2 Copyright (C) 2003-2014 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
20 /* This file implements two related passes:
22 - pass_data_ipa_function_and_variable_visibility run just after
23 symbol table, references and callgraph are built
25 - pass_data_ipa_function_and_variable_visibility run as first
26 proper IPA pass (that is after early optimization, or, (with LTO)
27 as a first pass done at link-time.
29 Purpose of both passes is to set correctly visibility properties
30 of all symbols. This includes:
32 - Symbol privatization:
34 Some symbols that are declared public by frontend may be
35 turned local (either by -fwhole-program flag, by linker plugin feedback
38 - Discovery of local functions:
40 A local function is one whose calls can occur only in the current
41 compilation unit and all its calls are explicit, so we can change
42 its calling convention. We simply mark all static functions whose
43 address is not taken as local.
45 externally_visible flag is set for symbols that can not be privatized.
46 For privatized symbols we clear TREE_PUBLIC flag and dismantle comdat
49 - Dismantling of comdat groups:
51 Comdat group represent a section that may be replaced by linker by
52 a different copy of the same section from other unit.
53 If we have resolution information (from linker plugin) and we know that
54 a given comdat gorup is prevailing, we can dismantle it and turn symbols
55 into normal symbols. If the resolution information says that the
56 section was previaled by copy from non-LTO code, we can also dismantle
57 it and turn all symbols into external.
61 Some symbols can be interposed by dynamic linker. Refering to these
62 symbols is expensive, since it needs to be overwritable by the dynamic
63 linker. In some cases we know that the interposition does not change
64 semantic and we can always refer to a local copy (as in the case of
65 inline function). In this case we produce a local alias and redirect
68 TODO: This should be done for references, too.
70 - Removal of static ocnstructors and destructors that have no side effects.
72 - Regularization of several oddities introduced by frontends that may
73 be impractical later in the optimization queue. */
77 #include "coretypes.h"
81 #include "tree-pass.h"
82 #include "pointer-set.h"
84 #include "gimple-expr.h"
86 /* Return true when NODE can not be local. Worker for cgraph_local_node_p. */
89 cgraph_non_local_node_p_1 (struct cgraph_node
*node
, void *data ATTRIBUTE_UNUSED
)
91 /* FIXME: Aliases can be local, but i386 gets thunks wrong then. */
92 return !(cgraph_only_called_directly_or_aliased_p (node
)
93 && !ipa_ref_has_aliases_p (&node
->ref_list
)
95 && !DECL_EXTERNAL (node
->decl
)
96 && !node
->externally_visible
97 && !node
->used_from_other_partition
98 && !node
->in_other_partition
);
101 /* Return true when function can be marked local. */
104 cgraph_local_node_p (struct cgraph_node
*node
)
106 struct cgraph_node
*n
= cgraph_function_or_thunk_node (node
, NULL
);
108 /* FIXME: thunks can be considered local, but we need prevent i386
109 from attempting to change calling convention of them. */
110 if (n
->thunk
.thunk_p
)
112 return !cgraph_for_node_and_aliases (n
,
113 cgraph_non_local_node_p_1
, NULL
, true);
117 /* Return true when there is a reference to node and it is not vtable. */
119 address_taken_from_non_vtable_p (symtab_node
*node
)
123 for (i
= 0; ipa_ref_list_referring_iterate (&node
->ref_list
,
125 if (ref
->use
== IPA_REF_ADDR
)
128 if (is_a
<cgraph_node
*> (ref
->referring
))
130 node
= ipa_ref_referring_varpool_node (ref
);
131 if (!DECL_VIRTUAL_P (node
->decl
))
137 /* A helper for comdat_can_be_unshared_p. */
140 comdat_can_be_unshared_p_1 (symtab_node
*node
)
142 if (!node
->externally_visible
)
144 /* When address is taken, we don't know if equality comparison won't
145 break eventually. Exception are virutal functions, C++
146 constructors/destructors and vtables, where this is not possible by
147 language standard. */
148 if (!DECL_VIRTUAL_P (node
->decl
)
149 && (TREE_CODE (node
->decl
) != FUNCTION_DECL
150 || (!DECL_CXX_CONSTRUCTOR_P (node
->decl
)
151 && !DECL_CXX_DESTRUCTOR_P (node
->decl
)))
152 && address_taken_from_non_vtable_p (node
))
155 /* If the symbol is used in some weird way, better to not touch it. */
156 if (node
->force_output
)
159 /* Explicit instantiations needs to be output when possibly
161 if (node
->forced_by_abi
162 && TREE_PUBLIC (node
->decl
)
163 && (node
->resolution
!= LDPR_PREVAILING_DEF_IRONLY
164 && !flag_whole_program
))
167 /* Non-readonly and volatile variables can not be duplicated. */
168 if (is_a
<varpool_node
*> (node
)
169 && (!TREE_READONLY (node
->decl
)
170 || TREE_THIS_VOLATILE (node
->decl
)))
175 /* COMDAT functions must be shared only if they have address taken,
176 otherwise we can produce our own private implementation with
178 Return true when turning COMDAT functoin static can not lead to wrong
179 code when the resulting object links with a library defining same COMDAT.
181 Virtual functions do have their addresses taken from the vtables,
182 but in C++ there is no way to compare their addresses for equality. */
185 comdat_can_be_unshared_p (symtab_node
*node
)
187 if (!comdat_can_be_unshared_p_1 (node
))
189 if (node
->same_comdat_group
)
193 /* If more than one function is in the same COMDAT group, it must
194 be shared even if just one function in the comdat group has
196 for (next
= node
->same_comdat_group
;
197 next
!= node
; next
= next
->same_comdat_group
)
198 if (!comdat_can_be_unshared_p_1 (next
))
204 /* Return true when function NODE should be considered externally visible. */
207 cgraph_externally_visible_p (struct cgraph_node
*node
,
210 if (!node
->definition
)
212 if (!TREE_PUBLIC (node
->decl
)
213 || DECL_EXTERNAL (node
->decl
))
216 /* Do not try to localize built-in functions yet. One of problems is that we
217 end up mangling their asm for WHOPR that makes it impossible to call them
218 using the implicit built-in declarations anymore. Similarly this enables
219 us to remove them as unreachable before actual calls may appear during
220 expansion or folding. */
221 if (DECL_BUILT_IN (node
->decl
))
224 /* If linker counts on us, we must preserve the function. */
225 if (symtab_used_from_object_file_p (node
))
227 if (DECL_PRESERVE_P (node
->decl
))
229 if (lookup_attribute ("externally_visible",
230 DECL_ATTRIBUTES (node
->decl
)))
232 if (TARGET_DLLIMPORT_DECL_ATTRIBUTES
233 && lookup_attribute ("dllexport",
234 DECL_ATTRIBUTES (node
->decl
)))
236 if (node
->resolution
== LDPR_PREVAILING_DEF_IRONLY
)
238 /* When doing LTO or whole program, we can bring COMDAT functoins static.
239 This improves code quality and we know we will duplicate them at most twice
240 (in the case that we are not using plugin and link with object file
241 implementing same COMDAT) */
242 if ((in_lto_p
|| whole_program
)
243 && DECL_COMDAT (node
->decl
)
244 && comdat_can_be_unshared_p (node
))
247 /* When doing link time optimizations, hidden symbols become local. */
249 && (DECL_VISIBILITY (node
->decl
) == VISIBILITY_HIDDEN
250 || DECL_VISIBILITY (node
->decl
) == VISIBILITY_INTERNAL
)
251 /* Be sure that node is defined in IR file, not in other object
252 file. In that case we don't set used_from_other_object_file. */
255 else if (!whole_program
)
258 if (MAIN_NAME_P (DECL_NAME (node
->decl
)))
264 /* Return true when variable VNODE should be considered externally visible. */
267 varpool_externally_visible_p (varpool_node
*vnode
)
269 if (DECL_EXTERNAL (vnode
->decl
))
272 if (!TREE_PUBLIC (vnode
->decl
))
275 /* If linker counts on us, we must preserve the function. */
276 if (symtab_used_from_object_file_p (vnode
))
279 if (DECL_HARD_REGISTER (vnode
->decl
))
281 if (DECL_PRESERVE_P (vnode
->decl
))
283 if (lookup_attribute ("externally_visible",
284 DECL_ATTRIBUTES (vnode
->decl
)))
286 if (TARGET_DLLIMPORT_DECL_ATTRIBUTES
287 && lookup_attribute ("dllexport",
288 DECL_ATTRIBUTES (vnode
->decl
)))
291 /* See if we have linker information about symbol not being used or
292 if we need to make guess based on the declaration.
294 Even if the linker clams the symbol is unused, never bring internal
295 symbols that are declared by user as used or externally visible.
296 This is needed for i.e. references from asm statements. */
297 if (symtab_used_from_object_file_p (vnode
))
299 if (vnode
->resolution
== LDPR_PREVAILING_DEF_IRONLY
)
302 /* As a special case, the COMDAT virtual tables can be unshared.
303 In LTO mode turn vtables into static variables. The variable is readonly,
304 so this does not enable more optimization, but referring static var
305 is faster for dynamic linking. Also this match logic hidding vtables
306 from LTO symbol tables. */
307 if ((in_lto_p
|| flag_whole_program
)
308 && DECL_COMDAT (vnode
->decl
)
309 && comdat_can_be_unshared_p (vnode
))
312 /* When doing link time optimizations, hidden symbols become local. */
314 && (DECL_VISIBILITY (vnode
->decl
) == VISIBILITY_HIDDEN
315 || DECL_VISIBILITY (vnode
->decl
) == VISIBILITY_INTERNAL
)
316 /* Be sure that node is defined in IR file, not in other object
317 file. In that case we don't set used_from_other_object_file. */
318 && vnode
->definition
)
320 else if (!flag_whole_program
)
323 /* Do not attempt to privatize COMDATS by default.
324 This would break linking with C++ libraries sharing
327 FIXME: We can do so for readonly vars with no address taken and
328 possibly also for vtables since no direct pointer comparsion is done.
329 It might be interesting to do so to reduce linking overhead. */
330 if (DECL_COMDAT (vnode
->decl
) || DECL_WEAK (vnode
->decl
))
335 /* Return true if reference to NODE can be replaced by a local alias.
336 Local aliases save dynamic linking overhead and enable more optimizations.
340 can_replace_by_local_alias (symtab_node
*node
)
342 return (symtab_node_availability (node
) > AVAIL_OVERWRITABLE
343 && !symtab_can_be_discarded (node
));
346 /* In LTO we can remove COMDAT groups and weak symbols.
347 Either turn them into normal symbols or external symbol depending on
351 update_visibility_by_resolution_info (symtab_node
* node
)
355 if (!node
->externally_visible
356 || (!DECL_WEAK (node
->decl
) && !DECL_ONE_ONLY (node
->decl
))
357 || node
->resolution
== LDPR_UNKNOWN
)
360 define
= (node
->resolution
== LDPR_PREVAILING_DEF_IRONLY
361 || node
->resolution
== LDPR_PREVAILING_DEF
362 || node
->resolution
== LDPR_PREVAILING_DEF_IRONLY_EXP
);
364 /* The linker decisions ought to agree in the whole group. */
365 if (node
->same_comdat_group
)
366 for (symtab_node
*next
= node
->same_comdat_group
;
367 next
!= node
; next
= next
->same_comdat_group
)
368 gcc_assert (!node
->externally_visible
369 || define
== (next
->resolution
== LDPR_PREVAILING_DEF_IRONLY
370 || next
->resolution
== LDPR_PREVAILING_DEF
371 || next
->resolution
== LDPR_PREVAILING_DEF_IRONLY_EXP
));
373 if (node
->same_comdat_group
)
374 for (symtab_node
*next
= node
->same_comdat_group
;
375 next
!= node
; next
= next
->same_comdat_group
)
377 next
->set_comdat_group (NULL
);
378 DECL_WEAK (next
->decl
) = false;
379 if (next
->externally_visible
381 DECL_EXTERNAL (next
->decl
) = true;
383 node
->set_comdat_group (NULL
);
384 DECL_WEAK (node
->decl
) = false;
386 DECL_EXTERNAL (node
->decl
) = true;
387 symtab_dissolve_same_comdat_group_list (node
);
390 /* Decide on visibility of all symbols. */
393 function_and_variable_visibility (bool whole_program
)
395 struct cgraph_node
*node
;
398 /* All aliases should be procssed at this point. */
399 gcc_checking_assert (!alias_pairs
|| !alias_pairs
->length ());
401 FOR_EACH_FUNCTION (node
)
403 int flags
= flags_from_decl_or_type (node
->decl
);
405 /* Optimize away PURE and CONST constructors and destructors. */
407 && (flags
& (ECF_CONST
| ECF_PURE
))
408 && !(flags
& ECF_LOOPING_CONST_OR_PURE
))
410 DECL_STATIC_CONSTRUCTOR (node
->decl
) = 0;
411 DECL_STATIC_DESTRUCTOR (node
->decl
) = 0;
414 /* Frontends and alias code marks nodes as needed before parsing is finished.
415 We may end up marking as node external nodes where this flag is meaningless
417 if (DECL_EXTERNAL (node
->decl
) || !node
->definition
)
419 node
->force_output
= 0;
420 node
->forced_by_abi
= 0;
423 /* C++ FE on lack of COMDAT support create local COMDAT functions
424 (that ought to be shared but can not due to object format
425 limitations). It is necessary to keep the flag to make rest of C++ FE
426 happy. Clear the flag here to avoid confusion in middle-end. */
427 if (DECL_COMDAT (node
->decl
) && !TREE_PUBLIC (node
->decl
))
428 DECL_COMDAT (node
->decl
) = 0;
430 /* For external decls stop tracking same_comdat_group. It doesn't matter
431 what comdat group they are in when they won't be emitted in this TU. */
432 if (node
->same_comdat_group
&& DECL_EXTERNAL (node
->decl
))
434 #ifdef ENABLE_CHECKING
437 for (n
= node
->same_comdat_group
;
439 n
= n
->same_comdat_group
)
440 /* If at least one of same comdat group functions is external,
441 all of them have to be, otherwise it is a front-end bug. */
442 gcc_assert (DECL_EXTERNAL (n
->decl
));
444 symtab_dissolve_same_comdat_group_list (node
);
446 gcc_assert ((!DECL_WEAK (node
->decl
)
447 && !DECL_COMDAT (node
->decl
))
448 || TREE_PUBLIC (node
->decl
)
450 || DECL_EXTERNAL (node
->decl
));
451 if (cgraph_externally_visible_p (node
, whole_program
))
453 gcc_assert (!node
->global
.inlined_to
);
454 node
->externally_visible
= true;
458 node
->externally_visible
= false;
459 node
->forced_by_abi
= false;
461 if (!node
->externally_visible
462 && node
->definition
&& !node
->weakref
463 && !DECL_EXTERNAL (node
->decl
))
465 gcc_assert (whole_program
|| in_lto_p
466 || !TREE_PUBLIC (node
->decl
));
467 node
->unique_name
= ((node
->resolution
== LDPR_PREVAILING_DEF_IRONLY
469 || node
->resolution
== LDPR_PREVAILING_DEF_IRONLY_EXP
)
470 && TREE_PUBLIC (node
->decl
));
471 node
->resolution
= LDPR_PREVAILING_DEF_IRONLY
;
472 if (node
->same_comdat_group
&& TREE_PUBLIC (node
->decl
))
474 symtab_node
*next
= node
;
476 /* Set all members of comdat group local. */
477 if (node
->same_comdat_group
)
478 for (next
= node
->same_comdat_group
;
480 next
= next
->same_comdat_group
)
482 next
->set_comdat_group (NULL
);
483 symtab_make_decl_local (next
->decl
);
484 next
->unique_name
= ((next
->resolution
== LDPR_PREVAILING_DEF_IRONLY
486 || next
->resolution
== LDPR_PREVAILING_DEF_IRONLY_EXP
)
487 && TREE_PUBLIC (next
->decl
));
489 /* cgraph_externally_visible_p has already checked all other nodes
490 in the group and they will all be made local. We need to
491 dissolve the group at once so that the predicate does not
493 symtab_dissolve_same_comdat_group_list (node
);
495 if (TREE_PUBLIC (node
->decl
))
496 node
->set_comdat_group (NULL
);
497 symtab_make_decl_local (node
->decl
);
500 if (node
->thunk
.thunk_p
501 && TREE_PUBLIC (node
->decl
))
503 struct cgraph_node
*decl_node
= node
;
505 decl_node
= cgraph_function_node (decl_node
->callees
->callee
, NULL
);
507 /* Thunks have the same visibility as function they are attached to.
508 Make sure the C++ front end set this up properly. */
509 if (DECL_ONE_ONLY (decl_node
->decl
))
511 gcc_checking_assert (DECL_COMDAT (node
->decl
)
512 == DECL_COMDAT (decl_node
->decl
));
513 gcc_checking_assert (symtab_in_same_comdat_p (node
, decl_node
));
514 gcc_checking_assert (node
->same_comdat_group
);
516 node
->forced_by_abi
= decl_node
->forced_by_abi
;
517 if (DECL_EXTERNAL (decl_node
->decl
))
518 DECL_EXTERNAL (node
->decl
) = 1;
521 update_visibility_by_resolution_info (node
);
523 FOR_EACH_DEFINED_FUNCTION (node
)
525 node
->local
.local
|= cgraph_local_node_p (node
);
527 /* If we know that function can not be overwritten by a different semantics
528 and moreover its section can not be discarded, replace all direct calls
529 by calls to an nonoverwritable alias. This make dynamic linking
530 cheaper and enable more optimization.
532 TODO: We can also update virtual tables. */
533 if (node
->callers
&& can_replace_by_local_alias (node
))
535 struct cgraph_node
*alias
= cgraph (symtab_nonoverwritable_alias (node
));
537 if (alias
&& alias
!= node
)
539 while (node
->callers
)
541 struct cgraph_edge
*e
= node
->callers
;
543 cgraph_redirect_edge_callee (e
, alias
);
544 if (gimple_has_body_p (e
->caller
->decl
))
546 push_cfun (DECL_STRUCT_FUNCTION (e
->caller
->decl
));
547 cgraph_redirect_edge_call_stmt_to_callee (e
);
554 FOR_EACH_VARIABLE (vnode
)
556 /* weak flag makes no sense on local variables. */
557 gcc_assert (!DECL_WEAK (vnode
->decl
)
559 || TREE_PUBLIC (vnode
->decl
)
560 || DECL_EXTERNAL (vnode
->decl
));
561 /* In several cases declarations can not be common:
563 - when declaration has initializer
565 - when it has specific section
566 - when it resides in non-generic address space.
567 - if declaration is local, it will get into .local common section
568 so common flag is not needed. Frontends still produce these in
569 certain cases, such as for:
571 static int a __attribute__ ((common))
573 Canonicalize things here and clear the redundant flag. */
574 if (DECL_COMMON (vnode
->decl
)
575 && (!(TREE_PUBLIC (vnode
->decl
)
576 || DECL_EXTERNAL (vnode
->decl
))
577 || (DECL_INITIAL (vnode
->decl
)
578 && DECL_INITIAL (vnode
->decl
) != error_mark_node
)
579 || DECL_WEAK (vnode
->decl
)
580 || DECL_SECTION_NAME (vnode
->decl
) != NULL
581 || ! (ADDR_SPACE_GENERIC_P
582 (TYPE_ADDR_SPACE (TREE_TYPE (vnode
->decl
))))))
583 DECL_COMMON (vnode
->decl
) = 0;
585 FOR_EACH_DEFINED_VARIABLE (vnode
)
587 if (!vnode
->definition
)
589 if (varpool_externally_visible_p (vnode
))
590 vnode
->externally_visible
= true;
593 vnode
->externally_visible
= false;
594 vnode
->forced_by_abi
= false;
596 if (!vnode
->externally_visible
599 gcc_assert (in_lto_p
|| whole_program
|| !TREE_PUBLIC (vnode
->decl
));
600 vnode
->unique_name
= ((vnode
->resolution
== LDPR_PREVAILING_DEF_IRONLY
601 || vnode
->resolution
== LDPR_PREVAILING_DEF_IRONLY_EXP
)
602 && TREE_PUBLIC (vnode
->decl
));
603 if (vnode
->same_comdat_group
&& TREE_PUBLIC (vnode
->decl
))
605 symtab_node
*next
= vnode
;
607 /* Set all members of comdat group local. */
608 if (vnode
->same_comdat_group
)
609 for (next
= vnode
->same_comdat_group
;
611 next
= next
->same_comdat_group
)
613 next
->set_comdat_group (NULL
);
614 symtab_make_decl_local (next
->decl
);
615 next
->unique_name
= ((next
->resolution
== LDPR_PREVAILING_DEF_IRONLY
617 || next
->resolution
== LDPR_PREVAILING_DEF_IRONLY_EXP
)
618 && TREE_PUBLIC (next
->decl
));
620 symtab_dissolve_same_comdat_group_list (vnode
);
622 if (TREE_PUBLIC (vnode
->decl
))
623 vnode
->set_comdat_group (NULL
);
624 symtab_make_decl_local (vnode
->decl
);
625 vnode
->resolution
= LDPR_PREVAILING_DEF_IRONLY
;
627 update_visibility_by_resolution_info (vnode
);
632 fprintf (dump_file
, "\nMarking local functions:");
633 FOR_EACH_DEFINED_FUNCTION (node
)
634 if (node
->local
.local
)
635 fprintf (dump_file
, " %s", node
->name ());
636 fprintf (dump_file
, "\n\n");
637 fprintf (dump_file
, "\nMarking externally visible functions:");
638 FOR_EACH_DEFINED_FUNCTION (node
)
639 if (node
->externally_visible
)
640 fprintf (dump_file
, " %s", node
->name ());
641 fprintf (dump_file
, "\n\n");
642 fprintf (dump_file
, "\nMarking externally visible variables:");
643 FOR_EACH_DEFINED_VARIABLE (vnode
)
644 if (vnode
->externally_visible
)
645 fprintf (dump_file
, " %s", vnode
->name ());
646 fprintf (dump_file
, "\n\n");
648 cgraph_function_flags_ready
= true;
652 /* Local function pass handling visibilities. This happens before LTO streaming
653 so in particular -fwhole-program should be ignored at this level. */
657 const pass_data pass_data_ipa_function_and_variable_visibility
=
659 SIMPLE_IPA_PASS
, /* type */
660 "visibility", /* name */
661 OPTGROUP_NONE
, /* optinfo_flags */
662 true, /* has_execute */
663 TV_CGRAPHOPT
, /* tv_id */
664 0, /* properties_required */
665 0, /* properties_provided */
666 0, /* properties_destroyed */
667 0, /* todo_flags_start */
668 ( TODO_remove_functions
| TODO_dump_symtab
), /* todo_flags_finish */
671 /* Bring functions local at LTO time with -fwhole-program. */
674 whole_program_function_and_variable_visibility (void)
676 function_and_variable_visibility (flag_whole_program
);
678 ipa_discover_readonly_nonaddressable_vars ();
686 const pass_data pass_data_ipa_whole_program_visibility
=
689 "whole-program", /* name */
690 OPTGROUP_NONE
, /* optinfo_flags */
691 true, /* has_execute */
692 TV_CGRAPHOPT
, /* tv_id */
693 0, /* properties_required */
694 0, /* properties_provided */
695 0, /* properties_destroyed */
696 0, /* todo_flags_start */
697 ( TODO_remove_functions
| TODO_dump_symtab
), /* todo_flags_finish */
700 class pass_ipa_whole_program_visibility
: public ipa_opt_pass_d
703 pass_ipa_whole_program_visibility (gcc::context
*ctxt
)
704 : ipa_opt_pass_d (pass_data_ipa_whole_program_visibility
, ctxt
,
705 NULL
, /* generate_summary */
706 NULL
, /* write_summary */
707 NULL
, /* read_summary */
708 NULL
, /* write_optimization_summary */
709 NULL
, /* read_optimization_summary */
710 NULL
, /* stmt_fixup */
711 0, /* function_transform_todo_flags_start */
712 NULL
, /* function_transform */
713 NULL
) /* variable_transform */
716 /* opt_pass methods: */
718 virtual bool gate (function
*)
720 /* Do not re-run on ltrans stage. */
723 virtual unsigned int execute (function
*)
725 return whole_program_function_and_variable_visibility ();
728 }; // class pass_ipa_whole_program_visibility
733 make_pass_ipa_whole_program_visibility (gcc::context
*ctxt
)
735 return new pass_ipa_whole_program_visibility (ctxt
);
738 class pass_ipa_function_and_variable_visibility
: public simple_ipa_opt_pass
741 pass_ipa_function_and_variable_visibility (gcc::context
*ctxt
)
742 : simple_ipa_opt_pass (pass_data_ipa_function_and_variable_visibility
,
746 /* opt_pass methods: */
747 virtual unsigned int execute (function
*)
749 return function_and_variable_visibility (flag_whole_program
&& !flag_lto
);
752 }; // class pass_ipa_function_and_variable_visibility
754 simple_ipa_opt_pass
*
755 make_pass_ipa_function_and_variable_visibility (gcc::context
*ctxt
)
757 return new pass_ipa_function_and_variable_visibility (ctxt
);