1 /* Gimple IR support functions.
3 Copyright 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
4 Contributed by Aldy Hernandez <aldyh@redhat.com>
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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"
29 #include "hard-reg-set.h"
30 #include "basic-block.h"
33 #include "diagnostic.h"
34 #include "tree-flow.h"
35 #include "value-prof.h"
39 #include "langhooks.h"
41 /* Global type table. FIXME lto, it should be possible to re-use some
42 of the type hashing routines in tree.c (type_hash_canon, type_hash_lookup,
43 etc), but those assume that types were built with the various
44 build_*_type routines which is not the case with the streamer. */
45 static GTY((if_marked ("ggc_marked_p"), param_is (union tree_node
)))
47 static GTY((if_marked ("ggc_marked_p"), param_is (union tree_node
)))
48 htab_t gimple_canonical_types
;
49 static GTY((if_marked ("tree_int_map_marked_p"), param_is (struct tree_int_map
)))
50 htab_t type_hash_cache
;
52 /* Global type comparison cache. This is by TYPE_UID for space efficiency
53 and thus cannot use and does not need GC. */
54 static htab_t gtc_visited
;
55 static struct obstack gtc_ob
;
57 /* All the tuples have their operand vector (if present) at the very bottom
58 of the structure. Therefore, the offset required to find the
59 operands vector the size of the structure minus the size of the 1
60 element tree array at the end (see gimple_ops). */
61 #define DEFGSSTRUCT(SYM, STRUCT, HAS_TREE_OP) \
62 (HAS_TREE_OP ? sizeof (struct STRUCT) - sizeof (tree) : 0),
63 EXPORTED_CONST
size_t gimple_ops_offset_
[] = {
64 #include "gsstruct.def"
68 #define DEFGSSTRUCT(SYM, STRUCT, HAS_TREE_OP) sizeof(struct STRUCT),
69 static const size_t gsstruct_code_size
[] = {
70 #include "gsstruct.def"
74 #define DEFGSCODE(SYM, NAME, GSSCODE) NAME,
75 const char *const gimple_code_name
[] = {
80 #define DEFGSCODE(SYM, NAME, GSSCODE) GSSCODE,
81 EXPORTED_CONST
enum gimple_statement_structure_enum gss_for_code_
[] = {
86 #ifdef GATHER_STATISTICS
89 int gimple_alloc_counts
[(int) gimple_alloc_kind_all
];
90 int gimple_alloc_sizes
[(int) gimple_alloc_kind_all
];
92 /* Keep in sync with gimple.h:enum gimple_alloc_kind. */
93 static const char * const gimple_alloc_kind_names
[] = {
101 #endif /* GATHER_STATISTICS */
103 /* A cache of gimple_seq objects. Sequences are created and destroyed
104 fairly often during gimplification. */
105 static GTY ((deletable
)) struct gimple_seq_d
*gimple_seq_cache
;
107 /* Private API manipulation functions shared only with some
109 extern void gimple_set_stored_syms (gimple
, bitmap
, bitmap_obstack
*);
110 extern void gimple_set_loaded_syms (gimple
, bitmap
, bitmap_obstack
*);
112 /* Gimple tuple constructors.
113 Note: Any constructor taking a ``gimple_seq'' as a parameter, can
114 be passed a NULL to start with an empty sequence. */
116 /* Set the code for statement G to CODE. */
119 gimple_set_code (gimple g
, enum gimple_code code
)
121 g
->gsbase
.code
= code
;
124 /* Return the number of bytes needed to hold a GIMPLE statement with
128 gimple_size (enum gimple_code code
)
130 return gsstruct_code_size
[gss_for_code (code
)];
133 /* Allocate memory for a GIMPLE statement with code CODE and NUM_OPS
137 gimple_alloc_stat (enum gimple_code code
, unsigned num_ops MEM_STAT_DECL
)
142 size
= gimple_size (code
);
144 size
+= sizeof (tree
) * (num_ops
- 1);
146 #ifdef GATHER_STATISTICS
148 enum gimple_alloc_kind kind
= gimple_alloc_kind (code
);
149 gimple_alloc_counts
[(int) kind
]++;
150 gimple_alloc_sizes
[(int) kind
] += size
;
154 stmt
= ggc_alloc_cleared_gimple_statement_d_stat (size PASS_MEM_STAT
);
155 gimple_set_code (stmt
, code
);
156 gimple_set_num_ops (stmt
, num_ops
);
158 /* Do not call gimple_set_modified here as it has other side
159 effects and this tuple is still not completely built. */
160 stmt
->gsbase
.modified
= 1;
165 /* Set SUBCODE to be the code of the expression computed by statement G. */
168 gimple_set_subcode (gimple g
, unsigned subcode
)
170 /* We only have 16 bits for the RHS code. Assert that we are not
172 gcc_assert (subcode
< (1 << 16));
173 g
->gsbase
.subcode
= subcode
;
178 /* Build a tuple with operands. CODE is the statement to build (which
179 must be one of the GIMPLE_WITH_OPS tuples). SUBCODE is the sub-code
180 for the new tuple. NUM_OPS is the number of operands to allocate. */
182 #define gimple_build_with_ops(c, s, n) \
183 gimple_build_with_ops_stat (c, s, n MEM_STAT_INFO)
186 gimple_build_with_ops_stat (enum gimple_code code
, unsigned subcode
,
187 unsigned num_ops MEM_STAT_DECL
)
189 gimple s
= gimple_alloc_stat (code
, num_ops PASS_MEM_STAT
);
190 gimple_set_subcode (s
, subcode
);
196 /* Build a GIMPLE_RETURN statement returning RETVAL. */
199 gimple_build_return (tree retval
)
201 gimple s
= gimple_build_with_ops (GIMPLE_RETURN
, ERROR_MARK
, 1);
203 gimple_return_set_retval (s
, retval
);
207 /* Reset alias information on call S. */
210 gimple_call_reset_alias_info (gimple s
)
212 if (gimple_call_flags (s
) & ECF_CONST
)
213 memset (gimple_call_use_set (s
), 0, sizeof (struct pt_solution
));
215 pt_solution_reset (gimple_call_use_set (s
));
216 if (gimple_call_flags (s
) & (ECF_CONST
|ECF_PURE
|ECF_NOVOPS
))
217 memset (gimple_call_clobber_set (s
), 0, sizeof (struct pt_solution
));
219 pt_solution_reset (gimple_call_clobber_set (s
));
222 /* Helper for gimple_build_call, gimple_build_call_vec and
223 gimple_build_call_from_tree. Build the basic components of a
224 GIMPLE_CALL statement to function FN with NARGS arguments. */
227 gimple_build_call_1 (tree fn
, unsigned nargs
)
229 gimple s
= gimple_build_with_ops (GIMPLE_CALL
, ERROR_MARK
, nargs
+ 3);
230 if (TREE_CODE (fn
) == FUNCTION_DECL
)
231 fn
= build_fold_addr_expr (fn
);
232 gimple_set_op (s
, 1, fn
);
233 gimple_call_reset_alias_info (s
);
238 /* Build a GIMPLE_CALL statement to function FN with the arguments
239 specified in vector ARGS. */
242 gimple_build_call_vec (tree fn
, VEC(tree
, heap
) *args
)
245 unsigned nargs
= VEC_length (tree
, args
);
246 gimple call
= gimple_build_call_1 (fn
, nargs
);
248 for (i
= 0; i
< nargs
; i
++)
249 gimple_call_set_arg (call
, i
, VEC_index (tree
, args
, i
));
255 /* Build a GIMPLE_CALL statement to function FN. NARGS is the number of
256 arguments. The ... are the arguments. */
259 gimple_build_call (tree fn
, unsigned nargs
, ...)
265 gcc_assert (TREE_CODE (fn
) == FUNCTION_DECL
|| is_gimple_call_addr (fn
));
267 call
= gimple_build_call_1 (fn
, nargs
);
269 va_start (ap
, nargs
);
270 for (i
= 0; i
< nargs
; i
++)
271 gimple_call_set_arg (call
, i
, va_arg (ap
, tree
));
278 /* Build a GIMPLE_CALL statement from CALL_EXPR T. Note that T is
279 assumed to be in GIMPLE form already. Minimal checking is done of
283 gimple_build_call_from_tree (tree t
)
287 tree fndecl
= get_callee_fndecl (t
);
289 gcc_assert (TREE_CODE (t
) == CALL_EXPR
);
291 nargs
= call_expr_nargs (t
);
292 call
= gimple_build_call_1 (fndecl
? fndecl
: CALL_EXPR_FN (t
), nargs
);
294 for (i
= 0; i
< nargs
; i
++)
295 gimple_call_set_arg (call
, i
, CALL_EXPR_ARG (t
, i
));
297 gimple_set_block (call
, TREE_BLOCK (t
));
299 /* Carry all the CALL_EXPR flags to the new GIMPLE_CALL. */
300 gimple_call_set_chain (call
, CALL_EXPR_STATIC_CHAIN (t
));
301 gimple_call_set_tail (call
, CALL_EXPR_TAILCALL (t
));
302 gimple_call_set_cannot_inline (call
, CALL_CANNOT_INLINE_P (t
));
303 gimple_call_set_return_slot_opt (call
, CALL_EXPR_RETURN_SLOT_OPT (t
));
304 gimple_call_set_from_thunk (call
, CALL_FROM_THUNK_P (t
));
305 gimple_call_set_va_arg_pack (call
, CALL_EXPR_VA_ARG_PACK (t
));
306 gimple_call_set_nothrow (call
, TREE_NOTHROW (t
));
307 gimple_set_no_warning (call
, TREE_NO_WARNING (t
));
313 /* Extract the operands and code for expression EXPR into *SUBCODE_P,
314 *OP1_P, *OP2_P and *OP3_P respectively. */
317 extract_ops_from_tree_1 (tree expr
, enum tree_code
*subcode_p
, tree
*op1_p
,
318 tree
*op2_p
, tree
*op3_p
)
320 enum gimple_rhs_class grhs_class
;
322 *subcode_p
= TREE_CODE (expr
);
323 grhs_class
= get_gimple_rhs_class (*subcode_p
);
325 if (grhs_class
== GIMPLE_TERNARY_RHS
)
327 *op1_p
= TREE_OPERAND (expr
, 0);
328 *op2_p
= TREE_OPERAND (expr
, 1);
329 *op3_p
= TREE_OPERAND (expr
, 2);
331 else if (grhs_class
== GIMPLE_BINARY_RHS
)
333 *op1_p
= TREE_OPERAND (expr
, 0);
334 *op2_p
= TREE_OPERAND (expr
, 1);
337 else if (grhs_class
== GIMPLE_UNARY_RHS
)
339 *op1_p
= TREE_OPERAND (expr
, 0);
343 else if (grhs_class
== GIMPLE_SINGLE_RHS
)
354 /* Build a GIMPLE_ASSIGN statement.
356 LHS of the assignment.
357 RHS of the assignment which can be unary or binary. */
360 gimple_build_assign_stat (tree lhs
, tree rhs MEM_STAT_DECL
)
362 enum tree_code subcode
;
365 extract_ops_from_tree_1 (rhs
, &subcode
, &op1
, &op2
, &op3
);
366 return gimple_build_assign_with_ops_stat (subcode
, lhs
, op1
, op2
, op3
371 /* Build a GIMPLE_ASSIGN statement with sub-code SUBCODE and operands
372 OP1 and OP2. If OP2 is NULL then SUBCODE must be of class
373 GIMPLE_UNARY_RHS or GIMPLE_SINGLE_RHS. */
376 gimple_build_assign_with_ops_stat (enum tree_code subcode
, tree lhs
, tree op1
,
377 tree op2
, tree op3 MEM_STAT_DECL
)
382 /* Need 1 operand for LHS and 1 or 2 for the RHS (depending on the
384 num_ops
= get_gimple_rhs_num_ops (subcode
) + 1;
386 p
= gimple_build_with_ops_stat (GIMPLE_ASSIGN
, (unsigned)subcode
, num_ops
388 gimple_assign_set_lhs (p
, lhs
);
389 gimple_assign_set_rhs1 (p
, op1
);
392 gcc_assert (num_ops
> 2);
393 gimple_assign_set_rhs2 (p
, op2
);
398 gcc_assert (num_ops
> 3);
399 gimple_assign_set_rhs3 (p
, op3
);
406 /* Build a new GIMPLE_ASSIGN tuple and append it to the end of *SEQ_P.
408 DST/SRC are the destination and source respectively. You can pass
409 ungimplified trees in DST or SRC, in which case they will be
410 converted to a gimple operand if necessary.
412 This function returns the newly created GIMPLE_ASSIGN tuple. */
415 gimplify_assign (tree dst
, tree src
, gimple_seq
*seq_p
)
417 tree t
= build2 (MODIFY_EXPR
, TREE_TYPE (dst
), dst
, src
);
418 gimplify_and_add (t
, seq_p
);
420 return gimple_seq_last_stmt (*seq_p
);
424 /* Build a GIMPLE_COND statement.
426 PRED is the condition used to compare LHS and the RHS.
427 T_LABEL is the label to jump to if the condition is true.
428 F_LABEL is the label to jump to otherwise. */
431 gimple_build_cond (enum tree_code pred_code
, tree lhs
, tree rhs
,
432 tree t_label
, tree f_label
)
436 gcc_assert (TREE_CODE_CLASS (pred_code
) == tcc_comparison
);
437 p
= gimple_build_with_ops (GIMPLE_COND
, pred_code
, 4);
438 gimple_cond_set_lhs (p
, lhs
);
439 gimple_cond_set_rhs (p
, rhs
);
440 gimple_cond_set_true_label (p
, t_label
);
441 gimple_cond_set_false_label (p
, f_label
);
446 /* Extract operands for a GIMPLE_COND statement out of COND_EXPR tree COND. */
449 gimple_cond_get_ops_from_tree (tree cond
, enum tree_code
*code_p
,
450 tree
*lhs_p
, tree
*rhs_p
)
452 gcc_assert (TREE_CODE_CLASS (TREE_CODE (cond
)) == tcc_comparison
453 || TREE_CODE (cond
) == TRUTH_NOT_EXPR
454 || is_gimple_min_invariant (cond
)
455 || SSA_VAR_P (cond
));
457 extract_ops_from_tree (cond
, code_p
, lhs_p
, rhs_p
);
459 /* Canonicalize conditionals of the form 'if (!VAL)'. */
460 if (*code_p
== TRUTH_NOT_EXPR
)
463 gcc_assert (*lhs_p
&& *rhs_p
== NULL_TREE
);
464 *rhs_p
= build_zero_cst (TREE_TYPE (*lhs_p
));
466 /* Canonicalize conditionals of the form 'if (VAL)' */
467 else if (TREE_CODE_CLASS (*code_p
) != tcc_comparison
)
470 gcc_assert (*lhs_p
&& *rhs_p
== NULL_TREE
);
471 *rhs_p
= build_zero_cst (TREE_TYPE (*lhs_p
));
476 /* Build a GIMPLE_COND statement from the conditional expression tree
477 COND. T_LABEL and F_LABEL are as in gimple_build_cond. */
480 gimple_build_cond_from_tree (tree cond
, tree t_label
, tree f_label
)
485 gimple_cond_get_ops_from_tree (cond
, &code
, &lhs
, &rhs
);
486 return gimple_build_cond (code
, lhs
, rhs
, t_label
, f_label
);
489 /* Set code, lhs, and rhs of a GIMPLE_COND from a suitable
490 boolean expression tree COND. */
493 gimple_cond_set_condition_from_tree (gimple stmt
, tree cond
)
498 gimple_cond_get_ops_from_tree (cond
, &code
, &lhs
, &rhs
);
499 gimple_cond_set_condition (stmt
, code
, lhs
, rhs
);
502 /* Build a GIMPLE_LABEL statement for LABEL. */
505 gimple_build_label (tree label
)
507 gimple p
= gimple_build_with_ops (GIMPLE_LABEL
, ERROR_MARK
, 1);
508 gimple_label_set_label (p
, label
);
512 /* Build a GIMPLE_GOTO statement to label DEST. */
515 gimple_build_goto (tree dest
)
517 gimple p
= gimple_build_with_ops (GIMPLE_GOTO
, ERROR_MARK
, 1);
518 gimple_goto_set_dest (p
, dest
);
523 /* Build a GIMPLE_NOP statement. */
526 gimple_build_nop (void)
528 return gimple_alloc (GIMPLE_NOP
, 0);
532 /* Build a GIMPLE_BIND statement.
533 VARS are the variables in BODY.
534 BLOCK is the containing block. */
537 gimple_build_bind (tree vars
, gimple_seq body
, tree block
)
539 gimple p
= gimple_alloc (GIMPLE_BIND
, 0);
540 gimple_bind_set_vars (p
, vars
);
542 gimple_bind_set_body (p
, body
);
544 gimple_bind_set_block (p
, block
);
548 /* Helper function to set the simple fields of a asm stmt.
550 STRING is a pointer to a string that is the asm blocks assembly code.
551 NINPUT is the number of register inputs.
552 NOUTPUT is the number of register outputs.
553 NCLOBBERS is the number of clobbered registers.
557 gimple_build_asm_1 (const char *string
, unsigned ninputs
, unsigned noutputs
,
558 unsigned nclobbers
, unsigned nlabels
)
561 int size
= strlen (string
);
563 /* ASMs with labels cannot have outputs. This should have been
564 enforced by the front end. */
565 gcc_assert (nlabels
== 0 || noutputs
== 0);
567 p
= gimple_build_with_ops (GIMPLE_ASM
, ERROR_MARK
,
568 ninputs
+ noutputs
+ nclobbers
+ nlabels
);
570 p
->gimple_asm
.ni
= ninputs
;
571 p
->gimple_asm
.no
= noutputs
;
572 p
->gimple_asm
.nc
= nclobbers
;
573 p
->gimple_asm
.nl
= nlabels
;
574 p
->gimple_asm
.string
= ggc_alloc_string (string
, size
);
576 #ifdef GATHER_STATISTICS
577 gimple_alloc_sizes
[(int) gimple_alloc_kind (GIMPLE_ASM
)] += size
;
583 /* Build a GIMPLE_ASM statement.
585 STRING is the assembly code.
586 NINPUT is the number of register inputs.
587 NOUTPUT is the number of register outputs.
588 NCLOBBERS is the number of clobbered registers.
589 INPUTS is a vector of the input register parameters.
590 OUTPUTS is a vector of the output register parameters.
591 CLOBBERS is a vector of the clobbered register parameters.
592 LABELS is a vector of destination labels. */
595 gimple_build_asm_vec (const char *string
, VEC(tree
,gc
)* inputs
,
596 VEC(tree
,gc
)* outputs
, VEC(tree
,gc
)* clobbers
,
597 VEC(tree
,gc
)* labels
)
602 p
= gimple_build_asm_1 (string
,
603 VEC_length (tree
, inputs
),
604 VEC_length (tree
, outputs
),
605 VEC_length (tree
, clobbers
),
606 VEC_length (tree
, labels
));
608 for (i
= 0; i
< VEC_length (tree
, inputs
); i
++)
609 gimple_asm_set_input_op (p
, i
, VEC_index (tree
, inputs
, i
));
611 for (i
= 0; i
< VEC_length (tree
, outputs
); i
++)
612 gimple_asm_set_output_op (p
, i
, VEC_index (tree
, outputs
, i
));
614 for (i
= 0; i
< VEC_length (tree
, clobbers
); i
++)
615 gimple_asm_set_clobber_op (p
, i
, VEC_index (tree
, clobbers
, i
));
617 for (i
= 0; i
< VEC_length (tree
, labels
); i
++)
618 gimple_asm_set_label_op (p
, i
, VEC_index (tree
, labels
, i
));
623 /* Build a GIMPLE_CATCH statement.
625 TYPES are the catch types.
626 HANDLER is the exception handler. */
629 gimple_build_catch (tree types
, gimple_seq handler
)
631 gimple p
= gimple_alloc (GIMPLE_CATCH
, 0);
632 gimple_catch_set_types (p
, types
);
634 gimple_catch_set_handler (p
, handler
);
639 /* Build a GIMPLE_EH_FILTER statement.
641 TYPES are the filter's types.
642 FAILURE is the filter's failure action. */
645 gimple_build_eh_filter (tree types
, gimple_seq failure
)
647 gimple p
= gimple_alloc (GIMPLE_EH_FILTER
, 0);
648 gimple_eh_filter_set_types (p
, types
);
650 gimple_eh_filter_set_failure (p
, failure
);
655 /* Build a GIMPLE_EH_MUST_NOT_THROW statement. */
658 gimple_build_eh_must_not_throw (tree decl
)
660 gimple p
= gimple_alloc (GIMPLE_EH_MUST_NOT_THROW
, 0);
662 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
);
663 gcc_assert (flags_from_decl_or_type (decl
) & ECF_NORETURN
);
664 gimple_eh_must_not_throw_set_fndecl (p
, decl
);
669 /* Build a GIMPLE_TRY statement.
671 EVAL is the expression to evaluate.
672 CLEANUP is the cleanup expression.
673 KIND is either GIMPLE_TRY_CATCH or GIMPLE_TRY_FINALLY depending on
674 whether this is a try/catch or a try/finally respectively. */
677 gimple_build_try (gimple_seq eval
, gimple_seq cleanup
,
678 enum gimple_try_flags kind
)
682 gcc_assert (kind
== GIMPLE_TRY_CATCH
|| kind
== GIMPLE_TRY_FINALLY
);
683 p
= gimple_alloc (GIMPLE_TRY
, 0);
684 gimple_set_subcode (p
, kind
);
686 gimple_try_set_eval (p
, eval
);
688 gimple_try_set_cleanup (p
, cleanup
);
693 /* Construct a GIMPLE_WITH_CLEANUP_EXPR statement.
695 CLEANUP is the cleanup expression. */
698 gimple_build_wce (gimple_seq cleanup
)
700 gimple p
= gimple_alloc (GIMPLE_WITH_CLEANUP_EXPR
, 0);
702 gimple_wce_set_cleanup (p
, cleanup
);
708 /* Build a GIMPLE_RESX statement. */
711 gimple_build_resx (int region
)
713 gimple p
= gimple_build_with_ops (GIMPLE_RESX
, ERROR_MARK
, 0);
714 p
->gimple_eh_ctrl
.region
= region
;
719 /* The helper for constructing a gimple switch statement.
720 INDEX is the switch's index.
721 NLABELS is the number of labels in the switch excluding the default.
722 DEFAULT_LABEL is the default label for the switch statement. */
725 gimple_build_switch_nlabels (unsigned nlabels
, tree index
, tree default_label
)
727 /* nlabels + 1 default label + 1 index. */
728 gimple p
= gimple_build_with_ops (GIMPLE_SWITCH
, ERROR_MARK
,
729 1 + (default_label
!= NULL
) + nlabels
);
730 gimple_switch_set_index (p
, index
);
732 gimple_switch_set_default_label (p
, default_label
);
737 /* Build a GIMPLE_SWITCH statement.
739 INDEX is the switch's index.
740 NLABELS is the number of labels in the switch excluding the DEFAULT_LABEL.
741 ... are the labels excluding the default. */
744 gimple_build_switch (unsigned nlabels
, tree index
, tree default_label
, ...)
748 gimple p
= gimple_build_switch_nlabels (nlabels
, index
, default_label
);
750 /* Store the rest of the labels. */
751 va_start (al
, default_label
);
752 offset
= (default_label
!= NULL
);
753 for (i
= 0; i
< nlabels
; i
++)
754 gimple_switch_set_label (p
, i
+ offset
, va_arg (al
, tree
));
761 /* Build a GIMPLE_SWITCH statement.
763 INDEX is the switch's index.
764 DEFAULT_LABEL is the default label
765 ARGS is a vector of labels excluding the default. */
768 gimple_build_switch_vec (tree index
, tree default_label
, VEC(tree
, heap
) *args
)
770 unsigned i
, offset
, nlabels
= VEC_length (tree
, args
);
771 gimple p
= gimple_build_switch_nlabels (nlabels
, index
, default_label
);
773 /* Copy the labels from the vector to the switch statement. */
774 offset
= (default_label
!= NULL
);
775 for (i
= 0; i
< nlabels
; i
++)
776 gimple_switch_set_label (p
, i
+ offset
, VEC_index (tree
, args
, i
));
781 /* Build a GIMPLE_EH_DISPATCH statement. */
784 gimple_build_eh_dispatch (int region
)
786 gimple p
= gimple_build_with_ops (GIMPLE_EH_DISPATCH
, ERROR_MARK
, 0);
787 p
->gimple_eh_ctrl
.region
= region
;
791 /* Build a new GIMPLE_DEBUG_BIND statement.
793 VAR is bound to VALUE; block and location are taken from STMT. */
796 gimple_build_debug_bind_stat (tree var
, tree value
, gimple stmt MEM_STAT_DECL
)
798 gimple p
= gimple_build_with_ops_stat (GIMPLE_DEBUG
,
799 (unsigned)GIMPLE_DEBUG_BIND
, 2
802 gimple_debug_bind_set_var (p
, var
);
803 gimple_debug_bind_set_value (p
, value
);
806 gimple_set_block (p
, gimple_block (stmt
));
807 gimple_set_location (p
, gimple_location (stmt
));
814 /* Build a GIMPLE_OMP_CRITICAL statement.
816 BODY is the sequence of statements for which only one thread can execute.
817 NAME is optional identifier for this critical block. */
820 gimple_build_omp_critical (gimple_seq body
, tree name
)
822 gimple p
= gimple_alloc (GIMPLE_OMP_CRITICAL
, 0);
823 gimple_omp_critical_set_name (p
, name
);
825 gimple_omp_set_body (p
, body
);
830 /* Build a GIMPLE_OMP_FOR statement.
832 BODY is sequence of statements inside the for loop.
833 CLAUSES, are any of the OMP loop construct's clauses: private, firstprivate,
834 lastprivate, reductions, ordered, schedule, and nowait.
835 COLLAPSE is the collapse count.
836 PRE_BODY is the sequence of statements that are loop invariant. */
839 gimple_build_omp_for (gimple_seq body
, tree clauses
, size_t collapse
,
842 gimple p
= gimple_alloc (GIMPLE_OMP_FOR
, 0);
844 gimple_omp_set_body (p
, body
);
845 gimple_omp_for_set_clauses (p
, clauses
);
846 p
->gimple_omp_for
.collapse
= collapse
;
847 p
->gimple_omp_for
.iter
848 = ggc_alloc_cleared_vec_gimple_omp_for_iter (collapse
);
850 gimple_omp_for_set_pre_body (p
, pre_body
);
856 /* Build a GIMPLE_OMP_PARALLEL statement.
858 BODY is sequence of statements which are executed in parallel.
859 CLAUSES, are the OMP parallel construct's clauses.
860 CHILD_FN is the function created for the parallel threads to execute.
861 DATA_ARG are the shared data argument(s). */
864 gimple_build_omp_parallel (gimple_seq body
, tree clauses
, tree child_fn
,
867 gimple p
= gimple_alloc (GIMPLE_OMP_PARALLEL
, 0);
869 gimple_omp_set_body (p
, body
);
870 gimple_omp_parallel_set_clauses (p
, clauses
);
871 gimple_omp_parallel_set_child_fn (p
, child_fn
);
872 gimple_omp_parallel_set_data_arg (p
, data_arg
);
878 /* Build a GIMPLE_OMP_TASK statement.
880 BODY is sequence of statements which are executed by the explicit task.
881 CLAUSES, are the OMP parallel construct's clauses.
882 CHILD_FN is the function created for the parallel threads to execute.
883 DATA_ARG are the shared data argument(s).
884 COPY_FN is the optional function for firstprivate initialization.
885 ARG_SIZE and ARG_ALIGN are size and alignment of the data block. */
888 gimple_build_omp_task (gimple_seq body
, tree clauses
, tree child_fn
,
889 tree data_arg
, tree copy_fn
, tree arg_size
,
892 gimple p
= gimple_alloc (GIMPLE_OMP_TASK
, 0);
894 gimple_omp_set_body (p
, body
);
895 gimple_omp_task_set_clauses (p
, clauses
);
896 gimple_omp_task_set_child_fn (p
, child_fn
);
897 gimple_omp_task_set_data_arg (p
, data_arg
);
898 gimple_omp_task_set_copy_fn (p
, copy_fn
);
899 gimple_omp_task_set_arg_size (p
, arg_size
);
900 gimple_omp_task_set_arg_align (p
, arg_align
);
906 /* Build a GIMPLE_OMP_SECTION statement for a sections statement.
908 BODY is the sequence of statements in the section. */
911 gimple_build_omp_section (gimple_seq body
)
913 gimple p
= gimple_alloc (GIMPLE_OMP_SECTION
, 0);
915 gimple_omp_set_body (p
, body
);
921 /* Build a GIMPLE_OMP_MASTER statement.
923 BODY is the sequence of statements to be executed by just the master. */
926 gimple_build_omp_master (gimple_seq body
)
928 gimple p
= gimple_alloc (GIMPLE_OMP_MASTER
, 0);
930 gimple_omp_set_body (p
, body
);
936 /* Build a GIMPLE_OMP_CONTINUE statement.
938 CONTROL_DEF is the definition of the control variable.
939 CONTROL_USE is the use of the control variable. */
942 gimple_build_omp_continue (tree control_def
, tree control_use
)
944 gimple p
= gimple_alloc (GIMPLE_OMP_CONTINUE
, 0);
945 gimple_omp_continue_set_control_def (p
, control_def
);
946 gimple_omp_continue_set_control_use (p
, control_use
);
950 /* Build a GIMPLE_OMP_ORDERED statement.
952 BODY is the sequence of statements inside a loop that will executed in
956 gimple_build_omp_ordered (gimple_seq body
)
958 gimple p
= gimple_alloc (GIMPLE_OMP_ORDERED
, 0);
960 gimple_omp_set_body (p
, body
);
966 /* Build a GIMPLE_OMP_RETURN statement.
967 WAIT_P is true if this is a non-waiting return. */
970 gimple_build_omp_return (bool wait_p
)
972 gimple p
= gimple_alloc (GIMPLE_OMP_RETURN
, 0);
974 gimple_omp_return_set_nowait (p
);
980 /* Build a GIMPLE_OMP_SECTIONS statement.
982 BODY is a sequence of section statements.
983 CLAUSES are any of the OMP sections contsruct's clauses: private,
984 firstprivate, lastprivate, reduction, and nowait. */
987 gimple_build_omp_sections (gimple_seq body
, tree clauses
)
989 gimple p
= gimple_alloc (GIMPLE_OMP_SECTIONS
, 0);
991 gimple_omp_set_body (p
, body
);
992 gimple_omp_sections_set_clauses (p
, clauses
);
998 /* Build a GIMPLE_OMP_SECTIONS_SWITCH. */
1001 gimple_build_omp_sections_switch (void)
1003 return gimple_alloc (GIMPLE_OMP_SECTIONS_SWITCH
, 0);
1007 /* Build a GIMPLE_OMP_SINGLE statement.
1009 BODY is the sequence of statements that will be executed once.
1010 CLAUSES are any of the OMP single construct's clauses: private, firstprivate,
1011 copyprivate, nowait. */
1014 gimple_build_omp_single (gimple_seq body
, tree clauses
)
1016 gimple p
= gimple_alloc (GIMPLE_OMP_SINGLE
, 0);
1018 gimple_omp_set_body (p
, body
);
1019 gimple_omp_single_set_clauses (p
, clauses
);
1025 /* Build a GIMPLE_OMP_ATOMIC_LOAD statement. */
1028 gimple_build_omp_atomic_load (tree lhs
, tree rhs
)
1030 gimple p
= gimple_alloc (GIMPLE_OMP_ATOMIC_LOAD
, 0);
1031 gimple_omp_atomic_load_set_lhs (p
, lhs
);
1032 gimple_omp_atomic_load_set_rhs (p
, rhs
);
1036 /* Build a GIMPLE_OMP_ATOMIC_STORE statement.
1038 VAL is the value we are storing. */
1041 gimple_build_omp_atomic_store (tree val
)
1043 gimple p
= gimple_alloc (GIMPLE_OMP_ATOMIC_STORE
, 0);
1044 gimple_omp_atomic_store_set_val (p
, val
);
1048 /* Build a GIMPLE_PREDICT statement. PREDICT is one of the predictors from
1049 predict.def, OUTCOME is NOT_TAKEN or TAKEN. */
1052 gimple_build_predict (enum br_predictor predictor
, enum prediction outcome
)
1054 gimple p
= gimple_alloc (GIMPLE_PREDICT
, 0);
1055 /* Ensure all the predictors fit into the lower bits of the subcode. */
1056 gcc_assert ((int) END_PREDICTORS
<= GF_PREDICT_TAKEN
);
1057 gimple_predict_set_predictor (p
, predictor
);
1058 gimple_predict_set_outcome (p
, outcome
);
1062 #if defined ENABLE_GIMPLE_CHECKING
1063 /* Complain of a gimple type mismatch and die. */
1066 gimple_check_failed (const_gimple gs
, const char *file
, int line
,
1067 const char *function
, enum gimple_code code
,
1068 enum tree_code subcode
)
1070 internal_error ("gimple check: expected %s(%s), have %s(%s) in %s, at %s:%d",
1071 gimple_code_name
[code
],
1072 tree_code_name
[subcode
],
1073 gimple_code_name
[gimple_code (gs
)],
1074 gs
->gsbase
.subcode
> 0
1075 ? tree_code_name
[gs
->gsbase
.subcode
]
1077 function
, trim_filename (file
), line
);
1079 #endif /* ENABLE_GIMPLE_CHECKING */
1082 /* Allocate a new GIMPLE sequence in GC memory and return it. If
1083 there are free sequences in GIMPLE_SEQ_CACHE return one of those
1087 gimple_seq_alloc (void)
1089 gimple_seq seq
= gimple_seq_cache
;
1092 gimple_seq_cache
= gimple_seq_cache
->next_free
;
1093 gcc_assert (gimple_seq_cache
!= seq
);
1094 memset (seq
, 0, sizeof (*seq
));
1098 seq
= ggc_alloc_cleared_gimple_seq_d ();
1099 #ifdef GATHER_STATISTICS
1100 gimple_alloc_counts
[(int) gimple_alloc_kind_seq
]++;
1101 gimple_alloc_sizes
[(int) gimple_alloc_kind_seq
] += sizeof (*seq
);
1108 /* Return SEQ to the free pool of GIMPLE sequences. */
1111 gimple_seq_free (gimple_seq seq
)
1116 gcc_assert (gimple_seq_first (seq
) == NULL
);
1117 gcc_assert (gimple_seq_last (seq
) == NULL
);
1119 /* If this triggers, it's a sign that the same list is being freed
1121 gcc_assert (seq
!= gimple_seq_cache
|| gimple_seq_cache
== NULL
);
1123 /* Add SEQ to the pool of free sequences. */
1124 seq
->next_free
= gimple_seq_cache
;
1125 gimple_seq_cache
= seq
;
1129 /* Link gimple statement GS to the end of the sequence *SEQ_P. If
1130 *SEQ_P is NULL, a new sequence is allocated. */
1133 gimple_seq_add_stmt (gimple_seq
*seq_p
, gimple gs
)
1135 gimple_stmt_iterator si
;
1141 *seq_p
= gimple_seq_alloc ();
1143 si
= gsi_last (*seq_p
);
1144 gsi_insert_after (&si
, gs
, GSI_NEW_STMT
);
1148 /* Append sequence SRC to the end of sequence *DST_P. If *DST_P is
1149 NULL, a new sequence is allocated. */
1152 gimple_seq_add_seq (gimple_seq
*dst_p
, gimple_seq src
)
1154 gimple_stmt_iterator si
;
1160 *dst_p
= gimple_seq_alloc ();
1162 si
= gsi_last (*dst_p
);
1163 gsi_insert_seq_after (&si
, src
, GSI_NEW_STMT
);
1167 /* Helper function of empty_body_p. Return true if STMT is an empty
1171 empty_stmt_p (gimple stmt
)
1173 if (gimple_code (stmt
) == GIMPLE_NOP
)
1175 if (gimple_code (stmt
) == GIMPLE_BIND
)
1176 return empty_body_p (gimple_bind_body (stmt
));
1181 /* Return true if BODY contains nothing but empty statements. */
1184 empty_body_p (gimple_seq body
)
1186 gimple_stmt_iterator i
;
1188 if (gimple_seq_empty_p (body
))
1190 for (i
= gsi_start (body
); !gsi_end_p (i
); gsi_next (&i
))
1191 if (!empty_stmt_p (gsi_stmt (i
))
1192 && !is_gimple_debug (gsi_stmt (i
)))
1199 /* Perform a deep copy of sequence SRC and return the result. */
1202 gimple_seq_copy (gimple_seq src
)
1204 gimple_stmt_iterator gsi
;
1205 gimple_seq new_seq
= gimple_seq_alloc ();
1208 for (gsi
= gsi_start (src
); !gsi_end_p (gsi
); gsi_next (&gsi
))
1210 stmt
= gimple_copy (gsi_stmt (gsi
));
1211 gimple_seq_add_stmt (&new_seq
, stmt
);
1218 /* Walk all the statements in the sequence SEQ calling walk_gimple_stmt
1219 on each one. WI is as in walk_gimple_stmt.
1221 If walk_gimple_stmt returns non-NULL, the walk is stopped, the
1222 value is stored in WI->CALLBACK_RESULT and the statement that
1223 produced the value is returned.
1225 Otherwise, all the statements are walked and NULL returned. */
1228 walk_gimple_seq (gimple_seq seq
, walk_stmt_fn callback_stmt
,
1229 walk_tree_fn callback_op
, struct walk_stmt_info
*wi
)
1231 gimple_stmt_iterator gsi
;
1233 for (gsi
= gsi_start (seq
); !gsi_end_p (gsi
); gsi_next (&gsi
))
1235 tree ret
= walk_gimple_stmt (&gsi
, callback_stmt
, callback_op
, wi
);
1238 /* If CALLBACK_STMT or CALLBACK_OP return a value, WI must exist
1241 wi
->callback_result
= ret
;
1242 return gsi_stmt (gsi
);
1247 wi
->callback_result
= NULL_TREE
;
1253 /* Helper function for walk_gimple_stmt. Walk operands of a GIMPLE_ASM. */
1256 walk_gimple_asm (gimple stmt
, walk_tree_fn callback_op
,
1257 struct walk_stmt_info
*wi
)
1261 const char **oconstraints
;
1263 const char *constraint
;
1264 bool allows_mem
, allows_reg
, is_inout
;
1266 noutputs
= gimple_asm_noutputs (stmt
);
1267 oconstraints
= (const char **) alloca ((noutputs
) * sizeof (const char *));
1272 for (i
= 0; i
< noutputs
; i
++)
1274 op
= gimple_asm_output_op (stmt
, i
);
1275 constraint
= TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (op
)));
1276 oconstraints
[i
] = constraint
;
1277 parse_output_constraint (&constraint
, i
, 0, 0, &allows_mem
, &allows_reg
,
1280 wi
->val_only
= (allows_reg
|| !allows_mem
);
1281 ret
= walk_tree (&TREE_VALUE (op
), callback_op
, wi
, NULL
);
1286 n
= gimple_asm_ninputs (stmt
);
1287 for (i
= 0; i
< n
; i
++)
1289 op
= gimple_asm_input_op (stmt
, i
);
1290 constraint
= TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (op
)));
1291 parse_input_constraint (&constraint
, 0, 0, noutputs
, 0,
1292 oconstraints
, &allows_mem
, &allows_reg
);
1295 wi
->val_only
= (allows_reg
|| !allows_mem
);
1296 /* Although input "m" is not really a LHS, we need a lvalue. */
1297 wi
->is_lhs
= !wi
->val_only
;
1299 ret
= walk_tree (&TREE_VALUE (op
), callback_op
, wi
, NULL
);
1307 wi
->val_only
= true;
1310 n
= gimple_asm_nlabels (stmt
);
1311 for (i
= 0; i
< n
; i
++)
1313 op
= gimple_asm_label_op (stmt
, i
);
1314 ret
= walk_tree (&TREE_VALUE (op
), callback_op
, wi
, NULL
);
1323 /* Helper function of WALK_GIMPLE_STMT. Walk every tree operand in
1324 STMT. CALLBACK_OP and WI are as in WALK_GIMPLE_STMT.
1326 CALLBACK_OP is called on each operand of STMT via walk_tree.
1327 Additional parameters to walk_tree must be stored in WI. For each operand
1328 OP, walk_tree is called as:
1330 walk_tree (&OP, CALLBACK_OP, WI, WI->PSET)
1332 If CALLBACK_OP returns non-NULL for an operand, the remaining
1333 operands are not scanned.
1335 The return value is that returned by the last call to walk_tree, or
1336 NULL_TREE if no CALLBACK_OP is specified. */
1339 walk_gimple_op (gimple stmt
, walk_tree_fn callback_op
,
1340 struct walk_stmt_info
*wi
)
1342 struct pointer_set_t
*pset
= (wi
) ? wi
->pset
: NULL
;
1344 tree ret
= NULL_TREE
;
1346 switch (gimple_code (stmt
))
1349 /* Walk the RHS operands. If the LHS is of a non-renamable type or
1350 is a register variable, we may use a COMPONENT_REF on the RHS. */
1353 tree lhs
= gimple_assign_lhs (stmt
);
1355 = (is_gimple_reg_type (TREE_TYPE (lhs
)) && !is_gimple_reg (lhs
))
1356 || !gimple_assign_single_p (stmt
);
1359 for (i
= 1; i
< gimple_num_ops (stmt
); i
++)
1361 ret
= walk_tree (gimple_op_ptr (stmt
, i
), callback_op
, wi
,
1367 /* Walk the LHS. If the RHS is appropriate for a memory, we
1368 may use a COMPONENT_REF on the LHS. */
1371 /* If the RHS has more than 1 operand, it is not appropriate
1373 wi
->val_only
= !is_gimple_mem_rhs (gimple_assign_rhs1 (stmt
))
1374 || !gimple_assign_single_p (stmt
);
1378 ret
= walk_tree (gimple_op_ptr (stmt
, 0), callback_op
, wi
, pset
);
1384 wi
->val_only
= true;
1393 wi
->val_only
= true;
1396 ret
= walk_tree (gimple_call_chain_ptr (stmt
), callback_op
, wi
, pset
);
1400 ret
= walk_tree (gimple_call_fn_ptr (stmt
), callback_op
, wi
, pset
);
1404 for (i
= 0; i
< gimple_call_num_args (stmt
); i
++)
1407 wi
->val_only
= is_gimple_reg_type (gimple_call_arg (stmt
, i
));
1408 ret
= walk_tree (gimple_call_arg_ptr (stmt
, i
), callback_op
, wi
,
1414 if (gimple_call_lhs (stmt
))
1419 wi
->val_only
= is_gimple_reg_type (gimple_call_lhs (stmt
));
1422 ret
= walk_tree (gimple_call_lhs_ptr (stmt
), callback_op
, wi
, pset
);
1430 wi
->val_only
= true;
1435 ret
= walk_tree (gimple_catch_types_ptr (stmt
), callback_op
, wi
,
1441 case GIMPLE_EH_FILTER
:
1442 ret
= walk_tree (gimple_eh_filter_types_ptr (stmt
), callback_op
, wi
,
1449 ret
= walk_gimple_asm (stmt
, callback_op
, wi
);
1454 case GIMPLE_OMP_CONTINUE
:
1455 ret
= walk_tree (gimple_omp_continue_control_def_ptr (stmt
),
1456 callback_op
, wi
, pset
);
1460 ret
= walk_tree (gimple_omp_continue_control_use_ptr (stmt
),
1461 callback_op
, wi
, pset
);
1466 case GIMPLE_OMP_CRITICAL
:
1467 ret
= walk_tree (gimple_omp_critical_name_ptr (stmt
), callback_op
, wi
,
1473 case GIMPLE_OMP_FOR
:
1474 ret
= walk_tree (gimple_omp_for_clauses_ptr (stmt
), callback_op
, wi
,
1478 for (i
= 0; i
< gimple_omp_for_collapse (stmt
); i
++)
1480 ret
= walk_tree (gimple_omp_for_index_ptr (stmt
, i
), callback_op
,
1484 ret
= walk_tree (gimple_omp_for_initial_ptr (stmt
, i
), callback_op
,
1488 ret
= walk_tree (gimple_omp_for_final_ptr (stmt
, i
), callback_op
,
1492 ret
= walk_tree (gimple_omp_for_incr_ptr (stmt
, i
), callback_op
,
1499 case GIMPLE_OMP_PARALLEL
:
1500 ret
= walk_tree (gimple_omp_parallel_clauses_ptr (stmt
), callback_op
,
1504 ret
= walk_tree (gimple_omp_parallel_child_fn_ptr (stmt
), callback_op
,
1508 ret
= walk_tree (gimple_omp_parallel_data_arg_ptr (stmt
), callback_op
,
1514 case GIMPLE_OMP_TASK
:
1515 ret
= walk_tree (gimple_omp_task_clauses_ptr (stmt
), callback_op
,
1519 ret
= walk_tree (gimple_omp_task_child_fn_ptr (stmt
), callback_op
,
1523 ret
= walk_tree (gimple_omp_task_data_arg_ptr (stmt
), callback_op
,
1527 ret
= walk_tree (gimple_omp_task_copy_fn_ptr (stmt
), callback_op
,
1531 ret
= walk_tree (gimple_omp_task_arg_size_ptr (stmt
), callback_op
,
1535 ret
= walk_tree (gimple_omp_task_arg_align_ptr (stmt
), callback_op
,
1541 case GIMPLE_OMP_SECTIONS
:
1542 ret
= walk_tree (gimple_omp_sections_clauses_ptr (stmt
), callback_op
,
1547 ret
= walk_tree (gimple_omp_sections_control_ptr (stmt
), callback_op
,
1554 case GIMPLE_OMP_SINGLE
:
1555 ret
= walk_tree (gimple_omp_single_clauses_ptr (stmt
), callback_op
, wi
,
1561 case GIMPLE_OMP_ATOMIC_LOAD
:
1562 ret
= walk_tree (gimple_omp_atomic_load_lhs_ptr (stmt
), callback_op
, wi
,
1567 ret
= walk_tree (gimple_omp_atomic_load_rhs_ptr (stmt
), callback_op
, wi
,
1573 case GIMPLE_OMP_ATOMIC_STORE
:
1574 ret
= walk_tree (gimple_omp_atomic_store_val_ptr (stmt
), callback_op
,
1580 /* Tuples that do not have operands. */
1583 case GIMPLE_OMP_RETURN
:
1584 case GIMPLE_PREDICT
:
1589 enum gimple_statement_structure_enum gss
;
1590 gss
= gimple_statement_structure (stmt
);
1591 if (gss
== GSS_WITH_OPS
|| gss
== GSS_WITH_MEM_OPS
)
1592 for (i
= 0; i
< gimple_num_ops (stmt
); i
++)
1594 ret
= walk_tree (gimple_op_ptr (stmt
, i
), callback_op
, wi
, pset
);
1606 /* Walk the current statement in GSI (optionally using traversal state
1607 stored in WI). If WI is NULL, no state is kept during traversal.
1608 The callback CALLBACK_STMT is called. If CALLBACK_STMT indicates
1609 that it has handled all the operands of the statement, its return
1610 value is returned. Otherwise, the return value from CALLBACK_STMT
1611 is discarded and its operands are scanned.
1613 If CALLBACK_STMT is NULL or it didn't handle the operands,
1614 CALLBACK_OP is called on each operand of the statement via
1615 walk_gimple_op. If walk_gimple_op returns non-NULL for any
1616 operand, the remaining operands are not scanned. In this case, the
1617 return value from CALLBACK_OP is returned.
1619 In any other case, NULL_TREE is returned. */
1622 walk_gimple_stmt (gimple_stmt_iterator
*gsi
, walk_stmt_fn callback_stmt
,
1623 walk_tree_fn callback_op
, struct walk_stmt_info
*wi
)
1627 gimple stmt
= gsi_stmt (*gsi
);
1632 if (wi
&& wi
->want_locations
&& gimple_has_location (stmt
))
1633 input_location
= gimple_location (stmt
);
1637 /* Invoke the statement callback. Return if the callback handled
1638 all of STMT operands by itself. */
1641 bool handled_ops
= false;
1642 tree_ret
= callback_stmt (gsi
, &handled_ops
, wi
);
1646 /* If CALLBACK_STMT did not handle operands, it should not have
1647 a value to return. */
1648 gcc_assert (tree_ret
== NULL
);
1650 /* Re-read stmt in case the callback changed it. */
1651 stmt
= gsi_stmt (*gsi
);
1654 /* If CALLBACK_OP is defined, invoke it on every operand of STMT. */
1657 tree_ret
= walk_gimple_op (stmt
, callback_op
, wi
);
1662 /* If STMT can have statements inside (e.g. GIMPLE_BIND), walk them. */
1663 switch (gimple_code (stmt
))
1666 ret
= walk_gimple_seq (gimple_bind_body (stmt
), callback_stmt
,
1669 return wi
->callback_result
;
1673 ret
= walk_gimple_seq (gimple_catch_handler (stmt
), callback_stmt
,
1676 return wi
->callback_result
;
1679 case GIMPLE_EH_FILTER
:
1680 ret
= walk_gimple_seq (gimple_eh_filter_failure (stmt
), callback_stmt
,
1683 return wi
->callback_result
;
1687 ret
= walk_gimple_seq (gimple_try_eval (stmt
), callback_stmt
, callback_op
,
1690 return wi
->callback_result
;
1692 ret
= walk_gimple_seq (gimple_try_cleanup (stmt
), callback_stmt
,
1695 return wi
->callback_result
;
1698 case GIMPLE_OMP_FOR
:
1699 ret
= walk_gimple_seq (gimple_omp_for_pre_body (stmt
), callback_stmt
,
1702 return wi
->callback_result
;
1705 case GIMPLE_OMP_CRITICAL
:
1706 case GIMPLE_OMP_MASTER
:
1707 case GIMPLE_OMP_ORDERED
:
1708 case GIMPLE_OMP_SECTION
:
1709 case GIMPLE_OMP_PARALLEL
:
1710 case GIMPLE_OMP_TASK
:
1711 case GIMPLE_OMP_SECTIONS
:
1712 case GIMPLE_OMP_SINGLE
:
1713 ret
= walk_gimple_seq (gimple_omp_body (stmt
), callback_stmt
, callback_op
,
1716 return wi
->callback_result
;
1719 case GIMPLE_WITH_CLEANUP_EXPR
:
1720 ret
= walk_gimple_seq (gimple_wce_cleanup (stmt
), callback_stmt
,
1723 return wi
->callback_result
;
1727 gcc_assert (!gimple_has_substatements (stmt
));
1735 /* Set sequence SEQ to be the GIMPLE body for function FN. */
1738 gimple_set_body (tree fndecl
, gimple_seq seq
)
1740 struct function
*fn
= DECL_STRUCT_FUNCTION (fndecl
);
1743 /* If FNDECL still does not have a function structure associated
1744 with it, then it does not make sense for it to receive a
1746 gcc_assert (seq
== NULL
);
1749 fn
->gimple_body
= seq
;
1753 /* Return the body of GIMPLE statements for function FN. After the
1754 CFG pass, the function body doesn't exist anymore because it has
1755 been split up into basic blocks. In this case, it returns
1759 gimple_body (tree fndecl
)
1761 struct function
*fn
= DECL_STRUCT_FUNCTION (fndecl
);
1762 return fn
? fn
->gimple_body
: NULL
;
1765 /* Return true when FNDECL has Gimple body either in unlowered
1768 gimple_has_body_p (tree fndecl
)
1770 struct function
*fn
= DECL_STRUCT_FUNCTION (fndecl
);
1771 return (gimple_body (fndecl
) || (fn
&& fn
->cfg
));
1774 /* Detect flags from a GIMPLE_CALL. This is just like
1775 call_expr_flags, but for gimple tuples. */
1778 gimple_call_flags (const_gimple stmt
)
1781 tree decl
= gimple_call_fndecl (stmt
);
1785 flags
= flags_from_decl_or_type (decl
);
1788 t
= TREE_TYPE (gimple_call_fn (stmt
));
1789 if (t
&& TREE_CODE (t
) == POINTER_TYPE
)
1790 flags
= flags_from_decl_or_type (TREE_TYPE (t
));
1795 if (stmt
->gsbase
.subcode
& GF_CALL_NOTHROW
)
1796 flags
|= ECF_NOTHROW
;
1801 /* Detects argument flags for argument number ARG on call STMT. */
1804 gimple_call_arg_flags (const_gimple stmt
, unsigned arg
)
1806 tree type
= TREE_TYPE (TREE_TYPE (gimple_call_fn (stmt
)));
1807 tree attr
= lookup_attribute ("fn spec", TYPE_ATTRIBUTES (type
));
1811 attr
= TREE_VALUE (TREE_VALUE (attr
));
1812 if (1 + arg
>= (unsigned) TREE_STRING_LENGTH (attr
))
1815 switch (TREE_STRING_POINTER (attr
)[1 + arg
])
1822 return EAF_DIRECT
| EAF_NOCLOBBER
| EAF_NOESCAPE
;
1825 return EAF_NOCLOBBER
| EAF_NOESCAPE
;
1828 return EAF_DIRECT
| EAF_NOESCAPE
;
1831 return EAF_NOESCAPE
;
1839 /* Detects return flags for the call STMT. */
1842 gimple_call_return_flags (const_gimple stmt
)
1845 tree attr
= NULL_TREE
;
1847 if (gimple_call_flags (stmt
) & ECF_MALLOC
)
1850 type
= TREE_TYPE (TREE_TYPE (gimple_call_fn (stmt
)));
1851 attr
= lookup_attribute ("fn spec", TYPE_ATTRIBUTES (type
));
1855 attr
= TREE_VALUE (TREE_VALUE (attr
));
1856 if (TREE_STRING_LENGTH (attr
) < 1)
1859 switch (TREE_STRING_POINTER (attr
)[0])
1865 return ERF_RETURNS_ARG
| (TREE_STRING_POINTER (attr
)[0] - '1');
1876 /* Return true if GS is a copy assignment. */
1879 gimple_assign_copy_p (gimple gs
)
1881 return gimple_code (gs
) == GIMPLE_ASSIGN
1882 && get_gimple_rhs_class (gimple_assign_rhs_code (gs
))
1883 == GIMPLE_SINGLE_RHS
1884 && is_gimple_val (gimple_op (gs
, 1));
1888 /* Return true if GS is a SSA_NAME copy assignment. */
1891 gimple_assign_ssa_name_copy_p (gimple gs
)
1893 return (gimple_code (gs
) == GIMPLE_ASSIGN
1894 && (get_gimple_rhs_class (gimple_assign_rhs_code (gs
))
1895 == GIMPLE_SINGLE_RHS
)
1896 && TREE_CODE (gimple_assign_lhs (gs
)) == SSA_NAME
1897 && TREE_CODE (gimple_assign_rhs1 (gs
)) == SSA_NAME
);
1901 /* Return true if GS is an assignment with a singleton RHS, i.e.,
1902 there is no operator associated with the assignment itself.
1903 Unlike gimple_assign_copy_p, this predicate returns true for
1904 any RHS operand, including those that perform an operation
1905 and do not have the semantics of a copy, such as COND_EXPR. */
1908 gimple_assign_single_p (gimple gs
)
1910 return (gimple_code (gs
) == GIMPLE_ASSIGN
1911 && get_gimple_rhs_class (gimple_assign_rhs_code (gs
))
1912 == GIMPLE_SINGLE_RHS
);
1915 /* Return true if GS is an assignment with a unary RHS, but the
1916 operator has no effect on the assigned value. The logic is adapted
1917 from STRIP_NOPS. This predicate is intended to be used in tuplifying
1918 instances in which STRIP_NOPS was previously applied to the RHS of
1921 NOTE: In the use cases that led to the creation of this function
1922 and of gimple_assign_single_p, it is typical to test for either
1923 condition and to proceed in the same manner. In each case, the
1924 assigned value is represented by the single RHS operand of the
1925 assignment. I suspect there may be cases where gimple_assign_copy_p,
1926 gimple_assign_single_p, or equivalent logic is used where a similar
1927 treatment of unary NOPs is appropriate. */
1930 gimple_assign_unary_nop_p (gimple gs
)
1932 return (gimple_code (gs
) == GIMPLE_ASSIGN
1933 && (CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (gs
))
1934 || gimple_assign_rhs_code (gs
) == NON_LVALUE_EXPR
)
1935 && gimple_assign_rhs1 (gs
) != error_mark_node
1936 && (TYPE_MODE (TREE_TYPE (gimple_assign_lhs (gs
)))
1937 == TYPE_MODE (TREE_TYPE (gimple_assign_rhs1 (gs
)))));
1940 /* Set BB to be the basic block holding G. */
1943 gimple_set_bb (gimple stmt
, basic_block bb
)
1945 stmt
->gsbase
.bb
= bb
;
1947 /* If the statement is a label, add the label to block-to-labels map
1948 so that we can speed up edge creation for GIMPLE_GOTOs. */
1949 if (cfun
->cfg
&& gimple_code (stmt
) == GIMPLE_LABEL
)
1954 t
= gimple_label_label (stmt
);
1955 uid
= LABEL_DECL_UID (t
);
1958 unsigned old_len
= VEC_length (basic_block
, label_to_block_map
);
1959 LABEL_DECL_UID (t
) = uid
= cfun
->cfg
->last_label_uid
++;
1960 if (old_len
<= (unsigned) uid
)
1962 unsigned new_len
= 3 * uid
/ 2 + 1;
1964 VEC_safe_grow_cleared (basic_block
, gc
, label_to_block_map
,
1969 VEC_replace (basic_block
, label_to_block_map
, uid
, bb
);
1974 /* Modify the RHS of the assignment pointed-to by GSI using the
1975 operands in the expression tree EXPR.
1977 NOTE: The statement pointed-to by GSI may be reallocated if it
1978 did not have enough operand slots.
1980 This function is useful to convert an existing tree expression into
1981 the flat representation used for the RHS of a GIMPLE assignment.
1982 It will reallocate memory as needed to expand or shrink the number
1983 of operand slots needed to represent EXPR.
1985 NOTE: If you find yourself building a tree and then calling this
1986 function, you are most certainly doing it the slow way. It is much
1987 better to build a new assignment or to use the function
1988 gimple_assign_set_rhs_with_ops, which does not require an
1989 expression tree to be built. */
1992 gimple_assign_set_rhs_from_tree (gimple_stmt_iterator
*gsi
, tree expr
)
1994 enum tree_code subcode
;
1997 extract_ops_from_tree_1 (expr
, &subcode
, &op1
, &op2
, &op3
);
1998 gimple_assign_set_rhs_with_ops_1 (gsi
, subcode
, op1
, op2
, op3
);
2002 /* Set the RHS of assignment statement pointed-to by GSI to CODE with
2003 operands OP1, OP2 and OP3.
2005 NOTE: The statement pointed-to by GSI may be reallocated if it
2006 did not have enough operand slots. */
2009 gimple_assign_set_rhs_with_ops_1 (gimple_stmt_iterator
*gsi
, enum tree_code code
,
2010 tree op1
, tree op2
, tree op3
)
2012 unsigned new_rhs_ops
= get_gimple_rhs_num_ops (code
);
2013 gimple stmt
= gsi_stmt (*gsi
);
2015 /* If the new CODE needs more operands, allocate a new statement. */
2016 if (gimple_num_ops (stmt
) < new_rhs_ops
+ 1)
2018 tree lhs
= gimple_assign_lhs (stmt
);
2019 gimple new_stmt
= gimple_alloc (gimple_code (stmt
), new_rhs_ops
+ 1);
2020 memcpy (new_stmt
, stmt
, gimple_size (gimple_code (stmt
)));
2021 gsi_replace (gsi
, new_stmt
, true);
2024 /* The LHS needs to be reset as this also changes the SSA name
2026 gimple_assign_set_lhs (stmt
, lhs
);
2029 gimple_set_num_ops (stmt
, new_rhs_ops
+ 1);
2030 gimple_set_subcode (stmt
, code
);
2031 gimple_assign_set_rhs1 (stmt
, op1
);
2032 if (new_rhs_ops
> 1)
2033 gimple_assign_set_rhs2 (stmt
, op2
);
2034 if (new_rhs_ops
> 2)
2035 gimple_assign_set_rhs3 (stmt
, op3
);
2039 /* Return the LHS of a statement that performs an assignment,
2040 either a GIMPLE_ASSIGN or a GIMPLE_CALL. Returns NULL_TREE
2041 for a call to a function that returns no value, or for a
2042 statement other than an assignment or a call. */
2045 gimple_get_lhs (const_gimple stmt
)
2047 enum gimple_code code
= gimple_code (stmt
);
2049 if (code
== GIMPLE_ASSIGN
)
2050 return gimple_assign_lhs (stmt
);
2051 else if (code
== GIMPLE_CALL
)
2052 return gimple_call_lhs (stmt
);
2058 /* Set the LHS of a statement that performs an assignment,
2059 either a GIMPLE_ASSIGN or a GIMPLE_CALL. */
2062 gimple_set_lhs (gimple stmt
, tree lhs
)
2064 enum gimple_code code
= gimple_code (stmt
);
2066 if (code
== GIMPLE_ASSIGN
)
2067 gimple_assign_set_lhs (stmt
, lhs
);
2068 else if (code
== GIMPLE_CALL
)
2069 gimple_call_set_lhs (stmt
, lhs
);
2074 /* Replace the LHS of STMT, an assignment, either a GIMPLE_ASSIGN or a
2075 GIMPLE_CALL, with NLHS, in preparation for modifying the RHS to an
2076 expression with a different value.
2078 This will update any annotations (say debug bind stmts) referring
2079 to the original LHS, so that they use the RHS instead. This is
2080 done even if NLHS and LHS are the same, for it is understood that
2081 the RHS will be modified afterwards, and NLHS will not be assigned
2082 an equivalent value.
2084 Adjusting any non-annotation uses of the LHS, if needed, is a
2085 responsibility of the caller.
2087 The effect of this call should be pretty much the same as that of
2088 inserting a copy of STMT before STMT, and then removing the
2089 original stmt, at which time gsi_remove() would have update
2090 annotations, but using this function saves all the inserting,
2091 copying and removing. */
2094 gimple_replace_lhs (gimple stmt
, tree nlhs
)
2096 if (MAY_HAVE_DEBUG_STMTS
)
2098 tree lhs
= gimple_get_lhs (stmt
);
2100 gcc_assert (SSA_NAME_DEF_STMT (lhs
) == stmt
);
2102 insert_debug_temp_for_var_def (NULL
, lhs
);
2105 gimple_set_lhs (stmt
, nlhs
);
2108 /* Return a deep copy of statement STMT. All the operands from STMT
2109 are reallocated and copied using unshare_expr. The DEF, USE, VDEF
2110 and VUSE operand arrays are set to empty in the new copy. */
2113 gimple_copy (gimple stmt
)
2115 enum gimple_code code
= gimple_code (stmt
);
2116 unsigned num_ops
= gimple_num_ops (stmt
);
2117 gimple copy
= gimple_alloc (code
, num_ops
);
2120 /* Shallow copy all the fields from STMT. */
2121 memcpy (copy
, stmt
, gimple_size (code
));
2123 /* If STMT has sub-statements, deep-copy them as well. */
2124 if (gimple_has_substatements (stmt
))
2129 switch (gimple_code (stmt
))
2132 new_seq
= gimple_seq_copy (gimple_bind_body (stmt
));
2133 gimple_bind_set_body (copy
, new_seq
);
2134 gimple_bind_set_vars (copy
, unshare_expr (gimple_bind_vars (stmt
)));
2135 gimple_bind_set_block (copy
, gimple_bind_block (stmt
));
2139 new_seq
= gimple_seq_copy (gimple_catch_handler (stmt
));
2140 gimple_catch_set_handler (copy
, new_seq
);
2141 t
= unshare_expr (gimple_catch_types (stmt
));
2142 gimple_catch_set_types (copy
, t
);
2145 case GIMPLE_EH_FILTER
:
2146 new_seq
= gimple_seq_copy (gimple_eh_filter_failure (stmt
));
2147 gimple_eh_filter_set_failure (copy
, new_seq
);
2148 t
= unshare_expr (gimple_eh_filter_types (stmt
));
2149 gimple_eh_filter_set_types (copy
, t
);
2153 new_seq
= gimple_seq_copy (gimple_try_eval (stmt
));
2154 gimple_try_set_eval (copy
, new_seq
);
2155 new_seq
= gimple_seq_copy (gimple_try_cleanup (stmt
));
2156 gimple_try_set_cleanup (copy
, new_seq
);
2159 case GIMPLE_OMP_FOR
:
2160 new_seq
= gimple_seq_copy (gimple_omp_for_pre_body (stmt
));
2161 gimple_omp_for_set_pre_body (copy
, new_seq
);
2162 t
= unshare_expr (gimple_omp_for_clauses (stmt
));
2163 gimple_omp_for_set_clauses (copy
, t
);
2164 copy
->gimple_omp_for
.iter
2165 = ggc_alloc_vec_gimple_omp_for_iter
2166 (gimple_omp_for_collapse (stmt
));
2167 for (i
= 0; i
< gimple_omp_for_collapse (stmt
); i
++)
2169 gimple_omp_for_set_cond (copy
, i
,
2170 gimple_omp_for_cond (stmt
, i
));
2171 gimple_omp_for_set_index (copy
, i
,
2172 gimple_omp_for_index (stmt
, i
));
2173 t
= unshare_expr (gimple_omp_for_initial (stmt
, i
));
2174 gimple_omp_for_set_initial (copy
, i
, t
);
2175 t
= unshare_expr (gimple_omp_for_final (stmt
, i
));
2176 gimple_omp_for_set_final (copy
, i
, t
);
2177 t
= unshare_expr (gimple_omp_for_incr (stmt
, i
));
2178 gimple_omp_for_set_incr (copy
, i
, t
);
2182 case GIMPLE_OMP_PARALLEL
:
2183 t
= unshare_expr (gimple_omp_parallel_clauses (stmt
));
2184 gimple_omp_parallel_set_clauses (copy
, t
);
2185 t
= unshare_expr (gimple_omp_parallel_child_fn (stmt
));
2186 gimple_omp_parallel_set_child_fn (copy
, t
);
2187 t
= unshare_expr (gimple_omp_parallel_data_arg (stmt
));
2188 gimple_omp_parallel_set_data_arg (copy
, t
);
2191 case GIMPLE_OMP_TASK
:
2192 t
= unshare_expr (gimple_omp_task_clauses (stmt
));
2193 gimple_omp_task_set_clauses (copy
, t
);
2194 t
= unshare_expr (gimple_omp_task_child_fn (stmt
));
2195 gimple_omp_task_set_child_fn (copy
, t
);
2196 t
= unshare_expr (gimple_omp_task_data_arg (stmt
));
2197 gimple_omp_task_set_data_arg (copy
, t
);
2198 t
= unshare_expr (gimple_omp_task_copy_fn (stmt
));
2199 gimple_omp_task_set_copy_fn (copy
, t
);
2200 t
= unshare_expr (gimple_omp_task_arg_size (stmt
));
2201 gimple_omp_task_set_arg_size (copy
, t
);
2202 t
= unshare_expr (gimple_omp_task_arg_align (stmt
));
2203 gimple_omp_task_set_arg_align (copy
, t
);
2206 case GIMPLE_OMP_CRITICAL
:
2207 t
= unshare_expr (gimple_omp_critical_name (stmt
));
2208 gimple_omp_critical_set_name (copy
, t
);
2211 case GIMPLE_OMP_SECTIONS
:
2212 t
= unshare_expr (gimple_omp_sections_clauses (stmt
));
2213 gimple_omp_sections_set_clauses (copy
, t
);
2214 t
= unshare_expr (gimple_omp_sections_control (stmt
));
2215 gimple_omp_sections_set_control (copy
, t
);
2218 case GIMPLE_OMP_SINGLE
:
2219 case GIMPLE_OMP_SECTION
:
2220 case GIMPLE_OMP_MASTER
:
2221 case GIMPLE_OMP_ORDERED
:
2223 new_seq
= gimple_seq_copy (gimple_omp_body (stmt
));
2224 gimple_omp_set_body (copy
, new_seq
);
2227 case GIMPLE_WITH_CLEANUP_EXPR
:
2228 new_seq
= gimple_seq_copy (gimple_wce_cleanup (stmt
));
2229 gimple_wce_set_cleanup (copy
, new_seq
);
2237 /* Make copy of operands. */
2240 for (i
= 0; i
< num_ops
; i
++)
2241 gimple_set_op (copy
, i
, unshare_expr (gimple_op (stmt
, i
)));
2243 /* Clear out SSA operand vectors on COPY. */
2244 if (gimple_has_ops (stmt
))
2246 gimple_set_def_ops (copy
, NULL
);
2247 gimple_set_use_ops (copy
, NULL
);
2250 if (gimple_has_mem_ops (stmt
))
2252 gimple_set_vdef (copy
, gimple_vdef (stmt
));
2253 gimple_set_vuse (copy
, gimple_vuse (stmt
));
2256 /* SSA operands need to be updated. */
2257 gimple_set_modified (copy
, true);
2264 /* Set the MODIFIED flag to MODIFIEDP, iff the gimple statement G has
2265 a MODIFIED field. */
2268 gimple_set_modified (gimple s
, bool modifiedp
)
2270 if (gimple_has_ops (s
))
2272 s
->gsbase
.modified
= (unsigned) modifiedp
;
2276 && is_gimple_call (s
)
2277 && gimple_call_noreturn_p (s
))
2278 VEC_safe_push (gimple
, gc
, MODIFIED_NORETURN_CALLS (cfun
), s
);
2283 /* Return true if statement S has side-effects. We consider a
2284 statement to have side effects if:
2286 - It is a GIMPLE_CALL not marked with ECF_PURE or ECF_CONST.
2287 - Any of its operands are marked TREE_THIS_VOLATILE or TREE_SIDE_EFFECTS. */
2290 gimple_has_side_effects (const_gimple s
)
2294 if (is_gimple_debug (s
))
2297 /* We don't have to scan the arguments to check for
2298 volatile arguments, though, at present, we still
2299 do a scan to check for TREE_SIDE_EFFECTS. */
2300 if (gimple_has_volatile_ops (s
))
2303 if (is_gimple_call (s
))
2305 unsigned nargs
= gimple_call_num_args (s
);
2307 if (!(gimple_call_flags (s
) & (ECF_CONST
| ECF_PURE
)))
2309 else if (gimple_call_flags (s
) & ECF_LOOPING_CONST_OR_PURE
)
2310 /* An infinite loop is considered a side effect. */
2313 if (gimple_call_lhs (s
)
2314 && TREE_SIDE_EFFECTS (gimple_call_lhs (s
)))
2316 gcc_assert (gimple_has_volatile_ops (s
));
2320 if (TREE_SIDE_EFFECTS (gimple_call_fn (s
)))
2323 for (i
= 0; i
< nargs
; i
++)
2324 if (TREE_SIDE_EFFECTS (gimple_call_arg (s
, i
)))
2326 gcc_assert (gimple_has_volatile_ops (s
));
2334 for (i
= 0; i
< gimple_num_ops (s
); i
++)
2335 if (TREE_SIDE_EFFECTS (gimple_op (s
, i
)))
2337 gcc_assert (gimple_has_volatile_ops (s
));
2345 /* Return true if the RHS of statement S has side effects.
2346 We may use it to determine if it is admissable to replace
2347 an assignment or call with a copy of a previously-computed
2348 value. In such cases, side-effects due the the LHS are
2352 gimple_rhs_has_side_effects (const_gimple s
)
2356 if (is_gimple_call (s
))
2358 unsigned nargs
= gimple_call_num_args (s
);
2360 if (!(gimple_call_flags (s
) & (ECF_CONST
| ECF_PURE
)))
2363 /* We cannot use gimple_has_volatile_ops here,
2364 because we must ignore a volatile LHS. */
2365 if (TREE_SIDE_EFFECTS (gimple_call_fn (s
))
2366 || TREE_THIS_VOLATILE (gimple_call_fn (s
)))
2368 gcc_assert (gimple_has_volatile_ops (s
));
2372 for (i
= 0; i
< nargs
; i
++)
2373 if (TREE_SIDE_EFFECTS (gimple_call_arg (s
, i
))
2374 || TREE_THIS_VOLATILE (gimple_call_arg (s
, i
)))
2379 else if (is_gimple_assign (s
))
2381 /* Skip the first operand, the LHS. */
2382 for (i
= 1; i
< gimple_num_ops (s
); i
++)
2383 if (TREE_SIDE_EFFECTS (gimple_op (s
, i
))
2384 || TREE_THIS_VOLATILE (gimple_op (s
, i
)))
2386 gcc_assert (gimple_has_volatile_ops (s
));
2390 else if (is_gimple_debug (s
))
2394 /* For statements without an LHS, examine all arguments. */
2395 for (i
= 0; i
< gimple_num_ops (s
); i
++)
2396 if (TREE_SIDE_EFFECTS (gimple_op (s
, i
))
2397 || TREE_THIS_VOLATILE (gimple_op (s
, i
)))
2399 gcc_assert (gimple_has_volatile_ops (s
));
2407 /* Helper for gimple_could_trap_p and gimple_assign_rhs_could_trap_p.
2408 Return true if S can trap. When INCLUDE_MEM is true, check whether
2409 the memory operations could trap. When INCLUDE_STORES is true and
2410 S is a GIMPLE_ASSIGN, the LHS of the assignment is also checked. */
2413 gimple_could_trap_p_1 (gimple s
, bool include_mem
, bool include_stores
)
2415 tree t
, div
= NULL_TREE
;
2420 unsigned i
, start
= (is_gimple_assign (s
) && !include_stores
) ? 1 : 0;
2422 for (i
= start
; i
< gimple_num_ops (s
); i
++)
2423 if (tree_could_trap_p (gimple_op (s
, i
)))
2427 switch (gimple_code (s
))
2430 return gimple_asm_volatile_p (s
);
2433 t
= gimple_call_fndecl (s
);
2434 /* Assume that calls to weak functions may trap. */
2435 if (!t
|| !DECL_P (t
) || DECL_WEAK (t
))
2440 t
= gimple_expr_type (s
);
2441 op
= gimple_assign_rhs_code (s
);
2442 if (get_gimple_rhs_class (op
) == GIMPLE_BINARY_RHS
)
2443 div
= gimple_assign_rhs2 (s
);
2444 return (operation_could_trap_p (op
, FLOAT_TYPE_P (t
),
2445 (INTEGRAL_TYPE_P (t
)
2446 && TYPE_OVERFLOW_TRAPS (t
)),
2456 /* Return true if statement S can trap. */
2459 gimple_could_trap_p (gimple s
)
2461 return gimple_could_trap_p_1 (s
, true, true);
2464 /* Return true if RHS of a GIMPLE_ASSIGN S can trap. */
2467 gimple_assign_rhs_could_trap_p (gimple s
)
2469 gcc_assert (is_gimple_assign (s
));
2470 return gimple_could_trap_p_1 (s
, true, false);
2474 /* Print debugging information for gimple stmts generated. */
2477 dump_gimple_statistics (void)
2479 #ifdef GATHER_STATISTICS
2480 int i
, total_tuples
= 0, total_bytes
= 0;
2482 fprintf (stderr
, "\nGIMPLE statements\n");
2483 fprintf (stderr
, "Kind Stmts Bytes\n");
2484 fprintf (stderr
, "---------------------------------------\n");
2485 for (i
= 0; i
< (int) gimple_alloc_kind_all
; ++i
)
2487 fprintf (stderr
, "%-20s %7d %10d\n", gimple_alloc_kind_names
[i
],
2488 gimple_alloc_counts
[i
], gimple_alloc_sizes
[i
]);
2489 total_tuples
+= gimple_alloc_counts
[i
];
2490 total_bytes
+= gimple_alloc_sizes
[i
];
2492 fprintf (stderr
, "---------------------------------------\n");
2493 fprintf (stderr
, "%-20s %7d %10d\n", "Total", total_tuples
, total_bytes
);
2494 fprintf (stderr
, "---------------------------------------\n");
2496 fprintf (stderr
, "No gimple statistics\n");
2501 /* Return the number of operands needed on the RHS of a GIMPLE
2502 assignment for an expression with tree code CODE. */
2505 get_gimple_rhs_num_ops (enum tree_code code
)
2507 enum gimple_rhs_class rhs_class
= get_gimple_rhs_class (code
);
2509 if (rhs_class
== GIMPLE_UNARY_RHS
|| rhs_class
== GIMPLE_SINGLE_RHS
)
2511 else if (rhs_class
== GIMPLE_BINARY_RHS
)
2513 else if (rhs_class
== GIMPLE_TERNARY_RHS
)
2519 #define DEFTREECODE(SYM, STRING, TYPE, NARGS) \
2521 ((TYPE) == tcc_unary ? GIMPLE_UNARY_RHS \
2522 : ((TYPE) == tcc_binary \
2523 || (TYPE) == tcc_comparison) ? GIMPLE_BINARY_RHS \
2524 : ((TYPE) == tcc_constant \
2525 || (TYPE) == tcc_declaration \
2526 || (TYPE) == tcc_reference) ? GIMPLE_SINGLE_RHS \
2527 : ((SYM) == TRUTH_AND_EXPR \
2528 || (SYM) == TRUTH_OR_EXPR \
2529 || (SYM) == TRUTH_XOR_EXPR) ? GIMPLE_BINARY_RHS \
2530 : (SYM) == TRUTH_NOT_EXPR ? GIMPLE_UNARY_RHS \
2531 : ((SYM) == WIDEN_MULT_PLUS_EXPR \
2532 || (SYM) == WIDEN_MULT_MINUS_EXPR) ? GIMPLE_TERNARY_RHS \
2533 : ((SYM) == COND_EXPR \
2534 || (SYM) == CONSTRUCTOR \
2535 || (SYM) == OBJ_TYPE_REF \
2536 || (SYM) == ASSERT_EXPR \
2537 || (SYM) == ADDR_EXPR \
2538 || (SYM) == WITH_SIZE_EXPR \
2539 || (SYM) == SSA_NAME \
2540 || (SYM) == POLYNOMIAL_CHREC \
2541 || (SYM) == DOT_PROD_EXPR \
2542 || (SYM) == VEC_COND_EXPR \
2543 || (SYM) == REALIGN_LOAD_EXPR) ? GIMPLE_SINGLE_RHS \
2544 : GIMPLE_INVALID_RHS),
2545 #define END_OF_BASE_TREE_CODES (unsigned char) GIMPLE_INVALID_RHS,
2547 const unsigned char gimple_rhs_class_table
[] = {
2548 #include "all-tree.def"
2552 #undef END_OF_BASE_TREE_CODES
2554 /* For the definitive definition of GIMPLE, see doc/tree-ssa.texi. */
2556 /* Validation of GIMPLE expressions. */
2558 /* Returns true iff T is a valid RHS for an assignment to a renamed
2559 user -- or front-end generated artificial -- variable. */
2562 is_gimple_reg_rhs (tree t
)
2564 return get_gimple_rhs_class (TREE_CODE (t
)) != GIMPLE_INVALID_RHS
;
2567 /* Returns true iff T is a valid RHS for an assignment to an un-renamed
2568 LHS, or for a call argument. */
2571 is_gimple_mem_rhs (tree t
)
2573 /* If we're dealing with a renamable type, either source or dest must be
2574 a renamed variable. */
2575 if (is_gimple_reg_type (TREE_TYPE (t
)))
2576 return is_gimple_val (t
);
2578 return is_gimple_val (t
) || is_gimple_lvalue (t
);
2581 /* Return true if T is a valid LHS for a GIMPLE assignment expression. */
2584 is_gimple_lvalue (tree t
)
2586 return (is_gimple_addressable (t
)
2587 || TREE_CODE (t
) == WITH_SIZE_EXPR
2588 /* These are complex lvalues, but don't have addresses, so they
2590 || TREE_CODE (t
) == BIT_FIELD_REF
);
2593 /* Return true if T is a GIMPLE condition. */
2596 is_gimple_condexpr (tree t
)
2598 return (is_gimple_val (t
) || (COMPARISON_CLASS_P (t
)
2599 && !tree_could_trap_p (t
)
2600 && is_gimple_val (TREE_OPERAND (t
, 0))
2601 && is_gimple_val (TREE_OPERAND (t
, 1))));
2604 /* Return true if T is something whose address can be taken. */
2607 is_gimple_addressable (tree t
)
2609 return (is_gimple_id (t
) || handled_component_p (t
)
2610 || TREE_CODE (t
) == MEM_REF
);
2613 /* Return true if T is a valid gimple constant. */
2616 is_gimple_constant (const_tree t
)
2618 switch (TREE_CODE (t
))
2628 /* Vector constant constructors are gimple invariant. */
2630 if (TREE_TYPE (t
) && TREE_CODE (TREE_TYPE (t
)) == VECTOR_TYPE
)
2631 return TREE_CONSTANT (t
);
2640 /* Return true if T is a gimple address. */
2643 is_gimple_address (const_tree t
)
2647 if (TREE_CODE (t
) != ADDR_EXPR
)
2650 op
= TREE_OPERAND (t
, 0);
2651 while (handled_component_p (op
))
2653 if ((TREE_CODE (op
) == ARRAY_REF
2654 || TREE_CODE (op
) == ARRAY_RANGE_REF
)
2655 && !is_gimple_val (TREE_OPERAND (op
, 1)))
2658 op
= TREE_OPERAND (op
, 0);
2661 if (CONSTANT_CLASS_P (op
) || TREE_CODE (op
) == MEM_REF
)
2664 switch (TREE_CODE (op
))
2679 /* Strip out all handled components that produce invariant
2683 strip_invariant_refs (const_tree op
)
2685 while (handled_component_p (op
))
2687 switch (TREE_CODE (op
))
2690 case ARRAY_RANGE_REF
:
2691 if (!is_gimple_constant (TREE_OPERAND (op
, 1))
2692 || TREE_OPERAND (op
, 2) != NULL_TREE
2693 || TREE_OPERAND (op
, 3) != NULL_TREE
)
2698 if (TREE_OPERAND (op
, 2) != NULL_TREE
)
2704 op
= TREE_OPERAND (op
, 0);
2710 /* Return true if T is a gimple invariant address. */
2713 is_gimple_invariant_address (const_tree t
)
2717 if (TREE_CODE (t
) != ADDR_EXPR
)
2720 op
= strip_invariant_refs (TREE_OPERAND (t
, 0));
2724 if (TREE_CODE (op
) == MEM_REF
)
2726 const_tree op0
= TREE_OPERAND (op
, 0);
2727 return (TREE_CODE (op0
) == ADDR_EXPR
2728 && (CONSTANT_CLASS_P (TREE_OPERAND (op0
, 0))
2729 || decl_address_invariant_p (TREE_OPERAND (op0
, 0))));
2732 return CONSTANT_CLASS_P (op
) || decl_address_invariant_p (op
);
2735 /* Return true if T is a gimple invariant address at IPA level
2736 (so addresses of variables on stack are not allowed). */
2739 is_gimple_ip_invariant_address (const_tree t
)
2743 if (TREE_CODE (t
) != ADDR_EXPR
)
2746 op
= strip_invariant_refs (TREE_OPERAND (t
, 0));
2748 return op
&& (CONSTANT_CLASS_P (op
) || decl_address_ip_invariant_p (op
));
2751 /* Return true if T is a GIMPLE minimal invariant. It's a restricted
2752 form of function invariant. */
2755 is_gimple_min_invariant (const_tree t
)
2757 if (TREE_CODE (t
) == ADDR_EXPR
)
2758 return is_gimple_invariant_address (t
);
2760 return is_gimple_constant (t
);
2763 /* Return true if T is a GIMPLE interprocedural invariant. It's a restricted
2764 form of gimple minimal invariant. */
2767 is_gimple_ip_invariant (const_tree t
)
2769 if (TREE_CODE (t
) == ADDR_EXPR
)
2770 return is_gimple_ip_invariant_address (t
);
2772 return is_gimple_constant (t
);
2775 /* Return true if T looks like a valid GIMPLE statement. */
2778 is_gimple_stmt (tree t
)
2780 const enum tree_code code
= TREE_CODE (t
);
2785 /* The only valid NOP_EXPR is the empty statement. */
2786 return IS_EMPTY_STMT (t
);
2790 /* These are only valid if they're void. */
2791 return TREE_TYPE (t
) == NULL
|| VOID_TYPE_P (TREE_TYPE (t
));
2797 case CASE_LABEL_EXPR
:
2798 case TRY_CATCH_EXPR
:
2799 case TRY_FINALLY_EXPR
:
2800 case EH_FILTER_EXPR
:
2803 case STATEMENT_LIST
:
2813 /* These are always void. */
2819 /* These are valid regardless of their type. */
2827 /* Return true if T is a variable. */
2830 is_gimple_variable (tree t
)
2832 return (TREE_CODE (t
) == VAR_DECL
2833 || TREE_CODE (t
) == PARM_DECL
2834 || TREE_CODE (t
) == RESULT_DECL
2835 || TREE_CODE (t
) == SSA_NAME
);
2838 /* Return true if T is a GIMPLE identifier (something with an address). */
2841 is_gimple_id (tree t
)
2843 return (is_gimple_variable (t
)
2844 || TREE_CODE (t
) == FUNCTION_DECL
2845 || TREE_CODE (t
) == LABEL_DECL
2846 || TREE_CODE (t
) == CONST_DECL
2847 /* Allow string constants, since they are addressable. */
2848 || TREE_CODE (t
) == STRING_CST
);
2851 /* Return true if TYPE is a suitable type for a scalar register variable. */
2854 is_gimple_reg_type (tree type
)
2856 return !AGGREGATE_TYPE_P (type
);
2859 /* Return true if T is a non-aggregate register variable. */
2862 is_gimple_reg (tree t
)
2864 if (TREE_CODE (t
) == SSA_NAME
)
2865 t
= SSA_NAME_VAR (t
);
2867 if (!is_gimple_variable (t
))
2870 if (!is_gimple_reg_type (TREE_TYPE (t
)))
2873 /* A volatile decl is not acceptable because we can't reuse it as
2874 needed. We need to copy it into a temp first. */
2875 if (TREE_THIS_VOLATILE (t
))
2878 /* We define "registers" as things that can be renamed as needed,
2879 which with our infrastructure does not apply to memory. */
2880 if (needs_to_live_in_memory (t
))
2883 /* Hard register variables are an interesting case. For those that
2884 are call-clobbered, we don't know where all the calls are, since
2885 we don't (want to) take into account which operations will turn
2886 into libcalls at the rtl level. For those that are call-saved,
2887 we don't currently model the fact that calls may in fact change
2888 global hard registers, nor do we examine ASM_CLOBBERS at the tree
2889 level, and so miss variable changes that might imply. All around,
2890 it seems safest to not do too much optimization with these at the
2891 tree level at all. We'll have to rely on the rtl optimizers to
2892 clean this up, as there we've got all the appropriate bits exposed. */
2893 if (TREE_CODE (t
) == VAR_DECL
&& DECL_HARD_REGISTER (t
))
2896 /* Complex and vector values must have been put into SSA-like form.
2897 That is, no assignments to the individual components. */
2898 if (TREE_CODE (TREE_TYPE (t
)) == COMPLEX_TYPE
2899 || TREE_CODE (TREE_TYPE (t
)) == VECTOR_TYPE
)
2900 return DECL_GIMPLE_REG_P (t
);
2906 /* Return true if T is a GIMPLE variable whose address is not needed. */
2909 is_gimple_non_addressable (tree t
)
2911 if (TREE_CODE (t
) == SSA_NAME
)
2912 t
= SSA_NAME_VAR (t
);
2914 return (is_gimple_variable (t
) && ! needs_to_live_in_memory (t
));
2917 /* Return true if T is a GIMPLE rvalue, i.e. an identifier or a constant. */
2920 is_gimple_val (tree t
)
2922 /* Make loads from volatiles and memory vars explicit. */
2923 if (is_gimple_variable (t
)
2924 && is_gimple_reg_type (TREE_TYPE (t
))
2925 && !is_gimple_reg (t
))
2928 return (is_gimple_variable (t
) || is_gimple_min_invariant (t
));
2931 /* Similarly, but accept hard registers as inputs to asm statements. */
2934 is_gimple_asm_val (tree t
)
2936 if (TREE_CODE (t
) == VAR_DECL
&& DECL_HARD_REGISTER (t
))
2939 return is_gimple_val (t
);
2942 /* Return true if T is a GIMPLE minimal lvalue. */
2945 is_gimple_min_lval (tree t
)
2947 if (!(t
= CONST_CAST_TREE (strip_invariant_refs (t
))))
2949 return (is_gimple_id (t
) || TREE_CODE (t
) == MEM_REF
);
2952 /* Return true if T is a typecast operation. */
2955 is_gimple_cast (tree t
)
2957 return (CONVERT_EXPR_P (t
)
2958 || TREE_CODE (t
) == FIX_TRUNC_EXPR
);
2961 /* Return true if T is a valid function operand of a CALL_EXPR. */
2964 is_gimple_call_addr (tree t
)
2966 return (TREE_CODE (t
) == OBJ_TYPE_REF
|| is_gimple_val (t
));
2969 /* Return true if T is a valid address operand of a MEM_REF. */
2972 is_gimple_mem_ref_addr (tree t
)
2974 return (is_gimple_reg (t
)
2975 || TREE_CODE (t
) == INTEGER_CST
2976 || (TREE_CODE (t
) == ADDR_EXPR
2977 && (CONSTANT_CLASS_P (TREE_OPERAND (t
, 0))
2978 || decl_address_invariant_p (TREE_OPERAND (t
, 0)))));
2981 /* If T makes a function call, return the corresponding CALL_EXPR operand.
2982 Otherwise, return NULL_TREE. */
2985 get_call_expr_in (tree t
)
2987 if (TREE_CODE (t
) == MODIFY_EXPR
)
2988 t
= TREE_OPERAND (t
, 1);
2989 if (TREE_CODE (t
) == WITH_SIZE_EXPR
)
2990 t
= TREE_OPERAND (t
, 0);
2991 if (TREE_CODE (t
) == CALL_EXPR
)
2997 /* Given a memory reference expression T, return its base address.
2998 The base address of a memory reference expression is the main
2999 object being referenced. For instance, the base address for
3000 'array[i].fld[j]' is 'array'. You can think of this as stripping
3001 away the offset part from a memory address.
3003 This function calls handled_component_p to strip away all the inner
3004 parts of the memory reference until it reaches the base object. */
3007 get_base_address (tree t
)
3009 while (handled_component_p (t
))
3010 t
= TREE_OPERAND (t
, 0);
3012 if ((TREE_CODE (t
) == MEM_REF
3013 || TREE_CODE (t
) == TARGET_MEM_REF
)
3014 && TREE_CODE (TREE_OPERAND (t
, 0)) == ADDR_EXPR
)
3015 t
= TREE_OPERAND (TREE_OPERAND (t
, 0), 0);
3017 if (TREE_CODE (t
) == SSA_NAME
3019 || TREE_CODE (t
) == STRING_CST
3020 || TREE_CODE (t
) == CONSTRUCTOR
3021 || INDIRECT_REF_P (t
)
3022 || TREE_CODE (t
) == MEM_REF
3023 || TREE_CODE (t
) == TARGET_MEM_REF
)
3030 recalculate_side_effects (tree t
)
3032 enum tree_code code
= TREE_CODE (t
);
3033 int len
= TREE_OPERAND_LENGTH (t
);
3036 switch (TREE_CODE_CLASS (code
))
3038 case tcc_expression
:
3044 case PREDECREMENT_EXPR
:
3045 case PREINCREMENT_EXPR
:
3046 case POSTDECREMENT_EXPR
:
3047 case POSTINCREMENT_EXPR
:
3048 /* All of these have side-effects, no matter what their
3057 case tcc_comparison
: /* a comparison expression */
3058 case tcc_unary
: /* a unary arithmetic expression */
3059 case tcc_binary
: /* a binary arithmetic expression */
3060 case tcc_reference
: /* a reference */
3061 case tcc_vl_exp
: /* a function call */
3062 TREE_SIDE_EFFECTS (t
) = TREE_THIS_VOLATILE (t
);
3063 for (i
= 0; i
< len
; ++i
)
3065 tree op
= TREE_OPERAND (t
, i
);
3066 if (op
&& TREE_SIDE_EFFECTS (op
))
3067 TREE_SIDE_EFFECTS (t
) = 1;
3072 /* No side-effects. */
3080 /* Canonicalize a tree T for use in a COND_EXPR as conditional. Returns
3081 a canonicalized tree that is valid for a COND_EXPR or NULL_TREE, if
3082 we failed to create one. */
3085 canonicalize_cond_expr_cond (tree t
)
3087 /* Strip conversions around boolean operations. */
3088 if (CONVERT_EXPR_P (t
)
3089 && truth_value_p (TREE_CODE (TREE_OPERAND (t
, 0))))
3090 t
= TREE_OPERAND (t
, 0);
3092 /* For (bool)x use x != 0. */
3093 if (CONVERT_EXPR_P (t
)
3094 && TREE_CODE (TREE_TYPE (t
)) == BOOLEAN_TYPE
)
3096 tree top0
= TREE_OPERAND (t
, 0);
3097 t
= build2 (NE_EXPR
, TREE_TYPE (t
),
3098 top0
, build_int_cst (TREE_TYPE (top0
), 0));
3100 /* For !x use x == 0. */
3101 else if (TREE_CODE (t
) == TRUTH_NOT_EXPR
)
3103 tree top0
= TREE_OPERAND (t
, 0);
3104 t
= build2 (EQ_EXPR
, TREE_TYPE (t
),
3105 top0
, build_int_cst (TREE_TYPE (top0
), 0));
3107 /* For cmp ? 1 : 0 use cmp. */
3108 else if (TREE_CODE (t
) == COND_EXPR
3109 && COMPARISON_CLASS_P (TREE_OPERAND (t
, 0))
3110 && integer_onep (TREE_OPERAND (t
, 1))
3111 && integer_zerop (TREE_OPERAND (t
, 2)))
3113 tree top0
= TREE_OPERAND (t
, 0);
3114 t
= build2 (TREE_CODE (top0
), TREE_TYPE (t
),
3115 TREE_OPERAND (top0
, 0), TREE_OPERAND (top0
, 1));
3118 if (is_gimple_condexpr (t
))
3124 /* Build a GIMPLE_CALL identical to STMT but skipping the arguments in
3125 the positions marked by the set ARGS_TO_SKIP. */
3128 gimple_call_copy_skip_args (gimple stmt
, bitmap args_to_skip
)
3131 tree fn
= gimple_call_fn (stmt
);
3132 int nargs
= gimple_call_num_args (stmt
);
3133 VEC(tree
, heap
) *vargs
= VEC_alloc (tree
, heap
, nargs
);
3136 for (i
= 0; i
< nargs
; i
++)
3137 if (!bitmap_bit_p (args_to_skip
, i
))
3138 VEC_quick_push (tree
, vargs
, gimple_call_arg (stmt
, i
));
3140 new_stmt
= gimple_build_call_vec (fn
, vargs
);
3141 VEC_free (tree
, heap
, vargs
);
3142 if (gimple_call_lhs (stmt
))
3143 gimple_call_set_lhs (new_stmt
, gimple_call_lhs (stmt
));
3145 gimple_set_vuse (new_stmt
, gimple_vuse (stmt
));
3146 gimple_set_vdef (new_stmt
, gimple_vdef (stmt
));
3148 gimple_set_block (new_stmt
, gimple_block (stmt
));
3149 if (gimple_has_location (stmt
))
3150 gimple_set_location (new_stmt
, gimple_location (stmt
));
3151 gimple_call_copy_flags (new_stmt
, stmt
);
3152 gimple_call_set_chain (new_stmt
, gimple_call_chain (stmt
));
3154 gimple_set_modified (new_stmt
, true);
3160 static hashval_t
gimple_type_hash (const void *);
3162 /* Structure used to maintain a cache of some type pairs compared by
3163 gimple_types_compatible_p when comparing aggregate types. There are
3164 three possible values for SAME_P:
3166 -2: The pair (T1, T2) has just been inserted in the table.
3167 0: T1 and T2 are different types.
3168 1: T1 and T2 are the same type.
3170 The two elements in the SAME_P array are indexed by the comparison
3177 signed char same_p
[2];
3179 typedef struct type_pair_d
*type_pair_t
;
3181 DEF_VEC_P(type_pair_t
);
3182 DEF_VEC_ALLOC_P(type_pair_t
,heap
);
3184 /* Return a hash value for the type pair pointed-to by P. */
3187 type_pair_hash (const void *p
)
3189 const struct type_pair_d
*pair
= (const struct type_pair_d
*) p
;
3190 hashval_t val1
= pair
->uid1
;
3191 hashval_t val2
= pair
->uid2
;
3192 return (iterative_hash_hashval_t (val2
, val1
)
3193 ^ iterative_hash_hashval_t (val1
, val2
));
3196 /* Compare two type pairs pointed-to by P1 and P2. */
3199 type_pair_eq (const void *p1
, const void *p2
)
3201 const struct type_pair_d
*pair1
= (const struct type_pair_d
*) p1
;
3202 const struct type_pair_d
*pair2
= (const struct type_pair_d
*) p2
;
3203 return ((pair1
->uid1
== pair2
->uid1
&& pair1
->uid2
== pair2
->uid2
)
3204 || (pair1
->uid1
== pair2
->uid2
&& pair1
->uid2
== pair2
->uid1
));
3207 /* Lookup the pair of types T1 and T2 in *VISITED_P. Insert a new
3208 entry if none existed. */
3211 lookup_type_pair (tree t1
, tree t2
, htab_t
*visited_p
, struct obstack
*ob_p
)
3213 struct type_pair_d pair
;
3217 if (*visited_p
== NULL
)
3219 *visited_p
= htab_create (251, type_pair_hash
, type_pair_eq
, NULL
);
3220 gcc_obstack_init (ob_p
);
3223 pair
.uid1
= TYPE_UID (t1
);
3224 pair
.uid2
= TYPE_UID (t2
);
3225 slot
= htab_find_slot (*visited_p
, &pair
, INSERT
);
3228 p
= *((type_pair_t
*) slot
);
3231 p
= XOBNEW (ob_p
, struct type_pair_d
);
3232 p
->uid1
= TYPE_UID (t1
);
3233 p
->uid2
= TYPE_UID (t2
);
3242 /* Per pointer state for the SCC finding. The on_sccstack flag
3243 is not strictly required, it is true when there is no hash value
3244 recorded for the type and false otherwise. But querying that
3249 unsigned int dfsnum
;
3258 static unsigned int next_dfs_num
;
3259 static unsigned int gtc_next_dfs_num
;
3262 /* GIMPLE type merging cache. A direct-mapped cache based on TYPE_UID. */
3264 typedef struct GTY(()) gimple_type_leader_entry_s
{
3267 } gimple_type_leader_entry
;
3269 #define GIMPLE_TYPE_LEADER_SIZE 16381
3270 static GTY((length("GIMPLE_TYPE_LEADER_SIZE"))) gimple_type_leader_entry
3271 *gimple_type_leader
;
3273 /* Lookup an existing leader for T and return it or NULL_TREE, if
3274 there is none in the cache. */
3277 gimple_lookup_type_leader (tree t
)
3279 gimple_type_leader_entry
*leader
;
3281 if (!gimple_type_leader
)
3284 leader
= &gimple_type_leader
[TYPE_UID (t
) % GIMPLE_TYPE_LEADER_SIZE
];
3285 if (leader
->type
!= t
)
3288 return leader
->leader
;
3291 /* Return true if T1 and T2 have the same name. If FOR_COMPLETION_P is
3292 true then if any type has no name return false, otherwise return
3293 true if both types have no names. */
3296 compare_type_names_p (tree t1
, tree t2
, bool for_completion_p
)
3298 tree name1
= TYPE_NAME (t1
);
3299 tree name2
= TYPE_NAME (t2
);
3301 /* Consider anonymous types all unique for completion. */
3302 if (for_completion_p
3303 && (!name1
|| !name2
))
3306 if (name1
&& TREE_CODE (name1
) == TYPE_DECL
)
3308 name1
= DECL_NAME (name1
);
3309 if (for_completion_p
3313 gcc_assert (!name1
|| TREE_CODE (name1
) == IDENTIFIER_NODE
);
3315 if (name2
&& TREE_CODE (name2
) == TYPE_DECL
)
3317 name2
= DECL_NAME (name2
);
3318 if (for_completion_p
3322 gcc_assert (!name2
|| TREE_CODE (name2
) == IDENTIFIER_NODE
);
3324 /* Identifiers can be compared with pointer equality rather
3325 than a string comparison. */
3332 /* Return true if the field decls F1 and F2 are at the same offset.
3334 This is intended to be used on GIMPLE types only. In order to
3335 compare GENERIC types, use fields_compatible_p instead. */
3338 gimple_compare_field_offset (tree f1
, tree f2
)
3340 if (DECL_OFFSET_ALIGN (f1
) == DECL_OFFSET_ALIGN (f2
))
3342 tree offset1
= DECL_FIELD_OFFSET (f1
);
3343 tree offset2
= DECL_FIELD_OFFSET (f2
);
3344 return ((offset1
== offset2
3345 /* Once gimplification is done, self-referential offsets are
3346 instantiated as operand #2 of the COMPONENT_REF built for
3347 each access and reset. Therefore, they are not relevant
3348 anymore and fields are interchangeable provided that they
3349 represent the same access. */
3350 || (TREE_CODE (offset1
) == PLACEHOLDER_EXPR
3351 && TREE_CODE (offset2
) == PLACEHOLDER_EXPR
3352 && (DECL_SIZE (f1
) == DECL_SIZE (f2
)
3353 || (TREE_CODE (DECL_SIZE (f1
)) == PLACEHOLDER_EXPR
3354 && TREE_CODE (DECL_SIZE (f2
)) == PLACEHOLDER_EXPR
)
3355 || operand_equal_p (DECL_SIZE (f1
), DECL_SIZE (f2
), 0))
3356 && DECL_ALIGN (f1
) == DECL_ALIGN (f2
))
3357 || operand_equal_p (offset1
, offset2
, 0))
3358 && tree_int_cst_equal (DECL_FIELD_BIT_OFFSET (f1
),
3359 DECL_FIELD_BIT_OFFSET (f2
)));
3362 /* Fortran and C do not always agree on what DECL_OFFSET_ALIGN
3363 should be, so handle differing ones specially by decomposing
3364 the offset into a byte and bit offset manually. */
3365 if (host_integerp (DECL_FIELD_OFFSET (f1
), 0)
3366 && host_integerp (DECL_FIELD_OFFSET (f2
), 0))
3368 unsigned HOST_WIDE_INT byte_offset1
, byte_offset2
;
3369 unsigned HOST_WIDE_INT bit_offset1
, bit_offset2
;
3370 bit_offset1
= TREE_INT_CST_LOW (DECL_FIELD_BIT_OFFSET (f1
));
3371 byte_offset1
= (TREE_INT_CST_LOW (DECL_FIELD_OFFSET (f1
))
3372 + bit_offset1
/ BITS_PER_UNIT
);
3373 bit_offset2
= TREE_INT_CST_LOW (DECL_FIELD_BIT_OFFSET (f2
));
3374 byte_offset2
= (TREE_INT_CST_LOW (DECL_FIELD_OFFSET (f2
))
3375 + bit_offset2
/ BITS_PER_UNIT
);
3376 if (byte_offset1
!= byte_offset2
)
3378 return bit_offset1
% BITS_PER_UNIT
== bit_offset2
% BITS_PER_UNIT
;
3384 /* If the type T1 and the type T2 are a complete and an incomplete
3385 variant of the same type return true. */
3388 gimple_compatible_complete_and_incomplete_subtype_p (tree t1
, tree t2
)
3390 /* If one pointer points to an incomplete type variant of
3391 the other pointed-to type they are the same. */
3392 if (TREE_CODE (t1
) == TREE_CODE (t2
)
3393 && RECORD_OR_UNION_TYPE_P (t1
)
3394 && (!COMPLETE_TYPE_P (t1
)
3395 || !COMPLETE_TYPE_P (t2
))
3396 && TYPE_QUALS (t1
) == TYPE_QUALS (t2
)
3397 && compare_type_names_p (TYPE_MAIN_VARIANT (t1
),
3398 TYPE_MAIN_VARIANT (t2
), true))
3404 gimple_types_compatible_p_1 (tree
, tree
, enum gtc_mode
, type_pair_t
,
3405 VEC(type_pair_t
, heap
) **,
3406 struct pointer_map_t
*, struct obstack
*);
3408 /* DFS visit the edge from the callers type pair with state *STATE to
3409 the pair T1, T2 while operating in FOR_MERGING_P mode.
3410 Update the merging status if it is not part of the SCC containing the
3411 callers pair and return it.
3412 SCCSTACK, SCCSTATE and SCCSTATE_OBSTACK are state for the DFS walk done. */
3415 gtc_visit (tree t1
, tree t2
, enum gtc_mode mode
,
3417 VEC(type_pair_t
, heap
) **sccstack
,
3418 struct pointer_map_t
*sccstate
,
3419 struct obstack
*sccstate_obstack
)
3421 struct sccs
*cstate
= NULL
;
3425 /* Check first for the obvious case of pointer identity. */
3429 /* Check that we have two types to compare. */
3430 if (t1
== NULL_TREE
|| t2
== NULL_TREE
)
3433 /* If the types have been previously registered and found equal
3435 if (mode
== GTC_MERGE
)
3437 tree leader1
= gimple_lookup_type_leader (t1
);
3438 tree leader2
= gimple_lookup_type_leader (t2
);
3441 || (leader1
&& leader1
== leader2
))
3444 else if (mode
== GTC_DIAG
)
3446 if (TYPE_CANONICAL (t1
)
3447 && TYPE_CANONICAL (t1
) == TYPE_CANONICAL (t2
))
3451 /* Can't be the same type if the types don't have the same code. */
3452 if (TREE_CODE (t1
) != TREE_CODE (t2
))
3455 /* Can't be the same type if they have different CV qualifiers. */
3456 if (TYPE_QUALS (t1
) != TYPE_QUALS (t2
))
3459 /* Void types are always the same. */
3460 if (TREE_CODE (t1
) == VOID_TYPE
)
3463 /* Do some simple checks before doing three hashtable queries. */
3464 if (INTEGRAL_TYPE_P (t1
)
3465 || SCALAR_FLOAT_TYPE_P (t1
)
3466 || FIXED_POINT_TYPE_P (t1
)
3467 || TREE_CODE (t1
) == VECTOR_TYPE
3468 || TREE_CODE (t1
) == COMPLEX_TYPE
3469 || TREE_CODE (t1
) == OFFSET_TYPE
)
3471 /* Can't be the same type if they have different alignment,
3472 sign, precision or mode. */
3473 if (TYPE_ALIGN (t1
) != TYPE_ALIGN (t2
)
3474 || TYPE_PRECISION (t1
) != TYPE_PRECISION (t2
)
3475 || TYPE_MODE (t1
) != TYPE_MODE (t2
)
3476 || TYPE_UNSIGNED (t1
) != TYPE_UNSIGNED (t2
))
3479 if (TREE_CODE (t1
) == INTEGER_TYPE
3480 && (TYPE_IS_SIZETYPE (t1
) != TYPE_IS_SIZETYPE (t2
)
3481 || TYPE_STRING_FLAG (t1
) != TYPE_STRING_FLAG (t2
)))
3484 /* That's all we need to check for float and fixed-point types. */
3485 if (SCALAR_FLOAT_TYPE_P (t1
)
3486 || FIXED_POINT_TYPE_P (t1
))
3489 /* For integral types fall thru to more complex checks. */
3492 else if (AGGREGATE_TYPE_P (t1
) || POINTER_TYPE_P (t1
))
3494 /* Can't be the same type if they have different alignment or mode. */
3495 if (TYPE_ALIGN (t1
) != TYPE_ALIGN (t2
)
3496 || TYPE_MODE (t1
) != TYPE_MODE (t2
))
3500 /* If the hash values of t1 and t2 are different the types can't
3501 possibly be the same. This helps keeping the type-pair hashtable
3502 small, only tracking comparisons for hash collisions. */
3503 if (gimple_type_hash (t1
) != gimple_type_hash (t2
))
3506 /* Allocate a new cache entry for this comparison. */
3507 p
= lookup_type_pair (t1
, t2
, >c_visited
, >c_ob
);
3508 if (p
->same_p
[mode
] == 0 || p
->same_p
[mode
] == 1)
3510 /* We have already decided whether T1 and T2 are the
3511 same, return the cached result. */
3512 return p
->same_p
[mode
] == 1;
3515 if ((slot
= pointer_map_contains (sccstate
, p
)) != NULL
)
3516 cstate
= (struct sccs
*)*slot
;
3520 /* Not yet visited. DFS recurse. */
3521 res
= gimple_types_compatible_p_1 (t1
, t2
, mode
, p
,
3522 sccstack
, sccstate
, sccstate_obstack
);
3524 cstate
= (struct sccs
*)* pointer_map_contains (sccstate
, p
);
3525 state
->low
= MIN (state
->low
, cstate
->low
);
3526 /* If the type is no longer on the SCC stack and thus is not part
3527 of the parents SCC, return its state. Otherwise we will
3528 ignore this pair and assume equality. */
3529 if (!cstate
->on_sccstack
)
3532 if (cstate
->dfsnum
< state
->dfsnum
3533 && cstate
->on_sccstack
)
3534 state
->low
= MIN (cstate
->dfsnum
, state
->low
);
3536 /* We are part of our parents SCC, skip this entry and return true. */
3540 /* Worker for gimple_types_compatible.
3541 SCCSTACK, SCCSTATE and SCCSTATE_OBSTACK are state for the DFS walk done. */
3544 gimple_types_compatible_p_1 (tree t1
, tree t2
, enum gtc_mode mode
,
3546 VEC(type_pair_t
, heap
) **sccstack
,
3547 struct pointer_map_t
*sccstate
,
3548 struct obstack
*sccstate_obstack
)
3552 gcc_assert (p
->same_p
[mode
] == -2);
3554 state
= XOBNEW (sccstate_obstack
, struct sccs
);
3555 *pointer_map_insert (sccstate
, p
) = state
;
3557 VEC_safe_push (type_pair_t
, heap
, *sccstack
, p
);
3558 state
->dfsnum
= gtc_next_dfs_num
++;
3559 state
->low
= state
->dfsnum
;
3560 state
->on_sccstack
= true;
3562 /* If their attributes are not the same they can't be the same type. */
3563 if (!attribute_list_equal (TYPE_ATTRIBUTES (t1
), TYPE_ATTRIBUTES (t2
)))
3564 goto different_types
;
3566 /* Do type-specific comparisons. */
3567 switch (TREE_CODE (t1
))
3571 if (!gtc_visit (TREE_TYPE (t1
), TREE_TYPE (t2
), mode
,
3572 state
, sccstack
, sccstate
, sccstate_obstack
))
3573 goto different_types
;
3577 /* Array types are the same if the element types are the same and
3578 the number of elements are the same. */
3579 if (!gtc_visit (TREE_TYPE (t1
), TREE_TYPE (t2
), mode
,
3580 state
, sccstack
, sccstate
, sccstate_obstack
)
3581 || TYPE_STRING_FLAG (t1
) != TYPE_STRING_FLAG (t2
)
3582 || TYPE_NONALIASED_COMPONENT (t1
) != TYPE_NONALIASED_COMPONENT (t2
))
3583 goto different_types
;
3586 tree i1
= TYPE_DOMAIN (t1
);
3587 tree i2
= TYPE_DOMAIN (t2
);
3589 /* For an incomplete external array, the type domain can be
3590 NULL_TREE. Check this condition also. */
3591 if (i1
== NULL_TREE
&& i2
== NULL_TREE
)
3593 else if (i1
== NULL_TREE
|| i2
== NULL_TREE
)
3594 goto different_types
;
3595 /* If for a complete array type the possibly gimplified sizes
3596 are different the types are different. */
3597 else if (((TYPE_SIZE (i1
) != NULL
) ^ (TYPE_SIZE (i2
) != NULL
))
3600 && !operand_equal_p (TYPE_SIZE (i1
), TYPE_SIZE (i2
), 0)))
3601 goto different_types
;
3604 tree min1
= TYPE_MIN_VALUE (i1
);
3605 tree min2
= TYPE_MIN_VALUE (i2
);
3606 tree max1
= TYPE_MAX_VALUE (i1
);
3607 tree max2
= TYPE_MAX_VALUE (i2
);
3609 /* The minimum/maximum values have to be the same. */
3612 && ((TREE_CODE (min1
) == PLACEHOLDER_EXPR
3613 && TREE_CODE (min2
) == PLACEHOLDER_EXPR
)
3614 || operand_equal_p (min1
, min2
, 0))))
3617 && ((TREE_CODE (max1
) == PLACEHOLDER_EXPR
3618 && TREE_CODE (max2
) == PLACEHOLDER_EXPR
)
3619 || operand_equal_p (max1
, max2
, 0)))))
3622 goto different_types
;
3627 /* Method types should belong to the same class. */
3628 if (!gtc_visit (TYPE_METHOD_BASETYPE (t1
), TYPE_METHOD_BASETYPE (t2
),
3629 mode
, state
, sccstack
, sccstate
, sccstate_obstack
))
3630 goto different_types
;
3635 /* Function types are the same if the return type and arguments types
3637 if ((mode
!= GTC_DIAG
3638 || !gimple_compatible_complete_and_incomplete_subtype_p
3639 (TREE_TYPE (t1
), TREE_TYPE (t2
)))
3640 && !gtc_visit (TREE_TYPE (t1
), TREE_TYPE (t2
), mode
,
3641 state
, sccstack
, sccstate
, sccstate_obstack
))
3642 goto different_types
;
3644 if (!targetm
.comp_type_attributes (t1
, t2
))
3645 goto different_types
;
3647 if (TYPE_ARG_TYPES (t1
) == TYPE_ARG_TYPES (t2
))
3651 tree parms1
, parms2
;
3653 for (parms1
= TYPE_ARG_TYPES (t1
), parms2
= TYPE_ARG_TYPES (t2
);
3655 parms1
= TREE_CHAIN (parms1
), parms2
= TREE_CHAIN (parms2
))
3657 if ((mode
== GTC_MERGE
3658 || !gimple_compatible_complete_and_incomplete_subtype_p
3659 (TREE_VALUE (parms1
), TREE_VALUE (parms2
)))
3660 && !gtc_visit (TREE_VALUE (parms1
), TREE_VALUE (parms2
), mode
,
3661 state
, sccstack
, sccstate
, sccstate_obstack
))
3662 goto different_types
;
3665 if (parms1
|| parms2
)
3666 goto different_types
;
3673 if (!gtc_visit (TREE_TYPE (t1
), TREE_TYPE (t2
), mode
,
3674 state
, sccstack
, sccstate
, sccstate_obstack
)
3675 || !gtc_visit (TYPE_OFFSET_BASETYPE (t1
),
3676 TYPE_OFFSET_BASETYPE (t2
), mode
,
3677 state
, sccstack
, sccstate
, sccstate_obstack
))
3678 goto different_types
;
3684 case REFERENCE_TYPE
:
3686 /* If the two pointers have different ref-all attributes,
3687 they can't be the same type. */
3688 if (TYPE_REF_CAN_ALIAS_ALL (t1
) != TYPE_REF_CAN_ALIAS_ALL (t2
))
3689 goto different_types
;
3691 /* If one pointer points to an incomplete type variant of
3692 the other pointed-to type they are the same. */
3693 if (mode
== GTC_DIAG
3694 && gimple_compatible_complete_and_incomplete_subtype_p
3695 (TREE_TYPE (t1
), TREE_TYPE (t2
)))
3698 /* Otherwise, pointer and reference types are the same if the
3699 pointed-to types are the same. */
3700 if (gtc_visit (TREE_TYPE (t1
), TREE_TYPE (t2
), mode
,
3701 state
, sccstack
, sccstate
, sccstate_obstack
))
3704 goto different_types
;
3708 /* There is only one decltype(nullptr). */
3714 tree min1
= TYPE_MIN_VALUE (t1
);
3715 tree max1
= TYPE_MAX_VALUE (t1
);
3716 tree min2
= TYPE_MIN_VALUE (t2
);
3717 tree max2
= TYPE_MAX_VALUE (t2
);
3718 bool min_equal_p
= false;
3719 bool max_equal_p
= false;
3721 /* If either type has a minimum value, the other type must
3723 if (min1
== NULL_TREE
&& min2
== NULL_TREE
)
3725 else if (min1
&& min2
&& operand_equal_p (min1
, min2
, 0))
3728 /* Likewise, if either type has a maximum value, the other
3729 type must have the same. */
3730 if (max1
== NULL_TREE
&& max2
== NULL_TREE
)
3732 else if (max1
&& max2
&& operand_equal_p (max1
, max2
, 0))
3735 if (!min_equal_p
|| !max_equal_p
)
3736 goto different_types
;
3743 /* FIXME lto, we cannot check bounds on enumeral types because
3744 different front ends will produce different values.
3745 In C, enumeral types are integers, while in C++ each element
3746 will have its own symbolic value. We should decide how enums
3747 are to be represented in GIMPLE and have each front end lower
3751 /* For enumeral types, all the values must be the same. */
3752 if (TYPE_VALUES (t1
) == TYPE_VALUES (t2
))
3755 for (v1
= TYPE_VALUES (t1
), v2
= TYPE_VALUES (t2
);
3757 v1
= TREE_CHAIN (v1
), v2
= TREE_CHAIN (v2
))
3759 tree c1
= TREE_VALUE (v1
);
3760 tree c2
= TREE_VALUE (v2
);
3762 if (TREE_CODE (c1
) == CONST_DECL
)
3763 c1
= DECL_INITIAL (c1
);
3765 if (TREE_CODE (c2
) == CONST_DECL
)
3766 c2
= DECL_INITIAL (c2
);
3768 if (tree_int_cst_equal (c1
, c2
) != 1)
3769 goto different_types
;
3772 /* If one enumeration has more values than the other, they
3773 are not the same. */
3775 goto different_types
;
3782 case QUAL_UNION_TYPE
:
3786 /* The struct tags shall compare equal. */
3787 if (!compare_type_names_p (TYPE_MAIN_VARIANT (t1
),
3788 TYPE_MAIN_VARIANT (t2
), false))
3789 goto different_types
;
3791 /* For aggregate types, all the fields must be the same. */
3792 for (f1
= TYPE_FIELDS (t1
), f2
= TYPE_FIELDS (t2
);
3794 f1
= TREE_CHAIN (f1
), f2
= TREE_CHAIN (f2
))
3796 /* The fields must have the same name, offset and type. */
3797 if (DECL_NAME (f1
) != DECL_NAME (f2
)
3798 || DECL_NONADDRESSABLE_P (f1
) != DECL_NONADDRESSABLE_P (f2
)
3799 || !gimple_compare_field_offset (f1
, f2
)
3800 || !gtc_visit (TREE_TYPE (f1
), TREE_TYPE (f2
), mode
,
3801 state
, sccstack
, sccstate
, sccstate_obstack
))
3802 goto different_types
;
3805 /* If one aggregate has more fields than the other, they
3806 are not the same. */
3808 goto different_types
;
3817 /* Common exit path for types that are not compatible. */
3819 state
->u
.same_p
= 0;
3822 /* Common exit path for types that are compatible. */
3824 state
->u
.same_p
= 1;
3828 if (state
->low
== state
->dfsnum
)
3832 /* Pop off the SCC and set its cache values. */
3835 struct sccs
*cstate
;
3836 x
= VEC_pop (type_pair_t
, *sccstack
);
3837 cstate
= (struct sccs
*)*pointer_map_contains (sccstate
, x
);
3838 cstate
->on_sccstack
= false;
3839 x
->same_p
[mode
] = cstate
->u
.same_p
;
3844 return state
->u
.same_p
;
3847 /* Return true iff T1 and T2 are structurally identical. When
3848 FOR_MERGING_P is true the an incomplete type and a complete type
3849 are considered different, otherwise they are considered compatible. */
3852 gimple_types_compatible_p (tree t1
, tree t2
, enum gtc_mode mode
)
3854 VEC(type_pair_t
, heap
) *sccstack
= NULL
;
3855 struct pointer_map_t
*sccstate
;
3856 struct obstack sccstate_obstack
;
3857 type_pair_t p
= NULL
;
3860 /* Before starting to set up the SCC machinery handle simple cases. */
3862 /* Check first for the obvious case of pointer identity. */
3866 /* Check that we have two types to compare. */
3867 if (t1
== NULL_TREE
|| t2
== NULL_TREE
)
3870 /* If the types have been previously registered and found equal
3872 if (mode
== GTC_MERGE
)
3874 tree leader1
= gimple_lookup_type_leader (t1
);
3875 tree leader2
= gimple_lookup_type_leader (t2
);
3878 || (leader1
&& leader1
== leader2
))
3881 else if (mode
== GTC_DIAG
)
3883 if (TYPE_CANONICAL (t1
)
3884 && TYPE_CANONICAL (t1
) == TYPE_CANONICAL (t2
))
3888 /* Can't be the same type if the types don't have the same code. */
3889 if (TREE_CODE (t1
) != TREE_CODE (t2
))
3892 /* Can't be the same type if they have different CV qualifiers. */
3893 if (TYPE_QUALS (t1
) != TYPE_QUALS (t2
))
3896 /* Void types are always the same. */
3897 if (TREE_CODE (t1
) == VOID_TYPE
)
3900 /* Do some simple checks before doing three hashtable queries. */
3901 if (INTEGRAL_TYPE_P (t1
)
3902 || SCALAR_FLOAT_TYPE_P (t1
)
3903 || FIXED_POINT_TYPE_P (t1
)
3904 || TREE_CODE (t1
) == VECTOR_TYPE
3905 || TREE_CODE (t1
) == COMPLEX_TYPE
3906 || TREE_CODE (t1
) == OFFSET_TYPE
)
3908 /* Can't be the same type if they have different alignment,
3909 sign, precision or mode. */
3910 if (TYPE_ALIGN (t1
) != TYPE_ALIGN (t2
)
3911 || TYPE_PRECISION (t1
) != TYPE_PRECISION (t2
)
3912 || TYPE_MODE (t1
) != TYPE_MODE (t2
)
3913 || TYPE_UNSIGNED (t1
) != TYPE_UNSIGNED (t2
))
3916 if (TREE_CODE (t1
) == INTEGER_TYPE
3917 && (TYPE_IS_SIZETYPE (t1
) != TYPE_IS_SIZETYPE (t2
)
3918 || TYPE_STRING_FLAG (t1
) != TYPE_STRING_FLAG (t2
)))
3921 /* That's all we need to check for float and fixed-point types. */
3922 if (SCALAR_FLOAT_TYPE_P (t1
)
3923 || FIXED_POINT_TYPE_P (t1
))
3926 /* For integral types fall thru to more complex checks. */
3929 else if (AGGREGATE_TYPE_P (t1
) || POINTER_TYPE_P (t1
))
3931 /* Can't be the same type if they have different alignment or mode. */
3932 if (TYPE_ALIGN (t1
) != TYPE_ALIGN (t2
)
3933 || TYPE_MODE (t1
) != TYPE_MODE (t2
))
3937 /* If the hash values of t1 and t2 are different the types can't
3938 possibly be the same. This helps keeping the type-pair hashtable
3939 small, only tracking comparisons for hash collisions. */
3940 if (gimple_type_hash (t1
) != gimple_type_hash (t2
))
3943 /* If we've visited this type pair before (in the case of aggregates
3944 with self-referential types), and we made a decision, return it. */
3945 p
= lookup_type_pair (t1
, t2
, >c_visited
, >c_ob
);
3946 if (p
->same_p
[mode
] == 0 || p
->same_p
[mode
] == 1)
3948 /* We have already decided whether T1 and T2 are the
3949 same, return the cached result. */
3950 return p
->same_p
[mode
] == 1;
3953 /* Now set up the SCC machinery for the comparison. */
3954 gtc_next_dfs_num
= 1;
3955 sccstate
= pointer_map_create ();
3956 gcc_obstack_init (&sccstate_obstack
);
3957 res
= gimple_types_compatible_p_1 (t1
, t2
, mode
, p
,
3958 &sccstack
, sccstate
, &sccstate_obstack
);
3959 VEC_free (type_pair_t
, heap
, sccstack
);
3960 pointer_map_destroy (sccstate
);
3961 obstack_free (&sccstate_obstack
, NULL
);
3968 iterative_hash_gimple_type (tree
, hashval_t
, VEC(tree
, heap
) **,
3969 struct pointer_map_t
*, struct obstack
*);
3971 /* DFS visit the edge from the callers type with state *STATE to T.
3972 Update the callers type hash V with the hash for T if it is not part
3973 of the SCC containing the callers type and return it.
3974 SCCSTACK, SCCSTATE and SCCSTATE_OBSTACK are state for the DFS walk done. */
3977 visit (tree t
, struct sccs
*state
, hashval_t v
,
3978 VEC (tree
, heap
) **sccstack
,
3979 struct pointer_map_t
*sccstate
,
3980 struct obstack
*sccstate_obstack
)
3982 struct sccs
*cstate
= NULL
;
3983 struct tree_int_map m
;
3986 /* If there is a hash value recorded for this type then it can't
3987 possibly be part of our parent SCC. Simply mix in its hash. */
3989 if ((slot
= htab_find_slot (type_hash_cache
, &m
, NO_INSERT
))
3991 return iterative_hash_hashval_t (((struct tree_int_map
*) *slot
)->to
, v
);
3993 if ((slot
= pointer_map_contains (sccstate
, t
)) != NULL
)
3994 cstate
= (struct sccs
*)*slot
;
3998 /* Not yet visited. DFS recurse. */
3999 tem
= iterative_hash_gimple_type (t
, v
,
4000 sccstack
, sccstate
, sccstate_obstack
);
4002 cstate
= (struct sccs
*)* pointer_map_contains (sccstate
, t
);
4003 state
->low
= MIN (state
->low
, cstate
->low
);
4004 /* If the type is no longer on the SCC stack and thus is not part
4005 of the parents SCC mix in its hash value. Otherwise we will
4006 ignore the type for hashing purposes and return the unaltered
4008 if (!cstate
->on_sccstack
)
4011 if (cstate
->dfsnum
< state
->dfsnum
4012 && cstate
->on_sccstack
)
4013 state
->low
= MIN (cstate
->dfsnum
, state
->low
);
4015 /* We are part of our parents SCC, skip this type during hashing
4016 and return the unaltered hash value. */
4020 /* Hash NAME with the previous hash value V and return it. */
4023 iterative_hash_name (tree name
, hashval_t v
)
4027 if (TREE_CODE (name
) == TYPE_DECL
)
4028 name
= DECL_NAME (name
);
4031 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
4032 return iterative_hash_object (IDENTIFIER_HASH_VALUE (name
), v
);
4035 /* Returning a hash value for gimple type TYPE combined with VAL.
4036 SCCSTACK, SCCSTATE and SCCSTATE_OBSTACK are state for the DFS walk done.
4038 To hash a type we end up hashing in types that are reachable.
4039 Through pointers we can end up with cycles which messes up the
4040 required property that we need to compute the same hash value
4041 for structurally equivalent types. To avoid this we have to
4042 hash all types in a cycle (the SCC) in a commutative way. The
4043 easiest way is to not mix in the hashes of the SCC members at
4044 all. To make this work we have to delay setting the hash
4045 values of the SCC until it is complete. */
4048 iterative_hash_gimple_type (tree type
, hashval_t val
,
4049 VEC(tree
, heap
) **sccstack
,
4050 struct pointer_map_t
*sccstate
,
4051 struct obstack
*sccstate_obstack
)
4057 /* Not visited during this DFS walk. */
4058 gcc_checking_assert (!pointer_map_contains (sccstate
, type
));
4059 state
= XOBNEW (sccstate_obstack
, struct sccs
);
4060 *pointer_map_insert (sccstate
, type
) = state
;
4062 VEC_safe_push (tree
, heap
, *sccstack
, type
);
4063 state
->dfsnum
= next_dfs_num
++;
4064 state
->low
= state
->dfsnum
;
4065 state
->on_sccstack
= true;
4067 /* Combine a few common features of types so that types are grouped into
4068 smaller sets; when searching for existing matching types to merge,
4069 only existing types having the same features as the new type will be
4071 v
= iterative_hash_hashval_t (TREE_CODE (type
), 0);
4072 v
= iterative_hash_hashval_t (TYPE_QUALS (type
), v
);
4073 v
= iterative_hash_hashval_t (TREE_ADDRESSABLE (type
), v
);
4075 /* Do not hash the types size as this will cause differences in
4076 hash values for the complete vs. the incomplete type variant. */
4078 /* Incorporate common features of numerical types. */
4079 if (INTEGRAL_TYPE_P (type
)
4080 || SCALAR_FLOAT_TYPE_P (type
)
4081 || FIXED_POINT_TYPE_P (type
))
4083 v
= iterative_hash_hashval_t (TYPE_PRECISION (type
), v
);
4084 v
= iterative_hash_hashval_t (TYPE_MODE (type
), v
);
4085 v
= iterative_hash_hashval_t (TYPE_UNSIGNED (type
), v
);
4088 /* For pointer and reference types, fold in information about the type
4089 pointed to but do not recurse into possibly incomplete types to
4090 avoid hash differences for complete vs. incomplete types. */
4091 if (POINTER_TYPE_P (type
))
4093 if (RECORD_OR_UNION_TYPE_P (TREE_TYPE (type
)))
4095 v
= iterative_hash_hashval_t (TREE_CODE (TREE_TYPE (type
)), v
);
4096 v
= iterative_hash_name
4097 (TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (type
))), v
);
4100 v
= visit (TREE_TYPE (type
), state
, v
,
4101 sccstack
, sccstate
, sccstate_obstack
);
4104 /* For integer types hash the types min/max values and the string flag. */
4105 if (TREE_CODE (type
) == INTEGER_TYPE
)
4107 /* OMP lowering can introduce error_mark_node in place of
4108 random local decls in types. */
4109 if (TYPE_MIN_VALUE (type
) != error_mark_node
)
4110 v
= iterative_hash_expr (TYPE_MIN_VALUE (type
), v
);
4111 if (TYPE_MAX_VALUE (type
) != error_mark_node
)
4112 v
= iterative_hash_expr (TYPE_MAX_VALUE (type
), v
);
4113 v
= iterative_hash_hashval_t (TYPE_STRING_FLAG (type
), v
);
4116 /* For array types hash their domain and the string flag. */
4117 if (TREE_CODE (type
) == ARRAY_TYPE
4118 && TYPE_DOMAIN (type
))
4120 v
= iterative_hash_hashval_t (TYPE_STRING_FLAG (type
), v
);
4121 v
= visit (TYPE_DOMAIN (type
), state
, v
,
4122 sccstack
, sccstate
, sccstate_obstack
);
4125 /* Recurse for aggregates with a single element type. */
4126 if (TREE_CODE (type
) == ARRAY_TYPE
4127 || TREE_CODE (type
) == COMPLEX_TYPE
4128 || TREE_CODE (type
) == VECTOR_TYPE
)
4129 v
= visit (TREE_TYPE (type
), state
, v
,
4130 sccstack
, sccstate
, sccstate_obstack
);
4132 /* Incorporate function return and argument types. */
4133 if (TREE_CODE (type
) == FUNCTION_TYPE
|| TREE_CODE (type
) == METHOD_TYPE
)
4138 /* For method types also incorporate their parent class. */
4139 if (TREE_CODE (type
) == METHOD_TYPE
)
4140 v
= visit (TYPE_METHOD_BASETYPE (type
), state
, v
,
4141 sccstack
, sccstate
, sccstate_obstack
);
4143 /* For result types allow mismatch in completeness. */
4144 if (RECORD_OR_UNION_TYPE_P (TREE_TYPE (type
)))
4146 v
= iterative_hash_hashval_t (TREE_CODE (TREE_TYPE (type
)), v
);
4147 v
= iterative_hash_name
4148 (TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (type
))), v
);
4151 v
= visit (TREE_TYPE (type
), state
, v
,
4152 sccstack
, sccstate
, sccstate_obstack
);
4154 for (p
= TYPE_ARG_TYPES (type
), na
= 0; p
; p
= TREE_CHAIN (p
))
4156 /* For argument types allow mismatch in completeness. */
4157 if (RECORD_OR_UNION_TYPE_P (TREE_VALUE (p
)))
4159 v
= iterative_hash_hashval_t (TREE_CODE (TREE_VALUE (p
)), v
);
4160 v
= iterative_hash_name
4161 (TYPE_NAME (TYPE_MAIN_VARIANT (TREE_VALUE (p
))), v
);
4164 v
= visit (TREE_VALUE (p
), state
, v
,
4165 sccstack
, sccstate
, sccstate_obstack
);
4169 v
= iterative_hash_hashval_t (na
, v
);
4172 if (TREE_CODE (type
) == RECORD_TYPE
4173 || TREE_CODE (type
) == UNION_TYPE
4174 || TREE_CODE (type
) == QUAL_UNION_TYPE
)
4179 v
= iterative_hash_name (TYPE_NAME (TYPE_MAIN_VARIANT (type
)), v
);
4181 for (f
= TYPE_FIELDS (type
), nf
= 0; f
; f
= TREE_CHAIN (f
))
4183 v
= iterative_hash_name (DECL_NAME (f
), v
);
4184 v
= visit (TREE_TYPE (f
), state
, v
,
4185 sccstack
, sccstate
, sccstate_obstack
);
4189 v
= iterative_hash_hashval_t (nf
, v
);
4192 /* Record hash for us. */
4195 /* See if we found an SCC. */
4196 if (state
->low
== state
->dfsnum
)
4200 /* Pop off the SCC and set its hash values. */
4203 struct sccs
*cstate
;
4204 struct tree_int_map
*m
= ggc_alloc_cleared_tree_int_map ();
4205 x
= VEC_pop (tree
, *sccstack
);
4206 cstate
= (struct sccs
*)*pointer_map_contains (sccstate
, x
);
4207 cstate
->on_sccstack
= false;
4209 m
->to
= cstate
->u
.hash
;
4210 slot
= htab_find_slot (type_hash_cache
, m
, INSERT
);
4211 gcc_assert (!*slot
);
4217 return iterative_hash_hashval_t (v
, val
);
4221 /* Returns a hash value for P (assumed to be a type). The hash value
4222 is computed using some distinguishing features of the type. Note
4223 that we cannot use pointer hashing here as we may be dealing with
4224 two distinct instances of the same type.
4226 This function should produce the same hash value for two compatible
4227 types according to gimple_types_compatible_p. */
4230 gimple_type_hash (const void *p
)
4232 const_tree t
= (const_tree
) p
;
4233 VEC(tree
, heap
) *sccstack
= NULL
;
4234 struct pointer_map_t
*sccstate
;
4235 struct obstack sccstate_obstack
;
4238 struct tree_int_map m
;
4240 if (type_hash_cache
== NULL
)
4241 type_hash_cache
= htab_create_ggc (512, tree_int_map_hash
,
4242 tree_int_map_eq
, NULL
);
4244 m
.base
.from
= CONST_CAST_TREE (t
);
4245 if ((slot
= htab_find_slot (type_hash_cache
, &m
, NO_INSERT
))
4247 return iterative_hash_hashval_t (((struct tree_int_map
*) *slot
)->to
, 0);
4249 /* Perform a DFS walk and pre-hash all reachable types. */
4251 sccstate
= pointer_map_create ();
4252 gcc_obstack_init (&sccstate_obstack
);
4253 val
= iterative_hash_gimple_type (CONST_CAST_TREE (t
), 0,
4254 &sccstack
, sccstate
, &sccstate_obstack
);
4255 VEC_free (tree
, heap
, sccstack
);
4256 pointer_map_destroy (sccstate
);
4257 obstack_free (&sccstate_obstack
, NULL
);
4263 /* Returns nonzero if P1 and P2 are equal. */
4266 gimple_type_eq (const void *p1
, const void *p2
)
4268 const_tree t1
= (const_tree
) p1
;
4269 const_tree t2
= (const_tree
) p2
;
4270 return gimple_types_compatible_p (CONST_CAST_TREE (t1
),
4271 CONST_CAST_TREE (t2
), GTC_MERGE
);
4275 /* Register type T in the global type table gimple_types.
4276 If another type T', compatible with T, already existed in
4277 gimple_types then return T', otherwise return T. This is used by
4278 LTO to merge identical types read from different TUs. */
4281 gimple_register_type (tree t
)
4284 gimple_type_leader_entry
*leader
;
4286 gcc_assert (TYPE_P (t
));
4288 if (!gimple_type_leader
)
4289 gimple_type_leader
= ggc_alloc_cleared_vec_gimple_type_leader_entry_s
4290 (GIMPLE_TYPE_LEADER_SIZE
);
4291 /* If we registered this type before return the cached result. */
4292 leader
= &gimple_type_leader
[TYPE_UID (t
) % GIMPLE_TYPE_LEADER_SIZE
];
4293 if (leader
->type
== t
)
4294 return leader
->leader
;
4296 /* Always register the main variant first. This is important so we
4297 pick up the non-typedef variants as canonical, otherwise we'll end
4298 up taking typedef ids for structure tags during comparison. */
4299 if (TYPE_MAIN_VARIANT (t
) != t
)
4300 gimple_register_type (TYPE_MAIN_VARIANT (t
));
4302 if (gimple_types
== NULL
)
4303 gimple_types
= htab_create_ggc (16381, gimple_type_hash
, gimple_type_eq
, 0);
4305 slot
= htab_find_slot (gimple_types
, t
, INSERT
);
4307 && *(tree
*)slot
!= t
)
4309 tree new_type
= (tree
) *((tree
*) slot
);
4311 /* Do not merge types with different addressability. */
4312 gcc_assert (TREE_ADDRESSABLE (t
) == TREE_ADDRESSABLE (new_type
));
4314 /* If t is not its main variant then make t unreachable from its
4315 main variant list. Otherwise we'd queue up a lot of duplicates
4317 if (t
!= TYPE_MAIN_VARIANT (t
))
4319 tree tem
= TYPE_MAIN_VARIANT (t
);
4320 while (tem
&& TYPE_NEXT_VARIANT (tem
) != t
)
4321 tem
= TYPE_NEXT_VARIANT (tem
);
4323 TYPE_NEXT_VARIANT (tem
) = TYPE_NEXT_VARIANT (t
);
4324 TYPE_NEXT_VARIANT (t
) = NULL_TREE
;
4327 /* If we are a pointer then remove us from the pointer-to or
4328 reference-to chain. Otherwise we'd queue up a lot of duplicates
4330 if (TREE_CODE (t
) == POINTER_TYPE
)
4332 if (TYPE_POINTER_TO (TREE_TYPE (t
)) == t
)
4333 TYPE_POINTER_TO (TREE_TYPE (t
)) = TYPE_NEXT_PTR_TO (t
);
4336 tree tem
= TYPE_POINTER_TO (TREE_TYPE (t
));
4337 while (tem
&& TYPE_NEXT_PTR_TO (tem
) != t
)
4338 tem
= TYPE_NEXT_PTR_TO (tem
);
4340 TYPE_NEXT_PTR_TO (tem
) = TYPE_NEXT_PTR_TO (t
);
4342 TYPE_NEXT_PTR_TO (t
) = NULL_TREE
;
4344 else if (TREE_CODE (t
) == REFERENCE_TYPE
)
4346 if (TYPE_REFERENCE_TO (TREE_TYPE (t
)) == t
)
4347 TYPE_REFERENCE_TO (TREE_TYPE (t
)) = TYPE_NEXT_REF_TO (t
);
4350 tree tem
= TYPE_REFERENCE_TO (TREE_TYPE (t
));
4351 while (tem
&& TYPE_NEXT_REF_TO (tem
) != t
)
4352 tem
= TYPE_NEXT_REF_TO (tem
);
4354 TYPE_NEXT_REF_TO (tem
) = TYPE_NEXT_REF_TO (t
);
4356 TYPE_NEXT_REF_TO (t
) = NULL_TREE
;
4360 leader
->leader
= new_type
;
4374 /* Returns nonzero if P1 and P2 are equal. */
4377 gimple_canonical_type_eq (const void *p1
, const void *p2
)
4379 const_tree t1
= (const_tree
) p1
;
4380 const_tree t2
= (const_tree
) p2
;
4381 return gimple_types_compatible_p (CONST_CAST_TREE (t1
),
4382 CONST_CAST_TREE (t2
), GTC_DIAG
);
4385 /* Register type T in the global type table gimple_types.
4386 If another type T', compatible with T, already existed in
4387 gimple_types then return T', otherwise return T. This is used by
4388 LTO to merge identical types read from different TUs. */
4391 gimple_register_canonical_type (tree t
)
4395 gcc_assert (TYPE_P (t
));
4397 if (TYPE_CANONICAL (t
))
4398 return TYPE_CANONICAL (t
);
4400 /* Always register the main variant first. This is important so we
4401 pick up the non-typedef variants as canonical, otherwise we'll end
4402 up taking typedef ids for structure tags during comparison. */
4403 if (TYPE_MAIN_VARIANT (t
) != t
)
4404 gimple_register_canonical_type (TYPE_MAIN_VARIANT (t
));
4406 if (gimple_canonical_types
== NULL
)
4407 gimple_canonical_types
= htab_create_ggc (16381, gimple_type_hash
,
4408 gimple_canonical_type_eq
, 0);
4410 slot
= htab_find_slot (gimple_canonical_types
, t
, INSERT
);
4412 && *(tree
*)slot
!= t
)
4414 tree new_type
= (tree
) *((tree
*) slot
);
4416 TYPE_CANONICAL (t
) = new_type
;
4421 TYPE_CANONICAL (t
) = t
;
4429 /* Show statistics on references to the global type table gimple_types. */
4432 print_gimple_types_stats (void)
4435 fprintf (stderr
, "GIMPLE type table: size %ld, %ld elements, "
4436 "%ld searches, %ld collisions (ratio: %f)\n",
4437 (long) htab_size (gimple_types
),
4438 (long) htab_elements (gimple_types
),
4439 (long) gimple_types
->searches
,
4440 (long) gimple_types
->collisions
,
4441 htab_collisions (gimple_types
));
4443 fprintf (stderr
, "GIMPLE type table is empty\n");
4444 if (gimple_canonical_types
)
4445 fprintf (stderr
, "GIMPLE canonical type table: size %ld, %ld elements, "
4446 "%ld searches, %ld collisions (ratio: %f)\n",
4447 (long) htab_size (gimple_canonical_types
),
4448 (long) htab_elements (gimple_canonical_types
),
4449 (long) gimple_canonical_types
->searches
,
4450 (long) gimple_canonical_types
->collisions
,
4451 htab_collisions (gimple_canonical_types
));
4453 fprintf (stderr
, "GIMPLE canonical type table is empty\n");
4454 if (type_hash_cache
)
4455 fprintf (stderr
, "GIMPLE type hash table: size %ld, %ld elements, "
4456 "%ld searches, %ld collisions (ratio: %f)\n",
4457 (long) htab_size (type_hash_cache
),
4458 (long) htab_elements (type_hash_cache
),
4459 (long) type_hash_cache
->searches
,
4460 (long) type_hash_cache
->collisions
,
4461 htab_collisions (type_hash_cache
));
4463 fprintf (stderr
, "GIMPLE type hash table is empty\n");
4465 fprintf (stderr
, "GIMPLE type comparison table: size %ld, %ld "
4466 "elements, %ld searches, %ld collisions (ratio: %f)\n",
4467 (long) htab_size (gtc_visited
),
4468 (long) htab_elements (gtc_visited
),
4469 (long) gtc_visited
->searches
,
4470 (long) gtc_visited
->collisions
,
4471 htab_collisions (gtc_visited
));
4473 fprintf (stderr
, "GIMPLE type comparison table is empty\n");
4476 /* Free the gimple type hashtables used for LTO type merging. */
4479 free_gimple_type_tables (void)
4481 /* Last chance to print stats for the tables. */
4482 if (flag_lto_report
)
4483 print_gimple_types_stats ();
4487 htab_delete (gimple_types
);
4488 gimple_types
= NULL
;
4490 if (gimple_canonical_types
)
4492 htab_delete (gimple_canonical_types
);
4493 gimple_canonical_types
= NULL
;
4495 if (type_hash_cache
)
4497 htab_delete (type_hash_cache
);
4498 type_hash_cache
= NULL
;
4502 htab_delete (gtc_visited
);
4503 obstack_free (>c_ob
, NULL
);
4506 gimple_type_leader
= NULL
;
4510 /* Return a type the same as TYPE except unsigned or
4511 signed according to UNSIGNEDP. */
4514 gimple_signed_or_unsigned_type (bool unsignedp
, tree type
)
4518 type1
= TYPE_MAIN_VARIANT (type
);
4519 if (type1
== signed_char_type_node
4520 || type1
== char_type_node
4521 || type1
== unsigned_char_type_node
)
4522 return unsignedp
? unsigned_char_type_node
: signed_char_type_node
;
4523 if (type1
== integer_type_node
|| type1
== unsigned_type_node
)
4524 return unsignedp
? unsigned_type_node
: integer_type_node
;
4525 if (type1
== short_integer_type_node
|| type1
== short_unsigned_type_node
)
4526 return unsignedp
? short_unsigned_type_node
: short_integer_type_node
;
4527 if (type1
== long_integer_type_node
|| type1
== long_unsigned_type_node
)
4528 return unsignedp
? long_unsigned_type_node
: long_integer_type_node
;
4529 if (type1
== long_long_integer_type_node
4530 || type1
== long_long_unsigned_type_node
)
4532 ? long_long_unsigned_type_node
4533 : long_long_integer_type_node
;
4534 if (int128_integer_type_node
&& (type1
== int128_integer_type_node
|| type1
== int128_unsigned_type_node
))
4536 ? int128_unsigned_type_node
4537 : int128_integer_type_node
;
4538 #if HOST_BITS_PER_WIDE_INT >= 64
4539 if (type1
== intTI_type_node
|| type1
== unsigned_intTI_type_node
)
4540 return unsignedp
? unsigned_intTI_type_node
: intTI_type_node
;
4542 if (type1
== intDI_type_node
|| type1
== unsigned_intDI_type_node
)
4543 return unsignedp
? unsigned_intDI_type_node
: intDI_type_node
;
4544 if (type1
== intSI_type_node
|| type1
== unsigned_intSI_type_node
)
4545 return unsignedp
? unsigned_intSI_type_node
: intSI_type_node
;
4546 if (type1
== intHI_type_node
|| type1
== unsigned_intHI_type_node
)
4547 return unsignedp
? unsigned_intHI_type_node
: intHI_type_node
;
4548 if (type1
== intQI_type_node
|| type1
== unsigned_intQI_type_node
)
4549 return unsignedp
? unsigned_intQI_type_node
: intQI_type_node
;
4551 #define GIMPLE_FIXED_TYPES(NAME) \
4552 if (type1 == short_ ## NAME ## _type_node \
4553 || type1 == unsigned_short_ ## NAME ## _type_node) \
4554 return unsignedp ? unsigned_short_ ## NAME ## _type_node \
4555 : short_ ## NAME ## _type_node; \
4556 if (type1 == NAME ## _type_node \
4557 || type1 == unsigned_ ## NAME ## _type_node) \
4558 return unsignedp ? unsigned_ ## NAME ## _type_node \
4559 : NAME ## _type_node; \
4560 if (type1 == long_ ## NAME ## _type_node \
4561 || type1 == unsigned_long_ ## NAME ## _type_node) \
4562 return unsignedp ? unsigned_long_ ## NAME ## _type_node \
4563 : long_ ## NAME ## _type_node; \
4564 if (type1 == long_long_ ## NAME ## _type_node \
4565 || type1 == unsigned_long_long_ ## NAME ## _type_node) \
4566 return unsignedp ? unsigned_long_long_ ## NAME ## _type_node \
4567 : long_long_ ## NAME ## _type_node;
4569 #define GIMPLE_FIXED_MODE_TYPES(NAME) \
4570 if (type1 == NAME ## _type_node \
4571 || type1 == u ## NAME ## _type_node) \
4572 return unsignedp ? u ## NAME ## _type_node \
4573 : NAME ## _type_node;
4575 #define GIMPLE_FIXED_TYPES_SAT(NAME) \
4576 if (type1 == sat_ ## short_ ## NAME ## _type_node \
4577 || type1 == sat_ ## unsigned_short_ ## NAME ## _type_node) \
4578 return unsignedp ? sat_ ## unsigned_short_ ## NAME ## _type_node \
4579 : sat_ ## short_ ## NAME ## _type_node; \
4580 if (type1 == sat_ ## NAME ## _type_node \
4581 || type1 == sat_ ## unsigned_ ## NAME ## _type_node) \
4582 return unsignedp ? sat_ ## unsigned_ ## NAME ## _type_node \
4583 : sat_ ## NAME ## _type_node; \
4584 if (type1 == sat_ ## long_ ## NAME ## _type_node \
4585 || type1 == sat_ ## unsigned_long_ ## NAME ## _type_node) \
4586 return unsignedp ? sat_ ## unsigned_long_ ## NAME ## _type_node \
4587 : sat_ ## long_ ## NAME ## _type_node; \
4588 if (type1 == sat_ ## long_long_ ## NAME ## _type_node \
4589 || type1 == sat_ ## unsigned_long_long_ ## NAME ## _type_node) \
4590 return unsignedp ? sat_ ## unsigned_long_long_ ## NAME ## _type_node \
4591 : sat_ ## long_long_ ## NAME ## _type_node;
4593 #define GIMPLE_FIXED_MODE_TYPES_SAT(NAME) \
4594 if (type1 == sat_ ## NAME ## _type_node \
4595 || type1 == sat_ ## u ## NAME ## _type_node) \
4596 return unsignedp ? sat_ ## u ## NAME ## _type_node \
4597 : sat_ ## NAME ## _type_node;
4599 GIMPLE_FIXED_TYPES (fract
);
4600 GIMPLE_FIXED_TYPES_SAT (fract
);
4601 GIMPLE_FIXED_TYPES (accum
);
4602 GIMPLE_FIXED_TYPES_SAT (accum
);
4604 GIMPLE_FIXED_MODE_TYPES (qq
);
4605 GIMPLE_FIXED_MODE_TYPES (hq
);
4606 GIMPLE_FIXED_MODE_TYPES (sq
);
4607 GIMPLE_FIXED_MODE_TYPES (dq
);
4608 GIMPLE_FIXED_MODE_TYPES (tq
);
4609 GIMPLE_FIXED_MODE_TYPES_SAT (qq
);
4610 GIMPLE_FIXED_MODE_TYPES_SAT (hq
);
4611 GIMPLE_FIXED_MODE_TYPES_SAT (sq
);
4612 GIMPLE_FIXED_MODE_TYPES_SAT (dq
);
4613 GIMPLE_FIXED_MODE_TYPES_SAT (tq
);
4614 GIMPLE_FIXED_MODE_TYPES (ha
);
4615 GIMPLE_FIXED_MODE_TYPES (sa
);
4616 GIMPLE_FIXED_MODE_TYPES (da
);
4617 GIMPLE_FIXED_MODE_TYPES (ta
);
4618 GIMPLE_FIXED_MODE_TYPES_SAT (ha
);
4619 GIMPLE_FIXED_MODE_TYPES_SAT (sa
);
4620 GIMPLE_FIXED_MODE_TYPES_SAT (da
);
4621 GIMPLE_FIXED_MODE_TYPES_SAT (ta
);
4623 /* For ENUMERAL_TYPEs in C++, must check the mode of the types, not
4624 the precision; they have precision set to match their range, but
4625 may use a wider mode to match an ABI. If we change modes, we may
4626 wind up with bad conversions. For INTEGER_TYPEs in C, must check
4627 the precision as well, so as to yield correct results for
4628 bit-field types. C++ does not have these separate bit-field
4629 types, and producing a signed or unsigned variant of an
4630 ENUMERAL_TYPE may cause other problems as well. */
4631 if (!INTEGRAL_TYPE_P (type
)
4632 || TYPE_UNSIGNED (type
) == unsignedp
)
4635 #define TYPE_OK(node) \
4636 (TYPE_MODE (type) == TYPE_MODE (node) \
4637 && TYPE_PRECISION (type) == TYPE_PRECISION (node))
4638 if (TYPE_OK (signed_char_type_node
))
4639 return unsignedp
? unsigned_char_type_node
: signed_char_type_node
;
4640 if (TYPE_OK (integer_type_node
))
4641 return unsignedp
? unsigned_type_node
: integer_type_node
;
4642 if (TYPE_OK (short_integer_type_node
))
4643 return unsignedp
? short_unsigned_type_node
: short_integer_type_node
;
4644 if (TYPE_OK (long_integer_type_node
))
4645 return unsignedp
? long_unsigned_type_node
: long_integer_type_node
;
4646 if (TYPE_OK (long_long_integer_type_node
))
4648 ? long_long_unsigned_type_node
4649 : long_long_integer_type_node
);
4650 if (int128_integer_type_node
&& TYPE_OK (int128_integer_type_node
))
4652 ? int128_unsigned_type_node
4653 : int128_integer_type_node
);
4655 #if HOST_BITS_PER_WIDE_INT >= 64
4656 if (TYPE_OK (intTI_type_node
))
4657 return unsignedp
? unsigned_intTI_type_node
: intTI_type_node
;
4659 if (TYPE_OK (intDI_type_node
))
4660 return unsignedp
? unsigned_intDI_type_node
: intDI_type_node
;
4661 if (TYPE_OK (intSI_type_node
))
4662 return unsignedp
? unsigned_intSI_type_node
: intSI_type_node
;
4663 if (TYPE_OK (intHI_type_node
))
4664 return unsignedp
? unsigned_intHI_type_node
: intHI_type_node
;
4665 if (TYPE_OK (intQI_type_node
))
4666 return unsignedp
? unsigned_intQI_type_node
: intQI_type_node
;
4668 #undef GIMPLE_FIXED_TYPES
4669 #undef GIMPLE_FIXED_MODE_TYPES
4670 #undef GIMPLE_FIXED_TYPES_SAT
4671 #undef GIMPLE_FIXED_MODE_TYPES_SAT
4674 return build_nonstandard_integer_type (TYPE_PRECISION (type
), unsignedp
);
4678 /* Return an unsigned type the same as TYPE in other respects. */
4681 gimple_unsigned_type (tree type
)
4683 return gimple_signed_or_unsigned_type (true, type
);
4687 /* Return a signed type the same as TYPE in other respects. */
4690 gimple_signed_type (tree type
)
4692 return gimple_signed_or_unsigned_type (false, type
);
4696 /* Return the typed-based alias set for T, which may be an expression
4697 or a type. Return -1 if we don't do anything special. */
4700 gimple_get_alias_set (tree t
)
4704 /* Permit type-punning when accessing a union, provided the access
4705 is directly through the union. For example, this code does not
4706 permit taking the address of a union member and then storing
4707 through it. Even the type-punning allowed here is a GCC
4708 extension, albeit a common and useful one; the C standard says
4709 that such accesses have implementation-defined behavior. */
4711 TREE_CODE (u
) == COMPONENT_REF
|| TREE_CODE (u
) == ARRAY_REF
;
4712 u
= TREE_OPERAND (u
, 0))
4713 if (TREE_CODE (u
) == COMPONENT_REF
4714 && TREE_CODE (TREE_TYPE (TREE_OPERAND (u
, 0))) == UNION_TYPE
)
4717 /* That's all the expressions we handle specially. */
4721 /* For convenience, follow the C standard when dealing with
4722 character types. Any object may be accessed via an lvalue that
4723 has character type. */
4724 if (t
== char_type_node
4725 || t
== signed_char_type_node
4726 || t
== unsigned_char_type_node
)
4729 /* Allow aliasing between signed and unsigned variants of the same
4730 type. We treat the signed variant as canonical. */
4731 if (TREE_CODE (t
) == INTEGER_TYPE
&& TYPE_UNSIGNED (t
))
4733 tree t1
= gimple_signed_type (t
);
4735 /* t1 == t can happen for boolean nodes which are always unsigned. */
4737 return get_alias_set (t1
);
4744 /* Data structure used to count the number of dereferences to PTR
4745 inside an expression. */
4749 unsigned num_stores
;
4753 /* Helper for count_uses_and_derefs. Called by walk_tree to look for
4754 (ALIGN/MISALIGNED_)INDIRECT_REF nodes for the pointer passed in DATA. */
4757 count_ptr_derefs (tree
*tp
, int *walk_subtrees
, void *data
)
4759 struct walk_stmt_info
*wi_p
= (struct walk_stmt_info
*) data
;
4760 struct count_ptr_d
*count_p
= (struct count_ptr_d
*) wi_p
->info
;
4762 /* Do not walk inside ADDR_EXPR nodes. In the expression &ptr->fld,
4763 pointer 'ptr' is *not* dereferenced, it is simply used to compute
4764 the address of 'fld' as 'ptr + offsetof(fld)'. */
4765 if (TREE_CODE (*tp
) == ADDR_EXPR
)
4771 if (TREE_CODE (*tp
) == MEM_REF
&& TREE_OPERAND (*tp
, 0) == count_p
->ptr
)
4774 count_p
->num_stores
++;
4776 count_p
->num_loads
++;
4782 /* Count the number of direct and indirect uses for pointer PTR in
4783 statement STMT. The number of direct uses is stored in
4784 *NUM_USES_P. Indirect references are counted separately depending
4785 on whether they are store or load operations. The counts are
4786 stored in *NUM_STORES_P and *NUM_LOADS_P. */
4789 count_uses_and_derefs (tree ptr
, gimple stmt
, unsigned *num_uses_p
,
4790 unsigned *num_loads_p
, unsigned *num_stores_p
)
4799 /* Find out the total number of uses of PTR in STMT. */
4800 FOR_EACH_SSA_TREE_OPERAND (use
, stmt
, i
, SSA_OP_USE
)
4804 /* Now count the number of indirect references to PTR. This is
4805 truly awful, but we don't have much choice. There are no parent
4806 pointers inside INDIRECT_REFs, so an expression like
4807 '*x_1 = foo (x_1, *x_1)' needs to be traversed piece by piece to
4808 find all the indirect and direct uses of x_1 inside. The only
4809 shortcut we can take is the fact that GIMPLE only allows
4810 INDIRECT_REFs inside the expressions below. */
4811 if (is_gimple_assign (stmt
)
4812 || gimple_code (stmt
) == GIMPLE_RETURN
4813 || gimple_code (stmt
) == GIMPLE_ASM
4814 || is_gimple_call (stmt
))
4816 struct walk_stmt_info wi
;
4817 struct count_ptr_d count
;
4820 count
.num_stores
= 0;
4821 count
.num_loads
= 0;
4823 memset (&wi
, 0, sizeof (wi
));
4825 walk_gimple_op (stmt
, count_ptr_derefs
, &wi
);
4827 *num_stores_p
= count
.num_stores
;
4828 *num_loads_p
= count
.num_loads
;
4831 gcc_assert (*num_uses_p
>= *num_loads_p
+ *num_stores_p
);
4834 /* From a tree operand OP return the base of a load or store operation
4835 or NULL_TREE if OP is not a load or a store. */
4838 get_base_loadstore (tree op
)
4840 while (handled_component_p (op
))
4841 op
= TREE_OPERAND (op
, 0);
4843 || INDIRECT_REF_P (op
)
4844 || TREE_CODE (op
) == MEM_REF
4845 || TREE_CODE (op
) == TARGET_MEM_REF
)
4850 /* For the statement STMT call the callbacks VISIT_LOAD, VISIT_STORE and
4851 VISIT_ADDR if non-NULL on loads, store and address-taken operands
4852 passing the STMT, the base of the operand and DATA to it. The base
4853 will be either a decl, an indirect reference (including TARGET_MEM_REF)
4854 or the argument of an address expression.
4855 Returns the results of these callbacks or'ed. */
4858 walk_stmt_load_store_addr_ops (gimple stmt
, void *data
,
4859 bool (*visit_load
)(gimple
, tree
, void *),
4860 bool (*visit_store
)(gimple
, tree
, void *),
4861 bool (*visit_addr
)(gimple
, tree
, void *))
4865 if (gimple_assign_single_p (stmt
))
4870 lhs
= get_base_loadstore (gimple_assign_lhs (stmt
));
4872 ret
|= visit_store (stmt
, lhs
, data
);
4874 rhs
= gimple_assign_rhs1 (stmt
);
4875 while (handled_component_p (rhs
))
4876 rhs
= TREE_OPERAND (rhs
, 0);
4879 if (TREE_CODE (rhs
) == ADDR_EXPR
)
4880 ret
|= visit_addr (stmt
, TREE_OPERAND (rhs
, 0), data
);
4881 else if (TREE_CODE (rhs
) == TARGET_MEM_REF
4882 && TREE_CODE (TMR_BASE (rhs
)) == ADDR_EXPR
)
4883 ret
|= visit_addr (stmt
, TREE_OPERAND (TMR_BASE (rhs
), 0), data
);
4884 else if (TREE_CODE (rhs
) == OBJ_TYPE_REF
4885 && TREE_CODE (OBJ_TYPE_REF_OBJECT (rhs
)) == ADDR_EXPR
)
4886 ret
|= visit_addr (stmt
, TREE_OPERAND (OBJ_TYPE_REF_OBJECT (rhs
),
4888 lhs
= gimple_assign_lhs (stmt
);
4889 if (TREE_CODE (lhs
) == TARGET_MEM_REF
4890 && TREE_CODE (TMR_BASE (lhs
)) == ADDR_EXPR
)
4891 ret
|= visit_addr (stmt
, TREE_OPERAND (TMR_BASE (lhs
), 0), data
);
4895 rhs
= get_base_loadstore (rhs
);
4897 ret
|= visit_load (stmt
, rhs
, data
);
4901 && (is_gimple_assign (stmt
)
4902 || gimple_code (stmt
) == GIMPLE_COND
))
4904 for (i
= 0; i
< gimple_num_ops (stmt
); ++i
)
4905 if (gimple_op (stmt
, i
)
4906 && TREE_CODE (gimple_op (stmt
, i
)) == ADDR_EXPR
)
4907 ret
|= visit_addr (stmt
, TREE_OPERAND (gimple_op (stmt
, i
), 0), data
);
4909 else if (is_gimple_call (stmt
))
4913 tree lhs
= gimple_call_lhs (stmt
);
4916 lhs
= get_base_loadstore (lhs
);
4918 ret
|= visit_store (stmt
, lhs
, data
);
4921 if (visit_load
|| visit_addr
)
4922 for (i
= 0; i
< gimple_call_num_args (stmt
); ++i
)
4924 tree rhs
= gimple_call_arg (stmt
, i
);
4926 && TREE_CODE (rhs
) == ADDR_EXPR
)
4927 ret
|= visit_addr (stmt
, TREE_OPERAND (rhs
, 0), data
);
4928 else if (visit_load
)
4930 rhs
= get_base_loadstore (rhs
);
4932 ret
|= visit_load (stmt
, rhs
, data
);
4936 && gimple_call_chain (stmt
)
4937 && TREE_CODE (gimple_call_chain (stmt
)) == ADDR_EXPR
)
4938 ret
|= visit_addr (stmt
, TREE_OPERAND (gimple_call_chain (stmt
), 0),
4941 && gimple_call_return_slot_opt_p (stmt
)
4942 && gimple_call_lhs (stmt
) != NULL_TREE
4943 && TREE_ADDRESSABLE (TREE_TYPE (gimple_call_lhs (stmt
))))
4944 ret
|= visit_addr (stmt
, gimple_call_lhs (stmt
), data
);
4946 else if (gimple_code (stmt
) == GIMPLE_ASM
)
4949 const char *constraint
;
4950 const char **oconstraints
;
4951 bool allows_mem
, allows_reg
, is_inout
;
4952 noutputs
= gimple_asm_noutputs (stmt
);
4953 oconstraints
= XALLOCAVEC (const char *, noutputs
);
4954 if (visit_store
|| visit_addr
)
4955 for (i
= 0; i
< gimple_asm_noutputs (stmt
); ++i
)
4957 tree link
= gimple_asm_output_op (stmt
, i
);
4958 tree op
= get_base_loadstore (TREE_VALUE (link
));
4959 if (op
&& visit_store
)
4960 ret
|= visit_store (stmt
, op
, data
);
4963 constraint
= TREE_STRING_POINTER
4964 (TREE_VALUE (TREE_PURPOSE (link
)));
4965 oconstraints
[i
] = constraint
;
4966 parse_output_constraint (&constraint
, i
, 0, 0, &allows_mem
,
4967 &allows_reg
, &is_inout
);
4968 if (op
&& !allows_reg
&& allows_mem
)
4969 ret
|= visit_addr (stmt
, op
, data
);
4972 if (visit_load
|| visit_addr
)
4973 for (i
= 0; i
< gimple_asm_ninputs (stmt
); ++i
)
4975 tree link
= gimple_asm_input_op (stmt
, i
);
4976 tree op
= TREE_VALUE (link
);
4978 && TREE_CODE (op
) == ADDR_EXPR
)
4979 ret
|= visit_addr (stmt
, TREE_OPERAND (op
, 0), data
);
4980 else if (visit_load
|| visit_addr
)
4982 op
= get_base_loadstore (op
);
4986 ret
|= visit_load (stmt
, op
, data
);
4989 constraint
= TREE_STRING_POINTER
4990 (TREE_VALUE (TREE_PURPOSE (link
)));
4991 parse_input_constraint (&constraint
, 0, 0, noutputs
,
4993 &allows_mem
, &allows_reg
);
4994 if (!allows_reg
&& allows_mem
)
4995 ret
|= visit_addr (stmt
, op
, data
);
5001 else if (gimple_code (stmt
) == GIMPLE_RETURN
)
5003 tree op
= gimple_return_retval (stmt
);
5007 && TREE_CODE (op
) == ADDR_EXPR
)
5008 ret
|= visit_addr (stmt
, TREE_OPERAND (op
, 0), data
);
5009 else if (visit_load
)
5011 op
= get_base_loadstore (op
);
5013 ret
|= visit_load (stmt
, op
, data
);
5018 && gimple_code (stmt
) == GIMPLE_PHI
)
5020 for (i
= 0; i
< gimple_phi_num_args (stmt
); ++i
)
5022 tree op
= PHI_ARG_DEF (stmt
, i
);
5023 if (TREE_CODE (op
) == ADDR_EXPR
)
5024 ret
|= visit_addr (stmt
, TREE_OPERAND (op
, 0), data
);
5031 /* Like walk_stmt_load_store_addr_ops but with NULL visit_addr. IPA-CP
5032 should make a faster clone for this case. */
5035 walk_stmt_load_store_ops (gimple stmt
, void *data
,
5036 bool (*visit_load
)(gimple
, tree
, void *),
5037 bool (*visit_store
)(gimple
, tree
, void *))
5039 return walk_stmt_load_store_addr_ops (stmt
, data
,
5040 visit_load
, visit_store
, NULL
);
5043 /* Helper for gimple_ior_addresses_taken_1. */
5046 gimple_ior_addresses_taken_1 (gimple stmt ATTRIBUTE_UNUSED
,
5047 tree addr
, void *data
)
5049 bitmap addresses_taken
= (bitmap
)data
;
5050 addr
= get_base_address (addr
);
5054 bitmap_set_bit (addresses_taken
, DECL_UID (addr
));
5060 /* Set the bit for the uid of all decls that have their address taken
5061 in STMT in the ADDRESSES_TAKEN bitmap. Returns true if there
5062 were any in this stmt. */
5065 gimple_ior_addresses_taken (bitmap addresses_taken
, gimple stmt
)
5067 return walk_stmt_load_store_addr_ops (stmt
, addresses_taken
, NULL
, NULL
,
5068 gimple_ior_addresses_taken_1
);
5072 /* Return a printable name for symbol DECL. */
5075 gimple_decl_printable_name (tree decl
, int verbosity
)
5077 if (!DECL_NAME (decl
))
5080 if (DECL_ASSEMBLER_NAME_SET_P (decl
))
5082 const char *str
, *mangled_str
;
5083 int dmgl_opts
= DMGL_NO_OPTS
;
5087 dmgl_opts
= DMGL_VERBOSE
5091 if (TREE_CODE (decl
) == FUNCTION_DECL
)
5092 dmgl_opts
|= DMGL_PARAMS
;
5095 mangled_str
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
));
5096 str
= cplus_demangle_v3 (mangled_str
, dmgl_opts
);
5097 return (str
) ? str
: mangled_str
;
5100 return IDENTIFIER_POINTER (DECL_NAME (decl
));
5103 /* Return true when STMT is builtins call to CODE. */
5106 gimple_call_builtin_p (gimple stmt
, enum built_in_function code
)
5109 return (is_gimple_call (stmt
)
5110 && (fndecl
= gimple_call_fndecl (stmt
)) != NULL
5111 && DECL_BUILT_IN_CLASS (fndecl
) == BUILT_IN_NORMAL
5112 && DECL_FUNCTION_CODE (fndecl
) == code
);
5115 #include "gt-gimple.h"