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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [tree-streamer-in.c] - Blame information for rev 751

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1 684 jeremybenn
/* Routines for reading trees from a file stream.
2
 
3
   Copyright 2011 Free Software Foundation, Inc.
4
   Contributed by Diego Novillo <dnovillo@google.com>
5
 
6
This file is part of GCC.
7
 
8
GCC is free software; you can redistribute it and/or modify it under
9
the terms of the GNU General Public License as published by the Free
10
Software Foundation; either version 3, or (at your option) any later
11
version.
12
 
13
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14
WARRANTY; without even the implied warranty of MERCHANTABILITY or
15
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
16
for more details.
17
 
18
You should have received a copy of the GNU General Public License
19
along with GCC; see the file COPYING3.  If not see
20
<http://www.gnu.org/licenses/>.  */
21
 
22
#include "config.h"
23
#include "system.h"
24
#include "coretypes.h"
25
#include "diagnostic.h"
26
#include "tree.h"
27
#include "tree-flow.h"
28
#include "tree-streamer.h"
29
#include "data-streamer.h"
30
#include "streamer-hooks.h"
31
#include "lto-streamer.h"
32
 
33
/* Read a STRING_CST from the string table in DATA_IN using input
34
   block IB.  */
35
 
36
tree
37
streamer_read_string_cst (struct data_in *data_in, struct lto_input_block *ib)
38
{
39
  unsigned int len;
40
  const char * ptr;
41
 
42
  ptr = streamer_read_indexed_string (data_in, ib, &len);
43
  if (!ptr)
44
    return NULL;
45
  return build_string (len, ptr);
46
}
47
 
48
 
49
/* Read an IDENTIFIER from the string table in DATA_IN using input
50
   block IB.  */
51
 
52
static tree
53
input_identifier (struct data_in *data_in, struct lto_input_block *ib)
54
{
55
  unsigned int len;
56
  const char *ptr;
57
 
58
  ptr = streamer_read_indexed_string (data_in, ib, &len);
59
  if (!ptr)
60
    return NULL;
61
  return get_identifier_with_length (ptr, len);
62
}
63
 
64
 
65
/* Read a chain of tree nodes from input block IB. DATA_IN contains
66
   tables and descriptors for the file being read.  */
67
 
68
tree
69
streamer_read_chain (struct lto_input_block *ib, struct data_in *data_in)
70
{
71
  int i, count;
72
  tree first, prev, curr;
73
 
74
  first = prev = NULL_TREE;
75
  count = streamer_read_hwi (ib);
76
  for (i = 0; i < count; i++)
77
    {
78
      curr = stream_read_tree (ib, data_in);
79
      if (prev)
80
        TREE_CHAIN (prev) = curr;
81
      else
82
        first = curr;
83
 
84
      TREE_CHAIN (curr) = NULL_TREE;
85
      prev = curr;
86
    }
87
 
88
  return first;
89
}
90
 
91
 
92
/* Unpack all the non-pointer fields of the TS_BASE structure of
93
   expression EXPR from bitpack BP.  */
94
 
95
static void
96
unpack_ts_base_value_fields (struct bitpack_d *bp, tree expr)
97
{
98
  /* Note that the code for EXPR has already been unpacked to create EXPR in
99
     streamer_alloc_tree.  */
100
  if (!TYPE_P (expr))
101
    {
102
      TREE_SIDE_EFFECTS (expr) = (unsigned) bp_unpack_value (bp, 1);
103
      TREE_CONSTANT (expr) = (unsigned) bp_unpack_value (bp, 1);
104
      TREE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1);
105
 
106
      /* TREE_PUBLIC is used on types to indicate that the type
107
         has a TYPE_CACHED_VALUES vector.  This is not streamed out,
108
         so we skip it here.  */
109
      TREE_PUBLIC (expr) = (unsigned) bp_unpack_value (bp, 1);
110
    }
111
  else
112
    bp_unpack_value (bp, 4);
113
  TREE_ADDRESSABLE (expr) = (unsigned) bp_unpack_value (bp, 1);
114
  TREE_THIS_VOLATILE (expr) = (unsigned) bp_unpack_value (bp, 1);
115
  if (DECL_P (expr))
116
    DECL_UNSIGNED (expr) = (unsigned) bp_unpack_value (bp, 1);
117
  else if (TYPE_P (expr))
118
    TYPE_UNSIGNED (expr) = (unsigned) bp_unpack_value (bp, 1);
119
  else
120
    bp_unpack_value (bp, 1);
121
  TREE_ASM_WRITTEN (expr) = (unsigned) bp_unpack_value (bp, 1);
122
  if (TYPE_P (expr))
123
    TYPE_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1);
124
  else
125
    TREE_NO_WARNING (expr) = (unsigned) bp_unpack_value (bp, 1);
126
  TREE_USED (expr) = (unsigned) bp_unpack_value (bp, 1);
127
  TREE_NOTHROW (expr) = (unsigned) bp_unpack_value (bp, 1);
128
  TREE_STATIC (expr) = (unsigned) bp_unpack_value (bp, 1);
129
  TREE_PRIVATE (expr) = (unsigned) bp_unpack_value (bp, 1);
130
  TREE_PROTECTED (expr) = (unsigned) bp_unpack_value (bp, 1);
131
  TREE_DEPRECATED (expr) = (unsigned) bp_unpack_value (bp, 1);
132
  if (TYPE_P (expr))
133
    {
134
      TYPE_SATURATING (expr) = (unsigned) bp_unpack_value (bp, 1);
135
      TYPE_ADDR_SPACE (expr) = (unsigned) bp_unpack_value (bp, 8);
136
    }
137
  else if (TREE_CODE (expr) == SSA_NAME)
138
    SSA_NAME_IS_DEFAULT_DEF (expr) = (unsigned) bp_unpack_value (bp, 1);
139
  else
140
    bp_unpack_value (bp, 1);
141
}
142
 
143
 
144
/* Unpack all the non-pointer fields of the TS_REAL_CST structure of
145
   expression EXPR from bitpack BP.  */
146
 
147
static void
148
unpack_ts_real_cst_value_fields (struct bitpack_d *bp, tree expr)
149
{
150
  unsigned i;
151
  REAL_VALUE_TYPE r;
152
  REAL_VALUE_TYPE *rp;
153
 
154
  r.cl = (unsigned) bp_unpack_value (bp, 2);
155
  r.decimal = (unsigned) bp_unpack_value (bp, 1);
156
  r.sign = (unsigned) bp_unpack_value (bp, 1);
157
  r.signalling = (unsigned) bp_unpack_value (bp, 1);
158
  r.canonical = (unsigned) bp_unpack_value (bp, 1);
159
  r.uexp = (unsigned) bp_unpack_value (bp, EXP_BITS);
160
  for (i = 0; i < SIGSZ; i++)
161
    r.sig[i] = (unsigned long) bp_unpack_value (bp, HOST_BITS_PER_LONG);
162
 
163
  rp = ggc_alloc_real_value ();
164
  memcpy (rp, &r, sizeof (REAL_VALUE_TYPE));
165
  TREE_REAL_CST_PTR (expr) = rp;
166
}
167
 
168
 
169
/* Unpack all the non-pointer fields of the TS_FIXED_CST structure of
170
   expression EXPR from bitpack BP.  */
171
 
172
static void
173
unpack_ts_fixed_cst_value_fields (struct bitpack_d *bp, tree expr)
174
{
175
  struct fixed_value fv;
176
 
177
  fv.mode = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
178
  fv.data.low = bp_unpack_var_len_int (bp);
179
  fv.data.high = bp_unpack_var_len_int (bp);
180
  TREE_FIXED_CST (expr) = fv;
181
}
182
 
183
 
184
/* Unpack all the non-pointer fields of the TS_DECL_COMMON structure
185
   of expression EXPR from bitpack BP.  */
186
 
187
static void
188
unpack_ts_decl_common_value_fields (struct bitpack_d *bp, tree expr)
189
{
190
  DECL_MODE (expr) = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
191
  DECL_NONLOCAL (expr) = (unsigned) bp_unpack_value (bp, 1);
192
  DECL_VIRTUAL_P (expr) = (unsigned) bp_unpack_value (bp, 1);
193
  DECL_IGNORED_P (expr) = (unsigned) bp_unpack_value (bp, 1);
194
  DECL_ABSTRACT (expr) = (unsigned) bp_unpack_value (bp, 1);
195
  DECL_ARTIFICIAL (expr) = (unsigned) bp_unpack_value (bp, 1);
196
  DECL_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
197
  DECL_PRESERVE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
198
  DECL_DEBUG_EXPR_IS_FROM (expr) = (unsigned) bp_unpack_value (bp, 1);
199
  DECL_EXTERNAL (expr) = (unsigned) bp_unpack_value (bp, 1);
200
  DECL_GIMPLE_REG_P (expr) = (unsigned) bp_unpack_value (bp, 1);
201
  DECL_ALIGN (expr) = (unsigned) bp_unpack_var_len_unsigned (bp);
202
 
203
  if (TREE_CODE (expr) == LABEL_DECL)
204
    {
205
      DECL_ERROR_ISSUED (expr) = (unsigned) bp_unpack_value (bp, 1);
206
      EH_LANDING_PAD_NR (expr) = (int) bp_unpack_var_len_unsigned (bp);
207
 
208
      /* Always assume an initial value of -1 for LABEL_DECL_UID to
209
         force gimple_set_bb to recreate label_to_block_map.  */
210
      LABEL_DECL_UID (expr) = -1;
211
    }
212
 
213
  if (TREE_CODE (expr) == FIELD_DECL)
214
    {
215
      DECL_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
216
      DECL_NONADDRESSABLE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
217
      expr->decl_common.off_align = bp_unpack_value (bp, 8);
218
    }
219
 
220
  if (TREE_CODE (expr) == RESULT_DECL
221
      || TREE_CODE (expr) == PARM_DECL
222
      || TREE_CODE (expr) == VAR_DECL)
223
    {
224
      DECL_BY_REFERENCE (expr) = (unsigned) bp_unpack_value (bp, 1);
225
      if (TREE_CODE (expr) == VAR_DECL
226
          || TREE_CODE (expr) == PARM_DECL)
227
        DECL_HAS_VALUE_EXPR_P (expr) = (unsigned) bp_unpack_value (bp, 1);
228
      DECL_RESTRICTED_P (expr) = (unsigned) bp_unpack_value (bp, 1);
229
    }
230
}
231
 
232
 
233
/* Unpack all the non-pointer fields of the TS_DECL_WRTL structure
234
   of expression EXPR from bitpack BP.  */
235
 
236
static void
237
unpack_ts_decl_wrtl_value_fields (struct bitpack_d *bp, tree expr)
238
{
239
  DECL_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
240
}
241
 
242
 
243
/* Unpack all the non-pointer fields of the TS_DECL_WITH_VIS structure
244
   of expression EXPR from bitpack BP.  */
245
 
246
static void
247
unpack_ts_decl_with_vis_value_fields (struct bitpack_d *bp, tree expr)
248
{
249
  DECL_DEFER_OUTPUT (expr) = (unsigned) bp_unpack_value (bp, 1);
250
  DECL_COMMON (expr) = (unsigned) bp_unpack_value (bp, 1);
251
  DECL_DLLIMPORT_P (expr) = (unsigned) bp_unpack_value (bp, 1);
252
  DECL_WEAK (expr) = (unsigned) bp_unpack_value (bp, 1);
253
  DECL_SEEN_IN_BIND_EXPR_P (expr) = (unsigned) bp_unpack_value (bp,  1);
254
  DECL_COMDAT (expr) = (unsigned) bp_unpack_value (bp,  1);
255
  DECL_VISIBILITY (expr) = (enum symbol_visibility) bp_unpack_value (bp,  2);
256
  DECL_VISIBILITY_SPECIFIED (expr) = (unsigned) bp_unpack_value (bp,  1);
257
 
258
  if (TREE_CODE (expr) == VAR_DECL)
259
    {
260
      DECL_HARD_REGISTER (expr) = (unsigned) bp_unpack_value (bp, 1);
261
      DECL_IN_TEXT_SECTION (expr) = (unsigned) bp_unpack_value (bp, 1);
262
      DECL_IN_CONSTANT_POOL (expr) = (unsigned) bp_unpack_value (bp, 1);
263
      DECL_TLS_MODEL (expr) = (enum tls_model) bp_unpack_value (bp,  3);
264
    }
265
 
266
  if (VAR_OR_FUNCTION_DECL_P (expr))
267
    {
268
      priority_type p;
269
      p = (priority_type) bp_unpack_var_len_unsigned (bp);
270
      SET_DECL_INIT_PRIORITY (expr, p);
271
    }
272
}
273
 
274
 
275
/* Unpack all the non-pointer fields of the TS_FUNCTION_DECL structure
276
   of expression EXPR from bitpack BP.  */
277
 
278
static void
279
unpack_ts_function_decl_value_fields (struct bitpack_d *bp, tree expr)
280
{
281
  DECL_BUILT_IN_CLASS (expr) = bp_unpack_enum (bp, built_in_class,
282
                                               BUILT_IN_LAST);
283
  DECL_STATIC_CONSTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
284
  DECL_STATIC_DESTRUCTOR (expr) = (unsigned) bp_unpack_value (bp, 1);
285
  DECL_UNINLINABLE (expr) = (unsigned) bp_unpack_value (bp, 1);
286
  DECL_POSSIBLY_INLINED (expr) = (unsigned) bp_unpack_value (bp, 1);
287
  DECL_IS_NOVOPS (expr) = (unsigned) bp_unpack_value (bp, 1);
288
  DECL_IS_RETURNS_TWICE (expr) = (unsigned) bp_unpack_value (bp, 1);
289
  DECL_IS_MALLOC (expr) = (unsigned) bp_unpack_value (bp, 1);
290
  DECL_IS_OPERATOR_NEW (expr) = (unsigned) bp_unpack_value (bp, 1);
291
  DECL_DECLARED_INLINE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
292
  DECL_STATIC_CHAIN (expr) = (unsigned) bp_unpack_value (bp, 1);
293
  DECL_NO_INLINE_WARNING_P (expr) = (unsigned) bp_unpack_value (bp, 1);
294
  DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (expr)
295
                        = (unsigned) bp_unpack_value (bp, 1);
296
  DECL_NO_LIMIT_STACK (expr) = (unsigned) bp_unpack_value (bp, 1);
297
  DECL_DISREGARD_INLINE_LIMITS (expr) = (unsigned) bp_unpack_value (bp, 1);
298
  DECL_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
299
  DECL_LOOPING_CONST_OR_PURE_P (expr) = (unsigned) bp_unpack_value (bp, 1);
300
  if (DECL_BUILT_IN_CLASS (expr) != NOT_BUILT_IN)
301
    {
302
      DECL_FUNCTION_CODE (expr) = (enum built_in_function) bp_unpack_value (bp,
303
                                                                            11);
304
      if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_NORMAL
305
          && DECL_FUNCTION_CODE (expr) >= END_BUILTINS)
306
        fatal_error ("machine independent builtin code out of range");
307
      else if (DECL_BUILT_IN_CLASS (expr) == BUILT_IN_MD)
308
        {
309
          tree result = targetm.builtin_decl (DECL_FUNCTION_CODE (expr), true);
310
          if (!result || result == error_mark_node)
311
            fatal_error ("target specific builtin not available");
312
        }
313
    }
314
  if (DECL_STATIC_DESTRUCTOR (expr))
315
    {
316
      priority_type p;
317
      p = (priority_type) bp_unpack_var_len_unsigned (bp);
318
      SET_DECL_FINI_PRIORITY (expr, p);
319
    }
320
}
321
 
322
 
323
/* Unpack all the non-pointer fields of the TS_TYPE_COMMON structure
324
   of expression EXPR from bitpack BP.  */
325
 
326
static void
327
unpack_ts_type_common_value_fields (struct bitpack_d *bp, tree expr)
328
{
329
  enum machine_mode mode;
330
 
331
  mode = bp_unpack_enum (bp, machine_mode, MAX_MACHINE_MODE);
332
  SET_TYPE_MODE (expr, mode);
333
  TYPE_STRING_FLAG (expr) = (unsigned) bp_unpack_value (bp, 1);
334
  TYPE_NO_FORCE_BLK (expr) = (unsigned) bp_unpack_value (bp, 1);
335
  TYPE_NEEDS_CONSTRUCTING (expr) = (unsigned) bp_unpack_value (bp, 1);
336
  if (RECORD_OR_UNION_TYPE_P (expr))
337
    TYPE_TRANSPARENT_AGGR (expr) = (unsigned) bp_unpack_value (bp, 1);
338
  TYPE_PACKED (expr) = (unsigned) bp_unpack_value (bp, 1);
339
  TYPE_RESTRICT (expr) = (unsigned) bp_unpack_value (bp, 1);
340
  TYPE_CONTAINS_PLACEHOLDER_INTERNAL (expr)
341
        = (unsigned) bp_unpack_value (bp, 2);
342
  TYPE_USER_ALIGN (expr) = (unsigned) bp_unpack_value (bp, 1);
343
  TYPE_READONLY (expr) = (unsigned) bp_unpack_value (bp, 1);
344
  TYPE_PRECISION (expr) = bp_unpack_var_len_unsigned (bp);
345
  TYPE_ALIGN (expr) = bp_unpack_var_len_unsigned (bp);
346
  TYPE_ALIAS_SET (expr) = bp_unpack_var_len_int (bp);
347
}
348
 
349
 
350
/* Unpack all the non-pointer fields of the TS_BLOCK structure
351
   of expression EXPR from bitpack BP.  */
352
 
353
static void
354
unpack_ts_block_value_fields (struct bitpack_d *bp, tree expr)
355
{
356
  BLOCK_ABSTRACT (expr) = (unsigned) bp_unpack_value (bp, 1);
357
  /* BLOCK_NUMBER is recomputed.  */
358
}
359
 
360
/* Unpack all the non-pointer fields of the TS_TRANSLATION_UNIT_DECL
361
   structure of expression EXPR from bitpack BP.  */
362
 
363
static void
364
unpack_ts_translation_unit_decl_value_fields (struct bitpack_d *bp ATTRIBUTE_UNUSED, tree expr ATTRIBUTE_UNUSED)
365
{
366
}
367
 
368
/* Unpack all the non-pointer fields in EXPR into a bit pack.  */
369
 
370
static void
371
unpack_value_fields (struct bitpack_d *bp, tree expr)
372
{
373
  enum tree_code code;
374
 
375
  code = TREE_CODE (expr);
376
 
377
  /* Note that all these functions are highly sensitive to changes in
378
     the types and sizes of each of the fields being packed.  */
379
  unpack_ts_base_value_fields (bp, expr);
380
 
381
  if (CODE_CONTAINS_STRUCT (code, TS_REAL_CST))
382
    unpack_ts_real_cst_value_fields (bp, expr);
383
 
384
  if (CODE_CONTAINS_STRUCT (code, TS_FIXED_CST))
385
    unpack_ts_fixed_cst_value_fields (bp, expr);
386
 
387
  if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
388
    unpack_ts_decl_common_value_fields (bp, expr);
389
 
390
  if (CODE_CONTAINS_STRUCT (code, TS_DECL_WRTL))
391
    unpack_ts_decl_wrtl_value_fields (bp, expr);
392
 
393
  if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
394
    unpack_ts_decl_with_vis_value_fields (bp, expr);
395
 
396
  if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
397
    unpack_ts_function_decl_value_fields (bp, expr);
398
 
399
  if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
400
    unpack_ts_type_common_value_fields (bp, expr);
401
 
402
  if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
403
    unpack_ts_block_value_fields (bp, expr);
404
 
405
  if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL))
406
    unpack_ts_translation_unit_decl_value_fields (bp, expr);
407
}
408
 
409
 
410
/* Read all the language-independent bitfield values for EXPR from IB.
411
   Return the partially unpacked bitpack so the caller can unpack any other
412
   bitfield values that the writer may have written.  */
413
 
414
struct bitpack_d
415
streamer_read_tree_bitfields (struct lto_input_block *ib, tree expr)
416
{
417
  enum tree_code code;
418
  struct bitpack_d bp;
419
 
420
  /* Read the bitpack of non-pointer values from IB.  */
421
  bp = streamer_read_bitpack (ib);
422
 
423
  /* The first word in BP contains the code of the tree that we
424
     are about to read.  */
425
  code = (enum tree_code) bp_unpack_value (&bp, 16);
426
  lto_tag_check (lto_tree_code_to_tag (code),
427
                 lto_tree_code_to_tag (TREE_CODE (expr)));
428
 
429
  /* Unpack all the value fields from BP.  */
430
  unpack_value_fields (&bp, expr);
431
 
432
  return bp;
433
}
434
 
435
 
436
/* Materialize a new tree from input block IB using descriptors in
437
   DATA_IN.  The code for the new tree should match TAG.  Store in
438
   *IX_P the index into the reader cache where the new tree is stored.  */
439
 
440
tree
441
streamer_alloc_tree (struct lto_input_block *ib, struct data_in *data_in,
442
                     enum LTO_tags tag)
443
{
444
  enum tree_code code;
445
  tree result;
446
#ifdef LTO_STREAMER_DEBUG
447
  HOST_WIDEST_INT orig_address_in_writer;
448
#endif
449
 
450
  result = NULL_TREE;
451
 
452
#ifdef LTO_STREAMER_DEBUG
453
  /* Read the word representing the memory address for the tree
454
     as it was written by the writer.  This is useful when
455
     debugging differences between the writer and reader.  */
456
  orig_address_in_writer = streamer_read_hwi (ib);
457
  gcc_assert ((intptr_t) orig_address_in_writer == orig_address_in_writer);
458
#endif
459
 
460
  code = lto_tag_to_tree_code (tag);
461
 
462
  /* We should never see an SSA_NAME tree.  Only the version numbers of
463
     SSA names are ever written out.  See input_ssa_names.  */
464
  gcc_assert (code != SSA_NAME);
465
 
466
  /* Instantiate a new tree using the header data.  */
467
  if (CODE_CONTAINS_STRUCT (code, TS_STRING))
468
    result = streamer_read_string_cst (data_in, ib);
469
  else if (CODE_CONTAINS_STRUCT (code, TS_IDENTIFIER))
470
    result = input_identifier (data_in, ib);
471
  else if (CODE_CONTAINS_STRUCT (code, TS_VEC))
472
    {
473
      HOST_WIDE_INT len = streamer_read_hwi (ib);
474
      result = make_tree_vec (len);
475
    }
476
  else if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
477
    {
478
      unsigned HOST_WIDE_INT len = streamer_read_uhwi (ib);
479
      result = make_tree_binfo (len);
480
    }
481
  else if (code == CALL_EXPR)
482
    {
483
      unsigned HOST_WIDE_INT nargs = streamer_read_uhwi (ib);
484
      return build_vl_exp (CALL_EXPR, nargs + 3);
485
    }
486
  else
487
    {
488
      /* For all other nodes, materialize the tree with a raw
489
         make_node call.  */
490
      result = make_node (code);
491
    }
492
 
493
#ifdef LTO_STREAMER_DEBUG
494
  /* Store the original address of the tree as seen by the writer
495
     in RESULT's aux field.  This is useful when debugging streaming
496
     problems.  This way, a debugging session can be started on
497
     both writer and reader with a breakpoint using this address
498
     value in both.  */
499
  lto_orig_address_map (result, (intptr_t) orig_address_in_writer);
500
#endif
501
 
502
  return result;
503
}
504
 
505
 
506
/* Read all pointer fields in the TS_COMMON structure of EXPR from input
507
   block IB.  DATA_IN contains tables and descriptors for the
508
   file being read.  */
509
 
510
 
511
static void
512
lto_input_ts_common_tree_pointers (struct lto_input_block *ib,
513
                                   struct data_in *data_in, tree expr)
514
{
515
  if (TREE_CODE (expr) != IDENTIFIER_NODE)
516
    TREE_TYPE (expr) = stream_read_tree (ib, data_in);
517
}
518
 
519
 
520
/* Read all pointer fields in the TS_VECTOR structure of EXPR from input
521
   block IB.  DATA_IN contains tables and descriptors for the
522
   file being read.  */
523
 
524
static void
525
lto_input_ts_vector_tree_pointers (struct lto_input_block *ib,
526
                                   struct data_in *data_in, tree expr)
527
{
528
  TREE_VECTOR_CST_ELTS (expr) = streamer_read_chain (ib, data_in);
529
}
530
 
531
 
532
/* Read all pointer fields in the TS_COMPLEX structure of EXPR from input
533
   block IB.  DATA_IN contains tables and descriptors for the
534
   file being read.  */
535
 
536
static void
537
lto_input_ts_complex_tree_pointers (struct lto_input_block *ib,
538
                                    struct data_in *data_in, tree expr)
539
{
540
  TREE_REALPART (expr) = stream_read_tree (ib, data_in);
541
  TREE_IMAGPART (expr) = stream_read_tree (ib, data_in);
542
}
543
 
544
 
545
/* Read all pointer fields in the TS_DECL_MINIMAL structure of EXPR
546
   from input block IB.  DATA_IN contains tables and descriptors for the
547
   file being read.  */
548
 
549
static void
550
lto_input_ts_decl_minimal_tree_pointers (struct lto_input_block *ib,
551
                                         struct data_in *data_in, tree expr)
552
{
553
  DECL_NAME (expr) = stream_read_tree (ib, data_in);
554
  DECL_CONTEXT (expr) = stream_read_tree (ib, data_in);
555
  DECL_SOURCE_LOCATION (expr) = lto_input_location (ib, data_in);
556
}
557
 
558
 
559
/* Read all pointer fields in the TS_DECL_COMMON structure of EXPR from
560
   input block IB.  DATA_IN contains tables and descriptors for the
561
   file being read.  */
562
 
563
static void
564
lto_input_ts_decl_common_tree_pointers (struct lto_input_block *ib,
565
                                        struct data_in *data_in, tree expr)
566
{
567
  DECL_SIZE (expr) = stream_read_tree (ib, data_in);
568
  DECL_SIZE_UNIT (expr) = stream_read_tree (ib, data_in);
569
  DECL_ATTRIBUTES (expr) = stream_read_tree (ib, data_in);
570
 
571
  /* Do not stream DECL_ABSTRACT_ORIGIN.  We cannot handle debug information
572
     for early inlining so drop it on the floor instead of ICEing in
573
     dwarf2out.c.  */
574
 
575
  if (TREE_CODE (expr) == PARM_DECL)
576
    TREE_CHAIN (expr) = streamer_read_chain (ib, data_in);
577
 
578
  if ((TREE_CODE (expr) == VAR_DECL
579
       || TREE_CODE (expr) == PARM_DECL)
580
      && DECL_HAS_VALUE_EXPR_P (expr))
581
    SET_DECL_VALUE_EXPR (expr, stream_read_tree (ib, data_in));
582
 
583
  if (TREE_CODE (expr) == VAR_DECL)
584
    {
585
      tree dexpr = stream_read_tree (ib, data_in);
586
      if (dexpr)
587
        SET_DECL_DEBUG_EXPR (expr, dexpr);
588
    }
589
}
590
 
591
 
592
/* Read all pointer fields in the TS_DECL_NON_COMMON structure of
593
   EXPR from input block IB.  DATA_IN contains tables and descriptors for the
594
   file being read.  */
595
 
596
static void
597
lto_input_ts_decl_non_common_tree_pointers (struct lto_input_block *ib,
598
                                            struct data_in *data_in, tree expr)
599
{
600
  if (TREE_CODE (expr) == FUNCTION_DECL)
601
    {
602
      DECL_ARGUMENTS (expr) = stream_read_tree (ib, data_in);
603
      DECL_RESULT (expr) = stream_read_tree (ib, data_in);
604
    }
605
  else if (TREE_CODE (expr) == TYPE_DECL)
606
    DECL_ORIGINAL_TYPE (expr) = stream_read_tree (ib, data_in);
607
  DECL_VINDEX (expr) = stream_read_tree (ib, data_in);
608
}
609
 
610
 
611
/* Read all pointer fields in the TS_DECL_WITH_VIS structure of EXPR
612
   from input block IB.  DATA_IN contains tables and descriptors for the
613
   file being read.  */
614
 
615
static void
616
lto_input_ts_decl_with_vis_tree_pointers (struct lto_input_block *ib,
617
                                          struct data_in *data_in, tree expr)
618
{
619
  tree id;
620
 
621
  id = stream_read_tree (ib, data_in);
622
  if (id)
623
    {
624
      gcc_assert (TREE_CODE (id) == IDENTIFIER_NODE);
625
      SET_DECL_ASSEMBLER_NAME (expr, id);
626
    }
627
 
628
  DECL_SECTION_NAME (expr) = stream_read_tree (ib, data_in);
629
  DECL_COMDAT_GROUP (expr) = stream_read_tree (ib, data_in);
630
}
631
 
632
 
633
/* Read all pointer fields in the TS_FIELD_DECL structure of EXPR from
634
   input block IB.  DATA_IN contains tables and descriptors for the
635
   file being read.  */
636
 
637
static void
638
lto_input_ts_field_decl_tree_pointers (struct lto_input_block *ib,
639
                                       struct data_in *data_in, tree expr)
640
{
641
  DECL_FIELD_OFFSET (expr) = stream_read_tree (ib, data_in);
642
  DECL_BIT_FIELD_TYPE (expr) = stream_read_tree (ib, data_in);
643
  /* Do not stream DECL_QUALIFIER, it is useless after gimplification.  */
644
  DECL_FIELD_BIT_OFFSET (expr) = stream_read_tree (ib, data_in);
645
  DECL_FCONTEXT (expr) = stream_read_tree (ib, data_in);
646
}
647
 
648
 
649
/* Read all pointer fields in the TS_FUNCTION_DECL structure of EXPR
650
   from input block IB.  DATA_IN contains tables and descriptors for the
651
   file being read.  */
652
 
653
static void
654
lto_input_ts_function_decl_tree_pointers (struct lto_input_block *ib,
655
                                          struct data_in *data_in, tree expr)
656
{
657
  /* DECL_STRUCT_FUNCTION is handled by lto_input_function.  FIXME lto,
658
     maybe it should be handled here?  */
659
  DECL_FUNCTION_PERSONALITY (expr) = stream_read_tree (ib, data_in);
660
  DECL_FUNCTION_SPECIFIC_TARGET (expr) = stream_read_tree (ib, data_in);
661
  DECL_FUNCTION_SPECIFIC_OPTIMIZATION (expr) = stream_read_tree (ib, data_in);
662
 
663
  /* If the file contains a function with an EH personality set,
664
     then it was compiled with -fexceptions.  In that case, initialize
665
     the backend EH machinery.  */
666
  if (DECL_FUNCTION_PERSONALITY (expr))
667
    lto_init_eh ();
668
}
669
 
670
 
671
/* Read all pointer fields in the TS_TYPE_COMMON structure of EXPR from
672
   input block IB.  DATA_IN contains tables and descriptors for the file
673
   being read.  */
674
 
675
static void
676
lto_input_ts_type_common_tree_pointers (struct lto_input_block *ib,
677
                                        struct data_in *data_in, tree expr)
678
{
679
  TYPE_SIZE (expr) = stream_read_tree (ib, data_in);
680
  TYPE_SIZE_UNIT (expr) = stream_read_tree (ib, data_in);
681
  TYPE_ATTRIBUTES (expr) = stream_read_tree (ib, data_in);
682
  TYPE_NAME (expr) = stream_read_tree (ib, data_in);
683
  /* Do not stream TYPE_POINTER_TO or TYPE_REFERENCE_TO.  They will be
684
     reconstructed during fixup.  */
685
  /* Do not stream TYPE_NEXT_VARIANT, we reconstruct the variant lists
686
     during fixup.  */
687
  TYPE_MAIN_VARIANT (expr) = stream_read_tree (ib, data_in);
688
  TYPE_CONTEXT (expr) = stream_read_tree (ib, data_in);
689
  /* TYPE_CANONICAL gets re-computed during type merging.  */
690
  TYPE_CANONICAL (expr) = NULL_TREE;
691
  TYPE_STUB_DECL (expr) = stream_read_tree (ib, data_in);
692
}
693
 
694
/* Read all pointer fields in the TS_TYPE_NON_COMMON structure of EXPR
695
   from input block IB.  DATA_IN contains tables and descriptors for the
696
   file being read.  */
697
 
698
static void
699
lto_input_ts_type_non_common_tree_pointers (struct lto_input_block *ib,
700
                                            struct data_in *data_in,
701
                                            tree expr)
702
{
703
  if (TREE_CODE (expr) == ENUMERAL_TYPE)
704
    TYPE_VALUES (expr) = stream_read_tree (ib, data_in);
705
  else if (TREE_CODE (expr) == ARRAY_TYPE)
706
    TYPE_DOMAIN (expr) = stream_read_tree (ib, data_in);
707
  else if (RECORD_OR_UNION_TYPE_P (expr))
708
    TYPE_FIELDS (expr) = streamer_read_chain (ib, data_in);
709
  else if (TREE_CODE (expr) == FUNCTION_TYPE
710
           || TREE_CODE (expr) == METHOD_TYPE)
711
    TYPE_ARG_TYPES (expr) = stream_read_tree (ib, data_in);
712
 
713
  if (!POINTER_TYPE_P (expr))
714
    TYPE_MINVAL (expr) = stream_read_tree (ib, data_in);
715
  TYPE_MAXVAL (expr) = stream_read_tree (ib, data_in);
716
  if (RECORD_OR_UNION_TYPE_P (expr))
717
    TYPE_BINFO (expr) = stream_read_tree (ib, data_in);
718
}
719
 
720
 
721
/* Read all pointer fields in the TS_LIST structure of EXPR from input
722
   block IB.  DATA_IN contains tables and descriptors for the
723
   file being read.  */
724
 
725
static void
726
lto_input_ts_list_tree_pointers (struct lto_input_block *ib,
727
                                 struct data_in *data_in, tree expr)
728
{
729
  TREE_PURPOSE (expr) = stream_read_tree (ib, data_in);
730
  TREE_VALUE (expr) = stream_read_tree (ib, data_in);
731
  TREE_CHAIN (expr) = streamer_read_chain (ib, data_in);
732
}
733
 
734
 
735
/* Read all pointer fields in the TS_VEC structure of EXPR from input
736
   block IB.  DATA_IN contains tables and descriptors for the
737
   file being read.  */
738
 
739
static void
740
lto_input_ts_vec_tree_pointers (struct lto_input_block *ib,
741
                                struct data_in *data_in, tree expr)
742
{
743
  int i;
744
 
745
  /* Note that TREE_VEC_LENGTH was read by streamer_alloc_tree to
746
     instantiate EXPR.  */
747
  for (i = 0; i < TREE_VEC_LENGTH (expr); i++)
748
    TREE_VEC_ELT (expr, i) = stream_read_tree (ib, data_in);
749
}
750
 
751
 
752
/* Read all pointer fields in the TS_EXP structure of EXPR from input
753
   block IB.  DATA_IN contains tables and descriptors for the
754
   file being read.  */
755
 
756
 
757
static void
758
lto_input_ts_exp_tree_pointers (struct lto_input_block *ib,
759
                                struct data_in *data_in, tree expr)
760
{
761
  int i, length;
762
  location_t loc;
763
 
764
  length = streamer_read_hwi (ib);
765
  gcc_assert (length == TREE_OPERAND_LENGTH (expr));
766
 
767
  for (i = 0; i < length; i++)
768
    TREE_OPERAND (expr, i) = stream_read_tree (ib, data_in);
769
 
770
  loc = lto_input_location (ib, data_in);
771
  SET_EXPR_LOCATION (expr, loc);
772
  TREE_BLOCK (expr) = stream_read_tree (ib, data_in);
773
}
774
 
775
 
776
/* Read all pointer fields in the TS_BLOCK structure of EXPR from input
777
   block IB.  DATA_IN contains tables and descriptors for the
778
   file being read.  */
779
 
780
static void
781
lto_input_ts_block_tree_pointers (struct lto_input_block *ib,
782
                                  struct data_in *data_in, tree expr)
783
{
784
  /* Do not stream BLOCK_SOURCE_LOCATION.  We cannot handle debug information
785
     for early inlining so drop it on the floor instead of ICEing in
786
     dwarf2out.c.  */
787
  BLOCK_VARS (expr) = streamer_read_chain (ib, data_in);
788
 
789
  /* Do not stream BLOCK_NONLOCALIZED_VARS.  We cannot handle debug information
790
     for early inlining so drop it on the floor instead of ICEing in
791
     dwarf2out.c.  */
792
 
793
  BLOCK_SUPERCONTEXT (expr) = stream_read_tree (ib, data_in);
794
 
795
  /* Do not stream BLOCK_ABSTRACT_ORIGIN.  We cannot handle debug information
796
     for early inlining so drop it on the floor instead of ICEing in
797
     dwarf2out.c.  */
798
  BLOCK_FRAGMENT_ORIGIN (expr) = stream_read_tree (ib, data_in);
799
  BLOCK_FRAGMENT_CHAIN (expr) = stream_read_tree (ib, data_in);
800
 
801
  /* We re-compute BLOCK_SUBBLOCKS of our parent here instead
802
     of streaming it.  For non-BLOCK BLOCK_SUPERCONTEXTs we still
803
     stream the child relationship explicitly.  */
804
  if (BLOCK_SUPERCONTEXT (expr)
805
      && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == BLOCK)
806
    {
807
      BLOCK_CHAIN (expr) = BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr));
808
      BLOCK_SUBBLOCKS (BLOCK_SUPERCONTEXT (expr)) = expr;
809
    }
810
 
811
  /* The global block is rooted at the TU decl.  Hook it here to
812
     avoid the need to stream in this block during WPA time.  */
813
  else if (BLOCK_SUPERCONTEXT (expr)
814
           && TREE_CODE (BLOCK_SUPERCONTEXT (expr)) == TRANSLATION_UNIT_DECL)
815
    DECL_INITIAL (BLOCK_SUPERCONTEXT (expr)) = expr;
816
 
817
  /* The function-level block is connected at the time we read in
818
     function bodies for the same reason.  */
819
}
820
 
821
 
822
/* Read all pointer fields in the TS_BINFO structure of EXPR from input
823
   block IB.  DATA_IN contains tables and descriptors for the
824
   file being read.  */
825
 
826
static void
827
lto_input_ts_binfo_tree_pointers (struct lto_input_block *ib,
828
                                  struct data_in *data_in, tree expr)
829
{
830
  unsigned i, len;
831
  tree t;
832
 
833
  /* Note that the number of slots in EXPR was read in
834
     streamer_alloc_tree when instantiating EXPR.  However, the
835
     vector is empty so we cannot rely on VEC_length to know how many
836
     elements to read.  So, this list is emitted as a 0-terminated
837
     list on the writer side.  */
838
  do
839
    {
840
      t = stream_read_tree (ib, data_in);
841
      if (t)
842
        VEC_quick_push (tree, BINFO_BASE_BINFOS (expr), t);
843
    }
844
  while (t);
845
 
846
  BINFO_OFFSET (expr) = stream_read_tree (ib, data_in);
847
  BINFO_VTABLE (expr) = stream_read_tree (ib, data_in);
848
  BINFO_VPTR_FIELD (expr) = stream_read_tree (ib, data_in);
849
 
850
  len = streamer_read_uhwi (ib);
851
  if (len > 0)
852
    {
853
      VEC_reserve_exact (tree, gc, BINFO_BASE_ACCESSES (expr), len);
854
      for (i = 0; i < len; i++)
855
        {
856
          tree a = stream_read_tree (ib, data_in);
857
          VEC_quick_push (tree, BINFO_BASE_ACCESSES (expr), a);
858
        }
859
    }
860
 
861
  BINFO_INHERITANCE_CHAIN (expr) = stream_read_tree (ib, data_in);
862
  BINFO_SUBVTT_INDEX (expr) = stream_read_tree (ib, data_in);
863
  BINFO_VPTR_INDEX (expr) = stream_read_tree (ib, data_in);
864
}
865
 
866
 
867
/* Read all pointer fields in the TS_CONSTRUCTOR structure of EXPR from
868
   input block IB.  DATA_IN contains tables and descriptors for the
869
   file being read.  */
870
 
871
static void
872
lto_input_ts_constructor_tree_pointers (struct lto_input_block *ib,
873
                                        struct data_in *data_in, tree expr)
874
{
875
  unsigned i, len;
876
 
877
  len = streamer_read_uhwi (ib);
878
  for (i = 0; i < len; i++)
879
    {
880
      tree index, value;
881
 
882
      index = stream_read_tree (ib, data_in);
883
      value = stream_read_tree (ib, data_in);
884
      CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (expr), index, value);
885
    }
886
}
887
 
888
 
889
/* Input a TS_TARGET_OPTION tree from IB into EXPR.  */
890
 
891
static void
892
lto_input_ts_target_option (struct lto_input_block *ib, tree expr)
893
{
894
  unsigned i, len;
895
  struct bitpack_d bp;
896
  struct cl_target_option *t = TREE_TARGET_OPTION (expr);
897
 
898
  bp = streamer_read_bitpack (ib);
899
  len = sizeof (struct cl_target_option);
900
  for (i = 0; i < len; i++)
901
    ((unsigned char *)t)[i] = bp_unpack_value (&bp, 8);
902
  if (bp_unpack_value (&bp, 32) != 0x12345678)
903
    fatal_error ("cl_target_option size mismatch in LTO reader and writer");
904
}
905
 
906
/* Input a TS_OPTIMIZATION tree from IB into EXPR.  */
907
 
908
static void
909
lto_input_ts_optimization (struct lto_input_block *ib, tree expr)
910
{
911
  unsigned i, len;
912
  struct bitpack_d bp;
913
  struct cl_optimization *t = TREE_OPTIMIZATION (expr);
914
 
915
  bp = streamer_read_bitpack (ib);
916
  len = sizeof (struct cl_optimization);
917
  for (i = 0; i < len; i++)
918
    ((unsigned char *)t)[i] = bp_unpack_value (&bp, 8);
919
  if (bp_unpack_value (&bp, 32) != 0x12345678)
920
    fatal_error ("cl_optimization size mismatch in LTO reader and writer");
921
}
922
 
923
/* Input a TS_TRANSLATION_UNIT_DECL tree from IB and DATA_IN into EXPR.  */
924
 
925
static void
926
lto_input_ts_translation_unit_decl_tree_pointers (struct lto_input_block *ib,
927
                                                  struct data_in *data_in,
928
                                                  tree expr)
929
{
930
  TRANSLATION_UNIT_LANGUAGE (expr) = xstrdup (streamer_read_string (data_in, ib));
931
  VEC_safe_push (tree, gc, all_translation_units, expr);
932
}
933
 
934
/* Read all pointer fields in EXPR from input block IB.  DATA_IN
935
   contains tables and descriptors for the file being read.  */
936
 
937
void
938
streamer_read_tree_body (struct lto_input_block *ib, struct data_in *data_in,
939
                         tree expr)
940
{
941
  enum tree_code code;
942
 
943
  code = TREE_CODE (expr);
944
 
945
  if (CODE_CONTAINS_STRUCT (code, TS_TYPED))
946
    lto_input_ts_common_tree_pointers (ib, data_in, expr);
947
 
948
  if (CODE_CONTAINS_STRUCT (code, TS_VECTOR))
949
    lto_input_ts_vector_tree_pointers (ib, data_in, expr);
950
 
951
  if (CODE_CONTAINS_STRUCT (code, TS_COMPLEX))
952
    lto_input_ts_complex_tree_pointers (ib, data_in, expr);
953
 
954
  if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
955
    lto_input_ts_decl_minimal_tree_pointers (ib, data_in, expr);
956
 
957
  if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
958
    lto_input_ts_decl_common_tree_pointers (ib, data_in, expr);
959
 
960
  if (CODE_CONTAINS_STRUCT (code, TS_DECL_NON_COMMON))
961
    lto_input_ts_decl_non_common_tree_pointers (ib, data_in, expr);
962
 
963
  if (CODE_CONTAINS_STRUCT (code, TS_DECL_WITH_VIS))
964
    lto_input_ts_decl_with_vis_tree_pointers (ib, data_in, expr);
965
 
966
  if (CODE_CONTAINS_STRUCT (code, TS_FIELD_DECL))
967
    lto_input_ts_field_decl_tree_pointers (ib, data_in, expr);
968
 
969
  if (CODE_CONTAINS_STRUCT (code, TS_FUNCTION_DECL))
970
    lto_input_ts_function_decl_tree_pointers (ib, data_in, expr);
971
 
972
  if (CODE_CONTAINS_STRUCT (code, TS_TYPE_COMMON))
973
    lto_input_ts_type_common_tree_pointers (ib, data_in, expr);
974
 
975
  if (CODE_CONTAINS_STRUCT (code, TS_TYPE_NON_COMMON))
976
    lto_input_ts_type_non_common_tree_pointers (ib, data_in, expr);
977
 
978
  if (CODE_CONTAINS_STRUCT (code, TS_LIST))
979
    lto_input_ts_list_tree_pointers (ib, data_in, expr);
980
 
981
  if (CODE_CONTAINS_STRUCT (code, TS_VEC))
982
    lto_input_ts_vec_tree_pointers (ib, data_in, expr);
983
 
984
  if (CODE_CONTAINS_STRUCT (code, TS_EXP))
985
    lto_input_ts_exp_tree_pointers (ib, data_in, expr);
986
 
987
  if (CODE_CONTAINS_STRUCT (code, TS_BLOCK))
988
    lto_input_ts_block_tree_pointers (ib, data_in, expr);
989
 
990
  if (CODE_CONTAINS_STRUCT (code, TS_BINFO))
991
    lto_input_ts_binfo_tree_pointers (ib, data_in, expr);
992
 
993
  if (CODE_CONTAINS_STRUCT (code, TS_CONSTRUCTOR))
994
    lto_input_ts_constructor_tree_pointers (ib, data_in, expr);
995
 
996
  if (CODE_CONTAINS_STRUCT (code, TS_TARGET_OPTION))
997
    lto_input_ts_target_option (ib, expr);
998
 
999
  if (CODE_CONTAINS_STRUCT (code, TS_OPTIMIZATION))
1000
    lto_input_ts_optimization (ib, expr);
1001
 
1002
  if (CODE_CONTAINS_STRUCT (code, TS_TRANSLATION_UNIT_DECL))
1003
    lto_input_ts_translation_unit_decl_tree_pointers (ib, data_in, expr);
1004
}
1005
 
1006
 
1007
/* Read and INTEGER_CST node from input block IB using the per-file
1008
   context in DATA_IN.  */
1009
 
1010
tree
1011
streamer_read_integer_cst (struct lto_input_block *ib, struct data_in *data_in)
1012
{
1013
  tree result, type;
1014
  HOST_WIDE_INT low, high;
1015
  bool overflow_p;
1016
 
1017
  type = stream_read_tree (ib, data_in);
1018
  overflow_p = (streamer_read_uchar (ib) != 0);
1019
  low = streamer_read_uhwi (ib);
1020
  high = streamer_read_uhwi (ib);
1021
  result = build_int_cst_wide (type, low, high);
1022
 
1023
  /* If the original constant had overflown, build a replica of RESULT to
1024
     avoid modifying the shared constant returned by build_int_cst_wide.  */
1025
  if (overflow_p)
1026
    {
1027
      result = copy_node (result);
1028
      TREE_OVERFLOW (result) = 1;
1029
    }
1030
 
1031
  return result;
1032
}
1033
 
1034
 
1035
/* Read an index IX from input block IB and return the tree node at
1036
   DATA_IN->FILE_DATA->GLOBALS_INDEX[IX].  */
1037
 
1038
tree
1039
streamer_get_pickled_tree (struct lto_input_block *ib, struct data_in *data_in)
1040
{
1041
  unsigned HOST_WIDE_INT ix;
1042
  tree result;
1043
  enum LTO_tags expected_tag;
1044
 
1045
  ix = streamer_read_uhwi (ib);
1046
  expected_tag = streamer_read_enum (ib, LTO_tags, LTO_NUM_TAGS);
1047
 
1048
  result = streamer_tree_cache_get (data_in->reader_cache, ix);
1049
  gcc_assert (result
1050
              && TREE_CODE (result) == lto_tag_to_tree_code (expected_tag));
1051
 
1052
  return result;
1053
}
1054
 
1055
 
1056
/* Read a code and class from input block IB and return the
1057
   corresponding builtin.  DATA_IN is as in stream_read_tree.  */
1058
 
1059
tree
1060
streamer_get_builtin_tree (struct lto_input_block *ib, struct data_in *data_in)
1061
{
1062
  enum built_in_class fclass;
1063
  enum built_in_function fcode;
1064
  const char *asmname;
1065
  tree result;
1066
 
1067
  fclass = streamer_read_enum (ib, built_in_class, BUILT_IN_LAST);
1068
  gcc_assert (fclass == BUILT_IN_NORMAL || fclass == BUILT_IN_MD);
1069
 
1070
  fcode = (enum built_in_function) streamer_read_uhwi (ib);
1071
 
1072
  if (fclass == BUILT_IN_NORMAL)
1073
    {
1074
      if (fcode >= END_BUILTINS)
1075
        fatal_error ("machine independent builtin code out of range");
1076
      result = builtin_decl_explicit (fcode);
1077
      gcc_assert (result);
1078
    }
1079
  else if (fclass == BUILT_IN_MD)
1080
    {
1081
      result = targetm.builtin_decl (fcode, true);
1082
      if (!result || result == error_mark_node)
1083
        fatal_error ("target specific builtin not available");
1084
    }
1085
  else
1086
    gcc_unreachable ();
1087
 
1088
  asmname = streamer_read_string (data_in, ib);
1089
  if (asmname)
1090
    set_builtin_user_assembler_name (result, asmname);
1091
 
1092
  streamer_tree_cache_append (data_in->reader_cache, result);
1093
 
1094
  return result;
1095
}

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