2 Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
3 Free Software Foundation, Inc.
4 Contributed by Alexandre Oliva <aoliva@redhat.com>
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
24 #include "coretypes.h"
28 #include "tree-inline.h"
34 #include "insn-config.h"
36 #include "langhooks.h"
37 #include "basic-block.h"
38 #include "tree-iterator.h"
41 #include "tree-mudflap.h"
42 #include "tree-flow.h"
45 #include "tree-flow.h"
46 #include "diagnostic.h"
49 #include "pointer-set.h"
51 #include "value-prof.h"
52 #include "tree-pass.h"
54 #include "integrate.h"
56 /* I'm not real happy about this, but we need to handle gimple and
60 /* Inlining, Cloning, Versioning, Parallelization
62 Inlining: a function body is duplicated, but the PARM_DECLs are
63 remapped into VAR_DECLs, and non-void RETURN_EXPRs become
64 MODIFY_EXPRs that store to a dedicated returned-value variable.
65 The duplicated eh_region info of the copy will later be appended
66 to the info for the caller; the eh_region info in copied throwing
67 statements and RESX statements are adjusted accordingly.
69 Cloning: (only in C++) We have one body for a con/de/structor, and
70 multiple function decls, each with a unique parameter list.
71 Duplicate the body, using the given splay tree; some parameters
72 will become constants (like 0 or 1).
74 Versioning: a function body is duplicated and the result is a new
75 function rather than into blocks of an existing function as with
76 inlining. Some parameters will become constants.
78 Parallelization: a region of a function is duplicated resulting in
79 a new function. Variables may be replaced with complex expressions
80 to enable shared variable semantics.
82 All of these will simultaneously lookup any callgraph edges. If
83 we're going to inline the duplicated function body, and the given
84 function has some cloned callgraph nodes (one for each place this
85 function will be inlined) those callgraph edges will be duplicated.
86 If we're cloning the body, those callgraph edges will be
87 updated to point into the new body. (Note that the original
88 callgraph node and edge list will not be altered.)
90 See the CALL_EXPR handling case in copy_tree_body_r (). */
94 o In order to make inlining-on-trees work, we pessimized
95 function-local static constants. In particular, they are now
96 always output, even when not addressed. Fix this by treating
97 function-local static constants just like global static
98 constants; the back-end already knows not to output them if they
101 o Provide heuristics to clamp inlining of recursive template
105 /* Weights that estimate_num_insns uses for heuristics in inlining. */
107 eni_weights eni_inlining_weights;
109 /* Weights that estimate_num_insns uses to estimate the size of the
112 eni_weights eni_size_weights;
114 /* Weights that estimate_num_insns uses to estimate the time necessary
115 to execute the produced code. */
117 eni_weights eni_time_weights;
121 static tree declare_return_variable (copy_body_data *, tree, tree);
122 static void remap_block (tree *, copy_body_data *);
123 static void copy_bind_expr (tree *, int *, copy_body_data *);
124 static tree mark_local_for_remap_r (tree *, int *, void *);
125 static void unsave_expr_1 (tree);
126 static tree unsave_r (tree *, int *, void *);
127 static void declare_inline_vars (tree, tree);
128 static void remap_save_expr (tree *, void *, int *);
129 static void prepend_lexical_block (tree current_block, tree new_block);
130 static tree copy_decl_to_var (tree, copy_body_data *);
131 static tree copy_result_decl_to_var (tree, copy_body_data *);
132 static tree copy_decl_maybe_to_var (tree, copy_body_data *);
133 static gimple remap_gimple_stmt (gimple, copy_body_data *);
134 static bool delete_unreachable_blocks_update_callgraph (copy_body_data *id);
136 /* Insert a tree->tree mapping for ID. Despite the name suggests
137 that the trees should be variables, it is used for more than that. */
140 insert_decl_map (copy_body_data *id, tree key, tree value)
142 *pointer_map_insert (id->decl_map, key) = value;
144 /* Always insert an identity map as well. If we see this same new
145 node again, we won't want to duplicate it a second time. */
147 *pointer_map_insert (id->decl_map, value) = value;
150 /* Insert a tree->tree mapping for ID. This is only used for
154 insert_debug_decl_map (copy_body_data *id, tree key, tree value)
156 if (!gimple_in_ssa_p (id->src_cfun))
159 if (!MAY_HAVE_DEBUG_STMTS)
162 if (!target_for_debug_bind (key))
165 gcc_assert (TREE_CODE (key) == PARM_DECL);
166 gcc_assert (TREE_CODE (value) == VAR_DECL);
169 id->debug_map = pointer_map_create ();
171 *pointer_map_insert (id->debug_map, key) = value;
174 /* If nonzero, we're remapping the contents of inlined debug
175 statements. If negative, an error has occurred, such as a
176 reference to a variable that isn't available in the inlined
178 static int processing_debug_stmt = 0;
180 /* Construct new SSA name for old NAME. ID is the inline context. */
183 remap_ssa_name (tree name, copy_body_data *id)
188 gcc_assert (TREE_CODE (name) == SSA_NAME);
190 n = (tree *) pointer_map_contains (id->decl_map, name);
192 return unshare_expr (*n);
194 if (processing_debug_stmt)
196 processing_debug_stmt = -1;
200 /* Do not set DEF_STMT yet as statement is not copied yet. We do that
202 new_tree = remap_decl (SSA_NAME_VAR (name), id);
204 /* We might've substituted constant or another SSA_NAME for
207 Replace the SSA name representing RESULT_DECL by variable during
208 inlining: this saves us from need to introduce PHI node in a case
209 return value is just partly initialized. */
210 if ((TREE_CODE (new_tree) == VAR_DECL || TREE_CODE (new_tree) == PARM_DECL)
211 && (TREE_CODE (SSA_NAME_VAR (name)) != RESULT_DECL
212 || !id->transform_return_to_modify))
214 new_tree = make_ssa_name (new_tree, NULL);
215 insert_decl_map (id, name, new_tree);
216 SSA_NAME_OCCURS_IN_ABNORMAL_PHI (new_tree)
217 = SSA_NAME_OCCURS_IN_ABNORMAL_PHI (name);
218 TREE_TYPE (new_tree) = TREE_TYPE (SSA_NAME_VAR (new_tree));
219 if (gimple_nop_p (SSA_NAME_DEF_STMT (name)))
221 /* By inlining function having uninitialized variable, we might
222 extend the lifetime (variable might get reused). This cause
223 ICE in the case we end up extending lifetime of SSA name across
224 abnormal edge, but also increase register pressure.
226 We simply initialize all uninitialized vars by 0 except
227 for case we are inlining to very first BB. We can avoid
228 this for all BBs that are not inside strongly connected
229 regions of the CFG, but this is expensive to test. */
231 && is_gimple_reg (SSA_NAME_VAR (name))
232 && TREE_CODE (SSA_NAME_VAR (name)) != PARM_DECL
233 && (id->entry_bb != EDGE_SUCC (ENTRY_BLOCK_PTR, 0)->dest
234 || EDGE_COUNT (id->entry_bb->preds) != 1))
236 gimple_stmt_iterator gsi = gsi_last_bb (id->entry_bb);
239 init_stmt = gimple_build_assign (new_tree,
240 fold_convert (TREE_TYPE (new_tree),
242 gsi_insert_after (&gsi, init_stmt, GSI_NEW_STMT);
243 SSA_NAME_IS_DEFAULT_DEF (new_tree) = 0;
247 SSA_NAME_DEF_STMT (new_tree) = gimple_build_nop ();
248 if (gimple_default_def (id->src_cfun, SSA_NAME_VAR (name))
250 set_default_def (SSA_NAME_VAR (new_tree), new_tree);
255 insert_decl_map (id, name, new_tree);
259 /* Remap DECL during the copying of the BLOCK tree for the function. */
262 remap_decl (tree decl, copy_body_data *id)
266 /* We only remap local variables in the current function. */
268 /* See if we have remapped this declaration. */
270 n = (tree *) pointer_map_contains (id->decl_map, decl);
272 if (!n && processing_debug_stmt)
274 processing_debug_stmt = -1;
278 /* If we didn't already have an equivalent for this declaration,
282 /* Make a copy of the variable or label. */
283 tree t = id->copy_decl (decl, id);
285 /* Remember it, so that if we encounter this local entity again
286 we can reuse this copy. Do this early because remap_type may
287 need this decl for TYPE_STUB_DECL. */
288 insert_decl_map (id, decl, t);
293 /* Remap types, if necessary. */
294 TREE_TYPE (t) = remap_type (TREE_TYPE (t), id);
295 if (TREE_CODE (t) == TYPE_DECL)
296 DECL_ORIGINAL_TYPE (t) = remap_type (DECL_ORIGINAL_TYPE (t), id);
298 /* Remap sizes as necessary. */
299 walk_tree (&DECL_SIZE (t), copy_tree_body_r, id, NULL);
300 walk_tree (&DECL_SIZE_UNIT (t), copy_tree_body_r, id, NULL);
302 /* If fields, do likewise for offset and qualifier. */
303 if (TREE_CODE (t) == FIELD_DECL)
305 walk_tree (&DECL_FIELD_OFFSET (t), copy_tree_body_r, id, NULL);
306 if (TREE_CODE (DECL_CONTEXT (t)) == QUAL_UNION_TYPE)
307 walk_tree (&DECL_QUALIFIER (t), copy_tree_body_r, id, NULL);
310 if (cfun && gimple_in_ssa_p (cfun)
311 && (TREE_CODE (t) == VAR_DECL
312 || TREE_CODE (t) == RESULT_DECL || TREE_CODE (t) == PARM_DECL))
314 tree def = gimple_default_def (id->src_cfun, decl);
316 if (TREE_CODE (decl) != PARM_DECL && def)
318 tree map = remap_ssa_name (def, id);
319 /* Watch out RESULT_DECLs whose SSA names map directly
321 if (TREE_CODE (map) == SSA_NAME
322 && gimple_nop_p (SSA_NAME_DEF_STMT (map)))
323 set_default_def (t, map);
325 add_referenced_var (t);
330 if (id->do_not_unshare)
333 return unshare_expr (*n);
337 remap_type_1 (tree type, copy_body_data *id)
341 /* We do need a copy. build and register it now. If this is a pointer or
342 reference type, remap the designated type and make a new pointer or
344 if (TREE_CODE (type) == POINTER_TYPE)
346 new_tree = build_pointer_type_for_mode (remap_type (TREE_TYPE (type), id),
348 TYPE_REF_CAN_ALIAS_ALL (type));
349 if (TYPE_ATTRIBUTES (type) || TYPE_QUALS (type))
350 new_tree = build_type_attribute_qual_variant (new_tree,
351 TYPE_ATTRIBUTES (type),
353 insert_decl_map (id, type, new_tree);
356 else if (TREE_CODE (type) == REFERENCE_TYPE)
358 new_tree = build_reference_type_for_mode (remap_type (TREE_TYPE (type), id),
360 TYPE_REF_CAN_ALIAS_ALL (type));
361 if (TYPE_ATTRIBUTES (type) || TYPE_QUALS (type))
362 new_tree = build_type_attribute_qual_variant (new_tree,
363 TYPE_ATTRIBUTES (type),
365 insert_decl_map (id, type, new_tree);
369 new_tree = copy_node (type);
371 insert_decl_map (id, type, new_tree);
373 /* This is a new type, not a copy of an old type. Need to reassociate
374 variants. We can handle everything except the main variant lazily. */
375 t = TYPE_MAIN_VARIANT (type);
378 t = remap_type (t, id);
379 TYPE_MAIN_VARIANT (new_tree) = t;
380 TYPE_NEXT_VARIANT (new_tree) = TYPE_NEXT_VARIANT (t);
381 TYPE_NEXT_VARIANT (t) = new_tree;
385 TYPE_MAIN_VARIANT (new_tree) = new_tree;
386 TYPE_NEXT_VARIANT (new_tree) = NULL;
389 if (TYPE_STUB_DECL (type))
390 TYPE_STUB_DECL (new_tree) = remap_decl (TYPE_STUB_DECL (type), id);
392 /* Lazily create pointer and reference types. */
393 TYPE_POINTER_TO (new_tree) = NULL;
394 TYPE_REFERENCE_TO (new_tree) = NULL;
396 switch (TREE_CODE (new_tree))
400 case FIXED_POINT_TYPE:
403 t = TYPE_MIN_VALUE (new_tree);
404 if (t && TREE_CODE (t) != INTEGER_CST)
405 walk_tree (&TYPE_MIN_VALUE (new_tree), copy_tree_body_r, id, NULL);
407 t = TYPE_MAX_VALUE (new_tree);
408 if (t && TREE_CODE (t) != INTEGER_CST)
409 walk_tree (&TYPE_MAX_VALUE (new_tree), copy_tree_body_r, id, NULL);
413 TREE_TYPE (new_tree) = remap_type (TREE_TYPE (new_tree), id);
414 walk_tree (&TYPE_ARG_TYPES (new_tree), copy_tree_body_r, id, NULL);
418 TREE_TYPE (new_tree) = remap_type (TREE_TYPE (new_tree), id);
419 TYPE_DOMAIN (new_tree) = remap_type (TYPE_DOMAIN (new_tree), id);
424 case QUAL_UNION_TYPE:
428 for (f = TYPE_FIELDS (new_tree); f ; f = TREE_CHAIN (f))
430 t = remap_decl (f, id);
431 DECL_CONTEXT (t) = new_tree;
435 TYPE_FIELDS (new_tree) = nreverse (nf);
441 /* Shouldn't have been thought variable sized. */
445 walk_tree (&TYPE_SIZE (new_tree), copy_tree_body_r, id, NULL);
446 walk_tree (&TYPE_SIZE_UNIT (new_tree), copy_tree_body_r, id, NULL);
452 remap_type (tree type, copy_body_data *id)
460 /* See if we have remapped this type. */
461 node = (tree *) pointer_map_contains (id->decl_map, type);
465 /* The type only needs remapping if it's variably modified. */
466 if (! variably_modified_type_p (type, id->src_fn))
468 insert_decl_map (id, type, type);
472 id->remapping_type_depth++;
473 tmp = remap_type_1 (type, id);
474 id->remapping_type_depth--;
479 /* Return previously remapped type of TYPE in ID. Return NULL if TYPE
480 is NULL or TYPE has not been remapped before. */
483 remapped_type (tree type, copy_body_data *id)
490 /* See if we have remapped this type. */
491 node = (tree *) pointer_map_contains (id->decl_map, type);
498 /* The type only needs remapping if it's variably modified. */
499 /* Decide if DECL can be put into BLOCK_NONLOCAL_VARs. */
502 can_be_nonlocal (tree decl, copy_body_data *id)
504 /* We can not duplicate function decls. */
505 if (TREE_CODE (decl) == FUNCTION_DECL)
508 /* Local static vars must be non-local or we get multiple declaration
510 if (TREE_CODE (decl) == VAR_DECL
511 && !auto_var_in_fn_p (decl, id->src_fn))
514 /* At the moment dwarf2out can handle only these types of nodes. We
515 can support more later. */
516 if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != PARM_DECL)
519 /* We must use global type. We call remapped_type instead of
520 remap_type since we don't want to remap this type here if it
521 hasn't been remapped before. */
522 if (TREE_TYPE (decl) != remapped_type (TREE_TYPE (decl), id))
525 /* Wihtout SSA we can't tell if variable is used. */
526 if (!gimple_in_ssa_p (cfun))
529 /* Live variables must be copied so we can attach DECL_RTL. */
537 remap_decls (tree decls, VEC(tree,gc) **nonlocalized_list, copy_body_data *id)
540 tree new_decls = NULL_TREE;
542 /* Remap its variables. */
543 for (old_var = decls; old_var; old_var = TREE_CHAIN (old_var))
546 tree origin_var = DECL_ORIGIN (old_var);
548 if (can_be_nonlocal (old_var, id))
550 if (TREE_CODE (old_var) == VAR_DECL
551 && ! DECL_EXTERNAL (old_var)
552 && (var_ann (old_var) || !gimple_in_ssa_p (cfun)))
553 cfun->local_decls = tree_cons (NULL_TREE, old_var,
555 if ((!optimize || debug_info_level > DINFO_LEVEL_TERSE)
556 && !DECL_IGNORED_P (old_var)
557 && nonlocalized_list)
558 VEC_safe_push (tree, gc, *nonlocalized_list, origin_var);
562 /* Remap the variable. */
563 new_var = remap_decl (old_var, id);
565 /* If we didn't remap this variable, we can't mess with its
566 TREE_CHAIN. If we remapped this variable to the return slot, it's
567 already declared somewhere else, so don't declare it here. */
569 if (new_var == id->retvar)
573 if ((!optimize || debug_info_level > DINFO_LEVEL_TERSE)
574 && !DECL_IGNORED_P (old_var)
575 && nonlocalized_list)
576 VEC_safe_push (tree, gc, *nonlocalized_list, origin_var);
580 gcc_assert (DECL_P (new_var));
581 TREE_CHAIN (new_var) = new_decls;
586 return nreverse (new_decls);
589 /* Copy the BLOCK to contain remapped versions of the variables
590 therein. And hook the new block into the block-tree. */
593 remap_block (tree *block, copy_body_data *id)
598 /* Make the new block. */
600 new_block = make_node (BLOCK);
601 TREE_USED (new_block) = TREE_USED (old_block);
602 BLOCK_ABSTRACT_ORIGIN (new_block) = old_block;
603 BLOCK_SOURCE_LOCATION (new_block) = BLOCK_SOURCE_LOCATION (old_block);
604 BLOCK_NONLOCALIZED_VARS (new_block)
605 = VEC_copy (tree, gc, BLOCK_NONLOCALIZED_VARS (old_block));
608 /* Remap its variables. */
609 BLOCK_VARS (new_block) = remap_decls (BLOCK_VARS (old_block),
610 &BLOCK_NONLOCALIZED_VARS (new_block),
613 if (id->transform_lang_insert_block)
614 id->transform_lang_insert_block (new_block);
616 /* Remember the remapped block. */
617 insert_decl_map (id, old_block, new_block);
620 /* Copy the whole block tree and root it in id->block. */
622 remap_blocks (tree block, copy_body_data *id)
625 tree new_tree = block;
630 remap_block (&new_tree, id);
631 gcc_assert (new_tree != block);
632 for (t = BLOCK_SUBBLOCKS (block); t ; t = BLOCK_CHAIN (t))
633 prepend_lexical_block (new_tree, remap_blocks (t, id));
634 /* Blocks are in arbitrary order, but make things slightly prettier and do
635 not swap order when producing a copy. */
636 BLOCK_SUBBLOCKS (new_tree) = blocks_nreverse (BLOCK_SUBBLOCKS (new_tree));
641 copy_statement_list (tree *tp)
643 tree_stmt_iterator oi, ni;
646 new_tree = alloc_stmt_list ();
647 ni = tsi_start (new_tree);
648 oi = tsi_start (*tp);
649 TREE_TYPE (new_tree) = TREE_TYPE (*tp);
652 for (; !tsi_end_p (oi); tsi_next (&oi))
654 tree stmt = tsi_stmt (oi);
655 if (TREE_CODE (stmt) == STATEMENT_LIST)
656 copy_statement_list (&stmt);
657 tsi_link_after (&ni, stmt, TSI_CONTINUE_LINKING);
662 copy_bind_expr (tree *tp, int *walk_subtrees, copy_body_data *id)
664 tree block = BIND_EXPR_BLOCK (*tp);
665 /* Copy (and replace) the statement. */
666 copy_tree_r (tp, walk_subtrees, NULL);
669 remap_block (&block, id);
670 BIND_EXPR_BLOCK (*tp) = block;
673 if (BIND_EXPR_VARS (*tp))
674 /* This will remap a lot of the same decls again, but this should be
676 BIND_EXPR_VARS (*tp) = remap_decls (BIND_EXPR_VARS (*tp), NULL, id);
680 /* Create a new gimple_seq by remapping all the statements in BODY
681 using the inlining information in ID. */
684 remap_gimple_seq (gimple_seq body, copy_body_data *id)
686 gimple_stmt_iterator si;
687 gimple_seq new_body = NULL;
689 for (si = gsi_start (body); !gsi_end_p (si); gsi_next (&si))
691 gimple new_stmt = remap_gimple_stmt (gsi_stmt (si), id);
692 gimple_seq_add_stmt (&new_body, new_stmt);
699 /* Copy a GIMPLE_BIND statement STMT, remapping all the symbols in its
700 block using the mapping information in ID. */
703 copy_gimple_bind (gimple stmt, copy_body_data *id)
706 tree new_block, new_vars;
707 gimple_seq body, new_body;
709 /* Copy the statement. Note that we purposely don't use copy_stmt
710 here because we need to remap statements as we copy. */
711 body = gimple_bind_body (stmt);
712 new_body = remap_gimple_seq (body, id);
714 new_block = gimple_bind_block (stmt);
716 remap_block (&new_block, id);
718 /* This will remap a lot of the same decls again, but this should be
720 new_vars = gimple_bind_vars (stmt);
722 new_vars = remap_decls (new_vars, NULL, id);
724 new_bind = gimple_build_bind (new_vars, new_body, new_block);
730 /* Remap the GIMPLE operand pointed to by *TP. DATA is really a
731 'struct walk_stmt_info *'. DATA->INFO is a 'copy_body_data *'.
732 WALK_SUBTREES is used to indicate walk_gimple_op whether to keep
733 recursing into the children nodes of *TP. */
736 remap_gimple_op_r (tree *tp, int *walk_subtrees, void *data)
738 struct walk_stmt_info *wi_p = (struct walk_stmt_info *) data;
739 copy_body_data *id = (copy_body_data *) wi_p->info;
740 tree fn = id->src_fn;
742 if (TREE_CODE (*tp) == SSA_NAME)
744 *tp = remap_ssa_name (*tp, id);
748 else if (auto_var_in_fn_p (*tp, fn))
750 /* Local variables and labels need to be replaced by equivalent
751 variables. We don't want to copy static variables; there's
752 only one of those, no matter how many times we inline the
753 containing function. Similarly for globals from an outer
757 /* Remap the declaration. */
758 new_decl = remap_decl (*tp, id);
759 gcc_assert (new_decl);
760 /* Replace this variable with the copy. */
761 STRIP_TYPE_NOPS (new_decl);
762 /* ??? The C++ frontend uses void * pointer zero to initialize
763 any other type. This confuses the middle-end type verification.
764 As cloned bodies do not go through gimplification again the fixup
765 there doesn't trigger. */
766 if (TREE_CODE (new_decl) == INTEGER_CST
767 && !useless_type_conversion_p (TREE_TYPE (*tp), TREE_TYPE (new_decl)))
768 new_decl = fold_convert (TREE_TYPE (*tp), new_decl);
772 else if (TREE_CODE (*tp) == STATEMENT_LIST)
774 else if (TREE_CODE (*tp) == SAVE_EXPR)
776 else if (TREE_CODE (*tp) == LABEL_DECL
777 && (!DECL_CONTEXT (*tp)
778 || decl_function_context (*tp) == id->src_fn))
779 /* These may need to be remapped for EH handling. */
780 *tp = remap_decl (*tp, id);
781 else if (TYPE_P (*tp))
782 /* Types may need remapping as well. */
783 *tp = remap_type (*tp, id);
784 else if (CONSTANT_CLASS_P (*tp))
786 /* If this is a constant, we have to copy the node iff the type
787 will be remapped. copy_tree_r will not copy a constant. */
788 tree new_type = remap_type (TREE_TYPE (*tp), id);
790 if (new_type == TREE_TYPE (*tp))
793 else if (TREE_CODE (*tp) == INTEGER_CST)
794 *tp = build_int_cst_wide (new_type, TREE_INT_CST_LOW (*tp),
795 TREE_INT_CST_HIGH (*tp));
798 *tp = copy_node (*tp);
799 TREE_TYPE (*tp) = new_type;
804 /* Otherwise, just copy the node. Note that copy_tree_r already
805 knows not to copy VAR_DECLs, etc., so this is safe. */
806 if (TREE_CODE (*tp) == INDIRECT_REF)
808 /* Get rid of *& from inline substitutions that can happen when a
809 pointer argument is an ADDR_EXPR. */
810 tree decl = TREE_OPERAND (*tp, 0);
813 n = (tree *) pointer_map_contains (id->decl_map, decl);
816 tree type, new_tree, old;
818 /* If we happen to get an ADDR_EXPR in n->value, strip
819 it manually here as we'll eventually get ADDR_EXPRs
820 which lie about their types pointed to. In this case
821 build_fold_indirect_ref wouldn't strip the
822 INDIRECT_REF, but we absolutely rely on that. As
823 fold_indirect_ref does other useful transformations,
824 try that first, though. */
825 type = TREE_TYPE (TREE_TYPE (*n));
826 new_tree = unshare_expr (*n);
828 *tp = gimple_fold_indirect_ref (new_tree);
831 if (TREE_CODE (new_tree) == ADDR_EXPR)
833 *tp = fold_indirect_ref_1 (EXPR_LOCATION (new_tree),
835 /* ??? We should either assert here or build
836 a VIEW_CONVERT_EXPR instead of blindly leaking
837 incompatible types to our IL. */
839 *tp = TREE_OPERAND (new_tree, 0);
843 *tp = build1 (INDIRECT_REF, type, new_tree);
844 TREE_THIS_VOLATILE (*tp) = TREE_THIS_VOLATILE (old);
845 TREE_NO_WARNING (*tp) = TREE_NO_WARNING (old);
853 /* Here is the "usual case". Copy this tree node, and then
854 tweak some special cases. */
855 copy_tree_r (tp, walk_subtrees, NULL);
857 /* Global variables we haven't seen yet need to go into referenced
858 vars. If not referenced from types only. */
859 if (gimple_in_ssa_p (cfun)
860 && TREE_CODE (*tp) == VAR_DECL
861 && id->remapping_type_depth == 0
862 && !processing_debug_stmt)
863 add_referenced_var (*tp);
865 /* We should never have TREE_BLOCK set on non-statements. */
867 gcc_assert (!TREE_BLOCK (*tp));
869 if (TREE_CODE (*tp) != OMP_CLAUSE)
870 TREE_TYPE (*tp) = remap_type (TREE_TYPE (*tp), id);
872 if (TREE_CODE (*tp) == TARGET_EXPR && TREE_OPERAND (*tp, 3))
874 /* The copied TARGET_EXPR has never been expanded, even if the
875 original node was expanded already. */
876 TREE_OPERAND (*tp, 1) = TREE_OPERAND (*tp, 3);
877 TREE_OPERAND (*tp, 3) = NULL_TREE;
879 else if (TREE_CODE (*tp) == ADDR_EXPR)
881 /* Variable substitution need not be simple. In particular,
882 the INDIRECT_REF substitution above. Make sure that
883 TREE_CONSTANT and friends are up-to-date. But make sure
884 to not improperly set TREE_BLOCK on some sub-expressions. */
885 int invariant = is_gimple_min_invariant (*tp);
886 tree block = id->block;
887 id->block = NULL_TREE;
888 walk_tree (&TREE_OPERAND (*tp, 0), copy_tree_body_r, id, NULL);
891 /* Handle the case where we substituted an INDIRECT_REF
892 into the operand of the ADDR_EXPR. */
893 if (TREE_CODE (TREE_OPERAND (*tp, 0)) == INDIRECT_REF)
894 *tp = TREE_OPERAND (TREE_OPERAND (*tp, 0), 0);
896 recompute_tree_invariant_for_addr_expr (*tp);
898 /* If this used to be invariant, but is not any longer,
899 then regimplification is probably needed. */
900 if (invariant && !is_gimple_min_invariant (*tp))
901 id->regimplify = true;
907 /* Keep iterating. */
912 /* Called from copy_body_id via walk_tree. DATA is really a
913 `copy_body_data *'. */
916 copy_tree_body_r (tree *tp, int *walk_subtrees, void *data)
918 copy_body_data *id = (copy_body_data *) data;
919 tree fn = id->src_fn;
922 /* Begin by recognizing trees that we'll completely rewrite for the
923 inlining context. Our output for these trees is completely
924 different from out input (e.g. RETURN_EXPR is deleted, and morphs
925 into an edge). Further down, we'll handle trees that get
926 duplicated and/or tweaked. */
928 /* When requested, RETURN_EXPRs should be transformed to just the
929 contained MODIFY_EXPR. The branch semantics of the return will
930 be handled elsewhere by manipulating the CFG rather than a statement. */
931 if (TREE_CODE (*tp) == RETURN_EXPR && id->transform_return_to_modify)
933 tree assignment = TREE_OPERAND (*tp, 0);
935 /* If we're returning something, just turn that into an
936 assignment into the equivalent of the original RESULT_DECL.
937 If the "assignment" is just the result decl, the result
938 decl has already been set (e.g. a recent "foo (&result_decl,
939 ...)"); just toss the entire RETURN_EXPR. */
940 if (assignment && TREE_CODE (assignment) == MODIFY_EXPR)
942 /* Replace the RETURN_EXPR with (a copy of) the
943 MODIFY_EXPR hanging underneath. */
944 *tp = copy_node (assignment);
946 else /* Else the RETURN_EXPR returns no value. */
949 return (tree) (void *)1;
952 else if (TREE_CODE (*tp) == SSA_NAME)
954 *tp = remap_ssa_name (*tp, id);
959 /* Local variables and labels need to be replaced by equivalent
960 variables. We don't want to copy static variables; there's only
961 one of those, no matter how many times we inline the containing
962 function. Similarly for globals from an outer function. */
963 else if (auto_var_in_fn_p (*tp, fn))
967 /* Remap the declaration. */
968 new_decl = remap_decl (*tp, id);
969 gcc_assert (new_decl);
970 /* Replace this variable with the copy. */
971 STRIP_TYPE_NOPS (new_decl);
975 else if (TREE_CODE (*tp) == STATEMENT_LIST)
976 copy_statement_list (tp);
977 else if (TREE_CODE (*tp) == SAVE_EXPR
978 || TREE_CODE (*tp) == TARGET_EXPR)
979 remap_save_expr (tp, id->decl_map, walk_subtrees);
980 else if (TREE_CODE (*tp) == LABEL_DECL
981 && (! DECL_CONTEXT (*tp)
982 || decl_function_context (*tp) == id->src_fn))
983 /* These may need to be remapped for EH handling. */
984 *tp = remap_decl (*tp, id);
985 else if (TREE_CODE (*tp) == BIND_EXPR)
986 copy_bind_expr (tp, walk_subtrees, id);
987 /* Types may need remapping as well. */
988 else if (TYPE_P (*tp))
989 *tp = remap_type (*tp, id);
991 /* If this is a constant, we have to copy the node iff the type will be
992 remapped. copy_tree_r will not copy a constant. */
993 else if (CONSTANT_CLASS_P (*tp))
995 tree new_type = remap_type (TREE_TYPE (*tp), id);
997 if (new_type == TREE_TYPE (*tp))
1000 else if (TREE_CODE (*tp) == INTEGER_CST)
1001 *tp = build_int_cst_wide (new_type, TREE_INT_CST_LOW (*tp),
1002 TREE_INT_CST_HIGH (*tp));
1005 *tp = copy_node (*tp);
1006 TREE_TYPE (*tp) = new_type;
1010 /* Otherwise, just copy the node. Note that copy_tree_r already
1011 knows not to copy VAR_DECLs, etc., so this is safe. */
1014 /* Here we handle trees that are not completely rewritten.
1015 First we detect some inlining-induced bogosities for
1017 if (TREE_CODE (*tp) == MODIFY_EXPR
1018 && TREE_OPERAND (*tp, 0) == TREE_OPERAND (*tp, 1)
1019 && (auto_var_in_fn_p (TREE_OPERAND (*tp, 0), fn)))
1021 /* Some assignments VAR = VAR; don't generate any rtl code
1022 and thus don't count as variable modification. Avoid
1023 keeping bogosities like 0 = 0. */
1024 tree decl = TREE_OPERAND (*tp, 0), value;
1027 n = (tree *) pointer_map_contains (id->decl_map, decl);
1031 STRIP_TYPE_NOPS (value);
1032 if (TREE_CONSTANT (value) || TREE_READONLY (value))
1034 *tp = build_empty_stmt (EXPR_LOCATION (*tp));
1035 return copy_tree_body_r (tp, walk_subtrees, data);
1039 else if (TREE_CODE (*tp) == INDIRECT_REF)
1041 /* Get rid of *& from inline substitutions that can happen when a
1042 pointer argument is an ADDR_EXPR. */
1043 tree decl = TREE_OPERAND (*tp, 0);
1046 n = (tree *) pointer_map_contains (id->decl_map, decl);
1051 /* If we happen to get an ADDR_EXPR in n->value, strip
1052 it manually here as we'll eventually get ADDR_EXPRs
1053 which lie about their types pointed to. In this case
1054 build_fold_indirect_ref wouldn't strip the INDIRECT_REF,
1055 but we absolutely rely on that. As fold_indirect_ref
1056 does other useful transformations, try that first, though. */
1057 tree type = TREE_TYPE (TREE_TYPE (*n));
1058 if (id->do_not_unshare)
1061 new_tree = unshare_expr (*n);
1063 *tp = gimple_fold_indirect_ref (new_tree);
1066 if (TREE_CODE (new_tree) == ADDR_EXPR)
1068 *tp = fold_indirect_ref_1 (EXPR_LOCATION (new_tree),
1070 /* ??? We should either assert here or build
1071 a VIEW_CONVERT_EXPR instead of blindly leaking
1072 incompatible types to our IL. */
1074 *tp = TREE_OPERAND (new_tree, 0);
1078 *tp = build1 (INDIRECT_REF, type, new_tree);
1079 TREE_THIS_VOLATILE (*tp) = TREE_THIS_VOLATILE (old);
1080 TREE_SIDE_EFFECTS (*tp) = TREE_SIDE_EFFECTS (old);
1088 /* Here is the "usual case". Copy this tree node, and then
1089 tweak some special cases. */
1090 copy_tree_r (tp, walk_subtrees, NULL);
1092 /* Global variables we haven't seen yet needs to go into referenced
1093 vars. If not referenced from types or debug stmts only. */
1094 if (gimple_in_ssa_p (cfun)
1095 && TREE_CODE (*tp) == VAR_DECL
1096 && id->remapping_type_depth == 0
1097 && !processing_debug_stmt)
1098 add_referenced_var (*tp);
1100 /* If EXPR has block defined, map it to newly constructed block.
1101 When inlining we want EXPRs without block appear in the block
1102 of function call if we are not remapping a type. */
1105 new_block = id->remapping_type_depth == 0 ? id->block : NULL;
1106 if (TREE_BLOCK (*tp))
1109 n = (tree *) pointer_map_contains (id->decl_map,
1114 TREE_BLOCK (*tp) = new_block;
1117 if (TREE_CODE (*tp) != OMP_CLAUSE)
1118 TREE_TYPE (*tp) = remap_type (TREE_TYPE (*tp), id);
1120 /* The copied TARGET_EXPR has never been expanded, even if the
1121 original node was expanded already. */
1122 if (TREE_CODE (*tp) == TARGET_EXPR && TREE_OPERAND (*tp, 3))
1124 TREE_OPERAND (*tp, 1) = TREE_OPERAND (*tp, 3);
1125 TREE_OPERAND (*tp, 3) = NULL_TREE;
1128 /* Variable substitution need not be simple. In particular, the
1129 INDIRECT_REF substitution above. Make sure that TREE_CONSTANT
1130 and friends are up-to-date. */
1131 else if (TREE_CODE (*tp) == ADDR_EXPR)
1133 int invariant = is_gimple_min_invariant (*tp);
1134 walk_tree (&TREE_OPERAND (*tp, 0), copy_tree_body_r, id, NULL);
1136 /* Handle the case where we substituted an INDIRECT_REF
1137 into the operand of the ADDR_EXPR. */
1138 if (TREE_CODE (TREE_OPERAND (*tp, 0)) == INDIRECT_REF)
1139 *tp = TREE_OPERAND (TREE_OPERAND (*tp, 0), 0);
1141 recompute_tree_invariant_for_addr_expr (*tp);
1143 /* If this used to be invariant, but is not any longer,
1144 then regimplification is probably needed. */
1145 if (invariant && !is_gimple_min_invariant (*tp))
1146 id->regimplify = true;
1152 /* Keep iterating. */
1156 /* Helper for remap_gimple_stmt. Given an EH region number for the
1157 source function, map that to the duplicate EH region number in
1158 the destination function. */
1161 remap_eh_region_nr (int old_nr, copy_body_data *id)
1163 eh_region old_r, new_r;
1166 old_r = get_eh_region_from_number_fn (id->src_cfun, old_nr);
1167 slot = pointer_map_contains (id->eh_map, old_r);
1168 new_r = (eh_region) *slot;
1170 return new_r->index;
1173 /* Similar, but operate on INTEGER_CSTs. */
1176 remap_eh_region_tree_nr (tree old_t_nr, copy_body_data *id)
1180 old_nr = tree_low_cst (old_t_nr, 0);
1181 new_nr = remap_eh_region_nr (old_nr, id);
1183 return build_int_cst (NULL, new_nr);
1186 /* Helper for copy_bb. Remap statement STMT using the inlining
1187 information in ID. Return the new statement copy. */
1190 remap_gimple_stmt (gimple stmt, copy_body_data *id)
1193 struct walk_stmt_info wi;
1195 bool skip_first = false;
1197 /* Begin by recognizing trees that we'll completely rewrite for the
1198 inlining context. Our output for these trees is completely
1199 different from out input (e.g. RETURN_EXPR is deleted, and morphs
1200 into an edge). Further down, we'll handle trees that get
1201 duplicated and/or tweaked. */
1203 /* When requested, GIMPLE_RETURNs should be transformed to just the
1204 contained GIMPLE_ASSIGN. The branch semantics of the return will
1205 be handled elsewhere by manipulating the CFG rather than the
1207 if (gimple_code (stmt) == GIMPLE_RETURN && id->transform_return_to_modify)
1209 tree retval = gimple_return_retval (stmt);
1211 /* If we're returning something, just turn that into an
1212 assignment into the equivalent of the original RESULT_DECL.
1213 If RETVAL is just the result decl, the result decl has
1214 already been set (e.g. a recent "foo (&result_decl, ...)");
1215 just toss the entire GIMPLE_RETURN. */
1216 if (retval && TREE_CODE (retval) != RESULT_DECL)
1218 copy = gimple_build_assign (id->retvar, retval);
1219 /* id->retvar is already substituted. Skip it on later remapping. */
1223 return gimple_build_nop ();
1225 else if (gimple_has_substatements (stmt))
1229 /* When cloning bodies from the C++ front end, we will be handed bodies
1230 in High GIMPLE form. Handle here all the High GIMPLE statements that
1231 have embedded statements. */
1232 switch (gimple_code (stmt))
1235 copy = copy_gimple_bind (stmt, id);
1239 s1 = remap_gimple_seq (gimple_catch_handler (stmt), id);
1240 copy = gimple_build_catch (gimple_catch_types (stmt), s1);
1243 case GIMPLE_EH_FILTER:
1244 s1 = remap_gimple_seq (gimple_eh_filter_failure (stmt), id);
1245 copy = gimple_build_eh_filter (gimple_eh_filter_types (stmt), s1);
1249 s1 = remap_gimple_seq (gimple_try_eval (stmt), id);
1250 s2 = remap_gimple_seq (gimple_try_cleanup (stmt), id);
1251 copy = gimple_build_try (s1, s2, gimple_try_kind (stmt));
1254 case GIMPLE_WITH_CLEANUP_EXPR:
1255 s1 = remap_gimple_seq (gimple_wce_cleanup (stmt), id);
1256 copy = gimple_build_wce (s1);
1259 case GIMPLE_OMP_PARALLEL:
1260 s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
1261 copy = gimple_build_omp_parallel
1263 gimple_omp_parallel_clauses (stmt),
1264 gimple_omp_parallel_child_fn (stmt),
1265 gimple_omp_parallel_data_arg (stmt));
1268 case GIMPLE_OMP_TASK:
1269 s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
1270 copy = gimple_build_omp_task
1272 gimple_omp_task_clauses (stmt),
1273 gimple_omp_task_child_fn (stmt),
1274 gimple_omp_task_data_arg (stmt),
1275 gimple_omp_task_copy_fn (stmt),
1276 gimple_omp_task_arg_size (stmt),
1277 gimple_omp_task_arg_align (stmt));
1280 case GIMPLE_OMP_FOR:
1281 s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
1282 s2 = remap_gimple_seq (gimple_omp_for_pre_body (stmt), id);
1283 copy = gimple_build_omp_for (s1, gimple_omp_for_clauses (stmt),
1284 gimple_omp_for_collapse (stmt), s2);
1287 for (i = 0; i < gimple_omp_for_collapse (stmt); i++)
1289 gimple_omp_for_set_index (copy, i,
1290 gimple_omp_for_index (stmt, i));
1291 gimple_omp_for_set_initial (copy, i,
1292 gimple_omp_for_initial (stmt, i));
1293 gimple_omp_for_set_final (copy, i,
1294 gimple_omp_for_final (stmt, i));
1295 gimple_omp_for_set_incr (copy, i,
1296 gimple_omp_for_incr (stmt, i));
1297 gimple_omp_for_set_cond (copy, i,
1298 gimple_omp_for_cond (stmt, i));
1303 case GIMPLE_OMP_MASTER:
1304 s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
1305 copy = gimple_build_omp_master (s1);
1308 case GIMPLE_OMP_ORDERED:
1309 s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
1310 copy = gimple_build_omp_ordered (s1);
1313 case GIMPLE_OMP_SECTION:
1314 s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
1315 copy = gimple_build_omp_section (s1);
1318 case GIMPLE_OMP_SECTIONS:
1319 s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
1320 copy = gimple_build_omp_sections
1321 (s1, gimple_omp_sections_clauses (stmt));
1324 case GIMPLE_OMP_SINGLE:
1325 s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
1326 copy = gimple_build_omp_single
1327 (s1, gimple_omp_single_clauses (stmt));
1330 case GIMPLE_OMP_CRITICAL:
1331 s1 = remap_gimple_seq (gimple_omp_body (stmt), id);
1333 = gimple_build_omp_critical (s1, gimple_omp_critical_name (stmt));
1342 if (gimple_assign_copy_p (stmt)
1343 && gimple_assign_lhs (stmt) == gimple_assign_rhs1 (stmt)
1344 && auto_var_in_fn_p (gimple_assign_lhs (stmt), id->src_fn))
1346 /* Here we handle statements that are not completely rewritten.
1347 First we detect some inlining-induced bogosities for
1350 /* Some assignments VAR = VAR; don't generate any rtl code
1351 and thus don't count as variable modification. Avoid
1352 keeping bogosities like 0 = 0. */
1353 tree decl = gimple_assign_lhs (stmt), value;
1356 n = (tree *) pointer_map_contains (id->decl_map, decl);
1360 STRIP_TYPE_NOPS (value);
1361 if (TREE_CONSTANT (value) || TREE_READONLY (value))
1362 return gimple_build_nop ();
1366 if (gimple_debug_bind_p (stmt))
1368 copy = gimple_build_debug_bind (gimple_debug_bind_get_var (stmt),
1369 gimple_debug_bind_get_value (stmt),
1371 VEC_safe_push (gimple, heap, id->debug_stmts, copy);
1375 /* Create a new deep copy of the statement. */
1376 copy = gimple_copy (stmt);
1378 /* Remap the region numbers for __builtin_eh_{pointer,filter},
1379 RESX and EH_DISPATCH. */
1381 switch (gimple_code (copy))
1385 tree r, fndecl = gimple_call_fndecl (copy);
1386 if (fndecl && DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_NORMAL)
1387 switch (DECL_FUNCTION_CODE (fndecl))
1389 case BUILT_IN_EH_COPY_VALUES:
1390 r = gimple_call_arg (copy, 1);
1391 r = remap_eh_region_tree_nr (r, id);
1392 gimple_call_set_arg (copy, 1, r);
1395 case BUILT_IN_EH_POINTER:
1396 case BUILT_IN_EH_FILTER:
1397 r = gimple_call_arg (copy, 0);
1398 r = remap_eh_region_tree_nr (r, id);
1399 gimple_call_set_arg (copy, 0, r);
1410 int r = gimple_resx_region (copy);
1411 r = remap_eh_region_nr (r, id);
1412 gimple_resx_set_region (copy, r);
1416 case GIMPLE_EH_DISPATCH:
1418 int r = gimple_eh_dispatch_region (copy);
1419 r = remap_eh_region_nr (r, id);
1420 gimple_eh_dispatch_set_region (copy, r);
1429 /* If STMT has a block defined, map it to the newly constructed
1430 block. When inlining we want statements without a block to
1431 appear in the block of the function call. */
1432 new_block = id->block;
1433 if (gimple_block (copy))
1436 n = (tree *) pointer_map_contains (id->decl_map, gimple_block (copy));
1441 gimple_set_block (copy, new_block);
1443 if (gimple_debug_bind_p (copy))
1446 /* Remap all the operands in COPY. */
1447 memset (&wi, 0, sizeof (wi));
1450 walk_tree (gimple_op_ptr (copy, 1), remap_gimple_op_r, &wi, NULL);
1452 walk_gimple_op (copy, remap_gimple_op_r, &wi);
1454 /* Clear the copied virtual operands. We are not remapping them here
1455 but are going to recreate them from scratch. */
1456 if (gimple_has_mem_ops (copy))
1458 gimple_set_vdef (copy, NULL_TREE);
1459 gimple_set_vuse (copy, NULL_TREE);
1466 /* Copy basic block, scale profile accordingly. Edges will be taken care of
1470 copy_bb (copy_body_data *id, basic_block bb, int frequency_scale,
1471 gcov_type count_scale)
1473 gimple_stmt_iterator gsi, copy_gsi, seq_gsi;
1474 basic_block copy_basic_block;
1478 /* create_basic_block() will append every new block to
1479 basic_block_info automatically. */
1480 copy_basic_block = create_basic_block (NULL, (void *) 0,
1481 (basic_block) bb->prev_bb->aux);
1482 copy_basic_block->count = bb->count * count_scale / REG_BR_PROB_BASE;
1484 /* We are going to rebuild frequencies from scratch. These values
1485 have just small importance to drive canonicalize_loop_headers. */
1486 freq = ((gcov_type)bb->frequency * frequency_scale / REG_BR_PROB_BASE);
1488 /* We recompute frequencies after inlining, so this is quite safe. */
1489 if (freq > BB_FREQ_MAX)
1491 copy_basic_block->frequency = freq;
1493 copy_gsi = gsi_start_bb (copy_basic_block);
1495 for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
1497 gimple stmt = gsi_stmt (gsi);
1498 gimple orig_stmt = stmt;
1500 id->regimplify = false;
1501 stmt = remap_gimple_stmt (stmt, id);
1502 if (gimple_nop_p (stmt))
1505 gimple_duplicate_stmt_histograms (cfun, stmt, id->src_cfun, orig_stmt);
1508 /* With return slot optimization we can end up with
1509 non-gimple (foo *)&this->m, fix that here. */
1510 if (is_gimple_assign (stmt)
1511 && gimple_assign_rhs_code (stmt) == NOP_EXPR
1512 && !is_gimple_val (gimple_assign_rhs1 (stmt)))
1515 new_rhs = force_gimple_operand_gsi (&seq_gsi,
1516 gimple_assign_rhs1 (stmt),
1517 true, NULL, false, GSI_NEW_STMT);
1518 gimple_assign_set_rhs1 (stmt, new_rhs);
1519 id->regimplify = false;
1522 gsi_insert_after (&seq_gsi, stmt, GSI_NEW_STMT);
1525 gimple_regimplify_operands (stmt, &seq_gsi);
1527 /* If copy_basic_block has been empty at the start of this iteration,
1528 call gsi_start_bb again to get at the newly added statements. */
1529 if (gsi_end_p (copy_gsi))
1530 copy_gsi = gsi_start_bb (copy_basic_block);
1532 gsi_next (©_gsi);
1534 /* Process the new statement. The call to gimple_regimplify_operands
1535 possibly turned the statement into multiple statements, we
1536 need to process all of them. */
1541 stmt = gsi_stmt (copy_gsi);
1542 if (is_gimple_call (stmt)
1543 && gimple_call_va_arg_pack_p (stmt)
1546 /* __builtin_va_arg_pack () should be replaced by
1547 all arguments corresponding to ... in the caller. */
1550 VEC(tree, heap) *argarray;
1551 size_t nargs = gimple_call_num_args (id->gimple_call);
1554 for (p = DECL_ARGUMENTS (id->src_fn); p; p = TREE_CHAIN (p))
1557 /* Create the new array of arguments. */
1558 n = nargs + gimple_call_num_args (stmt);
1559 argarray = VEC_alloc (tree, heap, n);
1560 VEC_safe_grow (tree, heap, argarray, n);
1562 /* Copy all the arguments before '...' */
1563 memcpy (VEC_address (tree, argarray),
1564 gimple_call_arg_ptr (stmt, 0),
1565 gimple_call_num_args (stmt) * sizeof (tree));
1567 /* Append the arguments passed in '...' */
1568 memcpy (VEC_address(tree, argarray) + gimple_call_num_args (stmt),
1569 gimple_call_arg_ptr (id->gimple_call, 0)
1570 + (gimple_call_num_args (id->gimple_call) - nargs),
1571 nargs * sizeof (tree));
1573 new_call = gimple_build_call_vec (gimple_call_fn (stmt),
1576 VEC_free (tree, heap, argarray);
1578 /* Copy all GIMPLE_CALL flags, location and block, except
1579 GF_CALL_VA_ARG_PACK. */
1580 gimple_call_copy_flags (new_call, stmt);
1581 gimple_call_set_va_arg_pack (new_call, false);
1582 gimple_set_location (new_call, gimple_location (stmt));
1583 gimple_set_block (new_call, gimple_block (stmt));
1584 gimple_call_set_lhs (new_call, gimple_call_lhs (stmt));
1586 gsi_replace (©_gsi, new_call, false);
1587 gimple_set_bb (stmt, NULL);
1590 else if (is_gimple_call (stmt)
1592 && (decl = gimple_call_fndecl (stmt))
1593 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL
1594 && DECL_FUNCTION_CODE (decl) == BUILT_IN_VA_ARG_PACK_LEN)
1596 /* __builtin_va_arg_pack_len () should be replaced by
1597 the number of anonymous arguments. */
1598 size_t nargs = gimple_call_num_args (id->gimple_call);
1602 for (p = DECL_ARGUMENTS (id->src_fn); p; p = TREE_CHAIN (p))
1605 count = build_int_cst (integer_type_node, nargs);
1606 new_stmt = gimple_build_assign (gimple_call_lhs (stmt), count);
1607 gsi_replace (©_gsi, new_stmt, false);
1611 /* Statements produced by inlining can be unfolded, especially
1612 when we constant propagated some operands. We can't fold
1613 them right now for two reasons:
1614 1) folding require SSA_NAME_DEF_STMTs to be correct
1615 2) we can't change function calls to builtins.
1616 So we just mark statement for later folding. We mark
1617 all new statements, instead just statements that has changed
1618 by some nontrivial substitution so even statements made
1619 foldable indirectly are updated. If this turns out to be
1620 expensive, copy_body can be told to watch for nontrivial
1622 if (id->statements_to_fold)
1623 pointer_set_insert (id->statements_to_fold, stmt);
1625 /* We're duplicating a CALL_EXPR. Find any corresponding
1626 callgraph edges and update or duplicate them. */
1627 if (is_gimple_call (stmt))
1629 struct cgraph_edge *edge;
1632 switch (id->transform_call_graph_edges)
1634 case CB_CGE_DUPLICATE:
1635 edge = cgraph_edge (id->src_node, orig_stmt);
1638 int edge_freq = edge->frequency;
1639 edge = cgraph_clone_edge (edge, id->dst_node, stmt,
1641 REG_BR_PROB_BASE, CGRAPH_FREQ_BASE,
1642 edge->frequency, true);
1643 /* We could also just rescale the frequency, but
1644 doing so would introduce roundoff errors and make
1645 verifier unhappy. */
1647 = compute_call_stmt_bb_frequency (id->dst_node->decl,
1650 && profile_status_for_function (cfun) != PROFILE_ABSENT
1651 && (edge_freq > edge->frequency + 10
1652 || edge_freq < edge->frequency - 10))
1654 fprintf (dump_file, "Edge frequency estimated by "
1655 "cgraph %i diverge from inliner's estimate %i\n",
1659 "Orig bb: %i, orig bb freq %i, new bb freq %i\n",
1662 copy_basic_block->frequency);
1667 case CB_CGE_MOVE_CLONES:
1668 cgraph_set_call_stmt_including_clones (id->dst_node,
1670 edge = cgraph_edge (id->dst_node, stmt);
1674 edge = cgraph_edge (id->dst_node, orig_stmt);
1676 cgraph_set_call_stmt (edge, stmt);
1683 /* Constant propagation on argument done during inlining
1684 may create new direct call. Produce an edge for it. */
1686 || (edge->indirect_call
1687 && id->transform_call_graph_edges == CB_CGE_MOVE_CLONES))
1688 && is_gimple_call (stmt)
1689 && (fn = gimple_call_fndecl (stmt)) != NULL)
1691 struct cgraph_node *dest = cgraph_node (fn);
1693 /* We have missing edge in the callgraph. This can happen
1694 when previous inlining turned an indirect call into a
1695 direct call by constant propagating arguments or we are
1696 producing dead clone (for further clonning). In all
1697 other cases we hit a bug (incorrect node sharing is the
1698 most common reason for missing edges). */
1699 gcc_assert (dest->needed || !dest->analyzed
1700 || !id->src_node->analyzed);
1701 if (id->transform_call_graph_edges == CB_CGE_MOVE_CLONES)
1702 cgraph_create_edge_including_clones
1703 (id->dst_node, dest, orig_stmt, stmt, bb->count,
1704 compute_call_stmt_bb_frequency (id->dst_node->decl,
1706 bb->loop_depth, CIF_ORIGINALLY_INDIRECT_CALL);
1708 cgraph_create_edge (id->dst_node, dest, stmt,
1710 compute_call_stmt_bb_frequency
1711 (id->dst_node->decl, copy_basic_block),
1712 bb->loop_depth)->inline_failed
1713 = CIF_ORIGINALLY_INDIRECT_CALL;
1716 fprintf (dump_file, "Created new direct edge to %s",
1717 cgraph_node_name (dest));
1721 flags = gimple_call_flags (stmt);
1722 if (flags & ECF_MAY_BE_ALLOCA)
1723 cfun->calls_alloca = true;
1724 if (flags & ECF_RETURNS_TWICE)
1725 cfun->calls_setjmp = true;
1728 maybe_duplicate_eh_stmt_fn (cfun, stmt, id->src_cfun, orig_stmt,
1729 id->eh_map, id->eh_lp_nr);
1731 if (gimple_in_ssa_p (cfun) && !is_gimple_debug (stmt))
1736 find_new_referenced_vars (gsi_stmt (copy_gsi));
1737 FOR_EACH_SSA_TREE_OPERAND (def, stmt, i, SSA_OP_DEF)
1738 if (TREE_CODE (def) == SSA_NAME)
1739 SSA_NAME_DEF_STMT (def) = stmt;
1742 gsi_next (©_gsi);
1744 while (!gsi_end_p (copy_gsi));
1746 copy_gsi = gsi_last_bb (copy_basic_block);
1749 return copy_basic_block;
1752 /* Inserting Single Entry Multiple Exit region in SSA form into code in SSA
1753 form is quite easy, since dominator relationship for old basic blocks does
1756 There is however exception where inlining might change dominator relation
1757 across EH edges from basic block within inlined functions destinating
1758 to landing pads in function we inline into.
1760 The function fills in PHI_RESULTs of such PHI nodes if they refer
1761 to gimple regs. Otherwise, the function mark PHI_RESULT of such
1762 PHI nodes for renaming. For non-gimple regs, renaming is safe: the
1763 EH edges are abnormal and SSA_NAME_OCCURS_IN_ABNORMAL_PHI must be
1764 set, and this means that there will be no overlapping live ranges
1765 for the underlying symbol.
1767 This might change in future if we allow redirecting of EH edges and
1768 we might want to change way build CFG pre-inlining to include
1769 all the possible edges then. */
1771 update_ssa_across_abnormal_edges (basic_block bb, basic_block ret_bb,
1772 bool can_throw, bool nonlocal_goto)
1777 FOR_EACH_EDGE (e, ei, bb->succs)
1779 || ((basic_block)e->dest->aux)->index == ENTRY_BLOCK)
1782 gimple_stmt_iterator si;
1785 gcc_assert (e->flags & EDGE_EH);
1788 gcc_assert (!(e->flags & EDGE_EH));
1790 for (si = gsi_start_phis (e->dest); !gsi_end_p (si); gsi_next (&si))
1794 phi = gsi_stmt (si);
1796 /* There shouldn't be any PHI nodes in the ENTRY_BLOCK. */
1797 gcc_assert (!e->dest->aux);
1799 gcc_assert ((e->flags & EDGE_EH)
1800 || SSA_NAME_OCCURS_IN_ABNORMAL_PHI (PHI_RESULT (phi)));
1802 if (!is_gimple_reg (PHI_RESULT (phi)))
1804 mark_sym_for_renaming (SSA_NAME_VAR (PHI_RESULT (phi)));
1808 re = find_edge (ret_bb, e->dest);
1810 gcc_assert ((re->flags & (EDGE_EH | EDGE_ABNORMAL))
1811 == (e->flags & (EDGE_EH | EDGE_ABNORMAL)));
1813 SET_USE (PHI_ARG_DEF_PTR_FROM_EDGE (phi, e),
1814 USE_FROM_PTR (PHI_ARG_DEF_PTR_FROM_EDGE (phi, re)));
1820 /* Copy edges from BB into its copy constructed earlier, scale profile
1821 accordingly. Edges will be taken care of later. Assume aux
1822 pointers to point to the copies of each BB. */
1825 copy_edges_for_bb (basic_block bb, gcov_type count_scale, basic_block ret_bb)
1827 basic_block new_bb = (basic_block) bb->aux;
1830 gimple_stmt_iterator si;
1833 /* Use the indices from the original blocks to create edges for the
1835 FOR_EACH_EDGE (old_edge, ei, bb->succs)
1836 if (!(old_edge->flags & EDGE_EH))
1840 flags = old_edge->flags;
1842 /* Return edges do get a FALLTHRU flag when the get inlined. */
1843 if (old_edge->dest->index == EXIT_BLOCK && !old_edge->flags
1844 && old_edge->dest->aux != EXIT_BLOCK_PTR)
1845 flags |= EDGE_FALLTHRU;
1846 new_edge = make_edge (new_bb, (basic_block) old_edge->dest->aux, flags);
1847 new_edge->count = old_edge->count * count_scale / REG_BR_PROB_BASE;
1848 new_edge->probability = old_edge->probability;
1851 if (bb->index == ENTRY_BLOCK || bb->index == EXIT_BLOCK)
1854 for (si = gsi_start_bb (new_bb); !gsi_end_p (si);)
1857 bool can_throw, nonlocal_goto;
1859 copy_stmt = gsi_stmt (si);
1860 if (!is_gimple_debug (copy_stmt))
1862 update_stmt (copy_stmt);
1863 if (gimple_in_ssa_p (cfun))
1864 mark_symbols_for_renaming (copy_stmt);
1867 /* Do this before the possible split_block. */
1870 /* If this tree could throw an exception, there are two
1871 cases where we need to add abnormal edge(s): the
1872 tree wasn't in a region and there is a "current
1873 region" in the caller; or the original tree had
1874 EH edges. In both cases split the block after the tree,
1875 and add abnormal edge(s) as needed; we need both
1876 those from the callee and the caller.
1877 We check whether the copy can throw, because the const
1878 propagation can change an INDIRECT_REF which throws
1879 into a COMPONENT_REF which doesn't. If the copy
1880 can throw, the original could also throw. */
1881 can_throw = stmt_can_throw_internal (copy_stmt);
1882 nonlocal_goto = stmt_can_make_abnormal_goto (copy_stmt);
1884 if (can_throw || nonlocal_goto)
1886 if (!gsi_end_p (si))
1887 /* Note that bb's predecessor edges aren't necessarily
1888 right at this point; split_block doesn't care. */
1890 edge e = split_block (new_bb, copy_stmt);
1893 new_bb->aux = e->src->aux;
1894 si = gsi_start_bb (new_bb);
1898 if (gimple_code (copy_stmt) == GIMPLE_EH_DISPATCH)
1899 make_eh_dispatch_edges (copy_stmt);
1901 make_eh_edges (copy_stmt);
1904 make_abnormal_goto_edges (gimple_bb (copy_stmt), true);
1906 if ((can_throw || nonlocal_goto)
1907 && gimple_in_ssa_p (cfun))
1908 update_ssa_across_abnormal_edges (gimple_bb (copy_stmt), ret_bb,
1909 can_throw, nonlocal_goto);
1913 /* Copy the PHIs. All blocks and edges are copied, some blocks
1914 was possibly split and new outgoing EH edges inserted.
1915 BB points to the block of original function and AUX pointers links
1916 the original and newly copied blocks. */
1919 copy_phis_for_bb (basic_block bb, copy_body_data *id)
1921 basic_block const new_bb = (basic_block) bb->aux;
1924 gimple_stmt_iterator si;
1926 for (si = gsi_start (phi_nodes (bb)); !gsi_end_p (si); gsi_next (&si))
1932 phi = gsi_stmt (si);
1933 res = PHI_RESULT (phi);
1935 if (is_gimple_reg (res))
1937 walk_tree (&new_res, copy_tree_body_r, id, NULL);
1938 SSA_NAME_DEF_STMT (new_res)
1939 = new_phi = create_phi_node (new_res, new_bb);
1940 FOR_EACH_EDGE (new_edge, ei, new_bb->preds)
1943 = find_edge ((basic_block) new_edge->src->aux, bb);
1944 tree arg = PHI_ARG_DEF_FROM_EDGE (phi, old_edge);
1946 tree block = id->block;
1947 id->block = NULL_TREE;
1948 walk_tree (&new_arg, copy_tree_body_r, id, NULL);
1950 gcc_assert (new_arg);
1951 /* With return slot optimization we can end up with
1952 non-gimple (foo *)&this->m, fix that here. */
1953 if (TREE_CODE (new_arg) != SSA_NAME
1954 && TREE_CODE (new_arg) != FUNCTION_DECL
1955 && !is_gimple_val (new_arg))
1957 gimple_seq stmts = NULL;
1958 new_arg = force_gimple_operand (new_arg, &stmts, true, NULL);
1959 gsi_insert_seq_on_edge_immediate (new_edge, stmts);
1961 add_phi_arg (new_phi, new_arg, new_edge,
1962 gimple_phi_arg_location_from_edge (phi, old_edge));
1969 /* Wrapper for remap_decl so it can be used as a callback. */
1972 remap_decl_1 (tree decl, void *data)
1974 return remap_decl (decl, (copy_body_data *) data);
1977 /* Build struct function and associated datastructures for the new clone
1978 NEW_FNDECL to be build. CALLEE_FNDECL is the original */
1981 initialize_cfun (tree new_fndecl, tree callee_fndecl, gcov_type count)
1983 struct function *src_cfun = DECL_STRUCT_FUNCTION (callee_fndecl);
1984 gcov_type count_scale;
1986 if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count)
1987 count_scale = (REG_BR_PROB_BASE * count
1988 / ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count);
1990 count_scale = REG_BR_PROB_BASE;
1992 /* Register specific tree functions. */
1993 gimple_register_cfg_hooks ();
1995 /* Get clean struct function. */
1996 push_struct_function (new_fndecl);
1998 /* We will rebuild these, so just sanity check that they are empty. */
1999 gcc_assert (VALUE_HISTOGRAMS (cfun) == NULL);
2000 gcc_assert (cfun->local_decls == NULL);
2001 gcc_assert (cfun->cfg == NULL);
2002 gcc_assert (cfun->decl == new_fndecl);
2004 /* Copy items we preserve during clonning. */
2005 cfun->static_chain_decl = src_cfun->static_chain_decl;
2006 cfun->nonlocal_goto_save_area = src_cfun->nonlocal_goto_save_area;
2007 cfun->function_end_locus = src_cfun->function_end_locus;
2008 cfun->curr_properties = src_cfun->curr_properties;
2009 cfun->last_verified = src_cfun->last_verified;
2010 cfun->va_list_gpr_size = src_cfun->va_list_gpr_size;
2011 cfun->va_list_fpr_size = src_cfun->va_list_fpr_size;
2012 cfun->function_frequency = src_cfun->function_frequency;
2013 cfun->has_nonlocal_label = src_cfun->has_nonlocal_label;
2014 cfun->stdarg = src_cfun->stdarg;
2015 cfun->dont_save_pending_sizes_p = src_cfun->dont_save_pending_sizes_p;
2016 cfun->after_inlining = src_cfun->after_inlining;
2017 cfun->returns_struct = src_cfun->returns_struct;
2018 cfun->returns_pcc_struct = src_cfun->returns_pcc_struct;
2019 cfun->after_tree_profile = src_cfun->after_tree_profile;
2021 init_empty_tree_cfg ();
2023 profile_status_for_function (cfun) = profile_status_for_function (src_cfun);
2024 ENTRY_BLOCK_PTR->count =
2025 (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count * count_scale /
2027 ENTRY_BLOCK_PTR->frequency
2028 = ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency;
2029 EXIT_BLOCK_PTR->count =
2030 (EXIT_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count * count_scale /
2032 EXIT_BLOCK_PTR->frequency =
2033 EXIT_BLOCK_PTR_FOR_FUNCTION (src_cfun)->frequency;
2035 init_eh_for_function ();
2037 if (src_cfun->gimple_df)
2039 init_tree_ssa (cfun);
2040 cfun->gimple_df->in_ssa_p = true;
2041 init_ssa_operands ();
2046 /* Make a copy of the body of FN so that it can be inserted inline in
2047 another function. Walks FN via CFG, returns new fndecl. */
2050 copy_cfg_body (copy_body_data * id, gcov_type count, int frequency_scale,
2051 basic_block entry_block_map, basic_block exit_block_map)
2053 tree callee_fndecl = id->src_fn;
2054 /* Original cfun for the callee, doesn't change. */
2055 struct function *src_cfun = DECL_STRUCT_FUNCTION (callee_fndecl);
2056 struct function *cfun_to_copy;
2058 tree new_fndecl = NULL;
2059 gcov_type count_scale;
2062 if (ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count)
2063 count_scale = (REG_BR_PROB_BASE * count
2064 / ENTRY_BLOCK_PTR_FOR_FUNCTION (src_cfun)->count);
2066 count_scale = REG_BR_PROB_BASE;
2068 /* Register specific tree functions. */
2069 gimple_register_cfg_hooks ();
2071 /* Must have a CFG here at this point. */
2072 gcc_assert (ENTRY_BLOCK_PTR_FOR_FUNCTION
2073 (DECL_STRUCT_FUNCTION (callee_fndecl)));
2075 cfun_to_copy = id->src_cfun = DECL_STRUCT_FUNCTION (callee_fndecl);
2077 ENTRY_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy)->aux = entry_block_map;
2078 EXIT_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy)->aux = exit_block_map;
2079 entry_block_map->aux = ENTRY_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy);
2080 exit_block_map->aux = EXIT_BLOCK_PTR_FOR_FUNCTION (cfun_to_copy);
2082 /* Duplicate any exception-handling regions. */
2084 id->eh_map = duplicate_eh_regions (cfun_to_copy, NULL, id->eh_lp_nr,
2087 /* Use aux pointers to map the original blocks to copy. */
2088 FOR_EACH_BB_FN (bb, cfun_to_copy)
2090 basic_block new_bb = copy_bb (id, bb, frequency_scale, count_scale);
2095 last = last_basic_block;
2097 /* Now that we've duplicated the blocks, duplicate their edges. */
2098 FOR_ALL_BB_FN (bb, cfun_to_copy)
2099 copy_edges_for_bb (bb, count_scale, exit_block_map);
2101 if (gimple_in_ssa_p (cfun))
2102 FOR_ALL_BB_FN (bb, cfun_to_copy)
2103 copy_phis_for_bb (bb, id);
2105 FOR_ALL_BB_FN (bb, cfun_to_copy)
2107 ((basic_block)bb->aux)->aux = NULL;
2111 /* Zero out AUX fields of newly created block during EH edge
2113 for (; last < last_basic_block; last++)
2114 BASIC_BLOCK (last)->aux = NULL;
2115 entry_block_map->aux = NULL;
2116 exit_block_map->aux = NULL;
2120 pointer_map_destroy (id->eh_map);
2127 /* Copy the debug STMT using ID. We deal with these statements in a
2128 special way: if any variable in their VALUE expression wasn't
2129 remapped yet, we won't remap it, because that would get decl uids
2130 out of sync, causing codegen differences between -g and -g0. If
2131 this arises, we drop the VALUE expression altogether. */
2134 copy_debug_stmt (gimple stmt, copy_body_data *id)
2137 struct walk_stmt_info wi;
2140 if (gimple_block (stmt))
2143 n = (tree *) pointer_map_contains (id->decl_map, gimple_block (stmt));
2147 gimple_set_block (stmt, t);
2149 /* Remap all the operands in COPY. */
2150 memset (&wi, 0, sizeof (wi));
2153 processing_debug_stmt = 1;
2155 t = gimple_debug_bind_get_var (stmt);
2157 if (TREE_CODE (t) == PARM_DECL && id->debug_map
2158 && (n = (tree *) pointer_map_contains (id->debug_map, t)))
2160 gcc_assert (TREE_CODE (*n) == VAR_DECL);
2163 else if (TREE_CODE (t) == VAR_DECL
2165 && gimple_in_ssa_p (cfun)
2166 && !pointer_map_contains (id->decl_map, t)
2168 /* T is a non-localized variable. */;
2170 walk_tree (&t, remap_gimple_op_r, &wi, NULL);
2172 gimple_debug_bind_set_var (stmt, t);
2174 if (gimple_debug_bind_has_value_p (stmt))
2175 walk_tree (gimple_debug_bind_get_value_ptr (stmt),
2176 remap_gimple_op_r, &wi, NULL);
2178 /* Punt if any decl couldn't be remapped. */
2179 if (processing_debug_stmt < 0)
2180 gimple_debug_bind_reset_value (stmt);
2182 processing_debug_stmt = 0;
2185 if (gimple_in_ssa_p (cfun))
2186 mark_symbols_for_renaming (stmt);
2189 /* Process deferred debug stmts. In order to give values better odds
2190 of being successfully remapped, we delay the processing of debug
2191 stmts until all other stmts that might require remapping are
2195 copy_debug_stmts (copy_body_data *id)
2200 if (!id->debug_stmts)
2203 for (i = 0; VEC_iterate (gimple, id->debug_stmts, i, stmt); i++)
2204 copy_debug_stmt (stmt, id);
2206 VEC_free (gimple, heap, id->debug_stmts);
2209 /* Make a copy of the body of SRC_FN so that it can be inserted inline in
2210 another function. */
2213 copy_tree_body (copy_body_data *id)
2215 tree fndecl = id->src_fn;
2216 tree body = DECL_SAVED_TREE (fndecl);
2218 walk_tree (&body, copy_tree_body_r, id, NULL);
2223 /* Make a copy of the body of FN so that it can be inserted inline in
2224 another function. */
2227 copy_body (copy_body_data *id, gcov_type count, int frequency_scale,
2228 basic_block entry_block_map, basic_block exit_block_map)
2230 tree fndecl = id->src_fn;
2233 /* If this body has a CFG, walk CFG and copy. */
2234 gcc_assert (ENTRY_BLOCK_PTR_FOR_FUNCTION (DECL_STRUCT_FUNCTION (fndecl)));
2235 body = copy_cfg_body (id, count, frequency_scale, entry_block_map, exit_block_map);
2236 copy_debug_stmts (id);
2241 /* Return true if VALUE is an ADDR_EXPR of an automatic variable
2242 defined in function FN, or of a data member thereof. */
2245 self_inlining_addr_expr (tree value, tree fn)
2249 if (TREE_CODE (value) != ADDR_EXPR)
2252 var = get_base_address (TREE_OPERAND (value, 0));
2254 return var && auto_var_in_fn_p (var, fn);
2257 /* Append to BB a debug annotation that binds VAR to VALUE, inheriting
2258 lexical block and line number information from base_stmt, if given,
2259 or from the last stmt of the block otherwise. */
2262 insert_init_debug_bind (copy_body_data *id,
2263 basic_block bb, tree var, tree value,
2267 gimple_stmt_iterator gsi;
2270 if (!gimple_in_ssa_p (id->src_cfun))
2273 if (!MAY_HAVE_DEBUG_STMTS)
2276 tracked_var = target_for_debug_bind (var);
2282 gsi = gsi_last_bb (bb);
2283 if (!base_stmt && !gsi_end_p (gsi))
2284 base_stmt = gsi_stmt (gsi);
2287 note = gimple_build_debug_bind (tracked_var, value, base_stmt);
2291 if (!gsi_end_p (gsi))
2292 gsi_insert_after (&gsi, note, GSI_SAME_STMT);
2294 gsi_insert_before (&gsi, note, GSI_SAME_STMT);
2301 insert_init_stmt (copy_body_data *id, basic_block bb, gimple init_stmt)
2303 /* If VAR represents a zero-sized variable, it's possible that the
2304 assignment statement may result in no gimple statements. */
2307 gimple_stmt_iterator si = gsi_last_bb (bb);
2309 /* We can end up with init statements that store to a non-register
2310 from a rhs with a conversion. Handle that here by forcing the
2311 rhs into a temporary. gimple_regimplify_operands is not
2312 prepared to do this for us. */
2313 if (!is_gimple_debug (init_stmt)
2314 && !is_gimple_reg (gimple_assign_lhs (init_stmt))
2315 && is_gimple_reg_type (TREE_TYPE (gimple_assign_lhs (init_stmt)))
2316 && gimple_assign_rhs_class (init_stmt) == GIMPLE_UNARY_RHS)
2318 tree rhs = build1 (gimple_assign_rhs_code (init_stmt),
2319 gimple_expr_type (init_stmt),
2320 gimple_assign_rhs1 (init_stmt));
2321 rhs = force_gimple_operand_gsi (&si, rhs, true, NULL_TREE, false,
2323 gimple_assign_set_rhs_code (init_stmt, TREE_CODE (rhs));
2324 gimple_assign_set_rhs1 (init_stmt, rhs);
2326 gsi_insert_after (&si, init_stmt, GSI_NEW_STMT);
2327 gimple_regimplify_operands (init_stmt, &si);
2328 mark_symbols_for_renaming (init_stmt);
2330 if (!is_gimple_debug (init_stmt) && MAY_HAVE_DEBUG_STMTS)
2332 tree var, def = gimple_assign_lhs (init_stmt);
2334 if (TREE_CODE (def) == SSA_NAME)
2335 var = SSA_NAME_VAR (def);
2339 insert_init_debug_bind (id, bb, var, def, init_stmt);
2344 /* Initialize parameter P with VALUE. If needed, produce init statement
2345 at the end of BB. When BB is NULL, we return init statement to be
2348 setup_one_parameter (copy_body_data *id, tree p, tree value, tree fn,
2349 basic_block bb, tree *vars)
2351 gimple init_stmt = NULL;
2354 tree def = (gimple_in_ssa_p (cfun)
2355 ? gimple_default_def (id->src_cfun, p) : NULL);
2358 && value != error_mark_node
2359 && !useless_type_conversion_p (TREE_TYPE (p), TREE_TYPE (value)))
2361 if (fold_convertible_p (TREE_TYPE (p), value))
2362 rhs = fold_build1 (NOP_EXPR, TREE_TYPE (p), value);
2364 /* ??? For valid (GIMPLE) programs we should not end up here.
2365 Still if something has gone wrong and we end up with truly
2366 mismatched types here, fall back to using a VIEW_CONVERT_EXPR
2367 to not leak invalid GIMPLE to the following passes. */
2368 rhs = fold_build1 (VIEW_CONVERT_EXPR, TREE_TYPE (p), value);
2371 /* Make an equivalent VAR_DECL. Note that we must NOT remap the type
2372 here since the type of this decl must be visible to the calling
2374 var = copy_decl_to_var (p, id);
2376 /* We're actually using the newly-created var. */
2377 if (gimple_in_ssa_p (cfun) && TREE_CODE (var) == VAR_DECL)
2380 add_referenced_var (var);
2383 /* Declare this new variable. */
2384 TREE_CHAIN (var) = *vars;
2387 /* Make gimplifier happy about this variable. */
2388 DECL_SEEN_IN_BIND_EXPR_P (var) = 1;
2390 /* If the parameter is never assigned to, has no SSA_NAMEs created,
2391 we would not need to create a new variable here at all, if it
2392 weren't for debug info. Still, we can just use the argument
2394 if (TREE_READONLY (p)
2395 && !TREE_ADDRESSABLE (p)
2396 && value && !TREE_SIDE_EFFECTS (value)
2399 /* We may produce non-gimple trees by adding NOPs or introduce
2400 invalid sharing when operand is not really constant.
2401 It is not big deal to prohibit constant propagation here as
2402 we will constant propagate in DOM1 pass anyway. */
2403 if (is_gimple_min_invariant (value)
2404 && useless_type_conversion_p (TREE_TYPE (p),
2406 /* We have to be very careful about ADDR_EXPR. Make sure
2407 the base variable isn't a local variable of the inlined
2408 function, e.g., when doing recursive inlining, direct or
2409 mutually-recursive or whatever, which is why we don't
2410 just test whether fn == current_function_decl. */
2411 && ! self_inlining_addr_expr (value, fn))
2413 insert_decl_map (id, p, value);
2414 insert_debug_decl_map (id, p, var);
2415 return insert_init_debug_bind (id, bb, var, value, NULL);
2419 /* Register the VAR_DECL as the equivalent for the PARM_DECL;
2420 that way, when the PARM_DECL is encountered, it will be
2421 automatically replaced by the VAR_DECL. */
2422 insert_decl_map (id, p, var);
2424 /* Even if P was TREE_READONLY, the new VAR should not be.
2425 In the original code, we would have constructed a
2426 temporary, and then the function body would have never
2427 changed the value of P. However, now, we will be
2428 constructing VAR directly. The constructor body may
2429 change its value multiple times as it is being
2430 constructed. Therefore, it must not be TREE_READONLY;
2431 the back-end assumes that TREE_READONLY variable is
2432 assigned to only once. */
2433 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (p)))
2434 TREE_READONLY (var) = 0;
2436 /* If there is no setup required and we are in SSA, take the easy route
2437 replacing all SSA names representing the function parameter by the
2438 SSA name passed to function.
2440 We need to construct map for the variable anyway as it might be used
2441 in different SSA names when parameter is set in function.
2443 Do replacement at -O0 for const arguments replaced by constant.
2444 This is important for builtin_constant_p and other construct requiring
2445 constant argument to be visible in inlined function body. */
2446 if (gimple_in_ssa_p (cfun) && rhs && def && is_gimple_reg (p)
2448 || (TREE_READONLY (p)
2449 && is_gimple_min_invariant (rhs)))
2450 && (TREE_CODE (rhs) == SSA_NAME
2451 || is_gimple_min_invariant (rhs))
2452 && !SSA_NAME_OCCURS_IN_ABNORMAL_PHI (def))
2454 insert_decl_map (id, def, rhs);
2455 return insert_init_debug_bind (id, bb, var, rhs, NULL);
2458 /* If the value of argument is never used, don't care about initializing
2460 if (optimize && gimple_in_ssa_p (cfun) && !def && is_gimple_reg (p))
2462 gcc_assert (!value || !TREE_SIDE_EFFECTS (value));
2463 return insert_init_debug_bind (id, bb, var, rhs, NULL);
2466 /* Initialize this VAR_DECL from the equivalent argument. Convert
2467 the argument to the proper type in case it was promoted. */
2470 if (rhs == error_mark_node)
2472 insert_decl_map (id, p, var);
2473 return insert_init_debug_bind (id, bb, var, rhs, NULL);
2476 STRIP_USELESS_TYPE_CONVERSION (rhs);
2478 /* We want to use MODIFY_EXPR, not INIT_EXPR here so that we
2479 keep our trees in gimple form. */
2480 if (def && gimple_in_ssa_p (cfun) && is_gimple_reg (p))
2482 def = remap_ssa_name (def, id);
2483 init_stmt = gimple_build_assign (def, rhs);
2484 SSA_NAME_IS_DEFAULT_DEF (def) = 0;
2485 set_default_def (var, NULL);
2488 init_stmt = gimple_build_assign (var, rhs);
2490 if (bb && init_stmt)
2491 insert_init_stmt (id, bb, init_stmt);
2496 /* Generate code to initialize the parameters of the function at the
2497 top of the stack in ID from the GIMPLE_CALL STMT. */
2500 initialize_inlined_parameters (copy_body_data *id, gimple stmt,
2501 tree fn, basic_block bb)
2506 tree vars = NULL_TREE;
2507 tree static_chain = gimple_call_chain (stmt);
2509 /* Figure out what the parameters are. */
2510 parms = DECL_ARGUMENTS (fn);
2512 /* Loop through the parameter declarations, replacing each with an
2513 equivalent VAR_DECL, appropriately initialized. */
2514 for (p = parms, i = 0; p; p = TREE_CHAIN (p), i++)
2517 val = i < gimple_call_num_args (stmt) ? gimple_call_arg (stmt, i) : NULL;
2518 setup_one_parameter (id, p, val, fn, bb, &vars);
2521 /* Initialize the static chain. */
2522 p = DECL_STRUCT_FUNCTION (fn)->static_chain_decl;
2523 gcc_assert (fn != current_function_decl);
2526 /* No static chain? Seems like a bug in tree-nested.c. */
2527 gcc_assert (static_chain);
2529 setup_one_parameter (id, p, static_chain, fn, bb, &vars);
2532 declare_inline_vars (id->block, vars);
2536 /* Declare a return variable to replace the RESULT_DECL for the
2537 function we are calling. An appropriate DECL_STMT is returned.
2538 The USE_STMT is filled to contain a use of the declaration to
2539 indicate the return value of the function.
2541 RETURN_SLOT, if non-null is place where to store the result. It
2542 is set only for CALL_EXPR_RETURN_SLOT_OPT. MODIFY_DEST, if non-null,
2543 was the LHS of the MODIFY_EXPR to which this call is the RHS.
2545 The return value is a (possibly null) value that holds the result
2546 as seen by the caller. */
2549 declare_return_variable (copy_body_data *id, tree return_slot, tree modify_dest)
2551 tree callee = id->src_fn;
2552 tree caller = id->dst_fn;
2553 tree result = DECL_RESULT (callee);
2554 tree callee_type = TREE_TYPE (result);
2555 tree caller_type = TREE_TYPE (TREE_TYPE (callee));
2558 /* We don't need to do anything for functions that don't return
2560 if (!result || VOID_TYPE_P (callee_type))
2563 /* If there was a return slot, then the return value is the
2564 dereferenced address of that object. */
2567 /* The front end shouldn't have used both return_slot and
2568 a modify expression. */
2569 gcc_assert (!modify_dest);
2570 if (DECL_BY_REFERENCE (result))
2572 tree return_slot_addr = build_fold_addr_expr (return_slot);
2573 STRIP_USELESS_TYPE_CONVERSION (return_slot_addr);
2575 /* We are going to construct *&return_slot and we can't do that
2576 for variables believed to be not addressable.
2578 FIXME: This check possibly can match, because values returned
2579 via return slot optimization are not believed to have address
2580 taken by alias analysis. */
2581 gcc_assert (TREE_CODE (return_slot) != SSA_NAME);
2582 if (gimple_in_ssa_p (cfun))
2584 HOST_WIDE_INT bitsize;
2585 HOST_WIDE_INT bitpos;
2587 enum machine_mode mode;
2591 base = get_inner_reference (return_slot, &bitsize, &bitpos,
2593 &mode, &unsignedp, &volatilep,
2595 if (TREE_CODE (base) == INDIRECT_REF)
2596 base = TREE_OPERAND (base, 0);
2597 if (TREE_CODE (base) == SSA_NAME)
2598 base = SSA_NAME_VAR (base);
2599 mark_sym_for_renaming (base);
2601 var = return_slot_addr;
2606 gcc_assert (TREE_CODE (var) != SSA_NAME);
2607 TREE_ADDRESSABLE (var) |= TREE_ADDRESSABLE (result);
2609 if ((TREE_CODE (TREE_TYPE (result)) == COMPLEX_TYPE
2610 || TREE_CODE (TREE_TYPE (result)) == VECTOR_TYPE)
2611 && !DECL_GIMPLE_REG_P (result)
2613 DECL_GIMPLE_REG_P (var) = 0;
2618 /* All types requiring non-trivial constructors should have been handled. */
2619 gcc_assert (!TREE_ADDRESSABLE (callee_type));
2621 /* Attempt to avoid creating a new temporary variable. */
2623 && TREE_CODE (modify_dest) != SSA_NAME)
2625 bool use_it = false;
2627 /* We can't use MODIFY_DEST if there's type promotion involved. */
2628 if (!useless_type_conversion_p (callee_type, caller_type))
2631 /* ??? If we're assigning to a variable sized type, then we must
2632 reuse the destination variable, because we've no good way to
2633 create variable sized temporaries at this point. */
2634 else if (TREE_CODE (TYPE_SIZE_UNIT (caller_type)) != INTEGER_CST)
2637 /* If the callee cannot possibly modify MODIFY_DEST, then we can
2638 reuse it as the result of the call directly. Don't do this if
2639 it would promote MODIFY_DEST to addressable. */
2640 else if (TREE_ADDRESSABLE (result))
2644 tree base_m = get_base_address (modify_dest);
2646 /* If the base isn't a decl, then it's a pointer, and we don't
2647 know where that's going to go. */
2648 if (!DECL_P (base_m))
2650 else if (is_global_var (base_m))
2652 else if ((TREE_CODE (TREE_TYPE (result)) == COMPLEX_TYPE
2653 || TREE_CODE (TREE_TYPE (result)) == VECTOR_TYPE)
2654 && !DECL_GIMPLE_REG_P (result)
2655 && DECL_GIMPLE_REG_P (base_m))
2657 else if (!TREE_ADDRESSABLE (base_m))
2669 gcc_assert (TREE_CODE (TYPE_SIZE_UNIT (callee_type)) == INTEGER_CST);
2671 var = copy_result_decl_to_var (result, id);
2672 if (gimple_in_ssa_p (cfun))
2675 add_referenced_var (var);
2678 DECL_SEEN_IN_BIND_EXPR_P (var) = 1;
2679 DECL_STRUCT_FUNCTION (caller)->local_decls
2680 = tree_cons (NULL_TREE, var,
2681 DECL_STRUCT_FUNCTION (caller)->local_decls);
2683 /* Do not have the rest of GCC warn about this variable as it should
2684 not be visible to the user. */
2685 TREE_NO_WARNING (var) = 1;
2687 declare_inline_vars (id->block, var);
2689 /* Build the use expr. If the return type of the function was
2690 promoted, convert it back to the expected type. */
2692 if (!useless_type_conversion_p (caller_type, TREE_TYPE (var)))
2693 use = fold_convert (caller_type, var);
2695 STRIP_USELESS_TYPE_CONVERSION (use);
2697 if (DECL_BY_REFERENCE (result))
2699 TREE_ADDRESSABLE (var) = 1;
2700 var = build_fold_addr_expr (var);
2704 /* Register the VAR_DECL as the equivalent for the RESULT_DECL; that
2705 way, when the RESULT_DECL is encountered, it will be
2706 automatically replaced by the VAR_DECL. */
2707 insert_decl_map (id, result, var);
2709 /* Remember this so we can ignore it in remap_decls. */
2715 /* Callback through walk_tree. Determine if a DECL_INITIAL makes reference
2716 to a local label. */
2719 has_label_address_in_static_1 (tree *nodep, int *walk_subtrees, void *fnp)
2722 tree fn = (tree) fnp;
2724 if (TREE_CODE (node) == LABEL_DECL && DECL_CONTEXT (node) == fn)
2733 /* Callback through walk_tree. Determine if we've got an aggregate
2734 type that we can't support; return non-null if so. */
2737 cannot_copy_type_1 (tree *nodep, int *walk_subtrees ATTRIBUTE_UNUSED,
2738 void *data ATTRIBUTE_UNUSED)
2740 tree t, node = *nodep;
2742 if (TREE_CODE (node) == RECORD_TYPE || TREE_CODE (node) == UNION_TYPE)
2744 /* We cannot inline a function of the form
2746 void F (int i) { struct S { int ar[i]; } s; }
2748 Attempting to do so produces a catch-22.
2749 If walk_tree examines the TYPE_FIELDS chain of RECORD_TYPE/
2750 UNION_TYPE nodes, then it goes into infinite recursion on a
2751 structure containing a pointer to its own type. If it doesn't,
2752 then the type node for S doesn't get adjusted properly when
2755 ??? This is likely no longer true, but it's too late in the 4.0
2756 cycle to try to find out. This should be checked for 4.1. */
2757 for (t = TYPE_FIELDS (node); t; t = TREE_CHAIN (t))
2758 if (variably_modified_type_p (TREE_TYPE (t), NULL))
2766 /* Determine if the function can be copied. If so return NULL. If
2767 not return a string describng the reason for failure. */
2770 copy_forbidden (struct function *fun, tree fndecl)
2772 const char *reason = fun->cannot_be_copied_reason;
2775 /* Only examine the function once. */
2776 if (fun->cannot_be_copied_set)
2779 /* We cannot copy a function that receives a non-local goto
2780 because we cannot remap the destination label used in the
2781 function that is performing the non-local goto. */
2782 /* ??? Actually, this should be possible, if we work at it.
2783 No doubt there's just a handful of places that simply
2784 assume it doesn't happen and don't substitute properly. */
2785 if (fun->has_nonlocal_label)
2787 reason = G_("function %q+F can never be copied "
2788 "because it receives a non-local goto");
2792 for (step = fun->local_decls; step; step = TREE_CHAIN (step))
2794 tree decl = TREE_VALUE (step);
2796 if (TREE_CODE (decl) == VAR_DECL
2797 && TREE_STATIC (decl)
2798 && !DECL_EXTERNAL (decl)
2799 && DECL_INITIAL (decl)
2800 && walk_tree_without_duplicates (&DECL_INITIAL (decl),
2801 has_label_address_in_static_1,
2804 reason = G_("function %q+F can never be copied because it saves "
2805 "address of local label in a static variable");
2809 if (!TREE_STATIC (decl) && !DECL_EXTERNAL (decl)
2810 && variably_modified_type_p (TREE_TYPE (decl), NULL)
2811 && walk_tree_without_duplicates (&TREE_TYPE (decl),
2812 cannot_copy_type_1, NULL))
2814 reason = G_("function %q+F can never be copied "
2815 "because it uses variable sized variables");
2821 fun->cannot_be_copied_reason = reason;
2822 fun->cannot_be_copied_set = true;
2827 static const char *inline_forbidden_reason;
2829 /* A callback for walk_gimple_seq to handle statements. Returns non-null
2830 iff a function can not be inlined. Also sets the reason why. */
2833 inline_forbidden_p_stmt (gimple_stmt_iterator *gsi, bool *handled_ops_p,
2834 struct walk_stmt_info *wip)
2836 tree fn = (tree) wip->info;
2838 gimple stmt = gsi_stmt (*gsi);
2840 switch (gimple_code (stmt))
2843 /* Refuse to inline alloca call unless user explicitly forced so as
2844 this may change program's memory overhead drastically when the
2845 function using alloca is called in loop. In GCC present in
2846 SPEC2000 inlining into schedule_block cause it to require 2GB of
2847 RAM instead of 256MB. */
2848 if (gimple_alloca_call_p (stmt)
2849 && !lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)))
2851 inline_forbidden_reason
2852 = G_("function %q+F can never be inlined because it uses "
2853 "alloca (override using the always_inline attribute)");
2854 *handled_ops_p = true;
2858 t = gimple_call_fndecl (stmt);
2862 /* We cannot inline functions that call setjmp. */
2863 if (setjmp_call_p (t))
2865 inline_forbidden_reason
2866 = G_("function %q+F can never be inlined because it uses setjmp");
2867 *handled_ops_p = true;
2871 if (DECL_BUILT_IN_CLASS (t) == BUILT_IN_NORMAL)
2872 switch (DECL_FUNCTION_CODE (t))
2874 /* We cannot inline functions that take a variable number of
2876 case BUILT_IN_VA_START:
2877 case BUILT_IN_NEXT_ARG:
2878 case BUILT_IN_VA_END:
2879 inline_forbidden_reason
2880 = G_("function %q+F can never be inlined because it "
2881 "uses variable argument lists");
2882 *handled_ops_p = true;
2885 case BUILT_IN_LONGJMP:
2886 /* We can't inline functions that call __builtin_longjmp at
2887 all. The non-local goto machinery really requires the
2888 destination be in a different function. If we allow the
2889 function calling __builtin_longjmp to be inlined into the
2890 function calling __builtin_setjmp, Things will Go Awry. */
2891 inline_forbidden_reason
2892 = G_("function %q+F can never be inlined because "
2893 "it uses setjmp-longjmp exception handling");
2894 *handled_ops_p = true;
2897 case BUILT_IN_NONLOCAL_GOTO:
2899 inline_forbidden_reason
2900 = G_("function %q+F can never be inlined because "
2901 "it uses non-local goto");
2902 *handled_ops_p = true;
2905 case BUILT_IN_RETURN:
2906 case BUILT_IN_APPLY_ARGS:
2907 /* If a __builtin_apply_args caller would be inlined,
2908 it would be saving arguments of the function it has
2909 been inlined into. Similarly __builtin_return would
2910 return from the function the inline has been inlined into. */
2911 inline_forbidden_reason
2912 = G_("function %q+F can never be inlined because "
2913 "it uses __builtin_return or __builtin_apply_args");
2914 *handled_ops_p = true;
2923 t = gimple_goto_dest (stmt);
2925 /* We will not inline a function which uses computed goto. The
2926 addresses of its local labels, which may be tucked into
2927 global storage, are of course not constant across
2928 instantiations, which causes unexpected behavior. */
2929 if (TREE_CODE (t) != LABEL_DECL)
2931 inline_forbidden_reason
2932 = G_("function %q+F can never be inlined "
2933 "because it contains a computed goto");
2934 *handled_ops_p = true;
2943 *handled_ops_p = false;
2947 /* Return true if FNDECL is a function that cannot be inlined into
2951 inline_forbidden_p (tree fndecl)
2953 struct function *fun = DECL_STRUCT_FUNCTION (fndecl);
2954 struct walk_stmt_info wi;
2955 struct pointer_set_t *visited_nodes;
2957 bool forbidden_p = false;
2959 /* First check for shared reasons not to copy the code. */
2960 inline_forbidden_reason = copy_forbidden (fun, fndecl);
2961 if (inline_forbidden_reason != NULL)
2964 /* Next, walk the statements of the function looking for
2965 constraucts we can't handle, or are non-optimal for inlining. */
2966 visited_nodes = pointer_set_create ();
2967 memset (&wi, 0, sizeof (wi));
2968 wi.info = (void *) fndecl;
2969 wi.pset = visited_nodes;
2971 FOR_EACH_BB_FN (bb, fun)
2974 gimple_seq seq = bb_seq (bb);
2975 ret = walk_gimple_seq (seq, inline_forbidden_p_stmt, NULL, &wi);
2976 forbidden_p = (ret != NULL);
2981 pointer_set_destroy (visited_nodes);
2985 /* Returns nonzero if FN is a function that does not have any
2986 fundamental inline blocking properties. */
2989 tree_inlinable_function_p (tree fn)
2991 bool inlinable = true;
2995 /* If we've already decided this function shouldn't be inlined,
2996 there's no need to check again. */
2997 if (DECL_UNINLINABLE (fn))
3000 /* We only warn for functions declared `inline' by the user. */
3001 do_warning = (warn_inline
3002 && DECL_DECLARED_INLINE_P (fn)
3003 && !DECL_NO_INLINE_WARNING_P (fn)
3004 && !DECL_IN_SYSTEM_HEADER (fn));
3006 always_inline = lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn));
3009 && always_inline == NULL)
3012 warning (OPT_Winline, "function %q+F can never be inlined because it "
3013 "is suppressed using -fno-inline", fn);
3017 /* Don't auto-inline anything that might not be bound within
3018 this unit of translation. */
3019 else if (!DECL_DECLARED_INLINE_P (fn)
3020 && DECL_REPLACEABLE_P (fn))
3023 else if (!function_attribute_inlinable_p (fn))
3026 warning (OPT_Winline, "function %q+F can never be inlined because it "
3027 "uses attributes conflicting with inlining", fn);
3031 else if (inline_forbidden_p (fn))
3033 /* See if we should warn about uninlinable functions. Previously,
3034 some of these warnings would be issued while trying to expand
3035 the function inline, but that would cause multiple warnings
3036 about functions that would for example call alloca. But since
3037 this a property of the function, just one warning is enough.
3038 As a bonus we can now give more details about the reason why a
3039 function is not inlinable. */
3041 sorry (inline_forbidden_reason, fn);
3042 else if (do_warning)
3043 warning (OPT_Winline, inline_forbidden_reason, fn);
3048 /* Squirrel away the result so that we don't have to check again. */
3049 DECL_UNINLINABLE (fn) = !inlinable;
3054 /* Estimate the cost of a memory move. Use machine dependent
3055 word size and take possible memcpy call into account. */
3058 estimate_move_cost (tree type)
3062 gcc_assert (!VOID_TYPE_P (type));
3064 size = int_size_in_bytes (type);
3066 if (size < 0 || size > MOVE_MAX_PIECES * MOVE_RATIO (!optimize_size))
3067 /* Cost of a memcpy call, 3 arguments and the call. */
3070 return ((size + MOVE_MAX_PIECES - 1) / MOVE_MAX_PIECES);
3073 /* Returns cost of operation CODE, according to WEIGHTS */
3076 estimate_operator_cost (enum tree_code code, eni_weights *weights,
3077 tree op1 ATTRIBUTE_UNUSED, tree op2)
3081 /* These are "free" conversions, or their presumed cost
3082 is folded into other operations. */
3089 /* Assign cost of 1 to usual operations.
3090 ??? We may consider mapping RTL costs to this. */
3095 case POINTER_PLUS_EXPR:
3099 case ADDR_SPACE_CONVERT_EXPR:
3100 case FIXED_CONVERT_EXPR:
3101 case FIX_TRUNC_EXPR:
3113 case VEC_LSHIFT_EXPR:
3114 case VEC_RSHIFT_EXPR:
3121 case TRUTH_ANDIF_EXPR:
3122 case TRUTH_ORIF_EXPR:
3123 case TRUTH_AND_EXPR:
3125 case TRUTH_XOR_EXPR:
3126 case TRUTH_NOT_EXPR:
3135 case UNORDERED_EXPR:
3146 case PREDECREMENT_EXPR:
3147 case PREINCREMENT_EXPR:
3148 case POSTDECREMENT_EXPR:
3149 case POSTINCREMENT_EXPR:
3151 case REALIGN_LOAD_EXPR:
3153 case REDUC_MAX_EXPR:
3154 case REDUC_MIN_EXPR:
3155 case REDUC_PLUS_EXPR:
3156 case WIDEN_SUM_EXPR:
3157 case WIDEN_MULT_EXPR:
3160 case VEC_WIDEN_MULT_HI_EXPR:
3161 case VEC_WIDEN_MULT_LO_EXPR:
3162 case VEC_UNPACK_HI_EXPR:
3163 case VEC_UNPACK_LO_EXPR:
3164 case VEC_UNPACK_FLOAT_HI_EXPR:
3165 case VEC_UNPACK_FLOAT_LO_EXPR:
3166 case VEC_PACK_TRUNC_EXPR:
3167 case VEC_PACK_SAT_EXPR:
3168 case VEC_PACK_FIX_TRUNC_EXPR:
3169 case VEC_EXTRACT_EVEN_EXPR:
3170 case VEC_EXTRACT_ODD_EXPR:
3171 case VEC_INTERLEAVE_HIGH_EXPR:
3172 case VEC_INTERLEAVE_LOW_EXPR:
3176 /* Few special cases of expensive operations. This is useful
3177 to avoid inlining on functions having too many of these. */
3178 case TRUNC_DIV_EXPR:
3180 case FLOOR_DIV_EXPR:
3181 case ROUND_DIV_EXPR:
3182 case EXACT_DIV_EXPR:
3183 case TRUNC_MOD_EXPR:
3185 case FLOOR_MOD_EXPR:
3186 case ROUND_MOD_EXPR:
3188 if (TREE_CODE (op2) != INTEGER_CST)
3189 return weights->div_mod_cost;
3193 /* We expect a copy assignment with no operator. */
3194 gcc_assert (get_gimple_rhs_class (code) == GIMPLE_SINGLE_RHS);
3200 /* Estimate number of instructions that will be created by expanding
3201 the statements in the statement sequence STMTS.
3202 WEIGHTS contains weights attributed to various constructs. */
3205 int estimate_num_insns_seq (gimple_seq stmts, eni_weights *weights)
3208 gimple_stmt_iterator gsi;
3211 for (gsi = gsi_start (stmts); !gsi_end_p (gsi); gsi_next (&gsi))
3212 cost += estimate_num_insns (gsi_stmt (gsi), weights);
3218 /* Estimate number of instructions that will be created by expanding STMT.
3219 WEIGHTS contains weights attributed to various constructs. */
3222 estimate_num_insns (gimple stmt, eni_weights *weights)
3225 enum gimple_code code = gimple_code (stmt);
3232 /* Try to estimate the cost of assignments. We have three cases to
3234 1) Simple assignments to registers;
3235 2) Stores to things that must live in memory. This includes
3236 "normal" stores to scalars, but also assignments of large
3237 structures, or constructors of big arrays;
3239 Let us look at the first two cases, assuming we have "a = b + C":
3240 <GIMPLE_ASSIGN <var_decl "a">
3241 <plus_expr <var_decl "b"> <constant C>>
3242 If "a" is a GIMPLE register, the assignment to it is free on almost
3243 any target, because "a" usually ends up in a real register. Hence
3244 the only cost of this expression comes from the PLUS_EXPR, and we
3245 can ignore the GIMPLE_ASSIGN.
3246 If "a" is not a GIMPLE register, the assignment to "a" will most
3247 likely be a real store, so the cost of the GIMPLE_ASSIGN is the cost
3248 of moving something into "a", which we compute using the function
3249 estimate_move_cost. */
3250 lhs = gimple_assign_lhs (stmt);
3251 rhs = gimple_assign_rhs1 (stmt);
3253 if (is_gimple_reg (lhs))
3256 cost = estimate_move_cost (TREE_TYPE (lhs));
3258 if (!is_gimple_reg (rhs) && !is_gimple_min_invariant (rhs))
3259 cost += estimate_move_cost (TREE_TYPE (rhs));
3261 cost += estimate_operator_cost (gimple_assign_rhs_code (stmt), weights,
3262 gimple_assign_rhs1 (stmt),
3263 get_gimple_rhs_class (gimple_assign_rhs_code (stmt))
3264 == GIMPLE_BINARY_RHS
3265 ? gimple_assign_rhs2 (stmt) : NULL);
3269 cost = 1 + estimate_operator_cost (gimple_cond_code (stmt), weights,
3270 gimple_op (stmt, 0),
3271 gimple_op (stmt, 1));
3275 /* Take into account cost of the switch + guess 2 conditional jumps for
3278 TODO: once the switch expansion logic is sufficiently separated, we can
3279 do better job on estimating cost of the switch. */
3280 if (weights->time_based)
3281 cost = floor_log2 (gimple_switch_num_labels (stmt)) * 2;
3283 cost = gimple_switch_num_labels (stmt) * 2;
3288 tree decl = gimple_call_fndecl (stmt);
3289 tree addr = gimple_call_fn (stmt);
3290 tree funtype = TREE_TYPE (addr);
3292 if (POINTER_TYPE_P (funtype))
3293 funtype = TREE_TYPE (funtype);
3295 if (decl && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_MD)
3296 cost = weights->target_builtin_call_cost;
3298 cost = weights->call_cost;
3300 if (decl && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
3301 switch (DECL_FUNCTION_CODE (decl))
3303 case BUILT_IN_CONSTANT_P:
3305 case BUILT_IN_EXPECT:
3308 /* Prefetch instruction is not expensive. */
3309 case BUILT_IN_PREFETCH:
3310 cost = weights->target_builtin_call_cost;
3313 /* Exception state returns or moves registers around. */
3314 case BUILT_IN_EH_FILTER:
3315 case BUILT_IN_EH_POINTER:
3316 case BUILT_IN_EH_COPY_VALUES:
3324 funtype = TREE_TYPE (decl);
3326 if (!VOID_TYPE_P (TREE_TYPE (funtype)))
3327 cost += estimate_move_cost (TREE_TYPE (funtype));
3328 /* Our cost must be kept in sync with
3329 cgraph_estimate_size_after_inlining that does use function
3330 declaration to figure out the arguments. */
3331 if (decl && DECL_ARGUMENTS (decl))
3334 for (arg = DECL_ARGUMENTS (decl); arg; arg = TREE_CHAIN (arg))
3335 if (!VOID_TYPE_P (TREE_TYPE (arg)))
3336 cost += estimate_move_cost (TREE_TYPE (arg));
3338 else if (funtype && prototype_p (funtype))
3341 for (t = TYPE_ARG_TYPES (funtype); t && t != void_list_node;
3343 if (!VOID_TYPE_P (TREE_VALUE (t)))
3344 cost += estimate_move_cost (TREE_VALUE (t));
3348 for (i = 0; i < gimple_call_num_args (stmt); i++)
3350 tree arg = gimple_call_arg (stmt, i);
3351 if (!VOID_TYPE_P (TREE_TYPE (arg)))
3352 cost += estimate_move_cost (TREE_TYPE (arg));
3364 case GIMPLE_PREDICT:
3369 return asm_str_count (gimple_asm_string (stmt));
3372 /* This is either going to be an external function call with one
3373 argument, or two register copy statements plus a goto. */
3376 case GIMPLE_EH_DISPATCH:
3377 /* ??? This is going to turn into a switch statement. Ideally
3378 we'd have a look at the eh region and estimate the number of
3383 return estimate_num_insns_seq (gimple_bind_body (stmt), weights);
3385 case GIMPLE_EH_FILTER:
3386 return estimate_num_insns_seq (gimple_eh_filter_failure (stmt), weights);
3389 return estimate_num_insns_seq (gimple_catch_handler (stmt), weights);
3392 return (estimate_num_insns_seq (gimple_try_eval (stmt), weights)
3393 + estimate_num_insns_seq (gimple_try_cleanup (stmt), weights));
3395 /* OpenMP directives are generally very expensive. */
3397 case GIMPLE_OMP_RETURN:
3398 case GIMPLE_OMP_SECTIONS_SWITCH:
3399 case GIMPLE_OMP_ATOMIC_STORE:
3400 case GIMPLE_OMP_CONTINUE:
3401 /* ...except these, which are cheap. */
3404 case GIMPLE_OMP_ATOMIC_LOAD:
3405 return weights->omp_cost;
3407 case GIMPLE_OMP_FOR:
3408 return (weights->omp_cost
3409 + estimate_num_insns_seq (gimple_omp_body (stmt), weights)
3410 + estimate_num_insns_seq (gimple_omp_for_pre_body (stmt), weights));
3412 case GIMPLE_OMP_PARALLEL:
3413 case GIMPLE_OMP_TASK:
3414 case GIMPLE_OMP_CRITICAL:
3415 case GIMPLE_OMP_MASTER:
3416 case GIMPLE_OMP_ORDERED:
3417 case GIMPLE_OMP_SECTION:
3418 case GIMPLE_OMP_SECTIONS:
3419 case GIMPLE_OMP_SINGLE:
3420 return (weights->omp_cost
3421 + estimate_num_insns_seq (gimple_omp_body (stmt), weights));
3430 /* Estimate number of instructions that will be created by expanding
3431 function FNDECL. WEIGHTS contains weights attributed to various
3435 estimate_num_insns_fn (tree fndecl, eni_weights *weights)
3437 struct function *my_function = DECL_STRUCT_FUNCTION (fndecl);
3438 gimple_stmt_iterator bsi;
3442 gcc_assert (my_function && my_function->cfg);
3443 FOR_EACH_BB_FN (bb, my_function)
3445 for (bsi = gsi_start_bb (bb); !gsi_end_p (bsi); gsi_next (&bsi))
3446 n += estimate_num_insns (gsi_stmt (bsi), weights);
3453 /* Initializes weights used by estimate_num_insns. */
3456 init_inline_once (void)
3458 eni_size_weights.call_cost = 1;
3459 eni_size_weights.target_builtin_call_cost = 1;
3460 eni_size_weights.div_mod_cost = 1;
3461 eni_size_weights.omp_cost = 40;
3462 eni_size_weights.time_based = false;
3464 /* Estimating time for call is difficult, since we have no idea what the
3465 called function does. In the current uses of eni_time_weights,
3466 underestimating the cost does less harm than overestimating it, so
3467 we choose a rather small value here. */
3468 eni_time_weights.call_cost = 10;
3469 eni_time_weights.target_builtin_call_cost = 10;
3470 eni_time_weights.div_mod_cost = 10;
3471 eni_time_weights.omp_cost = 40;
3472 eni_time_weights.time_based = true;
3475 /* Estimate the number of instructions in a gimple_seq. */
3478 count_insns_seq (gimple_seq seq, eni_weights *weights)
3480 gimple_stmt_iterator gsi;
3482 for (gsi = gsi_start (seq); !gsi_end_p (gsi); gsi_next (&gsi))
3483 n += estimate_num_insns (gsi_stmt (gsi), weights);
3489 /* Install new lexical TREE_BLOCK underneath 'current_block'. */
3492 prepend_lexical_block (tree current_block, tree new_block)
3494 BLOCK_CHAIN (new_block) = BLOCK_SUBBLOCKS (current_block);
3495 BLOCK_SUBBLOCKS (current_block) = new_block;
3496 BLOCK_SUPERCONTEXT (new_block) = current_block;
3499 /* Fetch callee declaration from the call graph edge going from NODE and
3500 associated with STMR call statement. Return NULL_TREE if not found. */
3502 get_indirect_callee_fndecl (struct cgraph_node *node, gimple stmt)
3504 struct cgraph_edge *cs;
3506 cs = cgraph_edge (node, stmt);
3508 return cs->callee->decl;
3513 /* If STMT is a GIMPLE_CALL, replace it with its inline expansion. */
3516 expand_call_inline (basic_block bb, gimple stmt, copy_body_data *id)
3520 struct pointer_map_t *st, *dst;
3523 location_t saved_location;
3524 struct cgraph_edge *cg_edge;
3525 cgraph_inline_failed_t reason;
3526 basic_block return_block;
3528 gimple_stmt_iterator gsi, stmt_gsi;
3529 bool successfully_inlined = FALSE;
3530 bool purge_dead_abnormal_edges;
3534 /* Set input_location here so we get the right instantiation context
3535 if we call instantiate_decl from inlinable_function_p. */
3536 saved_location = input_location;
3537 if (gimple_has_location (stmt))
3538 input_location = gimple_location (stmt);
3540 /* From here on, we're only interested in CALL_EXPRs. */
3541 if (gimple_code (stmt) != GIMPLE_CALL)
3544 /* First, see if we can figure out what function is being called.
3545 If we cannot, then there is no hope of inlining the function. */
3546 fn = gimple_call_fndecl (stmt);
3549 fn = get_indirect_callee_fndecl (id->dst_node, stmt);
3554 /* Turn forward declarations into real ones. */
3555 fn = cgraph_node (fn)->decl;
3557 /* If FN is a declaration of a function in a nested scope that was
3558 globally declared inline, we don't set its DECL_INITIAL.
3559 However, we can't blindly follow DECL_ABSTRACT_ORIGIN because the
3560 C++ front-end uses it for cdtors to refer to their internal
3561 declarations, that are not real functions. Fortunately those
3562 don't have trees to be saved, so we can tell by checking their
3564 if (!DECL_INITIAL (fn)
3565 && DECL_ABSTRACT_ORIGIN (fn)
3566 && gimple_has_body_p (DECL_ABSTRACT_ORIGIN (fn)))
3567 fn = DECL_ABSTRACT_ORIGIN (fn);
3569 /* Objective C and fortran still calls tree_rest_of_compilation directly.
3570 Kill this check once this is fixed. */
3571 if (!id->dst_node->analyzed)
3574 cg_edge = cgraph_edge (id->dst_node, stmt);
3576 /* Don't inline functions with different EH personalities. */
3577 if (DECL_FUNCTION_PERSONALITY (cg_edge->caller->decl)
3578 && DECL_FUNCTION_PERSONALITY (cg_edge->callee->decl)
3579 && (DECL_FUNCTION_PERSONALITY (cg_edge->caller->decl)
3580 != DECL_FUNCTION_PERSONALITY (cg_edge->callee->decl)))
3583 /* Don't try to inline functions that are not well-suited to
3585 if (!cgraph_inline_p (cg_edge, &reason))
3587 /* If this call was originally indirect, we do not want to emit any
3588 inlining related warnings or sorry messages because there are no
3589 guarantees regarding those. */
3590 if (cg_edge->indirect_call)
3593 if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn))
3594 /* Avoid warnings during early inline pass. */
3595 && cgraph_global_info_ready)
3597 sorry ("inlining failed in call to %q+F: %s", fn,
3598 cgraph_inline_failed_string (reason));
3599 sorry ("called from here");
3601 else if (warn_inline && DECL_DECLARED_INLINE_P (fn)
3602 && !DECL_IN_SYSTEM_HEADER (fn)
3603 && reason != CIF_UNSPECIFIED
3604 && !lookup_attribute ("noinline", DECL_ATTRIBUTES (fn))
3605 /* Avoid warnings during early inline pass. */
3606 && cgraph_global_info_ready)
3608 warning (OPT_Winline, "inlining failed in call to %q+F: %s",
3609 fn, cgraph_inline_failed_string (reason));
3610 warning (OPT_Winline, "called from here");
3614 fn = cg_edge->callee->decl;
3616 #ifdef ENABLE_CHECKING
3617 if (cg_edge->callee->decl != id->dst_node->decl)
3618 verify_cgraph_node (cg_edge->callee);
3621 /* We will be inlining this callee. */
3622 id->eh_lp_nr = lookup_stmt_eh_lp (stmt);
3624 /* Update the callers EH personality. */
3625 if (DECL_FUNCTION_PERSONALITY (cg_edge->callee->decl))
3626 DECL_FUNCTION_PERSONALITY (cg_edge->caller->decl)
3627 = DECL_FUNCTION_PERSONALITY (cg_edge->callee->decl);
3629 /* Split the block holding the GIMPLE_CALL. */
3630 e = split_block (bb, stmt);
3632 return_block = e->dest;
3635 /* split_block splits after the statement; work around this by
3636 moving the call into the second block manually. Not pretty,
3637 but seems easier than doing the CFG manipulation by hand
3638 when the GIMPLE_CALL is in the last statement of BB. */
3639 stmt_gsi = gsi_last_bb (bb);
3640 gsi_remove (&stmt_gsi, false);
3642 /* If the GIMPLE_CALL was in the last statement of BB, it may have
3643 been the source of abnormal edges. In this case, schedule
3644 the removal of dead abnormal edges. */
3645 gsi = gsi_start_bb (return_block);
3646 if (gsi_end_p (gsi))
3648 gsi_insert_after (&gsi, stmt, GSI_NEW_STMT);
3649 purge_dead_abnormal_edges = true;
3653 gsi_insert_before (&gsi, stmt, GSI_NEW_STMT);
3654 purge_dead_abnormal_edges = false;
3657 stmt_gsi = gsi_start_bb (return_block);
3659 /* Build a block containing code to initialize the arguments, the
3660 actual inline expansion of the body, and a label for the return
3661 statements within the function to jump to. The type of the
3662 statement expression is the return type of the function call. */
3663 id->block = make_node (BLOCK);
3664 BLOCK_ABSTRACT_ORIGIN (id->block) = fn;
3665 BLOCK_SOURCE_LOCATION (id->block) = input_location;
3666 prepend_lexical_block (gimple_block (stmt), id->block);
3668 /* Local declarations will be replaced by their equivalents in this
3671 id->decl_map = pointer_map_create ();
3672 dst = id->debug_map;
3673 id->debug_map = NULL;
3675 /* Record the function we are about to inline. */
3677 id->src_node = cg_edge->callee;
3678 id->src_cfun = DECL_STRUCT_FUNCTION (fn);
3679 id->gimple_call = stmt;
3681 gcc_assert (!id->src_cfun->after_inlining);
3684 if (lookup_attribute ("cold", DECL_ATTRIBUTES (fn)))
3686 gimple_stmt_iterator si = gsi_last_bb (bb);
3687 gsi_insert_after (&si, gimple_build_predict (PRED_COLD_FUNCTION,
3691 initialize_inlined_parameters (id, stmt, fn, bb);
3693 if (DECL_INITIAL (fn))
3694 prepend_lexical_block (id->block, remap_blocks (DECL_INITIAL (fn), id));
3696 /* Return statements in the function body will be replaced by jumps
3697 to the RET_LABEL. */
3698 gcc_assert (DECL_INITIAL (fn));
3699 gcc_assert (TREE_CODE (DECL_INITIAL (fn)) == BLOCK);
3701 /* Find the LHS to which the result of this call is assigned. */
3703 if (gimple_call_lhs (stmt))
3705 modify_dest = gimple_call_lhs (stmt);
3707 /* The function which we are inlining might not return a value,
3708 in which case we should issue a warning that the function
3709 does not return a value. In that case the optimizers will
3710 see that the variable to which the value is assigned was not
3711 initialized. We do not want to issue a warning about that
3712 uninitialized variable. */
3713 if (DECL_P (modify_dest))
3714 TREE_NO_WARNING (modify_dest) = 1;
3716 if (gimple_call_return_slot_opt_p (stmt))
3718 return_slot = modify_dest;
3725 /* If we are inlining a call to the C++ operator new, we don't want
3726 to use type based alias analysis on the return value. Otherwise
3727 we may get confused if the compiler sees that the inlined new
3728 function returns a pointer which was just deleted. See bug
3730 if (DECL_IS_OPERATOR_NEW (fn))
3736 /* Declare the return variable for the function. */
3737 use_retvar = declare_return_variable (id, return_slot, modify_dest);
3739 /* Add local vars in this inlined callee to caller. */
3740 t_step = id->src_cfun->local_decls;
3741 for (; t_step; t_step = TREE_CHAIN (t_step))
3743 var = TREE_VALUE (t_step);
3744 if (TREE_STATIC (var) && !TREE_ASM_WRITTEN (var))
3746 if (var_ann (var) && add_referenced_var (var))
3747 cfun->local_decls = tree_cons (NULL_TREE, var,
3750 else if (!can_be_nonlocal (var, id))
3751 cfun->local_decls = tree_cons (NULL_TREE, remap_decl (var, id),
3755 if (dump_file && (dump_flags & TDF_DETAILS))
3757 fprintf (dump_file, "Inlining ");
3758 print_generic_expr (dump_file, id->src_fn, 0);
3759 fprintf (dump_file, " to ");
3760 print_generic_expr (dump_file, id->dst_fn, 0);
3761 fprintf (dump_file, " with frequency %i\n", cg_edge->frequency);
3764 /* This is it. Duplicate the callee body. Assume callee is
3765 pre-gimplified. Note that we must not alter the caller
3766 function in any way before this point, as this CALL_EXPR may be
3767 a self-referential call; if we're calling ourselves, we need to
3768 duplicate our body before altering anything. */
3769 copy_body (id, bb->count,
3770 cg_edge->frequency * REG_BR_PROB_BASE / CGRAPH_FREQ_BASE,
3773 /* Reset the escaped and callused solutions. */
3774 if (cfun->gimple_df)
3776 pt_solution_reset (&cfun->gimple_df->escaped);
3777 pt_solution_reset (&cfun->gimple_df->callused);
3783 pointer_map_destroy (id->debug_map);
3784 id->debug_map = dst;
3786 pointer_map_destroy (id->decl_map);
3789 /* Unlink the calls virtual operands before replacing it. */
3790 unlink_stmt_vdef (stmt);
3792 /* If the inlined function returns a result that we care about,
3793 substitute the GIMPLE_CALL with an assignment of the return
3794 variable to the LHS of the call. That is, if STMT was
3795 'a = foo (...)', substitute the call with 'a = USE_RETVAR'. */
3796 if (use_retvar && gimple_call_lhs (stmt))
3798 gimple old_stmt = stmt;
3799 stmt = gimple_build_assign (gimple_call_lhs (stmt), use_retvar);
3800 gsi_replace (&stmt_gsi, stmt, false);
3801 if (gimple_in_ssa_p (cfun))
3802 mark_symbols_for_renaming (stmt);
3803 maybe_clean_or_replace_eh_stmt (old_stmt, stmt);
3807 /* Handle the case of inlining a function with no return
3808 statement, which causes the return value to become undefined. */
3809 if (gimple_call_lhs (stmt)
3810 && TREE_CODE (gimple_call_lhs (stmt)) == SSA_NAME)
3812 tree name = gimple_call_lhs (stmt);
3813 tree var = SSA_NAME_VAR (name);
3814 tree def = gimple_default_def (cfun, var);
3818 /* If the variable is used undefined, make this name
3819 undefined via a move. */
3820 stmt = gimple_build_assign (gimple_call_lhs (stmt), def);
3821 gsi_replace (&stmt_gsi, stmt, true);
3825 /* Otherwise make this variable undefined. */
3826 gsi_remove (&stmt_gsi, true);
3827 set_default_def (var, name);
3828 SSA_NAME_DEF_STMT (name) = gimple_build_nop ();
3832 gsi_remove (&stmt_gsi, true);
3835 if (purge_dead_abnormal_edges)
3836 gimple_purge_dead_abnormal_call_edges (return_block);
3838 /* If the value of the new expression is ignored, that's OK. We
3839 don't warn about this for CALL_EXPRs, so we shouldn't warn about
3840 the equivalent inlined version either. */
3841 if (is_gimple_assign (stmt))
3843 gcc_assert (gimple_assign_single_p (stmt)
3844 || CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (stmt)));
3845 TREE_USED (gimple_assign_rhs1 (stmt)) = 1;
3848 /* Output the inlining info for this abstract function, since it has been
3849 inlined. If we don't do this now, we can lose the information about the
3850 variables in the function when the blocks get blown away as soon as we
3851 remove the cgraph node. */
3852 (*debug_hooks->outlining_inline_function) (cg_edge->callee->decl);
3854 /* Update callgraph if needed. */
3855 cgraph_remove_node (cg_edge->callee);
3857 id->block = NULL_TREE;
3858 successfully_inlined = TRUE;
3861 input_location = saved_location;
3862 return successfully_inlined;
3865 /* Expand call statements reachable from STMT_P.
3866 We can only have CALL_EXPRs as the "toplevel" tree code or nested
3867 in a MODIFY_EXPR. See tree-gimple.c:get_call_expr_in(). We can
3868 unfortunately not use that function here because we need a pointer
3869 to the CALL_EXPR, not the tree itself. */
3872 gimple_expand_calls_inline (basic_block bb, copy_body_data *id)
3874 gimple_stmt_iterator gsi;
3876 for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
3878 gimple stmt = gsi_stmt (gsi);
3880 if (is_gimple_call (stmt)
3881 && expand_call_inline (bb, stmt, id))
3889 /* Walk all basic blocks created after FIRST and try to fold every statement
3890 in the STATEMENTS pointer set. */
3893 fold_marked_statements (int first, struct pointer_set_t *statements)
3895 for (; first < n_basic_blocks; first++)
3896 if (BASIC_BLOCK (first))
3898 gimple_stmt_iterator gsi;
3900 for (gsi = gsi_start_bb (BASIC_BLOCK (first));
3903 if (pointer_set_contains (statements, gsi_stmt (gsi)))
3905 gimple old_stmt = gsi_stmt (gsi);
3906 tree old_decl = is_gimple_call (old_stmt) ? gimple_call_fndecl (old_stmt) : 0;
3908 if (old_decl && DECL_BUILT_IN (old_decl))
3910 /* Folding builtins can create multiple instructions,
3911 we need to look at all of them. */
3912 gimple_stmt_iterator i2 = gsi;
3914 if (fold_stmt (&gsi))
3918 i2 = gsi_start_bb (BASIC_BLOCK (first));
3923 new_stmt = gsi_stmt (i2);
3924 update_stmt (new_stmt);
3925 cgraph_update_edges_for_call_stmt (old_stmt, old_decl,
3928 if (new_stmt == gsi_stmt (gsi))
3930 /* It is okay to check only for the very last
3931 of these statements. If it is a throwing
3932 statement nothing will change. If it isn't
3933 this can remove EH edges. If that weren't
3934 correct then because some intermediate stmts
3935 throw, but not the last one. That would mean
3936 we'd have to split the block, which we can't
3937 here and we'd loose anyway. And as builtins
3938 probably never throw, this all
3940 if (maybe_clean_or_replace_eh_stmt (old_stmt,
3942 gimple_purge_dead_eh_edges (BASIC_BLOCK (first));
3949 else if (fold_stmt (&gsi))
3951 /* Re-read the statement from GSI as fold_stmt() may
3953 gimple new_stmt = gsi_stmt (gsi);
3954 update_stmt (new_stmt);
3956 if (is_gimple_call (old_stmt)
3957 || is_gimple_call (new_stmt))
3958 cgraph_update_edges_for_call_stmt (old_stmt, old_decl,
3961 if (maybe_clean_or_replace_eh_stmt (old_stmt, new_stmt))
3962 gimple_purge_dead_eh_edges (BASIC_BLOCK (first));
3968 /* Return true if BB has at least one abnormal outgoing edge. */
3971 has_abnormal_outgoing_edge_p (basic_block bb)
3976 FOR_EACH_EDGE (e, ei, bb->succs)
3977 if (e->flags & EDGE_ABNORMAL)
3983 /* Expand calls to inline functions in the body of FN. */
3986 optimize_inline_calls (tree fn)
3990 int last = n_basic_blocks;
3991 struct gimplify_ctx gctx;
3993 /* There is no point in performing inlining if errors have already
3994 occurred -- and we might crash if we try to inline invalid
3996 if (errorcount || sorrycount)
4000 memset (&id, 0, sizeof (id));
4002 id.src_node = id.dst_node = cgraph_node (fn);
4004 /* Or any functions that aren't finished yet. */
4005 if (current_function_decl)
4006 id.dst_fn = current_function_decl;
4008 id.copy_decl = copy_decl_maybe_to_var;
4009 id.transform_call_graph_edges = CB_CGE_DUPLICATE;
4010 id.transform_new_cfg = false;
4011 id.transform_return_to_modify = true;
4012 id.transform_lang_insert_block = NULL;
4013 id.statements_to_fold = pointer_set_create ();
4015 push_gimplify_context (&gctx);
4017 /* We make no attempts to keep dominance info up-to-date. */
4018 free_dominance_info (CDI_DOMINATORS);
4019 free_dominance_info (CDI_POST_DOMINATORS);
4021 /* Register specific gimple functions. */
4022 gimple_register_cfg_hooks ();
4024 /* Reach the trees by walking over the CFG, and note the
4025 enclosing basic-blocks in the call edges. */
4026 /* We walk the blocks going forward, because inlined function bodies
4027 will split id->current_basic_block, and the new blocks will
4028 follow it; we'll trudge through them, processing their CALL_EXPRs
4031 gimple_expand_calls_inline (bb, &id);
4033 pop_gimplify_context (NULL);
4035 #ifdef ENABLE_CHECKING
4037 struct cgraph_edge *e;
4039 verify_cgraph_node (id.dst_node);
4041 /* Double check that we inlined everything we are supposed to inline. */
4042 for (e = id.dst_node->callees; e; e = e->next_callee)
4043 gcc_assert (e->inline_failed);
4047 /* Fold the statements before compacting/renumbering the basic blocks. */
4048 fold_marked_statements (last, id.statements_to_fold);
4049 pointer_set_destroy (id.statements_to_fold);
4051 gcc_assert (!id.debug_stmts);
4053 /* Renumber the (code) basic_blocks consecutively. */
4055 /* Renumber the lexical scoping (non-code) blocks consecutively. */
4058 fold_cond_expr_cond ();
4059 delete_unreachable_blocks_update_callgraph (&id);
4060 #ifdef ENABLE_CHECKING
4061 verify_cgraph_node (id.dst_node);
4064 /* It would be nice to check SSA/CFG/statement consistency here, but it is
4065 not possible yet - the IPA passes might make various functions to not
4066 throw and they don't care to proactively update local EH info. This is
4067 done later in fixup_cfg pass that also execute the verification. */
4068 return (TODO_update_ssa
4070 | (gimple_in_ssa_p (cfun) ? TODO_remove_unused_locals : 0)
4071 | (profile_status != PROFILE_ABSENT ? TODO_rebuild_frequencies : 0));
4074 /* Passed to walk_tree. Copies the node pointed to, if appropriate. */
4077 copy_tree_r (tree *tp, int *walk_subtrees, void *data ATTRIBUTE_UNUSED)
4079 enum tree_code code = TREE_CODE (*tp);
4080 enum tree_code_class cl = TREE_CODE_CLASS (code);
4082 /* We make copies of most nodes. */
4083 if (IS_EXPR_CODE_CLASS (cl)
4084 || code == TREE_LIST
4086 || code == TYPE_DECL
4087 || code == OMP_CLAUSE)
4089 /* Because the chain gets clobbered when we make a copy, we save it
4091 tree chain = NULL_TREE, new_tree;
4093 chain = TREE_CHAIN (*tp);
4095 /* Copy the node. */
4096 new_tree = copy_node (*tp);
4098 /* Propagate mudflap marked-ness. */
4099 if (flag_mudflap && mf_marked_p (*tp))
4104 /* Now, restore the chain, if appropriate. That will cause
4105 walk_tree to walk into the chain as well. */
4106 if (code == PARM_DECL
4107 || code == TREE_LIST
4108 || code == OMP_CLAUSE)
4109 TREE_CHAIN (*tp) = chain;
4111 /* For now, we don't update BLOCKs when we make copies. So, we
4112 have to nullify all BIND_EXPRs. */
4113 if (TREE_CODE (*tp) == BIND_EXPR)
4114 BIND_EXPR_BLOCK (*tp) = NULL_TREE;
4116 else if (code == CONSTRUCTOR)
4118 /* CONSTRUCTOR nodes need special handling because
4119 we need to duplicate the vector of elements. */
4122 new_tree = copy_node (*tp);
4124 /* Propagate mudflap marked-ness. */
4125 if (flag_mudflap && mf_marked_p (*tp))
4128 CONSTRUCTOR_ELTS (new_tree) = VEC_copy (constructor_elt, gc,
4129 CONSTRUCTOR_ELTS (*tp));
4132 else if (TREE_CODE_CLASS (code) == tcc_type)
4134 else if (TREE_CODE_CLASS (code) == tcc_declaration)
4136 else if (TREE_CODE_CLASS (code) == tcc_constant)
4139 gcc_assert (code != STATEMENT_LIST);
4143 /* The SAVE_EXPR pointed to by TP is being copied. If ST contains
4144 information indicating to what new SAVE_EXPR this one should be mapped,
4145 use that one. Otherwise, create a new node and enter it in ST. FN is
4146 the function into which the copy will be placed. */
4149 remap_save_expr (tree *tp, void *st_, int *walk_subtrees)
4151 struct pointer_map_t *st = (struct pointer_map_t *) st_;
4155 /* See if we already encountered this SAVE_EXPR. */
4156 n = (tree *) pointer_map_contains (st, *tp);
4158 /* If we didn't already remap this SAVE_EXPR, do so now. */
4161 t = copy_node (*tp);
4163 /* Remember this SAVE_EXPR. */
4164 *pointer_map_insert (st, *tp) = t;
4165 /* Make sure we don't remap an already-remapped SAVE_EXPR. */
4166 *pointer_map_insert (st, t) = t;
4170 /* We've already walked into this SAVE_EXPR; don't do it again. */
4175 /* Replace this SAVE_EXPR with the copy. */
4179 /* Called via walk_tree. If *TP points to a DECL_STMT for a local label,
4180 copies the declaration and enters it in the splay_tree in DATA (which is
4181 really an `copy_body_data *'). */
4184 mark_local_for_remap_r (tree *tp, int *walk_subtrees ATTRIBUTE_UNUSED,
4187 copy_body_data *id = (copy_body_data *) data;
4189 /* Don't walk into types. */
4193 else if (TREE_CODE (*tp) == LABEL_EXPR)
4195 tree decl = TREE_OPERAND (*tp, 0);
4197 /* Copy the decl and remember the copy. */
4198 insert_decl_map (id, decl, id->copy_decl (decl, id));
4204 /* Perform any modifications to EXPR required when it is unsaved. Does
4205 not recurse into EXPR's subtrees. */
4208 unsave_expr_1 (tree expr)
4210 switch (TREE_CODE (expr))
4213 /* Don't mess with a TARGET_EXPR that hasn't been expanded.
4214 It's OK for this to happen if it was part of a subtree that
4215 isn't immediately expanded, such as operand 2 of another
4217 if (TREE_OPERAND (expr, 1))
4220 TREE_OPERAND (expr, 1) = TREE_OPERAND (expr, 3);
4221 TREE_OPERAND (expr, 3) = NULL_TREE;
4229 /* Called via walk_tree when an expression is unsaved. Using the
4230 splay_tree pointed to by ST (which is really a `splay_tree'),
4231 remaps all local declarations to appropriate replacements. */
4234 unsave_r (tree *tp, int *walk_subtrees, void *data)
4236 copy_body_data *id = (copy_body_data *) data;
4237 struct pointer_map_t *st = id->decl_map;
4240 /* Only a local declaration (variable or label). */
4241 if ((TREE_CODE (*tp) == VAR_DECL && !TREE_STATIC (*tp))
4242 || TREE_CODE (*tp) == LABEL_DECL)
4244 /* Lookup the declaration. */
4245 n = (tree *) pointer_map_contains (st, *tp);
4247 /* If it's there, remap it. */
4252 else if (TREE_CODE (*tp) == STATEMENT_LIST)
4254 else if (TREE_CODE (*tp) == BIND_EXPR)
4255 copy_bind_expr (tp, walk_subtrees, id);
4256 else if (TREE_CODE (*tp) == SAVE_EXPR
4257 || TREE_CODE (*tp) == TARGET_EXPR)
4258 remap_save_expr (tp, st, walk_subtrees);
4261 copy_tree_r (tp, walk_subtrees, NULL);
4263 /* Do whatever unsaving is required. */
4264 unsave_expr_1 (*tp);
4267 /* Keep iterating. */
4271 /* Copies everything in EXPR and replaces variables, labels
4272 and SAVE_EXPRs local to EXPR. */
4275 unsave_expr_now (tree expr)
4279 /* There's nothing to do for NULL_TREE. */
4284 memset (&id, 0, sizeof (id));
4285 id.src_fn = current_function_decl;
4286 id.dst_fn = current_function_decl;
4287 id.decl_map = pointer_map_create ();
4288 id.debug_map = NULL;
4290 id.copy_decl = copy_decl_no_change;
4291 id.transform_call_graph_edges = CB_CGE_DUPLICATE;
4292 id.transform_new_cfg = false;
4293 id.transform_return_to_modify = false;
4294 id.transform_lang_insert_block = NULL;
4296 /* Walk the tree once to find local labels. */
4297 walk_tree_without_duplicates (&expr, mark_local_for_remap_r, &id);
4299 /* Walk the tree again, copying, remapping, and unsaving. */
4300 walk_tree (&expr, unsave_r, &id, NULL);
4303 pointer_map_destroy (id.decl_map);
4305 pointer_map_destroy (id.debug_map);
4310 /* Called via walk_gimple_seq. If *GSIP points to a GIMPLE_LABEL for a local
4311 label, copies the declaration and enters it in the splay_tree in DATA (which
4312 is really a 'copy_body_data *'. */
4315 mark_local_labels_stmt (gimple_stmt_iterator *gsip,
4316 bool *handled_ops_p ATTRIBUTE_UNUSED,
4317 struct walk_stmt_info *wi)
4319 copy_body_data *id = (copy_body_data *) wi->info;
4320 gimple stmt = gsi_stmt (*gsip);
4322 if (gimple_code (stmt) == GIMPLE_LABEL)
4324 tree decl = gimple_label_label (stmt);
4326 /* Copy the decl and remember the copy. */
4327 insert_decl_map (id, decl, id->copy_decl (decl, id));
4334 /* Called via walk_gimple_seq by copy_gimple_seq_and_replace_local.
4335 Using the splay_tree pointed to by ST (which is really a `splay_tree'),
4336 remaps all local declarations to appropriate replacements in gimple
4340 replace_locals_op (tree *tp, int *walk_subtrees, void *data)
4342 struct walk_stmt_info *wi = (struct walk_stmt_info*) data;
4343 copy_body_data *id = (copy_body_data *) wi->info;
4344 struct pointer_map_t *st = id->decl_map;
4348 /* Only a local declaration (variable or label). */
4349 if ((TREE_CODE (expr) == VAR_DECL
4350 && !TREE_STATIC (expr))
4351 || TREE_CODE (expr) == LABEL_DECL)
4353 /* Lookup the declaration. */
4354 n = (tree *) pointer_map_contains (st, expr);
4356 /* If it's there, remap it. */
4361 else if (TREE_CODE (expr) == STATEMENT_LIST
4362 || TREE_CODE (expr) == BIND_EXPR
4363 || TREE_CODE (expr) == SAVE_EXPR)
4365 else if (TREE_CODE (expr) == TARGET_EXPR)
4367 /* Don't mess with a TARGET_EXPR that hasn't been expanded.
4368 It's OK for this to happen if it was part of a subtree that
4369 isn't immediately expanded, such as operand 2 of another
4371 if (!TREE_OPERAND (expr, 1))
4373 TREE_OPERAND (expr, 1) = TREE_OPERAND (expr, 3);
4374 TREE_OPERAND (expr, 3) = NULL_TREE;
4378 /* Keep iterating. */
4383 /* Called via walk_gimple_seq by copy_gimple_seq_and_replace_local.
4384 Using the splay_tree pointed to by ST (which is really a `splay_tree'),
4385 remaps all local declarations to appropriate replacements in gimple
4389 replace_locals_stmt (gimple_stmt_iterator *gsip,
4390 bool *handled_ops_p ATTRIBUTE_UNUSED,
4391 struct walk_stmt_info *wi)
4393 copy_body_data *id = (copy_body_data *) wi->info;
4394 gimple stmt = gsi_stmt (*gsip);
4396 if (gimple_code (stmt) == GIMPLE_BIND)
4398 tree block = gimple_bind_block (stmt);
4402 remap_block (&block, id);
4403 gimple_bind_set_block (stmt, block);
4406 /* This will remap a lot of the same decls again, but this should be
4408 if (gimple_bind_vars (stmt))
4409 gimple_bind_set_vars (stmt, remap_decls (gimple_bind_vars (stmt), NULL, id));
4412 /* Keep iterating. */
4417 /* Copies everything in SEQ and replaces variables and labels local to
4418 current_function_decl. */
4421 copy_gimple_seq_and_replace_locals (gimple_seq seq)
4424 struct walk_stmt_info wi;
4425 struct pointer_set_t *visited;
4428 /* There's nothing to do for NULL_TREE. */
4433 memset (&id, 0, sizeof (id));
4434 id.src_fn = current_function_decl;
4435 id.dst_fn = current_function_decl;
4436 id.decl_map = pointer_map_create ();
4437 id.debug_map = NULL;
4439 id.copy_decl = copy_decl_no_change;
4440 id.transform_call_graph_edges = CB_CGE_DUPLICATE;
4441 id.transform_new_cfg = false;
4442 id.transform_return_to_modify = false;
4443 id.transform_lang_insert_block = NULL;
4445 /* Walk the tree once to find local labels. */
4446 memset (&wi, 0, sizeof (wi));
4447 visited = pointer_set_create ();
4450 walk_gimple_seq (seq, mark_local_labels_stmt, NULL, &wi);
4451 pointer_set_destroy (visited);
4453 copy = gimple_seq_copy (seq);
4455 /* Walk the copy, remapping decls. */
4456 memset (&wi, 0, sizeof (wi));
4458 walk_gimple_seq (copy, replace_locals_stmt, replace_locals_op, &wi);
4461 pointer_map_destroy (id.decl_map);
4463 pointer_map_destroy (id.debug_map);
4469 /* Allow someone to determine if SEARCH is a child of TOP from gdb. */
4472 debug_find_tree_1 (tree *tp, int *walk_subtrees ATTRIBUTE_UNUSED, void *data)
4481 debug_find_tree (tree top, tree search)
4483 return walk_tree_without_duplicates (&top, debug_find_tree_1, search) != 0;
4487 /* Declare the variables created by the inliner. Add all the variables in
4488 VARS to BIND_EXPR. */
4491 declare_inline_vars (tree block, tree vars)
4494 for (t = vars; t; t = TREE_CHAIN (t))
4496 DECL_SEEN_IN_BIND_EXPR_P (t) = 1;
4497 gcc_assert (!TREE_STATIC (t) && !TREE_ASM_WRITTEN (t));
4498 cfun->local_decls = tree_cons (NULL_TREE, t, cfun->local_decls);
4502 BLOCK_VARS (block) = chainon (BLOCK_VARS (block), vars);
4505 /* Copy NODE (which must be a DECL). The DECL originally was in the FROM_FN,
4506 but now it will be in the TO_FN. PARM_TO_VAR means enable PARM_DECL to
4507 VAR_DECL translation. */
4510 copy_decl_for_dup_finish (copy_body_data *id, tree decl, tree copy)
4512 /* Don't generate debug information for the copy if we wouldn't have
4513 generated it for the copy either. */
4514 DECL_ARTIFICIAL (copy) = DECL_ARTIFICIAL (decl);
4515 DECL_IGNORED_P (copy) = DECL_IGNORED_P (decl);
4517 /* Set the DECL_ABSTRACT_ORIGIN so the debugging routines know what
4518 declaration inspired this copy. */
4519 DECL_ABSTRACT_ORIGIN (copy) = DECL_ORIGIN (decl);
4521 /* The new variable/label has no RTL, yet. */
4522 if (CODE_CONTAINS_STRUCT (TREE_CODE (copy), TS_DECL_WRTL)
4523 && !TREE_STATIC (copy) && !DECL_EXTERNAL (copy))
4524 SET_DECL_RTL (copy, NULL_RTX);
4526 /* These args would always appear unused, if not for this. */
4527 TREE_USED (copy) = 1;
4529 /* Set the context for the new declaration. */
4530 if (!DECL_CONTEXT (decl))
4531 /* Globals stay global. */
4533 else if (DECL_CONTEXT (decl) != id->src_fn)
4534 /* Things that weren't in the scope of the function we're inlining
4535 from aren't in the scope we're inlining to, either. */
4537 else if (TREE_STATIC (decl))
4538 /* Function-scoped static variables should stay in the original
4542 /* Ordinary automatic local variables are now in the scope of the
4544 DECL_CONTEXT (copy) = id->dst_fn;
4550 copy_decl_to_var (tree decl, copy_body_data *id)
4554 gcc_assert (TREE_CODE (decl) == PARM_DECL
4555 || TREE_CODE (decl) == RESULT_DECL);
4557 type = TREE_TYPE (decl);
4559 copy = build_decl (DECL_SOURCE_LOCATION (id->dst_fn),
4560 VAR_DECL, DECL_NAME (decl), type);
4561 TREE_ADDRESSABLE (copy) = TREE_ADDRESSABLE (decl);
4562 TREE_READONLY (copy) = TREE_READONLY (decl);
4563 TREE_THIS_VOLATILE (copy) = TREE_THIS_VOLATILE (decl);
4564 DECL_GIMPLE_REG_P (copy) = DECL_GIMPLE_REG_P (decl);
4566 return copy_decl_for_dup_finish (id, decl, copy);
4569 /* Like copy_decl_to_var, but create a return slot object instead of a
4570 pointer variable for return by invisible reference. */
4573 copy_result_decl_to_var (tree decl, copy_body_data *id)
4577 gcc_assert (TREE_CODE (decl) == PARM_DECL
4578 || TREE_CODE (decl) == RESULT_DECL);
4580 type = TREE_TYPE (decl);
4581 if (DECL_BY_REFERENCE (decl))
4582 type = TREE_TYPE (type);
4584 copy = build_decl (DECL_SOURCE_LOCATION (id->dst_fn),
4585 VAR_DECL, DECL_NAME (decl), type);
4586 TREE_READONLY (copy) = TREE_READONLY (decl);
4587 TREE_THIS_VOLATILE (copy) = TREE_THIS_VOLATILE (decl);
4588 if (!DECL_BY_REFERENCE (decl))
4590 TREE_ADDRESSABLE (copy) = TREE_ADDRESSABLE (decl);
4591 DECL_GIMPLE_REG_P (copy) = DECL_GIMPLE_REG_P (decl);
4594 return copy_decl_for_dup_finish (id, decl, copy);
4598 copy_decl_no_change (tree decl, copy_body_data *id)
4602 copy = copy_node (decl);
4604 /* The COPY is not abstract; it will be generated in DST_FN. */
4605 DECL_ABSTRACT (copy) = 0;
4606 lang_hooks.dup_lang_specific_decl (copy);
4608 /* TREE_ADDRESSABLE isn't used to indicate that a label's address has
4609 been taken; it's for internal bookkeeping in expand_goto_internal. */
4610 if (TREE_CODE (copy) == LABEL_DECL)
4612 TREE_ADDRESSABLE (copy) = 0;
4613 LABEL_DECL_UID (copy) = -1;
4616 return copy_decl_for_dup_finish (id, decl, copy);
4620 copy_decl_maybe_to_var (tree decl, copy_body_data *id)
4622 if (TREE_CODE (decl) == PARM_DECL || TREE_CODE (decl) == RESULT_DECL)
4623 return copy_decl_to_var (decl, id);
4625 return copy_decl_no_change (decl, id);
4628 /* Return a copy of the function's argument tree. */
4630 copy_arguments_for_versioning (tree orig_parm, copy_body_data * id,
4631 bitmap args_to_skip, tree *vars)
4634 tree new_parm = NULL;
4639 for (arg = orig_parm; arg; arg = TREE_CHAIN (arg), i++)
4640 if (!args_to_skip || !bitmap_bit_p (args_to_skip, i))
4642 tree new_tree = remap_decl (arg, id);
4643 lang_hooks.dup_lang_specific_decl (new_tree);
4645 parg = &TREE_CHAIN (new_tree);
4647 else if (!pointer_map_contains (id->decl_map, arg))
4649 /* Make an equivalent VAR_DECL. If the argument was used
4650 as temporary variable later in function, the uses will be
4651 replaced by local variable. */
4652 tree var = copy_decl_to_var (arg, id);
4654 add_referenced_var (var);
4655 insert_decl_map (id, arg, var);
4656 /* Declare this new variable. */
4657 TREE_CHAIN (var) = *vars;
4663 /* Return a copy of the function's static chain. */
4665 copy_static_chain (tree static_chain, copy_body_data * id)
4667 tree *chain_copy, *pvar;
4669 chain_copy = &static_chain;
4670 for (pvar = chain_copy; *pvar; pvar = &TREE_CHAIN (*pvar))
4672 tree new_tree = remap_decl (*pvar, id);
4673 lang_hooks.dup_lang_specific_decl (new_tree);
4674 TREE_CHAIN (new_tree) = TREE_CHAIN (*pvar);
4677 return static_chain;
4680 /* Return true if the function is allowed to be versioned.
4681 This is a guard for the versioning functionality. */
4684 tree_versionable_function_p (tree fndecl)
4686 return (!lookup_attribute ("noclone", DECL_ATTRIBUTES (fndecl))
4687 && copy_forbidden (DECL_STRUCT_FUNCTION (fndecl), fndecl) == NULL);
4690 /* Delete all unreachable basic blocks and update callgraph.
4691 Doing so is somewhat nontrivial because we need to update all clones and
4692 remove inline function that become unreachable. */
4695 delete_unreachable_blocks_update_callgraph (copy_body_data *id)
4697 bool changed = false;
4698 basic_block b, next_bb;
4700 find_unreachable_blocks ();
4702 /* Delete all unreachable basic blocks. */
4704 for (b = ENTRY_BLOCK_PTR->next_bb; b != EXIT_BLOCK_PTR; b = next_bb)
4706 next_bb = b->next_bb;
4708 if (!(b->flags & BB_REACHABLE))
4710 gimple_stmt_iterator bsi;
4712 for (bsi = gsi_start_bb (b); !gsi_end_p (bsi); gsi_next (&bsi))
4713 if (gimple_code (gsi_stmt (bsi)) == GIMPLE_CALL)
4715 struct cgraph_edge *e;
4716 struct cgraph_node *node;
4718 if ((e = cgraph_edge (id->dst_node, gsi_stmt (bsi))) != NULL)
4720 if (!e->inline_failed)
4721 cgraph_remove_node_and_inline_clones (e->callee);
4723 cgraph_remove_edge (e);
4725 if (id->transform_call_graph_edges == CB_CGE_MOVE_CLONES
4726 && id->dst_node->clones)
4727 for (node = id->dst_node->clones; node != id->dst_node;)
4729 if ((e = cgraph_edge (node, gsi_stmt (bsi))) != NULL)
4731 if (!e->inline_failed)
4732 cgraph_remove_node_and_inline_clones (e->callee);
4734 cgraph_remove_edge (e);
4738 node = node->clones;
4739 else if (node->next_sibling_clone)
4740 node = node->next_sibling_clone;
4743 while (node != id->dst_node && !node->next_sibling_clone)
4744 node = node->clone_of;
4745 if (node != id->dst_node)
4746 node = node->next_sibling_clone;
4750 delete_basic_block (b);
4756 tidy_fallthru_edges ();
4760 /* Update clone info after duplication. */
4763 update_clone_info (copy_body_data * id)
4765 struct cgraph_node *node;
4766 if (!id->dst_node->clones)
4768 for (node = id->dst_node->clones; node != id->dst_node;)
4770 /* First update replace maps to match the new body. */
4771 if (node->clone.tree_map)
4774 for (i = 0; i < VEC_length (ipa_replace_map_p, node->clone.tree_map); i++)
4776 struct ipa_replace_map *replace_info;
4777 replace_info = VEC_index (ipa_replace_map_p, node->clone.tree_map, i);
4778 walk_tree (&replace_info->old_tree, copy_tree_body_r, id, NULL);
4779 walk_tree (&replace_info->new_tree, copy_tree_body_r, id, NULL);
4783 node = node->clones;
4784 else if (node->next_sibling_clone)
4785 node = node->next_sibling_clone;
4788 while (node != id->dst_node && !node->next_sibling_clone)
4789 node = node->clone_of;
4790 if (node != id->dst_node)
4791 node = node->next_sibling_clone;
4796 /* Create a copy of a function's tree.
4797 OLD_DECL and NEW_DECL are FUNCTION_DECL tree nodes
4798 of the original function and the new copied function
4799 respectively. In case we want to replace a DECL
4800 tree with another tree while duplicating the function's
4801 body, TREE_MAP represents the mapping between these
4802 trees. If UPDATE_CLONES is set, the call_stmt fields
4803 of edges of clones of the function will be updated. */
4805 tree_function_versioning (tree old_decl, tree new_decl,
4806 VEC(ipa_replace_map_p,gc)* tree_map,
4807 bool update_clones, bitmap args_to_skip)
4809 struct cgraph_node *old_version_node;
4810 struct cgraph_node *new_version_node;
4814 struct ipa_replace_map *replace_info;
4815 basic_block old_entry_block, bb;
4816 VEC (gimple, heap) *init_stmts = VEC_alloc (gimple, heap, 10);
4819 tree old_current_function_decl = current_function_decl;
4820 tree vars = NULL_TREE;
4822 gcc_assert (TREE_CODE (old_decl) == FUNCTION_DECL
4823 && TREE_CODE (new_decl) == FUNCTION_DECL);
4824 DECL_POSSIBLY_INLINED (old_decl) = 1;
4826 old_version_node = cgraph_node (old_decl);
4827 new_version_node = cgraph_node (new_decl);
4829 /* Output the inlining info for this abstract function, since it has been
4830 inlined. If we don't do this now, we can lose the information about the
4831 variables in the function when the blocks get blown away as soon as we
4832 remove the cgraph node. */
4833 (*debug_hooks->outlining_inline_function) (old_decl);
4835 DECL_ARTIFICIAL (new_decl) = 1;
4836 DECL_ABSTRACT_ORIGIN (new_decl) = DECL_ORIGIN (old_decl);
4837 DECL_FUNCTION_PERSONALITY (new_decl) = DECL_FUNCTION_PERSONALITY (old_decl);
4839 /* Prepare the data structures for the tree copy. */
4840 memset (&id, 0, sizeof (id));
4842 /* Generate a new name for the new version. */
4843 id.statements_to_fold = pointer_set_create ();
4845 id.decl_map = pointer_map_create ();
4846 id.debug_map = NULL;
4847 id.src_fn = old_decl;
4848 id.dst_fn = new_decl;
4849 id.src_node = old_version_node;
4850 id.dst_node = new_version_node;
4851 id.src_cfun = DECL_STRUCT_FUNCTION (old_decl);
4852 if (id.src_node->ipa_transforms_to_apply)
4854 VEC(ipa_opt_pass,heap) * old_transforms_to_apply = id.dst_node->ipa_transforms_to_apply;
4857 id.dst_node->ipa_transforms_to_apply = VEC_copy (ipa_opt_pass, heap,
4858 id.src_node->ipa_transforms_to_apply);
4859 for (i = 0; i < VEC_length (ipa_opt_pass, old_transforms_to_apply); i++)
4860 VEC_safe_push (ipa_opt_pass, heap, id.dst_node->ipa_transforms_to_apply,
4861 VEC_index (ipa_opt_pass,
4862 old_transforms_to_apply,
4866 id.copy_decl = copy_decl_no_change;
4867 id.transform_call_graph_edges
4868 = update_clones ? CB_CGE_MOVE_CLONES : CB_CGE_MOVE;
4869 id.transform_new_cfg = true;
4870 id.transform_return_to_modify = false;
4871 id.transform_lang_insert_block = NULL;
4873 current_function_decl = new_decl;
4874 old_entry_block = ENTRY_BLOCK_PTR_FOR_FUNCTION
4875 (DECL_STRUCT_FUNCTION (old_decl));
4876 initialize_cfun (new_decl, old_decl,
4877 old_entry_block->count);
4878 push_cfun (DECL_STRUCT_FUNCTION (new_decl));
4880 /* Copy the function's static chain. */
4881 p = DECL_STRUCT_FUNCTION (old_decl)->static_chain_decl;
4883 DECL_STRUCT_FUNCTION (new_decl)->static_chain_decl =
4884 copy_static_chain (DECL_STRUCT_FUNCTION (old_decl)->static_chain_decl,
4887 /* If there's a tree_map, prepare for substitution. */
4889 for (i = 0; i < VEC_length (ipa_replace_map_p, tree_map); i++)
4892 replace_info = VEC_index (ipa_replace_map_p, tree_map, i);
4893 if (replace_info->replace_p)
4895 tree op = replace_info->new_tree;
4899 if (TREE_CODE (op) == VIEW_CONVERT_EXPR)
4900 op = TREE_OPERAND (op, 0);
4902 if (TREE_CODE (op) == ADDR_EXPR)
4904 op = TREE_OPERAND (op, 0);
4905 while (handled_component_p (op))
4906 op = TREE_OPERAND (op, 0);
4907 if (TREE_CODE (op) == VAR_DECL)
4908 add_referenced_var (op);
4910 gcc_assert (TREE_CODE (replace_info->old_tree) == PARM_DECL);
4911 init = setup_one_parameter (&id, replace_info->old_tree,
4912 replace_info->new_tree, id.src_fn,
4916 VEC_safe_push (gimple, heap, init_stmts, init);
4919 /* Copy the function's arguments. */
4920 if (DECL_ARGUMENTS (old_decl) != NULL_TREE)
4921 DECL_ARGUMENTS (new_decl) =
4922 copy_arguments_for_versioning (DECL_ARGUMENTS (old_decl), &id,
4923 args_to_skip, &vars);
4925 DECL_INITIAL (new_decl) = remap_blocks (DECL_INITIAL (id.src_fn), &id);
4927 /* Renumber the lexical scoping (non-code) blocks consecutively. */
4928 number_blocks (id.dst_fn);
4930 declare_inline_vars (DECL_INITIAL (new_decl), vars);
4932 if (DECL_STRUCT_FUNCTION (old_decl)->local_decls != NULL_TREE)
4933 /* Add local vars. */
4934 for (t_step = DECL_STRUCT_FUNCTION (old_decl)->local_decls;
4935 t_step; t_step = TREE_CHAIN (t_step))
4937 tree var = TREE_VALUE (t_step);
4938 if (TREE_STATIC (var) && !TREE_ASM_WRITTEN (var))
4939 cfun->local_decls = tree_cons (NULL_TREE, var, cfun->local_decls);
4940 else if (!can_be_nonlocal (var, &id))
4942 tree_cons (NULL_TREE, remap_decl (var, &id),
4946 /* Copy the Function's body. */
4947 copy_body (&id, old_entry_block->count, REG_BR_PROB_BASE,
4948 ENTRY_BLOCK_PTR, EXIT_BLOCK_PTR);
4950 if (DECL_RESULT (old_decl) != NULL_TREE)
4952 tree *res_decl = &DECL_RESULT (old_decl);
4953 DECL_RESULT (new_decl) = remap_decl (*res_decl, &id);
4954 lang_hooks.dup_lang_specific_decl (DECL_RESULT (new_decl));
4957 /* Renumber the lexical scoping (non-code) blocks consecutively. */
4958 number_blocks (new_decl);
4960 /* We want to create the BB unconditionally, so that the addition of
4961 debug stmts doesn't affect BB count, which may in the end cause
4962 codegen differences. */
4963 bb = split_edge (single_succ_edge (ENTRY_BLOCK_PTR));
4964 while (VEC_length (gimple, init_stmts))
4965 insert_init_stmt (&id, bb, VEC_pop (gimple, init_stmts));
4966 update_clone_info (&id);
4968 /* Remap the nonlocal_goto_save_area, if any. */
4969 if (cfun->nonlocal_goto_save_area)
4971 struct walk_stmt_info wi;
4973 memset (&wi, 0, sizeof (wi));
4975 walk_tree (&cfun->nonlocal_goto_save_area, remap_gimple_op_r, &wi, NULL);
4979 pointer_map_destroy (id.decl_map);
4981 pointer_map_destroy (id.debug_map);
4982 free_dominance_info (CDI_DOMINATORS);
4983 free_dominance_info (CDI_POST_DOMINATORS);
4985 fold_marked_statements (0, id.statements_to_fold);
4986 pointer_set_destroy (id.statements_to_fold);
4987 fold_cond_expr_cond ();
4988 delete_unreachable_blocks_update_callgraph (&id);
4989 update_ssa (TODO_update_ssa);
4990 free_dominance_info (CDI_DOMINATORS);
4991 free_dominance_info (CDI_POST_DOMINATORS);
4993 gcc_assert (!id.debug_stmts);
4994 VEC_free (gimple, heap, init_stmts);
4996 current_function_decl = old_current_function_decl;
4997 gcc_assert (!current_function_decl
4998 || DECL_STRUCT_FUNCTION (current_function_decl) == cfun);
5002 /* EXP is CALL_EXPR present in a GENERIC expression tree. Try to integrate
5003 the callee and return the inlined body on success. */
5006 maybe_inline_call_in_expr (tree exp)
5008 tree fn = get_callee_fndecl (exp);
5010 /* We can only try to inline "const" functions. */
5011 if (fn && TREE_READONLY (fn) && DECL_SAVED_TREE (fn))
5013 struct pointer_map_t *decl_map = pointer_map_create ();
5014 call_expr_arg_iterator iter;
5018 /* Remap the parameters. */
5019 for (param = DECL_ARGUMENTS (fn), arg = first_call_expr_arg (exp, &iter);
5021 param = TREE_CHAIN (param), arg = next_call_expr_arg (&iter))
5022 *pointer_map_insert (decl_map, param) = arg;
5024 memset (&id, 0, sizeof (id));
5026 id.dst_fn = current_function_decl;
5027 id.src_cfun = DECL_STRUCT_FUNCTION (fn);
5028 id.decl_map = decl_map;
5030 id.copy_decl = copy_decl_no_change;
5031 id.transform_call_graph_edges = CB_CGE_DUPLICATE;
5032 id.transform_new_cfg = false;
5033 id.transform_return_to_modify = true;
5034 id.transform_lang_insert_block = false;
5036 /* Make sure not to unshare trees behind the front-end's back
5037 since front-end specific mechanisms may rely on sharing. */
5038 id.regimplify = false;
5039 id.do_not_unshare = true;
5041 /* We're not inside any EH region. */
5044 t = copy_tree_body (&id);
5045 pointer_map_destroy (decl_map);
5047 /* We can only return something suitable for use in a GENERIC
5049 if (TREE_CODE (t) == MODIFY_EXPR)
5050 return TREE_OPERAND (t, 1);
5056 /* Duplicate a type, fields and all. */
5059 build_duplicate_type (tree type)
5061 struct copy_body_data id;
5063 memset (&id, 0, sizeof (id));
5064 id.src_fn = current_function_decl;
5065 id.dst_fn = current_function_decl;
5067 id.decl_map = pointer_map_create ();
5068 id.debug_map = NULL;
5069 id.copy_decl = copy_decl_no_change;
5071 type = remap_type_1 (type, &id);
5073 pointer_map_destroy (id.decl_map);
5075 pointer_map_destroy (id.debug_map);
5077 TYPE_CANONICAL (type) = type;
5082 /* Return whether it is safe to inline a function because it used different
5083 target specific options or call site actual types mismatch parameter types.
5084 E is the call edge to be checked. */
5086 tree_can_inline_p (struct cgraph_edge *e)
5089 /* This causes a regression in SPEC in that it prevents a cold function from
5090 inlining a hot function. Perhaps this should only apply to functions
5091 that the user declares hot/cold/optimize explicitly. */
5093 /* Don't inline a function with a higher optimization level than the
5094 caller, or with different space constraints (hot/cold functions). */
5095 tree caller_tree = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (caller);
5096 tree callee_tree = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (callee);
5098 if (caller_tree != callee_tree)
5100 struct cl_optimization *caller_opt
5101 = TREE_OPTIMIZATION ((caller_tree)
5103 : optimization_default_node);
5105 struct cl_optimization *callee_opt
5106 = TREE_OPTIMIZATION ((callee_tree)
5108 : optimization_default_node);
5110 if ((caller_opt->optimize > callee_opt->optimize)
5111 || (caller_opt->optimize_size != callee_opt->optimize_size))
5115 tree caller, callee;
5117 caller = e->caller->decl;
5118 callee = e->callee->decl;
5120 /* We cannot inline a function that uses a different EH personality
5122 if (DECL_FUNCTION_PERSONALITY (caller)
5123 && DECL_FUNCTION_PERSONALITY (callee)
5124 && (DECL_FUNCTION_PERSONALITY (caller)
5125 != DECL_FUNCTION_PERSONALITY (callee)))
5127 e->inline_failed = CIF_UNSPECIFIED;
5128 gimple_call_set_cannot_inline (e->call_stmt, true);
5132 /* Allow the backend to decide if inlining is ok. */
5133 if (!targetm.target_option.can_inline_p (caller, callee))
5135 e->inline_failed = CIF_TARGET_OPTION_MISMATCH;
5136 gimple_call_set_cannot_inline (e->call_stmt, true);
5137 e->call_stmt_cannot_inline_p = true;
5142 && !gimple_check_call_args (e->call_stmt))
5144 e->inline_failed = CIF_MISMATCHED_ARGUMENTS;
5145 gimple_call_set_cannot_inline (e->call_stmt, true);
5146 e->call_stmt_cannot_inline_p = true;