1 /* Language-independent node constructors for parse phase of GNU compiler.
2 Copyright (C) 1987-2017 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 can occasionally
28 calls language-dependent routines. */
32 #include "coretypes.h"
37 #include "tree-pass.h"
40 #include "diagnostic.h"
43 #include "fold-const.h"
44 #include "stor-layout.h"
47 #include "toplev.h" /* get_random_seed */
49 #include "common/common-target.h"
50 #include "langhooks.h"
51 #include "tree-inline.h"
52 #include "tree-iterator.h"
53 #include "internal-fn.h"
54 #include "gimple-iterator.h"
58 #include "langhooks-def.h"
59 #include "tree-diagnostic.h"
62 #include "print-tree.h"
63 #include "ipa-utils.h"
66 /* Tree code classes. */
68 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
69 #define END_OF_BASE_TREE_CODES tcc_exceptional,
71 const enum tree_code_class tree_code_type
[] = {
72 #include "all-tree.def"
76 #undef END_OF_BASE_TREE_CODES
78 /* Table indexed by tree code giving number of expression
79 operands beyond the fixed part of the node structure.
80 Not used for types or decls. */
82 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
83 #define END_OF_BASE_TREE_CODES 0,
85 const unsigned char tree_code_length
[] = {
86 #include "all-tree.def"
90 #undef END_OF_BASE_TREE_CODES
92 /* Names of tree components.
93 Used for printing out the tree and error messages. */
94 #define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
95 #define END_OF_BASE_TREE_CODES "@dummy",
97 static const char *const tree_code_name
[] = {
98 #include "all-tree.def"
102 #undef END_OF_BASE_TREE_CODES
104 /* Each tree code class has an associated string representation.
105 These must correspond to the tree_code_class entries. */
107 const char *const tree_code_class_strings
[] =
122 /* obstack.[ch] explicitly declined to prototype this. */
123 extern int _obstack_allocated_p (struct obstack
*h
, void *obj
);
125 /* Statistics-gathering stuff. */
127 static int tree_code_counts
[MAX_TREE_CODES
];
128 int tree_node_counts
[(int) all_kinds
];
129 int tree_node_sizes
[(int) all_kinds
];
131 /* Keep in sync with tree.h:enum tree_node_kind. */
132 static const char * const tree_node_kind_names
[] = {
151 /* Unique id for next decl created. */
152 static GTY(()) int next_decl_uid
;
153 /* Unique id for next type created. */
154 static GTY(()) unsigned next_type_uid
= 1;
155 /* Unique id for next debug decl created. Use negative numbers,
156 to catch erroneous uses. */
157 static GTY(()) int next_debug_decl_uid
;
159 /* Since we cannot rehash a type after it is in the table, we have to
160 keep the hash code. */
162 struct GTY((for_user
)) type_hash
{
167 /* Initial size of the hash table (rounded to next prime). */
168 #define TYPE_HASH_INITIAL_SIZE 1000
170 struct type_cache_hasher
: ggc_cache_ptr_hash
<type_hash
>
172 static hashval_t
hash (type_hash
*t
) { return t
->hash
; }
173 static bool equal (type_hash
*a
, type_hash
*b
);
176 keep_cache_entry (type_hash
*&t
)
178 return ggc_marked_p (t
->type
);
182 /* Now here is the hash table. When recording a type, it is added to
183 the slot whose index is the hash code. Note that the hash table is
184 used for several kinds of types (function types, array types and
185 array index range types, for now). While all these live in the
186 same table, they are completely independent, and the hash code is
187 computed differently for each of these. */
189 static GTY ((cache
)) hash_table
<type_cache_hasher
> *type_hash_table
;
191 /* Hash table and temporary node for larger integer const values. */
192 static GTY (()) tree int_cst_node
;
194 struct int_cst_hasher
: ggc_cache_ptr_hash
<tree_node
>
196 static hashval_t
hash (tree t
);
197 static bool equal (tree x
, tree y
);
200 static GTY ((cache
)) hash_table
<int_cst_hasher
> *int_cst_hash_table
;
202 /* Hash table for optimization flags and target option flags. Use the same
203 hash table for both sets of options. Nodes for building the current
204 optimization and target option nodes. The assumption is most of the time
205 the options created will already be in the hash table, so we avoid
206 allocating and freeing up a node repeatably. */
207 static GTY (()) tree cl_optimization_node
;
208 static GTY (()) tree cl_target_option_node
;
210 struct cl_option_hasher
: ggc_cache_ptr_hash
<tree_node
>
212 static hashval_t
hash (tree t
);
213 static bool equal (tree x
, tree y
);
216 static GTY ((cache
)) hash_table
<cl_option_hasher
> *cl_option_hash_table
;
218 /* General tree->tree mapping structure for use in hash tables. */
222 hash_table
<tree_decl_map_cache_hasher
> *debug_expr_for_decl
;
225 hash_table
<tree_decl_map_cache_hasher
> *value_expr_for_decl
;
227 struct tree_vec_map_cache_hasher
: ggc_cache_ptr_hash
<tree_vec_map
>
229 static hashval_t
hash (tree_vec_map
*m
) { return DECL_UID (m
->base
.from
); }
232 equal (tree_vec_map
*a
, tree_vec_map
*b
)
234 return a
->base
.from
== b
->base
.from
;
238 keep_cache_entry (tree_vec_map
*&m
)
240 return ggc_marked_p (m
->base
.from
);
245 hash_table
<tree_vec_map_cache_hasher
> *debug_args_for_decl
;
247 static void set_type_quals (tree
, int);
248 static void print_type_hash_statistics (void);
249 static void print_debug_expr_statistics (void);
250 static void print_value_expr_statistics (void);
252 tree global_trees
[TI_MAX
];
253 tree integer_types
[itk_none
];
255 bool int_n_enabled_p
[NUM_INT_N_ENTS
];
256 struct int_n_trees_t int_n_trees
[NUM_INT_N_ENTS
];
258 unsigned char tree_contains_struct
[MAX_TREE_CODES
][64];
260 /* Number of operands for each OpenMP clause. */
261 unsigned const char omp_clause_num_ops
[] =
263 0, /* OMP_CLAUSE_ERROR */
264 1, /* OMP_CLAUSE_PRIVATE */
265 1, /* OMP_CLAUSE_SHARED */
266 1, /* OMP_CLAUSE_FIRSTPRIVATE */
267 2, /* OMP_CLAUSE_LASTPRIVATE */
268 5, /* OMP_CLAUSE_REDUCTION */
269 1, /* OMP_CLAUSE_COPYIN */
270 1, /* OMP_CLAUSE_COPYPRIVATE */
271 3, /* OMP_CLAUSE_LINEAR */
272 2, /* OMP_CLAUSE_ALIGNED */
273 1, /* OMP_CLAUSE_DEPEND */
274 1, /* OMP_CLAUSE_UNIFORM */
275 1, /* OMP_CLAUSE_TO_DECLARE */
276 1, /* OMP_CLAUSE_LINK */
277 2, /* OMP_CLAUSE_FROM */
278 2, /* OMP_CLAUSE_TO */
279 2, /* OMP_CLAUSE_MAP */
280 1, /* OMP_CLAUSE_USE_DEVICE_PTR */
281 1, /* OMP_CLAUSE_IS_DEVICE_PTR */
282 2, /* OMP_CLAUSE__CACHE_ */
283 2, /* OMP_CLAUSE_GANG */
284 1, /* OMP_CLAUSE_ASYNC */
285 1, /* OMP_CLAUSE_WAIT */
286 0, /* OMP_CLAUSE_AUTO */
287 0, /* OMP_CLAUSE_SEQ */
288 1, /* OMP_CLAUSE__LOOPTEMP_ */
289 1, /* OMP_CLAUSE_IF */
290 1, /* OMP_CLAUSE_NUM_THREADS */
291 1, /* OMP_CLAUSE_SCHEDULE */
292 0, /* OMP_CLAUSE_NOWAIT */
293 1, /* OMP_CLAUSE_ORDERED */
294 0, /* OMP_CLAUSE_DEFAULT */
295 3, /* OMP_CLAUSE_COLLAPSE */
296 0, /* OMP_CLAUSE_UNTIED */
297 1, /* OMP_CLAUSE_FINAL */
298 0, /* OMP_CLAUSE_MERGEABLE */
299 1, /* OMP_CLAUSE_DEVICE */
300 1, /* OMP_CLAUSE_DIST_SCHEDULE */
301 0, /* OMP_CLAUSE_INBRANCH */
302 0, /* OMP_CLAUSE_NOTINBRANCH */
303 1, /* OMP_CLAUSE_NUM_TEAMS */
304 1, /* OMP_CLAUSE_THREAD_LIMIT */
305 0, /* OMP_CLAUSE_PROC_BIND */
306 1, /* OMP_CLAUSE_SAFELEN */
307 1, /* OMP_CLAUSE_SIMDLEN */
308 0, /* OMP_CLAUSE_FOR */
309 0, /* OMP_CLAUSE_PARALLEL */
310 0, /* OMP_CLAUSE_SECTIONS */
311 0, /* OMP_CLAUSE_TASKGROUP */
312 1, /* OMP_CLAUSE_PRIORITY */
313 1, /* OMP_CLAUSE_GRAINSIZE */
314 1, /* OMP_CLAUSE_NUM_TASKS */
315 0, /* OMP_CLAUSE_NOGROUP */
316 0, /* OMP_CLAUSE_THREADS */
317 0, /* OMP_CLAUSE_SIMD */
318 1, /* OMP_CLAUSE_HINT */
319 0, /* OMP_CLAUSE_DEFALTMAP */
320 1, /* OMP_CLAUSE__SIMDUID_ */
321 0, /* OMP_CLAUSE__SIMT_ */
322 1, /* OMP_CLAUSE__CILK_FOR_COUNT_ */
323 0, /* OMP_CLAUSE_INDEPENDENT */
324 1, /* OMP_CLAUSE_WORKER */
325 1, /* OMP_CLAUSE_VECTOR */
326 1, /* OMP_CLAUSE_NUM_GANGS */
327 1, /* OMP_CLAUSE_NUM_WORKERS */
328 1, /* OMP_CLAUSE_VECTOR_LENGTH */
329 3, /* OMP_CLAUSE_TILE */
330 2, /* OMP_CLAUSE__GRIDDIM_ */
333 const char * const omp_clause_code_name
[] =
406 /* Return the tree node structure used by tree code CODE. */
408 static inline enum tree_node_structure_enum
409 tree_node_structure_for_code (enum tree_code code
)
411 switch (TREE_CODE_CLASS (code
))
413 case tcc_declaration
:
418 return TS_FIELD_DECL
;
424 return TS_LABEL_DECL
;
426 return TS_RESULT_DECL
;
427 case DEBUG_EXPR_DECL
:
430 return TS_CONST_DECL
;
434 return TS_FUNCTION_DECL
;
435 case TRANSLATION_UNIT_DECL
:
436 return TS_TRANSLATION_UNIT_DECL
;
438 return TS_DECL_NON_COMMON
;
442 return TS_TYPE_NON_COMMON
;
451 default: /* tcc_constant and tcc_exceptional */
456 /* tcc_constant cases. */
457 case VOID_CST
: return TS_TYPED
;
458 case INTEGER_CST
: return TS_INT_CST
;
459 case REAL_CST
: return TS_REAL_CST
;
460 case FIXED_CST
: return TS_FIXED_CST
;
461 case COMPLEX_CST
: return TS_COMPLEX
;
462 case VECTOR_CST
: return TS_VECTOR
;
463 case STRING_CST
: return TS_STRING
;
464 /* tcc_exceptional cases. */
465 case ERROR_MARK
: return TS_COMMON
;
466 case IDENTIFIER_NODE
: return TS_IDENTIFIER
;
467 case TREE_LIST
: return TS_LIST
;
468 case TREE_VEC
: return TS_VEC
;
469 case SSA_NAME
: return TS_SSA_NAME
;
470 case PLACEHOLDER_EXPR
: return TS_COMMON
;
471 case STATEMENT_LIST
: return TS_STATEMENT_LIST
;
472 case BLOCK
: return TS_BLOCK
;
473 case CONSTRUCTOR
: return TS_CONSTRUCTOR
;
474 case TREE_BINFO
: return TS_BINFO
;
475 case OMP_CLAUSE
: return TS_OMP_CLAUSE
;
476 case OPTIMIZATION_NODE
: return TS_OPTIMIZATION
;
477 case TARGET_OPTION_NODE
: return TS_TARGET_OPTION
;
485 /* Initialize tree_contains_struct to describe the hierarchy of tree
489 initialize_tree_contains_struct (void)
493 for (i
= ERROR_MARK
; i
< LAST_AND_UNUSED_TREE_CODE
; i
++)
496 enum tree_node_structure_enum ts_code
;
498 code
= (enum tree_code
) i
;
499 ts_code
= tree_node_structure_for_code (code
);
501 /* Mark the TS structure itself. */
502 tree_contains_struct
[code
][ts_code
] = 1;
504 /* Mark all the structures that TS is derived from. */
509 case TS_OPTIMIZATION
:
510 case TS_TARGET_OPTION
:
524 case TS_STATEMENT_LIST
:
525 MARK_TS_TYPED (code
);
529 case TS_DECL_MINIMAL
:
535 MARK_TS_COMMON (code
);
538 case TS_TYPE_WITH_LANG_SPECIFIC
:
539 MARK_TS_TYPE_COMMON (code
);
542 case TS_TYPE_NON_COMMON
:
543 MARK_TS_TYPE_WITH_LANG_SPECIFIC (code
);
547 MARK_TS_DECL_MINIMAL (code
);
552 MARK_TS_DECL_COMMON (code
);
555 case TS_DECL_NON_COMMON
:
556 MARK_TS_DECL_WITH_VIS (code
);
559 case TS_DECL_WITH_VIS
:
563 MARK_TS_DECL_WRTL (code
);
567 MARK_TS_DECL_COMMON (code
);
571 MARK_TS_DECL_WITH_VIS (code
);
575 case TS_FUNCTION_DECL
:
576 MARK_TS_DECL_NON_COMMON (code
);
579 case TS_TRANSLATION_UNIT_DECL
:
580 MARK_TS_DECL_COMMON (code
);
588 /* Basic consistency checks for attributes used in fold. */
589 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_NON_COMMON
]);
590 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_NON_COMMON
]);
591 gcc_assert (tree_contains_struct
[CONST_DECL
][TS_DECL_COMMON
]);
592 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_COMMON
]);
593 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_DECL_COMMON
]);
594 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_DECL_COMMON
]);
595 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_COMMON
]);
596 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_COMMON
]);
597 gcc_assert (tree_contains_struct
[TRANSLATION_UNIT_DECL
][TS_DECL_COMMON
]);
598 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_DECL_COMMON
]);
599 gcc_assert (tree_contains_struct
[FIELD_DECL
][TS_DECL_COMMON
]);
600 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_WRTL
]);
601 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_DECL_WRTL
]);
602 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_DECL_WRTL
]);
603 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_WRTL
]);
604 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_DECL_WRTL
]);
605 gcc_assert (tree_contains_struct
[CONST_DECL
][TS_DECL_MINIMAL
]);
606 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_MINIMAL
]);
607 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_DECL_MINIMAL
]);
608 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_DECL_MINIMAL
]);
609 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_MINIMAL
]);
610 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_MINIMAL
]);
611 gcc_assert (tree_contains_struct
[TRANSLATION_UNIT_DECL
][TS_DECL_MINIMAL
]);
612 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_DECL_MINIMAL
]);
613 gcc_assert (tree_contains_struct
[FIELD_DECL
][TS_DECL_MINIMAL
]);
614 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_WITH_VIS
]);
615 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_WITH_VIS
]);
616 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_WITH_VIS
]);
617 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_VAR_DECL
]);
618 gcc_assert (tree_contains_struct
[FIELD_DECL
][TS_FIELD_DECL
]);
619 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_PARM_DECL
]);
620 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_LABEL_DECL
]);
621 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_RESULT_DECL
]);
622 gcc_assert (tree_contains_struct
[CONST_DECL
][TS_CONST_DECL
]);
623 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_TYPE_DECL
]);
624 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_FUNCTION_DECL
]);
625 gcc_assert (tree_contains_struct
[IMPORTED_DECL
][TS_DECL_MINIMAL
]);
626 gcc_assert (tree_contains_struct
[IMPORTED_DECL
][TS_DECL_COMMON
]);
627 gcc_assert (tree_contains_struct
[NAMELIST_DECL
][TS_DECL_MINIMAL
]);
628 gcc_assert (tree_contains_struct
[NAMELIST_DECL
][TS_DECL_COMMON
]);
637 /* Initialize the hash table of types. */
639 = hash_table
<type_cache_hasher
>::create_ggc (TYPE_HASH_INITIAL_SIZE
);
642 = hash_table
<tree_decl_map_cache_hasher
>::create_ggc (512);
645 = hash_table
<tree_decl_map_cache_hasher
>::create_ggc (512);
647 int_cst_hash_table
= hash_table
<int_cst_hasher
>::create_ggc (1024);
649 int_cst_node
= make_int_cst (1, 1);
651 cl_option_hash_table
= hash_table
<cl_option_hasher
>::create_ggc (64);
653 cl_optimization_node
= make_node (OPTIMIZATION_NODE
);
654 cl_target_option_node
= make_node (TARGET_OPTION_NODE
);
656 /* Initialize the tree_contains_struct array. */
657 initialize_tree_contains_struct ();
658 lang_hooks
.init_ts ();
662 /* The name of the object as the assembler will see it (but before any
663 translations made by ASM_OUTPUT_LABELREF). Often this is the same
664 as DECL_NAME. It is an IDENTIFIER_NODE. */
666 decl_assembler_name (tree decl
)
668 if (!DECL_ASSEMBLER_NAME_SET_P (decl
))
669 lang_hooks
.set_decl_assembler_name (decl
);
670 return DECL_WITH_VIS_CHECK (decl
)->decl_with_vis
.assembler_name
;
673 /* When the target supports COMDAT groups, this indicates which group the
674 DECL is associated with. This can be either an IDENTIFIER_NODE or a
675 decl, in which case its DECL_ASSEMBLER_NAME identifies the group. */
677 decl_comdat_group (const_tree node
)
679 struct symtab_node
*snode
= symtab_node::get (node
);
682 return snode
->get_comdat_group ();
685 /* Likewise, but make sure it's been reduced to an IDENTIFIER_NODE. */
687 decl_comdat_group_id (const_tree node
)
689 struct symtab_node
*snode
= symtab_node::get (node
);
692 return snode
->get_comdat_group_id ();
695 /* When the target supports named section, return its name as IDENTIFIER_NODE
696 or NULL if it is in no section. */
698 decl_section_name (const_tree node
)
700 struct symtab_node
*snode
= symtab_node::get (node
);
703 return snode
->get_section ();
706 /* Set section name of NODE to VALUE (that is expected to be
709 set_decl_section_name (tree node
, const char *value
)
711 struct symtab_node
*snode
;
715 snode
= symtab_node::get (node
);
719 else if (VAR_P (node
))
720 snode
= varpool_node::get_create (node
);
722 snode
= cgraph_node::get_create (node
);
723 snode
->set_section (value
);
726 /* Return TLS model of a variable NODE. */
728 decl_tls_model (const_tree node
)
730 struct varpool_node
*snode
= varpool_node::get (node
);
732 return TLS_MODEL_NONE
;
733 return snode
->tls_model
;
736 /* Set TLS model of variable NODE to MODEL. */
738 set_decl_tls_model (tree node
, enum tls_model model
)
740 struct varpool_node
*vnode
;
742 if (model
== TLS_MODEL_NONE
)
744 vnode
= varpool_node::get (node
);
749 vnode
= varpool_node::get_create (node
);
750 vnode
->tls_model
= model
;
753 /* Compute the number of bytes occupied by a tree with code CODE.
754 This function cannot be used for nodes that have variable sizes,
755 including TREE_VEC, INTEGER_CST, STRING_CST, and CALL_EXPR. */
757 tree_code_size (enum tree_code code
)
759 switch (TREE_CODE_CLASS (code
))
761 case tcc_declaration
: /* A decl node */
766 return sizeof (struct tree_field_decl
);
768 return sizeof (struct tree_parm_decl
);
770 return sizeof (struct tree_var_decl
);
772 return sizeof (struct tree_label_decl
);
774 return sizeof (struct tree_result_decl
);
776 return sizeof (struct tree_const_decl
);
778 return sizeof (struct tree_type_decl
);
780 return sizeof (struct tree_function_decl
);
781 case DEBUG_EXPR_DECL
:
782 return sizeof (struct tree_decl_with_rtl
);
783 case TRANSLATION_UNIT_DECL
:
784 return sizeof (struct tree_translation_unit_decl
);
788 return sizeof (struct tree_decl_non_common
);
790 return lang_hooks
.tree_size (code
);
794 case tcc_type
: /* a type node */
795 return sizeof (struct tree_type_non_common
);
797 case tcc_reference
: /* a reference */
798 case tcc_expression
: /* an expression */
799 case tcc_statement
: /* an expression with side effects */
800 case tcc_comparison
: /* a comparison expression */
801 case tcc_unary
: /* a unary arithmetic expression */
802 case tcc_binary
: /* a binary arithmetic expression */
803 return (sizeof (struct tree_exp
)
804 + (TREE_CODE_LENGTH (code
) - 1) * sizeof (tree
));
806 case tcc_constant
: /* a constant */
809 case VOID_CST
: return sizeof (struct tree_typed
);
810 case INTEGER_CST
: gcc_unreachable ();
811 case REAL_CST
: return sizeof (struct tree_real_cst
);
812 case FIXED_CST
: return sizeof (struct tree_fixed_cst
);
813 case COMPLEX_CST
: return sizeof (struct tree_complex
);
814 case VECTOR_CST
: return sizeof (struct tree_vector
);
815 case STRING_CST
: gcc_unreachable ();
817 return lang_hooks
.tree_size (code
);
820 case tcc_exceptional
: /* something random, like an identifier. */
823 case IDENTIFIER_NODE
: return lang_hooks
.identifier_size
;
824 case TREE_LIST
: return sizeof (struct tree_list
);
827 case PLACEHOLDER_EXPR
: return sizeof (struct tree_common
);
830 case OMP_CLAUSE
: gcc_unreachable ();
832 case SSA_NAME
: return sizeof (struct tree_ssa_name
);
834 case STATEMENT_LIST
: return sizeof (struct tree_statement_list
);
835 case BLOCK
: return sizeof (struct tree_block
);
836 case CONSTRUCTOR
: return sizeof (struct tree_constructor
);
837 case OPTIMIZATION_NODE
: return sizeof (struct tree_optimization_option
);
838 case TARGET_OPTION_NODE
: return sizeof (struct tree_target_option
);
841 return lang_hooks
.tree_size (code
);
849 /* Compute the number of bytes occupied by NODE. This routine only
850 looks at TREE_CODE, except for those nodes that have variable sizes. */
852 tree_size (const_tree node
)
854 const enum tree_code code
= TREE_CODE (node
);
858 return (sizeof (struct tree_int_cst
)
859 + (TREE_INT_CST_EXT_NUNITS (node
) - 1) * sizeof (HOST_WIDE_INT
));
862 return (offsetof (struct tree_binfo
, base_binfos
)
864 ::embedded_size (BINFO_N_BASE_BINFOS (node
)));
867 return (sizeof (struct tree_vec
)
868 + (TREE_VEC_LENGTH (node
) - 1) * sizeof (tree
));
871 return (sizeof (struct tree_vector
)
872 + (TYPE_VECTOR_SUBPARTS (TREE_TYPE (node
)) - 1) * sizeof (tree
));
875 return TREE_STRING_LENGTH (node
) + offsetof (struct tree_string
, str
) + 1;
878 return (sizeof (struct tree_omp_clause
)
879 + (omp_clause_num_ops
[OMP_CLAUSE_CODE (node
)] - 1)
883 if (TREE_CODE_CLASS (code
) == tcc_vl_exp
)
884 return (sizeof (struct tree_exp
)
885 + (VL_EXP_OPERAND_LENGTH (node
) - 1) * sizeof (tree
));
887 return tree_code_size (code
);
891 /* Record interesting allocation statistics for a tree node with CODE
895 record_node_allocation_statistics (enum tree_code code ATTRIBUTE_UNUSED
,
896 size_t length ATTRIBUTE_UNUSED
)
898 enum tree_code_class type
= TREE_CODE_CLASS (code
);
901 if (!GATHER_STATISTICS
)
906 case tcc_declaration
: /* A decl node */
910 case tcc_type
: /* a type node */
914 case tcc_statement
: /* an expression with side effects */
918 case tcc_reference
: /* a reference */
922 case tcc_expression
: /* an expression */
923 case tcc_comparison
: /* a comparison expression */
924 case tcc_unary
: /* a unary arithmetic expression */
925 case tcc_binary
: /* a binary arithmetic expression */
929 case tcc_constant
: /* a constant */
933 case tcc_exceptional
: /* something random, like an identifier. */
936 case IDENTIFIER_NODE
:
949 kind
= ssa_name_kind
;
961 kind
= omp_clause_kind
;
978 tree_code_counts
[(int) code
]++;
979 tree_node_counts
[(int) kind
]++;
980 tree_node_sizes
[(int) kind
] += length
;
983 /* Allocate and return a new UID from the DECL_UID namespace. */
986 allocate_decl_uid (void)
988 return next_decl_uid
++;
991 /* Return a newly allocated node of code CODE. For decl and type
992 nodes, some other fields are initialized. The rest of the node is
993 initialized to zero. This function cannot be used for TREE_VEC,
994 INTEGER_CST or OMP_CLAUSE nodes, which is enforced by asserts in
997 Achoo! I got a code in the node. */
1000 make_node_stat (enum tree_code code MEM_STAT_DECL
)
1003 enum tree_code_class type
= TREE_CODE_CLASS (code
);
1004 size_t length
= tree_code_size (code
);
1006 record_node_allocation_statistics (code
, length
);
1008 t
= ggc_alloc_cleared_tree_node_stat (length PASS_MEM_STAT
);
1009 TREE_SET_CODE (t
, code
);
1014 TREE_SIDE_EFFECTS (t
) = 1;
1017 case tcc_declaration
:
1018 if (CODE_CONTAINS_STRUCT (code
, TS_DECL_COMMON
))
1020 if (code
== FUNCTION_DECL
)
1022 SET_DECL_ALIGN (t
, FUNCTION_ALIGNMENT (FUNCTION_BOUNDARY
));
1023 SET_DECL_MODE (t
, FUNCTION_MODE
);
1026 SET_DECL_ALIGN (t
, 1);
1028 DECL_SOURCE_LOCATION (t
) = input_location
;
1029 if (TREE_CODE (t
) == DEBUG_EXPR_DECL
)
1030 DECL_UID (t
) = --next_debug_decl_uid
;
1033 DECL_UID (t
) = allocate_decl_uid ();
1034 SET_DECL_PT_UID (t
, -1);
1036 if (TREE_CODE (t
) == LABEL_DECL
)
1037 LABEL_DECL_UID (t
) = -1;
1042 TYPE_UID (t
) = next_type_uid
++;
1043 SET_TYPE_ALIGN (t
, BITS_PER_UNIT
);
1044 TYPE_USER_ALIGN (t
) = 0;
1045 TYPE_MAIN_VARIANT (t
) = t
;
1046 TYPE_CANONICAL (t
) = t
;
1048 /* Default to no attributes for type, but let target change that. */
1049 TYPE_ATTRIBUTES (t
) = NULL_TREE
;
1050 targetm
.set_default_type_attributes (t
);
1052 /* We have not yet computed the alias set for this type. */
1053 TYPE_ALIAS_SET (t
) = -1;
1057 TREE_CONSTANT (t
) = 1;
1060 case tcc_expression
:
1066 case PREDECREMENT_EXPR
:
1067 case PREINCREMENT_EXPR
:
1068 case POSTDECREMENT_EXPR
:
1069 case POSTINCREMENT_EXPR
:
1070 /* All of these have side-effects, no matter what their
1072 TREE_SIDE_EFFECTS (t
) = 1;
1080 case tcc_exceptional
:
1083 case TARGET_OPTION_NODE
:
1084 TREE_TARGET_OPTION(t
)
1085 = ggc_cleared_alloc
<struct cl_target_option
> ();
1088 case OPTIMIZATION_NODE
:
1089 TREE_OPTIMIZATION (t
)
1090 = ggc_cleared_alloc
<struct cl_optimization
> ();
1099 /* Other classes need no special treatment. */
1106 /* Free tree node. */
1109 free_node (tree node
)
1111 enum tree_code code
= TREE_CODE (node
);
1112 if (GATHER_STATISTICS
)
1114 tree_code_counts
[(int) TREE_CODE (node
)]--;
1115 tree_node_counts
[(int) t_kind
]--;
1116 tree_node_sizes
[(int) t_kind
] -= tree_size (node
);
1118 if (CODE_CONTAINS_STRUCT (code
, TS_CONSTRUCTOR
))
1119 vec_free (CONSTRUCTOR_ELTS (node
));
1120 else if (code
== BLOCK
)
1121 vec_free (BLOCK_NONLOCALIZED_VARS (node
));
1122 else if (code
== TREE_BINFO
)
1123 vec_free (BINFO_BASE_ACCESSES (node
));
1127 /* Return a new node with the same contents as NODE except that its
1128 TREE_CHAIN, if it has one, is zero and it has a fresh uid. */
1131 copy_node_stat (tree node MEM_STAT_DECL
)
1134 enum tree_code code
= TREE_CODE (node
);
1137 gcc_assert (code
!= STATEMENT_LIST
);
1139 length
= tree_size (node
);
1140 record_node_allocation_statistics (code
, length
);
1141 t
= ggc_alloc_tree_node_stat (length PASS_MEM_STAT
);
1142 memcpy (t
, node
, length
);
1144 if (CODE_CONTAINS_STRUCT (code
, TS_COMMON
))
1146 TREE_ASM_WRITTEN (t
) = 0;
1147 TREE_VISITED (t
) = 0;
1149 if (TREE_CODE_CLASS (code
) == tcc_declaration
)
1151 if (code
== DEBUG_EXPR_DECL
)
1152 DECL_UID (t
) = --next_debug_decl_uid
;
1155 DECL_UID (t
) = allocate_decl_uid ();
1156 if (DECL_PT_UID_SET_P (node
))
1157 SET_DECL_PT_UID (t
, DECL_PT_UID (node
));
1159 if ((TREE_CODE (node
) == PARM_DECL
|| VAR_P (node
))
1160 && DECL_HAS_VALUE_EXPR_P (node
))
1162 SET_DECL_VALUE_EXPR (t
, DECL_VALUE_EXPR (node
));
1163 DECL_HAS_VALUE_EXPR_P (t
) = 1;
1165 /* DECL_DEBUG_EXPR is copied explicitely by callers. */
1168 DECL_HAS_DEBUG_EXPR_P (t
) = 0;
1169 t
->decl_with_vis
.symtab_node
= NULL
;
1171 if (VAR_P (node
) && DECL_HAS_INIT_PRIORITY_P (node
))
1173 SET_DECL_INIT_PRIORITY (t
, DECL_INIT_PRIORITY (node
));
1174 DECL_HAS_INIT_PRIORITY_P (t
) = 1;
1176 if (TREE_CODE (node
) == FUNCTION_DECL
)
1178 DECL_STRUCT_FUNCTION (t
) = NULL
;
1179 t
->decl_with_vis
.symtab_node
= NULL
;
1182 else if (TREE_CODE_CLASS (code
) == tcc_type
)
1184 TYPE_UID (t
) = next_type_uid
++;
1185 /* The following is so that the debug code for
1186 the copy is different from the original type.
1187 The two statements usually duplicate each other
1188 (because they clear fields of the same union),
1189 but the optimizer should catch that. */
1190 TYPE_SYMTAB_POINTER (t
) = 0;
1191 TYPE_SYMTAB_ADDRESS (t
) = 0;
1193 /* Do not copy the values cache. */
1194 if (TYPE_CACHED_VALUES_P (t
))
1196 TYPE_CACHED_VALUES_P (t
) = 0;
1197 TYPE_CACHED_VALUES (t
) = NULL_TREE
;
1200 else if (code
== TARGET_OPTION_NODE
)
1202 TREE_TARGET_OPTION (t
) = ggc_alloc
<struct cl_target_option
>();
1203 memcpy (TREE_TARGET_OPTION (t
), TREE_TARGET_OPTION (node
),
1204 sizeof (struct cl_target_option
));
1206 else if (code
== OPTIMIZATION_NODE
)
1208 TREE_OPTIMIZATION (t
) = ggc_alloc
<struct cl_optimization
>();
1209 memcpy (TREE_OPTIMIZATION (t
), TREE_OPTIMIZATION (node
),
1210 sizeof (struct cl_optimization
));
1216 /* Return a copy of a chain of nodes, chained through the TREE_CHAIN field.
1217 For example, this can copy a list made of TREE_LIST nodes. */
1220 copy_list (tree list
)
1228 head
= prev
= copy_node (list
);
1229 next
= TREE_CHAIN (list
);
1232 TREE_CHAIN (prev
) = copy_node (next
);
1233 prev
= TREE_CHAIN (prev
);
1234 next
= TREE_CHAIN (next
);
1240 /* Return the value that TREE_INT_CST_EXT_NUNITS should have for an
1241 INTEGER_CST with value CST and type TYPE. */
1244 get_int_cst_ext_nunits (tree type
, const wide_int
&cst
)
1246 gcc_checking_assert (cst
.get_precision () == TYPE_PRECISION (type
));
1247 /* We need extra HWIs if CST is an unsigned integer with its
1249 if (TYPE_UNSIGNED (type
) && wi::neg_p (cst
))
1250 return cst
.get_precision () / HOST_BITS_PER_WIDE_INT
+ 1;
1251 return cst
.get_len ();
1254 /* Return a new INTEGER_CST with value CST and type TYPE. */
1257 build_new_int_cst (tree type
, const wide_int
&cst
)
1259 unsigned int len
= cst
.get_len ();
1260 unsigned int ext_len
= get_int_cst_ext_nunits (type
, cst
);
1261 tree nt
= make_int_cst (len
, ext_len
);
1266 TREE_INT_CST_ELT (nt
, ext_len
)
1267 = zext_hwi (-1, cst
.get_precision () % HOST_BITS_PER_WIDE_INT
);
1268 for (unsigned int i
= len
; i
< ext_len
; ++i
)
1269 TREE_INT_CST_ELT (nt
, i
) = -1;
1271 else if (TYPE_UNSIGNED (type
)
1272 && cst
.get_precision () < len
* HOST_BITS_PER_WIDE_INT
)
1275 TREE_INT_CST_ELT (nt
, len
)
1276 = zext_hwi (cst
.elt (len
),
1277 cst
.get_precision () % HOST_BITS_PER_WIDE_INT
);
1280 for (unsigned int i
= 0; i
< len
; i
++)
1281 TREE_INT_CST_ELT (nt
, i
) = cst
.elt (i
);
1282 TREE_TYPE (nt
) = type
;
1286 /* Create an INT_CST node with a LOW value sign extended to TYPE. */
1289 build_int_cst (tree type
, HOST_WIDE_INT low
)
1291 /* Support legacy code. */
1293 type
= integer_type_node
;
1295 return wide_int_to_tree (type
, wi::shwi (low
, TYPE_PRECISION (type
)));
1299 build_int_cstu (tree type
, unsigned HOST_WIDE_INT cst
)
1301 return wide_int_to_tree (type
, wi::uhwi (cst
, TYPE_PRECISION (type
)));
1304 /* Create an INT_CST node with a LOW value sign extended to TYPE. */
1307 build_int_cst_type (tree type
, HOST_WIDE_INT low
)
1310 return wide_int_to_tree (type
, wi::shwi (low
, TYPE_PRECISION (type
)));
1313 /* Constructs tree in type TYPE from with value given by CST. Signedness
1314 of CST is assumed to be the same as the signedness of TYPE. */
1317 double_int_to_tree (tree type
, double_int cst
)
1319 return wide_int_to_tree (type
, widest_int::from (cst
, TYPE_SIGN (type
)));
1322 /* We force the wide_int CST to the range of the type TYPE by sign or
1323 zero extending it. OVERFLOWABLE indicates if we are interested in
1324 overflow of the value, when >0 we are only interested in signed
1325 overflow, for <0 we are interested in any overflow. OVERFLOWED
1326 indicates whether overflow has already occurred. CONST_OVERFLOWED
1327 indicates whether constant overflow has already occurred. We force
1328 T's value to be within range of T's type (by setting to 0 or 1 all
1329 the bits outside the type's range). We set TREE_OVERFLOWED if,
1330 OVERFLOWED is nonzero,
1331 or OVERFLOWABLE is >0 and signed overflow occurs
1332 or OVERFLOWABLE is <0 and any overflow occurs
1333 We return a new tree node for the extended wide_int. The node
1334 is shared if no overflow flags are set. */
1338 force_fit_type (tree type
, const wide_int_ref
&cst
,
1339 int overflowable
, bool overflowed
)
1341 signop sign
= TYPE_SIGN (type
);
1343 /* If we need to set overflow flags, return a new unshared node. */
1344 if (overflowed
|| !wi::fits_to_tree_p (cst
, type
))
1348 || (overflowable
> 0 && sign
== SIGNED
))
1350 wide_int tmp
= wide_int::from (cst
, TYPE_PRECISION (type
), sign
);
1351 tree t
= build_new_int_cst (type
, tmp
);
1352 TREE_OVERFLOW (t
) = 1;
1357 /* Else build a shared node. */
1358 return wide_int_to_tree (type
, cst
);
1361 /* These are the hash table functions for the hash table of INTEGER_CST
1362 nodes of a sizetype. */
1364 /* Return the hash code X, an INTEGER_CST. */
1367 int_cst_hasher::hash (tree x
)
1369 const_tree
const t
= x
;
1370 hashval_t code
= TYPE_UID (TREE_TYPE (t
));
1373 for (i
= 0; i
< TREE_INT_CST_NUNITS (t
); i
++)
1374 code
= iterative_hash_host_wide_int (TREE_INT_CST_ELT(t
, i
), code
);
1379 /* Return nonzero if the value represented by *X (an INTEGER_CST tree node)
1380 is the same as that given by *Y, which is the same. */
1383 int_cst_hasher::equal (tree x
, tree y
)
1385 const_tree
const xt
= x
;
1386 const_tree
const yt
= y
;
1388 if (TREE_TYPE (xt
) != TREE_TYPE (yt
)
1389 || TREE_INT_CST_NUNITS (xt
) != TREE_INT_CST_NUNITS (yt
)
1390 || TREE_INT_CST_EXT_NUNITS (xt
) != TREE_INT_CST_EXT_NUNITS (yt
))
1393 for (int i
= 0; i
< TREE_INT_CST_NUNITS (xt
); i
++)
1394 if (TREE_INT_CST_ELT (xt
, i
) != TREE_INT_CST_ELT (yt
, i
))
1400 /* Create an INT_CST node of TYPE and value CST.
1401 The returned node is always shared. For small integers we use a
1402 per-type vector cache, for larger ones we use a single hash table.
1403 The value is extended from its precision according to the sign of
1404 the type to be a multiple of HOST_BITS_PER_WIDE_INT. This defines
1405 the upper bits and ensures that hashing and value equality based
1406 upon the underlying HOST_WIDE_INTs works without masking. */
1409 wide_int_to_tree (tree type
, const wide_int_ref
&pcst
)
1416 unsigned int prec
= TYPE_PRECISION (type
);
1417 signop sgn
= TYPE_SIGN (type
);
1419 /* Verify that everything is canonical. */
1420 int l
= pcst
.get_len ();
1423 if (pcst
.elt (l
- 1) == 0)
1424 gcc_checking_assert (pcst
.elt (l
- 2) < 0);
1425 if (pcst
.elt (l
- 1) == HOST_WIDE_INT_M1
)
1426 gcc_checking_assert (pcst
.elt (l
- 2) >= 0);
1429 wide_int cst
= wide_int::from (pcst
, prec
, sgn
);
1430 unsigned int ext_len
= get_int_cst_ext_nunits (type
, cst
);
1434 /* We just need to store a single HOST_WIDE_INT. */
1436 if (TYPE_UNSIGNED (type
))
1437 hwi
= cst
.to_uhwi ();
1439 hwi
= cst
.to_shwi ();
1441 switch (TREE_CODE (type
))
1444 gcc_assert (hwi
== 0);
1448 case REFERENCE_TYPE
:
1449 case POINTER_BOUNDS_TYPE
:
1450 /* Cache NULL pointer and zero bounds. */
1459 /* Cache false or true. */
1461 if (IN_RANGE (hwi
, 0, 1))
1467 if (TYPE_SIGN (type
) == UNSIGNED
)
1470 limit
= INTEGER_SHARE_LIMIT
;
1471 if (IN_RANGE (hwi
, 0, INTEGER_SHARE_LIMIT
- 1))
1476 /* Cache [-1, N). */
1477 limit
= INTEGER_SHARE_LIMIT
+ 1;
1478 if (IN_RANGE (hwi
, -1, INTEGER_SHARE_LIMIT
- 1))
1492 /* Look for it in the type's vector of small shared ints. */
1493 if (!TYPE_CACHED_VALUES_P (type
))
1495 TYPE_CACHED_VALUES_P (type
) = 1;
1496 TYPE_CACHED_VALUES (type
) = make_tree_vec (limit
);
1499 t
= TREE_VEC_ELT (TYPE_CACHED_VALUES (type
), ix
);
1501 /* Make sure no one is clobbering the shared constant. */
1502 gcc_checking_assert (TREE_TYPE (t
) == type
1503 && TREE_INT_CST_NUNITS (t
) == 1
1504 && TREE_INT_CST_OFFSET_NUNITS (t
) == 1
1505 && TREE_INT_CST_EXT_NUNITS (t
) == 1
1506 && TREE_INT_CST_ELT (t
, 0) == hwi
);
1509 /* Create a new shared int. */
1510 t
= build_new_int_cst (type
, cst
);
1511 TREE_VEC_ELT (TYPE_CACHED_VALUES (type
), ix
) = t
;
1516 /* Use the cache of larger shared ints, using int_cst_node as
1519 TREE_INT_CST_ELT (int_cst_node
, 0) = hwi
;
1520 TREE_TYPE (int_cst_node
) = type
;
1522 tree
*slot
= int_cst_hash_table
->find_slot (int_cst_node
, INSERT
);
1526 /* Insert this one into the hash table. */
1529 /* Make a new node for next time round. */
1530 int_cst_node
= make_int_cst (1, 1);
1536 /* The value either hashes properly or we drop it on the floor
1537 for the gc to take care of. There will not be enough of them
1540 tree nt
= build_new_int_cst (type
, cst
);
1541 tree
*slot
= int_cst_hash_table
->find_slot (nt
, INSERT
);
1545 /* Insert this one into the hash table. */
1555 cache_integer_cst (tree t
)
1557 tree type
= TREE_TYPE (t
);
1560 int prec
= TYPE_PRECISION (type
);
1562 gcc_assert (!TREE_OVERFLOW (t
));
1564 switch (TREE_CODE (type
))
1567 gcc_assert (integer_zerop (t
));
1571 case REFERENCE_TYPE
:
1572 /* Cache NULL pointer. */
1573 if (integer_zerop (t
))
1581 /* Cache false or true. */
1583 if (wi::ltu_p (t
, 2))
1584 ix
= TREE_INT_CST_ELT (t
, 0);
1589 if (TYPE_UNSIGNED (type
))
1592 limit
= INTEGER_SHARE_LIMIT
;
1594 /* This is a little hokie, but if the prec is smaller than
1595 what is necessary to hold INTEGER_SHARE_LIMIT, then the
1596 obvious test will not get the correct answer. */
1597 if (prec
< HOST_BITS_PER_WIDE_INT
)
1599 if (tree_to_uhwi (t
) < (unsigned HOST_WIDE_INT
) INTEGER_SHARE_LIMIT
)
1600 ix
= tree_to_uhwi (t
);
1602 else if (wi::ltu_p (t
, INTEGER_SHARE_LIMIT
))
1603 ix
= tree_to_uhwi (t
);
1608 limit
= INTEGER_SHARE_LIMIT
+ 1;
1610 if (integer_minus_onep (t
))
1612 else if (!wi::neg_p (t
))
1614 if (prec
< HOST_BITS_PER_WIDE_INT
)
1616 if (tree_to_shwi (t
) < INTEGER_SHARE_LIMIT
)
1617 ix
= tree_to_shwi (t
) + 1;
1619 else if (wi::ltu_p (t
, INTEGER_SHARE_LIMIT
))
1620 ix
= tree_to_shwi (t
) + 1;
1634 /* Look for it in the type's vector of small shared ints. */
1635 if (!TYPE_CACHED_VALUES_P (type
))
1637 TYPE_CACHED_VALUES_P (type
) = 1;
1638 TYPE_CACHED_VALUES (type
) = make_tree_vec (limit
);
1641 gcc_assert (TREE_VEC_ELT (TYPE_CACHED_VALUES (type
), ix
) == NULL_TREE
);
1642 TREE_VEC_ELT (TYPE_CACHED_VALUES (type
), ix
) = t
;
1646 /* Use the cache of larger shared ints. */
1647 tree
*slot
= int_cst_hash_table
->find_slot (t
, INSERT
);
1648 /* If there is already an entry for the number verify it's the
1651 gcc_assert (wi::eq_p (tree (*slot
), t
));
1653 /* Otherwise insert this one into the hash table. */
1659 /* Builds an integer constant in TYPE such that lowest BITS bits are ones
1660 and the rest are zeros. */
1663 build_low_bits_mask (tree type
, unsigned bits
)
1665 gcc_assert (bits
<= TYPE_PRECISION (type
));
1667 return wide_int_to_tree (type
, wi::mask (bits
, false,
1668 TYPE_PRECISION (type
)));
1671 /* Checks that X is integer constant that can be expressed in (unsigned)
1672 HOST_WIDE_INT without loss of precision. */
1675 cst_and_fits_in_hwi (const_tree x
)
1677 return (TREE_CODE (x
) == INTEGER_CST
1678 && (tree_fits_shwi_p (x
) || tree_fits_uhwi_p (x
)));
1681 /* Build a newly constructed VECTOR_CST node of length LEN. */
1684 make_vector_stat (unsigned len MEM_STAT_DECL
)
1687 unsigned length
= (len
- 1) * sizeof (tree
) + sizeof (struct tree_vector
);
1689 record_node_allocation_statistics (VECTOR_CST
, length
);
1691 t
= ggc_alloc_cleared_tree_node_stat (length PASS_MEM_STAT
);
1693 TREE_SET_CODE (t
, VECTOR_CST
);
1694 TREE_CONSTANT (t
) = 1;
1699 /* Return a new VECTOR_CST node whose type is TYPE and whose values
1700 are in a list pointed to by VALS. */
1703 build_vector_stat (tree type
, tree
*vals MEM_STAT_DECL
)
1707 tree v
= make_vector (TYPE_VECTOR_SUBPARTS (type
));
1708 TREE_TYPE (v
) = type
;
1710 /* Iterate through elements and check for overflow. */
1711 for (cnt
= 0; cnt
< TYPE_VECTOR_SUBPARTS (type
); ++cnt
)
1713 tree value
= vals
[cnt
];
1715 VECTOR_CST_ELT (v
, cnt
) = value
;
1717 /* Don't crash if we get an address constant. */
1718 if (!CONSTANT_CLASS_P (value
))
1721 over
|= TREE_OVERFLOW (value
);
1724 TREE_OVERFLOW (v
) = over
;
1728 /* Return a new VECTOR_CST node whose type is TYPE and whose values
1729 are extracted from V, a vector of CONSTRUCTOR_ELT. */
1732 build_vector_from_ctor (tree type
, vec
<constructor_elt
, va_gc
> *v
)
1734 tree
*vec
= XALLOCAVEC (tree
, TYPE_VECTOR_SUBPARTS (type
));
1735 unsigned HOST_WIDE_INT idx
, pos
= 0;
1738 FOR_EACH_CONSTRUCTOR_VALUE (v
, idx
, value
)
1740 if (TREE_CODE (value
) == VECTOR_CST
)
1741 for (unsigned i
= 0; i
< VECTOR_CST_NELTS (value
); ++i
)
1742 vec
[pos
++] = VECTOR_CST_ELT (value
, i
);
1746 while (pos
< TYPE_VECTOR_SUBPARTS (type
))
1747 vec
[pos
++] = build_zero_cst (TREE_TYPE (type
));
1749 return build_vector (type
, vec
);
1752 /* Build a vector of type VECTYPE where all the elements are SCs. */
1754 build_vector_from_val (tree vectype
, tree sc
)
1756 int i
, nunits
= TYPE_VECTOR_SUBPARTS (vectype
);
1758 if (sc
== error_mark_node
)
1761 /* Verify that the vector type is suitable for SC. Note that there
1762 is some inconsistency in the type-system with respect to restrict
1763 qualifications of pointers. Vector types always have a main-variant
1764 element type and the qualification is applied to the vector-type.
1765 So TREE_TYPE (vector-type) does not return a properly qualified
1766 vector element-type. */
1767 gcc_checking_assert (types_compatible_p (TYPE_MAIN_VARIANT (TREE_TYPE (sc
)),
1768 TREE_TYPE (vectype
)));
1770 if (CONSTANT_CLASS_P (sc
))
1772 tree
*v
= XALLOCAVEC (tree
, nunits
);
1773 for (i
= 0; i
< nunits
; ++i
)
1775 return build_vector (vectype
, v
);
1779 vec
<constructor_elt
, va_gc
> *v
;
1780 vec_alloc (v
, nunits
);
1781 for (i
= 0; i
< nunits
; ++i
)
1782 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, sc
);
1783 return build_constructor (vectype
, v
);
1787 /* Something has messed with the elements of CONSTRUCTOR C after it was built;
1788 calculate TREE_CONSTANT and TREE_SIDE_EFFECTS. */
1791 recompute_constructor_flags (tree c
)
1795 bool constant_p
= true;
1796 bool side_effects_p
= false;
1797 vec
<constructor_elt
, va_gc
> *vals
= CONSTRUCTOR_ELTS (c
);
1799 FOR_EACH_CONSTRUCTOR_VALUE (vals
, i
, val
)
1801 /* Mostly ctors will have elts that don't have side-effects, so
1802 the usual case is to scan all the elements. Hence a single
1803 loop for both const and side effects, rather than one loop
1804 each (with early outs). */
1805 if (!TREE_CONSTANT (val
))
1807 if (TREE_SIDE_EFFECTS (val
))
1808 side_effects_p
= true;
1811 TREE_SIDE_EFFECTS (c
) = side_effects_p
;
1812 TREE_CONSTANT (c
) = constant_p
;
1815 /* Make sure that TREE_CONSTANT and TREE_SIDE_EFFECTS are correct for
1819 verify_constructor_flags (tree c
)
1823 bool constant_p
= TREE_CONSTANT (c
);
1824 bool side_effects_p
= TREE_SIDE_EFFECTS (c
);
1825 vec
<constructor_elt
, va_gc
> *vals
= CONSTRUCTOR_ELTS (c
);
1827 FOR_EACH_CONSTRUCTOR_VALUE (vals
, i
, val
)
1829 if (constant_p
&& !TREE_CONSTANT (val
))
1830 internal_error ("non-constant element in constant CONSTRUCTOR");
1831 if (!side_effects_p
&& TREE_SIDE_EFFECTS (val
))
1832 internal_error ("side-effects element in no-side-effects CONSTRUCTOR");
1836 /* Return a new CONSTRUCTOR node whose type is TYPE and whose values
1837 are in the vec pointed to by VALS. */
1839 build_constructor (tree type
, vec
<constructor_elt
, va_gc
> *vals
)
1841 tree c
= make_node (CONSTRUCTOR
);
1843 TREE_TYPE (c
) = type
;
1844 CONSTRUCTOR_ELTS (c
) = vals
;
1846 recompute_constructor_flags (c
);
1851 /* Build a CONSTRUCTOR node made of a single initializer, with the specified
1854 build_constructor_single (tree type
, tree index
, tree value
)
1856 vec
<constructor_elt
, va_gc
> *v
;
1857 constructor_elt elt
= {index
, value
};
1860 v
->quick_push (elt
);
1862 return build_constructor (type
, v
);
1866 /* Return a new CONSTRUCTOR node whose type is TYPE and whose values
1867 are in a list pointed to by VALS. */
1869 build_constructor_from_list (tree type
, tree vals
)
1872 vec
<constructor_elt
, va_gc
> *v
= NULL
;
1876 vec_alloc (v
, list_length (vals
));
1877 for (t
= vals
; t
; t
= TREE_CHAIN (t
))
1878 CONSTRUCTOR_APPEND_ELT (v
, TREE_PURPOSE (t
), TREE_VALUE (t
));
1881 return build_constructor (type
, v
);
1884 /* Return a new CONSTRUCTOR node whose type is TYPE. NELTS is the number
1885 of elements, provided as index/value pairs. */
1888 build_constructor_va (tree type
, int nelts
, ...)
1890 vec
<constructor_elt
, va_gc
> *v
= NULL
;
1893 va_start (p
, nelts
);
1894 vec_alloc (v
, nelts
);
1897 tree index
= va_arg (p
, tree
);
1898 tree value
= va_arg (p
, tree
);
1899 CONSTRUCTOR_APPEND_ELT (v
, index
, value
);
1902 return build_constructor (type
, v
);
1905 /* Return a new FIXED_CST node whose type is TYPE and value is F. */
1908 build_fixed (tree type
, FIXED_VALUE_TYPE f
)
1911 FIXED_VALUE_TYPE
*fp
;
1913 v
= make_node (FIXED_CST
);
1914 fp
= ggc_alloc
<fixed_value
> ();
1915 memcpy (fp
, &f
, sizeof (FIXED_VALUE_TYPE
));
1917 TREE_TYPE (v
) = type
;
1918 TREE_FIXED_CST_PTR (v
) = fp
;
1922 /* Return a new REAL_CST node whose type is TYPE and value is D. */
1925 build_real (tree type
, REAL_VALUE_TYPE d
)
1928 REAL_VALUE_TYPE
*dp
;
1931 /* ??? Used to check for overflow here via CHECK_FLOAT_TYPE.
1932 Consider doing it via real_convert now. */
1934 v
= make_node (REAL_CST
);
1935 dp
= ggc_alloc
<real_value
> ();
1936 memcpy (dp
, &d
, sizeof (REAL_VALUE_TYPE
));
1938 TREE_TYPE (v
) = type
;
1939 TREE_REAL_CST_PTR (v
) = dp
;
1940 TREE_OVERFLOW (v
) = overflow
;
1944 /* Like build_real, but first truncate D to the type. */
1947 build_real_truncate (tree type
, REAL_VALUE_TYPE d
)
1949 return build_real (type
, real_value_truncate (TYPE_MODE (type
), d
));
1952 /* Return a new REAL_CST node whose type is TYPE
1953 and whose value is the integer value of the INTEGER_CST node I. */
1956 real_value_from_int_cst (const_tree type
, const_tree i
)
1960 /* Clear all bits of the real value type so that we can later do
1961 bitwise comparisons to see if two values are the same. */
1962 memset (&d
, 0, sizeof d
);
1964 real_from_integer (&d
, type
? TYPE_MODE (type
) : VOIDmode
, i
,
1965 TYPE_SIGN (TREE_TYPE (i
)));
1969 /* Given a tree representing an integer constant I, return a tree
1970 representing the same value as a floating-point constant of type TYPE. */
1973 build_real_from_int_cst (tree type
, const_tree i
)
1976 int overflow
= TREE_OVERFLOW (i
);
1978 v
= build_real (type
, real_value_from_int_cst (type
, i
));
1980 TREE_OVERFLOW (v
) |= overflow
;
1984 /* Return a newly constructed STRING_CST node whose value is
1985 the LEN characters at STR.
1986 Note that for a C string literal, LEN should include the trailing NUL.
1987 The TREE_TYPE is not initialized. */
1990 build_string (int len
, const char *str
)
1995 /* Do not waste bytes provided by padding of struct tree_string. */
1996 length
= len
+ offsetof (struct tree_string
, str
) + 1;
1998 record_node_allocation_statistics (STRING_CST
, length
);
2000 s
= (tree
) ggc_internal_alloc (length
);
2002 memset (s
, 0, sizeof (struct tree_typed
));
2003 TREE_SET_CODE (s
, STRING_CST
);
2004 TREE_CONSTANT (s
) = 1;
2005 TREE_STRING_LENGTH (s
) = len
;
2006 memcpy (s
->string
.str
, str
, len
);
2007 s
->string
.str
[len
] = '\0';
2012 /* Return a newly constructed COMPLEX_CST node whose value is
2013 specified by the real and imaginary parts REAL and IMAG.
2014 Both REAL and IMAG should be constant nodes. TYPE, if specified,
2015 will be the type of the COMPLEX_CST; otherwise a new type will be made. */
2018 build_complex (tree type
, tree real
, tree imag
)
2020 tree t
= make_node (COMPLEX_CST
);
2022 TREE_REALPART (t
) = real
;
2023 TREE_IMAGPART (t
) = imag
;
2024 TREE_TYPE (t
) = type
? type
: build_complex_type (TREE_TYPE (real
));
2025 TREE_OVERFLOW (t
) = TREE_OVERFLOW (real
) | TREE_OVERFLOW (imag
);
2029 /* Build a complex (inf +- 0i), such as for the result of cproj.
2030 TYPE is the complex tree type of the result. If NEG is true, the
2031 imaginary zero is negative. */
2034 build_complex_inf (tree type
, bool neg
)
2036 REAL_VALUE_TYPE rinf
, rzero
= dconst0
;
2040 return build_complex (type
, build_real (TREE_TYPE (type
), rinf
),
2041 build_real (TREE_TYPE (type
), rzero
));
2044 /* Return the constant 1 in type TYPE. If TYPE has several elements, each
2045 element is set to 1. In particular, this is 1 + i for complex types. */
2048 build_each_one_cst (tree type
)
2050 if (TREE_CODE (type
) == COMPLEX_TYPE
)
2052 tree scalar
= build_one_cst (TREE_TYPE (type
));
2053 return build_complex (type
, scalar
, scalar
);
2056 return build_one_cst (type
);
2059 /* Return a constant of arithmetic type TYPE which is the
2060 multiplicative identity of the set TYPE. */
2063 build_one_cst (tree type
)
2065 switch (TREE_CODE (type
))
2067 case INTEGER_TYPE
: case ENUMERAL_TYPE
: case BOOLEAN_TYPE
:
2068 case POINTER_TYPE
: case REFERENCE_TYPE
:
2070 return build_int_cst (type
, 1);
2073 return build_real (type
, dconst1
);
2075 case FIXED_POINT_TYPE
:
2076 /* We can only generate 1 for accum types. */
2077 gcc_assert (ALL_SCALAR_ACCUM_MODE_P (TYPE_MODE (type
)));
2078 return build_fixed (type
, FCONST1 (TYPE_MODE (type
)));
2082 tree scalar
= build_one_cst (TREE_TYPE (type
));
2084 return build_vector_from_val (type
, scalar
);
2088 return build_complex (type
,
2089 build_one_cst (TREE_TYPE (type
)),
2090 build_zero_cst (TREE_TYPE (type
)));
2097 /* Return an integer of type TYPE containing all 1's in as much precision as
2098 it contains, or a complex or vector whose subparts are such integers. */
2101 build_all_ones_cst (tree type
)
2103 if (TREE_CODE (type
) == COMPLEX_TYPE
)
2105 tree scalar
= build_all_ones_cst (TREE_TYPE (type
));
2106 return build_complex (type
, scalar
, scalar
);
2109 return build_minus_one_cst (type
);
2112 /* Return a constant of arithmetic type TYPE which is the
2113 opposite of the multiplicative identity of the set TYPE. */
2116 build_minus_one_cst (tree type
)
2118 switch (TREE_CODE (type
))
2120 case INTEGER_TYPE
: case ENUMERAL_TYPE
: case BOOLEAN_TYPE
:
2121 case POINTER_TYPE
: case REFERENCE_TYPE
:
2123 return build_int_cst (type
, -1);
2126 return build_real (type
, dconstm1
);
2128 case FIXED_POINT_TYPE
:
2129 /* We can only generate 1 for accum types. */
2130 gcc_assert (ALL_SCALAR_ACCUM_MODE_P (TYPE_MODE (type
)));
2131 return build_fixed (type
, fixed_from_double_int (double_int_minus_one
,
2136 tree scalar
= build_minus_one_cst (TREE_TYPE (type
));
2138 return build_vector_from_val (type
, scalar
);
2142 return build_complex (type
,
2143 build_minus_one_cst (TREE_TYPE (type
)),
2144 build_zero_cst (TREE_TYPE (type
)));
2151 /* Build 0 constant of type TYPE. This is used by constructor folding
2152 and thus the constant should be represented in memory by
2156 build_zero_cst (tree type
)
2158 switch (TREE_CODE (type
))
2160 case INTEGER_TYPE
: case ENUMERAL_TYPE
: case BOOLEAN_TYPE
:
2161 case POINTER_TYPE
: case REFERENCE_TYPE
:
2162 case OFFSET_TYPE
: case NULLPTR_TYPE
:
2163 return build_int_cst (type
, 0);
2166 return build_real (type
, dconst0
);
2168 case FIXED_POINT_TYPE
:
2169 return build_fixed (type
, FCONST0 (TYPE_MODE (type
)));
2173 tree scalar
= build_zero_cst (TREE_TYPE (type
));
2175 return build_vector_from_val (type
, scalar
);
2180 tree zero
= build_zero_cst (TREE_TYPE (type
));
2182 return build_complex (type
, zero
, zero
);
2186 if (!AGGREGATE_TYPE_P (type
))
2187 return fold_convert (type
, integer_zero_node
);
2188 return build_constructor (type
, NULL
);
2193 /* Build a BINFO with LEN language slots. */
2196 make_tree_binfo_stat (unsigned base_binfos MEM_STAT_DECL
)
2199 size_t length
= (offsetof (struct tree_binfo
, base_binfos
)
2200 + vec
<tree
, va_gc
>::embedded_size (base_binfos
));
2202 record_node_allocation_statistics (TREE_BINFO
, length
);
2204 t
= ggc_alloc_tree_node_stat (length PASS_MEM_STAT
);
2206 memset (t
, 0, offsetof (struct tree_binfo
, base_binfos
));
2208 TREE_SET_CODE (t
, TREE_BINFO
);
2210 BINFO_BASE_BINFOS (t
)->embedded_init (base_binfos
);
2215 /* Create a CASE_LABEL_EXPR tree node and return it. */
2218 build_case_label (tree low_value
, tree high_value
, tree label_decl
)
2220 tree t
= make_node (CASE_LABEL_EXPR
);
2222 TREE_TYPE (t
) = void_type_node
;
2223 SET_EXPR_LOCATION (t
, DECL_SOURCE_LOCATION (label_decl
));
2225 CASE_LOW (t
) = low_value
;
2226 CASE_HIGH (t
) = high_value
;
2227 CASE_LABEL (t
) = label_decl
;
2228 CASE_CHAIN (t
) = NULL_TREE
;
2233 /* Build a newly constructed INTEGER_CST node. LEN and EXT_LEN are the
2234 values of TREE_INT_CST_NUNITS and TREE_INT_CST_EXT_NUNITS respectively.
2235 The latter determines the length of the HOST_WIDE_INT vector. */
2238 make_int_cst_stat (int len
, int ext_len MEM_STAT_DECL
)
2241 int length
= ((ext_len
- 1) * sizeof (HOST_WIDE_INT
)
2242 + sizeof (struct tree_int_cst
));
2245 record_node_allocation_statistics (INTEGER_CST
, length
);
2247 t
= ggc_alloc_cleared_tree_node_stat (length PASS_MEM_STAT
);
2249 TREE_SET_CODE (t
, INTEGER_CST
);
2250 TREE_INT_CST_NUNITS (t
) = len
;
2251 TREE_INT_CST_EXT_NUNITS (t
) = ext_len
;
2252 /* to_offset can only be applied to trees that are offset_int-sized
2253 or smaller. EXT_LEN is correct if it fits, otherwise the constant
2254 must be exactly the precision of offset_int and so LEN is correct. */
2255 if (ext_len
<= OFFSET_INT_ELTS
)
2256 TREE_INT_CST_OFFSET_NUNITS (t
) = ext_len
;
2258 TREE_INT_CST_OFFSET_NUNITS (t
) = len
;
2260 TREE_CONSTANT (t
) = 1;
2265 /* Build a newly constructed TREE_VEC node of length LEN. */
2268 make_tree_vec_stat (int len MEM_STAT_DECL
)
2271 size_t length
= (len
- 1) * sizeof (tree
) + sizeof (struct tree_vec
);
2273 record_node_allocation_statistics (TREE_VEC
, length
);
2275 t
= ggc_alloc_cleared_tree_node_stat (length PASS_MEM_STAT
);
2277 TREE_SET_CODE (t
, TREE_VEC
);
2278 TREE_VEC_LENGTH (t
) = len
;
2283 /* Grow a TREE_VEC node to new length LEN. */
2286 grow_tree_vec_stat (tree v
, int len MEM_STAT_DECL
)
2288 gcc_assert (TREE_CODE (v
) == TREE_VEC
);
2290 int oldlen
= TREE_VEC_LENGTH (v
);
2291 gcc_assert (len
> oldlen
);
2293 size_t oldlength
= (oldlen
- 1) * sizeof (tree
) + sizeof (struct tree_vec
);
2294 size_t length
= (len
- 1) * sizeof (tree
) + sizeof (struct tree_vec
);
2296 record_node_allocation_statistics (TREE_VEC
, length
- oldlength
);
2298 v
= (tree
) ggc_realloc (v
, length PASS_MEM_STAT
);
2300 TREE_VEC_LENGTH (v
) = len
;
2305 /* Return 1 if EXPR is the constant zero, whether it is integral, float or
2306 fixed, and scalar, complex or vector. */
2309 zerop (const_tree expr
)
2311 return (integer_zerop (expr
)
2312 || real_zerop (expr
)
2313 || fixed_zerop (expr
));
2316 /* Return 1 if EXPR is the integer constant zero or a complex constant
2320 integer_zerop (const_tree expr
)
2322 switch (TREE_CODE (expr
))
2325 return wi::eq_p (expr
, 0);
2327 return (integer_zerop (TREE_REALPART (expr
))
2328 && integer_zerop (TREE_IMAGPART (expr
)));
2332 for (i
= 0; i
< VECTOR_CST_NELTS (expr
); ++i
)
2333 if (!integer_zerop (VECTOR_CST_ELT (expr
, i
)))
2342 /* Return 1 if EXPR is the integer constant one or the corresponding
2343 complex constant. */
2346 integer_onep (const_tree expr
)
2348 switch (TREE_CODE (expr
))
2351 return wi::eq_p (wi::to_widest (expr
), 1);
2353 return (integer_onep (TREE_REALPART (expr
))
2354 && integer_zerop (TREE_IMAGPART (expr
)));
2358 for (i
= 0; i
< VECTOR_CST_NELTS (expr
); ++i
)
2359 if (!integer_onep (VECTOR_CST_ELT (expr
, i
)))
2368 /* Return 1 if EXPR is the integer constant one. For complex and vector,
2369 return 1 if every piece is the integer constant one. */
2372 integer_each_onep (const_tree expr
)
2374 if (TREE_CODE (expr
) == COMPLEX_CST
)
2375 return (integer_onep (TREE_REALPART (expr
))
2376 && integer_onep (TREE_IMAGPART (expr
)));
2378 return integer_onep (expr
);
2381 /* Return 1 if EXPR is an integer containing all 1's in as much precision as
2382 it contains, or a complex or vector whose subparts are such integers. */
2385 integer_all_onesp (const_tree expr
)
2387 if (TREE_CODE (expr
) == COMPLEX_CST
2388 && integer_all_onesp (TREE_REALPART (expr
))
2389 && integer_all_onesp (TREE_IMAGPART (expr
)))
2392 else if (TREE_CODE (expr
) == VECTOR_CST
)
2395 for (i
= 0; i
< VECTOR_CST_NELTS (expr
); ++i
)
2396 if (!integer_all_onesp (VECTOR_CST_ELT (expr
, i
)))
2401 else if (TREE_CODE (expr
) != INTEGER_CST
)
2404 return wi::max_value (TYPE_PRECISION (TREE_TYPE (expr
)), UNSIGNED
) == expr
;
2407 /* Return 1 if EXPR is the integer constant minus one. */
2410 integer_minus_onep (const_tree expr
)
2412 if (TREE_CODE (expr
) == COMPLEX_CST
)
2413 return (integer_all_onesp (TREE_REALPART (expr
))
2414 && integer_zerop (TREE_IMAGPART (expr
)));
2416 return integer_all_onesp (expr
);
2419 /* Return 1 if EXPR is an integer constant that is a power of 2 (i.e., has only
2423 integer_pow2p (const_tree expr
)
2425 if (TREE_CODE (expr
) == COMPLEX_CST
2426 && integer_pow2p (TREE_REALPART (expr
))
2427 && integer_zerop (TREE_IMAGPART (expr
)))
2430 if (TREE_CODE (expr
) != INTEGER_CST
)
2433 return wi::popcount (expr
) == 1;
2436 /* Return 1 if EXPR is an integer constant other than zero or a
2437 complex constant other than zero. */
2440 integer_nonzerop (const_tree expr
)
2442 return ((TREE_CODE (expr
) == INTEGER_CST
2443 && !wi::eq_p (expr
, 0))
2444 || (TREE_CODE (expr
) == COMPLEX_CST
2445 && (integer_nonzerop (TREE_REALPART (expr
))
2446 || integer_nonzerop (TREE_IMAGPART (expr
)))));
2449 /* Return 1 if EXPR is the integer constant one. For vector,
2450 return 1 if every piece is the integer constant minus one
2451 (representing the value TRUE). */
2454 integer_truep (const_tree expr
)
2456 if (TREE_CODE (expr
) == VECTOR_CST
)
2457 return integer_all_onesp (expr
);
2458 return integer_onep (expr
);
2461 /* Return 1 if EXPR is the fixed-point constant zero. */
2464 fixed_zerop (const_tree expr
)
2466 return (TREE_CODE (expr
) == FIXED_CST
2467 && TREE_FIXED_CST (expr
).data
.is_zero ());
2470 /* Return the power of two represented by a tree node known to be a
2474 tree_log2 (const_tree expr
)
2476 if (TREE_CODE (expr
) == COMPLEX_CST
)
2477 return tree_log2 (TREE_REALPART (expr
));
2479 return wi::exact_log2 (expr
);
2482 /* Similar, but return the largest integer Y such that 2 ** Y is less
2483 than or equal to EXPR. */
2486 tree_floor_log2 (const_tree expr
)
2488 if (TREE_CODE (expr
) == COMPLEX_CST
)
2489 return tree_log2 (TREE_REALPART (expr
));
2491 return wi::floor_log2 (expr
);
2494 /* Return number of known trailing zero bits in EXPR, or, if the value of
2495 EXPR is known to be zero, the precision of it's type. */
2498 tree_ctz (const_tree expr
)
2500 if (!INTEGRAL_TYPE_P (TREE_TYPE (expr
))
2501 && !POINTER_TYPE_P (TREE_TYPE (expr
)))
2504 unsigned int ret1
, ret2
, prec
= TYPE_PRECISION (TREE_TYPE (expr
));
2505 switch (TREE_CODE (expr
))
2508 ret1
= wi::ctz (expr
);
2509 return MIN (ret1
, prec
);
2511 ret1
= wi::ctz (get_nonzero_bits (expr
));
2512 return MIN (ret1
, prec
);
2519 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2522 ret2
= tree_ctz (TREE_OPERAND (expr
, 1));
2523 return MIN (ret1
, ret2
);
2524 case POINTER_PLUS_EXPR
:
2525 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2526 ret2
= tree_ctz (TREE_OPERAND (expr
, 1));
2527 /* Second operand is sizetype, which could be in theory
2528 wider than pointer's precision. Make sure we never
2529 return more than prec. */
2530 ret2
= MIN (ret2
, prec
);
2531 return MIN (ret1
, ret2
);
2533 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2534 ret2
= tree_ctz (TREE_OPERAND (expr
, 1));
2535 return MAX (ret1
, ret2
);
2537 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2538 ret2
= tree_ctz (TREE_OPERAND (expr
, 1));
2539 return MIN (ret1
+ ret2
, prec
);
2541 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2542 if (tree_fits_uhwi_p (TREE_OPERAND (expr
, 1))
2543 && (tree_to_uhwi (TREE_OPERAND (expr
, 1)) < prec
))
2545 ret2
= tree_to_uhwi (TREE_OPERAND (expr
, 1));
2546 return MIN (ret1
+ ret2
, prec
);
2550 if (tree_fits_uhwi_p (TREE_OPERAND (expr
, 1))
2551 && (tree_to_uhwi (TREE_OPERAND (expr
, 1)) < prec
))
2553 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2554 ret2
= tree_to_uhwi (TREE_OPERAND (expr
, 1));
2559 case TRUNC_DIV_EXPR
:
2561 case FLOOR_DIV_EXPR
:
2562 case ROUND_DIV_EXPR
:
2563 case EXACT_DIV_EXPR
:
2564 if (TREE_CODE (TREE_OPERAND (expr
, 1)) == INTEGER_CST
2565 && tree_int_cst_sgn (TREE_OPERAND (expr
, 1)) == 1)
2567 int l
= tree_log2 (TREE_OPERAND (expr
, 1));
2570 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2578 ret1
= tree_ctz (TREE_OPERAND (expr
, 0));
2579 if (ret1
&& ret1
== TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (expr
, 0))))
2581 return MIN (ret1
, prec
);
2583 return tree_ctz (TREE_OPERAND (expr
, 0));
2585 ret1
= tree_ctz (TREE_OPERAND (expr
, 1));
2588 ret2
= tree_ctz (TREE_OPERAND (expr
, 2));
2589 return MIN (ret1
, ret2
);
2591 return tree_ctz (TREE_OPERAND (expr
, 1));
2593 ret1
= get_pointer_alignment (CONST_CAST_TREE (expr
));
2594 if (ret1
> BITS_PER_UNIT
)
2596 ret1
= ctz_hwi (ret1
/ BITS_PER_UNIT
);
2597 return MIN (ret1
, prec
);
2605 /* Return 1 if EXPR is the real constant zero. Trailing zeroes matter for
2606 decimal float constants, so don't return 1 for them. */
2609 real_zerop (const_tree expr
)
2611 switch (TREE_CODE (expr
))
2614 return real_equal (&TREE_REAL_CST (expr
), &dconst0
)
2615 && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr
))));
2617 return real_zerop (TREE_REALPART (expr
))
2618 && real_zerop (TREE_IMAGPART (expr
));
2622 for (i
= 0; i
< VECTOR_CST_NELTS (expr
); ++i
)
2623 if (!real_zerop (VECTOR_CST_ELT (expr
, i
)))
2632 /* Return 1 if EXPR is the real constant one in real or complex form.
2633 Trailing zeroes matter for decimal float constants, so don't return
2637 real_onep (const_tree expr
)
2639 switch (TREE_CODE (expr
))
2642 return real_equal (&TREE_REAL_CST (expr
), &dconst1
)
2643 && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr
))));
2645 return real_onep (TREE_REALPART (expr
))
2646 && real_zerop (TREE_IMAGPART (expr
));
2650 for (i
= 0; i
< VECTOR_CST_NELTS (expr
); ++i
)
2651 if (!real_onep (VECTOR_CST_ELT (expr
, i
)))
2660 /* Return 1 if EXPR is the real constant minus one. Trailing zeroes
2661 matter for decimal float constants, so don't return 1 for them. */
2664 real_minus_onep (const_tree expr
)
2666 switch (TREE_CODE (expr
))
2669 return real_equal (&TREE_REAL_CST (expr
), &dconstm1
)
2670 && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr
))));
2672 return real_minus_onep (TREE_REALPART (expr
))
2673 && real_zerop (TREE_IMAGPART (expr
));
2677 for (i
= 0; i
< VECTOR_CST_NELTS (expr
); ++i
)
2678 if (!real_minus_onep (VECTOR_CST_ELT (expr
, i
)))
2687 /* Nonzero if EXP is a constant or a cast of a constant. */
2690 really_constant_p (const_tree exp
)
2692 /* This is not quite the same as STRIP_NOPS. It does more. */
2693 while (CONVERT_EXPR_P (exp
)
2694 || TREE_CODE (exp
) == NON_LVALUE_EXPR
)
2695 exp
= TREE_OPERAND (exp
, 0);
2696 return TREE_CONSTANT (exp
);
2699 /* Return first list element whose TREE_VALUE is ELEM.
2700 Return 0 if ELEM is not in LIST. */
2703 value_member (tree elem
, tree list
)
2707 if (elem
== TREE_VALUE (list
))
2709 list
= TREE_CHAIN (list
);
2714 /* Return first list element whose TREE_PURPOSE is ELEM.
2715 Return 0 if ELEM is not in LIST. */
2718 purpose_member (const_tree elem
, tree list
)
2722 if (elem
== TREE_PURPOSE (list
))
2724 list
= TREE_CHAIN (list
);
2729 /* Return true if ELEM is in V. */
2732 vec_member (const_tree elem
, vec
<tree
, va_gc
> *v
)
2736 FOR_EACH_VEC_SAFE_ELT (v
, ix
, t
)
2742 /* Returns element number IDX (zero-origin) of chain CHAIN, or
2746 chain_index (int idx
, tree chain
)
2748 for (; chain
&& idx
> 0; --idx
)
2749 chain
= TREE_CHAIN (chain
);
2753 /* Return nonzero if ELEM is part of the chain CHAIN. */
2756 chain_member (const_tree elem
, const_tree chain
)
2762 chain
= DECL_CHAIN (chain
);
2768 /* Return the length of a chain of nodes chained through TREE_CHAIN.
2769 We expect a null pointer to mark the end of the chain.
2770 This is the Lisp primitive `length'. */
2773 list_length (const_tree t
)
2776 #ifdef ENABLE_TREE_CHECKING
2784 #ifdef ENABLE_TREE_CHECKING
2787 gcc_assert (p
!= q
);
2795 /* Returns the first FIELD_DECL in the TYPE_FIELDS of the RECORD_TYPE or
2796 UNION_TYPE TYPE, or NULL_TREE if none. */
2799 first_field (const_tree type
)
2801 tree t
= TYPE_FIELDS (type
);
2802 while (t
&& TREE_CODE (t
) != FIELD_DECL
)
2807 /* Concatenate two chains of nodes (chained through TREE_CHAIN)
2808 by modifying the last node in chain 1 to point to chain 2.
2809 This is the Lisp primitive `nconc'. */
2812 chainon (tree op1
, tree op2
)
2821 for (t1
= op1
; TREE_CHAIN (t1
); t1
= TREE_CHAIN (t1
))
2823 TREE_CHAIN (t1
) = op2
;
2825 #ifdef ENABLE_TREE_CHECKING
2828 for (t2
= op2
; t2
; t2
= TREE_CHAIN (t2
))
2829 gcc_assert (t2
!= t1
);
2836 /* Return the last node in a chain of nodes (chained through TREE_CHAIN). */
2839 tree_last (tree chain
)
2843 while ((next
= TREE_CHAIN (chain
)))
2848 /* Reverse the order of elements in the chain T,
2849 and return the new head of the chain (old last element). */
2854 tree prev
= 0, decl
, next
;
2855 for (decl
= t
; decl
; decl
= next
)
2857 /* We shouldn't be using this function to reverse BLOCK chains; we
2858 have blocks_nreverse for that. */
2859 gcc_checking_assert (TREE_CODE (decl
) != BLOCK
);
2860 next
= TREE_CHAIN (decl
);
2861 TREE_CHAIN (decl
) = prev
;
2867 /* Return a newly created TREE_LIST node whose
2868 purpose and value fields are PARM and VALUE. */
2871 build_tree_list_stat (tree parm
, tree value MEM_STAT_DECL
)
2873 tree t
= make_node_stat (TREE_LIST PASS_MEM_STAT
);
2874 TREE_PURPOSE (t
) = parm
;
2875 TREE_VALUE (t
) = value
;
2879 /* Build a chain of TREE_LIST nodes from a vector. */
2882 build_tree_list_vec_stat (const vec
<tree
, va_gc
> *vec MEM_STAT_DECL
)
2884 tree ret
= NULL_TREE
;
2888 FOR_EACH_VEC_SAFE_ELT (vec
, i
, t
)
2890 *pp
= build_tree_list_stat (NULL
, t PASS_MEM_STAT
);
2891 pp
= &TREE_CHAIN (*pp
);
2896 /* Return a newly created TREE_LIST node whose
2897 purpose and value fields are PURPOSE and VALUE
2898 and whose TREE_CHAIN is CHAIN. */
2901 tree_cons_stat (tree purpose
, tree value
, tree chain MEM_STAT_DECL
)
2905 node
= ggc_alloc_tree_node_stat (sizeof (struct tree_list
) PASS_MEM_STAT
);
2906 memset (node
, 0, sizeof (struct tree_common
));
2908 record_node_allocation_statistics (TREE_LIST
, sizeof (struct tree_list
));
2910 TREE_SET_CODE (node
, TREE_LIST
);
2911 TREE_CHAIN (node
) = chain
;
2912 TREE_PURPOSE (node
) = purpose
;
2913 TREE_VALUE (node
) = value
;
2917 /* Return the values of the elements of a CONSTRUCTOR as a vector of
2921 ctor_to_vec (tree ctor
)
2923 vec
<tree
, va_gc
> *vec
;
2924 vec_alloc (vec
, CONSTRUCTOR_NELTS (ctor
));
2928 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (ctor
), ix
, val
)
2929 vec
->quick_push (val
);
2934 /* Return the size nominally occupied by an object of type TYPE
2935 when it resides in memory. The value is measured in units of bytes,
2936 and its data type is that normally used for type sizes
2937 (which is the first type created by make_signed_type or
2938 make_unsigned_type). */
2941 size_in_bytes_loc (location_t loc
, const_tree type
)
2945 if (type
== error_mark_node
)
2946 return integer_zero_node
;
2948 type
= TYPE_MAIN_VARIANT (type
);
2949 t
= TYPE_SIZE_UNIT (type
);
2953 lang_hooks
.types
.incomplete_type_error (loc
, NULL_TREE
, type
);
2954 return size_zero_node
;
2960 /* Return the size of TYPE (in bytes) as a wide integer
2961 or return -1 if the size can vary or is larger than an integer. */
2964 int_size_in_bytes (const_tree type
)
2968 if (type
== error_mark_node
)
2971 type
= TYPE_MAIN_VARIANT (type
);
2972 t
= TYPE_SIZE_UNIT (type
);
2974 if (t
&& tree_fits_uhwi_p (t
))
2975 return TREE_INT_CST_LOW (t
);
2980 /* Return the maximum size of TYPE (in bytes) as a wide integer
2981 or return -1 if the size can vary or is larger than an integer. */
2984 max_int_size_in_bytes (const_tree type
)
2986 HOST_WIDE_INT size
= -1;
2989 /* If this is an array type, check for a possible MAX_SIZE attached. */
2991 if (TREE_CODE (type
) == ARRAY_TYPE
)
2993 size_tree
= TYPE_ARRAY_MAX_SIZE (type
);
2995 if (size_tree
&& tree_fits_uhwi_p (size_tree
))
2996 size
= tree_to_uhwi (size_tree
);
2999 /* If we still haven't been able to get a size, see if the language
3000 can compute a maximum size. */
3004 size_tree
= lang_hooks
.types
.max_size (type
);
3006 if (size_tree
&& tree_fits_uhwi_p (size_tree
))
3007 size
= tree_to_uhwi (size_tree
);
3013 /* Return the bit position of FIELD, in bits from the start of the record.
3014 This is a tree of type bitsizetype. */
3017 bit_position (const_tree field
)
3019 return bit_from_pos (DECL_FIELD_OFFSET (field
),
3020 DECL_FIELD_BIT_OFFSET (field
));
3023 /* Return the byte position of FIELD, in bytes from the start of the record.
3024 This is a tree of type sizetype. */
3027 byte_position (const_tree field
)
3029 return byte_from_pos (DECL_FIELD_OFFSET (field
),
3030 DECL_FIELD_BIT_OFFSET (field
));
3033 /* Likewise, but return as an integer. It must be representable in
3034 that way (since it could be a signed value, we don't have the
3035 option of returning -1 like int_size_in_byte can. */
3038 int_byte_position (const_tree field
)
3040 return tree_to_shwi (byte_position (field
));
3043 /* Return the strictest alignment, in bits, that T is known to have. */
3046 expr_align (const_tree t
)
3048 unsigned int align0
, align1
;
3050 switch (TREE_CODE (t
))
3052 CASE_CONVERT
: case NON_LVALUE_EXPR
:
3053 /* If we have conversions, we know that the alignment of the
3054 object must meet each of the alignments of the types. */
3055 align0
= expr_align (TREE_OPERAND (t
, 0));
3056 align1
= TYPE_ALIGN (TREE_TYPE (t
));
3057 return MAX (align0
, align1
);
3059 case SAVE_EXPR
: case COMPOUND_EXPR
: case MODIFY_EXPR
:
3060 case INIT_EXPR
: case TARGET_EXPR
: case WITH_CLEANUP_EXPR
:
3061 case CLEANUP_POINT_EXPR
:
3062 /* These don't change the alignment of an object. */
3063 return expr_align (TREE_OPERAND (t
, 0));
3066 /* The best we can do is say that the alignment is the least aligned
3068 align0
= expr_align (TREE_OPERAND (t
, 1));
3069 align1
= expr_align (TREE_OPERAND (t
, 2));
3070 return MIN (align0
, align1
);
3072 /* FIXME: LABEL_DECL and CONST_DECL never have DECL_ALIGN set
3073 meaningfully, it's always 1. */
3074 case LABEL_DECL
: case CONST_DECL
:
3075 case VAR_DECL
: case PARM_DECL
: case RESULT_DECL
:
3077 gcc_assert (DECL_ALIGN (t
) != 0);
3078 return DECL_ALIGN (t
);
3084 /* Otherwise take the alignment from that of the type. */
3085 return TYPE_ALIGN (TREE_TYPE (t
));
3088 /* Return, as a tree node, the number of elements for TYPE (which is an
3089 ARRAY_TYPE) minus one. This counts only elements of the top array. */
3092 array_type_nelts (const_tree type
)
3094 tree index_type
, min
, max
;
3096 /* If they did it with unspecified bounds, then we should have already
3097 given an error about it before we got here. */
3098 if (! TYPE_DOMAIN (type
))
3099 return error_mark_node
;
3101 index_type
= TYPE_DOMAIN (type
);
3102 min
= TYPE_MIN_VALUE (index_type
);
3103 max
= TYPE_MAX_VALUE (index_type
);
3105 /* TYPE_MAX_VALUE may not be set if the array has unknown length. */
3107 return error_mark_node
;
3109 return (integer_zerop (min
)
3111 : fold_build2 (MINUS_EXPR
, TREE_TYPE (max
), max
, min
));
3114 /* If arg is static -- a reference to an object in static storage -- then
3115 return the object. This is not the same as the C meaning of `static'.
3116 If arg isn't static, return NULL. */
3121 switch (TREE_CODE (arg
))
3124 /* Nested functions are static, even though taking their address will
3125 involve a trampoline as we unnest the nested function and create
3126 the trampoline on the tree level. */
3130 return ((TREE_STATIC (arg
) || DECL_EXTERNAL (arg
))
3131 && ! DECL_THREAD_LOCAL_P (arg
)
3132 && ! DECL_DLLIMPORT_P (arg
)
3136 return ((TREE_STATIC (arg
) || DECL_EXTERNAL (arg
))
3140 return TREE_STATIC (arg
) ? arg
: NULL
;
3147 /* If the thing being referenced is not a field, then it is
3148 something language specific. */
3149 gcc_assert (TREE_CODE (TREE_OPERAND (arg
, 1)) == FIELD_DECL
);
3151 /* If we are referencing a bitfield, we can't evaluate an
3152 ADDR_EXPR at compile time and so it isn't a constant. */
3153 if (DECL_BIT_FIELD (TREE_OPERAND (arg
, 1)))
3156 return staticp (TREE_OPERAND (arg
, 0));
3162 return TREE_CONSTANT (TREE_OPERAND (arg
, 0)) ? arg
: NULL
;
3165 case ARRAY_RANGE_REF
:
3166 if (TREE_CODE (TYPE_SIZE (TREE_TYPE (arg
))) == INTEGER_CST
3167 && TREE_CODE (TREE_OPERAND (arg
, 1)) == INTEGER_CST
)
3168 return staticp (TREE_OPERAND (arg
, 0));
3172 case COMPOUND_LITERAL_EXPR
:
3173 return TREE_STATIC (COMPOUND_LITERAL_EXPR_DECL (arg
)) ? arg
: NULL
;
3183 /* Return whether OP is a DECL whose address is function-invariant. */
3186 decl_address_invariant_p (const_tree op
)
3188 /* The conditions below are slightly less strict than the one in
3191 switch (TREE_CODE (op
))
3200 if ((TREE_STATIC (op
) || DECL_EXTERNAL (op
))
3201 || DECL_THREAD_LOCAL_P (op
)
3202 || DECL_CONTEXT (op
) == current_function_decl
3203 || decl_function_context (op
) == current_function_decl
)
3208 if ((TREE_STATIC (op
) || DECL_EXTERNAL (op
))
3209 || decl_function_context (op
) == current_function_decl
)
3220 /* Return whether OP is a DECL whose address is interprocedural-invariant. */
3223 decl_address_ip_invariant_p (const_tree op
)
3225 /* The conditions below are slightly less strict than the one in
3228 switch (TREE_CODE (op
))
3236 if (((TREE_STATIC (op
) || DECL_EXTERNAL (op
))
3237 && !DECL_DLLIMPORT_P (op
))
3238 || DECL_THREAD_LOCAL_P (op
))
3243 if ((TREE_STATIC (op
) || DECL_EXTERNAL (op
)))
3255 /* Return true if T is function-invariant (internal function, does
3256 not handle arithmetic; that's handled in skip_simple_arithmetic and
3257 tree_invariant_p). */
3260 tree_invariant_p_1 (tree t
)
3264 if (TREE_CONSTANT (t
)
3265 || (TREE_READONLY (t
) && !TREE_SIDE_EFFECTS (t
)))
3268 switch (TREE_CODE (t
))
3274 op
= TREE_OPERAND (t
, 0);
3275 while (handled_component_p (op
))
3277 switch (TREE_CODE (op
))
3280 case ARRAY_RANGE_REF
:
3281 if (!tree_invariant_p (TREE_OPERAND (op
, 1))
3282 || TREE_OPERAND (op
, 2) != NULL_TREE
3283 || TREE_OPERAND (op
, 3) != NULL_TREE
)
3288 if (TREE_OPERAND (op
, 2) != NULL_TREE
)
3294 op
= TREE_OPERAND (op
, 0);
3297 return CONSTANT_CLASS_P (op
) || decl_address_invariant_p (op
);
3306 /* Return true if T is function-invariant. */
3309 tree_invariant_p (tree t
)
3311 tree inner
= skip_simple_arithmetic (t
);
3312 return tree_invariant_p_1 (inner
);
3315 /* Wrap a SAVE_EXPR around EXPR, if appropriate.
3316 Do this to any expression which may be used in more than one place,
3317 but must be evaluated only once.
3319 Normally, expand_expr would reevaluate the expression each time.
3320 Calling save_expr produces something that is evaluated and recorded
3321 the first time expand_expr is called on it. Subsequent calls to
3322 expand_expr just reuse the recorded value.
3324 The call to expand_expr that generates code that actually computes
3325 the value is the first call *at compile time*. Subsequent calls
3326 *at compile time* generate code to use the saved value.
3327 This produces correct result provided that *at run time* control
3328 always flows through the insns made by the first expand_expr
3329 before reaching the other places where the save_expr was evaluated.
3330 You, the caller of save_expr, must make sure this is so.
3332 Constants, and certain read-only nodes, are returned with no
3333 SAVE_EXPR because that is safe. Expressions containing placeholders
3334 are not touched; see tree.def for an explanation of what these
3338 save_expr (tree expr
)
3342 /* If the tree evaluates to a constant, then we don't want to hide that
3343 fact (i.e. this allows further folding, and direct checks for constants).
3344 However, a read-only object that has side effects cannot be bypassed.
3345 Since it is no problem to reevaluate literals, we just return the
3347 inner
= skip_simple_arithmetic (expr
);
3348 if (TREE_CODE (inner
) == ERROR_MARK
)
3351 if (tree_invariant_p_1 (inner
))
3354 /* If INNER contains a PLACEHOLDER_EXPR, we must evaluate it each time, since
3355 it means that the size or offset of some field of an object depends on
3356 the value within another field.
3358 Note that it must not be the case that EXPR contains both a PLACEHOLDER_EXPR
3359 and some variable since it would then need to be both evaluated once and
3360 evaluated more than once. Front-ends must assure this case cannot
3361 happen by surrounding any such subexpressions in their own SAVE_EXPR
3362 and forcing evaluation at the proper time. */
3363 if (contains_placeholder_p (inner
))
3366 expr
= build1_loc (EXPR_LOCATION (expr
), SAVE_EXPR
, TREE_TYPE (expr
), expr
);
3368 /* This expression might be placed ahead of a jump to ensure that the
3369 value was computed on both sides of the jump. So make sure it isn't
3370 eliminated as dead. */
3371 TREE_SIDE_EFFECTS (expr
) = 1;
3375 /* Look inside EXPR into any simple arithmetic operations. Return the
3376 outermost non-arithmetic or non-invariant node. */
3379 skip_simple_arithmetic (tree expr
)
3381 /* We don't care about whether this can be used as an lvalue in this
3383 while (TREE_CODE (expr
) == NON_LVALUE_EXPR
)
3384 expr
= TREE_OPERAND (expr
, 0);
3386 /* If we have simple operations applied to a SAVE_EXPR or to a SAVE_EXPR and
3387 a constant, it will be more efficient to not make another SAVE_EXPR since
3388 it will allow better simplification and GCSE will be able to merge the
3389 computations if they actually occur. */
3392 if (UNARY_CLASS_P (expr
))
3393 expr
= TREE_OPERAND (expr
, 0);
3394 else if (BINARY_CLASS_P (expr
))
3396 if (tree_invariant_p (TREE_OPERAND (expr
, 1)))
3397 expr
= TREE_OPERAND (expr
, 0);
3398 else if (tree_invariant_p (TREE_OPERAND (expr
, 0)))
3399 expr
= TREE_OPERAND (expr
, 1);
3410 /* Look inside EXPR into simple arithmetic operations involving constants.
3411 Return the outermost non-arithmetic or non-constant node. */
3414 skip_simple_constant_arithmetic (tree expr
)
3416 while (TREE_CODE (expr
) == NON_LVALUE_EXPR
)
3417 expr
= TREE_OPERAND (expr
, 0);
3421 if (UNARY_CLASS_P (expr
))
3422 expr
= TREE_OPERAND (expr
, 0);
3423 else if (BINARY_CLASS_P (expr
))
3425 if (TREE_CONSTANT (TREE_OPERAND (expr
, 1)))
3426 expr
= TREE_OPERAND (expr
, 0);
3427 else if (TREE_CONSTANT (TREE_OPERAND (expr
, 0)))
3428 expr
= TREE_OPERAND (expr
, 1);
3439 /* Return which tree structure is used by T. */
3441 enum tree_node_structure_enum
3442 tree_node_structure (const_tree t
)
3444 const enum tree_code code
= TREE_CODE (t
);
3445 return tree_node_structure_for_code (code
);
3448 /* Set various status flags when building a CALL_EXPR object T. */
3451 process_call_operands (tree t
)
3453 bool side_effects
= TREE_SIDE_EFFECTS (t
);
3454 bool read_only
= false;
3455 int i
= call_expr_flags (t
);
3457 /* Calls have side-effects, except those to const or pure functions. */
3458 if ((i
& ECF_LOOPING_CONST_OR_PURE
) || !(i
& (ECF_CONST
| ECF_PURE
)))
3459 side_effects
= true;
3460 /* Propagate TREE_READONLY of arguments for const functions. */
3464 if (!side_effects
|| read_only
)
3465 for (i
= 1; i
< TREE_OPERAND_LENGTH (t
); i
++)
3467 tree op
= TREE_OPERAND (t
, i
);
3468 if (op
&& TREE_SIDE_EFFECTS (op
))
3469 side_effects
= true;
3470 if (op
&& !TREE_READONLY (op
) && !CONSTANT_CLASS_P (op
))
3474 TREE_SIDE_EFFECTS (t
) = side_effects
;
3475 TREE_READONLY (t
) = read_only
;
3478 /* Return true if EXP contains a PLACEHOLDER_EXPR, i.e. if it represents a
3479 size or offset that depends on a field within a record. */
3482 contains_placeholder_p (const_tree exp
)
3484 enum tree_code code
;
3489 code
= TREE_CODE (exp
);
3490 if (code
== PLACEHOLDER_EXPR
)
3493 switch (TREE_CODE_CLASS (code
))
3496 /* Don't look at any PLACEHOLDER_EXPRs that might be in index or bit
3497 position computations since they will be converted into a
3498 WITH_RECORD_EXPR involving the reference, which will assume
3499 here will be valid. */
3500 return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0));
3502 case tcc_exceptional
:
3503 if (code
== TREE_LIST
)
3504 return (CONTAINS_PLACEHOLDER_P (TREE_VALUE (exp
))
3505 || CONTAINS_PLACEHOLDER_P (TREE_CHAIN (exp
)));
3510 case tcc_comparison
:
3511 case tcc_expression
:
3515 /* Ignoring the first operand isn't quite right, but works best. */
3516 return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 1));
3519 return (CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0))
3520 || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 1))
3521 || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 2)));
3524 /* The save_expr function never wraps anything containing
3525 a PLACEHOLDER_EXPR. */
3532 switch (TREE_CODE_LENGTH (code
))
3535 return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0));
3537 return (CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0))
3538 || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 1)));
3549 const_call_expr_arg_iterator iter
;
3550 FOR_EACH_CONST_CALL_EXPR_ARG (arg
, iter
, exp
)
3551 if (CONTAINS_PLACEHOLDER_P (arg
))
3565 /* Return true if any part of the structure of TYPE involves a PLACEHOLDER_EXPR
3566 directly. This includes size, bounds, qualifiers (for QUAL_UNION_TYPE) and
3570 type_contains_placeholder_1 (const_tree type
)
3572 /* If the size contains a placeholder or the parent type (component type in
3573 the case of arrays) type involves a placeholder, this type does. */
3574 if (CONTAINS_PLACEHOLDER_P (TYPE_SIZE (type
))
3575 || CONTAINS_PLACEHOLDER_P (TYPE_SIZE_UNIT (type
))
3576 || (!POINTER_TYPE_P (type
)
3578 && type_contains_placeholder_p (TREE_TYPE (type
))))
3581 /* Now do type-specific checks. Note that the last part of the check above
3582 greatly limits what we have to do below. */
3583 switch (TREE_CODE (type
))
3586 case POINTER_BOUNDS_TYPE
:
3592 case REFERENCE_TYPE
:
3601 case FIXED_POINT_TYPE
:
3602 /* Here we just check the bounds. */
3603 return (CONTAINS_PLACEHOLDER_P (TYPE_MIN_VALUE (type
))
3604 || CONTAINS_PLACEHOLDER_P (TYPE_MAX_VALUE (type
)));
3607 /* We have already checked the component type above, so just check
3608 the domain type. Flexible array members have a null domain. */
3609 return TYPE_DOMAIN (type
) ?
3610 type_contains_placeholder_p (TYPE_DOMAIN (type
)) : false;
3614 case QUAL_UNION_TYPE
:
3618 for (field
= TYPE_FIELDS (type
); field
; field
= DECL_CHAIN (field
))
3619 if (TREE_CODE (field
) == FIELD_DECL
3620 && (CONTAINS_PLACEHOLDER_P (DECL_FIELD_OFFSET (field
))
3621 || (TREE_CODE (type
) == QUAL_UNION_TYPE
3622 && CONTAINS_PLACEHOLDER_P (DECL_QUALIFIER (field
)))
3623 || type_contains_placeholder_p (TREE_TYPE (field
))))
3634 /* Wrapper around above function used to cache its result. */
3637 type_contains_placeholder_p (tree type
)
3641 /* If the contains_placeholder_bits field has been initialized,
3642 then we know the answer. */
3643 if (TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) > 0)
3644 return TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) - 1;
3646 /* Indicate that we've seen this type node, and the answer is false.
3647 This is what we want to return if we run into recursion via fields. */
3648 TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) = 1;
3650 /* Compute the real value. */
3651 result
= type_contains_placeholder_1 (type
);
3653 /* Store the real value. */
3654 TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) = result
+ 1;
3659 /* Push tree EXP onto vector QUEUE if it is not already present. */
3662 push_without_duplicates (tree exp
, vec
<tree
> *queue
)
3667 FOR_EACH_VEC_ELT (*queue
, i
, iter
)
3668 if (simple_cst_equal (iter
, exp
) == 1)
3672 queue
->safe_push (exp
);
3675 /* Given a tree EXP, find all occurrences of references to fields
3676 in a PLACEHOLDER_EXPR and place them in vector REFS without
3677 duplicates. Also record VAR_DECLs and CONST_DECLs. Note that
3678 we assume here that EXP contains only arithmetic expressions
3679 or CALL_EXPRs with PLACEHOLDER_EXPRs occurring only in their
3683 find_placeholder_in_expr (tree exp
, vec
<tree
> *refs
)
3685 enum tree_code code
= TREE_CODE (exp
);
3689 /* We handle TREE_LIST and COMPONENT_REF separately. */
3690 if (code
== TREE_LIST
)
3692 FIND_PLACEHOLDER_IN_EXPR (TREE_CHAIN (exp
), refs
);
3693 FIND_PLACEHOLDER_IN_EXPR (TREE_VALUE (exp
), refs
);
3695 else if (code
== COMPONENT_REF
)
3697 for (inner
= TREE_OPERAND (exp
, 0);
3698 REFERENCE_CLASS_P (inner
);
3699 inner
= TREE_OPERAND (inner
, 0))
3702 if (TREE_CODE (inner
) == PLACEHOLDER_EXPR
)
3703 push_without_duplicates (exp
, refs
);
3705 FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), refs
);
3708 switch (TREE_CODE_CLASS (code
))
3713 case tcc_declaration
:
3714 /* Variables allocated to static storage can stay. */
3715 if (!TREE_STATIC (exp
))
3716 push_without_duplicates (exp
, refs
);
3719 case tcc_expression
:
3720 /* This is the pattern built in ada/make_aligning_type. */
3721 if (code
== ADDR_EXPR
3722 && TREE_CODE (TREE_OPERAND (exp
, 0)) == PLACEHOLDER_EXPR
)
3724 push_without_duplicates (exp
, refs
);
3730 case tcc_exceptional
:
3733 case tcc_comparison
:
3735 for (i
= 0; i
< TREE_CODE_LENGTH (code
); i
++)
3736 FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, i
), refs
);
3740 for (i
= 1; i
< TREE_OPERAND_LENGTH (exp
); i
++)
3741 FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, i
), refs
);
3749 /* Given a tree EXP, a FIELD_DECL F, and a replacement value R,
3750 return a tree with all occurrences of references to F in a
3751 PLACEHOLDER_EXPR replaced by R. Also handle VAR_DECLs and
3752 CONST_DECLs. Note that we assume here that EXP contains only
3753 arithmetic expressions or CALL_EXPRs with PLACEHOLDER_EXPRs
3754 occurring only in their argument list. */
3757 substitute_in_expr (tree exp
, tree f
, tree r
)
3759 enum tree_code code
= TREE_CODE (exp
);
3760 tree op0
, op1
, op2
, op3
;
3763 /* We handle TREE_LIST and COMPONENT_REF separately. */
3764 if (code
== TREE_LIST
)
3766 op0
= SUBSTITUTE_IN_EXPR (TREE_CHAIN (exp
), f
, r
);
3767 op1
= SUBSTITUTE_IN_EXPR (TREE_VALUE (exp
), f
, r
);
3768 if (op0
== TREE_CHAIN (exp
) && op1
== TREE_VALUE (exp
))
3771 return tree_cons (TREE_PURPOSE (exp
), op1
, op0
);
3773 else if (code
== COMPONENT_REF
)
3777 /* If this expression is getting a value from a PLACEHOLDER_EXPR
3778 and it is the right field, replace it with R. */
3779 for (inner
= TREE_OPERAND (exp
, 0);
3780 REFERENCE_CLASS_P (inner
);
3781 inner
= TREE_OPERAND (inner
, 0))
3785 op1
= TREE_OPERAND (exp
, 1);
3787 if (TREE_CODE (inner
) == PLACEHOLDER_EXPR
&& op1
== f
)
3790 /* If this expression hasn't been completed let, leave it alone. */
3791 if (TREE_CODE (inner
) == PLACEHOLDER_EXPR
&& !TREE_TYPE (inner
))
3794 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3795 if (op0
== TREE_OPERAND (exp
, 0))
3799 = fold_build3 (COMPONENT_REF
, TREE_TYPE (exp
), op0
, op1
, NULL_TREE
);
3802 switch (TREE_CODE_CLASS (code
))
3807 case tcc_declaration
:
3813 case tcc_expression
:
3819 case tcc_exceptional
:
3822 case tcc_comparison
:
3824 switch (TREE_CODE_LENGTH (code
))
3830 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3831 if (op0
== TREE_OPERAND (exp
, 0))
3834 new_tree
= fold_build1 (code
, TREE_TYPE (exp
), op0
);
3838 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3839 op1
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 1), f
, r
);
3841 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1))
3844 new_tree
= fold_build2 (code
, TREE_TYPE (exp
), op0
, op1
);
3848 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3849 op1
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 1), f
, r
);
3850 op2
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 2), f
, r
);
3852 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3853 && op2
== TREE_OPERAND (exp
, 2))
3856 new_tree
= fold_build3 (code
, TREE_TYPE (exp
), op0
, op1
, op2
);
3860 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3861 op1
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 1), f
, r
);
3862 op2
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 2), f
, r
);
3863 op3
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 3), f
, r
);
3865 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3866 && op2
== TREE_OPERAND (exp
, 2)
3867 && op3
== TREE_OPERAND (exp
, 3))
3871 = fold (build4 (code
, TREE_TYPE (exp
), op0
, op1
, op2
, op3
));
3883 new_tree
= NULL_TREE
;
3885 /* If we are trying to replace F with a constant or with another
3886 instance of one of the arguments of the call, inline back
3887 functions which do nothing else than computing a value from
3888 the arguments they are passed. This makes it possible to
3889 fold partially or entirely the replacement expression. */
3890 if (code
== CALL_EXPR
)
3892 bool maybe_inline
= false;
3893 if (CONSTANT_CLASS_P (r
))
3894 maybe_inline
= true;
3896 for (i
= 3; i
< TREE_OPERAND_LENGTH (exp
); i
++)
3897 if (operand_equal_p (TREE_OPERAND (exp
, i
), r
, 0))
3899 maybe_inline
= true;
3904 tree t
= maybe_inline_call_in_expr (exp
);
3906 return SUBSTITUTE_IN_EXPR (t
, f
, r
);
3910 for (i
= 1; i
< TREE_OPERAND_LENGTH (exp
); i
++)
3912 tree op
= TREE_OPERAND (exp
, i
);
3913 tree new_op
= SUBSTITUTE_IN_EXPR (op
, f
, r
);
3917 new_tree
= copy_node (exp
);
3918 TREE_OPERAND (new_tree
, i
) = new_op
;
3924 new_tree
= fold (new_tree
);
3925 if (TREE_CODE (new_tree
) == CALL_EXPR
)
3926 process_call_operands (new_tree
);
3937 TREE_READONLY (new_tree
) |= TREE_READONLY (exp
);
3939 if (code
== INDIRECT_REF
|| code
== ARRAY_REF
|| code
== ARRAY_RANGE_REF
)
3940 TREE_THIS_NOTRAP (new_tree
) |= TREE_THIS_NOTRAP (exp
);
3945 /* Similar, but look for a PLACEHOLDER_EXPR in EXP and find a replacement
3946 for it within OBJ, a tree that is an object or a chain of references. */
3949 substitute_placeholder_in_expr (tree exp
, tree obj
)
3951 enum tree_code code
= TREE_CODE (exp
);
3952 tree op0
, op1
, op2
, op3
;
3955 /* If this is a PLACEHOLDER_EXPR, see if we find a corresponding type
3956 in the chain of OBJ. */
3957 if (code
== PLACEHOLDER_EXPR
)
3959 tree need_type
= TYPE_MAIN_VARIANT (TREE_TYPE (exp
));
3962 for (elt
= obj
; elt
!= 0;
3963 elt
= ((TREE_CODE (elt
) == COMPOUND_EXPR
3964 || TREE_CODE (elt
) == COND_EXPR
)
3965 ? TREE_OPERAND (elt
, 1)
3966 : (REFERENCE_CLASS_P (elt
)
3967 || UNARY_CLASS_P (elt
)
3968 || BINARY_CLASS_P (elt
)
3969 || VL_EXP_CLASS_P (elt
)
3970 || EXPRESSION_CLASS_P (elt
))
3971 ? TREE_OPERAND (elt
, 0) : 0))
3972 if (TYPE_MAIN_VARIANT (TREE_TYPE (elt
)) == need_type
)
3975 for (elt
= obj
; elt
!= 0;
3976 elt
= ((TREE_CODE (elt
) == COMPOUND_EXPR
3977 || TREE_CODE (elt
) == COND_EXPR
)
3978 ? TREE_OPERAND (elt
, 1)
3979 : (REFERENCE_CLASS_P (elt
)
3980 || UNARY_CLASS_P (elt
)
3981 || BINARY_CLASS_P (elt
)
3982 || VL_EXP_CLASS_P (elt
)
3983 || EXPRESSION_CLASS_P (elt
))
3984 ? TREE_OPERAND (elt
, 0) : 0))
3985 if (POINTER_TYPE_P (TREE_TYPE (elt
))
3986 && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (elt
)))
3988 return fold_build1 (INDIRECT_REF
, need_type
, elt
);
3990 /* If we didn't find it, return the original PLACEHOLDER_EXPR. If it
3991 survives until RTL generation, there will be an error. */
3995 /* TREE_LIST is special because we need to look at TREE_VALUE
3996 and TREE_CHAIN, not TREE_OPERANDS. */
3997 else if (code
== TREE_LIST
)
3999 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_CHAIN (exp
), obj
);
4000 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_VALUE (exp
), obj
);
4001 if (op0
== TREE_CHAIN (exp
) && op1
== TREE_VALUE (exp
))
4004 return tree_cons (TREE_PURPOSE (exp
), op1
, op0
);
4007 switch (TREE_CODE_CLASS (code
))
4010 case tcc_declaration
:
4013 case tcc_exceptional
:
4016 case tcc_comparison
:
4017 case tcc_expression
:
4020 switch (TREE_CODE_LENGTH (code
))
4026 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
4027 if (op0
== TREE_OPERAND (exp
, 0))
4030 new_tree
= fold_build1 (code
, TREE_TYPE (exp
), op0
);
4034 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
4035 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 1), obj
);
4037 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1))
4040 new_tree
= fold_build2 (code
, TREE_TYPE (exp
), op0
, op1
);
4044 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
4045 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 1), obj
);
4046 op2
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 2), obj
);
4048 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
4049 && op2
== TREE_OPERAND (exp
, 2))
4052 new_tree
= fold_build3 (code
, TREE_TYPE (exp
), op0
, op1
, op2
);
4056 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
4057 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 1), obj
);
4058 op2
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 2), obj
);
4059 op3
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 3), obj
);
4061 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
4062 && op2
== TREE_OPERAND (exp
, 2)
4063 && op3
== TREE_OPERAND (exp
, 3))
4067 = fold (build4 (code
, TREE_TYPE (exp
), op0
, op1
, op2
, op3
));
4079 new_tree
= NULL_TREE
;
4081 for (i
= 1; i
< TREE_OPERAND_LENGTH (exp
); i
++)
4083 tree op
= TREE_OPERAND (exp
, i
);
4084 tree new_op
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (op
, obj
);
4088 new_tree
= copy_node (exp
);
4089 TREE_OPERAND (new_tree
, i
) = new_op
;
4095 new_tree
= fold (new_tree
);
4096 if (TREE_CODE (new_tree
) == CALL_EXPR
)
4097 process_call_operands (new_tree
);
4108 TREE_READONLY (new_tree
) |= TREE_READONLY (exp
);
4110 if (code
== INDIRECT_REF
|| code
== ARRAY_REF
|| code
== ARRAY_RANGE_REF
)
4111 TREE_THIS_NOTRAP (new_tree
) |= TREE_THIS_NOTRAP (exp
);
4117 /* Subroutine of stabilize_reference; this is called for subtrees of
4118 references. Any expression with side-effects must be put in a SAVE_EXPR
4119 to ensure that it is only evaluated once.
4121 We don't put SAVE_EXPR nodes around everything, because assigning very
4122 simple expressions to temporaries causes us to miss good opportunities
4123 for optimizations. Among other things, the opportunity to fold in the
4124 addition of a constant into an addressing mode often gets lost, e.g.
4125 "y[i+1] += x;". In general, we take the approach that we should not make
4126 an assignment unless we are forced into it - i.e., that any non-side effect
4127 operator should be allowed, and that cse should take care of coalescing
4128 multiple utterances of the same expression should that prove fruitful. */
4131 stabilize_reference_1 (tree e
)
4134 enum tree_code code
= TREE_CODE (e
);
4136 /* We cannot ignore const expressions because it might be a reference
4137 to a const array but whose index contains side-effects. But we can
4138 ignore things that are actual constant or that already have been
4139 handled by this function. */
4141 if (tree_invariant_p (e
))
4144 switch (TREE_CODE_CLASS (code
))
4146 case tcc_exceptional
:
4148 case tcc_declaration
:
4149 case tcc_comparison
:
4151 case tcc_expression
:
4154 /* If the expression has side-effects, then encase it in a SAVE_EXPR
4155 so that it will only be evaluated once. */
4156 /* The reference (r) and comparison (<) classes could be handled as
4157 below, but it is generally faster to only evaluate them once. */
4158 if (TREE_SIDE_EFFECTS (e
))
4159 return save_expr (e
);
4163 /* Constants need no processing. In fact, we should never reach
4168 /* Division is slow and tends to be compiled with jumps,
4169 especially the division by powers of 2 that is often
4170 found inside of an array reference. So do it just once. */
4171 if (code
== TRUNC_DIV_EXPR
|| code
== TRUNC_MOD_EXPR
4172 || code
== FLOOR_DIV_EXPR
|| code
== FLOOR_MOD_EXPR
4173 || code
== CEIL_DIV_EXPR
|| code
== CEIL_MOD_EXPR
4174 || code
== ROUND_DIV_EXPR
|| code
== ROUND_MOD_EXPR
)
4175 return save_expr (e
);
4176 /* Recursively stabilize each operand. */
4177 result
= build_nt (code
, stabilize_reference_1 (TREE_OPERAND (e
, 0)),
4178 stabilize_reference_1 (TREE_OPERAND (e
, 1)));
4182 /* Recursively stabilize each operand. */
4183 result
= build_nt (code
, stabilize_reference_1 (TREE_OPERAND (e
, 0)));
4190 TREE_TYPE (result
) = TREE_TYPE (e
);
4191 TREE_READONLY (result
) = TREE_READONLY (e
);
4192 TREE_SIDE_EFFECTS (result
) = TREE_SIDE_EFFECTS (e
);
4193 TREE_THIS_VOLATILE (result
) = TREE_THIS_VOLATILE (e
);
4198 /* Stabilize a reference so that we can use it any number of times
4199 without causing its operands to be evaluated more than once.
4200 Returns the stabilized reference. This works by means of save_expr,
4201 so see the caveats in the comments about save_expr.
4203 Also allows conversion expressions whose operands are references.
4204 Any other kind of expression is returned unchanged. */
4207 stabilize_reference (tree ref
)
4210 enum tree_code code
= TREE_CODE (ref
);
4217 /* No action is needed in this case. */
4222 case FIX_TRUNC_EXPR
:
4223 result
= build_nt (code
, stabilize_reference (TREE_OPERAND (ref
, 0)));
4227 result
= build_nt (INDIRECT_REF
,
4228 stabilize_reference_1 (TREE_OPERAND (ref
, 0)));
4232 result
= build_nt (COMPONENT_REF
,
4233 stabilize_reference (TREE_OPERAND (ref
, 0)),
4234 TREE_OPERAND (ref
, 1), NULL_TREE
);
4238 result
= build_nt (BIT_FIELD_REF
,
4239 stabilize_reference (TREE_OPERAND (ref
, 0)),
4240 TREE_OPERAND (ref
, 1), TREE_OPERAND (ref
, 2));
4241 REF_REVERSE_STORAGE_ORDER (result
) = REF_REVERSE_STORAGE_ORDER (ref
);
4245 result
= build_nt (ARRAY_REF
,
4246 stabilize_reference (TREE_OPERAND (ref
, 0)),
4247 stabilize_reference_1 (TREE_OPERAND (ref
, 1)),
4248 TREE_OPERAND (ref
, 2), TREE_OPERAND (ref
, 3));
4251 case ARRAY_RANGE_REF
:
4252 result
= build_nt (ARRAY_RANGE_REF
,
4253 stabilize_reference (TREE_OPERAND (ref
, 0)),
4254 stabilize_reference_1 (TREE_OPERAND (ref
, 1)),
4255 TREE_OPERAND (ref
, 2), TREE_OPERAND (ref
, 3));
4259 /* We cannot wrap the first expression in a SAVE_EXPR, as then
4260 it wouldn't be ignored. This matters when dealing with
4262 return stabilize_reference_1 (ref
);
4264 /* If arg isn't a kind of lvalue we recognize, make no change.
4265 Caller should recognize the error for an invalid lvalue. */
4270 return error_mark_node
;
4273 TREE_TYPE (result
) = TREE_TYPE (ref
);
4274 TREE_READONLY (result
) = TREE_READONLY (ref
);
4275 TREE_SIDE_EFFECTS (result
) = TREE_SIDE_EFFECTS (ref
);
4276 TREE_THIS_VOLATILE (result
) = TREE_THIS_VOLATILE (ref
);
4281 /* Low-level constructors for expressions. */
4283 /* A helper function for build1 and constant folders. Set TREE_CONSTANT,
4284 and TREE_SIDE_EFFECTS for an ADDR_EXPR. */
4287 recompute_tree_invariant_for_addr_expr (tree t
)
4290 bool tc
= true, se
= false;
4292 gcc_assert (TREE_CODE (t
) == ADDR_EXPR
);
4294 /* We started out assuming this address is both invariant and constant, but
4295 does not have side effects. Now go down any handled components and see if
4296 any of them involve offsets that are either non-constant or non-invariant.
4297 Also check for side-effects.
4299 ??? Note that this code makes no attempt to deal with the case where
4300 taking the address of something causes a copy due to misalignment. */
4302 #define UPDATE_FLAGS(NODE) \
4303 do { tree _node = (NODE); \
4304 if (_node && !TREE_CONSTANT (_node)) tc = false; \
4305 if (_node && TREE_SIDE_EFFECTS (_node)) se = true; } while (0)
4307 for (node
= TREE_OPERAND (t
, 0); handled_component_p (node
);
4308 node
= TREE_OPERAND (node
, 0))
4310 /* If the first operand doesn't have an ARRAY_TYPE, this is a bogus
4311 array reference (probably made temporarily by the G++ front end),
4312 so ignore all the operands. */
4313 if ((TREE_CODE (node
) == ARRAY_REF
4314 || TREE_CODE (node
) == ARRAY_RANGE_REF
)
4315 && TREE_CODE (TREE_TYPE (TREE_OPERAND (node
, 0))) == ARRAY_TYPE
)
4317 UPDATE_FLAGS (TREE_OPERAND (node
, 1));
4318 if (TREE_OPERAND (node
, 2))
4319 UPDATE_FLAGS (TREE_OPERAND (node
, 2));
4320 if (TREE_OPERAND (node
, 3))
4321 UPDATE_FLAGS (TREE_OPERAND (node
, 3));
4323 /* Likewise, just because this is a COMPONENT_REF doesn't mean we have a
4324 FIELD_DECL, apparently. The G++ front end can put something else
4325 there, at least temporarily. */
4326 else if (TREE_CODE (node
) == COMPONENT_REF
4327 && TREE_CODE (TREE_OPERAND (node
, 1)) == FIELD_DECL
)
4329 if (TREE_OPERAND (node
, 2))
4330 UPDATE_FLAGS (TREE_OPERAND (node
, 2));
4334 node
= lang_hooks
.expr_to_decl (node
, &tc
, &se
);
4336 /* Now see what's inside. If it's an INDIRECT_REF, copy our properties from
4337 the address, since &(*a)->b is a form of addition. If it's a constant, the
4338 address is constant too. If it's a decl, its address is constant if the
4339 decl is static. Everything else is not constant and, furthermore,
4340 taking the address of a volatile variable is not volatile. */
4341 if (TREE_CODE (node
) == INDIRECT_REF
4342 || TREE_CODE (node
) == MEM_REF
)
4343 UPDATE_FLAGS (TREE_OPERAND (node
, 0));
4344 else if (CONSTANT_CLASS_P (node
))
4346 else if (DECL_P (node
))
4347 tc
&= (staticp (node
) != NULL_TREE
);
4351 se
|= TREE_SIDE_EFFECTS (node
);
4355 TREE_CONSTANT (t
) = tc
;
4356 TREE_SIDE_EFFECTS (t
) = se
;
4360 /* Build an expression of code CODE, data type TYPE, and operands as
4361 specified. Expressions and reference nodes can be created this way.
4362 Constants, decls, types and misc nodes cannot be.
4364 We define 5 non-variadic functions, from 0 to 4 arguments. This is
4365 enough for all extant tree codes. */
4368 build0_stat (enum tree_code code
, tree tt MEM_STAT_DECL
)
4372 gcc_assert (TREE_CODE_LENGTH (code
) == 0);
4374 t
= make_node_stat (code PASS_MEM_STAT
);
4381 build1_stat (enum tree_code code
, tree type
, tree node MEM_STAT_DECL
)
4383 int length
= sizeof (struct tree_exp
);
4386 record_node_allocation_statistics (code
, length
);
4388 gcc_assert (TREE_CODE_LENGTH (code
) == 1);
4390 t
= ggc_alloc_tree_node_stat (length PASS_MEM_STAT
);
4392 memset (t
, 0, sizeof (struct tree_common
));
4394 TREE_SET_CODE (t
, code
);
4396 TREE_TYPE (t
) = type
;
4397 SET_EXPR_LOCATION (t
, UNKNOWN_LOCATION
);
4398 TREE_OPERAND (t
, 0) = node
;
4399 if (node
&& !TYPE_P (node
))
4401 TREE_SIDE_EFFECTS (t
) = TREE_SIDE_EFFECTS (node
);
4402 TREE_READONLY (t
) = TREE_READONLY (node
);
4405 if (TREE_CODE_CLASS (code
) == tcc_statement
)
4406 TREE_SIDE_EFFECTS (t
) = 1;
4410 /* All of these have side-effects, no matter what their
4412 TREE_SIDE_EFFECTS (t
) = 1;
4413 TREE_READONLY (t
) = 0;
4417 /* Whether a dereference is readonly has nothing to do with whether
4418 its operand is readonly. */
4419 TREE_READONLY (t
) = 0;
4424 recompute_tree_invariant_for_addr_expr (t
);
4428 if ((TREE_CODE_CLASS (code
) == tcc_unary
|| code
== VIEW_CONVERT_EXPR
)
4429 && node
&& !TYPE_P (node
)
4430 && TREE_CONSTANT (node
))
4431 TREE_CONSTANT (t
) = 1;
4432 if (TREE_CODE_CLASS (code
) == tcc_reference
4433 && node
&& TREE_THIS_VOLATILE (node
))
4434 TREE_THIS_VOLATILE (t
) = 1;
4441 #define PROCESS_ARG(N) \
4443 TREE_OPERAND (t, N) = arg##N; \
4444 if (arg##N &&!TYPE_P (arg##N)) \
4446 if (TREE_SIDE_EFFECTS (arg##N)) \
4448 if (!TREE_READONLY (arg##N) \
4449 && !CONSTANT_CLASS_P (arg##N)) \
4450 (void) (read_only = 0); \
4451 if (!TREE_CONSTANT (arg##N)) \
4452 (void) (constant = 0); \
4457 build2_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1 MEM_STAT_DECL
)
4459 bool constant
, read_only
, side_effects
;
4462 gcc_assert (TREE_CODE_LENGTH (code
) == 2);
4464 if ((code
== MINUS_EXPR
|| code
== PLUS_EXPR
|| code
== MULT_EXPR
)
4465 && arg0
&& arg1
&& tt
&& POINTER_TYPE_P (tt
)
4466 /* When sizetype precision doesn't match that of pointers
4467 we need to be able to build explicit extensions or truncations
4468 of the offset argument. */
4469 && TYPE_PRECISION (sizetype
) == TYPE_PRECISION (tt
))
4470 gcc_assert (TREE_CODE (arg0
) == INTEGER_CST
4471 && TREE_CODE (arg1
) == INTEGER_CST
);
4473 if (code
== POINTER_PLUS_EXPR
&& arg0
&& arg1
&& tt
)
4474 gcc_assert (POINTER_TYPE_P (tt
) && POINTER_TYPE_P (TREE_TYPE (arg0
))
4475 && ptrofftype_p (TREE_TYPE (arg1
)));
4477 t
= make_node_stat (code PASS_MEM_STAT
);
4480 /* Below, we automatically set TREE_SIDE_EFFECTS and TREE_READONLY for the
4481 result based on those same flags for the arguments. But if the
4482 arguments aren't really even `tree' expressions, we shouldn't be trying
4485 /* Expressions without side effects may be constant if their
4486 arguments are as well. */
4487 constant
= (TREE_CODE_CLASS (code
) == tcc_comparison
4488 || TREE_CODE_CLASS (code
) == tcc_binary
);
4490 side_effects
= TREE_SIDE_EFFECTS (t
);
4495 TREE_SIDE_EFFECTS (t
) = side_effects
;
4496 if (code
== MEM_REF
)
4498 if (arg0
&& TREE_CODE (arg0
) == ADDR_EXPR
)
4500 tree o
= TREE_OPERAND (arg0
, 0);
4501 TREE_READONLY (t
) = TREE_READONLY (o
);
4502 TREE_THIS_VOLATILE (t
) = TREE_THIS_VOLATILE (o
);
4507 TREE_READONLY (t
) = read_only
;
4508 TREE_CONSTANT (t
) = constant
;
4509 TREE_THIS_VOLATILE (t
)
4510 = (TREE_CODE_CLASS (code
) == tcc_reference
4511 && arg0
&& TREE_THIS_VOLATILE (arg0
));
4519 build3_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
4520 tree arg2 MEM_STAT_DECL
)
4522 bool constant
, read_only
, side_effects
;
4525 gcc_assert (TREE_CODE_LENGTH (code
) == 3);
4526 gcc_assert (TREE_CODE_CLASS (code
) != tcc_vl_exp
);
4528 t
= make_node_stat (code PASS_MEM_STAT
);
4533 /* As a special exception, if COND_EXPR has NULL branches, we
4534 assume that it is a gimple statement and always consider
4535 it to have side effects. */
4536 if (code
== COND_EXPR
4537 && tt
== void_type_node
4538 && arg1
== NULL_TREE
4539 && arg2
== NULL_TREE
)
4540 side_effects
= true;
4542 side_effects
= TREE_SIDE_EFFECTS (t
);
4548 if (code
== COND_EXPR
)
4549 TREE_READONLY (t
) = read_only
;
4551 TREE_SIDE_EFFECTS (t
) = side_effects
;
4552 TREE_THIS_VOLATILE (t
)
4553 = (TREE_CODE_CLASS (code
) == tcc_reference
4554 && arg0
&& TREE_THIS_VOLATILE (arg0
));
4560 build4_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
4561 tree arg2
, tree arg3 MEM_STAT_DECL
)
4563 bool constant
, read_only
, side_effects
;
4566 gcc_assert (TREE_CODE_LENGTH (code
) == 4);
4568 t
= make_node_stat (code PASS_MEM_STAT
);
4571 side_effects
= TREE_SIDE_EFFECTS (t
);
4578 TREE_SIDE_EFFECTS (t
) = side_effects
;
4579 TREE_THIS_VOLATILE (t
)
4580 = (TREE_CODE_CLASS (code
) == tcc_reference
4581 && arg0
&& TREE_THIS_VOLATILE (arg0
));
4587 build5_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
4588 tree arg2
, tree arg3
, tree arg4 MEM_STAT_DECL
)
4590 bool constant
, read_only
, side_effects
;
4593 gcc_assert (TREE_CODE_LENGTH (code
) == 5);
4595 t
= make_node_stat (code PASS_MEM_STAT
);
4598 side_effects
= TREE_SIDE_EFFECTS (t
);
4606 TREE_SIDE_EFFECTS (t
) = side_effects
;
4607 if (code
== TARGET_MEM_REF
)
4609 if (arg0
&& TREE_CODE (arg0
) == ADDR_EXPR
)
4611 tree o
= TREE_OPERAND (arg0
, 0);
4612 TREE_READONLY (t
) = TREE_READONLY (o
);
4613 TREE_THIS_VOLATILE (t
) = TREE_THIS_VOLATILE (o
);
4617 TREE_THIS_VOLATILE (t
)
4618 = (TREE_CODE_CLASS (code
) == tcc_reference
4619 && arg0
&& TREE_THIS_VOLATILE (arg0
));
4624 /* Build a simple MEM_REF tree with the sematics of a plain INDIRECT_REF
4625 on the pointer PTR. */
4628 build_simple_mem_ref_loc (location_t loc
, tree ptr
)
4630 HOST_WIDE_INT offset
= 0;
4631 tree ptype
= TREE_TYPE (ptr
);
4633 /* For convenience allow addresses that collapse to a simple base
4635 if (TREE_CODE (ptr
) == ADDR_EXPR
4636 && (handled_component_p (TREE_OPERAND (ptr
, 0))
4637 || TREE_CODE (TREE_OPERAND (ptr
, 0)) == MEM_REF
))
4639 ptr
= get_addr_base_and_unit_offset (TREE_OPERAND (ptr
, 0), &offset
);
4641 ptr
= build_fold_addr_expr (ptr
);
4642 gcc_assert (is_gimple_reg (ptr
) || is_gimple_min_invariant (ptr
));
4644 tem
= build2 (MEM_REF
, TREE_TYPE (ptype
),
4645 ptr
, build_int_cst (ptype
, offset
));
4646 SET_EXPR_LOCATION (tem
, loc
);
4650 /* Return the constant offset of a MEM_REF or TARGET_MEM_REF tree T. */
4653 mem_ref_offset (const_tree t
)
4655 return offset_int::from (TREE_OPERAND (t
, 1), SIGNED
);
4658 /* Return an invariant ADDR_EXPR of type TYPE taking the address of BASE
4659 offsetted by OFFSET units. */
4662 build_invariant_address (tree type
, tree base
, HOST_WIDE_INT offset
)
4664 tree ref
= fold_build2 (MEM_REF
, TREE_TYPE (type
),
4665 build_fold_addr_expr (base
),
4666 build_int_cst (ptr_type_node
, offset
));
4667 tree addr
= build1 (ADDR_EXPR
, type
, ref
);
4668 recompute_tree_invariant_for_addr_expr (addr
);
4672 /* Similar except don't specify the TREE_TYPE
4673 and leave the TREE_SIDE_EFFECTS as 0.
4674 It is permissible for arguments to be null,
4675 or even garbage if their values do not matter. */
4678 build_nt (enum tree_code code
, ...)
4685 gcc_assert (TREE_CODE_CLASS (code
) != tcc_vl_exp
);
4689 t
= make_node (code
);
4690 length
= TREE_CODE_LENGTH (code
);
4692 for (i
= 0; i
< length
; i
++)
4693 TREE_OPERAND (t
, i
) = va_arg (p
, tree
);
4699 /* Similar to build_nt, but for creating a CALL_EXPR object with a
4703 build_nt_call_vec (tree fn
, vec
<tree
, va_gc
> *args
)
4708 ret
= build_vl_exp (CALL_EXPR
, vec_safe_length (args
) + 3);
4709 CALL_EXPR_FN (ret
) = fn
;
4710 CALL_EXPR_STATIC_CHAIN (ret
) = NULL_TREE
;
4711 FOR_EACH_VEC_SAFE_ELT (args
, ix
, t
)
4712 CALL_EXPR_ARG (ret
, ix
) = t
;
4716 /* Create a DECL_... node of code CODE, name NAME and data type TYPE.
4717 We do NOT enter this node in any sort of symbol table.
4719 LOC is the location of the decl.
4721 layout_decl is used to set up the decl's storage layout.
4722 Other slots are initialized to 0 or null pointers. */
4725 build_decl_stat (location_t loc
, enum tree_code code
, tree name
,
4726 tree type MEM_STAT_DECL
)
4730 t
= make_node_stat (code PASS_MEM_STAT
);
4731 DECL_SOURCE_LOCATION (t
) = loc
;
4733 /* if (type == error_mark_node)
4734 type = integer_type_node; */
4735 /* That is not done, deliberately, so that having error_mark_node
4736 as the type can suppress useless errors in the use of this variable. */
4738 DECL_NAME (t
) = name
;
4739 TREE_TYPE (t
) = type
;
4741 if (code
== VAR_DECL
|| code
== PARM_DECL
|| code
== RESULT_DECL
)
4747 /* Builds and returns function declaration with NAME and TYPE. */
4750 build_fn_decl (const char *name
, tree type
)
4752 tree id
= get_identifier (name
);
4753 tree decl
= build_decl (input_location
, FUNCTION_DECL
, id
, type
);
4755 DECL_EXTERNAL (decl
) = 1;
4756 TREE_PUBLIC (decl
) = 1;
4757 DECL_ARTIFICIAL (decl
) = 1;
4758 TREE_NOTHROW (decl
) = 1;
4763 vec
<tree
, va_gc
> *all_translation_units
;
4765 /* Builds a new translation-unit decl with name NAME, queues it in the
4766 global list of translation-unit decls and returns it. */
4769 build_translation_unit_decl (tree name
)
4771 tree tu
= build_decl (UNKNOWN_LOCATION
, TRANSLATION_UNIT_DECL
,
4773 TRANSLATION_UNIT_LANGUAGE (tu
) = lang_hooks
.name
;
4774 vec_safe_push (all_translation_units
, tu
);
4779 /* BLOCK nodes are used to represent the structure of binding contours
4780 and declarations, once those contours have been exited and their contents
4781 compiled. This information is used for outputting debugging info. */
4784 build_block (tree vars
, tree subblocks
, tree supercontext
, tree chain
)
4786 tree block
= make_node (BLOCK
);
4788 BLOCK_VARS (block
) = vars
;
4789 BLOCK_SUBBLOCKS (block
) = subblocks
;
4790 BLOCK_SUPERCONTEXT (block
) = supercontext
;
4791 BLOCK_CHAIN (block
) = chain
;
4796 /* Like SET_EXPR_LOCATION, but make sure the tree can have a location.
4798 LOC is the location to use in tree T. */
4801 protected_set_expr_location (tree t
, location_t loc
)
4803 if (CAN_HAVE_LOCATION_P (t
))
4804 SET_EXPR_LOCATION (t
, loc
);
4807 /* Return a declaration like DDECL except that its DECL_ATTRIBUTES
4811 build_decl_attribute_variant (tree ddecl
, tree attribute
)
4813 DECL_ATTRIBUTES (ddecl
) = attribute
;
4817 /* Return a type like TTYPE except that its TYPE_ATTRIBUTE
4818 is ATTRIBUTE and its qualifiers are QUALS.
4820 Record such modified types already made so we don't make duplicates. */
4823 build_type_attribute_qual_variant (tree ttype
, tree attribute
, int quals
)
4825 if (! attribute_list_equal (TYPE_ATTRIBUTES (ttype
), attribute
))
4829 /* Building a distinct copy of a tagged type is inappropriate; it
4830 causes breakage in code that expects there to be a one-to-one
4831 relationship between a struct and its fields.
4832 build_duplicate_type is another solution (as used in
4833 handle_transparent_union_attribute), but that doesn't play well
4834 with the stronger C++ type identity model. */
4835 if (TREE_CODE (ttype
) == RECORD_TYPE
4836 || TREE_CODE (ttype
) == UNION_TYPE
4837 || TREE_CODE (ttype
) == QUAL_UNION_TYPE
4838 || TREE_CODE (ttype
) == ENUMERAL_TYPE
)
4840 warning (OPT_Wattributes
,
4841 "ignoring attributes applied to %qT after definition",
4842 TYPE_MAIN_VARIANT (ttype
));
4843 return build_qualified_type (ttype
, quals
);
4846 ttype
= build_qualified_type (ttype
, TYPE_UNQUALIFIED
);
4847 ntype
= build_distinct_type_copy (ttype
);
4849 TYPE_ATTRIBUTES (ntype
) = attribute
;
4851 hashval_t hash
= type_hash_canon_hash (ntype
);
4852 ntype
= type_hash_canon (hash
, ntype
);
4854 /* If the target-dependent attributes make NTYPE different from
4855 its canonical type, we will need to use structural equality
4856 checks for this type. */
4857 if (TYPE_STRUCTURAL_EQUALITY_P (ttype
)
4858 || !comp_type_attributes (ntype
, ttype
))
4859 SET_TYPE_STRUCTURAL_EQUALITY (ntype
);
4860 else if (TYPE_CANONICAL (ntype
) == ntype
)
4861 TYPE_CANONICAL (ntype
) = TYPE_CANONICAL (ttype
);
4863 ttype
= build_qualified_type (ntype
, quals
);
4865 else if (TYPE_QUALS (ttype
) != quals
)
4866 ttype
= build_qualified_type (ttype
, quals
);
4871 /* Check if "omp declare simd" attribute arguments, CLAUSES1 and CLAUSES2, are
4875 omp_declare_simd_clauses_equal (tree clauses1
, tree clauses2
)
4878 for (cl1
= clauses1
, cl2
= clauses2
;
4880 cl1
= OMP_CLAUSE_CHAIN (cl1
), cl2
= OMP_CLAUSE_CHAIN (cl2
))
4882 if (OMP_CLAUSE_CODE (cl1
) != OMP_CLAUSE_CODE (cl2
))
4884 if (OMP_CLAUSE_CODE (cl1
) != OMP_CLAUSE_SIMDLEN
)
4886 if (simple_cst_equal (OMP_CLAUSE_DECL (cl1
),
4887 OMP_CLAUSE_DECL (cl2
)) != 1)
4890 switch (OMP_CLAUSE_CODE (cl1
))
4892 case OMP_CLAUSE_ALIGNED
:
4893 if (simple_cst_equal (OMP_CLAUSE_ALIGNED_ALIGNMENT (cl1
),
4894 OMP_CLAUSE_ALIGNED_ALIGNMENT (cl2
)) != 1)
4897 case OMP_CLAUSE_LINEAR
:
4898 if (simple_cst_equal (OMP_CLAUSE_LINEAR_STEP (cl1
),
4899 OMP_CLAUSE_LINEAR_STEP (cl2
)) != 1)
4902 case OMP_CLAUSE_SIMDLEN
:
4903 if (simple_cst_equal (OMP_CLAUSE_SIMDLEN_EXPR (cl1
),
4904 OMP_CLAUSE_SIMDLEN_EXPR (cl2
)) != 1)
4913 /* Compare two constructor-element-type constants. Return 1 if the lists
4914 are known to be equal; otherwise return 0. */
4917 simple_cst_list_equal (const_tree l1
, const_tree l2
)
4919 while (l1
!= NULL_TREE
&& l2
!= NULL_TREE
)
4921 if (simple_cst_equal (TREE_VALUE (l1
), TREE_VALUE (l2
)) != 1)
4924 l1
= TREE_CHAIN (l1
);
4925 l2
= TREE_CHAIN (l2
);
4931 /* Compare two identifier nodes representing attributes. Either one may
4932 be in wrapped __ATTR__ form. Return true if they are the same, false
4936 cmp_attrib_identifiers (const_tree attr1
, const_tree attr2
)
4938 /* Make sure we're dealing with IDENTIFIER_NODEs. */
4939 gcc_checking_assert (TREE_CODE (attr1
) == IDENTIFIER_NODE
4940 && TREE_CODE (attr2
) == IDENTIFIER_NODE
);
4942 /* Identifiers can be compared directly for equality. */
4946 /* If they are not equal, they may still be one in the form
4947 'text' while the other one is in the form '__text__'. TODO:
4948 If we were storing attributes in normalized 'text' form, then
4949 this could all go away and we could take full advantage of
4950 the fact that we're comparing identifiers. :-) */
4951 const size_t attr1_len
= IDENTIFIER_LENGTH (attr1
);
4952 const size_t attr2_len
= IDENTIFIER_LENGTH (attr2
);
4954 if (attr2_len
== attr1_len
+ 4)
4956 const char *p
= IDENTIFIER_POINTER (attr2
);
4957 const char *q
= IDENTIFIER_POINTER (attr1
);
4958 if (p
[0] == '_' && p
[1] == '_'
4959 && p
[attr2_len
- 2] == '_' && p
[attr2_len
- 1] == '_'
4960 && strncmp (q
, p
+ 2, attr1_len
) == 0)
4963 else if (attr2_len
+ 4 == attr1_len
)
4965 const char *p
= IDENTIFIER_POINTER (attr2
);
4966 const char *q
= IDENTIFIER_POINTER (attr1
);
4967 if (q
[0] == '_' && q
[1] == '_'
4968 && q
[attr1_len
- 2] == '_' && q
[attr1_len
- 1] == '_'
4969 && strncmp (q
+ 2, p
, attr2_len
) == 0)
4976 /* Compare two attributes for their value identity. Return true if the
4977 attribute values are known to be equal; otherwise return false. */
4980 attribute_value_equal (const_tree attr1
, const_tree attr2
)
4982 if (TREE_VALUE (attr1
) == TREE_VALUE (attr2
))
4985 if (TREE_VALUE (attr1
) != NULL_TREE
4986 && TREE_CODE (TREE_VALUE (attr1
)) == TREE_LIST
4987 && TREE_VALUE (attr2
) != NULL_TREE
4988 && TREE_CODE (TREE_VALUE (attr2
)) == TREE_LIST
)
4990 /* Handle attribute format. */
4991 if (is_attribute_p ("format", get_attribute_name (attr1
)))
4993 attr1
= TREE_VALUE (attr1
);
4994 attr2
= TREE_VALUE (attr2
);
4995 /* Compare the archetypes (printf/scanf/strftime/...). */
4996 if (!cmp_attrib_identifiers (TREE_VALUE (attr1
),
4997 TREE_VALUE (attr2
)))
4999 /* Archetypes are the same. Compare the rest. */
5000 return (simple_cst_list_equal (TREE_CHAIN (attr1
),
5001 TREE_CHAIN (attr2
)) == 1);
5003 return (simple_cst_list_equal (TREE_VALUE (attr1
),
5004 TREE_VALUE (attr2
)) == 1);
5007 if ((flag_openmp
|| flag_openmp_simd
)
5008 && TREE_VALUE (attr1
) && TREE_VALUE (attr2
)
5009 && TREE_CODE (TREE_VALUE (attr1
)) == OMP_CLAUSE
5010 && TREE_CODE (TREE_VALUE (attr2
)) == OMP_CLAUSE
)
5011 return omp_declare_simd_clauses_equal (TREE_VALUE (attr1
),
5012 TREE_VALUE (attr2
));
5014 return (simple_cst_equal (TREE_VALUE (attr1
), TREE_VALUE (attr2
)) == 1);
5017 /* Return 0 if the attributes for two types are incompatible, 1 if they
5018 are compatible, and 2 if they are nearly compatible (which causes a
5019 warning to be generated). */
5021 comp_type_attributes (const_tree type1
, const_tree type2
)
5023 const_tree a1
= TYPE_ATTRIBUTES (type1
);
5024 const_tree a2
= TYPE_ATTRIBUTES (type2
);
5029 for (a
= a1
; a
!= NULL_TREE
; a
= TREE_CHAIN (a
))
5031 const struct attribute_spec
*as
;
5034 as
= lookup_attribute_spec (get_attribute_name (a
));
5035 if (!as
|| as
->affects_type_identity
== false)
5038 attr
= lookup_attribute (as
->name
, CONST_CAST_TREE (a2
));
5039 if (!attr
|| !attribute_value_equal (a
, attr
))
5044 for (a
= a2
; a
!= NULL_TREE
; a
= TREE_CHAIN (a
))
5046 const struct attribute_spec
*as
;
5048 as
= lookup_attribute_spec (get_attribute_name (a
));
5049 if (!as
|| as
->affects_type_identity
== false)
5052 if (!lookup_attribute (as
->name
, CONST_CAST_TREE (a1
)))
5054 /* We don't need to compare trees again, as we did this
5055 already in first loop. */
5057 /* All types - affecting identity - are equal, so
5058 there is no need to call target hook for comparison. */
5062 if (lookup_attribute ("transaction_safe", CONST_CAST_TREE (a
)))
5064 /* As some type combinations - like default calling-convention - might
5065 be compatible, we have to call the target hook to get the final result. */
5066 return targetm
.comp_type_attributes (type1
, type2
);
5069 /* Return a type like TTYPE except that its TYPE_ATTRIBUTE
5072 Record such modified types already made so we don't make duplicates. */
5075 build_type_attribute_variant (tree ttype
, tree attribute
)
5077 return build_type_attribute_qual_variant (ttype
, attribute
,
5078 TYPE_QUALS (ttype
));
5082 /* Reset the expression *EXPR_P, a size or position.
5084 ??? We could reset all non-constant sizes or positions. But it's cheap
5085 enough to not do so and refrain from adding workarounds to dwarf2out.c.
5087 We need to reset self-referential sizes or positions because they cannot
5088 be gimplified and thus can contain a CALL_EXPR after the gimplification
5089 is finished, which will run afoul of LTO streaming. And they need to be
5090 reset to something essentially dummy but not constant, so as to preserve
5091 the properties of the object they are attached to. */
5094 free_lang_data_in_one_sizepos (tree
*expr_p
)
5096 tree expr
= *expr_p
;
5097 if (CONTAINS_PLACEHOLDER_P (expr
))
5098 *expr_p
= build0 (PLACEHOLDER_EXPR
, TREE_TYPE (expr
));
5102 /* Reset all the fields in a binfo node BINFO. We only keep
5103 BINFO_VTABLE, which is used by gimple_fold_obj_type_ref. */
5106 free_lang_data_in_binfo (tree binfo
)
5111 gcc_assert (TREE_CODE (binfo
) == TREE_BINFO
);
5113 BINFO_VIRTUALS (binfo
) = NULL_TREE
;
5114 BINFO_BASE_ACCESSES (binfo
) = NULL
;
5115 BINFO_INHERITANCE_CHAIN (binfo
) = NULL_TREE
;
5116 BINFO_SUBVTT_INDEX (binfo
) = NULL_TREE
;
5118 FOR_EACH_VEC_ELT (*BINFO_BASE_BINFOS (binfo
), i
, t
)
5119 free_lang_data_in_binfo (t
);
5123 /* Reset all language specific information still present in TYPE. */
5126 free_lang_data_in_type (tree type
)
5128 gcc_assert (TYPE_P (type
));
5130 /* Give the FE a chance to remove its own data first. */
5131 lang_hooks
.free_lang_data (type
);
5133 TREE_LANG_FLAG_0 (type
) = 0;
5134 TREE_LANG_FLAG_1 (type
) = 0;
5135 TREE_LANG_FLAG_2 (type
) = 0;
5136 TREE_LANG_FLAG_3 (type
) = 0;
5137 TREE_LANG_FLAG_4 (type
) = 0;
5138 TREE_LANG_FLAG_5 (type
) = 0;
5139 TREE_LANG_FLAG_6 (type
) = 0;
5141 if (TREE_CODE (type
) == FUNCTION_TYPE
)
5143 /* Remove the const and volatile qualifiers from arguments. The
5144 C++ front end removes them, but the C front end does not,
5145 leading to false ODR violation errors when merging two
5146 instances of the same function signature compiled by
5147 different front ends. */
5150 for (p
= TYPE_ARG_TYPES (type
); p
; p
= TREE_CHAIN (p
))
5152 tree arg_type
= TREE_VALUE (p
);
5154 if (TYPE_READONLY (arg_type
) || TYPE_VOLATILE (arg_type
))
5156 int quals
= TYPE_QUALS (arg_type
)
5158 & ~TYPE_QUAL_VOLATILE
;
5159 TREE_VALUE (p
) = build_qualified_type (arg_type
, quals
);
5160 free_lang_data_in_type (TREE_VALUE (p
));
5162 /* C++ FE uses TREE_PURPOSE to store initial values. */
5163 TREE_PURPOSE (p
) = NULL
;
5165 /* Java uses TYPE_MINVAL for TYPE_ARGUMENT_SIGNATURE. */
5166 TYPE_MINVAL (type
) = NULL
;
5168 if (TREE_CODE (type
) == METHOD_TYPE
)
5172 for (p
= TYPE_ARG_TYPES (type
); p
; p
= TREE_CHAIN (p
))
5174 /* C++ FE uses TREE_PURPOSE to store initial values. */
5175 TREE_PURPOSE (p
) = NULL
;
5177 /* Java uses TYPE_MINVAL for TYPE_ARGUMENT_SIGNATURE. */
5178 TYPE_MINVAL (type
) = NULL
;
5181 /* Remove members that are not actually FIELD_DECLs from the field
5182 list of an aggregate. These occur in C++. */
5183 if (RECORD_OR_UNION_TYPE_P (type
))
5187 /* Note that TYPE_FIELDS can be shared across distinct
5188 TREE_TYPEs. Therefore, if the first field of TYPE_FIELDS is
5189 to be removed, we cannot set its TREE_CHAIN to NULL.
5190 Otherwise, we would not be able to find all the other fields
5191 in the other instances of this TREE_TYPE.
5193 This was causing an ICE in testsuite/g++.dg/lto/20080915.C. */
5195 member
= TYPE_FIELDS (type
);
5198 if (TREE_CODE (member
) == FIELD_DECL
5199 || (TREE_CODE (member
) == TYPE_DECL
5200 && !DECL_IGNORED_P (member
)
5201 && debug_info_level
> DINFO_LEVEL_TERSE
5202 && !is_redundant_typedef (member
)))
5205 TREE_CHAIN (prev
) = member
;
5207 TYPE_FIELDS (type
) = member
;
5211 member
= TREE_CHAIN (member
);
5215 TREE_CHAIN (prev
) = NULL_TREE
;
5217 TYPE_FIELDS (type
) = NULL_TREE
;
5219 /* FIXME: C FE uses TYPE_VFIELD to record C_TYPE_INCOMPLETE_VARS
5220 and danagle the pointer from time to time. */
5221 if (TYPE_VFIELD (type
) && TREE_CODE (TYPE_VFIELD (type
)) != FIELD_DECL
)
5222 TYPE_VFIELD (type
) = NULL_TREE
;
5224 /* Remove TYPE_METHODS list. While it would be nice to keep it
5225 to enable ODR warnings about different method lists, doing so
5226 seems to impractically increase size of LTO data streamed.
5227 Keep the information if TYPE_METHODS was non-NULL. This is used
5228 by function.c and pretty printers. */
5229 if (TYPE_METHODS (type
))
5230 TYPE_METHODS (type
) = error_mark_node
;
5231 if (TYPE_BINFO (type
))
5233 free_lang_data_in_binfo (TYPE_BINFO (type
));
5234 /* We need to preserve link to bases and virtual table for all
5235 polymorphic types to make devirtualization machinery working.
5236 Debug output cares only about bases, but output also
5237 virtual table pointers so merging of -fdevirtualize and
5238 -fno-devirtualize units is easier. */
5239 if ((!BINFO_VTABLE (TYPE_BINFO (type
))
5240 || !flag_devirtualize
)
5241 && ((!BINFO_N_BASE_BINFOS (TYPE_BINFO (type
))
5242 && !BINFO_VTABLE (TYPE_BINFO (type
)))
5243 || debug_info_level
!= DINFO_LEVEL_NONE
))
5244 TYPE_BINFO (type
) = NULL
;
5249 /* For non-aggregate types, clear out the language slot (which
5250 overloads TYPE_BINFO). */
5251 TYPE_LANG_SLOT_1 (type
) = NULL_TREE
;
5253 if (INTEGRAL_TYPE_P (type
)
5254 || SCALAR_FLOAT_TYPE_P (type
)
5255 || FIXED_POINT_TYPE_P (type
))
5257 free_lang_data_in_one_sizepos (&TYPE_MIN_VALUE (type
));
5258 free_lang_data_in_one_sizepos (&TYPE_MAX_VALUE (type
));
5262 free_lang_data_in_one_sizepos (&TYPE_SIZE (type
));
5263 free_lang_data_in_one_sizepos (&TYPE_SIZE_UNIT (type
));
5265 if (TYPE_CONTEXT (type
)
5266 && TREE_CODE (TYPE_CONTEXT (type
)) == BLOCK
)
5268 tree ctx
= TYPE_CONTEXT (type
);
5271 ctx
= BLOCK_SUPERCONTEXT (ctx
);
5273 while (ctx
&& TREE_CODE (ctx
) == BLOCK
);
5274 TYPE_CONTEXT (type
) = ctx
;
5279 /* Return true if DECL may need an assembler name to be set. */
5282 need_assembler_name_p (tree decl
)
5284 /* We use DECL_ASSEMBLER_NAME to hold mangled type names for One Definition
5285 Rule merging. This makes type_odr_p to return true on those types during
5286 LTO and by comparing the mangled name, we can say what types are intended
5287 to be equivalent across compilation unit.
5289 We do not store names of type_in_anonymous_namespace_p.
5291 Record, union and enumeration type have linkage that allows use
5292 to check type_in_anonymous_namespace_p. We do not mangle compound types
5293 that always can be compared structurally.
5295 Similarly for builtin types, we compare properties of their main variant.
5296 A special case are integer types where mangling do make differences
5297 between char/signed char/unsigned char etc. Storing name for these makes
5298 e.g. -fno-signed-char/-fsigned-char mismatches to be handled well.
5299 See cp/mangle.c:write_builtin_type for details. */
5301 if (flag_lto_odr_type_mering
5302 && TREE_CODE (decl
) == TYPE_DECL
5304 && decl
== TYPE_NAME (TREE_TYPE (decl
))
5305 && TYPE_MAIN_VARIANT (TREE_TYPE (decl
)) == TREE_TYPE (decl
)
5306 && !TYPE_ARTIFICIAL (TREE_TYPE (decl
))
5307 && (type_with_linkage_p (TREE_TYPE (decl
))
5308 || TREE_CODE (TREE_TYPE (decl
)) == INTEGER_TYPE
)
5309 && !variably_modified_type_p (TREE_TYPE (decl
), NULL_TREE
))
5310 return !DECL_ASSEMBLER_NAME_SET_P (decl
);
5311 /* Only FUNCTION_DECLs and VAR_DECLs are considered. */
5312 if (!VAR_OR_FUNCTION_DECL_P (decl
))
5315 /* If DECL already has its assembler name set, it does not need a
5317 if (!HAS_DECL_ASSEMBLER_NAME_P (decl
)
5318 || DECL_ASSEMBLER_NAME_SET_P (decl
))
5321 /* Abstract decls do not need an assembler name. */
5322 if (DECL_ABSTRACT_P (decl
))
5325 /* For VAR_DECLs, only static, public and external symbols need an
5328 && !TREE_STATIC (decl
)
5329 && !TREE_PUBLIC (decl
)
5330 && !DECL_EXTERNAL (decl
))
5333 if (TREE_CODE (decl
) == FUNCTION_DECL
)
5335 /* Do not set assembler name on builtins. Allow RTL expansion to
5336 decide whether to expand inline or via a regular call. */
5337 if (DECL_BUILT_IN (decl
)
5338 && DECL_BUILT_IN_CLASS (decl
) != BUILT_IN_FRONTEND
)
5341 /* Functions represented in the callgraph need an assembler name. */
5342 if (cgraph_node::get (decl
) != NULL
)
5345 /* Unused and not public functions don't need an assembler name. */
5346 if (!TREE_USED (decl
) && !TREE_PUBLIC (decl
))
5354 /* Reset all language specific information still present in symbol
5358 free_lang_data_in_decl (tree decl
)
5360 gcc_assert (DECL_P (decl
));
5362 /* Give the FE a chance to remove its own data first. */
5363 lang_hooks
.free_lang_data (decl
);
5365 TREE_LANG_FLAG_0 (decl
) = 0;
5366 TREE_LANG_FLAG_1 (decl
) = 0;
5367 TREE_LANG_FLAG_2 (decl
) = 0;
5368 TREE_LANG_FLAG_3 (decl
) = 0;
5369 TREE_LANG_FLAG_4 (decl
) = 0;
5370 TREE_LANG_FLAG_5 (decl
) = 0;
5371 TREE_LANG_FLAG_6 (decl
) = 0;
5373 free_lang_data_in_one_sizepos (&DECL_SIZE (decl
));
5374 free_lang_data_in_one_sizepos (&DECL_SIZE_UNIT (decl
));
5375 if (TREE_CODE (decl
) == FIELD_DECL
)
5377 free_lang_data_in_one_sizepos (&DECL_FIELD_OFFSET (decl
));
5378 if (TREE_CODE (DECL_CONTEXT (decl
)) == QUAL_UNION_TYPE
)
5379 DECL_QUALIFIER (decl
) = NULL_TREE
;
5382 if (TREE_CODE (decl
) == FUNCTION_DECL
)
5384 struct cgraph_node
*node
;
5385 if (!(node
= cgraph_node::get (decl
))
5386 || (!node
->definition
&& !node
->clones
))
5389 node
->release_body ();
5392 release_function_body (decl
);
5393 DECL_ARGUMENTS (decl
) = NULL
;
5394 DECL_RESULT (decl
) = NULL
;
5395 DECL_INITIAL (decl
) = error_mark_node
;
5398 if (gimple_has_body_p (decl
) || (node
&& node
->thunk
.thunk_p
))
5402 /* If DECL has a gimple body, then the context for its
5403 arguments must be DECL. Otherwise, it doesn't really
5404 matter, as we will not be emitting any code for DECL. In
5405 general, there may be other instances of DECL created by
5406 the front end and since PARM_DECLs are generally shared,
5407 their DECL_CONTEXT changes as the replicas of DECL are
5408 created. The only time where DECL_CONTEXT is important
5409 is for the FUNCTION_DECLs that have a gimple body (since
5410 the PARM_DECL will be used in the function's body). */
5411 for (t
= DECL_ARGUMENTS (decl
); t
; t
= TREE_CHAIN (t
))
5412 DECL_CONTEXT (t
) = decl
;
5413 if (!DECL_FUNCTION_SPECIFIC_TARGET (decl
))
5414 DECL_FUNCTION_SPECIFIC_TARGET (decl
)
5415 = target_option_default_node
;
5416 if (!DECL_FUNCTION_SPECIFIC_OPTIMIZATION (decl
))
5417 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (decl
)
5418 = optimization_default_node
;
5421 /* DECL_SAVED_TREE holds the GENERIC representation for DECL.
5422 At this point, it is not needed anymore. */
5423 DECL_SAVED_TREE (decl
) = NULL_TREE
;
5425 /* Clear the abstract origin if it refers to a method. Otherwise
5426 dwarf2out.c will ICE as we clear TYPE_METHODS and thus the
5427 origin will not be output correctly. */
5428 if (DECL_ABSTRACT_ORIGIN (decl
)
5429 && DECL_CONTEXT (DECL_ABSTRACT_ORIGIN (decl
))
5430 && RECORD_OR_UNION_TYPE_P
5431 (DECL_CONTEXT (DECL_ABSTRACT_ORIGIN (decl
))))
5432 DECL_ABSTRACT_ORIGIN (decl
) = NULL_TREE
;
5434 /* Sometimes the C++ frontend doesn't manage to transform a temporary
5435 DECL_VINDEX referring to itself into a vtable slot number as it
5436 should. Happens with functions that are copied and then forgotten
5437 about. Just clear it, it won't matter anymore. */
5438 if (DECL_VINDEX (decl
) && !tree_fits_shwi_p (DECL_VINDEX (decl
)))
5439 DECL_VINDEX (decl
) = NULL_TREE
;
5441 else if (VAR_P (decl
))
5443 if ((DECL_EXTERNAL (decl
)
5444 && (!TREE_STATIC (decl
) || !TREE_READONLY (decl
)))
5445 || (decl_function_context (decl
) && !TREE_STATIC (decl
)))
5446 DECL_INITIAL (decl
) = NULL_TREE
;
5448 else if (TREE_CODE (decl
) == TYPE_DECL
)
5450 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
5451 DECL_VISIBILITY_SPECIFIED (decl
) = 0;
5452 DECL_INITIAL (decl
) = NULL_TREE
;
5454 else if (TREE_CODE (decl
) == FIELD_DECL
)
5455 DECL_INITIAL (decl
) = NULL_TREE
;
5456 else if (TREE_CODE (decl
) == TRANSLATION_UNIT_DECL
5457 && DECL_INITIAL (decl
)
5458 && TREE_CODE (DECL_INITIAL (decl
)) == BLOCK
)
5460 /* Strip builtins from the translation-unit BLOCK. We still have targets
5461 without builtin_decl_explicit support and also builtins are shared
5462 nodes and thus we can't use TREE_CHAIN in multiple lists. */
5463 tree
*nextp
= &BLOCK_VARS (DECL_INITIAL (decl
));
5467 if (TREE_CODE (var
) == FUNCTION_DECL
5468 && DECL_BUILT_IN (var
))
5469 *nextp
= TREE_CHAIN (var
);
5471 nextp
= &TREE_CHAIN (var
);
5477 /* Data used when collecting DECLs and TYPEs for language data removal. */
5479 struct free_lang_data_d
5481 free_lang_data_d () : decls (100), types (100) {}
5483 /* Worklist to avoid excessive recursion. */
5484 auto_vec
<tree
> worklist
;
5486 /* Set of traversed objects. Used to avoid duplicate visits. */
5487 hash_set
<tree
> pset
;
5489 /* Array of symbols to process with free_lang_data_in_decl. */
5490 auto_vec
<tree
> decls
;
5492 /* Array of types to process with free_lang_data_in_type. */
5493 auto_vec
<tree
> types
;
5497 /* Save all language fields needed to generate proper debug information
5498 for DECL. This saves most fields cleared out by free_lang_data_in_decl. */
5501 save_debug_info_for_decl (tree t
)
5503 /*struct saved_debug_info_d *sdi;*/
5505 gcc_assert (debug_info_level
> DINFO_LEVEL_TERSE
&& t
&& DECL_P (t
));
5507 /* FIXME. Partial implementation for saving debug info removed. */
5511 /* Save all language fields needed to generate proper debug information
5512 for TYPE. This saves most fields cleared out by free_lang_data_in_type. */
5515 save_debug_info_for_type (tree t
)
5517 /*struct saved_debug_info_d *sdi;*/
5519 gcc_assert (debug_info_level
> DINFO_LEVEL_TERSE
&& t
&& TYPE_P (t
));
5521 /* FIXME. Partial implementation for saving debug info removed. */
5525 /* Add type or decl T to one of the list of tree nodes that need their
5526 language data removed. The lists are held inside FLD. */
5529 add_tree_to_fld_list (tree t
, struct free_lang_data_d
*fld
)
5533 fld
->decls
.safe_push (t
);
5534 if (debug_info_level
> DINFO_LEVEL_TERSE
)
5535 save_debug_info_for_decl (t
);
5537 else if (TYPE_P (t
))
5539 fld
->types
.safe_push (t
);
5540 if (debug_info_level
> DINFO_LEVEL_TERSE
)
5541 save_debug_info_for_type (t
);
5547 /* Push tree node T into FLD->WORKLIST. */
5550 fld_worklist_push (tree t
, struct free_lang_data_d
*fld
)
5552 if (t
&& !is_lang_specific (t
) && !fld
->pset
.contains (t
))
5553 fld
->worklist
.safe_push ((t
));
5557 /* Operand callback helper for free_lang_data_in_node. *TP is the
5558 subtree operand being considered. */
5561 find_decls_types_r (tree
*tp
, int *ws
, void *data
)
5564 struct free_lang_data_d
*fld
= (struct free_lang_data_d
*) data
;
5566 if (TREE_CODE (t
) == TREE_LIST
)
5569 /* Language specific nodes will be removed, so there is no need
5570 to gather anything under them. */
5571 if (is_lang_specific (t
))
5579 /* Note that walk_tree does not traverse every possible field in
5580 decls, so we have to do our own traversals here. */
5581 add_tree_to_fld_list (t
, fld
);
5583 fld_worklist_push (DECL_NAME (t
), fld
);
5584 fld_worklist_push (DECL_CONTEXT (t
), fld
);
5585 fld_worklist_push (DECL_SIZE (t
), fld
);
5586 fld_worklist_push (DECL_SIZE_UNIT (t
), fld
);
5588 /* We are going to remove everything under DECL_INITIAL for
5589 TYPE_DECLs. No point walking them. */
5590 if (TREE_CODE (t
) != TYPE_DECL
)
5591 fld_worklist_push (DECL_INITIAL (t
), fld
);
5593 fld_worklist_push (DECL_ATTRIBUTES (t
), fld
);
5594 fld_worklist_push (DECL_ABSTRACT_ORIGIN (t
), fld
);
5596 if (TREE_CODE (t
) == FUNCTION_DECL
)
5598 fld_worklist_push (DECL_ARGUMENTS (t
), fld
);
5599 fld_worklist_push (DECL_RESULT (t
), fld
);
5601 else if (TREE_CODE (t
) == TYPE_DECL
)
5603 fld_worklist_push (DECL_ORIGINAL_TYPE (t
), fld
);
5605 else if (TREE_CODE (t
) == FIELD_DECL
)
5607 fld_worklist_push (DECL_FIELD_OFFSET (t
), fld
);
5608 fld_worklist_push (DECL_BIT_FIELD_TYPE (t
), fld
);
5609 fld_worklist_push (DECL_FIELD_BIT_OFFSET (t
), fld
);
5610 fld_worklist_push (DECL_FCONTEXT (t
), fld
);
5613 if ((VAR_P (t
) || TREE_CODE (t
) == PARM_DECL
)
5614 && DECL_HAS_VALUE_EXPR_P (t
))
5615 fld_worklist_push (DECL_VALUE_EXPR (t
), fld
);
5617 if (TREE_CODE (t
) != FIELD_DECL
5618 && TREE_CODE (t
) != TYPE_DECL
)
5619 fld_worklist_push (TREE_CHAIN (t
), fld
);
5622 else if (TYPE_P (t
))
5624 /* Note that walk_tree does not traverse every possible field in
5625 types, so we have to do our own traversals here. */
5626 add_tree_to_fld_list (t
, fld
);
5628 if (!RECORD_OR_UNION_TYPE_P (t
))
5629 fld_worklist_push (TYPE_CACHED_VALUES (t
), fld
);
5630 fld_worklist_push (TYPE_SIZE (t
), fld
);
5631 fld_worklist_push (TYPE_SIZE_UNIT (t
), fld
);
5632 fld_worklist_push (TYPE_ATTRIBUTES (t
), fld
);
5633 fld_worklist_push (TYPE_POINTER_TO (t
), fld
);
5634 fld_worklist_push (TYPE_REFERENCE_TO (t
), fld
);
5635 fld_worklist_push (TYPE_NAME (t
), fld
);
5636 /* Do not walk TYPE_NEXT_PTR_TO or TYPE_NEXT_REF_TO. We do not stream
5637 them and thus do not and want not to reach unused pointer types
5639 if (!POINTER_TYPE_P (t
))
5640 fld_worklist_push (TYPE_MINVAL (t
), fld
);
5641 if (!RECORD_OR_UNION_TYPE_P (t
))
5642 fld_worklist_push (TYPE_MAXVAL (t
), fld
);
5643 fld_worklist_push (TYPE_MAIN_VARIANT (t
), fld
);
5644 /* Do not walk TYPE_NEXT_VARIANT. We do not stream it and thus
5645 do not and want not to reach unused variants this way. */
5646 if (TYPE_CONTEXT (t
))
5648 tree ctx
= TYPE_CONTEXT (t
);
5649 /* We adjust BLOCK TYPE_CONTEXTs to the innermost non-BLOCK one.
5650 So push that instead. */
5651 while (ctx
&& TREE_CODE (ctx
) == BLOCK
)
5652 ctx
= BLOCK_SUPERCONTEXT (ctx
);
5653 fld_worklist_push (ctx
, fld
);
5655 /* Do not walk TYPE_CANONICAL. We do not stream it and thus do not
5656 and want not to reach unused types this way. */
5658 if (RECORD_OR_UNION_TYPE_P (t
) && TYPE_BINFO (t
))
5662 FOR_EACH_VEC_ELT (*BINFO_BASE_BINFOS (TYPE_BINFO (t
)), i
, tem
)
5663 fld_worklist_push (TREE_TYPE (tem
), fld
);
5664 tem
= BINFO_VIRTUALS (TYPE_BINFO (t
));
5666 /* The Java FE overloads BINFO_VIRTUALS for its own purpose. */
5667 && TREE_CODE (tem
) == TREE_LIST
)
5670 fld_worklist_push (TREE_VALUE (tem
), fld
);
5671 tem
= TREE_CHAIN (tem
);
5675 if (RECORD_OR_UNION_TYPE_P (t
))
5678 /* Push all TYPE_FIELDS - there can be interleaving interesting
5679 and non-interesting things. */
5680 tem
= TYPE_FIELDS (t
);
5683 if (TREE_CODE (tem
) == FIELD_DECL
5684 || (TREE_CODE (tem
) == TYPE_DECL
5685 && !DECL_IGNORED_P (tem
)
5686 && debug_info_level
> DINFO_LEVEL_TERSE
5687 && !is_redundant_typedef (tem
)))
5688 fld_worklist_push (tem
, fld
);
5689 tem
= TREE_CHAIN (tem
);
5693 fld_worklist_push (TYPE_STUB_DECL (t
), fld
);
5696 else if (TREE_CODE (t
) == BLOCK
)
5699 for (tem
= BLOCK_VARS (t
); tem
; tem
= TREE_CHAIN (tem
))
5700 fld_worklist_push (tem
, fld
);
5701 for (tem
= BLOCK_SUBBLOCKS (t
); tem
; tem
= BLOCK_CHAIN (tem
))
5702 fld_worklist_push (tem
, fld
);
5703 fld_worklist_push (BLOCK_ABSTRACT_ORIGIN (t
), fld
);
5706 if (TREE_CODE (t
) != IDENTIFIER_NODE
5707 && CODE_CONTAINS_STRUCT (TREE_CODE (t
), TS_TYPED
))
5708 fld_worklist_push (TREE_TYPE (t
), fld
);
5714 /* Find decls and types in T. */
5717 find_decls_types (tree t
, struct free_lang_data_d
*fld
)
5721 if (!fld
->pset
.contains (t
))
5722 walk_tree (&t
, find_decls_types_r
, fld
, &fld
->pset
);
5723 if (fld
->worklist
.is_empty ())
5725 t
= fld
->worklist
.pop ();
5729 /* Translate all the types in LIST with the corresponding runtime
5733 get_eh_types_for_runtime (tree list
)
5737 if (list
== NULL_TREE
)
5740 head
= build_tree_list (0, lookup_type_for_runtime (TREE_VALUE (list
)));
5742 list
= TREE_CHAIN (list
);
5745 tree n
= build_tree_list (0, lookup_type_for_runtime (TREE_VALUE (list
)));
5746 TREE_CHAIN (prev
) = n
;
5747 prev
= TREE_CHAIN (prev
);
5748 list
= TREE_CHAIN (list
);
5755 /* Find decls and types referenced in EH region R and store them in
5756 FLD->DECLS and FLD->TYPES. */
5759 find_decls_types_in_eh_region (eh_region r
, struct free_lang_data_d
*fld
)
5770 /* The types referenced in each catch must first be changed to the
5771 EH types used at runtime. This removes references to FE types
5773 for (c
= r
->u
.eh_try
.first_catch
; c
; c
= c
->next_catch
)
5775 c
->type_list
= get_eh_types_for_runtime (c
->type_list
);
5776 walk_tree (&c
->type_list
, find_decls_types_r
, fld
, &fld
->pset
);
5781 case ERT_ALLOWED_EXCEPTIONS
:
5782 r
->u
.allowed
.type_list
5783 = get_eh_types_for_runtime (r
->u
.allowed
.type_list
);
5784 walk_tree (&r
->u
.allowed
.type_list
, find_decls_types_r
, fld
, &fld
->pset
);
5787 case ERT_MUST_NOT_THROW
:
5788 walk_tree (&r
->u
.must_not_throw
.failure_decl
,
5789 find_decls_types_r
, fld
, &fld
->pset
);
5795 /* Find decls and types referenced in cgraph node N and store them in
5796 FLD->DECLS and FLD->TYPES. Unlike pass_referenced_vars, this will
5797 look for *every* kind of DECL and TYPE node reachable from N,
5798 including those embedded inside types and decls (i.e,, TYPE_DECLs,
5799 NAMESPACE_DECLs, etc). */
5802 find_decls_types_in_node (struct cgraph_node
*n
, struct free_lang_data_d
*fld
)
5805 struct function
*fn
;
5809 find_decls_types (n
->decl
, fld
);
5811 if (!gimple_has_body_p (n
->decl
))
5814 gcc_assert (current_function_decl
== NULL_TREE
&& cfun
== NULL
);
5816 fn
= DECL_STRUCT_FUNCTION (n
->decl
);
5818 /* Traverse locals. */
5819 FOR_EACH_LOCAL_DECL (fn
, ix
, t
)
5820 find_decls_types (t
, fld
);
5822 /* Traverse EH regions in FN. */
5825 FOR_ALL_EH_REGION_FN (r
, fn
)
5826 find_decls_types_in_eh_region (r
, fld
);
5829 /* Traverse every statement in FN. */
5830 FOR_EACH_BB_FN (bb
, fn
)
5833 gimple_stmt_iterator si
;
5836 for (psi
= gsi_start_phis (bb
); !gsi_end_p (psi
); gsi_next (&psi
))
5838 gphi
*phi
= psi
.phi ();
5840 for (i
= 0; i
< gimple_phi_num_args (phi
); i
++)
5842 tree
*arg_p
= gimple_phi_arg_def_ptr (phi
, i
);
5843 find_decls_types (*arg_p
, fld
);
5847 for (si
= gsi_start_bb (bb
); !gsi_end_p (si
); gsi_next (&si
))
5849 gimple
*stmt
= gsi_stmt (si
);
5851 if (is_gimple_call (stmt
))
5852 find_decls_types (gimple_call_fntype (stmt
), fld
);
5854 for (i
= 0; i
< gimple_num_ops (stmt
); i
++)
5856 tree arg
= gimple_op (stmt
, i
);
5857 find_decls_types (arg
, fld
);
5864 /* Find decls and types referenced in varpool node N and store them in
5865 FLD->DECLS and FLD->TYPES. Unlike pass_referenced_vars, this will
5866 look for *every* kind of DECL and TYPE node reachable from N,
5867 including those embedded inside types and decls (i.e,, TYPE_DECLs,
5868 NAMESPACE_DECLs, etc). */
5871 find_decls_types_in_var (varpool_node
*v
, struct free_lang_data_d
*fld
)
5873 find_decls_types (v
->decl
, fld
);
5876 /* If T needs an assembler name, have one created for it. */
5879 assign_assembler_name_if_needed (tree t
)
5881 if (need_assembler_name_p (t
))
5883 /* When setting DECL_ASSEMBLER_NAME, the C++ mangler may emit
5884 diagnostics that use input_location to show locus
5885 information. The problem here is that, at this point,
5886 input_location is generally anchored to the end of the file
5887 (since the parser is long gone), so we don't have a good
5888 position to pin it to.
5890 To alleviate this problem, this uses the location of T's
5891 declaration. Examples of this are
5892 testsuite/g++.dg/template/cond2.C and
5893 testsuite/g++.dg/template/pr35240.C. */
5894 location_t saved_location
= input_location
;
5895 input_location
= DECL_SOURCE_LOCATION (t
);
5897 decl_assembler_name (t
);
5899 input_location
= saved_location
;
5904 /* Free language specific information for every operand and expression
5905 in every node of the call graph. This process operates in three stages:
5907 1- Every callgraph node and varpool node is traversed looking for
5908 decls and types embedded in them. This is a more exhaustive
5909 search than that done by find_referenced_vars, because it will
5910 also collect individual fields, decls embedded in types, etc.
5912 2- All the decls found are sent to free_lang_data_in_decl.
5914 3- All the types found are sent to free_lang_data_in_type.
5916 The ordering between decls and types is important because
5917 free_lang_data_in_decl sets assembler names, which includes
5918 mangling. So types cannot be freed up until assembler names have
5922 free_lang_data_in_cgraph (void)
5924 struct cgraph_node
*n
;
5926 struct free_lang_data_d fld
;
5931 /* Find decls and types in the body of every function in the callgraph. */
5932 FOR_EACH_FUNCTION (n
)
5933 find_decls_types_in_node (n
, &fld
);
5935 FOR_EACH_VEC_SAFE_ELT (alias_pairs
, i
, p
)
5936 find_decls_types (p
->decl
, &fld
);
5938 /* Find decls and types in every varpool symbol. */
5939 FOR_EACH_VARIABLE (v
)
5940 find_decls_types_in_var (v
, &fld
);
5942 /* Set the assembler name on every decl found. We need to do this
5943 now because free_lang_data_in_decl will invalidate data needed
5944 for mangling. This breaks mangling on interdependent decls. */
5945 FOR_EACH_VEC_ELT (fld
.decls
, i
, t
)
5946 assign_assembler_name_if_needed (t
);
5948 /* Traverse every decl found freeing its language data. */
5949 FOR_EACH_VEC_ELT (fld
.decls
, i
, t
)
5950 free_lang_data_in_decl (t
);
5952 /* Traverse every type found freeing its language data. */
5953 FOR_EACH_VEC_ELT (fld
.types
, i
, t
)
5954 free_lang_data_in_type (t
);
5957 FOR_EACH_VEC_ELT (fld
.types
, i
, t
)
5963 /* Free resources that are used by FE but are not needed once they are done. */
5966 free_lang_data (void)
5970 /* If we are the LTO frontend we have freed lang-specific data already. */
5972 || (!flag_generate_lto
&& !flag_generate_offload
))
5975 /* Allocate and assign alias sets to the standard integer types
5976 while the slots are still in the way the frontends generated them. */
5977 for (i
= 0; i
< itk_none
; ++i
)
5978 if (integer_types
[i
])
5979 TYPE_ALIAS_SET (integer_types
[i
]) = get_alias_set (integer_types
[i
]);
5981 /* Traverse the IL resetting language specific information for
5982 operands, expressions, etc. */
5983 free_lang_data_in_cgraph ();
5985 /* Create gimple variants for common types. */
5986 for (unsigned i
= 0;
5987 i
< sizeof (builtin_structptr_types
) / sizeof (builtin_structptr_type
);
5989 builtin_structptr_types
[i
].node
= builtin_structptr_types
[i
].base
;
5991 /* Reset some langhooks. Do not reset types_compatible_p, it may
5992 still be used indirectly via the get_alias_set langhook. */
5993 lang_hooks
.dwarf_name
= lhd_dwarf_name
;
5994 lang_hooks
.decl_printable_name
= gimple_decl_printable_name
;
5995 lang_hooks
.gimplify_expr
= lhd_gimplify_expr
;
5997 /* We do not want the default decl_assembler_name implementation,
5998 rather if we have fixed everything we want a wrapper around it
5999 asserting that all non-local symbols already got their assembler
6000 name and only produce assembler names for local symbols. Or rather
6001 make sure we never call decl_assembler_name on local symbols and
6002 devise a separate, middle-end private scheme for it. */
6004 /* Reset diagnostic machinery. */
6005 tree_diagnostics_defaults (global_dc
);
6013 const pass_data pass_data_ipa_free_lang_data
=
6015 SIMPLE_IPA_PASS
, /* type */
6016 "*free_lang_data", /* name */
6017 OPTGROUP_NONE
, /* optinfo_flags */
6018 TV_IPA_FREE_LANG_DATA
, /* tv_id */
6019 0, /* properties_required */
6020 0, /* properties_provided */
6021 0, /* properties_destroyed */
6022 0, /* todo_flags_start */
6023 0, /* todo_flags_finish */
6026 class pass_ipa_free_lang_data
: public simple_ipa_opt_pass
6029 pass_ipa_free_lang_data (gcc::context
*ctxt
)
6030 : simple_ipa_opt_pass (pass_data_ipa_free_lang_data
, ctxt
)
6033 /* opt_pass methods: */
6034 virtual unsigned int execute (function
*) { return free_lang_data (); }
6036 }; // class pass_ipa_free_lang_data
6040 simple_ipa_opt_pass
*
6041 make_pass_ipa_free_lang_data (gcc::context
*ctxt
)
6043 return new pass_ipa_free_lang_data (ctxt
);
6046 /* The backbone of is_attribute_p(). ATTR_LEN is the string length of
6047 ATTR_NAME. Also used internally by remove_attribute(). */
6049 private_is_attribute_p (const char *attr_name
, size_t attr_len
, const_tree ident
)
6051 size_t ident_len
= IDENTIFIER_LENGTH (ident
);
6053 if (ident_len
== attr_len
)
6055 if (id_equal (ident
, attr_name
))
6058 else if (ident_len
== attr_len
+ 4)
6060 /* There is the possibility that ATTR is 'text' and IDENT is
6062 const char *p
= IDENTIFIER_POINTER (ident
);
6063 if (p
[0] == '_' && p
[1] == '_'
6064 && p
[ident_len
- 2] == '_' && p
[ident_len
- 1] == '_'
6065 && strncmp (attr_name
, p
+ 2, attr_len
) == 0)
6072 /* The backbone of lookup_attribute(). ATTR_LEN is the string length
6073 of ATTR_NAME, and LIST is not NULL_TREE. */
6075 private_lookup_attribute (const char *attr_name
, size_t attr_len
, tree list
)
6079 size_t ident_len
= IDENTIFIER_LENGTH (get_attribute_name (list
));
6081 if (ident_len
== attr_len
)
6083 if (!strcmp (attr_name
,
6084 IDENTIFIER_POINTER (get_attribute_name (list
))))
6087 /* TODO: If we made sure that attributes were stored in the
6088 canonical form without '__...__' (ie, as in 'text' as opposed
6089 to '__text__') then we could avoid the following case. */
6090 else if (ident_len
== attr_len
+ 4)
6092 const char *p
= IDENTIFIER_POINTER (get_attribute_name (list
));
6093 if (p
[0] == '_' && p
[1] == '_'
6094 && p
[ident_len
- 2] == '_' && p
[ident_len
- 1] == '_'
6095 && strncmp (attr_name
, p
+ 2, attr_len
) == 0)
6098 list
= TREE_CHAIN (list
);
6104 /* Given an attribute name ATTR_NAME and a list of attributes LIST,
6105 return a pointer to the attribute's list first element if the attribute
6106 starts with ATTR_NAME. ATTR_NAME must be in the form 'text' (not
6110 private_lookup_attribute_by_prefix (const char *attr_name
, size_t attr_len
,
6115 size_t ident_len
= IDENTIFIER_LENGTH (get_attribute_name (list
));
6117 if (attr_len
> ident_len
)
6119 list
= TREE_CHAIN (list
);
6123 const char *p
= IDENTIFIER_POINTER (get_attribute_name (list
));
6125 if (strncmp (attr_name
, p
, attr_len
) == 0)
6128 /* TODO: If we made sure that attributes were stored in the
6129 canonical form without '__...__' (ie, as in 'text' as opposed
6130 to '__text__') then we could avoid the following case. */
6131 if (p
[0] == '_' && p
[1] == '_' &&
6132 strncmp (attr_name
, p
+ 2, attr_len
) == 0)
6135 list
= TREE_CHAIN (list
);
6142 /* A variant of lookup_attribute() that can be used with an identifier
6143 as the first argument, and where the identifier can be either
6144 'text' or '__text__'.
6146 Given an attribute ATTR_IDENTIFIER, and a list of attributes LIST,
6147 return a pointer to the attribute's list element if the attribute
6148 is part of the list, or NULL_TREE if not found. If the attribute
6149 appears more than once, this only returns the first occurrence; the
6150 TREE_CHAIN of the return value should be passed back in if further
6151 occurrences are wanted. ATTR_IDENTIFIER must be an identifier but
6152 can be in the form 'text' or '__text__'. */
6154 lookup_ident_attribute (tree attr_identifier
, tree list
)
6156 gcc_checking_assert (TREE_CODE (attr_identifier
) == IDENTIFIER_NODE
);
6160 gcc_checking_assert (TREE_CODE (get_attribute_name (list
))
6161 == IDENTIFIER_NODE
);
6163 if (cmp_attrib_identifiers (attr_identifier
,
6164 get_attribute_name (list
)))
6167 list
= TREE_CHAIN (list
);
6173 /* Remove any instances of attribute ATTR_NAME in LIST and return the
6177 remove_attribute (const char *attr_name
, tree list
)
6180 size_t attr_len
= strlen (attr_name
);
6182 gcc_checking_assert (attr_name
[0] != '_');
6184 for (p
= &list
; *p
; )
6187 /* TODO: If we were storing attributes in normalized form, here
6188 we could use a simple strcmp(). */
6189 if (private_is_attribute_p (attr_name
, attr_len
, get_attribute_name (l
)))
6190 *p
= TREE_CHAIN (l
);
6192 p
= &TREE_CHAIN (l
);
6198 /* Return an attribute list that is the union of a1 and a2. */
6201 merge_attributes (tree a1
, tree a2
)
6205 /* Either one unset? Take the set one. */
6207 if ((attributes
= a1
) == 0)
6210 /* One that completely contains the other? Take it. */
6212 else if (a2
!= 0 && ! attribute_list_contained (a1
, a2
))
6214 if (attribute_list_contained (a2
, a1
))
6218 /* Pick the longest list, and hang on the other list. */
6220 if (list_length (a1
) < list_length (a2
))
6221 attributes
= a2
, a2
= a1
;
6223 for (; a2
!= 0; a2
= TREE_CHAIN (a2
))
6226 for (a
= lookup_ident_attribute (get_attribute_name (a2
),
6228 a
!= NULL_TREE
&& !attribute_value_equal (a
, a2
);
6229 a
= lookup_ident_attribute (get_attribute_name (a2
),
6234 a1
= copy_node (a2
);
6235 TREE_CHAIN (a1
) = attributes
;
6244 /* Given types T1 and T2, merge their attributes and return
6248 merge_type_attributes (tree t1
, tree t2
)
6250 return merge_attributes (TYPE_ATTRIBUTES (t1
),
6251 TYPE_ATTRIBUTES (t2
));
6254 /* Given decls OLDDECL and NEWDECL, merge their attributes and return
6258 merge_decl_attributes (tree olddecl
, tree newdecl
)
6260 return merge_attributes (DECL_ATTRIBUTES (olddecl
),
6261 DECL_ATTRIBUTES (newdecl
));
6264 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
6266 /* Specialization of merge_decl_attributes for various Windows targets.
6268 This handles the following situation:
6270 __declspec (dllimport) int foo;
6273 The second instance of `foo' nullifies the dllimport. */
6276 merge_dllimport_decl_attributes (tree old
, tree new_tree
)
6279 int delete_dllimport_p
= 1;
6281 /* What we need to do here is remove from `old' dllimport if it doesn't
6282 appear in `new'. dllimport behaves like extern: if a declaration is
6283 marked dllimport and a definition appears later, then the object
6284 is not dllimport'd. We also remove a `new' dllimport if the old list
6285 contains dllexport: dllexport always overrides dllimport, regardless
6286 of the order of declaration. */
6287 if (!VAR_OR_FUNCTION_DECL_P (new_tree
))
6288 delete_dllimport_p
= 0;
6289 else if (DECL_DLLIMPORT_P (new_tree
)
6290 && lookup_attribute ("dllexport", DECL_ATTRIBUTES (old
)))
6292 DECL_DLLIMPORT_P (new_tree
) = 0;
6293 warning (OPT_Wattributes
, "%q+D already declared with dllexport attribute: "
6294 "dllimport ignored", new_tree
);
6296 else if (DECL_DLLIMPORT_P (old
) && !DECL_DLLIMPORT_P (new_tree
))
6298 /* Warn about overriding a symbol that has already been used, e.g.:
6299 extern int __attribute__ ((dllimport)) foo;
6300 int* bar () {return &foo;}
6303 if (TREE_USED (old
))
6305 warning (0, "%q+D redeclared without dllimport attribute "
6306 "after being referenced with dll linkage", new_tree
);
6307 /* If we have used a variable's address with dllimport linkage,
6308 keep the old DECL_DLLIMPORT_P flag: the ADDR_EXPR using the
6309 decl may already have had TREE_CONSTANT computed.
6310 We still remove the attribute so that assembler code refers
6311 to '&foo rather than '_imp__foo'. */
6312 if (VAR_P (old
) && TREE_ADDRESSABLE (old
))
6313 DECL_DLLIMPORT_P (new_tree
) = 1;
6316 /* Let an inline definition silently override the external reference,
6317 but otherwise warn about attribute inconsistency. */
6318 else if (VAR_P (new_tree
) || !DECL_DECLARED_INLINE_P (new_tree
))
6319 warning (OPT_Wattributes
, "%q+D redeclared without dllimport attribute: "
6320 "previous dllimport ignored", new_tree
);
6323 delete_dllimport_p
= 0;
6325 a
= merge_attributes (DECL_ATTRIBUTES (old
), DECL_ATTRIBUTES (new_tree
));
6327 if (delete_dllimport_p
)
6328 a
= remove_attribute ("dllimport", a
);
6333 /* Handle a "dllimport" or "dllexport" attribute; arguments as in
6334 struct attribute_spec.handler. */
6337 handle_dll_attribute (tree
* pnode
, tree name
, tree args
, int flags
,
6343 /* These attributes may apply to structure and union types being created,
6344 but otherwise should pass to the declaration involved. */
6347 if (flags
& ((int) ATTR_FLAG_DECL_NEXT
| (int) ATTR_FLAG_FUNCTION_NEXT
6348 | (int) ATTR_FLAG_ARRAY_NEXT
))
6350 *no_add_attrs
= true;
6351 return tree_cons (name
, args
, NULL_TREE
);
6353 if (TREE_CODE (node
) == RECORD_TYPE
6354 || TREE_CODE (node
) == UNION_TYPE
)
6356 node
= TYPE_NAME (node
);
6362 warning (OPT_Wattributes
, "%qE attribute ignored",
6364 *no_add_attrs
= true;
6369 if (!VAR_OR_FUNCTION_DECL_P (node
) && TREE_CODE (node
) != TYPE_DECL
)
6371 *no_add_attrs
= true;
6372 warning (OPT_Wattributes
, "%qE attribute ignored",
6377 if (TREE_CODE (node
) == TYPE_DECL
6378 && TREE_CODE (TREE_TYPE (node
)) != RECORD_TYPE
6379 && TREE_CODE (TREE_TYPE (node
)) != UNION_TYPE
)
6381 *no_add_attrs
= true;
6382 warning (OPT_Wattributes
, "%qE attribute ignored",
6387 is_dllimport
= is_attribute_p ("dllimport", name
);
6389 /* Report error on dllimport ambiguities seen now before they cause
6393 /* Honor any target-specific overrides. */
6394 if (!targetm
.valid_dllimport_attribute_p (node
))
6395 *no_add_attrs
= true;
6397 else if (TREE_CODE (node
) == FUNCTION_DECL
6398 && DECL_DECLARED_INLINE_P (node
))
6400 warning (OPT_Wattributes
, "inline function %q+D declared as "
6401 " dllimport: attribute ignored", node
);
6402 *no_add_attrs
= true;
6404 /* Like MS, treat definition of dllimported variables and
6405 non-inlined functions on declaration as syntax errors. */
6406 else if (TREE_CODE (node
) == FUNCTION_DECL
&& DECL_INITIAL (node
))
6408 error ("function %q+D definition is marked dllimport", node
);
6409 *no_add_attrs
= true;
6412 else if (VAR_P (node
))
6414 if (DECL_INITIAL (node
))
6416 error ("variable %q+D definition is marked dllimport",
6418 *no_add_attrs
= true;
6421 /* `extern' needn't be specified with dllimport.
6422 Specify `extern' now and hope for the best. Sigh. */
6423 DECL_EXTERNAL (node
) = 1;
6424 /* Also, implicitly give dllimport'd variables declared within
6425 a function global scope, unless declared static. */
6426 if (current_function_decl
!= NULL_TREE
&& !TREE_STATIC (node
))
6427 TREE_PUBLIC (node
) = 1;
6430 if (*no_add_attrs
== false)
6431 DECL_DLLIMPORT_P (node
) = 1;
6433 else if (TREE_CODE (node
) == FUNCTION_DECL
6434 && DECL_DECLARED_INLINE_P (node
)
6435 && flag_keep_inline_dllexport
)
6436 /* An exported function, even if inline, must be emitted. */
6437 DECL_EXTERNAL (node
) = 0;
6439 /* Report error if symbol is not accessible at global scope. */
6440 if (!TREE_PUBLIC (node
) && VAR_OR_FUNCTION_DECL_P (node
))
6442 error ("external linkage required for symbol %q+D because of "
6443 "%qE attribute", node
, name
);
6444 *no_add_attrs
= true;
6447 /* A dllexport'd entity must have default visibility so that other
6448 program units (shared libraries or the main executable) can see
6449 it. A dllimport'd entity must have default visibility so that
6450 the linker knows that undefined references within this program
6451 unit can be resolved by the dynamic linker. */
6454 if (DECL_VISIBILITY_SPECIFIED (node
)
6455 && DECL_VISIBILITY (node
) != VISIBILITY_DEFAULT
)
6456 error ("%qE implies default visibility, but %qD has already "
6457 "been declared with a different visibility",
6459 DECL_VISIBILITY (node
) = VISIBILITY_DEFAULT
;
6460 DECL_VISIBILITY_SPECIFIED (node
) = 1;
6466 #endif /* TARGET_DLLIMPORT_DECL_ATTRIBUTES */
6468 /* Set the type qualifiers for TYPE to TYPE_QUALS, which is a bitmask
6469 of the various TYPE_QUAL values. */
6472 set_type_quals (tree type
, int type_quals
)
6474 TYPE_READONLY (type
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
6475 TYPE_VOLATILE (type
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
6476 TYPE_RESTRICT (type
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
6477 TYPE_ATOMIC (type
) = (type_quals
& TYPE_QUAL_ATOMIC
) != 0;
6478 TYPE_ADDR_SPACE (type
) = DECODE_QUAL_ADDR_SPACE (type_quals
);
6481 /* Returns true iff CAND and BASE have equivalent language-specific
6485 check_lang_type (const_tree cand
, const_tree base
)
6487 if (lang_hooks
.types
.type_hash_eq
== NULL
)
6489 /* type_hash_eq currently only applies to these types. */
6490 if (TREE_CODE (cand
) != FUNCTION_TYPE
6491 && TREE_CODE (cand
) != METHOD_TYPE
)
6493 return lang_hooks
.types
.type_hash_eq (cand
, base
);
6496 /* Returns true iff unqualified CAND and BASE are equivalent. */
6499 check_base_type (const_tree cand
, const_tree base
)
6501 return (TYPE_NAME (cand
) == TYPE_NAME (base
)
6502 /* Apparently this is needed for Objective-C. */
6503 && TYPE_CONTEXT (cand
) == TYPE_CONTEXT (base
)
6504 /* Check alignment. */
6505 && TYPE_ALIGN (cand
) == TYPE_ALIGN (base
)
6506 && attribute_list_equal (TYPE_ATTRIBUTES (cand
),
6507 TYPE_ATTRIBUTES (base
)));
6510 /* Returns true iff CAND is equivalent to BASE with TYPE_QUALS. */
6513 check_qualified_type (const_tree cand
, const_tree base
, int type_quals
)
6515 return (TYPE_QUALS (cand
) == type_quals
6516 && check_base_type (cand
, base
)
6517 && check_lang_type (cand
, base
));
6520 /* Returns true iff CAND is equivalent to BASE with ALIGN. */
6523 check_aligned_type (const_tree cand
, const_tree base
, unsigned int align
)
6525 return (TYPE_QUALS (cand
) == TYPE_QUALS (base
)
6526 && TYPE_NAME (cand
) == TYPE_NAME (base
)
6527 /* Apparently this is needed for Objective-C. */
6528 && TYPE_CONTEXT (cand
) == TYPE_CONTEXT (base
)
6529 /* Check alignment. */
6530 && TYPE_ALIGN (cand
) == align
6531 && attribute_list_equal (TYPE_ATTRIBUTES (cand
),
6532 TYPE_ATTRIBUTES (base
))
6533 && check_lang_type (cand
, base
));
6536 /* This function checks to see if TYPE matches the size one of the built-in
6537 atomic types, and returns that core atomic type. */
6540 find_atomic_core_type (tree type
)
6542 tree base_atomic_type
;
6544 /* Only handle complete types. */
6545 if (TYPE_SIZE (type
) == NULL_TREE
)
6548 HOST_WIDE_INT type_size
= tree_to_uhwi (TYPE_SIZE (type
));
6552 base_atomic_type
= atomicQI_type_node
;
6556 base_atomic_type
= atomicHI_type_node
;
6560 base_atomic_type
= atomicSI_type_node
;
6564 base_atomic_type
= atomicDI_type_node
;
6568 base_atomic_type
= atomicTI_type_node
;
6572 base_atomic_type
= NULL_TREE
;
6575 return base_atomic_type
;
6578 /* Return a version of the TYPE, qualified as indicated by the
6579 TYPE_QUALS, if one exists. If no qualified version exists yet,
6580 return NULL_TREE. */
6583 get_qualified_type (tree type
, int type_quals
)
6587 if (TYPE_QUALS (type
) == type_quals
)
6590 /* Search the chain of variants to see if there is already one there just
6591 like the one we need to have. If so, use that existing one. We must
6592 preserve the TYPE_NAME, since there is code that depends on this. */
6593 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
6594 if (check_qualified_type (t
, type
, type_quals
))
6600 /* Like get_qualified_type, but creates the type if it does not
6601 exist. This function never returns NULL_TREE. */
6604 build_qualified_type (tree type
, int type_quals MEM_STAT_DECL
)
6608 /* See if we already have the appropriate qualified variant. */
6609 t
= get_qualified_type (type
, type_quals
);
6611 /* If not, build it. */
6614 t
= build_variant_type_copy (type PASS_MEM_STAT
);
6615 set_type_quals (t
, type_quals
);
6617 if (((type_quals
& TYPE_QUAL_ATOMIC
) == TYPE_QUAL_ATOMIC
))
6619 /* See if this object can map to a basic atomic type. */
6620 tree atomic_type
= find_atomic_core_type (type
);
6623 /* Ensure the alignment of this type is compatible with
6624 the required alignment of the atomic type. */
6625 if (TYPE_ALIGN (atomic_type
) > TYPE_ALIGN (t
))
6626 SET_TYPE_ALIGN (t
, TYPE_ALIGN (atomic_type
));
6630 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
6631 /* Propagate structural equality. */
6632 SET_TYPE_STRUCTURAL_EQUALITY (t
);
6633 else if (TYPE_CANONICAL (type
) != type
)
6634 /* Build the underlying canonical type, since it is different
6637 tree c
= build_qualified_type (TYPE_CANONICAL (type
), type_quals
);
6638 TYPE_CANONICAL (t
) = TYPE_CANONICAL (c
);
6641 /* T is its own canonical type. */
6642 TYPE_CANONICAL (t
) = t
;
6649 /* Create a variant of type T with alignment ALIGN. */
6652 build_aligned_type (tree type
, unsigned int align
)
6656 if (TYPE_PACKED (type
)
6657 || TYPE_ALIGN (type
) == align
)
6660 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
6661 if (check_aligned_type (t
, type
, align
))
6664 t
= build_variant_type_copy (type
);
6665 SET_TYPE_ALIGN (t
, align
);
6666 TYPE_USER_ALIGN (t
) = 1;
6671 /* Create a new distinct copy of TYPE. The new type is made its own
6672 MAIN_VARIANT. If TYPE requires structural equality checks, the
6673 resulting type requires structural equality checks; otherwise, its
6674 TYPE_CANONICAL points to itself. */
6677 build_distinct_type_copy (tree type MEM_STAT_DECL
)
6679 tree t
= copy_node_stat (type PASS_MEM_STAT
);
6681 TYPE_POINTER_TO (t
) = 0;
6682 TYPE_REFERENCE_TO (t
) = 0;
6684 /* Set the canonical type either to a new equivalence class, or
6685 propagate the need for structural equality checks. */
6686 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
6687 SET_TYPE_STRUCTURAL_EQUALITY (t
);
6689 TYPE_CANONICAL (t
) = t
;
6691 /* Make it its own variant. */
6692 TYPE_MAIN_VARIANT (t
) = t
;
6693 TYPE_NEXT_VARIANT (t
) = 0;
6695 /* We do not record methods in type copies nor variants
6696 so we do not need to keep them up to date when new method
6698 if (RECORD_OR_UNION_TYPE_P (t
))
6699 TYPE_METHODS (t
) = NULL_TREE
;
6701 /* Note that it is now possible for TYPE_MIN_VALUE to be a value
6702 whose TREE_TYPE is not t. This can also happen in the Ada
6703 frontend when using subtypes. */
6708 /* Create a new variant of TYPE, equivalent but distinct. This is so
6709 the caller can modify it. TYPE_CANONICAL for the return type will
6710 be equivalent to TYPE_CANONICAL of TYPE, indicating that the types
6711 are considered equal by the language itself (or that both types
6712 require structural equality checks). */
6715 build_variant_type_copy (tree type MEM_STAT_DECL
)
6717 tree t
, m
= TYPE_MAIN_VARIANT (type
);
6719 t
= build_distinct_type_copy (type PASS_MEM_STAT
);
6721 /* Since we're building a variant, assume that it is a non-semantic
6722 variant. This also propagates TYPE_STRUCTURAL_EQUALITY_P. */
6723 TYPE_CANONICAL (t
) = TYPE_CANONICAL (type
);
6724 /* Type variants have no alias set defined. */
6725 TYPE_ALIAS_SET (t
) = -1;
6727 /* Add the new type to the chain of variants of TYPE. */
6728 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (m
);
6729 TYPE_NEXT_VARIANT (m
) = t
;
6730 TYPE_MAIN_VARIANT (t
) = m
;
6735 /* Return true if the from tree in both tree maps are equal. */
6738 tree_map_base_eq (const void *va
, const void *vb
)
6740 const struct tree_map_base
*const a
= (const struct tree_map_base
*) va
,
6741 *const b
= (const struct tree_map_base
*) vb
;
6742 return (a
->from
== b
->from
);
6745 /* Hash a from tree in a tree_base_map. */
6748 tree_map_base_hash (const void *item
)
6750 return htab_hash_pointer (((const struct tree_map_base
*)item
)->from
);
6753 /* Return true if this tree map structure is marked for garbage collection
6754 purposes. We simply return true if the from tree is marked, so that this
6755 structure goes away when the from tree goes away. */
6758 tree_map_base_marked_p (const void *p
)
6760 return ggc_marked_p (((const struct tree_map_base
*) p
)->from
);
6763 /* Hash a from tree in a tree_map. */
6766 tree_map_hash (const void *item
)
6768 return (((const struct tree_map
*) item
)->hash
);
6771 /* Hash a from tree in a tree_decl_map. */
6774 tree_decl_map_hash (const void *item
)
6776 return DECL_UID (((const struct tree_decl_map
*) item
)->base
.from
);
6779 /* Return the initialization priority for DECL. */
6782 decl_init_priority_lookup (tree decl
)
6784 symtab_node
*snode
= symtab_node::get (decl
);
6787 return DEFAULT_INIT_PRIORITY
;
6789 snode
->get_init_priority ();
6792 /* Return the finalization priority for DECL. */
6795 decl_fini_priority_lookup (tree decl
)
6797 cgraph_node
*node
= cgraph_node::get (decl
);
6800 return DEFAULT_INIT_PRIORITY
;
6802 node
->get_fini_priority ();
6805 /* Set the initialization priority for DECL to PRIORITY. */
6808 decl_init_priority_insert (tree decl
, priority_type priority
)
6810 struct symtab_node
*snode
;
6812 if (priority
== DEFAULT_INIT_PRIORITY
)
6814 snode
= symtab_node::get (decl
);
6818 else if (VAR_P (decl
))
6819 snode
= varpool_node::get_create (decl
);
6821 snode
= cgraph_node::get_create (decl
);
6822 snode
->set_init_priority (priority
);
6825 /* Set the finalization priority for DECL to PRIORITY. */
6828 decl_fini_priority_insert (tree decl
, priority_type priority
)
6830 struct cgraph_node
*node
;
6832 if (priority
== DEFAULT_INIT_PRIORITY
)
6834 node
= cgraph_node::get (decl
);
6839 node
= cgraph_node::get_create (decl
);
6840 node
->set_fini_priority (priority
);
6843 /* Print out the statistics for the DECL_DEBUG_EXPR hash table. */
6846 print_debug_expr_statistics (void)
6848 fprintf (stderr
, "DECL_DEBUG_EXPR hash: size %ld, %ld elements, %f collisions\n",
6849 (long) debug_expr_for_decl
->size (),
6850 (long) debug_expr_for_decl
->elements (),
6851 debug_expr_for_decl
->collisions ());
6854 /* Print out the statistics for the DECL_VALUE_EXPR hash table. */
6857 print_value_expr_statistics (void)
6859 fprintf (stderr
, "DECL_VALUE_EXPR hash: size %ld, %ld elements, %f collisions\n",
6860 (long) value_expr_for_decl
->size (),
6861 (long) value_expr_for_decl
->elements (),
6862 value_expr_for_decl
->collisions ());
6865 /* Lookup a debug expression for FROM, and return it if we find one. */
6868 decl_debug_expr_lookup (tree from
)
6870 struct tree_decl_map
*h
, in
;
6871 in
.base
.from
= from
;
6873 h
= debug_expr_for_decl
->find_with_hash (&in
, DECL_UID (from
));
6879 /* Insert a mapping FROM->TO in the debug expression hashtable. */
6882 decl_debug_expr_insert (tree from
, tree to
)
6884 struct tree_decl_map
*h
;
6886 h
= ggc_alloc
<tree_decl_map
> ();
6887 h
->base
.from
= from
;
6889 *debug_expr_for_decl
->find_slot_with_hash (h
, DECL_UID (from
), INSERT
) = h
;
6892 /* Lookup a value expression for FROM, and return it if we find one. */
6895 decl_value_expr_lookup (tree from
)
6897 struct tree_decl_map
*h
, in
;
6898 in
.base
.from
= from
;
6900 h
= value_expr_for_decl
->find_with_hash (&in
, DECL_UID (from
));
6906 /* Insert a mapping FROM->TO in the value expression hashtable. */
6909 decl_value_expr_insert (tree from
, tree to
)
6911 struct tree_decl_map
*h
;
6913 h
= ggc_alloc
<tree_decl_map
> ();
6914 h
->base
.from
= from
;
6916 *value_expr_for_decl
->find_slot_with_hash (h
, DECL_UID (from
), INSERT
) = h
;
6919 /* Lookup a vector of debug arguments for FROM, and return it if we
6923 decl_debug_args_lookup (tree from
)
6925 struct tree_vec_map
*h
, in
;
6927 if (!DECL_HAS_DEBUG_ARGS_P (from
))
6929 gcc_checking_assert (debug_args_for_decl
!= NULL
);
6930 in
.base
.from
= from
;
6931 h
= debug_args_for_decl
->find_with_hash (&in
, DECL_UID (from
));
6937 /* Insert a mapping FROM->empty vector of debug arguments in the value
6938 expression hashtable. */
6941 decl_debug_args_insert (tree from
)
6943 struct tree_vec_map
*h
;
6946 if (DECL_HAS_DEBUG_ARGS_P (from
))
6947 return decl_debug_args_lookup (from
);
6948 if (debug_args_for_decl
== NULL
)
6949 debug_args_for_decl
= hash_table
<tree_vec_map_cache_hasher
>::create_ggc (64);
6950 h
= ggc_alloc
<tree_vec_map
> ();
6951 h
->base
.from
= from
;
6953 loc
= debug_args_for_decl
->find_slot_with_hash (h
, DECL_UID (from
), INSERT
);
6955 DECL_HAS_DEBUG_ARGS_P (from
) = 1;
6959 /* Hashing of types so that we don't make duplicates.
6960 The entry point is `type_hash_canon'. */
6962 /* Generate the default hash code for TYPE. This is designed for
6963 speed, rather than maximum entropy. */
6966 type_hash_canon_hash (tree type
)
6968 inchash::hash hstate
;
6970 hstate
.add_int (TREE_CODE (type
));
6972 if (TREE_TYPE (type
))
6973 hstate
.add_object (TYPE_HASH (TREE_TYPE (type
)));
6975 for (tree t
= TYPE_ATTRIBUTES (type
); t
; t
= TREE_CHAIN (t
))
6976 /* Just the identifier is adequate to distinguish. */
6977 hstate
.add_object (IDENTIFIER_HASH_VALUE (get_attribute_name (t
)));
6979 switch (TREE_CODE (type
))
6982 hstate
.add_object (TYPE_HASH (TYPE_METHOD_BASETYPE (type
)));
6985 for (tree t
= TYPE_ARG_TYPES (type
); t
; t
= TREE_CHAIN (t
))
6986 if (TREE_VALUE (t
) != error_mark_node
)
6987 hstate
.add_object (TYPE_HASH (TREE_VALUE (t
)));
6991 hstate
.add_object (TYPE_HASH (TYPE_OFFSET_BASETYPE (type
)));
6996 if (TYPE_DOMAIN (type
))
6997 hstate
.add_object (TYPE_HASH (TYPE_DOMAIN (type
)));
6998 if (!AGGREGATE_TYPE_P (TREE_TYPE (type
)))
7000 unsigned typeless
= TYPE_TYPELESS_STORAGE (type
);
7001 hstate
.add_object (typeless
);
7008 tree t
= TYPE_MAX_VALUE (type
);
7010 t
= TYPE_MIN_VALUE (type
);
7011 for (int i
= 0; i
< TREE_INT_CST_NUNITS (t
); i
++)
7012 hstate
.add_object (TREE_INT_CST_ELT (t
, i
));
7017 case FIXED_POINT_TYPE
:
7019 unsigned prec
= TYPE_PRECISION (type
);
7020 hstate
.add_object (prec
);
7026 unsigned nunits
= TYPE_VECTOR_SUBPARTS (type
);
7027 hstate
.add_object (nunits
);
7035 return hstate
.end ();
7038 /* These are the Hashtable callback functions. */
7040 /* Returns true iff the types are equivalent. */
7043 type_cache_hasher::equal (type_hash
*a
, type_hash
*b
)
7045 /* First test the things that are the same for all types. */
7046 if (a
->hash
!= b
->hash
7047 || TREE_CODE (a
->type
) != TREE_CODE (b
->type
)
7048 || TREE_TYPE (a
->type
) != TREE_TYPE (b
->type
)
7049 || !attribute_list_equal (TYPE_ATTRIBUTES (a
->type
),
7050 TYPE_ATTRIBUTES (b
->type
))
7051 || (TREE_CODE (a
->type
) != COMPLEX_TYPE
7052 && TYPE_NAME (a
->type
) != TYPE_NAME (b
->type
)))
7055 /* Be careful about comparing arrays before and after the element type
7056 has been completed; don't compare TYPE_ALIGN unless both types are
7058 if (COMPLETE_TYPE_P (a
->type
) && COMPLETE_TYPE_P (b
->type
)
7059 && (TYPE_ALIGN (a
->type
) != TYPE_ALIGN (b
->type
)
7060 || TYPE_MODE (a
->type
) != TYPE_MODE (b
->type
)))
7063 switch (TREE_CODE (a
->type
))
7068 case REFERENCE_TYPE
:
7073 return TYPE_VECTOR_SUBPARTS (a
->type
) == TYPE_VECTOR_SUBPARTS (b
->type
);
7076 if (TYPE_VALUES (a
->type
) != TYPE_VALUES (b
->type
)
7077 && !(TYPE_VALUES (a
->type
)
7078 && TREE_CODE (TYPE_VALUES (a
->type
)) == TREE_LIST
7079 && TYPE_VALUES (b
->type
)
7080 && TREE_CODE (TYPE_VALUES (b
->type
)) == TREE_LIST
7081 && type_list_equal (TYPE_VALUES (a
->type
),
7082 TYPE_VALUES (b
->type
))))
7090 if (TYPE_PRECISION (a
->type
) != TYPE_PRECISION (b
->type
))
7092 return ((TYPE_MAX_VALUE (a
->type
) == TYPE_MAX_VALUE (b
->type
)
7093 || tree_int_cst_equal (TYPE_MAX_VALUE (a
->type
),
7094 TYPE_MAX_VALUE (b
->type
)))
7095 && (TYPE_MIN_VALUE (a
->type
) == TYPE_MIN_VALUE (b
->type
)
7096 || tree_int_cst_equal (TYPE_MIN_VALUE (a
->type
),
7097 TYPE_MIN_VALUE (b
->type
))));
7099 case FIXED_POINT_TYPE
:
7100 return TYPE_SATURATING (a
->type
) == TYPE_SATURATING (b
->type
);
7103 return TYPE_OFFSET_BASETYPE (a
->type
) == TYPE_OFFSET_BASETYPE (b
->type
);
7106 if (TYPE_METHOD_BASETYPE (a
->type
) == TYPE_METHOD_BASETYPE (b
->type
)
7107 && (TYPE_ARG_TYPES (a
->type
) == TYPE_ARG_TYPES (b
->type
)
7108 || (TYPE_ARG_TYPES (a
->type
)
7109 && TREE_CODE (TYPE_ARG_TYPES (a
->type
)) == TREE_LIST
7110 && TYPE_ARG_TYPES (b
->type
)
7111 && TREE_CODE (TYPE_ARG_TYPES (b
->type
)) == TREE_LIST
7112 && type_list_equal (TYPE_ARG_TYPES (a
->type
),
7113 TYPE_ARG_TYPES (b
->type
)))))
7117 /* Don't compare TYPE_TYPELESS_STORAGE flag on aggregates,
7118 where the flag should be inherited from the element type
7119 and can change after ARRAY_TYPEs are created; on non-aggregates
7120 compare it and hash it, scalars will never have that flag set
7121 and we need to differentiate between arrays created by different
7122 front-ends or middle-end created arrays. */
7123 return (TYPE_DOMAIN (a
->type
) == TYPE_DOMAIN (b
->type
)
7124 && (AGGREGATE_TYPE_P (TREE_TYPE (a
->type
))
7125 || (TYPE_TYPELESS_STORAGE (a
->type
)
7126 == TYPE_TYPELESS_STORAGE (b
->type
))));
7130 case QUAL_UNION_TYPE
:
7131 return (TYPE_FIELDS (a
->type
) == TYPE_FIELDS (b
->type
)
7132 || (TYPE_FIELDS (a
->type
)
7133 && TREE_CODE (TYPE_FIELDS (a
->type
)) == TREE_LIST
7134 && TYPE_FIELDS (b
->type
)
7135 && TREE_CODE (TYPE_FIELDS (b
->type
)) == TREE_LIST
7136 && type_list_equal (TYPE_FIELDS (a
->type
),
7137 TYPE_FIELDS (b
->type
))));
7140 if (TYPE_ARG_TYPES (a
->type
) == TYPE_ARG_TYPES (b
->type
)
7141 || (TYPE_ARG_TYPES (a
->type
)
7142 && TREE_CODE (TYPE_ARG_TYPES (a
->type
)) == TREE_LIST
7143 && TYPE_ARG_TYPES (b
->type
)
7144 && TREE_CODE (TYPE_ARG_TYPES (b
->type
)) == TREE_LIST
7145 && type_list_equal (TYPE_ARG_TYPES (a
->type
),
7146 TYPE_ARG_TYPES (b
->type
))))
7154 if (lang_hooks
.types
.type_hash_eq
!= NULL
)
7155 return lang_hooks
.types
.type_hash_eq (a
->type
, b
->type
);
7160 /* Given TYPE, and HASHCODE its hash code, return the canonical
7161 object for an identical type if one already exists.
7162 Otherwise, return TYPE, and record it as the canonical object.
7164 To use this function, first create a type of the sort you want.
7165 Then compute its hash code from the fields of the type that
7166 make it different from other similar types.
7167 Then call this function and use the value. */
7170 type_hash_canon (unsigned int hashcode
, tree type
)
7175 /* The hash table only contains main variants, so ensure that's what we're
7177 gcc_assert (TYPE_MAIN_VARIANT (type
) == type
);
7179 /* The TYPE_ALIGN field of a type is set by layout_type(), so we
7180 must call that routine before comparing TYPE_ALIGNs. */
7186 loc
= type_hash_table
->find_slot_with_hash (&in
, hashcode
, INSERT
);
7189 tree t1
= ((type_hash
*) *loc
)->type
;
7190 gcc_assert (TYPE_MAIN_VARIANT (t1
) == t1
);
7191 if (TYPE_UID (type
) + 1 == next_type_uid
)
7193 /* Free also min/max values and the cache for integer
7194 types. This can't be done in free_node, as LTO frees
7195 those on its own. */
7196 if (TREE_CODE (type
) == INTEGER_TYPE
)
7198 if (TYPE_MIN_VALUE (type
)
7199 && TREE_TYPE (TYPE_MIN_VALUE (type
)) == type
)
7200 ggc_free (TYPE_MIN_VALUE (type
));
7201 if (TYPE_MAX_VALUE (type
)
7202 && TREE_TYPE (TYPE_MAX_VALUE (type
)) == type
)
7203 ggc_free (TYPE_MAX_VALUE (type
));
7204 if (TYPE_CACHED_VALUES_P (type
))
7205 ggc_free (TYPE_CACHED_VALUES (type
));
7212 struct type_hash
*h
;
7214 h
= ggc_alloc
<type_hash
> ();
7224 print_type_hash_statistics (void)
7226 fprintf (stderr
, "Type hash: size %ld, %ld elements, %f collisions\n",
7227 (long) type_hash_table
->size (),
7228 (long) type_hash_table
->elements (),
7229 type_hash_table
->collisions ());
7232 /* Given two lists of attributes, return true if list l2 is
7233 equivalent to l1. */
7236 attribute_list_equal (const_tree l1
, const_tree l2
)
7241 return attribute_list_contained (l1
, l2
)
7242 && attribute_list_contained (l2
, l1
);
7245 /* Given two lists of attributes, return true if list L2 is
7246 completely contained within L1. */
7247 /* ??? This would be faster if attribute names were stored in a canonicalized
7248 form. Otherwise, if L1 uses `foo' and L2 uses `__foo__', the long method
7249 must be used to show these elements are equivalent (which they are). */
7250 /* ??? It's not clear that attributes with arguments will always be handled
7254 attribute_list_contained (const_tree l1
, const_tree l2
)
7258 /* First check the obvious, maybe the lists are identical. */
7262 /* Maybe the lists are similar. */
7263 for (t1
= l1
, t2
= l2
;
7265 && get_attribute_name (t1
) == get_attribute_name (t2
)
7266 && TREE_VALUE (t1
) == TREE_VALUE (t2
);
7267 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
7270 /* Maybe the lists are equal. */
7271 if (t1
== 0 && t2
== 0)
7274 for (; t2
!= 0; t2
= TREE_CHAIN (t2
))
7277 /* This CONST_CAST is okay because lookup_attribute does not
7278 modify its argument and the return value is assigned to a
7280 for (attr
= lookup_ident_attribute (get_attribute_name (t2
),
7281 CONST_CAST_TREE (l1
));
7282 attr
!= NULL_TREE
&& !attribute_value_equal (t2
, attr
);
7283 attr
= lookup_ident_attribute (get_attribute_name (t2
),
7287 if (attr
== NULL_TREE
)
7294 /* Given two lists of types
7295 (chains of TREE_LIST nodes with types in the TREE_VALUE slots)
7296 return 1 if the lists contain the same types in the same order.
7297 Also, the TREE_PURPOSEs must match. */
7300 type_list_equal (const_tree l1
, const_tree l2
)
7304 for (t1
= l1
, t2
= l2
; t1
&& t2
; t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
7305 if (TREE_VALUE (t1
) != TREE_VALUE (t2
)
7306 || (TREE_PURPOSE (t1
) != TREE_PURPOSE (t2
)
7307 && ! (1 == simple_cst_equal (TREE_PURPOSE (t1
), TREE_PURPOSE (t2
))
7308 && (TREE_TYPE (TREE_PURPOSE (t1
))
7309 == TREE_TYPE (TREE_PURPOSE (t2
))))))
7315 /* Returns the number of arguments to the FUNCTION_TYPE or METHOD_TYPE
7316 given by TYPE. If the argument list accepts variable arguments,
7317 then this function counts only the ordinary arguments. */
7320 type_num_arguments (const_tree type
)
7325 for (t
= TYPE_ARG_TYPES (type
); t
; t
= TREE_CHAIN (t
))
7326 /* If the function does not take a variable number of arguments,
7327 the last element in the list will have type `void'. */
7328 if (VOID_TYPE_P (TREE_VALUE (t
)))
7336 /* Nonzero if integer constants T1 and T2
7337 represent the same constant value. */
7340 tree_int_cst_equal (const_tree t1
, const_tree t2
)
7345 if (t1
== 0 || t2
== 0)
7348 if (TREE_CODE (t1
) == INTEGER_CST
7349 && TREE_CODE (t2
) == INTEGER_CST
7350 && wi::to_widest (t1
) == wi::to_widest (t2
))
7356 /* Return true if T is an INTEGER_CST whose numerical value (extended
7357 according to TYPE_UNSIGNED) fits in a signed HOST_WIDE_INT. */
7360 tree_fits_shwi_p (const_tree t
)
7362 return (t
!= NULL_TREE
7363 && TREE_CODE (t
) == INTEGER_CST
7364 && wi::fits_shwi_p (wi::to_widest (t
)));
7367 /* Return true if T is an INTEGER_CST whose numerical value (extended
7368 according to TYPE_UNSIGNED) fits in an unsigned HOST_WIDE_INT. */
7371 tree_fits_uhwi_p (const_tree t
)
7373 return (t
!= NULL_TREE
7374 && TREE_CODE (t
) == INTEGER_CST
7375 && wi::fits_uhwi_p (wi::to_widest (t
)));
7378 /* T is an INTEGER_CST whose numerical value (extended according to
7379 TYPE_UNSIGNED) fits in a signed HOST_WIDE_INT. Return that
7383 tree_to_shwi (const_tree t
)
7385 gcc_assert (tree_fits_shwi_p (t
));
7386 return TREE_INT_CST_LOW (t
);
7389 /* T is an INTEGER_CST whose numerical value (extended according to
7390 TYPE_UNSIGNED) fits in an unsigned HOST_WIDE_INT. Return that
7393 unsigned HOST_WIDE_INT
7394 tree_to_uhwi (const_tree t
)
7396 gcc_assert (tree_fits_uhwi_p (t
));
7397 return TREE_INT_CST_LOW (t
);
7400 /* Return the most significant (sign) bit of T. */
7403 tree_int_cst_sign_bit (const_tree t
)
7405 unsigned bitno
= TYPE_PRECISION (TREE_TYPE (t
)) - 1;
7407 return wi::extract_uhwi (t
, bitno
, 1);
7410 /* Return an indication of the sign of the integer constant T.
7411 The return value is -1 if T < 0, 0 if T == 0, and 1 if T > 0.
7412 Note that -1 will never be returned if T's type is unsigned. */
7415 tree_int_cst_sgn (const_tree t
)
7417 if (wi::eq_p (t
, 0))
7419 else if (TYPE_UNSIGNED (TREE_TYPE (t
)))
7421 else if (wi::neg_p (t
))
7427 /* Return the minimum number of bits needed to represent VALUE in a
7428 signed or unsigned type, UNSIGNEDP says which. */
7431 tree_int_cst_min_precision (tree value
, signop sgn
)
7433 /* If the value is negative, compute its negative minus 1. The latter
7434 adjustment is because the absolute value of the largest negative value
7435 is one larger than the largest positive value. This is equivalent to
7436 a bit-wise negation, so use that operation instead. */
7438 if (tree_int_cst_sgn (value
) < 0)
7439 value
= fold_build1 (BIT_NOT_EXPR
, TREE_TYPE (value
), value
);
7441 /* Return the number of bits needed, taking into account the fact
7442 that we need one more bit for a signed than unsigned type.
7443 If value is 0 or -1, the minimum precision is 1 no matter
7444 whether unsignedp is true or false. */
7446 if (integer_zerop (value
))
7449 return tree_floor_log2 (value
) + 1 + (sgn
== SIGNED
? 1 : 0) ;
7452 /* Return truthvalue of whether T1 is the same tree structure as T2.
7453 Return 1 if they are the same.
7454 Return 0 if they are understandably different.
7455 Return -1 if either contains tree structure not understood by
7459 simple_cst_equal (const_tree t1
, const_tree t2
)
7461 enum tree_code code1
, code2
;
7467 if (t1
== 0 || t2
== 0)
7470 code1
= TREE_CODE (t1
);
7471 code2
= TREE_CODE (t2
);
7473 if (CONVERT_EXPR_CODE_P (code1
) || code1
== NON_LVALUE_EXPR
)
7475 if (CONVERT_EXPR_CODE_P (code2
)
7476 || code2
== NON_LVALUE_EXPR
)
7477 return simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
7479 return simple_cst_equal (TREE_OPERAND (t1
, 0), t2
);
7482 else if (CONVERT_EXPR_CODE_P (code2
)
7483 || code2
== NON_LVALUE_EXPR
)
7484 return simple_cst_equal (t1
, TREE_OPERAND (t2
, 0));
7492 return wi::to_widest (t1
) == wi::to_widest (t2
);
7495 return real_identical (&TREE_REAL_CST (t1
), &TREE_REAL_CST (t2
));
7498 return FIXED_VALUES_IDENTICAL (TREE_FIXED_CST (t1
), TREE_FIXED_CST (t2
));
7501 return (TREE_STRING_LENGTH (t1
) == TREE_STRING_LENGTH (t2
)
7502 && ! memcmp (TREE_STRING_POINTER (t1
), TREE_STRING_POINTER (t2
),
7503 TREE_STRING_LENGTH (t1
)));
7507 unsigned HOST_WIDE_INT idx
;
7508 vec
<constructor_elt
, va_gc
> *v1
= CONSTRUCTOR_ELTS (t1
);
7509 vec
<constructor_elt
, va_gc
> *v2
= CONSTRUCTOR_ELTS (t2
);
7511 if (vec_safe_length (v1
) != vec_safe_length (v2
))
7514 for (idx
= 0; idx
< vec_safe_length (v1
); ++idx
)
7515 /* ??? Should we handle also fields here? */
7516 if (!simple_cst_equal ((*v1
)[idx
].value
, (*v2
)[idx
].value
))
7522 return simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
7525 cmp
= simple_cst_equal (CALL_EXPR_FN (t1
), CALL_EXPR_FN (t2
));
7528 if (call_expr_nargs (t1
) != call_expr_nargs (t2
))
7531 const_tree arg1
, arg2
;
7532 const_call_expr_arg_iterator iter1
, iter2
;
7533 for (arg1
= first_const_call_expr_arg (t1
, &iter1
),
7534 arg2
= first_const_call_expr_arg (t2
, &iter2
);
7536 arg1
= next_const_call_expr_arg (&iter1
),
7537 arg2
= next_const_call_expr_arg (&iter2
))
7539 cmp
= simple_cst_equal (arg1
, arg2
);
7543 return arg1
== arg2
;
7547 /* Special case: if either target is an unallocated VAR_DECL,
7548 it means that it's going to be unified with whatever the
7549 TARGET_EXPR is really supposed to initialize, so treat it
7550 as being equivalent to anything. */
7551 if ((TREE_CODE (TREE_OPERAND (t1
, 0)) == VAR_DECL
7552 && DECL_NAME (TREE_OPERAND (t1
, 0)) == NULL_TREE
7553 && !DECL_RTL_SET_P (TREE_OPERAND (t1
, 0)))
7554 || (TREE_CODE (TREE_OPERAND (t2
, 0)) == VAR_DECL
7555 && DECL_NAME (TREE_OPERAND (t2
, 0)) == NULL_TREE
7556 && !DECL_RTL_SET_P (TREE_OPERAND (t2
, 0))))
7559 cmp
= simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
7564 return simple_cst_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t2
, 1));
7566 case WITH_CLEANUP_EXPR
:
7567 cmp
= simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
7571 return simple_cst_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t1
, 1));
7574 if (TREE_OPERAND (t1
, 1) == TREE_OPERAND (t2
, 1))
7575 return simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
7589 /* This general rule works for most tree codes. All exceptions should be
7590 handled above. If this is a language-specific tree code, we can't
7591 trust what might be in the operand, so say we don't know
7593 if ((int) code1
>= (int) LAST_AND_UNUSED_TREE_CODE
)
7596 switch (TREE_CODE_CLASS (code1
))
7600 case tcc_comparison
:
7601 case tcc_expression
:
7605 for (i
= 0; i
< TREE_CODE_LENGTH (code1
); i
++)
7607 cmp
= simple_cst_equal (TREE_OPERAND (t1
, i
), TREE_OPERAND (t2
, i
));
7619 /* Compare the value of T, an INTEGER_CST, with U, an unsigned integer value.
7620 Return -1, 0, or 1 if the value of T is less than, equal to, or greater
7621 than U, respectively. */
7624 compare_tree_int (const_tree t
, unsigned HOST_WIDE_INT u
)
7626 if (tree_int_cst_sgn (t
) < 0)
7628 else if (!tree_fits_uhwi_p (t
))
7630 else if (TREE_INT_CST_LOW (t
) == u
)
7632 else if (TREE_INT_CST_LOW (t
) < u
)
7638 /* Return true if SIZE represents a constant size that is in bounds of
7639 what the middle-end and the backend accepts (covering not more than
7640 half of the address-space). */
7643 valid_constant_size_p (const_tree size
)
7645 if (! tree_fits_uhwi_p (size
)
7646 || TREE_OVERFLOW (size
)
7647 || tree_int_cst_sign_bit (size
) != 0)
7652 /* Return the precision of the type, or for a complex or vector type the
7653 precision of the type of its elements. */
7656 element_precision (const_tree type
)
7659 type
= TREE_TYPE (type
);
7660 enum tree_code code
= TREE_CODE (type
);
7661 if (code
== COMPLEX_TYPE
|| code
== VECTOR_TYPE
)
7662 type
= TREE_TYPE (type
);
7664 return TYPE_PRECISION (type
);
7667 /* Return true if CODE represents an associative tree code. Otherwise
7670 associative_tree_code (enum tree_code code
)
7689 /* Return true if CODE represents a commutative tree code. Otherwise
7692 commutative_tree_code (enum tree_code code
)
7698 case MULT_HIGHPART_EXPR
:
7706 case UNORDERED_EXPR
:
7710 case TRUTH_AND_EXPR
:
7711 case TRUTH_XOR_EXPR
:
7713 case WIDEN_MULT_EXPR
:
7714 case VEC_WIDEN_MULT_HI_EXPR
:
7715 case VEC_WIDEN_MULT_LO_EXPR
:
7716 case VEC_WIDEN_MULT_EVEN_EXPR
:
7717 case VEC_WIDEN_MULT_ODD_EXPR
:
7726 /* Return true if CODE represents a ternary tree code for which the
7727 first two operands are commutative. Otherwise return false. */
7729 commutative_ternary_tree_code (enum tree_code code
)
7733 case WIDEN_MULT_PLUS_EXPR
:
7734 case WIDEN_MULT_MINUS_EXPR
:
7745 /* Returns true if CODE can overflow. */
7748 operation_can_overflow (enum tree_code code
)
7756 /* Can overflow in various ways. */
7758 case TRUNC_DIV_EXPR
:
7759 case EXACT_DIV_EXPR
:
7760 case FLOOR_DIV_EXPR
:
7762 /* For INT_MIN / -1. */
7769 /* These operators cannot overflow. */
7774 /* Returns true if CODE operating on operands of type TYPE doesn't overflow, or
7775 ftrapv doesn't generate trapping insns for CODE. */
7778 operation_no_trapping_overflow (tree type
, enum tree_code code
)
7780 gcc_checking_assert (ANY_INTEGRAL_TYPE_P (type
));
7782 /* We don't generate instructions that trap on overflow for complex or vector
7784 if (!INTEGRAL_TYPE_P (type
))
7787 if (!TYPE_OVERFLOW_TRAPS (type
))
7797 /* These operators can overflow, and -ftrapv generates trapping code for
7800 case TRUNC_DIV_EXPR
:
7801 case EXACT_DIV_EXPR
:
7802 case FLOOR_DIV_EXPR
:
7805 /* These operators can overflow, but -ftrapv does not generate trapping
7809 /* These operators cannot overflow. */
7817 /* Generate a hash value for an expression. This can be used iteratively
7818 by passing a previous result as the HSTATE argument.
7820 This function is intended to produce the same hash for expressions which
7821 would compare equal using operand_equal_p. */
7823 add_expr (const_tree t
, inchash::hash
&hstate
, unsigned int flags
)
7826 enum tree_code code
;
7827 enum tree_code_class tclass
;
7829 if (t
== NULL_TREE
|| t
== error_mark_node
)
7831 hstate
.merge_hash (0);
7835 if (!(flags
& OEP_ADDRESS_OF
))
7838 code
= TREE_CODE (t
);
7842 /* Alas, constants aren't shared, so we can't rely on pointer
7845 hstate
.merge_hash (0);
7848 gcc_checking_assert (!(flags
& OEP_ADDRESS_OF
));
7849 for (i
= 0; i
< TREE_INT_CST_EXT_NUNITS (t
); i
++)
7850 hstate
.add_wide_int (TREE_INT_CST_ELT (t
, i
));
7855 if (!HONOR_SIGNED_ZEROS (t
) && real_zerop (t
))
7858 val2
= real_hash (TREE_REAL_CST_PTR (t
));
7859 hstate
.merge_hash (val2
);
7864 unsigned int val2
= fixed_hash (TREE_FIXED_CST_PTR (t
));
7865 hstate
.merge_hash (val2
);
7869 hstate
.add ((const void *) TREE_STRING_POINTER (t
),
7870 TREE_STRING_LENGTH (t
));
7873 inchash::add_expr (TREE_REALPART (t
), hstate
, flags
);
7874 inchash::add_expr (TREE_IMAGPART (t
), hstate
, flags
);
7879 for (i
= 0; i
< VECTOR_CST_NELTS (t
); ++i
)
7880 inchash::add_expr (VECTOR_CST_ELT (t
, i
), hstate
, flags
);
7884 /* We can just compare by pointer. */
7885 hstate
.add_wide_int (SSA_NAME_VERSION (t
));
7887 case PLACEHOLDER_EXPR
:
7888 /* The node itself doesn't matter. */
7895 /* A list of expressions, for a CALL_EXPR or as the elements of a
7897 for (; t
; t
= TREE_CHAIN (t
))
7898 inchash::add_expr (TREE_VALUE (t
), hstate
, flags
);
7902 unsigned HOST_WIDE_INT idx
;
7904 flags
&= ~OEP_ADDRESS_OF
;
7905 FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (t
), idx
, field
, value
)
7907 inchash::add_expr (field
, hstate
, flags
);
7908 inchash::add_expr (value
, hstate
, flags
);
7912 case STATEMENT_LIST
:
7914 tree_stmt_iterator i
;
7915 for (i
= tsi_start (CONST_CAST_TREE (t
));
7916 !tsi_end_p (i
); tsi_next (&i
))
7917 inchash::add_expr (tsi_stmt (i
), hstate
, flags
);
7921 for (i
= 0; i
< TREE_VEC_LENGTH (t
); ++i
)
7922 inchash::add_expr (TREE_VEC_ELT (t
, i
), hstate
, flags
);
7925 /* When referring to a built-in FUNCTION_DECL, use the __builtin__ form.
7926 Otherwise nodes that compare equal according to operand_equal_p might
7927 get different hash codes. However, don't do this for machine specific
7928 or front end builtins, since the function code is overloaded in those
7930 if (DECL_BUILT_IN_CLASS (t
) == BUILT_IN_NORMAL
7931 && builtin_decl_explicit_p (DECL_FUNCTION_CODE (t
)))
7933 t
= builtin_decl_explicit (DECL_FUNCTION_CODE (t
));
7934 code
= TREE_CODE (t
);
7938 tclass
= TREE_CODE_CLASS (code
);
7940 if (tclass
== tcc_declaration
)
7942 /* DECL's have a unique ID */
7943 hstate
.add_wide_int (DECL_UID (t
));
7945 else if (tclass
== tcc_comparison
&& !commutative_tree_code (code
))
7947 /* For comparisons that can be swapped, use the lower
7949 enum tree_code ccode
= swap_tree_comparison (code
);
7952 hstate
.add_object (ccode
);
7953 inchash::add_expr (TREE_OPERAND (t
, ccode
!= code
), hstate
, flags
);
7954 inchash::add_expr (TREE_OPERAND (t
, ccode
== code
), hstate
, flags
);
7956 else if (CONVERT_EXPR_CODE_P (code
))
7958 /* NOP_EXPR and CONVERT_EXPR are considered equal by
7960 enum tree_code ccode
= NOP_EXPR
;
7961 hstate
.add_object (ccode
);
7963 /* Don't hash the type, that can lead to having nodes which
7964 compare equal according to operand_equal_p, but which
7965 have different hash codes. Make sure to include signedness
7966 in the hash computation. */
7967 hstate
.add_int (TYPE_UNSIGNED (TREE_TYPE (t
)));
7968 inchash::add_expr (TREE_OPERAND (t
, 0), hstate
, flags
);
7970 /* For OEP_ADDRESS_OF, hash MEM_EXPR[&decl, 0] the same as decl. */
7971 else if (code
== MEM_REF
7972 && (flags
& OEP_ADDRESS_OF
) != 0
7973 && TREE_CODE (TREE_OPERAND (t
, 0)) == ADDR_EXPR
7974 && DECL_P (TREE_OPERAND (TREE_OPERAND (t
, 0), 0))
7975 && integer_zerop (TREE_OPERAND (t
, 1)))
7976 inchash::add_expr (TREE_OPERAND (TREE_OPERAND (t
, 0), 0),
7978 /* Don't ICE on FE specific trees, or their arguments etc.
7979 during operand_equal_p hash verification. */
7980 else if (!IS_EXPR_CODE_CLASS (tclass
))
7981 gcc_assert (flags
& OEP_HASH_CHECK
);
7984 unsigned int sflags
= flags
;
7986 hstate
.add_object (code
);
7991 gcc_checking_assert (!(flags
& OEP_ADDRESS_OF
));
7992 flags
|= OEP_ADDRESS_OF
;
7998 case TARGET_MEM_REF
:
7999 flags
&= ~OEP_ADDRESS_OF
;
8004 case ARRAY_RANGE_REF
:
8007 sflags
&= ~OEP_ADDRESS_OF
;
8011 flags
&= ~OEP_ADDRESS_OF
;
8015 case WIDEN_MULT_PLUS_EXPR
:
8016 case WIDEN_MULT_MINUS_EXPR
:
8018 /* The multiplication operands are commutative. */
8019 inchash::hash one
, two
;
8020 inchash::add_expr (TREE_OPERAND (t
, 0), one
, flags
);
8021 inchash::add_expr (TREE_OPERAND (t
, 1), two
, flags
);
8022 hstate
.add_commutative (one
, two
);
8023 inchash::add_expr (TREE_OPERAND (t
, 2), two
, flags
);
8028 if (CALL_EXPR_FN (t
) == NULL_TREE
)
8029 hstate
.add_int (CALL_EXPR_IFN (t
));
8033 /* For TARGET_EXPR, just hash on the TARGET_EXPR_SLOT.
8034 Usually different TARGET_EXPRs just should use
8035 different temporaries in their slots. */
8036 inchash::add_expr (TARGET_EXPR_SLOT (t
), hstate
, flags
);
8043 /* Don't hash the type, that can lead to having nodes which
8044 compare equal according to operand_equal_p, but which
8045 have different hash codes. */
8046 if (code
== NON_LVALUE_EXPR
)
8048 /* Make sure to include signness in the hash computation. */
8049 hstate
.add_int (TYPE_UNSIGNED (TREE_TYPE (t
)));
8050 inchash::add_expr (TREE_OPERAND (t
, 0), hstate
, flags
);
8053 else if (commutative_tree_code (code
))
8055 /* It's a commutative expression. We want to hash it the same
8056 however it appears. We do this by first hashing both operands
8057 and then rehashing based on the order of their independent
8059 inchash::hash one
, two
;
8060 inchash::add_expr (TREE_OPERAND (t
, 0), one
, flags
);
8061 inchash::add_expr (TREE_OPERAND (t
, 1), two
, flags
);
8062 hstate
.add_commutative (one
, two
);
8065 for (i
= TREE_OPERAND_LENGTH (t
) - 1; i
>= 0; --i
)
8066 inchash::add_expr (TREE_OPERAND (t
, i
), hstate
,
8067 i
== 0 ? flags
: sflags
);
8075 /* Constructors for pointer, array and function types.
8076 (RECORD_TYPE, UNION_TYPE and ENUMERAL_TYPE nodes are
8077 constructed by language-dependent code, not here.) */
8079 /* Construct, lay out and return the type of pointers to TO_TYPE with
8080 mode MODE. If CAN_ALIAS_ALL is TRUE, indicate this type can
8081 reference all of memory. If such a type has already been
8082 constructed, reuse it. */
8085 build_pointer_type_for_mode (tree to_type
, machine_mode mode
,
8089 bool could_alias
= can_alias_all
;
8091 if (to_type
== error_mark_node
)
8092 return error_mark_node
;
8094 /* If the pointed-to type has the may_alias attribute set, force
8095 a TYPE_REF_CAN_ALIAS_ALL pointer to be generated. */
8096 if (lookup_attribute ("may_alias", TYPE_ATTRIBUTES (to_type
)))
8097 can_alias_all
= true;
8099 /* In some cases, languages will have things that aren't a POINTER_TYPE
8100 (such as a RECORD_TYPE for fat pointers in Ada) as TYPE_POINTER_TO.
8101 In that case, return that type without regard to the rest of our
8104 ??? This is a kludge, but consistent with the way this function has
8105 always operated and there doesn't seem to be a good way to avoid this
8107 if (TYPE_POINTER_TO (to_type
) != 0
8108 && TREE_CODE (TYPE_POINTER_TO (to_type
)) != POINTER_TYPE
)
8109 return TYPE_POINTER_TO (to_type
);
8111 /* First, if we already have a type for pointers to TO_TYPE and it's
8112 the proper mode, use it. */
8113 for (t
= TYPE_POINTER_TO (to_type
); t
; t
= TYPE_NEXT_PTR_TO (t
))
8114 if (TYPE_MODE (t
) == mode
&& TYPE_REF_CAN_ALIAS_ALL (t
) == can_alias_all
)
8117 t
= make_node (POINTER_TYPE
);
8119 TREE_TYPE (t
) = to_type
;
8120 SET_TYPE_MODE (t
, mode
);
8121 TYPE_REF_CAN_ALIAS_ALL (t
) = can_alias_all
;
8122 TYPE_NEXT_PTR_TO (t
) = TYPE_POINTER_TO (to_type
);
8123 TYPE_POINTER_TO (to_type
) = t
;
8125 /* During LTO we do not set TYPE_CANONICAL of pointers and references. */
8126 if (TYPE_STRUCTURAL_EQUALITY_P (to_type
) || in_lto_p
)
8127 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8128 else if (TYPE_CANONICAL (to_type
) != to_type
|| could_alias
)
8130 = build_pointer_type_for_mode (TYPE_CANONICAL (to_type
),
8133 /* Lay out the type. This function has many callers that are concerned
8134 with expression-construction, and this simplifies them all. */
8140 /* By default build pointers in ptr_mode. */
8143 build_pointer_type (tree to_type
)
8145 addr_space_t as
= to_type
== error_mark_node
? ADDR_SPACE_GENERIC
8146 : TYPE_ADDR_SPACE (to_type
);
8147 machine_mode pointer_mode
= targetm
.addr_space
.pointer_mode (as
);
8148 return build_pointer_type_for_mode (to_type
, pointer_mode
, false);
8151 /* Same as build_pointer_type_for_mode, but for REFERENCE_TYPE. */
8154 build_reference_type_for_mode (tree to_type
, machine_mode mode
,
8158 bool could_alias
= can_alias_all
;
8160 if (to_type
== error_mark_node
)
8161 return error_mark_node
;
8163 /* If the pointed-to type has the may_alias attribute set, force
8164 a TYPE_REF_CAN_ALIAS_ALL pointer to be generated. */
8165 if (lookup_attribute ("may_alias", TYPE_ATTRIBUTES (to_type
)))
8166 can_alias_all
= true;
8168 /* In some cases, languages will have things that aren't a REFERENCE_TYPE
8169 (such as a RECORD_TYPE for fat pointers in Ada) as TYPE_REFERENCE_TO.
8170 In that case, return that type without regard to the rest of our
8173 ??? This is a kludge, but consistent with the way this function has
8174 always operated and there doesn't seem to be a good way to avoid this
8176 if (TYPE_REFERENCE_TO (to_type
) != 0
8177 && TREE_CODE (TYPE_REFERENCE_TO (to_type
)) != REFERENCE_TYPE
)
8178 return TYPE_REFERENCE_TO (to_type
);
8180 /* First, if we already have a type for pointers to TO_TYPE and it's
8181 the proper mode, use it. */
8182 for (t
= TYPE_REFERENCE_TO (to_type
); t
; t
= TYPE_NEXT_REF_TO (t
))
8183 if (TYPE_MODE (t
) == mode
&& TYPE_REF_CAN_ALIAS_ALL (t
) == can_alias_all
)
8186 t
= make_node (REFERENCE_TYPE
);
8188 TREE_TYPE (t
) = to_type
;
8189 SET_TYPE_MODE (t
, mode
);
8190 TYPE_REF_CAN_ALIAS_ALL (t
) = can_alias_all
;
8191 TYPE_NEXT_REF_TO (t
) = TYPE_REFERENCE_TO (to_type
);
8192 TYPE_REFERENCE_TO (to_type
) = t
;
8194 /* During LTO we do not set TYPE_CANONICAL of pointers and references. */
8195 if (TYPE_STRUCTURAL_EQUALITY_P (to_type
) || in_lto_p
)
8196 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8197 else if (TYPE_CANONICAL (to_type
) != to_type
|| could_alias
)
8199 = build_reference_type_for_mode (TYPE_CANONICAL (to_type
),
8208 /* Build the node for the type of references-to-TO_TYPE by default
8212 build_reference_type (tree to_type
)
8214 addr_space_t as
= to_type
== error_mark_node
? ADDR_SPACE_GENERIC
8215 : TYPE_ADDR_SPACE (to_type
);
8216 machine_mode pointer_mode
= targetm
.addr_space
.pointer_mode (as
);
8217 return build_reference_type_for_mode (to_type
, pointer_mode
, false);
8220 #define MAX_INT_CACHED_PREC \
8221 (HOST_BITS_PER_WIDE_INT > 64 ? HOST_BITS_PER_WIDE_INT : 64)
8222 static GTY(()) tree nonstandard_integer_type_cache
[2 * MAX_INT_CACHED_PREC
+ 2];
8224 /* Builds a signed or unsigned integer type of precision PRECISION.
8225 Used for C bitfields whose precision does not match that of
8226 built-in target types. */
8228 build_nonstandard_integer_type (unsigned HOST_WIDE_INT precision
,
8234 unsignedp
= MAX_INT_CACHED_PREC
+ 1;
8236 if (precision
<= MAX_INT_CACHED_PREC
)
8238 itype
= nonstandard_integer_type_cache
[precision
+ unsignedp
];
8243 itype
= make_node (INTEGER_TYPE
);
8244 TYPE_PRECISION (itype
) = precision
;
8247 fixup_unsigned_type (itype
);
8249 fixup_signed_type (itype
);
8252 if (tree_fits_uhwi_p (TYPE_MAX_VALUE (itype
)))
8253 ret
= type_hash_canon (tree_to_uhwi (TYPE_MAX_VALUE (itype
)), itype
);
8254 if (precision
<= MAX_INT_CACHED_PREC
)
8255 nonstandard_integer_type_cache
[precision
+ unsignedp
] = ret
;
8260 #define MAX_BOOL_CACHED_PREC \
8261 (HOST_BITS_PER_WIDE_INT > 64 ? HOST_BITS_PER_WIDE_INT : 64)
8262 static GTY(()) tree nonstandard_boolean_type_cache
[MAX_BOOL_CACHED_PREC
+ 1];
8264 /* Builds a boolean type of precision PRECISION.
8265 Used for boolean vectors to choose proper vector element size. */
8267 build_nonstandard_boolean_type (unsigned HOST_WIDE_INT precision
)
8271 if (precision
<= MAX_BOOL_CACHED_PREC
)
8273 type
= nonstandard_boolean_type_cache
[precision
];
8278 type
= make_node (BOOLEAN_TYPE
);
8279 TYPE_PRECISION (type
) = precision
;
8280 fixup_signed_type (type
);
8282 if (precision
<= MAX_INT_CACHED_PREC
)
8283 nonstandard_boolean_type_cache
[precision
] = type
;
8288 /* Create a range of some discrete type TYPE (an INTEGER_TYPE, ENUMERAL_TYPE
8289 or BOOLEAN_TYPE) with low bound LOWVAL and high bound HIGHVAL. If SHARED
8290 is true, reuse such a type that has already been constructed. */
8293 build_range_type_1 (tree type
, tree lowval
, tree highval
, bool shared
)
8295 tree itype
= make_node (INTEGER_TYPE
);
8297 TREE_TYPE (itype
) = type
;
8299 TYPE_MIN_VALUE (itype
) = fold_convert (type
, lowval
);
8300 TYPE_MAX_VALUE (itype
) = highval
? fold_convert (type
, highval
) : NULL
;
8302 TYPE_PRECISION (itype
) = TYPE_PRECISION (type
);
8303 SET_TYPE_MODE (itype
, TYPE_MODE (type
));
8304 TYPE_SIZE (itype
) = TYPE_SIZE (type
);
8305 TYPE_SIZE_UNIT (itype
) = TYPE_SIZE_UNIT (type
);
8306 SET_TYPE_ALIGN (itype
, TYPE_ALIGN (type
));
8307 TYPE_USER_ALIGN (itype
) = TYPE_USER_ALIGN (type
);
8312 if ((TYPE_MIN_VALUE (itype
)
8313 && TREE_CODE (TYPE_MIN_VALUE (itype
)) != INTEGER_CST
)
8314 || (TYPE_MAX_VALUE (itype
)
8315 && TREE_CODE (TYPE_MAX_VALUE (itype
)) != INTEGER_CST
))
8317 /* Since we cannot reliably merge this type, we need to compare it using
8318 structural equality checks. */
8319 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
8323 hashval_t hash
= type_hash_canon_hash (itype
);
8324 itype
= type_hash_canon (hash
, itype
);
8329 /* Wrapper around build_range_type_1 with SHARED set to true. */
8332 build_range_type (tree type
, tree lowval
, tree highval
)
8334 return build_range_type_1 (type
, lowval
, highval
, true);
8337 /* Wrapper around build_range_type_1 with SHARED set to false. */
8340 build_nonshared_range_type (tree type
, tree lowval
, tree highval
)
8342 return build_range_type_1 (type
, lowval
, highval
, false);
8345 /* Create a type of integers to be the TYPE_DOMAIN of an ARRAY_TYPE.
8346 MAXVAL should be the maximum value in the domain
8347 (one less than the length of the array).
8349 The maximum value that MAXVAL can have is INT_MAX for a HOST_WIDE_INT.
8350 We don't enforce this limit, that is up to caller (e.g. language front end).
8351 The limit exists because the result is a signed type and we don't handle
8352 sizes that use more than one HOST_WIDE_INT. */
8355 build_index_type (tree maxval
)
8357 return build_range_type (sizetype
, size_zero_node
, maxval
);
8360 /* Return true if the debug information for TYPE, a subtype, should be emitted
8361 as a subrange type. If so, set LOWVAL to the low bound and HIGHVAL to the
8362 high bound, respectively. Sometimes doing so unnecessarily obfuscates the
8363 debug info and doesn't reflect the source code. */
8366 subrange_type_for_debug_p (const_tree type
, tree
*lowval
, tree
*highval
)
8368 tree base_type
= TREE_TYPE (type
), low
, high
;
8370 /* Subrange types have a base type which is an integral type. */
8371 if (!INTEGRAL_TYPE_P (base_type
))
8374 /* Get the real bounds of the subtype. */
8375 if (lang_hooks
.types
.get_subrange_bounds
)
8376 lang_hooks
.types
.get_subrange_bounds (type
, &low
, &high
);
8379 low
= TYPE_MIN_VALUE (type
);
8380 high
= TYPE_MAX_VALUE (type
);
8383 /* If the type and its base type have the same representation and the same
8384 name, then the type is not a subrange but a copy of the base type. */
8385 if ((TREE_CODE (base_type
) == INTEGER_TYPE
8386 || TREE_CODE (base_type
) == BOOLEAN_TYPE
)
8387 && int_size_in_bytes (type
) == int_size_in_bytes (base_type
)
8388 && tree_int_cst_equal (low
, TYPE_MIN_VALUE (base_type
))
8389 && tree_int_cst_equal (high
, TYPE_MAX_VALUE (base_type
))
8390 && TYPE_IDENTIFIER (type
) == TYPE_IDENTIFIER (base_type
))
8400 /* Construct, lay out and return the type of arrays of elements with ELT_TYPE
8401 and number of elements specified by the range of values of INDEX_TYPE.
8402 If TYPELESS_STORAGE is true, TYPE_TYPELESS_STORAGE flag is set on the type.
8403 If SHARED is true, reuse such a type that has already been constructed. */
8406 build_array_type_1 (tree elt_type
, tree index_type
, bool typeless_storage
,
8411 if (TREE_CODE (elt_type
) == FUNCTION_TYPE
)
8413 error ("arrays of functions are not meaningful");
8414 elt_type
= integer_type_node
;
8417 t
= make_node (ARRAY_TYPE
);
8418 TREE_TYPE (t
) = elt_type
;
8419 TYPE_DOMAIN (t
) = index_type
;
8420 TYPE_ADDR_SPACE (t
) = TYPE_ADDR_SPACE (elt_type
);
8421 TYPE_TYPELESS_STORAGE (t
) = typeless_storage
;
8424 /* If the element type is incomplete at this point we get marked for
8425 structural equality. Do not record these types in the canonical
8427 if (TYPE_STRUCTURAL_EQUALITY_P (t
))
8432 hashval_t hash
= type_hash_canon_hash (t
);
8433 t
= type_hash_canon (hash
, t
);
8436 if (TYPE_CANONICAL (t
) == t
)
8438 if (TYPE_STRUCTURAL_EQUALITY_P (elt_type
)
8439 || (index_type
&& TYPE_STRUCTURAL_EQUALITY_P (index_type
))
8441 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8442 else if (TYPE_CANONICAL (elt_type
) != elt_type
8443 || (index_type
&& TYPE_CANONICAL (index_type
) != index_type
))
8445 = build_array_type_1 (TYPE_CANONICAL (elt_type
),
8447 ? TYPE_CANONICAL (index_type
) : NULL_TREE
,
8448 typeless_storage
, shared
);
8454 /* Wrapper around build_array_type_1 with SHARED set to true. */
8457 build_array_type (tree elt_type
, tree index_type
, bool typeless_storage
)
8459 return build_array_type_1 (elt_type
, index_type
, typeless_storage
, true);
8462 /* Wrapper around build_array_type_1 with SHARED set to false. */
8465 build_nonshared_array_type (tree elt_type
, tree index_type
)
8467 return build_array_type_1 (elt_type
, index_type
, false, false);
8470 /* Return a representation of ELT_TYPE[NELTS], using indices of type
8474 build_array_type_nelts (tree elt_type
, unsigned HOST_WIDE_INT nelts
)
8476 return build_array_type (elt_type
, build_index_type (size_int (nelts
- 1)));
8479 /* Recursively examines the array elements of TYPE, until a non-array
8480 element type is found. */
8483 strip_array_types (tree type
)
8485 while (TREE_CODE (type
) == ARRAY_TYPE
)
8486 type
= TREE_TYPE (type
);
8491 /* Computes the canonical argument types from the argument type list
8494 Upon return, *ANY_STRUCTURAL_P will be true iff either it was true
8495 on entry to this function, or if any of the ARGTYPES are
8498 Upon return, *ANY_NONCANONICAL_P will be true iff either it was
8499 true on entry to this function, or if any of the ARGTYPES are
8502 Returns a canonical argument list, which may be ARGTYPES when the
8503 canonical argument list is unneeded (i.e., *ANY_STRUCTURAL_P is
8504 true) or would not differ from ARGTYPES. */
8507 maybe_canonicalize_argtypes (tree argtypes
,
8508 bool *any_structural_p
,
8509 bool *any_noncanonical_p
)
8512 bool any_noncanonical_argtypes_p
= false;
8514 for (arg
= argtypes
; arg
&& !(*any_structural_p
); arg
= TREE_CHAIN (arg
))
8516 if (!TREE_VALUE (arg
) || TREE_VALUE (arg
) == error_mark_node
)
8517 /* Fail gracefully by stating that the type is structural. */
8518 *any_structural_p
= true;
8519 else if (TYPE_STRUCTURAL_EQUALITY_P (TREE_VALUE (arg
)))
8520 *any_structural_p
= true;
8521 else if (TYPE_CANONICAL (TREE_VALUE (arg
)) != TREE_VALUE (arg
)
8522 || TREE_PURPOSE (arg
))
8523 /* If the argument has a default argument, we consider it
8524 non-canonical even though the type itself is canonical.
8525 That way, different variants of function and method types
8526 with default arguments will all point to the variant with
8527 no defaults as their canonical type. */
8528 any_noncanonical_argtypes_p
= true;
8531 if (*any_structural_p
)
8534 if (any_noncanonical_argtypes_p
)
8536 /* Build the canonical list of argument types. */
8537 tree canon_argtypes
= NULL_TREE
;
8538 bool is_void
= false;
8540 for (arg
= argtypes
; arg
; arg
= TREE_CHAIN (arg
))
8542 if (arg
== void_list_node
)
8545 canon_argtypes
= tree_cons (NULL_TREE
,
8546 TYPE_CANONICAL (TREE_VALUE (arg
)),
8550 canon_argtypes
= nreverse (canon_argtypes
);
8552 canon_argtypes
= chainon (canon_argtypes
, void_list_node
);
8554 /* There is a non-canonical type. */
8555 *any_noncanonical_p
= true;
8556 return canon_argtypes
;
8559 /* The canonical argument types are the same as ARGTYPES. */
8563 /* Construct, lay out and return
8564 the type of functions returning type VALUE_TYPE
8565 given arguments of types ARG_TYPES.
8566 ARG_TYPES is a chain of TREE_LIST nodes whose TREE_VALUEs
8567 are data type nodes for the arguments of the function.
8568 If such a type has already been constructed, reuse it. */
8571 build_function_type (tree value_type
, tree arg_types
)
8574 inchash::hash hstate
;
8575 bool any_structural_p
, any_noncanonical_p
;
8576 tree canon_argtypes
;
8578 if (TREE_CODE (value_type
) == FUNCTION_TYPE
)
8580 error ("function return type cannot be function");
8581 value_type
= integer_type_node
;
8584 /* Make a node of the sort we want. */
8585 t
= make_node (FUNCTION_TYPE
);
8586 TREE_TYPE (t
) = value_type
;
8587 TYPE_ARG_TYPES (t
) = arg_types
;
8589 /* If we already have such a type, use the old one. */
8590 hashval_t hash
= type_hash_canon_hash (t
);
8591 t
= type_hash_canon (hash
, t
);
8593 /* Set up the canonical type. */
8594 any_structural_p
= TYPE_STRUCTURAL_EQUALITY_P (value_type
);
8595 any_noncanonical_p
= TYPE_CANONICAL (value_type
) != value_type
;
8596 canon_argtypes
= maybe_canonicalize_argtypes (arg_types
,
8598 &any_noncanonical_p
);
8599 if (any_structural_p
)
8600 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8601 else if (any_noncanonical_p
)
8602 TYPE_CANONICAL (t
) = build_function_type (TYPE_CANONICAL (value_type
),
8605 if (!COMPLETE_TYPE_P (t
))
8610 /* Build a function type. The RETURN_TYPE is the type returned by the
8611 function. If VAARGS is set, no void_type_node is appended to the
8612 list. ARGP must be always be terminated be a NULL_TREE. */
8615 build_function_type_list_1 (bool vaargs
, tree return_type
, va_list argp
)
8619 t
= va_arg (argp
, tree
);
8620 for (args
= NULL_TREE
; t
!= NULL_TREE
; t
= va_arg (argp
, tree
))
8621 args
= tree_cons (NULL_TREE
, t
, args
);
8626 if (args
!= NULL_TREE
)
8627 args
= nreverse (args
);
8628 gcc_assert (last
!= void_list_node
);
8630 else if (args
== NULL_TREE
)
8631 args
= void_list_node
;
8635 args
= nreverse (args
);
8636 TREE_CHAIN (last
) = void_list_node
;
8638 args
= build_function_type (return_type
, args
);
8643 /* Build a function type. The RETURN_TYPE is the type returned by the
8644 function. If additional arguments are provided, they are
8645 additional argument types. The list of argument types must always
8646 be terminated by NULL_TREE. */
8649 build_function_type_list (tree return_type
, ...)
8654 va_start (p
, return_type
);
8655 args
= build_function_type_list_1 (false, return_type
, p
);
8660 /* Build a variable argument function type. The RETURN_TYPE is the
8661 type returned by the function. If additional arguments are provided,
8662 they are additional argument types. The list of argument types must
8663 always be terminated by NULL_TREE. */
8666 build_varargs_function_type_list (tree return_type
, ...)
8671 va_start (p
, return_type
);
8672 args
= build_function_type_list_1 (true, return_type
, p
);
8678 /* Build a function type. RETURN_TYPE is the type returned by the
8679 function; VAARGS indicates whether the function takes varargs. The
8680 function takes N named arguments, the types of which are provided in
8684 build_function_type_array_1 (bool vaargs
, tree return_type
, int n
,
8688 tree t
= vaargs
? NULL_TREE
: void_list_node
;
8690 for (i
= n
- 1; i
>= 0; i
--)
8691 t
= tree_cons (NULL_TREE
, arg_types
[i
], t
);
8693 return build_function_type (return_type
, t
);
8696 /* Build a function type. RETURN_TYPE is the type returned by the
8697 function. The function takes N named arguments, the types of which
8698 are provided in ARG_TYPES. */
8701 build_function_type_array (tree return_type
, int n
, tree
*arg_types
)
8703 return build_function_type_array_1 (false, return_type
, n
, arg_types
);
8706 /* Build a variable argument function type. RETURN_TYPE is the type
8707 returned by the function. The function takes N named arguments, the
8708 types of which are provided in ARG_TYPES. */
8711 build_varargs_function_type_array (tree return_type
, int n
, tree
*arg_types
)
8713 return build_function_type_array_1 (true, return_type
, n
, arg_types
);
8716 /* Build a METHOD_TYPE for a member of BASETYPE. The RETTYPE (a TYPE)
8717 and ARGTYPES (a TREE_LIST) are the return type and arguments types
8718 for the method. An implicit additional parameter (of type
8719 pointer-to-BASETYPE) is added to the ARGTYPES. */
8722 build_method_type_directly (tree basetype
,
8728 bool any_structural_p
, any_noncanonical_p
;
8729 tree canon_argtypes
;
8731 /* Make a node of the sort we want. */
8732 t
= make_node (METHOD_TYPE
);
8734 TYPE_METHOD_BASETYPE (t
) = TYPE_MAIN_VARIANT (basetype
);
8735 TREE_TYPE (t
) = rettype
;
8736 ptype
= build_pointer_type (basetype
);
8738 /* The actual arglist for this function includes a "hidden" argument
8739 which is "this". Put it into the list of argument types. */
8740 argtypes
= tree_cons (NULL_TREE
, ptype
, argtypes
);
8741 TYPE_ARG_TYPES (t
) = argtypes
;
8743 /* If we already have such a type, use the old one. */
8744 hashval_t hash
= type_hash_canon_hash (t
);
8745 t
= type_hash_canon (hash
, t
);
8747 /* Set up the canonical type. */
8749 = (TYPE_STRUCTURAL_EQUALITY_P (basetype
)
8750 || TYPE_STRUCTURAL_EQUALITY_P (rettype
));
8752 = (TYPE_CANONICAL (basetype
) != basetype
8753 || TYPE_CANONICAL (rettype
) != rettype
);
8754 canon_argtypes
= maybe_canonicalize_argtypes (TREE_CHAIN (argtypes
),
8756 &any_noncanonical_p
);
8757 if (any_structural_p
)
8758 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8759 else if (any_noncanonical_p
)
8761 = build_method_type_directly (TYPE_CANONICAL (basetype
),
8762 TYPE_CANONICAL (rettype
),
8764 if (!COMPLETE_TYPE_P (t
))
8770 /* Construct, lay out and return the type of methods belonging to class
8771 BASETYPE and whose arguments and values are described by TYPE.
8772 If that type exists already, reuse it.
8773 TYPE must be a FUNCTION_TYPE node. */
8776 build_method_type (tree basetype
, tree type
)
8778 gcc_assert (TREE_CODE (type
) == FUNCTION_TYPE
);
8780 return build_method_type_directly (basetype
,
8782 TYPE_ARG_TYPES (type
));
8785 /* Construct, lay out and return the type of offsets to a value
8786 of type TYPE, within an object of type BASETYPE.
8787 If a suitable offset type exists already, reuse it. */
8790 build_offset_type (tree basetype
, tree type
)
8794 /* Make a node of the sort we want. */
8795 t
= make_node (OFFSET_TYPE
);
8797 TYPE_OFFSET_BASETYPE (t
) = TYPE_MAIN_VARIANT (basetype
);
8798 TREE_TYPE (t
) = type
;
8800 /* If we already have such a type, use the old one. */
8801 hashval_t hash
= type_hash_canon_hash (t
);
8802 t
= type_hash_canon (hash
, t
);
8804 if (!COMPLETE_TYPE_P (t
))
8807 if (TYPE_CANONICAL (t
) == t
)
8809 if (TYPE_STRUCTURAL_EQUALITY_P (basetype
)
8810 || TYPE_STRUCTURAL_EQUALITY_P (type
))
8811 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8812 else if (TYPE_CANONICAL (TYPE_MAIN_VARIANT (basetype
)) != basetype
8813 || TYPE_CANONICAL (type
) != type
)
8815 = build_offset_type (TYPE_CANONICAL (TYPE_MAIN_VARIANT (basetype
)),
8816 TYPE_CANONICAL (type
));
8822 /* Create a complex type whose components are COMPONENT_TYPE.
8824 If NAMED is true, the type is given a TYPE_NAME. We do not always
8825 do so because this creates a DECL node and thus make the DECL_UIDs
8826 dependent on the type canonicalization hashtable, which is GC-ed,
8827 so the DECL_UIDs would not be stable wrt garbage collection. */
8830 build_complex_type (tree component_type
, bool named
)
8834 gcc_assert (INTEGRAL_TYPE_P (component_type
)
8835 || SCALAR_FLOAT_TYPE_P (component_type
)
8836 || FIXED_POINT_TYPE_P (component_type
));
8838 /* Make a node of the sort we want. */
8839 t
= make_node (COMPLEX_TYPE
);
8841 TREE_TYPE (t
) = TYPE_MAIN_VARIANT (component_type
);
8843 /* If we already have such a type, use the old one. */
8844 hashval_t hash
= type_hash_canon_hash (t
);
8845 t
= type_hash_canon (hash
, t
);
8847 if (!COMPLETE_TYPE_P (t
))
8850 if (TYPE_CANONICAL (t
) == t
)
8852 if (TYPE_STRUCTURAL_EQUALITY_P (component_type
))
8853 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8854 else if (TYPE_CANONICAL (component_type
) != component_type
)
8856 = build_complex_type (TYPE_CANONICAL (component_type
), named
);
8859 /* We need to create a name, since complex is a fundamental type. */
8860 if (!TYPE_NAME (t
) && named
)
8863 if (component_type
== char_type_node
)
8864 name
= "complex char";
8865 else if (component_type
== signed_char_type_node
)
8866 name
= "complex signed char";
8867 else if (component_type
== unsigned_char_type_node
)
8868 name
= "complex unsigned char";
8869 else if (component_type
== short_integer_type_node
)
8870 name
= "complex short int";
8871 else if (component_type
== short_unsigned_type_node
)
8872 name
= "complex short unsigned int";
8873 else if (component_type
== integer_type_node
)
8874 name
= "complex int";
8875 else if (component_type
== unsigned_type_node
)
8876 name
= "complex unsigned int";
8877 else if (component_type
== long_integer_type_node
)
8878 name
= "complex long int";
8879 else if (component_type
== long_unsigned_type_node
)
8880 name
= "complex long unsigned int";
8881 else if (component_type
== long_long_integer_type_node
)
8882 name
= "complex long long int";
8883 else if (component_type
== long_long_unsigned_type_node
)
8884 name
= "complex long long unsigned int";
8889 TYPE_NAME (t
) = build_decl (UNKNOWN_LOCATION
, TYPE_DECL
,
8890 get_identifier (name
), t
);
8893 return build_qualified_type (t
, TYPE_QUALS (component_type
));
8896 /* If TYPE is a real or complex floating-point type and the target
8897 does not directly support arithmetic on TYPE then return the wider
8898 type to be used for arithmetic on TYPE. Otherwise, return
8902 excess_precision_type (tree type
)
8904 /* The target can give two different responses to the question of
8905 which excess precision mode it would like depending on whether we
8906 are in -fexcess-precision=standard or -fexcess-precision=fast. */
8908 enum excess_precision_type requested_type
8909 = (flag_excess_precision
== EXCESS_PRECISION_FAST
8910 ? EXCESS_PRECISION_TYPE_FAST
8911 : EXCESS_PRECISION_TYPE_STANDARD
);
8913 enum flt_eval_method target_flt_eval_method
8914 = targetm
.c
.excess_precision (requested_type
);
8916 /* The target should not ask for unpredictable float evaluation (though
8917 it might advertise that implicitly the evaluation is unpredictable,
8918 but we don't care about that here, it will have been reported
8919 elsewhere). If it does ask for unpredictable evaluation, we have
8920 nothing to do here. */
8921 gcc_assert (target_flt_eval_method
!= FLT_EVAL_METHOD_UNPREDICTABLE
);
8923 /* Nothing to do. The target has asked for all types we know about
8924 to be computed with their native precision and range. */
8925 if (target_flt_eval_method
== FLT_EVAL_METHOD_PROMOTE_TO_FLOAT16
)
8928 /* The target will promote this type in a target-dependent way, so excess
8929 precision ought to leave it alone. */
8930 if (targetm
.promoted_type (type
) != NULL_TREE
)
8933 machine_mode float16_type_mode
= (float16_type_node
8934 ? TYPE_MODE (float16_type_node
)
8936 machine_mode float_type_mode
= TYPE_MODE (float_type_node
);
8937 machine_mode double_type_mode
= TYPE_MODE (double_type_node
);
8939 switch (TREE_CODE (type
))
8943 machine_mode type_mode
= TYPE_MODE (type
);
8944 switch (target_flt_eval_method
)
8946 case FLT_EVAL_METHOD_PROMOTE_TO_FLOAT
:
8947 if (type_mode
== float16_type_mode
)
8948 return float_type_node
;
8950 case FLT_EVAL_METHOD_PROMOTE_TO_DOUBLE
:
8951 if (type_mode
== float16_type_mode
8952 || type_mode
== float_type_mode
)
8953 return double_type_node
;
8955 case FLT_EVAL_METHOD_PROMOTE_TO_LONG_DOUBLE
:
8956 if (type_mode
== float16_type_mode
8957 || type_mode
== float_type_mode
8958 || type_mode
== double_type_mode
)
8959 return long_double_type_node
;
8968 if (TREE_CODE (TREE_TYPE (type
)) != REAL_TYPE
)
8970 machine_mode type_mode
= TYPE_MODE (TREE_TYPE (type
));
8971 switch (target_flt_eval_method
)
8973 case FLT_EVAL_METHOD_PROMOTE_TO_FLOAT
:
8974 if (type_mode
== float16_type_mode
)
8975 return complex_float_type_node
;
8977 case FLT_EVAL_METHOD_PROMOTE_TO_DOUBLE
:
8978 if (type_mode
== float16_type_mode
8979 || type_mode
== float_type_mode
)
8980 return complex_double_type_node
;
8982 case FLT_EVAL_METHOD_PROMOTE_TO_LONG_DOUBLE
:
8983 if (type_mode
== float16_type_mode
8984 || type_mode
== float_type_mode
8985 || type_mode
== double_type_mode
)
8986 return complex_long_double_type_node
;
9000 /* Return OP, stripped of any conversions to wider types as much as is safe.
9001 Converting the value back to OP's type makes a value equivalent to OP.
9003 If FOR_TYPE is nonzero, we return a value which, if converted to
9004 type FOR_TYPE, would be equivalent to converting OP to type FOR_TYPE.
9006 OP must have integer, real or enumeral type. Pointers are not allowed!
9008 There are some cases where the obvious value we could return
9009 would regenerate to OP if converted to OP's type,
9010 but would not extend like OP to wider types.
9011 If FOR_TYPE indicates such extension is contemplated, we eschew such values.
9012 For example, if OP is (unsigned short)(signed char)-1,
9013 we avoid returning (signed char)-1 if FOR_TYPE is int,
9014 even though extending that to an unsigned short would regenerate OP,
9015 since the result of extending (signed char)-1 to (int)
9016 is different from (int) OP. */
9019 get_unwidened (tree op
, tree for_type
)
9021 /* Set UNS initially if converting OP to FOR_TYPE is a zero-extension. */
9022 tree type
= TREE_TYPE (op
);
9024 = TYPE_PRECISION (for_type
!= 0 ? for_type
: type
);
9026 = (for_type
!= 0 && for_type
!= type
9027 && final_prec
> TYPE_PRECISION (type
)
9028 && TYPE_UNSIGNED (type
));
9031 while (CONVERT_EXPR_P (op
))
9035 /* TYPE_PRECISION on vector types has different meaning
9036 (TYPE_VECTOR_SUBPARTS) and casts from vectors are view conversions,
9037 so avoid them here. */
9038 if (TREE_CODE (TREE_TYPE (TREE_OPERAND (op
, 0))) == VECTOR_TYPE
)
9041 bitschange
= TYPE_PRECISION (TREE_TYPE (op
))
9042 - TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (op
, 0)));
9044 /* Truncations are many-one so cannot be removed.
9045 Unless we are later going to truncate down even farther. */
9047 && final_prec
> TYPE_PRECISION (TREE_TYPE (op
)))
9050 /* See what's inside this conversion. If we decide to strip it,
9052 op
= TREE_OPERAND (op
, 0);
9054 /* If we have not stripped any zero-extensions (uns is 0),
9055 we can strip any kind of extension.
9056 If we have previously stripped a zero-extension,
9057 only zero-extensions can safely be stripped.
9058 Any extension can be stripped if the bits it would produce
9059 are all going to be discarded later by truncating to FOR_TYPE. */
9063 if (! uns
|| final_prec
<= TYPE_PRECISION (TREE_TYPE (op
)))
9065 /* TYPE_UNSIGNED says whether this is a zero-extension.
9066 Let's avoid computing it if it does not affect WIN
9067 and if UNS will not be needed again. */
9069 || CONVERT_EXPR_P (op
))
9070 && TYPE_UNSIGNED (TREE_TYPE (op
)))
9078 /* If we finally reach a constant see if it fits in sth smaller and
9079 in that case convert it. */
9080 if (TREE_CODE (win
) == INTEGER_CST
)
9082 tree wtype
= TREE_TYPE (win
);
9083 unsigned prec
= wi::min_precision (win
, TYPE_SIGN (wtype
));
9085 prec
= MAX (prec
, final_prec
);
9086 if (prec
< TYPE_PRECISION (wtype
))
9088 tree t
= lang_hooks
.types
.type_for_size (prec
, TYPE_UNSIGNED (wtype
));
9089 if (t
&& TYPE_PRECISION (t
) < TYPE_PRECISION (wtype
))
9090 win
= fold_convert (t
, win
);
9097 /* Return OP or a simpler expression for a narrower value
9098 which can be sign-extended or zero-extended to give back OP.
9099 Store in *UNSIGNEDP_PTR either 1 if the value should be zero-extended
9100 or 0 if the value should be sign-extended. */
9103 get_narrower (tree op
, int *unsignedp_ptr
)
9108 bool integral_p
= INTEGRAL_TYPE_P (TREE_TYPE (op
));
9110 while (TREE_CODE (op
) == NOP_EXPR
)
9113 = (TYPE_PRECISION (TREE_TYPE (op
))
9114 - TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (op
, 0))));
9116 /* Truncations are many-one so cannot be removed. */
9120 /* See what's inside this conversion. If we decide to strip it,
9125 op
= TREE_OPERAND (op
, 0);
9126 /* An extension: the outermost one can be stripped,
9127 but remember whether it is zero or sign extension. */
9129 uns
= TYPE_UNSIGNED (TREE_TYPE (op
));
9130 /* Otherwise, if a sign extension has been stripped,
9131 only sign extensions can now be stripped;
9132 if a zero extension has been stripped, only zero-extensions. */
9133 else if (uns
!= TYPE_UNSIGNED (TREE_TYPE (op
)))
9137 else /* bitschange == 0 */
9139 /* A change in nominal type can always be stripped, but we must
9140 preserve the unsignedness. */
9142 uns
= TYPE_UNSIGNED (TREE_TYPE (op
));
9144 op
= TREE_OPERAND (op
, 0);
9145 /* Keep trying to narrow, but don't assign op to win if it
9146 would turn an integral type into something else. */
9147 if (INTEGRAL_TYPE_P (TREE_TYPE (op
)) != integral_p
)
9154 if (TREE_CODE (op
) == COMPONENT_REF
9155 /* Since type_for_size always gives an integer type. */
9156 && TREE_CODE (TREE_TYPE (op
)) != REAL_TYPE
9157 && TREE_CODE (TREE_TYPE (op
)) != FIXED_POINT_TYPE
9158 /* Ensure field is laid out already. */
9159 && DECL_SIZE (TREE_OPERAND (op
, 1)) != 0
9160 && tree_fits_uhwi_p (DECL_SIZE (TREE_OPERAND (op
, 1))))
9162 unsigned HOST_WIDE_INT innerprec
9163 = tree_to_uhwi (DECL_SIZE (TREE_OPERAND (op
, 1)));
9164 int unsignedp
= (DECL_UNSIGNED (TREE_OPERAND (op
, 1))
9165 || TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (op
, 1))));
9166 tree type
= lang_hooks
.types
.type_for_size (innerprec
, unsignedp
);
9168 /* We can get this structure field in a narrower type that fits it,
9169 but the resulting extension to its nominal type (a fullword type)
9170 must satisfy the same conditions as for other extensions.
9172 Do this only for fields that are aligned (not bit-fields),
9173 because when bit-field insns will be used there is no
9174 advantage in doing this. */
9176 if (innerprec
< TYPE_PRECISION (TREE_TYPE (op
))
9177 && ! DECL_BIT_FIELD (TREE_OPERAND (op
, 1))
9178 && (first
|| uns
== DECL_UNSIGNED (TREE_OPERAND (op
, 1)))
9182 uns
= DECL_UNSIGNED (TREE_OPERAND (op
, 1));
9183 win
= fold_convert (type
, op
);
9187 *unsignedp_ptr
= uns
;
9191 /* Return true if integer constant C has a value that is permissible
9192 for TYPE, an integral type. */
9195 int_fits_type_p (const_tree c
, const_tree type
)
9197 tree type_low_bound
, type_high_bound
;
9198 bool ok_for_low_bound
, ok_for_high_bound
;
9199 signop sgn_c
= TYPE_SIGN (TREE_TYPE (c
));
9201 /* Non-standard boolean types can have arbitrary precision but various
9202 transformations assume that they can only take values 0 and +/-1. */
9203 if (TREE_CODE (type
) == BOOLEAN_TYPE
)
9204 return wi::fits_to_boolean_p (c
, type
);
9207 type_low_bound
= TYPE_MIN_VALUE (type
);
9208 type_high_bound
= TYPE_MAX_VALUE (type
);
9210 /* If at least one bound of the type is a constant integer, we can check
9211 ourselves and maybe make a decision. If no such decision is possible, but
9212 this type is a subtype, try checking against that. Otherwise, use
9213 fits_to_tree_p, which checks against the precision.
9215 Compute the status for each possibly constant bound, and return if we see
9216 one does not match. Use ok_for_xxx_bound for this purpose, assigning -1
9217 for "unknown if constant fits", 0 for "constant known *not* to fit" and 1
9218 for "constant known to fit". */
9220 /* Check if c >= type_low_bound. */
9221 if (type_low_bound
&& TREE_CODE (type_low_bound
) == INTEGER_CST
)
9223 if (tree_int_cst_lt (c
, type_low_bound
))
9225 ok_for_low_bound
= true;
9228 ok_for_low_bound
= false;
9230 /* Check if c <= type_high_bound. */
9231 if (type_high_bound
&& TREE_CODE (type_high_bound
) == INTEGER_CST
)
9233 if (tree_int_cst_lt (type_high_bound
, c
))
9235 ok_for_high_bound
= true;
9238 ok_for_high_bound
= false;
9240 /* If the constant fits both bounds, the result is known. */
9241 if (ok_for_low_bound
&& ok_for_high_bound
)
9244 /* Perform some generic filtering which may allow making a decision
9245 even if the bounds are not constant. First, negative integers
9246 never fit in unsigned types, */
9247 if (TYPE_UNSIGNED (type
) && sgn_c
== SIGNED
&& wi::neg_p (c
))
9250 /* Second, narrower types always fit in wider ones. */
9251 if (TYPE_PRECISION (type
) > TYPE_PRECISION (TREE_TYPE (c
)))
9254 /* Third, unsigned integers with top bit set never fit signed types. */
9255 if (!TYPE_UNSIGNED (type
) && sgn_c
== UNSIGNED
)
9257 int prec
= GET_MODE_PRECISION (TYPE_MODE (TREE_TYPE (c
))) - 1;
9258 if (prec
< TYPE_PRECISION (TREE_TYPE (c
)))
9260 /* When a tree_cst is converted to a wide-int, the precision
9261 is taken from the type. However, if the precision of the
9262 mode underneath the type is smaller than that, it is
9263 possible that the value will not fit. The test below
9264 fails if any bit is set between the sign bit of the
9265 underlying mode and the top bit of the type. */
9266 if (wi::ne_p (wi::zext (c
, prec
- 1), c
))
9269 else if (wi::neg_p (c
))
9273 /* If we haven't been able to decide at this point, there nothing more we
9274 can check ourselves here. Look at the base type if we have one and it
9275 has the same precision. */
9276 if (TREE_CODE (type
) == INTEGER_TYPE
9277 && TREE_TYPE (type
) != 0
9278 && TYPE_PRECISION (type
) == TYPE_PRECISION (TREE_TYPE (type
)))
9280 type
= TREE_TYPE (type
);
9284 /* Or to fits_to_tree_p, if nothing else. */
9285 return wi::fits_to_tree_p (c
, type
);
9288 /* Stores bounds of an integer TYPE in MIN and MAX. If TYPE has non-constant
9289 bounds or is a POINTER_TYPE, the maximum and/or minimum values that can be
9290 represented (assuming two's-complement arithmetic) within the bit
9291 precision of the type are returned instead. */
9294 get_type_static_bounds (const_tree type
, mpz_t min
, mpz_t max
)
9296 if (!POINTER_TYPE_P (type
) && TYPE_MIN_VALUE (type
)
9297 && TREE_CODE (TYPE_MIN_VALUE (type
)) == INTEGER_CST
)
9298 wi::to_mpz (TYPE_MIN_VALUE (type
), min
, TYPE_SIGN (type
));
9301 if (TYPE_UNSIGNED (type
))
9302 mpz_set_ui (min
, 0);
9305 wide_int mn
= wi::min_value (TYPE_PRECISION (type
), SIGNED
);
9306 wi::to_mpz (mn
, min
, SIGNED
);
9310 if (!POINTER_TYPE_P (type
) && TYPE_MAX_VALUE (type
)
9311 && TREE_CODE (TYPE_MAX_VALUE (type
)) == INTEGER_CST
)
9312 wi::to_mpz (TYPE_MAX_VALUE (type
), max
, TYPE_SIGN (type
));
9315 wide_int mn
= wi::max_value (TYPE_PRECISION (type
), TYPE_SIGN (type
));
9316 wi::to_mpz (mn
, max
, TYPE_SIGN (type
));
9320 /* Return true if VAR is an automatic variable defined in function FN. */
9323 auto_var_in_fn_p (const_tree var
, const_tree fn
)
9325 return (DECL_P (var
) && DECL_CONTEXT (var
) == fn
9326 && ((((VAR_P (var
) && ! DECL_EXTERNAL (var
))
9327 || TREE_CODE (var
) == PARM_DECL
)
9328 && ! TREE_STATIC (var
))
9329 || TREE_CODE (var
) == LABEL_DECL
9330 || TREE_CODE (var
) == RESULT_DECL
));
9333 /* Subprogram of following function. Called by walk_tree.
9335 Return *TP if it is an automatic variable or parameter of the
9336 function passed in as DATA. */
9339 find_var_from_fn (tree
*tp
, int *walk_subtrees
, void *data
)
9341 tree fn
= (tree
) data
;
9346 else if (DECL_P (*tp
)
9347 && auto_var_in_fn_p (*tp
, fn
))
9353 /* Returns true if T is, contains, or refers to a type with variable
9354 size. For METHOD_TYPEs and FUNCTION_TYPEs we exclude the
9355 arguments, but not the return type. If FN is nonzero, only return
9356 true if a modifier of the type or position of FN is a variable or
9357 parameter inside FN.
9359 This concept is more general than that of C99 'variably modified types':
9360 in C99, a struct type is never variably modified because a VLA may not
9361 appear as a structure member. However, in GNU C code like:
9363 struct S { int i[f()]; };
9365 is valid, and other languages may define similar constructs. */
9368 variably_modified_type_p (tree type
, tree fn
)
9372 /* Test if T is either variable (if FN is zero) or an expression containing
9373 a variable in FN. If TYPE isn't gimplified, return true also if
9374 gimplify_one_sizepos would gimplify the expression into a local
9376 #define RETURN_TRUE_IF_VAR(T) \
9377 do { tree _t = (T); \
9378 if (_t != NULL_TREE \
9379 && _t != error_mark_node \
9380 && TREE_CODE (_t) != INTEGER_CST \
9381 && TREE_CODE (_t) != PLACEHOLDER_EXPR \
9383 || (!TYPE_SIZES_GIMPLIFIED (type) \
9384 && !is_gimple_sizepos (_t)) \
9385 || walk_tree (&_t, find_var_from_fn, fn, NULL))) \
9386 return true; } while (0)
9388 if (type
== error_mark_node
)
9391 /* If TYPE itself has variable size, it is variably modified. */
9392 RETURN_TRUE_IF_VAR (TYPE_SIZE (type
));
9393 RETURN_TRUE_IF_VAR (TYPE_SIZE_UNIT (type
));
9395 switch (TREE_CODE (type
))
9398 case REFERENCE_TYPE
:
9400 if (variably_modified_type_p (TREE_TYPE (type
), fn
))
9406 /* If TYPE is a function type, it is variably modified if the
9407 return type is variably modified. */
9408 if (variably_modified_type_p (TREE_TYPE (type
), fn
))
9414 case FIXED_POINT_TYPE
:
9417 /* Scalar types are variably modified if their end points
9419 RETURN_TRUE_IF_VAR (TYPE_MIN_VALUE (type
));
9420 RETURN_TRUE_IF_VAR (TYPE_MAX_VALUE (type
));
9425 case QUAL_UNION_TYPE
:
9426 /* We can't see if any of the fields are variably-modified by the
9427 definition we normally use, since that would produce infinite
9428 recursion via pointers. */
9429 /* This is variably modified if some field's type is. */
9430 for (t
= TYPE_FIELDS (type
); t
; t
= DECL_CHAIN (t
))
9431 if (TREE_CODE (t
) == FIELD_DECL
)
9433 RETURN_TRUE_IF_VAR (DECL_FIELD_OFFSET (t
));
9434 RETURN_TRUE_IF_VAR (DECL_SIZE (t
));
9435 RETURN_TRUE_IF_VAR (DECL_SIZE_UNIT (t
));
9437 if (TREE_CODE (type
) == QUAL_UNION_TYPE
)
9438 RETURN_TRUE_IF_VAR (DECL_QUALIFIER (t
));
9443 /* Do not call ourselves to avoid infinite recursion. This is
9444 variably modified if the element type is. */
9445 RETURN_TRUE_IF_VAR (TYPE_SIZE (TREE_TYPE (type
)));
9446 RETURN_TRUE_IF_VAR (TYPE_SIZE_UNIT (TREE_TYPE (type
)));
9453 /* The current language may have other cases to check, but in general,
9454 all other types are not variably modified. */
9455 return lang_hooks
.tree_inlining
.var_mod_type_p (type
, fn
);
9457 #undef RETURN_TRUE_IF_VAR
9460 /* Given a DECL or TYPE, return the scope in which it was declared, or
9461 NULL_TREE if there is no containing scope. */
9464 get_containing_scope (const_tree t
)
9466 return (TYPE_P (t
) ? TYPE_CONTEXT (t
) : DECL_CONTEXT (t
));
9469 /* Return the innermost context enclosing DECL that is
9470 a FUNCTION_DECL, or zero if none. */
9473 decl_function_context (const_tree decl
)
9477 if (TREE_CODE (decl
) == ERROR_MARK
)
9480 /* C++ virtual functions use DECL_CONTEXT for the class of the vtable
9481 where we look up the function at runtime. Such functions always take
9482 a first argument of type 'pointer to real context'.
9484 C++ should really be fixed to use DECL_CONTEXT for the real context,
9485 and use something else for the "virtual context". */
9486 else if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_VINDEX (decl
))
9489 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl
)))));
9491 context
= DECL_CONTEXT (decl
);
9493 while (context
&& TREE_CODE (context
) != FUNCTION_DECL
)
9495 if (TREE_CODE (context
) == BLOCK
)
9496 context
= BLOCK_SUPERCONTEXT (context
);
9498 context
= get_containing_scope (context
);
9504 /* Return the innermost context enclosing DECL that is
9505 a RECORD_TYPE, UNION_TYPE or QUAL_UNION_TYPE, or zero if none.
9506 TYPE_DECLs and FUNCTION_DECLs are transparent to this function. */
9509 decl_type_context (const_tree decl
)
9511 tree context
= DECL_CONTEXT (decl
);
9514 switch (TREE_CODE (context
))
9516 case NAMESPACE_DECL
:
9517 case TRANSLATION_UNIT_DECL
:
9522 case QUAL_UNION_TYPE
:
9527 context
= DECL_CONTEXT (context
);
9531 context
= BLOCK_SUPERCONTEXT (context
);
9541 /* CALL is a CALL_EXPR. Return the declaration for the function
9542 called, or NULL_TREE if the called function cannot be
9546 get_callee_fndecl (const_tree call
)
9550 if (call
== error_mark_node
)
9551 return error_mark_node
;
9553 /* It's invalid to call this function with anything but a
9555 gcc_assert (TREE_CODE (call
) == CALL_EXPR
);
9557 /* The first operand to the CALL is the address of the function
9559 addr
= CALL_EXPR_FN (call
);
9561 /* If there is no function, return early. */
9562 if (addr
== NULL_TREE
)
9567 /* If this is a readonly function pointer, extract its initial value. */
9568 if (DECL_P (addr
) && TREE_CODE (addr
) != FUNCTION_DECL
9569 && TREE_READONLY (addr
) && ! TREE_THIS_VOLATILE (addr
)
9570 && DECL_INITIAL (addr
))
9571 addr
= DECL_INITIAL (addr
);
9573 /* If the address is just `&f' for some function `f', then we know
9574 that `f' is being called. */
9575 if (TREE_CODE (addr
) == ADDR_EXPR
9576 && TREE_CODE (TREE_OPERAND (addr
, 0)) == FUNCTION_DECL
)
9577 return TREE_OPERAND (addr
, 0);
9579 /* We couldn't figure out what was being called. */
9583 /* If CALL_EXPR CALL calls a normal built-in function or an internal function,
9584 return the associated function code, otherwise return CFN_LAST. */
9587 get_call_combined_fn (const_tree call
)
9589 /* It's invalid to call this function with anything but a CALL_EXPR. */
9590 gcc_assert (TREE_CODE (call
) == CALL_EXPR
);
9592 if (!CALL_EXPR_FN (call
))
9593 return as_combined_fn (CALL_EXPR_IFN (call
));
9595 tree fndecl
= get_callee_fndecl (call
);
9596 if (fndecl
&& DECL_BUILT_IN_CLASS (fndecl
) == BUILT_IN_NORMAL
)
9597 return as_combined_fn (DECL_FUNCTION_CODE (fndecl
));
9602 #define TREE_MEM_USAGE_SPACES 40
9604 /* Print debugging information about tree nodes generated during the compile,
9605 and any language-specific information. */
9608 dump_tree_statistics (void)
9610 if (GATHER_STATISTICS
)
9613 int total_nodes
, total_bytes
;
9614 fprintf (stderr
, "\nKind Nodes Bytes\n");
9615 mem_usage::print_dash_line (TREE_MEM_USAGE_SPACES
);
9616 total_nodes
= total_bytes
= 0;
9617 for (i
= 0; i
< (int) all_kinds
; i
++)
9619 fprintf (stderr
, "%-20s %7d %10d\n", tree_node_kind_names
[i
],
9620 tree_node_counts
[i
], tree_node_sizes
[i
]);
9621 total_nodes
+= tree_node_counts
[i
];
9622 total_bytes
+= tree_node_sizes
[i
];
9624 mem_usage::print_dash_line (TREE_MEM_USAGE_SPACES
);
9625 fprintf (stderr
, "%-20s %7d %10d\n", "Total", total_nodes
, total_bytes
);
9626 mem_usage::print_dash_line (TREE_MEM_USAGE_SPACES
);
9627 fprintf (stderr
, "Code Nodes\n");
9628 mem_usage::print_dash_line (TREE_MEM_USAGE_SPACES
);
9629 for (i
= 0; i
< (int) MAX_TREE_CODES
; i
++)
9630 fprintf (stderr
, "%-32s %7d\n", get_tree_code_name ((enum tree_code
) i
),
9631 tree_code_counts
[i
]);
9632 mem_usage::print_dash_line (TREE_MEM_USAGE_SPACES
);
9633 fprintf (stderr
, "\n");
9634 ssanames_print_statistics ();
9635 fprintf (stderr
, "\n");
9636 phinodes_print_statistics ();
9637 fprintf (stderr
, "\n");
9640 fprintf (stderr
, "(No per-node statistics)\n");
9642 print_type_hash_statistics ();
9643 print_debug_expr_statistics ();
9644 print_value_expr_statistics ();
9645 lang_hooks
.print_statistics ();
9648 #define FILE_FUNCTION_FORMAT "_GLOBAL__%s_%s"
9650 /* Generate a crc32 of the low BYTES bytes of VALUE. */
9653 crc32_unsigned_n (unsigned chksum
, unsigned value
, unsigned bytes
)
9655 /* This relies on the raw feedback's top 4 bits being zero. */
9656 #define FEEDBACK(X) ((X) * 0x04c11db7)
9657 #define SYNDROME(X) (FEEDBACK ((X) & 1) ^ FEEDBACK ((X) & 2) \
9658 ^ FEEDBACK ((X) & 4) ^ FEEDBACK ((X) & 8))
9659 static const unsigned syndromes
[16] =
9661 SYNDROME(0x0), SYNDROME(0x1), SYNDROME(0x2), SYNDROME(0x3),
9662 SYNDROME(0x4), SYNDROME(0x5), SYNDROME(0x6), SYNDROME(0x7),
9663 SYNDROME(0x8), SYNDROME(0x9), SYNDROME(0xa), SYNDROME(0xb),
9664 SYNDROME(0xc), SYNDROME(0xd), SYNDROME(0xe), SYNDROME(0xf),
9669 value
<<= (32 - bytes
* 8);
9670 for (unsigned ix
= bytes
* 2; ix
--; value
<<= 4)
9672 unsigned feedback
= syndromes
[((value
^ chksum
) >> 28) & 0xf];
9674 chksum
= (chksum
<< 4) ^ feedback
;
9680 /* Generate a crc32 of a string. */
9683 crc32_string (unsigned chksum
, const char *string
)
9686 chksum
= crc32_byte (chksum
, *string
);
9691 /* P is a string that will be used in a symbol. Mask out any characters
9692 that are not valid in that context. */
9695 clean_symbol_name (char *p
)
9699 #ifndef NO_DOLLAR_IN_LABEL /* this for `$'; unlikely, but... -- kr */
9702 #ifndef NO_DOT_IN_LABEL /* this for `.'; unlikely, but... */
9709 /* For anonymous aggregate types, we need some sort of name to
9710 hold on to. In practice, this should not appear, but it should
9711 not be harmful if it does. */
9713 anon_aggrname_p(const_tree id_node
)
9715 #ifndef NO_DOT_IN_LABEL
9716 return (IDENTIFIER_POINTER (id_node
)[0] == '.'
9717 && IDENTIFIER_POINTER (id_node
)[1] == '_');
9718 #else /* NO_DOT_IN_LABEL */
9719 #ifndef NO_DOLLAR_IN_LABEL
9720 return (IDENTIFIER_POINTER (id_node
)[0] == '$' \
9721 && IDENTIFIER_POINTER (id_node
)[1] == '_');
9722 #else /* NO_DOLLAR_IN_LABEL */
9723 #define ANON_AGGRNAME_PREFIX "__anon_"
9724 return (!strncmp (IDENTIFIER_POINTER (id_node
), ANON_AGGRNAME_PREFIX
,
9725 sizeof (ANON_AGGRNAME_PREFIX
) - 1));
9726 #endif /* NO_DOLLAR_IN_LABEL */
9727 #endif /* NO_DOT_IN_LABEL */
9730 /* Return a format for an anonymous aggregate name. */
9732 anon_aggrname_format()
9734 #ifndef NO_DOT_IN_LABEL
9736 #else /* NO_DOT_IN_LABEL */
9737 #ifndef NO_DOLLAR_IN_LABEL
9739 #else /* NO_DOLLAR_IN_LABEL */
9741 #endif /* NO_DOLLAR_IN_LABEL */
9742 #endif /* NO_DOT_IN_LABEL */
9745 /* Generate a name for a special-purpose function.
9746 The generated name may need to be unique across the whole link.
9747 Changes to this function may also require corresponding changes to
9748 xstrdup_mask_random.
9749 TYPE is some string to identify the purpose of this function to the
9750 linker or collect2; it must start with an uppercase letter,
9752 I - for constructors
9754 N - for C++ anonymous namespaces
9755 F - for DWARF unwind frame information. */
9758 get_file_function_name (const char *type
)
9764 /* If we already have a name we know to be unique, just use that. */
9765 if (first_global_object_name
)
9766 p
= q
= ASTRDUP (first_global_object_name
);
9767 /* If the target is handling the constructors/destructors, they
9768 will be local to this file and the name is only necessary for
9770 We also assign sub_I and sub_D sufixes to constructors called from
9771 the global static constructors. These are always local. */
9772 else if (((type
[0] == 'I' || type
[0] == 'D') && targetm
.have_ctors_dtors
)
9773 || (strncmp (type
, "sub_", 4) == 0
9774 && (type
[4] == 'I' || type
[4] == 'D')))
9776 const char *file
= main_input_filename
;
9778 file
= LOCATION_FILE (input_location
);
9779 /* Just use the file's basename, because the full pathname
9780 might be quite long. */
9781 p
= q
= ASTRDUP (lbasename (file
));
9785 /* Otherwise, the name must be unique across the entire link.
9786 We don't have anything that we know to be unique to this translation
9787 unit, so use what we do have and throw in some randomness. */
9789 const char *name
= weak_global_object_name
;
9790 const char *file
= main_input_filename
;
9795 file
= LOCATION_FILE (input_location
);
9797 len
= strlen (file
);
9798 q
= (char *) alloca (9 + 19 + len
+ 1);
9799 memcpy (q
, file
, len
+ 1);
9801 snprintf (q
+ len
, 9 + 19 + 1, "_%08X_" HOST_WIDE_INT_PRINT_HEX
,
9802 crc32_string (0, name
), get_random_seed (false));
9807 clean_symbol_name (q
);
9808 buf
= (char *) alloca (sizeof (FILE_FUNCTION_FORMAT
) + strlen (p
)
9811 /* Set up the name of the file-level functions we may need.
9812 Use a global object (which is already required to be unique over
9813 the program) rather than the file name (which imposes extra
9815 sprintf (buf
, FILE_FUNCTION_FORMAT
, type
, p
);
9817 return get_identifier (buf
);
9820 #if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007)
9822 /* Complain that the tree code of NODE does not match the expected 0
9823 terminated list of trailing codes. The trailing code list can be
9824 empty, for a more vague error message. FILE, LINE, and FUNCTION
9825 are of the caller. */
9828 tree_check_failed (const_tree node
, const char *file
,
9829 int line
, const char *function
, ...)
9833 unsigned length
= 0;
9834 enum tree_code code
;
9836 va_start (args
, function
);
9837 while ((code
= (enum tree_code
) va_arg (args
, int)))
9838 length
+= 4 + strlen (get_tree_code_name (code
));
9843 va_start (args
, function
);
9844 length
+= strlen ("expected ");
9845 buffer
= tmp
= (char *) alloca (length
);
9847 while ((code
= (enum tree_code
) va_arg (args
, int)))
9849 const char *prefix
= length
? " or " : "expected ";
9851 strcpy (tmp
+ length
, prefix
);
9852 length
+= strlen (prefix
);
9853 strcpy (tmp
+ length
, get_tree_code_name (code
));
9854 length
+= strlen (get_tree_code_name (code
));
9859 buffer
= "unexpected node";
9861 internal_error ("tree check: %s, have %s in %s, at %s:%d",
9862 buffer
, get_tree_code_name (TREE_CODE (node
)),
9863 function
, trim_filename (file
), line
);
9866 /* Complain that the tree code of NODE does match the expected 0
9867 terminated list of trailing codes. FILE, LINE, and FUNCTION are of
9871 tree_not_check_failed (const_tree node
, const char *file
,
9872 int line
, const char *function
, ...)
9876 unsigned length
= 0;
9877 enum tree_code code
;
9879 va_start (args
, function
);
9880 while ((code
= (enum tree_code
) va_arg (args
, int)))
9881 length
+= 4 + strlen (get_tree_code_name (code
));
9883 va_start (args
, function
);
9884 buffer
= (char *) alloca (length
);
9886 while ((code
= (enum tree_code
) va_arg (args
, int)))
9890 strcpy (buffer
+ length
, " or ");
9893 strcpy (buffer
+ length
, get_tree_code_name (code
));
9894 length
+= strlen (get_tree_code_name (code
));
9898 internal_error ("tree check: expected none of %s, have %s in %s, at %s:%d",
9899 buffer
, get_tree_code_name (TREE_CODE (node
)),
9900 function
, trim_filename (file
), line
);
9903 /* Similar to tree_check_failed, except that we check for a class of tree
9904 code, given in CL. */
9907 tree_class_check_failed (const_tree node
, const enum tree_code_class cl
,
9908 const char *file
, int line
, const char *function
)
9911 ("tree check: expected class %qs, have %qs (%s) in %s, at %s:%d",
9912 TREE_CODE_CLASS_STRING (cl
),
9913 TREE_CODE_CLASS_STRING (TREE_CODE_CLASS (TREE_CODE (node
))),
9914 get_tree_code_name (TREE_CODE (node
)), function
, trim_filename (file
), line
);
9917 /* Similar to tree_check_failed, except that instead of specifying a
9918 dozen codes, use the knowledge that they're all sequential. */
9921 tree_range_check_failed (const_tree node
, const char *file
, int line
,
9922 const char *function
, enum tree_code c1
,
9926 unsigned length
= 0;
9929 for (c
= c1
; c
<= c2
; ++c
)
9930 length
+= 4 + strlen (get_tree_code_name ((enum tree_code
) c
));
9932 length
+= strlen ("expected ");
9933 buffer
= (char *) alloca (length
);
9936 for (c
= c1
; c
<= c2
; ++c
)
9938 const char *prefix
= length
? " or " : "expected ";
9940 strcpy (buffer
+ length
, prefix
);
9941 length
+= strlen (prefix
);
9942 strcpy (buffer
+ length
, get_tree_code_name ((enum tree_code
) c
));
9943 length
+= strlen (get_tree_code_name ((enum tree_code
) c
));
9946 internal_error ("tree check: %s, have %s in %s, at %s:%d",
9947 buffer
, get_tree_code_name (TREE_CODE (node
)),
9948 function
, trim_filename (file
), line
);
9952 /* Similar to tree_check_failed, except that we check that a tree does
9953 not have the specified code, given in CL. */
9956 tree_not_class_check_failed (const_tree node
, const enum tree_code_class cl
,
9957 const char *file
, int line
, const char *function
)
9960 ("tree check: did not expect class %qs, have %qs (%s) in %s, at %s:%d",
9961 TREE_CODE_CLASS_STRING (cl
),
9962 TREE_CODE_CLASS_STRING (TREE_CODE_CLASS (TREE_CODE (node
))),
9963 get_tree_code_name (TREE_CODE (node
)), function
, trim_filename (file
), line
);
9967 /* Similar to tree_check_failed but applied to OMP_CLAUSE codes. */
9970 omp_clause_check_failed (const_tree node
, const char *file
, int line
,
9971 const char *function
, enum omp_clause_code code
)
9973 internal_error ("tree check: expected omp_clause %s, have %s in %s, at %s:%d",
9974 omp_clause_code_name
[code
], get_tree_code_name (TREE_CODE (node
)),
9975 function
, trim_filename (file
), line
);
9979 /* Similar to tree_range_check_failed but applied to OMP_CLAUSE codes. */
9982 omp_clause_range_check_failed (const_tree node
, const char *file
, int line
,
9983 const char *function
, enum omp_clause_code c1
,
9984 enum omp_clause_code c2
)
9987 unsigned length
= 0;
9990 for (c
= c1
; c
<= c2
; ++c
)
9991 length
+= 4 + strlen (omp_clause_code_name
[c
]);
9993 length
+= strlen ("expected ");
9994 buffer
= (char *) alloca (length
);
9997 for (c
= c1
; c
<= c2
; ++c
)
9999 const char *prefix
= length
? " or " : "expected ";
10001 strcpy (buffer
+ length
, prefix
);
10002 length
+= strlen (prefix
);
10003 strcpy (buffer
+ length
, omp_clause_code_name
[c
]);
10004 length
+= strlen (omp_clause_code_name
[c
]);
10007 internal_error ("tree check: %s, have %s in %s, at %s:%d",
10008 buffer
, omp_clause_code_name
[TREE_CODE (node
)],
10009 function
, trim_filename (file
), line
);
10013 #undef DEFTREESTRUCT
10014 #define DEFTREESTRUCT(VAL, NAME) NAME,
10016 static const char *ts_enum_names
[] = {
10017 #include "treestruct.def"
10019 #undef DEFTREESTRUCT
10021 #define TS_ENUM_NAME(EN) (ts_enum_names[(EN)])
10023 /* Similar to tree_class_check_failed, except that we check for
10024 whether CODE contains the tree structure identified by EN. */
10027 tree_contains_struct_check_failed (const_tree node
,
10028 const enum tree_node_structure_enum en
,
10029 const char *file
, int line
,
10030 const char *function
)
10033 ("tree check: expected tree that contains %qs structure, have %qs in %s, at %s:%d",
10035 get_tree_code_name (TREE_CODE (node
)), function
, trim_filename (file
), line
);
10039 /* Similar to above, except that the check is for the bounds of a TREE_VEC's
10040 (dynamically sized) vector. */
10043 tree_int_cst_elt_check_failed (int idx
, int len
, const char *file
, int line
,
10044 const char *function
)
10047 ("tree check: accessed elt %d of tree_int_cst with %d elts in %s, at %s:%d",
10048 idx
+ 1, len
, function
, trim_filename (file
), line
);
10051 /* Similar to above, except that the check is for the bounds of a TREE_VEC's
10052 (dynamically sized) vector. */
10055 tree_vec_elt_check_failed (int idx
, int len
, const char *file
, int line
,
10056 const char *function
)
10059 ("tree check: accessed elt %d of tree_vec with %d elts in %s, at %s:%d",
10060 idx
+ 1, len
, function
, trim_filename (file
), line
);
10063 /* Similar to above, except that the check is for the bounds of the operand
10064 vector of an expression node EXP. */
10067 tree_operand_check_failed (int idx
, const_tree exp
, const char *file
,
10068 int line
, const char *function
)
10070 enum tree_code code
= TREE_CODE (exp
);
10072 ("tree check: accessed operand %d of %s with %d operands in %s, at %s:%d",
10073 idx
+ 1, get_tree_code_name (code
), TREE_OPERAND_LENGTH (exp
),
10074 function
, trim_filename (file
), line
);
10077 /* Similar to above, except that the check is for the number of
10078 operands of an OMP_CLAUSE node. */
10081 omp_clause_operand_check_failed (int idx
, const_tree t
, const char *file
,
10082 int line
, const char *function
)
10085 ("tree check: accessed operand %d of omp_clause %s with %d operands "
10086 "in %s, at %s:%d", idx
+ 1, omp_clause_code_name
[OMP_CLAUSE_CODE (t
)],
10087 omp_clause_num_ops
[OMP_CLAUSE_CODE (t
)], function
,
10088 trim_filename (file
), line
);
10090 #endif /* ENABLE_TREE_CHECKING */
10092 /* Create a new vector type node holding SUBPARTS units of type INNERTYPE,
10093 and mapped to the machine mode MODE. Initialize its fields and build
10094 the information necessary for debugging output. */
10097 make_vector_type (tree innertype
, int nunits
, machine_mode mode
)
10100 tree mv_innertype
= TYPE_MAIN_VARIANT (innertype
);
10102 t
= make_node (VECTOR_TYPE
);
10103 TREE_TYPE (t
) = mv_innertype
;
10104 SET_TYPE_VECTOR_SUBPARTS (t
, nunits
);
10105 SET_TYPE_MODE (t
, mode
);
10107 if (TYPE_STRUCTURAL_EQUALITY_P (mv_innertype
) || in_lto_p
)
10108 SET_TYPE_STRUCTURAL_EQUALITY (t
);
10109 else if ((TYPE_CANONICAL (mv_innertype
) != innertype
10110 || mode
!= VOIDmode
)
10111 && !VECTOR_BOOLEAN_TYPE_P (t
))
10113 = make_vector_type (TYPE_CANONICAL (mv_innertype
), nunits
, VOIDmode
);
10117 hashval_t hash
= type_hash_canon_hash (t
);
10118 t
= type_hash_canon (hash
, t
);
10120 /* We have built a main variant, based on the main variant of the
10121 inner type. Use it to build the variant we return. */
10122 if ((TYPE_ATTRIBUTES (innertype
) || TYPE_QUALS (innertype
))
10123 && TREE_TYPE (t
) != innertype
)
10124 return build_type_attribute_qual_variant (t
,
10125 TYPE_ATTRIBUTES (innertype
),
10126 TYPE_QUALS (innertype
));
10132 make_or_reuse_type (unsigned size
, int unsignedp
)
10136 if (size
== INT_TYPE_SIZE
)
10137 return unsignedp
? unsigned_type_node
: integer_type_node
;
10138 if (size
== CHAR_TYPE_SIZE
)
10139 return unsignedp
? unsigned_char_type_node
: signed_char_type_node
;
10140 if (size
== SHORT_TYPE_SIZE
)
10141 return unsignedp
? short_unsigned_type_node
: short_integer_type_node
;
10142 if (size
== LONG_TYPE_SIZE
)
10143 return unsignedp
? long_unsigned_type_node
: long_integer_type_node
;
10144 if (size
== LONG_LONG_TYPE_SIZE
)
10145 return (unsignedp
? long_long_unsigned_type_node
10146 : long_long_integer_type_node
);
10148 for (i
= 0; i
< NUM_INT_N_ENTS
; i
++)
10149 if (size
== int_n_data
[i
].bitsize
10150 && int_n_enabled_p
[i
])
10151 return (unsignedp
? int_n_trees
[i
].unsigned_type
10152 : int_n_trees
[i
].signed_type
);
10155 return make_unsigned_type (size
);
10157 return make_signed_type (size
);
10160 /* Create or reuse a fract type by SIZE, UNSIGNEDP, and SATP. */
10163 make_or_reuse_fract_type (unsigned size
, int unsignedp
, int satp
)
10167 if (size
== SHORT_FRACT_TYPE_SIZE
)
10168 return unsignedp
? sat_unsigned_short_fract_type_node
10169 : sat_short_fract_type_node
;
10170 if (size
== FRACT_TYPE_SIZE
)
10171 return unsignedp
? sat_unsigned_fract_type_node
: sat_fract_type_node
;
10172 if (size
== LONG_FRACT_TYPE_SIZE
)
10173 return unsignedp
? sat_unsigned_long_fract_type_node
10174 : sat_long_fract_type_node
;
10175 if (size
== LONG_LONG_FRACT_TYPE_SIZE
)
10176 return unsignedp
? sat_unsigned_long_long_fract_type_node
10177 : sat_long_long_fract_type_node
;
10181 if (size
== SHORT_FRACT_TYPE_SIZE
)
10182 return unsignedp
? unsigned_short_fract_type_node
10183 : short_fract_type_node
;
10184 if (size
== FRACT_TYPE_SIZE
)
10185 return unsignedp
? unsigned_fract_type_node
: fract_type_node
;
10186 if (size
== LONG_FRACT_TYPE_SIZE
)
10187 return unsignedp
? unsigned_long_fract_type_node
10188 : long_fract_type_node
;
10189 if (size
== LONG_LONG_FRACT_TYPE_SIZE
)
10190 return unsignedp
? unsigned_long_long_fract_type_node
10191 : long_long_fract_type_node
;
10194 return make_fract_type (size
, unsignedp
, satp
);
10197 /* Create or reuse an accum type by SIZE, UNSIGNEDP, and SATP. */
10200 make_or_reuse_accum_type (unsigned size
, int unsignedp
, int satp
)
10204 if (size
== SHORT_ACCUM_TYPE_SIZE
)
10205 return unsignedp
? sat_unsigned_short_accum_type_node
10206 : sat_short_accum_type_node
;
10207 if (size
== ACCUM_TYPE_SIZE
)
10208 return unsignedp
? sat_unsigned_accum_type_node
: sat_accum_type_node
;
10209 if (size
== LONG_ACCUM_TYPE_SIZE
)
10210 return unsignedp
? sat_unsigned_long_accum_type_node
10211 : sat_long_accum_type_node
;
10212 if (size
== LONG_LONG_ACCUM_TYPE_SIZE
)
10213 return unsignedp
? sat_unsigned_long_long_accum_type_node
10214 : sat_long_long_accum_type_node
;
10218 if (size
== SHORT_ACCUM_TYPE_SIZE
)
10219 return unsignedp
? unsigned_short_accum_type_node
10220 : short_accum_type_node
;
10221 if (size
== ACCUM_TYPE_SIZE
)
10222 return unsignedp
? unsigned_accum_type_node
: accum_type_node
;
10223 if (size
== LONG_ACCUM_TYPE_SIZE
)
10224 return unsignedp
? unsigned_long_accum_type_node
10225 : long_accum_type_node
;
10226 if (size
== LONG_LONG_ACCUM_TYPE_SIZE
)
10227 return unsignedp
? unsigned_long_long_accum_type_node
10228 : long_long_accum_type_node
;
10231 return make_accum_type (size
, unsignedp
, satp
);
10235 /* Create an atomic variant node for TYPE. This routine is called
10236 during initialization of data types to create the 5 basic atomic
10237 types. The generic build_variant_type function requires these to
10238 already be set up in order to function properly, so cannot be
10239 called from there. If ALIGN is non-zero, then ensure alignment is
10240 overridden to this value. */
10243 build_atomic_base (tree type
, unsigned int align
)
10247 /* Make sure its not already registered. */
10248 if ((t
= get_qualified_type (type
, TYPE_QUAL_ATOMIC
)))
10251 t
= build_variant_type_copy (type
);
10252 set_type_quals (t
, TYPE_QUAL_ATOMIC
);
10255 SET_TYPE_ALIGN (t
, align
);
10260 /* Information about the _FloatN and _FloatNx types. This must be in
10261 the same order as the corresponding TI_* enum values. */
10262 const floatn_type_info floatn_nx_types
[NUM_FLOATN_NX_TYPES
] =
10274 /* Create nodes for all integer types (and error_mark_node) using the sizes
10275 of C datatypes. SIGNED_CHAR specifies whether char is signed. */
10278 build_common_tree_nodes (bool signed_char
)
10282 error_mark_node
= make_node (ERROR_MARK
);
10283 TREE_TYPE (error_mark_node
) = error_mark_node
;
10285 initialize_sizetypes ();
10287 /* Define both `signed char' and `unsigned char'. */
10288 signed_char_type_node
= make_signed_type (CHAR_TYPE_SIZE
);
10289 TYPE_STRING_FLAG (signed_char_type_node
) = 1;
10290 unsigned_char_type_node
= make_unsigned_type (CHAR_TYPE_SIZE
);
10291 TYPE_STRING_FLAG (unsigned_char_type_node
) = 1;
10293 /* Define `char', which is like either `signed char' or `unsigned char'
10294 but not the same as either. */
10297 ? make_signed_type (CHAR_TYPE_SIZE
)
10298 : make_unsigned_type (CHAR_TYPE_SIZE
));
10299 TYPE_STRING_FLAG (char_type_node
) = 1;
10301 short_integer_type_node
= make_signed_type (SHORT_TYPE_SIZE
);
10302 short_unsigned_type_node
= make_unsigned_type (SHORT_TYPE_SIZE
);
10303 integer_type_node
= make_signed_type (INT_TYPE_SIZE
);
10304 unsigned_type_node
= make_unsigned_type (INT_TYPE_SIZE
);
10305 long_integer_type_node
= make_signed_type (LONG_TYPE_SIZE
);
10306 long_unsigned_type_node
= make_unsigned_type (LONG_TYPE_SIZE
);
10307 long_long_integer_type_node
= make_signed_type (LONG_LONG_TYPE_SIZE
);
10308 long_long_unsigned_type_node
= make_unsigned_type (LONG_LONG_TYPE_SIZE
);
10310 for (i
= 0; i
< NUM_INT_N_ENTS
; i
++)
10312 int_n_trees
[i
].signed_type
= make_signed_type (int_n_data
[i
].bitsize
);
10313 int_n_trees
[i
].unsigned_type
= make_unsigned_type (int_n_data
[i
].bitsize
);
10314 TYPE_SIZE (int_n_trees
[i
].signed_type
) = bitsize_int (int_n_data
[i
].bitsize
);
10315 TYPE_SIZE (int_n_trees
[i
].unsigned_type
) = bitsize_int (int_n_data
[i
].bitsize
);
10317 if (int_n_data
[i
].bitsize
> LONG_LONG_TYPE_SIZE
10318 && int_n_enabled_p
[i
])
10320 integer_types
[itk_intN_0
+ i
* 2] = int_n_trees
[i
].signed_type
;
10321 integer_types
[itk_unsigned_intN_0
+ i
* 2] = int_n_trees
[i
].unsigned_type
;
10325 /* Define a boolean type. This type only represents boolean values but
10326 may be larger than char depending on the value of BOOL_TYPE_SIZE. */
10327 boolean_type_node
= make_unsigned_type (BOOL_TYPE_SIZE
);
10328 TREE_SET_CODE (boolean_type_node
, BOOLEAN_TYPE
);
10329 TYPE_PRECISION (boolean_type_node
) = 1;
10330 TYPE_MAX_VALUE (boolean_type_node
) = build_int_cst (boolean_type_node
, 1);
10332 /* Define what type to use for size_t. */
10333 if (strcmp (SIZE_TYPE
, "unsigned int") == 0)
10334 size_type_node
= unsigned_type_node
;
10335 else if (strcmp (SIZE_TYPE
, "long unsigned int") == 0)
10336 size_type_node
= long_unsigned_type_node
;
10337 else if (strcmp (SIZE_TYPE
, "long long unsigned int") == 0)
10338 size_type_node
= long_long_unsigned_type_node
;
10339 else if (strcmp (SIZE_TYPE
, "short unsigned int") == 0)
10340 size_type_node
= short_unsigned_type_node
;
10345 size_type_node
= NULL_TREE
;
10346 for (i
= 0; i
< NUM_INT_N_ENTS
; i
++)
10347 if (int_n_enabled_p
[i
])
10350 sprintf (name
, "__int%d unsigned", int_n_data
[i
].bitsize
);
10352 if (strcmp (name
, SIZE_TYPE
) == 0)
10354 size_type_node
= int_n_trees
[i
].unsigned_type
;
10357 if (size_type_node
== NULL_TREE
)
10358 gcc_unreachable ();
10361 /* Define what type to use for ptrdiff_t. */
10362 if (strcmp (PTRDIFF_TYPE
, "int") == 0)
10363 ptrdiff_type_node
= integer_type_node
;
10364 else if (strcmp (PTRDIFF_TYPE
, "long int") == 0)
10365 ptrdiff_type_node
= long_integer_type_node
;
10366 else if (strcmp (PTRDIFF_TYPE
, "long long int") == 0)
10367 ptrdiff_type_node
= long_long_integer_type_node
;
10368 else if (strcmp (PTRDIFF_TYPE
, "short int") == 0)
10369 ptrdiff_type_node
= short_integer_type_node
;
10372 ptrdiff_type_node
= NULL_TREE
;
10373 for (int i
= 0; i
< NUM_INT_N_ENTS
; i
++)
10374 if (int_n_enabled_p
[i
])
10377 sprintf (name
, "__int%d", int_n_data
[i
].bitsize
);
10378 if (strcmp (name
, PTRDIFF_TYPE
) == 0)
10379 ptrdiff_type_node
= int_n_trees
[i
].signed_type
;
10381 if (ptrdiff_type_node
== NULL_TREE
)
10382 gcc_unreachable ();
10385 /* Fill in the rest of the sized types. Reuse existing type nodes
10387 intQI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (QImode
), 0);
10388 intHI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (HImode
), 0);
10389 intSI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (SImode
), 0);
10390 intDI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (DImode
), 0);
10391 intTI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (TImode
), 0);
10393 unsigned_intQI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (QImode
), 1);
10394 unsigned_intHI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (HImode
), 1);
10395 unsigned_intSI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (SImode
), 1);
10396 unsigned_intDI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (DImode
), 1);
10397 unsigned_intTI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (TImode
), 1);
10399 /* Don't call build_qualified type for atomics. That routine does
10400 special processing for atomics, and until they are initialized
10401 it's better not to make that call.
10403 Check to see if there is a target override for atomic types. */
10405 atomicQI_type_node
= build_atomic_base (unsigned_intQI_type_node
,
10406 targetm
.atomic_align_for_mode (QImode
));
10407 atomicHI_type_node
= build_atomic_base (unsigned_intHI_type_node
,
10408 targetm
.atomic_align_for_mode (HImode
));
10409 atomicSI_type_node
= build_atomic_base (unsigned_intSI_type_node
,
10410 targetm
.atomic_align_for_mode (SImode
));
10411 atomicDI_type_node
= build_atomic_base (unsigned_intDI_type_node
,
10412 targetm
.atomic_align_for_mode (DImode
));
10413 atomicTI_type_node
= build_atomic_base (unsigned_intTI_type_node
,
10414 targetm
.atomic_align_for_mode (TImode
));
10416 access_public_node
= get_identifier ("public");
10417 access_protected_node
= get_identifier ("protected");
10418 access_private_node
= get_identifier ("private");
10420 /* Define these next since types below may used them. */
10421 integer_zero_node
= build_int_cst (integer_type_node
, 0);
10422 integer_one_node
= build_int_cst (integer_type_node
, 1);
10423 integer_three_node
= build_int_cst (integer_type_node
, 3);
10424 integer_minus_one_node
= build_int_cst (integer_type_node
, -1);
10426 size_zero_node
= size_int (0);
10427 size_one_node
= size_int (1);
10428 bitsize_zero_node
= bitsize_int (0);
10429 bitsize_one_node
= bitsize_int (1);
10430 bitsize_unit_node
= bitsize_int (BITS_PER_UNIT
);
10432 boolean_false_node
= TYPE_MIN_VALUE (boolean_type_node
);
10433 boolean_true_node
= TYPE_MAX_VALUE (boolean_type_node
);
10435 void_type_node
= make_node (VOID_TYPE
);
10436 layout_type (void_type_node
);
10438 pointer_bounds_type_node
= targetm
.chkp_bound_type ();
10440 /* We are not going to have real types in C with less than byte alignment,
10441 so we might as well not have any types that claim to have it. */
10442 SET_TYPE_ALIGN (void_type_node
, BITS_PER_UNIT
);
10443 TYPE_USER_ALIGN (void_type_node
) = 0;
10445 void_node
= make_node (VOID_CST
);
10446 TREE_TYPE (void_node
) = void_type_node
;
10448 null_pointer_node
= build_int_cst (build_pointer_type (void_type_node
), 0);
10449 layout_type (TREE_TYPE (null_pointer_node
));
10451 ptr_type_node
= build_pointer_type (void_type_node
);
10452 const_ptr_type_node
10453 = build_pointer_type (build_type_variant (void_type_node
, 1, 0));
10454 for (unsigned i
= 0;
10455 i
< sizeof (builtin_structptr_types
) / sizeof (builtin_structptr_type
);
10457 builtin_structptr_types
[i
].node
= builtin_structptr_types
[i
].base
;
10459 pointer_sized_int_node
= build_nonstandard_integer_type (POINTER_SIZE
, 1);
10461 float_type_node
= make_node (REAL_TYPE
);
10462 TYPE_PRECISION (float_type_node
) = FLOAT_TYPE_SIZE
;
10463 layout_type (float_type_node
);
10465 double_type_node
= make_node (REAL_TYPE
);
10466 TYPE_PRECISION (double_type_node
) = DOUBLE_TYPE_SIZE
;
10467 layout_type (double_type_node
);
10469 long_double_type_node
= make_node (REAL_TYPE
);
10470 TYPE_PRECISION (long_double_type_node
) = LONG_DOUBLE_TYPE_SIZE
;
10471 layout_type (long_double_type_node
);
10473 for (i
= 0; i
< NUM_FLOATN_NX_TYPES
; i
++)
10475 int n
= floatn_nx_types
[i
].n
;
10476 bool extended
= floatn_nx_types
[i
].extended
;
10477 machine_mode mode
= targetm
.floatn_mode (n
, extended
);
10478 if (mode
== VOIDmode
)
10480 int precision
= GET_MODE_PRECISION (mode
);
10481 /* Work around the rs6000 KFmode having precision 113 not
10483 const struct real_format
*fmt
= REAL_MODE_FORMAT (mode
);
10484 gcc_assert (fmt
->b
== 2 && fmt
->emin
+ fmt
->emax
== 3);
10485 int min_precision
= fmt
->p
+ ceil_log2 (fmt
->emax
- fmt
->emin
);
10487 gcc_assert (min_precision
== n
);
10488 if (precision
< min_precision
)
10489 precision
= min_precision
;
10490 FLOATN_NX_TYPE_NODE (i
) = make_node (REAL_TYPE
);
10491 TYPE_PRECISION (FLOATN_NX_TYPE_NODE (i
)) = precision
;
10492 layout_type (FLOATN_NX_TYPE_NODE (i
));
10493 SET_TYPE_MODE (FLOATN_NX_TYPE_NODE (i
), mode
);
10496 float_ptr_type_node
= build_pointer_type (float_type_node
);
10497 double_ptr_type_node
= build_pointer_type (double_type_node
);
10498 long_double_ptr_type_node
= build_pointer_type (long_double_type_node
);
10499 integer_ptr_type_node
= build_pointer_type (integer_type_node
);
10501 /* Fixed size integer types. */
10502 uint16_type_node
= make_or_reuse_type (16, 1);
10503 uint32_type_node
= make_or_reuse_type (32, 1);
10504 uint64_type_node
= make_or_reuse_type (64, 1);
10506 /* Decimal float types. */
10507 dfloat32_type_node
= make_node (REAL_TYPE
);
10508 TYPE_PRECISION (dfloat32_type_node
) = DECIMAL32_TYPE_SIZE
;
10509 SET_TYPE_MODE (dfloat32_type_node
, SDmode
);
10510 layout_type (dfloat32_type_node
);
10511 dfloat32_ptr_type_node
= build_pointer_type (dfloat32_type_node
);
10513 dfloat64_type_node
= make_node (REAL_TYPE
);
10514 TYPE_PRECISION (dfloat64_type_node
) = DECIMAL64_TYPE_SIZE
;
10515 SET_TYPE_MODE (dfloat64_type_node
, DDmode
);
10516 layout_type (dfloat64_type_node
);
10517 dfloat64_ptr_type_node
= build_pointer_type (dfloat64_type_node
);
10519 dfloat128_type_node
= make_node (REAL_TYPE
);
10520 TYPE_PRECISION (dfloat128_type_node
) = DECIMAL128_TYPE_SIZE
;
10521 SET_TYPE_MODE (dfloat128_type_node
, TDmode
);
10522 layout_type (dfloat128_type_node
);
10523 dfloat128_ptr_type_node
= build_pointer_type (dfloat128_type_node
);
10525 complex_integer_type_node
= build_complex_type (integer_type_node
, true);
10526 complex_float_type_node
= build_complex_type (float_type_node
, true);
10527 complex_double_type_node
= build_complex_type (double_type_node
, true);
10528 complex_long_double_type_node
= build_complex_type (long_double_type_node
,
10531 for (i
= 0; i
< NUM_FLOATN_NX_TYPES
; i
++)
10533 if (FLOATN_NX_TYPE_NODE (i
) != NULL_TREE
)
10534 COMPLEX_FLOATN_NX_TYPE_NODE (i
)
10535 = build_complex_type (FLOATN_NX_TYPE_NODE (i
));
10538 /* Make fixed-point nodes based on sat/non-sat and signed/unsigned. */
10539 #define MAKE_FIXED_TYPE_NODE(KIND,SIZE) \
10540 sat_ ## KIND ## _type_node = \
10541 make_sat_signed_ ## KIND ## _type (SIZE); \
10542 sat_unsigned_ ## KIND ## _type_node = \
10543 make_sat_unsigned_ ## KIND ## _type (SIZE); \
10544 KIND ## _type_node = make_signed_ ## KIND ## _type (SIZE); \
10545 unsigned_ ## KIND ## _type_node = \
10546 make_unsigned_ ## KIND ## _type (SIZE);
10548 #define MAKE_FIXED_TYPE_NODE_WIDTH(KIND,WIDTH,SIZE) \
10549 sat_ ## WIDTH ## KIND ## _type_node = \
10550 make_sat_signed_ ## KIND ## _type (SIZE); \
10551 sat_unsigned_ ## WIDTH ## KIND ## _type_node = \
10552 make_sat_unsigned_ ## KIND ## _type (SIZE); \
10553 WIDTH ## KIND ## _type_node = make_signed_ ## KIND ## _type (SIZE); \
10554 unsigned_ ## WIDTH ## KIND ## _type_node = \
10555 make_unsigned_ ## KIND ## _type (SIZE);
10557 /* Make fixed-point type nodes based on four different widths. */
10558 #define MAKE_FIXED_TYPE_NODE_FAMILY(N1,N2) \
10559 MAKE_FIXED_TYPE_NODE_WIDTH (N1, short_, SHORT_ ## N2 ## _TYPE_SIZE) \
10560 MAKE_FIXED_TYPE_NODE (N1, N2 ## _TYPE_SIZE) \
10561 MAKE_FIXED_TYPE_NODE_WIDTH (N1, long_, LONG_ ## N2 ## _TYPE_SIZE) \
10562 MAKE_FIXED_TYPE_NODE_WIDTH (N1, long_long_, LONG_LONG_ ## N2 ## _TYPE_SIZE)
10564 /* Make fixed-point mode nodes based on sat/non-sat and signed/unsigned. */
10565 #define MAKE_FIXED_MODE_NODE(KIND,NAME,MODE) \
10566 NAME ## _type_node = \
10567 make_or_reuse_signed_ ## KIND ## _type (GET_MODE_BITSIZE (MODE ## mode)); \
10568 u ## NAME ## _type_node = \
10569 make_or_reuse_unsigned_ ## KIND ## _type \
10570 (GET_MODE_BITSIZE (U ## MODE ## mode)); \
10571 sat_ ## NAME ## _type_node = \
10572 make_or_reuse_sat_signed_ ## KIND ## _type \
10573 (GET_MODE_BITSIZE (MODE ## mode)); \
10574 sat_u ## NAME ## _type_node = \
10575 make_or_reuse_sat_unsigned_ ## KIND ## _type \
10576 (GET_MODE_BITSIZE (U ## MODE ## mode));
10578 /* Fixed-point type and mode nodes. */
10579 MAKE_FIXED_TYPE_NODE_FAMILY (fract
, FRACT
)
10580 MAKE_FIXED_TYPE_NODE_FAMILY (accum
, ACCUM
)
10581 MAKE_FIXED_MODE_NODE (fract
, qq
, QQ
)
10582 MAKE_FIXED_MODE_NODE (fract
, hq
, HQ
)
10583 MAKE_FIXED_MODE_NODE (fract
, sq
, SQ
)
10584 MAKE_FIXED_MODE_NODE (fract
, dq
, DQ
)
10585 MAKE_FIXED_MODE_NODE (fract
, tq
, TQ
)
10586 MAKE_FIXED_MODE_NODE (accum
, ha
, HA
)
10587 MAKE_FIXED_MODE_NODE (accum
, sa
, SA
)
10588 MAKE_FIXED_MODE_NODE (accum
, da
, DA
)
10589 MAKE_FIXED_MODE_NODE (accum
, ta
, TA
)
10592 tree t
= targetm
.build_builtin_va_list ();
10594 /* Many back-ends define record types without setting TYPE_NAME.
10595 If we copied the record type here, we'd keep the original
10596 record type without a name. This breaks name mangling. So,
10597 don't copy record types and let c_common_nodes_and_builtins()
10598 declare the type to be __builtin_va_list. */
10599 if (TREE_CODE (t
) != RECORD_TYPE
)
10600 t
= build_variant_type_copy (t
);
10602 va_list_type_node
= t
;
10606 /* Modify DECL for given flags.
10607 TM_PURE attribute is set only on types, so the function will modify
10608 DECL's type when ECF_TM_PURE is used. */
10611 set_call_expr_flags (tree decl
, int flags
)
10613 if (flags
& ECF_NOTHROW
)
10614 TREE_NOTHROW (decl
) = 1;
10615 if (flags
& ECF_CONST
)
10616 TREE_READONLY (decl
) = 1;
10617 if (flags
& ECF_PURE
)
10618 DECL_PURE_P (decl
) = 1;
10619 if (flags
& ECF_LOOPING_CONST_OR_PURE
)
10620 DECL_LOOPING_CONST_OR_PURE_P (decl
) = 1;
10621 if (flags
& ECF_NOVOPS
)
10622 DECL_IS_NOVOPS (decl
) = 1;
10623 if (flags
& ECF_NORETURN
)
10624 TREE_THIS_VOLATILE (decl
) = 1;
10625 if (flags
& ECF_MALLOC
)
10626 DECL_IS_MALLOC (decl
) = 1;
10627 if (flags
& ECF_RETURNS_TWICE
)
10628 DECL_IS_RETURNS_TWICE (decl
) = 1;
10629 if (flags
& ECF_LEAF
)
10630 DECL_ATTRIBUTES (decl
) = tree_cons (get_identifier ("leaf"),
10631 NULL
, DECL_ATTRIBUTES (decl
));
10632 if (flags
& ECF_COLD
)
10633 DECL_ATTRIBUTES (decl
) = tree_cons (get_identifier ("cold"),
10634 NULL
, DECL_ATTRIBUTES (decl
));
10635 if (flags
& ECF_RET1
)
10636 DECL_ATTRIBUTES (decl
)
10637 = tree_cons (get_identifier ("fn spec"),
10638 build_tree_list (NULL_TREE
, build_string (1, "1")),
10639 DECL_ATTRIBUTES (decl
));
10640 if ((flags
& ECF_TM_PURE
) && flag_tm
)
10641 apply_tm_attr (decl
, get_identifier ("transaction_pure"));
10642 /* Looping const or pure is implied by noreturn.
10643 There is currently no way to declare looping const or looping pure alone. */
10644 gcc_assert (!(flags
& ECF_LOOPING_CONST_OR_PURE
)
10645 || ((flags
& ECF_NORETURN
) && (flags
& (ECF_CONST
| ECF_PURE
))));
10649 /* A subroutine of build_common_builtin_nodes. Define a builtin function. */
10652 local_define_builtin (const char *name
, tree type
, enum built_in_function code
,
10653 const char *library_name
, int ecf_flags
)
10657 decl
= add_builtin_function (name
, type
, code
, BUILT_IN_NORMAL
,
10658 library_name
, NULL_TREE
);
10659 set_call_expr_flags (decl
, ecf_flags
);
10661 set_builtin_decl (code
, decl
, true);
10664 /* Call this function after instantiating all builtins that the language
10665 front end cares about. This will build the rest of the builtins
10666 and internal functions that are relied upon by the tree optimizers and
10670 build_common_builtin_nodes (void)
10675 if (!builtin_decl_explicit_p (BUILT_IN_UNREACHABLE
)
10676 || !builtin_decl_explicit_p (BUILT_IN_ABORT
))
10678 ftype
= build_function_type (void_type_node
, void_list_node
);
10679 if (!builtin_decl_explicit_p (BUILT_IN_UNREACHABLE
))
10680 local_define_builtin ("__builtin_unreachable", ftype
,
10681 BUILT_IN_UNREACHABLE
,
10682 "__builtin_unreachable",
10683 ECF_NOTHROW
| ECF_LEAF
| ECF_NORETURN
10684 | ECF_CONST
| ECF_COLD
);
10685 if (!builtin_decl_explicit_p (BUILT_IN_ABORT
))
10686 local_define_builtin ("__builtin_abort", ftype
, BUILT_IN_ABORT
,
10688 ECF_LEAF
| ECF_NORETURN
| ECF_CONST
| ECF_COLD
);
10691 if (!builtin_decl_explicit_p (BUILT_IN_MEMCPY
)
10692 || !builtin_decl_explicit_p (BUILT_IN_MEMMOVE
))
10694 ftype
= build_function_type_list (ptr_type_node
,
10695 ptr_type_node
, const_ptr_type_node
,
10696 size_type_node
, NULL_TREE
);
10698 if (!builtin_decl_explicit_p (BUILT_IN_MEMCPY
))
10699 local_define_builtin ("__builtin_memcpy", ftype
, BUILT_IN_MEMCPY
,
10700 "memcpy", ECF_NOTHROW
| ECF_LEAF
| ECF_RET1
);
10701 if (!builtin_decl_explicit_p (BUILT_IN_MEMMOVE
))
10702 local_define_builtin ("__builtin_memmove", ftype
, BUILT_IN_MEMMOVE
,
10703 "memmove", ECF_NOTHROW
| ECF_LEAF
| ECF_RET1
);
10706 if (!builtin_decl_explicit_p (BUILT_IN_MEMCMP
))
10708 ftype
= build_function_type_list (integer_type_node
, const_ptr_type_node
,
10709 const_ptr_type_node
, size_type_node
,
10711 local_define_builtin ("__builtin_memcmp", ftype
, BUILT_IN_MEMCMP
,
10712 "memcmp", ECF_PURE
| ECF_NOTHROW
| ECF_LEAF
);
10715 if (!builtin_decl_explicit_p (BUILT_IN_MEMSET
))
10717 ftype
= build_function_type_list (ptr_type_node
,
10718 ptr_type_node
, integer_type_node
,
10719 size_type_node
, NULL_TREE
);
10720 local_define_builtin ("__builtin_memset", ftype
, BUILT_IN_MEMSET
,
10721 "memset", ECF_NOTHROW
| ECF_LEAF
| ECF_RET1
);
10724 /* If we're checking the stack, `alloca' can throw. */
10725 const int alloca_flags
10726 = ECF_MALLOC
| ECF_LEAF
| (flag_stack_check
? 0 : ECF_NOTHROW
);
10728 if (!builtin_decl_explicit_p (BUILT_IN_ALLOCA
))
10730 ftype
= build_function_type_list (ptr_type_node
,
10731 size_type_node
, NULL_TREE
);
10732 local_define_builtin ("__builtin_alloca", ftype
, BUILT_IN_ALLOCA
,
10733 "alloca", alloca_flags
);
10736 ftype
= build_function_type_list (ptr_type_node
, size_type_node
,
10737 size_type_node
, NULL_TREE
);
10738 local_define_builtin ("__builtin_alloca_with_align", ftype
,
10739 BUILT_IN_ALLOCA_WITH_ALIGN
,
10740 "__builtin_alloca_with_align",
10743 ftype
= build_function_type_list (void_type_node
,
10744 ptr_type_node
, ptr_type_node
,
10745 ptr_type_node
, NULL_TREE
);
10746 local_define_builtin ("__builtin_init_trampoline", ftype
,
10747 BUILT_IN_INIT_TRAMPOLINE
,
10748 "__builtin_init_trampoline", ECF_NOTHROW
| ECF_LEAF
);
10749 local_define_builtin ("__builtin_init_heap_trampoline", ftype
,
10750 BUILT_IN_INIT_HEAP_TRAMPOLINE
,
10751 "__builtin_init_heap_trampoline",
10752 ECF_NOTHROW
| ECF_LEAF
);
10753 local_define_builtin ("__builtin_init_descriptor", ftype
,
10754 BUILT_IN_INIT_DESCRIPTOR
,
10755 "__builtin_init_descriptor", ECF_NOTHROW
| ECF_LEAF
);
10757 ftype
= build_function_type_list (ptr_type_node
, ptr_type_node
, NULL_TREE
);
10758 local_define_builtin ("__builtin_adjust_trampoline", ftype
,
10759 BUILT_IN_ADJUST_TRAMPOLINE
,
10760 "__builtin_adjust_trampoline",
10761 ECF_CONST
| ECF_NOTHROW
);
10762 local_define_builtin ("__builtin_adjust_descriptor", ftype
,
10763 BUILT_IN_ADJUST_DESCRIPTOR
,
10764 "__builtin_adjust_descriptor",
10765 ECF_CONST
| ECF_NOTHROW
);
10767 ftype
= build_function_type_list (void_type_node
,
10768 ptr_type_node
, ptr_type_node
, NULL_TREE
);
10769 local_define_builtin ("__builtin_nonlocal_goto", ftype
,
10770 BUILT_IN_NONLOCAL_GOTO
,
10771 "__builtin_nonlocal_goto",
10772 ECF_NORETURN
| ECF_NOTHROW
);
10774 ftype
= build_function_type_list (void_type_node
,
10775 ptr_type_node
, ptr_type_node
, NULL_TREE
);
10776 local_define_builtin ("__builtin_setjmp_setup", ftype
,
10777 BUILT_IN_SETJMP_SETUP
,
10778 "__builtin_setjmp_setup", ECF_NOTHROW
);
10780 ftype
= build_function_type_list (void_type_node
, ptr_type_node
, NULL_TREE
);
10781 local_define_builtin ("__builtin_setjmp_receiver", ftype
,
10782 BUILT_IN_SETJMP_RECEIVER
,
10783 "__builtin_setjmp_receiver", ECF_NOTHROW
| ECF_LEAF
);
10785 ftype
= build_function_type_list (ptr_type_node
, NULL_TREE
);
10786 local_define_builtin ("__builtin_stack_save", ftype
, BUILT_IN_STACK_SAVE
,
10787 "__builtin_stack_save", ECF_NOTHROW
| ECF_LEAF
);
10789 ftype
= build_function_type_list (void_type_node
, ptr_type_node
, NULL_TREE
);
10790 local_define_builtin ("__builtin_stack_restore", ftype
,
10791 BUILT_IN_STACK_RESTORE
,
10792 "__builtin_stack_restore", ECF_NOTHROW
| ECF_LEAF
);
10794 ftype
= build_function_type_list (integer_type_node
, const_ptr_type_node
,
10795 const_ptr_type_node
, size_type_node
,
10797 local_define_builtin ("__builtin_memcmp_eq", ftype
, BUILT_IN_MEMCMP_EQ
,
10798 "__builtin_memcmp_eq",
10799 ECF_PURE
| ECF_NOTHROW
| ECF_LEAF
);
10801 /* If there's a possibility that we might use the ARM EABI, build the
10802 alternate __cxa_end_cleanup node used to resume from C++ and Java. */
10803 if (targetm
.arm_eabi_unwinder
)
10805 ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
10806 local_define_builtin ("__builtin_cxa_end_cleanup", ftype
,
10807 BUILT_IN_CXA_END_CLEANUP
,
10808 "__cxa_end_cleanup", ECF_NORETURN
| ECF_LEAF
);
10811 ftype
= build_function_type_list (void_type_node
, ptr_type_node
, NULL_TREE
);
10812 local_define_builtin ("__builtin_unwind_resume", ftype
,
10813 BUILT_IN_UNWIND_RESUME
,
10814 ((targetm_common
.except_unwind_info (&global_options
)
10816 ? "_Unwind_SjLj_Resume" : "_Unwind_Resume"),
10819 if (builtin_decl_explicit (BUILT_IN_RETURN_ADDRESS
) == NULL_TREE
)
10821 ftype
= build_function_type_list (ptr_type_node
, integer_type_node
,
10823 local_define_builtin ("__builtin_return_address", ftype
,
10824 BUILT_IN_RETURN_ADDRESS
,
10825 "__builtin_return_address",
10829 if (!builtin_decl_explicit_p (BUILT_IN_PROFILE_FUNC_ENTER
)
10830 || !builtin_decl_explicit_p (BUILT_IN_PROFILE_FUNC_EXIT
))
10832 ftype
= build_function_type_list (void_type_node
, ptr_type_node
,
10833 ptr_type_node
, NULL_TREE
);
10834 if (!builtin_decl_explicit_p (BUILT_IN_PROFILE_FUNC_ENTER
))
10835 local_define_builtin ("__cyg_profile_func_enter", ftype
,
10836 BUILT_IN_PROFILE_FUNC_ENTER
,
10837 "__cyg_profile_func_enter", 0);
10838 if (!builtin_decl_explicit_p (BUILT_IN_PROFILE_FUNC_EXIT
))
10839 local_define_builtin ("__cyg_profile_func_exit", ftype
,
10840 BUILT_IN_PROFILE_FUNC_EXIT
,
10841 "__cyg_profile_func_exit", 0);
10844 /* The exception object and filter values from the runtime. The argument
10845 must be zero before exception lowering, i.e. from the front end. After
10846 exception lowering, it will be the region number for the exception
10847 landing pad. These functions are PURE instead of CONST to prevent
10848 them from being hoisted past the exception edge that will initialize
10849 its value in the landing pad. */
10850 ftype
= build_function_type_list (ptr_type_node
,
10851 integer_type_node
, NULL_TREE
);
10852 ecf_flags
= ECF_PURE
| ECF_NOTHROW
| ECF_LEAF
;
10853 /* Only use TM_PURE if we have TM language support. */
10854 if (builtin_decl_explicit_p (BUILT_IN_TM_LOAD_1
))
10855 ecf_flags
|= ECF_TM_PURE
;
10856 local_define_builtin ("__builtin_eh_pointer", ftype
, BUILT_IN_EH_POINTER
,
10857 "__builtin_eh_pointer", ecf_flags
);
10859 tmp
= lang_hooks
.types
.type_for_mode (targetm
.eh_return_filter_mode (), 0);
10860 ftype
= build_function_type_list (tmp
, integer_type_node
, NULL_TREE
);
10861 local_define_builtin ("__builtin_eh_filter", ftype
, BUILT_IN_EH_FILTER
,
10862 "__builtin_eh_filter", ECF_PURE
| ECF_NOTHROW
| ECF_LEAF
);
10864 ftype
= build_function_type_list (void_type_node
,
10865 integer_type_node
, integer_type_node
,
10867 local_define_builtin ("__builtin_eh_copy_values", ftype
,
10868 BUILT_IN_EH_COPY_VALUES
,
10869 "__builtin_eh_copy_values", ECF_NOTHROW
);
10871 /* Complex multiplication and division. These are handled as builtins
10872 rather than optabs because emit_library_call_value doesn't support
10873 complex. Further, we can do slightly better with folding these
10874 beasties if the real and complex parts of the arguments are separate. */
10878 for (mode
= MIN_MODE_COMPLEX_FLOAT
; mode
<= MAX_MODE_COMPLEX_FLOAT
; ++mode
)
10880 char mode_name_buf
[4], *q
;
10882 enum built_in_function mcode
, dcode
;
10883 tree type
, inner_type
;
10884 const char *prefix
= "__";
10886 if (targetm
.libfunc_gnu_prefix
)
10889 type
= lang_hooks
.types
.type_for_mode ((machine_mode
) mode
, 0);
10892 inner_type
= TREE_TYPE (type
);
10894 ftype
= build_function_type_list (type
, inner_type
, inner_type
,
10895 inner_type
, inner_type
, NULL_TREE
);
10897 mcode
= ((enum built_in_function
)
10898 (BUILT_IN_COMPLEX_MUL_MIN
+ mode
- MIN_MODE_COMPLEX_FLOAT
));
10899 dcode
= ((enum built_in_function
)
10900 (BUILT_IN_COMPLEX_DIV_MIN
+ mode
- MIN_MODE_COMPLEX_FLOAT
));
10902 for (p
= GET_MODE_NAME (mode
), q
= mode_name_buf
; *p
; p
++, q
++)
10906 built_in_names
[mcode
] = concat (prefix
, "mul", mode_name_buf
, "3",
10908 local_define_builtin (built_in_names
[mcode
], ftype
, mcode
,
10909 built_in_names
[mcode
],
10910 ECF_CONST
| ECF_NOTHROW
| ECF_LEAF
);
10912 built_in_names
[dcode
] = concat (prefix
, "div", mode_name_buf
, "3",
10914 local_define_builtin (built_in_names
[dcode
], ftype
, dcode
,
10915 built_in_names
[dcode
],
10916 ECF_CONST
| ECF_NOTHROW
| ECF_LEAF
);
10920 init_internal_fns ();
10923 /* HACK. GROSS. This is absolutely disgusting. I wish there was a
10926 If we requested a pointer to a vector, build up the pointers that
10927 we stripped off while looking for the inner type. Similarly for
10928 return values from functions.
10930 The argument TYPE is the top of the chain, and BOTTOM is the
10931 new type which we will point to. */
10934 reconstruct_complex_type (tree type
, tree bottom
)
10938 if (TREE_CODE (type
) == POINTER_TYPE
)
10940 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
10941 outer
= build_pointer_type_for_mode (inner
, TYPE_MODE (type
),
10942 TYPE_REF_CAN_ALIAS_ALL (type
));
10944 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
10946 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
10947 outer
= build_reference_type_for_mode (inner
, TYPE_MODE (type
),
10948 TYPE_REF_CAN_ALIAS_ALL (type
));
10950 else if (TREE_CODE (type
) == ARRAY_TYPE
)
10952 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
10953 outer
= build_array_type (inner
, TYPE_DOMAIN (type
));
10955 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10957 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
10958 outer
= build_function_type (inner
, TYPE_ARG_TYPES (type
));
10960 else if (TREE_CODE (type
) == METHOD_TYPE
)
10962 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
10963 /* The build_method_type_directly() routine prepends 'this' to argument list,
10964 so we must compensate by getting rid of it. */
10966 = build_method_type_directly
10967 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (type
))),
10969 TREE_CHAIN (TYPE_ARG_TYPES (type
)));
10971 else if (TREE_CODE (type
) == OFFSET_TYPE
)
10973 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
10974 outer
= build_offset_type (TYPE_OFFSET_BASETYPE (type
), inner
);
10979 return build_type_attribute_qual_variant (outer
, TYPE_ATTRIBUTES (type
),
10980 TYPE_QUALS (type
));
10983 /* Returns a vector tree node given a mode (integer, vector, or BLKmode) and
10986 build_vector_type_for_mode (tree innertype
, machine_mode mode
)
10990 switch (GET_MODE_CLASS (mode
))
10992 case MODE_VECTOR_INT
:
10993 case MODE_VECTOR_FLOAT
:
10994 case MODE_VECTOR_FRACT
:
10995 case MODE_VECTOR_UFRACT
:
10996 case MODE_VECTOR_ACCUM
:
10997 case MODE_VECTOR_UACCUM
:
10998 nunits
= GET_MODE_NUNITS (mode
);
11002 /* Check that there are no leftover bits. */
11003 gcc_assert (GET_MODE_BITSIZE (mode
)
11004 % TREE_INT_CST_LOW (TYPE_SIZE (innertype
)) == 0);
11006 nunits
= GET_MODE_BITSIZE (mode
)
11007 / TREE_INT_CST_LOW (TYPE_SIZE (innertype
));
11011 gcc_unreachable ();
11014 return make_vector_type (innertype
, nunits
, mode
);
11017 /* Similarly, but takes the inner type and number of units, which must be
11021 build_vector_type (tree innertype
, int nunits
)
11023 return make_vector_type (innertype
, nunits
, VOIDmode
);
11026 /* Build truth vector with specified length and number of units. */
11029 build_truth_vector_type (unsigned nunits
, unsigned vector_size
)
11031 machine_mode mask_mode
= targetm
.vectorize
.get_mask_mode (nunits
,
11034 gcc_assert (mask_mode
!= VOIDmode
);
11036 unsigned HOST_WIDE_INT vsize
;
11037 if (mask_mode
== BLKmode
)
11038 vsize
= vector_size
* BITS_PER_UNIT
;
11040 vsize
= GET_MODE_BITSIZE (mask_mode
);
11042 unsigned HOST_WIDE_INT esize
= vsize
/ nunits
;
11043 gcc_assert (esize
* nunits
== vsize
);
11045 tree bool_type
= build_nonstandard_boolean_type (esize
);
11047 return make_vector_type (bool_type
, nunits
, mask_mode
);
11050 /* Returns a vector type corresponding to a comparison of VECTYPE. */
11053 build_same_sized_truth_vector_type (tree vectype
)
11055 if (VECTOR_BOOLEAN_TYPE_P (vectype
))
11058 unsigned HOST_WIDE_INT size
= GET_MODE_SIZE (TYPE_MODE (vectype
));
11061 size
= tree_to_uhwi (TYPE_SIZE_UNIT (vectype
));
11063 return build_truth_vector_type (TYPE_VECTOR_SUBPARTS (vectype
), size
);
11066 /* Similarly, but builds a variant type with TYPE_VECTOR_OPAQUE set. */
11069 build_opaque_vector_type (tree innertype
, int nunits
)
11071 tree t
= make_vector_type (innertype
, nunits
, VOIDmode
);
11073 /* We always build the non-opaque variant before the opaque one,
11074 so if it already exists, it is TYPE_NEXT_VARIANT of this one. */
11075 cand
= TYPE_NEXT_VARIANT (t
);
11077 && TYPE_VECTOR_OPAQUE (cand
)
11078 && check_qualified_type (cand
, t
, TYPE_QUALS (t
)))
11080 /* Othewise build a variant type and make sure to queue it after
11081 the non-opaque type. */
11082 cand
= build_distinct_type_copy (t
);
11083 TYPE_VECTOR_OPAQUE (cand
) = true;
11084 TYPE_CANONICAL (cand
) = TYPE_CANONICAL (t
);
11085 TYPE_NEXT_VARIANT (cand
) = TYPE_NEXT_VARIANT (t
);
11086 TYPE_NEXT_VARIANT (t
) = cand
;
11087 TYPE_MAIN_VARIANT (cand
) = TYPE_MAIN_VARIANT (t
);
11092 /* Given an initializer INIT, return TRUE if INIT is zero or some
11093 aggregate of zeros. Otherwise return FALSE. */
11095 initializer_zerop (const_tree init
)
11101 switch (TREE_CODE (init
))
11104 return integer_zerop (init
);
11107 /* ??? Note that this is not correct for C4X float formats. There,
11108 a bit pattern of all zeros is 1.0; 0.0 is encoded with the most
11109 negative exponent. */
11110 return real_zerop (init
)
11111 && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (init
));
11114 return fixed_zerop (init
);
11117 return integer_zerop (init
)
11118 || (real_zerop (init
)
11119 && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (TREE_REALPART (init
)))
11120 && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (TREE_IMAGPART (init
))));
11125 for (i
= 0; i
< VECTOR_CST_NELTS (init
); ++i
)
11126 if (!initializer_zerop (VECTOR_CST_ELT (init
, i
)))
11133 unsigned HOST_WIDE_INT idx
;
11135 if (TREE_CLOBBER_P (init
))
11137 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (init
), idx
, elt
)
11138 if (!initializer_zerop (elt
))
11147 /* We need to loop through all elements to handle cases like
11148 "\0" and "\0foobar". */
11149 for (i
= 0; i
< TREE_STRING_LENGTH (init
); ++i
)
11150 if (TREE_STRING_POINTER (init
)[i
] != '\0')
11161 /* Check if vector VEC consists of all the equal elements and
11162 that the number of elements corresponds to the type of VEC.
11163 The function returns first element of the vector
11164 or NULL_TREE if the vector is not uniform. */
11166 uniform_vector_p (const_tree vec
)
11171 if (vec
== NULL_TREE
)
11174 gcc_assert (VECTOR_TYPE_P (TREE_TYPE (vec
)));
11176 if (TREE_CODE (vec
) == VECTOR_CST
)
11178 first
= VECTOR_CST_ELT (vec
, 0);
11179 for (i
= 1; i
< VECTOR_CST_NELTS (vec
); ++i
)
11180 if (!operand_equal_p (first
, VECTOR_CST_ELT (vec
, i
), 0))
11186 else if (TREE_CODE (vec
) == CONSTRUCTOR
)
11188 first
= error_mark_node
;
11190 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (vec
), i
, t
)
11197 if (!operand_equal_p (first
, t
, 0))
11200 if (i
!= TYPE_VECTOR_SUBPARTS (TREE_TYPE (vec
)))
11209 /* Build an empty statement at location LOC. */
11212 build_empty_stmt (location_t loc
)
11214 tree t
= build1 (NOP_EXPR
, void_type_node
, size_zero_node
);
11215 SET_EXPR_LOCATION (t
, loc
);
11220 /* Build an OpenMP clause with code CODE. LOC is the location of the
11224 build_omp_clause (location_t loc
, enum omp_clause_code code
)
11229 length
= omp_clause_num_ops
[code
];
11230 size
= (sizeof (struct tree_omp_clause
) + (length
- 1) * sizeof (tree
));
11232 record_node_allocation_statistics (OMP_CLAUSE
, size
);
11234 t
= (tree
) ggc_internal_alloc (size
);
11235 memset (t
, 0, size
);
11236 TREE_SET_CODE (t
, OMP_CLAUSE
);
11237 OMP_CLAUSE_SET_CODE (t
, code
);
11238 OMP_CLAUSE_LOCATION (t
) = loc
;
11243 /* Build a tcc_vl_exp object with code CODE and room for LEN operands. LEN
11244 includes the implicit operand count in TREE_OPERAND 0, and so must be >= 1.
11245 Except for the CODE and operand count field, other storage for the
11246 object is initialized to zeros. */
11249 build_vl_exp_stat (enum tree_code code
, int len MEM_STAT_DECL
)
11252 int length
= (len
- 1) * sizeof (tree
) + sizeof (struct tree_exp
);
11254 gcc_assert (TREE_CODE_CLASS (code
) == tcc_vl_exp
);
11255 gcc_assert (len
>= 1);
11257 record_node_allocation_statistics (code
, length
);
11259 t
= ggc_alloc_cleared_tree_node_stat (length PASS_MEM_STAT
);
11261 TREE_SET_CODE (t
, code
);
11263 /* Can't use TREE_OPERAND to store the length because if checking is
11264 enabled, it will try to check the length before we store it. :-P */
11265 t
->exp
.operands
[0] = build_int_cst (sizetype
, len
);
11270 /* Helper function for build_call_* functions; build a CALL_EXPR with
11271 indicated RETURN_TYPE, FN, and NARGS, but do not initialize any of
11272 the argument slots. */
11275 build_call_1 (tree return_type
, tree fn
, int nargs
)
11279 t
= build_vl_exp (CALL_EXPR
, nargs
+ 3);
11280 TREE_TYPE (t
) = return_type
;
11281 CALL_EXPR_FN (t
) = fn
;
11282 CALL_EXPR_STATIC_CHAIN (t
) = NULL
;
11287 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and
11288 FN and a null static chain slot. NARGS is the number of call arguments
11289 which are specified as "..." arguments. */
11292 build_call_nary (tree return_type
, tree fn
, int nargs
, ...)
11296 va_start (args
, nargs
);
11297 ret
= build_call_valist (return_type
, fn
, nargs
, args
);
11302 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and
11303 FN and a null static chain slot. NARGS is the number of call arguments
11304 which are specified as a va_list ARGS. */
11307 build_call_valist (tree return_type
, tree fn
, int nargs
, va_list args
)
11312 t
= build_call_1 (return_type
, fn
, nargs
);
11313 for (i
= 0; i
< nargs
; i
++)
11314 CALL_EXPR_ARG (t
, i
) = va_arg (args
, tree
);
11315 process_call_operands (t
);
11319 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and
11320 FN and a null static chain slot. NARGS is the number of call arguments
11321 which are specified as a tree array ARGS. */
11324 build_call_array_loc (location_t loc
, tree return_type
, tree fn
,
11325 int nargs
, const tree
*args
)
11330 t
= build_call_1 (return_type
, fn
, nargs
);
11331 for (i
= 0; i
< nargs
; i
++)
11332 CALL_EXPR_ARG (t
, i
) = args
[i
];
11333 process_call_operands (t
);
11334 SET_EXPR_LOCATION (t
, loc
);
11338 /* Like build_call_array, but takes a vec. */
11341 build_call_vec (tree return_type
, tree fn
, vec
<tree
, va_gc
> *args
)
11346 ret
= build_call_1 (return_type
, fn
, vec_safe_length (args
));
11347 FOR_EACH_VEC_SAFE_ELT (args
, ix
, t
)
11348 CALL_EXPR_ARG (ret
, ix
) = t
;
11349 process_call_operands (ret
);
11353 /* Conveniently construct a function call expression. FNDECL names the
11354 function to be called and N arguments are passed in the array
11358 build_call_expr_loc_array (location_t loc
, tree fndecl
, int n
, tree
*argarray
)
11360 tree fntype
= TREE_TYPE (fndecl
);
11361 tree fn
= build1 (ADDR_EXPR
, build_pointer_type (fntype
), fndecl
);
11363 return fold_build_call_array_loc (loc
, TREE_TYPE (fntype
), fn
, n
, argarray
);
11366 /* Conveniently construct a function call expression. FNDECL names the
11367 function to be called and the arguments are passed in the vector
11371 build_call_expr_loc_vec (location_t loc
, tree fndecl
, vec
<tree
, va_gc
> *vec
)
11373 return build_call_expr_loc_array (loc
, fndecl
, vec_safe_length (vec
),
11374 vec_safe_address (vec
));
11378 /* Conveniently construct a function call expression. FNDECL names the
11379 function to be called, N is the number of arguments, and the "..."
11380 parameters are the argument expressions. */
11383 build_call_expr_loc (location_t loc
, tree fndecl
, int n
, ...)
11386 tree
*argarray
= XALLOCAVEC (tree
, n
);
11390 for (i
= 0; i
< n
; i
++)
11391 argarray
[i
] = va_arg (ap
, tree
);
11393 return build_call_expr_loc_array (loc
, fndecl
, n
, argarray
);
11396 /* Like build_call_expr_loc (UNKNOWN_LOCATION, ...). Duplicated because
11397 varargs macros aren't supported by all bootstrap compilers. */
11400 build_call_expr (tree fndecl
, int n
, ...)
11403 tree
*argarray
= XALLOCAVEC (tree
, n
);
11407 for (i
= 0; i
< n
; i
++)
11408 argarray
[i
] = va_arg (ap
, tree
);
11410 return build_call_expr_loc_array (UNKNOWN_LOCATION
, fndecl
, n
, argarray
);
11413 /* Build an internal call to IFN, with arguments ARGS[0:N-1] and with return
11414 type TYPE. This is just like CALL_EXPR, except its CALL_EXPR_FN is NULL.
11415 It will get gimplified later into an ordinary internal function. */
11418 build_call_expr_internal_loc_array (location_t loc
, internal_fn ifn
,
11419 tree type
, int n
, const tree
*args
)
11421 tree t
= build_call_1 (type
, NULL_TREE
, n
);
11422 for (int i
= 0; i
< n
; ++i
)
11423 CALL_EXPR_ARG (t
, i
) = args
[i
];
11424 SET_EXPR_LOCATION (t
, loc
);
11425 CALL_EXPR_IFN (t
) = ifn
;
11429 /* Build internal call expression. This is just like CALL_EXPR, except
11430 its CALL_EXPR_FN is NULL. It will get gimplified later into ordinary
11431 internal function. */
11434 build_call_expr_internal_loc (location_t loc
, enum internal_fn ifn
,
11435 tree type
, int n
, ...)
11438 tree
*argarray
= XALLOCAVEC (tree
, n
);
11442 for (i
= 0; i
< n
; i
++)
11443 argarray
[i
] = va_arg (ap
, tree
);
11445 return build_call_expr_internal_loc_array (loc
, ifn
, type
, n
, argarray
);
11448 /* Return a function call to FN, if the target is guaranteed to support it,
11451 N is the number of arguments, passed in the "...", and TYPE is the
11452 type of the return value. */
11455 maybe_build_call_expr_loc (location_t loc
, combined_fn fn
, tree type
,
11459 tree
*argarray
= XALLOCAVEC (tree
, n
);
11463 for (i
= 0; i
< n
; i
++)
11464 argarray
[i
] = va_arg (ap
, tree
);
11466 if (internal_fn_p (fn
))
11468 internal_fn ifn
= as_internal_fn (fn
);
11469 if (direct_internal_fn_p (ifn
))
11471 tree_pair types
= direct_internal_fn_types (ifn
, type
, argarray
);
11472 if (!direct_internal_fn_supported_p (ifn
, types
,
11473 OPTIMIZE_FOR_BOTH
))
11476 return build_call_expr_internal_loc_array (loc
, ifn
, type
, n
, argarray
);
11480 tree fndecl
= builtin_decl_implicit (as_builtin_fn (fn
));
11483 return build_call_expr_loc_array (loc
, fndecl
, n
, argarray
);
11487 /* Create a new constant string literal and return a char* pointer to it.
11488 The STRING_CST value is the LEN characters at STR. */
11490 build_string_literal (int len
, const char *str
)
11492 tree t
, elem
, index
, type
;
11494 t
= build_string (len
, str
);
11495 elem
= build_type_variant (char_type_node
, 1, 0);
11496 index
= build_index_type (size_int (len
- 1));
11497 type
= build_array_type (elem
, index
);
11498 TREE_TYPE (t
) = type
;
11499 TREE_CONSTANT (t
) = 1;
11500 TREE_READONLY (t
) = 1;
11501 TREE_STATIC (t
) = 1;
11503 type
= build_pointer_type (elem
);
11504 t
= build1 (ADDR_EXPR
, type
,
11505 build4 (ARRAY_REF
, elem
,
11506 t
, integer_zero_node
, NULL_TREE
, NULL_TREE
));
11512 /* Return true if T (assumed to be a DECL) must be assigned a memory
11516 needs_to_live_in_memory (const_tree t
)
11518 return (TREE_ADDRESSABLE (t
)
11519 || is_global_var (t
)
11520 || (TREE_CODE (t
) == RESULT_DECL
11521 && !DECL_BY_REFERENCE (t
)
11522 && aggregate_value_p (t
, current_function_decl
)));
11525 /* Return value of a constant X and sign-extend it. */
11528 int_cst_value (const_tree x
)
11530 unsigned bits
= TYPE_PRECISION (TREE_TYPE (x
));
11531 unsigned HOST_WIDE_INT val
= TREE_INT_CST_LOW (x
);
11533 /* Make sure the sign-extended value will fit in a HOST_WIDE_INT. */
11534 gcc_assert (cst_and_fits_in_hwi (x
));
11536 if (bits
< HOST_BITS_PER_WIDE_INT
)
11538 bool negative
= ((val
>> (bits
- 1)) & 1) != 0;
11540 val
|= HOST_WIDE_INT_M1U
<< (bits
- 1) << 1;
11542 val
&= ~(HOST_WIDE_INT_M1U
<< (bits
- 1) << 1);
11548 /* If TYPE is an integral or pointer type, return an integer type with
11549 the same precision which is unsigned iff UNSIGNEDP is true, or itself
11550 if TYPE is already an integer type of signedness UNSIGNEDP. */
11553 signed_or_unsigned_type_for (int unsignedp
, tree type
)
11555 if (TREE_CODE (type
) == INTEGER_TYPE
&& TYPE_UNSIGNED (type
) == unsignedp
)
11558 if (TREE_CODE (type
) == VECTOR_TYPE
)
11560 tree inner
= TREE_TYPE (type
);
11561 tree inner2
= signed_or_unsigned_type_for (unsignedp
, inner
);
11564 if (inner
== inner2
)
11566 return build_vector_type (inner2
, TYPE_VECTOR_SUBPARTS (type
));
11569 if (!INTEGRAL_TYPE_P (type
)
11570 && !POINTER_TYPE_P (type
)
11571 && TREE_CODE (type
) != OFFSET_TYPE
)
11574 return build_nonstandard_integer_type (TYPE_PRECISION (type
), unsignedp
);
11577 /* If TYPE is an integral or pointer type, return an integer type with
11578 the same precision which is unsigned, or itself if TYPE is already an
11579 unsigned integer type. */
11582 unsigned_type_for (tree type
)
11584 return signed_or_unsigned_type_for (1, type
);
11587 /* If TYPE is an integral or pointer type, return an integer type with
11588 the same precision which is signed, or itself if TYPE is already a
11589 signed integer type. */
11592 signed_type_for (tree type
)
11594 return signed_or_unsigned_type_for (0, type
);
11597 /* If TYPE is a vector type, return a signed integer vector type with the
11598 same width and number of subparts. Otherwise return boolean_type_node. */
11601 truth_type_for (tree type
)
11603 if (TREE_CODE (type
) == VECTOR_TYPE
)
11605 if (VECTOR_BOOLEAN_TYPE_P (type
))
11607 return build_truth_vector_type (TYPE_VECTOR_SUBPARTS (type
),
11608 GET_MODE_SIZE (TYPE_MODE (type
)));
11611 return boolean_type_node
;
11614 /* Returns the largest value obtainable by casting something in INNER type to
11618 upper_bound_in_type (tree outer
, tree inner
)
11620 unsigned int det
= 0;
11621 unsigned oprec
= TYPE_PRECISION (outer
);
11622 unsigned iprec
= TYPE_PRECISION (inner
);
11625 /* Compute a unique number for every combination. */
11626 det
|= (oprec
> iprec
) ? 4 : 0;
11627 det
|= TYPE_UNSIGNED (outer
) ? 2 : 0;
11628 det
|= TYPE_UNSIGNED (inner
) ? 1 : 0;
11630 /* Determine the exponent to use. */
11635 /* oprec <= iprec, outer: signed, inner: don't care. */
11640 /* oprec <= iprec, outer: unsigned, inner: don't care. */
11644 /* oprec > iprec, outer: signed, inner: signed. */
11648 /* oprec > iprec, outer: signed, inner: unsigned. */
11652 /* oprec > iprec, outer: unsigned, inner: signed. */
11656 /* oprec > iprec, outer: unsigned, inner: unsigned. */
11660 gcc_unreachable ();
11663 return wide_int_to_tree (outer
,
11664 wi::mask (prec
, false, TYPE_PRECISION (outer
)));
11667 /* Returns the smallest value obtainable by casting something in INNER type to
11671 lower_bound_in_type (tree outer
, tree inner
)
11673 unsigned oprec
= TYPE_PRECISION (outer
);
11674 unsigned iprec
= TYPE_PRECISION (inner
);
11676 /* If OUTER type is unsigned, we can definitely cast 0 to OUTER type
11678 if (TYPE_UNSIGNED (outer
)
11679 /* If we are widening something of an unsigned type, OUTER type
11680 contains all values of INNER type. In particular, both INNER
11681 and OUTER types have zero in common. */
11682 || (oprec
> iprec
&& TYPE_UNSIGNED (inner
)))
11683 return build_int_cst (outer
, 0);
11686 /* If we are widening a signed type to another signed type, we
11687 want to obtain -2^^(iprec-1). If we are keeping the
11688 precision or narrowing to a signed type, we want to obtain
11690 unsigned prec
= oprec
> iprec
? iprec
: oprec
;
11691 return wide_int_to_tree (outer
,
11692 wi::mask (prec
- 1, true,
11693 TYPE_PRECISION (outer
)));
11697 /* Return nonzero if two operands that are suitable for PHI nodes are
11698 necessarily equal. Specifically, both ARG0 and ARG1 must be either
11699 SSA_NAME or invariant. Note that this is strictly an optimization.
11700 That is, callers of this function can directly call operand_equal_p
11701 and get the same result, only slower. */
11704 operand_equal_for_phi_arg_p (const_tree arg0
, const_tree arg1
)
11708 if (TREE_CODE (arg0
) == SSA_NAME
|| TREE_CODE (arg1
) == SSA_NAME
)
11710 return operand_equal_p (arg0
, arg1
, 0);
11713 /* Returns number of zeros at the end of binary representation of X. */
11716 num_ending_zeros (const_tree x
)
11718 return build_int_cst (TREE_TYPE (x
), wi::ctz (x
));
11722 #define WALK_SUBTREE(NODE) \
11725 result = walk_tree_1 (&(NODE), func, data, pset, lh); \
11731 /* This is a subroutine of walk_tree that walks field of TYPE that are to
11732 be walked whenever a type is seen in the tree. Rest of operands and return
11733 value are as for walk_tree. */
11736 walk_type_fields (tree type
, walk_tree_fn func
, void *data
,
11737 hash_set
<tree
> *pset
, walk_tree_lh lh
)
11739 tree result
= NULL_TREE
;
11741 switch (TREE_CODE (type
))
11744 case REFERENCE_TYPE
:
11746 /* We have to worry about mutually recursive pointers. These can't
11747 be written in C. They can in Ada. It's pathological, but
11748 there's an ACATS test (c38102a) that checks it. Deal with this
11749 by checking if we're pointing to another pointer, that one
11750 points to another pointer, that one does too, and we have no htab.
11751 If so, get a hash table. We check three levels deep to avoid
11752 the cost of the hash table if we don't need one. */
11753 if (POINTER_TYPE_P (TREE_TYPE (type
))
11754 && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (type
)))
11755 && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (TREE_TYPE (type
))))
11758 result
= walk_tree_without_duplicates (&TREE_TYPE (type
),
11769 WALK_SUBTREE (TREE_TYPE (type
));
11773 WALK_SUBTREE (TYPE_METHOD_BASETYPE (type
));
11775 /* Fall through. */
11777 case FUNCTION_TYPE
:
11778 WALK_SUBTREE (TREE_TYPE (type
));
11782 /* We never want to walk into default arguments. */
11783 for (arg
= TYPE_ARG_TYPES (type
); arg
; arg
= TREE_CHAIN (arg
))
11784 WALK_SUBTREE (TREE_VALUE (arg
));
11789 /* Don't follow this nodes's type if a pointer for fear that
11790 we'll have infinite recursion. If we have a PSET, then we
11793 || (!POINTER_TYPE_P (TREE_TYPE (type
))
11794 && TREE_CODE (TREE_TYPE (type
)) != OFFSET_TYPE
))
11795 WALK_SUBTREE (TREE_TYPE (type
));
11796 WALK_SUBTREE (TYPE_DOMAIN (type
));
11800 WALK_SUBTREE (TREE_TYPE (type
));
11801 WALK_SUBTREE (TYPE_OFFSET_BASETYPE (type
));
11811 /* Apply FUNC to all the sub-trees of TP in a pre-order traversal. FUNC is
11812 called with the DATA and the address of each sub-tree. If FUNC returns a
11813 non-NULL value, the traversal is stopped, and the value returned by FUNC
11814 is returned. If PSET is non-NULL it is used to record the nodes visited,
11815 and to avoid visiting a node more than once. */
11818 walk_tree_1 (tree
*tp
, walk_tree_fn func
, void *data
,
11819 hash_set
<tree
> *pset
, walk_tree_lh lh
)
11821 enum tree_code code
;
11825 #define WALK_SUBTREE_TAIL(NODE) \
11829 goto tail_recurse; \
11834 /* Skip empty subtrees. */
11838 /* Don't walk the same tree twice, if the user has requested
11839 that we avoid doing so. */
11840 if (pset
&& pset
->add (*tp
))
11843 /* Call the function. */
11845 result
= (*func
) (tp
, &walk_subtrees
, data
);
11847 /* If we found something, return it. */
11851 code
= TREE_CODE (*tp
);
11853 /* Even if we didn't, FUNC may have decided that there was nothing
11854 interesting below this point in the tree. */
11855 if (!walk_subtrees
)
11857 /* But we still need to check our siblings. */
11858 if (code
== TREE_LIST
)
11859 WALK_SUBTREE_TAIL (TREE_CHAIN (*tp
));
11860 else if (code
== OMP_CLAUSE
)
11861 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
11868 result
= (*lh
) (tp
, &walk_subtrees
, func
, data
, pset
);
11869 if (result
|| !walk_subtrees
)
11876 case IDENTIFIER_NODE
:
11883 case PLACEHOLDER_EXPR
:
11887 /* None of these have subtrees other than those already walked
11892 WALK_SUBTREE (TREE_VALUE (*tp
));
11893 WALK_SUBTREE_TAIL (TREE_CHAIN (*tp
));
11898 int len
= TREE_VEC_LENGTH (*tp
);
11903 /* Walk all elements but the first. */
11905 WALK_SUBTREE (TREE_VEC_ELT (*tp
, len
));
11907 /* Now walk the first one as a tail call. */
11908 WALK_SUBTREE_TAIL (TREE_VEC_ELT (*tp
, 0));
11912 WALK_SUBTREE (TREE_REALPART (*tp
));
11913 WALK_SUBTREE_TAIL (TREE_IMAGPART (*tp
));
11917 unsigned HOST_WIDE_INT idx
;
11918 constructor_elt
*ce
;
11920 for (idx
= 0; vec_safe_iterate (CONSTRUCTOR_ELTS (*tp
), idx
, &ce
);
11922 WALK_SUBTREE (ce
->value
);
11927 WALK_SUBTREE_TAIL (TREE_OPERAND (*tp
, 0));
11932 for (decl
= BIND_EXPR_VARS (*tp
); decl
; decl
= DECL_CHAIN (decl
))
11934 /* Walk the DECL_INITIAL and DECL_SIZE. We don't want to walk
11935 into declarations that are just mentioned, rather than
11936 declared; they don't really belong to this part of the tree.
11937 And, we can see cycles: the initializer for a declaration
11938 can refer to the declaration itself. */
11939 WALK_SUBTREE (DECL_INITIAL (decl
));
11940 WALK_SUBTREE (DECL_SIZE (decl
));
11941 WALK_SUBTREE (DECL_SIZE_UNIT (decl
));
11943 WALK_SUBTREE_TAIL (BIND_EXPR_BODY (*tp
));
11946 case STATEMENT_LIST
:
11948 tree_stmt_iterator i
;
11949 for (i
= tsi_start (*tp
); !tsi_end_p (i
); tsi_next (&i
))
11950 WALK_SUBTREE (*tsi_stmt_ptr (i
));
11955 switch (OMP_CLAUSE_CODE (*tp
))
11957 case OMP_CLAUSE_GANG
:
11958 case OMP_CLAUSE__GRIDDIM_
:
11959 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, 1));
11962 case OMP_CLAUSE_ASYNC
:
11963 case OMP_CLAUSE_WAIT
:
11964 case OMP_CLAUSE_WORKER
:
11965 case OMP_CLAUSE_VECTOR
:
11966 case OMP_CLAUSE_NUM_GANGS
:
11967 case OMP_CLAUSE_NUM_WORKERS
:
11968 case OMP_CLAUSE_VECTOR_LENGTH
:
11969 case OMP_CLAUSE_PRIVATE
:
11970 case OMP_CLAUSE_SHARED
:
11971 case OMP_CLAUSE_FIRSTPRIVATE
:
11972 case OMP_CLAUSE_COPYIN
:
11973 case OMP_CLAUSE_COPYPRIVATE
:
11974 case OMP_CLAUSE_FINAL
:
11975 case OMP_CLAUSE_IF
:
11976 case OMP_CLAUSE_NUM_THREADS
:
11977 case OMP_CLAUSE_SCHEDULE
:
11978 case OMP_CLAUSE_UNIFORM
:
11979 case OMP_CLAUSE_DEPEND
:
11980 case OMP_CLAUSE_NUM_TEAMS
:
11981 case OMP_CLAUSE_THREAD_LIMIT
:
11982 case OMP_CLAUSE_DEVICE
:
11983 case OMP_CLAUSE_DIST_SCHEDULE
:
11984 case OMP_CLAUSE_SAFELEN
:
11985 case OMP_CLAUSE_SIMDLEN
:
11986 case OMP_CLAUSE_ORDERED
:
11987 case OMP_CLAUSE_PRIORITY
:
11988 case OMP_CLAUSE_GRAINSIZE
:
11989 case OMP_CLAUSE_NUM_TASKS
:
11990 case OMP_CLAUSE_HINT
:
11991 case OMP_CLAUSE_TO_DECLARE
:
11992 case OMP_CLAUSE_LINK
:
11993 case OMP_CLAUSE_USE_DEVICE_PTR
:
11994 case OMP_CLAUSE_IS_DEVICE_PTR
:
11995 case OMP_CLAUSE__LOOPTEMP_
:
11996 case OMP_CLAUSE__SIMDUID_
:
11997 case OMP_CLAUSE__CILK_FOR_COUNT_
:
11998 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, 0));
12001 case OMP_CLAUSE_INDEPENDENT
:
12002 case OMP_CLAUSE_NOWAIT
:
12003 case OMP_CLAUSE_DEFAULT
:
12004 case OMP_CLAUSE_UNTIED
:
12005 case OMP_CLAUSE_MERGEABLE
:
12006 case OMP_CLAUSE_PROC_BIND
:
12007 case OMP_CLAUSE_INBRANCH
:
12008 case OMP_CLAUSE_NOTINBRANCH
:
12009 case OMP_CLAUSE_FOR
:
12010 case OMP_CLAUSE_PARALLEL
:
12011 case OMP_CLAUSE_SECTIONS
:
12012 case OMP_CLAUSE_TASKGROUP
:
12013 case OMP_CLAUSE_NOGROUP
:
12014 case OMP_CLAUSE_THREADS
:
12015 case OMP_CLAUSE_SIMD
:
12016 case OMP_CLAUSE_DEFAULTMAP
:
12017 case OMP_CLAUSE_AUTO
:
12018 case OMP_CLAUSE_SEQ
:
12019 case OMP_CLAUSE_TILE
:
12020 case OMP_CLAUSE__SIMT_
:
12021 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
12023 case OMP_CLAUSE_LASTPRIVATE
:
12024 WALK_SUBTREE (OMP_CLAUSE_DECL (*tp
));
12025 WALK_SUBTREE (OMP_CLAUSE_LASTPRIVATE_STMT (*tp
));
12026 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
12028 case OMP_CLAUSE_COLLAPSE
:
12031 for (i
= 0; i
< 3; i
++)
12032 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, i
));
12033 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
12036 case OMP_CLAUSE_LINEAR
:
12037 WALK_SUBTREE (OMP_CLAUSE_DECL (*tp
));
12038 WALK_SUBTREE (OMP_CLAUSE_LINEAR_STEP (*tp
));
12039 WALK_SUBTREE (OMP_CLAUSE_LINEAR_STMT (*tp
));
12040 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
12042 case OMP_CLAUSE_ALIGNED
:
12043 case OMP_CLAUSE_FROM
:
12044 case OMP_CLAUSE_TO
:
12045 case OMP_CLAUSE_MAP
:
12046 case OMP_CLAUSE__CACHE_
:
12047 WALK_SUBTREE (OMP_CLAUSE_DECL (*tp
));
12048 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, 1));
12049 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
12051 case OMP_CLAUSE_REDUCTION
:
12054 for (i
= 0; i
< 5; i
++)
12055 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, i
));
12056 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
12060 gcc_unreachable ();
12068 /* TARGET_EXPRs are peculiar: operands 1 and 3 can be the same.
12069 But, we only want to walk once. */
12070 len
= (TREE_OPERAND (*tp
, 3) == TREE_OPERAND (*tp
, 1)) ? 2 : 3;
12071 for (i
= 0; i
< len
; ++i
)
12072 WALK_SUBTREE (TREE_OPERAND (*tp
, i
));
12073 WALK_SUBTREE_TAIL (TREE_OPERAND (*tp
, len
));
12077 /* If this is a TYPE_DECL, walk into the fields of the type that it's
12078 defining. We only want to walk into these fields of a type in this
12079 case and not in the general case of a mere reference to the type.
12081 The criterion is as follows: if the field can be an expression, it
12082 must be walked only here. This should be in keeping with the fields
12083 that are directly gimplified in gimplify_type_sizes in order for the
12084 mark/copy-if-shared/unmark machinery of the gimplifier to work with
12085 variable-sized types.
12087 Note that DECLs get walked as part of processing the BIND_EXPR. */
12088 if (TREE_CODE (DECL_EXPR_DECL (*tp
)) == TYPE_DECL
)
12090 tree
*type_p
= &TREE_TYPE (DECL_EXPR_DECL (*tp
));
12091 if (TREE_CODE (*type_p
) == ERROR_MARK
)
12094 /* Call the function for the type. See if it returns anything or
12095 doesn't want us to continue. If we are to continue, walk both
12096 the normal fields and those for the declaration case. */
12097 result
= (*func
) (type_p
, &walk_subtrees
, data
);
12098 if (result
|| !walk_subtrees
)
12101 /* But do not walk a pointed-to type since it may itself need to
12102 be walked in the declaration case if it isn't anonymous. */
12103 if (!POINTER_TYPE_P (*type_p
))
12105 result
= walk_type_fields (*type_p
, func
, data
, pset
, lh
);
12110 /* If this is a record type, also walk the fields. */
12111 if (RECORD_OR_UNION_TYPE_P (*type_p
))
12115 for (field
= TYPE_FIELDS (*type_p
); field
;
12116 field
= DECL_CHAIN (field
))
12118 /* We'd like to look at the type of the field, but we can
12119 easily get infinite recursion. So assume it's pointed
12120 to elsewhere in the tree. Also, ignore things that
12122 if (TREE_CODE (field
) != FIELD_DECL
)
12125 WALK_SUBTREE (DECL_FIELD_OFFSET (field
));
12126 WALK_SUBTREE (DECL_SIZE (field
));
12127 WALK_SUBTREE (DECL_SIZE_UNIT (field
));
12128 if (TREE_CODE (*type_p
) == QUAL_UNION_TYPE
)
12129 WALK_SUBTREE (DECL_QUALIFIER (field
));
12133 /* Same for scalar types. */
12134 else if (TREE_CODE (*type_p
) == BOOLEAN_TYPE
12135 || TREE_CODE (*type_p
) == ENUMERAL_TYPE
12136 || TREE_CODE (*type_p
) == INTEGER_TYPE
12137 || TREE_CODE (*type_p
) == FIXED_POINT_TYPE
12138 || TREE_CODE (*type_p
) == REAL_TYPE
)
12140 WALK_SUBTREE (TYPE_MIN_VALUE (*type_p
));
12141 WALK_SUBTREE (TYPE_MAX_VALUE (*type_p
));
12144 WALK_SUBTREE (TYPE_SIZE (*type_p
));
12145 WALK_SUBTREE_TAIL (TYPE_SIZE_UNIT (*type_p
));
12150 if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code
)))
12154 /* Walk over all the sub-trees of this operand. */
12155 len
= TREE_OPERAND_LENGTH (*tp
);
12157 /* Go through the subtrees. We need to do this in forward order so
12158 that the scope of a FOR_EXPR is handled properly. */
12161 for (i
= 0; i
< len
- 1; ++i
)
12162 WALK_SUBTREE (TREE_OPERAND (*tp
, i
));
12163 WALK_SUBTREE_TAIL (TREE_OPERAND (*tp
, len
- 1));
12166 /* If this is a type, walk the needed fields in the type. */
12167 else if (TYPE_P (*tp
))
12168 return walk_type_fields (*tp
, func
, data
, pset
, lh
);
12172 /* We didn't find what we were looking for. */
12175 #undef WALK_SUBTREE_TAIL
12177 #undef WALK_SUBTREE
12179 /* Like walk_tree, but does not walk duplicate nodes more than once. */
12182 walk_tree_without_duplicates_1 (tree
*tp
, walk_tree_fn func
, void *data
,
12187 hash_set
<tree
> pset
;
12188 result
= walk_tree_1 (tp
, func
, data
, &pset
, lh
);
12194 tree_block (tree t
)
12196 const enum tree_code_class c
= TREE_CODE_CLASS (TREE_CODE (t
));
12198 if (IS_EXPR_CODE_CLASS (c
))
12199 return LOCATION_BLOCK (t
->exp
.locus
);
12200 gcc_unreachable ();
12205 tree_set_block (tree t
, tree b
)
12207 const enum tree_code_class c
= TREE_CODE_CLASS (TREE_CODE (t
));
12209 if (IS_EXPR_CODE_CLASS (c
))
12211 t
->exp
.locus
= set_block (t
->exp
.locus
, b
);
12214 gcc_unreachable ();
12217 /* Create a nameless artificial label and put it in the current
12218 function context. The label has a location of LOC. Returns the
12219 newly created label. */
12222 create_artificial_label (location_t loc
)
12224 tree lab
= build_decl (loc
,
12225 LABEL_DECL
, NULL_TREE
, void_type_node
);
12227 DECL_ARTIFICIAL (lab
) = 1;
12228 DECL_IGNORED_P (lab
) = 1;
12229 DECL_CONTEXT (lab
) = current_function_decl
;
12233 /* Given a tree, try to return a useful variable name that we can use
12234 to prefix a temporary that is being assigned the value of the tree.
12235 I.E. given <temp> = &A, return A. */
12240 tree stripped_decl
;
12243 STRIP_NOPS (stripped_decl
);
12244 if (DECL_P (stripped_decl
) && DECL_NAME (stripped_decl
))
12245 return IDENTIFIER_POINTER (DECL_NAME (stripped_decl
));
12246 else if (TREE_CODE (stripped_decl
) == SSA_NAME
)
12248 tree name
= SSA_NAME_IDENTIFIER (stripped_decl
);
12251 return IDENTIFIER_POINTER (name
);
12255 switch (TREE_CODE (stripped_decl
))
12258 return get_name (TREE_OPERAND (stripped_decl
, 0));
12265 /* Return true if TYPE has a variable argument list. */
12268 stdarg_p (const_tree fntype
)
12270 function_args_iterator args_iter
;
12271 tree n
= NULL_TREE
, t
;
12276 FOREACH_FUNCTION_ARGS (fntype
, t
, args_iter
)
12281 return n
!= NULL_TREE
&& n
!= void_type_node
;
12284 /* Return true if TYPE has a prototype. */
12287 prototype_p (const_tree fntype
)
12291 gcc_assert (fntype
!= NULL_TREE
);
12293 t
= TYPE_ARG_TYPES (fntype
);
12294 return (t
!= NULL_TREE
);
12297 /* If BLOCK is inlined from an __attribute__((__artificial__))
12298 routine, return pointer to location from where it has been
12301 block_nonartificial_location (tree block
)
12303 location_t
*ret
= NULL
;
12305 while (block
&& TREE_CODE (block
) == BLOCK
12306 && BLOCK_ABSTRACT_ORIGIN (block
))
12308 tree ao
= BLOCK_ABSTRACT_ORIGIN (block
);
12310 while (TREE_CODE (ao
) == BLOCK
12311 && BLOCK_ABSTRACT_ORIGIN (ao
)
12312 && BLOCK_ABSTRACT_ORIGIN (ao
) != ao
)
12313 ao
= BLOCK_ABSTRACT_ORIGIN (ao
);
12315 if (TREE_CODE (ao
) == FUNCTION_DECL
)
12317 /* If AO is an artificial inline, point RET to the
12318 call site locus at which it has been inlined and continue
12319 the loop, in case AO's caller is also an artificial
12321 if (DECL_DECLARED_INLINE_P (ao
)
12322 && lookup_attribute ("artificial", DECL_ATTRIBUTES (ao
)))
12323 ret
= &BLOCK_SOURCE_LOCATION (block
);
12327 else if (TREE_CODE (ao
) != BLOCK
)
12330 block
= BLOCK_SUPERCONTEXT (block
);
12336 /* If EXP is inlined from an __attribute__((__artificial__))
12337 function, return the location of the original call expression. */
12340 tree_nonartificial_location (tree exp
)
12342 location_t
*loc
= block_nonartificial_location (TREE_BLOCK (exp
));
12347 return EXPR_LOCATION (exp
);
12351 /* These are the hash table functions for the hash table of OPTIMIZATION_NODEq
12354 /* Return the hash code X, an OPTIMIZATION_NODE or TARGET_OPTION code. */
12357 cl_option_hasher::hash (tree x
)
12359 const_tree
const t
= x
;
12363 hashval_t hash
= 0;
12365 if (TREE_CODE (t
) == OPTIMIZATION_NODE
)
12367 p
= (const char *)TREE_OPTIMIZATION (t
);
12368 len
= sizeof (struct cl_optimization
);
12371 else if (TREE_CODE (t
) == TARGET_OPTION_NODE
)
12372 return cl_target_option_hash (TREE_TARGET_OPTION (t
));
12375 gcc_unreachable ();
12377 /* assume most opt flags are just 0/1, some are 2-3, and a few might be
12379 for (i
= 0; i
< len
; i
++)
12381 hash
= (hash
<< 4) ^ ((i
<< 2) | p
[i
]);
12386 /* Return nonzero if the value represented by *X (an OPTIMIZATION or
12387 TARGET_OPTION tree node) is the same as that given by *Y, which is the
12391 cl_option_hasher::equal (tree x
, tree y
)
12393 const_tree
const xt
= x
;
12394 const_tree
const yt
= y
;
12399 if (TREE_CODE (xt
) != TREE_CODE (yt
))
12402 if (TREE_CODE (xt
) == OPTIMIZATION_NODE
)
12404 xp
= (const char *)TREE_OPTIMIZATION (xt
);
12405 yp
= (const char *)TREE_OPTIMIZATION (yt
);
12406 len
= sizeof (struct cl_optimization
);
12409 else if (TREE_CODE (xt
) == TARGET_OPTION_NODE
)
12411 return cl_target_option_eq (TREE_TARGET_OPTION (xt
),
12412 TREE_TARGET_OPTION (yt
));
12416 gcc_unreachable ();
12418 return (memcmp (xp
, yp
, len
) == 0);
12421 /* Build an OPTIMIZATION_NODE based on the options in OPTS. */
12424 build_optimization_node (struct gcc_options
*opts
)
12428 /* Use the cache of optimization nodes. */
12430 cl_optimization_save (TREE_OPTIMIZATION (cl_optimization_node
),
12433 tree
*slot
= cl_option_hash_table
->find_slot (cl_optimization_node
, INSERT
);
12437 /* Insert this one into the hash table. */
12438 t
= cl_optimization_node
;
12441 /* Make a new node for next time round. */
12442 cl_optimization_node
= make_node (OPTIMIZATION_NODE
);
12448 /* Build a TARGET_OPTION_NODE based on the options in OPTS. */
12451 build_target_option_node (struct gcc_options
*opts
)
12455 /* Use the cache of optimization nodes. */
12457 cl_target_option_save (TREE_TARGET_OPTION (cl_target_option_node
),
12460 tree
*slot
= cl_option_hash_table
->find_slot (cl_target_option_node
, INSERT
);
12464 /* Insert this one into the hash table. */
12465 t
= cl_target_option_node
;
12468 /* Make a new node for next time round. */
12469 cl_target_option_node
= make_node (TARGET_OPTION_NODE
);
12475 /* Clear TREE_TARGET_GLOBALS of all TARGET_OPTION_NODE trees,
12476 so that they aren't saved during PCH writing. */
12479 prepare_target_option_nodes_for_pch (void)
12481 hash_table
<cl_option_hasher
>::iterator iter
= cl_option_hash_table
->begin ();
12482 for (; iter
!= cl_option_hash_table
->end (); ++iter
)
12483 if (TREE_CODE (*iter
) == TARGET_OPTION_NODE
)
12484 TREE_TARGET_GLOBALS (*iter
) = NULL
;
12487 /* Determine the "ultimate origin" of a block. The block may be an inlined
12488 instance of an inlined instance of a block which is local to an inline
12489 function, so we have to trace all of the way back through the origin chain
12490 to find out what sort of node actually served as the original seed for the
12494 block_ultimate_origin (const_tree block
)
12496 tree immediate_origin
= BLOCK_ABSTRACT_ORIGIN (block
);
12498 /* BLOCK_ABSTRACT_ORIGIN can point to itself; ignore that if
12499 we're trying to output the abstract instance of this function. */
12500 if (BLOCK_ABSTRACT (block
) && immediate_origin
== block
)
12503 if (immediate_origin
== NULL_TREE
)
12508 tree lookahead
= immediate_origin
;
12512 ret_val
= lookahead
;
12513 lookahead
= (TREE_CODE (ret_val
) == BLOCK
12514 ? BLOCK_ABSTRACT_ORIGIN (ret_val
) : NULL
);
12516 while (lookahead
!= NULL
&& lookahead
!= ret_val
);
12518 /* The block's abstract origin chain may not be the *ultimate* origin of
12519 the block. It could lead to a DECL that has an abstract origin set.
12520 If so, we want that DECL's abstract origin (which is what DECL_ORIGIN
12521 will give us if it has one). Note that DECL's abstract origins are
12522 supposed to be the most distant ancestor (or so decl_ultimate_origin
12523 claims), so we don't need to loop following the DECL origins. */
12524 if (DECL_P (ret_val
))
12525 return DECL_ORIGIN (ret_val
);
12531 /* Return true iff conversion from INNER_TYPE to OUTER_TYPE generates
12535 tree_nop_conversion_p (const_tree outer_type
, const_tree inner_type
)
12537 /* Do not strip casts into or out of differing address spaces. */
12538 if (POINTER_TYPE_P (outer_type
)
12539 && TYPE_ADDR_SPACE (TREE_TYPE (outer_type
)) != ADDR_SPACE_GENERIC
)
12541 if (!POINTER_TYPE_P (inner_type
)
12542 || (TYPE_ADDR_SPACE (TREE_TYPE (outer_type
))
12543 != TYPE_ADDR_SPACE (TREE_TYPE (inner_type
))))
12546 else if (POINTER_TYPE_P (inner_type
)
12547 && TYPE_ADDR_SPACE (TREE_TYPE (inner_type
)) != ADDR_SPACE_GENERIC
)
12549 /* We already know that outer_type is not a pointer with
12550 a non-generic address space. */
12554 /* Use precision rather then machine mode when we can, which gives
12555 the correct answer even for submode (bit-field) types. */
12556 if ((INTEGRAL_TYPE_P (outer_type
)
12557 || POINTER_TYPE_P (outer_type
)
12558 || TREE_CODE (outer_type
) == OFFSET_TYPE
)
12559 && (INTEGRAL_TYPE_P (inner_type
)
12560 || POINTER_TYPE_P (inner_type
)
12561 || TREE_CODE (inner_type
) == OFFSET_TYPE
))
12562 return TYPE_PRECISION (outer_type
) == TYPE_PRECISION (inner_type
);
12564 /* Otherwise fall back on comparing machine modes (e.g. for
12565 aggregate types, floats). */
12566 return TYPE_MODE (outer_type
) == TYPE_MODE (inner_type
);
12569 /* Return true iff conversion in EXP generates no instruction. Mark
12570 it inline so that we fully inline into the stripping functions even
12571 though we have two uses of this function. */
12574 tree_nop_conversion (const_tree exp
)
12576 tree outer_type
, inner_type
;
12578 if (!CONVERT_EXPR_P (exp
)
12579 && TREE_CODE (exp
) != NON_LVALUE_EXPR
)
12581 if (TREE_OPERAND (exp
, 0) == error_mark_node
)
12584 outer_type
= TREE_TYPE (exp
);
12585 inner_type
= TREE_TYPE (TREE_OPERAND (exp
, 0));
12590 return tree_nop_conversion_p (outer_type
, inner_type
);
12593 /* Return true iff conversion in EXP generates no instruction. Don't
12594 consider conversions changing the signedness. */
12597 tree_sign_nop_conversion (const_tree exp
)
12599 tree outer_type
, inner_type
;
12601 if (!tree_nop_conversion (exp
))
12604 outer_type
= TREE_TYPE (exp
);
12605 inner_type
= TREE_TYPE (TREE_OPERAND (exp
, 0));
12607 return (TYPE_UNSIGNED (outer_type
) == TYPE_UNSIGNED (inner_type
)
12608 && POINTER_TYPE_P (outer_type
) == POINTER_TYPE_P (inner_type
));
12611 /* Strip conversions from EXP according to tree_nop_conversion and
12612 return the resulting expression. */
12615 tree_strip_nop_conversions (tree exp
)
12617 while (tree_nop_conversion (exp
))
12618 exp
= TREE_OPERAND (exp
, 0);
12622 /* Strip conversions from EXP according to tree_sign_nop_conversion
12623 and return the resulting expression. */
12626 tree_strip_sign_nop_conversions (tree exp
)
12628 while (tree_sign_nop_conversion (exp
))
12629 exp
= TREE_OPERAND (exp
, 0);
12633 /* Avoid any floating point extensions from EXP. */
12635 strip_float_extensions (tree exp
)
12637 tree sub
, expt
, subt
;
12639 /* For floating point constant look up the narrowest type that can hold
12640 it properly and handle it like (type)(narrowest_type)constant.
12641 This way we can optimize for instance a=a*2.0 where "a" is float
12642 but 2.0 is double constant. */
12643 if (TREE_CODE (exp
) == REAL_CST
&& !DECIMAL_FLOAT_TYPE_P (TREE_TYPE (exp
)))
12645 REAL_VALUE_TYPE orig
;
12648 orig
= TREE_REAL_CST (exp
);
12649 if (TYPE_PRECISION (TREE_TYPE (exp
)) > TYPE_PRECISION (float_type_node
)
12650 && exact_real_truncate (TYPE_MODE (float_type_node
), &orig
))
12651 type
= float_type_node
;
12652 else if (TYPE_PRECISION (TREE_TYPE (exp
))
12653 > TYPE_PRECISION (double_type_node
)
12654 && exact_real_truncate (TYPE_MODE (double_type_node
), &orig
))
12655 type
= double_type_node
;
12657 return build_real_truncate (type
, orig
);
12660 if (!CONVERT_EXPR_P (exp
))
12663 sub
= TREE_OPERAND (exp
, 0);
12664 subt
= TREE_TYPE (sub
);
12665 expt
= TREE_TYPE (exp
);
12667 if (!FLOAT_TYPE_P (subt
))
12670 if (DECIMAL_FLOAT_TYPE_P (expt
) != DECIMAL_FLOAT_TYPE_P (subt
))
12673 if (TYPE_PRECISION (subt
) > TYPE_PRECISION (expt
))
12676 return strip_float_extensions (sub
);
12679 /* Strip out all handled components that produce invariant
12683 strip_invariant_refs (const_tree op
)
12685 while (handled_component_p (op
))
12687 switch (TREE_CODE (op
))
12690 case ARRAY_RANGE_REF
:
12691 if (!is_gimple_constant (TREE_OPERAND (op
, 1))
12692 || TREE_OPERAND (op
, 2) != NULL_TREE
12693 || TREE_OPERAND (op
, 3) != NULL_TREE
)
12697 case COMPONENT_REF
:
12698 if (TREE_OPERAND (op
, 2) != NULL_TREE
)
12704 op
= TREE_OPERAND (op
, 0);
12710 static GTY(()) tree gcc_eh_personality_decl
;
12712 /* Return the GCC personality function decl. */
12715 lhd_gcc_personality (void)
12717 if (!gcc_eh_personality_decl
)
12718 gcc_eh_personality_decl
= build_personality_function ("gcc");
12719 return gcc_eh_personality_decl
;
12722 /* TARGET is a call target of GIMPLE call statement
12723 (obtained by gimple_call_fn). Return true if it is
12724 OBJ_TYPE_REF representing an virtual call of C++ method.
12725 (As opposed to OBJ_TYPE_REF representing objc calls
12726 through a cast where middle-end devirtualization machinery
12730 virtual_method_call_p (const_tree target
)
12732 if (TREE_CODE (target
) != OBJ_TYPE_REF
)
12734 tree t
= TREE_TYPE (target
);
12735 gcc_checking_assert (TREE_CODE (t
) == POINTER_TYPE
);
12737 if (TREE_CODE (t
) == FUNCTION_TYPE
)
12739 gcc_checking_assert (TREE_CODE (t
) == METHOD_TYPE
);
12740 /* If we do not have BINFO associated, it means that type was built
12741 without devirtualization enabled. Do not consider this a virtual
12743 if (!TYPE_BINFO (obj_type_ref_class (target
)))
12748 /* REF is OBJ_TYPE_REF, return the class the ref corresponds to. */
12751 obj_type_ref_class (const_tree ref
)
12753 gcc_checking_assert (TREE_CODE (ref
) == OBJ_TYPE_REF
);
12754 ref
= TREE_TYPE (ref
);
12755 gcc_checking_assert (TREE_CODE (ref
) == POINTER_TYPE
);
12756 ref
= TREE_TYPE (ref
);
12757 /* We look for type THIS points to. ObjC also builds
12758 OBJ_TYPE_REF with non-method calls, Their first parameter
12759 ID however also corresponds to class type. */
12760 gcc_checking_assert (TREE_CODE (ref
) == METHOD_TYPE
12761 || TREE_CODE (ref
) == FUNCTION_TYPE
);
12762 ref
= TREE_VALUE (TYPE_ARG_TYPES (ref
));
12763 gcc_checking_assert (TREE_CODE (ref
) == POINTER_TYPE
);
12764 return TREE_TYPE (ref
);
12767 /* Lookup sub-BINFO of BINFO of TYPE at offset POS. */
12770 lookup_binfo_at_offset (tree binfo
, tree type
, HOST_WIDE_INT pos
)
12773 tree base_binfo
, b
;
12775 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12776 if (pos
== tree_to_shwi (BINFO_OFFSET (base_binfo
))
12777 && types_same_for_odr (TREE_TYPE (base_binfo
), type
))
12779 else if ((b
= lookup_binfo_at_offset (base_binfo
, type
, pos
)) != NULL
)
12784 /* Try to find a base info of BINFO that would have its field decl at offset
12785 OFFSET within the BINFO type and which is of EXPECTED_TYPE. If it can be
12786 found, return, otherwise return NULL_TREE. */
12789 get_binfo_at_offset (tree binfo
, HOST_WIDE_INT offset
, tree expected_type
)
12791 tree type
= BINFO_TYPE (binfo
);
12795 HOST_WIDE_INT pos
, size
;
12799 if (types_same_for_odr (type
, expected_type
))
12804 for (fld
= TYPE_FIELDS (type
); fld
; fld
= DECL_CHAIN (fld
))
12806 if (TREE_CODE (fld
) != FIELD_DECL
|| !DECL_ARTIFICIAL (fld
))
12809 pos
= int_bit_position (fld
);
12810 size
= tree_to_uhwi (DECL_SIZE (fld
));
12811 if (pos
<= offset
&& (pos
+ size
) > offset
)
12814 if (!fld
|| TREE_CODE (TREE_TYPE (fld
)) != RECORD_TYPE
)
12817 /* Offset 0 indicates the primary base, whose vtable contents are
12818 represented in the binfo for the derived class. */
12819 else if (offset
!= 0)
12821 tree found_binfo
= NULL
, base_binfo
;
12822 /* Offsets in BINFO are in bytes relative to the whole structure
12823 while POS is in bits relative to the containing field. */
12824 int binfo_offset
= (tree_to_shwi (BINFO_OFFSET (binfo
)) + pos
12827 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
12828 if (tree_to_shwi (BINFO_OFFSET (base_binfo
)) == binfo_offset
12829 && types_same_for_odr (TREE_TYPE (base_binfo
), TREE_TYPE (fld
)))
12831 found_binfo
= base_binfo
;
12835 binfo
= found_binfo
;
12837 binfo
= lookup_binfo_at_offset (binfo
, TREE_TYPE (fld
),
12841 type
= TREE_TYPE (fld
);
12846 /* Returns true if X is a typedef decl. */
12849 is_typedef_decl (const_tree x
)
12851 return (x
&& TREE_CODE (x
) == TYPE_DECL
12852 && DECL_ORIGINAL_TYPE (x
) != NULL_TREE
);
12855 /* Returns true iff TYPE is a type variant created for a typedef. */
12858 typedef_variant_p (const_tree type
)
12860 return is_typedef_decl (TYPE_NAME (type
));
12863 /* Warn about a use of an identifier which was marked deprecated. */
12865 warn_deprecated_use (tree node
, tree attr
)
12869 if (node
== 0 || !warn_deprecated_decl
)
12875 attr
= DECL_ATTRIBUTES (node
);
12876 else if (TYPE_P (node
))
12878 tree decl
= TYPE_STUB_DECL (node
);
12880 attr
= lookup_attribute ("deprecated",
12881 TYPE_ATTRIBUTES (TREE_TYPE (decl
)));
12886 attr
= lookup_attribute ("deprecated", attr
);
12889 msg
= TREE_STRING_POINTER (TREE_VALUE (TREE_VALUE (attr
)));
12897 w
= warning (OPT_Wdeprecated_declarations
,
12898 "%qD is deprecated: %s", node
, msg
);
12900 w
= warning (OPT_Wdeprecated_declarations
,
12901 "%qD is deprecated", node
);
12903 inform (DECL_SOURCE_LOCATION (node
), "declared here");
12905 else if (TYPE_P (node
))
12907 tree what
= NULL_TREE
;
12908 tree decl
= TYPE_STUB_DECL (node
);
12910 if (TYPE_NAME (node
))
12912 if (TREE_CODE (TYPE_NAME (node
)) == IDENTIFIER_NODE
)
12913 what
= TYPE_NAME (node
);
12914 else if (TREE_CODE (TYPE_NAME (node
)) == TYPE_DECL
12915 && DECL_NAME (TYPE_NAME (node
)))
12916 what
= DECL_NAME (TYPE_NAME (node
));
12924 w
= warning (OPT_Wdeprecated_declarations
,
12925 "%qE is deprecated: %s", what
, msg
);
12927 w
= warning (OPT_Wdeprecated_declarations
,
12928 "%qE is deprecated", what
);
12933 w
= warning (OPT_Wdeprecated_declarations
,
12934 "type is deprecated: %s", msg
);
12936 w
= warning (OPT_Wdeprecated_declarations
,
12937 "type is deprecated");
12940 inform (DECL_SOURCE_LOCATION (decl
), "declared here");
12947 warning (OPT_Wdeprecated_declarations
, "%qE is deprecated: %s",
12950 warning (OPT_Wdeprecated_declarations
, "%qE is deprecated", what
);
12955 warning (OPT_Wdeprecated_declarations
, "type is deprecated: %s",
12958 warning (OPT_Wdeprecated_declarations
, "type is deprecated");
12964 /* Return true if REF has a COMPONENT_REF with a bit-field field declaration
12965 somewhere in it. */
12968 contains_bitfld_component_ref_p (const_tree ref
)
12970 while (handled_component_p (ref
))
12972 if (TREE_CODE (ref
) == COMPONENT_REF
12973 && DECL_BIT_FIELD (TREE_OPERAND (ref
, 1)))
12975 ref
= TREE_OPERAND (ref
, 0);
12981 /* Try to determine whether a TRY_CATCH expression can fall through.
12982 This is a subroutine of block_may_fallthru. */
12985 try_catch_may_fallthru (const_tree stmt
)
12987 tree_stmt_iterator i
;
12989 /* If the TRY block can fall through, the whole TRY_CATCH can
12991 if (block_may_fallthru (TREE_OPERAND (stmt
, 0)))
12994 i
= tsi_start (TREE_OPERAND (stmt
, 1));
12995 switch (TREE_CODE (tsi_stmt (i
)))
12998 /* We expect to see a sequence of CATCH_EXPR trees, each with a
12999 catch expression and a body. The whole TRY_CATCH may fall
13000 through iff any of the catch bodies falls through. */
13001 for (; !tsi_end_p (i
); tsi_next (&i
))
13003 if (block_may_fallthru (CATCH_BODY (tsi_stmt (i
))))
13008 case EH_FILTER_EXPR
:
13009 /* The exception filter expression only matters if there is an
13010 exception. If the exception does not match EH_FILTER_TYPES,
13011 we will execute EH_FILTER_FAILURE, and we will fall through
13012 if that falls through. If the exception does match
13013 EH_FILTER_TYPES, the stack unwinder will continue up the
13014 stack, so we will not fall through. We don't know whether we
13015 will throw an exception which matches EH_FILTER_TYPES or not,
13016 so we just ignore EH_FILTER_TYPES and assume that we might
13017 throw an exception which doesn't match. */
13018 return block_may_fallthru (EH_FILTER_FAILURE (tsi_stmt (i
)));
13021 /* This case represents statements to be executed when an
13022 exception occurs. Those statements are implicitly followed
13023 by a RESX statement to resume execution after the exception.
13024 So in this case the TRY_CATCH never falls through. */
13029 /* Try to determine if we can fall out of the bottom of BLOCK. This guess
13030 need not be 100% accurate; simply be conservative and return true if we
13031 don't know. This is used only to avoid stupidly generating extra code.
13032 If we're wrong, we'll just delete the extra code later. */
13035 block_may_fallthru (const_tree block
)
13037 /* This CONST_CAST is okay because expr_last returns its argument
13038 unmodified and we assign it to a const_tree. */
13039 const_tree stmt
= expr_last (CONST_CAST_TREE (block
));
13041 switch (stmt
? TREE_CODE (stmt
) : ERROR_MARK
)
13045 /* Easy cases. If the last statement of the block implies
13046 control transfer, then we can't fall through. */
13050 /* If SWITCH_LABELS is set, this is lowered, and represents a
13051 branch to a selected label and hence can not fall through.
13052 Otherwise SWITCH_BODY is set, and the switch can fall
13054 return SWITCH_LABELS (stmt
) == NULL_TREE
;
13057 if (block_may_fallthru (COND_EXPR_THEN (stmt
)))
13059 return block_may_fallthru (COND_EXPR_ELSE (stmt
));
13062 return block_may_fallthru (BIND_EXPR_BODY (stmt
));
13064 case TRY_CATCH_EXPR
:
13065 return try_catch_may_fallthru (stmt
);
13067 case TRY_FINALLY_EXPR
:
13068 /* The finally clause is always executed after the try clause,
13069 so if it does not fall through, then the try-finally will not
13070 fall through. Otherwise, if the try clause does not fall
13071 through, then when the finally clause falls through it will
13072 resume execution wherever the try clause was going. So the
13073 whole try-finally will only fall through if both the try
13074 clause and the finally clause fall through. */
13075 return (block_may_fallthru (TREE_OPERAND (stmt
, 0))
13076 && block_may_fallthru (TREE_OPERAND (stmt
, 1)));
13079 if (TREE_CODE (TREE_OPERAND (stmt
, 1)) == CALL_EXPR
)
13080 stmt
= TREE_OPERAND (stmt
, 1);
13086 /* Functions that do not return do not fall through. */
13087 return (call_expr_flags (stmt
) & ECF_NORETURN
) == 0;
13089 case CLEANUP_POINT_EXPR
:
13090 return block_may_fallthru (TREE_OPERAND (stmt
, 0));
13093 return block_may_fallthru (TREE_OPERAND (stmt
, 1));
13099 return lang_hooks
.block_may_fallthru (stmt
);
13103 /* True if we are using EH to handle cleanups. */
13104 static bool using_eh_for_cleanups_flag
= false;
13106 /* This routine is called from front ends to indicate eh should be used for
13109 using_eh_for_cleanups (void)
13111 using_eh_for_cleanups_flag
= true;
13114 /* Query whether EH is used for cleanups. */
13116 using_eh_for_cleanups_p (void)
13118 return using_eh_for_cleanups_flag
;
13121 /* Wrapper for tree_code_name to ensure that tree code is valid */
13123 get_tree_code_name (enum tree_code code
)
13125 const char *invalid
= "<invalid tree code>";
13127 if (code
>= MAX_TREE_CODES
)
13130 return tree_code_name
[code
];
13133 /* Drops the TREE_OVERFLOW flag from T. */
13136 drop_tree_overflow (tree t
)
13138 gcc_checking_assert (TREE_OVERFLOW (t
));
13140 /* For tree codes with a sharing machinery re-build the result. */
13141 if (TREE_CODE (t
) == INTEGER_CST
)
13142 return wide_int_to_tree (TREE_TYPE (t
), t
);
13144 /* Otherwise, as all tcc_constants are possibly shared, copy the node
13145 and drop the flag. */
13147 TREE_OVERFLOW (t
) = 0;
13149 /* For constants that contain nested constants, drop the flag
13150 from those as well. */
13151 if (TREE_CODE (t
) == COMPLEX_CST
)
13153 if (TREE_OVERFLOW (TREE_REALPART (t
)))
13154 TREE_REALPART (t
) = drop_tree_overflow (TREE_REALPART (t
));
13155 if (TREE_OVERFLOW (TREE_IMAGPART (t
)))
13156 TREE_IMAGPART (t
) = drop_tree_overflow (TREE_IMAGPART (t
));
13158 if (TREE_CODE (t
) == VECTOR_CST
)
13160 for (unsigned i
= 0; i
< VECTOR_CST_NELTS (t
); ++i
)
13162 tree
& elt
= VECTOR_CST_ELT (t
, i
);
13163 if (TREE_OVERFLOW (elt
))
13164 elt
= drop_tree_overflow (elt
);
13170 /* Given a memory reference expression T, return its base address.
13171 The base address of a memory reference expression is the main
13172 object being referenced. For instance, the base address for
13173 'array[i].fld[j]' is 'array'. You can think of this as stripping
13174 away the offset part from a memory address.
13176 This function calls handled_component_p to strip away all the inner
13177 parts of the memory reference until it reaches the base object. */
13180 get_base_address (tree t
)
13182 while (handled_component_p (t
))
13183 t
= TREE_OPERAND (t
, 0);
13185 if ((TREE_CODE (t
) == MEM_REF
13186 || TREE_CODE (t
) == TARGET_MEM_REF
)
13187 && TREE_CODE (TREE_OPERAND (t
, 0)) == ADDR_EXPR
)
13188 t
= TREE_OPERAND (TREE_OPERAND (t
, 0), 0);
13190 /* ??? Either the alias oracle or all callers need to properly deal
13191 with WITH_SIZE_EXPRs before we can look through those. */
13192 if (TREE_CODE (t
) == WITH_SIZE_EXPR
)
13198 /* Return a tree of sizetype representing the size, in bytes, of the element
13199 of EXP, an ARRAY_REF or an ARRAY_RANGE_REF. */
13202 array_ref_element_size (tree exp
)
13204 tree aligned_size
= TREE_OPERAND (exp
, 3);
13205 tree elmt_type
= TREE_TYPE (TREE_TYPE (TREE_OPERAND (exp
, 0)));
13206 location_t loc
= EXPR_LOCATION (exp
);
13208 /* If a size was specified in the ARRAY_REF, it's the size measured
13209 in alignment units of the element type. So multiply by that value. */
13212 /* ??? tree_ssa_useless_type_conversion will eliminate casts to
13213 sizetype from another type of the same width and signedness. */
13214 if (TREE_TYPE (aligned_size
) != sizetype
)
13215 aligned_size
= fold_convert_loc (loc
, sizetype
, aligned_size
);
13216 return size_binop_loc (loc
, MULT_EXPR
, aligned_size
,
13217 size_int (TYPE_ALIGN_UNIT (elmt_type
)));
13220 /* Otherwise, take the size from that of the element type. Substitute
13221 any PLACEHOLDER_EXPR that we have. */
13223 return SUBSTITUTE_PLACEHOLDER_IN_EXPR (TYPE_SIZE_UNIT (elmt_type
), exp
);
13226 /* Return a tree representing the lower bound of the array mentioned in
13227 EXP, an ARRAY_REF or an ARRAY_RANGE_REF. */
13230 array_ref_low_bound (tree exp
)
13232 tree domain_type
= TYPE_DOMAIN (TREE_TYPE (TREE_OPERAND (exp
, 0)));
13234 /* If a lower bound is specified in EXP, use it. */
13235 if (TREE_OPERAND (exp
, 2))
13236 return TREE_OPERAND (exp
, 2);
13238 /* Otherwise, if there is a domain type and it has a lower bound, use it,
13239 substituting for a PLACEHOLDER_EXPR as needed. */
13240 if (domain_type
&& TYPE_MIN_VALUE (domain_type
))
13241 return SUBSTITUTE_PLACEHOLDER_IN_EXPR (TYPE_MIN_VALUE (domain_type
), exp
);
13243 /* Otherwise, return a zero of the appropriate type. */
13244 return build_int_cst (TREE_TYPE (TREE_OPERAND (exp
, 1)), 0);
13247 /* Return a tree representing the upper bound of the array mentioned in
13248 EXP, an ARRAY_REF or an ARRAY_RANGE_REF. */
13251 array_ref_up_bound (tree exp
)
13253 tree domain_type
= TYPE_DOMAIN (TREE_TYPE (TREE_OPERAND (exp
, 0)));
13255 /* If there is a domain type and it has an upper bound, use it, substituting
13256 for a PLACEHOLDER_EXPR as needed. */
13257 if (domain_type
&& TYPE_MAX_VALUE (domain_type
))
13258 return SUBSTITUTE_PLACEHOLDER_IN_EXPR (TYPE_MAX_VALUE (domain_type
), exp
);
13260 /* Otherwise fail. */
13264 /* Returns true if REF is an array reference or a component reference
13265 to an array at the end of a structure.
13266 If this is the case, the array may be allocated larger
13267 than its upper bound implies. */
13270 array_at_struct_end_p (tree ref
)
13274 if (TREE_CODE (ref
) == ARRAY_REF
13275 || TREE_CODE (ref
) == ARRAY_RANGE_REF
)
13277 atype
= TREE_TYPE (TREE_OPERAND (ref
, 0));
13278 ref
= TREE_OPERAND (ref
, 0);
13280 else if (TREE_CODE (ref
) == COMPONENT_REF
13281 && TREE_CODE (TREE_TYPE (TREE_OPERAND (ref
, 1))) == ARRAY_TYPE
)
13282 atype
= TREE_TYPE (TREE_OPERAND (ref
, 1));
13286 while (handled_component_p (ref
))
13288 /* If the reference chain contains a component reference to a
13289 non-union type and there follows another field the reference
13290 is not at the end of a structure. */
13291 if (TREE_CODE (ref
) == COMPONENT_REF
)
13293 if (TREE_CODE (TREE_TYPE (TREE_OPERAND (ref
, 0))) == RECORD_TYPE
)
13295 tree nextf
= DECL_CHAIN (TREE_OPERAND (ref
, 1));
13296 while (nextf
&& TREE_CODE (nextf
) != FIELD_DECL
)
13297 nextf
= DECL_CHAIN (nextf
);
13302 /* If we have a multi-dimensional array we do not consider
13303 a non-innermost dimension as flex array if the whole
13304 multi-dimensional array is at struct end.
13305 Same for an array of aggregates with a trailing array
13307 else if (TREE_CODE (ref
) == ARRAY_REF
)
13309 else if (TREE_CODE (ref
) == ARRAY_RANGE_REF
)
13311 /* If we view an underlying object as sth else then what we
13312 gathered up to now is what we have to rely on. */
13313 else if (TREE_CODE (ref
) == VIEW_CONVERT_EXPR
)
13316 gcc_unreachable ();
13318 ref
= TREE_OPERAND (ref
, 0);
13321 /* The array now is at struct end. Treat flexible arrays as
13322 always subject to extend, even into just padding constrained by
13323 an underlying decl. */
13324 if (! TYPE_SIZE (atype
))
13329 if (TREE_CODE (ref
) == MEM_REF
13330 && TREE_CODE (TREE_OPERAND (ref
, 0)) == ADDR_EXPR
)
13332 size
= TYPE_SIZE (TREE_TYPE (ref
));
13333 ref
= TREE_OPERAND (TREE_OPERAND (ref
, 0), 0);
13336 /* If the reference is based on a declared entity, the size of the array
13337 is constrained by its given domain. (Do not trust commons PR/69368). */
13339 /* Be sure the size of MEM_REF target match. For example:
13342 struct foo *str = (struct foo *)&buf;
13344 str->trailin_array[2] = 1;
13346 is valid because BUF allocate enough space. */
13348 && (!size
|| (DECL_SIZE (ref
) != NULL
13349 && operand_equal_p (DECL_SIZE (ref
), size
, 0)))
13350 && !(flag_unconstrained_commons
13351 && VAR_P (ref
) && DECL_COMMON (ref
)))
13357 /* Return a tree representing the offset, in bytes, of the field referenced
13358 by EXP. This does not include any offset in DECL_FIELD_BIT_OFFSET. */
13361 component_ref_field_offset (tree exp
)
13363 tree aligned_offset
= TREE_OPERAND (exp
, 2);
13364 tree field
= TREE_OPERAND (exp
, 1);
13365 location_t loc
= EXPR_LOCATION (exp
);
13367 /* If an offset was specified in the COMPONENT_REF, it's the offset measured
13368 in units of DECL_OFFSET_ALIGN / BITS_PER_UNIT. So multiply by that
13370 if (aligned_offset
)
13372 /* ??? tree_ssa_useless_type_conversion will eliminate casts to
13373 sizetype from another type of the same width and signedness. */
13374 if (TREE_TYPE (aligned_offset
) != sizetype
)
13375 aligned_offset
= fold_convert_loc (loc
, sizetype
, aligned_offset
);
13376 return size_binop_loc (loc
, MULT_EXPR
, aligned_offset
,
13377 size_int (DECL_OFFSET_ALIGN (field
)
13381 /* Otherwise, take the offset from that of the field. Substitute
13382 any PLACEHOLDER_EXPR that we have. */
13384 return SUBSTITUTE_PLACEHOLDER_IN_EXPR (DECL_FIELD_OFFSET (field
), exp
);
13387 /* Return the machine mode of T. For vectors, returns the mode of the
13388 inner type. The main use case is to feed the result to HONOR_NANS,
13389 avoiding the BLKmode that a direct TYPE_MODE (T) might return. */
13392 element_mode (const_tree t
)
13396 if (VECTOR_TYPE_P (t
) || TREE_CODE (t
) == COMPLEX_TYPE
)
13398 return TYPE_MODE (t
);
13402 /* Veirfy that basic properties of T match TV and thus T can be a variant of
13403 TV. TV should be the more specified variant (i.e. the main variant). */
13406 verify_type_variant (const_tree t
, tree tv
)
13408 /* Type variant can differ by:
13410 - TYPE_QUALS: TYPE_READONLY, TYPE_VOLATILE, TYPE_ATOMIC, TYPE_RESTRICT,
13411 ENCODE_QUAL_ADDR_SPACE.
13412 - main variant may be TYPE_COMPLETE_P and variant types !TYPE_COMPLETE_P
13413 in this case some values may not be set in the variant types
13414 (see TYPE_COMPLETE_P checks).
13415 - it is possible to have TYPE_ARTIFICIAL variant of non-artifical type
13416 - by TYPE_NAME and attributes (i.e. when variant originate by typedef)
13417 - TYPE_CANONICAL (TYPE_ALIAS_SET is the same among variants)
13418 - by the alignment: TYPE_ALIGN and TYPE_USER_ALIGN
13419 - during LTO by TYPE_CONTEXT if type is TYPE_FILE_SCOPE_P
13420 this is necessary to make it possible to merge types form different TUs
13421 - arrays, pointers and references may have TREE_TYPE that is a variant
13422 of TREE_TYPE of their main variants.
13423 - aggregates may have new TYPE_FIELDS list that list variants of
13424 the main variant TYPE_FIELDS.
13425 - vector types may differ by TYPE_VECTOR_OPAQUE
13426 - TYPE_METHODS is always NULL for variant types and maintained for
13430 /* Convenience macro for matching individual fields. */
13431 #define verify_variant_match(flag) \
13433 if (flag (tv) != flag (t)) \
13435 error ("type variant differs by " #flag "."); \
13441 /* tree_base checks. */
13443 verify_variant_match (TREE_CODE
);
13444 /* FIXME: Ada builds non-artificial variants of artificial types. */
13445 if (TYPE_ARTIFICIAL (tv
) && 0)
13446 verify_variant_match (TYPE_ARTIFICIAL
);
13447 if (POINTER_TYPE_P (tv
))
13448 verify_variant_match (TYPE_REF_CAN_ALIAS_ALL
);
13449 /* FIXME: TYPE_SIZES_GIMPLIFIED may differs for Ada build. */
13450 verify_variant_match (TYPE_UNSIGNED
);
13451 verify_variant_match (TYPE_PACKED
);
13452 if (TREE_CODE (t
) == REFERENCE_TYPE
)
13453 verify_variant_match (TYPE_REF_IS_RVALUE
);
13454 if (AGGREGATE_TYPE_P (t
))
13455 verify_variant_match (TYPE_REVERSE_STORAGE_ORDER
);
13457 verify_variant_match (TYPE_SATURATING
);
13458 /* FIXME: This check trigger during libstdc++ build. */
13459 if (RECORD_OR_UNION_TYPE_P (t
) && COMPLETE_TYPE_P (t
) && 0)
13460 verify_variant_match (TYPE_FINAL_P
);
13462 /* tree_type_common checks. */
13464 if (COMPLETE_TYPE_P (t
))
13466 verify_variant_match (TYPE_MODE
);
13467 if (TREE_CODE (TYPE_SIZE (t
)) != PLACEHOLDER_EXPR
13468 && TREE_CODE (TYPE_SIZE (tv
)) != PLACEHOLDER_EXPR
)
13469 verify_variant_match (TYPE_SIZE
);
13470 if (TREE_CODE (TYPE_SIZE_UNIT (t
)) != PLACEHOLDER_EXPR
13471 && TREE_CODE (TYPE_SIZE_UNIT (tv
)) != PLACEHOLDER_EXPR
13472 && TYPE_SIZE_UNIT (t
) != TYPE_SIZE_UNIT (tv
))
13474 gcc_assert (!operand_equal_p (TYPE_SIZE_UNIT (t
),
13475 TYPE_SIZE_UNIT (tv
), 0));
13476 error ("type variant has different TYPE_SIZE_UNIT");
13478 error ("type variant's TYPE_SIZE_UNIT");
13479 debug_tree (TYPE_SIZE_UNIT (tv
));
13480 error ("type's TYPE_SIZE_UNIT");
13481 debug_tree (TYPE_SIZE_UNIT (t
));
13485 verify_variant_match (TYPE_PRECISION
);
13486 verify_variant_match (TYPE_NEEDS_CONSTRUCTING
);
13487 if (RECORD_OR_UNION_TYPE_P (t
))
13488 verify_variant_match (TYPE_TRANSPARENT_AGGR
);
13489 else if (TREE_CODE (t
) == ARRAY_TYPE
)
13490 verify_variant_match (TYPE_NONALIASED_COMPONENT
);
13491 /* During LTO we merge variant lists from diferent translation units
13492 that may differ BY TYPE_CONTEXT that in turn may point
13493 to TRANSLATION_UNIT_DECL.
13494 Ada also builds variants of types with different TYPE_CONTEXT. */
13495 if ((!in_lto_p
|| !TYPE_FILE_SCOPE_P (t
)) && 0)
13496 verify_variant_match (TYPE_CONTEXT
);
13497 verify_variant_match (TYPE_STRING_FLAG
);
13498 if (TYPE_ALIAS_SET_KNOWN_P (t
))
13500 error ("type variant with TYPE_ALIAS_SET_KNOWN_P");
13505 /* tree_type_non_common checks. */
13507 /* FIXME: C FE uses TYPE_VFIELD to record C_TYPE_INCOMPLETE_VARS
13508 and dangle the pointer from time to time. */
13509 if (RECORD_OR_UNION_TYPE_P (t
) && TYPE_VFIELD (t
) != TYPE_VFIELD (tv
)
13510 && (in_lto_p
|| !TYPE_VFIELD (tv
)
13511 || TREE_CODE (TYPE_VFIELD (tv
)) != TREE_LIST
))
13513 error ("type variant has different TYPE_VFIELD");
13517 if ((TREE_CODE (t
) == ENUMERAL_TYPE
&& COMPLETE_TYPE_P (t
))
13518 || TREE_CODE (t
) == INTEGER_TYPE
13519 || TREE_CODE (t
) == BOOLEAN_TYPE
13520 || TREE_CODE (t
) == REAL_TYPE
13521 || TREE_CODE (t
) == FIXED_POINT_TYPE
)
13523 verify_variant_match (TYPE_MAX_VALUE
);
13524 verify_variant_match (TYPE_MIN_VALUE
);
13526 if (TREE_CODE (t
) == METHOD_TYPE
)
13527 verify_variant_match (TYPE_METHOD_BASETYPE
);
13528 if (RECORD_OR_UNION_TYPE_P (t
) && TYPE_METHODS (t
))
13530 error ("type variant has TYPE_METHODS");
13534 if (TREE_CODE (t
) == OFFSET_TYPE
)
13535 verify_variant_match (TYPE_OFFSET_BASETYPE
);
13536 if (TREE_CODE (t
) == ARRAY_TYPE
)
13537 verify_variant_match (TYPE_ARRAY_MAX_SIZE
);
13538 /* FIXME: Be lax and allow TYPE_BINFO to be missing in variant types
13539 or even type's main variant. This is needed to make bootstrap pass
13540 and the bug seems new in GCC 5.
13541 C++ FE should be updated to make this consistent and we should check
13542 that TYPE_BINFO is always NULL for !COMPLETE_TYPE_P and otherwise there
13543 is a match with main variant.
13545 Also disable the check for Java for now because of parser hack that builds
13546 first an dummy BINFO and then sometimes replace it by real BINFO in some
13548 if (RECORD_OR_UNION_TYPE_P (t
) && TYPE_BINFO (t
) && TYPE_BINFO (tv
)
13549 && TYPE_BINFO (t
) != TYPE_BINFO (tv
)
13550 /* FIXME: Java sometimes keep dump TYPE_BINFOs on variant types.
13551 Since there is no cheap way to tell C++/Java type w/o LTO, do checking
13552 at LTO time only. */
13553 && (in_lto_p
&& odr_type_p (t
)))
13555 error ("type variant has different TYPE_BINFO");
13557 error ("type variant's TYPE_BINFO");
13558 debug_tree (TYPE_BINFO (tv
));
13559 error ("type's TYPE_BINFO");
13560 debug_tree (TYPE_BINFO (t
));
13564 /* Check various uses of TYPE_VALUES_RAW. */
13565 if (TREE_CODE (t
) == ENUMERAL_TYPE
)
13566 verify_variant_match (TYPE_VALUES
);
13567 else if (TREE_CODE (t
) == ARRAY_TYPE
)
13568 verify_variant_match (TYPE_DOMAIN
);
13569 /* Permit incomplete variants of complete type. While FEs may complete
13570 all variants, this does not happen for C++ templates in all cases. */
13571 else if (RECORD_OR_UNION_TYPE_P (t
)
13572 && COMPLETE_TYPE_P (t
)
13573 && TYPE_FIELDS (t
) != TYPE_FIELDS (tv
))
13577 /* Fortran builds qualified variants as new records with items of
13578 qualified type. Verify that they looks same. */
13579 for (f1
= TYPE_FIELDS (t
), f2
= TYPE_FIELDS (tv
);
13581 f1
= TREE_CHAIN (f1
), f2
= TREE_CHAIN (f2
))
13582 if (TREE_CODE (f1
) != FIELD_DECL
|| TREE_CODE (f2
) != FIELD_DECL
13583 || (TYPE_MAIN_VARIANT (TREE_TYPE (f1
))
13584 != TYPE_MAIN_VARIANT (TREE_TYPE (f2
))
13585 /* FIXME: gfc_nonrestricted_type builds all types as variants
13586 with exception of pointer types. It deeply copies the type
13587 which means that we may end up with a variant type
13588 referring non-variant pointer. We may change it to
13589 produce types as variants, too, like
13590 objc_get_protocol_qualified_type does. */
13591 && !POINTER_TYPE_P (TREE_TYPE (f1
)))
13592 || DECL_FIELD_OFFSET (f1
) != DECL_FIELD_OFFSET (f2
)
13593 || DECL_FIELD_BIT_OFFSET (f1
) != DECL_FIELD_BIT_OFFSET (f2
))
13597 error ("type variant has different TYPE_FIELDS");
13599 error ("first mismatch is field");
13601 error ("and field");
13606 else if ((TREE_CODE (t
) == FUNCTION_TYPE
|| TREE_CODE (t
) == METHOD_TYPE
))
13607 verify_variant_match (TYPE_ARG_TYPES
);
13608 /* For C++ the qualified variant of array type is really an array type
13609 of qualified TREE_TYPE.
13610 objc builds variants of pointer where pointer to type is a variant, too
13611 in objc_get_protocol_qualified_type. */
13612 if (TREE_TYPE (t
) != TREE_TYPE (tv
)
13613 && ((TREE_CODE (t
) != ARRAY_TYPE
13614 && !POINTER_TYPE_P (t
))
13615 || TYPE_MAIN_VARIANT (TREE_TYPE (t
))
13616 != TYPE_MAIN_VARIANT (TREE_TYPE (tv
))))
13618 error ("type variant has different TREE_TYPE");
13620 error ("type variant's TREE_TYPE");
13621 debug_tree (TREE_TYPE (tv
));
13622 error ("type's TREE_TYPE");
13623 debug_tree (TREE_TYPE (t
));
13626 if (type_with_alias_set_p (t
)
13627 && !gimple_canonical_types_compatible_p (t
, tv
, false))
13629 error ("type is not compatible with its variant");
13631 error ("type variant's TREE_TYPE");
13632 debug_tree (TREE_TYPE (tv
));
13633 error ("type's TREE_TYPE");
13634 debug_tree (TREE_TYPE (t
));
13638 #undef verify_variant_match
13642 /* The TYPE_CANONICAL merging machinery. It should closely resemble
13643 the middle-end types_compatible_p function. It needs to avoid
13644 claiming types are different for types that should be treated
13645 the same with respect to TBAA. Canonical types are also used
13646 for IL consistency checks via the useless_type_conversion_p
13647 predicate which does not handle all type kinds itself but falls
13648 back to pointer-comparison of TYPE_CANONICAL for aggregates
13651 /* Return true if TYPE_UNSIGNED of TYPE should be ignored for canonical
13652 type calculation because we need to allow inter-operability between signed
13653 and unsigned variants. */
13656 type_with_interoperable_signedness (const_tree type
)
13658 /* Fortran standard require C_SIGNED_CHAR to be interoperable with both
13659 signed char and unsigned char. Similarly fortran FE builds
13660 C_SIZE_T as signed type, while C defines it unsigned. */
13662 return tree_code_for_canonical_type_merging (TREE_CODE (type
))
13664 && (TYPE_PRECISION (type
) == TYPE_PRECISION (signed_char_type_node
)
13665 || TYPE_PRECISION (type
) == TYPE_PRECISION (size_type_node
));
13668 /* Return true iff T1 and T2 are structurally identical for what
13670 This function is used both by lto.c canonical type merging and by the
13671 verifier. If TRUST_TYPE_CANONICAL we do not look into structure of types
13672 that have TYPE_CANONICAL defined and assume them equivalent. This is useful
13673 only for LTO because only in these cases TYPE_CANONICAL equivalence
13674 correspond to one defined by gimple_canonical_types_compatible_p. */
13677 gimple_canonical_types_compatible_p (const_tree t1
, const_tree t2
,
13678 bool trust_type_canonical
)
13680 /* Type variants should be same as the main variant. When not doing sanity
13681 checking to verify this fact, go to main variants and save some work. */
13682 if (trust_type_canonical
)
13684 t1
= TYPE_MAIN_VARIANT (t1
);
13685 t2
= TYPE_MAIN_VARIANT (t2
);
13688 /* Check first for the obvious case of pointer identity. */
13692 /* Check that we have two types to compare. */
13693 if (t1
== NULL_TREE
|| t2
== NULL_TREE
)
13696 /* We consider complete types always compatible with incomplete type.
13697 This does not make sense for canonical type calculation and thus we
13698 need to ensure that we are never called on it.
13700 FIXME: For more correctness the function probably should have three modes
13701 1) mode assuming that types are complete mathcing their structure
13702 2) mode allowing incomplete types but producing equivalence classes
13703 and thus ignoring all info from complete types
13704 3) mode allowing incomplete types to match complete but checking
13705 compatibility between complete types.
13707 1 and 2 can be used for canonical type calculation. 3 is the real
13708 definition of type compatibility that can be used i.e. for warnings during
13709 declaration merging. */
13711 gcc_assert (!trust_type_canonical
13712 || (type_with_alias_set_p (t1
) && type_with_alias_set_p (t2
)));
13713 /* If the types have been previously registered and found equal
13716 if (TYPE_CANONICAL (t1
) && TYPE_CANONICAL (t2
)
13717 && trust_type_canonical
)
13719 /* Do not use TYPE_CANONICAL of pointer types. For LTO streamed types
13720 they are always NULL, but they are set to non-NULL for types
13721 constructed by build_pointer_type and variants. In this case the
13722 TYPE_CANONICAL is more fine grained than the equivalnce we test (where
13723 all pointers are considered equal. Be sure to not return false
13725 gcc_checking_assert (canonical_type_used_p (t1
)
13726 && canonical_type_used_p (t2
));
13727 return TYPE_CANONICAL (t1
) == TYPE_CANONICAL (t2
);
13730 /* Can't be the same type if the types don't have the same code. */
13731 enum tree_code code
= tree_code_for_canonical_type_merging (TREE_CODE (t1
));
13732 if (code
!= tree_code_for_canonical_type_merging (TREE_CODE (t2
)))
13735 /* Qualifiers do not matter for canonical type comparison purposes. */
13737 /* Void types and nullptr types are always the same. */
13738 if (TREE_CODE (t1
) == VOID_TYPE
13739 || TREE_CODE (t1
) == NULLPTR_TYPE
)
13742 /* Can't be the same type if they have different mode. */
13743 if (TYPE_MODE (t1
) != TYPE_MODE (t2
))
13746 /* Non-aggregate types can be handled cheaply. */
13747 if (INTEGRAL_TYPE_P (t1
)
13748 || SCALAR_FLOAT_TYPE_P (t1
)
13749 || FIXED_POINT_TYPE_P (t1
)
13750 || TREE_CODE (t1
) == VECTOR_TYPE
13751 || TREE_CODE (t1
) == COMPLEX_TYPE
13752 || TREE_CODE (t1
) == OFFSET_TYPE
13753 || POINTER_TYPE_P (t1
))
13755 /* Can't be the same type if they have different recision. */
13756 if (TYPE_PRECISION (t1
) != TYPE_PRECISION (t2
))
13759 /* In some cases the signed and unsigned types are required to be
13761 if (TYPE_UNSIGNED (t1
) != TYPE_UNSIGNED (t2
)
13762 && !type_with_interoperable_signedness (t1
))
13765 /* Fortran's C_SIGNED_CHAR is !TYPE_STRING_FLAG but needs to be
13766 interoperable with "signed char". Unless all frontends are revisited
13767 to agree on these types, we must ignore the flag completely. */
13769 /* Fortran standard define C_PTR type that is compatible with every
13770 C pointer. For this reason we need to glob all pointers into one.
13771 Still pointers in different address spaces are not compatible. */
13772 if (POINTER_TYPE_P (t1
))
13774 if (TYPE_ADDR_SPACE (TREE_TYPE (t1
))
13775 != TYPE_ADDR_SPACE (TREE_TYPE (t2
)))
13779 /* Tail-recurse to components. */
13780 if (TREE_CODE (t1
) == VECTOR_TYPE
13781 || TREE_CODE (t1
) == COMPLEX_TYPE
)
13782 return gimple_canonical_types_compatible_p (TREE_TYPE (t1
),
13784 trust_type_canonical
);
13789 /* Do type-specific comparisons. */
13790 switch (TREE_CODE (t1
))
13793 /* Array types are the same if the element types are the same and
13794 the number of elements are the same. */
13795 if (!gimple_canonical_types_compatible_p (TREE_TYPE (t1
), TREE_TYPE (t2
),
13796 trust_type_canonical
)
13797 || TYPE_STRING_FLAG (t1
) != TYPE_STRING_FLAG (t2
)
13798 || TYPE_REVERSE_STORAGE_ORDER (t1
) != TYPE_REVERSE_STORAGE_ORDER (t2
)
13799 || TYPE_NONALIASED_COMPONENT (t1
) != TYPE_NONALIASED_COMPONENT (t2
))
13803 tree i1
= TYPE_DOMAIN (t1
);
13804 tree i2
= TYPE_DOMAIN (t2
);
13806 /* For an incomplete external array, the type domain can be
13807 NULL_TREE. Check this condition also. */
13808 if (i1
== NULL_TREE
&& i2
== NULL_TREE
)
13810 else if (i1
== NULL_TREE
|| i2
== NULL_TREE
)
13814 tree min1
= TYPE_MIN_VALUE (i1
);
13815 tree min2
= TYPE_MIN_VALUE (i2
);
13816 tree max1
= TYPE_MAX_VALUE (i1
);
13817 tree max2
= TYPE_MAX_VALUE (i2
);
13819 /* The minimum/maximum values have to be the same. */
13822 && ((TREE_CODE (min1
) == PLACEHOLDER_EXPR
13823 && TREE_CODE (min2
) == PLACEHOLDER_EXPR
)
13824 || operand_equal_p (min1
, min2
, 0))))
13827 && ((TREE_CODE (max1
) == PLACEHOLDER_EXPR
13828 && TREE_CODE (max2
) == PLACEHOLDER_EXPR
)
13829 || operand_equal_p (max1
, max2
, 0)))))
13837 case FUNCTION_TYPE
:
13838 /* Function types are the same if the return type and arguments types
13840 if (!gimple_canonical_types_compatible_p (TREE_TYPE (t1
), TREE_TYPE (t2
),
13841 trust_type_canonical
))
13844 if (TYPE_ARG_TYPES (t1
) == TYPE_ARG_TYPES (t2
))
13848 tree parms1
, parms2
;
13850 for (parms1
= TYPE_ARG_TYPES (t1
), parms2
= TYPE_ARG_TYPES (t2
);
13852 parms1
= TREE_CHAIN (parms1
), parms2
= TREE_CHAIN (parms2
))
13854 if (!gimple_canonical_types_compatible_p
13855 (TREE_VALUE (parms1
), TREE_VALUE (parms2
),
13856 trust_type_canonical
))
13860 if (parms1
|| parms2
)
13868 case QUAL_UNION_TYPE
:
13872 /* Don't try to compare variants of an incomplete type, before
13873 TYPE_FIELDS has been copied around. */
13874 if (!COMPLETE_TYPE_P (t1
) && !COMPLETE_TYPE_P (t2
))
13878 if (TYPE_REVERSE_STORAGE_ORDER (t1
) != TYPE_REVERSE_STORAGE_ORDER (t2
))
13881 /* For aggregate types, all the fields must be the same. */
13882 for (f1
= TYPE_FIELDS (t1
), f2
= TYPE_FIELDS (t2
);
13884 f1
= TREE_CHAIN (f1
), f2
= TREE_CHAIN (f2
))
13886 /* Skip non-fields and zero-sized fields. */
13887 while (f1
&& (TREE_CODE (f1
) != FIELD_DECL
13889 && integer_zerop (DECL_SIZE (f1
)))))
13890 f1
= TREE_CHAIN (f1
);
13891 while (f2
&& (TREE_CODE (f2
) != FIELD_DECL
13893 && integer_zerop (DECL_SIZE (f2
)))))
13894 f2
= TREE_CHAIN (f2
);
13897 /* The fields must have the same name, offset and type. */
13898 if (DECL_NONADDRESSABLE_P (f1
) != DECL_NONADDRESSABLE_P (f2
)
13899 || !gimple_compare_field_offset (f1
, f2
)
13900 || !gimple_canonical_types_compatible_p
13901 (TREE_TYPE (f1
), TREE_TYPE (f2
),
13902 trust_type_canonical
))
13906 /* If one aggregate has more fields than the other, they
13907 are not the same. */
13915 /* Consider all types with language specific trees in them mutually
13916 compatible. This is executed only from verify_type and false
13917 positives can be tolerated. */
13918 gcc_assert (!in_lto_p
);
13923 /* Verify type T. */
13926 verify_type (const_tree t
)
13928 bool error_found
= false;
13929 tree mv
= TYPE_MAIN_VARIANT (t
);
13932 error ("Main variant is not defined");
13933 error_found
= true;
13935 else if (mv
!= TYPE_MAIN_VARIANT (mv
))
13937 error ("TYPE_MAIN_VARIANT has different TYPE_MAIN_VARIANT");
13939 error_found
= true;
13941 else if (t
!= mv
&& !verify_type_variant (t
, mv
))
13942 error_found
= true;
13944 tree ct
= TYPE_CANONICAL (t
);
13947 else if (TYPE_CANONICAL (t
) != ct
)
13949 error ("TYPE_CANONICAL has different TYPE_CANONICAL");
13951 error_found
= true;
13953 /* Method and function types can not be used to address memory and thus
13954 TYPE_CANONICAL really matters only for determining useless conversions.
13956 FIXME: C++ FE produce declarations of builtin functions that are not
13957 compatible with main variants. */
13958 else if (TREE_CODE (t
) == FUNCTION_TYPE
)
13961 /* FIXME: gimple_canonical_types_compatible_p can not compare types
13962 with variably sized arrays because their sizes possibly
13963 gimplified to different variables. */
13964 && !variably_modified_type_p (ct
, NULL
)
13965 && !gimple_canonical_types_compatible_p (t
, ct
, false))
13967 error ("TYPE_CANONICAL is not compatible");
13969 error_found
= true;
13972 if (COMPLETE_TYPE_P (t
) && TYPE_CANONICAL (t
)
13973 && TYPE_MODE (t
) != TYPE_MODE (TYPE_CANONICAL (t
)))
13975 error ("TYPE_MODE of TYPE_CANONICAL is not compatible");
13977 error_found
= true;
13979 /* FIXME: this is violated by the C++ FE as discussed in PR70029, when
13980 FUNCTION_*_QUALIFIED flags are set. */
13981 if (0 && TYPE_MAIN_VARIANT (t
) == t
&& ct
&& TYPE_MAIN_VARIANT (ct
) != ct
)
13983 error ("TYPE_CANONICAL of main variant is not main variant");
13985 debug_tree (TYPE_MAIN_VARIANT (ct
));
13986 error_found
= true;
13990 /* Check various uses of TYPE_MINVAL. */
13991 if (RECORD_OR_UNION_TYPE_P (t
))
13993 /* FIXME: C FE uses TYPE_VFIELD to record C_TYPE_INCOMPLETE_VARS
13994 and danagle the pointer from time to time. */
13995 if (TYPE_VFIELD (t
)
13996 && TREE_CODE (TYPE_VFIELD (t
)) != FIELD_DECL
13997 && TREE_CODE (TYPE_VFIELD (t
)) != TREE_LIST
)
13999 error ("TYPE_VFIELD is not FIELD_DECL nor TREE_LIST");
14000 debug_tree (TYPE_VFIELD (t
));
14001 error_found
= true;
14004 else if (TREE_CODE (t
) == POINTER_TYPE
)
14006 if (TYPE_NEXT_PTR_TO (t
)
14007 && TREE_CODE (TYPE_NEXT_PTR_TO (t
)) != POINTER_TYPE
)
14009 error ("TYPE_NEXT_PTR_TO is not POINTER_TYPE");
14010 debug_tree (TYPE_NEXT_PTR_TO (t
));
14011 error_found
= true;
14014 else if (TREE_CODE (t
) == REFERENCE_TYPE
)
14016 if (TYPE_NEXT_REF_TO (t
)
14017 && TREE_CODE (TYPE_NEXT_REF_TO (t
)) != REFERENCE_TYPE
)
14019 error ("TYPE_NEXT_REF_TO is not REFERENCE_TYPE");
14020 debug_tree (TYPE_NEXT_REF_TO (t
));
14021 error_found
= true;
14024 else if (INTEGRAL_TYPE_P (t
) || TREE_CODE (t
) == REAL_TYPE
14025 || TREE_CODE (t
) == FIXED_POINT_TYPE
)
14027 /* FIXME: The following check should pass:
14028 useless_type_conversion_p (const_cast <tree> (t),
14029 TREE_TYPE (TYPE_MIN_VALUE (t))
14030 but does not for C sizetypes in LTO. */
14032 /* Java uses TYPE_MINVAL for TYPE_ARGUMENT_SIGNATURE. */
14033 else if (TYPE_MINVAL (t
)
14034 && ((TREE_CODE (t
) != METHOD_TYPE
&& TREE_CODE (t
) != FUNCTION_TYPE
)
14037 error ("TYPE_MINVAL non-NULL");
14038 debug_tree (TYPE_MINVAL (t
));
14039 error_found
= true;
14042 /* Check various uses of TYPE_MAXVAL. */
14043 if (RECORD_OR_UNION_TYPE_P (t
))
14045 if (TYPE_METHODS (t
) && TREE_CODE (TYPE_METHODS (t
)) != FUNCTION_DECL
14046 && TREE_CODE (TYPE_METHODS (t
)) != TEMPLATE_DECL
14047 && TYPE_METHODS (t
) != error_mark_node
)
14049 error ("TYPE_METHODS is not FUNCTION_DECL, TEMPLATE_DECL nor error_mark_node");
14050 debug_tree (TYPE_METHODS (t
));
14051 error_found
= true;
14054 else if (TREE_CODE (t
) == FUNCTION_TYPE
|| TREE_CODE (t
) == METHOD_TYPE
)
14056 if (TYPE_METHOD_BASETYPE (t
)
14057 && TREE_CODE (TYPE_METHOD_BASETYPE (t
)) != RECORD_TYPE
14058 && TREE_CODE (TYPE_METHOD_BASETYPE (t
)) != UNION_TYPE
)
14060 error ("TYPE_METHOD_BASETYPE is not record nor union");
14061 debug_tree (TYPE_METHOD_BASETYPE (t
));
14062 error_found
= true;
14065 else if (TREE_CODE (t
) == OFFSET_TYPE
)
14067 if (TYPE_OFFSET_BASETYPE (t
)
14068 && TREE_CODE (TYPE_OFFSET_BASETYPE (t
)) != RECORD_TYPE
14069 && TREE_CODE (TYPE_OFFSET_BASETYPE (t
)) != UNION_TYPE
)
14071 error ("TYPE_OFFSET_BASETYPE is not record nor union");
14072 debug_tree (TYPE_OFFSET_BASETYPE (t
));
14073 error_found
= true;
14076 else if (INTEGRAL_TYPE_P (t
) || TREE_CODE (t
) == REAL_TYPE
14077 || TREE_CODE (t
) == FIXED_POINT_TYPE
)
14079 /* FIXME: The following check should pass:
14080 useless_type_conversion_p (const_cast <tree> (t),
14081 TREE_TYPE (TYPE_MAX_VALUE (t))
14082 but does not for C sizetypes in LTO. */
14084 else if (TREE_CODE (t
) == ARRAY_TYPE
)
14086 if (TYPE_ARRAY_MAX_SIZE (t
)
14087 && TREE_CODE (TYPE_ARRAY_MAX_SIZE (t
)) != INTEGER_CST
)
14089 error ("TYPE_ARRAY_MAX_SIZE not INTEGER_CST");
14090 debug_tree (TYPE_ARRAY_MAX_SIZE (t
));
14091 error_found
= true;
14094 else if (TYPE_MAXVAL (t
))
14096 error ("TYPE_MAXVAL non-NULL");
14097 debug_tree (TYPE_MAXVAL (t
));
14098 error_found
= true;
14101 /* Check various uses of TYPE_BINFO. */
14102 if (RECORD_OR_UNION_TYPE_P (t
))
14104 if (!TYPE_BINFO (t
))
14106 else if (TREE_CODE (TYPE_BINFO (t
)) != TREE_BINFO
)
14108 error ("TYPE_BINFO is not TREE_BINFO");
14109 debug_tree (TYPE_BINFO (t
));
14110 error_found
= true;
14112 /* FIXME: Java builds invalid empty binfos that do not have
14114 else if (TREE_TYPE (TYPE_BINFO (t
)) != TYPE_MAIN_VARIANT (t
) && 0)
14116 error ("TYPE_BINFO type is not TYPE_MAIN_VARIANT");
14117 debug_tree (TREE_TYPE (TYPE_BINFO (t
)));
14118 error_found
= true;
14121 else if (TYPE_LANG_SLOT_1 (t
) && in_lto_p
)
14123 error ("TYPE_LANG_SLOT_1 (binfo) field is non-NULL");
14124 debug_tree (TYPE_LANG_SLOT_1 (t
));
14125 error_found
= true;
14128 /* Check various uses of TYPE_VALUES_RAW. */
14129 if (TREE_CODE (t
) == ENUMERAL_TYPE
)
14130 for (tree l
= TYPE_VALUES (t
); l
; l
= TREE_CHAIN (l
))
14132 tree value
= TREE_VALUE (l
);
14133 tree name
= TREE_PURPOSE (l
);
14135 /* C FE porduce INTEGER_CST of INTEGER_TYPE, while C++ FE uses
14136 CONST_DECL of ENUMERAL TYPE. */
14137 if (TREE_CODE (value
) != INTEGER_CST
&& TREE_CODE (value
) != CONST_DECL
)
14139 error ("Enum value is not CONST_DECL or INTEGER_CST");
14140 debug_tree (value
);
14142 error_found
= true;
14144 if (TREE_CODE (TREE_TYPE (value
)) != INTEGER_TYPE
14145 && !useless_type_conversion_p (const_cast <tree
> (t
), TREE_TYPE (value
)))
14147 error ("Enum value type is not INTEGER_TYPE nor convertible to the enum");
14148 debug_tree (value
);
14150 error_found
= true;
14152 if (TREE_CODE (name
) != IDENTIFIER_NODE
)
14154 error ("Enum value name is not IDENTIFIER_NODE");
14155 debug_tree (value
);
14157 error_found
= true;
14160 else if (TREE_CODE (t
) == ARRAY_TYPE
)
14162 if (TYPE_DOMAIN (t
) && TREE_CODE (TYPE_DOMAIN (t
)) != INTEGER_TYPE
)
14164 error ("Array TYPE_DOMAIN is not integer type");
14165 debug_tree (TYPE_DOMAIN (t
));
14166 error_found
= true;
14169 else if (RECORD_OR_UNION_TYPE_P (t
))
14171 if (TYPE_FIELDS (t
) && !COMPLETE_TYPE_P (t
) && in_lto_p
)
14173 error ("TYPE_FIELDS defined in incomplete type");
14174 error_found
= true;
14176 for (tree fld
= TYPE_FIELDS (t
); fld
; fld
= TREE_CHAIN (fld
))
14178 /* TODO: verify properties of decls. */
14179 if (TREE_CODE (fld
) == FIELD_DECL
)
14181 else if (TREE_CODE (fld
) == TYPE_DECL
)
14183 else if (TREE_CODE (fld
) == CONST_DECL
)
14185 else if (VAR_P (fld
))
14187 else if (TREE_CODE (fld
) == TEMPLATE_DECL
)
14189 else if (TREE_CODE (fld
) == USING_DECL
)
14193 error ("Wrong tree in TYPE_FIELDS list");
14195 error_found
= true;
14199 else if (TREE_CODE (t
) == INTEGER_TYPE
14200 || TREE_CODE (t
) == BOOLEAN_TYPE
14201 || TREE_CODE (t
) == OFFSET_TYPE
14202 || TREE_CODE (t
) == REFERENCE_TYPE
14203 || TREE_CODE (t
) == NULLPTR_TYPE
14204 || TREE_CODE (t
) == POINTER_TYPE
)
14206 if (TYPE_CACHED_VALUES_P (t
) != (TYPE_CACHED_VALUES (t
) != NULL
))
14208 error ("TYPE_CACHED_VALUES_P is %i while TYPE_CACHED_VALUES is %p",
14209 TYPE_CACHED_VALUES_P (t
), (void *)TYPE_CACHED_VALUES (t
));
14210 error_found
= true;
14212 else if (TYPE_CACHED_VALUES_P (t
) && TREE_CODE (TYPE_CACHED_VALUES (t
)) != TREE_VEC
)
14214 error ("TYPE_CACHED_VALUES is not TREE_VEC");
14215 debug_tree (TYPE_CACHED_VALUES (t
));
14216 error_found
= true;
14218 /* Verify just enough of cache to ensure that no one copied it to new type.
14219 All copying should go by copy_node that should clear it. */
14220 else if (TYPE_CACHED_VALUES_P (t
))
14223 for (i
= 0; i
< TREE_VEC_LENGTH (TYPE_CACHED_VALUES (t
)); i
++)
14224 if (TREE_VEC_ELT (TYPE_CACHED_VALUES (t
), i
)
14225 && TREE_TYPE (TREE_VEC_ELT (TYPE_CACHED_VALUES (t
), i
)) != t
)
14227 error ("wrong TYPE_CACHED_VALUES entry");
14228 debug_tree (TREE_VEC_ELT (TYPE_CACHED_VALUES (t
), i
));
14229 error_found
= true;
14234 else if (TREE_CODE (t
) == FUNCTION_TYPE
|| TREE_CODE (t
) == METHOD_TYPE
)
14235 for (tree l
= TYPE_ARG_TYPES (t
); l
; l
= TREE_CHAIN (l
))
14237 /* C++ FE uses TREE_PURPOSE to store initial values. */
14238 if (TREE_PURPOSE (l
) && in_lto_p
)
14240 error ("TREE_PURPOSE is non-NULL in TYPE_ARG_TYPES list");
14242 error_found
= true;
14244 if (!TYPE_P (TREE_VALUE (l
)))
14246 error ("Wrong entry in TYPE_ARG_TYPES list");
14248 error_found
= true;
14251 else if (!is_lang_specific (t
) && TYPE_VALUES_RAW (t
))
14253 error ("TYPE_VALUES_RAW field is non-NULL");
14254 debug_tree (TYPE_VALUES_RAW (t
));
14255 error_found
= true;
14257 if (TREE_CODE (t
) != INTEGER_TYPE
14258 && TREE_CODE (t
) != BOOLEAN_TYPE
14259 && TREE_CODE (t
) != OFFSET_TYPE
14260 && TREE_CODE (t
) != REFERENCE_TYPE
14261 && TREE_CODE (t
) != NULLPTR_TYPE
14262 && TREE_CODE (t
) != POINTER_TYPE
14263 && TYPE_CACHED_VALUES_P (t
))
14265 error ("TYPE_CACHED_VALUES_P is set while it should not");
14266 error_found
= true;
14268 if (TYPE_STRING_FLAG (t
)
14269 && TREE_CODE (t
) != ARRAY_TYPE
&& TREE_CODE (t
) != INTEGER_TYPE
)
14271 error ("TYPE_STRING_FLAG is set on wrong type code");
14272 error_found
= true;
14274 else if (TYPE_STRING_FLAG (t
))
14277 if (TREE_CODE (b
) == ARRAY_TYPE
)
14279 /* Java builds arrays with TYPE_STRING_FLAG of promoted_char_type
14281 if (TREE_CODE (b
) != INTEGER_TYPE
)
14283 error ("TYPE_STRING_FLAG is set on type that does not look like "
14284 "char nor array of chars");
14285 error_found
= true;
14289 /* ipa-devirt makes an assumption that TYPE_METHOD_BASETYPE is always
14290 TYPE_MAIN_VARIANT and it would be odd to add methods only to variatns
14292 if (TREE_CODE (t
) == METHOD_TYPE
14293 && TYPE_MAIN_VARIANT (TYPE_METHOD_BASETYPE (t
)) != TYPE_METHOD_BASETYPE (t
))
14295 error ("TYPE_METHOD_BASETYPE is not main variant");
14296 error_found
= true;
14301 debug_tree (const_cast <tree
> (t
));
14302 internal_error ("verify_type failed");
14307 /* Return 1 if ARG interpreted as signed in its precision is known to be
14308 always positive or 2 if ARG is known to be always negative, or 3 if
14309 ARG may be positive or negative. */
14312 get_range_pos_neg (tree arg
)
14314 if (arg
== error_mark_node
)
14317 int prec
= TYPE_PRECISION (TREE_TYPE (arg
));
14319 if (TREE_CODE (arg
) == INTEGER_CST
)
14321 wide_int w
= wi::sext (arg
, prec
);
14327 while (CONVERT_EXPR_P (arg
)
14328 && INTEGRAL_TYPE_P (TREE_TYPE (TREE_OPERAND (arg
, 0)))
14329 && TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (arg
, 0))) <= prec
)
14331 arg
= TREE_OPERAND (arg
, 0);
14332 /* Narrower value zero extended into wider type
14333 will always result in positive values. */
14334 if (TYPE_UNSIGNED (TREE_TYPE (arg
))
14335 && TYPE_PRECISION (TREE_TYPE (arg
)) < prec
)
14337 prec
= TYPE_PRECISION (TREE_TYPE (arg
));
14342 if (TREE_CODE (arg
) != SSA_NAME
)
14344 wide_int arg_min
, arg_max
;
14345 while (get_range_info (arg
, &arg_min
, &arg_max
) != VR_RANGE
)
14347 gimple
*g
= SSA_NAME_DEF_STMT (arg
);
14348 if (is_gimple_assign (g
)
14349 && CONVERT_EXPR_CODE_P (gimple_assign_rhs_code (g
)))
14351 tree t
= gimple_assign_rhs1 (g
);
14352 if (INTEGRAL_TYPE_P (TREE_TYPE (t
))
14353 && TYPE_PRECISION (TREE_TYPE (t
)) <= prec
)
14355 if (TYPE_UNSIGNED (TREE_TYPE (t
))
14356 && TYPE_PRECISION (TREE_TYPE (t
)) < prec
)
14358 prec
= TYPE_PRECISION (TREE_TYPE (t
));
14367 if (TYPE_UNSIGNED (TREE_TYPE (arg
)))
14369 /* For unsigned values, the "positive" range comes
14370 below the "negative" range. */
14371 if (!wi::neg_p (wi::sext (arg_max
, prec
), SIGNED
))
14373 if (wi::neg_p (wi::sext (arg_min
, prec
), SIGNED
))
14378 if (!wi::neg_p (wi::sext (arg_min
, prec
), SIGNED
))
14380 if (wi::neg_p (wi::sext (arg_max
, prec
), SIGNED
))
14389 /* Return true if ARG is marked with the nonnull attribute in the
14390 current function signature. */
14393 nonnull_arg_p (const_tree arg
)
14395 tree t
, attrs
, fntype
;
14396 unsigned HOST_WIDE_INT arg_num
;
14398 gcc_assert (TREE_CODE (arg
) == PARM_DECL
14399 && (POINTER_TYPE_P (TREE_TYPE (arg
))
14400 || TREE_CODE (TREE_TYPE (arg
)) == OFFSET_TYPE
));
14402 /* The static chain decl is always non null. */
14403 if (arg
== cfun
->static_chain_decl
)
14406 /* THIS argument of method is always non-NULL. */
14407 if (TREE_CODE (TREE_TYPE (cfun
->decl
)) == METHOD_TYPE
14408 && arg
== DECL_ARGUMENTS (cfun
->decl
)
14409 && flag_delete_null_pointer_checks
)
14412 /* Values passed by reference are always non-NULL. */
14413 if (TREE_CODE (TREE_TYPE (arg
)) == REFERENCE_TYPE
14414 && flag_delete_null_pointer_checks
)
14417 fntype
= TREE_TYPE (cfun
->decl
);
14418 for (attrs
= TYPE_ATTRIBUTES (fntype
); attrs
; attrs
= TREE_CHAIN (attrs
))
14420 attrs
= lookup_attribute ("nonnull", attrs
);
14422 /* If "nonnull" wasn't specified, we know nothing about the argument. */
14423 if (attrs
== NULL_TREE
)
14426 /* If "nonnull" applies to all the arguments, then ARG is non-null. */
14427 if (TREE_VALUE (attrs
) == NULL_TREE
)
14430 /* Get the position number for ARG in the function signature. */
14431 for (arg_num
= 1, t
= DECL_ARGUMENTS (cfun
->decl
);
14433 t
= DECL_CHAIN (t
), arg_num
++)
14439 gcc_assert (t
== arg
);
14441 /* Now see if ARG_NUM is mentioned in the nonnull list. */
14442 for (t
= TREE_VALUE (attrs
); t
; t
= TREE_CHAIN (t
))
14444 if (compare_tree_int (TREE_VALUE (t
), arg_num
) == 0)
14452 /* Combine LOC and BLOCK to a combined adhoc loc, retaining any range
14456 set_block (location_t loc
, tree block
)
14458 location_t pure_loc
= get_pure_location (loc
);
14459 source_range src_range
= get_range_from_loc (line_table
, loc
);
14460 return COMBINE_LOCATION_DATA (line_table
, pure_loc
, src_range
, block
);
14464 set_source_range (tree expr
, location_t start
, location_t finish
)
14466 source_range src_range
;
14467 src_range
.m_start
= start
;
14468 src_range
.m_finish
= finish
;
14469 return set_source_range (expr
, src_range
);
14473 set_source_range (tree expr
, source_range src_range
)
14475 if (!EXPR_P (expr
))
14476 return UNKNOWN_LOCATION
;
14478 location_t pure_loc
= get_pure_location (EXPR_LOCATION (expr
));
14479 location_t adhoc
= COMBINE_LOCATION_DATA (line_table
,
14483 SET_EXPR_LOCATION (expr
, adhoc
);
14487 /* Return the name of combined function FN, for debugging purposes. */
14490 combined_fn_name (combined_fn fn
)
14492 if (builtin_fn_p (fn
))
14494 tree fndecl
= builtin_decl_explicit (as_builtin_fn (fn
));
14495 return IDENTIFIER_POINTER (DECL_NAME (fndecl
));
14498 return internal_fn_name (as_internal_fn (fn
));
14501 /* Return a bitmap with a bit set corresponding to each argument in
14502 a function call type FNTYPE declared with attribute nonnull,
14503 or null if none of the function's argument are nonnull. The caller
14504 must free the bitmap. */
14507 get_nonnull_args (const_tree fntype
)
14509 if (fntype
== NULL_TREE
)
14512 tree attrs
= TYPE_ATTRIBUTES (fntype
);
14516 bitmap argmap
= NULL
;
14518 /* A function declaration can specify multiple attribute nonnull,
14519 each with zero or more arguments. The loop below creates a bitmap
14520 representing a union of all the arguments. An empty (but non-null)
14521 bitmap means that all arguments have been declaraed nonnull. */
14522 for ( ; attrs
; attrs
= TREE_CHAIN (attrs
))
14524 attrs
= lookup_attribute ("nonnull", attrs
);
14529 argmap
= BITMAP_ALLOC (NULL
);
14531 if (!TREE_VALUE (attrs
))
14533 /* Clear the bitmap in case a previous attribute nonnull
14534 set it and this one overrides it for all arguments. */
14535 bitmap_clear (argmap
);
14539 /* Iterate over the indices of the format arguments declared nonnull
14540 and set a bit for each. */
14541 for (tree idx
= TREE_VALUE (attrs
); idx
; idx
= TREE_CHAIN (idx
))
14543 unsigned int val
= TREE_INT_CST_LOW (TREE_VALUE (idx
)) - 1;
14544 bitmap_set_bit (argmap
, val
);
14551 /* List of pointer types used to declare builtins before we have seen their
14554 Keep the size up to date in tree.h ! */
14555 const builtin_structptr_type builtin_structptr_types
[6] =
14557 { fileptr_type_node
, ptr_type_node
, "FILE" },
14558 { const_tm_ptr_type_node
, const_ptr_type_node
, "tm" },
14559 { fenv_t_ptr_type_node
, ptr_type_node
, "fenv_t" },
14560 { const_fenv_t_ptr_type_node
, const_ptr_type_node
, "fenv_t" },
14561 { fexcept_t_ptr_type_node
, ptr_type_node
, "fexcept_t" },
14562 { const_fexcept_t_ptr_type_node
, const_ptr_type_node
, "fexcept_t" }
14567 namespace selftest
{
14569 /* Selftests for tree. */
14571 /* Verify that integer constants are sane. */
14574 test_integer_constants ()
14576 ASSERT_TRUE (integer_type_node
!= NULL
);
14577 ASSERT_TRUE (build_int_cst (integer_type_node
, 0) != NULL
);
14579 tree type
= integer_type_node
;
14581 tree zero
= build_zero_cst (type
);
14582 ASSERT_EQ (INTEGER_CST
, TREE_CODE (zero
));
14583 ASSERT_EQ (type
, TREE_TYPE (zero
));
14585 tree one
= build_int_cst (type
, 1);
14586 ASSERT_EQ (INTEGER_CST
, TREE_CODE (one
));
14587 ASSERT_EQ (type
, TREE_TYPE (zero
));
14590 /* Verify identifiers. */
14593 test_identifiers ()
14595 tree identifier
= get_identifier ("foo");
14596 ASSERT_EQ (3, IDENTIFIER_LENGTH (identifier
));
14597 ASSERT_STREQ ("foo", IDENTIFIER_POINTER (identifier
));
14600 /* Verify LABEL_DECL. */
14605 tree identifier
= get_identifier ("err");
14606 tree label_decl
= build_decl (UNKNOWN_LOCATION
, LABEL_DECL
,
14607 identifier
, void_type_node
);
14608 ASSERT_EQ (-1, LABEL_DECL_UID (label_decl
));
14609 ASSERT_FALSE (FORCED_LABEL (label_decl
));
14612 /* Run all of the selftests within this file. */
14617 test_integer_constants ();
14618 test_identifiers ();
14622 } // namespace selftest
14624 #endif /* CHECKING_P */
14626 #include "gt-tree.h"