_range): New function.
7391
        (extract_range_from_cond): Likewise.
7392
        (tree_ssa_dominator_optimize): Initialize the vrp_data varray.
7393
        (optimize_block): Initialize the vrp_variables varray.  Wipe
7394
        appropriate entries from the VRP varrays when done processing a block.
7395
        (get_eq_expr_value): Accept new argument "bb".  Call record_range
7396
        appropriately.  Refactor code to avoid useless work.
7397
        (simplify_cond_and_lookup_avail_expr): Use value range records to
7398
        simplify conditions.
7399
        (simplify_rhs_and_lookup_avail_expr): When simplifying ABS_EXPR,
7400
        DIV_EXPR and MOD_EXPR, use simplify_cond_and_lookup_avail_expr
7401
        to determine the range of the given variable.
7402
 
7403
        * tree-ssa-dom.c (find_equivalent_equality_comparison): Do not
7404
        look through a typecast which narrows a value.
7405
 
7406
2003-09-30  Paul Brook  
7407
 
7408
        * Makefile.in: Add rules for check-gfortran.
7409
 
7410
2003-09-29  Richard Henderson  
7411
 
7412
        * gimplify.c (gimplify_cond_expr): Fix both arms dead return value.
7413
 
7414
2003-09-29  Jeff Law  
7415
 
7416
        * tree-ssa-dom.c (simplify_cond_and_lookup_avail_expr): New function.
7417
        (find_equivalent_equality_comparison): Likewise.
7418
        (optimize_block): Remove code to build a == c equivalence after
7419
        seeing a == b and b == c.  Remove code to walk backwards
7420
        though typecasts to record equivalences and move relevant parts
7421
        into find_equivalent_equality_comparison.
7422
        (optimize_stmt): Call simplify_cond_and_lookup_avail_expr.
7423
 
7424
2003-09-28  Richard Henderson  
7425
 
7426
        * gimplify.c (gimplify_call_expr): Annotate all call_exprs.
7427
        * tree-inline.c (expand_call_inline): Set input_location based
7428
        on EXPR_LOCUS; save and restore input_location around that.
7429
        (walk_tree): Do not set input_location.
7430
 
7431
2003-09-27  Graham Stott  
7432
 
7433
        * expr.c (expand_expr)[CATCH_EXPR]: Fix bogus return value.
7434
 
7435
2003-09-26  Andrew MacLeod  
7436
 
7437
        * tree-ssa-dom.c (struct var_value_d): Remove.
7438
        (const_and_copies): Change to a varray_type.
7439
        (tree_ssa_dominator_optimize): Initialize const_and_copies as a varray.
7440
        (optimize_block): Simply set the value in const_and_copies.
7441
        (dump_dominator_optimization_stats): No hash stats for const_and_copies.
7442
        (record_cond_is_true, record_cond_is_false,
7443
        simplify_rhs_and_lookup_avail_expr, update_rhs_and_lookup_avail_expr):
7444
        Parameter const_and_copies is now a varray_type.
7445
        (var_value_hash, var_value_eq): Remove.
7446
        (get_value_for, set_value_for): Access varray elements.
7447
        (get_eq_expr_value): Parameter const_and_copies is now a varray_type.
7448
 
7449
        * tree-cfg.c (handle_switch_split): Update container of previous stmt.
7450
 
7451
2003-09-25  Daniel Berlin  
7452
 
7453
        * tree-ssa-pre.c (split_critical_edges): New function, temporarily
7454
        disabled until some edge splitting/insertion problems are fixed.
7455
        (opnum_of_ephi): Take an edge argument, constify. Use hash table lookup.
7456
        Update all callers.
7457
        (ephi_pindex_eq): New function.
7458
        (ephi_pindex_hash): New function.
7459
        (ephi_pindex_htab): New variable.
7460
        (add_ephi_pred): Update hash table.
7461
        (expr_phi_insertion): Don't free the bitmap returned by compute_idfs
7462
        anymore.
7463
        (idfs_cache): New variable.
7464
        (compute_idfs): Rewrite to use cache as much as possible, and not
7465
        recompute when we can avoid it.
7466
 
7467
2003-09-25  Daniel Berlin  
7468
 
7469
        * tree-alias-ander.c:  Fixup comment spacing.
7470
        (andersen_op_assign):  Handle >2 operands case.
7471
 
7472
2003-09-24  Steven Bosscher  
7473
 
7474
        * tree-dfa.c (compute_immediate_uses_for): Split up in two
7475
        separate functions, one for PHIs and one for normal statements.
7476
        (compute_immediate_uses_for_phi): New.
7477
        (compute_immediate_uses_for_stmt): New.
7478
 
7479
2003-09-25  Jeff Law  
7480
 
7481
        * tree-ssa-dom.c (optimize_block): When EQ_EXPR_VALUE has the
7482
        form DEST = SRC where both DEST and SRC are SSA_NAMEs also
7483
        record SRC = DEST into the const and copies table.
7484
 
7485
        * tree-ssa-dom.c (optimize_block): Change tests which checked
7486
        for SSA_VAR_P to only allow SSA_NAMEs.
7487
        (get_value_for, set_value_for): Likewise.
7488
        (lookup_avail_expr, get_eq_expr_value): Likewise.
7489
 
7490
2003-09-25  Andrew MacLeod  
7491
 
7492
        * tree-ssa-dce.c (pdom_info, needed_stmts): Remove.
7493
        (NECESSARY): Define.
7494
        (necessary_p): Check bit instead of hash table lookup.
7495
        (clear_necessary): New. Clear necessary bit.
7496
        (mark_necessary): Use bit instead of hash table. No control lookup.
7497
        (mark_tree_necessary): Remove.
7498
        (find_useful_stmts): Clear necessary bit before checking it.
7499
        (stmt_useful_p): Remove GOTO_EXPR case. Check arms of COND_EXPR for
7500
        GOTO. All other control flow stmts are necessary.
7501
        (process_worklist): Dont look for control parents.
7502
        (remove_dead_stmts): No dominattor info is necessary.
7503
        (remove_dead_stmt): Don't need BB any more. Remove COND_EXPR by changing
7504
        the condition to 'if (0)'. Abort on other control flow.
7505
        (tree_ssa_dce): No longer need the hash table.
7506
        (remove_conditional): Remove.
7507
 
7508
2003-09-25  Andreas Schwab  
7509
 
7510
        * tree-flow.h: Declare next_ssa_version.
7511
        * tree-ssa-ccp.c: Remove conflicting declaration.
7512
        * tree-ssa-live.c: Likewise.
7513
        * tree.c (make_ssa_name): Likewise.
7514
 
7515
2003-09-24  Jason Merrill  
7516
 
7517
        * tree.h (DECL_SOURCE_LOCATION): Resurrect.
7518
        (DECL_SOURCE_FILE, DECL_SOURCE_LINE): Likewise.
7519
        (EXPR_LOCUS): Renamed from TREE_LOCUS.  Null for non-exprs.
7520
        (SET_EXPR_LOCUS): New macro.
7521
        (EXPR_FILENAME): Renamed from TREE_FILENAME.
7522
        (EXPR_LINENO): Renamed from TREE_LINENO.
7523
        (struct tree_common): Remove locus field.
7524
        (struct tree_decl): Re-add locus field.
7525
        (struct tree_expr): Add locus field.
7526
        * c-aux-info.c, c-decl.c, coverage.c, c-parse.in, dbxout.c,
7527
        diagnostic.c, dwarf2out.c, expr.c, function.c, gimplify.c,
7528
        integrate.c, print-tree.c, stmt.c, tree.c, tree-cfg.c,
7529
        tree-dump.c, tree-flow-inline.h, config/alpha/alpha.c,
7530
        config/mips/mips.c: Adjust.
7531
 
7532
2003-09-24  Andrew MacLeod  
7533
 
7534
        * tree-ssa-ccp.c (enum latticevalue): Add UNINITIALIZED.
7535
        (const_values, struct value_map_d): Remove hash table structures.
7536
        (value_vector): New array of values.
7537
        (get_value): Use value_vector instead of hash table. Mark inline.
7538
        (visit_phi_node): Ignore arguments if the PHI result is already VARYING.
7539
        (initialize): Initialize value vector instead of hash table.
7540
        (finalize): Free value vector instead of hash table.
7541
        (add_var_to_ssa_edges_worklist): Don't add to worklist if
7542
        DONT_SIMULATE_AGAIN flag is set.
7543
        (value_map_hash, value_map_eq): Delete.
7544
 
7545
2003-09-24  Jeff Law  
7546
 
7547
        * tree-ssa-dom.c (optimize_block): Create infrastructure for
7548
        tracking const_and_copies equivalences which disappear when
7549
        we leave the current block.  Use it for equivalences created
7550
        by EQ_EXPR_VALUE.  Follow use-def chains for EQ_EXPR_VALUE
7551
        equivalences and see if certain NOP_EXPRs can be ignored
7552
        to create a block-local equivalence for const_and_copies.
7553
        (optimize_stmt): Do not get confused by a cast of the return
7554
        value from alloca or the address of a non-weak decl.
7555
 
7556
        * fold-const.c (fold_read_from_constant_string): New function.
7557
        * tree.h (fold_read_from_constant_string): Prototype.
7558
        * expr.c (expand_expr, case INDIRECT_REF):  Use it.
7559
        (expand_expr, case ARRAY_REF): Likewise.  Put checking code
7560
        inside an ENABLE_CHECKING.
7561
        * tree-ssa-ccp.c (fold_stmt): Use fold_read_from_constant_string.
7562
        * tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): Likewise.
7563
 
7564
2003-09-23  Jeff Law  
7565
 
7566
        * tree-ssa-dom.c (optimize_block): Ignore "useless" type
7567
        conversions in SWITCH_COND when creating equivalenecs at
7568
        case labels.
7569
 
7570
2003-09-22  Jeff Law  
7571
 
7572
        * tree-ssa-dom.c (optimize_stmt): Addresses of non-weak symbols
7573
        as well as dynamically allocated stack space are always nonzero.
7574
 
7575
        * tree-cfg.c (handle_switch_split): Properly mark the fallthru
7576
        edge from SRC to DEST with EDGE_FALLTHRU.
7577
 
7578
2003-09-22  Daniel Berlin  
7579
 
7580
        * tree-flow.h (struct bb_ann_d): Add erefs array.
7581
        * tree-ssa-pre.c (handle_bb_creation): Remove ei parameter.
7582
        Update caller.
7583
        (struct expr_info): Remove erefs array.
7584
        (append_eref_to_block): New function.
7585
        (clear_all_eref_arrays): Ditto.
7586
        (expr_phi_insertion): Use append_eref_to_block.
7587
        (insert_occ_in_preorder_dt_order_1): Ditto.
7588
        (subst_phis): Only copy expression, not the containing EUSE/EPHI.
7589
        Update all callers to reflect this.
7590
        (compute_will_be_avail): Update for per-block eref array.
7591
        (handle_bb_creation): Ditto.
7592
        (pre_expression): Ditto.
7593
        (tree_perform_ssapre): Clear eref arrays when done with expression.
7594
 
7595
2003-09-22  Diego Novillo  
7596
 
7597
        * tree-cfg.c (dump_tree_bb): Remove superlfuous newlines.
7598
 
7599
2003-09-21  Diego Novillo  
7600
 
7601
        * tree-dfa.c (compute_alias_sets): Use TDI_alias instead of
7602
        TDI_ssa.
7603
        * tree-dump.c (dump_files): Add enties for TDI_alias, TDI_ssa1,
7604
        TDI_dom1, TDI_ssa2, TDI_dce1, TDI_ssa3, TDI_dom2, TDI_ssa4,
7605
        TDI_ssa5 and TDI_dce2.
7606
        Remove entries for TDI_ssa, TDI_dom and TDI_dce.
7607
        * tree.h (enum tree_dump_index): Similarly.
7608
        (TDF_ALIAS): Remove.
7609
        (TDF_VOPS): Change value.
7610
        * doc/invoke.texi (-fdump-tree-alias): Document.
7611
        * tree-flow.h (tree_warn_uninitialized): Remove unused variable.
7612
        (rewrite_into_ssa): Add enum tree_dump_index argument.  Update all
7613
        callers.
7614
        (rewrite_out_of_ssa): Likewise.
7615
        (tree_perform_ssa_pre): Likewise.
7616
        (tree_ssa_dominator_optimize): Likewise.
7617
        (tree_ssa_dce): Likewise.
7618
        (tree_ssa_copyprop): Likewise.
7619
        (tree_ssa_ccp): Likewise.
7620
        Add sbitmap argument.
7621
        (tree_compute_must_alias): Likewise.
7622
        (mark_new_vars_to_rename): Declare.
7623
        * tree-must-alias.c (tree_compute_must_alias): Do not call
7624
        rewrite_into_ssa.
7625
        Remove local vars_to_rename.  Use new argument instead.
7626
        * tree-optimize.c (optimize_function_tree): Re-write optimization
7627
        ordering to support passes that need the SSA form updated.
7628
        Call tree_ssa_dominator_optimize.
7629
        Re-arrange optimization ordering.
7630
        * tree-ssa-ccp.c (substitute_and_fold): Take new argument
7631
        vars_to_rename.
7632
        Call mark_new_vars_to_rename.
7633
        (visit_phi_node): Move variable 'val' into the right scope.
7634
        (initialize): Move call dump_begin ...
7635
        (tree_ssa_ccp): ... here.
7636
        * tree-ssa-dom.c (mark_new_vars_to_rename): Declare extern.
7637
        Make sure that variables in virtual operands aren't marked
7638
        unnecessarily.
7639
        * tree-ssa.c (rewrite_into_ssa): Do not call
7640
        tree_ssa_dominator_optimize.
7641
 
7642
2003-09-21  Diego Novillo  
7643
 
7644
        * tree-ssa-dce.c (dom_info): Remove unused variable.
7645
        * tree-ssa-dom.c (tree_ssa_dominator_optimize): If the CFG has been
7646
        altered, call cleanup_tree_cfg.
7647
        Call cleanup_tree_cfg before returning.
7648
        * tree-ssa-pre.c (tree_perform_ssapre): Call get_stmt_operands
7649
        before processing the statement.
7650
        * tree-ssa-dom.c (thread_edge): Remove attribute EDGE_FALLTHRU from
7651
        edge.
7652
 
7653
2003-09-21  Jeff Law  
7654
 
7655
        * tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): Break out of
7656
        optimize_stmt.  Follow the def-use chains back for certain expressions
7657
        to see if we can simplify the RHS of the current expression based
7658
        on earlier expressions.
7659
 
7660
        * tree-ssa-dom.c (optimize_block): Rework code to propagate values
7661
        into PHI nodes to be more efficient.
7662
 
7663
2003-09-20  Andrew MacLeod  
7664
 
7665
        * tree-flow.h (struct dataflow_d): Remove reaching fields, add 2 element
7666
        vector of trees.
7667
        * tree-flow-inline.h (immediate_uses): Rename to get_immediate_uses,
7668
        return a dataflow object.
7669
        (reaching_defs): Remove until needed.
7670
        (num_immediate_uses): New. Return number of immediate uses.
7671
        (immediate_use): New. Return a specified immediate use.
7672
        * tree-dfa.c (add_immediate_use): Use new fields.
7673
        (dump_immediate_uses_for): Use new interface.
7674
        (create_phi_node): Chain to start of list.
7675
        * tree-ssa-ccp.c (add_var_to_ssa_edges_worklist): Use new interface.
7676
        * tree-ssa.c (compute_global_livein): Loop interchange.
7677
 
7678
2003-09-18  Jeff Law  
7679
 
7680
        * tree-ssa-dom.c (optimize_stmt): Allow optimizing the RHS of a
7681
        MODIFY_EXPR even if we can't record any equivalences created by
7682
        the MODIFY_EXPR.  Move code to simplify ABS_EXPR, TRUNC_DIV_EXPR
7683
        and TRUNC_MOD_EXPR to an earlier position.
7684
 
7685
2003-09-19  Andrew MacLeod  
7686
 
7687
        * tree-ssa-ccp.c (cfg_edges): Rename to cfg_blocks.
7688
        (cfg_blocks_num, cfg_blocks_head, cfg_blocks_tail): New. Queue markers.
7689
        (bb_in_list): New. Vector indicating if a BB is in the cfg_blocks list.
7690
        (tree_ssa_ccp): Use new routines.
7691
        (add_control_edge): Add to cfg_blocks list.
7692
        (initialize): Initialize new variables.
7693
        (finalize): Free allocations.
7694
        (cfg_blocks_empty): New. Is cfg_blocks queue list.
7695
        (cfg_blocks_add): New. Add a basic block to cfg_blocks list.
7696
        (cfg_blocks_pop): New. Get a basic_block from the list.
7697
 
7698
2003-09-18  Richard Henderson  
7699
 
7700
        * tree-cfg.c (struct rusv_data): Add may_throw, may_branch.
7701
        (remove_useless_stmts_and_vars_1): Set them.
7702
        (remove_useless_stmts_and_vars_goto): Likewise.
7703
        (remove_useless_stmts_and_vars_tf): Transform to compound_expr
7704
        if only fallthrough.
7705
        (remove_useless_stmts_and_vars_tc): Kill region if nothrow.
7706
        Detect catch regions that don't propagate exceptions.
7707
        (remove_useless_stmts_and_vars): Zero entire data struct.
7708
 
7709
2003-09-18  Richard Henderson  
7710
 
7711
        * tree-eh.c (lower_try_finally_dup_block): New.
7712
        (honor_protect_cleanup_actions, lower_try_finally_copy): Use it.
7713
 
7714
2003-09-18  Richard Henderson  
7715
 
7716
        * tree-cfg (remove_useless_stmts_and_vars_cond,
7717
        remove_useless_stmts_and_vars_tf,
7718
        remove_useless_stmts_and_vars_tc,
7719
        remove_useless_stmts_and_vars_bind,
7720
        remove_useless_stmts_and_vars_goto): Break out of ...
7721
        (remove_useless_stmts_and_vars_1): ... here.  Rename to _1;
7722
        take and use struct rusv_data.
7723
        (remove_useless_stmts_and_vars): New.  Loop until no change.
7724
        * tree-flow.h (remove_useless_stmts_and_vars): Update decl.
7725
        * tree-ssa.c (rewrite_out_of_ssa): Don't loop here.
7726
 
7727
2003-09-18  Richard Henderson  
7728
 
7729
        * tree-pretty-print.c (dump_generic_node): Don't double indent asms.
7730
 
7731
2003-09-18  Richard Henderson  
7732
 
7733
        * tree-eh.c: Include langhooks.h, remove errors.h.
7734
        (decide_copy_try_finally): Use estimate_num_insns to choose
7735
        between copy and switch implementations.
7736
 
7737
        * c-common.c (c_estimate_num_insns): Take an expr, not a decl.
7738
        * tree-inline.c (limits_allow_inlining): Pass it the body of the decl.
7739
 
7740
2003-09-18  Jeff Law  
7741
 
7742
        * tree-ssa-dom.c (lookup_avail_expr): New argument which indicates
7743
        if the expression should be entered into the hash table.  All
7744
        callers updated.
7745
        (update_rhs_and_lookup_avail_expr): New function factored out
7746
        of optimize_stmt.
7747
 
7748
        * tree.h (commutative_tree_code, associative_tree_code): Declare
7749
        * tree.c (commutative_tree_code, associative_tree_code): New
7750
        functions.
7751
        (iterative_hash_expr): Use commutative_tree_code.
7752
        * fold-const.c (operand_equal_p): Use commutative_tree_code
7753
        rather than inlining the communitivy check.
7754
        (fold, nondestructive_fold_binary_to_constant): Similarly.
7755
 
7756
2003-09-18  Diego Novillo  
7757
 
7758
        * Makefile.in (tree-eh.o): Add dependency on errors.h
7759
        * tree-eh.c: Include errors.h
7760
 
7761
2003-09-17  Richard Henderson  
7762
 
7763
        * tree-cfg.c (remove_useless_stmts_and_vars): Revert last change.
7764
        * tree-flow.h, tree-ssa.c: Likewise.
7765
 
7766
2003-09-17  Richard Henderson  
7767
 
7768
        * tree-eh.c (decide_copy_try_finally): Remove forgotten debug code.
7769
 
7770
2003-09-17  Daniel Berlin  
7771
 
7772
        * tree-ssa-pre.c (pick_ssa_name): New function.
7773
        (code_motion): Use it.
7774
 
7775
2003-09-17  Richard Henderson  
7776
 
7777
        * tree-eh.c: New file.
7778
        * Makefile.in (OBJS-common): Add it.
7779
        (tree-eh.o): New.
7780
        * calls.c (emit_call_1): New argument for full call expr.
7781
        Check with lookup_stmt_eh_region to set REG_EH_REGION.
7782
        (expand_call): Likewise for tail-calls.
7783
        * except.c (struct eh_region): Add tree_label.
7784
        (gen_eh_region, gen_eh_region_cleanup, gen_eh_region_try,
7785
        gen_eh_region_catch, gen_eh_region_allowed,
7786
        gen_eh_region_must_not_throw, get_eh_region_number,
7787
        get_eh_region_may_contain_throw, get_eh_region_tree_label,
7788
        set_eh_region_tree_label, expand_resx_expr): New.
7789
        (expand_eh_region_start, expand_start_catch): Use them.
7790
        (expand_end_catch): Tidy.
7791
        (note_eh_region_may_contain_throw): Take region argument.
7792
        (note_current_region_may_contain_throw): New.
7793
        (get_exception_filter): Export.
7794
        (collect_eh_region_array): Export.
7795
        (remove_unreachable_regions): Check ERT_TRY based on reachability
7796
        of catches, not reachability of continue_label.  Never remove
7797
        ERT_MUST_NOT_THROW regions.
7798
        (collect_rtl_labels_from_trees): New.
7799
        (convert_from_eh_region_ranges): Use it.
7800
        (connect_post_landing_pads): Handle dying cleanups.
7801
        (struct reachable_info): Add callback data.
7802
        (add_reachable_handler): Invoke the callback.
7803
        (foreach_reachable_handler): New.
7804
        (reachable_handlers): Use it.
7805
        (arh_to_landing_pad, arh_to_label): New.
7806
        (can_throw_internal_1): Split out from can_throw_internal.
7807
        (can_throw_external_1): Similarly.
7808
        * except.h: Update.
7809
        * expr.c (expand_expr): Handle RESX_EXPR, FILTER_EXPR.
7810
        * gimplify.c (gimplify_modify_expr): Use tree_could_trap_p.
7811
        * stmt.c (using_eh_for_cleanups_p): Export.
7812
        (expand_return): Allow any typed rhs.
7813
        * timevar.def (TV_TREE_EH): New.
7814
        * tree-cfg.c (eh_stack): Kill.
7815
        (build_tree_cfg): Don't set it.  Kill code to handle EH.
7816
        (could_trap_p): Move to tree-eh.c as tree_could_trap_p.
7817
        (get_eh_region_type, make_try_expr_blocks, make_catch_expr_blocks,
7818
        make_eh_filter_expr_blocks, try_finallys): Kill.
7819
        (make_edges): Kill code to handle EH.
7820
        (make_ctrl_stmt_edges): Kill TRY_FINALLY_EXPR, CATCH_EXPR,
7821
        EH_FILTER_EXPR.  Handle RESX_EXPR.
7822
        (make_call_expr_edges): Kill.
7823
        (make_exit_edges): Use make_eh_edges.
7824
        (label_to_block): New.
7825
        (make_goto_expr_edges): Use it.
7826
        (is_ctrl_stmt): Add RESX_EXPR.
7827
        (is_ctrl_altering_stmt): Restructure.  Use tree_can_throw_internal.
7828
        (last_exec_block, compute_reachable_eh): Kill.
7829
        * tree-dfa.c (get_stmt_operands): Add RESX_EXPR.
7830
        (get_expr_operands): Add FILTER_EXPR.
7831
        * tree-dump.c (dump_files): Add tree-eh.
7832
        * tree-flow.h (struct stmt_ann_d): Kill reachable_exception_handlers.
7833
        (label_to_block, lower_eh_constructs, make_eh_edges,
7834
        tree_could_trap_p, tree_could_throw_p, tree_can_throw_internal,
7835
        tree_can_throw_external): Declare.
7836
        * tree-optimize.c (optimize_function_tree): Call lower_eh_constructs.
7837
        (tree_rest_of_compilation): Save tree for inlining.
7838
        * tree-pretty-print.c (dump_generic_node): Handle FILTER_EXPR,
7839
        RESX_EXPR.
7840
        * tree-simple.c (is_gimple_stmt): Add RESX_EXPR.
7841
        (is_gimple_val): Add FILTER_EXPR.
7842
        * tree-ssa-dce.c (stmt_useful_p): Restructure.  Add lhs of
7843
        EXC_PTR_EXPR or FILTER_EXPR.
7844
        * tree.def (FILTER_EXPR, RESX_EXPR): New.
7845
        * tree.h (enum tree_dump_index): Add TDI_eh.
7846
 
7847
2003-09-17  Richard Henderson  
7848
 
7849
        * tree.c (tsi_link_before): Remove unnecessary parens.
7850
        (tsi_link_chain_before, tsi_delink): Likewise.
7851
        (tsi_link_after): Accept the case if the iterator points
7852
        to a NULL node; treat it as an empty list.
7853
        (tsi_link_chain_after): Likewise.  Update iterator properly
7854
        for TSI_CHAIN_END.
7855
 
7856
2003-09-17  Richard Henderson  
7857
 
7858
        * tree-inline.c (debug_find_tree_1, debug_find_tree): New.
7859
 
7860
2003-09-17  Richard Henderson  
7861
 
7862
        * tree-cfg.c (struct rusv_data): New.
7863
        (remove_useless_stmts_and_vars_1): Rename from
7864
        remove_useless_stmts_and_vars.  Use rusv_data.  Handle goto-next
7865
        via remembering the last goto seen, and zapping it when appropriate.
7866
        (remove_useless_stmts_and_vars): New.  Loop until done.
7867
        * tree-flow.h (remove_useless_stmts_and_vars): Update decl.
7868
        * tree-optimize.c (optimize_function_tree): Don't cache fnbody.
7869
        Dump data after remove_useless_stmts_and_vars.
7870
        * tree-ssa.c (rewrite_out_of_ssa): Kill loop around
7871
        remove_useless_stmts_and_vars.
7872
        * tree-dump.c (dump_files): Add .useless.
7873
        * tree.h (enum tree_dump_index): Add TDI_useless.
7874
 
7875
2003-09-17  Diego Novillo  
7876
 
7877
        * pretty-print.c (pp_write_text_to_stream): Export.
7878
        * pretty-print.h (pp_write_text_to_stream): Declare.
7879
        * tree-pretty-print.c (print_generic_stmt): Flush to file.
7880
        (dump_generic_node): Call pp_write_text_to_stream.
7881
        (maybe_init_pretty_print): Take file argument; associate the
7882
        stream with the buffer.
7883
 
7884
2003-09-17  Jeff Law  
7885
 
7886
        * tree-ssa-ccp.c (ccp_fold): If the return value has the wrong
7887
        type, try to convert it to the proper type rather than failing.
7888
 
7889
        * tree-ssa-dom.c (optimize_stmt): Note that the statement is
7890
        modified, even if we just change the virtual operands.  If
7891
        the statement was modified by const/copy propagation, then
7892
        set may_have_exposed_new_symbols.
7893
 
7894
2003-09-17  Diego Novillo  
7895
 
7896
        * tree-dfa.c (find_vars_r): Do not consider 'void *' pointers as
7897
        dereferenced when scanning function call arguments.
7898
        * tree-flow-inline.h (may_propagate_copy): Block propagation of
7899
        pointers when they have different memory tags.
7900
        * tree-ssa-copyprop.c (propagate_copy): When copy propagating
7901
        pointers, abort if the two pointers don't have identical memory
7902
        tags.
7903
 
7904
2003-09-16  Jeff Law  
7905
 
7906
        * tree-ssa-ccp.c (visit_stmt): Do not set DONT_SIMULATE_AGAIN
7907
        just because a statement as virtual definitions.
7908
        (likely_value): A CALL_EXPR is assumed to return a VARYING
7909
        result, regardless of its operands.
7910
 
7911
2003-09-15  Jason Merrill  
7912
 
7913
        * tree-simple.c (is_gimple_val): Allow addresses of all decls.
7914
        (is_gimple_const): Allow addresses of all non-weak statics.
7915
        * tree-ssa-ccp.c (fold_stmt): Return bool.
7916
        * tree-flow.h: Adjust prototype.
7917
        * tree-ssa-dom.c (optimize_stmt): If folding changed stuff, we
7918
        need to recalculate the vops.
7919
 
7920
2003-09-13  Diego Novillo  
7921
 
7922
        Fix PR optimization/12268
7923
        * tree-dfa.c (add_referenced_var): Call-clobbered pointers may
7924
        point to global memory.
7925
 
7926
2003-09-13  Jason Merrill  
7927
 
7928
        * c-common.c (c_apply_type_quals_to_decl): Unset TREE_READONLY for
7929
        types with constructors.
7930
        Remove superfluous references to TREE_TYPE (decl).
7931
 
7932
2003-09-13  Diego Novillo  
7933
 
7934
        * opts.c (decode_options): Enable must-alias optimization by default.
7935
        * tree-dfa.c (get_expr_operands): Always call add_stmt_operand when
7936
        dealing with ADDR_EXPR nodes.
7937
        (add_stmt_operand): If the variable has an alias set
7938
        of size zero, abort.
7939
        Call get_base_symbol() to retrieve the variable from an ADDR_EXPR
7940
        node.
7941
        (compute_alias_sets): Deep copy the aliases array when triggering
7942
        the alias grouping heuristic.
7943
        Don't group aliases if -ftree-must-alias is given.
7944
        * tree-must-alias.c (tree_compute_must_alias): Call
7945
        dump_referenced_vars when doing detailed dumps.
7946
        Rename promoted_vars to vars_to_rename.  Update all users.
7947
        (find_addressable_vars): Always mark statements modified.
7948
        (promote_var): Also mark aliases of promoted variable to be
7949
        renamed.
7950
        Call find_variable_in and remove_element_from to update varrays for
7951
        call-clobbered variables and alias sets.
7952
        (find_variable_in): New local function.
7953
        (remove_element_from): New local function.
7954
        * varray.c (varray_copy): New function.
7955
        * varray.h (varray_copy): Declare.
7956
 
7957
2003-09-13  Diego Novillo  
7958
 
7959
        * tree-flow-inline.h (is_optimizable_addr_expr): Remove.  Update
7960
        all users.
7961
        * tree-ssa-dom.c (optimize_stmt): Do not propagate SSA names from
7962
        redundant expressions across abnormal edges.
7963
 
7964
2003-09-13  Zdenek Dvorak  
7965
 
7966
        * tree-cfg.c (remove_unreachable_blocks): Clean up.
7967
        (debug_tree_bb_n): New.
7968
        (is_ctrl_structure): Remove LOOP_EXPR.
7969
        * tree-flow.h (debug_tree_bb_n): Declare.
7970
 
7971
2003-09-12  Andrew Macleod  
7972
 
7973
        * tree-ssa-live.c (calculate_live_on_entry): Use default_def to add
7974
        addition checks to live on entry calculations.
7975
        * tree-ssa.c (print_exprs_edge): New debug output function.
7976
        (coalesce_abnormal_edges): Add basic block information to output.
7977
        (coalesce_ssa_name): Use default_def instead of trying to compute live
7978
        on entry variables.
7979
 
7980
2003-09-12  Diego Novillo  
7981
 
7982
        * tree-optimize.c (tree_rest_of_compilation): Set TREE_ASM_WRITTEN
7983
        for functions that have errors.
7984
 
7985
2003-09-12  Diego Novillo  
7986
 
7987
        * tree-ssa-pre.c (graph_dump_file, graph_dump_flags): Remove
7988
        unused variables.
7989
 
7990
2003-09-11  Daniel Berlin  
7991
 
7992
        * tree-ssa-pre.c (reset_down_safe): Make test less conservative.
7993
        (cba_search_start_from): Start from abnormal edge arguments, too.
7994
        (cba_search_continue_from_to): Ditto here.
7995
 
7996
2003-09-11  Daniel Berlin  
7997
 
7998
        * tree-ssa-pre.c: s/#if ENABLE_CHECKING/#ifdef ENABLE_CHECKING/g.
7999
        Add more comments to DFS searching functions.
8000
        (cba_search_reach_from_to): Remove empty function.
8001
        (code_motion): Remove #if 0'd code.
8002
        (pre_expression): Ditto.
8003
        * tree.h (tree_dump_index): Remove TDI_predot.
8004
        * tree-dump.c (dump_files): Ditto.
8005
 
8006
2003-09-11  Jason Merrill  
8007
 
8008
        Make EDGE_FALLTHRU meaningful for tree-cfg.
8009
        * tree-cfg.c (make_edges): Set EDGE_FALLTHRU on fallthrough edge.
8010
        (make_exit_edges): Likewise.
8011
        (make_ctrl_stmt_edges): Don't set EDGE_FALLTHRU on edges into a
8012
        control structure.
8013
        (handle_switch_fallthru): Clear EDGE_FALLTHRU after inserting a goto.
8014
        (find_insert_location): Only insert after a CALL_EXPR or MODIFY_EXPR.
8015
        (bsi_insert_on_edge_immediate): Count outgoing abnormal edges.
8016
        Insert before all control stmts.
8017
        (bsi_link_after): Handle a block with nops after the last stmt.
8018
 
8019
        Rename some things to clarify difference between "control structures"
8020
        (i.e. COND_EXPR) and "control statements" (also GOTO_EXPR).
8021
        * basic-block.h (BB_CONTROL_STRUCTURE): Rename from BB_CONTROL_EXPR.
8022
        * tree-cfg.c (REMOVE_NON_CONTROL_STRUCTS): Rename from
8023
        REMOVE_NON_CONTROL_STMTS.
8024
        (REMOVE_CONTROL_STRUCTS): Rename from REMOVE_CONTROL_STMTS.
8025
        (make_ctrl_stmt_edges): Move GOTO_EXPR/RETURN_EXPR handling here...
8026
        (make_exit_edges): ...from here.
8027
        (is_ctrl_altering_stmt): Don't accept GOTO_EXPR/RETURN_EXPR.
8028
        (is_ctrl_structure): Renamed from old is_ctrl_stmt.
8029
        (is_ctrl_stmt): New fn.
8030
        (bsi_move_to_bb_end): Use it.
8031
        (stmt_starts_bb_p): Use is_ctrl_stmt and is_ctrl_altering_stmt.
8032
        * tree-flow.h: Add prototype.
8033
        * tree-ssa-ccp.c, tree-ssa-dom.c: Update for name changes.
8034
 
8035
2003-09-10  Daniel Berlin  
8036
 
8037
        * tree-ssa-pre.c (ephi_has_bottom): Remove dead function.
8038
        (ephi_has_unsafe_arg): New function.
8039
        (compute_down_safety): Use it.
8040
        (reset_down_safe): Continue search on abnormal edges, too.
8041
 
8042
2003-09-10  Jason Merrill  
8043
 
8044
        * gimplify.c (gimplify_asm_expr): Add post_p parm.
8045
        (get_initialized_tmp_var): Add post_p parm.
8046
        (internal_get_tmp_var): Likewise.
8047
        (gimplify_expr, get_formal_tmp_var): Pass it.
8048
        * c-simplify.c (gimplify_decl_stmt): Pass it.
8049
        * tree-simple.h: Adjust prototype.
8050
 
8051
        * tree-cfg.c (make_call_expr_edges): Break out from...
8052
        (make_exit_edges): ...here.  Check TREE_NOTHROW.
8053
        (is_ctrl_altering_stmt): Check TREE_NOTHROW.
8054
 
8055
2003-09-10  Paul Brook  
8056
 
8057
        * gimplify.c (gimplify_compound_lval): Treat REALPART_EXPR and
8058
        IMAGPART_EXPR the same as COMPONENT_REF.
8059
        * tree-simple.c (is_gimple_addr_expr_arg): Ditto.
8060
        (is_gimple_lvalue): Remove REALPART_EXPR and IMAGPART_EXPR.
8061
 
8062
2003-09-10  Diego Novillo  
8063
 
8064
        * c-pretty-print.c (decl_name_str): New local function.
8065
        (pp_c_direct_declarator): Call it.
8066
        (pp_c_primary_expression): Call it.
8067
        (pp_c_id_expression): Call it.
8068
        (pp_c_statement): Call it.
8069
 
8070
2003-09-10  Diego Novillo  
8071
 
8072
        * tree-pretty-print.c (dump_generic_node): Change string used to
8073
        display _DECL nodes with no DECL_NAME.
8074
 
8075
2003-09-10  Diego Novillo  
8076
 
8077
        * tree-dfa.c (add_referenced_var): Handle cases when argument
8078
        walk_state is NULL.
8079
        (add_referenced_tmp_var): New function.
8080
        * tree-flow.h (add_referenced_tmp_var): Declare it.
8081
        * tree-ssa-pre.c (pre_expression): Call it.
8082
        * tree-ssa-live.c (create_ssa_var_map): Add checking for variables
8083
        being in real and virtual operands.
8084
 
8085
2003-09-01  Zdenek Dvorak  
8086
            Jeff Law  
8087
 
8088
        * tree-flow.h (remove_unreachable_blocks): Declare.
8089
        * tree-cfg.c (remove_unreachable_blocks): Export. Return true
8090
        if blocks were removed.
8091
        * tree-ssa-dom.c (optimize_block, optimize_stmt): Record whether
8092
        the cfg has changed.  Schedule jump threading.  If a block
8093
        has more than one pred, then do not record equivalences created
8094
        by a controlling COND_EXPR.
8095
        (edges_to_redirect, redirection_targets): New variables.
8096
        (thread_edge): Split out of optimize_block.
8097
        (tree_ssa_dominator_optimize); Remove unreachable blocks and
8098
        recompute dominator tree when the cfg changes.
8099
 
8100
2003-09-07  Steven Bosscher  
8101
 
8102
        * c-tree.h: Don't declare c_genericize, it's already
8103
        declared in c-common.h.
8104
 
8105
2003-09-07  Steven Bosscher  
8106
 
8107
        Fix PR optimization/12198
8108
        * tree-cfg.c (value_matches_some_label): Handle integer
8109
        case ranges.
8110
 
8111
2003-09-06  Zdenek Dvorak  
8112
 
8113
        * tree-iterator.h (tsi_iterator_update): Added TSI_CHAIN_START,
8114
        TSI_CHAIN_END, TSI_CONTINUE_LINKING and comments.
8115
        (tsi_link_chain_before, tsi_link_chain_after): Declare.
8116
        * tree.c (tsi_link_chain_before, tsi_link_chain_after): New.
8117
        (tsi_link_before, tsi_link_after): Handle new TSI_...
8118
        positions.
8119
 
8120
2003-09-06  Diego Novillo  
8121
 
8122
        * varray.c (element): Add entry for 'tree *'.
8123
        * varray.h (enum varray_data_enum): Add VARRAY_DATA_TREE_PTR.
8124
        (union varray_data_tag): Add entry for 'tree *'.
8125
        (VARRAY_TREE_PTR_INIT): Define.
8126
        (VARRAY_TREE_PTR): Define.
8127
        (VARRAY_PUSH_TREE_PTR): Define.
8128
        (VARRAY_TOP_TREE_PTR): Define.
8129
        * tree-cfg.c: Replace uses of VARRAY_GENERIC_PTR with
8130
        VARRAY_TREE_PTR when accessing operand arrays.
8131
        * tree-ssa-ccp.c: Likewise.
8132
        * tree-ssa-copyprop.c: Likewise.
8133
        * tree-ssa-dce.c: Likewise.
8134
        * tree-ssa-dom.c: Likewise.
8135
        * tree-ssa-live.c: Likewise.
8136
        * tree-ssa-pre.c: Likewise.
8137
        * tree-dfa.c: Likewise.
8138
        * tree-ssa.c: Likewise.
8139
        * tree-flow.h (struct operands_d): Remove 'skip' GC markers from
8140
        all fields.
8141
        (struct dataflow_d): Likewise.
8142
 
8143
2003-09-05  Diego Novillo  
8144
 
8145
        * tree-dfa.c (find_referenced_vars): Re-enable .GLOBAL_VAR
8146
        optimization.
8147
 
8148
2003-09-05  Daniel Berlin  
8149
 
8150
        * tree.h (tree_eref_common): Make stmt a tree, not a tree *.
8151
        * tree-ssa-pre.c: Transform all tree *'s to tree.
8152
 
8153
2003-09-05  Paul Brook  
8154
 
8155
        * tree.h (enum tree_index): Delete TI_SIGNED_SIZE_TYPE here.
8156
        (signed_size_type_node): No longer a member of global_trees.
8157
        * c-common.h (enum c_tree_index): New member CTI_SIGNED_SIZE_TYPE.
8158
        (signed_size_type_node): Moved, now a member of c_global_trees.
8159
 
8160
2003-09-05  Diego Novillo  
8161
 
8162
        * tree-dfa.c (find_referenced_vars): Temporarily disable
8163
        .GLOBAL_VAR optimization.
8164
 
8165
2003-09-04  Daniel Berlin  
8166
 
8167
        * tree-alias-common.c:  Add overview.
8168
        * tree-alias-ander.c: Add overview and more specific comments on what
8169
        each function does.
8170
 
8171
2003-09-04  Diego Novillo  
8172
 
8173
        * tree-optimize.c (tree_rest_of_compilation): Return if errorcount
8174
        or sorrycount are non-zero.
8175
 
8176
2003-09-04  Diego Novillo  
8177
 
8178
        * tree-cfg.c (cleanup_tree_cfg): Traverse basic blocks
8179
        with FOR_EACH_BB.
8180
        (remove_useless_stmts_and_vars): Likewise.
8181
        * tree-ssa-dom.c (tree_ssa_dominator_optimize): Likewise.
8182
        * tree-ssa.c (rewrite_into_ssa): Likewise.
8183
        * tree-dfa.c (remove_all_phi_nodes_for): Make sure that the new
8184
        list of PHI nodes is NULL-terminated.
8185
        Add sanity checks to make sure all the PHI nodes for variables to
8186
        rename are gone.
8187
 
8188
2003-09-04  Diego Novillo  
8189
 
8190
        * tree-dfa.c (struct walk_state): Add field 'num_calls'.
8191
        (add_call_clobber_ops): New local function.
8192
        (add_call_read_ops): New local function.
8193
        (get_expr_operands): Call them.
8194
        (add_stmt_operand): Call-clobbered variables are always added to
8195
        virtual operands.
8196
        (find_referenced_vars): If the number of call-clobbered variables
8197
        and number of call sites is larger than a certain threshold, group
8198
        all call-clobbered variables under .GLOBAL_VAR.
8199
        (find_vars_r): Count the number of call sites.
8200
        Don't add .GLOBAL_VAR to the list of referenced variables.
8201
        (add_referenced_var): If the addressable variable is an array,
8202
        register alias set of the type of the elements, not the type of the
8203
        array.
8204
        * tree-ssa-dom.c (mark_new_vars_to_rename): Rename from
8205
        find_new_vars_to_rename.  Update all users.
8206
        Before scanning the statement for new operands, mark the existing
8207
        virtual operands to be renamed again.
8208
        (optimize_stmt): Also check for newly exposed variables when doing
8209
        redundancy elimination.
8210
        * tree-ssa.c (rewrite_into_ssa): Don't abort when rename_count is
8211
        greater than 2.  Simply stop trying at 3.
8212
        (prepare_operand_for_rename): New function.
8213
        (mark_def_sites): Call it.
8214
        (rewrite_stmt): Don't check if the operand is an SSA_NAME before
8215
        calling rewrite_operand.
8216
        (rewrite_operand): Don't abort if the operand was already an
8217
        SSA_NAME.  Ignore it.
8218
 
8219
2003-09-03  Richard Henderson  
8220
 
8221
        * tree-optimize.c (set_save_expr_context, clear_decl_rtl,
8222
        tree_rest_of_compilation): Merge from mainline new file.
8223
        * Makefile.in (tree-optimize.o): Update.
8224
        * c-semantics.c (expand_stmt_toplev): New.
8225
        * c-common.h (expand_stmt_toplev): Declare.
8226
        * c-lang.c, objc/objc-lang.c (LANG_HOOKS_RTL_EXPAND_STMT): Use it.
8227
 
8228
2003-09-03  Richard Henderson  
8229
 
8230
        * gimplify.c (gimplify_switch_expr): Leave the outermost cast
8231
        as part of the switch condition.
8232
 
8233
2003-09-02  Diego Novillo  
8234
 
8235
        * Makefile.in (tree.o): Add dependency on $(BASIC_BLOCK_H) and
8236
        $(TREE_FLOW_H)
8237
        * tree.c: Include basic-block.h and tree-flow.h
8238
        (tsi_link_after): Adjust basic block tree pointers when inserting a
8239
        new COMPOUND_EXPR.
8240
 
8241
2003-09-02  Richard Henderson  
8242
 
8243
        * c-decl.c (finish_function): Fix misapplied patch.  Don't
8244
        free_after_parsing or free_after_compilation.  For real this time.
8245
 
8246
2003-09-01  Daniel Berlin  
8247
 
8248
        * tree-ssa-pre.c (finalize_1):  Remove unnecessary call to
8249
        insert_euse_in_preorder_dt_order.
8250
        (code_motion): Ditto.
8251
        (pre_expression): Ditto.
8252
 
8253
2003-09-01  Zdenek Dvorak  
8254
            Jeff Law  
8255
 
8256
        * basic-block.h (BB_LOOP_CONTROL_EXPR): Remove.
8257
        * c-simplify.c (gimplify_c_loop): Create loops in a better shape.
8258
        * cfgloop.h (create_loop_notes): Declare.
8259
        * cfgloopmanip.c (create_loop_notes): New.
8260
        * explow.c (probe_stack_range): Don't produce loop notes when we
8261
        recreate them.
8262
        * expr.c (emit_block_move_via_loop): Ditto.
8263
        * gimplify.c (build_and_jump): Export.
8264
        (gimplify_loop_expr): Don't produce LOOP_EXPRs.
8265
        * toplev.c (rest_of_compilation): Recreate loop notes if needed.
8266
        * tree-cfg.c (make_loop_expr_edges, make_loop_expr_blocks): Removed.
8267
        (find_contained_blocks, make_ctrl_stmt_edges,
8268
        remove_useless_stmts_and_vars, stmt_ends_bb_p, bsi_insert_before,
8269
        find_insert_location, bsi_insert_on_edge_immediate,
8270
        merge_tree_blocks): Remove handling of LOOP_EXPRs.
8271
        (remove_stmt): Remove handling of BB_LOOP_CONTROL_EXPR.
8272
        (find_taken_edge): Remove comment on LOOP_EXPRs.
8273
        (dump_tree_bb): Don't dump loop-related information.
8274
        (is_loop_stmt, is_latch_block_for): Removed.
8275
        (find_insert_location): Handle TRY_CATCH and TRY_FINALLY.
8276
        * tree-flow.h (is_loop_stmt, loop_body, set_loop_body,
8277
        is_latch_block_for): Removed.
8278
        * tree-dfa.c (get_stmt_operands): Don't handle LOOP_EXPRs.
8279
        * tree-simple.c (is_gimple_stmt): Remove handling of LOOP_EXPRs.
8280
        * tree-simple.h: Remove LOOP_EXPRs from gimple grammar comment.
8281
        (build_and_jump): Declare.
8282
        * tree-ssa.c (remove_annotations_r): Don't handle LOOP_EXPRs.
8283
 
8284
2003-08-29  Daniel Berlin  
8285
 
8286
        * opts.c (decode_options): Turn on SSAPRE by default.
8287
 
8288
2003-08-29  Jason Merrill  
8289
 
8290
        * builtins.c (simplify_builtin): Make sure that the replacement
8291
        has the same type as the original expression.
8292
        (simplify_builtin_strpbrk): Fix type of COMPOUND_EXPR.
8293
        (simplify_builtin_strncpy, simplify_builtin_memcmp): Likewise.
8294
        (simplify_builtin_strncmp, simplify_builtin_strncat): Likewise.
8295
        (simplify_builtin_strspn, simplify_builtin_strcspn): Likewise.
8296
        (simplify_builtin_fputs, simplify_builtin_sprintf): Likewise.
8297
 
8298
2003-08-28  Zdenek Dvorak  
8299
 
8300
        * builtins.c (expand_builtin): Expand BUILT_IN_STACK_SAVE and
8301
        BUILT_IN_STACK_RESTORE.
8302
        * builtins.def (BUILT_IN_STACK_SAVE, BUILT_IN_STACK_RESTORE): New.
8303
        * gimplify.c (build_stack_save_restore): New functions.
8304
        (struct gimplify_ctx): New field save_stack.
8305
        (gimplify_bind_expr, gimplify_call_expr): Arrange save of stack on
8306
        BIND_EXPR entry and restore on exits.
8307
        * stmt.c (expand_stack_alloc): Saving of stack removed.
8308
        (expand_stack_save, expand_stack_restore): New.
8309
        * tree.h (expand_stack_save, expand_stack_restore): Declare.
8310
 
8311
2003-08-28  Diego Novillo  
8312
 
8313
        * tree-dfa.c (add_vdef): Check for duplicate voperands first.
8314
        Handle SSA_NAME in voperands.
8315
        (add_vuse): Likewise.
8316
 
8317
2003-08-27  Diego Novillo  
8318
 
8319
        * tree-flow.h (var_ann_d): Convert is_in_va_arg_expr into a
8320
        bitfield.
8321
 
8322
2003-08-27  Daniel Berlin  
8323
 
8324
        * tree-ssa-pre.c: Update comments to reflect reality.
8325
        (insert_one_operand): Remove #if'0d code.
8326
 
8327
2003-08-27  Zdenek Dvorak  
8328
 
8329
        * gcov.c (typedef struct arc_info): New field cs_count.
8330
        (accumulate_line_counts): Find cycles correctly.
8331
 
8332
2003-08-27  Daniel Berlin  
8333
 
8334
        * tree-ssa-pre.c (compute_du_info): Move #if ENABLE_CHECKING up one
8335
        line.
8336
 
8337
2003-08-27  Daniel Berlin  
8338
 
8339
        * tree.h (struct ephi_arg_d): New structure.
8340
        (struct eref_common): Remove non-used members, move some members
8341
        elsewhere.
8342
        (struct ephi_node): Ditto.
8343
 
8344
        * tree-optimize.c (optimize_function_tree): Move PRE before DCE.
8345
 
8346
        * tree.c (tree_size): use sizeof (struct ephi_arg_d) for ephi's.
8347
 
8348
        * tree-pretty-print.c (dump_generic_node): Re-teach to pretty
8349
        print euses/ephis/etc given new structures, members, and
8350
        relationships.
8351
 
8352
        * tree-ssa-pre.c (fixup_domchildren): Removed.
8353
        (a_dom_b): Ditto.
8354
        (calculate_preorder): Ditto.
8355
        (defs_match_p): Ditto.
8356
        (defs_y_dom_x): Ditto.
8357
        (compute_can_be_avail): Ditto.
8358
        (reset_can_be_avail): Ditto.
8359
        (reset_later): Ditto.
8360
        (compute_later): Ditto.
8361
        (repair_*): Ditto.
8362
        (set_replacement): Ditto.
8363
        (remove_ephi): Ditto.
8364
        (set_expruse_def): Ditto.
8365
        (occ_compare): Ditto.
8366
        (defs_hash_expr): Ditto.
8367
        (compute_dt_preorder): Ditto
8368
        (search_dt_preorder): Ditto.
8369
        (ephi_operand_for_pred): Ditto.
8370
        (injured_ephi_operand): Ditto.
8371
        (compute_stops): New function.
8372
        (occ_identical_to): Ditto.
8373
        (require_phi): Ditto.
8374
        (do_ephi_df_search_1): Ditto.
8375
        (do_ephi_df_search): Ditto.
8376
        (any_operand_injured): Ditto.
8377
        (compute_du_info): Ditto.
8378
        (add_ephi_use): Ditto.
8379
        (insert_one_operand): Ditto.
8380
        (add_ephi_pred): Ditto.
8381
        (created_phi_preds): New bitmap.
8382
        (dfn) Removed static variable.
8383
        (idom_of_ephi): Ditto.
8384
        (avdefs): Move into expr_info).
8385
        (struct ephi_use_entry): New structure for EPHI uses.
8386
        (struct ephi_df_search): New structure for depth first searchs.
8387
        (cant_be_avail_search): Implementation of structure for
8388
        cant_be_avail search.
8389
        (stops_search): Ditto for stops.
8390
        (replacing_search): Ditto for replacing_search.
8391
        (do_proper_save): Arguments changed, callers updated.
8392
        (create_ephi_node): Use sizeof (struct ephi_arg_d).
8393
        (ephi_has_bottom): Rewrite for updated ephi-pred handling.
8394
        (ephi_will_be_avail): Rewrite in terms of CANT_BE_AVAIL and STOPS.
8395
        (expr_phi_insertion): Remove dead code.
8396
        Update for new flags.
8397
        (insert_occ_in_preorder_dt_order_1): Only insert one ephi-pred per
8398
        block.
8399
        Fix exit occurence handling.
8400
        (rename_1): Remove occs stuff.
8401
        Update for new ephi-pred handling.
8402
        (reset_down_safe): Update for new ephi-pred handling.
8403
        (compute_down_safe): Ditto.
8404
        (can_insert): Ditto.
8405
        (insert_one_operand): Split out from finalize_1.
8406
        (finalize_1): Update for new ephi-pred handling.
8407
        Only insert non-pointless, will-be-avail phis, rather than *all*
8408
        ephis.
8409
        (get_temp): New function. Hand us the right temporary for a given
8410
        EPHI/EUSE.
8411
        (code_motion): Use EREF_TEMP again, now that we can do it
8412
        properly.
8413
 
8414
2003-08-26  Zdenek Dvorak  
8415
 
8416
        * builtins.c (expand_builtin): Handle STACK_ALLOC.
8417
        * builtins.def (BUILT_IN_STACK_ALLOC): New.
8418
        * c-simplify.c (gimplify_decl_stmt, c_gimplify_stmt,
8419
        gimplify_compound_literal_expr): Arrange explicit stack allocation.
8420
        * expr.c (expand_expr): Handle deferred variables.
8421
        * stmt.c (expand_stack_alloc): New.
8422
        * tree-simple.c (is_gimple_val): Prevent ADDR_EXPRs of vla's from
8423
        being reduced.
8424
        * tree.h (expand_stack_alloc): Declare.
8425
 
8426
2003-08-26  Zdenek Dvorak  
8427
 
8428
        * tree-ssa.c (build_dominator_tree): Use FOR_EACH_BB.
8429
 
8430
2003-08-26  Jason Merrill  
8431
 
8432
        * tree-simple.c (is_gimple_val): Also disallow memory vars.
8433
 
8434
2003-08-25  Zdenek Dvorak  
8435
 
8436
        * integrate.c (copy_decl_for_inlining): Reset DECL_TOO_LATE.
8437
 
8438
2003-08-25  Zdenek Dvorak  
8439
 
8440
        * tree-ssa-dom.c (optimize_block): Handle empty source block.
8441
 
8442
        * tree-ssa-dom.c (optimize_block):  Handle case when dominance
8443
        tree children have also other sucessors.  Add dump to jump
8444
        threading.
8445
 
8446
2003-08-25  Jason Merrill  
8447
 
8448
        * c-simplify.c (mark_labels_r): New fn.
8449
        (gimplify_decl_stmt): Use it to mark labels in static initializers.
8450
        * tree-simple.c (is_gimple_initializer): Remove.
8451
        (is_gimple_reg_type): New fn.
8452
        (is_gimple_reg): Use it.  Handle SSA_NAMEs properly.
8453
        * tree-simple.h: Adjust.
8454
        * gimplify.c (gimplify_expr) : Do nothing here.
8455
 
8456
        * gimplify.c (create_tmp_var): Set DECL_IGNORED_P.
8457
 
8458
        * tree-inline.c (initialize_inlined_parameters): Improve error
8459
        recovery.
8460
 
8461
        * gimplify.c (gimplify_boolean_expr): Just replace with a COND_EXPR.
8462
 
8463
2003-08-25  Diego Novillo  
8464
 
8465
        * tree-dfa.c (get_expr_operands): Don't create shared operands when
8466
        folding *&VAR expressions.
8467
 
8468
2003-08-24  Diego Novillo  
8469
 
8470
        * tree-flow.h (struct var_ann_d): Add field default_def.
8471
        (widen_bitfield): Declare.
8472
        (set_default_def): Declare.
8473
        (default_def): Declare.
8474
        * tree-flow-inline.h (set_default_def): New inline function.
8475
        (default_def): New inline function.
8476
        * tree-dfa.c (dump_variable): Display default_def, if set.
8477
        * tree-simple.c (is_gimple_reg): Check for DECL_P before checking
8478
        for DECL_EXTERNAL.
8479
        * tree-ssa-dom.c (add_expr_propagated_p): Remove.  Update all
8480
        users.
8481
        (find_new_vars_to_rename): New local function.
8482
        (tree_ssa_dominator_optimize): Add new argument vars_to_rename.
8483
        Change return type to void.  Update all users.
8484
        (optimize_block): Add new argument vars_to_rename.  Update all
8485
        users.
8486
        If the call to optimize_stmt returns true, add the statement to the
8487
        list of statements to re-scan for operands.
8488
        After optimizing the block and its dominator children, call
8489
        find_new_vars_to_rename for every statement that may have had new
8490
        symbols exposed.
8491
        (optimize_stmt): Change return type to bool.  Return true if the
8492
        statement may have had new symbols exposed by optimization.
8493
        Add a sanity check for the value returned by lookup_avail_expr.
8494
        Create equivalences for more memory stores, not just the ones done
8495
        via INDIRECT_REF expressions.
8496
        Call widen_bitfield when optimizing stores to bitfields.
8497
        (lookup_avail_expr): Reformat comment.
8498
        * tree-ssa.c (rewrite_into_ssa): Remove local variable
8499
        addr_expr_propagated_p.
8500
        Clear out vars_to_rename before running dominator optimizations.
8501
        (check_for_new_variables): Remove.
8502
        (rewrite_stmt): Always register new definitions and virtual
8503
        definitions.
8504
        (register_new_def): Update comment.
8505
        (get_reaching_def): Update the default_def field for the variable
8506
        if it didn't have a reaching definition.
8507
        * tree-ssa-ccp.c (widen_bitfield): Declare it extern.
8508
 
8509
2003-08-23  Zdenek Dvorak  
8510
 
8511
        * tree-cfg.c (bsi_next_in_bb): Work correctly when the block ends
8512
        with start of BIND_EXPR.
8513
 
8514
2003-08-23  Daniel Berlin  
8515
 
8516
        * tree-alias-ander.c (andersen_op_assign): Fix to join the operands,
8517
        the assign to the lhs.
8518
 
8519
2003-08-23  Daniel Berlin  
8520
 
8521
        * tree-alias-common.c (get_alias_var): Remove REFERENCE_EXPR.
8522
        (find_func_aliases): Fix some not quite right predicates, add ARRAY_REF
8523
        handling.
8524
 
8525
2003-08-22  Jeff Law  
8526
 
8527
        * tree-dfa.c (compute_alias_sets): A memory tag used for stores can
8528
        not conflict with objects marked TREE_READONLY.
8529
 
8530
        * tree-ssa-ccp.c (fold_stmt): Optimize reads from constant strings.
8531
 
8532
2003-08-22  Jason Merrill  
8533
 
8534
        * tree-simple.c: Total overhaul to only check forms and remove
8535
        unnecessary predicates.
8536
        (is_gimple_const): Accept function addresses here.
8537
        Don't accept LABEL_DECL or RESULT_DECL.
8538
        (is_gimple_val): Accept EXC_PTR_EXPR here.
8539
        (is_gimple_lvalue): Rename from is_gimple_modify_expr_lhs.
8540
        Accept BIT_FIELD_REF, REALPART_EXPR and IMAGPART_EXPR here.
8541
        (is_gimple_addr_expr_arg): Replace with former is_gimple_varname.
8542
        (is_gimple_constructor_elt): Just check for CONSTRUCTOR.
8543
        (is_gimple_initializer): Just hand off to is_gimple_rhs.
8544
        (is_gimple_rhs): Recognize most expressions here.
8545
        (is_gimple_variable): New fn.
8546
        (is_gimple_id): Use it.  Now static.
8547
        (is_gimple_reg): New fn.
8548
        (is_gimple_cast): Replace with former is_gimple_cast_op.
8549
        (is_gimple_constructor, is_gimple_expr): Remove.
8550
        (is_gimple_modify_expr, is_gimple_relop): Remove.
8551
        (is_gimple_binary_expr, is_gimple_unary_expr): Remove.
8552
        (is_gimple_call_expr, is_gimple_arglist): Remove.
8553
        (is_gimple_compound_lval, is_gimple_arrayref): Remove.
8554
        (is_gimple_compref, is_gimple_exprseq): Remove.
8555
        (is_gimplifiable_builtin): Remove.
8556
        * tree-simple.h: Adjust.
8557
        * gimplify.c (gimplify_conversion): Break out from gimplify_expr.
8558
        (gimplify_expr): Use is_gimple_reg predicate to force a temp.
8559
        : Use gimplify_compound_lval.
8560
        : Likewise.
8561
        : Use is_gimple_reg predicate.
8562
        : Use new gimplify_minimax_expr.
8563
        : Reject.
8564
        (gimplify_tree_list, gimplify_component_ref): Remove.
8565
        (gimplify_compound_lval): Include REALPART_EXPR and IMAGPART_EXPR.
8566
        (gimplify_component_ref): Remove.
8567
        (gimplify_call_expr): Handle non-gimplifiable builtins and walking
8568
        the argument list here.
8569
        (gimplify_tree_list): Remove.
8570
        (gimplify_addr_expr): Use fb_either.
8571
        * tree-simple.h: Adjust.
8572
        * tree-alias-common.c (find_func_aliases): Update use of predicates.
8573
 
8574
2003-08-21  Andrew Pinski  
8575
 
8576
        * tree-ssa.c (tree_ssa_useless_type_conversion): Check also the
8577
        precision of the type to make sure they are really useless type
8578
        conversions.
8579
 
8580
2003-08-21  Diego Novillo  
8581
 
8582
        * tree-dump.c (dequeue_and_dump): Handle 'r' and 's' code classes.
8583
 
8584
2003-08-21  Zdenek Dvorak  
8585
 
8586
        * c-pretty-print.c (print_c_tree): Create new pp object.
8587
 
8588
2003-08-21  Zdenek Dvorak  
8589
 
8590
        * tree-ssa-dom.c (tree_ssa_dominator_optimize): Don't free hash tables
8591
        before statistics are made from them.
8592
        * tree-ssa.c (rewrite_into_ssa): Ditto.
8593
 
8594
2003-08-21  Jason Merrill  
8595
 
8596
        * tree-inline.c (copy_body_r): Don't convert when stripping &*.
8597
        Fix thinko in stripping *&.
8598
 
8599
2003-08-21  Diego Novillo  
8600
            Zdenek Dvorak  
8601
 
8602
        * tree-cfg.c (stmt_starts_bb_p): Nonlocal and computed GOTO targets
8603
        always start a new block.
8604
 
8605
2003-08-20  Jason Merrill  
8606
 
8607
        * tree-pretty-print.c (dump_generic_node): Just print ""
8608
        for the RESULT_DECL.
8609
 
8610
        * c-simplify.c (make_type_writable, mostly_copy_tree_r): Remove.
8611
        (deep_copy_list, deep_copy_node): Remove.
8612
 
8613
        * expr.c (expand_expr): Don't check for 'r' or 's' if we're
8614
        checking IS_EXPR_CODE_CLASS.
8615
        * tree-dfa.c (may_access_global_mem_p): Likewise.
8616
        * tree-browser.c (browse_tree): Likewise.
8617
        * tree-ssa-pre.c (defs_hash_expr): Likewise.
8618
        * gimplify.c (gimplify_expr): Likewise.
8619
        (internal_get_tmp_var): Only copy TREE_LOCUS from an expr.
8620
        (mostly_copy_tree_r): Ignore decls here.
8621
 
8622
2003-08-20  Diego Novillo  
8623
 
8624
        * c-pretty-print.c: Discard.  Replace with same file from
8625
        mainline.  Update all users.
8626
        (print_c_tree): New function.
8627
        * c-pretty-print.h (print_c_tree): Declare.
8628
        * tree-pretty-print.c: Update to use new pp_* primitives.
8629
        * c-simplify.c: Include c-pretty-print.h.
8630
        * Makefile.in (c-simplify.o): Add dependency on $(C_PRETTY_PRINT_H).
8631
 
8632
2003-08-20  Roger Sayle  
8633
 
8634
        * c-common.h (enum c_tree_index): Delete CTI_SIGNED_SIZE_TYPE.
8635
        (signed_size_type_node): No longer a member of c_global_trees.
8636
        * tree.h (enum tree_index): New member TI_SIGNED_SIZE_TYPE here.
8637
        (signed_size_type_node): Moved, now a member of global_trees.
8638
 
8639
2003-08-20  Zdenek Dvorak  
8640
 
8641
        * tree-ssa-dom.c (optimize_block): Thread jump into empty
8642
        block correctly.
8643
 
8644
        * tree-cfg.c (linearize_cond_expr): Don't merge blocks if the
8645
        later has other predecessors.
8646
 
8647
2003-08-19  Jason Merrill  
8648
 
8649
        * c-typeck.c (build_array_ref): Also build ARRAY_REFs from
8650
        INDIRECT_REFs of ARRAY_TYPE.
8651
 
8652
        * tree-ssa.c (tree_ssa_useless_type_conversion): Also strip
8653
        conversions between pointer and reference types.
8654
 
8655
        * tree-dfa.c (get_stmt_operands): Just mark non-GIMPLE statements
8656
        as unmodified.
8657
        (find_referenced_vars): So we don't need to mark them here.
8658
 
8659
        * tree-inline.c (inline_data): Add retvar field.
8660
        (declare_return_variable): Set it.
8661
        (remap_decls): Use it.
8662
        (expand_call_inline): Tweak.
8663
 
8664
2003-08-19  Zdenek Dvorak  
8665
 
8666
        * cfg.c (dump_edge_info): Add name for EDGE_LOOP_EXIT flag.
8667
 
8668
2003-08-19  Zdenek Dvorak  
8669
 
8670
        * tree-flow.h (struct var_ann_d): New field scope.
8671
        (struct stmt_ann_d): New field scope.
8672
        (propagate_copy): Declaration changed.
8673
        (fixup_var_scope): Declare.
8674
        * tree-cfg.c (make_blocks, make_cond_expr_blocks,
8675
        make_catch_expr_blocks, make_eh_filter_expr_blocks,
8676
        make_try_expr_blocks, make_loop_expr_blocks, make_switch_expr_blocks,
8677
        make_bind_expr_blocks, build_tree_cfg): Assign variables and statements
8678
        to scopes.
8679
        (assign_vars_to_scope): New.
8680
        * tree-ssa-copyprop.c (move_var_to_scope): New.
8681
        (copyprop_stmt): Pass scope of statement to propagate_copy.
8682
        (propagate_copy): Assign variable to the right bind_expr.
8683
        (fixup_var_scope): New.
8684
        * tree-ssa-dom.c (optimize_stmt): Pass scope of statement to
8685
        propagate_copy.
8686
 
8687
2003-08-19  Daniel Berlin 
8688
 
8689
        * tree-cfg (bsi_move_after): New function.
8690
        (bsi_move_before): New function.
8691
        (bsi_move_to_bb_end): New function.
8692
        * tree-flow.h: Prototype new functions.
8693
 
8694
2003-08-18  Daniel Berlin  
8695
 
8696
        * tree-alias-ander.c: Remove doxygen markers.
8697
        (eq_to_var): remove.
8698
        (simple_cmp): Add.
8699
        (throwaway_global): Add.
8700
        (andersen_same_points_to_set): Handle ignoring global var aliasing the
8701
        right way here.
8702
        (andersen_may_alias): Use list_member to avoid stupid hack.
8703
        * tree-alias-common.c: Remove hacks for disabling global var aliasing.
8704
 
8705
2003-08-17  Zdenek Dvorak  
8706
 
8707
        * tree.c (resize_phi_node): Initialize new entries.
8708
 
8709
2003-08-17  Jeff Law  
8710
 
8711
        * tree-pretty-print.c (last_bb): Actually record the basic block,
8712
        not just its index.
8713
        (maybe_init_pretty_print): Corresponding changes.
8714
        (dump_generic_node, dump_vops): Test the actual block pointers, not
8715
        their indices.
8716
 
8717
        * tree-ssa-dom.c (optimize_block): Use equivalences from the
8718
        dominator tree walk to thread through conditional jumps at leafs in
8719
        the dominator tree.
8720
 
8721
        * tree-cfg.c (blocks_unreachable_p, remove_blocks): Use a bitmap
8722
        rather than a varray.
8723
        (REMOVE_ALL_STMTS, REMOVE_NO_STMTS): New defines for remove_bb.
8724
        (REMOVE_NON_CONTROL_STMTS, REMOVE_CONTROL_STMTS): Likewise.
8725
        (remove_unreachable_block): Use find_contained_blocks rather
8726
        than find_subblocks.  If we have a COND_EXPR or SWITCH_EXPR which
8727
        is unreachable, but which has reachable children clear out the
8728
        condition and request all non-control statements be removed
8729
        from the block.
8730
        (remove_bb): Allow better control over what (if any) statements
8731
        are removed.  All callers updated.
8732
        (find_subblocks): Remove.
8733
        (find_contained_blocks): Handle statements with no associated
8734
        basic block.
8735
 
8736
2003-08-15  Andrew Pinski 
8737
 
8738
        * objc/objc-lang.c (LANG_HOOKS_GIMPLIFY_EXPR): Define
8739
        as the c gimplifier.
8740
 
8741
2003-08-15  Jeff Law  
8742
 
8743
        * tree-cfg.c (cleanup_tree_cfg): Wipe out the dominator tree
8744
        if the number of basic blocks changes as a result of cfg cleanups.
8745
        * tree-flow.h (build_dominator_tree): Prototype.
8746
        * tree-ssa-dom.c (tree_ssa_dominator_optimize): Build the dominator
8747
        tree if it is not already available.
8748
        * tree-ssa.c (build_dominator_tree): New function.
8749
        (rewrite_into_ssa): Use it.
8750
 
8751
        * gimplify.c (gimplify_expr, cases NOP_EXPR, CONVERT_EXPR): If a
8752
        COMPONENT_REF is wrapped with a NOP_EXPR, then force the type of
8753
        the COMPONENT_REF to match the accessed field.  Strip away
8754
        unnecessary type conversions and handle the case where all type
8755
        conversions were removed.
8756
        (case ARRAY_REF, COMPONENT_REF): Indicate to gimplify_array_ref
8757
        and gimplify_component_ref if we want an lvalue or not.
8758
        (gimplify_array_ref, gimplify_component_ref): Pass new argument
8759
        WANT_LVALUE through to gimplify_compound_lval.
8760
        (gimplify_compound_lval): If we do not want an lvalue and the
8761
        toplevel COMPONENT_REF's type does not match its field's type,
8762
        then wrap the COMPONENT_REF in a NOP_EXPR and force the
8763
        COMPONENT_REF's type to match its field's type.
8764
        (gimplify_modify_expr): If the RHS is a CALL_EXPR and the LHS
8765
        is not a gimple temporary, then force the RHS through a gimple
8766
        temporary, even if the call can not throw.
8767
        (create_tmp_var): Make sure not to lose the type's attributes
8768
        for the new variable.
8769
        * tree-ssa.c (tree_ssa_useless_type_conversion): New function.
8770
        * tree-flow.h (tree_ssa_useless_type_conversion): Prototype.
8771
        * tree-ssa-dom.c (optimize_stmt): Use tree_ssa_useless_type_conversion.
8772
 
8773
        * tree-cfg.c (remove_useless_stmts_and_vars): Catch more
8774
        useless statements created during the out-of-ssa pass.
8775
 
8776
2003-08-14  Jeff Law  
8777
 
8778
        * tree-ssa-dom.c (optimize_block): Record equivalences created by
8779
        SWITCH_EXPRs.
8780
 
8781
        * tree-ssa-dom.c (optimize_stmt): Allow optimizing the RHS of
8782
        a RETURN_EXPR which contains an optimizable MODIFY_EXPR.
8783
        (lookup_avail_expr): Corresponding changes.
8784
        (avail_expr_hash, avail_expr_eq): Likewise.
8785
 
8786
        * tree-ssa-dom.c (optimize_stmt): Fix typo which prevented
8787
        stores with more than one VDEF from creating useful equivalences.
8788
 
8789
        * tree-dfa.c (get_expr_operands): Do not special case *0;
8790
 
8791
        * fold-const.c (fold, case INDIRECT_REF): Revert last change.
8792
 
8793
2003-08-14  Diego Novillo  
8794
 
8795
        * tree-cfg.c (bsi_insert_on_edge_immediate): Only update the
8796
        container for the head tree of the next block if the new statement
8797
        needs to be linked to it.
8798
 
8799
2003-08-13  Jeff Law  
8800
 
8801
        * fold-const.c (fold, case INDIRECT_REF): Optimize reads from
8802
        constant strings.
8803
 
8804
        * tree-cfg.c (remove_useless_stmts_and_vars): For a COND_EXPR
8805
        where the condition is a variable and the ELSE clause merely
8806
        sets that variable to zero, remove the ELSE clause.
8807
 
8808
        * tree-ssa-dom.c (optimize_stmt): Do not check the type of the
8809
        value returned by lookup_avail_expr.
8810
 
8811
2003-08-13  Daniel Berlin  
8812
 
8813
        * tree-cfg.c (remove_stmt):  Add new argument saying whether to remove
8814
        annotations and invalidate defs.  Update all callers
8815
        (remove_bsi_from_block): Moved from bsi_remove, argument added.
8816
        (bsi_remove): Made into wrapper for remove_bsi_from_block.
8817
 
8818
2003-08-13  Zdenek Dvorak  
8819
 
8820
        * tree-ssa-dom.c (optimize_stmt): Call get_stmt_operands.
8821
 
8822
2003-08-12  Jeff Law  
8823
 
8824
        * tree-ssa-dom.c (optimize_stmt): Record equivalences created
8825
        by memory stores.
8826
 
8827
2003-08-12  Diego Novillo  
8828
 
8829
        * tree-cfg.c (find_insert_location): Handle other control
8830
        statements that may be at the end of the block.
8831
 
8832
2003-08-12  Zdenek Dvorak  
8833
 
8834
        * Makefile.in (tree-pretty-print.o): Add tree-iterator.h dependency.
8835
        * tree-pretty-print.c: Include tree-iterator.h.
8836
        (dump_generic_node): Avoid recursing into COMPOUND_EXPRs.
8837
 
8838
2003-08-12  Jeff Law  
8839
 
8840
        * tree-ssa-dom.c (optimize_stmt): Optimize ABS_EXPR when we know
8841
        the sign of the source operand.
8842
 
8843
        * tree-ssa-dom.c (optimize_stmt): Rewrite TRUNC_DIV_EXPR and
8844
        TRUNC_MOD_EXPR even if the LHS is not an SSA variable.  Do not
8845
        enter the new expression in the hash tables if !may_optimize_p.
8846
        Also try GE_EXPR to see if this transformation is safe.
8847
 
8848
        * tree-ssa-dom.c (optimize_stmt): Fix typo in last change which
8849
        prevented recording equivalences created by IOR_EXPR.
8850
 
8851
        * tree-ssa-dom.c (optimize_stmt): Record that the destination of
8852
        a MODIFY_EXPR nonzero if the RHS contains an IOR with a nonzero
8853
        constant.  Turn DIV/MOD by a power of 2 into SHIFT/AND if we know
8854
        dividend is positive.
8855
 
8856
2003-08-11  Jeff Law  
8857
 
8858
        * fold-const.c (fold, cases NE_EXPR and EQ_EXPR): Fold equality
8859
        comparisons of non-weak symbol addresses against zero.
8860
 
8861
        * tree-ssa-ccp.c (fold_stmt): Strip unnecessary NOP_EXPRs from
8862
        the folded result.
8863
 
8864
        * gimplify.c (gimplify_expr, case INDIRECT_REF): Copy the base
8865
        object into a temporary if it's in static memory or is addressable.
8866
 
8867
2003-08-11  Steven Bosscher  
8868
 
8869
        * tree-alias-common.h (struct tree_alias_ops): Add a semicolon, fix
8870
        bootstrap.
8871
 
8872
2003-08-10  Daniel Berlin  
8873
 
8874
        * tree-dfa.c (compute_may_aliases): Move points-to initialization from
8875
        here.
8876
        (find_referenced_vars): To here.
8877
        (get_memory_tag_for): Use new same_points_to_set function.
8878
 
8879
        * tree-alias-common.h (struct tree_alias_ops): Remove doxygen markers.
8880
        Add same_points_to_set function to struct.
8881
        (same_points_to_set): New function.
8882
 
8883
        * tree-alias-common.c (we_created_global_var): A bit of magic to ignore
8884
        global var aliasing when we didn't create global var.  This will go
8885
        away soon
8886
        (same_points_to_set): New function.
8887
 
8888
        * tree-alias-andersen.c (struct andersen_alias_ops): Add
8889
        andersen_same_points_to_set.
8890
        (andersen_same_points_to_set): New function. Return true if the two
8891
        variables have the same points-to set.
8892
 
8893
        * opts.c (common_handle_option): Add "none" as a points-to option.
8894
 
8895
2003-08-10  Paul Brook  
8896
 
8897
        * doc/install.texi: Mention --enable-languages=f95.
8898
 
8899
2003-08-09  Daniel Berlin  
8900
 
8901
        * tree-pretty-print.c (dump_vops): check bb->tree_annotations, not
8902
        bb->aux.
8903
 
8904
2003-08-08  Daniel Berlin  
8905
 
8906
        * tree-cfg.c (bsi_insert_on_edge_immediate): If there's only
8907
        one statement in the block, and it's an empty statement, replace it.
8908
 
8909
2003-08-08  Jason Merrill  
8910
 
8911
        * c-decl.c (c_expand_body_1): Restore support for
8912
        !keep_function_tree_in_gimple_form.
8913
        (finish_function, c_expand_deferred_function): Do TDI_inlined dump.
8914
 
8915
        * gimplify.c (voidify_wrapper_expr): Set TREE_SIDE_EFFECTS on the
8916
        wrapper if we insert a MODIFY_EXPR.
8917
 
8918
2003-08-07  Diego Novillo  
8919
 
8920
        * Makefile.in (GTFILES): Add tree-ssa.c, tree-dfa.c and
8921
        tree-ssa-ccp.c.
8922
        (gt-tree-ssa.h, gt-tree-dfa.h, gt-tree-ssa-ccp.h): Depend on
8923
        s-gtype.
8924
        * tree-dfa.c (struct clobber_data_d): Remove.  Update all users.
8925
        (struct alias_map_d): Mark for garbage collection.
8926
        (struct walk_state): Add fields 'is_not_gimple' and
8927
        'is_va_arg_expr'.
8928
        (clobber_vars_r): Remove.  Update all users.
8929
        (get_stmt_operands): Abort if attempting to get operands from a
8930
        non-GIMPLE statement.
8931
        (get_expr_operands): Likewise.
8932
        Do not force a virtual operand when scanning VA_ARG_EXPR.
8933
        (add_stmt_operand): If the variable has hidden uses, mark the
8934
        statement as having volatile operands and return.
8935
        If the variable occurs inside a VA_ARG_EXPR, add it as a virtual
8936
        operand.
8937
        (add_immediate_use): Call VARRAY_TREE_INIT instead of
8938
        VARRAY_GENERIC_PTR_INIT.
8939
        (dump_variable): Check is_in_va_arg_expr flag.
8940
        (compute_may_aliases): Move code to find variables ...
8941
        (find_referenced_vars): ... here.
8942
        (find_vars_r): Abort if we find a non-GIMPLE expression
8943
        unexpectedly.
8944
        Mark variables found inside a VA_ARG_EXPR.
8945
        Do not scan arguments for non-GIMPLE CALL_EXPRs.
8946
        Remove local variable saved_is_store.
8947
        Reformat some code for readability.
8948
        (add_referenced_var): If the variable is already marked as having
8949
        hidden uses, ignore it.
8950
        If the variable is found inside a non-GIMPLE expression, mark it.
8951
        If the variable is found inside a VA_ARG_EXPR, mark it.
8952
 
8953
        * tree-flow.h (struct var_ann_d): Add field is_in_va_arg_expr.
8954
        (find_referenced_vars): Declare.
8955
        * tree-optimize.c (optimize_function_tree): Call
8956
        find_referenced_vars before computing may aliases.
8957
 
8958
        * tree-ssa-dce.c (need_to_preserve_store): Do not check if the
8959
        variable has hidden uses.
8960
        * tree-ssa-live.c (type_var_init): Likewise.
8961
 
8962
        * tree-ssa-ccp.c (ssa_edges): Mark for garbage collection.
8963
        (tree_ssa_ccp): Use VARRAY_.*_EDGE calls to manipulate the varray
8964
        of CFG edges.
8965
        (add_control_edge): Likewise.
8966
        (initialize): Likewise.
8967
        * tree-ssa.c (struct def_blocks_d): Mark for garbage collection.
8968
        (struct var_value_d): Likewise.
8969
        (def_blocks_free): Remove.  Update all users.
8970
        (rewrite_into_ssa): Do not specify free function when creating
8971
        def_blocks and currdefs.
8972
        Call sbitmap_free instead of free.
8973
        (mark_def_sites): Call sbitmap_free instead of free.
8974
        (set_def_block): Use GC allocation.
8975
        (set_livein_block): Likewise.
8976
        (insert_phi_nodes): Adjust name of varray def_maps when creating it.
8977
        (insert_phis_for_deferred_variables): Remove call to BITMAP_XFREE.
8978
        (insert_phi_nodes_for): Use GC allocation for phi_insertion_points.
8979
        (init_tree_ssa): Remove typecast in call to memset.
8980
        (set_value_for): Use GC allocation.
8981
        (get_def_blocks_for): Remove typecast in call to htab_find.
8982
        * varray.c (element): Add entry for struct edge_def *.
8983
        * varray.h (enum varray_data_enum): Add VARRAY_DATA_EDGE.
8984
        (union varray_data_tag): Add field of type struct edge_def *.
8985
        (VARRAY_EDGE_INIT): Define.
8986
        (VARRAY_EDGE): Define.
8987
        (VARRAY_PUSH_EDGE): Define.
8988
        (VARRAY_TOP_EDGE): Define.
8989
 
8990
2003-08-06  Diego Novillo  
8991
 
8992
        * tree-cfg.c (handle_switch_fallthru): Do not abort when the last
8993
        statement of the case block needs to be the last statement of the
8994
        block.
8995
        (find_insert_location): Fix typo.
8996
 
8997
2003-08-06  Steven Bosscher  
8998
 
8999
        * tree-dfa.c (remove_phi_arg):  When the PHI no longer has
9000
        arguments, don't remove it here, but do so...
9001
        (remove_phi_arg_num): ...from here.
9002
 
9003
2003-08-05  Jason Merrill  
9004
 
9005
        * gimplify.c (gimplify_cond_expr): Gimplify shortcut expansion in
9006
        a conditional context.
9007
 
9008
        * tree-cfg.c (make_catch_expr_blocks): Don't change next_block_link.
9009
        (make_eh_filter_expr_blocks): Likewise.
9010
 
9011
        * tree-dfa.c (add_referenced_var): Static locals are call
9012
        clobbered.
9013
 
9014
2003-08-05  Steven Bosscher  
9015
 
9016
        * tree-dfa.c (add_phi_arg): Allow PHI capacity to grow.
9017
        * tree-flow.h  (add_phi_arg): Adjust prototype.
9018
        * tree-ssa-pre.c (code_motion): Adjust call.
9019
        * tree-ssa.c (rewrite_block): Likewise.
9020
        * tree.c (resize_phi_node): New function.
9021
        * tree.h (resize_phi_node): Add prototype.
9022
 
9023
2003-08-05  Jeff Law  
9024
 
9025
        * tree-ssa-dom.c (optimize_block): Be more aggressive about
9026
        creating equivalences from PHI nodes.
9027
 
9028
        * tree-ssa-dom.c (optimize_stmt): Strip away certain NOP_EXPRs
9029
        before determining if we have an equivalence to enter into
9030
        the const_and_copies table.
9031
 
9032
        * tree-ssa-dce.c (remove_dead_stmts): Iterate backwards through the
9033
        basic blocks removing dead statements.  Within each block iterate
9034
        backwards through the statements removing those which are dead.
9035
 
9036
        * tree-ssa-optimize.c (optimize_function_tree): Call
9037
        remove_useless_stmts_and_vars before building the flow graph.
9038
        * tree-cfg.c (remove_useless_stmts_and_vars): Rename argument from
9039
        first_iteration to remove_unused_vars.
9040
 
9041
        * tree-cfg.c (remove_unreachable_blocks): Remove blocks in reverse
9042
        order.
9043
        (remove_bb): Remove unwanted call to bsi_next.
9044
        (bsi_remove): Refine code which removes useless COMPOUND_EXPRs to allow
9045
        removal if one of the arms is not associated with a basic block.
9046
        (remove_stmt): Improve check for testing when a basic block head/end
9047
        pointer needs to be updated when removing a COMPOUND_EXPR.
9048
 
9049
        * tree-cfg.c (phi_alternatives_equal): New function.
9050
        (linearize_cond_expr): Allow linearization if the PHI nodes at the
9051
        target have equivalent arguments for the incoming edges from the THEN
9052
        and ELSE clauses.
9053
 
9054
        * tree-ssa-dce.c (mark_tree_necessary): Empty statements may be
9055
        necessary.
9056
        (process_worklist): Handle any incoming abnormal edges the first
9057
        time a statement in each block becomes executable.
9058
 
9059
        * tree-ssa-ccp.c (substitute_and_fold): Substitute known
9060
        constants into PHI nodes.
9061
 
9062
2003-08-04  Sebastian Pop  
9063
 
9064
        * basic-block.h: Declare bb_ann_d.
9065
        (basic_block_def): Add a field tree_annotations.
9066
        * cfg.c (entry_exit_blocks): Initialize tree_annotations to NULL.
9067
        * cfghooks.c: Remove the definition of cfg_level.
9068
        (rtl_register_cfg_hooks): Remove the initiallization of cfg_level.
9069
        * cfghooks.h (cfg_hooks): Add cfgh_loop_optimizer_init, and
9070
        cfgh_loop_optimizer_finalize.
9071
        (loop_optimizer_init, loop_optimizer_finalize): New macros.
9072
        (cfg_level): Remove.
9073
        * cfgloop.h (loop_optimizer_init, loop_optimizer_finalize): Rename
9074
        to rtl_loop_optimizer_init and rtl_loop_optimizer_finalize.
9075
        * cfgrtl.c (rtl_loop_optimizer_init, rtl_loop_optimizer_finalize):
9076
        Declare, and register them in rtl_cfg_hooks and cfg_layout_rtl_cfg_hook.
9077
        * loop-init.c (loop_optimizer_init, loop_optimizer_finalize): Rename
9078
        to rtl_loop_optimizer_init and rtl_loop_optimizer_finalize.  Remove
9079
        the checks to cfg_level.
9080
        * tree-cfg.c (block_tree_ann_obstack, first_block_tree_ann_obj): New.
9081
        (create_blocks_annotations, create_block_annotation,
9082
        free_blocks_annotations, clear_blocks_annotations): New functions.
9083
        (tree_loop_optimizer_init, tree_loop_optimizer_finalize): New
9084
        functions.  Register them in tree_cfg_hooks.
9085
        (build_tree_cfg, dump_tree_bb, delete_tree_cfg, tree_split_edge): Use
9086
        create_blocks_annotations instead of alloc_aux_for_blocks,
9087
        create_block_annotation instead of alloc_aux_for_block,
9088
        .tree_annotations instead of .aux,
9089
        free_blocks_annotations instead of free_aux_for_blocks.
9090
        (tree_register_cfg_hooks): Remove initialization of cfg_level.
9091
        * tree-flow-inline.h (bb_ann): Use .tree_annotations.
9092
        * tree-flow.h: Update comment.
9093
 
9094
2003-08-04  Zdenek Dvorak  
9095
 
9096
        * Makefile.in (c-pretty-print.o): Add TREE_H and C_TREE_H dependencies.
9097
 
9098
2003-08-01  Paul Brook  
9099
 
9100
        * Makefile.in (GMPINC): Set and use.
9101
        (GMPLIBS): Set it.
9102
        * configure.in: Add test and switches for the GMP library.
9103
        (all_need_gmp): Set from config-lang.in.
9104
        * sourcebuild.texi: Document need_gmp.
9105
        * configure: regen
9106
 
9107
2003-08-01  Steven Bosscher  
9108
 
9109
        * tree-inline.c (expand_calls_inline): Fix comments.
9110
 
9111
2003-07-31  Diego Novillo  
9112
 
9113
        * Makefile.in (tree-ssa-ccp.o): Depend on $(EXPR_H).
9114
        * builtins.c (c_strlen): Remove static declaration.
9115
        (simplify_builtin_fputs): Remove static declaration.
9116
        (simplify_builtin_sprintf): New local function.
9117
        (expand_builtin_sprintf): Remove by surrounding with #if 0.
9118
        (expand_builtin): Add BUILT_IN_SPRINTF to the list of built-ins
9119
        handed over to simplify_builtin.
9120
        (validate_arglist): Do not allow arguments with TREE_SIDE_EFFECTS.
9121
        (simplify_builtin_fputs): Add new argument KNOWN_LEN.  If it's set,
9122
        use it instead of trying to compute the length of the string.
9123
        Update all callers.
9124
        * expr.h (simplify_builtin_fputs): Declare.
9125
        * tree-flow.h (fold_stmt): Change argument type to tree *.  Update
9126
        all users.
9127
        * tree-ssa-ccp.c: Include expr.h.
9128
        (replace_uses_in): If the statement makes a call to some selected
9129
        built-ins, mark it for folding.
9130
        (get_strlen): New local function.
9131
        (ccp_fold_builtin): New local function.
9132
        (fold_stmt): Call it.
9133
        (set_rhs): Fix if-else-if chaining.  Handle cases where the whole
9134
        statement needs to be replaced.
9135
        * tree.h (c_strlen): Declare.
9136
 
9137
2003-07-31  Diego Novillo  
9138
 
9139
        Fix PR optimization/11373
9140
        * tree-ssa-dce.c (stmt_useful_p): Get statement operands before
9141
        checking for volatile operands.
9142
        * tree-dfa.c (get_expr_operands): If a constant is dereferenced as a
9143
        pointer, mark the statement as having volatile operands.
9144
        (may_access_global_mem_p): If a non-NULL constant is used as a
9145
        pointer, consider it as pointing to global memory.
9146
        * tree-ssa-dom.c (optimize_stmt): Set addr_expr_propagated_p when
9147
        propagating pointers that are integer constants.
9148
 
9149
2003-07-31  Andrew MacLeod  
9150
 
9151
        * tree-dfa.c (add_stmt_operand): Don't treat complex types as scalars.
9152
        * tree-ssa-live.c (var_union):  Change comment.
9153
        (coalesce_tpa_members): Don't proceed if var_union fails.
9154
        * tree-ssa.c (insert_copy_on_edge): Change comment.
9155
        (coalesce_abnormal_edges): Handle var_union failing.
9156
        (coalesce_vars): Skip constant PHI arguments.
9157
 
9158
2003-07-30  Jeff Law  
9159
 
9160
        * tree-cfg.c (bsi_remove): Don't remove a COMPOUND_EXPR with empty
9161
        arms if the arms are in different basic blocks.
9162
 
9163
        * tree-ssa-dom.c (record_cond_is_false): New function.
9164
        (record_cond_is_true): Similarly.
9165
        (get_eq_expr_value): Use record_cond_expr_is_{true,false}.
9166
        (optimize_stmt): Fix minor formatting issue.  If we encounter an
9167
        INDIRECT_REF, record that the dereferenced pointer can not be
9168
        null.
9169
 
9170
2003-07-30  Daniel Berlin  
9171
 
9172
        * tree-dump.c (dump_option_value_in): "all" is now everything but
9173
        TDF_RAW and TDF_SLIM.
9174
 
9175
2003-07-30  Diego Novillo  
9176
 
9177
        * tree-simple.c (is_gimple_const): Accept CONST + CONST expressions
9178
        as GIMPLE constants.
9179
 
9180
2003-07-30  Daniel Berlin  
9181
 
9182
        * tree-ssa-pre.c: #include real.h
9183
        (defs_match_p): Change arguments to something normal now that we use
9184
        the new renaming algorithm. Update all callers.
9185
        Use defs_hash_expr.
9186
        (defs_y_dom_x): Ditto.
9187
        (defs_hash_expr): New. Based on iterative_hash_expr.
9188
        (generate_exr_as_of_bb): If there aren't any uses, return.
9189
        (subst_phis): Call modify_stmt on the actually modified statement. :)
9190
        (get_default_def): Only walk SSA_NAME arguments in PHI's.
9191
 
9192
2003-07-30  Jason Merrill  
9193
 
9194
        Don't modify code that is already GIMPLE.
9195
        * gimplify.c (gimplify_expr): Don't return early if the predicate
9196
        matches.
9197
        Use a variable temp if the caller wants an lvalue.
9198
        Don't call gimplify_constructor if we're on the rhs of a MODIFY_EXPR.
9199
        (add_tree, add_stmt_to_compound): Do add an empty stmt if we
9200
        previously had nothing at all.
9201
        (gimplify_return_expr): Don't mess with iterators if it was already
9202
        gimple.
9203
        (gimplify_cond_expr): Remove a COND_EXPR with two empty arms.
9204
        (gimplify_call_expr): Try to simplify a builtin again after
9205
        gimplifying the args.
9206
        (internal_get_tmp_var): Gimplify the new MODIFY_EXPR.
9207
        (gimplify_expr, gimple_push_cleanup): Use boolean_false_node.
9208
        (gimplify_init_constructor): New fn, broken out from...
9209
        (gimplify_modify_expr): ...here.  Be smarter about zero-initialization.
9210
        * tree-simple.c (is_gimple_rhs): Accept any CONSTRUCTOR.
9211
        * tree-simple.h: Adjust add_tree prototype.
9212
 
9213
2003-07-29  Daniel Berlin  
9214
 
9215
        * tree-alias-common.c (create_alias_vars):  If we created global_var,
9216
        delete it when we are done.
9217
        (ptr_may_alias_var): Handle case that global_var is now NULL_TREE.
9218
 
9219
2003-07-29  Jeff Law  
9220
 
9221
        * tree-ssa-dom.c (optimize_stmt): Propagate copies into VUSEs and
9222
        the RHS of VDEFs.
9223
 
9224
2003-07-29  Andrew MacLeod  
9225
 
9226
        * tree-ssa.c (insert_copy_on_edge): Only set used bit on DECL nodes.
9227
 
9228
2003-07-29  Andrew MacLeod  
9229
 
9230
        * common.opt (ftree-combine-temps): Add new option.
9231
        * flags.h (flag_tree_combine_temps): New flag.
9232
        * opts.c (decode_options): Initialize flag_tree_combine_temps.
9233
        (common_handle_option): Handle new flag.
9234
        * toplev.c (flag_tree_combine_temps): Declare.
9235
        (lang_independent_options f): Add tree-combine-temp.
9236
        * tree-ssa-live.c (var_union): When combining 2 root variables, choose
9237
        the user variable over a temporary as the new variable.
9238
        (compact_var_map): Use renamed root_var routines.
9239
        (calculate_live_on_exit): Reformatting.
9240
        (tpa_init): Initialize a tpa object.
9241
        (tpa_remove_partition): Remove a partition from a tpa list.
9242
        (tpa_delete): Delete a tpa object.
9243
        (tpa_compact): Hide single elemenet lists.
9244
        (root_var_init): Split common part into tpa_init and rename.
9245
        (remove_root_var_partition, delete_root_va, dump_root_var): Delete.
9246
        (type_var_init): New. Initialize a type_var object.
9247
        (create_coalesce_list): New. Create a coalesce_list object.
9248
        (delete_coalesce_list): New. Free a coalesce list's memory.
9249
        (find_partition_pair): New. Find a coalesce pair in a coalesce list.
9250
        (add_coalesce): New. Add a coalesce between 2 partitions.
9251
        (sort_coalesce_list): New. Sort coalesce pairs by importance.
9252
        (pop_best_coalesce): New. Get best remaining pair to coalesce.
9253
        (add_conflicts_if_valid): Move from tree-ssa.c.
9254
        (build_tree_conflict_graph): Move from coalesce_ssa_name in tree-ssa.c.
9255
        Genericize to use tpa_p instead of root_var object. Don't add
9256
        interferences between copies. Update coalesce list.
9257
        (coalesce_tpa_members): Move from coalesce_ssa_name in tree-ssa.c. Use
9258
        tpa_p instead of root_var. Use coalesce list if provided.
9259
        (dump_coalesce_list): New. Show debug info for a coalesce list.
9260
        (tpa_dump): Rename from dump_root_var and genericize to use tpa_p.
9261
        * tree-ssa-live.h (root_var_p): Rename structure type to tpa_p
9262
        (tpa_num_trees, tpa_tree, tpa_first_partition, tpa_next_partition,
9263
        tpa_find_tree): New. Generic versions of existing root_var routines.
9264
        (tpa_decompact): New. Include single version lists.
9265
        (root_var_p): Declare as type tpa_p.
9266
        (root_var_num, root_var, root_var_first_partition,
9267
        root_var_next_partition, root_var_dump, root_var_delete,
9268
        root_var_remove_partition, root_var_find , root_var_compac,
9269
        root_var_decompac): Rename and call generic versions.
9270
        (type_var_p): New. Use tpa_p structure for a type based association.
9271
        (type_var_num, type_var, type_var_first_partition,
9272
        type_var_next_partition, type_var_dump, type_var_delete,
9273
        type_var_remove_partition, type_var_find, type_var_compact,
9274
        type_var_decompact): New. Call generic versions of the routine.
9275
        (struct partition_pair_d): New. Represent a desired coalesce.
9276
        (struct coalesce_list_d): New. Organize lists of desired coalesces.
9277
        (NO_BEST_COALESCE): Define value.
9278
        * tree-ssa.c (set_if_valid): Remove.
9279
        (insert_copy_on_edge): Set variable as used when inserting a copy.
9280
        (add_conflicts_if_valid): Remove. Move to tree-ssa-live.c.
9281
        (print_exprs): New. Routine for commonly used output format.
9282
        (coalesce_abnormal_edges): New. Split from coalece_ssa_name. Force
9283
        partition coalesces across abnormal edges.
9284
        (coalesce_ssa_name): Split out build_tree_conflict_graph,
9285
        coalesce_abnormal_edges, and coalesce_tpa_members. Return live
9286
        range info if required. Use renamed root_var routines.
9287
        (assign_vars): Use renamed root_var routines.
9288
        (replace_variable): Mark as inline.
9289
        (coalesce_vars): Coalesce variable memory storage.
9290
        (rewrite_out_of_ssa): Don't compact varmap anymore. Free live range
9291
        info if required. Call coalesce_vars if combining temps.
9292
 
9293
2003-07-29  Andrew MacLeod  
9294
 
9295
        * tree-cfg.c (handle_switch_fallthru): Use bsi_link_after if stmt is
9296
        in a basic block.
9297
 
9298
2003-07-28  Diego Novillo  
9299
 
9300
        * opts.c (decode_options): Disable must-alias optimization.
9301
 
9302
2003-07-28  Andrew MacLeod  
9303
 
9304
        * tree-ssa.c (struct _elim_graph): Add varray for constant copies.
9305
        (new_elim_graph): Initialize constant copy array..
9306
        (eliminate_build): Push constant copies onto stack instead of emitting.
9307
        (eliminate_phi): Emit any pending constant copies.
9308
 
9309
2003-07-28  Jeff Law  
9310
 
9311
        * tree-ssa-dom.c (optimize_block): If a PHI has a single argument
9312
        that is a constant, then that creates a useful equivalence.
9313
        Propagate constant values into PHI nodes.
9314
 
9315
        * tree-flow-inline.h (may_propagate_copy): Allow RHS to be a
9316
        constant.
9317
 
9318
        * tree-dfa.c (compute_immediate_uses_for): Do not assume that
9319
        PHI arguments are SSA_NAMEs.
9320
        * tree-ssa-dce.c (process_worklist): Likewise.
9321
        * tree-ssa-copyprop.c (copyprop_phi): Likewise.  Use may_propagate_copy.
9322
        * tree-ssa-ccp.c (visit_phi_node): Do not assume that PHI arguments
9323
        are SSA_NAMEs.  Create a suitable value if a PHI argument is a
9324
        constant.
9325
 
9326
        * tree-cfg.c (move_outgoing_edges): Correctly handle case where
9327
        an edge already exists from BB1 to BB2's successor.
9328
 
9329
2003-07-27  Daniel Berlin  
9330
 
9331
        * tree.h (EREF_TEMP): Rename to EPHI_TEMP.
9332
        (tree_eref_common): Move temp to tree_ephi_node.
9333
        * tree-ssa-pre.c: Remove #if 0'd code.
9334
        Use EPHI_TEMP rather than EREF_TEMP, remove EREF_TEMP on EUSE nodes.
9335
    (finalize_1): Handle empty blocks properly.
9336
 
9337
2003-07-27  Andreas Jaeger  
9338
 
9339
        * tree.c: Convert remaining K&R prototypes to ISO C90.
9340
        * tree-dump.c: Likewise.
9341
        * tree-inline.c: Likewise.
9342
        * stmt.c (expand_asm_expr): Likewise.
9343
 
9344
        * diagnostic.h: Remove PARAMS.
9345
 
9346
2003-07-26  Paul Brook  
9347
 
9348
        * Makefile.in: Rename check-g95 to check-gfortran.
9349
        * gcc.c (default_compilers): Add entries for .f90 and .f95.
9350
        * doc/frontends.texi: Document new F95 front end.
9351
        * doc/install.texi: Ditto.
9352
        * doc/invoke.texi: Ditto.
9353
        * doc/sourcebuild.texi: Ditto.
9354
        * fortran: New front end.
9355
 
9356
2003-07-25  Jeff law  
9357
 
9358
        * tree-ssa-dom.c (optimize_block): Use may_propagate_copy.
9359
 
9360
2003-07-25  Diego Novillo  
9361
 
9362
        * opts.c (decode_options): Re-enable must-alias optimizations.
9363
 
9364
2003-07-25  Daniel Berlin  
9365
 
9366
        * configure.in:  Update BANSHEEREBUILD for PWD change.
9367
        * configure: regen
9368
 
9369
2003-07-25  Andreas Jaeger  
9370
 
9371
        * c-call-graph.c: Convert to ISO C90.
9372
        * c-common.c: Likewise.
9373
        * c-mudflap.c: Likewise.
9374
        * c-pretty-print.c: Likewise.
9375
        * cfganal.c (find_edge): Likewise.
9376
        * dependence.c: Likewise.
9377
        * diagnostic.c (debug_output_buffer): Likewise.
9378
        * except.c (expand_eh_handler): Likewise.
9379
        * fold-const.c: Likewise.
9380
        * langhooks.c: Likewise.
9381
        * tree-cfg.c (last_exec_block): Likewise.
9382
        * tree-ssa-pre.c: Likewise.
9383
        * builtins.c: Likewise.
9384
 
9385
        * tree.h: Remove remaining PARAMS.
9386
        * c-common.h: Likewise.
9387
        * c-pretty-print.h: Likewise
9388
        * c-tree.h: Likewise.
9389
        * except.h: Likewise.
9390
        * langhooks-def.h: Likewise.
9391
        * langhooks.h: Likewise.
9392
 
9393
2003-07-24  Diego Novillo  
9394
 
9395
        * tree-dfa.c (cleanup_operand_arrays): New local function.  Remove
9396
        superfluous VUSE operands.
9397
        (get_stmt_operands): Call it.
9398
 
9399
2003-07-24  Jason Merrill  
9400
 
9401
        * gimplify.c (gimple_boolify): New fn.
9402
        (gimplify_expr) : Boolify arg.
9403
        (gimplify_cond_expr): Boolify condition.
9404
        (gimplify_boolean_expr): Boolify args.
9405
        (gimple_push_cleanup): Make flag boolean.
9406
 
9407
        * tree-simple.c (is_gimple_relop): TRUTH_{AND,OR,XOR}_EXPR
9408
        are not comparisons.
9409
        (is_gimple_binary_expr): They are binary ops.
9410
 
9411
        * tree-mudflap.c (mf_build_check_statement_for): Use TRUTH_OR_EXPR
9412
        rather than BIT_IOR_EXPR.
9413
 
9414
2003-07-23  Jason Merrill  
9415
            Diego Novillo  
9416
 
9417
        * c-common.h (DECL_C_HARD_REGISTER): Replace ...
9418
        * tree.h (DECL_HARD_REGISTER): ... with this.  Update all users.
9419
 
9420
2003-07-23  Diego Novillo  
9421
 
9422
        * tree-flow-inline.h (may_propagate_copy): New function.
9423
        * tree-flow.h (may_propagate_copy): Declare.
9424
        * tree-ssa-copyprop.c (copyprop_stmt): Call it.
9425
        (get_original): Likewise.
9426
        * tree-ssa-dom.c (optimize_stmt): Likewise.
9427
 
9428
2003-07-23  Frank Ch. Eigler  
9429
 
9430
        * gcc.c (MFWRAP_SPEC): Also wrap pthread_join and pthread_exit.
9431
 
9432
2003-07-23  Steven Bosscher  
9433
 
9434
        * tree-flow-inline.h (remove_dom_child): New function.
9435
        (clear_dom_children): New function.
9436
        * tree-cfg.c (bsi_insert_on_edge_immediate): Do not clear
9437
        the annotation for the new bb, it is already memset to zero
9438
        in alloc_aux_for_block().
9439
        (move_outgoing_edges): Use dom_children() instead of looking
9440
        at the dom_children field in the basic block annotation.
9441
        * tree-ssa.c (rewrite_into_ssa): Use clear_dom_children().
9442
 
9443
        * tree-cfg.c (dump_tree_cfg): Dump to `file', not `dump_file'.
9444
 
9445
2003-07-23  Diego Novillo  
9446
 
9447
        * tree.h (DECL_ESTIMATED_INSNS): Move from c-common.h.
9448
 
9449
2003-07-23  Steven Bosscher  
9450
 
9451
        * tree-ssa-dom.c (tree_ssa_dominator_optimize): Make
9452
        found_unreachable a bool.  Create/delete hash tables for
9453
        copies and available exprs outside the main loop.  Use
9454
        htab_clean to wipe them after each iteration.
9455
 
9456
2003-07-22  Diego Novillo  
9457
 
9458
        * opts.c (decode_options): Add temporary test for environment
9459
        variable TREE_SSA_DO_PRE.
9460
        Do not disable dominator optimizations when PRE is enabled.
9461
 
9462
2003-07-22  Daniel Berlin  
9463
 
9464
        * tree-ssa-pre.c (finalize_1): Change to not use bsi_last.
9465
 
9466
2003-07-22  Daniel Berlin  
9467
 
9468
        * tree-cfg.c (remove_stmt): Revert 07-15 change. Turns out the bug is in
9469
        the reverse iterator.
9470
 
9471
2003-07-22  Diego Novillo  
9472
 
9473
        * tree-ssa-ccp.c (visit_phi_node): Assume default value of CONSTANT
9474
        if the PHI value was already constant.
9475
 
9476
2003-07-22  Andrew MacLeod  
9477
 
9478
        * c-pretty-print.c (print_call_name): Handle COND_EXPR correctly.
9479
        * tree-pretty-print.c (print_call_name): Handle COND_EXPR correctly and
9480
        handle SSA_NAME.
9481
        * tree-dfa.c (add_phi_arg, remove_phi_arg_num): Remove references to
9482
        SSA_NAME_HAS_REAL_REFS.
9483
        * tree-ssa-ccp.c (visit_phi_node): Remove SSA_NAME_HAS_REAL_REFS.
9484
        * tree-ssa-copyprop.c (copyprop_phi): Remove SSA_NAME_HAS_REAL_REFS.
9485
        * tree-ssa-live.c (register_ssa_partition): Register the PHI and it's
9486
        arguments if this variable is defined by a PHI.
9487
        (create_ssa_var_map): Only register real uses and defs, and virtual
9488
        operands of ASM_EXPR's. Remove SSA_NAME_HAS_REAL_REFS. Don't set
9489
        used flag on variables here.
9490
        (calculate_live_on_entry): Ignore constants in PHI arguments.
9491
        (calculate_live_on_exit): Ignore constants in PHI arguments.
9492
        (dump_live_info): New. Dump live range information.
9493
        * tree-ssa-live.h (dump_live_info): New prototype and flags.
9494
        * tree-ssa-pre.c (create_expr_ref, finalize_1, repair_use_injury,
9495
        code_motion): Remove SSA_NAME_HAS_REAL_REFS.
9496
        * tree-ssa.c (rewrite_operand, register_new_def): Remove real_ref
9497
        parameter and SSA_NAME_HAS_REAL_REFS.
9498
        (rewrite_block): Remove real_ref parameter from register_new_def call.
9499
        (eliminate_build): Remove SSA_NAME_HAS_REAL_REFS. Insert copy if PHI
9500
        argument is a constant. Handle irregular PHI argument ordering.
9501
        (elim_create): Remove dead code to count PHI nodes.
9502
        (assign_vars): Set used flag on variables when assigned.
9503
        (replace_variable): Eliminate dead code.
9504
        (coalesce_ssa_name): Remove SSA_NAME_HAS_REAL_REFS. Print error for
9505
        constant argument across an abnormal edge.
9506
        (eliminate_extraneous_phis): New. Remove PHI nodes which are not in
9507
        the partition.
9508
        (rewrite_out_of_ssa): Call eliminate_extraneous_phis.
9509
        (rewrite_stmt): Remove real_ref parameter from rewrite_operand and
9510
        register_new_def.
9511
        * tree.h (SSA_NAME_HAS_REAL_REFS): Remove.
9512
        (struct tree_ssa_name): Remove 'has_real_refs' field.
9513
 
9514
2003-07-22  Daniel Berlin  
9515
 
9516
        * tree-ssa-pre.c (factor_through_injuries): Take new argument specifying
9517
        whether use was injured or not (needed for SR).   Update all callers.
9518
        (maybe_find_rhs_use_for_var): Take new argument specifying which
9519
        operand to start search with.   Update all callers.
9520
        (phi_opnd_from_res): #if 0 out.
9521
        (rename_2): Ditto.
9522
        (rename_1): Ditto.
9523
        (defs_match_p): Take new arguments specifying which defs were injured.
9524
        Update all callers.
9525
        (defs_y_dom_x): Ditto.
9526
        (generate_expr_as_of_bb): Fix small memory overwrite.
9527
        (process_delayed_rename): Propagate injured flag around.
9528
        (new_rename_1): Ditto.
9529
        (finalize_1): Get correct variable names for newly created statement if
9530
        necessary due to PHI.
9531
        (repair_use_injury): Note the repair in the stats. Insert repair
9532
        in right place.
9533
        (repair_euse_injury): Fix handling of PHI_NODE.
9534
        (code_motion): Fix algorithm so it can handle using reaching_def all the
9535
        time (needed for SR).
9536
        Use reaching_def rather than EREF_TEMP.
9537
 
9538
2003-07-21  Diego Novillo  
9539
 
9540
        * tree-dfa.c (get_stmt_operands): Remove FIXME note
9541
        regarding virtual operands for ASM_EXPRs.
9542
 
9543
2003-07-21  Diego Novillo  
9544
 
9545
        * tree-dfa.c (add_def): Renamed from set_def.  Update all users.
9546
        (get_stmt_operands): Don't force ASM_EXPR operands to be virtual.
9547
        (add_stmt_operand): Allow non-assignments to create new defs.
9548
        * tree-dump.c (dump_function): Move header dump...
9549
        (dump_function_to_file): ... here.
9550
        * tree-flow-inline.h (def_ops): Renamed from def_op.  Return a
9551
        varray with all the definitions made by the statement.
9552
        Update all users.
9553
        * tree-flow.h (struct operands_d): Rename field 'def_op' to
9554
        'def_ops'.  Convert it into a varray.
9555
        * tree-must-alias.c (tree_compute_must_alias): Call
9556
        dump_function_to_file instead of dump_function.
9557
        * tree-ssa-ccp.c (tree_ssa_ccp): Likewise.
9558
        (visit_stmt): Only visit statements that make new definitions using
9559
        MODIFY_EXPR.
9560
        Definitions coming from other statements are considered VARYING.
9561
        * tree-ssa-copyprop.c (tree_ssa_copyprop): Call
9562
        dump_function_to_file instead of dump_function.
9563
        * tree-ssa-dce.c (tree_ssa_dce): Likewise.
9564
        * tree-ssa-dom.c (tree_ssa_dominator_optimize): Likewise.
9565
        (optimize_stmt): Don't abort if a statement makes more than one
9566
        definition.
9567
        Check for MODIFY_EXPR statements directly, instead of relying on
9568
        the presence of a single definition.
9569
        * tree-ssa-pre.c (tree_perform_ssapre): Call dump_function_to_file
9570
        instead of dump_function.
9571
        * tree-ssa.c (rewrite_into_ssa): Likewise.
9572
        Dump the function before dominator optimizations if TDF_DETAILS is
9573
        set.
9574
        (rewrite_stmt): Don't abort if the statement makes more than one
9575
        definition.
9576
 
9577
2003-07-21  Jeff Law  
9578
 
9579
        * tree-ssa-dom.c (tree_ssa_dominator_optimize): If we made any
9580
        blocks unreachable, repeat the dominator optimizations.
9581
        (optimize_block): Enter PHIs with a single source argument into
9582
        the const_and_copies table.  When propagating into a PHI node,
9583
        break the loop over the PHI arguments when a propagation is performed.
9584
        If the PHI agument is not an SSA_VAR, then no propagation is possible.
9585
        (optimize_stmt): If an operand is not an SSA_VAR, then no propagation
9586
        is possible/needed.
9587
 
9588
2003-07-21  Diego Novillo  
9589
 
9590
        * Makefile.in (tree-ssa-dom.o): Add dependency on $(TREE_DUMP_H).
9591
        * fold-const.c (fold): Remove unusued local variable 'invert'.
9592
        * tree-dump.c (dump_files): Add entry for -fdump-tree-dom.
9593
        * tree-flow.h (tree_ssa_dominator_optimize): Change declaration to
9594
        accept a function decl.
9595
        * tree-ssa-dom.c: Include timevar.h and tree-dump.h.
9596
        (tree_ssa_dominator_optimize): Change to receive the function decl
9597
        for the function to optimize.  Update callers.
9598
        Use own dump file instead of dumping on the .ssa dump file.
9599
        Dump function at the end.
9600
        Push and pop TV_TREE_SSA_DOMINATOR_OPTS.
9601
        * tree-ssa.c (rewrite_into_ssa): Restore check for number of times
9602
        that the rename loop has been executed.  Abort if the loop executes
9603
        more than twice.
9604
        * tree.h (enum tree_dump_index): Add TDI_dom.
9605
        * doc/invoke.texi: Document -fdump-tree-dom.
9606
 
9607
2003-07-21  Steven Bosscher  
9608
            Diego Novillo  
9609
 
9610
        * Makefile.in (install-po): Check if $CATALOGS is empty to avoid
9611
        buggy shells.
9612
        * basic-block.h (rtl_verify_flow_info): Remove.
9613
        (tree_verify_flow_info): Remove.
9614
        (verify_flow_info): Declare.
9615
        * builtins.c: Rearrange to simplify merges.  Add #if 0 around
9616
        expand_ functions that are not used in the branch and move new code
9617
        to the end of the file.
9618
        * c-opts.c (c_common_handle_option): Move handling of -fdump- to
9619
        opts.c.
9620
        * cfgloopmanip.c (loop_split_edge_with_NULL): Remove.  Update all
9621
        users.
9622
        * common.opt: Add all the tree-ssa switches.
9623
        * opts.c: Handle them.
9624
        * flags.h (flag_tree_cp): Remove unused variable.
9625
        (enum pta_type): Move from tree-must-alias.h
9626
        (flag_tree_points_to): Likewise.
9627
        * toplev.c (flag_tree_cp): Remove unused variable.
9628
        * tree-cfg.c: Move cfg_hooks structures and functions for
9629
        trees from cfghooks.c.
9630
        * tree-mudflap.c (mudflap_enqueue_decl): Don't use %D to
9631
        avoid warning about format specifiers.
9632
 
9633
2003-07-21  Diego Novillo  
9634
 
9635
        * gimplify.c (gimplify_function_tree): Move gimplification of the
9636
        function body ...
9637
        (gimplify_body): ... here.
9638
        * tree-simple.h (gimplify_body): Declare.
9639
        * tree-inline.c (initialize_inlined_parameters): If the
9640
        emitted assignment is not in GIMPLE form, gimplify the
9641
        body of assignments emitted.
9642
 
9643
2003-07-17  Jeff Law  
9644
 
9645
        * tree-dfa.c (remove_phi_arg): Update PHI_ARG_CAPACITY.
9646
 
9647
        * tree-ssa.c (mark_def_sites): Do not build the dominator tree here.
9648
        (rewrite_into_ssa): Do not depend on mark_def_sites to build the
9649
        dominator tree.   Move computation of dominance frontiers out
9650
        of main loop (even though it was only done once).  Free immediate
9651
        dominator information as soon as we're done with it.
9652
 
9653
        * tree-flow.h (remove_phi_nodes_and_edges_for_unreachable_block):
9654
        Prototype.
9655
        * tree-cfg.c (remove_phi_nodes_and_edges_for_unreachable_block): New
9656
        function extracted from remove_bb.
9657
        (remove_bb): Call remove_phi_nodes_and_edges_for_unreachable_block.
9658
 
9659
        * tree-ssa-dom.c (optimize_block): Propagate values into PHI nodes.
9660
        Do not optimize a block which has become unreachable.
9661
        If a COND_EXPR has a compile-time constant condition, then remove
9662
        outgoing from the COND_EXPR which can not execute.
9663
 
9664
2003-07-16  Frank Ch. Eigler  
9665
 
9666
        * tree-mudflap.c (mx_xfn_indirect_ref): Correct source locations
9667
        for tracked expressions by ignoring incidental decl source loci.
9668
 
9669
2003-07-16  Jeff Law  
9670
 
9671
        * tree-cfg.c (remove_bb): Remove statements in reverse order.
9672
        Simplify code to issue warnings for unreachable code.
9673
 
9674
        * tree-ssa-dom.c (get_eq_expr_value): Also enter expressions
9675
        into the available expression hash table.  Callers changed to
9676
        pass in the block_avail_exprs varray and const_and_copies hash
9677
        table.
9678
        (optimize_stmt): Allow optimization of the condition in
9679
        a COND_EXPR statement.
9680
        (lookup_avail_expr): For COND_EXPRs, just see if their condition
9681
        has been recorded into the hash table, do not enter them into
9682
        the hash table.  Only do a lookup of the result in the
9683
        const_and_copies table if it is an SSA_VAR.
9684
        (avail_expr_hash): Handle COND_EXPRs, specifically we only care
9685
        about their condition and virtual operands.
9686
        (avail_expr_eq): Likewise.  If one statement has virtual operands
9687
        and the other does not, then the expressions are not equal.
9688
 
9689
        * tree-ssa.c (rewrite_into_ssa): If we have done dominator
9690
        optimizations, then call cleanup_tree_cfg after rewriting is
9691
        complete.
9692
        * tree-ssa-dom.c (optimize_block): Get eq_expr_value for the
9693
        current block rather than having it passed in by the caller.
9694
        Propagate eq_expr_value into the false arm of a COND_EXPR.
9695
        (get_eq_expr_value): Return equivalences for the false
9696
        arm of a COND_EXPR if requested.
9697
 
9698
2003-07-16  Daniel Berlin  
9699
 
9700
        * c-decl.c (store_parm_decls): Also strip NON_LVALUE_EXPRs and
9701
        CONVERT_EXPRs when setting DECL_NONLOCAL.
9702
 
9703
2003-07-15  Daniel Berlin  
9704
 
9705
        * tree-cfg.c (remove_stmt): Update bb->end_tree_p properly when
9706
        stmt_p is the end of the bb.
9707
 
9708
2003-07-15  Jeff Law  
9709
 
9710
        * tree-ssa-dom.c (optimize_stmt): Consider two types equivalent if
9711
        their TYPE_MAIN_VARIANT is equivalent.
9712
        (avail_expr_eq): Likewise.
9713
 
9714
        * Makefile.in (OBJS): Add tree-ssa-dom.o
9715
        (tree-ssa-dom.o): Add dependencies.
9716
        (ssa.o, cfghooks.o): Use $(TREE_FLOW_H), not tree-flow.h.
9717
        * timevar.def: Add new timevar for dominator optimizer.  Reorder
9718
        slightly.
9719
        * tree-dfa.c (add_stmt_operand): Do not consider references to
9720
        static storage as volatile operands.
9721
        (add_referenced_var): Static storage items reference global memory.
9722
        * tree-ssa.c: Simplify by moving everything specific to the
9723
        dominator optimizer into tree-ssa-dom.c.  Call into the dominator
9724
        optimizer after rewriting all the basic blocks.
9725
        * tree-ssa-dom.c: New file.  Mostly extracted from tree-ssa.c
9726
        * tree-flow.h (tree_ssa_dominator_optimize): Prototype.
9727
        (dump_dominator_optimization_stats): Likewise.
9728
        (debug_dominator_optimization_stats): Likewise.
9729
 
9730
2003-07-15  Diego Novillo  
9731
 
9732
        * tree-dfa.c (add_stmt_operand): Move volatile handling...
9733
        (find_vars_r): ... here.
9734
        Mark when the walker is inside an ASM_EXPR.
9735
        (struct walk_state): Add field 'is_asm_expr'.
9736
        Change flag fields to bitfields.
9737
        (add_referenced_var): If the variable is a pointer being stored by
9738
        an ASM_EXPR, mark it as a global memory pointer.
9739
        * tree-flow-inline.h (is_optimizable_addr_expr): New function.
9740
        * tree-flow.h (is_optimizable_addr_expr): Declare it.
9741
        * tree-ssa.c (rewrite_and_optimize_stmt): Use it.
9742
        (lookup_avail_expr): Likewise.
9743
        (get_eq_expr_value): Likewise.
9744
        (avail_expr_eq): Return 'true' when comparing a statement against
9745
        itself.
9746
        * tree-ssa-dce.c (need_to_preserve_store): Move volatile checking...
9747
        (stmt_useful_p): ...here.
9748
 
9749
2003-07-15  Andreas Jaeger  
9750
 
9751
        * c-simplify.c: Convert prototypes to ISO C90.
9752
        * gimplify.c: Likewise.
9753
        * simple-break-elim.c: Likewise.
9754
        * simple-goto-elim.c: Likewise.
9755
 
9756
        * tree-alias-ander.c: Convert prototypes to ISO C90.
9757
        * tree-alias-common.c: Likewise.
9758
        * tree-alias-type.c: Likewise.
9759
        * tree-browser.c: Likewise.
9760
        * tree-dchain.c: Likewise.
9761
        * tree-mudflap.c: Likewise.
9762
        * tree-nomudflap.c: Likewise.
9763
        * tree-optimize.c: Likewise.
9764
        * tree-pretty-print.c: Likewise.
9765
        * tree-simple.c: Likewise.
9766
 
9767
        * tree-alias-common.h: Convert prototypes to ISO C90, remove extra
9768
        whitespace.
9769
        * tree-alias-type.h: Convert prototypes to ISO C90.
9770
        * tree-dchain.h: Likewise.
9771
        * tree-flow-inline.h: Likewise.
9772
        * tree-flow.h: Likewise.
9773
        * tree-iterator.h: Likewise.
9774
        * tree-mudflap.h: Likewise.
9775
        * tree-simple.h: Likewise.
9776
 
9777
2003-07-14  Daniel Berlin  
9778
 
9779
        * tree-ssa-pre.c (tree_perform_ssapre): Fix dom_children after DCE
9780
        breaks them.
9781
 
9782
2003-07-14  Diego Novillo  
9783
 
9784
        * tree-dfa.c (add_vdef): Initialize variable 'vdef'.
9785
        (add_vuse): Initialize variable 'vuse'.
9786
 
9787
2003-07-14  Diego Novillo  
9788
 
9789
        Must alias analysis.  Allow the SSA rename pass to be done on a set
9790
        of variables.
9791
 
9792
        * Makefile.in (OBJS): Add tree-must-alias.o.
9793
        * flags.h (flag_tree_must_alias): Declare.
9794
        * timevar.def (TV_TREE_MUST_ALIAS): Define.
9795
        * toplev.c (flag_tree_must_alias): Declare.
9796
        (f_options): Add entry for -ftree-must-alias.
9797
        (parse_options_and_default_flags): Enable must-alias analysis at -O1.
9798
 
9799
        * tree-cfg.c (remove_useless_stmts_and_vars): Do not remove
9800
        addressable variables.
9801
 
9802
        * tree-dfa.c (dump_file, dump_flags): New local variables to
9803
        replace tree_ssa_dump_file and tree_ssa_dump_flags.  Update every
9804
        user.
9805
        (get_stmt_operands): Clear the array of virtual operands before
9806
        scanning the statement.
9807
        (get_expr_operands): Do not add an operand for ADDR_EXPR if the
9808
        expression takes the address of a VAR_DECL or a PARM_DECL.  Instead
9809
        add the variable to the list of variables whose address has been
9810
        taken by the statement.
9811
        Allow INDIRECT_REF expressions of the form *&VAR.  Convert them
9812
        into an operand for VAR.
9813
        When processing function calls, add a VUSE for .GLOBAL_VAR if the
9814
        function is pure but not const.
9815
        (add_stmt_operand): If the operand is an ADDR_EXPR, add the
9816
        variable to the list of variables whose address has been taken by
9817
        the statement.
9818
        (add_vdef): If the statement had virtual definitions, try to find
9819
        an existing VDEF for the variable, to preserve SSA information.  If
9820
        none is found, create a new one.
9821
        (add_vuse): Likewise.
9822
        (remove_all_phi_nodes_for): New function.
9823
        (get_call_flags): New function to replace call_may_clobber.  Update
9824
        all callers.
9825
 
9826
        * tree-dump.c (dump_files): Add entry for -fdump-tree-mustalias.
9827
        * tree-flow-inline.h (addresses_taken): New function.
9828
        (is_unchanging_value): New function.
9829
 
9830
        * tree-flow.h (addresses_taken): Declare.
9831
        (remove_all_phi_nodes): Declare.
9832
        (init_tree_ssa): Declare.
9833
        (propagate_copy): Declare.
9834
        (is_unchanging_value): Declare.
9835
        (tree_compute_must_alias): Declare.
9836
 
9837
        * tree-inline.c (copy_body_r): Fold instances of *&VAR.
9838
 
9839
        * tree-must-alias.c: New file.
9840
 
9841
        * tree-optimize.c (optimize_function_tree): Call init_tree_ssa and
9842
        compute_may_aliases before calling rewrite_into_ssa.
9843
        After the SSA pass, run dead code elimination and compute
9844
        must-aliases.
9845
 
9846
        * tree-simple.c (is_gimple_call_expr): Add comment that
9847
        is_gimple_* predicates should not have side effects.
9848
 
9849
        * tree-ssa-ccp.c: Replace calls to really_constant_p with
9850
        is_unchanging_value everywhere.
9851
        (fold_stmt): Don't fold if the RHS is already a constant.
9852
 
9853
        * tree-ssa-copyprop.c (copyprop_stmt): Remove unnecessary
9854
        variable 'vuse'.
9855
        Call propagate_copy to replace the operand with its new value.
9856
        (copyprop_phi): Remove unnecessary variable 'vuse'.
9857
        (get_original): Remove unused parameter 'vuse_p'.
9858
        (propagate_copy): New function.
9859
 
9860
        * tree-ssa-dce.c (need_to_preserve_store): Update comments.
9861
 
9862
        * tree-ssa.c (dump_file, dump_flags): New local variables to
9863
        replace globals tree_ssa_dump_file and tree_ssa_dump_flags.  Update
9864
        all users.
9865
        (addr_expr_propagated_p): New local variable.
9866
        (vars_to_rename): New local variable.
9867
        (check_for_new_variables): New local function.
9868
        (rewrite_into_ssa): Add new argument VARS which is a bitmap
9869
        representing all the variables that should be renamed into SSA.  If
9870
        VARS is NULL, all the variables in the program are renamed.
9871
        Don't call init_tree_ssa nor compute_may_aliases.
9872
        Initialize all the local hash tables and bitmaps.
9873
        Add support for repeating the SSA rename process more than once.
9874
        If the dominator optimizations produced new symbols, repeat the
9875
        process.
9876
        (mark_def_sites): Ignore operands that are in SSA form already.
9877
        (insert_phi_nodes): Only add PHI nodes for variables in the
9878
        VARS_TO_RENAME bitmap.
9879
        (rewrite_block): Ignore PHI nodes that have been renamed already.
9880
        (rewrite_and_optimize_stmt): Ignore operands that are already in
9881
        SSA form.
9882
        When propagating ADDR_EXPR set addr_expr_propagated_p to 'true'.
9883
        Call propagate_copy when doing copy propagation.
9884
        Call is_unchanging_value to decide if the RHS of an assignment is a
9885
        constant.
9886
        (rewrite_stmt): Ignore operands that are already in SSA form.
9887
        (init_tree_ssa): Make external.
9888
        Move initialization of local hash tables and bitmaps to
9889
        rewrite_into_ssa.
9890
        (remove_annotations_r): Don't special case MODIFY_EXPR nodes.
9891
        (lookup_avail_expr): Call is_unchanging_value.
9892
        (get_eq_expr_value): Likewise.
9893
 
9894
        * tree.h (enum tree_dump_index): Add TDI_must_alias.
9895
 
9896
        * cp/optimize.c (optimize_function): Don't call the tree optimizers
9897
          if -fdisable-tree-ssa is given.
9898
 
9899
        * doc/invoke.texi: Add documentation for -ftree-must-alias.
9900
 
9901
2003-07-07  Jeff Law  
9902
 
9903
        * fold-const.c (nondestructive_fold_unary_to_constant: For BIT_NOT_EXPR
9904
        make sure OP0 is a suitable constant before trying to fold it.
9905
 
9906
        * tree-cfg.c (handle_switch_fallthru): Set DECL_CONTEXT for
9907
        newly created labels.
9908
 
9909
        * tree-cfg.c (move_outgoing_edges): New function.
9910
        (merge_tree_blocks): Use it.
9911
        (remove_bb): Remove the block from the pdom_info structures
9912
        as well if they exist.
9913
        (linearize_cond_expr): Move important edges from the then and
9914
        else arms to BB as appropriately
9915
 
9916
        * tree-cfg.c (remove_stmt): When removing a COMPOUND_EXPR, make
9917
        sure that any basic block pointers to the arms of the COMPOUND_EXPR
9918
        are updated.
9919
 
9920
        * tree-cfg.c (make_goto_expr_edges): Computed gotos create
9921
        abnormal edges.
9922
 
9923
2003-07-05  Daniel Berlin  
9924
 
9925
        * tree-ssa-pre.c (defs_match_p): Check for copies of the same version.
9926
 
9927
2003-07-03  Frank Ch. Eigler  
9928
 
9929
        * tree-nomudflap.c (mf_marked_p, mf_mark): New dummy functions.
9930
 
9931
2003-07-03  Jeff Law  
9932
 
9933
        * tree-ssa.c (lookup_avail_expr): Accept new argument containing the
9934
        const_and_copies table.  All callers changed.  If we find the
9935
        given expression in the availe expression hash table, then lookup
9936
        the LHS of the hash table's entry in the const_and_copies_table.
9937
        Do record type casts into the available expression table.
9938
 
9939
        * tree-nomudflap.c (mf_marked_p): Mark arguments as being unused.
9940
        (mf_mark): Likewise.
9941
 
9942
        * c-decl.c (store_parm_decls): Strip away NOP_EXPRs when looking
9943
        for hidden use variables.
9944
 
9945
2003-07-02  Frank Ch. Eigler  
9946
 
9947
        * varasm.c (build_constant_desc): Propagate mudflap marked-ness
9948
        across constant copying.
9949
 
9950
2003-07-02  Daniel Berlin  
9951
 
9952
        * tree-ssa-pre.c (tree_perform_ssapre): Don't optimize things with
9953
        volatile ops or making aliased loads right now.
9954
        (create_expr_ref): Mark the phi result of the new phi as having
9955
        real refs.
9956
        (finalize_1): Mark the new temp as having real refs.
9957
        (repair_use_injury): Ditto.
9958
        (code_motion): Ditto.
9959
 
9960
2003-07-01  Daniel Berlin  
9961
 
9962
        * tree.h (struct tree_eref_common): Add injured flag.
9963
        Add EREF_INJURED macro.
9964
 
9965
2003-07-01  Daniel Berlin  
9966
 
9967
        * tree-flow-inline.h (stmt_ann): We have stmt_ann on E*_NODE's as well,
9968
        so use is_essa_node as well.
9969
        * tree-dfa.c (create_stmt_ann): Ditto.
9970
        * tree.h (is_essa_node): Declare.
9971
        * tree.c (is_essa_node): Define.
9972
 
9973
2003-07-01  Jason Merrill  
9974
 
9975
        * tree-cfg.c (prepend_stmt_to_bb): New fn.
9976
        (bsi_insert_after): Add to the beginning of an empty block.
9977
 
9978
2003-07-01  Jeff Law  
9979
 
9980
        * expr.c (expand_expr, case COND_EXPR): Correctly (?) handle
9981
        cases where a containing block has a stack level.  Handle
9982
        cases where one arm is a GOTO_EXPR and the other arm has
9983
        side effects.
9984
 
9985
        * stmt.c (containing_blocks_have_cleanups_or_stack_level): New
9986
        function.
9987
        (any_pending_cleanups): Further simplification.
9988
        * tree.h (containing_blocks_have_cleanups_or_stack_level): Prototype.
9989
 
9990
2003-06-30  Diego Novillo  
9991
 
9992
        * tree-flow.h (struct tree_ann_common_d): Remove 'stmt' field.
9993
        Update all users.
9994
        (struct var_ann_d): Remove field 'has_real_refs'.  Update all callers
9995
        with calls to SSA_NAME_HAS_REAL_REFS.
9996
        Remove field 'occurs_in_abnormal_phi'.  Update all callers with
9997
        calls to SSA_NAME_OCCURS_IN_ABNORMAL_PHI.
9998
        * tree-flow-inline.h (var_ann): Only accept _DECL nodes.
9999
        (stmt_ann): Only accept GIMPLE statements.
10000
        (tree_stmt): Remove.  Update all users.
10001
 
10002
        * tree-cfg.c (linearize_cond_expr): Handle cases where BB doesn't
10003
        have a postdominator.
10004
        (find_contained_blocks): Do not look inside COND_EXPR_COND nor
10005
        SWITCH_COND expressions.
10006
 
10007
        * tree-dfa.c (get_stmt_operands): Force virtual operands on
10008
        ASM_EXPRs.
10009
        (get_expr_operands): Handle SSA names when adding operands for
10010
        memory tags.
10011
        (add_stmt_operand): Handle SSA names.
10012
        Move checks for volatile operands earlier in the code.
10013
        (add_vdef): Re-format for readability.
10014
        (create_var_ann): Only allow _DECL nodes.
10015
        (create_stmt_ann): Only allow GIMPLE statements.
10016
        (dump_variable): Handle SSA names.
10017
        (dump_may_aliases_for): Likewise.
10018
        (may_access_global_mem_p): Handle SSA names.
10019
        (remove_phi_arg): If the argument removed was the last one with
10020
        real references, update the LHS of the PHI node.
10021
        (add_phi_arg): If the argument added has real references, propagate
10022
        the attribute into the LHS of the PHI node.
10023
 
10024
        * tree-pretty-print.c (dump_generic_node): Only retrieve basic
10025
        block information from GIMPLE statements.
10026
        Always output the THEN and ELSE clauses of COND_EXPR nodes.
10027
 
10028
        * tree-simple.c (is_gimple_stmt): Accept PHI_NODEs.
10029
        (is_gimple_id): Accept SSA_NAMEs.
10030
 
10031
        * tree-ssa-copyprop.c (copyprop_phi): If an argument is used as a
10032
        real operand, propagate the attribute into the LHS of the PHI.
10033
 
10034
        * tree-ssa-live.c (create_ssa_var_map): Don't set 'used' flag on
10035
        both the operand and the result of VDEFs.
10036
        Only register PHI results and arguments that have been used as real
10037
        operands.
10038
        (calculate_live_on_entry): Fix formatting in debugging message.
10039
 
10040
        * tree-ssa.c (register_new_def): Add new argument
10041
        'is_real_operand'.  If it's set, set SSA_NAME_HAS_REAL_REFS for the
10042
        new name.  Update all callers.
10043
        (rewrite_operand): Add new argument 'is_real_operand'.  If it's
10044
        set, set SSA_NAME_HAS_REAL_REFS to the operand.
10045
        (eliminate_build): Ignore PHI arguments and PHI results that have
10046
        not been used in real operands.
10047
        (rewrite_vdefs): Remove.  Update all users.
10048
        (set_is_used): Don't handle SSA names.
10049
        (coalesce_ssa_name): Ignore PHI arguments that have not had real
10050
        references in the program.
10051
 
10052
        * tree.c (make_ssa_name): Update documentation.
10053
        * tree.h (IS_EMPTY_STMT): Call integer_zerop instead of comparing
10054
        against size_zero_node.
10055
        (SSA_NAME_HAS_REAL_REFS): Define.
10056
        (SSA_NAME_OCCURS_IN_ABNORMAL_PHI): Define.
10057
        (struct tree_ssa_name): Add bitfields 'has_real_refs' and
10058
        'occurs_in_abnormal_phi'.
10059
 
10060
2003-06-30  Jeff Law  
10061
 
10062
        * c-simplify.c (gimplify_c_loop): Don't return a LOOP_EXPR for
10063
        a do ... while (0) loop.
10064
 
10065
        * expr.c (expand_expr, case COND_EXPR): Be smarter about expanding
10066
        a COND_EXPR with only one useful arm, which happens to be a GOTO_EXPR.
10067
 
10068
        * tree-cfg.c (remove_useless_stmts_and_vars): Don't remove user
10069
        variables unless we're at -O2 or higher.
10070
 
10071
2003-06-30  Daniel Berlin  
10072
 
10073
        * tree-ssa-pre.c (expr_phi_insertion): Stop optimizing the expression
10074
        if we have > some very large number of ephi operands, as it will
10075
        take an ungodly amount of memory and time.
10076
        (pre_expression): Push/pop gc context so we can do gc collection
10077
        in between expressions.
10078
        Throw away expression info right after done optimizing it.
10079
 
10080
2003-06-30  Jason Merrill  
10081
 
10082
        * gimplify.c (gimplify_call_expr): Check PUSH_ARGS_REVERSED.
10083
 
10084
        * gimplify.c (gimplify_modify_expr): Also force a call with a
10085
        possible nonlocal goto into a temporary.
10086
        (gimplify_return_expr): Don't duplicate the MODIFY_EXPR.
10087
        * tree-iterator.h (tsi_one_before_end_p): New fn.
10088
 
10089
2003-06-29  Jeff Sturm   
10090
 
10091
        * fold-const.c (fold): Don't save_expr unless TREE_SIDE_EFFECTS.
10092
 
10093
2003-06-26  Diego Novillo  
10094
 
10095
        * c-simplify.c (gimplify_stmt_expr): Handle statement-expressions
10096
        that don't end in a non-void expression.  Emit a warning in that
10097
        case.
10098
 
10099
2003-06-26  Daniel Berlin  
10100
 
10101
        * tree-ssa-pre.c (fixup_domchildren): Rename from
10102
        compute_domchildren, change to not use our own array.
10103
        (domchildren): Remove variable.
10104
        (insert_occ_in_preorder_dt_order_1): Use dom_children now.
10105
        (insert_euse_in_preorder_dt_order_1): Ditto.
10106
        (search_dt_preorder): Ditto.
10107
        (handle_bb_creation): Fix to work properly.
10108
        (tree_perform_ssapre): Remove remnants of domchildren.
10109
        Redo dominator info if we have to due to a new block.
10110
 
10111
2003-06-26  Andrew MacLeod  
10112
 
10113
        * tree-cfg.c (handle_switch_split): Use a tree iterator to find the
10114
        real split point rather than a block iterator.
10115
 
10116
2003-06-26  Jason Merrill  
10117
 
10118
        * tree-simple.c (is_gimple_stmt): Complete.
10119
 
10120
2003-06-24  Jeff Law  
10121
 
10122
        * tree-cfg.c (remove_useless_stmts_and_vars): On the first
10123
        iteration, remove unused variables from BIND_EXPRs.
10124
        * tree-flow.h (var_ann_d): Add new field USED.
10125
        (set_is_used): Prototype.
10126
        (remove_useless_stmts_and_vars): Update prototype.
10127
        * tree-ssa-live.c (create_ssa_var_map): Note which variables
10128
        are used so that we can delete those which are not used.
10129
        * tree-ssa.c (create_temp): Mark the new temporary as being used.
10130
        (rewrite_out_of_ssa): Note if the call to remove_useless_stmts_and_vars
10131
        is the first iteration or not.
10132
        (set_is_used): New function.
10133
 
10134
        * c-decl.c (store_parm_decls): Variables and parameters on the
10135
        pending_sizes chain have nonlocal uses.
10136
 
10137
2003-06-25  Daniel Berlin  
10138
 
10139
        * tree-ssa-pre.c: Convert to ISO C.
10140
        (handle_bb_creation): New function.
10141
        (ephi_will_be_avail): Remove dead code.
10142
        (finalize_1): Use handle_bb_creation, start to fix edge insertion
10143
        related fun.
10144
        (maybe_find_rhs_use_for_var): Stop using tree_stmt.
10145
        (code_motion): Always get the temporary from the right place.
10146
 
10147
2003-06-24  Jason Merrill  
10148
 
10149
        * gimplify.c (gimplify_self_mod_expr): Add want_value parm.
10150
        For postfix ops, make sure it returns an rvalue.
10151
        (gimplify_expr): Copy a volatile reference into a temp.
10152
        (create_tmp_var): Require a complete type.
10153
        (create_tmp_alias_var): Use TYPE_VOLATILE on types.
10154
        * tree-simple.c (is_gimple_stmt): Flesh out a bit.
10155
        (is_gimple_val): Don't allow volatiles.
10156
 
10157
        * c-simplify.c (gimplify_expr_stmt): Don't insert a null pointer.
10158
 
10159
        * gimplify.c (gimplify_return_expr): Search through the gimple
10160
        form for the interesting MODIFY_EXPR.
10161
        (gimplify_modify_expr): Don't suppress posteffects if want_value.
10162
 
10163
2003-06-24  Diego Novillo  
10164
 
10165
        * tree-dfa.c (struct dfa_stats_d): Remove obsolete fields
10166
        num_tree_refs and size_tree_refs.  Update all users.
10167
        (dump_dfa_stats): Also dump information about VUSE and VDEF
10168
        operands.
10169
        * tree-ssa.c (rewrite_vdefs): Dump information about VDEF operators
10170
        promoted to real copies if -fdump-tree-optimized-details is given.
10171
 
10172
2003-06-23  Jeff Law  
10173
 
10174
        * tree-ssa.c (avail_expr_eq): Verify types are the same before
10175
        handing expressions to operand_equal_p.
10176
 
10177
        * tree-cfg.c (make_edges): Remove fake edges before building
10178
        extra edges for TRY_FINALLY_EXPRs.  Delete unnecessary edges
10179
        leaving the TRY block in a TRY_FINALLY_EXPR.
10180
        (find_contained_blocks): Don't consider statements in the CATCH
10181
        clause of a TRY_CATCH_EXPR when noting the last statement in
10182
        the block.
10183
        * tree-dfa.c (remove_phi_arg): If we removed the last PHI argument,
10184
        then remove the entire PHI node.
10185
        * tree-ssa-dce.c (stmt_useful_p): Consider the other EH related
10186
        nodes useful as well (TRY_FINALLY_EXPR, TRY_CATCH_EXPR, and
10187
        EH_FILTER_EXPR).
10188
 
10189
        * tree-cfg.c (remove_useless_stmts_and_vars): If the body of a
10190
        TRY_CATCH_EXPR is empty, then the entire TRY_CATCH_EXPR can
10191
        be safely removed.
10192
 
10193
        * tree-cfg.c (find_contained_blocks): Renamed from
10194
        find_contained_blocks_and_edge_targets.  Remove targets
10195
        bitmap argument and no longer record targets of edges.
10196
        All callers changed.
10197
        (make_edges): No longer need TRY_TARGETS bitmap.  Kill it.
10198
        Simplify code which creates additional edges out of the TRY
10199
        block and the FINALLY block in a TRY_FINALLY_EXPR.
10200
 
10201
2003-06-23  Diego Novillo  
10202
 
10203
        * tree-alias-common.c (ptr_may_alias_var): Don't handle memory
10204
        tags.
10205
        * tree-dfa.c (struct alias_set_d): Remove.  Update all users.
10206
        (alias_sets): Remove.  Update all users.
10207
        (struct walk_state): Remove field aliased_objects_found.
10208
        (struct alias_map_d): New.
10209
        (addressable_vars): New local variable.
10210
        (pointers): New local variable.
10211
        (add_stmt_operand): Do not force aliased variables to be in virtual
10212
        operands.
10213
        (register_alias_set): Remove.  Update all users.
10214
        (find_alias_for): Remove.  Update all users.
10215
        (get_memory_tag_for): New local function.
10216
        (num_referenced_vars): Remove.
10217
        (num_aliased_objects): Remove.  Update all users.
10218
        (aliased_objects): Remove.  Update all users.
10219
        (aliased_objects_alias_set): Remove.  Update all users.
10220
        (num_call_clobbered_vars): Remove.  Update all users.
10221
        (dump_variable): Move code to dump aliases ...
10222
        (dump_may_aliases_for): ... here.
10223
        (debug_may_aliases_for): New function.
10224
        (compute_may_aliases): Initialize 'addressable_vars' and 'pointers'
10225
        arrays.
10226
        (compute_alias_sets): Re-implement matching pointers with
10227
        addressable variables.  Limit the size of may-alias sets.
10228
        (may_alias_p): Re-implement to compare pointers against variables,
10229
        instead of memory tags.
10230
        (dump_alias_info): Re-implement to display pointers and addresable
10231
        variables arrays.
10232
        (add_referenced_var): Collect addressable variables and pointers.
10233
        Share memory tags among pointers that may alias each other.
10234
        * tree-flow.h (num_referenced_vars): Change to macro.
10235
        (referenced_var): Likewise.
10236
        (num_call_clobbered_vars): Likewise.
10237
        (call_clobbered_var): Likewise.
10238
        (dump_may_aliases_for): Declare.
10239
        (debug_may_aliases_for): Declare.
10240
        * tree-ssa.c (rewrite_vdefs): New local function.
10241
        (rewrite_out_of_ssa): Call it.
10242
 
10243
2003-06-23  Jeff Law  
10244
 
10245
        * tree-cfg.c (make_edges): Walk TRY_FINALLYs inner to outer and
10246
        simplify creation of special edges related to the TRY_FINALLY_EXPR.
10247
 
10248
        * tree-cfg.c (remove_useless_stmts_and_vars): More aggressively
10249
        remove TRY_CATCH_EXPRs and TRY_FINALLY_EXPRs.
10250
 
10251
        * tree-cfg.c (make_edges): Remove fake edges.
10252
        (make_exit_edges): Mark edges from nonreturning functions to the
10253
        exit block as being fake edges.
10254
 
10255
        * gimplify.c (gimplify_modify_expr): Don't create a new MODIFY_EXPR,
10256
        reuse the existing one.
10257
 
10258
2003-06-23  Andrew MacLeod  
10259
 
10260
        * tree-cfg.c (find_insert_location): Default case should insert after
10261
        the last stmt in the block.
10262
 
10263
2003-06-22  Jeff Sturm  
10264
 
10265
        * Makefile.in (old-tree-inline.o): Remove rule.
10266
        * old-tree-inline.c: Remove.
10267
 
10268
2003-06-19  Jeff Law  
10269
 
10270
        * tree-cfg.c (make_ctrl_stmt_edges): Do not create bogus edges
10271
        to the successor block of TRY_CATCH_EXPR, TRY_FINALLY_EXPR,
10272
        CATCH_EXPR or EH_FILTER_EXPR nodes.
10273
 
10274
        * gimplify.c (gimplify_modify_expr): If the RHS of an MODIFY_EXPR
10275
        might throw, then make sure its result goes into a temporary.
10276
 
10277
        * tree-cfg.c (handle_switch_split): Handle case where target
10278
        block has only one statement (the case label itself).
10279
 
10280
2003-06-19  Diego Novillo  
10281
 
10282
        * doc/invoke.texi: Add documentation for -ftree-dominator-opts
10283
        that was missing from an earlier patch.
10284
 
10285
2003-06-19  Jeff Sturm  
10286
 
10287
        * gimplify.c (gimplify_expr): Handle LABELED_BLOCK_EXPR
10288
        and EXIT_BLOCK_EXPR.
10289
        (gimplify_labeled_block_expr): New function.
10290
        (gimplify_exit_block_expr): New function.
10291
 
10292
2003-06-18  Andrew MacLeod  
10293
 
10294
        * tree-cfg.c (EDGE_INSERT_LOCATION_BSI_AFTER): New location code.
10295
        (cleanup_switch_expr_graph): Find default case correctly.
10296
        (bsi_insert_after): Get BB from stmt when its avialble.
10297
        (bsi_insert_before): Get BB from stmt when its avialble.
10298
        (handle_switch_fallthru): New. Handle edge from switch to the fallthru.
10299
        (handle_switch_split): Re-implement using new scheme.
10300
        (find_insert_location): Use handle_switch_fallthru ().
10301
        (bsi_insert_on_edge_immediate): Handle EDGE_INSERT_LOCATION_BSI_AFTER.
10302
        * tree-iterator.h (tsi_last): New. Find last stmt in a chain.
10303
 
10304
2003-06-17  Daniel Berlin  
10305
 
10306
        * tree-alias-common.c (find_func_aliases): Guard cast op
10307
        properly.
10308
        (ptr_may_alias_var): Small optimization to avoid calling
10309
        decl_function_context so often.
10310
        * tree-alias-ander.c (ander_simple_assign): Ignore if lhs == rhs.
10311
 
10312
2003-06-17  Steven Bosscher  
10313
 
10314
        * timevar.def (TV_TREE_BUILD_FUD_CHAINS): Remove.
10315
 
10316
2003-06-16  Diego Novillo  
10317
 
10318
        * tree-ssa-ccp.c (DONT_SIMULATE_AGAIN): Define.
10319
        (visit_phi_node): Don't do anything if the PHI node doesn't need to
10320
        be simulated.
10321
        If the PHI variable does not have real references, consider it
10322
        VARYING.
10323
        If the PHI node has a lattice value of VARYING, set
10324
        DONT_SIMULATE_AGAIN.
10325
        (visit_stmt): Don't do anything if the statement doesn't need to be
10326
        simulated.
10327
        Only visit conditional branches COND_EXPR and SWITCH_EXPR.
10328
        If the statement doesn't produce a result mark it with
10329
        DONT_SIMULATE_AGAIN.
10330
        (visit_assignment): Remove unnecessary def_op() check.
10331
        If the value is VARYING, mark the statement with
10332
        DONT_SIMULATE_AGAIN.
10333
        (visit_cond_stmt): Remove unnecessary is_ctrl_stmt() check.
10334
        If the predicate is VARYING, mark the statement with
10335
        DONT_SIMULATE_AGAIN.
10336
        (initialize): Clear DONT_SIMULATE_AGAIN flag for every statement
10337
        and PHI node.
10338
        (likely_value): Get statement operands after checking if it makes
10339
        aliased loads or has volatile operands.
10340
 
10341
2003-06-16  Jeff Law  
10342
            Jason Merrill  
10343
 
10344
        * except.c (enum eh_region_type): Don't declare the enumeration
10345
        members here.  Instead do it in except.h.
10346
        (expand_eh_hander): Use expr_first instead of open-coding it.
10347
        * except.h (enum eh_region_type): Define the enumeration memebers
10348
        here.
10349
        * tree-cfg.c (last_exec_block): Break out from make_edges.
10350
        (could_trap_p): No longer static.
10351
        (get_eh_region_type): New function.
10352
        (make_try_expr_blocks): Keep the whole TRY_CATCH_EXPR or
10353
        TRY_FINALLY_EXPR instead of just the handler part in the
10354
        EH_STACK varray.  For a cleanup, record which cleanup higher
10355
        in the EH_STACK it can reach.
10356
        (make_edges): Use last_exec_block.
10357
        (make_ctrl_stmt_edges): Thread cleanups as needed.
10358
        (compute_reachable_eh):  Use get_eh_region_type.  Properly
10359
        track when we can skip cleanups.  Skip cleanups when possible.
10360
        * tree-flow.h (could_trap_p): Prototype.
10361
 
10362
2003-06-16  Andrew Macleod  
10363
 
10364
        * tree-cfg.c (find_insert_location): Check for control_altering stmts,
10365
        and abort if its an unrecognized BB ending stmt.
10366
        (bsi_commit_first_edge_insert): Rename to bsi_insert_on_edge_immediate,
10367
        externalize, and change the interface to an on-demand inserter.
10368
        (bsi_commit_edge_inserts): Call bsi_insert_on_edge_immediate().
10369
        * tree-flow.h (bsi_insert_on_edge_immediate): Prototype.
10370
        * tree-pretty-print.c (dump_block_info): Add 'ab' for abnormal edges.
10371
        * tree-ssa-dce.c (process_worklist): Use sparse bitmaps.
10372
        * tree-ssa-live.c (calculate_live_on_entry): Abort if ssa_name has a
10373
        definition, but is also live on entry.
10374
        * tree-ssa.c (coalesce_ssa_name): Call abort() instead of error(), and
10375
        provide more detailed info.
10376
        (rewrite_out_of_ssa): Provide CFG dumps before and after rewritting.
10377
 
10378
2003-06-16  Frank Ch. Eigler  
10379
 
10380
        * tree-mudflap.c (mf_mark): Use GC-compatible htab_create_ggc.
10381
 
10382
2003-06-15  Jeff Law  
10383
 
10384
        * tree-ssa-ccp.c (visit_phi_node): If the PHI is already known
10385
        to be varying, don't recompute its value.
10386
 
10387
2003-06-14  Jeff Law  
10388
            Jason Merrill 
10389
 
10390
        * tree-cfg.c (make_blocks): Do not return early if presented
10391
        with an empty statement.
10392
        (make_ctrl_stmt_edges):  Do not try to optimize an empty TRY
10393
        block in a TRY_FINALLY_EXPR.  Simplify TRY_FINALLY_EXPR,
10394
        TRY_CATCH_EXPR, CATCH_EXPR, and EH_FILTER_EXPR now that empty
10395
        statements are no longer shared.
10396
 
10397
2003-06-14  Kazu Hirata  
10398
 
10399
        * tree-ssa-pre.c: Fix a comment typo.
10400
 
10401
2003-06-13  Diego Novillo  
10402
 
10403
        * tree-dfa.c (get_stmt_operands): Abort if the statement is a
10404
        variable.
10405
        (create_var_ann): Abort if the variable is not a _DECL node.
10406
 
10407
2003-06-13  Frank Ch. Eigler  
10408
 
10409
        * tree-mudflap.c (mudflap_c_function): Change calling conventions so
10410
        as to return the instrumented function body rather than changing the
10411
        given fndecl in place.  Gimplify at the very end, for cosmetic
10412
        reasons.
10413
        * tree-mudflap.h, tree-nomudflap.c: Corresponding changes.
10414
        * c-decl.c (c_expand_body_1): Call mudflap_c_function just before
10415
        rtl expansion of function body; don't interfere with inlining.
10416
 
10417
2003-06-13  Diego Novillo  
10418
 
10419
        * c-simplify.c: Fix typo in previous change.
10420
 
10421
2003-06-13  Diego Novillo  
10422
 
10423
        * c-common.c, c-common.h, c-decl.c, c-lang.c, c-simplify.c,
10424
        flags.h, gimplify.c, langhooks-def.h, langhooks.c, langhooks.h,
10425
        simple-break-elim.c, simple-goto-elim.c, toplev.c,
10426
        tree-alias-common.c, tree-cfg.c, tree-dfa.c, tree-dump.c,
10427
        tree-inline.c, tree-mudflap.c, tree-simple.c, tree-simple.h,
10428
        tree-ssa-ccp.c, tree-ssa-pre.c, tree-ssa.c, tree.h, doc/invoke.texi:
10429
        Rename SIMPLE to GIMPLE everywhere.
10430
 
10431
2003-06-13  Andrew MacLeod  
10432
 
10433
        * tree-cfg.c (bsi_commit_first_edge_insert): Only consider non-abnormal
10434
        edges when determining whether an edge needs to be split.
10435
 
10436
        * tree-ssa-dce.c (process_worklist): When checking for GOTO and
10437
        COND_EXPR's that are necessary, check each BB's predecessors only once.
10438
 
10439
2003-06-12  Jeff Law  
10440
 
10441
        * tree-ssa.c (avail_expr_eq): Add some checking code to
10442
        detect when equal expressions have different hash values.
10443
 
10444
        * tree.c (iterative_hash_expr): Don't hash types associated
10445
        with conversions.  Instead hash on the signedness of the
10446
        toplevel object and the operand of the conversion.
10447
 
10448
        * Makefile.in (gimplify.o): Depend on $(RTL_H).  Ugh.
10449
        * gimplify.c: Include "rtl.h".
10450
        (simplify_call_expr): Use call_expr_flags and check for ECF_CONST
10451
        rather than checking bits in the tree node directly.
10452
 
10453
        * fold-const.c (operand_equal_p): CALL_EXPRs with side effects
10454
        are never equal.
10455
 
10456
2003-06-11  Frank Ch. Eigler  
10457
 
10458
        * gcc.c (MFWRAP_SPEC): Always wrap main().
10459
        * tree-mudflap.c (mudflap_enqueue_decl): Mark enqueued decls
10460
        to prevent their repeated processing.
10461
 
10462
2003-06-11  Daniel Berlin  
10463
 
10464
        * tree-ssa-pre.c: add graph_dump_file, graph_dump_flags.
10465
        (finalize_1): Modify to use temporary in expr_info structure,
10466
        remove temporary from arguments.
10467
        Use bsi_insert_on_edge for ephi insertions.
10468
        Set EREF_TEMP on inserted euses.
10469
        (repair_phi_injury): Note (to dump file)  injuries we have
10470
        repaired already.
10471
        (repair_use_injury): Ditto.
10472
        (repair_euse_injury): Ditto.
10473
        (count_stmts_in_bb): Count both forwards and backwards, and make
10474
        sure the numbers agree. This makes sure both the head and end are
10475
        updated properly.
10476
        (code_motion): Use the EREF_TEMP, rather than calculating the
10477
        reaching def, when possible, because it's faster.
10478
        Add the phi we created when we insert the ephi.  We should always
10479
        be able to get the reaching def of the ephi from EREF_TEMP (since
10480
        the args should have already been inserted, or in the case of
10481
        phi's, have a phi already allocated), so abort if we can't.
10482
        (create_expr_ref): Take expr_info parameter.  Make a phi for the
10483
        ephi's, but don't add to the bb yet. Update all callers.
10484
        (get_default_def): New function.
10485
        (get_reaching_def): Use it to find the default def when we hit the
10486
        top of the dom tree.
10487
        (struct expr_info): Add temp.
10488
        (new_rename_1): Dump out occurrences after rename 1, but before
10489
        rename 2.
10490
        (requires_edge_placement): Now that we can insert on edges, we
10491
        shouldn't need this, so make it always return false.
10492
        Will remove unless something bad comes up.
10493
        (pre_expression): Start working on dumping the redundancy graph.
10494
 
10495
        * tree.h (struct treeeref_common): Add the temp member.
10496
        Add EREF_TEMP macro.
10497
        (tree_dump_index): Reorder to match actual optimization order.
10498
        Add TDI_predot.
10499
 
10500
        * tree-dump.c: Ditto.
10501
 
10502
2003-06-11  Jeff Law  
10503
 
10504
        * gimplify.c (simplify_call_expr): Clear TREE_SIDE_EFFECTS for
10505
        calls to "const" functions.
10506
 
10507
        * tree-inline.c (expand_call_inline): Recalculate TREE_SIDE_EFFECTS
10508
        properly when inlining gimplified functions.
10509
 
10510
        * fold-const.c (operand_equal_p): Handle CALL_EXPRs.
10511
 
10512
        * tree-cfg.c (first_exec_block): Kill.
10513
        (make_edges): Use bb_for_stmt rather than first_exec_block.
10514
        (make_ctrl_stmt_edges, make_exit_edges): Likewise.
10515
        (make_loop_expr_edges, make_cond_expr_edges): Likewise.
10516
        (successor_block): Don't skip empty statements.
10517
 
10518
        * tree-ssa.c (rewrite_and_optimize_stmt): Do not special case
10519
        CALL_EXPRs they're caught by the TREE_SIDE_EFFECTS test.
10520
 
10521
        * tree-ssa.c (rewrite_and_optimize_stmt): Improve/correct setting of
10522
        may_optimize_p.  Simplify later code knowing may_optimize_p is
10523
        correctly set.
10524
        (avail_expr_hash): Do not use iterative_hash_object or deal with
10525
        SSA names for real operands.  Instead use iterative_hash_expr
10526
        which handles both.
10527
        (avail_expr_eq): Use operand_equal_p to test for equality.
10528
 
10529
2003-06-11  Steven Bosscher  
10530
 
10531
        * tree-flow.h, tree-ssa-ccp.c, tree-ssa-copyprop.c,
10532
        tree-ssa-dce.c, tree-ssa-live.c, tree-ssa-live.h:
10533
        Convert function prototypes to ISO C.
10534
 
10535
2003-06-10  Jeff Law  
10536
 
10537
        * toplev.c (parse_options_and_default_flags): Fix typo in last change.
10538
 
10539
        * gimplify.c (simplify_expr, case BIT_FIELD_REF): Make sure
10540
        to call recalculate_side_effects after gimplifying the
10541
        operands.
10542
 
10543
2003-06-10  Diego Novillo  
10544
 
10545
        * toplev.c (flag_tree_dom): New variable.
10546
        (f_options): Add new entry for -ftree-dominator-opts.
10547
        (parse_options_and_default_flags): Enable flag_tree_dom for
10548
        -O1 and higher.  At -O2 and higher, disable flag_tree_dom is
10549
        SSA-PRE is also specified.
10550
        * flags.h (flag_tree_dom): Declare.
10551
        * doc/invoke.texi: Document -ftree-dominator-opts.
10552
        * tree-ssa.c (rewrite_block): Disable tracking of available
10553
        expressions when not doing dominator optimizations.
10554
        Call rewrite_stmt when not doing dominator optimizations.
10555
        Otherwise, call rewrite_and_optimize_stmt.
10556
        (rewrite_stmt): Don't optimize the statement.  Just rename.
10557
        (rewrite_and_optimize_stmt): Optimize the statement while rewriting
10558
        its operands.
10559
        (lookup_avail_expr): Update comments.
10560
 
10561
2003-06-10  Andrew Haley  
10562
 
10563
        * c-simplify.c (c_simplify_stmt): case ASM_STMT: Ensure qualifiers
10564
        come from input statement.
10565
 
10566
2003-06-09  Andrew MacLeod  
10567
 
10568
        * tree-cfg.c (handle_switch_split): Update PHI nodes when splitting.
10569
        (tree_split_edge): Update PHI nodes in destination block.
10570
 
10571
2003-06-09  Steven Bosscher  
10572
 
10573
        * basic-block.h, tree-dfa.c, tree-ssa.c, tree-cfg.c,
10574
        tree-flow.h: Convert function prototypes to ISO C.
10575
 
10576
2003-06-09  Daniel Berlin  
10577
 
10578
        * tree-cfg.c (bsi_commit_edge_inserts): Fix computation of
10579
        new_blocks.
10580
 
10581
2003-06-08  Diego Novillo  
10582
 
10583
        * tree-cfg.c (handle_switch_split): Don't allocate basic block
10584
        annotations more than once.
10585
        (bsi_commit_first_edge_insert): Likewise.
10586
 
10587
2003-06-07  Jeff Sturm  
10588
 
10589
        * tree-cfg.c (could_trap_p): New function.
10590
        (stmt_ends_bb_p): Handle flag_non_call_exceptions.
10591
        (make_exit_edges): Handle flag_non_call_exceptions.
10592
        (is_ctrl_altering_stmt): Handle flag_non_call_exceptions.
10593
        * tree-inline.c (walk_tree): Add case for CHAR_TYPE.
10594
        * tree-ssa-dce.c (stmt_useful_p): Keep all CATCH_EXPRs.
10595
 
10596
2003-06-05  Jason Merrill  
10597
 
10598
        * stmt.c (asm_op_is_mem_input): New fn.
10599
        * tree.h: Declare it.
10600
        * gimplify.c (simplify_asm_expr): Call resolve_asm_operand_names.
10601
        Use is_simple_modify_expr_lhs for mem input ops.
10602
 
10603
2003-06-05  Frank Ch. Eigler  
10604
 
10605
        * c-mudflap.c (mflang_register_call): Give the synthetic decl
10606
        undefined (not zero) size.
10607
 
10608
2003-06-05  Frank Ch. Eigler  
10609
 
10610
        * tree-mudflap.c (mx_flag): Remove.  Update callers to use mf_mark.
10611
        (TREE_MUDFLAPPED_P): Remove.  Update callers to use mf_marked_p.
10612
        (mf_mark, mf_marked_p): Replacement functions to replace old node
10613
        marking based on tree flag-bits.
10614
        (mf_mostly_copy_tree_r): Preserve markedness across copies.
10615
        * tree-mudflap.h: Add new decls
10616
        * c-mudflap.c (mx_flag): Remove.  Update callers to use mf_mark.
10617
 
10618
2003-06-04  Diego Novillo  
10619
 
10620
        * tree-dfa.c (add_stmt_operand): Always consider non-scalar types
10621
        virtual operands.
10622
 
10623
2003-06-04  Andrew MacLeod  
10624
 
10625
        * toplev.c (parse_options_and_default_flags): Turn tree_copyprop on by
10626
        default.
10627
        * tree-cfg.c (linearize_control_structures, linearize_cond_expr,
10628
        replace_stmt, merge_tree_blocks, remap_stmts): Fix PROTOS.
10629
        (find_insert_location): Add additional basic block parameter. Handle
10630
        switch stmts.
10631
        (handle_switch_split): New. Split edges to switch labels.
10632
        (bsi_commit_first_edge_insert): Add extra parameter to
10633
        find_insert_location call. Fix split block chaining in THEN & ELSE.
10634
        * tree-ssa-live.c (calculate_live_on_entry): Process all PHI def's
10635
        after all the arguments have been processed.
10636
        * tree-ssa.c (struct ssa_stats_d, struct loops *loops, var_is_live,
10637
        rewrite_into_ssa): Remove old UNSSA code.
10638
        (rewrite_block): Remove stmt is rewrite_stmt returns 1.
10639
        (assign_vars): Remove abort and enable overlapping live ranges.
10640
        (replace_variable): New. Replace SSA name with the partition variable.
10641
        (rewrite_out_of_ssa): Use replace_variable().
10642
        (dump_tree_ssa_stats): Remove old UNSSA code.
10643
        (rewrite_stmt): Return 1 if stmt should be deleted. Remove old
10644
        UNSSA code.
10645
 
10646
2003-06-03  Diego Novillo  
10647
 
10648
        * gimplify.c (simplify_call_expr): Move code to mark MD builtins
10649
        non-simplifiable...
10650
        * tree-simple.c (is_simple_call_expr): ... here.
10651
 
10652
2003-06-03  Diego Novillo  
10653
 
10654
        * c-parse.in: Fix botched merge.
10655
 
10656
2003-06-03  Diego Novillo  
10657
 
10658
        * tree-mudflap.c (MARK_TREE_MUDFLAPPED, TREE_MUDFLAPPED):
10659
        Use TREE_VISITED instead of TREE_BOUNDED.
10660
        * c-mudflap.c (TREE_MUDFLAPPED): Likewise.
10661
        * tree-pretty-print.c (dump_generic_node): Remove
10662
        references to TYPE_QUAL_BOUNDED.
10663
 
10664
2003-06-03  Jason Merrill  
10665
 
10666
        * gimplify.c (simplify_cond_expr): Call truthvalue_conversion
10667
        before invert_truthvalue.
10668
 
10669
2003-06-02  Daniel Berlin  
10670
 
10671
        * tree-dfa.c (compute_may_aliases): Call delete_alias_vars whenever we
10672
        call create_alias_vars.
10673
 
10674
        * tree-alias-common (ptr_may_alias_var): Cleanup determination of
10675
        global vars and whatnot.
10676
 
10677
2003-06-02  Diego Novillo  
10678
 
10679
        * Makefile.in (tree-ssa.o, tree-cfg.o): Add dependency on cfgloop.h
10680
        (tree-optimize.o): Remove dependency on cfgloop.h.
10681
        * basic-block.h (struct basic_block_def): Fix documentation for
10682
        field 'loop_father'.
10683
        * tree-dfa.c (add_referenced_var): Fix type of element
10684
        pushed into aliased_objects_alias_set.
10685
        * tree-optimize.c: Don't include cfgloop.h
10686
        (optimize_function_tree): Move code to initialize loop optimizer...
10687
        * tree-cfg.c (build_tree_cfg): ... here.
10688
        * tree-ssa.c: Include cfgloop.h.
10689
        (loops): New file local variable.
10690
        (rewrite_into_ssa): Initialize/finalize loop optimizer.
10691
        (rewrite_stmt): Call var_is_live when processing redundant
10692
        assignments to the same LHS.
10693
        (var_is_live): Add heuristic to discover overlapping definitions in
10694
        loops that do not have PHI nodes for VAR at the loop header.
10695
 
10696
2003-06-02  Jason Merrill  
10697
 
10698
        * gimplify.c (simplify_expr): Only allow a cast from a 'val'.
10699
        * tree-simple.c (is_simple_cast): Likewise.
10700
 
10701
2003-06-02  Andrew MacLeod  
10702
 
10703
        * tree-cfg.c (bsi_insert_before): Update end of block pointer if we
10704
        inserted before the last stmt in a block. (The container changed).
10705
        * tree-ssa.c (elim_backward): Inserting copy should be within
10706
        conditional check.
10707
        (elim_create): Only select one bit instead of the all.
10708
 
10709
2003-06-01  Jason Merrill  
10710
 
10711
        * Makefile.in: Remove lots of -Wno-error targets.
10712
 
10713
        * tree-simple.c (recalculate_side_effects): Check TREE_THIS_VOLATILE.
10714
 
10715
        * gimplify.c (simplify_compound_lval): Call
10716
        recalculate_side_effects on each of the subexpressions.
10717
 
10718
        * expr.c (expand_expr) : Use the if-statement code if
10719
        it's void.
10720
 
10721
2003-06-01  Daniel Berlin  
10722
 
10723
        * tree-alias-common.c: Remove setting of DECL_CONTEXT in temp vars,
10724
        it's done in create_tmp_alias_var for us.
10725
        (ptr_may_alias_var): Check if the variables are memory tags, and get
10726
        the associated pointers if they are.
10727
 
10728
2003-05-30  Frank Ch. Eigler  
10729
 
10730
        * tree-mudflap.c (mudflap_c_function, enqueue_constant, enqueue_decl):
10731
        Rework dumping logic.
10732
 
10733
2003-05-27  Jason Merrill  
10734
 
10735
        * tree-ssa.c (avail_expr_hash): Simplify by using iterative_hash_expr
10736
        in more places.
10737
        * tree.c (iterative_hash_expr): Handle SSA_NAME.
10738
 
10739
2003-05-29  Jeff Law  
10740
 
10741
        * tree-ssa.c (rewrite_stmt): Detect and remove redundant
10742
        memory loads.
10743
        (avail_expr_hash): Use iterative_hash_expr, not iterative_hash_object
10744
        as needed.
10745
 
10746
2003-05-27  Jason Merrill  
10747
 
10748
        * gimplify.c (shortcut_cond_expr): Avoid jumps to jumps.
10749
 
10750
2003-05-26  Jason Merrill  
10751
 
10752
        * c-simplify.c (simplify_switch_stmt): A SWITCH_EXPR also gets the
10753
        source location of its first line.
10754
 
10755
2003-05-24  Diego Novillo  
10756
 
10757
        Do not consider INDIRECT_REF nodes to be variables.
10758
 
10759
        * gimplify.c (create_tmp_alias_var): Allow temporaries of
10760
        ARRAY_TYPE to be created.
10761
        Create new temporaries with function scope.
10762
        Don't call build_type_variant.
10763
        Mark the temporary volatile if its type is volatile.
10764
 
10765
        * tree-dfa.c: Change every function that received a variable and
10766
        its base symbol to just receive the variable.  Update all callers.
10767
        (struct alias_set_d): Remove field 'tag_sym'.
10768
        Add documentation for fields.
10769
        (struct walk_state): Add field 'is_indirect_ref'.
10770
        Add documentation for fields.
10771
        (opf_ignore_bp): Remove.  Update all users.
10772
        (aliased_objects_base): Remove.  Update all users.
10773
        (get_stmt_operands): If the statement had virtual operands, do not
10774
        scan them again.
10775
        (get_expr_operands): Handle INDIRECT_REF nodes by adding an operand
10776
        for the memory tag represented and a use for the base pointer.
10777
        Don't add VUSE operands for pointer arguments to functions.
10778
        Force a virtual operand when processing ADDR_EXPR nodes.
10779
        (add_stmt_operand): If the variable is an alias tag, always add it
10780
        as a virtual operand.
10781
        Remove code to handle INDIRECT_REF nodes.
10782
        Move code to determine if a pointer may point to global memory to
10783
        find_vars_r.
10784
        Set has_volatile_ops flag in the statement when adding operands for
10785
        globals and local statics.
10786
        If the variable is an alias tag, mark the statement as making
10787
        aliased loads or stores.
10788
        (set_def): Mark the variable as having real references.
10789
        (add_use): Likewise.
10790
        (add_vdef): Remove code to re-add previous virtual operands.
10791
        If PREV_VOPS is set, don't add a new virtual operand.
10792
        (add_vuse): Likewise.
10793
        (dump_variable): Show annotation bitfields 'mem_tag',
10794
        'occurs_in_abnormal_phi', 'is_alias_tag' and 'is_stored'.
10795
        (compute_may_aliases): Initialize walk_state.is_indirect_ref to 0.
10796
        (compute_alias_sets): Don't remove alias sets with exactly one
10797
        entry.
10798
        (register_alias_set): Re-implement to support memory tags instead
10799
        of INDIRECT_REF nodes.  Document algorithm.
10800
        (find_alias_for): Likewise.
10801
        (may_alias_p): Likewise.
10802
        (add_may_alias): Likewise.
10803
        (find_vars_r): If a pointer assignment is found and the RHS of the
10804
        assignment may access global memory, mark the pointer as pointing
10805
        to global memory.
10806
        Handle INDIRECT_REF nodes by marking the base pointer as
10807
        dereferenced.
10808
        Do not share INDIRECT_REF nodes.
10809
        (add_referenced_var): Don't handle INDIRECT_REF nodes.
10810
        If called from a store operation, mark the variable as stored.
10811
        By default mark the variable as not having real references.
10812
        When processing a pointer that has been dereferenced, create a
10813
        memory tag for the pointer.
10814
        (add_indirect_ref_var): Remove.  Update all callers.
10815
        (get_virtual_var): Don't handle INDIRECT_REF nodes.
10816
        (find_hidden_use_vars_r):
10817
 
10818
        * tree-flow-inline.h (get_var_ann): New function.  Change all
10819
        functions that called var_ann and create_var_ann to call
10820
        get_var_ann.
10821
        (get_stmt_ann): Likewise.
10822
        (set_indirect_ref): Remove.  Update all callers.
10823
        (indirect_ref): Remove.  Update all callers.
10824
        (create_indirect_ref): Remove.  Update all callers.
10825
 
10826
        * tree-flow.h (struct var_ann_d): Remove fields 'is_loaded',
10827
        'unused' and 'indirect_ref'.
10828
        Add fields 'mem_tag', 'is_mem_tag', 'is_alias_tag' and
10829
        'has_real_refs'.
10830
        (get_var_ann, get_stmt_ann): Declare.
10831
        (create_indirect_ref, set_indirect_ref, indirect_ref): Remove.
10832
 
10833
        * tree-pretty-print.c (dump_generic_node): Don't handle
10834
        INDIRECT_REF nodes inside SSA_NAME nodes.
10835
 
10836
        * tree-simple.c (get_base_symbol): Don't handle INDIRECT_REF nodes.
10837
        (is_simple_unary_expr): Don't call STRIP_NOPS.
10838
 
10839
        * tree-ssa-copyprop.c (get_original): Don't handle INDIRECT_REF
10840
        nodes.  Allow pointers to be copy propagated.
10841
 
10842
        * tree-ssa-dce.c (need_to_preserve_store): Don't handle
10843
        INDIRECT_REF nodes.
10844
 
10845
        * tree-ssa-live.c (create_ssa_var_map): Only process variables that
10846
        have real references.
10847
 
10848
        * tree-ssa.c: Update documentation regarding INDIRECT_REF nodes.
10849
        (update_indirect_ref_vuses): Remove.  Update all users.
10850
        (update_pointer_vuses): Remove.  Update all users.
10851
        (MAY_COPYPROP_P): Remove.  Update all users.
10852
        (create_temp): Don't handle INDIRECT_REF nodes.
10853
        (coalesce_ssa_name): Ignore variables that have no real references.
10854
        (rewrite_stmt): Mark the statement modified if a new copy or
10855
        constant was propagated into it.
10856
        Don't special-case pointers.
10857
        (rewrite_operand): Don't handle INDIRECT_REF nodes.
10858
        * tree.h (SSA_VAR_P): Remove.  Update all users.
10859
        (SSA_DECL_P): Rename to SSA_VAR_P.
10860
 
10861
2003-05-22  Jeff Law  
10862
 
10863
        * gimplify.c (simplify_expr): Avoid gimplifying expressions which
10864
        are already in gimple form.
10865
        * tree-simple.c (is_simple_constructor): No longer treat TREE_STATIC
10866
        constructors specially.
10867
        (is_simple_addr_expr_arg): If we're taking the address of a label
10868
        for the first time, then the ADDR_EXPR is not in gimple form.
10869
 
10870
2003-05-22  Jason Merrill  
10871
 
10872
        * tree-cfg.c (compute_reachable_eh): Don't skip cleanups.
10873
 
10874
        * tree-dfa.c (add_referenced_var): Read-only INDIRECT_REFs can
10875
        also be clobbered by function calls.
10876
 
10877
2003-05-22  Jeff Law  
10878
 
10879
        * expr.c (convert_move): Avoid making silly copies.
10880
        (expand_expr, case BIND_EXPR): Correctly determine when the
10881
        result of the BIND_EXPR will not be used.
10882
 
10883
2003-05-21  Jason Merrill  
10884
 
10885
        * tree-cfg.c (compute_reachable_eh): Handle multiple CATCH_EXPRs.
10886
 
10887
        * builtins.c (simplify_builtin_next_arg): Split out from...
10888
        (expand_builtin_next_arg): ...here.
10889
        (simplify_builtin_va_start): Split out from...
10890
        (expand_builtin_va_start): ...here.
10891
        (simplify_builtin): Call it.
10892
        * gimplify.c (simplify_call_expr): If simplify_builtin worked,
10893
        just return.
10894
 
10895
2003-05-20  Jason Merrill  
10896
 
10897
        * gimplify.c (shortcut_cond_expr, shortcut_cond_r): Rewrite.
10898
        (simplify_cond_expr): Also invert ifs with no 'then'.
10899
        (build_and_jump): New fn, split out from...
10900
        (gimplify_exit_expr): ...here.  Don't bother gimplifying the
10901
        condition.
10902
 
10903
        * gimplify.c (simplify_save_expr): Add post-effects to the
10904
        postqueue.
10905
 
10906
        * gimplify.c (mostly_copy_tree_r): Don't unshare constants.
10907
 
10908
2003-05-20  Jeff Law  
10909
 
10910
        * expr.c (expand_expr, case COND_EXPR): Avoid useless RTL generation
10911
        when the THEN or ELSE arm is empty.
10912
 
10913
        * tree-cfg.c (make_loop_expr_blocks): Do not accept next_block_link
10914
        as an argument, make it a local variable.  Callers changed.
10915
 
10916
        * tree-cfg.c (remove_useless_stmts_and_empty_vars): Eliminate
10917
        GOTO_EXPRs which jump to the next statement occuring in an
10918
        outer control/block structure nest.
10919
 
10920
2003-05-20  Diego Novillo  
10921
 
10922
        * tree-ssa-ccp.c (set_rhs): Fix typo in handling of
10923
        RETURN_EXPR nodes.
10924
 
10925
2003-05-19  Daniel Berlin  
10926
 
10927
        * tree-alias-common.c (alias_get_name): Handle unnamed variables once
10928
        and for all.
10929
 
10930
2003-05-19  Jeff Law 
10931
 
10932
        * tree-ssa-dce.c (remove_conditional): If the conditional's block
10933
        has no post dominator in the CFG, then wire it to the exit node.
10934
        Avoid unnecessary check of bb->succ.
10935
 
10936
2003-05-17  Daniel Berlin  
10937
 
10938
        * tree-pretty-print.c (MASK_POINTER): Parameter is P, not node.
10939
 
10940
2003-05-17  Daniel Berlin  
10941
 
10942
        * tree-alias-common.c (get_alias_var): Handle REFERENCE_EXPR.
10943
        (find_func_aliases): Ditto.
10944
        (get_alias_var): Use POINTER_TYPE_P.
10945
 
10946
2003-05-16  Frank Ch. Eigler  
10947
 
10948
        * gcc.c (cc1_options): Correct "-fmudflapth" handling.
10949
        * tree-mudflap.c (mudflap_c_function, mf_build_check_statement_for):
10950
        Use locally cached mask/shift values only in single-threaded mode.
10951
 
10952
2003-05-16  Daniel Berlin  
10953
 
10954
        * tree-alias-common.c (ptr_may_alias_var): Fix DECL_CONTEXT
10955
        checking.
10956
 
10957
2003-05-16  Andrew MacLeod  
10958
 
10959
        * tree-flow.h (ssa_make_edge): Remove prototype.
10960
        * tree-ssa-dce.c (remove_dead_stmt): Change comment about removing
10961
        conditionals.
10962
        (remove_conditional): Don't update PHI nodes or call ssa_make_edge.
10963
        * tree-ssa.c (ssa_make_edge): Remove.
10964
 
10965
2003-05-16  Jeff Law  
10966
 
10967
        * tree-cfg.c (remove_useless_stmts_and_vars): Handle case where
10968
        both arms of an if-then-else simply jump to the same location.
10969
 
10970
        * tree-ssa-ccp.c (get_rhs): Correctly handle MODIFY_EXPR embedded in
10971
        a RETURN_EXPR.
10972
        (set_rhs): Likewise.
10973
 
10974
2003-05-15  John David Anglin  
10975
 
10976
        * Makefile.in (regmove.o-warn): Change to -Wno-error.
10977
 
10978
2003-05-15  Andrew MacLeod  
10979
 
10980
        * tree-cfg.c (enum find_location_action): Enum for find_insert_location.
10981
        (bsi_insert_before): Handle insert at start of a BB and update pointers
10982
        from parents if appropriate.
10983
        (find_insert_location): Handle COND_EXPR properly. Return
10984
        an enum type indicating what action to take on the returned value.
10985
        (bsi_commit_first_edge_insert): Use new returned action.
10986
 
10987
2003-05-15  Jeff Law  
10988
 
10989
        * tree-cfg.c (make_edges): Factor out loop invariants from
10990
        code to insert edges from the TRY to the FINALLY block.
10991
        Avoid creating unnecessary edges from the end of the
10992
        FINALLY block back to the start of the FINALLY block.
10993
 
10994
2003-05-15  Diego Novillo  
10995
 
10996
        * tree-ssa.c (rewrite_out_of_ssa): Undo previous patch.
10997
 
10998
2003-05-15  Diego Novillo  
10999
 
11000
        * tree-ssa.c (rewrite_out_of_ssa): Don't dump the optimized
11001
        function after the SSA->normal pass.
11002
 
11003
2003-05-14  Toon Moene  
11004
 
11005
        * Makefile.in: Add additional -Wno-error targets for Alpha.
11006
 
11007
2003-05-13  Jason Merrill  
11008
 
11009
        * gdbinit.in (pgs, pge): New macros.
11010
 
11011
        Implement expression temporary optimization.
11012
        * gimplify.c (gimplify_ctx): Add temp_htab field.
11013
        (push_gimplify_context): Initialize it.
11014
        (pop_gimplify_context): Destroy it.
11015
        (simplify_expr): If there's no internal postqueue, generate an
11016
        expression temporary.
11017
        (gimple_tree_hash, gimple_tree_eq): New fns.
11018
        (create_tmp_from_val, lookup_tmp_var): New fns.
11019
        (get_formal_tmp_var): New fn.
11020
        (internal_get_tmp_var): New fn.
11021
        (get_initialized_tmp_var): Use it.
11022
        * tree-simple.h: Declare it.
11023
 
11024
        * gimplify.c (simplify_cond_expr): Reorganize.
11025
        (shortcut_cond_expr, shortcut_cond_r): New fns.
11026
        (build_and_jump): New fn.
11027
        (gimplify_exit_expr): Use it.
11028
 
11029
        * gimplify.c (simplify_expr): Do better at stripping unnecessary
11030
        NOPs.  Tidy GOTO_EXPR handling.  Don't allow NON_LVALUE_EXPR.
11031
        * tree-simple.c (is_simple_modify_expr): Don't allow NON_LVALUE_EXPR.
11032
        (is_simple_binary_expr, is_simple_condexpr): Likewise.
11033
        (is_simple_unary_expr, is_simple_compound_lval): Likewise.
11034
        (is_simple_id): Likewise.
11035
 
11036
        * tree-ssa.c (rewrite_stmt): Discard redundant assignments.
11037
        (avail_expr_eq): Don't test ops1 == ops2.
11038
        (avail_expr_hash): Use iterative_hash_object.
11039
 
11040
2003-05-13  Jeff Law  
11041
 
11042
        * tree-cfg.c (cleanup_tree_cfg): Update comments.   Set repeat
11043
        anytime we remove a control structure.
11044
 
11045
        * tree-flow.h (struct var_ann_d): New field occurs_in_abnormal_phi.
11046
        * tree-ssa.c (MAY_COPYPROP_P): Do not allow copy propagations
11047
        if either argument occurs in an abnormal phi.
11048
        * tree-dfa.c (add_phi_arg): Set occurs_in_abrnomal_phi as needed.
11049
        * tree-ssa-copyprop.c (copyprop_stmt): Do not allow copy
11050
        propagations if either argument occurs in an abnormal phi.
11051
        (copyprop_phi): Likewise.
11052
 
11053
2003-05-12  Diego Novillo  
11054
 
11055
        * c-common.h (STATEMENT_CODE_P): Use size_t cast instead
11056
        of int.
11057
        (INIT_STATEMENT_CODES): Change type of local variable i to
11058
        size_t.
11059
 
11060
2003-05-12  Diego Novillo  
11061
 
11062
        * c-pretty-print.c (dump_c_node): Call CONSTRUCTOR_ELTS
11063
        to access the operand of a CONSTRUCTOR node.
11064
        * tree-pretty-print.c (dump_generic_node): Likewise.
11065
 
11066
2003-05-11  Diego Novillo  
11067
 
11068
        * c-simplify.c (simplify_if_stmt): Replace calls to
11069
        warning_with_file_and_line with warning.
11070
 
11071
2003-05-12  Frank Ch. Eigler  
11072
 
11073
        * toplev.c (lang_independent_options): Add "-fmudflapth".
11074
        * flags.h (flag_mudflap): Document meaning of >1 value.
11075
        * gcc.c (MFWRAP_SPEC, MFLIB_SPEC): Add -fmudflapth support.
11076
        (cpp_unique_options, cc1_options): Ditto.
11077
 
11078
2003-05-10  Sebastian Pop  
11079
 
11080
        * gimplify.c (simplify_expr): Replace CONST_DECL with its DECL_INITIAL.
11081
 
11082
2003-05-09  Sebastian Pop  
11083
 
11084
        * tree-optimize.c (optimize_function_tree): Clarify the use of the
11085
        loop analyzer.
11086
 
11087
2003-05-09  Jeff Law  
11088
 
11089
        * c-simplify.c (simplify_cleanup): Remove code which optimizes
11090
        TRY_FINALLY and TRY_CATCH.  It doesn't trigger.
11091
 
11092
        * tree-cfg.c (remove_useless_stmts_and_vars): Optimize away
11093
        TRY_CATCH and TRY_FINALLY blocks when possible.
11094
 
11095
2003-05-09  Diego Novillo  
11096
 
11097
        * tree-pretty-print.c (dump_generic_node): CONSTRUCTOR
11098
        nodes have only one operand now.
11099
 
11100
2003-05-08  Andrew MacLeod  
11101
 
11102
        * tree-cfg.c (pdom_info): New file level static.
11103
        (cleanup_tree_cfg): Free dominance info, if it was used.
11104
        (bsi_replace): New. Replace a stmt with a new one.
11105
        (linearize_cond_expr): Use post dominator info to determine is a
11106
        conditional can be safely removed.
11107
        (find_insert_location): New. Determine where to insert a new stmt that
11108
        is placed on a split edge.
11109
        (bsi_commit_first_edge_insert): Use find_insert_location to determine
11110
        where to link a stmt when splitting an edge.
11111
        (merge_tree_blocks): When deleting a basic block, remove it from the
11112
        dominance structure if it exists.
11113
        * tree-dfa.c (add_stmt_operand): Don't rename local statics. Treat
11114
        them just like globals.
11115
        * tree-flow.h (struct var_ann_d): Add root_var_processed bit and
11116
        root_index fields.
11117
        * tree-ssa-dce.c (process_worklist): Mark conditions feeding PHI's as
11118
        necessary as well.
11119
        (remove_dead_phis): Add missing debug information.
11120
        * tree-ssa-live.c (var_union): Handle combining partitions when one
11121
        has a root_variable as a representative.
11122
        (compact_var_map): Add comments and use flags.
11123
        (init_root_var): Use new root_var fields in struct var_ann_d.
11124
        (dump_root_var): Send output to specified file, not stderr.
11125
        (dump_var_map): Remove dump_flag parameter & some grotesque debug info.
11126
        * tree-ssa-live.h (VAR_ANN_ROOT_INDEX): Define.
11127
        (VARMAP_NORMAL, VARMAP_NO_SINGLE_DEFS): Define flags for compact_var_map.
11128
        (var_to_partition_to_var): Return NULL if not in a partition.
11129
        (find_root_var): Use VAR_ANN_ROOT_INDEX.
11130
        * tree-ssa.c (insert_copy_on_edge): Add listing info.
11131
        (coalesce_ssa_name): Coalesce live-on-entry variables to their root.
11132
        Coalesce partitions across abnormal edges.
11133
        (assign_vars): Remove redundant initialization code. Handle root_vars
11134
        which have already been coalesced to a partition.
11135
        (rewrite_out_of_ssa): Add debug info & remove PHI nodes when processed.
11136
        (rewrite_stmt): Don't redefine redundant expressions.
11137
 
11138
2003-05-08  Jeff Law  
11139
 
11140
        * c-simplify.c (simplify_expr_stmt): Make sure to
11141
        simplify the body of the EXPR_STMT.
11142
 
11143
        * tree-dfa.c (remove_decl): Accept new argument for the block
11144
        to start the search.
11145
        * tree-flow.h (remove_decl): Update prototype.
11146
        * tree-cfg.c (remove_stmt): Pass the toplevel block to
11147
        remove_decl.
11148
 
11149
        * tree-dfa.c (find_hidden_use_vars): No longer returns a value.
11150
        Callers and prototype updated.  No longer need to look for
11151
        nested functions, instead just mark any variables and
11152
        parameters with DECL_NONLOCAL set as having hidden uses.
11153
 
11154
2003-05-08  Diego Novillo  
11155
 
11156
        * version.c (version_string): Change format to show daily
11157
        datestamp and merged date.
11158
 
11159
2003-05-07  Jeff Law  
11160
 
11161
        * tree-cfg.c (remove_useless_stmts_and_vars): Do not remove
11162
        the toplevel BIND_EXPR for an inlined function.
11163
 
11164
        * tree-dfa.c (find_hidden_use_vars): Look at the size of
11165
        VAR_DECLs, not the size of ARRAY_TYPES.  Also make sure
11166
        to reset *inside_vla to its original value when done
11167
        processing any particular VAR_DECL.
11168
 
11169
2003-05-06  Diego Novillo  
11170
 
11171
        * c-simplify.c (simplify_if_stmt): Warn if
11172
        -Wunreachable-code is given and the conditional is always
11173
        true or always false.
11174
 
11175
        * expr.c (expand_expr): Don't try to expand FUNCTION_DECL
11176
        nodes when processing BIND_EXPR_VARS.
11177
 
11178
        * varasm.c (output_constant_def_contents): Re-use the
11179
        label when emitting a label for mudflap.
11180
 
11181
        Disable the following patch:
11182
 
11183
        2003-04-30  Steven Bosscher  
11184
 
11185
                * ggc-page.c (TREE_EXP_SIZE): Define.
11186
                (extra_order_size_table): New entry for expr trees with
11187
                two operands.
11188
 
11189
2003-05-06  Jeff Law  
11190
 
11191
        * tree-cfg.c (make_exit_edges): Fix handling of blocks which
11192
        end with calls.
11193
 
11194
        * tree-cfg.c (remove_useless_stmts_and_vars): Remove GOTO_EXPRs
11195
        to the immediately following tree node.
11196
 
11197
        * tree-cfg.c (make_goto_expr_edges): Fix typo in comment.
11198
        (remove_useless_stmts_and_vars): New function.
11199
        * tree-flow.h (remove_useless_stmts_and_vars): Prototype.
11200
        * tree-ssa.c (rewrite_out_of_ssa): After returning to normal
11201
        form, call remove_useless_stmts_and_vars.
11202
 
11203
2003-05-02  Daniel Berlin  
11204
 
11205
        * tree-alias-common.c (alias_get_name): Given unnamed result decls
11206
        a name.
11207
        (create_fun_alias_var): Use DECL_RESULT if available.
11208
 
11209
2003-05-02  Jeff Law  
11210
 
11211
        * tree-inline.c (expand_call_inline): Avoid creating naked
11212
        _DECL nodes for inlined functions which had NRV optimizations
11213
        applied.
11214
 
11215
2003-05-02  Diego Novillo  
11216
 
11217
        * tree-cfg.c (build_tree_cfg): Update comment.
11218
        (make_blocks): Don't skip over empty statements.
11219
        Move exception handling code ...
11220
        (compute_reachable_eh): ... here.
11221
        (set_parent_stmt): Don't skip over empty statements.
11222
        (bsi_remove): Don't return early on empty statements.
11223
        Don't call STRIP_NOPS.
11224
        (remove_stmt): Don't call STRIP_NOPS.
11225
        Always compute the block holding the statement.
11226
        After replacing the statement with an empty statement, add the
11227
        empty statement to the block.
11228
        (successor_block): Don't call STRIP_NOPS.
11229
        (first_exec_stmt): Likewise.
11230
        (first_exec_block): Don't return early for empty statements.
11231
        (first_stmt): Don't test for NULL blocks.
11232
        Reformat to improve legibility.
11233
        (bsi_next_in_bb): Don't call STRIP_NOPS.
11234
        Reformat to improve legibility.
11235
        (set_bb_for_stmt): Don't ignore empty statements.
11236
 
11237
        * tree-dfa.c (get_stmt_operands): Don't call STRIP_NOPS.
11238
        (create_stmt_ann): Don't abort on emtpy statements.
11239
        Don't call STRIP_NOPS.
11240
        (copy_stmt): Remove unused function.
11241
        * tree-flow.h (copy_stmt): Remove prototype.
11242
 
11243
        * tree-flow-inline.h: Don't call STRIP_NOPS.
11244
        Remove local variable 't'.
11245
        (bsi_stmt): Don't return NULL_TREE for empty statements.
11246
        Ignore error_mark_node.
11247
 
11248
        * tree-iterator.h (tsi_next): Don't call STRIP_NOPS.
11249
        (tsi_stmt_ptr): Likewise.
11250
        (tsi_stmt): Likewise.
11251
        Don't return NULL_TREE for empty statements.
11252
 
11253
        * tree-pretty-print.c (dump_generic_node): Don't ignore empty
11254
        statements.
11255
 
11256
        * tree-ssa-ccp.c (fold_stmt): Don't call STRIP_NOPS.
11257
        * tree-ssa-dce.c (find_useful_stmts): Likewise.
11258
        (remove_dead_stmt): Likewise.
11259
        * tree-ssa.c (mark_def_sites): Likewise.
11260
        (rewrite_out_of_ssa): Likewise.
11261
        (rewrite_stmt): Likewise.
11262
 
11263
        * tree.c (make_ssa_name): Don't ignore empty statements.
11264
        (body_is_empty): Fix comment.
11265
 
11266
2003-05-01  Jeff Law  
11267
 
11268
        * tree-dfa.c (find_hidden_use_vars): Renamed from find_vla_decls.
11269
        Now returns a value indicating if nested function was found.
11270
        When nested functions are found, mark suitable variables as
11271
        having hidden uses.
11272
        (find_hidden_use_vars_r): Renamed from find_vla_decls_r.
11273
        (compute_may_alias): Corresponding changes.  Handle
11274
        multiple BLOCKs at the toplevel of a function.
11275
 
11276
2003-04-30  Diego Novillo  
11277
 
11278
        * tree.c (build_empty_stmt): New function.
11279
        * tree.h (IS_EMPTY_STMT): Define.
11280
        (TI_EMPTY_STMT): Remove.
11281
        (empty_stmt_node): Remove.
11282
        Replace 'X = empty_stmt_node' with 'X = build_empty_stmt ()',
11283
        and 'X == empty_stmt_node' with 'IS_EMPTY_STMT (X)' everywhere.
11284
        (build_empty_stmt): Declare.
11285
 
11286
        * cp/cp-simplify.c (cp_simplify_stmt): Use IS_EMPTY_STMT.
11287
 
11288
        * java/java-tree.h (build_java_empty_stmt): Declare.
11289
        * java/expr.c (build_java_empty_stmt): New function.
11290
        * java/decl.c (java_init_decl_processing): Don't build empty_stmt_node.
11291
        Replace 'X = empty_stmt_node' with 'X = build_java_empty_stmt ()',
11292
        and 'X == empty_stmt_node' with 'IS_EMPTY_STMT (X)' everwhere.
11293
 
11294
2003-04-30  Jeff Law  
11295
 
11296
        * tree-dfa.c (get_expr_operands): Do not ignore operands of an
11297
        an ADDR_EXPR if it is a PARM_DECL or VAR_DECL.
11298
 
11299
        * tree-dfa.c (get_expr_operands): Look inside operands in
11300
        a TREE_LIST.
11301
 
11302
2003-04-29  Diego Novillo  
11303
 
11304
        * builtins.def (BUILTIN_CONSTANT_P): Mark as constant.
11305
 
11306
        * tree-dfa.c (get_expr_operands): Do not add VDEF operands for
11307
        dereferenced pointers at call sites.
11308
        * tree-ssa.c (assign_vars): Abort if we couldn't coalesce all the
11309
        versions together.
11310
 
11311
2003-04-29  Andrew MacLeod  
11312
 
11313
        * tree-cfg.c (bsi_start): If there are no stmts in a block, use the
11314
        context pointer to represent the basic block.
11315
        (bsi_insert_after): Handle inserting into empty blocks better.
11316
        (bsi_insert_before): Call bsi_insert_after to handle empty blocks.
11317
        * tree-ssa.c (elim_create): Clear bitmap after its been processed
11318
        instead of during loop.
11319
 
11320
2003-04-27  Diego Novillo  
11321
 
11322
        * Makefile.in (tree-mudflap.o): Add dependency on $(TREE_DUMP_H).
11323
        * c-decl.c (c_expand_body_1): Don't call simplify_function_tree
11324
        after mudflap_c_function.
11325
        Move mudflap instrumentation after SSA optimizers.
11326
        * tree-dump.c (dump_files): Add entry for -fdump-tree-mudflap.
11327
        * tree.h (enum tree_dump_index): Add TDI_mudflap.
11328
        * doc/invoke.texi: Document -fdump-tree-mudflap.
11329
        * tree-mudflap.c: Include tree-dump.h.
11330
        (dump_file): New local variable.
11331
        (dump_flags): New local variable.
11332
        (mudflap_c_function): Call dump_begin, dump_end and dump_function.
11333
        (mf_decl_cache_locals): Set DECL_CONTEXT for __mf_lookup_shift_l
11334
        and __mf_lookup_mask_l to current_function_decl.
11335
        (mf_offset_expr_of_array_ref): Likewise for __mf_index_X.
11336
        (mf_build_check_statement_for): Re-implement to emit a proper
11337
        STMT_EXPR.
11338
        (mx_xfn_indirect_ref): Emit detailed debugging info if
11339
        -fdump-tree-mudflap-details is given.
11340
        (mudflap_enqueue_decl): Likewise
11341
        * tree-optimize.c (optimize_function_tree): Don't check for
11342
        -fmudflap.
11343
 
11344
2003-04-26  Diego Novillo  
11345
 
11346
        * c-simplify.c (build_bc_goto): If the target label couldn't be
11347
        found, emit an error message.
11348
 
11349
2003-04-25  Andrew MacLeod  
11350
 
11351
        * tree-ssa-live.c (compact_var_map): Add parameter to exclude variables
11352
        with a single SSA version.
11353
        (init_root_var): Allow that a var_map might not be compacted yet.
11354
        * tree-ssa-live.h (compact_var_map): Change Prototype.
11355
        * tree-ssa.c (rewrite_out_of_ssa): When coalescing, don't include single
11356
        reference variables during the compaction.
11357
 
11358
2003-04-25  Jeff Law  
11359
 
11360
        * tree-optimize.c (optimize_function_tree): Simplify slightly.
11361
 
11362
2003-04-25  Andrew MacLeod  
11363
 
11364
        * tree-ssa.c (struct _elim_graph): Change type of fields
11365
        'pred' and 'succ' to be bitmaps instead of sbitmaps.
11366
        Update all uses.
11367
 
11368
2003-04-25  Diego Novillo  
11369
 
11370
        * tree-cfg.c (linearize_cond_expr): Reformat.
11371
        * tree-dfa.c (get_expr_operands): Check for read-only
11372
        status the dereferenced argument pointer, not the pointer
11373
        itself.
11374
        (add_stmt_operand): Always consider global variables as
11375
        virtual operands.
11376
 
11377
2003-04-24  Jason Merrill  
11378
 
11379
        * gimplify.c (simplify_cond_expr): Avoid redundant gimplification.
11380
 
11381
        Add TREE_VEC of case labels to the SWITCH_EXPR during gimplification.
11382
        * tree.def (CASE_LABEL_EXPR): Add an operand for the LABEL_DECL.
11383
        * tree.h (SWITCH_LABELS, CASE_LABEL): New macros.
11384
        * c-simplify.c (c_simplify_stmt) : Create LABEL_DECL here.
11385
        * expr.c (expand_expr) : Not here.
11386
        * gimplify.c (gimplify_ctx): Add case_labels field.
11387
        (gimplify_switch_expr, gimple_add_case_label): New fns.
11388
        (simplify_expr): Use them.
11389
 
11390
2003-04-24  Andrew MacLeod  
11391
 
11392
        * tree-flow.h (processed_out_of_ssa): Rename to out_of_ssa_tag.
11393
        * tree-ssa-live.c (register_ssa_partition): Add variable to partition.
11394
        (change_partition_var): Use out_of_ssa_tag.
11395
        (create_ssa_var_map): Add all uses, defs and PHI elements to partition.
11396
        (new_tree_live_info): Create a live range info structure.
11397
        (delete_tree_live_info): Free storage.
11398
        (live_worklist): Fill in the live range info for a variable for the
11399
        blocks between the def and all the blocks containing uses.
11400
        (set_if_valid): Set partition bit if variable is in a partition.
11401
        (add_livein_if_notdef): Set live on entry bit for a var's partition
11402
        if a definition has not been seen.
11403
        (calculate_live_on_entry): Create partition live on entry bitmaps for
11404
        all basic blocks .
11405
        (calculate_live_on_exit): Calculate live on exit information for each
11406
        basic block.
11407
        (init_root_var): Initialize and fill in a root_var structure.
11408
        (remove_root_var_partition): remove a partition from a root_var list.
11409
        (delete_root_var): Free storage.
11410
        (dump_root_var): Display root_var summary.
11411
        (dump_var_map): Show extra info for ssa name versions.
11412
        * tree-ssa-live.h (NO_PARTITION): Define.
11413
        (register_ssa_partition): Remove.
11414
        (partition_to_var): Use partition_find after decompressing.
11415
        (var_to_partition): Return NO_PARTITION if var is not in a partition.
11416
        (struct tree_live_info_d): Define live range info structure.
11417
        (partition_is_global): Return 1 if used outside a basic block.
11418
        (live_entry_blocks): Return bitmap over blocks that partition is live
11419
        on entry to.
11420
        (live_on_exit): Return bitmap of partitions live on exit from a block.
11421
        (struct root_var_d): Define a root_var structure.
11422
        (ROOT_VAR_NONE): Define.
11423
        (num_root_vars): Number of variables in root_var object.
11424
        (root_var): Return variable for a root_var index.
11425
        (first_root_var_partition): Return first partition for a root_var.
11426
        (next_root_var_partition): Get next partition for a root_var.
11427
        (find_root_var): Find root_var index for a specific partition.
11428
        * tree-ssa.c (eliminate_extraneous_phis): Remove.
11429
        (set_if_valid): Set partition bit if variable is in a partition.
11430
        (add_conflicts_if_valid): Add conflict between variable and all
11431
        related partitions set in a bitvector.
11432
        (coalesce_ssa_name): Create a conflict graph and coalesce all
11433
        partitions which don't conflict and are related by the same root_var.
11434
        (assign_vars): Use a root_var object, and assign different real
11435
        variables to all partitions.
11436
        (rewrite_out_of_ssa): Call compact_var_map() once, and don't call
11437
        eliminate_extraneous_phis.
11438
 
11439
2003-04-23  Daniel Berlin  
11440
 
11441
        * tree-flow.h (create_global_var): Add prototype.
11442
 
11443
        * tree-dfa.c (create_global_var): Externalize.
11444
 
11445
        * tree-alias-common.c: Set DECL_CONTEXT on our temp alias vars.
11446
        (call_may_clobber): Make a copy of this function, since our version
11447
        will be slightly different soon.
11448
        (create_alias_vars): We need global_var, so create it if necessary.
11449
 
11450
2003-04-23  Daniel Berlin  
11451
 
11452
        * tree-ssa-pre.c (do_proper_save): Remove old code, since the new
11453
        insertion code works okay.
11454
        (pre_expression): Use new_rename_1, it removes a *lot* of useless
11455
        saves.
11456
 
11457
2003-04-23  Jeff Law  
11458
 
11459
        * gimplify.c (simplify_target_expr): Make sure to simplify
11460
        the cleanup too.
11461
 
11462
        * tree-ssa.c (struct def_blocks_d): Add new field phi_insertion_points.
11463
        (compute_global_livein): Accept varray rather than bitmaps.  Callers
11464
        updated.  Rewrite to compute global life information for all the
11465
        objects in the varray in parallel.
11466
        (insert_phis_for_deferred_variables): New function.
11467
        (insert_phi_nodes_for): New argument DEF_MAPs.  When an object
11468
        crosses the threshold for using fully pruned PHI insertions,
11469
        push it on the def_maps varray for deferred processing.
11470
        (insert_phi_nodes): Initialize def_maps.  Pass it to
11471
        insert_phi_nodes_for.  Drain the def_maps varray as it grows.
11472
        Also drain any residual objects in def_maps.  Zero def_maps
11473
        when complete.
11474
 
11475
2003-04-21  Jeff Law  
11476
 
11477
        * tree-cfg.c (find_contained_blocks_and_edge_targets): New function.
11478
        (try_finallys): New varray used during edge creation.
11479
        (make_edges): Initialize try_finallys varray.  After creating
11480
        all the "normal" edges, go back and create the special edges
11481
        for the try-finally blocks.
11482
        (make_ctrl_stmt_edges): Create edges for the EH nodes.  Also
11483
        make sure to build the try-finally stack.
11484
        (make_exit_edges): Create edges from calls which may throw
11485
        to any directly reachable exception handlers.
11486
        (is_ctrl_altering_stmt): Statements which may throw alter
11487
        flow control.
11488
 
11489
        * tree-cfg.c: Include except.h.
11490
        (eh_stack): New file-scoped varray.
11491
        (build_tree_cfg): Initialize eh_stack.
11492
        (make_catch_expr_blocks): New function.
11493
        (make_try_expr_blocks, make_eh_filter_expr_blocks): Likewise.
11494
        (make_blocks): Call new functions as needed.  When ending a block
11495
        due to a statement that may throw, compute the reachable exception
11496
        handlers and store it in the statement's annotation.
11497
        (is_ctrl_stmt): Handle EH nodes.
11498
        (stmt_ends_bb_p): Likewise.
11499
        * tree-flow.h (stmt_ann_d): Add new field reachable_exception_handlers.
11500
 
11501
        * except.c (check_handled): No longer static.
11502
        * except.h (check_handled): Prototype.
11503
 
11504
        * c-simplify.c (c_build_bind_expr): Revert change from earlier today.
11505
 
11506
        * c-common.h (find_reachable_label): Prototype.
11507
        * c-semantics.c (find_reachable_label): No longer static.
11508
        * c-simplify.c (c_build_bind_expr): Avoid creating unnecessary
11509
        BIND_EXPRs.
11510
        (simplify_cleanup): Avoid creating unnecessary TRY_CATCH_EXPRs
11511
        or TRY_FINALLY_EXPRs.
11512
        (simplify_if_stmt): If the condition is constant and the
11513
        unexecuted arm has no reachable code, then just emit
11514
        the executed arm.
11515
 
11516
2003-04-18  Sebastian Pop  
11517
 
11518
        * cfghooks.h, cfghooks.c: New files.
11519
        * Makefile.in (BASIC_BLOCK_H): Depends on cfghooks.h.
11520
        (OBJS): Add cfghooks.o.
11521
        (tree-optimize.o): Depends on cfgloop.h.
11522
        (cfghooks.o): New rule.
11523
        * basic-block.h (split_edge): Rename to rtl_split_edge.
11524
        (tree_split_edge): Declare.
11525
        (create_bb): Declare extern here.
11526
        (verify_flow_info): Rename to rtl_verify_flow_info.
11527
        (tree_verify_flow_info): Declare.
11528
        (cfghooks.h): Included here.
11529
        * cfgloop.c (tree.h, tree-flow.h): Included.
11530
        (make_forwarder_block): Renamed to rtl_make_forwarder_block.
11531
        (tree_make_forwarder_block): New static function.
11532
        (blocks_headers): Declared static.
11533
        (HEADER_BLOCK): Use blocks_headers instead of bb's .aux field.
11534
        (redirect_edge_with_latch_update, make_forwarder_block,
11535
        canonicalize_loop_headers): Don't allocate .aux, but makes grow
11536
        the blocks_headers array.
11537
        (canonicalize_loop_headers): Register tree_make_forwarder_block
11538
        into the tree_cfg_hooks and rtl_make_forwarder_block into the
11539
        rtl_cfg_hooks structure.
11540
        (canonicalize_loop_headers): Initialize/free the blocks_headers
11541
        array rather than the bb's .aux field.
11542
        * cfgloopmanip.c (loop_split_edge_with_NULL): New static function.
11543
        (remove_path, force_single_succ_latches):
11544
        Call loop_split_edge_with_NULL instead of loop_split_edge_with.
11545
        * cfgrtl.c (split_block): Update the comment.
11546
        (split_edge): Renamed rtl_split_edge.
11547
        (verify_flow_info): Renamed rtl_verify_flow_info.
11548
        * loop-init.c (loop_optimizer_init, loop_optimizer_finalize):
11549
        Execute code following the value of cfg_level.
11550
        * toplev.c (rest_of_compilation): Call rtl_register_cfg_hooks.
11551
        * tree-cfg.c (create_bb): Declared extern.
11552
        (build_tree_cfg): Call tree_register_cfg_hooks.
11553
        (make_edges, make_exit_edges): Remove the use of EDGE_FALLTHRU.
11554
        (bsi_commit_first_edge_insert): Use split_edge.
11555
        (tree_split_edge, tree_verify_flow_info): New functions.
11556
        * tree-optimize.c (cfgloop.h): Included.
11557
        (optimize_function_tree): Add #if 0'ed calls to
11558
        loop_optimizer_init and loop_optimizer_finalize.
11559
 
11560
2003-04-16  Jeff Law  
11561
 
11562
        * Makefile.in (tree-ssa.o): Depend on langhooks.h.
11563
        (tree-dfa.o, tree-cfg.o): Likewise.
11564
        * tree-cfg.c: Include langhooks.h
11565
        (dump_tree_cfg): Revamp how we get the current function's name
11566
        to not rely on current_function_name (and implicitly cfun).
11567
        (dump_cfg_stats, tree_cfg2dot): Likewise.
11568
        * tree-dfa.c: Include langhooks.h
11569
        (dump_immediate_uses): Revamp how we get the current function's name
11570
        to not rely on current_function_name (and implicitly cfun).
11571
        (dump_dfa_stats, dump_alias_info): Likewise.
11572
        * tree-ssa.c: Include langhooks.h
11573
        (dump_tree_ssa): Revamp how we get the current function's name
11574
        to not rely on current_function_name (and implicitly cfun).
11575
 
11576
        * tree-cfg.c (make_loop_expr_blocks): When determining the value for
11577
        NEXT_BLOCK_LINK, correctly handle empty statement nodes at the
11578
        end of the tree.
11579
        (make_cond_expr_blocks, make_switch_expr_blocks): Likewise.
11580
        (make_bind_expr_blocks): Likewise.
11581
 
11582
        * gimplify.c (keep_function_tree_in_gimple_form): Move check of
11583
        flag_disable_simple here.  Include flags.h.
11584
        * Makefile.in (gimplify.o): Depends on flags.h
11585
        * c-decl.c (c_expand_body_1): No longer check flag_disable_simple.
11586
        * tree-inline.c (copy_body_r): Avoid creating non-gimple code
11587
        when inlining a function where the RESULT_DECL's initialization
11588
        is not on the RETURN_EXPR.
11589
 
11590
2003-04-15  Jeff Law  
11591
 
11592
        * tree-flow.h (struct var_ann_d): Renamed is_vla_decl field to
11593
        has_hidden_use.
11594
        (has_hidden_use, set_has_hidden_use): Renamed from is_vla_decl
11595
        and set_vla_decl.
11596
        * tree-flow-inline.h (has_hidden_use): Renamed from is_vla_decl.
11597
        Updated to use "has_hidden_use" instead of "is_vla_decl" field.
11598
        (set_has_hidden_use): Renamed from set_vla_decl.
11599
        Updated to use "has_hidden_use" instead of "is_vla_decl" field.
11600
        * tree-dfa.c (dump_variable): Corresponding changes.
11601
        (find_vla_decls_r): Likewise.
11602
        * c-simplify.c (simplify_decl_stmt): Likewise.
11603
        * tree-ssa-dce.c: Likewise.
11604
 
11605
2003-04-09  Jeff Law  
11606
 
11607
        * tree-dfa.c (struct alias_set_d, field tag_sym_set): Remove
11608
        unused field.
11609
        (register_alias_set): Rework to avoid incorrect coalescing of
11610
        entries.  Fix memory leak.  No longer set field tag_sym_set.
11611
        (get_expr_operands): ADDR_EXPR expressions may have interesting
11612
        operands in some cases.
11613
 
11614
2003-04-09  Diego Novillo  
11615
 
11616
        * gimplify.c (simplify_expr): Handle VECTOR_CST nodes.
11617
        * tree-cfg.c (make_blocks): Ignore empty statement containers.
11618
        Create a basic block before processing containers that only have
11619
        empty statements.
11620
        (make_loop_expr_blocks): Use the container instead of the statement
11621
        when setting NEXT_BLOCK_LINK.
11622
        (make_cond_expr_blocks): Likewise.
11623
        (make_switch_expr_blocks): Likewise.
11624
        (make_bind_expr_blocks): Likewise.
11625
        (successor_block): If the last statement of the block is the empty
11626
        statement, use its container to get NEXT_BLOCK_LINK.
11627
        (stmt_starts_bb_p): Return false if the statement is NULL.
11628
        * tree-pretty-print.c (dump_generic_node): Handle VECTOR_CST nodes.
11629
        * tree-simple.c (is_simple_const): Accept VECTOR_CST as constants.
11630
        * objc/objc-lang.c (LANG_HOOKS_TREE_INLINING_TREE_CHAIN_MATTERS_P):
11631
        Define.
11632
 
11633
2003-04-06  Diego Novillo  
11634
 
11635
        * tree-cfg.c (remove_bb): Call ssa_remove_edge.
11636
        (cleanup_cond_expr_graph): Likewise.
11637
        (cleanup_switch_expr_graph): Likewise.
11638
        (disconnect_unreachable_case_labels): Likewise.
11639
        (merge_tree_blocks): Likewise.
11640
        Update PHI nodes at BB2's successor.
11641
        (dump_tree_bb): Show PHI nodes in the block.
11642
        * tree-dfa.c (add_phi_arg): Update comment.
11643
        (remove_phi_arg_num): New function.
11644
        (remove_phi_arg): Call it.
11645
        Move from tree-ssa.c.
11646
        (remove_phi_node): Move from tree-ssa.c.
11647
        * tree-flow.h (ssa_make_edge): Declare.
11648
        (ssa_remove_edge): Declare.
11649
        * tree-pretty-print.c (dump_generic_node): Show block where PHI
11650
        arguments are coming from.
11651
        * tree-ssa-dce.c (pdom_info): New local variable.
11652
        (remove_dead_stmts): Initialize it and free it at the end.
11653
        (remove_conditional): New function.
11654
        (remove_dead_stmt): Call it.
11655
        * tree-ssa.c (eliminate_phi): If the edge index is -1, abort
11656
        compilation.
11657
        (ssa_remove_edge): New function.
11658
        (ssa_make_edge): New function.
11659
 
11660
2003-04-06  Andrew MacLeod  
11661
 
11662
        * tree-cfg.c (push_bsi): New. Push a block_stmt_iterator onto a stack.
11663
        (pop_bsi): New. Pop a block_stmt_iterator off a stack.
11664
        * tree-flow-inline.h (struct bsi_list_d): Block iterator stack struct.
11665
        (new_bsi_list): Start a new bsi stack.
11666
        (empty_bsi_stack): Is stack empty.
11667
        (FOR_EACH_BSI_IN_REVERSE): Macro for processing bsi's in reverse.
11668
        (FOR_EACH_STMT_IN_REVERSE): Macro for processing stmt's in reverse.
11669
 
11670
2003-04-06  Andreas Jaeger  
11671
 
11672
        * treelang/treetree.c (tree_code_create_function_initial): Replace
11673
        calls to non-existent function annotate_with_file_line_column with
11674
        calls to annotate_with_file_line.
11675
        (tree_code_create_variable): Likewise.
11676
 
11677
2003-04-05  Diego Novillo  
11678
 
11679
        * tree-dfa.c (get_expr_operands): Do not clobber readonly operands
11680
        in CALL_EXPRs.
11681
        (find_vars_r): Likewise.
11682
        (add_indirect_ref_var): When creating new INDIRECT_REF variables,
11683
        copy the readonly attribute from the variable's type.
11684
 
11685
2003-04-05  Diego Novillo  
11686
 
11687
        * tree.c (copy_node): Never copy tree annotations.
11688
 
11689
2003-04-05  Diego Novillo  
11690
 
11691
        * tree-ssa-ccp.c (visit_cond_stmt): Don't short circuit evaluation
11692
        of UNDEFINED conditional expressions.
11693
 
11694
2003-04-04  Andrew MacLeod  
11695
 
11696
        * Makefile.in : Add tree-ssa-live.c and tree-ssa-live.h files.
11697
        * tree-ssa.c (struct _var_map, create_var_map, delete_var_map,
11698
        var_from_partition, get_var_partition, mapped_var_from_ref,
11699
        compact_var_map, dump_tree_partition, set_partition_for_var,
11700
        set_var_mapping, create_var_partition): Remove.
11701
        (create_temp): Allow temps to be created from SSA_NAME vars as well.
11702
        (eliminate_name, eliminate_build, elim_backward, elim_create,
11703
        eliminate_phi): Use new var map interface.
11704
        (coalesce_ssa_name): New. Coalesce ssa_name ranges together.
11705
        (assign_vars): Assign real variables to ssa_name partitions.
11706
        (rewrite_out_of_ssa): Use new varmap partition and routines.
11707
        * tree-ssa-live.h: New file
11708
        (var_map): Structure for variable map.
11709
        (num_var_partitions): Number of partitions.
11710
        (partition_to_var): Return variable for partition.
11711
        (var_to_partition): Return partition variable is in.
11712
        (var_to_partition_to_var): Return variable representing partition
11713
        another variable is in.
11714
        (register_ssa_partition): Initialize a partition element as used.
11715
        * tree-ssa-live.c: New file.
11716
        (init_var_map): Initialize a var_map.
11717
        (delete_var_map): Free storage for a var_map.
11718
        (var_union): Combine 2 partitions.
11719
        (compact_var_map): Reduce the number of partitions in a var_map.
11720
        (change_partition_var): Assign a specific var to a partition.
11721
        (create_ssa_var_map): Initialize a var_map with referenced variables.
11722
        (dump_var_map): Debug output for a var_map.
11723
 
11724
2003-04-03  Diego Novillo  
11725
 
11726
        * fold-const.c (fold_relational_hi_lo): Add missing comparison when
11727
        folding comparisons to signed_max+1.
11728
 
11729
2003-04-02  Jason Merrill  
11730
            Diego Novillo  
11731
 
11732
        * tree-inline.c (initialize_inlined_parameters): Cast argument
11733
        types appropriately when emitting initialization assignments.
11734
 
11735
2003-04-01  Andrew MacLeod  
11736
 
11737
        * tree-cfg.c (PENDING_STMT, SET_PENDING_STMT): New Macros.
11738
        (bsi_insert_on_edge): Rename to bsi_commit_first_edge_insert. Add an
11739
        empty annotation record to the new basic_block.
11740
        (bsi_commit_edge_inserts): New. Commit all pending edge inserts.
11741
        (bsi_insert_on_edge): New. Add stmt to edge's pending insert list.
11742
        * tree-flow-inline.h (phi_arg_from_edge): Return PHI index for an edge.
11743
        (phi_element_for_edge): Return PHI element for an edge.
11744
        * tree-flow.h (struct var_ann_d): Add auxiallary field and new
11745
        bit 'processed_out_of_ssa'.
11746
        * tree-ssa.c (_var_map): Structure for variable parition map.
11747
        (struct _elim_graph): Elimination graph for out-of-ssa pass.
11748
        (create_var_map): Create a new var_map.
11749
        (delete_var_map): Delete a var_map.
11750
        (var_from_parition): Return var for a specified partition.
11751
        (get_var_partition): Return partition a var belongs to.
11752
        (mapped_var_from_ref): Get root var for a var's partition.
11753
        (compact_var_map): Re-map the partitions to make the list dense.
11754
        (dump_var_parition): Print var_map.
11755
        (set_partition_for_var): Associate a real var with a partition.
11756
        (set_var_mapping): Associate an SSA version var with a real var.
11757
        (create_var_partition): Create a partition for processing.
11758
        (create_temp): Create a new temp variable for a partition.
11759
        (insert_copy_on_edge): Insert a copy between variables on an edge.
11760
        (new_elim_graph): Create a new elimination graph.
11761
        (clear_elim_graph): clear an elimination graph.
11762
        (delete_elim_graph): Delete an elimination graph.
11763
        (eliminate_name, eliminate_build, elim_forward,
11764
        elim_unvisited_predecessor, elim_backward, elim_create,
11765
        eliminate_phi): Routines to implement Morgans PHI elimination algorithm.
11766
        (eliminate_extraneous_phis): Eliminate PHI nodes which will never
11767
        generate code.
11768
        (rewrite_out_of_ssa): Use partitions and PHI elimination algorithm.
11769
 
11770
2003-04-01  Jeff Law  
11771
 
11772
        * tree-cfg.c (make_blocks): Make sure the BIND_EXPR's subgraph
11773
        actually ended in a statement before seeing of the statement should
11774
        end a basic block.
11775
 
11776
        * tree-cfg.c (dump_tree_cfg): Avoid crashing when cfun is NULL.
11777
        (tree_cfg2dot): Likewise.
11778
        * tree-dfa.c (dump_immediate_uses): Likewise.
11779
        * tree-pretty-print.c (dump_generic_node): Dump the EH_FILTER_FAILURE
11780
        nodes attached to an EH_FILTER_EXPR.
11781
 
11782
        * tree-dfa.c (get_stmt_operands): Add cases for TRY_FINALLY_EXPR,
11783
        TRY_CATCH_EXPR, CATCH_EXPR and EH_FILTER_EXPR.
11784
        (get_expr_operands): Add case for EXC_PTR_EXPR.
11785
 
11786
        * tree-dfa.c (compute_may_aliases): Accept FNDECL as an argument.
11787
        Use FNDECL instead of relying on CURRENT_FUNCTION_DECL.
11788
        * tree-flow.h (compute_may_aliases): Update prototype.
11789
        * tree-ssa.c (rewrite_into_ssa): Corresponding changes.
11790
 
11791
        * tree-inline.c (expand_calls_inline): Correctly handle EH_FILTER_EXPR.
11792
 
11793
2003-03-31  Diego Novillo  
11794
 
11795
        * Makefile.in (STRICT_WARN, STRICT2_WARN): Remove -Wtraditional.
11796
        * timevar.def (TV_TREE_CLEANUP_CFG): Define.
11797
        * tree-cfg.c (set_parent_stmt): Add documentation.
11798
        (replace_stmt): New function.
11799
        (merge_tree_blocks): New function.
11800
        (remap_stmts): New function.
11801
        (linearize_cond_expr): New function.
11802
        (linearize_control_structures): New function.
11803
        (cleanup_tree_cfg): Call it.
11804
        Use new timevar TV_TREE_CLEANUP_CFG.
11805
        (remove_bb): Update debugging message.
11806
        Make sure that bb->head_tree_p and bb->end_tree_p exist before
11807
        resetting their basic blocks.
11808
        (remove_stmt): When removing a control flow expression, update
11809
        basic block flags.
11810
        (cleanup_control_flow): Make sure that the block contains
11811
        statements.
11812
        (last_stmt): Reformat for readability.
11813
        (last_stmt_ptr): Return NULL if the block has no statements.
11814
        * tree-flow-inline.h (parent_block): Check that the block is not
11815
        empty.
11816
        * tree-flow.h (bb_empty_p): Remove.
11817
        * tree-inline.c (copy_tree_r): Do not copy empty_stmt_node.
11818
        * tree-ssa-dce.c (tree_ssa_dce): Call cleanup_tree_cfg.
11819
        * tree.c (body_is_empty): New function.
11820
        * tree.h (body_is_empty): Declare.
11821
 
11822
2003-03-31  Jeff Law  
11823
 
11824
        * tree-ssa-ccp.c (simulate_block): Add abnormal edges out of a
11825
        block to the edge worklist after simulating a block for the
11826
        first time.  If the block has a single outgoing normal edge,
11827
        add that edge to the worklist after simulating the block for
11828
        the first time.
11829
 
11830
2003-03-31  Frank Ch. Eigler  
11831
 
11832
        * gcc.c (MFLIB_SPEC): Remove -ld.
11833
        (MFWRAP_SPEC): Remove dlopen wrapping.
11834
 
11835
2003-03-28  Diego Novillo  
11836
 
11837
        * tree-ssa.c (rewrite_block): Add new argument 'eq_expr_value'.
11838
        Update all users.
11839
        If 'eq_expr_value' is given, use it to register a new
11840
        value for the variable given on the LHS.
11841
        If the block ends in a conditional expression of the form 'X == Y',
11842
        propagate 'X = Y' into the THEN_CLAUSE.
11843
        (MAY_COPYPROP_P): Define.
11844
        (rewrite_stmt): Call it.
11845
        (register_new_def): Fix comment.
11846
        (get_eq_expr_value): New function.
11847
 
11848
2003-03-28  Diego Novillo  
11849
 
11850
        * basic-block.h (BB_COMPOUND_ENTRY): Remove.  Update all users
11851
        everywhere.
11852
        * tree-cfg.c: Minor fixes to various comments.
11853
        * tree-optimize.c (optimize_function_tree): Dump optimized function
11854
        after SSA->normal conversion.
11855
 
11856
2003-03-26  Daniel Berlin  
11857
 
11858
        * tree-ssa-pre.c:  Implement open64 renaming algorithm.
11859
        (subst_phis): New function.
11860
        (generate_expr_as_of_bb): Ditto.
11861
        (new_rename_1): Ditto.
11862
        (process_delayed_rename): Ditto.
11863
        (do_proper_save): Use bsi_* functions for insertion, don't remove
11864
        old code quite yet, haven't fully tested.
11865
        Also add argument that says whether to insert before use or after use.
11866
        (defs_y_dom_x): Factor through injuries properly.
11867
        (defs_match_p): Ditto.
11868
        (phi_opnd_from_res): Attempt to fix, and remove useless argument.
11869
        (reset_can_be_avail): Fix broken condition that would cause infinite
11870
        loop.
11871
        (update_old_new): #if 0 updating of bb heads.
11872
        (finalize_1): We occasionally get 5 + a rather than a + 5, so we
11873
        need to make sure 5 is a DECL before trying to get a reaching def.
11874
        (repair_use_injury): If we couldn't find a reaching def, we don't need
11875
        to repair it.
11876
        (assign_new_class): Only push to stack2 if it exists (so we can
11877
        share this function in both rename implementations).
11878
        (create_ephi_node): Add argument that says whether to add ephi
11879
        to block or not (we create them sometimes for validation only).
11880
        (tree_perform_ssapre): Skip expressions without any uses.
11881
 
11882
        * tree.h: Add EREF_DELAYED_RENAME.
11883
        (struct tree_eref_common): Add delayed_rename bit.
11884
 
11885
2003-03-25  Diego Novillo  
11886
 
11887
        * tree-simple.c: Use tree codes to document grammar for relational
11888
        operators &&, || and ^.
11889
 
11890
2003-03-25  Diego Novillo  
11891
 
11892
        * cfg.c (dump_edge_info): Add labels for EDGE_TRUE_VALUE,
11893
        EDGE_FALSE_VALUE and EDGE_EXECUTABLE.
11894
        * tree-cfg.c (dump_tree_bb): Change formatting.  Show all
11895
        statements in the block.
11896
        * tree-simple.c: Update documentation for GIMPLE conditional
11897
        expressions.
11898
 
11899
2003-03-24  Diego Novillo  
11900
 
11901
        * tree-dfa.c (get_expr_operands): If there are no call clobbered
11902
        variables, don't create a VDEF for GLOBAL_VAR at clobbering
11903
        CALL_EXPRS.
11904
        * tree-flow.h (fold_stmt): Declare.
11905
        * tree-ssa-ccp.c (fold_stmt): Change to extern declaration.
11906
        * tree-ssa.c (rewrite_stmt): Call it.
11907
 
11908
2003-03-22  Diego Novillo  
11909
 
11910
        * Makefile.in (gtype-desc.o): Add dependency on $(TREE_FLOW_H).
11911
 
11912
        * tree-dfa.c (struct alias_set_d): Add field 'num_elements'.
11913
        (struct walk_state): Move declaration earlier in the file.
11914
        (create_global_var): New local function.
11915
        (num_referenced_vars, num_aliased_objects): Change type to
11916
        'size_t'.  Update all users.
11917
        (aliased_objects, aliased_objects_base, aliased_objects_aliase_set):
11918
        Mark for garbage collection.
11919
        (num_call_clobbered_vars, call_clobbered_vars): New global
11920
        variable.
11921
        (get_expr_operands): For CALL_EXPRs, add a VUSE or VDEF reference
11922
        for every pointer argument.  If the call may clobber, add a VDEF,
11923
        otherwise add a VUSE.
11924
        If the call may clobber, add VDEF for GLOBAL_VAR.
11925
        (dump_variable): Show whether the variable is call clobbered.
11926
        (dump_dfa_stats): Show call clobbered variables.
11927
        (compute_may_aliases): Minor formatting changes.
11928
        (compute_alias_sets): If the function makes clobbering calls, add
11929
        GLOBAL_VAR as an alias to every call-clobbered variable.
11930
        Remove alias sets that have exactly one element.
11931
        (register_alias_set): Set 'num_elements' to zero for every newly
11932
        created alias set.
11933
        (find_alias_for): Don't make a second call to add_may_alias to make
11934
        alias tags alias themselves.  It's redundant.
11935
        Increment 'num_elements' when adding a new alias to an alias set.
11936
        (may_alias_p): Don't handle GLOBAL_VAR.
11937
        Check for structure aliasing when either PTR or VAR are a
11938
        structure.  Don't do it only when both are structures.
11939
        (dump_alias_info): Show all aliases of each variable.
11940
        (find_vars_r): When processing a CALL_EXPR node, set
11941
        walk_state->is_store if the function may clobber and create a
11942
        reference to GLOBAL_VAR.
11943
        (add_indirect_ref_var): Change type of second argument from 'void *'
11944
        to 'struct walk_state *'.  Update all users.
11945
        (add_referenced_var): Likewise.  If a potentially aliased variabe
11946
        is not declared 'const', add it to the list of call clobbered
11947
        variables.
11948
 
11949
        * tree-flow.h (struct var_ann_d): Add field 'is_call_clobbered'.
11950
        Change type of field 'uid' to size_t.  Update all users.
11951
        (stmt_ann_d): Add field 'makes_clobbering_call'.
11952
        (next_tree_ref_id): Remove unused variable.
11953
        (call_clobbered_vars): Declare.
11954
        (num_call_clobbered_vars): Declare.
11955
        (call_clobbered_var): New inline function.
11956
 
11957
        * tree-ssa-ccp.c (visit_phi_node): If the LHS of a PHI node is
11958
        volatile, mark the PHI node VARYING without checking its arguments.
11959
        (visit_assignment): Likewise.
11960
        (set_value): Remove.  Update all users.
11961
        (likely_value): If the statement makes aliased loads or has
11962
        volatile operands, consider it VARYING.
11963
        (get_default_value): If a variable is volatile, consider it
11964
        VARYING.
11965
 
11966
        * tree-ssa.c (init_tree_ssa): Initialize num_call_clobbered_vars
11967
        and call_clobbered_vars.
11968
        Do not create GLOBAL_VAR.  Set it to NULL_TREE.
11969
        Increase initial size for various hash tables.
11970
        (delete_tree_ssa): Reset num_call_clobbered_vars and
11971
        call_clobbered_vars.
11972
        (get_reaching_def): Rename from currdef_for.  Update all users.
11973
        Always create default definitions for variables that need them.
11974
        Callers that use to call currdef_for with the second argument set
11975
        to false now call get_value_for.
11976
        (htab_statistics): New function.
11977
        (dump_tree_ssa): Call it.
11978
        (avail_expr_eq): Also compare VUSE operands.
11979
 
11980
2003-03-21  Jeff Law  
11981
 
11982
        * tree-dfa.c: Revert vla changes from yesterday.
11983
        (find_vla_decls_r): Do not look inside TYPE_DECLs.
11984
 
11985
2003-03-20  Jeff Law  
11986
 
11987
        * gimplify.c (simplify_return_expr): Tighten condition for
11988
        converting the RHS of a MODIFY_EXPR in a RETURN_EXPR to a
11989
        simple_val.  Allow returning a RESULT_DECL directly.
11990
        * tree-dfa.c (get_expr_operands): A RESULT_DECL can have
11991
        interesting operands.
11992
        (clobber_vars_r): Handle RESULT_DECLs.
11993
        (compute_may_aliases): Initialize and free vla_htab.
11994
        (find_vla_decls): Pass vla_htab to walk_tree.
11995
        (find_vla_decls_r): Likewise.
11996
        * tree.h (SSA_DECL_P): Accept RESULT_DECLs.
11997
 
11998
2003-03-19  Jeff Law  
11999
 
12000
        * gimplify.c (simplify_return_expr): Only allow simple values
12001
        on the RHS of a MODIFY_EXPR appearing in a RETURN_EXPR.
12002
        * tree-cfg.c (make_exit_edges): We no longer need to look for
12003
        CALL_EXPRs on the RHS of a MODIFY_EXPR inside RETURN_EXPRs.
12004
 
12005
2003-03-18  Andrew Macleod  
12006
 
12007
        * tree-cfg.c (make_blocks): Use append_stmt_to_bb. Check for NULL
12008
        tsi_stmt when deciding whether to start a new block.
12009
        (add_stmt_to_bb): Don't update the basic block end pointer.
12010
        (append_stmt_to_bb): New. Add stmt and update the BB end pointer.
12011
        (first_stmt): Use only 1 return.
12012
        (last_stmt): Modified to use bsi_last().
12013
        (last_stmt_ptr): Modified to use bsi_last().
12014
        (bsi_last): New. Return an iterator to the last stmt in a block.
12015
        (bsi_from_tsi): Fix bug which wouldn't set the context properly when
12016
        within a nested BIND_EXPR.
12017
        (bsi_update_from_tsi): Insert helper which is more efficient than
12018
        bsi_from_tsi().
12019
        (bsi_link_after): link in a new stmt and update the basic block
12020
        data structures.
12021
        (bsi_insert_after): Insert a new stmt into a block.
12022
        (bsi_insert_before): Insert a new stmt into a block.
12023
        (bsi_insert_on_edge): Insert a new stmt on an edge.
12024
        * tree-flow-inline.h (is_label_stmt): Return true if stmt can be a
12025
        target of a control transfer.
12026
        * tree-flow.h (is_label_stmt, bsi_last): New prototypes.
12027
 
12028
2003-03-12  Jeff Law  
12029
 
12030
        * c-simplify.c (simplify_switch_stmt): Save the type of the original
12031
        condition in TREE_TYPE (SWITCH_EXPR (...)).  Annotate the SWITCH_EXPR
12032
        with file/line information.
12033
        * expr.c (expand_expr, case SWITCH_EXPR): Use expand_end_case_type.
12034
        * tree.def (SWITCH_EXPR): Document meaning of TREE_TYPE field of
12035
        the SWITCH_EXPR.
12036
 
12037
        * c-simplify.c (simplify_block): Set the current line number to
12038
        the line associated with the end of the block.
12039
 
12040
        * c-decl.c (finish_function): No longer save/restore the
12041
        current filename or linenumber around simplification.  Instead
12042
        save/restore it around inlining.
12043
        (c_expand_body_1): Save/restore current filename and linenumber
12044
        around expansion of trees into RTL.
12045
        * gimplify.c (simplify_function_tree): Make the current file/line
12046
        number match the non-gimple code at the end of a function.
12047
 
12048
        * tree-cfg.c: Include toplev.h.
12049
        (remove_bb): Warn about unreachable code.
12050
 
12051
        * cfgrtl.c (verify_flow_info): Ignore EDGE_EXECUTABLE, it's for
12052
        the CCP optimizer only.
12053
 
12054
        * ssa.c (convert_to_ssa): Use last_basic_block, not n_basic_blocks.
12055
 
12056
2003-03-11  Jeff Law  
12057
 
12058
        * builtins.c: Fix minor comment typo.
12059
        (expand_builtin_strcmp, expand_builtin_strncmp): Remove.
12060
        (expand_builtin_strcat, expand_builtin_strncat): Likewise.
12061
        (expand_builtin_strspn, expand_builtin_strcspn): Likewise.
12062
        (expand_builtin_strcopy, expand_builtin_strstr): Likewise.
12063
        (expand_builtin_strpbrk, expand_builtin_strchr): Likewise.
12064
        (expand_builtin_strrchr, expand_builtin_fputs): Likewise.
12065
        (simplify_builtin_memcmp, simplify_builtin_strcmp): New functions.
12066
        (simplify_builtin_strpbrk, simplify_builtin_strstr): Likewise
12067
        (simplify_builtin_strchr, simplify_builtin_strrchr): Likewise
12068
        (simplify_builtin_strcpy, simplify_builtin_strncpy): Likewise
12069
        (simplify_builtin_strncmp, simplify_builtin_strcat): Likewise
12070
        (simplify_builtin_strncat, simplify_builtin_strspn): Likewise
12071
        (simplify_builtin_strcspn, simplify_builtin_fputs): Likewise
12072
        (expand_builtin_memcmp): Use simplify_builtin_memcmp.
12073
        (simplify_builtin): New function
12074
        (expand_builtin): Use simpify_builtin to collapse several common
12075
        cases together.
12076
        * gimplify.c (simplify_call_expr): Accept new argument.  All
12077
        callers updated.  Call simplify_builtin to try and simplify builtin
12078
        function calls before we simplify their arguments.
12079
        * tree.h (simplify_builtin): Prototype.
12080
 
12081
2003-03-11  Jeff Law  
12082
 
12083
        * timevar.def (TV_TREE_SSA_TO_NORMAL): New timevar.
12084
        * tree-cfg.c (remove_stmt): Also remove special annotations
12085
        on RHS of MODIFY_EXPR statements.
12086
        * tree-dfa.c (create_stmt_ann): Update comments.  Fix formatting.
12087
        (compute_may_aliases): Make sure timevar encloses entire routine.
12088
        * tree-ssa.c (rewrite_out_of_ssa): Enclose with a timevar.
12089
        (remove_annotations_r): Avoid walking into subtrees of anything
12090
        except container nodes.  Remove the special annotation on the
12091
        RHS of MODIFY_EXPRs.
12092
 
12093
2003-03-10  Frank Ch. Eigler  
12094
 
12095
        * tree-mudflap.c (mx_xfn_indirect_ref): Allow unfolded "& ptr->field"
12096
        constructs to pass uninstrumented.  Remove TREE_ADDRESSABLE settings.
12097
        Keep array accesses to non-ADDRESSABLE objects uninstrumented.  Update
12098
        __MF_TYPE_* constants for __mf_register calls.
12099
 
12100
2003-03-10  Jeff Law  
12101
 
12102
        * c-decl.c (c_expand_body_1): Update comments relating to
12103
        re-simplification after mudflap instrumentation.  Avoid
12104
        unnecessary simplification of the function tree.
12105
        * gimplify.c (keep_function_tree_in_gimple_form): New function.
12106
        * tree-inline.c: Include tree-iterator.h and tree-simple.h
12107
        (struct inline_data): Add new TSI field.
12108
        (copy_body_r): Keep tree in gimple form when transforming a
12109
        RETURN_EXPR into a MODIFY_EXPR and GOTO_EXPR.
12110
        (initialize_inlined_parameters): Use MODIFY_EXPR, not INIT_EXPR
12111
        for initialization of inlined parameters.
12112
        (expand_call_inline): Save and restore the TSI around the
12113
        call to expand_calls_inline.  Keep the tree in gimple form
12114
        when replacing a CALL_EXPR with a BIND_EXPR for the inlined
12115
        body.
12116
        (expand_calls_inline): Revamp to provide the current TSI to
12117
        expand_call_inline when we're working with gimple form.
12118
        * Makefile.in (tree-inline.o): Update dependencies.
12119
        * tree.h (keep_function_tree_in_gimple_form): Prototype.
12120
 
12121
2003-03-10  Andrew MacLeod  
12122
 
12123
        * Makefile.in (tree.o): Add tree-iterator.h dependancy.
12124
        * sbitmap.c (sbitmap_realloc): Grow a sbitmap structure.
12125
        * sbitmap.h (sbitmap_realloc): New Prototype.
12126
        * tree-cfg.c (remove_bb): Use new format for bsi_remove.
12127
        (bsi_remove): Update iterator to refer to the next stmt.
12128
        (bsi_prev): Implement previous stmt routine.
12129
        (bsi_from_tsi): Create a block iterator from a tree iterator.
12130
        * tree-flow-inline.h (bsi_prev): Remove.
12131
        (tsi_from_bsi): Create a tree iterator from a block iterator.
12132
        * tree-flow.h (bsi_prev,bsi_remove): Update prototypes.
12133
        (bsi_from_tsi, tsi_from_bsi, bsi_insert_*): New prototypes.
12134
        (bsi_iterator_update): New enum type.
12135
        * tree-iterator.h (tree_stmt_anchor, tsi_iterator_update): New type.
12136
        (tsi_link_before, tsi_link_after, tsi_delink, tsi_new_stmt_list,
12137
        tsi_stmt_list_head): New prototypes.
12138
        * tree-ssa-dce.c (remove_dead_stmts): Update removal loop to allow
12139
        that remove_dead_stmt update's the iterator.
12140
        (remove_dead_stmt): Use a pointer to the iterator since bsi_remove
12141
        requires it.
12142
        * tree.c (tsi_link_before): New function to link a stmt before an
12143
        iterator.
12144
        (tsi_link_after): New function links stmt after an iterator.
12145
        (tsi_delink): Removes a stmt from a list.
12146
        (tsi_new_stmt_list): New function to begin a new stmt list.
12147
        (tsi_stmt_list_head): New function to get the first stmt in a list.
12148
 
12149
2003-03-07  Diego Novillo  
12150
 
12151
        * tree-cfg.c (remove_stmt): Don't assume that the statement is in
12152
        SSA form.
12153
 
12154
        * tree-flow.h (dump_tree_ssa_stats): Declare.
12155
        (debug_tree_ssa_stats): Declare.
12156
        (stmt_ann_d): Add new statement flags 'makes_aliased_loads',
12157
        'makes_aliased_stores', and 'has_volatile_ops'.
12158
        * tree-dfa.c (add_stmt_operand): Set new statement flags accordingly.
12159
 
12160
        * tree-pretty-print.c (dump_generic_node): Various cosmetic changes
12161
        to the rendering of some expressions.
12162
 
12163
        * tree-ssa.c (struct var_value_d): Rename from struct currdef_d.
12164
        Rename field 'currdef' to 'value'.  Update all users.
12165
        (avail_exprs): New local hash table.
12166
        (const_and_copies): New local hash table.
12167
        (struct ssa_stats_d): Declare.
12168
        (ssa_stats): New local variable.
12169
        (rewrite_into_ssa): Deallocate avail_exprs and const_and_copies
12170
        after renaming.
12171
        Call dump_tree_ssa_stats() if -fdump-tree-ssa-stats is given.
12172
        (rewrite_block): Document the renaming process.
12173
        Add new local stack block_avail_exprs to keep track of expressions
12174
        made available in this block and its children.
12175
        (rewrite_stmts): Move body inside rewrite_block.
12176
        (dump_tree_ssa_stats): New function.
12177
        (debug_tree_ssa_stats): New function.
12178
        (get_def_blocks): New function.
12179
        (insert_phi_nodes_for): Call it.
12180
        (rewrite_stmt): Add support for keeping track of copies, constants
12181
        and globally redundant expressions.
12182
        (rewrite_operand): If a pointer has been copy propagated into
12183
        another one, rewrite INDIRECT_REF nodes of the original pointer to
12184
        refer to the new one.
12185
        (register_new_def): Add new argument 'var' indicating which
12186
        variable is this new definition for.  Update all users.
12187
        (update_indirect_ref_vuses): New function.
12188
        (update_pointer_vuses): New function.
12189
        (init_tree_ssa): Set variable 'ssa_stats' to zero.
12190
        Allocate memory for 'avail_exprs' and 'const_and_copies'.
12191
        (currdef_for): Don't mark inline.
12192
        Call get_value_for and set_value_for.
12193
        (set_currdef_for): Remove.  Update all users.
12194
        (var_value_hash): Rename from currdef_hash.  Update all users.
12195
        (var_value_eq): Rename from currdef_eq.  Update all users.
12196
        (get_value_for): New function.
12197
        (set_value_for): New function.
12198
        (lookup_avail_expr): New function.
12199
        (avail_expr_hash): New function.
12200
        (avail_expr_eq): New function.
12201
        (get_def_blocks_for): New function.
12202
        (var_is_live): New function.
12203
 
12204
2003-03-06  Diego Novillo  
12205
 
12206
        * tree-ssa-ccp.c (likely_value): Don't assume CONSTANT if the
12207
        statement has virtual uses.
12208
 
12209
2003-03-05  Diego Novillo  
12210
 
12211
        * tree-dfa.c (opf_none, opf_is_def, opf_force_vop, opf_ignore_bp):
12212
        New flags to alter the behavior of add_stmt_operand.
12213
        (get_expr_operands): Change operand IS_DEF with FLAGS.  Update all
12214
        users.
12215
        When adding a VUSE for pointer dereferences in function arguments,
12216
        don't add a superfluous VUSE for the base pointer.
12217
        (add_stmt_operand): Remove operands IS_DEF and FORCE_VOP.  Add
12218
        operand FLAGS.  Update all users.
12219
 
12220
2003-03-05  Jason Merrill  
12221
 
12222
        * c-pretty-print.c (do_niy): Only print operands of expressions.
12223
        * tree-pretty-print.c: Likewise.
12224
 
12225
        * c-simplify.c (simplify_decl_stmt): Only simplify DECL_SIZE_UNIT.
12226
        * gimplify.c (simplify_array_ref_to_plus): New fn.
12227
        (simplify_array_ref): Use it.
12228
        (build_addr_expr_with_type): Split out from build_addr_expr.
12229
        (simplify_compound_lval): Break out an ARRAY_REF with non-constant
12230
        element size.
12231
 
12232
2003-03-05  Frank Ch. Eigler  
12233
 
12234
        * gcc.c (MFWRAP_SPEC): Remove most --wrap entries.
12235
 
12236
2003-03-03  Daniel Berlin  
12237
 
12238
        * tree-ssa-pre.c (is_strred_cand): Temporarily disable strength
12239
        reduction while working on bootstrapping.
12240
        (requires_edge_placement): Reenable for now, until an insertion
12241
        infrastructure exists that can handle critical edges.
12242
        (count_stmts_in_bb): New function, used for verifying we do
12243
        insertions properly.
12244
        (update_old_new): Fix up bb heads as well.
12245
        (do_proper_save): Handle single statement bb properly.
12246
        Handle BB's contained in BIND_EXPRS.
12247
        (code_motion): Count number of statements in bb before and after
12248
        to make sure we don't screw up boundaries.
12249
        (finalize_1): Ditto.
12250
        (rename_2): Fix subtle rename bug.
12251
        (phi_opnd_from_res): Do this the right way, by cloning the
12252
        occurrence and modifying it, as every other PRE implementation
12253
        does.
12254
        (tree_perform_ssapre): Handle comparisons too (unary exprs
12255
        currently disabled till load PRE is reimplemented).
12256
        (reset_can_be_avail): Fix can_be_avail test.
12257
 
12258
2003-03-01  Diego Novillo  
12259
 
12260
        * doc/invoke.texi: Fix typo.
12261
 
12262
2003-02-28  Aldy Hernandez  
12263
            Diego Novillo  
12264
 
12265
        * Makefile.in (OBJS): Add tree-ssa-copyprop.o.
12266
        (tree-ssa-copyprop.o): New rule.
12267
        (tree-ssa-ccp.o): Add dependency on $(TREE_SIMPLE_H).
12268
 
12269
        * timevar.def (TV_TREE_COPYPROP): New timevar.
12270
        * flags.h (flag_tree_copyprop): Declare.
12271
        * toplev.c (flag_tree_copyprop): Define.
12272
        (f_options): Add -ftree-copyprop.
12273
        * tree.h (tree_dump_index): Add TDI_copyprop.
12274
        * tree-dump.c (dump_files): Add entry for -fdump-tree-copyprop.
12275
        * doc/invoke.texi: Document -ftree-copyprop and -fdump-tree-copyprop.
12276
 
12277
        * tree-ssa-copyprop.c: New file.
12278
        * tree-flow.h (tree_ssa_copyprop): Declare.
12279
        * tree-optimize.c (optimize_function_tree): Call it.
12280
        * tree-dfa.c (add_vuse): Make extern.  Update all users.
12281
 
12282
        * tree-ssa.c (mark_def_sites): VUSEs are stored in a varray of trees.
12283
 
12284
2003-02-28  Frank Ch. Eigler  
12285
 
12286
        * tree-mudflap.c (mudflap_enqueue_decl): Ignore extern artificial
12287
        variable declarations.
12288
 
12289
2003-02-27  Diego Novillo  
12290
 
12291
        * tree-dfa.c (get_stmt_operands): INIT_EXPR nodes cannot
12292
        appear in GIMPLE form.  Don't handle them.
12293
        (get_expr_operands): Likewise.
12294
        (find_vars_r): Likewise.
12295
        * tree-ssa-ccp.c (get_rhs): Likewise.
12296
        (set_rhs): Likewise.
12297
        * tree-ssa-pre.c (tree_perform_ssapre): Likewise.
12298
 
12299
2003-02-27  Diego Novillo  
12300
 
12301
        * tree-ssa-ccp.c (ccp_fold): Fold builtins by replacing and
12302
        restoring their arguments.
12303
 
12304
2003-02-27  Jeff Law  
12305
 
12306
        * tree-dfa.c (find_vars_r): Clear *walk_subtrees appropriately
12307
        to avoid useless walking of subtrees.
12308
 
12309
        * fold-const.c (nondestructive_fold_binary_to_constant): Renamed
12310
        from nondestructive_fold_binary.  Update comments slightly.
12311
        (nondestructive_fold_unary_to_constant): Similarly.
12312
        (fold_relational_hi_lo): Corresponding changes.
12313
        * tree-ssa-ccp.c (ccp_fold): Corresponding changes.
12314
        * tree.h: Corresponding changes.
12315
 
12316
2003-02-26  Jeff Law  
12317
 
12318
        * tree-ssa-ccp.c (ccp_fold): Also handle folding of calls to
12319
        builtin functions.
12320
 
12321
        * fold-const.c (nondestructive_fold_binary): Handle truth ops
12322
        when both arguments are constant (duh!).  Handle CONJ_EXPR.
12323
 
12324
2003-02-26  Daniel Berlin  
12325
 
12326
        * flags.h: Remove flag_ip.
12327
        * toplev.c: Ditto.
12328
        * tree-alias-ander.c: s/flag_ip/flag_unit_at_a_time/g.
12329
        (andersen_cleanup): Set region to null when done.
12330
        (andersen_function_call): Check DECL_PTA_TYPEVAR, not
12331
        DECL_SAVED_TREE.
12332
        * tree-alias-common.c: s/SSA_DECL_P/DECL_P/g.
12333
        (get_alias_var_decl): Remove dead code, fix bug in what is a
12334
        local alias var.
12335
        (find_func_aliases): Use get_alias_var, not create_fun_alias_var.
12336
        (create_fun_alias_var): Fix to use DECL_PTA_TYPEVAR.
12337
        Use get_alias_var rather than create_alias_var.
12338
        (create_fun_alias_var_ptf): Ditto.
12339
        (create_alias_vars): Ditto.
12340
        * tree-dfa.c (compute_may_aliases): Fix check for
12341
        create_alias_vars.
12342
        Move deletion of alias vars back to here, from tree-ssa.c
12343
        * tree-ssa.c (delete_tree_ssa): Remove delete_alias_vars call.
12344
 
12345
2003-02-25  Jeff Law  
12346
            Diego Novillo  
12347
 
12348
        * tree-ssa-ccp.c (likely_value): If the statement has no
12349
        use operands, then return CONSTANT.
12350
 
12351
        * fold-const.c (nondestructive_fold_binary): Handle TRUTH_AND_EXPR
12352
        and TRUTH_OR_EXPR.  Placeholder for TRUTH_XOR_EXPR.
12353
        * tree-ssa-ccp.c (ccp_fold): Handle TRUTH_{AND,OR,XOR}_EXPR.
12354
        (def_to_undefined): Re-enable VARYING->UNDEFINED state transition
12355
        sanity check.
12356
 
12357
        * tree-ssa-ccp.c (likely_value): Renamed from may_fold_p.  Now
12358
        returns a latticevalue indicating the likely value for the
12359
        the RHS of the statement.
12360
        (evaluate_stmt): Update to use likely_value instead of may_fold_p.
12361
        Statements with UNDEFINED operands produce an UNDEFINED result.
12362
        (set_lattice_value): Reenable VARYING->CONSTANT sanity check.
12363
 
12364
2003-02-25  Andrew MacLeod  
12365
 
12366
        * tree-cfg.c (bsi_init): Handle BIND_EXPR nodes inside a basic block.
12367
        (bsi_next_in_bb): Likewise.
12368
 
12369
2003-02-25  Diego Novillo  
12370
 
12371
        * tree-cfg.c (parent_array): Remove.  Update all users.
12372
        (struct cfg_stats_d): Add field 'num_failed_bind_expr_merges'.
12373
        (NEXT_BLOCK_LINK): Define.
12374
        (build_tree_cfg): Call alloc_aux_for_blocks instead of
12375
        create_block_annotations.
12376
        (make_blocks): Rewrite to support basic blocks that can span whole
12377
        BIND_EXPR bodies and put control statements at the end of blocks.
12378
        Add arguments 'next_block_link' and 'bb'.  Replace 'parent_block'
12379
        with 'parent_stmt'.  Update all users.
12380
        (make_loop_expr_blocks): Replace argument 'parent_block' with 'entry'.
12381
        Add argument 'next_block_link'.  Update all users.
12382
        Don't create an empty latch block.
12383
        (make_cond_expr_blocks): Add argument 'next_block_link'.  Update
12384
        all users.
12385
        (make_switch_expr_blocks): Likewise.
12386
        (make_bind_expr_blocks): Replace 'parent_block' with 'parent_stmt'.
12387
        Add argument 'next_block_link' and 'entry'.
12388
        Don't create a new block for the BIND_EXPR node.  Extend the
12389
        existing block.
12390
        (add_stmt_to_bb): New function.
12391
        (create_bb): Remove argument 'parent_block'.  Update all users.
12392
        (create_block_annotations): Remove.  Update all users.
12393
        (make_edges): Don't handle BIND_EXPR nodes.
12394
        (make_ctrl_stmt_edges): Don't create an extra edge to the body of
12395
        the switch.
12396
        (make_loop_expr_edges): Only create an edge to the body of the
12397
        loop.
12398
        (remove_unreachable_block): Add more documentation for the special
12399
        case where a control statement entry is unreachable but its body
12400
        isn't.
12401
        Remove the basic block annotation from the head and end containers
12402
        in the block.
12403
        (disconnect_unreachable_case_labels): Don't keep the edge that goes
12404
        to the BIND_EXPR at the start of the switch body.
12405
        (dump_tree_bb): Call is_latch_block_for.
12406
        (dump_cfg_stats): Show stats about basic blocks that could not span
12407
        beyond the end of a BIND_EXPR body.
12408
        (successor_block): Use NEXT_BLOCK_LINK if the block is the last
12409
        inside a control structure.
12410
        (is_ctrl_stmt): Update documentation.
12411
        (stmt_starts_bb_p): Add new argument 'prev_t'.  Update all users.
12412
        Only labels may start a new basic block.
12413
        (stmt_ends_bb_p): Add LOOP_EXPR, TRY_FINALLY_EXPR and
12414
        TRY_CATCH_EXPR to the list.
12415
        (latch_block): Remove.
12416
        (is_latch_block_for): New function.
12417
        (set_bb_for_stmt): Reformat some code.
12418
 
12419
        * tree-flow-inline.h (set_parent_block): Remove.  Update all users.
12420
        (parent_stmt): New function.
12421
        (parent_block): Call it.
12422
 
12423
        * tree-flow.h (struct stmt_ann_d): Add field 'parent_stmt'.
12424
        (struct bb_ann_d): Remove block parent_block.
12425
 
12426
        * tree-pretty-print.c (dump_generic_node): Don't handle empty latch
12427
        nodes.
12428
 
12429
        * tree-ssa-ccp.c (def_to_undefined): Temporarily disable check for
12430
        VARYING->UNDEFINED transitions.
12431
        (set_lattice_value): Likewise for VARYING->CONSTANT transitions.
12432
 
12433
        * tree-ssa-dce.c (mark_necessary): Use parent_stmt() to traverse
12434
        all the control statements that contain the current
12435
        statement.
12436
        (makr_control_parent_necessary): Remove.  Update all users.
12437
        (stmt_useful_p): Add BIND_EXPR to the list of useful
12438
        statements.
12439
        (process_worklist): Check that the statement is
12440
        associated to a basic block.
12441
        (remove_dead_stmt): Don't assume that the block has a
12442
        postdominator.
12443
 
12444
2002-02-20  Daniel Berlin  
12445
 
12446
        * tree-alias-ander.c: Store cached ptsets in the typevar, not
12447
        a seperate hash table.
12448
        (ptset_map): Removed;
12449
        (ptset_map_eq): Ditto.
12450
        (ptset_map_hash): Ditto.
12451
        (andersen_init): Remove ptset_map.
12452
        (andersen_cleanup): Ditto.
12453
        (andersen_add_var): Ditto.
12454
        (andersen_add_var_asm): Ditto.
12455
        (andersen_may_alias): Ditto.
12456
        * tree-alias-common.c: Store typevars for DECL nodes in the tree_decl
12457
        structure.
12458
        (get_alias_var_decl): Use DECL_PTA_TYPEVAR for DECL's.
12459
        (create_alias_var): Ditto.
12460
        (find_func_aliases): CONST functions don't affect aliasing either.
12461
        (ptr_may_alias_var): Don't call get_base_symbol.
12462
        Remove decl_function_context, use DECL_CONTEXT instead.
12463
        For DECL's, use DECL_PTA_TYPEVAR.
12464
        * tree-alias-type.c (struct alias_typevar_aterm): Add ptset member.
12465
        (ALIAS_TVAR_PTSET): New macro.
12466
        * tree.h (DECL_PTA_TYPEVAR): New macro.
12467
        (struct tree_decl): Add typevar member.
12468
 
12469
2003-02-20  Jeff Law  
12470
 
12471
        * c-simplify.c (simplify_decl_stmt): Call set_vla_decl on the
12472
        temporary holding the size and unit size for a VLA.  Minor
12473
        formatting fixes.
12474
 
12475
        * ssa.c: Revert caching of immediate dominators change made on
12476
        Jan 28, 2003.
12477
 
12478
        * tree-dfa.c: Fix comment.
12479
 
12480
2003-02-20  Jeff Law  
12481
 
12482
        * tree-cfg.c (remove_bb): Update PHI nodes as edges are removed.
12483
        (cleanup_cond_expr_graph): Likewise.
12484
        (cleanup_switch_expr_graph): Likewise.
12485
        (disconnect_unreachable_case_labels): Likewise.
12486
 
12487
        * tree-ssa-dce.c (mark_control_parent_necessary): Be much more
12488
        selective about what statements in the control parents are marked
12489
        as necessary.
12490
 
12491
        * tree-dfa.c (INDIRECT_REFs and ADDRESSABLE_VARs varrays): Replace
12492
        with a single ALIASED_OBJECTs set of varrays.
12493
        (dump_dfa_stats): Corresponding changes.
12494
        (compute_may_aliases, dump_alias_info): Likewise.
12495
        (compute_alias_sets): Likesise.  Update comments.    Register
12496
        alias sets for all potentially aliased objects which are stored.
12497
        Check each potentially aliased object with the registered alias
12498
        sets.
12499
        (register_alias_set): If DEREF aliases a single registered _DECL,
12500
        then replace the _DECL's entry with DEREF.
12501
        (find_alias_for): Update comments.  Do not stop the search when
12502
        an alias is found.  There may be multiple entries with conflicting
12503
        alias sets.
12504
        (struct walk_state): New structure for statement walker callbacks.
12505
        (find_vars_r): Add logic to track loads and stores of potentially
12506
        aliased objects separately.  Various changes related to
12507
        using a single set of varrays for all aliased objects.
12508
        (add_referenced_var): Record in the var's annotation if the
12509
        var is read or written.  Various changes related to using a
12510
        single set of varrays for all the aliased objects.
12511
        (add_stmt_operand): Only set may_point_to_global_mem for INDIRECT_REFs.
12512
        * tree-flow.h (struct var_ann_d): Add new fields indicating if
12513
        the var is loaded or stored.  Explicitly note unused bitfield
12514
        entries.
12515
 
12516
2003-02-19  Jeff Law  
12517
 
12518
        * fold-const.c (fold_negate_const): New function.  Broken out of
12519
        the generic fold code.
12520
        (fold_abs_const, fold_relational_const): Likewise.
12521
        (fold_relational_hi_lo): Likewise.
12522
        (nondestructive_fold_unary, nondestructive_fold_binary): Likewise.
12523
        (fold): Use fold_negate_const, fold_abs_const, fold_relational_const,
12524
        and fold_relational_hi_lo.
12525
        * tree.h (nondestructive_fold_unary): Declare.
12526
        (nondestructive_fold_binary): Declare.
12527
        * tree-ssa-ccp.c (ccp_fold): New function.
12528
        (add_control_edge): Fix trivial formatting bug.
12529
        (evaluate_stmt): Rework to use ccp_fold instead of copying
12530
        statements.
12531
 
12532
2003-02-18  Jeff Law  
12533
 
12534
        * tree-ssa-ccp.c (visit_assignment): For simple copies, copy the
12535
        lattice values.
12536
        (defs_to_undefined): Add missing abort.
12537
        (replace_uses_in): Do not do a replacement if it would create
12538
        non GIMPLE trees.
12539
 
12540
2002-02-14  Jeff Law  
12541
 
12542
        * tree-ssa-ccp.c (def_to_undefined): Improve sanity checking code
12543
        so that it can detect invalid VARYING->UNDEFINED transitions.
12544
        (set_lattice_value): Improve sanity checking code so that it
12545
        does not trip on valid VARYING->CONSTANT transitions.
12546
 
12547
        * tree-flow.h (struct stmt_ann_d): Add new field in_ccp_worklist.
12548
        * tree-ssa-ccp.c (simulate_stmt): Renamed from simulate_def_use_edges.
12549
        (add_var_to_ssa_edges_worklist): New function.  Only add statements
12550
        to the ssa_edges worklist if they are not already on the worklist.
12551
        (def_to_undefined, def_to_varying, set_lattice_value)
12552
        (tree_ssa_ccp): Only reevaluate the statement if in_ccp_worklist
12553
        is set for the element popped off the ssa_edges worklist.
12554
        (simulate_statement): Simplify now that ssa_edges is a worklist
12555
        of statements to reevaluate rather than a worklist of defs
12556
        that need their immediate uses reevaluated.
12557
        (visit_stmt): Clear in_ccp_worklist.
12558
 
12559
        * tree-ssa-ccp.c (def_to_undefined): Directly store the new
12560
        lattice values rather than call set_value.
12561
        (def_to_varying): Likewise.
12562
        (set_lattice_value): Likewise.
12563
 
12564
        * tree-ssa-ccp.c (def_to_undefined): Add some state transition
12565
        sanity checking.  Avoid calling set_value if nothing changed.
12566
        (def_to_varying): Avoid calling set_value if nothing changed.
12567
        (set_lattice_value): Add some state transition sanity checking
12568
        for transitions into the CONSTANT state.  If the object's
12569
        "constant" value has changed to a new constant value, then the
12570
        object has a VARYING value.
12571
 
12572
        * tree-ssa-ccp.c (tree_ssa_ccp): Work through the entire
12573
        ssa_edges worklist each iteration through the main loop.
12574
 
12575
2002-02-13  Jeff Law  
12576
 
12577
        * tree-ssa-ccp.c: Fix comment formatting glitches.
12578
 
12579
        * tree-ssa-ccp.c (may_fold_p): New function.  Returns nonzero if
12580
        the given statement may fold after replacement of operands with
12581
        constants.
12582
        (evaluate_stmt): Only create a copy of the statement if there is
12583
        a reasonable chance the statement will fold.
12584
 
12585
2002-02-13  Diego Novillo  
12586
 
12587
        * Makefile.in (OBJS): Add tree-ssa-pre.o.
12588
 
12589
2003-02-13  Daniel Berlin  
12590
 
12591
        * tree-dfa.c (create_stmt_ann): Do stmt part of common annotation.
12592
        * tree-flow-inline.h (tree_stmt): Return statement tree is part of.
12593
        * tree-flow.h (struct bb_ann_d): Add ephi_nodes.
12594
        * tree-optimize.c (optimize_tree): Activate SSAPRE again.
12595
        * tree-pretty-print.c (debug_generic_expr): New function.
12596
        (debug_generic_stmt): Ditto.
12597
        (dump_generic_node): Pretty print EUSE's, EREF's,  and EPHI's.
12598
 
12599
        * tree-ssa-pre.c: Rewrite almost entirely. Now performs more
12600
        strength reduction, EPHI minimization, and keeps SSA up to date.
12601
        * tree.c (tree_size): Handle EUSE, EPHI, EREF nodes.
12602
        (tree_node_structure): Ditto.
12603
        (ephi_node_elt_check_failed): New function.
12604
        * tree.def: Add EUSE_NODE, ELEFT_NODE, EKILL_NODE, EPHI_NODE,
12605
        EEXIT_NODE.
12606
        * tree.h (EREF_NODE_CHECK): New.
12607
        (EPHI_NODE_ELT_CHECK): New.
12608
        (struct tree_eref_common): New.
12609
        (struct tree_euse_node): New.
12610
        (struct tree_ephi_node): New.
12611
        (union tree_node): Add euse, eref, ephi members.
12612
        (enum tree_node_structure): Add TS_EPHI_NODE, TS_EUSE_NODE,
12613
        TS_EREF_NODE.
12614
 
12615
2003-02-13  Daniel Berlin 
12616
            Andreas Jaeger  
12617
 
12618
        * tree-flow.h: Add some garbage collector marks.
12619
 
12620
2003-02-12  Jeff Law  
12621
 
12622
        * Makefile.in (ssa.o): Depends on $(TREE_H) and tree-flow.h
12623
        * ssa.c: Include tree.h and tree-flow.h.
12624
        (compute_dominance_frontiers_1): Use the sparse bitmap
12625
        of dominator children from the basic block's annotation
12626
        if it's available.  Otherwise build the sparse bitmap
12627
        using the result of get_dominated_by.
12628
        * tree-ssa.c (rewrite_into_ssa): Reorder things slightly so
12629
        that we can use the cached dominator children computed
12630
        by mark_def_sites in compute_dominance_frontiers.
12631
 
12632
2003-02-12  Andreas Jaeger  
12633
 
12634
        * tree-dfa.c (dump_alias_info): Cast variable of size_t properly.
12635
 
12636
2003-02-12  Daniel Berlin  
12637
 
12638
        * tree-dfa.c (find_may_aliases_for): Remove
12639
        (compute_may_aliases): Always call compute_alias_sets.
12640
 
12641
2003-02-10  Jeff Law 
12642
 
12643
        * ssa.c (compute_dominance_frontiers_1): Use a sparse bitmap
12644
        for the frontiers.
12645
        (compute_dominance_frontiers): Corresponding changes.
12646
        (convert_to_ssa): Similarly.  Convert the sparse bitmap to
12647
        a simple bitmap to avoid lots of collateral damage.
12648
        * ssa.h (compute_dominance_frontiers): Update prototype.
12649
        * tree-ssa.c (added, in_work): Kill, no longer needed.
12650
        (struct def_blocks_d): Add new bitmap (livein_blocks).
12651
        (rewrite_into_ssa): Make dominance frontiers be a sparse
12652
        bitmap instead of a simple bitmap.  Rename the "nonlocals"
12653
        simple bitmap to "globals".  Pass it into mark_def_sites.
12654
        (compute_global_livein): New function.
12655
        (mark_def_sites): Also keep track of variables which are
12656
        used before they are set.  Allow caller to allocate and
12657
        pass in a simple bitmap for global variables.  Process
12658
        items defined in the statement last.
12659
        (set_def_block): Also allocate bitmap for globals.
12660
        (set_livein_block): New function.
12661
        (def_blocks_free): Free def_blocks correctly.  Also free
12662
        livein_blocks.
12663
        (debug_def_blocks_r): Also dump the livein_blocks.
12664
        (insert_phi_nodes): Simplify now that we don't need the
12665
        added and in_work varrays.  Accept DFS as a sparse bitmap
12666
        instead of a simple bitmap.
12667
        (insert_phi_nodes_for): Rework significantly.  Pre-compute all
12668
        the insertion points for semi-pruned form.  While computing those
12669
        insertion points keep track of how many phi vector entries
12670
        would be needed at those insertion points.  When the number of
12671
        entries gets large (32), compute global life information and
12672
        use that to further pruned the number of PHI insertion points
12673
        necessary.
12674
 
12675
2003-02-09  Diego Novillo  
12676
 
12677
        * tree-dfa.c (find_vars_r): Assume that the RHS of an INDIRECT_REF,
12678
        that is also an SSA variable, is a VAR_DECL.
12679
        (get_virtual_var): Handle INDIRECT_REF nodes that are not valid SSA
12680
        variables.
12681
 
12682
        * tree-ssa-dce.c (stmt_useful_p): Revert kludge in previous commit.
12683
        VA_ARG_EXPR nodes are not inherently live.
12684
 
12685
        * tree-ssa.c (mark_def_sites): Don't process the LHS of assignments
12686
        twice.
12687
        The operand of a virtual definition constitutes a use of the
12688
        variable which should be considered a non-local if it had not been
12689
        killed inside the block.
12690
 
12691
        * tree.h (SSA_VAR_P): Only return true for INDIRECT_REFs if their
12692
        operand is a _DECL node.
12693
 
12694
2003-02-09  Diego Novillo  
12695
 
12696
        * config/rs6000/t-rs6000 (simplify-rtx.o): Compile with -Wno-error.
12697
 
12698
2003-02-08  Diego Novillo  
12699
 
12700
        * toplev.c (parse_options_and_default_flags): Enable SSA DCE by
12701
        default.
12702
 
12703
        * tree-dfa.c (get_expr_operands): Recurse into LHS of an ARRAY_REF
12704
        when it's not a regular variable.  Always recurse into the RHS.
12705
        (add_stmt_operand): Set may_point_to_global_mem for pointers that
12706
        are assigned expressions that may reference global memory.  Also
12707
        set its dereference variable to be an alias of global memory.
12708
        (dump_variable): Show may_point_to_global_mem flag.
12709
        (compute_alias_sets): Also dump all referenced variables when
12710
        dumping alias information.
12711
        (add_may_alias): Check for global memory aliasing.
12712
        (may_access_global_mem_p): Rename from may_access_global_mem.
12713
        Return true if the expression is a variable that may point to or
12714
        alias global memory.
12715
        (add_referenced_var): Pointer arguments and global pointers may
12716
        point to global memory.
12717
        (set_may_alias_global_mem): Move ...
12718
        * tree-flow-inline.h (set_may_alias_global_mem): ... here.
12719
        (set_may_point_to_global_mem): New function.
12720
        (may_point_to_global_mem_p): New function.
12721
 
12722
        * tree-ssa-dce.c (stmt_useful_p): VA_ARG_EXPRs are inherently live.
12723
        * tree-ssa.c (rewrite_into_ssa): Don't call dump_referenced_vars.
12724
 
12725
2003-02-06  Diego Novillo  
12726
 
12727
        * tree-dfa.c (struct alias_tags, alias_tags, num_alias_tags):
12728
        Remove.  Update all users.
12729
        (struct alias_set_d): New.
12730
        (alias_sets): New file local variable.
12731
        (compute_alias_sets): New function.
12732
        (compute_may_aliases): Call it when not doing points-to analysis.
12733
        (register_alias_set): New function.
12734
        (find_alias_for): New function.
12735
        (may_alias_p): Declare static.
12736
        Don't assume that VAR may not be aliased if it's a non-addressable
12737
        _DECL.
12738
        If VAR and PTR are aggregate types, check if they can have a field
12739
        that points to the other one.
12740
        (find_may_aliases_for): Move handling of global memory aliasing ...
12741
        (add_may_alias): ... here.
12742
        Also accept the base symbols for the variable and its alias.
12743
        (register_new_alias): Remove.  Update all users.
12744
        (find_alias_tag): Remove.  Update all users.
12745
        (find_vars_r): Update VAR after re-writing *TP when sharing
12746
        INDIRECT_REF nodes.
12747
        * tree-flow.h (may_alias_p): Remove declaration.
12748
 
12749
        * tree-ssa.c (rewrite_into_ssa): Include referenced variables in
12750
        default debug dumps.
12751
 
12752
        Support for VLAs.
12753
 
12754
        * tree-dfa.c (find_vla_decls): New function.
12755
        (compute_may_aliases): Call it.
12756
        (find_vla_decls_r): New function.
12757
        (dump_variable): Show whether the variable is used in a VLA
12758
        declaration.
12759
        * tree-flow-inline.h (is_vla_decl): New function.
12760
        (set_vla_decl): New function.
12761
        * tree-flow.h (struct var_ann_d): Add bitfield 'is_vla_decl'.
12762
        * tree-ssa-dce.c (need_to_preserve_store): Return true if SYM is
12763
        used inside a VLA declaration.
12764
 
12765
2003-02-05  Andrew MacLeod  
12766
 
12767
        * Makefile.in : Include new file tree-iterator.h in tree-simple.h
12768
        * gimplify.c (simplify_cleanup_point_expr): Use tsi_ rather than gsi_.
12769
        * tree-cfg.c (make_blocks, remove_bb): Use tsi_ not gsi_ routines.
12770
        (bsi_remove): Renamed from gsi_remove, use bsi_ routines.
12771
        (successor_block, first_exec_stmt): Use tsi_ not gsi_ routines.
12772
        (first_stmt, last_stmt, last_stmt_ptr): Use bsi_ not gsi_ routines.
12773
        (bsi_init): Split out from bsi_start.
12774
        (bsi_start): Renamed from gsi_start_bb, use bsi_ routines.
12775
        (bsi_next_in_bb): Moved from tree-flow-inline.h and renamed from
12776
        gsi_step_in_bb. Also verify BB of new stmt.
12777
        * tree-dfa.c (compute_immediate_uses, dump_immediate_uses,
12778
        collect_dfa_stats, compute_may_aliases): Use block_stmt_iterator.
12779
        * tree-flow-inline.h (gsi_step_in_bb): Moved to tree-cfg.c
12780
        (bsi_end_p): Renamed from gsi_end_bb_p.
12781
        (bsi_next): renamed from gsi_step_bb
12782
        (bsi_prev): New function.
12783
        (bsi_stmt_ptr): Block version of gsi_stmt_ptr.
12784
        (bsi_stmt): Block version of gsi_stmt.
12785
        (bsi_container): Block version of gsi_container.
12786
        * tree-flow.h (block_stmt_iterator): New iterator type.
12787
        * tree-iterator.h: New include file for tree_iterator.
12788
        * tree-simple.h : Include tree-iterator.h
12789
        (gimple_stmt_iterator, gsi_start, gsi_end_p, gsi_stmt_ptr,
12790
        gsi_stmt, gsi_container): Move to tree-iterator.h and rename to tsi_.
12791
        (gsi_step): Move to tree-iterator.h and renamed to tsi_next.
12792
        * tree-ssa-ccp.c (simulate_block, substitute_and_fold): Use block
12793
        iterators instead of gimple_stmt_iterator.
12794
        * tree-ssa-dce.c (mark_control_parent_necessary, find_useful_stmts,
12795
        remove_dead_stmts, remove_dead_stmt): Use block_stmt_iterator.
12796
        * tree-ssa.c (mark_def_sites, rewrite_out_of_ssa, rewrite_stmts): Use
12797
        block_stmt_iterator.
12798
 
12799
2003-02-04  Daniel Berlin  
12800
 
12801
        * tree-alias-common.c (get_alias_var_decl): If it's a global var,
12802
        make sure it doesn't get added to local_alias_vars.
12803
        (get_name): Return the right name for FUNCTION_DECL's.
12804
 
12805
2003-02-04  Diego Novillo  
12806
 
12807
        * tree-dfa.c (add_stmt_operand): Do not add a VUSE for a pointer
12808
        when clobbering its associated INDIRECT_REF variable.
12809
 
12810
2003-02-04  Diego Novillo  
12811
 
12812
        * config/rs6000/t-rs6000 (jump.o, regmove.o, c-typeck.o, cfgrtl.o,
12813
        combine.o, fold-const.o, ifcvt.o, reload1.o, rtlanal.o,
12814
        cp/decl2.o, cp/pt.o, f/where.o, java/expr.o, objc/objc-act.o,
12815
        rs6000.o, insn-emit.o): Compile with -Wno-error.
12816
 
12817
2003-02-03  Diego Novillo  
12818
            Jeff Law  
12819
 
12820
        * tree-cfg.c (make_blocks): Don't always start a new block with
12821
        COND_EXPR and SWITCH_EXPR statements.
12822
        Call stmt_ends_bb_p to determine if the current statement should be
12823
        the last in the block.
12824
        (make_cond_expr_blocks): Second argument is now the entry block
12825
        to the conditional.
12826
        (make_switch_expr_blocks): Second argument is now the entry block
12827
        to the switch.
12828
        (make_edges, make_ctrl_stmt_edges, make_loop_expr_edges,
12829
        cleanup_control_flow, cleanup_cond_expr_graph,
12830
        cleanup_switch_expr_graph, disconnect_unreachable_case_labels,
12831
        find_taken_edge, successor_block, latch_block, is_latch_block,
12832
        switch_parent): Work with the last statement of the block, not the
12833
        first.
12834
        (is_ctrl_altering_stmt): Pre-compute the code of the statement.
12835
        (stmt_starts_bb_p): Declare file local.
12836
        Don't call is_ctrl_stmt.  Check if T is a LOOP_EXPR instead.
12837
        (stmt_ends_bb_p): New function.
12838
 
12839
        * tree-flow.h (stmt_starts_bb_p): Remove declaration.
12840
 
12841
2003-02-03  Diego Novillo  
12842
 
12843
        * tree-dfa.c (find_vars_r): Share INDIRECT_REF nodes whose operand
12844
        is a VAR_DECL.
12845
        (add_referenced_var): Add additional argument 'sym'.  Update all users.
12846
        Don't call get_base_symbol.
12847
        (add_indirect_ref_var): Rename argument 'var' to 'ptr'.
12848
        (htab_hash_var): Remove.  Update all users to use htab_hash_pointer.
12849
        (htab_var_eq): Remove.  Update all users to use htab_eq_pointer.
12850
 
12851
        * tree-flow-inline.h (var_ann): Don't retrieve the annotation of
12852
        the base pointer for INDIRECT_REF variables.
12853
        (is_aliased): Remove.  Update all users.
12854
        (is_dereferenced): Remove.  Update all users.
12855
        (same_var_p): Remove.  Update all users to use pointer equality.
12856
 
12857
        * tree-simple.c (get_base_symbol): Convert tail recursion into
12858
        iteration.
12859
 
12860
        * tree-ssa.c (rewrite_out_of_ssa): Add FIXME note about overlapping
12861
        live ranges for different versions of the same variable.
12862
 
12863
2003-02-03  Jeff Law  
12864
 
12865
        * tree-dfa.c (add_referenced_var): Annotate each item in the
12866
        REFERENCED_VARS varray with a unique id.
12867
        * tree-flow.h (struct var_ann_d): Add new uid field.
12868
        * tree-ssa.c (mark_def_sites): Compute the set of variables
12869
        live across basic blocks and return them in an sbitmap.
12870
        (insert_phi_nodes): Use the set of nonlocal variables computed
12871
        by mark_def_sites to reduce the number of PHI nodes inserted.
12872
        (rewrite_into_ssa): Updated to deal with changes in
12873
        insert_phi_nodes and mark_def_sites.  Free the sbitmap returned
12874
        by mark_def_sites.
12875
 
12876
2003-02-03  Diego Novillo  
12877
 
12878
        * c-common.h (GOTO_DESTINATION): Remove.  Fix botched
12879
        merge.
12880
 
12881
2003-02-03  Diego Novillo  
12882
 
12883
        Fix warnings to allow bootstrapping with -Werror.
12884
 
12885
        * Makefile.in (c-semantics.o-warn): Add -Wno-error.
12886
        (emit-rtl.o-warn): Likewise.
12887
        (profile.o-warn): Likewise.
12888
        (tree.o-warn): Likewise.
12889
        (OBJS): Remove simple-break-elim.o and simple-goto-elim.o.
12890
        * c-pretty-print.c (print_function_decl): Remove unused function.
12891
        * bitmap.c (bitmap_last_set_bit): Initialize variable 'word'.
12892
        * c-typeck.c (build_binary_op): Initialize variable 'type'.
12893
        * combine.c (combine_simplify_rtx): Initialize variable 'reversed'.
12894
        (make_compound_operation): Initialize variable 'i'.
12895
        * dwarf2out.c (dwarf2out_finish): Initialize variable 'context'.
12896
        * expr.c (store_constructor): Initialize variables 'lo', 'hi',
12897
        'startb' and 'endb'.
12898
        (expand_expr): Initialize variable 'op0'.
12899
        * fold-const.c (fold): Initialize variable 'tem'.
12900
        * profile.c (branch_prob): Initialize variable 'prev_file_name'.
12901
        * reload.c (find_equiv_reg): Initialize variables 'valtry and
12902
        'valueno'.
12903
        * rtlanal.c (get_jump_table_offset): Initialize variable 'set'.
12904
        * ssa-ccp.c (ssa_const_prop): Fix sign mismatch warning.
12905
        * varasm.c (output_constant_def): Initialize variable 'defstr'.
12906
        * gimplify.c (simplify_expr): Initialize variables
12907
        'saved_input_filename' and 'saved_lineno'.
12908
        (simplify_compound_lval): Initialize variable 'code'.
12909
        * tree-alias-ander.c (pta_bottom): De-ansify.
12910
        (andersen_cleanup): Remove unused variables.
12911
        (andersen_heap_assign): Mark argument lhs ATTRIBUTE_UNUSED.
12912
        (pta_bottom): Remove unused function.
12913
        (pta_get_ptsize): Remove unused function.
12914
 
12915
2003-02-02  Diego Novillo  
12916
 
12917
        * tree-dfa.c (get_expr_operands): Add a VUSE for the dereference of
12918
        every pointer passed in a function call.
12919
        Move code to add an operand for the base pointer of an
12920
        INDIRECT_REF ...
12921
        (add_stmt_operand): ... here.
12922
        Add a VUSE for the base pointer of every INDIRECT_REF variable.
12923
        (find_may_aliases_for): Fix starting index for the loop that scans
12924
        INDIRECT_REFs for aliasing.
12925
        Factor code that marks two variables aliased into
12926
        register_new_alias.
12927
        (register_new_alias): New function.
12928
        (may_alias_p): Handle aliasing of structure fields.
12929
        (add_may_alias): Fix documentation.
12930
        (find_vars_r): Factor code that adds a new referenced variable into
12931
        add_referenced_var.
12932
        (add_referenced_var): New function.
12933
        (add_indirect_ref_var): New function.
12934
        (get_virtual_var): Handle variables wrapped in SSA_NAMEs.
12935
        (set_may_alias_global_mem): Move from ...
12936
        * tree-flow-inline.h: ... here.
12937
 
12938
        * tree-ssa-dce.c (need_to_preserve_store): CALL_EXPRs are
12939
        implicitly live.  VA_ARG_EXPRs are not.
12940
        (stmt_useful_p):
12941
 
12942
        * tree.h (SSA_NAME_VAR): Rename from SSA_NAME_DECL.  Update all
12943
        users.
12944
        (struct tree_ssa_name): Rename field 'decl' to 'var'.  Update all
12945
        users.
12946
        (SSA_DECL_P): Accept only VAR_DECLs and PARM_DECLs possibly wrapped
12947
        inside an SSA_NAME node.
12948
        (SSA_VAR_P): Also accept SSA_NAME nodes.
12949
 
12950
2003-02-01  Daniel Berlin  
12951
 
12952
        * Makefile.in (tree-ssa-pre2.o): Remove accidental addition.
12953
 
12954
2003-01-31  Diego Novillo  
12955
 
12956
        * tree-cfg.c (find_taken_edge_cond_expr): New function.
12957
        (find_taken_edge_switch_expr): New function.
12958
        (value_matches_some_label): New function.
12959
        (find_taken_edge): Re-structure to use the three new functions.
12960
 
12961
2003-01-30  Jason Merrill  
12962
 
12963
        * gimplify.c (simplify_function_tree): Set TREE_SIDE_EFFECTS on
12964
        the BIND_EXPR wrapper.
12965
 
12966
2003-01-30  Diego Novillo  
12967
 
12968
        * tree-dfa.c (call_may_clobber): New function.
12969
        (get_expr_operands): Call it.
12970
        (find_vars_r): Call it.
12971
 
12972
2003-01-30  Jeff Law 
12973
 
12974
        * tree-dfa.c (struct alias_tags): New.  Collector for key information
12975
        regarding alias tags.
12976
        (indirect_refs_base, indirect_refs_alias_set): New varrays.
12977
        (addressable_vars_base, addressable_vars_alias_set): Likewise.
12978
        (compute_may_aliases): Initialize and finalize the new varrays.
12979
        Update allocation of alias tags information.
12980
        (find_may_aliases_for): Extract base symbols and alias set
12981
        information for V1 and V2 from the virtual arrays and store
12982
        them into local variables.  Pass them as necessary to
12983
        may_alias_p, may_access_global_mem, find_alias_tag.  Add base
12984
        symbol and alias set when creating a new alias tag.
12985
        (find_vars_r): Fill in new varrays as needed.
12986
        (may_alias_p): Add new arguments for base and alias set of the
12987
        two origianl incoming arguments.  No longer call get_base_symbol
12988
        or get_alias_set.
12989
        (find_alias_tag,  may_access_global_mem): Similarly.
12990
        (add_stmt_operand): Update to pass additional argument to
12991
        may_access_global_mem.
12992
        (dump_alias_info): Update to deal with new alias tag structure.
12993
        * tree-flow.h (may_alias_p): Update prototype with new arguments.
12994
        * tree-ssa-pre.c (process_left_occs_and_kills): Update to pass
12995
        new arguments to may_alias_p.
12996
 
12997
2003-01-30  Daniel Berlin  
12998
 
12999
        Remove all traces of steensgaard's algorithm.
13000
        * tree-alias-steen.c: Removed.
13001
        * tree-alias-steen.h: Ditto.
13002
        * tree-alias-ecr.c: Ditto.
13003
        * tree-alias-ecr.h: Ditto.
13004
        * disjoint-set.c: Ditto.
13005
        * disjoint-set.h: Ditto.
13006
        * Makefile.in: Remove removed files.
13007
        * c-config-lang.in: Ditto.
13008
        * gengtype.c: Ditto.
13009
        * tree-alias-common.c: Don't use steen_alias_ops anymore.
13010
        * toplev.c: Remove help text and steen option.
13011
        * tree-alias-common.h: Remove PTA_STEEN.
13012
        * tree-alias-type.c: Remove all steensgaard related types and
13013
        functions.
13014
        * tree-alias-type.h: Ditto.
13015
 
13016
2003-01-30  Diego Novillo  
13017
 
13018
        * tree-cfg.c (struct cfg_stats_d): New.
13019
        (cfg_stats): New file local.
13020
        (build_tree_cfg): Start TV_TREE_CFG timer before allocating memory.
13021
        Initialize cfg_stats.
13022
        (make_blocks): Count coalesced label blocks.
13023
        (dump_tree_cfg): Call dump_cfg_stats if TDF_STATS is enabled.
13024
        (dump_cfg_stats): New.
13025
        (debug_cfg_stats): New.
13026
 
13027
        * tree-dfa.c (SCALE, LABEL, PERCENT): Move ...
13028
        * tree-flow.h: ... here
13029
 
13030
2003-01-29  Diego Novillo  
13031
 
13032
        * tree-cfg.c (make_blocks): Do not start a new block if the
13033
        previous statement and the current statement are labels of the same
13034
        kind.
13035
 
13036
2003-01-29  Diego Novillo  
13037
 
13038
        * tree-cfg.c (parent_array): Make file local.
13039
        (label_to_block_map): New file local variable.
13040
        (build_tree_cfg): Initialize label_to_block_map.
13041
        (make_edges): Don't pre-scan all the blocks looking for blocks with
13042
        labels.
13043
        (make_exit_edges): Remove argument label_to_block_map.  Update all
13044
        callers.
13045
        (make_goto_expr_edges): Likewise.
13046
        (dump_tree_bb): Check that the block has a valid annotation.
13047
        (set_bb_for_stmt): If the statement is a label, add the label to
13048
        the label_to_block_map.
13049
 
13050
        * tree-pretty-print.c (dump_vops): Check that the block has a valid
13051
        annotation.
13052
 
13053
2003-01-29  Jeff Law 
13054
 
13055
        * tree-dfa.c (find_may_aliases_for): Just accept the index of
13056
        the current indirect_ref.  Caller updated.
13057
        (num_indirect_refs, num_addressable_vars): New variables.
13058
        (indirect_refs, addressable_vars): New varrays.
13059
        (dump_dfa_status): Dump info on the indirect refs and
13060
        addressable vars.
13061
        (dump_alias_info): Similarly.
13062
        (compute_may_aliases): Initialize and finalize the new virtual
13063
        arrays and hash tables for indirect refs and addressable vars.
13064
        Include setup/teardown in the cost for alias analysis.
13065
        (find_may_aliases_for):  Split main loop into two.  The first
13066
        walks over the indirect refs and takes advantage of the
13067
        symmetric properties of the aliasing relationship to avoid
13068
        useless work.  The second loop iterates over the addressable
13069
        variables.
13070
        (find_vars_r): Rework to build all three arrays we need.
13071
 
13072
2003-01-29  Andreas Jaeger  
13073
 
13074
        * tree-alias-common.c (find_func_aliases): Remove unused variable.
13075
        (display_points_to_set_helper): #if 0 function to avoid warning
13076
        about unused function.
13077
 
13078
        * tree-alias-ecr.c (ECR_new): Remove ISO C style function
13079
        definition.
13080
        * disjoint-set.c (disjoint_set_new): Likewise.
13081
 
13082
2003-01-29  Frank Ch. Eigler  
13083
 
13084
        * tree-mudflap.c (mx_xfn_indirect_ref): Use a stack of flags for
13085
        tracking pointer dereference reads vs writes.
13086
        (mf_build_check_statement_for): Pass access-type value to __mf_check.
13087
        * c-mudflap.c (mflang_register_call): Adapt to mf-runtime.h API change.
13088
 
13089
2003-01-29  Diego Novillo  
13090
 
13091
        * Makefile.in (ssa.o): Add dependency on $(TIMEVAR_H).
13092
        * timevar.def (TV_DOM_FRONTIERS): Define.
13093
        * ssa.c (compute_dominance_frontiers): Use.
13094
 
13095
2003-01-29  Diego Novillo  
13096
 
13097
        * tree-ssa-dce.c (remove_dead_stmt): Fix uninitialized use
13098
        warning.
13099
 
13100
2003-01-28  Diego Novillo  
13101
 
13102
        * timevar.def (TV_TREE_SSA_REWRITE_BLOCKS): Adjust legend.
13103
        * tree-ssa.c (rewrite_into_ssa): Use TV_TREE_SSA_REWRITE_BLOCKS.
13104
        (mark_def_sites): Add comment.
13105
 
13106
2003-01-28  Jeff Law 
13107
 
13108
        * ssa.c (compute_dominance_frontiers_1): Use get_dominated_by
13109
        to avoid useless walks over all the basic blocks.  Use cache
13110
        of immediate dominators to avoid silly calls to get_immediate_dominator.
13111
        Do not clear elements of the frontiers bitmap.
13112
        (compute_dominance_frontiers): Compute cache of immediate
13113
        dominators and pass it to compute_dominance_frontiers_1.  Clear
13114
        the entire vector of frontiers bitmaps.
13115
 
13116
        * timevar.def (TV_TREE_SSA_REWRITE_BLOCKS): Renamed from
13117
        TV_TREE_BUILD_SSA.
13118
        (TV_TREE_SSA_OTHER): New timevar.
13119
        * tree-ssa.c (rewrite_into_ssa): Updated.  Use new TV_TREE_SSA_OTHER
13120
        timevar.
13121
 
13122
        * tree.h (LABEL_DECL_INDEX): Define for use by CFG builder.
13123
        * tree-cfg.c (make_exit_edges): Accept and pass though label to
13124
        block mapping array.
13125
        (make_goto_expr_edges): For simple gotos, lookup the destination
13126
        in the label to block mapping array.  Zap old slow code to
13127
        handle simple gotos.
13128
        (make_edges): Build the label to block mapping array.
13129
 
13130
        * tree.h (PHI_NODE_ELT_CHECK): Provide version when ENABLE_CHECKING
13131
        is not defined.
13132
 
13133
2003-01-28  Diego Novillo  
13134
 
13135
        * tree-flow-inline.h (parent_block, set_parent_block, phi_nodes):
13136
        Assume that blocks always have valid annotations.
13137
        (add_dom_child): New function.
13138
        (dominator_children): New function.
13139
 
13140
        * tree-flow.h (struct bb_ann_d): Add field 'dom_children'.
13141
 
13142
        * tree-ssa.c (mark_def_sites): Add parameter 'idom'.
13143
        Add each block BB to the set of dominator children of BB's
13144
        immediate dominator.
13145
        (rewrite_block): Remove 'idom' parameter.
13146
        Recurse into blocks set in the dominator children bitmap.
13147
 
13148
2003-01-28  Diego Novillo  
13149
 
13150
        * flags.h (flag_disable_tree_ssa): New flag.
13151
        * c-decl.c (c_expand_body): Use it.
13152
        * toplev.c: Declare it.
13153
        (f_options): Add help text for -fdisable-tree-ssa.
13154
        * doc/invoke.texi: Add documentation for -fdisable-tree-ssa.
13155
 
13156
2003-01-28  Diego Novillo  
13157
 
13158
        * Makefile.in (TREE_FLOW_H): Add dependency on $(HASHTAB_H)
13159
        (OBJS): Temporarily remove tree-ssa-pre.o.
13160
        (tree-ssa.o, c-decl.o): Add dependency on $(TREE_DUMP_H).
13161
 
13162
        * c-decl.c: Include tree-dump.h
13163
 
13164
        * c-pretty-print.c (dump_c_node): Fix rendering of GOTO_STMTs to
13165
        computed locations.
13166
        (op_prio): Don't abort on unknown operators.
13167
 
13168
        * c-simplify.c (mostly_copy_tree_r): Don't copy statement
13169
        annotations.
13170
 
13171
        * gimplify.c (simplify_addr_expr): Mark the RHS of the simplified
13172
        ADDR_EXPR addressable.
13173
        (mostly_copy_tree_r): Don't copy statement annotations.
13174
 
13175
        * old-tree-inline.c (walk_tree): Handle SSA_NAME nodes.
13176
 
13177
        * timevar.def (TV_TREE_RDEFS): Remove.
13178
        (TV_TREE_BUILD_SSA): Define.
13179
        (TV_TREE_DFA): Define.
13180
 
13181
        * tree-cfg.c: Update copyright notices.
13182
        Remove doxygen markers everywhere.
13183
        (remove_unreachable_block): New local function
13184
        (remove_unreachable_blocks): Call it.
13185
        (remove_bb): Rename from remove_tree_bb.  Update all callers.
13186
        (validate_loops): Remove unused function.
13187
        (block_invalidates_loop): Remove unused function.
13188
        (remove_stmt): Invalidate the defining statement of all the
13189
        definitions made by the statement.
13190
        Remove the annotation before replacing the statement with
13191
        empty_stmt_node.
13192
 
13193
        * tree-dfa.c: Update copyright notices.
13194
        Remove doxygen markers everywhere.
13195
        (struct clobber_data_d): Remove existing fields.  Add fields 'stmt'
13196
        and 'prev_vops'.  Update all users.
13197
        (alias_tags): Rename from alias_leaders.
13198
        (num_alias_tags): Rename from num_alias_leaders.
13199
        (struct dfa_stats_d): Declare.
13200
        (struct dfa_counts_d): Remove.  Update all users.
13201
        (TRM_*): Remove.  Update all users.
13202
        (find_tree_refs): Remove.  Update all users.
13203
        (get_stmt_operands): Rename from find_refs_in_stmt.  Update all users.
13204
        (get_expr_operands): Rename from find_refs_in_expr.  Update all users.
13205
        (add_stmt_operand): New function.
13206
        (set_def): New function.
13207
        (add_use): New function.
13208
        (add_vdef): New function.
13209
        (add_vuse): New function.
13210
        (create_phi_node): New function.
13211
        (copy_stmt): New function.
13212
        (compute_immediate_uses): New function.
13213
        (compute_immediate_uses_for): New function.
13214
        (compute_reached_uses): New function.
13215
        (compute_reaching_defs): New function.
13216
        (add_immediate_use): New function.
13217
        (create_var_ann): New function.
13218
        (create_stmt_ann): New function.
13219
        (dump_immediate_uses): New function.
13220
        (debug_immediate_uses): New function.
13221
        (dump_immediate_uses_for): New function.
13222
        (debug_immediate_uses_for): New function.
13223
        (create_ref_list, empty_ref_list, add_ref_to_list_begin,
13224
        add_ref_to_list_end, add_list_to_list_begin, add_list_to_list_end,
13225
        find_list_node, rli_start, rli_start_last, rli_start_at,
13226
        rli_delete, add_ref_to_list_after, tree_ref_size, create_ref,
13227
        add_ephi_arg, add_referenced_var, replace_ref_with,
13228
        try_replace_ref_with, replace_ref_r, replace_ref_stmt_with,
13229
        remove_ref, remove_def, reset_def_def_links, replace_phi_arg_with,
13230
        create_tree_ann, function_may_recurse_p, dump_ref, debug_ref,
13231
        dump_ref_list, dump_ref_array, debug_ref_list, debug_ref_array,
13232
        dump_phi_args, dump_if_different, count_tree_refs, ref_type_name,
13233
        ref_defines, is_killing_def, tree_ref_structure, output_ref):
13234
        Remove.  Update all users.
13235
        (dump_referenced_vars): Remove parameter 'details'.  Update all
13236
        users.
13237
        (dump_variable): Don't abort if the variable is nil.  Display all
13238
        the aliases for the variable.
13239
        (dump_dfa_stats): Handle new counters.
13240
        (collect_dfa_stats): Likewise.
13241
        (collect_dfa_stats_r): Likewise.
13242
        (find_vars_r): New function.
13243
        (compute_may_aliases): Call it via walk_tree before computing aliases.
13244
        Only use alias tags if -ftree-points-to is not given.
13245
        Call add_may_alias.
13246
        (find_may_aliases_for): Only use alias tags if -ftree-points-to is
13247
        not given.
13248
        (add_may_alias): New function.
13249
        (find_alias_tag): Rename from find_alias_leader.
13250
        (dump_alias_info): New function.
13251
        (debug_alias_info): New function.
13252
        (htab_hash_var): New function.
13253
        (htab_var_eq): New function.
13254
        (get_virtual_var): New function.
13255
 
13256
        * tree-dump.c (struct dump_option_value_info): Rename -block to
13257
        -blocks.  Add new option -vops.
13258
        (dump_function): Don't display which pass enabled the dump.
13259
 
13260
        * tree-flow-inline.h: Update copyright notices.
13261
        (var_ann): New function.
13262
        (stmt_ann): New function.
13263
        (ann_type): New function.
13264
        (bb_ann): Rename from bb_annotation.
13265
        (may_aliases): New function.
13266
        (set_may_alias_global_mem): New function.
13267
        (may_alias_global_mem_p): New function.
13268
        (set_indirect_ref): New function.
13269
        (indirect_ref): New function.
13270
        (is_dereferenced): New function.
13271
        (modify_stmt): New function.
13272
        (unmodify_stmt): New function.
13273
        (stmt_modified_p): New function.
13274
        (def_op): New function.
13275
        (use_ops): New function.
13276
        (vdef_ops): New function.
13277
        (vuse_ops): New function.
13278
        (immediate_uses): New function.
13279
        (reaching_defs): New function.
13280
        (phi_nodes): New function.
13281
        (same_var_p): New function.
13282
        (gsi_step_in_bb): Re-implement.  Check if the iterator stepped out
13283
        of the block by calling bb_for_stmt.
13284
        (gsi_end_bb_p): Rename from gsi_end_bb.  Update all users.
13285
        Call gsi_stmt to determine if the iterator has reached the end of
13286
        the block.
13287
        (ref_id, ref_type, ref_bb, ref_stmt, ref_var, imm_uses,
13288
        reached_uses, imm_reaching_def, set_imm_reaching_def,
13289
        set_phi_arg_def, phi_arg_def, set_phi_arg_edge, phi_arg_edge,
13290
        reaching_defs, phi_args, num_phi_args, phi_arg, set_phi_arg,
13291
        tree_annotation, tree_refs, add_tree_ref, remove_tree_ref,
13292
        alias_leader, set_alias_leader, set_tree_flag, clear_tree_flag,
13293
        reset_tree_flags, tree_flags, indirect_var, set_indirect_var,
13294
        bb_refs, remove_bb_ref, set_exprref_class, exprref_class,
13295
        set_exprref_inserted, exprref_inserted, set_exprref_save,
13296
        exprref_save, set_exprref_reload, exprref_reload,
13297
        set_exprref_processed, set_exprref_processed2, exprref_processed2i,
13298
        exprref_uses, set_exprref_uses, set_expruse_def, expruse_def,
13299
        set_expruse_phiop, expruse_phiop, set_expruse_phi, expruse_phi,
13300
        set_expruse_has_real_use, expruse_has_real_use,
13301
        set_exprphi_phi_args, exprphi_phi_args, num_ephi_args, ephi_arg,
13302
        set_ephi_arg, set_exprphi_downsafe, exprphi_downsafe,
13303
        set_exprphi_canbeavail, exprphi_canbeavail, set_exprphi_later,
13304
        exprphi_later, set_exprphi_extraneous, exprphi_extraneous,
13305
        exprphi_willbeavail, is_assignment_stmt, is_may_ref, is_may_def,
13306
        is_may_use, is_partial_ref, is_partial_use, is_volatile_ref,
13307
        is_volatile_def, is_volatile_use, is_clobbering_def,
13308
        is_relocating_def, is_addressof_use, is_pure_use, is_pure_def,
13309
        rli_after_end, rli_step, rli_step_rev, rli_ref, get_last_ref,
13310
        get_first_ref, ref_list_is_empty): Remove.  Update all users.
13311
 
13312
        * tree-flow.h: Update copyright notices.
13313
        Remove doxygen markers.
13314
        Include hashtab.h.
13315
        (enum tree_ann_type): New.
13316
        (struct tree_ann_common_d): New.
13317
        (struct var_ann_d): New.
13318
        (struct operands_d): New.
13319
        (struct voperands_d): New.
13320
        (operands_t): New type.
13321
        (voperands_t): New type.
13322
        (struct dataflow_d): New.
13323
        (dataflow_t): New type.
13324
        (struct stmt_ann_d): New.
13325
        (tree_ann): New type.
13326
        (var_ann_t): New type.
13327
        (stmt_ann_t): New type.
13328
        (bb_ann_t): Rename from bb_ann.
13329
        (enum tree_ref_type, TRM_*, struct ref_list_node, struct
13330
        ref_list_priv, ref_list, struct tree_ref_common, struct var_ref_d,
13331
        struct var_def_d, struct var_phi_d, struct var_use_d, struct
13332
        phi_node_arg_d, phi_node_arg, struct expr_ref_common, struct
13333
        expr_phi_d, struct expr_use_d, enum tree_ref_structure_enum, union
13334
        tree_ref_d, tree_ref, struct tree_ann_d, tree_ann, enum tree_flags,
13335
        struct dfa_counts_d, ref_list_iterator): Remove.  Update all users.
13336
        (TDFA_USE_OPS): Define.
13337
        (TDFA_USE_VOPS): Define.
13338
 
13339
        * tree-inline.c (walk_tree): Handle SSA_NAME nodes.
13340
 
13341
        * tree-optimize.c: Update copyright notices.
13342
        Remove doxygen markers.
13343
        (optimize_function_tree): Temporarily disable call to
13344
        tree_perform_ssapre.
13345
        Remove #if0 code.
13346
 
13347
        * tree-pretty-print.c (MASK_POINTER): Define.
13348
        (dump_vops): New function.
13349
        (dump_generic_node): Shorten made-up names for unnamed objects.
13350
        Hanlde PHI_NODE, VDEF_EXPR and SSA_NAME nodes.
13351
        Keep track of basic block transitions.
13352
        Call dump_vops if -vops dump option is given.
13353
        (op_prio): Don't abort if the operand is nil.
13354
        (dump_block_info): Don't keep track of basic block transitions.
13355
 
13356
        * tree-simple.c: Update copyright notices.
13357
        (get_base_symbol): Call STRIP_NOPS.
13358
        Handle SSA_NAME nodes.
13359
 
13360
        * tree-simple.h: Update copyright notices.
13361
        (gsi_end_p): Rename from gsi_end.  Update all callers.
13362
 
13363
        * tree-ssa-ccp.c: Update copyright notices.
13364
        Update code to use the new SSA infrastructure.
13365
        (const_values): New hash table to keep track of constants.
13366
        (struct value_map_d): New.
13367
        (cfg_edges): Rename from edges.  Update all users.
13368
        (set_value): New function.
13369
        (get_value): New function.
13370
        (get_default_value): New function.
13371
        (value_map_hash): New function.
13372
        (value_map_eq): New function.
13373
 
13374
        * tree-ssa-dce.c: Update copyright notice.
13375
        Update code to use new SSA infrastructure.  Factor some code into
13376
        new functions.
13377
        (dom_info): Declare with file scope.
13378
        (struct stmt_stats): Add fields 'total_phis' and 'removed_phis'.
13379
        (needed_stmts): New hash table to keep track of needed statements.
13380
        (stmt_useful_p): New function.
13381
        (find_useful_stmts): Call it.
13382
        (remove_dead_stmt, remove_dead_phis): New functions.
13383
        (remove_dead_stmts): Call them.
13384
        (need_to_preserve_store): Preserve stores to volatile variables.
13385
        (tree_ssa_dce): Rename from tree_ssa_eliminate_dead_code.  Update
13386
        all users.
13387
 
13388
        * tree-ssa.c: Update copyright notice.
13389
        Change basic algorithm to rewrite the function into SSA form
13390
        instead of building factored use-def chains.
13391
        Include hashtab.h and tree-dump.h
13392
        (next_ssa_version): New global variable.
13393
        (def_blocks): New file local variable.
13394
        (struct def_blocks_d): New.
13395
        (currdefs): New file local variable.
13396
        (struct currdef_d): New.
13397
        (rewrite_into_ssa): Rename from build_tree_ssa.  Update all users.
13398
        Call compute_may_aliases, mark_def_sites and rewrite_block.
13399
        (rewrite_block): Rename from search_fud_chains.  Call
13400
        rewrite_stmts.
13401
        (mark_def_sites): New function.
13402
        (set_def_block): New function.
13403
        (rewrite_stmts): New function.
13404
        (rewrite_stmt): New function.
13405
        (rewrite_operand): New function.
13406
        (rewrite_out_of_ssa): New function.
13407
        (remove_phi_node): New function.
13408
        (register_new_def): New function.
13409
        (def_blocks_free): New function.
13410
        (def_blocks_hash): New function.
13411
        (def_blocks_eq): New function.
13412
        (currdef_hash): New function.
13413
        (currdef_eq): New function.
13414
        (debug_def_blocks): New function.
13415
        (debug_def_blocks_r): New function.
13416
        (build_fud_chains, compute_reaching_defs, follow_chain,
13417
        dump_reaching_defs, debug_reaching_defs, set_ssa_links): Remove.
13418
        (remove_phi_arg): Rename from tree_ssa_remove_phi_alternative.
13419
        Update all users.
13420
        (init_tree_ssa): Set next_ssa_version to 1.
13421
        Create hash tables def_blocks and currdefs.
13422
        (delete_tree_ssa): Accept a FUNCTION_DECL tree as argument.  Update
13423
        all users.
13424
        (currdef_for): Add new parameter 'create_default'.  If nonzero,
13425
        create a new SSA name if none is found for the variable.
13426
        (set_currdef_for): Search in the currdefs hash table.
13427
 
13428
        * tree.c (tree_node_kind): Add new values phi_kind and
13429
        ssa_name_kind.
13430
        (tree_node_kind_names): Likewise.
13431
        (tree_size): Handle PHI_NODE and SSA_NAME nodes.
13432
        (make_node): Likewise.
13433
        (tree_node_structure): Likewise.
13434
        (phi_node_elt_check_failed): New function.
13435
        (make_phi_node): New function.
13436
        (make_ssa_name): New function.
13437
        (build_vdef_expr): New function.
13438
 
13439
        * tree.def (SSA_NAME): New code.
13440
        (VDEF_EXPR): New code.
13441
        (PHI_NODE): New code.
13442
 
13443
        * tree.h (union tree_ann_d): Forward declare.
13444
        (struct tree_common): Change type of field 'ann'.
13445
        (PHI_NODE_ELT_CHECK): Define.
13446
        (phi_node_elt_check_failed): Declare.
13447
        (VDEF_RESULT): Define.
13448
        (VDEF_OP): Define.
13449
        (SSA_NAME_DECL): Define.
13450
        (SSA_NAME_DEF_STMT): Define.
13451
        (SSA_NAME_VERSION): Define.
13452
        (struct tree_ssa_name): New.
13453
        (PHI_RESULT): Define.
13454
        (PHI_NUM_ARGS): Define.
13455
        (PHI_ARG_CAPACITY): Define.
13456
        (PHI_ARG_ELT): Define.
13457
        (PHI_ARG_EDGE): Define.
13458
        (PHI_ARG_DEF): Define.
13459
        (struct phi_arg_d): New.
13460
        (struct tree_phi_node): New.
13461
        (SSA_DECL_P): Define.
13462
        (SSA_VAR_P): Define.
13463
        (enum tree_node_structure_enum): Add values TS_SSA_NAME and
13464
        TS_PHI_NODE.
13465
        (union tree_node): Add fields 'ssa_name' and 'phi'.
13466
        (make_phi_node): Declare.
13467
        (make_ssa_name): Declare.
13468
        (build_vdef_expr): Declare.
13469
        (TDF_BLOCKS): Rename from TDF_BLOCK.
13470
        (TDF_VOPS): Define.
13471
 
13472
        * doc/invoke.texi: Document new tree dump option -vops.  Update
13473
        documentation for switch -blocks.
13474
 
13475
2003-01-27  Jeff Law 
13476
 
13477
        * gimplify.c (simplify_return_expr): Correctly handle return
13478
        expressions with side effects in functions returning void.
13479
 
13480
        * tree-ssa-ccp.c (widen_bitfield): Do not try to widen anything
13481
        except constant integers.
13482
 
13483
2003-01-26  Jeff Law 
13484
 
13485
        * c-simplify.c (simplify_decl_stmt): Fix comment typo.
13486
        Use correct predicate when "simplifying" a static initializer.
13487
 
13488
2003-01-26  Andreas Jaeger  
13489
 
13490
        * Makefile.in (gt-dependence.h): New rule.
13491
 
13492
2003-01-23  Jeff Law 
13493
 
13494
        * c-simplify.c (simplify_decl_stmt): Arrange to examine initializers
13495
        for static variables.
13496
        * gimplify.c (simplify_constructor): Kill initial is_simple_constructor
13497
        check.
13498
        (simplify_modify_expr): Get the type from the destination rather than
13499
        the toplevel expression.  Handle case where type is ARRAY_TYPE.  Ignore
13500
        TREE_STATIC for the RHS.
13501
 
13502
2003-01-24  Frank Ch. Eigler  
13503
 
13504
        * tree-mudflap.c (mf_varname_tree): Check for non-NULL DECL_NAME
13505
        before trying to cplus_demangle it.
13506
 
13507
2003-01-23  Jeff Law 
13508
 
13509
        * tree-cfg.c (make_exit_edges): Fix thinkos.
13510
 
13511
2003-01-22  Jeff Law 
13512
 
13513
        * tree-cfg.c (make_goto_expr_edges): Check the underlying
13514
        LABEL_DECL, not the LABEL_EXPR for FORCED_LABEL and NONLOCAL_LABEL.
13515
 
13516
        * gimplify.c (simplify_expr, case GOTO_EXPR): Identify and mark
13517
        labels which are targets of nonlocal gotos and mark functions which
13518
        have labels which are targets of nonlocal gotos.
13519
        (simplify_expr, case LABEL_DECL): New case.  Mark labels which
13520
        have their address taken.
13521
        * tree-cfg.c (is_nonlocal_label_block): Remove.  All callers
13522
        updated.
13523
        (make_exit_edges, case GOTO_EXPR): Handle computed gotos sanely.
13524
        (make_exit_edges, case CALL_EXPR): Handle abnormal edges from
13525
        nonlocal gotos at call sites.
13526
        (make_exit_edges, case RETURN_EXPR): Likewise.
13527
        (make_exit_edges, case MODIFY_EXPR): New case to handle abnormal
13528
        edges from nonlocal gotos as call sites.
13529
        (make_goto_expr_edges): Handle computed gotos and nonlocal gotos.
13530
        (is_ctrl_altering_stmt): Handle abnormal edges in CALL_EXPRs
13531
        functions which receive nonlocal gotos.  Similarly for CALL_EXPRs
13532
        which occur on the RHS of a MODIFY_EXPR.
13533
        * tree.h (FORCED_LABEL, NONLOCAL_LABEL): New defines.
13534
        (FUNCTION_RECEIVES_NONLOCAL_GOTO): Likewise.
13535
 
13536
2003-01-22  Frank Ch. Eigler  
13537
 
13538
        * doc/invoke.texi: Provide some information about -fmudflap.
13539
 
13540
        * tree-mudflap.c (mf_varname_tree): Conditionally invoke the C++
13541
        demangler in libiberty.  Reduce function printing verbosity.
13542
        (mf_file_function_line_tree):  Reduce function printing verbosity.
13543
        (mudflap_enqueue_decl): Use COMPLETE_TYPE_P to avoid trying to
13544
        register (get size of) void-typed objects.
13545
 
13546
2003-01-21  Jose Renau  
13547
 
13548
        * tree-flow-inline.h (get_lineno): Return -1 for nodes without
13549
        locus information.
13550
        (get_filename): Return "???" for nodes without locus information.
13551
 
13552
2003-01-21  Jeff Law 
13553
 
13554
        * tree-cfg.c (cleanup_switch_expr_graph): Wrap declaration of
13555
        switch_expr with ENABLE_CHECKING block.
13556
 
13557
        * c-simplify.c (is_last_stmt_of_scope): Wrap definition and
13558
        declaration inside and ENABLE_CHECKING block.
13559
 
13560
2003-01-20  Frank Ch. Eigler  
13561
 
13562
        * tree-mudflap.c (mx_xfn_indirect_ref): Use new TREE_LOCUS field
13563
        as a predicate for finding TREE_FILENAME etc.
13564
 
13565
2003-01-16  Daniel Berlin  
13566
 
13567
        * Remove dead PRE code.
13568
        * tree-ssa-pre.c (tree_perform_ssapre): Collect left occurrences and
13569
        kills *after* finishing collecting all expressions.
13570
 
13571
2003-01-15  Jeff Law 
13572
 
13573
        * Death to WFL nodes.
13574
        * c-aux-info.c: Replace DECL_SOURCE_FILE and DECL_SOURCE_LINE with
13575
        TREE_FILENAME and TREE_LINENO respectively when retrieving file
13576
        and line information.  Use TREE_LOCUS to copy existing information
13577
        from one node to another.  Use annotate_with_file_line to add or
13578
        replace location information on a node.  Remove support for
13579
        EXPR_WITH_FILE_LOCATION nodes.  Remove STRIP_WFL statements.
13580
        * c-common.c, c-parse.in, c-pretty-print.c, dbxout.c: Likewise.
13581
        * diagnostic.c, dwarf2out.c, dwarfout.c: Likewise.
13582
        * except.c, integrate.c, stmt.c, tree-alias-common.c: Likewise.
13583
        * tree-cfg.c, tree-dfa.c, tree-dump.c, tree-flow-inline.h: Likewise.
13584
        * tree-mudflap.c, tree-pretty-print.c, tree-simple.c: Likewise.
13585
        * tree-ssa-ccp.c, tree-ssa-dce.c, tree-ssa-pre.c: Likewise.
13586
        * varasm.c, xcoffout.c: Likewise.
13587
        * config/alpha/alpha.c: Likewise.
13588
        * config/mips/mips.c: Likewise.
13589
        * c-decl.c: Likewise.
13590
        (duplicate_decls): Also copy TREE_LOCUS from olddecl to newdecl.
13591
        (finish_function): Save and restore the current filename and
13592
        linenumber around genericizing of the function tree.
13593
        * c-simplify.c (c_simplify_stmt): Use annotate_all_with_file_line
13594
        instead of wrap_all_with_wfl.  Remove STRIP_WFL statements.
13595
        * expr.c (expand_expr): Emit line number notes for expressions
13596
        with attached file/line information.  Remove EXPR_WITH_FILE_LOCATION
13597
        support.
13598
        * gimplify.c: Kill STRIP_WFL statements.  Remove EXPR_WITH_FILE_LOCATION
13599
        support.
13600
        (simplify_expr_wfl): Kill.
13601
        (annotate_stmt_with_file_line): Renamed from wrap_with_wfl.
13602
        (annotate_all_with_file_line): Renamed from wrap_all_with_wfl.
13603
        (simplify_expr): Save and restore the current file/line around
13604
        simplification of the given expression.  Add annotation to more
13605
        nodes created during simplification.
13606
        (simplify_self_mod_expr): Add file/line location to nodes we create.
13607
        (get_initialized_tmp_var): Similarly.
13608
        * old-tree-inline.c (expand_call_inline): Use annotate_with_file_line
13609
        to add file/line information to nodes instead of wrapping them
13610
        with EXPR_WITH_FILE_LOCATION nodes.
13611
        * print-tree.c: Use TREE_FILENAME and TREE_LINENO instead of
13612
        DECL_SOURCE_FILE and DECL_SOURCE_LINE respectively.  Remove
13613
        support for EXPR_WITH_FILE_LOCATION nodes.
13614
        (print_node): Dump any file/line information that is attached to
13615
        the given node.
13616
        * tree-inline.c (walk_tree): Set lineno appropriately.
13617
        * tree-simple.h (annotate_all_with_file_line): Renamed from
13618
        wrap_all_with_wfl.  Remove STRIP_WFL statements.
13619
        * tree.c (build_expr_wfl): Kill.
13620
        (make_node): Use annotate_with_file_line.
13621
        (annotate_with_file_line): New function.
13622
        * tree.def: Remove EXPR_WITH_FILE_LOCATION.
13623
        * tree.h (tree_common): Add locus field.  Remove references to
13624
        EXPR_WITH_FILE_LOCATION.
13625
        (tree_decl): Remove locus field.
13626
        (STRIP_WFL, EXPR_WFL_*): Kill.
13627
        (DECL_SOURCE_LOCATION, DECL_SOURCE_FILE, DECL_SOURCE_LINE): Kill.
13628
        (TREE_LOCUS, TREE_FILENAME, TREE_LINENO): new.
13629
        (annotate_with_file_line): Renamed from build_expr_wfl.
13630
 
13631
        * objc/objc-act.c: Use TREE_FILENAME and TREE_LINENO to
13632
        extract file/line information from tree nodes.
13633
 
13634
2003-01-14  Frank Ch. Eigler  
13635
 
13636
        * tree-mudflap.c (mx_xfn_indirect_ref): Handle ARRAY_REF of
13637
        a COMPONENT_REF specially to avoid unnecessary checks.
13638
 
13639
2003-01-13  Frank Ch. Eigler  
13640
 
13641
        Front-end generalization.
13642
        * Makefile.in (C_AND_OBJC_OBJS): Add c-mudflap.o and dependencies.
13643
        * tree-mudflap.c: Don't include "c-tree.h" any more.
13644
        (mf_init_extern_trees): Divert to mflang_lookup_decl().
13645
        (mf_enqueue_register_call, mf_flush_enqueued_calls): Move and rename
13646
        these functions.
13647
        * tree-mudflap.h: Declare new mflang_* routines.
13648
        * c-mudflap.c: New file with C front-end mflang_* routines.
13649
        * tree-nomudflap.c (*): Call internal_error instead of abort.
13650
 
13651
2003-01-07  Steven Bosscher  
13652
 
13653
        * Makefile.in (check-g95): New test target.
13654
        (check-f95): Alias for check-g95.
13655
 
13656
2003-01-07  Diego Novillo  
13657
 
13658
        * tree-dump.c (dump_function_to_file): New function.
13659
        (dump_function): Call it.
13660
        Convert argument declaration to K&R format.
13661
        * tree-dump.h: Include splay-tree.h.
13662
        (dump_function_to_file): Declare.
13663
 
13664
        * tree-optimize.c (optimize_function_tree): Remove unused variables
13665
        dump_file and dump_flags.
13666
        (dump_current_function): Remove.  Update all users by calling
13667
        dump_function instead.
13668
        * tree.h (dump_current_function): Remove declaration.
13669
 
13670
        * Makefile.in (TREE_DUMP_H): Define.
13671
        Update targets depending on tree-dump.h to depend on $(TREE_DUMP_H).
13672
        (tree-ssa-cp.o): Remove unused target.
13673
        (tree-cfg.o): Add dependency on $(TREE_DUMP_H).
13674
        (tree-optimize.o): Likewise.
13675
        (tree-ssa-dce.o): Likewise.
13676
        (tree-ssa-ccp.o): Likewise.
13677
        (tree-ssa-pre.o): Likewise.
13678
 
13679
2003-01-02  Daniel Berlin  
13680
 
13681
        * tree-ssa-pre.c (rename_2): Fix a false matching condition.
13682
        This is actually fallout from is_default_def change.
13683
 
13684
2003-01-02  Jason Merrill  
13685
 
13686
        * c-simplify.c (c_genericize): Dump more info about the function.
13687
        Use dump_function.
13688
        * tree-dump.c (dump_function): Move from cp/optimize.c.
13689
        * tree-dump.h: Declare it.
13690
 
13691
        * gimplify.c (mostly_copy_tree_r): Remove unnecessary cases.
13692
        (unshare_expr): New fn.
13693
        * tree-inline.c (mark_local_for_remap_r, unsave_r): New fns, adapted
13694
        from C++ versions.
13695
        (lhd_unsave_expr_now): Likewise.
13696
        * tree.c (unsave_expr_now): Remove.
13697
        (unsafe_for_reeval): Labels and BIND_EXPRs are only somewhat unsafe.
13698
 
13699
        * gimplify.c (simplify_function_tree): Add an outer BIND_EXPR if
13700
        needed.
13701
        (voidify_wrapper_expr): Not static.  Abort if we try to voidify an
13702
        expression with TREE_ADDRESSABLE type.  Be clever with INDIRECT_REFs.
13703
        (foreach_stmt): Avoid redundant work.
13704
        (create_tmp_var): Abort if we try to create a temp of ADDRESSABLE type.
13705
        (simplify_expr): Simplify VTABLE_REF.
13706
        * c-simplify.c (simplify_decl_stmt): Ignore DECL_EXTERNAL decls.
13707
        (simplify_stmt_expr): Fix thinko.
13708
        (simplify_block): Don't ignore partial scopes.
13709
        (simplify_condition): New fn.
13710
        (simplify_c_loop, simplify_if_stmt, simplify_switch_stmt): Call it.
13711
        * expr.c (expand_expr) [BIND_EXPR]: Handle statics better.
13712
        * tree-inline.c (remap_decl): Remap all decls.
13713
        (declare_return_variable): Be clever with INDIRECT_REFs.
13714
        (expand_call_inline): If we have an explicit return slot, the inlined
13715
        body is void.
13716
        (walk_tree): Fix type handling.
13717
        (copy_tree_r): Don't walk into decls.
13718
        * tree-simple.c (is_simple_unary_expr): Handle VTABLE_REF.
13719
        (is_simple_id): Allow RESULT_DECL.
13720
        * tree-simple.h (gsi_stmt): Strip WFLs and NOPs.
13721
 
13722
        * gimplify.c (simplify_cond_expr): Handle void arms.  Add target parm.
13723
        (simplify_modify_expr): Pass it.  Add special handling for COND_EXPR
13724
        and CONSTRUCTOR (from Daniel Berlin).  Add want_value parm.
13725
        (simplify_expr): Pass new args. Loop sooner if language-specific
13726
        simplification happened.
13727
        (simplify_return_expr): Pass the whole MODIFY_EXPR to simplify_expr.
13728
        (simplify_target_expr): Simplify.
13729
 
13730
        * tree.def (CATCH_EXPR, EH_FILTER_EXPR): New tree codes.
13731
        * except.c (expand_eh_handler): New fn.
13732
        (expand_eh_region_end_allowed): If no types are allowed, hand off to
13733
        expand_eh_region_end_must_not_throw.
13734
        * except.h: Declare expand_eh_handler.
13735
        * expr.c (expand_expr) [TRY_CATCH_EXPR]: Use it.
13736
        [CATCH_EXPR, EH_FILTER_EXPR]: New cases.
13737
        * gimplify.c (simplify_expr) [EXC_PTR_EXPR, CATCH_EXPR,
13738
        EH_FILTER_EXPR]: New cases.
13739
        (gimple_build_eh_filter): New fn.
13740
        (maybe_protect_cleanup): New fn.
13741
        (gimple_push_cleanup): Call it.
13742
        (simplify_cleanup_point_expr): Fix thinko.
13743
        * c-simplify.c (simplify_cleanup): Call it.
13744
        * tree-simple.h: Declare it.
13745
        * Makefile.in (gimplify.o): Depend on except.h.
13746
        * tree.h (CATCH_TYPES, CATCH_BODY): New macros.
13747
        (EH_FILTER_TYPES, EH_FILTER_FAILURE): New macros.
13748
        * tree-simple.c (is_simple_id): Allow EXC_PTR_EXPR.
13749
        * c-pretty-print.c (dump_c_node) [CLEANUP_POINT_EXPR]: Support.
13750
        * tree-pretty-print.c (dump_generic_node): Likewise.
13751
        [CATCH_EXPR, EH_FILTER_EXPR, EXC_PTR_EXPR]: Support.
13752
 
13753
        * c-pretty-print.c (NIY): Print operands.
13754
        (dump_c_tree): Don't look at TREE_CHAIN if it doesn't matter.
13755
        (dump_c_node) [ARRAY_TYPE]: Handle non-constant array bounds.
13756
        [CALL_EXPR]: Pass spc down.
13757
        [VTABLE_REF]: Support.
13758
        (op_prio) [TARGET_EXPR]: Support.
13759
        (print_call_name): Handle function pointers.
13760
        * tree-pretty-print.c: Likewise.
13761
 
13762
2002-12-31  Steven Bosscher  
13763
 
13764
        * gimplify.c (create_tmp_var_noc): Remove unused function.
13765
        * tree-simple.h: Kill prototype.
13766
 
13767
2002-12-30  Diego Novillo  
13768
 
13769
        * tree-flow.h (tree_find_loops): Remove unused declaration.
13770
 
13771
2002-12-29  Daniel Berlin  
13772
 
13773
        * toplev.c: Add flag_ip, enable by default at -O4+ (This is not
13774
        set in stone, and thus, not documented).
13775
        (decode_f_option): Add warning if andersen's PTA is selected but
13776
        not compiled in.
13777
 
13778
        * flags.h: Add flag_ip.
13779
 
13780
        * tree-alias-ander.c: Fix todo.
13781
        (andersen_function_call): Return 1 if we don't need to process
13782
        the function.
13783
        (ptset_map): New map, cache points-to sets.
13784
        (andersen_op): We can do IP on all statics without help.
13785
        (andersen_init): Only init once if we are doing ip analysis.
13786
        (andersen_cleanup): Don't cleanup if we need the info for ip.
13787
        (andersen_add_var): Clear points-to set if it exists already.
13788
        (andersen_add_var_same): Ditto.
13789
        (andersen_function_call): We can do interprocedural analysis on
13790
        statics.
13791
        (andersen_may_alias): Cache points-to sets.
13792
 
13793
        * c-decl.c (c_expand_body): Don't throw away tree if flag_ip is
13794
        on, even if they are uninlinable, they may be wanted for ip
13795
        optimizations.
13796
 
13797
        * tree-alias-common.c (get_values_from_constructor): New
13798
        function to collect alias_typevars from constructors.
13799
        (alias_annot): Fix where the GTY is so gengtype picks it up.
13800
        (intra_function_call): Ignore non-pointers for global var
13801
        assignment. What arguments point to can now point to a global var
13802
        as well.
13803
        (find_func_aliases): We need to handle decl's with initials as
13804
        well.
13805
        Only call intra_function_call if we have to.
13806
        Handle constructors.
13807
        (create_fun_alias_var): Incoming pointer arguments could be
13808
        pointing to a global var, unless this is a static function and we
13809
        are doing interprocedural analysis.
13810
        (create_alias_vars): Take an fndecl argument, and use it.
13811
        (init_alias_vars): Handle ip_partial as well.
13812
        (ptr_may_alias_var): Simplify, fix.
13813
 
13814
        * tree-alias-common.h (tree_alias_ops): function_call now returns
13815
        an int, and we have an extra member named ip_partial.
13816
 
13817
        * tree-alias-steen.c (steen_ops): We can't do ip_partial.
13818
        (steen_function_call): Update definition and return 1.
13819
 
13820
        * tree-dfa.c (compute_may_aliases): Call create_alias_vars with
13821
        current_function_decl.
13822
 
13823
        * tree-flow.h (create_alias_vars): Remove proto from here, it's
13824
        in tree-alias-common.h.
13825
        (tree_perform_ssapre): Take a tree, like the other optimizers.
13826
 
13827
        * tree-optimize.c (optimize_function_tree): Call
13828
        tree_perform_ssapre with a tree.
13829
 
13830
        * tree-ssa-pre.c: Remove dead, #if 0'd code.
13831
        (tree_perform_ssapre): Use passed in tree.
13832
 
13833
2002-12-23  Frank Ch. Eigler  
13834
 
13835
        * tree-mudflap.c (mf_decl_cache_locals, mf_decl_clear_locals): New
13836
        functions.
13837
        (mudflap_c_function): Call them before/after basic transforms.
13838
        (mf_cache_shift_decl_l, ..._mask_l): New variables to track local
13839
        VAR_DECL shadows of cache parameters.
13840
        (mf_build_check_statement_for): Use and update them.
13841
 
13842
2002-12-23  Frank Ch. Eigler  
13843
 
13844
        * tree-mudflap.c (mx_register_decls): Trust incoming TREE_ADDRESSABLE
13845
        instead of own timetaking analysis.
13846
        (mf_find_addrof, mx_xfn_find_addrof): Removed functions.
13847
 
13848
2002-12-23  Steven Bosscher 
13849
 
13850
        * tree-dfa.c: Add doxygen markers in comments.
13851
 
13852
2002-12-22  Diego Novillo  
13853
 
13854
        * gimplify.c: Undo the following change:
13855
            2002-12-11  Diego Novillo  
13856
                * gimplify.c (simplify_return_expr): return statements should
13857
                  only have a GIMPLE value as argument.
13858
 
13859
        * tree-simple.c: Fix grammar for return statements.
13860
 
13861
2002-12-20  Frank Ch. Eigler  
13862
 
13863
        * tree-mudflap.c (mf_init_extern_trees): Rewrite last change
13864
        without using statement-expressions.
13865
 
13866
2002-12-19  Diego Novillo  
13867
 
13868
        * tree-cfg.c (build_tree_cfg): Make sure that TV_TREE_CFG
13869
        is popped properly.
13870
 
13871
2002-12-19  Frank Ch. Eigler  
13872
 
13873
        * tree-mudflap.c (mf_init_extern_trees): Abort gracefully if
13874
         was not included.
13875
        (*): Correct some minor compiler warnings elsewhere.
13876
 
13877
2002-12-18  Diego Novillo  
13878
 
13879
        * configure: Regenerate with autoconf 2.13.
13880
 
13881
2002-12-17  Ben Elliston  
13882
 
13883
        * tree-optimize.c (optimize_function_tree): Temporarily
13884
        disable SSA optimizations if -fmudflap is present.
13885
 
13886
2002-12-16  Ben Elliston  
13887
 
13888
        * tree-mudflap.c (mx_flag): Assert that the tree node is valid.
13889
 
13890
2002-12-14  Jason Merrill  
13891
 
13892
        * tree-dump.c (dump_files): Add .generic.  Move .inlined after it.
13893
        * tree.h (tree_dump_index): Likewise.
13894
        * c-simplify.c (c_genericize): Emit original and generic dumps here.
13895
        * c-decl.c (c_expand_body): Not here.
13896
 
13897
2002-12-13  Ben Elliston  
13898
 
13899
        * tree-dfa.c (find_refs_in_expr): Terminate comment.
13900
 
13901
2002-12-12  Steven Bosscher 
13902
 
13903
        * tree-cfg.c: Update doxygen documentation.
13904
        * tree-dfa.c: Add doxygen documentation.
13905
 
13906
2002-12-11  Steven Bosscher 
13907
 
13908
        * tree-cfg.c: Add doxygen markers in comments.
13909
        * tree-optimize.c: Likewise.
13910
        * tree-ssa.c: Likewise.
13911
 
13912
2002-12-11  Diego Novillo  
13913
 
13914
        * gimplify.c (simplify_return_expr): return statements should only
13915
        have a GIMPLE value as argument.
13916
        * tree-cfg.c (call_expr_flags): New function.
13917
        (is_ctrl_altering_stmt): Call it.
13918
        * tree-flow.h (extern): Declare it.
13919
 
13920
2002-12-06  Diego Novillo  
13921
 
13922
        * tree-cfg.c (make_goto_expr_edges): Temporary hack to prevent
13923
        removing blocks with nonlocal labels.
13924
        (is_nonlocal_label_block): Return true if DECL_NONLOCAL is set for
13925
        the label.
13926
 
13927
        * tree-dfa.c (alias_leaders): New local array.
13928
        (num_alias_leaders): New local variable.
13929
        (find_alias_leader): New local function.
13930
        (may_access_global_mem): New local function.
13931
        (find_may_aliases_for): Call them.
13932
        (compute_may_aliases): Allocate and deallocate alias_leaders.
13933
        Show alias information if -fdump-tree-...-alias flag is given.
13934
        (may_alias_p): Return true if both variables are the same.
13935
        (find_refs_in_expr): Strip WFL and NOPs from the parent statement.
13936
        If a pointer relocation is due to a function call, assignment from
13937
        a global or a function argument, mark the pointer as a may-alias
13938
        for global storage.
13939
        (dump_referenced_vars): Reformat output.
13940
        (dump_variable): Likewise.
13941
 
13942
        * tree-dump.c (dump_option_value_info): Add entry for TDF_ALIAS.
13943
        * tree.h (TDF_ALIAS): Define.
13944
        * doc/invoke.texi: Document new flag.
13945
 
13946
        * tree-flow-inline.h (may_alias_global_mem_p): New function.
13947
        * tree-flow.h (enum tree_flags): Add value TF_MAY_ALIAS_GLOBAL_MEM.
13948
        (may_alias_global_mem_p): Declare.
13949
 
13950
        * tree-simple.c (get_base_symbol): Return NULL_TREE, not NULL.
13951
        * tree-ssa-ccp.c (tree_ssa_ccp): Remove unused variable.
13952
        * tree-ssa-dce.c (need_to_preserve_store): Call
13953
        decl_function_context instead of DECL_CONTEXT.
13954
        If the symbol may alias global memory, return nonzero.
13955
 
13956
        * tree-ssa.c (dump_reaching_defs): Reformat output.
13957
        (set_currdef_for): Walk the alias leader chain, setting CURRDEF for
13958
        all the alias sets that may be affected by the definition.
13959
 
13960
2002-12-06  Daniel Berlin  
13961
 
13962
        * tree-dfa.c (may_alias_p): Fix global variables and points-to.
13963
 
13964
2002-12-03  Daniel Berlin  
13965
 
13966
        * tree-ssa.c (delete_tree_ssa):  Move call to delete_alias_vars
13967
        above resetting num_referenced_vars.
13968
 
13969
2002-12-03  Diego Novillo  
13970
 
13971
        * Makefile.in: Add dependencies on $(TM_H) and coretypes.h for the
13972
        files mentioned below.
13973
        * old-tree-inline.c: Include tm.h and coretypes.h.
13974
        * c-pretty-print.c: Likewise.
13975
        * disjoint-set.c: Likewise.
13976
        * tree-alias-ecr.c: Likewise.
13977
        * tree-alias-type.c: Likewise.
13978
        * tree-alias-ander.c: Likewise.
13979
        * tree-alias-steen.c: Likewise.
13980
        * tree-alias-common.c: Likewise.
13981
        * tree-ssa.c: Likewise.
13982
        * tree-ssa-pre.c: Likewise.
13983
        * tree-cfg.c: Likewise.
13984
        * tree-dfa.c: Likewise.
13985
        * tree-optimize.c: Likewise.
13986
        * c-simplify.c: Likewise.
13987
        * gimplify.c: Likewise.
13988
        * tree-browser.c: Likewise.
13989
        * simple-break-elim.c: Likewise.
13990
        * simple-goto-elim.c: Likewise.
13991
        * tree-dchain.c: Likewise.
13992
        * c-call-graph.c: Likewise.
13993
        * tree-simple.c: Likewise.
13994
        * tree-nomudflap.c: Likewise.
13995
        * tree-pretty-print.c: Likewise.
13996
        * tree-ssa-dce.c: Likewise.
13997
        * tree-ssa-ccp.c: Likewise.
13998
        * dependence.c: Likewise.
13999
        * tree-mudflap.c: Likewise
14000
        (mx_xfn_indirect_ref): Use size_type_node instead of c_size_type_node.
14001
 
14002
2002-12-03  Diego Novillo  
14003
 
14004
        * tree-dfa.c: Undo this change that causes bootstrap
14005
        failures:
14006
 
14007
        2002-12-02  Diego Novillo  
14008
 
14009
                * tree-dfa.c (may_alias_p): Artificial variables
14010
                can also be aliased.
14011
 
14012
2002-12-03  Andreas Jaeger  
14013
 
14014
        * tree-simple.c (right_assocify_expr): Remove unused variable.
14015
 
14016
2002-12-02  Andrew MacLeod  
14017
 
14018
        * gimplify.c (simplify_cleanup_point_expr): gsi_stmt can return NULL,
14019
        use gsi_end.
14020
        * tree-cfg.c (make_blocks): Use gsi_end, gsi_stmt can return NULL. Set
14021
        basic_block for empty_stmt_node containers.
14022
        (make_edges): Stmt's can be NULL.
14023
        (make_ctrl_stmt_edges, make_exit_edges, make_loop_expr_edges,
14024
        make_cond_expr_edges, make_goto_expr_edges, is_nonlocal_label_block,
14025
        block_invalidates_loop, cleanup_control_flow, cleanup_cond_expr_graph,
14026
        cleanup_switch_expr_graph, disconnect_unreachable_case_labels,
14027
        find_taken_edge, tree_cfg2dot, successor_block, is_latch_block,
14028
        switch_parent, first_stmt, last_stmt): Check for first_stmt() or
14029
        last_stmt() returning NULL.
14030
        (remove_tree_bb, first_exec_stmt): Use gsi_end.
14031
        (last_stmt_ptr): Iterate to find last execuatbel stmt_ptr in a block.
14032
        (gsi_start_bb): Return first non-empty stmt, if there is one.
14033
        (set_bb_for_stmt): Don't decend into an empty_stmt_node.
14034
        * tree-dfa.c (find_tree_refs): Use gsi_end.
14035
        (collect_dfa_stats): Use gsi_end_bb.
14036
        * tree-flow-inline.h (gsi_step_bb): split.
14037
        (gsi_step_in_bb): gsi_step with explicit bb specified. Never return
14038
        empty_stmt_node.
14039
        (gsi_start_bb): Move to tree-cfg.c.
14040
        (gsi_end_bb): New. Have we reached the end of a basic block.
14041
        * tree-flow.h (gsi_start_bb): Make external.
14042
        (gsi_end_bb, gsi_step_in_bb): New prototypes.
14043
        * tree-simple.h (gsi_end): renamed from gsi_after_end.
14044
        (gsi_stmt): Return NULL if stmt is an empty_stmt_node or error mark.
14045
        * tree-ssa-ccp.c (simulate_block, substitute_and_fold): Use gsi_end.
14046
        * tree-ssa-dce.c (mark_control_parent_necessary, find_useful_stmts,
14047
        remove_dead_stmts): Use gsi_end_bb.
14048
        (process_worklist): Check for NULL last_stmt.
14049
        * tree-ssa-pre.c (finalize_1): Use gsi_end_bb, gsi_stmt can be NULL.
14050
 
14051
2002-12-02  Diego Novillo  
14052
 
14053
        * tree-dfa.c (dump_ref): Display '' for NULL references.
14054
        (dump_phi_args): Handle NULL arguments.
14055
        (may_alias_p): Artificial variables can also be aliased.
14056
 
14057
2002-12-02  Daniel Berlin 
14058
 
14059
        * tree-ssa-pre.c (okay_injuring_def): inj could be null.
14060
        (get_operand):  Use instead of special casing INDIRECT_REF and
14061
        COMPONENT_REF everywhere.
14062
        (names_match_p): Fix.
14063
        (defs_match_p): Ignore partial uses.
14064
        (rename_2): Fix non-matching condition.
14065
        (update_old_new): Update the kills and lefts arrays.
14066
        (finalize_1): Set the bb for the new statement.
14067
        (update_ssa_for_new_use): Ditto.
14068
        (code_motion): Ditto.
14069
        (call_modifies_slot): Handle function pointers (where we end up
14070
        with a _DECL as our argument).
14071
        (pre_part_1_trav): Update the kills and lefts arrays.
14072
        Just use TREE_TYPE (ei->expr) for type of expression.
14073
        (add_left_occ): New helper function.
14074
        (process_left_occs_and_kills): Add other cases we need to handle.
14075
        (tree_perform_ssapre): Add new processed array, since for left
14076
        occurrences and kills, we need to process *all* statements, not
14077
        just ones we might consider candiates for PRE.
14078
 
14079
2002-12-02  Diego Novillo  
14080
 
14081
        * tree-dfa.c (find_refs_in_expr): Look for references in
14082
        VA_ARG_EXPR nodes.
14083
 
14084
2002-12-01  Diego Novillo  
14085
 
14086
        * tree-optimize.c (optimize_function_tree): Undo
14087
        inadvertent change in previous commit.
14088
 
14089
2002-12-01  Diego Novillo  
14090
 
14091
        * fold-const.c (operand_equal_p): Check for NULL TREE_TYPEs.
14092
 
14093
        * tree-cfg.c (remove_stmt): Call remove_ref.
14094
        (disconnect_unreachable_case_labels): Do not disconnect the edge
14095
        going to the block holding the BIND_EXPR node for the switch()
14096
        body.
14097
        (dump_tree_cfg): Call dump_current_function.
14098
 
14099
        * Makefile.in (tree-dfa.o): Depend on convert.h.
14100
        * tree-dfa.c: Include convert.h.
14101
        (remove_def): New local function.
14102
        (reset_def_def_links): New local function.
14103
        (replace_phi_arg_with): New local function.
14104
        (replace_ref_with): New function.
14105
        (try_replace_ref_with): Rename from replace_ref_in.
14106
        Also look for V_USE references on the LHS of assignments.
14107
        When replacing the callee of a CALL_EXPR, make sure that the type
14108
        of the new callee is compatible with the old one.
14109
        (replace_ref_r): Call operand_equal_p.
14110
        (remove_ref): New function.
14111
        (same_var_p): New function.
14112
        (dump_referenced_vars): Add new flag DETAILS.  Update all users.
14113
        (debug_referenced_vars): Likewise.
14114
 
14115
        * tree-ssa.c (dump_reaching_defs): Change output format.
14116
        (set_ssa_links): Don't set def-def links for PHI nodes.
14117
 
14118
        * tree-ssa-ccp.c (replace_uses_in): Add new argument COMMIT.
14119
        Update all users.
14120
 
14121
        * tree-optimize.c (dump_current_function): New function.
14122
        (optimize_function_tree): Call it.
14123
        * tree.h (dump_current_function): Declare.
14124
        * c-decl.c (c_expand_body): Call dump_current_function.
14125
        * tree-ssa-dce.c (tree_ssa_eliminate_dead_code): Likewise.
14126
        * tree-ssa-pre.c (tree_perform_ssapre): Likewise.
14127
        * tree-ssa.c (build_tree_ssa): Likewise.
14128
        * tree-ssa-ccp.c (tree_ssa_ccp): Likewise.
14129
        Dump variables and reaching definitions if TDF_DETAILS is set.
14130
 
14131
        * tree-pretty-print.c (print_call_name): Call dump_generic_node for
14132
        NOP_EXPR operands.
14133
 
14134
        * tree-ssa-pre.c: Don't include c-common.h nor c-tree.h
14135
        Replace calls to build_modify_expr with build everywhere.
14136
        Replace calls to deep_copy_node with copy_node_r everywhere.
14137
 
14138
2002-11-29  Andreas Jaeger  
14139
 
14140
        * c-call-graph.c (construct_call_graph): Fix format.
14141
 
14142
        * tree-alias-ander.c: Declare print_out_result.
14143
 
14144
        * tree-ssa-pre.c: Declare is_on_lhs and call_modifies_slot.
14145
 
14146
        * tree.h: Declare expand_asm_expr and add_var_to_bind_expr.
14147
 
14148
        * tree-inline.c: Declare remap_decls.
14149
 
14150
2002-11-28  Daniel Berlin  
14151
 
14152
        * tree-alias-common.h: Start adding doxygen docs.
14153
 
14154
        * tree-alias-common.c: Ditto
14155
 
14156
2002-11-28  Daniel Berlin  
14157
 
14158
        * tree-alias-ander.c: Convert debug defines and ifdefs into
14159
        dump_file use.
14160
 
14161
        * tree.h: Add TDI_pta.
14162
 
14163
        * tree-dump.c: Add dump-tree-pta and TDI_pta.
14164
 
14165
2002-11-28  Diego Novillo  
14166
 
14167
        * Makefile.in (tree-ssa-pre.o, tree-cfg.o, gimplify.o, tree-ssa-dce.o,
14168
        tree-ssa-ccp.o): Add dependency on $(TIMEVAR_H).
14169
        * timevar.def (TV_TREE_GIMPLIFY, TV_TREE_MAY_ALIAS,
14170
        TV_TREE_INSERT_PHI_NODES, TV_TREE_BUILD_FUD_CHAINS, TV_TREE_RDEFS):
14171
        New timers.
14172
        (TV_TREE_SSA): Remove.
14173
        (TV_INTEGRATION, TV_EXPAND): Switch order.
14174
        * c-decl.c (c_expand_body): Pop TV_EXPAND before running the tree
14175
        optimizers.
14176
        * gimplify.c (simplify_function_tree): Push/pop TV_TREE_GIMPLIFY.
14177
        * tree-cfg.c (build_tree_cfg): Push/pop TV_TREE_CFG.
14178
        * tree-dfa.c (compute_may_aliases): Push/pop TV_TREE_MAY_ALIAS.
14179
        * tree-ssa-ccp.c (tree_ssa_ccp): Push/pop TV_TREE_CCP.
14180
        * tree-ssa-dce.c (tree_ssa_eliminate_dead_code): Push/pop
14181
        TV_TREE_DCE.
14182
        Call compute_reaching_defs.
14183
        Remove debugging dumps before DCE.
14184
        * tree-ssa-pre.c (tree_perform_ssapre): Push/pop TV_TREE_PRE.
14185
        * tree-ssa.c (build_tree_ssa): Don't call compute_reaching_defs.
14186
        Don't call dump_reaching_defs.
14187
        (insert_phi_nodes): Push/pop TV_TREE_INSERT_PHI_NODES.
14188
        (build_fud_chains): Push/pop TV_TREE_BUILD_FUD_CHAINS.
14189
        (compute_reaching_defs): Push/pop TV_TREE_RDEFS.
14190
        Call dump_reaching_defs.
14191
        * tree-optimize.c (optimize_function_tree): Remove calls to
14192
        timevar_push and timevar_pop.
14193
 
14194
2002-11-28  Diego Novillo  
14195
 
14196
        * Makefile.in (tree-ssa.o): Add dependency on $(TIMEVAR_H) and
14197
        tree-alias-common.h.
14198
        (tree-dfa.o): Likewise.
14199
        (tree-optimize.o): Add dependency on $(TIMEVAR_H).
14200
        * tree-dfa.c (compute_may_aliases): Move call to delete_alias_vars
14201
        * tree-ssa.c (delete_tree_ssa): ... here.
14202
 
14203
2002-11-27  Diego Novillo  
14204
 
14205
        * tree-dfa.c (add_may_alias): Remove.  Update all users.
14206
        (get_alias_index): Remove.  Update all users.
14207
        (dfa_stats_d): Remove fields num_may_alias, max_num_may_alias,
14208
        num_alias_imm_rdefs and max_num_alias_imm_rdefs.  Update all users.
14209
        (may_alias_p): Make extern.  Move declaration to tree-flow.h.
14210
        (TRM_DEFAULT): Remove.  Update all users.  Update values of the
14211
        other TRM_* constants.
14212
        (create_ref): Don't initialize the PHI argument array with the
14213
        number of incoming edges.
14214
        (collect_dfa_stats): Do not traverse the function body with
14215
        walk_tree.
14216
        Free temporary hash table before returning.
14217
        (compute_may_aliases): Update comment.
14218
        (may_alias_p): Switch arguments if the first argument is not an
14219
        INDIRECT_PTR or the artificial global_var.
14220
        (find_may_aliases_for): If a pointer aliases a variable, set the
14221
        pointer to be the alias leader for the variable.
14222
        (ref_defines): Call may_alias_p.
14223
        (is_killing_def): Return false if the reaching definition is NULL.
14224
        Don't check for volatile definitions.
14225
        Change second argument to be a tree.  Update all users.
14226
 
14227
        * tree-flow-inline.h (alias_imm_reaching_def): Remove.  Update all
14228
        users.
14229
        (may_alias): Remove.  Update all users.
14230
        (set_imm_reaching_def): Check for circularity.
14231
        (alias_leader): New function.
14232
        (set_alias_leader): New function.
14233
        (is_aliased): New function.
14234
        (is_default_def): Remove.  Update all users.
14235
 
14236
        * tree-flow.h (struct var_ref_d): Remove field alias_imm_rdefs.
14237
        Update all users.
14238
        (struct var_def_d): Remove field m_default.  Update all users.
14239
        (struct tree_ann_d): Remove field may_aliases.  Update all users.
14240
        Add field alias_leader.
14241
        (struct dfa_counts_d): Remove fields num_may_alias and
14242
        num_may_alias_imm_rdefs.  Update all users.
14243
 
14244
        * tree-ssa.c: Update documentation on may-alias processing.
14245
        (set_ssa_links): Remove third argument.  Update all users.
14246
        (set_alias_imm_reaching_def): Remove.  Update all users.
14247
        (create_default_def): Likewise.
14248
        (analyze_rdefs): Likewise.
14249
        (currdef_for): Move from tree-flow-inline.h
14250
        (set_currdef_for): Likewise.
14251
        (compute_reaching_defs): Rename from compute_tree_rdefs.  Update
14252
        all users.
14253
        (follow_chain): Call is_killing_def instead of is_partial_def.
14254
        (tree_ssa_remove_phi_alternative): Remove unused variable ref.
14255
        (set_ssa_links): When processing V_USE references, make sure that
14256
        CURRDEF is a definition for the variable or one of its aliases.
14257
 
14258
2002-11-26  Sebastian Pop  
14259
 
14260
        * Makefile.in (OBJS): Add tree-browser.o.
14261
        (tree-browser.o): New dependency.
14262
        * tree-browser.c: New file.
14263
        * tree-browser.def: New file.
14264
 
14265
2002-11-26  Jason Merrill  
14266
 
14267
        Gimplify C++ cleanups.
14268
        * gimplify.c (voidify_wrapper_expr): Split out from...
14269
        (simplify_bind_expr): ...here.
14270
        (simplify_cleanup_point_expr): New fn.
14271
        (simplify_target_expr): New fn.
14272
        (gimple_conditional_context): New fn.
14273
        (gimple_push_condition, gimple_pop_condition): New fns.
14274
        (simplify_expr) [TRY_CATCH_EXPR]: Handle like TRY_FINALLY_EXPR.
14275
        * c-simplify.c (simplify_cleanup): New fn.
14276
        (c_simplify_stmt): Call it and lang_simplify_stmt.
14277
        (simplify_expr_stmt): Wrap the expr in a CLEANUP_POINT_EXPR.
14278
        (simplify_return_stmt, simplify_decl_stmt): Likewise.
14279
        (simplify_stmt_expr): Handle the STMT_EXPR_NO_SCOPE case.
14280
        (is_last_stmt_of_scope): Likewise.
14281
        * c-common.h: Declare c_genericize, c_simplify_stmt and
14282
        lang_simplify_stmt.
14283
        * c-common.c (lang_simplify_stmt): Define.
14284
 
14285
        Gimplify EXIT_EXPRs.
14286
        * gimplify.c (gimplify_loop_expr, gimplify_exit_expr): New fns.
14287
        (simplify_expr): Call them.
14288
        * expr.c (expand_expr) [LOOP_EXPR]: Pass 1 again for exit_flag.
14289
 
14290
        * tree-simple.c (right_assocify_expr): Also set TREE_SIDE_EFFECTS.
14291
 
14292
        * gimplify.c (simplify_expr): Call STRIP_TYPE_NOPS.
14293
        [REALPART_EXPR]: Don't just return.
14294
 
14295
        * tree-pretty-print.c (dump_c_node): Handle REFERENCE_TYPE.
14296
        * c-pretty-print.c (dump_c_node): Likewise.  Handle null FOR_INIT_STMT.
14297
 
14298
2002-11-25  Daniel Berlin 
14299
 
14300
        * config.gcc: Try committing the correct version.
14301
        * tree-alias-ander.c (andersen_may_alias): Add "!= NULL" to make
14302
        return a bool.
14303
 
14304
2002-11-24  Daniel Berlin  
14305
 
14306
        * configure.in: Add --with-libbanshee, passed to us by toplevel if
14307
        libbanshee was configured. Substitute appropriate definitions for
14308
        Makefile (IE disabling tree-alias-ander building) if it wasn't.
14309
        * config.in: Regenerated.
14310
        * config.gcc: Rebuild libbanshee with stage1 on darwin to work
14311
        around system compiler problem.
14312
        * configure: Regenerated.
14313
        * Makefile.in: Add banshee stuff.
14314
        * tree-alias-ander.c: New file.
14315
        * tree-alias-ander.h: New file.
14316
        * tree-alias-common.c (get_alias_var): Fix field based stuff.
14317
        (find_func_aliases): Don't walk subtrees if we processed the tree.
14318
        (ptr_may_alias_var): Fix both field-based and non-field-based lookup.
14319
 
14320
2002-11-22  Andrew MacLeod  
14321
 
14322
        * tree-ssa-dce.c (mark_necessary): Split out mark_tree_necessary. Don't
14323
        mark if tree is already marked.
14324
        (mark_tree_necessary): New. Mark tree without processing control parent.
14325
        (mark_control_parent_necessary): Remove recursion, mark trees directly.
14326
        (need_to_preserve_store): Can expression/symbol affect external values.
14327
        (tree_ssa_eliminate_dead_code): Split.
14328
        (find_useful_stmts): Find initial set of needed statements.
14329
        (process_worklist): Find statements which calculate needed statements.
14330
        (remove_dead_stmts): Delete statements which are dead.
14331
 
14332
2002-11-16  Jason Merrill  
14333
 
14334
        Improve tree dumps.
14335
        * c-pretty-print.c, tree-pretty-print.c (dump_c_node): Handle
14336
        integers larger than a host word.
14337
        (op_prio): Handle INIT_EXPR.
14338
        * gimplify.c (simplify_bind_expr): Set TREE_SIDE_EFFECTS and type
14339
        of void_type_node on the COMPOUND_EXPRs as we walk.
14340
        * tree-simple.c (right_assocify_expr): Propagate the type from cur
14341
        rather than rhs.
14342
 
14343
        * c-decl.c (finish_function): Call c_genericize instead of
14344
        simplify_function_tree.
14345
        * c-simplify.c (c_genericize): New function.
14346
        (simplify_stmt_expr): Just genericize.
14347
        (simplify_compound_literal_expr): Likewise.
14348
        (c_build_bind_expr): Don't build a block for an artificial decl.
14349
        (simplify_decl_stmt): Add the variable to the temps list iff it's
14350
        artificial.
14351
        (c_simplify_expr): Don't call push/pop_context.
14352
        * c-decl.c (build_compound_literal): Set DECL_ARTIFICIAL.
14353
        * c-tree.h: Declare c_genericize.
14354
 
14355
        * c-simplify.c (tree_build_scope): Remove.
14356
 
14357
        Remove INIT_EXPR from GIMPLE.
14358
        * c-simplify.c (simplify_decl_stmt): Use MODIFY_EXPR.
14359
        * gimplify.c (simplify_bind_expr): Likewise.
14360
        (simplify_modify_expr): Convert INIT_EXPR to MODIFY_EXPR.
14361
 
14362
        * c-simplify.c (create_tmp_var_1): Drop; change all users to call
14363
        create_tmp_var.
14364
        (gimple_add_tmp_var): Now adds to the external temps list if
14365
        available, or directly to the function otherwise.
14366
 
14367
        Avoid gratuitous unused warnings.
14368
        * c-simplify.c (simplify_expr_stmt): Check TREE_SIDE_EFFECTS
14369
        directly.  Also check for explicit conversions to void.
14370
        (expr_has_effect): Remove.
14371
 
14372
        * Makefile.in (OBJS): Remove tree-dchain.o.
14373
 
14374
        * stor-layout.c (variable_size): We don't care about
14375
        global_bindings_p if the frontend doesn't want a list of the
14376
        expressions.
14377
 
14378
2002-11-13  Diego Novillo  
14379
 
14380
        * toplev.c (parse_options_and_default_flags): Enable SSA-CCP by
14381
        default with optimization >= 1.
14382
        * tree-dfa.c (find_refs_in_expr): Clobber '*.GLOBAL_VAR', not
14383
        'GLOBAL_VAR'.
14384
        (collect_dfa_stats): Collect statistics on '*.GLOBAL_VAR'.
14385
        (compute_may_aliases): Make sure that variable is an INDIRECT_REF.
14386
        (may_alias_p): GLOBAL_VAR should alias INDIRECT_REFs.
14387
        Only check addressability on VAR_DECLs.
14388
        (find_may_aliases_for): Make sure argument is an INDIRECT_REF.
14389
        * tree-flow-inline.h (indirect_var): Call DECL_P.
14390
        (set_indirect_var): Call DECL_P.
14391
        Create annotation if it doesn't exist.
14392
        (create_indirect_ref): Move from tree-dfa.c.
14393
        * tree-flow.h (create_indirect_ref): Declare.
14394
        * tree-ssa-ccp.c (visit_phi_node): Avoid debugging dump from
14395
        accessing uninitialized data.
14396
        * tree-ssa.c (init_tree_ssa): Create an INDIRECT_REF node for
14397
        .GLOBAL_VAR.
14398
 
14399
2002-11-12  Diego Novillo  
14400
 
14401
        * tree-cfg.c (delete_tree_cfg): Call free_aux_for_blocks.
14402
        Call free_basic_block_vars.
14403
 
14404
        * gimplify.c (simplify_expr): VA_ARG_EXPR nodes are in GIMPLE form
14405
        already.
14406
        Gimplify BIT_FIELD_REF nodes.
14407
        (simplify_call_expr): Update comment.
14408
        * tree-dfa.c (find_refs_in_expr): VA_ARG_EXPR nodes make no
14409
        data references.
14410
        Handle BIT_FIELD_REF nodes.
14411
        * tree-pretty-print.c (op_prio): Don't write an error message if
14412
        the operand is not recognized.
14413
        * tree-simple.c (is_simple_unary_expr): Handle BIT_FIELD_REFs.
14414
        (is_simplifiable_builtin): Only return false for MD builtins.
14415
 
14416
2002-11-08  Diego Novillo  
14417
 
14418
        * tree-cfg.c (cleanup_switch_expr_graph): Handle edges going to
14419
        EXIT_BLOCK_PTR.
14420
        (first_stmt): Return NULL for ENTRY_BLOCK_PTR, EXIT_BLOCK_PTR and
14421
        INVALID_BLOCK.
14422
        * tree-dfa.c (find_refs_in_expr): Call mark_not_simple.
14423
 
14424
2002-11-07  Diego Novillo  
14425
 
14426
        * Makefile.in (tree-ssa.o, tree-cfg.o, tree-dfa.o): Add dependency
14427
        on function.h
14428
        * tree-cfg.c: Include function.h.
14429
        (build_tree_cfg): Set dump_file to NULL after closing the file.
14430
        (remove_tree_bb): Don't dump warnings about statements being
14431
        removed.
14432
        (dump_tree_cfg): Use current_function_name.
14433
        Check that the flowgraph is not empty before dumping the function
14434
        body.
14435
        (tree_cfg2dot): Use current_function_name.
14436
        * tree-dfa.c: Include function.h
14437
        (dump_dfa_stats): Use current_function_name.
14438
        * tree-optimize.c (optimize_function_tree): Set dump_file to NULL
14439
        after closing the file.
14440
        * tree-pretty-print.c (dump_generic_node): Make sure that the
14441
        flowgraph exists before displaying block boundaries.
14442
        * tree-ssa-ccp.c (tree_ssa_ccp): Set dump_file to NULL after
14443
        closing the file.
14444
        * tree-ssa.c: Include function.h.
14445
        (build_tree_ssa): Set tree_ssa_dump_file to NULL after closing the
14446
        file.
14447
        (dump_reaching_defs): Use current_function_name.
14448
        (dump_tree_ssa): Likewise.
14449
 
14450
2002-11-07  Diego Novillo  
14451
 
14452
        * tree-cfg.c (successor_block): Return EXIT_BLOCK_PTR if no
14453
        successor can be found while walking the nesting chain.
14454
 
14455
2002-11-07  Diego Novillo  
14456
 
14457
        * tree-cfg.c: Fix some formatting in code and comments.
14458
        (set_bb_for_stmt): Move from tree-flow-inline.h
14459
        * tree-dfa.c: Fix some formatting in code and comments.
14460
        * tree-flow-inline.h: Likewise.
14461
        * tree-flow.h: Likewise.
14462
        * tree-ssa.c: Likewise.
14463
 
14464
2002-11-06  Diego Novillo  
14465
 
14466
        * Makefile.in (tree-ssa-ccp.o): Add dependency on tree-inline.h
14467
        * tree-cfg.c (find_taken_edge): New function.
14468
        (cleanup_cond_expr_graph): Call it.
14469
        (disconnect_unreachable_case_labels): Call it.
14470
 
14471
        * tree-dfa.c (struct clobber_data_d): Remove field
14472
        parent_expr_p.  Update all users.
14473
        (find_refs_in_expr): Remove argument parent_expr_p.  Update all users.
14474
        (create_ref): Remove arguments parent_expr_p and operand_p.  Update
14475
        all users.
14476
        (replace_ref_in): Rename from replace_ref_operand_with.  Update all
14477
        users.  Find the operand in the statement and replace it with a new
14478
        operand.
14479
        (replace_ref_r): New local function.
14480
        (is_killing_def): Also handle V_PHI references.
14481
        (output_ref): Move from tree-flow-inline.h
14482
 
14483
        * tree-flow-inline.h (ref_expr): Remove.  Update all users.
14484
        (restore_ref_operand): Remove.  Update all users.
14485
        (set_output_ref): Remove.  Update all users.
14486
        (is_assignment_stmt): New function.
14487
        (is_may_def, is_may_use, is_partial_def, is_partial_use,
14488
        is_volatile_def, is_volatile_use, is_default_def,
14489
        is_clobbering_def, is_initializing_def, is_relocating_def,
14490
        is_addressof_use, is_pure_use): Check reference type first.
14491
        (is_pure_def): New function.
14492
 
14493
        * tree-flow.h (struct tree_ref_common): Remove fields expr_p,
14494
        operand_p and orig_operand.  Update all users.
14495
        (struct tree_ann_d): Remove field output_ref.  Update all users.
14496
 
14497
        * tree-ssa-ccp.c: Include tree-inline.h.
14498
        (simulate_block): Simulate every statement in the block, not its
14499
        references
14500
        (simulate_def_use_chains): Simulate statements containing uses
14501
        reached by the definition.
14502
        (substitute_and_fold): Traverse statements, not references.
14503
        Call fold_stmt.
14504
        (visit_phi_node): If PHI node is marked volatile, assume varying.
14505
        (visit_stmt): Rename from visit_expression_for.  Work on a
14506
        statement, not a reference.
14507
        (visit_assignment): Rename from visit_assignment_for.  Work on a
14508
        statement, not a reference.
14509
        (visit_cond_stmt): Rename from visit_condexpr_for.  Work on a
14510
        statement, not a reference.
14511
        (evaluate_stmt): Rename from evaluate_expr.  Work on a statement,
14512
        not a reference.
14513
        (initialize): Initialize special definitions to varying.
14514
        (replace_uses_in): Work on a statement, not an expression.
14515
        (fold_stmt): Rename from ccp_fold.  Work on a statement, not an
14516
        expression.
14517
        (get_rhs): New local function.
14518
        (set_rhs): New local function.
14519
 
14520
2002-11-06  Daniel Berlin  
14521
 
14522
        * tree-flow.h: Prototype set_bb_for_stmt, last_stmt_ptr,
14523
        add_ephi_arg, num_ephi_args, set_ephi_arg, ephi_arg.
14524
        (enum tree_ref_type): Add E_LEFT, E_KILL, E_EXIT.
14525
 
14526
        * tree-cfg.c (set_bb_for_stmt): Move to tree-flow-inline.h.
14527
        (last_stmt_ptr): New function, gives pointer to last statement in
14528
        bb.
14529
 
14530
        * tree-flow-inline.h: Add exprref_processed, exprref_processed2,
14531
        expruse_phi, num_ephi_args, set_ephi_arg, ephi_arg, add_ephi_arg.
14532
 
14533
        * tree-dfa.c (tree_ref_structure): Handle E_{LEFT,KILL,EXIT}.
14534
        (ref_type_name): Ditto.
14535
        (tree_ref_size): Ditto.
14536
        (dump_ref): E_PHI's phi_args is now a varray of phi_arg structs.
14537
        (add_ephi_arg): New function.
14538
        (remove_ref_from_list): Fix crash when node not found.
14539
        (compute_may_aliases): Add timing for points-to analysis.
14540
 
14541
        * timevar.def: Add TV_TREE_PTA.
14542
 
14543
        * tree-ssa-pre.c: Start of massive cleanup and rewriting (in
14544
        preparation for load/store PRE). No more uses of ref_expr, proper
14545
        call handling. Started removing unnecessary structures and lists,
14546
        started removing redundant and inefficient operations (IE O(n^2)
14547
        loops to process all phi operands, etc).  Basic load PRE implemented.
14548
        Code may look ugly due to large pieces commented out waiting for DFA
14549
        updating of refs to redo.
14550
 
14551
2002-11-05  Diego Novillo  
14552
 
14553
        * tree-cfg.c (create_block_annotations): New local function.
14554
        (create_bb_ann): Remove.  Update all users.
14555
        (parent_array): New local variable.
14556
        (build_tree_cfg): Initialize it.
14557
        Call create_block_annotations.
14558
        (create_bb): Call alloc_block instead of ggc_alloc to allocate
14559
        memory for basic blocks.
14560
        Don't call set_parent_block.
14561
        Grow array parent_array.
14562
        (dump_tree_cfg): Change meaning of second argument.  Make it accept
14563
        any of the TDF_* flags defined in tree.h.
14564
        (delete_tree_cfg): Call free_aux_for_blocks.
14565
        Free array parent_array.
14566
        * tree-flow-inline.h (get_filename): New function.
14567
        (is_exec_stmt): return false if T is error_mark_node.
14568
        * tree-flow.h (struct var_ref_d): Mark alias_imm_rdefs field for
14569
        garbage collection.
14570
        (get_filename): Declare.
14571
        (struct bb_ann_d): Rename from bb_ann_def.
14572
        Remove garbage collection markers.
14573
        (referenced_vars): Mark for garbage collection.
14574
        (global_var): Likewise.
14575
        (create_bb_ann): Remove.
14576
        * tree-optimize.c (optimize_function_tree): Remove CFG and SSA
14577
        after debugging dumps.
14578
 
14579
        * diagnostic.h (print_generic_stmt): Rename from print_generic_tree.
14580
        Update all users.
14581
        (print_generic_expr): Rename from print_generic_node.  Update all
14582
        users.
14583
        (PPF_BRIEF): Remove.  Update all users.
14584
        (PPF_BLOCK): Remove.  Update all users.
14585
        (PPF_LINENO): Remove.  Update all users.
14586
        (PPF_IS_STMT): Remove.  Update all users.
14587
        * flags.h (flag_dump_tree_all_ssa): Remove.  Update all users.
14588
        * toplev.c (f_options): Remove entry for -fdump-tree-all-ssa.
14589
        Update all users.
14590
        * tree-dump.c (dump_enable_all): Rename from dump_enable_all_ssa.
14591
        Update all users.
14592
        (dump_files): Add entry for -fdump-tree-all.
14593
        (dump_option_value_info): Remove entries for TDF_REFS and
14594
        TDF_RDEFS.
14595
        Add entry for TDF_BLOCK.
14596
        (dump_switch_p): If -fdump-tree-all was given, call dump_enable_all.
14597
        * tree-pretty-print.c (PPF_BRIEF): Remove.  Update all users.
14598
        (PPF_BLOCK): Remove.  Update all users.
14599
        (PPF_LINENO): Remove.  Update all users.
14600
        (PPF_IS_STMT): Remove.  Update all users.
14601
        (dumping_stmts): New local variable.
14602
        (print_generic_stmt): Rename from print_generic_tree.  Update all
14603
        users.
14604
        Set dumping_stmts to true.
14605
        (print_generic_expr): Rename from print_generic_node.  Update all
14606
        users.
14607
        Set dumping_stmts to false.
14608
        (maybe_init_pretty_print): Set last_bb to -1.
14609
        (dump_block_info): If available, dump file and line number
14610
        information for the first statement in the basic block.
14611
        * tree-ssa.c (build_tree_ssa): Dump referenced variables and
14612
        reaching definition information if -details is given.
14613
        * tree.h (enum tree_dump_index): Rename TDI_all to TDI_tu.  Update
14614
        all users.
14615
        Add new index TDI_all.
14616
        (TDF_DETAILS): Change value.
14617
        (TDF_REFS): Remove.  Update all users.
14618
        (TDF_RDEFS): Remove.  Update all users.
14619
        (TDF_BLOCK): Define.
14620
        * doc/invoke.texi: Update documentation for -fdump-tree-... flags.
14621
 
14622
2002-11-05  Frank Ch. Eigler  
14623
 
14624
        * tree-mudflap.c (mudflap_enqueue_decl, _constant): Use
14625
        size_in_bytes, not c_size_in_bytes.
14626
        (mf_init_extern_trees): Import uintptr_t typedef node from
14627
        mf-runtime.h.
14628
 
14629
2002-11-01  Diego Novillo  
14630
 
14631
        * tree-cfg.c (remove_tree_bb): Add new argument remove_stmts.
14632
        Update all callers.
14633
        (make_ctrl_stmt_edges): Add an edge to the body of a SWITCH_EXPR.
14634
        (make_cond_expr_edges): Don't try to linearize the if() subgraph.
14635
        (make_case_label_edges): Don't remove the fallthru edge from the
14636
        entry block to the switch() subgraph.
14637
        (cleanup_tree_cfg): Call cleanup_control_flow.
14638
        (remove_unreachable_blocks): Remove blocks of compound structures
14639
        before removing the entry block.
14640
        (remove_blocks): New local function.
14641
        (blocks_unreachable_p): New local function.
14642
        (is_nonlocal_label_block): New local function.
14643
        (find_subblocks): New local function.
14644
        (is_parent): New local function.
14645
        (gsi_remove): New function.
14646
        (remove_stmt): New local function.
14647
        (cleanup_control_flow): New local function.
14648
        (cleanup_cond_expr_graph): New local function.
14649
        (cleanup_switch_expr_graph): New local function.
14650
        (disconnect_unreachable_case_labels): New local function.
14651
 
14652
        * tree-dfa.c (remove_decl): New function.
14653
        (find_decl_location): New function.
14654
 
14655
        * tree-flow.h (gsi_remove): Declare.
14656
        (remove_decl): Declare.
14657
        (find_decl_location): Declare.
14658
 
14659
        * tree-ssa-ccp.c (optimize_unexecutable_edges): Remove.  Update all
14660
        users.
14661
        (ssa_ccp_df_delete_unreachable_insns): Remove.  Update all users.
14662
        (tree_ssa_ccp): Call print_generic_tree with PPF_BLOCK.
14663
 
14664
2002-10-31  Diego Novillo  
14665
 
14666
        * tree-dfa.c (create_indirect_ref): New local function.
14667
        (find_refs_in_expr): Call it.
14668
        (create_ref): Check E_* reference types with == instead of &.
14669
        (dump_ref): Likewise.
14670
        (count_tree_refs): Likewise.
14671
        * tree-ssa.c (set_ssa_links): Update documentation comment for
14672
        save_chain.
14673
 
14674
2002-10-31  Diego Novillo  
14675
 
14676
        * tree-cfg.c (remove_tree_bb): Don't walk beyond the end of the
14677
        basic block.
14678
 
14679
2002-10-26  Daniel Berlin  
14680
 
14681
        * flags.h: Remove flag_tree_points_to from here.
14682
        * toplev.c: Include tree-alias-common.h.
14683
        (flag_tree_points_to): Now of type enum pta_type, rather than
14684
        int.
14685
        (lang_independent_options): Remove flag_tree_points_to.
14686
        (display_help): Display help for tree-points-to here.
14687
        (decode_f_option): Allow selecting of points-to algorithm.
14688
        * tree-alias-common.c (varmap): Removed.
14689
        (alias_annot): Changed to a hash table.  Update all functions
14690
        appropriately.
14691
        (FIELD_BASED): New macro, switches between field-based analysis,
14692
        and field-independent analysis (field-based isn't quite done yet).
14693
        (alias_annot_entry): New, used in hash table.
14694
        (annot_eq): New function.
14695
        (annot_hash): New function.
14696
        (find_func_aliases): Handle casts, fix indendation.
14697
        (splaycount): Removed.
14698
        (splay_tree_count): Removed.
14699
        (display_points_to_set): Removed.
14700
        (splay_tree_size): Removed.
14701
        (alias_get_name): New function.
14702
        (ptr_may_alias_var): Globals are a bit funky to handle.
14703
        * tree-alias-steen.c: Use alias_get_name, rather than
14704
        print_generic_node.
14705
        (steen_simple_assign): Handle assignment of PTF's.
14706
        (test_assign): Remove.
14707
        * tree-alias-common.h (enum pta_type): New.
14708
        (alias_get_name): New.
14709
        (flag_tree_points_to): New.
14710
 
14711
2002-10-26  Diego Novillo  
14712
 
14713
        * tree-cfg.c (cleanup_tree_cfg): Uncomment call to
14714
        compact_blocks.
14715
 
14716
2002-10-26  Diego Novillo  
14717
 
14718
        * Makefile.in (tree-pretty-print.o): Depend on $(TREE_FLOW_H)
14719
        * basic-block.h (BB_COMPOUND_ENTRY): Rename from BB_CONTROL_ENTRY.
14720
        * diagnostic.h (dump_generic_tree): Remove extern declaration.
14721
        (print_generic_node_brief): Remove.  Update all users.
14722
        (PPF_BRIEF): Declare.
14723
        (PPF_BLOCK): Declare.
14724
        (PPF_LINENO): Declare.
14725
        (PPF_IS_STMT): Declare.
14726
        * tree-pretty-print.c (PPF_BRIEF): New constant.
14727
        (PPF_BLOCK): New constant.
14728
        (PPF_LINENO): New constant.
14729
        (PPF_IS_STMT): New constant.
14730
        (dump_block_info): New local function.
14731
        (last_bb): New local variable.
14732
        (dump_generic_tree): Remove unused function.
14733
        (print_generic_tree): Add third argument 'flags'.  Update all
14734
        users.
14735
        (print_generic_node_brief): Remove.  Update all users.
14736
        (print_generic_node): Add third argument 'flags'.  Update all
14737
        users.
14738
        (dump_generic_node): Add third argument 'flags'.  Update all users.
14739
        If PPF_BLOCK is set, display basic block information at basic block
14740
        boundaries.
14741
        If PPF_IS_STMT is set, change the way COMPOUND_EXPR nodes are
14742
        rendered.
14743
        If PPF_BRIEF is set, don't show the bodies of control statements.
14744
        (print_declaration):
14745
 
14746
        * toplev.c (process_options): Update comment for -fdisable-simple.
14747
 
14748
        * tree-cfg.c (remove_tree_bb): Rename from tree_delete_bb.
14749
        (latch_block): Move declaration to tree-flow.h.  Declare extern.
14750
        (make_blocks): Start a new block after finding a control flow
14751
        altering statement.
14752
        (make_loop_expr_blocks): Set the loop entry block to be the parent
14753
        block for the loop latch block.
14754
        (cleanup_tree_cfg): Rename from tree_cleanup_cfg.
14755
        Call compact_blocks.
14756
        (remove_tree_bb): Rename from tree_delete_bb.  Update all users.
14757
        (dump_tree_bb): Rename from dump_tree_bb.  Update all users.
14758
        Dump information about loop latch blocks.
14759
        (debug_tree_bb): Rename from tree_debug_bb.  Update all users.
14760
        (debug_tree_cfg): Rename from tree_debug_cfg.  Update all users.
14761
        (dump_tree_cfg): Rename from tree_dump_cfg.  Update all users.
14762
        By default, dump the function with markers for basic block
14763
        boundaries.
14764
        (successor_block): If we can't find a successor following the
14765
        parent chain, return the next block in the linked list of blocks.
14766
        Update documentation comments.
14767
        (stmt_starts_bb_p): Don't let RETURN_EXPR start a new block.
14768
        (is_latch_block): New function.
14769
        (first_exec_stmt): Don't treat BIND_EXPR nodes as a special case.
14770
        (first_stmt): Return NULL_TREE if the block does not exist.
14771
        (last_stmt): Likewise.
14772
 
14773
        * tree-dfa.c (find_tree_refs): Rename from tree_find_refs.  Update
14774
        all users.
14775
        (find_refs_in_stmt): Handle BIND_EXPR nodes.
14776
        (rli_start): Move from tree-flow-inline.h
14777
        (rli_start_last): Likewise.
14778
        (rli_start_at): Likewise.
14779
        (rli_delete): Likewise.
14780
 
14781
        * tree-flow-inline.h (gsi_start_bb): Handle NULL blocks.
14782
        (ref_list_is_empty): New function.
14783
        * tree-flow.h (rli_start): Change declaration to extern.
14784
        (rli_start_last): Likewise.
14785
        (rli_start_at): Likewise.
14786
        (rli_delete): Declare.
14787
        (latch_block): Declare.
14788
        (is_latch_block): Declare.
14789
        (get_last_ref): Change to inline declaration.
14790
        (get_first_ref): Likewise.
14791
        (ref_list_empty): Declare.
14792
 
14793
        * tree-optimize.c (delete_tree_ssa): Remove declaration.
14794
 
14795
        * tree-ssa-dce.c (mark_control_parent_necessary): Call gsi_step_bb
14796
        instead of gsi_step.
14797
        (tree_ssa_eliminate_dead_code): Likewise.
14798
 
14799
        * tree-ssa.c (compute_tree_rdefs): Rename from compute_tree_rdefs.
14800
        Update all users.
14801
 
14802
2002-10-22  Diego Novillo  
14803
 
14804
        * tree-dfa.c (struct dfa_stats_d): Add field size_tree_refs.
14805
        (tree_ref_size): New function.
14806
        (create_ref): Call it.
14807
        (dump_dfa_stats): Get total size from dfa_stats.size_tree_refs.
14808
        (count_tree_refs): Call tree_ref_size.
14809
        * tree-flow-inline.h (get_last_ref): New function.
14810
        (get_first_ref): New function.
14811
        * tree-flow.h (struct var_ref_d): Rename from var_ref.
14812
        (struct var_def_d): Rename from var_def.
14813
        (struct var_phi_d): Rename from var_phi.
14814
        (struct var_use_d): Rename from var_use.
14815
        (struct expr_phi_d): Rename from expr_phi.
14816
        (struct expr_use_d): Rename from expr_use.
14817
        * tree-ssa-ccp.c (tree_ssa_ccp): Call get_last_ref.
14818
 
14819
2002-10-21  Daniel Berlin  
14820
 
14821
        * timevar.def: Add TV_TREE_{PRE,CCP,DCE,CFG,SSA}} timevars.
14822
 
14823
        * tree-optimize.c (optimize_function_tree): Push and pop timevars
14824
        for the tree optimizers.
14825
 
14826
2002-10-21  Diego Novillo  
14827
 
14828
        * Makefile.in (OBJS): Move tree-mudflap.o ...
14829
        (C_AND_OBJC_OBJS): ... here.
14830
 
14831
2002-10-21  Diego Novillo  
14832
 
14833
        * tree-flow-inline.h (rli_start): New function.
14834
        (rli_start_rev): New function.
14835
        (rli_start_at): New function.
14836
        (rli_after_end): New function.
14837
        (rli_step): New function.
14838
        (rli_step_rev): New function.
14839
        (rli_ref): New function.
14840
        * tree-flow.h (struct ref_list_iterator): Declare.
14841
        (FOR_REF_BETWEEN, FOR_EACH_REF, FOR_EACH_REF_REV): Replace with new
14842
        rli_* iterator functions.  Update all users.
14843
 
14844
2002-10-21  Frank Ch. Eigler  
14845
 
14846
        * tree-cfg.c (make_blocks): Ignore TRY_FINALLY_EXPR and
14847
        TRY_CATCH_EXPR.
14848
        * tree-mudflap.c (mx_register_decls): Ignore local decls
14849
        of extern variables of unknown size.
14850
 
14851
2002-10-20  Daniel Berlin  
14852
 
14853
        * tree-ssa-pre.c (repair_injury): DTRT, rather than abort.
14854
 
14855
        * tree-dfa.c (ref_type_name): E_* don't have these modifier
14856
        fields, but may have the same bits set, so don't print the
14857
        modifiers on them.
14858
 
14859
        * gimplify.c (create_tmp_var): New function, wraps calls to
14860
        create_tmp_var_1 with pushing/popping of right context.
14861
        All internal gimplify.c now use create_tmp_var_1.
14862
        (create_tmp_var_noc): New function, create the var without
14863
        pushing/popping, and without exposing internals of create_tmp_var_1.
14864
        Only one use of this.
14865
 
14866
        * tree-simple.h (create_tmp_var_noc): New prototype.
14867
 
14868
        * c-simplify.c (simplify_stmt_expr): create_tmp_var changed to
14869
        create_tmp_var_noc.
14870
 
14871
        * tree-ssa-pre.c: Add WAITING_FOR_DFA_UPDATE around code waiting for DFA
14872
        functions to keep refs up to date.
14873
        (add_call_to_ei): occurs and occurstmts is now an
14874
        array of tree pointers, not trees. Update approriately.
14875
        (insert_occ_in_preorder_dt_order_1): Ditto.
14876
        (tree_perform_ssapre): Ditto.
14877
        (find_use_for_var): Removed function.
14878
        (orig_expr_map): Removed global, removed uses.
14879
        (struct ei): Added injfixups member.
14880
        (is_strred_cand): STRIP_WFL the expression.
14881
        (calculate_increment): Ditto.
14882
        (is_injuring_def): Ditto.
14883
        (defs_y_dom_x): Ditto. Also account for fact that y is now a full
14884
        expression, not just an RHS.
14885
        (defs_match_p): Ditto (t2 is no longer just an RHS).
14886
        (finalize_1): Do insertion by replacement.
14887
        (repair_injury): Clean up, do insertion by replacement.
14888
        (find_reaching_def_of_var): Do backwards search in a cleaner way.
14889
        (update_ssa_for_new_use): Change how we do replacement.
14890
        (code_motion): Insertion by replacement. Print EXPR_WFL_LINENO, not
14891
        STMT_LINENO.
14892
        (pre_part_1_trav): Just create_tmp_var will now suffice.
14893
 
14894
2002-10-18  Diego Novillo  
14895
 
14896
        * tree-dfa.c (find_refs_in_expr): Change type of second argument to
14897
        enum tree_ref_type.  Add third argument ref_mod.  Update all users.
14898
        (create_ref): Add third argument ref_mod.  Decode bitmask to set
14899
        the individual bitfields in the new reference.
14900
        * tree-flow-inline.h (is_may_ref): New function.
14901
        (is_may_def): New function.
14902
        (is_may_use): New function.
14903
        (is_partial_ref): New function.
14904
        (is_partial_def): New function.
14905
        (is_partial_use): New function.
14906
        (is_volatile_ref): New function.
14907
        (is_volatile_def): New function.
14908
        (is_volatile_use): New function.
14909
        (is_default_def): New function.
14910
        (is_clobbering_def): New function.
14911
        (is_initializing_def): New function.
14912
        (is_relocating_def): New function.
14913
        (is_addressof_use): New function.
14914
        (is_pure_use): New function.
14915
        * tree-flow.h (V_DEF, V_USE, V_PHI, E_PHI, E_USE, E_KILL): Redefine
14916
        inside enum tree_ref_type.  Update all users.
14917
        (enum tree_ref_type): Define.
14918
        (TRM_DEFAULT, TRM_CLOBBER, TRM_MAY, TRM_PARTIAL, TRM_INITIAL,
14919
        TRM_VOLATILE, TRM_RELOCATE): Rename from M_*.  Update all users.
14920
        (struct tree_ref_common): Change type of field 'type' to enum
14921
        tree_ref_type.  Update all users.
14922
        (struct var_ref): Add bitfields 'm_may', 'm_partial' and 'm_volatile'.
14923
        (struct var_def): Add bitfield 'm_default', 'm_clobber', 'm_initial'
14924
        and 'm_relocate'.
14925
        (struct var_use): Add bitfield 'm_addressof'.
14926
        (ref_type): Change return type to enum tree_ref_type.  Update all
14927
        users.
14928
        (create_ref): Add new argument ref_mod.  Update all users.
14929
        (function_may_recurse_p): Change return type to bool.  Update all
14930
        users.
14931
        (ref_type_name): Change argument type to tree_ref.  Update all
14932
        users.
14933
        (validate_ref_type): Remove.
14934
 
14935
2002-10-18  Diego Novillo  
14936
 
14937
        * cp/Make-lang.in (CXX_C_OBJS): Remove tree-cfg.o, tree-dfa.o,
14938
        tree-optimize.o, tree-ssa.o, tree-ssa-pre.o, gimplify.o, tree-simple.o,
14939
        tree-alias-steen.o, tree-alias-ecr.o, tree-alias-type.o,
14940
        disjoint-set.o, tree-ssa-ccp.o, tree-dchain.o, tree-alias-common.o,
14941
        and tree-ssa-dce.o.
14942
 
14943
2002-10-17  Diego Novillo  
14944
 
14945
        * Makefile.in (TREE_FLOW_H): Add bitmap.h, basic-block.h,
14946
        hard-reg-set.h and tree-simple.h.  Update all users.
14947
        (C_AND_OBJC_OBJS): Move tree-cfg.o, tree-dfa.o,
14948
        tree-ssa.o, tree-optimize.o, c-simplify.o, c-call-graph.o,
14949
        tree-simple.o, simple-break-elim.o, simple-goto-elim.o, tree-dchain.o,
14950
        tree-ssa-pre.o, tree-alias-type.o, tree-mudflap.o, gimplify.o,
14951
        tree-alias-ecr.o, tree-alias-common.o, tree-alias-steen.o,
14952
        disjoint-set.o, tree-ssa-ccp.o and tree-ssa-dce.o ...
14953
        (OBJS): ... here.
14954
        (gimplify.o): Add dependency on $(TREE_FLOW_H).
14955
        (tree-pretty-print.o): New rule.
14956
        (GTFILES): Add tree-flow.h
14957
        * c-config-lang.in (gtfiles): Remove tree-flow.h
14958
        * c-simplify.c (copy_if_shared_r, unmark_visited_r,
14959
        unshare_all_trees, mark_not_simple): Move ...
14960
        * gimplify.c: ... here.
14961
        Include tree-flow.h
14962
        * tree-flow.h: Include hard-reg-set.h.
14963
 
14964
        * c-common.h (print_c_tree, print_c_node, print_c_node_brief,
14965
        debug_c_tree, debug_c_node, debug_c_node_brief): Move declarations
14966
        from diagnostic.h.
14967
        * c-call-graph.c (construct_call_graph): Call get_name.
14968
        (print_callee): Likewise.
14969
        * c-pretty-print.c (print_declaration): Declare static.
14970
        (print_function_decl): Likewise.
14971
        (print_struct_decl): Likewise.
14972
        (dump_c_tree): Likewise.
14973
        (dump_c_node): Likewise.
14974
        * diagnostic.h (dump_generic_tree, dump_generic_node,
14975
        print_generic_tree, print_generic_node, print_generic_node_brief):
14976
        Declare.
14977
        * tree-pretty-print.c: New file.
14978
        * c-decl.c: Replace calls to print_c_node with print_generic_node.
14979
        * tree-alias-common.c: Likewise.
14980
        * tree-alias-steen.c: Likewise.
14981
        * tree-cfg.c: Likewise.
14982
        * tree-dfa.c: Likewise.
14983
        * tree-mudflap.c: Likewise.
14984
        * tree-optimize.c: Likewise.
14985
        * tree-ssa-ccp.c: Likewise.
14986
        * tree-ssa-pre.c: Likewise.
14987
        * tree-ssa-dce.c: Likewise.
14988
        Don't include c-common.h nor c-tree.h
14989
        (tree_ssa_eliminate_dead_code): Don't call COMPOUND_BODY.
14990
        Replace ASM_STMT with ASM_EXPR.  Don't check for EXPR_STMT.
14991
 
14992
2002-10-17  Daniel Berlin  
14993
            Diego Novillo  
14994
 
14995
        * tree-cfg.c (remove_bb_ann): Remove.  Update all users.
14996
        (delete_tree_cfg): Set bb->aux to NULL in all basic blocks.
14997
        * tree-dfa.c: Remove extern declaration for tree_find_refs.
14998
        (create_ref_list): Allocate new list with ggc_alloc.
14999
        (empty_ref_list): Just set first and last element to NULL.
15000
        (delete_ref_list): Remove.  Update all users.
15001
        (remove_ref_from_list): Don't call free.
15002
        (add_ref_to_list_begin): Allocate new node with ggc_alloc.
15003
        (add_ref_to_list_end): Likewise.
15004
        (add_ref_to_list_after): Likewise.
15005
        (create_ref): Call BITMAP_GGC_ALLOC.
15006
        (remove_tree_ann): Remove.  Update all users.
15007
        (tree_ref_structure): New function.
15008
        * tree-flow.h (edge, basic_block): Forward declare if necessary.
15009
        (struct ref_list_node): Mark for garbage collection.
15010
        (struct ref_list_priv): Likewise.
15011
        (struct tree_ref_common): Likewise.
15012
        (struct var_ref): Likewise.
15013
        (struct var_def): Likewise.
15014
        (struct var_phi): Likewise.
15015
        (struct var_use): Likewise.
15016
        (struct phi_node_arg_d): Likewise.
15017
        (struct expr_ref_common): Likewise.
15018
        (struct expr_phi): Likewise.
15019
        (struct expr_use): Likewise.
15020
        (union tree_ref_d): Likewise.
15021
        (struct tree_ann_d): Likewise.
15022
        (struct bb_ann_def): Likewise.
15023
        (referenced_vars): Likewise.
15024
        (global_var): Likewise.
15025
        (enum tree_ref_structure_enum): New.
15026
        (call_sites): Remove unused function.
15027
        * tree-inline.c (copy_tree_r): Copy the 'ann' field from tree_common.
15028
        * old-tree-inline.c (copy_tree_r): Likewise.
15029
        * tree-ssa.c (added): Mark for garbage collection.
15030
        (in_work): Likewise.
15031
        (work_stack): Likewise.
15032
        (delete_tree_ssa): Set global_var to NULL_TREE.
15033
        * tree.h (struct tree_ann_d): Forward declare.
15034
        (struct tree_common): Rename field 'aux' to 'ann'.  Update all
15035
        users.  Don't mark it 'skip' for garbage collection.
15036
 
15037
2002-10-16  Daniel Berlin  
15038
 
15039
        * tree-dfa.c (compute_may_aliases): Call create/delete_alias_vars
15040
        if flag_tree_points_to is on.
15041
        (may_alias_p): Use points-to info if user asked us to generate it.
15042
 
15043
        * tree-optimize.c (optimize_function_tree): Don't call
15044
        create_alias_vars here.
15045
 
15046
2002-10-16  Diego Novillo  
15047
 
15048
        * tree-cfg.c (make_cond_expr_edges): If the conditional has known
15049
        value, only make the edge to the corresponding branch.
15050
        (tree_delete_bb): Write a warning to the dump file when removing
15051
        blocks with executable statements.
15052
        (first_exec_stmt): Skip over empty BIND_EXPR blocks.
15053
 
15054
        * tree-dfa.c (find_refs_in_expr): Don't look for references in non
15055
        GIMPLE statements.
15056
        (remove_tree_ann): Clear the annotation with memset.
15057
        (collect_dfa_stats_r): Don't call tree_annotation.
15058
        (find_may_aliases_for): Avoid adding the same alias more than once.
15059
        (may_alias_p): Fix comment grammar.
15060
 
15061
        * tree-flow-inline.h (is_exec_stmt): New function.
15062
        * tree-flow.h (FOR_EACH_REF): Guard against NULL lists.
15063
        (FOR_EACH_REF_REV): Likewise.
15064
        (is_exec_stmt): Declare.
15065
 
15066
        * tree-ssa-ccp.c (visit_phi_node): Reformat debug dumping output.
15067
        (visit_expression_for): Move check for clobbering definitions
15068
        before check for NULL expressions.
15069
        (visit_condexpr_for): Reformat debug dumping output.
15070
        (set_lattice_value): Remove stale comments.
15071
        (replace_uses_in): Don't clear TF_FOLDED flag from expression.
15072
 
15073
        * tree-ssa.c (add_phi_node): If possible, associate the PHI node to
15074
        a statement.
15075
        (create_default_def): Create initial declarations for static
15076
        variables with DECL_INITIAL set.
15077
        (delete_tree_ssa): Remove annotations from variables.
15078
 
15079
2002-10-16  Daniel Berlin  
15080
 
15081
        * tree-alias-type.c (alias_tvar_new_with_aterm): New function.
15082
        Update all allocations to allocate right type, rather than the union.
15083
        Update to use macros to access members of alias_typevar.
15084
 
15085
        * tree-alias-type.h: Split alias_typevar into a common, an ECR, and
15086
        an aterm, update all users.
15087
        Add macros to access members of union.
15088
 
15089
        * tree-alias-common.c (create_alias_var): Handle function_decl's
15090
        properly (needed for proper handling of function pointers).
15091
        Updates for macros to access typevars.
15092
        Fix some indentation.
15093
 
15094
        * tree-alias-steen.c: Updates for macros to access typevars.
15095
 
15096
2002-10-16  Frank Ch. Eigler  
15097
 
15098
        * c-decl.c (c_expand_body): Enable mudflap, only for gimple.
15099
        * c-pretty-print.c (dump_c_node): Render try/catch/finally exprs.
15100
        (op_prio): Accept BIND_EXPRs.
15101
        * gcc.c (cpp_unique_options): Make -fmudflap -include mf-runtime.h.
15102
        * toplev.c (process_options): Complain on -fmudflap -fdisable-simple.
15103
        * tree-mudflap.c (*): Reorganize for generic/gimple operation.
15104
        (mf_init_extern_trees): Extract decl nodes from -include'd file.
15105
        (mf_external_ref, mf_decl_extern_trees): Removed; updated callers.
15106
        (mf_offset_expr_of_array_ref): Don't bother store index type as
15107
        TREE_PURPOSE.
15108
        (mf_build_check_statement_for): Use GIMPLE tree types and builders.
15109
        (mx_register_decls): New function, replacing mx_register_decl.
15110
        (mx_xfn_xform_decls): Support only GIMPLE input tree types.
15111
        (mf_flush_enqueued_calls): Clean up enqueued call statements.
15112
 
15113
2002-10-14  Diego Novillo  
15114
 
15115
        * toplev.c (parse_options_and_default_flags): Undo local
15116
        hack that slipped in the previous commit.
15117
 
15118
2002-10-14  Diego Novillo  
15119
 
15120
        * Makefile.in (c-decl.o): Add dependency on diagnostic.h.
15121
        * c-decl.c: Include diagnostic.h
15122
        (c_expand_body): Call get_name.
15123
 
15124
        * basic-block.h (struct basic_block_def): Rename head_tree to
15125
        head_tree_p and end_tree to end_tree_p.  Change type to tree *.
15126
        Update all users.
15127
        (BLOCK_HEAD_TREE): Remove.  Update all users.
15128
        (BLOCK_END_TREE): Remove.  Update all users.
15129
        * tree-cfg.c (build_tree_cfg): Return if function body is empty.
15130
        (make_blocks): Change first argument to tree *.  Update all users.
15131
        (make_bind_expr_blocks): Likewise.
15132
        (make_loop_expr_blocks): Likewise.
15133
        (make_cond_expr_blocks): Likewise.
15134
        (make_switch_expr_blocks): Likewise.
15135
        (create_bb): Likewise.
15136
        (first_exec_block): Likewise.
15137
        (first_exec_stmt): Likewise.
15138
        (tree_delete_bb): Use a gimple statement iterator to unmap
15139
        statements.
15140
        (insert_stmt_before): Remove empty function.
15141
        (replace_expr_in_tree): Remove.  Update all users.
15142
        (find_expr_in_tree_helper): Likewise.
15143
        (find_expr_in_tree): Likewise.
15144
        (first_stmt): Call STRIP_NOPS.
15145
        (last_stmt): Call STRIP_NOPS.
15146
 
15147
        * tree-dfa.c (struct clobber_data_d): Rename parent_stmt to
15148
        parent_stmt_p and parent_expr to parent_expr_p.  Change types to
15149
        tree *.  Update all users.
15150
        (find_refs_in_stmt): Change first argument type to tree *.  Update
15151
        all users.
15152
        (find_refs_in_expr): Chnage arguments parent_stmt and parent_expr
15153
        to tree *.  Update all users.
15154
        (create_ref): Don't add the same reference twice on the same list
15155
        when parent_stmt and parent_expr are the same node.
15156
        Don't set output_ref when the parent statement is not in GIMPLE
15157
        form.
15158
        (replace_ref_operand_with): Move from tree-flow-inline.h
15159
        (replace_ref_expr_with): New function.
15160
        (replace_ref_stmt_with): New function.
15161
        (create_tree_ann): Abort if trying to annotate certain nodes.
15162
        Don't create an empty ref list.
15163
        In the presence of WFL or NOPS wrappers, add the annotation to the
15164
        inner node.
15165
        (dump_ref): Don't call tree_annotation to access the tree
15166
        annotation.
15167
 
15168
        * tree-flow.h (struct tree_ref_common): Rename field stmt to stmt_p
15169
        and field expr to expr_p.  Change types to tree *.  Update all
15170
        users.
15171
        (replace_ref_expr_with): Declare.
15172
        (replace_ref_stmt_with): Declare.
15173
        (insert_stmt_before, insert_stmt_after, replace_expr_in_tree,
15174
        find_expr_in_tree): Remove.
15175
        * tree-flow-inline.h (ref_expr): Return NULL_TREE if expr_p is
15176
        NULL.
15177
        (ref_stmt): Return NULL_TREE if stmt_p is NULL.
15178
        (tree_annotation): Call STRIP_WFL and STRIP_NOPS before returning
15179
        the annotation.
15180
        (add_tree_ref): Remove consistency checks.  Create an empty list
15181
        the first time.
15182
        (get_lineno): Return -1 on NULL_TREE.
15183
        (set_output_ref): Remove consistency.
15184
        (set_tree_flag): Likewise.
15185
        (clear_tree_flag): Likewise.
15186
        (reset_tree_flags): Likewise.
15187
        * tree-simple.h (gimple_stmt_iterator): Rename ptr to tp.  Change
15188
        type to tree *.  Update all users.
15189
        (gsi_start): Change argument type to tree *.  Update all users.
15190
        (gsi_stmt_ptr): New function.
15191
        (gsi_container): New function.
15192
 
15193
        * tree-optimize.c (optimize_function_tree): Don't test fnbody for
15194
        NULL.
15195
        Re-enable optimizers.
15196
        * tree-ssa-ccp.c: Update documentation comments.
15197
        Don't include c-common.h and c-tree.h.
15198
        (tree_ssa_ccp): Don't call COMPOUND_BODY.
15199
        (ccp_fold): New private function.
15200
        (substitute_and_fold): Call it.
15201
        Call replace_ref_expr_with.
15202
        Set TF_FOLDED flag on the statement, not the expression.
15203
        (visit_assignment_for): Call STRIP_NOPS and STRIP_WFL.
15204
        (evaluate_expr): Call ccp_fold.  Only use the RHS of the simplified
15205
        value in the case of MODIFY_EXPR or INIT_EXPR.
15206
        (restore_expr):
15207
        * tree-ssa-dce.c (mark_control_parent_necessary): Use a gimple
15208
        iterator.
15209
        (tree_ssa_eliminate_dead_code): Likewise.
15210
        * tree-ssa-pre.c: Disable and add warning comments for out-of-date
15211
        calls to create_ref, find_refs_in_stmt and replace_expr_in_tree.
15212
 
15213
2002-10-12  Daniel Berlin  
15214
 
15215
        * tree-alias-type.h  (alias_typevar_def): Add struct aterm
15216
        as a temporary hack for andersen's analysis.
15217
        * tree-alias-common.c (current_alias_ops): New, use it
15218
        instead of referring to steen_alias_ops everywhere.
15219
        (get_alias_var): Use STRIP_WFL.
15220
        (find_func_aliases): Ditto.
15221
        (create_alias_vars): Call init function, move deletion to
15222
        delete_alias_vars.
15223
        (delete_alias_vars): New function, move deletion code to here.
15224
        (get_virtual_var): Removed.
15225
        (ptr_may_alias_var): New function.
15226
        * tree-alias-common.h (struct tree_alias_ops): Add may_alias
15227
        function.
15228
        * tree-alias-steen.c (steen_may_alias): New function.
15229
 
15230
2002-10-10  Falk Hueffner  
15231
 
15232
        * diagnostic.h (dump_c_tree, dump_c_node,
15233
        print_declaration, print_function_decl,
15234
        print_struct_decl): Fix argument types.
15235
 
15236
2002-10-10  Diego Novillo  
15237
 
15238
        * tree.h (struct tree_common): Rename field unused_0 to
15239
        not_gimple_flag.
15240
        (TREE_NOT_GIMPLE): Define.
15241
        * c-simplify.c (mark_not_simple_r): Remove.  Update all users.
15242
        (mark_not_simple): Set TREE_NOT_GIMPLE.
15243
        * gimplify.c (simplify_call_expr): Enable call to mark_not_simple.
15244
        * tree-flow.h (TF_NOT_SIMPLE): Remove.  Update all users.
15245
 
15246
        * tree-cfg.c (build_tree_cfg): Rename from tree_find_basic_blocks.
15247
        Update all users.
15248
        Find the first executable statement before starting basic block 0.
15249
        (make_blocks): Do not accept TRY_FINALLY_EXPR and TRY_CATCH_EXPR
15250
        nodes.
15251
        (make_edges): Always create an edge from entry to basic block 0.
15252
        (delete_tree_cfg): Rename from delete_cfg.  Update all uses.
15253
        (first_exec_stmt): Return the container for the first statement,
15254
        not the statement itself.
15255
 
15256
        * tree-dfa.c (tree_find_refs): Re-implement using a GIMPLE
15257
        iterator.
15258
        (find_refs_in_stmt): Handle GIMPLE statements.
15259
        (find_refs_in_expr): Call flags_from_decl_or_type when handling
15260
        CALL_EXPR expressions.
15261
        (create_ref): Call DECL_P.
15262
        (remove_tree_ann): Call tree_annotation.
15263
 
15264
        * tree-flow-inline.h (gsi_step_bb): Stop if statement is not inside
15265
        a basic block.
15266
 
15267
        * tree-flow.h (build_tree_cfg): Rename from tree_find_basic_blocks.
15268
        Update all users.
15269
        (delete_tree_cfg): Rename from delete_cfg.
15270
        (tree_find_refs): Declare.
15271
        (build_tree_ssa): Rename from tree_build_ssa.
15272
        (is_upward_exposed): Remove unused function.
15273
        * tree-optimize.c (delete_tree_ssa): Remove declaration.
15274
        (optimize_function_tree): Re-enable SSA builder.
15275
        * tree-simple.h (gsi_container): New function.
15276
 
15277
        * Makefile.in (tree-ssa.o): Remove dependencies on c-common.h and
15278
        c-tree.h.
15279
        * tree-ssa.c: Don't include c-common.h nor c-tree.h.
15280
        (tree_find_refs): Remove declaration.
15281
        (remove_annotations_r): New local function.
15282
        (build_tree_ssa): Rename from tree_build_ssa.  Update all users.
15283
        (analyze_rdefs): Don't call prep_stmt.
15284
        (is_upward_exposed): Remove unused function.
15285
        (add_phi_node): Don't associate the PHI node to a statement.
15286
        (delete_tree_ssa): Receive the function body as argument.
15287
        Walk the function body removing annotations from every tree.
15288
 
15289
2002-10-10  Steven Bosscher  
15290
 
15291
        * tree-ssa-dce (tree_ssa_eliminate_dead_code): Initialize prev to
15292
        NULL_TREE.
15293
        Don't close dump_file until end of function.
15294
        Dump the tree after DCE for -fdump-tree-dce.
15295
 
15296
2002-10-08  Richard Henderson  
15297
            Jason Merrill  
15298
            Diego Novillo  
15299
 
15300
        * tree-simple.h (gimple_stmt_iterator): New type.
15301
        (gsi_start): New function.
15302
        (gsi_after_end): New function.
15303
        (gsi_step): New function.
15304
        (gsi_stmt): New function.
15305
 
15306
2002-10-08  Diego Novillo  
15307
 
15308
        * calls.c (flags_from_decl_or_type): Make extern.
15309
        (ECF_*): Move ...
15310
        * rtl.h (ECF_*): ... here.
15311
        (flags_from_decl_or_type): Declare.
15312
 
15313
        * tree.h (COND_EXPR_COND): Define.
15314
        (COND_EXPR_THEN): Define.
15315
        (COND_EXPR_ELSE): Define.
15316
        (LABEL_EXPR_LABEL): Define.
15317
        (optimize_function_tree): Declare.
15318
 
15319
2002-10-08  Diego Novillo  
15320
 
15321
        * Makefile.in (TREE_FLOW_H): Define.
15322
        (c-decl.o): Remove dependency on tree-optimize.h.
15323
        (tree-alias-steen.o, tree-alias-common.o, tree-ssa.o, tree-ssa-pre.o,
15324
         tree-cfg.o, tree-dfa.o, tree-optimize.o, c-simplify.o, c-call-graph.o,
15325
         tree-ssa-dce.o, tree-ssa-ccp.o): Depend on $(TREE_FLOW_H).
15326
        (tree-cfg.o): Remove dependencies on c-tree.h and c-common.h.
15327
        * c-call-graph.c (construct_call_graph): Disable calls to removed
15328
        functions.
15329
        * c-decl.c: Don't include tree-optimize.h.
15330
        (c_expand_body): Enable calls to optimize_function_tree.
15331
 
15332
        * c-pretty-print.c (dump_c_node): Fix printf warnings.
15333
        Only dump the first node of a COMPOUND_EXPR when brief_dump is set.
15334
        Use COND_EXPR_COND, COND_EXPR_THEN and COND_EXPR_ELSE accessors.
15335
        Only dump the opening brace of a BIND_EXPR when brief_dump is set.
15336
 
15337
        * tree-cfg.c: Don't include tree-optimize.h, c-common.h and c-tree.h.
15338
        (binding_stack, make_for_stmt_blocks, make_if_stmt_blocks,
15339
         make_while_stmt_blocks, make_switch_stmt_blocks,
15340
         make_do_stmt_blocks, create_maximal_bb, make_for_stmt_edges,
15341
         make_while_stmt_edges, make_do_stmt_edges, make_if_stmt_edges,
15342
         make_break_stmt_edges, make_continue_stmt_edges, create_loop_hdr,
15343
         insert_before_ctrl_stmt, insert_before_normal_stmt,
15344
         insert_after_ctrl_stmt, insert_after_normal_stmt,
15345
         insert_after_loop_body, tree_split_bb, stmt_ends_bb_p): Remove.
15346
        Update all users.
15347
        (STRIP_CONTAINERS): Define.
15348
        (make_bind_expr_blocks): New local function.
15349
        (make_cond_expr_blocks): New local function.
15350
        (make_loop_expr_blocks): New local function.
15351
        (make_switch_expr_blocks): New local function.
15352
        (make_loop_expr_edges): New local function.
15353
        (make_cond_expr_edges): New local function.
15354
        (make_case_label_edges): New local function.
15355
        (first_exec_block): New local function.
15356
        (make_goto_expr_edges): Rename from make_goto_stmt_edges.
15357
        (make_blocks): Remove arguments COMPOUND_STMT and PREV_CHAIN_P.
15358
        Use gimple_stmt_iterator to iterate over the statements in the
15359
        function.  Create maximal basic blocks during traversal.
15360
        (create_bb): Remove arguments end, prev_chain_p and binding_scope.
15361
        Rename control_parent to parent_block.
15362
        (set_bb_for_stmt): Move from tree-flow.h.
15363
        (make_edges): Don't assume that basic block 0 contains executable
15364
        statements.
15365
        Handle BIND_EXPR nodes.
15366
        (make_ctrl_stmt_edges): Handle LOOP_EXPR, COND_EXPR and
15367
        SWITCH_EXPR.
15368
        (make_exit_edges): Handle GOTO_EXPR, CALL_EXPR and RETURN_EXPR.
15369
        (tree_delete_bb): Call first_stmt and last_stmt.
15370
        (block_invalidates_loop): Call last_stmt.
15371
        (replace_expr_in_tree): Don't dump line number information.
15372
        (find_expr_in_tree_helper): Don't call statement_code_p.
15373
        (tree_dump_bb): Call get_lineno.
15374
        (tree_cfg2dot): Ditto.
15375
        (successor_block): Use a gimple_stmt_iterator to find the first
15376
        executable block after the current one.
15377
        (is_ctrl_stmt): Handle COND_EXPR, LOOP_EXPR and SWITCH_EXPR.
15378
        (is_ctrl_altering_stmt): Call flags_from_decl_or_type to discover
15379
        non-return functions.
15380
        (is_loop_stmt): Handle LOOP_EXPR.
15381
        (is_computed_goto): Handle GOTO_EXPR.
15382
        (stmt_starts_bb_p): Handle CASE_LABEL_EXPR, LABEL_EXPR, RETURN_EXPR
15383
        and BIND_EXPR.
15384
        (first_exec_stmt): Use a gimple_stmt_iterator to traverse the
15385
        statements.
15386
        (first_stmt): New function.
15387
        (last_stmt): New function.
15388
 
15389
        * tree-dfa.c: Don't include c-common.h, c-tree.h and
15390
        tree-optimize.h.  Include diagnostic.h.
15391
        (tree_find_refs): Disable.
15392
        (find_refs_in_stmt): Disable.
15393
        (find_refs_in_expr): Don't call prep_stmt.
15394
        (tree_ann): Don't annotate empty_stmt_node.
15395
        (find_declaration): Remove.  Update all users.
15396
        (dump_ref): Call get_lineno.
15397
        (is_visible_to): Always return true.
15398
 
15399
        * tree-flow.h: Include tree-flow-inline.h, basic-block.h and
15400
        tree-simple.h.
15401
        (tree_ann_d): Remove compound_parent field.
15402
        (set_bb_for_stmt): Declare extern.
15403
        (compound_parent, set_compound_parent, struct for_header_blocks,
15404
        union header_blocks, prev_chain_p, set_prev_chain_p, binding_scope,
15405
        set_binding_scope, loop_hdr, for_init_bb, set_for_init_bb,
15406
        for_cond_bb, set_for_cond_bb, for_expr_bb, set_for_expr_bb,
15407
        end_while_bb, set_end_while_bb, do_cond_bb, set_cond_bb,
15408
        stmt_ends_bb_p, loop_parent, latch_block, switch_parent,
15409
        first_exec_stmt, last_exec_stmt, is_exec_stmt,
15410
        is_statement_expression, first_non_decl_stmt, first_decl_stmt,
15411
        first_non_label_in_bb, tree_split_bb, find_declaration): Remove.
15412
        Update all users.
15413
        (get_lineno): New function.
15414
        (struct bb_ann_def): Rename field parent to parent_block.  Update
15415
        all users.
15416
        Remove fields prev_chain_p, loop_hdr and binding_scope.  Update all
15417
        users.
15418
        (parent_block): Rename from bb_parent.
15419
        (set_parent_block): Rename from set_bb_parent.
15420
        (prev_chain_p): Remove
15421
        (bb_empty_p): Return true if block only contains empty_stmt_node.
15422
        (gsi_step_bb): New function.
15423
        (gsi_start_bb): New function.
15424
        (gsi_insert_before, gsi_insert_after, gsi_delete, gsi_replace):
15425
        Declare.
15426
        (insert_stmt_before): Rename from insert_stmt_tree_before.
15427
        (insert_stmt_after): Rename from insert_stmt_tree_after.
15428
        (first_stmt): Declare.
15429
        (last_stmt): Declare.
15430
        (tree_perform_ssapre, tree_ssa_ccp,
15431
        tree_ssa_eliminate_dead_code): Move declaration from tree-optimize.h.
15432
        * tree-flow-inline.h: New file for all the inline functions
15433
        declared in tree-flow.h
15434
 
15435
        * tree-optimize.c: Don't include tree-optimize.h, c-common.h and
15436
        c-tree.h.
15437
        (optimize_function_tree): Disable call to double_chain_stmts.
15438
        Call init_flow.
15439
        Call tree_find_basic_blocks.
15440
        Disable calls to tree_build_ssa and optimizers.
15441
        (build_tree_ssa): Remove.  Update all users.
15442
        * tree-optimize.h: Remove.
15443
        * tree-ssa-ccp.c: Don't include tree-optimize.h
15444
        * tree-ssa-dce.c: Don't include tree-optimize.h.
15445
        Include diagnostic.h
15446
        * tree-ssa-pre.c: Don't include tree-optimize.h.
15447
        (requires_edge_placement): Disable unused function.
15448
        (set_need_repair): Disable unused function.
15449
        (finalize_1): Disable calls to insert_stmt_tree_before and
15450
        insert_stmt_tree_after.
15451
        (repair_injury): Ditto.
15452
        (code_motion): Ditto.
15453
        * tree-ssa.c: Don't include tree-optimize.h.
15454
        (insert_phi_nodes_for): Remove unused variable.
15455
        (add_phi_node): Don't call statement_code_p.
15456
        * cp/optimize.c: Don't include tree-optimize.h
15457
        * tree-alias-common.c: Don't include tree-optimize.h.
15458
        (find_func_decls): Disable.
15459
        (display_points_to_set): Disable.
15460
        * tree-alias-steen.c: Don't include tree-optimize.h.
15461
 
15462
2002-10-04  Jason Merrill  
15463
 
15464
        * gimplify.c (declare_tmp_vars): Don't add temps to block vars.
15465
        * tree-inline.c (remap_decls): Split out from remap_block.
15466
        (copy_bind_expr): Remap BIND_EXPR_VARS separately from block vars.
15467
 
15468
        * c-simplify.c (simplify_expr_stmt): Call set_file_and_line_for_stmt.
15469
 
15470
        * gimplify.c: New file.
15471
        (push_gimplify_context, pop_gimplify_context): New fns.
15472
        (gimple_push_bind_expr, gimple_pop_bind_expr): New fns.
15473
        (simplify_bind_expr): Use them.
15474
        (gimple_current_bind_expr, gimple_add_tmp_var): New fn.
15475
        (foreach_stmt): Recurse if necessary.
15476
        (various): Use generic interfaces instead of c-specific ones.
15477
        * c-simplify.c: Move language-independent code to gimplify.c.
15478
        (simplify_c_loop): Use add_tree instead of add_stmt_to_compound.
15479
        (various): Use new *_bind_expr interfaces.
15480
        * Makefile.in (C_AND_OBJC_OBJS): Add gimplify.o.
15481
        (gimplify.o): New rule.
15482
 
15483
        * c-decl.c (c_expand_body): Dump trees here.
15484
        * c-simplify.c (simplify_function_body): Not here.
15485
 
15486
2002-10-03  Frank Ch. Eigler  
15487
 
15488
        * tree-mudflap.c (mf_offset_expr_of_array_ref): Don't emit
15489
        intermediate variables for constant index values.
15490
        (mx_xfn_indirect_ref): For constant valid index values and
15491
        known valid array sizes, omit bounds checks.
15492
 
15493
2002-10-03  Jason Merrill  
15494
 
15495
        * c-simplify.c (simplify_bind_expr): Don't clear TREE_SIDE_EFFECTS
15496
        if we have a block.
15497
 
15498
        * c-simplify.c (simplify_expr) [TRY_FINALLY_EXPR]: New case.
15499
 
15500
        * tree-inline.c (copy_body_r) [RETURN_EXPR]: Don't make an extra
15501
        copy of the MODIFY_EXPR.  Mark the return label used.
15502
        (expand_call_inline): Don't push/pop_srcloc.  Only emit the return
15503
        label if it was used.
15504
 
15505
        * tree-simple.c (right_assocify_expr): Split out from
15506
        rationalize_compound_expr.  Don't move non-matching op0's.
15507
        * tree-simple.h: Declare it.
15508
        * c-simplify.c (simplify_boolean_expr): Call it.
15509
        (simplify_cond_expr): Reorganize.  Optimize if (a&&b).
15510
 
15511
        * c-simplify.c (wrap_with_wfl): Drop special loop handling.
15512
        (simplify_c_loop): Wrap loop contents in wfls.
15513
 
15514
        * c-simplify.c (STRIP_WFL): Move...
15515
        * tree.h: ...here.
15516
 
15517
        * c-common.c (c_walk_subtrees): Don't walk TREE_CHAIN.
15518
        * tree-inline.c (walk_tree): Call langhook walk_subtrees first.
15519
        For expressions, walk TREE_CHAIN if it matters.
15520
 
15521
2002-10-01  Frank Ch. Eigler  
15522
 
15523
        * builtins.c (expand_builtin_alloca): Disable if -fmudflap.
15524
        * tree-mudflap.c (mudflap_enqueue_decl): Tweak logic to include
15525
        more globals.
15526
        (mx_xfn_indirect_ref): Handle bitfield COMPONENT_REFs; instrument
15527
        BIT_FIELD_REF/INDIRECT_REFs.
15528
 
15529
2002-10-01  Jason Merrill  
15530
 
15531
        * c-decl.c (poplevel): Only add undeclared labels to the toplevel
15532
        block.
15533
        * c-parse.in (label_decl): Push the declared label.
15534
 
15535
        * c-decl.c (c_expand_body): If we've been simplified, use
15536
        expand_expr_stmt_value instead.
15537
 
15538
        * c-decl.c (c_expand_decl): Rename from c_expand_decl_stmt.
15539
        Handle all C-specific expansion semantics.
15540
        * c-tree.h: Change prototype.
15541
        * langhooks.h (struct lang_hooks): Add expand_decl hook.
15542
        * langhooks.c (lhd_expand_decl): Default version.
15543
        * langhooks-def.h (LANG_HOOKS_EXPAND_DECL): Provide default.
15544
        * c-lang.c (LANG_HOOKS_EXPAND_DECL): Define.
15545
        * c-semantics.c (lang_expand_decl_stmt): Remove.
15546
        (genrtl_decl_stmt): Use lang_hooks.expand_decl.
15547
        * Makefile.in (c-semantics.o): Depend on langhooks.h.
15548
        * c-objc-common.c (c_objc_common_init): Don't set
15549
        lang_expand_decl_stmt.
15550
 
15551
        * c-common.def (ASM_STMT): Only 4 operands.
15552
        * c-common.h (ASM_CV_QUAL): Remove.
15553
        (genrtl_asm_stmt): Adjust prototype.
15554
        * c-typeck.c (build_asm_stmt): Adjust.
15555
        * c-semantics.c (genrtl_asm_stmt): Change cv_qualifier parm to
15556
        volatile_p.
15557
        (expand_stmt): Adjust.
15558
 
15559
        * c-common.h (SWITCH_COND, SWITCH_BODY, CASE_LOW, CASE_HIGH,
15560
        CASE_LABEL_DECL, GOTO_DESTINATION, ASM_STRING, ASM_OUTPUTS,
15561
        ASM_INPUTS, ASM_CLOBBERS, ASM_VOLATILE_P, ASM_INPUT_P): Move to tree.h.
15562
 
15563
        * c-pretty-print.c (newline_and_indent): New fn.
15564
        (dump_c_tree, dump_c_node): Make spc a plain int.
15565
        (dump_c_node): Use output_add_identifier.
15566
        Reorganize for bnw-simple; indent in the enclosing node rather
15567
        than the subexpression.
15568
        [FUNCTION_DECL]: Just print the name for now.
15569
        [COMPOUND_EXPR, COND_EXPR]: Handle use as statements.
15570
        [BIND_EXPR, GOTO_EXPR, EXIT_EXPR, LOOP_EXPR, LABELED_BLOCK_EXPR,
15571
        EXIT_BLOCK_EXPR, RETURN_EXPR, SWITCH_EXPR, ASM_EXPR,
15572
        CASE_LABEL_EXPR]: Implement.
15573
        (print_declaration): Print 'static'.
15574
        * c-tree.h: Move c-pretty-print decls to diagnostic.h.
15575
 
15576
        * expr.c (store_field): Don't always pass want_value==0 to store_expr.
15577
 
15578
        * expr.c (expand_expr) [EXIT_EXPR]: Handle EXIT_EXPR_IS_LOOP_COND.
15579
 
15580
        * expr.c (expand_expr) [LOOP_EXPR]: Pass exit_flag==0 to
15581
        exand_start_loop.
15582
        [BIND_EXPR]: Adjust for functions-as-trees mode.
15583
        [COMPOUND_EXPR]: Avoid recursion if possible.
15584
        [SWITCH_EXPR, LABEL_EXPR]: Move handling from java/expr.c.
15585
        [CASE_LABEL_EXPR, ASM_EXPR]: New handling.
15586
 
15587
        * tree.h (struct tree_common): Add visited flag.
15588
        (TREE_VISITED): New macro.
15589
        * tree.c (copy_node): Clear TREE_VISITED.
15590
        * print-tree.c (print_node): Print visted.
15591
 
15592
        * stmt.c (expand_asm_expr): New fn.
15593
 
15594
        * tree.c (build1): Always set TREE_SIDE_EFFECTS for 's' codes.
15595
 
15596
        * tree.h (enum tree_index): Add TI_EMPTY_STMT.
15597
        (empty_stmt_node): New macro.
15598
        * tree.c (build_common_tree_nodes_2): Initialize it.
15599
 
15600
        * tree.def: Change some codes from 'e' to 's'.
15601
        (CASE_LABEL_EXPR, ASM_EXPR): New codes.
15602
 
15603
        * tree.def (SWITCH_EXPR): Now has three operands.
15604
 
15605
        * tree-inline.c: Retarget to generic trees.  FIXME FIXME.
15606
        * old-tree-inline.c: Old C/Java-specific inliner.
15607
        * Makefile.in (old-tree-inline.o): New rule.
15608
        * c-common.c (c_walk_subtrees): New fn.
15609
        (c_tree_chain_matters_p): New fn.
15610
        * c-lang.c: Use them for LANG_HOOKS_TREE_INLINING_WALK_SUBTREES
15611
        and LANG_HOOKS_TREE_INLINING_TREE_CHAIN_MATTERS_P.
15612
        * c-common.h: Declare them.
15613
        (DECL_NUM_STMTS): Move to tree.h.
15614
        * c-decl.c (finish_function): Simplify the function trees.
15615
        * c-objc-common.c (inline_forbidden_p): Look inside BIND_EXPRs
15616
        for nested functions.  Don't inline a function with _STMT trees.
15617
 
15618
        * basic-block.h: Include hard-reg-set.h.
15619
 
15620
        * c-decl.c (start_function): Don't call make_decl_rtl.
15621
        (c_expand_body): Call it here instead.
15622
 
15623
        * Makefile.in (explow.o): Depend on langhooks.h.
15624
 
15625
        * unroll.c (copy_loop_body): Don't copy NOTE_INSN_DELETED_LABELs
15626
        between copy_notes_from and loop_end, either.
15627
 
15628
2002-09-30  Daniel Berlin  
15629
 
15630
        * tree-ssa-pre.c (repair_injury): Start work on updating SSA
15631
        representation for strength reduction injuries.
15632
        Print a new line after outputting tree node in debug statements.
15633
        Fix strength reduction of a candidate with two variables (IE a *
15634
        c).
15635
        Put the repair after the injuring statement, not at the end of the
15636
        block.
15637
        Break the RHS use lookup if it's defined by a phi.
15638
        (calculate_increment): Ditto on node printing.
15639
        (code_motion): Ditto on updating SSA rep for strength reduction
15640
        injuries.
15641
        (find_rhs_use_for_var): Rewrite to use maybe_find_rhs_use_for_var.
15642
        (maybe_find_rhs_use_for_var): Rename from find_rhs_use_for_var,
15643
        don't abort, return NULL.
15644
        (set_var_phis): Simplify break condition.
15645
        Make sure RHS *has* a use before we go and get it.
15646
        (rename2): Ditto on RHS checking.
15647
        When looking up injuring defs, break on phis.
15648
        (phi_opnd_from_res): Ditto.
15649
        (defs_y_dom_x): Ditto.
15650
        (TODO List): Add new TODO to fix the remapping crud.
15651
 
15652
2002-09-27  Daniel Berlin  
15653
 
15654
        * tree-ssa-pre.c (tree_perform_ssapre): Move insertion into
15655
        splay tree inside the is_simple_modify_expr block, to prevent
15656
        tree check failure.
15657
 
15658
2002-09-26  Daniel Berlin  
15659
 
15660
        * tree-ssa-pre.c (update_phis_in_list): New function.
15661
        (update_ssa_for_new_use): New function.
15662
        (code_motion): Start working on code to update SSA representation.
15663
        (find_reaching_def_of_var): New function.
15664
 
15665
2002-09-25  Steven Bosscher  
15666
 
15667
        * Makefile.in (tree): Add dependency on c-tree.h
15668
        * tree-optimize.c: Include c-tree.h
15669
        (optimize_function_tree): React to -fdump-tree-optimized.
15670
 
15671
2002-09-25  Daniel Berlin  
15672
 
15673
        * tree-dfa.c (add_list_to_ref_list_end): New function.
15674
        (add_list_to_ref_list_begin): Ditto.
15675
        (find_list_node): Handle searching in empty lists.
15676
        (find_refs_in_stmt): De-staticify.
15677
 
15678
        * tree-flow.h (add_list_to_ref_list_end): New declaration.
15679
        (add_list_to_ref_list_begin): Ditto.
15680
        (find_refs_in_stmt): Add prototype.
15681
 
15682
2002-09-25  Diego Novillo  
15683
 
15684
        * Makefile.in (tree-dfa.o): Depend on flags.h
15685
        * tree-cfg.c (tree_dump_cfg): Alter output format slightly.
15686
        (block_invalidates_loop): Look for clobbering definitions of
15687
        GLOBAL_VARIABLE.
15688
        * tree-simple.c (get_base_symbol): Handle EXPR_WITH_FILE_LOCATION
15689
        nodes.
15690
        * tree-optimize.c (init_tree_flow): Remove.  Update all users.
15691
        (build_tree_ssa): Don't call tree_find_refs.
15692
        Don't call tree_compute_rdefs.
15693
 
15694
        * tree-dfa.c: Include flags.h
15695
        (dump_file): Remove.
15696
        (dump_flags): Remove.
15697
        (pointer_refs): Remove.
15698
        (struct dfa_stats_d): Add fields max_num_phi_args, num_may_alias,
15699
        max_num_may_alias, num_alias_imm_rdefs and max_num_alias_imm_rdefs.
15700
        Remove field num_fcalls.
15701
        (dfa_counts): Declare.
15702
        (tree_find_refs): Declare.
15703
        (tree_ssa_dump_file): Declare.
15704
        (tree_ssa_dump_flags): Declare.
15705
        (dump_if_different): New function.
15706
        (add_default_defs): Remove.  Update all users.
15707
        (add_call_site_clobbers): Remove.  Update all users.
15708
        (add_ptr_may_refs): Remove.  Update all users.
15709
        (compute_may_aliases): New function.
15710
        (find_may_aliases_for): New function.
15711
        (add_may_alias): New function.
15712
        (may_alias_p): New function.
15713
        (is_visible_to): New function.
15714
        (get_alias_index): New function.
15715
        (call_sites): Remove.  Update all users.
15716
        (global_var): Declare.
15717
        (E_FCALL): Remove.  Adjust other constants.
15718
        (M_INDIRECT): Remove.  Update all users.
15719
        (M_RELOCATE): Declare.
15720
        (tree_find_refs): Move debugging dumps to tree_build_ssa.
15721
        Move initialization code to init_tree_ssa.
15722
        Call compute_may_aliases.
15723
        (find_refs_in_expr): For INDIRECT_REF nodes create a reference to
15724
        the canonical INDIRECT_REF node associated with the pointer symbol.
15725
        Given a pointer p, clobber the canonical INDIRECT_REF of p after
15726
        creating a V_DEF for p.
15727
        For CALL_EXPR nodes, if the called function is not pure nor
15728
        const, create a use and a clobbering definition to GLOBAL_VAR.
15729
        (create_ref): Allow INDIRECT_REF variables.
15730
        (add_phi_arg): Keep track of number of PHI arguments created.
15731
        (function_may_recurse_p): Look for clobbering definitions to
15732
        GLOBAL_VAR.
15733
        (get_fcalls): Remove unused function.
15734
        (is_pure_fcall): Remove unused function.
15735
        (fcall_takes_ref_args): Remove unused function.
15736
        (find_declaration): Stop iterating at ENTRY_BLOCK_PTR.
15737
        (debug_variable): New function.
15738
        (dump_variable): New function.
15739
        (dump_referenced_vars): Call it.
15740
        (dump_phi_args): Don't dump NULL arguments.
15741
        (PERCENT): Define.
15742
        (dump_dfa_stats): Re-format output.
15743
        Add new counters.
15744
        Call dump_if_different.
15745
        (collect_dfa_stats): Also recurse into GLOBAL_VAR.
15746
        (collect_dfa_stats_r): Collect may-alias information.
15747
        (count_tree_refs): Collect information about def-def links for
15748
        aliases.
15749
        Keep track of maximum values for number of PHI arguments, aliases
15750
        and def-def links.
15751
        (ref_type_name): Handle M_RELOCATE.
15752
        (validate_ref_type): Ditto.
15753
 
15754
        * tree-ssa.c: Add more documentation.
15755
        (tree_ssa_dump_file): Rename from dump_file.  Declare extern.
15756
        (tree_ssa_dump_flags): Rename from dump_flags.  Declare extern.
15757
        (added): New local varray.
15758
        (in_work): New local varray.
15759
        (work_stack): New local varray.
15760
        (dfa_counts): Declare.
15761
        (insert_phi_nodes_for): New local function.
15762
        (add_phi_node): New local function.
15763
        (set_ssa_links): New local function.
15764
        (set_alias_imm_reaching_def): New local function.
15765
        (create_default_def): New local function.
15766
        (init_tree_ssa): New local function.
15767
        (tree_find_refs): Relocate declaration from tree-flow.h
15768
        (tree_build_ssa): Call init_tree_ssa.
15769
        Call tree_find_refs.
15770
        Process all SSA-related dump options.
15771
        (insert_phi_nodes): Rename from insert_phi_terms.  Update all
15772
        users.
15773
        Call insert_phi_nodes_for.
15774
        (build_fud_chains): Add more documentation.
15775
        Initialize save_chain to 0.
15776
        (search_fud_chains): Add more documentation.
15777
        Call set_ssa_links.
15778
        Call create_default_def.
15779
        (tree_compute_rdefs): Initialize array marked to 0.
15780
        (follow_chain): Follow def-def chains for non-killing definitions
15781
        for aliases.
15782
        (dump_reaching_defs): Call dump_variable.
15783
 
15784
        * tree-flow.h (E_FCALL): Remove.  Update all users.
15785
        (M_INDIRECT): Remove.  Update all users.
15786
        (M_RELOCATE): Declare.
15787
        (struct var_ref): Add field alias_imm_rdefs.
15788
        (alias_imm_reaching_def): New inline function.
15789
        (struct tree_ann_d): Add field indirect_var.
15790
        Add field may_aliases.
15791
        (enum tree_flags): Relocate.
15792
        (indirect_var): New inline function.
15793
        (set_indirect_var): New inline function.
15794
        (may_alias): New inline function.
15795
        (num_may_alias): New inline function.
15796
        (struct dfa_counts_d): Declare.
15797
        (global_var): Declare.
15798
        (FCALL_NON_PURE, FCALL_PURE, FCALL_BUILT_IN): Remove.
15799
        (tree_find_refs): Move to tree-ssa.c.
15800
        (dump_variable): Declare.
15801
        (debug_variable): Declare.
15802
        (get_fcalls): Remove.
15803
        (is_pure_fcall): Remove.
15804
        (fcall_takes_ref_args): Remove.
15805
        (ref_defines): Declare.
15806
        (is_killing_def): Declare.
15807
        (get_alias_index): Declare.
15808
        (delete_tree_ssa): Rename from delete_ssa.  Update all users.
15809
        (set_currdef_for): Allow INDIRECT_REF nodes.
15810
        (bb_annotation): Don't create a new one if the block didn't have an
15811
        annotation already.
15812
 
15813
        * tree-ssa-ccp.c (substitute_and_fold): Rename from
15814
        ssa_ccp_substitute_constants.  Update all users.
15815
        Call replace_uses_in.
15816
        (replace_uses_in): New local function.
15817
        (evaluate_expr): Call it.
15818
        (initialize): Call get_base_symbol.
15819
 
15820
        * tree-ssa-dce.c (tree_ssa_eliminate_dead_code): Don't handle
15821
        E_FCALL.
15822
 
15823
2002-09-22  Diego Novillo  
15824
 
15825
        * Makefile.in (tree-dfa.o): Depend on hashtab.h.
15826
        * c-simplify.c (get_name): Declare extern.
15827
        * tree-cfg.c (tree_dump_cfg): Call it.
15828
        (tree_cfg2dot): Call it.
15829
        * tree-ssa-ccp.c (tree_ssa_ccp): Call get_name.
15830
        * tree-ssa-dce.c (tree_ssa_eliminate_dead_code): Call get_name.
15831
        * tree-ssa-pre.c (tree_perform_ssapre): Call get_name.
15832
        * tree-ssa.c (analyze_rdefs): Call get_name.
15833
        (dump_reaching_defs): Call get_name.
15834
        (dump_tree_ssa): Call get_name.
15835
        * tree.h (get_name): Declare.
15836
 
15837
        * tree-dfa.c: Include "hashtab.h"
15838
        (struct dfa_stats_d): New.
15839
        (collect_dfa_stats): New local function.
15840
        (collect_dfa_stats_r): New local function.
15841
        (count_tree_refs): New local function.
15842
        (count_ref_list_nodes): New local function.
15843
        (tree_find_refs): Call dump_begin on entry to the function.
15844
        (dump_referenced_vars): Call get_name.
15845
        (SCALE): Declare.
15846
        (LABEL): Declare.
15847
        (dump_dfa_stats): New function.
15848
        (debug_dfa_stats): New function.
15849
        * tree-dump.c (struct dump_option_value_info): Add entry for TDF_STATS.
15850
        * tree-flow.h (has_annotation): Remove.  Update all users.
15851
        (dump_dfa_stats): Declare.
15852
        (debug_dfa_stats): Declare.
15853
        (tree_annotation): Don't create one if the tree doesn't have one
15854
        already.  Update all users to new semantics.
15855
        * tree-ssa-dce.c (print_stats): Dump if dump_flags has TDF_STATS bit
15856
        set.
15857
        * tree-ssa.c (tree_build_ssa): Open dump file on entry.
15858
        Call dump_dfa_stats if dump_flags has TDF_STATS bit set.
15859
        Call dump_tree_ssa if dump_flags has TDF_DETAILS bit set.
15860
        * tree.h (TDF_STATS): Define.
15861
        * doc/invoke.texi: Document 'stats' flag for -fdump-tree.
15862
 
15863
        * tree-dfa.c (next_tree_ref_id): Change type to unsigned long.
15864
        Update all users.
15865
        tree-flow.h (tree_ref_common): Change type of field 'id' to
15866
        unsigned long.  Update all users.
15867
        (ref_id): Change return type to unsigned long.  Update all users.
15868
 
15869
2002-09-21  Daniel Berlin  
15870
 
15871
        * tree-ssa-pre.c (struct expr_info): Add repaired member.
15872
        (repair_injury): Track which injuries we repaired, so we don't
15873
        repair them > 1 time.
15874
 
15875
2002-09-20  Diego Novillo  
15876
 
15877
        * c-pretty-print.c (dump_c_node): Fix call to REAL_VALUE_TO_DECIMAL.
15878
 
15879
2002-09-20  Diego Novillo  
15880
 
15881
        * tree-dfa.c (find_refs_in_stmt): Fix botched call to
15882
        clobber_vars_r with CLEANUP_STMT nodes.
15883
 
15884
2002-09-20  Diego Novillo  
15885
 
15886
        * toplev.c (flag_tree_ssa): Remove.  Update all users.
15887
 
15888
2002-09-20  Frank Ch. Eigler  
15889
 
15890
        * gcc.c (cc1_options): Make -fmudflap imply -fno-merge-constants.
15891
        * varasm.c (categorize_decl_for_section): Likewise, for strings.
15892
        * tree-mudflap.c (mudflap_enqueue_decl): Don't be interested
15893
        in !TREE_USED decls.  Fix minor type warning.
15894
        (mf_offset_expr_of_array_ref): Create explicit temporary variables
15895
        for array index expressions instead of SAVE_EXPRs.  Update callers.
15896
        (mf_build_check_statement_for): Insert temp variables.
15897
        (mx_xfn_indirect_ref): Correct recursion-protection checking
15898
        sequence.  Tweak array check-base calculation back to "&array[0]".
15899
        (*): Use build_function_type_list instead of build_function_type.
15900
        (mx_external_ref): Remove unused parameter.  Update callers.
15901
 
15902
2002-09-19  Diego Novillo  
15903
 
15904
        * c-decl.c (c_expand_body): Invoke tree optimizers with -O1 and
15905
        above.
15906
        * flags.h (flag_tree_ssa): Remove.
15907
        * tree-cfg.c (find_expr_in_tree_helper): Change last argument type
15908
        to int.
15909
        * tree-dfa.c (create_ref): Ditto.
15910
        * tree-flow.h (num_referenced_vars): Change type to unsigned long.
15911
        * doc/invoke.texi (-ftree-ssa): Remove.
15912
        (-fdump-tree-{pre,ccp,dce}): Add to the summary section.
15913
        (-fdump-tree-xxx-details): Update documentation.
15914
        (-fdump-tree-ccp): Document.
15915
        (-fdump-tree-simple): Move elsewhere.
15916
 
15917
2002-09-19  Richard Henderson  
15918
 
15919
        * function.c (insns_for_mem_hash): Cast to size_t first.
15920
        * tree-dfa.c (num_referenced_vars): Unsigned long, not size_t.
15921
        (dump_referenced_vars): Use %lu for it.
15922
        (dump_ref): Use HOST_WIDE_INT_PRINT_DEC.
15923
        * tree-nomudflap.c (mudflap_c_function): Use ATTRIBUTE_UNUSED.
15924
        (mudflap_enqueue_decl, mudflap_enqueue_constant): Likewise.
15925
        * tree-ssa-pre.c (compute_idfs): Cast to size_t first.
15926
 
15927
        * tree-optimize.c (optimize_function_tree): Fix missed renamings.
15928
        * tree-ssa-pre.c (tree_perform_ssapre): Likewise.
15929
 
15930
2002-09-19  Jeff Law 
15931
 
15932
        * tree-dfa.c (find_refs_in_stmt): Search for references in the call
15933
        address of a CALL_EXPR.
15934
 
15935
2002-09-19  Daniel Berlin 
15936
 
15937
        * toplev.c: tree-ssa-* -> tree-*.
15938
 
15939
        * doc/invoke.texi: Ditto.
15940
 
15941
2002-09-19  Daniel Berlin 
15942
 
15943
        * flags.h: flag_tree_ssa_* -> flag_tree_*.
15944
 
15945
        * toplev.c: Ditto.
15946
 
15947
        * tree-optimize.c: Ditto.
15948
 
15949
        * tree-dump.c: dump-tree-ssa-* -> dump-tree-*.
15950
        TDI_ssa_* -> TDI_*.
15951
 
15952
        * tree.h: Ditto
15953
 
15954
        * tree-ssa-dce.c (tree_ssa_eliminate_dead_code): Fix dump handling.
15955
 
15956
2002-09-18  Daniel Berlin 
15957
 
15958
        * tree-dump.c (dump_files): Use dump-tree-ssa-??? for the option names
15959
        and "ssa-???" for the dump files.
15960
 
15961
        * tree.h: TDI_ccp and TDI_dce -> TDI_ssa_ccp and TDI_ssa_dce.
15962
 
15963
        * tree-ssa-ccp.c: TDI_ccp->TDI_ssa_ccp.
15964
 
15965
2002-09-18  Daniel Berlin 
15966
 
15967
        * tree-dump.c: Fix order of dump files
15968
 
15969
2002-09-17  Daniel Berlin 
15970
 
15971
        * tree-ssa-pre.c: Remove a lot of finding refs in statements junk.
15972
        Start on strength reduction.
15973
        Only generate simple statements.
15974
        Remove EXPR* macros in favor of inline functions.
15975
        Update comparisons and sets to 1 and 0 to true and false where
15976
        approriate.
15977
        (toplevel): Add DEBUGGING_STRRED define (temporary, for
15978
        implementation debugging, *not* useful as a dump option).
15979
        Add TODO notes.
15980
        Add global avdefs, orig_expr_map, need_repair_map,
15981
        strred_candidate.
15982
        (set_var_phis): Add struct expr_info * argument.
15983
        Update to handle injuring definitions.
15984
        (defs_y_dom_x): Ditto.
15985
        (phi_opnd_from_res): Ditto.
15986
        (phi_for_operand): Remove extra \.
15987
        (find_tree_ref_for_var): Renamed to find_use_for_var. Update all
15988
        callers.
15989
        Use orig_expr_map to lookup original expression, remove statement
15990
        searching gunk.
15991
        (find_rhs_use_for_var): New function.
15992
        (is_strred_cand): New function.
15993
        (is_injuring_def): New function.
15994
        (calculate_increment): New function.
15995
        (repair_injury): New function.
15996
        (set_need_repair): New function.
15997
        (struct expr_info): Add strred_cand member.
15998
        (rename_2): Update to handle injuring definitions.
15999
        (expr_phi_insertion): Ditto.
16000
        (code_motion): Update to repair injuries.
16001
        Only insert SIMPLE statements.
16002
        Free avdefs here now.
16003
        (finalize_1): Don't free avdefs anymore here.
16004
        (tree_perform_ssapre): Record original expresion for
16005
        find_use_for_var's benefit.
16006
        Determine strength reduction candidates.
16007
 
16008
        * tree-flow.h: Remove EXPR* macros in favor of inline functions.
16009
        Remove E_INJ.
16010
 
16011
        * tree-dfa.c: Change EXPR* macros to the new functions.
16012
        Remove E_INJ.
16013
 
16014
2002-09-18  Diego Novillo  
16015
 
16016
        * tree-dfa.c (M_ADDRESSOF): Define.
16017
        (find_refs_in_expr): Create addressof-use references for ADDR_EXPR
16018
        nodes.
16019
        Don't create references for FUNCTION_DECL nodes.
16020
        (ref_type_name): Handle M_ADDRESSOF.
16021
        (validate_ref_type): Ditto.
16022
        (clobber_vars_r): Don't clobber FUNCTION_DECL nodes.
16023
        * tree-flow.h (M_ADDRESSOF): Declare.
16024
 
16025
2002-09-17  Diego Novillo  
16026
 
16027
        * doc/invoke.texi: Document -ftree-ssa-dce and -fdump-tree-dce.
16028
        * cp/Make-lang.in (CXX_C_OBJS): Add tree-ssa-dce.o.
16029
 
16030
2002-09-17  Ben Elliston  
16031
 
16032
        * Makefile.in (C_AND_OBJC_OBJS): Add tree-ssa-dce.o.
16033
        tree-ssa-dce.o): New target.
16034
        * tree-ssa-dce.c: New file.
16035
        * flags.h (flag_tree_ssa_dce): Declare flag.
16036
        * tree.h (tree_dump_index): Add TDI_dce.
16037
        * toplev.c (flag_tree_ssa_dce): New flag.
16038
        (f_options): Add "dump-tree-all-ssa" option.
16039
        * tree-flow.h (enum tree_flags): Add TF_NECESSARY.
16040
        * tree-dump.c (dump_files): Add dump-tree-dce option.
16041
        (dump_enable_all_ssa): Enable it when dumping all.
16042
        * tree-optimize.h (tree_ssa_eliminate_dead_code): Declare.
16043
        * tree-optimize.c (optimize_function_tree): Invoke the
16044
        optimisation pass if flag_tree_ssa_dce is set.
16045
 
16046
2002-09-17  Diego Novillo  
16047
 
16048
        * Makefile.in (tree-ssa.o): Add dependency on c-tree.h
16049
        * c-simplify.c (mark_not_simple_r): Don't mark IDENTIFIER_NODEs.
16050
        * tree-dfa.c (function_may_recurse_p): Fix comment.
16051
        (dump_ref): Don't dump immediate uses for PHI nodes more than once.
16052
        (dump_referenced_vars): Unparse the name of the variable.
16053
        * tree-flow.h (dump_tree_ssa): Declare.
16054
        (debug_tree_ssa): Declare.
16055
        (replace_ref_operand_with): Check if OPERAND_P is NULL.
16056
        (restore_ref_operand): Ditto.
16057
        (tree_annotation): Check that constants, types and IDENTIFIER_NODEs
16058
        are not being annotated.
16059
        * tree-ssa.c: Include c-tree.h.
16060
        (dump_reaching_defs): Unparse the variable name.
16061
        (dump_tree_ssa): New function.
16062
        (tree_build_ssa): Call it.
16063
        (debug_tree_ssa): New function.
16064
 
16065
2002-09-14  Steven Bosscher 
16066
 
16067
        * dwarf2out.c (is_fortran): Return true for
16068
        DW_LANG_Fortran95.
16069
        (gen_compile_unit_die): Return DW_LANG_Fortran95 if
16070
        language is "GNU F95".
16071
 
16072
2002-09-13  Daniel Berlin  
16073
 
16074
        * tree-dump.c (dump_switch_p): Get longest match, not first one.
16075
 
16076
        * tree.h: Put TDI_* back in order, now that we do longest match
16077
        matching.
16078
 
16079
2002-09-13  Diego Novillo  
16080
 
16081
        * tree-dfa.c (add_call_site_clobbers): Call decl_function_context
16082
        instead of DECL_CONTEXT.
16083
        * tree-ssa-ccp.c (initialize): Ditto.
16084
        * tree-ssa.c (analyze_rdefs): Ditto.
16085
 
16086
2002-09-11  Diego Novillo  
16087
 
16088
        * tree-dfa.c (find_refs_in_stmt): Call clobber_vars_r to clobber
16089
        CLEANUP_STMT nodes.
16090
        (create_ref): Only add _DECL nodes to the list of referenced
16091
        variables.
16092
        (clobber_vars_r): Create a may-use reference prior to clobbering
16093
        the variable.
16094
        (add_call_site_clobbers): Ditto.
16095
        (add_ptr_may_refs): Move call to find_list_node where it's actually
16096
        needed.
16097
        * tree-flow.h: Update documentation on M_CLOBBER.
16098
 
16099
2002-09-10  Daniel Berlin  
16100
 
16101
        * tree-ssa-pre.c (defs_match_p): Fix typo ( | -> || ).
16102
 
16103
2002-09-10  Diego Novillo  
16104
 
16105
        * tree-dfa.c (V_PHI_ARG): Remove.  Adjust related constants.
16106
        Update all users.
16107
        (add_ref_to_list_after): Don't allocate memory for the
16108
        node when adding to the beginning or the end of the list.
16109
        (add_phi_arg): Don't call create_ref to add a new argument.
16110
        (debug_phi_args): New function.
16111
        (dump_phi_args): New function.
16112
        (dump_ref): Call it.
16113
        (dump_referenced_vars): Use 'file' instead of 'dump_file'.
16114
 
16115
        * tree-flow.h (V_PHI_ARG): Remove.  Update all users.
16116
        (struct var_ref): Move fields used in distinct
16117
        reference types to other structures.  Update all users.
16118
        (struct var_def): New.
16119
        (struct var_phi): New.
16120
        (struct var_use): New.
16121
        (union tree_ref_d): Add members vdef, vphi, vuse and vphi_arg.
16122
        Update all users.
16123
        (save_chain): Remove.  Update all users.
16124
        (set_save_chain): Remove.  Update all users.
16125
        (marked_with): Remove.  Update all users.
16126
        (mark_def_with): Remove.  Update all users.
16127
        (dump_reaching_defs): Declare.
16128
        (debug_reaching_defs): Declare.
16129
 
16130
        (struct phi_node_arg_d): New structure.
16131
        (phi_node_arg): New type.
16132
        (phi_arg): Change return type to phi_node_arg.
16133
        (imm_reaching_def_edge): Rename to phi_arg_edge.
16134
        (set_imm_reaching_def_edge): Rename to set_phi_arg_edge.
16135
        (phi_arg_def): New inline function.
16136
        (set_phi_arg_def): New inline function.
16137
        (debug_phi_args): Declare.
16138
        (dump_phi_args): Declare.
16139
 
16140
        * tree-ssa-ccp.c: Use new phi_node_arg type when examining PHI node
16141
        arguments.
16142
 
16143
        * tree-ssa-pre.c: Ditto.
16144
 
16145
        * tree-ssa.c (save_chain): New local variable.
16146
        (build_fud_chains, search_fud_chains): Use it.
16147
        (marked): New local variable.
16148
        (tree_compute_rdefs, follow_chain): Use it.
16149
        (dump_reaching_defs): New function.
16150
        (debug_reaching_defs): New function.
16151
 
16152
2002-09-09  Daniel Berlin 
16153
 
16154
        * Makefile.in (tree-alias-steen.o): Remove gt-tree-alias-steen.h
16155
        (tree-alias-common.o): Add dependency on c-common.h
16156
 
16157
        * tree-ssa-pre.c: Fix PRE now that V_USE's expr's are the entire
16158
        assignment, rather than just the right hand side.
16159
        Stop generating our own call clobbers
16160
 
16161
        * tree-dfa.c (create_ref): Make sure var is not null before checking
16162
        TREE_THIS_VOLATILE.
16163
 
16164
        * tree.h: Reorder TDI_* so ssapre comes before ssa.
16165
 
16166
        * tree-dump.c: dump-tree-ssapre has to come before dump-tree-ssa
16167
        in the table, or else it'll never match.
16168
 
16169
2002-09-09  Frank Ch. Eigler  
16170
 
16171
        * tree-mudflap.c (mf_offset_expr_of_array_ref): Fold constants along
16172
        the way.
16173
        (mf_build_check_statement_for): Ditto.  Flag new COMPONENT_REFs.
16174
        (mx_xfn_indirect_ref): Instrument COMPONENT_REFs specially.  Tweak
16175
        ARRAY_REF instrumentation to reduce need of copying and recursion.
16176
 
16177
2002-09-09  Diego Novillo  
16178
 
16179
        * tree-ssa.c (analyze_rdefs): Disable uninitialized variable warnings.
16180
 
16181
2002-09-09  Diego Novillo  
16182
 
16183
        * Makefile.in (tree-ssa.o): Add dependency on tree-simple.h.
16184
        (tree-dfa.o): Add dependency on tree-simple.h and tree-inline.h.
16185
        (tree-alias-steen.o): Add dependency on c-common.h.
16186
        (tree-optimize.o): Add dependency on c-common.h.
16187
 
16188
        * c-simplify.c (deep_copy_node): Call walk_tree with mostly_copy_tree_r.
16189
        (mostly_copy_tree_r): Also copy flags from original tree.
16190
        (mark_not_simple_r): Call set_tree_flag.
16191
 
16192
        * tree-alias-steen.c: Include c-common.h.
16193
 
16194
        * tree-cfg.c (map_stmt_to_bb): Remove.
16195
        (block_invalidates_loop): Change return type to bool.
16196
        (create_loop_hdr): New function.
16197
        (create_bb): Call it.
16198
        (create_bb_ann): Return newly created annotation object.
16199
        (remove_bb_ann): Nullify loop_hdr annotation, if there is one.
16200
        (tree_delete_bb): Only remove basic block annotation from
16201
        executables statements.
16202
        (is_computed_goto): New function.
16203
 
16204
        * tree-dfa.c (pointer_refs): New file local variable.
16205
        (call_sites): New global variable.
16206
        (V_DEF, V_USE, V_PHI, V_PHI_ARG, E_FCALL, E_PHI, E_USE, E_KILL,
16207
        E_INJ): New global constants.
16208
        (M_DEFAULT, M_CLOBBER, M_MAY, M_PARTIAL, M_INITIAL, M_INDIRECT,
16209
        M_VOLATILE): New global constants.
16210
        (num_referenced_vars): New global variable.
16211
        (referenced_vars): Rename from referenced_symbols.  Update all
16212
        users.
16213
        (clobber_vars_r): New function.
16214
        (add_default_defs): New function.
16215
        (add_call_site_clobbers): New function.
16216
        (add_ptr_may_refs): New function.
16217
        (add_phi_arg): New function.
16218
        (find_list_node): New function.
16219
        (remove_ref_from_list): Call it.
16220
        (add_ref_to_list_after): New function.
16221
        (is_pure_fcall): New function.
16222
        (fcall_takes_ref_args): New function.
16223
        (dump_referenced_vars): New function.
16224
        (debug_referenced_vars): New function.
16225
        (ref_type_name): New function.
16226
        (validate_ref_type): New function.
16227
        (debug_phi_args): Remove.
16228
        (dump_phi_args): Remove.
16229
        (add_referenced_var): Rename from add_ref_symbol.  Update all
16230
        users.
16231
        (dump_ref): Rename from dump_varref.  Update all users.
16232
        (debug_ref): Rename from debug_varref.  Update all users.
16233
        (dump_ref_list): Rename from dump_varref_list.  Update all users.
16234
        (dump_ref_array): Rename from dump_varref_array.  Update all users.
16235
        (next_tree_ref_id): Rename from next_varref_id.  Update all users.
16236
 
16237
        (tree_find_refs): Rename from tree_find_varrefs.  Update all users.
16238
        Call add_default_defs.
16239
        Call add_call_site_clobbers.
16240
        Call add_ptr_may_refs.
16241
        Call dump_referenced_vars.
16242
        Create and destroy pointer_refs list.
16243
 
16244
        (find_refs_in_stmt): Set reference type to clobbering definition
16245
        for the ASM_OUTPUTS and ASM_CLOBBERS expressions of an ASM_STMT.
16246
        Set reference type to initial definition for the DECL_INITIAL node
16247
        of a DECL_STMT.
16248
        Clobber everything in CLEANUP_STMT nodes.
16249
 
16250
        (find_refs_in_expr): Re-write.
16251
        Recursively clobber every VAR_DECL contained in non SIMPLE nodes.
16252
        Mark indirect pointer references with M_INDIRECT flag.
16253
        Add pointer references to pointer_refs list.
16254
        Glob references to arrays and structures.
16255
        Add function call expressions to call_sites list.
16256
 
16257
        (empty_ref_list): Do nothing if the list is empty already.
16258
        (delete_ref_list): Ditto.
16259
        (create_ref): Add new argument ADD_TO_BB.
16260
        Set M_VOLATILE modifier if this is a reference to a volatile
16261
        variable.
16262
        Count number of incoming edges for V_PHI references before
16263
        initializing the V_PHI_ARG array.
16264
        Only add reference to basic block if ADD_TO_BB is true.
16265
        Set output reference for the parent expression for V_DEF
16266
        references.
16267
        (remove_tree_ann): Do nothing if the tree didn't have an
16268
        annotation.
16269
 
16270
        * tree-flow.h (enum treeref_type): Remove.  Update all users.
16271
        (union varref_def): Ditto.
16272
        (tree_ref): Rename from varref.  Update all users.
16273
        (V_DEF): Declare.
16274
        (V_USE): Declare.
16275
        (V_PHI): Declare.
16276
        (V_PHI_ARG): Declare.
16277
        (E_FCALL): Declare.
16278
        (E_PHI): Declare.
16279
        (E_USE): Declare.
16280
        (E_KILL): Declare.
16281
        (E_INJ): Declare.
16282
        (M_DEFAULT): Declare.
16283
        (M_CLOBBER): Declare.
16284
        (M_MAY): Declare.
16285
        (M_PARTIAL): Declare.
16286
        (M_INITIAL): Declare.
16287
        (M_INDIRECT): Declare.
16288
        (M_VOLATILE): Declare.
16289
        (struct tree_ref_common): Rename from treeref_common.  Update all
16290
        users.
16291
        Change type of field 'type' to HOST_WIDE_INT.
16292
        Rename field 'sym' to 'var'.
16293
        (struct var_ref): Rename from varref.  Update all users.
16294
        Join the structures varuse
16295
        and vardef into a single structure.
16296
        (struct expr_ref_common): Rename from exprref_common.  Update all
16297
        users.
16298
        (struct expr_use): Rename from expruse.  Update all users.
16299
        (struct expr_phi): Rename from exprphi.  Update all users.
16300
        (union tree_ref_d): Rename from varref_def.  Update all users.
16301
        (EXPRPHI_PHI_ARGS): Rename from EXPRPHI_PHI_CHAIN.  Update all
16302
        users.
16303
        (struct tree_ann_d): Rename field 'compound_stmt' to
16304
        'compound_parent'.
16305
        Add field 'output_ref'.
16306
        (enum tree_flags): New enum.
16307
        (TF_REFERENCED): New flag.
16308
        (phi_arg): Remove.
16309
        (get_num_phi_args): Remove.
16310
        (get_phi_arg): Remove.
16311
 
16312
        (struct vardef): Remove.  Update all users.
16313
        (VARDEF_IMM_USES): Ditto.
16314
        (VARDEF_SAVE_CHAIN): Ditto.
16315
        (VARDEF_RUSES): Ditto.
16316
        (VARDEF_MARKED): Ditto.
16317
        (VARDEF_PHI_ARGS): Ditto.
16318
        (struct varuse): Ditto.
16319
        (VARUSE_IMM_RDEF): Ditto.
16320
        (VARUSE_RDEFS): Ditto.
16321
        (VARREF_ID): Ditto.
16322
        (VARREF_TYPE): Ditto.
16323
        (VARREF_BB): Ditto.
16324
        (VARREF_EXPR): Ditto.
16325
        (VARREF_OPERAND_P): Ditto.
16326
        (VARREF_STMT): Ditto.
16327
        (VARREF_SYM): Ditto.
16328
        (IS_DEFAULT_DEF): Ditto.
16329
        (IS_ARTIFICIAL_REF): Ditto.
16330
        (TREE_ANN): Ditto.
16331
        (BB_FOR_STMT): Ditto.
16332
        (TREE_CURRDEF): Ditto.
16333
        (TREE_REFS): Ditto.
16334
        (TREE_COMPOUND_STMT): Ditto.
16335
        (TREE_FLAGS): Ditto.
16336
        (BB_ANN): Ditto.
16337
        (BB_PARENT): Ditto.
16338
        (BB_REFS): Ditto.
16339
        (BB_PREV_CHAIN_P): Ditto.
16340
        (BB_BINDING_SCOPE): Ditto.
16341
        (BB_LOOP_HDR): Ditto.
16342
        (FOR_INIT_STMT_BB): Ditto.
16343
        (FOR_COND_BB): Ditto.
16344
        (FOR_EXPR_BB): Ditto.
16345
        (END_WHILE_BB): Ditto.
16346
        (DO_COND_BB): Ditto.
16347
        (BB_EMPTY_P): Ditto.
16348
 
16349
        (ref_type): New inline function.
16350
        (ref_var): New inline function.
16351
        (ref_stmt): New inline function.
16352
        (ref_expr): New inline function.
16353
        (ref_bb): New inline function.
16354
        (ref_id): New inline function.
16355
        (replace_ref_operand_with): New inline function.
16356
        (restore_ref_operand): New inline function.
16357
        (imm_uses): New inline function.
16358
        (save_chain): New inline function.
16359
        (set_save_chain): New inline function.
16360
        (reached_uses): New inline function.
16361
        (marked_with): New inline function.
16362
        (mark_def_with): New inline function.
16363
        (phi_args): New inline function.
16364
        (num_phi_args): New inline function.
16365
        (phi_arg): New inline function.
16366
        (imm_reaching_def): New inline function.
16367
        (set_imm_reaching_def): New inline function.
16368
        (imm_reaching_def_edge): New inline function.
16369
        (set_imm_reaching_def_edge): New inline function.
16370
        (reaching_defs): New inline function.
16371
        (tree_annotation): New inline function.
16372
        (has_annotation): New inline function.
16373
        (bb_for_stmt): New inline function.
16374
        (set_bb_for_stmt): New inline function.
16375
        (currdef_for): New inline function.
16376
        (set_currdef_for): New inline function.
16377
        (tree_refs): New inline function.
16378
        (add_tree_ref): New inline function.
16379
        (remove_tree_ref): New inline function.
16380
        (compound_parent): New inline function.
16381
        (set_compound_parent): New inline function.
16382
        (set_tree_flag): New inline function.
16383
        (clear_tree_flag): New inline function.
16384
        (tree_flags): New inline function.
16385
        (reset_tree_flags): New inline function.
16386
        (output_ref): New inline function.
16387
        (set_output_ref): New inline function.
16388
        (bb_annotation): New inline function.
16389
        (bb_parent): New inline function.
16390
        (set_bb_parent): New inline function.
16391
        (bb_refs): New inline function.
16392
        (remove_bb_ref): New inline function.
16393
        (prev_chain_p): New inline function.
16394
        (set_prev_chain_p): New inline function.
16395
        (binding_scope): New inline function.
16396
        (set_binding_scope): New inline function.
16397
        (header_blocks): New inline function.
16398
        (for_init_bb): New inline function.
16399
        (set_for_init_bb): New inline function.
16400
        (for_cond_bb): New inline function.
16401
        (set_for_cond_bb): New inline function.
16402
        (for_expr_bb): New inline function.
16403
        (set_for_expr_bb): New inline function.
16404
        (end_while_bb): New inline function.
16405
        (set_end_while_bb): New inline function.
16406
        (do_cond_bb): New inline function.
16407
        (set_do_cond_bb): New inline function.
16408
        (bb_empty_p): New inline function.
16409
 
16410
        (referenced_vars): Rename from referenced_symbols.  Update all
16411
        users.
16412
        (num_referenced_vars): Declare.
16413
        (NREF_SYMBOLS): Remove.  Update all users.
16414
        (REF_SYMBOL): Ditto.
16415
        (ADD_REF_SYMBOL): Ditto.
16416
        (referenced_var): New inline function.
16417
        (call_sites): Declare.
16418
        (next_tree_ref_id): Rename from next_varref_id.  Update all users.
16419
        (is_computed_goto): Declare.
16420
        (is_pure_fcall): Declare.
16421
        (fcall_takes_ref_args): Declare.
16422
        (add_ref_to_list_after): Declare.
16423
        (find_list_node): Declare.
16424
        (ref_type_name): Declare.
16425
        (validate_ref_type): Declare.
16426
 
16427
        * tree-optimize.c: Include c-common.h.
16428
        (optimize_function_tree): Store DECL_SAVED_TREE in a local
16429
        variable.
16430
 
16431
        * tree-ssa-ccp.c (cp_lattice_meet): New function.
16432
        (visit_phi_node): Call it.
16433
        (add_outgoing_control_edges): New function.
16434
        (visit_expression_for): Call it.
16435
        Don't handle static initializers.
16436
        Handle computed gotos.
16437
        (add_control_edge): New function.
16438
        (visit_condexpr_for, simulate_block, add_outgoing_control_edges): Call
16439
        it.
16440
        (simulate_def_use_chains): Only look at unmodified V_USE references.
16441
        (ssa_ccp_substitute_constants): Ditto.
16442
        (evaluate_expr): Ditto.
16443
        (initialize): Set initial value for incoming parameters and globals
16444
        to VARYING.
16445
        Set initial value for initialized static variables to VARYING,
16446
        unless the variable is read-only.
16447
        (set_lattice_value): Don't special case globals, volatiles and
16448
        variables with their address taken.
16449
 
16450
        * tree-ssa.c: Include tree-simple.h.
16451
        (tree_build_ssa): Don't add default definitions.
16452
        (insert_phi_terms): Add new PHI nodes at the beginning of the list
16453
        of references for the basic block.
16454
        (search_fud_chains): Add def-def chains for non-killing
16455
        definitions.
16456
        (delete_ssa): Remove list call_sites.
16457
        Set num_referenced_vars to 0.
16458
        Set referenced_vars to NULL.
16459
        (follow_chain): Follow def-def chains for non-killing definitions.
16460
        (is_upward_exposed): Change return type to bool.
16461
        (add_phi_arg): Remove.
16462
 
16463
2002-09-06  Frank Ch. Eigler  
16464
 
16465
        * tree-mudflap.c (deferred_static_decl*): Correct GTY markup.
16466
        (mudflap_enqueue_decl): Correct iteration bounds.
16467
        (mf_init_extern_trees): Add more constness to mf_cache_structptr_type.
16468
        (mf_offset_expr_of_array_ref): Remove excess mx_flagging.  save_expr
16469
        array subscripts.
16470
        (mf_build_check_statement_for): Reorganize to take explicit
16471
        check-base/size arguments, in addition to value argument.  save_expr
16472
        array subscripts.  Copy value/base/size subtrees.
16473
        (mx_xfn_indirect_ref): Support marking of subtrees for nontraversal.
16474
        Track source line numbers more aggressively.  For arrays, check bounds
16475
        from base through indexed element, not just the indexed element.
16476
        Use nontraversal flagging to eliminate some excess instrumentation.
16477
        (mf_xform_derefs): Support nontraversal by a hash table.
16478
        (*): Remove "{{{"/"}}}" folding marks.
16479
 
16480
2002-09-02  Daniel Berlin  
16481
 
16482
        * tree-alias-common.[ch]: New files.
16483
        * tree-alias-steen.[ch]: Split out common stuff into
16484
        tree-alias-common.[ch].
16485
        * c-config-lang.in: Modify to use tree-alias-common.[ch] instead of
16486
        tree-alias-steen, since this is where the GTY'd stuff is now.
16487
        * Makefile.in: Add dependencies for tree-alias-common.[ch].
16488
 
16489
2002-09-03  Diego Novillo  
16490
 
16491
        * c-simplify.c (simplify_goto_stmt): New function.
16492
        (simplify_stmt): Call it.
16493
        * tree-simple.c: Document grammar for GOTO_STMT nodes.
16494
        (rationalize_compound_expr): Wrap it with #if 0/#endif.
16495
        (get_base_symbol): Minor comment fixup.
16496
 
16497
2002-09-03  Frank Ch. Eigler  
16498
 
16499
        * gcc.c (MFWRAP_SPEC): Add --wrap=alloca.
16500
 
16501
2002-09-01  Diego Novillo  
16502
 
16503
        * c-simplify.c (simplify_stmt): Mark CLEANUP_STMTs and ASM_STMTs
16504
        not SIMPLE.
16505
        (simplify_for_stmt): Do not allow expression sequences in
16506
        FOR_INIT_STMT and FOR_EXPR nodes.
16507
        * tree-simple.c: Document difference with original SIMPLE grammar.
16508
 
16509
2002-08-31  Frank Ch. Eigler  
16510
 
16511
        * tree-mudflap.c (mf_build_check_statement_for): Tolerate dereference
16512
        of void pointers.
16513
        (mx_register_decl): Correct typo in below patch.
16514
 
16515
2002-08-30  Graydon Hoare  
16516
 
16517
        * tree-mudflap.c (mx_register_decl): Mark declarations as
16518
        TREE_ADDRESSABLE when mudflap decides to register them.
16519
 
16520
2002-08-29  Graydon Hoare  
16521
 
16522
        * tree-mudflap.c (mx_xfn_indirect_ref): Rewrite array references as
16523
        pointer dereferences.
16524
        (struct mf_xform_decls_data): New member: param_decls.
16525
        (mx_register_decl): New function.
16526
        (mx_xfn_xform_decls): Factor code out into mx_register_decl.
16527
        Register live parameters with mudflap.
16528
        (mx_xfn_find_addrof): Notice references to fields of structures
16529
        and function parameters.
16530
 
16531
2002-08-29  Frank Ch. Eigler  
16532
 
16533
        * c-pretty-print.c (dump_c_tree): Detect loops in statement chains
16534
        using a hash table to track visited status.
16535
        * Makefile.in: Add hashtab.h dependency.
16536
 
16537
2002-08-28  Frank Ch. Eigler  
16538
 
16539
        * tree-mudflap.c (mudflap_enqueue_constant): Register non-string
16540
        constants also.
16541
        (mf_build_check_statement_for): Include pushlevel/pushdecl/poplevel
16542
        for local variables.
16543
 
16544
2002-08-27  Frank Ch. Eigler  
16545
 
16546
        Better static registration:
16547
        * varasm.c (make_decl_rtl): Handle DECL_RTL_SET_P case for
16548
        mudflap static registration.
16549
        * tree-mudflap.c (mudflap_enqueue_decl): Rewrite to handle
16550
        deferred statics.
16551
        (mudflap_finish_file): Call above fn back for deferred statics.
16552
 
16553
        Cleanup:
16554
        * tree-mudflap.c (mf_varname_tree, mf_file_function_line_tree):
16555
        Reorganize output_buffer reuse mechanism.
16556
        (mf_build_check_statement_for): Set TREE_SIDE_EFFECTS.
16557
        (mx_xfn_indirect_ref): Correct file/line collection tests.
16558
 
16559
        Dynamic linking support:
16560
        * gcc.c (MFWRAP_SPEC): Make conditional on -static.  Add the
16561
        newer wrapped functions dlopen/mmap/munmap.
16562
        (MFLIB_SPEC): Be sensitive to -static.  Partial support for
16563
        dynamic linking.
16564
 
16565
2002-08-26  Diego Novillo  
16566
 
16567
        * Makefile.in (tree-ssa.o): Add dependency on ggc.h
16568
        (c-simplify.o): Add dependency on langhooks-def.h
16569
        * c-simplify.c: Include langhooks-def.h
16570
        (simplify_function_tree): Do nothing if the front end does not
16571
        support simplification.
16572
 
16573
        * tree-flow.h (struct vardef): Remove fields 'phi_chain' and
16574
        'phi_chain_bb'.
16575
        Add field 'phi_args'.
16576
        (VARDEF_PHI_CHAIN): Remove.  Update all users.
16577
        (VARDEF_PHI_CHAIN_BB): Remove.  Update all users.
16578
        (VARDEF_PHI_ARGS): Define.
16579
        (struct varuse): Rename field 'chain' to 'imm_rdef'.  Update all
16580
        users.
16581
        (VARUSE_IMM_RDEF):  Rename from VARUSE_CHAIN.  Update all users.
16582
        (phi_arg): New structure.
16583
        (get_num_phi_args): New function.
16584
        (get_phi_arg): New function.
16585
        (set_phi_arg): New function.
16586
        (add_phi_arg): New function.
16587
        (debug_phi_args): Declare.
16588
        (dump_phi_args): Declare.
16589
        * tree-dfa.c (create_ref): Remove initialization of
16590
        VARDEF_PHI_CHAIN and VARDEF_PHI_CHAIN_BB.
16591
        Initialize array VARDEF_PHI_ARGS.
16592
        (dump_varref): Call dump_phi_args.
16593
        (dump_phi_args): New function.
16594
        (debug_phi_args): New function.
16595
        * tree-ssa-ccp.c (PHI_PARMS): Remove.
16596
        (EIE): Remove.
16597
        (visit_phi_node): Get the argument's edge directly from the
16598
        argument instead of calling find_edge.
16599
        (initialize): Cast call to NUM_EDGES to unsigned.
16600
        * tree-ssa-pre.c: Update uses of VARDEF_PHI_CHAIN,
16601
        VARDEF_PHI_CHAIN_BB and VARUSE_CHAIN everywhere.
16602
        * tree-ssa.c: Ditto.
16603
        Include ggc.h.
16604
        (search_fud_chains): Call add_phi_arg to add arguments to each PHI
16605
        node.
16606
        (tree_ssa_remove_phi_alternative): Call set_phi_arg to switch the
16607
        last element with the element being removed.
16608
 
16609
2002-08-26  Diego Novillo  
16610
 
16611
        * c-simplify.c (mostly_copy_tree_r): Unshare STMT_EXPR
16612
        nodes.
16613
 
16614
2002-08-25  Diego Novillo  
16615
 
16616
        * tree-dfa.c (find_refs_in_stmt): Replace calls to
16617
        RETURN_EXPR with RETURN_STMT_EXPR.
16618
        * c-simplify.c (simplify_return_stmt): Ditto.
16619
        (deep_copy_node): Ditto.
16620
        * c-pretty-print.c (dump_c_node): Ditto.
16621
 
16622
2002-08-24  Diego Novillo  
16623
 
16624
        * c-pretty-print.c: Add `break' after calls to NIY in
16625
        switch statements.
16626
 
16627
2002-08-23  Jeffrey A Law  (law@redhat.com)
16628
 
16629
        * tree-ssa-ccp.c (tree_ssa_ccp): Remove #if 0 that accidentally
16630
        got checked in.  Cleanup the cfg to remove unreachable blocks
16631
        discovered by CCP.
16632
 
16633
        * basic-block.h (EDGE_EXECUTABLE): New edge flag.
16634
 
16635
        * cfganal.c (find_edge): New function.
16636
 
16637
        * ssa-ccp.c: Convert to use EDGE_EXECUTABLE bit in the
16638
        edge flags rather than a bitmap.  Convert edge worklist
16639
        into a varray.  Avoids expensive find_index_edge calls.
16640
        * tree-ssa-ccp.c: Likewise.
16641
 
16642
        * tree-flow.h (tree_ssa_remove_phi_alternative): Declare.
16643
        * tree-ssa.c (tree_ssa_remove_phi_alternative): New function.
16644
        * tree-ssa-ccp.c (optimize_unexecutable_edges): Remove
16645
        PHI alternatives for unexecutable edges.  Also remove
16646
        unexecutable edges from the CFG.
16647
 
16648
2002-08-22  Jeffrey A Law  (law@redhat.com)
16649
 
16650
        * Makefile.in (tree-optimize.o): Depend on tree-dchain.o
16651
        * tree-optimize.c: Include tree-dchain.h.
16652
        (optimize_function_tree): Unconditionally build and tear down
16653
        the backpointers for the statement chain.
16654
 
16655
2002-08-22  Diego Novillo  
16656
 
16657
        * tree-dfa.c (find_refs_in_stmt): Look for VARUSE references in
16658
        initialization expressions.
16659
        (find_refs_in_expr): Reformat.
16660
        (remove_ref_from_list): Optimize for the common case of removing
16661
        the head or the tail of the list.
16662
        (add_ref_to_list_end): Reformat comment.
16663
        (create_ref): Store the reference to LHS of assignment expressions.
16664
        (dump_varref): Also dump immediate uses of PHI nodes.
16665
        * tree-flow.h (IS_GHOST_DEF): Rename to IS_DEFAULT_DEF.  Update all
16666
        callers everywhere.
16667
        (struct tree_ann_def): Update comments for field 'currdef'.
16668
        * tree-ssa-ccp.c (ssa_edges): Change type to ref_list.
16669
        (SSA_NAME): Remove.
16670
        (initialize): New function
16671
        (finalize): New function.
16672
        (visit_expression): Rename to visit_expression_for.  Update all
16673
        callers.
16674
        (visit_condexpr_for): New function.
16675
        (visit_assignment): Rename to visit_assignment_for.  Update all
16676
        callers.
16677
        (examine_flow_edges): Rename to simulate_block.  Update all
16678
        callers.
16679
        (follow_def_use_chains): Rename to simulate_def_use_chains.  Update
16680
        all callers.
16681
        (evaluate_expr_for): Rename to evaluate_expr.  Change argument to
16682
        'tree'.
16683
        (set_lattice_value): New function.
16684
        (tree_ssa_ccp): Change main loop to visit flow_edges and ssa_edges
16685
        alternately.
16686
        (visit_phi_node): Do not set the lattice value to UNDEFINED when we
16687
        find a non-executable edge.
16688
        (visit_expression_for): Default definitions for PARM_DECLs are
16689
        assigned a VARYING value.
16690
        Default definitions for any other local variables are assigned an
16691
        UNDEFINED value.
16692
        Clobber VARDEFs that are not the LHS of an assignment.
16693
        Clobber VARDEFs that initialize non-const static variables.
16694
        * tree-ssa.c (search_fud_chains): Set up def-use edges for PHI
16695
        nodes and regular definitions.
16696
 
16697
        * tree.c (simple_cst_equal): Call simple_cst_list_equal to compare
16698
        CONSTRUCTOR_ELTS pointers.
16699
 
16700
2002-08-22  Diego Novillo  
16701
 
16702
        * c-pretty-print.c (buffer): New file local variable.
16703
        (initialized): New file local variable.
16704
        (print_c_tree): Don't call init_output_buffer.  Call
16705
        maybe_init_pretty_print.
16706
        (print_c_node): Ditto.
16707
        (print_c_node_brief): Ditto.
16708
        (maybe_init_pretty_print): New function.
16709
        * tree-mudflap.c (mf_varname_tree): Only call init_output_buffer
16710
        once.  Call output_clear_message_text before returning.
16711
 
16712
2002-08-21  Frank Ch. Eigler  
16713
 
16714
        Support source-file/line coordinates in check/violation messages.
16715
        * tree-mudflap.c (mf_init_extern_trees): Add new "location" formal
16716
        arg to __mf_check.
16717
        (mf_file_function_line_tree): New function to build an actual location
16718
        string.
16719
        (build_check_statement_for): Call it / pass it.
16720
        (mx_xfn_indirect_ref): Track source file/line location via
16721
        STMT_LINENO, FILE_STMT, EXPR_WITH_FILE_LOCATION traversal memos.
16722
 
16723
2002-08-21  Daniel Berlin  
16724
 
16725
        * dominance.c: Cache immediate dominators.
16726
 
16727
2002-08-20  Daniel Berlin  
16728
 
16729
        * tree-alias-steen.h (struct tree_alias_ops): Add flag for
16730
        interprocedural.
16731
 
16732
        * tree-alias-steen.c (steen_alias_ops): Set interprocedural to 0
16733
        for now.
16734
        (intra_function_call): New function to handle intraprocedural calling.
16735
        (finc_func_aliases): Use it.
16736
        Handle *x = *y, *x = &y, and *x = (cast) y.
16737
        (display_points_to_set_helper): New function, split from ...
16738
        (display_points_to_set): Here.
16739
        (create_alias_vars): Try to print all alias vars we find in the
16740
        alias_vars array, rather than just those that are linked directly to
16741
        trees.
16742
        Clear arrays when we finish if we aren't interprocedural.
16743
 
16744
2002-08-20  Frank Ch. Eigler  
16745
 
16746
        static object registration support:
16747
        * tree-mudflap.c (mudflap_enqueue_decl, mudflap_enqueue_constant):
16748
        Replace stubs with real code.
16749
        (mf_enqueue_register_call): New function to generate asm-object
16750
        call to __mf_register.
16751
        (mf_flush_enqueued_calls): New function to emit global ctor function
16752
        with enqueued __mf_register calls.
16753
        (mf_varname_tree): Tolerate being called from non-function context.
16754
        * c-objc-common.c: #include .
16755
 
16756
        gengtypes support for mudflap:
16757
        * Makefile.in (GTFILES): Include tree-mudflap.c.
16758
        (gt-tree-mudflap.h): New target.
16759
        * tree-mudflap.c: Annotate global tree nodes with GTY(()).
16760
        * tree-nomudflap.c: Add dummy ggc root table.
16761
 
16762
2002-08-19  Diego Novillo  
16763
 
16764
        * tree-dfa.c (find_refs_in_expr): If the current sub-expression is
16765
        not SIMPLE, mark its parent.
16766
        (create_ref): If the parent expression is not SIMPLE, create
16767
        VARDEFs regardless of the original reference type.
16768
 
16769
        * tree-ssa-ccp.c (widen_bitfield): New function.
16770
        (evaluate_expr_for): Call it.
16771
 
16772
2002-08-18  Diego Novillo  
16773
 
16774
        * tree-ssa-ccp.c (evaluate_expr_for): Fix thinko in
16775
        2002-08-17 patch.
16776
 
16777
2002-08-17  Diego Novillo  
16778
 
16779
        * tree-ssa-ccp.c (evaluate_expr_for): keep VARREF_SYM in a local
16780
        variable.
16781
 
16782
2002-08-16  Diego Novillo  
16783
 
16784
        * basic-block.h (BB_CONTROL_EXPR): Update value.
16785
        (BB_LOOP_CONTROL_EXPR): Define.
16786
        (BB_CONTROL_ENTRY): Update value.
16787
        * tree-cfg.c (make_for_stmt_blocks): Flag header blocks withh
16788
        BB_LOOP_CONTROL_EXPR.
16789
        (make_while_stmt_blocks): Ditto.
16790
        (make_do_stmt_blocks): Ditto.
16791
        (tree_delete_bb): Update annotations in the loop entry block when
16792
        removing one of the loop expression blocks.
16793
 
16794
        * tree-dfa.c (tree_find_varrefs): Disregard empty blocks.
16795
        (find_refs_in_stmt): Handle all the loop expression blocks in
16796
        FOR_STMT and DO_STMT nodes.
16797
        (find_refs_in_expr): Change first argument to tree *.  Update all
16798
        callers.
16799
        Force all references to be definitions when the expression is not
16800
        in SIMPLE form.
16801
        Also create references for compound variables and array references.
16802
        Not just their individual components.
16803
        Always use the original parent expression when making recursive
16804
        calls.
16805
        (create_ref): Add new argument operand_p.  Update all callers.
16806
        (remove_tree_ann): New function.
16807
        (dump_varref): Don't assume that the referenced symbol is a _DECL
16808
        node.
16809
        * tree-flow.h (treeref_common): Add field operand_p.
16810
        (VARREF_OPERAND_P): Define.
16811
        (BB_EMPTY_P): Define.
16812
        (remove_tree_ann): Declare.
16813
        (create_ref): Add new argument operand_p.
16814
        * tree-simple.c (get_base_symbol): New function.
16815
        * tree-simple.h (get_base_symbol): Declare.
16816
        * tree-ssa-ccp.c (visit_assignment): Call it.
16817
        (ssa_ccp_substitute_constants): Use VARREF_OPERAND_P to replace
16818
        values into the expression.
16819
        (evaluate_expr_for): Ditto.
16820
        Do not try to evaluate the expression if the reference is not of
16821
        the same type as the expression.
16822
        After evaluation, restore the expression to its original form.
16823
        * tree-ssa-pre.c (insert_occ_in_preorder_dt_order_): Update calls
16824
        to create_ref.
16825
        (finalize_): Ditto.
16826
        (expr_phi_insertion): Ditto.
16827
        * tree-ssa.c (tree_build_ssa): Ditto.
16828
        (insert_phi_terms): Ditto.
16829
        (delete_ssa): Call remove_tree_ann.
16830
 
16831
2002-08-15  Diego Novillo  
16832
 
16833
        * c-pretty-print.c: Move extern definitions to diagnostic.h.
16834
        (print_c_node_brief): New function.
16835
        (debug_c_node_brief): New function.
16836
        (debug_c_node): Add option for showing brief versions of statement
16837
        nodes.  Update all callers.
16838
        (print_declaration): Ditto.
16839
        * c-simplify.c (simplify_function_tree): Add newline to debug
16840
        output.
16841
        * c-tree.h (print_c_node_brief): Declare.
16842
        (debug_c_node_brief): Declare.
16843
        * tree-cfg.c: Call print_c_node_brief in debugging otuput.
16844
        * tree-mudflap.c (dump_c_node): Remove extern declaration.
16845
        (mf_varname_tree): Update call to dump_c_node.
16846
 
16847
2002-08-15  Daniel Berlin  
16848
 
16849
        * tree-cfg.c (find_expr_in_tree_helper): Renamed from find_expr_in_tree.
16850
        (find_expr_in_tree): Redone.
16851
 
16852
2002-08-15  Daniel Berlin  
16853
 
16854
        * tree-cfg.c (insert_before_ctrl_stmt): Fix insertion for various
16855
        parts of for loop.
16856
 
16857
        * tree-ssa-pre.c (finalize_1): Set EXPR_STMT type to type of
16858
        expression in it.
16859
 
16860
2002-08-14  Frank Ch. Eigler  
16861
 
16862
        * gcc.c (LINK_COMMAND_SPEC): Tweak placement of %(mflib).
16863
 
16864
2002-08-14  Diego Novillo  
16865
 
16866
        * tree-simple.h (is_simple_decl_stmt): Declare.
16867
 
16868
2002-08-13  Frank Ch. Eigler  
16869
 
16870
        * gcc.c (MFWRAP_SPEC, MFLIB_SPEC): New macros, splitting MFLIB_SPEC.
16871
        (mfwrap_spec, mflib_spec): Define corresponding vars.
16872
        (static_specs): Define correponding spec aliases.
16873
        (LINK_COMMAND_SPEC): Include -fmudflap refs to new spec aliases.
16874
        (cpp_unique_options): Move -fmudflap MFCPP_SPEC clause here.
16875
        (cc1_options): Move -fmudflap MFCC1_SPEC clause here.
16876
        (MFCC1_SPEC, MFCPP_SPEC, MFLIB_SPEC): Remove macros and uses.
16877
 
16878
2002-08-13  Graydon Hoare  
16879
 
16880
        * tree-mudflap.c (mf_build_check_statement_for): Factor code out of
16881
        mx_xfn_indirect_ref for use in ARRAY_REF case.
16882
        (mf_build_check_statement_for): Check size of underlying object
16883
        rather than size of pointer.
16884
        (mx_xfn_indirect_ref): Check ARRAY_REF expressions.
16885
        (mf_offset_expr_of_array_ref): New function to calculate array ref
16886
        offsets.
16887
 
16888
2002-08-13  Diego Novillo  
16889
 
16890
        * tree-simple.c (is_simple_condexpr): Update comment.
16891
        * tree-ssa-ccp.c (ssa_ccp_substitute_constants): Add debugging code.
16892
 
16893
2002-08-12  Jason Merrill  
16894
 
16895
        * c-typeck.c (build_component_ref): Don't add a NON_LVALUE_EXPR
16896
        in C99 mode.
16897
 
16898
        * c-simplify.c (simplify_expr): Always simplify.  Loop if *expr_p
16899
        changed.
16900
        (simplify_addr_expr): Just replace *expr_p if we have a '&*'.
16901
        * tree-simple.c (is_simplifiable_builtin): Add more tree codes.
16902
 
16903
2002-08-11  Diego Novillo  
16904
 
16905
        * c-simplify.c: Fix typo.  Substitute CHECKING with ENABLE_CHECKING.
16906
        * tree-cfg.c: Ditto.
16907
        * tree-dfa.c: Ditto.
16908
        * tree-ssa-ccp.c: Ditto.
16909
        * tree-ssa.c: Ditto.
16910
 
16911
2002-08-11  Diego Novillo  
16912
 
16913
        * tree-dfa.c (find_refs_in_expr): Use the given ref_type for some unary
16914
        expressions.
16915
        (create_ref): Insert ghost definitions at the beginning of the
16916
        basic block.
16917
        (find_expr_in_tree): Ignore IDENTIFIER_NODE.
16918
        * tree-flow.h (treeref_common): Move the id field to the end of the
16919
        structure.
16920
        (IS_GHOST_DEF): Redefine to return non zero for definitions
16921
        without an associated expression in basic block 0.
16922
        * tree-ssa-ccp.c (tree_ssa_ccp): Use last_basic_block to allocate
16923
        executable_blocks.
16924
        (visit_expression): Set the lattice value for ghost definitions to
16925
        VARYING.
16926
        (examine_flow_edges): Update comments.
16927
        * tree-ssa.c (tree_build_ssa): Create ghost definitions in basic
16928
        block 0.
16929
        (insert_phi_terms): Don't ignore ghost definitions.
16930
 
16931
        * c-simplify.c (simplify_function_tree): Return 0 if the function's
16932
        body is not a COMPOUND_STMT.
16933
        Return 0 if simplification failed.
16934
        (simplify_expr): Change to return int.  Return non zero if
16935
        simplification was successful.
16936
        (c_simplify_expr): Add default case to avoid compile time warnings.
16937
        (create_tmp_alias_var): Reformat comment.
16938
        * tree-simple.h (simplify_expr): Change return type to int.
16939
 
16940
        * c-simplify.c: Guard consistency checks with #if defined CHECKING
16941
        everywhere.
16942
        * tree-cfg.c: Ditto.
16943
        * tree-dfa.c: Ditto.
16944
        * tree-ssa-ccp.c: Ditto.
16945
        * tree-ssa.c: Ditto.
16946
 
16947
        * c-simplify.c: Include hard-reg-set.h, basic-block.h and
16948
        tree-flow.h.
16949
        (mark_not_simple_r): New function.
16950
        (simplify_expr): Temporarily mark VA_ARG_EXPR and BIT_FIELD_REF
16951
        trees as not simplifiable.
16952
        (simplify_call_expr): If the builtin cannot be simplified, flag it.
16953
        * Makefile.in (c-simplify.o): Update dependencies.
16954
        * tree-dfa.c (create_ref): Variable references inside
16955
        non-simplifiable expressions are always considered definitions.
16956
        * tree-flow.h (TF_NOT_SIMPLE): New flag.
16957
        * tree-simple.c (is_simplifiable_builtin): Update comments.
16958
 
16959
        * c-pretty-print.c (dump_c_node): Unparse anonymous structures and
16960
        unions.
16961
        Change rendering for SAVE_EXPR and BIT_FIELD_REF.
16962
 
16963
        * Makefile.in (tree-mudflap.o, tree-nomudflap.o): Add.
16964
 
16965
2002-08-11  Frank Ch. Eigler  
16966
 
16967
        Prototype -fmudflap support.
16968
        * Makefile.in (C_AND_OBJC_OBJS): Add tree-mudflap.o.
16969
        (OBJS): Add tree-nomudflap.o.
16970
        * flags.h (flag_mudflap): New flag.
16971
        * toplev.c: Map "-fmudflap" to that flag.
16972
        * c-decl.c (c_expand_body): Call mudflap_c_function if flag_mudflap.
16973
        * c-objc-common.c (c_objc_common_finish_file): Add mudflap hook.
16974
        * varasm.c (make_decl_rtl): Add mudflap hook.
16975
        (output_constant_def_contents): Ditto.
16976
        * tree-mudflap.c: New file: implement mudflap instrumentation.
16977
        * tree-nomudflap.c: New file: stub functions for non-C frontends.
16978
        * tree-mudflap.h: New file: define exported functions.
16979
        * gcc.c (MFLIB_SPEC, MFCC1_SPEC, MFCPP_SPEC): Add general
16980
        -fmudflap spec mappings.
16981
        * c-simplify.c (simplify_stmt): Stub: handle CLEANUP_STMT nodes.
16982
        * tree-dfa.c (find_refs_in_stmt): Ditto.
16983
        * c-pretty-print.c (dump_c_node): Ditto.
16984
        (print_declaration): Handle "extern" decls.  Handle arrays with
16985
        indefinite sizes.
16986
        * tree-simple.h (is_simple_stmt, is_simple_compstmt): Remove decls.
16987
 
16988
2002-08-11  Jason Merrill  
16989
 
16990
        * c-simplify.c (simplify_self_mod_expr): Unshare the lhs before
16991
        using it again.
16992
        (simplify_compound_lval): Don't unshare.
16993
 
16994
        * c-simplify.c (c_simplify_expr): Check statement_code_p.
16995
 
16996
        * c-simplify.c (maybe_fixup_loop_cond): Move to cp/cp-simplify.c.
16997
        (simplify_for_stmt): Don't call it.
16998
        (simplify_while_stmt): Don't call it.
16999
 
17000
2002-08-11  Diego Novillo  
17001
 
17002
        * c-simplify.c (simplify_compound_lval): Use mostly_copy_tree_r.
17003
 
17004
2002-08-09  Jason Merrill  
17005
 
17006
        * langhooks-def.h: Replace the simplify_function_tree hook
17007
        with a simplify_expr hook.
17008
        * langhooks.h: Likewise.
17009
        * langhooks.c: Replace lhd_simplify_function_tree with
17010
        lhd_simplify_expr.
17011
        * c-lang.c (LANG_HOOKS_SIMPLIFY_FUNCTION_TREE): Don't define.
17012
        (LANG_HOOKS_SIMPLIFY_EXPR): Define.
17013
        * c-decl.c (c_expand_body): De-hook simplify_function_tree.
17014
        * c-common.h: Declare c_simplify_expr.
17015
        * c-simplify.c (simplify_function_tree): Rename from
17016
        c_simplify_function_tree.  Call simplify_expr instead of
17017
        simplify_stmt.
17018
        (c_simplify_expr): Split out from...
17019
        (simplify_expr): ...here.  No longer static.  Call langhook.
17020
        (is_simple_decl_stmt): Move here from tree-simple.c.
17021
        * tree-simple.c: Don't include c-tree.h.
17022
        (is_simple_stmt, is_simple_compstmt): Remove.
17023
        (is_simple_decl_stmt): Move to c-simplify.c.
17024
        * tree.h: Declare simplify_function_tree.
17025
        * tree-simple.h: Declare simplify_expr, add_tree.
17026
 
17027
        * tree-simple.c (rationalize_compound_expr): New fn.
17028
 
17029
2002-08-07  Diego Novillo  
17030
 
17031
        * basic-block.h (EDGE_TRUE_VALUE): Define.
17032
        (EDGE_FALSE_VALUE): Define.
17033
        * tree-cfg.c: Include c-tree.h.
17034
        (make_for_stmt_edges): Call simple_cst_equal to determine infinite
17035
        and zero iteration loops.
17036
        Set EDGE_TRUE_VALUE and EDGE_FALSE_VALUE to edges coming out of
17037
        predicate block.
17038
        (make_while_stmt_edges): Ditto.
17039
        (make_do_stmt_edges): Ditto.
17040
        (make_if_stmt_edges): Set EDGE_TRUE_VALUE and EDGE_FALSE_VALUE to
17041
        edges coming out of predicate block.
17042
 
17043
        * c-simplify.c (simplify_compound_lval): Unshare the compound
17044
        reference before simplification.
17045
 
17046
        * tree-cfg.c (insert_before_ctrl_stmt): Call print_c_node instead of
17047
        print_node_brief.
17048
        (insert_before_normal_stmt): Ditto.
17049
        (insert_after_ctrl_stmt): Ditto.
17050
        (insert_after_normal_stmt): Ditto.
17051
        (insert_after_loop_body): Ditto.
17052
        (replace_expr_in_tree): Ditto.
17053
        (tree_dump_bb): Ditto.
17054
 
17055
        * tree-dfa.c: Include c-tree.h
17056
        (next_varref_id): New global variable.
17057
        (tree_find_varrefs): Initialize it to 0.
17058
        (create_ref): Increment it after creating a new reference.  Store
17059
        it in ref.common.id.
17060
        Add the new reference to the list of references for the containing
17061
        expression.
17062
        (dump_varref): Show the reference ID.
17063
        * tree-flow.h (treeref_common): Add field 'id'.
17064
        (VARREF_ID): Define.
17065
 
17066
        * tree-dump.c (dump_files): Re-order dump files.
17067
        * tree.h (tree_dump_index): Ditto.
17068
 
17069
        * tree-optimize.c (optimize_function_tree): Remove blank lines.
17070
 
17071
        * tree-simple.c: Remove unary operator '!' from grammar.
17072
 
17073
        * tree-flow.h (tree_ann_def): Add field 'flags'.
17074
        (TF_FOLD): Define.
17075
        (TREE_ANN): Re-define into an lvalue.
17076
        (BB_FOR_STMT): Ditto.
17077
        (TREE_CURRDEF): Ditto.
17078
        (next_varref_id): Declare.
17079
        * tree-ssa-ccp.c: Include tree-simple.h
17080
        (ssa_edges): Convert sbitmap into varray_type.  Update all uses.
17081
        (decl_map): Remove.
17082
        (SSA_NAME): Use VARREF_ID instead of DECL_UID.
17083
        (visit_assignment): New function.
17084
        (evaluate_expr_for): New function.
17085
        (dump_lattice_value): New function.
17086
        (tree_ssa_ccp): Add debugging dumps.
17087
        Remove #if 0 code everywhere.
17088
        (visit_phi_node): Add debugging dumps.
17089
        Also visit PHI arguments.
17090
        Remove basic block argument
17091
        (visit_expression): Re-implement.
17092
        (examine_flow_edges): Add debugging dumps.
17093
        (ssa_ccp_substitute_constants): Add debugging dumps.
17094
        Update comments.
17095
        Mark and fold expressions with substituted constants.
17096
        * tree-ssa.c (search_fud_chains): Don't check if BB_REFS(bb) is
17097
        empty before iterating.
17098
        Add comment explaining how we chain PHI node arguments to their
17099
        originating basic block.
17100
 
17101
        * Makefile.in (tree-cfg.o, tree-dfa.o, tree-ssa-ccp.o): Update
17102
        dependencies.
17103
 
17104
2002-07-29  Daniel Berlin  
17105
 
17106
        * tree-ssa-pre.c (tree_perform_ssapre): Ben forgot to add a
17107
        dump_begin call when he removed the before dump.
17108
 
17109
2002-07-24  Daniel Berlin  
17110
 
17111
        * tree-alias-ecr.c (ECR_new_with_type): Use correct number in mapping.
17112
 
17113
2002-07-23  Daniel Berlin  
17114
 
17115
        * c-simplify.c (simplify_for_stmt): Deep copy the result of the
17116
        tail_expression, so it's unshared.
17117
 
17118
2002-07-23  Daniel Berlin  
17119
 
17120
        * tree-flow.h: Add prototype for create_alias_vars.
17121
 
17122
        * tree-alias-steen.c (display_points_to_set): New function.
17123
        (init_alias_vars): Display points to sets when we are done.
17124
 
17125
        * disjoint-set.h (disjoint_set_def): ptr_alias to ECR_def so that
17126
        we mark parent properly.
17127
 
17128
2002-07-24  Diego Novillo  
17129
 
17130
        * Makefile.in (GTFILES): Move tree-alias-type.[ch],
17131
        tree-alias-ecr.[ch], tree-alias-steen.[ch] from ...
17132
        * c-config-lang.in (gtfiles): ... here.
17133
 
17134
        * tree-simple.c (is_simplifiable_builtin): Replace
17135
        BUILT_IN_VARARGS_START with BUILT_IN_VA_START.
17136
 
17137
2002-07-23  Andreas Jaeger  
17138
 
17139
        * tree-ssa-pre.c (hash_expr_tree): Remove.
17140
 
17141
        * c-call-graph.c (write_dtd): Remove.
17142
 
17143
        * tree-ssa.c (delete_refs): Remove.
17144
 
17145
2002-07-23  Andreas Jaeger  
17146
 
17147
        * gengtype.c (open_base_files): Add tree.h.
17148
 
17149
        * tree-alias-type.h: Remove inclusion of tree.h.
17150
 
17151
        * tree-alias-steen.c: Include tree.h.
17152
        Add prototype for create_fun_alias_var_ptf.
17153
 
17154
        * tree-alias-ecr.c: Add prototype for ECR_add_pending.
17155
 
17156
        * tree-ssa-pre.c (calculate_preorder): Remove unused variables.
17157
 
17158
        * tree-simple.c: Include expr.h and rtl.h for prototypes.
17159
 
17160
        * tree-optimize.c: Include tree-alias-steen.h for prototypes.
17161
 
17162
        * Makefile.in (tree-optimize.o): Add tree-alias-steen.h.
17163
        (tree-simple.o): Add expr.h and rtl.h.
17164
        (tree-alias-steen.o): Add tree.h.
17165
 
17166
        * diagnostic.h: Add declaration of debug_output_buffer.
17167
 
17168
        * c-call-graph.c (construct_call_graph): Make static to follow
17169
        declaration.
17170
        (construct_call_graph): Use #if 0 instead of C++ comments to
17171
        disable code.
17172
 
17173
2002-07-20  Andreas Jaeger  
17174
 
17175
        * doc/invoke.texi (Option Summary): Fix syntax.
17176
 
17177
2002-07-19  Jason Merrill  
17178
 
17179
        * c-simplify.c (simplify_return_stmt): Do simplify a returned
17180
        expression in a void function.
17181
 
17182
        * c-simplify.c (simplify_stmt_expr): Handle C++ return semantics.
17183
 
17184
2002-07-19  Jason Merrill  
17185
 
17186
        * c-pretty-print.c (dump_c_node) [TARGET_EXPR]: Handle.
17187
        [COND_EXPR]: Print a returned expression in a void function.
17188
 
17189
2002-07-19  Ben Elliston  
17190
 
17191
        * tree-ssa-pre.c (tree_perform_ssapre): Don't dump the original
17192
        tree before applying this optimisation.
17193
 
17194
        * flags.h (flag_dump_tree_all_ssa): New flag.
17195
        * toplev.c (flag_dump_tree_all_ssa): New flag.
17196
        (f_options): Add "dump-tree-all-ssa" option.
17197
        (process_options): Process flag_dump_tree_all_ssa.
17198
        * tree.h (dump_enable_all_ssa): Declare.
17199
        * tree-dump.c (dump_enable_all_ssa): New function.
17200
        * doc/invoke.texi (Option Summary): Add -fdump-tree-all-ssa and
17201
        -fdump-tree-ssapre options.
17202
        (Debugging Options): Describe in more detail.
17203
        * c-simplify.c (c_simplify_function_tree): Dump the original tree
17204
        only if a TDI_original dump is requested, rather than TDI_simple.
17205
 
17206
        * tree-dump.c (dump_begin): Include phase number in dump filename.
17207
 
17208
2002-07-18  Ben Elliston  
17209
 
17210
        * tree-dump.c (dump_files): Rename "unparse" to "raw".
17211
        * tree.h (TDF_UNPARSE): Rename from this ..
17212
        (TDF_RAW): .. to this.
17213
        * tree-ssa-pre.c (tree_perform_ssapre): Use TDF_RAW and invert the
17214
        logical sense of this flag.
17215
        * tree-ssa-ccp.c (tree_ssa_ccp): Likewise.
17216
        * c-simplify.c (c_simplify_function_tree): Likewise.
17217
 
17218
2002-07-18  Daniel Berlin  
17219
 
17220
        * tree-ssa-pre.c (calculate_preorder): New function.
17221
        (tree_perform_ssapre): Use it, rather than
17222
        flow_compute_preorder_tranversal, which seems to not do
17223
        what we want.
17224
 
17225
2002-07-18  Daniel Berlin 
17226
 
17227
        * tree-alias-type.c: Move gt-tree-alias-type include to end of file.
17228
 
17229
        * tree-alias-steen.c: Move gt-tree-alias-steen include to end of file.
17230
 
17231
2002-07-18  Daniel Berlin  
17232
 
17233
        * gengtype.c (get_base_file_bitmap): Mark tree-alias-* and
17234
        disjoint-set* as c/c++/objc files only.
17235
 
17236
        * Makefile.in (gt-tree-alias-type.h): Add.
17237
        (tree-alias-type.o): Add dependency on gt-tree-alias-type.h.
17238
 
17239
        * tree-alias-type.c: Include gt-tree-alias-type.h.
17240
        (alias_bottom): Add a GTY marked version of alias_bottom here.
17241
 
17242
        * tree-alias-type.h: Remove the GTY marker from alias_bottom.
17243
 
17244
2002-07-17  Daniel Berlin  
17245
 
17246
        * tree-alias-ecr.c (ECR_union_pending_sets): Only clear bitmap if
17247
        it's not NULL.
17248
 
17249
2002-07-16  Jason Merrill  
17250
 
17251
        * c-simplify.c (add_tree): Build an EXPR_STMT immediately.
17252
        (convert_to_stmt_chain): Remove.
17253
        (simplify_stmt, simplify_for_stmt, simplify_while_stmt,
17254
        simplify_do_stmt, simplify_expr_wfl, tail_expression): Adjust.
17255
 
17256
2002-07-17  Daniel Berlin  
17257
 
17258
        * tree-alias-ecr.c: New file. Equivalence Class Representation.
17259
 
17260
        * tree-alias-steen.c: New file. Steengaard Alias Analysis.
17261
 
17262
        * disjoint-set.c: New file. Disjoint set data structure.
17263
 
17264
        * tree-alias-type.c: New file. Alias types.
17265
 
17266
        * c-simplify.c (create_tmp_alias_var): New function, like
17267
        create_tmp_var, but doesn't add it to the current binding.
17268
 
17269
        * tree-simple.h: Prototype for create_tmp_alias_var.
17270
 
17271
        * tree-optimize.c (build_tree_ssa): Create alias variables, if
17272
        requested.
17273
 
17274
        * flags.h: Add flag_tree_points_to.
17275
 
17276
        * toplev.c: Ditto.
17277
 
17278
        * gengtype.c (open_base_files): Add disjoint-set.h,
17279
        tree-alias-ecr.h, tree-alias-type.h, tree-flow.h.
17280
 
17281
        * Makefile.in (C_AND_OBJC_OBJS): Add disjoint-set.o,
17282
        tree-alias-ecr.o, tree-alias-type.o, tree-alias-steen.o.
17283
        (tree-alias-steen.o): Add dependencies.
17284
        (tree-alias-ecr.o): Ditto.
17285
        (tree-alias-type.o): Ditto.
17286
        (disjoint-set.o): Ditto.
17287
 
17288
2002-07-10  Daniel Berlin  
17289
            Diego Novillo  
17290
 
17291
        * Makefile.in (C_AND_OBJC_OBJS): Add tree-ssa-ccp.o
17292
        * flags.h (flag_tree_ssa_ccp): Declare.
17293
        * fold-const.c (eval_subst): Make extern.
17294
        * toplev.c (flag_tree_ssa_ccp): Define.
17295
        (f_options): Document -ftree-ssa-ccp.
17296
        * tree-dump.c (dump_files): Add -fdump-tree-ccp.
17297
        * tree-flow.h (tree_perform_ssapre): Move declaration ...
17298
        * tree-optimize.h: ... here.
17299
        (tree_ssa_ccp): Declare.
17300
        * tree-optimize.c (optimize_function_tree): Call tree_ssa_ccp.
17301
        * tree-ssa-ccp.c: New file.
17302
        * tree.c (next_decl_uid): Remove static declaration.
17303
        * tree.h (next_decl_uid): Declare.
17304
        (tree_dump_index): Add TDI_ccp.
17305
        * cp/Make-lang.in (CXX_C_OBJS): Add tree-ssa-ccp.o.
17306
        * doc/invoke.texi: Document -ftree-ssa-pre and -ftree-ssa-ccp.
17307
 
17308
2002-07-09  Daniel Berlin  
17309
 
17310
        s/varrays of refs/ref_list of refs/g
17311
 
17312
        * tree-flow.h: Add ref_list structure.
17313
        Add prototypes for ref_list functions.
17314
        (FOR_EACH_REF, FOR_EACH_REF_REV): New macros to iterate through
17315
        ref lists.
17316
        * tree-cfg.c, tree-ssa.c, tree-ssa-pre.c: Update all uses.
17317
 
17318
        * tree-dfa.c (create_ref_list): New function.
17319
        (delete_ref_list): Ditto.
17320
        (empty_ref_list): Ditto.
17321
        (add_ref_to_list_end): Ditto.
17322
        (add_ref_to_list_begin): Ditto.
17323
        (remove_ref_from_list): Ditto.
17324
 
17325
2002-07-04  Diego Novillo  
17326
 
17327
        * tree-simple.c (is_simplifiable_builtin): Don't simplify target
17328
        builtins.
17329
 
17330
2002-07-03  Diego Novillo  
17331
 
17332
        * c-simplify.c (simplify_decl_stmt): Unshare the
17333
        initializer nodes before simplification.
17334
 
17335
2002-06-29  Aldy Hernandez  
17336
            Diego Novillo  
17337
 
17338
        * c-simplify.c (simplify_call_expr): Do not bail on all builtins.
17339
        (is_simple_call_expr): Same.
17340
        (simplify_addr_expr): New function.
17341
        (simplify_expr): Call it.
17342
 
17343
        * tree-simple.c (is_simplifiable_builtin): New.
17344
        (is_simple_compound_lval): Do not bail on INDIRECT_REF.
17345
 
17346
        * tree-simple.h: New prototype for is_simplifiable_builtin.
17347
 
17348
2002-06-26  Daniel Berlin  
17349
 
17350
        * tree-ssa.c (tree_build_ssa): Call free_dominance_info, not
17351
        free, on idom.
17352
 
17353
        * tree-ssa-pre.c (compute_domchildren): Update to use new
17354
        dominance_info structure, rather than idom array.
17355
        (tree_perform_ssapre): Don't forget to free the dominance info.
17356
 
17357
        s/VARRAY_FREE/VARRAY_CLEAR/g now that VARRAY's are ggc allocated.
17358
 
17359
2002-06-24  Diego Novillo  
17360
 
17361
        * tree-ssa.c (build_fud_chains): Use dominance_info instead of int *.
17362
        (search_fud_chains): Ditto.
17363
        Call get_immediate_dominator.
17364
        * tree-ssa-pre.c (a_dom_b): Call dominated_by_p.
17365
        (pre_idom): Change type to dominance_info.  Update all uses.
17366
        (pre_doms): Remove.  Update all uses.
17367
 
17368
2002-06-20  Jason Merrill  
17369
 
17370
        Simplify DECL_STMT, CONSTRUCTOR and COMPOUND_LITERAL_EXPR.
17371
        * tree-simple.c (is_simple_decl_stmt): New fn.
17372
        (is_simple_constructor, is_simple_constructor_elt): New fns.
17373
        (is_simple_stmt, is_simple_unary_expr): Use them.
17374
        (is_simple_modify_expr): Accept an INIT_EXPR.
17375
        (is_simple_id): Don't allow a COMPOUND_LITERAL_EXPR.
17376
        (is_simple_unary_expr): Here either.
17377
        * c-simplify.c (simplify_decl_stmt, simplify_constructor): New fns.
17378
        (simplify_compound_literal_expr): New fn.
17379
        (simplify_stmt, simplify_expr): Use them.
17380
        (get_initialized_tmp_var): Use an INIT_EXPR.
17381
        (simplify_modify_expr): Accept an INIT_EXPR.
17382
        (simplify_for_stmt): Call simplify_decl_stmt.
17383
        (get_name): Don't crash if the decl is anonymous.
17384
        (tail_expression): New fn.
17385
        * tree-simple.h: Declare new fns.
17386
        * c-pretty-print.c (dump_c_node) [INIT_EXPR]: Print like MODIFY_EXPR.
17387
        (dump_c_node, op_prio): Handle COMPOUND_LITERAL_EXPR.
17388
        * c-simplify.c (simplify_expr_wfl): Only wrap pre and post stuff
17389
        that came from our subexpression.
17390
        (simplify_stmt): Restore stmts_are_full_exprs_p.
17391
 
17392
        * c-simplify.c (simplify_expr_wfl): Bracket substatements with
17393
        FILE_STMTs rather than wrapping them in EXPR_WITH_FILE_LOCATION.
17394
        (simplify_stmt): Update lineno and input_filename from stmts.
17395
        (simplify_expr et al): Don't copy lineno between stmts.  Don't pass
17396
        enclosing stmt down.
17397
        (update_line_number): Remove.
17398
 
17399
        * c-simplify.c (simplify_expr_stmt): Don't check
17400
        is_last_stmt_of_scope.
17401
        (simplify_stmt_expr): Check it here.  Set *expr_p to void_zero_node
17402
        instead of NULL_TREE.
17403
        (expr_has_effect): No need to deal with NULL exprs now.
17404
        (simplify_expr_wfl): Likewise.
17405
 
17406
2002-06-18  Diego Novillo  
17407
 
17408
        * c-simplify.c (strip_off_ending): Rename to remove_suffix.
17409
        Update callers.
17410
        (is_last_stmt_of_scope): New function.
17411
        (simplify_expr_stmt): Call it.
17412
        (stmt_has_effect): Ditto.
17413
        (c_simplify_function_tree): Update comment.
17414
 
17415
2002-06-18  Jason Merrill  
17416
 
17417
        * c-simplify.c (maybe_fixup_loop_cond): New fn for C++ conditions.
17418
        (simplify_for_stmt, simplify_while_stmt): Use it.
17419
 
17420
        * c-pretty-print.c (dump_c_node) [COMPONENT_REF]: Print "->" if
17421
        appropriate.
17422
 
17423
2002-06-19  Jason Merrill  
17424
 
17425
        * c-simplify.c (simplify_stmt_expr): New fn.
17426
        (simplify_expr): Call it.
17427
        (stmt_expr_level): Remove.
17428
        (stmt_has_effect, c_simplify_function_tree): Remove refs.
17429
        (expr_has_effect): Deal with null expression.
17430
        (simplify_expr_wfl): If the subexpression is simplified away, drop
17431
        this one, too.  Don't wrap statements.
17432
        * tree-simple.c (is_simple_unary_expr): Don't allow a STMT_EXPR.
17433
        * tree-inline.c (copy_tree_r): Clear the aux field in the copies.
17434
 
17435
2002-06-17  Frank Ch. Eigler  
17436
 
17437
        * c-pretty-print.c (dump_c_node): Print pointer-type
17438
        integer constants as raw numbers with a "B" (bytes) suffix.
17439
 
17440
2002-06-17  Jason Merrill  
17441
 
17442
        * c-simplify.c (simplify_stmt): Take a tree *.
17443
        (various): Adjust.
17444
 
17445
2002-06-16  Daniel Berlin  
17446
 
17447
        * c-simplify.c (get_name): New function.
17448
        (get_initialized_tmp_var): Use it to try to get a prefix for
17449
        create_tmp_var from the value we are initializing to.
17450
        (simplify_cond_expr): Add prefix for create_tmp_var.
17451
        (create_tmp_var): Add prefix argument.
17452
 
17453
        * tree-simple.h: Change create_tmp_var prototype to match.
17454
 
17455
        * tree-ssa-pre.c: Change create_tmp_var call.
17456
 
17457
2002-06-15  Diego Novillo  
17458
 
17459
        * Makefile.in (c-decl.o): Add dependency on langhooks.h
17460
        (c-simplify.o): Add dependency on flags.h, langhooks.h, toplev.h
17461
        and rtl.h.
17462
        * c-decl.c: Include langhooks.h.
17463
        (c_expand_body): Simplify the function.  If it succeeds and
17464
        -ftree-ssa is enabled, call optimize_function_tree.
17465
        * c-simplify.c: Include flags.h, rtl.h and toplev.h.
17466
        (simplify_expr_stmt): New function.
17467
        (simplify_stmt): Call it.
17468
        * tree-optimize.c: Don't include langhooks.h.
17469
        (optimize_function_tree): Don't call lang_hooks.simplify_function_tree.
17470
 
17471
        * c-decl.c (c_expand_body): Do not simplify nor optimize the
17472
        function if -fdisable-simple is given.
17473
        * c-simplify.c (simplify_expr): Use is_simple_addr_expr_arg when
17474
        simplifying ADDR_EXPR nodes.
17475
        * flags.h (flag_disable_simple): Declare.
17476
        * toplev.c (flag_disable_simple): Define.
17477
        (f_options): Document -fdisable-simple.
17478
        (process_options): Warn if -fdisable-simple is used with
17479
        optimization enabled.
17480
        * tree-simple.c (is_simple_addr_expr_arg): New function.
17481
        (is_simple_unary_expr): Call it.
17482
        * tree-simple.h (is_simple_addr_expr_arg): Declare.
17483
        * doc/invoke.texi: Document -fdisable-simple.
17484
 
17485
        * c-pretty-print.c (dump_c_node): Handle DECL_STMT nodes inside
17486
        FOR_INIT_STMT.
17487
        * c-simplify.c (c_simplify_function_tree): Don't do anything if the
17488
        program had errors.
17489
        (simplify_stmt): Skip DECL_STMTs.
17490
        (simplify_for_stmt): Handle DECL_STMT nodes inside FOR_INIT_STMT.
17491
        (simplify_save_expr): New function.
17492
        (simplify_expr): Call it.
17493
        (tree_last_decl): Handle cases where DECL_STMTs are found before
17494
        the body of the function.
17495
        * tree-simple.c (is_simple_stmt): Handle DECL_STMT nodes inside
17496
        FOR_INIT_STMT.
17497
        (is_simple_compound_lval): Handle nodes wrapped in NON_LVALUE_EXPR.
17498
 
17499
2002-06-14  Frank Ch. Eigler  
17500
 
17501
        * c-pretty-print.c (dump_c_node): Print more type qualifiers,
17502
        especially for pointers.
17503
 
17504
2002-06-11  Diego Novillo  
17505
 
17506
        * c-simplify.c: Remove folding markers.
17507
        (insert_before_first): Remove unused function.
17508
        * tree-cfg.c: Remove folding markers.
17509
        * tree-dfa.c: Ditto.
17510
        * tree-flow.h: Ditto.
17511
        * tree-optimize.c: Ditto.
17512
        * tree-optimize.h: Ditto.
17513
        * tree-simple.c: Ditto.
17514
        * tree-ssa.c: Ditto.
17515
 
17516
2002-06-11  Jason Merrill  
17517
 
17518
        * c-simplify.c (add_tree): Don't deep-copy expressions.
17519
        (simplify_for_stmt): Only deep-copy pre_cond_s the first time.
17520
        Don't deep copy expr_chain.
17521
 
17522
2002-06-10  Diego Novillo  
17523
 
17524
        * tree-cfg.c (remove_bb_ann): Don't call VARRAY_FREE.
17525
        * tree-dfa.c (create_ref): Use sizeof (ref) instead of
17526
        refs->element_size.
17527
        * tree.h (struct tree_common): Skip field 'aux' from GC type
17528
        information.
17529
        * tree-optimize.c (optimize_function_tree): Don't call
17530
        VARRAY_REF.
17531
        * tree-ssa.c (insert_phi_terms): Ditto.
17532
        (delete_refs): Ditto.
17533
        * c-simplify.c (simplify_array_ref): Ditto.
17534
        * simple-break-elim.c: Disable whole file.
17535
        * simple-goto-elim.c: Disable whole file.
17536
 
17537
2002-06-10  Jason Merrill  
17538
 
17539
        * c-simplify.c (simplify_switch_stmt): Let simplify_expr handle
17540
        post-effects.  Reorder.
17541
        (simplify_if_stmt): Likewise.  Don't build redundant comparison.
17542
        (simplify_do_stmt, simplify_while_stmt): Likewise.
17543
        (simplify_for_stmt): Likewise.  Remove POST_P parm.
17544
        (simplify_stmt): Adjust.
17545
        (insert_before_first): #if 0, no longer used.
17546
 
17547
        * c-pretty-print.c (dump_c_node): Print FIX_TRUNC_EXPR, FLOAT_EXPR
17548
        et al as casts.  Add parens as needed.
17549
 
17550
        * tree-simple.c (is_union_based_ref): New fn.
17551
        (is_simple_min_lval): Use it.  Rename from is_simple_arraybase.
17552
        (is_simple_arrayref): Adjust.  Use loop instead of recursion.
17553
        (is_simple_compref): Likewise.
17554
        (is_simple_compref_lhs): Remove.
17555
        * tree-simple.h: Adjust.
17556
        * c-simplify.c (simplify_array_ref): Adjust.
17557
        (simplify_component_ref): Adjust.
17558
 
17559
        * c-simplify.c (simplify_expr_common): Tweak ordering.
17560
        (get_initialized_tmp_var): Let simplify_expr handle post-effects.
17561
        * tree-simple.c (is_simple_stmt): Accept an rhs for a return expr.
17562
 
17563
        * c-simplify.c (simplify_boolean_expr): Avoid redundant tests.
17564
        Give the temp the appropriate type for a boolean value, and
17565
        reconvert at the end.
17566
 
17567
        * c-simplify.c (simplify_self_mod_expr): Don't duplicate side-effects.
17568
 
17569
        * c-simplify.c (simplify_return_stmt): Accept a SIMPLE rhs.
17570
        Just hand off to simplify_expr.
17571
 
17572
        * c-simplify.c (get_initialized_tmp_var): New fn.
17573
        (simplify_expr_common): Use it.  Handle post-effects internally if
17574
        POST_P is NULL.
17575
        (is_simple_tmp_var): Rename from simple_tmp_var_p.
17576
        * tree-simple.h: Adjust.
17577
 
17578
2002-06-09  Diego Novillo  
17579
 
17580
        * c-simplify.c (simplify_return_stmt): Update folding markers.
17581
        (build_addr_expr): Ditto.
17582
        * langhooks.h (struct langhooks): Document simplify_function_tree
17583
        hook.
17584
 
17585
2002-06-09  Jason Merrill  
17586
 
17587
        * c-simplify.c (simplify_expr_common): Handle creating both lvalue
17588
        and rvalue temps.  Add new parameter to specify which.
17589
        (simplify_expr): Now just a wrapper.
17590
        (simplify_lvalue_expr): Likewise.
17591
        (simplify_expr_either): New wrapper.
17592
        (simplify_component_ref): Use it instead of simplify_lvalue_expr.
17593
 
17594
        * c-pretty-print.c (debug_c_tree): Add a trailing newline.
17595
        (debug_c_node): Likewise.
17596
        * gdbinit.in (pct): New macro, calls debug_c_tree.
17597
 
17598
2002-06-08  Jason Merrill  
17599
 
17600
        * tree-simple.c (is_simple_unary_expr): Only allow the address of
17601
        a varname.
17602
        (is_simple_id): Allow STRING_CST.
17603
        * c-simplify.c (simplify_expr_common): Split out from simplify_expr.
17604
        Do simplify ADDR_EXPR.
17605
        (simplify_lvalue_expr): Use it and build_addr_expr.  Take
17606
        simple_test_f.
17607
        (simplify_modify_expr): Adjust.
17608
        (build_addr_expr): New fn.
17609
        (simplify_array_ref): Use simplify_lvalue_expr.
17610
        (simplify_component_ref): Likewise.
17611
 
17612
        * tree-simple.c (is_simple_rhs): Remove condexpr rule.
17613
        (is_simple_compref_lhs): Remove &ID.idlist rule.
17614
        (is_simple_relop): New fn.
17615
        (is_simple_binary_expr, is_simple_condexpr): Use it.
17616
        * tree-simple.h: Declare it.
17617
 
17618
        * c-simplify.c (create_tmp_var): Refuse to create an array temp.
17619
        (simple_tmp_var_p): New fn.
17620
        (simplify_lvalue_expr): Use it; make sure we don't return a temp.
17621
        * tree-simple.h: Declare it.
17622
 
17623
        * c-pretty-print.c (dump_c_node) [ARRAY_REF]: Wrap array in parens
17624
        as needed.
17625
        [COMPONENT_REF]: Likewise.
17626
        [POINTER_TYPE]: Fix pointer-to-function handling.
17627
        [ARRAY_TYPE]: Don't try to print an unknown dimension.
17628
 
17629
        * tree-simple.c (is_simple_arraybase): New function.
17630
        (is_simple_arrayref): Use it to check the array base again.
17631
        * tree-simple.h: Add declaration.
17632
        * c-simplify.c (simplify_array_ref): Do simplify the base.
17633
        * expr.c (expand_expr): First make sure the type has a size.
17634
 
17635
2002-06-07  Jason Merrill  
17636
 
17637
        * cppexp.c (num_equality_op): Use a temporary variable to work
17638
        around gcc 3.0.4 bug.
17639
 
17640
2002-06-05  Diego Novillo  
17641
 
17642
        * Makefile.in (BOOT_CFLAGS): Remove -ftree-ssa.
17643
        * c-decl.c (c_expand_body): Call optimize_function_tree if tree SSA
17644
        is enabled.
17645
        * c-lang.c (LANG_HOOKS_SIMPLIFY_FUNCTION_TREE): Define.
17646
        * c-simplify.c (simplify_tree): Rename to c_simplify_function_tree.
17647
        Update all callers.
17648
        Dump function body before and after simplification if
17649
        -fdump-tree-simple is used.
17650
        (simplify_expr): Document FIXME for simplification of BIT_FIELD_REF
17651
        nodes.
17652
        * c-tree.h (simplify_tree): Rename to c_simplify_function_tree.
17653
        * langhooks-def.h (LANG_HOOKS_SIMPLIFY_FUNCTION_TREE): Define
17654
        (LANGHOOKS_INITIALIZER): Add LANG_HOOKS_SIMPLIFY_FUNCTION_TREE.
17655
        (lhd_simplify_function_tree): Declare.
17656
        * langhooks.c (lhd_simplify_function_tree): New function.
17657
        * langhooks.h (lang_hooks): Add simplify_function_tree function
17658
        pointer.
17659
        * toplev.c (parse_options_and_default_flags): Set flag_tree_ssa to
17660
        1 at optimization levels >= 1.
17661
        Revert to default warning when -Wuninitialized is used without -O.
17662
        * tree-cfg.c (tree_find_basic_blocks): Rename argument 't' to
17663
        'fnbody'.
17664
        * tree-optimize.c: Include langhooks.h.
17665
        (optimize_tree): Rename to optimize_function_tree.  Update all
17666
        users.
17667
        Rename argument 't' to 'fndecl'.
17668
        Call simplify langhook before building SSA.
17669
        (build_tree_ssa): Rename argument 't' to 'fndecl'.
17670
        Adjust call to tree_find_basic_blocks to pass body of the function.
17671
        * tree-optimize.h (optimize_tree): Rename to
17672
        optimize_function_tree.
17673
        * tree-simple.c (is_simple_unary_expr): Document FIXME on
17674
        BIT_FIELD_REF nodes.
17675
        * tree-ssa.c: Add whitespace.
17676
        * testsuite/lib/c-torture.exp: Remove -ftree-ssa flag.
17677
 
17678
2002-06-03  Daniel Berlin  
17679
 
17680
        * tree-cfg.c (insert_before_*):  For insertion into FOR_INIT's, if
17681
        we have an expression statement, transform into a compound
17682
        expression.
17683
        Pick the right place to insert a statement by iterating until we
17684
        have a first_exec_stmt (first_non_decl_stmt) that is really the
17685
        first executable non decl statement.
17686
        (insert_after_*): Ditto.
17687
 
17688
2002-06-03  Daniel Berlin  
17689
 
17690
        * tree-ssa-pre.c: Update BB stuff to new basic block structure.
17691
        Add some comments throughout (more coming, particularly describing
17692
        the algorithm, rather than the implementation).
17693
        (free_expr_info): Free refs as well.
17694
        (defs_y_dom_x): Handle unary expressions as well.
17695
        (insert_euse_in_preorder_dt_order_1): Use block of ref, not block
17696
        of statement.
17697
        Don't insert exit blocks if we hit them before hitting an
17698
        occurrence (it's pointless).
17699
        (rename_2): Return set of phi operands we touched, don't forget to
17700
        free VARRAY's we allocated.
17701
        (rename_1): Correct downsafety computation. Now get exact same
17702
        results as Open64.
17703
        Correct setting of has_real_use.
17704
        (finalize_1): Fix up insertion.
17705
        (code_motion): Fix up insertion.
17706
 
17707
        * tree-dfa.c (dump_varref):  Improve dumping of expression
17708
        references.
17709
 
17710
2002-06-03  Diego Novillo  
17711
 
17712
        * tree-cfg.c (delete_bb): Rename to tree_delete_bb.  Update callers.
17713
        (tree_find_basic_blocks): Initializer last_basic_block.
17714
        (create_bb): Update last_basic_block after creating a new block.
17715
        (tree_cleanup_cfg): Delete unreachable blocks by traversing the
17716
        linked list, not the array.  Update comments.
17717
        (delete_bb): Update comments.
17718
        (tree_dump_cfg): Also show last_basic_block.
17719
        * tree-ssa.c (tree_build_ssa): Use last_basic_block instead of
17720
        n_basic_blocks to allocate dominator arrays.
17721
        (insert_phi_terms): Ditto.
17722
        (search_fud_chains): User FOR_EACH_BB to look for dominator
17723
        children.
17724
 
17725
2002-05-29  Diego Novillo  
17726
 
17727
        * tree-cfg.c (tree_find_basic_blocks): Set next_bb and prev_bb for
17728
        ENTRY_BLOCK_PTR and EXIT_BLOCK_PTR.
17729
        (create_bb): Set flag BB_NEW for every newly created block.
17730
        Call link_block to add the new block to the linked list.
17731
        (tree_split_bb): Traverse basic blocks using FOR_EACH_BB.
17732
        (make_goto_stmt_edges): Ditto.
17733
        (remove_unreachable_blocks): Add reminder comment to stop
17734
        compacting the basic block array every time a block is deleted.
17735
        (delete_cfg): Traverse basic blocks using FOR_EACH_BB.
17736
        (tree_dump_bb): Ditto.
17737
        (tree_dump_cfg): Ditto.
17738
        (tree_cfg2dot): Ditto.
17739
        * tree-dfa.c (tree_find_varrefs): Ditto.
17740
        (create_tree_ann): Ditto.
17741
        (get_fcalls): Ditto.
17742
        (find_declaration): Ditto.
17743
        * tree-ssa.c (tree_build_ssa): Ditto.
17744
 
17745
2002-05-28  Diego Novillo  
17746
 
17747
        * Makefile.in: Add -ftree-ssa to BOOT_CFLAGS.
17748
 
17749
2002-05-27  Diego Novillo  
17750
 
17751
        * c-decl.c (c_expand_body): Close dump file before simplifying the
17752
        function.
17753
        * c-pretty-print.c (dump_c_node): Handle COMPLEX_CST,
17754
        BIT_FIELD_REF, COMPLEX_EXPR, CONJ_EXPR, REALPART_EXPR,
17755
        IMAGPART_EXPR and VA_ARG_EXPR nodes.
17756
        Display all type casts, not just pointer casts.
17757
        (op_prio): Handle LROTATE_EXPR, RROTATE_EXPR, REALPART_EXPR and
17758
        IMAGPART_EXPR.
17759
        * c-simplify.c: Include "tree-inline.h"
17760
        (dump_file): New local variable.
17761
        (dump_flags): New local variable.
17762
        (stmt_expr_level): New local variable.
17763
        (simplify_tree): Open and close dump file if
17764
        -fdump-tree-simple-details is given.
17765
        Initialize stmt_expr_level.
17766
        (simplify_stmt): Dump statement before and after simplification if
17767
        -fdump-tree-simple-detail is given.
17768
        Unshare the expression of an EXPR_STMT before simplifying it.
17769
        Call simplify_return_stmt to handle RETURN_STMT nodes.
17770
        Do not simplify DECL_STMT nodes.
17771
        Call stmt_has_effect before re-chaining side effects.
17772
        (simplify_for_stmt): Do not return the simplified statement.
17773
        Update all callers.
17774
        Simplify FOR_BODY after the headers.
17775
        Unshare loop header expressions before simplification.
17776
        (simplify_while_stmt): Do not return the simplified statement.
17777
        Update all callers.
17778
        Simplify WHILE_BODY after the headers.
17779
        Unshare the loop header expression before simplification.
17780
        (simplify_do_stmt): Do not return the simplified statement.  Update
17781
        all callers.
17782
        Unshare the loop header expression before simplification.
17783
        (simplify_if_stmt): Do not return the simplified statement.  Update
17784
        all callers.
17785
        Simplify the condition expression before the clauses.
17786
        Unshare the condition expression before simplification.
17787
        (simplify_switch_stmt): Do not return the simplified statement.
17788
        Update all callers.
17789
        Simplify the switch expression before the body.
17790
        Unshare the switch expression before simplification.
17791
        (simplify_decl_stmt): Remove.
17792
        (simplify_expr): Remove argument 'needs_lvalue'.
17793
        Add argument 'stmt'.
17794
        Replace first argument 'expr' with a pointer to the
17795
        expression 'expr_p'.
17796
        Do not return the simplified expression.
17797
        Update all callers and uses.
17798
        Handle TRUTH_NOT_EXPR nodes.  Simplify SAVE_EXPR nodes into a
17799
        SIMPLE id and remove the SAVE_EXPR node.
17800
        Do not simplify BIT_FIELD_REF nodes.
17801
        Remove code that tried to create new lvalues.
17802
        (simplify_array_ref): Replace first argument 'expr' with a pointer
17803
        to the expression 'expr_p'.
17804
        Do not return the simplified expression.
17805
        Add argument 'stmt'.
17806
        Update all callers and uses.
17807
        (simplify_self_mod_expr): Replace first argument 'expr' with a
17808
        pointer to the expression 'expr_p'.
17809
        Do not return the simplified expression.
17810
        Add argument 'stmt'.
17811
        Update all callers and uses.
17812
        Call simplify_lvalue_expr to simplify a copy of the LHS into an
17813
        lvalue for the new assignment.
17814
        Simplify the new binary expression.
17815
        (simplify_component_ref): Replace first argument 'expr' with a
17816
        pointer to the expression 'expr_p'.
17817
        Do not return the simplified expression.
17818
        Add argument 'stmt'.
17819
        Update all callers and uses.
17820
        (simplify_call_expr): Ditto.
17821
        (simplify_tree_list): Ditto.
17822
        (simplify_cond_expr): Ditto.
17823
        Build a replacement IF_STMT and call simplify_if_stmt() to process
17824
        it.  Set the line number of the new statement from the statement
17825
        containing the original expression.
17826
        (simplify_modify_expr): Replace first argument 'expr' with a
17827
        pointer to the expression 'expr_p'.
17828
        Do not return the simplified expression.
17829
        Add argument 'stmt'.
17830
        Update all callers.
17831
        Call simplify_lvalue_expr to simplify the LHS of the assignment.
17832
        (simplify_boolean_expr): Replace first argument 'expr' with a
17833
        pointer to the expression 'expr_p'.
17834
        Do not return the simplified expression.
17835
        Add argument 'stmt'.
17836
        Update all callers.
17837
        Build a new IF_STMT and simplify it all at once by calling
17838
        simplify_if_stmt.
17839
        (simplify_compound_expr): Replace first argument 'expr' with a
17840
        pointer to the expression 'expr_p'.
17841
        Do not return the simplified expression.
17842
        Add argument 'stmt'.
17843
        Update all callers.
17844
        (simplify_expr_wfl): Ditto.
17845
        (simplify_lvalue_expr): New function.
17846
        (add_tree): Create a copy of each expression before adding it to
17847
        the list.
17848
        (deep_copy_node): Call copy_tree_r to copy expression nodes.
17849
        (stmt_has_effect): Return nonzero if the statement may be the last
17850
        statement of a statement expression body.
17851
        (mostly_copy_tree_r): New function.
17852
        * tree-dump.c (dump_options): Add 'details'.
17853
        * tree-simple.c: Update documentation about ADDRESSOF expressions.
17854
        (is_simple_stmt): Test for SIMPLE values when checking return
17855
        statements.
17856
        Accept all DECL_STMT nodes.
17857
        (is_simple_compstmt): Return nonzero if T is NULL.  Do not test
17858
        DECL_STMT nodes
17859
        (is_simple_expr): Return nonzero if T is NULL.
17860
        (is_simple_rhs): Ditto.
17861
        (is_simple_modify_expr): Ditto.
17862
        (is_simple_modify_expr_lhs): Ditto.
17863
        (is_simple_binary_expr): Ditto.
17864
        (is_simple_cond_expr): Ditto.
17865
        (is_simple_unary_expr): Call STRIP_NOPS before testing T.
17866
        Always accept ADDR_EXPR nodes.
17867
        Always accept BIT_FIELD_REF nodes.
17868
        (is_simple_call_expr): Return nonzero if T is NULL.
17869
        (is_simple_const): Ditto.
17870
        (is_simple_val): Ditto.
17871
        (is_simple_compref): Ditto.
17872
        (is_simple_compref_lhs): Ditto.
17873
        (is_simple_cast): Ditto.
17874
        (is_simple_cast_op): Ditto.
17875
        (is_simple_id): Return nonzero if T is NULL.  Allow identifiers
17876
        wrapped inside NON_LVALUE_EXPR and EXPR_WITH_FILE_LOCATION nodes.
17877
        Allow real and imaginary parts of a complex variable.
17878
        Allow compound literals.
17879
        (is_simple_arrayref): Allow arrays of complex types.
17880
        * tree.h (TDF_DETAILS): Define.
17881
        * cp/pt.c (tsubst_template_parms): Check that 'parms' is non-NULL
17882
        before calling TMPL_PARMS_DEPTH.
17883
        * doc/invoke.texi: Document -fdump-tree-simple-details.
17884
 
17885
2002-05-10  Daniel Berlin  
17886
 
17887
        * c-pretty-print.c (dump_c_node): Print "" for
17888
        types, variables, etc that have no name, rather than printing
17889
        nothing.
17890
        Handle PMF's properly.
17891
        Print out structure initializers in a somewhat sensible way.
17892
        Print SAVE_EXPR () around SAVE_EXPRs.
17893
        (print_call_name): Handle EXPR_WITH_FILE_LOCATION.
17894
 
17895
2002-05-09  Daniel Berlin  
17896
 
17897
        * tree-dfa.c (dump_varref): Tree inlining generates variables with
17898
        no name. Don't crash on dumping varref's of them.
17899
 
17900
        * tree-inline.c (expand_call_inline): Generate a proper STMT_EXPR
17901
        (it was missing COMPOUND_STMT).
17902
 
17903
2002-05-08  Daniel Berlin  
17904
 
17905
        s/varref_type/treeref_type/g
17906
        s/create_varref/create_ref/g
17907
 
17908
        * tree-flow.h: Add EXPRPHI, EXPRUSE, EXPRKILL, EXPRINJ.
17909
        Add structures and macros for each.
17910
        Add tree_perform_ssapre prototype.
17911
 
17912
        * Makefile.in (C_AND_OBJC_OBJS): Add tree-ssa-pre.o
17913
        (tree-ssa-pre.o): Add dependencies for tree-ssa-pre.o
17914
 
17915
        * cp/Make-lang.in: Add tree-ssa-pre.o
17916
 
17917
        * flags.h: Add flag_tree_ssa_pre.
17918
 
17919
        * tree-ssa-pre.c: New file, SSA-PRE.
17920
 
17921
        * toplev.c: Add flag_tree_ssa_pre.
17922
        (lang_independent_options): Add tree-ssa-pre.
17923
 
17924
        * tree-dump.c (dump_files): Add ssapre dump.
17925
 
17926
        * tree-optimize.c (optimize_tree): Do SSAPRE if requested.
17927
 
17928
        * tree.h (dump_index): Add TDI_ssa_pre.
17929
 
17930
        * tree-dfa.c (create_ref): Add support for creating the EXPR*'s refs.
17931
        (dump_varref): Add support for dumping EXPR* refs.
17932
 
17933
        * tree-ssa.c (search_fud_chains): Add BB to VARDEF_PHI_CHAIN_BB.
17934
 
17935
2002-05-07  Diego Novillo  
17936
 
17937
        * c-pretty-print.c (op_prio): Handle ABS_EXPR.
17938
        Don't abort when the operand is not recognized.
17939
        (op_symbol): Don't abort when the operand is not recognized.
17940
        * c-simplify.c (simplify_expr): Remove 'const' qualifier from first
17941
        argument.
17942
        Do not copy incoming expression.
17943
        Exclude handling of MODIFY_EXPR, INIT_EXPR, SAVE_EXPR and binary
17944
        expression nodes.
17945
        (simplify_array_ref): Remove 'const' qualifier from first argument.
17946
        Do not copy the incoming expression.
17947
        (simplify_self_mod_expr): Ditto.
17948
        Do not simplify the first operand twice.
17949
        (simplify_component_ref): Remove 'const' qualifier from first
17950
        argument.  Do not copy the incoming expression.
17951
        (simplify_call_expr): Ditto.
17952
        (simplify_tree_list): Ditto.
17953
        (simplify_cond_expr): Ditto.
17954
        (simplify_modify_expr): Ditto.
17955
        (simplify_boolean_expr): Ditto.
17956
        (simplify_compound_expr): Ditto.
17957
        (simplify_save_expr): Ditto.
17958
        (simplify_expr_wfl): Ditto.
17959
        (tree_build_scope): Re-write.  Do nothing if block already contains
17960
        a scope.  Use chainon to chain the body with the scope closing
17961
        node.
17962
        (deep_copy_node): Do not check for NULL nodes.  Do not deep copy
17963
        declarations, types and constants.
17964
 
17965
2002-05-06  Daniel Berlin  
17966
 
17967
        * c-simplify.c (deep_copy_node): Don't copy DECL_STMT_DECL's.
17968
 
17969
2002-05-06  Daniel Berlin  
17970
 
17971
        * tree-simple.c (is_simple_compstmt): Don't post-initialize
17972
        statics or aggregate initializers.
17973
 
17974
        * c-simplify.c (simplify_decl_stmt): Ditto.
17975
 
17976
2002-05-06  Sebastian Pop  
17977
 
17978
        * Makefile.in (simple-break-elim.o, simple-goto-elim.o, tree-dchain.o):
17979
        Added.
17980
        * c-decl.c: Include tree-dchain.h
17981
        (c_expand_body): Add entry point to the goto, break elimination
17982
        after the simplification pass.
17983
        * simple-break-elim.c: New file.
17984
        * simple-goto-elim.c: New file.
17985
        * tree-dchain.h: New file.
17986
        * tree-dchain.c: New file.
17987
 
17988
2002-05-02  Diego Novillo  
17989
 
17990
        * c-simplify.c (simplify_expr): Constify first argument.
17991
        Always work on a copy of the input expression.
17992
        Do not simplify COMPOUND_LITERAL_EXPR nor CONSTRUCTOR nodes.
17993
        (simplify_array_ref): Constify first argument.  Always work on a
17994
        copy of the input expression.
17995
        (simplify_self_mod_expr): Ditto.
17996
        (simplify_component_ref): Ditto.
17997
        (simplify_call_expr): Ditto.
17998
        (simplify_tree_list): Ditto.
17999
        (simplify_cond_expr): Ditto.
18000
        When building the THEN_CLAUSE and ELSE_CLAUSE for the new IF_STMT,
18001
        create a scope for them and simplify the scope, not the expression.
18002
        (simplify_modify_expr): Constify first argument.  Always work on a
18003
        copy of the input expression.
18004
        (simplify_boolean_expr): Ditto.
18005
        (simplify_compound_expr): Ditto.
18006
        (simplify_save_expr): Ditto.
18007
        (simplify_expr_wfl): Ditto.
18008
        * tree-cfg.c (tree_find_basic_blocks): Update comments for
18009
        -fdump-tree-dot.
18010
        (tree_dump_cfg): Ditto.
18011
        * tree-dump.c (dump_files): Rename -fdump-tree-graphviz to
18012
        -fdump-tree-dot.
18013
        * tree-simple.c (is_simple_unary_expr): Do not handle &CONST
18014
        expressions.
18015
        Handle COMPOUND_LITERAL_EXPR and CONSTRUCTOR nodes.
18016
        (is_simple_const): Strip NOPS and handle &CONST expressions.
18017
        * tree.h (enum tree_dump_index): Remove references to GraphViz.
18018
        * doc/invoke.texi: Update documentation for -fdump-tree-dot.
18019
 
18020
2002-05-02  Sebastian Pop  
18021
 
18022
        * c-pretty-print.c (dump_c_node): Don't print declarations
18023
        from the SCOPE_STMT_BLOCK, use the DECL_STMT instead.
18024
 
18025
2002-04-30  Diego Novillo  
18026
 
18027
        * c-pretty-print.c (NIY): Display an error string instead of aborting.
18028
        (op_prio): Add support for COMPOUND_EXPR, TRUTH_XOR_EXPR, MIN_EXPR,
18029
        MAX_EXPR and NON_LVALUE_EXPR.
18030
        For EXPR_WITH_FILE_LOCATION nodes, return the priority of
18031
        the internal node.
18032
        (op_symbol): Add support for TRUTH_XOR_EXPR.
18033
        * c-simplify.c (simplify_stmt): Only remove null statements that
18034
        have been nullified by simplification.
18035
        Call debug_tree() dump unhandled tree nodes.
18036
        (simplify_for_stmt): Always deep-copy PRE_COND_S before adding it
18037
        to PRE_P.
18038
        (simplify_expr): When simplifying a MODIFY_EXPR node into an
18039
        rvalue, return operand 0.
18040
        Handle VA_ARG_EXPR, BIT_FIELD_REF and NON_LVALUE_EXPR nodes.
18041
        Treat TRUTH_AND_EXPR, TRUTH_OR_EXPR and TRUTH_XOR_EXPR nodes as
18042
        regular binary expressions.
18043
        Call debug_tree() to dump an unhandled expression.
18044
        (simplify_array_ref): Do not simplify the base of an array.
18045
        (simplify_call_expr): Do not simplify calls to builtins.
18046
        (simplify_cond_expr): Handle conditional expressions of type void.
18047
        (simplify_boolean_expr): Return 'T != 0' instead of 'T'.
18048
        (simplify_save_expr): Do not wrap statement trees inside SAVE_EXPR
18049
        nodes.
18050
        (tree_last_decl): Ignore FILE_STMT nodes preceding a SCOPE_STMT.
18051
        * tree-simple.c: Update grammar to accept any valid C array as the
18052
        array base.
18053
        (is_simple_compstmt): Accept DECL_INITIAL expressions for read-only
18054
        variables.
18055
        (is_simple_expr): Do not abort if the incoming tree is NULL.
18056
        (is_simple_modify_expr): Allow SAVE_EXPR, EXPR_WITH_FILE_LOCATION
18057
        and NON_LVALUE_EXPR wrappers.
18058
        (is_simple_binary_expr): Ditto.
18059
        (is_simple_condexpr): Ditto.
18060
        Accept TRUTH_AND_EXPR, TRUTH_OR_EXPR and TRUTH_XOR_EXPR.
18061
        (is_simple_unary_expr): Do not abort it the incoming tree is NULL.
18062
        Allow SAVE_EXPR, EXPR_WITH_FILE_LOCATION and NON_LVALUE_EXPR
18063
        wrappers.
18064
        Handle BIT_FIELD_REF and VA_ARG_EXPR nodes.
18065
        (is_simple_call_expr): Always return 1 for builtin calls.
18066
        (is_simple_arrayref): Do not check the array base.
18067
 
18068
2002-04-30  Daniel Berlin  
18069
 
18070
        * c-simplify.c (simplify_call_expr): Don't try to simplify
18071
        call_expr arglist if it's not there.
18072
 
18073
2002-04-27  Diego Novillo  
18074
 
18075
        * c-decl.c (c_expand_body): Call simplify_tree to simplify a
18076
        FUNCTION_DECL node.
18077
        * c-simplify.c (simplify_tree): New function.
18078
        (simplify_stmt): Remove variable 'new_vars'.  Update all called
18079
        functions.
18080
        Remove argument 'scope'.  Update all callers.
18081
        Do not keep track of new scope statements as they are entered.
18082
        Do not call declare_tmp_vars().
18083
        (simplify_for_stmt): Remove argument new_vars_p.  Update all callers.
18084
        (simplify_while_stmt): Ditto.
18085
        (simplify_do_stmt): Ditto.
18086
        (simplify_if_stmt): Ditto.
18087
        (simplify_switch_stmt): Ditto.
18088
        (simplify_decl_stmt): Reformat comments.
18089
        (simplify_expr): Remove argument new_vars_p.  Update all callers.
18090
        Call simplify_save_expr() to simplify SAVE_EXPR nodes.
18091
        Call simplify_expr_wfl() to simplify EXPR_WITH_FILE_LOCATION nodes.
18092
        Do not call is_unop() and is_binop() when checking for unary and
18093
        binary operators.
18094
        Do not return early after simplify statement-expressions.
18095
        Do not call add_modify_stmt() to create assignment expressions.
18096
        (simplify_array_ref): Remove argument new_vars_p.  Update all callers.
18097
        (simplify_self_mod_expr): Ditto.
18098
        (simplify_component_ref): Ditto.
18099
        (simplify_call_expr): Ditto.
18100
        (simplify_tree_list): Ditto.
18101
        (simplify_cond_expr): Ditto.
18102
        (simplify_modify_expr): Ditto.
18103
        (simplify_boolean_expr): Ditto.
18104
        (simplify_compound_expr): Ditto.
18105
        (simplify_save_expr): New function.
18106
        (simplify_expr_wfl): New function.
18107
        (tree_build_scope): Reformat.
18108
        (add_tree): Call stmt_has_effect() and expr_has_effect() to decide
18109
        whether or not to add a new tree to the list.
18110
        (add_modify_stmt): Remove.
18111
        (create_tmp_var): Remove 'new_vars_p' argument.
18112
        Call pushdecl() to insert the newly created variable in the current
18113
        binding scope.
18114
        (declare_tmp_vars): Do not create a BLOCK_VARS for the scope.
18115
        (is_binop): Remove.
18116
        (is_unop): Remove.
18117
        (expr_has_effect): New function.
18118
        * c-tree.h (simplify_tree): Remove second argument.
18119
        * stmt.c (warn_if_unused_value): Check operand 0 of SAVE_EXPR
18120
        nodes.
18121
        * tree-dfa.c (find_refs_in_expr): Call find_refs_in_expr() to look
18122
        inside an EXPR_WITH_FILE_LOCATION node.
18123
        * tree-simple.c (is_simple_stmt): Add a case for SCOPE_STMT nodes.
18124
        (is_simple_compstmt): Assume that T is the first tree in the
18125
        compound statement's body.
18126
        Stop when a scope ending SCOPE_STMT node is found.
18127
        (is_simple_binary_expr): Don't call is_simple_binop().
18128
        (is_simple_condexpr): Don't call is_simple_relop().
18129
        (is_simple_binop): Remove.
18130
        (is_simple_relop): Remove.
18131
        (is_simple_unary_expr): Accept any operator with tree code class
18132
        '1' followed by a simple value.
18133
        Accept simple unary expressions wrapped inside SAVE_EXPR,
18134
        EXPR_WITH_FILE_LOCATION and NON_LVALUE_EXPR nodes.
18135
        (is_simple_id): Accept simple identifiers wrapped inside SAVE_EXPR,
18136
        EXPR_WITH_FILE_LOCATION and NON_LVALUE_EXPR nodes.
18137
        * tree-simple.h (create_tmp_var): Remove second argument.
18138
        (is_simple_binop): Remove.
18139
        (is_simple_relop): Remove.
18140
 
18141
2002-04-22  Diego Novillo  
18142
 
18143
        * c-simplify.c (stmt_has_effect): New function.
18144
        (simplify_stmt): Fix example code in comment.
18145
        Use EXPR_STMT_EXPR to access the expression in an expression
18146
        statement.
18147
        Call debug_c_node to display unhandled statements.
18148
        Call stmt_has_effect to determine whether the statement has been
18149
        nullified by the simplification process.
18150
        (simplify_for_stmt): Do not simplify the initialization expression
18151
        if it's NULL.
18152
        Do not convert post_cond_s into a statement chain.
18153
        Do not simplify the expression if it's NULL.
18154
        (simplify_switch_stmt): initialize post_cond_s to NULL before
18155
        simplifying the expression.
18156
        (simplify_expr): Rename argument IS_LHS to NEEDS_LVALUE.  Update
18157
        all uses.
18158
        When simplifying assignments, return the LHS of the assignment if
18159
        the caller wants to use the assignment as an rvalue.
18160
        Do not simplify ADDR_EXPR nodes.
18161
        Handle NOP_EXPR, CONVERT_EXPR, FIX_TRUNC_EXPR, FIX_CEIL_EXPR,
18162
        FIX_ROUND_EXPR, INDIRECT_REF, NEGATE_EXPR, INTEGER_CST, STRING_CST,
18163
        COMPLEX_CST.
18164
        Abort if the expression has not been simplified and cannot be used
18165
        as an rvalue to assign it to a temporary.
18166
        When creating a new temporary to hold an lvalue, if the expression
18167
        is an indirect reference, use the address of the referenced object.
18168
        When creating an indirect reference, use the pointed-to type as the
18169
        type of the reference.
18170
        (simplify_self_mod_expr): If the LHS operand needs to be
18171
        simplified, simplify twice.  Once to produce an lvalue and another
18172
        to produce a simple value.
18173
        (simplify_modify_expr): Break assignment chains (a = b = c = ...)
18174
        into individual assignments.
18175
        (simplify_compound_expr):
18176
        (create_tmp_var): If the type is an array, use TYPE_POINTER_TO as
18177
        the pointer type.
18178
        (update_line_number): Fix typo in comment.
18179
        (is_unop): Ditto.
18180
        (convert_to_stmt_chain): Only add statements that comply with
18181
        stmt_has_effect().
18182
        * tree-dfa.c (find_declaration): Fix typo in comment.
18183
        (debug_varref): Ditto.
18184
        * tree-flow.h: Ditto.
18185
        * tree-simple.c (is_simple_stmt): New function.
18186
        (is_simple_compstmt): New function.
18187
        (is_simple_expr): Fix typo in comment.
18188
        (is_simple_rhs): Allow conditional expressions.
18189
        (is_simple_modify_expr): Fix typo in comment.
18190
        (is_simple_modify_expr_lhs): Ditto.
18191
        (is_simple_binary_expr): Ditto.
18192
        (is_simple_condexpr): Ditto.
18193
        (is_simple_relop): Ditto.
18194
        (is_simple_unary_expr): Ditto.
18195
        Allow taking the address of a constant (for strings).
18196
        (is_simple_call_expr): Fix typo in comment.
18197
        Call is_simple_id to determine if the first operand is a SIMPLE
18198
        function identifier.
18199
        (is_simple_arglist): Fix typo in comment.
18200
        (is_simple_varname): Ditto.
18201
        (is_simple_const): Don't accept casts of SIMPLE constants.
18202
        (is_simple_id): Don't accept casts of SIMPLE identifiers.
18203
        (is_simple_val): Fix typo in comment.
18204
        (is_simple_arrayref): Ditto.
18205
        (is_simple_compref): Ditto.
18206
        (is_simple_compref_lhs): Ditto.
18207
        (is_simple_cast_op): Ditto.
18208
        (is_simple_exprseq): Allow NULL expression sequences.
18209
        * tree-simple.h (is_simple_stmt): Declare
18210
        (is_simple_compstmt): Declare.
18211
        * tree-ssa.c (follow_chain): Fix typo in comment.
18212
 
18213
2002-04-22  Diego Novillo  
18214
 
18215
        * c-pretty-print.c (dump_c_node): Don't print function
18216
        bodies of FUNCTION_DECL nodes.
18217
 
18218
2002-04-19  Andreas Jaeger  
18219
 
18220
        * Makefile.in (c-call-graph.o): New.
18221
 
18222
2002-04-18  Sebastian Pop  
18223
 
18224
        * c-pretty-print.c (PRINT_FUNCTION_NAME): Define.
18225
        (dump_c_node): Call pretty_print_string to print string.
18226
        Call print_call_name to print function names.
18227
        (pretty_print_string): New function.
18228
        (print_call_name): New function.
18229
 
18230
2002-04-17  Diego Novillo  
18231
 
18232
        * c-simplify.c (simplify_do_stmt): Call is_simple_condexpr to test
18233
        if the conditional is in SIMPLE form.
18234
        (simplify_if_stmt): Ditto.
18235
 
18236
2002-04-17  Diego Novillo  
18237
 
18238
        * c-pretty-print.c (dump_c_node): Handle escape sequences in strings.
18239
        (op_symbol): Handle TRUTH_NOT_EXPR.
18240
        * c-simplify.c: Rename 'after' with 'post' and 'before' with 'pre'
18241
        everywhere.
18242
        Re-group some functions and add comments.
18243
        (simplify_stmt): Update calls to simplify_for_stmt,
18244
        simplify_while_stmt, simplify_do_stmt and simplify_switch_stmt.
18245
        Call simplify_if_stmt.
18246
        Do not test if expression is in SIMPLE form before calling
18247
        simplify_expr.
18248
        Call convert_to_stmt_chain to emit statement trees for side effects
18249
        found while simplifying.
18250
        (simplify_for_stmt): Re-implement.  Do not change structure of the
18251
        statement.  Simplify each header expression and emit side effects
18252
        at sequence points.
18253
        (simplify_while_stmt): Ditto.
18254
        (simplify_do_stmt): Ditto.
18255
        (simplify_switch_stmt): Ditto.
18256
        (new_simplified_if): Rename to simplify_if_stmt.
18257
        Call simplify_expr to simplify the conditional.
18258
        (simplify_if_stmt): New name for new_simplified_if.
18259
        (simplify_expr): Do not default simple_test_f to is_simple_expr.
18260
        If simple_test_f is not set, abort.
18261
        Handle COMPOUND_EXPR, MODIFY_EXPR, TRUTH_ANDIF_EXPR,
18262
        TRUTH_ORIF_EXPR, SAVE_EXPR and EXPR_WITH_FILE_LOCATION.
18263
        (simplify_arglist): Rename to simplify_tree_list.
18264
        (simplify_tree_list): New name for simplify_arglist.
18265
        (simplify_boolean_expr): New function.
18266
        (simplify_compound_expr): New function.
18267
        (tree_build_scope): Use SCOPE_BEGIN_P instead of TREE_LANG_FLAG_0
18268
        to access scope operands.  Use COMPOUND_BODY instead of
18269
        TREE_OPERAND to access the body of the compound statement.
18270
        (add_tree): Use a TREE_LIST container instead of directly chaining the
18271
        trees.
18272
        (add_assignment_tree): Rename to add_modify_stmt.  Update all
18273
        callers.
18274
        (add_modify_stmt): New name for add_assignment_tree.
18275
        (insert_before_continue_end): Do nothing it the tree to insert is
18276
        NULL.
18277
        (copy_stmt_chain): Rename to deep_copy_list.  Update all callers.
18278
        (deep_copy_list): New name for copy_stmt_chain.
18279
        (copy_stmt): Rename to deep_copy_node.  Update all callers.
18280
        (deep_copy_node): New name for copy_stmt.  Handle TREE_LIST
18281
        trees.
18282
        (insert_before_first): New function.
18283
        (is_binop): Add COMPOUND_EXPR.
18284
        (convert_to_stmt_chain): New function.
18285
        * tree-cfg.c (make_for_stmt_blocks): Fix comment.
18286
        * tree-simple.c (is_simple_condexpr): New function.
18287
        (is_simple_const): Allow casts of SIMPLE constants.
18288
        (is_simple_id): Allow casts of SIMPLE identifiers.
18289
        (is_simple_cast): Call is_simple_cast_op.
18290
        (is_simple_cast_op): New function.
18291
        (is_simple_exprseq): New function.
18292
        * tree-simple.h (deep_copy_list): Declare.
18293
        (deep_copy_node): Declare.
18294
        (is_simple_cast_op): Declare.
18295
        (is_simple_exprseq): Declare.
18296
 
18297
2002-04-03  Diego Novillo  
18298
 
18299
        * c-simplify.c (simplify_expr): Add arguments simple_tree_f and
18300
        is_lhs.  Update all callers.
18301
        Call simplify_call_expr, simplify_cond_expr, simplify_arglist and
18302
        simplify_modify_expr.
18303
        Call is_unop and is_binop to check for unary and binary operators.
18304
        (simplify_binary_expr): Remove.
18305
        (simplify_call_expr): New function.
18306
        (simplify_arglist): New function.
18307
        (simplify_cond_expr): New function.
18308
        (simplify_modify_expr): New function.
18309
        (keep_stmt_p): Remove.
18310
        (is_binop): New function.
18311
        (is_unop): New function.
18312
        (simplify_stmt): Don't call keep_stmt_p.
18313
        (simplify_decl_stmt): Call add_assignment_tree.
18314
        * tree-simple.c: Include c-tree.h
18315
        Add expression-statements to the SIMPLE grammar.
18316
        (is_simple_modify_expr_lhs): New function.
18317
        (is_simple_modify_expr): Call it.
18318
        (is_simple_relop): Update comment.
18319
        (is_simple_unary_expr): Allow expression-statements.
18320
        (is_simple_arglist): New function.
18321
        (is_simple_call_expr): Call it.
18322
        (is_simple_id): Accept expressions taking the address of a
18323
        function.
18324
        * tree-simple.h (is_simple_modify_expr_lhs): Declare.
18325
        (is_simple_arglist): Declare.
18326
 
18327
2002-03-21  Diego Novillo  
18328
 
18329
        * Makefile.in (c-simplify.o): Add dependency on varray.h.
18330
        * c-simplify.c: Include varray.h.
18331
        Remove comments with SIMPLE grammar.
18332
        (simplify_array_ref): New.
18333
        (simplify_self_mod_expr): New.
18334
        (simplify_component_ref): New.
18335
        (add_assignment_tree): New.
18336
        (simplify_expr): Call simplify_array_ref to simplify array
18337
        references.
18338
        Call simplify_self_mod_expr to simplify ++, --, += and -=
18339
        expressions.
18340
        Call simplify_component_ref to simplify references to structures.
18341
        (simplify_binary_expr): Do not check whether the expression is
18342
        already in SIMPLE form.
18343
        * tree-simple.c: Document changes from original SIMPLE grammar.
18344
        (is_simple_unary_expr): Add check for *ID.
18345
        (is_simple_call_expr): Update comments.
18346
        (is_simple_const): Ditto.
18347
        (is_simple_id): Do not accept *ID expressions.
18348
        (is_simple_val): Update comments.
18349
        (is_simple_arrayref): Accept any variable name as the base address.
18350
        (is_simple_compref_lhs): New.
18351
        (is_simple_compref): Call it.
18352
        * tree-simple.h (is_simple_compref_lhs): Declare.
18353
 
18354
2002-03-18  Diego Novillo  
18355
 
18356
        * Makefile.in (C_AND_OBJC_OBJS): Add tree-simple.o
18357
        (tree-simple.o): New rule.
18358
        * c-simplify.c (simplified_p): Remove.
18359
        (simplified_rec_p): Remove.
18360
        (simplified_condition_p): Remove.
18361
        (simplify_for_stmt): Call is_simple_expr instead of
18362
        simplified_condition_p.
18363
        (simplify_while_stmt): Ditto.
18364
        (simplify_do_stmt): Call is_simple_expr instead of simplified_p.
18365
        (new_simplified_if): Call is_simple_expr instead of
18366
        simplified_rec_p.
18367
        (simplify_decl_stmt): Update comment.
18368
        (simplify_expr): Return the original expression if it's already
18369
        in SIMPLE form.
18370
        Do not special case most binary and unary expressions.
18371
        When simplifying array references, create temporary variables to
18372
        hold the base address for the array.
18373
        Simplify COMPONENT_REF expressions separately.
18374
        Call simplify_binary_expr to handle most binary expressions.
18375
        (simplify_binary_expr): New function.
18376
        (keep_stmt_p): Call is_simple_unary_expr to determine whether the
18377
        statement should be kept or not.
18378
        * tree-simple.c: New file.
18379
        * tree-simple.h (is_simple_expr): Declare.
18380
        (is_simple_rhs): Declare.
18381
        (is_simple_modify_expr): Declare.
18382
        (is_simple_binary_expr): Declare.
18383
        (is_simple_binop): Declare.
18384
        (is_simple_relop): Declare.
18385
        (is_simple_unary_expr): Declare.
18386
        (is_simple_call_expr): Declare.
18387
        (is_simple_const): Declare.
18388
        (is_simple_id): Declare.
18389
        (is_simple_varname): Declare.
18390
        (is_simple_val): Declare.
18391
        (is_simple_arrayref): Declare.
18392
        (is_simple_compref): Declare.
18393
        (is_simple_cast): Declare.
18394
        * cp/Make-lang.in (CXX_C_OBJS): Add tree-simple.o
18395
 
18396
2002-03-18  Diego Novillo  
18397
 
18398
        * tree-simple.h: New file.
18399
        * Makefile.in (c-simplify.o): Add dependency on tree-simple.h
18400
        * c-simplify.c: Reformat some comments.
18401
        (tree_last_decl): Declare.
18402
 
18403
2002-03-18  Sebastian Pop  
18404
 
18405
        * c-simplify.c (insert_stmt_chain): Delete.
18406
        (simplified_condition_p, insert_after_case_labels): New.
18407
        (simplify_stmt, simplify_for_stmt, simplify_while_stmt,
18408
        simplify_do_stmt, new_simplified_if, simplify_switch_stmt):
18409
        Returns a single node, generate a chain of statements to be executed
18410
        before the if, and a list of new variables.
18411
        (new_simplified_if): Simplify clauses.
18412
        (simplify_expr): Remove unused parameter scope.
18413
 
18414
2002-03-14  Sebastian Pop  
18415
 
18416
        * c-simplify.c (simplify_switch_stmt, simplify_expr): Add scope
18417
        parameter.
18418
        (simplify_while_stmt, simplify_do_stmt, simplify_for_stmt): Avoid
18419
        negating loop condition during simplification.
18420
        (new_simplified_if): Don't simplify the IF_BODY.
18421
        (copy_stmt_chain): Use copy_stmt.
18422
        (copy_stmt): New function.
18423
 
18424
2002-02-28  Sebastian Pop  
18425
 
18426
        * tree-dfa.c (find_refs_in_stmt): Changed if/else statements in
18427
        a switch.
18428
 
18429
2002-02-28  Sebastian Pop  
18430
 
18431
        * c-simplify.c (simplify_if_stmt): Deleted.
18432
        (new_simplified_if): New function.
18433
        (make_type_writable): New function.
18434
        (insert_before_continue_end): New function.
18435
        (insert_before_continue): New function.
18436
        (copy_stmt_chain): New function.
18437
        (insert_stmt_chain): New function.
18438
        (update_line_number): New function.
18439
        (simplified_p): New function.
18440
        (simplified_rec_p) New function.
18441
        (simplify_stmt): Modify the way to call simplification
18442
        of COMPOUND_STMT, FOR_STMT, WHILE_STMT, DO_STMT, IF_STMT,
18443
        and SCOPE_STMT in order to avoid to execute the code after
18444
        the switch.  Add FILE_STMT, LABEL_STMT, GOTO_STMT, ASM_STMT cases.
18445
        Simplified a little the code after the switch.
18446
        (simplify_for_stmt): Change functions parameters.
18447
        Add code to simplify the FOR_INIT_STMT, FOR_COND, FOR_EXPR.
18448
        (simplify_while_stmt): Change functions parameters.
18449
        Add code to simplify the WHILE_COND.
18450
        (simplify_do_stmt): Change functions parameters.
18451
        Add code to simplify the DO_COND.
18452
        (simplify_switch_stmt): Change functions parameters.
18453
        (simplify_expr): Remove scope parameter.
18454
        Avoid to introduce a new temporary variable for an expression
18455
        that is already simplified.
18456
        ([ARRAY|COMPONENT]_REF, COND_EXPR): Handle them apart.
18457
        (TRUTH_ANDIF_EXPR, TRUTH_ORIF_EXPR): Avoid to evaluate the second
18458
        operand if the value can be deduced from the first one.
18459
        (keep_stmt_p): Add some other cases in which we don't need to keep
18460
        a statement after its simplification.
18461
 
18462
2002-02-28  Sebastian Pop  
18463
 
18464
        * Makefile.in: Add c-call-graph.o dependence.
18465
        * c-call-graph.c: New file.
18466
        * c-decl.c (c_expand_body): Add an entry point for call-graph.
18467
        * tree-dump.c (dump_files): Add the flag dump-call-graph.
18468
        * tree.h (tree_dump_index): Add TDI_xml.
18469
 
18470
2002-02-28  Sebastian Pop  
18471
 
18472
        * c-pretty-print.c (dump_c_tree): Declare it extern.
18473
        (dump_c_node): Declare it extern.
18474
        (dump_c_scope_vars): Deleted, some code moved in print_declaration ().
18475
        (print_declaration): New function.
18476
        (print_function_decl): New function.
18477
        (print_struct_decl): New function.
18478
        (INDENT_PRINT_C_NODE): Deleted.
18479
        (INDENT): New macro.
18480
        (NIY): Define the macro body in a block.
18481
        (dump_c_node): Add dumping for TREE_PURPOSE operand in TREE_LIST.
18482
        [VOID|INTEGER|REAL|COMPLEX|VECTOR|ENUMERAL|BOOLEAN|CHAR]_TYPE nodes:
18483
        insert some code from print-tree.c:print_node_brief () in order to
18484
        stabilise the type printing.
18485
        [RECORD|UNION]_TYPE nodes: Don't print their contents by default,
18486
        move the existing code in print_struct_decl ().
18487
        [POSTDECREMENT|POSTINCREMENT]_EXPR: Print the operand in post postion.
18488
        [MIN|MAX|ABS]_EXPR: New code for printing these nodes.
18489
        FOR_STMT: Don't print the FOR_BODY if it is not present.
18490
        RETURN_STMT: Don't print the return expression for a void function.
18491
        ASM_STMT: New code for printing this node.
18492
        SCOPE_STMT: Use print_declaration instead of dump_c_scope_vars.
18493
        COMPOUND_LITERAL_EXPR: Add the node as not implemented yet.
18494
        (op_prio): Fix switch indent.
18495
        Add node EXPR_WITH_FILE_LOCATION with priority 16.
18496
        (op_symbol): Fix switch indent.
18497
 
18498
2002-01-25  Diego Novillo  
18499
 
18500
        * Makefile.in (c-pretty-print.o): Add dependency on errors.h.
18501
        * c-decl.c (c_expand_body): React to -ftree-dump-simple.
18502
        * c-pretty-print.c: Fix typo in header comment.
18503
        (NYI): Flush output buffer, dump the tree and abort.
18504
        (dump_c_node): Add unparsing code for ERROR_MARK, IDENTIFIER_NODE,
18505
        ARRAY_TYPE, UNION_TYPE, STRING_CST, CEIL_DIV_EXPR, FLOOR_DIV_EXPR,
18506
        ROUND_DIV_EXPR, TRUNC_MOD_EXPR, FLOOR_MOD_EXPR, ROUND_MOD_EXPR,
18507
        RDIV_EXPR, EXACT_DIV_EXPR, LROTATE_EXPR, RROTATE_EXPR,
18508
        BIT_ANDTC_EXPR, BIT_NOT_EXPR, UNORDERED_EXPR, SAVE_EXPR and
18509
        EXPR_WITH_FILE_LOCATION.
18510
        Unify unparsing code for common binary and unary expressions.
18511
        Handle indirect references like any other unary expression.
18512
        (dump_c_scope_vars): Remove unused variable 'context'.
18513
        Call dump_c_node to print the type.
18514
        (dump_c_indirect_ref): Remove.
18515
        (op_prio): New function.
18516
        (op_symbol): New function.
18517
        * c-simplify.c (simplify_stmt): Do not simplify a return
18518
        expression, only its second operand.
18519
        Fix capitalization in error message.
18520
        (simplify_expr): Add documentation.
18521
        Fix capitalization in error message.
18522
        * tree-dump.c (dump_files): Add entry for -fdump-tree-simple.
18523
        (dump_options): Add entry for -unparse.
18524
        * tree.h (TDI_simple): Define.
18525
        (TDF_UNPARSE): Define.
18526
        * doc/invoke.texi: Document -fdump-tree-simple.
18527
 
18528
2002-01-23  Sebastian Pop  
18529
 
18530
        * c-pretty-print.c: Clean C++ comments.
18531
        (debug_output_buffer): Remove declaration and definition.
18532
        * diagnostic.h (debug_output_buffer): Add declaration.
18533
        * diagnostic.c (debug_output_buffer): Add definition.
18534
 
18535
2002-01-21  Diego Novillo  
18536
 
18537
        * tree-dfa.c (find_refs_in_stmt): Fix capitalization in error
18538
        message.
18539
        (find_refs_in_expr): Ditto.
18540
 
18541
2002-01-20  Diego Novillo  
18542
            Sebastian Pop  
18543
 
18544
        * Makefile.in: Add c-simplify.o.
18545
        * cp/Make-lang.in: Ditto.
18546
        * c-decl.c (c_expand_body): Call simplify_stmt() before
18547
        calling optimize_tree().
18548
        * c-simplify.c: New file.
18549
        * c-tree.h (simplify_stmt): Declare.
18550
        (print_c_tree)
18551
        * tree-dfa.c (find_refs_in_stmt): Fix error message for unhandled
18552
        statement codes.
18553
 
18554
2002-01-20  Sebastian Pop  
18555
 
18556
        * Makefile.in: Add c-pretty-print.o.
18557
        * cp/Make-lang.in: Ditto.
18558
        * c-pretty-print.c: New file.
18559
        * c-tree.h (print_c_tree): Declare.
18560
        (print_c_node): Declare.
18561
        (debug_c_tree): Declare.
18562
        (debug_c_node): Declare.
18563
 
18564
2001-12-29  Diego Novillo  
18565
 
18566
        * c-lang.c (c_post_options): Move code to enable tree-ssa
18567
        if -Wuninitialized is used ...
18568
        * c-common.c (c_common_post_options): ... here.
18569
 
18570
2001-12-29  Diego Novillo  
18571
 
18572
        * Makefile.in (tree-optimize.o): Don't depend on c-common.h
18573
        * tree-cfg.c: Don't include c-tree.h.  Explain why we need to
18574
        include c-common.h.
18575
        * tree-dfa.c: Explain why we need to include c-common.h.
18576
        * tree-ssa.c: Ditto.
18577
        * tree-optimize.c: Don't include c-common.h
18578
 
18579
2001-12-21  Nathan Sidwell  
18580
 
18581
        Revert my patch of 2001-07-23 for the moment.
18582
 
18583
2001-10-15  Diego Novillo  
18584
 
18585
        * tree-dfa.c (create_varref): If the new reference is inside a
18586
        statement, add it to the list of references for that statement.
18587
 
18588
2001-10-14  Diego Novillo  
18589
 
18590
        * Merge from mainline:
18591
 
18592
        Tue Sep 11 11:37:52 CEST 2001  Jan Hubicka  
18593
 
18594
                * basic-block.h (cached_make_edge): New.
18595
                (make_edge): Remove first parameter.
18596
                * flow.c (cached_make_edge): Rename from make_edge; return
18597
                newly created edge; use obstack allocation.
18598
                (make_edge): New.
18599
                (flow_call_edges_add): Updaet make_edge call.
18600
                (add_noreturn_fake_exit_edges): Likewise.
18601
                (connect_infinite_loops_to_exit): Liekwise.
18602
                (make_label_edge, make_edges, find_sub_basic_blocks): Use
18603
                cached_make_edge.
18604
                * profile.c (branch_prob): Update make_edge call.
18605
                * ssa-dce.c (ssa_eliminate_dead_code): Likewise.
18606
 
18607
2001-10-14  Diego Novillo  
18608
 
18609
        * Makefile.in (tree-ssa.o): Remove dependency on flags.h.
18610
        (tree-optimize.o): Add dependency on flags.h.
18611
        * bb-reorder.c (fixup_reorder_chain): Update call to make_edge.
18612
        * c-lang.c (c_post_options): Set flag_tree_ssa if -Wuninitialized
18613
        is given.
18614
        * ifcvt.c (find_if_case_1): Update call to make_edge.
18615
        * toplev.c (toplev_main): Do not warn about -Wuninitialized without
18616
        -O if -ftree-ssa is used.
18617
        * tree-cfg.c (dot_dump_file): Remove.
18618
        (dot_dump_flags): Remove.
18619
        (cfg_dump_file): Rename to dump_file.
18620
        (cfg_dump_flags): Rename to dump_flags.
18621
        (remove_bb_ann): New function.
18622
        (tree_find_basic_blocks): Do not open dump files at the beginning
18623
        of the function.
18624
        Do not call delete_cfg.
18625
        Create annotations for ENTRY_BLOCK_PTR and EXIT_BLOCK_PTR.
18626
        (make_for_stmt_blocks): Update FOR_INIT_STMT_BB and FOR_COND_BB
18627
        when creating the header blocks.
18628
        Create the blocks for the loop body before the expression block.
18629
        (make_while_stmt_blocks): Update END_WHILE_BB when creating the
18630
        header blocks.
18631
        Create the blocks for the loop body before the end-while block.
18632
        (make_do_stmt_blocks): Update DO_COND_BB when creating header
18633
        blocks.
18634
        Create the blocks for the loop body before the block for DO_COND.
18635
        (create_bb): When creating loop header blocks, allocate space for
18636
        the header_blocks union.
18637
        Call create_bb_ann to create a new annotation.
18638
        (remove_bb_ann): New function.
18639
        (tree_split_bb): New function.
18640
        (make_edges): Remove first argument from call to make_edge,
18641
        make_ctrl_stmt_edges, make_exit_edges, make_for_stmt_edges,
18642
        make_while_stmt_edges, make_do_stmt_edges, make_if_stmt_edges,
18643
        make_goto_stmt_edges, make_break_stmt_edges and
18644
        make_continue_stmt_edges.
18645
        When creating edges for the default label, remove the fallthru edge
18646
        that was created for the associated SWITCH_STMT entry block.
18647
        Do not call delete_unreachable_blocks.
18648
        Call tree_cleanup_cfg.
18649
        (make_ctrl_stmt_edges): Remove first argument.
18650
        (make_exit_edges): Remove first argument.
18651
        If the last element of the block is an EXPR_STMT, assume that it is
18652
        the call to a non-returning function and make an edge to the exit
18653
        block.
18654
        Do not call make_return_stmt_edges.  Call make_edge directly.
18655
        (make_for_stmt_edges): Remove first argument.
18656
        Simplify the graph for infinite and zero-iteration loops.
18657
        (make_while_stmt_edges): Remove first argument.
18658
        Simplify the graph for infinite and zero-iteration loops.
18659
        (make_do_stmt_edges): Remove first argument.
18660
        Simplify the graph for infinite and one-iteration loops.
18661
        (make_if_stmt_edges): Remove first argument.
18662
        Simplify the graph for always-true and always-false conditionals.
18663
        (make_goto_stmt_edges): Remove first argument.
18664
        (make_break_stmt_edges): Remove first argument.
18665
        (make_continue_stmt_edges): Remove first argument.
18666
        (make_return_stmt_edges): Remove.
18667
        (tree_cleanup_cfg): New function.
18668
        (delete_unreachable_blocks): Do not react to -Wunreachable-code.
18669
        Write to dump file blocks that have been removed.
18670
        Call remove_edge.
18671
        (is_ctrl_altering_stmt): If the statement contains a call to a
18672
        non-returning function, return 1.
18673
        (delete_cfg): Call remove_bb_ann.  Also remove annotations for
18674
        ENTRY_BLOCK_PTR and EXIT_BLOCK_PTR.
18675
        (latch_block): Use WHILE_COND_BB instead of END_WHILE_BB.
18676
        (insert_stmt_tree_before): Use cfg_dump_file instead of dump_file.
18677
        (insert_before_ctrl_stmt): Ditto.
18678
        (insert_before_normal_stmt): Ditto.
18679
        (insert_stmt_tree_after): Ditto.
18680
        (insert_after_ctrl_stmt): Ditto.
18681
        (insert_after_normal_stmt): Ditto.
18682
        (replace_expr_in_tree): Ditto.
18683
        (insert_bb_before): Ditto.
18684
        * tree-dfa.c (tree_find_varrefs): Call find_refs_in_expr when the
18685
        tree is not a statement.
18686
        (find_refs_in_stmt): Update comments.
18687
        Do not deal with FOR_STMT and DO_STMT trees separately.
18688
        When processing VAR_DECLs, call find_refs_in_expr with the
18689
        declaration, not its initial value.
18690
        (find_refs_in_expr): When processing COMPONENT_REFs and ARRAY_REFs,
18691
        recurse using the same reference type that was given by the
18692
        original caller.
18693
        (create_varref): Insert new PHI terms at the beginning of the
18694
        BB_REFS array, not the end.
18695
        * tree-flow.h (struct for_header_blocks): Declare.
18696
        (union header_blocks): Declare.
18697
        (struct bb_ann_def): Add new field 'loop_hdr'.
18698
        (BB_ANN): Re-define so that it can be used as an lvalue.
18699
        (BB_PARENT): Ditto.
18700
        (BB_REFS): Ditto.
18701
        (BB_PREV_CHAIN): Ditto.
18702
        (BB_BINDING_SCOPE): Ditto.
18703
        (BB_LOOP_HDR): Define.
18704
        (FOR_INIT_STMT_BB): Redefine using BB_LOOP_HDR.
18705
        (FOR_COND_BB): Ditto.
18706
        (FOR_EXPR_BB): Ditto.
18707
        (DO_COND_BB): Ditto.
18708
        (END_WHILE_BB): New name for WHILE_COND_BB.
18709
        (tree_warn_uninitialized): Declare.
18710
        (tree_cleanup_cfg): Declare.
18711
        (tree_split_bb): Declare.
18712
        * tree-optimize.c: Include flags.h.
18713
        (init_tree_flow): New function.
18714
        (optimize_tree): Call build_tree_ssa instead of building SSA
18715
        in-place.
18716
        (build_tree_ssa): New function.
18717
        * tree-optimize.h (build_tree_ssa): Declare.
18718
        * tree-ssa.c: Don't include toplev.h
18719
        (tree_warn_uninitialized): Define.
18720
        (tree_compute_rdefs): Do not call is_upward_exposed.  Instead
18721
        traverse all the uses of each variable and warn if the use is
18722
        reached by the ghost definition.
18723
 
18724
2001-10-10  Graham Stott  
18725
 
18726
        * tree-cfg.c (create_bb): Add new binding_scope parameter which allows
18727
        the binding scope either to be explicitly specified if non-zero.
18728
        (make_blocks): Update call to create_bb.
18729
        (make_for_stmt_blocks): Ditto.
18730
        (make_while_stmt_blocks): Ditto.
18731
        (make_do_stmt_blocks): Ditto.
18732
        (make_if_stmt_blocks): Ditto.
18733
        (make_switch_stmt_blocks): Ditto.
18734
        (create_maximal_bb): Ditto.
18735
        (make_edges): If a statement expression is in the last basic
18736
        block create an edge to EXIT_BLOCK_PTR and not the next block.
18737
        (insert_before_normal_stmt): Pass the appropriate binding scope to
18738
        create_bb.
18739
 
18740
2001-10-01  Graham Stott  
18741
            Diego Novillo  
18742
 
18743
        * tree-optimize.c (optimize_tree): Early return if the program has
18744
        errors.
18745
 
18746
2001-09-30  Diego Novillo  
18747
 
18748
        * tree-optimize.c (optimize_tree): Compute reaching definitions
18749
        after building SSA.
18750
 
18751
2001-09-30  Diego Novillo  
18752
 
18753
        * tree-cfg.c (insert_after_ctrl_stmt): Remove unused argument.
18754
        (make_blocks): Pop top element from scope binding stack when an end
18755
        of scope statement is found.
18756
        (create_bb): Remove code for popping top element from scope binding
18757
        stack.
18758
        Do not push basic block 0 to initialize scope binding stack.
18759
        (insert_stmt_tree_after): Remove unused argument from call to
18760
        insert_after_ctrl_stmt.
18761
        (tree_dump_bb): Dump BB_BINDING_SCOPE if defined.
18762
        * doc/invoke.texi: Document debugging option -ftree-dump-ssa-rdefs.
18763
 
18764
2001-09-29  Diego Novillo  
18765
 
18766
        * Makefile.in (tree-ssa.o): Update dependencies.
18767
        (tree-cfg.o): Ditto.
18768
        (tree-optimize.o): Ditto.
18769
        * basic-block.h (BB_CONTROL_EXPR): Define.
18770
        (BB_CONTROL_ENTRY): Define.
18771
        * c-common.h (TDF_RDEFS): Define.
18772
        * c-dump.c (dump_option_value_in): Add entry for TDF_RDEFS.
18773
        * tree-cfg.c: Include flags.h and c-tree.h
18774
        (binding_stack): New local variable.
18775
        (delete_block): Rename to delete_bb.
18776
        (tree_find_basic_blocks): Initialize varray 'binding_stack'.
18777
        Call make_blocks with an additional argument.
18778
        Adjust size of varray 'basic_block_info' after building CFG.
18779
        (make_blocks): Add new argument prev_chain_p.
18780
        Update all callers and callees.
18781
        Create sub-graphs for statement-expressions.
18782
        Update prev_chain_p when accessing the next tree in the chain.
18783
        (make_for_stmt_blocks): Add new argument prev_chain_p.
18784
        Update all callers and callees.
18785
        Update flags for control header blocks with BB_CONTROL_ENTRY and/or
18786
        BB_CONTROL_EXPR.
18787
        (make_while_stmt_blocks): Ditto.
18788
        (make_do_stmt_blocks): Ditto.
18789
        (make_if_stmt_blocks): Ditto.
18790
        (make_switch_stmt_blocks): Ditto.
18791
        (create_maximal_bb): Add new argument prev_chain_p.
18792
        Update all callers and callees.
18793
        (create_bb): Add new argument prev_chain_p.
18794
        Push basic block 0 the first time into the binding scope stack.
18795
        Associate the new basic block to the binding scope at the top of
18796
        the binding stack.
18797
        Push new binding scopes when a SCOPE_BEGIN statement is found.
18798
        Pop the top binding scope when a SCOPE_END statement is found.
18799
        (make_edges): Handle statement expressions.
18800
        Handle case labels preceded by scope statements in switch
18801
        statements.
18802
        (make_for_stmt_edges): Use FOR_INIT_STMT_BB, FOR_COND_BB and
18803
        FOR_EXPR_BB to access the header basic blocks.
18804
        (delete_unreachable_blocks): Call delete_bb instead of
18805
        delete_block.
18806
        (delete_block): Rename to delete_bb.
18807
        (block_invalidates_loop): Use data references to find calls to
18808
        non-pure functions.
18809
        (is_ctrl_stmt): Reformat.
18810
        (loop_body): New function.
18811
        (set_loop_body): New function.
18812
        (stmt_starts_bb_p): Statement expression trees also start a new
18813
        basic block.
18814
        (delete_cfg): Call VARRAY_FREE to delete all the references in each
18815
        basic block.
18816
        (latch_block): Use FOR_EXPR_BB, WHILE_COND_BB and DO_COND_BB to
18817
        find out the latch block for the loop.
18818
        (last_exec_stmt): New function.
18819
        (is_exec_stmt): Scope statements that begin a scope are also
18820
        considered executables.
18821
        (is_statement_expression): New function.
18822
        (first_non_decl_stmt): New function.
18823
        (first_decl_stmt): New function.
18824
        (first_non_label_in_bb): New function.
18825
        (insert_stmt_tree_before): New function.
18826
        (insert_before_ctrl_stmt): New function.
18827
        (insert_before_normal_stmt): New function.
18828
        (insert_stmt_tree_after): New function.
18829
        (insert_after_ctrl_stmt): New function.
18830
        (insert_after_normal_stmt): New function.
18831
        (insert_after_loop_body): New function.
18832
        (replace_expr_in_tree): New function.
18833
        (find_expr_in_tree): New function.
18834
        (insert_bb_before): New function.
18835
        (tree_dump_bb): Display the contents of BB_PREV_CHAIN_P.
18836
        * tree-dfa.c (tree_find_varrefs): Use accessor macros for array
18837
        'referenced_symbols'.
18838
        (find_refs_in_stmt): Do not process error_mark_node trees.
18839
        Handle statement-expression nodes as any other statement tree.
18840
        Do not call find_refs_in_stmt_expr.
18841
        (find_refs_in_stmt_expr): Remove.
18842
        (add_ref_to_sym): Remove.
18843
        (add_ref_to_bb): Remove.
18844
        (find_refs_in_expr): Do not process error_mark_node trees.
18845
        ADDR_EXPR trees are not variable references except if used in a
18846
        CALL_EXPR node.
18847
        Handle EXPR_WITH_FILE_LOCATION nodes.
18848
        (create_varref): Remove variable 'is_new'.
18849
        Initialize data-flow arrays VARDEF_IMM_USES, VARDEF_RUSES,
18850
        VARDEF_PHI_CHAIN and VARUSE_RDEFS.
18851
        Do not call add_ref_to_sym and add_ref_to_bb.
18852
        (add_ref_symbol): Use accessor macros for varray
18853
        'referenced_symbols'.
18854
        (function_may_recurse_p): New function.
18855
        (get_fcalls): New function.
18856
        (find_declaration): New function.
18857
        (dump_varref): Handle NULL values of VARREF_EXPR.
18858
        Use VARDEF_PHI_CHAIN instead of VARPHI_CHAIN.
18859
        (dump_varref_list): Check if the list is NULL before traversing it.
18860
        * tree-flow.h (struct vardef): Add fields 'ruses', 'marked' and
18861
        'phi_chain'.
18862
        (VARDEF_RUSES): Define.
18863
        (VARDEF_MARKED): Define.
18864
        (VARDEF_PHI_CHAIN): Define.
18865
        (VARPHI_CHAIN): Remove.
18866
        (struct varphi): Remove.
18867
        (struct varuse): Add field 'rdefs'.
18868
        (VARUSE_RDEFS): Define.
18869
        (union varref_def): Remove field 'phi'.
18870
        (IS_GHOST_DEF): Define.
18871
        (IS_ARTIFICIAL_REF): Define.
18872
        (struct bb_ann_def): Add fields 'prev_chain_p' and 'binding_scope'.
18873
        (BB_PREV_CHAIN_P): Define.
18874
        (BB_BINDING_SCOPE): Define.
18875
        (FOR_INIT_STMT_BB): Define.
18876
        (FOR_COND_BB): Define.
18877
        (FOR_EXPR_BB): Define.
18878
        (WHILE_COND_BB): Define.
18879
        (DO_COND_BB): Define.
18880
        (IF_COND_BB): Define.
18881
        (CASE_COND_BB): Define.
18882
        (NREF_SYMBOLS): Define.
18883
        (REF_SYMBOL): Define.
18884
        (ADD_REF_SYMBOL): Define.
18885
        (FCALL_NON_PURE): Define.
18886
        (FCALL_PURE): Define.
18887
        (FCALL_BUILT_IN): Define.
18888
        (loop_body): Declare.
18889
        (set_loop_body): Declare.
18890
        (last_exec_stmt): Declare.
18891
        (is_statement_expression): Declare.
18892
        (first_non_decl_stmt): Declare.
18893
        (first_decl_stmt): Declare.
18894
        (first_non_label_in_bb): Declare.
18895
        (insert_stmt_tree_before): Declare.
18896
        (insert_stmt_tree_after): Declare.
18897
        (replace_expr_in_tree): Declare.
18898
        (find_expr_in_tree): Declare.
18899
        (insert_bb_before): Declare.
18900
        (function_may_recurse_p): Declare.
18901
        (get_fcalls): Declare.
18902
        (find_declaration): Declare.
18903
        (tree_compute_rdefs): Declare.
18904
        (analyze_rdefs): Declare.
18905
        (is_upward_exposed): Declare.
18906
        * tree-optimize.c (optimize_tree): Update name for varray
18907
        referenced_symbols.
18908
        Free varray referenced_symbols and call delete_ssa on exit.
18909
        * tree-ssa.c: Include flags.h, diagnostic.h and toplev.h.
18910
        (tree_build_ssa): Create ghost definitions before building FUD
18911
        chains.
18912
        (insert_phi_terms): Use accessor macros for 'referenced_symbols'.
18913
        Ignore ghost definitions when placing PHI terms.
18914
        (build_fud_chains): Call get_tree_ann to create an annotation for
18915
        the symbol if it doesn't already have one.
18916
        (search_fud_chains): Reformat comments.
18917
        Do not initialize varray VARDEF_IMM_USES.
18918
        If a successor basic block does not have references, continue on to
18919
        the next one, do not stop.
18920
        Do not initialize varray VARDEF_PHI_CHAIN.
18921
        (delete_ssa): New function.
18922
        (delete_refs): New function.
18923
        (tree_compute_rdefs): New function.
18924
        (analyze_rdefs): New function.
18925
        (follow_chain): New function.
18926
        (is_upward_exposed): New function.
18927
 
18928
2001-09-14  Diego Novillo  
18929
 
18930
        * tree-cfg.c (tree_find_basic_blocks): Remove call to
18931
        mark_critical_edges.
18932
        (create_maximal_bb): Do not create annotations for non-executable
18933
        statements.
18934
        (map_stmt_to_bb): Rename basic_block_ann with bb_ann.
18935
        (delete_cfg): Ditto.
18936
        (is_exec_stmt): Reformat.
18937
        (create_bb_ann): New function.
18938
        * tree-dfa.c (create_node): Remove.
18939
        (ref_symbols_list): Remove.
18940
        (create_tree_ann): Declare.
18941
        (referenced_symbols): Declare.
18942
        (tree_find_varrefs): Replace usage of linked lists with variable
18943
        arrays.
18944
        (create_varref): Remove second argument from call to
18945
        add_ref_symbol.
18946
        Update comments.
18947
        (add_ref_to_sym): Replace usage of linked lists with variable
18948
        arrays.
18949
        Declare static.
18950
        (add_ref_to_bb): Ditto.
18951
        (add_ref_symbol): Ditto.
18952
        (dump_varref_list): Ditto.
18953
        (debug_varref_list): Ditto.
18954
        (create_varref_list): Remove.
18955
        (push_ref): Remove.
18956
        (create_node): Remove.
18957
        (delete_varref_list): Remove.
18958
        (get_tree_ann): Call create_tree_ann if the tree doesn't have an
18959
        annotation already.
18960
        (create_tree_ann): New function.
18961
        * tree-flow.h (varref_list_def): Remove.
18962
        (vardef): Change type of field 'imm_uses' to 'varray_type'.
18963
        (varphi): Change type of field 'phi_chain' to 'varray_type'.
18964
        (varref_node_def): Remove.
18965
        (varref_node): Remove.
18966
        (VARREF_NODE_ELEM): Remove.
18967
        (VARREF_NODE_NEXT): Remove.
18968
        (VARREF_NODE_PREV): Remove.
18969
        (varref_list_def): Remove.
18970
        (varref_list): Remove.
18971
        (VARREF_LIST_FIRST): Remove.
18972
        (VARREF_LIST_LAST): Remove.
18973
        (tree_ann_def): Change type of field 'refs' to 'varray_type'.
18974
        (basic_block_ann_def): Rename to 'bb_ann_def'.
18975
        Change type of field 'refs' to 'varray_type'.
18976
        (basic_block_ann): Rename to 'bb_ann'.
18977
        (ref_symbols_list): Remove.
18978
        (referenced_symbols): Declare.
18979
        (add_ref_to_sym): Remove.
18980
        (add_ref_to_bb): Remove.
18981
        (add_ref_symbol): Remove.
18982
        (remove_ann_from_sym): Remove.
18983
        (create_varref_list): Remove.
18984
        (push_ref): Remove.
18985
        (delete_varref_list): Remove.
18986
        (debug_varref_list): Update argument type to be 'varray_type'.
18987
        (dump_varref_list): Ditto.
18988
        * tree-optimize.c: Include 'basic-block.h'.
18989
        (optimize_tree): Replace references to 'ref_symbols_list' with
18990
        'referenced_symbols'.
18991
        Remove call to delete_varref_list.
18992
        * tree-ssa.c (insert_phi_terms): Rename 'work_list' to
18993
        'work_stack'.
18994
        Use VARRAY_PUSH and VARRAY_TOP to access 'work_stack' instead of
18995
        maintaining the stack pointer in 'work_list_top'.
18996
        Remove code to grow 'work_stack'.
18997
        Remove references to 'work_list_top'.
18998
        Replace references to 'ref_symbols_list' with 'referenced_symbols'.
18999
        (build_fud_chains): Replace references to 'ref_symbols_list' with
19000
        'referenced_symbols'.
19001
        (search_fud_chains): If there are no variable references in the
19002
        basic block, return early.
19003
        Change usage of linked lists with variable arrays.
19004
 
19005
2001-09-07  Diego Novillo  
19006
 
19007
        * tree-cfg.c (tree_find_basic_blocks): Document how to traverse
19008
        trees inside a basic block.
19009
        (make_for_stmt_blocks): Make sure that there is always a block for
19010
        FOR_EXPR, even if the loop does not have an expression.
19011
        Create a separate block for FOR_INIT_STMT.
19012
        (make_while_stmt_blocks): Always create an "end_while" block.
19013
        (make_if_stmt_blocks): Do not store IF_COND in the header block of
19014
        an IF statement.
19015
        (make_for_stmt_edges): Create an edge from the block header to the
19016
        block for FOR_INIT_STMT.
19017
        Determine the first block of the loop body calling BB_FOR_STMT on
19018
        the first executable statement in the body.
19019
        Remove the special case for missing FOR_EXPR trees.
19020
        (make_while_stmt_edges): Create a back edge from the end_while
19021
        block to the header block.
19022
        Determine the first block of the loop body calling BB_FOR_STMT on
19023
        the first executable statement in the body.
19024
        (make_do_stmt_edges): Determine the first block of the loop body
19025
        calling BB_FOR_STMT on the first executable statement in the body.
19026
        (condition_block): Rename to latch_block.  Return the latch
19027
        block for the given loop header.
19028
        (make_continue_stmt_edges): Rename condition_block to
19029
        latch_block.
19030
        (successor_block): Ditto.
19031
        * tree-flow.h (condition_block): Rename to latch_block.
19032
 
19033
2001-09-06  Diego Novillo  
19034
 
19035
        * tree-dfa.c (tree_find_varrefs): Use TDF_REFS instead of TDF_VARREF.
19036
        * tree-flow.h (TDF_VARREF): Remove.
19037
 
19038
2001-09-04  Nathan Sidwell  
19039
 
19040
        * c-common.h (tree_dump_index): Add more comments.
19041
        (TDF_REFS): New dump flag.
19042
        * c-dump.c (dump_files): Name flags `tree' rather than `ast'.
19043
        (dump_option_value_info): New struct.
19044
        (dump_options): New array.
19045
        (dump_switch_p): Parse switch options symbolically.
19046
        * doc/invoke.texi (-fdump-ast): Rename to ...
19047
        (-fdump-tree): ... here. Document options are symbolic, and
19048
        not all are applicable. Combine ssa related flags into the other
19049
        tree dump flags.
19050
 
19051
2001-08-27  Diego Novillo  
19052
 
19053
        * Makefile.in (tree-ssa.o): Update dependencies.
19054
        (tree-cfg.o): Ditto.
19055
        (tree-dfa.o): Ditto.
19056
        (tree-optimize.o): Ditto.
19057
 
19058
2001-08-26  Diego Novillo  
19059
 
19060
        * Makefile.in (C_AND_OBJC_OBJS): Replace tree-opt.o with
19061
        tree-optimize.o.
19062
        (c-decl.o): Ditto.
19063
        (tree-ssa.o): Ditto.
19064
        (tree-cfg.o): Ditto.
19065
        (tree-dfa.o): Ditto.
19066
        (tree-opt.o): Ditto.
19067
        * c-decl.c: Replace tree-opt.h with tree-optimize.h.
19068
        (c_expand_body): Remove call to init_tree_opt.
19069
        * flow.c (flow_loop_dump): Do not display insn UIDs if this is not
19070
        an RTL basic block.
19071
        * tree-cfg.c: Replace tree-opt.h with tree-optimize.h.
19072
        (block_invalidates_loop): New local function.
19073
        (validate_loops): New function.
19074
        (tree_dump_bb): Display the loop depth of the block.
19075
        * tree-dfa.c: Replace tree-opt.h with tree-optimize.h.
19076
        * tree-flow.h (validate_loops): Declare.
19077
        * tree-opt.c: Rename to tree-optimize.c.
19078
        * tree-opt.h: Rename to tree-optimize.h.
19079
        * tree-optimize.c: Rename from tree-opt.c.
19080
        * tree-optimize.h: Rename from tree-opt.h.
19081
        * tree-ssa.c: Replace tree-opt.h with tree-optimize.h.
19082
        (tree_build_ssa): Call tree_dump_bb instead of tree_debug_bb.
19083
        * cp/Make-lang.in: Replace tree-opt.h with tree-optimize.h.
19084
 
19085
2001-08-20  Diego Novillo  
19086
 
19087
        * basic-block.h (basic_block): Remove field 'reachable'.
19088
        Add new field 'flags'.
19089
        (BB_REACHABLE): Define.
19090
        * c-common.h (tree_dump_index): Add TDI_cfg, TDI_dot, TDI_ssa.
19091
        * c-decl.c (c_decode_option): Skip '-f' prefix before calling
19092
        dump_switch_p.
19093
        * c-dump.c (dump_file_info): Add entries for -fdump-tree-cfg,
19094
        -fdump-tree-graphviz and -fdump-tree-ssa.
19095
        * flow.c (find_unreachable_blocks): Use BB_REACHABLE bit in bb->flags
19096
        instead of bb->reachable.
19097
        (delete_unreachable_blocks): Ditto.
19098
        * tree-cfg.c: Minor formatting changes throughout the file.
19099
        (DEBUG_TREE_FLOW): Remove.
19100
        (debug_tree_flow): Remove.
19101
        (cfg_dump_file): New local variable.
19102
        (dot_dump_file): New local variable.
19103
        (cfg_dump_flags): New local variable.
19104
        (dot_dump_flags): New local variable.
19105
        (tree_find_basic_blocks): Remove unused arguments.
19106
        Add code to react to -fdump-tree-cfg and -fdump-tree-graphviz.
19107
        Remove uses of DEBUG_TREE_FLOW.
19108
        (delete_unreachable_blocks): Use BB_REACHABLE bit in bb->flags
19109
        instead of bb->reachable.
19110
        (tree_dump_cfg): New.
19111
        (tree_debug_cfg): Call tree_dump_cfg().
19112
        (tree_cfg2dot): Accept a FILE pointer instead of a file name as
19113
        argument.
19114
        Name the graph with the current function name.
19115
        * tree-dfa.c: Minor formatting changes throughout the file.
19116
        (DEBUG_TREE_DFA): Remove.
19117
        (debug_tree_dfa): Remove.
19118
        (dump_file): New local variable.
19119
        (dump_flags): New local variable.
19120
        (tree_find_varrefs): Add code to react to -fdump-tree-ssa.
19121
        Remove uses of DEBUG_TREE_DFA.
19122
        (find_refs_in_expr): Remove uses of DEBUG_TREE_DFA.
19123
        (create_varref): Replace VARREF_BLOCK with VARREF_BB.
19124
        * tree-flow.h: Minor formatting changes throughout the file.
19125
        (VARREF_BLOCK): Rename to VARREF_BB.
19126
        (VARREF_NEXT): Remove.
19127
        (VARREF_PREV): Remove.
19128
        (TDF_VARREF): Define.
19129
        (tree_find_basic_blocks): Remove unused arguments.
19130
        (tree_dump_cfg): Declare.
19131
        (tree_cfg2dot): Change argument to FILE *.
19132
        * tree-opt.c: Minor formatting changes throughout the file.
19133
        (optimize_tree): Remove unused arguments in call to
19134
        tree_find_basic_blocks().
19135
        * tree-opt.h: Ditto.
19136
        * tree-ssa.c: Minor formatting changes throughout the file.
19137
        (DEBUG_TREE_SSA): Remove.
19138
        (debug_tree_ssa): Remove.
19139
        (dump_file): New local variable.
19140
        (dump_flags): New local variable.
19141
        (tree_build_ssa): Add code to react to -fdump-tree-ssa.
19142
        Remove uses of DEBUG_TREE_SSA.
19143
        (insert_phi_terms): Remove uses of DEBUG_TREE_SSA.
19144
        * doc/invoke.texi: Add documentation for -fdump-tree-cfg,
19145
        -fdump-tree-graphviz and -fdump-tree-ssa.
19146
        Replace existing references to -fdump-tree with -fdump-ast.
19147
 
19148
2001-08-10  Diego Novillo  
19149
 
19150
        * basic-block.h (basic_block): Add new field 'reachable'.
19151
        (expunge_block): Declare.
19152
        * flow.c (ENTRY_BLOCK_PTR): Initialize field 'reachable'.
19153
        (EXIT_BLOCK_PTR): Ditto.
19154
        (expunge_block): Remove static declaration.
19155
        (cleanup_cfg): Clear bb->aux on every basic block.
19156
        (find_unreachable_blocks): Use field 'reachable' when computing
19157
        reachability.
19158
        (delete_unreachable_blocks): Use field 'reachable'.
19159
 
19160
        * tree-cfg.c: Rename all instance of 'node' with 'block.
19161
        (get_successor_block): Rename to successor_block.
19162
        (make_compound_stmt_edges): Remove.
19163
        (make_switch_stmt_edges): Remove.
19164
        (delete_unreachable_blocks): New.
19165
        (delete_block): New.
19166
        (make_blocks): Add new argument 'compound_stmt'.  Do not include
19167
        COMPOUND_STMT trees in the flowgraph.
19168
        (make_for_stmt_blocks): Include FOR_INIT_STMT in the entry block of
19169
        the loop.
19170
        If FOR_COND does not exist, create a tree holding the constant 1.
19171
        Add new argument 'compound_stmt'.
19172
        (make_while_stmt_blocks): Include WHILE_COND in the entry block of
19173
        the loop.
19174
        Add new argument 'compound_stmt'.
19175
        (make_do_stmt_blocks): Add new argument 'compound_stmt'.
19176
        (make_if_stmt_blocks): Add new argument 'compound_stmt'.
19177
        Include IF_COND in the IF header block.
19178
        (make_switch_stmt_blocks): Add new argument 'compound_stmt'.
19179
        Include SWITCH_COND in the SWITCH header block.
19180
        (create_maximal_bb): Remove argument 'is_loop_header'.
19181
        Add new argument 'compound_stmt'.
19182
        Update all callers.
19183
        Return the newly created basic block instead of its last statement.
19184
        Update comments.
19185
        Do not store control flow altering statements in bb->exit_stmt.
19186
        Only add executable statements to the block.
19187
        Annotate with 'compound_stmt' each tree added to the block.
19188
        (create_bb): Do not update annotation 'is_loop_header'.
19189
        (make_edges): Remove naive reachability analysis.
19190
        When a label node is found, add an edge from the immediately
19191
        enclosing switch statement.
19192
        Call delete_unreachable_blocks() after adding all the edges.
19193
        (make_ctrl_stmt_edges): Do not consider COMPOUND_STMT trees.
19194
        Do nothing for SWITCH_STMT trees.
19195
        (make_exit_edges): Use bb->end_tree instead of BB_EXIT_STMT.
19196
        (make_for_stmt_edges): Remove code that added edges for the block
19197
        holding FOR_INIT_STMT.
19198
        Update comments.
19199
        Do not consider the case where FOR_COND is NULL.
19200
        Call first_exec_stmt() to determine if FOR_BODY is empty.
19201
        Only create an edge from expr_bb to cond_bb if FOR_EXPR is
19202
        non-null.
19203
        (make_while_stmt_edges): Remove code that added edges for the block
19204
        holding WHILE_COND.
19205
        Update comments.
19206
        Call first_exec_stmt() to determine if WHILE_BODY is empty.
19207
        (make_do_stmt_edges): Call first_exec_stmt() to determine if
19208
        DO_BODY is empty.
19209
        (make_if_stmt_edges): Remove code that added edges for the block
19210
        holding IF_COND.
19211
        Call first_exec_stmt() to determine if THEN_CLAUSE or ELSE_CLAUSE
19212
        are empty.
19213
        (make_switch_stmt_edges): Remove.
19214
        (make_goto_stmt_edges): Use bb->end_tree instead of BB_EXIT_STMT.
19215
        (make_break_stmt_edges): Use bb->end_tree instead of BB_EXIT_STMT.
19216
        Call switch_parent() and loop_parent() to determine if the
19217
        statement is inside an appropriate control structure.
19218
        (make_continue_stmt_edges): Use bb->end_tree instead of
19219
        BB_EXIT_STMT.
19220
        (make_return_stmt_edges): Ditto.
19221
        (get_successor_block): Rename to successor_block.
19222
        Call first_exec_stmt() to find the first executable statement in
19223
        TREE_CHAIN.
19224
        (is_ctrl_stmt): Do not consider COMPOUND_STMT trees.
19225
        (stmt_starts_bb_p): Ditto.
19226
        (stmt_ends_bb_p): Reformat comments.
19227
        (delete_cfg): Reformat comments.
19228
        (find_loop_parent): Rename to loop_parent.
19229
        (get_condition_block): Rename to condition_block.
19230
        Update to use new index numbers for control structure header
19231
        blocks.
19232
        (switch_parent): New.
19233
        (first_exec_stmt): New.
19234
        (is_exec_stmt): New.
19235
        (tree_cfg2dot): Reformat comments.
19236
        * tree-dfa.c (find_refs): Remove.
19237
        (find_refs_in_stmt): New
19238
        (find_refs_in_stmt_expr): New.
19239
        (tree_find_varrefs): Look for variables doing a CFG traversal
19240
        instead of the trees.  Remove both arguments.
19241
        (find_refs_in_expr): Add new argument 'bb'.
19242
        Update all recursive calls.
19243
        (create_varref): Abort if the basic block 'bb' is NULL.
19244
        (add_ref_to_sym): Reformat comments.
19245
        (add_ref_symbol): Ditto.
19246
        (delete_varref_list): Ditto.
19247
        * tree-flow.h (struct tree_ann_def): Add 'compound_stmt'.
19248
        (TREE_COMPOUND_STMT): New macro.
19249
        (struct basic_block_ann_def): Remove 'exit_stmt' and
19250
        'is_loop_header'.
19251
        (BB_EXIT_STMT): Remove.
19252
        (BB_IS_LOOP_HEADER): Remove.
19253
        * tree-opt.c (optimize_tree): Call tree_find_varrefs() with no
19254
        arguments.
19255
        Only build DFA and SSA information if n_basic_blocks is greater
19256
        than zero.
19257
        * tree-ssa.c: Rename all instances of 'node' with 'block'.
19258
        (tree_build_ssa): Reformat comments.
19259
        (insert_phi_terms): Ditto.
19260
 
19261
2001-08-01  Diego Novillo  
19262
 
19263
        * tree-cfg.c (USE_TREE_IL): Remove.
19264
        (make_back_edges): Remove.
19265
        (make_fallthru_edge): Remove.
19266
        (get_outermost_scope_block): Remove.
19267
        (is_last_block_of_loop): Remove.
19268
        (tree_find_basic_blocks): Do not return early if 'errorcount' is set.
19269
        (make_edges): Do not treat back edges as a separate case.
19270
        Do not call make_fallthru_edge to create fall-through edges.
19271
        Do not emit a warning for unreachable blocks containing a single
19272
        closing brace.
19273
        (make_do_stmt_edges): Update comment.
19274
        (make_goto_stmt_edges): Do not call get_outermost_scope_block().
19275
        (make_break_stmt_edges): Do not call get_outermost_scope_block().
19276
        Do not call make_back_edges().
19277
        (make_continue_stmt_edges): Call find_loop_parent().  Emit an error
19278
        if the 'continue' statement is not inside a loop.  Call
19279
        get_condition_block() to find the target node.
19280
        (make_return_stmt_edges): Do not call get_outermost_scope_block().
19281
        (get_successor_block): Return EXIT_BLOCK_PTR if 'bb' is the last
19282
        block in the graph.
19283
        Return the condition node of the loop if 'bb' doesn't have a
19284
        natural successor and its parent is a loop header.
19285
        (tree_cfg2dot): Output fake edges with dotted lines.
19286
        * tree-dfa.c (USE_TREE_IL): Remove.
19287
        * tree-opt.c (USE_TREE_IL): Remove.
19288
        * tree-ssa.c (USE_TREE_IL): Remove.
19289
        * tree-flow.h (is_last_block_of_loop): Remove.
19290
 
19291
2001-07-23  Diego Novillo  
19292
 
19293
        * Makefile.in (C_AND_OBJC_OBJS): Add tree-cfg.o, tree-dfa.o,
19294
        tree-ssa.o and tree-opt.o.
19295
        (c-decl.o): Add dependency on tree-opt.h
19296
        (tree-ssa.o): New rule.
19297
        (tree-cfg.o): New rule.
19298
        (tree-dfa.o): New rule.
19299
        (tree-opt.o): New rule.
19300
        * c-decl.c: Include tree-opt.h.
19301
        (c_expand_body): Call optimize_tree() when the -ftree-ssa flag is
19302
        given.
19303
        * flags.h (flag_tree_ssa): Declare.
19304
        * toplev.c (flag_tree_ssa): Define.
19305
        (lang_independent_options): Add -ftree-ssa.
19306
        * tree-cfg.c: New file.
19307
        * tree-dfa.c: New file.
19308
        * tree-flow.h: New file.
19309
        * tree-opt.c: New file.
19310
        * tree-opt.h: New file.
19311
        * tree-ssa.c: New file.
19312
        * cp/Make-lang.in (CXX_C_OBJS): Add tree-cfg.o, tree-dfa.o,
19313
        tree-opt.o and tree-ssa.o.
19314
        * doc/invoke.texi: Add documentation for -ftree-ssa.
19315
 
19316
2001-07-23  Nathan Sidwell  
19317
 
19318
        * Makefile.in (calls.o): Depend on intl.h.
19319
        * calls.c: Include intl.h.
19320
        (ECF_NEED_STACK_FRAME, ECF_NEED_ARG_FRAME): New flags.
19321
        (special_function_p): Detect when we need a stack or arg
19322
        frame. Don't optimize on length.
19323
        (setjmp_call_p): Remove.
19324
        (uninlinable_call_p): New function.
19325
        * tree.h (setjmp_call_p): Remove.
19326
        (uninlinable_call_p): Declare.
19327
 
19328
2001-07-22  Nathan Sidwell  
19329
 
19330
        * params.def (PARAM_MAX_INLINE_AST): New parameter.
19331
        (PARAM_ARG_INLINE_AST): New parameter.
19332
        * doc/invoke.texi (max-inline-ast, arg-inline-ast): Document
19333
        parameters.
19334
 
19335
Local Variables:
19336
mode: change-log
19337
change-log-default-name: "ChangeLog.tree-ssa"
19338
End:
19339
 
19340
 
19341
Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
19342
 
19343
Copying and distribution of this file, with or without modification,
19344
are permitted in any medium without royalty provided the copyright
19345
notice and this notice are preserved.

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