1 /* Top level of GCC compilers (cc1, cc1plus, etc.)
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
22 /* This is the top level of cc1/c++.
23 It parses command args, opens files, invokes the various passes
24 in the proper order, and counts the time used by each.
25 Error messages and low-level interface to malloc also handled here. */
28 #undef FLOAT /* This is for hpux. They should change hpux. */
29 #undef FFS /* Some systems define this in param.h. */
31 #include "coretypes.h"
35 #ifdef HAVE_SYS_RESOURCE_H
36 # include <sys/resource.h>
39 #ifdef HAVE_SYS_TIMES_H
40 # include <sys/times.h>
49 #include "insn-attr.h"
50 #include "insn-config.h"
51 #include "insn-flags.h"
52 #include "hard-reg-set.h"
59 #include "basic-block.h"
65 #include "diagnostic.h"
68 #include "dwarf2asm.h"
69 #include "integrate.h"
73 #include "langhooks.h"
74 #include "cfglayout.h"
76 #include "hosthooks.h"
80 #include "value-prof.h"
81 #include "tree-inline.h"
82 #include "tree-flow.h"
83 #include "tree-pass.h"
84 #include "tree-dump.h"
86 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
87 #include "dwarf2out.h"
90 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
94 #ifdef SDB_DEBUGGING_INFO
98 #ifdef XCOFF_DEBUGGING_INFO
99 #include "xcoffout.h" /* Needed for external data
100 declarations for e.g. AIX 4.x. */
103 /* Global variables used to communicate with passes. */
108 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
111 This does nothing for local (non-static) variables, unless the
112 variable is a register variable with DECL_ASSEMBLER_NAME set. In
113 that case, or if the variable is not an automatic, it sets up the
114 RTL and outputs any assembler code (label definition, storage
115 allocation and initialization).
117 DECL is the declaration. TOP_LEVEL is nonzero
118 if this declaration is not within a function. */
121 rest_of_decl_compilation (tree decl,
125 /* We deferred calling assemble_alias so that we could collect
126 other attributes such as visibility. Emit the alias now. */
129 alias = lookup_attribute ("alias", DECL_ATTRIBUTES (decl));
132 alias = TREE_VALUE (TREE_VALUE (alias));
133 alias = get_identifier (TREE_STRING_POINTER (alias));
134 assemble_alias (decl, alias);
138 /* Can't defer this, because it needs to happen before any
139 later function definitions are processed. */
140 if (DECL_ASSEMBLER_NAME_SET_P (decl) && DECL_REGISTER (decl))
141 make_decl_rtl (decl);
143 /* Forward declarations for nested functions are not "external",
144 but we need to treat them as if they were. */
145 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
146 || TREE_CODE (decl) == FUNCTION_DECL)
148 timevar_push (TV_VARCONST);
150 /* Don't output anything when a tentative file-scope definition
151 is seen. But at end of compilation, do output code for them.
153 We do output all variables when unit-at-a-time is active and rely on
154 callgraph code to defer them except for forward declarations
155 (see gcc.c-torture/compile/920624-1.c) */
157 || !DECL_DEFER_OUTPUT (decl)
158 || DECL_INITIAL (decl))
159 && !DECL_EXTERNAL (decl))
161 if (flag_unit_at_a_time && !cgraph_global_info_ready
162 && TREE_CODE (decl) != FUNCTION_DECL)
163 cgraph_varpool_finalize_decl (decl);
165 assemble_variable (decl, top_level, at_end, 0);
168 #ifdef ASM_FINISH_DECLARE_OBJECT
169 if (decl == last_assemble_variable_decl)
171 ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl,
176 timevar_pop (TV_VARCONST);
178 else if (TREE_CODE (decl) == TYPE_DECL)
180 timevar_push (TV_SYMOUT);
181 debug_hooks->type_decl (decl, !top_level);
182 timevar_pop (TV_SYMOUT);
185 /* Let cgraph know about the existence of variables. */
186 if (TREE_CODE (decl) == VAR_DECL && !DECL_EXTERNAL (decl))
187 cgraph_varpool_node (decl);
190 /* Called after finishing a record, union or enumeral type. */
193 rest_of_type_compilation (tree type, int toplev)
195 /* Avoid confusing the debug information machinery when there are
197 if (errorcount != 0 || sorrycount != 0)
200 timevar_push (TV_SYMOUT);
201 debug_hooks->type_decl (TYPE_STUB_DECL (type), !toplev);
202 timevar_pop (TV_SYMOUT);
208 finish_optimization_passes (void)
210 enum tree_dump_index i;
211 struct dump_file_info *dfi;
214 timevar_push (TV_DUMP);
215 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
217 dump_file = dump_begin (pass_branch_prob.static_pass_number, NULL);
220 dump_end (pass_branch_prob.static_pass_number, dump_file);
225 dump_file = dump_begin (pass_combine.static_pass_number, NULL);
228 dump_combine_total_stats (dump_file);
229 dump_end (pass_combine.static_pass_number, dump_file);
233 /* Do whatever is necessary to finish printing the graphs. */
234 if (graph_dump_format != no_graph)
235 for (i = TDI_end; (dfi = get_dump_file_info (i)) != NULL; ++i)
236 if (dump_initialized_p (i)
237 && (dfi->flags & TDF_RTL) != 0
238 && (name = get_dump_file_name (i)) != NULL)
240 finish_graph_dump_file (name);
244 timevar_pop (TV_DUMP);
248 gate_rest_of_compilation (void)
250 /* Early return if there were errors. We can run afoul of our
251 consistency checks, and there's not really much point in fixing them. */
252 return !(rtl_dump_and_exit || flag_syntax_only || errorcount || sorrycount);
255 struct tree_opt_pass pass_rest_of_compilation =
258 gate_rest_of_compilation, /* gate */
262 0, /* static_pass_number */
263 TV_REST_OF_COMPILATION, /* tv_id */
264 PROP_rtl, /* properties_required */
265 0, /* properties_provided */
266 0, /* properties_destroyed */
267 0, /* todo_flags_start */
268 TODO_ggc_collect, /* todo_flags_finish */
273 gate_postreload (void)
275 return reload_completed;
278 struct tree_opt_pass pass_postreload =
281 gate_postreload, /* gate */
285 0, /* static_pass_number */
287 PROP_rtl, /* properties_required */
288 0, /* properties_provided */
289 0, /* properties_destroyed */
290 0, /* todo_flags_start */
291 TODO_ggc_collect, /* todo_flags_finish */
297 /* The root of the compilation pass tree, once constructed. */
298 struct tree_opt_pass *all_passes, *all_ipa_passes, *all_lowering_passes;
300 /* Iterate over the pass tree allocating dump file numbers. We want
301 to do this depth first, and independent of whether the pass is
305 register_one_dump_file (struct tree_opt_pass *pass, bool ipa, int n)
307 char *dot_name, *flag_name, *glob_name;
310 /* See below in next_pass_1. */
312 if (pass->static_pass_number != -1)
313 sprintf (num, "%d", ((int) pass->static_pass_number < 0
314 ? 1 : pass->static_pass_number));
316 dot_name = concat (".", pass->name, num, NULL);
319 flag_name = concat ("ipa-", pass->name, num, NULL);
320 glob_name = concat ("ipa-", pass->name, NULL);
321 /* First IPA dump is cgraph that is dumped via separate channels. */
322 pass->static_pass_number = dump_register (dot_name, flag_name, glob_name,
325 else if (pass->properties_provided & PROP_trees)
327 flag_name = concat ("tree-", pass->name, num, NULL);
328 glob_name = concat ("tree-", pass->name, NULL);
329 pass->static_pass_number = dump_register (dot_name, flag_name, glob_name,
330 TDF_TREE, n + TDI_tree_all, 0);
334 flag_name = concat ("rtl-", pass->name, num, NULL);
335 glob_name = concat ("rtl-", pass->name, NULL);
336 pass->static_pass_number = dump_register (dot_name, flag_name, glob_name,
337 TDF_RTL, n, pass->letter);
342 register_dump_files (struct tree_opt_pass *pass, bool ipa, int properties)
350 pass->properties_required = properties;
352 (properties | pass->properties_provided) & ~pass->properties_destroyed;
354 /* Reset the counter when we reach RTL-based passes. */
355 if ((new_properties ^ pass->properties_required) & PROP_rtl)
363 new_properties = register_dump_files (pass->sub, false, new_properties);
365 /* If we have a gate, combine the properties that we could have with
366 and without the pass being examined. */
368 properties &= new_properties;
370 properties = new_properties;
372 pass->properties_provided = properties;
374 register_one_dump_file (pass, ipa, pass_number);
383 /* Add a pass to the pass list. Duplicate the pass if it's already
386 static struct tree_opt_pass **
387 next_pass_1 (struct tree_opt_pass **list, struct tree_opt_pass *pass)
390 /* A nonzero static_pass_number indicates that the
391 pass is already in the list. */
392 if (pass->static_pass_number)
394 struct tree_opt_pass *new;
396 new = xmalloc (sizeof (*new));
397 memcpy (new, pass, sizeof (*new));
399 /* Indicate to register_dump_files that this pass has duplicates,
400 and so it should rename the dump file. The first instance will
401 be -1, and be number of duplicates = -static_pass_number - 1.
402 Subsequent instances will be > 0 and just the duplicate number. */
405 pass->static_pass_number -= 1;
406 new->static_pass_number = -pass->static_pass_number;
413 pass->static_pass_number = -1;
417 return &(*list)->next;
421 /* Construct the pass tree. */
424 init_optimization_passes (void)
426 struct tree_opt_pass **p;
428 #define NEXT_PASS(PASS) (p = next_pass_1 (p, &PASS))
429 /* Interprocedural optimization passes. */
431 NEXT_PASS (pass_early_ipa_inline);
432 NEXT_PASS (pass_early_local_passes);
433 NEXT_PASS (pass_ipa_inline);
436 /* All passes needed to lower the function into shape optimizers can operate
437 on. These passes are performed before interprocedural passes, unlike rest
438 of local passes (all_passes). */
439 p = &all_lowering_passes;
440 NEXT_PASS (pass_remove_useless_stmts);
441 NEXT_PASS (pass_mudflap_1);
442 NEXT_PASS (pass_lower_cf);
443 NEXT_PASS (pass_lower_eh);
444 NEXT_PASS (pass_build_cfg);
445 NEXT_PASS (pass_lower_complex_O0);
446 NEXT_PASS (pass_lower_vector);
447 NEXT_PASS (pass_warn_function_return);
448 NEXT_PASS (pass_early_tree_profile);
451 p = &pass_early_local_passes.sub;
452 NEXT_PASS (pass_tree_profile);
453 NEXT_PASS (pass_cleanup_cfg);
454 NEXT_PASS (pass_rebuild_cgraph_edges);
458 NEXT_PASS (pass_fixup_cfg);
459 NEXT_PASS (pass_init_datastructures);
460 NEXT_PASS (pass_all_optimizations);
461 NEXT_PASS (pass_warn_function_noreturn);
462 NEXT_PASS (pass_mudflap_2);
463 NEXT_PASS (pass_free_datastructures);
464 NEXT_PASS (pass_free_cfg_annotations);
465 NEXT_PASS (pass_expand);
466 NEXT_PASS (pass_rest_of_compilation);
467 NEXT_PASS (pass_clean_state);
470 p = &pass_all_optimizations.sub;
471 NEXT_PASS (pass_referenced_vars);
472 NEXT_PASS (pass_create_structure_vars);
473 NEXT_PASS (pass_build_ssa);
474 NEXT_PASS (pass_build_pta);
475 NEXT_PASS (pass_may_alias);
476 NEXT_PASS (pass_return_slot);
477 NEXT_PASS (pass_del_pta);
478 NEXT_PASS (pass_rename_ssa_copies);
479 NEXT_PASS (pass_early_warn_uninitialized);
481 /* Initial scalar cleanups. */
482 NEXT_PASS (pass_ccp);
483 NEXT_PASS (pass_fre);
484 NEXT_PASS (pass_dce);
485 NEXT_PASS (pass_forwprop);
486 NEXT_PASS (pass_copy_prop);
487 NEXT_PASS (pass_vrp);
488 NEXT_PASS (pass_dce);
489 NEXT_PASS (pass_merge_phi);
490 NEXT_PASS (pass_dominator);
492 NEXT_PASS (pass_phiopt);
493 NEXT_PASS (pass_build_pta);
494 NEXT_PASS (pass_may_alias);
495 NEXT_PASS (pass_del_pta);
496 NEXT_PASS (pass_tail_recursion);
497 NEXT_PASS (pass_profile);
499 NEXT_PASS (pass_stdarg);
500 NEXT_PASS (pass_lower_complex);
501 NEXT_PASS (pass_sra);
502 /* FIXME: SRA may generate arbitrary gimple code, exposing new
503 aliased and call-clobbered variables. As mentioned below,
504 pass_may_alias should be a TODO item. */
505 NEXT_PASS (pass_may_alias);
506 NEXT_PASS (pass_rename_ssa_copies);
507 NEXT_PASS (pass_dominator);
508 NEXT_PASS (pass_copy_prop);
509 NEXT_PASS (pass_dce);
510 NEXT_PASS (pass_dse);
511 NEXT_PASS (pass_may_alias);
512 NEXT_PASS (pass_forwprop);
513 NEXT_PASS (pass_phiopt);
514 NEXT_PASS (pass_object_sizes);
515 NEXT_PASS (pass_store_ccp);
516 NEXT_PASS (pass_store_copy_prop);
517 NEXT_PASS (pass_fold_builtins);
518 /* FIXME: May alias should a TODO but for 4.0.0,
519 we add may_alias right after fold builtins
520 which can create arbitrary GIMPLE. */
521 NEXT_PASS (pass_may_alias);
522 NEXT_PASS (pass_cse_reciprocals);
523 NEXT_PASS (pass_split_crit_edges);
524 NEXT_PASS (pass_reassoc);
525 NEXT_PASS (pass_pre);
526 NEXT_PASS (pass_sink_code);
527 NEXT_PASS (pass_loop);
528 NEXT_PASS (pass_dominator);
529 NEXT_PASS (pass_copy_prop);
530 NEXT_PASS (pass_cd_dce);
532 /* FIXME: If DCE is not run before checking for uninitialized uses,
533 we may get false warnings (e.g., testsuite/gcc.dg/uninit-5.c).
534 However, this also causes us to misdiagnose cases that should be
535 real warnings (e.g., testsuite/gcc.dg/pr18501.c).
537 To fix the false positives in uninit-5.c, we would have to
538 account for the predicates protecting the set and the use of each
539 variable. Using a representation like Gated Single Assignment
541 NEXT_PASS (pass_late_warn_uninitialized);
542 NEXT_PASS (pass_dse);
543 NEXT_PASS (pass_forwprop);
544 NEXT_PASS (pass_phiopt);
545 NEXT_PASS (pass_tail_calls);
546 NEXT_PASS (pass_rename_ssa_copies);
547 NEXT_PASS (pass_uncprop);
548 NEXT_PASS (pass_del_ssa);
549 NEXT_PASS (pass_nrv);
550 NEXT_PASS (pass_remove_useless_vars);
551 NEXT_PASS (pass_mark_used_blocks);
552 NEXT_PASS (pass_cleanup_cfg_post_optimizing);
556 NEXT_PASS (pass_loop_init);
557 NEXT_PASS (pass_copy_prop);
558 NEXT_PASS (pass_lim);
559 NEXT_PASS (pass_unswitch);
560 NEXT_PASS (pass_scev_cprop);
561 NEXT_PASS (pass_record_bounds);
562 NEXT_PASS (pass_linear_transform);
563 NEXT_PASS (pass_iv_canon);
564 NEXT_PASS (pass_if_conversion);
565 NEXT_PASS (pass_vectorize);
566 /* NEXT_PASS (pass_may_alias) cannot be done again because the
567 vectorizer creates alias relations that are not supported by
569 NEXT_PASS (pass_lower_vector_ssa);
570 NEXT_PASS (pass_complete_unroll);
571 NEXT_PASS (pass_iv_optimize);
572 NEXT_PASS (pass_loop_done);
575 p = &pass_rest_of_compilation.sub;
576 NEXT_PASS (pass_remove_unnecessary_notes);
577 NEXT_PASS (pass_init_function);
578 NEXT_PASS (pass_jump);
579 NEXT_PASS (pass_insn_locators_initialize);
580 NEXT_PASS (pass_rtl_eh);
581 NEXT_PASS (pass_initial_value_sets);
582 NEXT_PASS (pass_unshare_all_rtl);
583 NEXT_PASS (pass_instantiate_virtual_regs);
584 NEXT_PASS (pass_jump2);
585 NEXT_PASS (pass_cse);
586 NEXT_PASS (pass_gcse);
587 NEXT_PASS (pass_loop_optimize);
588 NEXT_PASS (pass_jump_bypass);
589 NEXT_PASS (pass_cfg);
590 NEXT_PASS (pass_profiling);
591 NEXT_PASS (pass_rtl_ifcvt);
592 NEXT_PASS (pass_tracer);
593 NEXT_PASS (pass_loop2);
594 NEXT_PASS (pass_web);
595 NEXT_PASS (pass_cse2);
596 NEXT_PASS (pass_life);
597 NEXT_PASS (pass_combine);
598 NEXT_PASS (pass_if_after_combine);
599 NEXT_PASS (pass_partition_blocks);
600 NEXT_PASS (pass_regmove);
601 NEXT_PASS (pass_split_all_insns);
602 NEXT_PASS (pass_mode_switching);
603 NEXT_PASS (pass_recompute_reg_usage);
604 NEXT_PASS (pass_sms);
605 NEXT_PASS (pass_sched);
606 NEXT_PASS (pass_local_alloc);
607 NEXT_PASS (pass_global_alloc);
608 NEXT_PASS (pass_postreload);
611 p = &pass_profiling.sub;
612 NEXT_PASS (pass_branch_prob);
613 NEXT_PASS (pass_value_profile_transformations);
614 NEXT_PASS (pass_remove_death_notes);
617 p = &pass_postreload.sub;
618 NEXT_PASS (pass_postreload_cse);
619 NEXT_PASS (pass_gcse2);
620 NEXT_PASS (pass_flow2);
621 NEXT_PASS (pass_stack_adjustments);
622 NEXT_PASS (pass_peephole2);
623 NEXT_PASS (pass_if_after_reload);
624 NEXT_PASS (pass_regrename);
625 NEXT_PASS (pass_reorder_blocks);
626 NEXT_PASS (pass_branch_target_load_optimize);
627 NEXT_PASS (pass_leaf_regs);
628 NEXT_PASS (pass_sched2);
629 NEXT_PASS (pass_split_before_regstack);
630 NEXT_PASS (pass_stack_regs);
631 NEXT_PASS (pass_compute_alignments);
632 NEXT_PASS (pass_duplicate_computed_gotos);
633 NEXT_PASS (pass_variable_tracking);
634 NEXT_PASS (pass_free_cfg);
635 NEXT_PASS (pass_machine_reorg);
636 NEXT_PASS (pass_purge_lineno_notes);
637 NEXT_PASS (pass_cleanup_barriers);
638 NEXT_PASS (pass_delay_slots);
639 NEXT_PASS (pass_split_for_shorten_branches);
640 NEXT_PASS (pass_convert_to_eh_region_ranges);
641 NEXT_PASS (pass_shorten_branches);
642 NEXT_PASS (pass_set_nothrow_function_flags);
643 NEXT_PASS (pass_final);
648 /* Register the passes with the tree dump code. */
649 register_dump_files (all_lowering_passes, false, PROP_gimple_any);
650 register_dump_files (all_passes, false, PROP_gimple_leh
652 register_dump_files (all_ipa_passes, true, PROP_gimple_leh
656 static unsigned int last_verified;
659 execute_todo (struct tree_opt_pass *pass, unsigned int flags, bool use_required)
662 = use_required ? pass->properties_required : pass->properties_provided;
664 #if defined ENABLE_CHECKING
665 if (need_ssa_update_p ())
666 gcc_assert (flags & TODO_update_ssa_any);
669 /* Always cleanup the CFG before doing anything else. */
670 if (flags & TODO_cleanup_cfg)
673 cleanup_tree_cfg_loop ();
678 if (flags & TODO_update_ssa_any)
680 unsigned update_flags = flags & TODO_update_ssa_any;
681 update_ssa (update_flags);
684 if ((flags & TODO_dump_func)
685 && dump_file && current_function_decl)
687 if (properties & PROP_trees)
688 dump_function_to_file (current_function_decl,
689 dump_file, dump_flags);
690 else if (properties & PROP_cfg)
691 print_rtl_with_bb (dump_file, get_insns ());
693 print_rtl (dump_file, get_insns ());
695 /* Flush the file. If verification fails, we won't be able to
696 close the file before aborting. */
699 if ((flags & TODO_dump_cgraph)
700 && dump_file && !current_function_decl)
702 dump_cgraph (dump_file);
703 /* Flush the file. If verification fails, we won't be able to
704 close the file before aborting. */
708 if (flags & TODO_ggc_collect)
713 #if defined ENABLE_CHECKING
714 if ((pass->properties_required & PROP_ssa)
715 && !(pass->properties_destroyed & PROP_ssa))
717 if (flags & TODO_verify_flow)
719 if (flags & TODO_verify_stmts)
721 if (flags & TODO_verify_loops)
722 verify_loop_closed_ssa ();
727 execute_one_pass (struct tree_opt_pass *pass)
731 /* See if we're supposed to run this pass. */
732 if (pass->gate && !pass->gate ())
735 /* Note that the folders should only create gimple expressions.
736 This is a hack until the new folder is ready. */
737 in_gimple_form = (pass->properties_provided & PROP_trees) != 0;
739 /* Run pre-pass verification. */
740 todo = pass->todo_flags_start & ~last_verified;
742 execute_todo (pass, todo, true);
744 /* If a dump file name is present, open it if enabled. */
745 if (pass->static_pass_number != -1)
747 bool initializing_dump = !dump_initialized_p (pass->static_pass_number);
748 dump_file_name = get_dump_file_name (pass->static_pass_number);
749 dump_file = dump_begin (pass->static_pass_number, &dump_flags);
750 if (dump_file && current_function_decl)
752 const char *dname, *aname;
753 dname = lang_hooks.decl_printable_name (current_function_decl, 2);
754 aname = (IDENTIFIER_POINTER
755 (DECL_ASSEMBLER_NAME (current_function_decl)));
756 fprintf (dump_file, "\n;; Function %s (%s)%s\n\n", dname, aname,
757 cfun->function_frequency == FUNCTION_FREQUENCY_HOT
759 : cfun->function_frequency == FUNCTION_FREQUENCY_UNLIKELY_EXECUTED
760 ? " (unlikely executed)"
764 if (initializing_dump
765 && graph_dump_format != no_graph
766 && (pass->properties_provided & (PROP_cfg | PROP_rtl))
767 == (PROP_cfg | PROP_rtl))
768 clean_graph_dump_file (dump_file_name);
771 /* If a timevar is present, start it. */
773 timevar_push (pass->tv_id);
781 timevar_pop (pass->tv_id);
783 /* Run post-pass cleanup and verification. */
784 todo = pass->todo_flags_finish;
785 last_verified = todo & TODO_verify_all;
787 execute_todo (pass, todo, false);
789 /* Flush and close dump file. */
792 free ((char *) dump_file_name);
793 dump_file_name = NULL;
797 dump_end (pass->static_pass_number, dump_file);
805 execute_pass_list (struct tree_opt_pass *pass)
809 if (execute_one_pass (pass) && pass->sub)
810 execute_pass_list (pass->sub);
816 /* Same as execute_pass_list but assume that subpasses of IPA passes
819 execute_ipa_pass_list (struct tree_opt_pass *pass)
823 if (execute_one_pass (pass) && pass->sub)
825 struct cgraph_node *node;
826 for (node = cgraph_nodes; node; node = node->next)
829 push_cfun (DECL_STRUCT_FUNCTION (node->decl));
830 current_function_decl = node->decl;
831 execute_pass_list (pass->sub);
832 free_dominance_info (CDI_DOMINATORS);
833 free_dominance_info (CDI_POST_DOMINATORS);
834 current_function_decl = NULL;