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, 2006, 2007, 2008, 2009, 2010
4 Free Software Foundation, Inc.
6 This file is part of GCC.
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
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
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/>. */
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. */
29 #include "coretypes.h"
33 #ifdef HAVE_SYS_RESOURCE_H
34 # include <sys/resource.h>
37 #ifdef HAVE_SYS_TIMES_H
38 # include <sys/times.h>
47 #include "insn-attr.h"
48 #include "insn-config.h"
49 #include "insn-flags.h"
50 #include "hard-reg-set.h"
57 #include "basic-block.h"
63 #include "diagnostic-core.h"
66 #include "dwarf2asm.h"
67 #include "integrate.h"
70 #include "langhooks.h"
71 #include "cfglayout.h"
73 #include "hosthooks.h"
77 #include "value-prof.h"
78 #include "tree-inline.h"
79 #include "tree-flow.h"
80 #include "tree-pass.h"
81 #include "tree-dump.h"
84 #include "lto-streamer.h"
87 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
88 #include "dwarf2out.h"
91 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
95 #ifdef SDB_DEBUGGING_INFO
99 #ifdef XCOFF_DEBUGGING_INFO
100 #include "xcoffout.h" /* Needed for external data
101 declarations for e.g. AIX 4.x. */
104 /* This is used for debugging. It allows the current pass to printed
105 from anywhere in compilation.
106 The variable current_pass is also used for statistics and plugins. */
107 struct opt_pass
*current_pass
;
109 /* Call from anywhere to find out what pass this is. Useful for
110 printing out debugging information deep inside an service
113 print_current_pass (FILE *file
)
116 fprintf (file
, "current pass = %s (%d)\n",
117 current_pass
->name
, current_pass
->static_pass_number
);
119 fprintf (file
, "no current pass.\n");
123 /* Call from the debugger to get the current pass name. */
127 print_current_pass (stderr
);
132 /* Global variables used to communicate with passes. */
135 bool first_pass_instance
;
138 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
141 This does nothing for local (non-static) variables, unless the
142 variable is a register variable with DECL_ASSEMBLER_NAME set. In
143 that case, or if the variable is not an automatic, it sets up the
144 RTL and outputs any assembler code (label definition, storage
145 allocation and initialization).
147 DECL is the declaration. TOP_LEVEL is nonzero
148 if this declaration is not within a function. */
151 rest_of_decl_compilation (tree decl
,
155 /* We deferred calling assemble_alias so that we could collect
156 other attributes such as visibility. Emit the alias now. */
159 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
));
162 alias
= TREE_VALUE (TREE_VALUE (alias
));
163 alias
= get_identifier (TREE_STRING_POINTER (alias
));
164 assemble_alias (decl
, alias
);
168 /* Can't defer this, because it needs to happen before any
169 later function definitions are processed. */
170 if (DECL_ASSEMBLER_NAME_SET_P (decl
) && DECL_REGISTER (decl
))
171 make_decl_rtl (decl
);
173 /* Forward declarations for nested functions are not "external",
174 but we need to treat them as if they were. */
175 if (TREE_STATIC (decl
) || DECL_EXTERNAL (decl
)
176 || TREE_CODE (decl
) == FUNCTION_DECL
)
178 timevar_push (TV_VARCONST
);
180 /* Don't output anything when a tentative file-scope definition
181 is seen. But at end of compilation, do output code for them.
183 We do output all variables and rely on
184 callgraph code to defer them except for forward declarations
185 (see gcc.c-torture/compile/920624-1.c) */
187 || !DECL_DEFER_OUTPUT (decl
)
188 || DECL_INITIAL (decl
))
189 && !DECL_EXTERNAL (decl
))
191 /* When reading LTO unit, we also read varpool, so do not
193 if (in_lto_p
&& !at_end
)
195 else if (TREE_CODE (decl
) != FUNCTION_DECL
)
196 varpool_finalize_decl (decl
);
199 #ifdef ASM_FINISH_DECLARE_OBJECT
200 if (decl
== last_assemble_variable_decl
)
202 ASM_FINISH_DECLARE_OBJECT (asm_out_file
, decl
,
207 timevar_pop (TV_VARCONST
);
209 else if (TREE_CODE (decl
) == TYPE_DECL
210 /* Like in rest_of_type_compilation, avoid confusing the debug
211 information machinery when there are errors. */
214 timevar_push (TV_SYMOUT
);
215 debug_hooks
->type_decl (decl
, !top_level
);
216 timevar_pop (TV_SYMOUT
);
219 /* Let cgraph know about the existence of variables. */
220 if (in_lto_p
&& !at_end
)
222 else if (TREE_CODE (decl
) == VAR_DECL
&& !DECL_EXTERNAL (decl
))
226 /* Called after finishing a record, union or enumeral type. */
229 rest_of_type_compilation (tree type
, int toplev
)
231 /* Avoid confusing the debug information machinery when there are
236 timevar_push (TV_SYMOUT
);
237 debug_hooks
->type_decl (TYPE_STUB_DECL (type
), !toplev
);
238 timevar_pop (TV_SYMOUT
);
244 finish_optimization_passes (void)
247 struct dump_file_info
*dfi
;
250 timevar_push (TV_DUMP
);
251 if (profile_arc_flag
|| flag_test_coverage
|| flag_branch_probabilities
)
253 dump_file
= dump_begin (pass_profile
.pass
.static_pass_number
, NULL
);
256 dump_end (pass_profile
.pass
.static_pass_number
, dump_file
);
261 dump_file
= dump_begin (pass_combine
.pass
.static_pass_number
, NULL
);
264 dump_combine_total_stats (dump_file
);
265 dump_end (pass_combine
.pass
.static_pass_number
, dump_file
);
269 /* Do whatever is necessary to finish printing the graphs. */
270 if (graph_dump_format
!= no_graph
)
271 for (i
= TDI_end
; (dfi
= get_dump_file_info (i
)) != NULL
; ++i
)
272 if (dump_initialized_p (i
)
273 && (dfi
->flags
& TDF_GRAPH
) != 0
274 && (name
= get_dump_file_name (i
)) != NULL
)
276 finish_graph_dump_file (name
);
280 timevar_pop (TV_DUMP
);
284 gate_rest_of_compilation (void)
286 /* Early return if there were errors. We can run afoul of our
287 consistency checks, and there's not really much point in fixing them. */
288 return !(rtl_dump_and_exit
|| flag_syntax_only
|| seen_error ());
291 struct gimple_opt_pass pass_rest_of_compilation
=
295 "*rest_of_compilation", /* name */
296 gate_rest_of_compilation
, /* gate */
300 0, /* static_pass_number */
301 TV_REST_OF_COMPILATION
, /* tv_id */
302 PROP_rtl
, /* properties_required */
303 0, /* properties_provided */
304 0, /* properties_destroyed */
305 0, /* todo_flags_start */
306 TODO_ggc_collect
/* todo_flags_finish */
311 gate_postreload (void)
313 return reload_completed
;
316 struct rtl_opt_pass pass_postreload
=
320 "*all-postreload", /* name */
321 gate_postreload
, /* gate */
325 0, /* static_pass_number */
327 PROP_rtl
, /* properties_required */
328 0, /* properties_provided */
329 0, /* properties_destroyed */
330 0, /* todo_flags_start */
331 TODO_ggc_collect
| TODO_verify_rtl_sharing
/* todo_flags_finish */
337 /* The root of the compilation pass tree, once constructed. */
338 struct opt_pass
*all_passes
, *all_small_ipa_passes
, *all_lowering_passes
,
339 *all_regular_ipa_passes
, *all_lto_gen_passes
;
341 /* This is used by plugins, and should also be used in register_pass. */
342 #define DEF_PASS_LIST(LIST) &LIST,
343 struct opt_pass
**gcc_pass_lists
[] = { GCC_PASS_LISTS NULL
};
346 /* A map from static pass id to optimization pass. */
347 struct opt_pass
**passes_by_id
;
348 int passes_by_id_size
;
350 /* Set the static pass number of pass PASS to ID and record that
351 in the mapping from static pass number to pass. */
354 set_pass_for_id (int id
, struct opt_pass
*pass
)
356 pass
->static_pass_number
= id
;
357 if (passes_by_id_size
<= id
)
359 passes_by_id
= XRESIZEVEC (struct opt_pass
*, passes_by_id
, id
+ 1);
360 memset (passes_by_id
+ passes_by_id_size
, 0,
361 (id
+ 1 - passes_by_id_size
) * sizeof (void *));
362 passes_by_id_size
= id
+ 1;
364 passes_by_id
[id
] = pass
;
367 /* Return the pass with the static pass number ID. */
370 get_pass_for_id (int id
)
372 if (id
>= passes_by_id_size
)
374 return passes_by_id
[id
];
377 /* Iterate over the pass tree allocating dump file numbers. We want
378 to do this depth first, and independent of whether the pass is
382 register_one_dump_file (struct opt_pass
*pass
)
384 char *dot_name
, *flag_name
, *glob_name
;
385 const char *name
, *prefix
;
389 /* See below in next_pass_1. */
391 if (pass
->static_pass_number
!= -1)
392 sprintf (num
, "%d", ((int) pass
->static_pass_number
< 0
393 ? 1 : pass
->static_pass_number
));
395 /* The name is both used to identify the pass for the purposes of plugins,
396 and to specify dump file name and option.
397 The latter two might want something short which is not quite unique; for
398 that reason, we may have a disambiguating prefix, followed by a space
399 to mark the start of the following dump file name / option string. */
400 name
= strchr (pass
->name
, ' ');
401 name
= name
? name
+ 1 : pass
->name
;
402 dot_name
= concat (".", name
, num
, NULL
);
403 if (pass
->type
== SIMPLE_IPA_PASS
|| pass
->type
== IPA_PASS
)
404 prefix
= "ipa-", flags
= TDF_IPA
;
405 else if (pass
->type
== GIMPLE_PASS
)
406 prefix
= "tree-", flags
= TDF_TREE
;
408 prefix
= "rtl-", flags
= TDF_RTL
;
410 flag_name
= concat (prefix
, name
, num
, NULL
);
411 glob_name
= concat (prefix
, name
, NULL
);
412 id
= dump_register (dot_name
, flag_name
, glob_name
, flags
);
413 set_pass_for_id (id
, pass
);
416 /* Recursive worker function for register_dump_files. */
419 register_dump_files_1 (struct opt_pass
*pass
, int properties
)
423 int new_properties
= (properties
| pass
->properties_provided
)
424 & ~pass
->properties_destroyed
;
426 if (pass
->name
&& pass
->name
[0] != '*')
427 register_one_dump_file (pass
);
430 new_properties
= register_dump_files_1 (pass
->sub
, new_properties
);
432 /* If we have a gate, combine the properties that we could have with
433 and without the pass being examined. */
435 properties
&= new_properties
;
437 properties
= new_properties
;
446 /* Register the dump files for the pipeline starting at PASS.
447 PROPERTIES reflects the properties that are guaranteed to be available at
448 the beginning of the pipeline. */
451 register_dump_files (struct opt_pass
*pass
,int properties
)
453 pass
->properties_required
|= properties
;
454 register_dump_files_1 (pass
, properties
);
457 /* Look at the static_pass_number and duplicate the pass
458 if it is already added to a list. */
460 static struct opt_pass
*
461 make_pass_instance (struct opt_pass
*pass
, bool track_duplicates
)
463 /* A nonzero static_pass_number indicates that the
464 pass is already in the list. */
465 if (pass
->static_pass_number
)
467 struct opt_pass
*new_pass
;
469 if (pass
->type
== GIMPLE_PASS
470 || pass
->type
== RTL_PASS
471 || pass
->type
== SIMPLE_IPA_PASS
)
473 new_pass
= XNEW (struct opt_pass
);
474 memcpy (new_pass
, pass
, sizeof (struct opt_pass
));
476 else if (pass
->type
== IPA_PASS
)
478 new_pass
= (struct opt_pass
*)XNEW (struct ipa_opt_pass_d
);
479 memcpy (new_pass
, pass
, sizeof (struct ipa_opt_pass_d
));
484 new_pass
->next
= NULL
;
486 new_pass
->todo_flags_start
&= ~TODO_mark_first_instance
;
488 /* Indicate to register_dump_files that this pass has duplicates,
489 and so it should rename the dump file. The first instance will
490 be -1, and be number of duplicates = -static_pass_number - 1.
491 Subsequent instances will be > 0 and just the duplicate number. */
492 if ((pass
->name
&& pass
->name
[0] != '*') || track_duplicates
)
494 pass
->static_pass_number
-= 1;
495 new_pass
->static_pass_number
= -pass
->static_pass_number
;
501 pass
->todo_flags_start
|= TODO_mark_first_instance
;
502 pass
->static_pass_number
= -1;
504 invoke_plugin_callbacks (PLUGIN_NEW_PASS
, pass
);
509 /* Add a pass to the pass list. Duplicate the pass if it's already
512 static struct opt_pass
**
513 next_pass_1 (struct opt_pass
**list
, struct opt_pass
*pass
)
515 /* Every pass should have a name so that plugins can refer to them. */
516 gcc_assert (pass
->name
!= NULL
);
518 *list
= make_pass_instance (pass
, false);
520 return &(*list
)->next
;
523 /* List node for an inserted pass instance. We need to keep track of all
524 the newly-added pass instances (with 'added_pass_nodes' defined below)
525 so that we can register their dump files after pass-positioning is finished.
526 Registering dumping files needs to be post-processed or the
527 static_pass_number of the opt_pass object would be modified and mess up
528 the dump file names of future pass instances to be added. */
530 struct pass_list_node
532 struct opt_pass
*pass
;
533 struct pass_list_node
*next
;
536 static struct pass_list_node
*added_pass_nodes
= NULL
;
537 static struct pass_list_node
*prev_added_pass_node
;
539 /* Insert the pass at the proper position. Return true if the pass
540 is successfully added.
542 NEW_PASS_INFO - new pass to be inserted
543 PASS_LIST - root of the pass list to insert the new pass to */
546 position_pass (struct register_pass_info
*new_pass_info
,
547 struct opt_pass
**pass_list
)
549 struct opt_pass
*pass
= *pass_list
, *prev_pass
= NULL
;
550 bool success
= false;
552 for ( ; pass
; prev_pass
= pass
, pass
= pass
->next
)
554 /* Check if the current pass is of the same type as the new pass and
555 matches the name and the instance number of the reference pass. */
556 if (pass
->type
== new_pass_info
->pass
->type
558 && !strcmp (pass
->name
, new_pass_info
->reference_pass_name
)
559 && ((new_pass_info
->ref_pass_instance_number
== 0)
560 || (new_pass_info
->ref_pass_instance_number
==
561 pass
->static_pass_number
)
562 || (new_pass_info
->ref_pass_instance_number
== 1
563 && pass
->todo_flags_start
& TODO_mark_first_instance
)))
565 struct opt_pass
*new_pass
;
566 struct pass_list_node
*new_pass_node
;
568 new_pass
= make_pass_instance (new_pass_info
->pass
, true);
570 /* Insert the new pass instance based on the positioning op. */
571 switch (new_pass_info
->pos_op
)
573 case PASS_POS_INSERT_AFTER
:
574 new_pass
->next
= pass
->next
;
575 pass
->next
= new_pass
;
577 /* Skip newly inserted pass to avoid repeated
578 insertions in the case where the new pass and the
579 existing one have the same name. */
582 case PASS_POS_INSERT_BEFORE
:
583 new_pass
->next
= pass
;
585 prev_pass
->next
= new_pass
;
587 *pass_list
= new_pass
;
589 case PASS_POS_REPLACE
:
590 new_pass
->next
= pass
->next
;
592 prev_pass
->next
= new_pass
;
594 *pass_list
= new_pass
;
595 new_pass
->sub
= pass
->sub
;
596 new_pass
->tv_id
= pass
->tv_id
;
600 error ("Invalid pass positioning operation");
604 /* Save the newly added pass (instance) in the added_pass_nodes
605 list so that we can register its dump file later. Note that
606 we cannot register the dump file now because doing so will modify
607 the static_pass_number of the opt_pass object and therefore
608 mess up the dump file name of future instances. */
609 new_pass_node
= XCNEW (struct pass_list_node
);
610 new_pass_node
->pass
= new_pass
;
611 if (!added_pass_nodes
)
612 added_pass_nodes
= new_pass_node
;
614 prev_added_pass_node
->next
= new_pass_node
;
615 prev_added_pass_node
= new_pass_node
;
620 if (pass
->sub
&& position_pass (new_pass_info
, &pass
->sub
))
627 /* Hooks a new pass into the pass lists.
629 PASS_INFO - pass information that specifies the opt_pass object,
630 reference pass, instance number, and how to position
634 register_pass (struct register_pass_info
*pass_info
)
636 bool all_instances
, success
;
638 /* The checks below could fail in buggy plugins. Existing GCC
639 passes should never fail these checks, so we mention plugin in
641 if (!pass_info
->pass
)
642 fatal_error ("plugin cannot register a missing pass");
644 if (!pass_info
->pass
->name
)
645 fatal_error ("plugin cannot register an unnamed pass");
647 if (!pass_info
->reference_pass_name
)
649 ("plugin cannot register pass %qs without reference pass name",
650 pass_info
->pass
->name
);
652 /* Try to insert the new pass to the pass lists. We need to check
653 all five lists as the reference pass could be in one (or all) of
655 all_instances
= pass_info
->ref_pass_instance_number
== 0;
656 success
= position_pass (pass_info
, &all_lowering_passes
);
657 if (!success
|| all_instances
)
658 success
|= position_pass (pass_info
, &all_small_ipa_passes
);
659 if (!success
|| all_instances
)
660 success
|= position_pass (pass_info
, &all_regular_ipa_passes
);
661 if (!success
|| all_instances
)
662 success
|= position_pass (pass_info
, &all_lto_gen_passes
);
663 if (!success
|| all_instances
)
664 success
|= position_pass (pass_info
, &all_passes
);
667 ("pass %qs not found but is referenced by new pass %qs",
668 pass_info
->reference_pass_name
, pass_info
->pass
->name
);
670 /* OK, we have successfully inserted the new pass. We need to register
671 the dump files for the newly added pass and its duplicates (if any).
672 Because the registration of plugin/backend passes happens after the
673 command-line options are parsed, the options that specify single
674 pass dumping (e.g. -fdump-tree-PASSNAME) cannot be used for new
675 passes. Therefore we currently can only enable dumping of
676 new passes when the 'dump-all' flags (e.g. -fdump-tree-all)
677 are specified. While doing so, we also delete the pass_list_node
678 objects created during pass positioning. */
679 while (added_pass_nodes
)
681 struct pass_list_node
*next_node
= added_pass_nodes
->next
;
682 enum tree_dump_index tdi
;
683 register_one_dump_file (added_pass_nodes
->pass
);
684 if (added_pass_nodes
->pass
->type
== SIMPLE_IPA_PASS
685 || added_pass_nodes
->pass
->type
== IPA_PASS
)
687 else if (added_pass_nodes
->pass
->type
== GIMPLE_PASS
)
691 /* Check if dump-all flag is specified. */
692 if (get_dump_file_info (tdi
)->state
)
693 get_dump_file_info (added_pass_nodes
->pass
->static_pass_number
)
694 ->state
= get_dump_file_info (tdi
)->state
;
695 XDELETE (added_pass_nodes
);
696 added_pass_nodes
= next_node
;
700 /* Construct the pass tree. The sequencing of passes is driven by
703 cgraph_finalize_compilation_unit ()
704 for each node N in the cgraph
705 cgraph_analyze_function (N)
706 cgraph_lower_function (N) -> all_lowering_passes
708 If we are optimizing, cgraph_optimize is then invoked:
711 ipa_passes () -> all_small_ipa_passes
712 cgraph_expand_all_functions ()
713 for each node N in the cgraph
714 cgraph_expand_function (N)
715 tree_rest_of_compilation (DECL (N)) -> all_passes
719 init_optimization_passes (void)
723 #define NEXT_PASS(PASS) (p = next_pass_1 (p, &((PASS).pass)))
725 /* All passes needed to lower the function into shape optimizers can
726 operate on. These passes are always run first on the function, but
727 backend might produce already lowered functions that are not processed
729 p
= &all_lowering_passes
;
730 NEXT_PASS (pass_warn_unused_result
);
731 NEXT_PASS (pass_diagnose_omp_blocks
);
732 NEXT_PASS (pass_mudflap_1
);
733 NEXT_PASS (pass_lower_omp
);
734 NEXT_PASS (pass_lower_cf
);
735 NEXT_PASS (pass_refactor_eh
);
736 NEXT_PASS (pass_lower_eh
);
737 NEXT_PASS (pass_build_cfg
);
738 NEXT_PASS (pass_lower_vector
);
739 NEXT_PASS (pass_warn_function_return
);
740 NEXT_PASS (pass_build_cgraph_edges
);
741 NEXT_PASS (pass_inline_parameters
);
744 /* Interprocedural optimization passes. */
745 p
= &all_small_ipa_passes
;
746 NEXT_PASS (pass_ipa_free_lang_data
);
747 NEXT_PASS (pass_ipa_function_and_variable_visibility
);
748 NEXT_PASS (pass_ipa_early_inline
);
750 struct opt_pass
**p
= &pass_ipa_early_inline
.pass
.sub
;
751 NEXT_PASS (pass_early_inline
);
752 NEXT_PASS (pass_inline_parameters
);
753 NEXT_PASS (pass_rebuild_cgraph_edges
);
755 NEXT_PASS (pass_early_local_passes
);
757 struct opt_pass
**p
= &pass_early_local_passes
.pass
.sub
;
758 NEXT_PASS (pass_fixup_cfg
);
759 NEXT_PASS (pass_tree_profile
);
760 NEXT_PASS (pass_cleanup_cfg
);
761 NEXT_PASS (pass_init_datastructures
);
762 NEXT_PASS (pass_expand_omp
);
764 NEXT_PASS (pass_referenced_vars
);
765 NEXT_PASS (pass_build_ssa
);
766 NEXT_PASS (pass_early_warn_uninitialized
);
767 /* Note that it is not strictly necessary to schedule an early
768 inline pass here. However, some test cases (e.g.,
769 g++.dg/other/p334435.C g++.dg/other/i386-1.C) expect extern
770 inline functions to be inlined even at -O0. This does not
771 happen during the first early inline pass. */
772 NEXT_PASS (pass_rebuild_cgraph_edges
);
773 NEXT_PASS (pass_early_inline
);
774 NEXT_PASS (pass_all_early_optimizations
);
776 struct opt_pass
**p
= &pass_all_early_optimizations
.pass
.sub
;
777 NEXT_PASS (pass_remove_cgraph_callee_edges
);
778 NEXT_PASS (pass_rename_ssa_copies
);
779 NEXT_PASS (pass_ccp
);
780 NEXT_PASS (pass_forwprop
);
781 /* pass_build_ealias is a dummy pass that ensures that we
782 execute TODO_rebuild_alias at this point. Re-building
783 alias information also rewrites no longer addressed
784 locals into SSA form if possible. */
785 NEXT_PASS (pass_build_ealias
);
786 NEXT_PASS (pass_sra_early
);
787 NEXT_PASS (pass_copy_prop
);
788 NEXT_PASS (pass_merge_phi
);
789 NEXT_PASS (pass_cd_dce
);
790 NEXT_PASS (pass_early_ipa_sra
);
791 NEXT_PASS (pass_tail_recursion
);
792 NEXT_PASS (pass_convert_switch
);
793 NEXT_PASS (pass_cleanup_eh
);
794 NEXT_PASS (pass_profile
);
795 NEXT_PASS (pass_local_pure_const
);
796 /* Split functions creates parts that are not run through
797 early optimizations again. It is thus good idea to do this
799 NEXT_PASS (pass_split_functions
);
801 NEXT_PASS (pass_release_ssa_names
);
802 NEXT_PASS (pass_rebuild_cgraph_edges
);
803 NEXT_PASS (pass_inline_parameters
);
805 NEXT_PASS (pass_ipa_increase_alignment
);
806 NEXT_PASS (pass_ipa_matrix_reorg
);
807 NEXT_PASS (pass_ipa_lower_emutls
);
810 p
= &all_regular_ipa_passes
;
811 NEXT_PASS (pass_ipa_whole_program_visibility
);
812 NEXT_PASS (pass_ipa_profile
);
813 NEXT_PASS (pass_ipa_cp
);
814 NEXT_PASS (pass_ipa_inline
);
815 NEXT_PASS (pass_ipa_pure_const
);
816 NEXT_PASS (pass_ipa_reference
);
817 NEXT_PASS (pass_ipa_type_escape
);
818 NEXT_PASS (pass_ipa_pta
);
819 NEXT_PASS (pass_ipa_struct_reorg
);
822 p
= &all_lto_gen_passes
;
823 NEXT_PASS (pass_ipa_lto_gimple_out
);
824 NEXT_PASS (pass_ipa_lto_finish_out
); /* This must be the last LTO pass. */
827 /* These passes are run after IPA passes on every function that is being
828 output to the assembler file. */
830 NEXT_PASS (pass_lower_eh_dispatch
);
831 NEXT_PASS (pass_all_optimizations
);
833 struct opt_pass
**p
= &pass_all_optimizations
.pass
.sub
;
834 NEXT_PASS (pass_remove_cgraph_callee_edges
);
835 /* Initial scalar cleanups before alias computation.
836 They ensure memory accesses are not indirect wherever possible. */
837 NEXT_PASS (pass_strip_predict_hints
);
838 NEXT_PASS (pass_update_address_taken
);
839 NEXT_PASS (pass_rename_ssa_copies
);
840 NEXT_PASS (pass_complete_unrolli
);
841 NEXT_PASS (pass_ccp
);
842 NEXT_PASS (pass_forwprop
);
843 NEXT_PASS (pass_call_cdce
);
844 /* pass_build_alias is a dummy pass that ensures that we
845 execute TODO_rebuild_alias at this point. Re-building
846 alias information also rewrites no longer addressed
847 locals into SSA form if possible. */
848 NEXT_PASS (pass_build_alias
);
849 NEXT_PASS (pass_return_slot
);
850 NEXT_PASS (pass_phiprop
);
851 NEXT_PASS (pass_fre
);
852 NEXT_PASS (pass_copy_prop
);
853 NEXT_PASS (pass_merge_phi
);
854 NEXT_PASS (pass_vrp
);
855 NEXT_PASS (pass_dce
);
856 NEXT_PASS (pass_cselim
);
857 NEXT_PASS (pass_tree_ifcombine
);
858 NEXT_PASS (pass_phiopt
);
859 NEXT_PASS (pass_tail_recursion
);
861 NEXT_PASS (pass_stdarg
);
862 NEXT_PASS (pass_lower_complex
);
863 NEXT_PASS (pass_sra
);
864 NEXT_PASS (pass_rename_ssa_copies
);
865 /* The dom pass will also resolve all __builtin_constant_p calls
866 that are still there to 0. This has to be done after some
867 propagations have already run, but before some more dead code
868 is removed, and this place fits nicely. Remember this when
869 trying to move or duplicate pass_dominator somewhere earlier. */
870 NEXT_PASS (pass_dominator
);
871 /* The only const/copy propagation opportunities left after
872 DOM should be due to degenerate PHI nodes. So rather than
873 run the full propagators, run a specialized pass which
874 only examines PHIs to discover const/copy propagation
876 NEXT_PASS (pass_phi_only_cprop
);
877 NEXT_PASS (pass_dse
);
878 NEXT_PASS (pass_reassoc
);
879 NEXT_PASS (pass_dce
);
880 NEXT_PASS (pass_forwprop
);
881 NEXT_PASS (pass_phiopt
);
882 NEXT_PASS (pass_object_sizes
);
883 NEXT_PASS (pass_ccp
);
884 NEXT_PASS (pass_copy_prop
);
885 NEXT_PASS (pass_cse_sincos
);
886 NEXT_PASS (pass_optimize_bswap
);
887 NEXT_PASS (pass_split_crit_edges
);
888 NEXT_PASS (pass_pre
);
889 NEXT_PASS (pass_sink_code
);
890 NEXT_PASS (pass_tree_loop
);
892 struct opt_pass
**p
= &pass_tree_loop
.pass
.sub
;
893 NEXT_PASS (pass_tree_loop_init
);
894 NEXT_PASS (pass_lim
);
895 NEXT_PASS (pass_copy_prop
);
896 NEXT_PASS (pass_dce_loop
);
897 NEXT_PASS (pass_tree_unswitch
);
898 NEXT_PASS (pass_scev_cprop
);
899 NEXT_PASS (pass_record_bounds
);
900 NEXT_PASS (pass_check_data_deps
);
901 NEXT_PASS (pass_loop_distribution
);
902 NEXT_PASS (pass_linear_transform
);
903 NEXT_PASS (pass_copy_prop
);
904 NEXT_PASS (pass_graphite
);
906 struct opt_pass
**p
= &pass_graphite
.pass
.sub
;
907 NEXT_PASS (pass_copy_prop
);
908 NEXT_PASS (pass_graphite_transforms
);
909 NEXT_PASS (pass_copy_prop
);
910 NEXT_PASS (pass_dce_loop
);
911 NEXT_PASS (pass_lim
);
913 NEXT_PASS (pass_iv_canon
);
914 NEXT_PASS (pass_if_conversion
);
915 NEXT_PASS (pass_vectorize
);
917 struct opt_pass
**p
= &pass_vectorize
.pass
.sub
;
918 NEXT_PASS (pass_lower_vector_ssa
);
919 NEXT_PASS (pass_dce_loop
);
921 NEXT_PASS (pass_predcom
);
922 NEXT_PASS (pass_complete_unroll
);
923 NEXT_PASS (pass_slp_vectorize
);
924 NEXT_PASS (pass_parallelize_loops
);
925 NEXT_PASS (pass_loop_prefetch
);
926 NEXT_PASS (pass_iv_optimize
);
927 NEXT_PASS (pass_tree_loop_done
);
929 NEXT_PASS (pass_cse_reciprocals
);
930 NEXT_PASS (pass_reassoc
);
931 NEXT_PASS (pass_vrp
);
932 NEXT_PASS (pass_dominator
);
933 /* The only const/copy propagation opportunities left after
934 DOM should be due to degenerate PHI nodes. So rather than
935 run the full propagators, run a specialized pass which
936 only examines PHIs to discover const/copy propagation
938 NEXT_PASS (pass_phi_only_cprop
);
939 NEXT_PASS (pass_cd_dce
);
940 NEXT_PASS (pass_tracer
);
942 /* FIXME: If DCE is not run before checking for uninitialized uses,
943 we may get false warnings (e.g., testsuite/gcc.dg/uninit-5.c).
944 However, this also causes us to misdiagnose cases that should be
945 real warnings (e.g., testsuite/gcc.dg/pr18501.c).
947 To fix the false positives in uninit-5.c, we would have to
948 account for the predicates protecting the set and the use of each
949 variable. Using a representation like Gated Single Assignment
951 NEXT_PASS (pass_late_warn_uninitialized
);
952 NEXT_PASS (pass_dse
);
953 NEXT_PASS (pass_forwprop
);
954 NEXT_PASS (pass_phiopt
);
955 NEXT_PASS (pass_fold_builtins
);
956 NEXT_PASS (pass_optimize_widening_mul
);
957 NEXT_PASS (pass_tail_calls
);
958 NEXT_PASS (pass_rename_ssa_copies
);
959 NEXT_PASS (pass_uncprop
);
960 NEXT_PASS (pass_local_pure_const
);
962 NEXT_PASS (pass_lower_complex_O0
);
963 NEXT_PASS (pass_cleanup_eh
);
964 NEXT_PASS (pass_lower_resx
);
965 NEXT_PASS (pass_nrv
);
966 NEXT_PASS (pass_mudflap_2
);
967 NEXT_PASS (pass_cleanup_cfg_post_optimizing
);
968 NEXT_PASS (pass_warn_function_noreturn
);
970 NEXT_PASS (pass_expand
);
972 NEXT_PASS (pass_rest_of_compilation
);
974 struct opt_pass
**p
= &pass_rest_of_compilation
.pass
.sub
;
975 NEXT_PASS (pass_init_function
);
976 NEXT_PASS (pass_jump
);
977 NEXT_PASS (pass_rtl_eh
);
978 NEXT_PASS (pass_initial_value_sets
);
979 NEXT_PASS (pass_unshare_all_rtl
);
980 NEXT_PASS (pass_instantiate_virtual_regs
);
981 NEXT_PASS (pass_into_cfg_layout_mode
);
982 NEXT_PASS (pass_jump2
);
983 NEXT_PASS (pass_lower_subreg
);
984 NEXT_PASS (pass_df_initialize_opt
);
985 NEXT_PASS (pass_cse
);
986 NEXT_PASS (pass_rtl_fwprop
);
987 NEXT_PASS (pass_rtl_cprop
);
988 NEXT_PASS (pass_rtl_pre
);
989 NEXT_PASS (pass_rtl_hoist
);
990 NEXT_PASS (pass_rtl_cprop
);
991 NEXT_PASS (pass_rtl_store_motion
);
992 NEXT_PASS (pass_cse_after_global_opts
);
993 NEXT_PASS (pass_rtl_ifcvt
);
994 NEXT_PASS (pass_reginfo_init
);
995 /* Perform loop optimizations. It might be better to do them a bit
996 sooner, but we want the profile feedback to work more
998 NEXT_PASS (pass_loop2
);
1000 struct opt_pass
**p
= &pass_loop2
.pass
.sub
;
1001 NEXT_PASS (pass_rtl_loop_init
);
1002 NEXT_PASS (pass_rtl_move_loop_invariants
);
1003 NEXT_PASS (pass_rtl_unswitch
);
1004 NEXT_PASS (pass_rtl_unroll_and_peel_loops
);
1005 NEXT_PASS (pass_rtl_doloop
);
1006 NEXT_PASS (pass_rtl_loop_done
);
1009 NEXT_PASS (pass_web
);
1010 NEXT_PASS (pass_rtl_cprop
);
1011 NEXT_PASS (pass_cse2
);
1012 NEXT_PASS (pass_rtl_dse1
);
1013 NEXT_PASS (pass_rtl_fwprop_addr
);
1014 NEXT_PASS (pass_inc_dec
);
1015 NEXT_PASS (pass_initialize_regs
);
1016 NEXT_PASS (pass_ud_rtl_dce
);
1017 NEXT_PASS (pass_combine
);
1018 NEXT_PASS (pass_if_after_combine
);
1019 NEXT_PASS (pass_partition_blocks
);
1020 NEXT_PASS (pass_regmove
);
1021 NEXT_PASS (pass_outof_cfg_layout_mode
);
1022 NEXT_PASS (pass_split_all_insns
);
1023 NEXT_PASS (pass_lower_subreg2
);
1024 NEXT_PASS (pass_df_initialize_no_opt
);
1025 NEXT_PASS (pass_stack_ptr_mod
);
1026 NEXT_PASS (pass_mode_switching
);
1027 NEXT_PASS (pass_match_asm_constraints
);
1028 NEXT_PASS (pass_sms
);
1029 NEXT_PASS (pass_sched
);
1030 NEXT_PASS (pass_ira
);
1031 NEXT_PASS (pass_postreload
);
1033 struct opt_pass
**p
= &pass_postreload
.pass
.sub
;
1034 NEXT_PASS (pass_postreload_cse
);
1035 NEXT_PASS (pass_gcse2
);
1036 NEXT_PASS (pass_split_after_reload
);
1037 NEXT_PASS (pass_implicit_zee
);
1038 NEXT_PASS (pass_branch_target_load_optimize1
);
1039 NEXT_PASS (pass_thread_prologue_and_epilogue
);
1040 NEXT_PASS (pass_rtl_dse2
);
1041 NEXT_PASS (pass_stack_adjustments
);
1042 NEXT_PASS (pass_peephole2
);
1043 NEXT_PASS (pass_if_after_reload
);
1044 NEXT_PASS (pass_regrename
);
1045 NEXT_PASS (pass_cprop_hardreg
);
1046 NEXT_PASS (pass_fast_rtl_dce
);
1047 NEXT_PASS (pass_reorder_blocks
);
1048 NEXT_PASS (pass_branch_target_load_optimize2
);
1049 NEXT_PASS (pass_leaf_regs
);
1050 NEXT_PASS (pass_split_before_sched2
);
1051 NEXT_PASS (pass_sched2
);
1052 NEXT_PASS (pass_stack_regs
);
1054 struct opt_pass
**p
= &pass_stack_regs
.pass
.sub
;
1055 NEXT_PASS (pass_split_before_regstack
);
1056 NEXT_PASS (pass_stack_regs_run
);
1058 NEXT_PASS (pass_compute_alignments
);
1059 NEXT_PASS (pass_duplicate_computed_gotos
);
1060 NEXT_PASS (pass_variable_tracking
);
1061 NEXT_PASS (pass_free_cfg
);
1062 NEXT_PASS (pass_machine_reorg
);
1063 NEXT_PASS (pass_cleanup_barriers
);
1064 NEXT_PASS (pass_delay_slots
);
1065 NEXT_PASS (pass_split_for_shorten_branches
);
1066 NEXT_PASS (pass_convert_to_eh_region_ranges
);
1067 NEXT_PASS (pass_shorten_branches
);
1068 NEXT_PASS (pass_set_nothrow_function_flags
);
1069 NEXT_PASS (pass_final
);
1071 NEXT_PASS (pass_df_finish
);
1073 NEXT_PASS (pass_clean_state
);
1078 /* Register the passes with the tree dump code. */
1079 register_dump_files (all_lowering_passes
, PROP_gimple_any
);
1080 register_dump_files (all_small_ipa_passes
,
1081 PROP_gimple_any
| PROP_gimple_lcf
| PROP_gimple_leh
1083 register_dump_files (all_regular_ipa_passes
,
1084 PROP_gimple_any
| PROP_gimple_lcf
| PROP_gimple_leh
1086 register_dump_files (all_lto_gen_passes
,
1087 PROP_gimple_any
| PROP_gimple_lcf
| PROP_gimple_leh
1089 register_dump_files (all_passes
,
1090 PROP_gimple_any
| PROP_gimple_lcf
| PROP_gimple_leh
1094 /* If we are in IPA mode (i.e., current_function_decl is NULL), call
1095 function CALLBACK for every function in the call graph. Otherwise,
1096 call CALLBACK on the current function. */
1099 do_per_function (void (*callback
) (void *data
), void *data
)
1101 if (current_function_decl
)
1105 struct cgraph_node
*node
;
1106 for (node
= cgraph_nodes
; node
; node
= node
->next
)
1107 if (node
->analyzed
&& gimple_has_body_p (node
->decl
)
1108 && (!node
->clone_of
|| node
->decl
!= node
->clone_of
->decl
))
1110 push_cfun (DECL_STRUCT_FUNCTION (node
->decl
));
1111 current_function_decl
= node
->decl
;
1115 free_dominance_info (CDI_DOMINATORS
);
1116 free_dominance_info (CDI_POST_DOMINATORS
);
1118 current_function_decl
= NULL
;
1125 /* Because inlining might remove no-longer reachable nodes, we need to
1126 keep the array visible to garbage collector to avoid reading collected
1129 static GTY ((length ("nnodes"))) cgraph_node_ptr
*order
;
1131 /* If we are in IPA mode (i.e., current_function_decl is NULL), call
1132 function CALLBACK for every function in the call graph. Otherwise,
1133 call CALLBACK on the current function.
1134 This function is global so that plugins can use it. */
1136 do_per_function_toporder (void (*callback
) (void *data
), void *data
)
1140 if (current_function_decl
)
1144 gcc_assert (!order
);
1145 order
= ggc_alloc_vec_cgraph_node_ptr (cgraph_n_nodes
);
1146 nnodes
= cgraph_postorder (order
);
1147 for (i
= nnodes
- 1; i
>= 0; i
--)
1148 order
[i
]->process
= 1;
1149 for (i
= nnodes
- 1; i
>= 0; i
--)
1151 struct cgraph_node
*node
= order
[i
];
1153 /* Allow possibly removed nodes to be garbage collected. */
1158 push_cfun (DECL_STRUCT_FUNCTION (node
->decl
));
1159 current_function_decl
= node
->decl
;
1161 free_dominance_info (CDI_DOMINATORS
);
1162 free_dominance_info (CDI_POST_DOMINATORS
);
1163 current_function_decl
= NULL
;
1174 /* Perform all TODO actions that ought to be done on each function. */
1177 execute_function_todo (void *data
)
1179 unsigned int flags
= (size_t)data
;
1180 flags
&= ~cfun
->last_verified
;
1184 /* Always cleanup the CFG before trying to update SSA. */
1185 if (flags
& TODO_cleanup_cfg
)
1187 bool cleanup
= cleanup_tree_cfg ();
1189 if (cleanup
&& (cfun
->curr_properties
& PROP_ssa
))
1190 flags
|= TODO_remove_unused_locals
;
1192 /* When cleanup_tree_cfg merges consecutive blocks, it may
1193 perform some simplistic propagation when removing single
1194 valued PHI nodes. This propagation may, in turn, cause the
1195 SSA form to become out-of-date (see PR 22037). So, even
1196 if the parent pass had not scheduled an SSA update, we may
1197 still need to do one. */
1198 if (!(flags
& TODO_update_ssa_any
) && need_ssa_update_p (cfun
))
1199 flags
|= TODO_update_ssa
;
1202 if (flags
& TODO_update_ssa_any
)
1204 unsigned update_flags
= flags
& TODO_update_ssa_any
;
1205 update_ssa (update_flags
);
1206 cfun
->last_verified
&= ~TODO_verify_ssa
;
1209 if (flags
& TODO_update_address_taken
)
1210 execute_update_addresses_taken (true);
1212 if (flags
& TODO_rebuild_alias
)
1214 if (!(flags
& TODO_update_address_taken
))
1215 execute_update_addresses_taken (true);
1216 compute_may_aliases ();
1219 if (flags
& TODO_remove_unused_locals
)
1220 remove_unused_locals ();
1222 if ((flags
& TODO_dump_func
) && dump_file
&& current_function_decl
)
1224 if (cfun
->curr_properties
& PROP_trees
)
1225 dump_function_to_file (current_function_decl
, dump_file
, dump_flags
);
1228 if (dump_flags
& TDF_SLIM
)
1229 print_rtl_slim_with_bb (dump_file
, get_insns (), dump_flags
);
1230 else if ((cfun
->curr_properties
& PROP_cfg
)
1231 && (dump_flags
& TDF_BLOCKS
))
1232 print_rtl_with_bb (dump_file
, get_insns ());
1234 print_rtl (dump_file
, get_insns ());
1236 if ((cfun
->curr_properties
& PROP_cfg
)
1237 && graph_dump_format
!= no_graph
1238 && (dump_flags
& TDF_GRAPH
))
1239 print_rtl_graph_with_bb (dump_file_name
, get_insns ());
1242 /* Flush the file. If verification fails, we won't be able to
1243 close the file before aborting. */
1247 if (flags
& TODO_rebuild_frequencies
)
1248 rebuild_frequencies ();
1250 #if defined ENABLE_CHECKING
1251 if (flags
& TODO_verify_ssa
1252 || (current_loops
&& loops_state_satisfies_p (LOOP_CLOSED_SSA
)))
1254 if (flags
& TODO_verify_flow
)
1255 verify_flow_info ();
1256 if (flags
& TODO_verify_stmts
)
1258 if (current_loops
&& loops_state_satisfies_p (LOOP_CLOSED_SSA
))
1259 verify_loop_closed_ssa (false);
1260 if (flags
& TODO_verify_rtl_sharing
)
1261 verify_rtl_sharing ();
1264 cfun
->last_verified
= flags
& TODO_verify_all
;
1267 /* Perform all TODO actions. */
1269 execute_todo (unsigned int flags
)
1271 #if defined ENABLE_CHECKING
1273 && need_ssa_update_p (cfun
))
1274 gcc_assert (flags
& TODO_update_ssa_any
);
1277 /* Inform the pass whether it is the first time it is run. */
1278 first_pass_instance
= (flags
& TODO_mark_first_instance
) != 0;
1280 statistics_fini_pass ();
1282 do_per_function (execute_function_todo
, (void *)(size_t) flags
);
1284 /* Always remove functions just as before inlining: IPA passes might be
1285 interested to see bodies of extern inline functions that are not inlined
1286 to analyze side effects. The full removal is done just at the end
1287 of IPA pass queue. */
1288 if (flags
& TODO_remove_functions
)
1291 cgraph_remove_unreachable_nodes (true, dump_file
);
1294 if ((flags
& TODO_dump_cgraph
) && dump_file
&& !current_function_decl
)
1297 dump_cgraph (dump_file
);
1298 /* Flush the file. If verification fails, we won't be able to
1299 close the file before aborting. */
1303 if (flags
& TODO_ggc_collect
)
1306 /* Now that the dumping has been done, we can get rid of the optional
1308 if (flags
& TODO_df_finish
)
1309 df_finish_pass ((flags
& TODO_df_verify
) != 0);
1312 /* Verify invariants that should hold between passes. This is a place
1313 to put simple sanity checks. */
1316 verify_interpass_invariants (void)
1318 #ifdef ENABLE_CHECKING
1319 gcc_assert (!fold_deferring_overflow_warnings_p ());
1323 /* Clear the last verified flag. */
1326 clear_last_verified (void *data ATTRIBUTE_UNUSED
)
1328 cfun
->last_verified
= 0;
1331 /* Helper function. Verify that the properties has been turn into the
1332 properties expected by the pass. */
1334 #ifdef ENABLE_CHECKING
1336 verify_curr_properties (void *data
)
1338 unsigned int props
= (size_t)data
;
1339 gcc_assert ((cfun
->curr_properties
& props
) == props
);
1343 /* Initialize pass dump file. */
1344 /* This is non-static so that the plugins can use it. */
1347 pass_init_dump_file (struct opt_pass
*pass
)
1349 /* If a dump file name is present, open it if enabled. */
1350 if (pass
->static_pass_number
!= -1)
1352 bool initializing_dump
= !dump_initialized_p (pass
->static_pass_number
);
1353 dump_file_name
= get_dump_file_name (pass
->static_pass_number
);
1354 dump_file
= dump_begin (pass
->static_pass_number
, &dump_flags
);
1355 if (dump_file
&& current_function_decl
)
1357 const char *dname
, *aname
;
1358 struct cgraph_node
*node
= cgraph_node (current_function_decl
);
1359 dname
= lang_hooks
.decl_printable_name (current_function_decl
, 2);
1360 aname
= (IDENTIFIER_POINTER
1361 (DECL_ASSEMBLER_NAME (current_function_decl
)));
1362 fprintf (dump_file
, "\n;; Function %s (%s)%s\n\n", dname
, aname
,
1363 node
->frequency
== NODE_FREQUENCY_HOT
1365 : node
->frequency
== NODE_FREQUENCY_UNLIKELY_EXECUTED
1366 ? " (unlikely executed)"
1367 : node
->frequency
== NODE_FREQUENCY_EXECUTED_ONCE
1368 ? " (executed once)"
1371 return initializing_dump
;
1377 /* Flush PASS dump file. */
1378 /* This is non-static so that plugins can use it. */
1381 pass_fini_dump_file (struct opt_pass
*pass
)
1383 /* Flush and close dump file. */
1386 free (CONST_CAST (char *, dump_file_name
));
1387 dump_file_name
= NULL
;
1392 dump_end (pass
->static_pass_number
, dump_file
);
1397 /* After executing the pass, apply expected changes to the function
1401 update_properties_after_pass (void *data
)
1403 struct opt_pass
*pass
= (struct opt_pass
*) data
;
1404 cfun
->curr_properties
= (cfun
->curr_properties
| pass
->properties_provided
)
1405 & ~pass
->properties_destroyed
;
1408 /* Execute summary generation for all of the passes in IPA_PASS. */
1411 execute_ipa_summary_passes (struct ipa_opt_pass_d
*ipa_pass
)
1415 struct opt_pass
*pass
= &ipa_pass
->pass
;
1417 /* Execute all of the IPA_PASSes in the list. */
1418 if (ipa_pass
->pass
.type
== IPA_PASS
1419 && (!pass
->gate
|| pass
->gate ())
1420 && ipa_pass
->generate_summary
)
1422 pass_init_dump_file (pass
);
1424 /* If a timevar is present, start it. */
1426 timevar_push (pass
->tv_id
);
1428 ipa_pass
->generate_summary ();
1432 timevar_pop (pass
->tv_id
);
1434 pass_fini_dump_file (pass
);
1436 ipa_pass
= (struct ipa_opt_pass_d
*)ipa_pass
->pass
.next
;
1440 /* Execute IPA_PASS function transform on NODE. */
1443 execute_one_ipa_transform_pass (struct cgraph_node
*node
,
1444 struct ipa_opt_pass_d
*ipa_pass
)
1446 struct opt_pass
*pass
= &ipa_pass
->pass
;
1447 unsigned int todo_after
= 0;
1449 current_pass
= pass
;
1450 if (!ipa_pass
->function_transform
)
1453 /* Note that the folders should only create gimple expressions.
1454 This is a hack until the new folder is ready. */
1455 in_gimple_form
= (cfun
&& (cfun
->curr_properties
& PROP_trees
)) != 0;
1457 pass_init_dump_file (pass
);
1459 /* Run pre-pass verification. */
1460 execute_todo (ipa_pass
->function_transform_todo_flags_start
);
1462 /* If a timevar is present, start it. */
1463 if (pass
->tv_id
!= TV_NONE
)
1464 timevar_push (pass
->tv_id
);
1467 todo_after
= ipa_pass
->function_transform (node
);
1470 if (pass
->tv_id
!= TV_NONE
)
1471 timevar_pop (pass
->tv_id
);
1473 /* Run post-pass cleanup and verification. */
1474 execute_todo (todo_after
);
1475 verify_interpass_invariants ();
1477 pass_fini_dump_file (pass
);
1479 current_pass
= NULL
;
1482 /* For the current function, execute all ipa transforms. */
1485 execute_all_ipa_transforms (void)
1487 struct cgraph_node
*node
;
1490 node
= cgraph_node (current_function_decl
);
1492 if (node
->ipa_transforms_to_apply
)
1496 for (i
= 0; i
< VEC_length (ipa_opt_pass
, node
->ipa_transforms_to_apply
);
1498 execute_one_ipa_transform_pass (node
,
1499 VEC_index (ipa_opt_pass
,
1500 node
->ipa_transforms_to_apply
,
1502 VEC_free (ipa_opt_pass
, heap
, node
->ipa_transforms_to_apply
);
1503 node
->ipa_transforms_to_apply
= NULL
;
1510 execute_one_pass (struct opt_pass
*pass
)
1512 bool initializing_dump
;
1513 unsigned int todo_after
= 0;
1517 /* IPA passes are executed on whole program, so cfun should be NULL.
1518 Other passes need function context set. */
1519 if (pass
->type
== SIMPLE_IPA_PASS
|| pass
->type
== IPA_PASS
)
1520 gcc_assert (!cfun
&& !current_function_decl
);
1522 gcc_assert (cfun
&& current_function_decl
);
1524 current_pass
= pass
;
1526 /* Check whether gate check should be avoided.
1527 User controls the value of the gate through the parameter "gate_status". */
1528 gate_status
= (pass
->gate
== NULL
) ? true : pass
->gate();
1530 /* Override gate with plugin. */
1531 invoke_plugin_callbacks (PLUGIN_OVERRIDE_GATE
, &gate_status
);
1535 current_pass
= NULL
;
1539 /* Pass execution event trigger: useful to identify passes being
1541 invoke_plugin_callbacks (PLUGIN_PASS_EXECUTION
, pass
);
1543 if (!quiet_flag
&& !cfun
)
1544 fprintf (stderr
, " <%s>", pass
->name
? pass
->name
: "");
1546 /* Note that the folders should only create gimple expressions.
1547 This is a hack until the new folder is ready. */
1548 in_gimple_form
= (cfun
&& (cfun
->curr_properties
& PROP_trees
)) != 0;
1550 initializing_dump
= pass_init_dump_file (pass
);
1552 /* Run pre-pass verification. */
1553 execute_todo (pass
->todo_flags_start
);
1555 #ifdef ENABLE_CHECKING
1556 do_per_function (verify_curr_properties
,
1557 (void *)(size_t)pass
->properties_required
);
1560 /* If a timevar is present, start it. */
1561 if (pass
->tv_id
!= TV_NONE
)
1562 timevar_push (pass
->tv_id
);
1567 todo_after
= pass
->execute ();
1568 do_per_function (clear_last_verified
, NULL
);
1572 if (pass
->tv_id
!= TV_NONE
)
1573 timevar_pop (pass
->tv_id
);
1575 do_per_function (update_properties_after_pass
, pass
);
1577 if (initializing_dump
1579 && graph_dump_format
!= no_graph
1581 && (cfun
->curr_properties
& (PROP_cfg
| PROP_rtl
))
1582 == (PROP_cfg
| PROP_rtl
))
1584 get_dump_file_info (pass
->static_pass_number
)->flags
|= TDF_GRAPH
;
1585 dump_flags
|= TDF_GRAPH
;
1586 clean_graph_dump_file (dump_file_name
);
1589 /* Run post-pass cleanup and verification. */
1590 execute_todo (todo_after
| pass
->todo_flags_finish
);
1591 verify_interpass_invariants ();
1592 if (pass
->type
== IPA_PASS
)
1594 struct cgraph_node
*node
;
1595 for (node
= cgraph_nodes
; node
; node
= node
->next
)
1597 VEC_safe_push (ipa_opt_pass
, heap
, node
->ipa_transforms_to_apply
,
1598 (struct ipa_opt_pass_d
*)pass
);
1601 if (!current_function_decl
)
1602 cgraph_process_new_functions ();
1604 pass_fini_dump_file (pass
);
1606 if (pass
->type
!= SIMPLE_IPA_PASS
&& pass
->type
!= IPA_PASS
)
1607 gcc_assert (!(cfun
->curr_properties
& PROP_trees
)
1608 || pass
->type
!= RTL_PASS
);
1610 current_pass
= NULL
;
1616 execute_pass_list (struct opt_pass
*pass
)
1620 gcc_assert (pass
->type
== GIMPLE_PASS
1621 || pass
->type
== RTL_PASS
);
1622 if (execute_one_pass (pass
) && pass
->sub
)
1623 execute_pass_list (pass
->sub
);
1629 /* Same as execute_pass_list but assume that subpasses of IPA passes
1630 are local passes. If SET is not NULL, write out summaries of only
1631 those node in SET. */
1634 ipa_write_summaries_2 (struct opt_pass
*pass
, cgraph_node_set set
,
1635 varpool_node_set vset
,
1636 struct lto_out_decl_state
*state
)
1640 struct ipa_opt_pass_d
*ipa_pass
= (struct ipa_opt_pass_d
*)pass
;
1641 gcc_assert (!current_function_decl
);
1643 gcc_assert (pass
->type
== SIMPLE_IPA_PASS
|| pass
->type
== IPA_PASS
);
1644 if (pass
->type
== IPA_PASS
1645 && ipa_pass
->write_summary
1646 && (!pass
->gate
|| pass
->gate ()))
1648 /* If a timevar is present, start it. */
1650 timevar_push (pass
->tv_id
);
1652 pass_init_dump_file (pass
);
1654 ipa_pass
->write_summary (set
,vset
);
1656 pass_fini_dump_file (pass
);
1658 /* If a timevar is present, start it. */
1660 timevar_pop (pass
->tv_id
);
1663 if (pass
->sub
&& pass
->sub
->type
!= GIMPLE_PASS
)
1664 ipa_write_summaries_2 (pass
->sub
, set
, vset
, state
);
1670 /* Helper function of ipa_write_summaries. Creates and destroys the
1671 decl state and calls ipa_write_summaries_2 for all passes that have
1672 summaries. SET is the set of nodes to be written. */
1675 ipa_write_summaries_1 (cgraph_node_set set
, varpool_node_set vset
)
1677 struct lto_out_decl_state
*state
= lto_new_out_decl_state ();
1678 compute_ltrans_boundary (state
, set
, vset
);
1680 lto_push_out_decl_state (state
);
1682 gcc_assert (!flag_wpa
);
1683 ipa_write_summaries_2 (all_regular_ipa_passes
, set
, vset
, state
);
1684 ipa_write_summaries_2 (all_lto_gen_passes
, set
, vset
, state
);
1686 gcc_assert (lto_get_out_decl_state () == state
);
1687 lto_pop_out_decl_state ();
1688 lto_delete_out_decl_state (state
);
1691 /* Write out summaries for all the nodes in the callgraph. */
1694 ipa_write_summaries (void)
1696 cgraph_node_set set
;
1697 varpool_node_set vset
;
1698 struct cgraph_node
**order
;
1699 struct varpool_node
*vnode
;
1702 if (!flag_generate_lto
|| seen_error ())
1705 set
= cgraph_node_set_new ();
1707 /* Create the callgraph set in the same order used in
1708 cgraph_expand_all_functions. This mostly facilitates debugging,
1709 since it causes the gimple file to be processed in the same order
1710 as the source code. */
1711 order
= XCNEWVEC (struct cgraph_node
*, cgraph_n_nodes
);
1712 order_pos
= cgraph_postorder (order
);
1713 gcc_assert (order_pos
== cgraph_n_nodes
);
1715 for (i
= order_pos
- 1; i
>= 0; i
--)
1717 struct cgraph_node
*node
= order
[i
];
1721 /* When streaming out references to statements as part of some IPA
1722 pass summary, the statements need to have uids assigned and the
1723 following does that for all the IPA passes here. Naturally, this
1724 ordering then matches the one IPA-passes get in their stmt_fixup
1727 push_cfun (DECL_STRUCT_FUNCTION (node
->decl
));
1728 renumber_gimple_stmt_uids ();
1732 cgraph_node_set_add (set
, node
);
1734 vset
= varpool_node_set_new ();
1736 for (vnode
= varpool_nodes
; vnode
; vnode
= vnode
->next
)
1737 if (vnode
->needed
&& !vnode
->alias
)
1738 varpool_node_set_add (vset
, vnode
);
1740 ipa_write_summaries_1 (set
, vset
);
1747 /* Same as execute_pass_list but assume that subpasses of IPA passes
1748 are local passes. If SET is not NULL, write out optimization summaries of
1749 only those node in SET. */
1752 ipa_write_optimization_summaries_1 (struct opt_pass
*pass
, cgraph_node_set set
,
1753 varpool_node_set vset
,
1754 struct lto_out_decl_state
*state
)
1758 struct ipa_opt_pass_d
*ipa_pass
= (struct ipa_opt_pass_d
*)pass
;
1759 gcc_assert (!current_function_decl
);
1761 gcc_assert (pass
->type
== SIMPLE_IPA_PASS
|| pass
->type
== IPA_PASS
);
1762 if (pass
->type
== IPA_PASS
1763 && ipa_pass
->write_optimization_summary
1764 && (!pass
->gate
|| pass
->gate ()))
1766 /* If a timevar is present, start it. */
1768 timevar_push (pass
->tv_id
);
1770 pass_init_dump_file (pass
);
1772 ipa_pass
->write_optimization_summary (set
, vset
);
1774 pass_fini_dump_file (pass
);
1776 /* If a timevar is present, start it. */
1778 timevar_pop (pass
->tv_id
);
1781 if (pass
->sub
&& pass
->sub
->type
!= GIMPLE_PASS
)
1782 ipa_write_optimization_summaries_1 (pass
->sub
, set
, vset
, state
);
1788 /* Write all the optimization summaries for the cgraph nodes in SET. If SET is
1789 NULL, write out all summaries of all nodes. */
1792 ipa_write_optimization_summaries (cgraph_node_set set
, varpool_node_set vset
)
1794 struct lto_out_decl_state
*state
= lto_new_out_decl_state ();
1795 compute_ltrans_boundary (state
, set
, vset
);
1797 lto_push_out_decl_state (state
);
1799 gcc_assert (flag_wpa
);
1800 ipa_write_optimization_summaries_1 (all_regular_ipa_passes
, set
, vset
, state
);
1801 ipa_write_optimization_summaries_1 (all_lto_gen_passes
, set
, vset
, state
);
1803 gcc_assert (lto_get_out_decl_state () == state
);
1804 lto_pop_out_decl_state ();
1805 lto_delete_out_decl_state (state
);
1808 /* Same as execute_pass_list but assume that subpasses of IPA passes
1809 are local passes. */
1812 ipa_read_summaries_1 (struct opt_pass
*pass
)
1816 struct ipa_opt_pass_d
*ipa_pass
= (struct ipa_opt_pass_d
*) pass
;
1818 gcc_assert (!current_function_decl
);
1820 gcc_assert (pass
->type
== SIMPLE_IPA_PASS
|| pass
->type
== IPA_PASS
);
1822 if (pass
->gate
== NULL
|| pass
->gate ())
1824 if (pass
->type
== IPA_PASS
&& ipa_pass
->read_summary
)
1826 /* If a timevar is present, start it. */
1828 timevar_push (pass
->tv_id
);
1830 pass_init_dump_file (pass
);
1832 ipa_pass
->read_summary ();
1834 pass_fini_dump_file (pass
);
1838 timevar_pop (pass
->tv_id
);
1841 if (pass
->sub
&& pass
->sub
->type
!= GIMPLE_PASS
)
1842 ipa_read_summaries_1 (pass
->sub
);
1849 /* Read all the summaries for all_regular_ipa_passes and all_lto_gen_passes. */
1852 ipa_read_summaries (void)
1854 ipa_read_summaries_1 (all_regular_ipa_passes
);
1855 ipa_read_summaries_1 (all_lto_gen_passes
);
1858 /* Same as execute_pass_list but assume that subpasses of IPA passes
1859 are local passes. */
1862 ipa_read_optimization_summaries_1 (struct opt_pass
*pass
)
1866 struct ipa_opt_pass_d
*ipa_pass
= (struct ipa_opt_pass_d
*) pass
;
1868 gcc_assert (!current_function_decl
);
1870 gcc_assert (pass
->type
== SIMPLE_IPA_PASS
|| pass
->type
== IPA_PASS
);
1872 if (pass
->gate
== NULL
|| pass
->gate ())
1874 if (pass
->type
== IPA_PASS
&& ipa_pass
->read_optimization_summary
)
1876 /* If a timevar is present, start it. */
1878 timevar_push (pass
->tv_id
);
1880 pass_init_dump_file (pass
);
1882 ipa_pass
->read_optimization_summary ();
1884 pass_fini_dump_file (pass
);
1888 timevar_pop (pass
->tv_id
);
1891 if (pass
->sub
&& pass
->sub
->type
!= GIMPLE_PASS
)
1892 ipa_read_optimization_summaries_1 (pass
->sub
);
1898 /* Read all the summaries for all_regular_ipa_passes and all_lto_gen_passes. */
1901 ipa_read_optimization_summaries (void)
1903 ipa_read_optimization_summaries_1 (all_regular_ipa_passes
);
1904 ipa_read_optimization_summaries_1 (all_lto_gen_passes
);
1907 /* Same as execute_pass_list but assume that subpasses of IPA passes
1908 are local passes. */
1910 execute_ipa_pass_list (struct opt_pass
*pass
)
1914 gcc_assert (!current_function_decl
);
1916 gcc_assert (pass
->type
== SIMPLE_IPA_PASS
|| pass
->type
== IPA_PASS
);
1917 if (execute_one_pass (pass
) && pass
->sub
)
1919 if (pass
->sub
->type
== GIMPLE_PASS
)
1921 invoke_plugin_callbacks (PLUGIN_EARLY_GIMPLE_PASSES_START
, NULL
);
1922 do_per_function_toporder ((void (*)(void *))execute_pass_list
,
1924 invoke_plugin_callbacks (PLUGIN_EARLY_GIMPLE_PASSES_END
, NULL
);
1926 else if (pass
->sub
->type
== SIMPLE_IPA_PASS
1927 || pass
->sub
->type
== IPA_PASS
)
1928 execute_ipa_pass_list (pass
->sub
);
1932 gcc_assert (!current_function_decl
);
1933 cgraph_process_new_functions ();
1939 /* Execute stmt fixup hooks of all passes in PASS for NODE and STMTS. */
1942 execute_ipa_stmt_fixups (struct opt_pass
*pass
,
1943 struct cgraph_node
*node
, gimple
*stmts
)
1947 /* Execute all of the IPA_PASSes in the list. */
1948 if (pass
->type
== IPA_PASS
1949 && (!pass
->gate
|| pass
->gate ()))
1951 struct ipa_opt_pass_d
*ipa_pass
= (struct ipa_opt_pass_d
*) pass
;
1953 if (ipa_pass
->stmt_fixup
)
1955 pass_init_dump_file (pass
);
1956 /* If a timevar is present, start it. */
1958 timevar_push (pass
->tv_id
);
1960 ipa_pass
->stmt_fixup (node
, stmts
);
1964 timevar_pop (pass
->tv_id
);
1965 pass_fini_dump_file (pass
);
1968 execute_ipa_stmt_fixups (pass
->sub
, node
, stmts
);
1974 /* Execute stmt fixup hooks of all IPA passes for NODE and STMTS. */
1977 execute_all_ipa_stmt_fixups (struct cgraph_node
*node
, gimple
*stmts
)
1979 execute_ipa_stmt_fixups (all_regular_ipa_passes
, node
, stmts
);
1983 extern void debug_properties (unsigned int);
1984 extern void dump_properties (FILE *, unsigned int);
1987 dump_properties (FILE *dump
, unsigned int props
)
1989 fprintf (dump
, "Properties:\n");
1990 if (props
& PROP_gimple_any
)
1991 fprintf (dump
, "PROP_gimple_any\n");
1992 if (props
& PROP_gimple_lcf
)
1993 fprintf (dump
, "PROP_gimple_lcf\n");
1994 if (props
& PROP_gimple_leh
)
1995 fprintf (dump
, "PROP_gimple_leh\n");
1996 if (props
& PROP_cfg
)
1997 fprintf (dump
, "PROP_cfg\n");
1998 if (props
& PROP_referenced_vars
)
1999 fprintf (dump
, "PROP_referenced_vars\n");
2000 if (props
& PROP_ssa
)
2001 fprintf (dump
, "PROP_ssa\n");
2002 if (props
& PROP_no_crit_edges
)
2003 fprintf (dump
, "PROP_no_crit_edges\n");
2004 if (props
& PROP_rtl
)
2005 fprintf (dump
, "PROP_rtl\n");
2006 if (props
& PROP_gimple_lomp
)
2007 fprintf (dump
, "PROP_gimple_lomp\n");
2008 if (props
& PROP_gimple_lcx
)
2009 fprintf (dump
, "PROP_gimple_lcx\n");
2010 if (props
& PROP_cfglayout
)
2011 fprintf (dump
, "PROP_cfglayout\n");
2015 debug_properties (unsigned int props
)
2017 dump_properties (stderr
, props
);
2020 /* Called by local passes to see if function is called by already processed nodes.
2021 Because we process nodes in topological order, this means that function is
2022 in recursive cycle or we introduced new direct calls. */
2024 function_called_by_processed_nodes_p (void)
2026 struct cgraph_edge
*e
;
2027 for (e
= cgraph_node (current_function_decl
)->callers
; e
; e
= e
->next_caller
)
2029 if (e
->caller
->decl
== current_function_decl
)
2031 if (!e
->caller
->analyzed
)
2033 if (TREE_ASM_WRITTEN (e
->caller
->decl
))
2035 if (!e
->caller
->process
&& !e
->caller
->global
.inlined_to
)
2040 fprintf (dump_file
, "Already processed call to:\n");
2041 dump_cgraph_node (dump_file
, e
->caller
);
2046 #include "gt-passes.h"