1 /* Language-independent node constructors for parse phase of GNU compiler.
2 Copyright (C) 1987-2014 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
20 /* This file contains the low level primitives for operating on tree nodes,
21 including allocation, list operations, interning of identifiers,
22 construction of data type nodes and statement nodes,
23 and construction of type conversion nodes. It also contains
24 tables index by tree code that describe how to take apart
27 It is intended to be language-independent, but occasionally
28 calls language-dependent routines defined (for C) in typecheck.c. */
32 #include "coretypes.h"
36 #include "stor-layout.h"
43 #include "toplev.h" /* get_random_seed */
46 #include "filenames.h"
49 #include "common/common-target.h"
50 #include "langhooks.h"
51 #include "tree-inline.h"
52 #include "tree-iterator.h"
53 #include "basic-block.h"
55 #include "tree-ssa-alias.h"
56 #include "internal-fn.h"
57 #include "gimple-expr.h"
60 #include "gimple-iterator.h"
62 #include "gimple-ssa.h"
64 #include "tree-phinodes.h"
65 #include "stringpool.h"
66 #include "tree-ssanames.h"
70 #include "tree-pass.h"
71 #include "langhooks-def.h"
72 #include "diagnostic.h"
73 #include "tree-diagnostic.h"
74 #include "tree-pretty-print.h"
81 /* Tree code classes. */
83 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
84 #define END_OF_BASE_TREE_CODES tcc_exceptional,
86 const enum tree_code_class tree_code_type
[] = {
87 #include "all-tree.def"
91 #undef END_OF_BASE_TREE_CODES
93 /* Table indexed by tree code giving number of expression
94 operands beyond the fixed part of the node structure.
95 Not used for types or decls. */
97 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
98 #define END_OF_BASE_TREE_CODES 0,
100 const unsigned char tree_code_length
[] = {
101 #include "all-tree.def"
105 #undef END_OF_BASE_TREE_CODES
107 /* Names of tree components.
108 Used for printing out the tree and error messages. */
109 #define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
110 #define END_OF_BASE_TREE_CODES "@dummy",
112 static const char *const tree_code_name
[] = {
113 #include "all-tree.def"
117 #undef END_OF_BASE_TREE_CODES
119 /* Each tree code class has an associated string representation.
120 These must correspond to the tree_code_class entries. */
122 const char *const tree_code_class_strings
[] =
137 /* obstack.[ch] explicitly declined to prototype this. */
138 extern int _obstack_allocated_p (struct obstack
*h
, void *obj
);
140 /* Statistics-gathering stuff. */
142 static int tree_code_counts
[MAX_TREE_CODES
];
143 int tree_node_counts
[(int) all_kinds
];
144 int tree_node_sizes
[(int) all_kinds
];
146 /* Keep in sync with tree.h:enum tree_node_kind. */
147 static const char * const tree_node_kind_names
[] = {
166 /* Unique id for next decl created. */
167 static GTY(()) int next_decl_uid
;
168 /* Unique id for next type created. */
169 static GTY(()) int next_type_uid
= 1;
170 /* Unique id for next debug decl created. Use negative numbers,
171 to catch erroneous uses. */
172 static GTY(()) int next_debug_decl_uid
;
174 /* Since we cannot rehash a type after it is in the table, we have to
175 keep the hash code. */
177 struct GTY(()) type_hash
{
182 /* Initial size of the hash table (rounded to next prime). */
183 #define TYPE_HASH_INITIAL_SIZE 1000
185 /* Now here is the hash table. When recording a type, it is added to
186 the slot whose index is the hash code. Note that the hash table is
187 used for several kinds of types (function types, array types and
188 array index range types, for now). While all these live in the
189 same table, they are completely independent, and the hash code is
190 computed differently for each of these. */
192 static GTY ((if_marked ("type_hash_marked_p"), param_is (struct type_hash
)))
193 htab_t type_hash_table
;
195 /* Hash table and temporary node for larger integer const values. */
196 static GTY (()) tree int_cst_node
;
197 static GTY ((if_marked ("ggc_marked_p"), param_is (union tree_node
)))
198 htab_t int_cst_hash_table
;
200 /* Hash table for optimization flags and target option flags. Use the same
201 hash table for both sets of options. Nodes for building the current
202 optimization and target option nodes. The assumption is most of the time
203 the options created will already be in the hash table, so we avoid
204 allocating and freeing up a node repeatably. */
205 static GTY (()) tree cl_optimization_node
;
206 static GTY (()) tree cl_target_option_node
;
207 static GTY ((if_marked ("ggc_marked_p"), param_is (union tree_node
)))
208 htab_t cl_option_hash_table
;
210 /* General tree->tree mapping structure for use in hash tables. */
213 static GTY ((if_marked ("tree_decl_map_marked_p"), param_is (struct tree_decl_map
)))
214 htab_t debug_expr_for_decl
;
216 static GTY ((if_marked ("tree_decl_map_marked_p"), param_is (struct tree_decl_map
)))
217 htab_t value_expr_for_decl
;
219 static GTY ((if_marked ("tree_vec_map_marked_p"), param_is (struct tree_vec_map
)))
220 htab_t debug_args_for_decl
;
222 static void set_type_quals (tree
, int);
223 static int type_hash_eq (const void *, const void *);
224 static hashval_t
type_hash_hash (const void *);
225 static hashval_t
int_cst_hash_hash (const void *);
226 static int int_cst_hash_eq (const void *, const void *);
227 static hashval_t
cl_option_hash_hash (const void *);
228 static int cl_option_hash_eq (const void *, const void *);
229 static void print_type_hash_statistics (void);
230 static void print_debug_expr_statistics (void);
231 static void print_value_expr_statistics (void);
232 static int type_hash_marked_p (const void *);
233 static void type_hash_list (const_tree
, inchash::hash
&);
234 static void attribute_hash_list (const_tree
, inchash::hash
&);
236 tree global_trees
[TI_MAX
];
237 tree integer_types
[itk_none
];
239 unsigned char tree_contains_struct
[MAX_TREE_CODES
][64];
241 /* Number of operands for each OpenMP clause. */
242 unsigned const char omp_clause_num_ops
[] =
244 0, /* OMP_CLAUSE_ERROR */
245 1, /* OMP_CLAUSE_PRIVATE */
246 1, /* OMP_CLAUSE_SHARED */
247 1, /* OMP_CLAUSE_FIRSTPRIVATE */
248 2, /* OMP_CLAUSE_LASTPRIVATE */
249 4, /* OMP_CLAUSE_REDUCTION */
250 1, /* OMP_CLAUSE_COPYIN */
251 1, /* OMP_CLAUSE_COPYPRIVATE */
252 3, /* OMP_CLAUSE_LINEAR */
253 2, /* OMP_CLAUSE_ALIGNED */
254 1, /* OMP_CLAUSE_DEPEND */
255 1, /* OMP_CLAUSE_UNIFORM */
256 2, /* OMP_CLAUSE_FROM */
257 2, /* OMP_CLAUSE_TO */
258 2, /* OMP_CLAUSE_MAP */
259 1, /* OMP_CLAUSE__LOOPTEMP_ */
260 1, /* OMP_CLAUSE_IF */
261 1, /* OMP_CLAUSE_NUM_THREADS */
262 1, /* OMP_CLAUSE_SCHEDULE */
263 0, /* OMP_CLAUSE_NOWAIT */
264 0, /* OMP_CLAUSE_ORDERED */
265 0, /* OMP_CLAUSE_DEFAULT */
266 3, /* OMP_CLAUSE_COLLAPSE */
267 0, /* OMP_CLAUSE_UNTIED */
268 1, /* OMP_CLAUSE_FINAL */
269 0, /* OMP_CLAUSE_MERGEABLE */
270 1, /* OMP_CLAUSE_DEVICE */
271 1, /* OMP_CLAUSE_DIST_SCHEDULE */
272 0, /* OMP_CLAUSE_INBRANCH */
273 0, /* OMP_CLAUSE_NOTINBRANCH */
274 1, /* OMP_CLAUSE_NUM_TEAMS */
275 1, /* OMP_CLAUSE_THREAD_LIMIT */
276 0, /* OMP_CLAUSE_PROC_BIND */
277 1, /* OMP_CLAUSE_SAFELEN */
278 1, /* OMP_CLAUSE_SIMDLEN */
279 0, /* OMP_CLAUSE_FOR */
280 0, /* OMP_CLAUSE_PARALLEL */
281 0, /* OMP_CLAUSE_SECTIONS */
282 0, /* OMP_CLAUSE_TASKGROUP */
283 1, /* OMP_CLAUSE__SIMDUID_ */
286 const char * const omp_clause_code_name
[] =
331 /* Return the tree node structure used by tree code CODE. */
333 static inline enum tree_node_structure_enum
334 tree_node_structure_for_code (enum tree_code code
)
336 switch (TREE_CODE_CLASS (code
))
338 case tcc_declaration
:
343 return TS_FIELD_DECL
;
349 return TS_LABEL_DECL
;
351 return TS_RESULT_DECL
;
352 case DEBUG_EXPR_DECL
:
355 return TS_CONST_DECL
;
359 return TS_FUNCTION_DECL
;
360 case TRANSLATION_UNIT_DECL
:
361 return TS_TRANSLATION_UNIT_DECL
;
363 return TS_DECL_NON_COMMON
;
367 return TS_TYPE_NON_COMMON
;
376 default: /* tcc_constant and tcc_exceptional */
381 /* tcc_constant cases. */
382 case VOID_CST
: return TS_TYPED
;
383 case INTEGER_CST
: return TS_INT_CST
;
384 case REAL_CST
: return TS_REAL_CST
;
385 case FIXED_CST
: return TS_FIXED_CST
;
386 case COMPLEX_CST
: return TS_COMPLEX
;
387 case VECTOR_CST
: return TS_VECTOR
;
388 case STRING_CST
: return TS_STRING
;
389 /* tcc_exceptional cases. */
390 case ERROR_MARK
: return TS_COMMON
;
391 case IDENTIFIER_NODE
: return TS_IDENTIFIER
;
392 case TREE_LIST
: return TS_LIST
;
393 case TREE_VEC
: return TS_VEC
;
394 case SSA_NAME
: return TS_SSA_NAME
;
395 case PLACEHOLDER_EXPR
: return TS_COMMON
;
396 case STATEMENT_LIST
: return TS_STATEMENT_LIST
;
397 case BLOCK
: return TS_BLOCK
;
398 case CONSTRUCTOR
: return TS_CONSTRUCTOR
;
399 case TREE_BINFO
: return TS_BINFO
;
400 case OMP_CLAUSE
: return TS_OMP_CLAUSE
;
401 case OPTIMIZATION_NODE
: return TS_OPTIMIZATION
;
402 case TARGET_OPTION_NODE
: return TS_TARGET_OPTION
;
410 /* Initialize tree_contains_struct to describe the hierarchy of tree
414 initialize_tree_contains_struct (void)
418 for (i
= ERROR_MARK
; i
< LAST_AND_UNUSED_TREE_CODE
; i
++)
421 enum tree_node_structure_enum ts_code
;
423 code
= (enum tree_code
) i
;
424 ts_code
= tree_node_structure_for_code (code
);
426 /* Mark the TS structure itself. */
427 tree_contains_struct
[code
][ts_code
] = 1;
429 /* Mark all the structures that TS is derived from. */
447 case TS_STATEMENT_LIST
:
448 MARK_TS_TYPED (code
);
452 case TS_DECL_MINIMAL
:
458 case TS_OPTIMIZATION
:
459 case TS_TARGET_OPTION
:
460 MARK_TS_COMMON (code
);
463 case TS_TYPE_WITH_LANG_SPECIFIC
:
464 MARK_TS_TYPE_COMMON (code
);
467 case TS_TYPE_NON_COMMON
:
468 MARK_TS_TYPE_WITH_LANG_SPECIFIC (code
);
472 MARK_TS_DECL_MINIMAL (code
);
477 MARK_TS_DECL_COMMON (code
);
480 case TS_DECL_NON_COMMON
:
481 MARK_TS_DECL_WITH_VIS (code
);
484 case TS_DECL_WITH_VIS
:
488 MARK_TS_DECL_WRTL (code
);
492 MARK_TS_DECL_COMMON (code
);
496 MARK_TS_DECL_WITH_VIS (code
);
500 case TS_FUNCTION_DECL
:
501 MARK_TS_DECL_NON_COMMON (code
);
504 case TS_TRANSLATION_UNIT_DECL
:
505 MARK_TS_DECL_COMMON (code
);
513 /* Basic consistency checks for attributes used in fold. */
514 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_NON_COMMON
]);
515 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_NON_COMMON
]);
516 gcc_assert (tree_contains_struct
[CONST_DECL
][TS_DECL_COMMON
]);
517 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_COMMON
]);
518 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_DECL_COMMON
]);
519 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_DECL_COMMON
]);
520 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_COMMON
]);
521 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_COMMON
]);
522 gcc_assert (tree_contains_struct
[TRANSLATION_UNIT_DECL
][TS_DECL_COMMON
]);
523 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_DECL_COMMON
]);
524 gcc_assert (tree_contains_struct
[FIELD_DECL
][TS_DECL_COMMON
]);
525 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_WRTL
]);
526 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_DECL_WRTL
]);
527 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_DECL_WRTL
]);
528 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_WRTL
]);
529 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_DECL_WRTL
]);
530 gcc_assert (tree_contains_struct
[CONST_DECL
][TS_DECL_MINIMAL
]);
531 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_MINIMAL
]);
532 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_DECL_MINIMAL
]);
533 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_DECL_MINIMAL
]);
534 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_MINIMAL
]);
535 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_MINIMAL
]);
536 gcc_assert (tree_contains_struct
[TRANSLATION_UNIT_DECL
][TS_DECL_MINIMAL
]);
537 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_DECL_MINIMAL
]);
538 gcc_assert (tree_contains_struct
[FIELD_DECL
][TS_DECL_MINIMAL
]);
539 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_WITH_VIS
]);
540 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_WITH_VIS
]);
541 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_WITH_VIS
]);
542 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_VAR_DECL
]);
543 gcc_assert (tree_contains_struct
[FIELD_DECL
][TS_FIELD_DECL
]);
544 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_PARM_DECL
]);
545 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_LABEL_DECL
]);
546 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_RESULT_DECL
]);
547 gcc_assert (tree_contains_struct
[CONST_DECL
][TS_CONST_DECL
]);
548 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_TYPE_DECL
]);
549 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_FUNCTION_DECL
]);
550 gcc_assert (tree_contains_struct
[IMPORTED_DECL
][TS_DECL_MINIMAL
]);
551 gcc_assert (tree_contains_struct
[IMPORTED_DECL
][TS_DECL_COMMON
]);
552 gcc_assert (tree_contains_struct
[NAMELIST_DECL
][TS_DECL_MINIMAL
]);
553 gcc_assert (tree_contains_struct
[NAMELIST_DECL
][TS_DECL_COMMON
]);
562 /* Initialize the hash table of types. */
563 type_hash_table
= htab_create_ggc (TYPE_HASH_INITIAL_SIZE
, type_hash_hash
,
566 debug_expr_for_decl
= htab_create_ggc (512, tree_decl_map_hash
,
567 tree_decl_map_eq
, 0);
569 value_expr_for_decl
= htab_create_ggc (512, tree_decl_map_hash
,
570 tree_decl_map_eq
, 0);
572 int_cst_hash_table
= htab_create_ggc (1024, int_cst_hash_hash
,
573 int_cst_hash_eq
, NULL
);
575 int_cst_node
= make_int_cst (1, 1);
577 cl_option_hash_table
= htab_create_ggc (64, cl_option_hash_hash
,
578 cl_option_hash_eq
, NULL
);
580 cl_optimization_node
= make_node (OPTIMIZATION_NODE
);
581 cl_target_option_node
= make_node (TARGET_OPTION_NODE
);
583 /* Initialize the tree_contains_struct array. */
584 initialize_tree_contains_struct ();
585 lang_hooks
.init_ts ();
589 /* The name of the object as the assembler will see it (but before any
590 translations made by ASM_OUTPUT_LABELREF). Often this is the same
591 as DECL_NAME. It is an IDENTIFIER_NODE. */
593 decl_assembler_name (tree decl
)
595 if (!DECL_ASSEMBLER_NAME_SET_P (decl
))
596 lang_hooks
.set_decl_assembler_name (decl
);
597 return DECL_WITH_VIS_CHECK (decl
)->decl_with_vis
.assembler_name
;
600 /* When the target supports COMDAT groups, this indicates which group the
601 DECL is associated with. This can be either an IDENTIFIER_NODE or a
602 decl, in which case its DECL_ASSEMBLER_NAME identifies the group. */
604 decl_comdat_group (const_tree node
)
606 struct symtab_node
*snode
= symtab_node::get (node
);
609 return snode
->get_comdat_group ();
612 /* Likewise, but make sure it's been reduced to an IDENTIFIER_NODE. */
614 decl_comdat_group_id (const_tree node
)
616 struct symtab_node
*snode
= symtab_node::get (node
);
619 return snode
->get_comdat_group_id ();
622 /* When the target supports named section, return its name as IDENTIFIER_NODE
623 or NULL if it is in no section. */
625 decl_section_name (const_tree node
)
627 struct symtab_node
*snode
= symtab_node::get (node
);
630 return snode
->get_section ();
633 /* Set section section name of NODE to VALUE (that is expected to
634 be identifier node) */
636 set_decl_section_name (tree node
, const char *value
)
638 struct symtab_node
*snode
;
642 snode
= symtab_node::get (node
);
646 else if (TREE_CODE (node
) == VAR_DECL
)
647 snode
= varpool_node::get_create (node
);
649 snode
= cgraph_node::get_create (node
);
650 snode
->set_section (value
);
653 /* Return TLS model of a variable NODE. */
655 decl_tls_model (const_tree node
)
657 struct varpool_node
*snode
= varpool_node::get (node
);
659 return TLS_MODEL_NONE
;
660 return snode
->tls_model
;
663 /* Set TLS model of variable NODE to MODEL. */
665 set_decl_tls_model (tree node
, enum tls_model model
)
667 struct varpool_node
*vnode
;
669 if (model
== TLS_MODEL_NONE
)
671 vnode
= varpool_node::get (node
);
676 vnode
= varpool_node::get_create (node
);
677 vnode
->tls_model
= model
;
680 /* Compute the number of bytes occupied by a tree with code CODE.
681 This function cannot be used for nodes that have variable sizes,
682 including TREE_VEC, INTEGER_CST, STRING_CST, and CALL_EXPR. */
684 tree_code_size (enum tree_code code
)
686 switch (TREE_CODE_CLASS (code
))
688 case tcc_declaration
: /* A decl node */
693 return sizeof (struct tree_field_decl
);
695 return sizeof (struct tree_parm_decl
);
697 return sizeof (struct tree_var_decl
);
699 return sizeof (struct tree_label_decl
);
701 return sizeof (struct tree_result_decl
);
703 return sizeof (struct tree_const_decl
);
705 return sizeof (struct tree_type_decl
);
707 return sizeof (struct tree_function_decl
);
708 case DEBUG_EXPR_DECL
:
709 return sizeof (struct tree_decl_with_rtl
);
710 case TRANSLATION_UNIT_DECL
:
711 return sizeof (struct tree_translation_unit_decl
);
715 return sizeof (struct tree_decl_non_common
);
717 return lang_hooks
.tree_size (code
);
721 case tcc_type
: /* a type node */
722 return sizeof (struct tree_type_non_common
);
724 case tcc_reference
: /* a reference */
725 case tcc_expression
: /* an expression */
726 case tcc_statement
: /* an expression with side effects */
727 case tcc_comparison
: /* a comparison expression */
728 case tcc_unary
: /* a unary arithmetic expression */
729 case tcc_binary
: /* a binary arithmetic expression */
730 return (sizeof (struct tree_exp
)
731 + (TREE_CODE_LENGTH (code
) - 1) * sizeof (tree
));
733 case tcc_constant
: /* a constant */
736 case VOID_CST
: return sizeof (struct tree_typed
);
737 case INTEGER_CST
: gcc_unreachable ();
738 case REAL_CST
: return sizeof (struct tree_real_cst
);
739 case FIXED_CST
: return sizeof (struct tree_fixed_cst
);
740 case COMPLEX_CST
: return sizeof (struct tree_complex
);
741 case VECTOR_CST
: return sizeof (struct tree_vector
);
742 case STRING_CST
: gcc_unreachable ();
744 return lang_hooks
.tree_size (code
);
747 case tcc_exceptional
: /* something random, like an identifier. */
750 case IDENTIFIER_NODE
: return lang_hooks
.identifier_size
;
751 case TREE_LIST
: return sizeof (struct tree_list
);
754 case PLACEHOLDER_EXPR
: return sizeof (struct tree_common
);
757 case OMP_CLAUSE
: gcc_unreachable ();
759 case SSA_NAME
: return sizeof (struct tree_ssa_name
);
761 case STATEMENT_LIST
: return sizeof (struct tree_statement_list
);
762 case BLOCK
: return sizeof (struct tree_block
);
763 case CONSTRUCTOR
: return sizeof (struct tree_constructor
);
764 case OPTIMIZATION_NODE
: return sizeof (struct tree_optimization_option
);
765 case TARGET_OPTION_NODE
: return sizeof (struct tree_target_option
);
768 return lang_hooks
.tree_size (code
);
776 /* Compute the number of bytes occupied by NODE. This routine only
777 looks at TREE_CODE, except for those nodes that have variable sizes. */
779 tree_size (const_tree node
)
781 const enum tree_code code
= TREE_CODE (node
);
785 return (sizeof (struct tree_int_cst
)
786 + (TREE_INT_CST_EXT_NUNITS (node
) - 1) * sizeof (HOST_WIDE_INT
));
789 return (offsetof (struct tree_binfo
, base_binfos
)
791 ::embedded_size (BINFO_N_BASE_BINFOS (node
)));
794 return (sizeof (struct tree_vec
)
795 + (TREE_VEC_LENGTH (node
) - 1) * sizeof (tree
));
798 return (sizeof (struct tree_vector
)
799 + (TYPE_VECTOR_SUBPARTS (TREE_TYPE (node
)) - 1) * sizeof (tree
));
802 return TREE_STRING_LENGTH (node
) + offsetof (struct tree_string
, str
) + 1;
805 return (sizeof (struct tree_omp_clause
)
806 + (omp_clause_num_ops
[OMP_CLAUSE_CODE (node
)] - 1)
810 if (TREE_CODE_CLASS (code
) == tcc_vl_exp
)
811 return (sizeof (struct tree_exp
)
812 + (VL_EXP_OPERAND_LENGTH (node
) - 1) * sizeof (tree
));
814 return tree_code_size (code
);
818 /* Record interesting allocation statistics for a tree node with CODE
822 record_node_allocation_statistics (enum tree_code code ATTRIBUTE_UNUSED
,
823 size_t length ATTRIBUTE_UNUSED
)
825 enum tree_code_class type
= TREE_CODE_CLASS (code
);
828 if (!GATHER_STATISTICS
)
833 case tcc_declaration
: /* A decl node */
837 case tcc_type
: /* a type node */
841 case tcc_statement
: /* an expression with side effects */
845 case tcc_reference
: /* a reference */
849 case tcc_expression
: /* an expression */
850 case tcc_comparison
: /* a comparison expression */
851 case tcc_unary
: /* a unary arithmetic expression */
852 case tcc_binary
: /* a binary arithmetic expression */
856 case tcc_constant
: /* a constant */
860 case tcc_exceptional
: /* something random, like an identifier. */
863 case IDENTIFIER_NODE
:
876 kind
= ssa_name_kind
;
888 kind
= omp_clause_kind
;
905 tree_code_counts
[(int) code
]++;
906 tree_node_counts
[(int) kind
]++;
907 tree_node_sizes
[(int) kind
] += length
;
910 /* Allocate and return a new UID from the DECL_UID namespace. */
913 allocate_decl_uid (void)
915 return next_decl_uid
++;
918 /* Return a newly allocated node of code CODE. For decl and type
919 nodes, some other fields are initialized. The rest of the node is
920 initialized to zero. This function cannot be used for TREE_VEC,
921 INTEGER_CST or OMP_CLAUSE nodes, which is enforced by asserts in
924 Achoo! I got a code in the node. */
927 make_node_stat (enum tree_code code MEM_STAT_DECL
)
930 enum tree_code_class type
= TREE_CODE_CLASS (code
);
931 size_t length
= tree_code_size (code
);
933 record_node_allocation_statistics (code
, length
);
935 t
= ggc_alloc_cleared_tree_node_stat (length PASS_MEM_STAT
);
936 TREE_SET_CODE (t
, code
);
941 TREE_SIDE_EFFECTS (t
) = 1;
944 case tcc_declaration
:
945 if (CODE_CONTAINS_STRUCT (code
, TS_DECL_COMMON
))
947 if (code
== FUNCTION_DECL
)
949 DECL_ALIGN (t
) = FUNCTION_BOUNDARY
;
950 DECL_MODE (t
) = FUNCTION_MODE
;
955 DECL_SOURCE_LOCATION (t
) = input_location
;
956 if (TREE_CODE (t
) == DEBUG_EXPR_DECL
)
957 DECL_UID (t
) = --next_debug_decl_uid
;
960 DECL_UID (t
) = allocate_decl_uid ();
961 SET_DECL_PT_UID (t
, -1);
963 if (TREE_CODE (t
) == LABEL_DECL
)
964 LABEL_DECL_UID (t
) = -1;
969 TYPE_UID (t
) = next_type_uid
++;
970 TYPE_ALIGN (t
) = BITS_PER_UNIT
;
971 TYPE_USER_ALIGN (t
) = 0;
972 TYPE_MAIN_VARIANT (t
) = t
;
973 TYPE_CANONICAL (t
) = t
;
975 /* Default to no attributes for type, but let target change that. */
976 TYPE_ATTRIBUTES (t
) = NULL_TREE
;
977 targetm
.set_default_type_attributes (t
);
979 /* We have not yet computed the alias set for this type. */
980 TYPE_ALIAS_SET (t
) = -1;
984 TREE_CONSTANT (t
) = 1;
993 case PREDECREMENT_EXPR
:
994 case PREINCREMENT_EXPR
:
995 case POSTDECREMENT_EXPR
:
996 case POSTINCREMENT_EXPR
:
997 /* All of these have side-effects, no matter what their
999 TREE_SIDE_EFFECTS (t
) = 1;
1008 /* Other classes need no special treatment. */
1015 /* Return a new node with the same contents as NODE except that its
1016 TREE_CHAIN, if it has one, is zero and it has a fresh uid. */
1019 copy_node_stat (tree node MEM_STAT_DECL
)
1022 enum tree_code code
= TREE_CODE (node
);
1025 gcc_assert (code
!= STATEMENT_LIST
);
1027 length
= tree_size (node
);
1028 record_node_allocation_statistics (code
, length
);
1029 t
= ggc_alloc_tree_node_stat (length PASS_MEM_STAT
);
1030 memcpy (t
, node
, length
);
1032 if (CODE_CONTAINS_STRUCT (code
, TS_COMMON
))
1034 TREE_ASM_WRITTEN (t
) = 0;
1035 TREE_VISITED (t
) = 0;
1037 if (TREE_CODE_CLASS (code
) == tcc_declaration
)
1039 if (code
== DEBUG_EXPR_DECL
)
1040 DECL_UID (t
) = --next_debug_decl_uid
;
1043 DECL_UID (t
) = allocate_decl_uid ();
1044 if (DECL_PT_UID_SET_P (node
))
1045 SET_DECL_PT_UID (t
, DECL_PT_UID (node
));
1047 if ((TREE_CODE (node
) == PARM_DECL
|| TREE_CODE (node
) == VAR_DECL
)
1048 && DECL_HAS_VALUE_EXPR_P (node
))
1050 SET_DECL_VALUE_EXPR (t
, DECL_VALUE_EXPR (node
));
1051 DECL_HAS_VALUE_EXPR_P (t
) = 1;
1053 /* DECL_DEBUG_EXPR is copied explicitely by callers. */
1054 if (TREE_CODE (node
) == VAR_DECL
)
1056 DECL_HAS_DEBUG_EXPR_P (t
) = 0;
1057 t
->decl_with_vis
.symtab_node
= NULL
;
1059 if (TREE_CODE (node
) == VAR_DECL
&& DECL_HAS_INIT_PRIORITY_P (node
))
1061 SET_DECL_INIT_PRIORITY (t
, DECL_INIT_PRIORITY (node
));
1062 DECL_HAS_INIT_PRIORITY_P (t
) = 1;
1064 if (TREE_CODE (node
) == FUNCTION_DECL
)
1066 DECL_STRUCT_FUNCTION (t
) = NULL
;
1067 t
->decl_with_vis
.symtab_node
= NULL
;
1070 else if (TREE_CODE_CLASS (code
) == tcc_type
)
1072 TYPE_UID (t
) = next_type_uid
++;
1073 /* The following is so that the debug code for
1074 the copy is different from the original type.
1075 The two statements usually duplicate each other
1076 (because they clear fields of the same union),
1077 but the optimizer should catch that. */
1078 TYPE_SYMTAB_POINTER (t
) = 0;
1079 TYPE_SYMTAB_ADDRESS (t
) = 0;
1081 /* Do not copy the values cache. */
1082 if (TYPE_CACHED_VALUES_P (t
))
1084 TYPE_CACHED_VALUES_P (t
) = 0;
1085 TYPE_CACHED_VALUES (t
) = NULL_TREE
;
1092 /* Return a copy of a chain of nodes, chained through the TREE_CHAIN field.
1093 For example, this can copy a list made of TREE_LIST nodes. */
1096 copy_list (tree list
)
1104 head
= prev
= copy_node (list
);
1105 next
= TREE_CHAIN (list
);
1108 TREE_CHAIN (prev
) = copy_node (next
);
1109 prev
= TREE_CHAIN (prev
);
1110 next
= TREE_CHAIN (next
);
1116 /* Return the value that TREE_INT_CST_EXT_NUNITS should have for an
1117 INTEGER_CST with value CST and type TYPE. */
1120 get_int_cst_ext_nunits (tree type
, const wide_int
&cst
)
1122 gcc_checking_assert (cst
.get_precision () == TYPE_PRECISION (type
));
1123 /* We need an extra zero HWI if CST is an unsigned integer with its
1124 upper bit set, and if CST occupies a whole number of HWIs. */
1125 if (TYPE_UNSIGNED (type
)
1127 && (cst
.get_precision () % HOST_BITS_PER_WIDE_INT
) == 0)
1128 return cst
.get_precision () / HOST_BITS_PER_WIDE_INT
+ 1;
1129 return cst
.get_len ();
1132 /* Return a new INTEGER_CST with value CST and type TYPE. */
1135 build_new_int_cst (tree type
, const wide_int
&cst
)
1137 unsigned int len
= cst
.get_len ();
1138 unsigned int ext_len
= get_int_cst_ext_nunits (type
, cst
);
1139 tree nt
= make_int_cst (len
, ext_len
);
1144 TREE_INT_CST_ELT (nt
, ext_len
) = 0;
1145 for (unsigned int i
= len
; i
< ext_len
; ++i
)
1146 TREE_INT_CST_ELT (nt
, i
) = -1;
1148 else if (TYPE_UNSIGNED (type
)
1149 && cst
.get_precision () < len
* HOST_BITS_PER_WIDE_INT
)
1152 TREE_INT_CST_ELT (nt
, len
)
1153 = zext_hwi (cst
.elt (len
),
1154 cst
.get_precision () % HOST_BITS_PER_WIDE_INT
);
1157 for (unsigned int i
= 0; i
< len
; i
++)
1158 TREE_INT_CST_ELT (nt
, i
) = cst
.elt (i
);
1159 TREE_TYPE (nt
) = type
;
1163 /* Create an INT_CST node with a LOW value sign extended to TYPE. */
1166 build_int_cst (tree type
, HOST_WIDE_INT low
)
1168 /* Support legacy code. */
1170 type
= integer_type_node
;
1172 return wide_int_to_tree (type
, wi::shwi (low
, TYPE_PRECISION (type
)));
1176 build_int_cstu (tree type
, unsigned HOST_WIDE_INT cst
)
1178 return wide_int_to_tree (type
, wi::uhwi (cst
, TYPE_PRECISION (type
)));
1181 /* Create an INT_CST node with a LOW value sign extended to TYPE. */
1184 build_int_cst_type (tree type
, HOST_WIDE_INT low
)
1187 return wide_int_to_tree (type
, wi::shwi (low
, TYPE_PRECISION (type
)));
1190 /* Constructs tree in type TYPE from with value given by CST. Signedness
1191 of CST is assumed to be the same as the signedness of TYPE. */
1194 double_int_to_tree (tree type
, double_int cst
)
1196 return wide_int_to_tree (type
, widest_int::from (cst
, TYPE_SIGN (type
)));
1199 /* We force the wide_int CST to the range of the type TYPE by sign or
1200 zero extending it. OVERFLOWABLE indicates if we are interested in
1201 overflow of the value, when >0 we are only interested in signed
1202 overflow, for <0 we are interested in any overflow. OVERFLOWED
1203 indicates whether overflow has already occurred. CONST_OVERFLOWED
1204 indicates whether constant overflow has already occurred. We force
1205 T's value to be within range of T's type (by setting to 0 or 1 all
1206 the bits outside the type's range). We set TREE_OVERFLOWED if,
1207 OVERFLOWED is nonzero,
1208 or OVERFLOWABLE is >0 and signed overflow occurs
1209 or OVERFLOWABLE is <0 and any overflow occurs
1210 We return a new tree node for the extended wide_int. The node
1211 is shared if no overflow flags are set. */
1215 force_fit_type (tree type
, const wide_int_ref
&cst
,
1216 int overflowable
, bool overflowed
)
1218 signop sign
= TYPE_SIGN (type
);
1220 /* If we need to set overflow flags, return a new unshared node. */
1221 if (overflowed
|| !wi::fits_to_tree_p (cst
, type
))
1225 || (overflowable
> 0 && sign
== SIGNED
))
1227 wide_int tmp
= wide_int::from (cst
, TYPE_PRECISION (type
), sign
);
1228 tree t
= build_new_int_cst (type
, tmp
);
1229 TREE_OVERFLOW (t
) = 1;
1234 /* Else build a shared node. */
1235 return wide_int_to_tree (type
, cst
);
1238 /* These are the hash table functions for the hash table of INTEGER_CST
1239 nodes of a sizetype. */
1241 /* Return the hash code code X, an INTEGER_CST. */
1244 int_cst_hash_hash (const void *x
)
1246 const_tree
const t
= (const_tree
) x
;
1247 hashval_t code
= htab_hash_pointer (TREE_TYPE (t
));
1250 for (i
= 0; i
< TREE_INT_CST_NUNITS (t
); i
++)
1251 code
^= TREE_INT_CST_ELT (t
, i
);
1256 /* Return nonzero if the value represented by *X (an INTEGER_CST tree node)
1257 is the same as that given by *Y, which is the same. */
1260 int_cst_hash_eq (const void *x
, const void *y
)
1262 const_tree
const xt
= (const_tree
) x
;
1263 const_tree
const yt
= (const_tree
) y
;
1265 if (TREE_TYPE (xt
) != TREE_TYPE (yt
)
1266 || TREE_INT_CST_NUNITS (xt
) != TREE_INT_CST_NUNITS (yt
)
1267 || TREE_INT_CST_EXT_NUNITS (xt
) != TREE_INT_CST_EXT_NUNITS (yt
))
1270 for (int i
= 0; i
< TREE_INT_CST_NUNITS (xt
); i
++)
1271 if (TREE_INT_CST_ELT (xt
, i
) != TREE_INT_CST_ELT (yt
, i
))
1277 /* Create an INT_CST node of TYPE and value CST.
1278 The returned node is always shared. For small integers we use a
1279 per-type vector cache, for larger ones we use a single hash table.
1280 The value is extended from its precision according to the sign of
1281 the type to be a multiple of HOST_BITS_PER_WIDE_INT. This defines
1282 the upper bits and ensures that hashing and value equality based
1283 upon the underlying HOST_WIDE_INTs works without masking. */
1286 wide_int_to_tree (tree type
, const wide_int_ref
&pcst
)
1293 unsigned int prec
= TYPE_PRECISION (type
);
1294 signop sgn
= TYPE_SIGN (type
);
1296 /* Verify that everything is canonical. */
1297 int l
= pcst
.get_len ();
1300 if (pcst
.elt (l
- 1) == 0)
1301 gcc_checking_assert (pcst
.elt (l
- 2) < 0);
1302 if (pcst
.elt (l
- 1) == (HOST_WIDE_INT
) -1)
1303 gcc_checking_assert (pcst
.elt (l
- 2) >= 0);
1306 wide_int cst
= wide_int::from (pcst
, prec
, sgn
);
1307 unsigned int ext_len
= get_int_cst_ext_nunits (type
, cst
);
1311 /* We just need to store a single HOST_WIDE_INT. */
1313 if (TYPE_UNSIGNED (type
))
1314 hwi
= cst
.to_uhwi ();
1316 hwi
= cst
.to_shwi ();
1318 switch (TREE_CODE (type
))
1321 gcc_assert (hwi
== 0);
1325 case REFERENCE_TYPE
:
1326 /* Cache NULL pointer. */
1335 /* Cache false or true. */
1343 if (TYPE_SIGN (type
) == UNSIGNED
)
1346 limit
= INTEGER_SHARE_LIMIT
;
1347 if (IN_RANGE (hwi
, 0, INTEGER_SHARE_LIMIT
- 1))
1352 /* Cache [-1, N). */
1353 limit
= INTEGER_SHARE_LIMIT
+ 1;
1354 if (IN_RANGE (hwi
, -1, INTEGER_SHARE_LIMIT
- 1))
1368 /* Look for it in the type's vector of small shared ints. */
1369 if (!TYPE_CACHED_VALUES_P (type
))
1371 TYPE_CACHED_VALUES_P (type
) = 1;
1372 TYPE_CACHED_VALUES (type
) = make_tree_vec (limit
);
1375 t
= TREE_VEC_ELT (TYPE_CACHED_VALUES (type
), ix
);
1377 /* Make sure no one is clobbering the shared constant. */
1378 gcc_checking_assert (TREE_TYPE (t
) == type
1379 && TREE_INT_CST_NUNITS (t
) == 1
1380 && TREE_INT_CST_OFFSET_NUNITS (t
) == 1
1381 && TREE_INT_CST_EXT_NUNITS (t
) == 1
1382 && TREE_INT_CST_ELT (t
, 0) == hwi
);
1385 /* Create a new shared int. */
1386 t
= build_new_int_cst (type
, cst
);
1387 TREE_VEC_ELT (TYPE_CACHED_VALUES (type
), ix
) = t
;
1392 /* Use the cache of larger shared ints, using int_cst_node as
1396 TREE_INT_CST_ELT (int_cst_node
, 0) = hwi
;
1397 TREE_TYPE (int_cst_node
) = type
;
1399 slot
= htab_find_slot (int_cst_hash_table
, int_cst_node
, INSERT
);
1403 /* Insert this one into the hash table. */
1406 /* Make a new node for next time round. */
1407 int_cst_node
= make_int_cst (1, 1);
1413 /* The value either hashes properly or we drop it on the floor
1414 for the gc to take care of. There will not be enough of them
1418 tree nt
= build_new_int_cst (type
, cst
);
1419 slot
= htab_find_slot (int_cst_hash_table
, nt
, INSERT
);
1423 /* Insert this one into the hash table. */
1433 cache_integer_cst (tree t
)
1435 tree type
= TREE_TYPE (t
);
1438 int prec
= TYPE_PRECISION (type
);
1440 gcc_assert (!TREE_OVERFLOW (t
));
1442 switch (TREE_CODE (type
))
1445 gcc_assert (integer_zerop (t
));
1449 case REFERENCE_TYPE
:
1450 /* Cache NULL pointer. */
1451 if (integer_zerop (t
))
1459 /* Cache false or true. */
1461 if (wi::ltu_p (t
, 2))
1462 ix
= TREE_INT_CST_ELT (t
, 0);
1467 if (TYPE_UNSIGNED (type
))
1470 limit
= INTEGER_SHARE_LIMIT
;
1472 /* This is a little hokie, but if the prec is smaller than
1473 what is necessary to hold INTEGER_SHARE_LIMIT, then the
1474 obvious test will not get the correct answer. */
1475 if (prec
< HOST_BITS_PER_WIDE_INT
)
1477 if (tree_to_uhwi (t
) < (unsigned HOST_WIDE_INT
) INTEGER_SHARE_LIMIT
)
1478 ix
= tree_to_uhwi (t
);
1480 else if (wi::ltu_p (t
, INTEGER_SHARE_LIMIT
))
1481 ix
= tree_to_uhwi (t
);
1486 limit
= INTEGER_SHARE_LIMIT
+ 1;
1488 if (integer_minus_onep (t
))
1490 else if (!wi::neg_p (t
))
1492 if (prec
< HOST_BITS_PER_WIDE_INT
)
1494 if (tree_to_shwi (t
) < INTEGER_SHARE_LIMIT
)
1495 ix
= tree_to_shwi (t
) + 1;
1497 else if (wi::ltu_p (t
, INTEGER_SHARE_LIMIT
))
1498 ix
= tree_to_shwi (t
) + 1;
1512 /* Look for it in the type's vector of small shared ints. */
1513 if (!TYPE_CACHED_VALUES_P (type
))
1515 TYPE_CACHED_VALUES_P (type
) = 1;
1516 TYPE_CACHED_VALUES (type
) = make_tree_vec (limit
);
1519 gcc_assert (TREE_VEC_ELT (TYPE_CACHED_VALUES (type
), ix
) == NULL_TREE
);
1520 TREE_VEC_ELT (TYPE_CACHED_VALUES (type
), ix
) = t
;
1524 /* Use the cache of larger shared ints. */
1527 slot
= htab_find_slot (int_cst_hash_table
, t
, INSERT
);
1528 /* If there is already an entry for the number verify it's the
1531 gcc_assert (wi::eq_p (tree (*slot
), t
));
1533 /* Otherwise insert this one into the hash table. */
1539 /* Builds an integer constant in TYPE such that lowest BITS bits are ones
1540 and the rest are zeros. */
1543 build_low_bits_mask (tree type
, unsigned bits
)
1545 gcc_assert (bits
<= TYPE_PRECISION (type
));
1547 return wide_int_to_tree (type
, wi::mask (bits
, false,
1548 TYPE_PRECISION (type
)));
1551 /* Checks that X is integer constant that can be expressed in (unsigned)
1552 HOST_WIDE_INT without loss of precision. */
1555 cst_and_fits_in_hwi (const_tree x
)
1557 if (TREE_CODE (x
) != INTEGER_CST
)
1560 if (TYPE_PRECISION (TREE_TYPE (x
)) > HOST_BITS_PER_WIDE_INT
)
1563 return TREE_INT_CST_NUNITS (x
) == 1;
1566 /* Build a newly constructed TREE_VEC node of length LEN. */
1569 make_vector_stat (unsigned len MEM_STAT_DECL
)
1572 unsigned length
= (len
- 1) * sizeof (tree
) + sizeof (struct tree_vector
);
1574 record_node_allocation_statistics (VECTOR_CST
, length
);
1576 t
= ggc_alloc_cleared_tree_node_stat (length PASS_MEM_STAT
);
1578 TREE_SET_CODE (t
, VECTOR_CST
);
1579 TREE_CONSTANT (t
) = 1;
1584 /* Return a new VECTOR_CST node whose type is TYPE and whose values
1585 are in a list pointed to by VALS. */
1588 build_vector_stat (tree type
, tree
*vals MEM_STAT_DECL
)
1592 tree v
= make_vector (TYPE_VECTOR_SUBPARTS (type
));
1593 TREE_TYPE (v
) = type
;
1595 /* Iterate through elements and check for overflow. */
1596 for (cnt
= 0; cnt
< TYPE_VECTOR_SUBPARTS (type
); ++cnt
)
1598 tree value
= vals
[cnt
];
1600 VECTOR_CST_ELT (v
, cnt
) = value
;
1602 /* Don't crash if we get an address constant. */
1603 if (!CONSTANT_CLASS_P (value
))
1606 over
|= TREE_OVERFLOW (value
);
1609 TREE_OVERFLOW (v
) = over
;
1613 /* Return a new VECTOR_CST node whose type is TYPE and whose values
1614 are extracted from V, a vector of CONSTRUCTOR_ELT. */
1617 build_vector_from_ctor (tree type
, vec
<constructor_elt
, va_gc
> *v
)
1619 tree
*vec
= XALLOCAVEC (tree
, TYPE_VECTOR_SUBPARTS (type
));
1620 unsigned HOST_WIDE_INT idx
;
1623 FOR_EACH_CONSTRUCTOR_VALUE (v
, idx
, value
)
1625 for (; idx
< TYPE_VECTOR_SUBPARTS (type
); ++idx
)
1626 vec
[idx
] = build_zero_cst (TREE_TYPE (type
));
1628 return build_vector (type
, vec
);
1631 /* Build a vector of type VECTYPE where all the elements are SCs. */
1633 build_vector_from_val (tree vectype
, tree sc
)
1635 int i
, nunits
= TYPE_VECTOR_SUBPARTS (vectype
);
1637 if (sc
== error_mark_node
)
1640 /* Verify that the vector type is suitable for SC. Note that there
1641 is some inconsistency in the type-system with respect to restrict
1642 qualifications of pointers. Vector types always have a main-variant
1643 element type and the qualification is applied to the vector-type.
1644 So TREE_TYPE (vector-type) does not return a properly qualified
1645 vector element-type. */
1646 gcc_checking_assert (types_compatible_p (TYPE_MAIN_VARIANT (TREE_TYPE (sc
)),
1647 TREE_TYPE (vectype
)));
1649 if (CONSTANT_CLASS_P (sc
))
1651 tree
*v
= XALLOCAVEC (tree
, nunits
);
1652 for (i
= 0; i
< nunits
; ++i
)
1654 return build_vector (vectype
, v
);
1658 vec
<constructor_elt
, va_gc
> *v
;
1659 vec_alloc (v
, nunits
);
1660 for (i
= 0; i
< nunits
; ++i
)
1661 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, sc
);
1662 return build_constructor (vectype
, v
);
1666 /* Return a new CONSTRUCTOR node whose type is TYPE and whose values
1667 are in the vec pointed to by VALS. */
1669 build_constructor (tree type
, vec
<constructor_elt
, va_gc
> *vals
)
1671 tree c
= make_node (CONSTRUCTOR
);
1673 constructor_elt
*elt
;
1674 bool constant_p
= true;
1675 bool side_effects_p
= false;
1677 TREE_TYPE (c
) = type
;
1678 CONSTRUCTOR_ELTS (c
) = vals
;
1680 FOR_EACH_VEC_SAFE_ELT (vals
, i
, elt
)
1682 /* Mostly ctors will have elts that don't have side-effects, so
1683 the usual case is to scan all the elements. Hence a single
1684 loop for both const and side effects, rather than one loop
1685 each (with early outs). */
1686 if (!TREE_CONSTANT (elt
->value
))
1688 if (TREE_SIDE_EFFECTS (elt
->value
))
1689 side_effects_p
= true;
1692 TREE_SIDE_EFFECTS (c
) = side_effects_p
;
1693 TREE_CONSTANT (c
) = constant_p
;
1698 /* Build a CONSTRUCTOR node made of a single initializer, with the specified
1701 build_constructor_single (tree type
, tree index
, tree value
)
1703 vec
<constructor_elt
, va_gc
> *v
;
1704 constructor_elt elt
= {index
, value
};
1707 v
->quick_push (elt
);
1709 return build_constructor (type
, v
);
1713 /* Return a new CONSTRUCTOR node whose type is TYPE and whose values
1714 are in a list pointed to by VALS. */
1716 build_constructor_from_list (tree type
, tree vals
)
1719 vec
<constructor_elt
, va_gc
> *v
= NULL
;
1723 vec_alloc (v
, list_length (vals
));
1724 for (t
= vals
; t
; t
= TREE_CHAIN (t
))
1725 CONSTRUCTOR_APPEND_ELT (v
, TREE_PURPOSE (t
), TREE_VALUE (t
));
1728 return build_constructor (type
, v
);
1731 /* Return a new CONSTRUCTOR node whose type is TYPE. NELTS is the number
1732 of elements, provided as index/value pairs. */
1735 build_constructor_va (tree type
, int nelts
, ...)
1737 vec
<constructor_elt
, va_gc
> *v
= NULL
;
1740 va_start (p
, nelts
);
1741 vec_alloc (v
, nelts
);
1744 tree index
= va_arg (p
, tree
);
1745 tree value
= va_arg (p
, tree
);
1746 CONSTRUCTOR_APPEND_ELT (v
, index
, value
);
1749 return build_constructor (type
, v
);
1752 /* Return a new FIXED_CST node whose type is TYPE and value is F. */
1755 build_fixed (tree type
, FIXED_VALUE_TYPE f
)
1758 FIXED_VALUE_TYPE
*fp
;
1760 v
= make_node (FIXED_CST
);
1761 fp
= ggc_alloc
<fixed_value
> ();
1762 memcpy (fp
, &f
, sizeof (FIXED_VALUE_TYPE
));
1764 TREE_TYPE (v
) = type
;
1765 TREE_FIXED_CST_PTR (v
) = fp
;
1769 /* Return a new REAL_CST node whose type is TYPE and value is D. */
1772 build_real (tree type
, REAL_VALUE_TYPE d
)
1775 REAL_VALUE_TYPE
*dp
;
1778 /* ??? Used to check for overflow here via CHECK_FLOAT_TYPE.
1779 Consider doing it via real_convert now. */
1781 v
= make_node (REAL_CST
);
1782 dp
= ggc_alloc
<real_value
> ();
1783 memcpy (dp
, &d
, sizeof (REAL_VALUE_TYPE
));
1785 TREE_TYPE (v
) = type
;
1786 TREE_REAL_CST_PTR (v
) = dp
;
1787 TREE_OVERFLOW (v
) = overflow
;
1791 /* Return a new REAL_CST node whose type is TYPE
1792 and whose value is the integer value of the INTEGER_CST node I. */
1795 real_value_from_int_cst (const_tree type
, const_tree i
)
1799 /* Clear all bits of the real value type so that we can later do
1800 bitwise comparisons to see if two values are the same. */
1801 memset (&d
, 0, sizeof d
);
1803 real_from_integer (&d
, type
? TYPE_MODE (type
) : VOIDmode
, i
,
1804 TYPE_SIGN (TREE_TYPE (i
)));
1808 /* Given a tree representing an integer constant I, return a tree
1809 representing the same value as a floating-point constant of type TYPE. */
1812 build_real_from_int_cst (tree type
, const_tree i
)
1815 int overflow
= TREE_OVERFLOW (i
);
1817 v
= build_real (type
, real_value_from_int_cst (type
, i
));
1819 TREE_OVERFLOW (v
) |= overflow
;
1823 /* Return a newly constructed STRING_CST node whose value is
1824 the LEN characters at STR.
1825 Note that for a C string literal, LEN should include the trailing NUL.
1826 The TREE_TYPE is not initialized. */
1829 build_string (int len
, const char *str
)
1834 /* Do not waste bytes provided by padding of struct tree_string. */
1835 length
= len
+ offsetof (struct tree_string
, str
) + 1;
1837 record_node_allocation_statistics (STRING_CST
, length
);
1839 s
= (tree
) ggc_internal_alloc (length
);
1841 memset (s
, 0, sizeof (struct tree_typed
));
1842 TREE_SET_CODE (s
, STRING_CST
);
1843 TREE_CONSTANT (s
) = 1;
1844 TREE_STRING_LENGTH (s
) = len
;
1845 memcpy (s
->string
.str
, str
, len
);
1846 s
->string
.str
[len
] = '\0';
1851 /* Return a newly constructed COMPLEX_CST node whose value is
1852 specified by the real and imaginary parts REAL and IMAG.
1853 Both REAL and IMAG should be constant nodes. TYPE, if specified,
1854 will be the type of the COMPLEX_CST; otherwise a new type will be made. */
1857 build_complex (tree type
, tree real
, tree imag
)
1859 tree t
= make_node (COMPLEX_CST
);
1861 TREE_REALPART (t
) = real
;
1862 TREE_IMAGPART (t
) = imag
;
1863 TREE_TYPE (t
) = type
? type
: build_complex_type (TREE_TYPE (real
));
1864 TREE_OVERFLOW (t
) = TREE_OVERFLOW (real
) | TREE_OVERFLOW (imag
);
1868 /* Return a constant of arithmetic type TYPE which is the
1869 multiplicative identity of the set TYPE. */
1872 build_one_cst (tree type
)
1874 switch (TREE_CODE (type
))
1876 case INTEGER_TYPE
: case ENUMERAL_TYPE
: case BOOLEAN_TYPE
:
1877 case POINTER_TYPE
: case REFERENCE_TYPE
:
1879 return build_int_cst (type
, 1);
1882 return build_real (type
, dconst1
);
1884 case FIXED_POINT_TYPE
:
1885 /* We can only generate 1 for accum types. */
1886 gcc_assert (ALL_SCALAR_ACCUM_MODE_P (TYPE_MODE (type
)));
1887 return build_fixed (type
, FCONST1 (TYPE_MODE (type
)));
1891 tree scalar
= build_one_cst (TREE_TYPE (type
));
1893 return build_vector_from_val (type
, scalar
);
1897 return build_complex (type
,
1898 build_one_cst (TREE_TYPE (type
)),
1899 build_zero_cst (TREE_TYPE (type
)));
1906 /* Return an integer of type TYPE containing all 1's in as much precision as
1907 it contains, or a complex or vector whose subparts are such integers. */
1910 build_all_ones_cst (tree type
)
1912 if (TREE_CODE (type
) == COMPLEX_TYPE
)
1914 tree scalar
= build_all_ones_cst (TREE_TYPE (type
));
1915 return build_complex (type
, scalar
, scalar
);
1918 return build_minus_one_cst (type
);
1921 /* Return a constant of arithmetic type TYPE which is the
1922 opposite of the multiplicative identity of the set TYPE. */
1925 build_minus_one_cst (tree type
)
1927 switch (TREE_CODE (type
))
1929 case INTEGER_TYPE
: case ENUMERAL_TYPE
: case BOOLEAN_TYPE
:
1930 case POINTER_TYPE
: case REFERENCE_TYPE
:
1932 return build_int_cst (type
, -1);
1935 return build_real (type
, dconstm1
);
1937 case FIXED_POINT_TYPE
:
1938 /* We can only generate 1 for accum types. */
1939 gcc_assert (ALL_SCALAR_ACCUM_MODE_P (TYPE_MODE (type
)));
1940 return build_fixed (type
, fixed_from_double_int (double_int_minus_one
,
1945 tree scalar
= build_minus_one_cst (TREE_TYPE (type
));
1947 return build_vector_from_val (type
, scalar
);
1951 return build_complex (type
,
1952 build_minus_one_cst (TREE_TYPE (type
)),
1953 build_zero_cst (TREE_TYPE (type
)));
1960 /* Build 0 constant of type TYPE. This is used by constructor folding
1961 and thus the constant should be represented in memory by
1965 build_zero_cst (tree type
)
1967 switch (TREE_CODE (type
))
1969 case INTEGER_TYPE
: case ENUMERAL_TYPE
: case BOOLEAN_TYPE
:
1970 case POINTER_TYPE
: case REFERENCE_TYPE
:
1971 case OFFSET_TYPE
: case NULLPTR_TYPE
:
1972 return build_int_cst (type
, 0);
1975 return build_real (type
, dconst0
);
1977 case FIXED_POINT_TYPE
:
1978 return build_fixed (type
, FCONST0 (TYPE_MODE (type
)));
1982 tree scalar
= build_zero_cst (TREE_TYPE (type
));
1984 return build_vector_from_val (type
, scalar
);
1989 tree zero
= build_zero_cst (TREE_TYPE (type
));
1991 return build_complex (type
, zero
, zero
);
1995 if (!AGGREGATE_TYPE_P (type
))
1996 return fold_convert (type
, integer_zero_node
);
1997 return build_constructor (type
, NULL
);
2002 /* Build a BINFO with LEN language slots. */
2005 make_tree_binfo_stat (unsigned base_binfos MEM_STAT_DECL
)
2008 size_t length
= (offsetof (struct tree_binfo
, base_binfos
)
2009 + vec
<tree
, va_gc
>::embedded_size (base_binfos
));
2011 record_node_allocation_statistics (TREE_BINFO
, length
);
2013 t
= ggc_alloc_tree_node_stat (length PASS_MEM_STAT
);
2015 memset (t
, 0, offsetof (struct tree_binfo
, base_binfos
));
2017 TREE_SET_CODE (t
, TREE_BINFO
);
2019 BINFO_BASE_BINFOS (t
)->embedded_init (base_binfos
);
2024 /* Create a CASE_LABEL_EXPR tree node and return it. */
2027 build_case_label (tree low_value
, tree high_value
, tree label_decl
)
2029 tree t
= make_node (CASE_LABEL_EXPR
);
2031 TREE_TYPE (t
) = void_type_node
;
2032 SET_EXPR_LOCATION (t
, DECL_SOURCE_LOCATION (label_decl
));
2034 CASE_LOW (t
) = low_value
;
2035 CASE_HIGH (t
) = high_value
;
2036 CASE_LABEL (t
) = label_decl
;
2037 CASE_CHAIN (t
) = NULL_TREE
;
2042 /* Build a newly constructed INTEGER_CST node. LEN and EXT_LEN are the
2043 values of TREE_INT_CST_NUNITS and TREE_INT_CST_EXT_NUNITS respectively.
2044 The latter determines the length of the HOST_WIDE_INT vector. */
2047 make_int_cst_stat (int len
, int ext_len MEM_STAT_DECL
)
2050 int length
= ((ext_len
- 1) * sizeof (HOST_WIDE_INT
)
2051 + sizeof (struct tree_int_cst
));
2054 record_node_allocation_statistics (INTEGER_CST
, length
);
2056 t
= ggc_alloc_cleared_tree_node_stat (length PASS_MEM_STAT
);
2058 TREE_SET_CODE (t
, INTEGER_CST
);
2059 TREE_INT_CST_NUNITS (t
) = len
;
2060 TREE_INT_CST_EXT_NUNITS (t
) = ext_len
;
2061 /* to_offset can only be applied to trees that are offset_int-sized
2062 or smaller. EXT_LEN is correct if it fits, otherwise the constant
2063 must be exactly the precision of offset_int and so LEN is correct. */
2064 if (ext_len
<= OFFSET_INT_ELTS
)
2065 TREE_INT_CST_OFFSET_NUNITS (t
) = ext_len
;
2067 TREE_INT_CST_OFFSET_NUNITS (t
) = len
;
2069 TREE_CONSTANT (t
) = 1;
2074 /* Build a newly constructed TREE_VEC node of length LEN. */
2077 make_tree_vec_stat (int len MEM_STAT_DECL
)
2080 int length
= (len
- 1) * sizeof (tree
) + sizeof (struct tree_vec
);
2082 record_node_allocation_statistics (TREE_VEC
, length
);
2084 t
= ggc_alloc_cleared_tree_node_stat (length PASS_MEM_STAT
);
2086 TREE_SET_CODE (t
, TREE_VEC
);
2087 TREE_VEC_LENGTH (t
) = len
;
2092 /* Grow a TREE_VEC node to new length LEN. */
2095 grow_tree_vec_stat (tree v
, int len MEM_STAT_DECL
)
2097 gcc_assert (TREE_CODE (v
) == TREE_VEC
);
2099 int oldlen
= TREE_VEC_LENGTH (v
);
2100 gcc_assert (len
> oldlen
);
2102 int oldlength
= (oldlen
- 1) * sizeof (tree
) + sizeof (struct tree_vec
);
2103 int length
= (len
- 1) * sizeof (tree
) + sizeof (struct tree_vec
);
2105 record_node_allocation_statistics (TREE_VEC
, length
- oldlength
);
2107 v
= (tree
) ggc_realloc (v
, length PASS_MEM_STAT
);
2109 TREE_VEC_LENGTH (v
) = len
;
2114 /* Return 1 if EXPR is the integer constant zero or a complex constant
2118 integer_zerop (const_tree expr
)
2122 switch (TREE_CODE (expr
))
2125 return wi::eq_p (expr
, 0);
2127 return (integer_zerop (TREE_REALPART (expr
))
2128 && integer_zerop (TREE_IMAGPART (expr
)));
2132 for (i
= 0; i
< VECTOR_CST_NELTS (expr
); ++i
)
2133 if (!integer_zerop (VECTOR_CST_ELT (expr
, i
)))
2142 /* Return 1 if EXPR is the integer constant one or the corresponding
2143 complex constant. */
2146 integer_onep (const_tree expr
)
2150 switch (TREE_CODE (expr
))
2153 return wi::eq_p (wi::to_widest (expr
), 1);
2155 return (integer_onep (TREE_REALPART (expr
))
2156 && integer_zerop (TREE_IMAGPART (expr
)));
2160 for (i
= 0; i
< VECTOR_CST_NELTS (expr
); ++i
)
2161 if (!integer_onep (VECTOR_CST_ELT (expr
, i
)))
2170 /* Return 1 if EXPR is an integer containing all 1's in as much precision as
2171 it contains, or a complex or vector whose subparts are such integers. */
2174 integer_all_onesp (const_tree expr
)
2178 if (TREE_CODE (expr
) == COMPLEX_CST
2179 && integer_all_onesp (TREE_REALPART (expr
))
2180 && integer_all_onesp (TREE_IMAGPART (expr
)))
2183 else if (TREE_CODE (expr
) == VECTOR_CST
)
2186 for (i
= 0; i
< VECTOR_CST_NELTS (expr
); ++i
)
2187 if (!integer_all_onesp (VECTOR_CST_ELT (expr
, i
)))
2192 else if (TREE_CODE (expr
) != INTEGER_CST
)
2195 return wi::max_value (TYPE_PRECISION (TREE_TYPE (expr
)), UNSIGNED
) == expr
;
2198 /* Return 1 if EXPR is the integer constant minus one. */
2201 integer_minus_onep (const_tree expr
)
2205 if (TREE_CODE (expr
) == COMPLEX_CST
)
2206 return (integer_all_onesp (TREE_REALPART (expr
))
2207 && integer_zerop (TREE_IMAGPART (expr
)));
2209 return integer_all_onesp (expr
);
2212 /* Return 1 if EXPR is an integer constant that is a power of 2 (i.e., has only
2216 integer_pow2p (const_tree expr
)
2220 if (TREE_CODE (expr
) == COMPLEX_CST
2221 && integer_pow2p (TREE_REALPART (expr
))
2222 && integer_zerop (TREE_IMAGPART (expr
)))
2225 if (TREE_CODE (expr
) != INTEGER_CST
)
2228 return wi::popcount (expr
) == 1;
2231 /* Return 1 if EXPR is an integer constant other than zero or a
2232 complex constant other than zero. */
2235 integer_nonzerop (const_tree expr
)
2239 return ((TREE_CODE (expr
) == INTEGER_CST
2240 && !wi::eq_p (expr
, 0))
2241 || (TREE_CODE (expr
) == COMPLEX_CST
2242 && (integer_nonzerop (TREE_REALPART (expr
))
2243 || integer_nonzerop (TREE_IMAGPART (expr
)))));
2246 /* Return 1 if EXPR is the fixed-point constant zero. */
2249 fixed_zerop (const_tree expr
)
2251 return (TREE_CODE (expr
) == FIXED_CST
2252 && TREE_FIXED_CST (expr
).data
.is_zero ());
2255 /* Return the power of two represented by a tree node known to be a
2259 tree_log2 (const_tree expr
)
2263 if (TREE_CODE (expr
) == COMPLEX_CST
)
2264 return tree_log2 (TREE_REALPART (expr
));
2266 return wi::exact_log2 (expr
);
2269 /* Similar, but return the largest integer Y such that 2 ** Y is less
2270 than or equal to EXPR. */
2273 tree_floor_log2 (const_tree expr
)
2277 if (TREE_CODE (expr
) == COMPLEX_CST
)
2278 return tree_log2 (TREE_REALPART (expr
));
2280 return wi::floor_log2 (expr
);
2283 /* Return number of known trailing zero bits in EXPR, or, if the value of
2284 EXPR is known to be zero, the precision of it's type. */
2287 tree_ctz (const_tree expr
)
2289 if (!INTEGRAL_TYPE_P (TREE_TYPE (expr
))
2290 && !POINTER_TYPE_P (TREE_TYPE (expr
)))
2293 unsigned int ret1
, ret2
, prec
= TYPE_PRECISION (TREE_TYPE (expr
));
2294 switch (TREE_CODE (expr
))
2297 ret1
= wi::ctz (expr
);
2298 return MIN (ret1
, prec
);
2300 ret1
= wi::ctz (get_nonzero_bits (expr
));
2301 return MIN (ret1
, prec
);
2308 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2311 ret2
= tree_ctz (TREE_OPERAND (expr
, 1));
2312 return MIN (ret1
, ret2
);
2313 case POINTER_PLUS_EXPR
:
2314 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2315 ret2
= tree_ctz (TREE_OPERAND (expr
, 1));
2316 /* Second operand is sizetype, which could be in theory
2317 wider than pointer's precision. Make sure we never
2318 return more than prec. */
2319 ret2
= MIN (ret2
, prec
);
2320 return MIN (ret1
, ret2
);
2322 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2323 ret2
= tree_ctz (TREE_OPERAND (expr
, 1));
2324 return MAX (ret1
, ret2
);
2326 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2327 ret2
= tree_ctz (TREE_OPERAND (expr
, 1));
2328 return MIN (ret1
+ ret2
, prec
);
2330 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2331 if (tree_fits_uhwi_p (TREE_OPERAND (expr
, 1))
2332 && (tree_to_uhwi (TREE_OPERAND (expr
, 1)) < prec
))
2334 ret2
= tree_to_uhwi (TREE_OPERAND (expr
, 1));
2335 return MIN (ret1
+ ret2
, prec
);
2339 if (tree_fits_uhwi_p (TREE_OPERAND (expr
, 1))
2340 && (tree_to_uhwi (TREE_OPERAND (expr
, 1)) < prec
))
2342 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2343 ret2
= tree_to_uhwi (TREE_OPERAND (expr
, 1));
2348 case TRUNC_DIV_EXPR
:
2350 case FLOOR_DIV_EXPR
:
2351 case ROUND_DIV_EXPR
:
2352 case EXACT_DIV_EXPR
:
2353 if (TREE_CODE (TREE_OPERAND (expr
, 1)) == INTEGER_CST
2354 && tree_int_cst_sgn (TREE_OPERAND (expr
, 1)) == 1)
2356 int l
= tree_log2 (TREE_OPERAND (expr
, 1));
2359 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2367 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2368 if (ret1
&& ret1
== TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (expr
, 0))))
2370 return MIN (ret1
, prec
);
2372 return tree_ctz (TREE_OPERAND (expr
, 0));
2374 ret1
= tree_ctz (TREE_OPERAND (expr
, 1));
2377 ret2
= tree_ctz (TREE_OPERAND (expr
, 2));
2378 return MIN (ret1
, ret2
);
2380 return tree_ctz (TREE_OPERAND (expr
, 1));
2382 ret1
= get_pointer_alignment (CONST_CAST_TREE (expr
));
2383 if (ret1
> BITS_PER_UNIT
)
2385 ret1
= ctz_hwi (ret1
/ BITS_PER_UNIT
);
2386 return MIN (ret1
, prec
);
2394 /* Return 1 if EXPR is the real constant zero. Trailing zeroes matter for
2395 decimal float constants, so don't return 1 for them. */
2398 real_zerop (const_tree expr
)
2402 switch (TREE_CODE (expr
))
2405 return REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconst0
)
2406 && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr
))));
2408 return real_zerop (TREE_REALPART (expr
))
2409 && real_zerop (TREE_IMAGPART (expr
));
2413 for (i
= 0; i
< VECTOR_CST_NELTS (expr
); ++i
)
2414 if (!real_zerop (VECTOR_CST_ELT (expr
, i
)))
2423 /* Return 1 if EXPR is the real constant one in real or complex form.
2424 Trailing zeroes matter for decimal float constants, so don't return
2428 real_onep (const_tree expr
)
2432 switch (TREE_CODE (expr
))
2435 return REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconst1
)
2436 && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr
))));
2438 return real_onep (TREE_REALPART (expr
))
2439 && real_zerop (TREE_IMAGPART (expr
));
2443 for (i
= 0; i
< VECTOR_CST_NELTS (expr
); ++i
)
2444 if (!real_onep (VECTOR_CST_ELT (expr
, i
)))
2453 /* Return 1 if EXPR is the real constant minus one. Trailing zeroes
2454 matter for decimal float constants, so don't return 1 for them. */
2457 real_minus_onep (const_tree expr
)
2461 switch (TREE_CODE (expr
))
2464 return REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconstm1
)
2465 && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr
))));
2467 return real_minus_onep (TREE_REALPART (expr
))
2468 && real_zerop (TREE_IMAGPART (expr
));
2472 for (i
= 0; i
< VECTOR_CST_NELTS (expr
); ++i
)
2473 if (!real_minus_onep (VECTOR_CST_ELT (expr
, i
)))
2482 /* Nonzero if EXP is a constant or a cast of a constant. */
2485 really_constant_p (const_tree exp
)
2487 /* This is not quite the same as STRIP_NOPS. It does more. */
2488 while (CONVERT_EXPR_P (exp
)
2489 || TREE_CODE (exp
) == NON_LVALUE_EXPR
)
2490 exp
= TREE_OPERAND (exp
, 0);
2491 return TREE_CONSTANT (exp
);
2494 /* Return first list element whose TREE_VALUE is ELEM.
2495 Return 0 if ELEM is not in LIST. */
2498 value_member (tree elem
, tree list
)
2502 if (elem
== TREE_VALUE (list
))
2504 list
= TREE_CHAIN (list
);
2509 /* Return first list element whose TREE_PURPOSE is ELEM.
2510 Return 0 if ELEM is not in LIST. */
2513 purpose_member (const_tree elem
, tree list
)
2517 if (elem
== TREE_PURPOSE (list
))
2519 list
= TREE_CHAIN (list
);
2524 /* Return true if ELEM is in V. */
2527 vec_member (const_tree elem
, vec
<tree
, va_gc
> *v
)
2531 FOR_EACH_VEC_SAFE_ELT (v
, ix
, t
)
2537 /* Returns element number IDX (zero-origin) of chain CHAIN, or
2541 chain_index (int idx
, tree chain
)
2543 for (; chain
&& idx
> 0; --idx
)
2544 chain
= TREE_CHAIN (chain
);
2548 /* Return nonzero if ELEM is part of the chain CHAIN. */
2551 chain_member (const_tree elem
, const_tree chain
)
2557 chain
= DECL_CHAIN (chain
);
2563 /* Return the length of a chain of nodes chained through TREE_CHAIN.
2564 We expect a null pointer to mark the end of the chain.
2565 This is the Lisp primitive `length'. */
2568 list_length (const_tree t
)
2571 #ifdef ENABLE_TREE_CHECKING
2579 #ifdef ENABLE_TREE_CHECKING
2582 gcc_assert (p
!= q
);
2590 /* Returns the first FIELD_DECL in the TYPE_FIELDS of the RECORD_TYPE or
2591 UNION_TYPE TYPE, or NULL_TREE if none. */
2594 first_field (const_tree type
)
2596 tree t
= TYPE_FIELDS (type
);
2597 while (t
&& TREE_CODE (t
) != FIELD_DECL
)
2602 /* Concatenate two chains of nodes (chained through TREE_CHAIN)
2603 by modifying the last node in chain 1 to point to chain 2.
2604 This is the Lisp primitive `nconc'. */
2607 chainon (tree op1
, tree op2
)
2616 for (t1
= op1
; TREE_CHAIN (t1
); t1
= TREE_CHAIN (t1
))
2618 TREE_CHAIN (t1
) = op2
;
2620 #ifdef ENABLE_TREE_CHECKING
2623 for (t2
= op2
; t2
; t2
= TREE_CHAIN (t2
))
2624 gcc_assert (t2
!= t1
);
2631 /* Return the last node in a chain of nodes (chained through TREE_CHAIN). */
2634 tree_last (tree chain
)
2638 while ((next
= TREE_CHAIN (chain
)))
2643 /* Reverse the order of elements in the chain T,
2644 and return the new head of the chain (old last element). */
2649 tree prev
= 0, decl
, next
;
2650 for (decl
= t
; decl
; decl
= next
)
2652 /* We shouldn't be using this function to reverse BLOCK chains; we
2653 have blocks_nreverse for that. */
2654 gcc_checking_assert (TREE_CODE (decl
) != BLOCK
);
2655 next
= TREE_CHAIN (decl
);
2656 TREE_CHAIN (decl
) = prev
;
2662 /* Return a newly created TREE_LIST node whose
2663 purpose and value fields are PARM and VALUE. */
2666 build_tree_list_stat (tree parm
, tree value MEM_STAT_DECL
)
2668 tree t
= make_node_stat (TREE_LIST PASS_MEM_STAT
);
2669 TREE_PURPOSE (t
) = parm
;
2670 TREE_VALUE (t
) = value
;
2674 /* Build a chain of TREE_LIST nodes from a vector. */
2677 build_tree_list_vec_stat (const vec
<tree
, va_gc
> *vec MEM_STAT_DECL
)
2679 tree ret
= NULL_TREE
;
2683 FOR_EACH_VEC_SAFE_ELT (vec
, i
, t
)
2685 *pp
= build_tree_list_stat (NULL
, t PASS_MEM_STAT
);
2686 pp
= &TREE_CHAIN (*pp
);
2691 /* Return a newly created TREE_LIST node whose
2692 purpose and value fields are PURPOSE and VALUE
2693 and whose TREE_CHAIN is CHAIN. */
2696 tree_cons_stat (tree purpose
, tree value
, tree chain MEM_STAT_DECL
)
2700 node
= ggc_alloc_tree_node_stat (sizeof (struct tree_list
) PASS_MEM_STAT
);
2701 memset (node
, 0, sizeof (struct tree_common
));
2703 record_node_allocation_statistics (TREE_LIST
, sizeof (struct tree_list
));
2705 TREE_SET_CODE (node
, TREE_LIST
);
2706 TREE_CHAIN (node
) = chain
;
2707 TREE_PURPOSE (node
) = purpose
;
2708 TREE_VALUE (node
) = value
;
2712 /* Return the values of the elements of a CONSTRUCTOR as a vector of
2716 ctor_to_vec (tree ctor
)
2718 vec
<tree
, va_gc
> *vec
;
2719 vec_alloc (vec
, CONSTRUCTOR_NELTS (ctor
));
2723 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (ctor
), ix
, val
)
2724 vec
->quick_push (val
);
2729 /* Return the size nominally occupied by an object of type TYPE
2730 when it resides in memory. The value is measured in units of bytes,
2731 and its data type is that normally used for type sizes
2732 (which is the first type created by make_signed_type or
2733 make_unsigned_type). */
2736 size_in_bytes (const_tree type
)
2740 if (type
== error_mark_node
)
2741 return integer_zero_node
;
2743 type
= TYPE_MAIN_VARIANT (type
);
2744 t
= TYPE_SIZE_UNIT (type
);
2748 lang_hooks
.types
.incomplete_type_error (NULL_TREE
, type
);
2749 return size_zero_node
;
2755 /* Return the size of TYPE (in bytes) as a wide integer
2756 or return -1 if the size can vary or is larger than an integer. */
2759 int_size_in_bytes (const_tree type
)
2763 if (type
== error_mark_node
)
2766 type
= TYPE_MAIN_VARIANT (type
);
2767 t
= TYPE_SIZE_UNIT (type
);
2769 if (t
&& tree_fits_uhwi_p (t
))
2770 return TREE_INT_CST_LOW (t
);
2775 /* Return the maximum size of TYPE (in bytes) as a wide integer
2776 or return -1 if the size can vary or is larger than an integer. */
2779 max_int_size_in_bytes (const_tree type
)
2781 HOST_WIDE_INT size
= -1;
2784 /* If this is an array type, check for a possible MAX_SIZE attached. */
2786 if (TREE_CODE (type
) == ARRAY_TYPE
)
2788 size_tree
= TYPE_ARRAY_MAX_SIZE (type
);
2790 if (size_tree
&& tree_fits_uhwi_p (size_tree
))
2791 size
= tree_to_uhwi (size_tree
);
2794 /* If we still haven't been able to get a size, see if the language
2795 can compute a maximum size. */
2799 size_tree
= lang_hooks
.types
.max_size (type
);
2801 if (size_tree
&& tree_fits_uhwi_p (size_tree
))
2802 size
= tree_to_uhwi (size_tree
);
2808 /* Return the bit position of FIELD, in bits from the start of the record.
2809 This is a tree of type bitsizetype. */
2812 bit_position (const_tree field
)
2814 return bit_from_pos (DECL_FIELD_OFFSET (field
),
2815 DECL_FIELD_BIT_OFFSET (field
));
2818 /* Likewise, but return as an integer. It must be representable in
2819 that way (since it could be a signed value, we don't have the
2820 option of returning -1 like int_size_in_byte can. */
2823 int_bit_position (const_tree field
)
2825 return tree_to_shwi (bit_position (field
));
2828 /* Return the byte position of FIELD, in bytes from the start of the record.
2829 This is a tree of type sizetype. */
2832 byte_position (const_tree field
)
2834 return byte_from_pos (DECL_FIELD_OFFSET (field
),
2835 DECL_FIELD_BIT_OFFSET (field
));
2838 /* Likewise, but return as an integer. It must be representable in
2839 that way (since it could be a signed value, we don't have the
2840 option of returning -1 like int_size_in_byte can. */
2843 int_byte_position (const_tree field
)
2845 return tree_to_shwi (byte_position (field
));
2848 /* Return the strictest alignment, in bits, that T is known to have. */
2851 expr_align (const_tree t
)
2853 unsigned int align0
, align1
;
2855 switch (TREE_CODE (t
))
2857 CASE_CONVERT
: case NON_LVALUE_EXPR
:
2858 /* If we have conversions, we know that the alignment of the
2859 object must meet each of the alignments of the types. */
2860 align0
= expr_align (TREE_OPERAND (t
, 0));
2861 align1
= TYPE_ALIGN (TREE_TYPE (t
));
2862 return MAX (align0
, align1
);
2864 case SAVE_EXPR
: case COMPOUND_EXPR
: case MODIFY_EXPR
:
2865 case INIT_EXPR
: case TARGET_EXPR
: case WITH_CLEANUP_EXPR
:
2866 case CLEANUP_POINT_EXPR
:
2867 /* These don't change the alignment of an object. */
2868 return expr_align (TREE_OPERAND (t
, 0));
2871 /* The best we can do is say that the alignment is the least aligned
2873 align0
= expr_align (TREE_OPERAND (t
, 1));
2874 align1
= expr_align (TREE_OPERAND (t
, 2));
2875 return MIN (align0
, align1
);
2877 /* FIXME: LABEL_DECL and CONST_DECL never have DECL_ALIGN set
2878 meaningfully, it's always 1. */
2879 case LABEL_DECL
: case CONST_DECL
:
2880 case VAR_DECL
: case PARM_DECL
: case RESULT_DECL
:
2882 gcc_assert (DECL_ALIGN (t
) != 0);
2883 return DECL_ALIGN (t
);
2889 /* Otherwise take the alignment from that of the type. */
2890 return TYPE_ALIGN (TREE_TYPE (t
));
2893 /* Return, as a tree node, the number of elements for TYPE (which is an
2894 ARRAY_TYPE) minus one. This counts only elements of the top array. */
2897 array_type_nelts (const_tree type
)
2899 tree index_type
, min
, max
;
2901 /* If they did it with unspecified bounds, then we should have already
2902 given an error about it before we got here. */
2903 if (! TYPE_DOMAIN (type
))
2904 return error_mark_node
;
2906 index_type
= TYPE_DOMAIN (type
);
2907 min
= TYPE_MIN_VALUE (index_type
);
2908 max
= TYPE_MAX_VALUE (index_type
);
2910 /* TYPE_MAX_VALUE may not be set if the array has unknown length. */
2912 return error_mark_node
;
2914 return (integer_zerop (min
)
2916 : fold_build2 (MINUS_EXPR
, TREE_TYPE (max
), max
, min
));
2919 /* If arg is static -- a reference to an object in static storage -- then
2920 return the object. This is not the same as the C meaning of `static'.
2921 If arg isn't static, return NULL. */
2926 switch (TREE_CODE (arg
))
2929 /* Nested functions are static, even though taking their address will
2930 involve a trampoline as we unnest the nested function and create
2931 the trampoline on the tree level. */
2935 return ((TREE_STATIC (arg
) || DECL_EXTERNAL (arg
))
2936 && ! DECL_THREAD_LOCAL_P (arg
)
2937 && ! DECL_DLLIMPORT_P (arg
)
2941 return ((TREE_STATIC (arg
) || DECL_EXTERNAL (arg
))
2945 return TREE_STATIC (arg
) ? arg
: NULL
;
2952 /* If the thing being referenced is not a field, then it is
2953 something language specific. */
2954 gcc_assert (TREE_CODE (TREE_OPERAND (arg
, 1)) == FIELD_DECL
);
2956 /* If we are referencing a bitfield, we can't evaluate an
2957 ADDR_EXPR at compile time and so it isn't a constant. */
2958 if (DECL_BIT_FIELD (TREE_OPERAND (arg
, 1)))
2961 return staticp (TREE_OPERAND (arg
, 0));
2967 return TREE_CONSTANT (TREE_OPERAND (arg
, 0)) ? arg
: NULL
;
2970 case ARRAY_RANGE_REF
:
2971 if (TREE_CODE (TYPE_SIZE (TREE_TYPE (arg
))) == INTEGER_CST
2972 && TREE_CODE (TREE_OPERAND (arg
, 1)) == INTEGER_CST
)
2973 return staticp (TREE_OPERAND (arg
, 0));
2977 case COMPOUND_LITERAL_EXPR
:
2978 return TREE_STATIC (COMPOUND_LITERAL_EXPR_DECL (arg
)) ? arg
: NULL
;
2988 /* Return whether OP is a DECL whose address is function-invariant. */
2991 decl_address_invariant_p (const_tree op
)
2993 /* The conditions below are slightly less strict than the one in
2996 switch (TREE_CODE (op
))
3005 if ((TREE_STATIC (op
) || DECL_EXTERNAL (op
))
3006 || DECL_THREAD_LOCAL_P (op
)
3007 || DECL_CONTEXT (op
) == current_function_decl
3008 || decl_function_context (op
) == current_function_decl
)
3013 if ((TREE_STATIC (op
) || DECL_EXTERNAL (op
))
3014 || decl_function_context (op
) == current_function_decl
)
3025 /* Return whether OP is a DECL whose address is interprocedural-invariant. */
3028 decl_address_ip_invariant_p (const_tree op
)
3030 /* The conditions below are slightly less strict than the one in
3033 switch (TREE_CODE (op
))
3041 if (((TREE_STATIC (op
) || DECL_EXTERNAL (op
))
3042 && !DECL_DLLIMPORT_P (op
))
3043 || DECL_THREAD_LOCAL_P (op
))
3048 if ((TREE_STATIC (op
) || DECL_EXTERNAL (op
)))
3060 /* Return true if T is function-invariant (internal function, does
3061 not handle arithmetic; that's handled in skip_simple_arithmetic and
3062 tree_invariant_p). */
3064 static bool tree_invariant_p (tree t
);
3067 tree_invariant_p_1 (tree t
)
3071 if (TREE_CONSTANT (t
)
3072 || (TREE_READONLY (t
) && !TREE_SIDE_EFFECTS (t
)))
3075 switch (TREE_CODE (t
))
3081 op
= TREE_OPERAND (t
, 0);
3082 while (handled_component_p (op
))
3084 switch (TREE_CODE (op
))
3087 case ARRAY_RANGE_REF
:
3088 if (!tree_invariant_p (TREE_OPERAND (op
, 1))
3089 || TREE_OPERAND (op
, 2) != NULL_TREE
3090 || TREE_OPERAND (op
, 3) != NULL_TREE
)
3095 if (TREE_OPERAND (op
, 2) != NULL_TREE
)
3101 op
= TREE_OPERAND (op
, 0);
3104 return CONSTANT_CLASS_P (op
) || decl_address_invariant_p (op
);
3113 /* Return true if T is function-invariant. */
3116 tree_invariant_p (tree t
)
3118 tree inner
= skip_simple_arithmetic (t
);
3119 return tree_invariant_p_1 (inner
);
3122 /* Wrap a SAVE_EXPR around EXPR, if appropriate.
3123 Do this to any expression which may be used in more than one place,
3124 but must be evaluated only once.
3126 Normally, expand_expr would reevaluate the expression each time.
3127 Calling save_expr produces something that is evaluated and recorded
3128 the first time expand_expr is called on it. Subsequent calls to
3129 expand_expr just reuse the recorded value.
3131 The call to expand_expr that generates code that actually computes
3132 the value is the first call *at compile time*. Subsequent calls
3133 *at compile time* generate code to use the saved value.
3134 This produces correct result provided that *at run time* control
3135 always flows through the insns made by the first expand_expr
3136 before reaching the other places where the save_expr was evaluated.
3137 You, the caller of save_expr, must make sure this is so.
3139 Constants, and certain read-only nodes, are returned with no
3140 SAVE_EXPR because that is safe. Expressions containing placeholders
3141 are not touched; see tree.def for an explanation of what these
3145 save_expr (tree expr
)
3147 tree t
= fold (expr
);
3150 /* If the tree evaluates to a constant, then we don't want to hide that
3151 fact (i.e. this allows further folding, and direct checks for constants).
3152 However, a read-only object that has side effects cannot be bypassed.
3153 Since it is no problem to reevaluate literals, we just return the
3155 inner
= skip_simple_arithmetic (t
);
3156 if (TREE_CODE (inner
) == ERROR_MARK
)
3159 if (tree_invariant_p_1 (inner
))
3162 /* If INNER contains a PLACEHOLDER_EXPR, we must evaluate it each time, since
3163 it means that the size or offset of some field of an object depends on
3164 the value within another field.
3166 Note that it must not be the case that T contains both a PLACEHOLDER_EXPR
3167 and some variable since it would then need to be both evaluated once and
3168 evaluated more than once. Front-ends must assure this case cannot
3169 happen by surrounding any such subexpressions in their own SAVE_EXPR
3170 and forcing evaluation at the proper time. */
3171 if (contains_placeholder_p (inner
))
3174 t
= build1 (SAVE_EXPR
, TREE_TYPE (expr
), t
);
3175 SET_EXPR_LOCATION (t
, EXPR_LOCATION (expr
));
3177 /* This expression might be placed ahead of a jump to ensure that the
3178 value was computed on both sides of the jump. So make sure it isn't
3179 eliminated as dead. */
3180 TREE_SIDE_EFFECTS (t
) = 1;
3184 /* Look inside EXPR into any simple arithmetic operations. Return the
3185 outermost non-arithmetic or non-invariant node. */
3188 skip_simple_arithmetic (tree expr
)
3190 /* We don't care about whether this can be used as an lvalue in this
3192 while (TREE_CODE (expr
) == NON_LVALUE_EXPR
)
3193 expr
= TREE_OPERAND (expr
, 0);
3195 /* If we have simple operations applied to a SAVE_EXPR or to a SAVE_EXPR and
3196 a constant, it will be more efficient to not make another SAVE_EXPR since
3197 it will allow better simplification and GCSE will be able to merge the
3198 computations if they actually occur. */
3201 if (UNARY_CLASS_P (expr
))
3202 expr
= TREE_OPERAND (expr
, 0);
3203 else if (BINARY_CLASS_P (expr
))
3205 if (tree_invariant_p (TREE_OPERAND (expr
, 1)))
3206 expr
= TREE_OPERAND (expr
, 0);
3207 else if (tree_invariant_p (TREE_OPERAND (expr
, 0)))
3208 expr
= TREE_OPERAND (expr
, 1);
3219 /* Look inside EXPR into simple arithmetic operations involving constants.
3220 Return the outermost non-arithmetic or non-constant node. */
3223 skip_simple_constant_arithmetic (tree expr
)
3225 while (TREE_CODE (expr
) == NON_LVALUE_EXPR
)
3226 expr
= TREE_OPERAND (expr
, 0);
3230 if (UNARY_CLASS_P (expr
))
3231 expr
= TREE_OPERAND (expr
, 0);
3232 else if (BINARY_CLASS_P (expr
))
3234 if (TREE_CONSTANT (TREE_OPERAND (expr
, 1)))
3235 expr
= TREE_OPERAND (expr
, 0);
3236 else if (TREE_CONSTANT (TREE_OPERAND (expr
, 0)))
3237 expr
= TREE_OPERAND (expr
, 1);
3248 /* Return which tree structure is used by T. */
3250 enum tree_node_structure_enum
3251 tree_node_structure (const_tree t
)
3253 const enum tree_code code
= TREE_CODE (t
);
3254 return tree_node_structure_for_code (code
);
3257 /* Set various status flags when building a CALL_EXPR object T. */
3260 process_call_operands (tree t
)
3262 bool side_effects
= TREE_SIDE_EFFECTS (t
);
3263 bool read_only
= false;
3264 int i
= call_expr_flags (t
);
3266 /* Calls have side-effects, except those to const or pure functions. */
3267 if ((i
& ECF_LOOPING_CONST_OR_PURE
) || !(i
& (ECF_CONST
| ECF_PURE
)))
3268 side_effects
= true;
3269 /* Propagate TREE_READONLY of arguments for const functions. */
3273 if (!side_effects
|| read_only
)
3274 for (i
= 1; i
< TREE_OPERAND_LENGTH (t
); i
++)
3276 tree op
= TREE_OPERAND (t
, i
);
3277 if (op
&& TREE_SIDE_EFFECTS (op
))
3278 side_effects
= true;
3279 if (op
&& !TREE_READONLY (op
) && !CONSTANT_CLASS_P (op
))
3283 TREE_SIDE_EFFECTS (t
) = side_effects
;
3284 TREE_READONLY (t
) = read_only
;
3287 /* Return true if EXP contains a PLACEHOLDER_EXPR, i.e. if it represents a
3288 size or offset that depends on a field within a record. */
3291 contains_placeholder_p (const_tree exp
)
3293 enum tree_code code
;
3298 code
= TREE_CODE (exp
);
3299 if (code
== PLACEHOLDER_EXPR
)
3302 switch (TREE_CODE_CLASS (code
))
3305 /* Don't look at any PLACEHOLDER_EXPRs that might be in index or bit
3306 position computations since they will be converted into a
3307 WITH_RECORD_EXPR involving the reference, which will assume
3308 here will be valid. */
3309 return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0));
3311 case tcc_exceptional
:
3312 if (code
== TREE_LIST
)
3313 return (CONTAINS_PLACEHOLDER_P (TREE_VALUE (exp
))
3314 || CONTAINS_PLACEHOLDER_P (TREE_CHAIN (exp
)));
3319 case tcc_comparison
:
3320 case tcc_expression
:
3324 /* Ignoring the first operand isn't quite right, but works best. */
3325 return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 1));
3328 return (CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0))
3329 || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 1))
3330 || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 2)));
3333 /* The save_expr function never wraps anything containing
3334 a PLACEHOLDER_EXPR. */
3341 switch (TREE_CODE_LENGTH (code
))
3344 return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0));
3346 return (CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0))
3347 || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 1)));
3358 const_call_expr_arg_iterator iter
;
3359 FOR_EACH_CONST_CALL_EXPR_ARG (arg
, iter
, exp
)
3360 if (CONTAINS_PLACEHOLDER_P (arg
))
3374 /* Return true if any part of the structure of TYPE involves a PLACEHOLDER_EXPR
3375 directly. This includes size, bounds, qualifiers (for QUAL_UNION_TYPE) and
3379 type_contains_placeholder_1 (const_tree type
)
3381 /* If the size contains a placeholder or the parent type (component type in
3382 the case of arrays) type involves a placeholder, this type does. */
3383 if (CONTAINS_PLACEHOLDER_P (TYPE_SIZE (type
))
3384 || CONTAINS_PLACEHOLDER_P (TYPE_SIZE_UNIT (type
))
3385 || (!POINTER_TYPE_P (type
)
3387 && type_contains_placeholder_p (TREE_TYPE (type
))))
3390 /* Now do type-specific checks. Note that the last part of the check above
3391 greatly limits what we have to do below. */
3392 switch (TREE_CODE (type
))
3400 case REFERENCE_TYPE
:
3409 case FIXED_POINT_TYPE
:
3410 /* Here we just check the bounds. */
3411 return (CONTAINS_PLACEHOLDER_P (TYPE_MIN_VALUE (type
))
3412 || CONTAINS_PLACEHOLDER_P (TYPE_MAX_VALUE (type
)));
3415 /* We have already checked the component type above, so just check the
3417 return type_contains_placeholder_p (TYPE_DOMAIN (type
));
3421 case QUAL_UNION_TYPE
:
3425 for (field
= TYPE_FIELDS (type
); field
; field
= DECL_CHAIN (field
))
3426 if (TREE_CODE (field
) == FIELD_DECL
3427 && (CONTAINS_PLACEHOLDER_P (DECL_FIELD_OFFSET (field
))
3428 || (TREE_CODE (type
) == QUAL_UNION_TYPE
3429 && CONTAINS_PLACEHOLDER_P (DECL_QUALIFIER (field
)))
3430 || type_contains_placeholder_p (TREE_TYPE (field
))))
3441 /* Wrapper around above function used to cache its result. */
3444 type_contains_placeholder_p (tree type
)
3448 /* If the contains_placeholder_bits field has been initialized,
3449 then we know the answer. */
3450 if (TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) > 0)
3451 return TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) - 1;
3453 /* Indicate that we've seen this type node, and the answer is false.
3454 This is what we want to return if we run into recursion via fields. */
3455 TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) = 1;
3457 /* Compute the real value. */
3458 result
= type_contains_placeholder_1 (type
);
3460 /* Store the real value. */
3461 TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) = result
+ 1;
3466 /* Push tree EXP onto vector QUEUE if it is not already present. */
3469 push_without_duplicates (tree exp
, vec
<tree
> *queue
)
3474 FOR_EACH_VEC_ELT (*queue
, i
, iter
)
3475 if (simple_cst_equal (iter
, exp
) == 1)
3479 queue
->safe_push (exp
);
3482 /* Given a tree EXP, find all occurrences of references to fields
3483 in a PLACEHOLDER_EXPR and place them in vector REFS without
3484 duplicates. Also record VAR_DECLs and CONST_DECLs. Note that
3485 we assume here that EXP contains only arithmetic expressions
3486 or CALL_EXPRs with PLACEHOLDER_EXPRs occurring only in their
3490 find_placeholder_in_expr (tree exp
, vec
<tree
> *refs
)
3492 enum tree_code code
= TREE_CODE (exp
);
3496 /* We handle TREE_LIST and COMPONENT_REF separately. */
3497 if (code
== TREE_LIST
)
3499 FIND_PLACEHOLDER_IN_EXPR (TREE_CHAIN (exp
), refs
);
3500 FIND_PLACEHOLDER_IN_EXPR (TREE_VALUE (exp
), refs
);
3502 else if (code
== COMPONENT_REF
)
3504 for (inner
= TREE_OPERAND (exp
, 0);
3505 REFERENCE_CLASS_P (inner
);
3506 inner
= TREE_OPERAND (inner
, 0))
3509 if (TREE_CODE (inner
) == PLACEHOLDER_EXPR
)
3510 push_without_duplicates (exp
, refs
);
3512 FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), refs
);
3515 switch (TREE_CODE_CLASS (code
))
3520 case tcc_declaration
:
3521 /* Variables allocated to static storage can stay. */
3522 if (!TREE_STATIC (exp
))
3523 push_without_duplicates (exp
, refs
);
3526 case tcc_expression
:
3527 /* This is the pattern built in ada/make_aligning_type. */
3528 if (code
== ADDR_EXPR
3529 && TREE_CODE (TREE_OPERAND (exp
, 0)) == PLACEHOLDER_EXPR
)
3531 push_without_duplicates (exp
, refs
);
3535 /* Fall through... */
3537 case tcc_exceptional
:
3540 case tcc_comparison
:
3542 for (i
= 0; i
< TREE_CODE_LENGTH (code
); i
++)
3543 FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, i
), refs
);
3547 for (i
= 1; i
< TREE_OPERAND_LENGTH (exp
); i
++)
3548 FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, i
), refs
);
3556 /* Given a tree EXP, a FIELD_DECL F, and a replacement value R,
3557 return a tree with all occurrences of references to F in a
3558 PLACEHOLDER_EXPR replaced by R. Also handle VAR_DECLs and
3559 CONST_DECLs. Note that we assume here that EXP contains only
3560 arithmetic expressions or CALL_EXPRs with PLACEHOLDER_EXPRs
3561 occurring only in their argument list. */
3564 substitute_in_expr (tree exp
, tree f
, tree r
)
3566 enum tree_code code
= TREE_CODE (exp
);
3567 tree op0
, op1
, op2
, op3
;
3570 /* We handle TREE_LIST and COMPONENT_REF separately. */
3571 if (code
== TREE_LIST
)
3573 op0
= SUBSTITUTE_IN_EXPR (TREE_CHAIN (exp
), f
, r
);
3574 op1
= SUBSTITUTE_IN_EXPR (TREE_VALUE (exp
), f
, r
);
3575 if (op0
== TREE_CHAIN (exp
) && op1
== TREE_VALUE (exp
))
3578 return tree_cons (TREE_PURPOSE (exp
), op1
, op0
);
3580 else if (code
== COMPONENT_REF
)
3584 /* If this expression is getting a value from a PLACEHOLDER_EXPR
3585 and it is the right field, replace it with R. */
3586 for (inner
= TREE_OPERAND (exp
, 0);
3587 REFERENCE_CLASS_P (inner
);
3588 inner
= TREE_OPERAND (inner
, 0))
3592 op1
= TREE_OPERAND (exp
, 1);
3594 if (TREE_CODE (inner
) == PLACEHOLDER_EXPR
&& op1
== f
)
3597 /* If this expression hasn't been completed let, leave it alone. */
3598 if (TREE_CODE (inner
) == PLACEHOLDER_EXPR
&& !TREE_TYPE (inner
))
3601 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3602 if (op0
== TREE_OPERAND (exp
, 0))
3606 = fold_build3 (COMPONENT_REF
, TREE_TYPE (exp
), op0
, op1
, NULL_TREE
);
3609 switch (TREE_CODE_CLASS (code
))
3614 case tcc_declaration
:
3620 case tcc_expression
:
3624 /* Fall through... */
3626 case tcc_exceptional
:
3629 case tcc_comparison
:
3631 switch (TREE_CODE_LENGTH (code
))
3637 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3638 if (op0
== TREE_OPERAND (exp
, 0))
3641 new_tree
= fold_build1 (code
, TREE_TYPE (exp
), op0
);
3645 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3646 op1
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 1), f
, r
);
3648 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1))
3651 new_tree
= fold_build2 (code
, TREE_TYPE (exp
), op0
, op1
);
3655 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3656 op1
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 1), f
, r
);
3657 op2
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 2), f
, r
);
3659 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3660 && op2
== TREE_OPERAND (exp
, 2))
3663 new_tree
= fold_build3 (code
, TREE_TYPE (exp
), op0
, op1
, op2
);
3667 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3668 op1
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 1), f
, r
);
3669 op2
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 2), f
, r
);
3670 op3
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 3), f
, r
);
3672 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3673 && op2
== TREE_OPERAND (exp
, 2)
3674 && op3
== TREE_OPERAND (exp
, 3))
3678 = fold (build4 (code
, TREE_TYPE (exp
), op0
, op1
, op2
, op3
));
3690 new_tree
= NULL_TREE
;
3692 /* If we are trying to replace F with a constant, inline back
3693 functions which do nothing else than computing a value from
3694 the arguments they are passed. This makes it possible to
3695 fold partially or entirely the replacement expression. */
3696 if (CONSTANT_CLASS_P (r
) && code
== CALL_EXPR
)
3698 tree t
= maybe_inline_call_in_expr (exp
);
3700 return SUBSTITUTE_IN_EXPR (t
, f
, r
);
3703 for (i
= 1; i
< TREE_OPERAND_LENGTH (exp
); i
++)
3705 tree op
= TREE_OPERAND (exp
, i
);
3706 tree new_op
= SUBSTITUTE_IN_EXPR (op
, f
, r
);
3710 new_tree
= copy_node (exp
);
3711 TREE_OPERAND (new_tree
, i
) = new_op
;
3717 new_tree
= fold (new_tree
);
3718 if (TREE_CODE (new_tree
) == CALL_EXPR
)
3719 process_call_operands (new_tree
);
3730 TREE_READONLY (new_tree
) |= TREE_READONLY (exp
);
3732 if (code
== INDIRECT_REF
|| code
== ARRAY_REF
|| code
== ARRAY_RANGE_REF
)
3733 TREE_THIS_NOTRAP (new_tree
) |= TREE_THIS_NOTRAP (exp
);
3738 /* Similar, but look for a PLACEHOLDER_EXPR in EXP and find a replacement
3739 for it within OBJ, a tree that is an object or a chain of references. */
3742 substitute_placeholder_in_expr (tree exp
, tree obj
)
3744 enum tree_code code
= TREE_CODE (exp
);
3745 tree op0
, op1
, op2
, op3
;
3748 /* If this is a PLACEHOLDER_EXPR, see if we find a corresponding type
3749 in the chain of OBJ. */
3750 if (code
== PLACEHOLDER_EXPR
)
3752 tree need_type
= TYPE_MAIN_VARIANT (TREE_TYPE (exp
));
3755 for (elt
= obj
; elt
!= 0;
3756 elt
= ((TREE_CODE (elt
) == COMPOUND_EXPR
3757 || TREE_CODE (elt
) == COND_EXPR
)
3758 ? TREE_OPERAND (elt
, 1)
3759 : (REFERENCE_CLASS_P (elt
)
3760 || UNARY_CLASS_P (elt
)
3761 || BINARY_CLASS_P (elt
)
3762 || VL_EXP_CLASS_P (elt
)
3763 || EXPRESSION_CLASS_P (elt
))
3764 ? TREE_OPERAND (elt
, 0) : 0))
3765 if (TYPE_MAIN_VARIANT (TREE_TYPE (elt
)) == need_type
)
3768 for (elt
= obj
; elt
!= 0;
3769 elt
= ((TREE_CODE (elt
) == COMPOUND_EXPR
3770 || TREE_CODE (elt
) == COND_EXPR
)
3771 ? TREE_OPERAND (elt
, 1)
3772 : (REFERENCE_CLASS_P (elt
)
3773 || UNARY_CLASS_P (elt
)
3774 || BINARY_CLASS_P (elt
)
3775 || VL_EXP_CLASS_P (elt
)
3776 || EXPRESSION_CLASS_P (elt
))
3777 ? TREE_OPERAND (elt
, 0) : 0))
3778 if (POINTER_TYPE_P (TREE_TYPE (elt
))
3779 && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (elt
)))
3781 return fold_build1 (INDIRECT_REF
, need_type
, elt
);
3783 /* If we didn't find it, return the original PLACEHOLDER_EXPR. If it
3784 survives until RTL generation, there will be an error. */
3788 /* TREE_LIST is special because we need to look at TREE_VALUE
3789 and TREE_CHAIN, not TREE_OPERANDS. */
3790 else if (code
== TREE_LIST
)
3792 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_CHAIN (exp
), obj
);
3793 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_VALUE (exp
), obj
);
3794 if (op0
== TREE_CHAIN (exp
) && op1
== TREE_VALUE (exp
))
3797 return tree_cons (TREE_PURPOSE (exp
), op1
, op0
);
3800 switch (TREE_CODE_CLASS (code
))
3803 case tcc_declaration
:
3806 case tcc_exceptional
:
3809 case tcc_comparison
:
3810 case tcc_expression
:
3813 switch (TREE_CODE_LENGTH (code
))
3819 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
3820 if (op0
== TREE_OPERAND (exp
, 0))
3823 new_tree
= fold_build1 (code
, TREE_TYPE (exp
), op0
);
3827 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
3828 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 1), obj
);
3830 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1))
3833 new_tree
= fold_build2 (code
, TREE_TYPE (exp
), op0
, op1
);
3837 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
3838 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 1), obj
);
3839 op2
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 2), obj
);
3841 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3842 && op2
== TREE_OPERAND (exp
, 2))
3845 new_tree
= fold_build3 (code
, TREE_TYPE (exp
), op0
, op1
, op2
);
3849 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
3850 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 1), obj
);
3851 op2
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 2), obj
);
3852 op3
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 3), obj
);
3854 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3855 && op2
== TREE_OPERAND (exp
, 2)
3856 && op3
== TREE_OPERAND (exp
, 3))
3860 = fold (build4 (code
, TREE_TYPE (exp
), op0
, op1
, op2
, op3
));
3872 new_tree
= NULL_TREE
;
3874 for (i
= 1; i
< TREE_OPERAND_LENGTH (exp
); i
++)
3876 tree op
= TREE_OPERAND (exp
, i
);
3877 tree new_op
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (op
, obj
);
3881 new_tree
= copy_node (exp
);
3882 TREE_OPERAND (new_tree
, i
) = new_op
;
3888 new_tree
= fold (new_tree
);
3889 if (TREE_CODE (new_tree
) == CALL_EXPR
)
3890 process_call_operands (new_tree
);
3901 TREE_READONLY (new_tree
) |= TREE_READONLY (exp
);
3903 if (code
== INDIRECT_REF
|| code
== ARRAY_REF
|| code
== ARRAY_RANGE_REF
)
3904 TREE_THIS_NOTRAP (new_tree
) |= TREE_THIS_NOTRAP (exp
);
3910 /* Subroutine of stabilize_reference; this is called for subtrees of
3911 references. Any expression with side-effects must be put in a SAVE_EXPR
3912 to ensure that it is only evaluated once.
3914 We don't put SAVE_EXPR nodes around everything, because assigning very
3915 simple expressions to temporaries causes us to miss good opportunities
3916 for optimizations. Among other things, the opportunity to fold in the
3917 addition of a constant into an addressing mode often gets lost, e.g.
3918 "y[i+1] += x;". In general, we take the approach that we should not make
3919 an assignment unless we are forced into it - i.e., that any non-side effect
3920 operator should be allowed, and that cse should take care of coalescing
3921 multiple utterances of the same expression should that prove fruitful. */
3924 stabilize_reference_1 (tree e
)
3927 enum tree_code code
= TREE_CODE (e
);
3929 /* We cannot ignore const expressions because it might be a reference
3930 to a const array but whose index contains side-effects. But we can
3931 ignore things that are actual constant or that already have been
3932 handled by this function. */
3934 if (tree_invariant_p (e
))
3937 switch (TREE_CODE_CLASS (code
))
3939 case tcc_exceptional
:
3941 case tcc_declaration
:
3942 case tcc_comparison
:
3944 case tcc_expression
:
3947 /* If the expression has side-effects, then encase it in a SAVE_EXPR
3948 so that it will only be evaluated once. */
3949 /* The reference (r) and comparison (<) classes could be handled as
3950 below, but it is generally faster to only evaluate them once. */
3951 if (TREE_SIDE_EFFECTS (e
))
3952 return save_expr (e
);
3956 /* Constants need no processing. In fact, we should never reach
3961 /* Division is slow and tends to be compiled with jumps,
3962 especially the division by powers of 2 that is often
3963 found inside of an array reference. So do it just once. */
3964 if (code
== TRUNC_DIV_EXPR
|| code
== TRUNC_MOD_EXPR
3965 || code
== FLOOR_DIV_EXPR
|| code
== FLOOR_MOD_EXPR
3966 || code
== CEIL_DIV_EXPR
|| code
== CEIL_MOD_EXPR
3967 || code
== ROUND_DIV_EXPR
|| code
== ROUND_MOD_EXPR
)
3968 return save_expr (e
);
3969 /* Recursively stabilize each operand. */
3970 result
= build_nt (code
, stabilize_reference_1 (TREE_OPERAND (e
, 0)),
3971 stabilize_reference_1 (TREE_OPERAND (e
, 1)));
3975 /* Recursively stabilize each operand. */
3976 result
= build_nt (code
, stabilize_reference_1 (TREE_OPERAND (e
, 0)));
3983 TREE_TYPE (result
) = TREE_TYPE (e
);
3984 TREE_READONLY (result
) = TREE_READONLY (e
);
3985 TREE_SIDE_EFFECTS (result
) = TREE_SIDE_EFFECTS (e
);
3986 TREE_THIS_VOLATILE (result
) = TREE_THIS_VOLATILE (e
);
3991 /* Stabilize a reference so that we can use it any number of times
3992 without causing its operands to be evaluated more than once.
3993 Returns the stabilized reference. This works by means of save_expr,
3994 so see the caveats in the comments about save_expr.
3996 Also allows conversion expressions whose operands are references.
3997 Any other kind of expression is returned unchanged. */
4000 stabilize_reference (tree ref
)
4003 enum tree_code code
= TREE_CODE (ref
);
4010 /* No action is needed in this case. */
4015 case FIX_TRUNC_EXPR
:
4016 result
= build_nt (code
, stabilize_reference (TREE_OPERAND (ref
, 0)));
4020 result
= build_nt (INDIRECT_REF
,
4021 stabilize_reference_1 (TREE_OPERAND (ref
, 0)));
4025 result
= build_nt (COMPONENT_REF
,
4026 stabilize_reference (TREE_OPERAND (ref
, 0)),
4027 TREE_OPERAND (ref
, 1), NULL_TREE
);
4031 result
= build_nt (BIT_FIELD_REF
,
4032 stabilize_reference (TREE_OPERAND (ref
, 0)),
4033 TREE_OPERAND (ref
, 1), TREE_OPERAND (ref
, 2));
4037 result
= build_nt (ARRAY_REF
,
4038 stabilize_reference (TREE_OPERAND (ref
, 0)),
4039 stabilize_reference_1 (TREE_OPERAND (ref
, 1)),
4040 TREE_OPERAND (ref
, 2), TREE_OPERAND (ref
, 3));
4043 case ARRAY_RANGE_REF
:
4044 result
= build_nt (ARRAY_RANGE_REF
,
4045 stabilize_reference (TREE_OPERAND (ref
, 0)),
4046 stabilize_reference_1 (TREE_OPERAND (ref
, 1)),
4047 TREE_OPERAND (ref
, 2), TREE_OPERAND (ref
, 3));
4051 /* We cannot wrap the first expression in a SAVE_EXPR, as then
4052 it wouldn't be ignored. This matters when dealing with
4054 return stabilize_reference_1 (ref
);
4056 /* If arg isn't a kind of lvalue we recognize, make no change.
4057 Caller should recognize the error for an invalid lvalue. */
4062 return error_mark_node
;
4065 TREE_TYPE (result
) = TREE_TYPE (ref
);
4066 TREE_READONLY (result
) = TREE_READONLY (ref
);
4067 TREE_SIDE_EFFECTS (result
) = TREE_SIDE_EFFECTS (ref
);
4068 TREE_THIS_VOLATILE (result
) = TREE_THIS_VOLATILE (ref
);
4073 /* Low-level constructors for expressions. */
4075 /* A helper function for build1 and constant folders. Set TREE_CONSTANT,
4076 and TREE_SIDE_EFFECTS for an ADDR_EXPR. */
4079 recompute_tree_invariant_for_addr_expr (tree t
)
4082 bool tc
= true, se
= false;
4084 /* We started out assuming this address is both invariant and constant, but
4085 does not have side effects. Now go down any handled components and see if
4086 any of them involve offsets that are either non-constant or non-invariant.
4087 Also check for side-effects.
4089 ??? Note that this code makes no attempt to deal with the case where
4090 taking the address of something causes a copy due to misalignment. */
4092 #define UPDATE_FLAGS(NODE) \
4093 do { tree _node = (NODE); \
4094 if (_node && !TREE_CONSTANT (_node)) tc = false; \
4095 if (_node && TREE_SIDE_EFFECTS (_node)) se = true; } while (0)
4097 for (node
= TREE_OPERAND (t
, 0); handled_component_p (node
);
4098 node
= TREE_OPERAND (node
, 0))
4100 /* If the first operand doesn't have an ARRAY_TYPE, this is a bogus
4101 array reference (probably made temporarily by the G++ front end),
4102 so ignore all the operands. */
4103 if ((TREE_CODE (node
) == ARRAY_REF
4104 || TREE_CODE (node
) == ARRAY_RANGE_REF
)
4105 && TREE_CODE (TREE_TYPE (TREE_OPERAND (node
, 0))) == ARRAY_TYPE
)
4107 UPDATE_FLAGS (TREE_OPERAND (node
, 1));
4108 if (TREE_OPERAND (node
, 2))
4109 UPDATE_FLAGS (TREE_OPERAND (node
, 2));
4110 if (TREE_OPERAND (node
, 3))
4111 UPDATE_FLAGS (TREE_OPERAND (node
, 3));
4113 /* Likewise, just because this is a COMPONENT_REF doesn't mean we have a
4114 FIELD_DECL, apparently. The G++ front end can put something else
4115 there, at least temporarily. */
4116 else if (TREE_CODE (node
) == COMPONENT_REF
4117 && TREE_CODE (TREE_OPERAND (node
, 1)) == FIELD_DECL
)
4119 if (TREE_OPERAND (node
, 2))
4120 UPDATE_FLAGS (TREE_OPERAND (node
, 2));
4124 node
= lang_hooks
.expr_to_decl (node
, &tc
, &se
);
4126 /* Now see what's inside. If it's an INDIRECT_REF, copy our properties from
4127 the address, since &(*a)->b is a form of addition. If it's a constant, the
4128 address is constant too. If it's a decl, its address is constant if the
4129 decl is static. Everything else is not constant and, furthermore,
4130 taking the address of a volatile variable is not volatile. */
4131 if (TREE_CODE (node
) == INDIRECT_REF
4132 || TREE_CODE (node
) == MEM_REF
)
4133 UPDATE_FLAGS (TREE_OPERAND (node
, 0));
4134 else if (CONSTANT_CLASS_P (node
))
4136 else if (DECL_P (node
))
4137 tc
&= (staticp (node
) != NULL_TREE
);
4141 se
|= TREE_SIDE_EFFECTS (node
);
4145 TREE_CONSTANT (t
) = tc
;
4146 TREE_SIDE_EFFECTS (t
) = se
;
4150 /* Build an expression of code CODE, data type TYPE, and operands as
4151 specified. Expressions and reference nodes can be created this way.
4152 Constants, decls, types and misc nodes cannot be.
4154 We define 5 non-variadic functions, from 0 to 4 arguments. This is
4155 enough for all extant tree codes. */
4158 build0_stat (enum tree_code code
, tree tt MEM_STAT_DECL
)
4162 gcc_assert (TREE_CODE_LENGTH (code
) == 0);
4164 t
= make_node_stat (code PASS_MEM_STAT
);
4171 build1_stat (enum tree_code code
, tree type
, tree node MEM_STAT_DECL
)
4173 int length
= sizeof (struct tree_exp
);
4176 record_node_allocation_statistics (code
, length
);
4178 gcc_assert (TREE_CODE_LENGTH (code
) == 1);
4180 t
= ggc_alloc_tree_node_stat (length PASS_MEM_STAT
);
4182 memset (t
, 0, sizeof (struct tree_common
));
4184 TREE_SET_CODE (t
, code
);
4186 TREE_TYPE (t
) = type
;
4187 SET_EXPR_LOCATION (t
, UNKNOWN_LOCATION
);
4188 TREE_OPERAND (t
, 0) = node
;
4189 if (node
&& !TYPE_P (node
))
4191 TREE_SIDE_EFFECTS (t
) = TREE_SIDE_EFFECTS (node
);
4192 TREE_READONLY (t
) = TREE_READONLY (node
);
4195 if (TREE_CODE_CLASS (code
) == tcc_statement
)
4196 TREE_SIDE_EFFECTS (t
) = 1;
4200 /* All of these have side-effects, no matter what their
4202 TREE_SIDE_EFFECTS (t
) = 1;
4203 TREE_READONLY (t
) = 0;
4207 /* Whether a dereference is readonly has nothing to do with whether
4208 its operand is readonly. */
4209 TREE_READONLY (t
) = 0;
4214 recompute_tree_invariant_for_addr_expr (t
);
4218 if ((TREE_CODE_CLASS (code
) == tcc_unary
|| code
== VIEW_CONVERT_EXPR
)
4219 && node
&& !TYPE_P (node
)
4220 && TREE_CONSTANT (node
))
4221 TREE_CONSTANT (t
) = 1;
4222 if (TREE_CODE_CLASS (code
) == tcc_reference
4223 && node
&& TREE_THIS_VOLATILE (node
))
4224 TREE_THIS_VOLATILE (t
) = 1;
4231 #define PROCESS_ARG(N) \
4233 TREE_OPERAND (t, N) = arg##N; \
4234 if (arg##N &&!TYPE_P (arg##N)) \
4236 if (TREE_SIDE_EFFECTS (arg##N)) \
4238 if (!TREE_READONLY (arg##N) \
4239 && !CONSTANT_CLASS_P (arg##N)) \
4240 (void) (read_only = 0); \
4241 if (!TREE_CONSTANT (arg##N)) \
4242 (void) (constant = 0); \
4247 build2_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1 MEM_STAT_DECL
)
4249 bool constant
, read_only
, side_effects
;
4252 gcc_assert (TREE_CODE_LENGTH (code
) == 2);
4254 if ((code
== MINUS_EXPR
|| code
== PLUS_EXPR
|| code
== MULT_EXPR
)
4255 && arg0
&& arg1
&& tt
&& POINTER_TYPE_P (tt
)
4256 /* When sizetype precision doesn't match that of pointers
4257 we need to be able to build explicit extensions or truncations
4258 of the offset argument. */
4259 && TYPE_PRECISION (sizetype
) == TYPE_PRECISION (tt
))
4260 gcc_assert (TREE_CODE (arg0
) == INTEGER_CST
4261 && TREE_CODE (arg1
) == INTEGER_CST
);
4263 if (code
== POINTER_PLUS_EXPR
&& arg0
&& arg1
&& tt
)
4264 gcc_assert (POINTER_TYPE_P (tt
) && POINTER_TYPE_P (TREE_TYPE (arg0
))
4265 && ptrofftype_p (TREE_TYPE (arg1
)));
4267 t
= make_node_stat (code PASS_MEM_STAT
);
4270 /* Below, we automatically set TREE_SIDE_EFFECTS and TREE_READONLY for the
4271 result based on those same flags for the arguments. But if the
4272 arguments aren't really even `tree' expressions, we shouldn't be trying
4275 /* Expressions without side effects may be constant if their
4276 arguments are as well. */
4277 constant
= (TREE_CODE_CLASS (code
) == tcc_comparison
4278 || TREE_CODE_CLASS (code
) == tcc_binary
);
4280 side_effects
= TREE_SIDE_EFFECTS (t
);
4285 TREE_READONLY (t
) = read_only
;
4286 TREE_CONSTANT (t
) = constant
;
4287 TREE_SIDE_EFFECTS (t
) = side_effects
;
4288 TREE_THIS_VOLATILE (t
)
4289 = (TREE_CODE_CLASS (code
) == tcc_reference
4290 && arg0
&& TREE_THIS_VOLATILE (arg0
));
4297 build3_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
4298 tree arg2 MEM_STAT_DECL
)
4300 bool constant
, read_only
, side_effects
;
4303 gcc_assert (TREE_CODE_LENGTH (code
) == 3);
4304 gcc_assert (TREE_CODE_CLASS (code
) != tcc_vl_exp
);
4306 t
= make_node_stat (code PASS_MEM_STAT
);
4311 /* As a special exception, if COND_EXPR has NULL branches, we
4312 assume that it is a gimple statement and always consider
4313 it to have side effects. */
4314 if (code
== COND_EXPR
4315 && tt
== void_type_node
4316 && arg1
== NULL_TREE
4317 && arg2
== NULL_TREE
)
4318 side_effects
= true;
4320 side_effects
= TREE_SIDE_EFFECTS (t
);
4326 if (code
== COND_EXPR
)
4327 TREE_READONLY (t
) = read_only
;
4329 TREE_SIDE_EFFECTS (t
) = side_effects
;
4330 TREE_THIS_VOLATILE (t
)
4331 = (TREE_CODE_CLASS (code
) == tcc_reference
4332 && arg0
&& TREE_THIS_VOLATILE (arg0
));
4338 build4_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
4339 tree arg2
, tree arg3 MEM_STAT_DECL
)
4341 bool constant
, read_only
, side_effects
;
4344 gcc_assert (TREE_CODE_LENGTH (code
) == 4);
4346 t
= make_node_stat (code PASS_MEM_STAT
);
4349 side_effects
= TREE_SIDE_EFFECTS (t
);
4356 TREE_SIDE_EFFECTS (t
) = side_effects
;
4357 TREE_THIS_VOLATILE (t
)
4358 = (TREE_CODE_CLASS (code
) == tcc_reference
4359 && arg0
&& TREE_THIS_VOLATILE (arg0
));
4365 build5_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
4366 tree arg2
, tree arg3
, tree arg4 MEM_STAT_DECL
)
4368 bool constant
, read_only
, side_effects
;
4371 gcc_assert (TREE_CODE_LENGTH (code
) == 5);
4373 t
= make_node_stat (code PASS_MEM_STAT
);
4376 side_effects
= TREE_SIDE_EFFECTS (t
);
4384 TREE_SIDE_EFFECTS (t
) = side_effects
;
4385 TREE_THIS_VOLATILE (t
)
4386 = (TREE_CODE_CLASS (code
) == tcc_reference
4387 && arg0
&& TREE_THIS_VOLATILE (arg0
));
4392 /* Build a simple MEM_REF tree with the sematics of a plain INDIRECT_REF
4393 on the pointer PTR. */
4396 build_simple_mem_ref_loc (location_t loc
, tree ptr
)
4398 HOST_WIDE_INT offset
= 0;
4399 tree ptype
= TREE_TYPE (ptr
);
4401 /* For convenience allow addresses that collapse to a simple base
4403 if (TREE_CODE (ptr
) == ADDR_EXPR
4404 && (handled_component_p (TREE_OPERAND (ptr
, 0))
4405 || TREE_CODE (TREE_OPERAND (ptr
, 0)) == MEM_REF
))
4407 ptr
= get_addr_base_and_unit_offset (TREE_OPERAND (ptr
, 0), &offset
);
4409 ptr
= build_fold_addr_expr (ptr
);
4410 gcc_assert (is_gimple_reg (ptr
) || is_gimple_min_invariant (ptr
));
4412 tem
= build2 (MEM_REF
, TREE_TYPE (ptype
),
4413 ptr
, build_int_cst (ptype
, offset
));
4414 SET_EXPR_LOCATION (tem
, loc
);
4418 /* Return the constant offset of a MEM_REF or TARGET_MEM_REF tree T. */
4421 mem_ref_offset (const_tree t
)
4423 return offset_int::from (TREE_OPERAND (t
, 1), SIGNED
);
4426 /* Return an invariant ADDR_EXPR of type TYPE taking the address of BASE
4427 offsetted by OFFSET units. */
4430 build_invariant_address (tree type
, tree base
, HOST_WIDE_INT offset
)
4432 tree ref
= fold_build2 (MEM_REF
, TREE_TYPE (type
),
4433 build_fold_addr_expr (base
),
4434 build_int_cst (ptr_type_node
, offset
));
4435 tree addr
= build1 (ADDR_EXPR
, type
, ref
);
4436 recompute_tree_invariant_for_addr_expr (addr
);
4440 /* Similar except don't specify the TREE_TYPE
4441 and leave the TREE_SIDE_EFFECTS as 0.
4442 It is permissible for arguments to be null,
4443 or even garbage if their values do not matter. */
4446 build_nt (enum tree_code code
, ...)
4453 gcc_assert (TREE_CODE_CLASS (code
) != tcc_vl_exp
);
4457 t
= make_node (code
);
4458 length
= TREE_CODE_LENGTH (code
);
4460 for (i
= 0; i
< length
; i
++)
4461 TREE_OPERAND (t
, i
) = va_arg (p
, tree
);
4467 /* Similar to build_nt, but for creating a CALL_EXPR object with a
4471 build_nt_call_vec (tree fn
, vec
<tree
, va_gc
> *args
)
4476 ret
= build_vl_exp (CALL_EXPR
, vec_safe_length (args
) + 3);
4477 CALL_EXPR_FN (ret
) = fn
;
4478 CALL_EXPR_STATIC_CHAIN (ret
) = NULL_TREE
;
4479 FOR_EACH_VEC_SAFE_ELT (args
, ix
, t
)
4480 CALL_EXPR_ARG (ret
, ix
) = t
;
4484 /* Create a DECL_... node of code CODE, name NAME and data type TYPE.
4485 We do NOT enter this node in any sort of symbol table.
4487 LOC is the location of the decl.
4489 layout_decl is used to set up the decl's storage layout.
4490 Other slots are initialized to 0 or null pointers. */
4493 build_decl_stat (location_t loc
, enum tree_code code
, tree name
,
4494 tree type MEM_STAT_DECL
)
4498 t
= make_node_stat (code PASS_MEM_STAT
);
4499 DECL_SOURCE_LOCATION (t
) = loc
;
4501 /* if (type == error_mark_node)
4502 type = integer_type_node; */
4503 /* That is not done, deliberately, so that having error_mark_node
4504 as the type can suppress useless errors in the use of this variable. */
4506 DECL_NAME (t
) = name
;
4507 TREE_TYPE (t
) = type
;
4509 if (code
== VAR_DECL
|| code
== PARM_DECL
|| code
== RESULT_DECL
)
4515 /* Builds and returns function declaration with NAME and TYPE. */
4518 build_fn_decl (const char *name
, tree type
)
4520 tree id
= get_identifier (name
);
4521 tree decl
= build_decl (input_location
, FUNCTION_DECL
, id
, type
);
4523 DECL_EXTERNAL (decl
) = 1;
4524 TREE_PUBLIC (decl
) = 1;
4525 DECL_ARTIFICIAL (decl
) = 1;
4526 TREE_NOTHROW (decl
) = 1;
4531 vec
<tree
, va_gc
> *all_translation_units
;
4533 /* Builds a new translation-unit decl with name NAME, queues it in the
4534 global list of translation-unit decls and returns it. */
4537 build_translation_unit_decl (tree name
)
4539 tree tu
= build_decl (UNKNOWN_LOCATION
, TRANSLATION_UNIT_DECL
,
4541 TRANSLATION_UNIT_LANGUAGE (tu
) = lang_hooks
.name
;
4542 vec_safe_push (all_translation_units
, tu
);
4547 /* BLOCK nodes are used to represent the structure of binding contours
4548 and declarations, once those contours have been exited and their contents
4549 compiled. This information is used for outputting debugging info. */
4552 build_block (tree vars
, tree subblocks
, tree supercontext
, tree chain
)
4554 tree block
= make_node (BLOCK
);
4556 BLOCK_VARS (block
) = vars
;
4557 BLOCK_SUBBLOCKS (block
) = subblocks
;
4558 BLOCK_SUPERCONTEXT (block
) = supercontext
;
4559 BLOCK_CHAIN (block
) = chain
;
4564 /* Like SET_EXPR_LOCATION, but make sure the tree can have a location.
4566 LOC is the location to use in tree T. */
4569 protected_set_expr_location (tree t
, location_t loc
)
4571 if (t
&& CAN_HAVE_LOCATION_P (t
))
4572 SET_EXPR_LOCATION (t
, loc
);
4575 /* Return a declaration like DDECL except that its DECL_ATTRIBUTES
4579 build_decl_attribute_variant (tree ddecl
, tree attribute
)
4581 DECL_ATTRIBUTES (ddecl
) = attribute
;
4585 /* Return a type like TTYPE except that its TYPE_ATTRIBUTE
4586 is ATTRIBUTE and its qualifiers are QUALS.
4588 Record such modified types already made so we don't make duplicates. */
4591 build_type_attribute_qual_variant (tree ttype
, tree attribute
, int quals
)
4593 if (! attribute_list_equal (TYPE_ATTRIBUTES (ttype
), attribute
))
4595 inchash::hash hstate
;
4599 enum tree_code code
= TREE_CODE (ttype
);
4601 /* Building a distinct copy of a tagged type is inappropriate; it
4602 causes breakage in code that expects there to be a one-to-one
4603 relationship between a struct and its fields.
4604 build_duplicate_type is another solution (as used in
4605 handle_transparent_union_attribute), but that doesn't play well
4606 with the stronger C++ type identity model. */
4607 if (TREE_CODE (ttype
) == RECORD_TYPE
4608 || TREE_CODE (ttype
) == UNION_TYPE
4609 || TREE_CODE (ttype
) == QUAL_UNION_TYPE
4610 || TREE_CODE (ttype
) == ENUMERAL_TYPE
)
4612 warning (OPT_Wattributes
,
4613 "ignoring attributes applied to %qT after definition",
4614 TYPE_MAIN_VARIANT (ttype
));
4615 return build_qualified_type (ttype
, quals
);
4618 ttype
= build_qualified_type (ttype
, TYPE_UNQUALIFIED
);
4619 ntype
= build_distinct_type_copy (ttype
);
4621 TYPE_ATTRIBUTES (ntype
) = attribute
;
4623 hstate
.add_int (code
);
4624 if (TREE_TYPE (ntype
))
4625 hstate
.add_object (TYPE_HASH (TREE_TYPE (ntype
)));
4626 attribute_hash_list (attribute
, hstate
);
4628 switch (TREE_CODE (ntype
))
4631 type_hash_list (TYPE_ARG_TYPES (ntype
), hstate
);
4634 if (TYPE_DOMAIN (ntype
))
4635 hstate
.add_object (TYPE_HASH (TYPE_DOMAIN (ntype
)));
4638 t
= TYPE_MAX_VALUE (ntype
);
4639 for (i
= 0; i
< TREE_INT_CST_NUNITS (t
); i
++)
4640 hstate
.add_object (TREE_INT_CST_ELT (t
, i
));
4643 case FIXED_POINT_TYPE
:
4645 unsigned int precision
= TYPE_PRECISION (ntype
);
4646 hstate
.add_object (precision
);
4653 ntype
= type_hash_canon (hstate
.end(), ntype
);
4655 /* If the target-dependent attributes make NTYPE different from
4656 its canonical type, we will need to use structural equality
4657 checks for this type. */
4658 if (TYPE_STRUCTURAL_EQUALITY_P (ttype
)
4659 || !comp_type_attributes (ntype
, ttype
))
4660 SET_TYPE_STRUCTURAL_EQUALITY (ntype
);
4661 else if (TYPE_CANONICAL (ntype
) == ntype
)
4662 TYPE_CANONICAL (ntype
) = TYPE_CANONICAL (ttype
);
4664 ttype
= build_qualified_type (ntype
, quals
);
4666 else if (TYPE_QUALS (ttype
) != quals
)
4667 ttype
= build_qualified_type (ttype
, quals
);
4672 /* Check if "omp declare simd" attribute arguments, CLAUSES1 and CLAUSES2, are
4676 omp_declare_simd_clauses_equal (tree clauses1
, tree clauses2
)
4679 for (cl1
= clauses1
, cl2
= clauses2
;
4681 cl1
= OMP_CLAUSE_CHAIN (cl1
), cl2
= OMP_CLAUSE_CHAIN (cl2
))
4683 if (OMP_CLAUSE_CODE (cl1
) != OMP_CLAUSE_CODE (cl2
))
4685 if (OMP_CLAUSE_CODE (cl1
) != OMP_CLAUSE_SIMDLEN
)
4687 if (simple_cst_equal (OMP_CLAUSE_DECL (cl1
),
4688 OMP_CLAUSE_DECL (cl2
)) != 1)
4691 switch (OMP_CLAUSE_CODE (cl1
))
4693 case OMP_CLAUSE_ALIGNED
:
4694 if (simple_cst_equal (OMP_CLAUSE_ALIGNED_ALIGNMENT (cl1
),
4695 OMP_CLAUSE_ALIGNED_ALIGNMENT (cl2
)) != 1)
4698 case OMP_CLAUSE_LINEAR
:
4699 if (simple_cst_equal (OMP_CLAUSE_LINEAR_STEP (cl1
),
4700 OMP_CLAUSE_LINEAR_STEP (cl2
)) != 1)
4703 case OMP_CLAUSE_SIMDLEN
:
4704 if (simple_cst_equal (OMP_CLAUSE_SIMDLEN_EXPR (cl1
),
4705 OMP_CLAUSE_SIMDLEN_EXPR (cl2
)) != 1)
4714 /* Compare two constructor-element-type constants. Return 1 if the lists
4715 are known to be equal; otherwise return 0. */
4718 simple_cst_list_equal (const_tree l1
, const_tree l2
)
4720 while (l1
!= NULL_TREE
&& l2
!= NULL_TREE
)
4722 if (simple_cst_equal (TREE_VALUE (l1
), TREE_VALUE (l2
)) != 1)
4725 l1
= TREE_CHAIN (l1
);
4726 l2
= TREE_CHAIN (l2
);
4732 /* Compare two attributes for their value identity. Return true if the
4733 attribute values are known to be equal; otherwise return false.
4737 attribute_value_equal (const_tree attr1
, const_tree attr2
)
4739 if (TREE_VALUE (attr1
) == TREE_VALUE (attr2
))
4742 if (TREE_VALUE (attr1
) != NULL_TREE
4743 && TREE_CODE (TREE_VALUE (attr1
)) == TREE_LIST
4744 && TREE_VALUE (attr2
) != NULL
4745 && TREE_CODE (TREE_VALUE (attr2
)) == TREE_LIST
)
4746 return (simple_cst_list_equal (TREE_VALUE (attr1
),
4747 TREE_VALUE (attr2
)) == 1);
4749 if ((flag_openmp
|| flag_openmp_simd
)
4750 && TREE_VALUE (attr1
) && TREE_VALUE (attr2
)
4751 && TREE_CODE (TREE_VALUE (attr1
)) == OMP_CLAUSE
4752 && TREE_CODE (TREE_VALUE (attr2
)) == OMP_CLAUSE
)
4753 return omp_declare_simd_clauses_equal (TREE_VALUE (attr1
),
4754 TREE_VALUE (attr2
));
4756 return (simple_cst_equal (TREE_VALUE (attr1
), TREE_VALUE (attr2
)) == 1);
4759 /* Return 0 if the attributes for two types are incompatible, 1 if they
4760 are compatible, and 2 if they are nearly compatible (which causes a
4761 warning to be generated). */
4763 comp_type_attributes (const_tree type1
, const_tree type2
)
4765 const_tree a1
= TYPE_ATTRIBUTES (type1
);
4766 const_tree a2
= TYPE_ATTRIBUTES (type2
);
4771 for (a
= a1
; a
!= NULL_TREE
; a
= TREE_CHAIN (a
))
4773 const struct attribute_spec
*as
;
4776 as
= lookup_attribute_spec (get_attribute_name (a
));
4777 if (!as
|| as
->affects_type_identity
== false)
4780 attr
= lookup_attribute (as
->name
, CONST_CAST_TREE (a2
));
4781 if (!attr
|| !attribute_value_equal (a
, attr
))
4786 for (a
= a2
; a
!= NULL_TREE
; a
= TREE_CHAIN (a
))
4788 const struct attribute_spec
*as
;
4790 as
= lookup_attribute_spec (get_attribute_name (a
));
4791 if (!as
|| as
->affects_type_identity
== false)
4794 if (!lookup_attribute (as
->name
, CONST_CAST_TREE (a1
)))
4796 /* We don't need to compare trees again, as we did this
4797 already in first loop. */
4799 /* All types - affecting identity - are equal, so
4800 there is no need to call target hook for comparison. */
4804 /* As some type combinations - like default calling-convention - might
4805 be compatible, we have to call the target hook to get the final result. */
4806 return targetm
.comp_type_attributes (type1
, type2
);
4809 /* Return a type like TTYPE except that its TYPE_ATTRIBUTE
4812 Record such modified types already made so we don't make duplicates. */
4815 build_type_attribute_variant (tree ttype
, tree attribute
)
4817 return build_type_attribute_qual_variant (ttype
, attribute
,
4818 TYPE_QUALS (ttype
));
4822 /* Reset the expression *EXPR_P, a size or position.
4824 ??? We could reset all non-constant sizes or positions. But it's cheap
4825 enough to not do so and refrain from adding workarounds to dwarf2out.c.
4827 We need to reset self-referential sizes or positions because they cannot
4828 be gimplified and thus can contain a CALL_EXPR after the gimplification
4829 is finished, which will run afoul of LTO streaming. And they need to be
4830 reset to something essentially dummy but not constant, so as to preserve
4831 the properties of the object they are attached to. */
4834 free_lang_data_in_one_sizepos (tree
*expr_p
)
4836 tree expr
= *expr_p
;
4837 if (CONTAINS_PLACEHOLDER_P (expr
))
4838 *expr_p
= build0 (PLACEHOLDER_EXPR
, TREE_TYPE (expr
));
4842 /* Reset all the fields in a binfo node BINFO. We only keep
4843 BINFO_VTABLE, which is used by gimple_fold_obj_type_ref. */
4846 free_lang_data_in_binfo (tree binfo
)
4851 gcc_assert (TREE_CODE (binfo
) == TREE_BINFO
);
4853 BINFO_VIRTUALS (binfo
) = NULL_TREE
;
4854 BINFO_BASE_ACCESSES (binfo
) = NULL
;
4855 BINFO_INHERITANCE_CHAIN (binfo
) = NULL_TREE
;
4856 BINFO_SUBVTT_INDEX (binfo
) = NULL_TREE
;
4858 FOR_EACH_VEC_ELT (*BINFO_BASE_BINFOS (binfo
), i
, t
)
4859 free_lang_data_in_binfo (t
);
4863 /* Reset all language specific information still present in TYPE. */
4866 free_lang_data_in_type (tree type
)
4868 gcc_assert (TYPE_P (type
));
4870 /* Give the FE a chance to remove its own data first. */
4871 lang_hooks
.free_lang_data (type
);
4873 TREE_LANG_FLAG_0 (type
) = 0;
4874 TREE_LANG_FLAG_1 (type
) = 0;
4875 TREE_LANG_FLAG_2 (type
) = 0;
4876 TREE_LANG_FLAG_3 (type
) = 0;
4877 TREE_LANG_FLAG_4 (type
) = 0;
4878 TREE_LANG_FLAG_5 (type
) = 0;
4879 TREE_LANG_FLAG_6 (type
) = 0;
4881 if (TREE_CODE (type
) == FUNCTION_TYPE
)
4883 /* Remove the const and volatile qualifiers from arguments. The
4884 C++ front end removes them, but the C front end does not,
4885 leading to false ODR violation errors when merging two
4886 instances of the same function signature compiled by
4887 different front ends. */
4890 for (p
= TYPE_ARG_TYPES (type
); p
; p
= TREE_CHAIN (p
))
4892 tree arg_type
= TREE_VALUE (p
);
4894 if (TYPE_READONLY (arg_type
) || TYPE_VOLATILE (arg_type
))
4896 int quals
= TYPE_QUALS (arg_type
)
4898 & ~TYPE_QUAL_VOLATILE
;
4899 TREE_VALUE (p
) = build_qualified_type (arg_type
, quals
);
4900 free_lang_data_in_type (TREE_VALUE (p
));
4905 /* Remove members that are not actually FIELD_DECLs from the field
4906 list of an aggregate. These occur in C++. */
4907 if (RECORD_OR_UNION_TYPE_P (type
))
4911 /* Note that TYPE_FIELDS can be shared across distinct
4912 TREE_TYPEs. Therefore, if the first field of TYPE_FIELDS is
4913 to be removed, we cannot set its TREE_CHAIN to NULL.
4914 Otherwise, we would not be able to find all the other fields
4915 in the other instances of this TREE_TYPE.
4917 This was causing an ICE in testsuite/g++.dg/lto/20080915.C. */
4919 member
= TYPE_FIELDS (type
);
4922 if (TREE_CODE (member
) == FIELD_DECL
4923 || TREE_CODE (member
) == TYPE_DECL
)
4926 TREE_CHAIN (prev
) = member
;
4928 TYPE_FIELDS (type
) = member
;
4932 member
= TREE_CHAIN (member
);
4936 TREE_CHAIN (prev
) = NULL_TREE
;
4938 TYPE_FIELDS (type
) = NULL_TREE
;
4940 TYPE_METHODS (type
) = NULL_TREE
;
4941 if (TYPE_BINFO (type
))
4942 free_lang_data_in_binfo (TYPE_BINFO (type
));
4946 /* For non-aggregate types, clear out the language slot (which
4947 overloads TYPE_BINFO). */
4948 TYPE_LANG_SLOT_1 (type
) = NULL_TREE
;
4950 if (INTEGRAL_TYPE_P (type
)
4951 || SCALAR_FLOAT_TYPE_P (type
)
4952 || FIXED_POINT_TYPE_P (type
))
4954 free_lang_data_in_one_sizepos (&TYPE_MIN_VALUE (type
));
4955 free_lang_data_in_one_sizepos (&TYPE_MAX_VALUE (type
));
4959 free_lang_data_in_one_sizepos (&TYPE_SIZE (type
));
4960 free_lang_data_in_one_sizepos (&TYPE_SIZE_UNIT (type
));
4962 if (TYPE_CONTEXT (type
)
4963 && TREE_CODE (TYPE_CONTEXT (type
)) == BLOCK
)
4965 tree ctx
= TYPE_CONTEXT (type
);
4968 ctx
= BLOCK_SUPERCONTEXT (ctx
);
4970 while (ctx
&& TREE_CODE (ctx
) == BLOCK
);
4971 TYPE_CONTEXT (type
) = ctx
;
4976 /* Return true if DECL may need an assembler name to be set. */
4979 need_assembler_name_p (tree decl
)
4981 /* Only FUNCTION_DECLs and VAR_DECLs are considered. */
4982 if (TREE_CODE (decl
) != FUNCTION_DECL
4983 && TREE_CODE (decl
) != VAR_DECL
)
4986 /* If DECL already has its assembler name set, it does not need a
4988 if (!HAS_DECL_ASSEMBLER_NAME_P (decl
)
4989 || DECL_ASSEMBLER_NAME_SET_P (decl
))
4992 /* Abstract decls do not need an assembler name. */
4993 if (DECL_ABSTRACT (decl
))
4996 /* For VAR_DECLs, only static, public and external symbols need an
4998 if (TREE_CODE (decl
) == VAR_DECL
4999 && !TREE_STATIC (decl
)
5000 && !TREE_PUBLIC (decl
)
5001 && !DECL_EXTERNAL (decl
))
5004 if (TREE_CODE (decl
) == FUNCTION_DECL
)
5006 /* Do not set assembler name on builtins. Allow RTL expansion to
5007 decide whether to expand inline or via a regular call. */
5008 if (DECL_BUILT_IN (decl
)
5009 && DECL_BUILT_IN_CLASS (decl
) != BUILT_IN_FRONTEND
)
5012 /* Functions represented in the callgraph need an assembler name. */
5013 if (cgraph_node::get (decl
) != NULL
)
5016 /* Unused and not public functions don't need an assembler name. */
5017 if (!TREE_USED (decl
) && !TREE_PUBLIC (decl
))
5025 /* Reset all language specific information still present in symbol
5029 free_lang_data_in_decl (tree decl
)
5031 gcc_assert (DECL_P (decl
));
5033 /* Give the FE a chance to remove its own data first. */
5034 lang_hooks
.free_lang_data (decl
);
5036 TREE_LANG_FLAG_0 (decl
) = 0;
5037 TREE_LANG_FLAG_1 (decl
) = 0;
5038 TREE_LANG_FLAG_2 (decl
) = 0;
5039 TREE_LANG_FLAG_3 (decl
) = 0;
5040 TREE_LANG_FLAG_4 (decl
) = 0;
5041 TREE_LANG_FLAG_5 (decl
) = 0;
5042 TREE_LANG_FLAG_6 (decl
) = 0;
5044 free_lang_data_in_one_sizepos (&DECL_SIZE (decl
));
5045 free_lang_data_in_one_sizepos (&DECL_SIZE_UNIT (decl
));
5046 if (TREE_CODE (decl
) == FIELD_DECL
)
5048 free_lang_data_in_one_sizepos (&DECL_FIELD_OFFSET (decl
));
5049 if (TREE_CODE (DECL_CONTEXT (decl
)) == QUAL_UNION_TYPE
)
5050 DECL_QUALIFIER (decl
) = NULL_TREE
;
5053 if (TREE_CODE (decl
) == FUNCTION_DECL
)
5055 struct cgraph_node
*node
;
5056 if (!(node
= cgraph_node::get (decl
))
5057 || (!node
->definition
&& !node
->clones
))
5060 node
->release_body ();
5063 release_function_body (decl
);
5064 DECL_ARGUMENTS (decl
) = NULL
;
5065 DECL_RESULT (decl
) = NULL
;
5066 DECL_INITIAL (decl
) = error_mark_node
;
5069 if (gimple_has_body_p (decl
))
5073 /* If DECL has a gimple body, then the context for its
5074 arguments must be DECL. Otherwise, it doesn't really
5075 matter, as we will not be emitting any code for DECL. In
5076 general, there may be other instances of DECL created by
5077 the front end and since PARM_DECLs are generally shared,
5078 their DECL_CONTEXT changes as the replicas of DECL are
5079 created. The only time where DECL_CONTEXT is important
5080 is for the FUNCTION_DECLs that have a gimple body (since
5081 the PARM_DECL will be used in the function's body). */
5082 for (t
= DECL_ARGUMENTS (decl
); t
; t
= TREE_CHAIN (t
))
5083 DECL_CONTEXT (t
) = decl
;
5086 /* DECL_SAVED_TREE holds the GENERIC representation for DECL.
5087 At this point, it is not needed anymore. */
5088 DECL_SAVED_TREE (decl
) = NULL_TREE
;
5090 /* Clear the abstract origin if it refers to a method. Otherwise
5091 dwarf2out.c will ICE as we clear TYPE_METHODS and thus the
5092 origin will not be output correctly. */
5093 if (DECL_ABSTRACT_ORIGIN (decl
)
5094 && DECL_CONTEXT (DECL_ABSTRACT_ORIGIN (decl
))
5095 && RECORD_OR_UNION_TYPE_P
5096 (DECL_CONTEXT (DECL_ABSTRACT_ORIGIN (decl
))))
5097 DECL_ABSTRACT_ORIGIN (decl
) = NULL_TREE
;
5099 /* Sometimes the C++ frontend doesn't manage to transform a temporary
5100 DECL_VINDEX referring to itself into a vtable slot number as it
5101 should. Happens with functions that are copied and then forgotten
5102 about. Just clear it, it won't matter anymore. */
5103 if (DECL_VINDEX (decl
) && !tree_fits_shwi_p (DECL_VINDEX (decl
)))
5104 DECL_VINDEX (decl
) = NULL_TREE
;
5106 else if (TREE_CODE (decl
) == VAR_DECL
)
5108 if ((DECL_EXTERNAL (decl
)
5109 && (!TREE_STATIC (decl
) || !TREE_READONLY (decl
)))
5110 || (decl_function_context (decl
) && !TREE_STATIC (decl
)))
5111 DECL_INITIAL (decl
) = NULL_TREE
;
5113 else if (TREE_CODE (decl
) == TYPE_DECL
5114 || TREE_CODE (decl
) == FIELD_DECL
)
5115 DECL_INITIAL (decl
) = NULL_TREE
;
5116 else if (TREE_CODE (decl
) == TRANSLATION_UNIT_DECL
5117 && DECL_INITIAL (decl
)
5118 && TREE_CODE (DECL_INITIAL (decl
)) == BLOCK
)
5120 /* Strip builtins from the translation-unit BLOCK. We still have targets
5121 without builtin_decl_explicit support and also builtins are shared
5122 nodes and thus we can't use TREE_CHAIN in multiple lists. */
5123 tree
*nextp
= &BLOCK_VARS (DECL_INITIAL (decl
));
5127 if (TREE_CODE (var
) == FUNCTION_DECL
5128 && DECL_BUILT_IN (var
))
5129 *nextp
= TREE_CHAIN (var
);
5131 nextp
= &TREE_CHAIN (var
);
5137 /* Data used when collecting DECLs and TYPEs for language data removal. */
5139 struct free_lang_data_d
5141 /* Worklist to avoid excessive recursion. */
5144 /* Set of traversed objects. Used to avoid duplicate visits. */
5145 hash_set
<tree
> *pset
;
5147 /* Array of symbols to process with free_lang_data_in_decl. */
5150 /* Array of types to process with free_lang_data_in_type. */
5155 /* Save all language fields needed to generate proper debug information
5156 for DECL. This saves most fields cleared out by free_lang_data_in_decl. */
5159 save_debug_info_for_decl (tree t
)
5161 /*struct saved_debug_info_d *sdi;*/
5163 gcc_assert (debug_info_level
> DINFO_LEVEL_TERSE
&& t
&& DECL_P (t
));
5165 /* FIXME. Partial implementation for saving debug info removed. */
5169 /* Save all language fields needed to generate proper debug information
5170 for TYPE. This saves most fields cleared out by free_lang_data_in_type. */
5173 save_debug_info_for_type (tree t
)
5175 /*struct saved_debug_info_d *sdi;*/
5177 gcc_assert (debug_info_level
> DINFO_LEVEL_TERSE
&& t
&& TYPE_P (t
));
5179 /* FIXME. Partial implementation for saving debug info removed. */
5183 /* Add type or decl T to one of the list of tree nodes that need their
5184 language data removed. The lists are held inside FLD. */
5187 add_tree_to_fld_list (tree t
, struct free_lang_data_d
*fld
)
5191 fld
->decls
.safe_push (t
);
5192 if (debug_info_level
> DINFO_LEVEL_TERSE
)
5193 save_debug_info_for_decl (t
);
5195 else if (TYPE_P (t
))
5197 fld
->types
.safe_push (t
);
5198 if (debug_info_level
> DINFO_LEVEL_TERSE
)
5199 save_debug_info_for_type (t
);
5205 /* Push tree node T into FLD->WORKLIST. */
5208 fld_worklist_push (tree t
, struct free_lang_data_d
*fld
)
5210 if (t
&& !is_lang_specific (t
) && !fld
->pset
->contains (t
))
5211 fld
->worklist
.safe_push ((t
));
5215 /* Operand callback helper for free_lang_data_in_node. *TP is the
5216 subtree operand being considered. */
5219 find_decls_types_r (tree
*tp
, int *ws
, void *data
)
5222 struct free_lang_data_d
*fld
= (struct free_lang_data_d
*) data
;
5224 if (TREE_CODE (t
) == TREE_LIST
)
5227 /* Language specific nodes will be removed, so there is no need
5228 to gather anything under them. */
5229 if (is_lang_specific (t
))
5237 /* Note that walk_tree does not traverse every possible field in
5238 decls, so we have to do our own traversals here. */
5239 add_tree_to_fld_list (t
, fld
);
5241 fld_worklist_push (DECL_NAME (t
), fld
);
5242 fld_worklist_push (DECL_CONTEXT (t
), fld
);
5243 fld_worklist_push (DECL_SIZE (t
), fld
);
5244 fld_worklist_push (DECL_SIZE_UNIT (t
), fld
);
5246 /* We are going to remove everything under DECL_INITIAL for
5247 TYPE_DECLs. No point walking them. */
5248 if (TREE_CODE (t
) != TYPE_DECL
)
5249 fld_worklist_push (DECL_INITIAL (t
), fld
);
5251 fld_worklist_push (DECL_ATTRIBUTES (t
), fld
);
5252 fld_worklist_push (DECL_ABSTRACT_ORIGIN (t
), fld
);
5254 if (TREE_CODE (t
) == FUNCTION_DECL
)
5256 fld_worklist_push (DECL_ARGUMENTS (t
), fld
);
5257 fld_worklist_push (DECL_RESULT (t
), fld
);
5259 else if (TREE_CODE (t
) == TYPE_DECL
)
5261 fld_worklist_push (DECL_ORIGINAL_TYPE (t
), fld
);
5263 else if (TREE_CODE (t
) == FIELD_DECL
)
5265 fld_worklist_push (DECL_FIELD_OFFSET (t
), fld
);
5266 fld_worklist_push (DECL_BIT_FIELD_TYPE (t
), fld
);
5267 fld_worklist_push (DECL_FIELD_BIT_OFFSET (t
), fld
);
5268 fld_worklist_push (DECL_FCONTEXT (t
), fld
);
5271 if ((TREE_CODE (t
) == VAR_DECL
|| TREE_CODE (t
) == PARM_DECL
)
5272 && DECL_HAS_VALUE_EXPR_P (t
))
5273 fld_worklist_push (DECL_VALUE_EXPR (t
), fld
);
5275 if (TREE_CODE (t
) != FIELD_DECL
5276 && TREE_CODE (t
) != TYPE_DECL
)
5277 fld_worklist_push (TREE_CHAIN (t
), fld
);
5280 else if (TYPE_P (t
))
5282 /* Note that walk_tree does not traverse every possible field in
5283 types, so we have to do our own traversals here. */
5284 add_tree_to_fld_list (t
, fld
);
5286 if (!RECORD_OR_UNION_TYPE_P (t
))
5287 fld_worklist_push (TYPE_CACHED_VALUES (t
), fld
);
5288 fld_worklist_push (TYPE_SIZE (t
), fld
);
5289 fld_worklist_push (TYPE_SIZE_UNIT (t
), fld
);
5290 fld_worklist_push (TYPE_ATTRIBUTES (t
), fld
);
5291 fld_worklist_push (TYPE_POINTER_TO (t
), fld
);
5292 fld_worklist_push (TYPE_REFERENCE_TO (t
), fld
);
5293 fld_worklist_push (TYPE_NAME (t
), fld
);
5294 /* Do not walk TYPE_NEXT_PTR_TO or TYPE_NEXT_REF_TO. We do not stream
5295 them and thus do not and want not to reach unused pointer types
5297 if (!POINTER_TYPE_P (t
))
5298 fld_worklist_push (TYPE_MINVAL (t
), fld
);
5299 if (!RECORD_OR_UNION_TYPE_P (t
))
5300 fld_worklist_push (TYPE_MAXVAL (t
), fld
);
5301 fld_worklist_push (TYPE_MAIN_VARIANT (t
), fld
);
5302 /* Do not walk TYPE_NEXT_VARIANT. We do not stream it and thus
5303 do not and want not to reach unused variants this way. */
5304 if (TYPE_CONTEXT (t
))
5306 tree ctx
= TYPE_CONTEXT (t
);
5307 /* We adjust BLOCK TYPE_CONTEXTs to the innermost non-BLOCK one.
5308 So push that instead. */
5309 while (ctx
&& TREE_CODE (ctx
) == BLOCK
)
5310 ctx
= BLOCK_SUPERCONTEXT (ctx
);
5311 fld_worklist_push (ctx
, fld
);
5313 /* Do not walk TYPE_CANONICAL. We do not stream it and thus do not
5314 and want not to reach unused types this way. */
5316 if (RECORD_OR_UNION_TYPE_P (t
) && TYPE_BINFO (t
))
5320 FOR_EACH_VEC_ELT (*BINFO_BASE_BINFOS (TYPE_BINFO (t
)), i
, tem
)
5321 fld_worklist_push (TREE_TYPE (tem
), fld
);
5322 tem
= BINFO_VIRTUALS (TYPE_BINFO (t
));
5324 /* The Java FE overloads BINFO_VIRTUALS for its own purpose. */
5325 && TREE_CODE (tem
) == TREE_LIST
)
5328 fld_worklist_push (TREE_VALUE (tem
), fld
);
5329 tem
= TREE_CHAIN (tem
);
5333 if (RECORD_OR_UNION_TYPE_P (t
))
5336 /* Push all TYPE_FIELDS - there can be interleaving interesting
5337 and non-interesting things. */
5338 tem
= TYPE_FIELDS (t
);
5341 if (TREE_CODE (tem
) == FIELD_DECL
5342 || TREE_CODE (tem
) == TYPE_DECL
)
5343 fld_worklist_push (tem
, fld
);
5344 tem
= TREE_CHAIN (tem
);
5348 fld_worklist_push (TYPE_STUB_DECL (t
), fld
);
5351 else if (TREE_CODE (t
) == BLOCK
)
5354 for (tem
= BLOCK_VARS (t
); tem
; tem
= TREE_CHAIN (tem
))
5355 fld_worklist_push (tem
, fld
);
5356 for (tem
= BLOCK_SUBBLOCKS (t
); tem
; tem
= BLOCK_CHAIN (tem
))
5357 fld_worklist_push (tem
, fld
);
5358 fld_worklist_push (BLOCK_ABSTRACT_ORIGIN (t
), fld
);
5361 if (TREE_CODE (t
) != IDENTIFIER_NODE
5362 && CODE_CONTAINS_STRUCT (TREE_CODE (t
), TS_TYPED
))
5363 fld_worklist_push (TREE_TYPE (t
), fld
);
5369 /* Find decls and types in T. */
5372 find_decls_types (tree t
, struct free_lang_data_d
*fld
)
5376 if (!fld
->pset
->contains (t
))
5377 walk_tree (&t
, find_decls_types_r
, fld
, fld
->pset
);
5378 if (fld
->worklist
.is_empty ())
5380 t
= fld
->worklist
.pop ();
5384 /* Translate all the types in LIST with the corresponding runtime
5388 get_eh_types_for_runtime (tree list
)
5392 if (list
== NULL_TREE
)
5395 head
= build_tree_list (0, lookup_type_for_runtime (TREE_VALUE (list
)));
5397 list
= TREE_CHAIN (list
);
5400 tree n
= build_tree_list (0, lookup_type_for_runtime (TREE_VALUE (list
)));
5401 TREE_CHAIN (prev
) = n
;
5402 prev
= TREE_CHAIN (prev
);
5403 list
= TREE_CHAIN (list
);
5410 /* Find decls and types referenced in EH region R and store them in
5411 FLD->DECLS and FLD->TYPES. */
5414 find_decls_types_in_eh_region (eh_region r
, struct free_lang_data_d
*fld
)
5425 /* The types referenced in each catch must first be changed to the
5426 EH types used at runtime. This removes references to FE types
5428 for (c
= r
->u
.eh_try
.first_catch
; c
; c
= c
->next_catch
)
5430 c
->type_list
= get_eh_types_for_runtime (c
->type_list
);
5431 walk_tree (&c
->type_list
, find_decls_types_r
, fld
, fld
->pset
);
5436 case ERT_ALLOWED_EXCEPTIONS
:
5437 r
->u
.allowed
.type_list
5438 = get_eh_types_for_runtime (r
->u
.allowed
.type_list
);
5439 walk_tree (&r
->u
.allowed
.type_list
, find_decls_types_r
, fld
, fld
->pset
);
5442 case ERT_MUST_NOT_THROW
:
5443 walk_tree (&r
->u
.must_not_throw
.failure_decl
,
5444 find_decls_types_r
, fld
, fld
->pset
);
5450 /* Find decls and types referenced in cgraph node N and store them in
5451 FLD->DECLS and FLD->TYPES. Unlike pass_referenced_vars, this will
5452 look for *every* kind of DECL and TYPE node reachable from N,
5453 including those embedded inside types and decls (i.e,, TYPE_DECLs,
5454 NAMESPACE_DECLs, etc). */
5457 find_decls_types_in_node (struct cgraph_node
*n
, struct free_lang_data_d
*fld
)
5460 struct function
*fn
;
5464 find_decls_types (n
->decl
, fld
);
5466 if (!gimple_has_body_p (n
->decl
))
5469 gcc_assert (current_function_decl
== NULL_TREE
&& cfun
== NULL
);
5471 fn
= DECL_STRUCT_FUNCTION (n
->decl
);
5473 /* Traverse locals. */
5474 FOR_EACH_LOCAL_DECL (fn
, ix
, t
)
5475 find_decls_types (t
, fld
);
5477 /* Traverse EH regions in FN. */
5480 FOR_ALL_EH_REGION_FN (r
, fn
)
5481 find_decls_types_in_eh_region (r
, fld
);
5484 /* Traverse every statement in FN. */
5485 FOR_EACH_BB_FN (bb
, fn
)
5487 gimple_stmt_iterator si
;
5490 for (si
= gsi_start_phis (bb
); !gsi_end_p (si
); gsi_next (&si
))
5492 gimple phi
= gsi_stmt (si
);
5494 for (i
= 0; i
< gimple_phi_num_args (phi
); i
++)
5496 tree
*arg_p
= gimple_phi_arg_def_ptr (phi
, i
);
5497 find_decls_types (*arg_p
, fld
);
5501 for (si
= gsi_start_bb (bb
); !gsi_end_p (si
); gsi_next (&si
))
5503 gimple stmt
= gsi_stmt (si
);
5505 if (is_gimple_call (stmt
))
5506 find_decls_types (gimple_call_fntype (stmt
), fld
);
5508 for (i
= 0; i
< gimple_num_ops (stmt
); i
++)
5510 tree arg
= gimple_op (stmt
, i
);
5511 find_decls_types (arg
, fld
);
5518 /* Find decls and types referenced in varpool node N and store them in
5519 FLD->DECLS and FLD->TYPES. Unlike pass_referenced_vars, this will
5520 look for *every* kind of DECL and TYPE node reachable from N,
5521 including those embedded inside types and decls (i.e,, TYPE_DECLs,
5522 NAMESPACE_DECLs, etc). */
5525 find_decls_types_in_var (varpool_node
*v
, struct free_lang_data_d
*fld
)
5527 find_decls_types (v
->decl
, fld
);
5530 /* If T needs an assembler name, have one created for it. */
5533 assign_assembler_name_if_neeeded (tree t
)
5535 if (need_assembler_name_p (t
))
5537 /* When setting DECL_ASSEMBLER_NAME, the C++ mangler may emit
5538 diagnostics that use input_location to show locus
5539 information. The problem here is that, at this point,
5540 input_location is generally anchored to the end of the file
5541 (since the parser is long gone), so we don't have a good
5542 position to pin it to.
5544 To alleviate this problem, this uses the location of T's
5545 declaration. Examples of this are
5546 testsuite/g++.dg/template/cond2.C and
5547 testsuite/g++.dg/template/pr35240.C. */
5548 location_t saved_location
= input_location
;
5549 input_location
= DECL_SOURCE_LOCATION (t
);
5551 decl_assembler_name (t
);
5553 input_location
= saved_location
;
5558 /* Free language specific information for every operand and expression
5559 in every node of the call graph. This process operates in three stages:
5561 1- Every callgraph node and varpool node is traversed looking for
5562 decls and types embedded in them. This is a more exhaustive
5563 search than that done by find_referenced_vars, because it will
5564 also collect individual fields, decls embedded in types, etc.
5566 2- All the decls found are sent to free_lang_data_in_decl.
5568 3- All the types found are sent to free_lang_data_in_type.
5570 The ordering between decls and types is important because
5571 free_lang_data_in_decl sets assembler names, which includes
5572 mangling. So types cannot be freed up until assembler names have
5576 free_lang_data_in_cgraph (void)
5578 struct cgraph_node
*n
;
5580 struct free_lang_data_d fld
;
5585 /* Initialize sets and arrays to store referenced decls and types. */
5586 fld
.pset
= new hash_set
<tree
>;
5587 fld
.worklist
.create (0);
5588 fld
.decls
.create (100);
5589 fld
.types
.create (100);
5591 /* Find decls and types in the body of every function in the callgraph. */
5592 FOR_EACH_FUNCTION (n
)
5593 find_decls_types_in_node (n
, &fld
);
5595 FOR_EACH_VEC_SAFE_ELT (alias_pairs
, i
, p
)
5596 find_decls_types (p
->decl
, &fld
);
5598 /* Find decls and types in every varpool symbol. */
5599 FOR_EACH_VARIABLE (v
)
5600 find_decls_types_in_var (v
, &fld
);
5602 /* Set the assembler name on every decl found. We need to do this
5603 now because free_lang_data_in_decl will invalidate data needed
5604 for mangling. This breaks mangling on interdependent decls. */
5605 FOR_EACH_VEC_ELT (fld
.decls
, i
, t
)
5606 assign_assembler_name_if_neeeded (t
);
5608 /* Traverse every decl found freeing its language data. */
5609 FOR_EACH_VEC_ELT (fld
.decls
, i
, t
)
5610 free_lang_data_in_decl (t
);
5612 /* Traverse every type found freeing its language data. */
5613 FOR_EACH_VEC_ELT (fld
.types
, i
, t
)
5614 free_lang_data_in_type (t
);
5617 fld
.worklist
.release ();
5618 fld
.decls
.release ();
5619 fld
.types
.release ();
5623 /* Free resources that are used by FE but are not needed once they are done. */
5626 free_lang_data (void)
5630 /* If we are the LTO frontend we have freed lang-specific data already. */
5632 || !flag_generate_lto
)
5635 /* Allocate and assign alias sets to the standard integer types
5636 while the slots are still in the way the frontends generated them. */
5637 for (i
= 0; i
< itk_none
; ++i
)
5638 if (integer_types
[i
])
5639 TYPE_ALIAS_SET (integer_types
[i
]) = get_alias_set (integer_types
[i
]);
5641 /* Traverse the IL resetting language specific information for
5642 operands, expressions, etc. */
5643 free_lang_data_in_cgraph ();
5645 /* Create gimple variants for common types. */
5646 ptrdiff_type_node
= integer_type_node
;
5647 fileptr_type_node
= ptr_type_node
;
5649 /* Reset some langhooks. Do not reset types_compatible_p, it may
5650 still be used indirectly via the get_alias_set langhook. */
5651 lang_hooks
.dwarf_name
= lhd_dwarf_name
;
5652 lang_hooks
.decl_printable_name
= gimple_decl_printable_name
;
5653 /* We do not want the default decl_assembler_name implementation,
5654 rather if we have fixed everything we want a wrapper around it
5655 asserting that all non-local symbols already got their assembler
5656 name and only produce assembler names for local symbols. Or rather
5657 make sure we never call decl_assembler_name on local symbols and
5658 devise a separate, middle-end private scheme for it. */
5660 /* Reset diagnostic machinery. */
5661 tree_diagnostics_defaults (global_dc
);
5669 const pass_data pass_data_ipa_free_lang_data
=
5671 SIMPLE_IPA_PASS
, /* type */
5672 "*free_lang_data", /* name */
5673 OPTGROUP_NONE
, /* optinfo_flags */
5674 TV_IPA_FREE_LANG_DATA
, /* tv_id */
5675 0, /* properties_required */
5676 0, /* properties_provided */
5677 0, /* properties_destroyed */
5678 0, /* todo_flags_start */
5679 0, /* todo_flags_finish */
5682 class pass_ipa_free_lang_data
: public simple_ipa_opt_pass
5685 pass_ipa_free_lang_data (gcc::context
*ctxt
)
5686 : simple_ipa_opt_pass (pass_data_ipa_free_lang_data
, ctxt
)
5689 /* opt_pass methods: */
5690 virtual unsigned int execute (function
*) { return free_lang_data (); }
5692 }; // class pass_ipa_free_lang_data
5696 simple_ipa_opt_pass
*
5697 make_pass_ipa_free_lang_data (gcc::context
*ctxt
)
5699 return new pass_ipa_free_lang_data (ctxt
);
5702 /* The backbone of is_attribute_p(). ATTR_LEN is the string length of
5703 ATTR_NAME. Also used internally by remove_attribute(). */
5705 private_is_attribute_p (const char *attr_name
, size_t attr_len
, const_tree ident
)
5707 size_t ident_len
= IDENTIFIER_LENGTH (ident
);
5709 if (ident_len
== attr_len
)
5711 if (strcmp (attr_name
, IDENTIFIER_POINTER (ident
)) == 0)
5714 else if (ident_len
== attr_len
+ 4)
5716 /* There is the possibility that ATTR is 'text' and IDENT is
5718 const char *p
= IDENTIFIER_POINTER (ident
);
5719 if (p
[0] == '_' && p
[1] == '_'
5720 && p
[ident_len
- 2] == '_' && p
[ident_len
- 1] == '_'
5721 && strncmp (attr_name
, p
+ 2, attr_len
) == 0)
5728 /* The backbone of lookup_attribute(). ATTR_LEN is the string length
5729 of ATTR_NAME, and LIST is not NULL_TREE. */
5731 private_lookup_attribute (const char *attr_name
, size_t attr_len
, tree list
)
5735 size_t ident_len
= IDENTIFIER_LENGTH (get_attribute_name (list
));
5737 if (ident_len
== attr_len
)
5739 if (!strcmp (attr_name
,
5740 IDENTIFIER_POINTER (get_attribute_name (list
))))
5743 /* TODO: If we made sure that attributes were stored in the
5744 canonical form without '__...__' (ie, as in 'text' as opposed
5745 to '__text__') then we could avoid the following case. */
5746 else if (ident_len
== attr_len
+ 4)
5748 const char *p
= IDENTIFIER_POINTER (get_attribute_name (list
));
5749 if (p
[0] == '_' && p
[1] == '_'
5750 && p
[ident_len
- 2] == '_' && p
[ident_len
- 1] == '_'
5751 && strncmp (attr_name
, p
+ 2, attr_len
) == 0)
5754 list
= TREE_CHAIN (list
);
5760 /* Given an attribute name ATTR_NAME and a list of attributes LIST,
5761 return a pointer to the attribute's list first element if the attribute
5762 starts with ATTR_NAME. ATTR_NAME must be in the form 'text' (not
5766 private_lookup_attribute_by_prefix (const char *attr_name
, size_t attr_len
,
5771 size_t ident_len
= IDENTIFIER_LENGTH (get_attribute_name (list
));
5773 if (attr_len
> ident_len
)
5775 list
= TREE_CHAIN (list
);
5779 const char *p
= IDENTIFIER_POINTER (get_attribute_name (list
));
5781 if (strncmp (attr_name
, p
, attr_len
) == 0)
5784 /* TODO: If we made sure that attributes were stored in the
5785 canonical form without '__...__' (ie, as in 'text' as opposed
5786 to '__text__') then we could avoid the following case. */
5787 if (p
[0] == '_' && p
[1] == '_' &&
5788 strncmp (attr_name
, p
+ 2, attr_len
) == 0)
5791 list
= TREE_CHAIN (list
);
5798 /* A variant of lookup_attribute() that can be used with an identifier
5799 as the first argument, and where the identifier can be either
5800 'text' or '__text__'.
5802 Given an attribute ATTR_IDENTIFIER, and a list of attributes LIST,
5803 return a pointer to the attribute's list element if the attribute
5804 is part of the list, or NULL_TREE if not found. If the attribute
5805 appears more than once, this only returns the first occurrence; the
5806 TREE_CHAIN of the return value should be passed back in if further
5807 occurrences are wanted. ATTR_IDENTIFIER must be an identifier but
5808 can be in the form 'text' or '__text__'. */
5810 lookup_ident_attribute (tree attr_identifier
, tree list
)
5812 gcc_checking_assert (TREE_CODE (attr_identifier
) == IDENTIFIER_NODE
);
5816 gcc_checking_assert (TREE_CODE (get_attribute_name (list
))
5817 == IDENTIFIER_NODE
);
5819 /* Identifiers can be compared directly for equality. */
5820 if (attr_identifier
== get_attribute_name (list
))
5823 /* If they are not equal, they may still be one in the form
5824 'text' while the other one is in the form '__text__'. TODO:
5825 If we were storing attributes in normalized 'text' form, then
5826 this could all go away and we could take full advantage of
5827 the fact that we're comparing identifiers. :-) */
5829 size_t attr_len
= IDENTIFIER_LENGTH (attr_identifier
);
5830 size_t ident_len
= IDENTIFIER_LENGTH (get_attribute_name (list
));
5832 if (ident_len
== attr_len
+ 4)
5834 const char *p
= IDENTIFIER_POINTER (get_attribute_name (list
));
5835 const char *q
= IDENTIFIER_POINTER (attr_identifier
);
5836 if (p
[0] == '_' && p
[1] == '_'
5837 && p
[ident_len
- 2] == '_' && p
[ident_len
- 1] == '_'
5838 && strncmp (q
, p
+ 2, attr_len
) == 0)
5841 else if (ident_len
+ 4 == attr_len
)
5843 const char *p
= IDENTIFIER_POINTER (get_attribute_name (list
));
5844 const char *q
= IDENTIFIER_POINTER (attr_identifier
);
5845 if (q
[0] == '_' && q
[1] == '_'
5846 && q
[attr_len
- 2] == '_' && q
[attr_len
- 1] == '_'
5847 && strncmp (q
+ 2, p
, ident_len
) == 0)
5851 list
= TREE_CHAIN (list
);
5857 /* Remove any instances of attribute ATTR_NAME in LIST and return the
5861 remove_attribute (const char *attr_name
, tree list
)
5864 size_t attr_len
= strlen (attr_name
);
5866 gcc_checking_assert (attr_name
[0] != '_');
5868 for (p
= &list
; *p
; )
5871 /* TODO: If we were storing attributes in normalized form, here
5872 we could use a simple strcmp(). */
5873 if (private_is_attribute_p (attr_name
, attr_len
, get_attribute_name (l
)))
5874 *p
= TREE_CHAIN (l
);
5876 p
= &TREE_CHAIN (l
);
5882 /* Return an attribute list that is the union of a1 and a2. */
5885 merge_attributes (tree a1
, tree a2
)
5889 /* Either one unset? Take the set one. */
5891 if ((attributes
= a1
) == 0)
5894 /* One that completely contains the other? Take it. */
5896 else if (a2
!= 0 && ! attribute_list_contained (a1
, a2
))
5898 if (attribute_list_contained (a2
, a1
))
5902 /* Pick the longest list, and hang on the other list. */
5904 if (list_length (a1
) < list_length (a2
))
5905 attributes
= a2
, a2
= a1
;
5907 for (; a2
!= 0; a2
= TREE_CHAIN (a2
))
5910 for (a
= lookup_ident_attribute (get_attribute_name (a2
),
5912 a
!= NULL_TREE
&& !attribute_value_equal (a
, a2
);
5913 a
= lookup_ident_attribute (get_attribute_name (a2
),
5918 a1
= copy_node (a2
);
5919 TREE_CHAIN (a1
) = attributes
;
5928 /* Given types T1 and T2, merge their attributes and return
5932 merge_type_attributes (tree t1
, tree t2
)
5934 return merge_attributes (TYPE_ATTRIBUTES (t1
),
5935 TYPE_ATTRIBUTES (t2
));
5938 /* Given decls OLDDECL and NEWDECL, merge their attributes and return
5942 merge_decl_attributes (tree olddecl
, tree newdecl
)
5944 return merge_attributes (DECL_ATTRIBUTES (olddecl
),
5945 DECL_ATTRIBUTES (newdecl
));
5948 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
5950 /* Specialization of merge_decl_attributes for various Windows targets.
5952 This handles the following situation:
5954 __declspec (dllimport) int foo;
5957 The second instance of `foo' nullifies the dllimport. */
5960 merge_dllimport_decl_attributes (tree old
, tree new_tree
)
5963 int delete_dllimport_p
= 1;
5965 /* What we need to do here is remove from `old' dllimport if it doesn't
5966 appear in `new'. dllimport behaves like extern: if a declaration is
5967 marked dllimport and a definition appears later, then the object
5968 is not dllimport'd. We also remove a `new' dllimport if the old list
5969 contains dllexport: dllexport always overrides dllimport, regardless
5970 of the order of declaration. */
5971 if (!VAR_OR_FUNCTION_DECL_P (new_tree
))
5972 delete_dllimport_p
= 0;
5973 else if (DECL_DLLIMPORT_P (new_tree
)
5974 && lookup_attribute ("dllexport", DECL_ATTRIBUTES (old
)))
5976 DECL_DLLIMPORT_P (new_tree
) = 0;
5977 warning (OPT_Wattributes
, "%q+D already declared with dllexport attribute: "
5978 "dllimport ignored", new_tree
);
5980 else if (DECL_DLLIMPORT_P (old
) && !DECL_DLLIMPORT_P (new_tree
))
5982 /* Warn about overriding a symbol that has already been used, e.g.:
5983 extern int __attribute__ ((dllimport)) foo;
5984 int* bar () {return &foo;}
5987 if (TREE_USED (old
))
5989 warning (0, "%q+D redeclared without dllimport attribute "
5990 "after being referenced with dll linkage", new_tree
);
5991 /* If we have used a variable's address with dllimport linkage,
5992 keep the old DECL_DLLIMPORT_P flag: the ADDR_EXPR using the
5993 decl may already have had TREE_CONSTANT computed.
5994 We still remove the attribute so that assembler code refers
5995 to '&foo rather than '_imp__foo'. */
5996 if (TREE_CODE (old
) == VAR_DECL
&& TREE_ADDRESSABLE (old
))
5997 DECL_DLLIMPORT_P (new_tree
) = 1;
6000 /* Let an inline definition silently override the external reference,
6001 but otherwise warn about attribute inconsistency. */
6002 else if (TREE_CODE (new_tree
) == VAR_DECL
6003 || !DECL_DECLARED_INLINE_P (new_tree
))
6004 warning (OPT_Wattributes
, "%q+D redeclared without dllimport attribute: "
6005 "previous dllimport ignored", new_tree
);
6008 delete_dllimport_p
= 0;
6010 a
= merge_attributes (DECL_ATTRIBUTES (old
), DECL_ATTRIBUTES (new_tree
));
6012 if (delete_dllimport_p
)
6013 a
= remove_attribute ("dllimport", a
);
6018 /* Handle a "dllimport" or "dllexport" attribute; arguments as in
6019 struct attribute_spec.handler. */
6022 handle_dll_attribute (tree
* pnode
, tree name
, tree args
, int flags
,
6028 /* These attributes may apply to structure and union types being created,
6029 but otherwise should pass to the declaration involved. */
6032 if (flags
& ((int) ATTR_FLAG_DECL_NEXT
| (int) ATTR_FLAG_FUNCTION_NEXT
6033 | (int) ATTR_FLAG_ARRAY_NEXT
))
6035 *no_add_attrs
= true;
6036 return tree_cons (name
, args
, NULL_TREE
);
6038 if (TREE_CODE (node
) == RECORD_TYPE
6039 || TREE_CODE (node
) == UNION_TYPE
)
6041 node
= TYPE_NAME (node
);
6047 warning (OPT_Wattributes
, "%qE attribute ignored",
6049 *no_add_attrs
= true;
6054 if (TREE_CODE (node
) != FUNCTION_DECL
6055 && TREE_CODE (node
) != VAR_DECL
6056 && TREE_CODE (node
) != TYPE_DECL
)
6058 *no_add_attrs
= true;
6059 warning (OPT_Wattributes
, "%qE attribute ignored",
6064 if (TREE_CODE (node
) == TYPE_DECL
6065 && TREE_CODE (TREE_TYPE (node
)) != RECORD_TYPE
6066 && TREE_CODE (TREE_TYPE (node
)) != UNION_TYPE
)
6068 *no_add_attrs
= true;
6069 warning (OPT_Wattributes
, "%qE attribute ignored",
6074 is_dllimport
= is_attribute_p ("dllimport", name
);
6076 /* Report error on dllimport ambiguities seen now before they cause
6080 /* Honor any target-specific overrides. */
6081 if (!targetm
.valid_dllimport_attribute_p (node
))
6082 *no_add_attrs
= true;
6084 else if (TREE_CODE (node
) == FUNCTION_DECL
6085 && DECL_DECLARED_INLINE_P (node
))
6087 warning (OPT_Wattributes
, "inline function %q+D declared as "
6088 " dllimport: attribute ignored", node
);
6089 *no_add_attrs
= true;
6091 /* Like MS, treat definition of dllimported variables and
6092 non-inlined functions on declaration as syntax errors. */
6093 else if (TREE_CODE (node
) == FUNCTION_DECL
&& DECL_INITIAL (node
))
6095 error ("function %q+D definition is marked dllimport", node
);
6096 *no_add_attrs
= true;
6099 else if (TREE_CODE (node
) == VAR_DECL
)
6101 if (DECL_INITIAL (node
))
6103 error ("variable %q+D definition is marked dllimport",
6105 *no_add_attrs
= true;
6108 /* `extern' needn't be specified with dllimport.
6109 Specify `extern' now and hope for the best. Sigh. */
6110 DECL_EXTERNAL (node
) = 1;
6111 /* Also, implicitly give dllimport'd variables declared within
6112 a function global scope, unless declared static. */
6113 if (current_function_decl
!= NULL_TREE
&& !TREE_STATIC (node
))
6114 TREE_PUBLIC (node
) = 1;
6117 if (*no_add_attrs
== false)
6118 DECL_DLLIMPORT_P (node
) = 1;
6120 else if (TREE_CODE (node
) == FUNCTION_DECL
6121 && DECL_DECLARED_INLINE_P (node
)
6122 && flag_keep_inline_dllexport
)
6123 /* An exported function, even if inline, must be emitted. */
6124 DECL_EXTERNAL (node
) = 0;
6126 /* Report error if symbol is not accessible at global scope. */
6127 if (!TREE_PUBLIC (node
)
6128 && (TREE_CODE (node
) == VAR_DECL
6129 || TREE_CODE (node
) == FUNCTION_DECL
))
6131 error ("external linkage required for symbol %q+D because of "
6132 "%qE attribute", node
, name
);
6133 *no_add_attrs
= true;
6136 /* A dllexport'd entity must have default visibility so that other
6137 program units (shared libraries or the main executable) can see
6138 it. A dllimport'd entity must have default visibility so that
6139 the linker knows that undefined references within this program
6140 unit can be resolved by the dynamic linker. */
6143 if (DECL_VISIBILITY_SPECIFIED (node
)
6144 && DECL_VISIBILITY (node
) != VISIBILITY_DEFAULT
)
6145 error ("%qE implies default visibility, but %qD has already "
6146 "been declared with a different visibility",
6148 DECL_VISIBILITY (node
) = VISIBILITY_DEFAULT
;
6149 DECL_VISIBILITY_SPECIFIED (node
) = 1;
6155 #endif /* TARGET_DLLIMPORT_DECL_ATTRIBUTES */
6157 /* Set the type qualifiers for TYPE to TYPE_QUALS, which is a bitmask
6158 of the various TYPE_QUAL values. */
6161 set_type_quals (tree type
, int type_quals
)
6163 TYPE_READONLY (type
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
6164 TYPE_VOLATILE (type
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
6165 TYPE_RESTRICT (type
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
6166 TYPE_ATOMIC (type
) = (type_quals
& TYPE_QUAL_ATOMIC
) != 0;
6167 TYPE_ADDR_SPACE (type
) = DECODE_QUAL_ADDR_SPACE (type_quals
);
6170 /* Returns true iff CAND is equivalent to BASE with TYPE_QUALS. */
6173 check_qualified_type (const_tree cand
, const_tree base
, int type_quals
)
6175 return (TYPE_QUALS (cand
) == type_quals
6176 && TYPE_NAME (cand
) == TYPE_NAME (base
)
6177 /* Apparently this is needed for Objective-C. */
6178 && TYPE_CONTEXT (cand
) == TYPE_CONTEXT (base
)
6179 /* Check alignment. */
6180 && TYPE_ALIGN (cand
) == TYPE_ALIGN (base
)
6181 && attribute_list_equal (TYPE_ATTRIBUTES (cand
),
6182 TYPE_ATTRIBUTES (base
)));
6185 /* Returns true iff CAND is equivalent to BASE with ALIGN. */
6188 check_aligned_type (const_tree cand
, const_tree base
, unsigned int align
)
6190 return (TYPE_QUALS (cand
) == TYPE_QUALS (base
)
6191 && TYPE_NAME (cand
) == TYPE_NAME (base
)
6192 /* Apparently this is needed for Objective-C. */
6193 && TYPE_CONTEXT (cand
) == TYPE_CONTEXT (base
)
6194 /* Check alignment. */
6195 && TYPE_ALIGN (cand
) == align
6196 && attribute_list_equal (TYPE_ATTRIBUTES (cand
),
6197 TYPE_ATTRIBUTES (base
)));
6200 /* This function checks to see if TYPE matches the size one of the built-in
6201 atomic types, and returns that core atomic type. */
6204 find_atomic_core_type (tree type
)
6206 tree base_atomic_type
;
6208 /* Only handle complete types. */
6209 if (TYPE_SIZE (type
) == NULL_TREE
)
6212 HOST_WIDE_INT type_size
= tree_to_uhwi (TYPE_SIZE (type
));
6216 base_atomic_type
= atomicQI_type_node
;
6220 base_atomic_type
= atomicHI_type_node
;
6224 base_atomic_type
= atomicSI_type_node
;
6228 base_atomic_type
= atomicDI_type_node
;
6232 base_atomic_type
= atomicTI_type_node
;
6236 base_atomic_type
= NULL_TREE
;
6239 return base_atomic_type
;
6242 /* Return a version of the TYPE, qualified as indicated by the
6243 TYPE_QUALS, if one exists. If no qualified version exists yet,
6244 return NULL_TREE. */
6247 get_qualified_type (tree type
, int type_quals
)
6251 if (TYPE_QUALS (type
) == type_quals
)
6254 /* Search the chain of variants to see if there is already one there just
6255 like the one we need to have. If so, use that existing one. We must
6256 preserve the TYPE_NAME, since there is code that depends on this. */
6257 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
6258 if (check_qualified_type (t
, type
, type_quals
))
6264 /* Like get_qualified_type, but creates the type if it does not
6265 exist. This function never returns NULL_TREE. */
6268 build_qualified_type (tree type
, int type_quals
)
6272 /* See if we already have the appropriate qualified variant. */
6273 t
= get_qualified_type (type
, type_quals
);
6275 /* If not, build it. */
6278 t
= build_variant_type_copy (type
);
6279 set_type_quals (t
, type_quals
);
6281 if (((type_quals
& TYPE_QUAL_ATOMIC
) == TYPE_QUAL_ATOMIC
))
6283 /* See if this object can map to a basic atomic type. */
6284 tree atomic_type
= find_atomic_core_type (type
);
6287 /* Ensure the alignment of this type is compatible with
6288 the required alignment of the atomic type. */
6289 if (TYPE_ALIGN (atomic_type
) > TYPE_ALIGN (t
))
6290 TYPE_ALIGN (t
) = TYPE_ALIGN (atomic_type
);
6294 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
6295 /* Propagate structural equality. */
6296 SET_TYPE_STRUCTURAL_EQUALITY (t
);
6297 else if (TYPE_CANONICAL (type
) != type
)
6298 /* Build the underlying canonical type, since it is different
6301 tree c
= build_qualified_type (TYPE_CANONICAL (type
), type_quals
);
6302 TYPE_CANONICAL (t
) = TYPE_CANONICAL (c
);
6305 /* T is its own canonical type. */
6306 TYPE_CANONICAL (t
) = t
;
6313 /* Create a variant of type T with alignment ALIGN. */
6316 build_aligned_type (tree type
, unsigned int align
)
6320 if (TYPE_PACKED (type
)
6321 || TYPE_ALIGN (type
) == align
)
6324 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
6325 if (check_aligned_type (t
, type
, align
))
6328 t
= build_variant_type_copy (type
);
6329 TYPE_ALIGN (t
) = align
;
6334 /* Create a new distinct copy of TYPE. The new type is made its own
6335 MAIN_VARIANT. If TYPE requires structural equality checks, the
6336 resulting type requires structural equality checks; otherwise, its
6337 TYPE_CANONICAL points to itself. */
6340 build_distinct_type_copy (tree type
)
6342 tree t
= copy_node (type
);
6344 TYPE_POINTER_TO (t
) = 0;
6345 TYPE_REFERENCE_TO (t
) = 0;
6347 /* Set the canonical type either to a new equivalence class, or
6348 propagate the need for structural equality checks. */
6349 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
6350 SET_TYPE_STRUCTURAL_EQUALITY (t
);
6352 TYPE_CANONICAL (t
) = t
;
6354 /* Make it its own variant. */
6355 TYPE_MAIN_VARIANT (t
) = t
;
6356 TYPE_NEXT_VARIANT (t
) = 0;
6358 /* Note that it is now possible for TYPE_MIN_VALUE to be a value
6359 whose TREE_TYPE is not t. This can also happen in the Ada
6360 frontend when using subtypes. */
6365 /* Create a new variant of TYPE, equivalent but distinct. This is so
6366 the caller can modify it. TYPE_CANONICAL for the return type will
6367 be equivalent to TYPE_CANONICAL of TYPE, indicating that the types
6368 are considered equal by the language itself (or that both types
6369 require structural equality checks). */
6372 build_variant_type_copy (tree type
)
6374 tree t
, m
= TYPE_MAIN_VARIANT (type
);
6376 t
= build_distinct_type_copy (type
);
6378 /* Since we're building a variant, assume that it is a non-semantic
6379 variant. This also propagates TYPE_STRUCTURAL_EQUALITY_P. */
6380 TYPE_CANONICAL (t
) = TYPE_CANONICAL (type
);
6382 /* Add the new type to the chain of variants of TYPE. */
6383 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (m
);
6384 TYPE_NEXT_VARIANT (m
) = t
;
6385 TYPE_MAIN_VARIANT (t
) = m
;
6390 /* Return true if the from tree in both tree maps are equal. */
6393 tree_map_base_eq (const void *va
, const void *vb
)
6395 const struct tree_map_base
*const a
= (const struct tree_map_base
*) va
,
6396 *const b
= (const struct tree_map_base
*) vb
;
6397 return (a
->from
== b
->from
);
6400 /* Hash a from tree in a tree_base_map. */
6403 tree_map_base_hash (const void *item
)
6405 return htab_hash_pointer (((const struct tree_map_base
*)item
)->from
);
6408 /* Return true if this tree map structure is marked for garbage collection
6409 purposes. We simply return true if the from tree is marked, so that this
6410 structure goes away when the from tree goes away. */
6413 tree_map_base_marked_p (const void *p
)
6415 return ggc_marked_p (((const struct tree_map_base
*) p
)->from
);
6418 /* Hash a from tree in a tree_map. */
6421 tree_map_hash (const void *item
)
6423 return (((const struct tree_map
*) item
)->hash
);
6426 /* Hash a from tree in a tree_decl_map. */
6429 tree_decl_map_hash (const void *item
)
6431 return DECL_UID (((const struct tree_decl_map
*) item
)->base
.from
);
6434 /* Return the initialization priority for DECL. */
6437 decl_init_priority_lookup (tree decl
)
6439 symtab_node
*snode
= symtab_node::get (decl
);
6442 return DEFAULT_INIT_PRIORITY
;
6444 snode
->get_init_priority ();
6447 /* Return the finalization priority for DECL. */
6450 decl_fini_priority_lookup (tree decl
)
6452 cgraph_node
*node
= cgraph_node::get (decl
);
6455 return DEFAULT_INIT_PRIORITY
;
6457 node
->get_fini_priority ();
6460 /* Set the initialization priority for DECL to PRIORITY. */
6463 decl_init_priority_insert (tree decl
, priority_type priority
)
6465 struct symtab_node
*snode
;
6467 if (priority
== DEFAULT_INIT_PRIORITY
)
6469 snode
= symtab_node::get (decl
);
6473 else if (TREE_CODE (decl
) == VAR_DECL
)
6474 snode
= varpool_node::get_create (decl
);
6476 snode
= cgraph_node::get_create (decl
);
6477 snode
->set_init_priority (priority
);
6480 /* Set the finalization priority for DECL to PRIORITY. */
6483 decl_fini_priority_insert (tree decl
, priority_type priority
)
6485 struct cgraph_node
*node
;
6487 if (priority
== DEFAULT_INIT_PRIORITY
)
6489 node
= cgraph_node::get (decl
);
6494 node
= cgraph_node::get_create (decl
);
6495 node
->set_fini_priority (priority
);
6498 /* Print out the statistics for the DECL_DEBUG_EXPR hash table. */
6501 print_debug_expr_statistics (void)
6503 fprintf (stderr
, "DECL_DEBUG_EXPR hash: size %ld, %ld elements, %f collisions\n",
6504 (long) htab_size (debug_expr_for_decl
),
6505 (long) htab_elements (debug_expr_for_decl
),
6506 htab_collisions (debug_expr_for_decl
));
6509 /* Print out the statistics for the DECL_VALUE_EXPR hash table. */
6512 print_value_expr_statistics (void)
6514 fprintf (stderr
, "DECL_VALUE_EXPR hash: size %ld, %ld elements, %f collisions\n",
6515 (long) htab_size (value_expr_for_decl
),
6516 (long) htab_elements (value_expr_for_decl
),
6517 htab_collisions (value_expr_for_decl
));
6520 /* Lookup a debug expression for FROM, and return it if we find one. */
6523 decl_debug_expr_lookup (tree from
)
6525 struct tree_decl_map
*h
, in
;
6526 in
.base
.from
= from
;
6528 h
= (struct tree_decl_map
*)
6529 htab_find_with_hash (debug_expr_for_decl
, &in
, DECL_UID (from
));
6535 /* Insert a mapping FROM->TO in the debug expression hashtable. */
6538 decl_debug_expr_insert (tree from
, tree to
)
6540 struct tree_decl_map
*h
;
6543 h
= ggc_alloc
<tree_decl_map
> ();
6544 h
->base
.from
= from
;
6546 loc
= htab_find_slot_with_hash (debug_expr_for_decl
, h
, DECL_UID (from
),
6548 *(struct tree_decl_map
**) loc
= h
;
6551 /* Lookup a value expression for FROM, and return it if we find one. */
6554 decl_value_expr_lookup (tree from
)
6556 struct tree_decl_map
*h
, in
;
6557 in
.base
.from
= from
;
6559 h
= (struct tree_decl_map
*)
6560 htab_find_with_hash (value_expr_for_decl
, &in
, DECL_UID (from
));
6566 /* Insert a mapping FROM->TO in the value expression hashtable. */
6569 decl_value_expr_insert (tree from
, tree to
)
6571 struct tree_decl_map
*h
;
6574 h
= ggc_alloc
<tree_decl_map
> ();
6575 h
->base
.from
= from
;
6577 loc
= htab_find_slot_with_hash (value_expr_for_decl
, h
, DECL_UID (from
),
6579 *(struct tree_decl_map
**) loc
= h
;
6582 /* Lookup a vector of debug arguments for FROM, and return it if we
6586 decl_debug_args_lookup (tree from
)
6588 struct tree_vec_map
*h
, in
;
6590 if (!DECL_HAS_DEBUG_ARGS_P (from
))
6592 gcc_checking_assert (debug_args_for_decl
!= NULL
);
6593 in
.base
.from
= from
;
6594 h
= (struct tree_vec_map
*)
6595 htab_find_with_hash (debug_args_for_decl
, &in
, DECL_UID (from
));
6601 /* Insert a mapping FROM->empty vector of debug arguments in the value
6602 expression hashtable. */
6605 decl_debug_args_insert (tree from
)
6607 struct tree_vec_map
*h
;
6610 if (DECL_HAS_DEBUG_ARGS_P (from
))
6611 return decl_debug_args_lookup (from
);
6612 if (debug_args_for_decl
== NULL
)
6613 debug_args_for_decl
= htab_create_ggc (64, tree_vec_map_hash
,
6614 tree_vec_map_eq
, 0);
6615 h
= ggc_alloc
<tree_vec_map
> ();
6616 h
->base
.from
= from
;
6618 loc
= htab_find_slot_with_hash (debug_args_for_decl
, h
, DECL_UID (from
),
6620 *(struct tree_vec_map
**) loc
= h
;
6621 DECL_HAS_DEBUG_ARGS_P (from
) = 1;
6625 /* Hashing of types so that we don't make duplicates.
6626 The entry point is `type_hash_canon'. */
6628 /* Compute a hash code for a list of types (chain of TREE_LIST nodes
6629 with types in the TREE_VALUE slots), by adding the hash codes
6630 of the individual types. */
6633 type_hash_list (const_tree list
, inchash::hash
&hstate
)
6637 for (tail
= list
; tail
; tail
= TREE_CHAIN (tail
))
6638 if (TREE_VALUE (tail
) != error_mark_node
)
6639 hstate
.add_object (TYPE_HASH (TREE_VALUE (tail
)));
6642 /* These are the Hashtable callback functions. */
6644 /* Returns true iff the types are equivalent. */
6647 type_hash_eq (const void *va
, const void *vb
)
6649 const struct type_hash
*const a
= (const struct type_hash
*) va
,
6650 *const b
= (const struct type_hash
*) vb
;
6652 /* First test the things that are the same for all types. */
6653 if (a
->hash
!= b
->hash
6654 || TREE_CODE (a
->type
) != TREE_CODE (b
->type
)
6655 || TREE_TYPE (a
->type
) != TREE_TYPE (b
->type
)
6656 || !attribute_list_equal (TYPE_ATTRIBUTES (a
->type
),
6657 TYPE_ATTRIBUTES (b
->type
))
6658 || (TREE_CODE (a
->type
) != COMPLEX_TYPE
6659 && TYPE_NAME (a
->type
) != TYPE_NAME (b
->type
)))
6662 /* Be careful about comparing arrays before and after the element type
6663 has been completed; don't compare TYPE_ALIGN unless both types are
6665 if (COMPLETE_TYPE_P (a
->type
) && COMPLETE_TYPE_P (b
->type
)
6666 && (TYPE_ALIGN (a
->type
) != TYPE_ALIGN (b
->type
)
6667 || TYPE_MODE (a
->type
) != TYPE_MODE (b
->type
)))
6670 switch (TREE_CODE (a
->type
))
6675 case REFERENCE_TYPE
:
6680 return TYPE_VECTOR_SUBPARTS (a
->type
) == TYPE_VECTOR_SUBPARTS (b
->type
);
6683 if (TYPE_VALUES (a
->type
) != TYPE_VALUES (b
->type
)
6684 && !(TYPE_VALUES (a
->type
)
6685 && TREE_CODE (TYPE_VALUES (a
->type
)) == TREE_LIST
6686 && TYPE_VALUES (b
->type
)
6687 && TREE_CODE (TYPE_VALUES (b
->type
)) == TREE_LIST
6688 && type_list_equal (TYPE_VALUES (a
->type
),
6689 TYPE_VALUES (b
->type
))))
6692 /* ... fall through ... */
6697 if (TYPE_PRECISION (a
->type
) != TYPE_PRECISION (b
->type
))
6699 return ((TYPE_MAX_VALUE (a
->type
) == TYPE_MAX_VALUE (b
->type
)
6700 || tree_int_cst_equal (TYPE_MAX_VALUE (a
->type
),
6701 TYPE_MAX_VALUE (b
->type
)))
6702 && (TYPE_MIN_VALUE (a
->type
) == TYPE_MIN_VALUE (b
->type
)
6703 || tree_int_cst_equal (TYPE_MIN_VALUE (a
->type
),
6704 TYPE_MIN_VALUE (b
->type
))));
6706 case FIXED_POINT_TYPE
:
6707 return TYPE_SATURATING (a
->type
) == TYPE_SATURATING (b
->type
);
6710 return TYPE_OFFSET_BASETYPE (a
->type
) == TYPE_OFFSET_BASETYPE (b
->type
);
6713 if (TYPE_METHOD_BASETYPE (a
->type
) == TYPE_METHOD_BASETYPE (b
->type
)
6714 && (TYPE_ARG_TYPES (a
->type
) == TYPE_ARG_TYPES (b
->type
)
6715 || (TYPE_ARG_TYPES (a
->type
)
6716 && TREE_CODE (TYPE_ARG_TYPES (a
->type
)) == TREE_LIST
6717 && TYPE_ARG_TYPES (b
->type
)
6718 && TREE_CODE (TYPE_ARG_TYPES (b
->type
)) == TREE_LIST
6719 && type_list_equal (TYPE_ARG_TYPES (a
->type
),
6720 TYPE_ARG_TYPES (b
->type
)))))
6724 return TYPE_DOMAIN (a
->type
) == TYPE_DOMAIN (b
->type
);
6728 case QUAL_UNION_TYPE
:
6729 return (TYPE_FIELDS (a
->type
) == TYPE_FIELDS (b
->type
)
6730 || (TYPE_FIELDS (a
->type
)
6731 && TREE_CODE (TYPE_FIELDS (a
->type
)) == TREE_LIST
6732 && TYPE_FIELDS (b
->type
)
6733 && TREE_CODE (TYPE_FIELDS (b
->type
)) == TREE_LIST
6734 && type_list_equal (TYPE_FIELDS (a
->type
),
6735 TYPE_FIELDS (b
->type
))));
6738 if (TYPE_ARG_TYPES (a
->type
) == TYPE_ARG_TYPES (b
->type
)
6739 || (TYPE_ARG_TYPES (a
->type
)
6740 && TREE_CODE (TYPE_ARG_TYPES (a
->type
)) == TREE_LIST
6741 && TYPE_ARG_TYPES (b
->type
)
6742 && TREE_CODE (TYPE_ARG_TYPES (b
->type
)) == TREE_LIST
6743 && type_list_equal (TYPE_ARG_TYPES (a
->type
),
6744 TYPE_ARG_TYPES (b
->type
))))
6752 if (lang_hooks
.types
.type_hash_eq
!= NULL
)
6753 return lang_hooks
.types
.type_hash_eq (a
->type
, b
->type
);
6758 /* Return the cached hash value. */
6761 type_hash_hash (const void *item
)
6763 return ((const struct type_hash
*) item
)->hash
;
6766 /* Given TYPE, and HASHCODE its hash code, return the canonical
6767 object for an identical type if one already exists.
6768 Otherwise, return TYPE, and record it as the canonical object.
6770 To use this function, first create a type of the sort you want.
6771 Then compute its hash code from the fields of the type that
6772 make it different from other similar types.
6773 Then call this function and use the value. */
6776 type_hash_canon (unsigned int hashcode
, tree type
)
6781 /* The hash table only contains main variants, so ensure that's what we're
6783 gcc_assert (TYPE_MAIN_VARIANT (type
) == type
);
6785 /* The TYPE_ALIGN field of a type is set by layout_type(), so we
6786 must call that routine before comparing TYPE_ALIGNs. */
6792 loc
= htab_find_slot_with_hash (type_hash_table
, &in
, hashcode
, INSERT
);
6795 tree t1
= ((type_hash
*) *loc
)->type
;
6796 gcc_assert (TYPE_MAIN_VARIANT (t1
) == t1
);
6797 if (GATHER_STATISTICS
)
6799 tree_code_counts
[(int) TREE_CODE (type
)]--;
6800 tree_node_counts
[(int) t_kind
]--;
6801 tree_node_sizes
[(int) t_kind
] -= sizeof (struct tree_type_non_common
);
6807 struct type_hash
*h
;
6809 h
= ggc_alloc
<type_hash
> ();
6818 /* See if the data pointed to by the type hash table is marked. We consider
6819 it marked if the type is marked or if a debug type number or symbol
6820 table entry has been made for the type. */
6823 type_hash_marked_p (const void *p
)
6825 const_tree
const type
= ((const struct type_hash
*) p
)->type
;
6827 return ggc_marked_p (type
);
6831 print_type_hash_statistics (void)
6833 fprintf (stderr
, "Type hash: size %ld, %ld elements, %f collisions\n",
6834 (long) htab_size (type_hash_table
),
6835 (long) htab_elements (type_hash_table
),
6836 htab_collisions (type_hash_table
));
6839 /* Compute a hash code for a list of attributes (chain of TREE_LIST nodes
6840 with names in the TREE_PURPOSE slots and args in the TREE_VALUE slots),
6841 by adding the hash codes of the individual attributes. */
6844 attribute_hash_list (const_tree list
, inchash::hash
&hstate
)
6848 for (tail
= list
; tail
; tail
= TREE_CHAIN (tail
))
6849 /* ??? Do we want to add in TREE_VALUE too? */
6850 hstate
.add_object (IDENTIFIER_HASH_VALUE (get_attribute_name (tail
)));
6853 /* Given two lists of attributes, return true if list l2 is
6854 equivalent to l1. */
6857 attribute_list_equal (const_tree l1
, const_tree l2
)
6862 return attribute_list_contained (l1
, l2
)
6863 && attribute_list_contained (l2
, l1
);
6866 /* Given two lists of attributes, return true if list L2 is
6867 completely contained within L1. */
6868 /* ??? This would be faster if attribute names were stored in a canonicalized
6869 form. Otherwise, if L1 uses `foo' and L2 uses `__foo__', the long method
6870 must be used to show these elements are equivalent (which they are). */
6871 /* ??? It's not clear that attributes with arguments will always be handled
6875 attribute_list_contained (const_tree l1
, const_tree l2
)
6879 /* First check the obvious, maybe the lists are identical. */
6883 /* Maybe the lists are similar. */
6884 for (t1
= l1
, t2
= l2
;
6886 && get_attribute_name (t1
) == get_attribute_name (t2
)
6887 && TREE_VALUE (t1
) == TREE_VALUE (t2
);
6888 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
6891 /* Maybe the lists are equal. */
6892 if (t1
== 0 && t2
== 0)
6895 for (; t2
!= 0; t2
= TREE_CHAIN (t2
))
6898 /* This CONST_CAST is okay because lookup_attribute does not
6899 modify its argument and the return value is assigned to a
6901 for (attr
= lookup_ident_attribute (get_attribute_name (t2
),
6902 CONST_CAST_TREE (l1
));
6903 attr
!= NULL_TREE
&& !attribute_value_equal (t2
, attr
);
6904 attr
= lookup_ident_attribute (get_attribute_name (t2
),
6908 if (attr
== NULL_TREE
)
6915 /* Given two lists of types
6916 (chains of TREE_LIST nodes with types in the TREE_VALUE slots)
6917 return 1 if the lists contain the same types in the same order.
6918 Also, the TREE_PURPOSEs must match. */
6921 type_list_equal (const_tree l1
, const_tree l2
)
6925 for (t1
= l1
, t2
= l2
; t1
&& t2
; t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
6926 if (TREE_VALUE (t1
) != TREE_VALUE (t2
)
6927 || (TREE_PURPOSE (t1
) != TREE_PURPOSE (t2
)
6928 && ! (1 == simple_cst_equal (TREE_PURPOSE (t1
), TREE_PURPOSE (t2
))
6929 && (TREE_TYPE (TREE_PURPOSE (t1
))
6930 == TREE_TYPE (TREE_PURPOSE (t2
))))))
6936 /* Returns the number of arguments to the FUNCTION_TYPE or METHOD_TYPE
6937 given by TYPE. If the argument list accepts variable arguments,
6938 then this function counts only the ordinary arguments. */
6941 type_num_arguments (const_tree type
)
6946 for (t
= TYPE_ARG_TYPES (type
); t
; t
= TREE_CHAIN (t
))
6947 /* If the function does not take a variable number of arguments,
6948 the last element in the list will have type `void'. */
6949 if (VOID_TYPE_P (TREE_VALUE (t
)))
6957 /* Nonzero if integer constants T1 and T2
6958 represent the same constant value. */
6961 tree_int_cst_equal (const_tree t1
, const_tree t2
)
6966 if (t1
== 0 || t2
== 0)
6969 if (TREE_CODE (t1
) == INTEGER_CST
6970 && TREE_CODE (t2
) == INTEGER_CST
6971 && wi::to_widest (t1
) == wi::to_widest (t2
))
6977 /* Return true if T is an INTEGER_CST whose numerical value (extended
6978 according to TYPE_UNSIGNED) fits in a signed HOST_WIDE_INT. */
6981 tree_fits_shwi_p (const_tree t
)
6983 return (t
!= NULL_TREE
6984 && TREE_CODE (t
) == INTEGER_CST
6985 && wi::fits_shwi_p (wi::to_widest (t
)));
6988 /* Return true if T is an INTEGER_CST whose numerical value (extended
6989 according to TYPE_UNSIGNED) fits in an unsigned HOST_WIDE_INT. */
6992 tree_fits_uhwi_p (const_tree t
)
6994 return (t
!= NULL_TREE
6995 && TREE_CODE (t
) == INTEGER_CST
6996 && wi::fits_uhwi_p (wi::to_widest (t
)));
6999 /* T is an INTEGER_CST whose numerical value (extended according to
7000 TYPE_UNSIGNED) fits in a signed HOST_WIDE_INT. Return that
7004 tree_to_shwi (const_tree t
)
7006 gcc_assert (tree_fits_shwi_p (t
));
7007 return TREE_INT_CST_LOW (t
);
7010 /* T is an INTEGER_CST whose numerical value (extended according to
7011 TYPE_UNSIGNED) fits in an unsigned HOST_WIDE_INT. Return that
7014 unsigned HOST_WIDE_INT
7015 tree_to_uhwi (const_tree t
)
7017 gcc_assert (tree_fits_uhwi_p (t
));
7018 return TREE_INT_CST_LOW (t
);
7021 /* Return the most significant (sign) bit of T. */
7024 tree_int_cst_sign_bit (const_tree t
)
7026 unsigned bitno
= TYPE_PRECISION (TREE_TYPE (t
)) - 1;
7028 return wi::extract_uhwi (t
, bitno
, 1);
7031 /* Return an indication of the sign of the integer constant T.
7032 The return value is -1 if T < 0, 0 if T == 0, and 1 if T > 0.
7033 Note that -1 will never be returned if T's type is unsigned. */
7036 tree_int_cst_sgn (const_tree t
)
7038 if (wi::eq_p (t
, 0))
7040 else if (TYPE_UNSIGNED (TREE_TYPE (t
)))
7042 else if (wi::neg_p (t
))
7048 /* Return the minimum number of bits needed to represent VALUE in a
7049 signed or unsigned type, UNSIGNEDP says which. */
7052 tree_int_cst_min_precision (tree value
, signop sgn
)
7054 /* If the value is negative, compute its negative minus 1. The latter
7055 adjustment is because the absolute value of the largest negative value
7056 is one larger than the largest positive value. This is equivalent to
7057 a bit-wise negation, so use that operation instead. */
7059 if (tree_int_cst_sgn (value
) < 0)
7060 value
= fold_build1 (BIT_NOT_EXPR
, TREE_TYPE (value
), value
);
7062 /* Return the number of bits needed, taking into account the fact
7063 that we need one more bit for a signed than unsigned type.
7064 If value is 0 or -1, the minimum precision is 1 no matter
7065 whether unsignedp is true or false. */
7067 if (integer_zerop (value
))
7070 return tree_floor_log2 (value
) + 1 + (sgn
== SIGNED
? 1 : 0) ;
7073 /* Return truthvalue of whether T1 is the same tree structure as T2.
7074 Return 1 if they are the same.
7075 Return 0 if they are understandably different.
7076 Return -1 if either contains tree structure not understood by
7080 simple_cst_equal (const_tree t1
, const_tree t2
)
7082 enum tree_code code1
, code2
;
7088 if (t1
== 0 || t2
== 0)
7091 code1
= TREE_CODE (t1
);
7092 code2
= TREE_CODE (t2
);
7094 if (CONVERT_EXPR_CODE_P (code1
) || code1
== NON_LVALUE_EXPR
)
7096 if (CONVERT_EXPR_CODE_P (code2
)
7097 || code2
== NON_LVALUE_EXPR
)
7098 return simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
7100 return simple_cst_equal (TREE_OPERAND (t1
, 0), t2
);
7103 else if (CONVERT_EXPR_CODE_P (code2
)
7104 || code2
== NON_LVALUE_EXPR
)
7105 return simple_cst_equal (t1
, TREE_OPERAND (t2
, 0));
7113 return wi::to_widest (t1
) == wi::to_widest (t2
);
7116 return REAL_VALUES_IDENTICAL (TREE_REAL_CST (t1
), TREE_REAL_CST (t2
));
7119 return FIXED_VALUES_IDENTICAL (TREE_FIXED_CST (t1
), TREE_FIXED_CST (t2
));
7122 return (TREE_STRING_LENGTH (t1
) == TREE_STRING_LENGTH (t2
)
7123 && ! memcmp (TREE_STRING_POINTER (t1
), TREE_STRING_POINTER (t2
),
7124 TREE_STRING_LENGTH (t1
)));
7128 unsigned HOST_WIDE_INT idx
;
7129 vec
<constructor_elt
, va_gc
> *v1
= CONSTRUCTOR_ELTS (t1
);
7130 vec
<constructor_elt
, va_gc
> *v2
= CONSTRUCTOR_ELTS (t2
);
7132 if (vec_safe_length (v1
) != vec_safe_length (v2
))
7135 for (idx
= 0; idx
< vec_safe_length (v1
); ++idx
)
7136 /* ??? Should we handle also fields here? */
7137 if (!simple_cst_equal ((*v1
)[idx
].value
, (*v2
)[idx
].value
))
7143 return simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
7146 cmp
= simple_cst_equal (CALL_EXPR_FN (t1
), CALL_EXPR_FN (t2
));
7149 if (call_expr_nargs (t1
) != call_expr_nargs (t2
))
7152 const_tree arg1
, arg2
;
7153 const_call_expr_arg_iterator iter1
, iter2
;
7154 for (arg1
= first_const_call_expr_arg (t1
, &iter1
),
7155 arg2
= first_const_call_expr_arg (t2
, &iter2
);
7157 arg1
= next_const_call_expr_arg (&iter1
),
7158 arg2
= next_const_call_expr_arg (&iter2
))
7160 cmp
= simple_cst_equal (arg1
, arg2
);
7164 return arg1
== arg2
;
7168 /* Special case: if either target is an unallocated VAR_DECL,
7169 it means that it's going to be unified with whatever the
7170 TARGET_EXPR is really supposed to initialize, so treat it
7171 as being equivalent to anything. */
7172 if ((TREE_CODE (TREE_OPERAND (t1
, 0)) == VAR_DECL
7173 && DECL_NAME (TREE_OPERAND (t1
, 0)) == NULL_TREE
7174 && !DECL_RTL_SET_P (TREE_OPERAND (t1
, 0)))
7175 || (TREE_CODE (TREE_OPERAND (t2
, 0)) == VAR_DECL
7176 && DECL_NAME (TREE_OPERAND (t2
, 0)) == NULL_TREE
7177 && !DECL_RTL_SET_P (TREE_OPERAND (t2
, 0))))
7180 cmp
= simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
7185 return simple_cst_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t2
, 1));
7187 case WITH_CLEANUP_EXPR
:
7188 cmp
= simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
7192 return simple_cst_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t1
, 1));
7195 if (TREE_OPERAND (t1
, 1) == TREE_OPERAND (t2
, 1))
7196 return simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
7210 /* This general rule works for most tree codes. All exceptions should be
7211 handled above. If this is a language-specific tree code, we can't
7212 trust what might be in the operand, so say we don't know
7214 if ((int) code1
>= (int) LAST_AND_UNUSED_TREE_CODE
)
7217 switch (TREE_CODE_CLASS (code1
))
7221 case tcc_comparison
:
7222 case tcc_expression
:
7226 for (i
= 0; i
< TREE_CODE_LENGTH (code1
); i
++)
7228 cmp
= simple_cst_equal (TREE_OPERAND (t1
, i
), TREE_OPERAND (t2
, i
));
7240 /* Compare the value of T, an INTEGER_CST, with U, an unsigned integer value.
7241 Return -1, 0, or 1 if the value of T is less than, equal to, or greater
7242 than U, respectively. */
7245 compare_tree_int (const_tree t
, unsigned HOST_WIDE_INT u
)
7247 if (tree_int_cst_sgn (t
) < 0)
7249 else if (!tree_fits_uhwi_p (t
))
7251 else if (TREE_INT_CST_LOW (t
) == u
)
7253 else if (TREE_INT_CST_LOW (t
) < u
)
7259 /* Return true if SIZE represents a constant size that is in bounds of
7260 what the middle-end and the backend accepts (covering not more than
7261 half of the address-space). */
7264 valid_constant_size_p (const_tree size
)
7266 if (! tree_fits_uhwi_p (size
)
7267 || TREE_OVERFLOW (size
)
7268 || tree_int_cst_sign_bit (size
) != 0)
7273 /* Return the precision of the type, or for a complex or vector type the
7274 precision of the type of its elements. */
7277 element_precision (const_tree type
)
7279 enum tree_code code
= TREE_CODE (type
);
7280 if (code
== COMPLEX_TYPE
|| code
== VECTOR_TYPE
)
7281 type
= TREE_TYPE (type
);
7283 return TYPE_PRECISION (type
);
7286 /* Return true if CODE represents an associative tree code. Otherwise
7289 associative_tree_code (enum tree_code code
)
7308 /* Return true if CODE represents a commutative tree code. Otherwise
7311 commutative_tree_code (enum tree_code code
)
7317 case MULT_HIGHPART_EXPR
:
7325 case UNORDERED_EXPR
:
7329 case TRUTH_AND_EXPR
:
7330 case TRUTH_XOR_EXPR
:
7332 case WIDEN_MULT_EXPR
:
7333 case VEC_WIDEN_MULT_HI_EXPR
:
7334 case VEC_WIDEN_MULT_LO_EXPR
:
7335 case VEC_WIDEN_MULT_EVEN_EXPR
:
7336 case VEC_WIDEN_MULT_ODD_EXPR
:
7345 /* Return true if CODE represents a ternary tree code for which the
7346 first two operands are commutative. Otherwise return false. */
7348 commutative_ternary_tree_code (enum tree_code code
)
7352 case WIDEN_MULT_PLUS_EXPR
:
7353 case WIDEN_MULT_MINUS_EXPR
:
7365 /* Generate a hash value for an expression. This can be used iteratively
7366 by passing a previous result as the HSTATE argument.
7368 This function is intended to produce the same hash for expressions which
7369 would compare equal using operand_equal_p. */
7371 add_expr (const_tree t
, inchash::hash
&hstate
)
7374 enum tree_code code
;
7375 enum tree_code_class tclass
;
7379 hstate
.merge_hash (0);
7383 code
= TREE_CODE (t
);
7387 /* Alas, constants aren't shared, so we can't rely on pointer
7390 hstate
.merge_hash (0);
7393 for (i
= 0; i
< TREE_INT_CST_NUNITS (t
); i
++)
7394 hstate
.add_wide_int (TREE_INT_CST_ELT (t
, i
));
7398 unsigned int val2
= real_hash (TREE_REAL_CST_PTR (t
));
7399 hstate
.merge_hash (val2
);
7404 unsigned int val2
= fixed_hash (TREE_FIXED_CST_PTR (t
));
7405 hstate
.merge_hash (val2
);
7409 hstate
.add ((const void *) TREE_STRING_POINTER (t
), TREE_STRING_LENGTH (t
));
7412 inchash::add_expr (TREE_REALPART (t
), hstate
);
7413 inchash::add_expr (TREE_IMAGPART (t
), hstate
);
7418 for (i
= 0; i
< VECTOR_CST_NELTS (t
); ++i
)
7419 inchash::add_expr (VECTOR_CST_ELT (t
, i
), hstate
);
7423 /* We can just compare by pointer. */
7424 hstate
.add_wide_int (SSA_NAME_VERSION (t
));
7426 case PLACEHOLDER_EXPR
:
7427 /* The node itself doesn't matter. */
7430 /* A list of expressions, for a CALL_EXPR or as the elements of a
7432 for (; t
; t
= TREE_CHAIN (t
))
7433 inchash::add_expr (TREE_VALUE (t
), hstate
);
7437 unsigned HOST_WIDE_INT idx
;
7439 FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (t
), idx
, field
, value
)
7441 inchash::add_expr (field
, hstate
);
7442 inchash::add_expr (value
, hstate
);
7447 /* When referring to a built-in FUNCTION_DECL, use the __builtin__ form.
7448 Otherwise nodes that compare equal according to operand_equal_p might
7449 get different hash codes. However, don't do this for machine specific
7450 or front end builtins, since the function code is overloaded in those
7452 if (DECL_BUILT_IN_CLASS (t
) == BUILT_IN_NORMAL
7453 && builtin_decl_explicit_p (DECL_FUNCTION_CODE (t
)))
7455 t
= builtin_decl_explicit (DECL_FUNCTION_CODE (t
));
7456 code
= TREE_CODE (t
);
7460 tclass
= TREE_CODE_CLASS (code
);
7462 if (tclass
== tcc_declaration
)
7464 /* DECL's have a unique ID */
7465 hstate
.add_wide_int (DECL_UID (t
));
7469 gcc_assert (IS_EXPR_CODE_CLASS (tclass
));
7471 hstate
.add_object (code
);
7473 /* Don't hash the type, that can lead to having nodes which
7474 compare equal according to operand_equal_p, but which
7475 have different hash codes. */
7476 if (CONVERT_EXPR_CODE_P (code
)
7477 || code
== NON_LVALUE_EXPR
)
7479 /* Make sure to include signness in the hash computation. */
7480 hstate
.add_int (TYPE_UNSIGNED (TREE_TYPE (t
)));
7481 inchash::add_expr (TREE_OPERAND (t
, 0), hstate
);
7484 else if (commutative_tree_code (code
))
7486 /* It's a commutative expression. We want to hash it the same
7487 however it appears. We do this by first hashing both operands
7488 and then rehashing based on the order of their independent
7490 inchash::hash one
, two
;
7491 inchash::add_expr (TREE_OPERAND (t
, 0), one
);
7492 inchash::add_expr (TREE_OPERAND (t
, 1), two
);
7493 hstate
.add_commutative (one
, two
);
7496 for (i
= TREE_OPERAND_LENGTH (t
) - 1; i
>= 0; --i
)
7497 inchash::add_expr (TREE_OPERAND (t
, i
), hstate
);
7505 /* Constructors for pointer, array and function types.
7506 (RECORD_TYPE, UNION_TYPE and ENUMERAL_TYPE nodes are
7507 constructed by language-dependent code, not here.) */
7509 /* Construct, lay out and return the type of pointers to TO_TYPE with
7510 mode MODE. If CAN_ALIAS_ALL is TRUE, indicate this type can
7511 reference all of memory. If such a type has already been
7512 constructed, reuse it. */
7515 build_pointer_type_for_mode (tree to_type
, enum machine_mode mode
,
7520 if (to_type
== error_mark_node
)
7521 return error_mark_node
;
7523 /* If the pointed-to type has the may_alias attribute set, force
7524 a TYPE_REF_CAN_ALIAS_ALL pointer to be generated. */
7525 if (lookup_attribute ("may_alias", TYPE_ATTRIBUTES (to_type
)))
7526 can_alias_all
= true;
7528 /* In some cases, languages will have things that aren't a POINTER_TYPE
7529 (such as a RECORD_TYPE for fat pointers in Ada) as TYPE_POINTER_TO.
7530 In that case, return that type without regard to the rest of our
7533 ??? This is a kludge, but consistent with the way this function has
7534 always operated and there doesn't seem to be a good way to avoid this
7536 if (TYPE_POINTER_TO (to_type
) != 0
7537 && TREE_CODE (TYPE_POINTER_TO (to_type
)) != POINTER_TYPE
)
7538 return TYPE_POINTER_TO (to_type
);
7540 /* First, if we already have a type for pointers to TO_TYPE and it's
7541 the proper mode, use it. */
7542 for (t
= TYPE_POINTER_TO (to_type
); t
; t
= TYPE_NEXT_PTR_TO (t
))
7543 if (TYPE_MODE (t
) == mode
&& TYPE_REF_CAN_ALIAS_ALL (t
) == can_alias_all
)
7546 t
= make_node (POINTER_TYPE
);
7548 TREE_TYPE (t
) = to_type
;
7549 SET_TYPE_MODE (t
, mode
);
7550 TYPE_REF_CAN_ALIAS_ALL (t
) = can_alias_all
;
7551 TYPE_NEXT_PTR_TO (t
) = TYPE_POINTER_TO (to_type
);
7552 TYPE_POINTER_TO (to_type
) = t
;
7554 if (TYPE_STRUCTURAL_EQUALITY_P (to_type
))
7555 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7556 else if (TYPE_CANONICAL (to_type
) != to_type
)
7558 = build_pointer_type_for_mode (TYPE_CANONICAL (to_type
),
7559 mode
, can_alias_all
);
7561 /* Lay out the type. This function has many callers that are concerned
7562 with expression-construction, and this simplifies them all. */
7568 /* By default build pointers in ptr_mode. */
7571 build_pointer_type (tree to_type
)
7573 addr_space_t as
= to_type
== error_mark_node
? ADDR_SPACE_GENERIC
7574 : TYPE_ADDR_SPACE (to_type
);
7575 enum machine_mode pointer_mode
= targetm
.addr_space
.pointer_mode (as
);
7576 return build_pointer_type_for_mode (to_type
, pointer_mode
, false);
7579 /* Same as build_pointer_type_for_mode, but for REFERENCE_TYPE. */
7582 build_reference_type_for_mode (tree to_type
, enum machine_mode mode
,
7587 if (to_type
== error_mark_node
)
7588 return error_mark_node
;
7590 /* If the pointed-to type has the may_alias attribute set, force
7591 a TYPE_REF_CAN_ALIAS_ALL pointer to be generated. */
7592 if (lookup_attribute ("may_alias", TYPE_ATTRIBUTES (to_type
)))
7593 can_alias_all
= true;
7595 /* In some cases, languages will have things that aren't a REFERENCE_TYPE
7596 (such as a RECORD_TYPE for fat pointers in Ada) as TYPE_REFERENCE_TO.
7597 In that case, return that type without regard to the rest of our
7600 ??? This is a kludge, but consistent with the way this function has
7601 always operated and there doesn't seem to be a good way to avoid this
7603 if (TYPE_REFERENCE_TO (to_type
) != 0
7604 && TREE_CODE (TYPE_REFERENCE_TO (to_type
)) != REFERENCE_TYPE
)
7605 return TYPE_REFERENCE_TO (to_type
);
7607 /* First, if we already have a type for pointers to TO_TYPE and it's
7608 the proper mode, use it. */
7609 for (t
= TYPE_REFERENCE_TO (to_type
); t
; t
= TYPE_NEXT_REF_TO (t
))
7610 if (TYPE_MODE (t
) == mode
&& TYPE_REF_CAN_ALIAS_ALL (t
) == can_alias_all
)
7613 t
= make_node (REFERENCE_TYPE
);
7615 TREE_TYPE (t
) = to_type
;
7616 SET_TYPE_MODE (t
, mode
);
7617 TYPE_REF_CAN_ALIAS_ALL (t
) = can_alias_all
;
7618 TYPE_NEXT_REF_TO (t
) = TYPE_REFERENCE_TO (to_type
);
7619 TYPE_REFERENCE_TO (to_type
) = t
;
7621 if (TYPE_STRUCTURAL_EQUALITY_P (to_type
))
7622 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7623 else if (TYPE_CANONICAL (to_type
) != to_type
)
7625 = build_reference_type_for_mode (TYPE_CANONICAL (to_type
),
7626 mode
, can_alias_all
);
7634 /* Build the node for the type of references-to-TO_TYPE by default
7638 build_reference_type (tree to_type
)
7640 addr_space_t as
= to_type
== error_mark_node
? ADDR_SPACE_GENERIC
7641 : TYPE_ADDR_SPACE (to_type
);
7642 enum machine_mode pointer_mode
= targetm
.addr_space
.pointer_mode (as
);
7643 return build_reference_type_for_mode (to_type
, pointer_mode
, false);
7646 #define MAX_INT_CACHED_PREC \
7647 (HOST_BITS_PER_WIDE_INT > 64 ? HOST_BITS_PER_WIDE_INT : 64)
7648 static GTY(()) tree nonstandard_integer_type_cache
[2 * MAX_INT_CACHED_PREC
+ 2];
7650 /* Builds a signed or unsigned integer type of precision PRECISION.
7651 Used for C bitfields whose precision does not match that of
7652 built-in target types. */
7654 build_nonstandard_integer_type (unsigned HOST_WIDE_INT precision
,
7660 unsignedp
= MAX_INT_CACHED_PREC
+ 1;
7662 if (precision
<= MAX_INT_CACHED_PREC
)
7664 itype
= nonstandard_integer_type_cache
[precision
+ unsignedp
];
7669 itype
= make_node (INTEGER_TYPE
);
7670 TYPE_PRECISION (itype
) = precision
;
7673 fixup_unsigned_type (itype
);
7675 fixup_signed_type (itype
);
7678 if (tree_fits_uhwi_p (TYPE_MAX_VALUE (itype
)))
7679 ret
= type_hash_canon (tree_to_uhwi (TYPE_MAX_VALUE (itype
)), itype
);
7680 if (precision
<= MAX_INT_CACHED_PREC
)
7681 nonstandard_integer_type_cache
[precision
+ unsignedp
] = ret
;
7686 /* Create a range of some discrete type TYPE (an INTEGER_TYPE, ENUMERAL_TYPE
7687 or BOOLEAN_TYPE) with low bound LOWVAL and high bound HIGHVAL. If SHARED
7688 is true, reuse such a type that has already been constructed. */
7691 build_range_type_1 (tree type
, tree lowval
, tree highval
, bool shared
)
7693 tree itype
= make_node (INTEGER_TYPE
);
7694 inchash::hash hstate
;
7696 TREE_TYPE (itype
) = type
;
7698 TYPE_MIN_VALUE (itype
) = fold_convert (type
, lowval
);
7699 TYPE_MAX_VALUE (itype
) = highval
? fold_convert (type
, highval
) : NULL
;
7701 TYPE_PRECISION (itype
) = TYPE_PRECISION (type
);
7702 SET_TYPE_MODE (itype
, TYPE_MODE (type
));
7703 TYPE_SIZE (itype
) = TYPE_SIZE (type
);
7704 TYPE_SIZE_UNIT (itype
) = TYPE_SIZE_UNIT (type
);
7705 TYPE_ALIGN (itype
) = TYPE_ALIGN (type
);
7706 TYPE_USER_ALIGN (itype
) = TYPE_USER_ALIGN (type
);
7711 if ((TYPE_MIN_VALUE (itype
)
7712 && TREE_CODE (TYPE_MIN_VALUE (itype
)) != INTEGER_CST
)
7713 || (TYPE_MAX_VALUE (itype
)
7714 && TREE_CODE (TYPE_MAX_VALUE (itype
)) != INTEGER_CST
))
7716 /* Since we cannot reliably merge this type, we need to compare it using
7717 structural equality checks. */
7718 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
7722 inchash::add_expr (TYPE_MIN_VALUE (itype
), hstate
);
7723 inchash::add_expr (TYPE_MAX_VALUE (itype
), hstate
);
7724 hstate
.merge_hash (TYPE_HASH (type
));
7725 itype
= type_hash_canon (hstate
.end (), itype
);
7730 /* Wrapper around build_range_type_1 with SHARED set to true. */
7733 build_range_type (tree type
, tree lowval
, tree highval
)
7735 return build_range_type_1 (type
, lowval
, highval
, true);
7738 /* Wrapper around build_range_type_1 with SHARED set to false. */
7741 build_nonshared_range_type (tree type
, tree lowval
, tree highval
)
7743 return build_range_type_1 (type
, lowval
, highval
, false);
7746 /* Create a type of integers to be the TYPE_DOMAIN of an ARRAY_TYPE.
7747 MAXVAL should be the maximum value in the domain
7748 (one less than the length of the array).
7750 The maximum value that MAXVAL can have is INT_MAX for a HOST_WIDE_INT.
7751 We don't enforce this limit, that is up to caller (e.g. language front end).
7752 The limit exists because the result is a signed type and we don't handle
7753 sizes that use more than one HOST_WIDE_INT. */
7756 build_index_type (tree maxval
)
7758 return build_range_type (sizetype
, size_zero_node
, maxval
);
7761 /* Return true if the debug information for TYPE, a subtype, should be emitted
7762 as a subrange type. If so, set LOWVAL to the low bound and HIGHVAL to the
7763 high bound, respectively. Sometimes doing so unnecessarily obfuscates the
7764 debug info and doesn't reflect the source code. */
7767 subrange_type_for_debug_p (const_tree type
, tree
*lowval
, tree
*highval
)
7769 tree base_type
= TREE_TYPE (type
), low
, high
;
7771 /* Subrange types have a base type which is an integral type. */
7772 if (!INTEGRAL_TYPE_P (base_type
))
7775 /* Get the real bounds of the subtype. */
7776 if (lang_hooks
.types
.get_subrange_bounds
)
7777 lang_hooks
.types
.get_subrange_bounds (type
, &low
, &high
);
7780 low
= TYPE_MIN_VALUE (type
);
7781 high
= TYPE_MAX_VALUE (type
);
7784 /* If the type and its base type have the same representation and the same
7785 name, then the type is not a subrange but a copy of the base type. */
7786 if ((TREE_CODE (base_type
) == INTEGER_TYPE
7787 || TREE_CODE (base_type
) == BOOLEAN_TYPE
)
7788 && int_size_in_bytes (type
) == int_size_in_bytes (base_type
)
7789 && tree_int_cst_equal (low
, TYPE_MIN_VALUE (base_type
))
7790 && tree_int_cst_equal (high
, TYPE_MAX_VALUE (base_type
))
7791 && TYPE_IDENTIFIER (type
) == TYPE_IDENTIFIER (base_type
))
7801 /* Construct, lay out and return the type of arrays of elements with ELT_TYPE
7802 and number of elements specified by the range of values of INDEX_TYPE.
7803 If SHARED is true, reuse such a type that has already been constructed. */
7806 build_array_type_1 (tree elt_type
, tree index_type
, bool shared
)
7810 if (TREE_CODE (elt_type
) == FUNCTION_TYPE
)
7812 error ("arrays of functions are not meaningful");
7813 elt_type
= integer_type_node
;
7816 t
= make_node (ARRAY_TYPE
);
7817 TREE_TYPE (t
) = elt_type
;
7818 TYPE_DOMAIN (t
) = index_type
;
7819 TYPE_ADDR_SPACE (t
) = TYPE_ADDR_SPACE (elt_type
);
7822 /* If the element type is incomplete at this point we get marked for
7823 structural equality. Do not record these types in the canonical
7825 if (TYPE_STRUCTURAL_EQUALITY_P (t
))
7830 inchash::hash hstate
;
7831 hstate
.add_object (TYPE_HASH (elt_type
));
7833 hstate
.add_object (TYPE_HASH (index_type
));
7834 t
= type_hash_canon (hstate
.end (), t
);
7837 if (TYPE_CANONICAL (t
) == t
)
7839 if (TYPE_STRUCTURAL_EQUALITY_P (elt_type
)
7840 || (index_type
&& TYPE_STRUCTURAL_EQUALITY_P (index_type
)))
7841 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7842 else if (TYPE_CANONICAL (elt_type
) != elt_type
7843 || (index_type
&& TYPE_CANONICAL (index_type
) != index_type
))
7845 = build_array_type_1 (TYPE_CANONICAL (elt_type
),
7847 ? TYPE_CANONICAL (index_type
) : NULL_TREE
,
7854 /* Wrapper around build_array_type_1 with SHARED set to true. */
7857 build_array_type (tree elt_type
, tree index_type
)
7859 return build_array_type_1 (elt_type
, index_type
, true);
7862 /* Wrapper around build_array_type_1 with SHARED set to false. */
7865 build_nonshared_array_type (tree elt_type
, tree index_type
)
7867 return build_array_type_1 (elt_type
, index_type
, false);
7870 /* Return a representation of ELT_TYPE[NELTS], using indices of type
7874 build_array_type_nelts (tree elt_type
, unsigned HOST_WIDE_INT nelts
)
7876 return build_array_type (elt_type
, build_index_type (size_int (nelts
- 1)));
7879 /* Recursively examines the array elements of TYPE, until a non-array
7880 element type is found. */
7883 strip_array_types (tree type
)
7885 while (TREE_CODE (type
) == ARRAY_TYPE
)
7886 type
= TREE_TYPE (type
);
7891 /* Computes the canonical argument types from the argument type list
7894 Upon return, *ANY_STRUCTURAL_P will be true iff either it was true
7895 on entry to this function, or if any of the ARGTYPES are
7898 Upon return, *ANY_NONCANONICAL_P will be true iff either it was
7899 true on entry to this function, or if any of the ARGTYPES are
7902 Returns a canonical argument list, which may be ARGTYPES when the
7903 canonical argument list is unneeded (i.e., *ANY_STRUCTURAL_P is
7904 true) or would not differ from ARGTYPES. */
7907 maybe_canonicalize_argtypes (tree argtypes
,
7908 bool *any_structural_p
,
7909 bool *any_noncanonical_p
)
7912 bool any_noncanonical_argtypes_p
= false;
7914 for (arg
= argtypes
; arg
&& !(*any_structural_p
); arg
= TREE_CHAIN (arg
))
7916 if (!TREE_VALUE (arg
) || TREE_VALUE (arg
) == error_mark_node
)
7917 /* Fail gracefully by stating that the type is structural. */
7918 *any_structural_p
= true;
7919 else if (TYPE_STRUCTURAL_EQUALITY_P (TREE_VALUE (arg
)))
7920 *any_structural_p
= true;
7921 else if (TYPE_CANONICAL (TREE_VALUE (arg
)) != TREE_VALUE (arg
)
7922 || TREE_PURPOSE (arg
))
7923 /* If the argument has a default argument, we consider it
7924 non-canonical even though the type itself is canonical.
7925 That way, different variants of function and method types
7926 with default arguments will all point to the variant with
7927 no defaults as their canonical type. */
7928 any_noncanonical_argtypes_p
= true;
7931 if (*any_structural_p
)
7934 if (any_noncanonical_argtypes_p
)
7936 /* Build the canonical list of argument types. */
7937 tree canon_argtypes
= NULL_TREE
;
7938 bool is_void
= false;
7940 for (arg
= argtypes
; arg
; arg
= TREE_CHAIN (arg
))
7942 if (arg
== void_list_node
)
7945 canon_argtypes
= tree_cons (NULL_TREE
,
7946 TYPE_CANONICAL (TREE_VALUE (arg
)),
7950 canon_argtypes
= nreverse (canon_argtypes
);
7952 canon_argtypes
= chainon (canon_argtypes
, void_list_node
);
7954 /* There is a non-canonical type. */
7955 *any_noncanonical_p
= true;
7956 return canon_argtypes
;
7959 /* The canonical argument types are the same as ARGTYPES. */
7963 /* Construct, lay out and return
7964 the type of functions returning type VALUE_TYPE
7965 given arguments of types ARG_TYPES.
7966 ARG_TYPES is a chain of TREE_LIST nodes whose TREE_VALUEs
7967 are data type nodes for the arguments of the function.
7968 If such a type has already been constructed, reuse it. */
7971 build_function_type (tree value_type
, tree arg_types
)
7974 inchash::hash hstate
;
7975 bool any_structural_p
, any_noncanonical_p
;
7976 tree canon_argtypes
;
7978 if (TREE_CODE (value_type
) == FUNCTION_TYPE
)
7980 error ("function return type cannot be function");
7981 value_type
= integer_type_node
;
7984 /* Make a node of the sort we want. */
7985 t
= make_node (FUNCTION_TYPE
);
7986 TREE_TYPE (t
) = value_type
;
7987 TYPE_ARG_TYPES (t
) = arg_types
;
7989 /* If we already have such a type, use the old one. */
7990 hstate
.add_object (TYPE_HASH (value_type
));
7991 type_hash_list (arg_types
, hstate
);
7992 t
= type_hash_canon (hstate
.end (), t
);
7994 /* Set up the canonical type. */
7995 any_structural_p
= TYPE_STRUCTURAL_EQUALITY_P (value_type
);
7996 any_noncanonical_p
= TYPE_CANONICAL (value_type
) != value_type
;
7997 canon_argtypes
= maybe_canonicalize_argtypes (arg_types
,
7999 &any_noncanonical_p
);
8000 if (any_structural_p
)
8001 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8002 else if (any_noncanonical_p
)
8003 TYPE_CANONICAL (t
) = build_function_type (TYPE_CANONICAL (value_type
),
8006 if (!COMPLETE_TYPE_P (t
))
8011 /* Build a function type. The RETURN_TYPE is the type returned by the
8012 function. If VAARGS is set, no void_type_node is appended to the
8013 the list. ARGP must be always be terminated be a NULL_TREE. */
8016 build_function_type_list_1 (bool vaargs
, tree return_type
, va_list argp
)
8020 t
= va_arg (argp
, tree
);
8021 for (args
= NULL_TREE
; t
!= NULL_TREE
; t
= va_arg (argp
, tree
))
8022 args
= tree_cons (NULL_TREE
, t
, args
);
8027 if (args
!= NULL_TREE
)
8028 args
= nreverse (args
);
8029 gcc_assert (last
!= void_list_node
);
8031 else if (args
== NULL_TREE
)
8032 args
= void_list_node
;
8036 args
= nreverse (args
);
8037 TREE_CHAIN (last
) = void_list_node
;
8039 args
= build_function_type (return_type
, args
);
8044 /* Build a function type. The RETURN_TYPE is the type returned by the
8045 function. If additional arguments are provided, they are
8046 additional argument types. The list of argument types must always
8047 be terminated by NULL_TREE. */
8050 build_function_type_list (tree return_type
, ...)
8055 va_start (p
, return_type
);
8056 args
= build_function_type_list_1 (false, return_type
, p
);
8061 /* Build a variable argument function type. The RETURN_TYPE is the
8062 type returned by the function. If additional arguments are provided,
8063 they are additional argument types. The list of argument types must
8064 always be terminated by NULL_TREE. */
8067 build_varargs_function_type_list (tree return_type
, ...)
8072 va_start (p
, return_type
);
8073 args
= build_function_type_list_1 (true, return_type
, p
);
8079 /* Build a function type. RETURN_TYPE is the type returned by the
8080 function; VAARGS indicates whether the function takes varargs. The
8081 function takes N named arguments, the types of which are provided in
8085 build_function_type_array_1 (bool vaargs
, tree return_type
, int n
,
8089 tree t
= vaargs
? NULL_TREE
: void_list_node
;
8091 for (i
= n
- 1; i
>= 0; i
--)
8092 t
= tree_cons (NULL_TREE
, arg_types
[i
], t
);
8094 return build_function_type (return_type
, t
);
8097 /* Build a function type. RETURN_TYPE is the type returned by the
8098 function. The function takes N named arguments, the types of which
8099 are provided in ARG_TYPES. */
8102 build_function_type_array (tree return_type
, int n
, tree
*arg_types
)
8104 return build_function_type_array_1 (false, return_type
, n
, arg_types
);
8107 /* Build a variable argument function type. RETURN_TYPE is the type
8108 returned by the function. The function takes N named arguments, the
8109 types of which are provided in ARG_TYPES. */
8112 build_varargs_function_type_array (tree return_type
, int n
, tree
*arg_types
)
8114 return build_function_type_array_1 (true, return_type
, n
, arg_types
);
8117 /* Build a METHOD_TYPE for a member of BASETYPE. The RETTYPE (a TYPE)
8118 and ARGTYPES (a TREE_LIST) are the return type and arguments types
8119 for the method. An implicit additional parameter (of type
8120 pointer-to-BASETYPE) is added to the ARGTYPES. */
8123 build_method_type_directly (tree basetype
,
8129 inchash::hash hstate
;
8130 bool any_structural_p
, any_noncanonical_p
;
8131 tree canon_argtypes
;
8133 /* Make a node of the sort we want. */
8134 t
= make_node (METHOD_TYPE
);
8136 TYPE_METHOD_BASETYPE (t
) = TYPE_MAIN_VARIANT (basetype
);
8137 TREE_TYPE (t
) = rettype
;
8138 ptype
= build_pointer_type (basetype
);
8140 /* The actual arglist for this function includes a "hidden" argument
8141 which is "this". Put it into the list of argument types. */
8142 argtypes
= tree_cons (NULL_TREE
, ptype
, argtypes
);
8143 TYPE_ARG_TYPES (t
) = argtypes
;
8145 /* If we already have such a type, use the old one. */
8146 hstate
.add_object (TYPE_HASH (basetype
));
8147 hstate
.add_object (TYPE_HASH (rettype
));
8148 type_hash_list (argtypes
, hstate
);
8149 t
= type_hash_canon (hstate
.end (), t
);
8151 /* Set up the canonical type. */
8153 = (TYPE_STRUCTURAL_EQUALITY_P (basetype
)
8154 || TYPE_STRUCTURAL_EQUALITY_P (rettype
));
8156 = (TYPE_CANONICAL (basetype
) != basetype
8157 || TYPE_CANONICAL (rettype
) != rettype
);
8158 canon_argtypes
= maybe_canonicalize_argtypes (TREE_CHAIN (argtypes
),
8160 &any_noncanonical_p
);
8161 if (any_structural_p
)
8162 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8163 else if (any_noncanonical_p
)
8165 = build_method_type_directly (TYPE_CANONICAL (basetype
),
8166 TYPE_CANONICAL (rettype
),
8168 if (!COMPLETE_TYPE_P (t
))
8174 /* Construct, lay out and return the type of methods belonging to class
8175 BASETYPE and whose arguments and values are described by TYPE.
8176 If that type exists already, reuse it.
8177 TYPE must be a FUNCTION_TYPE node. */
8180 build_method_type (tree basetype
, tree type
)
8182 gcc_assert (TREE_CODE (type
) == FUNCTION_TYPE
);
8184 return build_method_type_directly (basetype
,
8186 TYPE_ARG_TYPES (type
));
8189 /* Construct, lay out and return the type of offsets to a value
8190 of type TYPE, within an object of type BASETYPE.
8191 If a suitable offset type exists already, reuse it. */
8194 build_offset_type (tree basetype
, tree type
)
8197 inchash::hash hstate
;
8199 /* Make a node of the sort we want. */
8200 t
= make_node (OFFSET_TYPE
);
8202 TYPE_OFFSET_BASETYPE (t
) = TYPE_MAIN_VARIANT (basetype
);
8203 TREE_TYPE (t
) = type
;
8205 /* If we already have such a type, use the old one. */
8206 hstate
.add_object (TYPE_HASH (basetype
));
8207 hstate
.add_object (TYPE_HASH (type
));
8208 t
= type_hash_canon (hstate
.end (), t
);
8210 if (!COMPLETE_TYPE_P (t
))
8213 if (TYPE_CANONICAL (t
) == t
)
8215 if (TYPE_STRUCTURAL_EQUALITY_P (basetype
)
8216 || TYPE_STRUCTURAL_EQUALITY_P (type
))
8217 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8218 else if (TYPE_CANONICAL (TYPE_MAIN_VARIANT (basetype
)) != basetype
8219 || TYPE_CANONICAL (type
) != type
)
8221 = build_offset_type (TYPE_CANONICAL (TYPE_MAIN_VARIANT (basetype
)),
8222 TYPE_CANONICAL (type
));
8228 /* Create a complex type whose components are COMPONENT_TYPE. */
8231 build_complex_type (tree component_type
)
8234 inchash::hash hstate
;
8236 gcc_assert (INTEGRAL_TYPE_P (component_type
)
8237 || SCALAR_FLOAT_TYPE_P (component_type
)
8238 || FIXED_POINT_TYPE_P (component_type
));
8240 /* Make a node of the sort we want. */
8241 t
= make_node (COMPLEX_TYPE
);
8243 TREE_TYPE (t
) = TYPE_MAIN_VARIANT (component_type
);
8245 /* If we already have such a type, use the old one. */
8246 hstate
.add_object (TYPE_HASH (component_type
));
8247 t
= type_hash_canon (hstate
.end (), t
);
8249 if (!COMPLETE_TYPE_P (t
))
8252 if (TYPE_CANONICAL (t
) == t
)
8254 if (TYPE_STRUCTURAL_EQUALITY_P (component_type
))
8255 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8256 else if (TYPE_CANONICAL (component_type
) != component_type
)
8258 = build_complex_type (TYPE_CANONICAL (component_type
));
8261 /* We need to create a name, since complex is a fundamental type. */
8262 if (! TYPE_NAME (t
))
8265 if (component_type
== char_type_node
)
8266 name
= "complex char";
8267 else if (component_type
== signed_char_type_node
)
8268 name
= "complex signed char";
8269 else if (component_type
== unsigned_char_type_node
)
8270 name
= "complex unsigned char";
8271 else if (component_type
== short_integer_type_node
)
8272 name
= "complex short int";
8273 else if (component_type
== short_unsigned_type_node
)
8274 name
= "complex short unsigned int";
8275 else if (component_type
== integer_type_node
)
8276 name
= "complex int";
8277 else if (component_type
== unsigned_type_node
)
8278 name
= "complex unsigned int";
8279 else if (component_type
== long_integer_type_node
)
8280 name
= "complex long int";
8281 else if (component_type
== long_unsigned_type_node
)
8282 name
= "complex long unsigned int";
8283 else if (component_type
== long_long_integer_type_node
)
8284 name
= "complex long long int";
8285 else if (component_type
== long_long_unsigned_type_node
)
8286 name
= "complex long long unsigned int";
8291 TYPE_NAME (t
) = build_decl (UNKNOWN_LOCATION
, TYPE_DECL
,
8292 get_identifier (name
), t
);
8295 return build_qualified_type (t
, TYPE_QUALS (component_type
));
8298 /* If TYPE is a real or complex floating-point type and the target
8299 does not directly support arithmetic on TYPE then return the wider
8300 type to be used for arithmetic on TYPE. Otherwise, return
8304 excess_precision_type (tree type
)
8306 if (flag_excess_precision
!= EXCESS_PRECISION_FAST
)
8308 int flt_eval_method
= TARGET_FLT_EVAL_METHOD
;
8309 switch (TREE_CODE (type
))
8312 switch (flt_eval_method
)
8315 if (TYPE_MODE (type
) == TYPE_MODE (float_type_node
))
8316 return double_type_node
;
8319 if (TYPE_MODE (type
) == TYPE_MODE (float_type_node
)
8320 || TYPE_MODE (type
) == TYPE_MODE (double_type_node
))
8321 return long_double_type_node
;
8328 if (TREE_CODE (TREE_TYPE (type
)) != REAL_TYPE
)
8330 switch (flt_eval_method
)
8333 if (TYPE_MODE (TREE_TYPE (type
)) == TYPE_MODE (float_type_node
))
8334 return complex_double_type_node
;
8337 if (TYPE_MODE (TREE_TYPE (type
)) == TYPE_MODE (float_type_node
)
8338 || (TYPE_MODE (TREE_TYPE (type
))
8339 == TYPE_MODE (double_type_node
)))
8340 return complex_long_double_type_node
;
8353 /* Return OP, stripped of any conversions to wider types as much as is safe.
8354 Converting the value back to OP's type makes a value equivalent to OP.
8356 If FOR_TYPE is nonzero, we return a value which, if converted to
8357 type FOR_TYPE, would be equivalent to converting OP to type FOR_TYPE.
8359 OP must have integer, real or enumeral type. Pointers are not allowed!
8361 There are some cases where the obvious value we could return
8362 would regenerate to OP if converted to OP's type,
8363 but would not extend like OP to wider types.
8364 If FOR_TYPE indicates such extension is contemplated, we eschew such values.
8365 For example, if OP is (unsigned short)(signed char)-1,
8366 we avoid returning (signed char)-1 if FOR_TYPE is int,
8367 even though extending that to an unsigned short would regenerate OP,
8368 since the result of extending (signed char)-1 to (int)
8369 is different from (int) OP. */
8372 get_unwidened (tree op
, tree for_type
)
8374 /* Set UNS initially if converting OP to FOR_TYPE is a zero-extension. */
8375 tree type
= TREE_TYPE (op
);
8377 = TYPE_PRECISION (for_type
!= 0 ? for_type
: type
);
8379 = (for_type
!= 0 && for_type
!= type
8380 && final_prec
> TYPE_PRECISION (type
)
8381 && TYPE_UNSIGNED (type
));
8384 while (CONVERT_EXPR_P (op
))
8388 /* TYPE_PRECISION on vector types has different meaning
8389 (TYPE_VECTOR_SUBPARTS) and casts from vectors are view conversions,
8390 so avoid them here. */
8391 if (TREE_CODE (TREE_TYPE (TREE_OPERAND (op
, 0))) == VECTOR_TYPE
)
8394 bitschange
= TYPE_PRECISION (TREE_TYPE (op
))
8395 - TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (op
, 0)));
8397 /* Truncations are many-one so cannot be removed.
8398 Unless we are later going to truncate down even farther. */
8400 && final_prec
> TYPE_PRECISION (TREE_TYPE (op
)))
8403 /* See what's inside this conversion. If we decide to strip it,
8405 op
= TREE_OPERAND (op
, 0);
8407 /* If we have not stripped any zero-extensions (uns is 0),
8408 we can strip any kind of extension.
8409 If we have previously stripped a zero-extension,
8410 only zero-extensions can safely be stripped.
8411 Any extension can be stripped if the bits it would produce
8412 are all going to be discarded later by truncating to FOR_TYPE. */
8416 if (! uns
|| final_prec
<= TYPE_PRECISION (TREE_TYPE (op
)))
8418 /* TYPE_UNSIGNED says whether this is a zero-extension.
8419 Let's avoid computing it if it does not affect WIN
8420 and if UNS will not be needed again. */
8422 || CONVERT_EXPR_P (op
))
8423 && TYPE_UNSIGNED (TREE_TYPE (op
)))
8431 /* If we finally reach a constant see if it fits in for_type and
8432 in that case convert it. */
8434 && TREE_CODE (win
) == INTEGER_CST
8435 && TREE_TYPE (win
) != for_type
8436 && int_fits_type_p (win
, for_type
))
8437 win
= fold_convert (for_type
, win
);
8442 /* Return OP or a simpler expression for a narrower value
8443 which can be sign-extended or zero-extended to give back OP.
8444 Store in *UNSIGNEDP_PTR either 1 if the value should be zero-extended
8445 or 0 if the value should be sign-extended. */
8448 get_narrower (tree op
, int *unsignedp_ptr
)
8453 bool integral_p
= INTEGRAL_TYPE_P (TREE_TYPE (op
));
8455 while (TREE_CODE (op
) == NOP_EXPR
)
8458 = (TYPE_PRECISION (TREE_TYPE (op
))
8459 - TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (op
, 0))));
8461 /* Truncations are many-one so cannot be removed. */
8465 /* See what's inside this conversion. If we decide to strip it,
8470 op
= TREE_OPERAND (op
, 0);
8471 /* An extension: the outermost one can be stripped,
8472 but remember whether it is zero or sign extension. */
8474 uns
= TYPE_UNSIGNED (TREE_TYPE (op
));
8475 /* Otherwise, if a sign extension has been stripped,
8476 only sign extensions can now be stripped;
8477 if a zero extension has been stripped, only zero-extensions. */
8478 else if (uns
!= TYPE_UNSIGNED (TREE_TYPE (op
)))
8482 else /* bitschange == 0 */
8484 /* A change in nominal type can always be stripped, but we must
8485 preserve the unsignedness. */
8487 uns
= TYPE_UNSIGNED (TREE_TYPE (op
));
8489 op
= TREE_OPERAND (op
, 0);
8490 /* Keep trying to narrow, but don't assign op to win if it
8491 would turn an integral type into something else. */
8492 if (INTEGRAL_TYPE_P (TREE_TYPE (op
)) != integral_p
)
8499 if (TREE_CODE (op
) == COMPONENT_REF
8500 /* Since type_for_size always gives an integer type. */
8501 && TREE_CODE (TREE_TYPE (op
)) != REAL_TYPE
8502 && TREE_CODE (TREE_TYPE (op
)) != FIXED_POINT_TYPE
8503 /* Ensure field is laid out already. */
8504 && DECL_SIZE (TREE_OPERAND (op
, 1)) != 0
8505 && tree_fits_uhwi_p (DECL_SIZE (TREE_OPERAND (op
, 1))))
8507 unsigned HOST_WIDE_INT innerprec
8508 = tree_to_uhwi (DECL_SIZE (TREE_OPERAND (op
, 1)));
8509 int unsignedp
= (DECL_UNSIGNED (TREE_OPERAND (op
, 1))
8510 || TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (op
, 1))));
8511 tree type
= lang_hooks
.types
.type_for_size (innerprec
, unsignedp
);
8513 /* We can get this structure field in a narrower type that fits it,
8514 but the resulting extension to its nominal type (a fullword type)
8515 must satisfy the same conditions as for other extensions.
8517 Do this only for fields that are aligned (not bit-fields),
8518 because when bit-field insns will be used there is no
8519 advantage in doing this. */
8521 if (innerprec
< TYPE_PRECISION (TREE_TYPE (op
))
8522 && ! DECL_BIT_FIELD (TREE_OPERAND (op
, 1))
8523 && (first
|| uns
== DECL_UNSIGNED (TREE_OPERAND (op
, 1)))
8527 uns
= DECL_UNSIGNED (TREE_OPERAND (op
, 1));
8528 win
= fold_convert (type
, op
);
8532 *unsignedp_ptr
= uns
;
8536 /* Returns true if integer constant C has a value that is permissible
8537 for type TYPE (an INTEGER_TYPE). */
8540 int_fits_type_p (const_tree c
, const_tree type
)
8542 tree type_low_bound
, type_high_bound
;
8543 bool ok_for_low_bound
, ok_for_high_bound
;
8544 signop sgn_c
= TYPE_SIGN (TREE_TYPE (c
));
8547 type_low_bound
= TYPE_MIN_VALUE (type
);
8548 type_high_bound
= TYPE_MAX_VALUE (type
);
8550 /* If at least one bound of the type is a constant integer, we can check
8551 ourselves and maybe make a decision. If no such decision is possible, but
8552 this type is a subtype, try checking against that. Otherwise, use
8553 fits_to_tree_p, which checks against the precision.
8555 Compute the status for each possibly constant bound, and return if we see
8556 one does not match. Use ok_for_xxx_bound for this purpose, assigning -1
8557 for "unknown if constant fits", 0 for "constant known *not* to fit" and 1
8558 for "constant known to fit". */
8560 /* Check if c >= type_low_bound. */
8561 if (type_low_bound
&& TREE_CODE (type_low_bound
) == INTEGER_CST
)
8563 if (tree_int_cst_lt (c
, type_low_bound
))
8565 ok_for_low_bound
= true;
8568 ok_for_low_bound
= false;
8570 /* Check if c <= type_high_bound. */
8571 if (type_high_bound
&& TREE_CODE (type_high_bound
) == INTEGER_CST
)
8573 if (tree_int_cst_lt (type_high_bound
, c
))
8575 ok_for_high_bound
= true;
8578 ok_for_high_bound
= false;
8580 /* If the constant fits both bounds, the result is known. */
8581 if (ok_for_low_bound
&& ok_for_high_bound
)
8584 /* Perform some generic filtering which may allow making a decision
8585 even if the bounds are not constant. First, negative integers
8586 never fit in unsigned types, */
8587 if (TYPE_UNSIGNED (type
) && sgn_c
== SIGNED
&& wi::neg_p (c
))
8590 /* Second, narrower types always fit in wider ones. */
8591 if (TYPE_PRECISION (type
) > TYPE_PRECISION (TREE_TYPE (c
)))
8594 /* Third, unsigned integers with top bit set never fit signed types. */
8595 if (!TYPE_UNSIGNED (type
) && sgn_c
== UNSIGNED
)
8597 int prec
= GET_MODE_PRECISION (TYPE_MODE (TREE_TYPE (c
))) - 1;
8598 if (prec
< TYPE_PRECISION (TREE_TYPE (c
)))
8600 /* When a tree_cst is converted to a wide-int, the precision
8601 is taken from the type. However, if the precision of the
8602 mode underneath the type is smaller than that, it is
8603 possible that the value will not fit. The test below
8604 fails if any bit is set between the sign bit of the
8605 underlying mode and the top bit of the type. */
8606 if (wi::ne_p (wi::zext (c
, prec
- 1), c
))
8609 else if (wi::neg_p (c
))
8613 /* If we haven't been able to decide at this point, there nothing more we
8614 can check ourselves here. Look at the base type if we have one and it
8615 has the same precision. */
8616 if (TREE_CODE (type
) == INTEGER_TYPE
8617 && TREE_TYPE (type
) != 0
8618 && TYPE_PRECISION (type
) == TYPE_PRECISION (TREE_TYPE (type
)))
8620 type
= TREE_TYPE (type
);
8624 /* Or to fits_to_tree_p, if nothing else. */
8625 return wi::fits_to_tree_p (c
, type
);
8628 /* Stores bounds of an integer TYPE in MIN and MAX. If TYPE has non-constant
8629 bounds or is a POINTER_TYPE, the maximum and/or minimum values that can be
8630 represented (assuming two's-complement arithmetic) within the bit
8631 precision of the type are returned instead. */
8634 get_type_static_bounds (const_tree type
, mpz_t min
, mpz_t max
)
8636 if (!POINTER_TYPE_P (type
) && TYPE_MIN_VALUE (type
)
8637 && TREE_CODE (TYPE_MIN_VALUE (type
)) == INTEGER_CST
)
8638 wi::to_mpz (TYPE_MIN_VALUE (type
), min
, TYPE_SIGN (type
));
8641 if (TYPE_UNSIGNED (type
))
8642 mpz_set_ui (min
, 0);
8645 wide_int mn
= wi::min_value (TYPE_PRECISION (type
), SIGNED
);
8646 wi::to_mpz (mn
, min
, SIGNED
);
8650 if (!POINTER_TYPE_P (type
) && TYPE_MAX_VALUE (type
)
8651 && TREE_CODE (TYPE_MAX_VALUE (type
)) == INTEGER_CST
)
8652 wi::to_mpz (TYPE_MAX_VALUE (type
), max
, TYPE_SIGN (type
));
8655 wide_int mn
= wi::max_value (TYPE_PRECISION (type
), TYPE_SIGN (type
));
8656 wi::to_mpz (mn
, max
, TYPE_SIGN (type
));
8660 /* Return true if VAR is an automatic variable defined in function FN. */
8663 auto_var_in_fn_p (const_tree var
, const_tree fn
)
8665 return (DECL_P (var
) && DECL_CONTEXT (var
) == fn
8666 && ((((TREE_CODE (var
) == VAR_DECL
&& ! DECL_EXTERNAL (var
))
8667 || TREE_CODE (var
) == PARM_DECL
)
8668 && ! TREE_STATIC (var
))
8669 || TREE_CODE (var
) == LABEL_DECL
8670 || TREE_CODE (var
) == RESULT_DECL
));
8673 /* Subprogram of following function. Called by walk_tree.
8675 Return *TP if it is an automatic variable or parameter of the
8676 function passed in as DATA. */
8679 find_var_from_fn (tree
*tp
, int *walk_subtrees
, void *data
)
8681 tree fn
= (tree
) data
;
8686 else if (DECL_P (*tp
)
8687 && auto_var_in_fn_p (*tp
, fn
))
8693 /* Returns true if T is, contains, or refers to a type with variable
8694 size. For METHOD_TYPEs and FUNCTION_TYPEs we exclude the
8695 arguments, but not the return type. If FN is nonzero, only return
8696 true if a modifier of the type or position of FN is a variable or
8697 parameter inside FN.
8699 This concept is more general than that of C99 'variably modified types':
8700 in C99, a struct type is never variably modified because a VLA may not
8701 appear as a structure member. However, in GNU C code like:
8703 struct S { int i[f()]; };
8705 is valid, and other languages may define similar constructs. */
8708 variably_modified_type_p (tree type
, tree fn
)
8712 /* Test if T is either variable (if FN is zero) or an expression containing
8713 a variable in FN. If TYPE isn't gimplified, return true also if
8714 gimplify_one_sizepos would gimplify the expression into a local
8716 #define RETURN_TRUE_IF_VAR(T) \
8717 do { tree _t = (T); \
8718 if (_t != NULL_TREE \
8719 && _t != error_mark_node \
8720 && TREE_CODE (_t) != INTEGER_CST \
8721 && TREE_CODE (_t) != PLACEHOLDER_EXPR \
8723 || (!TYPE_SIZES_GIMPLIFIED (type) \
8724 && !is_gimple_sizepos (_t)) \
8725 || walk_tree (&_t, find_var_from_fn, fn, NULL))) \
8726 return true; } while (0)
8728 if (type
== error_mark_node
)
8731 /* If TYPE itself has variable size, it is variably modified. */
8732 RETURN_TRUE_IF_VAR (TYPE_SIZE (type
));
8733 RETURN_TRUE_IF_VAR (TYPE_SIZE_UNIT (type
));
8735 switch (TREE_CODE (type
))
8738 case REFERENCE_TYPE
:
8740 if (variably_modified_type_p (TREE_TYPE (type
), fn
))
8746 /* If TYPE is a function type, it is variably modified if the
8747 return type is variably modified. */
8748 if (variably_modified_type_p (TREE_TYPE (type
), fn
))
8754 case FIXED_POINT_TYPE
:
8757 /* Scalar types are variably modified if their end points
8759 RETURN_TRUE_IF_VAR (TYPE_MIN_VALUE (type
));
8760 RETURN_TRUE_IF_VAR (TYPE_MAX_VALUE (type
));
8765 case QUAL_UNION_TYPE
:
8766 /* We can't see if any of the fields are variably-modified by the
8767 definition we normally use, since that would produce infinite
8768 recursion via pointers. */
8769 /* This is variably modified if some field's type is. */
8770 for (t
= TYPE_FIELDS (type
); t
; t
= DECL_CHAIN (t
))
8771 if (TREE_CODE (t
) == FIELD_DECL
)
8773 RETURN_TRUE_IF_VAR (DECL_FIELD_OFFSET (t
));
8774 RETURN_TRUE_IF_VAR (DECL_SIZE (t
));
8775 RETURN_TRUE_IF_VAR (DECL_SIZE_UNIT (t
));
8777 if (TREE_CODE (type
) == QUAL_UNION_TYPE
)
8778 RETURN_TRUE_IF_VAR (DECL_QUALIFIER (t
));
8783 /* Do not call ourselves to avoid infinite recursion. This is
8784 variably modified if the element type is. */
8785 RETURN_TRUE_IF_VAR (TYPE_SIZE (TREE_TYPE (type
)));
8786 RETURN_TRUE_IF_VAR (TYPE_SIZE_UNIT (TREE_TYPE (type
)));
8793 /* The current language may have other cases to check, but in general,
8794 all other types are not variably modified. */
8795 return lang_hooks
.tree_inlining
.var_mod_type_p (type
, fn
);
8797 #undef RETURN_TRUE_IF_VAR
8800 /* Given a DECL or TYPE, return the scope in which it was declared, or
8801 NULL_TREE if there is no containing scope. */
8804 get_containing_scope (const_tree t
)
8806 return (TYPE_P (t
) ? TYPE_CONTEXT (t
) : DECL_CONTEXT (t
));
8809 /* Return the innermost context enclosing DECL that is
8810 a FUNCTION_DECL, or zero if none. */
8813 decl_function_context (const_tree decl
)
8817 if (TREE_CODE (decl
) == ERROR_MARK
)
8820 /* C++ virtual functions use DECL_CONTEXT for the class of the vtable
8821 where we look up the function at runtime. Such functions always take
8822 a first argument of type 'pointer to real context'.
8824 C++ should really be fixed to use DECL_CONTEXT for the real context,
8825 and use something else for the "virtual context". */
8826 else if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_VINDEX (decl
))
8829 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl
)))));
8831 context
= DECL_CONTEXT (decl
);
8833 while (context
&& TREE_CODE (context
) != FUNCTION_DECL
)
8835 if (TREE_CODE (context
) == BLOCK
)
8836 context
= BLOCK_SUPERCONTEXT (context
);
8838 context
= get_containing_scope (context
);
8844 /* Return the innermost context enclosing DECL that is
8845 a RECORD_TYPE, UNION_TYPE or QUAL_UNION_TYPE, or zero if none.
8846 TYPE_DECLs and FUNCTION_DECLs are transparent to this function. */
8849 decl_type_context (const_tree decl
)
8851 tree context
= DECL_CONTEXT (decl
);
8854 switch (TREE_CODE (context
))
8856 case NAMESPACE_DECL
:
8857 case TRANSLATION_UNIT_DECL
:
8862 case QUAL_UNION_TYPE
:
8867 context
= DECL_CONTEXT (context
);
8871 context
= BLOCK_SUPERCONTEXT (context
);
8881 /* CALL is a CALL_EXPR. Return the declaration for the function
8882 called, or NULL_TREE if the called function cannot be
8886 get_callee_fndecl (const_tree call
)
8890 if (call
== error_mark_node
)
8891 return error_mark_node
;
8893 /* It's invalid to call this function with anything but a
8895 gcc_assert (TREE_CODE (call
) == CALL_EXPR
);
8897 /* The first operand to the CALL is the address of the function
8899 addr
= CALL_EXPR_FN (call
);
8901 /* If there is no function, return early. */
8902 if (addr
== NULL_TREE
)
8907 /* If this is a readonly function pointer, extract its initial value. */
8908 if (DECL_P (addr
) && TREE_CODE (addr
) != FUNCTION_DECL
8909 && TREE_READONLY (addr
) && ! TREE_THIS_VOLATILE (addr
)
8910 && DECL_INITIAL (addr
))
8911 addr
= DECL_INITIAL (addr
);
8913 /* If the address is just `&f' for some function `f', then we know
8914 that `f' is being called. */
8915 if (TREE_CODE (addr
) == ADDR_EXPR
8916 && TREE_CODE (TREE_OPERAND (addr
, 0)) == FUNCTION_DECL
)
8917 return TREE_OPERAND (addr
, 0);
8919 /* We couldn't figure out what was being called. */
8923 /* Print debugging information about tree nodes generated during the compile,
8924 and any language-specific information. */
8927 dump_tree_statistics (void)
8929 if (GATHER_STATISTICS
)
8932 int total_nodes
, total_bytes
;
8933 fprintf (stderr
, "Kind Nodes Bytes\n");
8934 fprintf (stderr
, "---------------------------------------\n");
8935 total_nodes
= total_bytes
= 0;
8936 for (i
= 0; i
< (int) all_kinds
; i
++)
8938 fprintf (stderr
, "%-20s %7d %10d\n", tree_node_kind_names
[i
],
8939 tree_node_counts
[i
], tree_node_sizes
[i
]);
8940 total_nodes
+= tree_node_counts
[i
];
8941 total_bytes
+= tree_node_sizes
[i
];
8943 fprintf (stderr
, "---------------------------------------\n");
8944 fprintf (stderr
, "%-20s %7d %10d\n", "Total", total_nodes
, total_bytes
);
8945 fprintf (stderr
, "---------------------------------------\n");
8946 fprintf (stderr
, "Code Nodes\n");
8947 fprintf (stderr
, "----------------------------\n");
8948 for (i
= 0; i
< (int) MAX_TREE_CODES
; i
++)
8949 fprintf (stderr
, "%-20s %7d\n", get_tree_code_name ((enum tree_code
) i
),
8950 tree_code_counts
[i
]);
8951 fprintf (stderr
, "----------------------------\n");
8952 ssanames_print_statistics ();
8953 phinodes_print_statistics ();
8956 fprintf (stderr
, "(No per-node statistics)\n");
8958 print_type_hash_statistics ();
8959 print_debug_expr_statistics ();
8960 print_value_expr_statistics ();
8961 lang_hooks
.print_statistics ();
8964 #define FILE_FUNCTION_FORMAT "_GLOBAL__%s_%s"
8966 /* Generate a crc32 of a byte. */
8969 crc32_unsigned_bits (unsigned chksum
, unsigned value
, unsigned bits
)
8973 for (ix
= bits
; ix
--; value
<<= 1)
8977 feedback
= (value
^ chksum
) & 0x80000000 ? 0x04c11db7 : 0;
8984 /* Generate a crc32 of a 32-bit unsigned. */
8987 crc32_unsigned (unsigned chksum
, unsigned value
)
8989 return crc32_unsigned_bits (chksum
, value
, 32);
8992 /* Generate a crc32 of a byte. */
8995 crc32_byte (unsigned chksum
, char byte
)
8997 return crc32_unsigned_bits (chksum
, (unsigned) byte
<< 24, 8);
9000 /* Generate a crc32 of a string. */
9003 crc32_string (unsigned chksum
, const char *string
)
9007 chksum
= crc32_byte (chksum
, *string
);
9013 /* P is a string that will be used in a symbol. Mask out any characters
9014 that are not valid in that context. */
9017 clean_symbol_name (char *p
)
9021 #ifndef NO_DOLLAR_IN_LABEL /* this for `$'; unlikely, but... -- kr */
9024 #ifndef NO_DOT_IN_LABEL /* this for `.'; unlikely, but... */
9031 /* Generate a name for a special-purpose function.
9032 The generated name may need to be unique across the whole link.
9033 Changes to this function may also require corresponding changes to
9034 xstrdup_mask_random.
9035 TYPE is some string to identify the purpose of this function to the
9036 linker or collect2; it must start with an uppercase letter,
9038 I - for constructors
9040 N - for C++ anonymous namespaces
9041 F - for DWARF unwind frame information. */
9044 get_file_function_name (const char *type
)
9050 /* If we already have a name we know to be unique, just use that. */
9051 if (first_global_object_name
)
9052 p
= q
= ASTRDUP (first_global_object_name
);
9053 /* If the target is handling the constructors/destructors, they
9054 will be local to this file and the name is only necessary for
9056 We also assign sub_I and sub_D sufixes to constructors called from
9057 the global static constructors. These are always local. */
9058 else if (((type
[0] == 'I' || type
[0] == 'D') && targetm
.have_ctors_dtors
)
9059 || (strncmp (type
, "sub_", 4) == 0
9060 && (type
[4] == 'I' || type
[4] == 'D')))
9062 const char *file
= main_input_filename
;
9064 file
= LOCATION_FILE (input_location
);
9065 /* Just use the file's basename, because the full pathname
9066 might be quite long. */
9067 p
= q
= ASTRDUP (lbasename (file
));
9071 /* Otherwise, the name must be unique across the entire link.
9072 We don't have anything that we know to be unique to this translation
9073 unit, so use what we do have and throw in some randomness. */
9075 const char *name
= weak_global_object_name
;
9076 const char *file
= main_input_filename
;
9081 file
= LOCATION_FILE (input_location
);
9083 len
= strlen (file
);
9084 q
= (char *) alloca (9 + 17 + len
+ 1);
9085 memcpy (q
, file
, len
+ 1);
9087 snprintf (q
+ len
, 9 + 17 + 1, "_%08X_" HOST_WIDE_INT_PRINT_HEX
,
9088 crc32_string (0, name
), get_random_seed (false));
9093 clean_symbol_name (q
);
9094 buf
= (char *) alloca (sizeof (FILE_FUNCTION_FORMAT
) + strlen (p
)
9097 /* Set up the name of the file-level functions we may need.
9098 Use a global object (which is already required to be unique over
9099 the program) rather than the file name (which imposes extra
9101 sprintf (buf
, FILE_FUNCTION_FORMAT
, type
, p
);
9103 return get_identifier (buf
);
9106 #if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007)
9108 /* Complain that the tree code of NODE does not match the expected 0
9109 terminated list of trailing codes. The trailing code list can be
9110 empty, for a more vague error message. FILE, LINE, and FUNCTION
9111 are of the caller. */
9114 tree_check_failed (const_tree node
, const char *file
,
9115 int line
, const char *function
, ...)
9119 unsigned length
= 0;
9120 enum tree_code code
;
9122 va_start (args
, function
);
9123 while ((code
= (enum tree_code
) va_arg (args
, int)))
9124 length
+= 4 + strlen (get_tree_code_name (code
));
9129 va_start (args
, function
);
9130 length
+= strlen ("expected ");
9131 buffer
= tmp
= (char *) alloca (length
);
9133 while ((code
= (enum tree_code
) va_arg (args
, int)))
9135 const char *prefix
= length
? " or " : "expected ";
9137 strcpy (tmp
+ length
, prefix
);
9138 length
+= strlen (prefix
);
9139 strcpy (tmp
+ length
, get_tree_code_name (code
));
9140 length
+= strlen (get_tree_code_name (code
));
9145 buffer
= "unexpected node";
9147 internal_error ("tree check: %s, have %s in %s, at %s:%d",
9148 buffer
, get_tree_code_name (TREE_CODE (node
)),
9149 function
, trim_filename (file
), line
);
9152 /* Complain that the tree code of NODE does match the expected 0
9153 terminated list of trailing codes. FILE, LINE, and FUNCTION are of
9157 tree_not_check_failed (const_tree node
, const char *file
,
9158 int line
, const char *function
, ...)
9162 unsigned length
= 0;
9163 enum tree_code code
;
9165 va_start (args
, function
);
9166 while ((code
= (enum tree_code
) va_arg (args
, int)))
9167 length
+= 4 + strlen (get_tree_code_name (code
));
9169 va_start (args
, function
);
9170 buffer
= (char *) alloca (length
);
9172 while ((code
= (enum tree_code
) va_arg (args
, int)))
9176 strcpy (buffer
+ length
, " or ");
9179 strcpy (buffer
+ length
, get_tree_code_name (code
));
9180 length
+= strlen (get_tree_code_name (code
));
9184 internal_error ("tree check: expected none of %s, have %s in %s, at %s:%d",
9185 buffer
, get_tree_code_name (TREE_CODE (node
)),
9186 function
, trim_filename (file
), line
);
9189 /* Similar to tree_check_failed, except that we check for a class of tree
9190 code, given in CL. */
9193 tree_class_check_failed (const_tree node
, const enum tree_code_class cl
,
9194 const char *file
, int line
, const char *function
)
9197 ("tree check: expected class %qs, have %qs (%s) in %s, at %s:%d",
9198 TREE_CODE_CLASS_STRING (cl
),
9199 TREE_CODE_CLASS_STRING (TREE_CODE_CLASS (TREE_CODE (node
))),
9200 get_tree_code_name (TREE_CODE (node
)), function
, trim_filename (file
), line
);
9203 /* Similar to tree_check_failed, except that instead of specifying a
9204 dozen codes, use the knowledge that they're all sequential. */
9207 tree_range_check_failed (const_tree node
, const char *file
, int line
,
9208 const char *function
, enum tree_code c1
,
9212 unsigned length
= 0;
9215 for (c
= c1
; c
<= c2
; ++c
)
9216 length
+= 4 + strlen (get_tree_code_name ((enum tree_code
) c
));
9218 length
+= strlen ("expected ");
9219 buffer
= (char *) alloca (length
);
9222 for (c
= c1
; c
<= c2
; ++c
)
9224 const char *prefix
= length
? " or " : "expected ";
9226 strcpy (buffer
+ length
, prefix
);
9227 length
+= strlen (prefix
);
9228 strcpy (buffer
+ length
, get_tree_code_name ((enum tree_code
) c
));
9229 length
+= strlen (get_tree_code_name ((enum tree_code
) c
));
9232 internal_error ("tree check: %s, have %s in %s, at %s:%d",
9233 buffer
, get_tree_code_name (TREE_CODE (node
)),
9234 function
, trim_filename (file
), line
);
9238 /* Similar to tree_check_failed, except that we check that a tree does
9239 not have the specified code, given in CL. */
9242 tree_not_class_check_failed (const_tree node
, const enum tree_code_class cl
,
9243 const char *file
, int line
, const char *function
)
9246 ("tree check: did not expect class %qs, have %qs (%s) in %s, at %s:%d",
9247 TREE_CODE_CLASS_STRING (cl
),
9248 TREE_CODE_CLASS_STRING (TREE_CODE_CLASS (TREE_CODE (node
))),
9249 get_tree_code_name (TREE_CODE (node
)), function
, trim_filename (file
), line
);
9253 /* Similar to tree_check_failed but applied to OMP_CLAUSE codes. */
9256 omp_clause_check_failed (const_tree node
, const char *file
, int line
,
9257 const char *function
, enum omp_clause_code code
)
9259 internal_error ("tree check: expected omp_clause %s, have %s in %s, at %s:%d",
9260 omp_clause_code_name
[code
], get_tree_code_name (TREE_CODE (node
)),
9261 function
, trim_filename (file
), line
);
9265 /* Similar to tree_range_check_failed but applied to OMP_CLAUSE codes. */
9268 omp_clause_range_check_failed (const_tree node
, const char *file
, int line
,
9269 const char *function
, enum omp_clause_code c1
,
9270 enum omp_clause_code c2
)
9273 unsigned length
= 0;
9276 for (c
= c1
; c
<= c2
; ++c
)
9277 length
+= 4 + strlen (omp_clause_code_name
[c
]);
9279 length
+= strlen ("expected ");
9280 buffer
= (char *) alloca (length
);
9283 for (c
= c1
; c
<= c2
; ++c
)
9285 const char *prefix
= length
? " or " : "expected ";
9287 strcpy (buffer
+ length
, prefix
);
9288 length
+= strlen (prefix
);
9289 strcpy (buffer
+ length
, omp_clause_code_name
[c
]);
9290 length
+= strlen (omp_clause_code_name
[c
]);
9293 internal_error ("tree check: %s, have %s in %s, at %s:%d",
9294 buffer
, omp_clause_code_name
[TREE_CODE (node
)],
9295 function
, trim_filename (file
), line
);
9299 #undef DEFTREESTRUCT
9300 #define DEFTREESTRUCT(VAL, NAME) NAME,
9302 static const char *ts_enum_names
[] = {
9303 #include "treestruct.def"
9305 #undef DEFTREESTRUCT
9307 #define TS_ENUM_NAME(EN) (ts_enum_names[(EN)])
9309 /* Similar to tree_class_check_failed, except that we check for
9310 whether CODE contains the tree structure identified by EN. */
9313 tree_contains_struct_check_failed (const_tree node
,
9314 const enum tree_node_structure_enum en
,
9315 const char *file
, int line
,
9316 const char *function
)
9319 ("tree check: expected tree that contains %qs structure, have %qs in %s, at %s:%d",
9321 get_tree_code_name (TREE_CODE (node
)), function
, trim_filename (file
), line
);
9325 /* Similar to above, except that the check is for the bounds of a TREE_VEC's
9326 (dynamically sized) vector. */
9329 tree_int_cst_elt_check_failed (int idx
, int len
, const char *file
, int line
,
9330 const char *function
)
9333 ("tree check: accessed elt %d of tree_int_cst with %d elts in %s, at %s:%d",
9334 idx
+ 1, len
, function
, trim_filename (file
), line
);
9337 /* Similar to above, except that the check is for the bounds of a TREE_VEC's
9338 (dynamically sized) vector. */
9341 tree_vec_elt_check_failed (int idx
, int len
, const char *file
, int line
,
9342 const char *function
)
9345 ("tree check: accessed elt %d of tree_vec with %d elts in %s, at %s:%d",
9346 idx
+ 1, len
, function
, trim_filename (file
), line
);
9349 /* Similar to above, except that the check is for the bounds of the operand
9350 vector of an expression node EXP. */
9353 tree_operand_check_failed (int idx
, const_tree exp
, const char *file
,
9354 int line
, const char *function
)
9356 enum tree_code code
= TREE_CODE (exp
);
9358 ("tree check: accessed operand %d of %s with %d operands in %s, at %s:%d",
9359 idx
+ 1, get_tree_code_name (code
), TREE_OPERAND_LENGTH (exp
),
9360 function
, trim_filename (file
), line
);
9363 /* Similar to above, except that the check is for the number of
9364 operands of an OMP_CLAUSE node. */
9367 omp_clause_operand_check_failed (int idx
, const_tree t
, const char *file
,
9368 int line
, const char *function
)
9371 ("tree check: accessed operand %d of omp_clause %s with %d operands "
9372 "in %s, at %s:%d", idx
+ 1, omp_clause_code_name
[OMP_CLAUSE_CODE (t
)],
9373 omp_clause_num_ops
[OMP_CLAUSE_CODE (t
)], function
,
9374 trim_filename (file
), line
);
9376 #endif /* ENABLE_TREE_CHECKING */
9378 /* Create a new vector type node holding SUBPARTS units of type INNERTYPE,
9379 and mapped to the machine mode MODE. Initialize its fields and build
9380 the information necessary for debugging output. */
9383 make_vector_type (tree innertype
, int nunits
, enum machine_mode mode
)
9386 inchash::hash hstate
;
9388 t
= make_node (VECTOR_TYPE
);
9389 TREE_TYPE (t
) = TYPE_MAIN_VARIANT (innertype
);
9390 SET_TYPE_VECTOR_SUBPARTS (t
, nunits
);
9391 SET_TYPE_MODE (t
, mode
);
9393 if (TYPE_STRUCTURAL_EQUALITY_P (innertype
))
9394 SET_TYPE_STRUCTURAL_EQUALITY (t
);
9395 else if (TYPE_CANONICAL (innertype
) != innertype
9396 || mode
!= VOIDmode
)
9398 = make_vector_type (TYPE_CANONICAL (innertype
), nunits
, VOIDmode
);
9402 hstate
.add_wide_int (VECTOR_TYPE
);
9403 hstate
.add_wide_int (nunits
);
9404 hstate
.add_wide_int (mode
);
9405 hstate
.add_object (TYPE_HASH (TREE_TYPE (t
)));
9406 t
= type_hash_canon (hstate
.end (), t
);
9408 /* We have built a main variant, based on the main variant of the
9409 inner type. Use it to build the variant we return. */
9410 if ((TYPE_ATTRIBUTES (innertype
) || TYPE_QUALS (innertype
))
9411 && TREE_TYPE (t
) != innertype
)
9412 return build_type_attribute_qual_variant (t
,
9413 TYPE_ATTRIBUTES (innertype
),
9414 TYPE_QUALS (innertype
));
9420 make_or_reuse_type (unsigned size
, int unsignedp
)
9422 if (size
== INT_TYPE_SIZE
)
9423 return unsignedp
? unsigned_type_node
: integer_type_node
;
9424 if (size
== CHAR_TYPE_SIZE
)
9425 return unsignedp
? unsigned_char_type_node
: signed_char_type_node
;
9426 if (size
== SHORT_TYPE_SIZE
)
9427 return unsignedp
? short_unsigned_type_node
: short_integer_type_node
;
9428 if (size
== LONG_TYPE_SIZE
)
9429 return unsignedp
? long_unsigned_type_node
: long_integer_type_node
;
9430 if (size
== LONG_LONG_TYPE_SIZE
)
9431 return (unsignedp
? long_long_unsigned_type_node
9432 : long_long_integer_type_node
);
9433 if (size
== 128 && int128_integer_type_node
)
9434 return (unsignedp
? int128_unsigned_type_node
9435 : int128_integer_type_node
);
9438 return make_unsigned_type (size
);
9440 return make_signed_type (size
);
9443 /* Create or reuse a fract type by SIZE, UNSIGNEDP, and SATP. */
9446 make_or_reuse_fract_type (unsigned size
, int unsignedp
, int satp
)
9450 if (size
== SHORT_FRACT_TYPE_SIZE
)
9451 return unsignedp
? sat_unsigned_short_fract_type_node
9452 : sat_short_fract_type_node
;
9453 if (size
== FRACT_TYPE_SIZE
)
9454 return unsignedp
? sat_unsigned_fract_type_node
: sat_fract_type_node
;
9455 if (size
== LONG_FRACT_TYPE_SIZE
)
9456 return unsignedp
? sat_unsigned_long_fract_type_node
9457 : sat_long_fract_type_node
;
9458 if (size
== LONG_LONG_FRACT_TYPE_SIZE
)
9459 return unsignedp
? sat_unsigned_long_long_fract_type_node
9460 : sat_long_long_fract_type_node
;
9464 if (size
== SHORT_FRACT_TYPE_SIZE
)
9465 return unsignedp
? unsigned_short_fract_type_node
9466 : short_fract_type_node
;
9467 if (size
== FRACT_TYPE_SIZE
)
9468 return unsignedp
? unsigned_fract_type_node
: fract_type_node
;
9469 if (size
== LONG_FRACT_TYPE_SIZE
)
9470 return unsignedp
? unsigned_long_fract_type_node
9471 : long_fract_type_node
;
9472 if (size
== LONG_LONG_FRACT_TYPE_SIZE
)
9473 return unsignedp
? unsigned_long_long_fract_type_node
9474 : long_long_fract_type_node
;
9477 return make_fract_type (size
, unsignedp
, satp
);
9480 /* Create or reuse an accum type by SIZE, UNSIGNEDP, and SATP. */
9483 make_or_reuse_accum_type (unsigned size
, int unsignedp
, int satp
)
9487 if (size
== SHORT_ACCUM_TYPE_SIZE
)
9488 return unsignedp
? sat_unsigned_short_accum_type_node
9489 : sat_short_accum_type_node
;
9490 if (size
== ACCUM_TYPE_SIZE
)
9491 return unsignedp
? sat_unsigned_accum_type_node
: sat_accum_type_node
;
9492 if (size
== LONG_ACCUM_TYPE_SIZE
)
9493 return unsignedp
? sat_unsigned_long_accum_type_node
9494 : sat_long_accum_type_node
;
9495 if (size
== LONG_LONG_ACCUM_TYPE_SIZE
)
9496 return unsignedp
? sat_unsigned_long_long_accum_type_node
9497 : sat_long_long_accum_type_node
;
9501 if (size
== SHORT_ACCUM_TYPE_SIZE
)
9502 return unsignedp
? unsigned_short_accum_type_node
9503 : short_accum_type_node
;
9504 if (size
== ACCUM_TYPE_SIZE
)
9505 return unsignedp
? unsigned_accum_type_node
: accum_type_node
;
9506 if (size
== LONG_ACCUM_TYPE_SIZE
)
9507 return unsignedp
? unsigned_long_accum_type_node
9508 : long_accum_type_node
;
9509 if (size
== LONG_LONG_ACCUM_TYPE_SIZE
)
9510 return unsignedp
? unsigned_long_long_accum_type_node
9511 : long_long_accum_type_node
;
9514 return make_accum_type (size
, unsignedp
, satp
);
9518 /* Create an atomic variant node for TYPE. This routine is called
9519 during initialization of data types to create the 5 basic atomic
9520 types. The generic build_variant_type function requires these to
9521 already be set up in order to function properly, so cannot be
9522 called from there. If ALIGN is non-zero, then ensure alignment is
9523 overridden to this value. */
9526 build_atomic_base (tree type
, unsigned int align
)
9530 /* Make sure its not already registered. */
9531 if ((t
= get_qualified_type (type
, TYPE_QUAL_ATOMIC
)))
9534 t
= build_variant_type_copy (type
);
9535 set_type_quals (t
, TYPE_QUAL_ATOMIC
);
9538 TYPE_ALIGN (t
) = align
;
9543 /* Create nodes for all integer types (and error_mark_node) using the sizes
9544 of C datatypes. SIGNED_CHAR specifies whether char is signed,
9545 SHORT_DOUBLE specifies whether double should be of the same precision
9549 build_common_tree_nodes (bool signed_char
, bool short_double
)
9551 error_mark_node
= make_node (ERROR_MARK
);
9552 TREE_TYPE (error_mark_node
) = error_mark_node
;
9554 initialize_sizetypes ();
9556 /* Define both `signed char' and `unsigned char'. */
9557 signed_char_type_node
= make_signed_type (CHAR_TYPE_SIZE
);
9558 TYPE_STRING_FLAG (signed_char_type_node
) = 1;
9559 unsigned_char_type_node
= make_unsigned_type (CHAR_TYPE_SIZE
);
9560 TYPE_STRING_FLAG (unsigned_char_type_node
) = 1;
9562 /* Define `char', which is like either `signed char' or `unsigned char'
9563 but not the same as either. */
9566 ? make_signed_type (CHAR_TYPE_SIZE
)
9567 : make_unsigned_type (CHAR_TYPE_SIZE
));
9568 TYPE_STRING_FLAG (char_type_node
) = 1;
9570 short_integer_type_node
= make_signed_type (SHORT_TYPE_SIZE
);
9571 short_unsigned_type_node
= make_unsigned_type (SHORT_TYPE_SIZE
);
9572 integer_type_node
= make_signed_type (INT_TYPE_SIZE
);
9573 unsigned_type_node
= make_unsigned_type (INT_TYPE_SIZE
);
9574 long_integer_type_node
= make_signed_type (LONG_TYPE_SIZE
);
9575 long_unsigned_type_node
= make_unsigned_type (LONG_TYPE_SIZE
);
9576 long_long_integer_type_node
= make_signed_type (LONG_LONG_TYPE_SIZE
);
9577 long_long_unsigned_type_node
= make_unsigned_type (LONG_LONG_TYPE_SIZE
);
9578 #if HOST_BITS_PER_WIDE_INT >= 64
9579 /* TODO: This isn't correct, but as logic depends at the moment on
9580 host's instead of target's wide-integer.
9581 If there is a target not supporting TImode, but has an 128-bit
9582 integer-scalar register, this target check needs to be adjusted. */
9583 if (targetm
.scalar_mode_supported_p (TImode
))
9585 int128_integer_type_node
= make_signed_type (128);
9586 int128_unsigned_type_node
= make_unsigned_type (128);
9590 /* Define a boolean type. This type only represents boolean values but
9591 may be larger than char depending on the value of BOOL_TYPE_SIZE. */
9592 boolean_type_node
= make_unsigned_type (BOOL_TYPE_SIZE
);
9593 TREE_SET_CODE (boolean_type_node
, BOOLEAN_TYPE
);
9594 TYPE_PRECISION (boolean_type_node
) = 1;
9595 TYPE_MAX_VALUE (boolean_type_node
) = build_int_cst (boolean_type_node
, 1);
9597 /* Define what type to use for size_t. */
9598 if (strcmp (SIZE_TYPE
, "unsigned int") == 0)
9599 size_type_node
= unsigned_type_node
;
9600 else if (strcmp (SIZE_TYPE
, "long unsigned int") == 0)
9601 size_type_node
= long_unsigned_type_node
;
9602 else if (strcmp (SIZE_TYPE
, "long long unsigned int") == 0)
9603 size_type_node
= long_long_unsigned_type_node
;
9604 else if (strcmp (SIZE_TYPE
, "short unsigned int") == 0)
9605 size_type_node
= short_unsigned_type_node
;
9609 /* Fill in the rest of the sized types. Reuse existing type nodes
9611 intQI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (QImode
), 0);
9612 intHI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (HImode
), 0);
9613 intSI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (SImode
), 0);
9614 intDI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (DImode
), 0);
9615 intTI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (TImode
), 0);
9617 unsigned_intQI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (QImode
), 1);
9618 unsigned_intHI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (HImode
), 1);
9619 unsigned_intSI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (SImode
), 1);
9620 unsigned_intDI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (DImode
), 1);
9621 unsigned_intTI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (TImode
), 1);
9623 /* Don't call build_qualified type for atomics. That routine does
9624 special processing for atomics, and until they are initialized
9625 it's better not to make that call.
9627 Check to see if there is a target override for atomic types. */
9629 atomicQI_type_node
= build_atomic_base (unsigned_intQI_type_node
,
9630 targetm
.atomic_align_for_mode (QImode
));
9631 atomicHI_type_node
= build_atomic_base (unsigned_intHI_type_node
,
9632 targetm
.atomic_align_for_mode (HImode
));
9633 atomicSI_type_node
= build_atomic_base (unsigned_intSI_type_node
,
9634 targetm
.atomic_align_for_mode (SImode
));
9635 atomicDI_type_node
= build_atomic_base (unsigned_intDI_type_node
,
9636 targetm
.atomic_align_for_mode (DImode
));
9637 atomicTI_type_node
= build_atomic_base (unsigned_intTI_type_node
,
9638 targetm
.atomic_align_for_mode (TImode
));
9640 access_public_node
= get_identifier ("public");
9641 access_protected_node
= get_identifier ("protected");
9642 access_private_node
= get_identifier ("private");
9644 /* Define these next since types below may used them. */
9645 integer_zero_node
= build_int_cst (integer_type_node
, 0);
9646 integer_one_node
= build_int_cst (integer_type_node
, 1);
9647 integer_three_node
= build_int_cst (integer_type_node
, 3);
9648 integer_minus_one_node
= build_int_cst (integer_type_node
, -1);
9650 size_zero_node
= size_int (0);
9651 size_one_node
= size_int (1);
9652 bitsize_zero_node
= bitsize_int (0);
9653 bitsize_one_node
= bitsize_int (1);
9654 bitsize_unit_node
= bitsize_int (BITS_PER_UNIT
);
9656 boolean_false_node
= TYPE_MIN_VALUE (boolean_type_node
);
9657 boolean_true_node
= TYPE_MAX_VALUE (boolean_type_node
);
9659 void_type_node
= make_node (VOID_TYPE
);
9660 layout_type (void_type_node
);
9662 /* We are not going to have real types in C with less than byte alignment,
9663 so we might as well not have any types that claim to have it. */
9664 TYPE_ALIGN (void_type_node
) = BITS_PER_UNIT
;
9665 TYPE_USER_ALIGN (void_type_node
) = 0;
9667 void_node
= make_node (VOID_CST
);
9668 TREE_TYPE (void_node
) = void_type_node
;
9670 null_pointer_node
= build_int_cst (build_pointer_type (void_type_node
), 0);
9671 layout_type (TREE_TYPE (null_pointer_node
));
9673 ptr_type_node
= build_pointer_type (void_type_node
);
9675 = build_pointer_type (build_type_variant (void_type_node
, 1, 0));
9676 fileptr_type_node
= ptr_type_node
;
9678 pointer_sized_int_node
= build_nonstandard_integer_type (POINTER_SIZE
, 1);
9680 float_type_node
= make_node (REAL_TYPE
);
9681 TYPE_PRECISION (float_type_node
) = FLOAT_TYPE_SIZE
;
9682 layout_type (float_type_node
);
9684 double_type_node
= make_node (REAL_TYPE
);
9686 TYPE_PRECISION (double_type_node
) = FLOAT_TYPE_SIZE
;
9688 TYPE_PRECISION (double_type_node
) = DOUBLE_TYPE_SIZE
;
9689 layout_type (double_type_node
);
9691 long_double_type_node
= make_node (REAL_TYPE
);
9692 TYPE_PRECISION (long_double_type_node
) = LONG_DOUBLE_TYPE_SIZE
;
9693 layout_type (long_double_type_node
);
9695 float_ptr_type_node
= build_pointer_type (float_type_node
);
9696 double_ptr_type_node
= build_pointer_type (double_type_node
);
9697 long_double_ptr_type_node
= build_pointer_type (long_double_type_node
);
9698 integer_ptr_type_node
= build_pointer_type (integer_type_node
);
9700 /* Fixed size integer types. */
9701 uint16_type_node
= build_nonstandard_integer_type (16, true);
9702 uint32_type_node
= build_nonstandard_integer_type (32, true);
9703 uint64_type_node
= build_nonstandard_integer_type (64, true);
9705 /* Decimal float types. */
9706 dfloat32_type_node
= make_node (REAL_TYPE
);
9707 TYPE_PRECISION (dfloat32_type_node
) = DECIMAL32_TYPE_SIZE
;
9708 layout_type (dfloat32_type_node
);
9709 SET_TYPE_MODE (dfloat32_type_node
, SDmode
);
9710 dfloat32_ptr_type_node
= build_pointer_type (dfloat32_type_node
);
9712 dfloat64_type_node
= make_node (REAL_TYPE
);
9713 TYPE_PRECISION (dfloat64_type_node
) = DECIMAL64_TYPE_SIZE
;
9714 layout_type (dfloat64_type_node
);
9715 SET_TYPE_MODE (dfloat64_type_node
, DDmode
);
9716 dfloat64_ptr_type_node
= build_pointer_type (dfloat64_type_node
);
9718 dfloat128_type_node
= make_node (REAL_TYPE
);
9719 TYPE_PRECISION (dfloat128_type_node
) = DECIMAL128_TYPE_SIZE
;
9720 layout_type (dfloat128_type_node
);
9721 SET_TYPE_MODE (dfloat128_type_node
, TDmode
);
9722 dfloat128_ptr_type_node
= build_pointer_type (dfloat128_type_node
);
9724 complex_integer_type_node
= build_complex_type (integer_type_node
);
9725 complex_float_type_node
= build_complex_type (float_type_node
);
9726 complex_double_type_node
= build_complex_type (double_type_node
);
9727 complex_long_double_type_node
= build_complex_type (long_double_type_node
);
9729 /* Make fixed-point nodes based on sat/non-sat and signed/unsigned. */
9730 #define MAKE_FIXED_TYPE_NODE(KIND,SIZE) \
9731 sat_ ## KIND ## _type_node = \
9732 make_sat_signed_ ## KIND ## _type (SIZE); \
9733 sat_unsigned_ ## KIND ## _type_node = \
9734 make_sat_unsigned_ ## KIND ## _type (SIZE); \
9735 KIND ## _type_node = make_signed_ ## KIND ## _type (SIZE); \
9736 unsigned_ ## KIND ## _type_node = \
9737 make_unsigned_ ## KIND ## _type (SIZE);
9739 #define MAKE_FIXED_TYPE_NODE_WIDTH(KIND,WIDTH,SIZE) \
9740 sat_ ## WIDTH ## KIND ## _type_node = \
9741 make_sat_signed_ ## KIND ## _type (SIZE); \
9742 sat_unsigned_ ## WIDTH ## KIND ## _type_node = \
9743 make_sat_unsigned_ ## KIND ## _type (SIZE); \
9744 WIDTH ## KIND ## _type_node = make_signed_ ## KIND ## _type (SIZE); \
9745 unsigned_ ## WIDTH ## KIND ## _type_node = \
9746 make_unsigned_ ## KIND ## _type (SIZE);
9748 /* Make fixed-point type nodes based on four different widths. */
9749 #define MAKE_FIXED_TYPE_NODE_FAMILY(N1,N2) \
9750 MAKE_FIXED_TYPE_NODE_WIDTH (N1, short_, SHORT_ ## N2 ## _TYPE_SIZE) \
9751 MAKE_FIXED_TYPE_NODE (N1, N2 ## _TYPE_SIZE) \
9752 MAKE_FIXED_TYPE_NODE_WIDTH (N1, long_, LONG_ ## N2 ## _TYPE_SIZE) \
9753 MAKE_FIXED_TYPE_NODE_WIDTH (N1, long_long_, LONG_LONG_ ## N2 ## _TYPE_SIZE)
9755 /* Make fixed-point mode nodes based on sat/non-sat and signed/unsigned. */
9756 #define MAKE_FIXED_MODE_NODE(KIND,NAME,MODE) \
9757 NAME ## _type_node = \
9758 make_or_reuse_signed_ ## KIND ## _type (GET_MODE_BITSIZE (MODE ## mode)); \
9759 u ## NAME ## _type_node = \
9760 make_or_reuse_unsigned_ ## KIND ## _type \
9761 (GET_MODE_BITSIZE (U ## MODE ## mode)); \
9762 sat_ ## NAME ## _type_node = \
9763 make_or_reuse_sat_signed_ ## KIND ## _type \
9764 (GET_MODE_BITSIZE (MODE ## mode)); \
9765 sat_u ## NAME ## _type_node = \
9766 make_or_reuse_sat_unsigned_ ## KIND ## _type \
9767 (GET_MODE_BITSIZE (U ## MODE ## mode));
9769 /* Fixed-point type and mode nodes. */
9770 MAKE_FIXED_TYPE_NODE_FAMILY (fract
, FRACT
)
9771 MAKE_FIXED_TYPE_NODE_FAMILY (accum
, ACCUM
)
9772 MAKE_FIXED_MODE_NODE (fract
, qq
, QQ
)
9773 MAKE_FIXED_MODE_NODE (fract
, hq
, HQ
)
9774 MAKE_FIXED_MODE_NODE (fract
, sq
, SQ
)
9775 MAKE_FIXED_MODE_NODE (fract
, dq
, DQ
)
9776 MAKE_FIXED_MODE_NODE (fract
, tq
, TQ
)
9777 MAKE_FIXED_MODE_NODE (accum
, ha
, HA
)
9778 MAKE_FIXED_MODE_NODE (accum
, sa
, SA
)
9779 MAKE_FIXED_MODE_NODE (accum
, da
, DA
)
9780 MAKE_FIXED_MODE_NODE (accum
, ta
, TA
)
9783 tree t
= targetm
.build_builtin_va_list ();
9785 /* Many back-ends define record types without setting TYPE_NAME.
9786 If we copied the record type here, we'd keep the original
9787 record type without a name. This breaks name mangling. So,
9788 don't copy record types and let c_common_nodes_and_builtins()
9789 declare the type to be __builtin_va_list. */
9790 if (TREE_CODE (t
) != RECORD_TYPE
)
9791 t
= build_variant_type_copy (t
);
9793 va_list_type_node
= t
;
9797 /* Modify DECL for given flags.
9798 TM_PURE attribute is set only on types, so the function will modify
9799 DECL's type when ECF_TM_PURE is used. */
9802 set_call_expr_flags (tree decl
, int flags
)
9804 if (flags
& ECF_NOTHROW
)
9805 TREE_NOTHROW (decl
) = 1;
9806 if (flags
& ECF_CONST
)
9807 TREE_READONLY (decl
) = 1;
9808 if (flags
& ECF_PURE
)
9809 DECL_PURE_P (decl
) = 1;
9810 if (flags
& ECF_LOOPING_CONST_OR_PURE
)
9811 DECL_LOOPING_CONST_OR_PURE_P (decl
) = 1;
9812 if (flags
& ECF_NOVOPS
)
9813 DECL_IS_NOVOPS (decl
) = 1;
9814 if (flags
& ECF_NORETURN
)
9815 TREE_THIS_VOLATILE (decl
) = 1;
9816 if (flags
& ECF_MALLOC
)
9817 DECL_IS_MALLOC (decl
) = 1;
9818 if (flags
& ECF_RETURNS_TWICE
)
9819 DECL_IS_RETURNS_TWICE (decl
) = 1;
9820 if (flags
& ECF_LEAF
)
9821 DECL_ATTRIBUTES (decl
) = tree_cons (get_identifier ("leaf"),
9822 NULL
, DECL_ATTRIBUTES (decl
));
9823 if ((flags
& ECF_TM_PURE
) && flag_tm
)
9824 apply_tm_attr (decl
, get_identifier ("transaction_pure"));
9825 /* Looping const or pure is implied by noreturn.
9826 There is currently no way to declare looping const or looping pure alone. */
9827 gcc_assert (!(flags
& ECF_LOOPING_CONST_OR_PURE
)
9828 || ((flags
& ECF_NORETURN
) && (flags
& (ECF_CONST
| ECF_PURE
))));
9832 /* A subroutine of build_common_builtin_nodes. Define a builtin function. */
9835 local_define_builtin (const char *name
, tree type
, enum built_in_function code
,
9836 const char *library_name
, int ecf_flags
)
9840 decl
= add_builtin_function (name
, type
, code
, BUILT_IN_NORMAL
,
9841 library_name
, NULL_TREE
);
9842 set_call_expr_flags (decl
, ecf_flags
);
9844 set_builtin_decl (code
, decl
, true);
9847 /* Call this function after instantiating all builtins that the language
9848 front end cares about. This will build the rest of the builtins
9849 and internal functions that are relied upon by the tree optimizers and
9853 build_common_builtin_nodes (void)
9858 if (!builtin_decl_explicit_p (BUILT_IN_UNREACHABLE
))
9860 ftype
= build_function_type (void_type_node
, void_list_node
);
9861 local_define_builtin ("__builtin_unreachable", ftype
, BUILT_IN_UNREACHABLE
,
9862 "__builtin_unreachable",
9863 ECF_NOTHROW
| ECF_LEAF
| ECF_NORETURN
9864 | ECF_CONST
| ECF_LEAF
);
9867 if (!builtin_decl_explicit_p (BUILT_IN_MEMCPY
)
9868 || !builtin_decl_explicit_p (BUILT_IN_MEMMOVE
))
9870 ftype
= build_function_type_list (ptr_type_node
,
9871 ptr_type_node
, const_ptr_type_node
,
9872 size_type_node
, NULL_TREE
);
9874 if (!builtin_decl_explicit_p (BUILT_IN_MEMCPY
))
9875 local_define_builtin ("__builtin_memcpy", ftype
, BUILT_IN_MEMCPY
,
9876 "memcpy", ECF_NOTHROW
| ECF_LEAF
);
9877 if (!builtin_decl_explicit_p (BUILT_IN_MEMMOVE
))
9878 local_define_builtin ("__builtin_memmove", ftype
, BUILT_IN_MEMMOVE
,
9879 "memmove", ECF_NOTHROW
| ECF_LEAF
);
9882 if (!builtin_decl_explicit_p (BUILT_IN_MEMCMP
))
9884 ftype
= build_function_type_list (integer_type_node
, const_ptr_type_node
,
9885 const_ptr_type_node
, size_type_node
,
9887 local_define_builtin ("__builtin_memcmp", ftype
, BUILT_IN_MEMCMP
,
9888 "memcmp", ECF_PURE
| ECF_NOTHROW
| ECF_LEAF
);
9891 if (!builtin_decl_explicit_p (BUILT_IN_MEMSET
))
9893 ftype
= build_function_type_list (ptr_type_node
,
9894 ptr_type_node
, integer_type_node
,
9895 size_type_node
, NULL_TREE
);
9896 local_define_builtin ("__builtin_memset", ftype
, BUILT_IN_MEMSET
,
9897 "memset", ECF_NOTHROW
| ECF_LEAF
);
9900 if (!builtin_decl_explicit_p (BUILT_IN_ALLOCA
))
9902 ftype
= build_function_type_list (ptr_type_node
,
9903 size_type_node
, NULL_TREE
);
9904 local_define_builtin ("__builtin_alloca", ftype
, BUILT_IN_ALLOCA
,
9905 "alloca", ECF_MALLOC
| ECF_NOTHROW
| ECF_LEAF
);
9908 ftype
= build_function_type_list (ptr_type_node
, size_type_node
,
9909 size_type_node
, NULL_TREE
);
9910 local_define_builtin ("__builtin_alloca_with_align", ftype
,
9911 BUILT_IN_ALLOCA_WITH_ALIGN
, "alloca",
9912 ECF_MALLOC
| ECF_NOTHROW
| ECF_LEAF
);
9914 /* If we're checking the stack, `alloca' can throw. */
9915 if (flag_stack_check
)
9917 TREE_NOTHROW (builtin_decl_explicit (BUILT_IN_ALLOCA
)) = 0;
9918 TREE_NOTHROW (builtin_decl_explicit (BUILT_IN_ALLOCA_WITH_ALIGN
)) = 0;
9921 ftype
= build_function_type_list (void_type_node
,
9922 ptr_type_node
, ptr_type_node
,
9923 ptr_type_node
, NULL_TREE
);
9924 local_define_builtin ("__builtin_init_trampoline", ftype
,
9925 BUILT_IN_INIT_TRAMPOLINE
,
9926 "__builtin_init_trampoline", ECF_NOTHROW
| ECF_LEAF
);
9927 local_define_builtin ("__builtin_init_heap_trampoline", ftype
,
9928 BUILT_IN_INIT_HEAP_TRAMPOLINE
,
9929 "__builtin_init_heap_trampoline",
9930 ECF_NOTHROW
| ECF_LEAF
);
9932 ftype
= build_function_type_list (ptr_type_node
, ptr_type_node
, NULL_TREE
);
9933 local_define_builtin ("__builtin_adjust_trampoline", ftype
,
9934 BUILT_IN_ADJUST_TRAMPOLINE
,
9935 "__builtin_adjust_trampoline",
9936 ECF_CONST
| ECF_NOTHROW
);
9938 ftype
= build_function_type_list (void_type_node
,
9939 ptr_type_node
, ptr_type_node
, NULL_TREE
);
9940 local_define_builtin ("__builtin_nonlocal_goto", ftype
,
9941 BUILT_IN_NONLOCAL_GOTO
,
9942 "__builtin_nonlocal_goto",
9943 ECF_NORETURN
| ECF_NOTHROW
);
9945 ftype
= build_function_type_list (void_type_node
,
9946 ptr_type_node
, ptr_type_node
, NULL_TREE
);
9947 local_define_builtin ("__builtin_setjmp_setup", ftype
,
9948 BUILT_IN_SETJMP_SETUP
,
9949 "__builtin_setjmp_setup", ECF_NOTHROW
);
9951 ftype
= build_function_type_list (void_type_node
, ptr_type_node
, NULL_TREE
);
9952 local_define_builtin ("__builtin_setjmp_receiver", ftype
,
9953 BUILT_IN_SETJMP_RECEIVER
,
9954 "__builtin_setjmp_receiver", ECF_NOTHROW
| ECF_LEAF
);
9956 ftype
= build_function_type_list (ptr_type_node
, NULL_TREE
);
9957 local_define_builtin ("__builtin_stack_save", ftype
, BUILT_IN_STACK_SAVE
,
9958 "__builtin_stack_save", ECF_NOTHROW
| ECF_LEAF
);
9960 ftype
= build_function_type_list (void_type_node
, ptr_type_node
, NULL_TREE
);
9961 local_define_builtin ("__builtin_stack_restore", ftype
,
9962 BUILT_IN_STACK_RESTORE
,
9963 "__builtin_stack_restore", ECF_NOTHROW
| ECF_LEAF
);
9965 /* If there's a possibility that we might use the ARM EABI, build the
9966 alternate __cxa_end_cleanup node used to resume from C++ and Java. */
9967 if (targetm
.arm_eabi_unwinder
)
9969 ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
9970 local_define_builtin ("__builtin_cxa_end_cleanup", ftype
,
9971 BUILT_IN_CXA_END_CLEANUP
,
9972 "__cxa_end_cleanup", ECF_NORETURN
| ECF_LEAF
);
9975 ftype
= build_function_type_list (void_type_node
, ptr_type_node
, NULL_TREE
);
9976 local_define_builtin ("__builtin_unwind_resume", ftype
,
9977 BUILT_IN_UNWIND_RESUME
,
9978 ((targetm_common
.except_unwind_info (&global_options
)
9980 ? "_Unwind_SjLj_Resume" : "_Unwind_Resume"),
9983 if (builtin_decl_explicit (BUILT_IN_RETURN_ADDRESS
) == NULL_TREE
)
9985 ftype
= build_function_type_list (ptr_type_node
, integer_type_node
,
9987 local_define_builtin ("__builtin_return_address", ftype
,
9988 BUILT_IN_RETURN_ADDRESS
,
9989 "__builtin_return_address",
9993 if (!builtin_decl_explicit_p (BUILT_IN_PROFILE_FUNC_ENTER
)
9994 || !builtin_decl_explicit_p (BUILT_IN_PROFILE_FUNC_EXIT
))
9996 ftype
= build_function_type_list (void_type_node
, ptr_type_node
,
9997 ptr_type_node
, NULL_TREE
);
9998 if (!builtin_decl_explicit_p (BUILT_IN_PROFILE_FUNC_ENTER
))
9999 local_define_builtin ("__cyg_profile_func_enter", ftype
,
10000 BUILT_IN_PROFILE_FUNC_ENTER
,
10001 "__cyg_profile_func_enter", 0);
10002 if (!builtin_decl_explicit_p (BUILT_IN_PROFILE_FUNC_EXIT
))
10003 local_define_builtin ("__cyg_profile_func_exit", ftype
,
10004 BUILT_IN_PROFILE_FUNC_EXIT
,
10005 "__cyg_profile_func_exit", 0);
10008 /* The exception object and filter values from the runtime. The argument
10009 must be zero before exception lowering, i.e. from the front end. After
10010 exception lowering, it will be the region number for the exception
10011 landing pad. These functions are PURE instead of CONST to prevent
10012 them from being hoisted past the exception edge that will initialize
10013 its value in the landing pad. */
10014 ftype
= build_function_type_list (ptr_type_node
,
10015 integer_type_node
, NULL_TREE
);
10016 ecf_flags
= ECF_PURE
| ECF_NOTHROW
| ECF_LEAF
;
10017 /* Only use TM_PURE if we we have TM language support. */
10018 if (builtin_decl_explicit_p (BUILT_IN_TM_LOAD_1
))
10019 ecf_flags
|= ECF_TM_PURE
;
10020 local_define_builtin ("__builtin_eh_pointer", ftype
, BUILT_IN_EH_POINTER
,
10021 "__builtin_eh_pointer", ecf_flags
);
10023 tmp
= lang_hooks
.types
.type_for_mode (targetm
.eh_return_filter_mode (), 0);
10024 ftype
= build_function_type_list (tmp
, integer_type_node
, NULL_TREE
);
10025 local_define_builtin ("__builtin_eh_filter", ftype
, BUILT_IN_EH_FILTER
,
10026 "__builtin_eh_filter", ECF_PURE
| ECF_NOTHROW
| ECF_LEAF
);
10028 ftype
= build_function_type_list (void_type_node
,
10029 integer_type_node
, integer_type_node
,
10031 local_define_builtin ("__builtin_eh_copy_values", ftype
,
10032 BUILT_IN_EH_COPY_VALUES
,
10033 "__builtin_eh_copy_values", ECF_NOTHROW
);
10035 /* Complex multiplication and division. These are handled as builtins
10036 rather than optabs because emit_library_call_value doesn't support
10037 complex. Further, we can do slightly better with folding these
10038 beasties if the real and complex parts of the arguments are separate. */
10042 for (mode
= MIN_MODE_COMPLEX_FLOAT
; mode
<= MAX_MODE_COMPLEX_FLOAT
; ++mode
)
10044 char mode_name_buf
[4], *q
;
10046 enum built_in_function mcode
, dcode
;
10047 tree type
, inner_type
;
10048 const char *prefix
= "__";
10050 if (targetm
.libfunc_gnu_prefix
)
10053 type
= lang_hooks
.types
.type_for_mode ((enum machine_mode
) mode
, 0);
10056 inner_type
= TREE_TYPE (type
);
10058 ftype
= build_function_type_list (type
, inner_type
, inner_type
,
10059 inner_type
, inner_type
, NULL_TREE
);
10061 mcode
= ((enum built_in_function
)
10062 (BUILT_IN_COMPLEX_MUL_MIN
+ mode
- MIN_MODE_COMPLEX_FLOAT
));
10063 dcode
= ((enum built_in_function
)
10064 (BUILT_IN_COMPLEX_DIV_MIN
+ mode
- MIN_MODE_COMPLEX_FLOAT
));
10066 for (p
= GET_MODE_NAME (mode
), q
= mode_name_buf
; *p
; p
++, q
++)
10070 built_in_names
[mcode
] = concat (prefix
, "mul", mode_name_buf
, "3",
10072 local_define_builtin (built_in_names
[mcode
], ftype
, mcode
,
10073 built_in_names
[mcode
],
10074 ECF_CONST
| ECF_NOTHROW
| ECF_LEAF
);
10076 built_in_names
[dcode
] = concat (prefix
, "div", mode_name_buf
, "3",
10078 local_define_builtin (built_in_names
[dcode
], ftype
, dcode
,
10079 built_in_names
[dcode
],
10080 ECF_CONST
| ECF_NOTHROW
| ECF_LEAF
);
10084 init_internal_fns ();
10087 /* HACK. GROSS. This is absolutely disgusting. I wish there was a
10090 If we requested a pointer to a vector, build up the pointers that
10091 we stripped off while looking for the inner type. Similarly for
10092 return values from functions.
10094 The argument TYPE is the top of the chain, and BOTTOM is the
10095 new type which we will point to. */
10098 reconstruct_complex_type (tree type
, tree bottom
)
10102 if (TREE_CODE (type
) == POINTER_TYPE
)
10104 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
10105 outer
= build_pointer_type_for_mode (inner
, TYPE_MODE (type
),
10106 TYPE_REF_CAN_ALIAS_ALL (type
));
10108 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10110 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
10111 outer
= build_reference_type_for_mode (inner
, TYPE_MODE (type
),
10112 TYPE_REF_CAN_ALIAS_ALL (type
));
10114 else if (TREE_CODE (type
) == ARRAY_TYPE
)
10116 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
10117 outer
= build_array_type (inner
, TYPE_DOMAIN (type
));
10119 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10121 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
10122 outer
= build_function_type (inner
, TYPE_ARG_TYPES (type
));
10124 else if (TREE_CODE (type
) == METHOD_TYPE
)
10126 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
10127 /* The build_method_type_directly() routine prepends 'this' to argument list,
10128 so we must compensate by getting rid of it. */
10130 = build_method_type_directly
10131 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (type
))),
10133 TREE_CHAIN (TYPE_ARG_TYPES (type
)));
10135 else if (TREE_CODE (type
) == OFFSET_TYPE
)
10137 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
10138 outer
= build_offset_type (TYPE_OFFSET_BASETYPE (type
), inner
);
10143 return build_type_attribute_qual_variant (outer
, TYPE_ATTRIBUTES (type
),
10144 TYPE_QUALS (type
));
10147 /* Returns a vector tree node given a mode (integer, vector, or BLKmode) and
10150 build_vector_type_for_mode (tree innertype
, enum machine_mode mode
)
10154 switch (GET_MODE_CLASS (mode
))
10156 case MODE_VECTOR_INT
:
10157 case MODE_VECTOR_FLOAT
:
10158 case MODE_VECTOR_FRACT
:
10159 case MODE_VECTOR_UFRACT
:
10160 case MODE_VECTOR_ACCUM
:
10161 case MODE_VECTOR_UACCUM
:
10162 nunits
= GET_MODE_NUNITS (mode
);
10166 /* Check that there are no leftover bits. */
10167 gcc_assert (GET_MODE_BITSIZE (mode
)
10168 % TREE_INT_CST_LOW (TYPE_SIZE (innertype
)) == 0);
10170 nunits
= GET_MODE_BITSIZE (mode
)
10171 / TREE_INT_CST_LOW (TYPE_SIZE (innertype
));
10175 gcc_unreachable ();
10178 return make_vector_type (innertype
, nunits
, mode
);
10181 /* Similarly, but takes the inner type and number of units, which must be
10185 build_vector_type (tree innertype
, int nunits
)
10187 return make_vector_type (innertype
, nunits
, VOIDmode
);
10190 /* Similarly, but builds a variant type with TYPE_VECTOR_OPAQUE set. */
10193 build_opaque_vector_type (tree innertype
, int nunits
)
10195 tree t
= make_vector_type (innertype
, nunits
, VOIDmode
);
10197 /* We always build the non-opaque variant before the opaque one,
10198 so if it already exists, it is TYPE_NEXT_VARIANT of this one. */
10199 cand
= TYPE_NEXT_VARIANT (t
);
10201 && TYPE_VECTOR_OPAQUE (cand
)
10202 && check_qualified_type (cand
, t
, TYPE_QUALS (t
)))
10204 /* Othewise build a variant type and make sure to queue it after
10205 the non-opaque type. */
10206 cand
= build_distinct_type_copy (t
);
10207 TYPE_VECTOR_OPAQUE (cand
) = true;
10208 TYPE_CANONICAL (cand
) = TYPE_CANONICAL (t
);
10209 TYPE_NEXT_VARIANT (cand
) = TYPE_NEXT_VARIANT (t
);
10210 TYPE_NEXT_VARIANT (t
) = cand
;
10211 TYPE_MAIN_VARIANT (cand
) = TYPE_MAIN_VARIANT (t
);
10216 /* Given an initializer INIT, return TRUE if INIT is zero or some
10217 aggregate of zeros. Otherwise return FALSE. */
10219 initializer_zerop (const_tree init
)
10225 switch (TREE_CODE (init
))
10228 return integer_zerop (init
);
10231 /* ??? Note that this is not correct for C4X float formats. There,
10232 a bit pattern of all zeros is 1.0; 0.0 is encoded with the most
10233 negative exponent. */
10234 return real_zerop (init
)
10235 && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (init
));
10238 return fixed_zerop (init
);
10241 return integer_zerop (init
)
10242 || (real_zerop (init
)
10243 && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (TREE_REALPART (init
)))
10244 && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (TREE_IMAGPART (init
))));
10249 for (i
= 0; i
< VECTOR_CST_NELTS (init
); ++i
)
10250 if (!initializer_zerop (VECTOR_CST_ELT (init
, i
)))
10257 unsigned HOST_WIDE_INT idx
;
10259 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (init
), idx
, elt
)
10260 if (!initializer_zerop (elt
))
10269 /* We need to loop through all elements to handle cases like
10270 "\0" and "\0foobar". */
10271 for (i
= 0; i
< TREE_STRING_LENGTH (init
); ++i
)
10272 if (TREE_STRING_POINTER (init
)[i
] != '\0')
10283 /* Check if vector VEC consists of all the equal elements and
10284 that the number of elements corresponds to the type of VEC.
10285 The function returns first element of the vector
10286 or NULL_TREE if the vector is not uniform. */
10288 uniform_vector_p (const_tree vec
)
10293 if (vec
== NULL_TREE
)
10296 gcc_assert (VECTOR_TYPE_P (TREE_TYPE (vec
)));
10298 if (TREE_CODE (vec
) == VECTOR_CST
)
10300 first
= VECTOR_CST_ELT (vec
, 0);
10301 for (i
= 1; i
< VECTOR_CST_NELTS (vec
); ++i
)
10302 if (!operand_equal_p (first
, VECTOR_CST_ELT (vec
, i
), 0))
10308 else if (TREE_CODE (vec
) == CONSTRUCTOR
)
10310 first
= error_mark_node
;
10312 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (vec
), i
, t
)
10319 if (!operand_equal_p (first
, t
, 0))
10322 if (i
!= TYPE_VECTOR_SUBPARTS (TREE_TYPE (vec
)))
10331 /* Build an empty statement at location LOC. */
10334 build_empty_stmt (location_t loc
)
10336 tree t
= build1 (NOP_EXPR
, void_type_node
, size_zero_node
);
10337 SET_EXPR_LOCATION (t
, loc
);
10342 /* Build an OpenMP clause with code CODE. LOC is the location of the
10346 build_omp_clause (location_t loc
, enum omp_clause_code code
)
10351 length
= omp_clause_num_ops
[code
];
10352 size
= (sizeof (struct tree_omp_clause
) + (length
- 1) * sizeof (tree
));
10354 record_node_allocation_statistics (OMP_CLAUSE
, size
);
10356 t
= (tree
) ggc_internal_alloc (size
);
10357 memset (t
, 0, size
);
10358 TREE_SET_CODE (t
, OMP_CLAUSE
);
10359 OMP_CLAUSE_SET_CODE (t
, code
);
10360 OMP_CLAUSE_LOCATION (t
) = loc
;
10365 /* Build a tcc_vl_exp object with code CODE and room for LEN operands. LEN
10366 includes the implicit operand count in TREE_OPERAND 0, and so must be >= 1.
10367 Except for the CODE and operand count field, other storage for the
10368 object is initialized to zeros. */
10371 build_vl_exp_stat (enum tree_code code
, int len MEM_STAT_DECL
)
10374 int length
= (len
- 1) * sizeof (tree
) + sizeof (struct tree_exp
);
10376 gcc_assert (TREE_CODE_CLASS (code
) == tcc_vl_exp
);
10377 gcc_assert (len
>= 1);
10379 record_node_allocation_statistics (code
, length
);
10381 t
= ggc_alloc_cleared_tree_node_stat (length PASS_MEM_STAT
);
10383 TREE_SET_CODE (t
, code
);
10385 /* Can't use TREE_OPERAND to store the length because if checking is
10386 enabled, it will try to check the length before we store it. :-P */
10387 t
->exp
.operands
[0] = build_int_cst (sizetype
, len
);
10392 /* Helper function for build_call_* functions; build a CALL_EXPR with
10393 indicated RETURN_TYPE, FN, and NARGS, but do not initialize any of
10394 the argument slots. */
10397 build_call_1 (tree return_type
, tree fn
, int nargs
)
10401 t
= build_vl_exp (CALL_EXPR
, nargs
+ 3);
10402 TREE_TYPE (t
) = return_type
;
10403 CALL_EXPR_FN (t
) = fn
;
10404 CALL_EXPR_STATIC_CHAIN (t
) = NULL
;
10409 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and
10410 FN and a null static chain slot. NARGS is the number of call arguments
10411 which are specified as "..." arguments. */
10414 build_call_nary (tree return_type
, tree fn
, int nargs
, ...)
10418 va_start (args
, nargs
);
10419 ret
= build_call_valist (return_type
, fn
, nargs
, args
);
10424 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and
10425 FN and a null static chain slot. NARGS is the number of call arguments
10426 which are specified as a va_list ARGS. */
10429 build_call_valist (tree return_type
, tree fn
, int nargs
, va_list args
)
10434 t
= build_call_1 (return_type
, fn
, nargs
);
10435 for (i
= 0; i
< nargs
; i
++)
10436 CALL_EXPR_ARG (t
, i
) = va_arg (args
, tree
);
10437 process_call_operands (t
);
10441 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and
10442 FN and a null static chain slot. NARGS is the number of call arguments
10443 which are specified as a tree array ARGS. */
10446 build_call_array_loc (location_t loc
, tree return_type
, tree fn
,
10447 int nargs
, const tree
*args
)
10452 t
= build_call_1 (return_type
, fn
, nargs
);
10453 for (i
= 0; i
< nargs
; i
++)
10454 CALL_EXPR_ARG (t
, i
) = args
[i
];
10455 process_call_operands (t
);
10456 SET_EXPR_LOCATION (t
, loc
);
10460 /* Like build_call_array, but takes a vec. */
10463 build_call_vec (tree return_type
, tree fn
, vec
<tree
, va_gc
> *args
)
10468 ret
= build_call_1 (return_type
, fn
, vec_safe_length (args
));
10469 FOR_EACH_VEC_SAFE_ELT (args
, ix
, t
)
10470 CALL_EXPR_ARG (ret
, ix
) = t
;
10471 process_call_operands (ret
);
10475 /* Conveniently construct a function call expression. FNDECL names the
10476 function to be called and N arguments are passed in the array
10480 build_call_expr_loc_array (location_t loc
, tree fndecl
, int n
, tree
*argarray
)
10482 tree fntype
= TREE_TYPE (fndecl
);
10483 tree fn
= build1 (ADDR_EXPR
, build_pointer_type (fntype
), fndecl
);
10485 return fold_builtin_call_array (loc
, TREE_TYPE (fntype
), fn
, n
, argarray
);
10488 /* Conveniently construct a function call expression. FNDECL names the
10489 function to be called and the arguments are passed in the vector
10493 build_call_expr_loc_vec (location_t loc
, tree fndecl
, vec
<tree
, va_gc
> *vec
)
10495 return build_call_expr_loc_array (loc
, fndecl
, vec_safe_length (vec
),
10496 vec_safe_address (vec
));
10500 /* Conveniently construct a function call expression. FNDECL names the
10501 function to be called, N is the number of arguments, and the "..."
10502 parameters are the argument expressions. */
10505 build_call_expr_loc (location_t loc
, tree fndecl
, int n
, ...)
10508 tree
*argarray
= XALLOCAVEC (tree
, n
);
10512 for (i
= 0; i
< n
; i
++)
10513 argarray
[i
] = va_arg (ap
, tree
);
10515 return build_call_expr_loc_array (loc
, fndecl
, n
, argarray
);
10518 /* Like build_call_expr_loc (UNKNOWN_LOCATION, ...). Duplicated because
10519 varargs macros aren't supported by all bootstrap compilers. */
10522 build_call_expr (tree fndecl
, int n
, ...)
10525 tree
*argarray
= XALLOCAVEC (tree
, n
);
10529 for (i
= 0; i
< n
; i
++)
10530 argarray
[i
] = va_arg (ap
, tree
);
10532 return build_call_expr_loc_array (UNKNOWN_LOCATION
, fndecl
, n
, argarray
);
10535 /* Build internal call expression. This is just like CALL_EXPR, except
10536 its CALL_EXPR_FN is NULL. It will get gimplified later into ordinary
10537 internal function. */
10540 build_call_expr_internal_loc (location_t loc
, enum internal_fn ifn
,
10541 tree type
, int n
, ...)
10546 tree fn
= build_call_1 (type
, NULL_TREE
, n
);
10548 for (i
= 0; i
< n
; i
++)
10549 CALL_EXPR_ARG (fn
, i
) = va_arg (ap
, tree
);
10551 SET_EXPR_LOCATION (fn
, loc
);
10552 CALL_EXPR_IFN (fn
) = ifn
;
10556 /* Create a new constant string literal and return a char* pointer to it.
10557 The STRING_CST value is the LEN characters at STR. */
10559 build_string_literal (int len
, const char *str
)
10561 tree t
, elem
, index
, type
;
10563 t
= build_string (len
, str
);
10564 elem
= build_type_variant (char_type_node
, 1, 0);
10565 index
= build_index_type (size_int (len
- 1));
10566 type
= build_array_type (elem
, index
);
10567 TREE_TYPE (t
) = type
;
10568 TREE_CONSTANT (t
) = 1;
10569 TREE_READONLY (t
) = 1;
10570 TREE_STATIC (t
) = 1;
10572 type
= build_pointer_type (elem
);
10573 t
= build1 (ADDR_EXPR
, type
,
10574 build4 (ARRAY_REF
, elem
,
10575 t
, integer_zero_node
, NULL_TREE
, NULL_TREE
));
10581 /* Return true if T (assumed to be a DECL) must be assigned a memory
10585 needs_to_live_in_memory (const_tree t
)
10587 return (TREE_ADDRESSABLE (t
)
10588 || is_global_var (t
)
10589 || (TREE_CODE (t
) == RESULT_DECL
10590 && !DECL_BY_REFERENCE (t
)
10591 && aggregate_value_p (t
, current_function_decl
)));
10594 /* Return value of a constant X and sign-extend it. */
10597 int_cst_value (const_tree x
)
10599 unsigned bits
= TYPE_PRECISION (TREE_TYPE (x
));
10600 unsigned HOST_WIDE_INT val
= TREE_INT_CST_LOW (x
);
10602 /* Make sure the sign-extended value will fit in a HOST_WIDE_INT. */
10603 gcc_assert (cst_and_fits_in_hwi (x
));
10605 if (bits
< HOST_BITS_PER_WIDE_INT
)
10607 bool negative
= ((val
>> (bits
- 1)) & 1) != 0;
10609 val
|= (~(unsigned HOST_WIDE_INT
) 0) << (bits
- 1) << 1;
10611 val
&= ~((~(unsigned HOST_WIDE_INT
) 0) << (bits
- 1) << 1);
10617 /* If TYPE is an integral or pointer type, return an integer type with
10618 the same precision which is unsigned iff UNSIGNEDP is true, or itself
10619 if TYPE is already an integer type of signedness UNSIGNEDP. */
10622 signed_or_unsigned_type_for (int unsignedp
, tree type
)
10624 if (TREE_CODE (type
) == INTEGER_TYPE
&& TYPE_UNSIGNED (type
) == unsignedp
)
10627 if (TREE_CODE (type
) == VECTOR_TYPE
)
10629 tree inner
= TREE_TYPE (type
);
10630 tree inner2
= signed_or_unsigned_type_for (unsignedp
, inner
);
10633 if (inner
== inner2
)
10635 return build_vector_type (inner2
, TYPE_VECTOR_SUBPARTS (type
));
10638 if (!INTEGRAL_TYPE_P (type
)
10639 && !POINTER_TYPE_P (type
)
10640 && TREE_CODE (type
) != OFFSET_TYPE
)
10643 return build_nonstandard_integer_type (TYPE_PRECISION (type
), unsignedp
);
10646 /* If TYPE is an integral or pointer type, return an integer type with
10647 the same precision which is unsigned, or itself if TYPE is already an
10648 unsigned integer type. */
10651 unsigned_type_for (tree type
)
10653 return signed_or_unsigned_type_for (1, type
);
10656 /* If TYPE is an integral or pointer type, return an integer type with
10657 the same precision which is signed, or itself if TYPE is already a
10658 signed integer type. */
10661 signed_type_for (tree type
)
10663 return signed_or_unsigned_type_for (0, type
);
10666 /* If TYPE is a vector type, return a signed integer vector type with the
10667 same width and number of subparts. Otherwise return boolean_type_node. */
10670 truth_type_for (tree type
)
10672 if (TREE_CODE (type
) == VECTOR_TYPE
)
10674 tree elem
= lang_hooks
.types
.type_for_size
10675 (GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (type
))), 0);
10676 return build_opaque_vector_type (elem
, TYPE_VECTOR_SUBPARTS (type
));
10679 return boolean_type_node
;
10682 /* Returns the largest value obtainable by casting something in INNER type to
10686 upper_bound_in_type (tree outer
, tree inner
)
10688 unsigned int det
= 0;
10689 unsigned oprec
= TYPE_PRECISION (outer
);
10690 unsigned iprec
= TYPE_PRECISION (inner
);
10693 /* Compute a unique number for every combination. */
10694 det
|= (oprec
> iprec
) ? 4 : 0;
10695 det
|= TYPE_UNSIGNED (outer
) ? 2 : 0;
10696 det
|= TYPE_UNSIGNED (inner
) ? 1 : 0;
10698 /* Determine the exponent to use. */
10703 /* oprec <= iprec, outer: signed, inner: don't care. */
10708 /* oprec <= iprec, outer: unsigned, inner: don't care. */
10712 /* oprec > iprec, outer: signed, inner: signed. */
10716 /* oprec > iprec, outer: signed, inner: unsigned. */
10720 /* oprec > iprec, outer: unsigned, inner: signed. */
10724 /* oprec > iprec, outer: unsigned, inner: unsigned. */
10728 gcc_unreachable ();
10731 return wide_int_to_tree (outer
,
10732 wi::mask (prec
, false, TYPE_PRECISION (outer
)));
10735 /* Returns the smallest value obtainable by casting something in INNER type to
10739 lower_bound_in_type (tree outer
, tree inner
)
10741 unsigned oprec
= TYPE_PRECISION (outer
);
10742 unsigned iprec
= TYPE_PRECISION (inner
);
10744 /* If OUTER type is unsigned, we can definitely cast 0 to OUTER type
10746 if (TYPE_UNSIGNED (outer
)
10747 /* If we are widening something of an unsigned type, OUTER type
10748 contains all values of INNER type. In particular, both INNER
10749 and OUTER types have zero in common. */
10750 || (oprec
> iprec
&& TYPE_UNSIGNED (inner
)))
10751 return build_int_cst (outer
, 0);
10754 /* If we are widening a signed type to another signed type, we
10755 want to obtain -2^^(iprec-1). If we are keeping the
10756 precision or narrowing to a signed type, we want to obtain
10758 unsigned prec
= oprec
> iprec
? iprec
: oprec
;
10759 return wide_int_to_tree (outer
,
10760 wi::mask (prec
- 1, true,
10761 TYPE_PRECISION (outer
)));
10765 /* Return nonzero if two operands that are suitable for PHI nodes are
10766 necessarily equal. Specifically, both ARG0 and ARG1 must be either
10767 SSA_NAME or invariant. Note that this is strictly an optimization.
10768 That is, callers of this function can directly call operand_equal_p
10769 and get the same result, only slower. */
10772 operand_equal_for_phi_arg_p (const_tree arg0
, const_tree arg1
)
10776 if (TREE_CODE (arg0
) == SSA_NAME
|| TREE_CODE (arg1
) == SSA_NAME
)
10778 return operand_equal_p (arg0
, arg1
, 0);
10781 /* Returns number of zeros at the end of binary representation of X. */
10784 num_ending_zeros (const_tree x
)
10786 return build_int_cst (TREE_TYPE (x
), wi::ctz (x
));
10790 #define WALK_SUBTREE(NODE) \
10793 result = walk_tree_1 (&(NODE), func, data, pset, lh); \
10799 /* This is a subroutine of walk_tree that walks field of TYPE that are to
10800 be walked whenever a type is seen in the tree. Rest of operands and return
10801 value are as for walk_tree. */
10804 walk_type_fields (tree type
, walk_tree_fn func
, void *data
,
10805 hash_set
<tree
> *pset
, walk_tree_lh lh
)
10807 tree result
= NULL_TREE
;
10809 switch (TREE_CODE (type
))
10812 case REFERENCE_TYPE
:
10814 /* We have to worry about mutually recursive pointers. These can't
10815 be written in C. They can in Ada. It's pathological, but
10816 there's an ACATS test (c38102a) that checks it. Deal with this
10817 by checking if we're pointing to another pointer, that one
10818 points to another pointer, that one does too, and we have no htab.
10819 If so, get a hash table. We check three levels deep to avoid
10820 the cost of the hash table if we don't need one. */
10821 if (POINTER_TYPE_P (TREE_TYPE (type
))
10822 && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (type
)))
10823 && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (TREE_TYPE (type
))))
10826 result
= walk_tree_without_duplicates (&TREE_TYPE (type
),
10834 /* ... fall through ... */
10837 WALK_SUBTREE (TREE_TYPE (type
));
10841 WALK_SUBTREE (TYPE_METHOD_BASETYPE (type
));
10843 /* Fall through. */
10845 case FUNCTION_TYPE
:
10846 WALK_SUBTREE (TREE_TYPE (type
));
10850 /* We never want to walk into default arguments. */
10851 for (arg
= TYPE_ARG_TYPES (type
); arg
; arg
= TREE_CHAIN (arg
))
10852 WALK_SUBTREE (TREE_VALUE (arg
));
10857 /* Don't follow this nodes's type if a pointer for fear that
10858 we'll have infinite recursion. If we have a PSET, then we
10861 || (!POINTER_TYPE_P (TREE_TYPE (type
))
10862 && TREE_CODE (TREE_TYPE (type
)) != OFFSET_TYPE
))
10863 WALK_SUBTREE (TREE_TYPE (type
));
10864 WALK_SUBTREE (TYPE_DOMAIN (type
));
10868 WALK_SUBTREE (TREE_TYPE (type
));
10869 WALK_SUBTREE (TYPE_OFFSET_BASETYPE (type
));
10879 /* Apply FUNC to all the sub-trees of TP in a pre-order traversal. FUNC is
10880 called with the DATA and the address of each sub-tree. If FUNC returns a
10881 non-NULL value, the traversal is stopped, and the value returned by FUNC
10882 is returned. If PSET is non-NULL it is used to record the nodes visited,
10883 and to avoid visiting a node more than once. */
10886 walk_tree_1 (tree
*tp
, walk_tree_fn func
, void *data
,
10887 hash_set
<tree
> *pset
, walk_tree_lh lh
)
10889 enum tree_code code
;
10893 #define WALK_SUBTREE_TAIL(NODE) \
10897 goto tail_recurse; \
10902 /* Skip empty subtrees. */
10906 /* Don't walk the same tree twice, if the user has requested
10907 that we avoid doing so. */
10908 if (pset
&& pset
->add (*tp
))
10911 /* Call the function. */
10913 result
= (*func
) (tp
, &walk_subtrees
, data
);
10915 /* If we found something, return it. */
10919 code
= TREE_CODE (*tp
);
10921 /* Even if we didn't, FUNC may have decided that there was nothing
10922 interesting below this point in the tree. */
10923 if (!walk_subtrees
)
10925 /* But we still need to check our siblings. */
10926 if (code
== TREE_LIST
)
10927 WALK_SUBTREE_TAIL (TREE_CHAIN (*tp
));
10928 else if (code
== OMP_CLAUSE
)
10929 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
10936 result
= (*lh
) (tp
, &walk_subtrees
, func
, data
, pset
);
10937 if (result
|| !walk_subtrees
)
10944 case IDENTIFIER_NODE
:
10951 case PLACEHOLDER_EXPR
:
10955 /* None of these have subtrees other than those already walked
10960 WALK_SUBTREE (TREE_VALUE (*tp
));
10961 WALK_SUBTREE_TAIL (TREE_CHAIN (*tp
));
10966 int len
= TREE_VEC_LENGTH (*tp
);
10971 /* Walk all elements but the first. */
10973 WALK_SUBTREE (TREE_VEC_ELT (*tp
, len
));
10975 /* Now walk the first one as a tail call. */
10976 WALK_SUBTREE_TAIL (TREE_VEC_ELT (*tp
, 0));
10980 WALK_SUBTREE (TREE_REALPART (*tp
));
10981 WALK_SUBTREE_TAIL (TREE_IMAGPART (*tp
));
10985 unsigned HOST_WIDE_INT idx
;
10986 constructor_elt
*ce
;
10988 for (idx
= 0; vec_safe_iterate (CONSTRUCTOR_ELTS (*tp
), idx
, &ce
);
10990 WALK_SUBTREE (ce
->value
);
10995 WALK_SUBTREE_TAIL (TREE_OPERAND (*tp
, 0));
11000 for (decl
= BIND_EXPR_VARS (*tp
); decl
; decl
= DECL_CHAIN (decl
))
11002 /* Walk the DECL_INITIAL and DECL_SIZE. We don't want to walk
11003 into declarations that are just mentioned, rather than
11004 declared; they don't really belong to this part of the tree.
11005 And, we can see cycles: the initializer for a declaration
11006 can refer to the declaration itself. */
11007 WALK_SUBTREE (DECL_INITIAL (decl
));
11008 WALK_SUBTREE (DECL_SIZE (decl
));
11009 WALK_SUBTREE (DECL_SIZE_UNIT (decl
));
11011 WALK_SUBTREE_TAIL (BIND_EXPR_BODY (*tp
));
11014 case STATEMENT_LIST
:
11016 tree_stmt_iterator i
;
11017 for (i
= tsi_start (*tp
); !tsi_end_p (i
); tsi_next (&i
))
11018 WALK_SUBTREE (*tsi_stmt_ptr (i
));
11023 switch (OMP_CLAUSE_CODE (*tp
))
11025 case OMP_CLAUSE_PRIVATE
:
11026 case OMP_CLAUSE_SHARED
:
11027 case OMP_CLAUSE_FIRSTPRIVATE
:
11028 case OMP_CLAUSE_COPYIN
:
11029 case OMP_CLAUSE_COPYPRIVATE
:
11030 case OMP_CLAUSE_FINAL
:
11031 case OMP_CLAUSE_IF
:
11032 case OMP_CLAUSE_NUM_THREADS
:
11033 case OMP_CLAUSE_SCHEDULE
:
11034 case OMP_CLAUSE_UNIFORM
:
11035 case OMP_CLAUSE_DEPEND
:
11036 case OMP_CLAUSE_NUM_TEAMS
:
11037 case OMP_CLAUSE_THREAD_LIMIT
:
11038 case OMP_CLAUSE_DEVICE
:
11039 case OMP_CLAUSE_DIST_SCHEDULE
:
11040 case OMP_CLAUSE_SAFELEN
:
11041 case OMP_CLAUSE_SIMDLEN
:
11042 case OMP_CLAUSE__LOOPTEMP_
:
11043 case OMP_CLAUSE__SIMDUID_
:
11044 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, 0));
11047 case OMP_CLAUSE_NOWAIT
:
11048 case OMP_CLAUSE_ORDERED
:
11049 case OMP_CLAUSE_DEFAULT
:
11050 case OMP_CLAUSE_UNTIED
:
11051 case OMP_CLAUSE_MERGEABLE
:
11052 case OMP_CLAUSE_PROC_BIND
:
11053 case OMP_CLAUSE_INBRANCH
:
11054 case OMP_CLAUSE_NOTINBRANCH
:
11055 case OMP_CLAUSE_FOR
:
11056 case OMP_CLAUSE_PARALLEL
:
11057 case OMP_CLAUSE_SECTIONS
:
11058 case OMP_CLAUSE_TASKGROUP
:
11059 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
11061 case OMP_CLAUSE_LASTPRIVATE
:
11062 WALK_SUBTREE (OMP_CLAUSE_DECL (*tp
));
11063 WALK_SUBTREE (OMP_CLAUSE_LASTPRIVATE_STMT (*tp
));
11064 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
11066 case OMP_CLAUSE_COLLAPSE
:
11069 for (i
= 0; i
< 3; i
++)
11070 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, i
));
11071 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
11074 case OMP_CLAUSE_LINEAR
:
11075 WALK_SUBTREE (OMP_CLAUSE_DECL (*tp
));
11076 WALK_SUBTREE (OMP_CLAUSE_LINEAR_STEP (*tp
));
11077 WALK_SUBTREE (OMP_CLAUSE_LINEAR_STMT (*tp
));
11078 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
11080 case OMP_CLAUSE_ALIGNED
:
11081 case OMP_CLAUSE_FROM
:
11082 case OMP_CLAUSE_TO
:
11083 case OMP_CLAUSE_MAP
:
11084 WALK_SUBTREE (OMP_CLAUSE_DECL (*tp
));
11085 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, 1));
11086 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
11088 case OMP_CLAUSE_REDUCTION
:
11091 for (i
= 0; i
< 4; i
++)
11092 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, i
));
11093 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
11097 gcc_unreachable ();
11105 /* TARGET_EXPRs are peculiar: operands 1 and 3 can be the same.
11106 But, we only want to walk once. */
11107 len
= (TREE_OPERAND (*tp
, 3) == TREE_OPERAND (*tp
, 1)) ? 2 : 3;
11108 for (i
= 0; i
< len
; ++i
)
11109 WALK_SUBTREE (TREE_OPERAND (*tp
, i
));
11110 WALK_SUBTREE_TAIL (TREE_OPERAND (*tp
, len
));
11114 /* If this is a TYPE_DECL, walk into the fields of the type that it's
11115 defining. We only want to walk into these fields of a type in this
11116 case and not in the general case of a mere reference to the type.
11118 The criterion is as follows: if the field can be an expression, it
11119 must be walked only here. This should be in keeping with the fields
11120 that are directly gimplified in gimplify_type_sizes in order for the
11121 mark/copy-if-shared/unmark machinery of the gimplifier to work with
11122 variable-sized types.
11124 Note that DECLs get walked as part of processing the BIND_EXPR. */
11125 if (TREE_CODE (DECL_EXPR_DECL (*tp
)) == TYPE_DECL
)
11127 tree
*type_p
= &TREE_TYPE (DECL_EXPR_DECL (*tp
));
11128 if (TREE_CODE (*type_p
) == ERROR_MARK
)
11131 /* Call the function for the type. See if it returns anything or
11132 doesn't want us to continue. If we are to continue, walk both
11133 the normal fields and those for the declaration case. */
11134 result
= (*func
) (type_p
, &walk_subtrees
, data
);
11135 if (result
|| !walk_subtrees
)
11138 /* But do not walk a pointed-to type since it may itself need to
11139 be walked in the declaration case if it isn't anonymous. */
11140 if (!POINTER_TYPE_P (*type_p
))
11142 result
= walk_type_fields (*type_p
, func
, data
, pset
, lh
);
11147 /* If this is a record type, also walk the fields. */
11148 if (RECORD_OR_UNION_TYPE_P (*type_p
))
11152 for (field
= TYPE_FIELDS (*type_p
); field
;
11153 field
= DECL_CHAIN (field
))
11155 /* We'd like to look at the type of the field, but we can
11156 easily get infinite recursion. So assume it's pointed
11157 to elsewhere in the tree. Also, ignore things that
11159 if (TREE_CODE (field
) != FIELD_DECL
)
11162 WALK_SUBTREE (DECL_FIELD_OFFSET (field
));
11163 WALK_SUBTREE (DECL_SIZE (field
));
11164 WALK_SUBTREE (DECL_SIZE_UNIT (field
));
11165 if (TREE_CODE (*type_p
) == QUAL_UNION_TYPE
)
11166 WALK_SUBTREE (DECL_QUALIFIER (field
));
11170 /* Same for scalar types. */
11171 else if (TREE_CODE (*type_p
) == BOOLEAN_TYPE
11172 || TREE_CODE (*type_p
) == ENUMERAL_TYPE
11173 || TREE_CODE (*type_p
) == INTEGER_TYPE
11174 || TREE_CODE (*type_p
) == FIXED_POINT_TYPE
11175 || TREE_CODE (*type_p
) == REAL_TYPE
)
11177 WALK_SUBTREE (TYPE_MIN_VALUE (*type_p
));
11178 WALK_SUBTREE (TYPE_MAX_VALUE (*type_p
));
11181 WALK_SUBTREE (TYPE_SIZE (*type_p
));
11182 WALK_SUBTREE_TAIL (TYPE_SIZE_UNIT (*type_p
));
11187 if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code
)))
11191 /* Walk over all the sub-trees of this operand. */
11192 len
= TREE_OPERAND_LENGTH (*tp
);
11194 /* Go through the subtrees. We need to do this in forward order so
11195 that the scope of a FOR_EXPR is handled properly. */
11198 for (i
= 0; i
< len
- 1; ++i
)
11199 WALK_SUBTREE (TREE_OPERAND (*tp
, i
));
11200 WALK_SUBTREE_TAIL (TREE_OPERAND (*tp
, len
- 1));
11203 /* If this is a type, walk the needed fields in the type. */
11204 else if (TYPE_P (*tp
))
11205 return walk_type_fields (*tp
, func
, data
, pset
, lh
);
11209 /* We didn't find what we were looking for. */
11212 #undef WALK_SUBTREE_TAIL
11214 #undef WALK_SUBTREE
11216 /* Like walk_tree, but does not walk duplicate nodes more than once. */
11219 walk_tree_without_duplicates_1 (tree
*tp
, walk_tree_fn func
, void *data
,
11224 hash_set
<tree
> pset
;
11225 result
= walk_tree_1 (tp
, func
, data
, &pset
, lh
);
11231 tree_block (tree t
)
11233 const enum tree_code_class c
= TREE_CODE_CLASS (TREE_CODE (t
));
11235 if (IS_EXPR_CODE_CLASS (c
))
11236 return LOCATION_BLOCK (t
->exp
.locus
);
11237 gcc_unreachable ();
11242 tree_set_block (tree t
, tree b
)
11244 const enum tree_code_class c
= TREE_CODE_CLASS (TREE_CODE (t
));
11246 if (IS_EXPR_CODE_CLASS (c
))
11249 t
->exp
.locus
= COMBINE_LOCATION_DATA (line_table
, t
->exp
.locus
, b
);
11251 t
->exp
.locus
= LOCATION_LOCUS (t
->exp
.locus
);
11254 gcc_unreachable ();
11257 /* Create a nameless artificial label and put it in the current
11258 function context. The label has a location of LOC. Returns the
11259 newly created label. */
11262 create_artificial_label (location_t loc
)
11264 tree lab
= build_decl (loc
,
11265 LABEL_DECL
, NULL_TREE
, void_type_node
);
11267 DECL_ARTIFICIAL (lab
) = 1;
11268 DECL_IGNORED_P (lab
) = 1;
11269 DECL_CONTEXT (lab
) = current_function_decl
;
11273 /* Given a tree, try to return a useful variable name that we can use
11274 to prefix a temporary that is being assigned the value of the tree.
11275 I.E. given <temp> = &A, return A. */
11280 tree stripped_decl
;
11283 STRIP_NOPS (stripped_decl
);
11284 if (DECL_P (stripped_decl
) && DECL_NAME (stripped_decl
))
11285 return IDENTIFIER_POINTER (DECL_NAME (stripped_decl
));
11286 else if (TREE_CODE (stripped_decl
) == SSA_NAME
)
11288 tree name
= SSA_NAME_IDENTIFIER (stripped_decl
);
11291 return IDENTIFIER_POINTER (name
);
11295 switch (TREE_CODE (stripped_decl
))
11298 return get_name (TREE_OPERAND (stripped_decl
, 0));
11305 /* Return true if TYPE has a variable argument list. */
11308 stdarg_p (const_tree fntype
)
11310 function_args_iterator args_iter
;
11311 tree n
= NULL_TREE
, t
;
11316 FOREACH_FUNCTION_ARGS (fntype
, t
, args_iter
)
11321 return n
!= NULL_TREE
&& n
!= void_type_node
;
11324 /* Return true if TYPE has a prototype. */
11327 prototype_p (tree fntype
)
11331 gcc_assert (fntype
!= NULL_TREE
);
11333 t
= TYPE_ARG_TYPES (fntype
);
11334 return (t
!= NULL_TREE
);
11337 /* If BLOCK is inlined from an __attribute__((__artificial__))
11338 routine, return pointer to location from where it has been
11341 block_nonartificial_location (tree block
)
11343 location_t
*ret
= NULL
;
11345 while (block
&& TREE_CODE (block
) == BLOCK
11346 && BLOCK_ABSTRACT_ORIGIN (block
))
11348 tree ao
= BLOCK_ABSTRACT_ORIGIN (block
);
11350 while (TREE_CODE (ao
) == BLOCK
11351 && BLOCK_ABSTRACT_ORIGIN (ao
)
11352 && BLOCK_ABSTRACT_ORIGIN (ao
) != ao
)
11353 ao
= BLOCK_ABSTRACT_ORIGIN (ao
);
11355 if (TREE_CODE (ao
) == FUNCTION_DECL
)
11357 /* If AO is an artificial inline, point RET to the
11358 call site locus at which it has been inlined and continue
11359 the loop, in case AO's caller is also an artificial
11361 if (DECL_DECLARED_INLINE_P (ao
)
11362 && lookup_attribute ("artificial", DECL_ATTRIBUTES (ao
)))
11363 ret
= &BLOCK_SOURCE_LOCATION (block
);
11367 else if (TREE_CODE (ao
) != BLOCK
)
11370 block
= BLOCK_SUPERCONTEXT (block
);
11376 /* If EXP is inlined from an __attribute__((__artificial__))
11377 function, return the location of the original call expression. */
11380 tree_nonartificial_location (tree exp
)
11382 location_t
*loc
= block_nonartificial_location (TREE_BLOCK (exp
));
11387 return EXPR_LOCATION (exp
);
11391 /* These are the hash table functions for the hash table of OPTIMIZATION_NODEq
11394 /* Return the hash code code X, an OPTIMIZATION_NODE or TARGET_OPTION code. */
11397 cl_option_hash_hash (const void *x
)
11399 const_tree
const t
= (const_tree
) x
;
11403 hashval_t hash
= 0;
11405 if (TREE_CODE (t
) == OPTIMIZATION_NODE
)
11407 p
= (const char *)TREE_OPTIMIZATION (t
);
11408 len
= sizeof (struct cl_optimization
);
11411 else if (TREE_CODE (t
) == TARGET_OPTION_NODE
)
11413 p
= (const char *)TREE_TARGET_OPTION (t
);
11414 len
= sizeof (struct cl_target_option
);
11418 gcc_unreachable ();
11420 /* assume most opt flags are just 0/1, some are 2-3, and a few might be
11422 for (i
= 0; i
< len
; i
++)
11424 hash
= (hash
<< 4) ^ ((i
<< 2) | p
[i
]);
11429 /* Return nonzero if the value represented by *X (an OPTIMIZATION or
11430 TARGET_OPTION tree node) is the same as that given by *Y, which is the
11434 cl_option_hash_eq (const void *x
, const void *y
)
11436 const_tree
const xt
= (const_tree
) x
;
11437 const_tree
const yt
= (const_tree
) y
;
11442 if (TREE_CODE (xt
) != TREE_CODE (yt
))
11445 if (TREE_CODE (xt
) == OPTIMIZATION_NODE
)
11447 xp
= (const char *)TREE_OPTIMIZATION (xt
);
11448 yp
= (const char *)TREE_OPTIMIZATION (yt
);
11449 len
= sizeof (struct cl_optimization
);
11452 else if (TREE_CODE (xt
) == TARGET_OPTION_NODE
)
11454 xp
= (const char *)TREE_TARGET_OPTION (xt
);
11455 yp
= (const char *)TREE_TARGET_OPTION (yt
);
11456 len
= sizeof (struct cl_target_option
);
11460 gcc_unreachable ();
11462 return (memcmp (xp
, yp
, len
) == 0);
11465 /* Build an OPTIMIZATION_NODE based on the options in OPTS. */
11468 build_optimization_node (struct gcc_options
*opts
)
11473 /* Use the cache of optimization nodes. */
11475 cl_optimization_save (TREE_OPTIMIZATION (cl_optimization_node
),
11478 slot
= htab_find_slot (cl_option_hash_table
, cl_optimization_node
, INSERT
);
11482 /* Insert this one into the hash table. */
11483 t
= cl_optimization_node
;
11486 /* Make a new node for next time round. */
11487 cl_optimization_node
= make_node (OPTIMIZATION_NODE
);
11493 /* Build a TARGET_OPTION_NODE based on the options in OPTS. */
11496 build_target_option_node (struct gcc_options
*opts
)
11501 /* Use the cache of optimization nodes. */
11503 cl_target_option_save (TREE_TARGET_OPTION (cl_target_option_node
),
11506 slot
= htab_find_slot (cl_option_hash_table
, cl_target_option_node
, INSERT
);
11510 /* Insert this one into the hash table. */
11511 t
= cl_target_option_node
;
11514 /* Make a new node for next time round. */
11515 cl_target_option_node
= make_node (TARGET_OPTION_NODE
);
11521 /* Reset TREE_TARGET_GLOBALS cache for TARGET_OPTION_NODE.
11522 Called through htab_traverse. */
11525 prepare_target_option_node_for_pch (void **slot
, void *)
11527 tree node
= (tree
) *slot
;
11528 if (TREE_CODE (node
) == TARGET_OPTION_NODE
)
11529 TREE_TARGET_GLOBALS (node
) = NULL
;
11533 /* Clear TREE_TARGET_GLOBALS of all TARGET_OPTION_NODE trees,
11534 so that they aren't saved during PCH writing. */
11537 prepare_target_option_nodes_for_pch (void)
11539 htab_traverse (cl_option_hash_table
, prepare_target_option_node_for_pch
,
11543 /* Determine the "ultimate origin" of a block. The block may be an inlined
11544 instance of an inlined instance of a block which is local to an inline
11545 function, so we have to trace all of the way back through the origin chain
11546 to find out what sort of node actually served as the original seed for the
11550 block_ultimate_origin (const_tree block
)
11552 tree immediate_origin
= BLOCK_ABSTRACT_ORIGIN (block
);
11554 /* output_inline_function sets BLOCK_ABSTRACT_ORIGIN for all the
11555 nodes in the function to point to themselves; ignore that if
11556 we're trying to output the abstract instance of this function. */
11557 if (BLOCK_ABSTRACT (block
) && immediate_origin
== block
)
11560 if (immediate_origin
== NULL_TREE
)
11565 tree lookahead
= immediate_origin
;
11569 ret_val
= lookahead
;
11570 lookahead
= (TREE_CODE (ret_val
) == BLOCK
11571 ? BLOCK_ABSTRACT_ORIGIN (ret_val
) : NULL
);
11573 while (lookahead
!= NULL
&& lookahead
!= ret_val
);
11575 /* The block's abstract origin chain may not be the *ultimate* origin of
11576 the block. It could lead to a DECL that has an abstract origin set.
11577 If so, we want that DECL's abstract origin (which is what DECL_ORIGIN
11578 will give us if it has one). Note that DECL's abstract origins are
11579 supposed to be the most distant ancestor (or so decl_ultimate_origin
11580 claims), so we don't need to loop following the DECL origins. */
11581 if (DECL_P (ret_val
))
11582 return DECL_ORIGIN (ret_val
);
11588 /* Return true iff conversion in EXP generates no instruction. Mark
11589 it inline so that we fully inline into the stripping functions even
11590 though we have two uses of this function. */
11593 tree_nop_conversion (const_tree exp
)
11595 tree outer_type
, inner_type
;
11597 if (!CONVERT_EXPR_P (exp
)
11598 && TREE_CODE (exp
) != NON_LVALUE_EXPR
)
11600 if (TREE_OPERAND (exp
, 0) == error_mark_node
)
11603 outer_type
= TREE_TYPE (exp
);
11604 inner_type
= TREE_TYPE (TREE_OPERAND (exp
, 0));
11609 /* Use precision rather then machine mode when we can, which gives
11610 the correct answer even for submode (bit-field) types. */
11611 if ((INTEGRAL_TYPE_P (outer_type
)
11612 || POINTER_TYPE_P (outer_type
)
11613 || TREE_CODE (outer_type
) == OFFSET_TYPE
)
11614 && (INTEGRAL_TYPE_P (inner_type
)
11615 || POINTER_TYPE_P (inner_type
)
11616 || TREE_CODE (inner_type
) == OFFSET_TYPE
))
11617 return TYPE_PRECISION (outer_type
) == TYPE_PRECISION (inner_type
);
11619 /* Otherwise fall back on comparing machine modes (e.g. for
11620 aggregate types, floats). */
11621 return TYPE_MODE (outer_type
) == TYPE_MODE (inner_type
);
11624 /* Return true iff conversion in EXP generates no instruction. Don't
11625 consider conversions changing the signedness. */
11628 tree_sign_nop_conversion (const_tree exp
)
11630 tree outer_type
, inner_type
;
11632 if (!tree_nop_conversion (exp
))
11635 outer_type
= TREE_TYPE (exp
);
11636 inner_type
= TREE_TYPE (TREE_OPERAND (exp
, 0));
11638 return (TYPE_UNSIGNED (outer_type
) == TYPE_UNSIGNED (inner_type
)
11639 && POINTER_TYPE_P (outer_type
) == POINTER_TYPE_P (inner_type
));
11642 /* Strip conversions from EXP according to tree_nop_conversion and
11643 return the resulting expression. */
11646 tree_strip_nop_conversions (tree exp
)
11648 while (tree_nop_conversion (exp
))
11649 exp
= TREE_OPERAND (exp
, 0);
11653 /* Strip conversions from EXP according to tree_sign_nop_conversion
11654 and return the resulting expression. */
11657 tree_strip_sign_nop_conversions (tree exp
)
11659 while (tree_sign_nop_conversion (exp
))
11660 exp
= TREE_OPERAND (exp
, 0);
11664 /* Avoid any floating point extensions from EXP. */
11666 strip_float_extensions (tree exp
)
11668 tree sub
, expt
, subt
;
11670 /* For floating point constant look up the narrowest type that can hold
11671 it properly and handle it like (type)(narrowest_type)constant.
11672 This way we can optimize for instance a=a*2.0 where "a" is float
11673 but 2.0 is double constant. */
11674 if (TREE_CODE (exp
) == REAL_CST
&& !DECIMAL_FLOAT_TYPE_P (TREE_TYPE (exp
)))
11676 REAL_VALUE_TYPE orig
;
11679 orig
= TREE_REAL_CST (exp
);
11680 if (TYPE_PRECISION (TREE_TYPE (exp
)) > TYPE_PRECISION (float_type_node
)
11681 && exact_real_truncate (TYPE_MODE (float_type_node
), &orig
))
11682 type
= float_type_node
;
11683 else if (TYPE_PRECISION (TREE_TYPE (exp
))
11684 > TYPE_PRECISION (double_type_node
)
11685 && exact_real_truncate (TYPE_MODE (double_type_node
), &orig
))
11686 type
= double_type_node
;
11688 return build_real (type
, real_value_truncate (TYPE_MODE (type
), orig
));
11691 if (!CONVERT_EXPR_P (exp
))
11694 sub
= TREE_OPERAND (exp
, 0);
11695 subt
= TREE_TYPE (sub
);
11696 expt
= TREE_TYPE (exp
);
11698 if (!FLOAT_TYPE_P (subt
))
11701 if (DECIMAL_FLOAT_TYPE_P (expt
) != DECIMAL_FLOAT_TYPE_P (subt
))
11704 if (TYPE_PRECISION (subt
) > TYPE_PRECISION (expt
))
11707 return strip_float_extensions (sub
);
11710 /* Strip out all handled components that produce invariant
11714 strip_invariant_refs (const_tree op
)
11716 while (handled_component_p (op
))
11718 switch (TREE_CODE (op
))
11721 case ARRAY_RANGE_REF
:
11722 if (!is_gimple_constant (TREE_OPERAND (op
, 1))
11723 || TREE_OPERAND (op
, 2) != NULL_TREE
11724 || TREE_OPERAND (op
, 3) != NULL_TREE
)
11728 case COMPONENT_REF
:
11729 if (TREE_OPERAND (op
, 2) != NULL_TREE
)
11735 op
= TREE_OPERAND (op
, 0);
11741 static GTY(()) tree gcc_eh_personality_decl
;
11743 /* Return the GCC personality function decl. */
11746 lhd_gcc_personality (void)
11748 if (!gcc_eh_personality_decl
)
11749 gcc_eh_personality_decl
= build_personality_function ("gcc");
11750 return gcc_eh_personality_decl
;
11753 /* TARGET is a call target of GIMPLE call statement
11754 (obtained by gimple_call_fn). Return true if it is
11755 OBJ_TYPE_REF representing an virtual call of C++ method.
11756 (As opposed to OBJ_TYPE_REF representing objc calls
11757 through a cast where middle-end devirtualization machinery
11761 virtual_method_call_p (tree target
)
11763 if (TREE_CODE (target
) != OBJ_TYPE_REF
)
11765 target
= TREE_TYPE (target
);
11766 gcc_checking_assert (TREE_CODE (target
) == POINTER_TYPE
);
11767 target
= TREE_TYPE (target
);
11768 if (TREE_CODE (target
) == FUNCTION_TYPE
)
11770 gcc_checking_assert (TREE_CODE (target
) == METHOD_TYPE
);
11774 /* REF is OBJ_TYPE_REF, return the class the ref corresponds to. */
11777 obj_type_ref_class (tree ref
)
11779 gcc_checking_assert (TREE_CODE (ref
) == OBJ_TYPE_REF
);
11780 ref
= TREE_TYPE (ref
);
11781 gcc_checking_assert (TREE_CODE (ref
) == POINTER_TYPE
);
11782 ref
= TREE_TYPE (ref
);
11783 /* We look for type THIS points to. ObjC also builds
11784 OBJ_TYPE_REF with non-method calls, Their first parameter
11785 ID however also corresponds to class type. */
11786 gcc_checking_assert (TREE_CODE (ref
) == METHOD_TYPE
11787 || TREE_CODE (ref
) == FUNCTION_TYPE
);
11788 ref
= TREE_VALUE (TYPE_ARG_TYPES (ref
));
11789 gcc_checking_assert (TREE_CODE (ref
) == POINTER_TYPE
);
11790 return TREE_TYPE (ref
);
11793 /* Return true if T is in anonymous namespace. */
11796 type_in_anonymous_namespace_p (const_tree t
)
11798 /* TREE_PUBLIC of TYPE_STUB_DECL may not be properly set for
11799 bulitin types; those have CONTEXT NULL. */
11800 if (!TYPE_CONTEXT (t
))
11802 return (TYPE_STUB_DECL (t
) && !TREE_PUBLIC (TYPE_STUB_DECL (t
)));
11805 /* Try to find a base info of BINFO that would have its field decl at offset
11806 OFFSET within the BINFO type and which is of EXPECTED_TYPE. If it can be
11807 found, return, otherwise return NULL_TREE. */
11810 get_binfo_at_offset (tree binfo
, HOST_WIDE_INT offset
, tree expected_type
)
11812 tree type
= BINFO_TYPE (binfo
);
11816 HOST_WIDE_INT pos
, size
;
11820 if (types_same_for_odr (type
, expected_type
))
11825 for (fld
= TYPE_FIELDS (type
); fld
; fld
= DECL_CHAIN (fld
))
11827 if (TREE_CODE (fld
) != FIELD_DECL
)
11830 pos
= int_bit_position (fld
);
11831 size
= tree_to_uhwi (DECL_SIZE (fld
));
11832 if (pos
<= offset
&& (pos
+ size
) > offset
)
11835 if (!fld
|| TREE_CODE (TREE_TYPE (fld
)) != RECORD_TYPE
)
11838 if (!DECL_ARTIFICIAL (fld
))
11840 binfo
= TYPE_BINFO (TREE_TYPE (fld
));
11844 /* Offset 0 indicates the primary base, whose vtable contents are
11845 represented in the binfo for the derived class. */
11846 else if (offset
!= 0)
11848 tree base_binfo
, binfo2
= binfo
;
11850 /* Find BINFO corresponding to FLD. This is bit harder
11851 by a fact that in virtual inheritance we may need to walk down
11852 the non-virtual inheritance chain. */
11855 tree containing_binfo
= NULL
, found_binfo
= NULL
;
11856 for (i
= 0; BINFO_BASE_ITERATE (binfo2
, i
, base_binfo
); i
++)
11857 if (types_same_for_odr (TREE_TYPE (base_binfo
), TREE_TYPE (fld
)))
11859 found_binfo
= base_binfo
;
11863 if ((tree_to_shwi (BINFO_OFFSET (base_binfo
))
11864 - tree_to_shwi (BINFO_OFFSET (binfo
)))
11865 * BITS_PER_UNIT
< pos
11866 /* Rule out types with no virtual methods or we can get confused
11867 here by zero sized bases. */
11868 && BINFO_VTABLE (TYPE_BINFO (BINFO_TYPE (base_binfo
)))
11869 && (!containing_binfo
11870 || (tree_to_shwi (BINFO_OFFSET (containing_binfo
))
11871 < tree_to_shwi (BINFO_OFFSET (base_binfo
)))))
11872 containing_binfo
= base_binfo
;
11875 binfo
= found_binfo
;
11878 if (!containing_binfo
)
11880 binfo2
= containing_binfo
;
11884 type
= TREE_TYPE (fld
);
11889 /* Returns true if X is a typedef decl. */
11892 is_typedef_decl (tree x
)
11894 return (x
&& TREE_CODE (x
) == TYPE_DECL
11895 && DECL_ORIGINAL_TYPE (x
) != NULL_TREE
);
11898 /* Returns true iff TYPE is a type variant created for a typedef. */
11901 typedef_variant_p (tree type
)
11903 return is_typedef_decl (TYPE_NAME (type
));
11906 /* Warn about a use of an identifier which was marked deprecated. */
11908 warn_deprecated_use (tree node
, tree attr
)
11912 if (node
== 0 || !warn_deprecated_decl
)
11918 attr
= DECL_ATTRIBUTES (node
);
11919 else if (TYPE_P (node
))
11921 tree decl
= TYPE_STUB_DECL (node
);
11923 attr
= lookup_attribute ("deprecated",
11924 TYPE_ATTRIBUTES (TREE_TYPE (decl
)));
11929 attr
= lookup_attribute ("deprecated", attr
);
11932 msg
= TREE_STRING_POINTER (TREE_VALUE (TREE_VALUE (attr
)));
11938 expanded_location xloc
= expand_location (DECL_SOURCE_LOCATION (node
));
11940 warning (OPT_Wdeprecated_declarations
,
11941 "%qD is deprecated (declared at %r%s:%d%R): %s",
11942 node
, "locus", xloc
.file
, xloc
.line
, msg
);
11944 warning (OPT_Wdeprecated_declarations
,
11945 "%qD is deprecated (declared at %r%s:%d%R)",
11946 node
, "locus", xloc
.file
, xloc
.line
);
11948 else if (TYPE_P (node
))
11950 tree what
= NULL_TREE
;
11951 tree decl
= TYPE_STUB_DECL (node
);
11953 if (TYPE_NAME (node
))
11955 if (TREE_CODE (TYPE_NAME (node
)) == IDENTIFIER_NODE
)
11956 what
= TYPE_NAME (node
);
11957 else if (TREE_CODE (TYPE_NAME (node
)) == TYPE_DECL
11958 && DECL_NAME (TYPE_NAME (node
)))
11959 what
= DECL_NAME (TYPE_NAME (node
));
11964 expanded_location xloc
11965 = expand_location (DECL_SOURCE_LOCATION (decl
));
11969 warning (OPT_Wdeprecated_declarations
,
11970 "%qE is deprecated (declared at %r%s:%d%R): %s",
11971 what
, "locus", xloc
.file
, xloc
.line
, msg
);
11973 warning (OPT_Wdeprecated_declarations
,
11974 "%qE is deprecated (declared at %r%s:%d%R)",
11975 what
, "locus", xloc
.file
, xloc
.line
);
11980 warning (OPT_Wdeprecated_declarations
,
11981 "type is deprecated (declared at %r%s:%d%R): %s",
11982 "locus", xloc
.file
, xloc
.line
, msg
);
11984 warning (OPT_Wdeprecated_declarations
,
11985 "type is deprecated (declared at %r%s:%d%R)",
11986 "locus", xloc
.file
, xloc
.line
);
11994 warning (OPT_Wdeprecated_declarations
, "%qE is deprecated: %s",
11997 warning (OPT_Wdeprecated_declarations
, "%qE is deprecated", what
);
12002 warning (OPT_Wdeprecated_declarations
, "type is deprecated: %s",
12005 warning (OPT_Wdeprecated_declarations
, "type is deprecated");
12011 /* Return true if REF has a COMPONENT_REF with a bit-field field declaration
12012 somewhere in it. */
12015 contains_bitfld_component_ref_p (const_tree ref
)
12017 while (handled_component_p (ref
))
12019 if (TREE_CODE (ref
) == COMPONENT_REF
12020 && DECL_BIT_FIELD (TREE_OPERAND (ref
, 1)))
12022 ref
= TREE_OPERAND (ref
, 0);
12028 /* Try to determine whether a TRY_CATCH expression can fall through.
12029 This is a subroutine of block_may_fallthru. */
12032 try_catch_may_fallthru (const_tree stmt
)
12034 tree_stmt_iterator i
;
12036 /* If the TRY block can fall through, the whole TRY_CATCH can
12038 if (block_may_fallthru (TREE_OPERAND (stmt
, 0)))
12041 i
= tsi_start (TREE_OPERAND (stmt
, 1));
12042 switch (TREE_CODE (tsi_stmt (i
)))
12045 /* We expect to see a sequence of CATCH_EXPR trees, each with a
12046 catch expression and a body. The whole TRY_CATCH may fall
12047 through iff any of the catch bodies falls through. */
12048 for (; !tsi_end_p (i
); tsi_next (&i
))
12050 if (block_may_fallthru (CATCH_BODY (tsi_stmt (i
))))
12055 case EH_FILTER_EXPR
:
12056 /* The exception filter expression only matters if there is an
12057 exception. If the exception does not match EH_FILTER_TYPES,
12058 we will execute EH_FILTER_FAILURE, and we will fall through
12059 if that falls through. If the exception does match
12060 EH_FILTER_TYPES, the stack unwinder will continue up the
12061 stack, so we will not fall through. We don't know whether we
12062 will throw an exception which matches EH_FILTER_TYPES or not,
12063 so we just ignore EH_FILTER_TYPES and assume that we might
12064 throw an exception which doesn't match. */
12065 return block_may_fallthru (EH_FILTER_FAILURE (tsi_stmt (i
)));
12068 /* This case represents statements to be executed when an
12069 exception occurs. Those statements are implicitly followed
12070 by a RESX statement to resume execution after the exception.
12071 So in this case the TRY_CATCH never falls through. */
12076 /* Try to determine if we can fall out of the bottom of BLOCK. This guess
12077 need not be 100% accurate; simply be conservative and return true if we
12078 don't know. This is used only to avoid stupidly generating extra code.
12079 If we're wrong, we'll just delete the extra code later. */
12082 block_may_fallthru (const_tree block
)
12084 /* This CONST_CAST is okay because expr_last returns its argument
12085 unmodified and we assign it to a const_tree. */
12086 const_tree stmt
= expr_last (CONST_CAST_TREE (block
));
12088 switch (stmt
? TREE_CODE (stmt
) : ERROR_MARK
)
12092 /* Easy cases. If the last statement of the block implies
12093 control transfer, then we can't fall through. */
12097 /* If SWITCH_LABELS is set, this is lowered, and represents a
12098 branch to a selected label and hence can not fall through.
12099 Otherwise SWITCH_BODY is set, and the switch can fall
12101 return SWITCH_LABELS (stmt
) == NULL_TREE
;
12104 if (block_may_fallthru (COND_EXPR_THEN (stmt
)))
12106 return block_may_fallthru (COND_EXPR_ELSE (stmt
));
12109 return block_may_fallthru (BIND_EXPR_BODY (stmt
));
12111 case TRY_CATCH_EXPR
:
12112 return try_catch_may_fallthru (stmt
);
12114 case TRY_FINALLY_EXPR
:
12115 /* The finally clause is always executed after the try clause,
12116 so if it does not fall through, then the try-finally will not
12117 fall through. Otherwise, if the try clause does not fall
12118 through, then when the finally clause falls through it will
12119 resume execution wherever the try clause was going. So the
12120 whole try-finally will only fall through if both the try
12121 clause and the finally clause fall through. */
12122 return (block_may_fallthru (TREE_OPERAND (stmt
, 0))
12123 && block_may_fallthru (TREE_OPERAND (stmt
, 1)));
12126 if (TREE_CODE (TREE_OPERAND (stmt
, 1)) == CALL_EXPR
)
12127 stmt
= TREE_OPERAND (stmt
, 1);
12133 /* Functions that do not return do not fall through. */
12134 return (call_expr_flags (stmt
) & ECF_NORETURN
) == 0;
12136 case CLEANUP_POINT_EXPR
:
12137 return block_may_fallthru (TREE_OPERAND (stmt
, 0));
12140 return block_may_fallthru (TREE_OPERAND (stmt
, 1));
12146 return lang_hooks
.block_may_fallthru (stmt
);
12150 /* True if we are using EH to handle cleanups. */
12151 static bool using_eh_for_cleanups_flag
= false;
12153 /* This routine is called from front ends to indicate eh should be used for
12156 using_eh_for_cleanups (void)
12158 using_eh_for_cleanups_flag
= true;
12161 /* Query whether EH is used for cleanups. */
12163 using_eh_for_cleanups_p (void)
12165 return using_eh_for_cleanups_flag
;
12168 /* Wrapper for tree_code_name to ensure that tree code is valid */
12170 get_tree_code_name (enum tree_code code
)
12172 const char *invalid
= "<invalid tree code>";
12174 if (code
>= MAX_TREE_CODES
)
12177 return tree_code_name
[code
];
12180 /* Drops the TREE_OVERFLOW flag from T. */
12183 drop_tree_overflow (tree t
)
12185 gcc_checking_assert (TREE_OVERFLOW (t
));
12187 /* For tree codes with a sharing machinery re-build the result. */
12188 if (TREE_CODE (t
) == INTEGER_CST
)
12189 return wide_int_to_tree (TREE_TYPE (t
), t
);
12191 /* Otherwise, as all tcc_constants are possibly shared, copy the node
12192 and drop the flag. */
12194 TREE_OVERFLOW (t
) = 0;
12198 /* Given a memory reference expression T, return its base address.
12199 The base address of a memory reference expression is the main
12200 object being referenced. For instance, the base address for
12201 'array[i].fld[j]' is 'array'. You can think of this as stripping
12202 away the offset part from a memory address.
12204 This function calls handled_component_p to strip away all the inner
12205 parts of the memory reference until it reaches the base object. */
12208 get_base_address (tree t
)
12210 while (handled_component_p (t
))
12211 t
= TREE_OPERAND (t
, 0);
12213 if ((TREE_CODE (t
) == MEM_REF
12214 || TREE_CODE (t
) == TARGET_MEM_REF
)
12215 && TREE_CODE (TREE_OPERAND (t
, 0)) == ADDR_EXPR
)
12216 t
= TREE_OPERAND (TREE_OPERAND (t
, 0), 0);
12218 /* ??? Either the alias oracle or all callers need to properly deal
12219 with WITH_SIZE_EXPRs before we can look through those. */
12220 if (TREE_CODE (t
) == WITH_SIZE_EXPR
)
12226 #include "gt-tree.h"