1 /* Callgraph handling code.
2 Copyright (C) 2003-2015 Free Software Foundation, Inc.
3 Contributed by Jan Hubicka
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 3, 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 COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
21 /* This file contains basic routines manipulating call graph
23 The call-graph is a data structure designed for intra-procedural optimization.
24 It represents a multi-graph where nodes are functions and edges are call sites. */
28 #include "coretypes.h"
33 #include "double-int.h"
40 #include "fold-const.h"
43 #include "print-tree.h"
44 #include "tree-inline.h"
45 #include "langhooks.h"
52 #include "dominance.h"
54 #include "basic-block.h"
57 #include "plugin-api.h"
58 #include "hard-reg-set.h"
63 #include "tree-ssa-alias.h"
64 #include "internal-fn.h"
66 #include "gimple-expr.h"
68 #include "gimple-iterator.h"
71 #include "gimple-ssa.h"
74 #include "value-prof.h"
76 #include "diagnostic-core.h"
78 #include "ipa-utils.h"
79 #include "lto-streamer.h"
80 #include "alloc-pool.h"
81 #include "symbol-summary.h"
83 #include "ipa-inline.h"
85 #include "gimple-pretty-print.h"
86 #include "statistics.h"
88 #include "fixed-value.h"
89 #include "insn-config.h"
99 #include "tree-chkp.h"
102 /* FIXME: Only for PROP_loops, but cgraph shouldn't have to know about this. */
103 #include "tree-pass.h"
105 /* Queue of cgraph nodes scheduled to be lowered. */
106 symtab_node
*x_cgraph_nodes_queue
;
107 #define cgraph_nodes_queue ((cgraph_node *)x_cgraph_nodes_queue)
109 /* Symbol table global context. */
110 symbol_table
*symtab
;
112 /* List of hooks triggered on cgraph_edge events. */
113 struct cgraph_edge_hook_list
{
114 cgraph_edge_hook hook
;
116 struct cgraph_edge_hook_list
*next
;
119 /* List of hooks triggered on cgraph_node events. */
120 struct cgraph_node_hook_list
{
121 cgraph_node_hook hook
;
123 struct cgraph_node_hook_list
*next
;
126 /* List of hooks triggered on events involving two cgraph_edges. */
127 struct cgraph_2edge_hook_list
{
128 cgraph_2edge_hook hook
;
130 struct cgraph_2edge_hook_list
*next
;
133 /* List of hooks triggered on events involving two cgraph_nodes. */
134 struct cgraph_2node_hook_list
{
135 cgraph_2node_hook hook
;
137 struct cgraph_2node_hook_list
*next
;
140 /* Hash descriptor for cgraph_function_version_info. */
142 struct function_version_hasher
: ggc_hasher
<cgraph_function_version_info
*>
144 static hashval_t
hash (cgraph_function_version_info
*);
145 static bool equal (cgraph_function_version_info
*,
146 cgraph_function_version_info
*);
149 /* Map a cgraph_node to cgraph_function_version_info using this htab.
150 The cgraph_function_version_info has a THIS_NODE field that is the
151 corresponding cgraph_node.. */
153 static GTY(()) hash_table
<function_version_hasher
> *cgraph_fnver_htab
= NULL
;
155 /* Hash function for cgraph_fnver_htab. */
157 function_version_hasher::hash (cgraph_function_version_info
*ptr
)
159 int uid
= ptr
->this_node
->uid
;
160 return (hashval_t
)(uid
);
163 /* eq function for cgraph_fnver_htab. */
165 function_version_hasher::equal (cgraph_function_version_info
*n1
,
166 cgraph_function_version_info
*n2
)
168 return n1
->this_node
->uid
== n2
->this_node
->uid
;
171 /* Mark as GC root all allocated nodes. */
172 static GTY(()) struct cgraph_function_version_info
*
173 version_info_node
= NULL
;
175 /* Get the cgraph_function_version_info node corresponding to node. */
176 cgraph_function_version_info
*
177 cgraph_node::function_version (void)
179 cgraph_function_version_info key
;
180 key
.this_node
= this;
182 if (cgraph_fnver_htab
== NULL
)
185 return cgraph_fnver_htab
->find (&key
);
188 /* Insert a new cgraph_function_version_info node into cgraph_fnver_htab
189 corresponding to cgraph_node NODE. */
190 cgraph_function_version_info
*
191 cgraph_node::insert_new_function_version (void)
193 version_info_node
= NULL
;
194 version_info_node
= ggc_cleared_alloc
<cgraph_function_version_info
> ();
195 version_info_node
->this_node
= this;
197 if (cgraph_fnver_htab
== NULL
)
198 cgraph_fnver_htab
= hash_table
<function_version_hasher
>::create_ggc (2);
200 *cgraph_fnver_htab
->find_slot (version_info_node
, INSERT
)
202 return version_info_node
;
205 /* Remove the cgraph_function_version_info and cgraph_node for DECL. This
206 DECL is a duplicate declaration. */
208 cgraph_node::delete_function_version (tree decl
)
210 cgraph_node
*decl_node
= cgraph_node::get (decl
);
211 cgraph_function_version_info
*decl_v
= NULL
;
213 if (decl_node
== NULL
)
216 decl_v
= decl_node
->function_version ();
221 if (decl_v
->prev
!= NULL
)
222 decl_v
->prev
->next
= decl_v
->next
;
224 if (decl_v
->next
!= NULL
)
225 decl_v
->next
->prev
= decl_v
->prev
;
227 if (cgraph_fnver_htab
!= NULL
)
228 cgraph_fnver_htab
->remove_elt (decl_v
);
230 decl_node
->remove ();
233 /* Record that DECL1 and DECL2 are semantically identical function
236 cgraph_node::record_function_versions (tree decl1
, tree decl2
)
238 cgraph_node
*decl1_node
= cgraph_node::get_create (decl1
);
239 cgraph_node
*decl2_node
= cgraph_node::get_create (decl2
);
240 cgraph_function_version_info
*decl1_v
= NULL
;
241 cgraph_function_version_info
*decl2_v
= NULL
;
242 cgraph_function_version_info
*before
;
243 cgraph_function_version_info
*after
;
245 gcc_assert (decl1_node
!= NULL
&& decl2_node
!= NULL
);
246 decl1_v
= decl1_node
->function_version ();
247 decl2_v
= decl2_node
->function_version ();
249 if (decl1_v
!= NULL
&& decl2_v
!= NULL
)
253 decl1_v
= decl1_node
->insert_new_function_version ();
256 decl2_v
= decl2_node
->insert_new_function_version ();
258 /* Chain decl2_v and decl1_v. All semantically identical versions
259 will be chained together. */
264 while (before
->next
!= NULL
)
265 before
= before
->next
;
267 while (after
->prev
!= NULL
)
270 before
->next
= after
;
271 after
->prev
= before
;
274 /* Initialize callgraph dump file. */
277 symbol_table::initialize (void)
280 dump_file
= dump_begin (TDI_cgraph
, NULL
);
283 /* Allocate new callgraph node and insert it into basic data structures. */
286 symbol_table::create_empty (void)
288 cgraph_node
*node
= allocate_cgraph_symbol ();
290 node
->type
= SYMTAB_FUNCTION
;
291 node
->frequency
= NODE_FREQUENCY_NORMAL
;
292 node
->count_materialization_scale
= REG_BR_PROB_BASE
;
298 /* Register HOOK to be called with DATA on each removed edge. */
299 cgraph_edge_hook_list
*
300 symbol_table::add_edge_removal_hook (cgraph_edge_hook hook
, void *data
)
302 cgraph_edge_hook_list
*entry
;
303 cgraph_edge_hook_list
**ptr
= &m_first_edge_removal_hook
;
305 entry
= (cgraph_edge_hook_list
*) xmalloc (sizeof (*entry
));
315 /* Remove ENTRY from the list of hooks called on removing edges. */
317 symbol_table::remove_edge_removal_hook (cgraph_edge_hook_list
*entry
)
319 cgraph_edge_hook_list
**ptr
= &m_first_edge_removal_hook
;
321 while (*ptr
!= entry
)
327 /* Call all edge removal hooks. */
329 symbol_table::call_edge_removal_hooks (cgraph_edge
*e
)
331 cgraph_edge_hook_list
*entry
= m_first_edge_removal_hook
;
334 entry
->hook (e
, entry
->data
);
339 /* Register HOOK to be called with DATA on each removed node. */
340 cgraph_node_hook_list
*
341 symbol_table::add_cgraph_removal_hook (cgraph_node_hook hook
, void *data
)
343 cgraph_node_hook_list
*entry
;
344 cgraph_node_hook_list
**ptr
= &m_first_cgraph_removal_hook
;
346 entry
= (cgraph_node_hook_list
*) xmalloc (sizeof (*entry
));
356 /* Remove ENTRY from the list of hooks called on removing nodes. */
358 symbol_table::remove_cgraph_removal_hook (cgraph_node_hook_list
*entry
)
360 cgraph_node_hook_list
**ptr
= &m_first_cgraph_removal_hook
;
362 while (*ptr
!= entry
)
368 /* Call all node removal hooks. */
370 symbol_table::call_cgraph_removal_hooks (cgraph_node
*node
)
372 cgraph_node_hook_list
*entry
= m_first_cgraph_removal_hook
;
375 entry
->hook (node
, entry
->data
);
380 /* Call all node removal hooks. */
382 symbol_table::call_cgraph_insertion_hooks (cgraph_node
*node
)
384 cgraph_node_hook_list
*entry
= m_first_cgraph_insertion_hook
;
387 entry
->hook (node
, entry
->data
);
393 /* Register HOOK to be called with DATA on each inserted node. */
394 cgraph_node_hook_list
*
395 symbol_table::add_cgraph_insertion_hook (cgraph_node_hook hook
, void *data
)
397 cgraph_node_hook_list
*entry
;
398 cgraph_node_hook_list
**ptr
= &m_first_cgraph_insertion_hook
;
400 entry
= (cgraph_node_hook_list
*) xmalloc (sizeof (*entry
));
410 /* Remove ENTRY from the list of hooks called on inserted nodes. */
412 symbol_table::remove_cgraph_insertion_hook (cgraph_node_hook_list
*entry
)
414 cgraph_node_hook_list
**ptr
= &m_first_cgraph_insertion_hook
;
416 while (*ptr
!= entry
)
422 /* Register HOOK to be called with DATA on each duplicated edge. */
423 cgraph_2edge_hook_list
*
424 symbol_table::add_edge_duplication_hook (cgraph_2edge_hook hook
, void *data
)
426 cgraph_2edge_hook_list
*entry
;
427 cgraph_2edge_hook_list
**ptr
= &m_first_edge_duplicated_hook
;
429 entry
= (cgraph_2edge_hook_list
*) xmalloc (sizeof (*entry
));
439 /* Remove ENTRY from the list of hooks called on duplicating edges. */
441 symbol_table::remove_edge_duplication_hook (cgraph_2edge_hook_list
*entry
)
443 cgraph_2edge_hook_list
**ptr
= &m_first_edge_duplicated_hook
;
445 while (*ptr
!= entry
)
451 /* Call all edge duplication hooks. */
453 symbol_table::call_edge_duplication_hooks (cgraph_edge
*cs1
, cgraph_edge
*cs2
)
455 cgraph_2edge_hook_list
*entry
= m_first_edge_duplicated_hook
;
458 entry
->hook (cs1
, cs2
, entry
->data
);
463 /* Register HOOK to be called with DATA on each duplicated node. */
464 cgraph_2node_hook_list
*
465 symbol_table::add_cgraph_duplication_hook (cgraph_2node_hook hook
, void *data
)
467 cgraph_2node_hook_list
*entry
;
468 cgraph_2node_hook_list
**ptr
= &m_first_cgraph_duplicated_hook
;
470 entry
= (cgraph_2node_hook_list
*) xmalloc (sizeof (*entry
));
480 /* Remove ENTRY from the list of hooks called on duplicating nodes. */
482 symbol_table::remove_cgraph_duplication_hook (cgraph_2node_hook_list
*entry
)
484 cgraph_2node_hook_list
**ptr
= &m_first_cgraph_duplicated_hook
;
486 while (*ptr
!= entry
)
492 /* Call all node duplication hooks. */
494 symbol_table::call_cgraph_duplication_hooks (cgraph_node
*node
,
497 cgraph_2node_hook_list
*entry
= m_first_cgraph_duplicated_hook
;
500 entry
->hook (node
, node2
, entry
->data
);
505 /* Return cgraph node assigned to DECL. Create new one when needed. */
508 cgraph_node::create (tree decl
)
510 cgraph_node
*node
= symtab
->create_empty ();
511 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
);
515 if ((flag_openacc
|| flag_openmp
)
516 && lookup_attribute ("omp declare target", DECL_ATTRIBUTES (decl
)))
518 node
->offloadable
= 1;
519 #ifdef ENABLE_OFFLOADING
520 g
->have_offload
= true;
524 node
->register_symbol ();
526 if (DECL_CONTEXT (decl
) && TREE_CODE (DECL_CONTEXT (decl
)) == FUNCTION_DECL
)
528 node
->origin
= cgraph_node::get_create (DECL_CONTEXT (decl
));
529 node
->next_nested
= node
->origin
->nested
;
530 node
->origin
->nested
= node
;
535 /* Try to find a call graph node for declaration DECL and if it does not exist
536 or if it corresponds to an inline clone, create a new one. */
539 cgraph_node::get_create (tree decl
)
541 cgraph_node
*first_clone
= cgraph_node::get (decl
);
543 if (first_clone
&& !first_clone
->global
.inlined_to
)
546 cgraph_node
*node
= cgraph_node::create (decl
);
549 first_clone
->clone_of
= node
;
550 node
->clones
= first_clone
;
551 symtab
->symtab_prevail_in_asm_name_hash (node
);
552 node
->decl
->decl_with_vis
.symtab_node
= node
;
554 fprintf (dump_file
, "Introduced new external node "
555 "(%s/%i) and turned into root of the clone tree.\n",
556 node
->name (), node
->order
);
559 fprintf (dump_file
, "Introduced new external node "
560 "(%s/%i).\n", node
->name (), node
->order
);
564 /* Mark ALIAS as an alias to DECL. DECL_NODE is cgraph node representing
565 the function body is associated with (not necessarily cgraph_node (DECL). */
568 cgraph_node::create_alias (tree alias
, tree target
)
570 cgraph_node
*alias_node
;
572 gcc_assert (TREE_CODE (target
) == FUNCTION_DECL
573 || TREE_CODE (target
) == IDENTIFIER_NODE
);
574 gcc_assert (TREE_CODE (alias
) == FUNCTION_DECL
);
575 alias_node
= cgraph_node::get_create (alias
);
576 gcc_assert (!alias_node
->definition
);
577 alias_node
->alias_target
= target
;
578 alias_node
->definition
= true;
579 alias_node
->alias
= true;
580 if (lookup_attribute ("weakref", DECL_ATTRIBUTES (alias
)) != NULL
)
581 alias_node
->weakref
= true;
585 /* Attempt to mark ALIAS as an alias to DECL. Return alias node if successful
587 Same body aliases are output whenever the body of DECL is output,
588 and cgraph_node::get (ALIAS) transparently returns
589 cgraph_node::get (DECL). */
592 cgraph_node::create_same_body_alias (tree alias
, tree decl
)
595 #ifndef ASM_OUTPUT_DEF
596 /* If aliases aren't supported by the assembler, fail. */
599 /* Langhooks can create same body aliases of symbols not defined.
600 Those are useless. Drop them on the floor. */
601 if (symtab
->global_info_ready
)
604 n
= cgraph_node::create_alias (alias
, decl
);
605 n
->cpp_implicit_alias
= true;
606 if (symtab
->cpp_implicit_aliases_done
)
607 n
->resolve_alias (cgraph_node::get (decl
));
611 /* Add thunk alias into callgraph. The alias declaration is ALIAS and it
612 aliases DECL with an adjustments made into the first parameter.
613 See comments in thunk_adjust for detail on the parameters. */
616 cgraph_node::create_thunk (tree alias
, tree
, bool this_adjusting
,
617 HOST_WIDE_INT fixed_offset
,
618 HOST_WIDE_INT virtual_value
,
624 node
= cgraph_node::get (alias
);
628 node
= cgraph_node::create (alias
);
629 gcc_checking_assert (!virtual_offset
630 || wi::eq_p (virtual_offset
, virtual_value
));
631 node
->thunk
.fixed_offset
= fixed_offset
;
632 node
->thunk
.this_adjusting
= this_adjusting
;
633 node
->thunk
.virtual_value
= virtual_value
;
634 node
->thunk
.virtual_offset_p
= virtual_offset
!= NULL
;
635 node
->thunk
.alias
= real_alias
;
636 node
->thunk
.thunk_p
= true;
637 node
->definition
= true;
642 /* Return the cgraph node that has ASMNAME for its DECL_ASSEMBLER_NAME.
643 Return NULL if there's no such node. */
646 cgraph_node::get_for_asmname (tree asmname
)
648 /* We do not want to look at inline clones. */
649 for (symtab_node
*node
= symtab_node::get_for_asmname (asmname
);
651 node
= node
->next_sharing_asm_name
)
653 cgraph_node
*cn
= dyn_cast
<cgraph_node
*> (node
);
654 if (cn
&& !cn
->global
.inlined_to
)
660 /* Returns a hash value for X (which really is a cgraph_edge). */
663 cgraph_edge_hasher::hash (cgraph_edge
*e
)
665 /* This is a really poor hash function, but it is what htab_hash_pointer
667 return (hashval_t
) ((intptr_t)e
->call_stmt
>> 3);
670 /* Returns a hash value for X (which really is a cgraph_edge). */
673 cgraph_edge_hasher::hash (gimple call_stmt
)
675 /* This is a really poor hash function, but it is what htab_hash_pointer
677 return (hashval_t
) ((intptr_t)call_stmt
>> 3);
680 /* Return nonzero if the call_stmt of of cgraph_edge X is stmt *Y. */
683 cgraph_edge_hasher::equal (cgraph_edge
*x
, gimple y
)
685 return x
->call_stmt
== y
;
688 /* Add call graph edge E to call site hash of its caller. */
691 cgraph_update_edge_in_call_site_hash (cgraph_edge
*e
)
693 gimple call
= e
->call_stmt
;
694 *e
->caller
->call_site_hash
->find_slot_with_hash
695 (call
, cgraph_edge_hasher::hash (call
), INSERT
) = e
;
698 /* Add call graph edge E to call site hash of its caller. */
701 cgraph_add_edge_to_call_site_hash (cgraph_edge
*e
)
703 /* There are two speculative edges for every statement (one direct,
704 one indirect); always hash the direct one. */
705 if (e
->speculative
&& e
->indirect_unknown_callee
)
707 cgraph_edge
**slot
= e
->caller
->call_site_hash
->find_slot_with_hash
708 (e
->call_stmt
, cgraph_edge_hasher::hash (e
->call_stmt
), INSERT
);
711 gcc_assert (((cgraph_edge
*)*slot
)->speculative
);
716 gcc_assert (!*slot
|| e
->speculative
);
720 /* Return the callgraph edge representing the GIMPLE_CALL statement
724 cgraph_node::get_edge (gimple call_stmt
)
730 return call_site_hash
->find_with_hash
731 (call_stmt
, cgraph_edge_hasher::hash (call_stmt
));
733 /* This loop may turn out to be performance problem. In such case adding
734 hashtables into call nodes with very many edges is probably best
735 solution. It is not good idea to add pointer into CALL_EXPR itself
736 because we want to make possible having multiple cgraph nodes representing
737 different clones of the same body before the body is actually cloned. */
738 for (e
= callees
; e
; e
= e
->next_callee
)
740 if (e
->call_stmt
== call_stmt
)
746 for (e
= indirect_calls
; e
; e
= e
->next_callee
)
748 if (e
->call_stmt
== call_stmt
)
755 call_site_hash
= hash_table
<cgraph_edge_hasher
>::create_ggc (120);
756 for (e2
= callees
; e2
; e2
= e2
->next_callee
)
757 cgraph_add_edge_to_call_site_hash (e2
);
758 for (e2
= indirect_calls
; e2
; e2
= e2
->next_callee
)
759 cgraph_add_edge_to_call_site_hash (e2
);
766 /* Change field call_stmt of edge to NEW_STMT.
767 If UPDATE_SPECULATIVE and E is any component of speculative
768 edge, then update all components. */
771 cgraph_edge::set_call_stmt (gcall
*new_stmt
, bool update_speculative
)
775 /* Speculative edges has three component, update all of them
777 if (update_speculative
&& speculative
)
779 cgraph_edge
*direct
, *indirect
;
782 speculative_call_info (direct
, indirect
, ref
);
783 direct
->set_call_stmt (new_stmt
, false);
784 indirect
->set_call_stmt (new_stmt
, false);
785 ref
->stmt
= new_stmt
;
789 /* Only direct speculative edges go to call_site_hash. */
790 if (caller
->call_site_hash
791 && (!speculative
|| !indirect_unknown_callee
))
793 caller
->call_site_hash
->remove_elt_with_hash
794 (call_stmt
, cgraph_edge_hasher::hash (call_stmt
));
797 cgraph_edge
*e
= this;
799 call_stmt
= new_stmt
;
800 if (indirect_unknown_callee
801 && (decl
= gimple_call_fndecl (new_stmt
)))
803 /* Constant propagation (and possibly also inlining?) can turn an
804 indirect call into a direct one. */
805 cgraph_node
*new_callee
= cgraph_node::get (decl
);
807 gcc_checking_assert (new_callee
);
808 e
= make_direct (new_callee
);
811 push_cfun (DECL_STRUCT_FUNCTION (e
->caller
->decl
));
812 e
->can_throw_external
= stmt_can_throw_external (new_stmt
);
814 if (e
->caller
->call_site_hash
)
815 cgraph_add_edge_to_call_site_hash (e
);
818 /* Allocate a cgraph_edge structure and fill it with data according to the
819 parameters of which only CALLEE can be NULL (when creating an indirect call
823 symbol_table::create_edge (cgraph_node
*caller
, cgraph_node
*callee
,
824 gcall
*call_stmt
, gcov_type count
, int freq
,
825 bool indir_unknown_callee
)
829 /* LTO does not actually have access to the call_stmt since these
830 have not been loaded yet. */
833 /* This is a rather expensive check possibly triggering
834 construction of call stmt hashtable. */
835 #ifdef ENABLE_CHECKING
837 gcc_checking_assert (
838 !(e
= caller
->get_edge (call_stmt
)) || e
->speculative
);
841 gcc_assert (is_gimple_call (call_stmt
));
847 free_edges
= NEXT_FREE_EDGE (edge
);
851 edge
= ggc_alloc
<cgraph_edge
> ();
852 edge
->uid
= edges_max_uid
++;
858 edge
->caller
= caller
;
859 edge
->callee
= callee
;
860 edge
->prev_caller
= NULL
;
861 edge
->next_caller
= NULL
;
862 edge
->prev_callee
= NULL
;
863 edge
->next_callee
= NULL
;
864 edge
->lto_stmt_uid
= 0;
867 gcc_assert (count
>= 0);
868 edge
->frequency
= freq
;
869 gcc_assert (freq
>= 0);
870 gcc_assert (freq
<= CGRAPH_FREQ_MAX
);
872 edge
->call_stmt
= call_stmt
;
873 push_cfun (DECL_STRUCT_FUNCTION (caller
->decl
));
874 edge
->can_throw_external
875 = call_stmt
? stmt_can_throw_external (call_stmt
) : false;
878 && callee
&& callee
->decl
879 && !gimple_check_call_matching_types (call_stmt
, callee
->decl
,
881 edge
->call_stmt_cannot_inline_p
= true;
883 edge
->call_stmt_cannot_inline_p
= false;
885 edge
->indirect_info
= NULL
;
886 edge
->indirect_inlining_edge
= 0;
887 edge
->speculative
= false;
888 edge
->indirect_unknown_callee
= indir_unknown_callee
;
889 if (opt_for_fn (edge
->caller
->decl
, flag_devirtualize
)
890 && call_stmt
&& DECL_STRUCT_FUNCTION (caller
->decl
))
891 edge
->in_polymorphic_cdtor
892 = decl_maybe_in_construction_p (NULL
, NULL
, call_stmt
,
895 edge
->in_polymorphic_cdtor
= caller
->thunk
.thunk_p
;
896 if (call_stmt
&& caller
->call_site_hash
)
897 cgraph_add_edge_to_call_site_hash (edge
);
902 /* Create edge from a given function to CALLEE in the cgraph. */
905 cgraph_node::create_edge (cgraph_node
*callee
,
906 gcall
*call_stmt
, gcov_type count
, int freq
)
908 cgraph_edge
*edge
= symtab
->create_edge (this, callee
, call_stmt
, count
,
911 initialize_inline_failed (edge
);
913 edge
->next_caller
= callee
->callers
;
915 callee
->callers
->prev_caller
= edge
;
916 edge
->next_callee
= callees
;
918 callees
->prev_callee
= edge
;
920 callee
->callers
= edge
;
925 /* Allocate cgraph_indirect_call_info and set its fields to default values. */
927 cgraph_indirect_call_info
*
928 cgraph_allocate_init_indirect_info (void)
930 cgraph_indirect_call_info
*ii
;
932 ii
= ggc_cleared_alloc
<cgraph_indirect_call_info
> ();
933 ii
->param_index
= -1;
937 /* Create an indirect edge with a yet-undetermined callee where the call
938 statement destination is a formal parameter of the caller with index
942 cgraph_node::create_indirect_edge (gcall
*call_stmt
, int ecf_flags
,
943 gcov_type count
, int freq
,
944 bool compute_indirect_info
)
946 cgraph_edge
*edge
= symtab
->create_edge (this, NULL
, call_stmt
,
950 initialize_inline_failed (edge
);
952 edge
->indirect_info
= cgraph_allocate_init_indirect_info ();
953 edge
->indirect_info
->ecf_flags
= ecf_flags
;
954 edge
->indirect_info
->vptr_changed
= true;
956 /* Record polymorphic call info. */
957 if (compute_indirect_info
959 && (target
= gimple_call_fn (call_stmt
))
960 && virtual_method_call_p (target
))
962 ipa_polymorphic_call_context
context (decl
, target
, call_stmt
);
964 /* Only record types can have virtual calls. */
965 edge
->indirect_info
->polymorphic
= true;
966 edge
->indirect_info
->param_index
= -1;
967 edge
->indirect_info
->otr_token
968 = tree_to_uhwi (OBJ_TYPE_REF_TOKEN (target
));
969 edge
->indirect_info
->otr_type
= obj_type_ref_class (target
);
970 gcc_assert (TREE_CODE (edge
->indirect_info
->otr_type
) == RECORD_TYPE
);
971 edge
->indirect_info
->context
= context
;
974 edge
->next_callee
= indirect_calls
;
976 indirect_calls
->prev_callee
= edge
;
977 indirect_calls
= edge
;
982 /* Remove the edge from the list of the callees of the caller. */
985 cgraph_edge::remove_caller (void)
988 prev_callee
->next_callee
= next_callee
;
990 next_callee
->prev_callee
= prev_callee
;
993 if (indirect_unknown_callee
)
994 caller
->indirect_calls
= next_callee
;
996 caller
->callees
= next_callee
;
998 if (caller
->call_site_hash
)
999 caller
->call_site_hash
->remove_elt_with_hash
1000 (call_stmt
, cgraph_edge_hasher::hash (call_stmt
));
1003 /* Put the edge onto the free list. */
1006 symbol_table::free_edge (cgraph_edge
*e
)
1010 if (e
->indirect_info
)
1011 ggc_free (e
->indirect_info
);
1013 /* Clear out the edge so we do not dangle pointers. */
1014 memset (e
, 0, sizeof (*e
));
1016 NEXT_FREE_EDGE (e
) = free_edges
;
1021 /* Remove the edge in the cgraph. */
1024 cgraph_edge::remove (void)
1026 /* Call all edge removal hooks. */
1027 symtab
->call_edge_removal_hooks (this);
1029 if (!indirect_unknown_callee
)
1030 /* Remove from callers list of the callee. */
1033 /* Remove from callees list of the callers. */
1036 /* Put the edge onto the free list. */
1037 symtab
->free_edge (this);
1040 /* Turn edge into speculative call calling N2. Update
1041 the profile so the direct call is taken COUNT times
1044 At clone materialization time, the indirect call E will
1047 if (call_dest == N2)
1052 At this time the function just creates the direct call,
1053 the referencd representing the if conditional and attaches
1054 them all to the orginal indirect call statement.
1056 Return direct edge created. */
1059 cgraph_edge::make_speculative (cgraph_node
*n2
, gcov_type direct_count
,
1060 int direct_frequency
)
1062 cgraph_node
*n
= caller
;
1063 ipa_ref
*ref
= NULL
;
1068 fprintf (dump_file
, "Indirect call -> speculative call"
1069 " %s/%i => %s/%i\n",
1070 xstrdup_for_dump (n
->name ()), n
->order
,
1071 xstrdup_for_dump (n2
->name ()), n2
->order
);
1074 e2
= n
->create_edge (n2
, call_stmt
, direct_count
, direct_frequency
);
1075 initialize_inline_failed (e2
);
1076 e2
->speculative
= true;
1077 if (TREE_NOTHROW (n2
->decl
))
1078 e2
->can_throw_external
= false;
1080 e2
->can_throw_external
= can_throw_external
;
1081 e2
->lto_stmt_uid
= lto_stmt_uid
;
1082 e2
->in_polymorphic_cdtor
= in_polymorphic_cdtor
;
1084 frequency
-= e2
->frequency
;
1085 symtab
->call_edge_duplication_hooks (this, e2
);
1086 ref
= n
->create_reference (n2
, IPA_REF_ADDR
, call_stmt
);
1087 ref
->lto_stmt_uid
= lto_stmt_uid
;
1088 ref
->speculative
= speculative
;
1089 n2
->mark_address_taken ();
1093 /* Speculative call consist of three components:
1094 1) an indirect edge representing the original call
1095 2) an direct edge representing the new call
1096 3) ADDR_EXPR reference representing the speculative check.
1097 All three components are attached to single statement (the indirect
1098 call) and if one of them exists, all of them must exist.
1100 Given speculative call edge, return all three components.
1104 cgraph_edge::speculative_call_info (cgraph_edge
*&direct
,
1105 cgraph_edge
*&indirect
,
1106 ipa_ref
*&reference
)
1111 cgraph_edge
*e
= this;
1113 if (!e
->indirect_unknown_callee
)
1114 for (e2
= e
->caller
->indirect_calls
;
1115 e2
->call_stmt
!= e
->call_stmt
|| e2
->lto_stmt_uid
!= e
->lto_stmt_uid
;
1116 e2
= e2
->next_callee
)
1121 /* We can take advantage of the call stmt hash. */
1124 e
= e
->caller
->get_edge (e2
->call_stmt
);
1125 gcc_assert (e
->speculative
&& !e
->indirect_unknown_callee
);
1128 for (e
= e
->caller
->callees
;
1129 e2
->call_stmt
!= e
->call_stmt
1130 || e2
->lto_stmt_uid
!= e
->lto_stmt_uid
;
1134 gcc_assert (e
->speculative
&& e2
->speculative
);
1139 for (i
= 0; e
->caller
->iterate_reference (i
, ref
); i
++)
1140 if (ref
->speculative
1141 && ((ref
->stmt
&& ref
->stmt
== e
->call_stmt
)
1142 || (!ref
->stmt
&& ref
->lto_stmt_uid
== e
->lto_stmt_uid
)))
1148 /* Speculative edge always consist of all three components - direct edge,
1149 indirect and reference. */
1151 gcc_assert (e
&& e2
&& ref
);
1154 /* Speculative call edge turned out to be direct call to CALLE_DECL.
1155 Remove the speculative call sequence and return edge representing the call.
1156 It is up to caller to redirect the call as appropriate. */
1159 cgraph_edge::resolve_speculation (tree callee_decl
)
1161 cgraph_edge
*edge
= this;
1165 gcc_assert (edge
->speculative
);
1166 edge
->speculative_call_info (e2
, edge
, ref
);
1168 || !ref
->referred
->semantically_equivalent_p
1169 (symtab_node::get (callee_decl
)))
1175 fprintf (dump_file
, "Speculative indirect call %s/%i => %s/%i has "
1176 "turned out to have contradicting known target ",
1177 xstrdup_for_dump (edge
->caller
->name ()),
1178 edge
->caller
->order
,
1179 xstrdup_for_dump (e2
->callee
->name ()),
1181 print_generic_expr (dump_file
, callee_decl
, 0);
1182 fprintf (dump_file
, "\n");
1186 fprintf (dump_file
, "Removing speculative call %s/%i => %s/%i\n",
1187 xstrdup_for_dump (edge
->caller
->name ()),
1188 edge
->caller
->order
,
1189 xstrdup_for_dump (e2
->callee
->name ()),
1196 cgraph_edge
*tmp
= edge
;
1198 fprintf (dump_file
, "Speculative call turned into direct call.\n");
1201 /* FIXME: If EDGE is inlined, we should scale up the frequencies and counts
1202 in the functions inlined through it. */
1204 edge
->count
+= e2
->count
;
1205 edge
->frequency
+= e2
->frequency
;
1206 if (edge
->frequency
> CGRAPH_FREQ_MAX
)
1207 edge
->frequency
= CGRAPH_FREQ_MAX
;
1208 edge
->speculative
= false;
1209 e2
->speculative
= false;
1210 ref
->remove_reference ();
1211 if (e2
->indirect_unknown_callee
|| e2
->inline_failed
)
1214 e2
->callee
->remove_symbol_and_inline_clones ();
1215 if (edge
->caller
->call_site_hash
)
1216 cgraph_update_edge_in_call_site_hash (edge
);
1220 /* Make an indirect edge with an unknown callee an ordinary edge leading to
1221 CALLEE. DELTA is an integer constant that is to be added to the this
1222 pointer (first parameter) to compensate for skipping a thunk adjustment. */
1225 cgraph_edge::make_direct (cgraph_node
*callee
)
1227 cgraph_edge
*edge
= this;
1228 gcc_assert (indirect_unknown_callee
);
1230 /* If we are redirecting speculative call, make it non-speculative. */
1231 if (indirect_unknown_callee
&& speculative
)
1233 edge
= edge
->resolve_speculation (callee
->decl
);
1235 /* On successful speculation just return the pre existing direct edge. */
1236 if (!indirect_unknown_callee
)
1240 indirect_unknown_callee
= 0;
1241 ggc_free (indirect_info
);
1242 indirect_info
= NULL
;
1244 /* Get the edge out of the indirect edge list. */
1246 prev_callee
->next_callee
= next_callee
;
1248 next_callee
->prev_callee
= prev_callee
;
1250 caller
->indirect_calls
= next_callee
;
1252 /* Put it into the normal callee list */
1254 next_callee
= caller
->callees
;
1255 if (caller
->callees
)
1256 caller
->callees
->prev_callee
= edge
;
1257 caller
->callees
= edge
;
1259 /* Insert to callers list of the new callee. */
1260 edge
->set_callee (callee
);
1263 call_stmt_cannot_inline_p
1264 = !gimple_check_call_matching_types (call_stmt
, callee
->decl
,
1267 /* We need to re-determine the inlining status of the edge. */
1268 initialize_inline_failed (edge
);
1272 /* If necessary, change the function declaration in the call statement
1273 associated with E so that it corresponds to the edge callee. */
1276 cgraph_edge::redirect_call_stmt_to_callee (void)
1278 cgraph_edge
*e
= this;
1280 tree decl
= gimple_call_fndecl (e
->call_stmt
);
1281 tree lhs
= gimple_call_lhs (e
->call_stmt
);
1283 gimple_stmt_iterator gsi
;
1284 #ifdef ENABLE_CHECKING
1294 e
->speculative_call_info (e
, e2
, ref
);
1295 /* If there already is an direct call (i.e. as a result of inliner's
1296 substitution), forget about speculating. */
1298 e
= e
->resolve_speculation (decl
);
1299 /* If types do not match, speculation was likely wrong.
1300 The direct edge was posisbly redirected to the clone with a different
1301 signature. We did not update the call statement yet, so compare it
1302 with the reference that still points to the proper type. */
1303 else if (!gimple_check_call_matching_types (e
->call_stmt
,
1304 ref
->referred
->decl
,
1308 fprintf (dump_file
, "Not expanding speculative call of %s/%i -> %s/%i\n"
1310 xstrdup_for_dump (e
->caller
->name ()),
1312 xstrdup_for_dump (e
->callee
->name ()),
1314 e
= e
->resolve_speculation ();
1315 /* We are producing the final function body and will throw away the
1316 callgraph edges really soon. Reset the counts/frequencies to
1317 keep verifier happy in the case of roundoff errors. */
1318 e
->count
= gimple_bb (e
->call_stmt
)->count
;
1319 e
->frequency
= compute_call_stmt_bb_frequency
1320 (e
->caller
->decl
, gimple_bb (e
->call_stmt
));
1322 /* Expand speculation into GIMPLE code. */
1327 "Expanding speculative call of %s/%i -> %s/%i count:"
1329 xstrdup_for_dump (e
->caller
->name ()),
1331 xstrdup_for_dump (e
->callee
->name ()),
1334 gcc_assert (e2
->speculative
);
1335 push_cfun (DECL_STRUCT_FUNCTION (e
->caller
->decl
));
1336 new_stmt
= gimple_ic (e
->call_stmt
,
1337 dyn_cast
<cgraph_node
*> (ref
->referred
),
1338 e
->count
|| e2
->count
1339 ? RDIV (e
->count
* REG_BR_PROB_BASE
,
1340 e
->count
+ e2
->count
)
1341 : e
->frequency
|| e2
->frequency
1342 ? RDIV (e
->frequency
* REG_BR_PROB_BASE
,
1343 e
->frequency
+ e2
->frequency
)
1344 : REG_BR_PROB_BASE
/ 2,
1345 e
->count
, e
->count
+ e2
->count
);
1346 e
->speculative
= false;
1347 e
->caller
->set_call_stmt_including_clones (e
->call_stmt
, new_stmt
,
1350 /* Fix edges for BUILT_IN_CHKP_BNDRET calls attached to the
1351 processed call stmt. */
1352 if (gimple_call_with_bounds_p (new_stmt
)
1353 && gimple_call_lhs (new_stmt
)
1354 && chkp_retbnd_call_by_val (gimple_call_lhs (e2
->call_stmt
)))
1356 tree dresult
= gimple_call_lhs (new_stmt
);
1357 tree iresult
= gimple_call_lhs (e2
->call_stmt
);
1358 gcall
*dbndret
= chkp_retbnd_call_by_val (dresult
);
1359 gcall
*ibndret
= chkp_retbnd_call_by_val (iresult
);
1360 struct cgraph_edge
*iedge
1361 = e2
->caller
->cgraph_node::get_edge (ibndret
);
1362 struct cgraph_edge
*dedge
;
1366 dedge
= iedge
->caller
->create_edge (iedge
->callee
,
1369 dedge
->frequency
= compute_call_stmt_bb_frequency
1370 (dedge
->caller
->decl
, gimple_bb (dedge
->call_stmt
));
1372 iedge
->frequency
= compute_call_stmt_bb_frequency
1373 (iedge
->caller
->decl
, gimple_bb (iedge
->call_stmt
));
1376 e
->frequency
= compute_call_stmt_bb_frequency
1377 (e
->caller
->decl
, gimple_bb (e
->call_stmt
));
1378 e2
->frequency
= compute_call_stmt_bb_frequency
1379 (e2
->caller
->decl
, gimple_bb (e2
->call_stmt
));
1380 e2
->speculative
= false;
1381 ref
->speculative
= false;
1383 /* Indirect edges are not both in the call site hash.
1385 if (e
->caller
->call_site_hash
)
1386 cgraph_update_edge_in_call_site_hash (e2
);
1388 /* Continue redirecting E to proper target. */
1392 if (e
->indirect_unknown_callee
1393 || decl
== e
->callee
->decl
)
1394 return e
->call_stmt
;
1396 #ifdef ENABLE_CHECKING
1399 node
= cgraph_node::get (decl
);
1400 gcc_assert (!node
|| !node
->clone
.combined_args_to_skip
);
1404 if (symtab
->dump_file
)
1406 fprintf (symtab
->dump_file
, "updating call of %s/%i -> %s/%i: ",
1407 xstrdup_for_dump (e
->caller
->name ()), e
->caller
->order
,
1408 xstrdup_for_dump (e
->callee
->name ()), e
->callee
->order
);
1409 print_gimple_stmt (symtab
->dump_file
, e
->call_stmt
, 0, dump_flags
);
1410 if (e
->callee
->clone
.combined_args_to_skip
)
1412 fprintf (symtab
->dump_file
, " combined args to skip: ");
1413 dump_bitmap (symtab
->dump_file
,
1414 e
->callee
->clone
.combined_args_to_skip
);
1418 if (e
->callee
->clone
.combined_args_to_skip
)
1423 = gimple_call_copy_skip_args (e
->call_stmt
,
1424 e
->callee
->clone
.combined_args_to_skip
);
1425 gimple_call_set_fndecl (new_stmt
, e
->callee
->decl
);
1426 gimple_call_set_fntype (new_stmt
, gimple_call_fntype (e
->call_stmt
));
1428 if (gimple_vdef (new_stmt
)
1429 && TREE_CODE (gimple_vdef (new_stmt
)) == SSA_NAME
)
1430 SSA_NAME_DEF_STMT (gimple_vdef (new_stmt
)) = new_stmt
;
1432 gsi
= gsi_for_stmt (e
->call_stmt
);
1433 gsi_replace (&gsi
, new_stmt
, false);
1434 /* We need to defer cleaning EH info on the new statement to
1435 fixup-cfg. We may not have dominator information at this point
1436 and thus would end up with unreachable blocks and have no way
1437 to communicate that we need to run CFG cleanup then. */
1438 lp_nr
= lookup_stmt_eh_lp (e
->call_stmt
);
1441 remove_stmt_from_eh_lp (e
->call_stmt
);
1442 add_stmt_to_eh_lp (new_stmt
, lp_nr
);
1447 new_stmt
= e
->call_stmt
;
1448 gimple_call_set_fndecl (new_stmt
, e
->callee
->decl
);
1449 update_stmt_fn (DECL_STRUCT_FUNCTION (e
->caller
->decl
), new_stmt
);
1452 /* If the call becomes noreturn, remove the lhs. */
1453 if (lhs
&& (gimple_call_flags (new_stmt
) & ECF_NORETURN
))
1455 if (TREE_CODE (lhs
) == SSA_NAME
)
1457 tree var
= create_tmp_reg_fn (DECL_STRUCT_FUNCTION (e
->caller
->decl
),
1458 TREE_TYPE (lhs
), NULL
);
1459 var
= get_or_create_ssa_default_def
1460 (DECL_STRUCT_FUNCTION (e
->caller
->decl
), var
);
1461 gimple set_stmt
= gimple_build_assign (lhs
, var
);
1462 gsi
= gsi_for_stmt (new_stmt
);
1463 gsi_insert_before_without_update (&gsi
, set_stmt
, GSI_SAME_STMT
);
1464 update_stmt_fn (DECL_STRUCT_FUNCTION (e
->caller
->decl
), set_stmt
);
1466 gimple_call_set_lhs (new_stmt
, NULL_TREE
);
1467 update_stmt_fn (DECL_STRUCT_FUNCTION (e
->caller
->decl
), new_stmt
);
1470 /* If new callee has no static chain, remove it. */
1471 if (gimple_call_chain (new_stmt
) && !DECL_STATIC_CHAIN (e
->callee
->decl
))
1473 gimple_call_set_chain (new_stmt
, NULL
);
1474 update_stmt_fn (DECL_STRUCT_FUNCTION (e
->caller
->decl
), new_stmt
);
1477 maybe_remove_unused_call_args (DECL_STRUCT_FUNCTION (e
->caller
->decl
),
1480 e
->caller
->set_call_stmt_including_clones (e
->call_stmt
, new_stmt
, false);
1482 if (symtab
->dump_file
)
1484 fprintf (symtab
->dump_file
, " updated to:");
1485 print_gimple_stmt (symtab
->dump_file
, e
->call_stmt
, 0, dump_flags
);
1490 /* Update or remove the corresponding cgraph edge if a GIMPLE_CALL
1491 OLD_STMT changed into NEW_STMT. OLD_CALL is gimple_call_fndecl
1492 of OLD_STMT if it was previously call statement.
1493 If NEW_STMT is NULL, the call has been dropped without any
1497 cgraph_update_edges_for_call_stmt_node (cgraph_node
*node
,
1498 gimple old_stmt
, tree old_call
,
1501 tree new_call
= (new_stmt
&& is_gimple_call (new_stmt
))
1502 ? gimple_call_fndecl (new_stmt
) : 0;
1504 /* We are seeing indirect calls, then there is nothing to update. */
1505 if (!new_call
&& !old_call
)
1507 /* See if we turned indirect call into direct call or folded call to one builtin
1508 into different builtin. */
1509 if (old_call
!= new_call
)
1511 cgraph_edge
*e
= node
->get_edge (old_stmt
);
1512 cgraph_edge
*ne
= NULL
;
1518 /* See if the edge is already there and has the correct callee. It
1519 might be so because of indirect inlining has already updated
1520 it. We also might've cloned and redirected the edge. */
1521 if (new_call
&& e
->callee
)
1523 cgraph_node
*callee
= e
->callee
;
1526 if (callee
->decl
== new_call
1527 || callee
->former_clone_of
== new_call
)
1529 e
->set_call_stmt (as_a
<gcall
*> (new_stmt
));
1532 callee
= callee
->clone_of
;
1536 /* Otherwise remove edge and create new one; we can't simply redirect
1537 since function has changed, so inline plan and other information
1538 attached to edge is invalid. */
1540 frequency
= e
->frequency
;
1541 if (e
->indirect_unknown_callee
|| e
->inline_failed
)
1544 e
->callee
->remove_symbol_and_inline_clones ();
1548 /* We are seeing new direct call; compute profile info based on BB. */
1549 basic_block bb
= gimple_bb (new_stmt
);
1551 frequency
= compute_call_stmt_bb_frequency (current_function_decl
,
1557 ne
= node
->create_edge (cgraph_node::get_create (new_call
),
1558 as_a
<gcall
*> (new_stmt
), count
,
1560 gcc_assert (ne
->inline_failed
);
1563 /* We only updated the call stmt; update pointer in cgraph edge.. */
1564 else if (old_stmt
!= new_stmt
)
1565 node
->get_edge (old_stmt
)->set_call_stmt (as_a
<gcall
*> (new_stmt
));
1568 /* Update or remove the corresponding cgraph edge if a GIMPLE_CALL
1569 OLD_STMT changed into NEW_STMT. OLD_DECL is gimple_call_fndecl
1570 of OLD_STMT before it was updated (updating can happen inplace). */
1573 cgraph_update_edges_for_call_stmt (gimple old_stmt
, tree old_decl
, gimple new_stmt
)
1575 cgraph_node
*orig
= cgraph_node::get (cfun
->decl
);
1578 gcc_checking_assert (orig
);
1579 cgraph_update_edges_for_call_stmt_node (orig
, old_stmt
, old_decl
, new_stmt
);
1581 for (node
= orig
->clones
; node
!= orig
;)
1583 cgraph_update_edges_for_call_stmt_node (node
, old_stmt
, old_decl
, new_stmt
);
1585 node
= node
->clones
;
1586 else if (node
->next_sibling_clone
)
1587 node
= node
->next_sibling_clone
;
1590 while (node
!= orig
&& !node
->next_sibling_clone
)
1591 node
= node
->clone_of
;
1593 node
= node
->next_sibling_clone
;
1599 /* Remove all callees from the node. */
1602 cgraph_node::remove_callees (void)
1606 /* It is sufficient to remove the edges from the lists of callers of
1607 the callees. The callee list of the node can be zapped with one
1609 for (e
= callees
; e
; e
= f
)
1612 symtab
->call_edge_removal_hooks (e
);
1613 if (!e
->indirect_unknown_callee
)
1614 e
->remove_callee ();
1615 symtab
->free_edge (e
);
1617 for (e
= indirect_calls
; e
; e
= f
)
1620 symtab
->call_edge_removal_hooks (e
);
1621 if (!e
->indirect_unknown_callee
)
1622 e
->remove_callee ();
1623 symtab
->free_edge (e
);
1625 indirect_calls
= NULL
;
1629 call_site_hash
->empty ();
1630 call_site_hash
= NULL
;
1634 /* Remove all callers from the node. */
1637 cgraph_node::remove_callers (void)
1641 /* It is sufficient to remove the edges from the lists of callees of
1642 the callers. The caller list of the node can be zapped with one
1644 for (e
= callers
; e
; e
= f
)
1647 symtab
->call_edge_removal_hooks (e
);
1648 e
->remove_caller ();
1649 symtab
->free_edge (e
);
1654 /* Helper function for cgraph_release_function_body and free_lang_data.
1655 It releases body from function DECL without having to inspect its
1656 possibly non-existent symtab node. */
1659 release_function_body (tree decl
)
1661 if (DECL_STRUCT_FUNCTION (decl
))
1663 if (DECL_STRUCT_FUNCTION (decl
)->cfg
1664 || DECL_STRUCT_FUNCTION (decl
)->gimple_df
)
1666 push_cfun (DECL_STRUCT_FUNCTION (decl
));
1670 cfun
->curr_properties
&= ~PROP_loops
;
1671 loop_optimizer_finalize ();
1673 if (cfun
->gimple_df
)
1676 delete_tree_cfg_annotations ();
1681 gcc_assert (!dom_info_available_p (CDI_DOMINATORS
));
1682 gcc_assert (!dom_info_available_p (CDI_POST_DOMINATORS
));
1686 if (cfun
->value_histograms
)
1690 gimple_set_body (decl
, NULL
);
1691 /* Struct function hangs a lot of data that would leak if we didn't
1692 removed all pointers to it. */
1693 ggc_free (DECL_STRUCT_FUNCTION (decl
));
1694 DECL_STRUCT_FUNCTION (decl
) = NULL
;
1696 DECL_SAVED_TREE (decl
) = NULL
;
1699 /* Release memory used to represent body of function.
1700 Use this only for functions that are released before being translated to
1701 target code (i.e. RTL). Functions that are compiled to RTL and beyond
1702 are free'd in final.c via free_after_compilation().
1703 KEEP_ARGUMENTS are useful only if you want to rebuild body as thunk. */
1706 cgraph_node::release_body (bool keep_arguments
)
1708 ipa_transforms_to_apply
.release ();
1709 if (!used_as_abstract_origin
&& symtab
->state
!= PARSING
)
1711 DECL_RESULT (decl
) = NULL
;
1713 if (!keep_arguments
)
1714 DECL_ARGUMENTS (decl
) = NULL
;
1716 /* If the node is abstract and needed, then do not clear DECL_INITIAL
1717 of its associated function function declaration because it's
1718 needed to emit debug info later. */
1719 if (!used_as_abstract_origin
&& DECL_INITIAL (decl
))
1720 DECL_INITIAL (decl
) = error_mark_node
;
1721 release_function_body (decl
);
1724 lto_free_function_in_decl_state_for_node (this);
1725 lto_file_data
= NULL
;
1729 /* Remove function from symbol table. */
1732 cgraph_node::remove (void)
1735 int uid
= this->uid
;
1737 symtab
->call_cgraph_removal_hooks (this);
1740 ipa_transforms_to_apply
.release ();
1742 /* Incremental inlining access removed nodes stored in the postorder list.
1744 force_output
= false;
1745 forced_by_abi
= false;
1746 for (n
= nested
; n
; n
= n
->next_nested
)
1751 cgraph_node
**node2
= &origin
->nested
;
1753 while (*node2
!= this)
1754 node2
= &(*node2
)->next_nested
;
1755 *node2
= next_nested
;
1758 if (prev_sibling_clone
)
1759 prev_sibling_clone
->next_sibling_clone
= next_sibling_clone
;
1761 clone_of
->clones
= next_sibling_clone
;
1762 if (next_sibling_clone
)
1763 next_sibling_clone
->prev_sibling_clone
= prev_sibling_clone
;
1766 cgraph_node
*n
, *next
;
1770 for (n
= clones
; n
->next_sibling_clone
; n
= n
->next_sibling_clone
)
1771 n
->clone_of
= clone_of
;
1772 n
->clone_of
= clone_of
;
1773 n
->next_sibling_clone
= clone_of
->clones
;
1774 if (clone_of
->clones
)
1775 clone_of
->clones
->prev_sibling_clone
= n
;
1776 clone_of
->clones
= clones
;
1780 /* We are removing node with clones. This makes clones inconsistent,
1781 but assume they will be removed subsequently and just keep clone
1782 tree intact. This can happen in unreachable function removal since
1783 we remove unreachable functions in random order, not by bottom-up
1784 walk of clone trees. */
1785 for (n
= clones
; n
; n
= next
)
1787 next
= n
->next_sibling_clone
;
1788 n
->next_sibling_clone
= NULL
;
1789 n
->prev_sibling_clone
= NULL
;
1795 /* While all the clones are removed after being proceeded, the function
1796 itself is kept in the cgraph even after it is compiled. Check whether
1797 we are done with this body and reclaim it proactively if this is the case.
1799 if (symtab
->state
!= LTO_STREAMING
)
1801 n
= cgraph_node::get (decl
);
1803 || (!n
->clones
&& !n
->clone_of
&& !n
->global
.inlined_to
1804 && ((symtab
->global_info_ready
|| in_lto_p
)
1805 && (TREE_ASM_WRITTEN (n
->decl
)
1806 || DECL_EXTERNAL (n
->decl
)
1808 || (!flag_wpa
&& n
->in_other_partition
)))))
1813 lto_free_function_in_decl_state_for_node (this);
1814 lto_file_data
= NULL
;
1820 call_site_hash
->empty ();
1821 call_site_hash
= NULL
;
1824 if (instrumented_version
)
1826 instrumented_version
->instrumented_version
= NULL
;
1827 instrumented_version
= NULL
;
1830 symtab
->release_symbol (this, uid
);
1833 /* Likewise indicate that a node is having address taken. */
1836 cgraph_node::mark_address_taken (void)
1838 /* Indirect inlining can figure out that all uses of the address are
1840 if (global
.inlined_to
)
1842 gcc_assert (cfun
->after_inlining
);
1843 gcc_assert (callers
->indirect_inlining_edge
);
1846 /* FIXME: address_taken flag is used both as a shortcut for testing whether
1847 IPA_REF_ADDR reference exists (and thus it should be set on node
1848 representing alias we take address of) and as a test whether address
1849 of the object was taken (and thus it should be set on node alias is
1850 referring to). We should remove the first use and the remove the
1853 cgraph_node
*node
= ultimate_alias_target ();
1854 node
->address_taken
= 1;
1857 /* Return local info for the compiled function. */
1860 cgraph_node::local_info (tree decl
)
1862 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
);
1863 cgraph_node
*node
= get (decl
);
1866 return &node
->ultimate_alias_target ()->local
;
1869 /* Return local info for the compiled function. */
1872 cgraph_node::rtl_info (tree decl
)
1874 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
);
1875 cgraph_node
*node
= get (decl
);
1878 node
= node
->ultimate_alias_target ();
1879 if (node
->decl
!= current_function_decl
1880 && !TREE_ASM_WRITTEN (node
->decl
))
1882 return &node
->ultimate_alias_target ()->rtl
;
1885 /* Return a string describing the failure REASON. */
1888 cgraph_inline_failed_string (cgraph_inline_failed_t reason
)
1891 #define DEFCIFCODE(code, type, string) string,
1893 static const char *cif_string_table
[CIF_N_REASONS
] = {
1894 #include "cif-code.def"
1897 /* Signedness of an enum type is implementation defined, so cast it
1898 to unsigned before testing. */
1899 gcc_assert ((unsigned) reason
< CIF_N_REASONS
);
1900 return cif_string_table
[reason
];
1903 /* Return a type describing the failure REASON. */
1905 cgraph_inline_failed_type_t
1906 cgraph_inline_failed_type (cgraph_inline_failed_t reason
)
1909 #define DEFCIFCODE(code, type, string) type,
1911 static cgraph_inline_failed_type_t cif_type_table
[CIF_N_REASONS
] = {
1912 #include "cif-code.def"
1915 /* Signedness of an enum type is implementation defined, so cast it
1916 to unsigned before testing. */
1917 gcc_assert ((unsigned) reason
< CIF_N_REASONS
);
1918 return cif_type_table
[reason
];
1921 /* Names used to print out the availability enum. */
1922 const char * const cgraph_availability_names
[] =
1923 {"unset", "not_available", "overwritable", "available", "local"};
1925 /* Output flags of edge to a file F. */
1928 cgraph_edge::dump_edge_flags (FILE *f
)
1931 fprintf (f
, "(speculative) ");
1933 fprintf (f
, "(inlined) ");
1934 if (indirect_inlining_edge
)
1935 fprintf (f
, "(indirect_inlining) ");
1937 fprintf (f
, "(%"PRId64
"x) ", (int64_t)count
);
1939 fprintf (f
, "(%.2f per call) ", frequency
/ (double)CGRAPH_FREQ_BASE
);
1940 if (can_throw_external
)
1941 fprintf (f
, "(can throw external) ");
1944 /* Dump call graph node to file F. */
1947 cgraph_node::dump (FILE *f
)
1953 if (global
.inlined_to
)
1954 fprintf (f
, " Function %s/%i is inline copy in %s/%i\n",
1955 xstrdup_for_dump (name ()),
1957 xstrdup_for_dump (global
.inlined_to
->name ()),
1958 global
.inlined_to
->order
);
1960 fprintf (f
, " Clone of %s/%i\n",
1961 clone_of
->asm_name (),
1963 if (symtab
->function_flags_ready
)
1964 fprintf (f
, " Availability: %s\n",
1965 cgraph_availability_names
[get_availability ()]);
1968 fprintf (f
, " Profile id: %i\n",
1970 fprintf (f
, " First run: %i\n", tp_first_run
);
1971 fprintf (f
, " Function flags:");
1973 fprintf (f
, " executed %"PRId64
"x",
1976 fprintf (f
, " nested in: %s", origin
->asm_name ());
1977 if (gimple_has_body_p (decl
))
1978 fprintf (f
, " body");
1980 fprintf (f
, " process");
1982 fprintf (f
, " local");
1983 if (local
.redefined_extern_inline
)
1984 fprintf (f
, " redefined_extern_inline");
1985 if (only_called_at_startup
)
1986 fprintf (f
, " only_called_at_startup");
1987 if (only_called_at_exit
)
1988 fprintf (f
, " only_called_at_exit");
1990 fprintf (f
, " tm_clone");
1992 fprintf (f
, " icf_merged");
1994 fprintf (f
, " nonfreeing_fn");
1995 if (DECL_STATIC_CONSTRUCTOR (decl
))
1996 fprintf (f
," static_constructor (priority:%i)", get_init_priority ());
1997 if (DECL_STATIC_DESTRUCTOR (decl
))
1998 fprintf (f
," static_destructor (priority:%i)", get_fini_priority ());
1999 if (frequency
== NODE_FREQUENCY_HOT
)
2000 fprintf (f
, " hot");
2001 if (frequency
== NODE_FREQUENCY_UNLIKELY_EXECUTED
)
2002 fprintf (f
, " unlikely_executed");
2003 if (frequency
== NODE_FREQUENCY_EXECUTED_ONCE
)
2004 fprintf (f
, " executed_once");
2005 if (only_called_at_startup
)
2006 fprintf (f
, " only_called_at_startup");
2007 if (only_called_at_exit
)
2008 fprintf (f
, " only_called_at_exit");
2009 if (opt_for_fn (decl
, optimize_size
))
2010 fprintf (f
, " optimize_size");
2016 fprintf (f
, " Thunk");
2018 fprintf (f
, " of %s (asm: %s)",
2019 lang_hooks
.decl_printable_name (thunk
.alias
, 2),
2020 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (thunk
.alias
)));
2021 fprintf (f
, " fixed offset %i virtual value %i has "
2022 "virtual offset %i)\n",
2023 (int)thunk
.fixed_offset
,
2024 (int)thunk
.virtual_value
,
2025 (int)thunk
.virtual_offset_p
);
2027 if (alias
&& thunk
.alias
2028 && DECL_P (thunk
.alias
))
2030 fprintf (f
, " Alias of %s",
2031 lang_hooks
.decl_printable_name (thunk
.alias
, 2));
2032 if (DECL_ASSEMBLER_NAME_SET_P (thunk
.alias
))
2033 fprintf (f
, " (asm: %s)",
2034 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (thunk
.alias
)));
2038 fprintf (f
, " Called by: ");
2040 for (edge
= callers
; edge
; edge
= edge
->next_caller
)
2042 fprintf (f
, "%s/%i ", edge
->caller
->asm_name (),
2043 edge
->caller
->order
);
2044 edge
->dump_edge_flags (f
);
2047 fprintf (f
, "\n Calls: ");
2048 for (edge
= callees
; edge
; edge
= edge
->next_callee
)
2050 fprintf (f
, "%s/%i ", edge
->callee
->asm_name (),
2051 edge
->callee
->order
);
2052 edge
->dump_edge_flags (f
);
2056 for (edge
= indirect_calls
; edge
; edge
= edge
->next_callee
)
2058 if (edge
->indirect_info
->polymorphic
)
2060 fprintf (f
, " Polymorphic indirect call of type ");
2061 print_generic_expr (f
, edge
->indirect_info
->otr_type
, TDF_SLIM
);
2062 fprintf (f
, " token:%i", (int) edge
->indirect_info
->otr_token
);
2065 fprintf (f
, " Indirect call");
2066 edge
->dump_edge_flags (f
);
2067 if (edge
->indirect_info
->param_index
!= -1)
2069 fprintf (f
, " of param:%i", edge
->indirect_info
->param_index
);
2070 if (edge
->indirect_info
->agg_contents
)
2071 fprintf (f
, " loaded from %s %s at offset %i",
2072 edge
->indirect_info
->member_ptr
? "member ptr" : "aggregate",
2073 edge
->indirect_info
->by_ref
? "passed by reference":"",
2074 (int)edge
->indirect_info
->offset
);
2075 if (edge
->indirect_info
->vptr_changed
)
2076 fprintf (f
, " (vptr maybe changed)");
2079 if (edge
->indirect_info
->polymorphic
)
2080 edge
->indirect_info
->context
.dump (f
);
2083 if (instrumentation_clone
)
2084 fprintf (f
, " Is instrumented version.\n");
2085 else if (instrumented_version
)
2086 fprintf (f
, " Has instrumented version.\n");
2089 /* Dump call graph node NODE to stderr. */
2092 cgraph_node::debug (void)
2097 /* Dump the callgraph to file F. */
2100 cgraph_node::dump_cgraph (FILE *f
)
2104 fprintf (f
, "callgraph:\n\n");
2105 FOR_EACH_FUNCTION (node
)
2109 /* Return true when the DECL can possibly be inlined. */
2112 cgraph_function_possibly_inlined_p (tree decl
)
2114 if (!symtab
->global_info_ready
)
2115 return !DECL_UNINLINABLE (decl
);
2116 return DECL_POSSIBLY_INLINED (decl
);
2119 /* cgraph_node is no longer nested function; update cgraph accordingly. */
2121 cgraph_node::unnest (void)
2123 cgraph_node
**node2
= &origin
->nested
;
2124 gcc_assert (origin
);
2126 while (*node2
!= this)
2127 node2
= &(*node2
)->next_nested
;
2128 *node2
= next_nested
;
2132 /* Return function availability. See cgraph.h for description of individual
2135 cgraph_node::get_availability (void)
2137 enum availability avail
;
2139 avail
= AVAIL_NOT_AVAILABLE
;
2140 else if (local
.local
)
2141 avail
= AVAIL_LOCAL
;
2142 else if (alias
&& weakref
)
2143 ultimate_alias_target (&avail
);
2144 else if (lookup_attribute ("ifunc", DECL_ATTRIBUTES (decl
)))
2145 avail
= AVAIL_INTERPOSABLE
;
2146 else if (!externally_visible
)
2147 avail
= AVAIL_AVAILABLE
;
2148 /* Inline functions are safe to be analyzed even if their symbol can
2149 be overwritten at runtime. It is not meaningful to enforce any sane
2150 behaviour on replacing inline function by different body. */
2151 else if (DECL_DECLARED_INLINE_P (decl
))
2152 avail
= AVAIL_AVAILABLE
;
2154 /* If the function can be overwritten, return OVERWRITABLE. Take
2155 care at least of two notable extensions - the COMDAT functions
2156 used to share template instantiations in C++ (this is symmetric
2157 to code cp_cannot_inline_tree_fn and probably shall be shared and
2158 the inlinability hooks completely eliminated).
2160 ??? Does the C++ one definition rule allow us to always return
2161 AVAIL_AVAILABLE here? That would be good reason to preserve this
2164 else if (decl_replaceable_p (decl
) && !DECL_EXTERNAL (decl
))
2165 avail
= AVAIL_INTERPOSABLE
;
2166 else avail
= AVAIL_AVAILABLE
;
2171 /* Worker for cgraph_node_can_be_local_p. */
2173 cgraph_node_cannot_be_local_p_1 (cgraph_node
*node
, void *)
2175 return !(!node
->force_output
2176 && ((DECL_COMDAT (node
->decl
)
2177 && !node
->forced_by_abi
2178 && !node
->used_from_object_file_p ()
2179 && !node
->same_comdat_group
)
2180 || !node
->externally_visible
));
2183 /* Return true if cgraph_node can be made local for API change.
2184 Extern inline functions and C++ COMDAT functions can be made local
2185 at the expense of possible code size growth if function is used in multiple
2186 compilation units. */
2188 cgraph_node::can_be_local_p (void)
2190 return (!address_taken
2191 && !call_for_symbol_thunks_and_aliases (cgraph_node_cannot_be_local_p_1
,
2195 /* Call callback on cgraph_node, thunks and aliases associated to cgraph_node.
2196 When INCLUDE_OVERWRITABLE is false, overwritable aliases and thunks are
2197 skipped. When EXCLUDE_VIRTUAL_THUNKS is true, virtual thunks are
2200 cgraph_node::call_for_symbol_thunks_and_aliases (bool (*callback
)
2201 (cgraph_node
*, void *),
2203 bool include_overwritable
,
2204 bool exclude_virtual_thunks
)
2209 if (callback (this, data
))
2211 FOR_EACH_ALIAS (this, ref
)
2213 cgraph_node
*alias
= dyn_cast
<cgraph_node
*> (ref
->referring
);
2214 if (include_overwritable
2215 || alias
->get_availability () > AVAIL_INTERPOSABLE
)
2216 if (alias
->call_for_symbol_thunks_and_aliases (callback
, data
,
2217 include_overwritable
,
2218 exclude_virtual_thunks
))
2221 for (e
= callers
; e
; e
= e
->next_caller
)
2222 if (e
->caller
->thunk
.thunk_p
2223 && (include_overwritable
2224 || e
->caller
->get_availability () > AVAIL_INTERPOSABLE
)
2225 && !(exclude_virtual_thunks
2226 && e
->caller
->thunk
.virtual_offset_p
))
2227 if (e
->caller
->call_for_symbol_thunks_and_aliases (callback
, data
,
2228 include_overwritable
,
2229 exclude_virtual_thunks
))
2235 /* Worker to bring NODE local. */
2238 cgraph_node::make_local (cgraph_node
*node
, void *)
2240 gcc_checking_assert (node
->can_be_local_p ());
2241 if (DECL_COMDAT (node
->decl
) || DECL_EXTERNAL (node
->decl
))
2243 node
->make_decl_local ();
2244 node
->set_section (NULL
);
2245 node
->set_comdat_group (NULL
);
2246 node
->externally_visible
= false;
2247 node
->forced_by_abi
= false;
2248 node
->local
.local
= true;
2249 node
->set_section (NULL
);
2250 node
->unique_name
= (node
->resolution
== LDPR_PREVAILING_DEF_IRONLY
2251 || node
->resolution
== LDPR_PREVAILING_DEF_IRONLY_EXP
);
2252 node
->resolution
= LDPR_PREVAILING_DEF_IRONLY
;
2253 gcc_assert (node
->get_availability () == AVAIL_LOCAL
);
2258 /* Bring cgraph node local. */
2261 cgraph_node::make_local (void)
2263 call_for_symbol_thunks_and_aliases (cgraph_node::make_local
, NULL
, true);
2266 /* Worker to set nothrow flag. */
2269 cgraph_set_nothrow_flag_1 (cgraph_node
*node
, void *data
)
2273 TREE_NOTHROW (node
->decl
) = data
!= NULL
;
2276 for (e
= node
->callers
; e
; e
= e
->next_caller
)
2277 e
->can_throw_external
= false;
2281 /* Set TREE_NOTHROW on NODE's decl and on aliases of NODE
2282 if any to NOTHROW. */
2285 cgraph_node::set_nothrow_flag (bool nothrow
)
2287 call_for_symbol_thunks_and_aliases (cgraph_set_nothrow_flag_1
,
2288 (void *)(size_t)nothrow
, false);
2291 /* Worker to set const flag. */
2294 cgraph_set_const_flag_1 (cgraph_node
*node
, void *data
)
2296 /* Static constructors and destructors without a side effect can be
2298 if (data
&& !((size_t)data
& 2))
2300 if (DECL_STATIC_CONSTRUCTOR (node
->decl
))
2301 DECL_STATIC_CONSTRUCTOR (node
->decl
) = 0;
2302 if (DECL_STATIC_DESTRUCTOR (node
->decl
))
2303 DECL_STATIC_DESTRUCTOR (node
->decl
) = 0;
2305 TREE_READONLY (node
->decl
) = data
!= NULL
;
2306 DECL_LOOPING_CONST_OR_PURE_P (node
->decl
) = ((size_t)data
& 2) != 0;
2310 /* Set TREE_READONLY on cgraph_node's decl and on aliases of the node
2311 if any to READONLY. */
2314 cgraph_node::set_const_flag (bool readonly
, bool looping
)
2316 call_for_symbol_thunks_and_aliases (cgraph_set_const_flag_1
,
2317 (void *)(size_t)(readonly
+ (int)looping
* 2),
2321 /* Worker to set pure flag. */
2324 cgraph_set_pure_flag_1 (cgraph_node
*node
, void *data
)
2326 /* Static constructors and destructors without a side effect can be
2328 if (data
&& !((size_t)data
& 2))
2330 if (DECL_STATIC_CONSTRUCTOR (node
->decl
))
2331 DECL_STATIC_CONSTRUCTOR (node
->decl
) = 0;
2332 if (DECL_STATIC_DESTRUCTOR (node
->decl
))
2333 DECL_STATIC_DESTRUCTOR (node
->decl
) = 0;
2335 DECL_PURE_P (node
->decl
) = data
!= NULL
;
2336 DECL_LOOPING_CONST_OR_PURE_P (node
->decl
) = ((size_t)data
& 2) != 0;
2340 /* Set DECL_PURE_P on cgraph_node's decl and on aliases of the node
2344 cgraph_node::set_pure_flag (bool pure
, bool looping
)
2346 call_for_symbol_thunks_and_aliases (cgraph_set_pure_flag_1
,
2347 (void *)(size_t)(pure
+ (int)looping
* 2),
2351 /* Return true when cgraph_node can not return or throw and thus
2352 it is safe to ignore its side effects for IPA analysis. */
2355 cgraph_node::cannot_return_p (void)
2357 int flags
= flags_from_decl_or_type (decl
);
2358 if (!opt_for_fn (decl
, flag_exceptions
))
2359 return (flags
& ECF_NORETURN
) != 0;
2361 return ((flags
& (ECF_NORETURN
| ECF_NOTHROW
))
2362 == (ECF_NORETURN
| ECF_NOTHROW
));
2365 /* Return true when call of edge can not lead to return from caller
2366 and thus it is safe to ignore its side effects for IPA analysis
2367 when computing side effects of the caller.
2368 FIXME: We could actually mark all edges that have no reaching
2369 patch to the exit block or throw to get better results. */
2371 cgraph_edge::cannot_lead_to_return_p (void)
2373 if (caller
->cannot_return_p ())
2375 if (indirect_unknown_callee
)
2377 int flags
= indirect_info
->ecf_flags
;
2378 if (!opt_for_fn (caller
->decl
, flag_exceptions
))
2379 return (flags
& ECF_NORETURN
) != 0;
2381 return ((flags
& (ECF_NORETURN
| ECF_NOTHROW
))
2382 == (ECF_NORETURN
| ECF_NOTHROW
));
2385 return callee
->cannot_return_p ();
2388 /* Return true if the call can be hot. */
2391 cgraph_edge::maybe_hot_p (void)
2393 /* TODO: Export profile_status from cfun->cfg to cgraph_node. */
2395 && opt_for_fn (caller
->decl
, flag_branch_probabilities
)
2396 && !maybe_hot_count_p (NULL
, count
))
2398 if (caller
->frequency
== NODE_FREQUENCY_UNLIKELY_EXECUTED
2400 && callee
->frequency
== NODE_FREQUENCY_UNLIKELY_EXECUTED
))
2402 if (caller
->frequency
> NODE_FREQUENCY_UNLIKELY_EXECUTED
2404 && callee
->frequency
<= NODE_FREQUENCY_EXECUTED_ONCE
))
2406 if (opt_for_fn (caller
->decl
, optimize_size
))
2408 if (caller
->frequency
== NODE_FREQUENCY_HOT
)
2410 if (caller
->frequency
== NODE_FREQUENCY_EXECUTED_ONCE
2411 && frequency
< CGRAPH_FREQ_BASE
* 3 / 2)
2413 if (opt_for_fn (caller
->decl
, flag_guess_branch_prob
))
2415 if (PARAM_VALUE (HOT_BB_FREQUENCY_FRACTION
) == 0
2416 || frequency
<= (CGRAPH_FREQ_BASE
2417 / PARAM_VALUE (HOT_BB_FREQUENCY_FRACTION
)))
2423 /* Worker for cgraph_can_remove_if_no_direct_calls_p. */
2426 nonremovable_p (cgraph_node
*node
, void *)
2428 return !node
->can_remove_if_no_direct_calls_and_refs_p ();
2431 /* Return true if whole comdat group can be removed if there are no direct
2435 cgraph_node::can_remove_if_no_direct_calls_p (bool will_inline
)
2437 struct ipa_ref
*ref
;
2439 /* For local symbols or non-comdat group it is the same as
2440 can_remove_if_no_direct_calls_p. */
2441 if (!externally_visible
|| !same_comdat_group
)
2443 if (DECL_EXTERNAL (decl
))
2447 return !call_for_symbol_and_aliases (nonremovable_p
, NULL
, true);
2450 if (will_inline
&& address_taken
)
2453 /* Otheriwse check if we can remove the symbol itself and then verify
2454 that only uses of the comdat groups are direct call to THIS
2456 if (!can_remove_if_no_direct_calls_and_refs_p ())
2459 /* Check that all refs come from within the comdat group. */
2460 for (int i
= 0; iterate_referring (i
, ref
); i
++)
2461 if (ref
->referring
->get_comdat_group () != get_comdat_group ())
2464 struct cgraph_node
*target
= ultimate_alias_target ();
2465 for (cgraph_node
*next
= dyn_cast
<cgraph_node
*> (same_comdat_group
);
2466 next
!= this; next
= dyn_cast
<cgraph_node
*> (next
->same_comdat_group
))
2468 if (!externally_visible
)
2471 && !next
->can_remove_if_no_direct_calls_and_refs_p ())
2474 /* If we see different symbol than THIS, be sure to check calls. */
2475 if (next
->ultimate_alias_target () != target
)
2476 for (cgraph_edge
*e
= next
->callers
; e
; e
= e
->next_caller
)
2477 if (e
->caller
->get_comdat_group () != get_comdat_group ()
2481 /* If function is not being inlined, we care only about
2482 references outside of the comdat group. */
2484 for (int i
= 0; next
->iterate_referring (i
, ref
); i
++)
2485 if (ref
->referring
->get_comdat_group () != get_comdat_group ())
2491 /* Return true when function cgraph_node can be expected to be removed
2492 from program when direct calls in this compilation unit are removed.
2494 As a special case COMDAT functions are
2495 cgraph_can_remove_if_no_direct_calls_p while the are not
2496 cgraph_only_called_directly_p (it is possible they are called from other
2499 This function behaves as cgraph_only_called_directly_p because eliminating
2500 all uses of COMDAT function does not make it necessarily disappear from
2501 the program unless we are compiling whole program or we do LTO. In this
2502 case we know we win since dynamic linking will not really discard the
2503 linkonce section. */
2506 cgraph_node::will_be_removed_from_program_if_no_direct_calls_p
2509 gcc_assert (!global
.inlined_to
);
2510 if (DECL_EXTERNAL (decl
))
2513 if (!in_lto_p
&& !flag_whole_program
)
2515 /* If the symbol is in comdat group, we need to verify that whole comdat
2516 group becomes unreachable. Technically we could skip references from
2517 within the group, too. */
2518 if (!only_called_directly_p ())
2520 if (same_comdat_group
&& externally_visible
)
2522 struct cgraph_node
*target
= ultimate_alias_target ();
2524 if (will_inline
&& address_taken
)
2526 for (cgraph_node
*next
= dyn_cast
<cgraph_node
*> (same_comdat_group
);
2528 next
= dyn_cast
<cgraph_node
*> (next
->same_comdat_group
))
2530 if (!externally_visible
)
2533 && !next
->only_called_directly_p ())
2536 /* If we see different symbol than THIS,
2537 be sure to check calls. */
2538 if (next
->ultimate_alias_target () != target
)
2539 for (cgraph_edge
*e
= next
->callers
; e
; e
= e
->next_caller
)
2540 if (e
->caller
->get_comdat_group () != get_comdat_group ()
2548 return can_remove_if_no_direct_calls_p (will_inline
);
2552 /* Worker for cgraph_only_called_directly_p. */
2555 cgraph_not_only_called_directly_p_1 (cgraph_node
*node
, void *)
2557 return !node
->only_called_directly_or_aliased_p ();
2560 /* Return true when function cgraph_node and all its aliases are only called
2562 i.e. it is not externally visible, address was not taken and
2563 it is not used in any other non-standard way. */
2566 cgraph_node::only_called_directly_p (void)
2568 gcc_assert (ultimate_alias_target () == this);
2569 return !call_for_symbol_and_aliases (cgraph_not_only_called_directly_p_1
,
2574 /* Collect all callers of NODE. Worker for collect_callers_of_node. */
2577 collect_callers_of_node_1 (cgraph_node
*node
, void *data
)
2579 vec
<cgraph_edge
*> *redirect_callers
= (vec
<cgraph_edge
*> *)data
;
2581 enum availability avail
;
2582 node
->ultimate_alias_target (&avail
);
2584 if (avail
> AVAIL_INTERPOSABLE
)
2585 for (cs
= node
->callers
; cs
!= NULL
; cs
= cs
->next_caller
)
2586 if (!cs
->indirect_inlining_edge
)
2587 redirect_callers
->safe_push (cs
);
2591 /* Collect all callers of cgraph_node and its aliases that are known to lead to
2592 cgraph_node (i.e. are not overwritable). */
2595 cgraph_node::collect_callers (void)
2597 vec
<cgraph_edge
*> redirect_callers
= vNULL
;
2598 call_for_symbol_thunks_and_aliases (collect_callers_of_node_1
,
2599 &redirect_callers
, false);
2600 return redirect_callers
;
2603 /* Return TRUE if NODE2 a clone of NODE or is equivalent to it. */
2606 clone_of_p (cgraph_node
*node
, cgraph_node
*node2
)
2608 bool skipped_thunk
= false;
2609 node
= node
->ultimate_alias_target ();
2610 node2
= node2
->ultimate_alias_target ();
2612 /* There are no virtual clones of thunks so check former_clone_of or if we
2613 might have skipped thunks because this adjustments are no longer
2615 while (node
->thunk
.thunk_p
)
2617 if (node2
->former_clone_of
== node
->decl
)
2619 if (!node
->thunk
.this_adjusting
)
2621 node
= node
->callees
->callee
->ultimate_alias_target ();
2622 skipped_thunk
= true;
2627 if (!node2
->clone
.args_to_skip
2628 || !bitmap_bit_p (node2
->clone
.args_to_skip
, 0))
2630 if (node2
->former_clone_of
== node
->decl
)
2632 else if (!node2
->clone_of
)
2636 while (node
!= node2
&& node2
)
2637 node2
= node2
->clone_of
;
2638 return node2
!= NULL
;
2641 /* Verify edge count and frequency. */
2644 cgraph_edge::verify_count_and_frequency ()
2646 bool error_found
= false;
2649 error ("caller edge count is negative");
2654 error ("caller edge frequency is negative");
2657 if (frequency
> CGRAPH_FREQ_MAX
)
2659 error ("caller edge frequency is too large");
2662 if (gimple_has_body_p (caller
->decl
)
2663 && !caller
->global
.inlined_to
2665 /* FIXME: Inline-analysis sets frequency to 0 when edge is optimized out.
2666 Remove this once edges are actually removed from the function at that time. */
2668 || (inline_edge_summary_vec
.exists ()
2669 && ((inline_edge_summary_vec
.length () <= (unsigned) uid
)
2670 || !inline_edge_summary (this)->predicate
)))
2672 != compute_call_stmt_bb_frequency (caller
->decl
,
2673 gimple_bb (call_stmt
))))
2675 error ("caller edge frequency %i does not match BB frequency %i",
2677 compute_call_stmt_bb_frequency (caller
->decl
,
2678 gimple_bb (call_stmt
)));
2684 /* Switch to THIS_CFUN if needed and print STMT to stderr. */
2686 cgraph_debug_gimple_stmt (function
*this_cfun
, gimple stmt
)
2688 bool fndecl_was_null
= false;
2689 /* debug_gimple_stmt needs correct cfun */
2690 if (cfun
!= this_cfun
)
2691 set_cfun (this_cfun
);
2692 /* ...and an actual current_function_decl */
2693 if (!current_function_decl
)
2695 current_function_decl
= this_cfun
->decl
;
2696 fndecl_was_null
= true;
2698 debug_gimple_stmt (stmt
);
2699 if (fndecl_was_null
)
2700 current_function_decl
= NULL
;
2703 /* Verify that call graph edge corresponds to DECL from the associated
2704 statement. Return true if the verification should fail. */
2707 cgraph_edge::verify_corresponds_to_fndecl (tree decl
)
2711 if (!decl
|| callee
->global
.inlined_to
)
2713 if (symtab
->state
== LTO_STREAMING
)
2715 node
= cgraph_node::get (decl
);
2717 /* We do not know if a node from a different partition is an alias or what it
2718 aliases and therefore cannot do the former_clone_of check reliably. When
2719 body_removed is set, we have lost all information about what was alias or
2720 thunk of and also cannot proceed. */
2722 || node
->body_removed
2723 || node
->in_other_partition
2724 || callee
->icf_merged
2725 || callee
->in_other_partition
)
2728 node
= node
->ultimate_alias_target ();
2730 /* Optimizers can redirect unreachable calls or calls triggering undefined
2731 behaviour to builtin_unreachable. */
2732 if (DECL_BUILT_IN_CLASS (callee
->decl
) == BUILT_IN_NORMAL
2733 && DECL_FUNCTION_CODE (callee
->decl
) == BUILT_IN_UNREACHABLE
)
2736 if (callee
->former_clone_of
!= node
->decl
2737 && (node
!= callee
->ultimate_alias_target ())
2738 && !clone_of_p (node
, callee
))
2744 /* Verify cgraph nodes of given cgraph node. */
2746 cgraph_node::verify_node (void)
2749 function
*this_cfun
= DECL_STRUCT_FUNCTION (decl
);
2750 basic_block this_block
;
2751 gimple_stmt_iterator gsi
;
2752 bool error_found
= false;
2757 timevar_push (TV_CGRAPH_VERIFY
);
2758 error_found
|= verify_base ();
2759 for (e
= callees
; e
; e
= e
->next_callee
)
2762 error ("aux field set for edge %s->%s",
2763 identifier_to_locale (e
->caller
->name ()),
2764 identifier_to_locale (e
->callee
->name ()));
2769 error ("execution count is negative");
2772 if (global
.inlined_to
&& same_comdat_group
)
2774 error ("inline clone in same comdat group list");
2777 if (!definition
&& !in_other_partition
&& local
.local
)
2779 error ("local symbols must be defined");
2782 if (global
.inlined_to
&& externally_visible
)
2784 error ("externally visible inline clone");
2787 if (global
.inlined_to
&& address_taken
)
2789 error ("inline clone with address taken");
2792 if (global
.inlined_to
&& force_output
)
2794 error ("inline clone is forced to output");
2797 for (e
= indirect_calls
; e
; e
= e
->next_callee
)
2801 error ("aux field set for indirect edge from %s",
2802 identifier_to_locale (e
->caller
->name ()));
2805 if (!e
->indirect_unknown_callee
2806 || !e
->indirect_info
)
2808 error ("An indirect edge from %s is not marked as indirect or has "
2809 "associated indirect_info, the corresponding statement is: ",
2810 identifier_to_locale (e
->caller
->name ()));
2811 cgraph_debug_gimple_stmt (this_cfun
, e
->call_stmt
);
2815 bool check_comdat
= comdat_local_p ();
2816 for (e
= callers
; e
; e
= e
->next_caller
)
2818 if (e
->verify_count_and_frequency ())
2821 && !in_same_comdat_group_p (e
->caller
))
2823 error ("comdat-local function called by %s outside its comdat",
2824 identifier_to_locale (e
->caller
->name ()));
2827 if (!e
->inline_failed
)
2829 if (global
.inlined_to
2830 != (e
->caller
->global
.inlined_to
2831 ? e
->caller
->global
.inlined_to
: e
->caller
))
2833 error ("inlined_to pointer is wrong");
2836 if (callers
->next_caller
)
2838 error ("multiple inline callers");
2843 if (global
.inlined_to
)
2845 error ("inlined_to pointer set for noninline callers");
2849 for (e
= indirect_calls
; e
; e
= e
->next_callee
)
2850 if (e
->verify_count_and_frequency ())
2852 if (!callers
&& global
.inlined_to
)
2854 error ("inlined_to pointer is set but no predecessors found");
2857 if (global
.inlined_to
== this)
2859 error ("inlined_to pointer refers to itself");
2866 for (n
= clone_of
->clones
; n
; n
= n
->next_sibling_clone
)
2871 error ("cgraph_node has wrong clone_of");
2878 for (n
= clones
; n
; n
= n
->next_sibling_clone
)
2879 if (n
->clone_of
!= this)
2883 error ("cgraph_node has wrong clone list");
2887 if ((prev_sibling_clone
|| next_sibling_clone
) && !clone_of
)
2889 error ("cgraph_node is in clone list but it is not clone");
2892 if (!prev_sibling_clone
&& clone_of
&& clone_of
->clones
!= this)
2894 error ("cgraph_node has wrong prev_clone pointer");
2897 if (prev_sibling_clone
&& prev_sibling_clone
->next_sibling_clone
!= this)
2899 error ("double linked list of clones corrupted");
2903 if (analyzed
&& alias
)
2905 bool ref_found
= false;
2907 ipa_ref
*ref
= NULL
;
2911 error ("Alias has call edges");
2914 for (i
= 0; iterate_reference (i
, ref
); i
++)
2915 if (ref
->use
== IPA_REF_CHKP
)
2917 else if (ref
->use
!= IPA_REF_ALIAS
)
2919 error ("Alias has non-alias reference");
2924 error ("Alias has more than one alias reference");
2931 error ("Analyzed alias has no reference");
2936 /* Check instrumented version reference. */
2937 if (instrumented_version
2938 && instrumented_version
->instrumented_version
!= this)
2940 error ("Instrumentation clone does not reference original node");
2944 /* Cannot have orig_decl for not instrumented nodes. */
2945 if (!instrumentation_clone
&& orig_decl
)
2947 error ("Not instrumented node has non-NULL original declaration");
2951 /* If original not instrumented node still exists then we may check
2952 original declaration is set properly. */
2953 if (instrumented_version
2955 && orig_decl
!= instrumented_version
->decl
)
2957 error ("Instrumented node has wrong original declaration");
2961 /* Check all nodes have chkp reference to their instrumented versions. */
2963 && instrumented_version
2964 && !instrumentation_clone
)
2966 bool ref_found
= false;
2968 struct ipa_ref
*ref
;
2970 for (i
= 0; iterate_reference (i
, ref
); i
++)
2971 if (ref
->use
== IPA_REF_CHKP
)
2975 error ("Node has more than one chkp reference");
2978 if (ref
->referred
!= instrumented_version
)
2980 error ("Wrong node is referenced with chkp reference");
2988 error ("Analyzed node has no reference to instrumented version");
2993 if (analyzed
&& thunk
.thunk_p
)
2997 error ("No edge out of thunk node");
3000 else if (callees
->next_callee
)
3002 error ("More than one edge out of thunk node");
3005 if (gimple_has_body_p (decl
))
3007 error ("Thunk is not supposed to have body");
3010 if (thunk
.add_pointer_bounds_args
3011 && !instrumented_version
->semantically_equivalent_p (callees
->callee
))
3013 error ("Instrumentation thunk has wrong edge callee");
3017 else if (analyzed
&& gimple_has_body_p (decl
)
3018 && !TREE_ASM_WRITTEN (decl
)
3019 && (!DECL_EXTERNAL (decl
) || global
.inlined_to
)
3024 hash_set
<gimple
> stmts
;
3026 ipa_ref
*ref
= NULL
;
3028 /* Reach the trees by walking over the CFG, and note the
3029 enclosing basic-blocks in the call edges. */
3030 FOR_EACH_BB_FN (this_block
, this_cfun
)
3032 for (gsi
= gsi_start_phis (this_block
);
3033 !gsi_end_p (gsi
); gsi_next (&gsi
))
3034 stmts
.add (gsi_stmt (gsi
));
3035 for (gsi
= gsi_start_bb (this_block
);
3039 gimple stmt
= gsi_stmt (gsi
);
3041 if (is_gimple_call (stmt
))
3043 cgraph_edge
*e
= get_edge (stmt
);
3044 tree decl
= gimple_call_fndecl (stmt
);
3049 error ("shared call_stmt:");
3050 cgraph_debug_gimple_stmt (this_cfun
, stmt
);
3053 if (!e
->indirect_unknown_callee
)
3055 if (e
->verify_corresponds_to_fndecl (decl
))
3057 error ("edge points to wrong declaration:");
3058 debug_tree (e
->callee
->decl
);
3059 fprintf (stderr
," Instead of:");
3066 error ("an indirect edge with unknown callee "
3067 "corresponding to a call_stmt with "
3068 "a known declaration:");
3070 cgraph_debug_gimple_stmt (this_cfun
, e
->call_stmt
);
3076 error ("missing callgraph edge for call stmt:");
3077 cgraph_debug_gimple_stmt (this_cfun
, stmt
);
3083 for (i
= 0; iterate_reference (i
, ref
); i
++)
3084 if (ref
->stmt
&& !stmts
.contains (ref
->stmt
))
3086 error ("reference to dead statement");
3087 cgraph_debug_gimple_stmt (this_cfun
, ref
->stmt
);
3092 /* No CFG available?! */
3095 for (e
= callees
; e
; e
= e
->next_callee
)
3099 error ("edge %s->%s has no corresponding call_stmt",
3100 identifier_to_locale (e
->caller
->name ()),
3101 identifier_to_locale (e
->callee
->name ()));
3102 cgraph_debug_gimple_stmt (this_cfun
, e
->call_stmt
);
3107 for (e
= indirect_calls
; e
; e
= e
->next_callee
)
3109 if (!e
->aux
&& !e
->speculative
)
3111 error ("an indirect edge from %s has no corresponding call_stmt",
3112 identifier_to_locale (e
->caller
->name ()));
3113 cgraph_debug_gimple_stmt (this_cfun
, e
->call_stmt
);
3122 internal_error ("verify_cgraph_node failed");
3124 timevar_pop (TV_CGRAPH_VERIFY
);
3127 /* Verify whole cgraph structure. */
3129 cgraph_node::verify_cgraph_nodes (void)
3136 FOR_EACH_FUNCTION (node
)
3140 /* Walk the alias chain to return the function cgraph_node is alias of.
3141 Walk through thunks, too.
3142 When AVAILABILITY is non-NULL, get minimal availability in the chain. */
3145 cgraph_node::function_symbol (enum availability
*availability
)
3147 cgraph_node
*node
= ultimate_alias_target (availability
);
3149 while (node
->thunk
.thunk_p
)
3151 node
= node
->callees
->callee
;
3154 enum availability a
;
3155 a
= node
->get_availability ();
3156 if (a
< *availability
)
3159 node
= node
->ultimate_alias_target (availability
);
3164 /* Walk the alias chain to return the function cgraph_node is alias of.
3165 Walk through non virtual thunks, too. Thus we return either a function
3166 or a virtual thunk node.
3167 When AVAILABILITY is non-NULL, get minimal availability in the chain. */
3170 cgraph_node::function_or_virtual_thunk_symbol
3171 (enum availability
*availability
)
3173 cgraph_node
*node
= ultimate_alias_target (availability
);
3175 while (node
->thunk
.thunk_p
&& !node
->thunk
.virtual_offset_p
)
3177 node
= node
->callees
->callee
;
3180 enum availability a
;
3181 a
= node
->get_availability ();
3182 if (a
< *availability
)
3185 node
= node
->ultimate_alias_target (availability
);
3190 /* When doing LTO, read cgraph_node's body from disk if it is not already
3194 cgraph_node::get_untransformed_body (void)
3196 lto_file_decl_data
*file_data
;
3197 const char *data
, *name
;
3199 tree decl
= this->decl
;
3201 if (DECL_RESULT (decl
))
3204 gcc_assert (in_lto_p
);
3206 timevar_push (TV_IPA_LTO_GIMPLE_IN
);
3208 file_data
= lto_file_data
;
3209 name
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
));
3211 /* We may have renamed the declaration, e.g., a static function. */
3212 name
= lto_get_decl_name_mapping (file_data
, name
);
3214 data
= lto_get_section_data (file_data
, LTO_section_function_body
,
3217 fatal_error (input_location
, "%s: section %s is missing",
3218 file_data
->file_name
,
3221 gcc_assert (DECL_STRUCT_FUNCTION (decl
) == NULL
);
3223 lto_input_function_body (file_data
, this, data
);
3224 lto_stats
.num_function_bodies
++;
3225 lto_free_section_data (file_data
, LTO_section_function_body
, name
,
3227 lto_free_function_in_decl_state_for_node (this);
3228 /* Keep lto file data so ipa-inline-analysis knows about cross module
3231 timevar_pop (TV_IPA_LTO_GIMPLE_IN
);
3236 /* Prepare function body. When doing LTO, read cgraph_node's body from disk
3237 if it is not already present. When some IPA transformations are scheduled,
3241 cgraph_node::get_body (void)
3245 updated
= get_untransformed_body ();
3247 /* Getting transformed body makes no sense for inline clones;
3248 we should never use this on real clones becuase they are materialized
3250 TODO: Materializing clones here will likely lead to smaller LTRANS
3252 gcc_assert (!global
.inlined_to
&& !clone_of
);
3253 if (ipa_transforms_to_apply
.exists ())
3255 opt_pass
*saved_current_pass
= current_pass
;
3256 FILE *saved_dump_file
= dump_file
;
3257 int saved_dump_flags
= dump_flags
;
3259 push_cfun (DECL_STRUCT_FUNCTION (decl
));
3260 execute_all_ipa_transforms ();
3261 cgraph_edge::rebuild_edges ();
3262 free_dominance_info (CDI_DOMINATORS
);
3263 free_dominance_info (CDI_POST_DOMINATORS
);
3267 current_pass
= saved_current_pass
;
3268 dump_file
= saved_dump_file
;
3269 dump_flags
= saved_dump_flags
;
3274 /* Return the DECL_STRUCT_FUNCTION of the function. */
3277 cgraph_node::get_fun (void)
3279 cgraph_node
*node
= this;
3280 struct function
*fun
= DECL_STRUCT_FUNCTION (node
->decl
);
3282 while (!fun
&& node
->clone_of
)
3284 node
= node
->clone_of
;
3285 fun
= DECL_STRUCT_FUNCTION (node
->decl
);
3291 /* Verify if the type of the argument matches that of the function
3292 declaration. If we cannot verify this or there is a mismatch,
3296 gimple_check_call_args (gimple stmt
, tree fndecl
, bool args_count_match
)
3299 unsigned int i
, nargs
;
3301 /* Calls to internal functions always match their signature. */
3302 if (gimple_call_internal_p (stmt
))
3305 nargs
= gimple_call_num_args (stmt
);
3307 /* Get argument types for verification. */
3309 parms
= TYPE_ARG_TYPES (TREE_TYPE (fndecl
));
3311 parms
= TYPE_ARG_TYPES (gimple_call_fntype (stmt
));
3313 /* Verify if the type of the argument matches that of the function
3314 declaration. If we cannot verify this or there is a mismatch,
3316 if (fndecl
&& DECL_ARGUMENTS (fndecl
))
3318 for (i
= 0, p
= DECL_ARGUMENTS (fndecl
);
3320 i
++, p
= DECL_CHAIN (p
))
3323 /* We cannot distinguish a varargs function from the case
3324 of excess parameters, still deferring the inlining decision
3325 to the callee is possible. */
3328 arg
= gimple_call_arg (stmt
, i
);
3329 if (p
== error_mark_node
3330 || DECL_ARG_TYPE (p
) == error_mark_node
3331 || arg
== error_mark_node
3332 || (!types_compatible_p (DECL_ARG_TYPE (p
), TREE_TYPE (arg
))
3333 && !fold_convertible_p (DECL_ARG_TYPE (p
), arg
)))
3336 if (args_count_match
&& p
)
3341 for (i
= 0, p
= parms
; i
< nargs
; i
++, p
= TREE_CHAIN (p
))
3344 /* If this is a varargs function defer inlining decision
3348 arg
= gimple_call_arg (stmt
, i
);
3349 if (TREE_VALUE (p
) == error_mark_node
3350 || arg
== error_mark_node
3351 || TREE_CODE (TREE_VALUE (p
)) == VOID_TYPE
3352 || (!types_compatible_p (TREE_VALUE (p
), TREE_TYPE (arg
))
3353 && !fold_convertible_p (TREE_VALUE (p
), arg
)))
3365 /* Verify if the type of the argument and lhs of CALL_STMT matches
3366 that of the function declaration CALLEE. If ARGS_COUNT_MATCH is
3367 true, the arg count needs to be the same.
3368 If we cannot verify this or there is a mismatch, return false. */
3371 gimple_check_call_matching_types (gimple call_stmt
, tree callee
,
3372 bool args_count_match
)
3376 if ((DECL_RESULT (callee
)
3377 && !DECL_BY_REFERENCE (DECL_RESULT (callee
))
3378 && (lhs
= gimple_call_lhs (call_stmt
)) != NULL_TREE
3379 && !useless_type_conversion_p (TREE_TYPE (DECL_RESULT (callee
)),
3381 && !fold_convertible_p (TREE_TYPE (DECL_RESULT (callee
)), lhs
))
3382 || !gimple_check_call_args (call_stmt
, callee
, args_count_match
))
3387 /* Reset all state within cgraph.c so that we can rerun the compiler
3388 within the same process. For use by toplev::finalize. */
3391 cgraph_c_finalize (void)
3395 x_cgraph_nodes_queue
= NULL
;
3397 cgraph_fnver_htab
= NULL
;
3398 version_info_node
= NULL
;
3401 /* A wroker for call_for_symbol_and_aliases. */
3404 cgraph_node::call_for_symbol_and_aliases_1 (bool (*callback
) (cgraph_node
*,
3407 bool include_overwritable
)
3410 FOR_EACH_ALIAS (this, ref
)
3412 cgraph_node
*alias
= dyn_cast
<cgraph_node
*> (ref
->referring
);
3413 if (include_overwritable
3414 || alias
->get_availability () > AVAIL_INTERPOSABLE
)
3415 if (alias
->call_for_symbol_and_aliases (callback
, data
,
3416 include_overwritable
))
3422 /* Return true if NODE has thunk. */
3425 cgraph_node::has_thunk_p (cgraph_node
*node
, void *)
3427 for (cgraph_edge
*e
= node
->callers
; e
; e
= e
->next_caller
)
3428 if (e
->caller
->thunk
.thunk_p
)
3433 #include "gt-cgraph.h"