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 */
45 #include "filenames.h"
48 #include "common/common-target.h"
49 #include "langhooks.h"
50 #include "tree-inline.h"
51 #include "tree-iterator.h"
52 #include "basic-block.h"
54 #include "pointer-set.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"
79 /* Tree code classes. */
81 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
82 #define END_OF_BASE_TREE_CODES tcc_exceptional,
84 const enum tree_code_class tree_code_type
[] = {
85 #include "all-tree.def"
89 #undef END_OF_BASE_TREE_CODES
91 /* Table indexed by tree code giving number of expression
92 operands beyond the fixed part of the node structure.
93 Not used for types or decls. */
95 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
96 #define END_OF_BASE_TREE_CODES 0,
98 const unsigned char tree_code_length
[] = {
99 #include "all-tree.def"
103 #undef END_OF_BASE_TREE_CODES
105 /* Names of tree components.
106 Used for printing out the tree and error messages. */
107 #define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
108 #define END_OF_BASE_TREE_CODES "@dummy",
110 static const char *const tree_code_name
[] = {
111 #include "all-tree.def"
115 #undef END_OF_BASE_TREE_CODES
117 /* Each tree code class has an associated string representation.
118 These must correspond to the tree_code_class entries. */
120 const char *const tree_code_class_strings
[] =
135 /* obstack.[ch] explicitly declined to prototype this. */
136 extern int _obstack_allocated_p (struct obstack
*h
, void *obj
);
138 /* Statistics-gathering stuff. */
140 static int tree_code_counts
[MAX_TREE_CODES
];
141 int tree_node_counts
[(int) all_kinds
];
142 int tree_node_sizes
[(int) all_kinds
];
144 /* Keep in sync with tree.h:enum tree_node_kind. */
145 static const char * const tree_node_kind_names
[] = {
164 /* Unique id for next decl created. */
165 static GTY(()) int next_decl_uid
;
166 /* Unique id for next type created. */
167 static GTY(()) int next_type_uid
= 1;
168 /* Unique id for next debug decl created. Use negative numbers,
169 to catch erroneous uses. */
170 static GTY(()) int next_debug_decl_uid
;
172 /* Since we cannot rehash a type after it is in the table, we have to
173 keep the hash code. */
175 struct GTY(()) type_hash
{
180 /* Initial size of the hash table (rounded to next prime). */
181 #define TYPE_HASH_INITIAL_SIZE 1000
183 /* Now here is the hash table. When recording a type, it is added to
184 the slot whose index is the hash code. Note that the hash table is
185 used for several kinds of types (function types, array types and
186 array index range types, for now). While all these live in the
187 same table, they are completely independent, and the hash code is
188 computed differently for each of these. */
190 static GTY ((if_marked ("type_hash_marked_p"), param_is (struct type_hash
)))
191 htab_t type_hash_table
;
193 /* Hash table and temporary node for larger integer const values. */
194 static GTY (()) tree int_cst_node
;
195 static GTY ((if_marked ("ggc_marked_p"), param_is (union tree_node
)))
196 htab_t int_cst_hash_table
;
198 /* Hash table for optimization flags and target option flags. Use the same
199 hash table for both sets of options. Nodes for building the current
200 optimization and target option nodes. The assumption is most of the time
201 the options created will already be in the hash table, so we avoid
202 allocating and freeing up a node repeatably. */
203 static GTY (()) tree cl_optimization_node
;
204 static GTY (()) tree cl_target_option_node
;
205 static GTY ((if_marked ("ggc_marked_p"), param_is (union tree_node
)))
206 htab_t cl_option_hash_table
;
208 /* General tree->tree mapping structure for use in hash tables. */
211 static GTY ((if_marked ("tree_decl_map_marked_p"), param_is (struct tree_decl_map
)))
212 htab_t debug_expr_for_decl
;
214 static GTY ((if_marked ("tree_decl_map_marked_p"), param_is (struct tree_decl_map
)))
215 htab_t value_expr_for_decl
;
217 static GTY ((if_marked ("tree_vec_map_marked_p"), param_is (struct tree_vec_map
)))
218 htab_t debug_args_for_decl
;
220 static GTY ((if_marked ("tree_priority_map_marked_p"),
221 param_is (struct tree_priority_map
)))
222 htab_t init_priority_for_decl
;
224 static void set_type_quals (tree
, int);
225 static int type_hash_eq (const void *, const void *);
226 static hashval_t
type_hash_hash (const void *);
227 static hashval_t
int_cst_hash_hash (const void *);
228 static int int_cst_hash_eq (const void *, const void *);
229 static hashval_t
cl_option_hash_hash (const void *);
230 static int cl_option_hash_eq (const void *, const void *);
231 static void print_type_hash_statistics (void);
232 static void print_debug_expr_statistics (void);
233 static void print_value_expr_statistics (void);
234 static int type_hash_marked_p (const void *);
235 static unsigned int type_hash_list (const_tree
, hashval_t
);
236 static unsigned int attribute_hash_list (const_tree
, hashval_t
);
237 static bool decls_same_for_odr (tree decl1
, tree decl2
);
239 tree global_trees
[TI_MAX
];
240 tree integer_types
[itk_none
];
242 unsigned char tree_contains_struct
[MAX_TREE_CODES
][64];
244 /* Number of operands for each OpenMP clause. */
245 unsigned const char omp_clause_num_ops
[] =
247 0, /* OMP_CLAUSE_ERROR */
248 1, /* OMP_CLAUSE_PRIVATE */
249 1, /* OMP_CLAUSE_SHARED */
250 1, /* OMP_CLAUSE_FIRSTPRIVATE */
251 2, /* OMP_CLAUSE_LASTPRIVATE */
252 4, /* OMP_CLAUSE_REDUCTION */
253 1, /* OMP_CLAUSE_COPYIN */
254 1, /* OMP_CLAUSE_COPYPRIVATE */
255 3, /* OMP_CLAUSE_LINEAR */
256 2, /* OMP_CLAUSE_ALIGNED */
257 1, /* OMP_CLAUSE_DEPEND */
258 1, /* OMP_CLAUSE_UNIFORM */
259 2, /* OMP_CLAUSE_FROM */
260 2, /* OMP_CLAUSE_TO */
261 2, /* OMP_CLAUSE_MAP */
262 1, /* OMP_CLAUSE__LOOPTEMP_ */
263 1, /* OMP_CLAUSE_IF */
264 1, /* OMP_CLAUSE_NUM_THREADS */
265 1, /* OMP_CLAUSE_SCHEDULE */
266 0, /* OMP_CLAUSE_NOWAIT */
267 0, /* OMP_CLAUSE_ORDERED */
268 0, /* OMP_CLAUSE_DEFAULT */
269 3, /* OMP_CLAUSE_COLLAPSE */
270 0, /* OMP_CLAUSE_UNTIED */
271 1, /* OMP_CLAUSE_FINAL */
272 0, /* OMP_CLAUSE_MERGEABLE */
273 1, /* OMP_CLAUSE_DEVICE */
274 1, /* OMP_CLAUSE_DIST_SCHEDULE */
275 0, /* OMP_CLAUSE_INBRANCH */
276 0, /* OMP_CLAUSE_NOTINBRANCH */
277 1, /* OMP_CLAUSE_NUM_TEAMS */
278 1, /* OMP_CLAUSE_THREAD_LIMIT */
279 0, /* OMP_CLAUSE_PROC_BIND */
280 1, /* OMP_CLAUSE_SAFELEN */
281 1, /* OMP_CLAUSE_SIMDLEN */
282 0, /* OMP_CLAUSE_FOR */
283 0, /* OMP_CLAUSE_PARALLEL */
284 0, /* OMP_CLAUSE_SECTIONS */
285 0, /* OMP_CLAUSE_TASKGROUP */
286 1, /* OMP_CLAUSE__SIMDUID_ */
289 const char * const omp_clause_code_name
[] =
334 /* Return the tree node structure used by tree code CODE. */
336 static inline enum tree_node_structure_enum
337 tree_node_structure_for_code (enum tree_code code
)
339 switch (TREE_CODE_CLASS (code
))
341 case tcc_declaration
:
346 return TS_FIELD_DECL
;
352 return TS_LABEL_DECL
;
354 return TS_RESULT_DECL
;
355 case DEBUG_EXPR_DECL
:
358 return TS_CONST_DECL
;
362 return TS_FUNCTION_DECL
;
363 case TRANSLATION_UNIT_DECL
:
364 return TS_TRANSLATION_UNIT_DECL
;
366 return TS_DECL_NON_COMMON
;
370 return TS_TYPE_NON_COMMON
;
379 default: /* tcc_constant and tcc_exceptional */
384 /* tcc_constant cases. */
385 case INTEGER_CST
: return TS_INT_CST
;
386 case REAL_CST
: return TS_REAL_CST
;
387 case FIXED_CST
: return TS_FIXED_CST
;
388 case COMPLEX_CST
: return TS_COMPLEX
;
389 case VECTOR_CST
: return TS_VECTOR
;
390 case STRING_CST
: return TS_STRING
;
391 /* tcc_exceptional cases. */
392 case ERROR_MARK
: return TS_COMMON
;
393 case IDENTIFIER_NODE
: return TS_IDENTIFIER
;
394 case TREE_LIST
: return TS_LIST
;
395 case TREE_VEC
: return TS_VEC
;
396 case SSA_NAME
: return TS_SSA_NAME
;
397 case PLACEHOLDER_EXPR
: return TS_COMMON
;
398 case STATEMENT_LIST
: return TS_STATEMENT_LIST
;
399 case BLOCK
: return TS_BLOCK
;
400 case CONSTRUCTOR
: return TS_CONSTRUCTOR
;
401 case TREE_BINFO
: return TS_BINFO
;
402 case OMP_CLAUSE
: return TS_OMP_CLAUSE
;
403 case OPTIMIZATION_NODE
: return TS_OPTIMIZATION
;
404 case TARGET_OPTION_NODE
: return TS_TARGET_OPTION
;
412 /* Initialize tree_contains_struct to describe the hierarchy of tree
416 initialize_tree_contains_struct (void)
420 for (i
= ERROR_MARK
; i
< LAST_AND_UNUSED_TREE_CODE
; i
++)
423 enum tree_node_structure_enum ts_code
;
425 code
= (enum tree_code
) i
;
426 ts_code
= tree_node_structure_for_code (code
);
428 /* Mark the TS structure itself. */
429 tree_contains_struct
[code
][ts_code
] = 1;
431 /* Mark all the structures that TS is derived from. */
449 case TS_STATEMENT_LIST
:
450 MARK_TS_TYPED (code
);
454 case TS_DECL_MINIMAL
:
460 case TS_OPTIMIZATION
:
461 case TS_TARGET_OPTION
:
462 MARK_TS_COMMON (code
);
465 case TS_TYPE_WITH_LANG_SPECIFIC
:
466 MARK_TS_TYPE_COMMON (code
);
469 case TS_TYPE_NON_COMMON
:
470 MARK_TS_TYPE_WITH_LANG_SPECIFIC (code
);
474 MARK_TS_DECL_MINIMAL (code
);
479 MARK_TS_DECL_COMMON (code
);
482 case TS_DECL_NON_COMMON
:
483 MARK_TS_DECL_WITH_VIS (code
);
486 case TS_DECL_WITH_VIS
:
490 MARK_TS_DECL_WRTL (code
);
494 MARK_TS_DECL_COMMON (code
);
498 MARK_TS_DECL_WITH_VIS (code
);
502 case TS_FUNCTION_DECL
:
503 MARK_TS_DECL_NON_COMMON (code
);
506 case TS_TRANSLATION_UNIT_DECL
:
507 MARK_TS_DECL_COMMON (code
);
515 /* Basic consistency checks for attributes used in fold. */
516 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_NON_COMMON
]);
517 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_NON_COMMON
]);
518 gcc_assert (tree_contains_struct
[CONST_DECL
][TS_DECL_COMMON
]);
519 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_COMMON
]);
520 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_DECL_COMMON
]);
521 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_DECL_COMMON
]);
522 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_COMMON
]);
523 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_COMMON
]);
524 gcc_assert (tree_contains_struct
[TRANSLATION_UNIT_DECL
][TS_DECL_COMMON
]);
525 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_DECL_COMMON
]);
526 gcc_assert (tree_contains_struct
[FIELD_DECL
][TS_DECL_COMMON
]);
527 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_WRTL
]);
528 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_DECL_WRTL
]);
529 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_DECL_WRTL
]);
530 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_WRTL
]);
531 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_DECL_WRTL
]);
532 gcc_assert (tree_contains_struct
[CONST_DECL
][TS_DECL_MINIMAL
]);
533 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_MINIMAL
]);
534 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_DECL_MINIMAL
]);
535 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_DECL_MINIMAL
]);
536 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_MINIMAL
]);
537 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_MINIMAL
]);
538 gcc_assert (tree_contains_struct
[TRANSLATION_UNIT_DECL
][TS_DECL_MINIMAL
]);
539 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_DECL_MINIMAL
]);
540 gcc_assert (tree_contains_struct
[FIELD_DECL
][TS_DECL_MINIMAL
]);
541 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_WITH_VIS
]);
542 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_WITH_VIS
]);
543 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_WITH_VIS
]);
544 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_VAR_DECL
]);
545 gcc_assert (tree_contains_struct
[FIELD_DECL
][TS_FIELD_DECL
]);
546 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_PARM_DECL
]);
547 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_LABEL_DECL
]);
548 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_RESULT_DECL
]);
549 gcc_assert (tree_contains_struct
[CONST_DECL
][TS_CONST_DECL
]);
550 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_TYPE_DECL
]);
551 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_FUNCTION_DECL
]);
552 gcc_assert (tree_contains_struct
[IMPORTED_DECL
][TS_DECL_MINIMAL
]);
553 gcc_assert (tree_contains_struct
[IMPORTED_DECL
][TS_DECL_COMMON
]);
554 gcc_assert (tree_contains_struct
[NAMELIST_DECL
][TS_DECL_MINIMAL
]);
555 gcc_assert (tree_contains_struct
[NAMELIST_DECL
][TS_DECL_COMMON
]);
564 /* Initialize the hash table of types. */
565 type_hash_table
= htab_create_ggc (TYPE_HASH_INITIAL_SIZE
, type_hash_hash
,
568 debug_expr_for_decl
= htab_create_ggc (512, tree_decl_map_hash
,
569 tree_decl_map_eq
, 0);
571 value_expr_for_decl
= htab_create_ggc (512, tree_decl_map_hash
,
572 tree_decl_map_eq
, 0);
573 init_priority_for_decl
= htab_create_ggc (512, tree_priority_map_hash
,
574 tree_priority_map_eq
, 0);
576 int_cst_hash_table
= htab_create_ggc (1024, int_cst_hash_hash
,
577 int_cst_hash_eq
, NULL
);
579 int_cst_node
= make_node (INTEGER_CST
);
581 cl_option_hash_table
= htab_create_ggc (64, cl_option_hash_hash
,
582 cl_option_hash_eq
, NULL
);
584 cl_optimization_node
= make_node (OPTIMIZATION_NODE
);
585 cl_target_option_node
= make_node (TARGET_OPTION_NODE
);
587 /* Initialize the tree_contains_struct array. */
588 initialize_tree_contains_struct ();
589 lang_hooks
.init_ts ();
593 /* The name of the object as the assembler will see it (but before any
594 translations made by ASM_OUTPUT_LABELREF). Often this is the same
595 as DECL_NAME. It is an IDENTIFIER_NODE. */
597 decl_assembler_name (tree decl
)
599 if (!DECL_ASSEMBLER_NAME_SET_P (decl
))
600 lang_hooks
.set_decl_assembler_name (decl
);
601 return DECL_WITH_VIS_CHECK (decl
)->decl_with_vis
.assembler_name
;
604 /* Compute the number of bytes occupied by a tree with code CODE.
605 This function cannot be used for nodes that have variable sizes,
606 including TREE_VEC, STRING_CST, and CALL_EXPR. */
608 tree_code_size (enum tree_code code
)
610 switch (TREE_CODE_CLASS (code
))
612 case tcc_declaration
: /* A decl node */
617 return sizeof (struct tree_field_decl
);
619 return sizeof (struct tree_parm_decl
);
621 return sizeof (struct tree_var_decl
);
623 return sizeof (struct tree_label_decl
);
625 return sizeof (struct tree_result_decl
);
627 return sizeof (struct tree_const_decl
);
629 return sizeof (struct tree_type_decl
);
631 return sizeof (struct tree_function_decl
);
632 case DEBUG_EXPR_DECL
:
633 return sizeof (struct tree_decl_with_rtl
);
635 return sizeof (struct tree_decl_non_common
);
639 case tcc_type
: /* a type node */
640 return sizeof (struct tree_type_non_common
);
642 case tcc_reference
: /* a reference */
643 case tcc_expression
: /* an expression */
644 case tcc_statement
: /* an expression with side effects */
645 case tcc_comparison
: /* a comparison expression */
646 case tcc_unary
: /* a unary arithmetic expression */
647 case tcc_binary
: /* a binary arithmetic expression */
648 return (sizeof (struct tree_exp
)
649 + (TREE_CODE_LENGTH (code
) - 1) * sizeof (tree
));
651 case tcc_constant
: /* a constant */
654 case INTEGER_CST
: return sizeof (struct tree_int_cst
);
655 case REAL_CST
: return sizeof (struct tree_real_cst
);
656 case FIXED_CST
: return sizeof (struct tree_fixed_cst
);
657 case COMPLEX_CST
: return sizeof (struct tree_complex
);
658 case VECTOR_CST
: return sizeof (struct tree_vector
);
659 case STRING_CST
: gcc_unreachable ();
661 return lang_hooks
.tree_size (code
);
664 case tcc_exceptional
: /* something random, like an identifier. */
667 case IDENTIFIER_NODE
: return lang_hooks
.identifier_size
;
668 case TREE_LIST
: return sizeof (struct tree_list
);
671 case PLACEHOLDER_EXPR
: return sizeof (struct tree_common
);
674 case OMP_CLAUSE
: gcc_unreachable ();
676 case SSA_NAME
: return sizeof (struct tree_ssa_name
);
678 case STATEMENT_LIST
: return sizeof (struct tree_statement_list
);
679 case BLOCK
: return sizeof (struct tree_block
);
680 case CONSTRUCTOR
: return sizeof (struct tree_constructor
);
681 case OPTIMIZATION_NODE
: return sizeof (struct tree_optimization_option
);
682 case TARGET_OPTION_NODE
: return sizeof (struct tree_target_option
);
685 return lang_hooks
.tree_size (code
);
693 /* Compute the number of bytes occupied by NODE. This routine only
694 looks at TREE_CODE, except for those nodes that have variable sizes. */
696 tree_size (const_tree node
)
698 const enum tree_code code
= TREE_CODE (node
);
702 return (offsetof (struct tree_binfo
, base_binfos
)
704 ::embedded_size (BINFO_N_BASE_BINFOS (node
)));
707 return (sizeof (struct tree_vec
)
708 + (TREE_VEC_LENGTH (node
) - 1) * sizeof (tree
));
711 return (sizeof (struct tree_vector
)
712 + (TYPE_VECTOR_SUBPARTS (TREE_TYPE (node
)) - 1) * sizeof (tree
));
715 return TREE_STRING_LENGTH (node
) + offsetof (struct tree_string
, str
) + 1;
718 return (sizeof (struct tree_omp_clause
)
719 + (omp_clause_num_ops
[OMP_CLAUSE_CODE (node
)] - 1)
723 if (TREE_CODE_CLASS (code
) == tcc_vl_exp
)
724 return (sizeof (struct tree_exp
)
725 + (VL_EXP_OPERAND_LENGTH (node
) - 1) * sizeof (tree
));
727 return tree_code_size (code
);
731 /* Record interesting allocation statistics for a tree node with CODE
735 record_node_allocation_statistics (enum tree_code code ATTRIBUTE_UNUSED
,
736 size_t length ATTRIBUTE_UNUSED
)
738 enum tree_code_class type
= TREE_CODE_CLASS (code
);
741 if (!GATHER_STATISTICS
)
746 case tcc_declaration
: /* A decl node */
750 case tcc_type
: /* a type node */
754 case tcc_statement
: /* an expression with side effects */
758 case tcc_reference
: /* a reference */
762 case tcc_expression
: /* an expression */
763 case tcc_comparison
: /* a comparison expression */
764 case tcc_unary
: /* a unary arithmetic expression */
765 case tcc_binary
: /* a binary arithmetic expression */
769 case tcc_constant
: /* a constant */
773 case tcc_exceptional
: /* something random, like an identifier. */
776 case IDENTIFIER_NODE
:
789 kind
= ssa_name_kind
;
801 kind
= omp_clause_kind
;
818 tree_code_counts
[(int) code
]++;
819 tree_node_counts
[(int) kind
]++;
820 tree_node_sizes
[(int) kind
] += length
;
823 /* Allocate and return a new UID from the DECL_UID namespace. */
826 allocate_decl_uid (void)
828 return next_decl_uid
++;
831 /* Return a newly allocated node of code CODE. For decl and type
832 nodes, some other fields are initialized. The rest of the node is
833 initialized to zero. This function cannot be used for TREE_VEC or
834 OMP_CLAUSE nodes, which is enforced by asserts in tree_code_size.
836 Achoo! I got a code in the node. */
839 make_node_stat (enum tree_code code MEM_STAT_DECL
)
842 enum tree_code_class type
= TREE_CODE_CLASS (code
);
843 size_t length
= tree_code_size (code
);
845 record_node_allocation_statistics (code
, length
);
847 t
= ggc_alloc_cleared_tree_node_stat (length PASS_MEM_STAT
);
848 TREE_SET_CODE (t
, code
);
853 TREE_SIDE_EFFECTS (t
) = 1;
856 case tcc_declaration
:
857 if (CODE_CONTAINS_STRUCT (code
, TS_DECL_COMMON
))
859 if (code
== FUNCTION_DECL
)
861 DECL_ALIGN (t
) = FUNCTION_BOUNDARY
;
862 DECL_MODE (t
) = FUNCTION_MODE
;
867 DECL_SOURCE_LOCATION (t
) = input_location
;
868 if (TREE_CODE (t
) == DEBUG_EXPR_DECL
)
869 DECL_UID (t
) = --next_debug_decl_uid
;
872 DECL_UID (t
) = allocate_decl_uid ();
873 SET_DECL_PT_UID (t
, -1);
875 if (TREE_CODE (t
) == LABEL_DECL
)
876 LABEL_DECL_UID (t
) = -1;
881 TYPE_UID (t
) = next_type_uid
++;
882 TYPE_ALIGN (t
) = BITS_PER_UNIT
;
883 TYPE_USER_ALIGN (t
) = 0;
884 TYPE_MAIN_VARIANT (t
) = t
;
885 TYPE_CANONICAL (t
) = t
;
887 /* Default to no attributes for type, but let target change that. */
888 TYPE_ATTRIBUTES (t
) = NULL_TREE
;
889 targetm
.set_default_type_attributes (t
);
891 /* We have not yet computed the alias set for this type. */
892 TYPE_ALIAS_SET (t
) = -1;
896 TREE_CONSTANT (t
) = 1;
905 case PREDECREMENT_EXPR
:
906 case PREINCREMENT_EXPR
:
907 case POSTDECREMENT_EXPR
:
908 case POSTINCREMENT_EXPR
:
909 /* All of these have side-effects, no matter what their
911 TREE_SIDE_EFFECTS (t
) = 1;
920 /* Other classes need no special treatment. */
927 /* Return a new node with the same contents as NODE except that its
928 TREE_CHAIN, if it has one, is zero and it has a fresh uid. */
931 copy_node_stat (tree node MEM_STAT_DECL
)
934 enum tree_code code
= TREE_CODE (node
);
937 gcc_assert (code
!= STATEMENT_LIST
);
939 length
= tree_size (node
);
940 record_node_allocation_statistics (code
, length
);
941 t
= ggc_alloc_tree_node_stat (length PASS_MEM_STAT
);
942 memcpy (t
, node
, length
);
944 if (CODE_CONTAINS_STRUCT (code
, TS_COMMON
))
946 TREE_ASM_WRITTEN (t
) = 0;
947 TREE_VISITED (t
) = 0;
949 if (TREE_CODE_CLASS (code
) == tcc_declaration
)
951 if (code
== DEBUG_EXPR_DECL
)
952 DECL_UID (t
) = --next_debug_decl_uid
;
955 DECL_UID (t
) = allocate_decl_uid ();
956 if (DECL_PT_UID_SET_P (node
))
957 SET_DECL_PT_UID (t
, DECL_PT_UID (node
));
959 if ((TREE_CODE (node
) == PARM_DECL
|| TREE_CODE (node
) == VAR_DECL
)
960 && DECL_HAS_VALUE_EXPR_P (node
))
962 SET_DECL_VALUE_EXPR (t
, DECL_VALUE_EXPR (node
));
963 DECL_HAS_VALUE_EXPR_P (t
) = 1;
965 /* DECL_DEBUG_EXPR is copied explicitely by callers. */
966 if (TREE_CODE (node
) == VAR_DECL
)
967 DECL_HAS_DEBUG_EXPR_P (t
) = 0;
968 if (TREE_CODE (node
) == VAR_DECL
&& DECL_HAS_INIT_PRIORITY_P (node
))
970 SET_DECL_INIT_PRIORITY (t
, DECL_INIT_PRIORITY (node
));
971 DECL_HAS_INIT_PRIORITY_P (t
) = 1;
973 if (TREE_CODE (node
) == FUNCTION_DECL
)
974 DECL_STRUCT_FUNCTION (t
) = NULL
;
976 else if (TREE_CODE_CLASS (code
) == tcc_type
)
978 TYPE_UID (t
) = next_type_uid
++;
979 /* The following is so that the debug code for
980 the copy is different from the original type.
981 The two statements usually duplicate each other
982 (because they clear fields of the same union),
983 but the optimizer should catch that. */
984 TYPE_SYMTAB_POINTER (t
) = 0;
985 TYPE_SYMTAB_ADDRESS (t
) = 0;
987 /* Do not copy the values cache. */
988 if (TYPE_CACHED_VALUES_P (t
))
990 TYPE_CACHED_VALUES_P (t
) = 0;
991 TYPE_CACHED_VALUES (t
) = NULL_TREE
;
998 /* Return a copy of a chain of nodes, chained through the TREE_CHAIN field.
999 For example, this can copy a list made of TREE_LIST nodes. */
1002 copy_list (tree list
)
1010 head
= prev
= copy_node (list
);
1011 next
= TREE_CHAIN (list
);
1014 TREE_CHAIN (prev
) = copy_node (next
);
1015 prev
= TREE_CHAIN (prev
);
1016 next
= TREE_CHAIN (next
);
1022 /* Create an INT_CST node with a LOW value sign extended to TYPE. */
1025 build_int_cst (tree type
, HOST_WIDE_INT low
)
1027 /* Support legacy code. */
1029 type
= integer_type_node
;
1031 return double_int_to_tree (type
, double_int::from_shwi (low
));
1034 /* Create an INT_CST node with a LOW value sign extended to TYPE. */
1037 build_int_cst_type (tree type
, HOST_WIDE_INT low
)
1041 return double_int_to_tree (type
, double_int::from_shwi (low
));
1044 /* Constructs tree in type TYPE from with value given by CST. Signedness
1045 of CST is assumed to be the same as the signedness of TYPE. */
1048 double_int_to_tree (tree type
, double_int cst
)
1050 bool sign_extended_type
= !TYPE_UNSIGNED (type
);
1052 cst
= cst
.ext (TYPE_PRECISION (type
), !sign_extended_type
);
1054 return build_int_cst_wide (type
, cst
.low
, cst
.high
);
1057 /* Returns true if CST fits into range of TYPE. Signedness of CST is assumed
1058 to be the same as the signedness of TYPE. */
1061 double_int_fits_to_tree_p (const_tree type
, double_int cst
)
1063 bool sign_extended_type
= !TYPE_UNSIGNED (type
);
1066 = cst
.ext (TYPE_PRECISION (type
), !sign_extended_type
);
1071 /* We force the double_int CST to the range of the type TYPE by sign or
1072 zero extending it. OVERFLOWABLE indicates if we are interested in
1073 overflow of the value, when >0 we are only interested in signed
1074 overflow, for <0 we are interested in any overflow. OVERFLOWED
1075 indicates whether overflow has already occurred. CONST_OVERFLOWED
1076 indicates whether constant overflow has already occurred. We force
1077 T's value to be within range of T's type (by setting to 0 or 1 all
1078 the bits outside the type's range). We set TREE_OVERFLOWED if,
1079 OVERFLOWED is nonzero,
1080 or OVERFLOWABLE is >0 and signed overflow occurs
1081 or OVERFLOWABLE is <0 and any overflow occurs
1082 We return a new tree node for the extended double_int. The node
1083 is shared if no overflow flags are set. */
1087 force_fit_type_double (tree type
, double_int cst
, int overflowable
,
1090 bool sign_extended_type
= !TYPE_UNSIGNED (type
);
1092 /* If we need to set overflow flags, return a new unshared node. */
1093 if (overflowed
|| !double_int_fits_to_tree_p (type
, cst
))
1097 || (overflowable
> 0 && sign_extended_type
))
1099 tree t
= make_node (INTEGER_CST
);
1101 = cst
.ext (TYPE_PRECISION (type
), !sign_extended_type
);
1102 TREE_TYPE (t
) = type
;
1103 TREE_OVERFLOW (t
) = 1;
1108 /* Else build a shared node. */
1109 return double_int_to_tree (type
, cst
);
1112 /* These are the hash table functions for the hash table of INTEGER_CST
1113 nodes of a sizetype. */
1115 /* Return the hash code code X, an INTEGER_CST. */
1118 int_cst_hash_hash (const void *x
)
1120 const_tree
const t
= (const_tree
) x
;
1122 return (TREE_INT_CST_HIGH (t
) ^ TREE_INT_CST_LOW (t
)
1123 ^ TYPE_UID (TREE_TYPE (t
)));
1126 /* Return nonzero if the value represented by *X (an INTEGER_CST tree node)
1127 is the same as that given by *Y, which is the same. */
1130 int_cst_hash_eq (const void *x
, const void *y
)
1132 const_tree
const xt
= (const_tree
) x
;
1133 const_tree
const yt
= (const_tree
) y
;
1135 return (TREE_TYPE (xt
) == TREE_TYPE (yt
)
1136 && TREE_INT_CST_HIGH (xt
) == TREE_INT_CST_HIGH (yt
)
1137 && TREE_INT_CST_LOW (xt
) == TREE_INT_CST_LOW (yt
));
1140 /* Create an INT_CST node of TYPE and value HI:LOW.
1141 The returned node is always shared. For small integers we use a
1142 per-type vector cache, for larger ones we use a single hash table. */
1145 build_int_cst_wide (tree type
, unsigned HOST_WIDE_INT low
, HOST_WIDE_INT hi
)
1153 switch (TREE_CODE (type
))
1156 gcc_assert (hi
== 0 && low
== 0);
1160 case REFERENCE_TYPE
:
1161 /* Cache NULL pointer. */
1170 /* Cache false or true. */
1178 if (TYPE_UNSIGNED (type
))
1181 limit
= INTEGER_SHARE_LIMIT
;
1182 if (!hi
&& low
< (unsigned HOST_WIDE_INT
)INTEGER_SHARE_LIMIT
)
1188 limit
= INTEGER_SHARE_LIMIT
+ 1;
1189 if (!hi
&& low
< (unsigned HOST_WIDE_INT
)INTEGER_SHARE_LIMIT
)
1191 else if (hi
== -1 && low
== -(unsigned HOST_WIDE_INT
)1)
1205 /* Look for it in the type's vector of small shared ints. */
1206 if (!TYPE_CACHED_VALUES_P (type
))
1208 TYPE_CACHED_VALUES_P (type
) = 1;
1209 TYPE_CACHED_VALUES (type
) = make_tree_vec (limit
);
1212 t
= TREE_VEC_ELT (TYPE_CACHED_VALUES (type
), ix
);
1215 /* Make sure no one is clobbering the shared constant. */
1216 gcc_assert (TREE_TYPE (t
) == type
);
1217 gcc_assert (TREE_INT_CST_LOW (t
) == low
);
1218 gcc_assert (TREE_INT_CST_HIGH (t
) == hi
);
1222 /* Create a new shared int. */
1223 t
= make_node (INTEGER_CST
);
1225 TREE_INT_CST_LOW (t
) = low
;
1226 TREE_INT_CST_HIGH (t
) = hi
;
1227 TREE_TYPE (t
) = type
;
1229 TREE_VEC_ELT (TYPE_CACHED_VALUES (type
), ix
) = t
;
1234 /* Use the cache of larger shared ints. */
1237 TREE_INT_CST_LOW (int_cst_node
) = low
;
1238 TREE_INT_CST_HIGH (int_cst_node
) = hi
;
1239 TREE_TYPE (int_cst_node
) = type
;
1241 slot
= htab_find_slot (int_cst_hash_table
, int_cst_node
, INSERT
);
1245 /* Insert this one into the hash table. */
1248 /* Make a new node for next time round. */
1249 int_cst_node
= make_node (INTEGER_CST
);
1257 cache_integer_cst (tree t
)
1259 tree type
= TREE_TYPE (t
);
1260 HOST_WIDE_INT hi
= TREE_INT_CST_HIGH (t
);
1261 unsigned HOST_WIDE_INT low
= TREE_INT_CST_LOW (t
);
1265 gcc_assert (!TREE_OVERFLOW (t
));
1267 switch (TREE_CODE (type
))
1270 gcc_assert (hi
== 0 && low
== 0);
1274 case REFERENCE_TYPE
:
1275 /* Cache NULL pointer. */
1284 /* Cache false or true. */
1292 if (TYPE_UNSIGNED (type
))
1295 limit
= INTEGER_SHARE_LIMIT
;
1296 if (!hi
&& low
< (unsigned HOST_WIDE_INT
)INTEGER_SHARE_LIMIT
)
1302 limit
= INTEGER_SHARE_LIMIT
+ 1;
1303 if (!hi
&& low
< (unsigned HOST_WIDE_INT
)INTEGER_SHARE_LIMIT
)
1305 else if (hi
== -1 && low
== -(unsigned HOST_WIDE_INT
)1)
1319 /* Look for it in the type's vector of small shared ints. */
1320 if (!TYPE_CACHED_VALUES_P (type
))
1322 TYPE_CACHED_VALUES_P (type
) = 1;
1323 TYPE_CACHED_VALUES (type
) = make_tree_vec (limit
);
1326 gcc_assert (TREE_VEC_ELT (TYPE_CACHED_VALUES (type
), ix
) == NULL_TREE
);
1327 TREE_VEC_ELT (TYPE_CACHED_VALUES (type
), ix
) = t
;
1331 /* Use the cache of larger shared ints. */
1334 slot
= htab_find_slot (int_cst_hash_table
, t
, INSERT
);
1335 /* If there is already an entry for the number verify it's the
1339 gcc_assert (TREE_INT_CST_LOW ((tree
)*slot
) == low
1340 && TREE_INT_CST_HIGH ((tree
)*slot
) == hi
);
1343 /* Otherwise insert this one into the hash table. */
1349 /* Builds an integer constant in TYPE such that lowest BITS bits are ones
1350 and the rest are zeros. */
1353 build_low_bits_mask (tree type
, unsigned bits
)
1357 gcc_assert (bits
<= TYPE_PRECISION (type
));
1359 if (bits
== TYPE_PRECISION (type
)
1360 && !TYPE_UNSIGNED (type
))
1361 /* Sign extended all-ones mask. */
1362 mask
= double_int_minus_one
;
1364 mask
= double_int::mask (bits
);
1366 return build_int_cst_wide (type
, mask
.low
, mask
.high
);
1369 /* Checks that X is integer constant that can be expressed in (unsigned)
1370 HOST_WIDE_INT without loss of precision. */
1373 cst_and_fits_in_hwi (const_tree x
)
1375 if (TREE_CODE (x
) != INTEGER_CST
)
1378 if (TYPE_PRECISION (TREE_TYPE (x
)) > HOST_BITS_PER_WIDE_INT
)
1381 return (TREE_INT_CST_HIGH (x
) == 0
1382 || TREE_INT_CST_HIGH (x
) == -1);
1385 /* Build a newly constructed TREE_VEC node of length LEN. */
1388 make_vector_stat (unsigned len MEM_STAT_DECL
)
1391 unsigned length
= (len
- 1) * sizeof (tree
) + sizeof (struct tree_vector
);
1393 record_node_allocation_statistics (VECTOR_CST
, length
);
1395 t
= ggc_alloc_cleared_tree_node_stat (length PASS_MEM_STAT
);
1397 TREE_SET_CODE (t
, VECTOR_CST
);
1398 TREE_CONSTANT (t
) = 1;
1403 /* Return a new VECTOR_CST node whose type is TYPE and whose values
1404 are in a list pointed to by VALS. */
1407 build_vector_stat (tree type
, tree
*vals MEM_STAT_DECL
)
1411 tree v
= make_vector (TYPE_VECTOR_SUBPARTS (type
));
1412 TREE_TYPE (v
) = type
;
1414 /* Iterate through elements and check for overflow. */
1415 for (cnt
= 0; cnt
< TYPE_VECTOR_SUBPARTS (type
); ++cnt
)
1417 tree value
= vals
[cnt
];
1419 VECTOR_CST_ELT (v
, cnt
) = value
;
1421 /* Don't crash if we get an address constant. */
1422 if (!CONSTANT_CLASS_P (value
))
1425 over
|= TREE_OVERFLOW (value
);
1428 TREE_OVERFLOW (v
) = over
;
1432 /* Return a new VECTOR_CST node whose type is TYPE and whose values
1433 are extracted from V, a vector of CONSTRUCTOR_ELT. */
1436 build_vector_from_ctor (tree type
, vec
<constructor_elt
, va_gc
> *v
)
1438 tree
*vec
= XALLOCAVEC (tree
, TYPE_VECTOR_SUBPARTS (type
));
1439 unsigned HOST_WIDE_INT idx
;
1442 FOR_EACH_CONSTRUCTOR_VALUE (v
, idx
, value
)
1444 for (; idx
< TYPE_VECTOR_SUBPARTS (type
); ++idx
)
1445 vec
[idx
] = build_zero_cst (TREE_TYPE (type
));
1447 return build_vector (type
, vec
);
1450 /* Build a vector of type VECTYPE where all the elements are SCs. */
1452 build_vector_from_val (tree vectype
, tree sc
)
1454 int i
, nunits
= TYPE_VECTOR_SUBPARTS (vectype
);
1456 if (sc
== error_mark_node
)
1459 /* Verify that the vector type is suitable for SC. Note that there
1460 is some inconsistency in the type-system with respect to restrict
1461 qualifications of pointers. Vector types always have a main-variant
1462 element type and the qualification is applied to the vector-type.
1463 So TREE_TYPE (vector-type) does not return a properly qualified
1464 vector element-type. */
1465 gcc_checking_assert (types_compatible_p (TYPE_MAIN_VARIANT (TREE_TYPE (sc
)),
1466 TREE_TYPE (vectype
)));
1468 if (CONSTANT_CLASS_P (sc
))
1470 tree
*v
= XALLOCAVEC (tree
, nunits
);
1471 for (i
= 0; i
< nunits
; ++i
)
1473 return build_vector (vectype
, v
);
1477 vec
<constructor_elt
, va_gc
> *v
;
1478 vec_alloc (v
, nunits
);
1479 for (i
= 0; i
< nunits
; ++i
)
1480 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, sc
);
1481 return build_constructor (vectype
, v
);
1485 /* Return a new CONSTRUCTOR node whose type is TYPE and whose values
1486 are in the vec pointed to by VALS. */
1488 build_constructor (tree type
, vec
<constructor_elt
, va_gc
> *vals
)
1490 tree c
= make_node (CONSTRUCTOR
);
1492 constructor_elt
*elt
;
1493 bool constant_p
= true;
1494 bool side_effects_p
= false;
1496 TREE_TYPE (c
) = type
;
1497 CONSTRUCTOR_ELTS (c
) = vals
;
1499 FOR_EACH_VEC_SAFE_ELT (vals
, i
, elt
)
1501 /* Mostly ctors will have elts that don't have side-effects, so
1502 the usual case is to scan all the elements. Hence a single
1503 loop for both const and side effects, rather than one loop
1504 each (with early outs). */
1505 if (!TREE_CONSTANT (elt
->value
))
1507 if (TREE_SIDE_EFFECTS (elt
->value
))
1508 side_effects_p
= true;
1511 TREE_SIDE_EFFECTS (c
) = side_effects_p
;
1512 TREE_CONSTANT (c
) = constant_p
;
1517 /* Build a CONSTRUCTOR node made of a single initializer, with the specified
1520 build_constructor_single (tree type
, tree index
, tree value
)
1522 vec
<constructor_elt
, va_gc
> *v
;
1523 constructor_elt elt
= {index
, value
};
1526 v
->quick_push (elt
);
1528 return build_constructor (type
, v
);
1532 /* Return a new CONSTRUCTOR node whose type is TYPE and whose values
1533 are in a list pointed to by VALS. */
1535 build_constructor_from_list (tree type
, tree vals
)
1538 vec
<constructor_elt
, va_gc
> *v
= NULL
;
1542 vec_alloc (v
, list_length (vals
));
1543 for (t
= vals
; t
; t
= TREE_CHAIN (t
))
1544 CONSTRUCTOR_APPEND_ELT (v
, TREE_PURPOSE (t
), TREE_VALUE (t
));
1547 return build_constructor (type
, v
);
1550 /* Return a new CONSTRUCTOR node whose type is TYPE. NELTS is the number
1551 of elements, provided as index/value pairs. */
1554 build_constructor_va (tree type
, int nelts
, ...)
1556 vec
<constructor_elt
, va_gc
> *v
= NULL
;
1559 va_start (p
, nelts
);
1560 vec_alloc (v
, nelts
);
1563 tree index
= va_arg (p
, tree
);
1564 tree value
= va_arg (p
, tree
);
1565 CONSTRUCTOR_APPEND_ELT (v
, index
, value
);
1568 return build_constructor (type
, v
);
1571 /* Return a new FIXED_CST node whose type is TYPE and value is F. */
1574 build_fixed (tree type
, FIXED_VALUE_TYPE f
)
1577 FIXED_VALUE_TYPE
*fp
;
1579 v
= make_node (FIXED_CST
);
1580 fp
= ggc_alloc_fixed_value ();
1581 memcpy (fp
, &f
, sizeof (FIXED_VALUE_TYPE
));
1583 TREE_TYPE (v
) = type
;
1584 TREE_FIXED_CST_PTR (v
) = fp
;
1588 /* Return a new REAL_CST node whose type is TYPE and value is D. */
1591 build_real (tree type
, REAL_VALUE_TYPE d
)
1594 REAL_VALUE_TYPE
*dp
;
1597 /* ??? Used to check for overflow here via CHECK_FLOAT_TYPE.
1598 Consider doing it via real_convert now. */
1600 v
= make_node (REAL_CST
);
1601 dp
= ggc_alloc_real_value ();
1602 memcpy (dp
, &d
, sizeof (REAL_VALUE_TYPE
));
1604 TREE_TYPE (v
) = type
;
1605 TREE_REAL_CST_PTR (v
) = dp
;
1606 TREE_OVERFLOW (v
) = overflow
;
1610 /* Return a new REAL_CST node whose type is TYPE
1611 and whose value is the integer value of the INTEGER_CST node I. */
1614 real_value_from_int_cst (const_tree type
, const_tree i
)
1618 /* Clear all bits of the real value type so that we can later do
1619 bitwise comparisons to see if two values are the same. */
1620 memset (&d
, 0, sizeof d
);
1622 real_from_integer (&d
, type
? TYPE_MODE (type
) : VOIDmode
,
1623 TREE_INT_CST_LOW (i
), TREE_INT_CST_HIGH (i
),
1624 TYPE_UNSIGNED (TREE_TYPE (i
)));
1628 /* Given a tree representing an integer constant I, return a tree
1629 representing the same value as a floating-point constant of type TYPE. */
1632 build_real_from_int_cst (tree type
, const_tree i
)
1635 int overflow
= TREE_OVERFLOW (i
);
1637 v
= build_real (type
, real_value_from_int_cst (type
, i
));
1639 TREE_OVERFLOW (v
) |= overflow
;
1643 /* Return a newly constructed STRING_CST node whose value is
1644 the LEN characters at STR.
1645 Note that for a C string literal, LEN should include the trailing NUL.
1646 The TREE_TYPE is not initialized. */
1649 build_string (int len
, const char *str
)
1654 /* Do not waste bytes provided by padding of struct tree_string. */
1655 length
= len
+ offsetof (struct tree_string
, str
) + 1;
1657 record_node_allocation_statistics (STRING_CST
, length
);
1659 s
= ggc_alloc_tree_node (length
);
1661 memset (s
, 0, sizeof (struct tree_typed
));
1662 TREE_SET_CODE (s
, STRING_CST
);
1663 TREE_CONSTANT (s
) = 1;
1664 TREE_STRING_LENGTH (s
) = len
;
1665 memcpy (s
->string
.str
, str
, len
);
1666 s
->string
.str
[len
] = '\0';
1671 /* Return a newly constructed COMPLEX_CST node whose value is
1672 specified by the real and imaginary parts REAL and IMAG.
1673 Both REAL and IMAG should be constant nodes. TYPE, if specified,
1674 will be the type of the COMPLEX_CST; otherwise a new type will be made. */
1677 build_complex (tree type
, tree real
, tree imag
)
1679 tree t
= make_node (COMPLEX_CST
);
1681 TREE_REALPART (t
) = real
;
1682 TREE_IMAGPART (t
) = imag
;
1683 TREE_TYPE (t
) = type
? type
: build_complex_type (TREE_TYPE (real
));
1684 TREE_OVERFLOW (t
) = TREE_OVERFLOW (real
) | TREE_OVERFLOW (imag
);
1688 /* Return a constant of arithmetic type TYPE which is the
1689 multiplicative identity of the set TYPE. */
1692 build_one_cst (tree type
)
1694 switch (TREE_CODE (type
))
1696 case INTEGER_TYPE
: case ENUMERAL_TYPE
: case BOOLEAN_TYPE
:
1697 case POINTER_TYPE
: case REFERENCE_TYPE
:
1699 return build_int_cst (type
, 1);
1702 return build_real (type
, dconst1
);
1704 case FIXED_POINT_TYPE
:
1705 /* We can only generate 1 for accum types. */
1706 gcc_assert (ALL_SCALAR_ACCUM_MODE_P (TYPE_MODE (type
)));
1707 return build_fixed (type
, FCONST1 (TYPE_MODE (type
)));
1711 tree scalar
= build_one_cst (TREE_TYPE (type
));
1713 return build_vector_from_val (type
, scalar
);
1717 return build_complex (type
,
1718 build_one_cst (TREE_TYPE (type
)),
1719 build_zero_cst (TREE_TYPE (type
)));
1726 /* Return an integer of type TYPE containing all 1's in as much precision as
1727 it contains, or a complex or vector whose subparts are such integers. */
1730 build_all_ones_cst (tree type
)
1732 if (TREE_CODE (type
) == COMPLEX_TYPE
)
1734 tree scalar
= build_all_ones_cst (TREE_TYPE (type
));
1735 return build_complex (type
, scalar
, scalar
);
1738 return build_minus_one_cst (type
);
1741 /* Return a constant of arithmetic type TYPE which is the
1742 opposite of the multiplicative identity of the set TYPE. */
1745 build_minus_one_cst (tree type
)
1747 switch (TREE_CODE (type
))
1749 case INTEGER_TYPE
: case ENUMERAL_TYPE
: case BOOLEAN_TYPE
:
1750 case POINTER_TYPE
: case REFERENCE_TYPE
:
1752 return build_int_cst (type
, -1);
1755 return build_real (type
, dconstm1
);
1757 case FIXED_POINT_TYPE
:
1758 /* We can only generate 1 for accum types. */
1759 gcc_assert (ALL_SCALAR_ACCUM_MODE_P (TYPE_MODE (type
)));
1760 return build_fixed (type
, fixed_from_double_int (double_int_minus_one
,
1765 tree scalar
= build_minus_one_cst (TREE_TYPE (type
));
1767 return build_vector_from_val (type
, scalar
);
1771 return build_complex (type
,
1772 build_minus_one_cst (TREE_TYPE (type
)),
1773 build_zero_cst (TREE_TYPE (type
)));
1780 /* Build 0 constant of type TYPE. This is used by constructor folding
1781 and thus the constant should be represented in memory by
1785 build_zero_cst (tree type
)
1787 switch (TREE_CODE (type
))
1789 case INTEGER_TYPE
: case ENUMERAL_TYPE
: case BOOLEAN_TYPE
:
1790 case POINTER_TYPE
: case REFERENCE_TYPE
:
1791 case OFFSET_TYPE
: case NULLPTR_TYPE
:
1792 return build_int_cst (type
, 0);
1795 return build_real (type
, dconst0
);
1797 case FIXED_POINT_TYPE
:
1798 return build_fixed (type
, FCONST0 (TYPE_MODE (type
)));
1802 tree scalar
= build_zero_cst (TREE_TYPE (type
));
1804 return build_vector_from_val (type
, scalar
);
1809 tree zero
= build_zero_cst (TREE_TYPE (type
));
1811 return build_complex (type
, zero
, zero
);
1815 if (!AGGREGATE_TYPE_P (type
))
1816 return fold_convert (type
, integer_zero_node
);
1817 return build_constructor (type
, NULL
);
1822 /* Build a BINFO with LEN language slots. */
1825 make_tree_binfo_stat (unsigned base_binfos MEM_STAT_DECL
)
1828 size_t length
= (offsetof (struct tree_binfo
, base_binfos
)
1829 + vec
<tree
, va_gc
>::embedded_size (base_binfos
));
1831 record_node_allocation_statistics (TREE_BINFO
, length
);
1833 t
= ggc_alloc_tree_node_stat (length PASS_MEM_STAT
);
1835 memset (t
, 0, offsetof (struct tree_binfo
, base_binfos
));
1837 TREE_SET_CODE (t
, TREE_BINFO
);
1839 BINFO_BASE_BINFOS (t
)->embedded_init (base_binfos
);
1844 /* Create a CASE_LABEL_EXPR tree node and return it. */
1847 build_case_label (tree low_value
, tree high_value
, tree label_decl
)
1849 tree t
= make_node (CASE_LABEL_EXPR
);
1851 TREE_TYPE (t
) = void_type_node
;
1852 SET_EXPR_LOCATION (t
, DECL_SOURCE_LOCATION (label_decl
));
1854 CASE_LOW (t
) = low_value
;
1855 CASE_HIGH (t
) = high_value
;
1856 CASE_LABEL (t
) = label_decl
;
1857 CASE_CHAIN (t
) = NULL_TREE
;
1862 /* Build a newly constructed TREE_VEC node of length LEN. */
1865 make_tree_vec_stat (int len MEM_STAT_DECL
)
1868 int length
= (len
- 1) * sizeof (tree
) + sizeof (struct tree_vec
);
1870 record_node_allocation_statistics (TREE_VEC
, length
);
1872 t
= ggc_alloc_cleared_tree_node_stat (length PASS_MEM_STAT
);
1874 TREE_SET_CODE (t
, TREE_VEC
);
1875 TREE_VEC_LENGTH (t
) = len
;
1880 /* Grow a TREE_VEC node to new length LEN. */
1883 grow_tree_vec_stat (tree v
, int len MEM_STAT_DECL
)
1885 gcc_assert (TREE_CODE (v
) == TREE_VEC
);
1887 int oldlen
= TREE_VEC_LENGTH (v
);
1888 gcc_assert (len
> oldlen
);
1890 int oldlength
= (oldlen
- 1) * sizeof (tree
) + sizeof (struct tree_vec
);
1891 int length
= (len
- 1) * sizeof (tree
) + sizeof (struct tree_vec
);
1893 record_node_allocation_statistics (TREE_VEC
, length
- oldlength
);
1895 v
= (tree
) ggc_realloc_stat (v
, length PASS_MEM_STAT
);
1897 TREE_VEC_LENGTH (v
) = len
;
1902 /* Return 1 if EXPR is the integer constant zero or a complex constant
1906 integer_zerop (const_tree expr
)
1910 switch (TREE_CODE (expr
))
1913 return (TREE_INT_CST_LOW (expr
) == 0
1914 && TREE_INT_CST_HIGH (expr
) == 0);
1916 return (integer_zerop (TREE_REALPART (expr
))
1917 && integer_zerop (TREE_IMAGPART (expr
)));
1921 for (i
= 0; i
< VECTOR_CST_NELTS (expr
); ++i
)
1922 if (!integer_zerop (VECTOR_CST_ELT (expr
, i
)))
1931 /* Return 1 if EXPR is the integer constant one or the corresponding
1932 complex constant. */
1935 integer_onep (const_tree expr
)
1939 switch (TREE_CODE (expr
))
1942 return (TREE_INT_CST_LOW (expr
) == 1
1943 && TREE_INT_CST_HIGH (expr
) == 0);
1945 return (integer_onep (TREE_REALPART (expr
))
1946 && integer_zerop (TREE_IMAGPART (expr
)));
1950 for (i
= 0; i
< VECTOR_CST_NELTS (expr
); ++i
)
1951 if (!integer_onep (VECTOR_CST_ELT (expr
, i
)))
1960 /* Return 1 if EXPR is an integer containing all 1's in as much precision as
1961 it contains, or a complex or vector whose subparts are such integers. */
1964 integer_all_onesp (const_tree expr
)
1971 if (TREE_CODE (expr
) == COMPLEX_CST
1972 && integer_all_onesp (TREE_REALPART (expr
))
1973 && integer_all_onesp (TREE_IMAGPART (expr
)))
1976 else if (TREE_CODE (expr
) == VECTOR_CST
)
1979 for (i
= 0; i
< VECTOR_CST_NELTS (expr
); ++i
)
1980 if (!integer_all_onesp (VECTOR_CST_ELT (expr
, i
)))
1985 else if (TREE_CODE (expr
) != INTEGER_CST
)
1988 uns
= TYPE_UNSIGNED (TREE_TYPE (expr
));
1989 if (TREE_INT_CST_LOW (expr
) == ~(unsigned HOST_WIDE_INT
) 0
1990 && TREE_INT_CST_HIGH (expr
) == -1)
1995 prec
= TYPE_PRECISION (TREE_TYPE (expr
));
1996 if (prec
>= HOST_BITS_PER_WIDE_INT
)
1998 HOST_WIDE_INT high_value
;
2001 shift_amount
= prec
- HOST_BITS_PER_WIDE_INT
;
2003 /* Can not handle precisions greater than twice the host int size. */
2004 gcc_assert (shift_amount
<= HOST_BITS_PER_WIDE_INT
);
2005 if (shift_amount
== HOST_BITS_PER_WIDE_INT
)
2006 /* Shifting by the host word size is undefined according to the ANSI
2007 standard, so we must handle this as a special case. */
2010 high_value
= ((HOST_WIDE_INT
) 1 << shift_amount
) - 1;
2012 return (TREE_INT_CST_LOW (expr
) == ~(unsigned HOST_WIDE_INT
) 0
2013 && TREE_INT_CST_HIGH (expr
) == high_value
);
2016 return TREE_INT_CST_LOW (expr
) == ((unsigned HOST_WIDE_INT
) 1 << prec
) - 1;
2019 /* Return 1 if EXPR is the integer constant minus one. */
2022 integer_minus_onep (const_tree expr
)
2026 if (TREE_CODE (expr
) == COMPLEX_CST
)
2027 return (integer_all_onesp (TREE_REALPART (expr
))
2028 && integer_zerop (TREE_IMAGPART (expr
)));
2030 return integer_all_onesp (expr
);
2033 /* Return 1 if EXPR is an integer constant that is a power of 2 (i.e., has only
2037 integer_pow2p (const_tree expr
)
2040 unsigned HOST_WIDE_INT high
, low
;
2044 if (TREE_CODE (expr
) == COMPLEX_CST
2045 && integer_pow2p (TREE_REALPART (expr
))
2046 && integer_zerop (TREE_IMAGPART (expr
)))
2049 if (TREE_CODE (expr
) != INTEGER_CST
)
2052 prec
= TYPE_PRECISION (TREE_TYPE (expr
));
2053 high
= TREE_INT_CST_HIGH (expr
);
2054 low
= TREE_INT_CST_LOW (expr
);
2056 /* First clear all bits that are beyond the type's precision in case
2057 we've been sign extended. */
2059 if (prec
== HOST_BITS_PER_DOUBLE_INT
)
2061 else if (prec
> HOST_BITS_PER_WIDE_INT
)
2062 high
&= ~(HOST_WIDE_INT_M1U
<< (prec
- HOST_BITS_PER_WIDE_INT
));
2066 if (prec
< HOST_BITS_PER_WIDE_INT
)
2067 low
&= ~(HOST_WIDE_INT_M1U
<< prec
);
2070 if (high
== 0 && low
== 0)
2073 return ((high
== 0 && (low
& (low
- 1)) == 0)
2074 || (low
== 0 && (high
& (high
- 1)) == 0));
2077 /* Return 1 if EXPR is an integer constant other than zero or a
2078 complex constant other than zero. */
2081 integer_nonzerop (const_tree expr
)
2085 return ((TREE_CODE (expr
) == INTEGER_CST
2086 && (TREE_INT_CST_LOW (expr
) != 0
2087 || TREE_INT_CST_HIGH (expr
) != 0))
2088 || (TREE_CODE (expr
) == COMPLEX_CST
2089 && (integer_nonzerop (TREE_REALPART (expr
))
2090 || integer_nonzerop (TREE_IMAGPART (expr
)))));
2093 /* Return 1 if EXPR is the fixed-point constant zero. */
2096 fixed_zerop (const_tree expr
)
2098 return (TREE_CODE (expr
) == FIXED_CST
2099 && TREE_FIXED_CST (expr
).data
.is_zero ());
2102 /* Return the power of two represented by a tree node known to be a
2106 tree_log2 (const_tree expr
)
2109 HOST_WIDE_INT high
, low
;
2113 if (TREE_CODE (expr
) == COMPLEX_CST
)
2114 return tree_log2 (TREE_REALPART (expr
));
2116 prec
= TYPE_PRECISION (TREE_TYPE (expr
));
2117 high
= TREE_INT_CST_HIGH (expr
);
2118 low
= TREE_INT_CST_LOW (expr
);
2120 /* First clear all bits that are beyond the type's precision in case
2121 we've been sign extended. */
2123 if (prec
== HOST_BITS_PER_DOUBLE_INT
)
2125 else if (prec
> HOST_BITS_PER_WIDE_INT
)
2126 high
&= ~(HOST_WIDE_INT_M1U
<< (prec
- HOST_BITS_PER_WIDE_INT
));
2130 if (prec
< HOST_BITS_PER_WIDE_INT
)
2131 low
&= ~(HOST_WIDE_INT_M1U
<< prec
);
2134 return (high
!= 0 ? HOST_BITS_PER_WIDE_INT
+ exact_log2 (high
)
2135 : exact_log2 (low
));
2138 /* Similar, but return the largest integer Y such that 2 ** Y is less
2139 than or equal to EXPR. */
2142 tree_floor_log2 (const_tree expr
)
2145 HOST_WIDE_INT high
, low
;
2149 if (TREE_CODE (expr
) == COMPLEX_CST
)
2150 return tree_log2 (TREE_REALPART (expr
));
2152 prec
= TYPE_PRECISION (TREE_TYPE (expr
));
2153 high
= TREE_INT_CST_HIGH (expr
);
2154 low
= TREE_INT_CST_LOW (expr
);
2156 /* First clear all bits that are beyond the type's precision in case
2157 we've been sign extended. Ignore if type's precision hasn't been set
2158 since what we are doing is setting it. */
2160 if (prec
== HOST_BITS_PER_DOUBLE_INT
|| prec
== 0)
2162 else if (prec
> HOST_BITS_PER_WIDE_INT
)
2163 high
&= ~(HOST_WIDE_INT_M1U
<< (prec
- HOST_BITS_PER_WIDE_INT
));
2167 if (prec
< HOST_BITS_PER_WIDE_INT
)
2168 low
&= ~(HOST_WIDE_INT_M1U
<< prec
);
2171 return (high
!= 0 ? HOST_BITS_PER_WIDE_INT
+ floor_log2 (high
)
2172 : floor_log2 (low
));
2175 /* Return number of known trailing zero bits in EXPR, or, if the value of
2176 EXPR is known to be zero, the precision of it's type. */
2179 tree_ctz (const_tree expr
)
2181 if (!INTEGRAL_TYPE_P (TREE_TYPE (expr
))
2182 && !POINTER_TYPE_P (TREE_TYPE (expr
)))
2185 unsigned int ret1
, ret2
, prec
= TYPE_PRECISION (TREE_TYPE (expr
));
2186 switch (TREE_CODE (expr
))
2189 ret1
= tree_to_double_int (expr
).trailing_zeros ();
2190 return MIN (ret1
, prec
);
2192 ret1
= get_nonzero_bits (expr
).trailing_zeros ();
2193 return MIN (ret1
, prec
);
2200 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2203 ret2
= tree_ctz (TREE_OPERAND (expr
, 1));
2204 return MIN (ret1
, ret2
);
2205 case POINTER_PLUS_EXPR
:
2206 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2207 ret2
= tree_ctz (TREE_OPERAND (expr
, 1));
2208 /* Second operand is sizetype, which could be in theory
2209 wider than pointer's precision. Make sure we never
2210 return more than prec. */
2211 ret2
= MIN (ret2
, prec
);
2212 return MIN (ret1
, ret2
);
2214 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2215 ret2
= tree_ctz (TREE_OPERAND (expr
, 1));
2216 return MAX (ret1
, ret2
);
2218 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2219 ret2
= tree_ctz (TREE_OPERAND (expr
, 1));
2220 return MIN (ret1
+ ret2
, prec
);
2222 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2223 if (tree_fits_uhwi_p (TREE_OPERAND (expr
, 1))
2224 && (tree_to_uhwi (TREE_OPERAND (expr
, 1)) < prec
))
2226 ret2
= tree_to_uhwi (TREE_OPERAND (expr
, 1));
2227 return MIN (ret1
+ ret2
, prec
);
2231 if (tree_fits_uhwi_p (TREE_OPERAND (expr
, 1))
2232 && (tree_to_uhwi (TREE_OPERAND (expr
, 1)) < prec
))
2234 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2235 ret2
= tree_to_uhwi (TREE_OPERAND (expr
, 1));
2240 case TRUNC_DIV_EXPR
:
2242 case FLOOR_DIV_EXPR
:
2243 case ROUND_DIV_EXPR
:
2244 case EXACT_DIV_EXPR
:
2245 if (TREE_CODE (TREE_OPERAND (expr
, 1)) == INTEGER_CST
2246 && tree_int_cst_sgn (TREE_OPERAND (expr
, 1)) == 1)
2248 int l
= tree_log2 (TREE_OPERAND (expr
, 1));
2251 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2259 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2260 if (ret1
&& ret1
== TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (expr
, 0))))
2262 return MIN (ret1
, prec
);
2264 return tree_ctz (TREE_OPERAND (expr
, 0));
2266 ret1
= tree_ctz (TREE_OPERAND (expr
, 1));
2269 ret2
= tree_ctz (TREE_OPERAND (expr
, 2));
2270 return MIN (ret1
, ret2
);
2272 return tree_ctz (TREE_OPERAND (expr
, 1));
2274 ret1
= get_pointer_alignment (CONST_CAST_TREE (expr
));
2275 if (ret1
> BITS_PER_UNIT
)
2277 ret1
= ctz_hwi (ret1
/ BITS_PER_UNIT
);
2278 return MIN (ret1
, prec
);
2286 /* Return 1 if EXPR is the real constant zero. Trailing zeroes matter for
2287 decimal float constants, so don't return 1 for them. */
2290 real_zerop (const_tree expr
)
2294 switch (TREE_CODE (expr
))
2297 return REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconst0
)
2298 && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr
))));
2300 return real_zerop (TREE_REALPART (expr
))
2301 && real_zerop (TREE_IMAGPART (expr
));
2305 for (i
= 0; i
< VECTOR_CST_NELTS (expr
); ++i
)
2306 if (!real_zerop (VECTOR_CST_ELT (expr
, i
)))
2315 /* Return 1 if EXPR is the real constant one in real or complex form.
2316 Trailing zeroes matter for decimal float constants, so don't return
2320 real_onep (const_tree expr
)
2324 switch (TREE_CODE (expr
))
2327 return REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconst1
)
2328 && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr
))));
2330 return real_onep (TREE_REALPART (expr
))
2331 && real_zerop (TREE_IMAGPART (expr
));
2335 for (i
= 0; i
< VECTOR_CST_NELTS (expr
); ++i
)
2336 if (!real_onep (VECTOR_CST_ELT (expr
, i
)))
2345 /* Return 1 if EXPR is the real constant minus one. Trailing zeroes
2346 matter for decimal float constants, so don't return 1 for them. */
2349 real_minus_onep (const_tree expr
)
2353 switch (TREE_CODE (expr
))
2356 return REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconstm1
)
2357 && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr
))));
2359 return real_minus_onep (TREE_REALPART (expr
))
2360 && real_zerop (TREE_IMAGPART (expr
));
2364 for (i
= 0; i
< VECTOR_CST_NELTS (expr
); ++i
)
2365 if (!real_minus_onep (VECTOR_CST_ELT (expr
, i
)))
2374 /* Nonzero if EXP is a constant or a cast of a constant. */
2377 really_constant_p (const_tree exp
)
2379 /* This is not quite the same as STRIP_NOPS. It does more. */
2380 while (CONVERT_EXPR_P (exp
)
2381 || TREE_CODE (exp
) == NON_LVALUE_EXPR
)
2382 exp
= TREE_OPERAND (exp
, 0);
2383 return TREE_CONSTANT (exp
);
2386 /* Return first list element whose TREE_VALUE is ELEM.
2387 Return 0 if ELEM is not in LIST. */
2390 value_member (tree elem
, tree list
)
2394 if (elem
== TREE_VALUE (list
))
2396 list
= TREE_CHAIN (list
);
2401 /* Return first list element whose TREE_PURPOSE is ELEM.
2402 Return 0 if ELEM is not in LIST. */
2405 purpose_member (const_tree elem
, tree list
)
2409 if (elem
== TREE_PURPOSE (list
))
2411 list
= TREE_CHAIN (list
);
2416 /* Return true if ELEM is in V. */
2419 vec_member (const_tree elem
, vec
<tree
, va_gc
> *v
)
2423 FOR_EACH_VEC_SAFE_ELT (v
, ix
, t
)
2429 /* Returns element number IDX (zero-origin) of chain CHAIN, or
2433 chain_index (int idx
, tree chain
)
2435 for (; chain
&& idx
> 0; --idx
)
2436 chain
= TREE_CHAIN (chain
);
2440 /* Return nonzero if ELEM is part of the chain CHAIN. */
2443 chain_member (const_tree elem
, const_tree chain
)
2449 chain
= DECL_CHAIN (chain
);
2455 /* Return the length of a chain of nodes chained through TREE_CHAIN.
2456 We expect a null pointer to mark the end of the chain.
2457 This is the Lisp primitive `length'. */
2460 list_length (const_tree t
)
2463 #ifdef ENABLE_TREE_CHECKING
2471 #ifdef ENABLE_TREE_CHECKING
2474 gcc_assert (p
!= q
);
2482 /* Returns the first FIELD_DECL in the TYPE_FIELDS of the RECORD_TYPE or
2483 UNION_TYPE TYPE, or NULL_TREE if none. */
2486 first_field (const_tree type
)
2488 tree t
= TYPE_FIELDS (type
);
2489 while (t
&& TREE_CODE (t
) != FIELD_DECL
)
2494 /* Concatenate two chains of nodes (chained through TREE_CHAIN)
2495 by modifying the last node in chain 1 to point to chain 2.
2496 This is the Lisp primitive `nconc'. */
2499 chainon (tree op1
, tree op2
)
2508 for (t1
= op1
; TREE_CHAIN (t1
); t1
= TREE_CHAIN (t1
))
2510 TREE_CHAIN (t1
) = op2
;
2512 #ifdef ENABLE_TREE_CHECKING
2515 for (t2
= op2
; t2
; t2
= TREE_CHAIN (t2
))
2516 gcc_assert (t2
!= t1
);
2523 /* Return the last node in a chain of nodes (chained through TREE_CHAIN). */
2526 tree_last (tree chain
)
2530 while ((next
= TREE_CHAIN (chain
)))
2535 /* Reverse the order of elements in the chain T,
2536 and return the new head of the chain (old last element). */
2541 tree prev
= 0, decl
, next
;
2542 for (decl
= t
; decl
; decl
= next
)
2544 /* We shouldn't be using this function to reverse BLOCK chains; we
2545 have blocks_nreverse for that. */
2546 gcc_checking_assert (TREE_CODE (decl
) != BLOCK
);
2547 next
= TREE_CHAIN (decl
);
2548 TREE_CHAIN (decl
) = prev
;
2554 /* Return a newly created TREE_LIST node whose
2555 purpose and value fields are PARM and VALUE. */
2558 build_tree_list_stat (tree parm
, tree value MEM_STAT_DECL
)
2560 tree t
= make_node_stat (TREE_LIST PASS_MEM_STAT
);
2561 TREE_PURPOSE (t
) = parm
;
2562 TREE_VALUE (t
) = value
;
2566 /* Build a chain of TREE_LIST nodes from a vector. */
2569 build_tree_list_vec_stat (const vec
<tree
, va_gc
> *vec MEM_STAT_DECL
)
2571 tree ret
= NULL_TREE
;
2575 FOR_EACH_VEC_SAFE_ELT (vec
, i
, t
)
2577 *pp
= build_tree_list_stat (NULL
, t PASS_MEM_STAT
);
2578 pp
= &TREE_CHAIN (*pp
);
2583 /* Return a newly created TREE_LIST node whose
2584 purpose and value fields are PURPOSE and VALUE
2585 and whose TREE_CHAIN is CHAIN. */
2588 tree_cons_stat (tree purpose
, tree value
, tree chain MEM_STAT_DECL
)
2592 node
= ggc_alloc_tree_node_stat (sizeof (struct tree_list
) PASS_MEM_STAT
);
2593 memset (node
, 0, sizeof (struct tree_common
));
2595 record_node_allocation_statistics (TREE_LIST
, sizeof (struct tree_list
));
2597 TREE_SET_CODE (node
, TREE_LIST
);
2598 TREE_CHAIN (node
) = chain
;
2599 TREE_PURPOSE (node
) = purpose
;
2600 TREE_VALUE (node
) = value
;
2604 /* Return the values of the elements of a CONSTRUCTOR as a vector of
2608 ctor_to_vec (tree ctor
)
2610 vec
<tree
, va_gc
> *vec
;
2611 vec_alloc (vec
, CONSTRUCTOR_NELTS (ctor
));
2615 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (ctor
), ix
, val
)
2616 vec
->quick_push (val
);
2621 /* Return the size nominally occupied by an object of type TYPE
2622 when it resides in memory. The value is measured in units of bytes,
2623 and its data type is that normally used for type sizes
2624 (which is the first type created by make_signed_type or
2625 make_unsigned_type). */
2628 size_in_bytes (const_tree type
)
2632 if (type
== error_mark_node
)
2633 return integer_zero_node
;
2635 type
= TYPE_MAIN_VARIANT (type
);
2636 t
= TYPE_SIZE_UNIT (type
);
2640 lang_hooks
.types
.incomplete_type_error (NULL_TREE
, type
);
2641 return size_zero_node
;
2647 /* Return the size of TYPE (in bytes) as a wide integer
2648 or return -1 if the size can vary or is larger than an integer. */
2651 int_size_in_bytes (const_tree type
)
2655 if (type
== error_mark_node
)
2658 type
= TYPE_MAIN_VARIANT (type
);
2659 t
= TYPE_SIZE_UNIT (type
);
2661 || TREE_CODE (t
) != INTEGER_CST
2662 || TREE_INT_CST_HIGH (t
) != 0
2663 /* If the result would appear negative, it's too big to represent. */
2664 || (HOST_WIDE_INT
) TREE_INT_CST_LOW (t
) < 0)
2667 return TREE_INT_CST_LOW (t
);
2670 /* Return the maximum size of TYPE (in bytes) as a wide integer
2671 or return -1 if the size can vary or is larger than an integer. */
2674 max_int_size_in_bytes (const_tree type
)
2676 HOST_WIDE_INT size
= -1;
2679 /* If this is an array type, check for a possible MAX_SIZE attached. */
2681 if (TREE_CODE (type
) == ARRAY_TYPE
)
2683 size_tree
= TYPE_ARRAY_MAX_SIZE (type
);
2685 if (size_tree
&& tree_fits_uhwi_p (size_tree
))
2686 size
= tree_to_uhwi (size_tree
);
2689 /* If we still haven't been able to get a size, see if the language
2690 can compute a maximum size. */
2694 size_tree
= lang_hooks
.types
.max_size (type
);
2696 if (size_tree
&& tree_fits_uhwi_p (size_tree
))
2697 size
= tree_to_uhwi (size_tree
);
2703 /* Return the bit position of FIELD, in bits from the start of the record.
2704 This is a tree of type bitsizetype. */
2707 bit_position (const_tree field
)
2709 return bit_from_pos (DECL_FIELD_OFFSET (field
),
2710 DECL_FIELD_BIT_OFFSET (field
));
2713 /* Likewise, but return as an integer. It must be representable in
2714 that way (since it could be a signed value, we don't have the
2715 option of returning -1 like int_size_in_byte can. */
2718 int_bit_position (const_tree field
)
2720 return tree_to_shwi (bit_position (field
));
2723 /* Return the byte position of FIELD, in bytes from the start of the record.
2724 This is a tree of type sizetype. */
2727 byte_position (const_tree field
)
2729 return byte_from_pos (DECL_FIELD_OFFSET (field
),
2730 DECL_FIELD_BIT_OFFSET (field
));
2733 /* Likewise, but return as an integer. It must be representable in
2734 that way (since it could be a signed value, we don't have the
2735 option of returning -1 like int_size_in_byte can. */
2738 int_byte_position (const_tree field
)
2740 return tree_to_shwi (byte_position (field
));
2743 /* Return the strictest alignment, in bits, that T is known to have. */
2746 expr_align (const_tree t
)
2748 unsigned int align0
, align1
;
2750 switch (TREE_CODE (t
))
2752 CASE_CONVERT
: case NON_LVALUE_EXPR
:
2753 /* If we have conversions, we know that the alignment of the
2754 object must meet each of the alignments of the types. */
2755 align0
= expr_align (TREE_OPERAND (t
, 0));
2756 align1
= TYPE_ALIGN (TREE_TYPE (t
));
2757 return MAX (align0
, align1
);
2759 case SAVE_EXPR
: case COMPOUND_EXPR
: case MODIFY_EXPR
:
2760 case INIT_EXPR
: case TARGET_EXPR
: case WITH_CLEANUP_EXPR
:
2761 case CLEANUP_POINT_EXPR
:
2762 /* These don't change the alignment of an object. */
2763 return expr_align (TREE_OPERAND (t
, 0));
2766 /* The best we can do is say that the alignment is the least aligned
2768 align0
= expr_align (TREE_OPERAND (t
, 1));
2769 align1
= expr_align (TREE_OPERAND (t
, 2));
2770 return MIN (align0
, align1
);
2772 /* FIXME: LABEL_DECL and CONST_DECL never have DECL_ALIGN set
2773 meaningfully, it's always 1. */
2774 case LABEL_DECL
: case CONST_DECL
:
2775 case VAR_DECL
: case PARM_DECL
: case RESULT_DECL
:
2777 gcc_assert (DECL_ALIGN (t
) != 0);
2778 return DECL_ALIGN (t
);
2784 /* Otherwise take the alignment from that of the type. */
2785 return TYPE_ALIGN (TREE_TYPE (t
));
2788 /* Return, as a tree node, the number of elements for TYPE (which is an
2789 ARRAY_TYPE) minus one. This counts only elements of the top array. */
2792 array_type_nelts (const_tree type
)
2794 tree index_type
, min
, max
;
2796 /* If they did it with unspecified bounds, then we should have already
2797 given an error about it before we got here. */
2798 if (! TYPE_DOMAIN (type
))
2799 return error_mark_node
;
2801 index_type
= TYPE_DOMAIN (type
);
2802 min
= TYPE_MIN_VALUE (index_type
);
2803 max
= TYPE_MAX_VALUE (index_type
);
2805 /* TYPE_MAX_VALUE may not be set if the array has unknown length. */
2807 return error_mark_node
;
2809 return (integer_zerop (min
)
2811 : fold_build2 (MINUS_EXPR
, TREE_TYPE (max
), max
, min
));
2814 /* If arg is static -- a reference to an object in static storage -- then
2815 return the object. This is not the same as the C meaning of `static'.
2816 If arg isn't static, return NULL. */
2821 switch (TREE_CODE (arg
))
2824 /* Nested functions are static, even though taking their address will
2825 involve a trampoline as we unnest the nested function and create
2826 the trampoline on the tree level. */
2830 return ((TREE_STATIC (arg
) || DECL_EXTERNAL (arg
))
2831 && ! DECL_THREAD_LOCAL_P (arg
)
2832 && ! DECL_DLLIMPORT_P (arg
)
2836 return ((TREE_STATIC (arg
) || DECL_EXTERNAL (arg
))
2840 return TREE_STATIC (arg
) ? arg
: NULL
;
2847 /* If the thing being referenced is not a field, then it is
2848 something language specific. */
2849 gcc_assert (TREE_CODE (TREE_OPERAND (arg
, 1)) == FIELD_DECL
);
2851 /* If we are referencing a bitfield, we can't evaluate an
2852 ADDR_EXPR at compile time and so it isn't a constant. */
2853 if (DECL_BIT_FIELD (TREE_OPERAND (arg
, 1)))
2856 return staticp (TREE_OPERAND (arg
, 0));
2862 return TREE_CONSTANT (TREE_OPERAND (arg
, 0)) ? arg
: NULL
;
2865 case ARRAY_RANGE_REF
:
2866 if (TREE_CODE (TYPE_SIZE (TREE_TYPE (arg
))) == INTEGER_CST
2867 && TREE_CODE (TREE_OPERAND (arg
, 1)) == INTEGER_CST
)
2868 return staticp (TREE_OPERAND (arg
, 0));
2872 case COMPOUND_LITERAL_EXPR
:
2873 return TREE_STATIC (COMPOUND_LITERAL_EXPR_DECL (arg
)) ? arg
: NULL
;
2883 /* Return whether OP is a DECL whose address is function-invariant. */
2886 decl_address_invariant_p (const_tree op
)
2888 /* The conditions below are slightly less strict than the one in
2891 switch (TREE_CODE (op
))
2900 if ((TREE_STATIC (op
) || DECL_EXTERNAL (op
))
2901 || DECL_THREAD_LOCAL_P (op
)
2902 || DECL_CONTEXT (op
) == current_function_decl
2903 || decl_function_context (op
) == current_function_decl
)
2908 if ((TREE_STATIC (op
) || DECL_EXTERNAL (op
))
2909 || decl_function_context (op
) == current_function_decl
)
2920 /* Return whether OP is a DECL whose address is interprocedural-invariant. */
2923 decl_address_ip_invariant_p (const_tree op
)
2925 /* The conditions below are slightly less strict than the one in
2928 switch (TREE_CODE (op
))
2936 if (((TREE_STATIC (op
) || DECL_EXTERNAL (op
))
2937 && !DECL_DLLIMPORT_P (op
))
2938 || DECL_THREAD_LOCAL_P (op
))
2943 if ((TREE_STATIC (op
) || DECL_EXTERNAL (op
)))
2955 /* Return true if T is function-invariant (internal function, does
2956 not handle arithmetic; that's handled in skip_simple_arithmetic and
2957 tree_invariant_p). */
2959 static bool tree_invariant_p (tree t
);
2962 tree_invariant_p_1 (tree t
)
2966 if (TREE_CONSTANT (t
)
2967 || (TREE_READONLY (t
) && !TREE_SIDE_EFFECTS (t
)))
2970 switch (TREE_CODE (t
))
2976 op
= TREE_OPERAND (t
, 0);
2977 while (handled_component_p (op
))
2979 switch (TREE_CODE (op
))
2982 case ARRAY_RANGE_REF
:
2983 if (!tree_invariant_p (TREE_OPERAND (op
, 1))
2984 || TREE_OPERAND (op
, 2) != NULL_TREE
2985 || TREE_OPERAND (op
, 3) != NULL_TREE
)
2990 if (TREE_OPERAND (op
, 2) != NULL_TREE
)
2996 op
= TREE_OPERAND (op
, 0);
2999 return CONSTANT_CLASS_P (op
) || decl_address_invariant_p (op
);
3008 /* Return true if T is function-invariant. */
3011 tree_invariant_p (tree t
)
3013 tree inner
= skip_simple_arithmetic (t
);
3014 return tree_invariant_p_1 (inner
);
3017 /* Wrap a SAVE_EXPR around EXPR, if appropriate.
3018 Do this to any expression which may be used in more than one place,
3019 but must be evaluated only once.
3021 Normally, expand_expr would reevaluate the expression each time.
3022 Calling save_expr produces something that is evaluated and recorded
3023 the first time expand_expr is called on it. Subsequent calls to
3024 expand_expr just reuse the recorded value.
3026 The call to expand_expr that generates code that actually computes
3027 the value is the first call *at compile time*. Subsequent calls
3028 *at compile time* generate code to use the saved value.
3029 This produces correct result provided that *at run time* control
3030 always flows through the insns made by the first expand_expr
3031 before reaching the other places where the save_expr was evaluated.
3032 You, the caller of save_expr, must make sure this is so.
3034 Constants, and certain read-only nodes, are returned with no
3035 SAVE_EXPR because that is safe. Expressions containing placeholders
3036 are not touched; see tree.def for an explanation of what these
3040 save_expr (tree expr
)
3042 tree t
= fold (expr
);
3045 /* If the tree evaluates to a constant, then we don't want to hide that
3046 fact (i.e. this allows further folding, and direct checks for constants).
3047 However, a read-only object that has side effects cannot be bypassed.
3048 Since it is no problem to reevaluate literals, we just return the
3050 inner
= skip_simple_arithmetic (t
);
3051 if (TREE_CODE (inner
) == ERROR_MARK
)
3054 if (tree_invariant_p_1 (inner
))
3057 /* If INNER contains a PLACEHOLDER_EXPR, we must evaluate it each time, since
3058 it means that the size or offset of some field of an object depends on
3059 the value within another field.
3061 Note that it must not be the case that T contains both a PLACEHOLDER_EXPR
3062 and some variable since it would then need to be both evaluated once and
3063 evaluated more than once. Front-ends must assure this case cannot
3064 happen by surrounding any such subexpressions in their own SAVE_EXPR
3065 and forcing evaluation at the proper time. */
3066 if (contains_placeholder_p (inner
))
3069 t
= build1 (SAVE_EXPR
, TREE_TYPE (expr
), t
);
3070 SET_EXPR_LOCATION (t
, EXPR_LOCATION (expr
));
3072 /* This expression might be placed ahead of a jump to ensure that the
3073 value was computed on both sides of the jump. So make sure it isn't
3074 eliminated as dead. */
3075 TREE_SIDE_EFFECTS (t
) = 1;
3079 /* Look inside EXPR into any simple arithmetic operations. Return the
3080 outermost non-arithmetic or non-invariant node. */
3083 skip_simple_arithmetic (tree expr
)
3085 /* We don't care about whether this can be used as an lvalue in this
3087 while (TREE_CODE (expr
) == NON_LVALUE_EXPR
)
3088 expr
= TREE_OPERAND (expr
, 0);
3090 /* If we have simple operations applied to a SAVE_EXPR or to a SAVE_EXPR and
3091 a constant, it will be more efficient to not make another SAVE_EXPR since
3092 it will allow better simplification and GCSE will be able to merge the
3093 computations if they actually occur. */
3096 if (UNARY_CLASS_P (expr
))
3097 expr
= TREE_OPERAND (expr
, 0);
3098 else if (BINARY_CLASS_P (expr
))
3100 if (tree_invariant_p (TREE_OPERAND (expr
, 1)))
3101 expr
= TREE_OPERAND (expr
, 0);
3102 else if (tree_invariant_p (TREE_OPERAND (expr
, 0)))
3103 expr
= TREE_OPERAND (expr
, 1);
3114 /* Look inside EXPR into simple arithmetic operations involving constants.
3115 Return the outermost non-arithmetic or non-constant node. */
3118 skip_simple_constant_arithmetic (tree expr
)
3120 while (TREE_CODE (expr
) == NON_LVALUE_EXPR
)
3121 expr
= TREE_OPERAND (expr
, 0);
3125 if (UNARY_CLASS_P (expr
))
3126 expr
= TREE_OPERAND (expr
, 0);
3127 else if (BINARY_CLASS_P (expr
))
3129 if (TREE_CONSTANT (TREE_OPERAND (expr
, 1)))
3130 expr
= TREE_OPERAND (expr
, 0);
3131 else if (TREE_CONSTANT (TREE_OPERAND (expr
, 0)))
3132 expr
= TREE_OPERAND (expr
, 1);
3143 /* Return which tree structure is used by T. */
3145 enum tree_node_structure_enum
3146 tree_node_structure (const_tree t
)
3148 const enum tree_code code
= TREE_CODE (t
);
3149 return tree_node_structure_for_code (code
);
3152 /* Set various status flags when building a CALL_EXPR object T. */
3155 process_call_operands (tree t
)
3157 bool side_effects
= TREE_SIDE_EFFECTS (t
);
3158 bool read_only
= false;
3159 int i
= call_expr_flags (t
);
3161 /* Calls have side-effects, except those to const or pure functions. */
3162 if ((i
& ECF_LOOPING_CONST_OR_PURE
) || !(i
& (ECF_CONST
| ECF_PURE
)))
3163 side_effects
= true;
3164 /* Propagate TREE_READONLY of arguments for const functions. */
3168 if (!side_effects
|| read_only
)
3169 for (i
= 1; i
< TREE_OPERAND_LENGTH (t
); i
++)
3171 tree op
= TREE_OPERAND (t
, i
);
3172 if (op
&& TREE_SIDE_EFFECTS (op
))
3173 side_effects
= true;
3174 if (op
&& !TREE_READONLY (op
) && !CONSTANT_CLASS_P (op
))
3178 TREE_SIDE_EFFECTS (t
) = side_effects
;
3179 TREE_READONLY (t
) = read_only
;
3182 /* Return true if EXP contains a PLACEHOLDER_EXPR, i.e. if it represents a
3183 size or offset that depends on a field within a record. */
3186 contains_placeholder_p (const_tree exp
)
3188 enum tree_code code
;
3193 code
= TREE_CODE (exp
);
3194 if (code
== PLACEHOLDER_EXPR
)
3197 switch (TREE_CODE_CLASS (code
))
3200 /* Don't look at any PLACEHOLDER_EXPRs that might be in index or bit
3201 position computations since they will be converted into a
3202 WITH_RECORD_EXPR involving the reference, which will assume
3203 here will be valid. */
3204 return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0));
3206 case tcc_exceptional
:
3207 if (code
== TREE_LIST
)
3208 return (CONTAINS_PLACEHOLDER_P (TREE_VALUE (exp
))
3209 || CONTAINS_PLACEHOLDER_P (TREE_CHAIN (exp
)));
3214 case tcc_comparison
:
3215 case tcc_expression
:
3219 /* Ignoring the first operand isn't quite right, but works best. */
3220 return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 1));
3223 return (CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0))
3224 || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 1))
3225 || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 2)));
3228 /* The save_expr function never wraps anything containing
3229 a PLACEHOLDER_EXPR. */
3236 switch (TREE_CODE_LENGTH (code
))
3239 return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0));
3241 return (CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0))
3242 || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 1)));
3253 const_call_expr_arg_iterator iter
;
3254 FOR_EACH_CONST_CALL_EXPR_ARG (arg
, iter
, exp
)
3255 if (CONTAINS_PLACEHOLDER_P (arg
))
3269 /* Return true if any part of the structure of TYPE involves a PLACEHOLDER_EXPR
3270 directly. This includes size, bounds, qualifiers (for QUAL_UNION_TYPE) and
3274 type_contains_placeholder_1 (const_tree type
)
3276 /* If the size contains a placeholder or the parent type (component type in
3277 the case of arrays) type involves a placeholder, this type does. */
3278 if (CONTAINS_PLACEHOLDER_P (TYPE_SIZE (type
))
3279 || CONTAINS_PLACEHOLDER_P (TYPE_SIZE_UNIT (type
))
3280 || (!POINTER_TYPE_P (type
)
3282 && type_contains_placeholder_p (TREE_TYPE (type
))))
3285 /* Now do type-specific checks. Note that the last part of the check above
3286 greatly limits what we have to do below. */
3287 switch (TREE_CODE (type
))
3295 case REFERENCE_TYPE
:
3304 case FIXED_POINT_TYPE
:
3305 /* Here we just check the bounds. */
3306 return (CONTAINS_PLACEHOLDER_P (TYPE_MIN_VALUE (type
))
3307 || CONTAINS_PLACEHOLDER_P (TYPE_MAX_VALUE (type
)));
3310 /* We have already checked the component type above, so just check the
3312 return type_contains_placeholder_p (TYPE_DOMAIN (type
));
3316 case QUAL_UNION_TYPE
:
3320 for (field
= TYPE_FIELDS (type
); field
; field
= DECL_CHAIN (field
))
3321 if (TREE_CODE (field
) == FIELD_DECL
3322 && (CONTAINS_PLACEHOLDER_P (DECL_FIELD_OFFSET (field
))
3323 || (TREE_CODE (type
) == QUAL_UNION_TYPE
3324 && CONTAINS_PLACEHOLDER_P (DECL_QUALIFIER (field
)))
3325 || type_contains_placeholder_p (TREE_TYPE (field
))))
3336 /* Wrapper around above function used to cache its result. */
3339 type_contains_placeholder_p (tree type
)
3343 /* If the contains_placeholder_bits field has been initialized,
3344 then we know the answer. */
3345 if (TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) > 0)
3346 return TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) - 1;
3348 /* Indicate that we've seen this type node, and the answer is false.
3349 This is what we want to return if we run into recursion via fields. */
3350 TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) = 1;
3352 /* Compute the real value. */
3353 result
= type_contains_placeholder_1 (type
);
3355 /* Store the real value. */
3356 TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) = result
+ 1;
3361 /* Push tree EXP onto vector QUEUE if it is not already present. */
3364 push_without_duplicates (tree exp
, vec
<tree
> *queue
)
3369 FOR_EACH_VEC_ELT (*queue
, i
, iter
)
3370 if (simple_cst_equal (iter
, exp
) == 1)
3374 queue
->safe_push (exp
);
3377 /* Given a tree EXP, find all occurrences of references to fields
3378 in a PLACEHOLDER_EXPR and place them in vector REFS without
3379 duplicates. Also record VAR_DECLs and CONST_DECLs. Note that
3380 we assume here that EXP contains only arithmetic expressions
3381 or CALL_EXPRs with PLACEHOLDER_EXPRs occurring only in their
3385 find_placeholder_in_expr (tree exp
, vec
<tree
> *refs
)
3387 enum tree_code code
= TREE_CODE (exp
);
3391 /* We handle TREE_LIST and COMPONENT_REF separately. */
3392 if (code
== TREE_LIST
)
3394 FIND_PLACEHOLDER_IN_EXPR (TREE_CHAIN (exp
), refs
);
3395 FIND_PLACEHOLDER_IN_EXPR (TREE_VALUE (exp
), refs
);
3397 else if (code
== COMPONENT_REF
)
3399 for (inner
= TREE_OPERAND (exp
, 0);
3400 REFERENCE_CLASS_P (inner
);
3401 inner
= TREE_OPERAND (inner
, 0))
3404 if (TREE_CODE (inner
) == PLACEHOLDER_EXPR
)
3405 push_without_duplicates (exp
, refs
);
3407 FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), refs
);
3410 switch (TREE_CODE_CLASS (code
))
3415 case tcc_declaration
:
3416 /* Variables allocated to static storage can stay. */
3417 if (!TREE_STATIC (exp
))
3418 push_without_duplicates (exp
, refs
);
3421 case tcc_expression
:
3422 /* This is the pattern built in ada/make_aligning_type. */
3423 if (code
== ADDR_EXPR
3424 && TREE_CODE (TREE_OPERAND (exp
, 0)) == PLACEHOLDER_EXPR
)
3426 push_without_duplicates (exp
, refs
);
3430 /* Fall through... */
3432 case tcc_exceptional
:
3435 case tcc_comparison
:
3437 for (i
= 0; i
< TREE_CODE_LENGTH (code
); i
++)
3438 FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, i
), refs
);
3442 for (i
= 1; i
< TREE_OPERAND_LENGTH (exp
); i
++)
3443 FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, i
), refs
);
3451 /* Given a tree EXP, a FIELD_DECL F, and a replacement value R,
3452 return a tree with all occurrences of references to F in a
3453 PLACEHOLDER_EXPR replaced by R. Also handle VAR_DECLs and
3454 CONST_DECLs. Note that we assume here that EXP contains only
3455 arithmetic expressions or CALL_EXPRs with PLACEHOLDER_EXPRs
3456 occurring only in their argument list. */
3459 substitute_in_expr (tree exp
, tree f
, tree r
)
3461 enum tree_code code
= TREE_CODE (exp
);
3462 tree op0
, op1
, op2
, op3
;
3465 /* We handle TREE_LIST and COMPONENT_REF separately. */
3466 if (code
== TREE_LIST
)
3468 op0
= SUBSTITUTE_IN_EXPR (TREE_CHAIN (exp
), f
, r
);
3469 op1
= SUBSTITUTE_IN_EXPR (TREE_VALUE (exp
), f
, r
);
3470 if (op0
== TREE_CHAIN (exp
) && op1
== TREE_VALUE (exp
))
3473 return tree_cons (TREE_PURPOSE (exp
), op1
, op0
);
3475 else if (code
== COMPONENT_REF
)
3479 /* If this expression is getting a value from a PLACEHOLDER_EXPR
3480 and it is the right field, replace it with R. */
3481 for (inner
= TREE_OPERAND (exp
, 0);
3482 REFERENCE_CLASS_P (inner
);
3483 inner
= TREE_OPERAND (inner
, 0))
3487 op1
= TREE_OPERAND (exp
, 1);
3489 if (TREE_CODE (inner
) == PLACEHOLDER_EXPR
&& op1
== f
)
3492 /* If this expression hasn't been completed let, leave it alone. */
3493 if (TREE_CODE (inner
) == PLACEHOLDER_EXPR
&& !TREE_TYPE (inner
))
3496 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3497 if (op0
== TREE_OPERAND (exp
, 0))
3501 = fold_build3 (COMPONENT_REF
, TREE_TYPE (exp
), op0
, op1
, NULL_TREE
);
3504 switch (TREE_CODE_CLASS (code
))
3509 case tcc_declaration
:
3515 case tcc_expression
:
3519 /* Fall through... */
3521 case tcc_exceptional
:
3524 case tcc_comparison
:
3526 switch (TREE_CODE_LENGTH (code
))
3532 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3533 if (op0
== TREE_OPERAND (exp
, 0))
3536 new_tree
= fold_build1 (code
, TREE_TYPE (exp
), op0
);
3540 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3541 op1
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 1), f
, r
);
3543 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1))
3546 new_tree
= fold_build2 (code
, TREE_TYPE (exp
), op0
, op1
);
3550 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3551 op1
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 1), f
, r
);
3552 op2
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 2), f
, r
);
3554 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3555 && op2
== TREE_OPERAND (exp
, 2))
3558 new_tree
= fold_build3 (code
, TREE_TYPE (exp
), op0
, op1
, op2
);
3562 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3563 op1
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 1), f
, r
);
3564 op2
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 2), f
, r
);
3565 op3
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 3), f
, r
);
3567 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3568 && op2
== TREE_OPERAND (exp
, 2)
3569 && op3
== TREE_OPERAND (exp
, 3))
3573 = fold (build4 (code
, TREE_TYPE (exp
), op0
, op1
, op2
, op3
));
3585 new_tree
= NULL_TREE
;
3587 /* If we are trying to replace F with a constant, inline back
3588 functions which do nothing else than computing a value from
3589 the arguments they are passed. This makes it possible to
3590 fold partially or entirely the replacement expression. */
3591 if (CONSTANT_CLASS_P (r
) && code
== CALL_EXPR
)
3593 tree t
= maybe_inline_call_in_expr (exp
);
3595 return SUBSTITUTE_IN_EXPR (t
, f
, r
);
3598 for (i
= 1; i
< TREE_OPERAND_LENGTH (exp
); i
++)
3600 tree op
= TREE_OPERAND (exp
, i
);
3601 tree new_op
= SUBSTITUTE_IN_EXPR (op
, f
, r
);
3605 new_tree
= copy_node (exp
);
3606 TREE_OPERAND (new_tree
, i
) = new_op
;
3612 new_tree
= fold (new_tree
);
3613 if (TREE_CODE (new_tree
) == CALL_EXPR
)
3614 process_call_operands (new_tree
);
3625 TREE_READONLY (new_tree
) |= TREE_READONLY (exp
);
3627 if (code
== INDIRECT_REF
|| code
== ARRAY_REF
|| code
== ARRAY_RANGE_REF
)
3628 TREE_THIS_NOTRAP (new_tree
) |= TREE_THIS_NOTRAP (exp
);
3633 /* Similar, but look for a PLACEHOLDER_EXPR in EXP and find a replacement
3634 for it within OBJ, a tree that is an object or a chain of references. */
3637 substitute_placeholder_in_expr (tree exp
, tree obj
)
3639 enum tree_code code
= TREE_CODE (exp
);
3640 tree op0
, op1
, op2
, op3
;
3643 /* If this is a PLACEHOLDER_EXPR, see if we find a corresponding type
3644 in the chain of OBJ. */
3645 if (code
== PLACEHOLDER_EXPR
)
3647 tree need_type
= TYPE_MAIN_VARIANT (TREE_TYPE (exp
));
3650 for (elt
= obj
; elt
!= 0;
3651 elt
= ((TREE_CODE (elt
) == COMPOUND_EXPR
3652 || TREE_CODE (elt
) == COND_EXPR
)
3653 ? TREE_OPERAND (elt
, 1)
3654 : (REFERENCE_CLASS_P (elt
)
3655 || UNARY_CLASS_P (elt
)
3656 || BINARY_CLASS_P (elt
)
3657 || VL_EXP_CLASS_P (elt
)
3658 || EXPRESSION_CLASS_P (elt
))
3659 ? TREE_OPERAND (elt
, 0) : 0))
3660 if (TYPE_MAIN_VARIANT (TREE_TYPE (elt
)) == need_type
)
3663 for (elt
= obj
; elt
!= 0;
3664 elt
= ((TREE_CODE (elt
) == COMPOUND_EXPR
3665 || TREE_CODE (elt
) == COND_EXPR
)
3666 ? TREE_OPERAND (elt
, 1)
3667 : (REFERENCE_CLASS_P (elt
)
3668 || UNARY_CLASS_P (elt
)
3669 || BINARY_CLASS_P (elt
)
3670 || VL_EXP_CLASS_P (elt
)
3671 || EXPRESSION_CLASS_P (elt
))
3672 ? TREE_OPERAND (elt
, 0) : 0))
3673 if (POINTER_TYPE_P (TREE_TYPE (elt
))
3674 && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (elt
)))
3676 return fold_build1 (INDIRECT_REF
, need_type
, elt
);
3678 /* If we didn't find it, return the original PLACEHOLDER_EXPR. If it
3679 survives until RTL generation, there will be an error. */
3683 /* TREE_LIST is special because we need to look at TREE_VALUE
3684 and TREE_CHAIN, not TREE_OPERANDS. */
3685 else if (code
== TREE_LIST
)
3687 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_CHAIN (exp
), obj
);
3688 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_VALUE (exp
), obj
);
3689 if (op0
== TREE_CHAIN (exp
) && op1
== TREE_VALUE (exp
))
3692 return tree_cons (TREE_PURPOSE (exp
), op1
, op0
);
3695 switch (TREE_CODE_CLASS (code
))
3698 case tcc_declaration
:
3701 case tcc_exceptional
:
3704 case tcc_comparison
:
3705 case tcc_expression
:
3708 switch (TREE_CODE_LENGTH (code
))
3714 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
3715 if (op0
== TREE_OPERAND (exp
, 0))
3718 new_tree
= fold_build1 (code
, TREE_TYPE (exp
), op0
);
3722 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
3723 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 1), obj
);
3725 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1))
3728 new_tree
= fold_build2 (code
, TREE_TYPE (exp
), op0
, op1
);
3732 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
3733 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 1), obj
);
3734 op2
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 2), obj
);
3736 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3737 && op2
== TREE_OPERAND (exp
, 2))
3740 new_tree
= fold_build3 (code
, TREE_TYPE (exp
), op0
, op1
, op2
);
3744 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
3745 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 1), obj
);
3746 op2
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 2), obj
);
3747 op3
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 3), obj
);
3749 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3750 && op2
== TREE_OPERAND (exp
, 2)
3751 && op3
== TREE_OPERAND (exp
, 3))
3755 = fold (build4 (code
, TREE_TYPE (exp
), op0
, op1
, op2
, op3
));
3767 new_tree
= NULL_TREE
;
3769 for (i
= 1; i
< TREE_OPERAND_LENGTH (exp
); i
++)
3771 tree op
= TREE_OPERAND (exp
, i
);
3772 tree new_op
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (op
, obj
);
3776 new_tree
= copy_node (exp
);
3777 TREE_OPERAND (new_tree
, i
) = new_op
;
3783 new_tree
= fold (new_tree
);
3784 if (TREE_CODE (new_tree
) == CALL_EXPR
)
3785 process_call_operands (new_tree
);
3796 TREE_READONLY (new_tree
) |= TREE_READONLY (exp
);
3798 if (code
== INDIRECT_REF
|| code
== ARRAY_REF
|| code
== ARRAY_RANGE_REF
)
3799 TREE_THIS_NOTRAP (new_tree
) |= TREE_THIS_NOTRAP (exp
);
3805 /* Subroutine of stabilize_reference; this is called for subtrees of
3806 references. Any expression with side-effects must be put in a SAVE_EXPR
3807 to ensure that it is only evaluated once.
3809 We don't put SAVE_EXPR nodes around everything, because assigning very
3810 simple expressions to temporaries causes us to miss good opportunities
3811 for optimizations. Among other things, the opportunity to fold in the
3812 addition of a constant into an addressing mode often gets lost, e.g.
3813 "y[i+1] += x;". In general, we take the approach that we should not make
3814 an assignment unless we are forced into it - i.e., that any non-side effect
3815 operator should be allowed, and that cse should take care of coalescing
3816 multiple utterances of the same expression should that prove fruitful. */
3819 stabilize_reference_1 (tree e
)
3822 enum tree_code code
= TREE_CODE (e
);
3824 /* We cannot ignore const expressions because it might be a reference
3825 to a const array but whose index contains side-effects. But we can
3826 ignore things that are actual constant or that already have been
3827 handled by this function. */
3829 if (tree_invariant_p (e
))
3832 switch (TREE_CODE_CLASS (code
))
3834 case tcc_exceptional
:
3836 case tcc_declaration
:
3837 case tcc_comparison
:
3839 case tcc_expression
:
3842 /* If the expression has side-effects, then encase it in a SAVE_EXPR
3843 so that it will only be evaluated once. */
3844 /* The reference (r) and comparison (<) classes could be handled as
3845 below, but it is generally faster to only evaluate them once. */
3846 if (TREE_SIDE_EFFECTS (e
))
3847 return save_expr (e
);
3851 /* Constants need no processing. In fact, we should never reach
3856 /* Division is slow and tends to be compiled with jumps,
3857 especially the division by powers of 2 that is often
3858 found inside of an array reference. So do it just once. */
3859 if (code
== TRUNC_DIV_EXPR
|| code
== TRUNC_MOD_EXPR
3860 || code
== FLOOR_DIV_EXPR
|| code
== FLOOR_MOD_EXPR
3861 || code
== CEIL_DIV_EXPR
|| code
== CEIL_MOD_EXPR
3862 || code
== ROUND_DIV_EXPR
|| code
== ROUND_MOD_EXPR
)
3863 return save_expr (e
);
3864 /* Recursively stabilize each operand. */
3865 result
= build_nt (code
, stabilize_reference_1 (TREE_OPERAND (e
, 0)),
3866 stabilize_reference_1 (TREE_OPERAND (e
, 1)));
3870 /* Recursively stabilize each operand. */
3871 result
= build_nt (code
, stabilize_reference_1 (TREE_OPERAND (e
, 0)));
3878 TREE_TYPE (result
) = TREE_TYPE (e
);
3879 TREE_READONLY (result
) = TREE_READONLY (e
);
3880 TREE_SIDE_EFFECTS (result
) = TREE_SIDE_EFFECTS (e
);
3881 TREE_THIS_VOLATILE (result
) = TREE_THIS_VOLATILE (e
);
3886 /* Stabilize a reference so that we can use it any number of times
3887 without causing its operands to be evaluated more than once.
3888 Returns the stabilized reference. This works by means of save_expr,
3889 so see the caveats in the comments about save_expr.
3891 Also allows conversion expressions whose operands are references.
3892 Any other kind of expression is returned unchanged. */
3895 stabilize_reference (tree ref
)
3898 enum tree_code code
= TREE_CODE (ref
);
3905 /* No action is needed in this case. */
3910 case FIX_TRUNC_EXPR
:
3911 result
= build_nt (code
, stabilize_reference (TREE_OPERAND (ref
, 0)));
3915 result
= build_nt (INDIRECT_REF
,
3916 stabilize_reference_1 (TREE_OPERAND (ref
, 0)));
3920 result
= build_nt (COMPONENT_REF
,
3921 stabilize_reference (TREE_OPERAND (ref
, 0)),
3922 TREE_OPERAND (ref
, 1), NULL_TREE
);
3926 result
= build_nt (BIT_FIELD_REF
,
3927 stabilize_reference (TREE_OPERAND (ref
, 0)),
3928 TREE_OPERAND (ref
, 1), TREE_OPERAND (ref
, 2));
3932 result
= build_nt (ARRAY_REF
,
3933 stabilize_reference (TREE_OPERAND (ref
, 0)),
3934 stabilize_reference_1 (TREE_OPERAND (ref
, 1)),
3935 TREE_OPERAND (ref
, 2), TREE_OPERAND (ref
, 3));
3938 case ARRAY_RANGE_REF
:
3939 result
= build_nt (ARRAY_RANGE_REF
,
3940 stabilize_reference (TREE_OPERAND (ref
, 0)),
3941 stabilize_reference_1 (TREE_OPERAND (ref
, 1)),
3942 TREE_OPERAND (ref
, 2), TREE_OPERAND (ref
, 3));
3946 /* We cannot wrap the first expression in a SAVE_EXPR, as then
3947 it wouldn't be ignored. This matters when dealing with
3949 return stabilize_reference_1 (ref
);
3951 /* If arg isn't a kind of lvalue we recognize, make no change.
3952 Caller should recognize the error for an invalid lvalue. */
3957 return error_mark_node
;
3960 TREE_TYPE (result
) = TREE_TYPE (ref
);
3961 TREE_READONLY (result
) = TREE_READONLY (ref
);
3962 TREE_SIDE_EFFECTS (result
) = TREE_SIDE_EFFECTS (ref
);
3963 TREE_THIS_VOLATILE (result
) = TREE_THIS_VOLATILE (ref
);
3968 /* Low-level constructors for expressions. */
3970 /* A helper function for build1 and constant folders. Set TREE_CONSTANT,
3971 and TREE_SIDE_EFFECTS for an ADDR_EXPR. */
3974 recompute_tree_invariant_for_addr_expr (tree t
)
3977 bool tc
= true, se
= false;
3979 /* We started out assuming this address is both invariant and constant, but
3980 does not have side effects. Now go down any handled components and see if
3981 any of them involve offsets that are either non-constant or non-invariant.
3982 Also check for side-effects.
3984 ??? Note that this code makes no attempt to deal with the case where
3985 taking the address of something causes a copy due to misalignment. */
3987 #define UPDATE_FLAGS(NODE) \
3988 do { tree _node = (NODE); \
3989 if (_node && !TREE_CONSTANT (_node)) tc = false; \
3990 if (_node && TREE_SIDE_EFFECTS (_node)) se = true; } while (0)
3992 for (node
= TREE_OPERAND (t
, 0); handled_component_p (node
);
3993 node
= TREE_OPERAND (node
, 0))
3995 /* If the first operand doesn't have an ARRAY_TYPE, this is a bogus
3996 array reference (probably made temporarily by the G++ front end),
3997 so ignore all the operands. */
3998 if ((TREE_CODE (node
) == ARRAY_REF
3999 || TREE_CODE (node
) == ARRAY_RANGE_REF
)
4000 && TREE_CODE (TREE_TYPE (TREE_OPERAND (node
, 0))) == ARRAY_TYPE
)
4002 UPDATE_FLAGS (TREE_OPERAND (node
, 1));
4003 if (TREE_OPERAND (node
, 2))
4004 UPDATE_FLAGS (TREE_OPERAND (node
, 2));
4005 if (TREE_OPERAND (node
, 3))
4006 UPDATE_FLAGS (TREE_OPERAND (node
, 3));
4008 /* Likewise, just because this is a COMPONENT_REF doesn't mean we have a
4009 FIELD_DECL, apparently. The G++ front end can put something else
4010 there, at least temporarily. */
4011 else if (TREE_CODE (node
) == COMPONENT_REF
4012 && TREE_CODE (TREE_OPERAND (node
, 1)) == FIELD_DECL
)
4014 if (TREE_OPERAND (node
, 2))
4015 UPDATE_FLAGS (TREE_OPERAND (node
, 2));
4019 node
= lang_hooks
.expr_to_decl (node
, &tc
, &se
);
4021 /* Now see what's inside. If it's an INDIRECT_REF, copy our properties from
4022 the address, since &(*a)->b is a form of addition. If it's a constant, the
4023 address is constant too. If it's a decl, its address is constant if the
4024 decl is static. Everything else is not constant and, furthermore,
4025 taking the address of a volatile variable is not volatile. */
4026 if (TREE_CODE (node
) == INDIRECT_REF
4027 || TREE_CODE (node
) == MEM_REF
)
4028 UPDATE_FLAGS (TREE_OPERAND (node
, 0));
4029 else if (CONSTANT_CLASS_P (node
))
4031 else if (DECL_P (node
))
4032 tc
&= (staticp (node
) != NULL_TREE
);
4036 se
|= TREE_SIDE_EFFECTS (node
);
4040 TREE_CONSTANT (t
) = tc
;
4041 TREE_SIDE_EFFECTS (t
) = se
;
4045 /* Build an expression of code CODE, data type TYPE, and operands as
4046 specified. Expressions and reference nodes can be created this way.
4047 Constants, decls, types and misc nodes cannot be.
4049 We define 5 non-variadic functions, from 0 to 4 arguments. This is
4050 enough for all extant tree codes. */
4053 build0_stat (enum tree_code code
, tree tt MEM_STAT_DECL
)
4057 gcc_assert (TREE_CODE_LENGTH (code
) == 0);
4059 t
= make_node_stat (code PASS_MEM_STAT
);
4066 build1_stat (enum tree_code code
, tree type
, tree node MEM_STAT_DECL
)
4068 int length
= sizeof (struct tree_exp
);
4071 record_node_allocation_statistics (code
, length
);
4073 gcc_assert (TREE_CODE_LENGTH (code
) == 1);
4075 t
= ggc_alloc_tree_node_stat (length PASS_MEM_STAT
);
4077 memset (t
, 0, sizeof (struct tree_common
));
4079 TREE_SET_CODE (t
, code
);
4081 TREE_TYPE (t
) = type
;
4082 SET_EXPR_LOCATION (t
, UNKNOWN_LOCATION
);
4083 TREE_OPERAND (t
, 0) = node
;
4084 if (node
&& !TYPE_P (node
))
4086 TREE_SIDE_EFFECTS (t
) = TREE_SIDE_EFFECTS (node
);
4087 TREE_READONLY (t
) = TREE_READONLY (node
);
4090 if (TREE_CODE_CLASS (code
) == tcc_statement
)
4091 TREE_SIDE_EFFECTS (t
) = 1;
4095 /* All of these have side-effects, no matter what their
4097 TREE_SIDE_EFFECTS (t
) = 1;
4098 TREE_READONLY (t
) = 0;
4102 /* Whether a dereference is readonly has nothing to do with whether
4103 its operand is readonly. */
4104 TREE_READONLY (t
) = 0;
4109 recompute_tree_invariant_for_addr_expr (t
);
4113 if ((TREE_CODE_CLASS (code
) == tcc_unary
|| code
== VIEW_CONVERT_EXPR
)
4114 && node
&& !TYPE_P (node
)
4115 && TREE_CONSTANT (node
))
4116 TREE_CONSTANT (t
) = 1;
4117 if (TREE_CODE_CLASS (code
) == tcc_reference
4118 && node
&& TREE_THIS_VOLATILE (node
))
4119 TREE_THIS_VOLATILE (t
) = 1;
4126 #define PROCESS_ARG(N) \
4128 TREE_OPERAND (t, N) = arg##N; \
4129 if (arg##N &&!TYPE_P (arg##N)) \
4131 if (TREE_SIDE_EFFECTS (arg##N)) \
4133 if (!TREE_READONLY (arg##N) \
4134 && !CONSTANT_CLASS_P (arg##N)) \
4135 (void) (read_only = 0); \
4136 if (!TREE_CONSTANT (arg##N)) \
4137 (void) (constant = 0); \
4142 build2_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1 MEM_STAT_DECL
)
4144 bool constant
, read_only
, side_effects
;
4147 gcc_assert (TREE_CODE_LENGTH (code
) == 2);
4149 if ((code
== MINUS_EXPR
|| code
== PLUS_EXPR
|| code
== MULT_EXPR
)
4150 && arg0
&& arg1
&& tt
&& POINTER_TYPE_P (tt
)
4151 /* When sizetype precision doesn't match that of pointers
4152 we need to be able to build explicit extensions or truncations
4153 of the offset argument. */
4154 && TYPE_PRECISION (sizetype
) == TYPE_PRECISION (tt
))
4155 gcc_assert (TREE_CODE (arg0
) == INTEGER_CST
4156 && TREE_CODE (arg1
) == INTEGER_CST
);
4158 if (code
== POINTER_PLUS_EXPR
&& arg0
&& arg1
&& tt
)
4159 gcc_assert (POINTER_TYPE_P (tt
) && POINTER_TYPE_P (TREE_TYPE (arg0
))
4160 && ptrofftype_p (TREE_TYPE (arg1
)));
4162 t
= make_node_stat (code PASS_MEM_STAT
);
4165 /* Below, we automatically set TREE_SIDE_EFFECTS and TREE_READONLY for the
4166 result based on those same flags for the arguments. But if the
4167 arguments aren't really even `tree' expressions, we shouldn't be trying
4170 /* Expressions without side effects may be constant if their
4171 arguments are as well. */
4172 constant
= (TREE_CODE_CLASS (code
) == tcc_comparison
4173 || TREE_CODE_CLASS (code
) == tcc_binary
);
4175 side_effects
= TREE_SIDE_EFFECTS (t
);
4180 TREE_READONLY (t
) = read_only
;
4181 TREE_CONSTANT (t
) = constant
;
4182 TREE_SIDE_EFFECTS (t
) = side_effects
;
4183 TREE_THIS_VOLATILE (t
)
4184 = (TREE_CODE_CLASS (code
) == tcc_reference
4185 && arg0
&& TREE_THIS_VOLATILE (arg0
));
4192 build3_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
4193 tree arg2 MEM_STAT_DECL
)
4195 bool constant
, read_only
, side_effects
;
4198 gcc_assert (TREE_CODE_LENGTH (code
) == 3);
4199 gcc_assert (TREE_CODE_CLASS (code
) != tcc_vl_exp
);
4201 t
= make_node_stat (code PASS_MEM_STAT
);
4206 /* As a special exception, if COND_EXPR has NULL branches, we
4207 assume that it is a gimple statement and always consider
4208 it to have side effects. */
4209 if (code
== COND_EXPR
4210 && tt
== void_type_node
4211 && arg1
== NULL_TREE
4212 && arg2
== NULL_TREE
)
4213 side_effects
= true;
4215 side_effects
= TREE_SIDE_EFFECTS (t
);
4221 if (code
== COND_EXPR
)
4222 TREE_READONLY (t
) = read_only
;
4224 TREE_SIDE_EFFECTS (t
) = side_effects
;
4225 TREE_THIS_VOLATILE (t
)
4226 = (TREE_CODE_CLASS (code
) == tcc_reference
4227 && arg0
&& TREE_THIS_VOLATILE (arg0
));
4233 build4_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
4234 tree arg2
, tree arg3 MEM_STAT_DECL
)
4236 bool constant
, read_only
, side_effects
;
4239 gcc_assert (TREE_CODE_LENGTH (code
) == 4);
4241 t
= make_node_stat (code PASS_MEM_STAT
);
4244 side_effects
= TREE_SIDE_EFFECTS (t
);
4251 TREE_SIDE_EFFECTS (t
) = side_effects
;
4252 TREE_THIS_VOLATILE (t
)
4253 = (TREE_CODE_CLASS (code
) == tcc_reference
4254 && arg0
&& TREE_THIS_VOLATILE (arg0
));
4260 build5_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
4261 tree arg2
, tree arg3
, tree arg4 MEM_STAT_DECL
)
4263 bool constant
, read_only
, side_effects
;
4266 gcc_assert (TREE_CODE_LENGTH (code
) == 5);
4268 t
= make_node_stat (code PASS_MEM_STAT
);
4271 side_effects
= TREE_SIDE_EFFECTS (t
);
4279 TREE_SIDE_EFFECTS (t
) = side_effects
;
4280 TREE_THIS_VOLATILE (t
)
4281 = (TREE_CODE_CLASS (code
) == tcc_reference
4282 && arg0
&& TREE_THIS_VOLATILE (arg0
));
4287 /* Build a simple MEM_REF tree with the sematics of a plain INDIRECT_REF
4288 on the pointer PTR. */
4291 build_simple_mem_ref_loc (location_t loc
, tree ptr
)
4293 HOST_WIDE_INT offset
= 0;
4294 tree ptype
= TREE_TYPE (ptr
);
4296 /* For convenience allow addresses that collapse to a simple base
4298 if (TREE_CODE (ptr
) == ADDR_EXPR
4299 && (handled_component_p (TREE_OPERAND (ptr
, 0))
4300 || TREE_CODE (TREE_OPERAND (ptr
, 0)) == MEM_REF
))
4302 ptr
= get_addr_base_and_unit_offset (TREE_OPERAND (ptr
, 0), &offset
);
4304 ptr
= build_fold_addr_expr (ptr
);
4305 gcc_assert (is_gimple_reg (ptr
) || is_gimple_min_invariant (ptr
));
4307 tem
= build2 (MEM_REF
, TREE_TYPE (ptype
),
4308 ptr
, build_int_cst (ptype
, offset
));
4309 SET_EXPR_LOCATION (tem
, loc
);
4313 /* Return the constant offset of a MEM_REF or TARGET_MEM_REF tree T. */
4316 mem_ref_offset (const_tree t
)
4318 tree toff
= TREE_OPERAND (t
, 1);
4319 return tree_to_double_int (toff
).sext (TYPE_PRECISION (TREE_TYPE (toff
)));
4322 /* Return an invariant ADDR_EXPR of type TYPE taking the address of BASE
4323 offsetted by OFFSET units. */
4326 build_invariant_address (tree type
, tree base
, HOST_WIDE_INT offset
)
4328 tree ref
= fold_build2 (MEM_REF
, TREE_TYPE (type
),
4329 build_fold_addr_expr (base
),
4330 build_int_cst (ptr_type_node
, offset
));
4331 tree addr
= build1 (ADDR_EXPR
, type
, ref
);
4332 recompute_tree_invariant_for_addr_expr (addr
);
4336 /* Similar except don't specify the TREE_TYPE
4337 and leave the TREE_SIDE_EFFECTS as 0.
4338 It is permissible for arguments to be null,
4339 or even garbage if their values do not matter. */
4342 build_nt (enum tree_code code
, ...)
4349 gcc_assert (TREE_CODE_CLASS (code
) != tcc_vl_exp
);
4353 t
= make_node (code
);
4354 length
= TREE_CODE_LENGTH (code
);
4356 for (i
= 0; i
< length
; i
++)
4357 TREE_OPERAND (t
, i
) = va_arg (p
, tree
);
4363 /* Similar to build_nt, but for creating a CALL_EXPR object with a
4367 build_nt_call_vec (tree fn
, vec
<tree
, va_gc
> *args
)
4372 ret
= build_vl_exp (CALL_EXPR
, vec_safe_length (args
) + 3);
4373 CALL_EXPR_FN (ret
) = fn
;
4374 CALL_EXPR_STATIC_CHAIN (ret
) = NULL_TREE
;
4375 FOR_EACH_VEC_SAFE_ELT (args
, ix
, t
)
4376 CALL_EXPR_ARG (ret
, ix
) = t
;
4380 /* Create a DECL_... node of code CODE, name NAME and data type TYPE.
4381 We do NOT enter this node in any sort of symbol table.
4383 LOC is the location of the decl.
4385 layout_decl is used to set up the decl's storage layout.
4386 Other slots are initialized to 0 or null pointers. */
4389 build_decl_stat (location_t loc
, enum tree_code code
, tree name
,
4390 tree type MEM_STAT_DECL
)
4394 t
= make_node_stat (code PASS_MEM_STAT
);
4395 DECL_SOURCE_LOCATION (t
) = loc
;
4397 /* if (type == error_mark_node)
4398 type = integer_type_node; */
4399 /* That is not done, deliberately, so that having error_mark_node
4400 as the type can suppress useless errors in the use of this variable. */
4402 DECL_NAME (t
) = name
;
4403 TREE_TYPE (t
) = type
;
4405 if (code
== VAR_DECL
|| code
== PARM_DECL
|| code
== RESULT_DECL
)
4411 /* Builds and returns function declaration with NAME and TYPE. */
4414 build_fn_decl (const char *name
, tree type
)
4416 tree id
= get_identifier (name
);
4417 tree decl
= build_decl (input_location
, FUNCTION_DECL
, id
, type
);
4419 DECL_EXTERNAL (decl
) = 1;
4420 TREE_PUBLIC (decl
) = 1;
4421 DECL_ARTIFICIAL (decl
) = 1;
4422 TREE_NOTHROW (decl
) = 1;
4427 vec
<tree
, va_gc
> *all_translation_units
;
4429 /* Builds a new translation-unit decl with name NAME, queues it in the
4430 global list of translation-unit decls and returns it. */
4433 build_translation_unit_decl (tree name
)
4435 tree tu
= build_decl (UNKNOWN_LOCATION
, TRANSLATION_UNIT_DECL
,
4437 TRANSLATION_UNIT_LANGUAGE (tu
) = lang_hooks
.name
;
4438 vec_safe_push (all_translation_units
, tu
);
4443 /* BLOCK nodes are used to represent the structure of binding contours
4444 and declarations, once those contours have been exited and their contents
4445 compiled. This information is used for outputting debugging info. */
4448 build_block (tree vars
, tree subblocks
, tree supercontext
, tree chain
)
4450 tree block
= make_node (BLOCK
);
4452 BLOCK_VARS (block
) = vars
;
4453 BLOCK_SUBBLOCKS (block
) = subblocks
;
4454 BLOCK_SUPERCONTEXT (block
) = supercontext
;
4455 BLOCK_CHAIN (block
) = chain
;
4460 /* Like SET_EXPR_LOCATION, but make sure the tree can have a location.
4462 LOC is the location to use in tree T. */
4465 protected_set_expr_location (tree t
, location_t loc
)
4467 if (t
&& CAN_HAVE_LOCATION_P (t
))
4468 SET_EXPR_LOCATION (t
, loc
);
4471 /* Return a declaration like DDECL except that its DECL_ATTRIBUTES
4475 build_decl_attribute_variant (tree ddecl
, tree attribute
)
4477 DECL_ATTRIBUTES (ddecl
) = attribute
;
4481 /* Borrowed from hashtab.c iterative_hash implementation. */
4482 #define mix(a,b,c) \
4484 a -= b; a -= c; a ^= (c>>13); \
4485 b -= c; b -= a; b ^= (a<< 8); \
4486 c -= a; c -= b; c ^= ((b&0xffffffff)>>13); \
4487 a -= b; a -= c; a ^= ((c&0xffffffff)>>12); \
4488 b -= c; b -= a; b = (b ^ (a<<16)) & 0xffffffff; \
4489 c -= a; c -= b; c = (c ^ (b>> 5)) & 0xffffffff; \
4490 a -= b; a -= c; a = (a ^ (c>> 3)) & 0xffffffff; \
4491 b -= c; b -= a; b = (b ^ (a<<10)) & 0xffffffff; \
4492 c -= a; c -= b; c = (c ^ (b>>15)) & 0xffffffff; \
4496 /* Produce good hash value combining VAL and VAL2. */
4498 iterative_hash_hashval_t (hashval_t val
, hashval_t val2
)
4500 /* the golden ratio; an arbitrary value. */
4501 hashval_t a
= 0x9e3779b9;
4507 /* Produce good hash value combining VAL and VAL2. */
4509 iterative_hash_host_wide_int (HOST_WIDE_INT val
, hashval_t val2
)
4511 if (sizeof (HOST_WIDE_INT
) == sizeof (hashval_t
))
4512 return iterative_hash_hashval_t (val
, val2
);
4515 hashval_t a
= (hashval_t
) val
;
4516 /* Avoid warnings about shifting of more than the width of the type on
4517 hosts that won't execute this path. */
4519 hashval_t b
= (hashval_t
) (val
>> (sizeof (hashval_t
) * 8 + zero
));
4521 if (sizeof (HOST_WIDE_INT
) > 2 * sizeof (hashval_t
))
4523 hashval_t a
= (hashval_t
) (val
>> (sizeof (hashval_t
) * 16 + zero
));
4524 hashval_t b
= (hashval_t
) (val
>> (sizeof (hashval_t
) * 24 + zero
));
4531 /* Return a type like TTYPE except that its TYPE_ATTRIBUTE
4532 is ATTRIBUTE and its qualifiers are QUALS.
4534 Record such modified types already made so we don't make duplicates. */
4537 build_type_attribute_qual_variant (tree ttype
, tree attribute
, int quals
)
4539 if (! attribute_list_equal (TYPE_ATTRIBUTES (ttype
), attribute
))
4541 hashval_t hashcode
= 0;
4543 enum tree_code code
= TREE_CODE (ttype
);
4545 /* Building a distinct copy of a tagged type is inappropriate; it
4546 causes breakage in code that expects there to be a one-to-one
4547 relationship between a struct and its fields.
4548 build_duplicate_type is another solution (as used in
4549 handle_transparent_union_attribute), but that doesn't play well
4550 with the stronger C++ type identity model. */
4551 if (TREE_CODE (ttype
) == RECORD_TYPE
4552 || TREE_CODE (ttype
) == UNION_TYPE
4553 || TREE_CODE (ttype
) == QUAL_UNION_TYPE
4554 || TREE_CODE (ttype
) == ENUMERAL_TYPE
)
4556 warning (OPT_Wattributes
,
4557 "ignoring attributes applied to %qT after definition",
4558 TYPE_MAIN_VARIANT (ttype
));
4559 return build_qualified_type (ttype
, quals
);
4562 ttype
= build_qualified_type (ttype
, TYPE_UNQUALIFIED
);
4563 ntype
= build_distinct_type_copy (ttype
);
4565 TYPE_ATTRIBUTES (ntype
) = attribute
;
4567 hashcode
= iterative_hash_object (code
, hashcode
);
4568 if (TREE_TYPE (ntype
))
4569 hashcode
= iterative_hash_object (TYPE_HASH (TREE_TYPE (ntype
)),
4571 hashcode
= attribute_hash_list (attribute
, hashcode
);
4573 switch (TREE_CODE (ntype
))
4576 hashcode
= type_hash_list (TYPE_ARG_TYPES (ntype
), hashcode
);
4579 if (TYPE_DOMAIN (ntype
))
4580 hashcode
= iterative_hash_object (TYPE_HASH (TYPE_DOMAIN (ntype
)),
4584 hashcode
= iterative_hash_object
4585 (TREE_INT_CST_LOW (TYPE_MAX_VALUE (ntype
)), hashcode
);
4586 hashcode
= iterative_hash_object
4587 (TREE_INT_CST_HIGH (TYPE_MAX_VALUE (ntype
)), hashcode
);
4590 case FIXED_POINT_TYPE
:
4592 unsigned int precision
= TYPE_PRECISION (ntype
);
4593 hashcode
= iterative_hash_object (precision
, hashcode
);
4600 ntype
= type_hash_canon (hashcode
, ntype
);
4602 /* If the target-dependent attributes make NTYPE different from
4603 its canonical type, we will need to use structural equality
4604 checks for this type. */
4605 if (TYPE_STRUCTURAL_EQUALITY_P (ttype
)
4606 || !comp_type_attributes (ntype
, ttype
))
4607 SET_TYPE_STRUCTURAL_EQUALITY (ntype
);
4608 else if (TYPE_CANONICAL (ntype
) == ntype
)
4609 TYPE_CANONICAL (ntype
) = TYPE_CANONICAL (ttype
);
4611 ttype
= build_qualified_type (ntype
, quals
);
4613 else if (TYPE_QUALS (ttype
) != quals
)
4614 ttype
= build_qualified_type (ttype
, quals
);
4619 /* Check if "omp declare simd" attribute arguments, CLAUSES1 and CLAUSES2, are
4623 omp_declare_simd_clauses_equal (tree clauses1
, tree clauses2
)
4626 for (cl1
= clauses1
, cl2
= clauses2
;
4628 cl1
= OMP_CLAUSE_CHAIN (cl1
), cl2
= OMP_CLAUSE_CHAIN (cl2
))
4630 if (OMP_CLAUSE_CODE (cl1
) != OMP_CLAUSE_CODE (cl2
))
4632 if (OMP_CLAUSE_CODE (cl1
) != OMP_CLAUSE_SIMDLEN
)
4634 if (simple_cst_equal (OMP_CLAUSE_DECL (cl1
),
4635 OMP_CLAUSE_DECL (cl2
)) != 1)
4638 switch (OMP_CLAUSE_CODE (cl1
))
4640 case OMP_CLAUSE_ALIGNED
:
4641 if (simple_cst_equal (OMP_CLAUSE_ALIGNED_ALIGNMENT (cl1
),
4642 OMP_CLAUSE_ALIGNED_ALIGNMENT (cl2
)) != 1)
4645 case OMP_CLAUSE_LINEAR
:
4646 if (simple_cst_equal (OMP_CLAUSE_LINEAR_STEP (cl1
),
4647 OMP_CLAUSE_LINEAR_STEP (cl2
)) != 1)
4650 case OMP_CLAUSE_SIMDLEN
:
4651 if (simple_cst_equal (OMP_CLAUSE_SIMDLEN_EXPR (cl1
),
4652 OMP_CLAUSE_SIMDLEN_EXPR (cl2
)) != 1)
4661 /* Compare two constructor-element-type constants. Return 1 if the lists
4662 are known to be equal; otherwise return 0. */
4665 simple_cst_list_equal (const_tree l1
, const_tree l2
)
4667 while (l1
!= NULL_TREE
&& l2
!= NULL_TREE
)
4669 if (simple_cst_equal (TREE_VALUE (l1
), TREE_VALUE (l2
)) != 1)
4672 l1
= TREE_CHAIN (l1
);
4673 l2
= TREE_CHAIN (l2
);
4679 /* Compare two attributes for their value identity. Return true if the
4680 attribute values are known to be equal; otherwise return false.
4684 attribute_value_equal (const_tree attr1
, const_tree attr2
)
4686 if (TREE_VALUE (attr1
) == TREE_VALUE (attr2
))
4689 if (TREE_VALUE (attr1
) != NULL_TREE
4690 && TREE_CODE (TREE_VALUE (attr1
)) == TREE_LIST
4691 && TREE_VALUE (attr2
) != NULL
4692 && TREE_CODE (TREE_VALUE (attr2
)) == TREE_LIST
)
4693 return (simple_cst_list_equal (TREE_VALUE (attr1
),
4694 TREE_VALUE (attr2
)) == 1);
4696 if ((flag_openmp
|| flag_openmp_simd
)
4697 && TREE_VALUE (attr1
) && TREE_VALUE (attr2
)
4698 && TREE_CODE (TREE_VALUE (attr1
)) == OMP_CLAUSE
4699 && TREE_CODE (TREE_VALUE (attr2
)) == OMP_CLAUSE
)
4700 return omp_declare_simd_clauses_equal (TREE_VALUE (attr1
),
4701 TREE_VALUE (attr2
));
4703 return (simple_cst_equal (TREE_VALUE (attr1
), TREE_VALUE (attr2
)) == 1);
4706 /* Return 0 if the attributes for two types are incompatible, 1 if they
4707 are compatible, and 2 if they are nearly compatible (which causes a
4708 warning to be generated). */
4710 comp_type_attributes (const_tree type1
, const_tree type2
)
4712 const_tree a1
= TYPE_ATTRIBUTES (type1
);
4713 const_tree a2
= TYPE_ATTRIBUTES (type2
);
4718 for (a
= a1
; a
!= NULL_TREE
; a
= TREE_CHAIN (a
))
4720 const struct attribute_spec
*as
;
4723 as
= lookup_attribute_spec (get_attribute_name (a
));
4724 if (!as
|| as
->affects_type_identity
== false)
4727 attr
= lookup_attribute (as
->name
, CONST_CAST_TREE (a2
));
4728 if (!attr
|| !attribute_value_equal (a
, attr
))
4733 for (a
= a2
; a
!= NULL_TREE
; a
= TREE_CHAIN (a
))
4735 const struct attribute_spec
*as
;
4737 as
= lookup_attribute_spec (get_attribute_name (a
));
4738 if (!as
|| as
->affects_type_identity
== false)
4741 if (!lookup_attribute (as
->name
, CONST_CAST_TREE (a1
)))
4743 /* We don't need to compare trees again, as we did this
4744 already in first loop. */
4746 /* All types - affecting identity - are equal, so
4747 there is no need to call target hook for comparison. */
4751 /* As some type combinations - like default calling-convention - might
4752 be compatible, we have to call the target hook to get the final result. */
4753 return targetm
.comp_type_attributes (type1
, type2
);
4756 /* Return a type like TTYPE except that its TYPE_ATTRIBUTE
4759 Record such modified types already made so we don't make duplicates. */
4762 build_type_attribute_variant (tree ttype
, tree attribute
)
4764 return build_type_attribute_qual_variant (ttype
, attribute
,
4765 TYPE_QUALS (ttype
));
4769 /* Reset the expression *EXPR_P, a size or position.
4771 ??? We could reset all non-constant sizes or positions. But it's cheap
4772 enough to not do so and refrain from adding workarounds to dwarf2out.c.
4774 We need to reset self-referential sizes or positions because they cannot
4775 be gimplified and thus can contain a CALL_EXPR after the gimplification
4776 is finished, which will run afoul of LTO streaming. And they need to be
4777 reset to something essentially dummy but not constant, so as to preserve
4778 the properties of the object they are attached to. */
4781 free_lang_data_in_one_sizepos (tree
*expr_p
)
4783 tree expr
= *expr_p
;
4784 if (CONTAINS_PLACEHOLDER_P (expr
))
4785 *expr_p
= build0 (PLACEHOLDER_EXPR
, TREE_TYPE (expr
));
4789 /* Reset all the fields in a binfo node BINFO. We only keep
4790 BINFO_VTABLE, which is used by gimple_fold_obj_type_ref. */
4793 free_lang_data_in_binfo (tree binfo
)
4798 gcc_assert (TREE_CODE (binfo
) == TREE_BINFO
);
4800 BINFO_VIRTUALS (binfo
) = NULL_TREE
;
4801 BINFO_BASE_ACCESSES (binfo
) = NULL
;
4802 BINFO_INHERITANCE_CHAIN (binfo
) = NULL_TREE
;
4803 BINFO_SUBVTT_INDEX (binfo
) = NULL_TREE
;
4805 FOR_EACH_VEC_ELT (*BINFO_BASE_BINFOS (binfo
), i
, t
)
4806 free_lang_data_in_binfo (t
);
4810 /* Reset all language specific information still present in TYPE. */
4813 free_lang_data_in_type (tree type
)
4815 gcc_assert (TYPE_P (type
));
4817 /* Give the FE a chance to remove its own data first. */
4818 lang_hooks
.free_lang_data (type
);
4820 TREE_LANG_FLAG_0 (type
) = 0;
4821 TREE_LANG_FLAG_1 (type
) = 0;
4822 TREE_LANG_FLAG_2 (type
) = 0;
4823 TREE_LANG_FLAG_3 (type
) = 0;
4824 TREE_LANG_FLAG_4 (type
) = 0;
4825 TREE_LANG_FLAG_5 (type
) = 0;
4826 TREE_LANG_FLAG_6 (type
) = 0;
4828 if (TREE_CODE (type
) == FUNCTION_TYPE
)
4830 /* Remove the const and volatile qualifiers from arguments. The
4831 C++ front end removes them, but the C front end does not,
4832 leading to false ODR violation errors when merging two
4833 instances of the same function signature compiled by
4834 different front ends. */
4837 for (p
= TYPE_ARG_TYPES (type
); p
; p
= TREE_CHAIN (p
))
4839 tree arg_type
= TREE_VALUE (p
);
4841 if (TYPE_READONLY (arg_type
) || TYPE_VOLATILE (arg_type
))
4843 int quals
= TYPE_QUALS (arg_type
)
4845 & ~TYPE_QUAL_VOLATILE
;
4846 TREE_VALUE (p
) = build_qualified_type (arg_type
, quals
);
4847 free_lang_data_in_type (TREE_VALUE (p
));
4852 /* Remove members that are not actually FIELD_DECLs from the field
4853 list of an aggregate. These occur in C++. */
4854 if (RECORD_OR_UNION_TYPE_P (type
))
4858 /* Note that TYPE_FIELDS can be shared across distinct
4859 TREE_TYPEs. Therefore, if the first field of TYPE_FIELDS is
4860 to be removed, we cannot set its TREE_CHAIN to NULL.
4861 Otherwise, we would not be able to find all the other fields
4862 in the other instances of this TREE_TYPE.
4864 This was causing an ICE in testsuite/g++.dg/lto/20080915.C. */
4866 member
= TYPE_FIELDS (type
);
4869 if (TREE_CODE (member
) == FIELD_DECL
4870 || TREE_CODE (member
) == TYPE_DECL
)
4873 TREE_CHAIN (prev
) = member
;
4875 TYPE_FIELDS (type
) = member
;
4879 member
= TREE_CHAIN (member
);
4883 TREE_CHAIN (prev
) = NULL_TREE
;
4885 TYPE_FIELDS (type
) = NULL_TREE
;
4887 TYPE_METHODS (type
) = NULL_TREE
;
4888 if (TYPE_BINFO (type
))
4889 free_lang_data_in_binfo (TYPE_BINFO (type
));
4893 /* For non-aggregate types, clear out the language slot (which
4894 overloads TYPE_BINFO). */
4895 TYPE_LANG_SLOT_1 (type
) = NULL_TREE
;
4897 if (INTEGRAL_TYPE_P (type
)
4898 || SCALAR_FLOAT_TYPE_P (type
)
4899 || FIXED_POINT_TYPE_P (type
))
4901 free_lang_data_in_one_sizepos (&TYPE_MIN_VALUE (type
));
4902 free_lang_data_in_one_sizepos (&TYPE_MAX_VALUE (type
));
4906 free_lang_data_in_one_sizepos (&TYPE_SIZE (type
));
4907 free_lang_data_in_one_sizepos (&TYPE_SIZE_UNIT (type
));
4909 if (TYPE_CONTEXT (type
)
4910 && TREE_CODE (TYPE_CONTEXT (type
)) == BLOCK
)
4912 tree ctx
= TYPE_CONTEXT (type
);
4915 ctx
= BLOCK_SUPERCONTEXT (ctx
);
4917 while (ctx
&& TREE_CODE (ctx
) == BLOCK
);
4918 TYPE_CONTEXT (type
) = ctx
;
4923 /* Return true if DECL may need an assembler name to be set. */
4926 need_assembler_name_p (tree decl
)
4928 /* Only FUNCTION_DECLs and VAR_DECLs are considered. */
4929 if (TREE_CODE (decl
) != FUNCTION_DECL
4930 && TREE_CODE (decl
) != VAR_DECL
)
4933 /* If DECL already has its assembler name set, it does not need a
4935 if (!HAS_DECL_ASSEMBLER_NAME_P (decl
)
4936 || DECL_ASSEMBLER_NAME_SET_P (decl
))
4939 /* Abstract decls do not need an assembler name. */
4940 if (DECL_ABSTRACT (decl
))
4943 /* For VAR_DECLs, only static, public and external symbols need an
4945 if (TREE_CODE (decl
) == VAR_DECL
4946 && !TREE_STATIC (decl
)
4947 && !TREE_PUBLIC (decl
)
4948 && !DECL_EXTERNAL (decl
))
4951 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4953 /* Do not set assembler name on builtins. Allow RTL expansion to
4954 decide whether to expand inline or via a regular call. */
4955 if (DECL_BUILT_IN (decl
)
4956 && DECL_BUILT_IN_CLASS (decl
) != BUILT_IN_FRONTEND
)
4959 /* Functions represented in the callgraph need an assembler name. */
4960 if (cgraph_get_node (decl
) != NULL
)
4963 /* Unused and not public functions don't need an assembler name. */
4964 if (!TREE_USED (decl
) && !TREE_PUBLIC (decl
))
4972 /* Reset all language specific information still present in symbol
4976 free_lang_data_in_decl (tree decl
)
4978 gcc_assert (DECL_P (decl
));
4980 /* Give the FE a chance to remove its own data first. */
4981 lang_hooks
.free_lang_data (decl
);
4983 TREE_LANG_FLAG_0 (decl
) = 0;
4984 TREE_LANG_FLAG_1 (decl
) = 0;
4985 TREE_LANG_FLAG_2 (decl
) = 0;
4986 TREE_LANG_FLAG_3 (decl
) = 0;
4987 TREE_LANG_FLAG_4 (decl
) = 0;
4988 TREE_LANG_FLAG_5 (decl
) = 0;
4989 TREE_LANG_FLAG_6 (decl
) = 0;
4991 free_lang_data_in_one_sizepos (&DECL_SIZE (decl
));
4992 free_lang_data_in_one_sizepos (&DECL_SIZE_UNIT (decl
));
4993 if (TREE_CODE (decl
) == FIELD_DECL
)
4995 free_lang_data_in_one_sizepos (&DECL_FIELD_OFFSET (decl
));
4996 if (TREE_CODE (DECL_CONTEXT (decl
)) == QUAL_UNION_TYPE
)
4997 DECL_QUALIFIER (decl
) = NULL_TREE
;
5000 if (TREE_CODE (decl
) == FUNCTION_DECL
)
5002 struct cgraph_node
*node
;
5003 if (!(node
= cgraph_get_node (decl
))
5004 || (!node
->definition
&& !node
->clones
))
5007 cgraph_release_function_body (node
);
5010 release_function_body (decl
);
5011 DECL_ARGUMENTS (decl
) = NULL
;
5012 DECL_RESULT (decl
) = NULL
;
5013 DECL_INITIAL (decl
) = error_mark_node
;
5016 if (gimple_has_body_p (decl
))
5020 /* If DECL has a gimple body, then the context for its
5021 arguments must be DECL. Otherwise, it doesn't really
5022 matter, as we will not be emitting any code for DECL. In
5023 general, there may be other instances of DECL created by
5024 the front end and since PARM_DECLs are generally shared,
5025 their DECL_CONTEXT changes as the replicas of DECL are
5026 created. The only time where DECL_CONTEXT is important
5027 is for the FUNCTION_DECLs that have a gimple body (since
5028 the PARM_DECL will be used in the function's body). */
5029 for (t
= DECL_ARGUMENTS (decl
); t
; t
= TREE_CHAIN (t
))
5030 DECL_CONTEXT (t
) = decl
;
5033 /* DECL_SAVED_TREE holds the GENERIC representation for DECL.
5034 At this point, it is not needed anymore. */
5035 DECL_SAVED_TREE (decl
) = NULL_TREE
;
5037 /* Clear the abstract origin if it refers to a method. Otherwise
5038 dwarf2out.c will ICE as we clear TYPE_METHODS and thus the
5039 origin will not be output correctly. */
5040 if (DECL_ABSTRACT_ORIGIN (decl
)
5041 && DECL_CONTEXT (DECL_ABSTRACT_ORIGIN (decl
))
5042 && RECORD_OR_UNION_TYPE_P
5043 (DECL_CONTEXT (DECL_ABSTRACT_ORIGIN (decl
))))
5044 DECL_ABSTRACT_ORIGIN (decl
) = NULL_TREE
;
5046 /* Sometimes the C++ frontend doesn't manage to transform a temporary
5047 DECL_VINDEX referring to itself into a vtable slot number as it
5048 should. Happens with functions that are copied and then forgotten
5049 about. Just clear it, it won't matter anymore. */
5050 if (DECL_VINDEX (decl
) && !tree_fits_shwi_p (DECL_VINDEX (decl
)))
5051 DECL_VINDEX (decl
) = NULL_TREE
;
5053 else if (TREE_CODE (decl
) == VAR_DECL
)
5055 if ((DECL_EXTERNAL (decl
)
5056 && (!TREE_STATIC (decl
) || !TREE_READONLY (decl
)))
5057 || (decl_function_context (decl
) && !TREE_STATIC (decl
)))
5058 DECL_INITIAL (decl
) = NULL_TREE
;
5060 else if (TREE_CODE (decl
) == TYPE_DECL
5061 || TREE_CODE (decl
) == FIELD_DECL
)
5062 DECL_INITIAL (decl
) = NULL_TREE
;
5063 else if (TREE_CODE (decl
) == TRANSLATION_UNIT_DECL
5064 && DECL_INITIAL (decl
)
5065 && TREE_CODE (DECL_INITIAL (decl
)) == BLOCK
)
5067 /* Strip builtins from the translation-unit BLOCK. We still have targets
5068 without builtin_decl_explicit support and also builtins are shared
5069 nodes and thus we can't use TREE_CHAIN in multiple lists. */
5070 tree
*nextp
= &BLOCK_VARS (DECL_INITIAL (decl
));
5074 if (TREE_CODE (var
) == FUNCTION_DECL
5075 && DECL_BUILT_IN (var
))
5076 *nextp
= TREE_CHAIN (var
);
5078 nextp
= &TREE_CHAIN (var
);
5084 /* Data used when collecting DECLs and TYPEs for language data removal. */
5086 struct free_lang_data_d
5088 /* Worklist to avoid excessive recursion. */
5091 /* Set of traversed objects. Used to avoid duplicate visits. */
5092 struct pointer_set_t
*pset
;
5094 /* Array of symbols to process with free_lang_data_in_decl. */
5097 /* Array of types to process with free_lang_data_in_type. */
5102 /* Save all language fields needed to generate proper debug information
5103 for DECL. This saves most fields cleared out by free_lang_data_in_decl. */
5106 save_debug_info_for_decl (tree t
)
5108 /*struct saved_debug_info_d *sdi;*/
5110 gcc_assert (debug_info_level
> DINFO_LEVEL_TERSE
&& t
&& DECL_P (t
));
5112 /* FIXME. Partial implementation for saving debug info removed. */
5116 /* Save all language fields needed to generate proper debug information
5117 for TYPE. This saves most fields cleared out by free_lang_data_in_type. */
5120 save_debug_info_for_type (tree t
)
5122 /*struct saved_debug_info_d *sdi;*/
5124 gcc_assert (debug_info_level
> DINFO_LEVEL_TERSE
&& t
&& TYPE_P (t
));
5126 /* FIXME. Partial implementation for saving debug info removed. */
5130 /* Add type or decl T to one of the list of tree nodes that need their
5131 language data removed. The lists are held inside FLD. */
5134 add_tree_to_fld_list (tree t
, struct free_lang_data_d
*fld
)
5138 fld
->decls
.safe_push (t
);
5139 if (debug_info_level
> DINFO_LEVEL_TERSE
)
5140 save_debug_info_for_decl (t
);
5142 else if (TYPE_P (t
))
5144 fld
->types
.safe_push (t
);
5145 if (debug_info_level
> DINFO_LEVEL_TERSE
)
5146 save_debug_info_for_type (t
);
5152 /* Push tree node T into FLD->WORKLIST. */
5155 fld_worklist_push (tree t
, struct free_lang_data_d
*fld
)
5157 if (t
&& !is_lang_specific (t
) && !pointer_set_contains (fld
->pset
, t
))
5158 fld
->worklist
.safe_push ((t
));
5162 /* Operand callback helper for free_lang_data_in_node. *TP is the
5163 subtree operand being considered. */
5166 find_decls_types_r (tree
*tp
, int *ws
, void *data
)
5169 struct free_lang_data_d
*fld
= (struct free_lang_data_d
*) data
;
5171 if (TREE_CODE (t
) == TREE_LIST
)
5174 /* Language specific nodes will be removed, so there is no need
5175 to gather anything under them. */
5176 if (is_lang_specific (t
))
5184 /* Note that walk_tree does not traverse every possible field in
5185 decls, so we have to do our own traversals here. */
5186 add_tree_to_fld_list (t
, fld
);
5188 fld_worklist_push (DECL_NAME (t
), fld
);
5189 fld_worklist_push (DECL_CONTEXT (t
), fld
);
5190 fld_worklist_push (DECL_SIZE (t
), fld
);
5191 fld_worklist_push (DECL_SIZE_UNIT (t
), fld
);
5193 /* We are going to remove everything under DECL_INITIAL for
5194 TYPE_DECLs. No point walking them. */
5195 if (TREE_CODE (t
) != TYPE_DECL
)
5196 fld_worklist_push (DECL_INITIAL (t
), fld
);
5198 fld_worklist_push (DECL_ATTRIBUTES (t
), fld
);
5199 fld_worklist_push (DECL_ABSTRACT_ORIGIN (t
), fld
);
5201 if (TREE_CODE (t
) == FUNCTION_DECL
)
5203 fld_worklist_push (DECL_ARGUMENTS (t
), fld
);
5204 fld_worklist_push (DECL_RESULT (t
), fld
);
5206 else if (TREE_CODE (t
) == TYPE_DECL
)
5208 fld_worklist_push (DECL_ARGUMENT_FLD (t
), fld
);
5209 fld_worklist_push (DECL_VINDEX (t
), fld
);
5210 fld_worklist_push (DECL_ORIGINAL_TYPE (t
), fld
);
5212 else if (TREE_CODE (t
) == FIELD_DECL
)
5214 fld_worklist_push (DECL_FIELD_OFFSET (t
), fld
);
5215 fld_worklist_push (DECL_BIT_FIELD_TYPE (t
), fld
);
5216 fld_worklist_push (DECL_FIELD_BIT_OFFSET (t
), fld
);
5217 fld_worklist_push (DECL_FCONTEXT (t
), fld
);
5219 else if (TREE_CODE (t
) == VAR_DECL
)
5221 fld_worklist_push (DECL_SECTION_NAME (t
), fld
);
5222 fld_worklist_push (DECL_COMDAT_GROUP (t
), fld
);
5225 if ((TREE_CODE (t
) == VAR_DECL
|| TREE_CODE (t
) == PARM_DECL
)
5226 && DECL_HAS_VALUE_EXPR_P (t
))
5227 fld_worklist_push (DECL_VALUE_EXPR (t
), fld
);
5229 if (TREE_CODE (t
) != FIELD_DECL
5230 && TREE_CODE (t
) != TYPE_DECL
)
5231 fld_worklist_push (TREE_CHAIN (t
), fld
);
5234 else if (TYPE_P (t
))
5236 /* Note that walk_tree does not traverse every possible field in
5237 types, so we have to do our own traversals here. */
5238 add_tree_to_fld_list (t
, fld
);
5240 if (!RECORD_OR_UNION_TYPE_P (t
))
5241 fld_worklist_push (TYPE_CACHED_VALUES (t
), fld
);
5242 fld_worklist_push (TYPE_SIZE (t
), fld
);
5243 fld_worklist_push (TYPE_SIZE_UNIT (t
), fld
);
5244 fld_worklist_push (TYPE_ATTRIBUTES (t
), fld
);
5245 fld_worklist_push (TYPE_POINTER_TO (t
), fld
);
5246 fld_worklist_push (TYPE_REFERENCE_TO (t
), fld
);
5247 fld_worklist_push (TYPE_NAME (t
), fld
);
5248 /* Do not walk TYPE_NEXT_PTR_TO or TYPE_NEXT_REF_TO. We do not stream
5249 them and thus do not and want not to reach unused pointer types
5251 if (!POINTER_TYPE_P (t
))
5252 fld_worklist_push (TYPE_MINVAL (t
), fld
);
5253 if (!RECORD_OR_UNION_TYPE_P (t
))
5254 fld_worklist_push (TYPE_MAXVAL (t
), fld
);
5255 fld_worklist_push (TYPE_MAIN_VARIANT (t
), fld
);
5256 /* Do not walk TYPE_NEXT_VARIANT. We do not stream it and thus
5257 do not and want not to reach unused variants this way. */
5258 if (TYPE_CONTEXT (t
))
5260 tree ctx
= TYPE_CONTEXT (t
);
5261 /* We adjust BLOCK TYPE_CONTEXTs to the innermost non-BLOCK one.
5262 So push that instead. */
5263 while (ctx
&& TREE_CODE (ctx
) == BLOCK
)
5264 ctx
= BLOCK_SUPERCONTEXT (ctx
);
5265 fld_worklist_push (ctx
, fld
);
5267 /* Do not walk TYPE_CANONICAL. We do not stream it and thus do not
5268 and want not to reach unused types this way. */
5270 if (RECORD_OR_UNION_TYPE_P (t
) && TYPE_BINFO (t
))
5274 FOR_EACH_VEC_ELT (*BINFO_BASE_BINFOS (TYPE_BINFO (t
)), i
, tem
)
5275 fld_worklist_push (TREE_TYPE (tem
), fld
);
5276 tem
= BINFO_VIRTUALS (TYPE_BINFO (t
));
5278 /* The Java FE overloads BINFO_VIRTUALS for its own purpose. */
5279 && TREE_CODE (tem
) == TREE_LIST
)
5282 fld_worklist_push (TREE_VALUE (tem
), fld
);
5283 tem
= TREE_CHAIN (tem
);
5287 if (RECORD_OR_UNION_TYPE_P (t
))
5290 /* Push all TYPE_FIELDS - there can be interleaving interesting
5291 and non-interesting things. */
5292 tem
= TYPE_FIELDS (t
);
5295 if (TREE_CODE (tem
) == FIELD_DECL
5296 || TREE_CODE (tem
) == TYPE_DECL
)
5297 fld_worklist_push (tem
, fld
);
5298 tem
= TREE_CHAIN (tem
);
5302 fld_worklist_push (TYPE_STUB_DECL (t
), fld
);
5305 else if (TREE_CODE (t
) == BLOCK
)
5308 for (tem
= BLOCK_VARS (t
); tem
; tem
= TREE_CHAIN (tem
))
5309 fld_worklist_push (tem
, fld
);
5310 for (tem
= BLOCK_SUBBLOCKS (t
); tem
; tem
= BLOCK_CHAIN (tem
))
5311 fld_worklist_push (tem
, fld
);
5312 fld_worklist_push (BLOCK_ABSTRACT_ORIGIN (t
), fld
);
5315 if (TREE_CODE (t
) != IDENTIFIER_NODE
5316 && CODE_CONTAINS_STRUCT (TREE_CODE (t
), TS_TYPED
))
5317 fld_worklist_push (TREE_TYPE (t
), fld
);
5323 /* Find decls and types in T. */
5326 find_decls_types (tree t
, struct free_lang_data_d
*fld
)
5330 if (!pointer_set_contains (fld
->pset
, t
))
5331 walk_tree (&t
, find_decls_types_r
, fld
, fld
->pset
);
5332 if (fld
->worklist
.is_empty ())
5334 t
= fld
->worklist
.pop ();
5338 /* Translate all the types in LIST with the corresponding runtime
5342 get_eh_types_for_runtime (tree list
)
5346 if (list
== NULL_TREE
)
5349 head
= build_tree_list (0, lookup_type_for_runtime (TREE_VALUE (list
)));
5351 list
= TREE_CHAIN (list
);
5354 tree n
= build_tree_list (0, lookup_type_for_runtime (TREE_VALUE (list
)));
5355 TREE_CHAIN (prev
) = n
;
5356 prev
= TREE_CHAIN (prev
);
5357 list
= TREE_CHAIN (list
);
5364 /* Find decls and types referenced in EH region R and store them in
5365 FLD->DECLS and FLD->TYPES. */
5368 find_decls_types_in_eh_region (eh_region r
, struct free_lang_data_d
*fld
)
5379 /* The types referenced in each catch must first be changed to the
5380 EH types used at runtime. This removes references to FE types
5382 for (c
= r
->u
.eh_try
.first_catch
; c
; c
= c
->next_catch
)
5384 c
->type_list
= get_eh_types_for_runtime (c
->type_list
);
5385 walk_tree (&c
->type_list
, find_decls_types_r
, fld
, fld
->pset
);
5390 case ERT_ALLOWED_EXCEPTIONS
:
5391 r
->u
.allowed
.type_list
5392 = get_eh_types_for_runtime (r
->u
.allowed
.type_list
);
5393 walk_tree (&r
->u
.allowed
.type_list
, find_decls_types_r
, fld
, fld
->pset
);
5396 case ERT_MUST_NOT_THROW
:
5397 walk_tree (&r
->u
.must_not_throw
.failure_decl
,
5398 find_decls_types_r
, fld
, fld
->pset
);
5404 /* Find decls and types referenced in cgraph node N and store them in
5405 FLD->DECLS and FLD->TYPES. Unlike pass_referenced_vars, this will
5406 look for *every* kind of DECL and TYPE node reachable from N,
5407 including those embedded inside types and decls (i.e,, TYPE_DECLs,
5408 NAMESPACE_DECLs, etc). */
5411 find_decls_types_in_node (struct cgraph_node
*n
, struct free_lang_data_d
*fld
)
5414 struct function
*fn
;
5418 find_decls_types (n
->decl
, fld
);
5420 if (!gimple_has_body_p (n
->decl
))
5423 gcc_assert (current_function_decl
== NULL_TREE
&& cfun
== NULL
);
5425 fn
= DECL_STRUCT_FUNCTION (n
->decl
);
5427 /* Traverse locals. */
5428 FOR_EACH_LOCAL_DECL (fn
, ix
, t
)
5429 find_decls_types (t
, fld
);
5431 /* Traverse EH regions in FN. */
5434 FOR_ALL_EH_REGION_FN (r
, fn
)
5435 find_decls_types_in_eh_region (r
, fld
);
5438 /* Traverse every statement in FN. */
5439 FOR_EACH_BB_FN (bb
, fn
)
5441 gimple_stmt_iterator si
;
5444 for (si
= gsi_start_phis (bb
); !gsi_end_p (si
); gsi_next (&si
))
5446 gimple phi
= gsi_stmt (si
);
5448 for (i
= 0; i
< gimple_phi_num_args (phi
); i
++)
5450 tree
*arg_p
= gimple_phi_arg_def_ptr (phi
, i
);
5451 find_decls_types (*arg_p
, fld
);
5455 for (si
= gsi_start_bb (bb
); !gsi_end_p (si
); gsi_next (&si
))
5457 gimple stmt
= gsi_stmt (si
);
5459 if (is_gimple_call (stmt
))
5460 find_decls_types (gimple_call_fntype (stmt
), fld
);
5462 for (i
= 0; i
< gimple_num_ops (stmt
); i
++)
5464 tree arg
= gimple_op (stmt
, i
);
5465 find_decls_types (arg
, fld
);
5472 /* Find decls and types referenced in varpool node N and store them in
5473 FLD->DECLS and FLD->TYPES. Unlike pass_referenced_vars, this will
5474 look for *every* kind of DECL and TYPE node reachable from N,
5475 including those embedded inside types and decls (i.e,, TYPE_DECLs,
5476 NAMESPACE_DECLs, etc). */
5479 find_decls_types_in_var (varpool_node
*v
, struct free_lang_data_d
*fld
)
5481 find_decls_types (v
->decl
, fld
);
5484 /* If T needs an assembler name, have one created for it. */
5487 assign_assembler_name_if_neeeded (tree t
)
5489 if (need_assembler_name_p (t
))
5491 /* When setting DECL_ASSEMBLER_NAME, the C++ mangler may emit
5492 diagnostics that use input_location to show locus
5493 information. The problem here is that, at this point,
5494 input_location is generally anchored to the end of the file
5495 (since the parser is long gone), so we don't have a good
5496 position to pin it to.
5498 To alleviate this problem, this uses the location of T's
5499 declaration. Examples of this are
5500 testsuite/g++.dg/template/cond2.C and
5501 testsuite/g++.dg/template/pr35240.C. */
5502 location_t saved_location
= input_location
;
5503 input_location
= DECL_SOURCE_LOCATION (t
);
5505 decl_assembler_name (t
);
5507 input_location
= saved_location
;
5512 /* Free language specific information for every operand and expression
5513 in every node of the call graph. This process operates in three stages:
5515 1- Every callgraph node and varpool node is traversed looking for
5516 decls and types embedded in them. This is a more exhaustive
5517 search than that done by find_referenced_vars, because it will
5518 also collect individual fields, decls embedded in types, etc.
5520 2- All the decls found are sent to free_lang_data_in_decl.
5522 3- All the types found are sent to free_lang_data_in_type.
5524 The ordering between decls and types is important because
5525 free_lang_data_in_decl sets assembler names, which includes
5526 mangling. So types cannot be freed up until assembler names have
5530 free_lang_data_in_cgraph (void)
5532 struct cgraph_node
*n
;
5534 struct free_lang_data_d fld
;
5539 /* Initialize sets and arrays to store referenced decls and types. */
5540 fld
.pset
= pointer_set_create ();
5541 fld
.worklist
.create (0);
5542 fld
.decls
.create (100);
5543 fld
.types
.create (100);
5545 /* Find decls and types in the body of every function in the callgraph. */
5546 FOR_EACH_FUNCTION (n
)
5547 find_decls_types_in_node (n
, &fld
);
5549 FOR_EACH_VEC_SAFE_ELT (alias_pairs
, i
, p
)
5550 find_decls_types (p
->decl
, &fld
);
5552 /* Find decls and types in every varpool symbol. */
5553 FOR_EACH_VARIABLE (v
)
5554 find_decls_types_in_var (v
, &fld
);
5556 /* Set the assembler name on every decl found. We need to do this
5557 now because free_lang_data_in_decl will invalidate data needed
5558 for mangling. This breaks mangling on interdependent decls. */
5559 FOR_EACH_VEC_ELT (fld
.decls
, i
, t
)
5560 assign_assembler_name_if_neeeded (t
);
5562 /* Traverse every decl found freeing its language data. */
5563 FOR_EACH_VEC_ELT (fld
.decls
, i
, t
)
5564 free_lang_data_in_decl (t
);
5566 /* Traverse every type found freeing its language data. */
5567 FOR_EACH_VEC_ELT (fld
.types
, i
, t
)
5568 free_lang_data_in_type (t
);
5570 pointer_set_destroy (fld
.pset
);
5571 fld
.worklist
.release ();
5572 fld
.decls
.release ();
5573 fld
.types
.release ();
5577 /* Free resources that are used by FE but are not needed once they are done. */
5580 free_lang_data (void)
5584 /* If we are the LTO frontend we have freed lang-specific data already. */
5586 || !flag_generate_lto
)
5589 /* Allocate and assign alias sets to the standard integer types
5590 while the slots are still in the way the frontends generated them. */
5591 for (i
= 0; i
< itk_none
; ++i
)
5592 if (integer_types
[i
])
5593 TYPE_ALIAS_SET (integer_types
[i
]) = get_alias_set (integer_types
[i
]);
5595 /* Traverse the IL resetting language specific information for
5596 operands, expressions, etc. */
5597 free_lang_data_in_cgraph ();
5599 /* Create gimple variants for common types. */
5600 ptrdiff_type_node
= integer_type_node
;
5601 fileptr_type_node
= ptr_type_node
;
5603 /* Reset some langhooks. Do not reset types_compatible_p, it may
5604 still be used indirectly via the get_alias_set langhook. */
5605 lang_hooks
.dwarf_name
= lhd_dwarf_name
;
5606 lang_hooks
.decl_printable_name
= gimple_decl_printable_name
;
5607 /* We do not want the default decl_assembler_name implementation,
5608 rather if we have fixed everything we want a wrapper around it
5609 asserting that all non-local symbols already got their assembler
5610 name and only produce assembler names for local symbols. Or rather
5611 make sure we never call decl_assembler_name on local symbols and
5612 devise a separate, middle-end private scheme for it. */
5614 /* Reset diagnostic machinery. */
5615 tree_diagnostics_defaults (global_dc
);
5623 const pass_data pass_data_ipa_free_lang_data
=
5625 SIMPLE_IPA_PASS
, /* type */
5626 "*free_lang_data", /* name */
5627 OPTGROUP_NONE
, /* optinfo_flags */
5628 false, /* has_gate */
5629 true, /* has_execute */
5630 TV_IPA_FREE_LANG_DATA
, /* tv_id */
5631 0, /* properties_required */
5632 0, /* properties_provided */
5633 0, /* properties_destroyed */
5634 0, /* todo_flags_start */
5635 0, /* todo_flags_finish */
5638 class pass_ipa_free_lang_data
: public simple_ipa_opt_pass
5641 pass_ipa_free_lang_data (gcc::context
*ctxt
)
5642 : simple_ipa_opt_pass (pass_data_ipa_free_lang_data
, ctxt
)
5645 /* opt_pass methods: */
5646 unsigned int execute () { return free_lang_data (); }
5648 }; // class pass_ipa_free_lang_data
5652 simple_ipa_opt_pass
*
5653 make_pass_ipa_free_lang_data (gcc::context
*ctxt
)
5655 return new pass_ipa_free_lang_data (ctxt
);
5658 /* The backbone of is_attribute_p(). ATTR_LEN is the string length of
5659 ATTR_NAME. Also used internally by remove_attribute(). */
5661 private_is_attribute_p (const char *attr_name
, size_t attr_len
, const_tree ident
)
5663 size_t ident_len
= IDENTIFIER_LENGTH (ident
);
5665 if (ident_len
== attr_len
)
5667 if (strcmp (attr_name
, IDENTIFIER_POINTER (ident
)) == 0)
5670 else if (ident_len
== attr_len
+ 4)
5672 /* There is the possibility that ATTR is 'text' and IDENT is
5674 const char *p
= IDENTIFIER_POINTER (ident
);
5675 if (p
[0] == '_' && p
[1] == '_'
5676 && p
[ident_len
- 2] == '_' && p
[ident_len
- 1] == '_'
5677 && strncmp (attr_name
, p
+ 2, attr_len
) == 0)
5684 /* The backbone of lookup_attribute(). ATTR_LEN is the string length
5685 of ATTR_NAME, and LIST is not NULL_TREE. */
5687 private_lookup_attribute (const char *attr_name
, size_t attr_len
, tree list
)
5691 size_t ident_len
= IDENTIFIER_LENGTH (get_attribute_name (list
));
5693 if (ident_len
== attr_len
)
5695 if (!strcmp (attr_name
,
5696 IDENTIFIER_POINTER (get_attribute_name (list
))))
5699 /* TODO: If we made sure that attributes were stored in the
5700 canonical form without '__...__' (ie, as in 'text' as opposed
5701 to '__text__') then we could avoid the following case. */
5702 else if (ident_len
== attr_len
+ 4)
5704 const char *p
= IDENTIFIER_POINTER (get_attribute_name (list
));
5705 if (p
[0] == '_' && p
[1] == '_'
5706 && p
[ident_len
- 2] == '_' && p
[ident_len
- 1] == '_'
5707 && strncmp (attr_name
, p
+ 2, attr_len
) == 0)
5710 list
= TREE_CHAIN (list
);
5716 /* A variant of lookup_attribute() that can be used with an identifier
5717 as the first argument, and where the identifier can be either
5718 'text' or '__text__'.
5720 Given an attribute ATTR_IDENTIFIER, and a list of attributes LIST,
5721 return a pointer to the attribute's list element if the attribute
5722 is part of the list, or NULL_TREE if not found. If the attribute
5723 appears more than once, this only returns the first occurrence; the
5724 TREE_CHAIN of the return value should be passed back in if further
5725 occurrences are wanted. ATTR_IDENTIFIER must be an identifier but
5726 can be in the form 'text' or '__text__'. */
5728 lookup_ident_attribute (tree attr_identifier
, tree list
)
5730 gcc_checking_assert (TREE_CODE (attr_identifier
) == IDENTIFIER_NODE
);
5734 gcc_checking_assert (TREE_CODE (get_attribute_name (list
))
5735 == IDENTIFIER_NODE
);
5737 /* Identifiers can be compared directly for equality. */
5738 if (attr_identifier
== get_attribute_name (list
))
5741 /* If they are not equal, they may still be one in the form
5742 'text' while the other one is in the form '__text__'. TODO:
5743 If we were storing attributes in normalized 'text' form, then
5744 this could all go away and we could take full advantage of
5745 the fact that we're comparing identifiers. :-) */
5747 size_t attr_len
= IDENTIFIER_LENGTH (attr_identifier
);
5748 size_t ident_len
= IDENTIFIER_LENGTH (get_attribute_name (list
));
5750 if (ident_len
== attr_len
+ 4)
5752 const char *p
= IDENTIFIER_POINTER (get_attribute_name (list
));
5753 const char *q
= IDENTIFIER_POINTER (attr_identifier
);
5754 if (p
[0] == '_' && p
[1] == '_'
5755 && p
[ident_len
- 2] == '_' && p
[ident_len
- 1] == '_'
5756 && strncmp (q
, p
+ 2, attr_len
) == 0)
5759 else if (ident_len
+ 4 == attr_len
)
5761 const char *p
= IDENTIFIER_POINTER (get_attribute_name (list
));
5762 const char *q
= IDENTIFIER_POINTER (attr_identifier
);
5763 if (q
[0] == '_' && q
[1] == '_'
5764 && q
[attr_len
- 2] == '_' && q
[attr_len
- 1] == '_'
5765 && strncmp (q
+ 2, p
, ident_len
) == 0)
5769 list
= TREE_CHAIN (list
);
5775 /* Remove any instances of attribute ATTR_NAME in LIST and return the
5779 remove_attribute (const char *attr_name
, tree list
)
5782 size_t attr_len
= strlen (attr_name
);
5784 gcc_checking_assert (attr_name
[0] != '_');
5786 for (p
= &list
; *p
; )
5789 /* TODO: If we were storing attributes in normalized form, here
5790 we could use a simple strcmp(). */
5791 if (private_is_attribute_p (attr_name
, attr_len
, get_attribute_name (l
)))
5792 *p
= TREE_CHAIN (l
);
5794 p
= &TREE_CHAIN (l
);
5800 /* Return an attribute list that is the union of a1 and a2. */
5803 merge_attributes (tree a1
, tree a2
)
5807 /* Either one unset? Take the set one. */
5809 if ((attributes
= a1
) == 0)
5812 /* One that completely contains the other? Take it. */
5814 else if (a2
!= 0 && ! attribute_list_contained (a1
, a2
))
5816 if (attribute_list_contained (a2
, a1
))
5820 /* Pick the longest list, and hang on the other list. */
5822 if (list_length (a1
) < list_length (a2
))
5823 attributes
= a2
, a2
= a1
;
5825 for (; a2
!= 0; a2
= TREE_CHAIN (a2
))
5828 for (a
= lookup_ident_attribute (get_attribute_name (a2
),
5830 a
!= NULL_TREE
&& !attribute_value_equal (a
, a2
);
5831 a
= lookup_ident_attribute (get_attribute_name (a2
),
5836 a1
= copy_node (a2
);
5837 TREE_CHAIN (a1
) = attributes
;
5846 /* Given types T1 and T2, merge their attributes and return
5850 merge_type_attributes (tree t1
, tree t2
)
5852 return merge_attributes (TYPE_ATTRIBUTES (t1
),
5853 TYPE_ATTRIBUTES (t2
));
5856 /* Given decls OLDDECL and NEWDECL, merge their attributes and return
5860 merge_decl_attributes (tree olddecl
, tree newdecl
)
5862 return merge_attributes (DECL_ATTRIBUTES (olddecl
),
5863 DECL_ATTRIBUTES (newdecl
));
5866 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
5868 /* Specialization of merge_decl_attributes for various Windows targets.
5870 This handles the following situation:
5872 __declspec (dllimport) int foo;
5875 The second instance of `foo' nullifies the dllimport. */
5878 merge_dllimport_decl_attributes (tree old
, tree new_tree
)
5881 int delete_dllimport_p
= 1;
5883 /* What we need to do here is remove from `old' dllimport if it doesn't
5884 appear in `new'. dllimport behaves like extern: if a declaration is
5885 marked dllimport and a definition appears later, then the object
5886 is not dllimport'd. We also remove a `new' dllimport if the old list
5887 contains dllexport: dllexport always overrides dllimport, regardless
5888 of the order of declaration. */
5889 if (!VAR_OR_FUNCTION_DECL_P (new_tree
))
5890 delete_dllimport_p
= 0;
5891 else if (DECL_DLLIMPORT_P (new_tree
)
5892 && lookup_attribute ("dllexport", DECL_ATTRIBUTES (old
)))
5894 DECL_DLLIMPORT_P (new_tree
) = 0;
5895 warning (OPT_Wattributes
, "%q+D already declared with dllexport attribute: "
5896 "dllimport ignored", new_tree
);
5898 else if (DECL_DLLIMPORT_P (old
) && !DECL_DLLIMPORT_P (new_tree
))
5900 /* Warn about overriding a symbol that has already been used, e.g.:
5901 extern int __attribute__ ((dllimport)) foo;
5902 int* bar () {return &foo;}
5905 if (TREE_USED (old
))
5907 warning (0, "%q+D redeclared without dllimport attribute "
5908 "after being referenced with dll linkage", new_tree
);
5909 /* If we have used a variable's address with dllimport linkage,
5910 keep the old DECL_DLLIMPORT_P flag: the ADDR_EXPR using the
5911 decl may already have had TREE_CONSTANT computed.
5912 We still remove the attribute so that assembler code refers
5913 to '&foo rather than '_imp__foo'. */
5914 if (TREE_CODE (old
) == VAR_DECL
&& TREE_ADDRESSABLE (old
))
5915 DECL_DLLIMPORT_P (new_tree
) = 1;
5918 /* Let an inline definition silently override the external reference,
5919 but otherwise warn about attribute inconsistency. */
5920 else if (TREE_CODE (new_tree
) == VAR_DECL
5921 || !DECL_DECLARED_INLINE_P (new_tree
))
5922 warning (OPT_Wattributes
, "%q+D redeclared without dllimport attribute: "
5923 "previous dllimport ignored", new_tree
);
5926 delete_dllimport_p
= 0;
5928 a
= merge_attributes (DECL_ATTRIBUTES (old
), DECL_ATTRIBUTES (new_tree
));
5930 if (delete_dllimport_p
)
5931 a
= remove_attribute ("dllimport", a
);
5936 /* Handle a "dllimport" or "dllexport" attribute; arguments as in
5937 struct attribute_spec.handler. */
5940 handle_dll_attribute (tree
* pnode
, tree name
, tree args
, int flags
,
5946 /* These attributes may apply to structure and union types being created,
5947 but otherwise should pass to the declaration involved. */
5950 if (flags
& ((int) ATTR_FLAG_DECL_NEXT
| (int) ATTR_FLAG_FUNCTION_NEXT
5951 | (int) ATTR_FLAG_ARRAY_NEXT
))
5953 *no_add_attrs
= true;
5954 return tree_cons (name
, args
, NULL_TREE
);
5956 if (TREE_CODE (node
) == RECORD_TYPE
5957 || TREE_CODE (node
) == UNION_TYPE
)
5959 node
= TYPE_NAME (node
);
5965 warning (OPT_Wattributes
, "%qE attribute ignored",
5967 *no_add_attrs
= true;
5972 if (TREE_CODE (node
) != FUNCTION_DECL
5973 && TREE_CODE (node
) != VAR_DECL
5974 && TREE_CODE (node
) != TYPE_DECL
)
5976 *no_add_attrs
= true;
5977 warning (OPT_Wattributes
, "%qE attribute ignored",
5982 if (TREE_CODE (node
) == TYPE_DECL
5983 && TREE_CODE (TREE_TYPE (node
)) != RECORD_TYPE
5984 && TREE_CODE (TREE_TYPE (node
)) != UNION_TYPE
)
5986 *no_add_attrs
= true;
5987 warning (OPT_Wattributes
, "%qE attribute ignored",
5992 is_dllimport
= is_attribute_p ("dllimport", name
);
5994 /* Report error on dllimport ambiguities seen now before they cause
5998 /* Honor any target-specific overrides. */
5999 if (!targetm
.valid_dllimport_attribute_p (node
))
6000 *no_add_attrs
= true;
6002 else if (TREE_CODE (node
) == FUNCTION_DECL
6003 && DECL_DECLARED_INLINE_P (node
))
6005 warning (OPT_Wattributes
, "inline function %q+D declared as "
6006 " dllimport: attribute ignored", node
);
6007 *no_add_attrs
= true;
6009 /* Like MS, treat definition of dllimported variables and
6010 non-inlined functions on declaration as syntax errors. */
6011 else if (TREE_CODE (node
) == FUNCTION_DECL
&& DECL_INITIAL (node
))
6013 error ("function %q+D definition is marked dllimport", node
);
6014 *no_add_attrs
= true;
6017 else if (TREE_CODE (node
) == VAR_DECL
)
6019 if (DECL_INITIAL (node
))
6021 error ("variable %q+D definition is marked dllimport",
6023 *no_add_attrs
= true;
6026 /* `extern' needn't be specified with dllimport.
6027 Specify `extern' now and hope for the best. Sigh. */
6028 DECL_EXTERNAL (node
) = 1;
6029 /* Also, implicitly give dllimport'd variables declared within
6030 a function global scope, unless declared static. */
6031 if (current_function_decl
!= NULL_TREE
&& !TREE_STATIC (node
))
6032 TREE_PUBLIC (node
) = 1;
6035 if (*no_add_attrs
== false)
6036 DECL_DLLIMPORT_P (node
) = 1;
6038 else if (TREE_CODE (node
) == FUNCTION_DECL
6039 && DECL_DECLARED_INLINE_P (node
)
6040 && flag_keep_inline_dllexport
)
6041 /* An exported function, even if inline, must be emitted. */
6042 DECL_EXTERNAL (node
) = 0;
6044 /* Report error if symbol is not accessible at global scope. */
6045 if (!TREE_PUBLIC (node
)
6046 && (TREE_CODE (node
) == VAR_DECL
6047 || TREE_CODE (node
) == FUNCTION_DECL
))
6049 error ("external linkage required for symbol %q+D because of "
6050 "%qE attribute", node
, name
);
6051 *no_add_attrs
= true;
6054 /* A dllexport'd entity must have default visibility so that other
6055 program units (shared libraries or the main executable) can see
6056 it. A dllimport'd entity must have default visibility so that
6057 the linker knows that undefined references within this program
6058 unit can be resolved by the dynamic linker. */
6061 if (DECL_VISIBILITY_SPECIFIED (node
)
6062 && DECL_VISIBILITY (node
) != VISIBILITY_DEFAULT
)
6063 error ("%qE implies default visibility, but %qD has already "
6064 "been declared with a different visibility",
6066 DECL_VISIBILITY (node
) = VISIBILITY_DEFAULT
;
6067 DECL_VISIBILITY_SPECIFIED (node
) = 1;
6073 #endif /* TARGET_DLLIMPORT_DECL_ATTRIBUTES */
6075 /* Set the type qualifiers for TYPE to TYPE_QUALS, which is a bitmask
6076 of the various TYPE_QUAL values. */
6079 set_type_quals (tree type
, int type_quals
)
6081 TYPE_READONLY (type
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
6082 TYPE_VOLATILE (type
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
6083 TYPE_RESTRICT (type
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
6084 TYPE_ATOMIC (type
) = (type_quals
& TYPE_QUAL_ATOMIC
) != 0;
6085 TYPE_ADDR_SPACE (type
) = DECODE_QUAL_ADDR_SPACE (type_quals
);
6088 /* Returns true iff CAND is equivalent to BASE with TYPE_QUALS. */
6091 check_qualified_type (const_tree cand
, const_tree base
, int type_quals
)
6093 return (TYPE_QUALS (cand
) == type_quals
6094 && TYPE_NAME (cand
) == TYPE_NAME (base
)
6095 /* Apparently this is needed for Objective-C. */
6096 && TYPE_CONTEXT (cand
) == TYPE_CONTEXT (base
)
6097 /* Check alignment. */
6098 && TYPE_ALIGN (cand
) == TYPE_ALIGN (base
)
6099 && attribute_list_equal (TYPE_ATTRIBUTES (cand
),
6100 TYPE_ATTRIBUTES (base
)));
6103 /* Returns true iff CAND is equivalent to BASE with ALIGN. */
6106 check_aligned_type (const_tree cand
, const_tree base
, unsigned int align
)
6108 return (TYPE_QUALS (cand
) == TYPE_QUALS (base
)
6109 && TYPE_NAME (cand
) == TYPE_NAME (base
)
6110 /* Apparently this is needed for Objective-C. */
6111 && TYPE_CONTEXT (cand
) == TYPE_CONTEXT (base
)
6112 /* Check alignment. */
6113 && TYPE_ALIGN (cand
) == align
6114 && attribute_list_equal (TYPE_ATTRIBUTES (cand
),
6115 TYPE_ATTRIBUTES (base
)));
6118 /* This function checks to see if TYPE matches the size one of the built-in
6119 atomic types, and returns that core atomic type. */
6122 find_atomic_core_type (tree type
)
6124 tree base_atomic_type
;
6126 /* Only handle complete types. */
6127 if (TYPE_SIZE (type
) == NULL_TREE
)
6130 HOST_WIDE_INT type_size
= tree_to_uhwi (TYPE_SIZE (type
));
6134 base_atomic_type
= atomicQI_type_node
;
6138 base_atomic_type
= atomicHI_type_node
;
6142 base_atomic_type
= atomicSI_type_node
;
6146 base_atomic_type
= atomicDI_type_node
;
6150 base_atomic_type
= atomicTI_type_node
;
6154 base_atomic_type
= NULL_TREE
;
6157 return base_atomic_type
;
6160 /* Return a version of the TYPE, qualified as indicated by the
6161 TYPE_QUALS, if one exists. If no qualified version exists yet,
6162 return NULL_TREE. */
6165 get_qualified_type (tree type
, int type_quals
)
6169 if (TYPE_QUALS (type
) == type_quals
)
6172 /* Search the chain of variants to see if there is already one there just
6173 like the one we need to have. If so, use that existing one. We must
6174 preserve the TYPE_NAME, since there is code that depends on this. */
6175 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
6176 if (check_qualified_type (t
, type
, type_quals
))
6182 /* Like get_qualified_type, but creates the type if it does not
6183 exist. This function never returns NULL_TREE. */
6186 build_qualified_type (tree type
, int type_quals
)
6190 /* See if we already have the appropriate qualified variant. */
6191 t
= get_qualified_type (type
, type_quals
);
6193 /* If not, build it. */
6196 t
= build_variant_type_copy (type
);
6197 set_type_quals (t
, type_quals
);
6199 if (((type_quals
& TYPE_QUAL_ATOMIC
) == TYPE_QUAL_ATOMIC
))
6201 /* See if this object can map to a basic atomic type. */
6202 tree atomic_type
= find_atomic_core_type (type
);
6205 /* Ensure the alignment of this type is compatible with
6206 the required alignment of the atomic type. */
6207 if (TYPE_ALIGN (atomic_type
) > TYPE_ALIGN (t
))
6208 TYPE_ALIGN (t
) = TYPE_ALIGN (atomic_type
);
6212 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
6213 /* Propagate structural equality. */
6214 SET_TYPE_STRUCTURAL_EQUALITY (t
);
6215 else if (TYPE_CANONICAL (type
) != type
)
6216 /* Build the underlying canonical type, since it is different
6219 tree c
= build_qualified_type (TYPE_CANONICAL (type
),
6221 TYPE_CANONICAL (t
) = TYPE_CANONICAL (c
);
6224 /* T is its own canonical type. */
6225 TYPE_CANONICAL (t
) = t
;
6232 /* Create a variant of type T with alignment ALIGN. */
6235 build_aligned_type (tree type
, unsigned int align
)
6239 if (TYPE_PACKED (type
)
6240 || TYPE_ALIGN (type
) == align
)
6243 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
6244 if (check_aligned_type (t
, type
, align
))
6247 t
= build_variant_type_copy (type
);
6248 TYPE_ALIGN (t
) = align
;
6253 /* Create a new distinct copy of TYPE. The new type is made its own
6254 MAIN_VARIANT. If TYPE requires structural equality checks, the
6255 resulting type requires structural equality checks; otherwise, its
6256 TYPE_CANONICAL points to itself. */
6259 build_distinct_type_copy (tree type
)
6261 tree t
= copy_node (type
);
6263 TYPE_POINTER_TO (t
) = 0;
6264 TYPE_REFERENCE_TO (t
) = 0;
6266 /* Set the canonical type either to a new equivalence class, or
6267 propagate the need for structural equality checks. */
6268 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
6269 SET_TYPE_STRUCTURAL_EQUALITY (t
);
6271 TYPE_CANONICAL (t
) = t
;
6273 /* Make it its own variant. */
6274 TYPE_MAIN_VARIANT (t
) = t
;
6275 TYPE_NEXT_VARIANT (t
) = 0;
6277 /* Note that it is now possible for TYPE_MIN_VALUE to be a value
6278 whose TREE_TYPE is not t. This can also happen in the Ada
6279 frontend when using subtypes. */
6284 /* Create a new variant of TYPE, equivalent but distinct. This is so
6285 the caller can modify it. TYPE_CANONICAL for the return type will
6286 be equivalent to TYPE_CANONICAL of TYPE, indicating that the types
6287 are considered equal by the language itself (or that both types
6288 require structural equality checks). */
6291 build_variant_type_copy (tree type
)
6293 tree t
, m
= TYPE_MAIN_VARIANT (type
);
6295 t
= build_distinct_type_copy (type
);
6297 /* Since we're building a variant, assume that it is a non-semantic
6298 variant. This also propagates TYPE_STRUCTURAL_EQUALITY_P. */
6299 TYPE_CANONICAL (t
) = TYPE_CANONICAL (type
);
6301 /* Add the new type to the chain of variants of TYPE. */
6302 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (m
);
6303 TYPE_NEXT_VARIANT (m
) = t
;
6304 TYPE_MAIN_VARIANT (t
) = m
;
6309 /* Return true if the from tree in both tree maps are equal. */
6312 tree_map_base_eq (const void *va
, const void *vb
)
6314 const struct tree_map_base
*const a
= (const struct tree_map_base
*) va
,
6315 *const b
= (const struct tree_map_base
*) vb
;
6316 return (a
->from
== b
->from
);
6319 /* Hash a from tree in a tree_base_map. */
6322 tree_map_base_hash (const void *item
)
6324 return htab_hash_pointer (((const struct tree_map_base
*)item
)->from
);
6327 /* Return true if this tree map structure is marked for garbage collection
6328 purposes. We simply return true if the from tree is marked, so that this
6329 structure goes away when the from tree goes away. */
6332 tree_map_base_marked_p (const void *p
)
6334 return ggc_marked_p (((const struct tree_map_base
*) p
)->from
);
6337 /* Hash a from tree in a tree_map. */
6340 tree_map_hash (const void *item
)
6342 return (((const struct tree_map
*) item
)->hash
);
6345 /* Hash a from tree in a tree_decl_map. */
6348 tree_decl_map_hash (const void *item
)
6350 return DECL_UID (((const struct tree_decl_map
*) item
)->base
.from
);
6353 /* Return the initialization priority for DECL. */
6356 decl_init_priority_lookup (tree decl
)
6358 struct tree_priority_map
*h
;
6359 struct tree_map_base in
;
6361 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
6363 h
= (struct tree_priority_map
*) htab_find (init_priority_for_decl
, &in
);
6364 return h
? h
->init
: DEFAULT_INIT_PRIORITY
;
6367 /* Return the finalization priority for DECL. */
6370 decl_fini_priority_lookup (tree decl
)
6372 struct tree_priority_map
*h
;
6373 struct tree_map_base in
;
6375 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
);
6377 h
= (struct tree_priority_map
*) htab_find (init_priority_for_decl
, &in
);
6378 return h
? h
->fini
: DEFAULT_INIT_PRIORITY
;
6381 /* Return the initialization and finalization priority information for
6382 DECL. If there is no previous priority information, a freshly
6383 allocated structure is returned. */
6385 static struct tree_priority_map
*
6386 decl_priority_info (tree decl
)
6388 struct tree_priority_map in
;
6389 struct tree_priority_map
*h
;
6392 in
.base
.from
= decl
;
6393 loc
= htab_find_slot (init_priority_for_decl
, &in
, INSERT
);
6394 h
= (struct tree_priority_map
*) *loc
;
6397 h
= ggc_alloc_cleared_tree_priority_map ();
6399 h
->base
.from
= decl
;
6400 h
->init
= DEFAULT_INIT_PRIORITY
;
6401 h
->fini
= DEFAULT_INIT_PRIORITY
;
6407 /* Set the initialization priority for DECL to PRIORITY. */
6410 decl_init_priority_insert (tree decl
, priority_type priority
)
6412 struct tree_priority_map
*h
;
6414 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
6415 if (priority
== DEFAULT_INIT_PRIORITY
)
6417 h
= decl_priority_info (decl
);
6421 /* Set the finalization priority for DECL to PRIORITY. */
6424 decl_fini_priority_insert (tree decl
, priority_type priority
)
6426 struct tree_priority_map
*h
;
6428 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
);
6429 if (priority
== DEFAULT_INIT_PRIORITY
)
6431 h
= decl_priority_info (decl
);
6435 /* Print out the statistics for the DECL_DEBUG_EXPR hash table. */
6438 print_debug_expr_statistics (void)
6440 fprintf (stderr
, "DECL_DEBUG_EXPR hash: size %ld, %ld elements, %f collisions\n",
6441 (long) htab_size (debug_expr_for_decl
),
6442 (long) htab_elements (debug_expr_for_decl
),
6443 htab_collisions (debug_expr_for_decl
));
6446 /* Print out the statistics for the DECL_VALUE_EXPR hash table. */
6449 print_value_expr_statistics (void)
6451 fprintf (stderr
, "DECL_VALUE_EXPR hash: size %ld, %ld elements, %f collisions\n",
6452 (long) htab_size (value_expr_for_decl
),
6453 (long) htab_elements (value_expr_for_decl
),
6454 htab_collisions (value_expr_for_decl
));
6457 /* Lookup a debug expression for FROM, and return it if we find one. */
6460 decl_debug_expr_lookup (tree from
)
6462 struct tree_decl_map
*h
, in
;
6463 in
.base
.from
= from
;
6465 h
= (struct tree_decl_map
*)
6466 htab_find_with_hash (debug_expr_for_decl
, &in
, DECL_UID (from
));
6472 /* Insert a mapping FROM->TO in the debug expression hashtable. */
6475 decl_debug_expr_insert (tree from
, tree to
)
6477 struct tree_decl_map
*h
;
6480 h
= ggc_alloc_tree_decl_map ();
6481 h
->base
.from
= from
;
6483 loc
= htab_find_slot_with_hash (debug_expr_for_decl
, h
, DECL_UID (from
),
6485 *(struct tree_decl_map
**) loc
= h
;
6488 /* Lookup a value expression for FROM, and return it if we find one. */
6491 decl_value_expr_lookup (tree from
)
6493 struct tree_decl_map
*h
, in
;
6494 in
.base
.from
= from
;
6496 h
= (struct tree_decl_map
*)
6497 htab_find_with_hash (value_expr_for_decl
, &in
, DECL_UID (from
));
6503 /* Insert a mapping FROM->TO in the value expression hashtable. */
6506 decl_value_expr_insert (tree from
, tree to
)
6508 struct tree_decl_map
*h
;
6511 h
= ggc_alloc_tree_decl_map ();
6512 h
->base
.from
= from
;
6514 loc
= htab_find_slot_with_hash (value_expr_for_decl
, h
, DECL_UID (from
),
6516 *(struct tree_decl_map
**) loc
= h
;
6519 /* Lookup a vector of debug arguments for FROM, and return it if we
6523 decl_debug_args_lookup (tree from
)
6525 struct tree_vec_map
*h
, in
;
6527 if (!DECL_HAS_DEBUG_ARGS_P (from
))
6529 gcc_checking_assert (debug_args_for_decl
!= NULL
);
6530 in
.base
.from
= from
;
6531 h
= (struct tree_vec_map
*)
6532 htab_find_with_hash (debug_args_for_decl
, &in
, DECL_UID (from
));
6538 /* Insert a mapping FROM->empty vector of debug arguments in the value
6539 expression hashtable. */
6542 decl_debug_args_insert (tree from
)
6544 struct tree_vec_map
*h
;
6547 if (DECL_HAS_DEBUG_ARGS_P (from
))
6548 return decl_debug_args_lookup (from
);
6549 if (debug_args_for_decl
== NULL
)
6550 debug_args_for_decl
= htab_create_ggc (64, tree_vec_map_hash
,
6551 tree_vec_map_eq
, 0);
6552 h
= ggc_alloc_tree_vec_map ();
6553 h
->base
.from
= from
;
6555 loc
= htab_find_slot_with_hash (debug_args_for_decl
, h
, DECL_UID (from
),
6557 *(struct tree_vec_map
**) loc
= h
;
6558 DECL_HAS_DEBUG_ARGS_P (from
) = 1;
6562 /* Hashing of types so that we don't make duplicates.
6563 The entry point is `type_hash_canon'. */
6565 /* Compute a hash code for a list of types (chain of TREE_LIST nodes
6566 with types in the TREE_VALUE slots), by adding the hash codes
6567 of the individual types. */
6570 type_hash_list (const_tree list
, hashval_t hashcode
)
6574 for (tail
= list
; tail
; tail
= TREE_CHAIN (tail
))
6575 if (TREE_VALUE (tail
) != error_mark_node
)
6576 hashcode
= iterative_hash_object (TYPE_HASH (TREE_VALUE (tail
)),
6582 /* These are the Hashtable callback functions. */
6584 /* Returns true iff the types are equivalent. */
6587 type_hash_eq (const void *va
, const void *vb
)
6589 const struct type_hash
*const a
= (const struct type_hash
*) va
,
6590 *const b
= (const struct type_hash
*) vb
;
6592 /* First test the things that are the same for all types. */
6593 if (a
->hash
!= b
->hash
6594 || TREE_CODE (a
->type
) != TREE_CODE (b
->type
)
6595 || TREE_TYPE (a
->type
) != TREE_TYPE (b
->type
)
6596 || !attribute_list_equal (TYPE_ATTRIBUTES (a
->type
),
6597 TYPE_ATTRIBUTES (b
->type
))
6598 || (TREE_CODE (a
->type
) != COMPLEX_TYPE
6599 && TYPE_NAME (a
->type
) != TYPE_NAME (b
->type
)))
6602 /* Be careful about comparing arrays before and after the element type
6603 has been completed; don't compare TYPE_ALIGN unless both types are
6605 if (COMPLETE_TYPE_P (a
->type
) && COMPLETE_TYPE_P (b
->type
)
6606 && (TYPE_ALIGN (a
->type
) != TYPE_ALIGN (b
->type
)
6607 || TYPE_MODE (a
->type
) != TYPE_MODE (b
->type
)))
6610 switch (TREE_CODE (a
->type
))
6615 case REFERENCE_TYPE
:
6620 return TYPE_VECTOR_SUBPARTS (a
->type
) == TYPE_VECTOR_SUBPARTS (b
->type
);
6623 if (TYPE_VALUES (a
->type
) != TYPE_VALUES (b
->type
)
6624 && !(TYPE_VALUES (a
->type
)
6625 && TREE_CODE (TYPE_VALUES (a
->type
)) == TREE_LIST
6626 && TYPE_VALUES (b
->type
)
6627 && TREE_CODE (TYPE_VALUES (b
->type
)) == TREE_LIST
6628 && type_list_equal (TYPE_VALUES (a
->type
),
6629 TYPE_VALUES (b
->type
))))
6632 /* ... fall through ... */
6637 return ((TYPE_MAX_VALUE (a
->type
) == TYPE_MAX_VALUE (b
->type
)
6638 || tree_int_cst_equal (TYPE_MAX_VALUE (a
->type
),
6639 TYPE_MAX_VALUE (b
->type
)))
6640 && (TYPE_MIN_VALUE (a
->type
) == TYPE_MIN_VALUE (b
->type
)
6641 || tree_int_cst_equal (TYPE_MIN_VALUE (a
->type
),
6642 TYPE_MIN_VALUE (b
->type
))));
6644 case FIXED_POINT_TYPE
:
6645 return TYPE_SATURATING (a
->type
) == TYPE_SATURATING (b
->type
);
6648 return TYPE_OFFSET_BASETYPE (a
->type
) == TYPE_OFFSET_BASETYPE (b
->type
);
6651 if (TYPE_METHOD_BASETYPE (a
->type
) == TYPE_METHOD_BASETYPE (b
->type
)
6652 && (TYPE_ARG_TYPES (a
->type
) == TYPE_ARG_TYPES (b
->type
)
6653 || (TYPE_ARG_TYPES (a
->type
)
6654 && TREE_CODE (TYPE_ARG_TYPES (a
->type
)) == TREE_LIST
6655 && TYPE_ARG_TYPES (b
->type
)
6656 && TREE_CODE (TYPE_ARG_TYPES (b
->type
)) == TREE_LIST
6657 && type_list_equal (TYPE_ARG_TYPES (a
->type
),
6658 TYPE_ARG_TYPES (b
->type
)))))
6662 return TYPE_DOMAIN (a
->type
) == TYPE_DOMAIN (b
->type
);
6666 case QUAL_UNION_TYPE
:
6667 return (TYPE_FIELDS (a
->type
) == TYPE_FIELDS (b
->type
)
6668 || (TYPE_FIELDS (a
->type
)
6669 && TREE_CODE (TYPE_FIELDS (a
->type
)) == TREE_LIST
6670 && TYPE_FIELDS (b
->type
)
6671 && TREE_CODE (TYPE_FIELDS (b
->type
)) == TREE_LIST
6672 && type_list_equal (TYPE_FIELDS (a
->type
),
6673 TYPE_FIELDS (b
->type
))));
6676 if (TYPE_ARG_TYPES (a
->type
) == TYPE_ARG_TYPES (b
->type
)
6677 || (TYPE_ARG_TYPES (a
->type
)
6678 && TREE_CODE (TYPE_ARG_TYPES (a
->type
)) == TREE_LIST
6679 && TYPE_ARG_TYPES (b
->type
)
6680 && TREE_CODE (TYPE_ARG_TYPES (b
->type
)) == TREE_LIST
6681 && type_list_equal (TYPE_ARG_TYPES (a
->type
),
6682 TYPE_ARG_TYPES (b
->type
))))
6690 if (lang_hooks
.types
.type_hash_eq
!= NULL
)
6691 return lang_hooks
.types
.type_hash_eq (a
->type
, b
->type
);
6696 /* Return the cached hash value. */
6699 type_hash_hash (const void *item
)
6701 return ((const struct type_hash
*) item
)->hash
;
6704 /* Look in the type hash table for a type isomorphic to TYPE.
6705 If one is found, return it. Otherwise return 0. */
6708 type_hash_lookup (hashval_t hashcode
, tree type
)
6710 struct type_hash
*h
, in
;
6712 /* The TYPE_ALIGN field of a type is set by layout_type(), so we
6713 must call that routine before comparing TYPE_ALIGNs. */
6719 h
= (struct type_hash
*) htab_find_with_hash (type_hash_table
, &in
,
6726 /* Add an entry to the type-hash-table
6727 for a type TYPE whose hash code is HASHCODE. */
6730 type_hash_add (hashval_t hashcode
, tree type
)
6732 struct type_hash
*h
;
6735 h
= ggc_alloc_type_hash ();
6738 loc
= htab_find_slot_with_hash (type_hash_table
, h
, hashcode
, INSERT
);
6742 /* Given TYPE, and HASHCODE its hash code, return the canonical
6743 object for an identical type if one already exists.
6744 Otherwise, return TYPE, and record it as the canonical object.
6746 To use this function, first create a type of the sort you want.
6747 Then compute its hash code from the fields of the type that
6748 make it different from other similar types.
6749 Then call this function and use the value. */
6752 type_hash_canon (unsigned int hashcode
, tree type
)
6756 /* The hash table only contains main variants, so ensure that's what we're
6758 gcc_assert (TYPE_MAIN_VARIANT (type
) == type
);
6760 /* See if the type is in the hash table already. If so, return it.
6761 Otherwise, add the type. */
6762 t1
= type_hash_lookup (hashcode
, type
);
6765 if (GATHER_STATISTICS
)
6767 tree_code_counts
[(int) TREE_CODE (type
)]--;
6768 tree_node_counts
[(int) t_kind
]--;
6769 tree_node_sizes
[(int) t_kind
] -= sizeof (struct tree_type_non_common
);
6775 type_hash_add (hashcode
, type
);
6780 /* See if the data pointed to by the type hash table is marked. We consider
6781 it marked if the type is marked or if a debug type number or symbol
6782 table entry has been made for the type. */
6785 type_hash_marked_p (const void *p
)
6787 const_tree
const type
= ((const struct type_hash
*) p
)->type
;
6789 return ggc_marked_p (type
);
6793 print_type_hash_statistics (void)
6795 fprintf (stderr
, "Type hash: size %ld, %ld elements, %f collisions\n",
6796 (long) htab_size (type_hash_table
),
6797 (long) htab_elements (type_hash_table
),
6798 htab_collisions (type_hash_table
));
6801 /* Compute a hash code for a list of attributes (chain of TREE_LIST nodes
6802 with names in the TREE_PURPOSE slots and args in the TREE_VALUE slots),
6803 by adding the hash codes of the individual attributes. */
6806 attribute_hash_list (const_tree list
, hashval_t hashcode
)
6810 for (tail
= list
; tail
; tail
= TREE_CHAIN (tail
))
6811 /* ??? Do we want to add in TREE_VALUE too? */
6812 hashcode
= iterative_hash_object
6813 (IDENTIFIER_HASH_VALUE (get_attribute_name (tail
)), hashcode
);
6817 /* Given two lists of attributes, return true if list l2 is
6818 equivalent to l1. */
6821 attribute_list_equal (const_tree l1
, const_tree l2
)
6826 return attribute_list_contained (l1
, l2
)
6827 && attribute_list_contained (l2
, l1
);
6830 /* Given two lists of attributes, return true if list L2 is
6831 completely contained within L1. */
6832 /* ??? This would be faster if attribute names were stored in a canonicalized
6833 form. Otherwise, if L1 uses `foo' and L2 uses `__foo__', the long method
6834 must be used to show these elements are equivalent (which they are). */
6835 /* ??? It's not clear that attributes with arguments will always be handled
6839 attribute_list_contained (const_tree l1
, const_tree l2
)
6843 /* First check the obvious, maybe the lists are identical. */
6847 /* Maybe the lists are similar. */
6848 for (t1
= l1
, t2
= l2
;
6850 && get_attribute_name (t1
) == get_attribute_name (t2
)
6851 && TREE_VALUE (t1
) == TREE_VALUE (t2
);
6852 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
6855 /* Maybe the lists are equal. */
6856 if (t1
== 0 && t2
== 0)
6859 for (; t2
!= 0; t2
= TREE_CHAIN (t2
))
6862 /* This CONST_CAST is okay because lookup_attribute does not
6863 modify its argument and the return value is assigned to a
6865 for (attr
= lookup_ident_attribute (get_attribute_name (t2
),
6866 CONST_CAST_TREE (l1
));
6867 attr
!= NULL_TREE
&& !attribute_value_equal (t2
, attr
);
6868 attr
= lookup_ident_attribute (get_attribute_name (t2
),
6872 if (attr
== NULL_TREE
)
6879 /* Given two lists of types
6880 (chains of TREE_LIST nodes with types in the TREE_VALUE slots)
6881 return 1 if the lists contain the same types in the same order.
6882 Also, the TREE_PURPOSEs must match. */
6885 type_list_equal (const_tree l1
, const_tree l2
)
6889 for (t1
= l1
, t2
= l2
; t1
&& t2
; t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
6890 if (TREE_VALUE (t1
) != TREE_VALUE (t2
)
6891 || (TREE_PURPOSE (t1
) != TREE_PURPOSE (t2
)
6892 && ! (1 == simple_cst_equal (TREE_PURPOSE (t1
), TREE_PURPOSE (t2
))
6893 && (TREE_TYPE (TREE_PURPOSE (t1
))
6894 == TREE_TYPE (TREE_PURPOSE (t2
))))))
6900 /* Returns the number of arguments to the FUNCTION_TYPE or METHOD_TYPE
6901 given by TYPE. If the argument list accepts variable arguments,
6902 then this function counts only the ordinary arguments. */
6905 type_num_arguments (const_tree type
)
6910 for (t
= TYPE_ARG_TYPES (type
); t
; t
= TREE_CHAIN (t
))
6911 /* If the function does not take a variable number of arguments,
6912 the last element in the list will have type `void'. */
6913 if (VOID_TYPE_P (TREE_VALUE (t
)))
6921 /* Nonzero if integer constants T1 and T2
6922 represent the same constant value. */
6925 tree_int_cst_equal (const_tree t1
, const_tree t2
)
6930 if (t1
== 0 || t2
== 0)
6933 if (TREE_CODE (t1
) == INTEGER_CST
6934 && TREE_CODE (t2
) == INTEGER_CST
6935 && TREE_INT_CST_LOW (t1
) == TREE_INT_CST_LOW (t2
)
6936 && TREE_INT_CST_HIGH (t1
) == TREE_INT_CST_HIGH (t2
))
6942 /* Nonzero if integer constants T1 and T2 represent values that satisfy <.
6943 The precise way of comparison depends on their data type. */
6946 tree_int_cst_lt (const_tree t1
, const_tree t2
)
6951 if (TYPE_UNSIGNED (TREE_TYPE (t1
)) != TYPE_UNSIGNED (TREE_TYPE (t2
)))
6953 int t1_sgn
= tree_int_cst_sgn (t1
);
6954 int t2_sgn
= tree_int_cst_sgn (t2
);
6956 if (t1_sgn
< t2_sgn
)
6958 else if (t1_sgn
> t2_sgn
)
6960 /* Otherwise, both are non-negative, so we compare them as
6961 unsigned just in case one of them would overflow a signed
6964 else if (!TYPE_UNSIGNED (TREE_TYPE (t1
)))
6965 return INT_CST_LT (t1
, t2
);
6967 return INT_CST_LT_UNSIGNED (t1
, t2
);
6970 /* Returns -1 if T1 < T2, 0 if T1 == T2, and 1 if T1 > T2. */
6973 tree_int_cst_compare (const_tree t1
, const_tree t2
)
6975 if (tree_int_cst_lt (t1
, t2
))
6977 else if (tree_int_cst_lt (t2
, t1
))
6983 /* Return true if T is an INTEGER_CST whose numerical value (extended
6984 according to TYPE_UNSIGNED) fits in a signed HOST_WIDE_INT. */
6987 tree_fits_shwi_p (const_tree t
)
6989 return (t
!= NULL_TREE
6990 && TREE_CODE (t
) == INTEGER_CST
6991 && ((TREE_INT_CST_HIGH (t
) == 0
6992 && (HOST_WIDE_INT
) TREE_INT_CST_LOW (t
) >= 0)
6993 || (TREE_INT_CST_HIGH (t
) == -1
6994 && (HOST_WIDE_INT
) TREE_INT_CST_LOW (t
) < 0
6995 && !TYPE_UNSIGNED (TREE_TYPE (t
)))));
6998 /* Return true if T is an INTEGER_CST whose numerical value (extended
6999 according to TYPE_UNSIGNED) fits in an unsigned HOST_WIDE_INT. */
7002 tree_fits_uhwi_p (const_tree t
)
7004 return (t
!= NULL_TREE
7005 && TREE_CODE (t
) == INTEGER_CST
7006 && TREE_INT_CST_HIGH (t
) == 0);
7009 /* T is an INTEGER_CST whose numerical value (extended according to
7010 TYPE_UNSIGNED) fits in a signed HOST_WIDE_INT. Return that
7014 tree_to_shwi (const_tree t
)
7016 gcc_assert (tree_fits_shwi_p (t
));
7017 return TREE_INT_CST_LOW (t
);
7020 /* T is an INTEGER_CST whose numerical value (extended according to
7021 TYPE_UNSIGNED) fits in an unsigned HOST_WIDE_INT. Return that
7024 unsigned HOST_WIDE_INT
7025 tree_to_uhwi (const_tree t
)
7027 gcc_assert (tree_fits_uhwi_p (t
));
7028 return TREE_INT_CST_LOW (t
);
7031 /* Return the most significant (sign) bit of T. */
7034 tree_int_cst_sign_bit (const_tree t
)
7036 unsigned bitno
= TYPE_PRECISION (TREE_TYPE (t
)) - 1;
7037 unsigned HOST_WIDE_INT w
;
7039 if (bitno
< HOST_BITS_PER_WIDE_INT
)
7040 w
= TREE_INT_CST_LOW (t
);
7043 w
= TREE_INT_CST_HIGH (t
);
7044 bitno
-= HOST_BITS_PER_WIDE_INT
;
7047 return (w
>> bitno
) & 1;
7050 /* Return an indication of the sign of the integer constant T.
7051 The return value is -1 if T < 0, 0 if T == 0, and 1 if T > 0.
7052 Note that -1 will never be returned if T's type is unsigned. */
7055 tree_int_cst_sgn (const_tree t
)
7057 if (TREE_INT_CST_LOW (t
) == 0 && TREE_INT_CST_HIGH (t
) == 0)
7059 else if (TYPE_UNSIGNED (TREE_TYPE (t
)))
7061 else if (TREE_INT_CST_HIGH (t
) < 0)
7067 /* Return the minimum number of bits needed to represent VALUE in a
7068 signed or unsigned type, UNSIGNEDP says which. */
7071 tree_int_cst_min_precision (tree value
, bool unsignedp
)
7073 /* If the value is negative, compute its negative minus 1. The latter
7074 adjustment is because the absolute value of the largest negative value
7075 is one larger than the largest positive value. This is equivalent to
7076 a bit-wise negation, so use that operation instead. */
7078 if (tree_int_cst_sgn (value
) < 0)
7079 value
= fold_build1 (BIT_NOT_EXPR
, TREE_TYPE (value
), value
);
7081 /* Return the number of bits needed, taking into account the fact
7082 that we need one more bit for a signed than unsigned type.
7083 If value is 0 or -1, the minimum precision is 1 no matter
7084 whether unsignedp is true or false. */
7086 if (integer_zerop (value
))
7089 return tree_floor_log2 (value
) + 1 + !unsignedp
;
7092 /* Return truthvalue of whether T1 is the same tree structure as T2.
7093 Return 1 if they are the same.
7094 Return 0 if they are understandably different.
7095 Return -1 if either contains tree structure not understood by
7099 simple_cst_equal (const_tree t1
, const_tree t2
)
7101 enum tree_code code1
, code2
;
7107 if (t1
== 0 || t2
== 0)
7110 code1
= TREE_CODE (t1
);
7111 code2
= TREE_CODE (t2
);
7113 if (CONVERT_EXPR_CODE_P (code1
) || code1
== NON_LVALUE_EXPR
)
7115 if (CONVERT_EXPR_CODE_P (code2
)
7116 || code2
== NON_LVALUE_EXPR
)
7117 return simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
7119 return simple_cst_equal (TREE_OPERAND (t1
, 0), t2
);
7122 else if (CONVERT_EXPR_CODE_P (code2
)
7123 || code2
== NON_LVALUE_EXPR
)
7124 return simple_cst_equal (t1
, TREE_OPERAND (t2
, 0));
7132 return (TREE_INT_CST_LOW (t1
) == TREE_INT_CST_LOW (t2
)
7133 && TREE_INT_CST_HIGH (t1
) == TREE_INT_CST_HIGH (t2
));
7136 return REAL_VALUES_IDENTICAL (TREE_REAL_CST (t1
), TREE_REAL_CST (t2
));
7139 return FIXED_VALUES_IDENTICAL (TREE_FIXED_CST (t1
), TREE_FIXED_CST (t2
));
7142 return (TREE_STRING_LENGTH (t1
) == TREE_STRING_LENGTH (t2
)
7143 && ! memcmp (TREE_STRING_POINTER (t1
), TREE_STRING_POINTER (t2
),
7144 TREE_STRING_LENGTH (t1
)));
7148 unsigned HOST_WIDE_INT idx
;
7149 vec
<constructor_elt
, va_gc
> *v1
= CONSTRUCTOR_ELTS (t1
);
7150 vec
<constructor_elt
, va_gc
> *v2
= CONSTRUCTOR_ELTS (t2
);
7152 if (vec_safe_length (v1
) != vec_safe_length (v2
))
7155 for (idx
= 0; idx
< vec_safe_length (v1
); ++idx
)
7156 /* ??? Should we handle also fields here? */
7157 if (!simple_cst_equal ((*v1
)[idx
].value
, (*v2
)[idx
].value
))
7163 return simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
7166 cmp
= simple_cst_equal (CALL_EXPR_FN (t1
), CALL_EXPR_FN (t2
));
7169 if (call_expr_nargs (t1
) != call_expr_nargs (t2
))
7172 const_tree arg1
, arg2
;
7173 const_call_expr_arg_iterator iter1
, iter2
;
7174 for (arg1
= first_const_call_expr_arg (t1
, &iter1
),
7175 arg2
= first_const_call_expr_arg (t2
, &iter2
);
7177 arg1
= next_const_call_expr_arg (&iter1
),
7178 arg2
= next_const_call_expr_arg (&iter2
))
7180 cmp
= simple_cst_equal (arg1
, arg2
);
7184 return arg1
== arg2
;
7188 /* Special case: if either target is an unallocated VAR_DECL,
7189 it means that it's going to be unified with whatever the
7190 TARGET_EXPR is really supposed to initialize, so treat it
7191 as being equivalent to anything. */
7192 if ((TREE_CODE (TREE_OPERAND (t1
, 0)) == VAR_DECL
7193 && DECL_NAME (TREE_OPERAND (t1
, 0)) == NULL_TREE
7194 && !DECL_RTL_SET_P (TREE_OPERAND (t1
, 0)))
7195 || (TREE_CODE (TREE_OPERAND (t2
, 0)) == VAR_DECL
7196 && DECL_NAME (TREE_OPERAND (t2
, 0)) == NULL_TREE
7197 && !DECL_RTL_SET_P (TREE_OPERAND (t2
, 0))))
7200 cmp
= simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
7205 return simple_cst_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t2
, 1));
7207 case WITH_CLEANUP_EXPR
:
7208 cmp
= simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
7212 return simple_cst_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t1
, 1));
7215 if (TREE_OPERAND (t1
, 1) == TREE_OPERAND (t2
, 1))
7216 return simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
7230 /* This general rule works for most tree codes. All exceptions should be
7231 handled above. If this is a language-specific tree code, we can't
7232 trust what might be in the operand, so say we don't know
7234 if ((int) code1
>= (int) LAST_AND_UNUSED_TREE_CODE
)
7237 switch (TREE_CODE_CLASS (code1
))
7241 case tcc_comparison
:
7242 case tcc_expression
:
7246 for (i
= 0; i
< TREE_CODE_LENGTH (code1
); i
++)
7248 cmp
= simple_cst_equal (TREE_OPERAND (t1
, i
), TREE_OPERAND (t2
, i
));
7260 /* Compare the value of T, an INTEGER_CST, with U, an unsigned integer value.
7261 Return -1, 0, or 1 if the value of T is less than, equal to, or greater
7262 than U, respectively. */
7265 compare_tree_int (const_tree t
, unsigned HOST_WIDE_INT u
)
7267 if (tree_int_cst_sgn (t
) < 0)
7269 else if (TREE_INT_CST_HIGH (t
) != 0)
7271 else if (TREE_INT_CST_LOW (t
) == u
)
7273 else if (TREE_INT_CST_LOW (t
) < u
)
7279 /* Return true if SIZE represents a constant size that is in bounds of
7280 what the middle-end and the backend accepts (covering not more than
7281 half of the address-space). */
7284 valid_constant_size_p (const_tree size
)
7286 if (! tree_fits_uhwi_p (size
)
7287 || TREE_OVERFLOW (size
)
7288 || tree_int_cst_sign_bit (size
) != 0)
7293 /* Return the precision of the type, or for a complex or vector type the
7294 precision of the type of its elements. */
7297 element_precision (const_tree type
)
7299 enum tree_code code
= TREE_CODE (type
);
7300 if (code
== COMPLEX_TYPE
|| code
== VECTOR_TYPE
)
7301 type
= TREE_TYPE (type
);
7303 return TYPE_PRECISION (type
);
7306 /* Return true if CODE represents an associative tree code. Otherwise
7309 associative_tree_code (enum tree_code code
)
7328 /* Return true if CODE represents a commutative tree code. Otherwise
7331 commutative_tree_code (enum tree_code code
)
7337 case MULT_HIGHPART_EXPR
:
7345 case UNORDERED_EXPR
:
7349 case TRUTH_AND_EXPR
:
7350 case TRUTH_XOR_EXPR
:
7352 case WIDEN_MULT_EXPR
:
7353 case VEC_WIDEN_MULT_HI_EXPR
:
7354 case VEC_WIDEN_MULT_LO_EXPR
:
7355 case VEC_WIDEN_MULT_EVEN_EXPR
:
7356 case VEC_WIDEN_MULT_ODD_EXPR
:
7365 /* Return true if CODE represents a ternary tree code for which the
7366 first two operands are commutative. Otherwise return false. */
7368 commutative_ternary_tree_code (enum tree_code code
)
7372 case WIDEN_MULT_PLUS_EXPR
:
7373 case WIDEN_MULT_MINUS_EXPR
:
7382 /* Generate a hash value for an expression. This can be used iteratively
7383 by passing a previous result as the VAL argument.
7385 This function is intended to produce the same hash for expressions which
7386 would compare equal using operand_equal_p. */
7389 iterative_hash_expr (const_tree t
, hashval_t val
)
7392 enum tree_code code
;
7396 return iterative_hash_hashval_t (0, val
);
7398 code
= TREE_CODE (t
);
7402 /* Alas, constants aren't shared, so we can't rely on pointer
7405 val
= iterative_hash_host_wide_int (TREE_INT_CST_LOW (t
), val
);
7406 return iterative_hash_host_wide_int (TREE_INT_CST_HIGH (t
), val
);
7409 unsigned int val2
= real_hash (TREE_REAL_CST_PTR (t
));
7411 return iterative_hash_hashval_t (val2
, val
);
7415 unsigned int val2
= fixed_hash (TREE_FIXED_CST_PTR (t
));
7417 return iterative_hash_hashval_t (val2
, val
);
7420 return iterative_hash (TREE_STRING_POINTER (t
),
7421 TREE_STRING_LENGTH (t
), val
);
7423 val
= iterative_hash_expr (TREE_REALPART (t
), val
);
7424 return iterative_hash_expr (TREE_IMAGPART (t
), val
);
7428 for (i
= 0; i
< VECTOR_CST_NELTS (t
); ++i
)
7429 val
= iterative_hash_expr (VECTOR_CST_ELT (t
, i
), val
);
7433 /* We can just compare by pointer. */
7434 return iterative_hash_host_wide_int (SSA_NAME_VERSION (t
), val
);
7435 case PLACEHOLDER_EXPR
:
7436 /* The node itself doesn't matter. */
7439 /* A list of expressions, for a CALL_EXPR or as the elements of a
7441 for (; t
; t
= TREE_CHAIN (t
))
7442 val
= iterative_hash_expr (TREE_VALUE (t
), val
);
7446 unsigned HOST_WIDE_INT idx
;
7448 FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (t
), idx
, field
, value
)
7450 val
= iterative_hash_expr (field
, val
);
7451 val
= iterative_hash_expr (value
, val
);
7456 /* When referring to a built-in FUNCTION_DECL, use the __builtin__ form.
7457 Otherwise nodes that compare equal according to operand_equal_p might
7458 get different hash codes. However, don't do this for machine specific
7459 or front end builtins, since the function code is overloaded in those
7461 if (DECL_BUILT_IN_CLASS (t
) == BUILT_IN_NORMAL
7462 && builtin_decl_explicit_p (DECL_FUNCTION_CODE (t
)))
7464 t
= builtin_decl_explicit (DECL_FUNCTION_CODE (t
));
7465 code
= TREE_CODE (t
);
7469 tclass
= TREE_CODE_CLASS (code
);
7471 if (tclass
== tcc_declaration
)
7473 /* DECL's have a unique ID */
7474 val
= iterative_hash_host_wide_int (DECL_UID (t
), val
);
7478 gcc_assert (IS_EXPR_CODE_CLASS (tclass
));
7480 val
= iterative_hash_object (code
, val
);
7482 /* Don't hash the type, that can lead to having nodes which
7483 compare equal according to operand_equal_p, but which
7484 have different hash codes. */
7485 if (CONVERT_EXPR_CODE_P (code
)
7486 || code
== NON_LVALUE_EXPR
)
7488 /* Make sure to include signness in the hash computation. */
7489 val
+= TYPE_UNSIGNED (TREE_TYPE (t
));
7490 val
= iterative_hash_expr (TREE_OPERAND (t
, 0), val
);
7493 else if (commutative_tree_code (code
))
7495 /* It's a commutative expression. We want to hash it the same
7496 however it appears. We do this by first hashing both operands
7497 and then rehashing based on the order of their independent
7499 hashval_t one
= iterative_hash_expr (TREE_OPERAND (t
, 0), 0);
7500 hashval_t two
= iterative_hash_expr (TREE_OPERAND (t
, 1), 0);
7504 t
= one
, one
= two
, two
= t
;
7506 val
= iterative_hash_hashval_t (one
, val
);
7507 val
= iterative_hash_hashval_t (two
, val
);
7510 for (i
= TREE_OPERAND_LENGTH (t
) - 1; i
>= 0; --i
)
7511 val
= iterative_hash_expr (TREE_OPERAND (t
, i
), val
);
7517 /* Constructors for pointer, array and function types.
7518 (RECORD_TYPE, UNION_TYPE and ENUMERAL_TYPE nodes are
7519 constructed by language-dependent code, not here.) */
7521 /* Construct, lay out and return the type of pointers to TO_TYPE with
7522 mode MODE. If CAN_ALIAS_ALL is TRUE, indicate this type can
7523 reference all of memory. If such a type has already been
7524 constructed, reuse it. */
7527 build_pointer_type_for_mode (tree to_type
, enum machine_mode mode
,
7532 if (to_type
== error_mark_node
)
7533 return error_mark_node
;
7535 /* If the pointed-to type has the may_alias attribute set, force
7536 a TYPE_REF_CAN_ALIAS_ALL pointer to be generated. */
7537 if (lookup_attribute ("may_alias", TYPE_ATTRIBUTES (to_type
)))
7538 can_alias_all
= true;
7540 /* In some cases, languages will have things that aren't a POINTER_TYPE
7541 (such as a RECORD_TYPE for fat pointers in Ada) as TYPE_POINTER_TO.
7542 In that case, return that type without regard to the rest of our
7545 ??? This is a kludge, but consistent with the way this function has
7546 always operated and there doesn't seem to be a good way to avoid this
7548 if (TYPE_POINTER_TO (to_type
) != 0
7549 && TREE_CODE (TYPE_POINTER_TO (to_type
)) != POINTER_TYPE
)
7550 return TYPE_POINTER_TO (to_type
);
7552 /* First, if we already have a type for pointers to TO_TYPE and it's
7553 the proper mode, use it. */
7554 for (t
= TYPE_POINTER_TO (to_type
); t
; t
= TYPE_NEXT_PTR_TO (t
))
7555 if (TYPE_MODE (t
) == mode
&& TYPE_REF_CAN_ALIAS_ALL (t
) == can_alias_all
)
7558 t
= make_node (POINTER_TYPE
);
7560 TREE_TYPE (t
) = to_type
;
7561 SET_TYPE_MODE (t
, mode
);
7562 TYPE_REF_CAN_ALIAS_ALL (t
) = can_alias_all
;
7563 TYPE_NEXT_PTR_TO (t
) = TYPE_POINTER_TO (to_type
);
7564 TYPE_POINTER_TO (to_type
) = t
;
7566 if (TYPE_STRUCTURAL_EQUALITY_P (to_type
))
7567 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7568 else if (TYPE_CANONICAL (to_type
) != to_type
)
7570 = build_pointer_type_for_mode (TYPE_CANONICAL (to_type
),
7571 mode
, can_alias_all
);
7573 /* Lay out the type. This function has many callers that are concerned
7574 with expression-construction, and this simplifies them all. */
7580 /* By default build pointers in ptr_mode. */
7583 build_pointer_type (tree to_type
)
7585 addr_space_t as
= to_type
== error_mark_node
? ADDR_SPACE_GENERIC
7586 : TYPE_ADDR_SPACE (to_type
);
7587 enum machine_mode pointer_mode
= targetm
.addr_space
.pointer_mode (as
);
7588 return build_pointer_type_for_mode (to_type
, pointer_mode
, false);
7591 /* Same as build_pointer_type_for_mode, but for REFERENCE_TYPE. */
7594 build_reference_type_for_mode (tree to_type
, enum machine_mode mode
,
7599 if (to_type
== error_mark_node
)
7600 return error_mark_node
;
7602 /* If the pointed-to type has the may_alias attribute set, force
7603 a TYPE_REF_CAN_ALIAS_ALL pointer to be generated. */
7604 if (lookup_attribute ("may_alias", TYPE_ATTRIBUTES (to_type
)))
7605 can_alias_all
= true;
7607 /* In some cases, languages will have things that aren't a REFERENCE_TYPE
7608 (such as a RECORD_TYPE for fat pointers in Ada) as TYPE_REFERENCE_TO.
7609 In that case, return that type without regard to the rest of our
7612 ??? This is a kludge, but consistent with the way this function has
7613 always operated and there doesn't seem to be a good way to avoid this
7615 if (TYPE_REFERENCE_TO (to_type
) != 0
7616 && TREE_CODE (TYPE_REFERENCE_TO (to_type
)) != REFERENCE_TYPE
)
7617 return TYPE_REFERENCE_TO (to_type
);
7619 /* First, if we already have a type for pointers to TO_TYPE and it's
7620 the proper mode, use it. */
7621 for (t
= TYPE_REFERENCE_TO (to_type
); t
; t
= TYPE_NEXT_REF_TO (t
))
7622 if (TYPE_MODE (t
) == mode
&& TYPE_REF_CAN_ALIAS_ALL (t
) == can_alias_all
)
7625 t
= make_node (REFERENCE_TYPE
);
7627 TREE_TYPE (t
) = to_type
;
7628 SET_TYPE_MODE (t
, mode
);
7629 TYPE_REF_CAN_ALIAS_ALL (t
) = can_alias_all
;
7630 TYPE_NEXT_REF_TO (t
) = TYPE_REFERENCE_TO (to_type
);
7631 TYPE_REFERENCE_TO (to_type
) = t
;
7633 if (TYPE_STRUCTURAL_EQUALITY_P (to_type
))
7634 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7635 else if (TYPE_CANONICAL (to_type
) != to_type
)
7637 = build_reference_type_for_mode (TYPE_CANONICAL (to_type
),
7638 mode
, can_alias_all
);
7646 /* Build the node for the type of references-to-TO_TYPE by default
7650 build_reference_type (tree to_type
)
7652 addr_space_t as
= to_type
== error_mark_node
? ADDR_SPACE_GENERIC
7653 : TYPE_ADDR_SPACE (to_type
);
7654 enum machine_mode pointer_mode
= targetm
.addr_space
.pointer_mode (as
);
7655 return build_reference_type_for_mode (to_type
, pointer_mode
, false);
7658 #define MAX_INT_CACHED_PREC \
7659 (HOST_BITS_PER_WIDE_INT > 64 ? HOST_BITS_PER_WIDE_INT : 64)
7660 static GTY(()) tree nonstandard_integer_type_cache
[2 * MAX_INT_CACHED_PREC
+ 2];
7662 /* Builds a signed or unsigned integer type of precision PRECISION.
7663 Used for C bitfields whose precision does not match that of
7664 built-in target types. */
7666 build_nonstandard_integer_type (unsigned HOST_WIDE_INT precision
,
7672 unsignedp
= MAX_INT_CACHED_PREC
+ 1;
7674 if (precision
<= MAX_INT_CACHED_PREC
)
7676 itype
= nonstandard_integer_type_cache
[precision
+ unsignedp
];
7681 itype
= make_node (INTEGER_TYPE
);
7682 TYPE_PRECISION (itype
) = precision
;
7685 fixup_unsigned_type (itype
);
7687 fixup_signed_type (itype
);
7690 if (tree_fits_uhwi_p (TYPE_MAX_VALUE (itype
)))
7691 ret
= type_hash_canon (tree_to_uhwi (TYPE_MAX_VALUE (itype
)), itype
);
7692 if (precision
<= MAX_INT_CACHED_PREC
)
7693 nonstandard_integer_type_cache
[precision
+ unsignedp
] = ret
;
7698 /* Create a range of some discrete type TYPE (an INTEGER_TYPE, ENUMERAL_TYPE
7699 or BOOLEAN_TYPE) with low bound LOWVAL and high bound HIGHVAL. If SHARED
7700 is true, reuse such a type that has already been constructed. */
7703 build_range_type_1 (tree type
, tree lowval
, tree highval
, bool shared
)
7705 tree itype
= make_node (INTEGER_TYPE
);
7706 hashval_t hashcode
= 0;
7708 TREE_TYPE (itype
) = type
;
7710 TYPE_MIN_VALUE (itype
) = fold_convert (type
, lowval
);
7711 TYPE_MAX_VALUE (itype
) = highval
? fold_convert (type
, highval
) : NULL
;
7713 TYPE_PRECISION (itype
) = TYPE_PRECISION (type
);
7714 SET_TYPE_MODE (itype
, TYPE_MODE (type
));
7715 TYPE_SIZE (itype
) = TYPE_SIZE (type
);
7716 TYPE_SIZE_UNIT (itype
) = TYPE_SIZE_UNIT (type
);
7717 TYPE_ALIGN (itype
) = TYPE_ALIGN (type
);
7718 TYPE_USER_ALIGN (itype
) = TYPE_USER_ALIGN (type
);
7723 if ((TYPE_MIN_VALUE (itype
)
7724 && TREE_CODE (TYPE_MIN_VALUE (itype
)) != INTEGER_CST
)
7725 || (TYPE_MAX_VALUE (itype
)
7726 && TREE_CODE (TYPE_MAX_VALUE (itype
)) != INTEGER_CST
))
7728 /* Since we cannot reliably merge this type, we need to compare it using
7729 structural equality checks. */
7730 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
7734 hashcode
= iterative_hash_expr (TYPE_MIN_VALUE (itype
), hashcode
);
7735 hashcode
= iterative_hash_expr (TYPE_MAX_VALUE (itype
), hashcode
);
7736 hashcode
= iterative_hash_hashval_t (TYPE_HASH (type
), hashcode
);
7737 itype
= type_hash_canon (hashcode
, itype
);
7742 /* Wrapper around build_range_type_1 with SHARED set to true. */
7745 build_range_type (tree type
, tree lowval
, tree highval
)
7747 return build_range_type_1 (type
, lowval
, highval
, true);
7750 /* Wrapper around build_range_type_1 with SHARED set to false. */
7753 build_nonshared_range_type (tree type
, tree lowval
, tree highval
)
7755 return build_range_type_1 (type
, lowval
, highval
, false);
7758 /* Create a type of integers to be the TYPE_DOMAIN of an ARRAY_TYPE.
7759 MAXVAL should be the maximum value in the domain
7760 (one less than the length of the array).
7762 The maximum value that MAXVAL can have is INT_MAX for a HOST_WIDE_INT.
7763 We don't enforce this limit, that is up to caller (e.g. language front end).
7764 The limit exists because the result is a signed type and we don't handle
7765 sizes that use more than one HOST_WIDE_INT. */
7768 build_index_type (tree maxval
)
7770 return build_range_type (sizetype
, size_zero_node
, maxval
);
7773 /* Return true if the debug information for TYPE, a subtype, should be emitted
7774 as a subrange type. If so, set LOWVAL to the low bound and HIGHVAL to the
7775 high bound, respectively. Sometimes doing so unnecessarily obfuscates the
7776 debug info and doesn't reflect the source code. */
7779 subrange_type_for_debug_p (const_tree type
, tree
*lowval
, tree
*highval
)
7781 tree base_type
= TREE_TYPE (type
), low
, high
;
7783 /* Subrange types have a base type which is an integral type. */
7784 if (!INTEGRAL_TYPE_P (base_type
))
7787 /* Get the real bounds of the subtype. */
7788 if (lang_hooks
.types
.get_subrange_bounds
)
7789 lang_hooks
.types
.get_subrange_bounds (type
, &low
, &high
);
7792 low
= TYPE_MIN_VALUE (type
);
7793 high
= TYPE_MAX_VALUE (type
);
7796 /* If the type and its base type have the same representation and the same
7797 name, then the type is not a subrange but a copy of the base type. */
7798 if ((TREE_CODE (base_type
) == INTEGER_TYPE
7799 || TREE_CODE (base_type
) == BOOLEAN_TYPE
)
7800 && int_size_in_bytes (type
) == int_size_in_bytes (base_type
)
7801 && tree_int_cst_equal (low
, TYPE_MIN_VALUE (base_type
))
7802 && tree_int_cst_equal (high
, TYPE_MAX_VALUE (base_type
)))
7804 tree type_name
= TYPE_NAME (type
);
7805 tree base_type_name
= TYPE_NAME (base_type
);
7807 if (type_name
&& TREE_CODE (type_name
) == TYPE_DECL
)
7808 type_name
= DECL_NAME (type_name
);
7810 if (base_type_name
&& TREE_CODE (base_type_name
) == TYPE_DECL
)
7811 base_type_name
= DECL_NAME (base_type_name
);
7813 if (type_name
== base_type_name
)
7824 /* Construct, lay out and return the type of arrays of elements with ELT_TYPE
7825 and number of elements specified by the range of values of INDEX_TYPE.
7826 If SHARED is true, reuse such a type that has already been constructed. */
7829 build_array_type_1 (tree elt_type
, tree index_type
, bool shared
)
7833 if (TREE_CODE (elt_type
) == FUNCTION_TYPE
)
7835 error ("arrays of functions are not meaningful");
7836 elt_type
= integer_type_node
;
7839 t
= make_node (ARRAY_TYPE
);
7840 TREE_TYPE (t
) = elt_type
;
7841 TYPE_DOMAIN (t
) = index_type
;
7842 TYPE_ADDR_SPACE (t
) = TYPE_ADDR_SPACE (elt_type
);
7845 /* If the element type is incomplete at this point we get marked for
7846 structural equality. Do not record these types in the canonical
7848 if (TYPE_STRUCTURAL_EQUALITY_P (t
))
7853 hashval_t hashcode
= iterative_hash_object (TYPE_HASH (elt_type
), 0);
7855 hashcode
= iterative_hash_object (TYPE_HASH (index_type
), hashcode
);
7856 t
= type_hash_canon (hashcode
, t
);
7859 if (TYPE_CANONICAL (t
) == t
)
7861 if (TYPE_STRUCTURAL_EQUALITY_P (elt_type
)
7862 || (index_type
&& TYPE_STRUCTURAL_EQUALITY_P (index_type
)))
7863 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7864 else if (TYPE_CANONICAL (elt_type
) != elt_type
7865 || (index_type
&& TYPE_CANONICAL (index_type
) != index_type
))
7867 = build_array_type_1 (TYPE_CANONICAL (elt_type
),
7869 ? TYPE_CANONICAL (index_type
) : NULL_TREE
,
7876 /* Wrapper around build_array_type_1 with SHARED set to true. */
7879 build_array_type (tree elt_type
, tree index_type
)
7881 return build_array_type_1 (elt_type
, index_type
, true);
7884 /* Wrapper around build_array_type_1 with SHARED set to false. */
7887 build_nonshared_array_type (tree elt_type
, tree index_type
)
7889 return build_array_type_1 (elt_type
, index_type
, false);
7892 /* Return a representation of ELT_TYPE[NELTS], using indices of type
7896 build_array_type_nelts (tree elt_type
, unsigned HOST_WIDE_INT nelts
)
7898 return build_array_type (elt_type
, build_index_type (size_int (nelts
- 1)));
7901 /* Recursively examines the array elements of TYPE, until a non-array
7902 element type is found. */
7905 strip_array_types (tree type
)
7907 while (TREE_CODE (type
) == ARRAY_TYPE
)
7908 type
= TREE_TYPE (type
);
7913 /* Computes the canonical argument types from the argument type list
7916 Upon return, *ANY_STRUCTURAL_P will be true iff either it was true
7917 on entry to this function, or if any of the ARGTYPES are
7920 Upon return, *ANY_NONCANONICAL_P will be true iff either it was
7921 true on entry to this function, or if any of the ARGTYPES are
7924 Returns a canonical argument list, which may be ARGTYPES when the
7925 canonical argument list is unneeded (i.e., *ANY_STRUCTURAL_P is
7926 true) or would not differ from ARGTYPES. */
7929 maybe_canonicalize_argtypes (tree argtypes
,
7930 bool *any_structural_p
,
7931 bool *any_noncanonical_p
)
7934 bool any_noncanonical_argtypes_p
= false;
7936 for (arg
= argtypes
; arg
&& !(*any_structural_p
); arg
= TREE_CHAIN (arg
))
7938 if (!TREE_VALUE (arg
) || TREE_VALUE (arg
) == error_mark_node
)
7939 /* Fail gracefully by stating that the type is structural. */
7940 *any_structural_p
= true;
7941 else if (TYPE_STRUCTURAL_EQUALITY_P (TREE_VALUE (arg
)))
7942 *any_structural_p
= true;
7943 else if (TYPE_CANONICAL (TREE_VALUE (arg
)) != TREE_VALUE (arg
)
7944 || TREE_PURPOSE (arg
))
7945 /* If the argument has a default argument, we consider it
7946 non-canonical even though the type itself is canonical.
7947 That way, different variants of function and method types
7948 with default arguments will all point to the variant with
7949 no defaults as their canonical type. */
7950 any_noncanonical_argtypes_p
= true;
7953 if (*any_structural_p
)
7956 if (any_noncanonical_argtypes_p
)
7958 /* Build the canonical list of argument types. */
7959 tree canon_argtypes
= NULL_TREE
;
7960 bool is_void
= false;
7962 for (arg
= argtypes
; arg
; arg
= TREE_CHAIN (arg
))
7964 if (arg
== void_list_node
)
7967 canon_argtypes
= tree_cons (NULL_TREE
,
7968 TYPE_CANONICAL (TREE_VALUE (arg
)),
7972 canon_argtypes
= nreverse (canon_argtypes
);
7974 canon_argtypes
= chainon (canon_argtypes
, void_list_node
);
7976 /* There is a non-canonical type. */
7977 *any_noncanonical_p
= true;
7978 return canon_argtypes
;
7981 /* The canonical argument types are the same as ARGTYPES. */
7985 /* Construct, lay out and return
7986 the type of functions returning type VALUE_TYPE
7987 given arguments of types ARG_TYPES.
7988 ARG_TYPES is a chain of TREE_LIST nodes whose TREE_VALUEs
7989 are data type nodes for the arguments of the function.
7990 If such a type has already been constructed, reuse it. */
7993 build_function_type (tree value_type
, tree arg_types
)
7996 hashval_t hashcode
= 0;
7997 bool any_structural_p
, any_noncanonical_p
;
7998 tree canon_argtypes
;
8000 if (TREE_CODE (value_type
) == FUNCTION_TYPE
)
8002 error ("function return type cannot be function");
8003 value_type
= integer_type_node
;
8006 /* Make a node of the sort we want. */
8007 t
= make_node (FUNCTION_TYPE
);
8008 TREE_TYPE (t
) = value_type
;
8009 TYPE_ARG_TYPES (t
) = arg_types
;
8011 /* If we already have such a type, use the old one. */
8012 hashcode
= iterative_hash_object (TYPE_HASH (value_type
), hashcode
);
8013 hashcode
= type_hash_list (arg_types
, hashcode
);
8014 t
= type_hash_canon (hashcode
, t
);
8016 /* Set up the canonical type. */
8017 any_structural_p
= TYPE_STRUCTURAL_EQUALITY_P (value_type
);
8018 any_noncanonical_p
= TYPE_CANONICAL (value_type
) != value_type
;
8019 canon_argtypes
= maybe_canonicalize_argtypes (arg_types
,
8021 &any_noncanonical_p
);
8022 if (any_structural_p
)
8023 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8024 else if (any_noncanonical_p
)
8025 TYPE_CANONICAL (t
) = build_function_type (TYPE_CANONICAL (value_type
),
8028 if (!COMPLETE_TYPE_P (t
))
8033 /* Build a function type. The RETURN_TYPE is the type returned by the
8034 function. If VAARGS is set, no void_type_node is appended to the
8035 the list. ARGP must be always be terminated be a NULL_TREE. */
8038 build_function_type_list_1 (bool vaargs
, tree return_type
, va_list argp
)
8042 t
= va_arg (argp
, tree
);
8043 for (args
= NULL_TREE
; t
!= NULL_TREE
; t
= va_arg (argp
, tree
))
8044 args
= tree_cons (NULL_TREE
, t
, args
);
8049 if (args
!= NULL_TREE
)
8050 args
= nreverse (args
);
8051 gcc_assert (last
!= void_list_node
);
8053 else if (args
== NULL_TREE
)
8054 args
= void_list_node
;
8058 args
= nreverse (args
);
8059 TREE_CHAIN (last
) = void_list_node
;
8061 args
= build_function_type (return_type
, args
);
8066 /* Build a function type. The RETURN_TYPE is the type returned by the
8067 function. If additional arguments are provided, they are
8068 additional argument types. The list of argument types must always
8069 be terminated by NULL_TREE. */
8072 build_function_type_list (tree return_type
, ...)
8077 va_start (p
, return_type
);
8078 args
= build_function_type_list_1 (false, return_type
, p
);
8083 /* Build a variable argument function type. The RETURN_TYPE is the
8084 type returned by the function. If additional arguments are provided,
8085 they are additional argument types. The list of argument types must
8086 always be terminated by NULL_TREE. */
8089 build_varargs_function_type_list (tree return_type
, ...)
8094 va_start (p
, return_type
);
8095 args
= build_function_type_list_1 (true, return_type
, p
);
8101 /* Build a function type. RETURN_TYPE is the type returned by the
8102 function; VAARGS indicates whether the function takes varargs. The
8103 function takes N named arguments, the types of which are provided in
8107 build_function_type_array_1 (bool vaargs
, tree return_type
, int n
,
8111 tree t
= vaargs
? NULL_TREE
: void_list_node
;
8113 for (i
= n
- 1; i
>= 0; i
--)
8114 t
= tree_cons (NULL_TREE
, arg_types
[i
], t
);
8116 return build_function_type (return_type
, t
);
8119 /* Build a function type. RETURN_TYPE is the type returned by the
8120 function. The function takes N named arguments, the types of which
8121 are provided in ARG_TYPES. */
8124 build_function_type_array (tree return_type
, int n
, tree
*arg_types
)
8126 return build_function_type_array_1 (false, return_type
, n
, arg_types
);
8129 /* Build a variable argument function type. RETURN_TYPE is the type
8130 returned by the function. The function takes N named arguments, the
8131 types of which are provided in ARG_TYPES. */
8134 build_varargs_function_type_array (tree return_type
, int n
, tree
*arg_types
)
8136 return build_function_type_array_1 (true, return_type
, n
, arg_types
);
8139 /* Build a METHOD_TYPE for a member of BASETYPE. The RETTYPE (a TYPE)
8140 and ARGTYPES (a TREE_LIST) are the return type and arguments types
8141 for the method. An implicit additional parameter (of type
8142 pointer-to-BASETYPE) is added to the ARGTYPES. */
8145 build_method_type_directly (tree basetype
,
8152 bool any_structural_p
, any_noncanonical_p
;
8153 tree canon_argtypes
;
8155 /* Make a node of the sort we want. */
8156 t
= make_node (METHOD_TYPE
);
8158 TYPE_METHOD_BASETYPE (t
) = TYPE_MAIN_VARIANT (basetype
);
8159 TREE_TYPE (t
) = rettype
;
8160 ptype
= build_pointer_type (basetype
);
8162 /* The actual arglist for this function includes a "hidden" argument
8163 which is "this". Put it into the list of argument types. */
8164 argtypes
= tree_cons (NULL_TREE
, ptype
, argtypes
);
8165 TYPE_ARG_TYPES (t
) = argtypes
;
8167 /* If we already have such a type, use the old one. */
8168 hashcode
= iterative_hash_object (TYPE_HASH (basetype
), hashcode
);
8169 hashcode
= iterative_hash_object (TYPE_HASH (rettype
), hashcode
);
8170 hashcode
= type_hash_list (argtypes
, hashcode
);
8171 t
= type_hash_canon (hashcode
, t
);
8173 /* Set up the canonical type. */
8175 = (TYPE_STRUCTURAL_EQUALITY_P (basetype
)
8176 || TYPE_STRUCTURAL_EQUALITY_P (rettype
));
8178 = (TYPE_CANONICAL (basetype
) != basetype
8179 || TYPE_CANONICAL (rettype
) != rettype
);
8180 canon_argtypes
= maybe_canonicalize_argtypes (TREE_CHAIN (argtypes
),
8182 &any_noncanonical_p
);
8183 if (any_structural_p
)
8184 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8185 else if (any_noncanonical_p
)
8187 = build_method_type_directly (TYPE_CANONICAL (basetype
),
8188 TYPE_CANONICAL (rettype
),
8190 if (!COMPLETE_TYPE_P (t
))
8196 /* Construct, lay out and return the type of methods belonging to class
8197 BASETYPE and whose arguments and values are described by TYPE.
8198 If that type exists already, reuse it.
8199 TYPE must be a FUNCTION_TYPE node. */
8202 build_method_type (tree basetype
, tree type
)
8204 gcc_assert (TREE_CODE (type
) == FUNCTION_TYPE
);
8206 return build_method_type_directly (basetype
,
8208 TYPE_ARG_TYPES (type
));
8211 /* Construct, lay out and return the type of offsets to a value
8212 of type TYPE, within an object of type BASETYPE.
8213 If a suitable offset type exists already, reuse it. */
8216 build_offset_type (tree basetype
, tree type
)
8219 hashval_t hashcode
= 0;
8221 /* Make a node of the sort we want. */
8222 t
= make_node (OFFSET_TYPE
);
8224 TYPE_OFFSET_BASETYPE (t
) = TYPE_MAIN_VARIANT (basetype
);
8225 TREE_TYPE (t
) = type
;
8227 /* If we already have such a type, use the old one. */
8228 hashcode
= iterative_hash_object (TYPE_HASH (basetype
), hashcode
);
8229 hashcode
= iterative_hash_object (TYPE_HASH (type
), hashcode
);
8230 t
= type_hash_canon (hashcode
, t
);
8232 if (!COMPLETE_TYPE_P (t
))
8235 if (TYPE_CANONICAL (t
) == t
)
8237 if (TYPE_STRUCTURAL_EQUALITY_P (basetype
)
8238 || TYPE_STRUCTURAL_EQUALITY_P (type
))
8239 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8240 else if (TYPE_CANONICAL (TYPE_MAIN_VARIANT (basetype
)) != basetype
8241 || TYPE_CANONICAL (type
) != type
)
8243 = build_offset_type (TYPE_CANONICAL (TYPE_MAIN_VARIANT (basetype
)),
8244 TYPE_CANONICAL (type
));
8250 /* Create a complex type whose components are COMPONENT_TYPE. */
8253 build_complex_type (tree component_type
)
8258 gcc_assert (INTEGRAL_TYPE_P (component_type
)
8259 || SCALAR_FLOAT_TYPE_P (component_type
)
8260 || FIXED_POINT_TYPE_P (component_type
));
8262 /* Make a node of the sort we want. */
8263 t
= make_node (COMPLEX_TYPE
);
8265 TREE_TYPE (t
) = TYPE_MAIN_VARIANT (component_type
);
8267 /* If we already have such a type, use the old one. */
8268 hashcode
= iterative_hash_object (TYPE_HASH (component_type
), 0);
8269 t
= type_hash_canon (hashcode
, t
);
8271 if (!COMPLETE_TYPE_P (t
))
8274 if (TYPE_CANONICAL (t
) == t
)
8276 if (TYPE_STRUCTURAL_EQUALITY_P (component_type
))
8277 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8278 else if (TYPE_CANONICAL (component_type
) != component_type
)
8280 = build_complex_type (TYPE_CANONICAL (component_type
));
8283 /* We need to create a name, since complex is a fundamental type. */
8284 if (! TYPE_NAME (t
))
8287 if (component_type
== char_type_node
)
8288 name
= "complex char";
8289 else if (component_type
== signed_char_type_node
)
8290 name
= "complex signed char";
8291 else if (component_type
== unsigned_char_type_node
)
8292 name
= "complex unsigned char";
8293 else if (component_type
== short_integer_type_node
)
8294 name
= "complex short int";
8295 else if (component_type
== short_unsigned_type_node
)
8296 name
= "complex short unsigned int";
8297 else if (component_type
== integer_type_node
)
8298 name
= "complex int";
8299 else if (component_type
== unsigned_type_node
)
8300 name
= "complex unsigned int";
8301 else if (component_type
== long_integer_type_node
)
8302 name
= "complex long int";
8303 else if (component_type
== long_unsigned_type_node
)
8304 name
= "complex long unsigned int";
8305 else if (component_type
== long_long_integer_type_node
)
8306 name
= "complex long long int";
8307 else if (component_type
== long_long_unsigned_type_node
)
8308 name
= "complex long long unsigned int";
8313 TYPE_NAME (t
) = build_decl (UNKNOWN_LOCATION
, TYPE_DECL
,
8314 get_identifier (name
), t
);
8317 return build_qualified_type (t
, TYPE_QUALS (component_type
));
8320 /* If TYPE is a real or complex floating-point type and the target
8321 does not directly support arithmetic on TYPE then return the wider
8322 type to be used for arithmetic on TYPE. Otherwise, return
8326 excess_precision_type (tree type
)
8328 if (flag_excess_precision
!= EXCESS_PRECISION_FAST
)
8330 int flt_eval_method
= TARGET_FLT_EVAL_METHOD
;
8331 switch (TREE_CODE (type
))
8334 switch (flt_eval_method
)
8337 if (TYPE_MODE (type
) == TYPE_MODE (float_type_node
))
8338 return double_type_node
;
8341 if (TYPE_MODE (type
) == TYPE_MODE (float_type_node
)
8342 || TYPE_MODE (type
) == TYPE_MODE (double_type_node
))
8343 return long_double_type_node
;
8350 if (TREE_CODE (TREE_TYPE (type
)) != REAL_TYPE
)
8352 switch (flt_eval_method
)
8355 if (TYPE_MODE (TREE_TYPE (type
)) == TYPE_MODE (float_type_node
))
8356 return complex_double_type_node
;
8359 if (TYPE_MODE (TREE_TYPE (type
)) == TYPE_MODE (float_type_node
)
8360 || (TYPE_MODE (TREE_TYPE (type
))
8361 == TYPE_MODE (double_type_node
)))
8362 return complex_long_double_type_node
;
8375 /* Return OP, stripped of any conversions to wider types as much as is safe.
8376 Converting the value back to OP's type makes a value equivalent to OP.
8378 If FOR_TYPE is nonzero, we return a value which, if converted to
8379 type FOR_TYPE, would be equivalent to converting OP to type FOR_TYPE.
8381 OP must have integer, real or enumeral type. Pointers are not allowed!
8383 There are some cases where the obvious value we could return
8384 would regenerate to OP if converted to OP's type,
8385 but would not extend like OP to wider types.
8386 If FOR_TYPE indicates such extension is contemplated, we eschew such values.
8387 For example, if OP is (unsigned short)(signed char)-1,
8388 we avoid returning (signed char)-1 if FOR_TYPE is int,
8389 even though extending that to an unsigned short would regenerate OP,
8390 since the result of extending (signed char)-1 to (int)
8391 is different from (int) OP. */
8394 get_unwidened (tree op
, tree for_type
)
8396 /* Set UNS initially if converting OP to FOR_TYPE is a zero-extension. */
8397 tree type
= TREE_TYPE (op
);
8399 = TYPE_PRECISION (for_type
!= 0 ? for_type
: type
);
8401 = (for_type
!= 0 && for_type
!= type
8402 && final_prec
> TYPE_PRECISION (type
)
8403 && TYPE_UNSIGNED (type
));
8406 while (CONVERT_EXPR_P (op
))
8410 /* TYPE_PRECISION on vector types has different meaning
8411 (TYPE_VECTOR_SUBPARTS) and casts from vectors are view conversions,
8412 so avoid them here. */
8413 if (TREE_CODE (TREE_TYPE (TREE_OPERAND (op
, 0))) == VECTOR_TYPE
)
8416 bitschange
= TYPE_PRECISION (TREE_TYPE (op
))
8417 - TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (op
, 0)));
8419 /* Truncations are many-one so cannot be removed.
8420 Unless we are later going to truncate down even farther. */
8422 && final_prec
> TYPE_PRECISION (TREE_TYPE (op
)))
8425 /* See what's inside this conversion. If we decide to strip it,
8427 op
= TREE_OPERAND (op
, 0);
8429 /* If we have not stripped any zero-extensions (uns is 0),
8430 we can strip any kind of extension.
8431 If we have previously stripped a zero-extension,
8432 only zero-extensions can safely be stripped.
8433 Any extension can be stripped if the bits it would produce
8434 are all going to be discarded later by truncating to FOR_TYPE. */
8438 if (! uns
|| final_prec
<= TYPE_PRECISION (TREE_TYPE (op
)))
8440 /* TYPE_UNSIGNED says whether this is a zero-extension.
8441 Let's avoid computing it if it does not affect WIN
8442 and if UNS will not be needed again. */
8444 || CONVERT_EXPR_P (op
))
8445 && TYPE_UNSIGNED (TREE_TYPE (op
)))
8453 /* If we finally reach a constant see if it fits in for_type and
8454 in that case convert it. */
8456 && TREE_CODE (win
) == INTEGER_CST
8457 && TREE_TYPE (win
) != for_type
8458 && int_fits_type_p (win
, for_type
))
8459 win
= fold_convert (for_type
, win
);
8464 /* Return OP or a simpler expression for a narrower value
8465 which can be sign-extended or zero-extended to give back OP.
8466 Store in *UNSIGNEDP_PTR either 1 if the value should be zero-extended
8467 or 0 if the value should be sign-extended. */
8470 get_narrower (tree op
, int *unsignedp_ptr
)
8475 bool integral_p
= INTEGRAL_TYPE_P (TREE_TYPE (op
));
8477 while (TREE_CODE (op
) == NOP_EXPR
)
8480 = (TYPE_PRECISION (TREE_TYPE (op
))
8481 - TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (op
, 0))));
8483 /* Truncations are many-one so cannot be removed. */
8487 /* See what's inside this conversion. If we decide to strip it,
8492 op
= TREE_OPERAND (op
, 0);
8493 /* An extension: the outermost one can be stripped,
8494 but remember whether it is zero or sign extension. */
8496 uns
= TYPE_UNSIGNED (TREE_TYPE (op
));
8497 /* Otherwise, if a sign extension has been stripped,
8498 only sign extensions can now be stripped;
8499 if a zero extension has been stripped, only zero-extensions. */
8500 else if (uns
!= TYPE_UNSIGNED (TREE_TYPE (op
)))
8504 else /* bitschange == 0 */
8506 /* A change in nominal type can always be stripped, but we must
8507 preserve the unsignedness. */
8509 uns
= TYPE_UNSIGNED (TREE_TYPE (op
));
8511 op
= TREE_OPERAND (op
, 0);
8512 /* Keep trying to narrow, but don't assign op to win if it
8513 would turn an integral type into something else. */
8514 if (INTEGRAL_TYPE_P (TREE_TYPE (op
)) != integral_p
)
8521 if (TREE_CODE (op
) == COMPONENT_REF
8522 /* Since type_for_size always gives an integer type. */
8523 && TREE_CODE (TREE_TYPE (op
)) != REAL_TYPE
8524 && TREE_CODE (TREE_TYPE (op
)) != FIXED_POINT_TYPE
8525 /* Ensure field is laid out already. */
8526 && DECL_SIZE (TREE_OPERAND (op
, 1)) != 0
8527 && tree_fits_uhwi_p (DECL_SIZE (TREE_OPERAND (op
, 1))))
8529 unsigned HOST_WIDE_INT innerprec
8530 = tree_to_uhwi (DECL_SIZE (TREE_OPERAND (op
, 1)));
8531 int unsignedp
= (DECL_UNSIGNED (TREE_OPERAND (op
, 1))
8532 || TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (op
, 1))));
8533 tree type
= lang_hooks
.types
.type_for_size (innerprec
, unsignedp
);
8535 /* We can get this structure field in a narrower type that fits it,
8536 but the resulting extension to its nominal type (a fullword type)
8537 must satisfy the same conditions as for other extensions.
8539 Do this only for fields that are aligned (not bit-fields),
8540 because when bit-field insns will be used there is no
8541 advantage in doing this. */
8543 if (innerprec
< TYPE_PRECISION (TREE_TYPE (op
))
8544 && ! DECL_BIT_FIELD (TREE_OPERAND (op
, 1))
8545 && (first
|| uns
== DECL_UNSIGNED (TREE_OPERAND (op
, 1)))
8549 uns
= DECL_UNSIGNED (TREE_OPERAND (op
, 1));
8550 win
= fold_convert (type
, op
);
8554 *unsignedp_ptr
= uns
;
8558 /* Returns true if integer constant C has a value that is permissible
8559 for type TYPE (an INTEGER_TYPE). */
8562 int_fits_type_p (const_tree c
, const_tree type
)
8564 tree type_low_bound
, type_high_bound
;
8565 bool ok_for_low_bound
, ok_for_high_bound
, unsc
;
8568 dc
= tree_to_double_int (c
);
8569 unsc
= TYPE_UNSIGNED (TREE_TYPE (c
));
8572 type_low_bound
= TYPE_MIN_VALUE (type
);
8573 type_high_bound
= TYPE_MAX_VALUE (type
);
8575 /* If at least one bound of the type is a constant integer, we can check
8576 ourselves and maybe make a decision. If no such decision is possible, but
8577 this type is a subtype, try checking against that. Otherwise, use
8578 double_int_fits_to_tree_p, which checks against the precision.
8580 Compute the status for each possibly constant bound, and return if we see
8581 one does not match. Use ok_for_xxx_bound for this purpose, assigning -1
8582 for "unknown if constant fits", 0 for "constant known *not* to fit" and 1
8583 for "constant known to fit". */
8585 /* Check if c >= type_low_bound. */
8586 if (type_low_bound
&& TREE_CODE (type_low_bound
) == INTEGER_CST
)
8588 dd
= tree_to_double_int (type_low_bound
);
8589 if (unsc
!= TYPE_UNSIGNED (TREE_TYPE (type_low_bound
)))
8591 int c_neg
= (!unsc
&& dc
.is_negative ());
8592 int t_neg
= (unsc
&& dd
.is_negative ());
8594 if (c_neg
&& !t_neg
)
8596 if ((c_neg
|| !t_neg
) && dc
.ult (dd
))
8599 else if (dc
.cmp (dd
, unsc
) < 0)
8601 ok_for_low_bound
= true;
8604 ok_for_low_bound
= false;
8606 /* Check if c <= type_high_bound. */
8607 if (type_high_bound
&& TREE_CODE (type_high_bound
) == INTEGER_CST
)
8609 dd
= tree_to_double_int (type_high_bound
);
8610 if (unsc
!= TYPE_UNSIGNED (TREE_TYPE (type_high_bound
)))
8612 int c_neg
= (!unsc
&& dc
.is_negative ());
8613 int t_neg
= (unsc
&& dd
.is_negative ());
8615 if (t_neg
&& !c_neg
)
8617 if ((t_neg
|| !c_neg
) && dc
.ugt (dd
))
8620 else if (dc
.cmp (dd
, unsc
) > 0)
8622 ok_for_high_bound
= true;
8625 ok_for_high_bound
= false;
8627 /* If the constant fits both bounds, the result is known. */
8628 if (ok_for_low_bound
&& ok_for_high_bound
)
8631 /* Perform some generic filtering which may allow making a decision
8632 even if the bounds are not constant. First, negative integers
8633 never fit in unsigned types, */
8634 if (TYPE_UNSIGNED (type
) && !unsc
&& dc
.is_negative ())
8637 /* Second, narrower types always fit in wider ones. */
8638 if (TYPE_PRECISION (type
) > TYPE_PRECISION (TREE_TYPE (c
)))
8641 /* Third, unsigned integers with top bit set never fit signed types. */
8642 if (! TYPE_UNSIGNED (type
) && unsc
)
8644 int prec
= GET_MODE_PRECISION (TYPE_MODE (TREE_TYPE (c
))) - 1;
8645 if (prec
< HOST_BITS_PER_WIDE_INT
)
8647 if (((((unsigned HOST_WIDE_INT
) 1) << prec
) & dc
.low
) != 0)
8650 else if (((((unsigned HOST_WIDE_INT
) 1)
8651 << (prec
- HOST_BITS_PER_WIDE_INT
)) & dc
.high
) != 0)
8655 /* If we haven't been able to decide at this point, there nothing more we
8656 can check ourselves here. Look at the base type if we have one and it
8657 has the same precision. */
8658 if (TREE_CODE (type
) == INTEGER_TYPE
8659 && TREE_TYPE (type
) != 0
8660 && TYPE_PRECISION (type
) == TYPE_PRECISION (TREE_TYPE (type
)))
8662 type
= TREE_TYPE (type
);
8666 /* Or to double_int_fits_to_tree_p, if nothing else. */
8667 return double_int_fits_to_tree_p (type
, dc
);
8670 /* Stores bounds of an integer TYPE in MIN and MAX. If TYPE has non-constant
8671 bounds or is a POINTER_TYPE, the maximum and/or minimum values that can be
8672 represented (assuming two's-complement arithmetic) within the bit
8673 precision of the type are returned instead. */
8676 get_type_static_bounds (const_tree type
, mpz_t min
, mpz_t max
)
8678 if (!POINTER_TYPE_P (type
) && TYPE_MIN_VALUE (type
)
8679 && TREE_CODE (TYPE_MIN_VALUE (type
)) == INTEGER_CST
)
8680 mpz_set_double_int (min
, tree_to_double_int (TYPE_MIN_VALUE (type
)),
8681 TYPE_UNSIGNED (type
));
8684 if (TYPE_UNSIGNED (type
))
8685 mpz_set_ui (min
, 0);
8689 mn
= double_int::mask (TYPE_PRECISION (type
) - 1);
8690 mn
= (mn
+ double_int_one
).sext (TYPE_PRECISION (type
));
8691 mpz_set_double_int (min
, mn
, false);
8695 if (!POINTER_TYPE_P (type
) && TYPE_MAX_VALUE (type
)
8696 && TREE_CODE (TYPE_MAX_VALUE (type
)) == INTEGER_CST
)
8697 mpz_set_double_int (max
, tree_to_double_int (TYPE_MAX_VALUE (type
)),
8698 TYPE_UNSIGNED (type
));
8701 if (TYPE_UNSIGNED (type
))
8702 mpz_set_double_int (max
, double_int::mask (TYPE_PRECISION (type
)),
8705 mpz_set_double_int (max
, double_int::mask (TYPE_PRECISION (type
) - 1),
8710 /* Return true if VAR is an automatic variable defined in function FN. */
8713 auto_var_in_fn_p (const_tree var
, const_tree fn
)
8715 return (DECL_P (var
) && DECL_CONTEXT (var
) == fn
8716 && ((((TREE_CODE (var
) == VAR_DECL
&& ! DECL_EXTERNAL (var
))
8717 || TREE_CODE (var
) == PARM_DECL
)
8718 && ! TREE_STATIC (var
))
8719 || TREE_CODE (var
) == LABEL_DECL
8720 || TREE_CODE (var
) == RESULT_DECL
));
8723 /* Subprogram of following function. Called by walk_tree.
8725 Return *TP if it is an automatic variable or parameter of the
8726 function passed in as DATA. */
8729 find_var_from_fn (tree
*tp
, int *walk_subtrees
, void *data
)
8731 tree fn
= (tree
) data
;
8736 else if (DECL_P (*tp
)
8737 && auto_var_in_fn_p (*tp
, fn
))
8743 /* Returns true if T is, contains, or refers to a type with variable
8744 size. For METHOD_TYPEs and FUNCTION_TYPEs we exclude the
8745 arguments, but not the return type. If FN is nonzero, only return
8746 true if a modifier of the type or position of FN is a variable or
8747 parameter inside FN.
8749 This concept is more general than that of C99 'variably modified types':
8750 in C99, a struct type is never variably modified because a VLA may not
8751 appear as a structure member. However, in GNU C code like:
8753 struct S { int i[f()]; };
8755 is valid, and other languages may define similar constructs. */
8758 variably_modified_type_p (tree type
, tree fn
)
8762 /* Test if T is either variable (if FN is zero) or an expression containing
8763 a variable in FN. If TYPE isn't gimplified, return true also if
8764 gimplify_one_sizepos would gimplify the expression into a local
8766 #define RETURN_TRUE_IF_VAR(T) \
8767 do { tree _t = (T); \
8768 if (_t != NULL_TREE \
8769 && _t != error_mark_node \
8770 && TREE_CODE (_t) != INTEGER_CST \
8771 && TREE_CODE (_t) != PLACEHOLDER_EXPR \
8773 || (!TYPE_SIZES_GIMPLIFIED (type) \
8774 && !is_gimple_sizepos (_t)) \
8775 || walk_tree (&_t, find_var_from_fn, fn, NULL))) \
8776 return true; } while (0)
8778 if (type
== error_mark_node
)
8781 /* If TYPE itself has variable size, it is variably modified. */
8782 RETURN_TRUE_IF_VAR (TYPE_SIZE (type
));
8783 RETURN_TRUE_IF_VAR (TYPE_SIZE_UNIT (type
));
8785 switch (TREE_CODE (type
))
8788 case REFERENCE_TYPE
:
8790 if (variably_modified_type_p (TREE_TYPE (type
), fn
))
8796 /* If TYPE is a function type, it is variably modified if the
8797 return type is variably modified. */
8798 if (variably_modified_type_p (TREE_TYPE (type
), fn
))
8804 case FIXED_POINT_TYPE
:
8807 /* Scalar types are variably modified if their end points
8809 RETURN_TRUE_IF_VAR (TYPE_MIN_VALUE (type
));
8810 RETURN_TRUE_IF_VAR (TYPE_MAX_VALUE (type
));
8815 case QUAL_UNION_TYPE
:
8816 /* We can't see if any of the fields are variably-modified by the
8817 definition we normally use, since that would produce infinite
8818 recursion via pointers. */
8819 /* This is variably modified if some field's type is. */
8820 for (t
= TYPE_FIELDS (type
); t
; t
= DECL_CHAIN (t
))
8821 if (TREE_CODE (t
) == FIELD_DECL
)
8823 RETURN_TRUE_IF_VAR (DECL_FIELD_OFFSET (t
));
8824 RETURN_TRUE_IF_VAR (DECL_SIZE (t
));
8825 RETURN_TRUE_IF_VAR (DECL_SIZE_UNIT (t
));
8827 if (TREE_CODE (type
) == QUAL_UNION_TYPE
)
8828 RETURN_TRUE_IF_VAR (DECL_QUALIFIER (t
));
8833 /* Do not call ourselves to avoid infinite recursion. This is
8834 variably modified if the element type is. */
8835 RETURN_TRUE_IF_VAR (TYPE_SIZE (TREE_TYPE (type
)));
8836 RETURN_TRUE_IF_VAR (TYPE_SIZE_UNIT (TREE_TYPE (type
)));
8843 /* The current language may have other cases to check, but in general,
8844 all other types are not variably modified. */
8845 return lang_hooks
.tree_inlining
.var_mod_type_p (type
, fn
);
8847 #undef RETURN_TRUE_IF_VAR
8850 /* Given a DECL or TYPE, return the scope in which it was declared, or
8851 NULL_TREE if there is no containing scope. */
8854 get_containing_scope (const_tree t
)
8856 return (TYPE_P (t
) ? TYPE_CONTEXT (t
) : DECL_CONTEXT (t
));
8859 /* Return the innermost context enclosing DECL that is
8860 a FUNCTION_DECL, or zero if none. */
8863 decl_function_context (const_tree decl
)
8867 if (TREE_CODE (decl
) == ERROR_MARK
)
8870 /* C++ virtual functions use DECL_CONTEXT for the class of the vtable
8871 where we look up the function at runtime. Such functions always take
8872 a first argument of type 'pointer to real context'.
8874 C++ should really be fixed to use DECL_CONTEXT for the real context,
8875 and use something else for the "virtual context". */
8876 else if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_VINDEX (decl
))
8879 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl
)))));
8881 context
= DECL_CONTEXT (decl
);
8883 while (context
&& TREE_CODE (context
) != FUNCTION_DECL
)
8885 if (TREE_CODE (context
) == BLOCK
)
8886 context
= BLOCK_SUPERCONTEXT (context
);
8888 context
= get_containing_scope (context
);
8894 /* Return the innermost context enclosing DECL that is
8895 a RECORD_TYPE, UNION_TYPE or QUAL_UNION_TYPE, or zero if none.
8896 TYPE_DECLs and FUNCTION_DECLs are transparent to this function. */
8899 decl_type_context (const_tree decl
)
8901 tree context
= DECL_CONTEXT (decl
);
8904 switch (TREE_CODE (context
))
8906 case NAMESPACE_DECL
:
8907 case TRANSLATION_UNIT_DECL
:
8912 case QUAL_UNION_TYPE
:
8917 context
= DECL_CONTEXT (context
);
8921 context
= BLOCK_SUPERCONTEXT (context
);
8931 /* CALL is a CALL_EXPR. Return the declaration for the function
8932 called, or NULL_TREE if the called function cannot be
8936 get_callee_fndecl (const_tree call
)
8940 if (call
== error_mark_node
)
8941 return error_mark_node
;
8943 /* It's invalid to call this function with anything but a
8945 gcc_assert (TREE_CODE (call
) == CALL_EXPR
);
8947 /* The first operand to the CALL is the address of the function
8949 addr
= CALL_EXPR_FN (call
);
8953 /* If this is a readonly function pointer, extract its initial value. */
8954 if (DECL_P (addr
) && TREE_CODE (addr
) != FUNCTION_DECL
8955 && TREE_READONLY (addr
) && ! TREE_THIS_VOLATILE (addr
)
8956 && DECL_INITIAL (addr
))
8957 addr
= DECL_INITIAL (addr
);
8959 /* If the address is just `&f' for some function `f', then we know
8960 that `f' is being called. */
8961 if (TREE_CODE (addr
) == ADDR_EXPR
8962 && TREE_CODE (TREE_OPERAND (addr
, 0)) == FUNCTION_DECL
)
8963 return TREE_OPERAND (addr
, 0);
8965 /* We couldn't figure out what was being called. */
8969 /* Print debugging information about tree nodes generated during the compile,
8970 and any language-specific information. */
8973 dump_tree_statistics (void)
8975 if (GATHER_STATISTICS
)
8978 int total_nodes
, total_bytes
;
8979 fprintf (stderr
, "Kind Nodes Bytes\n");
8980 fprintf (stderr
, "---------------------------------------\n");
8981 total_nodes
= total_bytes
= 0;
8982 for (i
= 0; i
< (int) all_kinds
; i
++)
8984 fprintf (stderr
, "%-20s %7d %10d\n", tree_node_kind_names
[i
],
8985 tree_node_counts
[i
], tree_node_sizes
[i
]);
8986 total_nodes
+= tree_node_counts
[i
];
8987 total_bytes
+= tree_node_sizes
[i
];
8989 fprintf (stderr
, "---------------------------------------\n");
8990 fprintf (stderr
, "%-20s %7d %10d\n", "Total", total_nodes
, total_bytes
);
8991 fprintf (stderr
, "---------------------------------------\n");
8992 fprintf (stderr
, "Code Nodes\n");
8993 fprintf (stderr
, "----------------------------\n");
8994 for (i
= 0; i
< (int) MAX_TREE_CODES
; i
++)
8995 fprintf (stderr
, "%-20s %7d\n", get_tree_code_name ((enum tree_code
) i
),
8996 tree_code_counts
[i
]);
8997 fprintf (stderr
, "----------------------------\n");
8998 ssanames_print_statistics ();
8999 phinodes_print_statistics ();
9002 fprintf (stderr
, "(No per-node statistics)\n");
9004 print_type_hash_statistics ();
9005 print_debug_expr_statistics ();
9006 print_value_expr_statistics ();
9007 lang_hooks
.print_statistics ();
9010 #define FILE_FUNCTION_FORMAT "_GLOBAL__%s_%s"
9012 /* Generate a crc32 of a byte. */
9015 crc32_unsigned_bits (unsigned chksum
, unsigned value
, unsigned bits
)
9019 for (ix
= bits
; ix
--; value
<<= 1)
9023 feedback
= (value
^ chksum
) & 0x80000000 ? 0x04c11db7 : 0;
9030 /* Generate a crc32 of a 32-bit unsigned. */
9033 crc32_unsigned (unsigned chksum
, unsigned value
)
9035 return crc32_unsigned_bits (chksum
, value
, 32);
9038 /* Generate a crc32 of a byte. */
9041 crc32_byte (unsigned chksum
, char byte
)
9043 return crc32_unsigned_bits (chksum
, (unsigned) byte
<< 24, 8);
9046 /* Generate a crc32 of a string. */
9049 crc32_string (unsigned chksum
, const char *string
)
9053 chksum
= crc32_byte (chksum
, *string
);
9059 /* P is a string that will be used in a symbol. Mask out any characters
9060 that are not valid in that context. */
9063 clean_symbol_name (char *p
)
9067 #ifndef NO_DOLLAR_IN_LABEL /* this for `$'; unlikely, but... -- kr */
9070 #ifndef NO_DOT_IN_LABEL /* this for `.'; unlikely, but... */
9077 /* Generate a name for a special-purpose function.
9078 The generated name may need to be unique across the whole link.
9079 Changes to this function may also require corresponding changes to
9080 xstrdup_mask_random.
9081 TYPE is some string to identify the purpose of this function to the
9082 linker or collect2; it must start with an uppercase letter,
9084 I - for constructors
9086 N - for C++ anonymous namespaces
9087 F - for DWARF unwind frame information. */
9090 get_file_function_name (const char *type
)
9096 /* If we already have a name we know to be unique, just use that. */
9097 if (first_global_object_name
)
9098 p
= q
= ASTRDUP (first_global_object_name
);
9099 /* If the target is handling the constructors/destructors, they
9100 will be local to this file and the name is only necessary for
9102 We also assign sub_I and sub_D sufixes to constructors called from
9103 the global static constructors. These are always local. */
9104 else if (((type
[0] == 'I' || type
[0] == 'D') && targetm
.have_ctors_dtors
)
9105 || (strncmp (type
, "sub_", 4) == 0
9106 && (type
[4] == 'I' || type
[4] == 'D')))
9108 const char *file
= main_input_filename
;
9110 file
= LOCATION_FILE (input_location
);
9111 /* Just use the file's basename, because the full pathname
9112 might be quite long. */
9113 p
= q
= ASTRDUP (lbasename (file
));
9117 /* Otherwise, the name must be unique across the entire link.
9118 We don't have anything that we know to be unique to this translation
9119 unit, so use what we do have and throw in some randomness. */
9121 const char *name
= weak_global_object_name
;
9122 const char *file
= main_input_filename
;
9127 file
= LOCATION_FILE (input_location
);
9129 len
= strlen (file
);
9130 q
= (char *) alloca (9 + 17 + len
+ 1);
9131 memcpy (q
, file
, len
+ 1);
9133 snprintf (q
+ len
, 9 + 17 + 1, "_%08X_" HOST_WIDE_INT_PRINT_HEX
,
9134 crc32_string (0, name
), get_random_seed (false));
9139 clean_symbol_name (q
);
9140 buf
= (char *) alloca (sizeof (FILE_FUNCTION_FORMAT
) + strlen (p
)
9143 /* Set up the name of the file-level functions we may need.
9144 Use a global object (which is already required to be unique over
9145 the program) rather than the file name (which imposes extra
9147 sprintf (buf
, FILE_FUNCTION_FORMAT
, type
, p
);
9149 return get_identifier (buf
);
9152 #if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007)
9154 /* Complain that the tree code of NODE does not match the expected 0
9155 terminated list of trailing codes. The trailing code list can be
9156 empty, for a more vague error message. FILE, LINE, and FUNCTION
9157 are of the caller. */
9160 tree_check_failed (const_tree node
, const char *file
,
9161 int line
, const char *function
, ...)
9165 unsigned length
= 0;
9166 enum tree_code code
;
9168 va_start (args
, function
);
9169 while ((code
= (enum tree_code
) va_arg (args
, int)))
9170 length
+= 4 + strlen (get_tree_code_name (code
));
9175 va_start (args
, function
);
9176 length
+= strlen ("expected ");
9177 buffer
= tmp
= (char *) alloca (length
);
9179 while ((code
= (enum tree_code
) va_arg (args
, int)))
9181 const char *prefix
= length
? " or " : "expected ";
9183 strcpy (tmp
+ length
, prefix
);
9184 length
+= strlen (prefix
);
9185 strcpy (tmp
+ length
, get_tree_code_name (code
));
9186 length
+= strlen (get_tree_code_name (code
));
9191 buffer
= "unexpected node";
9193 internal_error ("tree check: %s, have %s in %s, at %s:%d",
9194 buffer
, get_tree_code_name (TREE_CODE (node
)),
9195 function
, trim_filename (file
), line
);
9198 /* Complain that the tree code of NODE does match the expected 0
9199 terminated list of trailing codes. FILE, LINE, and FUNCTION are of
9203 tree_not_check_failed (const_tree node
, const char *file
,
9204 int line
, const char *function
, ...)
9208 unsigned length
= 0;
9209 enum tree_code code
;
9211 va_start (args
, function
);
9212 while ((code
= (enum tree_code
) va_arg (args
, int)))
9213 length
+= 4 + strlen (get_tree_code_name (code
));
9215 va_start (args
, function
);
9216 buffer
= (char *) alloca (length
);
9218 while ((code
= (enum tree_code
) va_arg (args
, int)))
9222 strcpy (buffer
+ length
, " or ");
9225 strcpy (buffer
+ length
, get_tree_code_name (code
));
9226 length
+= strlen (get_tree_code_name (code
));
9230 internal_error ("tree check: expected none of %s, have %s in %s, at %s:%d",
9231 buffer
, get_tree_code_name (TREE_CODE (node
)),
9232 function
, trim_filename (file
), line
);
9235 /* Similar to tree_check_failed, except that we check for a class of tree
9236 code, given in CL. */
9239 tree_class_check_failed (const_tree node
, const enum tree_code_class cl
,
9240 const char *file
, int line
, const char *function
)
9243 ("tree check: expected class %qs, have %qs (%s) in %s, at %s:%d",
9244 TREE_CODE_CLASS_STRING (cl
),
9245 TREE_CODE_CLASS_STRING (TREE_CODE_CLASS (TREE_CODE (node
))),
9246 get_tree_code_name (TREE_CODE (node
)), function
, trim_filename (file
), line
);
9249 /* Similar to tree_check_failed, except that instead of specifying a
9250 dozen codes, use the knowledge that they're all sequential. */
9253 tree_range_check_failed (const_tree node
, const char *file
, int line
,
9254 const char *function
, enum tree_code c1
,
9258 unsigned length
= 0;
9261 for (c
= c1
; c
<= c2
; ++c
)
9262 length
+= 4 + strlen (get_tree_code_name ((enum tree_code
) c
));
9264 length
+= strlen ("expected ");
9265 buffer
= (char *) alloca (length
);
9268 for (c
= c1
; c
<= c2
; ++c
)
9270 const char *prefix
= length
? " or " : "expected ";
9272 strcpy (buffer
+ length
, prefix
);
9273 length
+= strlen (prefix
);
9274 strcpy (buffer
+ length
, get_tree_code_name ((enum tree_code
) c
));
9275 length
+= strlen (get_tree_code_name ((enum tree_code
) c
));
9278 internal_error ("tree check: %s, have %s in %s, at %s:%d",
9279 buffer
, get_tree_code_name (TREE_CODE (node
)),
9280 function
, trim_filename (file
), line
);
9284 /* Similar to tree_check_failed, except that we check that a tree does
9285 not have the specified code, given in CL. */
9288 tree_not_class_check_failed (const_tree node
, const enum tree_code_class cl
,
9289 const char *file
, int line
, const char *function
)
9292 ("tree check: did not expect class %qs, have %qs (%s) in %s, at %s:%d",
9293 TREE_CODE_CLASS_STRING (cl
),
9294 TREE_CODE_CLASS_STRING (TREE_CODE_CLASS (TREE_CODE (node
))),
9295 get_tree_code_name (TREE_CODE (node
)), function
, trim_filename (file
), line
);
9299 /* Similar to tree_check_failed but applied to OMP_CLAUSE codes. */
9302 omp_clause_check_failed (const_tree node
, const char *file
, int line
,
9303 const char *function
, enum omp_clause_code code
)
9305 internal_error ("tree check: expected omp_clause %s, have %s in %s, at %s:%d",
9306 omp_clause_code_name
[code
], get_tree_code_name (TREE_CODE (node
)),
9307 function
, trim_filename (file
), line
);
9311 /* Similar to tree_range_check_failed but applied to OMP_CLAUSE codes. */
9314 omp_clause_range_check_failed (const_tree node
, const char *file
, int line
,
9315 const char *function
, enum omp_clause_code c1
,
9316 enum omp_clause_code c2
)
9319 unsigned length
= 0;
9322 for (c
= c1
; c
<= c2
; ++c
)
9323 length
+= 4 + strlen (omp_clause_code_name
[c
]);
9325 length
+= strlen ("expected ");
9326 buffer
= (char *) alloca (length
);
9329 for (c
= c1
; c
<= c2
; ++c
)
9331 const char *prefix
= length
? " or " : "expected ";
9333 strcpy (buffer
+ length
, prefix
);
9334 length
+= strlen (prefix
);
9335 strcpy (buffer
+ length
, omp_clause_code_name
[c
]);
9336 length
+= strlen (omp_clause_code_name
[c
]);
9339 internal_error ("tree check: %s, have %s in %s, at %s:%d",
9340 buffer
, omp_clause_code_name
[TREE_CODE (node
)],
9341 function
, trim_filename (file
), line
);
9345 #undef DEFTREESTRUCT
9346 #define DEFTREESTRUCT(VAL, NAME) NAME,
9348 static const char *ts_enum_names
[] = {
9349 #include "treestruct.def"
9351 #undef DEFTREESTRUCT
9353 #define TS_ENUM_NAME(EN) (ts_enum_names[(EN)])
9355 /* Similar to tree_class_check_failed, except that we check for
9356 whether CODE contains the tree structure identified by EN. */
9359 tree_contains_struct_check_failed (const_tree node
,
9360 const enum tree_node_structure_enum en
,
9361 const char *file
, int line
,
9362 const char *function
)
9365 ("tree check: expected tree that contains %qs structure, have %qs in %s, at %s:%d",
9367 get_tree_code_name (TREE_CODE (node
)), function
, trim_filename (file
), line
);
9371 /* Similar to above, except that the check is for the bounds of a TREE_VEC's
9372 (dynamically sized) vector. */
9375 tree_vec_elt_check_failed (int idx
, int len
, const char *file
, int line
,
9376 const char *function
)
9379 ("tree check: accessed elt %d of tree_vec with %d elts in %s, at %s:%d",
9380 idx
+ 1, len
, function
, trim_filename (file
), line
);
9383 /* Similar to above, except that the check is for the bounds of the operand
9384 vector of an expression node EXP. */
9387 tree_operand_check_failed (int idx
, const_tree exp
, const char *file
,
9388 int line
, const char *function
)
9390 enum tree_code code
= TREE_CODE (exp
);
9392 ("tree check: accessed operand %d of %s with %d operands in %s, at %s:%d",
9393 idx
+ 1, get_tree_code_name (code
), TREE_OPERAND_LENGTH (exp
),
9394 function
, trim_filename (file
), line
);
9397 /* Similar to above, except that the check is for the number of
9398 operands of an OMP_CLAUSE node. */
9401 omp_clause_operand_check_failed (int idx
, const_tree t
, const char *file
,
9402 int line
, const char *function
)
9405 ("tree check: accessed operand %d of omp_clause %s with %d operands "
9406 "in %s, at %s:%d", idx
+ 1, omp_clause_code_name
[OMP_CLAUSE_CODE (t
)],
9407 omp_clause_num_ops
[OMP_CLAUSE_CODE (t
)], function
,
9408 trim_filename (file
), line
);
9410 #endif /* ENABLE_TREE_CHECKING */
9412 /* Create a new vector type node holding SUBPARTS units of type INNERTYPE,
9413 and mapped to the machine mode MODE. Initialize its fields and build
9414 the information necessary for debugging output. */
9417 make_vector_type (tree innertype
, int nunits
, enum machine_mode mode
)
9420 hashval_t hashcode
= 0;
9422 t
= make_node (VECTOR_TYPE
);
9423 TREE_TYPE (t
) = TYPE_MAIN_VARIANT (innertype
);
9424 SET_TYPE_VECTOR_SUBPARTS (t
, nunits
);
9425 SET_TYPE_MODE (t
, mode
);
9427 if (TYPE_STRUCTURAL_EQUALITY_P (innertype
))
9428 SET_TYPE_STRUCTURAL_EQUALITY (t
);
9429 else if (TYPE_CANONICAL (innertype
) != innertype
9430 || mode
!= VOIDmode
)
9432 = make_vector_type (TYPE_CANONICAL (innertype
), nunits
, VOIDmode
);
9436 hashcode
= iterative_hash_host_wide_int (VECTOR_TYPE
, hashcode
);
9437 hashcode
= iterative_hash_host_wide_int (nunits
, hashcode
);
9438 hashcode
= iterative_hash_host_wide_int (mode
, hashcode
);
9439 hashcode
= iterative_hash_object (TYPE_HASH (TREE_TYPE (t
)), hashcode
);
9440 t
= type_hash_canon (hashcode
, t
);
9442 /* We have built a main variant, based on the main variant of the
9443 inner type. Use it to build the variant we return. */
9444 if ((TYPE_ATTRIBUTES (innertype
) || TYPE_QUALS (innertype
))
9445 && TREE_TYPE (t
) != innertype
)
9446 return build_type_attribute_qual_variant (t
,
9447 TYPE_ATTRIBUTES (innertype
),
9448 TYPE_QUALS (innertype
));
9454 make_or_reuse_type (unsigned size
, int unsignedp
)
9456 if (size
== INT_TYPE_SIZE
)
9457 return unsignedp
? unsigned_type_node
: integer_type_node
;
9458 if (size
== CHAR_TYPE_SIZE
)
9459 return unsignedp
? unsigned_char_type_node
: signed_char_type_node
;
9460 if (size
== SHORT_TYPE_SIZE
)
9461 return unsignedp
? short_unsigned_type_node
: short_integer_type_node
;
9462 if (size
== LONG_TYPE_SIZE
)
9463 return unsignedp
? long_unsigned_type_node
: long_integer_type_node
;
9464 if (size
== LONG_LONG_TYPE_SIZE
)
9465 return (unsignedp
? long_long_unsigned_type_node
9466 : long_long_integer_type_node
);
9467 if (size
== 128 && int128_integer_type_node
)
9468 return (unsignedp
? int128_unsigned_type_node
9469 : int128_integer_type_node
);
9472 return make_unsigned_type (size
);
9474 return make_signed_type (size
);
9477 /* Create or reuse a fract type by SIZE, UNSIGNEDP, and SATP. */
9480 make_or_reuse_fract_type (unsigned size
, int unsignedp
, int satp
)
9484 if (size
== SHORT_FRACT_TYPE_SIZE
)
9485 return unsignedp
? sat_unsigned_short_fract_type_node
9486 : sat_short_fract_type_node
;
9487 if (size
== FRACT_TYPE_SIZE
)
9488 return unsignedp
? sat_unsigned_fract_type_node
: sat_fract_type_node
;
9489 if (size
== LONG_FRACT_TYPE_SIZE
)
9490 return unsignedp
? sat_unsigned_long_fract_type_node
9491 : sat_long_fract_type_node
;
9492 if (size
== LONG_LONG_FRACT_TYPE_SIZE
)
9493 return unsignedp
? sat_unsigned_long_long_fract_type_node
9494 : sat_long_long_fract_type_node
;
9498 if (size
== SHORT_FRACT_TYPE_SIZE
)
9499 return unsignedp
? unsigned_short_fract_type_node
9500 : short_fract_type_node
;
9501 if (size
== FRACT_TYPE_SIZE
)
9502 return unsignedp
? unsigned_fract_type_node
: fract_type_node
;
9503 if (size
== LONG_FRACT_TYPE_SIZE
)
9504 return unsignedp
? unsigned_long_fract_type_node
9505 : long_fract_type_node
;
9506 if (size
== LONG_LONG_FRACT_TYPE_SIZE
)
9507 return unsignedp
? unsigned_long_long_fract_type_node
9508 : long_long_fract_type_node
;
9511 return make_fract_type (size
, unsignedp
, satp
);
9514 /* Create or reuse an accum type by SIZE, UNSIGNEDP, and SATP. */
9517 make_or_reuse_accum_type (unsigned size
, int unsignedp
, int satp
)
9521 if (size
== SHORT_ACCUM_TYPE_SIZE
)
9522 return unsignedp
? sat_unsigned_short_accum_type_node
9523 : sat_short_accum_type_node
;
9524 if (size
== ACCUM_TYPE_SIZE
)
9525 return unsignedp
? sat_unsigned_accum_type_node
: sat_accum_type_node
;
9526 if (size
== LONG_ACCUM_TYPE_SIZE
)
9527 return unsignedp
? sat_unsigned_long_accum_type_node
9528 : sat_long_accum_type_node
;
9529 if (size
== LONG_LONG_ACCUM_TYPE_SIZE
)
9530 return unsignedp
? sat_unsigned_long_long_accum_type_node
9531 : sat_long_long_accum_type_node
;
9535 if (size
== SHORT_ACCUM_TYPE_SIZE
)
9536 return unsignedp
? unsigned_short_accum_type_node
9537 : short_accum_type_node
;
9538 if (size
== ACCUM_TYPE_SIZE
)
9539 return unsignedp
? unsigned_accum_type_node
: accum_type_node
;
9540 if (size
== LONG_ACCUM_TYPE_SIZE
)
9541 return unsignedp
? unsigned_long_accum_type_node
9542 : long_accum_type_node
;
9543 if (size
== LONG_LONG_ACCUM_TYPE_SIZE
)
9544 return unsignedp
? unsigned_long_long_accum_type_node
9545 : long_long_accum_type_node
;
9548 return make_accum_type (size
, unsignedp
, satp
);
9552 /* Create an atomic variant node for TYPE. This routine is called
9553 during initialization of data types to create the 5 basic atomic
9554 types. The generic build_variant_type function requires these to
9555 already be set up in order to function properly, so cannot be
9556 called from there. If ALIGN is non-zero, then ensure alignment is
9557 overridden to this value. */
9560 build_atomic_base (tree type
, unsigned int align
)
9564 /* Make sure its not already registered. */
9565 if ((t
= get_qualified_type (type
, TYPE_QUAL_ATOMIC
)))
9568 t
= build_variant_type_copy (type
);
9569 set_type_quals (t
, TYPE_QUAL_ATOMIC
);
9572 TYPE_ALIGN (t
) = align
;
9577 /* Create nodes for all integer types (and error_mark_node) using the sizes
9578 of C datatypes. SIGNED_CHAR specifies whether char is signed,
9579 SHORT_DOUBLE specifies whether double should be of the same precision
9583 build_common_tree_nodes (bool signed_char
, bool short_double
)
9585 error_mark_node
= make_node (ERROR_MARK
);
9586 TREE_TYPE (error_mark_node
) = error_mark_node
;
9588 initialize_sizetypes ();
9590 /* Define both `signed char' and `unsigned char'. */
9591 signed_char_type_node
= make_signed_type (CHAR_TYPE_SIZE
);
9592 TYPE_STRING_FLAG (signed_char_type_node
) = 1;
9593 unsigned_char_type_node
= make_unsigned_type (CHAR_TYPE_SIZE
);
9594 TYPE_STRING_FLAG (unsigned_char_type_node
) = 1;
9596 /* Define `char', which is like either `signed char' or `unsigned char'
9597 but not the same as either. */
9600 ? make_signed_type (CHAR_TYPE_SIZE
)
9601 : make_unsigned_type (CHAR_TYPE_SIZE
));
9602 TYPE_STRING_FLAG (char_type_node
) = 1;
9604 short_integer_type_node
= make_signed_type (SHORT_TYPE_SIZE
);
9605 short_unsigned_type_node
= make_unsigned_type (SHORT_TYPE_SIZE
);
9606 integer_type_node
= make_signed_type (INT_TYPE_SIZE
);
9607 unsigned_type_node
= make_unsigned_type (INT_TYPE_SIZE
);
9608 long_integer_type_node
= make_signed_type (LONG_TYPE_SIZE
);
9609 long_unsigned_type_node
= make_unsigned_type (LONG_TYPE_SIZE
);
9610 long_long_integer_type_node
= make_signed_type (LONG_LONG_TYPE_SIZE
);
9611 long_long_unsigned_type_node
= make_unsigned_type (LONG_LONG_TYPE_SIZE
);
9612 #if HOST_BITS_PER_WIDE_INT >= 64
9613 /* TODO: This isn't correct, but as logic depends at the moment on
9614 host's instead of target's wide-integer.
9615 If there is a target not supporting TImode, but has an 128-bit
9616 integer-scalar register, this target check needs to be adjusted. */
9617 if (targetm
.scalar_mode_supported_p (TImode
))
9619 int128_integer_type_node
= make_signed_type (128);
9620 int128_unsigned_type_node
= make_unsigned_type (128);
9624 /* Define a boolean type. This type only represents boolean values but
9625 may be larger than char depending on the value of BOOL_TYPE_SIZE.
9626 Front ends which want to override this size (i.e. Java) can redefine
9627 boolean_type_node before calling build_common_tree_nodes_2. */
9628 boolean_type_node
= make_unsigned_type (BOOL_TYPE_SIZE
);
9629 TREE_SET_CODE (boolean_type_node
, BOOLEAN_TYPE
);
9630 TYPE_MAX_VALUE (boolean_type_node
) = build_int_cst (boolean_type_node
, 1);
9631 TYPE_PRECISION (boolean_type_node
) = 1;
9633 /* Define what type to use for size_t. */
9634 if (strcmp (SIZE_TYPE
, "unsigned int") == 0)
9635 size_type_node
= unsigned_type_node
;
9636 else if (strcmp (SIZE_TYPE
, "long unsigned int") == 0)
9637 size_type_node
= long_unsigned_type_node
;
9638 else if (strcmp (SIZE_TYPE
, "long long unsigned int") == 0)
9639 size_type_node
= long_long_unsigned_type_node
;
9640 else if (strcmp (SIZE_TYPE
, "short unsigned int") == 0)
9641 size_type_node
= short_unsigned_type_node
;
9645 /* Fill in the rest of the sized types. Reuse existing type nodes
9647 intQI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (QImode
), 0);
9648 intHI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (HImode
), 0);
9649 intSI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (SImode
), 0);
9650 intDI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (DImode
), 0);
9651 intTI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (TImode
), 0);
9653 unsigned_intQI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (QImode
), 1);
9654 unsigned_intHI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (HImode
), 1);
9655 unsigned_intSI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (SImode
), 1);
9656 unsigned_intDI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (DImode
), 1);
9657 unsigned_intTI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (TImode
), 1);
9659 /* Don't call build_qualified type for atomics. That routine does
9660 special processing for atomics, and until they are initialized
9661 it's better not to make that call.
9663 Check to see if there is a target override for atomic types. */
9665 atomicQI_type_node
= build_atomic_base (unsigned_intQI_type_node
,
9666 targetm
.atomic_align_for_mode (QImode
));
9667 atomicHI_type_node
= build_atomic_base (unsigned_intHI_type_node
,
9668 targetm
.atomic_align_for_mode (HImode
));
9669 atomicSI_type_node
= build_atomic_base (unsigned_intSI_type_node
,
9670 targetm
.atomic_align_for_mode (SImode
));
9671 atomicDI_type_node
= build_atomic_base (unsigned_intDI_type_node
,
9672 targetm
.atomic_align_for_mode (DImode
));
9673 atomicTI_type_node
= build_atomic_base (unsigned_intTI_type_node
,
9674 targetm
.atomic_align_for_mode (TImode
));
9676 access_public_node
= get_identifier ("public");
9677 access_protected_node
= get_identifier ("protected");
9678 access_private_node
= get_identifier ("private");
9680 /* Define these next since types below may used them. */
9681 integer_zero_node
= build_int_cst (integer_type_node
, 0);
9682 integer_one_node
= build_int_cst (integer_type_node
, 1);
9683 integer_three_node
= build_int_cst (integer_type_node
, 3);
9684 integer_minus_one_node
= build_int_cst (integer_type_node
, -1);
9686 size_zero_node
= size_int (0);
9687 size_one_node
= size_int (1);
9688 bitsize_zero_node
= bitsize_int (0);
9689 bitsize_one_node
= bitsize_int (1);
9690 bitsize_unit_node
= bitsize_int (BITS_PER_UNIT
);
9692 boolean_false_node
= TYPE_MIN_VALUE (boolean_type_node
);
9693 boolean_true_node
= TYPE_MAX_VALUE (boolean_type_node
);
9695 void_type_node
= make_node (VOID_TYPE
);
9696 layout_type (void_type_node
);
9698 /* We are not going to have real types in C with less than byte alignment,
9699 so we might as well not have any types that claim to have it. */
9700 TYPE_ALIGN (void_type_node
) = BITS_PER_UNIT
;
9701 TYPE_USER_ALIGN (void_type_node
) = 0;
9703 null_pointer_node
= build_int_cst (build_pointer_type (void_type_node
), 0);
9704 layout_type (TREE_TYPE (null_pointer_node
));
9706 ptr_type_node
= build_pointer_type (void_type_node
);
9708 = build_pointer_type (build_type_variant (void_type_node
, 1, 0));
9709 fileptr_type_node
= ptr_type_node
;
9711 pointer_sized_int_node
= build_nonstandard_integer_type (POINTER_SIZE
, 1);
9713 float_type_node
= make_node (REAL_TYPE
);
9714 TYPE_PRECISION (float_type_node
) = FLOAT_TYPE_SIZE
;
9715 layout_type (float_type_node
);
9717 double_type_node
= make_node (REAL_TYPE
);
9719 TYPE_PRECISION (double_type_node
) = FLOAT_TYPE_SIZE
;
9721 TYPE_PRECISION (double_type_node
) = DOUBLE_TYPE_SIZE
;
9722 layout_type (double_type_node
);
9724 long_double_type_node
= make_node (REAL_TYPE
);
9725 TYPE_PRECISION (long_double_type_node
) = LONG_DOUBLE_TYPE_SIZE
;
9726 layout_type (long_double_type_node
);
9728 float_ptr_type_node
= build_pointer_type (float_type_node
);
9729 double_ptr_type_node
= build_pointer_type (double_type_node
);
9730 long_double_ptr_type_node
= build_pointer_type (long_double_type_node
);
9731 integer_ptr_type_node
= build_pointer_type (integer_type_node
);
9733 /* Fixed size integer types. */
9734 uint16_type_node
= build_nonstandard_integer_type (16, true);
9735 uint32_type_node
= build_nonstandard_integer_type (32, true);
9736 uint64_type_node
= build_nonstandard_integer_type (64, true);
9738 /* Decimal float types. */
9739 dfloat32_type_node
= make_node (REAL_TYPE
);
9740 TYPE_PRECISION (dfloat32_type_node
) = DECIMAL32_TYPE_SIZE
;
9741 layout_type (dfloat32_type_node
);
9742 SET_TYPE_MODE (dfloat32_type_node
, SDmode
);
9743 dfloat32_ptr_type_node
= build_pointer_type (dfloat32_type_node
);
9745 dfloat64_type_node
= make_node (REAL_TYPE
);
9746 TYPE_PRECISION (dfloat64_type_node
) = DECIMAL64_TYPE_SIZE
;
9747 layout_type (dfloat64_type_node
);
9748 SET_TYPE_MODE (dfloat64_type_node
, DDmode
);
9749 dfloat64_ptr_type_node
= build_pointer_type (dfloat64_type_node
);
9751 dfloat128_type_node
= make_node (REAL_TYPE
);
9752 TYPE_PRECISION (dfloat128_type_node
) = DECIMAL128_TYPE_SIZE
;
9753 layout_type (dfloat128_type_node
);
9754 SET_TYPE_MODE (dfloat128_type_node
, TDmode
);
9755 dfloat128_ptr_type_node
= build_pointer_type (dfloat128_type_node
);
9757 complex_integer_type_node
= build_complex_type (integer_type_node
);
9758 complex_float_type_node
= build_complex_type (float_type_node
);
9759 complex_double_type_node
= build_complex_type (double_type_node
);
9760 complex_long_double_type_node
= build_complex_type (long_double_type_node
);
9762 /* Make fixed-point nodes based on sat/non-sat and signed/unsigned. */
9763 #define MAKE_FIXED_TYPE_NODE(KIND,SIZE) \
9764 sat_ ## KIND ## _type_node = \
9765 make_sat_signed_ ## KIND ## _type (SIZE); \
9766 sat_unsigned_ ## KIND ## _type_node = \
9767 make_sat_unsigned_ ## KIND ## _type (SIZE); \
9768 KIND ## _type_node = make_signed_ ## KIND ## _type (SIZE); \
9769 unsigned_ ## KIND ## _type_node = \
9770 make_unsigned_ ## KIND ## _type (SIZE);
9772 #define MAKE_FIXED_TYPE_NODE_WIDTH(KIND,WIDTH,SIZE) \
9773 sat_ ## WIDTH ## KIND ## _type_node = \
9774 make_sat_signed_ ## KIND ## _type (SIZE); \
9775 sat_unsigned_ ## WIDTH ## KIND ## _type_node = \
9776 make_sat_unsigned_ ## KIND ## _type (SIZE); \
9777 WIDTH ## KIND ## _type_node = make_signed_ ## KIND ## _type (SIZE); \
9778 unsigned_ ## WIDTH ## KIND ## _type_node = \
9779 make_unsigned_ ## KIND ## _type (SIZE);
9781 /* Make fixed-point type nodes based on four different widths. */
9782 #define MAKE_FIXED_TYPE_NODE_FAMILY(N1,N2) \
9783 MAKE_FIXED_TYPE_NODE_WIDTH (N1, short_, SHORT_ ## N2 ## _TYPE_SIZE) \
9784 MAKE_FIXED_TYPE_NODE (N1, N2 ## _TYPE_SIZE) \
9785 MAKE_FIXED_TYPE_NODE_WIDTH (N1, long_, LONG_ ## N2 ## _TYPE_SIZE) \
9786 MAKE_FIXED_TYPE_NODE_WIDTH (N1, long_long_, LONG_LONG_ ## N2 ## _TYPE_SIZE)
9788 /* Make fixed-point mode nodes based on sat/non-sat and signed/unsigned. */
9789 #define MAKE_FIXED_MODE_NODE(KIND,NAME,MODE) \
9790 NAME ## _type_node = \
9791 make_or_reuse_signed_ ## KIND ## _type (GET_MODE_BITSIZE (MODE ## mode)); \
9792 u ## NAME ## _type_node = \
9793 make_or_reuse_unsigned_ ## KIND ## _type \
9794 (GET_MODE_BITSIZE (U ## MODE ## mode)); \
9795 sat_ ## NAME ## _type_node = \
9796 make_or_reuse_sat_signed_ ## KIND ## _type \
9797 (GET_MODE_BITSIZE (MODE ## mode)); \
9798 sat_u ## NAME ## _type_node = \
9799 make_or_reuse_sat_unsigned_ ## KIND ## _type \
9800 (GET_MODE_BITSIZE (U ## MODE ## mode));
9802 /* Fixed-point type and mode nodes. */
9803 MAKE_FIXED_TYPE_NODE_FAMILY (fract
, FRACT
)
9804 MAKE_FIXED_TYPE_NODE_FAMILY (accum
, ACCUM
)
9805 MAKE_FIXED_MODE_NODE (fract
, qq
, QQ
)
9806 MAKE_FIXED_MODE_NODE (fract
, hq
, HQ
)
9807 MAKE_FIXED_MODE_NODE (fract
, sq
, SQ
)
9808 MAKE_FIXED_MODE_NODE (fract
, dq
, DQ
)
9809 MAKE_FIXED_MODE_NODE (fract
, tq
, TQ
)
9810 MAKE_FIXED_MODE_NODE (accum
, ha
, HA
)
9811 MAKE_FIXED_MODE_NODE (accum
, sa
, SA
)
9812 MAKE_FIXED_MODE_NODE (accum
, da
, DA
)
9813 MAKE_FIXED_MODE_NODE (accum
, ta
, TA
)
9816 tree t
= targetm
.build_builtin_va_list ();
9818 /* Many back-ends define record types without setting TYPE_NAME.
9819 If we copied the record type here, we'd keep the original
9820 record type without a name. This breaks name mangling. So,
9821 don't copy record types and let c_common_nodes_and_builtins()
9822 declare the type to be __builtin_va_list. */
9823 if (TREE_CODE (t
) != RECORD_TYPE
)
9824 t
= build_variant_type_copy (t
);
9826 va_list_type_node
= t
;
9830 /* Modify DECL for given flags.
9831 TM_PURE attribute is set only on types, so the function will modify
9832 DECL's type when ECF_TM_PURE is used. */
9835 set_call_expr_flags (tree decl
, int flags
)
9837 if (flags
& ECF_NOTHROW
)
9838 TREE_NOTHROW (decl
) = 1;
9839 if (flags
& ECF_CONST
)
9840 TREE_READONLY (decl
) = 1;
9841 if (flags
& ECF_PURE
)
9842 DECL_PURE_P (decl
) = 1;
9843 if (flags
& ECF_LOOPING_CONST_OR_PURE
)
9844 DECL_LOOPING_CONST_OR_PURE_P (decl
) = 1;
9845 if (flags
& ECF_NOVOPS
)
9846 DECL_IS_NOVOPS (decl
) = 1;
9847 if (flags
& ECF_NORETURN
)
9848 TREE_THIS_VOLATILE (decl
) = 1;
9849 if (flags
& ECF_MALLOC
)
9850 DECL_IS_MALLOC (decl
) = 1;
9851 if (flags
& ECF_RETURNS_TWICE
)
9852 DECL_IS_RETURNS_TWICE (decl
) = 1;
9853 if (flags
& ECF_LEAF
)
9854 DECL_ATTRIBUTES (decl
) = tree_cons (get_identifier ("leaf"),
9855 NULL
, DECL_ATTRIBUTES (decl
));
9856 if ((flags
& ECF_TM_PURE
) && flag_tm
)
9857 apply_tm_attr (decl
, get_identifier ("transaction_pure"));
9858 /* Looping const or pure is implied by noreturn.
9859 There is currently no way to declare looping const or looping pure alone. */
9860 gcc_assert (!(flags
& ECF_LOOPING_CONST_OR_PURE
)
9861 || ((flags
& ECF_NORETURN
) && (flags
& (ECF_CONST
| ECF_PURE
))));
9865 /* A subroutine of build_common_builtin_nodes. Define a builtin function. */
9868 local_define_builtin (const char *name
, tree type
, enum built_in_function code
,
9869 const char *library_name
, int ecf_flags
)
9873 decl
= add_builtin_function (name
, type
, code
, BUILT_IN_NORMAL
,
9874 library_name
, NULL_TREE
);
9875 set_call_expr_flags (decl
, ecf_flags
);
9877 set_builtin_decl (code
, decl
, true);
9880 /* Call this function after instantiating all builtins that the language
9881 front end cares about. This will build the rest of the builtins
9882 and internal functions that are relied upon by the tree optimizers and
9886 build_common_builtin_nodes (void)
9891 if (!builtin_decl_explicit_p (BUILT_IN_UNREACHABLE
))
9893 ftype
= build_function_type (void_type_node
, void_list_node
);
9894 local_define_builtin ("__builtin_unreachable", ftype
, BUILT_IN_UNREACHABLE
,
9895 "__builtin_unreachable",
9896 ECF_NOTHROW
| ECF_LEAF
| ECF_NORETURN
9897 | ECF_CONST
| ECF_LEAF
);
9900 if (!builtin_decl_explicit_p (BUILT_IN_MEMCPY
)
9901 || !builtin_decl_explicit_p (BUILT_IN_MEMMOVE
))
9903 ftype
= build_function_type_list (ptr_type_node
,
9904 ptr_type_node
, const_ptr_type_node
,
9905 size_type_node
, NULL_TREE
);
9907 if (!builtin_decl_explicit_p (BUILT_IN_MEMCPY
))
9908 local_define_builtin ("__builtin_memcpy", ftype
, BUILT_IN_MEMCPY
,
9909 "memcpy", ECF_NOTHROW
| ECF_LEAF
);
9910 if (!builtin_decl_explicit_p (BUILT_IN_MEMMOVE
))
9911 local_define_builtin ("__builtin_memmove", ftype
, BUILT_IN_MEMMOVE
,
9912 "memmove", ECF_NOTHROW
| ECF_LEAF
);
9915 if (!builtin_decl_explicit_p (BUILT_IN_MEMCMP
))
9917 ftype
= build_function_type_list (integer_type_node
, const_ptr_type_node
,
9918 const_ptr_type_node
, size_type_node
,
9920 local_define_builtin ("__builtin_memcmp", ftype
, BUILT_IN_MEMCMP
,
9921 "memcmp", ECF_PURE
| ECF_NOTHROW
| ECF_LEAF
);
9924 if (!builtin_decl_explicit_p (BUILT_IN_MEMSET
))
9926 ftype
= build_function_type_list (ptr_type_node
,
9927 ptr_type_node
, integer_type_node
,
9928 size_type_node
, NULL_TREE
);
9929 local_define_builtin ("__builtin_memset", ftype
, BUILT_IN_MEMSET
,
9930 "memset", ECF_NOTHROW
| ECF_LEAF
);
9933 if (!builtin_decl_explicit_p (BUILT_IN_ALLOCA
))
9935 ftype
= build_function_type_list (ptr_type_node
,
9936 size_type_node
, NULL_TREE
);
9937 local_define_builtin ("__builtin_alloca", ftype
, BUILT_IN_ALLOCA
,
9938 "alloca", ECF_MALLOC
| ECF_NOTHROW
| ECF_LEAF
);
9941 ftype
= build_function_type_list (ptr_type_node
, size_type_node
,
9942 size_type_node
, NULL_TREE
);
9943 local_define_builtin ("__builtin_alloca_with_align", ftype
,
9944 BUILT_IN_ALLOCA_WITH_ALIGN
, "alloca",
9945 ECF_MALLOC
| ECF_NOTHROW
| ECF_LEAF
);
9947 /* If we're checking the stack, `alloca' can throw. */
9948 if (flag_stack_check
)
9950 TREE_NOTHROW (builtin_decl_explicit (BUILT_IN_ALLOCA
)) = 0;
9951 TREE_NOTHROW (builtin_decl_explicit (BUILT_IN_ALLOCA_WITH_ALIGN
)) = 0;
9954 ftype
= build_function_type_list (void_type_node
,
9955 ptr_type_node
, ptr_type_node
,
9956 ptr_type_node
, NULL_TREE
);
9957 local_define_builtin ("__builtin_init_trampoline", ftype
,
9958 BUILT_IN_INIT_TRAMPOLINE
,
9959 "__builtin_init_trampoline", ECF_NOTHROW
| ECF_LEAF
);
9960 local_define_builtin ("__builtin_init_heap_trampoline", ftype
,
9961 BUILT_IN_INIT_HEAP_TRAMPOLINE
,
9962 "__builtin_init_heap_trampoline",
9963 ECF_NOTHROW
| ECF_LEAF
);
9965 ftype
= build_function_type_list (ptr_type_node
, ptr_type_node
, NULL_TREE
);
9966 local_define_builtin ("__builtin_adjust_trampoline", ftype
,
9967 BUILT_IN_ADJUST_TRAMPOLINE
,
9968 "__builtin_adjust_trampoline",
9969 ECF_CONST
| ECF_NOTHROW
);
9971 ftype
= build_function_type_list (void_type_node
,
9972 ptr_type_node
, ptr_type_node
, NULL_TREE
);
9973 local_define_builtin ("__builtin_nonlocal_goto", ftype
,
9974 BUILT_IN_NONLOCAL_GOTO
,
9975 "__builtin_nonlocal_goto",
9976 ECF_NORETURN
| ECF_NOTHROW
);
9978 ftype
= build_function_type_list (void_type_node
,
9979 ptr_type_node
, ptr_type_node
, NULL_TREE
);
9980 local_define_builtin ("__builtin_setjmp_setup", ftype
,
9981 BUILT_IN_SETJMP_SETUP
,
9982 "__builtin_setjmp_setup", ECF_NOTHROW
);
9984 ftype
= build_function_type_list (void_type_node
, ptr_type_node
, NULL_TREE
);
9985 local_define_builtin ("__builtin_setjmp_receiver", ftype
,
9986 BUILT_IN_SETJMP_RECEIVER
,
9987 "__builtin_setjmp_receiver", ECF_NOTHROW
| ECF_LEAF
);
9989 ftype
= build_function_type_list (ptr_type_node
, NULL_TREE
);
9990 local_define_builtin ("__builtin_stack_save", ftype
, BUILT_IN_STACK_SAVE
,
9991 "__builtin_stack_save", ECF_NOTHROW
| ECF_LEAF
);
9993 ftype
= build_function_type_list (void_type_node
, ptr_type_node
, NULL_TREE
);
9994 local_define_builtin ("__builtin_stack_restore", ftype
,
9995 BUILT_IN_STACK_RESTORE
,
9996 "__builtin_stack_restore", ECF_NOTHROW
| ECF_LEAF
);
9998 /* If there's a possibility that we might use the ARM EABI, build the
9999 alternate __cxa_end_cleanup node used to resume from C++ and Java. */
10000 if (targetm
.arm_eabi_unwinder
)
10002 ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
10003 local_define_builtin ("__builtin_cxa_end_cleanup", ftype
,
10004 BUILT_IN_CXA_END_CLEANUP
,
10005 "__cxa_end_cleanup", ECF_NORETURN
| ECF_LEAF
);
10008 ftype
= build_function_type_list (void_type_node
, ptr_type_node
, NULL_TREE
);
10009 local_define_builtin ("__builtin_unwind_resume", ftype
,
10010 BUILT_IN_UNWIND_RESUME
,
10011 ((targetm_common
.except_unwind_info (&global_options
)
10013 ? "_Unwind_SjLj_Resume" : "_Unwind_Resume"),
10016 if (builtin_decl_explicit (BUILT_IN_RETURN_ADDRESS
) == NULL_TREE
)
10018 ftype
= build_function_type_list (ptr_type_node
, integer_type_node
,
10020 local_define_builtin ("__builtin_return_address", ftype
,
10021 BUILT_IN_RETURN_ADDRESS
,
10022 "__builtin_return_address",
10026 if (!builtin_decl_explicit_p (BUILT_IN_PROFILE_FUNC_ENTER
)
10027 || !builtin_decl_explicit_p (BUILT_IN_PROFILE_FUNC_EXIT
))
10029 ftype
= build_function_type_list (void_type_node
, ptr_type_node
,
10030 ptr_type_node
, NULL_TREE
);
10031 if (!builtin_decl_explicit_p (BUILT_IN_PROFILE_FUNC_ENTER
))
10032 local_define_builtin ("__cyg_profile_func_enter", ftype
,
10033 BUILT_IN_PROFILE_FUNC_ENTER
,
10034 "__cyg_profile_func_enter", 0);
10035 if (!builtin_decl_explicit_p (BUILT_IN_PROFILE_FUNC_EXIT
))
10036 local_define_builtin ("__cyg_profile_func_exit", ftype
,
10037 BUILT_IN_PROFILE_FUNC_EXIT
,
10038 "__cyg_profile_func_exit", 0);
10041 /* The exception object and filter values from the runtime. The argument
10042 must be zero before exception lowering, i.e. from the front end. After
10043 exception lowering, it will be the region number for the exception
10044 landing pad. These functions are PURE instead of CONST to prevent
10045 them from being hoisted past the exception edge that will initialize
10046 its value in the landing pad. */
10047 ftype
= build_function_type_list (ptr_type_node
,
10048 integer_type_node
, NULL_TREE
);
10049 ecf_flags
= ECF_PURE
| ECF_NOTHROW
| ECF_LEAF
;
10050 /* Only use TM_PURE if we we have TM language support. */
10051 if (builtin_decl_explicit_p (BUILT_IN_TM_LOAD_1
))
10052 ecf_flags
|= ECF_TM_PURE
;
10053 local_define_builtin ("__builtin_eh_pointer", ftype
, BUILT_IN_EH_POINTER
,
10054 "__builtin_eh_pointer", ecf_flags
);
10056 tmp
= lang_hooks
.types
.type_for_mode (targetm
.eh_return_filter_mode (), 0);
10057 ftype
= build_function_type_list (tmp
, integer_type_node
, NULL_TREE
);
10058 local_define_builtin ("__builtin_eh_filter", ftype
, BUILT_IN_EH_FILTER
,
10059 "__builtin_eh_filter", ECF_PURE
| ECF_NOTHROW
| ECF_LEAF
);
10061 ftype
= build_function_type_list (void_type_node
,
10062 integer_type_node
, integer_type_node
,
10064 local_define_builtin ("__builtin_eh_copy_values", ftype
,
10065 BUILT_IN_EH_COPY_VALUES
,
10066 "__builtin_eh_copy_values", ECF_NOTHROW
);
10068 /* Complex multiplication and division. These are handled as builtins
10069 rather than optabs because emit_library_call_value doesn't support
10070 complex. Further, we can do slightly better with folding these
10071 beasties if the real and complex parts of the arguments are separate. */
10075 for (mode
= MIN_MODE_COMPLEX_FLOAT
; mode
<= MAX_MODE_COMPLEX_FLOAT
; ++mode
)
10077 char mode_name_buf
[4], *q
;
10079 enum built_in_function mcode
, dcode
;
10080 tree type
, inner_type
;
10081 const char *prefix
= "__";
10083 if (targetm
.libfunc_gnu_prefix
)
10086 type
= lang_hooks
.types
.type_for_mode ((enum machine_mode
) mode
, 0);
10089 inner_type
= TREE_TYPE (type
);
10091 ftype
= build_function_type_list (type
, inner_type
, inner_type
,
10092 inner_type
, inner_type
, NULL_TREE
);
10094 mcode
= ((enum built_in_function
)
10095 (BUILT_IN_COMPLEX_MUL_MIN
+ mode
- MIN_MODE_COMPLEX_FLOAT
));
10096 dcode
= ((enum built_in_function
)
10097 (BUILT_IN_COMPLEX_DIV_MIN
+ mode
- MIN_MODE_COMPLEX_FLOAT
));
10099 for (p
= GET_MODE_NAME (mode
), q
= mode_name_buf
; *p
; p
++, q
++)
10103 built_in_names
[mcode
] = concat (prefix
, "mul", mode_name_buf
, "3",
10105 local_define_builtin (built_in_names
[mcode
], ftype
, mcode
,
10106 built_in_names
[mcode
],
10107 ECF_CONST
| ECF_NOTHROW
| ECF_LEAF
);
10109 built_in_names
[dcode
] = concat (prefix
, "div", mode_name_buf
, "3",
10111 local_define_builtin (built_in_names
[dcode
], ftype
, dcode
,
10112 built_in_names
[dcode
],
10113 ECF_CONST
| ECF_NOTHROW
| ECF_LEAF
);
10117 init_internal_fns ();
10120 /* HACK. GROSS. This is absolutely disgusting. I wish there was a
10123 If we requested a pointer to a vector, build up the pointers that
10124 we stripped off while looking for the inner type. Similarly for
10125 return values from functions.
10127 The argument TYPE is the top of the chain, and BOTTOM is the
10128 new type which we will point to. */
10131 reconstruct_complex_type (tree type
, tree bottom
)
10135 if (TREE_CODE (type
) == POINTER_TYPE
)
10137 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
10138 outer
= build_pointer_type_for_mode (inner
, TYPE_MODE (type
),
10139 TYPE_REF_CAN_ALIAS_ALL (type
));
10141 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10143 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
10144 outer
= build_reference_type_for_mode (inner
, TYPE_MODE (type
),
10145 TYPE_REF_CAN_ALIAS_ALL (type
));
10147 else if (TREE_CODE (type
) == ARRAY_TYPE
)
10149 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
10150 outer
= build_array_type (inner
, TYPE_DOMAIN (type
));
10152 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10154 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
10155 outer
= build_function_type (inner
, TYPE_ARG_TYPES (type
));
10157 else if (TREE_CODE (type
) == METHOD_TYPE
)
10159 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
10160 /* The build_method_type_directly() routine prepends 'this' to argument list,
10161 so we must compensate by getting rid of it. */
10163 = build_method_type_directly
10164 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (type
))),
10166 TREE_CHAIN (TYPE_ARG_TYPES (type
)));
10168 else if (TREE_CODE (type
) == OFFSET_TYPE
)
10170 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
10171 outer
= build_offset_type (TYPE_OFFSET_BASETYPE (type
), inner
);
10176 return build_type_attribute_qual_variant (outer
, TYPE_ATTRIBUTES (type
),
10177 TYPE_QUALS (type
));
10180 /* Returns a vector tree node given a mode (integer, vector, or BLKmode) and
10183 build_vector_type_for_mode (tree innertype
, enum machine_mode mode
)
10187 switch (GET_MODE_CLASS (mode
))
10189 case MODE_VECTOR_INT
:
10190 case MODE_VECTOR_FLOAT
:
10191 case MODE_VECTOR_FRACT
:
10192 case MODE_VECTOR_UFRACT
:
10193 case MODE_VECTOR_ACCUM
:
10194 case MODE_VECTOR_UACCUM
:
10195 nunits
= GET_MODE_NUNITS (mode
);
10199 /* Check that there are no leftover bits. */
10200 gcc_assert (GET_MODE_BITSIZE (mode
)
10201 % TREE_INT_CST_LOW (TYPE_SIZE (innertype
)) == 0);
10203 nunits
= GET_MODE_BITSIZE (mode
)
10204 / TREE_INT_CST_LOW (TYPE_SIZE (innertype
));
10208 gcc_unreachable ();
10211 return make_vector_type (innertype
, nunits
, mode
);
10214 /* Similarly, but takes the inner type and number of units, which must be
10218 build_vector_type (tree innertype
, int nunits
)
10220 return make_vector_type (innertype
, nunits
, VOIDmode
);
10223 /* Similarly, but builds a variant type with TYPE_VECTOR_OPAQUE set. */
10226 build_opaque_vector_type (tree innertype
, int nunits
)
10228 tree t
= make_vector_type (innertype
, nunits
, VOIDmode
);
10230 /* We always build the non-opaque variant before the opaque one,
10231 so if it already exists, it is TYPE_NEXT_VARIANT of this one. */
10232 cand
= TYPE_NEXT_VARIANT (t
);
10234 && TYPE_VECTOR_OPAQUE (cand
)
10235 && check_qualified_type (cand
, t
, TYPE_QUALS (t
)))
10237 /* Othewise build a variant type and make sure to queue it after
10238 the non-opaque type. */
10239 cand
= build_distinct_type_copy (t
);
10240 TYPE_VECTOR_OPAQUE (cand
) = true;
10241 TYPE_CANONICAL (cand
) = TYPE_CANONICAL (t
);
10242 TYPE_NEXT_VARIANT (cand
) = TYPE_NEXT_VARIANT (t
);
10243 TYPE_NEXT_VARIANT (t
) = cand
;
10244 TYPE_MAIN_VARIANT (cand
) = TYPE_MAIN_VARIANT (t
);
10249 /* Given an initializer INIT, return TRUE if INIT is zero or some
10250 aggregate of zeros. Otherwise return FALSE. */
10252 initializer_zerop (const_tree init
)
10258 switch (TREE_CODE (init
))
10261 return integer_zerop (init
);
10264 /* ??? Note that this is not correct for C4X float formats. There,
10265 a bit pattern of all zeros is 1.0; 0.0 is encoded with the most
10266 negative exponent. */
10267 return real_zerop (init
)
10268 && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (init
));
10271 return fixed_zerop (init
);
10274 return integer_zerop (init
)
10275 || (real_zerop (init
)
10276 && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (TREE_REALPART (init
)))
10277 && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (TREE_IMAGPART (init
))));
10282 for (i
= 0; i
< VECTOR_CST_NELTS (init
); ++i
)
10283 if (!initializer_zerop (VECTOR_CST_ELT (init
, i
)))
10290 unsigned HOST_WIDE_INT idx
;
10292 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (init
), idx
, elt
)
10293 if (!initializer_zerop (elt
))
10302 /* We need to loop through all elements to handle cases like
10303 "\0" and "\0foobar". */
10304 for (i
= 0; i
< TREE_STRING_LENGTH (init
); ++i
)
10305 if (TREE_STRING_POINTER (init
)[i
] != '\0')
10316 /* Check if vector VEC consists of all the equal elements and
10317 that the number of elements corresponds to the type of VEC.
10318 The function returns first element of the vector
10319 or NULL_TREE if the vector is not uniform. */
10321 uniform_vector_p (const_tree vec
)
10326 if (vec
== NULL_TREE
)
10329 gcc_assert (VECTOR_TYPE_P (TREE_TYPE (vec
)));
10331 if (TREE_CODE (vec
) == VECTOR_CST
)
10333 first
= VECTOR_CST_ELT (vec
, 0);
10334 for (i
= 1; i
< VECTOR_CST_NELTS (vec
); ++i
)
10335 if (!operand_equal_p (first
, VECTOR_CST_ELT (vec
, i
), 0))
10341 else if (TREE_CODE (vec
) == CONSTRUCTOR
)
10343 first
= error_mark_node
;
10345 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (vec
), i
, t
)
10352 if (!operand_equal_p (first
, t
, 0))
10355 if (i
!= TYPE_VECTOR_SUBPARTS (TREE_TYPE (vec
)))
10364 /* Build an empty statement at location LOC. */
10367 build_empty_stmt (location_t loc
)
10369 tree t
= build1 (NOP_EXPR
, void_type_node
, size_zero_node
);
10370 SET_EXPR_LOCATION (t
, loc
);
10375 /* Build an OpenMP clause with code CODE. LOC is the location of the
10379 build_omp_clause (location_t loc
, enum omp_clause_code code
)
10384 length
= omp_clause_num_ops
[code
];
10385 size
= (sizeof (struct tree_omp_clause
) + (length
- 1) * sizeof (tree
));
10387 record_node_allocation_statistics (OMP_CLAUSE
, size
);
10389 t
= ggc_alloc_tree_node (size
);
10390 memset (t
, 0, size
);
10391 TREE_SET_CODE (t
, OMP_CLAUSE
);
10392 OMP_CLAUSE_SET_CODE (t
, code
);
10393 OMP_CLAUSE_LOCATION (t
) = loc
;
10398 /* Build a tcc_vl_exp object with code CODE and room for LEN operands. LEN
10399 includes the implicit operand count in TREE_OPERAND 0, and so must be >= 1.
10400 Except for the CODE and operand count field, other storage for the
10401 object is initialized to zeros. */
10404 build_vl_exp_stat (enum tree_code code
, int len MEM_STAT_DECL
)
10407 int length
= (len
- 1) * sizeof (tree
) + sizeof (struct tree_exp
);
10409 gcc_assert (TREE_CODE_CLASS (code
) == tcc_vl_exp
);
10410 gcc_assert (len
>= 1);
10412 record_node_allocation_statistics (code
, length
);
10414 t
= ggc_alloc_cleared_tree_node_stat (length PASS_MEM_STAT
);
10416 TREE_SET_CODE (t
, code
);
10418 /* Can't use TREE_OPERAND to store the length because if checking is
10419 enabled, it will try to check the length before we store it. :-P */
10420 t
->exp
.operands
[0] = build_int_cst (sizetype
, len
);
10425 /* Helper function for build_call_* functions; build a CALL_EXPR with
10426 indicated RETURN_TYPE, FN, and NARGS, but do not initialize any of
10427 the argument slots. */
10430 build_call_1 (tree return_type
, tree fn
, int nargs
)
10434 t
= build_vl_exp (CALL_EXPR
, nargs
+ 3);
10435 TREE_TYPE (t
) = return_type
;
10436 CALL_EXPR_FN (t
) = fn
;
10437 CALL_EXPR_STATIC_CHAIN (t
) = NULL
;
10442 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and
10443 FN and a null static chain slot. NARGS is the number of call arguments
10444 which are specified as "..." arguments. */
10447 build_call_nary (tree return_type
, tree fn
, int nargs
, ...)
10451 va_start (args
, nargs
);
10452 ret
= build_call_valist (return_type
, fn
, nargs
, args
);
10457 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and
10458 FN and a null static chain slot. NARGS is the number of call arguments
10459 which are specified as a va_list ARGS. */
10462 build_call_valist (tree return_type
, tree fn
, int nargs
, va_list args
)
10467 t
= build_call_1 (return_type
, fn
, nargs
);
10468 for (i
= 0; i
< nargs
; i
++)
10469 CALL_EXPR_ARG (t
, i
) = va_arg (args
, tree
);
10470 process_call_operands (t
);
10474 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and
10475 FN and a null static chain slot. NARGS is the number of call arguments
10476 which are specified as a tree array ARGS. */
10479 build_call_array_loc (location_t loc
, tree return_type
, tree fn
,
10480 int nargs
, const tree
*args
)
10485 t
= build_call_1 (return_type
, fn
, nargs
);
10486 for (i
= 0; i
< nargs
; i
++)
10487 CALL_EXPR_ARG (t
, i
) = args
[i
];
10488 process_call_operands (t
);
10489 SET_EXPR_LOCATION (t
, loc
);
10493 /* Like build_call_array, but takes a vec. */
10496 build_call_vec (tree return_type
, tree fn
, vec
<tree
, va_gc
> *args
)
10501 ret
= build_call_1 (return_type
, fn
, vec_safe_length (args
));
10502 FOR_EACH_VEC_SAFE_ELT (args
, ix
, t
)
10503 CALL_EXPR_ARG (ret
, ix
) = t
;
10504 process_call_operands (ret
);
10508 /* Return true if T (assumed to be a DECL) must be assigned a memory
10512 needs_to_live_in_memory (const_tree t
)
10514 return (TREE_ADDRESSABLE (t
)
10515 || is_global_var (t
)
10516 || (TREE_CODE (t
) == RESULT_DECL
10517 && !DECL_BY_REFERENCE (t
)
10518 && aggregate_value_p (t
, current_function_decl
)));
10521 /* Return value of a constant X and sign-extend it. */
10524 int_cst_value (const_tree x
)
10526 unsigned bits
= TYPE_PRECISION (TREE_TYPE (x
));
10527 unsigned HOST_WIDE_INT val
= TREE_INT_CST_LOW (x
);
10529 /* Make sure the sign-extended value will fit in a HOST_WIDE_INT. */
10530 gcc_assert (TREE_INT_CST_HIGH (x
) == 0
10531 || TREE_INT_CST_HIGH (x
) == -1);
10533 if (bits
< HOST_BITS_PER_WIDE_INT
)
10535 bool negative
= ((val
>> (bits
- 1)) & 1) != 0;
10537 val
|= (~(unsigned HOST_WIDE_INT
) 0) << (bits
- 1) << 1;
10539 val
&= ~((~(unsigned HOST_WIDE_INT
) 0) << (bits
- 1) << 1);
10545 /* Return value of a constant X and sign-extend it. */
10548 widest_int_cst_value (const_tree x
)
10550 unsigned bits
= TYPE_PRECISION (TREE_TYPE (x
));
10551 unsigned HOST_WIDEST_INT val
= TREE_INT_CST_LOW (x
);
10553 #if HOST_BITS_PER_WIDEST_INT > HOST_BITS_PER_WIDE_INT
10554 gcc_assert (HOST_BITS_PER_WIDEST_INT
>= HOST_BITS_PER_DOUBLE_INT
);
10555 val
|= (((unsigned HOST_WIDEST_INT
) TREE_INT_CST_HIGH (x
))
10556 << HOST_BITS_PER_WIDE_INT
);
10558 /* Make sure the sign-extended value will fit in a HOST_WIDE_INT. */
10559 gcc_assert (TREE_INT_CST_HIGH (x
) == 0
10560 || TREE_INT_CST_HIGH (x
) == -1);
10563 if (bits
< HOST_BITS_PER_WIDEST_INT
)
10565 bool negative
= ((val
>> (bits
- 1)) & 1) != 0;
10567 val
|= (~(unsigned HOST_WIDEST_INT
) 0) << (bits
- 1) << 1;
10569 val
&= ~((~(unsigned HOST_WIDEST_INT
) 0) << (bits
- 1) << 1);
10575 /* If TYPE is an integral or pointer type, return an integer type with
10576 the same precision which is unsigned iff UNSIGNEDP is true, or itself
10577 if TYPE is already an integer type of signedness UNSIGNEDP. */
10580 signed_or_unsigned_type_for (int unsignedp
, tree type
)
10582 if (TREE_CODE (type
) == INTEGER_TYPE
&& TYPE_UNSIGNED (type
) == unsignedp
)
10585 if (TREE_CODE (type
) == VECTOR_TYPE
)
10587 tree inner
= TREE_TYPE (type
);
10588 tree inner2
= signed_or_unsigned_type_for (unsignedp
, inner
);
10591 if (inner
== inner2
)
10593 return build_vector_type (inner2
, TYPE_VECTOR_SUBPARTS (type
));
10596 if (!INTEGRAL_TYPE_P (type
)
10597 && !POINTER_TYPE_P (type
)
10598 && TREE_CODE (type
) != OFFSET_TYPE
)
10601 return build_nonstandard_integer_type (TYPE_PRECISION (type
), unsignedp
);
10604 /* If TYPE is an integral or pointer type, return an integer type with
10605 the same precision which is unsigned, or itself if TYPE is already an
10606 unsigned integer type. */
10609 unsigned_type_for (tree type
)
10611 return signed_or_unsigned_type_for (1, type
);
10614 /* If TYPE is an integral or pointer type, return an integer type with
10615 the same precision which is signed, or itself if TYPE is already a
10616 signed integer type. */
10619 signed_type_for (tree type
)
10621 return signed_or_unsigned_type_for (0, type
);
10624 /* If TYPE is a vector type, return a signed integer vector type with the
10625 same width and number of subparts. Otherwise return boolean_type_node. */
10628 truth_type_for (tree type
)
10630 if (TREE_CODE (type
) == VECTOR_TYPE
)
10632 tree elem
= lang_hooks
.types
.type_for_size
10633 (GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (type
))), 0);
10634 return build_opaque_vector_type (elem
, TYPE_VECTOR_SUBPARTS (type
));
10637 return boolean_type_node
;
10640 /* Returns the largest value obtainable by casting something in INNER type to
10644 upper_bound_in_type (tree outer
, tree inner
)
10647 unsigned int det
= 0;
10648 unsigned oprec
= TYPE_PRECISION (outer
);
10649 unsigned iprec
= TYPE_PRECISION (inner
);
10652 /* Compute a unique number for every combination. */
10653 det
|= (oprec
> iprec
) ? 4 : 0;
10654 det
|= TYPE_UNSIGNED (outer
) ? 2 : 0;
10655 det
|= TYPE_UNSIGNED (inner
) ? 1 : 0;
10657 /* Determine the exponent to use. */
10662 /* oprec <= iprec, outer: signed, inner: don't care. */
10667 /* oprec <= iprec, outer: unsigned, inner: don't care. */
10671 /* oprec > iprec, outer: signed, inner: signed. */
10675 /* oprec > iprec, outer: signed, inner: unsigned. */
10679 /* oprec > iprec, outer: unsigned, inner: signed. */
10683 /* oprec > iprec, outer: unsigned, inner: unsigned. */
10687 gcc_unreachable ();
10690 /* Compute 2^^prec - 1. */
10691 if (prec
<= HOST_BITS_PER_WIDE_INT
)
10694 high
.low
= ((~(unsigned HOST_WIDE_INT
) 0)
10695 >> (HOST_BITS_PER_WIDE_INT
- prec
));
10699 high
.high
= ((~(unsigned HOST_WIDE_INT
) 0)
10700 >> (HOST_BITS_PER_DOUBLE_INT
- prec
));
10701 high
.low
= ~(unsigned HOST_WIDE_INT
) 0;
10704 return double_int_to_tree (outer
, high
);
10707 /* Returns the smallest value obtainable by casting something in INNER type to
10711 lower_bound_in_type (tree outer
, tree inner
)
10714 unsigned oprec
= TYPE_PRECISION (outer
);
10715 unsigned iprec
= TYPE_PRECISION (inner
);
10717 /* If OUTER type is unsigned, we can definitely cast 0 to OUTER type
10719 if (TYPE_UNSIGNED (outer
)
10720 /* If we are widening something of an unsigned type, OUTER type
10721 contains all values of INNER type. In particular, both INNER
10722 and OUTER types have zero in common. */
10723 || (oprec
> iprec
&& TYPE_UNSIGNED (inner
)))
10724 low
.low
= low
.high
= 0;
10727 /* If we are widening a signed type to another signed type, we
10728 want to obtain -2^^(iprec-1). If we are keeping the
10729 precision or narrowing to a signed type, we want to obtain
10731 unsigned prec
= oprec
> iprec
? iprec
: oprec
;
10733 if (prec
<= HOST_BITS_PER_WIDE_INT
)
10735 low
.high
= ~(unsigned HOST_WIDE_INT
) 0;
10736 low
.low
= (~(unsigned HOST_WIDE_INT
) 0) << (prec
- 1);
10740 low
.high
= ((~(unsigned HOST_WIDE_INT
) 0)
10741 << (prec
- HOST_BITS_PER_WIDE_INT
- 1));
10746 return double_int_to_tree (outer
, low
);
10749 /* Return nonzero if two operands that are suitable for PHI nodes are
10750 necessarily equal. Specifically, both ARG0 and ARG1 must be either
10751 SSA_NAME or invariant. Note that this is strictly an optimization.
10752 That is, callers of this function can directly call operand_equal_p
10753 and get the same result, only slower. */
10756 operand_equal_for_phi_arg_p (const_tree arg0
, const_tree arg1
)
10760 if (TREE_CODE (arg0
) == SSA_NAME
|| TREE_CODE (arg1
) == SSA_NAME
)
10762 return operand_equal_p (arg0
, arg1
, 0);
10765 /* Returns number of zeros at the end of binary representation of X.
10767 ??? Use ffs if available? */
10770 num_ending_zeros (const_tree x
)
10772 unsigned HOST_WIDE_INT fr
, nfr
;
10773 unsigned num
, abits
;
10774 tree type
= TREE_TYPE (x
);
10776 if (TREE_INT_CST_LOW (x
) == 0)
10778 num
= HOST_BITS_PER_WIDE_INT
;
10779 fr
= TREE_INT_CST_HIGH (x
);
10784 fr
= TREE_INT_CST_LOW (x
);
10787 for (abits
= HOST_BITS_PER_WIDE_INT
/ 2; abits
; abits
/= 2)
10790 if (nfr
<< abits
== fr
)
10797 if (num
> TYPE_PRECISION (type
))
10798 num
= TYPE_PRECISION (type
);
10800 return build_int_cst_type (type
, num
);
10804 #define WALK_SUBTREE(NODE) \
10807 result = walk_tree_1 (&(NODE), func, data, pset, lh); \
10813 /* This is a subroutine of walk_tree that walks field of TYPE that are to
10814 be walked whenever a type is seen in the tree. Rest of operands and return
10815 value are as for walk_tree. */
10818 walk_type_fields (tree type
, walk_tree_fn func
, void *data
,
10819 struct pointer_set_t
*pset
, walk_tree_lh lh
)
10821 tree result
= NULL_TREE
;
10823 switch (TREE_CODE (type
))
10826 case REFERENCE_TYPE
:
10828 /* We have to worry about mutually recursive pointers. These can't
10829 be written in C. They can in Ada. It's pathological, but
10830 there's an ACATS test (c38102a) that checks it. Deal with this
10831 by checking if we're pointing to another pointer, that one
10832 points to another pointer, that one does too, and we have no htab.
10833 If so, get a hash table. We check three levels deep to avoid
10834 the cost of the hash table if we don't need one. */
10835 if (POINTER_TYPE_P (TREE_TYPE (type
))
10836 && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (type
)))
10837 && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (TREE_TYPE (type
))))
10840 result
= walk_tree_without_duplicates (&TREE_TYPE (type
),
10848 /* ... fall through ... */
10851 WALK_SUBTREE (TREE_TYPE (type
));
10855 WALK_SUBTREE (TYPE_METHOD_BASETYPE (type
));
10857 /* Fall through. */
10859 case FUNCTION_TYPE
:
10860 WALK_SUBTREE (TREE_TYPE (type
));
10864 /* We never want to walk into default arguments. */
10865 for (arg
= TYPE_ARG_TYPES (type
); arg
; arg
= TREE_CHAIN (arg
))
10866 WALK_SUBTREE (TREE_VALUE (arg
));
10871 /* Don't follow this nodes's type if a pointer for fear that
10872 we'll have infinite recursion. If we have a PSET, then we
10875 || (!POINTER_TYPE_P (TREE_TYPE (type
))
10876 && TREE_CODE (TREE_TYPE (type
)) != OFFSET_TYPE
))
10877 WALK_SUBTREE (TREE_TYPE (type
));
10878 WALK_SUBTREE (TYPE_DOMAIN (type
));
10882 WALK_SUBTREE (TREE_TYPE (type
));
10883 WALK_SUBTREE (TYPE_OFFSET_BASETYPE (type
));
10893 /* Apply FUNC to all the sub-trees of TP in a pre-order traversal. FUNC is
10894 called with the DATA and the address of each sub-tree. If FUNC returns a
10895 non-NULL value, the traversal is stopped, and the value returned by FUNC
10896 is returned. If PSET is non-NULL it is used to record the nodes visited,
10897 and to avoid visiting a node more than once. */
10900 walk_tree_1 (tree
*tp
, walk_tree_fn func
, void *data
,
10901 struct pointer_set_t
*pset
, walk_tree_lh lh
)
10903 enum tree_code code
;
10907 #define WALK_SUBTREE_TAIL(NODE) \
10911 goto tail_recurse; \
10916 /* Skip empty subtrees. */
10920 /* Don't walk the same tree twice, if the user has requested
10921 that we avoid doing so. */
10922 if (pset
&& pointer_set_insert (pset
, *tp
))
10925 /* Call the function. */
10927 result
= (*func
) (tp
, &walk_subtrees
, data
);
10929 /* If we found something, return it. */
10933 code
= TREE_CODE (*tp
);
10935 /* Even if we didn't, FUNC may have decided that there was nothing
10936 interesting below this point in the tree. */
10937 if (!walk_subtrees
)
10939 /* But we still need to check our siblings. */
10940 if (code
== TREE_LIST
)
10941 WALK_SUBTREE_TAIL (TREE_CHAIN (*tp
));
10942 else if (code
== OMP_CLAUSE
)
10943 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
10950 result
= (*lh
) (tp
, &walk_subtrees
, func
, data
, pset
);
10951 if (result
|| !walk_subtrees
)
10958 case IDENTIFIER_NODE
:
10965 case PLACEHOLDER_EXPR
:
10969 /* None of these have subtrees other than those already walked
10974 WALK_SUBTREE (TREE_VALUE (*tp
));
10975 WALK_SUBTREE_TAIL (TREE_CHAIN (*tp
));
10980 int len
= TREE_VEC_LENGTH (*tp
);
10985 /* Walk all elements but the first. */
10987 WALK_SUBTREE (TREE_VEC_ELT (*tp
, len
));
10989 /* Now walk the first one as a tail call. */
10990 WALK_SUBTREE_TAIL (TREE_VEC_ELT (*tp
, 0));
10994 WALK_SUBTREE (TREE_REALPART (*tp
));
10995 WALK_SUBTREE_TAIL (TREE_IMAGPART (*tp
));
10999 unsigned HOST_WIDE_INT idx
;
11000 constructor_elt
*ce
;
11002 for (idx
= 0; vec_safe_iterate (CONSTRUCTOR_ELTS (*tp
), idx
, &ce
);
11004 WALK_SUBTREE (ce
->value
);
11009 WALK_SUBTREE_TAIL (TREE_OPERAND (*tp
, 0));
11014 for (decl
= BIND_EXPR_VARS (*tp
); decl
; decl
= DECL_CHAIN (decl
))
11016 /* Walk the DECL_INITIAL and DECL_SIZE. We don't want to walk
11017 into declarations that are just mentioned, rather than
11018 declared; they don't really belong to this part of the tree.
11019 And, we can see cycles: the initializer for a declaration
11020 can refer to the declaration itself. */
11021 WALK_SUBTREE (DECL_INITIAL (decl
));
11022 WALK_SUBTREE (DECL_SIZE (decl
));
11023 WALK_SUBTREE (DECL_SIZE_UNIT (decl
));
11025 WALK_SUBTREE_TAIL (BIND_EXPR_BODY (*tp
));
11028 case STATEMENT_LIST
:
11030 tree_stmt_iterator i
;
11031 for (i
= tsi_start (*tp
); !tsi_end_p (i
); tsi_next (&i
))
11032 WALK_SUBTREE (*tsi_stmt_ptr (i
));
11037 switch (OMP_CLAUSE_CODE (*tp
))
11039 case OMP_CLAUSE_PRIVATE
:
11040 case OMP_CLAUSE_SHARED
:
11041 case OMP_CLAUSE_FIRSTPRIVATE
:
11042 case OMP_CLAUSE_COPYIN
:
11043 case OMP_CLAUSE_COPYPRIVATE
:
11044 case OMP_CLAUSE_FINAL
:
11045 case OMP_CLAUSE_IF
:
11046 case OMP_CLAUSE_NUM_THREADS
:
11047 case OMP_CLAUSE_SCHEDULE
:
11048 case OMP_CLAUSE_UNIFORM
:
11049 case OMP_CLAUSE_DEPEND
:
11050 case OMP_CLAUSE_NUM_TEAMS
:
11051 case OMP_CLAUSE_THREAD_LIMIT
:
11052 case OMP_CLAUSE_DEVICE
:
11053 case OMP_CLAUSE_DIST_SCHEDULE
:
11054 case OMP_CLAUSE_SAFELEN
:
11055 case OMP_CLAUSE_SIMDLEN
:
11056 case OMP_CLAUSE__LOOPTEMP_
:
11057 case OMP_CLAUSE__SIMDUID_
:
11058 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, 0));
11061 case OMP_CLAUSE_NOWAIT
:
11062 case OMP_CLAUSE_ORDERED
:
11063 case OMP_CLAUSE_DEFAULT
:
11064 case OMP_CLAUSE_UNTIED
:
11065 case OMP_CLAUSE_MERGEABLE
:
11066 case OMP_CLAUSE_PROC_BIND
:
11067 case OMP_CLAUSE_INBRANCH
:
11068 case OMP_CLAUSE_NOTINBRANCH
:
11069 case OMP_CLAUSE_FOR
:
11070 case OMP_CLAUSE_PARALLEL
:
11071 case OMP_CLAUSE_SECTIONS
:
11072 case OMP_CLAUSE_TASKGROUP
:
11073 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
11075 case OMP_CLAUSE_LASTPRIVATE
:
11076 WALK_SUBTREE (OMP_CLAUSE_DECL (*tp
));
11077 WALK_SUBTREE (OMP_CLAUSE_LASTPRIVATE_STMT (*tp
));
11078 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
11080 case OMP_CLAUSE_COLLAPSE
:
11083 for (i
= 0; i
< 3; i
++)
11084 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, i
));
11085 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
11088 case OMP_CLAUSE_LINEAR
:
11089 WALK_SUBTREE (OMP_CLAUSE_DECL (*tp
));
11090 WALK_SUBTREE (OMP_CLAUSE_LINEAR_STEP (*tp
));
11091 WALK_SUBTREE (OMP_CLAUSE_LINEAR_STMT (*tp
));
11092 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
11094 case OMP_CLAUSE_ALIGNED
:
11095 case OMP_CLAUSE_FROM
:
11096 case OMP_CLAUSE_TO
:
11097 case OMP_CLAUSE_MAP
:
11098 WALK_SUBTREE (OMP_CLAUSE_DECL (*tp
));
11099 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, 1));
11100 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
11102 case OMP_CLAUSE_REDUCTION
:
11105 for (i
= 0; i
< 4; i
++)
11106 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, i
));
11107 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
11111 gcc_unreachable ();
11119 /* TARGET_EXPRs are peculiar: operands 1 and 3 can be the same.
11120 But, we only want to walk once. */
11121 len
= (TREE_OPERAND (*tp
, 3) == TREE_OPERAND (*tp
, 1)) ? 2 : 3;
11122 for (i
= 0; i
< len
; ++i
)
11123 WALK_SUBTREE (TREE_OPERAND (*tp
, i
));
11124 WALK_SUBTREE_TAIL (TREE_OPERAND (*tp
, len
));
11128 /* If this is a TYPE_DECL, walk into the fields of the type that it's
11129 defining. We only want to walk into these fields of a type in this
11130 case and not in the general case of a mere reference to the type.
11132 The criterion is as follows: if the field can be an expression, it
11133 must be walked only here. This should be in keeping with the fields
11134 that are directly gimplified in gimplify_type_sizes in order for the
11135 mark/copy-if-shared/unmark machinery of the gimplifier to work with
11136 variable-sized types.
11138 Note that DECLs get walked as part of processing the BIND_EXPR. */
11139 if (TREE_CODE (DECL_EXPR_DECL (*tp
)) == TYPE_DECL
)
11141 tree
*type_p
= &TREE_TYPE (DECL_EXPR_DECL (*tp
));
11142 if (TREE_CODE (*type_p
) == ERROR_MARK
)
11145 /* Call the function for the type. See if it returns anything or
11146 doesn't want us to continue. If we are to continue, walk both
11147 the normal fields and those for the declaration case. */
11148 result
= (*func
) (type_p
, &walk_subtrees
, data
);
11149 if (result
|| !walk_subtrees
)
11152 /* But do not walk a pointed-to type since it may itself need to
11153 be walked in the declaration case if it isn't anonymous. */
11154 if (!POINTER_TYPE_P (*type_p
))
11156 result
= walk_type_fields (*type_p
, func
, data
, pset
, lh
);
11161 /* If this is a record type, also walk the fields. */
11162 if (RECORD_OR_UNION_TYPE_P (*type_p
))
11166 for (field
= TYPE_FIELDS (*type_p
); field
;
11167 field
= DECL_CHAIN (field
))
11169 /* We'd like to look at the type of the field, but we can
11170 easily get infinite recursion. So assume it's pointed
11171 to elsewhere in the tree. Also, ignore things that
11173 if (TREE_CODE (field
) != FIELD_DECL
)
11176 WALK_SUBTREE (DECL_FIELD_OFFSET (field
));
11177 WALK_SUBTREE (DECL_SIZE (field
));
11178 WALK_SUBTREE (DECL_SIZE_UNIT (field
));
11179 if (TREE_CODE (*type_p
) == QUAL_UNION_TYPE
)
11180 WALK_SUBTREE (DECL_QUALIFIER (field
));
11184 /* Same for scalar types. */
11185 else if (TREE_CODE (*type_p
) == BOOLEAN_TYPE
11186 || TREE_CODE (*type_p
) == ENUMERAL_TYPE
11187 || TREE_CODE (*type_p
) == INTEGER_TYPE
11188 || TREE_CODE (*type_p
) == FIXED_POINT_TYPE
11189 || TREE_CODE (*type_p
) == REAL_TYPE
)
11191 WALK_SUBTREE (TYPE_MIN_VALUE (*type_p
));
11192 WALK_SUBTREE (TYPE_MAX_VALUE (*type_p
));
11195 WALK_SUBTREE (TYPE_SIZE (*type_p
));
11196 WALK_SUBTREE_TAIL (TYPE_SIZE_UNIT (*type_p
));
11201 if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code
)))
11205 /* Walk over all the sub-trees of this operand. */
11206 len
= TREE_OPERAND_LENGTH (*tp
);
11208 /* Go through the subtrees. We need to do this in forward order so
11209 that the scope of a FOR_EXPR is handled properly. */
11212 for (i
= 0; i
< len
- 1; ++i
)
11213 WALK_SUBTREE (TREE_OPERAND (*tp
, i
));
11214 WALK_SUBTREE_TAIL (TREE_OPERAND (*tp
, len
- 1));
11217 /* If this is a type, walk the needed fields in the type. */
11218 else if (TYPE_P (*tp
))
11219 return walk_type_fields (*tp
, func
, data
, pset
, lh
);
11223 /* We didn't find what we were looking for. */
11226 #undef WALK_SUBTREE_TAIL
11228 #undef WALK_SUBTREE
11230 /* Like walk_tree, but does not walk duplicate nodes more than once. */
11233 walk_tree_without_duplicates_1 (tree
*tp
, walk_tree_fn func
, void *data
,
11237 struct pointer_set_t
*pset
;
11239 pset
= pointer_set_create ();
11240 result
= walk_tree_1 (tp
, func
, data
, pset
, lh
);
11241 pointer_set_destroy (pset
);
11247 tree_block (tree t
)
11249 char const c
= TREE_CODE_CLASS (TREE_CODE (t
));
11251 if (IS_EXPR_CODE_CLASS (c
))
11252 return LOCATION_BLOCK (t
->exp
.locus
);
11253 gcc_unreachable ();
11258 tree_set_block (tree t
, tree b
)
11260 char const c
= TREE_CODE_CLASS (TREE_CODE (t
));
11262 if (IS_EXPR_CODE_CLASS (c
))
11265 t
->exp
.locus
= COMBINE_LOCATION_DATA (line_table
, t
->exp
.locus
, b
);
11267 t
->exp
.locus
= LOCATION_LOCUS (t
->exp
.locus
);
11270 gcc_unreachable ();
11273 /* Create a nameless artificial label and put it in the current
11274 function context. The label has a location of LOC. Returns the
11275 newly created label. */
11278 create_artificial_label (location_t loc
)
11280 tree lab
= build_decl (loc
,
11281 LABEL_DECL
, NULL_TREE
, void_type_node
);
11283 DECL_ARTIFICIAL (lab
) = 1;
11284 DECL_IGNORED_P (lab
) = 1;
11285 DECL_CONTEXT (lab
) = current_function_decl
;
11289 /* Given a tree, try to return a useful variable name that we can use
11290 to prefix a temporary that is being assigned the value of the tree.
11291 I.E. given <temp> = &A, return A. */
11296 tree stripped_decl
;
11299 STRIP_NOPS (stripped_decl
);
11300 if (DECL_P (stripped_decl
) && DECL_NAME (stripped_decl
))
11301 return IDENTIFIER_POINTER (DECL_NAME (stripped_decl
));
11302 else if (TREE_CODE (stripped_decl
) == SSA_NAME
)
11304 tree name
= SSA_NAME_IDENTIFIER (stripped_decl
);
11307 return IDENTIFIER_POINTER (name
);
11311 switch (TREE_CODE (stripped_decl
))
11314 return get_name (TREE_OPERAND (stripped_decl
, 0));
11321 /* Return true if TYPE has a variable argument list. */
11324 stdarg_p (const_tree fntype
)
11326 function_args_iterator args_iter
;
11327 tree n
= NULL_TREE
, t
;
11332 FOREACH_FUNCTION_ARGS (fntype
, t
, args_iter
)
11337 return n
!= NULL_TREE
&& n
!= void_type_node
;
11340 /* Return true if TYPE has a prototype. */
11343 prototype_p (tree fntype
)
11347 gcc_assert (fntype
!= NULL_TREE
);
11349 t
= TYPE_ARG_TYPES (fntype
);
11350 return (t
!= NULL_TREE
);
11353 /* If BLOCK is inlined from an __attribute__((__artificial__))
11354 routine, return pointer to location from where it has been
11357 block_nonartificial_location (tree block
)
11359 location_t
*ret
= NULL
;
11361 while (block
&& TREE_CODE (block
) == BLOCK
11362 && BLOCK_ABSTRACT_ORIGIN (block
))
11364 tree ao
= BLOCK_ABSTRACT_ORIGIN (block
);
11366 while (TREE_CODE (ao
) == BLOCK
11367 && BLOCK_ABSTRACT_ORIGIN (ao
)
11368 && BLOCK_ABSTRACT_ORIGIN (ao
) != ao
)
11369 ao
= BLOCK_ABSTRACT_ORIGIN (ao
);
11371 if (TREE_CODE (ao
) == FUNCTION_DECL
)
11373 /* If AO is an artificial inline, point RET to the
11374 call site locus at which it has been inlined and continue
11375 the loop, in case AO's caller is also an artificial
11377 if (DECL_DECLARED_INLINE_P (ao
)
11378 && lookup_attribute ("artificial", DECL_ATTRIBUTES (ao
)))
11379 ret
= &BLOCK_SOURCE_LOCATION (block
);
11383 else if (TREE_CODE (ao
) != BLOCK
)
11386 block
= BLOCK_SUPERCONTEXT (block
);
11392 /* If EXP is inlined from an __attribute__((__artificial__))
11393 function, return the location of the original call expression. */
11396 tree_nonartificial_location (tree exp
)
11398 location_t
*loc
= block_nonartificial_location (TREE_BLOCK (exp
));
11403 return EXPR_LOCATION (exp
);
11407 /* These are the hash table functions for the hash table of OPTIMIZATION_NODEq
11410 /* Return the hash code code X, an OPTIMIZATION_NODE or TARGET_OPTION code. */
11413 cl_option_hash_hash (const void *x
)
11415 const_tree
const t
= (const_tree
) x
;
11419 hashval_t hash
= 0;
11421 if (TREE_CODE (t
) == OPTIMIZATION_NODE
)
11423 p
= (const char *)TREE_OPTIMIZATION (t
);
11424 len
= sizeof (struct cl_optimization
);
11427 else if (TREE_CODE (t
) == TARGET_OPTION_NODE
)
11429 p
= (const char *)TREE_TARGET_OPTION (t
);
11430 len
= sizeof (struct cl_target_option
);
11434 gcc_unreachable ();
11436 /* assume most opt flags are just 0/1, some are 2-3, and a few might be
11438 for (i
= 0; i
< len
; i
++)
11440 hash
= (hash
<< 4) ^ ((i
<< 2) | p
[i
]);
11445 /* Return nonzero if the value represented by *X (an OPTIMIZATION or
11446 TARGET_OPTION tree node) is the same as that given by *Y, which is the
11450 cl_option_hash_eq (const void *x
, const void *y
)
11452 const_tree
const xt
= (const_tree
) x
;
11453 const_tree
const yt
= (const_tree
) y
;
11458 if (TREE_CODE (xt
) != TREE_CODE (yt
))
11461 if (TREE_CODE (xt
) == OPTIMIZATION_NODE
)
11463 xp
= (const char *)TREE_OPTIMIZATION (xt
);
11464 yp
= (const char *)TREE_OPTIMIZATION (yt
);
11465 len
= sizeof (struct cl_optimization
);
11468 else if (TREE_CODE (xt
) == TARGET_OPTION_NODE
)
11470 xp
= (const char *)TREE_TARGET_OPTION (xt
);
11471 yp
= (const char *)TREE_TARGET_OPTION (yt
);
11472 len
= sizeof (struct cl_target_option
);
11476 gcc_unreachable ();
11478 return (memcmp (xp
, yp
, len
) == 0);
11481 /* Build an OPTIMIZATION_NODE based on the options in OPTS. */
11484 build_optimization_node (struct gcc_options
*opts
)
11489 /* Use the cache of optimization nodes. */
11491 cl_optimization_save (TREE_OPTIMIZATION (cl_optimization_node
),
11494 slot
= htab_find_slot (cl_option_hash_table
, cl_optimization_node
, INSERT
);
11498 /* Insert this one into the hash table. */
11499 t
= cl_optimization_node
;
11502 /* Make a new node for next time round. */
11503 cl_optimization_node
= make_node (OPTIMIZATION_NODE
);
11509 /* Build a TARGET_OPTION_NODE based on the options in OPTS. */
11512 build_target_option_node (struct gcc_options
*opts
)
11517 /* Use the cache of optimization nodes. */
11519 cl_target_option_save (TREE_TARGET_OPTION (cl_target_option_node
),
11522 slot
= htab_find_slot (cl_option_hash_table
, cl_target_option_node
, INSERT
);
11526 /* Insert this one into the hash table. */
11527 t
= cl_target_option_node
;
11530 /* Make a new node for next time round. */
11531 cl_target_option_node
= make_node (TARGET_OPTION_NODE
);
11537 /* Reset TREE_TARGET_GLOBALS cache for TARGET_OPTION_NODE.
11538 Called through htab_traverse. */
11541 prepare_target_option_node_for_pch (void **slot
, void *)
11543 tree node
= (tree
) *slot
;
11544 if (TREE_CODE (node
) == TARGET_OPTION_NODE
)
11545 TREE_TARGET_GLOBALS (node
) = NULL
;
11549 /* Clear TREE_TARGET_GLOBALS of all TARGET_OPTION_NODE trees,
11550 so that they aren't saved during PCH writing. */
11553 prepare_target_option_nodes_for_pch (void)
11555 htab_traverse (cl_option_hash_table
, prepare_target_option_node_for_pch
,
11559 /* Determine the "ultimate origin" of a block. The block may be an inlined
11560 instance of an inlined instance of a block which is local to an inline
11561 function, so we have to trace all of the way back through the origin chain
11562 to find out what sort of node actually served as the original seed for the
11566 block_ultimate_origin (const_tree block
)
11568 tree immediate_origin
= BLOCK_ABSTRACT_ORIGIN (block
);
11570 /* output_inline_function sets BLOCK_ABSTRACT_ORIGIN for all the
11571 nodes in the function to point to themselves; ignore that if
11572 we're trying to output the abstract instance of this function. */
11573 if (BLOCK_ABSTRACT (block
) && immediate_origin
== block
)
11576 if (immediate_origin
== NULL_TREE
)
11581 tree lookahead
= immediate_origin
;
11585 ret_val
= lookahead
;
11586 lookahead
= (TREE_CODE (ret_val
) == BLOCK
11587 ? BLOCK_ABSTRACT_ORIGIN (ret_val
) : NULL
);
11589 while (lookahead
!= NULL
&& lookahead
!= ret_val
);
11591 /* The block's abstract origin chain may not be the *ultimate* origin of
11592 the block. It could lead to a DECL that has an abstract origin set.
11593 If so, we want that DECL's abstract origin (which is what DECL_ORIGIN
11594 will give us if it has one). Note that DECL's abstract origins are
11595 supposed to be the most distant ancestor (or so decl_ultimate_origin
11596 claims), so we don't need to loop following the DECL origins. */
11597 if (DECL_P (ret_val
))
11598 return DECL_ORIGIN (ret_val
);
11604 /* Return true iff conversion in EXP generates no instruction. Mark
11605 it inline so that we fully inline into the stripping functions even
11606 though we have two uses of this function. */
11609 tree_nop_conversion (const_tree exp
)
11611 tree outer_type
, inner_type
;
11613 if (!CONVERT_EXPR_P (exp
)
11614 && TREE_CODE (exp
) != NON_LVALUE_EXPR
)
11616 if (TREE_OPERAND (exp
, 0) == error_mark_node
)
11619 outer_type
= TREE_TYPE (exp
);
11620 inner_type
= TREE_TYPE (TREE_OPERAND (exp
, 0));
11625 /* Use precision rather then machine mode when we can, which gives
11626 the correct answer even for submode (bit-field) types. */
11627 if ((INTEGRAL_TYPE_P (outer_type
)
11628 || POINTER_TYPE_P (outer_type
)
11629 || TREE_CODE (outer_type
) == OFFSET_TYPE
)
11630 && (INTEGRAL_TYPE_P (inner_type
)
11631 || POINTER_TYPE_P (inner_type
)
11632 || TREE_CODE (inner_type
) == OFFSET_TYPE
))
11633 return TYPE_PRECISION (outer_type
) == TYPE_PRECISION (inner_type
);
11635 /* Otherwise fall back on comparing machine modes (e.g. for
11636 aggregate types, floats). */
11637 return TYPE_MODE (outer_type
) == TYPE_MODE (inner_type
);
11640 /* Return true iff conversion in EXP generates no instruction. Don't
11641 consider conversions changing the signedness. */
11644 tree_sign_nop_conversion (const_tree exp
)
11646 tree outer_type
, inner_type
;
11648 if (!tree_nop_conversion (exp
))
11651 outer_type
= TREE_TYPE (exp
);
11652 inner_type
= TREE_TYPE (TREE_OPERAND (exp
, 0));
11654 return (TYPE_UNSIGNED (outer_type
) == TYPE_UNSIGNED (inner_type
)
11655 && POINTER_TYPE_P (outer_type
) == POINTER_TYPE_P (inner_type
));
11658 /* Strip conversions from EXP according to tree_nop_conversion and
11659 return the resulting expression. */
11662 tree_strip_nop_conversions (tree exp
)
11664 while (tree_nop_conversion (exp
))
11665 exp
= TREE_OPERAND (exp
, 0);
11669 /* Strip conversions from EXP according to tree_sign_nop_conversion
11670 and return the resulting expression. */
11673 tree_strip_sign_nop_conversions (tree exp
)
11675 while (tree_sign_nop_conversion (exp
))
11676 exp
= TREE_OPERAND (exp
, 0);
11680 /* Avoid any floating point extensions from EXP. */
11682 strip_float_extensions (tree exp
)
11684 tree sub
, expt
, subt
;
11686 /* For floating point constant look up the narrowest type that can hold
11687 it properly and handle it like (type)(narrowest_type)constant.
11688 This way we can optimize for instance a=a*2.0 where "a" is float
11689 but 2.0 is double constant. */
11690 if (TREE_CODE (exp
) == REAL_CST
&& !DECIMAL_FLOAT_TYPE_P (TREE_TYPE (exp
)))
11692 REAL_VALUE_TYPE orig
;
11695 orig
= TREE_REAL_CST (exp
);
11696 if (TYPE_PRECISION (TREE_TYPE (exp
)) > TYPE_PRECISION (float_type_node
)
11697 && exact_real_truncate (TYPE_MODE (float_type_node
), &orig
))
11698 type
= float_type_node
;
11699 else if (TYPE_PRECISION (TREE_TYPE (exp
))
11700 > TYPE_PRECISION (double_type_node
)
11701 && exact_real_truncate (TYPE_MODE (double_type_node
), &orig
))
11702 type
= double_type_node
;
11704 return build_real (type
, real_value_truncate (TYPE_MODE (type
), orig
));
11707 if (!CONVERT_EXPR_P (exp
))
11710 sub
= TREE_OPERAND (exp
, 0);
11711 subt
= TREE_TYPE (sub
);
11712 expt
= TREE_TYPE (exp
);
11714 if (!FLOAT_TYPE_P (subt
))
11717 if (DECIMAL_FLOAT_TYPE_P (expt
) != DECIMAL_FLOAT_TYPE_P (subt
))
11720 if (TYPE_PRECISION (subt
) > TYPE_PRECISION (expt
))
11723 return strip_float_extensions (sub
);
11726 /* Strip out all handled components that produce invariant
11730 strip_invariant_refs (const_tree op
)
11732 while (handled_component_p (op
))
11734 switch (TREE_CODE (op
))
11737 case ARRAY_RANGE_REF
:
11738 if (!is_gimple_constant (TREE_OPERAND (op
, 1))
11739 || TREE_OPERAND (op
, 2) != NULL_TREE
11740 || TREE_OPERAND (op
, 3) != NULL_TREE
)
11744 case COMPONENT_REF
:
11745 if (TREE_OPERAND (op
, 2) != NULL_TREE
)
11751 op
= TREE_OPERAND (op
, 0);
11757 static GTY(()) tree gcc_eh_personality_decl
;
11759 /* Return the GCC personality function decl. */
11762 lhd_gcc_personality (void)
11764 if (!gcc_eh_personality_decl
)
11765 gcc_eh_personality_decl
= build_personality_function ("gcc");
11766 return gcc_eh_personality_decl
;
11769 /* For languages with One Definition Rule, work out if
11770 trees are actually the same even if the tree representation
11771 differs. This handles only decls appearing in TYPE_NAME
11772 and TYPE_CONTEXT. That is NAMESPACE_DECL, TYPE_DECL,
11773 RECORD_TYPE and IDENTIFIER_NODE. */
11776 same_for_odr (tree t1
, tree t2
)
11782 /* C and C++ FEs differ by using IDENTIFIER_NODE and TYPE_DECL. */
11783 if (TREE_CODE (t1
) == IDENTIFIER_NODE
11784 && TREE_CODE (t2
) == TYPE_DECL
11785 && DECL_FILE_SCOPE_P (t1
))
11787 t2
= DECL_NAME (t2
);
11788 gcc_assert (TREE_CODE (t2
) == IDENTIFIER_NODE
);
11790 if (TREE_CODE (t2
) == IDENTIFIER_NODE
11791 && TREE_CODE (t1
) == TYPE_DECL
11792 && DECL_FILE_SCOPE_P (t2
))
11794 t1
= DECL_NAME (t1
);
11795 gcc_assert (TREE_CODE (t1
) == IDENTIFIER_NODE
);
11797 if (TREE_CODE (t1
) != TREE_CODE (t2
))
11800 return types_same_for_odr (t1
, t2
);
11802 return decls_same_for_odr (t1
, t2
);
11806 /* For languages with One Definition Rule, work out if
11807 decls are actually the same even if the tree representation
11808 differs. This handles only decls appearing in TYPE_NAME
11809 and TYPE_CONTEXT. That is NAMESPACE_DECL, TYPE_DECL,
11810 RECORD_TYPE and IDENTIFIER_NODE. */
11813 decls_same_for_odr (tree decl1
, tree decl2
)
11815 if (decl1
&& TREE_CODE (decl1
) == TYPE_DECL
11816 && DECL_ORIGINAL_TYPE (decl1
))
11817 decl1
= DECL_ORIGINAL_TYPE (decl1
);
11818 if (decl2
&& TREE_CODE (decl2
) == TYPE_DECL
11819 && DECL_ORIGINAL_TYPE (decl2
))
11820 decl2
= DECL_ORIGINAL_TYPE (decl2
);
11821 if (decl1
== decl2
)
11823 if (!decl1
|| !decl2
)
11825 gcc_checking_assert (DECL_P (decl1
) && DECL_P (decl2
));
11826 if (TREE_CODE (decl1
) != TREE_CODE (decl2
))
11828 if (TREE_CODE (decl1
) == TRANSLATION_UNIT_DECL
)
11830 if (TREE_CODE (decl1
) != NAMESPACE_DECL
11831 && TREE_CODE (decl1
) != TYPE_DECL
)
11833 if (!DECL_NAME (decl1
))
11835 gcc_checking_assert (TREE_CODE (DECL_NAME (decl1
)) == IDENTIFIER_NODE
);
11836 gcc_checking_assert (!DECL_NAME (decl2
)
11837 || TREE_CODE (DECL_NAME (decl2
)) == IDENTIFIER_NODE
);
11838 if (DECL_NAME (decl1
) != DECL_NAME (decl2
))
11840 return same_for_odr (DECL_CONTEXT (decl1
),
11841 DECL_CONTEXT (decl2
));
11844 /* For languages with One Definition Rule, work out if
11845 types are same even if the tree representation differs.
11846 This is non-trivial for LTO where minnor differences in
11847 the type representation may have prevented type merging
11848 to merge two copies of otherwise equivalent type. */
11851 types_same_for_odr (tree type1
, tree type2
)
11853 gcc_checking_assert (TYPE_P (type1
) && TYPE_P (type2
));
11854 type1
= TYPE_MAIN_VARIANT (type1
);
11855 type2
= TYPE_MAIN_VARIANT (type2
);
11856 if (type1
== type2
)
11859 #ifndef ENABLE_CHECKING
11864 /* Check for anonymous namespaces. Those have !TREE_PUBLIC
11865 on the corresponding TYPE_STUB_DECL. */
11866 if (type_in_anonymous_namespace_p (type1
)
11867 || type_in_anonymous_namespace_p (type2
))
11869 /* When assembler name of virtual table is available, it is
11870 easy to compare types for equivalence. */
11871 if (TYPE_BINFO (type1
) && TYPE_BINFO (type2
)
11872 && BINFO_VTABLE (TYPE_BINFO (type1
))
11873 && BINFO_VTABLE (TYPE_BINFO (type2
)))
11875 tree v1
= BINFO_VTABLE (TYPE_BINFO (type1
));
11876 tree v2
= BINFO_VTABLE (TYPE_BINFO (type2
));
11878 if (TREE_CODE (v1
) == POINTER_PLUS_EXPR
)
11880 if (TREE_CODE (v2
) != POINTER_PLUS_EXPR
11881 || !operand_equal_p (TREE_OPERAND (v1
, 1),
11882 TREE_OPERAND (v2
, 1), 0))
11884 v1
= TREE_OPERAND (TREE_OPERAND (v1
, 0), 0);
11885 v2
= TREE_OPERAND (TREE_OPERAND (v2
, 0), 0);
11887 v1
= DECL_ASSEMBLER_NAME (v1
);
11888 v2
= DECL_ASSEMBLER_NAME (v2
);
11892 /* FIXME: the code comparing type names consider all instantiations of the
11893 same template to have same name. This is because we have no access
11894 to template parameters. For types with no virtual method tables
11895 we thus can return false positives. At the moment we do not need
11896 to compare types in other scenarios than devirtualization. */
11898 /* If types are not structuraly same, do not bother to contnue.
11899 Match in the remainder of code would mean ODR violation. */
11900 if (!types_compatible_p (type1
, type2
))
11902 if (!TYPE_NAME (type1
))
11904 if (!decls_same_for_odr (TYPE_NAME (type1
), TYPE_NAME (type2
)))
11906 if (!same_for_odr (TYPE_CONTEXT (type1
), TYPE_CONTEXT (type2
)))
11908 /* When not in LTO the MAIN_VARIANT check should be the same. */
11909 gcc_assert (in_lto_p
);
11914 /* TARGET is a call target of GIMPLE call statement
11915 (obtained by gimple_call_fn). Return true if it is
11916 OBJ_TYPE_REF representing an virtual call of C++ method.
11917 (As opposed to OBJ_TYPE_REF representing objc calls
11918 through a cast where middle-end devirtualization machinery
11922 virtual_method_call_p (tree target
)
11924 if (TREE_CODE (target
) != OBJ_TYPE_REF
)
11926 target
= TREE_TYPE (target
);
11927 gcc_checking_assert (TREE_CODE (target
) == POINTER_TYPE
);
11928 target
= TREE_TYPE (target
);
11929 if (TREE_CODE (target
) == FUNCTION_TYPE
)
11931 gcc_checking_assert (TREE_CODE (target
) == METHOD_TYPE
);
11935 /* REF is OBJ_TYPE_REF, return the class the ref corresponds to. */
11938 obj_type_ref_class (tree ref
)
11940 gcc_checking_assert (TREE_CODE (ref
) == OBJ_TYPE_REF
);
11941 ref
= TREE_TYPE (ref
);
11942 gcc_checking_assert (TREE_CODE (ref
) == POINTER_TYPE
);
11943 ref
= TREE_TYPE (ref
);
11944 /* We look for type THIS points to. ObjC also builds
11945 OBJ_TYPE_REF with non-method calls, Their first parameter
11946 ID however also corresponds to class type. */
11947 gcc_checking_assert (TREE_CODE (ref
) == METHOD_TYPE
11948 || TREE_CODE (ref
) == FUNCTION_TYPE
);
11949 ref
= TREE_VALUE (TYPE_ARG_TYPES (ref
));
11950 gcc_checking_assert (TREE_CODE (ref
) == POINTER_TYPE
);
11951 return TREE_TYPE (ref
);
11954 /* Return true if T is in anonymous namespace. */
11957 type_in_anonymous_namespace_p (tree t
)
11959 return (TYPE_STUB_DECL (t
) && !TREE_PUBLIC (TYPE_STUB_DECL (t
)));
11962 /* Try to find a base info of BINFO that would have its field decl at offset
11963 OFFSET within the BINFO type and which is of EXPECTED_TYPE. If it can be
11964 found, return, otherwise return NULL_TREE. */
11967 get_binfo_at_offset (tree binfo
, HOST_WIDE_INT offset
, tree expected_type
)
11969 tree type
= BINFO_TYPE (binfo
);
11973 HOST_WIDE_INT pos
, size
;
11977 if (types_same_for_odr (type
, expected_type
))
11982 for (fld
= TYPE_FIELDS (type
); fld
; fld
= DECL_CHAIN (fld
))
11984 if (TREE_CODE (fld
) != FIELD_DECL
)
11987 pos
= int_bit_position (fld
);
11988 size
= tree_to_uhwi (DECL_SIZE (fld
));
11989 if (pos
<= offset
&& (pos
+ size
) > offset
)
11992 if (!fld
|| TREE_CODE (TREE_TYPE (fld
)) != RECORD_TYPE
)
11995 if (!DECL_ARTIFICIAL (fld
))
11997 binfo
= TYPE_BINFO (TREE_TYPE (fld
));
12001 /* Offset 0 indicates the primary base, whose vtable contents are
12002 represented in the binfo for the derived class. */
12003 else if (offset
!= 0)
12005 tree base_binfo
, binfo2
= binfo
;
12007 /* Find BINFO corresponding to FLD. This is bit harder
12008 by a fact that in virtual inheritance we may need to walk down
12009 the non-virtual inheritance chain. */
12012 tree containing_binfo
= NULL
, found_binfo
= NULL
;
12013 for (i
= 0; BINFO_BASE_ITERATE (binfo2
, i
, base_binfo
); i
++)
12014 if (types_same_for_odr (TREE_TYPE (base_binfo
), TREE_TYPE (fld
)))
12016 found_binfo
= base_binfo
;
12020 if ((tree_to_shwi (BINFO_OFFSET (base_binfo
))
12021 - tree_to_shwi (BINFO_OFFSET (binfo
)))
12022 * BITS_PER_UNIT
< pos
12023 /* Rule out types with no virtual methods or we can get confused
12024 here by zero sized bases. */
12025 && BINFO_VTABLE (TYPE_BINFO (BINFO_TYPE (base_binfo
)))
12026 && (!containing_binfo
12027 || (tree_to_shwi (BINFO_OFFSET (containing_binfo
))
12028 < tree_to_shwi (BINFO_OFFSET (base_binfo
)))))
12029 containing_binfo
= base_binfo
;
12032 binfo
= found_binfo
;
12035 if (!containing_binfo
)
12037 binfo2
= containing_binfo
;
12041 type
= TREE_TYPE (fld
);
12046 /* Returns true if X is a typedef decl. */
12049 is_typedef_decl (tree x
)
12051 return (x
&& TREE_CODE (x
) == TYPE_DECL
12052 && DECL_ORIGINAL_TYPE (x
) != NULL_TREE
);
12055 /* Returns true iff TYPE is a type variant created for a typedef. */
12058 typedef_variant_p (tree type
)
12060 return is_typedef_decl (TYPE_NAME (type
));
12063 /* Warn about a use of an identifier which was marked deprecated. */
12065 warn_deprecated_use (tree node
, tree attr
)
12069 if (node
== 0 || !warn_deprecated_decl
)
12075 attr
= DECL_ATTRIBUTES (node
);
12076 else if (TYPE_P (node
))
12078 tree decl
= TYPE_STUB_DECL (node
);
12080 attr
= lookup_attribute ("deprecated",
12081 TYPE_ATTRIBUTES (TREE_TYPE (decl
)));
12086 attr
= lookup_attribute ("deprecated", attr
);
12089 msg
= TREE_STRING_POINTER (TREE_VALUE (TREE_VALUE (attr
)));
12095 expanded_location xloc
= expand_location (DECL_SOURCE_LOCATION (node
));
12097 warning (OPT_Wdeprecated_declarations
,
12098 "%qD is deprecated (declared at %r%s:%d%R): %s",
12099 node
, "locus", xloc
.file
, xloc
.line
, msg
);
12101 warning (OPT_Wdeprecated_declarations
,
12102 "%qD is deprecated (declared at %r%s:%d%R)",
12103 node
, "locus", xloc
.file
, xloc
.line
);
12105 else if (TYPE_P (node
))
12107 tree what
= NULL_TREE
;
12108 tree decl
= TYPE_STUB_DECL (node
);
12110 if (TYPE_NAME (node
))
12112 if (TREE_CODE (TYPE_NAME (node
)) == IDENTIFIER_NODE
)
12113 what
= TYPE_NAME (node
);
12114 else if (TREE_CODE (TYPE_NAME (node
)) == TYPE_DECL
12115 && DECL_NAME (TYPE_NAME (node
)))
12116 what
= DECL_NAME (TYPE_NAME (node
));
12121 expanded_location xloc
12122 = expand_location (DECL_SOURCE_LOCATION (decl
));
12126 warning (OPT_Wdeprecated_declarations
,
12127 "%qE is deprecated (declared at %r%s:%d%R): %s",
12128 what
, "locus", xloc
.file
, xloc
.line
, msg
);
12130 warning (OPT_Wdeprecated_declarations
,
12131 "%qE is deprecated (declared at %r%s:%d%R)",
12132 what
, "locus", xloc
.file
, xloc
.line
);
12137 warning (OPT_Wdeprecated_declarations
,
12138 "type is deprecated (declared at %r%s:%d%R): %s",
12139 "locus", xloc
.file
, xloc
.line
, msg
);
12141 warning (OPT_Wdeprecated_declarations
,
12142 "type is deprecated (declared at %r%s:%d%R)",
12143 "locus", xloc
.file
, xloc
.line
);
12151 warning (OPT_Wdeprecated_declarations
, "%qE is deprecated: %s",
12154 warning (OPT_Wdeprecated_declarations
, "%qE is deprecated", what
);
12159 warning (OPT_Wdeprecated_declarations
, "type is deprecated: %s",
12162 warning (OPT_Wdeprecated_declarations
, "type is deprecated");
12168 /* Return true if REF has a COMPONENT_REF with a bit-field field declaration
12169 somewhere in it. */
12172 contains_bitfld_component_ref_p (const_tree ref
)
12174 while (handled_component_p (ref
))
12176 if (TREE_CODE (ref
) == COMPONENT_REF
12177 && DECL_BIT_FIELD (TREE_OPERAND (ref
, 1)))
12179 ref
= TREE_OPERAND (ref
, 0);
12185 /* Try to determine whether a TRY_CATCH expression can fall through.
12186 This is a subroutine of block_may_fallthru. */
12189 try_catch_may_fallthru (const_tree stmt
)
12191 tree_stmt_iterator i
;
12193 /* If the TRY block can fall through, the whole TRY_CATCH can
12195 if (block_may_fallthru (TREE_OPERAND (stmt
, 0)))
12198 i
= tsi_start (TREE_OPERAND (stmt
, 1));
12199 switch (TREE_CODE (tsi_stmt (i
)))
12202 /* We expect to see a sequence of CATCH_EXPR trees, each with a
12203 catch expression and a body. The whole TRY_CATCH may fall
12204 through iff any of the catch bodies falls through. */
12205 for (; !tsi_end_p (i
); tsi_next (&i
))
12207 if (block_may_fallthru (CATCH_BODY (tsi_stmt (i
))))
12212 case EH_FILTER_EXPR
:
12213 /* The exception filter expression only matters if there is an
12214 exception. If the exception does not match EH_FILTER_TYPES,
12215 we will execute EH_FILTER_FAILURE, and we will fall through
12216 if that falls through. If the exception does match
12217 EH_FILTER_TYPES, the stack unwinder will continue up the
12218 stack, so we will not fall through. We don't know whether we
12219 will throw an exception which matches EH_FILTER_TYPES or not,
12220 so we just ignore EH_FILTER_TYPES and assume that we might
12221 throw an exception which doesn't match. */
12222 return block_may_fallthru (EH_FILTER_FAILURE (tsi_stmt (i
)));
12225 /* This case represents statements to be executed when an
12226 exception occurs. Those statements are implicitly followed
12227 by a RESX statement to resume execution after the exception.
12228 So in this case the TRY_CATCH never falls through. */
12233 /* Try to determine if we can fall out of the bottom of BLOCK. This guess
12234 need not be 100% accurate; simply be conservative and return true if we
12235 don't know. This is used only to avoid stupidly generating extra code.
12236 If we're wrong, we'll just delete the extra code later. */
12239 block_may_fallthru (const_tree block
)
12241 /* This CONST_CAST is okay because expr_last returns its argument
12242 unmodified and we assign it to a const_tree. */
12243 const_tree stmt
= expr_last (CONST_CAST_TREE (block
));
12245 switch (stmt
? TREE_CODE (stmt
) : ERROR_MARK
)
12249 /* Easy cases. If the last statement of the block implies
12250 control transfer, then we can't fall through. */
12254 /* If SWITCH_LABELS is set, this is lowered, and represents a
12255 branch to a selected label and hence can not fall through.
12256 Otherwise SWITCH_BODY is set, and the switch can fall
12258 return SWITCH_LABELS (stmt
) == NULL_TREE
;
12261 if (block_may_fallthru (COND_EXPR_THEN (stmt
)))
12263 return block_may_fallthru (COND_EXPR_ELSE (stmt
));
12266 return block_may_fallthru (BIND_EXPR_BODY (stmt
));
12268 case TRY_CATCH_EXPR
:
12269 return try_catch_may_fallthru (stmt
);
12271 case TRY_FINALLY_EXPR
:
12272 /* The finally clause is always executed after the try clause,
12273 so if it does not fall through, then the try-finally will not
12274 fall through. Otherwise, if the try clause does not fall
12275 through, then when the finally clause falls through it will
12276 resume execution wherever the try clause was going. So the
12277 whole try-finally will only fall through if both the try
12278 clause and the finally clause fall through. */
12279 return (block_may_fallthru (TREE_OPERAND (stmt
, 0))
12280 && block_may_fallthru (TREE_OPERAND (stmt
, 1)));
12283 if (TREE_CODE (TREE_OPERAND (stmt
, 1)) == CALL_EXPR
)
12284 stmt
= TREE_OPERAND (stmt
, 1);
12290 /* Functions that do not return do not fall through. */
12291 return (call_expr_flags (stmt
) & ECF_NORETURN
) == 0;
12293 case CLEANUP_POINT_EXPR
:
12294 return block_may_fallthru (TREE_OPERAND (stmt
, 0));
12297 return block_may_fallthru (TREE_OPERAND (stmt
, 1));
12303 return lang_hooks
.block_may_fallthru (stmt
);
12307 /* True if we are using EH to handle cleanups. */
12308 static bool using_eh_for_cleanups_flag
= false;
12310 /* This routine is called from front ends to indicate eh should be used for
12313 using_eh_for_cleanups (void)
12315 using_eh_for_cleanups_flag
= true;
12318 /* Query whether EH is used for cleanups. */
12320 using_eh_for_cleanups_p (void)
12322 return using_eh_for_cleanups_flag
;
12325 /* Wrapper for tree_code_name to ensure that tree code is valid */
12327 get_tree_code_name (enum tree_code code
)
12329 const char *invalid
= "<invalid tree code>";
12331 if (code
>= MAX_TREE_CODES
)
12334 return tree_code_name
[code
];
12337 /* Drops the TREE_OVERFLOW flag from T. */
12340 drop_tree_overflow (tree t
)
12342 gcc_checking_assert (TREE_OVERFLOW (t
));
12344 /* For tree codes with a sharing machinery re-build the result. */
12345 if (TREE_CODE (t
) == INTEGER_CST
)
12346 return build_int_cst_wide (TREE_TYPE (t
),
12347 TREE_INT_CST_LOW (t
), TREE_INT_CST_HIGH (t
));
12349 /* Otherwise, as all tcc_constants are possibly shared, copy the node
12350 and drop the flag. */
12352 TREE_OVERFLOW (t
) = 0;
12356 /* Given a memory reference expression T, return its base address.
12357 The base address of a memory reference expression is the main
12358 object being referenced. For instance, the base address for
12359 'array[i].fld[j]' is 'array'. You can think of this as stripping
12360 away the offset part from a memory address.
12362 This function calls handled_component_p to strip away all the inner
12363 parts of the memory reference until it reaches the base object. */
12366 get_base_address (tree t
)
12368 while (handled_component_p (t
))
12369 t
= TREE_OPERAND (t
, 0);
12371 if ((TREE_CODE (t
) == MEM_REF
12372 || TREE_CODE (t
) == TARGET_MEM_REF
)
12373 && TREE_CODE (TREE_OPERAND (t
, 0)) == ADDR_EXPR
)
12374 t
= TREE_OPERAND (TREE_OPERAND (t
, 0), 0);
12376 /* ??? Either the alias oracle or all callers need to properly deal
12377 with WITH_SIZE_EXPRs before we can look through those. */
12378 if (TREE_CODE (t
) == WITH_SIZE_EXPR
)
12384 #include "gt-tree.h"