2 Copyright (C) 2001-2024 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-iterator.h"
45 #include "gimple-fold.h"
48 #include "gimplify-me.h"
49 #include "gimple-walk.h"
51 #include "tree-into-ssa.h"
56 #include "value-prof.h"
59 #include "stringpool.h"
62 #include "tree-cfgcleanup.h"
63 #include "tree-ssa-live.h"
64 #include "alloc-pool.h"
65 #include "symbol-summary.h"
66 #include "symtab-thunks.h"
67 #include "symtab-clones.h"
69 /* I'm not real happy about this, but we need to handle gimple and
72 /* Inlining, Cloning, Versioning, Parallelization
74 Inlining: a function body is duplicated, but the PARM_DECLs are
75 remapped into VAR_DECLs, and non-void RETURN_EXPRs become
76 MODIFY_EXPRs that store to a dedicated returned-value variable.
77 The duplicated eh_region info of the copy will later be appended
78 to the info for the caller; the eh_region info in copied throwing
79 statements and RESX statements are adjusted accordingly.
81 Cloning: (only in C++) We have one body for a con/de/structor, and
82 multiple function decls, each with a unique parameter list.
83 Duplicate the body, using the given splay tree; some parameters
84 will become constants (like 0 or 1).
86 Versioning: a function body is duplicated and the result is a new
87 function rather than into blocks of an existing function as with
88 inlining. Some parameters will become constants.
90 Parallelization: a region of a function is duplicated resulting in
91 a new function. Variables may be replaced with complex expressions
92 to enable shared variable semantics.
94 All of these will simultaneously lookup any callgraph edges. If
95 we're going to inline the duplicated function body, and the given
96 function has some cloned callgraph nodes (one for each place this
97 function will be inlined) those callgraph edges will be duplicated.
98 If we're cloning the body, those callgraph edges will be
99 updated to point into the new body. (Note that the original
100 callgraph node and edge list will not be altered.)
102 See the CALL_EXPR handling case in copy_tree_body_r (). */
106 o In order to make inlining-on-trees work, we pessimized
107 function-local static constants. In particular, they are now
108 always output, even when not addressed. Fix this by treating
109 function-local static constants just like global static
110 constants; the back-end already knows not to output them if they
113 o Provide heuristics to clamp inlining of recursive template
117 /* Weights that estimate_num_insns uses to estimate the size of the
120 eni_weights eni_size_weights
;
122 /* Weights that estimate_num_insns uses to estimate the time necessary
123 to execute the produced code. */
125 eni_weights eni_time_weights
;
129 static tree
declare_return_variable (copy_body_data
*, tree
, tree
,
131 static void remap_block (tree
*, copy_body_data
*);
132 static void copy_bind_expr (tree
*, int *, copy_body_data
*);
133 static void declare_inline_vars (tree
, tree
);
134 static void remap_save_expr (tree
*, hash_map
<tree
, tree
> *, int *);
135 static void prepend_lexical_block (tree current_block
, tree new_block
);
136 static tree
copy_result_decl_to_var (tree
, copy_body_data
*);
137 static tree
copy_decl_maybe_to_var (tree
, copy_body_data
*);
138 static gimple_seq
remap_gimple_stmt (gimple
*, copy_body_data
*);
139 static void insert_init_stmt (copy_body_data
*, basic_block
, gimple
*);
141 /* Insert a tree->tree mapping for ID. Despite the name suggests
142 that the trees should be variables, it is used for more than that. */
145 insert_decl_map (copy_body_data
*id
, tree key
, tree value
)
147 id
->decl_map
->put (key
, value
);
149 /* Always insert an identity map as well. If we see this same new
150 node again, we won't want to duplicate it a second time. */
151 if (key
!= value
&& value
)
152 id
->decl_map
->put (value
, value
);
155 /* If nonzero, we're remapping the contents of inlined debug
156 statements. If negative, an error has occurred, such as a
157 reference to a variable that isn't available in the inlined
159 static int processing_debug_stmt
= 0;
161 /* Construct new SSA name for old NAME. ID is the inline context. */
164 remap_ssa_name (tree name
, copy_body_data
*id
)
169 gcc_assert (TREE_CODE (name
) == SSA_NAME
);
171 n
= id
->decl_map
->get (name
);
174 /* When we perform edge redirection as part of CFG copy, IPA-SRA can
175 remove an unused LHS from a call statement. Such LHS can however
176 still appear in debug statements, but their value is lost in this
177 function and we do not want to map them. */
178 if (id
->killed_new_ssa_names
179 && id
->killed_new_ssa_names
->contains (*n
))
181 gcc_assert (processing_debug_stmt
);
182 processing_debug_stmt
= -1;
186 return unshare_expr (*n
);
189 if (processing_debug_stmt
)
191 if (SSA_NAME_IS_DEFAULT_DEF (name
)
192 && TREE_CODE (SSA_NAME_VAR (name
)) == PARM_DECL
193 && id
->entry_bb
== NULL
194 && single_succ_p (ENTRY_BLOCK_PTR_FOR_FN (cfun
)))
197 gimple_stmt_iterator gsi
;
198 tree val
= SSA_NAME_VAR (name
);
200 n
= id
->decl_map
->get (val
);
203 if (TREE_CODE (val
) != PARM_DECL
204 && !(VAR_P (val
) && DECL_ABSTRACT_ORIGIN (val
)))
206 processing_debug_stmt
= -1;
209 n
= id
->decl_map
->get (val
);
210 if (n
&& TREE_CODE (*n
) == DEBUG_EXPR_DECL
)
212 tree vexpr
= build_debug_expr_decl (TREE_TYPE (name
));
213 /* FIXME: Is setting the mode really necessary? */
214 SET_DECL_MODE (vexpr
, DECL_MODE (SSA_NAME_VAR (name
)));
215 def_temp
= gimple_build_debug_source_bind (vexpr
, val
, NULL
);
216 gsi
= gsi_after_labels (single_succ (ENTRY_BLOCK_PTR_FOR_FN (cfun
)));
217 gsi_insert_before (&gsi
, def_temp
, GSI_SAME_STMT
);
218 insert_decl_map (id
, val
, vexpr
);
222 processing_debug_stmt
= -1;
226 /* Remap anonymous SSA names or SSA names of anonymous decls. */
227 var
= SSA_NAME_VAR (name
);
229 || (!SSA_NAME_IS_DEFAULT_DEF (name
)
231 && !VAR_DECL_IS_VIRTUAL_OPERAND (var
)
232 && DECL_ARTIFICIAL (var
)
233 && DECL_IGNORED_P (var
)
234 && !DECL_NAME (var
)))
236 struct ptr_info_def
*pi
;
237 new_tree
= make_ssa_name (remap_type (TREE_TYPE (name
), id
));
238 if (!var
&& SSA_NAME_IDENTIFIER (name
))
239 SET_SSA_NAME_VAR_OR_IDENTIFIER (new_tree
, SSA_NAME_IDENTIFIER (name
));
240 insert_decl_map (id
, name
, new_tree
);
241 SSA_NAME_OCCURS_IN_ABNORMAL_PHI (new_tree
)
242 = SSA_NAME_OCCURS_IN_ABNORMAL_PHI (name
);
243 /* At least IPA points-to info can be directly transferred. */
244 if (id
->src_cfun
->gimple_df
245 && id
->src_cfun
->gimple_df
->ipa_pta
246 && POINTER_TYPE_P (TREE_TYPE (name
))
247 && (pi
= SSA_NAME_PTR_INFO (name
))
250 struct ptr_info_def
*new_pi
= get_ptr_info (new_tree
);
253 /* So can range-info. */
254 if (!POINTER_TYPE_P (TREE_TYPE (name
))
255 && SSA_NAME_RANGE_INFO (name
))
256 duplicate_ssa_name_range_info (new_tree
, name
);
260 /* Do not set DEF_STMT yet as statement is not copied yet. We do that
262 new_tree
= remap_decl (var
, id
);
264 /* We might've substituted constant or another SSA_NAME for
267 Replace the SSA name representing RESULT_DECL by variable during
268 inlining: this saves us from need to introduce PHI node in a case
269 return value is just partly initialized. */
270 if ((VAR_P (new_tree
) || TREE_CODE (new_tree
) == PARM_DECL
)
271 && (!SSA_NAME_VAR (name
)
272 || TREE_CODE (SSA_NAME_VAR (name
)) != RESULT_DECL
273 || !id
->transform_return_to_modify
))
275 struct ptr_info_def
*pi
;
276 new_tree
= make_ssa_name (new_tree
);
277 insert_decl_map (id
, name
, new_tree
);
278 SSA_NAME_OCCURS_IN_ABNORMAL_PHI (new_tree
)
279 = SSA_NAME_OCCURS_IN_ABNORMAL_PHI (name
);
280 /* At least IPA points-to info can be directly transferred. */
281 if (id
->src_cfun
->gimple_df
282 && id
->src_cfun
->gimple_df
->ipa_pta
283 && POINTER_TYPE_P (TREE_TYPE (name
))
284 && (pi
= SSA_NAME_PTR_INFO (name
))
287 struct ptr_info_def
*new_pi
= get_ptr_info (new_tree
);
290 /* So can range-info. */
291 if (!POINTER_TYPE_P (TREE_TYPE (name
))
292 && SSA_NAME_RANGE_INFO (name
))
293 duplicate_ssa_name_range_info (new_tree
, name
);
294 if (SSA_NAME_IS_DEFAULT_DEF (name
))
296 /* By inlining function having uninitialized variable, we might
297 extend the lifetime (variable might get reused). This cause
298 ICE in the case we end up extending lifetime of SSA name across
299 abnormal edge, but also increase register pressure.
301 We simply initialize all uninitialized vars by 0 except
302 for case we are inlining to very first BB. We can avoid
303 this for all BBs that are not inside strongly connected
304 regions of the CFG, but this is expensive to test. */
306 && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (name
)
307 && (!SSA_NAME_VAR (name
)
308 || TREE_CODE (SSA_NAME_VAR (name
)) != PARM_DECL
)
309 && (id
->entry_bb
!= EDGE_SUCC (ENTRY_BLOCK_PTR_FOR_FN (cfun
),
311 || EDGE_COUNT (id
->entry_bb
->preds
) != 1))
313 gimple_stmt_iterator gsi
= gsi_last_bb (id
->entry_bb
);
315 tree zero
= build_zero_cst (TREE_TYPE (new_tree
));
317 init_stmt
= gimple_build_assign (new_tree
, zero
);
318 gsi_insert_after (&gsi
, init_stmt
, GSI_NEW_STMT
);
319 SSA_NAME_IS_DEFAULT_DEF (new_tree
) = 0;
323 SSA_NAME_DEF_STMT (new_tree
) = gimple_build_nop ();
324 set_ssa_default_def (cfun
, SSA_NAME_VAR (new_tree
), new_tree
);
329 insert_decl_map (id
, name
, new_tree
);
333 /* Remap DECL during the copying of the BLOCK tree for the function. */
336 remap_decl (tree decl
, copy_body_data
*id
)
340 /* We only remap local variables in the current function. */
342 /* See if we have remapped this declaration. */
344 n
= id
->decl_map
->get (decl
);
346 if (!n
&& processing_debug_stmt
)
348 processing_debug_stmt
= -1;
352 /* When remapping a type within copy_gimple_seq_and_replace_locals, all
353 necessary DECLs have already been remapped and we do not want to duplicate
354 a decl coming from outside of the sequence we are copying. */
356 && id
->prevent_decl_creation_for_types
357 && id
->remapping_type_depth
> 0
358 && (VAR_P (decl
) || TREE_CODE (decl
) == PARM_DECL
))
361 /* If we didn't already have an equivalent for this declaration, create one
365 /* Make a copy of the variable or label. */
366 tree t
= id
->copy_decl (decl
, id
);
368 /* Remember it, so that if we encounter this local entity again
369 we can reuse this copy. Do this early because remap_type may
370 need this decl for TYPE_STUB_DECL. */
371 insert_decl_map (id
, decl
, t
);
376 /* Remap types, if necessary. */
377 TREE_TYPE (t
) = remap_type (TREE_TYPE (t
), id
);
378 if (TREE_CODE (t
) == TYPE_DECL
)
380 DECL_ORIGINAL_TYPE (t
) = remap_type (DECL_ORIGINAL_TYPE (t
), id
);
382 /* Preserve the invariant that DECL_ORIGINAL_TYPE != TREE_TYPE,
383 which is enforced in gen_typedef_die when DECL_ABSTRACT_ORIGIN
384 is not set on the TYPE_DECL, for example in LTO mode. */
385 if (DECL_ORIGINAL_TYPE (t
) == TREE_TYPE (t
))
387 tree x
= build_variant_type_copy (TREE_TYPE (t
));
388 TYPE_STUB_DECL (x
) = TYPE_STUB_DECL (TREE_TYPE (t
));
389 TYPE_NAME (x
) = TYPE_NAME (TREE_TYPE (t
));
390 DECL_ORIGINAL_TYPE (t
) = x
;
394 /* Remap sizes as necessary. */
395 walk_tree (&DECL_SIZE (t
), copy_tree_body_r
, id
, NULL
);
396 walk_tree (&DECL_SIZE_UNIT (t
), copy_tree_body_r
, id
, NULL
);
398 /* If fields, do likewise for offset and qualifier. */
399 if (TREE_CODE (t
) == FIELD_DECL
)
401 walk_tree (&DECL_FIELD_OFFSET (t
), copy_tree_body_r
, id
, NULL
);
402 if (TREE_CODE (DECL_CONTEXT (t
)) == QUAL_UNION_TYPE
)
403 walk_tree (&DECL_QUALIFIER (t
), copy_tree_body_r
, id
, NULL
);
409 if (id
->do_not_unshare
)
412 return unshare_expr (*n
);
416 remap_type_1 (tree type
, copy_body_data
*id
)
420 /* We do need a copy. build and register it now. If this is a pointer or
421 reference type, remap the designated type and make a new pointer or
423 if (TREE_CODE (type
) == POINTER_TYPE
)
425 new_tree
= build_pointer_type_for_mode (remap_type (TREE_TYPE (type
), id
),
427 TYPE_REF_CAN_ALIAS_ALL (type
));
428 if (TYPE_ATTRIBUTES (type
) || TYPE_QUALS (type
))
429 new_tree
= build_type_attribute_qual_variant (new_tree
,
430 TYPE_ATTRIBUTES (type
),
432 insert_decl_map (id
, type
, new_tree
);
435 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
437 new_tree
= build_reference_type_for_mode (remap_type (TREE_TYPE (type
), id
),
439 TYPE_REF_CAN_ALIAS_ALL (type
));
440 if (TYPE_ATTRIBUTES (type
) || TYPE_QUALS (type
))
441 new_tree
= build_type_attribute_qual_variant (new_tree
,
442 TYPE_ATTRIBUTES (type
),
444 insert_decl_map (id
, type
, new_tree
);
448 new_tree
= copy_node (type
);
450 insert_decl_map (id
, type
, new_tree
);
452 /* This is a new type, not a copy of an old type. Need to reassociate
453 variants. We can handle everything except the main variant lazily. */
454 t
= TYPE_MAIN_VARIANT (type
);
457 t
= remap_type (t
, id
);
458 TYPE_MAIN_VARIANT (new_tree
) = t
;
459 TYPE_NEXT_VARIANT (new_tree
) = TYPE_NEXT_VARIANT (t
);
460 TYPE_NEXT_VARIANT (t
) = new_tree
;
464 TYPE_MAIN_VARIANT (new_tree
) = new_tree
;
465 TYPE_NEXT_VARIANT (new_tree
) = NULL
;
468 if (TYPE_STUB_DECL (type
))
469 TYPE_STUB_DECL (new_tree
) = remap_decl (TYPE_STUB_DECL (type
), id
);
471 /* Lazily create pointer and reference types. */
472 TYPE_POINTER_TO (new_tree
) = NULL
;
473 TYPE_REFERENCE_TO (new_tree
) = NULL
;
475 /* Copy all types that may contain references to local variables; be sure to
476 preserve sharing in between type and its main variant when possible. */
477 switch (TREE_CODE (new_tree
))
481 case FIXED_POINT_TYPE
:
484 if (TYPE_MAIN_VARIANT (new_tree
) != new_tree
)
486 gcc_checking_assert (TYPE_MIN_VALUE (type
) == TYPE_MIN_VALUE (TYPE_MAIN_VARIANT (type
)));
487 gcc_checking_assert (TYPE_MAX_VALUE (type
) == TYPE_MAX_VALUE (TYPE_MAIN_VARIANT (type
)));
489 TYPE_MIN_VALUE (new_tree
) = TYPE_MIN_VALUE (TYPE_MAIN_VARIANT (new_tree
));
490 TYPE_MAX_VALUE (new_tree
) = TYPE_MAX_VALUE (TYPE_MAIN_VARIANT (new_tree
));
494 t
= TYPE_MIN_VALUE (new_tree
);
495 if (t
&& TREE_CODE (t
) != INTEGER_CST
)
496 walk_tree (&TYPE_MIN_VALUE (new_tree
), copy_tree_body_r
, id
, NULL
);
498 t
= TYPE_MAX_VALUE (new_tree
);
499 if (t
&& TREE_CODE (t
) != INTEGER_CST
)
500 walk_tree (&TYPE_MAX_VALUE (new_tree
), copy_tree_body_r
, id
, NULL
);
505 if (TYPE_MAIN_VARIANT (new_tree
) != new_tree
506 && TREE_TYPE (type
) == TREE_TYPE (TYPE_MAIN_VARIANT (type
)))
507 TREE_TYPE (new_tree
) = TREE_TYPE (TYPE_MAIN_VARIANT (new_tree
));
509 TREE_TYPE (new_tree
) = remap_type (TREE_TYPE (new_tree
), id
);
510 if (TYPE_MAIN_VARIANT (new_tree
) != new_tree
511 && TYPE_ARG_TYPES (type
) == TYPE_ARG_TYPES (TYPE_MAIN_VARIANT (type
)))
512 TYPE_ARG_TYPES (new_tree
) = TYPE_ARG_TYPES (TYPE_MAIN_VARIANT (new_tree
));
514 walk_tree (&TYPE_ARG_TYPES (new_tree
), copy_tree_body_r
, id
, NULL
);
518 if (TYPE_MAIN_VARIANT (new_tree
) != new_tree
519 && TREE_TYPE (type
) == TREE_TYPE (TYPE_MAIN_VARIANT (type
)))
520 TREE_TYPE (new_tree
) = TREE_TYPE (TYPE_MAIN_VARIANT (new_tree
));
522 TREE_TYPE (new_tree
) = remap_type (TREE_TYPE (new_tree
), id
);
524 if (TYPE_MAIN_VARIANT (new_tree
) != new_tree
)
526 gcc_checking_assert (TYPE_DOMAIN (type
)
527 == TYPE_DOMAIN (TYPE_MAIN_VARIANT (type
)));
528 TYPE_DOMAIN (new_tree
) = TYPE_DOMAIN (TYPE_MAIN_VARIANT (new_tree
));
532 TYPE_DOMAIN (new_tree
) = remap_type (TYPE_DOMAIN (new_tree
), id
);
533 /* For array bounds where we have decided not to copy over the bounds
534 variable which isn't used in OpenMP/OpenACC region, change them to
535 an uninitialized VAR_DECL temporary. */
536 if (id
->adjust_array_error_bounds
537 && TYPE_DOMAIN (new_tree
)
538 && TYPE_MAX_VALUE (TYPE_DOMAIN (new_tree
)) == error_mark_node
539 && TYPE_MAX_VALUE (TYPE_DOMAIN (type
)) != error_mark_node
)
541 tree v
= create_tmp_var (TREE_TYPE (TYPE_DOMAIN (new_tree
)));
543 = tree_cons (get_identifier ("omp dummy var"), NULL_TREE
,
544 DECL_ATTRIBUTES (v
));
545 TYPE_MAX_VALUE (TYPE_DOMAIN (new_tree
)) = v
;
552 case QUAL_UNION_TYPE
:
553 if (TYPE_MAIN_VARIANT (type
) != type
554 && TYPE_FIELDS (type
) == TYPE_FIELDS (TYPE_MAIN_VARIANT (type
)))
555 TYPE_FIELDS (new_tree
) = TYPE_FIELDS (TYPE_MAIN_VARIANT (new_tree
));
560 for (f
= TYPE_FIELDS (new_tree
); f
; f
= DECL_CHAIN (f
))
562 t
= remap_decl (f
, id
);
563 DECL_CONTEXT (t
) = new_tree
;
567 TYPE_FIELDS (new_tree
) = nreverse (nf
);
573 /* Shouldn't have been thought variable sized. */
577 /* All variants of type share the same size, so use the already remaped data. */
578 if (TYPE_MAIN_VARIANT (new_tree
) != new_tree
)
580 tree s
= TYPE_SIZE (type
);
581 tree mvs
= TYPE_SIZE (TYPE_MAIN_VARIANT (type
));
582 tree su
= TYPE_SIZE_UNIT (type
);
583 tree mvsu
= TYPE_SIZE_UNIT (TYPE_MAIN_VARIANT (type
));
584 gcc_checking_assert ((TREE_CODE (s
) == PLACEHOLDER_EXPR
585 && (TREE_CODE (mvs
) == PLACEHOLDER_EXPR
))
587 gcc_checking_assert ((TREE_CODE (su
) == PLACEHOLDER_EXPR
588 && (TREE_CODE (mvsu
) == PLACEHOLDER_EXPR
))
590 TYPE_SIZE (new_tree
) = TYPE_SIZE (TYPE_MAIN_VARIANT (new_tree
));
591 TYPE_SIZE_UNIT (new_tree
) = TYPE_SIZE_UNIT (TYPE_MAIN_VARIANT (new_tree
));
595 walk_tree (&TYPE_SIZE (new_tree
), copy_tree_body_r
, id
, NULL
);
596 walk_tree (&TYPE_SIZE_UNIT (new_tree
), copy_tree_body_r
, id
, NULL
);
602 /* Helper function for remap_type_2, called through walk_tree. */
605 remap_type_3 (tree
*tp
, int *walk_subtrees
, void *data
)
607 copy_body_data
*id
= (copy_body_data
*) data
;
612 else if (DECL_P (*tp
) && remap_decl (*tp
, id
) != *tp
)
618 /* Return true if TYPE needs to be remapped because remap_decl on any
619 needed embedded decl returns something other than that decl. */
622 remap_type_2 (tree type
, copy_body_data
*id
)
626 #define RETURN_TRUE_IF_VAR(T) \
632 if (DECL_P (_t) && remap_decl (_t, id) != _t) \
634 if (!TYPE_SIZES_GIMPLIFIED (type) \
635 && walk_tree (&_t, remap_type_3, id, NULL)) \
641 switch (TREE_CODE (type
))
647 return remap_type_2 (TREE_TYPE (type
), id
);
651 case FIXED_POINT_TYPE
:
654 RETURN_TRUE_IF_VAR (TYPE_MIN_VALUE (type
));
655 RETURN_TRUE_IF_VAR (TYPE_MAX_VALUE (type
));
659 if (remap_type_2 (TREE_TYPE (type
), id
)
660 || (TYPE_DOMAIN (type
) && remap_type_2 (TYPE_DOMAIN (type
), id
)))
666 case QUAL_UNION_TYPE
:
667 for (t
= TYPE_FIELDS (type
); t
; t
= DECL_CHAIN (t
))
668 if (TREE_CODE (t
) == FIELD_DECL
)
670 RETURN_TRUE_IF_VAR (DECL_FIELD_OFFSET (t
));
671 RETURN_TRUE_IF_VAR (DECL_SIZE (t
));
672 RETURN_TRUE_IF_VAR (DECL_SIZE_UNIT (t
));
673 if (TREE_CODE (type
) == QUAL_UNION_TYPE
)
674 RETURN_TRUE_IF_VAR (DECL_QUALIFIER (t
));
682 RETURN_TRUE_IF_VAR (TYPE_SIZE (type
));
683 RETURN_TRUE_IF_VAR (TYPE_SIZE_UNIT (type
));
685 #undef RETURN_TRUE_IF_VAR
689 remap_type (tree type
, copy_body_data
*id
)
697 /* See if we have remapped this type. */
698 node
= id
->decl_map
->get (type
);
702 /* The type only needs remapping if it's variably modified. */
703 if (! variably_modified_type_p (type
, id
->src_fn
)
704 /* Don't remap if copy_decl method doesn't always return a new
705 decl and for all embedded decls returns the passed in decl. */
706 || (id
->dont_remap_vla_if_no_change
&& !remap_type_2 (type
, id
)))
708 insert_decl_map (id
, type
, type
);
712 id
->remapping_type_depth
++;
713 tmp
= remap_type_1 (type
, id
);
714 id
->remapping_type_depth
--;
719 /* Decide if DECL can be put into BLOCK_NONLOCAL_VARs. */
722 can_be_nonlocal (tree decl
, copy_body_data
*id
)
724 /* We cannot duplicate function decls. */
725 if (TREE_CODE (decl
) == FUNCTION_DECL
)
728 /* Local static vars must be non-local or we get multiple declaration
730 if (VAR_P (decl
) && !auto_var_in_fn_p (decl
, id
->src_fn
))
737 remap_decls (tree decls
, vec
<tree
, va_gc
> **nonlocalized_list
,
741 tree new_decls
= NULL_TREE
;
743 /* Remap its variables. */
744 for (old_var
= decls
; old_var
; old_var
= DECL_CHAIN (old_var
))
748 if (can_be_nonlocal (old_var
, id
))
750 /* We need to add this variable to the local decls as otherwise
751 nothing else will do so. */
752 if (VAR_P (old_var
) && ! DECL_EXTERNAL (old_var
) && cfun
)
753 add_local_decl (cfun
, old_var
);
754 if ((!optimize
|| debug_info_level
> DINFO_LEVEL_TERSE
)
755 && !DECL_IGNORED_P (old_var
)
756 && nonlocalized_list
)
757 vec_safe_push (*nonlocalized_list
, old_var
);
761 /* Remap the variable. */
762 new_var
= remap_decl (old_var
, id
);
764 /* If we didn't remap this variable, we can't mess with its
765 TREE_CHAIN. If we remapped this variable to the return slot, it's
766 already declared somewhere else, so don't declare it here. */
768 if (new_var
== id
->retvar
)
772 if ((!optimize
|| debug_info_level
> DINFO_LEVEL_TERSE
)
773 && !DECL_IGNORED_P (old_var
)
774 && nonlocalized_list
)
775 vec_safe_push (*nonlocalized_list
, old_var
);
779 gcc_assert (DECL_P (new_var
));
780 DECL_CHAIN (new_var
) = new_decls
;
783 /* Also copy value-expressions. */
784 if (VAR_P (new_var
) && DECL_HAS_VALUE_EXPR_P (new_var
))
786 tree tem
= DECL_VALUE_EXPR (new_var
);
787 bool old_regimplify
= id
->regimplify
;
788 id
->remapping_type_depth
++;
789 walk_tree (&tem
, copy_tree_body_r
, id
, NULL
);
790 id
->remapping_type_depth
--;
791 id
->regimplify
= old_regimplify
;
792 SET_DECL_VALUE_EXPR (new_var
, tem
);
797 return nreverse (new_decls
);
800 /* Copy the BLOCK to contain remapped versions of the variables
801 therein. And hook the new block into the block-tree. */
804 remap_block (tree
*block
, copy_body_data
*id
)
809 /* Make the new block. */
811 new_block
= make_node (BLOCK
);
812 TREE_USED (new_block
) = TREE_USED (old_block
);
813 BLOCK_ABSTRACT_ORIGIN (new_block
) = BLOCK_ORIGIN (old_block
);
814 BLOCK_SOURCE_LOCATION (new_block
) = BLOCK_SOURCE_LOCATION (old_block
);
815 BLOCK_NONLOCALIZED_VARS (new_block
)
816 = vec_safe_copy (BLOCK_NONLOCALIZED_VARS (old_block
));
819 /* Remap its variables. */
820 BLOCK_VARS (new_block
) = remap_decls (BLOCK_VARS (old_block
),
821 &BLOCK_NONLOCALIZED_VARS (new_block
),
824 /* Remember the remapped block. */
825 insert_decl_map (id
, old_block
, new_block
);
828 /* Copy the whole block tree and root it in id->block. */
831 remap_blocks (tree block
, copy_body_data
*id
)
834 tree new_tree
= block
;
839 remap_block (&new_tree
, id
);
840 gcc_assert (new_tree
!= block
);
841 for (t
= BLOCK_SUBBLOCKS (block
); t
; t
= BLOCK_CHAIN (t
))
842 prepend_lexical_block (new_tree
, remap_blocks (t
, id
));
843 /* Blocks are in arbitrary order, but make things slightly prettier and do
844 not swap order when producing a copy. */
845 BLOCK_SUBBLOCKS (new_tree
) = blocks_nreverse (BLOCK_SUBBLOCKS (new_tree
));
849 /* Remap the block tree rooted at BLOCK to nothing. */
852 remap_blocks_to_null (tree block
, copy_body_data
*id
)
855 insert_decl_map (id
, block
, NULL_TREE
);
856 for (t
= BLOCK_SUBBLOCKS (block
); t
; t
= BLOCK_CHAIN (t
))
857 remap_blocks_to_null (t
, id
);
860 /* Remap the location info pointed to by LOCUS. */
863 remap_location (location_t locus
, copy_body_data
*id
)
865 if (LOCATION_BLOCK (locus
))
867 tree
*n
= id
->decl_map
->get (LOCATION_BLOCK (locus
));
870 return set_block (locus
, *n
);
873 locus
= LOCATION_LOCUS (locus
);
875 if (locus
!= UNKNOWN_LOCATION
&& id
->block
)
876 return set_block (locus
, id
->block
);
882 copy_statement_list (tree
*tp
)
884 tree_stmt_iterator oi
, ni
;
887 new_tree
= alloc_stmt_list ();
888 ni
= tsi_start (new_tree
);
889 oi
= tsi_start (*tp
);
890 TREE_TYPE (new_tree
) = TREE_TYPE (*tp
);
893 for (; !tsi_end_p (oi
); tsi_next (&oi
))
895 tree stmt
= tsi_stmt (oi
);
896 if (TREE_CODE (stmt
) == STATEMENT_LIST
)
897 /* This copy is not redundant; tsi_link_after will smash this
898 STATEMENT_LIST into the end of the one we're building, and we
899 don't want to do that with the original. */
900 copy_statement_list (&stmt
);
901 tsi_link_after (&ni
, stmt
, TSI_CONTINUE_LINKING
);
906 copy_bind_expr (tree
*tp
, int *walk_subtrees
, copy_body_data
*id
)
908 tree block
= BIND_EXPR_BLOCK (*tp
);
909 /* Copy (and replace) the statement. */
910 copy_tree_r (tp
, walk_subtrees
, NULL
);
913 remap_block (&block
, id
);
914 BIND_EXPR_BLOCK (*tp
) = block
;
917 if (BIND_EXPR_VARS (*tp
))
918 /* This will remap a lot of the same decls again, but this should be
920 BIND_EXPR_VARS (*tp
) = remap_decls (BIND_EXPR_VARS (*tp
), NULL
, id
);
924 /* Create a new gimple_seq by remapping all the statements in BODY
925 using the inlining information in ID. */
928 remap_gimple_seq (gimple_seq body
, copy_body_data
*id
)
930 gimple_stmt_iterator si
;
931 gimple_seq new_body
= NULL
;
933 for (si
= gsi_start (body
); !gsi_end_p (si
); gsi_next (&si
))
935 gimple_seq new_stmts
= remap_gimple_stmt (gsi_stmt (si
), id
);
936 gimple_seq_add_seq (&new_body
, new_stmts
);
943 /* Copy a GIMPLE_BIND statement STMT, remapping all the symbols in its
944 block using the mapping information in ID. */
947 copy_gimple_bind (gbind
*stmt
, copy_body_data
*id
)
950 tree new_block
, new_vars
;
951 gimple_seq body
, new_body
;
953 /* Copy the statement. Note that we purposely don't use copy_stmt
954 here because we need to remap statements as we copy. */
955 body
= gimple_bind_body (stmt
);
956 new_body
= remap_gimple_seq (body
, id
);
958 new_block
= gimple_bind_block (stmt
);
960 remap_block (&new_block
, id
);
962 /* This will remap a lot of the same decls again, but this should be
964 new_vars
= gimple_bind_vars (stmt
);
966 new_vars
= remap_decls (new_vars
, NULL
, id
);
968 new_bind
= gimple_build_bind (new_vars
, new_body
, new_block
);
973 /* Return true if DECL is a parameter or a SSA_NAME for a parameter. */
978 if (TREE_CODE (decl
) == SSA_NAME
)
980 decl
= SSA_NAME_VAR (decl
);
985 return (TREE_CODE (decl
) == PARM_DECL
);
988 /* Remap the dependence CLIQUE from the source to the destination function
989 as specified in ID. */
991 static unsigned short
992 remap_dependence_clique (copy_body_data
*id
, unsigned short clique
)
994 if (clique
== 0 || processing_debug_stmt
)
996 if (!id
->dependence_map
)
997 id
->dependence_map
= new hash_map
<dependence_hash
, unsigned short>;
999 unsigned short &newc
= id
->dependence_map
->get_or_insert (clique
, &existed
);
1002 /* Clique 1 is reserved for local ones set by PTA. */
1003 if (cfun
->last_clique
== 0)
1004 cfun
->last_clique
= 1;
1005 newc
= get_new_clique (cfun
);
1010 /* Remap the GIMPLE operand pointed to by *TP. DATA is really a
1011 'struct walk_stmt_info *'. DATA->INFO is a 'copy_body_data *'.
1012 WALK_SUBTREES is used to indicate walk_gimple_op whether to keep
1013 recursing into the children nodes of *TP. */
1016 remap_gimple_op_r (tree
*tp
, int *walk_subtrees
, void *data
)
1018 struct walk_stmt_info
*wi_p
= (struct walk_stmt_info
*) data
;
1019 copy_body_data
*id
= (copy_body_data
*) wi_p
->info
;
1020 tree fn
= id
->src_fn
;
1022 /* For recursive invocations this is no longer the LHS itself. */
1023 bool is_lhs
= wi_p
->is_lhs
;
1024 wi_p
->is_lhs
= false;
1026 if (TREE_CODE (*tp
) == SSA_NAME
)
1028 *tp
= remap_ssa_name (*tp
, id
);
1031 SSA_NAME_DEF_STMT (*tp
) = wi_p
->stmt
;
1034 else if (auto_var_in_fn_p (*tp
, fn
))
1036 /* Local variables and labels need to be replaced by equivalent
1037 variables. We don't want to copy static variables; there's
1038 only one of those, no matter how many times we inline the
1039 containing function. Similarly for globals from an outer
1043 /* Remap the declaration. */
1044 new_decl
= remap_decl (*tp
, id
);
1045 gcc_assert (new_decl
);
1046 /* Replace this variable with the copy. */
1047 STRIP_TYPE_NOPS (new_decl
);
1048 /* ??? The C++ frontend uses void * pointer zero to initialize
1049 any other type. This confuses the middle-end type verification.
1050 As cloned bodies do not go through gimplification again the fixup
1051 there doesn't trigger. */
1052 if (TREE_CODE (new_decl
) == INTEGER_CST
1053 && !useless_type_conversion_p (TREE_TYPE (*tp
), TREE_TYPE (new_decl
)))
1054 new_decl
= fold_convert (TREE_TYPE (*tp
), new_decl
);
1058 else if (TREE_CODE (*tp
) == STATEMENT_LIST
)
1060 else if (TREE_CODE (*tp
) == SAVE_EXPR
)
1062 else if (TREE_CODE (*tp
) == LABEL_DECL
1063 && (!DECL_CONTEXT (*tp
)
1064 || decl_function_context (*tp
) == id
->src_fn
))
1065 /* These may need to be remapped for EH handling. */
1066 *tp
= remap_decl (*tp
, id
);
1067 else if (TREE_CODE (*tp
) == FIELD_DECL
)
1069 /* If the enclosing record type is variably_modified_type_p, the field
1070 has already been remapped. Otherwise, it need not be. */
1071 tree
*n
= id
->decl_map
->get (*tp
);
1076 else if (TYPE_P (*tp
))
1077 /* Types may need remapping as well. */
1078 *tp
= remap_type (*tp
, id
);
1079 else if (CONSTANT_CLASS_P (*tp
))
1081 /* If this is a constant, we have to copy the node iff the type
1082 will be remapped. copy_tree_r will not copy a constant. */
1083 tree new_type
= remap_type (TREE_TYPE (*tp
), id
);
1085 if (new_type
== TREE_TYPE (*tp
))
1088 else if (TREE_CODE (*tp
) == INTEGER_CST
)
1089 *tp
= wide_int_to_tree (new_type
, wi::to_wide (*tp
));
1092 *tp
= copy_node (*tp
);
1093 TREE_TYPE (*tp
) = new_type
;
1098 /* Otherwise, just copy the node. Note that copy_tree_r already
1099 knows not to copy VAR_DECLs, etc., so this is safe. */
1101 if (TREE_CODE (*tp
) == MEM_REF
&& !id
->do_not_fold
)
1103 /* We need to re-canonicalize MEM_REFs from inline substitutions
1104 that can happen when a pointer argument is an ADDR_EXPR.
1105 Recurse here manually to allow that. */
1106 tree ptr
= TREE_OPERAND (*tp
, 0);
1107 tree type
= remap_type (TREE_TYPE (*tp
), id
);
1109 walk_tree (&ptr
, remap_gimple_op_r
, data
, NULL
);
1110 *tp
= fold_build2 (MEM_REF
, type
, ptr
, TREE_OPERAND (*tp
, 1));
1111 TREE_THIS_VOLATILE (*tp
) = TREE_THIS_VOLATILE (old
);
1112 TREE_SIDE_EFFECTS (*tp
) = TREE_SIDE_EFFECTS (old
);
1113 copy_warning (*tp
, old
);
1114 if (MR_DEPENDENCE_CLIQUE (old
) != 0)
1116 MR_DEPENDENCE_CLIQUE (*tp
)
1117 = remap_dependence_clique (id
, MR_DEPENDENCE_CLIQUE (old
));
1118 MR_DEPENDENCE_BASE (*tp
) = MR_DEPENDENCE_BASE (old
);
1120 /* We cannot propagate the TREE_THIS_NOTRAP flag if we have
1121 remapped a parameter as the property might be valid only
1122 for the parameter itself. */
1123 if (TREE_THIS_NOTRAP (old
)
1124 && (!is_parm (TREE_OPERAND (old
, 0))
1125 || (!id
->transform_parameter
&& is_parm (ptr
))))
1126 TREE_THIS_NOTRAP (*tp
) = 1;
1127 REF_REVERSE_STORAGE_ORDER (*tp
) = REF_REVERSE_STORAGE_ORDER (old
);
1132 /* Here is the "usual case". Copy this tree node, and then
1133 tweak some special cases. */
1134 copy_tree_r (tp
, walk_subtrees
, NULL
);
1136 if (TREE_CODE (*tp
) != OMP_CLAUSE
)
1137 TREE_TYPE (*tp
) = remap_type (TREE_TYPE (*tp
), id
);
1139 if (TREE_CODE (*tp
) == TARGET_EXPR
&& TREE_OPERAND (*tp
, 3))
1141 /* The copied TARGET_EXPR has never been expanded, even if the
1142 original node was expanded already. */
1143 TREE_OPERAND (*tp
, 1) = TREE_OPERAND (*tp
, 3);
1144 TREE_OPERAND (*tp
, 3) = NULL_TREE
;
1146 else if (TREE_CODE (*tp
) == ADDR_EXPR
)
1148 /* Variable substitution need not be simple. In particular,
1149 the MEM_REF substitution above. Make sure that
1150 TREE_CONSTANT and friends are up-to-date. */
1151 int invariant
= is_gimple_min_invariant (*tp
);
1152 walk_tree (&TREE_OPERAND (*tp
, 0), remap_gimple_op_r
, data
, NULL
);
1153 recompute_tree_invariant_for_addr_expr (*tp
);
1155 /* If this used to be invariant, but is not any longer,
1156 then regimplification is probably needed. */
1157 if (invariant
&& !is_gimple_min_invariant (*tp
))
1158 id
->regimplify
= true;
1164 /* Update the TREE_BLOCK for the cloned expr. */
1167 tree new_block
= id
->remapping_type_depth
== 0 ? id
->block
: NULL
;
1168 tree old_block
= TREE_BLOCK (*tp
);
1172 n
= id
->decl_map
->get (TREE_BLOCK (*tp
));
1176 TREE_SET_BLOCK (*tp
, new_block
);
1179 /* Keep iterating. */
1184 /* Called from copy_body_id via walk_tree. DATA is really a
1185 `copy_body_data *'. */
1188 copy_tree_body_r (tree
*tp
, int *walk_subtrees
, void *data
)
1190 copy_body_data
*id
= (copy_body_data
*) data
;
1191 tree fn
= id
->src_fn
;
1194 /* Begin by recognizing trees that we'll completely rewrite for the
1195 inlining context. Our output for these trees is completely
1196 different from out input (e.g. RETURN_EXPR is deleted, and morphs
1197 into an edge). Further down, we'll handle trees that get
1198 duplicated and/or tweaked. */
1200 /* When requested, RETURN_EXPRs should be transformed to just the
1201 contained MODIFY_EXPR. The branch semantics of the return will
1202 be handled elsewhere by manipulating the CFG rather than a statement. */
1203 if (TREE_CODE (*tp
) == RETURN_EXPR
&& id
->transform_return_to_modify
)
1205 tree assignment
= TREE_OPERAND (*tp
, 0);
1207 /* If we're returning something, just turn that into an
1208 assignment into the equivalent of the original RESULT_DECL.
1209 If the "assignment" is just the result decl, the result
1210 decl has already been set (e.g. a recent "foo (&result_decl,
1211 ...)"); just toss the entire RETURN_EXPR. */
1212 if (assignment
&& TREE_CODE (assignment
) == MODIFY_EXPR
)
1214 /* Replace the RETURN_EXPR with (a copy of) the
1215 MODIFY_EXPR hanging underneath. */
1216 *tp
= copy_node (assignment
);
1218 else /* Else the RETURN_EXPR returns no value. */
1221 return (tree
) (void *)1;
1224 else if (TREE_CODE (*tp
) == SSA_NAME
)
1226 *tp
= remap_ssa_name (*tp
, id
);
1231 /* Local variables and labels need to be replaced by equivalent
1232 variables. We don't want to copy static variables; there's only
1233 one of those, no matter how many times we inline the containing
1234 function. Similarly for globals from an outer function. */
1235 else if (auto_var_in_fn_p (*tp
, fn
))
1239 /* Remap the declaration. */
1240 new_decl
= remap_decl (*tp
, id
);
1241 gcc_assert (new_decl
);
1242 /* Replace this variable with the copy. */
1243 STRIP_TYPE_NOPS (new_decl
);
1247 else if (TREE_CODE (*tp
) == STATEMENT_LIST
)
1248 copy_statement_list (tp
);
1249 else if (TREE_CODE (*tp
) == SAVE_EXPR
1250 || TREE_CODE (*tp
) == TARGET_EXPR
)
1251 remap_save_expr (tp
, id
->decl_map
, walk_subtrees
);
1252 else if (TREE_CODE (*tp
) == LABEL_DECL
1253 && (! DECL_CONTEXT (*tp
)
1254 || decl_function_context (*tp
) == id
->src_fn
))
1255 /* These may need to be remapped for EH handling. */
1256 *tp
= remap_decl (*tp
, id
);
1257 else if (TREE_CODE (*tp
) == BIND_EXPR
)
1258 copy_bind_expr (tp
, walk_subtrees
, id
);
1259 /* Types may need remapping as well. */
1260 else if (TYPE_P (*tp
))
1261 *tp
= remap_type (*tp
, id
);
1263 /* If this is a constant, we have to copy the node iff the type will be
1264 remapped. copy_tree_r will not copy a constant. */
1265 else if (CONSTANT_CLASS_P (*tp
))
1267 tree new_type
= remap_type (TREE_TYPE (*tp
), id
);
1269 if (new_type
== TREE_TYPE (*tp
))
1272 else if (TREE_CODE (*tp
) == INTEGER_CST
)
1273 *tp
= wide_int_to_tree (new_type
, wi::to_wide (*tp
));
1276 *tp
= copy_node (*tp
);
1277 TREE_TYPE (*tp
) = new_type
;
1281 /* Otherwise, just copy the node. Note that copy_tree_r already
1282 knows not to copy VAR_DECLs, etc., so this is safe. */
1285 /* Here we handle trees that are not completely rewritten.
1286 First we detect some inlining-induced bogosities for
1288 if (TREE_CODE (*tp
) == MODIFY_EXPR
1289 && TREE_OPERAND (*tp
, 0) == TREE_OPERAND (*tp
, 1)
1290 && (auto_var_in_fn_p (TREE_OPERAND (*tp
, 0), fn
)))
1292 /* Some assignments VAR = VAR; don't generate any rtl code
1293 and thus don't count as variable modification. Avoid
1294 keeping bogosities like 0 = 0. */
1295 tree decl
= TREE_OPERAND (*tp
, 0), value
;
1298 n
= id
->decl_map
->get (decl
);
1302 STRIP_TYPE_NOPS (value
);
1303 if (TREE_CONSTANT (value
) || TREE_READONLY (value
))
1305 *tp
= build_empty_stmt (EXPR_LOCATION (*tp
));
1306 return copy_tree_body_r (tp
, walk_subtrees
, data
);
1310 else if (INDIRECT_REF_P (*tp
))
1312 /* Get rid of *& from inline substitutions that can happen when a
1313 pointer argument is an ADDR_EXPR. */
1314 tree decl
= TREE_OPERAND (*tp
, 0);
1315 tree
*n
= id
->decl_map
->get (decl
);
1318 /* If we happen to get an ADDR_EXPR in n->value, strip
1319 it manually here as we'll eventually get ADDR_EXPRs
1320 which lie about their types pointed to. In this case
1321 build_fold_indirect_ref wouldn't strip the INDIRECT_REF,
1322 but we absolutely rely on that. As fold_indirect_ref
1323 does other useful transformations, try that first, though. */
1324 tree type
= TREE_TYPE (*tp
);
1325 tree ptr
= id
->do_not_unshare
? *n
: unshare_expr (*n
);
1327 *tp
= id
->do_not_fold
? NULL
: gimple_fold_indirect_ref (ptr
);
1330 type
= remap_type (type
, id
);
1331 if (TREE_CODE (ptr
) == ADDR_EXPR
&& !id
->do_not_fold
)
1334 = fold_indirect_ref_1 (EXPR_LOCATION (ptr
), type
, ptr
);
1335 /* ??? We should either assert here or build
1336 a VIEW_CONVERT_EXPR instead of blindly leaking
1337 incompatible types to our IL. */
1339 *tp
= TREE_OPERAND (ptr
, 0);
1343 *tp
= build1 (INDIRECT_REF
, type
, ptr
);
1344 TREE_THIS_VOLATILE (*tp
) = TREE_THIS_VOLATILE (old
);
1345 TREE_SIDE_EFFECTS (*tp
) = TREE_SIDE_EFFECTS (old
);
1346 TREE_READONLY (*tp
) = TREE_READONLY (old
);
1347 /* We cannot propagate the TREE_THIS_NOTRAP flag if we
1348 have remapped a parameter as the property might be
1349 valid only for the parameter itself. */
1350 if (TREE_THIS_NOTRAP (old
)
1351 && (!is_parm (TREE_OPERAND (old
, 0))
1352 || (!id
->transform_parameter
&& is_parm (ptr
))))
1353 TREE_THIS_NOTRAP (*tp
) = 1;
1360 else if (TREE_CODE (*tp
) == MEM_REF
&& !id
->do_not_fold
)
1362 /* We need to re-canonicalize MEM_REFs from inline substitutions
1363 that can happen when a pointer argument is an ADDR_EXPR.
1364 Recurse here manually to allow that. */
1365 tree ptr
= TREE_OPERAND (*tp
, 0);
1366 tree type
= remap_type (TREE_TYPE (*tp
), id
);
1368 walk_tree (&ptr
, copy_tree_body_r
, data
, NULL
);
1369 *tp
= fold_build2 (MEM_REF
, type
, ptr
, TREE_OPERAND (*tp
, 1));
1370 TREE_THIS_VOLATILE (*tp
) = TREE_THIS_VOLATILE (old
);
1371 TREE_SIDE_EFFECTS (*tp
) = TREE_SIDE_EFFECTS (old
);
1372 copy_warning (*tp
, old
);
1373 if (MR_DEPENDENCE_CLIQUE (old
) != 0)
1375 MR_DEPENDENCE_CLIQUE (*tp
)
1376 = remap_dependence_clique (id
, MR_DEPENDENCE_CLIQUE (old
));
1377 MR_DEPENDENCE_BASE (*tp
) = MR_DEPENDENCE_BASE (old
);
1379 /* We cannot propagate the TREE_THIS_NOTRAP flag if we have
1380 remapped a parameter as the property might be valid only
1381 for the parameter itself. */
1382 if (TREE_THIS_NOTRAP (old
)
1383 && (!is_parm (TREE_OPERAND (old
, 0))
1384 || (!id
->transform_parameter
&& is_parm (ptr
))))
1385 TREE_THIS_NOTRAP (*tp
) = 1;
1386 REF_REVERSE_STORAGE_ORDER (*tp
) = REF_REVERSE_STORAGE_ORDER (old
);
1391 /* Here is the "usual case". Copy this tree node, and then
1392 tweak some special cases. */
1393 copy_tree_r (tp
, walk_subtrees
, NULL
);
1395 /* If EXPR has block defined, map it to newly constructed block.
1396 When inlining we want EXPRs without block appear in the block
1397 of function call if we are not remapping a type. */
1400 new_block
= id
->remapping_type_depth
== 0 ? id
->block
: NULL
;
1401 if (TREE_BLOCK (*tp
))
1404 n
= id
->decl_map
->get (TREE_BLOCK (*tp
));
1408 TREE_SET_BLOCK (*tp
, new_block
);
1411 if (TREE_CODE (*tp
) != OMP_CLAUSE
)
1412 TREE_TYPE (*tp
) = remap_type (TREE_TYPE (*tp
), id
);
1414 /* The copied TARGET_EXPR has never been expanded, even if the
1415 original node was expanded already. */
1416 if (TREE_CODE (*tp
) == TARGET_EXPR
&& TREE_OPERAND (*tp
, 3))
1418 TREE_OPERAND (*tp
, 1) = TREE_OPERAND (*tp
, 3);
1419 TREE_OPERAND (*tp
, 3) = NULL_TREE
;
1422 /* Variable substitution need not be simple. In particular, the
1423 INDIRECT_REF substitution above. Make sure that TREE_CONSTANT
1424 and friends are up-to-date. */
1425 else if (TREE_CODE (*tp
) == ADDR_EXPR
)
1427 int invariant
= is_gimple_min_invariant (*tp
);
1428 walk_tree (&TREE_OPERAND (*tp
, 0), copy_tree_body_r
, id
, NULL
);
1430 /* Handle the case where we substituted an INDIRECT_REF
1431 into the operand of the ADDR_EXPR. */
1432 if (INDIRECT_REF_P (TREE_OPERAND (*tp
, 0))
1433 && !id
->do_not_fold
)
1435 tree t
= TREE_OPERAND (TREE_OPERAND (*tp
, 0), 0);
1436 if (TREE_TYPE (t
) != TREE_TYPE (*tp
))
1437 t
= fold_convert (remap_type (TREE_TYPE (*tp
), id
), t
);
1441 recompute_tree_invariant_for_addr_expr (*tp
);
1443 /* If this used to be invariant, but is not any longer,
1444 then regimplification is probably needed. */
1445 if (invariant
&& !is_gimple_min_invariant (*tp
))
1446 id
->regimplify
= true;
1450 else if (TREE_CODE (*tp
) == OMP_CLAUSE
1451 && (OMP_CLAUSE_CODE (*tp
) == OMP_CLAUSE_AFFINITY
1452 || OMP_CLAUSE_CODE (*tp
) == OMP_CLAUSE_DEPEND
))
1454 tree t
= OMP_CLAUSE_DECL (*tp
);
1456 && TREE_CODE (t
) == TREE_LIST
1458 && TREE_CODE (TREE_PURPOSE (t
)) == TREE_VEC
)
1461 OMP_CLAUSE_DECL (*tp
) = copy_node (t
);
1462 t
= OMP_CLAUSE_DECL (*tp
);
1463 TREE_PURPOSE (t
) = copy_node (TREE_PURPOSE (t
));
1464 for (int i
= 0; i
<= 4; i
++)
1465 walk_tree (&TREE_VEC_ELT (TREE_PURPOSE (t
), i
),
1466 copy_tree_body_r
, id
, NULL
);
1467 if (TREE_VEC_ELT (TREE_PURPOSE (t
), 5))
1468 remap_block (&TREE_VEC_ELT (TREE_PURPOSE (t
), 5), id
);
1469 walk_tree (&TREE_VALUE (t
), copy_tree_body_r
, id
, NULL
);
1474 /* Keep iterating. */
1478 /* Helper for remap_gimple_stmt. Given an EH region number for the
1479 source function, map that to the duplicate EH region number in
1480 the destination function. */
1483 remap_eh_region_nr (int old_nr
, copy_body_data
*id
)
1485 eh_region old_r
, new_r
;
1487 old_r
= get_eh_region_from_number_fn (id
->src_cfun
, old_nr
);
1488 new_r
= static_cast<eh_region
> (*id
->eh_map
->get (old_r
));
1490 return new_r
->index
;
1493 /* Similar, but operate on INTEGER_CSTs. */
1496 remap_eh_region_tree_nr (tree old_t_nr
, copy_body_data
*id
)
1500 old_nr
= tree_to_shwi (old_t_nr
);
1501 new_nr
= remap_eh_region_nr (old_nr
, id
);
1503 return build_int_cst (integer_type_node
, new_nr
);
1506 /* Helper for copy_bb. Remap statement STMT using the inlining
1507 information in ID. Return the new statement copy. */
1510 remap_gimple_stmt (gimple
*stmt
, copy_body_data
*id
)
1512 gimple
*copy
= NULL
;
1513 struct walk_stmt_info wi
;
1514 bool skip_first
= false;
1515 gimple_seq stmts
= NULL
;
1517 if (is_gimple_debug (stmt
)
1518 && (gimple_debug_nonbind_marker_p (stmt
)
1519 ? !DECL_STRUCT_FUNCTION (id
->dst_fn
)->debug_nonbind_markers
1520 : !opt_for_fn (id
->dst_fn
, flag_var_tracking_assignments
)))
1523 if (!is_gimple_debug (stmt
)
1524 && id
->param_body_adjs
1525 && id
->param_body_adjs
->m_dead_stmts
.contains (stmt
))
1527 tree
*dval
= id
->param_body_adjs
->m_dead_stmt_debug_equiv
.get (stmt
);
1531 gcc_assert (is_gimple_assign (stmt
));
1532 tree lhs
= gimple_assign_lhs (stmt
);
1533 tree
*dvar
= id
->param_body_adjs
->m_dead_ssa_debug_equiv
.get (lhs
);
1534 gdebug
*bind
= gimple_build_debug_bind (*dvar
, *dval
, stmt
);
1535 if (id
->reset_location
)
1536 gimple_set_location (bind
, input_location
);
1537 id
->debug_stmts
.safe_push (bind
);
1538 gimple_seq_add_stmt_without_update (&stmts
, bind
);
1542 /* Begin by recognizing trees that we'll completely rewrite for the
1543 inlining context. Our output for these trees is completely
1544 different from our input (e.g. RETURN_EXPR is deleted and morphs
1545 into an edge). Further down, we'll handle trees that get
1546 duplicated and/or tweaked. */
1548 /* When requested, GIMPLE_RETURN should be transformed to just the
1549 contained GIMPLE_ASSIGN. The branch semantics of the return will
1550 be handled elsewhere by manipulating the CFG rather than the
1552 if (gimple_code (stmt
) == GIMPLE_RETURN
&& id
->transform_return_to_modify
)
1554 tree retval
= gimple_return_retval (as_a
<greturn
*> (stmt
));
1556 /* If we're returning something, just turn that into an
1557 assignment to the equivalent of the original RESULT_DECL.
1558 If RETVAL is just the result decl, the result decl has
1559 already been set (e.g. a recent "foo (&result_decl, ...)");
1560 just toss the entire GIMPLE_RETURN. Likewise for when the
1561 call doesn't want the return value. */
1563 && (TREE_CODE (retval
) != RESULT_DECL
1565 || gimple_call_lhs (id
->call_stmt
) != NULL_TREE
)
1566 && (TREE_CODE (retval
) != SSA_NAME
1567 || ! SSA_NAME_VAR (retval
)
1568 || TREE_CODE (SSA_NAME_VAR (retval
)) != RESULT_DECL
)))
1570 copy
= gimple_build_assign (id
->do_not_unshare
1571 ? id
->retvar
: unshare_expr (id
->retvar
),
1573 /* id->retvar is already substituted. Skip it on later remapping. */
1579 else if (gimple_has_substatements (stmt
))
1583 /* When cloning bodies from the C++ front end, we will be handed bodies
1584 in High GIMPLE form. Handle here all the High GIMPLE statements that
1585 have embedded statements. */
1586 switch (gimple_code (stmt
))
1589 copy
= copy_gimple_bind (as_a
<gbind
*> (stmt
), id
);
1594 gcatch
*catch_stmt
= as_a
<gcatch
*> (stmt
);
1595 s1
= remap_gimple_seq (gimple_catch_handler (catch_stmt
), id
);
1596 copy
= gimple_build_catch (gimple_catch_types (catch_stmt
), s1
);
1600 case GIMPLE_EH_FILTER
:
1601 s1
= remap_gimple_seq (gimple_eh_filter_failure (stmt
), id
);
1602 copy
= gimple_build_eh_filter (gimple_eh_filter_types (stmt
), s1
);
1606 s1
= remap_gimple_seq (gimple_try_eval (stmt
), id
);
1607 s2
= remap_gimple_seq (gimple_try_cleanup (stmt
), id
);
1608 copy
= gimple_build_try (s1
, s2
, gimple_try_kind (stmt
));
1611 case GIMPLE_WITH_CLEANUP_EXPR
:
1612 s1
= remap_gimple_seq (gimple_wce_cleanup (stmt
), id
);
1613 copy
= gimple_build_wce (s1
);
1616 case GIMPLE_OMP_PARALLEL
:
1618 gomp_parallel
*omp_par_stmt
= as_a
<gomp_parallel
*> (stmt
);
1619 s1
= remap_gimple_seq (gimple_omp_body (omp_par_stmt
), id
);
1620 copy
= gimple_build_omp_parallel
1622 gimple_omp_parallel_clauses (omp_par_stmt
),
1623 gimple_omp_parallel_child_fn (omp_par_stmt
),
1624 gimple_omp_parallel_data_arg (omp_par_stmt
));
1628 case GIMPLE_OMP_TASK
:
1629 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1630 copy
= gimple_build_omp_task
1632 gimple_omp_task_clauses (stmt
),
1633 gimple_omp_task_child_fn (stmt
),
1634 gimple_omp_task_data_arg (stmt
),
1635 gimple_omp_task_copy_fn (stmt
),
1636 gimple_omp_task_arg_size (stmt
),
1637 gimple_omp_task_arg_align (stmt
));
1640 case GIMPLE_OMP_FOR
:
1641 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1642 s2
= remap_gimple_seq (gimple_omp_for_pre_body (stmt
), id
);
1643 copy
= gimple_build_omp_for (s1
, gimple_omp_for_kind (stmt
),
1644 gimple_omp_for_clauses (stmt
),
1645 gimple_omp_for_collapse (stmt
), s2
);
1648 for (i
= 0; i
< gimple_omp_for_collapse (stmt
); i
++)
1650 gimple_omp_for_set_index (copy
, i
,
1651 gimple_omp_for_index (stmt
, i
));
1652 gimple_omp_for_set_initial (copy
, i
,
1653 gimple_omp_for_initial (stmt
, i
));
1654 gimple_omp_for_set_final (copy
, i
,
1655 gimple_omp_for_final (stmt
, i
));
1656 gimple_omp_for_set_incr (copy
, i
,
1657 gimple_omp_for_incr (stmt
, i
));
1658 gimple_omp_for_set_cond (copy
, i
,
1659 gimple_omp_for_cond (stmt
, i
));
1664 case GIMPLE_OMP_MASTER
:
1665 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1666 copy
= gimple_build_omp_master (s1
);
1669 case GIMPLE_OMP_MASKED
:
1670 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1671 copy
= gimple_build_omp_masked
1672 (s1
, gimple_omp_masked_clauses (stmt
));
1675 case GIMPLE_OMP_SCOPE
:
1676 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1677 copy
= gimple_build_omp_scope
1678 (s1
, gimple_omp_scope_clauses (stmt
));
1681 case GIMPLE_OMP_TASKGROUP
:
1682 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1683 copy
= gimple_build_omp_taskgroup
1684 (s1
, gimple_omp_taskgroup_clauses (stmt
));
1687 case GIMPLE_OMP_ORDERED
:
1688 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1689 copy
= gimple_build_omp_ordered
1691 gimple_omp_ordered_clauses (as_a
<gomp_ordered
*> (stmt
)));
1694 case GIMPLE_OMP_SCAN
:
1695 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1696 copy
= gimple_build_omp_scan
1697 (s1
, gimple_omp_scan_clauses (as_a
<gomp_scan
*> (stmt
)));
1700 case GIMPLE_OMP_SECTION
:
1701 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1702 copy
= gimple_build_omp_section (s1
);
1705 case GIMPLE_OMP_SECTIONS
:
1706 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1707 copy
= gimple_build_omp_sections
1708 (s1
, gimple_omp_sections_clauses (stmt
));
1711 case GIMPLE_OMP_STRUCTURED_BLOCK
:
1712 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1713 copy
= gimple_build_omp_structured_block (s1
);
1716 case GIMPLE_OMP_SINGLE
:
1717 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1718 copy
= gimple_build_omp_single
1719 (s1
, gimple_omp_single_clauses (stmt
));
1722 case GIMPLE_OMP_TARGET
:
1723 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1724 copy
= gimple_build_omp_target
1725 (s1
, gimple_omp_target_kind (stmt
),
1726 gimple_omp_target_clauses (stmt
));
1729 case GIMPLE_OMP_TEAMS
:
1730 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1731 copy
= gimple_build_omp_teams
1732 (s1
, gimple_omp_teams_clauses (stmt
));
1735 case GIMPLE_OMP_CRITICAL
:
1736 s1
= remap_gimple_seq (gimple_omp_body (stmt
), id
);
1737 copy
= gimple_build_omp_critical (s1
,
1738 gimple_omp_critical_name
1739 (as_a
<gomp_critical
*> (stmt
)),
1740 gimple_omp_critical_clauses
1741 (as_a
<gomp_critical
*> (stmt
)));
1745 s1
= remap_gimple_seq (gimple_assume_body (stmt
), id
);
1746 copy
= gimple_build_assume (gimple_assume_guard (stmt
), s1
);
1749 case GIMPLE_TRANSACTION
:
1751 gtransaction
*old_trans_stmt
= as_a
<gtransaction
*> (stmt
);
1752 gtransaction
*new_trans_stmt
;
1753 s1
= remap_gimple_seq (gimple_transaction_body (old_trans_stmt
),
1755 copy
= new_trans_stmt
= gimple_build_transaction (s1
);
1756 gimple_transaction_set_subcode (new_trans_stmt
,
1757 gimple_transaction_subcode (old_trans_stmt
));
1758 gimple_transaction_set_label_norm (new_trans_stmt
,
1759 gimple_transaction_label_norm (old_trans_stmt
));
1760 gimple_transaction_set_label_uninst (new_trans_stmt
,
1761 gimple_transaction_label_uninst (old_trans_stmt
));
1762 gimple_transaction_set_label_over (new_trans_stmt
,
1763 gimple_transaction_label_over (old_trans_stmt
));
1773 if (gimple_assign_single_p (stmt
)
1774 && gimple_assign_lhs (stmt
) == gimple_assign_rhs1 (stmt
)
1775 && auto_var_in_fn_p (gimple_assign_lhs (stmt
), id
->src_fn
))
1777 /* Here we handle statements that are not completely rewritten.
1778 First we detect some inlining-induced bogosities for
1781 /* Some assignments VAR = VAR; don't generate any rtl code
1782 and thus don't count as variable modification. Avoid
1783 keeping bogosities like 0 = 0. */
1784 tree decl
= gimple_assign_lhs (stmt
), value
;
1787 n
= id
->decl_map
->get (decl
);
1791 STRIP_TYPE_NOPS (value
);
1792 if (TREE_CONSTANT (value
) || TREE_READONLY (value
))
1797 /* For *ptr_N ={v} {CLOBBER}, if ptr_N is SSA_NAME defined
1798 in a block that we aren't copying during tree_function_versioning,
1799 just drop the clobber stmt. */
1800 if (id
->blocks_to_copy
&& gimple_clobber_p (stmt
))
1802 tree lhs
= gimple_assign_lhs (stmt
);
1803 if (TREE_CODE (lhs
) == MEM_REF
1804 && TREE_CODE (TREE_OPERAND (lhs
, 0)) == SSA_NAME
)
1806 gimple
*def_stmt
= SSA_NAME_DEF_STMT (TREE_OPERAND (lhs
, 0));
1807 if (gimple_bb (def_stmt
)
1808 && !bitmap_bit_p (id
->blocks_to_copy
,
1809 gimple_bb (def_stmt
)->index
))
1814 /* We do not allow CLOBBERs of handled components. In case
1815 returned value is stored via such handled component, remove
1816 the clobber so stmt verifier is happy. */
1817 if (gimple_clobber_p (stmt
)
1818 && TREE_CODE (gimple_assign_lhs (stmt
)) == RESULT_DECL
)
1820 tree remapped
= remap_decl (gimple_assign_lhs (stmt
), id
);
1821 if (!DECL_P (remapped
)
1822 && TREE_CODE (remapped
) != MEM_REF
)
1826 if (gimple_debug_bind_p (stmt
))
1828 tree var
= gimple_debug_bind_get_var (stmt
);
1829 tree value
= gimple_debug_bind_get_value (stmt
);
1830 if (id
->param_body_adjs
1831 && id
->param_body_adjs
->m_dead_stmts
.contains (stmt
))
1833 value
= unshare_expr_without_location (value
);
1834 id
->param_body_adjs
->remap_with_debug_expressions (&value
);
1837 gdebug
*copy
= gimple_build_debug_bind (var
, value
, stmt
);
1838 if (id
->reset_location
)
1839 gimple_set_location (copy
, input_location
);
1840 id
->debug_stmts
.safe_push (copy
);
1841 gimple_seq_add_stmt_without_update (&stmts
, copy
);
1844 if (gimple_debug_source_bind_p (stmt
))
1846 gdebug
*copy
= gimple_build_debug_source_bind
1847 (gimple_debug_source_bind_get_var (stmt
),
1848 gimple_debug_source_bind_get_value (stmt
),
1850 if (id
->reset_location
)
1851 gimple_set_location (copy
, input_location
);
1852 id
->debug_stmts
.safe_push (copy
);
1853 gimple_seq_add_stmt_without_update (&stmts
, copy
);
1856 if (gimple_debug_nonbind_marker_p (stmt
))
1858 /* If the inlined function has too many debug markers,
1860 if (id
->src_cfun
->debug_marker_count
1861 > param_max_debug_marker_count
1862 || id
->reset_location
)
1865 gdebug
*copy
= as_a
<gdebug
*> (gimple_copy (stmt
));
1866 id
->debug_stmts
.safe_push (copy
);
1867 gimple_seq_add_stmt_without_update (&stmts
, copy
);
1871 /* Create a new deep copy of the statement. */
1872 copy
= gimple_copy (stmt
);
1874 /* Clear flags that need revisiting. */
1875 if (gcall
*call_stmt
= dyn_cast
<gcall
*> (copy
))
1877 if (gimple_call_tail_p (call_stmt
))
1878 gimple_call_set_tail (call_stmt
, false);
1879 if (gimple_call_from_thunk_p (call_stmt
))
1880 gimple_call_set_from_thunk (call_stmt
, false);
1881 if (gimple_call_internal_p (call_stmt
))
1882 switch (gimple_call_internal_fn (call_stmt
))
1884 case IFN_GOMP_SIMD_LANE
:
1885 case IFN_GOMP_SIMD_VF
:
1886 case IFN_GOMP_SIMD_LAST_LANE
:
1887 case IFN_GOMP_SIMD_ORDERED_START
:
1888 case IFN_GOMP_SIMD_ORDERED_END
:
1889 DECL_STRUCT_FUNCTION (id
->dst_fn
)->has_simduid_loops
= true;
1896 /* Remap the region numbers for __builtin_eh_{pointer,filter},
1897 RESX and EH_DISPATCH. */
1899 switch (gimple_code (copy
))
1903 tree r
, fndecl
= gimple_call_fndecl (copy
);
1904 if (fndecl
&& fndecl_built_in_p (fndecl
, BUILT_IN_NORMAL
))
1905 switch (DECL_FUNCTION_CODE (fndecl
))
1907 case BUILT_IN_EH_COPY_VALUES
:
1908 r
= gimple_call_arg (copy
, 1);
1909 r
= remap_eh_region_tree_nr (r
, id
);
1910 gimple_call_set_arg (copy
, 1, r
);
1913 case BUILT_IN_EH_POINTER
:
1914 case BUILT_IN_EH_FILTER
:
1915 r
= gimple_call_arg (copy
, 0);
1916 r
= remap_eh_region_tree_nr (r
, id
);
1917 gimple_call_set_arg (copy
, 0, r
);
1924 /* Reset alias info if we didn't apply measures to
1925 keep it valid over inlining by setting DECL_PT_UID. */
1926 if (!id
->src_cfun
->gimple_df
1927 || !id
->src_cfun
->gimple_df
->ipa_pta
)
1928 gimple_call_reset_alias_info (as_a
<gcall
*> (copy
));
1934 gresx
*resx_stmt
= as_a
<gresx
*> (copy
);
1935 int r
= gimple_resx_region (resx_stmt
);
1936 r
= remap_eh_region_nr (r
, id
);
1937 gimple_resx_set_region (resx_stmt
, r
);
1941 case GIMPLE_EH_DISPATCH
:
1943 geh_dispatch
*eh_dispatch
= as_a
<geh_dispatch
*> (copy
);
1944 int r
= gimple_eh_dispatch_region (eh_dispatch
);
1945 r
= remap_eh_region_nr (r
, id
);
1946 gimple_eh_dispatch_set_region (eh_dispatch
, r
);
1955 /* If STMT has a block defined, map it to the newly constructed block. */
1956 if (tree block
= gimple_block (copy
))
1959 n
= id
->decl_map
->get (block
);
1961 gimple_set_block (copy
, *n
);
1963 if (id
->param_body_adjs
)
1965 gimple_seq extra_stmts
= NULL
;
1966 id
->param_body_adjs
->modify_gimple_stmt (©
, &extra_stmts
, stmt
);
1967 if (!gimple_seq_empty_p (extra_stmts
))
1969 memset (&wi
, 0, sizeof (wi
));
1971 for (gimple_stmt_iterator egsi
= gsi_start (extra_stmts
);
1974 walk_gimple_op (gsi_stmt (egsi
), remap_gimple_op_r
, &wi
);
1975 gimple_seq_add_seq_without_update (&stmts
, extra_stmts
);
1979 if (id
->reset_location
)
1980 gimple_set_location (copy
, input_location
);
1982 /* Debug statements ought to be rebuilt and not copied. */
1983 gcc_checking_assert (!is_gimple_debug (copy
));
1985 /* Remap all the operands in COPY. */
1986 memset (&wi
, 0, sizeof (wi
));
1989 walk_tree (gimple_op_ptr (copy
, 1), remap_gimple_op_r
, &wi
, NULL
);
1991 walk_gimple_op (copy
, remap_gimple_op_r
, &wi
);
1993 /* Clear the copied virtual operands. We are not remapping them here
1994 but are going to recreate them from scratch. */
1995 if (gimple_has_mem_ops (copy
))
1997 gimple_set_vdef (copy
, NULL_TREE
);
1998 gimple_set_vuse (copy
, NULL_TREE
);
2001 if (cfun
->can_throw_non_call_exceptions
)
2003 /* When inlining a function which does not have non-call exceptions
2004 enabled into a function that has (which only happens with
2005 always-inline) we have to fixup stmts that cannot throw. */
2006 if (gcond
*cond
= dyn_cast
<gcond
*> (copy
))
2007 if (gimple_could_trap_p (cond
))
2010 = gimple_build_assign (make_ssa_name (boolean_type_node
),
2011 gimple_cond_code (cond
),
2012 gimple_cond_lhs (cond
),
2013 gimple_cond_rhs (cond
));
2014 gimple_seq_add_stmt_without_update (&stmts
, cmp
);
2015 gimple_cond_set_code (cond
, NE_EXPR
);
2016 gimple_cond_set_lhs (cond
, gimple_assign_lhs (cmp
));
2017 gimple_cond_set_rhs (cond
, boolean_false_node
);
2021 gimple_seq_add_stmt_without_update (&stmts
, copy
);
2026 /* Copy basic block, scale profile accordingly. Edges will be taken care of
2030 copy_bb (copy_body_data
*id
, basic_block bb
,
2031 profile_count num
, profile_count den
)
2033 gimple_stmt_iterator gsi
, copy_gsi
, seq_gsi
;
2034 basic_block copy_basic_block
;
2038 profile_count::adjust_for_ipa_scaling (&num
, &den
);
2040 /* Search for previous copied basic block. */
2043 prev
= prev
->prev_bb
;
2045 /* create_basic_block() will append every new block to
2046 basic_block_info automatically. */
2047 copy_basic_block
= create_basic_block (NULL
, (basic_block
) prev
->aux
);
2048 copy_basic_block
->count
= bb
->count
.apply_scale (num
, den
);
2050 copy_gsi
= gsi_start_bb (copy_basic_block
);
2052 for (gsi
= gsi_start_bb (bb
); !gsi_end_p (gsi
); gsi_next (&gsi
))
2055 gimple
*stmt
= gsi_stmt (gsi
);
2056 gimple
*orig_stmt
= stmt
;
2057 gimple_stmt_iterator stmts_gsi
;
2058 bool stmt_added
= false;
2060 id
->regimplify
= false;
2061 stmts
= remap_gimple_stmt (stmt
, id
);
2063 if (gimple_seq_empty_p (stmts
))
2068 for (stmts_gsi
= gsi_start (stmts
);
2069 !gsi_end_p (stmts_gsi
); )
2071 stmt
= gsi_stmt (stmts_gsi
);
2073 /* Advance iterator now before stmt is moved to seq_gsi. */
2074 gsi_next (&stmts_gsi
);
2076 if (gimple_nop_p (stmt
))
2079 gimple_duplicate_stmt_histograms (cfun
, stmt
, id
->src_cfun
,
2082 gsi_insert_after (&seq_gsi
, stmt
, GSI_NEW_STMT
);
2085 gimple_regimplify_operands (stmt
, &seq_gsi
);
2093 /* If copy_basic_block has been empty at the start of this iteration,
2094 call gsi_start_bb again to get at the newly added statements. */
2095 if (gsi_end_p (copy_gsi
))
2096 copy_gsi
= gsi_start_bb (copy_basic_block
);
2098 gsi_next (©_gsi
);
2100 /* Process the new statement. The call to gimple_regimplify_operands
2101 possibly turned the statement into multiple statements, we
2102 need to process all of them. */
2108 stmt
= gsi_stmt (copy_gsi
);
2109 call_stmt
= dyn_cast
<gcall
*> (stmt
);
2111 && gimple_call_va_arg_pack_p (call_stmt
)
2113 && ! gimple_call_va_arg_pack_p (id
->call_stmt
))
2115 /* __builtin_va_arg_pack () should be replaced by
2116 all arguments corresponding to ... in the caller. */
2120 size_t nargs_caller
= gimple_call_num_args (id
->call_stmt
);
2121 size_t nargs
= nargs_caller
;
2123 for (p
= DECL_ARGUMENTS (id
->src_fn
); p
; p
= DECL_CHAIN (p
))
2125 /* Avoid crashing on invalid IL that doesn't have a
2126 varargs function or that passes not enough arguments. */
2132 /* Create the new array of arguments. */
2133 size_t nargs_callee
= gimple_call_num_args (call_stmt
);
2134 size_t n
= nargs
+ nargs_callee
;
2135 argarray
.create (n
);
2136 argarray
.safe_grow_cleared (n
, true);
2138 /* Copy all the arguments before '...' */
2140 memcpy (argarray
.address (),
2141 gimple_call_arg_ptr (call_stmt
, 0),
2142 nargs_callee
* sizeof (tree
));
2144 /* Append the arguments passed in '...' */
2146 memcpy (argarray
.address () + nargs_callee
,
2147 gimple_call_arg_ptr (id
->call_stmt
, 0)
2148 + (nargs_caller
- nargs
), nargs
* sizeof (tree
));
2150 new_call
= gimple_build_call_vec (gimple_call_fn (call_stmt
),
2153 argarray
.release ();
2155 /* Copy all GIMPLE_CALL flags, location and block, except
2156 GF_CALL_VA_ARG_PACK. */
2157 gimple_call_copy_flags (new_call
, call_stmt
);
2158 gimple_call_set_va_arg_pack (new_call
, false);
2159 gimple_call_set_fntype (new_call
, gimple_call_fntype (call_stmt
));
2160 /* location includes block. */
2161 gimple_set_location (new_call
, gimple_location (stmt
));
2162 gimple_call_set_lhs (new_call
, gimple_call_lhs (call_stmt
));
2164 gsi_replace (©_gsi
, new_call
, false);
2169 && (decl
= gimple_call_fndecl (stmt
))
2170 && fndecl_built_in_p (decl
, BUILT_IN_VA_ARG_PACK_LEN
))
2172 /* __builtin_va_arg_pack_len () should be replaced by
2173 the number of anonymous arguments. */
2174 size_t nargs
= gimple_call_num_args (id
->call_stmt
);
2178 for (p
= DECL_ARGUMENTS (id
->src_fn
); p
; p
= DECL_CHAIN (p
))
2181 if (!gimple_call_lhs (stmt
))
2183 /* Drop unused calls. */
2184 gsi_remove (©_gsi
, false);
2187 else if (!gimple_call_va_arg_pack_p (id
->call_stmt
))
2189 count
= build_int_cst (integer_type_node
, nargs
);
2190 new_stmt
= gimple_build_assign (gimple_call_lhs (stmt
), count
);
2191 gsi_replace (©_gsi
, new_stmt
, false);
2194 else if (nargs
!= 0)
2196 tree newlhs
= create_tmp_reg_or_ssa_name (integer_type_node
);
2197 count
= build_int_cst (integer_type_node
, nargs
);
2198 new_stmt
= gimple_build_assign (gimple_call_lhs (stmt
),
2199 PLUS_EXPR
, newlhs
, count
);
2200 gimple_call_set_lhs (stmt
, newlhs
);
2201 gsi_insert_after (©_gsi
, new_stmt
, GSI_NEW_STMT
);
2206 && gimple_call_internal_p (stmt
)
2207 && gimple_call_internal_fn (stmt
) == IFN_TSAN_FUNC_EXIT
)
2209 /* Drop TSAN_FUNC_EXIT () internal calls during inlining. */
2210 gsi_remove (©_gsi
, false);
2214 /* Statements produced by inlining can be unfolded, especially
2215 when we constant propagated some operands. We can't fold
2216 them right now for two reasons:
2217 1) folding require SSA_NAME_DEF_STMTs to be correct
2218 2) we can't change function calls to builtins.
2219 So we just mark statement for later folding. We mark
2220 all new statements, instead just statements that has changed
2221 by some nontrivial substitution so even statements made
2222 foldable indirectly are updated. If this turns out to be
2223 expensive, copy_body can be told to watch for nontrivial
2225 if (id
->statements_to_fold
)
2226 id
->statements_to_fold
->add (stmt
);
2228 /* We're duplicating a CALL_EXPR. Find any corresponding
2229 callgraph edges and update or duplicate them. */
2230 if (gcall
*call_stmt
= dyn_cast
<gcall
*> (stmt
))
2232 struct cgraph_edge
*edge
;
2234 switch (id
->transform_call_graph_edges
)
2236 case CB_CGE_DUPLICATE
:
2237 edge
= id
->src_node
->get_edge (orig_stmt
);
2240 struct cgraph_edge
*old_edge
= edge
;
2242 /* A speculative call is consist of multiple
2243 edges - indirect edge and one or more direct edges
2244 Duplicate the whole thing and distribute frequencies
2246 if (edge
->speculative
)
2249 profile_count direct_cnt
2250 = profile_count::zero ();
2252 /* First figure out the distribution of counts
2253 so we can re-scale BB profile accordingly. */
2254 for (cgraph_edge
*e
= old_edge
; e
;
2255 e
= e
->next_speculative_call_target ())
2256 direct_cnt
= direct_cnt
+ e
->count
;
2258 cgraph_edge
*indirect
2259 = old_edge
->speculative_call_indirect_edge ();
2260 profile_count indir_cnt
= indirect
->count
;
2262 /* Next iterate all direct edges, clone it and its
2263 corresponding reference and update profile. */
2264 for (cgraph_edge
*e
= old_edge
;
2266 e
= e
->next_speculative_call_target ())
2268 profile_count cnt
= e
->count
;
2270 id
->dst_node
->clone_reference
2271 (e
->speculative_call_target_ref (), stmt
);
2272 edge
= e
->clone (id
->dst_node
, call_stmt
,
2273 gimple_uid (stmt
), num
, den
,
2275 profile_probability prob
2276 = cnt
.probability_in (direct_cnt
2279 = copy_basic_block
->count
.apply_probability
2284 (indirect
->num_speculative_call_targets_p ()
2287 /* Duplicate the indirect edge after all direct edges
2289 indirect
= indirect
->clone (id
->dst_node
, call_stmt
,
2294 profile_probability prob
2295 = indir_cnt
.probability_in (direct_cnt
2298 = copy_basic_block
->count
.apply_probability (prob
);
2302 edge
= edge
->clone (id
->dst_node
, call_stmt
,
2306 edge
->count
= copy_basic_block
->count
;
2311 case CB_CGE_MOVE_CLONES
:
2312 id
->dst_node
->set_call_stmt_including_clones (orig_stmt
,
2314 edge
= id
->dst_node
->get_edge (stmt
);
2318 edge
= id
->dst_node
->get_edge (orig_stmt
);
2320 edge
= cgraph_edge::set_call_stmt (edge
, call_stmt
);
2327 /* Constant propagation on argument done during inlining
2328 may create new direct call. Produce an edge for it. */
2330 || (edge
->indirect_inlining_edge
2331 && id
->transform_call_graph_edges
== CB_CGE_MOVE_CLONES
))
2332 && id
->dst_node
->definition
2333 && (fn
= gimple_call_fndecl (stmt
)) != NULL
)
2335 struct cgraph_node
*dest
= cgraph_node::get_create (fn
);
2337 /* We have missing edge in the callgraph. This can happen
2338 when previous inlining turned an indirect call into a
2339 direct call by constant propagating arguments or we are
2340 producing dead clone (for further cloning). In all
2341 other cases we hit a bug (incorrect node sharing is the
2342 most common reason for missing edges). */
2343 gcc_assert (!dest
->definition
2344 || dest
->address_taken
2345 || !id
->src_node
->definition
2346 || !id
->dst_node
->definition
);
2347 if (id
->transform_call_graph_edges
== CB_CGE_MOVE_CLONES
)
2348 id
->dst_node
->create_edge_including_clones
2349 (dest
, orig_stmt
, call_stmt
, bb
->count
,
2350 CIF_ORIGINALLY_INDIRECT_CALL
);
2352 id
->dst_node
->create_edge (dest
, call_stmt
,
2353 bb
->count
)->inline_failed
2354 = CIF_ORIGINALLY_INDIRECT_CALL
;
2357 fprintf (dump_file
, "Created new direct edge to %s\n",
2358 dest
->dump_name ());
2362 notice_special_calls (as_a
<gcall
*> (stmt
));
2365 maybe_duplicate_eh_stmt_fn (cfun
, stmt
, id
->src_cfun
, orig_stmt
,
2366 id
->eh_map
, id
->eh_lp_nr
);
2368 gsi_next (©_gsi
);
2370 while (!gsi_end_p (copy_gsi
));
2372 copy_gsi
= gsi_last_bb (copy_basic_block
);
2375 return copy_basic_block
;
2378 /* Inserting Single Entry Multiple Exit region in SSA form into code in SSA
2379 form is quite easy, since dominator relationship for old basic blocks does
2382 There is however exception where inlining might change dominator relation
2383 across EH edges from basic block within inlined functions destinating
2384 to landing pads in function we inline into.
2386 The function fills in PHI_RESULTs of such PHI nodes if they refer
2387 to gimple regs. Otherwise, the function mark PHI_RESULT of such
2388 PHI nodes for renaming. For non-gimple regs, renaming is safe: the
2389 EH edges are abnormal and SSA_NAME_OCCURS_IN_ABNORMAL_PHI must be
2390 set, and this means that there will be no overlapping live ranges
2391 for the underlying symbol.
2393 This might change in future if we allow redirecting of EH edges and
2394 we might want to change way build CFG pre-inlining to include
2395 all the possible edges then. */
2397 update_ssa_across_abnormal_edges (basic_block bb
, basic_block ret_bb
,
2398 bool can_throw
, bool nonlocal_goto
)
2403 FOR_EACH_EDGE (e
, ei
, bb
->succs
)
2405 || ((basic_block
)e
->dest
->aux
)->index
== ENTRY_BLOCK
)
2411 gcc_assert (e
->flags
& EDGE_EH
);
2414 gcc_assert (!(e
->flags
& EDGE_EH
));
2416 for (si
= gsi_start_phis (e
->dest
); !gsi_end_p (si
); gsi_next (&si
))
2422 /* For abnormal goto/call edges the receiver can be the
2423 ENTRY_BLOCK. Do not assert this cannot happen. */
2425 gcc_assert ((e
->flags
& EDGE_EH
)
2426 || SSA_NAME_OCCURS_IN_ABNORMAL_PHI (PHI_RESULT (phi
)));
2428 re
= find_edge (ret_bb
, e
->dest
);
2429 gcc_checking_assert (re
);
2430 gcc_assert ((re
->flags
& (EDGE_EH
| EDGE_ABNORMAL
))
2431 == (e
->flags
& (EDGE_EH
| EDGE_ABNORMAL
)));
2433 SET_USE (PHI_ARG_DEF_PTR_FROM_EDGE (phi
, e
),
2434 USE_FROM_PTR (PHI_ARG_DEF_PTR_FROM_EDGE (phi
, re
)));
2439 /* Insert clobbers for automatic variables of inlined ID->src_fn
2440 function at the start of basic block ID->eh_landing_pad_dest. */
2443 add_clobbers_to_eh_landing_pad (copy_body_data
*id
)
2446 basic_block bb
= id
->eh_landing_pad_dest
;
2447 live_vars_map
*vars
= NULL
;
2448 unsigned int cnt
= 0;
2450 FOR_EACH_VEC_SAFE_ELT (id
->src_cfun
->local_decls
, i
, var
)
2452 && !DECL_HARD_REGISTER (var
)
2453 && !TREE_THIS_VOLATILE (var
)
2454 && !DECL_HAS_VALUE_EXPR_P (var
)
2455 && !is_gimple_reg (var
)
2456 && auto_var_in_fn_p (var
, id
->src_fn
)
2457 && !lookup_attribute ("omp simd array", DECL_ATTRIBUTES (var
)))
2459 tree
*t
= id
->decl_map
->get (var
);
2464 && !DECL_HARD_REGISTER (new_var
)
2465 && !TREE_THIS_VOLATILE (new_var
)
2466 && !DECL_HAS_VALUE_EXPR_P (new_var
)
2467 && !is_gimple_reg (new_var
)
2468 && auto_var_in_fn_p (new_var
, id
->dst_fn
))
2471 vars
= new live_vars_map
;
2472 vars
->put (DECL_UID (var
), cnt
++);
2478 vec
<bitmap_head
> live
= compute_live_vars (id
->src_cfun
, vars
);
2479 FOR_EACH_VEC_SAFE_ELT (id
->src_cfun
->local_decls
, i
, var
)
2484 bool needed
= false;
2485 unsigned int *v
= vars
->get (DECL_UID (var
));
2488 FOR_EACH_EDGE (e
, ei
, bb
->preds
)
2489 if ((e
->flags
& EDGE_EH
) != 0
2490 && e
->src
->index
>= id
->add_clobbers_to_eh_landing_pads
)
2492 basic_block src_bb
= (basic_block
) e
->src
->aux
;
2494 if (bitmap_bit_p (&live
[src_bb
->index
], *v
))
2502 tree new_var
= *id
->decl_map
->get (var
);
2503 gimple_stmt_iterator gsi
= gsi_after_labels (bb
);
2504 tree clobber
= build_clobber (TREE_TYPE (new_var
));
2505 gimple
*clobber_stmt
= gimple_build_assign (new_var
, clobber
);
2506 gsi_insert_before (&gsi
, clobber_stmt
, GSI_NEW_STMT
);
2509 destroy_live_vars (live
);
2513 /* Copy edges from BB into its copy constructed earlier, scale profile
2514 accordingly. Edges will be taken care of later. Assume aux
2515 pointers to point to the copies of each BB. Return true if any
2516 debug stmts are left after a statement that must end the basic block. */
2519 copy_edges_for_bb (basic_block bb
, profile_count num
, profile_count den
,
2520 basic_block ret_bb
, basic_block abnormal_goto_dest
,
2523 basic_block new_bb
= (basic_block
) bb
->aux
;
2526 gimple_stmt_iterator si
;
2527 bool need_debug_cleanup
= false;
2529 /* Use the indices from the original blocks to create edges for the
2531 FOR_EACH_EDGE (old_edge
, ei
, bb
->succs
)
2532 if (!(old_edge
->flags
& EDGE_EH
))
2535 int flags
= old_edge
->flags
;
2536 location_t locus
= old_edge
->goto_locus
;
2538 /* Return edges do get a FALLTHRU flag when they get inlined. */
2539 if (old_edge
->dest
->index
== EXIT_BLOCK
2540 && !(flags
& (EDGE_TRUE_VALUE
|EDGE_FALSE_VALUE
|EDGE_FAKE
))
2541 && old_edge
->dest
->aux
!= EXIT_BLOCK_PTR_FOR_FN (cfun
))
2542 flags
|= EDGE_FALLTHRU
;
2545 = make_edge (new_bb
, (basic_block
) old_edge
->dest
->aux
, flags
);
2546 new_edge
->probability
= old_edge
->probability
;
2547 if (!id
->reset_location
)
2548 new_edge
->goto_locus
= remap_location (locus
, id
);
2551 if (bb
->index
== ENTRY_BLOCK
|| bb
->index
== EXIT_BLOCK
)
2554 /* When doing function splitting, we must decrease count of the return block
2555 which was previously reachable by block we did not copy. */
2556 if (single_succ_p (bb
) && single_succ_edge (bb
)->dest
->index
== EXIT_BLOCK
)
2557 FOR_EACH_EDGE (old_edge
, ei
, bb
->preds
)
2558 if (old_edge
->src
->index
!= ENTRY_BLOCK
2559 && !old_edge
->src
->aux
)
2560 new_bb
->count
-= old_edge
->count ().apply_scale (num
, den
);
2562 /* Walk stmts from end to start so that splitting will adjust the BB
2563 pointer for each stmt at most once, even when we split the block
2565 bool seen_nondebug
= false;
2566 for (si
= gsi_last_bb (new_bb
); !gsi_end_p (si
);)
2568 bool can_throw
, nonlocal_goto
;
2569 gimple
*copy_stmt
= gsi_stmt (si
);
2571 /* Do this before the possible split_block. */
2574 /* If this tree could throw an exception, there are two
2575 cases where we need to add abnormal edge(s): the
2576 tree wasn't in a region and there is a "current
2577 region" in the caller; or the original tree had
2578 EH edges. In both cases split the block after the tree,
2579 and add abnormal edge(s) as needed; we need both
2580 those from the callee and the caller.
2581 We check whether the copy can throw, because the const
2582 propagation can change an INDIRECT_REF which throws
2583 into a COMPONENT_REF which doesn't. If the copy
2584 can throw, the original could also throw. */
2585 can_throw
= stmt_can_throw_internal (cfun
, copy_stmt
);
2587 = (stmt_can_make_abnormal_goto (copy_stmt
)
2588 && !computed_goto_p (copy_stmt
));
2590 if (can_throw
|| nonlocal_goto
)
2592 /* If there's only debug insns after copy_stmt don't split
2593 the block but instead mark the block for cleanup. */
2595 need_debug_cleanup
= true;
2598 /* Note that bb's predecessor edges aren't necessarily
2599 right at this point; split_block doesn't care. */
2600 edge e
= split_block (new_bb
, copy_stmt
);
2601 e
->dest
->aux
= new_bb
->aux
;
2602 seen_nondebug
= false;
2606 if (!is_gimple_debug (copy_stmt
))
2607 seen_nondebug
= true;
2609 bool update_probs
= false;
2611 if (gimple_code (copy_stmt
) == GIMPLE_EH_DISPATCH
)
2613 make_eh_dispatch_edges (as_a
<geh_dispatch
*> (copy_stmt
));
2614 update_probs
= true;
2618 make_eh_edge (copy_stmt
);
2619 update_probs
= true;
2622 /* EH edges may not match old edges. Copy as much as possible. */
2627 basic_block copy_stmt_bb
= gimple_bb (copy_stmt
);
2629 FOR_EACH_EDGE (old_edge
, ei
, bb
->succs
)
2630 if ((old_edge
->flags
& EDGE_EH
)
2631 && (e
= find_edge (copy_stmt_bb
,
2632 (basic_block
) old_edge
->dest
->aux
))
2633 && (e
->flags
& EDGE_EH
))
2634 e
->probability
= old_edge
->probability
;
2636 FOR_EACH_EDGE (e
, ei
, copy_stmt_bb
->succs
)
2637 if (e
->flags
& EDGE_EH
)
2639 if (!e
->probability
.initialized_p ())
2640 e
->probability
= profile_probability::never ();
2641 if (e
->dest
->index
< id
->add_clobbers_to_eh_landing_pads
)
2643 if (id
->eh_landing_pad_dest
== NULL
)
2644 id
->eh_landing_pad_dest
= e
->dest
;
2646 gcc_assert (id
->eh_landing_pad_dest
== e
->dest
);
2652 /* If the call we inline cannot make abnormal goto do not add
2653 additional abnormal edges but only retain those already present
2654 in the original function body. */
2655 if (abnormal_goto_dest
== NULL
)
2656 nonlocal_goto
= false;
2659 basic_block copy_stmt_bb
= gimple_bb (copy_stmt
);
2661 if (get_abnormal_succ_dispatcher (copy_stmt_bb
))
2662 nonlocal_goto
= false;
2663 /* ABNORMAL_DISPATCHER (1) is for longjmp/setjmp or nonlocal gotos
2664 in OpenMP regions which aren't allowed to be left abnormally.
2665 So, no need to add abnormal edge in that case. */
2666 else if (is_gimple_call (copy_stmt
)
2667 && gimple_call_internal_p (copy_stmt
)
2668 && (gimple_call_internal_fn (copy_stmt
)
2669 == IFN_ABNORMAL_DISPATCHER
)
2670 && gimple_call_arg (copy_stmt
, 0) == boolean_true_node
)
2671 nonlocal_goto
= false;
2673 make_single_succ_edge (copy_stmt_bb
, abnormal_goto_dest
,
2677 if ((can_throw
|| nonlocal_goto
)
2678 && gimple_in_ssa_p (cfun
))
2679 update_ssa_across_abnormal_edges (gimple_bb (copy_stmt
), ret_bb
,
2680 can_throw
, nonlocal_goto
);
2682 return need_debug_cleanup
;
2685 /* Copy the PHIs. All blocks and edges are copied, some blocks
2686 was possibly split and new outgoing EH edges inserted.
2687 BB points to the block of original function and AUX pointers links
2688 the original and newly copied blocks. */
2691 copy_phis_for_bb (basic_block bb
, copy_body_data
*id
)
2693 basic_block
const new_bb
= (basic_block
) bb
->aux
;
2698 bool inserted
= false;
2700 for (si
= gsi_start_phis (bb
); !gsi_end_p (si
); gsi_next (&si
))
2706 res
= PHI_RESULT (phi
);
2708 if (!virtual_operand_p (res
)
2709 && (!id
->param_body_adjs
2710 || !id
->param_body_adjs
->m_dead_stmts
.contains (phi
)))
2712 walk_tree (&new_res
, copy_tree_body_r
, id
, NULL
);
2713 if (EDGE_COUNT (new_bb
->preds
) == 0)
2715 /* Technically we'd want a SSA_DEFAULT_DEF here... */
2716 SSA_NAME_DEF_STMT (new_res
) = gimple_build_nop ();
2720 new_phi
= create_phi_node (new_res
, new_bb
);
2721 FOR_EACH_EDGE (new_edge
, ei
, new_bb
->preds
)
2723 edge old_edge
= find_edge ((basic_block
) new_edge
->src
->aux
,
2730 /* When doing partial cloning, we allow PHIs on the entry
2731 block as long as all the arguments are the same.
2732 Find any input edge to see argument to copy. */
2734 FOR_EACH_EDGE (old_edge
, ei2
, bb
->preds
)
2735 if (!old_edge
->src
->aux
)
2738 arg
= PHI_ARG_DEF_FROM_EDGE (phi
, old_edge
);
2740 walk_tree (&new_arg
, copy_tree_body_r
, id
, NULL
);
2741 gcc_assert (new_arg
);
2742 /* With return slot optimization we can end up with
2743 non-gimple (foo *)&this->m, fix that here. */
2744 if (TREE_CODE (new_arg
) != SSA_NAME
2745 && TREE_CODE (new_arg
) != FUNCTION_DECL
2746 && !is_gimple_val (new_arg
))
2748 gimple_seq stmts
= NULL
;
2749 new_arg
= force_gimple_operand (new_arg
, &stmts
, true,
2751 gsi_insert_seq_on_edge (new_edge
, stmts
);
2754 locus
= gimple_phi_arg_location_from_edge (phi
, old_edge
);
2755 if (id
->reset_location
)
2756 locus
= input_location
;
2758 locus
= remap_location (locus
, id
);
2759 add_phi_arg (new_phi
, new_arg
, new_edge
, locus
);
2765 /* Commit the delayed edge insertions. */
2767 FOR_EACH_EDGE (new_edge
, ei
, new_bb
->preds
)
2768 gsi_commit_one_edge_insert (new_edge
, NULL
);
2772 /* Wrapper for remap_decl so it can be used as a callback. */
2775 remap_decl_1 (tree decl
, void *data
)
2777 return remap_decl (decl
, (copy_body_data
*) data
);
2780 /* Build struct function and associated datastructures for the new clone
2781 NEW_FNDECL to be build. CALLEE_FNDECL is the original. Function changes
2782 the cfun to the function of new_fndecl (and current_function_decl too). */
2785 initialize_cfun (tree new_fndecl
, tree callee_fndecl
, profile_count count
)
2787 struct function
*src_cfun
= DECL_STRUCT_FUNCTION (callee_fndecl
);
2789 /* Register specific tree functions. */
2790 gimple_register_cfg_hooks ();
2792 /* Get clean struct function. */
2793 push_struct_function (new_fndecl
, true);
2794 targetm
.target_option
.relayout_function (new_fndecl
);
2796 /* We will rebuild these, so just sanity check that they are empty. */
2797 gcc_assert (VALUE_HISTOGRAMS (cfun
) == NULL
);
2798 gcc_assert (cfun
->local_decls
== NULL
);
2799 gcc_assert (cfun
->cfg
== NULL
);
2800 gcc_assert (cfun
->decl
== new_fndecl
);
2802 /* Copy items we preserve during cloning. */
2803 cfun
->static_chain_decl
= src_cfun
->static_chain_decl
;
2804 cfun
->nonlocal_goto_save_area
= src_cfun
->nonlocal_goto_save_area
;
2805 cfun
->function_end_locus
= src_cfun
->function_end_locus
;
2806 cfun
->curr_properties
= src_cfun
->curr_properties
;
2807 cfun
->last_verified
= src_cfun
->last_verified
;
2808 cfun
->va_list_gpr_size
= src_cfun
->va_list_gpr_size
;
2809 cfun
->va_list_fpr_size
= src_cfun
->va_list_fpr_size
;
2810 cfun
->has_nonlocal_label
= src_cfun
->has_nonlocal_label
;
2811 cfun
->calls_eh_return
= src_cfun
->calls_eh_return
;
2812 cfun
->stdarg
= src_cfun
->stdarg
;
2813 cfun
->after_inlining
= src_cfun
->after_inlining
;
2814 cfun
->can_throw_non_call_exceptions
2815 = src_cfun
->can_throw_non_call_exceptions
;
2816 cfun
->can_delete_dead_exceptions
= src_cfun
->can_delete_dead_exceptions
;
2817 cfun
->returns_struct
= src_cfun
->returns_struct
;
2818 cfun
->returns_pcc_struct
= src_cfun
->returns_pcc_struct
;
2820 init_empty_tree_cfg ();
2822 profile_status_for_fn (cfun
) = profile_status_for_fn (src_cfun
);
2823 cfun
->cfg
->full_profile
= src_cfun
->cfg
->full_profile
;
2825 profile_count num
= count
;
2826 profile_count den
= ENTRY_BLOCK_PTR_FOR_FN (src_cfun
)->count
;
2827 profile_count::adjust_for_ipa_scaling (&num
, &den
);
2829 ENTRY_BLOCK_PTR_FOR_FN (cfun
)->count
=
2830 ENTRY_BLOCK_PTR_FOR_FN (src_cfun
)->count
.apply_scale (count
,
2831 ENTRY_BLOCK_PTR_FOR_FN (src_cfun
)->count
);
2832 EXIT_BLOCK_PTR_FOR_FN (cfun
)->count
=
2833 EXIT_BLOCK_PTR_FOR_FN (src_cfun
)->count
.apply_scale (count
,
2834 ENTRY_BLOCK_PTR_FOR_FN (src_cfun
)->count
);
2836 init_eh_for_function ();
2838 if (src_cfun
->gimple_df
)
2840 init_tree_ssa (cfun
);
2841 cfun
->gimple_df
->in_ssa_p
= src_cfun
->gimple_df
->in_ssa_p
;
2842 if (cfun
->gimple_df
->in_ssa_p
)
2843 init_ssa_operands (cfun
);
2847 /* Helper function for copy_cfg_body. Move debug stmts from the end
2848 of NEW_BB to the beginning of successor basic blocks when needed. If the
2849 successor has multiple predecessors, reset them, otherwise keep
2853 maybe_move_debug_stmts_to_successors (copy_body_data
*id
, basic_block new_bb
)
2857 gimple_stmt_iterator si
= gsi_last_nondebug_bb (new_bb
);
2860 || gsi_one_before_end_p (si
)
2861 || !(stmt_can_throw_internal (cfun
, gsi_stmt (si
))
2862 || stmt_can_make_abnormal_goto (gsi_stmt (si
))))
2865 FOR_EACH_EDGE (e
, ei
, new_bb
->succs
)
2867 gimple_stmt_iterator ssi
= gsi_last_bb (new_bb
);
2868 gimple_stmt_iterator dsi
= gsi_after_labels (e
->dest
);
2869 while (is_gimple_debug (gsi_stmt (ssi
)))
2871 gimple
*stmt
= gsi_stmt (ssi
);
2876 /* For the last edge move the debug stmts instead of copying
2878 if (ei_one_before_end_p (ei
))
2882 if (!single_pred_p (e
->dest
) && gimple_debug_bind_p (stmt
))
2884 gimple_debug_bind_reset_value (stmt
);
2885 gimple_set_location (stmt
, UNKNOWN_LOCATION
);
2887 gsi_remove (&si
, false);
2888 gsi_insert_before (&dsi
, stmt
, GSI_NEW_STMT
);
2892 if (gimple_debug_bind_p (stmt
))
2894 var
= gimple_debug_bind_get_var (stmt
);
2895 if (single_pred_p (e
->dest
))
2897 value
= gimple_debug_bind_get_value (stmt
);
2898 value
= unshare_expr (value
);
2899 new_stmt
= gimple_build_debug_bind (var
, value
, stmt
);
2902 new_stmt
= gimple_build_debug_bind (var
, NULL_TREE
, NULL
);
2904 else if (gimple_debug_source_bind_p (stmt
))
2906 var
= gimple_debug_source_bind_get_var (stmt
);
2907 value
= gimple_debug_source_bind_get_value (stmt
);
2908 new_stmt
= gimple_build_debug_source_bind (var
, value
, stmt
);
2910 else if (gimple_debug_nonbind_marker_p (stmt
))
2911 new_stmt
= as_a
<gdebug
*> (gimple_copy (stmt
));
2914 gsi_insert_before (&dsi
, new_stmt
, GSI_NEW_STMT
);
2915 id
->debug_stmts
.safe_push (new_stmt
);
2921 /* Make a copy of the sub-loops of SRC_PARENT and place them
2922 as siblings of DEST_PARENT. */
2925 copy_loops (copy_body_data
*id
,
2926 class loop
*dest_parent
, class loop
*src_parent
)
2928 class loop
*src_loop
= src_parent
->inner
;
2931 if (!id
->blocks_to_copy
2932 || bitmap_bit_p (id
->blocks_to_copy
, src_loop
->header
->index
))
2934 class loop
*dest_loop
= alloc_loop ();
2936 /* Assign the new loop its header and latch and associate
2937 those with the new loop. */
2938 dest_loop
->header
= (basic_block
)src_loop
->header
->aux
;
2939 dest_loop
->header
->loop_father
= dest_loop
;
2940 if (src_loop
->latch
!= NULL
)
2942 dest_loop
->latch
= (basic_block
)src_loop
->latch
->aux
;
2943 dest_loop
->latch
->loop_father
= dest_loop
;
2946 /* Copy loop meta-data. */
2947 copy_loop_info (src_loop
, dest_loop
);
2948 if (dest_loop
->unroll
)
2949 cfun
->has_unroll
= true;
2950 if (dest_loop
->force_vectorize
)
2951 cfun
->has_force_vectorize_loops
= true;
2952 if (id
->src_cfun
->last_clique
!= 0)
2953 dest_loop
->owned_clique
2954 = remap_dependence_clique (id
,
2955 src_loop
->owned_clique
2956 ? src_loop
->owned_clique
: 1);
2958 /* Finally place it into the loop array and the loop tree. */
2959 place_new_loop (cfun
, dest_loop
);
2960 flow_loop_tree_node_add (dest_parent
, dest_loop
);
2962 if (src_loop
->simduid
)
2964 dest_loop
->simduid
= remap_decl (src_loop
->simduid
, id
);
2965 cfun
->has_simduid_loops
= true;
2969 copy_loops (id
, dest_loop
, src_loop
);
2971 src_loop
= src_loop
->next
;
2975 /* Call redirect_call_stmt_to_callee on all calls in BB. */
2978 redirect_all_calls (copy_body_data
* id
, basic_block bb
)
2980 gimple_stmt_iterator si
;
2981 gimple
*last
= last_nondebug_stmt (bb
);
2982 for (si
= gsi_start_bb (bb
); !gsi_end_p (si
); gsi_next (&si
))
2984 gimple
*stmt
= gsi_stmt (si
);
2985 if (is_gimple_call (stmt
))
2987 tree old_lhs
= gimple_call_lhs (stmt
);
2988 struct cgraph_edge
*edge
= id
->dst_node
->get_edge (stmt
);
2991 if (!id
->killed_new_ssa_names
)
2992 id
->killed_new_ssa_names
= new hash_set
<tree
> (16);
2994 = cgraph_edge::redirect_call_stmt_to_callee (edge
,
2995 id
->killed_new_ssa_names
);
2997 && TREE_CODE (old_lhs
) == SSA_NAME
2998 && !gimple_call_lhs (new_stmt
))
2999 /* In case of IPA-SRA removing the LHS, the name should have
3000 been already added to the hash. But in case of redirecting
3001 to builtin_unreachable it was not and the name still should
3002 be pruned from debug statements. */
3003 id
->killed_new_ssa_names
->add (old_lhs
);
3005 if (stmt
== last
&& id
->call_stmt
&& maybe_clean_eh_stmt (stmt
))
3006 gimple_purge_dead_eh_edges (bb
);
3012 /* Make a copy of the body of FN so that it can be inserted inline in
3013 another function. Walks FN via CFG, returns new fndecl. */
3016 copy_cfg_body (copy_body_data
* id
,
3017 basic_block entry_block_map
, basic_block exit_block_map
,
3018 basic_block new_entry
)
3020 tree callee_fndecl
= id
->src_fn
;
3021 /* Original cfun for the callee, doesn't change. */
3022 struct function
*src_cfun
= DECL_STRUCT_FUNCTION (callee_fndecl
);
3023 struct function
*cfun_to_copy
;
3025 tree new_fndecl
= NULL
;
3026 bool need_debug_cleanup
= false;
3028 profile_count den
= ENTRY_BLOCK_PTR_FOR_FN (src_cfun
)->count
;
3029 profile_count num
= entry_block_map
->count
;
3031 cfun_to_copy
= id
->src_cfun
= DECL_STRUCT_FUNCTION (callee_fndecl
);
3033 /* Register specific tree functions. */
3034 gimple_register_cfg_hooks ();
3036 /* If we are inlining just region of the function, make sure to connect
3037 new entry to ENTRY_BLOCK_PTR_FOR_FN (cfun). Since new entry can be
3038 part of loop, we must compute frequency and probability of
3039 ENTRY_BLOCK_PTR_FOR_FN (cfun) based on the frequencies and
3040 probabilities of edges incoming from nonduplicated region. */
3045 den
= profile_count::zero ();
3047 FOR_EACH_EDGE (e
, ei
, new_entry
->preds
)
3050 ENTRY_BLOCK_PTR_FOR_FN (cfun
)->count
= den
;
3053 profile_count::adjust_for_ipa_scaling (&num
, &den
);
3055 /* Must have a CFG here at this point. */
3056 gcc_assert (ENTRY_BLOCK_PTR_FOR_FN
3057 (DECL_STRUCT_FUNCTION (callee_fndecl
)));
3060 ENTRY_BLOCK_PTR_FOR_FN (cfun_to_copy
)->aux
= entry_block_map
;
3061 EXIT_BLOCK_PTR_FOR_FN (cfun_to_copy
)->aux
= exit_block_map
;
3062 entry_block_map
->aux
= ENTRY_BLOCK_PTR_FOR_FN (cfun_to_copy
);
3063 exit_block_map
->aux
= EXIT_BLOCK_PTR_FOR_FN (cfun_to_copy
);
3065 /* Duplicate any exception-handling regions. */
3067 id
->eh_map
= duplicate_eh_regions (cfun_to_copy
, NULL
, id
->eh_lp_nr
,
3070 /* Use aux pointers to map the original blocks to copy. */
3071 FOR_EACH_BB_FN (bb
, cfun_to_copy
)
3072 if (!id
->blocks_to_copy
|| bitmap_bit_p (id
->blocks_to_copy
, bb
->index
))
3074 basic_block new_bb
= copy_bb (id
, bb
, num
, den
);
3077 new_bb
->loop_father
= entry_block_map
->loop_father
;
3080 last
= last_basic_block_for_fn (cfun
);
3082 /* Now that we've duplicated the blocks, duplicate their edges. */
3083 basic_block abnormal_goto_dest
= NULL
;
3085 && stmt_can_make_abnormal_goto (id
->call_stmt
))
3087 gimple_stmt_iterator gsi
= gsi_for_stmt (id
->call_stmt
);
3089 bb
= gimple_bb (id
->call_stmt
);
3091 if (gsi_end_p (gsi
))
3092 abnormal_goto_dest
= get_abnormal_succ_dispatcher (bb
);
3094 FOR_ALL_BB_FN (bb
, cfun_to_copy
)
3095 if (!id
->blocks_to_copy
3096 || (bb
->index
> 0 && bitmap_bit_p (id
->blocks_to_copy
, bb
->index
)))
3097 need_debug_cleanup
|= copy_edges_for_bb (bb
, num
, den
, exit_block_map
,
3098 abnormal_goto_dest
, id
);
3100 if (id
->eh_landing_pad_dest
)
3102 add_clobbers_to_eh_landing_pad (id
);
3103 id
->eh_landing_pad_dest
= NULL
;
3108 edge e
= make_edge (entry_block_map
, (basic_block
)new_entry
->aux
,
3110 e
->probability
= profile_probability::always ();
3113 /* Duplicate the loop tree, if available and wanted. */
3114 if (loops_for_fn (src_cfun
) != NULL
3115 && current_loops
!= NULL
)
3117 copy_loops (id
, entry_block_map
->loop_father
,
3118 get_loop (src_cfun
, 0));
3119 /* Defer to cfgcleanup to update loop-father fields of basic-blocks. */
3120 loops_state_set (LOOPS_NEED_FIXUP
);
3123 /* If the loop tree in the source function needed fixup, mark the
3124 destination loop tree for fixup, too. */
3125 if (loops_for_fn (src_cfun
)->state
& LOOPS_NEED_FIXUP
)
3126 loops_state_set (LOOPS_NEED_FIXUP
);
3128 if (gimple_in_ssa_p (cfun
))
3129 FOR_ALL_BB_FN (bb
, cfun_to_copy
)
3130 if (!id
->blocks_to_copy
3131 || (bb
->index
> 0 && bitmap_bit_p (id
->blocks_to_copy
, bb
->index
)))
3132 copy_phis_for_bb (bb
, id
);
3134 FOR_ALL_BB_FN (bb
, cfun_to_copy
)
3137 if (need_debug_cleanup
3138 && bb
->index
!= ENTRY_BLOCK
3139 && bb
->index
!= EXIT_BLOCK
)
3140 maybe_move_debug_stmts_to_successors (id
, (basic_block
) bb
->aux
);
3141 /* Update call edge destinations. This cannot be done before loop
3142 info is updated, because we may split basic blocks. */
3143 if (id
->transform_call_graph_edges
== CB_CGE_DUPLICATE
3144 && bb
->index
!= ENTRY_BLOCK
3145 && bb
->index
!= EXIT_BLOCK
)
3146 redirect_all_calls (id
, (basic_block
)bb
->aux
);
3147 ((basic_block
)bb
->aux
)->aux
= NULL
;
3151 /* Zero out AUX fields of newly created block during EH edge
3153 for (; last
< last_basic_block_for_fn (cfun
); last
++)
3155 if (need_debug_cleanup
)
3156 maybe_move_debug_stmts_to_successors (id
,
3157 BASIC_BLOCK_FOR_FN (cfun
, last
));
3158 BASIC_BLOCK_FOR_FN (cfun
, last
)->aux
= NULL
;
3159 /* Update call edge destinations. This cannot be done before loop
3160 info is updated, because we may split basic blocks. */
3161 if (id
->transform_call_graph_edges
== CB_CGE_DUPLICATE
)
3162 redirect_all_calls (id
, BASIC_BLOCK_FOR_FN (cfun
, last
));
3164 entry_block_map
->aux
= NULL
;
3165 exit_block_map
->aux
= NULL
;
3172 if (id
->dependence_map
)
3174 delete id
->dependence_map
;
3175 id
->dependence_map
= NULL
;
3181 /* Copy the debug STMT using ID. We deal with these statements in a
3182 special way: if any variable in their VALUE expression wasn't
3183 remapped yet, we won't remap it, because that would get decl uids
3184 out of sync, causing codegen differences between -g and -g0. If
3185 this arises, we drop the VALUE expression altogether. */
3188 copy_debug_stmt (gdebug
*stmt
, copy_body_data
*id
)
3191 struct walk_stmt_info wi
;
3193 if (tree block
= gimple_block (stmt
))
3195 n
= id
->decl_map
->get (block
);
3196 gimple_set_block (stmt
, n
? *n
: id
->block
);
3199 if (gimple_debug_nonbind_marker_p (stmt
))
3201 if (id
->call_stmt
&& !gimple_block (stmt
))
3203 gimple_stmt_iterator gsi
= gsi_for_stmt (stmt
);
3204 gsi_remove (&gsi
, true);
3209 /* Remap all the operands in COPY. */
3210 memset (&wi
, 0, sizeof (wi
));
3213 processing_debug_stmt
= 1;
3215 if (gimple_debug_source_bind_p (stmt
))
3216 t
= gimple_debug_source_bind_get_var (stmt
);
3217 else if (gimple_debug_bind_p (stmt
))
3218 t
= gimple_debug_bind_get_var (stmt
);
3222 if (TREE_CODE (t
) == PARM_DECL
3224 && (n
= id
->debug_map
->get (t
)))
3226 gcc_assert (VAR_P (*n
));
3229 else if (VAR_P (t
) && !is_global_var (t
) && !id
->decl_map
->get (t
))
3230 /* T is a non-localized variable. */;
3232 walk_tree (&t
, remap_gimple_op_r
, &wi
, NULL
);
3234 if (gimple_debug_bind_p (stmt
))
3236 gimple_debug_bind_set_var (stmt
, t
);
3238 if (gimple_debug_bind_has_value_p (stmt
))
3239 walk_tree (gimple_debug_bind_get_value_ptr (stmt
),
3240 remap_gimple_op_r
, &wi
, NULL
);
3242 /* Punt if any decl couldn't be remapped. */
3243 if (processing_debug_stmt
< 0)
3244 gimple_debug_bind_reset_value (stmt
);
3246 else if (gimple_debug_source_bind_p (stmt
))
3248 gimple_debug_source_bind_set_var (stmt
, t
);
3249 /* When inlining and source bind refers to one of the optimized
3250 away parameters, change the source bind into normal debug bind
3251 referring to the corresponding DEBUG_EXPR_DECL that should have
3252 been bound before the call stmt. */
3253 t
= gimple_debug_source_bind_get_value (stmt
);
3255 && TREE_CODE (t
) == PARM_DECL
3258 vec
<tree
, va_gc
> **debug_args
= decl_debug_args_lookup (id
->src_fn
);
3260 if (debug_args
!= NULL
)
3262 for (i
= 0; i
< vec_safe_length (*debug_args
); i
+= 2)
3263 if ((**debug_args
)[i
] == DECL_ORIGIN (t
)
3264 && TREE_CODE ((**debug_args
)[i
+ 1]) == DEBUG_EXPR_DECL
)
3266 t
= (**debug_args
)[i
+ 1];
3267 stmt
->subcode
= GIMPLE_DEBUG_BIND
;
3268 gimple_debug_bind_set_value (stmt
, t
);
3273 if (gimple_debug_source_bind_p (stmt
))
3274 walk_tree (gimple_debug_source_bind_get_value_ptr (stmt
),
3275 remap_gimple_op_r
, &wi
, NULL
);
3278 processing_debug_stmt
= 0;
3283 /* Process deferred debug stmts. In order to give values better odds
3284 of being successfully remapped, we delay the processing of debug
3285 stmts until all other stmts that might require remapping are
3289 copy_debug_stmts (copy_body_data
*id
)
3291 if (!id
->debug_stmts
.exists ())
3294 for (gdebug
*stmt
: id
->debug_stmts
)
3295 copy_debug_stmt (stmt
, id
);
3297 id
->debug_stmts
.release ();
3300 /* Make a copy of the body of SRC_FN so that it can be inserted inline in
3301 another function. */
3304 copy_tree_body (copy_body_data
*id
)
3306 tree fndecl
= id
->src_fn
;
3307 tree body
= DECL_SAVED_TREE (fndecl
);
3309 walk_tree (&body
, copy_tree_body_r
, id
, NULL
);
3314 /* Make a copy of the body of FN so that it can be inserted inline in
3315 another function. */
3318 copy_body (copy_body_data
*id
,
3319 basic_block entry_block_map
, basic_block exit_block_map
,
3320 basic_block new_entry
)
3322 tree fndecl
= id
->src_fn
;
3325 /* If this body has a CFG, walk CFG and copy. */
3326 gcc_assert (ENTRY_BLOCK_PTR_FOR_FN (DECL_STRUCT_FUNCTION (fndecl
)));
3327 body
= copy_cfg_body (id
, entry_block_map
, exit_block_map
,
3329 copy_debug_stmts (id
);
3330 if (id
->killed_new_ssa_names
)
3332 ipa_release_ssas_in_hash (id
->killed_new_ssa_names
);
3333 delete id
->killed_new_ssa_names
;
3334 id
->killed_new_ssa_names
= NULL
;
3340 /* Return true if VALUE is an ADDR_EXPR of an automatic variable
3341 defined in function FN, or of a data member thereof. */
3344 self_inlining_addr_expr (tree value
, tree fn
)
3348 if (TREE_CODE (value
) != ADDR_EXPR
)
3351 var
= get_base_address (TREE_OPERAND (value
, 0));
3353 return var
&& auto_var_in_fn_p (var
, fn
);
3356 /* Append to BB a debug annotation that binds VAR to VALUE, inheriting
3357 lexical block and line number information from base_stmt, if given,
3358 or from the last stmt of the block otherwise. */
3361 insert_init_debug_bind (copy_body_data
*id
,
3362 basic_block bb
, tree var
, tree value
,
3366 gimple_stmt_iterator gsi
;
3369 if (!gimple_in_ssa_p (id
->src_cfun
))
3372 if (!opt_for_fn (id
->dst_fn
, flag_var_tracking_assignments
))
3375 tracked_var
= target_for_debug_bind (var
);
3381 gsi
= gsi_last_bb (bb
);
3382 if (!base_stmt
&& !gsi_end_p (gsi
))
3383 base_stmt
= gsi_stmt (gsi
);
3386 note
= gimple_build_debug_bind (tracked_var
,
3387 value
== error_mark_node
3388 ? NULL_TREE
: unshare_expr (value
),
3393 if (!gsi_end_p (gsi
))
3394 gsi_insert_after (&gsi
, note
, GSI_SAME_STMT
);
3396 gsi_insert_before (&gsi
, note
, GSI_SAME_STMT
);
3403 insert_init_stmt (copy_body_data
*id
, basic_block bb
, gimple
*init_stmt
)
3405 /* If VAR represents a zero-sized variable, it's possible that the
3406 assignment statement may result in no gimple statements. */
3409 gimple_stmt_iterator si
= gsi_last_bb (bb
);
3411 /* We can end up with init statements that store to a non-register
3412 from a rhs with a conversion. Handle that here by forcing the
3413 rhs into a temporary. gimple_regimplify_operands is not
3414 prepared to do this for us. */
3415 if (!is_gimple_debug (init_stmt
)
3416 && !is_gimple_reg (gimple_assign_lhs (init_stmt
))
3417 && is_gimple_reg_type (TREE_TYPE (gimple_assign_lhs (init_stmt
)))
3418 && gimple_assign_rhs_class (init_stmt
) == GIMPLE_UNARY_RHS
)
3420 tree rhs
= build1 (gimple_assign_rhs_code (init_stmt
),
3421 TREE_TYPE (gimple_assign_lhs (init_stmt
)),
3422 gimple_assign_rhs1 (init_stmt
));
3423 rhs
= force_gimple_operand_gsi (&si
, rhs
, true, NULL_TREE
, false,
3425 gimple_assign_set_rhs_code (init_stmt
, TREE_CODE (rhs
));
3426 gimple_assign_set_rhs1 (init_stmt
, rhs
);
3428 gsi_insert_after (&si
, init_stmt
, GSI_NEW_STMT
);
3429 if (!is_gimple_debug (init_stmt
))
3431 gimple_regimplify_operands (init_stmt
, &si
);
3433 tree def
= gimple_assign_lhs (init_stmt
);
3434 insert_init_debug_bind (id
, bb
, def
, def
, init_stmt
);
3439 /* Deal with mismatched formal/actual parameters, in a rather brute-force way
3440 if need be (which should only be necessary for invalid programs). Attempt
3441 to convert VAL to TYPE and return the result if it is possible, just return
3442 a zero constant of the given type if it fails. */
3445 force_value_to_type (tree type
, tree value
)
3447 /* If we can match up types by promotion/demotion do so. */
3448 if (fold_convertible_p (type
, value
))
3449 return fold_convert (type
, value
);
3451 /* ??? For valid programs we should not end up here.
3452 Still if we end up with truly mismatched types here, fall back
3453 to using a VIEW_CONVERT_EXPR or a literal zero to not leak invalid
3454 GIMPLE to the following passes. */
3455 if (TREE_CODE (value
) == WITH_SIZE_EXPR
)
3456 return error_mark_node
;
3457 else if (!is_gimple_reg_type (TREE_TYPE (value
))
3458 || TYPE_SIZE (type
) == TYPE_SIZE (TREE_TYPE (value
)))
3459 return fold_build1 (VIEW_CONVERT_EXPR
, type
, value
);
3461 return build_zero_cst (type
);
3464 /* Initialize parameter P with VALUE. If needed, produce init statement
3465 at the end of BB. When BB is NULL, we return init statement to be
3468 setup_one_parameter (copy_body_data
*id
, tree p
, tree value
, tree fn
,
3469 basic_block bb
, tree
*vars
)
3471 gimple
*init_stmt
= NULL
;
3473 tree def
= (gimple_in_ssa_p (cfun
)
3474 ? ssa_default_def (id
->src_cfun
, p
) : NULL
);
3476 /* Make an equivalent VAR_DECL. Note that we must NOT remap the type
3477 here since the type of this decl must be visible to the calling
3479 var
= copy_decl_to_var (p
, id
);
3481 /* Declare this new variable. */
3482 DECL_CHAIN (var
) = *vars
;
3485 /* Make gimplifier happy about this variable. */
3486 DECL_SEEN_IN_BIND_EXPR_P (var
) = 1;
3488 /* If the parameter is never assigned to, has no SSA_NAMEs created,
3489 we would not need to create a new variable here at all, if it
3490 weren't for debug info. Still, we can just use the argument
3492 if (TREE_READONLY (p
)
3493 && !TREE_ADDRESSABLE (p
)
3495 && !TREE_SIDE_EFFECTS (value
)
3498 /* We may produce non-gimple trees by adding NOPs or introduce invalid
3499 sharing when the value is not constant or DECL. And we need to make
3500 sure that it cannot be modified from another path in the callee. */
3501 if (((is_gimple_min_invariant (value
)
3502 /* When the parameter is used in a context that forces it to
3503 not be a GIMPLE register avoid substituting something that
3504 is not a decl there. */
3505 && ! DECL_NOT_GIMPLE_REG_P (p
))
3506 || (DECL_P (value
) && TREE_READONLY (value
))
3507 || (auto_var_in_fn_p (value
, id
->dst_fn
)
3508 && !TREE_ADDRESSABLE (value
)))
3509 && useless_type_conversion_p (TREE_TYPE (p
), TREE_TYPE (value
))
3510 /* We have to be very careful about ADDR_EXPR. Make sure
3511 the base variable isn't a local variable of the inlined
3512 function, e.g., when doing recursive inlining, direct or
3513 mutually-recursive or whatever, which is why we don't
3514 just test whether fn == current_function_decl. */
3515 && ! self_inlining_addr_expr (value
, fn
))
3517 insert_decl_map (id
, p
, value
);
3519 id
->debug_map
= new hash_map
<tree
, tree
>;
3520 id
->debug_map
->put (p
, var
);
3521 return insert_init_debug_bind (id
, bb
, var
, value
, NULL
);
3525 /* Register the VAR_DECL as the equivalent for the PARM_DECL;
3526 that way, when the PARM_DECL is encountered, it will be
3527 automatically replaced by the VAR_DECL. */
3528 insert_decl_map (id
, p
, var
);
3530 /* Even if P was TREE_READONLY, the new VAR should not be. In the original
3531 code, we would have constructed a temporary, and then the function body
3532 would have never changed the value of P. However, now, we will be
3533 constructing VAR directly. Therefore, it must not be TREE_READONLY. */
3534 TREE_READONLY (var
) = 0;
3538 && value
!= error_mark_node
3539 && !useless_type_conversion_p (TREE_TYPE (p
), TREE_TYPE (value
)))
3540 rhs
= force_value_to_type (TREE_TYPE (p
), value
);
3542 /* If there is no setup required and we are in SSA, take the easy route
3543 replacing all SSA names representing the function parameter by the
3544 SSA name passed to function.
3546 We need to construct map for the variable anyway as it might be used
3547 in different SSA names when parameter is set in function.
3549 Do replacement at -O0 for const arguments replaced by constant.
3550 This is important for builtin_constant_p and other construct requiring
3551 constant argument to be visible in inlined function body. */
3552 if (gimple_in_ssa_p (cfun
) && rhs
&& def
&& is_gimple_reg (p
)
3554 || (TREE_READONLY (p
)
3555 && is_gimple_min_invariant (rhs
)))
3556 && (TREE_CODE (rhs
) == SSA_NAME
3557 || is_gimple_min_invariant (rhs
))
3558 && !SSA_NAME_OCCURS_IN_ABNORMAL_PHI (def
))
3560 insert_decl_map (id
, def
, rhs
);
3561 return insert_init_debug_bind (id
, bb
, var
, rhs
, NULL
);
3564 /* If the value of argument is never used, don't care about initializing
3566 if (optimize
&& gimple_in_ssa_p (cfun
) && !def
&& is_gimple_reg (p
))
3568 /* When there's a gross type mismatch between the passed value
3569 and the declared argument type drop it on the floor and do
3570 not bother to insert a debug bind. */
3571 if (value
&& !is_gimple_reg_type (TREE_TYPE (value
)))
3573 return insert_init_debug_bind (id
, bb
, var
, rhs
, NULL
);
3576 /* Initialize this VAR_DECL from the equivalent argument. Convert
3577 the argument to the proper type in case it was promoted. */
3580 if (rhs
== error_mark_node
)
3582 insert_decl_map (id
, p
, var
);
3583 return insert_init_debug_bind (id
, bb
, var
, rhs
, NULL
);
3586 STRIP_USELESS_TYPE_CONVERSION (rhs
);
3588 /* If we are in SSA form properly remap the default definition. */
3589 if (gimple_in_ssa_p (cfun
) && is_gimple_reg (p
))
3593 def
= remap_ssa_name (def
, id
);
3594 init_stmt
= gimple_build_assign (def
, rhs
);
3595 SSA_NAME_IS_DEFAULT_DEF (def
) = 0;
3596 set_ssa_default_def (cfun
, var
, NULL
);
3599 else if (!is_empty_type (TREE_TYPE (var
)))
3600 init_stmt
= gimple_build_assign (var
, rhs
);
3602 if (bb
&& init_stmt
)
3603 insert_init_stmt (id
, bb
, init_stmt
);
3608 /* Generate code to initialize the parameters of the function at the
3609 top of the stack in ID from the GIMPLE_CALL STMT. */
3612 initialize_inlined_parameters (copy_body_data
*id
, gimple
*stmt
,
3613 tree fn
, basic_block bb
)
3618 tree vars
= NULL_TREE
;
3619 tree static_chain
= gimple_call_chain (stmt
);
3621 /* Figure out what the parameters are. */
3622 parms
= DECL_ARGUMENTS (fn
);
3624 /* Loop through the parameter declarations, replacing each with an
3625 equivalent VAR_DECL, appropriately initialized. */
3626 for (p
= parms
, i
= 0; p
; p
= DECL_CHAIN (p
), i
++)
3629 val
= i
< gimple_call_num_args (stmt
) ? gimple_call_arg (stmt
, i
) : NULL
;
3630 setup_one_parameter (id
, p
, val
, fn
, bb
, &vars
);
3632 /* After remapping parameters remap their types. This has to be done
3633 in a second loop over all parameters to appropriately remap
3634 variable sized arrays when the size is specified in a
3635 parameter following the array. */
3636 for (p
= parms
, i
= 0; p
; p
= DECL_CHAIN (p
), i
++)
3638 tree
*varp
= id
->decl_map
->get (p
);
3639 if (varp
&& VAR_P (*varp
))
3641 tree def
= (gimple_in_ssa_p (cfun
) && is_gimple_reg (p
)
3642 ? ssa_default_def (id
->src_cfun
, p
) : NULL
);
3644 TREE_TYPE (var
) = remap_type (TREE_TYPE (var
), id
);
3645 /* Also remap the default definition if it was remapped
3646 to the default definition of the parameter replacement
3647 by the parameter setup. */
3650 tree
*defp
= id
->decl_map
->get (def
);
3652 && TREE_CODE (*defp
) == SSA_NAME
3653 && SSA_NAME_VAR (*defp
) == var
)
3654 TREE_TYPE (*defp
) = TREE_TYPE (var
);
3656 /* When not optimizing and the parameter is unused, assign to
3657 a dummy SSA name. Do this after remapping the type above. */
3659 && is_gimple_reg (p
)
3660 && i
< gimple_call_num_args (stmt
))
3662 tree val
= gimple_call_arg (stmt
, i
);
3663 if (val
!= error_mark_node
)
3665 if (!useless_type_conversion_p (TREE_TYPE (p
),
3667 val
= force_value_to_type (TREE_TYPE (p
), val
);
3668 def
= make_ssa_name (var
);
3669 gimple
*init_stmt
= gimple_build_assign (def
, val
);
3670 insert_init_stmt (id
, bb
, init_stmt
);
3676 /* Initialize the static chain. */
3677 p
= DECL_STRUCT_FUNCTION (fn
)->static_chain_decl
;
3678 gcc_assert (fn
!= current_function_decl
);
3681 /* No static chain? Seems like a bug in tree-nested.cc. */
3682 gcc_assert (static_chain
);
3684 setup_one_parameter (id
, p
, static_chain
, fn
, bb
, &vars
);
3687 /* Reverse so the variables appear in the correct order in DWARF
3689 vars
= nreverse (vars
);
3691 declare_inline_vars (id
->block
, vars
);
3695 /* Declare a return variable to replace the RESULT_DECL for the
3696 function we are calling. An appropriate DECL_STMT is returned.
3697 The USE_STMT is filled to contain a use of the declaration to
3698 indicate the return value of the function.
3700 RETURN_SLOT, if non-null is place where to store the result. It
3701 is set only for CALL_EXPR_RETURN_SLOT_OPT. MODIFY_DEST, if non-null,
3702 was the LHS of the MODIFY_EXPR to which this call is the RHS.
3704 The return value is a (possibly null) value that holds the result
3705 as seen by the caller. */
3708 declare_return_variable (copy_body_data
*id
, tree return_slot
, tree modify_dest
,
3709 basic_block entry_bb
)
3711 tree callee
= id
->src_fn
;
3712 tree result
= DECL_RESULT (callee
);
3713 tree callee_type
= TREE_TYPE (result
);
3717 /* Handle type-mismatches in the function declaration return type
3718 vs. the call expression. */
3720 caller_type
= TREE_TYPE (modify_dest
);
3721 else if (return_slot
)
3722 caller_type
= TREE_TYPE (return_slot
);
3723 else /* No LHS on the call. */
3724 caller_type
= TREE_TYPE (TREE_TYPE (callee
));
3726 /* We don't need to do anything for functions that don't return anything. */
3727 if (VOID_TYPE_P (callee_type
))
3730 /* If there was a return slot, then the return value is the
3731 dereferenced address of that object. */
3734 /* The front end shouldn't have used both return_slot and
3735 a modify expression. */
3736 gcc_assert (!modify_dest
);
3737 if (DECL_BY_REFERENCE (result
))
3739 tree return_slot_addr
= build_fold_addr_expr (return_slot
);
3740 STRIP_USELESS_TYPE_CONVERSION (return_slot_addr
);
3742 /* We are going to construct *&return_slot and we can't do that
3743 for variables believed to be not addressable.
3745 FIXME: This check possibly can match, because values returned
3746 via return slot optimization are not believed to have address
3747 taken by alias analysis. */
3748 gcc_assert (TREE_CODE (return_slot
) != SSA_NAME
);
3749 var
= return_slot_addr
;
3750 mark_addressable (return_slot
);
3755 gcc_assert (TREE_CODE (var
) != SSA_NAME
);
3756 if (TREE_ADDRESSABLE (result
))
3757 mark_addressable (var
);
3759 if (DECL_NOT_GIMPLE_REG_P (result
)
3761 DECL_NOT_GIMPLE_REG_P (var
) = 1;
3763 if (!useless_type_conversion_p (callee_type
, caller_type
))
3764 var
= build1 (VIEW_CONVERT_EXPR
, callee_type
, var
);
3770 /* All types requiring non-trivial constructors should have been handled. */
3771 gcc_assert (!TREE_ADDRESSABLE (callee_type
));
3773 /* Attempt to avoid creating a new temporary variable. */
3775 && TREE_CODE (modify_dest
) != SSA_NAME
)
3777 bool use_it
= false;
3779 /* We can't use MODIFY_DEST if there's type promotion involved. */
3780 if (!useless_type_conversion_p (callee_type
, caller_type
))
3783 /* ??? If we're assigning to a variable sized type, then we must
3784 reuse the destination variable, because we've no good way to
3785 create variable sized temporaries at this point. */
3786 else if (!poly_int_tree_p (TYPE_SIZE_UNIT (caller_type
)))
3789 /* If the callee cannot possibly modify MODIFY_DEST, then we can
3790 reuse it as the result of the call directly. Don't do this if
3791 it would promote MODIFY_DEST to addressable. */
3792 else if (TREE_ADDRESSABLE (result
))
3796 tree base_m
= get_base_address (modify_dest
);
3798 /* If the base isn't a decl, then it's a pointer, and we don't
3799 know where that's going to go. */
3800 if (!DECL_P (base_m
))
3802 else if (is_global_var (base_m
))
3804 else if (DECL_NOT_GIMPLE_REG_P (result
)
3805 && !DECL_NOT_GIMPLE_REG_P (base_m
))
3807 else if (!TREE_ADDRESSABLE (base_m
))
3819 gcc_assert (poly_int_tree_p (TYPE_SIZE_UNIT (callee_type
)));
3821 var
= copy_result_decl_to_var (result
, id
);
3822 DECL_SEEN_IN_BIND_EXPR_P (var
) = 1;
3824 /* Do not have the rest of GCC warn about this variable as it should
3825 not be visible to the user. */
3826 suppress_warning (var
/* OPT_Wuninitialized? */);
3828 declare_inline_vars (id
->block
, var
);
3830 /* Build the use expr. If the return type of the function was
3831 promoted, convert it back to the expected type. */
3833 if (!useless_type_conversion_p (caller_type
, TREE_TYPE (var
)))
3835 /* If we can match up types by promotion/demotion do so. */
3836 if (fold_convertible_p (caller_type
, var
))
3837 use
= fold_convert (caller_type
, var
);
3840 /* ??? For valid programs we should not end up here.
3841 Still if we end up with truly mismatched types here, fall back
3842 to using a MEM_REF to not leak invalid GIMPLE to the following
3844 /* Prevent var from being written into SSA form. */
3845 if (is_gimple_reg_type (TREE_TYPE (var
)))
3846 DECL_NOT_GIMPLE_REG_P (var
) = true;
3847 use
= fold_build2 (MEM_REF
, caller_type
,
3848 build_fold_addr_expr (var
),
3849 build_int_cst (ptr_type_node
, 0));
3853 STRIP_USELESS_TYPE_CONVERSION (use
);
3855 if (DECL_BY_REFERENCE (result
))
3857 TREE_ADDRESSABLE (var
) = 1;
3858 var
= build_fold_addr_expr (var
);
3862 /* Register the VAR_DECL as the equivalent for the RESULT_DECL; that
3863 way, when the RESULT_DECL is encountered, it will be
3864 automatically replaced by the VAR_DECL.
3866 When returning by reference, ensure that RESULT_DECL remaps to
3868 if (DECL_BY_REFERENCE (result
)
3869 && !is_gimple_val (var
))
3871 tree temp
= create_tmp_var (TREE_TYPE (result
), "retvalptr");
3872 insert_decl_map (id
, result
, temp
);
3873 /* When RESULT_DECL is in SSA form, we need to remap and initialize
3874 it's default_def SSA_NAME. */
3875 if (gimple_in_ssa_p (id
->src_cfun
)
3876 && is_gimple_reg (result
))
3877 if (tree default_def
= ssa_default_def (id
->src_cfun
, result
))
3879 temp
= make_ssa_name (temp
);
3880 insert_decl_map (id
, default_def
, temp
);
3882 insert_init_stmt (id
, entry_bb
, gimple_build_assign (temp
, var
));
3885 insert_decl_map (id
, result
, var
);
3887 /* Remember this so we can ignore it in remap_decls. */
3892 /* Determine if the function can be copied. If so return NULL. If
3893 not return a string describng the reason for failure. */
3896 copy_forbidden (struct function
*fun
)
3898 const char *reason
= fun
->cannot_be_copied_reason
;
3900 /* Only examine the function once. */
3901 if (fun
->cannot_be_copied_set
)
3904 /* We cannot copy a function that receives a non-local goto
3905 because we cannot remap the destination label used in the
3906 function that is performing the non-local goto. */
3907 /* ??? Actually, this should be possible, if we work at it.
3908 No doubt there's just a handful of places that simply
3909 assume it doesn't happen and don't substitute properly. */
3910 if (fun
->has_nonlocal_label
)
3912 reason
= G_("function %q+F can never be copied "
3913 "because it receives a non-local goto");
3917 if (fun
->has_forced_label_in_static
)
3919 reason
= G_("function %q+F can never be copied because it saves "
3920 "address of local label in a static variable");
3925 fun
->cannot_be_copied_reason
= reason
;
3926 fun
->cannot_be_copied_set
= true;
3931 static const char *inline_forbidden_reason
;
3933 /* A callback for walk_gimple_seq to handle statements. Returns non-null
3934 iff a function cannot be inlined. Also sets the reason why. */
3937 inline_forbidden_p_stmt (gimple_stmt_iterator
*gsi
, bool *handled_ops_p
,
3938 struct walk_stmt_info
*wip
)
3940 tree fn
= (tree
) wip
->info
;
3942 gimple
*stmt
= gsi_stmt (*gsi
);
3944 switch (gimple_code (stmt
))
3947 /* Refuse to inline alloca call unless user explicitly forced so as
3948 this may change program's memory overhead drastically when the
3949 function using alloca is called in loop. In GCC present in
3950 SPEC2000 inlining into schedule_block cause it to require 2GB of
3951 RAM instead of 256MB. Don't do so for alloca calls emitted for
3952 VLA objects as those can't cause unbounded growth (they're always
3953 wrapped inside stack_save/stack_restore regions. */
3954 if (gimple_maybe_alloca_call_p (stmt
)
3955 && !gimple_call_alloca_for_var_p (as_a
<gcall
*> (stmt
))
3956 && !lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn
)))
3958 inline_forbidden_reason
3959 = G_("function %q+F can never be inlined because it uses "
3960 "alloca (override using the always_inline attribute)");
3961 *handled_ops_p
= true;
3965 t
= gimple_call_fndecl (stmt
);
3969 /* We cannot inline functions that call setjmp. */
3970 if (setjmp_call_p (t
))
3972 inline_forbidden_reason
3973 = G_("function %q+F can never be inlined because it uses setjmp");
3974 *handled_ops_p
= true;
3978 if (DECL_BUILT_IN_CLASS (t
) == BUILT_IN_NORMAL
)
3979 switch (DECL_FUNCTION_CODE (t
))
3981 /* We cannot inline functions that take a variable number of
3983 case BUILT_IN_VA_START
:
3984 case BUILT_IN_NEXT_ARG
:
3985 case BUILT_IN_VA_END
:
3986 inline_forbidden_reason
3987 = G_("function %q+F can never be inlined because it "
3988 "uses variable argument lists");
3989 *handled_ops_p
= true;
3992 case BUILT_IN_LONGJMP
:
3993 /* We can't inline functions that call __builtin_longjmp at
3994 all. The non-local goto machinery really requires the
3995 destination be in a different function. If we allow the
3996 function calling __builtin_longjmp to be inlined into the
3997 function calling __builtin_setjmp, Things will Go Awry. */
3998 inline_forbidden_reason
3999 = G_("function %q+F can never be inlined because "
4000 "it uses setjmp-longjmp exception handling");
4001 *handled_ops_p
= true;
4004 case BUILT_IN_NONLOCAL_GOTO
:
4006 inline_forbidden_reason
4007 = G_("function %q+F can never be inlined because "
4008 "it uses non-local goto");
4009 *handled_ops_p
= true;
4012 case BUILT_IN_RETURN
:
4013 case BUILT_IN_APPLY_ARGS
:
4014 /* If a __builtin_apply_args caller would be inlined,
4015 it would be saving arguments of the function it has
4016 been inlined into. Similarly __builtin_return would
4017 return from the function the inline has been inlined into. */
4018 inline_forbidden_reason
4019 = G_("function %q+F can never be inlined because "
4020 "it uses %<__builtin_return%> or %<__builtin_apply_args%>");
4021 *handled_ops_p
= true;
4030 t
= gimple_goto_dest (stmt
);
4032 /* We will not inline a function which uses computed goto. The
4033 addresses of its local labels, which may be tucked into
4034 global storage, are of course not constant across
4035 instantiations, which causes unexpected behavior. */
4036 if (TREE_CODE (t
) != LABEL_DECL
)
4038 inline_forbidden_reason
4039 = G_("function %q+F can never be inlined "
4040 "because it contains a computed goto");
4041 *handled_ops_p
= true;
4050 *handled_ops_p
= false;
4054 /* Return true if FNDECL is a function that cannot be inlined into
4058 inline_forbidden_p (tree fndecl
)
4060 struct function
*fun
= DECL_STRUCT_FUNCTION (fndecl
);
4061 struct walk_stmt_info wi
;
4063 bool forbidden_p
= false;
4065 /* First check for shared reasons not to copy the code. */
4066 inline_forbidden_reason
= copy_forbidden (fun
);
4067 if (inline_forbidden_reason
!= NULL
)
4070 /* Next, walk the statements of the function looking for
4071 constraucts we can't handle, or are non-optimal for inlining. */
4072 hash_set
<tree
> visited_nodes
;
4073 memset (&wi
, 0, sizeof (wi
));
4074 wi
.info
= (void *) fndecl
;
4075 wi
.pset
= &visited_nodes
;
4077 /* We cannot inline a function with a variable-sized parameter because we
4078 cannot materialize a temporary of such a type in the caller if need be.
4079 Note that the return case is not symmetrical because we can guarantee
4080 that a temporary is not needed by means of CALL_EXPR_RETURN_SLOT_OPT. */
4081 for (tree parm
= DECL_ARGUMENTS (fndecl
); parm
; parm
= DECL_CHAIN (parm
))
4082 if (!poly_int_tree_p (DECL_SIZE (parm
)))
4084 inline_forbidden_reason
4085 = G_("function %q+F can never be inlined because "
4086 "it has a VLA argument");
4090 FOR_EACH_BB_FN (bb
, fun
)
4093 gimple_seq seq
= bb_seq (bb
);
4094 ret
= walk_gimple_seq (seq
, inline_forbidden_p_stmt
, NULL
, &wi
);
4095 forbidden_p
= (ret
!= NULL
);
4103 /* Return false if the function FNDECL cannot be inlined on account of its
4104 attributes, true otherwise. */
4106 function_attribute_inlinable_p (const_tree fndecl
)
4108 for (auto scoped_attributes
: targetm
.attribute_table
)
4112 for (a
= DECL_ATTRIBUTES (fndecl
); a
; a
= TREE_CHAIN (a
))
4114 const_tree name
= get_attribute_name (a
);
4116 for (const attribute_spec
&attribute
: scoped_attributes
->attributes
)
4117 if (is_attribute_p (attribute
.name
, name
))
4118 return targetm
.function_attribute_inlinable_p (fndecl
);
4125 /* Returns nonzero if FN is a function that does not have any
4126 fundamental inline blocking properties. */
4129 tree_inlinable_function_p (tree fn
)
4131 bool inlinable
= true;
4135 /* If we've already decided this function shouldn't be inlined,
4136 there's no need to check again. */
4137 if (DECL_UNINLINABLE (fn
))
4140 /* We only warn for functions declared `inline' by the user. */
4141 do_warning
= (opt_for_fn (fn
, warn_inline
)
4142 && DECL_DECLARED_INLINE_P (fn
)
4143 && !DECL_NO_INLINE_WARNING_P (fn
)
4144 && !DECL_IN_SYSTEM_HEADER (fn
));
4146 always_inline
= lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn
));
4149 && always_inline
== NULL
)
4152 warning (OPT_Winline
, "function %q+F can never be inlined because it "
4153 "is suppressed using %<-fno-inline%>", fn
);
4157 else if (!function_attribute_inlinable_p (fn
))
4160 warning (OPT_Winline
, "function %q+F can never be inlined because it "
4161 "uses attributes conflicting with inlining", fn
);
4165 else if (inline_forbidden_p (fn
))
4167 /* See if we should warn about uninlinable functions. Previously,
4168 some of these warnings would be issued while trying to expand
4169 the function inline, but that would cause multiple warnings
4170 about functions that would for example call alloca. But since
4171 this a property of the function, just one warning is enough.
4172 As a bonus we can now give more details about the reason why a
4173 function is not inlinable. */
4175 error (inline_forbidden_reason
, fn
);
4176 else if (do_warning
)
4177 warning (OPT_Winline
, inline_forbidden_reason
, fn
);
4182 /* Squirrel away the result so that we don't have to check again. */
4183 DECL_UNINLINABLE (fn
) = !inlinable
;
4188 /* Estimate the cost of a memory move of type TYPE. Use machine dependent
4189 word size and take possible memcpy call into account and return
4190 cost based on whether optimizing for size or speed according to SPEED_P. */
4193 estimate_move_cost (tree type
, bool ARG_UNUSED (speed_p
))
4197 gcc_assert (!VOID_TYPE_P (type
));
4199 if (VECTOR_TYPE_P (type
))
4201 scalar_mode inner
= SCALAR_TYPE_MODE (TREE_TYPE (type
));
4202 machine_mode simd
= targetm
.vectorize
.preferred_simd_mode (inner
);
4204 = estimated_poly_value (GET_MODE_SIZE (TYPE_MODE (type
)));
4205 int simd_mode_size
= estimated_poly_value (GET_MODE_SIZE (simd
));
4206 return ((orig_mode_size
+ simd_mode_size
- 1)
4210 size
= int_size_in_bytes (type
);
4212 if (size
< 0 || size
> MOVE_MAX_PIECES
* MOVE_RATIO (speed_p
))
4213 /* Cost of a memcpy call, 3 arguments and the call. */
4216 return ((size
+ MOVE_MAX_PIECES
- 1) / MOVE_MAX_PIECES
);
4219 /* Returns cost of operation CODE, according to WEIGHTS */
4222 estimate_operator_cost (enum tree_code code
, eni_weights
*weights
,
4223 tree op1 ATTRIBUTE_UNUSED
, tree op2
)
4227 /* These are "free" conversions, or their presumed cost
4228 is folded into other operations. */
4233 case VIEW_CONVERT_EXPR
:
4236 /* Assign cost of 1 to usual operations.
4237 ??? We may consider mapping RTL costs to this. */
4243 case POINTER_PLUS_EXPR
:
4244 case POINTER_DIFF_EXPR
:
4247 case MULT_HIGHPART_EXPR
:
4249 case ADDR_SPACE_CONVERT_EXPR
:
4250 case FIXED_CONVERT_EXPR
:
4251 case FIX_TRUNC_EXPR
:
4270 case TRUTH_ANDIF_EXPR
:
4271 case TRUTH_ORIF_EXPR
:
4272 case TRUTH_AND_EXPR
:
4274 case TRUTH_XOR_EXPR
:
4275 case TRUTH_NOT_EXPR
:
4284 case UNORDERED_EXPR
:
4295 case PREDECREMENT_EXPR
:
4296 case PREINCREMENT_EXPR
:
4297 case POSTDECREMENT_EXPR
:
4298 case POSTINCREMENT_EXPR
:
4300 case REALIGN_LOAD_EXPR
:
4302 case WIDEN_SUM_EXPR
:
4303 case WIDEN_MULT_EXPR
:
4306 case WIDEN_MULT_PLUS_EXPR
:
4307 case WIDEN_MULT_MINUS_EXPR
:
4308 case WIDEN_LSHIFT_EXPR
:
4310 case VEC_WIDEN_MULT_HI_EXPR
:
4311 case VEC_WIDEN_MULT_LO_EXPR
:
4312 case VEC_WIDEN_MULT_EVEN_EXPR
:
4313 case VEC_WIDEN_MULT_ODD_EXPR
:
4314 case VEC_UNPACK_HI_EXPR
:
4315 case VEC_UNPACK_LO_EXPR
:
4316 case VEC_UNPACK_FLOAT_HI_EXPR
:
4317 case VEC_UNPACK_FLOAT_LO_EXPR
:
4318 case VEC_UNPACK_FIX_TRUNC_HI_EXPR
:
4319 case VEC_UNPACK_FIX_TRUNC_LO_EXPR
:
4320 case VEC_PACK_TRUNC_EXPR
:
4321 case VEC_PACK_SAT_EXPR
:
4322 case VEC_PACK_FIX_TRUNC_EXPR
:
4323 case VEC_PACK_FLOAT_EXPR
:
4324 case VEC_WIDEN_LSHIFT_HI_EXPR
:
4325 case VEC_WIDEN_LSHIFT_LO_EXPR
:
4326 case VEC_DUPLICATE_EXPR
:
4327 case VEC_SERIES_EXPR
:
4331 /* Few special cases of expensive operations. This is useful
4332 to avoid inlining on functions having too many of these. */
4333 case TRUNC_DIV_EXPR
:
4335 case FLOOR_DIV_EXPR
:
4336 case ROUND_DIV_EXPR
:
4337 case EXACT_DIV_EXPR
:
4338 case TRUNC_MOD_EXPR
:
4340 case FLOOR_MOD_EXPR
:
4341 case ROUND_MOD_EXPR
:
4343 if (TREE_CODE (op2
) != INTEGER_CST
)
4344 return weights
->div_mod_cost
;
4347 /* Bit-field insertion needs several shift and mask operations. */
4348 case BIT_INSERT_EXPR
:
4352 /* We expect a copy assignment with no operator. */
4353 gcc_assert (get_gimple_rhs_class (code
) == GIMPLE_SINGLE_RHS
);
4359 /* Estimate number of instructions that will be created by expanding
4360 the statements in the statement sequence STMTS.
4361 WEIGHTS contains weights attributed to various constructs. */
4364 estimate_num_insns_seq (gimple_seq stmts
, eni_weights
*weights
)
4367 gimple_stmt_iterator gsi
;
4370 for (gsi
= gsi_start (stmts
); !gsi_end_p (gsi
); gsi_next (&gsi
))
4371 cost
+= estimate_num_insns (gsi_stmt (gsi
), weights
);
4377 /* Estimate number of instructions that will be created by expanding STMT.
4378 WEIGHTS contains weights attributed to various constructs. */
4381 estimate_num_insns (gimple
*stmt
, eni_weights
*weights
)
4384 enum gimple_code code
= gimple_code (stmt
);
4391 /* Try to estimate the cost of assignments. We have three cases to
4393 1) Simple assignments to registers;
4394 2) Stores to things that must live in memory. This includes
4395 "normal" stores to scalars, but also assignments of large
4396 structures, or constructors of big arrays;
4398 Let us look at the first two cases, assuming we have "a = b + C":
4399 <GIMPLE_ASSIGN <var_decl "a">
4400 <plus_expr <var_decl "b"> <constant C>>
4401 If "a" is a GIMPLE register, the assignment to it is free on almost
4402 any target, because "a" usually ends up in a real register. Hence
4403 the only cost of this expression comes from the PLUS_EXPR, and we
4404 can ignore the GIMPLE_ASSIGN.
4405 If "a" is not a GIMPLE register, the assignment to "a" will most
4406 likely be a real store, so the cost of the GIMPLE_ASSIGN is the cost
4407 of moving something into "a", which we compute using the function
4408 estimate_move_cost. */
4409 if (gimple_clobber_p (stmt
))
4410 return 0; /* ={v} {CLOBBER} stmt expands to nothing. */
4412 lhs
= gimple_assign_lhs (stmt
);
4413 rhs
= gimple_assign_rhs1 (stmt
);
4417 /* Account for the cost of moving to / from memory. */
4418 if (gimple_store_p (stmt
))
4419 cost
+= estimate_move_cost (TREE_TYPE (lhs
), weights
->time_based
);
4420 if (gimple_assign_load_p (stmt
))
4421 cost
+= estimate_move_cost (TREE_TYPE (rhs
), weights
->time_based
);
4423 cost
+= estimate_operator_cost (gimple_assign_rhs_code (stmt
), weights
,
4424 gimple_assign_rhs1 (stmt
),
4425 get_gimple_rhs_class (gimple_assign_rhs_code (stmt
))
4426 == GIMPLE_BINARY_RHS
4427 ? gimple_assign_rhs2 (stmt
) : NULL
);
4431 cost
= 1 + estimate_operator_cost (gimple_cond_code (stmt
), weights
,
4432 gimple_op (stmt
, 0),
4433 gimple_op (stmt
, 1));
4438 gswitch
*switch_stmt
= as_a
<gswitch
*> (stmt
);
4439 /* Take into account cost of the switch + guess 2 conditional jumps for
4442 TODO: once the switch expansion logic is sufficiently separated, we can
4443 do better job on estimating cost of the switch. */
4444 if (weights
->time_based
)
4445 cost
= floor_log2 (gimple_switch_num_labels (switch_stmt
)) * 2;
4447 cost
= gimple_switch_num_labels (switch_stmt
) * 2;
4455 if (gimple_call_internal_p (stmt
))
4457 else if ((decl
= gimple_call_fndecl (stmt
))
4458 && fndecl_built_in_p (decl
))
4460 /* Do not special case builtins where we see the body.
4461 This just confuse inliner. */
4462 struct cgraph_node
*node
;
4463 if ((node
= cgraph_node::get (decl
))
4464 && node
->definition
)
4466 /* For buitins that are likely expanded to nothing or
4467 inlined do not account operand costs. */
4468 else if (is_simple_builtin (decl
))
4470 else if (is_inexpensive_builtin (decl
))
4471 return weights
->target_builtin_call_cost
;
4472 else if (gimple_call_builtin_p (stmt
, BUILT_IN_NORMAL
))
4474 /* We canonicalize x * x to pow (x, 2.0) with -ffast-math, so
4475 specialize the cheap expansion we do here.
4476 ??? This asks for a more general solution. */
4477 switch (DECL_FUNCTION_CODE (decl
))
4482 if (TREE_CODE (gimple_call_arg (stmt
, 1)) == REAL_CST
4484 (&TREE_REAL_CST (gimple_call_arg (stmt
, 1)),
4486 return estimate_operator_cost
4487 (MULT_EXPR
, weights
, gimple_call_arg (stmt
, 0),
4488 gimple_call_arg (stmt
, 0));
4497 cost
= decl
? weights
->call_cost
: weights
->indirect_call_cost
;
4498 if (gimple_call_lhs (stmt
))
4499 cost
+= estimate_move_cost (TREE_TYPE (gimple_call_lhs (stmt
)),
4500 weights
->time_based
);
4501 for (i
= 0; i
< gimple_call_num_args (stmt
); i
++)
4503 tree arg
= gimple_call_arg (stmt
, i
);
4504 cost
+= estimate_move_cost (TREE_TYPE (arg
),
4505 weights
->time_based
);
4511 return weights
->return_cost
;
4517 case GIMPLE_PREDICT
:
4523 int count
= asm_str_count (gimple_asm_string (as_a
<gasm
*> (stmt
)));
4524 /* 1000 means infinity. This avoids overflows later
4525 with very long asm statements. */
4528 /* If this asm is asm inline, count anything as minimum size. */
4529 if (gimple_asm_inline_p (as_a
<gasm
*> (stmt
)))
4530 count
= MIN (1, count
);
4531 return MAX (1, count
);
4535 /* This is either going to be an external function call with one
4536 argument, or two register copy statements plus a goto. */
4539 case GIMPLE_EH_DISPATCH
:
4540 /* ??? This is going to turn into a switch statement. Ideally
4541 we'd have a look at the eh region and estimate the number of
4546 return estimate_num_insns_seq (
4547 gimple_bind_body (as_a
<gbind
*> (stmt
)),
4550 case GIMPLE_EH_FILTER
:
4551 return estimate_num_insns_seq (gimple_eh_filter_failure (stmt
), weights
);
4554 return estimate_num_insns_seq (gimple_catch_handler (
4555 as_a
<gcatch
*> (stmt
)),
4559 return (estimate_num_insns_seq (gimple_try_eval (stmt
), weights
)
4560 + estimate_num_insns_seq (gimple_try_cleanup (stmt
), weights
));
4562 /* OMP directives are generally very expensive. */
4564 case GIMPLE_OMP_RETURN
:
4565 case GIMPLE_OMP_SECTIONS_SWITCH
:
4566 case GIMPLE_OMP_ATOMIC_STORE
:
4567 case GIMPLE_OMP_CONTINUE
:
4568 /* ...except these, which are cheap. */
4571 case GIMPLE_OMP_ATOMIC_LOAD
:
4572 return weights
->omp_cost
;
4574 case GIMPLE_OMP_FOR
:
4575 return (weights
->omp_cost
4576 + estimate_num_insns_seq (gimple_omp_body (stmt
), weights
)
4577 + estimate_num_insns_seq (gimple_omp_for_pre_body (stmt
), weights
));
4579 case GIMPLE_OMP_PARALLEL
:
4580 case GIMPLE_OMP_TASK
:
4581 case GIMPLE_OMP_CRITICAL
:
4582 case GIMPLE_OMP_MASTER
:
4583 case GIMPLE_OMP_MASKED
:
4584 case GIMPLE_OMP_SCOPE
:
4585 case GIMPLE_OMP_TASKGROUP
:
4586 case GIMPLE_OMP_ORDERED
:
4587 case GIMPLE_OMP_SCAN
:
4588 case GIMPLE_OMP_SECTION
:
4589 case GIMPLE_OMP_SECTIONS
:
4590 case GIMPLE_OMP_STRUCTURED_BLOCK
:
4591 case GIMPLE_OMP_SINGLE
:
4592 case GIMPLE_OMP_TARGET
:
4593 case GIMPLE_OMP_TEAMS
:
4594 return (weights
->omp_cost
4595 + estimate_num_insns_seq (gimple_omp_body (stmt
), weights
));
4597 case GIMPLE_TRANSACTION
:
4598 return (weights
->tm_cost
4599 + estimate_num_insns_seq (gimple_transaction_body (
4600 as_a
<gtransaction
*> (stmt
)),
4610 /* Estimate number of instructions that will be created by expanding
4611 function FNDECL. WEIGHTS contains weights attributed to various
4615 estimate_num_insns_fn (tree fndecl
, eni_weights
*weights
)
4617 struct function
*my_function
= DECL_STRUCT_FUNCTION (fndecl
);
4618 gimple_stmt_iterator bsi
;
4622 gcc_assert (my_function
&& my_function
->cfg
);
4623 FOR_EACH_BB_FN (bb
, my_function
)
4625 for (bsi
= gsi_start_bb (bb
); !gsi_end_p (bsi
); gsi_next (&bsi
))
4626 n
+= estimate_num_insns (gsi_stmt (bsi
), weights
);
4633 /* Initializes weights used by estimate_num_insns. */
4636 init_inline_once (void)
4638 eni_size_weights
.call_cost
= 1;
4639 eni_size_weights
.indirect_call_cost
= 3;
4640 eni_size_weights
.target_builtin_call_cost
= 1;
4641 eni_size_weights
.div_mod_cost
= 1;
4642 eni_size_weights
.omp_cost
= 40;
4643 eni_size_weights
.tm_cost
= 10;
4644 eni_size_weights
.time_based
= false;
4645 eni_size_weights
.return_cost
= 1;
4647 /* Estimating time for call is difficult, since we have no idea what the
4648 called function does. In the current uses of eni_time_weights,
4649 underestimating the cost does less harm than overestimating it, so
4650 we choose a rather small value here. */
4651 eni_time_weights
.call_cost
= 10;
4652 eni_time_weights
.indirect_call_cost
= 15;
4653 eni_time_weights
.target_builtin_call_cost
= 1;
4654 eni_time_weights
.div_mod_cost
= 10;
4655 eni_time_weights
.omp_cost
= 40;
4656 eni_time_weights
.tm_cost
= 40;
4657 eni_time_weights
.time_based
= true;
4658 eni_time_weights
.return_cost
= 2;
4662 /* Install new lexical TREE_BLOCK underneath 'current_block'. */
4665 prepend_lexical_block (tree current_block
, tree new_block
)
4667 BLOCK_CHAIN (new_block
) = BLOCK_SUBBLOCKS (current_block
);
4668 BLOCK_SUBBLOCKS (current_block
) = new_block
;
4669 BLOCK_SUPERCONTEXT (new_block
) = current_block
;
4672 /* Add local variables from CALLEE to CALLER. */
4675 add_local_variables (struct function
*callee
, struct function
*caller
,
4681 FOR_EACH_LOCAL_DECL (callee
, ix
, var
)
4682 if (!can_be_nonlocal (var
, id
))
4684 tree new_var
= remap_decl (var
, id
);
4686 /* Remap debug-expressions. */
4688 && DECL_HAS_DEBUG_EXPR_P (var
)
4691 tree tem
= DECL_DEBUG_EXPR (var
);
4692 bool old_regimplify
= id
->regimplify
;
4693 id
->remapping_type_depth
++;
4694 walk_tree (&tem
, copy_tree_body_r
, id
, NULL
);
4695 id
->remapping_type_depth
--;
4696 id
->regimplify
= old_regimplify
;
4697 SET_DECL_DEBUG_EXPR (new_var
, tem
);
4698 DECL_HAS_DEBUG_EXPR_P (new_var
) = 1;
4700 add_local_decl (caller
, new_var
);
4704 /* Add to BINDINGS a debug stmt resetting SRCVAR if inlining might
4705 have brought in or introduced any debug stmts for SRCVAR. */
4708 reset_debug_binding (copy_body_data
*id
, tree srcvar
, gimple_seq
*bindings
)
4710 tree
*remappedvarp
= id
->decl_map
->get (srcvar
);
4715 if (!VAR_P (*remappedvarp
))
4718 if (*remappedvarp
== id
->retvar
)
4721 tree tvar
= target_for_debug_bind (*remappedvarp
);
4725 gdebug
*stmt
= gimple_build_debug_bind (tvar
, NULL_TREE
,
4727 gimple_seq_add_stmt (bindings
, stmt
);
4730 /* For each inlined variable for which we may have debug bind stmts,
4731 add before GSI a final debug stmt resetting it, marking the end of
4732 its life, so that var-tracking knows it doesn't have to compute
4733 further locations for it. */
4736 reset_debug_bindings (copy_body_data
*id
, gimple_stmt_iterator gsi
)
4740 gimple_seq bindings
= NULL
;
4742 if (!gimple_in_ssa_p (id
->src_cfun
))
4745 if (!opt_for_fn (id
->dst_fn
, flag_var_tracking_assignments
))
4748 for (var
= DECL_ARGUMENTS (id
->src_fn
);
4749 var
; var
= DECL_CHAIN (var
))
4750 reset_debug_binding (id
, var
, &bindings
);
4752 FOR_EACH_LOCAL_DECL (id
->src_cfun
, ix
, var
)
4753 reset_debug_binding (id
, var
, &bindings
);
4755 gsi_insert_seq_before_without_update (&gsi
, bindings
, GSI_SAME_STMT
);
4758 /* If STMT is a GIMPLE_CALL, replace it with its inline expansion. */
4761 expand_call_inline (basic_block bb
, gimple
*stmt
, copy_body_data
*id
,
4766 hash_map
<tree
, tree
> *dst
;
4767 hash_map
<tree
, tree
> *st
= NULL
;
4770 struct cgraph_edge
*cg_edge
;
4771 cgraph_inline_failed_t reason
;
4772 basic_block return_block
;
4774 gimple_stmt_iterator gsi
, stmt_gsi
;
4775 bool successfully_inlined
= false;
4776 bool purge_dead_abnormal_edges
;
4778 unsigned int prop_mask
, src_properties
;
4779 struct function
*dst_cfun
;
4782 gimple
*simtenter_stmt
= NULL
;
4783 vec
<tree
> *simtvars_save
;
4785 /* The gimplifier uses input_location in too many places, such as
4786 internal_get_tmp_var (). */
4787 location_t saved_location
= input_location
;
4788 input_location
= gimple_location (stmt
);
4790 /* From here on, we're only interested in CALL_EXPRs. */
4791 call_stmt
= dyn_cast
<gcall
*> (stmt
);
4795 cg_edge
= id
->dst_node
->get_edge (stmt
);
4796 gcc_checking_assert (cg_edge
);
4797 /* First, see if we can figure out what function is being called.
4798 If we cannot, then there is no hope of inlining the function. */
4799 if (cg_edge
->indirect_unknown_callee
)
4801 fn
= cg_edge
->callee
->decl
;
4802 gcc_checking_assert (fn
);
4804 /* If FN is a declaration of a function in a nested scope that was
4805 globally declared inline, we don't set its DECL_INITIAL.
4806 However, we can't blindly follow DECL_ABSTRACT_ORIGIN because the
4807 C++ front-end uses it for cdtors to refer to their internal
4808 declarations, that are not real functions. Fortunately those
4809 don't have trees to be saved, so we can tell by checking their
4811 if (!DECL_INITIAL (fn
)
4812 && DECL_ABSTRACT_ORIGIN (fn
)
4813 && gimple_has_body_p (DECL_ABSTRACT_ORIGIN (fn
)))
4814 fn
= DECL_ABSTRACT_ORIGIN (fn
);
4816 /* Don't try to inline functions that are not well-suited to inlining. */
4817 if (cg_edge
->inline_failed
)
4819 reason
= cg_edge
->inline_failed
;
4820 /* If this call was originally indirect, we do not want to emit any
4821 inlining related warnings or sorry messages because there are no
4822 guarantees regarding those. */
4823 if (cg_edge
->indirect_inlining_edge
)
4826 if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn
))
4827 /* For extern inline functions that get redefined we always
4828 silently ignored always_inline flag. Better behavior would
4829 be to be able to keep both bodies and use extern inline body
4830 for inlining, but we can't do that because frontends overwrite
4832 && !cg_edge
->callee
->redefined_extern_inline
4833 /* During early inline pass, report only when optimization is
4835 && (symtab
->global_info_ready
4837 || cgraph_inline_failed_type (reason
) == CIF_FINAL_ERROR
)
4838 /* PR 20090218-1_0.c. Body can be provided by another module. */
4839 && (reason
!= CIF_BODY_NOT_AVAILABLE
|| !flag_generate_lto
))
4841 error ("inlining failed in call to %<always_inline%> %q+F: %s", fn
,
4842 cgraph_inline_failed_string (reason
));
4843 if (gimple_location (stmt
) != UNKNOWN_LOCATION
)
4844 inform (gimple_location (stmt
), "called from here");
4845 else if (DECL_SOURCE_LOCATION (cfun
->decl
) != UNKNOWN_LOCATION
)
4846 inform (DECL_SOURCE_LOCATION (cfun
->decl
),
4847 "called from this function");
4849 else if (opt_for_fn (fn
, warn_inline
)
4850 && DECL_DECLARED_INLINE_P (fn
)
4851 && !DECL_NO_INLINE_WARNING_P (fn
)
4852 && !DECL_IN_SYSTEM_HEADER (fn
)
4853 && reason
!= CIF_UNSPECIFIED
4854 && !lookup_attribute ("noinline", DECL_ATTRIBUTES (fn
))
4855 /* Do not warn about not inlined recursive calls. */
4856 && !cg_edge
->recursive_p ()
4857 /* Avoid warnings during early inline pass. */
4858 && symtab
->global_info_ready
)
4860 auto_diagnostic_group d
;
4861 if (warning (OPT_Winline
, "inlining failed in call to %q+F: %s",
4862 fn
, _(cgraph_inline_failed_string (reason
))))
4864 if (gimple_location (stmt
) != UNKNOWN_LOCATION
)
4865 inform (gimple_location (stmt
), "called from here");
4866 else if (DECL_SOURCE_LOCATION (cfun
->decl
) != UNKNOWN_LOCATION
)
4867 inform (DECL_SOURCE_LOCATION (cfun
->decl
),
4868 "called from this function");
4873 id
->src_node
= cg_edge
->callee
;
4875 /* If callee is thunk, all we need is to adjust the THIS pointer
4876 and redirect to function being thunked. */
4877 if (id
->src_node
->thunk
)
4880 tree virtual_offset
= NULL
;
4881 profile_count count
= cg_edge
->count
;
4883 gimple_stmt_iterator iter
= gsi_for_stmt (stmt
);
4884 thunk_info
*info
= thunk_info::get (id
->src_node
);
4886 cgraph_edge::remove (cg_edge
);
4887 edge
= id
->src_node
->callees
->clone (id
->dst_node
, call_stmt
,
4889 profile_count::one (),
4890 profile_count::one (),
4892 edge
->count
= count
;
4893 if (info
->virtual_offset_p
)
4894 virtual_offset
= size_int (info
->virtual_value
);
4895 op
= create_tmp_reg_fn (cfun
, TREE_TYPE (gimple_call_arg (stmt
, 0)),
4897 gsi_insert_before (&iter
, gimple_build_assign (op
,
4898 gimple_call_arg (stmt
, 0)),
4900 gcc_assert (info
->this_adjusting
);
4901 op
= thunk_adjust (&iter
, op
, 1, info
->fixed_offset
,
4902 virtual_offset
, info
->indirect_offset
);
4904 gimple_call_set_arg (stmt
, 0, op
);
4905 gimple_call_set_fndecl (stmt
, edge
->callee
->decl
);
4907 id
->src_node
->remove ();
4908 successfully_inlined
= expand_call_inline (bb
, stmt
, id
, to_purge
);
4909 maybe_remove_unused_call_args (cfun
, stmt
);
4910 /* This used to return true even though we do fail to inline in
4911 some cases. See PR98525. */
4914 fn
= cg_edge
->callee
->decl
;
4915 cg_edge
->callee
->get_untransformed_body ();
4917 if (flag_checking
&& cg_edge
->callee
->decl
!= id
->dst_node
->decl
)
4918 cg_edge
->callee
->verify ();
4920 /* We will be inlining this callee. */
4921 id
->eh_lp_nr
= lookup_stmt_eh_lp (stmt
);
4923 /* Update the callers EH personality. */
4924 if (DECL_FUNCTION_PERSONALITY (fn
))
4925 DECL_FUNCTION_PERSONALITY (cg_edge
->caller
->decl
)
4926 = DECL_FUNCTION_PERSONALITY (fn
);
4928 /* Split the block before the GIMPLE_CALL. */
4929 stmt_gsi
= gsi_for_stmt (stmt
);
4930 gsi_prev (&stmt_gsi
);
4931 e
= split_block (bb
, gsi_end_p (stmt_gsi
) ? NULL
: gsi_stmt (stmt_gsi
));
4933 return_block
= e
->dest
;
4936 /* If the GIMPLE_CALL was in the last statement of BB, it may have
4937 been the source of abnormal edges. In this case, schedule
4938 the removal of dead abnormal edges. */
4939 gsi
= gsi_start_bb (return_block
);
4941 purge_dead_abnormal_edges
= gsi_end_p (gsi
);
4943 stmt_gsi
= gsi_start_bb (return_block
);
4945 /* Build a block containing code to initialize the arguments, the
4946 actual inline expansion of the body, and a label for the return
4947 statements within the function to jump to. The type of the
4948 statement expression is the return type of the function call.
4949 ??? If the call does not have an associated block then we will
4950 remap all callee blocks to NULL, effectively dropping most of
4951 its debug information. This should only happen for calls to
4952 artificial decls inserted by the compiler itself. We need to
4953 either link the inlined blocks into the caller block tree or
4954 not refer to them in any way to not break GC for locations. */
4955 if (tree block
= gimple_block (stmt
))
4957 /* We do want to assign a not UNKNOWN_LOCATION BLOCK_SOURCE_LOCATION
4958 to make inlined_function_outer_scope_p return true on this BLOCK. */
4959 location_t loc
= LOCATION_LOCUS (gimple_location (stmt
));
4960 if (loc
== UNKNOWN_LOCATION
)
4961 loc
= LOCATION_LOCUS (DECL_SOURCE_LOCATION (fn
));
4962 if (loc
== UNKNOWN_LOCATION
)
4963 loc
= BUILTINS_LOCATION
;
4964 id
->block
= make_node (BLOCK
);
4965 BLOCK_ABSTRACT_ORIGIN (id
->block
) = DECL_ORIGIN (fn
);
4966 BLOCK_SOURCE_LOCATION (id
->block
) = loc
;
4967 prepend_lexical_block (block
, id
->block
);
4970 /* Local declarations will be replaced by their equivalents in this map. */
4972 id
->decl_map
= new hash_map
<tree
, tree
>;
4973 dst
= id
->debug_map
;
4974 id
->debug_map
= NULL
;
4975 if (flag_stack_reuse
!= SR_NONE
)
4976 id
->add_clobbers_to_eh_landing_pads
= last_basic_block_for_fn (cfun
);
4978 /* Record the function we are about to inline. */
4980 id
->src_cfun
= DECL_STRUCT_FUNCTION (fn
);
4981 id
->reset_location
= DECL_IGNORED_P (fn
);
4982 id
->call_stmt
= call_stmt
;
4983 cfun
->cfg
->full_profile
&= id
->src_cfun
->cfg
->full_profile
;
4985 /* When inlining into an OpenMP SIMD-on-SIMT loop, arrange for new automatic
4986 variables to be added to IFN_GOMP_SIMT_ENTER argument list. */
4987 dst_cfun
= DECL_STRUCT_FUNCTION (id
->dst_fn
);
4988 simtvars_save
= id
->dst_simt_vars
;
4989 if (!(dst_cfun
->curr_properties
& PROP_gimple_lomp_dev
)
4990 && (simduid
= bb
->loop_father
->simduid
) != NULL_TREE
4991 && (simduid
= ssa_default_def (dst_cfun
, simduid
)) != NULL_TREE
4992 && single_imm_use (simduid
, &use
, &simtenter_stmt
)
4993 && is_gimple_call (simtenter_stmt
)
4994 && gimple_call_internal_p (simtenter_stmt
, IFN_GOMP_SIMT_ENTER
))
4995 vec_alloc (id
->dst_simt_vars
, 0);
4997 id
->dst_simt_vars
= NULL
;
4999 if (profile_status_for_fn (id
->src_cfun
) == PROFILE_ABSENT
)
5000 profile_status_for_fn (dst_cfun
) = PROFILE_ABSENT
;
5002 /* If the src function contains an IFN_VA_ARG, then so will the dst
5003 function after inlining. Likewise for IFN_GOMP_USE_SIMT. */
5004 prop_mask
= PROP_gimple_lva
| PROP_gimple_lomp_dev
;
5005 src_properties
= id
->src_cfun
->curr_properties
& prop_mask
;
5006 if (src_properties
!= prop_mask
)
5007 dst_cfun
->curr_properties
&= src_properties
| ~prop_mask
;
5008 dst_cfun
->calls_eh_return
|= id
->src_cfun
->calls_eh_return
;
5009 id
->dst_node
->calls_declare_variant_alt
5010 |= id
->src_node
->calls_declare_variant_alt
;
5012 gcc_assert (!id
->src_cfun
->after_inlining
);
5015 if (lookup_attribute ("cold", DECL_ATTRIBUTES (fn
)))
5017 gimple_stmt_iterator si
= gsi_last_bb (bb
);
5018 gsi_insert_after (&si
, gimple_build_predict (PRED_COLD_FUNCTION
,
5022 initialize_inlined_parameters (id
, stmt
, fn
, bb
);
5023 if (debug_nonbind_markers_p
&& debug_inline_points
&& id
->block
5024 && inlined_function_outer_scope_p (id
->block
))
5026 gimple_stmt_iterator si
= gsi_last_bb (bb
);
5027 gsi_insert_after (&si
, gimple_build_debug_inline_entry
5028 (id
->block
, DECL_SOURCE_LOCATION (id
->src_fn
)),
5032 if (DECL_INITIAL (fn
))
5034 if (gimple_block (stmt
))
5038 prepend_lexical_block (id
->block
,
5039 remap_blocks (DECL_INITIAL (fn
), id
));
5040 gcc_checking_assert (BLOCK_SUBBLOCKS (id
->block
)
5041 && (BLOCK_CHAIN (BLOCK_SUBBLOCKS (id
->block
))
5043 /* Move vars for PARM_DECLs from DECL_INITIAL block to id->block,
5044 otherwise for DWARF DW_TAG_formal_parameter will not be children of
5045 DW_TAG_inlined_subroutine, but of a DW_TAG_lexical_block
5046 under it. The parameters can be then evaluated in the debugger,
5047 but don't show in backtraces. */
5048 for (var
= &BLOCK_VARS (BLOCK_SUBBLOCKS (id
->block
)); *var
; )
5049 if (TREE_CODE (DECL_ORIGIN (*var
)) == PARM_DECL
)
5052 *var
= TREE_CHAIN (v
);
5053 TREE_CHAIN (v
) = BLOCK_VARS (id
->block
);
5054 BLOCK_VARS (id
->block
) = v
;
5057 var
= &TREE_CHAIN (*var
);
5060 remap_blocks_to_null (DECL_INITIAL (fn
), id
);
5063 /* Return statements in the function body will be replaced by jumps
5064 to the RET_LABEL. */
5065 gcc_assert (DECL_INITIAL (fn
));
5066 gcc_assert (TREE_CODE (DECL_INITIAL (fn
)) == BLOCK
);
5068 /* Find the LHS to which the result of this call is assigned. */
5070 if (gimple_call_lhs (stmt
))
5072 modify_dest
= gimple_call_lhs (stmt
);
5074 /* The function which we are inlining might not return a value,
5075 in which case we should issue a warning that the function
5076 does not return a value. In that case the optimizers will
5077 see that the variable to which the value is assigned was not
5078 initialized. We do not want to issue a warning about that
5079 uninitialized variable. */
5080 if (DECL_P (modify_dest
))
5081 suppress_warning (modify_dest
, OPT_Wuninitialized
);
5083 if (gimple_call_return_slot_opt_p (call_stmt
))
5085 return_slot
= modify_dest
;
5092 /* If we are inlining a call to the C++ operator new, we don't want
5093 to use type based alias analysis on the return value. Otherwise
5094 we may get confused if the compiler sees that the inlined new
5095 function returns a pointer which was just deleted. See bug
5097 if (DECL_IS_OPERATOR_NEW_P (fn
))
5103 /* Declare the return variable for the function. */
5104 use_retvar
= declare_return_variable (id
, return_slot
, modify_dest
, bb
);
5106 /* Add local vars in this inlined callee to caller. */
5107 add_local_variables (id
->src_cfun
, cfun
, id
);
5109 if (dump_enabled_p ())
5112 snprintf (buf
, sizeof(buf
), "%4.2f",
5113 cg_edge
->sreal_frequency ().to_double ());
5114 dump_printf_loc (MSG_NOTE
| MSG_PRIORITY_INTERNALS
,
5116 "Inlining %C to %C with frequency %s\n",
5117 id
->src_node
, id
->dst_node
, buf
);
5118 if (dump_file
&& (dump_flags
& TDF_DETAILS
))
5120 id
->src_node
->dump (dump_file
);
5121 id
->dst_node
->dump (dump_file
);
5125 /* This is it. Duplicate the callee body. Assume callee is
5126 pre-gimplified. Note that we must not alter the caller
5127 function in any way before this point, as this CALL_EXPR may be
5128 a self-referential call; if we're calling ourselves, we need to
5129 duplicate our body before altering anything. */
5130 copy_body (id
, bb
, return_block
, NULL
);
5132 reset_debug_bindings (id
, stmt_gsi
);
5134 if (flag_stack_reuse
!= SR_NONE
)
5135 for (tree p
= DECL_ARGUMENTS (id
->src_fn
); p
; p
= DECL_CHAIN (p
))
5136 if (!TREE_THIS_VOLATILE (p
))
5138 /* The value associated with P is a local temporary only if
5139 there is no value associated with P in the debug map. */
5140 tree
*varp
= id
->decl_map
->get (p
);
5143 && !is_gimple_reg (*varp
)
5144 && !(id
->debug_map
&& id
->debug_map
->get (p
)))
5146 tree clobber
= build_clobber (TREE_TYPE (*varp
),
5147 CLOBBER_STORAGE_END
);
5148 gimple
*clobber_stmt
;
5149 clobber_stmt
= gimple_build_assign (*varp
, clobber
);
5150 gimple_set_location (clobber_stmt
, gimple_location (stmt
));
5151 gsi_insert_before (&stmt_gsi
, clobber_stmt
, GSI_SAME_STMT
);
5155 /* Reset the escaped solution. */
5156 if (cfun
->gimple_df
)
5158 pt_solution_reset (&cfun
->gimple_df
->escaped
);
5159 pt_solution_reset (&cfun
->gimple_df
->escaped_return
);
5162 /* Add new automatic variables to IFN_GOMP_SIMT_ENTER arguments. */
5163 if (id
->dst_simt_vars
&& id
->dst_simt_vars
->length () > 0)
5165 size_t nargs
= gimple_call_num_args (simtenter_stmt
);
5166 vec
<tree
> *vars
= id
->dst_simt_vars
;
5167 auto_vec
<tree
> newargs (nargs
+ vars
->length ());
5168 for (size_t i
= 0; i
< nargs
; i
++)
5169 newargs
.quick_push (gimple_call_arg (simtenter_stmt
, i
));
5170 for (tree
*pvar
= vars
->begin (); pvar
!= vars
->end (); pvar
++)
5172 tree ptrtype
= build_pointer_type (TREE_TYPE (*pvar
));
5173 newargs
.quick_push (build1 (ADDR_EXPR
, ptrtype
, *pvar
));
5175 gcall
*g
= gimple_build_call_internal_vec (IFN_GOMP_SIMT_ENTER
, newargs
);
5176 gimple_call_set_lhs (g
, gimple_call_lhs (simtenter_stmt
));
5177 gimple_stmt_iterator gsi
= gsi_for_stmt (simtenter_stmt
);
5178 gsi_replace (&gsi
, g
, false);
5180 vec_free (id
->dst_simt_vars
);
5181 id
->dst_simt_vars
= simtvars_save
;
5186 delete id
->debug_map
;
5187 id
->debug_map
= dst
;
5189 delete id
->decl_map
;
5192 /* Unlink the calls virtual operands before replacing it. */
5193 unlink_stmt_vdef (stmt
);
5194 if (gimple_vdef (stmt
)
5195 && TREE_CODE (gimple_vdef (stmt
)) == SSA_NAME
)
5196 release_ssa_name (gimple_vdef (stmt
));
5198 /* If the inlined function returns a result that we care about,
5199 substitute the GIMPLE_CALL with an assignment of the return
5200 variable to the LHS of the call. That is, if STMT was
5201 'a = foo (...)', substitute the call with 'a = USE_RETVAR'. */
5202 if (use_retvar
&& gimple_call_lhs (stmt
))
5204 gimple
*old_stmt
= stmt
;
5205 stmt
= gimple_build_assign (gimple_call_lhs (stmt
), use_retvar
);
5206 gimple_set_location (stmt
, gimple_location (old_stmt
));
5207 gsi_replace (&stmt_gsi
, stmt
, false);
5208 maybe_clean_or_replace_eh_stmt (old_stmt
, stmt
);
5209 /* Append a clobber for id->retvar if easily possible. */
5210 if (flag_stack_reuse
!= SR_NONE
5212 && VAR_P (id
->retvar
)
5213 && id
->retvar
!= return_slot
5214 && id
->retvar
!= modify_dest
5215 && !TREE_THIS_VOLATILE (id
->retvar
)
5216 && !is_gimple_reg (id
->retvar
)
5217 && !stmt_ends_bb_p (stmt
))
5219 tree clobber
= build_clobber (TREE_TYPE (id
->retvar
),
5220 CLOBBER_STORAGE_END
);
5221 gimple
*clobber_stmt
;
5222 clobber_stmt
= gimple_build_assign (id
->retvar
, clobber
);
5223 gimple_set_location (clobber_stmt
, gimple_location (old_stmt
));
5224 gsi_insert_after (&stmt_gsi
, clobber_stmt
, GSI_SAME_STMT
);
5229 /* Handle the case of inlining a function with no return
5230 statement, which causes the return value to become undefined. */
5231 if (gimple_call_lhs (stmt
)
5232 && TREE_CODE (gimple_call_lhs (stmt
)) == SSA_NAME
)
5234 tree name
= gimple_call_lhs (stmt
);
5235 tree var
= SSA_NAME_VAR (name
);
5236 tree def
= var
? ssa_default_def (cfun
, var
) : NULL
;
5240 /* If the variable is used undefined, make this name
5241 undefined via a move. */
5242 stmt
= gimple_build_assign (gimple_call_lhs (stmt
), def
);
5243 gsi_replace (&stmt_gsi
, stmt
, true);
5249 var
= create_tmp_reg_fn (cfun
, TREE_TYPE (name
), NULL
);
5250 SET_SSA_NAME_VAR_OR_IDENTIFIER (name
, var
);
5252 /* Otherwise make this variable undefined. */
5253 gsi_remove (&stmt_gsi
, true);
5254 set_ssa_default_def (cfun
, var
, name
);
5255 SSA_NAME_DEF_STMT (name
) = gimple_build_nop ();
5258 /* Replace with a clobber for id->retvar. */
5259 else if (flag_stack_reuse
!= SR_NONE
5261 && VAR_P (id
->retvar
)
5262 && id
->retvar
!= return_slot
5263 && id
->retvar
!= modify_dest
5264 && !TREE_THIS_VOLATILE (id
->retvar
)
5265 && !is_gimple_reg (id
->retvar
))
5267 tree clobber
= build_clobber (TREE_TYPE (id
->retvar
));
5268 gimple
*clobber_stmt
;
5269 clobber_stmt
= gimple_build_assign (id
->retvar
, clobber
);
5270 gimple_set_location (clobber_stmt
, gimple_location (stmt
));
5271 gsi_replace (&stmt_gsi
, clobber_stmt
, false);
5272 maybe_clean_or_replace_eh_stmt (stmt
, clobber_stmt
);
5275 gsi_remove (&stmt_gsi
, true);
5278 if (purge_dead_abnormal_edges
)
5279 bitmap_set_bit (to_purge
, return_block
->index
);
5281 /* If the value of the new expression is ignored, that's OK. We
5282 don't warn about this for CALL_EXPRs, so we shouldn't warn about
5283 the equivalent inlined version either. */
5284 if (is_gimple_assign (stmt
))
5286 gcc_assert (gimple_assign_single_p (stmt
)
5287 || CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (stmt
)));
5288 TREE_USED (gimple_assign_rhs1 (stmt
)) = 1;
5291 id
->add_clobbers_to_eh_landing_pads
= 0;
5293 /* Output the inlining info for this abstract function, since it has been
5294 inlined. If we don't do this now, we can lose the information about the
5295 variables in the function when the blocks get blown away as soon as we
5296 remove the cgraph node. */
5297 if (gimple_block (stmt
))
5298 (*debug_hooks
->outlining_inline_function
) (fn
);
5300 /* Update callgraph if needed. */
5301 cg_edge
->callee
->remove ();
5303 id
->block
= NULL_TREE
;
5304 id
->retvar
= NULL_TREE
;
5305 successfully_inlined
= true;
5308 input_location
= saved_location
;
5309 return successfully_inlined
;
5312 /* Expand call statements reachable from STMT_P.
5313 We can only have CALL_EXPRs as the "toplevel" tree code or nested
5314 in a MODIFY_EXPR. */
5317 gimple_expand_calls_inline (basic_block bb
, copy_body_data
*id
,
5320 gimple_stmt_iterator gsi
;
5321 bool inlined
= false;
5323 for (gsi
= gsi_last_bb (bb
); !gsi_end_p (gsi
);)
5325 gimple
*stmt
= gsi_stmt (gsi
);
5328 if (is_gimple_call (stmt
)
5329 && !gimple_call_internal_p (stmt
))
5330 inlined
|= expand_call_inline (bb
, stmt
, id
, to_purge
);
5337 /* Walk all basic blocks created after FIRST and try to fold every statement
5338 in the STATEMENTS pointer set. */
5341 fold_marked_statements (int first
, hash_set
<gimple
*> *statements
)
5343 auto_bitmap to_purge
;
5345 auto_vec
<edge
, 20> stack (n_basic_blocks_for_fn (cfun
) + 2);
5346 auto_sbitmap
visited (last_basic_block_for_fn (cfun
));
5347 bitmap_clear (visited
);
5349 stack
.quick_push (single_succ_edge (ENTRY_BLOCK_PTR_FOR_FN (cfun
)));
5350 while (!stack
.is_empty ())
5352 /* Look at the edge on the top of the stack. */
5353 edge e
= stack
.pop ();
5354 basic_block dest
= e
->dest
;
5356 if (dest
== EXIT_BLOCK_PTR_FOR_FN (cfun
)
5357 || bitmap_bit_p (visited
, dest
->index
))
5360 bitmap_set_bit (visited
, dest
->index
);
5362 if (dest
->index
>= first
)
5363 for (gimple_stmt_iterator gsi
= gsi_start_bb (dest
);
5364 !gsi_end_p (gsi
); gsi_next (&gsi
))
5366 if (!statements
->contains (gsi_stmt (gsi
)))
5369 gimple
*old_stmt
= gsi_stmt (gsi
);
5370 tree old_decl
= (is_gimple_call (old_stmt
)
5371 ? gimple_call_fndecl (old_stmt
) : 0);
5372 if (old_decl
&& fndecl_built_in_p (old_decl
))
5374 /* Folding builtins can create multiple instructions,
5375 we need to look at all of them. */
5376 gimple_stmt_iterator i2
= gsi
;
5378 if (fold_stmt (&gsi
))
5381 /* If a builtin at the end of a bb folded into nothing,
5382 the following loop won't work. */
5383 if (gsi_end_p (gsi
))
5385 cgraph_update_edges_for_call_stmt (old_stmt
,
5390 i2
= gsi_start_bb (dest
);
5395 new_stmt
= gsi_stmt (i2
);
5396 update_stmt (new_stmt
);
5397 cgraph_update_edges_for_call_stmt (old_stmt
, old_decl
,
5400 if (new_stmt
== gsi_stmt (gsi
))
5402 /* It is okay to check only for the very last
5403 of these statements. If it is a throwing
5404 statement nothing will change. If it isn't
5405 this can remove EH edges. If that weren't
5406 correct then because some intermediate stmts
5407 throw, but not the last one. That would mean
5408 we'd have to split the block, which we can't
5409 here and we'd loose anyway. And as builtins
5410 probably never throw, this all
5412 if (maybe_clean_or_replace_eh_stmt (old_stmt
,
5414 bitmap_set_bit (to_purge
, dest
->index
);
5421 else if (fold_stmt (&gsi
))
5423 /* Re-read the statement from GSI as fold_stmt() may
5425 gimple
*new_stmt
= gsi_stmt (gsi
);
5426 update_stmt (new_stmt
);
5428 if (is_gimple_call (old_stmt
)
5429 || is_gimple_call (new_stmt
))
5430 cgraph_update_edges_for_call_stmt (old_stmt
, old_decl
,
5433 if (maybe_clean_or_replace_eh_stmt (old_stmt
, new_stmt
))
5434 bitmap_set_bit (to_purge
, dest
->index
);
5438 if (EDGE_COUNT (dest
->succs
) > 0)
5440 /* Avoid warnings emitted from folding statements that
5441 became unreachable because of inlined function parameter
5443 e
= find_taken_edge (dest
, NULL_TREE
);
5445 stack
.quick_push (e
);
5449 FOR_EACH_EDGE (e
, ei
, dest
->succs
)
5450 stack
.safe_push (e
);
5455 gimple_purge_all_dead_eh_edges (to_purge
);
5458 /* Expand calls to inline functions in the body of FN. */
5461 optimize_inline_calls (tree fn
)
5465 int last
= n_basic_blocks_for_fn (cfun
);
5466 bool inlined_p
= false;
5469 memset (&id
, 0, sizeof (id
));
5471 id
.src_node
= id
.dst_node
= cgraph_node::get (fn
);
5472 gcc_assert (id
.dst_node
->definition
);
5474 /* Or any functions that aren't finished yet. */
5475 if (current_function_decl
)
5476 id
.dst_fn
= current_function_decl
;
5478 id
.copy_decl
= copy_decl_maybe_to_var
;
5479 id
.transform_call_graph_edges
= CB_CGE_DUPLICATE
;
5480 id
.transform_new_cfg
= false;
5481 id
.transform_return_to_modify
= true;
5482 id
.transform_parameter
= true;
5483 id
.statements_to_fold
= new hash_set
<gimple
*>;
5485 push_gimplify_context ();
5487 /* We make no attempts to keep dominance info up-to-date. */
5488 free_dominance_info (CDI_DOMINATORS
);
5489 free_dominance_info (CDI_POST_DOMINATORS
);
5491 /* Register specific gimple functions. */
5492 gimple_register_cfg_hooks ();
5494 /* Reach the trees by walking over the CFG, and note the
5495 enclosing basic-blocks in the call edges. */
5496 /* We walk the blocks going forward, because inlined function bodies
5497 will split id->current_basic_block, and the new blocks will
5498 follow it; we'll trudge through them, processing their CALL_EXPRs
5500 auto_bitmap to_purge
;
5501 FOR_EACH_BB_FN (bb
, cfun
)
5502 inlined_p
|= gimple_expand_calls_inline (bb
, &id
, to_purge
);
5504 pop_gimplify_context (NULL
);
5508 struct cgraph_edge
*e
;
5510 id
.dst_node
->verify ();
5512 /* Double check that we inlined everything we are supposed to inline. */
5513 for (e
= id
.dst_node
->callees
; e
; e
= e
->next_callee
)
5514 gcc_assert (e
->inline_failed
);
5517 /* If we didn't inline into the function there is nothing to do. */
5520 delete id
.statements_to_fold
;
5524 /* Fold queued statements. */
5525 update_max_bb_count ();
5526 fold_marked_statements (last
, id
.statements_to_fold
);
5527 delete id
.statements_to_fold
;
5529 /* Finally purge EH and abnormal edges from the call stmts we inlined.
5530 We need to do this after fold_marked_statements since that may walk
5531 the SSA use-def chain. */
5534 EXECUTE_IF_SET_IN_BITMAP (to_purge
, 0, i
, bi
)
5536 basic_block bb
= BASIC_BLOCK_FOR_FN (cfun
, i
);
5539 gimple_purge_dead_eh_edges (bb
);
5540 gimple_purge_dead_abnormal_call_edges (bb
);
5544 gcc_assert (!id
.debug_stmts
.exists ());
5546 /* Renumber the lexical scoping (non-code) blocks consecutively. */
5549 delete_unreachable_blocks_update_callgraph (id
.dst_node
, false);
5550 id
.dst_node
->calls_comdat_local
= id
.dst_node
->check_calls_comdat_local_p ();
5553 id
.dst_node
->verify ();
5555 /* It would be nice to check SSA/CFG/statement consistency here, but it is
5556 not possible yet - the IPA passes might make various functions to not
5557 throw and they don't care to proactively update local EH info. This is
5558 done later in fixup_cfg pass that also execute the verification. */
5559 return (TODO_update_ssa
5561 | (gimple_in_ssa_p (cfun
) ? TODO_remove_unused_locals
: 0)
5562 | (gimple_in_ssa_p (cfun
) ? TODO_update_address_taken
: 0));
5565 /* Passed to walk_tree. Copies the node pointed to, if appropriate. */
5568 copy_tree_r (tree
*tp
, int *walk_subtrees
, void *data ATTRIBUTE_UNUSED
)
5570 enum tree_code code
= TREE_CODE (*tp
);
5571 enum tree_code_class cl
= TREE_CODE_CLASS (code
);
5573 /* We make copies of most nodes. */
5574 if (IS_EXPR_CODE_CLASS (cl
)
5575 || code
== TREE_LIST
5577 || code
== TYPE_DECL
5578 || code
== OMP_CLAUSE
)
5580 /* Because the chain gets clobbered when we make a copy, we save it
5582 tree chain
= NULL_TREE
, new_tree
;
5584 if (CODE_CONTAINS_STRUCT (code
, TS_COMMON
))
5585 chain
= TREE_CHAIN (*tp
);
5587 /* Copy the node. */
5588 new_tree
= copy_node (*tp
);
5592 /* Now, restore the chain, if appropriate. That will cause
5593 walk_tree to walk into the chain as well. */
5594 if (code
== PARM_DECL
5595 || code
== TREE_LIST
5596 || code
== OMP_CLAUSE
)
5597 TREE_CHAIN (*tp
) = chain
;
5599 /* For now, we don't update BLOCKs when we make copies. So, we
5600 have to nullify all BIND_EXPRs. */
5601 if (TREE_CODE (*tp
) == BIND_EXPR
)
5602 BIND_EXPR_BLOCK (*tp
) = NULL_TREE
;
5604 else if (code
== CONSTRUCTOR
)
5606 /* CONSTRUCTOR nodes need special handling because
5607 we need to duplicate the vector of elements. */
5610 new_tree
= copy_node (*tp
);
5611 CONSTRUCTOR_ELTS (new_tree
) = vec_safe_copy (CONSTRUCTOR_ELTS (*tp
));
5614 else if (code
== STATEMENT_LIST
)
5615 /* We used to just abort on STATEMENT_LIST, but we can run into them
5616 with statement-expressions (c++/40975). */
5617 copy_statement_list (tp
);
5618 else if (TREE_CODE_CLASS (code
) == tcc_type
)
5620 else if (TREE_CODE_CLASS (code
) == tcc_declaration
)
5622 else if (TREE_CODE_CLASS (code
) == tcc_constant
)
5627 /* The SAVE_EXPR pointed to by TP is being copied. If ST contains
5628 information indicating to what new SAVE_EXPR this one should be mapped,
5629 use that one. Otherwise, create a new node and enter it in ST. FN is
5630 the function into which the copy will be placed. */
5633 remap_save_expr (tree
*tp
, hash_map
<tree
, tree
> *st
, int *walk_subtrees
)
5638 /* See if we already encountered this SAVE_EXPR. */
5641 /* If we didn't already remap this SAVE_EXPR, do so now. */
5644 t
= copy_node (*tp
);
5646 /* Remember this SAVE_EXPR. */
5648 /* Make sure we don't remap an already-remapped SAVE_EXPR. */
5653 /* We've already walked into this SAVE_EXPR; don't do it again. */
5658 /* Replace this SAVE_EXPR with the copy. */
5662 /* Called via walk_gimple_seq. If *GSIP points to a GIMPLE_LABEL for a local
5663 label, copies the declaration and enters it in the splay_tree in DATA (which
5664 is really a 'copy_body_data *'. */
5667 mark_local_labels_stmt (gimple_stmt_iterator
*gsip
,
5668 bool *handled_ops_p ATTRIBUTE_UNUSED
,
5669 struct walk_stmt_info
*wi
)
5671 copy_body_data
*id
= (copy_body_data
*) wi
->info
;
5672 glabel
*stmt
= dyn_cast
<glabel
*> (gsi_stmt (*gsip
));
5676 tree decl
= gimple_label_label (stmt
);
5678 /* Copy the decl and remember the copy. */
5679 insert_decl_map (id
, decl
, id
->copy_decl (decl
, id
));
5685 static gimple_seq
duplicate_remap_omp_clause_seq (gimple_seq seq
,
5686 struct walk_stmt_info
*wi
);
5688 /* Called via walk_gimple_seq by copy_gimple_seq_and_replace_local.
5689 Using the splay_tree pointed to by ST (which is really a `splay_tree'),
5690 remaps all local declarations to appropriate replacements in gimple
5694 replace_locals_op (tree
*tp
, int *walk_subtrees
, void *data
)
5696 struct walk_stmt_info
*wi
= (struct walk_stmt_info
*) data
;
5697 copy_body_data
*id
= (copy_body_data
*) wi
->info
;
5698 hash_map
<tree
, tree
> *st
= id
->decl_map
;
5702 /* For recursive invocations this is no longer the LHS itself. */
5703 bool is_lhs
= wi
->is_lhs
;
5706 if (TREE_CODE (expr
) == SSA_NAME
)
5708 *tp
= remap_ssa_name (*tp
, id
);
5711 SSA_NAME_DEF_STMT (*tp
) = gsi_stmt (wi
->gsi
);
5713 /* Only a local declaration (variable or label). */
5714 else if ((VAR_P (expr
) && !TREE_STATIC (expr
))
5715 || TREE_CODE (expr
) == LABEL_DECL
)
5717 /* Lookup the declaration. */
5720 /* If it's there, remap it. */
5725 else if (TREE_CODE (expr
) == STATEMENT_LIST
5726 || TREE_CODE (expr
) == BIND_EXPR
5727 || TREE_CODE (expr
) == SAVE_EXPR
)
5729 else if (TREE_CODE (expr
) == TARGET_EXPR
)
5731 /* Don't mess with a TARGET_EXPR that hasn't been expanded.
5732 It's OK for this to happen if it was part of a subtree that
5733 isn't immediately expanded, such as operand 2 of another
5735 if (!TREE_OPERAND (expr
, 1))
5737 TREE_OPERAND (expr
, 1) = TREE_OPERAND (expr
, 3);
5738 TREE_OPERAND (expr
, 3) = NULL_TREE
;
5741 else if (TREE_CODE (expr
) == OMP_CLAUSE
)
5743 /* Before the omplower pass completes, some OMP clauses can contain
5744 sequences that are neither copied by gimple_seq_copy nor walked by
5745 walk_gimple_seq. To make copy_gimple_seq_and_replace_locals work even
5746 in those situations, we have to copy and process them explicitely. */
5748 if (OMP_CLAUSE_CODE (expr
) == OMP_CLAUSE_LASTPRIVATE
)
5750 gimple_seq seq
= OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (expr
);
5751 seq
= duplicate_remap_omp_clause_seq (seq
, wi
);
5752 OMP_CLAUSE_LASTPRIVATE_GIMPLE_SEQ (expr
) = seq
;
5754 else if (OMP_CLAUSE_CODE (expr
) == OMP_CLAUSE_LINEAR
)
5756 gimple_seq seq
= OMP_CLAUSE_LINEAR_GIMPLE_SEQ (expr
);
5757 seq
= duplicate_remap_omp_clause_seq (seq
, wi
);
5758 OMP_CLAUSE_LINEAR_GIMPLE_SEQ (expr
) = seq
;
5760 else if (OMP_CLAUSE_CODE (expr
) == OMP_CLAUSE_REDUCTION
)
5762 gimple_seq seq
= OMP_CLAUSE_REDUCTION_GIMPLE_INIT (expr
);
5763 seq
= duplicate_remap_omp_clause_seq (seq
, wi
);
5764 OMP_CLAUSE_REDUCTION_GIMPLE_INIT (expr
) = seq
;
5765 seq
= OMP_CLAUSE_REDUCTION_GIMPLE_MERGE (expr
);
5766 seq
= duplicate_remap_omp_clause_seq (seq
, wi
);
5767 OMP_CLAUSE_REDUCTION_GIMPLE_MERGE (expr
) = seq
;
5771 /* Keep iterating. */
5776 /* Called via walk_gimple_seq by copy_gimple_seq_and_replace_local.
5777 Using the splay_tree pointed to by ST (which is really a `splay_tree'),
5778 remaps all local declarations to appropriate replacements in gimple
5782 replace_locals_stmt (gimple_stmt_iterator
*gsip
,
5783 bool *handled_ops_p ATTRIBUTE_UNUSED
,
5784 struct walk_stmt_info
*wi
)
5786 copy_body_data
*id
= (copy_body_data
*) wi
->info
;
5787 gimple
*gs
= gsi_stmt (*gsip
);
5789 if (gbind
*stmt
= dyn_cast
<gbind
*> (gs
))
5791 tree block
= gimple_bind_block (stmt
);
5795 remap_block (&block
, id
);
5796 gimple_bind_set_block (stmt
, block
);
5799 /* This will remap a lot of the same decls again, but this should be
5801 if (gimple_bind_vars (stmt
))
5803 tree old_var
, decls
= gimple_bind_vars (stmt
);
5805 for (old_var
= decls
; old_var
; old_var
= DECL_CHAIN (old_var
))
5806 if (!can_be_nonlocal (old_var
, id
)
5807 && ! variably_modified_type_p (TREE_TYPE (old_var
), id
->src_fn
))
5808 remap_decl (old_var
, id
);
5810 gcc_checking_assert (!id
->prevent_decl_creation_for_types
);
5811 id
->prevent_decl_creation_for_types
= true;
5812 gimple_bind_set_vars (stmt
, remap_decls (decls
, NULL
, id
));
5813 id
->prevent_decl_creation_for_types
= false;
5817 /* Keep iterating. */
5821 /* Create a copy of SEQ and remap all decls in it. */
5824 duplicate_remap_omp_clause_seq (gimple_seq seq
, struct walk_stmt_info
*wi
)
5829 /* If there are any labels in OMP sequences, they can be only referred to in
5830 the sequence itself and therefore we can do both here. */
5831 walk_gimple_seq (seq
, mark_local_labels_stmt
, NULL
, wi
);
5832 gimple_seq copy
= gimple_seq_copy (seq
);
5833 walk_gimple_seq (copy
, replace_locals_stmt
, replace_locals_op
, wi
);
5837 /* Copies everything in SEQ and replaces variables and labels local to
5838 current_function_decl. */
5841 copy_gimple_seq_and_replace_locals (gimple_seq seq
)
5844 struct walk_stmt_info wi
;
5847 /* There's nothing to do for NULL_TREE. */
5852 memset (&id
, 0, sizeof (id
));
5853 id
.src_fn
= current_function_decl
;
5854 id
.dst_fn
= current_function_decl
;
5856 id
.decl_map
= new hash_map
<tree
, tree
>;
5857 id
.debug_map
= NULL
;
5859 id
.copy_decl
= copy_decl_no_change
;
5860 id
.transform_call_graph_edges
= CB_CGE_DUPLICATE
;
5861 id
.transform_new_cfg
= false;
5862 id
.transform_return_to_modify
= false;
5863 id
.transform_parameter
= false;
5865 /* Walk the tree once to find local labels. */
5866 memset (&wi
, 0, sizeof (wi
));
5867 hash_set
<tree
> visited
;
5870 walk_gimple_seq (seq
, mark_local_labels_stmt
, NULL
, &wi
);
5872 copy
= gimple_seq_copy (seq
);
5874 /* Walk the copy, remapping decls. */
5875 memset (&wi
, 0, sizeof (wi
));
5877 walk_gimple_seq (copy
, replace_locals_stmt
, replace_locals_op
, &wi
);
5882 delete id
.debug_map
;
5883 if (id
.dependence_map
)
5885 delete id
.dependence_map
;
5886 id
.dependence_map
= NULL
;
5893 /* Allow someone to determine if SEARCH is a child of TOP from gdb. */
5896 debug_find_tree_1 (tree
*tp
, int *walk_subtrees ATTRIBUTE_UNUSED
, void *data
)
5905 debug_find_tree (tree top
, tree search
)
5907 return walk_tree_without_duplicates (&top
, debug_find_tree_1
, search
) != 0;
5911 /* Declare the variables created by the inliner. Add all the variables in
5912 VARS to BIND_EXPR. */
5915 declare_inline_vars (tree block
, tree vars
)
5918 for (t
= vars
; t
; t
= DECL_CHAIN (t
))
5920 DECL_SEEN_IN_BIND_EXPR_P (t
) = 1;
5921 gcc_assert (!TREE_STATIC (t
) && !TREE_ASM_WRITTEN (t
));
5922 add_local_decl (cfun
, t
);
5926 BLOCK_VARS (block
) = chainon (BLOCK_VARS (block
), vars
);
5929 /* Copy NODE (which must be a DECL). The DECL originally was in the FROM_FN,
5930 but now it will be in the TO_FN. PARM_TO_VAR means enable PARM_DECL to
5931 VAR_DECL translation. */
5934 copy_decl_for_dup_finish (copy_body_data
*id
, tree decl
, tree copy
)
5936 /* Don't generate debug information for the copy if we wouldn't have
5937 generated it for the copy either. */
5938 DECL_ARTIFICIAL (copy
) = DECL_ARTIFICIAL (decl
);
5939 DECL_IGNORED_P (copy
) = DECL_IGNORED_P (decl
);
5941 /* Set the DECL_ABSTRACT_ORIGIN so the debugging routines know what
5942 declaration inspired this copy. */
5943 DECL_ABSTRACT_ORIGIN (copy
) = DECL_ORIGIN (decl
);
5945 /* The new variable/label has no RTL, yet. */
5946 if (HAS_RTL_P (copy
)
5947 && !TREE_STATIC (copy
) && !DECL_EXTERNAL (copy
))
5948 SET_DECL_RTL (copy
, 0);
5949 /* For vector typed decls make sure to update DECL_MODE according
5950 to the new function context. */
5951 if (VECTOR_TYPE_P (TREE_TYPE (copy
)))
5952 SET_DECL_MODE (copy
, TYPE_MODE (TREE_TYPE (copy
)));
5954 /* These args would always appear unused, if not for this. */
5955 TREE_USED (copy
) = 1;
5957 /* Set the context for the new declaration. */
5958 if (!DECL_CONTEXT (decl
))
5959 /* Globals stay global. */
5961 else if (DECL_CONTEXT (decl
) != id
->src_fn
)
5962 /* Things that weren't in the scope of the function we're inlining
5963 from aren't in the scope we're inlining to, either. */
5965 else if (TREE_STATIC (decl
))
5966 /* Function-scoped static variables should stay in the original
5971 /* Ordinary automatic local variables are now in the scope of the
5973 DECL_CONTEXT (copy
) = id
->dst_fn
;
5974 if (VAR_P (copy
) && id
->dst_simt_vars
&& !is_gimple_reg (copy
))
5976 if (!lookup_attribute ("omp simt private", DECL_ATTRIBUTES (copy
)))
5977 DECL_ATTRIBUTES (copy
)
5978 = tree_cons (get_identifier ("omp simt private"), NULL
,
5979 DECL_ATTRIBUTES (copy
));
5980 id
->dst_simt_vars
->safe_push (copy
);
5987 /* Create a new VAR_DECL that is indentical in all respect to DECL except that
5988 DECL can be either a VAR_DECL, a PARM_DECL or RESULT_DECL. The original
5989 DECL must come from ID->src_fn and the copy will be part of ID->dst_fn. */
5992 copy_decl_to_var (tree decl
, copy_body_data
*id
)
5996 gcc_assert (TREE_CODE (decl
) == PARM_DECL
5997 || TREE_CODE (decl
) == RESULT_DECL
);
5999 type
= TREE_TYPE (decl
);
6001 copy
= build_decl (DECL_SOURCE_LOCATION (id
->dst_fn
),
6002 VAR_DECL
, DECL_NAME (decl
), type
);
6003 if (DECL_PT_UID_SET_P (decl
))
6004 SET_DECL_PT_UID (copy
, DECL_PT_UID (decl
));
6005 TREE_ADDRESSABLE (copy
) = TREE_ADDRESSABLE (decl
);
6006 TREE_READONLY (copy
) = TREE_READONLY (decl
);
6007 TREE_THIS_VOLATILE (copy
) = TREE_THIS_VOLATILE (decl
);
6008 DECL_NOT_GIMPLE_REG_P (copy
) = DECL_NOT_GIMPLE_REG_P (decl
);
6009 DECL_BY_REFERENCE (copy
) = DECL_BY_REFERENCE (decl
);
6011 return copy_decl_for_dup_finish (id
, decl
, copy
);
6014 /* Like copy_decl_to_var, but create a return slot object instead of a
6015 pointer variable for return by invisible reference. */
6018 copy_result_decl_to_var (tree decl
, copy_body_data
*id
)
6022 gcc_assert (TREE_CODE (decl
) == PARM_DECL
6023 || TREE_CODE (decl
) == RESULT_DECL
);
6025 type
= TREE_TYPE (decl
);
6026 if (DECL_BY_REFERENCE (decl
))
6027 type
= TREE_TYPE (type
);
6029 copy
= build_decl (DECL_SOURCE_LOCATION (id
->dst_fn
),
6030 VAR_DECL
, DECL_NAME (decl
), type
);
6031 if (DECL_PT_UID_SET_P (decl
))
6032 SET_DECL_PT_UID (copy
, DECL_PT_UID (decl
));
6033 TREE_READONLY (copy
) = TREE_READONLY (decl
);
6034 TREE_THIS_VOLATILE (copy
) = TREE_THIS_VOLATILE (decl
);
6035 if (!DECL_BY_REFERENCE (decl
))
6037 TREE_ADDRESSABLE (copy
) = TREE_ADDRESSABLE (decl
);
6038 DECL_NOT_GIMPLE_REG_P (copy
)
6039 = (DECL_NOT_GIMPLE_REG_P (decl
)
6040 /* RESULT_DECLs are treated special by needs_to_live_in_memory,
6041 mirror that to the created VAR_DECL. */
6042 || (TREE_CODE (decl
) == RESULT_DECL
6043 && aggregate_value_p (decl
, id
->src_fn
)));
6046 return copy_decl_for_dup_finish (id
, decl
, copy
);
6050 copy_decl_no_change (tree decl
, copy_body_data
*id
)
6054 copy
= copy_node (decl
);
6056 /* The COPY is not abstract; it will be generated in DST_FN. */
6057 DECL_ABSTRACT_P (copy
) = false;
6058 lang_hooks
.dup_lang_specific_decl (copy
);
6060 /* TREE_ADDRESSABLE isn't used to indicate that a label's address has
6061 been taken; it's for internal bookkeeping in expand_goto_internal. */
6062 if (TREE_CODE (copy
) == LABEL_DECL
)
6064 TREE_ADDRESSABLE (copy
) = 0;
6065 LABEL_DECL_UID (copy
) = -1;
6068 return copy_decl_for_dup_finish (id
, decl
, copy
);
6072 copy_decl_maybe_to_var (tree decl
, copy_body_data
*id
)
6074 if (TREE_CODE (decl
) == PARM_DECL
|| TREE_CODE (decl
) == RESULT_DECL
)
6075 return copy_decl_to_var (decl
, id
);
6077 return copy_decl_no_change (decl
, id
);
6080 /* Return a copy of the function's argument tree without any modifications. */
6083 copy_arguments_nochange (tree orig_parm
, copy_body_data
* id
)
6086 tree new_parm
= NULL
;
6089 for (arg
= orig_parm
; arg
; arg
= DECL_CHAIN (arg
))
6091 tree new_tree
= remap_decl (arg
, id
);
6092 if (TREE_CODE (new_tree
) != PARM_DECL
)
6093 new_tree
= id
->copy_decl (arg
, id
);
6094 lang_hooks
.dup_lang_specific_decl (new_tree
);
6096 parg
= &DECL_CHAIN (new_tree
);
6101 /* Return a copy of the function's static chain. */
6103 copy_static_chain (tree static_chain
, copy_body_data
* id
)
6105 tree
*chain_copy
, *pvar
;
6107 chain_copy
= &static_chain
;
6108 for (pvar
= chain_copy
; *pvar
; pvar
= &DECL_CHAIN (*pvar
))
6110 tree new_tree
= remap_decl (*pvar
, id
);
6111 lang_hooks
.dup_lang_specific_decl (new_tree
);
6112 DECL_CHAIN (new_tree
) = DECL_CHAIN (*pvar
);
6115 return static_chain
;
6118 /* Return true if the function is allowed to be versioned.
6119 This is a guard for the versioning functionality. */
6122 tree_versionable_function_p (tree fndecl
)
6124 return (!lookup_attribute ("noclone", DECL_ATTRIBUTES (fndecl
))
6125 && copy_forbidden (DECL_STRUCT_FUNCTION (fndecl
)) == NULL
);
6128 /* Update clone info after duplication. */
6131 update_clone_info (copy_body_data
* id
)
6133 struct cgraph_node
*this_node
= id
->dst_node
;
6134 if (!this_node
->clones
)
6136 for (cgraph_node
*node
= this_node
->clones
; node
!= this_node
;)
6138 /* First update replace maps to match the new body. */
6139 clone_info
*info
= clone_info::get (node
);
6140 if (info
&& info
->tree_map
)
6143 for (i
= 0; i
< vec_safe_length (info
->tree_map
); i
++)
6145 struct ipa_replace_map
*replace_info
;
6146 replace_info
= (*info
->tree_map
)[i
];
6147 walk_tree (&replace_info
->new_tree
, copy_tree_body_r
, id
, NULL
);
6152 node
= node
->clones
;
6153 else if (node
->next_sibling_clone
)
6154 node
= node
->next_sibling_clone
;
6157 while (node
!= id
->dst_node
&& !node
->next_sibling_clone
)
6158 node
= node
->clone_of
;
6159 if (node
!= id
->dst_node
)
6160 node
= node
->next_sibling_clone
;
6165 /* Create a copy of a function's tree.
6166 OLD_DECL and NEW_DECL are FUNCTION_DECL tree nodes
6167 of the original function and the new copied function
6168 respectively. In case we want to replace a DECL
6169 tree with another tree while duplicating the function's
6170 body, TREE_MAP represents the mapping between these
6171 trees. If UPDATE_CLONES is set, the call_stmt fields
6172 of edges of clones of the function will be updated.
6174 If non-NULL PARAM_ADJUSTMENTS determines how function prototype (i.e. the
6175 function parameters and return value) should be modified).
6176 If non-NULL BLOCKS_TO_COPY determine what basic blocks to copy.
6177 If non_NULL NEW_ENTRY determine new entry BB of the clone.
6180 tree_function_versioning (tree old_decl
, tree new_decl
,
6181 vec
<ipa_replace_map
*, va_gc
> *tree_map
,
6182 ipa_param_adjustments
*param_adjustments
,
6183 bool update_clones
, bitmap blocks_to_copy
,
6184 basic_block new_entry
)
6186 struct cgraph_node
*old_version_node
;
6187 struct cgraph_node
*new_version_node
;
6191 struct ipa_replace_map
*replace_info
;
6192 basic_block old_entry_block
, bb
;
6193 auto_vec
<gimple
*, 10> init_stmts
;
6194 tree vars
= NULL_TREE
;
6196 /* We can get called recursively from expand_call_inline via clone
6197 materialization. While expand_call_inline maintains input_location
6198 we cannot tolerate it to leak into the materialized clone. */
6199 location_t saved_location
= input_location
;
6200 input_location
= UNKNOWN_LOCATION
;
6202 gcc_assert (TREE_CODE (old_decl
) == FUNCTION_DECL
6203 && TREE_CODE (new_decl
) == FUNCTION_DECL
);
6204 DECL_POSSIBLY_INLINED (old_decl
) = 1;
6206 old_version_node
= cgraph_node::get (old_decl
);
6207 gcc_checking_assert (old_version_node
);
6208 new_version_node
= cgraph_node::get (new_decl
);
6209 gcc_checking_assert (new_version_node
);
6211 /* Copy over debug args. */
6212 if (DECL_HAS_DEBUG_ARGS_P (old_decl
))
6214 vec
<tree
, va_gc
> **new_debug_args
, **old_debug_args
;
6215 gcc_checking_assert (decl_debug_args_lookup (new_decl
) == NULL
);
6216 DECL_HAS_DEBUG_ARGS_P (new_decl
) = 0;
6217 old_debug_args
= decl_debug_args_lookup (old_decl
);
6220 new_debug_args
= decl_debug_args_insert (new_decl
);
6221 *new_debug_args
= vec_safe_copy (*old_debug_args
);
6225 /* Output the inlining info for this abstract function, since it has been
6226 inlined. If we don't do this now, we can lose the information about the
6227 variables in the function when the blocks get blown away as soon as we
6228 remove the cgraph node. */
6229 (*debug_hooks
->outlining_inline_function
) (old_decl
);
6231 DECL_ARTIFICIAL (new_decl
) = 1;
6232 DECL_ABSTRACT_ORIGIN (new_decl
) = DECL_ORIGIN (old_decl
);
6233 if (DECL_ORIGIN (old_decl
) == old_decl
)
6234 old_version_node
->used_as_abstract_origin
= true;
6235 DECL_FUNCTION_PERSONALITY (new_decl
) = DECL_FUNCTION_PERSONALITY (old_decl
);
6237 /* Prepare the data structures for the tree copy. */
6238 memset (&id
, 0, sizeof (id
));
6240 /* Generate a new name for the new version. */
6241 id
.statements_to_fold
= new hash_set
<gimple
*>;
6243 id
.decl_map
= new hash_map
<tree
, tree
>;
6244 id
.debug_map
= NULL
;
6245 id
.src_fn
= old_decl
;
6246 id
.dst_fn
= new_decl
;
6247 id
.src_node
= old_version_node
;
6248 id
.dst_node
= new_version_node
;
6249 id
.src_cfun
= DECL_STRUCT_FUNCTION (old_decl
);
6250 id
.blocks_to_copy
= blocks_to_copy
;
6252 id
.copy_decl
= copy_decl_no_change
;
6253 id
.transform_call_graph_edges
6254 = update_clones
? CB_CGE_MOVE_CLONES
: CB_CGE_MOVE
;
6255 id
.transform_new_cfg
= true;
6256 id
.transform_return_to_modify
= false;
6257 id
.transform_parameter
= false;
6259 old_entry_block
= ENTRY_BLOCK_PTR_FOR_FN (DECL_STRUCT_FUNCTION (old_decl
));
6260 DECL_RESULT (new_decl
) = DECL_RESULT (old_decl
);
6261 DECL_ARGUMENTS (new_decl
) = DECL_ARGUMENTS (old_decl
);
6262 initialize_cfun (new_decl
, old_decl
,
6263 new_entry
? new_entry
->count
: old_entry_block
->count
);
6264 new_version_node
->calls_declare_variant_alt
6265 = old_version_node
->calls_declare_variant_alt
;
6266 if (DECL_STRUCT_FUNCTION (new_decl
)->gimple_df
)
6267 DECL_STRUCT_FUNCTION (new_decl
)->gimple_df
->ipa_pta
6268 = id
.src_cfun
->gimple_df
->ipa_pta
;
6270 /* Copy the function's static chain. */
6271 p
= DECL_STRUCT_FUNCTION (old_decl
)->static_chain_decl
;
6273 DECL_STRUCT_FUNCTION (new_decl
)->static_chain_decl
6274 = copy_static_chain (p
, &id
);
6276 auto_vec
<int, 16> new_param_indices
;
6277 clone_info
*info
= clone_info::get (old_version_node
);
6278 ipa_param_adjustments
*old_param_adjustments
6279 = info
? info
->param_adjustments
: NULL
;
6280 if (old_param_adjustments
)
6281 old_param_adjustments
->get_updated_indices (&new_param_indices
);
6283 /* If there's a tree_map, prepare for substitution. */
6285 for (i
= 0; i
< tree_map
->length (); i
++)
6288 replace_info
= (*tree_map
)[i
];
6290 int p
= replace_info
->parm_num
;
6291 if (old_param_adjustments
)
6292 p
= new_param_indices
[p
];
6295 for (parm
= DECL_ARGUMENTS (old_decl
); p
;
6296 parm
= DECL_CHAIN (parm
))
6299 init
= setup_one_parameter (&id
, parm
, replace_info
->new_tree
,
6300 id
.src_fn
, NULL
, &vars
);
6302 init_stmts
.safe_push (init
);
6305 ipa_param_body_adjustments
*param_body_adjs
= NULL
;
6306 if (param_adjustments
)
6308 param_body_adjs
= new ipa_param_body_adjustments (param_adjustments
,
6310 &id
, &vars
, tree_map
);
6311 id
.param_body_adjs
= param_body_adjs
;
6312 DECL_ARGUMENTS (new_decl
) = param_body_adjs
->get_new_param_chain ();
6314 else if (DECL_ARGUMENTS (old_decl
) != NULL_TREE
)
6315 DECL_ARGUMENTS (new_decl
)
6316 = copy_arguments_nochange (DECL_ARGUMENTS (old_decl
), &id
);
6318 DECL_INITIAL (new_decl
) = remap_blocks (DECL_INITIAL (id
.src_fn
), &id
);
6319 BLOCK_SUPERCONTEXT (DECL_INITIAL (new_decl
)) = new_decl
;
6321 declare_inline_vars (DECL_INITIAL (new_decl
), vars
);
6323 if (!vec_safe_is_empty (DECL_STRUCT_FUNCTION (old_decl
)->local_decls
))
6324 /* Add local vars. */
6325 add_local_variables (DECL_STRUCT_FUNCTION (old_decl
), cfun
, &id
);
6327 if (DECL_RESULT (old_decl
) == NULL_TREE
)
6329 else if (param_adjustments
&& param_adjustments
->m_skip_return
6330 && !VOID_TYPE_P (TREE_TYPE (DECL_RESULT (old_decl
))))
6332 tree resdecl_repl
= copy_result_decl_to_var (DECL_RESULT (old_decl
),
6334 declare_inline_vars (NULL
, resdecl_repl
);
6335 if (DECL_BY_REFERENCE (DECL_RESULT (old_decl
)))
6336 resdecl_repl
= build_fold_addr_expr (resdecl_repl
);
6337 insert_decl_map (&id
, DECL_RESULT (old_decl
), resdecl_repl
);
6339 DECL_RESULT (new_decl
)
6340 = build_decl (DECL_SOURCE_LOCATION (DECL_RESULT (old_decl
)),
6341 RESULT_DECL
, NULL_TREE
, void_type_node
);
6342 DECL_CONTEXT (DECL_RESULT (new_decl
)) = new_decl
;
6343 DECL_IS_MALLOC (new_decl
) = false;
6344 cfun
->returns_struct
= 0;
6345 cfun
->returns_pcc_struct
= 0;
6350 DECL_RESULT (new_decl
) = remap_decl (DECL_RESULT (old_decl
), &id
);
6351 lang_hooks
.dup_lang_specific_decl (DECL_RESULT (new_decl
));
6352 if (gimple_in_ssa_p (id
.src_cfun
)
6353 && DECL_BY_REFERENCE (DECL_RESULT (old_decl
))
6354 && (old_name
= ssa_default_def (id
.src_cfun
, DECL_RESULT (old_decl
))))
6356 tree new_name
= make_ssa_name (DECL_RESULT (new_decl
));
6357 insert_decl_map (&id
, old_name
, new_name
);
6358 SSA_NAME_DEF_STMT (new_name
) = gimple_build_nop ();
6359 set_ssa_default_def (cfun
, DECL_RESULT (new_decl
), new_name
);
6363 /* Set up the destination functions loop tree. */
6364 if (loops_for_fn (DECL_STRUCT_FUNCTION (old_decl
)) != NULL
)
6366 cfun
->curr_properties
&= ~PROP_loops
;
6367 loop_optimizer_init (AVOID_CFG_MODIFICATIONS
);
6368 cfun
->curr_properties
|= PROP_loops
;
6371 /* Copy the Function's body. */
6372 copy_body (&id
, ENTRY_BLOCK_PTR_FOR_FN (cfun
), EXIT_BLOCK_PTR_FOR_FN (cfun
),
6375 /* Renumber the lexical scoping (non-code) blocks consecutively. */
6376 number_blocks (new_decl
);
6378 /* We want to create the BB unconditionally, so that the addition of
6379 debug stmts doesn't affect BB count, which may in the end cause
6380 codegen differences. */
6381 bb
= split_edge (single_succ_edge (ENTRY_BLOCK_PTR_FOR_FN (cfun
)));
6382 while (init_stmts
.length ())
6383 insert_init_stmt (&id
, bb
, init_stmts
.pop ());
6384 if (param_body_adjs
)
6385 param_body_adjs
->append_init_stmts (bb
);
6386 update_clone_info (&id
);
6388 /* Remap the nonlocal_goto_save_area, if any. */
6389 if (cfun
->nonlocal_goto_save_area
)
6391 struct walk_stmt_info wi
;
6393 memset (&wi
, 0, sizeof (wi
));
6395 walk_tree (&cfun
->nonlocal_goto_save_area
, remap_gimple_op_r
, &wi
, NULL
);
6401 delete id
.debug_map
;
6402 free_dominance_info (CDI_DOMINATORS
);
6403 free_dominance_info (CDI_POST_DOMINATORS
);
6405 update_max_bb_count ();
6406 fold_marked_statements (0, id
.statements_to_fold
);
6407 delete id
.statements_to_fold
;
6408 delete_unreachable_blocks_update_callgraph (id
.dst_node
, update_clones
);
6409 if (id
.dst_node
->definition
)
6410 cgraph_edge::rebuild_references ();
6411 if (loops_state_satisfies_p (LOOPS_NEED_FIXUP
))
6413 calculate_dominance_info (CDI_DOMINATORS
);
6414 fix_loop_structure (NULL
);
6416 update_ssa (TODO_update_ssa
);
6418 /* After partial cloning we need to rescale frequencies, so they are
6419 within proper range in the cloned function. */
6422 struct cgraph_edge
*e
;
6423 rebuild_frequencies ();
6425 new_version_node
->count
= ENTRY_BLOCK_PTR_FOR_FN (cfun
)->count
;
6426 for (e
= new_version_node
->callees
; e
; e
= e
->next_callee
)
6428 basic_block bb
= gimple_bb (e
->call_stmt
);
6429 e
->count
= bb
->count
;
6431 for (e
= new_version_node
->indirect_calls
; e
; e
= e
->next_callee
)
6433 basic_block bb
= gimple_bb (e
->call_stmt
);
6434 e
->count
= bb
->count
;
6438 if (param_body_adjs
&& MAY_HAVE_DEBUG_BIND_STMTS
)
6440 vec
<tree
, va_gc
> **debug_args
= NULL
;
6441 unsigned int len
= 0;
6442 unsigned reset_len
= param_body_adjs
->m_reset_debug_decls
.length ();
6444 for (i
= 0; i
< reset_len
; i
++)
6446 tree parm
= param_body_adjs
->m_reset_debug_decls
[i
];
6447 gcc_assert (is_gimple_reg (parm
));
6450 if (debug_args
== NULL
)
6452 debug_args
= decl_debug_args_insert (new_decl
);
6453 len
= vec_safe_length (*debug_args
);
6455 ddecl
= build_debug_expr_decl (TREE_TYPE (parm
));
6456 /* FIXME: Is setting the mode really necessary? */
6457 SET_DECL_MODE (ddecl
, DECL_MODE (parm
));
6458 vec_safe_push (*debug_args
, DECL_ORIGIN (parm
));
6459 vec_safe_push (*debug_args
, ddecl
);
6461 if (debug_args
!= NULL
)
6463 /* On the callee side, add
6466 stmts to the first bb where var is a VAR_DECL created for the
6467 optimized away parameter in DECL_INITIAL block. This hints
6468 in the debug info that var (whole DECL_ORIGIN is the parm
6469 PARM_DECL) is optimized away, but could be looked up at the
6470 call site as value of D#X there. */
6471 gimple_stmt_iterator cgsi
6472 = gsi_after_labels (single_succ (ENTRY_BLOCK_PTR_FOR_FN (cfun
)));
6475 i
= vec_safe_length (*debug_args
);
6478 tree vexpr
= NULL_TREE
;
6480 while (var
!= NULL_TREE
6481 && DECL_ABSTRACT_ORIGIN (var
) != (**debug_args
)[i
])
6482 var
= TREE_CHAIN (var
);
6483 if (var
== NULL_TREE
)
6485 tree parm
= (**debug_args
)[i
];
6486 if (tree parm_ddef
= ssa_default_def (id
.src_cfun
, parm
))
6488 = param_body_adjs
->m_dead_ssa_debug_equiv
.get (parm_ddef
))
6492 vexpr
= build_debug_expr_decl (TREE_TYPE (parm
));
6493 /* FIXME: Is setting the mode really necessary? */
6494 SET_DECL_MODE (vexpr
, DECL_MODE (parm
));
6496 def_temp
= gimple_build_debug_bind (var
, vexpr
, NULL
);
6497 gsi_insert_before (&cgsi
, def_temp
, GSI_NEW_STMT
);
6498 def_temp
= gimple_build_debug_source_bind (vexpr
, parm
, NULL
);
6499 gsi_insert_before (&cgsi
, def_temp
, GSI_NEW_STMT
);
6504 delete param_body_adjs
;
6505 free_dominance_info (CDI_DOMINATORS
);
6506 free_dominance_info (CDI_POST_DOMINATORS
);
6508 gcc_assert (!id
.debug_stmts
.exists ());
6510 input_location
= saved_location
;
6514 /* EXP is CALL_EXPR present in a GENERIC expression tree. Try to integrate
6515 the callee and return the inlined body on success. */
6518 maybe_inline_call_in_expr (tree exp
)
6520 tree fn
= get_callee_fndecl (exp
);
6522 /* We can only try to inline "const" functions. */
6523 if (fn
&& TREE_READONLY (fn
) && DECL_SAVED_TREE (fn
))
6525 call_expr_arg_iterator iter
;
6528 hash_map
<tree
, tree
> decl_map
;
6530 /* Remap the parameters. */
6531 for (param
= DECL_ARGUMENTS (fn
), arg
= first_call_expr_arg (exp
, &iter
);
6533 param
= DECL_CHAIN (param
), arg
= next_call_expr_arg (&iter
))
6534 decl_map
.put (param
, arg
);
6536 memset (&id
, 0, sizeof (id
));
6538 id
.dst_fn
= current_function_decl
;
6539 id
.src_cfun
= DECL_STRUCT_FUNCTION (fn
);
6540 id
.decl_map
= &decl_map
;
6542 id
.copy_decl
= copy_decl_no_change
;
6543 id
.transform_call_graph_edges
= CB_CGE_DUPLICATE
;
6544 id
.transform_new_cfg
= false;
6545 id
.transform_return_to_modify
= true;
6546 id
.transform_parameter
= true;
6548 /* Make sure not to unshare trees behind the front-end's back
6549 since front-end specific mechanisms may rely on sharing. */
6550 id
.regimplify
= false;
6551 id
.do_not_unshare
= true;
6553 /* We're not inside any EH region. */
6556 t
= copy_tree_body (&id
);
6558 /* We can only return something suitable for use in a GENERIC
6560 if (TREE_CODE (t
) == MODIFY_EXPR
)
6561 return TREE_OPERAND (t
, 1);
6567 /* Duplicate a type, fields and all. */
6570 build_duplicate_type (tree type
)
6572 struct copy_body_data id
;
6574 memset (&id
, 0, sizeof (id
));
6575 id
.src_fn
= current_function_decl
;
6576 id
.dst_fn
= current_function_decl
;
6578 id
.decl_map
= new hash_map
<tree
, tree
>;
6579 id
.debug_map
= NULL
;
6580 id
.copy_decl
= copy_decl_no_change
;
6582 type
= remap_type_1 (type
, &id
);
6586 delete id
.debug_map
;
6588 TYPE_CANONICAL (type
) = type
;
6593 /* Unshare the entire DECL_SAVED_TREE of FN and return the remapped
6594 parameters and RESULT_DECL in PARMS and RESULT. Used by C++ constexpr
6598 copy_fn (tree fn
, tree
& parms
, tree
& result
)
6602 hash_map
<tree
, tree
> decl_map
;
6607 memset (&id
, 0, sizeof (id
));
6609 id
.dst_fn
= current_function_decl
;
6610 id
.src_cfun
= DECL_STRUCT_FUNCTION (fn
);
6611 id
.decl_map
= &decl_map
;
6613 id
.copy_decl
= copy_decl_no_change
;
6614 id
.transform_call_graph_edges
= CB_CGE_DUPLICATE
;
6615 id
.transform_new_cfg
= false;
6616 id
.transform_return_to_modify
= false;
6617 id
.transform_parameter
= true;
6619 /* Make sure not to unshare trees behind the front-end's back
6620 since front-end specific mechanisms may rely on sharing. */
6621 id
.regimplify
= false;
6622 id
.do_not_unshare
= true;
6623 id
.do_not_fold
= true;
6625 /* We're not inside any EH region. */
6628 /* Remap the parameters and result and return them to the caller. */
6629 for (param
= DECL_ARGUMENTS (fn
);
6631 param
= DECL_CHAIN (param
))
6633 *p
= remap_decl (param
, &id
);
6634 p
= &DECL_CHAIN (*p
);
6637 if (DECL_RESULT (fn
))
6638 result
= remap_decl (DECL_RESULT (fn
), &id
);
6642 return copy_tree_body (&id
);