2 Copyright (C) 2001-2018 Free Software Foundation, Inc.
3 Contributed by Alexandre Oliva <aoliva@redhat.com>
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
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/>. */
23 #include "coretypes.h"
30 #include "tree-pass.h"
33 #include "tree-pretty-print.h"
34 #include "diagnostic-core.h"
35 #include "gimple-predict.h"
36 #include "fold-const.h"
37 #include "stor-layout.h"
39 #include "tree-inline.h"
40 #include "langhooks.h"
42 #include "tree-iterator.h"
44 #include "gimple-fold.h"
47 #include "gimple-iterator.h"
48 #include "gimplify-me.h"
49 #include "gimple-walk.h"
51 #include "tree-into-ssa.h"
57 #include "value-prof.h"
60 #include "stringpool.h"
64 /* I'm not real happy about this, but we need to handle gimple and
67 /* Inlining, Cloning, Versioning, Parallelization
69 Inlining: a function body is duplicated, but the PARM_DECLs are
70 remapped into VAR_DECLs, and non-void RETURN_EXPRs become
71 MODIFY_EXPRs that store to a dedicated returned-value variable.
72 The duplicated eh_region info of the copy will later be appended
73 to the info for the caller; the eh_region info in copied throwing
74 statements and RESX statements are adjusted accordingly.
76 Cloning: (only in C++) We have one body for a con/de/structor, and
77 multiple function decls, each with a unique parameter list.
78 Duplicate the body, using the given splay tree; some parameters
79 will become constants (like 0 or 1).
81 Versioning: a function body is duplicated and the result is a new
82 function rather than into blocks of an existing function as with
83 inlining. Some parameters will become constants.
85 Parallelization: a region of a function is duplicated resulting in
86 a new function. Variables may be replaced with complex expressions
87 to enable shared variable semantics.
89 All of these will simultaneously lookup any callgraph edges. If
90 we're going to inline the duplicated function body, and the given
91 function has some cloned callgraph nodes (one for each place this
92 function will be inlined) those callgraph edges will be duplicated.
93 If we're cloning the body, those callgraph edges will be
94 updated to point into the new body. (Note that the original
95 callgraph node and edge list will not be altered.)
97 See the CALL_EXPR handling case in copy_tree_body_r (). */
101 o In order to make inlining-on-trees work, we pessimized
102 function-local static constants. In particular, they are now
103 always output, even when not addressed. Fix this by treating
104 function-local static constants just like global static
105 constants; the back-end already knows not to output them if they
108 o Provide heuristics to clamp inlining of recursive template
112 /* Weights that estimate_num_insns uses to estimate the size of the
115 eni_weights eni_size_weights
;
117 /* Weights that estimate_num_insns uses to estimate the time necessary
118 to execute the produced code. */
120 eni_weights eni_time_weights
;
124 static tree
declare_return_variable (copy_body_data
*, tree
, tree
,
126 static void remap_block (tree
*, copy_body_data
*);
127 static void copy_bind_expr (tree
*, int *, copy_body_data
*);
128 static void declare_inline_vars (tree
, tree
);
129 static void remap_save_expr (tree
*, hash_map
<tree
, tree
> *, int *);
130 static void prepend_lexical_block (tree current_block
, tree new_block
);
131 static tree
copy_decl_to_var (tree
, copy_body_data
*);
132 static tree
copy_result_decl_to_var (tree
, copy_body_data
*);
133 static tree
copy_decl_maybe_to_var (tree
, copy_body_data
*);
134 static gimple_seq
remap_gimple_stmt (gimple
*, copy_body_data
*);
135 static bool delete_unreachable_blocks_update_callgraph (copy_body_data
*id
);
136 static void insert_init_stmt (copy_body_data
*, basic_block
, gimple
*);
138 /* Insert a tree->tree mapping for ID. Despite the name suggests
139 that the trees should be variables, it is used for more than that. */
142 insert_decl_map (copy_body_data
*id
, tree key
, tree value
)
144 id
->decl_map
->put (key
, value
);
146 /* Always insert an identity map as well. If we see this same new
147 node again, we won't want to duplicate it a second time. */
149 id
->decl_map
->put (value
, value
);
152 /* Insert a tree->tree mapping for ID. This is only used for
156 insert_debug_decl_map (copy_body_data
*id
, tree key
, tree value
)
158 if (!gimple_in_ssa_p (id
->src_cfun
))
161 if (!opt_for_fn (id
->dst_fn
, flag_var_tracking_assignments
))
164 if (!target_for_debug_bind (key
))
167 gcc_assert (TREE_CODE (key
) == PARM_DECL
);
168 gcc_assert (VAR_P (value
));
171 id
->debug_map
= new hash_map
<tree
, tree
>;
173 id
->debug_map
->put (key
, value
);
176 /* If nonzero, we're remapping the contents of inlined debug
177 statements. If negative, an error has occurred, such as a
178 reference to a variable that isn't available in the inlined
180 static int processing_debug_stmt
= 0;
182 /* Construct new SSA name for old NAME. ID is the inline context. */
185 remap_ssa_name (tree name
, copy_body_data
*id
)
190 gcc_assert (TREE_CODE (name
) == SSA_NAME
);
192 n
= id
->decl_map
->get (name
);
194 return unshare_expr (*n
);
196 if (processing_debug_stmt
)
198 if (SSA_NAME_IS_DEFAULT_DEF (name
)
199 && TREE_CODE (SSA_NAME_VAR (name
)) == PARM_DECL
200 && id
->entry_bb
== NULL
201 && single_succ_p (ENTRY_BLOCK_PTR_FOR_FN (cfun
)))
203 tree vexpr
= make_node (DEBUG_EXPR_DECL
);
205 gimple_stmt_iterator gsi
;
206 tree val
= SSA_NAME_VAR (name
);
208 n
= id
->decl_map
->get (val
);
211 if (TREE_CODE (val
) != PARM_DECL
)
213 processing_debug_stmt
= -1;
216 def_temp
= gimple_build_debug_source_bind (vexpr
, val
, NULL
);
217 DECL_ARTIFICIAL (vexpr
) = 1;
218 TREE_TYPE (vexpr
) = TREE_TYPE (name
);
219 SET_DECL_MODE (vexpr
, DECL_MODE (SSA_NAME_VAR (name
)));
220 gsi
= gsi_after_labels (single_succ (ENTRY_BLOCK_PTR_FOR_FN (cfun
)));
221 gsi_insert_before (&gsi
, def_temp
, GSI_SAME_STMT
);
225 processing_debug_stmt
= -1;
229 /* Remap anonymous SSA names or SSA names of anonymous decls. */
230 var
= SSA_NAME_VAR (name
);
232 || (!SSA_NAME_IS_DEFAULT_DEF (name
)
234 && !VAR_DECL_IS_VIRTUAL_OPERAND (var
)
235 && DECL_ARTIFICIAL (var
)
236 && DECL_IGNORED_P (var
)
237 && !DECL_NAME (var
)))
239 struct ptr_info_def
*pi
;
240 new_tree
= make_ssa_name (remap_type (TREE_TYPE (name
), id
));
241 if (!var
&& SSA_NAME_IDENTIFIER (name
))
242 SET_SSA_NAME_VAR_OR_IDENTIFIER (new_tree
, SSA_NAME_IDENTIFIER (name
));
243 insert_decl_map (id
, name
, new_tree
);
244 SSA_NAME_OCCURS_IN_ABNORMAL_PHI (new_tree
)
245 = SSA_NAME_OCCURS_IN_ABNORMAL_PHI (name
);
246 /* At least IPA points-to info can be directly transferred. */
247 if (id
->src_cfun
->gimple_df
248 && id
->src_cfun
->gimple_df
->ipa_pta
249 && POINTER_TYPE_P (TREE_TYPE (name
))
250 && (pi
= SSA_NAME_PTR_INFO (name
))
253 struct ptr_info_def
*new_pi
= get_ptr_info (new_tree
);
259 /* Do not set DEF_STMT yet as statement is not copied yet. We do that
261 new_tree
= remap_decl (var
, id
);
263 /* We might've substituted constant or another SSA_NAME for
266 Replace the SSA name representing RESULT_DECL by variable during
267 inlining: this saves us from need to introduce PHI node in a case
268 return value is just partly initialized. */
269 if ((VAR_P (new_tree
) || TREE_CODE (new_tree
) == PARM_DECL
)
270 && (!SSA_NAME_VAR (name
)
271 || TREE_CODE (SSA_NAME_VAR (name
)) != RESULT_DECL
272 || !id
->transform_return_to_modify
))
274 struct ptr_info_def
*pi
;
275 new_tree
= make_ssa_name (new_tree
);
276 insert_decl_map (id
, name
, new_tree
);
277 SSA_NAME_OCCURS_IN_ABNORMAL_PHI (new_tree
)
278 = SSA_NAME_OCCURS_IN_ABNORMAL_PHI (name
);
279 /* At least IPA points-to info can be directly transferred. */
280 if (id
->src_cfun
->gimple_df
281 && id
->src_cfun
->gimple_df
->ipa_pta
282 && POINTER_TYPE_P (TREE_TYPE (name
))
283 && (pi
= SSA_NAME_PTR_INFO (name
))
286 struct ptr_info_def
*new_pi
= get_ptr_info (new_tree
);
289 if (SSA_NAME_IS_DEFAULT_DEF (name
))
291 /* By inlining function having uninitialized variable, we might
292 extend the lifetime (variable might get reused). This cause
293 ICE in the case we end up extending lifetime of SSA name across
294 abnormal edge, but also increase register pressure.
296 We simply initialize all uninitialized vars by 0 except
297 for case we are inlining to very first BB. We can avoid
298 this for all BBs that are not inside strongly connected
299 regions of the CFG, but this is expensive to test. */
301 && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (name
)
302 && (!SSA_NAME_VAR (name
)
303 || TREE_CODE (SSA_NAME_VAR (name
)) != PARM_DECL
)
304 && (id
->entry_bb
!= EDGE_SUCC (ENTRY_BLOCK_PTR_FOR_FN (cfun
),
306 || EDGE_COUNT (id
->entry_bb
->preds
) != 1))
308 gimple_stmt_iterator gsi
= gsi_last_bb (id
->entry_bb
);
310 tree zero
= build_zero_cst (TREE_TYPE (new_tree
));
312 init_stmt
= gimple_build_assign (new_tree
, zero
);
313 gsi_insert_after (&gsi
, init_stmt
, GSI_NEW_STMT
);
314 SSA_NAME_IS_DEFAULT_DEF (new_tree
) = 0;
318 SSA_NAME_DEF_STMT (new_tree
) = gimple_build_nop ();
319 set_ssa_default_def (cfun
, SSA_NAME_VAR (new_tree
), new_tree
);
324 insert_decl_map (id
, name
, new_tree
);
328 /* Remap DECL during the copying of the BLOCK tree for the function. */
331 remap_decl (tree decl
, copy_body_data
*id
)
335 /* We only remap local variables in the current function. */
337 /* See if we have remapped this declaration. */
339 n
= id
->decl_map
->get (decl
);
341 if (!n
&& processing_debug_stmt
)
343 processing_debug_stmt
= -1;
347 /* When remapping a type within copy_gimple_seq_and_replace_locals, all
348 necessary DECLs have already been remapped and we do not want to duplicate
349 a decl coming from outside of the sequence we are copying. */
351 && id
->prevent_decl_creation_for_types
352 && id
->remapping_type_depth
> 0
353 && (VAR_P (decl
) || TREE_CODE (decl
) == PARM_DECL
))
356 /* If we didn't already have an equivalent for this declaration, create one
360 /* Make a copy of the variable or label. */
361 tree t
= id
->copy_decl (decl
, id
);
363 /* Remember it, so that if we encounter this local entity again
364 we can reuse this copy. Do this early because remap_type may
365 need this decl for TYPE_STUB_DECL. */
366 insert_decl_map (id
, decl
, t
);
371 /* Remap types, if necessary. */
372 TREE_TYPE (t
) = remap_type (TREE_TYPE (t
), id
);
373 if (TREE_CODE (t
) == TYPE_DECL
)
375 DECL_ORIGINAL_TYPE (t
) = remap_type (DECL_ORIGINAL_TYPE (t
), id
);
377 /* Preserve the invariant that DECL_ORIGINAL_TYPE != TREE_TYPE,
378 which is enforced in gen_typedef_die when DECL_ABSTRACT_ORIGIN
379 is not set on the TYPE_DECL, for example in LTO mode. */
380 if (DECL_ORIGINAL_TYPE (t
) == TREE_TYPE (t
))
382 tree x
= build_variant_type_copy (TREE_TYPE (t
));
383 TYPE_STUB_DECL (x
) = TYPE_STUB_DECL (TREE_TYPE (t
));
384 TYPE_NAME (x
) = TYPE_NAME (TREE_TYPE (t
));
385 DECL_ORIGINAL_TYPE (t
) = x
;
389 /* Remap sizes as necessary. */
390 walk_tree (&DECL_SIZE (t
), copy_tree_body_r
, id
, NULL
);
391 walk_tree (&DECL_SIZE_UNIT (t
), copy_tree_body_r
, id
, NULL
);
393 /* If fields, do likewise for offset and qualifier. */
394 if (TREE_CODE (t
) == FIELD_DECL
)
396 walk_tree (&DECL_FIELD_OFFSET (t
), copy_tree_body_r
, id
, NULL
);
397 if (TREE_CODE (DECL_CONTEXT (t
)) == QUAL_UNION_TYPE
)
398 walk_tree (&DECL_QUALIFIER (t
), copy_tree_body_r
, id
, NULL
);
404 if (id
->do_not_unshare
)
407 return unshare_expr (*n
);
411 remap_type_1 (tree type
, copy_body_data
*id
)
415 /* We do need a copy. build and register it now. If this is a pointer or
416 reference type, remap the designated type and make a new pointer or
418 if (TREE_CODE (type
) == POINTER_TYPE
)
420 new_tree
= build_pointer_type_for_mode (remap_type (TREE_TYPE (type
), id
),
422 TYPE_REF_CAN_ALIAS_ALL (type
));
423 if (TYPE_ATTRIBUTES (type
) || TYPE_QUALS (type
))
424 new_tree
= build_type_attribute_qual_variant (new_tree
,
425 TYPE_ATTRIBUTES (type
),
427 insert_decl_map (id
, type
, new_tree
);
430 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
432 new_tree
= build_reference_type_for_mode (remap_type (TREE_TYPE (type
), id
),
434 TYPE_REF_CAN_ALIAS_ALL (type
));
435 if (TYPE_ATTRIBUTES (type
) || TYPE_QUALS (type
))
436 new_tree
= build_type_attribute_qual_variant (new_tree
,
437 TYPE_ATTRIBUTES (type
),
439 insert_decl_map (id
, type
, new_tree
);
443 new_tree
= copy_node (type
);
445 insert_decl_map (id
, type
, new_tree
);
447 /* This is a new type, not a copy of an old type. Need to reassociate
448 variants. We can handle everything except the main variant lazily. */
449 t
= TYPE_MAIN_VARIANT (type
);
452 t
= remap_type (t
, id
);
453 TYPE_MAIN_VARIANT (new_tree
) = t
;
454 TYPE_NEXT_VARIANT (new_tree
) = TYPE_NEXT_VARIANT (t
);
455 TYPE_NEXT_VARIANT (t
) = new_tree
;
459 TYPE_MAIN_VARIANT (new_tree
) = new_tree
;
460 TYPE_NEXT_VARIANT (new_tree
) = NULL
;
463 if (TYPE_STUB_DECL (type
))
464 TYPE_STUB_DECL (new_tree
) = remap_decl (TYPE_STUB_DECL (type
), id
);
466 /* Lazily create pointer and reference types. */
467 TYPE_POINTER_TO (new_tree
) = NULL
;
468 TYPE_REFERENCE_TO (new_tree
) = NULL
;
470 /* Copy all types that may contain references to local variables; be sure to
471 preserve sharing in between type and its main variant when possible. */
472 switch (TREE_CODE (new_tree
))
476 case FIXED_POINT_TYPE
:
479 if (TYPE_MAIN_VARIANT (new_tree
) != new_tree
)
481 gcc_checking_assert (TYPE_MIN_VALUE (type
) == TYPE_MIN_VALUE (TYPE_MAIN_VARIANT (type
)));
482 gcc_checking_assert (TYPE_MAX_VALUE (type
) == TYPE_MAX_VALUE (TYPE_MAIN_VARIANT (type
)));
484 TYPE_MIN_VALUE (new_tree
) = TYPE_MIN_VALUE (TYPE_MAIN_VARIANT (new_tree
));
485 TYPE_MAX_VALUE (new_tree
) = TYPE_MAX_VALUE (TYPE_MAIN_VARIANT (new_tree
));
489 t
= TYPE_MIN_VALUE (new_tree
);
490 if (t
&& TREE_CODE (t
) != INTEGER_CST
)
491 walk_tree (&TYPE_MIN_VALUE (new_tree
), copy_tree_body_r
, id
, NULL
);
493 t
= TYPE_MAX_VALUE (new_tree
);
494 if (t
&& TREE_CODE (t
) != INTEGER_CST
)
495 walk_tree (&TYPE_MAX_VALUE (new_tree
), copy_tree_body_r
, id
, NULL
);
500 if (TYPE_MAIN_VARIANT (new_tree
) != new_tree
501 && TREE_TYPE (type
) == TREE_TYPE (TYPE_MAIN_VARIANT (type
)))
502 TREE_TYPE (new_tree
) = TREE_TYPE (TYPE_MAIN_VARIANT (new_tree
));
504 TREE_TYPE (new_tree
) = remap_type (TREE_TYPE (new_tree
), id
);
505 if (TYPE_MAIN_VARIANT (new_tree
) != new_tree
506 && TYPE_ARG_TYPES (type
) == TYPE_ARG_TYPES (TYPE_MAIN_VARIANT (type
)))
507 TYPE_ARG_TYPES (new_tree
) = TYPE_ARG_TYPES (TYPE_MAIN_VARIANT (new_tree
));
509 walk_tree (&TYPE_ARG_TYPES (new_tree
), copy_tree_body_r
, id
, NULL
);
513 if (TYPE_MAIN_VARIANT (new_tree
) != new_tree
514 && TREE_TYPE (type
) == TREE_TYPE (TYPE_MAIN_VARIANT (type
)))
515 TREE_TYPE (new_tree
) = TREE_TYPE (TYPE_MAIN_VARIANT (new_tree
));
517 TREE_TYPE (new_tree
) = remap_type (TREE_TYPE (new_tree
), id
);
519 if (TYPE_MAIN_VARIANT (new_tree
) != new_tree
)
521 gcc_checking_assert (TYPE_DOMAIN (type
) == TYPE_DOMAIN (TYPE_MAIN_VARIANT (type
)));
522 TYPE_DOMAIN (new_tree
) = TYPE_DOMAIN (TYPE_MAIN_VARIANT (new_tree
));
525 TYPE_DOMAIN (new_tree
) = remap_type (TYPE_DOMAIN (new_tree
), id
);
530 case QUAL_UNION_TYPE
:
531 if (TYPE_MAIN_VARIANT (type
) != type
532 && TYPE_FIELDS (type
) == TYPE_FIELDS (TYPE_MAIN_VARIANT (type
)))
533 TYPE_FIELDS (new_tree
) = TYPE_FIELDS (TYPE_MAIN_VARIANT (new_tree
));
538 for (f
= TYPE_FIELDS (new_tree
); f
; f
= DECL_CHAIN (f
))
540 t
= remap_decl (f
, id
);
541 DECL_CONTEXT (t
) = new_tree
;
545 TYPE_FIELDS (new_tree
) = nreverse (nf
);
551 /* Shouldn't have been thought variable sized. */
555 /* All variants of type share the same size, so use the already remaped data. */
556 if (TYPE_MAIN_VARIANT (new_tree
) != new_tree
)
558 tree s
= TYPE_SIZE (type
);
559 tree mvs
= TYPE_SIZE (TYPE_MAIN_VARIANT (type
));
560 tree su
= TYPE_SIZE_UNIT (type
);
561 tree mvsu
= TYPE_SIZE_UNIT (TYPE_MAIN_VARIANT (type
));
562 gcc_checking_assert ((TREE_CODE (s
) == PLACEHOLDER_EXPR
563 && (TREE_CODE (mvs
) == PLACEHOLDER_EXPR
))
565 gcc_checking_assert ((TREE_CODE (su
) == PLACEHOLDER_EXPR
566 && (TREE_CODE (mvsu
) == PLACEHOLDER_EXPR
))
568 TYPE_SIZE (new_tree
) = TYPE_SIZE (TYPE_MAIN_VARIANT (new_tree
));
569 TYPE_SIZE_UNIT (new_tree
) = TYPE_SIZE_UNIT (TYPE_MAIN_VARIANT (new_tree
));
573 walk_tree (&TYPE_SIZE (new_tree
), copy_tree_body_r
, id
, NULL
);
574 walk_tree (&TYPE_SIZE_UNIT (new_tree
), copy_tree_body_r
, id
, NULL
);
581 remap_type (tree type
, copy_body_data
*id
)
589 /* See if we have remapped this type. */
590 node
= id
->decl_map
->get (type
);
594 /* The type only needs remapping if it's variably modified. */
595 if (! variably_modified_type_p (type
, id
->src_fn
))
597 insert_decl_map (id
, type
, type
);
601 id
->remapping_type_depth
++;
602 tmp
= remap_type_1 (type
, id
);
603 id
->remapping_type_depth
--;
608 /* Decide if DECL can be put into BLOCK_NONLOCAL_VARs. */
611 can_be_nonlocal (tree decl
, copy_body_data
*id
)
613 /* We can not duplicate function decls. */
614 if (TREE_CODE (decl
) == FUNCTION_DECL
)
617 /* Local static vars must be non-local or we get multiple declaration
619 if (VAR_P (decl
) && !auto_var_in_fn_p (decl
, id
->src_fn
))
626 remap_decls (tree decls
, vec
<tree
, va_gc
> **nonlocalized_list
,
630 tree new_decls
= NULL_TREE
;
632 /* Remap its variables. */
633 for (old_var
= decls
; old_var
; old_var
= DECL_CHAIN (old_var
))
637 if (can_be_nonlocal (old_var
, id
))
639 /* We need to add this variable to the local decls as otherwise
640 nothing else will do so. */
641 if (VAR_P (old_var
) && ! DECL_EXTERNAL (old_var
) && cfun
)
642 add_local_decl (cfun
, old_var
);
643 if ((!optimize
|| debug_info_level
> DINFO_LEVEL_TERSE
)
644 && !DECL_IGNORED_P (old_var
)
645 && nonlocalized_list
)
646 vec_safe_push (*nonlocalized_list
, old_var
);
650 /* Remap the variable. */
651 new_var
= remap_decl (old_var
, id
);
653 /* If we didn't remap this variable, we can't mess with its
654 TREE_CHAIN. If we remapped this variable to the return slot, it's
655 already declared somewhere else, so don't declare it here. */
657 if (new_var
== id
->retvar
)
661 if ((!optimize
|| debug_info_level
> DINFO_LEVEL_TERSE
)
662 && !DECL_IGNORED_P (old_var
)
663 && nonlocalized_list
)
664 vec_safe_push (*nonlocalized_list
, old_var
);
668 gcc_assert (DECL_P (new_var
));
669 DECL_CHAIN (new_var
) = new_decls
;
672 /* Also copy value-expressions. */
673 if (VAR_P (new_var
) && DECL_HAS_VALUE_EXPR_P (new_var
))
675 tree tem
= DECL_VALUE_EXPR (new_var
);
676 bool old_regimplify
= id
->regimplify
;
677 id
->remapping_type_depth
++;
678 walk_tree (&tem
, copy_tree_body_r
, id
, NULL
);
679 id
->remapping_type_depth
--;
680 id
->regimplify
= old_regimplify
;
681 SET_DECL_VALUE_EXPR (new_var
, tem
);
686 return nreverse (new_decls
);
689 /* Copy the BLOCK to contain remapped versions of the variables
690 therein. And hook the new block into the block-tree. */
693 remap_block (tree
*block
, copy_body_data
*id
)
698 /* Make the new block. */
700 new_block
= make_node (BLOCK
);
701 TREE_USED (new_block
) = TREE_USED (old_block
);
702 BLOCK_ABSTRACT_ORIGIN (new_block
) = old_block
;
703 BLOCK_SOURCE_LOCATION (new_block
) = BLOCK_SOURCE_LOCATION (old_block
);
704 BLOCK_NONLOCALIZED_VARS (new_block
)
705 = vec_safe_copy (BLOCK_NONLOCALIZED_VARS (old_block
));
708 /* Remap its variables. */
709 BLOCK_VARS (new_block
) = remap_decls (BLOCK_VARS (old_block
),
710 &BLOCK_NONLOCALIZED_VARS (new_block
),
713 if (id
->transform_lang_insert_block
)
714 id
->transform_lang_insert_block (new_block
);
716 /* Remember the remapped block. */
717 insert_decl_map (id
, old_block
, new_block
);
720 /* Copy the whole block tree and root it in id->block. */
722 remap_blocks (tree block
, copy_body_data
*id
)
725 tree new_tree
= block
;
730 remap_block (&new_tree
, id
);
731 gcc_assert (new_tree
!= block
);
732 for (t
= BLOCK_SUBBLOCKS (block
); t
; t
= BLOCK_CHAIN (t
))
733 prepend_lexical_block (new_tree
, remap_blocks (t
, id
));
734 /* Blocks are in arbitrary order, but make things slightly prettier and do
735 not swap order when producing a copy. */
736 BLOCK_SUBBLOCKS (new_tree
) = blocks_nreverse (BLOCK_SUBBLOCKS (new_tree
));
740 /* Remap the block tree rooted at BLOCK to nothing. */
742 remap_blocks_to_null (tree block
, copy_body_data
*id
)
745 insert_decl_map (id
, block
, NULL_TREE
);
746 for (t
= BLOCK_SUBBLOCKS (block
); t
; t
= BLOCK_CHAIN (t
))
747 remap_blocks_to_null (t
, id
);
751 copy_statement_list (tree
*tp
)
753 tree_stmt_iterator oi
, ni
;
756 new_tree
= alloc_stmt_list ();
757 ni
= tsi_start (new_tree
);
758 oi
= tsi_start (*tp
);
759 TREE_TYPE (new_tree
) = TREE_TYPE (*tp
);
762 for (; !tsi_end_p (oi
); tsi_next (&oi
))
764 tree stmt
= tsi_stmt (oi
);
765 if (TREE_CODE (stmt
) == STATEMENT_LIST
)
766 /* This copy is not redundant; tsi_link_after will smash this
767 STATEMENT_LIST into the end of the one we're building, and we
768 don't want to do that with the original. */
769 copy_statement_list (&stmt
);
770 tsi_link_after (&ni
, stmt
, TSI_CONTINUE_LINKING
);
775 copy_bind_expr (tree
*tp
, int *walk_subtrees
, copy_body_data
*id
)
777 tree block
= BIND_EXPR_BLOCK (*tp
);
778 /* Copy (and replace) the statement. */
779 copy_tree_r (tp
, walk_subtrees
, NULL
);
782 remap_block (&block
, id
);
783 BIND_EXPR_BLOCK (*tp
) = block
;
786 if (BIND_EXPR_VARS (*tp
))
787 /* This will remap a lot of the same decls again, but this should be
789 BIND_EXPR_VARS (*tp
) = remap_decls (BIND_EXPR_VARS (*tp
), NULL
, id
);
793 /* Create a new gimple_seq by remapping all the statements in BODY
794 using the inlining information in ID. */
797 remap_gimple_seq (gimple_seq body
, copy_body_data
*id
)
799 gimple_stmt_iterator si
;
800 gimple_seq new_body
= NULL
;
802 for (si
= gsi_start (body
); !gsi_end_p (si
); gsi_next (&si
))
804 gimple_seq new_stmts
= remap_gimple_stmt (gsi_stmt (si
), id
);
805 gimple_seq_add_seq (&new_body
, new_stmts
);
812 /* Copy a GIMPLE_BIND statement STMT, remapping all the symbols in its
813 block using the mapping information in ID. */
816 copy_gimple_bind (gbind
*stmt
, copy_body_data
*id
)
819 tree new_block
, new_vars
;
820 gimple_seq body
, new_body
;
822 /* Copy the statement. Note that we purposely don't use copy_stmt
823 here because we need to remap statements as we copy. */
824 body
= gimple_bind_body (stmt
);
825 new_body
= remap_gimple_seq (body
, id
);
827 new_block
= gimple_bind_block (stmt
);
829 remap_block (&new_block
, id
);
831 /* This will remap a lot of the same decls again, but this should be
833 new_vars
= gimple_bind_vars (stmt
);
835 new_vars
= remap_decls (new_vars
, NULL
, id
);
837 new_bind
= gimple_build_bind (new_vars
, new_body
, new_block
);
842 /* Return true if DECL is a parameter or a SSA_NAME for a parameter. */
847 if (TREE_CODE (decl
) == SSA_NAME
)
849 decl
= SSA_NAME_VAR (decl
);
854 return (TREE_CODE (decl
) == PARM_DECL
);
857 /* Remap the dependence CLIQUE from the source to the destination function
858 as specified in ID. */
860 static unsigned short
861 remap_dependence_clique (copy_body_data
*id
, unsigned short clique
)
863 if (clique
== 0 || processing_debug_stmt
)
865 if (!id
->dependence_map
)
866 id
->dependence_map
= new hash_map
<dependence_hash
, unsigned short>;
868 unsigned short &newc
= id
->dependence_map
->get_or_insert (clique
, &existed
);
870 newc
= ++cfun
->last_clique
;
874 /* Remap the GIMPLE operand pointed to by *TP. DATA is really a
875 'struct walk_stmt_info *'. DATA->INFO is a 'copy_body_data *'.
876 WALK_SUBTREES is used to indicate walk_gimple_op whether to keep
877 recursing into the children nodes of *TP. */
880 remap_gimple_op_r (tree
*tp
, int *walk_subtrees
, void *data
)
882 struct walk_stmt_info
*wi_p
= (struct walk_stmt_info
*) data
;
883 copy_body_data
*id
= (copy_body_data
*) wi_p
->info
;
884 tree fn
= id
->src_fn
;
886 /* For recursive invocations this is no longer the LHS itself. */
887 bool is_lhs
= wi_p
->is_lhs
;
888 wi_p
->is_lhs
= false;
890 if (TREE_CODE (*tp
) == SSA_NAME
)
892 *tp
= remap_ssa_name (*tp
, id
);
895 SSA_NAME_DEF_STMT (*tp
) = wi_p
->stmt
;
898 else if (auto_var_in_fn_p (*tp
, fn
))
900 /* Local variables and labels need to be replaced by equivalent
901 variables. We don't want to copy static variables; there's
902 only one of those, no matter how many times we inline the
903 containing function. Similarly for globals from an outer
907 /* Remap the declaration. */
908 new_decl
= remap_decl (*tp
, id
);
909 gcc_assert (new_decl
);
910 /* Replace this variable with the copy. */
911 STRIP_TYPE_NOPS (new_decl
);
912 /* ??? The C++ frontend uses void * pointer zero to initialize
913 any other type. This confuses the middle-end type verification.
914 As cloned bodies do not go through gimplification again the fixup
915 there doesn't trigger. */
916 if (TREE_CODE (new_decl
) == INTEGER_CST
917 && !useless_type_conversion_p (TREE_TYPE (*tp
), TREE_TYPE (new_decl
)))
918 new_decl
= fold_convert (TREE_TYPE (*tp
), new_decl
);
922 else if (TREE_CODE (*tp
) == STATEMENT_LIST
)
924 else if (TREE_CODE (*tp
) == SAVE_EXPR
)
926 else if (TREE_CODE (*tp
) == LABEL_DECL
927 && (!DECL_CONTEXT (*tp
)
928 || decl_function_context (*tp
) == id
->src_fn
))
929 /* These may need to be remapped for EH handling. */
930 *tp
= remap_decl (*tp
, id
);
931 else if (TREE_CODE (*tp
) == FIELD_DECL
)
933 /* If the enclosing record type is variably_modified_type_p, the field
934 has already been remapped. Otherwise, it need not be. */
935 tree
*n
= id
->decl_map
->get (*tp
);
940 else if (TYPE_P (*tp
))
941 /* Types may need remapping as well. */
942 *tp
= remap_type (*tp
, id
);
943 else if (CONSTANT_CLASS_P (*tp
))
945 /* If this is a constant, we have to copy the node iff the type
946 will be remapped. copy_tree_r will not copy a constant. */
947 tree new_type
= remap_type (TREE_TYPE (*tp
), id
);
949 if (new_type
== TREE_TYPE (*tp
))
952 else if (TREE_CODE (*tp
) == INTEGER_CST
)
953 *tp
= wide_int_to_tree (new_type
, wi::to_wide (*tp
));
956 *tp
= copy_node (*tp
);
957 TREE_TYPE (*tp
) = new_type
;
962 /* Otherwise, just copy the node. Note that copy_tree_r already
963 knows not to copy VAR_DECLs, etc., so this is safe. */
965 if (TREE_CODE (*tp
) == MEM_REF
)
967 /* We need to re-canonicalize MEM_REFs from inline substitutions
968 that can happen when a pointer argument is an ADDR_EXPR.
969 Recurse here manually to allow that. */
970 tree ptr
= TREE_OPERAND (*tp
, 0);
971 tree type
= remap_type (TREE_TYPE (*tp
), id
);
973 walk_tree (&ptr
, remap_gimple_op_r
, data
, NULL
);
974 *tp
= fold_build2 (MEM_REF
, type
, ptr
, TREE_OPERAND (*tp
, 1));
975 TREE_THIS_VOLATILE (*tp
) = TREE_THIS_VOLATILE (old
);
976 TREE_SIDE_EFFECTS (*tp
) = TREE_SIDE_EFFECTS (old
);
977 TREE_NO_WARNING (*tp
) = TREE_NO_WARNING (old
);
978 if (MR_DEPENDENCE_CLIQUE (old
) != 0)
980 MR_DEPENDENCE_CLIQUE (*tp
)
981 = remap_dependence_clique (id
, MR_DEPENDENCE_CLIQUE (old
));
982 MR_DEPENDENCE_BASE (*tp
) = MR_DEPENDENCE_BASE (old
);
984 /* We cannot propagate the TREE_THIS_NOTRAP flag if we have
985 remapped a parameter as the property might be valid only
986 for the parameter itself. */
987 if (TREE_THIS_NOTRAP (old
)
988 && (!is_parm (TREE_OPERAND (old
, 0))
989 || (!id
->transform_parameter
&& is_parm (ptr
))))
990 TREE_THIS_NOTRAP (*tp
) = 1;
991 REF_REVERSE_STORAGE_ORDER (*tp
) = REF_REVERSE_STORAGE_ORDER (old
);
996 /* Here is the "usual case". Copy this tree node, and then
997 tweak some special cases. */
998 copy_tree_r (tp
, walk_subtrees
, NULL
);
1000 if (TREE_CODE (*tp
) != OMP_CLAUSE
)
1001 TREE_TYPE (*tp
) = remap_type (TREE_TYPE (*tp
), id
);
1003 if (TREE_CODE (*tp
) == TARGET_EXPR
&& TREE_OPERAND (*tp
, 3))
1005 /* The copied TARGET_EXPR has never been expanded, even if the
1006 original node was expanded already. */
1007 TREE_OPERAND (*tp
, 1) = TREE_OPERAND (*tp
, 3);
1008 TREE_OPERAND (*tp
, 3) = NULL_TREE
;
1010 else if (TREE_CODE (*tp
) == ADDR_EXPR
)
1012 /* Variable substitution need not be simple. In particular,
1013 the MEM_REF substitution above. Make sure that
1014 TREE_CONSTANT and friends are up-to-date. */
1015 int invariant
= is_gimple_min_invariant (*tp
);
1016 walk_tree (&TREE_OPERAND (*tp
, 0), remap_gimple_op_r
, data
, NULL
);
1017 recompute_tree_invariant_for_addr_expr (*tp
);
1019 /* If this used to be invariant, but is not any longer,
1020 then regimplification is probably needed. */
1021 if (invariant
&& !is_gimple_min_invariant (*tp
))
1022 id
->regimplify
= true;
1028 /* Update the TREE_BLOCK for the cloned expr. */
1031 tree new_block
= id
->remapping_type_depth
== 0 ? id
->block
: NULL
;
1032 tree old_block
= TREE_BLOCK (*tp
);
1036 n
= id
->decl_map
->get (TREE_BLOCK (*tp
));
1040 TREE_SET_BLOCK (*tp
, new_block
);
1043 /* Keep iterating. */
1048 /* Called from copy_body_id via walk_tree. DATA is really a
1049 `copy_body_data *'. */
1052 copy_tree_body_r (tree
*tp
, int *walk_subtrees
, void *data
)
1054 copy_body_data
*id
= (copy_body_data
*) data
;
1055 tree fn
= id
->src_fn
;
1058 /* Begin by recognizing trees that we'll completely rewrite for the
1059 inlining context. Our output for these trees is completely
1060 different from out input (e.g. RETURN_EXPR is deleted, and morphs
1061 into an edge). Further down, we'll handle trees that get
1062 duplicated and/or tweaked. */
1064 /* When requested, RETURN_EXPRs should be transformed to just the
1065 contained MODIFY_EXPR. The branch semantics of the return will
1066 be handled elsewhere by manipulating the CFG rather than a statement. */
1067 if (TREE_CODE (*tp
) == RETURN_EXPR
&& id
->transform_return_to_modify
)
1069 tree assignment
= TREE_OPERAND (*tp
, 0);
1071 /* If we're returning something, just turn that into an
1072 assignment into the equivalent of the original RESULT_DECL.
1073 If the "assignment" is just the result decl, the result
1074 decl has already been set (e.g. a recent "foo (&result_decl,
1075 ...)"); just toss the entire RETURN_EXPR. */
1076 if (assignment
&& TREE_CODE (assignment
) == MODIFY_EXPR
)
1078 /* Replace the RETURN_EXPR with (a copy of) the
1079 MODIFY_EXPR hanging underneath. */
1080 *tp
= copy_node (assignment
);
1082 else /* Else the RETURN_EXPR returns no value. */
1085 return (tree
) (void *)1;
1088 else if (TREE_CODE (*tp
) == SSA_NAME
)
1090 *tp
= remap_ssa_name (*tp
, id
);
1095 /* Local variables and labels need to be replaced by equivalent
1096 variables. We don't want to copy static variables; there's only
1097 one of those, no matter how many times we inline the containing
1098 function. Similarly for globals from an outer function. */
1099 else if (auto_var_in_fn_p (*tp
, fn
))
1103 /* Remap the declaration. */
1104 new_decl
= remap_decl (*tp
, id
);
1105 gcc_assert (new_decl
);
1106 /* Replace this variable with the copy. */
1107 STRIP_TYPE_NOPS (new_decl
);
1111 else if (TREE_CODE (*tp
) == STATEMENT_LIST
)
1112 copy_statement_list (tp
);
1113 else if (TREE_CODE (*tp
) == SAVE_EXPR
1114 || TREE_CODE (*tp
) == TARGET_EXPR
)
1115 remap_save_expr (tp
, id
->decl_map
, walk_subtrees
);
1116 else if (TREE_CODE (*tp
) == LABEL_DECL
1117 && (! DECL_CONTEXT (*tp
)
1118 || decl_function_context (*tp
) == id
->src_fn
))
1119 /* These may need to be remapped for EH handling. */
1120 *tp
= remap_decl (*tp
, id
);
1121 else if (TREE_CODE (*tp
) == BIND_EXPR
)
1122 copy_bind_expr (tp
, walk_subtrees
, id
);
1123 /* Types may need remapping as well. */
1124 else if (TYPE_P (*tp
))
1125 *tp
= remap_type (*tp
, id
);
1127 /* If this is a constant, we have to copy the node iff the type will be
1128 remapped. copy_tree_r will not copy a constant. */
1129 else if (CONSTANT_CLASS_P (*tp
))
1131 tree new_type
= remap_type (TREE_TYPE (*tp
), id
);
1133 if (new_type
== TREE_TYPE (*tp
))
1136 else if (TREE_CODE (*tp
) == INTEGER_CST
)
1137 *tp
= wide_int_to_tree (new_type
, wi::to_wide (*tp
));
1140 *tp
= copy_node (*tp
);
1141 TREE_TYPE (*tp
) = new_type
;
1145 /* Otherwise, just copy the node. Note that copy_tree_r already
1146 knows not to copy VAR_DECLs, etc., so this is safe. */
1149 /* Here we handle trees that are not completely rewritten.
1150 First we detect some inlining-induced bogosities for
1152 if (TREE_CODE (*tp
) == MODIFY_EXPR
1153 && TREE_OPERAND (*tp
, 0) == TREE_OPERAND (*tp
, 1)
1154 && (auto_var_in_fn_p (TREE_OPERAND (*tp
, 0), fn
)))
1156 /* Some assignments VAR = VAR; don't generate any rtl code
1157 and thus don't count as variable modification. Avoid
1158 keeping bogosities like 0 = 0. */
1159 tree decl
= TREE_OPERAND (*tp
, 0), value
;
1162 n
= id
->decl_map
->get (decl
);
1166 STRIP_TYPE_NOPS (value
);
1167 if (TREE_CONSTANT (value
) || TREE_READONLY (value
))
1169 *tp
= build_empty_stmt (EXPR_LOCATION (*tp
));
1170 return copy_tree_body_r (tp
, walk_subtrees
, data
);
1174 else if (TREE_CODE (*tp
) == INDIRECT_REF
)
1176 /* Get rid of *& from inline substitutions that can happen when a
1177 pointer argument is an ADDR_EXPR. */
1178 tree decl
= TREE_OPERAND (*tp
, 0);
1179 tree
*n
= id
->decl_map
->get (decl
);
1182 /* If we happen to get an ADDR_EXPR in n->value, strip
1183 it manually here as we'll eventually get ADDR_EXPRs
1184 which lie about their types pointed to. In this case
1185 build_fold_indirect_ref wouldn't strip the INDIRECT_REF,
1186 but we absolutely rely on that. As fold_indirect_ref
1187 does other useful transformations, try that first, though. */
1188 tree type
= TREE_TYPE (*tp
);
1189 tree ptr
= id
->do_not_unshare
? *n
: unshare_expr (*n
);
1191 *tp
= gimple_fold_indirect_ref (ptr
);
1194 type
= remap_type (type
, id
);
1195 if (TREE_CODE (ptr
) == ADDR_EXPR
)
1198 = fold_indirect_ref_1 (EXPR_LOCATION (ptr
), type
, ptr
);
1199 /* ??? We should either assert here or build
1200 a VIEW_CONVERT_EXPR instead of blindly leaking
1201 incompatible types to our IL. */
1203 *tp
= TREE_OPERAND (ptr
, 0);
1207 *tp
= build1 (INDIRECT_REF
, type
, ptr
);
1208 TREE_THIS_VOLATILE (*tp
) = TREE_THIS_VOLATILE (old
);
1209 TREE_SIDE_EFFECTS (*tp
) = TREE_SIDE_EFFECTS (old
);
1210 TREE_READONLY (*tp
) = TREE_READONLY (old
);
1211 /* We cannot propagate the TREE_THIS_NOTRAP flag if we
1212 have remapped a parameter as the property might be
1213 valid only for the parameter itself. */
1214 if (TREE_THIS_NOTRAP (old
)
1215 && (!is_parm (TREE_OPERAND (old
, 0))
1216 || (!id
->transform_parameter
&& is_parm (ptr
))))
1217 TREE_THIS_NOTRAP (*tp
) = 1;
1224 else if (TREE_CODE (*tp
) == MEM_REF
)
1226 /* We need to re-canonicalize MEM_REFs from inline substitutions
1227 that can happen when a pointer argument is an ADDR_EXPR.
1228 Recurse here manually to allow that. */
1229 tree ptr
= TREE_OPERAND (*tp
, 0);
1230 tree type
= remap_type (TREE_TYPE (*tp
), id
);
1232 walk_tree (&ptr
, copy_tree_body_r
, data
, NULL
);
1233 *tp
= fold_build2 (MEM_REF
, type
, ptr
, TREE_OPERAND (*tp
, 1));
1234 TREE_THIS_VOLATILE (*tp
) = TREE_THIS_VOLATILE (old
);
1235 TREE_SIDE_EFFECTS (*tp
) = TREE_SIDE_EFFECTS (old
);
1236 TREE_NO_WARNING (*tp
) = TREE_NO_WARNING (old
);
1237 if (MR_DEPENDENCE_CLIQUE (old
) != 0)
1239 MR_DEPENDENCE_CLIQUE (*tp
)
1240 = remap_dependence_clique (id
, MR_DEPENDENCE_CLIQUE (old
));
1241 MR_DEPENDENCE_BASE (*tp
) = MR_DEPENDENCE_BASE (old
);
1243 /* We cannot propagate the TREE_THIS_NOTRAP flag if we have
1244 remapped a parameter as the property might be valid only
1245 for the parameter itself. */
1246 if (TREE_THIS_NOTRAP (old
)
1247 && (!is_parm (TREE_OPERAND (old
, 0))
1248 || (!id
->transform_parameter
&& is_parm (ptr
))))
1249 TREE_THIS_NOTRAP (*tp
) = 1;
1250 REF_REVERSE_STORAGE_ORDER (*tp
) = REF_REVERSE_STORAGE_ORDER (old
);
1255 /* Here is the "usual case". Copy this tree node, and then
1256 tweak some special cases. */
1257 copy_tree_r (tp
, walk_subtrees
, NULL
);
1259 /* If EXPR has block defined, map it to newly constructed block.
1260 When inlining we want EXPRs without block appear in the block
1261 of function call if we are not remapping a type. */
1264 new_block
= id
->remapping_type_depth
== 0 ? id
->block
: NULL
;
1265 if (TREE_BLOCK (*tp
))
1268 n
= id
->decl_map
->get (TREE_BLOCK (*tp
));
1272 TREE_SET_BLOCK (*tp
, new_block
);
1275 if (TREE_CODE (*tp
) != OMP_CLAUSE
)
1276 TREE_TYPE (*tp
) = remap_type (TREE_TYPE (*tp
), id
);
1278 /* The copied TARGET_EXPR has never been expanded, even if the
1279 original node was expanded already. */
1280 if (TREE_CODE (*tp
) == TARGET_EXPR
&& TREE_OPERAND (*tp
, 3))
1282 TREE_OPERAND (*tp
, 1) = TREE_OPERAND (*tp
, 3);
1283 TREE_OPERAND (*tp
, 3) = NULL_TREE
;
1286 /* Variable substitution need not be simple. In particular, the
1287 INDIRECT_REF substitution above. Make sure that TREE_CONSTANT
1288 and friends are up-to-date. */
1289 else if (TREE_CODE (*tp
) == ADDR_EXPR
)
1291 int invariant
= is_gimple_min_invariant (*tp
);
1292 walk_tree (&TREE_OPERAND (*tp
, 0), copy_tree_body_r
, id
, NULL
);
1294 /* Handle the case where we substituted an INDIRECT_REF
1295 into the operand of the ADDR_EXPR. */
1296 if (TREE_CODE (TREE_OPERAND (*tp
, 0)) == INDIRECT_REF
)
1298 tree t
= TREE_OPERAND (TREE_OPERAND (*tp
, 0), 0);
1299 if (TREE_TYPE (t
) != TREE_TYPE (*tp
))
1300 t
= fold_convert (remap_type (TREE_TYPE (*tp
), id
), t
);
1304 recompute_tree_invariant_for_addr_expr (*tp
);
1306 /* If this used to be invariant, but is not any longer,
1307 then regimplification is probably needed. */
1308 if (invariant
&& !is_gimple_min_invariant (*tp
))
1309 id
->regimplify
= true;
1315 /* Keep iterating. */
1319 /* Helper for remap_gimple_stmt. Given an EH region number for the
1320 source function, map that to the duplicate EH region number in
1321 the destination function. */
1324 remap_eh_region_nr (int old_nr
, copy_body_data
*id
)
1326 eh_region old_r
, new_r
;
1328 old_r
= get_eh_region_from_number_fn (id
->src_cfun
, old_nr
);
1329 new_r
= static_cast<eh_region
> (*id
->eh_map
->get (old_r
));
1331 return new_r
->index
;
1334 /* Similar, but operate on INTEGER_CSTs. */
1337 remap_eh_region_tree_nr (tree old_t_nr
, copy_body_data
*id
)
1341 old_nr
= tree_to_shwi (old_t_nr
);
1342 new_nr
= remap_eh_region_nr (old_nr
, id
);
1344 return build_int_cst (integer_type_node
, new_nr
);
1347 /* Helper for copy_bb. Remap statement STMT using the inlining
1348 information in ID. Return the new statement copy. */
1351 remap_gimple_stmt (gimple
*stmt
, copy_body_data
*id
)
1353 gimple
*copy
= NULL
;
1354 struct walk_stmt_info wi
;
1355 bool skip_first
= false;
1356 gimple_seq stmts
= NULL
;
1358 if (is_gimple_debug (stmt
)
1359 && (gimple_debug_nonbind_marker_p (stmt
)
1360 ? !DECL_STRUCT_FUNCTION (id
->dst_fn
)->debug_nonbind_markers
1361 : !opt_for_fn (id
->dst_fn
, flag_var_tracking_assignments
)))
1364 /* Begin by recognizing trees that we'll completely rewrite for the
1365 inlining context. Our output for these trees is completely
1366 different from out input (e.g. RETURN_EXPR is deleted, and morphs
1367 into an edge). Further down, we'll handle trees that get
1368 duplicated and/or tweaked. */
1370 /* When requested, GIMPLE_RETURNs should be transformed to just the
1371 contained GIMPLE_ASSIGN. The branch semantics of the return will
1372 be handled elsewhere by manipulating the CFG rather than the
1374 if (gimple_code (stmt
) == GIMPLE_RETURN
&& id
->transform_return_to_modify
)
1376 tree retval
= gimple_return_retval (as_a
<greturn
*> (stmt
));
1377 tree retbnd
= gimple_return_retbnd (stmt
);
1378 tree bndslot
= id
->retbnd
;
1380 if (retbnd
&& bndslot
)
1382 gimple
*bndcopy
= gimple_build_assign (bndslot
, retbnd
);
1383 memset (&wi
, 0, sizeof (wi
));
1385 walk_gimple_op (bndcopy
, remap_gimple_op_r
, &wi
);
1386 gimple_seq_add_stmt (&stmts
, bndcopy
);
1389 /* If we're returning something, just turn that into an
1390 assignment into the equivalent of the original RESULT_DECL.
1391 If RETVAL is just the result decl, the result decl has
1392 already been set (e.g. a recent "foo (&result_decl, ...)");
1393 just toss the entire GIMPLE_RETURN. */
1395 && (TREE_CODE (retval
) != RESULT_DECL
1396 && (TREE_CODE (retval
) != SSA_NAME
1397 || ! SSA_NAME_VAR (retval
)
1398 || TREE_CODE (SSA_NAME_VAR (retval
)) != RESULT_DECL
)))
1400 copy
= gimple_build_assign (id
->do_not_unshare
1401 ? id
->retvar
: unshare_expr (id
->retvar
),
1403 /* id->retvar is already substituted. Skip it on later remapping. */
1409 else if (gimple_has_substatements (stmt
))
1413 /* When cloning bodies from the C++ front end, we will be handed bodies
1414 in High GIMPLE form. Handle here all the High GIMPLE statements that
1415 have embedded statements. */
1416 switch (gimple_code (stmt
))
1419 copy
= copy_gimple_bind (as_a
<gbind
*> (stmt
), id
);
1424 gcatch
*catch_stmt
= as_a
<gcatch
*> (stmt
);
1425 s1
= remap_gimple_seq (gimple_catch_handler (catch_stmt
), id
);
1426 copy
= gimple_build_catch (gimple_catch_types (catch_stmt
), s1
);
1430 case GIMPLE_EH_FILTER
:
1431 s1
= remap_gimple_seq (gimple_eh_filter_failure (stmt
), id
);
1432 copy
= gimple_build_eh_filter (gimple_eh_filter_types (stmt
), s1
);
1436 s1
= remap_gimple_seq (gimple_try_eval (stmt
), id
);
1437 s2
= remap_gimple_seq (gimple_try_cleanup (stmt
), id
);
1438 copy
= gimple_build_try (s1
, s2
, gimple_try_kind (stmt
));
1441 case GIMPLE_WITH_CLEANUP_EXPR
:
1442 s1
= remap_gimple_seq (gimple_wce_cleanup (stmt
), id
);
1443 copy
= gimple_build_wce (s1
);
1446 case GIMPLE_OMP_PARALLEL
:
1448 gomp_parallel
*omp_par_stmt
= as_a
<gomp_parallel
*> (stmt
);
1449 s1
= remap_gimple_seq (gimple_omp_body (omp_par_stmt
), id
);
1450 copy
= gimple_build_omp_parallel
1452 gimple_omp_parallel_clauses (omp_par_stmt
),
1453 gimple_omp_parallel_child_fn (omp_par_stmt
),
1454 gimple_omp_parallel_data_arg (omp_par_stmt
));
1458 case GIMPLE_OMP_TASK
:
1459 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1460 copy
= gimple_build_omp_task
1462 gimple_omp_task_clauses (stmt
),
1463 gimple_omp_task_child_fn (stmt
),
1464 gimple_omp_task_data_arg (stmt
),
1465 gimple_omp_task_copy_fn (stmt
),
1466 gimple_omp_task_arg_size (stmt
),
1467 gimple_omp_task_arg_align (stmt
));
1470 case GIMPLE_OMP_FOR
:
1471 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1472 s2
= remap_gimple_seq (gimple_omp_for_pre_body (stmt
), id
);
1473 copy
= gimple_build_omp_for (s1
, gimple_omp_for_kind (stmt
),
1474 gimple_omp_for_clauses (stmt
),
1475 gimple_omp_for_collapse (stmt
), s2
);
1478 for (i
= 0; i
< gimple_omp_for_collapse (stmt
); i
++)
1480 gimple_omp_for_set_index (copy
, i
,
1481 gimple_omp_for_index (stmt
, i
));
1482 gimple_omp_for_set_initial (copy
, i
,
1483 gimple_omp_for_initial (stmt
, i
));
1484 gimple_omp_for_set_final (copy
, i
,
1485 gimple_omp_for_final (stmt
, i
));
1486 gimple_omp_for_set_incr (copy
, i
,
1487 gimple_omp_for_incr (stmt
, i
));
1488 gimple_omp_for_set_cond (copy
, i
,
1489 gimple_omp_for_cond (stmt
, i
));
1494 case GIMPLE_OMP_MASTER
:
1495 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1496 copy
= gimple_build_omp_master (s1
);
1499 case GIMPLE_OMP_TASKGROUP
:
1500 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1501 copy
= gimple_build_omp_taskgroup (s1
);
1504 case GIMPLE_OMP_ORDERED
:
1505 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1506 copy
= gimple_build_omp_ordered
1508 gimple_omp_ordered_clauses (as_a
<gomp_ordered
*> (stmt
)));
1511 case GIMPLE_OMP_SECTION
:
1512 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1513 copy
= gimple_build_omp_section (s1
);
1516 case GIMPLE_OMP_SECTIONS
:
1517 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1518 copy
= gimple_build_omp_sections
1519 (s1
, gimple_omp_sections_clauses (stmt
));
1522 case GIMPLE_OMP_SINGLE
:
1523 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1524 copy
= gimple_build_omp_single
1525 (s1
, gimple_omp_single_clauses (stmt
));
1528 case GIMPLE_OMP_TARGET
:
1529 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1530 copy
= gimple_build_omp_target
1531 (s1
, gimple_omp_target_kind (stmt
),
1532 gimple_omp_target_clauses (stmt
));
1535 case GIMPLE_OMP_TEAMS
:
1536 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1537 copy
= gimple_build_omp_teams
1538 (s1
, gimple_omp_teams_clauses (stmt
));
1541 case GIMPLE_OMP_CRITICAL
:
1542 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1543 copy
= gimple_build_omp_critical (s1
,
1544 gimple_omp_critical_name
1545 (as_a
<gomp_critical
*> (stmt
)),
1546 gimple_omp_critical_clauses
1547 (as_a
<gomp_critical
*> (stmt
)));
1550 case GIMPLE_TRANSACTION
:
1552 gtransaction
*old_trans_stmt
= as_a
<gtransaction
*> (stmt
);
1553 gtransaction
*new_trans_stmt
;
1554 s1
= remap_gimple_seq (gimple_transaction_body (old_trans_stmt
),
1556 copy
= new_trans_stmt
= gimple_build_transaction (s1
);
1557 gimple_transaction_set_subcode (new_trans_stmt
,
1558 gimple_transaction_subcode (old_trans_stmt
));
1559 gimple_transaction_set_label_norm (new_trans_stmt
,
1560 gimple_transaction_label_norm (old_trans_stmt
));
1561 gimple_transaction_set_label_uninst (new_trans_stmt
,
1562 gimple_transaction_label_uninst (old_trans_stmt
));
1563 gimple_transaction_set_label_over (new_trans_stmt
,
1564 gimple_transaction_label_over (old_trans_stmt
));
1574 if (gimple_assign_copy_p (stmt
)
1575 && gimple_assign_lhs (stmt
) == gimple_assign_rhs1 (stmt
)
1576 && auto_var_in_fn_p (gimple_assign_lhs (stmt
), id
->src_fn
))
1578 /* Here we handle statements that are not completely rewritten.
1579 First we detect some inlining-induced bogosities for
1582 /* Some assignments VAR = VAR; don't generate any rtl code
1583 and thus don't count as variable modification. Avoid
1584 keeping bogosities like 0 = 0. */
1585 tree decl
= gimple_assign_lhs (stmt
), value
;
1588 n
= id
->decl_map
->get (decl
);
1592 STRIP_TYPE_NOPS (value
);
1593 if (TREE_CONSTANT (value
) || TREE_READONLY (value
))
1598 /* For *ptr_N ={v} {CLOBBER}, if ptr_N is SSA_NAME defined
1599 in a block that we aren't copying during tree_function_versioning,
1600 just drop the clobber stmt. */
1601 if (id
->blocks_to_copy
&& gimple_clobber_p (stmt
))
1603 tree lhs
= gimple_assign_lhs (stmt
);
1604 if (TREE_CODE (lhs
) == MEM_REF
1605 && TREE_CODE (TREE_OPERAND (lhs
, 0)) == SSA_NAME
)
1607 gimple
*def_stmt
= SSA_NAME_DEF_STMT (TREE_OPERAND (lhs
, 0));
1608 if (gimple_bb (def_stmt
)
1609 && !bitmap_bit_p (id
->blocks_to_copy
,
1610 gimple_bb (def_stmt
)->index
))
1615 if (gimple_debug_bind_p (stmt
))
1618 = gimple_build_debug_bind (gimple_debug_bind_get_var (stmt
),
1619 gimple_debug_bind_get_value (stmt
),
1621 id
->debug_stmts
.safe_push (copy
);
1622 gimple_seq_add_stmt (&stmts
, copy
);
1625 if (gimple_debug_source_bind_p (stmt
))
1627 gdebug
*copy
= gimple_build_debug_source_bind
1628 (gimple_debug_source_bind_get_var (stmt
),
1629 gimple_debug_source_bind_get_value (stmt
),
1631 id
->debug_stmts
.safe_push (copy
);
1632 gimple_seq_add_stmt (&stmts
, copy
);
1635 if (gimple_debug_nonbind_marker_p (stmt
))
1637 /* If the inlined function has too many debug markers,
1639 if (id
->src_cfun
->debug_marker_count
1640 > PARAM_VALUE (PARAM_MAX_DEBUG_MARKER_COUNT
))
1643 gdebug
*copy
= as_a
<gdebug
*> (gimple_copy (stmt
));
1644 id
->debug_stmts
.safe_push (copy
);
1645 gimple_seq_add_stmt (&stmts
, copy
);
1648 gcc_checking_assert (!is_gimple_debug (stmt
));
1650 /* Create a new deep copy of the statement. */
1651 copy
= gimple_copy (stmt
);
1653 /* Clear flags that need revisiting. */
1654 if (gcall
*call_stmt
= dyn_cast
<gcall
*> (copy
))
1656 if (gimple_call_tail_p (call_stmt
))
1657 gimple_call_set_tail (call_stmt
, false);
1658 if (gimple_call_from_thunk_p (call_stmt
))
1659 gimple_call_set_from_thunk (call_stmt
, false);
1660 if (gimple_call_internal_p (call_stmt
))
1661 switch (gimple_call_internal_fn (call_stmt
))
1663 case IFN_GOMP_SIMD_LANE
:
1664 case IFN_GOMP_SIMD_VF
:
1665 case IFN_GOMP_SIMD_LAST_LANE
:
1666 case IFN_GOMP_SIMD_ORDERED_START
:
1667 case IFN_GOMP_SIMD_ORDERED_END
:
1668 DECL_STRUCT_FUNCTION (id
->dst_fn
)->has_simduid_loops
= true;
1675 /* Remap the region numbers for __builtin_eh_{pointer,filter},
1676 RESX and EH_DISPATCH. */
1678 switch (gimple_code (copy
))
1682 tree r
, fndecl
= gimple_call_fndecl (copy
);
1683 if (fndecl
&& DECL_BUILT_IN_CLASS (fndecl
) == BUILT_IN_NORMAL
)
1684 switch (DECL_FUNCTION_CODE (fndecl
))
1686 case BUILT_IN_EH_COPY_VALUES
:
1687 r
= gimple_call_arg (copy
, 1);
1688 r
= remap_eh_region_tree_nr (r
, id
);
1689 gimple_call_set_arg (copy
, 1, r
);
1692 case BUILT_IN_EH_POINTER
:
1693 case BUILT_IN_EH_FILTER
:
1694 r
= gimple_call_arg (copy
, 0);
1695 r
= remap_eh_region_tree_nr (r
, id
);
1696 gimple_call_set_arg (copy
, 0, r
);
1703 /* Reset alias info if we didn't apply measures to
1704 keep it valid over inlining by setting DECL_PT_UID. */
1705 if (!id
->src_cfun
->gimple_df
1706 || !id
->src_cfun
->gimple_df
->ipa_pta
)
1707 gimple_call_reset_alias_info (as_a
<gcall
*> (copy
));
1713 gresx
*resx_stmt
= as_a
<gresx
*> (copy
);
1714 int r
= gimple_resx_region (resx_stmt
);
1715 r
= remap_eh_region_nr (r
, id
);
1716 gimple_resx_set_region (resx_stmt
, r
);
1720 case GIMPLE_EH_DISPATCH
:
1722 geh_dispatch
*eh_dispatch
= as_a
<geh_dispatch
*> (copy
);
1723 int r
= gimple_eh_dispatch_region (eh_dispatch
);
1724 r
= remap_eh_region_nr (r
, id
);
1725 gimple_eh_dispatch_set_region (eh_dispatch
, r
);
1734 /* If STMT has a block defined, map it to the newly constructed
1736 if (gimple_block (copy
))
1739 n
= id
->decl_map
->get (gimple_block (copy
));
1741 gimple_set_block (copy
, *n
);
1744 if (gimple_debug_bind_p (copy
) || gimple_debug_source_bind_p (copy
)
1745 || gimple_debug_nonbind_marker_p (copy
))
1747 gimple_seq_add_stmt (&stmts
, copy
);
1751 /* Remap all the operands in COPY. */
1752 memset (&wi
, 0, sizeof (wi
));
1755 walk_tree (gimple_op_ptr (copy
, 1), remap_gimple_op_r
, &wi
, NULL
);
1757 walk_gimple_op (copy
, remap_gimple_op_r
, &wi
);
1759 /* Clear the copied virtual operands. We are not remapping them here
1760 but are going to recreate them from scratch. */
1761 if (gimple_has_mem_ops (copy
))
1763 gimple_set_vdef (copy
, NULL_TREE
);
1764 gimple_set_vuse (copy
, NULL_TREE
);
1767 gimple_seq_add_stmt (&stmts
, copy
);
1772 /* Copy basic block, scale profile accordingly. Edges will be taken care of
1776 copy_bb (copy_body_data
*id
, basic_block bb
,
1777 profile_count num
, profile_count den
)
1779 gimple_stmt_iterator gsi
, copy_gsi
, seq_gsi
;
1780 basic_block copy_basic_block
;
1784 profile_count::adjust_for_ipa_scaling (&num
, &den
);
1786 /* Search for previous copied basic block. */
1789 prev
= prev
->prev_bb
;
1791 /* create_basic_block() will append every new block to
1792 basic_block_info automatically. */
1793 copy_basic_block
= create_basic_block (NULL
, (basic_block
) prev
->aux
);
1794 copy_basic_block
->count
= bb
->count
.apply_scale (num
, den
);
1796 copy_gsi
= gsi_start_bb (copy_basic_block
);
1798 for (gsi
= gsi_start_bb (bb
); !gsi_end_p (gsi
); gsi_next (&gsi
))
1801 gimple
*stmt
= gsi_stmt (gsi
);
1802 gimple
*orig_stmt
= stmt
;
1803 gimple_stmt_iterator stmts_gsi
;
1804 bool stmt_added
= false;
1806 id
->regimplify
= false;
1807 stmts
= remap_gimple_stmt (stmt
, id
);
1809 if (gimple_seq_empty_p (stmts
))
1814 for (stmts_gsi
= gsi_start (stmts
);
1815 !gsi_end_p (stmts_gsi
); )
1817 stmt
= gsi_stmt (stmts_gsi
);
1819 /* Advance iterator now before stmt is moved to seq_gsi. */
1820 gsi_next (&stmts_gsi
);
1822 if (gimple_nop_p (stmt
))
1825 gimple_duplicate_stmt_histograms (cfun
, stmt
, id
->src_cfun
,
1828 /* With return slot optimization we can end up with
1829 non-gimple (foo *)&this->m, fix that here. */
1830 if (is_gimple_assign (stmt
)
1831 && CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (stmt
))
1832 && !is_gimple_val (gimple_assign_rhs1 (stmt
)))
1835 new_rhs
= force_gimple_operand_gsi (&seq_gsi
,
1836 gimple_assign_rhs1 (stmt
),
1838 GSI_CONTINUE_LINKING
);
1839 gimple_assign_set_rhs1 (stmt
, new_rhs
);
1840 id
->regimplify
= false;
1843 gsi_insert_after (&seq_gsi
, stmt
, GSI_NEW_STMT
);
1846 gimple_regimplify_operands (stmt
, &seq_gsi
);
1854 /* If copy_basic_block has been empty at the start of this iteration,
1855 call gsi_start_bb again to get at the newly added statements. */
1856 if (gsi_end_p (copy_gsi
))
1857 copy_gsi
= gsi_start_bb (copy_basic_block
);
1859 gsi_next (©_gsi
);
1861 /* Process the new statement. The call to gimple_regimplify_operands
1862 possibly turned the statement into multiple statements, we
1863 need to process all of them. */
1869 stmt
= gsi_stmt (copy_gsi
);
1870 call_stmt
= dyn_cast
<gcall
*> (stmt
);
1872 && gimple_call_va_arg_pack_p (call_stmt
)
1874 && ! gimple_call_va_arg_pack_p (id
->call_stmt
))
1876 /* __builtin_va_arg_pack () should be replaced by
1877 all arguments corresponding to ... in the caller. */
1881 size_t nargs
= gimple_call_num_args (id
->call_stmt
);
1884 for (p
= DECL_ARGUMENTS (id
->src_fn
); p
; p
= DECL_CHAIN (p
))
1887 /* Create the new array of arguments. */
1888 n
= nargs
+ gimple_call_num_args (call_stmt
);
1889 argarray
.create (n
);
1890 argarray
.safe_grow_cleared (n
);
1892 /* Copy all the arguments before '...' */
1893 memcpy (argarray
.address (),
1894 gimple_call_arg_ptr (call_stmt
, 0),
1895 gimple_call_num_args (call_stmt
) * sizeof (tree
));
1897 /* Append the arguments passed in '...' */
1898 memcpy (argarray
.address () + gimple_call_num_args (call_stmt
),
1899 gimple_call_arg_ptr (id
->call_stmt
, 0)
1900 + (gimple_call_num_args (id
->call_stmt
) - nargs
),
1901 nargs
* sizeof (tree
));
1903 new_call
= gimple_build_call_vec (gimple_call_fn (call_stmt
),
1906 argarray
.release ();
1908 /* Copy all GIMPLE_CALL flags, location and block, except
1909 GF_CALL_VA_ARG_PACK. */
1910 gimple_call_copy_flags (new_call
, call_stmt
);
1911 gimple_call_set_va_arg_pack (new_call
, false);
1912 gimple_set_location (new_call
, gimple_location (stmt
));
1913 gimple_set_block (new_call
, gimple_block (stmt
));
1914 gimple_call_set_lhs (new_call
, gimple_call_lhs (call_stmt
));
1916 gsi_replace (©_gsi
, new_call
, false);
1921 && (decl
= gimple_call_fndecl (stmt
))
1922 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
1923 && DECL_FUNCTION_CODE (decl
) == BUILT_IN_VA_ARG_PACK_LEN
1924 && ! gimple_call_va_arg_pack_p (id
->call_stmt
))
1926 /* __builtin_va_arg_pack_len () should be replaced by
1927 the number of anonymous arguments. */
1928 size_t nargs
= gimple_call_num_args (id
->call_stmt
);
1932 for (p
= DECL_ARGUMENTS (id
->src_fn
); p
; p
= DECL_CHAIN (p
))
1935 count
= build_int_cst (integer_type_node
, nargs
);
1936 new_stmt
= gimple_build_assign (gimple_call_lhs (stmt
), count
);
1937 gsi_replace (©_gsi
, new_stmt
, false);
1942 && gimple_call_internal_p (stmt
)
1943 && gimple_call_internal_fn (stmt
) == IFN_TSAN_FUNC_EXIT
)
1945 /* Drop TSAN_FUNC_EXIT () internal calls during inlining. */
1946 gsi_remove (©_gsi
, false);
1950 /* Statements produced by inlining can be unfolded, especially
1951 when we constant propagated some operands. We can't fold
1952 them right now for two reasons:
1953 1) folding require SSA_NAME_DEF_STMTs to be correct
1954 2) we can't change function calls to builtins.
1955 So we just mark statement for later folding. We mark
1956 all new statements, instead just statements that has changed
1957 by some nontrivial substitution so even statements made
1958 foldable indirectly are updated. If this turns out to be
1959 expensive, copy_body can be told to watch for nontrivial
1961 if (id
->statements_to_fold
)
1962 id
->statements_to_fold
->add (stmt
);
1964 /* We're duplicating a CALL_EXPR. Find any corresponding
1965 callgraph edges and update or duplicate them. */
1966 if (gcall
*call_stmt
= dyn_cast
<gcall
*> (stmt
))
1968 struct cgraph_edge
*edge
;
1970 switch (id
->transform_call_graph_edges
)
1972 case CB_CGE_DUPLICATE
:
1973 edge
= id
->src_node
->get_edge (orig_stmt
);
1976 struct cgraph_edge
*old_edge
= edge
;
1977 profile_count old_cnt
= edge
->count
;
1978 edge
= edge
->clone (id
->dst_node
, call_stmt
,
1983 /* Speculative calls consist of two edges - direct and
1984 indirect. Duplicate the whole thing and distribute
1985 frequencies accordingly. */
1986 if (edge
->speculative
)
1988 struct cgraph_edge
*direct
, *indirect
;
1989 struct ipa_ref
*ref
;
1991 gcc_assert (!edge
->indirect_unknown_callee
);
1992 old_edge
->speculative_call_info (direct
, indirect
, ref
);
1994 profile_count indir_cnt
= indirect
->count
;
1995 indirect
= indirect
->clone (id
->dst_node
, call_stmt
,
2000 profile_probability prob
2001 = indir_cnt
.probability_in (old_cnt
+ indir_cnt
);
2003 = copy_basic_block
->count
.apply_probability (prob
);
2004 edge
->count
= copy_basic_block
->count
- indirect
->count
;
2005 id
->dst_node
->clone_reference (ref
, stmt
);
2008 edge
->count
= copy_basic_block
->count
;
2012 case CB_CGE_MOVE_CLONES
:
2013 id
->dst_node
->set_call_stmt_including_clones (orig_stmt
,
2015 edge
= id
->dst_node
->get_edge (stmt
);
2019 edge
= id
->dst_node
->get_edge (orig_stmt
);
2021 edge
->set_call_stmt (call_stmt
);
2028 /* Constant propagation on argument done during inlining
2029 may create new direct call. Produce an edge for it. */
2031 || (edge
->indirect_inlining_edge
2032 && id
->transform_call_graph_edges
== CB_CGE_MOVE_CLONES
))
2033 && id
->dst_node
->definition
2034 && (fn
= gimple_call_fndecl (stmt
)) != NULL
)
2036 struct cgraph_node
*dest
= cgraph_node::get_create (fn
);
2038 /* We have missing edge in the callgraph. This can happen
2039 when previous inlining turned an indirect call into a
2040 direct call by constant propagating arguments or we are
2041 producing dead clone (for further cloning). In all
2042 other cases we hit a bug (incorrect node sharing is the
2043 most common reason for missing edges). */
2044 gcc_assert (!dest
->definition
2045 || dest
->address_taken
2046 || !id
->src_node
->definition
2047 || !id
->dst_node
->definition
);
2048 if (id
->transform_call_graph_edges
== CB_CGE_MOVE_CLONES
)
2049 id
->dst_node
->create_edge_including_clones
2050 (dest
, orig_stmt
, call_stmt
, bb
->count
,
2051 CIF_ORIGINALLY_INDIRECT_CALL
);
2053 id
->dst_node
->create_edge (dest
, call_stmt
,
2054 bb
->count
)->inline_failed
2055 = CIF_ORIGINALLY_INDIRECT_CALL
;
2058 fprintf (dump_file
, "Created new direct edge to %s\n",
2063 notice_special_calls (as_a
<gcall
*> (stmt
));
2066 maybe_duplicate_eh_stmt_fn (cfun
, stmt
, id
->src_cfun
, orig_stmt
,
2067 id
->eh_map
, id
->eh_lp_nr
);
2069 gsi_next (©_gsi
);
2071 while (!gsi_end_p (copy_gsi
));
2073 copy_gsi
= gsi_last_bb (copy_basic_block
);
2076 return copy_basic_block
;
2079 /* Inserting Single Entry Multiple Exit region in SSA form into code in SSA
2080 form is quite easy, since dominator relationship for old basic blocks does
2083 There is however exception where inlining might change dominator relation
2084 across EH edges from basic block within inlined functions destinating
2085 to landing pads in function we inline into.
2087 The function fills in PHI_RESULTs of such PHI nodes if they refer
2088 to gimple regs. Otherwise, the function mark PHI_RESULT of such
2089 PHI nodes for renaming. For non-gimple regs, renaming is safe: the
2090 EH edges are abnormal and SSA_NAME_OCCURS_IN_ABNORMAL_PHI must be
2091 set, and this means that there will be no overlapping live ranges
2092 for the underlying symbol.
2094 This might change in future if we allow redirecting of EH edges and
2095 we might want to change way build CFG pre-inlining to include
2096 all the possible edges then. */
2098 update_ssa_across_abnormal_edges (basic_block bb
, basic_block ret_bb
,
2099 bool can_throw
, bool nonlocal_goto
)
2104 FOR_EACH_EDGE (e
, ei
, bb
->succs
)
2106 || ((basic_block
)e
->dest
->aux
)->index
== ENTRY_BLOCK
)
2112 gcc_assert (e
->flags
& EDGE_EH
);
2115 gcc_assert (!(e
->flags
& EDGE_EH
));
2117 for (si
= gsi_start_phis (e
->dest
); !gsi_end_p (si
); gsi_next (&si
))
2123 /* For abnormal goto/call edges the receiver can be the
2124 ENTRY_BLOCK. Do not assert this cannot happen. */
2126 gcc_assert ((e
->flags
& EDGE_EH
)
2127 || SSA_NAME_OCCURS_IN_ABNORMAL_PHI (PHI_RESULT (phi
)));
2129 re
= find_edge (ret_bb
, e
->dest
);
2130 gcc_checking_assert (re
);
2131 gcc_assert ((re
->flags
& (EDGE_EH
| EDGE_ABNORMAL
))
2132 == (e
->flags
& (EDGE_EH
| EDGE_ABNORMAL
)));
2134 SET_USE (PHI_ARG_DEF_PTR_FROM_EDGE (phi
, e
),
2135 USE_FROM_PTR (PHI_ARG_DEF_PTR_FROM_EDGE (phi
, re
)));
2141 /* Copy edges from BB into its copy constructed earlier, scale profile
2142 accordingly. Edges will be taken care of later. Assume aux
2143 pointers to point to the copies of each BB. Return true if any
2144 debug stmts are left after a statement that must end the basic block. */
2147 copy_edges_for_bb (basic_block bb
, profile_count num
, profile_count den
,
2148 basic_block ret_bb
, basic_block abnormal_goto_dest
)
2150 basic_block new_bb
= (basic_block
) bb
->aux
;
2153 gimple_stmt_iterator si
;
2155 bool need_debug_cleanup
= false;
2157 /* Use the indices from the original blocks to create edges for the
2159 FOR_EACH_EDGE (old_edge
, ei
, bb
->succs
)
2160 if (!(old_edge
->flags
& EDGE_EH
))
2164 flags
= old_edge
->flags
;
2166 /* Return edges do get a FALLTHRU flag when the get inlined. */
2167 if (old_edge
->dest
->index
== EXIT_BLOCK
2168 && !(old_edge
->flags
& (EDGE_TRUE_VALUE
|EDGE_FALSE_VALUE
|EDGE_FAKE
))
2169 && old_edge
->dest
->aux
!= EXIT_BLOCK_PTR_FOR_FN (cfun
))
2170 flags
|= EDGE_FALLTHRU
;
2171 new_edge
= make_edge (new_bb
, (basic_block
) old_edge
->dest
->aux
, flags
);
2172 new_edge
->probability
= old_edge
->probability
;
2175 if (bb
->index
== ENTRY_BLOCK
|| bb
->index
== EXIT_BLOCK
)
2178 /* When doing function splitting, we must decreate count of the return block
2179 which was previously reachable by block we did not copy. */
2180 if (single_succ_p (bb
) && single_succ_edge (bb
)->dest
->index
== EXIT_BLOCK
)
2181 FOR_EACH_EDGE (old_edge
, ei
, bb
->preds
)
2182 if (old_edge
->src
->index
!= ENTRY_BLOCK
2183 && !old_edge
->src
->aux
)
2184 new_bb
->count
-= old_edge
->count ().apply_scale (num
, den
);
2186 for (si
= gsi_start_bb (new_bb
); !gsi_end_p (si
);)
2189 bool can_throw
, nonlocal_goto
;
2191 copy_stmt
= gsi_stmt (si
);
2192 if (!is_gimple_debug (copy_stmt
))
2193 update_stmt (copy_stmt
);
2195 /* Do this before the possible split_block. */
2198 /* If this tree could throw an exception, there are two
2199 cases where we need to add abnormal edge(s): the
2200 tree wasn't in a region and there is a "current
2201 region" in the caller; or the original tree had
2202 EH edges. In both cases split the block after the tree,
2203 and add abnormal edge(s) as needed; we need both
2204 those from the callee and the caller.
2205 We check whether the copy can throw, because the const
2206 propagation can change an INDIRECT_REF which throws
2207 into a COMPONENT_REF which doesn't. If the copy
2208 can throw, the original could also throw. */
2209 can_throw
= stmt_can_throw_internal (copy_stmt
);
2211 = (stmt_can_make_abnormal_goto (copy_stmt
)
2212 && !computed_goto_p (copy_stmt
));
2214 if (can_throw
|| nonlocal_goto
)
2216 if (!gsi_end_p (si
))
2218 while (!gsi_end_p (si
) && is_gimple_debug (gsi_stmt (si
)))
2221 need_debug_cleanup
= true;
2223 if (!gsi_end_p (si
))
2224 /* Note that bb's predecessor edges aren't necessarily
2225 right at this point; split_block doesn't care. */
2227 edge e
= split_block (new_bb
, copy_stmt
);
2230 new_bb
->aux
= e
->src
->aux
;
2231 si
= gsi_start_bb (new_bb
);
2235 bool update_probs
= false;
2237 if (gimple_code (copy_stmt
) == GIMPLE_EH_DISPATCH
)
2239 make_eh_dispatch_edges (as_a
<geh_dispatch
*> (copy_stmt
));
2240 update_probs
= true;
2244 make_eh_edges (copy_stmt
);
2245 update_probs
= true;
2248 /* EH edges may not match old edges. Copy as much as possible. */
2253 basic_block copy_stmt_bb
= gimple_bb (copy_stmt
);
2255 FOR_EACH_EDGE (old_edge
, ei
, bb
->succs
)
2256 if ((old_edge
->flags
& EDGE_EH
)
2257 && (e
= find_edge (copy_stmt_bb
,
2258 (basic_block
) old_edge
->dest
->aux
))
2259 && (e
->flags
& EDGE_EH
))
2260 e
->probability
= old_edge
->probability
;
2262 FOR_EACH_EDGE (e
, ei
, copy_stmt_bb
->succs
)
2263 if ((e
->flags
& EDGE_EH
) && !e
->probability
.initialized_p ())
2264 e
->probability
= profile_probability::never ();
2268 /* If the call we inline cannot make abnormal goto do not add
2269 additional abnormal edges but only retain those already present
2270 in the original function body. */
2271 if (abnormal_goto_dest
== NULL
)
2272 nonlocal_goto
= false;
2275 basic_block copy_stmt_bb
= gimple_bb (copy_stmt
);
2277 if (get_abnormal_succ_dispatcher (copy_stmt_bb
))
2278 nonlocal_goto
= false;
2279 /* ABNORMAL_DISPATCHER (1) is for longjmp/setjmp or nonlocal gotos
2280 in OpenMP regions which aren't allowed to be left abnormally.
2281 So, no need to add abnormal edge in that case. */
2282 else if (is_gimple_call (copy_stmt
)
2283 && gimple_call_internal_p (copy_stmt
)
2284 && (gimple_call_internal_fn (copy_stmt
)
2285 == IFN_ABNORMAL_DISPATCHER
)
2286 && gimple_call_arg (copy_stmt
, 0) == boolean_true_node
)
2287 nonlocal_goto
= false;
2289 make_single_succ_edge (copy_stmt_bb
, abnormal_goto_dest
,
2293 if ((can_throw
|| nonlocal_goto
)
2294 && gimple_in_ssa_p (cfun
))
2295 update_ssa_across_abnormal_edges (gimple_bb (copy_stmt
), ret_bb
,
2296 can_throw
, nonlocal_goto
);
2298 return need_debug_cleanup
;
2301 /* Copy the PHIs. All blocks and edges are copied, some blocks
2302 was possibly split and new outgoing EH edges inserted.
2303 BB points to the block of original function and AUX pointers links
2304 the original and newly copied blocks. */
2307 copy_phis_for_bb (basic_block bb
, copy_body_data
*id
)
2309 basic_block
const new_bb
= (basic_block
) bb
->aux
;
2314 bool inserted
= false;
2316 for (si
= gsi_start_phis (bb
); !gsi_end_p (si
); gsi_next (&si
))
2322 res
= PHI_RESULT (phi
);
2324 if (!virtual_operand_p (res
))
2326 walk_tree (&new_res
, copy_tree_body_r
, id
, NULL
);
2327 if (EDGE_COUNT (new_bb
->preds
) == 0)
2329 /* Technically we'd want a SSA_DEFAULT_DEF here... */
2330 SSA_NAME_DEF_STMT (new_res
) = gimple_build_nop ();
2334 new_phi
= create_phi_node (new_res
, new_bb
);
2335 FOR_EACH_EDGE (new_edge
, ei
, new_bb
->preds
)
2337 edge old_edge
= find_edge ((basic_block
) new_edge
->src
->aux
,
2344 /* When doing partial cloning, we allow PHIs on the entry
2345 block as long as all the arguments are the same.
2346 Find any input edge to see argument to copy. */
2348 FOR_EACH_EDGE (old_edge
, ei2
, bb
->preds
)
2349 if (!old_edge
->src
->aux
)
2352 arg
= PHI_ARG_DEF_FROM_EDGE (phi
, old_edge
);
2354 walk_tree (&new_arg
, copy_tree_body_r
, id
, NULL
);
2355 gcc_assert (new_arg
);
2356 /* With return slot optimization we can end up with
2357 non-gimple (foo *)&this->m, fix that here. */
2358 if (TREE_CODE (new_arg
) != SSA_NAME
2359 && TREE_CODE (new_arg
) != FUNCTION_DECL
2360 && !is_gimple_val (new_arg
))
2362 gimple_seq stmts
= NULL
;
2363 new_arg
= force_gimple_operand (new_arg
, &stmts
, true,
2365 gsi_insert_seq_on_edge (new_edge
, stmts
);
2368 locus
= gimple_phi_arg_location_from_edge (phi
, old_edge
);
2369 if (LOCATION_BLOCK (locus
))
2372 n
= id
->decl_map
->get (LOCATION_BLOCK (locus
));
2374 locus
= set_block (locus
, *n
);
2377 locus
= LOCATION_LOCUS (locus
);
2379 add_phi_arg (new_phi
, new_arg
, new_edge
, locus
);
2385 /* Commit the delayed edge insertions. */
2387 FOR_EACH_EDGE (new_edge
, ei
, new_bb
->preds
)
2388 gsi_commit_one_edge_insert (new_edge
, NULL
);
2392 /* Wrapper for remap_decl so it can be used as a callback. */
2395 remap_decl_1 (tree decl
, void *data
)
2397 return remap_decl (decl
, (copy_body_data
*) data
);
2400 /* Build struct function and associated datastructures for the new clone
2401 NEW_FNDECL to be build. CALLEE_FNDECL is the original. Function changes
2402 the cfun to the function of new_fndecl (and current_function_decl too). */
2405 initialize_cfun (tree new_fndecl
, tree callee_fndecl
, profile_count count
)
2407 struct function
*src_cfun
= DECL_STRUCT_FUNCTION (callee_fndecl
);
2409 if (!DECL_ARGUMENTS (new_fndecl
))
2410 DECL_ARGUMENTS (new_fndecl
) = DECL_ARGUMENTS (callee_fndecl
);
2411 if (!DECL_RESULT (new_fndecl
))
2412 DECL_RESULT (new_fndecl
) = DECL_RESULT (callee_fndecl
);
2414 /* Register specific tree functions. */
2415 gimple_register_cfg_hooks ();
2417 /* Get clean struct function. */
2418 push_struct_function (new_fndecl
);
2420 /* We will rebuild these, so just sanity check that they are empty. */
2421 gcc_assert (VALUE_HISTOGRAMS (cfun
) == NULL
);
2422 gcc_assert (cfun
->local_decls
== NULL
);
2423 gcc_assert (cfun
->cfg
== NULL
);
2424 gcc_assert (cfun
->decl
== new_fndecl
);
2426 /* Copy items we preserve during cloning. */
2427 cfun
->static_chain_decl
= src_cfun
->static_chain_decl
;
2428 cfun
->nonlocal_goto_save_area
= src_cfun
->nonlocal_goto_save_area
;
2429 cfun
->function_end_locus
= src_cfun
->function_end_locus
;
2430 cfun
->curr_properties
= src_cfun
->curr_properties
;
2431 cfun
->last_verified
= src_cfun
->last_verified
;
2432 cfun
->va_list_gpr_size
= src_cfun
->va_list_gpr_size
;
2433 cfun
->va_list_fpr_size
= src_cfun
->va_list_fpr_size
;
2434 cfun
->has_nonlocal_label
= src_cfun
->has_nonlocal_label
;
2435 cfun
->stdarg
= src_cfun
->stdarg
;
2436 cfun
->after_inlining
= src_cfun
->after_inlining
;
2437 cfun
->can_throw_non_call_exceptions
2438 = src_cfun
->can_throw_non_call_exceptions
;
2439 cfun
->can_delete_dead_exceptions
= src_cfun
->can_delete_dead_exceptions
;
2440 cfun
->returns_struct
= src_cfun
->returns_struct
;
2441 cfun
->returns_pcc_struct
= src_cfun
->returns_pcc_struct
;
2443 init_empty_tree_cfg ();
2445 profile_status_for_fn (cfun
) = profile_status_for_fn (src_cfun
);
2447 profile_count num
= count
;
2448 profile_count den
= ENTRY_BLOCK_PTR_FOR_FN (src_cfun
)->count
;
2449 profile_count::adjust_for_ipa_scaling (&num
, &den
);
2451 ENTRY_BLOCK_PTR_FOR_FN (cfun
)->count
=
2452 ENTRY_BLOCK_PTR_FOR_FN (src_cfun
)->count
.apply_scale (count
,
2453 ENTRY_BLOCK_PTR_FOR_FN (src_cfun
)->count
);
2454 EXIT_BLOCK_PTR_FOR_FN (cfun
)->count
=
2455 EXIT_BLOCK_PTR_FOR_FN (src_cfun
)->count
.apply_scale (count
,
2456 ENTRY_BLOCK_PTR_FOR_FN (src_cfun
)->count
);
2458 init_eh_for_function ();
2460 if (src_cfun
->gimple_df
)
2462 init_tree_ssa (cfun
);
2463 cfun
->gimple_df
->in_ssa_p
= src_cfun
->gimple_df
->in_ssa_p
;
2464 if (cfun
->gimple_df
->in_ssa_p
)
2465 init_ssa_operands (cfun
);
2469 /* Helper function for copy_cfg_body. Move debug stmts from the end
2470 of NEW_BB to the beginning of successor basic blocks when needed. If the
2471 successor has multiple predecessors, reset them, otherwise keep
2475 maybe_move_debug_stmts_to_successors (copy_body_data
*id
, basic_block new_bb
)
2479 gimple_stmt_iterator si
= gsi_last_nondebug_bb (new_bb
);
2482 || gsi_one_before_end_p (si
)
2483 || !(stmt_can_throw_internal (gsi_stmt (si
))
2484 || stmt_can_make_abnormal_goto (gsi_stmt (si
))))
2487 FOR_EACH_EDGE (e
, ei
, new_bb
->succs
)
2489 gimple_stmt_iterator ssi
= gsi_last_bb (new_bb
);
2490 gimple_stmt_iterator dsi
= gsi_after_labels (e
->dest
);
2491 while (is_gimple_debug (gsi_stmt (ssi
)))
2493 gimple
*stmt
= gsi_stmt (ssi
);
2498 /* For the last edge move the debug stmts instead of copying
2500 if (ei_one_before_end_p (ei
))
2504 if (!single_pred_p (e
->dest
) && gimple_debug_bind_p (stmt
))
2505 gimple_debug_bind_reset_value (stmt
);
2506 gsi_remove (&si
, false);
2507 gsi_insert_before (&dsi
, stmt
, GSI_SAME_STMT
);
2511 if (gimple_debug_bind_p (stmt
))
2513 var
= gimple_debug_bind_get_var (stmt
);
2514 if (single_pred_p (e
->dest
))
2516 value
= gimple_debug_bind_get_value (stmt
);
2517 value
= unshare_expr (value
);
2521 new_stmt
= gimple_build_debug_bind (var
, value
, stmt
);
2523 else if (gimple_debug_source_bind_p (stmt
))
2525 var
= gimple_debug_source_bind_get_var (stmt
);
2526 value
= gimple_debug_source_bind_get_value (stmt
);
2527 new_stmt
= gimple_build_debug_source_bind (var
, value
, stmt
);
2529 else if (gimple_debug_nonbind_marker_p (stmt
))
2530 new_stmt
= as_a
<gdebug
*> (gimple_copy (stmt
));
2533 gsi_insert_before (&dsi
, new_stmt
, GSI_SAME_STMT
);
2534 id
->debug_stmts
.safe_push (new_stmt
);
2540 /* Make a copy of the sub-loops of SRC_PARENT and place them
2541 as siblings of DEST_PARENT. */
2544 copy_loops (copy_body_data
*id
,
2545 struct loop
*dest_parent
, struct loop
*src_parent
)
2547 struct loop
*src_loop
= src_parent
->inner
;
2550 if (!id
->blocks_to_copy
2551 || bitmap_bit_p (id
->blocks_to_copy
, src_loop
->header
->index
))
2553 struct loop
*dest_loop
= alloc_loop ();
2555 /* Assign the new loop its header and latch and associate
2556 those with the new loop. */
2557 dest_loop
->header
= (basic_block
)src_loop
->header
->aux
;
2558 dest_loop
->header
->loop_father
= dest_loop
;
2559 if (src_loop
->latch
!= NULL
)
2561 dest_loop
->latch
= (basic_block
)src_loop
->latch
->aux
;
2562 dest_loop
->latch
->loop_father
= dest_loop
;
2565 /* Copy loop meta-data. */
2566 copy_loop_info (src_loop
, dest_loop
);
2568 /* Finally place it into the loop array and the loop tree. */
2569 place_new_loop (cfun
, dest_loop
);
2570 flow_loop_tree_node_add (dest_parent
, dest_loop
);
2572 dest_loop
->safelen
= src_loop
->safelen
;
2573 if (src_loop
->unroll
)
2575 dest_loop
->unroll
= src_loop
->unroll
;
2576 cfun
->has_unroll
= true;
2578 dest_loop
->dont_vectorize
= src_loop
->dont_vectorize
;
2579 if (src_loop
->force_vectorize
)
2581 dest_loop
->force_vectorize
= true;
2582 cfun
->has_force_vectorize_loops
= true;
2584 if (src_loop
->simduid
)
2586 dest_loop
->simduid
= remap_decl (src_loop
->simduid
, id
);
2587 cfun
->has_simduid_loops
= true;
2591 copy_loops (id
, dest_loop
, src_loop
);
2593 src_loop
= src_loop
->next
;
2597 /* Call cgraph_redirect_edge_call_stmt_to_callee on all calls in BB */
2600 redirect_all_calls (copy_body_data
* id
, basic_block bb
)
2602 gimple_stmt_iterator si
;
2603 gimple
*last
= last_stmt (bb
);
2604 for (si
= gsi_start_bb (bb
); !gsi_end_p (si
); gsi_next (&si
))
2606 gimple
*stmt
= gsi_stmt (si
);
2607 if (is_gimple_call (stmt
))
2609 struct cgraph_edge
*edge
= id
->dst_node
->get_edge (stmt
);
2612 edge
->redirect_call_stmt_to_callee ();
2613 if (stmt
== last
&& id
->call_stmt
&& maybe_clean_eh_stmt (stmt
))
2614 gimple_purge_dead_eh_edges (bb
);
2620 /* Make a copy of the body of FN so that it can be inserted inline in
2621 another function. Walks FN via CFG, returns new fndecl. */
2624 copy_cfg_body (copy_body_data
* id
,
2625 basic_block entry_block_map
, basic_block exit_block_map
,
2626 basic_block new_entry
)
2628 tree callee_fndecl
= id
->src_fn
;
2629 /* Original cfun for the callee, doesn't change. */
2630 struct function
*src_cfun
= DECL_STRUCT_FUNCTION (callee_fndecl
);
2631 struct function
*cfun_to_copy
;
2633 tree new_fndecl
= NULL
;
2634 bool need_debug_cleanup
= false;
2636 profile_count den
= ENTRY_BLOCK_PTR_FOR_FN (src_cfun
)->count
;
2637 profile_count num
= entry_block_map
->count
;
2639 cfun_to_copy
= id
->src_cfun
= DECL_STRUCT_FUNCTION (callee_fndecl
);
2641 /* Register specific tree functions. */
2642 gimple_register_cfg_hooks ();
2644 /* If we are inlining just region of the function, make sure to connect
2645 new entry to ENTRY_BLOCK_PTR_FOR_FN (cfun). Since new entry can be
2646 part of loop, we must compute frequency and probability of
2647 ENTRY_BLOCK_PTR_FOR_FN (cfun) based on the frequencies and
2648 probabilities of edges incoming from nonduplicated region. */
2653 den
= profile_count::zero ();
2655 FOR_EACH_EDGE (e
, ei
, new_entry
->preds
)
2658 ENTRY_BLOCK_PTR_FOR_FN (cfun
)->count
= den
;
2661 profile_count::adjust_for_ipa_scaling (&num
, &den
);
2663 /* Must have a CFG here at this point. */
2664 gcc_assert (ENTRY_BLOCK_PTR_FOR_FN
2665 (DECL_STRUCT_FUNCTION (callee_fndecl
)));
2668 ENTRY_BLOCK_PTR_FOR_FN (cfun_to_copy
)->aux
= entry_block_map
;
2669 EXIT_BLOCK_PTR_FOR_FN (cfun_to_copy
)->aux
= exit_block_map
;
2670 entry_block_map
->aux
= ENTRY_BLOCK_PTR_FOR_FN (cfun_to_copy
);
2671 exit_block_map
->aux
= EXIT_BLOCK_PTR_FOR_FN (cfun_to_copy
);
2673 /* Duplicate any exception-handling regions. */
2675 id
->eh_map
= duplicate_eh_regions (cfun_to_copy
, NULL
, id
->eh_lp_nr
,
2678 /* Use aux pointers to map the original blocks to copy. */
2679 FOR_EACH_BB_FN (bb
, cfun_to_copy
)
2680 if (!id
->blocks_to_copy
|| bitmap_bit_p (id
->blocks_to_copy
, bb
->index
))
2682 basic_block new_bb
= copy_bb (id
, bb
, num
, den
);
2685 new_bb
->loop_father
= entry_block_map
->loop_father
;
2688 last
= last_basic_block_for_fn (cfun
);
2690 /* Now that we've duplicated the blocks, duplicate their edges. */
2691 basic_block abnormal_goto_dest
= NULL
;
2693 && stmt_can_make_abnormal_goto (id
->call_stmt
))
2695 gimple_stmt_iterator gsi
= gsi_for_stmt (id
->call_stmt
);
2697 bb
= gimple_bb (id
->call_stmt
);
2699 if (gsi_end_p (gsi
))
2700 abnormal_goto_dest
= get_abnormal_succ_dispatcher (bb
);
2702 FOR_ALL_BB_FN (bb
, cfun_to_copy
)
2703 if (!id
->blocks_to_copy
2704 || (bb
->index
> 0 && bitmap_bit_p (id
->blocks_to_copy
, bb
->index
)))
2705 need_debug_cleanup
|= copy_edges_for_bb (bb
, num
, den
, exit_block_map
,
2706 abnormal_goto_dest
);
2710 edge e
= make_edge (entry_block_map
, (basic_block
)new_entry
->aux
,
2712 e
->probability
= profile_probability::always ();
2715 /* Duplicate the loop tree, if available and wanted. */
2716 if (loops_for_fn (src_cfun
) != NULL
2717 && current_loops
!= NULL
)
2719 copy_loops (id
, entry_block_map
->loop_father
,
2720 get_loop (src_cfun
, 0));
2721 /* Defer to cfgcleanup to update loop-father fields of basic-blocks. */
2722 loops_state_set (LOOPS_NEED_FIXUP
);
2725 /* If the loop tree in the source function needed fixup, mark the
2726 destination loop tree for fixup, too. */
2727 if (loops_for_fn (src_cfun
)->state
& LOOPS_NEED_FIXUP
)
2728 loops_state_set (LOOPS_NEED_FIXUP
);
2730 if (gimple_in_ssa_p (cfun
))
2731 FOR_ALL_BB_FN (bb
, cfun_to_copy
)
2732 if (!id
->blocks_to_copy
2733 || (bb
->index
> 0 && bitmap_bit_p (id
->blocks_to_copy
, bb
->index
)))
2734 copy_phis_for_bb (bb
, id
);
2736 FOR_ALL_BB_FN (bb
, cfun_to_copy
)
2739 if (need_debug_cleanup
2740 && bb
->index
!= ENTRY_BLOCK
2741 && bb
->index
!= EXIT_BLOCK
)
2742 maybe_move_debug_stmts_to_successors (id
, (basic_block
) bb
->aux
);
2743 /* Update call edge destinations. This can not be done before loop
2744 info is updated, because we may split basic blocks. */
2745 if (id
->transform_call_graph_edges
== CB_CGE_DUPLICATE
2746 && bb
->index
!= ENTRY_BLOCK
2747 && bb
->index
!= EXIT_BLOCK
)
2748 redirect_all_calls (id
, (basic_block
)bb
->aux
);
2749 ((basic_block
)bb
->aux
)->aux
= NULL
;
2753 /* Zero out AUX fields of newly created block during EH edge
2755 for (; last
< last_basic_block_for_fn (cfun
); last
++)
2757 if (need_debug_cleanup
)
2758 maybe_move_debug_stmts_to_successors (id
,
2759 BASIC_BLOCK_FOR_FN (cfun
, last
));
2760 BASIC_BLOCK_FOR_FN (cfun
, last
)->aux
= NULL
;
2761 /* Update call edge destinations. This can not be done before loop
2762 info is updated, because we may split basic blocks. */
2763 if (id
->transform_call_graph_edges
== CB_CGE_DUPLICATE
)
2764 redirect_all_calls (id
, BASIC_BLOCK_FOR_FN (cfun
, last
));
2766 entry_block_map
->aux
= NULL
;
2767 exit_block_map
->aux
= NULL
;
2774 if (id
->dependence_map
)
2776 delete id
->dependence_map
;
2777 id
->dependence_map
= NULL
;
2783 /* Copy the debug STMT using ID. We deal with these statements in a
2784 special way: if any variable in their VALUE expression wasn't
2785 remapped yet, we won't remap it, because that would get decl uids
2786 out of sync, causing codegen differences between -g and -g0. If
2787 this arises, we drop the VALUE expression altogether. */
2790 copy_debug_stmt (gdebug
*stmt
, copy_body_data
*id
)
2793 struct walk_stmt_info wi
;
2795 if (gimple_block (stmt
))
2797 n
= id
->decl_map
->get (gimple_block (stmt
));
2798 gimple_set_block (stmt
, n
? *n
: id
->block
);
2801 if (gimple_debug_nonbind_marker_p (stmt
))
2804 /* Remap all the operands in COPY. */
2805 memset (&wi
, 0, sizeof (wi
));
2808 processing_debug_stmt
= 1;
2810 if (gimple_debug_source_bind_p (stmt
))
2811 t
= gimple_debug_source_bind_get_var (stmt
);
2812 else if (gimple_debug_bind_p (stmt
))
2813 t
= gimple_debug_bind_get_var (stmt
);
2817 if (TREE_CODE (t
) == PARM_DECL
&& id
->debug_map
2818 && (n
= id
->debug_map
->get (t
)))
2820 gcc_assert (VAR_P (*n
));
2823 else if (VAR_P (t
) && !is_global_var (t
) && !id
->decl_map
->get (t
))
2824 /* T is a non-localized variable. */;
2826 walk_tree (&t
, remap_gimple_op_r
, &wi
, NULL
);
2828 if (gimple_debug_bind_p (stmt
))
2830 gimple_debug_bind_set_var (stmt
, t
);
2832 if (gimple_debug_bind_has_value_p (stmt
))
2833 walk_tree (gimple_debug_bind_get_value_ptr (stmt
),
2834 remap_gimple_op_r
, &wi
, NULL
);
2836 /* Punt if any decl couldn't be remapped. */
2837 if (processing_debug_stmt
< 0)
2838 gimple_debug_bind_reset_value (stmt
);
2840 else if (gimple_debug_source_bind_p (stmt
))
2842 gimple_debug_source_bind_set_var (stmt
, t
);
2843 /* When inlining and source bind refers to one of the optimized
2844 away parameters, change the source bind into normal debug bind
2845 referring to the corresponding DEBUG_EXPR_DECL that should have
2846 been bound before the call stmt. */
2847 t
= gimple_debug_source_bind_get_value (stmt
);
2849 && TREE_CODE (t
) == PARM_DECL
2852 vec
<tree
, va_gc
> **debug_args
= decl_debug_args_lookup (id
->src_fn
);
2854 if (debug_args
!= NULL
)
2856 for (i
= 0; i
< vec_safe_length (*debug_args
); i
+= 2)
2857 if ((**debug_args
)[i
] == DECL_ORIGIN (t
)
2858 && TREE_CODE ((**debug_args
)[i
+ 1]) == DEBUG_EXPR_DECL
)
2860 t
= (**debug_args
)[i
+ 1];
2861 stmt
->subcode
= GIMPLE_DEBUG_BIND
;
2862 gimple_debug_bind_set_value (stmt
, t
);
2867 if (gimple_debug_source_bind_p (stmt
))
2868 walk_tree (gimple_debug_source_bind_get_value_ptr (stmt
),
2869 remap_gimple_op_r
, &wi
, NULL
);
2872 processing_debug_stmt
= 0;
2877 /* Process deferred debug stmts. In order to give values better odds
2878 of being successfully remapped, we delay the processing of debug
2879 stmts until all other stmts that might require remapping are
2883 copy_debug_stmts (copy_body_data
*id
)
2888 if (!id
->debug_stmts
.exists ())
2891 FOR_EACH_VEC_ELT (id
->debug_stmts
, i
, stmt
)
2892 copy_debug_stmt (stmt
, id
);
2894 id
->debug_stmts
.release ();
2897 /* Make a copy of the body of SRC_FN so that it can be inserted inline in
2898 another function. */
2901 copy_tree_body (copy_body_data
*id
)
2903 tree fndecl
= id
->src_fn
;
2904 tree body
= DECL_SAVED_TREE (fndecl
);
2906 walk_tree (&body
, copy_tree_body_r
, id
, NULL
);
2911 /* Make a copy of the body of FN so that it can be inserted inline in
2912 another function. */
2915 copy_body (copy_body_data
*id
,
2916 basic_block entry_block_map
, basic_block exit_block_map
,
2917 basic_block new_entry
)
2919 tree fndecl
= id
->src_fn
;
2922 /* If this body has a CFG, walk CFG and copy. */
2923 gcc_assert (ENTRY_BLOCK_PTR_FOR_FN (DECL_STRUCT_FUNCTION (fndecl
)));
2924 body
= copy_cfg_body (id
, entry_block_map
, exit_block_map
,
2926 copy_debug_stmts (id
);
2931 /* Return true if VALUE is an ADDR_EXPR of an automatic variable
2932 defined in function FN, or of a data member thereof. */
2935 self_inlining_addr_expr (tree value
, tree fn
)
2939 if (TREE_CODE (value
) != ADDR_EXPR
)
2942 var
= get_base_address (TREE_OPERAND (value
, 0));
2944 return var
&& auto_var_in_fn_p (var
, fn
);
2947 /* Append to BB a debug annotation that binds VAR to VALUE, inheriting
2948 lexical block and line number information from base_stmt, if given,
2949 or from the last stmt of the block otherwise. */
2952 insert_init_debug_bind (copy_body_data
*id
,
2953 basic_block bb
, tree var
, tree value
,
2957 gimple_stmt_iterator gsi
;
2960 if (!gimple_in_ssa_p (id
->src_cfun
))
2963 if (!opt_for_fn (id
->dst_fn
, flag_var_tracking_assignments
))
2966 tracked_var
= target_for_debug_bind (var
);
2972 gsi
= gsi_last_bb (bb
);
2973 if (!base_stmt
&& !gsi_end_p (gsi
))
2974 base_stmt
= gsi_stmt (gsi
);
2977 note
= gimple_build_debug_bind (tracked_var
, unshare_expr (value
), base_stmt
);
2981 if (!gsi_end_p (gsi
))
2982 gsi_insert_after (&gsi
, note
, GSI_SAME_STMT
);
2984 gsi_insert_before (&gsi
, note
, GSI_SAME_STMT
);
2991 insert_init_stmt (copy_body_data
*id
, basic_block bb
, gimple
*init_stmt
)
2993 /* If VAR represents a zero-sized variable, it's possible that the
2994 assignment statement may result in no gimple statements. */
2997 gimple_stmt_iterator si
= gsi_last_bb (bb
);
2999 /* We can end up with init statements that store to a non-register
3000 from a rhs with a conversion. Handle that here by forcing the
3001 rhs into a temporary. gimple_regimplify_operands is not
3002 prepared to do this for us. */
3003 if (!is_gimple_debug (init_stmt
)
3004 && !is_gimple_reg (gimple_assign_lhs (init_stmt
))
3005 && is_gimple_reg_type (TREE_TYPE (gimple_assign_lhs (init_stmt
)))
3006 && gimple_assign_rhs_class (init_stmt
) == GIMPLE_UNARY_RHS
)
3008 tree rhs
= build1 (gimple_assign_rhs_code (init_stmt
),
3009 gimple_expr_type (init_stmt
),
3010 gimple_assign_rhs1 (init_stmt
));
3011 rhs
= force_gimple_operand_gsi (&si
, rhs
, true, NULL_TREE
, false,
3013 gimple_assign_set_rhs_code (init_stmt
, TREE_CODE (rhs
));
3014 gimple_assign_set_rhs1 (init_stmt
, rhs
);
3016 gsi_insert_after (&si
, init_stmt
, GSI_NEW_STMT
);
3017 gimple_regimplify_operands (init_stmt
, &si
);
3019 if (!is_gimple_debug (init_stmt
))
3021 tree def
= gimple_assign_lhs (init_stmt
);
3022 insert_init_debug_bind (id
, bb
, def
, def
, init_stmt
);
3027 /* Initialize parameter P with VALUE. If needed, produce init statement
3028 at the end of BB. When BB is NULL, we return init statement to be
3031 setup_one_parameter (copy_body_data
*id
, tree p
, tree value
, tree fn
,
3032 basic_block bb
, tree
*vars
)
3034 gimple
*init_stmt
= NULL
;
3037 tree def
= (gimple_in_ssa_p (cfun
)
3038 ? ssa_default_def (id
->src_cfun
, p
) : NULL
);
3041 && value
!= error_mark_node
3042 && !useless_type_conversion_p (TREE_TYPE (p
), TREE_TYPE (value
)))
3044 /* If we can match up types by promotion/demotion do so. */
3045 if (fold_convertible_p (TREE_TYPE (p
), value
))
3046 rhs
= fold_convert (TREE_TYPE (p
), value
);
3049 /* ??? For valid programs we should not end up here.
3050 Still if we end up with truly mismatched types here, fall back
3051 to using a VIEW_CONVERT_EXPR or a literal zero to not leak invalid
3052 GIMPLE to the following passes. */
3053 if (!is_gimple_reg_type (TREE_TYPE (value
))
3054 || TYPE_SIZE (TREE_TYPE (p
)) == TYPE_SIZE (TREE_TYPE (value
)))
3055 rhs
= fold_build1 (VIEW_CONVERT_EXPR
, TREE_TYPE (p
), value
);
3057 rhs
= build_zero_cst (TREE_TYPE (p
));
3061 /* Make an equivalent VAR_DECL. Note that we must NOT remap the type
3062 here since the type of this decl must be visible to the calling
3064 var
= copy_decl_to_var (p
, id
);
3066 /* Declare this new variable. */
3067 DECL_CHAIN (var
) = *vars
;
3070 /* Make gimplifier happy about this variable. */
3071 DECL_SEEN_IN_BIND_EXPR_P (var
) = 1;
3073 /* If the parameter is never assigned to, has no SSA_NAMEs created,
3074 we would not need to create a new variable here at all, if it
3075 weren't for debug info. Still, we can just use the argument
3077 if (TREE_READONLY (p
)
3078 && !TREE_ADDRESSABLE (p
)
3079 && value
&& !TREE_SIDE_EFFECTS (value
)
3082 /* We may produce non-gimple trees by adding NOPs or introduce
3083 invalid sharing when operand is not really constant.
3084 It is not big deal to prohibit constant propagation here as
3085 we will constant propagate in DOM1 pass anyway. */
3086 if (is_gimple_min_invariant (value
)
3087 && useless_type_conversion_p (TREE_TYPE (p
),
3089 /* We have to be very careful about ADDR_EXPR. Make sure
3090 the base variable isn't a local variable of the inlined
3091 function, e.g., when doing recursive inlining, direct or
3092 mutually-recursive or whatever, which is why we don't
3093 just test whether fn == current_function_decl. */
3094 && ! self_inlining_addr_expr (value
, fn
))
3096 insert_decl_map (id
, p
, value
);
3097 insert_debug_decl_map (id
, p
, var
);
3098 return insert_init_debug_bind (id
, bb
, var
, value
, NULL
);
3102 /* Register the VAR_DECL as the equivalent for the PARM_DECL;
3103 that way, when the PARM_DECL is encountered, it will be
3104 automatically replaced by the VAR_DECL. */
3105 insert_decl_map (id
, p
, var
);
3107 /* Even if P was TREE_READONLY, the new VAR should not be.
3108 In the original code, we would have constructed a
3109 temporary, and then the function body would have never
3110 changed the value of P. However, now, we will be
3111 constructing VAR directly. The constructor body may
3112 change its value multiple times as it is being
3113 constructed. Therefore, it must not be TREE_READONLY;
3114 the back-end assumes that TREE_READONLY variable is
3115 assigned to only once. */
3116 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (p
)))
3117 TREE_READONLY (var
) = 0;
3119 /* If there is no setup required and we are in SSA, take the easy route
3120 replacing all SSA names representing the function parameter by the
3121 SSA name passed to function.
3123 We need to construct map for the variable anyway as it might be used
3124 in different SSA names when parameter is set in function.
3126 Do replacement at -O0 for const arguments replaced by constant.
3127 This is important for builtin_constant_p and other construct requiring
3128 constant argument to be visible in inlined function body. */
3129 if (gimple_in_ssa_p (cfun
) && rhs
&& def
&& is_gimple_reg (p
)
3131 || (TREE_READONLY (p
)
3132 && is_gimple_min_invariant (rhs
)))
3133 && (TREE_CODE (rhs
) == SSA_NAME
3134 || is_gimple_min_invariant (rhs
))
3135 && !SSA_NAME_OCCURS_IN_ABNORMAL_PHI (def
))
3137 insert_decl_map (id
, def
, rhs
);
3138 return insert_init_debug_bind (id
, bb
, var
, rhs
, NULL
);
3141 /* If the value of argument is never used, don't care about initializing
3143 if (optimize
&& gimple_in_ssa_p (cfun
) && !def
&& is_gimple_reg (p
))
3145 gcc_assert (!value
|| !TREE_SIDE_EFFECTS (value
));
3146 return insert_init_debug_bind (id
, bb
, var
, rhs
, NULL
);
3149 /* Initialize this VAR_DECL from the equivalent argument. Convert
3150 the argument to the proper type in case it was promoted. */
3153 if (rhs
== error_mark_node
)
3155 insert_decl_map (id
, p
, var
);
3156 return insert_init_debug_bind (id
, bb
, var
, rhs
, NULL
);
3159 STRIP_USELESS_TYPE_CONVERSION (rhs
);
3161 /* If we are in SSA form properly remap the default definition
3162 or assign to a dummy SSA name if the parameter is unused and
3163 we are not optimizing. */
3164 if (gimple_in_ssa_p (cfun
) && is_gimple_reg (p
))
3168 def
= remap_ssa_name (def
, id
);
3169 init_stmt
= gimple_build_assign (def
, rhs
);
3170 SSA_NAME_IS_DEFAULT_DEF (def
) = 0;
3171 set_ssa_default_def (cfun
, var
, NULL
);
3175 def
= make_ssa_name (var
);
3176 init_stmt
= gimple_build_assign (def
, rhs
);
3180 init_stmt
= gimple_build_assign (var
, rhs
);
3182 if (bb
&& init_stmt
)
3183 insert_init_stmt (id
, bb
, init_stmt
);
3188 /* Generate code to initialize the parameters of the function at the
3189 top of the stack in ID from the GIMPLE_CALL STMT. */
3192 initialize_inlined_parameters (copy_body_data
*id
, gimple
*stmt
,
3193 tree fn
, basic_block bb
)
3198 tree vars
= NULL_TREE
;
3199 tree static_chain
= gimple_call_chain (stmt
);
3201 /* Figure out what the parameters are. */
3202 parms
= DECL_ARGUMENTS (fn
);
3204 /* Loop through the parameter declarations, replacing each with an
3205 equivalent VAR_DECL, appropriately initialized. */
3206 for (p
= parms
, i
= 0; p
; p
= DECL_CHAIN (p
), i
++)
3209 val
= i
< gimple_call_num_args (stmt
) ? gimple_call_arg (stmt
, i
) : NULL
;
3210 setup_one_parameter (id
, p
, val
, fn
, bb
, &vars
);
3212 /* After remapping parameters remap their types. This has to be done
3213 in a second loop over all parameters to appropriately remap
3214 variable sized arrays when the size is specified in a
3215 parameter following the array. */
3216 for (p
= parms
, i
= 0; p
; p
= DECL_CHAIN (p
), i
++)
3218 tree
*varp
= id
->decl_map
->get (p
);
3219 if (varp
&& VAR_P (*varp
))
3221 tree def
= (gimple_in_ssa_p (cfun
) && is_gimple_reg (p
)
3222 ? ssa_default_def (id
->src_cfun
, p
) : NULL
);
3224 TREE_TYPE (var
) = remap_type (TREE_TYPE (var
), id
);
3225 /* Also remap the default definition if it was remapped
3226 to the default definition of the parameter replacement
3227 by the parameter setup. */
3230 tree
*defp
= id
->decl_map
->get (def
);
3232 && TREE_CODE (*defp
) == SSA_NAME
3233 && SSA_NAME_VAR (*defp
) == var
)
3234 TREE_TYPE (*defp
) = TREE_TYPE (var
);
3239 /* Initialize the static chain. */
3240 p
= DECL_STRUCT_FUNCTION (fn
)->static_chain_decl
;
3241 gcc_assert (fn
!= current_function_decl
);
3244 /* No static chain? Seems like a bug in tree-nested.c. */
3245 gcc_assert (static_chain
);
3247 setup_one_parameter (id
, p
, static_chain
, fn
, bb
, &vars
);
3250 declare_inline_vars (id
->block
, vars
);
3254 /* Declare a return variable to replace the RESULT_DECL for the
3255 function we are calling. An appropriate DECL_STMT is returned.
3256 The USE_STMT is filled to contain a use of the declaration to
3257 indicate the return value of the function.
3259 RETURN_SLOT, if non-null is place where to store the result. It
3260 is set only for CALL_EXPR_RETURN_SLOT_OPT. MODIFY_DEST, if non-null,
3261 was the LHS of the MODIFY_EXPR to which this call is the RHS.
3263 The return value is a (possibly null) value that holds the result
3264 as seen by the caller. */
3267 declare_return_variable (copy_body_data
*id
, tree return_slot
, tree modify_dest
,
3268 basic_block entry_bb
)
3270 tree callee
= id
->src_fn
;
3271 tree result
= DECL_RESULT (callee
);
3272 tree callee_type
= TREE_TYPE (result
);
3276 /* Handle type-mismatches in the function declaration return type
3277 vs. the call expression. */
3279 caller_type
= TREE_TYPE (modify_dest
);
3281 caller_type
= TREE_TYPE (TREE_TYPE (callee
));
3283 /* We don't need to do anything for functions that don't return anything. */
3284 if (VOID_TYPE_P (callee_type
))
3287 /* If there was a return slot, then the return value is the
3288 dereferenced address of that object. */
3291 /* The front end shouldn't have used both return_slot and
3292 a modify expression. */
3293 gcc_assert (!modify_dest
);
3294 if (DECL_BY_REFERENCE (result
))
3296 tree return_slot_addr
= build_fold_addr_expr (return_slot
);
3297 STRIP_USELESS_TYPE_CONVERSION (return_slot_addr
);
3299 /* We are going to construct *&return_slot and we can't do that
3300 for variables believed to be not addressable.
3302 FIXME: This check possibly can match, because values returned
3303 via return slot optimization are not believed to have address
3304 taken by alias analysis. */
3305 gcc_assert (TREE_CODE (return_slot
) != SSA_NAME
);
3306 var
= return_slot_addr
;
3311 gcc_assert (TREE_CODE (var
) != SSA_NAME
);
3312 if (TREE_ADDRESSABLE (result
))
3313 mark_addressable (var
);
3315 if ((TREE_CODE (TREE_TYPE (result
)) == COMPLEX_TYPE
3316 || TREE_CODE (TREE_TYPE (result
)) == VECTOR_TYPE
)
3317 && !DECL_GIMPLE_REG_P (result
)
3319 DECL_GIMPLE_REG_P (var
) = 0;
3324 /* All types requiring non-trivial constructors should have been handled. */
3325 gcc_assert (!TREE_ADDRESSABLE (callee_type
));
3327 /* Attempt to avoid creating a new temporary variable. */
3329 && TREE_CODE (modify_dest
) != SSA_NAME
)
3331 bool use_it
= false;
3333 /* We can't use MODIFY_DEST if there's type promotion involved. */
3334 if (!useless_type_conversion_p (callee_type
, caller_type
))
3337 /* ??? If we're assigning to a variable sized type, then we must
3338 reuse the destination variable, because we've no good way to
3339 create variable sized temporaries at this point. */
3340 else if (TREE_CODE (TYPE_SIZE_UNIT (caller_type
)) != INTEGER_CST
)
3343 /* If the callee cannot possibly modify MODIFY_DEST, then we can
3344 reuse it as the result of the call directly. Don't do this if
3345 it would promote MODIFY_DEST to addressable. */
3346 else if (TREE_ADDRESSABLE (result
))
3350 tree base_m
= get_base_address (modify_dest
);
3352 /* If the base isn't a decl, then it's a pointer, and we don't
3353 know where that's going to go. */
3354 if (!DECL_P (base_m
))
3356 else if (is_global_var (base_m
))
3358 else if ((TREE_CODE (TREE_TYPE (result
)) == COMPLEX_TYPE
3359 || TREE_CODE (TREE_TYPE (result
)) == VECTOR_TYPE
)
3360 && !DECL_GIMPLE_REG_P (result
)
3361 && DECL_GIMPLE_REG_P (base_m
))
3363 else if (!TREE_ADDRESSABLE (base_m
))
3375 gcc_assert (TREE_CODE (TYPE_SIZE_UNIT (callee_type
)) == INTEGER_CST
);
3377 var
= copy_result_decl_to_var (result
, id
);
3378 DECL_SEEN_IN_BIND_EXPR_P (var
) = 1;
3380 /* Do not have the rest of GCC warn about this variable as it should
3381 not be visible to the user. */
3382 TREE_NO_WARNING (var
) = 1;
3384 declare_inline_vars (id
->block
, var
);
3386 /* Build the use expr. If the return type of the function was
3387 promoted, convert it back to the expected type. */
3389 if (!useless_type_conversion_p (caller_type
, TREE_TYPE (var
)))
3391 /* If we can match up types by promotion/demotion do so. */
3392 if (fold_convertible_p (caller_type
, var
))
3393 use
= fold_convert (caller_type
, var
);
3396 /* ??? For valid programs we should not end up here.
3397 Still if we end up with truly mismatched types here, fall back
3398 to using a MEM_REF to not leak invalid GIMPLE to the following
3400 /* Prevent var from being written into SSA form. */
3401 if (TREE_CODE (TREE_TYPE (var
)) == VECTOR_TYPE
3402 || TREE_CODE (TREE_TYPE (var
)) == COMPLEX_TYPE
)
3403 DECL_GIMPLE_REG_P (var
) = false;
3404 else if (is_gimple_reg_type (TREE_TYPE (var
)))
3405 TREE_ADDRESSABLE (var
) = true;
3406 use
= fold_build2 (MEM_REF
, caller_type
,
3407 build_fold_addr_expr (var
),
3408 build_int_cst (ptr_type_node
, 0));
3412 STRIP_USELESS_TYPE_CONVERSION (use
);
3414 if (DECL_BY_REFERENCE (result
))
3416 TREE_ADDRESSABLE (var
) = 1;
3417 var
= build_fold_addr_expr (var
);
3421 /* Register the VAR_DECL as the equivalent for the RESULT_DECL; that
3422 way, when the RESULT_DECL is encountered, it will be
3423 automatically replaced by the VAR_DECL.
3425 When returning by reference, ensure that RESULT_DECL remaps to
3427 if (DECL_BY_REFERENCE (result
)
3428 && !is_gimple_val (var
))
3430 tree temp
= create_tmp_var (TREE_TYPE (result
), "retvalptr");
3431 insert_decl_map (id
, result
, temp
);
3432 /* When RESULT_DECL is in SSA form, we need to remap and initialize
3433 it's default_def SSA_NAME. */
3434 if (gimple_in_ssa_p (id
->src_cfun
)
3435 && is_gimple_reg (result
))
3437 temp
= make_ssa_name (temp
);
3438 insert_decl_map (id
, ssa_default_def (id
->src_cfun
, result
), temp
);
3440 insert_init_stmt (id
, entry_bb
, gimple_build_assign (temp
, var
));
3443 insert_decl_map (id
, result
, var
);
3445 /* Remember this so we can ignore it in remap_decls. */
3450 /* Determine if the function can be copied. If so return NULL. If
3451 not return a string describng the reason for failure. */
3454 copy_forbidden (struct function
*fun
)
3456 const char *reason
= fun
->cannot_be_copied_reason
;
3458 /* Only examine the function once. */
3459 if (fun
->cannot_be_copied_set
)
3462 /* We cannot copy a function that receives a non-local goto
3463 because we cannot remap the destination label used in the
3464 function that is performing the non-local goto. */
3465 /* ??? Actually, this should be possible, if we work at it.
3466 No doubt there's just a handful of places that simply
3467 assume it doesn't happen and don't substitute properly. */
3468 if (fun
->has_nonlocal_label
)
3470 reason
= G_("function %q+F can never be copied "
3471 "because it receives a non-local goto");
3475 if (fun
->has_forced_label_in_static
)
3477 reason
= G_("function %q+F can never be copied because it saves "
3478 "address of local label in a static variable");
3483 fun
->cannot_be_copied_reason
= reason
;
3484 fun
->cannot_be_copied_set
= true;
3489 static const char *inline_forbidden_reason
;
3491 /* A callback for walk_gimple_seq to handle statements. Returns non-null
3492 iff a function can not be inlined. Also sets the reason why. */
3495 inline_forbidden_p_stmt (gimple_stmt_iterator
*gsi
, bool *handled_ops_p
,
3496 struct walk_stmt_info
*wip
)
3498 tree fn
= (tree
) wip
->info
;
3500 gimple
*stmt
= gsi_stmt (*gsi
);
3502 switch (gimple_code (stmt
))
3505 /* Refuse to inline alloca call unless user explicitly forced so as
3506 this may change program's memory overhead drastically when the
3507 function using alloca is called in loop. In GCC present in
3508 SPEC2000 inlining into schedule_block cause it to require 2GB of
3509 RAM instead of 256MB. Don't do so for alloca calls emitted for
3510 VLA objects as those can't cause unbounded growth (they're always
3511 wrapped inside stack_save/stack_restore regions. */
3512 if (gimple_maybe_alloca_call_p (stmt
)
3513 && !gimple_call_alloca_for_var_p (as_a
<gcall
*> (stmt
))
3514 && !lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn
)))
3516 inline_forbidden_reason
3517 = G_("function %q+F can never be inlined because it uses "
3518 "alloca (override using the always_inline attribute)");
3519 *handled_ops_p
= true;
3523 t
= gimple_call_fndecl (stmt
);
3527 /* We cannot inline functions that call setjmp. */
3528 if (setjmp_call_p (t
))
3530 inline_forbidden_reason
3531 = G_("function %q+F can never be inlined because it uses setjmp");
3532 *handled_ops_p
= true;
3536 if (DECL_BUILT_IN_CLASS (t
) == BUILT_IN_NORMAL
)
3537 switch (DECL_FUNCTION_CODE (t
))
3539 /* We cannot inline functions that take a variable number of
3541 case BUILT_IN_VA_START
:
3542 case BUILT_IN_NEXT_ARG
:
3543 case BUILT_IN_VA_END
:
3544 inline_forbidden_reason
3545 = G_("function %q+F can never be inlined because it "
3546 "uses variable argument lists");
3547 *handled_ops_p
= true;
3550 case BUILT_IN_LONGJMP
:
3551 /* We can't inline functions that call __builtin_longjmp at
3552 all. The non-local goto machinery really requires the
3553 destination be in a different function. If we allow the
3554 function calling __builtin_longjmp to be inlined into the
3555 function calling __builtin_setjmp, Things will Go Awry. */
3556 inline_forbidden_reason
3557 = G_("function %q+F can never be inlined because "
3558 "it uses setjmp-longjmp exception handling");
3559 *handled_ops_p
= true;
3562 case BUILT_IN_NONLOCAL_GOTO
:
3564 inline_forbidden_reason
3565 = G_("function %q+F can never be inlined because "
3566 "it uses non-local goto");
3567 *handled_ops_p
= true;
3570 case BUILT_IN_RETURN
:
3571 case BUILT_IN_APPLY_ARGS
:
3572 /* If a __builtin_apply_args caller would be inlined,
3573 it would be saving arguments of the function it has
3574 been inlined into. Similarly __builtin_return would
3575 return from the function the inline has been inlined into. */
3576 inline_forbidden_reason
3577 = G_("function %q+F can never be inlined because "
3578 "it uses __builtin_return or __builtin_apply_args");
3579 *handled_ops_p
= true;
3588 t
= gimple_goto_dest (stmt
);
3590 /* We will not inline a function which uses computed goto. The
3591 addresses of its local labels, which may be tucked into
3592 global storage, are of course not constant across
3593 instantiations, which causes unexpected behavior. */
3594 if (TREE_CODE (t
) != LABEL_DECL
)
3596 inline_forbidden_reason
3597 = G_("function %q+F can never be inlined "
3598 "because it contains a computed goto");
3599 *handled_ops_p
= true;
3608 *handled_ops_p
= false;
3612 /* Return true if FNDECL is a function that cannot be inlined into
3616 inline_forbidden_p (tree fndecl
)
3618 struct function
*fun
= DECL_STRUCT_FUNCTION (fndecl
);
3619 struct walk_stmt_info wi
;
3621 bool forbidden_p
= false;
3623 /* First check for shared reasons not to copy the code. */
3624 inline_forbidden_reason
= copy_forbidden (fun
);
3625 if (inline_forbidden_reason
!= NULL
)
3628 /* Next, walk the statements of the function looking for
3629 constraucts we can't handle, or are non-optimal for inlining. */
3630 hash_set
<tree
> visited_nodes
;
3631 memset (&wi
, 0, sizeof (wi
));
3632 wi
.info
= (void *) fndecl
;
3633 wi
.pset
= &visited_nodes
;
3635 FOR_EACH_BB_FN (bb
, fun
)
3638 gimple_seq seq
= bb_seq (bb
);
3639 ret
= walk_gimple_seq (seq
, inline_forbidden_p_stmt
, NULL
, &wi
);
3640 forbidden_p
= (ret
!= NULL
);
3648 /* Return false if the function FNDECL cannot be inlined on account of its
3649 attributes, true otherwise. */
3651 function_attribute_inlinable_p (const_tree fndecl
)
3653 if (targetm
.attribute_table
)
3657 for (a
= DECL_ATTRIBUTES (fndecl
); a
; a
= TREE_CHAIN (a
))
3659 const_tree name
= TREE_PURPOSE (a
);
3662 for (i
= 0; targetm
.attribute_table
[i
].name
!= NULL
; i
++)
3663 if (is_attribute_p (targetm
.attribute_table
[i
].name
, name
))
3664 return targetm
.function_attribute_inlinable_p (fndecl
);
3671 /* Returns nonzero if FN is a function that does not have any
3672 fundamental inline blocking properties. */
3675 tree_inlinable_function_p (tree fn
)
3677 bool inlinable
= true;
3681 /* If we've already decided this function shouldn't be inlined,
3682 there's no need to check again. */
3683 if (DECL_UNINLINABLE (fn
))
3686 /* We only warn for functions declared `inline' by the user. */
3687 do_warning
= (warn_inline
3688 && DECL_DECLARED_INLINE_P (fn
)
3689 && !DECL_NO_INLINE_WARNING_P (fn
)
3690 && !DECL_IN_SYSTEM_HEADER (fn
));
3692 always_inline
= lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn
));
3695 && always_inline
== NULL
)
3698 warning (OPT_Winline
, "function %q+F can never be inlined because it "
3699 "is suppressed using -fno-inline", fn
);
3703 else if (!function_attribute_inlinable_p (fn
))
3706 warning (OPT_Winline
, "function %q+F can never be inlined because it "
3707 "uses attributes conflicting with inlining", fn
);
3711 else if (inline_forbidden_p (fn
))
3713 /* See if we should warn about uninlinable functions. Previously,
3714 some of these warnings would be issued while trying to expand
3715 the function inline, but that would cause multiple warnings
3716 about functions that would for example call alloca. But since
3717 this a property of the function, just one warning is enough.
3718 As a bonus we can now give more details about the reason why a
3719 function is not inlinable. */
3721 error (inline_forbidden_reason
, fn
);
3722 else if (do_warning
)
3723 warning (OPT_Winline
, inline_forbidden_reason
, fn
);
3728 /* Squirrel away the result so that we don't have to check again. */
3729 DECL_UNINLINABLE (fn
) = !inlinable
;
3734 /* Estimate the cost of a memory move of type TYPE. Use machine dependent
3735 word size and take possible memcpy call into account and return
3736 cost based on whether optimizing for size or speed according to SPEED_P. */
3739 estimate_move_cost (tree type
, bool ARG_UNUSED (speed_p
))
3743 gcc_assert (!VOID_TYPE_P (type
));
3745 if (TREE_CODE (type
) == VECTOR_TYPE
)
3747 scalar_mode inner
= SCALAR_TYPE_MODE (TREE_TYPE (type
));
3748 machine_mode simd
= targetm
.vectorize
.preferred_simd_mode (inner
);
3750 = estimated_poly_value (GET_MODE_SIZE (TYPE_MODE (type
)));
3751 int simd_mode_size
= estimated_poly_value (GET_MODE_SIZE (simd
));
3752 return ((orig_mode_size
+ simd_mode_size
- 1)
3756 size
= int_size_in_bytes (type
);
3758 if (size
< 0 || size
> MOVE_MAX_PIECES
* MOVE_RATIO (speed_p
))
3759 /* Cost of a memcpy call, 3 arguments and the call. */
3762 return ((size
+ MOVE_MAX_PIECES
- 1) / MOVE_MAX_PIECES
);
3765 /* Returns cost of operation CODE, according to WEIGHTS */
3768 estimate_operator_cost (enum tree_code code
, eni_weights
*weights
,
3769 tree op1 ATTRIBUTE_UNUSED
, tree op2
)
3773 /* These are "free" conversions, or their presumed cost
3774 is folded into other operations. */
3779 case VIEW_CONVERT_EXPR
:
3782 /* Assign cost of 1 to usual operations.
3783 ??? We may consider mapping RTL costs to this. */
3789 case POINTER_PLUS_EXPR
:
3790 case POINTER_DIFF_EXPR
:
3793 case MULT_HIGHPART_EXPR
:
3795 case ADDR_SPACE_CONVERT_EXPR
:
3796 case FIXED_CONVERT_EXPR
:
3797 case FIX_TRUNC_EXPR
:
3816 case TRUTH_ANDIF_EXPR
:
3817 case TRUTH_ORIF_EXPR
:
3818 case TRUTH_AND_EXPR
:
3820 case TRUTH_XOR_EXPR
:
3821 case TRUTH_NOT_EXPR
:
3830 case UNORDERED_EXPR
:
3841 case PREDECREMENT_EXPR
:
3842 case PREINCREMENT_EXPR
:
3843 case POSTDECREMENT_EXPR
:
3844 case POSTINCREMENT_EXPR
:
3846 case REALIGN_LOAD_EXPR
:
3848 case WIDEN_SUM_EXPR
:
3849 case WIDEN_MULT_EXPR
:
3852 case WIDEN_MULT_PLUS_EXPR
:
3853 case WIDEN_MULT_MINUS_EXPR
:
3854 case WIDEN_LSHIFT_EXPR
:
3856 case VEC_WIDEN_MULT_HI_EXPR
:
3857 case VEC_WIDEN_MULT_LO_EXPR
:
3858 case VEC_WIDEN_MULT_EVEN_EXPR
:
3859 case VEC_WIDEN_MULT_ODD_EXPR
:
3860 case VEC_UNPACK_HI_EXPR
:
3861 case VEC_UNPACK_LO_EXPR
:
3862 case VEC_UNPACK_FLOAT_HI_EXPR
:
3863 case VEC_UNPACK_FLOAT_LO_EXPR
:
3864 case VEC_UNPACK_FIX_TRUNC_HI_EXPR
:
3865 case VEC_UNPACK_FIX_TRUNC_LO_EXPR
:
3866 case VEC_PACK_TRUNC_EXPR
:
3867 case VEC_PACK_SAT_EXPR
:
3868 case VEC_PACK_FIX_TRUNC_EXPR
:
3869 case VEC_PACK_FLOAT_EXPR
:
3870 case VEC_WIDEN_LSHIFT_HI_EXPR
:
3871 case VEC_WIDEN_LSHIFT_LO_EXPR
:
3872 case VEC_DUPLICATE_EXPR
:
3873 case VEC_SERIES_EXPR
:
3877 /* Few special cases of expensive operations. This is useful
3878 to avoid inlining on functions having too many of these. */
3879 case TRUNC_DIV_EXPR
:
3881 case FLOOR_DIV_EXPR
:
3882 case ROUND_DIV_EXPR
:
3883 case EXACT_DIV_EXPR
:
3884 case TRUNC_MOD_EXPR
:
3886 case FLOOR_MOD_EXPR
:
3887 case ROUND_MOD_EXPR
:
3889 if (TREE_CODE (op2
) != INTEGER_CST
)
3890 return weights
->div_mod_cost
;
3893 /* Bit-field insertion needs several shift and mask operations. */
3894 case BIT_INSERT_EXPR
:
3898 /* We expect a copy assignment with no operator. */
3899 gcc_assert (get_gimple_rhs_class (code
) == GIMPLE_SINGLE_RHS
);
3905 /* Estimate number of instructions that will be created by expanding
3906 the statements in the statement sequence STMTS.
3907 WEIGHTS contains weights attributed to various constructs. */
3910 estimate_num_insns_seq (gimple_seq stmts
, eni_weights
*weights
)
3913 gimple_stmt_iterator gsi
;
3916 for (gsi
= gsi_start (stmts
); !gsi_end_p (gsi
); gsi_next (&gsi
))
3917 cost
+= estimate_num_insns (gsi_stmt (gsi
), weights
);
3923 /* Estimate number of instructions that will be created by expanding STMT.
3924 WEIGHTS contains weights attributed to various constructs. */
3927 estimate_num_insns (gimple
*stmt
, eni_weights
*weights
)
3930 enum gimple_code code
= gimple_code (stmt
);
3937 /* Try to estimate the cost of assignments. We have three cases to
3939 1) Simple assignments to registers;
3940 2) Stores to things that must live in memory. This includes
3941 "normal" stores to scalars, but also assignments of large
3942 structures, or constructors of big arrays;
3944 Let us look at the first two cases, assuming we have "a = b + C":
3945 <GIMPLE_ASSIGN <var_decl "a">
3946 <plus_expr <var_decl "b"> <constant C>>
3947 If "a" is a GIMPLE register, the assignment to it is free on almost
3948 any target, because "a" usually ends up in a real register. Hence
3949 the only cost of this expression comes from the PLUS_EXPR, and we
3950 can ignore the GIMPLE_ASSIGN.
3951 If "a" is not a GIMPLE register, the assignment to "a" will most
3952 likely be a real store, so the cost of the GIMPLE_ASSIGN is the cost
3953 of moving something into "a", which we compute using the function
3954 estimate_move_cost. */
3955 if (gimple_clobber_p (stmt
))
3956 return 0; /* ={v} {CLOBBER} stmt expands to nothing. */
3958 lhs
= gimple_assign_lhs (stmt
);
3959 rhs
= gimple_assign_rhs1 (stmt
);
3963 /* Account for the cost of moving to / from memory. */
3964 if (gimple_store_p (stmt
))
3965 cost
+= estimate_move_cost (TREE_TYPE (lhs
), weights
->time_based
);
3966 if (gimple_assign_load_p (stmt
))
3967 cost
+= estimate_move_cost (TREE_TYPE (rhs
), weights
->time_based
);
3969 cost
+= estimate_operator_cost (gimple_assign_rhs_code (stmt
), weights
,
3970 gimple_assign_rhs1 (stmt
),
3971 get_gimple_rhs_class (gimple_assign_rhs_code (stmt
))
3972 == GIMPLE_BINARY_RHS
3973 ? gimple_assign_rhs2 (stmt
) : NULL
);
3977 cost
= 1 + estimate_operator_cost (gimple_cond_code (stmt
), weights
,
3978 gimple_op (stmt
, 0),
3979 gimple_op (stmt
, 1));
3984 gswitch
*switch_stmt
= as_a
<gswitch
*> (stmt
);
3985 /* Take into account cost of the switch + guess 2 conditional jumps for
3988 TODO: once the switch expansion logic is sufficiently separated, we can
3989 do better job on estimating cost of the switch. */
3990 if (weights
->time_based
)
3991 cost
= floor_log2 (gimple_switch_num_labels (switch_stmt
)) * 2;
3993 cost
= gimple_switch_num_labels (switch_stmt
) * 2;
4001 if (gimple_call_internal_p (stmt
))
4003 else if ((decl
= gimple_call_fndecl (stmt
))
4004 && DECL_BUILT_IN (decl
))
4006 /* Do not special case builtins where we see the body.
4007 This just confuse inliner. */
4008 struct cgraph_node
*node
;
4009 if (!(node
= cgraph_node::get (decl
))
4010 || node
->definition
)
4012 /* For buitins that are likely expanded to nothing or
4013 inlined do not account operand costs. */
4014 else if (is_simple_builtin (decl
))
4016 else if (is_inexpensive_builtin (decl
))
4017 return weights
->target_builtin_call_cost
;
4018 else if (gimple_call_builtin_p (stmt
, BUILT_IN_NORMAL
))
4020 /* We canonicalize x * x to pow (x, 2.0) with -ffast-math, so
4021 specialize the cheap expansion we do here.
4022 ??? This asks for a more general solution. */
4023 switch (DECL_FUNCTION_CODE (decl
))
4028 if (TREE_CODE (gimple_call_arg (stmt
, 1)) == REAL_CST
4030 (&TREE_REAL_CST (gimple_call_arg (stmt
, 1)),
4032 return estimate_operator_cost
4033 (MULT_EXPR
, weights
, gimple_call_arg (stmt
, 0),
4034 gimple_call_arg (stmt
, 0));
4043 cost
= decl
? weights
->call_cost
: weights
->indirect_call_cost
;
4044 if (gimple_call_lhs (stmt
))
4045 cost
+= estimate_move_cost (TREE_TYPE (gimple_call_lhs (stmt
)),
4046 weights
->time_based
);
4047 for (i
= 0; i
< gimple_call_num_args (stmt
); i
++)
4049 tree arg
= gimple_call_arg (stmt
, i
);
4050 cost
+= estimate_move_cost (TREE_TYPE (arg
),
4051 weights
->time_based
);
4057 return weights
->return_cost
;
4063 case GIMPLE_PREDICT
:
4069 int count
= asm_str_count (gimple_asm_string (as_a
<gasm
*> (stmt
)));
4070 /* 1000 means infinity. This avoids overflows later
4071 with very long asm statements. */
4074 return MAX (1, count
);
4078 /* This is either going to be an external function call with one
4079 argument, or two register copy statements plus a goto. */
4082 case GIMPLE_EH_DISPATCH
:
4083 /* ??? This is going to turn into a switch statement. Ideally
4084 we'd have a look at the eh region and estimate the number of
4089 return estimate_num_insns_seq (
4090 gimple_bind_body (as_a
<gbind
*> (stmt
)),
4093 case GIMPLE_EH_FILTER
:
4094 return estimate_num_insns_seq (gimple_eh_filter_failure (stmt
), weights
);
4097 return estimate_num_insns_seq (gimple_catch_handler (
4098 as_a
<gcatch
*> (stmt
)),
4102 return (estimate_num_insns_seq (gimple_try_eval (stmt
), weights
)
4103 + estimate_num_insns_seq (gimple_try_cleanup (stmt
), weights
));
4105 /* OMP directives are generally very expensive. */
4107 case GIMPLE_OMP_RETURN
:
4108 case GIMPLE_OMP_SECTIONS_SWITCH
:
4109 case GIMPLE_OMP_ATOMIC_STORE
:
4110 case GIMPLE_OMP_CONTINUE
:
4111 /* ...except these, which are cheap. */
4114 case GIMPLE_OMP_ATOMIC_LOAD
:
4115 return weights
->omp_cost
;
4117 case GIMPLE_OMP_FOR
:
4118 return (weights
->omp_cost
4119 + estimate_num_insns_seq (gimple_omp_body (stmt
), weights
)
4120 + estimate_num_insns_seq (gimple_omp_for_pre_body (stmt
), weights
));
4122 case GIMPLE_OMP_PARALLEL
:
4123 case GIMPLE_OMP_TASK
:
4124 case GIMPLE_OMP_CRITICAL
:
4125 case GIMPLE_OMP_MASTER
:
4126 case GIMPLE_OMP_TASKGROUP
:
4127 case GIMPLE_OMP_ORDERED
:
4128 case GIMPLE_OMP_SECTION
:
4129 case GIMPLE_OMP_SECTIONS
:
4130 case GIMPLE_OMP_SINGLE
:
4131 case GIMPLE_OMP_TARGET
:
4132 case GIMPLE_OMP_TEAMS
:
4133 return (weights
->omp_cost
4134 + estimate_num_insns_seq (gimple_omp_body (stmt
), weights
));
4136 case GIMPLE_TRANSACTION
:
4137 return (weights
->tm_cost
4138 + estimate_num_insns_seq (gimple_transaction_body (
4139 as_a
<gtransaction
*> (stmt
)),
4149 /* Estimate number of instructions that will be created by expanding
4150 function FNDECL. WEIGHTS contains weights attributed to various
4154 estimate_num_insns_fn (tree fndecl
, eni_weights
*weights
)
4156 struct function
*my_function
= DECL_STRUCT_FUNCTION (fndecl
);
4157 gimple_stmt_iterator bsi
;
4161 gcc_assert (my_function
&& my_function
->cfg
);
4162 FOR_EACH_BB_FN (bb
, my_function
)
4164 for (bsi
= gsi_start_bb (bb
); !gsi_end_p (bsi
); gsi_next (&bsi
))
4165 n
+= estimate_num_insns (gsi_stmt (bsi
), weights
);
4172 /* Initializes weights used by estimate_num_insns. */
4175 init_inline_once (void)
4177 eni_size_weights
.call_cost
= 1;
4178 eni_size_weights
.indirect_call_cost
= 3;
4179 eni_size_weights
.target_builtin_call_cost
= 1;
4180 eni_size_weights
.div_mod_cost
= 1;
4181 eni_size_weights
.omp_cost
= 40;
4182 eni_size_weights
.tm_cost
= 10;
4183 eni_size_weights
.time_based
= false;
4184 eni_size_weights
.return_cost
= 1;
4186 /* Estimating time for call is difficult, since we have no idea what the
4187 called function does. In the current uses of eni_time_weights,
4188 underestimating the cost does less harm than overestimating it, so
4189 we choose a rather small value here. */
4190 eni_time_weights
.call_cost
= 10;
4191 eni_time_weights
.indirect_call_cost
= 15;
4192 eni_time_weights
.target_builtin_call_cost
= 1;
4193 eni_time_weights
.div_mod_cost
= 10;
4194 eni_time_weights
.omp_cost
= 40;
4195 eni_time_weights
.tm_cost
= 40;
4196 eni_time_weights
.time_based
= true;
4197 eni_time_weights
.return_cost
= 2;
4201 /* Install new lexical TREE_BLOCK underneath 'current_block'. */
4204 prepend_lexical_block (tree current_block
, tree new_block
)
4206 BLOCK_CHAIN (new_block
) = BLOCK_SUBBLOCKS (current_block
);
4207 BLOCK_SUBBLOCKS (current_block
) = new_block
;
4208 BLOCK_SUPERCONTEXT (new_block
) = current_block
;
4211 /* Add local variables from CALLEE to CALLER. */
4214 add_local_variables (struct function
*callee
, struct function
*caller
,
4220 FOR_EACH_LOCAL_DECL (callee
, ix
, var
)
4221 if (!can_be_nonlocal (var
, id
))
4223 tree new_var
= remap_decl (var
, id
);
4225 /* Remap debug-expressions. */
4227 && DECL_HAS_DEBUG_EXPR_P (var
)
4230 tree tem
= DECL_DEBUG_EXPR (var
);
4231 bool old_regimplify
= id
->regimplify
;
4232 id
->remapping_type_depth
++;
4233 walk_tree (&tem
, copy_tree_body_r
, id
, NULL
);
4234 id
->remapping_type_depth
--;
4235 id
->regimplify
= old_regimplify
;
4236 SET_DECL_DEBUG_EXPR (new_var
, tem
);
4237 DECL_HAS_DEBUG_EXPR_P (new_var
) = 1;
4239 add_local_decl (caller
, new_var
);
4243 /* Add to BINDINGS a debug stmt resetting SRCVAR if inlining might
4244 have brought in or introduced any debug stmts for SRCVAR. */
4247 reset_debug_binding (copy_body_data
*id
, tree srcvar
, gimple_seq
*bindings
)
4249 tree
*remappedvarp
= id
->decl_map
->get (srcvar
);
4254 if (!VAR_P (*remappedvarp
))
4257 if (*remappedvarp
== id
->retvar
|| *remappedvarp
== id
->retbnd
)
4260 tree tvar
= target_for_debug_bind (*remappedvarp
);
4264 gdebug
*stmt
= gimple_build_debug_bind (tvar
, NULL_TREE
,
4266 gimple_seq_add_stmt (bindings
, stmt
);
4269 /* For each inlined variable for which we may have debug bind stmts,
4270 add before GSI a final debug stmt resetting it, marking the end of
4271 its life, so that var-tracking knows it doesn't have to compute
4272 further locations for it. */
4275 reset_debug_bindings (copy_body_data
*id
, gimple_stmt_iterator gsi
)
4279 gimple_seq bindings
= NULL
;
4281 if (!gimple_in_ssa_p (id
->src_cfun
))
4284 if (!opt_for_fn (id
->dst_fn
, flag_var_tracking_assignments
))
4287 for (var
= DECL_ARGUMENTS (id
->src_fn
);
4288 var
; var
= DECL_CHAIN (var
))
4289 reset_debug_binding (id
, var
, &bindings
);
4291 FOR_EACH_LOCAL_DECL (id
->src_cfun
, ix
, var
)
4292 reset_debug_binding (id
, var
, &bindings
);
4294 gsi_insert_seq_before_without_update (&gsi
, bindings
, GSI_SAME_STMT
);
4297 /* If STMT is a GIMPLE_CALL, replace it with its inline expansion. */
4300 expand_call_inline (basic_block bb
, gimple
*stmt
, copy_body_data
*id
)
4304 hash_map
<tree
, tree
> *dst
;
4305 hash_map
<tree
, tree
> *st
= NULL
;
4308 struct cgraph_edge
*cg_edge
;
4309 cgraph_inline_failed_t reason
;
4310 basic_block return_block
;
4312 gimple_stmt_iterator gsi
, stmt_gsi
;
4313 bool successfully_inlined
= false;
4314 bool purge_dead_abnormal_edges
;
4316 unsigned int prop_mask
, src_properties
;
4317 struct function
*dst_cfun
;
4320 gimple
*simtenter_stmt
= NULL
;
4321 vec
<tree
> *simtvars_save
;
4323 /* The gimplifier uses input_location in too many places, such as
4324 internal_get_tmp_var (). */
4325 location_t saved_location
= input_location
;
4326 input_location
= gimple_location (stmt
);
4328 /* From here on, we're only interested in CALL_EXPRs. */
4329 call_stmt
= dyn_cast
<gcall
*> (stmt
);
4333 cg_edge
= id
->dst_node
->get_edge (stmt
);
4334 gcc_checking_assert (cg_edge
);
4335 /* First, see if we can figure out what function is being called.
4336 If we cannot, then there is no hope of inlining the function. */
4337 if (cg_edge
->indirect_unknown_callee
)
4339 fn
= cg_edge
->callee
->decl
;
4340 gcc_checking_assert (fn
);
4342 /* If FN is a declaration of a function in a nested scope that was
4343 globally declared inline, we don't set its DECL_INITIAL.
4344 However, we can't blindly follow DECL_ABSTRACT_ORIGIN because the
4345 C++ front-end uses it for cdtors to refer to their internal
4346 declarations, that are not real functions. Fortunately those
4347 don't have trees to be saved, so we can tell by checking their
4349 if (!DECL_INITIAL (fn
)
4350 && DECL_ABSTRACT_ORIGIN (fn
)
4351 && gimple_has_body_p (DECL_ABSTRACT_ORIGIN (fn
)))
4352 fn
= DECL_ABSTRACT_ORIGIN (fn
);
4354 /* Don't try to inline functions that are not well-suited to inlining. */
4355 if (cg_edge
->inline_failed
)
4357 reason
= cg_edge
->inline_failed
;
4358 /* If this call was originally indirect, we do not want to emit any
4359 inlining related warnings or sorry messages because there are no
4360 guarantees regarding those. */
4361 if (cg_edge
->indirect_inlining_edge
)
4364 if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn
))
4365 /* For extern inline functions that get redefined we always
4366 silently ignored always_inline flag. Better behavior would
4367 be to be able to keep both bodies and use extern inline body
4368 for inlining, but we can't do that because frontends overwrite
4370 && !cg_edge
->callee
->local
.redefined_extern_inline
4371 /* During early inline pass, report only when optimization is
4373 && (symtab
->global_info_ready
4375 || cgraph_inline_failed_type (reason
) == CIF_FINAL_ERROR
)
4376 /* PR 20090218-1_0.c. Body can be provided by another module. */
4377 && (reason
!= CIF_BODY_NOT_AVAILABLE
|| !flag_generate_lto
))
4379 error ("inlining failed in call to always_inline %q+F: %s", fn
,
4380 cgraph_inline_failed_string (reason
));
4381 if (gimple_location (stmt
) != UNKNOWN_LOCATION
)
4382 inform (gimple_location (stmt
), "called from here");
4383 else if (DECL_SOURCE_LOCATION (cfun
->decl
) != UNKNOWN_LOCATION
)
4384 inform (DECL_SOURCE_LOCATION (cfun
->decl
),
4385 "called from this function");
4387 else if (warn_inline
4388 && DECL_DECLARED_INLINE_P (fn
)
4389 && !DECL_NO_INLINE_WARNING_P (fn
)
4390 && !DECL_IN_SYSTEM_HEADER (fn
)
4391 && reason
!= CIF_UNSPECIFIED
4392 && !lookup_attribute ("noinline", DECL_ATTRIBUTES (fn
))
4393 /* Do not warn about not inlined recursive calls. */
4394 && !cg_edge
->recursive_p ()
4395 /* Avoid warnings during early inline pass. */
4396 && symtab
->global_info_ready
)
4398 if (warning (OPT_Winline
, "inlining failed in call to %q+F: %s",
4399 fn
, _(cgraph_inline_failed_string (reason
))))
4401 if (gimple_location (stmt
) != UNKNOWN_LOCATION
)
4402 inform (gimple_location (stmt
), "called from here");
4403 else if (DECL_SOURCE_LOCATION (cfun
->decl
) != UNKNOWN_LOCATION
)
4404 inform (DECL_SOURCE_LOCATION (cfun
->decl
),
4405 "called from this function");
4410 id
->src_node
= cg_edge
->callee
;
4412 /* If callee is thunk, all we need is to adjust the THIS pointer
4413 and redirect to function being thunked. */
4414 if (id
->src_node
->thunk
.thunk_p
)
4417 tree virtual_offset
= NULL
;
4418 profile_count count
= cg_edge
->count
;
4420 gimple_stmt_iterator iter
= gsi_for_stmt (stmt
);
4423 edge
= id
->src_node
->callees
->clone (id
->dst_node
, call_stmt
,
4425 profile_count::one (),
4426 profile_count::one (),
4428 edge
->count
= count
;
4429 if (id
->src_node
->thunk
.virtual_offset_p
)
4430 virtual_offset
= size_int (id
->src_node
->thunk
.virtual_value
);
4431 op
= create_tmp_reg_fn (cfun
, TREE_TYPE (gimple_call_arg (stmt
, 0)),
4433 gsi_insert_before (&iter
, gimple_build_assign (op
,
4434 gimple_call_arg (stmt
, 0)),
4436 gcc_assert (id
->src_node
->thunk
.this_adjusting
);
4437 op
= thunk_adjust (&iter
, op
, 1, id
->src_node
->thunk
.fixed_offset
,
4440 gimple_call_set_arg (stmt
, 0, op
);
4441 gimple_call_set_fndecl (stmt
, edge
->callee
->decl
);
4443 id
->src_node
->remove ();
4444 expand_call_inline (bb
, stmt
, id
);
4445 maybe_remove_unused_call_args (cfun
, stmt
);
4448 fn
= cg_edge
->callee
->decl
;
4449 cg_edge
->callee
->get_untransformed_body ();
4451 if (flag_checking
&& cg_edge
->callee
->decl
!= id
->dst_node
->decl
)
4452 cg_edge
->callee
->verify ();
4454 /* We will be inlining this callee. */
4455 id
->eh_lp_nr
= lookup_stmt_eh_lp (stmt
);
4456 id
->assign_stmts
.create (0);
4458 /* Update the callers EH personality. */
4459 if (DECL_FUNCTION_PERSONALITY (cg_edge
->callee
->decl
))
4460 DECL_FUNCTION_PERSONALITY (cg_edge
->caller
->decl
)
4461 = DECL_FUNCTION_PERSONALITY (cg_edge
->callee
->decl
);
4463 /* Split the block before the GIMPLE_CALL. */
4464 stmt_gsi
= gsi_for_stmt (stmt
);
4465 gsi_prev (&stmt_gsi
);
4466 e
= split_block (bb
, gsi_end_p (stmt_gsi
) ? NULL
: gsi_stmt (stmt_gsi
));
4468 return_block
= e
->dest
;
4471 /* If the GIMPLE_CALL was in the last statement of BB, it may have
4472 been the source of abnormal edges. In this case, schedule
4473 the removal of dead abnormal edges. */
4474 gsi
= gsi_start_bb (return_block
);
4476 purge_dead_abnormal_edges
= gsi_end_p (gsi
);
4478 stmt_gsi
= gsi_start_bb (return_block
);
4480 /* Build a block containing code to initialize the arguments, the
4481 actual inline expansion of the body, and a label for the return
4482 statements within the function to jump to. The type of the
4483 statement expression is the return type of the function call.
4484 ??? If the call does not have an associated block then we will
4485 remap all callee blocks to NULL, effectively dropping most of
4486 its debug information. This should only happen for calls to
4487 artificial decls inserted by the compiler itself. We need to
4488 either link the inlined blocks into the caller block tree or
4489 not refer to them in any way to not break GC for locations. */
4490 if (gimple_block (stmt
))
4492 id
->block
= make_node (BLOCK
);
4493 BLOCK_ABSTRACT_ORIGIN (id
->block
) = fn
;
4494 BLOCK_SOURCE_LOCATION (id
->block
)
4495 = LOCATION_LOCUS (gimple_location (stmt
));
4496 prepend_lexical_block (gimple_block (stmt
), id
->block
);
4499 /* Local declarations will be replaced by their equivalents in this
4502 id
->decl_map
= new hash_map
<tree
, tree
>;
4503 dst
= id
->debug_map
;
4504 id
->debug_map
= NULL
;
4506 /* Record the function we are about to inline. */
4508 id
->src_cfun
= DECL_STRUCT_FUNCTION (fn
);
4509 id
->call_stmt
= call_stmt
;
4511 /* When inlining into an OpenMP SIMD-on-SIMT loop, arrange for new automatic
4512 variables to be added to IFN_GOMP_SIMT_ENTER argument list. */
4513 dst_cfun
= DECL_STRUCT_FUNCTION (id
->dst_fn
);
4514 simtvars_save
= id
->dst_simt_vars
;
4515 if (!(dst_cfun
->curr_properties
& PROP_gimple_lomp_dev
)
4516 && (simduid
= bb
->loop_father
->simduid
) != NULL_TREE
4517 && (simduid
= ssa_default_def (dst_cfun
, simduid
)) != NULL_TREE
4518 && single_imm_use (simduid
, &use
, &simtenter_stmt
)
4519 && is_gimple_call (simtenter_stmt
)
4520 && gimple_call_internal_p (simtenter_stmt
, IFN_GOMP_SIMT_ENTER
))
4521 vec_alloc (id
->dst_simt_vars
, 0);
4523 id
->dst_simt_vars
= NULL
;
4525 if (profile_status_for_fn (id
->src_cfun
) == PROFILE_ABSENT
)
4526 profile_status_for_fn (dst_cfun
) = PROFILE_ABSENT
;
4528 /* If the src function contains an IFN_VA_ARG, then so will the dst
4529 function after inlining. Likewise for IFN_GOMP_USE_SIMT. */
4530 prop_mask
= PROP_gimple_lva
| PROP_gimple_lomp_dev
;
4531 src_properties
= id
->src_cfun
->curr_properties
& prop_mask
;
4532 if (src_properties
!= prop_mask
)
4533 dst_cfun
->curr_properties
&= src_properties
| ~prop_mask
;
4535 gcc_assert (!id
->src_cfun
->after_inlining
);
4538 if (lookup_attribute ("cold", DECL_ATTRIBUTES (fn
)))
4540 gimple_stmt_iterator si
= gsi_last_bb (bb
);
4541 gsi_insert_after (&si
, gimple_build_predict (PRED_COLD_FUNCTION
,
4545 initialize_inlined_parameters (id
, stmt
, fn
, bb
);
4546 if (debug_nonbind_markers_p
&& debug_inline_points
&& id
->block
4547 && inlined_function_outer_scope_p (id
->block
))
4549 gimple_stmt_iterator si
= gsi_last_bb (bb
);
4550 gsi_insert_after (&si
, gimple_build_debug_inline_entry
4551 (id
->block
, input_location
), GSI_NEW_STMT
);
4554 if (DECL_INITIAL (fn
))
4556 if (gimple_block (stmt
))
4560 prepend_lexical_block (id
->block
,
4561 remap_blocks (DECL_INITIAL (fn
), id
));
4562 gcc_checking_assert (BLOCK_SUBBLOCKS (id
->block
)
4563 && (BLOCK_CHAIN (BLOCK_SUBBLOCKS (id
->block
))
4565 /* Move vars for PARM_DECLs from DECL_INITIAL block to id->block,
4566 otherwise for DWARF DW_TAG_formal_parameter will not be children of
4567 DW_TAG_inlined_subroutine, but of a DW_TAG_lexical_block
4568 under it. The parameters can be then evaluated in the debugger,
4569 but don't show in backtraces. */
4570 for (var
= &BLOCK_VARS (BLOCK_SUBBLOCKS (id
->block
)); *var
; )
4571 if (TREE_CODE (DECL_ORIGIN (*var
)) == PARM_DECL
)
4574 *var
= TREE_CHAIN (v
);
4575 TREE_CHAIN (v
) = BLOCK_VARS (id
->block
);
4576 BLOCK_VARS (id
->block
) = v
;
4579 var
= &TREE_CHAIN (*var
);
4582 remap_blocks_to_null (DECL_INITIAL (fn
), id
);
4585 /* Return statements in the function body will be replaced by jumps
4586 to the RET_LABEL. */
4587 gcc_assert (DECL_INITIAL (fn
));
4588 gcc_assert (TREE_CODE (DECL_INITIAL (fn
)) == BLOCK
);
4590 /* Find the LHS to which the result of this call is assigned. */
4592 if (gimple_call_lhs (stmt
))
4594 modify_dest
= gimple_call_lhs (stmt
);
4596 /* The function which we are inlining might not return a value,
4597 in which case we should issue a warning that the function
4598 does not return a value. In that case the optimizers will
4599 see that the variable to which the value is assigned was not
4600 initialized. We do not want to issue a warning about that
4601 uninitialized variable. */
4602 if (DECL_P (modify_dest
))
4603 TREE_NO_WARNING (modify_dest
) = 1;
4605 if (gimple_call_return_slot_opt_p (call_stmt
))
4607 return_slot
= modify_dest
;
4614 /* If we are inlining a call to the C++ operator new, we don't want
4615 to use type based alias analysis on the return value. Otherwise
4616 we may get confused if the compiler sees that the inlined new
4617 function returns a pointer which was just deleted. See bug
4619 if (DECL_IS_OPERATOR_NEW (fn
))
4625 /* Declare the return variable for the function. */
4626 use_retvar
= declare_return_variable (id
, return_slot
, modify_dest
, bb
);
4628 /* Add local vars in this inlined callee to caller. */
4629 add_local_variables (id
->src_cfun
, cfun
, id
);
4631 if (dump_file
&& (dump_flags
& TDF_DETAILS
))
4633 fprintf (dump_file
, "Inlining %s to %s with frequency %4.2f\n",
4634 id
->src_node
->dump_name (),
4635 id
->dst_node
->dump_name (),
4636 cg_edge
->sreal_frequency ().to_double ());
4637 id
->src_node
->dump (dump_file
);
4638 id
->dst_node
->dump (dump_file
);
4641 /* This is it. Duplicate the callee body. Assume callee is
4642 pre-gimplified. Note that we must not alter the caller
4643 function in any way before this point, as this CALL_EXPR may be
4644 a self-referential call; if we're calling ourselves, we need to
4645 duplicate our body before altering anything. */
4646 copy_body (id
, bb
, return_block
, NULL
);
4648 reset_debug_bindings (id
, stmt_gsi
);
4650 if (flag_stack_reuse
!= SR_NONE
)
4651 for (tree p
= DECL_ARGUMENTS (id
->src_fn
); p
; p
= DECL_CHAIN (p
))
4652 if (!TREE_THIS_VOLATILE (p
))
4654 tree
*varp
= id
->decl_map
->get (p
);
4655 if (varp
&& VAR_P (*varp
) && !is_gimple_reg (*varp
))
4657 tree clobber
= build_constructor (TREE_TYPE (*varp
), NULL
);
4658 gimple
*clobber_stmt
;
4659 TREE_THIS_VOLATILE (clobber
) = 1;
4660 clobber_stmt
= gimple_build_assign (*varp
, clobber
);
4661 gimple_set_location (clobber_stmt
, gimple_location (stmt
));
4662 gsi_insert_before (&stmt_gsi
, clobber_stmt
, GSI_SAME_STMT
);
4666 /* Reset the escaped solution. */
4667 if (cfun
->gimple_df
)
4668 pt_solution_reset (&cfun
->gimple_df
->escaped
);
4670 /* Add new automatic variables to IFN_GOMP_SIMT_ENTER arguments. */
4671 if (id
->dst_simt_vars
&& id
->dst_simt_vars
->length () > 0)
4673 size_t nargs
= gimple_call_num_args (simtenter_stmt
);
4674 vec
<tree
> *vars
= id
->dst_simt_vars
;
4675 auto_vec
<tree
> newargs (nargs
+ vars
->length ());
4676 for (size_t i
= 0; i
< nargs
; i
++)
4677 newargs
.quick_push (gimple_call_arg (simtenter_stmt
, i
));
4678 for (tree
*pvar
= vars
->begin (); pvar
!= vars
->end (); pvar
++)
4680 tree ptrtype
= build_pointer_type (TREE_TYPE (*pvar
));
4681 newargs
.quick_push (build1 (ADDR_EXPR
, ptrtype
, *pvar
));
4683 gcall
*g
= gimple_build_call_internal_vec (IFN_GOMP_SIMT_ENTER
, newargs
);
4684 gimple_call_set_lhs (g
, gimple_call_lhs (simtenter_stmt
));
4685 gimple_stmt_iterator gsi
= gsi_for_stmt (simtenter_stmt
);
4686 gsi_replace (&gsi
, g
, false);
4688 vec_free (id
->dst_simt_vars
);
4689 id
->dst_simt_vars
= simtvars_save
;
4694 delete id
->debug_map
;
4695 id
->debug_map
= dst
;
4697 delete id
->decl_map
;
4700 /* Unlink the calls virtual operands before replacing it. */
4701 unlink_stmt_vdef (stmt
);
4702 if (gimple_vdef (stmt
)
4703 && TREE_CODE (gimple_vdef (stmt
)) == SSA_NAME
)
4704 release_ssa_name (gimple_vdef (stmt
));
4706 /* If the inlined function returns a result that we care about,
4707 substitute the GIMPLE_CALL with an assignment of the return
4708 variable to the LHS of the call. That is, if STMT was
4709 'a = foo (...)', substitute the call with 'a = USE_RETVAR'. */
4710 if (use_retvar
&& gimple_call_lhs (stmt
))
4712 gimple
*old_stmt
= stmt
;
4713 stmt
= gimple_build_assign (gimple_call_lhs (stmt
), use_retvar
);
4714 gsi_replace (&stmt_gsi
, stmt
, false);
4715 maybe_clean_or_replace_eh_stmt (old_stmt
, stmt
);
4716 /* Append a clobber for id->retvar if easily possible. */
4717 if (flag_stack_reuse
!= SR_NONE
4719 && VAR_P (id
->retvar
)
4720 && id
->retvar
!= return_slot
4721 && id
->retvar
!= modify_dest
4722 && !TREE_THIS_VOLATILE (id
->retvar
)
4723 && !is_gimple_reg (id
->retvar
)
4724 && !stmt_ends_bb_p (stmt
))
4726 tree clobber
= build_constructor (TREE_TYPE (id
->retvar
), NULL
);
4727 gimple
*clobber_stmt
;
4728 TREE_THIS_VOLATILE (clobber
) = 1;
4729 clobber_stmt
= gimple_build_assign (id
->retvar
, clobber
);
4730 gimple_set_location (clobber_stmt
, gimple_location (old_stmt
));
4731 gsi_insert_after (&stmt_gsi
, clobber_stmt
, GSI_SAME_STMT
);
4736 /* Handle the case of inlining a function with no return
4737 statement, which causes the return value to become undefined. */
4738 if (gimple_call_lhs (stmt
)
4739 && TREE_CODE (gimple_call_lhs (stmt
)) == SSA_NAME
)
4741 tree name
= gimple_call_lhs (stmt
);
4742 tree var
= SSA_NAME_VAR (name
);
4743 tree def
= var
? ssa_default_def (cfun
, var
) : NULL
;
4747 /* If the variable is used undefined, make this name
4748 undefined via a move. */
4749 stmt
= gimple_build_assign (gimple_call_lhs (stmt
), def
);
4750 gsi_replace (&stmt_gsi
, stmt
, true);
4756 var
= create_tmp_reg_fn (cfun
, TREE_TYPE (name
), NULL
);
4757 SET_SSA_NAME_VAR_OR_IDENTIFIER (name
, var
);
4759 /* Otherwise make this variable undefined. */
4760 gsi_remove (&stmt_gsi
, true);
4761 set_ssa_default_def (cfun
, var
, name
);
4762 SSA_NAME_DEF_STMT (name
) = gimple_build_nop ();
4765 /* Replace with a clobber for id->retvar. */
4766 else if (flag_stack_reuse
!= SR_NONE
4768 && VAR_P (id
->retvar
)
4769 && id
->retvar
!= return_slot
4770 && id
->retvar
!= modify_dest
4771 && !TREE_THIS_VOLATILE (id
->retvar
)
4772 && !is_gimple_reg (id
->retvar
))
4774 tree clobber
= build_constructor (TREE_TYPE (id
->retvar
), NULL
);
4775 gimple
*clobber_stmt
;
4776 TREE_THIS_VOLATILE (clobber
) = 1;
4777 clobber_stmt
= gimple_build_assign (id
->retvar
, clobber
);
4778 gimple_set_location (clobber_stmt
, gimple_location (stmt
));
4779 gsi_replace (&stmt_gsi
, clobber_stmt
, false);
4780 maybe_clean_or_replace_eh_stmt (stmt
, clobber_stmt
);
4783 gsi_remove (&stmt_gsi
, true);
4786 if (purge_dead_abnormal_edges
)
4788 gimple_purge_dead_eh_edges (return_block
);
4789 gimple_purge_dead_abnormal_call_edges (return_block
);
4792 /* If the value of the new expression is ignored, that's OK. We
4793 don't warn about this for CALL_EXPRs, so we shouldn't warn about
4794 the equivalent inlined version either. */
4795 if (is_gimple_assign (stmt
))
4797 gcc_assert (gimple_assign_single_p (stmt
)
4798 || CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (stmt
)));
4799 TREE_USED (gimple_assign_rhs1 (stmt
)) = 1;
4802 id
->assign_stmts
.release ();
4804 /* Output the inlining info for this abstract function, since it has been
4805 inlined. If we don't do this now, we can lose the information about the
4806 variables in the function when the blocks get blown away as soon as we
4807 remove the cgraph node. */
4808 if (gimple_block (stmt
))
4809 (*debug_hooks
->outlining_inline_function
) (cg_edge
->callee
->decl
);
4811 /* Update callgraph if needed. */
4812 cg_edge
->callee
->remove ();
4814 id
->block
= NULL_TREE
;
4815 id
->retvar
= NULL_TREE
;
4816 id
->retbnd
= NULL_TREE
;
4817 successfully_inlined
= true;
4820 input_location
= saved_location
;
4821 return successfully_inlined
;
4824 /* Expand call statements reachable from STMT_P.
4825 We can only have CALL_EXPRs as the "toplevel" tree code or nested
4826 in a MODIFY_EXPR. */
4829 gimple_expand_calls_inline (basic_block bb
, copy_body_data
*id
)
4831 gimple_stmt_iterator gsi
;
4832 bool inlined
= false;
4834 for (gsi
= gsi_last_bb (bb
); !gsi_end_p (gsi
);)
4836 gimple
*stmt
= gsi_stmt (gsi
);
4839 if (is_gimple_call (stmt
)
4840 && !gimple_call_internal_p (stmt
))
4841 inlined
|= expand_call_inline (bb
, stmt
, id
);
4848 /* Walk all basic blocks created after FIRST and try to fold every statement
4849 in the STATEMENTS pointer set. */
4852 fold_marked_statements (int first
, hash_set
<gimple
*> *statements
)
4854 for (; first
< n_basic_blocks_for_fn (cfun
); first
++)
4855 if (BASIC_BLOCK_FOR_FN (cfun
, first
))
4857 gimple_stmt_iterator gsi
;
4859 for (gsi
= gsi_start_bb (BASIC_BLOCK_FOR_FN (cfun
, first
));
4862 if (statements
->contains (gsi_stmt (gsi
)))
4864 gimple
*old_stmt
= gsi_stmt (gsi
);
4865 tree old_decl
= is_gimple_call (old_stmt
) ? gimple_call_fndecl (old_stmt
) : 0;
4867 if (old_decl
&& DECL_BUILT_IN (old_decl
))
4869 /* Folding builtins can create multiple instructions,
4870 we need to look at all of them. */
4871 gimple_stmt_iterator i2
= gsi
;
4873 if (fold_stmt (&gsi
))
4876 /* If a builtin at the end of a bb folded into nothing,
4877 the following loop won't work. */
4878 if (gsi_end_p (gsi
))
4880 cgraph_update_edges_for_call_stmt (old_stmt
,
4885 i2
= gsi_start_bb (BASIC_BLOCK_FOR_FN (cfun
, first
));
4890 new_stmt
= gsi_stmt (i2
);
4891 update_stmt (new_stmt
);
4892 cgraph_update_edges_for_call_stmt (old_stmt
, old_decl
,
4895 if (new_stmt
== gsi_stmt (gsi
))
4897 /* It is okay to check only for the very last
4898 of these statements. If it is a throwing
4899 statement nothing will change. If it isn't
4900 this can remove EH edges. If that weren't
4901 correct then because some intermediate stmts
4902 throw, but not the last one. That would mean
4903 we'd have to split the block, which we can't
4904 here and we'd loose anyway. And as builtins
4905 probably never throw, this all
4907 if (maybe_clean_or_replace_eh_stmt (old_stmt
,
4909 gimple_purge_dead_eh_edges (
4910 BASIC_BLOCK_FOR_FN (cfun
, first
));
4917 else if (fold_stmt (&gsi
))
4919 /* Re-read the statement from GSI as fold_stmt() may
4921 gimple
*new_stmt
= gsi_stmt (gsi
);
4922 update_stmt (new_stmt
);
4924 if (is_gimple_call (old_stmt
)
4925 || is_gimple_call (new_stmt
))
4926 cgraph_update_edges_for_call_stmt (old_stmt
, old_decl
,
4929 if (maybe_clean_or_replace_eh_stmt (old_stmt
, new_stmt
))
4930 gimple_purge_dead_eh_edges (BASIC_BLOCK_FOR_FN (cfun
,
4937 /* Expand calls to inline functions in the body of FN. */
4940 optimize_inline_calls (tree fn
)
4944 int last
= n_basic_blocks_for_fn (cfun
);
4945 bool inlined_p
= false;
4948 memset (&id
, 0, sizeof (id
));
4950 id
.src_node
= id
.dst_node
= cgraph_node::get (fn
);
4951 gcc_assert (id
.dst_node
->definition
);
4953 /* Or any functions that aren't finished yet. */
4954 if (current_function_decl
)
4955 id
.dst_fn
= current_function_decl
;
4957 id
.copy_decl
= copy_decl_maybe_to_var
;
4958 id
.transform_call_graph_edges
= CB_CGE_DUPLICATE
;
4959 id
.transform_new_cfg
= false;
4960 id
.transform_return_to_modify
= true;
4961 id
.transform_parameter
= true;
4962 id
.transform_lang_insert_block
= NULL
;
4963 id
.statements_to_fold
= new hash_set
<gimple
*>;
4965 push_gimplify_context ();
4967 /* We make no attempts to keep dominance info up-to-date. */
4968 free_dominance_info (CDI_DOMINATORS
);
4969 free_dominance_info (CDI_POST_DOMINATORS
);
4971 /* Register specific gimple functions. */
4972 gimple_register_cfg_hooks ();
4974 /* Reach the trees by walking over the CFG, and note the
4975 enclosing basic-blocks in the call edges. */
4976 /* We walk the blocks going forward, because inlined function bodies
4977 will split id->current_basic_block, and the new blocks will
4978 follow it; we'll trudge through them, processing their CALL_EXPRs
4980 FOR_EACH_BB_FN (bb
, cfun
)
4981 inlined_p
|= gimple_expand_calls_inline (bb
, &id
);
4983 pop_gimplify_context (NULL
);
4987 struct cgraph_edge
*e
;
4989 id
.dst_node
->verify ();
4991 /* Double check that we inlined everything we are supposed to inline. */
4992 for (e
= id
.dst_node
->callees
; e
; e
= e
->next_callee
)
4993 gcc_assert (e
->inline_failed
);
4996 /* Fold queued statements. */
4997 update_max_bb_count ();
4998 fold_marked_statements (last
, id
.statements_to_fold
);
4999 delete id
.statements_to_fold
;
5001 gcc_assert (!id
.debug_stmts
.exists ());
5003 /* If we didn't inline into the function there is nothing to do. */
5007 /* Renumber the lexical scoping (non-code) blocks consecutively. */
5010 delete_unreachable_blocks_update_callgraph (&id
);
5012 id
.dst_node
->verify ();
5014 /* It would be nice to check SSA/CFG/statement consistency here, but it is
5015 not possible yet - the IPA passes might make various functions to not
5016 throw and they don't care to proactively update local EH info. This is
5017 done later in fixup_cfg pass that also execute the verification. */
5018 return (TODO_update_ssa
5020 | (gimple_in_ssa_p (cfun
) ? TODO_remove_unused_locals
: 0)
5021 | (gimple_in_ssa_p (cfun
) ? TODO_update_address_taken
: 0)
5022 | (profile_status_for_fn (cfun
) != PROFILE_ABSENT
5023 ? TODO_rebuild_frequencies
: 0));
5026 /* Passed to walk_tree. Copies the node pointed to, if appropriate. */
5029 copy_tree_r (tree
*tp
, int *walk_subtrees
, void *data ATTRIBUTE_UNUSED
)
5031 enum tree_code code
= TREE_CODE (*tp
);
5032 enum tree_code_class cl
= TREE_CODE_CLASS (code
);
5034 /* We make copies of most nodes. */
5035 if (IS_EXPR_CODE_CLASS (cl
)
5036 || code
== TREE_LIST
5038 || code
== TYPE_DECL
5039 || code
== OMP_CLAUSE
)
5041 /* Because the chain gets clobbered when we make a copy, we save it
5043 tree chain
= NULL_TREE
, new_tree
;
5045 if (CODE_CONTAINS_STRUCT (code
, TS_COMMON
))
5046 chain
= TREE_CHAIN (*tp
);
5048 /* Copy the node. */
5049 new_tree
= copy_node (*tp
);
5053 /* Now, restore the chain, if appropriate. That will cause
5054 walk_tree to walk into the chain as well. */
5055 if (code
== PARM_DECL
5056 || code
== TREE_LIST
5057 || code
== OMP_CLAUSE
)
5058 TREE_CHAIN (*tp
) = chain
;
5060 /* For now, we don't update BLOCKs when we make copies. So, we
5061 have to nullify all BIND_EXPRs. */
5062 if (TREE_CODE (*tp
) == BIND_EXPR
)
5063 BIND_EXPR_BLOCK (*tp
) = NULL_TREE
;
5065 else if (code
== CONSTRUCTOR
)
5067 /* CONSTRUCTOR nodes need special handling because
5068 we need to duplicate the vector of elements. */
5071 new_tree
= copy_node (*tp
);
5072 CONSTRUCTOR_ELTS (new_tree
) = vec_safe_copy (CONSTRUCTOR_ELTS (*tp
));
5075 else if (code
== STATEMENT_LIST
)
5076 /* We used to just abort on STATEMENT_LIST, but we can run into them
5077 with statement-expressions (c++/40975). */
5078 copy_statement_list (tp
);
5079 else if (TREE_CODE_CLASS (code
) == tcc_type
)
5081 else if (TREE_CODE_CLASS (code
) == tcc_declaration
)
5083 else if (TREE_CODE_CLASS (code
) == tcc_constant
)
5088 /* The SAVE_EXPR pointed to by TP is being copied. If ST contains
5089 information indicating to what new SAVE_EXPR this one should be mapped,
5090 use that one. Otherwise, create a new node and enter it in ST. FN is
5091 the function into which the copy will be placed. */
5094 remap_save_expr (tree
*tp
, hash_map
<tree
, tree
> *st
, int *walk_subtrees
)
5099 /* See if we already encountered this SAVE_EXPR. */
5102 /* If we didn't already remap this SAVE_EXPR, do so now. */
5105 t
= copy_node (*tp
);
5107 /* Remember this SAVE_EXPR. */
5109 /* Make sure we don't remap an already-remapped SAVE_EXPR. */
5114 /* We've already walked into this SAVE_EXPR; don't do it again. */
5119 /* Replace this SAVE_EXPR with the copy. */
5123 /* Called via walk_gimple_seq. If *GSIP points to a GIMPLE_LABEL for a local
5124 label, copies the declaration and enters it in the splay_tree in DATA (which
5125 is really a 'copy_body_data *'. */
5128 mark_local_labels_stmt (gimple_stmt_iterator
*gsip
,
5129 bool *handled_ops_p ATTRIBUTE_UNUSED
,
5130 struct walk_stmt_info
*wi
)
5132 copy_body_data
*id
= (copy_body_data
*) wi
->info
;
5133 glabel
*stmt
= dyn_cast
<glabel
*> (gsi_stmt (*gsip
));
5137 tree decl
= gimple_label_label (stmt
);
5139 /* Copy the decl and remember the copy. */
5140 insert_decl_map (id
, decl
, id
->copy_decl (decl
, id
));
5146 static gimple_seq
duplicate_remap_omp_clause_seq (gimple_seq seq
,
5147 struct walk_stmt_info
*wi
);
5149 /* Called via walk_gimple_seq by copy_gimple_seq_and_replace_local.
5150 Using the splay_tree pointed to by ST (which is really a `splay_tree'),
5151 remaps all local declarations to appropriate replacements in gimple
5155 replace_locals_op (tree
*tp
, int *walk_subtrees
, void *data
)
5157 struct walk_stmt_info
*wi
= (struct walk_stmt_info
*) data
;
5158 copy_body_data
*id
= (copy_body_data
*) wi
->info
;
5159 hash_map
<tree
, tree
> *st
= id
->decl_map
;
5163 /* For recursive invocations this is no longer the LHS itself. */
5164 bool is_lhs
= wi
->is_lhs
;
5167 if (TREE_CODE (expr
) == SSA_NAME
)
5169 *tp
= remap_ssa_name (*tp
, id
);
5172 SSA_NAME_DEF_STMT (*tp
) = gsi_stmt (wi
->gsi
);
5174 /* Only a local declaration (variable or label). */
5175 else if ((VAR_P (expr
) && !TREE_STATIC (expr
))
5176 || TREE_CODE (expr
) == LABEL_DECL
)
5178 /* Lookup the declaration. */
5181 /* If it's there, remap it. */
5186 else if (TREE_CODE (expr
) == STATEMENT_LIST
5187 || TREE_CODE (expr
) == BIND_EXPR
5188 || TREE_CODE (expr
) == SAVE_EXPR
)
5190 else if (TREE_CODE (expr
) == TARGET_EXPR
)
5192 /* Don't mess with a TARGET_EXPR that hasn't been expanded.
5193 It's OK for this to happen if it was part of a subtree that
5194 isn't immediately expanded, such as operand 2 of another
5196 if (!TREE_OPERAND (expr
, 1))
5198 TREE_OPERAND (expr
, 1) = TREE_OPERAND (expr
, 3);
5199 TREE_OPERAND (expr
, 3) = NULL_TREE
;
5202 else if (TREE_CODE (expr
) == OMP_CLAUSE
)
5204 /* Before the omplower pass completes, some OMP clauses can contain
5205 sequences that are neither copied by gimple_seq_copy nor walked by
5206 walk_gimple_seq. To make copy_gimple_seq_and_replace_locals work even
5207 in those situations, we have to copy and process them explicitely. */
5209 if (OMP_CLAUSE_CODE (expr
) == OMP_CLAUSE_LASTPRIVATE
)
5211 gimple_seq seq
= OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (expr
);
5212 seq
= duplicate_remap_omp_clause_seq (seq
, wi
);
5213 OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (expr
) = seq
;
5215 else if (OMP_CLAUSE_CODE (expr
) == OMP_CLAUSE_LINEAR
)
5217 gimple_seq seq
= OMP_CLAUSE_LINEAR_GIMPLE_SEQ (expr
);
5218 seq
= duplicate_remap_omp_clause_seq (seq
, wi
);
5219 OMP_CLAUSE_LINEAR_GIMPLE_SEQ (expr
) = seq
;
5221 else if (OMP_CLAUSE_CODE (expr
) == OMP_CLAUSE_REDUCTION
)
5223 gimple_seq seq
= OMP_CLAUSE_REDUCTION_GIMPLE_INIT (expr
);
5224 seq
= duplicate_remap_omp_clause_seq (seq
, wi
);
5225 OMP_CLAUSE_REDUCTION_GIMPLE_INIT (expr
) = seq
;
5226 seq
= OMP_CLAUSE_REDUCTION_GIMPLE_MERGE (expr
);
5227 seq
= duplicate_remap_omp_clause_seq (seq
, wi
);
5228 OMP_CLAUSE_REDUCTION_GIMPLE_MERGE (expr
) = seq
;
5232 /* Keep iterating. */
5237 /* Called via walk_gimple_seq by copy_gimple_seq_and_replace_local.
5238 Using the splay_tree pointed to by ST (which is really a `splay_tree'),
5239 remaps all local declarations to appropriate replacements in gimple
5243 replace_locals_stmt (gimple_stmt_iterator
*gsip
,
5244 bool *handled_ops_p ATTRIBUTE_UNUSED
,
5245 struct walk_stmt_info
*wi
)
5247 copy_body_data
*id
= (copy_body_data
*) wi
->info
;
5248 gimple
*gs
= gsi_stmt (*gsip
);
5250 if (gbind
*stmt
= dyn_cast
<gbind
*> (gs
))
5252 tree block
= gimple_bind_block (stmt
);
5256 remap_block (&block
, id
);
5257 gimple_bind_set_block (stmt
, block
);
5260 /* This will remap a lot of the same decls again, but this should be
5262 if (gimple_bind_vars (stmt
))
5264 tree old_var
, decls
= gimple_bind_vars (stmt
);
5266 for (old_var
= decls
; old_var
; old_var
= DECL_CHAIN (old_var
))
5267 if (!can_be_nonlocal (old_var
, id
)
5268 && ! variably_modified_type_p (TREE_TYPE (old_var
), id
->src_fn
))
5269 remap_decl (old_var
, id
);
5271 gcc_checking_assert (!id
->prevent_decl_creation_for_types
);
5272 id
->prevent_decl_creation_for_types
= true;
5273 gimple_bind_set_vars (stmt
, remap_decls (decls
, NULL
, id
));
5274 id
->prevent_decl_creation_for_types
= false;
5278 /* Keep iterating. */
5282 /* Create a copy of SEQ and remap all decls in it. */
5285 duplicate_remap_omp_clause_seq (gimple_seq seq
, struct walk_stmt_info
*wi
)
5290 /* If there are any labels in OMP sequences, they can be only referred to in
5291 the sequence itself and therefore we can do both here. */
5292 walk_gimple_seq (seq
, mark_local_labels_stmt
, NULL
, wi
);
5293 gimple_seq copy
= gimple_seq_copy (seq
);
5294 walk_gimple_seq (copy
, replace_locals_stmt
, replace_locals_op
, wi
);
5298 /* Copies everything in SEQ and replaces variables and labels local to
5299 current_function_decl. */
5302 copy_gimple_seq_and_replace_locals (gimple_seq seq
)
5305 struct walk_stmt_info wi
;
5308 /* There's nothing to do for NULL_TREE. */
5313 memset (&id
, 0, sizeof (id
));
5314 id
.src_fn
= current_function_decl
;
5315 id
.dst_fn
= current_function_decl
;
5317 id
.decl_map
= new hash_map
<tree
, tree
>;
5318 id
.debug_map
= NULL
;
5320 id
.copy_decl
= copy_decl_no_change
;
5321 id
.transform_call_graph_edges
= CB_CGE_DUPLICATE
;
5322 id
.transform_new_cfg
= false;
5323 id
.transform_return_to_modify
= false;
5324 id
.transform_parameter
= false;
5325 id
.transform_lang_insert_block
= NULL
;
5327 /* Walk the tree once to find local labels. */
5328 memset (&wi
, 0, sizeof (wi
));
5329 hash_set
<tree
> visited
;
5332 walk_gimple_seq (seq
, mark_local_labels_stmt
, NULL
, &wi
);
5334 copy
= gimple_seq_copy (seq
);
5336 /* Walk the copy, remapping decls. */
5337 memset (&wi
, 0, sizeof (wi
));
5339 walk_gimple_seq (copy
, replace_locals_stmt
, replace_locals_op
, &wi
);
5344 delete id
.debug_map
;
5345 if (id
.dependence_map
)
5347 delete id
.dependence_map
;
5348 id
.dependence_map
= NULL
;
5355 /* Allow someone to determine if SEARCH is a child of TOP from gdb. */
5358 debug_find_tree_1 (tree
*tp
, int *walk_subtrees ATTRIBUTE_UNUSED
, void *data
)
5367 debug_find_tree (tree top
, tree search
)
5369 return walk_tree_without_duplicates (&top
, debug_find_tree_1
, search
) != 0;
5373 /* Declare the variables created by the inliner. Add all the variables in
5374 VARS to BIND_EXPR. */
5377 declare_inline_vars (tree block
, tree vars
)
5380 for (t
= vars
; t
; t
= DECL_CHAIN (t
))
5382 DECL_SEEN_IN_BIND_EXPR_P (t
) = 1;
5383 gcc_assert (!TREE_STATIC (t
) && !TREE_ASM_WRITTEN (t
));
5384 add_local_decl (cfun
, t
);
5388 BLOCK_VARS (block
) = chainon (BLOCK_VARS (block
), vars
);
5391 /* Copy NODE (which must be a DECL). The DECL originally was in the FROM_FN,
5392 but now it will be in the TO_FN. PARM_TO_VAR means enable PARM_DECL to
5393 VAR_DECL translation. */
5396 copy_decl_for_dup_finish (copy_body_data
*id
, tree decl
, tree copy
)
5398 /* Don't generate debug information for the copy if we wouldn't have
5399 generated it for the copy either. */
5400 DECL_ARTIFICIAL (copy
) = DECL_ARTIFICIAL (decl
);
5401 DECL_IGNORED_P (copy
) = DECL_IGNORED_P (decl
);
5403 /* Set the DECL_ABSTRACT_ORIGIN so the debugging routines know what
5404 declaration inspired this copy. */
5405 DECL_ABSTRACT_ORIGIN (copy
) = DECL_ORIGIN (decl
);
5407 /* The new variable/label has no RTL, yet. */
5408 if (CODE_CONTAINS_STRUCT (TREE_CODE (copy
), TS_DECL_WRTL
)
5409 && !TREE_STATIC (copy
) && !DECL_EXTERNAL (copy
))
5410 SET_DECL_RTL (copy
, 0);
5412 /* These args would always appear unused, if not for this. */
5413 TREE_USED (copy
) = 1;
5415 /* Set the context for the new declaration. */
5416 if (!DECL_CONTEXT (decl
))
5417 /* Globals stay global. */
5419 else if (DECL_CONTEXT (decl
) != id
->src_fn
)
5420 /* Things that weren't in the scope of the function we're inlining
5421 from aren't in the scope we're inlining to, either. */
5423 else if (TREE_STATIC (decl
))
5424 /* Function-scoped static variables should stay in the original
5429 /* Ordinary automatic local variables are now in the scope of the
5431 DECL_CONTEXT (copy
) = id
->dst_fn
;
5432 if (VAR_P (copy
) && id
->dst_simt_vars
&& !is_gimple_reg (copy
))
5434 if (!lookup_attribute ("omp simt private", DECL_ATTRIBUTES (copy
)))
5435 DECL_ATTRIBUTES (copy
)
5436 = tree_cons (get_identifier ("omp simt private"), NULL
,
5437 DECL_ATTRIBUTES (copy
));
5438 id
->dst_simt_vars
->safe_push (copy
);
5446 copy_decl_to_var (tree decl
, copy_body_data
*id
)
5450 gcc_assert (TREE_CODE (decl
) == PARM_DECL
5451 || TREE_CODE (decl
) == RESULT_DECL
);
5453 type
= TREE_TYPE (decl
);
5455 copy
= build_decl (DECL_SOURCE_LOCATION (id
->dst_fn
),
5456 VAR_DECL
, DECL_NAME (decl
), type
);
5457 if (DECL_PT_UID_SET_P (decl
))
5458 SET_DECL_PT_UID (copy
, DECL_PT_UID (decl
));
5459 TREE_ADDRESSABLE (copy
) = TREE_ADDRESSABLE (decl
);
5460 TREE_READONLY (copy
) = TREE_READONLY (decl
);
5461 TREE_THIS_VOLATILE (copy
) = TREE_THIS_VOLATILE (decl
);
5462 DECL_GIMPLE_REG_P (copy
) = DECL_GIMPLE_REG_P (decl
);
5464 return copy_decl_for_dup_finish (id
, decl
, copy
);
5467 /* Like copy_decl_to_var, but create a return slot object instead of a
5468 pointer variable for return by invisible reference. */
5471 copy_result_decl_to_var (tree decl
, copy_body_data
*id
)
5475 gcc_assert (TREE_CODE (decl
) == PARM_DECL
5476 || TREE_CODE (decl
) == RESULT_DECL
);
5478 type
= TREE_TYPE (decl
);
5479 if (DECL_BY_REFERENCE (decl
))
5480 type
= TREE_TYPE (type
);
5482 copy
= build_decl (DECL_SOURCE_LOCATION (id
->dst_fn
),
5483 VAR_DECL
, DECL_NAME (decl
), type
);
5484 if (DECL_PT_UID_SET_P (decl
))
5485 SET_DECL_PT_UID (copy
, DECL_PT_UID (decl
));
5486 TREE_READONLY (copy
) = TREE_READONLY (decl
);
5487 TREE_THIS_VOLATILE (copy
) = TREE_THIS_VOLATILE (decl
);
5488 if (!DECL_BY_REFERENCE (decl
))
5490 TREE_ADDRESSABLE (copy
) = TREE_ADDRESSABLE (decl
);
5491 DECL_GIMPLE_REG_P (copy
) = DECL_GIMPLE_REG_P (decl
);
5494 return copy_decl_for_dup_finish (id
, decl
, copy
);
5498 copy_decl_no_change (tree decl
, copy_body_data
*id
)
5502 copy
= copy_node (decl
);
5504 /* The COPY is not abstract; it will be generated in DST_FN. */
5505 DECL_ABSTRACT_P (copy
) = false;
5506 lang_hooks
.dup_lang_specific_decl (copy
);
5508 /* TREE_ADDRESSABLE isn't used to indicate that a label's address has
5509 been taken; it's for internal bookkeeping in expand_goto_internal. */
5510 if (TREE_CODE (copy
) == LABEL_DECL
)
5512 TREE_ADDRESSABLE (copy
) = 0;
5513 LABEL_DECL_UID (copy
) = -1;
5516 return copy_decl_for_dup_finish (id
, decl
, copy
);
5520 copy_decl_maybe_to_var (tree decl
, copy_body_data
*id
)
5522 if (TREE_CODE (decl
) == PARM_DECL
|| TREE_CODE (decl
) == RESULT_DECL
)
5523 return copy_decl_to_var (decl
, id
);
5525 return copy_decl_no_change (decl
, id
);
5528 /* Return a copy of the function's argument tree. */
5530 copy_arguments_for_versioning (tree orig_parm
, copy_body_data
* id
,
5531 bitmap args_to_skip
, tree
*vars
)
5534 tree new_parm
= NULL
;
5539 for (arg
= orig_parm
; arg
; arg
= DECL_CHAIN (arg
), i
++)
5540 if (!args_to_skip
|| !bitmap_bit_p (args_to_skip
, i
))
5542 tree new_tree
= remap_decl (arg
, id
);
5543 if (TREE_CODE (new_tree
) != PARM_DECL
)
5544 new_tree
= id
->copy_decl (arg
, id
);
5545 lang_hooks
.dup_lang_specific_decl (new_tree
);
5547 parg
= &DECL_CHAIN (new_tree
);
5549 else if (!id
->decl_map
->get (arg
))
5551 /* Make an equivalent VAR_DECL. If the argument was used
5552 as temporary variable later in function, the uses will be
5553 replaced by local variable. */
5554 tree var
= copy_decl_to_var (arg
, id
);
5555 insert_decl_map (id
, arg
, var
);
5556 /* Declare this new variable. */
5557 DECL_CHAIN (var
) = *vars
;
5563 /* Return a copy of the function's static chain. */
5565 copy_static_chain (tree static_chain
, copy_body_data
* id
)
5567 tree
*chain_copy
, *pvar
;
5569 chain_copy
= &static_chain
;
5570 for (pvar
= chain_copy
; *pvar
; pvar
= &DECL_CHAIN (*pvar
))
5572 tree new_tree
= remap_decl (*pvar
, id
);
5573 lang_hooks
.dup_lang_specific_decl (new_tree
);
5574 DECL_CHAIN (new_tree
) = DECL_CHAIN (*pvar
);
5577 return static_chain
;
5580 /* Return true if the function is allowed to be versioned.
5581 This is a guard for the versioning functionality. */
5584 tree_versionable_function_p (tree fndecl
)
5586 return (!lookup_attribute ("noclone", DECL_ATTRIBUTES (fndecl
))
5587 && copy_forbidden (DECL_STRUCT_FUNCTION (fndecl
)) == NULL
);
5590 /* Delete all unreachable basic blocks and update callgraph.
5591 Doing so is somewhat nontrivial because we need to update all clones and
5592 remove inline function that become unreachable. */
5595 delete_unreachable_blocks_update_callgraph (copy_body_data
*id
)
5597 bool changed
= false;
5598 basic_block b
, next_bb
;
5600 find_unreachable_blocks ();
5602 /* Delete all unreachable basic blocks. */
5604 for (b
= ENTRY_BLOCK_PTR_FOR_FN (cfun
)->next_bb
; b
5605 != EXIT_BLOCK_PTR_FOR_FN (cfun
); b
= next_bb
)
5607 next_bb
= b
->next_bb
;
5609 if (!(b
->flags
& BB_REACHABLE
))
5611 gimple_stmt_iterator bsi
;
5613 for (bsi
= gsi_start_bb (b
); !gsi_end_p (bsi
); gsi_next (&bsi
))
5615 struct cgraph_edge
*e
;
5616 struct cgraph_node
*node
;
5618 id
->dst_node
->remove_stmt_references (gsi_stmt (bsi
));
5620 if (gimple_code (gsi_stmt (bsi
)) == GIMPLE_CALL
5621 &&(e
= id
->dst_node
->get_edge (gsi_stmt (bsi
))) != NULL
)
5623 if (!e
->inline_failed
)
5624 e
->callee
->remove_symbol_and_inline_clones (id
->dst_node
);
5628 if (id
->transform_call_graph_edges
== CB_CGE_MOVE_CLONES
5629 && id
->dst_node
->clones
)
5630 for (node
= id
->dst_node
->clones
; node
!= id
->dst_node
;)
5632 node
->remove_stmt_references (gsi_stmt (bsi
));
5633 if (gimple_code (gsi_stmt (bsi
)) == GIMPLE_CALL
5634 && (e
= node
->get_edge (gsi_stmt (bsi
))) != NULL
)
5636 if (!e
->inline_failed
)
5637 e
->callee
->remove_symbol_and_inline_clones (id
->dst_node
);
5643 node
= node
->clones
;
5644 else if (node
->next_sibling_clone
)
5645 node
= node
->next_sibling_clone
;
5648 while (node
!= id
->dst_node
&& !node
->next_sibling_clone
)
5649 node
= node
->clone_of
;
5650 if (node
!= id
->dst_node
)
5651 node
= node
->next_sibling_clone
;
5655 delete_basic_block (b
);
5663 /* Update clone info after duplication. */
5666 update_clone_info (copy_body_data
* id
)
5668 struct cgraph_node
*node
;
5669 if (!id
->dst_node
->clones
)
5671 for (node
= id
->dst_node
->clones
; node
!= id
->dst_node
;)
5673 /* First update replace maps to match the new body. */
5674 if (node
->clone
.tree_map
)
5677 for (i
= 0; i
< vec_safe_length (node
->clone
.tree_map
); i
++)
5679 struct ipa_replace_map
*replace_info
;
5680 replace_info
= (*node
->clone
.tree_map
)[i
];
5681 walk_tree (&replace_info
->old_tree
, copy_tree_body_r
, id
, NULL
);
5682 walk_tree (&replace_info
->new_tree
, copy_tree_body_r
, id
, NULL
);
5686 node
= node
->clones
;
5687 else if (node
->next_sibling_clone
)
5688 node
= node
->next_sibling_clone
;
5691 while (node
!= id
->dst_node
&& !node
->next_sibling_clone
)
5692 node
= node
->clone_of
;
5693 if (node
!= id
->dst_node
)
5694 node
= node
->next_sibling_clone
;
5699 /* Create a copy of a function's tree.
5700 OLD_DECL and NEW_DECL are FUNCTION_DECL tree nodes
5701 of the original function and the new copied function
5702 respectively. In case we want to replace a DECL
5703 tree with another tree while duplicating the function's
5704 body, TREE_MAP represents the mapping between these
5705 trees. If UPDATE_CLONES is set, the call_stmt fields
5706 of edges of clones of the function will be updated.
5708 If non-NULL ARGS_TO_SKIP determine function parameters to remove
5710 If SKIP_RETURN is true, the new version will return void.
5711 If non-NULL BLOCK_TO_COPY determine what basic blocks to copy.
5712 If non_NULL NEW_ENTRY determine new entry BB of the clone.
5715 tree_function_versioning (tree old_decl
, tree new_decl
,
5716 vec
<ipa_replace_map
*, va_gc
> *tree_map
,
5717 bool update_clones
, bitmap args_to_skip
,
5718 bool skip_return
, bitmap blocks_to_copy
,
5719 basic_block new_entry
)
5721 struct cgraph_node
*old_version_node
;
5722 struct cgraph_node
*new_version_node
;
5726 struct ipa_replace_map
*replace_info
;
5727 basic_block old_entry_block
, bb
;
5728 auto_vec
<gimple
*, 10> init_stmts
;
5729 tree vars
= NULL_TREE
;
5730 bitmap debug_args_to_skip
= args_to_skip
;
5732 gcc_assert (TREE_CODE (old_decl
) == FUNCTION_DECL
5733 && TREE_CODE (new_decl
) == FUNCTION_DECL
);
5734 DECL_POSSIBLY_INLINED (old_decl
) = 1;
5736 old_version_node
= cgraph_node::get (old_decl
);
5737 gcc_checking_assert (old_version_node
);
5738 new_version_node
= cgraph_node::get (new_decl
);
5739 gcc_checking_assert (new_version_node
);
5741 /* Copy over debug args. */
5742 if (DECL_HAS_DEBUG_ARGS_P (old_decl
))
5744 vec
<tree
, va_gc
> **new_debug_args
, **old_debug_args
;
5745 gcc_checking_assert (decl_debug_args_lookup (new_decl
) == NULL
);
5746 DECL_HAS_DEBUG_ARGS_P (new_decl
) = 0;
5747 old_debug_args
= decl_debug_args_lookup (old_decl
);
5750 new_debug_args
= decl_debug_args_insert (new_decl
);
5751 *new_debug_args
= vec_safe_copy (*old_debug_args
);
5755 /* Output the inlining info for this abstract function, since it has been
5756 inlined. If we don't do this now, we can lose the information about the
5757 variables in the function when the blocks get blown away as soon as we
5758 remove the cgraph node. */
5759 (*debug_hooks
->outlining_inline_function
) (old_decl
);
5761 DECL_ARTIFICIAL (new_decl
) = 1;
5762 DECL_ABSTRACT_ORIGIN (new_decl
) = DECL_ORIGIN (old_decl
);
5763 if (DECL_ORIGIN (old_decl
) == old_decl
)
5764 old_version_node
->used_as_abstract_origin
= true;
5765 DECL_FUNCTION_PERSONALITY (new_decl
) = DECL_FUNCTION_PERSONALITY (old_decl
);
5767 /* Prepare the data structures for the tree copy. */
5768 memset (&id
, 0, sizeof (id
));
5770 /* Generate a new name for the new version. */
5771 id
.statements_to_fold
= new hash_set
<gimple
*>;
5773 id
.decl_map
= new hash_map
<tree
, tree
>;
5774 id
.debug_map
= NULL
;
5775 id
.src_fn
= old_decl
;
5776 id
.dst_fn
= new_decl
;
5777 id
.src_node
= old_version_node
;
5778 id
.dst_node
= new_version_node
;
5779 id
.src_cfun
= DECL_STRUCT_FUNCTION (old_decl
);
5780 id
.blocks_to_copy
= blocks_to_copy
;
5782 id
.copy_decl
= copy_decl_no_change
;
5783 id
.transform_call_graph_edges
5784 = update_clones
? CB_CGE_MOVE_CLONES
: CB_CGE_MOVE
;
5785 id
.transform_new_cfg
= true;
5786 id
.transform_return_to_modify
= false;
5787 id
.transform_parameter
= false;
5788 id
.transform_lang_insert_block
= NULL
;
5790 old_entry_block
= ENTRY_BLOCK_PTR_FOR_FN
5791 (DECL_STRUCT_FUNCTION (old_decl
));
5792 DECL_RESULT (new_decl
) = DECL_RESULT (old_decl
);
5793 DECL_ARGUMENTS (new_decl
) = DECL_ARGUMENTS (old_decl
);
5794 initialize_cfun (new_decl
, old_decl
,
5795 new_entry
? new_entry
->count
: old_entry_block
->count
);
5796 if (DECL_STRUCT_FUNCTION (new_decl
)->gimple_df
)
5797 DECL_STRUCT_FUNCTION (new_decl
)->gimple_df
->ipa_pta
5798 = id
.src_cfun
->gimple_df
->ipa_pta
;
5800 /* Copy the function's static chain. */
5801 p
= DECL_STRUCT_FUNCTION (old_decl
)->static_chain_decl
;
5803 DECL_STRUCT_FUNCTION (new_decl
)->static_chain_decl
5804 = copy_static_chain (p
, &id
);
5806 /* If there's a tree_map, prepare for substitution. */
5808 for (i
= 0; i
< tree_map
->length (); i
++)
5811 replace_info
= (*tree_map
)[i
];
5812 if (replace_info
->replace_p
)
5815 if (!replace_info
->old_tree
)
5817 int p
= replace_info
->parm_num
;
5819 tree req_type
, new_type
;
5821 for (parm
= DECL_ARGUMENTS (old_decl
); p
;
5822 parm
= DECL_CHAIN (parm
))
5824 replace_info
->old_tree
= parm
;
5825 parm_num
= replace_info
->parm_num
;
5826 req_type
= TREE_TYPE (parm
);
5827 new_type
= TREE_TYPE (replace_info
->new_tree
);
5828 if (!useless_type_conversion_p (req_type
, new_type
))
5830 if (fold_convertible_p (req_type
, replace_info
->new_tree
))
5831 replace_info
->new_tree
5832 = fold_build1 (NOP_EXPR
, req_type
,
5833 replace_info
->new_tree
);
5834 else if (TYPE_SIZE (req_type
) == TYPE_SIZE (new_type
))
5835 replace_info
->new_tree
5836 = fold_build1 (VIEW_CONVERT_EXPR
, req_type
,
5837 replace_info
->new_tree
);
5842 fprintf (dump_file
, " const ");
5843 print_generic_expr (dump_file
,
5844 replace_info
->new_tree
);
5846 " can't be converted to param ");
5847 print_generic_expr (dump_file
, parm
);
5848 fprintf (dump_file
, "\n");
5850 replace_info
->old_tree
= NULL
;
5855 gcc_assert (TREE_CODE (replace_info
->old_tree
) == PARM_DECL
);
5856 if (replace_info
->old_tree
)
5858 init
= setup_one_parameter (&id
, replace_info
->old_tree
,
5859 replace_info
->new_tree
, id
.src_fn
,
5863 init_stmts
.safe_push (init
);
5864 if (MAY_HAVE_DEBUG_BIND_STMTS
&& args_to_skip
)
5870 for (parm
= DECL_ARGUMENTS (old_decl
), p
= 0; parm
;
5871 parm
= DECL_CHAIN (parm
), p
++)
5872 if (parm
== replace_info
->old_tree
)
5880 if (debug_args_to_skip
== args_to_skip
)
5882 debug_args_to_skip
= BITMAP_ALLOC (NULL
);
5883 bitmap_copy (debug_args_to_skip
, args_to_skip
);
5885 bitmap_clear_bit (debug_args_to_skip
, parm_num
);
5891 /* Copy the function's arguments. */
5892 if (DECL_ARGUMENTS (old_decl
) != NULL_TREE
)
5893 DECL_ARGUMENTS (new_decl
)
5894 = copy_arguments_for_versioning (DECL_ARGUMENTS (old_decl
), &id
,
5895 args_to_skip
, &vars
);
5897 DECL_INITIAL (new_decl
) = remap_blocks (DECL_INITIAL (id
.src_fn
), &id
);
5898 BLOCK_SUPERCONTEXT (DECL_INITIAL (new_decl
)) = new_decl
;
5900 declare_inline_vars (DECL_INITIAL (new_decl
), vars
);
5902 if (!vec_safe_is_empty (DECL_STRUCT_FUNCTION (old_decl
)->local_decls
))
5903 /* Add local vars. */
5904 add_local_variables (DECL_STRUCT_FUNCTION (old_decl
), cfun
, &id
);
5906 if (DECL_RESULT (old_decl
) == NULL_TREE
)
5908 else if (skip_return
&& !VOID_TYPE_P (TREE_TYPE (DECL_RESULT (old_decl
))))
5910 DECL_RESULT (new_decl
)
5911 = build_decl (DECL_SOURCE_LOCATION (DECL_RESULT (old_decl
)),
5912 RESULT_DECL
, NULL_TREE
, void_type_node
);
5913 DECL_CONTEXT (DECL_RESULT (new_decl
)) = new_decl
;
5914 cfun
->returns_struct
= 0;
5915 cfun
->returns_pcc_struct
= 0;
5920 DECL_RESULT (new_decl
) = remap_decl (DECL_RESULT (old_decl
), &id
);
5921 lang_hooks
.dup_lang_specific_decl (DECL_RESULT (new_decl
));
5922 if (gimple_in_ssa_p (id
.src_cfun
)
5923 && DECL_BY_REFERENCE (DECL_RESULT (old_decl
))
5924 && (old_name
= ssa_default_def (id
.src_cfun
, DECL_RESULT (old_decl
))))
5926 tree new_name
= make_ssa_name (DECL_RESULT (new_decl
));
5927 insert_decl_map (&id
, old_name
, new_name
);
5928 SSA_NAME_DEF_STMT (new_name
) = gimple_build_nop ();
5929 set_ssa_default_def (cfun
, DECL_RESULT (new_decl
), new_name
);
5933 /* Set up the destination functions loop tree. */
5934 if (loops_for_fn (DECL_STRUCT_FUNCTION (old_decl
)) != NULL
)
5936 cfun
->curr_properties
&= ~PROP_loops
;
5937 loop_optimizer_init (AVOID_CFG_MODIFICATIONS
);
5938 cfun
->curr_properties
|= PROP_loops
;
5941 /* Copy the Function's body. */
5942 copy_body (&id
, ENTRY_BLOCK_PTR_FOR_FN (cfun
), EXIT_BLOCK_PTR_FOR_FN (cfun
),
5945 /* Renumber the lexical scoping (non-code) blocks consecutively. */
5946 number_blocks (new_decl
);
5948 /* We want to create the BB unconditionally, so that the addition of
5949 debug stmts doesn't affect BB count, which may in the end cause
5950 codegen differences. */
5951 bb
= split_edge (single_succ_edge (ENTRY_BLOCK_PTR_FOR_FN (cfun
)));
5952 while (init_stmts
.length ())
5953 insert_init_stmt (&id
, bb
, init_stmts
.pop ());
5954 update_clone_info (&id
);
5956 /* Remap the nonlocal_goto_save_area, if any. */
5957 if (cfun
->nonlocal_goto_save_area
)
5959 struct walk_stmt_info wi
;
5961 memset (&wi
, 0, sizeof (wi
));
5963 walk_tree (&cfun
->nonlocal_goto_save_area
, remap_gimple_op_r
, &wi
, NULL
);
5969 delete id
.debug_map
;
5970 free_dominance_info (CDI_DOMINATORS
);
5971 free_dominance_info (CDI_POST_DOMINATORS
);
5973 update_max_bb_count ();
5974 fold_marked_statements (0, id
.statements_to_fold
);
5975 delete id
.statements_to_fold
;
5976 delete_unreachable_blocks_update_callgraph (&id
);
5977 if (id
.dst_node
->definition
)
5978 cgraph_edge::rebuild_references ();
5979 if (loops_state_satisfies_p (LOOPS_NEED_FIXUP
))
5981 calculate_dominance_info (CDI_DOMINATORS
);
5982 fix_loop_structure (NULL
);
5984 update_ssa (TODO_update_ssa
);
5986 /* After partial cloning we need to rescale frequencies, so they are
5987 within proper range in the cloned function. */
5990 struct cgraph_edge
*e
;
5991 rebuild_frequencies ();
5993 new_version_node
->count
= ENTRY_BLOCK_PTR_FOR_FN (cfun
)->count
;
5994 for (e
= new_version_node
->callees
; e
; e
= e
->next_callee
)
5996 basic_block bb
= gimple_bb (e
->call_stmt
);
5997 e
->count
= bb
->count
;
5999 for (e
= new_version_node
->indirect_calls
; e
; e
= e
->next_callee
)
6001 basic_block bb
= gimple_bb (e
->call_stmt
);
6002 e
->count
= bb
->count
;
6006 if (debug_args_to_skip
&& MAY_HAVE_DEBUG_BIND_STMTS
)
6009 vec
<tree
, va_gc
> **debug_args
= NULL
;
6010 unsigned int len
= 0;
6011 for (parm
= DECL_ARGUMENTS (old_decl
), i
= 0;
6012 parm
; parm
= DECL_CHAIN (parm
), i
++)
6013 if (bitmap_bit_p (debug_args_to_skip
, i
) && is_gimple_reg (parm
))
6017 if (debug_args
== NULL
)
6019 debug_args
= decl_debug_args_insert (new_decl
);
6020 len
= vec_safe_length (*debug_args
);
6022 ddecl
= make_node (DEBUG_EXPR_DECL
);
6023 DECL_ARTIFICIAL (ddecl
) = 1;
6024 TREE_TYPE (ddecl
) = TREE_TYPE (parm
);
6025 SET_DECL_MODE (ddecl
, DECL_MODE (parm
));
6026 vec_safe_push (*debug_args
, DECL_ORIGIN (parm
));
6027 vec_safe_push (*debug_args
, ddecl
);
6029 if (debug_args
!= NULL
)
6031 /* On the callee side, add
6034 stmts to the first bb where var is a VAR_DECL created for the
6035 optimized away parameter in DECL_INITIAL block. This hints
6036 in the debug info that var (whole DECL_ORIGIN is the parm
6037 PARM_DECL) is optimized away, but could be looked up at the
6038 call site as value of D#X there. */
6039 tree var
= vars
, vexpr
;
6040 gimple_stmt_iterator cgsi
6041 = gsi_after_labels (single_succ (ENTRY_BLOCK_PTR_FOR_FN (cfun
)));
6044 i
= vec_safe_length (*debug_args
);
6048 while (var
!= NULL_TREE
6049 && DECL_ABSTRACT_ORIGIN (var
) != (**debug_args
)[i
])
6050 var
= TREE_CHAIN (var
);
6051 if (var
== NULL_TREE
)
6053 vexpr
= make_node (DEBUG_EXPR_DECL
);
6054 parm
= (**debug_args
)[i
];
6055 DECL_ARTIFICIAL (vexpr
) = 1;
6056 TREE_TYPE (vexpr
) = TREE_TYPE (parm
);
6057 SET_DECL_MODE (vexpr
, DECL_MODE (parm
));
6058 def_temp
= gimple_build_debug_bind (var
, vexpr
, NULL
);
6059 gsi_insert_before (&cgsi
, def_temp
, GSI_NEW_STMT
);
6060 def_temp
= gimple_build_debug_source_bind (vexpr
, parm
, NULL
);
6061 gsi_insert_before (&cgsi
, def_temp
, GSI_NEW_STMT
);
6067 if (debug_args_to_skip
&& debug_args_to_skip
!= args_to_skip
)
6068 BITMAP_FREE (debug_args_to_skip
);
6069 free_dominance_info (CDI_DOMINATORS
);
6070 free_dominance_info (CDI_POST_DOMINATORS
);
6072 gcc_assert (!id
.debug_stmts
.exists ());
6077 /* EXP is CALL_EXPR present in a GENERIC expression tree. Try to integrate
6078 the callee and return the inlined body on success. */
6081 maybe_inline_call_in_expr (tree exp
)
6083 tree fn
= get_callee_fndecl (exp
);
6085 /* We can only try to inline "const" functions. */
6086 if (fn
&& TREE_READONLY (fn
) && DECL_SAVED_TREE (fn
))
6088 call_expr_arg_iterator iter
;
6091 hash_map
<tree
, tree
> decl_map
;
6093 /* Remap the parameters. */
6094 for (param
= DECL_ARGUMENTS (fn
), arg
= first_call_expr_arg (exp
, &iter
);
6096 param
= DECL_CHAIN (param
), arg
= next_call_expr_arg (&iter
))
6097 decl_map
.put (param
, arg
);
6099 memset (&id
, 0, sizeof (id
));
6101 id
.dst_fn
= current_function_decl
;
6102 id
.src_cfun
= DECL_STRUCT_FUNCTION (fn
);
6103 id
.decl_map
= &decl_map
;
6105 id
.copy_decl
= copy_decl_no_change
;
6106 id
.transform_call_graph_edges
= CB_CGE_DUPLICATE
;
6107 id
.transform_new_cfg
= false;
6108 id
.transform_return_to_modify
= true;
6109 id
.transform_parameter
= true;
6110 id
.transform_lang_insert_block
= NULL
;
6112 /* Make sure not to unshare trees behind the front-end's back
6113 since front-end specific mechanisms may rely on sharing. */
6114 id
.regimplify
= false;
6115 id
.do_not_unshare
= true;
6117 /* We're not inside any EH region. */
6120 t
= copy_tree_body (&id
);
6122 /* We can only return something suitable for use in a GENERIC
6124 if (TREE_CODE (t
) == MODIFY_EXPR
)
6125 return TREE_OPERAND (t
, 1);
6131 /* Duplicate a type, fields and all. */
6134 build_duplicate_type (tree type
)
6136 struct copy_body_data id
;
6138 memset (&id
, 0, sizeof (id
));
6139 id
.src_fn
= current_function_decl
;
6140 id
.dst_fn
= current_function_decl
;
6142 id
.decl_map
= new hash_map
<tree
, tree
>;
6143 id
.debug_map
= NULL
;
6144 id
.copy_decl
= copy_decl_no_change
;
6146 type
= remap_type_1 (type
, &id
);
6150 delete id
.debug_map
;
6152 TYPE_CANONICAL (type
) = type
;
6157 /* Unshare the entire DECL_SAVED_TREE of FN and return the remapped
6158 parameters and RESULT_DECL in PARMS and RESULT. Used by C++ constexpr
6162 copy_fn (tree fn
, tree
& parms
, tree
& result
)
6166 hash_map
<tree
, tree
> decl_map
;
6171 memset (&id
, 0, sizeof (id
));
6173 id
.dst_fn
= current_function_decl
;
6174 id
.src_cfun
= DECL_STRUCT_FUNCTION (fn
);
6175 id
.decl_map
= &decl_map
;
6177 id
.copy_decl
= copy_decl_no_change
;
6178 id
.transform_call_graph_edges
= CB_CGE_DUPLICATE
;
6179 id
.transform_new_cfg
= false;
6180 id
.transform_return_to_modify
= false;
6181 id
.transform_parameter
= true;
6182 id
.transform_lang_insert_block
= NULL
;
6184 /* Make sure not to unshare trees behind the front-end's back
6185 since front-end specific mechanisms may rely on sharing. */
6186 id
.regimplify
= false;
6187 id
.do_not_unshare
= true;
6189 /* We're not inside any EH region. */
6192 /* Remap the parameters and result and return them to the caller. */
6193 for (param
= DECL_ARGUMENTS (fn
);
6195 param
= DECL_CHAIN (param
))
6197 *p
= remap_decl (param
, &id
);
6198 p
= &DECL_CHAIN (*p
);
6201 if (DECL_RESULT (fn
))
6202 result
= remap_decl (DECL_RESULT (fn
), &id
);
6206 return copy_tree_body (&id
);