1 /* Inline functions for tree-flow.h
2 Copyright (C) 2001, 2003, 2005, 2006, 2007 Free Software Foundation, Inc.
3 Contributed by Diego Novillo <dnovillo@redhat.com>
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
21 #ifndef _TREE_FLOW_INLINE_H
22 #define _TREE_FLOW_INLINE_H 1
24 /* Inline functions for manipulating various data structures defined in
25 tree-flow.h. See tree-flow.h for documentation. */
27 /* Return true when gimple SSA form was built.
28 gimple_in_ssa_p is queried by gimplifier in various early stages before SSA
29 infrastructure is initialized. Check for presence of the datastructures
32 gimple_in_ssa_p (const struct function
*fun
)
34 return fun
&& fun
->gimple_df
&& fun
->gimple_df
->in_ssa_p
;
37 /* 'true' after aliases have been computed (see compute_may_aliases). */
39 gimple_aliases_computed_p (const struct function
*fun
)
41 gcc_assert (fun
&& fun
->gimple_df
);
42 return fun
->gimple_df
->aliases_computed_p
;
45 /* Addressable variables in the function. If bit I is set, then
46 REFERENCED_VARS (I) has had its address taken. Note that
47 CALL_CLOBBERED_VARS and ADDRESSABLE_VARS are not related. An
48 addressable variable is not necessarily call-clobbered (e.g., a
49 local addressable whose address does not escape) and not all
50 call-clobbered variables are addressable (e.g., a local static
53 gimple_addressable_vars (const struct function
*fun
)
55 gcc_assert (fun
&& fun
->gimple_df
);
56 return fun
->gimple_df
->addressable_vars
;
59 /* Call clobbered variables in the function. If bit I is set, then
60 REFERENCED_VARS (I) is call-clobbered. */
62 gimple_call_clobbered_vars (const struct function
*fun
)
64 gcc_assert (fun
&& fun
->gimple_df
);
65 return fun
->gimple_df
->call_clobbered_vars
;
68 /* Array of all variables referenced in the function. */
70 gimple_referenced_vars (const struct function
*fun
)
74 return fun
->gimple_df
->referenced_vars
;
77 /* Artificial variable used to model the effects of function calls. */
79 gimple_global_var (const struct function
*fun
)
81 gcc_assert (fun
&& fun
->gimple_df
);
82 return fun
->gimple_df
->global_var
;
85 /* Artificial variable used to model the effects of nonlocal
88 gimple_nonlocal_all (const struct function
*fun
)
90 gcc_assert (fun
&& fun
->gimple_df
);
91 return fun
->gimple_df
->nonlocal_all
;
94 /* Initialize the hashtable iterator HTI to point to hashtable TABLE */
97 first_htab_element (htab_iterator
*hti
, htab_t table
)
100 hti
->slot
= table
->entries
;
101 hti
->limit
= hti
->slot
+ htab_size (table
);
104 PTR x
= *(hti
->slot
);
105 if (x
!= HTAB_EMPTY_ENTRY
&& x
!= HTAB_DELETED_ENTRY
)
107 } while (++(hti
->slot
) < hti
->limit
);
109 if (hti
->slot
< hti
->limit
)
114 /* Return current non-empty/deleted slot of the hashtable pointed to by HTI,
115 or NULL if we have reached the end. */
118 end_htab_p (const htab_iterator
*hti
)
120 if (hti
->slot
>= hti
->limit
)
125 /* Advance the hashtable iterator pointed to by HTI to the next element of the
129 next_htab_element (htab_iterator
*hti
)
131 while (++(hti
->slot
) < hti
->limit
)
133 PTR x
= *(hti
->slot
);
134 if (x
!= HTAB_EMPTY_ENTRY
&& x
!= HTAB_DELETED_ENTRY
)
140 /* Initialize ITER to point to the first referenced variable in the
141 referenced_vars hashtable, and return that variable. */
144 first_referenced_var (referenced_var_iterator
*iter
)
146 return (tree
) first_htab_element (&iter
->hti
,
147 gimple_referenced_vars (cfun
));
150 /* Return true if we have hit the end of the referenced variables ITER is
151 iterating through. */
154 end_referenced_vars_p (const referenced_var_iterator
*iter
)
156 return end_htab_p (&iter
->hti
);
159 /* Make ITER point to the next referenced_var in the referenced_var hashtable,
160 and return that variable. */
163 next_referenced_var (referenced_var_iterator
*iter
)
165 return (tree
) next_htab_element (&iter
->hti
);
168 /* Fill up VEC with the variables in the referenced vars hashtable. */
171 fill_referenced_var_vec (VEC (tree
, heap
) **vec
)
173 referenced_var_iterator rvi
;
176 FOR_EACH_REFERENCED_VAR (var
, rvi
)
177 VEC_safe_push (tree
, heap
, *vec
, var
);
180 /* Return the variable annotation for T, which must be a _DECL node.
181 Return NULL if the variable annotation doesn't already exist. */
182 static inline var_ann_t
183 var_ann (const_tree t
)
189 ann
= (var_ann_t
) t
->base
.ann
;
191 gcc_assert (ann
->common
.type
== VAR_ANN
);
196 /* Return the variable annotation for T, which must be a _DECL node.
197 Create the variable annotation if it doesn't exist. */
198 static inline var_ann_t
199 get_var_ann (tree var
)
201 var_ann_t ann
= var_ann (var
);
202 return (ann
) ? ann
: create_var_ann (var
);
205 /* Return the function annotation for T, which must be a FUNCTION_DECL node.
206 Return NULL if the function annotation doesn't already exist. */
207 static inline function_ann_t
208 function_ann (const_tree t
)
211 gcc_assert (TREE_CODE (t
) == FUNCTION_DECL
);
212 gcc_assert (!t
->base
.ann
213 || t
->base
.ann
->common
.type
== FUNCTION_ANN
);
215 return (function_ann_t
) t
->base
.ann
;
218 /* Return the function annotation for T, which must be a FUNCTION_DECL node.
219 Create the function annotation if it doesn't exist. */
220 static inline function_ann_t
221 get_function_ann (tree var
)
223 function_ann_t ann
= function_ann (var
);
224 gcc_assert (!var
->base
.ann
|| var
->base
.ann
->common
.type
== FUNCTION_ANN
);
225 return (ann
) ? ann
: create_function_ann (var
);
228 /* Return true if T has a statement annotation attached to it. */
231 has_stmt_ann (tree t
)
233 #ifdef ENABLE_CHECKING
234 gcc_assert (is_gimple_stmt (t
));
236 return t
->base
.ann
&& t
->base
.ann
->common
.type
== STMT_ANN
;
239 /* Return the statement annotation for T, which must be a statement
240 node. Return NULL if the statement annotation doesn't exist. */
241 static inline stmt_ann_t
244 #ifdef ENABLE_CHECKING
245 gcc_assert (is_gimple_stmt (t
));
247 gcc_assert (!t
->base
.ann
|| t
->base
.ann
->common
.type
== STMT_ANN
);
248 return (stmt_ann_t
) t
->base
.ann
;
251 /* Return the statement annotation for T, which must be a statement
252 node. Create the statement annotation if it doesn't exist. */
253 static inline stmt_ann_t
254 get_stmt_ann (tree stmt
)
256 stmt_ann_t ann
= stmt_ann (stmt
);
257 return (ann
) ? ann
: create_stmt_ann (stmt
);
260 /* Set the uid of all non phi function statements. */
262 set_gimple_stmt_uid (tree stmt
, unsigned int uid
)
264 get_stmt_ann (stmt
)->uid
= uid
;
267 /* Get the uid of all non phi function statements. */
268 static inline unsigned int
269 gimple_stmt_uid (tree stmt
)
271 return get_stmt_ann (stmt
)->uid
;
274 /* Get the number of the next statement uid to be allocated. */
275 static inline unsigned int
276 gimple_stmt_max_uid (struct function
*fn
)
278 return fn
->last_stmt_uid
;
281 /* Set the number of the next statement uid to be allocated. */
283 set_gimple_stmt_max_uid (struct function
*fn
, unsigned int maxid
)
285 fn
->last_stmt_uid
= maxid
;
288 /* Set the number of the next statement uid to be allocated. */
289 static inline unsigned int
290 inc_gimple_stmt_max_uid (struct function
*fn
)
292 return fn
->last_stmt_uid
++;
295 /* Return the annotation type for annotation ANN. */
296 static inline enum tree_ann_type
297 ann_type (tree_ann_t ann
)
299 return ann
->common
.type
;
302 /* Return the basic block for statement T. */
303 static inline basic_block
308 if (TREE_CODE (t
) == PHI_NODE
)
312 return ann
? ann
->bb
: NULL
;
315 /* Return the may_aliases bitmap for variable VAR, or NULL if it has
318 may_aliases (const_tree var
)
320 return MTAG_ALIASES (var
);
323 /* Return the line number for EXPR, or return -1 if we have no line
324 number information for it. */
326 get_lineno (const_tree expr
)
328 if (expr
== NULL_TREE
)
331 if (TREE_CODE (expr
) == COMPOUND_EXPR
)
332 expr
= TREE_OPERAND (expr
, 0);
334 if (! EXPR_HAS_LOCATION (expr
))
337 return EXPR_LINENO (expr
);
340 /* Return true if T is a noreturn call. */
342 noreturn_call_p (tree t
)
344 tree call
= get_call_expr_in (t
);
345 return call
!= 0 && (call_expr_flags (call
) & ECF_NORETURN
) != 0;
348 /* Mark statement T as modified. */
350 mark_stmt_modified (tree t
)
353 if (TREE_CODE (t
) == PHI_NODE
)
358 ann
= create_stmt_ann (t
);
359 else if (noreturn_call_p (t
) && cfun
->gimple_df
)
360 VEC_safe_push (tree
, gc
, MODIFIED_NORETURN_CALLS (cfun
), t
);
364 /* Mark statement T as modified, and update it. */
368 if (TREE_CODE (t
) == PHI_NODE
)
370 mark_stmt_modified (t
);
371 update_stmt_operands (t
);
375 update_stmt_if_modified (tree t
)
377 if (stmt_modified_p (t
))
378 update_stmt_operands (t
);
381 /* Return true if T is marked as modified, false otherwise. */
383 stmt_modified_p (tree t
)
385 stmt_ann_t ann
= stmt_ann (t
);
387 /* Note that if the statement doesn't yet have an annotation, we consider it
388 modified. This will force the next call to update_stmt_operands to scan
390 return ann
? ann
->modified
: true;
393 /* Delink an immediate_uses node from its chain. */
395 delink_imm_use (ssa_use_operand_t
*linknode
)
397 /* Return if this node is not in a list. */
398 if (linknode
->prev
== NULL
)
401 linknode
->prev
->next
= linknode
->next
;
402 linknode
->next
->prev
= linknode
->prev
;
403 linknode
->prev
= NULL
;
404 linknode
->next
= NULL
;
407 /* Link ssa_imm_use node LINKNODE into the chain for LIST. */
409 link_imm_use_to_list (ssa_use_operand_t
*linknode
, ssa_use_operand_t
*list
)
411 /* Link the new node at the head of the list. If we are in the process of
412 traversing the list, we won't visit any new nodes added to it. */
413 linknode
->prev
= list
;
414 linknode
->next
= list
->next
;
415 list
->next
->prev
= linknode
;
416 list
->next
= linknode
;
419 /* Link ssa_imm_use node LINKNODE into the chain for DEF. */
421 link_imm_use (ssa_use_operand_t
*linknode
, tree def
)
423 ssa_use_operand_t
*root
;
425 if (!def
|| TREE_CODE (def
) != SSA_NAME
)
426 linknode
->prev
= NULL
;
429 root
= &(SSA_NAME_IMM_USE_NODE (def
));
430 #ifdef ENABLE_CHECKING
432 gcc_assert (*(linknode
->use
) == def
);
434 link_imm_use_to_list (linknode
, root
);
438 /* Set the value of a use pointed to by USE to VAL. */
440 set_ssa_use_from_ptr (use_operand_p use
, tree val
)
442 delink_imm_use (use
);
444 link_imm_use (use
, val
);
447 /* Link ssa_imm_use node LINKNODE into the chain for DEF, with use occurring
450 link_imm_use_stmt (ssa_use_operand_t
*linknode
, tree def
, tree stmt
)
453 link_imm_use (linknode
, def
);
455 link_imm_use (linknode
, NULL
);
456 linknode
->stmt
= stmt
;
459 /* Relink a new node in place of an old node in the list. */
461 relink_imm_use (ssa_use_operand_t
*node
, ssa_use_operand_t
*old
)
463 /* The node one had better be in the same list. */
464 gcc_assert (*(old
->use
) == *(node
->use
));
465 node
->prev
= old
->prev
;
466 node
->next
= old
->next
;
469 old
->prev
->next
= node
;
470 old
->next
->prev
= node
;
471 /* Remove the old node from the list. */
476 /* Relink ssa_imm_use node LINKNODE into the chain for OLD, with use occurring
479 relink_imm_use_stmt (ssa_use_operand_t
*linknode
, ssa_use_operand_t
*old
, tree stmt
)
482 relink_imm_use (linknode
, old
);
484 link_imm_use (linknode
, NULL
);
485 linknode
->stmt
= stmt
;
489 /* Return true is IMM has reached the end of the immediate use list. */
491 end_readonly_imm_use_p (const imm_use_iterator
*imm
)
493 return (imm
->imm_use
== imm
->end_p
);
496 /* Initialize iterator IMM to process the list for VAR. */
497 static inline use_operand_p
498 first_readonly_imm_use (imm_use_iterator
*imm
, tree var
)
500 gcc_assert (TREE_CODE (var
) == SSA_NAME
);
502 imm
->end_p
= &(SSA_NAME_IMM_USE_NODE (var
));
503 imm
->imm_use
= imm
->end_p
->next
;
504 #ifdef ENABLE_CHECKING
505 imm
->iter_node
.next
= imm
->imm_use
->next
;
507 if (end_readonly_imm_use_p (imm
))
508 return NULL_USE_OPERAND_P
;
512 /* Bump IMM to the next use in the list. */
513 static inline use_operand_p
514 next_readonly_imm_use (imm_use_iterator
*imm
)
516 use_operand_p old
= imm
->imm_use
;
518 #ifdef ENABLE_CHECKING
519 /* If this assertion fails, it indicates the 'next' pointer has changed
520 since the last bump. This indicates that the list is being modified
521 via stmt changes, or SET_USE, or somesuch thing, and you need to be
522 using the SAFE version of the iterator. */
523 gcc_assert (imm
->iter_node
.next
== old
->next
);
524 imm
->iter_node
.next
= old
->next
->next
;
527 imm
->imm_use
= old
->next
;
528 if (end_readonly_imm_use_p (imm
))
529 return NULL_USE_OPERAND_P
;
533 /* Return true if VAR has no uses. */
535 has_zero_uses (const_tree var
)
537 const ssa_use_operand_t
*const ptr
= &(SSA_NAME_IMM_USE_NODE (var
));
538 /* A single use means there is no items in the list. */
539 return (ptr
== ptr
->next
);
542 /* Return true if VAR has a single use. */
544 has_single_use (const_tree var
)
546 const ssa_use_operand_t
*const ptr
= &(SSA_NAME_IMM_USE_NODE (var
));
547 /* A single use means there is one item in the list. */
548 return (ptr
!= ptr
->next
&& ptr
== ptr
->next
->next
);
552 /* If VAR has only a single immediate use, return true, and set USE_P and STMT
553 to the use pointer and stmt of occurrence. */
555 single_imm_use (const_tree var
, use_operand_p
*use_p
, tree
*stmt
)
557 const ssa_use_operand_t
*const ptr
= &(SSA_NAME_IMM_USE_NODE (var
));
558 if (ptr
!= ptr
->next
&& ptr
== ptr
->next
->next
)
561 *stmt
= ptr
->next
->stmt
;
564 *use_p
= NULL_USE_OPERAND_P
;
569 /* Return the number of immediate uses of VAR. */
570 static inline unsigned int
571 num_imm_uses (const_tree var
)
573 const ssa_use_operand_t
*const start
= &(SSA_NAME_IMM_USE_NODE (var
));
574 const ssa_use_operand_t
*ptr
;
575 unsigned int num
= 0;
577 for (ptr
= start
->next
; ptr
!= start
; ptr
= ptr
->next
)
583 /* Return the tree pointer to by USE. */
585 get_use_from_ptr (use_operand_p use
)
590 /* Return the tree pointer to by DEF. */
592 get_def_from_ptr (def_operand_p def
)
597 /* Return a def_operand_p pointer for the result of PHI. */
598 static inline def_operand_p
599 get_phi_result_ptr (tree phi
)
601 return &(PHI_RESULT_TREE (phi
));
604 /* Return a use_operand_p pointer for argument I of phinode PHI. */
605 static inline use_operand_p
606 get_phi_arg_def_ptr (tree phi
, int i
)
608 return &(PHI_ARG_IMM_USE_NODE (phi
,i
));
612 /* Return the bitmap of addresses taken by STMT, or NULL if it takes
615 addresses_taken (tree stmt
)
617 stmt_ann_t ann
= stmt_ann (stmt
);
618 return ann
? ann
->addresses_taken
: NULL
;
621 /* Return the PHI nodes for basic block BB, or NULL if there are no
624 phi_nodes (const_basic_block bb
)
626 gcc_assert (!(bb
->flags
& BB_RTL
));
629 return bb
->il
.tree
->phi_nodes
;
632 /* Return pointer to the list of PHI nodes for basic block BB. */
635 phi_nodes_ptr (basic_block bb
)
637 gcc_assert (!(bb
->flags
& BB_RTL
));
638 return &bb
->il
.tree
->phi_nodes
;
641 /* Set list of phi nodes of a basic block BB to L. */
644 set_phi_nodes (basic_block bb
, tree l
)
648 gcc_assert (!(bb
->flags
& BB_RTL
));
649 bb
->il
.tree
->phi_nodes
= l
;
650 for (phi
= l
; phi
; phi
= PHI_CHAIN (phi
))
651 set_bb_for_stmt (phi
, bb
);
654 /* Return the phi argument which contains the specified use. */
657 phi_arg_index_from_use (use_operand_p use
)
659 struct phi_arg_d
*element
, *root
;
663 /* Since the use is the first thing in a PHI argument element, we can
664 calculate its index based on casting it to an argument, and performing
665 pointer arithmetic. */
667 phi
= USE_STMT (use
);
668 gcc_assert (TREE_CODE (phi
) == PHI_NODE
);
670 element
= (struct phi_arg_d
*)use
;
671 root
= &(PHI_ARG_ELT (phi
, 0));
672 index
= element
- root
;
674 #ifdef ENABLE_CHECKING
675 /* Make sure the calculation doesn't have any leftover bytes. If it does,
676 then imm_use is likely not the first element in phi_arg_d. */
678 (((char *)element
- (char *)root
) % sizeof (struct phi_arg_d
)) == 0);
679 gcc_assert (index
>= 0 && index
< PHI_ARG_CAPACITY (phi
));
685 /* Mark VAR as used, so that it'll be preserved during rtl expansion. */
688 set_is_used (tree var
)
690 var_ann_t ann
= get_var_ann (var
);
695 /* Return true if T (assumed to be a DECL) is a global variable. */
698 is_global_var (const_tree t
)
701 return (TREE_STATIC (t
) || MTAG_GLOBAL (t
));
703 return (TREE_STATIC (t
) || DECL_EXTERNAL (t
));
706 /* PHI nodes should contain only ssa_names and invariants. A test
707 for ssa_name is definitely simpler; don't let invalid contents
708 slip in in the meantime. */
711 phi_ssa_name_p (const_tree t
)
713 if (TREE_CODE (t
) == SSA_NAME
)
715 #ifdef ENABLE_CHECKING
716 gcc_assert (is_gimple_min_invariant (t
));
721 /* ----------------------------------------------------------------------- */
723 /* Returns the list of statements in BB. */
726 bb_stmt_list (const_basic_block bb
)
728 gcc_assert (!(bb
->flags
& BB_RTL
));
729 return bb
->il
.tree
->stmt_list
;
732 /* Sets the list of statements in BB to LIST. */
735 set_bb_stmt_list (basic_block bb
, tree list
)
737 gcc_assert (!(bb
->flags
& BB_RTL
));
738 bb
->il
.tree
->stmt_list
= list
;
741 /* Return a block_stmt_iterator that points to beginning of basic
743 static inline block_stmt_iterator
744 bsi_start (basic_block bb
)
746 block_stmt_iterator bsi
;
747 if (bb
->index
< NUM_FIXED_BLOCKS
)
750 bsi
.tsi
.container
= NULL
;
753 bsi
.tsi
= tsi_start (bb_stmt_list (bb
));
758 /* Return a block statement iterator that points to the first non-label
759 statement in block BB. */
761 static inline block_stmt_iterator
762 bsi_after_labels (basic_block bb
)
764 block_stmt_iterator bsi
= bsi_start (bb
);
766 while (!bsi_end_p (bsi
) && TREE_CODE (bsi_stmt (bsi
)) == LABEL_EXPR
)
772 /* Return a block statement iterator that points to the end of basic
774 static inline block_stmt_iterator
775 bsi_last (basic_block bb
)
777 block_stmt_iterator bsi
;
779 if (bb
->index
< NUM_FIXED_BLOCKS
)
782 bsi
.tsi
.container
= NULL
;
785 bsi
.tsi
= tsi_last (bb_stmt_list (bb
));
790 /* Return true if block statement iterator I has reached the end of
793 bsi_end_p (block_stmt_iterator i
)
795 return tsi_end_p (i
.tsi
);
798 /* Modify block statement iterator I so that it is at the next
799 statement in the basic block. */
801 bsi_next (block_stmt_iterator
*i
)
806 /* Modify block statement iterator I so that it is at the previous
807 statement in the basic block. */
809 bsi_prev (block_stmt_iterator
*i
)
814 /* Return the statement that block statement iterator I is currently
817 bsi_stmt (block_stmt_iterator i
)
819 return tsi_stmt (i
.tsi
);
822 /* Return a pointer to the statement that block statement iterator I
825 bsi_stmt_ptr (block_stmt_iterator i
)
827 return tsi_stmt_ptr (i
.tsi
);
830 /* Returns the loop of the statement STMT. */
832 static inline struct loop
*
833 loop_containing_stmt (tree stmt
)
835 basic_block bb
= bb_for_stmt (stmt
);
839 return bb
->loop_father
;
843 /* Return the memory partition tag associated with symbol SYM. */
846 memory_partition (tree sym
)
850 /* MPTs belong to their own partition. */
851 if (TREE_CODE (sym
) == MEMORY_PARTITION_TAG
)
854 gcc_assert (!is_gimple_reg (sym
));
855 tag
= get_var_ann (sym
)->mpt
;
857 #if defined ENABLE_CHECKING
859 gcc_assert (TREE_CODE (tag
) == MEMORY_PARTITION_TAG
);
865 /* Return true if NAME is a memory factoring SSA name (i.e., an SSA
866 name for a memory partition. */
869 factoring_name_p (const_tree name
)
871 return TREE_CODE (SSA_NAME_VAR (name
)) == MEMORY_PARTITION_TAG
;
874 /* Return true if VAR is a clobbered by function calls. */
876 is_call_clobbered (const_tree var
)
879 return var_ann (var
)->call_clobbered
;
881 return bitmap_bit_p (gimple_call_clobbered_vars (cfun
), DECL_UID (var
));
884 /* Mark variable VAR as being clobbered by function calls. */
886 mark_call_clobbered (tree var
, unsigned int escape_type
)
888 var_ann (var
)->escape_mask
|= escape_type
;
890 var_ann (var
)->call_clobbered
= true;
891 bitmap_set_bit (gimple_call_clobbered_vars (cfun
), DECL_UID (var
));
894 /* Clear the call-clobbered attribute from variable VAR. */
896 clear_call_clobbered (tree var
)
898 var_ann_t ann
= var_ann (var
);
899 ann
->escape_mask
= 0;
901 MTAG_GLOBAL (var
) = 0;
903 var_ann (var
)->call_clobbered
= false;
904 bitmap_clear_bit (gimple_call_clobbered_vars (cfun
), DECL_UID (var
));
907 /* Return the common annotation for T. Return NULL if the annotation
908 doesn't already exist. */
909 static inline tree_ann_common_t
910 tree_common_ann (const_tree t
)
912 /* Watch out static variables with unshared annotations. */
913 if (DECL_P (t
) && TREE_CODE (t
) == VAR_DECL
)
914 return &var_ann (t
)->common
;
915 return &t
->base
.ann
->common
;
918 /* Return a common annotation for T. Create the constant annotation if it
920 static inline tree_ann_common_t
921 get_tree_common_ann (tree t
)
923 tree_ann_common_t ann
= tree_common_ann (t
);
924 return (ann
) ? ann
: create_tree_common_ann (t
);
927 /* ----------------------------------------------------------------------- */
929 /* The following set of routines are used to iterator over various type of
932 /* Return true if PTR is finished iterating. */
934 op_iter_done (const ssa_op_iter
*ptr
)
939 /* Get the next iterator use value for PTR. */
940 static inline use_operand_p
941 op_iter_next_use (ssa_op_iter
*ptr
)
944 #ifdef ENABLE_CHECKING
945 gcc_assert (ptr
->iter_type
== ssa_op_iter_use
);
949 use_p
= USE_OP_PTR (ptr
->uses
);
950 ptr
->uses
= ptr
->uses
->next
;
955 use_p
= VUSE_OP_PTR (ptr
->vuses
, ptr
->vuse_index
);
956 if (++(ptr
->vuse_index
) >= VUSE_NUM (ptr
->vuses
))
959 ptr
->vuses
= ptr
->vuses
->next
;
965 use_p
= VDEF_OP_PTR (ptr
->mayuses
, ptr
->mayuse_index
);
966 if (++(ptr
->mayuse_index
) >= VDEF_NUM (ptr
->mayuses
))
968 ptr
->mayuse_index
= 0;
969 ptr
->mayuses
= ptr
->mayuses
->next
;
973 if (ptr
->phi_i
< ptr
->num_phi
)
975 return PHI_ARG_DEF_PTR (ptr
->phi_stmt
, (ptr
->phi_i
)++);
978 return NULL_USE_OPERAND_P
;
981 /* Get the next iterator def value for PTR. */
982 static inline def_operand_p
983 op_iter_next_def (ssa_op_iter
*ptr
)
986 #ifdef ENABLE_CHECKING
987 gcc_assert (ptr
->iter_type
== ssa_op_iter_def
);
991 def_p
= DEF_OP_PTR (ptr
->defs
);
992 ptr
->defs
= ptr
->defs
->next
;
997 def_p
= VDEF_RESULT_PTR (ptr
->vdefs
);
998 ptr
->vdefs
= ptr
->vdefs
->next
;
1002 return NULL_DEF_OPERAND_P
;
1005 /* Get the next iterator tree value for PTR. */
1007 op_iter_next_tree (ssa_op_iter
*ptr
)
1010 #ifdef ENABLE_CHECKING
1011 gcc_assert (ptr
->iter_type
== ssa_op_iter_tree
);
1015 val
= USE_OP (ptr
->uses
);
1016 ptr
->uses
= ptr
->uses
->next
;
1021 val
= VUSE_OP (ptr
->vuses
, ptr
->vuse_index
);
1022 if (++(ptr
->vuse_index
) >= VUSE_NUM (ptr
->vuses
))
1024 ptr
->vuse_index
= 0;
1025 ptr
->vuses
= ptr
->vuses
->next
;
1031 val
= VDEF_OP (ptr
->mayuses
, ptr
->mayuse_index
);
1032 if (++(ptr
->mayuse_index
) >= VDEF_NUM (ptr
->mayuses
))
1034 ptr
->mayuse_index
= 0;
1035 ptr
->mayuses
= ptr
->mayuses
->next
;
1041 val
= DEF_OP (ptr
->defs
);
1042 ptr
->defs
= ptr
->defs
->next
;
1047 val
= VDEF_RESULT (ptr
->vdefs
);
1048 ptr
->vdefs
= ptr
->vdefs
->next
;
1058 /* This functions clears the iterator PTR, and marks it done. This is normally
1059 used to prevent warnings in the compile about might be uninitialized
1063 clear_and_done_ssa_iter (ssa_op_iter
*ptr
)
1069 ptr
->mayuses
= NULL
;
1070 ptr
->iter_type
= ssa_op_iter_none
;
1073 ptr
->phi_stmt
= NULL_TREE
;
1075 ptr
->vuse_index
= 0;
1076 ptr
->mayuse_index
= 0;
1079 /* Initialize the iterator PTR to the virtual defs in STMT. */
1081 op_iter_init (ssa_op_iter
*ptr
, tree stmt
, int flags
)
1083 #ifdef ENABLE_CHECKING
1084 gcc_assert (stmt_ann (stmt
));
1087 ptr
->defs
= (flags
& SSA_OP_DEF
) ? DEF_OPS (stmt
) : NULL
;
1088 ptr
->uses
= (flags
& SSA_OP_USE
) ? USE_OPS (stmt
) : NULL
;
1089 ptr
->vuses
= (flags
& SSA_OP_VUSE
) ? VUSE_OPS (stmt
) : NULL
;
1090 ptr
->vdefs
= (flags
& SSA_OP_VDEF
) ? VDEF_OPS (stmt
) : NULL
;
1091 ptr
->mayuses
= (flags
& SSA_OP_VMAYUSE
) ? VDEF_OPS (stmt
) : NULL
;
1096 ptr
->phi_stmt
= NULL_TREE
;
1097 ptr
->vuse_index
= 0;
1098 ptr
->mayuse_index
= 0;
1101 /* Initialize iterator PTR to the use operands in STMT based on FLAGS. Return
1103 static inline use_operand_p
1104 op_iter_init_use (ssa_op_iter
*ptr
, tree stmt
, int flags
)
1106 gcc_assert ((flags
& SSA_OP_ALL_DEFS
) == 0);
1107 op_iter_init (ptr
, stmt
, flags
);
1108 ptr
->iter_type
= ssa_op_iter_use
;
1109 return op_iter_next_use (ptr
);
1112 /* Initialize iterator PTR to the def operands in STMT based on FLAGS. Return
1114 static inline def_operand_p
1115 op_iter_init_def (ssa_op_iter
*ptr
, tree stmt
, int flags
)
1117 gcc_assert ((flags
& SSA_OP_ALL_USES
) == 0);
1118 op_iter_init (ptr
, stmt
, flags
);
1119 ptr
->iter_type
= ssa_op_iter_def
;
1120 return op_iter_next_def (ptr
);
1123 /* Initialize iterator PTR to the operands in STMT based on FLAGS. Return
1124 the first operand as a tree. */
1126 op_iter_init_tree (ssa_op_iter
*ptr
, tree stmt
, int flags
)
1128 op_iter_init (ptr
, stmt
, flags
);
1129 ptr
->iter_type
= ssa_op_iter_tree
;
1130 return op_iter_next_tree (ptr
);
1133 /* Get the next iterator mustdef value for PTR, returning the mustdef values in
1136 op_iter_next_vdef (vuse_vec_p
*use
, def_operand_p
*def
,
1139 #ifdef ENABLE_CHECKING
1140 gcc_assert (ptr
->iter_type
== ssa_op_iter_vdef
);
1144 *def
= VDEF_RESULT_PTR (ptr
->mayuses
);
1145 *use
= VDEF_VECT (ptr
->mayuses
);
1146 ptr
->mayuses
= ptr
->mayuses
->next
;
1150 *def
= NULL_DEF_OPERAND_P
;
1158 op_iter_next_mustdef (use_operand_p
*use
, def_operand_p
*def
,
1162 op_iter_next_vdef (&vp
, def
, ptr
);
1165 gcc_assert (VUSE_VECT_NUM_ELEM (*vp
) == 1);
1166 *use
= VUSE_ELEMENT_PTR (*vp
, 0);
1169 *use
= NULL_USE_OPERAND_P
;
1172 /* Initialize iterator PTR to the operands in STMT. Return the first operands
1175 op_iter_init_vdef (ssa_op_iter
*ptr
, tree stmt
, vuse_vec_p
*use
,
1178 gcc_assert (TREE_CODE (stmt
) != PHI_NODE
);
1180 op_iter_init (ptr
, stmt
, SSA_OP_VMAYUSE
);
1181 ptr
->iter_type
= ssa_op_iter_vdef
;
1182 op_iter_next_vdef (use
, def
, ptr
);
1186 /* If there is a single operand in STMT matching FLAGS, return it. Otherwise
1189 single_ssa_tree_operand (tree stmt
, int flags
)
1194 var
= op_iter_init_tree (&iter
, stmt
, flags
);
1195 if (op_iter_done (&iter
))
1197 op_iter_next_tree (&iter
);
1198 if (op_iter_done (&iter
))
1204 /* If there is a single operand in STMT matching FLAGS, return it. Otherwise
1206 static inline use_operand_p
1207 single_ssa_use_operand (tree stmt
, int flags
)
1212 var
= op_iter_init_use (&iter
, stmt
, flags
);
1213 if (op_iter_done (&iter
))
1214 return NULL_USE_OPERAND_P
;
1215 op_iter_next_use (&iter
);
1216 if (op_iter_done (&iter
))
1218 return NULL_USE_OPERAND_P
;
1223 /* If there is a single operand in STMT matching FLAGS, return it. Otherwise
1225 static inline def_operand_p
1226 single_ssa_def_operand (tree stmt
, int flags
)
1231 var
= op_iter_init_def (&iter
, stmt
, flags
);
1232 if (op_iter_done (&iter
))
1233 return NULL_DEF_OPERAND_P
;
1234 op_iter_next_def (&iter
);
1235 if (op_iter_done (&iter
))
1237 return NULL_DEF_OPERAND_P
;
1241 /* Return true if there are zero operands in STMT matching the type
1244 zero_ssa_operands (tree stmt
, int flags
)
1248 op_iter_init_tree (&iter
, stmt
, flags
);
1249 return op_iter_done (&iter
);
1253 /* Return the number of operands matching FLAGS in STMT. */
1255 num_ssa_operands (tree stmt
, int flags
)
1261 FOR_EACH_SSA_TREE_OPERAND (t
, stmt
, iter
, flags
)
1267 /* Delink all immediate_use information for STMT. */
1269 delink_stmt_imm_use (tree stmt
)
1272 use_operand_p use_p
;
1274 if (ssa_operands_active ())
1275 FOR_EACH_SSA_USE_OPERAND (use_p
, stmt
, iter
, SSA_OP_ALL_USES
)
1276 delink_imm_use (use_p
);
1280 /* This routine will compare all the operands matching FLAGS in STMT1 to those
1281 in STMT2. TRUE is returned if they are the same. STMTs can be NULL. */
1283 compare_ssa_operands_equal (tree stmt1
, tree stmt2
, int flags
)
1285 ssa_op_iter iter1
, iter2
;
1286 tree op1
= NULL_TREE
;
1287 tree op2
= NULL_TREE
;
1293 look1
= stmt1
&& stmt_ann (stmt1
);
1294 look2
= stmt2
&& stmt_ann (stmt2
);
1298 op1
= op_iter_init_tree (&iter1
, stmt1
, flags
);
1300 return op_iter_done (&iter1
);
1303 clear_and_done_ssa_iter (&iter1
);
1307 op2
= op_iter_init_tree (&iter2
, stmt2
, flags
);
1309 return op_iter_done (&iter2
);
1312 clear_and_done_ssa_iter (&iter2
);
1314 while (!op_iter_done (&iter1
) && !op_iter_done (&iter2
))
1318 op1
= op_iter_next_tree (&iter1
);
1319 op2
= op_iter_next_tree (&iter2
);
1322 return (op_iter_done (&iter1
) && op_iter_done (&iter2
));
1326 /* If there is a single DEF in the PHI node which matches FLAG, return it.
1327 Otherwise return NULL_DEF_OPERAND_P. */
1329 single_phi_def (tree stmt
, int flags
)
1331 tree def
= PHI_RESULT (stmt
);
1332 if ((flags
& SSA_OP_DEF
) && is_gimple_reg (def
))
1334 if ((flags
& SSA_OP_VIRTUAL_DEFS
) && !is_gimple_reg (def
))
1339 /* Initialize the iterator PTR for uses matching FLAGS in PHI. FLAGS should
1340 be either SSA_OP_USES or SSA_OP_VIRTUAL_USES. */
1341 static inline use_operand_p
1342 op_iter_init_phiuse (ssa_op_iter
*ptr
, tree phi
, int flags
)
1344 tree phi_def
= PHI_RESULT (phi
);
1347 clear_and_done_ssa_iter (ptr
);
1350 gcc_assert ((flags
& (SSA_OP_USE
| SSA_OP_VIRTUAL_USES
)) != 0);
1352 comp
= (is_gimple_reg (phi_def
) ? SSA_OP_USE
: SSA_OP_VIRTUAL_USES
);
1354 /* If the PHI node doesn't the operand type we care about, we're done. */
1355 if ((flags
& comp
) == 0)
1358 return NULL_USE_OPERAND_P
;
1361 ptr
->phi_stmt
= phi
;
1362 ptr
->num_phi
= PHI_NUM_ARGS (phi
);
1363 ptr
->iter_type
= ssa_op_iter_use
;
1364 return op_iter_next_use (ptr
);
1368 /* Start an iterator for a PHI definition. */
1370 static inline def_operand_p
1371 op_iter_init_phidef (ssa_op_iter
*ptr
, tree phi
, int flags
)
1373 tree phi_def
= PHI_RESULT (phi
);
1376 clear_and_done_ssa_iter (ptr
);
1379 gcc_assert ((flags
& (SSA_OP_DEF
| SSA_OP_VIRTUAL_DEFS
)) != 0);
1381 comp
= (is_gimple_reg (phi_def
) ? SSA_OP_DEF
: SSA_OP_VIRTUAL_DEFS
);
1383 /* If the PHI node doesn't the operand type we care about, we're done. */
1384 if ((flags
& comp
) == 0)
1387 return NULL_USE_OPERAND_P
;
1390 ptr
->iter_type
= ssa_op_iter_def
;
1391 /* The first call to op_iter_next_def will terminate the iterator since
1392 all the fields are NULL. Simply return the result here as the first and
1393 therefore only result. */
1394 return PHI_RESULT_PTR (phi
);
1397 /* Return true is IMM has reached the end of the immediate use stmt list. */
1400 end_imm_use_stmt_p (const imm_use_iterator
*imm
)
1402 return (imm
->imm_use
== imm
->end_p
);
1405 /* Finished the traverse of an immediate use stmt list IMM by removing the
1406 placeholder node from the list. */
1409 end_imm_use_stmt_traverse (imm_use_iterator
*imm
)
1411 delink_imm_use (&(imm
->iter_node
));
1414 /* Immediate use traversal of uses within a stmt require that all the
1415 uses on a stmt be sequentially listed. This routine is used to build up
1416 this sequential list by adding USE_P to the end of the current list
1417 currently delimited by HEAD and LAST_P. The new LAST_P value is
1420 static inline use_operand_p
1421 move_use_after_head (use_operand_p use_p
, use_operand_p head
,
1422 use_operand_p last_p
)
1424 gcc_assert (USE_FROM_PTR (use_p
) == USE_FROM_PTR (head
));
1425 /* Skip head when we find it. */
1428 /* If use_p is already linked in after last_p, continue. */
1429 if (last_p
->next
== use_p
)
1433 /* Delink from current location, and link in at last_p. */
1434 delink_imm_use (use_p
);
1435 link_imm_use_to_list (use_p
, last_p
);
1443 /* This routine will relink all uses with the same stmt as HEAD into the list
1444 immediately following HEAD for iterator IMM. */
1447 link_use_stmts_after (use_operand_p head
, imm_use_iterator
*imm
)
1449 use_operand_p use_p
;
1450 use_operand_p last_p
= head
;
1451 tree head_stmt
= USE_STMT (head
);
1452 tree use
= USE_FROM_PTR (head
);
1453 ssa_op_iter op_iter
;
1456 /* Only look at virtual or real uses, depending on the type of HEAD. */
1457 flag
= (is_gimple_reg (use
) ? SSA_OP_USE
: SSA_OP_VIRTUAL_USES
);
1459 if (TREE_CODE (head_stmt
) == PHI_NODE
)
1461 FOR_EACH_PHI_ARG (use_p
, head_stmt
, op_iter
, flag
)
1462 if (USE_FROM_PTR (use_p
) == use
)
1463 last_p
= move_use_after_head (use_p
, head
, last_p
);
1467 FOR_EACH_SSA_USE_OPERAND (use_p
, head_stmt
, op_iter
, flag
)
1468 if (USE_FROM_PTR (use_p
) == use
)
1469 last_p
= move_use_after_head (use_p
, head
, last_p
);
1471 /* LInk iter node in after last_p. */
1472 if (imm
->iter_node
.prev
!= NULL
)
1473 delink_imm_use (&imm
->iter_node
);
1474 link_imm_use_to_list (&(imm
->iter_node
), last_p
);
1477 /* Initialize IMM to traverse over uses of VAR. Return the first statement. */
1479 first_imm_use_stmt (imm_use_iterator
*imm
, tree var
)
1481 gcc_assert (TREE_CODE (var
) == SSA_NAME
);
1483 imm
->end_p
= &(SSA_NAME_IMM_USE_NODE (var
));
1484 imm
->imm_use
= imm
->end_p
->next
;
1485 imm
->next_imm_name
= NULL_USE_OPERAND_P
;
1487 /* iter_node is used as a marker within the immediate use list to indicate
1488 where the end of the current stmt's uses are. Initialize it to NULL
1489 stmt and use, which indicates a marker node. */
1490 imm
->iter_node
.prev
= NULL_USE_OPERAND_P
;
1491 imm
->iter_node
.next
= NULL_USE_OPERAND_P
;
1492 imm
->iter_node
.stmt
= NULL_TREE
;
1493 imm
->iter_node
.use
= NULL_USE_OPERAND_P
;
1495 if (end_imm_use_stmt_p (imm
))
1498 link_use_stmts_after (imm
->imm_use
, imm
);
1500 return USE_STMT (imm
->imm_use
);
1503 /* Bump IMM to the next stmt which has a use of var. */
1506 next_imm_use_stmt (imm_use_iterator
*imm
)
1508 imm
->imm_use
= imm
->iter_node
.next
;
1509 if (end_imm_use_stmt_p (imm
))
1511 if (imm
->iter_node
.prev
!= NULL
)
1512 delink_imm_use (&imm
->iter_node
);
1516 link_use_stmts_after (imm
->imm_use
, imm
);
1517 return USE_STMT (imm
->imm_use
);
1520 /* This routine will return the first use on the stmt IMM currently refers
1523 static inline use_operand_p
1524 first_imm_use_on_stmt (imm_use_iterator
*imm
)
1526 imm
->next_imm_name
= imm
->imm_use
->next
;
1527 return imm
->imm_use
;
1530 /* Return TRUE if the last use on the stmt IMM refers to has been visited. */
1533 end_imm_use_on_stmt_p (const imm_use_iterator
*imm
)
1535 return (imm
->imm_use
== &(imm
->iter_node
));
1538 /* Bump to the next use on the stmt IMM refers to, return NULL if done. */
1540 static inline use_operand_p
1541 next_imm_use_on_stmt (imm_use_iterator
*imm
)
1543 imm
->imm_use
= imm
->next_imm_name
;
1544 if (end_imm_use_on_stmt_p (imm
))
1545 return NULL_USE_OPERAND_P
;
1548 imm
->next_imm_name
= imm
->imm_use
->next
;
1549 return imm
->imm_use
;
1553 /* Return true if VAR cannot be modified by the program. */
1556 unmodifiable_var_p (const_tree var
)
1558 if (TREE_CODE (var
) == SSA_NAME
)
1559 var
= SSA_NAME_VAR (var
);
1564 return TREE_READONLY (var
) && (TREE_STATIC (var
) || DECL_EXTERNAL (var
));
1567 /* Return true if REF, an ARRAY_REF, has an INDIRECT_REF somewhere in it. */
1570 array_ref_contains_indirect_ref (const_tree ref
)
1572 gcc_assert (TREE_CODE (ref
) == ARRAY_REF
);
1575 ref
= TREE_OPERAND (ref
, 0);
1576 } while (handled_component_p (ref
));
1578 return TREE_CODE (ref
) == INDIRECT_REF
;
1581 /* Return true if REF, a handled component reference, has an ARRAY_REF
1585 ref_contains_array_ref (const_tree ref
)
1587 gcc_assert (handled_component_p (ref
));
1590 if (TREE_CODE (ref
) == ARRAY_REF
)
1592 ref
= TREE_OPERAND (ref
, 0);
1593 } while (handled_component_p (ref
));
1598 /* Return true, if the two ranges [POS1, SIZE1] and [POS2, SIZE2]
1599 overlap. SIZE1 and/or SIZE2 can be (unsigned)-1 in which case the
1600 range is open-ended. Otherwise return false. */
1603 ranges_overlap_p (unsigned HOST_WIDE_INT pos1
,
1604 unsigned HOST_WIDE_INT size1
,
1605 unsigned HOST_WIDE_INT pos2
,
1606 unsigned HOST_WIDE_INT size2
)
1609 && (size2
== (unsigned HOST_WIDE_INT
)-1
1610 || pos1
< (pos2
+ size2
)))
1613 && (size1
== (unsigned HOST_WIDE_INT
)-1
1614 || pos2
< (pos1
+ size1
)))
1620 /* Return the memory tag associated with symbol SYM. */
1623 symbol_mem_tag (tree sym
)
1625 tree tag
= get_var_ann (sym
)->symbol_mem_tag
;
1627 #if defined ENABLE_CHECKING
1629 gcc_assert (TREE_CODE (tag
) == SYMBOL_MEMORY_TAG
);
1636 /* Set the memory tag associated with symbol SYM. */
1639 set_symbol_mem_tag (tree sym
, tree tag
)
1641 #if defined ENABLE_CHECKING
1643 gcc_assert (TREE_CODE (tag
) == SYMBOL_MEMORY_TAG
);
1646 get_var_ann (sym
)->symbol_mem_tag
= tag
;
1649 /* Get the value handle of EXPR. This is the only correct way to get
1650 the value handle for a "thing". If EXPR does not have a value
1651 handle associated, it returns NULL_TREE.
1652 NB: If EXPR is min_invariant, this function is *required* to return
1656 get_value_handle (tree expr
)
1658 if (TREE_CODE (expr
) == SSA_NAME
)
1659 return SSA_NAME_VALUE (expr
);
1660 else if (DECL_P (expr
) || TREE_CODE (expr
) == TREE_LIST
1661 || TREE_CODE (expr
) == CONSTRUCTOR
)
1663 tree_ann_common_t ann
= tree_common_ann (expr
);
1664 return ((ann
) ? ann
->value_handle
: NULL_TREE
);
1666 else if (is_gimple_min_invariant (expr
))
1668 else if (EXPR_P (expr
))
1670 tree_ann_common_t ann
= tree_common_ann (expr
);
1671 return ((ann
) ? ann
->value_handle
: NULL_TREE
);
1677 /* Accessor to tree-ssa-operands.c caches. */
1678 static inline struct ssa_operands
*
1679 gimple_ssa_operands (const struct function
*fun
)
1681 return &fun
->gimple_df
->ssa_operands
;
1684 /* Map describing reference statistics for function FN. */
1685 static inline struct mem_ref_stats_d
*
1686 gimple_mem_ref_stats (const struct function
*fn
)
1688 return &fn
->gimple_df
->mem_ref_stats
;
1691 /* Given an edge_var_map V, return the PHI arg definition. */
1694 redirect_edge_var_map_def (edge_var_map
*v
)
1699 /* Given an edge_var_map V, return the PHI result. */
1702 redirect_edge_var_map_result (edge_var_map
*v
)
1708 /* Return an SSA_NAME node for variable VAR defined in statement STMT
1709 in function cfun. */
1712 make_ssa_name (tree var
, tree stmt
)
1714 return make_ssa_name_fn (cfun
, var
, stmt
);
1717 #endif /* _TREE_FLOW_INLINE_H */