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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [passes.c] - Rev 841
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/* Top level of GCC compilers (cc1, cc1plus, etc.) Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. */ /* This is the top level of cc1/c++. It parses command args, opens files, invokes the various passes in the proper order, and counts the time used by each. Error messages and low-level interface to malloc also handled here. */ #include "config.h" #undef FLOAT /* This is for hpux. They should change hpux. */ #undef FFS /* Some systems define this in param.h. */ #include "system.h" #include "coretypes.h" #include "tm.h" #include <signal.h> #ifdef HAVE_SYS_RESOURCE_H # include <sys/resource.h> #endif #ifdef HAVE_SYS_TIMES_H # include <sys/times.h> #endif #include "line-map.h" #include "input.h" #include "tree.h" #include "rtl.h" #include "tm_p.h" #include "flags.h" #include "insn-attr.h" #include "insn-config.h" #include "insn-flags.h" #include "hard-reg-set.h" #include "recog.h" #include "output.h" #include "except.h" #include "function.h" #include "toplev.h" #include "expr.h" #include "basic-block.h" #include "intl.h" #include "ggc.h" #include "graph.h" #include "regs.h" #include "timevar.h" #include "diagnostic.h" #include "params.h" #include "reload.h" #include "dwarf2asm.h" #include "integrate.h" #include "real.h" #include "debug.h" #include "target.h" #include "langhooks.h" #include "cfglayout.h" #include "cfgloop.h" #include "hosthooks.h" #include "cgraph.h" #include "opts.h" #include "coverage.h" #include "value-prof.h" #include "tree-inline.h" #include "tree-flow.h" #include "tree-pass.h" #include "tree-dump.h" #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO) #include "dwarf2out.h" #endif #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO) #include "dbxout.h" #endif #ifdef SDB_DEBUGGING_INFO #include "sdbout.h" #endif #ifdef XCOFF_DEBUGGING_INFO #include "xcoffout.h" /* Needed for external data declarations for e.g. AIX 4.x. */ #endif /* Global variables used to communicate with passes. */ int dump_flags; bool in_gimple_form; /* This is called from various places for FUNCTION_DECL, VAR_DECL, and TYPE_DECL nodes. This does nothing for local (non-static) variables, unless the variable is a register variable with DECL_ASSEMBLER_NAME set. In that case, or if the variable is not an automatic, it sets up the RTL and outputs any assembler code (label definition, storage allocation and initialization). DECL is the declaration. TOP_LEVEL is nonzero if this declaration is not within a function. */ void rest_of_decl_compilation (tree decl, int top_level, int at_end) { /* We deferred calling assemble_alias so that we could collect other attributes such as visibility. Emit the alias now. */ { tree alias; alias = lookup_attribute ("alias", DECL_ATTRIBUTES (decl)); if (alias) { alias = TREE_VALUE (TREE_VALUE (alias)); alias = get_identifier (TREE_STRING_POINTER (alias)); assemble_alias (decl, alias); } } /* Can't defer this, because it needs to happen before any later function definitions are processed. */ if (DECL_ASSEMBLER_NAME_SET_P (decl) && DECL_REGISTER (decl)) make_decl_rtl (decl); /* Forward declarations for nested functions are not "external", but we need to treat them as if they were. */ if (TREE_STATIC (decl) || DECL_EXTERNAL (decl) || TREE_CODE (decl) == FUNCTION_DECL) { timevar_push (TV_VARCONST); /* Don't output anything when a tentative file-scope definition is seen. But at end of compilation, do output code for them. We do output all variables when unit-at-a-time is active and rely on callgraph code to defer them except for forward declarations (see gcc.c-torture/compile/920624-1.c) */ if ((at_end || !DECL_DEFER_OUTPUT (decl) || DECL_INITIAL (decl)) && !DECL_EXTERNAL (decl)) { if (TREE_CODE (decl) != FUNCTION_DECL) cgraph_varpool_finalize_decl (decl); else assemble_variable (decl, top_level, at_end, 0); } #ifdef ASM_FINISH_DECLARE_OBJECT if (decl == last_assemble_variable_decl) { ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl, top_level, at_end); } #endif timevar_pop (TV_VARCONST); } else if (TREE_CODE (decl) == TYPE_DECL /* Like in rest_of_type_compilation, avoid confusing the debug information machinery when there are errors. */ && !(sorrycount || errorcount)) { timevar_push (TV_SYMOUT); debug_hooks->type_decl (decl, !top_level); timevar_pop (TV_SYMOUT); } /* Let cgraph know about the existence of variables. */ if (TREE_CODE (decl) == VAR_DECL && !DECL_EXTERNAL (decl)) cgraph_varpool_node (decl); } /* Called after finishing a record, union or enumeral type. */ void rest_of_type_compilation (tree type, int toplev) { /* Avoid confusing the debug information machinery when there are errors. */ if (errorcount != 0 || sorrycount != 0) return; timevar_push (TV_SYMOUT); debug_hooks->type_decl (TYPE_STUB_DECL (type), !toplev); timevar_pop (TV_SYMOUT); } void finish_optimization_passes (void) { enum tree_dump_index i; struct dump_file_info *dfi; char *name; timevar_push (TV_DUMP); if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities) { dump_file = dump_begin (pass_profile.static_pass_number, NULL); end_branch_prob (); if (dump_file) dump_end (pass_profile.static_pass_number, dump_file); } if (optimize > 0) { dump_file = dump_begin (pass_combine.static_pass_number, NULL); if (dump_file) { dump_combine_total_stats (dump_file); dump_end (pass_combine.static_pass_number, dump_file); } } /* Do whatever is necessary to finish printing the graphs. */ if (graph_dump_format != no_graph) for (i = TDI_end; (dfi = get_dump_file_info (i)) != NULL; ++i) if (dump_initialized_p (i) && (dfi->flags & TDF_GRAPH) != 0 && (name = get_dump_file_name (i)) != NULL) { finish_graph_dump_file (name); free (name); } timevar_pop (TV_DUMP); } static bool gate_rest_of_compilation (void) { /* Early return if there were errors. We can run afoul of our consistency checks, and there's not really much point in fixing them. */ return !(rtl_dump_and_exit || flag_syntax_only || errorcount || sorrycount); } struct tree_opt_pass pass_rest_of_compilation = { NULL, /* name */ gate_rest_of_compilation, /* gate */ NULL, /* execute */ NULL, /* sub */ NULL, /* next */ 0, /* static_pass_number */ TV_REST_OF_COMPILATION, /* tv_id */ PROP_rtl, /* properties_required */ 0, /* properties_provided */ 0, /* properties_destroyed */ 0, /* todo_flags_start */ TODO_ggc_collect, /* todo_flags_finish */ 0 /* letter */ }; static bool gate_postreload (void) { return reload_completed; } struct tree_opt_pass pass_postreload = { NULL, /* name */ gate_postreload, /* gate */ NULL, /* execute */ NULL, /* sub */ NULL, /* next */ 0, /* static_pass_number */ 0, /* tv_id */ PROP_rtl, /* properties_required */ 0, /* properties_provided */ 0, /* properties_destroyed */ 0, /* todo_flags_start */ TODO_ggc_collect, /* todo_flags_finish */ 0 /* letter */ }; /* The root of the compilation pass tree, once constructed. */ struct tree_opt_pass *all_passes, *all_ipa_passes, *all_lowering_passes; /* Iterate over the pass tree allocating dump file numbers. We want to do this depth first, and independent of whether the pass is enabled or not. */ static void register_one_dump_file (struct tree_opt_pass *pass, bool ipa, int properties) { char *dot_name, *flag_name, *glob_name; const char *prefix; char num[10]; int flags; /* See below in next_pass_1. */ num[0] = '\0'; if (pass->static_pass_number != -1) sprintf (num, "%d", ((int) pass->static_pass_number < 0 ? 1 : pass->static_pass_number)); dot_name = concat (".", pass->name, num, NULL); if (ipa) prefix = "ipa-", flags = TDF_IPA; else if (properties & PROP_trees) prefix = "tree-", flags = TDF_TREE; else prefix = "rtl-", flags = TDF_RTL; flag_name = concat (prefix, pass->name, num, NULL); glob_name = concat (prefix, pass->name, NULL); pass->static_pass_number = dump_register (dot_name, flag_name, glob_name, flags, pass->letter); } /* Recursive worker function for register_dump_files. */ static int register_dump_files_1 (struct tree_opt_pass *pass, bool ipa, int properties) { do { int new_properties = (properties | pass->properties_provided) & ~pass->properties_destroyed; if (pass->name) register_one_dump_file (pass, ipa, new_properties); if (pass->sub) new_properties = register_dump_files_1 (pass->sub, false, new_properties); /* If we have a gate, combine the properties that we could have with and without the pass being examined. */ if (pass->gate) properties &= new_properties; else properties = new_properties; pass = pass->next; } while (pass); return properties; } /* Register the dump files for the pipeline starting at PASS. IPA is true if the pass is inter-procedural, and PROPERTIES reflects the properties that are guaranteed to be available at the beginning of the pipeline. */ static void register_dump_files (struct tree_opt_pass *pass, bool ipa, int properties) { pass->properties_required |= properties; pass->todo_flags_start |= TODO_set_props; register_dump_files_1 (pass, ipa, properties); } /* Add a pass to the pass list. Duplicate the pass if it's already in the list. */ static struct tree_opt_pass ** next_pass_1 (struct tree_opt_pass **list, struct tree_opt_pass *pass) { /* A nonzero static_pass_number indicates that the pass is already in the list. */ if (pass->static_pass_number) { struct tree_opt_pass *new; new = xmalloc (sizeof (*new)); memcpy (new, pass, sizeof (*new)); /* Indicate to register_dump_files that this pass has duplicates, and so it should rename the dump file. The first instance will be -1, and be number of duplicates = -static_pass_number - 1. Subsequent instances will be > 0 and just the duplicate number. */ if (pass->name) { pass->static_pass_number -= 1; new->static_pass_number = -pass->static_pass_number; } *list = new; } else { pass->static_pass_number = -1; *list = pass; } return &(*list)->next; } /* Construct the pass tree. The sequencing of passes is driven by the cgraph routines: cgraph_finalize_compilation_unit () for each node N in the cgraph cgraph_analyze_function (N) cgraph_lower_function (N) -> all_lowering_passes If we are optimizing, cgraph_optimize is then invoked: cgraph_optimize () ipa_passes () -> all_ipa_passes cgraph_expand_all_functions () for each node N in the cgraph cgraph_expand_function (N) cgraph_lower_function (N) -> Now a NOP. lang_hooks.callgraph.expand_function (DECL (N)) tree_rest_of_compilation (DECL (N)) -> all_passes */ void init_optimization_passes (void) { struct tree_opt_pass **p; #define NEXT_PASS(PASS) (p = next_pass_1 (p, &PASS)) /* Interprocedural optimization passes. */ p = &all_ipa_passes; NEXT_PASS (pass_early_ipa_inline); NEXT_PASS (pass_early_local_passes); NEXT_PASS (pass_ipa_cp); NEXT_PASS (pass_ipa_inline); NEXT_PASS (pass_ipa_reference); NEXT_PASS (pass_ipa_pure_const); NEXT_PASS (pass_ipa_type_escape); NEXT_PASS (pass_ipa_pta); *p = NULL; /* All passes needed to lower the function into shape optimizers can operate on. */ p = &all_lowering_passes; NEXT_PASS (pass_remove_useless_stmts); NEXT_PASS (pass_mudflap_1); NEXT_PASS (pass_lower_omp); NEXT_PASS (pass_lower_cf); NEXT_PASS (pass_lower_eh); NEXT_PASS (pass_build_cfg); NEXT_PASS (pass_lower_complex_O0); NEXT_PASS (pass_lower_vector); NEXT_PASS (pass_warn_function_return); NEXT_PASS (pass_early_tree_profile); *p = NULL; p = &pass_early_local_passes.sub; NEXT_PASS (pass_tree_profile); NEXT_PASS (pass_cleanup_cfg); NEXT_PASS (pass_rebuild_cgraph_edges); *p = NULL; p = &all_passes; NEXT_PASS (pass_fixup_cfg); NEXT_PASS (pass_init_datastructures); NEXT_PASS (pass_expand_omp); NEXT_PASS (pass_all_optimizations); NEXT_PASS (pass_warn_function_noreturn); NEXT_PASS (pass_mudflap_2); NEXT_PASS (pass_free_datastructures); NEXT_PASS (pass_free_cfg_annotations); NEXT_PASS (pass_expand); NEXT_PASS (pass_rest_of_compilation); NEXT_PASS (pass_clean_state); *p = NULL; p = &pass_all_optimizations.sub; NEXT_PASS (pass_referenced_vars); NEXT_PASS (pass_reset_cc_flags); NEXT_PASS (pass_create_structure_vars); NEXT_PASS (pass_build_ssa); NEXT_PASS (pass_may_alias); NEXT_PASS (pass_return_slot); NEXT_PASS (pass_rename_ssa_copies); NEXT_PASS (pass_early_warn_uninitialized); /* Initial scalar cleanups. */ NEXT_PASS (pass_ccp); NEXT_PASS (pass_fre); NEXT_PASS (pass_dce); NEXT_PASS (pass_forwprop); NEXT_PASS (pass_copy_prop); NEXT_PASS (pass_merge_phi); NEXT_PASS (pass_vrp); NEXT_PASS (pass_dce); NEXT_PASS (pass_dominator); /* The only const/copy propagation opportunities left after DOM should be due to degenerate PHI nodes. So rather than run the full propagators, run a specialized pass which only examines PHIs to discover const/copy propagation opportunities. */ NEXT_PASS (pass_phi_only_cprop); NEXT_PASS (pass_phiopt); NEXT_PASS (pass_may_alias); NEXT_PASS (pass_tail_recursion); NEXT_PASS (pass_profile); NEXT_PASS (pass_ch); NEXT_PASS (pass_stdarg); NEXT_PASS (pass_lower_complex); NEXT_PASS (pass_sra); /* FIXME: SRA may generate arbitrary gimple code, exposing new aliased and call-clobbered variables. As mentioned below, pass_may_alias should be a TODO item. */ NEXT_PASS (pass_may_alias); NEXT_PASS (pass_rename_ssa_copies); NEXT_PASS (pass_dominator); /* The only const/copy propagation opportunities left after DOM should be due to degenerate PHI nodes. So rather than run the full propagators, run a specialized pass which only examines PHIs to discover const/copy propagation opportunities. */ NEXT_PASS (pass_phi_only_cprop); NEXT_PASS (pass_reassoc); NEXT_PASS (pass_dce); NEXT_PASS (pass_dse); NEXT_PASS (pass_may_alias); NEXT_PASS (pass_forwprop); NEXT_PASS (pass_phiopt); NEXT_PASS (pass_object_sizes); NEXT_PASS (pass_store_ccp); NEXT_PASS (pass_store_copy_prop); NEXT_PASS (pass_fold_builtins); /* FIXME: May alias should a TODO but for 4.0.0, we add may_alias right after fold builtins which can create arbitrary GIMPLE. */ NEXT_PASS (pass_may_alias); NEXT_PASS (pass_split_crit_edges); NEXT_PASS (pass_pre); NEXT_PASS (pass_may_alias); NEXT_PASS (pass_sink_code); NEXT_PASS (pass_tree_loop); NEXT_PASS (pass_cse_reciprocals); NEXT_PASS (pass_reassoc); NEXT_PASS (pass_vrp); NEXT_PASS (pass_dominator); /* The only const/copy propagation opportunities left after DOM should be due to degenerate PHI nodes. So rather than run the full propagators, run a specialized pass which only examines PHIs to discover const/copy propagation opportunities. */ NEXT_PASS (pass_phi_only_cprop); NEXT_PASS (pass_cd_dce); /* FIXME: If DCE is not run before checking for uninitialized uses, we may get false warnings (e.g., testsuite/gcc.dg/uninit-5.c). However, this also causes us to misdiagnose cases that should be real warnings (e.g., testsuite/gcc.dg/pr18501.c). To fix the false positives in uninit-5.c, we would have to account for the predicates protecting the set and the use of each variable. Using a representation like Gated Single Assignment may help. */ NEXT_PASS (pass_late_warn_uninitialized); NEXT_PASS (pass_dse); NEXT_PASS (pass_forwprop); NEXT_PASS (pass_phiopt); NEXT_PASS (pass_tail_calls); NEXT_PASS (pass_rename_ssa_copies); NEXT_PASS (pass_uncprop); NEXT_PASS (pass_del_ssa); NEXT_PASS (pass_nrv); NEXT_PASS (pass_mark_used_blocks); NEXT_PASS (pass_cleanup_cfg_post_optimizing); *p = NULL; p = &pass_tree_loop.sub; NEXT_PASS (pass_tree_loop_init); NEXT_PASS (pass_copy_prop); NEXT_PASS (pass_lim); NEXT_PASS (pass_tree_unswitch); NEXT_PASS (pass_scev_cprop); NEXT_PASS (pass_empty_loop); NEXT_PASS (pass_record_bounds); NEXT_PASS (pass_linear_transform); NEXT_PASS (pass_iv_canon); NEXT_PASS (pass_if_conversion); NEXT_PASS (pass_vectorize); /* NEXT_PASS (pass_may_alias) cannot be done again because the vectorizer creates alias relations that are not supported by pass_may_alias. */ NEXT_PASS (pass_complete_unroll); NEXT_PASS (pass_loop_prefetch); NEXT_PASS (pass_iv_optimize); NEXT_PASS (pass_tree_loop_done); *p = NULL; p = &pass_vectorize.sub; NEXT_PASS (pass_lower_vector_ssa); NEXT_PASS (pass_dce_loop); *p = NULL; p = &pass_loop2.sub; NEXT_PASS (pass_rtl_loop_init); NEXT_PASS (pass_rtl_move_loop_invariants); NEXT_PASS (pass_rtl_unswitch); NEXT_PASS (pass_rtl_unroll_and_peel_loops); NEXT_PASS (pass_rtl_doloop); NEXT_PASS (pass_rtl_loop_done); *p = NULL; p = &pass_rest_of_compilation.sub; NEXT_PASS (pass_init_function); NEXT_PASS (pass_jump); NEXT_PASS (pass_insn_locators_initialize); NEXT_PASS (pass_rtl_eh); NEXT_PASS (pass_initial_value_sets); NEXT_PASS (pass_unshare_all_rtl); NEXT_PASS (pass_instantiate_virtual_regs); NEXT_PASS (pass_jump2); NEXT_PASS (pass_cse); NEXT_PASS (pass_gcse); NEXT_PASS (pass_jump_bypass); NEXT_PASS (pass_rtl_ifcvt); NEXT_PASS (pass_tracer); /* Perform loop optimizations. It might be better to do them a bit sooner, but we want the profile feedback to work more efficiently. */ NEXT_PASS (pass_loop2); NEXT_PASS (pass_web); NEXT_PASS (pass_cse2); NEXT_PASS (pass_life); NEXT_PASS (pass_combine); NEXT_PASS (pass_if_after_combine); NEXT_PASS (pass_partition_blocks); NEXT_PASS (pass_regmove); NEXT_PASS (pass_split_all_insns); NEXT_PASS (pass_mode_switching); NEXT_PASS (pass_see); NEXT_PASS (pass_recompute_reg_usage); NEXT_PASS (pass_sms); NEXT_PASS (pass_sched); NEXT_PASS (pass_local_alloc); NEXT_PASS (pass_global_alloc); NEXT_PASS (pass_postreload); *p = NULL; p = &pass_postreload.sub; NEXT_PASS (pass_postreload_cse); NEXT_PASS (pass_gcse2); NEXT_PASS (pass_flow2); NEXT_PASS (pass_rtl_seqabstr); NEXT_PASS (pass_stack_adjustments); NEXT_PASS (pass_peephole2); NEXT_PASS (pass_if_after_reload); NEXT_PASS (pass_regrename); NEXT_PASS (pass_reorder_blocks); NEXT_PASS (pass_branch_target_load_optimize); NEXT_PASS (pass_leaf_regs); NEXT_PASS (pass_sched2); NEXT_PASS (pass_split_before_regstack); NEXT_PASS (pass_stack_regs); NEXT_PASS (pass_compute_alignments); NEXT_PASS (pass_duplicate_computed_gotos); NEXT_PASS (pass_variable_tracking); NEXT_PASS (pass_free_cfg); NEXT_PASS (pass_machine_reorg); NEXT_PASS (pass_purge_lineno_notes); NEXT_PASS (pass_cleanup_barriers); NEXT_PASS (pass_delay_slots); NEXT_PASS (pass_split_for_shorten_branches); NEXT_PASS (pass_convert_to_eh_region_ranges); NEXT_PASS (pass_shorten_branches); NEXT_PASS (pass_set_nothrow_function_flags); NEXT_PASS (pass_final); *p = NULL; #undef NEXT_PASS /* Register the passes with the tree dump code. */ register_dump_files (all_ipa_passes, true, PROP_gimple_any | PROP_gimple_lcf | PROP_gimple_leh | PROP_cfg); register_dump_files (all_lowering_passes, false, PROP_gimple_any); register_dump_files (all_passes, false, PROP_gimple_any | PROP_gimple_lcf | PROP_gimple_leh | PROP_cfg); } static unsigned int last_verified; static unsigned int curr_properties; static void execute_todo (unsigned int flags) { #if defined ENABLE_CHECKING if (need_ssa_update_p ()) gcc_assert (flags & TODO_update_ssa_any); #endif if (curr_properties & PROP_ssa) flags |= TODO_verify_ssa; flags &= ~last_verified; if (!flags) return; /* Always recalculate SMT usage before doing anything else. */ if (flags & TODO_update_smt_usage) recalculate_used_alone (); /* Always cleanup the CFG before trying to update SSA . */ if (flags & TODO_cleanup_cfg) { /* CFG Cleanup can cause a constant to prop into an ARRAY_REF. */ updating_used_alone = true; if (current_loops) cleanup_tree_cfg_loop (); else cleanup_tree_cfg (); /* Update the used alone after cleanup cfg. */ recalculate_used_alone (); /* When cleanup_tree_cfg merges consecutive blocks, it may perform some simplistic propagation when removing single valued PHI nodes. This propagation may, in turn, cause the SSA form to become out-of-date (see PR 22037). So, even if the parent pass had not scheduled an SSA update, we may still need to do one. */ if (!(flags & TODO_update_ssa_any) && need_ssa_update_p ()) flags |= TODO_update_ssa; } if (flags & TODO_update_ssa_any) { unsigned update_flags = flags & TODO_update_ssa_any; update_ssa (update_flags); last_verified &= ~TODO_verify_ssa; } if (flags & TODO_remove_unused_locals) remove_unused_locals (); if ((flags & TODO_dump_func) && dump_file && current_function_decl) { if (curr_properties & PROP_trees) dump_function_to_file (current_function_decl, dump_file, dump_flags); else { if (dump_flags & TDF_SLIM) print_rtl_slim_with_bb (dump_file, get_insns (), dump_flags); else if ((curr_properties & PROP_cfg) && (dump_flags & TDF_BLOCKS)) print_rtl_with_bb (dump_file, get_insns ()); else print_rtl (dump_file, get_insns ()); if (curr_properties & PROP_cfg && graph_dump_format != no_graph && (dump_flags & TDF_GRAPH)) print_rtl_graph_with_bb (dump_file_name, get_insns ()); } /* Flush the file. If verification fails, we won't be able to close the file before aborting. */ fflush (dump_file); } if ((flags & TODO_dump_cgraph) && dump_file && !current_function_decl) { dump_cgraph (dump_file); /* Flush the file. If verification fails, we won't be able to close the file before aborting. */ fflush (dump_file); } if (flags & TODO_ggc_collect) { ggc_collect (); } #if defined ENABLE_CHECKING if (flags & TODO_verify_ssa) verify_ssa (true); if (flags & TODO_verify_flow) verify_flow_info (); if (flags & TODO_verify_stmts) verify_stmts (); if (flags & TODO_verify_loops) verify_loop_closed_ssa (); #endif last_verified = flags & TODO_verify_all; } /* Verify invariants that should hold between passes. This is a place to put simple sanity checks. */ static void verify_interpass_invariants (void) { #ifdef ENABLE_CHECKING gcc_assert (!fold_deferring_overflow_warnings_p ()); #endif } static bool execute_one_pass (struct tree_opt_pass *pass) { bool initializing_dump; unsigned int todo_after = 0; /* See if we're supposed to run this pass. */ if (pass->gate && !pass->gate ()) return false; if (pass->todo_flags_start & TODO_set_props) curr_properties = pass->properties_required; /* Note that the folders should only create gimple expressions. This is a hack until the new folder is ready. */ in_gimple_form = (curr_properties & PROP_trees) != 0; /* Run pre-pass verification. */ execute_todo (pass->todo_flags_start); gcc_assert ((curr_properties & pass->properties_required) == pass->properties_required); if (pass->properties_destroyed & PROP_smt_usage) updating_used_alone = true; /* If a dump file name is present, open it if enabled. */ if (pass->static_pass_number != -1) { initializing_dump = !dump_initialized_p (pass->static_pass_number); dump_file_name = get_dump_file_name (pass->static_pass_number); dump_file = dump_begin (pass->static_pass_number, &dump_flags); if (dump_file && current_function_decl) { const char *dname, *aname; dname = lang_hooks.decl_printable_name (current_function_decl, 2); aname = (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl))); fprintf (dump_file, "\n;; Function %s (%s)%s\n\n", dname, aname, cfun->function_frequency == FUNCTION_FREQUENCY_HOT ? " (hot)" : cfun->function_frequency == FUNCTION_FREQUENCY_UNLIKELY_EXECUTED ? " (unlikely executed)" : ""); } } else initializing_dump = false; /* If a timevar is present, start it. */ if (pass->tv_id) timevar_push (pass->tv_id); /* Do it! */ if (pass->execute) { todo_after = pass->execute (); last_verified = 0; } /* Stop timevar. */ if (pass->tv_id) timevar_pop (pass->tv_id); curr_properties = (curr_properties | pass->properties_provided) & ~pass->properties_destroyed; if (initializing_dump && dump_file && graph_dump_format != no_graph && (curr_properties & (PROP_cfg | PROP_rtl)) == (PROP_cfg | PROP_rtl)) { get_dump_file_info (pass->static_pass_number)->flags |= TDF_GRAPH; dump_flags |= TDF_GRAPH; clean_graph_dump_file (dump_file_name); } /* Run post-pass cleanup and verification. */ execute_todo (todo_after | pass->todo_flags_finish); verify_interpass_invariants (); /* Flush and close dump file. */ if (dump_file_name) { free ((char *) dump_file_name); dump_file_name = NULL; } if (dump_file) { dump_end (pass->static_pass_number, dump_file); dump_file = NULL; } if (pass->properties_destroyed & PROP_smt_usage) updating_used_alone = false; /* Reset in_gimple_form to not break non-unit-at-a-time mode. */ in_gimple_form = false; return true; } void execute_pass_list (struct tree_opt_pass *pass) { do { if (execute_one_pass (pass) && pass->sub) execute_pass_list (pass->sub); pass = pass->next; } while (pass); } /* Same as execute_pass_list but assume that subpasses of IPA passes are local passes. */ void execute_ipa_pass_list (struct tree_opt_pass *pass) { do { if (execute_one_pass (pass) && pass->sub) { struct cgraph_node *node; for (node = cgraph_nodes; node; node = node->next) if (node->analyzed) { push_cfun (DECL_STRUCT_FUNCTION (node->decl)); current_function_decl = node->decl; execute_pass_list (pass->sub); free_dominance_info (CDI_DOMINATORS); free_dominance_info (CDI_POST_DOMINATORS); current_function_decl = NULL; pop_cfun (); ggc_collect (); } } pass = pass->next; } while (pass); }
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