1 /* Language-independent node constructors for parse phase of GNU compiler.
2 Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
4 2011 Free Software Foundation, Inc.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
22 /* This file contains the low level primitives for operating on tree nodes,
23 including allocation, list operations, interning of identifiers,
24 construction of data type nodes and statement nodes,
25 and construction of type conversion nodes. It also contains
26 tables index by tree code that describe how to take apart
29 It is intended to be language-independent, but occasionally
30 calls language-dependent routines defined (for C) in typecheck.c. */
34 #include "coretypes.h"
44 #include "filenames.h"
47 #include "common/common-target.h"
48 #include "langhooks.h"
49 #include "tree-inline.h"
50 #include "tree-iterator.h"
51 #include "basic-block.h"
52 #include "tree-flow.h"
54 #include "pointer-set.h"
55 #include "tree-pass.h"
56 #include "langhooks-def.h"
57 #include "diagnostic.h"
58 #include "tree-diagnostic.h"
59 #include "tree-pretty-print.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 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 #ifdef GATHER_STATISTICS
126 /* Statistics-gathering stuff. */
128 static int tree_code_counts
[MAX_TREE_CODES
];
129 int tree_node_counts
[(int) all_kinds
];
130 int tree_node_sizes
[(int) all_kinds
];
132 /* Keep in sync with tree.h:enum tree_node_kind. */
133 static const char * const tree_node_kind_names
[] = {
151 #endif /* GATHER_STATISTICS */
153 /* Unique id for next decl created. */
154 static GTY(()) int next_decl_uid
;
155 /* Unique id for next type created. */
156 static GTY(()) int next_type_uid
= 1;
157 /* Unique id for next debug decl created. Use negative numbers,
158 to catch erroneous uses. */
159 static GTY(()) int next_debug_decl_uid
;
161 /* Since we cannot rehash a type after it is in the table, we have to
162 keep the hash code. */
164 struct GTY(()) type_hash
{
169 /* Initial size of the hash table (rounded to next prime). */
170 #define TYPE_HASH_INITIAL_SIZE 1000
172 /* Now here is the hash table. When recording a type, it is added to
173 the slot whose index is the hash code. Note that the hash table is
174 used for several kinds of types (function types, array types and
175 array index range types, for now). While all these live in the
176 same table, they are completely independent, and the hash code is
177 computed differently for each of these. */
179 static GTY ((if_marked ("type_hash_marked_p"), param_is (struct type_hash
)))
180 htab_t type_hash_table
;
182 /* Hash table and temporary node for larger integer const values. */
183 static GTY (()) tree int_cst_node
;
184 static GTY ((if_marked ("ggc_marked_p"), param_is (union tree_node
)))
185 htab_t int_cst_hash_table
;
187 /* Hash table for optimization flags and target option flags. Use the same
188 hash table for both sets of options. Nodes for building the current
189 optimization and target option nodes. The assumption is most of the time
190 the options created will already be in the hash table, so we avoid
191 allocating and freeing up a node repeatably. */
192 static GTY (()) tree cl_optimization_node
;
193 static GTY (()) tree cl_target_option_node
;
194 static GTY ((if_marked ("ggc_marked_p"), param_is (union tree_node
)))
195 htab_t cl_option_hash_table
;
197 /* General tree->tree mapping structure for use in hash tables. */
200 static GTY ((if_marked ("tree_decl_map_marked_p"), param_is (struct tree_decl_map
)))
201 htab_t debug_expr_for_decl
;
203 static GTY ((if_marked ("tree_decl_map_marked_p"), param_is (struct tree_decl_map
)))
204 htab_t value_expr_for_decl
;
206 static GTY ((if_marked ("tree_vec_map_marked_p"), param_is (struct tree_vec_map
)))
207 htab_t debug_args_for_decl
;
209 static GTY ((if_marked ("tree_priority_map_marked_p"),
210 param_is (struct tree_priority_map
)))
211 htab_t init_priority_for_decl
;
213 static void set_type_quals (tree
, int);
214 static int type_hash_eq (const void *, const void *);
215 static hashval_t
type_hash_hash (const void *);
216 static hashval_t
int_cst_hash_hash (const void *);
217 static int int_cst_hash_eq (const void *, const void *);
218 static hashval_t
cl_option_hash_hash (const void *);
219 static int cl_option_hash_eq (const void *, const void *);
220 static void print_type_hash_statistics (void);
221 static void print_debug_expr_statistics (void);
222 static void print_value_expr_statistics (void);
223 static int type_hash_marked_p (const void *);
224 static unsigned int type_hash_list (const_tree
, hashval_t
);
225 static unsigned int attribute_hash_list (const_tree
, hashval_t
);
227 tree global_trees
[TI_MAX
];
228 tree integer_types
[itk_none
];
230 unsigned char tree_contains_struct
[MAX_TREE_CODES
][64];
232 /* Number of operands for each OpenMP clause. */
233 unsigned const char omp_clause_num_ops
[] =
235 0, /* OMP_CLAUSE_ERROR */
236 1, /* OMP_CLAUSE_PRIVATE */
237 1, /* OMP_CLAUSE_SHARED */
238 1, /* OMP_CLAUSE_FIRSTPRIVATE */
239 2, /* OMP_CLAUSE_LASTPRIVATE */
240 4, /* OMP_CLAUSE_REDUCTION */
241 1, /* OMP_CLAUSE_COPYIN */
242 1, /* OMP_CLAUSE_COPYPRIVATE */
243 1, /* OMP_CLAUSE_IF */
244 1, /* OMP_CLAUSE_NUM_THREADS */
245 1, /* OMP_CLAUSE_SCHEDULE */
246 0, /* OMP_CLAUSE_NOWAIT */
247 0, /* OMP_CLAUSE_ORDERED */
248 0, /* OMP_CLAUSE_DEFAULT */
249 3, /* OMP_CLAUSE_COLLAPSE */
250 0 /* OMP_CLAUSE_UNTIED */
253 const char * const omp_clause_code_name
[] =
274 /* Return the tree node structure used by tree code CODE. */
276 static inline enum tree_node_structure_enum
277 tree_node_structure_for_code (enum tree_code code
)
279 switch (TREE_CODE_CLASS (code
))
281 case tcc_declaration
:
286 return TS_FIELD_DECL
;
292 return TS_LABEL_DECL
;
294 return TS_RESULT_DECL
;
295 case DEBUG_EXPR_DECL
:
298 return TS_CONST_DECL
;
302 return TS_FUNCTION_DECL
;
303 case TRANSLATION_UNIT_DECL
:
304 return TS_TRANSLATION_UNIT_DECL
;
306 return TS_DECL_NON_COMMON
;
310 return TS_TYPE_NON_COMMON
;
319 default: /* tcc_constant and tcc_exceptional */
324 /* tcc_constant cases. */
325 case INTEGER_CST
: return TS_INT_CST
;
326 case REAL_CST
: return TS_REAL_CST
;
327 case FIXED_CST
: return TS_FIXED_CST
;
328 case COMPLEX_CST
: return TS_COMPLEX
;
329 case VECTOR_CST
: return TS_VECTOR
;
330 case STRING_CST
: return TS_STRING
;
331 /* tcc_exceptional cases. */
332 case ERROR_MARK
: return TS_COMMON
;
333 case IDENTIFIER_NODE
: return TS_IDENTIFIER
;
334 case TREE_LIST
: return TS_LIST
;
335 case TREE_VEC
: return TS_VEC
;
336 case SSA_NAME
: return TS_SSA_NAME
;
337 case PLACEHOLDER_EXPR
: return TS_COMMON
;
338 case STATEMENT_LIST
: return TS_STATEMENT_LIST
;
339 case BLOCK
: return TS_BLOCK
;
340 case CONSTRUCTOR
: return TS_CONSTRUCTOR
;
341 case TREE_BINFO
: return TS_BINFO
;
342 case OMP_CLAUSE
: return TS_OMP_CLAUSE
;
343 case OPTIMIZATION_NODE
: return TS_OPTIMIZATION
;
344 case TARGET_OPTION_NODE
: return TS_TARGET_OPTION
;
352 /* Initialize tree_contains_struct to describe the hierarchy of tree
356 initialize_tree_contains_struct (void)
360 for (i
= ERROR_MARK
; i
< LAST_AND_UNUSED_TREE_CODE
; i
++)
363 enum tree_node_structure_enum ts_code
;
365 code
= (enum tree_code
) i
;
366 ts_code
= tree_node_structure_for_code (code
);
368 /* Mark the TS structure itself. */
369 tree_contains_struct
[code
][ts_code
] = 1;
371 /* Mark all the structures that TS is derived from. */
389 case TS_STATEMENT_LIST
:
390 MARK_TS_TYPED (code
);
394 case TS_DECL_MINIMAL
:
400 case TS_OPTIMIZATION
:
401 case TS_TARGET_OPTION
:
402 MARK_TS_COMMON (code
);
405 case TS_TYPE_WITH_LANG_SPECIFIC
:
406 MARK_TS_TYPE_COMMON (code
);
409 case TS_TYPE_NON_COMMON
:
410 MARK_TS_TYPE_WITH_LANG_SPECIFIC (code
);
414 MARK_TS_DECL_MINIMAL (code
);
419 MARK_TS_DECL_COMMON (code
);
422 case TS_DECL_NON_COMMON
:
423 MARK_TS_DECL_WITH_VIS (code
);
426 case TS_DECL_WITH_VIS
:
430 MARK_TS_DECL_WRTL (code
);
434 MARK_TS_DECL_COMMON (code
);
438 MARK_TS_DECL_WITH_VIS (code
);
442 case TS_FUNCTION_DECL
:
443 MARK_TS_DECL_NON_COMMON (code
);
446 case TS_TRANSLATION_UNIT_DECL
:
447 MARK_TS_DECL_COMMON (code
);
455 /* Basic consistency checks for attributes used in fold. */
456 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_NON_COMMON
]);
457 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_NON_COMMON
]);
458 gcc_assert (tree_contains_struct
[CONST_DECL
][TS_DECL_COMMON
]);
459 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_COMMON
]);
460 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_DECL_COMMON
]);
461 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_DECL_COMMON
]);
462 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_COMMON
]);
463 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_COMMON
]);
464 gcc_assert (tree_contains_struct
[TRANSLATION_UNIT_DECL
][TS_DECL_COMMON
]);
465 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_DECL_COMMON
]);
466 gcc_assert (tree_contains_struct
[FIELD_DECL
][TS_DECL_COMMON
]);
467 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_WRTL
]);
468 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_DECL_WRTL
]);
469 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_DECL_WRTL
]);
470 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_WRTL
]);
471 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_DECL_WRTL
]);
472 gcc_assert (tree_contains_struct
[CONST_DECL
][TS_DECL_MINIMAL
]);
473 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_MINIMAL
]);
474 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_DECL_MINIMAL
]);
475 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_DECL_MINIMAL
]);
476 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_MINIMAL
]);
477 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_MINIMAL
]);
478 gcc_assert (tree_contains_struct
[TRANSLATION_UNIT_DECL
][TS_DECL_MINIMAL
]);
479 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_DECL_MINIMAL
]);
480 gcc_assert (tree_contains_struct
[FIELD_DECL
][TS_DECL_MINIMAL
]);
481 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_WITH_VIS
]);
482 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_WITH_VIS
]);
483 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_WITH_VIS
]);
484 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_VAR_DECL
]);
485 gcc_assert (tree_contains_struct
[FIELD_DECL
][TS_FIELD_DECL
]);
486 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_PARM_DECL
]);
487 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_LABEL_DECL
]);
488 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_RESULT_DECL
]);
489 gcc_assert (tree_contains_struct
[CONST_DECL
][TS_CONST_DECL
]);
490 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_TYPE_DECL
]);
491 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_FUNCTION_DECL
]);
492 gcc_assert (tree_contains_struct
[IMPORTED_DECL
][TS_DECL_MINIMAL
]);
493 gcc_assert (tree_contains_struct
[IMPORTED_DECL
][TS_DECL_COMMON
]);
502 /* Initialize the hash table of types. */
503 type_hash_table
= htab_create_ggc (TYPE_HASH_INITIAL_SIZE
, type_hash_hash
,
506 debug_expr_for_decl
= htab_create_ggc (512, tree_decl_map_hash
,
507 tree_decl_map_eq
, 0);
509 value_expr_for_decl
= htab_create_ggc (512, tree_decl_map_hash
,
510 tree_decl_map_eq
, 0);
511 init_priority_for_decl
= htab_create_ggc (512, tree_priority_map_hash
,
512 tree_priority_map_eq
, 0);
514 int_cst_hash_table
= htab_create_ggc (1024, int_cst_hash_hash
,
515 int_cst_hash_eq
, NULL
);
517 int_cst_node
= make_node (INTEGER_CST
);
519 cl_option_hash_table
= htab_create_ggc (64, cl_option_hash_hash
,
520 cl_option_hash_eq
, NULL
);
522 cl_optimization_node
= make_node (OPTIMIZATION_NODE
);
523 cl_target_option_node
= make_node (TARGET_OPTION_NODE
);
525 /* Initialize the tree_contains_struct array. */
526 initialize_tree_contains_struct ();
527 lang_hooks
.init_ts ();
531 /* The name of the object as the assembler will see it (but before any
532 translations made by ASM_OUTPUT_LABELREF). Often this is the same
533 as DECL_NAME. It is an IDENTIFIER_NODE. */
535 decl_assembler_name (tree decl
)
537 if (!DECL_ASSEMBLER_NAME_SET_P (decl
))
538 lang_hooks
.set_decl_assembler_name (decl
);
539 return DECL_WITH_VIS_CHECK (decl
)->decl_with_vis
.assembler_name
;
542 /* Compare ASMNAME with the DECL_ASSEMBLER_NAME of DECL. */
545 decl_assembler_name_equal (tree decl
, const_tree asmname
)
547 tree decl_asmname
= DECL_ASSEMBLER_NAME (decl
);
548 const char *decl_str
;
549 const char *asmname_str
;
552 if (decl_asmname
== asmname
)
555 decl_str
= IDENTIFIER_POINTER (decl_asmname
);
556 asmname_str
= IDENTIFIER_POINTER (asmname
);
559 /* If the target assembler name was set by the user, things are trickier.
560 We have a leading '*' to begin with. After that, it's arguable what
561 is the correct thing to do with -fleading-underscore. Arguably, we've
562 historically been doing the wrong thing in assemble_alias by always
563 printing the leading underscore. Since we're not changing that, make
564 sure user_label_prefix follows the '*' before matching. */
565 if (decl_str
[0] == '*')
567 size_t ulp_len
= strlen (user_label_prefix
);
573 else if (strncmp (decl_str
, user_label_prefix
, ulp_len
) == 0)
574 decl_str
+= ulp_len
, test
=true;
578 if (asmname_str
[0] == '*')
580 size_t ulp_len
= strlen (user_label_prefix
);
586 else if (strncmp (asmname_str
, user_label_prefix
, ulp_len
) == 0)
587 asmname_str
+= ulp_len
, test
=true;
594 return strcmp (decl_str
, asmname_str
) == 0;
597 /* Hash asmnames ignoring the user specified marks. */
600 decl_assembler_name_hash (const_tree asmname
)
602 if (IDENTIFIER_POINTER (asmname
)[0] == '*')
604 const char *decl_str
= IDENTIFIER_POINTER (asmname
) + 1;
605 size_t ulp_len
= strlen (user_label_prefix
);
609 else if (strncmp (decl_str
, user_label_prefix
, ulp_len
) == 0)
612 return htab_hash_string (decl_str
);
615 return htab_hash_string (IDENTIFIER_POINTER (asmname
));
618 /* Compute the number of bytes occupied by a tree with code CODE.
619 This function cannot be used for nodes that have variable sizes,
620 including TREE_VEC, STRING_CST, and CALL_EXPR. */
622 tree_code_size (enum tree_code code
)
624 switch (TREE_CODE_CLASS (code
))
626 case tcc_declaration
: /* A decl node */
631 return sizeof (struct tree_field_decl
);
633 return sizeof (struct tree_parm_decl
);
635 return sizeof (struct tree_var_decl
);
637 return sizeof (struct tree_label_decl
);
639 return sizeof (struct tree_result_decl
);
641 return sizeof (struct tree_const_decl
);
643 return sizeof (struct tree_type_decl
);
645 return sizeof (struct tree_function_decl
);
646 case DEBUG_EXPR_DECL
:
647 return sizeof (struct tree_decl_with_rtl
);
649 return sizeof (struct tree_decl_non_common
);
653 case tcc_type
: /* a type node */
654 return sizeof (struct tree_type_non_common
);
656 case tcc_reference
: /* a reference */
657 case tcc_expression
: /* an expression */
658 case tcc_statement
: /* an expression with side effects */
659 case tcc_comparison
: /* a comparison expression */
660 case tcc_unary
: /* a unary arithmetic expression */
661 case tcc_binary
: /* a binary arithmetic expression */
662 return (sizeof (struct tree_exp
)
663 + (TREE_CODE_LENGTH (code
) - 1) * sizeof (tree
));
665 case tcc_constant
: /* a constant */
668 case INTEGER_CST
: return sizeof (struct tree_int_cst
);
669 case REAL_CST
: return sizeof (struct tree_real_cst
);
670 case FIXED_CST
: return sizeof (struct tree_fixed_cst
);
671 case COMPLEX_CST
: return sizeof (struct tree_complex
);
672 case VECTOR_CST
: return sizeof (struct tree_vector
);
673 case STRING_CST
: gcc_unreachable ();
675 return lang_hooks
.tree_size (code
);
678 case tcc_exceptional
: /* something random, like an identifier. */
681 case IDENTIFIER_NODE
: return lang_hooks
.identifier_size
;
682 case TREE_LIST
: return sizeof (struct tree_list
);
685 case PLACEHOLDER_EXPR
: return sizeof (struct tree_common
);
688 case OMP_CLAUSE
: gcc_unreachable ();
690 case SSA_NAME
: return sizeof (struct tree_ssa_name
);
692 case STATEMENT_LIST
: return sizeof (struct tree_statement_list
);
693 case BLOCK
: return sizeof (struct tree_block
);
694 case CONSTRUCTOR
: return sizeof (struct tree_constructor
);
695 case OPTIMIZATION_NODE
: return sizeof (struct tree_optimization_option
);
696 case TARGET_OPTION_NODE
: return sizeof (struct tree_target_option
);
699 return lang_hooks
.tree_size (code
);
707 /* Compute the number of bytes occupied by NODE. This routine only
708 looks at TREE_CODE, except for those nodes that have variable sizes. */
710 tree_size (const_tree node
)
712 const enum tree_code code
= TREE_CODE (node
);
716 return (offsetof (struct tree_binfo
, base_binfos
)
717 + VEC_embedded_size (tree
, BINFO_N_BASE_BINFOS (node
)));
720 return (sizeof (struct tree_vec
)
721 + (TREE_VEC_LENGTH (node
) - 1) * sizeof (tree
));
724 return TREE_STRING_LENGTH (node
) + offsetof (struct tree_string
, str
) + 1;
727 return (sizeof (struct tree_omp_clause
)
728 + (omp_clause_num_ops
[OMP_CLAUSE_CODE (node
)] - 1)
732 if (TREE_CODE_CLASS (code
) == tcc_vl_exp
)
733 return (sizeof (struct tree_exp
)
734 + (VL_EXP_OPERAND_LENGTH (node
) - 1) * sizeof (tree
));
736 return tree_code_size (code
);
740 /* Record interesting allocation statistics for a tree node with CODE
744 record_node_allocation_statistics (enum tree_code code ATTRIBUTE_UNUSED
,
745 size_t length ATTRIBUTE_UNUSED
)
747 #ifdef GATHER_STATISTICS
748 enum tree_code_class type
= TREE_CODE_CLASS (code
);
753 case tcc_declaration
: /* A decl node */
757 case tcc_type
: /* a type node */
761 case tcc_statement
: /* an expression with side effects */
765 case tcc_reference
: /* a reference */
769 case tcc_expression
: /* an expression */
770 case tcc_comparison
: /* a comparison expression */
771 case tcc_unary
: /* a unary arithmetic expression */
772 case tcc_binary
: /* a binary arithmetic expression */
776 case tcc_constant
: /* a constant */
780 case tcc_exceptional
: /* something random, like an identifier. */
783 case IDENTIFIER_NODE
:
796 kind
= ssa_name_kind
;
808 kind
= omp_clause_kind
;
825 tree_code_counts
[(int) code
]++;
826 tree_node_counts
[(int) kind
]++;
827 tree_node_sizes
[(int) kind
] += length
;
831 /* Allocate and return a new UID from the DECL_UID namespace. */
834 allocate_decl_uid (void)
836 return next_decl_uid
++;
839 /* Return a newly allocated node of code CODE. For decl and type
840 nodes, some other fields are initialized. The rest of the node is
841 initialized to zero. This function cannot be used for TREE_VEC or
842 OMP_CLAUSE nodes, which is enforced by asserts in tree_code_size.
844 Achoo! I got a code in the node. */
847 make_node_stat (enum tree_code code MEM_STAT_DECL
)
850 enum tree_code_class type
= TREE_CODE_CLASS (code
);
851 size_t length
= tree_code_size (code
);
853 record_node_allocation_statistics (code
, length
);
855 t
= ggc_alloc_zone_cleared_tree_node_stat (
856 (code
== IDENTIFIER_NODE
) ? &tree_id_zone
: &tree_zone
,
857 length PASS_MEM_STAT
);
858 TREE_SET_CODE (t
, code
);
863 TREE_SIDE_EFFECTS (t
) = 1;
866 case tcc_declaration
:
867 if (CODE_CONTAINS_STRUCT (code
, TS_DECL_COMMON
))
869 if (code
== FUNCTION_DECL
)
871 DECL_ALIGN (t
) = FUNCTION_BOUNDARY
;
872 DECL_MODE (t
) = FUNCTION_MODE
;
877 DECL_SOURCE_LOCATION (t
) = input_location
;
878 if (TREE_CODE (t
) == DEBUG_EXPR_DECL
)
879 DECL_UID (t
) = --next_debug_decl_uid
;
882 DECL_UID (t
) = allocate_decl_uid ();
883 SET_DECL_PT_UID (t
, -1);
885 if (TREE_CODE (t
) == LABEL_DECL
)
886 LABEL_DECL_UID (t
) = -1;
891 TYPE_UID (t
) = next_type_uid
++;
892 TYPE_ALIGN (t
) = BITS_PER_UNIT
;
893 TYPE_USER_ALIGN (t
) = 0;
894 TYPE_MAIN_VARIANT (t
) = t
;
895 TYPE_CANONICAL (t
) = t
;
897 /* Default to no attributes for type, but let target change that. */
898 TYPE_ATTRIBUTES (t
) = NULL_TREE
;
899 targetm
.set_default_type_attributes (t
);
901 /* We have not yet computed the alias set for this type. */
902 TYPE_ALIAS_SET (t
) = -1;
906 TREE_CONSTANT (t
) = 1;
915 case PREDECREMENT_EXPR
:
916 case PREINCREMENT_EXPR
:
917 case POSTDECREMENT_EXPR
:
918 case POSTINCREMENT_EXPR
:
919 /* All of these have side-effects, no matter what their
921 TREE_SIDE_EFFECTS (t
) = 1;
930 /* Other classes need no special treatment. */
937 /* Return a new node with the same contents as NODE except that its
938 TREE_CHAIN, if it has one, is zero and it has a fresh uid. */
941 copy_node_stat (tree node MEM_STAT_DECL
)
944 enum tree_code code
= TREE_CODE (node
);
947 gcc_assert (code
!= STATEMENT_LIST
);
949 length
= tree_size (node
);
950 record_node_allocation_statistics (code
, length
);
951 t
= ggc_alloc_zone_tree_node_stat (&tree_zone
, length PASS_MEM_STAT
);
952 memcpy (t
, node
, length
);
954 if (CODE_CONTAINS_STRUCT (code
, TS_COMMON
))
956 TREE_ASM_WRITTEN (t
) = 0;
957 TREE_VISITED (t
) = 0;
958 if (code
== VAR_DECL
|| code
== PARM_DECL
|| code
== RESULT_DECL
)
959 *DECL_VAR_ANN_PTR (t
) = 0;
961 if (TREE_CODE_CLASS (code
) == tcc_declaration
)
963 if (code
== DEBUG_EXPR_DECL
)
964 DECL_UID (t
) = --next_debug_decl_uid
;
967 DECL_UID (t
) = allocate_decl_uid ();
968 if (DECL_PT_UID_SET_P (node
))
969 SET_DECL_PT_UID (t
, DECL_PT_UID (node
));
971 if ((TREE_CODE (node
) == PARM_DECL
|| TREE_CODE (node
) == VAR_DECL
)
972 && DECL_HAS_VALUE_EXPR_P (node
))
974 SET_DECL_VALUE_EXPR (t
, DECL_VALUE_EXPR (node
));
975 DECL_HAS_VALUE_EXPR_P (t
) = 1;
977 if (TREE_CODE (node
) == VAR_DECL
&& DECL_HAS_INIT_PRIORITY_P (node
))
979 SET_DECL_INIT_PRIORITY (t
, DECL_INIT_PRIORITY (node
));
980 DECL_HAS_INIT_PRIORITY_P (t
) = 1;
983 else if (TREE_CODE_CLASS (code
) == tcc_type
)
985 TYPE_UID (t
) = next_type_uid
++;
986 /* The following is so that the debug code for
987 the copy is different from the original type.
988 The two statements usually duplicate each other
989 (because they clear fields of the same union),
990 but the optimizer should catch that. */
991 TYPE_SYMTAB_POINTER (t
) = 0;
992 TYPE_SYMTAB_ADDRESS (t
) = 0;
994 /* Do not copy the values cache. */
995 if (TYPE_CACHED_VALUES_P(t
))
997 TYPE_CACHED_VALUES_P (t
) = 0;
998 TYPE_CACHED_VALUES (t
) = NULL_TREE
;
1005 /* Return a copy of a chain of nodes, chained through the TREE_CHAIN field.
1006 For example, this can copy a list made of TREE_LIST nodes. */
1009 copy_list (tree list
)
1017 head
= prev
= copy_node (list
);
1018 next
= TREE_CHAIN (list
);
1021 TREE_CHAIN (prev
) = copy_node (next
);
1022 prev
= TREE_CHAIN (prev
);
1023 next
= TREE_CHAIN (next
);
1029 /* Create an INT_CST node with a LOW value sign extended to TYPE. */
1032 build_int_cst (tree type
, HOST_WIDE_INT low
)
1034 /* Support legacy code. */
1036 type
= integer_type_node
;
1038 return double_int_to_tree (type
, shwi_to_double_int (low
));
1041 /* Create an INT_CST node with a LOW value sign extended to TYPE. */
1044 build_int_cst_type (tree type
, HOST_WIDE_INT low
)
1048 return double_int_to_tree (type
, shwi_to_double_int (low
));
1051 /* Constructs tree in type TYPE from with value given by CST. Signedness
1052 of CST is assumed to be the same as the signedness of TYPE. */
1055 double_int_to_tree (tree type
, double_int cst
)
1057 /* Size types *are* sign extended. */
1058 bool sign_extended_type
= (!TYPE_UNSIGNED (type
)
1059 || (TREE_CODE (type
) == INTEGER_TYPE
1060 && TYPE_IS_SIZETYPE (type
)));
1062 cst
= double_int_ext (cst
, TYPE_PRECISION (type
), !sign_extended_type
);
1064 return build_int_cst_wide (type
, cst
.low
, cst
.high
);
1067 /* Returns true if CST fits into range of TYPE. Signedness of CST is assumed
1068 to be the same as the signedness of TYPE. */
1071 double_int_fits_to_tree_p (const_tree type
, double_int cst
)
1073 /* Size types *are* sign extended. */
1074 bool sign_extended_type
= (!TYPE_UNSIGNED (type
)
1075 || (TREE_CODE (type
) == INTEGER_TYPE
1076 && TYPE_IS_SIZETYPE (type
)));
1079 = double_int_ext (cst
, TYPE_PRECISION (type
), !sign_extended_type
);
1081 return double_int_equal_p (cst
, ext
);
1084 /* We force the double_int CST to the range of the type TYPE by sign or
1085 zero extending it. OVERFLOWABLE indicates if we are interested in
1086 overflow of the value, when >0 we are only interested in signed
1087 overflow, for <0 we are interested in any overflow. OVERFLOWED
1088 indicates whether overflow has already occurred. CONST_OVERFLOWED
1089 indicates whether constant overflow has already occurred. We force
1090 T's value to be within range of T's type (by setting to 0 or 1 all
1091 the bits outside the type's range). We set TREE_OVERFLOWED if,
1092 OVERFLOWED is nonzero,
1093 or OVERFLOWABLE is >0 and signed overflow occurs
1094 or OVERFLOWABLE is <0 and any overflow occurs
1095 We return a new tree node for the extended double_int. The node
1096 is shared if no overflow flags are set. */
1100 force_fit_type_double (tree type
, double_int cst
, int overflowable
,
1103 bool sign_extended_type
;
1105 /* Size types *are* sign extended. */
1106 sign_extended_type
= (!TYPE_UNSIGNED (type
)
1107 || (TREE_CODE (type
) == INTEGER_TYPE
1108 && TYPE_IS_SIZETYPE (type
)));
1110 /* If we need to set overflow flags, return a new unshared node. */
1111 if (overflowed
|| !double_int_fits_to_tree_p(type
, cst
))
1115 || (overflowable
> 0 && sign_extended_type
))
1117 tree t
= make_node (INTEGER_CST
);
1118 TREE_INT_CST (t
) = double_int_ext (cst
, TYPE_PRECISION (type
),
1119 !sign_extended_type
);
1120 TREE_TYPE (t
) = type
;
1121 TREE_OVERFLOW (t
) = 1;
1126 /* Else build a shared node. */
1127 return double_int_to_tree (type
, cst
);
1130 /* These are the hash table functions for the hash table of INTEGER_CST
1131 nodes of a sizetype. */
1133 /* Return the hash code code X, an INTEGER_CST. */
1136 int_cst_hash_hash (const void *x
)
1138 const_tree
const t
= (const_tree
) x
;
1140 return (TREE_INT_CST_HIGH (t
) ^ TREE_INT_CST_LOW (t
)
1141 ^ htab_hash_pointer (TREE_TYPE (t
)));
1144 /* Return nonzero if the value represented by *X (an INTEGER_CST tree node)
1145 is the same as that given by *Y, which is the same. */
1148 int_cst_hash_eq (const void *x
, const void *y
)
1150 const_tree
const xt
= (const_tree
) x
;
1151 const_tree
const yt
= (const_tree
) y
;
1153 return (TREE_TYPE (xt
) == TREE_TYPE (yt
)
1154 && TREE_INT_CST_HIGH (xt
) == TREE_INT_CST_HIGH (yt
)
1155 && TREE_INT_CST_LOW (xt
) == TREE_INT_CST_LOW (yt
));
1158 /* Create an INT_CST node of TYPE and value HI:LOW.
1159 The returned node is always shared. For small integers we use a
1160 per-type vector cache, for larger ones we use a single hash table. */
1163 build_int_cst_wide (tree type
, unsigned HOST_WIDE_INT low
, HOST_WIDE_INT hi
)
1171 switch (TREE_CODE (type
))
1174 gcc_assert (hi
== 0 && low
== 0);
1178 case REFERENCE_TYPE
:
1179 /* Cache NULL pointer. */
1188 /* Cache false or true. */
1196 if (TYPE_UNSIGNED (type
))
1199 limit
= INTEGER_SHARE_LIMIT
;
1200 if (!hi
&& low
< (unsigned HOST_WIDE_INT
)INTEGER_SHARE_LIMIT
)
1206 limit
= INTEGER_SHARE_LIMIT
+ 1;
1207 if (!hi
&& low
< (unsigned HOST_WIDE_INT
)INTEGER_SHARE_LIMIT
)
1209 else if (hi
== -1 && low
== -(unsigned HOST_WIDE_INT
)1)
1223 /* Look for it in the type's vector of small shared ints. */
1224 if (!TYPE_CACHED_VALUES_P (type
))
1226 TYPE_CACHED_VALUES_P (type
) = 1;
1227 TYPE_CACHED_VALUES (type
) = make_tree_vec (limit
);
1230 t
= TREE_VEC_ELT (TYPE_CACHED_VALUES (type
), ix
);
1233 /* Make sure no one is clobbering the shared constant. */
1234 gcc_assert (TREE_TYPE (t
) == type
);
1235 gcc_assert (TREE_INT_CST_LOW (t
) == low
);
1236 gcc_assert (TREE_INT_CST_HIGH (t
) == hi
);
1240 /* Create a new shared int. */
1241 t
= make_node (INTEGER_CST
);
1243 TREE_INT_CST_LOW (t
) = low
;
1244 TREE_INT_CST_HIGH (t
) = hi
;
1245 TREE_TYPE (t
) = type
;
1247 TREE_VEC_ELT (TYPE_CACHED_VALUES (type
), ix
) = t
;
1252 /* Use the cache of larger shared ints. */
1255 TREE_INT_CST_LOW (int_cst_node
) = low
;
1256 TREE_INT_CST_HIGH (int_cst_node
) = hi
;
1257 TREE_TYPE (int_cst_node
) = type
;
1259 slot
= htab_find_slot (int_cst_hash_table
, int_cst_node
, INSERT
);
1263 /* Insert this one into the hash table. */
1266 /* Make a new node for next time round. */
1267 int_cst_node
= make_node (INTEGER_CST
);
1274 /* Builds an integer constant in TYPE such that lowest BITS bits are ones
1275 and the rest are zeros. */
1278 build_low_bits_mask (tree type
, unsigned bits
)
1282 gcc_assert (bits
<= TYPE_PRECISION (type
));
1284 if (bits
== TYPE_PRECISION (type
)
1285 && !TYPE_UNSIGNED (type
))
1286 /* Sign extended all-ones mask. */
1287 mask
= double_int_minus_one
;
1289 mask
= double_int_mask (bits
);
1291 return build_int_cst_wide (type
, mask
.low
, mask
.high
);
1294 /* Checks that X is integer constant that can be expressed in (unsigned)
1295 HOST_WIDE_INT without loss of precision. */
1298 cst_and_fits_in_hwi (const_tree x
)
1300 if (TREE_CODE (x
) != INTEGER_CST
)
1303 if (TYPE_PRECISION (TREE_TYPE (x
)) > HOST_BITS_PER_WIDE_INT
)
1306 return (TREE_INT_CST_HIGH (x
) == 0
1307 || TREE_INT_CST_HIGH (x
) == -1);
1310 /* Return a new VECTOR_CST node whose type is TYPE and whose values
1311 are in a list pointed to by VALS. */
1314 build_vector (tree type
, tree vals
)
1316 tree v
= make_node (VECTOR_CST
);
1321 TREE_VECTOR_CST_ELTS (v
) = vals
;
1322 TREE_TYPE (v
) = type
;
1324 /* Iterate through elements and check for overflow. */
1325 for (link
= vals
; link
; link
= TREE_CHAIN (link
))
1327 tree value
= TREE_VALUE (link
);
1330 /* Don't crash if we get an address constant. */
1331 if (!CONSTANT_CLASS_P (value
))
1334 over
|= TREE_OVERFLOW (value
);
1337 gcc_assert (cnt
== TYPE_VECTOR_SUBPARTS (type
));
1339 TREE_OVERFLOW (v
) = over
;
1343 /* Return a new VECTOR_CST node whose type is TYPE and whose values
1344 are extracted from V, a vector of CONSTRUCTOR_ELT. */
1347 build_vector_from_ctor (tree type
, VEC(constructor_elt
,gc
) *v
)
1349 tree list
= NULL_TREE
;
1350 unsigned HOST_WIDE_INT idx
;
1353 FOR_EACH_CONSTRUCTOR_VALUE (v
, idx
, value
)
1354 list
= tree_cons (NULL_TREE
, value
, list
);
1355 for (; idx
< TYPE_VECTOR_SUBPARTS (type
); ++idx
)
1356 list
= tree_cons (NULL_TREE
,
1357 build_zero_cst (TREE_TYPE (type
)), list
);
1358 return build_vector (type
, nreverse (list
));
1361 /* Build a vector of type VECTYPE where all the elements are SCs. */
1363 build_vector_from_val (tree vectype
, tree sc
)
1365 int i
, nunits
= TYPE_VECTOR_SUBPARTS (vectype
);
1366 VEC(constructor_elt
, gc
) *v
= NULL
;
1368 if (sc
== error_mark_node
)
1371 /* Verify that the vector type is suitable for SC. Note that there
1372 is some inconsistency in the type-system with respect to restrict
1373 qualifications of pointers. Vector types always have a main-variant
1374 element type and the qualification is applied to the vector-type.
1375 So TREE_TYPE (vector-type) does not return a properly qualified
1376 vector element-type. */
1377 gcc_checking_assert (types_compatible_p (TYPE_MAIN_VARIANT (TREE_TYPE (sc
)),
1378 TREE_TYPE (vectype
)));
1380 v
= VEC_alloc (constructor_elt
, gc
, nunits
);
1381 for (i
= 0; i
< nunits
; ++i
)
1382 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, sc
);
1384 if (CONSTANT_CLASS_P (sc
))
1385 return build_vector_from_ctor (vectype
, v
);
1387 return build_constructor (vectype
, v
);
1390 /* Return a new CONSTRUCTOR node whose type is TYPE and whose values
1391 are in the VEC pointed to by VALS. */
1393 build_constructor (tree type
, VEC(constructor_elt
,gc
) *vals
)
1395 tree c
= make_node (CONSTRUCTOR
);
1397 constructor_elt
*elt
;
1398 bool constant_p
= true;
1400 TREE_TYPE (c
) = type
;
1401 CONSTRUCTOR_ELTS (c
) = vals
;
1403 FOR_EACH_VEC_ELT (constructor_elt
, vals
, i
, elt
)
1404 if (!TREE_CONSTANT (elt
->value
))
1410 TREE_CONSTANT (c
) = constant_p
;
1415 /* Build a CONSTRUCTOR node made of a single initializer, with the specified
1418 build_constructor_single (tree type
, tree index
, tree value
)
1420 VEC(constructor_elt
,gc
) *v
;
1421 constructor_elt
*elt
;
1423 v
= VEC_alloc (constructor_elt
, gc
, 1);
1424 elt
= VEC_quick_push (constructor_elt
, v
, NULL
);
1428 return build_constructor (type
, v
);
1432 /* Return a new CONSTRUCTOR node whose type is TYPE and whose values
1433 are in a list pointed to by VALS. */
1435 build_constructor_from_list (tree type
, tree vals
)
1438 VEC(constructor_elt
,gc
) *v
= NULL
;
1442 v
= VEC_alloc (constructor_elt
, gc
, list_length (vals
));
1443 for (t
= vals
; t
; t
= TREE_CHAIN (t
))
1444 CONSTRUCTOR_APPEND_ELT (v
, TREE_PURPOSE (t
), TREE_VALUE (t
));
1447 return build_constructor (type
, v
);
1450 /* Return a new FIXED_CST node whose type is TYPE and value is F. */
1453 build_fixed (tree type
, FIXED_VALUE_TYPE f
)
1456 FIXED_VALUE_TYPE
*fp
;
1458 v
= make_node (FIXED_CST
);
1459 fp
= ggc_alloc_fixed_value ();
1460 memcpy (fp
, &f
, sizeof (FIXED_VALUE_TYPE
));
1462 TREE_TYPE (v
) = type
;
1463 TREE_FIXED_CST_PTR (v
) = fp
;
1467 /* Return a new REAL_CST node whose type is TYPE and value is D. */
1470 build_real (tree type
, REAL_VALUE_TYPE d
)
1473 REAL_VALUE_TYPE
*dp
;
1476 /* ??? Used to check for overflow here via CHECK_FLOAT_TYPE.
1477 Consider doing it via real_convert now. */
1479 v
= make_node (REAL_CST
);
1480 dp
= ggc_alloc_real_value ();
1481 memcpy (dp
, &d
, sizeof (REAL_VALUE_TYPE
));
1483 TREE_TYPE (v
) = type
;
1484 TREE_REAL_CST_PTR (v
) = dp
;
1485 TREE_OVERFLOW (v
) = overflow
;
1489 /* Return a new REAL_CST node whose type is TYPE
1490 and whose value is the integer value of the INTEGER_CST node I. */
1493 real_value_from_int_cst (const_tree type
, const_tree i
)
1497 /* Clear all bits of the real value type so that we can later do
1498 bitwise comparisons to see if two values are the same. */
1499 memset (&d
, 0, sizeof d
);
1501 real_from_integer (&d
, type
? TYPE_MODE (type
) : VOIDmode
,
1502 TREE_INT_CST_LOW (i
), TREE_INT_CST_HIGH (i
),
1503 TYPE_UNSIGNED (TREE_TYPE (i
)));
1507 /* Given a tree representing an integer constant I, return a tree
1508 representing the same value as a floating-point constant of type TYPE. */
1511 build_real_from_int_cst (tree type
, const_tree i
)
1514 int overflow
= TREE_OVERFLOW (i
);
1516 v
= build_real (type
, real_value_from_int_cst (type
, i
));
1518 TREE_OVERFLOW (v
) |= overflow
;
1522 /* Return a newly constructed STRING_CST node whose value is
1523 the LEN characters at STR.
1524 The TREE_TYPE is not initialized. */
1527 build_string (int len
, const char *str
)
1532 /* Do not waste bytes provided by padding of struct tree_string. */
1533 length
= len
+ offsetof (struct tree_string
, str
) + 1;
1535 record_node_allocation_statistics (STRING_CST
, length
);
1537 s
= ggc_alloc_tree_node (length
);
1539 memset (s
, 0, sizeof (struct tree_typed
));
1540 TREE_SET_CODE (s
, STRING_CST
);
1541 TREE_CONSTANT (s
) = 1;
1542 TREE_STRING_LENGTH (s
) = len
;
1543 memcpy (s
->string
.str
, str
, len
);
1544 s
->string
.str
[len
] = '\0';
1549 /* Return a newly constructed COMPLEX_CST node whose value is
1550 specified by the real and imaginary parts REAL and IMAG.
1551 Both REAL and IMAG should be constant nodes. TYPE, if specified,
1552 will be the type of the COMPLEX_CST; otherwise a new type will be made. */
1555 build_complex (tree type
, tree real
, tree imag
)
1557 tree t
= make_node (COMPLEX_CST
);
1559 TREE_REALPART (t
) = real
;
1560 TREE_IMAGPART (t
) = imag
;
1561 TREE_TYPE (t
) = type
? type
: build_complex_type (TREE_TYPE (real
));
1562 TREE_OVERFLOW (t
) = TREE_OVERFLOW (real
) | TREE_OVERFLOW (imag
);
1566 /* Return a constant of arithmetic type TYPE which is the
1567 multiplicative identity of the set TYPE. */
1570 build_one_cst (tree type
)
1572 switch (TREE_CODE (type
))
1574 case INTEGER_TYPE
: case ENUMERAL_TYPE
: case BOOLEAN_TYPE
:
1575 case POINTER_TYPE
: case REFERENCE_TYPE
:
1577 return build_int_cst (type
, 1);
1580 return build_real (type
, dconst1
);
1582 case FIXED_POINT_TYPE
:
1583 /* We can only generate 1 for accum types. */
1584 gcc_assert (ALL_SCALAR_ACCUM_MODE_P (TYPE_MODE (type
)));
1585 return build_fixed (type
, FCONST1(TYPE_MODE (type
)));
1589 tree scalar
= build_one_cst (TREE_TYPE (type
));
1591 return build_vector_from_val (type
, scalar
);
1595 return build_complex (type
,
1596 build_one_cst (TREE_TYPE (type
)),
1597 build_zero_cst (TREE_TYPE (type
)));
1604 /* Build 0 constant of type TYPE. This is used by constructor folding
1605 and thus the constant should be represented in memory by
1609 build_zero_cst (tree type
)
1611 switch (TREE_CODE (type
))
1613 case INTEGER_TYPE
: case ENUMERAL_TYPE
: case BOOLEAN_TYPE
:
1614 case POINTER_TYPE
: case REFERENCE_TYPE
:
1616 return build_int_cst (type
, 0);
1619 return build_real (type
, dconst0
);
1621 case FIXED_POINT_TYPE
:
1622 return build_fixed (type
, FCONST0 (TYPE_MODE (type
)));
1626 tree scalar
= build_zero_cst (TREE_TYPE (type
));
1628 return build_vector_from_val (type
, scalar
);
1633 tree zero
= build_zero_cst (TREE_TYPE (type
));
1635 return build_complex (type
, zero
, zero
);
1639 if (!AGGREGATE_TYPE_P (type
))
1640 return fold_convert (type
, integer_zero_node
);
1641 return build_constructor (type
, NULL
);
1646 /* Build a BINFO with LEN language slots. */
1649 make_tree_binfo_stat (unsigned base_binfos MEM_STAT_DECL
)
1652 size_t length
= (offsetof (struct tree_binfo
, base_binfos
)
1653 + VEC_embedded_size (tree
, base_binfos
));
1655 record_node_allocation_statistics (TREE_BINFO
, length
);
1657 t
= ggc_alloc_zone_tree_node_stat (&tree_zone
, length PASS_MEM_STAT
);
1659 memset (t
, 0, offsetof (struct tree_binfo
, base_binfos
));
1661 TREE_SET_CODE (t
, TREE_BINFO
);
1663 VEC_embedded_init (tree
, BINFO_BASE_BINFOS (t
), base_binfos
);
1668 /* Create a CASE_LABEL_EXPR tree node and return it. */
1671 build_case_label (tree low_value
, tree high_value
, tree label_decl
)
1673 tree t
= make_node (CASE_LABEL_EXPR
);
1675 TREE_TYPE (t
) = void_type_node
;
1676 SET_EXPR_LOCATION (t
, DECL_SOURCE_LOCATION (label_decl
));
1678 CASE_LOW (t
) = low_value
;
1679 CASE_HIGH (t
) = high_value
;
1680 CASE_LABEL (t
) = label_decl
;
1681 CASE_CHAIN (t
) = NULL_TREE
;
1686 /* Build a newly constructed TREE_VEC node of length LEN. */
1689 make_tree_vec_stat (int len MEM_STAT_DECL
)
1692 int length
= (len
- 1) * sizeof (tree
) + sizeof (struct tree_vec
);
1694 record_node_allocation_statistics (TREE_VEC
, length
);
1696 t
= ggc_alloc_zone_cleared_tree_node_stat (&tree_zone
, length PASS_MEM_STAT
);
1698 TREE_SET_CODE (t
, TREE_VEC
);
1699 TREE_VEC_LENGTH (t
) = len
;
1704 /* Return 1 if EXPR is the integer constant zero or a complex constant
1708 integer_zerop (const_tree expr
)
1712 return ((TREE_CODE (expr
) == INTEGER_CST
1713 && TREE_INT_CST_LOW (expr
) == 0
1714 && TREE_INT_CST_HIGH (expr
) == 0)
1715 || (TREE_CODE (expr
) == COMPLEX_CST
1716 && integer_zerop (TREE_REALPART (expr
))
1717 && integer_zerop (TREE_IMAGPART (expr
))));
1720 /* Return 1 if EXPR is the integer constant one or the corresponding
1721 complex constant. */
1724 integer_onep (const_tree expr
)
1728 return ((TREE_CODE (expr
) == INTEGER_CST
1729 && TREE_INT_CST_LOW (expr
) == 1
1730 && TREE_INT_CST_HIGH (expr
) == 0)
1731 || (TREE_CODE (expr
) == COMPLEX_CST
1732 && integer_onep (TREE_REALPART (expr
))
1733 && integer_zerop (TREE_IMAGPART (expr
))));
1736 /* Return 1 if EXPR is an integer containing all 1's in as much precision as
1737 it contains. Likewise for the corresponding complex constant. */
1740 integer_all_onesp (const_tree expr
)
1747 if (TREE_CODE (expr
) == COMPLEX_CST
1748 && integer_all_onesp (TREE_REALPART (expr
))
1749 && integer_zerop (TREE_IMAGPART (expr
)))
1752 else if (TREE_CODE (expr
) != INTEGER_CST
)
1755 uns
= TYPE_UNSIGNED (TREE_TYPE (expr
));
1756 if (TREE_INT_CST_LOW (expr
) == ~(unsigned HOST_WIDE_INT
) 0
1757 && TREE_INT_CST_HIGH (expr
) == -1)
1762 /* Note that using TYPE_PRECISION here is wrong. We care about the
1763 actual bits, not the (arbitrary) range of the type. */
1764 prec
= GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (expr
)));
1765 if (prec
>= HOST_BITS_PER_WIDE_INT
)
1767 HOST_WIDE_INT high_value
;
1770 shift_amount
= prec
- HOST_BITS_PER_WIDE_INT
;
1772 /* Can not handle precisions greater than twice the host int size. */
1773 gcc_assert (shift_amount
<= HOST_BITS_PER_WIDE_INT
);
1774 if (shift_amount
== HOST_BITS_PER_WIDE_INT
)
1775 /* Shifting by the host word size is undefined according to the ANSI
1776 standard, so we must handle this as a special case. */
1779 high_value
= ((HOST_WIDE_INT
) 1 << shift_amount
) - 1;
1781 return (TREE_INT_CST_LOW (expr
) == ~(unsigned HOST_WIDE_INT
) 0
1782 && TREE_INT_CST_HIGH (expr
) == high_value
);
1785 return TREE_INT_CST_LOW (expr
) == ((unsigned HOST_WIDE_INT
) 1 << prec
) - 1;
1788 /* Return 1 if EXPR is an integer constant that is a power of 2 (i.e., has only
1792 integer_pow2p (const_tree expr
)
1795 HOST_WIDE_INT high
, low
;
1799 if (TREE_CODE (expr
) == COMPLEX_CST
1800 && integer_pow2p (TREE_REALPART (expr
))
1801 && integer_zerop (TREE_IMAGPART (expr
)))
1804 if (TREE_CODE (expr
) != INTEGER_CST
)
1807 prec
= TYPE_PRECISION (TREE_TYPE (expr
));
1808 high
= TREE_INT_CST_HIGH (expr
);
1809 low
= TREE_INT_CST_LOW (expr
);
1811 /* First clear all bits that are beyond the type's precision in case
1812 we've been sign extended. */
1814 if (prec
== 2 * HOST_BITS_PER_WIDE_INT
)
1816 else if (prec
> HOST_BITS_PER_WIDE_INT
)
1817 high
&= ~((HOST_WIDE_INT
) (-1) << (prec
- HOST_BITS_PER_WIDE_INT
));
1821 if (prec
< HOST_BITS_PER_WIDE_INT
)
1822 low
&= ~((HOST_WIDE_INT
) (-1) << prec
);
1825 if (high
== 0 && low
== 0)
1828 return ((high
== 0 && (low
& (low
- 1)) == 0)
1829 || (low
== 0 && (high
& (high
- 1)) == 0));
1832 /* Return 1 if EXPR is an integer constant other than zero or a
1833 complex constant other than zero. */
1836 integer_nonzerop (const_tree expr
)
1840 return ((TREE_CODE (expr
) == INTEGER_CST
1841 && (TREE_INT_CST_LOW (expr
) != 0
1842 || TREE_INT_CST_HIGH (expr
) != 0))
1843 || (TREE_CODE (expr
) == COMPLEX_CST
1844 && (integer_nonzerop (TREE_REALPART (expr
))
1845 || integer_nonzerop (TREE_IMAGPART (expr
)))));
1848 /* Return 1 if EXPR is the fixed-point constant zero. */
1851 fixed_zerop (const_tree expr
)
1853 return (TREE_CODE (expr
) == FIXED_CST
1854 && double_int_zero_p (TREE_FIXED_CST (expr
).data
));
1857 /* Return the power of two represented by a tree node known to be a
1861 tree_log2 (const_tree expr
)
1864 HOST_WIDE_INT high
, low
;
1868 if (TREE_CODE (expr
) == COMPLEX_CST
)
1869 return tree_log2 (TREE_REALPART (expr
));
1871 prec
= TYPE_PRECISION (TREE_TYPE (expr
));
1872 high
= TREE_INT_CST_HIGH (expr
);
1873 low
= TREE_INT_CST_LOW (expr
);
1875 /* First clear all bits that are beyond the type's precision in case
1876 we've been sign extended. */
1878 if (prec
== 2 * HOST_BITS_PER_WIDE_INT
)
1880 else if (prec
> HOST_BITS_PER_WIDE_INT
)
1881 high
&= ~((HOST_WIDE_INT
) (-1) << (prec
- HOST_BITS_PER_WIDE_INT
));
1885 if (prec
< HOST_BITS_PER_WIDE_INT
)
1886 low
&= ~((HOST_WIDE_INT
) (-1) << prec
);
1889 return (high
!= 0 ? HOST_BITS_PER_WIDE_INT
+ exact_log2 (high
)
1890 : exact_log2 (low
));
1893 /* Similar, but return the largest integer Y such that 2 ** Y is less
1894 than or equal to EXPR. */
1897 tree_floor_log2 (const_tree expr
)
1900 HOST_WIDE_INT high
, low
;
1904 if (TREE_CODE (expr
) == COMPLEX_CST
)
1905 return tree_log2 (TREE_REALPART (expr
));
1907 prec
= TYPE_PRECISION (TREE_TYPE (expr
));
1908 high
= TREE_INT_CST_HIGH (expr
);
1909 low
= TREE_INT_CST_LOW (expr
);
1911 /* First clear all bits that are beyond the type's precision in case
1912 we've been sign extended. Ignore if type's precision hasn't been set
1913 since what we are doing is setting it. */
1915 if (prec
== 2 * HOST_BITS_PER_WIDE_INT
|| prec
== 0)
1917 else if (prec
> HOST_BITS_PER_WIDE_INT
)
1918 high
&= ~((HOST_WIDE_INT
) (-1) << (prec
- HOST_BITS_PER_WIDE_INT
));
1922 if (prec
< HOST_BITS_PER_WIDE_INT
)
1923 low
&= ~((HOST_WIDE_INT
) (-1) << prec
);
1926 return (high
!= 0 ? HOST_BITS_PER_WIDE_INT
+ floor_log2 (high
)
1927 : floor_log2 (low
));
1930 /* Return 1 if EXPR is the real constant zero. Trailing zeroes matter for
1931 decimal float constants, so don't return 1 for them. */
1934 real_zerop (const_tree expr
)
1938 return ((TREE_CODE (expr
) == REAL_CST
1939 && REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconst0
)
1940 && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr
)))))
1941 || (TREE_CODE (expr
) == COMPLEX_CST
1942 && real_zerop (TREE_REALPART (expr
))
1943 && real_zerop (TREE_IMAGPART (expr
))));
1946 /* Return 1 if EXPR is the real constant one in real or complex form.
1947 Trailing zeroes matter for decimal float constants, so don't return
1951 real_onep (const_tree expr
)
1955 return ((TREE_CODE (expr
) == REAL_CST
1956 && REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconst1
)
1957 && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr
)))))
1958 || (TREE_CODE (expr
) == COMPLEX_CST
1959 && real_onep (TREE_REALPART (expr
))
1960 && real_zerop (TREE_IMAGPART (expr
))));
1963 /* Return 1 if EXPR is the real constant two. Trailing zeroes matter
1964 for decimal float constants, so don't return 1 for them. */
1967 real_twop (const_tree expr
)
1971 return ((TREE_CODE (expr
) == REAL_CST
1972 && REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconst2
)
1973 && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr
)))))
1974 || (TREE_CODE (expr
) == COMPLEX_CST
1975 && real_twop (TREE_REALPART (expr
))
1976 && real_zerop (TREE_IMAGPART (expr
))));
1979 /* Return 1 if EXPR is the real constant minus one. Trailing zeroes
1980 matter for decimal float constants, so don't return 1 for them. */
1983 real_minus_onep (const_tree expr
)
1987 return ((TREE_CODE (expr
) == REAL_CST
1988 && REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconstm1
)
1989 && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr
)))))
1990 || (TREE_CODE (expr
) == COMPLEX_CST
1991 && real_minus_onep (TREE_REALPART (expr
))
1992 && real_zerop (TREE_IMAGPART (expr
))));
1995 /* Nonzero if EXP is a constant or a cast of a constant. */
1998 really_constant_p (const_tree exp
)
2000 /* This is not quite the same as STRIP_NOPS. It does more. */
2001 while (CONVERT_EXPR_P (exp
)
2002 || TREE_CODE (exp
) == NON_LVALUE_EXPR
)
2003 exp
= TREE_OPERAND (exp
, 0);
2004 return TREE_CONSTANT (exp
);
2007 /* Return first list element whose TREE_VALUE is ELEM.
2008 Return 0 if ELEM is not in LIST. */
2011 value_member (tree elem
, tree list
)
2015 if (elem
== TREE_VALUE (list
))
2017 list
= TREE_CHAIN (list
);
2022 /* Return first list element whose TREE_PURPOSE is ELEM.
2023 Return 0 if ELEM is not in LIST. */
2026 purpose_member (const_tree elem
, tree list
)
2030 if (elem
== TREE_PURPOSE (list
))
2032 list
= TREE_CHAIN (list
);
2037 /* Return true if ELEM is in V. */
2040 vec_member (const_tree elem
, VEC(tree
,gc
) *v
)
2044 FOR_EACH_VEC_ELT (tree
, v
, ix
, t
)
2050 /* Returns element number IDX (zero-origin) of chain CHAIN, or
2054 chain_index (int idx
, tree chain
)
2056 for (; chain
&& idx
> 0; --idx
)
2057 chain
= TREE_CHAIN (chain
);
2061 /* Return nonzero if ELEM is part of the chain CHAIN. */
2064 chain_member (const_tree elem
, const_tree chain
)
2070 chain
= DECL_CHAIN (chain
);
2076 /* Return the length of a chain of nodes chained through TREE_CHAIN.
2077 We expect a null pointer to mark the end of the chain.
2078 This is the Lisp primitive `length'. */
2081 list_length (const_tree t
)
2084 #ifdef ENABLE_TREE_CHECKING
2092 #ifdef ENABLE_TREE_CHECKING
2095 gcc_assert (p
!= q
);
2103 /* Returns the number of FIELD_DECLs in TYPE. */
2106 fields_length (const_tree type
)
2108 tree t
= TYPE_FIELDS (type
);
2111 for (; t
; t
= DECL_CHAIN (t
))
2112 if (TREE_CODE (t
) == FIELD_DECL
)
2118 /* Returns the first FIELD_DECL in the TYPE_FIELDS of the RECORD_TYPE or
2119 UNION_TYPE TYPE, or NULL_TREE if none. */
2122 first_field (const_tree type
)
2124 tree t
= TYPE_FIELDS (type
);
2125 while (t
&& TREE_CODE (t
) != FIELD_DECL
)
2130 /* Concatenate two chains of nodes (chained through TREE_CHAIN)
2131 by modifying the last node in chain 1 to point to chain 2.
2132 This is the Lisp primitive `nconc'. */
2135 chainon (tree op1
, tree op2
)
2144 for (t1
= op1
; TREE_CHAIN (t1
); t1
= TREE_CHAIN (t1
))
2146 TREE_CHAIN (t1
) = op2
;
2148 #ifdef ENABLE_TREE_CHECKING
2151 for (t2
= op2
; t2
; t2
= TREE_CHAIN (t2
))
2152 gcc_assert (t2
!= t1
);
2159 /* Return the last node in a chain of nodes (chained through TREE_CHAIN). */
2162 tree_last (tree chain
)
2166 while ((next
= TREE_CHAIN (chain
)))
2171 /* Reverse the order of elements in the chain T,
2172 and return the new head of the chain (old last element). */
2177 tree prev
= 0, decl
, next
;
2178 for (decl
= t
; decl
; decl
= next
)
2180 /* We shouldn't be using this function to reverse BLOCK chains; we
2181 have blocks_nreverse for that. */
2182 gcc_checking_assert (TREE_CODE (decl
) != BLOCK
);
2183 next
= TREE_CHAIN (decl
);
2184 TREE_CHAIN (decl
) = prev
;
2190 /* Return a newly created TREE_LIST node whose
2191 purpose and value fields are PARM and VALUE. */
2194 build_tree_list_stat (tree parm
, tree value MEM_STAT_DECL
)
2196 tree t
= make_node_stat (TREE_LIST PASS_MEM_STAT
);
2197 TREE_PURPOSE (t
) = parm
;
2198 TREE_VALUE (t
) = value
;
2202 /* Build a chain of TREE_LIST nodes from a vector. */
2205 build_tree_list_vec_stat (const VEC(tree
,gc
) *vec MEM_STAT_DECL
)
2207 tree ret
= NULL_TREE
;
2211 FOR_EACH_VEC_ELT (tree
, vec
, i
, t
)
2213 *pp
= build_tree_list_stat (NULL
, t PASS_MEM_STAT
);
2214 pp
= &TREE_CHAIN (*pp
);
2219 /* Return a newly created TREE_LIST node whose
2220 purpose and value fields are PURPOSE and VALUE
2221 and whose TREE_CHAIN is CHAIN. */
2224 tree_cons_stat (tree purpose
, tree value
, tree chain MEM_STAT_DECL
)
2228 node
= ggc_alloc_zone_tree_node_stat (&tree_zone
, sizeof (struct tree_list
)
2230 memset (node
, 0, sizeof (struct tree_common
));
2232 record_node_allocation_statistics (TREE_LIST
, sizeof (struct tree_list
));
2234 TREE_SET_CODE (node
, TREE_LIST
);
2235 TREE_CHAIN (node
) = chain
;
2236 TREE_PURPOSE (node
) = purpose
;
2237 TREE_VALUE (node
) = value
;
2241 /* Return the values of the elements of a CONSTRUCTOR as a vector of
2245 ctor_to_vec (tree ctor
)
2247 VEC(tree
, gc
) *vec
= VEC_alloc (tree
, gc
, CONSTRUCTOR_NELTS (ctor
));
2251 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (ctor
), ix
, val
)
2252 VEC_quick_push (tree
, vec
, val
);
2257 /* Return the size nominally occupied by an object of type TYPE
2258 when it resides in memory. The value is measured in units of bytes,
2259 and its data type is that normally used for type sizes
2260 (which is the first type created by make_signed_type or
2261 make_unsigned_type). */
2264 size_in_bytes (const_tree type
)
2268 if (type
== error_mark_node
)
2269 return integer_zero_node
;
2271 type
= TYPE_MAIN_VARIANT (type
);
2272 t
= TYPE_SIZE_UNIT (type
);
2276 lang_hooks
.types
.incomplete_type_error (NULL_TREE
, type
);
2277 return size_zero_node
;
2283 /* Return the size of TYPE (in bytes) as a wide integer
2284 or return -1 if the size can vary or is larger than an integer. */
2287 int_size_in_bytes (const_tree type
)
2291 if (type
== error_mark_node
)
2294 type
= TYPE_MAIN_VARIANT (type
);
2295 t
= TYPE_SIZE_UNIT (type
);
2297 || TREE_CODE (t
) != INTEGER_CST
2298 || TREE_INT_CST_HIGH (t
) != 0
2299 /* If the result would appear negative, it's too big to represent. */
2300 || (HOST_WIDE_INT
) TREE_INT_CST_LOW (t
) < 0)
2303 return TREE_INT_CST_LOW (t
);
2306 /* Return the maximum size of TYPE (in bytes) as a wide integer
2307 or return -1 if the size can vary or is larger than an integer. */
2310 max_int_size_in_bytes (const_tree type
)
2312 HOST_WIDE_INT size
= -1;
2315 /* If this is an array type, check for a possible MAX_SIZE attached. */
2317 if (TREE_CODE (type
) == ARRAY_TYPE
)
2319 size_tree
= TYPE_ARRAY_MAX_SIZE (type
);
2321 if (size_tree
&& host_integerp (size_tree
, 1))
2322 size
= tree_low_cst (size_tree
, 1);
2325 /* If we still haven't been able to get a size, see if the language
2326 can compute a maximum size. */
2330 size_tree
= lang_hooks
.types
.max_size (type
);
2332 if (size_tree
&& host_integerp (size_tree
, 1))
2333 size
= tree_low_cst (size_tree
, 1);
2339 /* Returns a tree for the size of EXP in bytes. */
2342 tree_expr_size (const_tree exp
)
2345 && DECL_SIZE_UNIT (exp
) != 0)
2346 return DECL_SIZE_UNIT (exp
);
2348 return size_in_bytes (TREE_TYPE (exp
));
2351 /* Return the bit position of FIELD, in bits from the start of the record.
2352 This is a tree of type bitsizetype. */
2355 bit_position (const_tree field
)
2357 return bit_from_pos (DECL_FIELD_OFFSET (field
),
2358 DECL_FIELD_BIT_OFFSET (field
));
2361 /* Likewise, but return as an integer. It must be representable in
2362 that way (since it could be a signed value, we don't have the
2363 option of returning -1 like int_size_in_byte can. */
2366 int_bit_position (const_tree field
)
2368 return tree_low_cst (bit_position (field
), 0);
2371 /* Return the byte position of FIELD, in bytes from the start of the record.
2372 This is a tree of type sizetype. */
2375 byte_position (const_tree field
)
2377 return byte_from_pos (DECL_FIELD_OFFSET (field
),
2378 DECL_FIELD_BIT_OFFSET (field
));
2381 /* Likewise, but return as an integer. It must be representable in
2382 that way (since it could be a signed value, we don't have the
2383 option of returning -1 like int_size_in_byte can. */
2386 int_byte_position (const_tree field
)
2388 return tree_low_cst (byte_position (field
), 0);
2391 /* Return the strictest alignment, in bits, that T is known to have. */
2394 expr_align (const_tree t
)
2396 unsigned int align0
, align1
;
2398 switch (TREE_CODE (t
))
2400 CASE_CONVERT
: case NON_LVALUE_EXPR
:
2401 /* If we have conversions, we know that the alignment of the
2402 object must meet each of the alignments of the types. */
2403 align0
= expr_align (TREE_OPERAND (t
, 0));
2404 align1
= TYPE_ALIGN (TREE_TYPE (t
));
2405 return MAX (align0
, align1
);
2407 case SAVE_EXPR
: case COMPOUND_EXPR
: case MODIFY_EXPR
:
2408 case INIT_EXPR
: case TARGET_EXPR
: case WITH_CLEANUP_EXPR
:
2409 case CLEANUP_POINT_EXPR
:
2410 /* These don't change the alignment of an object. */
2411 return expr_align (TREE_OPERAND (t
, 0));
2414 /* The best we can do is say that the alignment is the least aligned
2416 align0
= expr_align (TREE_OPERAND (t
, 1));
2417 align1
= expr_align (TREE_OPERAND (t
, 2));
2418 return MIN (align0
, align1
);
2420 /* FIXME: LABEL_DECL and CONST_DECL never have DECL_ALIGN set
2421 meaningfully, it's always 1. */
2422 case LABEL_DECL
: case CONST_DECL
:
2423 case VAR_DECL
: case PARM_DECL
: case RESULT_DECL
:
2425 gcc_assert (DECL_ALIGN (t
) != 0);
2426 return DECL_ALIGN (t
);
2432 /* Otherwise take the alignment from that of the type. */
2433 return TYPE_ALIGN (TREE_TYPE (t
));
2436 /* Return, as a tree node, the number of elements for TYPE (which is an
2437 ARRAY_TYPE) minus one. This counts only elements of the top array. */
2440 array_type_nelts (const_tree type
)
2442 tree index_type
, min
, max
;
2444 /* If they did it with unspecified bounds, then we should have already
2445 given an error about it before we got here. */
2446 if (! TYPE_DOMAIN (type
))
2447 return error_mark_node
;
2449 index_type
= TYPE_DOMAIN (type
);
2450 min
= TYPE_MIN_VALUE (index_type
);
2451 max
= TYPE_MAX_VALUE (index_type
);
2453 /* TYPE_MAX_VALUE may not be set if the array has unknown length. */
2455 return error_mark_node
;
2457 return (integer_zerop (min
)
2459 : fold_build2 (MINUS_EXPR
, TREE_TYPE (max
), max
, min
));
2462 /* If arg is static -- a reference to an object in static storage -- then
2463 return the object. This is not the same as the C meaning of `static'.
2464 If arg isn't static, return NULL. */
2469 switch (TREE_CODE (arg
))
2472 /* Nested functions are static, even though taking their address will
2473 involve a trampoline as we unnest the nested function and create
2474 the trampoline on the tree level. */
2478 return ((TREE_STATIC (arg
) || DECL_EXTERNAL (arg
))
2479 && ! DECL_THREAD_LOCAL_P (arg
)
2480 && ! DECL_DLLIMPORT_P (arg
)
2484 return ((TREE_STATIC (arg
) || DECL_EXTERNAL (arg
))
2488 return TREE_STATIC (arg
) ? arg
: NULL
;
2495 /* If the thing being referenced is not a field, then it is
2496 something language specific. */
2497 gcc_assert (TREE_CODE (TREE_OPERAND (arg
, 1)) == FIELD_DECL
);
2499 /* If we are referencing a bitfield, we can't evaluate an
2500 ADDR_EXPR at compile time and so it isn't a constant. */
2501 if (DECL_BIT_FIELD (TREE_OPERAND (arg
, 1)))
2504 return staticp (TREE_OPERAND (arg
, 0));
2510 return TREE_CONSTANT (TREE_OPERAND (arg
, 0)) ? arg
: NULL
;
2513 case ARRAY_RANGE_REF
:
2514 if (TREE_CODE (TYPE_SIZE (TREE_TYPE (arg
))) == INTEGER_CST
2515 && TREE_CODE (TREE_OPERAND (arg
, 1)) == INTEGER_CST
)
2516 return staticp (TREE_OPERAND (arg
, 0));
2520 case COMPOUND_LITERAL_EXPR
:
2521 return TREE_STATIC (COMPOUND_LITERAL_EXPR_DECL (arg
)) ? arg
: NULL
;
2531 /* Return whether OP is a DECL whose address is function-invariant. */
2534 decl_address_invariant_p (const_tree op
)
2536 /* The conditions below are slightly less strict than the one in
2539 switch (TREE_CODE (op
))
2548 if ((TREE_STATIC (op
) || DECL_EXTERNAL (op
))
2549 || DECL_THREAD_LOCAL_P (op
)
2550 || DECL_CONTEXT (op
) == current_function_decl
2551 || decl_function_context (op
) == current_function_decl
)
2556 if ((TREE_STATIC (op
) || DECL_EXTERNAL (op
))
2557 || decl_function_context (op
) == current_function_decl
)
2568 /* Return whether OP is a DECL whose address is interprocedural-invariant. */
2571 decl_address_ip_invariant_p (const_tree op
)
2573 /* The conditions below are slightly less strict than the one in
2576 switch (TREE_CODE (op
))
2584 if (((TREE_STATIC (op
) || DECL_EXTERNAL (op
))
2585 && !DECL_DLLIMPORT_P (op
))
2586 || DECL_THREAD_LOCAL_P (op
))
2591 if ((TREE_STATIC (op
) || DECL_EXTERNAL (op
)))
2603 /* Return true if T is function-invariant (internal function, does
2604 not handle arithmetic; that's handled in skip_simple_arithmetic and
2605 tree_invariant_p). */
2607 static bool tree_invariant_p (tree t
);
2610 tree_invariant_p_1 (tree t
)
2614 if (TREE_CONSTANT (t
)
2615 || (TREE_READONLY (t
) && !TREE_SIDE_EFFECTS (t
)))
2618 switch (TREE_CODE (t
))
2624 op
= TREE_OPERAND (t
, 0);
2625 while (handled_component_p (op
))
2627 switch (TREE_CODE (op
))
2630 case ARRAY_RANGE_REF
:
2631 if (!tree_invariant_p (TREE_OPERAND (op
, 1))
2632 || TREE_OPERAND (op
, 2) != NULL_TREE
2633 || TREE_OPERAND (op
, 3) != NULL_TREE
)
2638 if (TREE_OPERAND (op
, 2) != NULL_TREE
)
2644 op
= TREE_OPERAND (op
, 0);
2647 return CONSTANT_CLASS_P (op
) || decl_address_invariant_p (op
);
2656 /* Return true if T is function-invariant. */
2659 tree_invariant_p (tree t
)
2661 tree inner
= skip_simple_arithmetic (t
);
2662 return tree_invariant_p_1 (inner
);
2665 /* Wrap a SAVE_EXPR around EXPR, if appropriate.
2666 Do this to any expression which may be used in more than one place,
2667 but must be evaluated only once.
2669 Normally, expand_expr would reevaluate the expression each time.
2670 Calling save_expr produces something that is evaluated and recorded
2671 the first time expand_expr is called on it. Subsequent calls to
2672 expand_expr just reuse the recorded value.
2674 The call to expand_expr that generates code that actually computes
2675 the value is the first call *at compile time*. Subsequent calls
2676 *at compile time* generate code to use the saved value.
2677 This produces correct result provided that *at run time* control
2678 always flows through the insns made by the first expand_expr
2679 before reaching the other places where the save_expr was evaluated.
2680 You, the caller of save_expr, must make sure this is so.
2682 Constants, and certain read-only nodes, are returned with no
2683 SAVE_EXPR because that is safe. Expressions containing placeholders
2684 are not touched; see tree.def for an explanation of what these
2688 save_expr (tree expr
)
2690 tree t
= fold (expr
);
2693 /* If the tree evaluates to a constant, then we don't want to hide that
2694 fact (i.e. this allows further folding, and direct checks for constants).
2695 However, a read-only object that has side effects cannot be bypassed.
2696 Since it is no problem to reevaluate literals, we just return the
2698 inner
= skip_simple_arithmetic (t
);
2699 if (TREE_CODE (inner
) == ERROR_MARK
)
2702 if (tree_invariant_p_1 (inner
))
2705 /* If INNER contains a PLACEHOLDER_EXPR, we must evaluate it each time, since
2706 it means that the size or offset of some field of an object depends on
2707 the value within another field.
2709 Note that it must not be the case that T contains both a PLACEHOLDER_EXPR
2710 and some variable since it would then need to be both evaluated once and
2711 evaluated more than once. Front-ends must assure this case cannot
2712 happen by surrounding any such subexpressions in their own SAVE_EXPR
2713 and forcing evaluation at the proper time. */
2714 if (contains_placeholder_p (inner
))
2717 t
= build1 (SAVE_EXPR
, TREE_TYPE (expr
), t
);
2718 SET_EXPR_LOCATION (t
, EXPR_LOCATION (expr
));
2720 /* This expression might be placed ahead of a jump to ensure that the
2721 value was computed on both sides of the jump. So make sure it isn't
2722 eliminated as dead. */
2723 TREE_SIDE_EFFECTS (t
) = 1;
2727 /* Look inside EXPR and into any simple arithmetic operations. Return
2728 the innermost non-arithmetic node. */
2731 skip_simple_arithmetic (tree expr
)
2735 /* We don't care about whether this can be used as an lvalue in this
2737 while (TREE_CODE (expr
) == NON_LVALUE_EXPR
)
2738 expr
= TREE_OPERAND (expr
, 0);
2740 /* If we have simple operations applied to a SAVE_EXPR or to a SAVE_EXPR and
2741 a constant, it will be more efficient to not make another SAVE_EXPR since
2742 it will allow better simplification and GCSE will be able to merge the
2743 computations if they actually occur. */
2747 if (UNARY_CLASS_P (inner
))
2748 inner
= TREE_OPERAND (inner
, 0);
2749 else if (BINARY_CLASS_P (inner
))
2751 if (tree_invariant_p (TREE_OPERAND (inner
, 1)))
2752 inner
= TREE_OPERAND (inner
, 0);
2753 else if (tree_invariant_p (TREE_OPERAND (inner
, 0)))
2754 inner
= TREE_OPERAND (inner
, 1);
2766 /* Return which tree structure is used by T. */
2768 enum tree_node_structure_enum
2769 tree_node_structure (const_tree t
)
2771 const enum tree_code code
= TREE_CODE (t
);
2772 return tree_node_structure_for_code (code
);
2775 /* Set various status flags when building a CALL_EXPR object T. */
2778 process_call_operands (tree t
)
2780 bool side_effects
= TREE_SIDE_EFFECTS (t
);
2781 bool read_only
= false;
2782 int i
= call_expr_flags (t
);
2784 /* Calls have side-effects, except those to const or pure functions. */
2785 if ((i
& ECF_LOOPING_CONST_OR_PURE
) || !(i
& (ECF_CONST
| ECF_PURE
)))
2786 side_effects
= true;
2787 /* Propagate TREE_READONLY of arguments for const functions. */
2791 if (!side_effects
|| read_only
)
2792 for (i
= 1; i
< TREE_OPERAND_LENGTH (t
); i
++)
2794 tree op
= TREE_OPERAND (t
, i
);
2795 if (op
&& TREE_SIDE_EFFECTS (op
))
2796 side_effects
= true;
2797 if (op
&& !TREE_READONLY (op
) && !CONSTANT_CLASS_P (op
))
2801 TREE_SIDE_EFFECTS (t
) = side_effects
;
2802 TREE_READONLY (t
) = read_only
;
2805 /* Return true if EXP contains a PLACEHOLDER_EXPR, i.e. if it represents a
2806 size or offset that depends on a field within a record. */
2809 contains_placeholder_p (const_tree exp
)
2811 enum tree_code code
;
2816 code
= TREE_CODE (exp
);
2817 if (code
== PLACEHOLDER_EXPR
)
2820 switch (TREE_CODE_CLASS (code
))
2823 /* Don't look at any PLACEHOLDER_EXPRs that might be in index or bit
2824 position computations since they will be converted into a
2825 WITH_RECORD_EXPR involving the reference, which will assume
2826 here will be valid. */
2827 return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0));
2829 case tcc_exceptional
:
2830 if (code
== TREE_LIST
)
2831 return (CONTAINS_PLACEHOLDER_P (TREE_VALUE (exp
))
2832 || CONTAINS_PLACEHOLDER_P (TREE_CHAIN (exp
)));
2837 case tcc_comparison
:
2838 case tcc_expression
:
2842 /* Ignoring the first operand isn't quite right, but works best. */
2843 return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 1));
2846 return (CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0))
2847 || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 1))
2848 || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 2)));
2851 /* The save_expr function never wraps anything containing
2852 a PLACEHOLDER_EXPR. */
2859 switch (TREE_CODE_LENGTH (code
))
2862 return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0));
2864 return (CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0))
2865 || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 1)));
2876 const_call_expr_arg_iterator iter
;
2877 FOR_EACH_CONST_CALL_EXPR_ARG (arg
, iter
, exp
)
2878 if (CONTAINS_PLACEHOLDER_P (arg
))
2892 /* Return true if any part of the structure of TYPE involves a PLACEHOLDER_EXPR
2893 directly. This includes size, bounds, qualifiers (for QUAL_UNION_TYPE) and
2897 type_contains_placeholder_1 (const_tree type
)
2899 /* If the size contains a placeholder or the parent type (component type in
2900 the case of arrays) type involves a placeholder, this type does. */
2901 if (CONTAINS_PLACEHOLDER_P (TYPE_SIZE (type
))
2902 || CONTAINS_PLACEHOLDER_P (TYPE_SIZE_UNIT (type
))
2903 || (!POINTER_TYPE_P (type
)
2905 && type_contains_placeholder_p (TREE_TYPE (type
))))
2908 /* Now do type-specific checks. Note that the last part of the check above
2909 greatly limits what we have to do below. */
2910 switch (TREE_CODE (type
))
2918 case REFERENCE_TYPE
:
2926 case FIXED_POINT_TYPE
:
2927 /* Here we just check the bounds. */
2928 return (CONTAINS_PLACEHOLDER_P (TYPE_MIN_VALUE (type
))
2929 || CONTAINS_PLACEHOLDER_P (TYPE_MAX_VALUE (type
)));
2932 /* We have already checked the component type above, so just check the
2934 return type_contains_placeholder_p (TYPE_DOMAIN (type
));
2938 case QUAL_UNION_TYPE
:
2942 for (field
= TYPE_FIELDS (type
); field
; field
= DECL_CHAIN (field
))
2943 if (TREE_CODE (field
) == FIELD_DECL
2944 && (CONTAINS_PLACEHOLDER_P (DECL_FIELD_OFFSET (field
))
2945 || (TREE_CODE (type
) == QUAL_UNION_TYPE
2946 && CONTAINS_PLACEHOLDER_P (DECL_QUALIFIER (field
)))
2947 || type_contains_placeholder_p (TREE_TYPE (field
))))
2958 /* Wrapper around above function used to cache its result. */
2961 type_contains_placeholder_p (tree type
)
2965 /* If the contains_placeholder_bits field has been initialized,
2966 then we know the answer. */
2967 if (TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) > 0)
2968 return TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) - 1;
2970 /* Indicate that we've seen this type node, and the answer is false.
2971 This is what we want to return if we run into recursion via fields. */
2972 TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) = 1;
2974 /* Compute the real value. */
2975 result
= type_contains_placeholder_1 (type
);
2977 /* Store the real value. */
2978 TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) = result
+ 1;
2983 /* Push tree EXP onto vector QUEUE if it is not already present. */
2986 push_without_duplicates (tree exp
, VEC (tree
, heap
) **queue
)
2991 FOR_EACH_VEC_ELT (tree
, *queue
, i
, iter
)
2992 if (simple_cst_equal (iter
, exp
) == 1)
2996 VEC_safe_push (tree
, heap
, *queue
, exp
);
2999 /* Given a tree EXP, find all occurences of references to fields
3000 in a PLACEHOLDER_EXPR and place them in vector REFS without
3001 duplicates. Also record VAR_DECLs and CONST_DECLs. Note that
3002 we assume here that EXP contains only arithmetic expressions
3003 or CALL_EXPRs with PLACEHOLDER_EXPRs occurring only in their
3007 find_placeholder_in_expr (tree exp
, VEC (tree
, heap
) **refs
)
3009 enum tree_code code
= TREE_CODE (exp
);
3013 /* We handle TREE_LIST and COMPONENT_REF separately. */
3014 if (code
== TREE_LIST
)
3016 FIND_PLACEHOLDER_IN_EXPR (TREE_CHAIN (exp
), refs
);
3017 FIND_PLACEHOLDER_IN_EXPR (TREE_VALUE (exp
), refs
);
3019 else if (code
== COMPONENT_REF
)
3021 for (inner
= TREE_OPERAND (exp
, 0);
3022 REFERENCE_CLASS_P (inner
);
3023 inner
= TREE_OPERAND (inner
, 0))
3026 if (TREE_CODE (inner
) == PLACEHOLDER_EXPR
)
3027 push_without_duplicates (exp
, refs
);
3029 FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), refs
);
3032 switch (TREE_CODE_CLASS (code
))
3037 case tcc_declaration
:
3038 /* Variables allocated to static storage can stay. */
3039 if (!TREE_STATIC (exp
))
3040 push_without_duplicates (exp
, refs
);
3043 case tcc_expression
:
3044 /* This is the pattern built in ada/make_aligning_type. */
3045 if (code
== ADDR_EXPR
3046 && TREE_CODE (TREE_OPERAND (exp
, 0)) == PLACEHOLDER_EXPR
)
3048 push_without_duplicates (exp
, refs
);
3052 /* Fall through... */
3054 case tcc_exceptional
:
3057 case tcc_comparison
:
3059 for (i
= 0; i
< TREE_CODE_LENGTH (code
); i
++)
3060 FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, i
), refs
);
3064 for (i
= 1; i
< TREE_OPERAND_LENGTH (exp
); i
++)
3065 FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, i
), refs
);
3073 /* Given a tree EXP, a FIELD_DECL F, and a replacement value R,
3074 return a tree with all occurrences of references to F in a
3075 PLACEHOLDER_EXPR replaced by R. Also handle VAR_DECLs and
3076 CONST_DECLs. Note that we assume here that EXP contains only
3077 arithmetic expressions or CALL_EXPRs with PLACEHOLDER_EXPRs
3078 occurring only in their argument list. */
3081 substitute_in_expr (tree exp
, tree f
, tree r
)
3083 enum tree_code code
= TREE_CODE (exp
);
3084 tree op0
, op1
, op2
, op3
;
3087 /* We handle TREE_LIST and COMPONENT_REF separately. */
3088 if (code
== TREE_LIST
)
3090 op0
= SUBSTITUTE_IN_EXPR (TREE_CHAIN (exp
), f
, r
);
3091 op1
= SUBSTITUTE_IN_EXPR (TREE_VALUE (exp
), f
, r
);
3092 if (op0
== TREE_CHAIN (exp
) && op1
== TREE_VALUE (exp
))
3095 return tree_cons (TREE_PURPOSE (exp
), op1
, op0
);
3097 else if (code
== COMPONENT_REF
)
3101 /* If this expression is getting a value from a PLACEHOLDER_EXPR
3102 and it is the right field, replace it with R. */
3103 for (inner
= TREE_OPERAND (exp
, 0);
3104 REFERENCE_CLASS_P (inner
);
3105 inner
= TREE_OPERAND (inner
, 0))
3109 op1
= TREE_OPERAND (exp
, 1);
3111 if (TREE_CODE (inner
) == PLACEHOLDER_EXPR
&& op1
== f
)
3114 /* If this expression hasn't been completed let, leave it alone. */
3115 if (TREE_CODE (inner
) == PLACEHOLDER_EXPR
&& !TREE_TYPE (inner
))
3118 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3119 if (op0
== TREE_OPERAND (exp
, 0))
3123 = fold_build3 (COMPONENT_REF
, TREE_TYPE (exp
), op0
, op1
, NULL_TREE
);
3126 switch (TREE_CODE_CLASS (code
))
3131 case tcc_declaration
:
3137 case tcc_expression
:
3141 /* Fall through... */
3143 case tcc_exceptional
:
3146 case tcc_comparison
:
3148 switch (TREE_CODE_LENGTH (code
))
3154 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3155 if (op0
== TREE_OPERAND (exp
, 0))
3158 new_tree
= fold_build1 (code
, TREE_TYPE (exp
), op0
);
3162 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3163 op1
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 1), f
, r
);
3165 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1))
3168 new_tree
= fold_build2 (code
, TREE_TYPE (exp
), op0
, op1
);
3172 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3173 op1
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 1), f
, r
);
3174 op2
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 2), f
, r
);
3176 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3177 && op2
== TREE_OPERAND (exp
, 2))
3180 new_tree
= fold_build3 (code
, TREE_TYPE (exp
), op0
, op1
, op2
);
3184 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3185 op1
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 1), f
, r
);
3186 op2
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 2), f
, r
);
3187 op3
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 3), f
, r
);
3189 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3190 && op2
== TREE_OPERAND (exp
, 2)
3191 && op3
== TREE_OPERAND (exp
, 3))
3195 = fold (build4 (code
, TREE_TYPE (exp
), op0
, op1
, op2
, op3
));
3207 new_tree
= NULL_TREE
;
3209 /* If we are trying to replace F with a constant, inline back
3210 functions which do nothing else than computing a value from
3211 the arguments they are passed. This makes it possible to
3212 fold partially or entirely the replacement expression. */
3213 if (CONSTANT_CLASS_P (r
) && code
== CALL_EXPR
)
3215 tree t
= maybe_inline_call_in_expr (exp
);
3217 return SUBSTITUTE_IN_EXPR (t
, f
, r
);
3220 for (i
= 1; i
< TREE_OPERAND_LENGTH (exp
); i
++)
3222 tree op
= TREE_OPERAND (exp
, i
);
3223 tree new_op
= SUBSTITUTE_IN_EXPR (op
, f
, r
);
3227 new_tree
= copy_node (exp
);
3228 TREE_OPERAND (new_tree
, i
) = new_op
;
3234 new_tree
= fold (new_tree
);
3235 if (TREE_CODE (new_tree
) == CALL_EXPR
)
3236 process_call_operands (new_tree
);
3247 TREE_READONLY (new_tree
) |= TREE_READONLY (exp
);
3249 if (code
== INDIRECT_REF
|| code
== ARRAY_REF
|| code
== ARRAY_RANGE_REF
)
3250 TREE_THIS_NOTRAP (new_tree
) |= TREE_THIS_NOTRAP (exp
);
3255 /* Similar, but look for a PLACEHOLDER_EXPR in EXP and find a replacement
3256 for it within OBJ, a tree that is an object or a chain of references. */
3259 substitute_placeholder_in_expr (tree exp
, tree obj
)
3261 enum tree_code code
= TREE_CODE (exp
);
3262 tree op0
, op1
, op2
, op3
;
3265 /* If this is a PLACEHOLDER_EXPR, see if we find a corresponding type
3266 in the chain of OBJ. */
3267 if (code
== PLACEHOLDER_EXPR
)
3269 tree need_type
= TYPE_MAIN_VARIANT (TREE_TYPE (exp
));
3272 for (elt
= obj
; elt
!= 0;
3273 elt
= ((TREE_CODE (elt
) == COMPOUND_EXPR
3274 || TREE_CODE (elt
) == COND_EXPR
)
3275 ? TREE_OPERAND (elt
, 1)
3276 : (REFERENCE_CLASS_P (elt
)
3277 || UNARY_CLASS_P (elt
)
3278 || BINARY_CLASS_P (elt
)
3279 || VL_EXP_CLASS_P (elt
)
3280 || EXPRESSION_CLASS_P (elt
))
3281 ? TREE_OPERAND (elt
, 0) : 0))
3282 if (TYPE_MAIN_VARIANT (TREE_TYPE (elt
)) == need_type
)
3285 for (elt
= obj
; elt
!= 0;
3286 elt
= ((TREE_CODE (elt
) == COMPOUND_EXPR
3287 || TREE_CODE (elt
) == COND_EXPR
)
3288 ? TREE_OPERAND (elt
, 1)
3289 : (REFERENCE_CLASS_P (elt
)
3290 || UNARY_CLASS_P (elt
)
3291 || BINARY_CLASS_P (elt
)
3292 || VL_EXP_CLASS_P (elt
)
3293 || EXPRESSION_CLASS_P (elt
))
3294 ? TREE_OPERAND (elt
, 0) : 0))
3295 if (POINTER_TYPE_P (TREE_TYPE (elt
))
3296 && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (elt
)))
3298 return fold_build1 (INDIRECT_REF
, need_type
, elt
);
3300 /* If we didn't find it, return the original PLACEHOLDER_EXPR. If it
3301 survives until RTL generation, there will be an error. */
3305 /* TREE_LIST is special because we need to look at TREE_VALUE
3306 and TREE_CHAIN, not TREE_OPERANDS. */
3307 else if (code
== TREE_LIST
)
3309 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_CHAIN (exp
), obj
);
3310 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_VALUE (exp
), obj
);
3311 if (op0
== TREE_CHAIN (exp
) && op1
== TREE_VALUE (exp
))
3314 return tree_cons (TREE_PURPOSE (exp
), op1
, op0
);
3317 switch (TREE_CODE_CLASS (code
))
3320 case tcc_declaration
:
3323 case tcc_exceptional
:
3326 case tcc_comparison
:
3327 case tcc_expression
:
3330 switch (TREE_CODE_LENGTH (code
))
3336 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
3337 if (op0
== TREE_OPERAND (exp
, 0))
3340 new_tree
= fold_build1 (code
, TREE_TYPE (exp
), op0
);
3344 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
3345 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 1), obj
);
3347 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1))
3350 new_tree
= fold_build2 (code
, TREE_TYPE (exp
), op0
, op1
);
3354 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
3355 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 1), obj
);
3356 op2
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 2), obj
);
3358 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3359 && op2
== TREE_OPERAND (exp
, 2))
3362 new_tree
= fold_build3 (code
, TREE_TYPE (exp
), op0
, op1
, op2
);
3366 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
3367 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 1), obj
);
3368 op2
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 2), obj
);
3369 op3
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 3), obj
);
3371 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3372 && op2
== TREE_OPERAND (exp
, 2)
3373 && op3
== TREE_OPERAND (exp
, 3))
3377 = fold (build4 (code
, TREE_TYPE (exp
), op0
, op1
, op2
, op3
));
3389 new_tree
= NULL_TREE
;
3391 for (i
= 1; i
< TREE_OPERAND_LENGTH (exp
); i
++)
3393 tree op
= TREE_OPERAND (exp
, i
);
3394 tree new_op
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (op
, obj
);
3398 new_tree
= copy_node (exp
);
3399 TREE_OPERAND (new_tree
, i
) = new_op
;
3405 new_tree
= fold (new_tree
);
3406 if (TREE_CODE (new_tree
) == CALL_EXPR
)
3407 process_call_operands (new_tree
);
3418 TREE_READONLY (new_tree
) |= TREE_READONLY (exp
);
3420 if (code
== INDIRECT_REF
|| code
== ARRAY_REF
|| code
== ARRAY_RANGE_REF
)
3421 TREE_THIS_NOTRAP (new_tree
) |= TREE_THIS_NOTRAP (exp
);
3426 /* Stabilize a reference so that we can use it any number of times
3427 without causing its operands to be evaluated more than once.
3428 Returns the stabilized reference. This works by means of save_expr,
3429 so see the caveats in the comments about save_expr.
3431 Also allows conversion expressions whose operands are references.
3432 Any other kind of expression is returned unchanged. */
3435 stabilize_reference (tree ref
)
3438 enum tree_code code
= TREE_CODE (ref
);
3445 /* No action is needed in this case. */
3450 case FIX_TRUNC_EXPR
:
3451 result
= build_nt (code
, stabilize_reference (TREE_OPERAND (ref
, 0)));
3455 result
= build_nt (INDIRECT_REF
,
3456 stabilize_reference_1 (TREE_OPERAND (ref
, 0)));
3460 result
= build_nt (COMPONENT_REF
,
3461 stabilize_reference (TREE_OPERAND (ref
, 0)),
3462 TREE_OPERAND (ref
, 1), NULL_TREE
);
3466 result
= build_nt (BIT_FIELD_REF
,
3467 stabilize_reference (TREE_OPERAND (ref
, 0)),
3468 stabilize_reference_1 (TREE_OPERAND (ref
, 1)),
3469 stabilize_reference_1 (TREE_OPERAND (ref
, 2)));
3473 result
= build_nt (ARRAY_REF
,
3474 stabilize_reference (TREE_OPERAND (ref
, 0)),
3475 stabilize_reference_1 (TREE_OPERAND (ref
, 1)),
3476 TREE_OPERAND (ref
, 2), TREE_OPERAND (ref
, 3));
3479 case ARRAY_RANGE_REF
:
3480 result
= build_nt (ARRAY_RANGE_REF
,
3481 stabilize_reference (TREE_OPERAND (ref
, 0)),
3482 stabilize_reference_1 (TREE_OPERAND (ref
, 1)),
3483 TREE_OPERAND (ref
, 2), TREE_OPERAND (ref
, 3));
3487 /* We cannot wrap the first expression in a SAVE_EXPR, as then
3488 it wouldn't be ignored. This matters when dealing with
3490 return stabilize_reference_1 (ref
);
3492 /* If arg isn't a kind of lvalue we recognize, make no change.
3493 Caller should recognize the error for an invalid lvalue. */
3498 return error_mark_node
;
3501 TREE_TYPE (result
) = TREE_TYPE (ref
);
3502 TREE_READONLY (result
) = TREE_READONLY (ref
);
3503 TREE_SIDE_EFFECTS (result
) = TREE_SIDE_EFFECTS (ref
);
3504 TREE_THIS_VOLATILE (result
) = TREE_THIS_VOLATILE (ref
);
3509 /* Subroutine of stabilize_reference; this is called for subtrees of
3510 references. Any expression with side-effects must be put in a SAVE_EXPR
3511 to ensure that it is only evaluated once.
3513 We don't put SAVE_EXPR nodes around everything, because assigning very
3514 simple expressions to temporaries causes us to miss good opportunities
3515 for optimizations. Among other things, the opportunity to fold in the
3516 addition of a constant into an addressing mode often gets lost, e.g.
3517 "y[i+1] += x;". In general, we take the approach that we should not make
3518 an assignment unless we are forced into it - i.e., that any non-side effect
3519 operator should be allowed, and that cse should take care of coalescing
3520 multiple utterances of the same expression should that prove fruitful. */
3523 stabilize_reference_1 (tree e
)
3526 enum tree_code code
= TREE_CODE (e
);
3528 /* We cannot ignore const expressions because it might be a reference
3529 to a const array but whose index contains side-effects. But we can
3530 ignore things that are actual constant or that already have been
3531 handled by this function. */
3533 if (tree_invariant_p (e
))
3536 switch (TREE_CODE_CLASS (code
))
3538 case tcc_exceptional
:
3540 case tcc_declaration
:
3541 case tcc_comparison
:
3543 case tcc_expression
:
3546 /* If the expression has side-effects, then encase it in a SAVE_EXPR
3547 so that it will only be evaluated once. */
3548 /* The reference (r) and comparison (<) classes could be handled as
3549 below, but it is generally faster to only evaluate them once. */
3550 if (TREE_SIDE_EFFECTS (e
))
3551 return save_expr (e
);
3555 /* Constants need no processing. In fact, we should never reach
3560 /* Division is slow and tends to be compiled with jumps,
3561 especially the division by powers of 2 that is often
3562 found inside of an array reference. So do it just once. */
3563 if (code
== TRUNC_DIV_EXPR
|| code
== TRUNC_MOD_EXPR
3564 || code
== FLOOR_DIV_EXPR
|| code
== FLOOR_MOD_EXPR
3565 || code
== CEIL_DIV_EXPR
|| code
== CEIL_MOD_EXPR
3566 || code
== ROUND_DIV_EXPR
|| code
== ROUND_MOD_EXPR
)
3567 return save_expr (e
);
3568 /* Recursively stabilize each operand. */
3569 result
= build_nt (code
, stabilize_reference_1 (TREE_OPERAND (e
, 0)),
3570 stabilize_reference_1 (TREE_OPERAND (e
, 1)));
3574 /* Recursively stabilize each operand. */
3575 result
= build_nt (code
, stabilize_reference_1 (TREE_OPERAND (e
, 0)));
3582 TREE_TYPE (result
) = TREE_TYPE (e
);
3583 TREE_READONLY (result
) = TREE_READONLY (e
);
3584 TREE_SIDE_EFFECTS (result
) = TREE_SIDE_EFFECTS (e
);
3585 TREE_THIS_VOLATILE (result
) = TREE_THIS_VOLATILE (e
);
3590 /* Low-level constructors for expressions. */
3592 /* A helper function for build1 and constant folders. Set TREE_CONSTANT,
3593 and TREE_SIDE_EFFECTS for an ADDR_EXPR. */
3596 recompute_tree_invariant_for_addr_expr (tree t
)
3599 bool tc
= true, se
= false;
3601 /* We started out assuming this address is both invariant and constant, but
3602 does not have side effects. Now go down any handled components and see if
3603 any of them involve offsets that are either non-constant or non-invariant.
3604 Also check for side-effects.
3606 ??? Note that this code makes no attempt to deal with the case where
3607 taking the address of something causes a copy due to misalignment. */
3609 #define UPDATE_FLAGS(NODE) \
3610 do { tree _node = (NODE); \
3611 if (_node && !TREE_CONSTANT (_node)) tc = false; \
3612 if (_node && TREE_SIDE_EFFECTS (_node)) se = true; } while (0)
3614 for (node
= TREE_OPERAND (t
, 0); handled_component_p (node
);
3615 node
= TREE_OPERAND (node
, 0))
3617 /* If the first operand doesn't have an ARRAY_TYPE, this is a bogus
3618 array reference (probably made temporarily by the G++ front end),
3619 so ignore all the operands. */
3620 if ((TREE_CODE (node
) == ARRAY_REF
3621 || TREE_CODE (node
) == ARRAY_RANGE_REF
)
3622 && TREE_CODE (TREE_TYPE (TREE_OPERAND (node
, 0))) == ARRAY_TYPE
)
3624 UPDATE_FLAGS (TREE_OPERAND (node
, 1));
3625 if (TREE_OPERAND (node
, 2))
3626 UPDATE_FLAGS (TREE_OPERAND (node
, 2));
3627 if (TREE_OPERAND (node
, 3))
3628 UPDATE_FLAGS (TREE_OPERAND (node
, 3));
3630 /* Likewise, just because this is a COMPONENT_REF doesn't mean we have a
3631 FIELD_DECL, apparently. The G++ front end can put something else
3632 there, at least temporarily. */
3633 else if (TREE_CODE (node
) == COMPONENT_REF
3634 && TREE_CODE (TREE_OPERAND (node
, 1)) == FIELD_DECL
)
3636 if (TREE_OPERAND (node
, 2))
3637 UPDATE_FLAGS (TREE_OPERAND (node
, 2));
3639 else if (TREE_CODE (node
) == BIT_FIELD_REF
)
3640 UPDATE_FLAGS (TREE_OPERAND (node
, 2));
3643 node
= lang_hooks
.expr_to_decl (node
, &tc
, &se
);
3645 /* Now see what's inside. If it's an INDIRECT_REF, copy our properties from
3646 the address, since &(*a)->b is a form of addition. If it's a constant, the
3647 address is constant too. If it's a decl, its address is constant if the
3648 decl is static. Everything else is not constant and, furthermore,
3649 taking the address of a volatile variable is not volatile. */
3650 if (TREE_CODE (node
) == INDIRECT_REF
3651 || TREE_CODE (node
) == MEM_REF
)
3652 UPDATE_FLAGS (TREE_OPERAND (node
, 0));
3653 else if (CONSTANT_CLASS_P (node
))
3655 else if (DECL_P (node
))
3656 tc
&= (staticp (node
) != NULL_TREE
);
3660 se
|= TREE_SIDE_EFFECTS (node
);
3664 TREE_CONSTANT (t
) = tc
;
3665 TREE_SIDE_EFFECTS (t
) = se
;
3669 /* Build an expression of code CODE, data type TYPE, and operands as
3670 specified. Expressions and reference nodes can be created this way.
3671 Constants, decls, types and misc nodes cannot be.
3673 We define 5 non-variadic functions, from 0 to 4 arguments. This is
3674 enough for all extant tree codes. */
3677 build0_stat (enum tree_code code
, tree tt MEM_STAT_DECL
)
3681 gcc_assert (TREE_CODE_LENGTH (code
) == 0);
3683 t
= make_node_stat (code PASS_MEM_STAT
);
3690 build1_stat (enum tree_code code
, tree type
, tree node MEM_STAT_DECL
)
3692 int length
= sizeof (struct tree_exp
);
3695 record_node_allocation_statistics (code
, length
);
3697 gcc_assert (TREE_CODE_LENGTH (code
) == 1);
3699 t
= ggc_alloc_zone_tree_node_stat (&tree_zone
, length PASS_MEM_STAT
);
3701 memset (t
, 0, sizeof (struct tree_common
));
3703 TREE_SET_CODE (t
, code
);
3705 TREE_TYPE (t
) = type
;
3706 SET_EXPR_LOCATION (t
, UNKNOWN_LOCATION
);
3707 TREE_OPERAND (t
, 0) = node
;
3708 TREE_BLOCK (t
) = NULL_TREE
;
3709 if (node
&& !TYPE_P (node
))
3711 TREE_SIDE_EFFECTS (t
) = TREE_SIDE_EFFECTS (node
);
3712 TREE_READONLY (t
) = TREE_READONLY (node
);
3715 if (TREE_CODE_CLASS (code
) == tcc_statement
)
3716 TREE_SIDE_EFFECTS (t
) = 1;
3720 /* All of these have side-effects, no matter what their
3722 TREE_SIDE_EFFECTS (t
) = 1;
3723 TREE_READONLY (t
) = 0;
3727 /* Whether a dereference is readonly has nothing to do with whether
3728 its operand is readonly. */
3729 TREE_READONLY (t
) = 0;
3734 recompute_tree_invariant_for_addr_expr (t
);
3738 if ((TREE_CODE_CLASS (code
) == tcc_unary
|| code
== VIEW_CONVERT_EXPR
)
3739 && node
&& !TYPE_P (node
)
3740 && TREE_CONSTANT (node
))
3741 TREE_CONSTANT (t
) = 1;
3742 if (TREE_CODE_CLASS (code
) == tcc_reference
3743 && node
&& TREE_THIS_VOLATILE (node
))
3744 TREE_THIS_VOLATILE (t
) = 1;
3751 #define PROCESS_ARG(N) \
3753 TREE_OPERAND (t, N) = arg##N; \
3754 if (arg##N &&!TYPE_P (arg##N)) \
3756 if (TREE_SIDE_EFFECTS (arg##N)) \
3758 if (!TREE_READONLY (arg##N) \
3759 && !CONSTANT_CLASS_P (arg##N)) \
3760 (void) (read_only = 0); \
3761 if (!TREE_CONSTANT (arg##N)) \
3762 (void) (constant = 0); \
3767 build2_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1 MEM_STAT_DECL
)
3769 bool constant
, read_only
, side_effects
;
3772 gcc_assert (TREE_CODE_LENGTH (code
) == 2);
3774 if ((code
== MINUS_EXPR
|| code
== PLUS_EXPR
|| code
== MULT_EXPR
)
3775 && arg0
&& arg1
&& tt
&& POINTER_TYPE_P (tt
)
3776 /* When sizetype precision doesn't match that of pointers
3777 we need to be able to build explicit extensions or truncations
3778 of the offset argument. */
3779 && TYPE_PRECISION (sizetype
) == TYPE_PRECISION (tt
))
3780 gcc_assert (TREE_CODE (arg0
) == INTEGER_CST
3781 && TREE_CODE (arg1
) == INTEGER_CST
);
3783 if (code
== POINTER_PLUS_EXPR
&& arg0
&& arg1
&& tt
)
3784 gcc_assert (POINTER_TYPE_P (tt
) && POINTER_TYPE_P (TREE_TYPE (arg0
))
3785 && INTEGRAL_TYPE_P (TREE_TYPE (arg1
))
3786 && useless_type_conversion_p (sizetype
, TREE_TYPE (arg1
)));
3788 t
= make_node_stat (code PASS_MEM_STAT
);
3791 /* Below, we automatically set TREE_SIDE_EFFECTS and TREE_READONLY for the
3792 result based on those same flags for the arguments. But if the
3793 arguments aren't really even `tree' expressions, we shouldn't be trying
3796 /* Expressions without side effects may be constant if their
3797 arguments are as well. */
3798 constant
= (TREE_CODE_CLASS (code
) == tcc_comparison
3799 || TREE_CODE_CLASS (code
) == tcc_binary
);
3801 side_effects
= TREE_SIDE_EFFECTS (t
);
3806 TREE_READONLY (t
) = read_only
;
3807 TREE_CONSTANT (t
) = constant
;
3808 TREE_SIDE_EFFECTS (t
) = side_effects
;
3809 TREE_THIS_VOLATILE (t
)
3810 = (TREE_CODE_CLASS (code
) == tcc_reference
3811 && arg0
&& TREE_THIS_VOLATILE (arg0
));
3818 build3_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
3819 tree arg2 MEM_STAT_DECL
)
3821 bool constant
, read_only
, side_effects
;
3824 gcc_assert (TREE_CODE_LENGTH (code
) == 3);
3825 gcc_assert (TREE_CODE_CLASS (code
) != tcc_vl_exp
);
3827 t
= make_node_stat (code PASS_MEM_STAT
);
3832 /* As a special exception, if COND_EXPR has NULL branches, we
3833 assume that it is a gimple statement and always consider
3834 it to have side effects. */
3835 if (code
== COND_EXPR
3836 && tt
== void_type_node
3837 && arg1
== NULL_TREE
3838 && arg2
== NULL_TREE
)
3839 side_effects
= true;
3841 side_effects
= TREE_SIDE_EFFECTS (t
);
3847 if (code
== COND_EXPR
)
3848 TREE_READONLY (t
) = read_only
;
3850 TREE_SIDE_EFFECTS (t
) = side_effects
;
3851 TREE_THIS_VOLATILE (t
)
3852 = (TREE_CODE_CLASS (code
) == tcc_reference
3853 && arg0
&& TREE_THIS_VOLATILE (arg0
));
3859 build4_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
3860 tree arg2
, tree arg3 MEM_STAT_DECL
)
3862 bool constant
, read_only
, side_effects
;
3865 gcc_assert (TREE_CODE_LENGTH (code
) == 4);
3867 t
= make_node_stat (code PASS_MEM_STAT
);
3870 side_effects
= TREE_SIDE_EFFECTS (t
);
3877 TREE_SIDE_EFFECTS (t
) = side_effects
;
3878 TREE_THIS_VOLATILE (t
)
3879 = (TREE_CODE_CLASS (code
) == tcc_reference
3880 && arg0
&& TREE_THIS_VOLATILE (arg0
));
3886 build5_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
3887 tree arg2
, tree arg3
, tree arg4 MEM_STAT_DECL
)
3889 bool constant
, read_only
, side_effects
;
3892 gcc_assert (TREE_CODE_LENGTH (code
) == 5);
3894 t
= make_node_stat (code PASS_MEM_STAT
);
3897 side_effects
= TREE_SIDE_EFFECTS (t
);
3905 TREE_SIDE_EFFECTS (t
) = side_effects
;
3906 TREE_THIS_VOLATILE (t
)
3907 = (TREE_CODE_CLASS (code
) == tcc_reference
3908 && arg0
&& TREE_THIS_VOLATILE (arg0
));
3914 build6_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
3915 tree arg2
, tree arg3
, tree arg4
, tree arg5 MEM_STAT_DECL
)
3917 bool constant
, read_only
, side_effects
;
3920 gcc_assert (code
== TARGET_MEM_REF
);
3922 t
= make_node_stat (code PASS_MEM_STAT
);
3925 side_effects
= TREE_SIDE_EFFECTS (t
);
3932 if (code
== TARGET_MEM_REF
)
3936 TREE_SIDE_EFFECTS (t
) = side_effects
;
3937 TREE_THIS_VOLATILE (t
)
3938 = (code
== TARGET_MEM_REF
3939 && arg5
&& TREE_THIS_VOLATILE (arg5
));
3944 /* Build a simple MEM_REF tree with the sematics of a plain INDIRECT_REF
3945 on the pointer PTR. */
3948 build_simple_mem_ref_loc (location_t loc
, tree ptr
)
3950 HOST_WIDE_INT offset
= 0;
3951 tree ptype
= TREE_TYPE (ptr
);
3953 /* For convenience allow addresses that collapse to a simple base
3955 if (TREE_CODE (ptr
) == ADDR_EXPR
3956 && (handled_component_p (TREE_OPERAND (ptr
, 0))
3957 || TREE_CODE (TREE_OPERAND (ptr
, 0)) == MEM_REF
))
3959 ptr
= get_addr_base_and_unit_offset (TREE_OPERAND (ptr
, 0), &offset
);
3961 ptr
= build_fold_addr_expr (ptr
);
3962 gcc_assert (is_gimple_reg (ptr
) || is_gimple_min_invariant (ptr
));
3964 tem
= build2 (MEM_REF
, TREE_TYPE (ptype
),
3965 ptr
, build_int_cst (ptype
, offset
));
3966 SET_EXPR_LOCATION (tem
, loc
);
3970 /* Return the constant offset of a MEM_REF or TARGET_MEM_REF tree T. */
3973 mem_ref_offset (const_tree t
)
3975 tree toff
= TREE_OPERAND (t
, 1);
3976 return double_int_sext (tree_to_double_int (toff
),
3977 TYPE_PRECISION (TREE_TYPE (toff
)));
3980 /* Return the pointer-type relevant for TBAA purposes from the
3981 gimple memory reference tree T. This is the type to be used for
3982 the offset operand of MEM_REF or TARGET_MEM_REF replacements of T. */
3985 reference_alias_ptr_type (const_tree t
)
3987 const_tree base
= t
;
3988 while (handled_component_p (base
))
3989 base
= TREE_OPERAND (base
, 0);
3990 if (TREE_CODE (base
) == MEM_REF
)
3991 return TREE_TYPE (TREE_OPERAND (base
, 1));
3992 else if (TREE_CODE (base
) == TARGET_MEM_REF
)
3993 return TREE_TYPE (TMR_OFFSET (base
));
3995 return build_pointer_type (TYPE_MAIN_VARIANT (TREE_TYPE (base
)));
3998 /* Return an invariant ADDR_EXPR of type TYPE taking the address of BASE
3999 offsetted by OFFSET units. */
4002 build_invariant_address (tree type
, tree base
, HOST_WIDE_INT offset
)
4004 tree ref
= fold_build2 (MEM_REF
, TREE_TYPE (type
),
4005 build_fold_addr_expr (base
),
4006 build_int_cst (ptr_type_node
, offset
));
4007 tree addr
= build1 (ADDR_EXPR
, type
, ref
);
4008 recompute_tree_invariant_for_addr_expr (addr
);
4012 /* Similar except don't specify the TREE_TYPE
4013 and leave the TREE_SIDE_EFFECTS as 0.
4014 It is permissible for arguments to be null,
4015 or even garbage if their values do not matter. */
4018 build_nt (enum tree_code code
, ...)
4025 gcc_assert (TREE_CODE_CLASS (code
) != tcc_vl_exp
);
4029 t
= make_node (code
);
4030 length
= TREE_CODE_LENGTH (code
);
4032 for (i
= 0; i
< length
; i
++)
4033 TREE_OPERAND (t
, i
) = va_arg (p
, tree
);
4039 /* Similar to build_nt, but for creating a CALL_EXPR object with a
4043 build_nt_call_vec (tree fn
, VEC(tree
,gc
) *args
)
4048 ret
= build_vl_exp (CALL_EXPR
, VEC_length (tree
, args
) + 3);
4049 CALL_EXPR_FN (ret
) = fn
;
4050 CALL_EXPR_STATIC_CHAIN (ret
) = NULL_TREE
;
4051 FOR_EACH_VEC_ELT (tree
, args
, ix
, t
)
4052 CALL_EXPR_ARG (ret
, ix
) = t
;
4056 /* Create a DECL_... node of code CODE, name NAME and data type TYPE.
4057 We do NOT enter this node in any sort of symbol table.
4059 LOC is the location of the decl.
4061 layout_decl is used to set up the decl's storage layout.
4062 Other slots are initialized to 0 or null pointers. */
4065 build_decl_stat (location_t loc
, enum tree_code code
, tree name
,
4066 tree type MEM_STAT_DECL
)
4070 t
= make_node_stat (code PASS_MEM_STAT
);
4071 DECL_SOURCE_LOCATION (t
) = loc
;
4073 /* if (type == error_mark_node)
4074 type = integer_type_node; */
4075 /* That is not done, deliberately, so that having error_mark_node
4076 as the type can suppress useless errors in the use of this variable. */
4078 DECL_NAME (t
) = name
;
4079 TREE_TYPE (t
) = type
;
4081 if (code
== VAR_DECL
|| code
== PARM_DECL
|| code
== RESULT_DECL
)
4087 /* Builds and returns function declaration with NAME and TYPE. */
4090 build_fn_decl (const char *name
, tree type
)
4092 tree id
= get_identifier (name
);
4093 tree decl
= build_decl (input_location
, FUNCTION_DECL
, id
, type
);
4095 DECL_EXTERNAL (decl
) = 1;
4096 TREE_PUBLIC (decl
) = 1;
4097 DECL_ARTIFICIAL (decl
) = 1;
4098 TREE_NOTHROW (decl
) = 1;
4103 VEC(tree
,gc
) *all_translation_units
;
4105 /* Builds a new translation-unit decl with name NAME, queues it in the
4106 global list of translation-unit decls and returns it. */
4109 build_translation_unit_decl (tree name
)
4111 tree tu
= build_decl (UNKNOWN_LOCATION
, TRANSLATION_UNIT_DECL
,
4113 TRANSLATION_UNIT_LANGUAGE (tu
) = lang_hooks
.name
;
4114 VEC_safe_push (tree
, gc
, all_translation_units
, tu
);
4119 /* BLOCK nodes are used to represent the structure of binding contours
4120 and declarations, once those contours have been exited and their contents
4121 compiled. This information is used for outputting debugging info. */
4124 build_block (tree vars
, tree subblocks
, tree supercontext
, tree chain
)
4126 tree block
= make_node (BLOCK
);
4128 BLOCK_VARS (block
) = vars
;
4129 BLOCK_SUBBLOCKS (block
) = subblocks
;
4130 BLOCK_SUPERCONTEXT (block
) = supercontext
;
4131 BLOCK_CHAIN (block
) = chain
;
4136 /* Like SET_EXPR_LOCATION, but make sure the tree can have a location.
4138 LOC is the location to use in tree T. */
4141 protected_set_expr_location (tree t
, location_t loc
)
4143 if (t
&& CAN_HAVE_LOCATION_P (t
))
4144 SET_EXPR_LOCATION (t
, loc
);
4147 /* Return a declaration like DDECL except that its DECL_ATTRIBUTES
4151 build_decl_attribute_variant (tree ddecl
, tree attribute
)
4153 DECL_ATTRIBUTES (ddecl
) = attribute
;
4157 /* Borrowed from hashtab.c iterative_hash implementation. */
4158 #define mix(a,b,c) \
4160 a -= b; a -= c; a ^= (c>>13); \
4161 b -= c; b -= a; b ^= (a<< 8); \
4162 c -= a; c -= b; c ^= ((b&0xffffffff)>>13); \
4163 a -= b; a -= c; a ^= ((c&0xffffffff)>>12); \
4164 b -= c; b -= a; b = (b ^ (a<<16)) & 0xffffffff; \
4165 c -= a; c -= b; c = (c ^ (b>> 5)) & 0xffffffff; \
4166 a -= b; a -= c; a = (a ^ (c>> 3)) & 0xffffffff; \
4167 b -= c; b -= a; b = (b ^ (a<<10)) & 0xffffffff; \
4168 c -= a; c -= b; c = (c ^ (b>>15)) & 0xffffffff; \
4172 /* Produce good hash value combining VAL and VAL2. */
4174 iterative_hash_hashval_t (hashval_t val
, hashval_t val2
)
4176 /* the golden ratio; an arbitrary value. */
4177 hashval_t a
= 0x9e3779b9;
4183 /* Produce good hash value combining VAL and VAL2. */
4185 iterative_hash_host_wide_int (HOST_WIDE_INT val
, hashval_t val2
)
4187 if (sizeof (HOST_WIDE_INT
) == sizeof (hashval_t
))
4188 return iterative_hash_hashval_t (val
, val2
);
4191 hashval_t a
= (hashval_t
) val
;
4192 /* Avoid warnings about shifting of more than the width of the type on
4193 hosts that won't execute this path. */
4195 hashval_t b
= (hashval_t
) (val
>> (sizeof (hashval_t
) * 8 + zero
));
4197 if (sizeof (HOST_WIDE_INT
) > 2 * sizeof (hashval_t
))
4199 hashval_t a
= (hashval_t
) (val
>> (sizeof (hashval_t
) * 16 + zero
));
4200 hashval_t b
= (hashval_t
) (val
>> (sizeof (hashval_t
) * 24 + zero
));
4207 /* Return a type like TTYPE except that its TYPE_ATTRIBUTE
4208 is ATTRIBUTE and its qualifiers are QUALS.
4210 Record such modified types already made so we don't make duplicates. */
4213 build_type_attribute_qual_variant (tree ttype
, tree attribute
, int quals
)
4215 if (! attribute_list_equal (TYPE_ATTRIBUTES (ttype
), attribute
))
4217 hashval_t hashcode
= 0;
4219 enum tree_code code
= TREE_CODE (ttype
);
4221 /* Building a distinct copy of a tagged type is inappropriate; it
4222 causes breakage in code that expects there to be a one-to-one
4223 relationship between a struct and its fields.
4224 build_duplicate_type is another solution (as used in
4225 handle_transparent_union_attribute), but that doesn't play well
4226 with the stronger C++ type identity model. */
4227 if (TREE_CODE (ttype
) == RECORD_TYPE
4228 || TREE_CODE (ttype
) == UNION_TYPE
4229 || TREE_CODE (ttype
) == QUAL_UNION_TYPE
4230 || TREE_CODE (ttype
) == ENUMERAL_TYPE
)
4232 warning (OPT_Wattributes
,
4233 "ignoring attributes applied to %qT after definition",
4234 TYPE_MAIN_VARIANT (ttype
));
4235 return build_qualified_type (ttype
, quals
);
4238 ttype
= build_qualified_type (ttype
, TYPE_UNQUALIFIED
);
4239 ntype
= build_distinct_type_copy (ttype
);
4241 TYPE_ATTRIBUTES (ntype
) = attribute
;
4243 hashcode
= iterative_hash_object (code
, hashcode
);
4244 if (TREE_TYPE (ntype
))
4245 hashcode
= iterative_hash_object (TYPE_HASH (TREE_TYPE (ntype
)),
4247 hashcode
= attribute_hash_list (attribute
, hashcode
);
4249 switch (TREE_CODE (ntype
))
4252 hashcode
= type_hash_list (TYPE_ARG_TYPES (ntype
), hashcode
);
4255 if (TYPE_DOMAIN (ntype
))
4256 hashcode
= iterative_hash_object (TYPE_HASH (TYPE_DOMAIN (ntype
)),
4260 hashcode
= iterative_hash_object
4261 (TREE_INT_CST_LOW (TYPE_MAX_VALUE (ntype
)), hashcode
);
4262 hashcode
= iterative_hash_object
4263 (TREE_INT_CST_HIGH (TYPE_MAX_VALUE (ntype
)), hashcode
);
4266 case FIXED_POINT_TYPE
:
4268 unsigned int precision
= TYPE_PRECISION (ntype
);
4269 hashcode
= iterative_hash_object (precision
, hashcode
);
4276 ntype
= type_hash_canon (hashcode
, ntype
);
4278 /* If the target-dependent attributes make NTYPE different from
4279 its canonical type, we will need to use structural equality
4280 checks for this type. */
4281 if (TYPE_STRUCTURAL_EQUALITY_P (ttype
)
4282 || !comp_type_attributes (ntype
, ttype
))
4283 SET_TYPE_STRUCTURAL_EQUALITY (ntype
);
4284 else if (TYPE_CANONICAL (ntype
) == ntype
)
4285 TYPE_CANONICAL (ntype
) = TYPE_CANONICAL (ttype
);
4287 ttype
= build_qualified_type (ntype
, quals
);
4289 else if (TYPE_QUALS (ttype
) != quals
)
4290 ttype
= build_qualified_type (ttype
, quals
);
4295 /* Compare two attributes for their value identity. Return true if the
4296 attribute values are known to be equal; otherwise return false.
4300 attribute_value_equal (const_tree attr1
, const_tree attr2
)
4302 if (TREE_VALUE (attr1
) == TREE_VALUE (attr2
))
4305 if (TREE_VALUE (attr1
) != NULL_TREE
4306 && TREE_CODE (TREE_VALUE (attr1
)) == TREE_LIST
4307 && TREE_VALUE (attr2
) != NULL
4308 && TREE_CODE (TREE_VALUE (attr2
)) == TREE_LIST
)
4309 return (simple_cst_list_equal (TREE_VALUE (attr1
),
4310 TREE_VALUE (attr2
)) == 1);
4312 return (simple_cst_equal (TREE_VALUE (attr1
), TREE_VALUE (attr2
)) == 1);
4315 /* Return 0 if the attributes for two types are incompatible, 1 if they
4316 are compatible, and 2 if they are nearly compatible (which causes a
4317 warning to be generated). */
4319 comp_type_attributes (const_tree type1
, const_tree type2
)
4321 const_tree a1
= TYPE_ATTRIBUTES (type1
);
4322 const_tree a2
= TYPE_ATTRIBUTES (type2
);
4327 for (a
= a1
; a
!= NULL_TREE
; a
= TREE_CHAIN (a
))
4329 const struct attribute_spec
*as
;
4332 as
= lookup_attribute_spec (TREE_PURPOSE (a
));
4333 if (!as
|| as
->affects_type_identity
== false)
4336 attr
= lookup_attribute (as
->name
, CONST_CAST_TREE (a2
));
4337 if (!attr
|| !attribute_value_equal (a
, attr
))
4342 for (a
= a2
; a
!= NULL_TREE
; a
= TREE_CHAIN (a
))
4344 const struct attribute_spec
*as
;
4346 as
= lookup_attribute_spec (TREE_PURPOSE (a
));
4347 if (!as
|| as
->affects_type_identity
== false)
4350 if (!lookup_attribute (as
->name
, CONST_CAST_TREE (a1
)))
4352 /* We don't need to compare trees again, as we did this
4353 already in first loop. */
4355 /* All types - affecting identity - are equal, so
4356 there is no need to call target hook for comparison. */
4360 /* As some type combinations - like default calling-convention - might
4361 be compatible, we have to call the target hook to get the final result. */
4362 return targetm
.comp_type_attributes (type1
, type2
);
4365 /* Return a type like TTYPE except that its TYPE_ATTRIBUTE
4368 Record such modified types already made so we don't make duplicates. */
4371 build_type_attribute_variant (tree ttype
, tree attribute
)
4373 return build_type_attribute_qual_variant (ttype
, attribute
,
4374 TYPE_QUALS (ttype
));
4378 /* Reset the expression *EXPR_P, a size or position.
4380 ??? We could reset all non-constant sizes or positions. But it's cheap
4381 enough to not do so and refrain from adding workarounds to dwarf2out.c.
4383 We need to reset self-referential sizes or positions because they cannot
4384 be gimplified and thus can contain a CALL_EXPR after the gimplification
4385 is finished, which will run afoul of LTO streaming. And they need to be
4386 reset to something essentially dummy but not constant, so as to preserve
4387 the properties of the object they are attached to. */
4390 free_lang_data_in_one_sizepos (tree
*expr_p
)
4392 tree expr
= *expr_p
;
4393 if (CONTAINS_PLACEHOLDER_P (expr
))
4394 *expr_p
= build0 (PLACEHOLDER_EXPR
, TREE_TYPE (expr
));
4398 /* Reset all the fields in a binfo node BINFO. We only keep
4399 BINFO_VIRTUALS, which is used by gimple_fold_obj_type_ref. */
4402 free_lang_data_in_binfo (tree binfo
)
4407 gcc_assert (TREE_CODE (binfo
) == TREE_BINFO
);
4409 BINFO_VTABLE (binfo
) = NULL_TREE
;
4410 BINFO_BASE_ACCESSES (binfo
) = NULL
;
4411 BINFO_INHERITANCE_CHAIN (binfo
) = NULL_TREE
;
4412 BINFO_SUBVTT_INDEX (binfo
) = NULL_TREE
;
4414 FOR_EACH_VEC_ELT (tree
, BINFO_BASE_BINFOS (binfo
), i
, t
)
4415 free_lang_data_in_binfo (t
);
4419 /* Reset all language specific information still present in TYPE. */
4422 free_lang_data_in_type (tree type
)
4424 gcc_assert (TYPE_P (type
));
4426 /* Give the FE a chance to remove its own data first. */
4427 lang_hooks
.free_lang_data (type
);
4429 TREE_LANG_FLAG_0 (type
) = 0;
4430 TREE_LANG_FLAG_1 (type
) = 0;
4431 TREE_LANG_FLAG_2 (type
) = 0;
4432 TREE_LANG_FLAG_3 (type
) = 0;
4433 TREE_LANG_FLAG_4 (type
) = 0;
4434 TREE_LANG_FLAG_5 (type
) = 0;
4435 TREE_LANG_FLAG_6 (type
) = 0;
4437 if (TREE_CODE (type
) == FUNCTION_TYPE
)
4439 /* Remove the const and volatile qualifiers from arguments. The
4440 C++ front end removes them, but the C front end does not,
4441 leading to false ODR violation errors when merging two
4442 instances of the same function signature compiled by
4443 different front ends. */
4446 for (p
= TYPE_ARG_TYPES (type
); p
; p
= TREE_CHAIN (p
))
4448 tree arg_type
= TREE_VALUE (p
);
4450 if (TYPE_READONLY (arg_type
) || TYPE_VOLATILE (arg_type
))
4452 int quals
= TYPE_QUALS (arg_type
)
4454 & ~TYPE_QUAL_VOLATILE
;
4455 TREE_VALUE (p
) = build_qualified_type (arg_type
, quals
);
4456 free_lang_data_in_type (TREE_VALUE (p
));
4461 /* Remove members that are not actually FIELD_DECLs from the field
4462 list of an aggregate. These occur in C++. */
4463 if (RECORD_OR_UNION_TYPE_P (type
))
4467 /* Note that TYPE_FIELDS can be shared across distinct
4468 TREE_TYPEs. Therefore, if the first field of TYPE_FIELDS is
4469 to be removed, we cannot set its TREE_CHAIN to NULL.
4470 Otherwise, we would not be able to find all the other fields
4471 in the other instances of this TREE_TYPE.
4473 This was causing an ICE in testsuite/g++.dg/lto/20080915.C. */
4475 member
= TYPE_FIELDS (type
);
4478 if (TREE_CODE (member
) == FIELD_DECL
)
4481 TREE_CHAIN (prev
) = member
;
4483 TYPE_FIELDS (type
) = member
;
4487 member
= TREE_CHAIN (member
);
4491 TREE_CHAIN (prev
) = NULL_TREE
;
4493 TYPE_FIELDS (type
) = NULL_TREE
;
4495 TYPE_METHODS (type
) = NULL_TREE
;
4496 if (TYPE_BINFO (type
))
4497 free_lang_data_in_binfo (TYPE_BINFO (type
));
4501 /* For non-aggregate types, clear out the language slot (which
4502 overloads TYPE_BINFO). */
4503 TYPE_LANG_SLOT_1 (type
) = NULL_TREE
;
4505 if (INTEGRAL_TYPE_P (type
)
4506 || SCALAR_FLOAT_TYPE_P (type
)
4507 || FIXED_POINT_TYPE_P (type
))
4509 free_lang_data_in_one_sizepos (&TYPE_MIN_VALUE (type
));
4510 free_lang_data_in_one_sizepos (&TYPE_MAX_VALUE (type
));
4514 free_lang_data_in_one_sizepos (&TYPE_SIZE (type
));
4515 free_lang_data_in_one_sizepos (&TYPE_SIZE_UNIT (type
));
4517 if (debug_info_level
< DINFO_LEVEL_TERSE
4518 || (TYPE_CONTEXT (type
)
4519 && TREE_CODE (TYPE_CONTEXT (type
)) != FUNCTION_DECL
4520 && TREE_CODE (TYPE_CONTEXT (type
)) != NAMESPACE_DECL
))
4521 TYPE_CONTEXT (type
) = NULL_TREE
;
4523 if (debug_info_level
< DINFO_LEVEL_TERSE
)
4524 TYPE_STUB_DECL (type
) = NULL_TREE
;
4528 /* Return true if DECL may need an assembler name to be set. */
4531 need_assembler_name_p (tree decl
)
4533 /* Only FUNCTION_DECLs and VAR_DECLs are considered. */
4534 if (TREE_CODE (decl
) != FUNCTION_DECL
4535 && TREE_CODE (decl
) != VAR_DECL
)
4538 /* If DECL already has its assembler name set, it does not need a
4540 if (!HAS_DECL_ASSEMBLER_NAME_P (decl
)
4541 || DECL_ASSEMBLER_NAME_SET_P (decl
))
4544 /* Abstract decls do not need an assembler name. */
4545 if (DECL_ABSTRACT (decl
))
4548 /* For VAR_DECLs, only static, public and external symbols need an
4550 if (TREE_CODE (decl
) == VAR_DECL
4551 && !TREE_STATIC (decl
)
4552 && !TREE_PUBLIC (decl
)
4553 && !DECL_EXTERNAL (decl
))
4556 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4558 /* Do not set assembler name on builtins. Allow RTL expansion to
4559 decide whether to expand inline or via a regular call. */
4560 if (DECL_BUILT_IN (decl
)
4561 && DECL_BUILT_IN_CLASS (decl
) != BUILT_IN_FRONTEND
)
4564 /* Functions represented in the callgraph need an assembler name. */
4565 if (cgraph_get_node (decl
) != NULL
)
4568 /* Unused and not public functions don't need an assembler name. */
4569 if (!TREE_USED (decl
) && !TREE_PUBLIC (decl
))
4577 /* Reset all language specific information still present in symbol
4581 free_lang_data_in_decl (tree decl
)
4583 gcc_assert (DECL_P (decl
));
4585 /* Give the FE a chance to remove its own data first. */
4586 lang_hooks
.free_lang_data (decl
);
4588 TREE_LANG_FLAG_0 (decl
) = 0;
4589 TREE_LANG_FLAG_1 (decl
) = 0;
4590 TREE_LANG_FLAG_2 (decl
) = 0;
4591 TREE_LANG_FLAG_3 (decl
) = 0;
4592 TREE_LANG_FLAG_4 (decl
) = 0;
4593 TREE_LANG_FLAG_5 (decl
) = 0;
4594 TREE_LANG_FLAG_6 (decl
) = 0;
4596 free_lang_data_in_one_sizepos (&DECL_SIZE (decl
));
4597 free_lang_data_in_one_sizepos (&DECL_SIZE_UNIT (decl
));
4598 if (TREE_CODE (decl
) == FIELD_DECL
)
4599 free_lang_data_in_one_sizepos (&DECL_FIELD_OFFSET (decl
));
4601 /* DECL_FCONTEXT is only used for debug info generation. */
4602 if (TREE_CODE (decl
) == FIELD_DECL
4603 && debug_info_level
< DINFO_LEVEL_TERSE
)
4604 DECL_FCONTEXT (decl
) = NULL_TREE
;
4606 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4608 if (gimple_has_body_p (decl
))
4612 /* If DECL has a gimple body, then the context for its
4613 arguments must be DECL. Otherwise, it doesn't really
4614 matter, as we will not be emitting any code for DECL. In
4615 general, there may be other instances of DECL created by
4616 the front end and since PARM_DECLs are generally shared,
4617 their DECL_CONTEXT changes as the replicas of DECL are
4618 created. The only time where DECL_CONTEXT is important
4619 is for the FUNCTION_DECLs that have a gimple body (since
4620 the PARM_DECL will be used in the function's body). */
4621 for (t
= DECL_ARGUMENTS (decl
); t
; t
= TREE_CHAIN (t
))
4622 DECL_CONTEXT (t
) = decl
;
4625 /* DECL_SAVED_TREE holds the GENERIC representation for DECL.
4626 At this point, it is not needed anymore. */
4627 DECL_SAVED_TREE (decl
) = NULL_TREE
;
4629 /* Clear the abstract origin if it refers to a method. Otherwise
4630 dwarf2out.c will ICE as we clear TYPE_METHODS and thus the
4631 origin will not be output correctly. */
4632 if (DECL_ABSTRACT_ORIGIN (decl
)
4633 && DECL_CONTEXT (DECL_ABSTRACT_ORIGIN (decl
))
4634 && RECORD_OR_UNION_TYPE_P
4635 (DECL_CONTEXT (DECL_ABSTRACT_ORIGIN (decl
))))
4636 DECL_ABSTRACT_ORIGIN (decl
) = NULL_TREE
;
4638 /* Sometimes the C++ frontend doesn't manage to transform a temporary
4639 DECL_VINDEX referring to itself into a vtable slot number as it
4640 should. Happens with functions that are copied and then forgotten
4641 about. Just clear it, it won't matter anymore. */
4642 if (DECL_VINDEX (decl
) && !host_integerp (DECL_VINDEX (decl
), 0))
4643 DECL_VINDEX (decl
) = NULL_TREE
;
4645 else if (TREE_CODE (decl
) == VAR_DECL
)
4647 if ((DECL_EXTERNAL (decl
)
4648 && (!TREE_STATIC (decl
) || !TREE_READONLY (decl
)))
4649 || (decl_function_context (decl
) && !TREE_STATIC (decl
)))
4650 DECL_INITIAL (decl
) = NULL_TREE
;
4652 else if (TREE_CODE (decl
) == TYPE_DECL
)
4653 DECL_INITIAL (decl
) = NULL_TREE
;
4654 else if (TREE_CODE (decl
) == TRANSLATION_UNIT_DECL
4655 && DECL_INITIAL (decl
)
4656 && TREE_CODE (DECL_INITIAL (decl
)) == BLOCK
)
4658 /* Strip builtins from the translation-unit BLOCK. We still have
4659 targets without builtin_decl support and also builtins are
4660 shared nodes and thus we can't use TREE_CHAIN in multiple
4662 tree
*nextp
= &BLOCK_VARS (DECL_INITIAL (decl
));
4666 if (TREE_CODE (var
) == FUNCTION_DECL
4667 && DECL_BUILT_IN (var
))
4668 *nextp
= TREE_CHAIN (var
);
4670 nextp
= &TREE_CHAIN (var
);
4676 /* Data used when collecting DECLs and TYPEs for language data removal. */
4678 struct free_lang_data_d
4680 /* Worklist to avoid excessive recursion. */
4681 VEC(tree
,heap
) *worklist
;
4683 /* Set of traversed objects. Used to avoid duplicate visits. */
4684 struct pointer_set_t
*pset
;
4686 /* Array of symbols to process with free_lang_data_in_decl. */
4687 VEC(tree
,heap
) *decls
;
4689 /* Array of types to process with free_lang_data_in_type. */
4690 VEC(tree
,heap
) *types
;
4694 /* Save all language fields needed to generate proper debug information
4695 for DECL. This saves most fields cleared out by free_lang_data_in_decl. */
4698 save_debug_info_for_decl (tree t
)
4700 /*struct saved_debug_info_d *sdi;*/
4702 gcc_assert (debug_info_level
> DINFO_LEVEL_TERSE
&& t
&& DECL_P (t
));
4704 /* FIXME. Partial implementation for saving debug info removed. */
4708 /* Save all language fields needed to generate proper debug information
4709 for TYPE. This saves most fields cleared out by free_lang_data_in_type. */
4712 save_debug_info_for_type (tree t
)
4714 /*struct saved_debug_info_d *sdi;*/
4716 gcc_assert (debug_info_level
> DINFO_LEVEL_TERSE
&& t
&& TYPE_P (t
));
4718 /* FIXME. Partial implementation for saving debug info removed. */
4722 /* Add type or decl T to one of the list of tree nodes that need their
4723 language data removed. The lists are held inside FLD. */
4726 add_tree_to_fld_list (tree t
, struct free_lang_data_d
*fld
)
4730 VEC_safe_push (tree
, heap
, fld
->decls
, t
);
4731 if (debug_info_level
> DINFO_LEVEL_TERSE
)
4732 save_debug_info_for_decl (t
);
4734 else if (TYPE_P (t
))
4736 VEC_safe_push (tree
, heap
, fld
->types
, t
);
4737 if (debug_info_level
> DINFO_LEVEL_TERSE
)
4738 save_debug_info_for_type (t
);
4744 /* Push tree node T into FLD->WORKLIST. */
4747 fld_worklist_push (tree t
, struct free_lang_data_d
*fld
)
4749 if (t
&& !is_lang_specific (t
) && !pointer_set_contains (fld
->pset
, t
))
4750 VEC_safe_push (tree
, heap
, fld
->worklist
, (t
));
4754 /* Operand callback helper for free_lang_data_in_node. *TP is the
4755 subtree operand being considered. */
4758 find_decls_types_r (tree
*tp
, int *ws
, void *data
)
4761 struct free_lang_data_d
*fld
= (struct free_lang_data_d
*) data
;
4763 if (TREE_CODE (t
) == TREE_LIST
)
4766 /* Language specific nodes will be removed, so there is no need
4767 to gather anything under them. */
4768 if (is_lang_specific (t
))
4776 /* Note that walk_tree does not traverse every possible field in
4777 decls, so we have to do our own traversals here. */
4778 add_tree_to_fld_list (t
, fld
);
4780 fld_worklist_push (DECL_NAME (t
), fld
);
4781 fld_worklist_push (DECL_CONTEXT (t
), fld
);
4782 fld_worklist_push (DECL_SIZE (t
), fld
);
4783 fld_worklist_push (DECL_SIZE_UNIT (t
), fld
);
4785 /* We are going to remove everything under DECL_INITIAL for
4786 TYPE_DECLs. No point walking them. */
4787 if (TREE_CODE (t
) != TYPE_DECL
)
4788 fld_worklist_push (DECL_INITIAL (t
), fld
);
4790 fld_worklist_push (DECL_ATTRIBUTES (t
), fld
);
4791 fld_worklist_push (DECL_ABSTRACT_ORIGIN (t
), fld
);
4793 if (TREE_CODE (t
) == FUNCTION_DECL
)
4795 fld_worklist_push (DECL_ARGUMENTS (t
), fld
);
4796 fld_worklist_push (DECL_RESULT (t
), fld
);
4798 else if (TREE_CODE (t
) == TYPE_DECL
)
4800 fld_worklist_push (DECL_ARGUMENT_FLD (t
), fld
);
4801 fld_worklist_push (DECL_VINDEX (t
), fld
);
4803 else if (TREE_CODE (t
) == FIELD_DECL
)
4805 fld_worklist_push (DECL_FIELD_OFFSET (t
), fld
);
4806 fld_worklist_push (DECL_BIT_FIELD_TYPE (t
), fld
);
4807 fld_worklist_push (DECL_QUALIFIER (t
), fld
);
4808 fld_worklist_push (DECL_FIELD_BIT_OFFSET (t
), fld
);
4809 fld_worklist_push (DECL_FCONTEXT (t
), fld
);
4811 else if (TREE_CODE (t
) == VAR_DECL
)
4813 fld_worklist_push (DECL_SECTION_NAME (t
), fld
);
4814 fld_worklist_push (DECL_COMDAT_GROUP (t
), fld
);
4817 if ((TREE_CODE (t
) == VAR_DECL
|| TREE_CODE (t
) == PARM_DECL
)
4818 && DECL_HAS_VALUE_EXPR_P (t
))
4819 fld_worklist_push (DECL_VALUE_EXPR (t
), fld
);
4821 if (TREE_CODE (t
) != FIELD_DECL
4822 && TREE_CODE (t
) != TYPE_DECL
)
4823 fld_worklist_push (TREE_CHAIN (t
), fld
);
4826 else if (TYPE_P (t
))
4828 /* Note that walk_tree does not traverse every possible field in
4829 types, so we have to do our own traversals here. */
4830 add_tree_to_fld_list (t
, fld
);
4832 if (!RECORD_OR_UNION_TYPE_P (t
))
4833 fld_worklist_push (TYPE_CACHED_VALUES (t
), fld
);
4834 fld_worklist_push (TYPE_SIZE (t
), fld
);
4835 fld_worklist_push (TYPE_SIZE_UNIT (t
), fld
);
4836 fld_worklist_push (TYPE_ATTRIBUTES (t
), fld
);
4837 fld_worklist_push (TYPE_POINTER_TO (t
), fld
);
4838 fld_worklist_push (TYPE_REFERENCE_TO (t
), fld
);
4839 fld_worklist_push (TYPE_NAME (t
), fld
);
4840 /* Do not walk TYPE_NEXT_PTR_TO or TYPE_NEXT_REF_TO. We do not stream
4841 them and thus do not and want not to reach unused pointer types
4843 if (!POINTER_TYPE_P (t
))
4844 fld_worklist_push (TYPE_MINVAL (t
), fld
);
4845 if (!RECORD_OR_UNION_TYPE_P (t
))
4846 fld_worklist_push (TYPE_MAXVAL (t
), fld
);
4847 fld_worklist_push (TYPE_MAIN_VARIANT (t
), fld
);
4848 /* Do not walk TYPE_NEXT_VARIANT. We do not stream it and thus
4849 do not and want not to reach unused variants this way. */
4850 fld_worklist_push (TYPE_CONTEXT (t
), fld
);
4851 /* Do not walk TYPE_CANONICAL. We do not stream it and thus do not
4852 and want not to reach unused types this way. */
4854 if (RECORD_OR_UNION_TYPE_P (t
) && TYPE_BINFO (t
))
4858 for (i
= 0; VEC_iterate (tree
, BINFO_BASE_BINFOS (TYPE_BINFO (t
)),
4860 fld_worklist_push (TREE_TYPE (tem
), fld
);
4861 tem
= BINFO_VIRTUALS (TYPE_BINFO (t
));
4863 /* The Java FE overloads BINFO_VIRTUALS for its own purpose. */
4864 && TREE_CODE (tem
) == TREE_LIST
)
4867 fld_worklist_push (TREE_VALUE (tem
), fld
);
4868 tem
= TREE_CHAIN (tem
);
4872 if (RECORD_OR_UNION_TYPE_P (t
))
4875 /* Push all TYPE_FIELDS - there can be interleaving interesting
4876 and non-interesting things. */
4877 tem
= TYPE_FIELDS (t
);
4880 if (TREE_CODE (tem
) == FIELD_DECL
)
4881 fld_worklist_push (tem
, fld
);
4882 tem
= TREE_CHAIN (tem
);
4886 fld_worklist_push (TREE_CHAIN (t
), fld
);
4889 else if (TREE_CODE (t
) == BLOCK
)
4892 for (tem
= BLOCK_VARS (t
); tem
; tem
= TREE_CHAIN (tem
))
4893 fld_worklist_push (tem
, fld
);
4894 for (tem
= BLOCK_SUBBLOCKS (t
); tem
; tem
= BLOCK_CHAIN (tem
))
4895 fld_worklist_push (tem
, fld
);
4896 fld_worklist_push (BLOCK_ABSTRACT_ORIGIN (t
), fld
);
4899 if (TREE_CODE (t
) != IDENTIFIER_NODE
4900 && CODE_CONTAINS_STRUCT (TREE_CODE (t
), TS_TYPED
))
4901 fld_worklist_push (TREE_TYPE (t
), fld
);
4907 /* Find decls and types in T. */
4910 find_decls_types (tree t
, struct free_lang_data_d
*fld
)
4914 if (!pointer_set_contains (fld
->pset
, t
))
4915 walk_tree (&t
, find_decls_types_r
, fld
, fld
->pset
);
4916 if (VEC_empty (tree
, fld
->worklist
))
4918 t
= VEC_pop (tree
, fld
->worklist
);
4922 /* Translate all the types in LIST with the corresponding runtime
4926 get_eh_types_for_runtime (tree list
)
4930 if (list
== NULL_TREE
)
4933 head
= build_tree_list (0, lookup_type_for_runtime (TREE_VALUE (list
)));
4935 list
= TREE_CHAIN (list
);
4938 tree n
= build_tree_list (0, lookup_type_for_runtime (TREE_VALUE (list
)));
4939 TREE_CHAIN (prev
) = n
;
4940 prev
= TREE_CHAIN (prev
);
4941 list
= TREE_CHAIN (list
);
4948 /* Find decls and types referenced in EH region R and store them in
4949 FLD->DECLS and FLD->TYPES. */
4952 find_decls_types_in_eh_region (eh_region r
, struct free_lang_data_d
*fld
)
4963 /* The types referenced in each catch must first be changed to the
4964 EH types used at runtime. This removes references to FE types
4966 for (c
= r
->u
.eh_try
.first_catch
; c
; c
= c
->next_catch
)
4968 c
->type_list
= get_eh_types_for_runtime (c
->type_list
);
4969 walk_tree (&c
->type_list
, find_decls_types_r
, fld
, fld
->pset
);
4974 case ERT_ALLOWED_EXCEPTIONS
:
4975 r
->u
.allowed
.type_list
4976 = get_eh_types_for_runtime (r
->u
.allowed
.type_list
);
4977 walk_tree (&r
->u
.allowed
.type_list
, find_decls_types_r
, fld
, fld
->pset
);
4980 case ERT_MUST_NOT_THROW
:
4981 walk_tree (&r
->u
.must_not_throw
.failure_decl
,
4982 find_decls_types_r
, fld
, fld
->pset
);
4988 /* Find decls and types referenced in cgraph node N and store them in
4989 FLD->DECLS and FLD->TYPES. Unlike pass_referenced_vars, this will
4990 look for *every* kind of DECL and TYPE node reachable from N,
4991 including those embedded inside types and decls (i.e,, TYPE_DECLs,
4992 NAMESPACE_DECLs, etc). */
4995 find_decls_types_in_node (struct cgraph_node
*n
, struct free_lang_data_d
*fld
)
4998 struct function
*fn
;
5002 find_decls_types (n
->decl
, fld
);
5004 if (!gimple_has_body_p (n
->decl
))
5007 gcc_assert (current_function_decl
== NULL_TREE
&& cfun
== NULL
);
5009 fn
= DECL_STRUCT_FUNCTION (n
->decl
);
5011 /* Traverse locals. */
5012 FOR_EACH_LOCAL_DECL (fn
, ix
, t
)
5013 find_decls_types (t
, fld
);
5015 /* Traverse EH regions in FN. */
5018 FOR_ALL_EH_REGION_FN (r
, fn
)
5019 find_decls_types_in_eh_region (r
, fld
);
5022 /* Traverse every statement in FN. */
5023 FOR_EACH_BB_FN (bb
, fn
)
5025 gimple_stmt_iterator si
;
5028 for (si
= gsi_start_phis (bb
); !gsi_end_p (si
); gsi_next (&si
))
5030 gimple phi
= gsi_stmt (si
);
5032 for (i
= 0; i
< gimple_phi_num_args (phi
); i
++)
5034 tree
*arg_p
= gimple_phi_arg_def_ptr (phi
, i
);
5035 find_decls_types (*arg_p
, fld
);
5039 for (si
= gsi_start_bb (bb
); !gsi_end_p (si
); gsi_next (&si
))
5041 gimple stmt
= gsi_stmt (si
);
5043 for (i
= 0; i
< gimple_num_ops (stmt
); i
++)
5045 tree arg
= gimple_op (stmt
, i
);
5046 find_decls_types (arg
, fld
);
5053 /* Find decls and types referenced in varpool node N and store them in
5054 FLD->DECLS and FLD->TYPES. Unlike pass_referenced_vars, this will
5055 look for *every* kind of DECL and TYPE node reachable from N,
5056 including those embedded inside types and decls (i.e,, TYPE_DECLs,
5057 NAMESPACE_DECLs, etc). */
5060 find_decls_types_in_var (struct varpool_node
*v
, struct free_lang_data_d
*fld
)
5062 find_decls_types (v
->decl
, fld
);
5065 /* If T needs an assembler name, have one created for it. */
5068 assign_assembler_name_if_neeeded (tree t
)
5070 if (need_assembler_name_p (t
))
5072 /* When setting DECL_ASSEMBLER_NAME, the C++ mangler may emit
5073 diagnostics that use input_location to show locus
5074 information. The problem here is that, at this point,
5075 input_location is generally anchored to the end of the file
5076 (since the parser is long gone), so we don't have a good
5077 position to pin it to.
5079 To alleviate this problem, this uses the location of T's
5080 declaration. Examples of this are
5081 testsuite/g++.dg/template/cond2.C and
5082 testsuite/g++.dg/template/pr35240.C. */
5083 location_t saved_location
= input_location
;
5084 input_location
= DECL_SOURCE_LOCATION (t
);
5086 decl_assembler_name (t
);
5088 input_location
= saved_location
;
5093 /* Free language specific information for every operand and expression
5094 in every node of the call graph. This process operates in three stages:
5096 1- Every callgraph node and varpool node is traversed looking for
5097 decls and types embedded in them. This is a more exhaustive
5098 search than that done by find_referenced_vars, because it will
5099 also collect individual fields, decls embedded in types, etc.
5101 2- All the decls found are sent to free_lang_data_in_decl.
5103 3- All the types found are sent to free_lang_data_in_type.
5105 The ordering between decls and types is important because
5106 free_lang_data_in_decl sets assembler names, which includes
5107 mangling. So types cannot be freed up until assembler names have
5111 free_lang_data_in_cgraph (void)
5113 struct cgraph_node
*n
;
5114 struct varpool_node
*v
;
5115 struct free_lang_data_d fld
;
5120 /* Initialize sets and arrays to store referenced decls and types. */
5121 fld
.pset
= pointer_set_create ();
5122 fld
.worklist
= NULL
;
5123 fld
.decls
= VEC_alloc (tree
, heap
, 100);
5124 fld
.types
= VEC_alloc (tree
, heap
, 100);
5126 /* Find decls and types in the body of every function in the callgraph. */
5127 for (n
= cgraph_nodes
; n
; n
= n
->next
)
5128 find_decls_types_in_node (n
, &fld
);
5130 FOR_EACH_VEC_ELT (alias_pair
, alias_pairs
, i
, p
)
5131 find_decls_types (p
->decl
, &fld
);
5133 /* Find decls and types in every varpool symbol. */
5134 for (v
= varpool_nodes
; v
; v
= v
->next
)
5135 find_decls_types_in_var (v
, &fld
);
5137 /* Set the assembler name on every decl found. We need to do this
5138 now because free_lang_data_in_decl will invalidate data needed
5139 for mangling. This breaks mangling on interdependent decls. */
5140 FOR_EACH_VEC_ELT (tree
, fld
.decls
, i
, t
)
5141 assign_assembler_name_if_neeeded (t
);
5143 /* Traverse every decl found freeing its language data. */
5144 FOR_EACH_VEC_ELT (tree
, fld
.decls
, i
, t
)
5145 free_lang_data_in_decl (t
);
5147 /* Traverse every type found freeing its language data. */
5148 FOR_EACH_VEC_ELT (tree
, fld
.types
, i
, t
)
5149 free_lang_data_in_type (t
);
5151 pointer_set_destroy (fld
.pset
);
5152 VEC_free (tree
, heap
, fld
.worklist
);
5153 VEC_free (tree
, heap
, fld
.decls
);
5154 VEC_free (tree
, heap
, fld
.types
);
5158 /* Free resources that are used by FE but are not needed once they are done. */
5161 free_lang_data (void)
5165 /* If we are the LTO frontend we have freed lang-specific data already. */
5167 || !flag_generate_lto
)
5170 /* Allocate and assign alias sets to the standard integer types
5171 while the slots are still in the way the frontends generated them. */
5172 for (i
= 0; i
< itk_none
; ++i
)
5173 if (integer_types
[i
])
5174 TYPE_ALIAS_SET (integer_types
[i
]) = get_alias_set (integer_types
[i
]);
5176 /* Traverse the IL resetting language specific information for
5177 operands, expressions, etc. */
5178 free_lang_data_in_cgraph ();
5180 /* Create gimple variants for common types. */
5181 ptrdiff_type_node
= integer_type_node
;
5182 fileptr_type_node
= ptr_type_node
;
5184 /* Reset some langhooks. Do not reset types_compatible_p, it may
5185 still be used indirectly via the get_alias_set langhook. */
5186 lang_hooks
.callgraph
.analyze_expr
= NULL
;
5187 lang_hooks
.dwarf_name
= lhd_dwarf_name
;
5188 lang_hooks
.decl_printable_name
= gimple_decl_printable_name
;
5189 /* We do not want the default decl_assembler_name implementation,
5190 rather if we have fixed everything we want a wrapper around it
5191 asserting that all non-local symbols already got their assembler
5192 name and only produce assembler names for local symbols. Or rather
5193 make sure we never call decl_assembler_name on local symbols and
5194 devise a separate, middle-end private scheme for it. */
5196 /* Reset diagnostic machinery. */
5197 diagnostic_starter (global_dc
) = default_tree_diagnostic_starter
;
5198 diagnostic_finalizer (global_dc
) = default_diagnostic_finalizer
;
5199 diagnostic_format_decoder (global_dc
) = default_tree_printer
;
5205 struct simple_ipa_opt_pass pass_ipa_free_lang_data
=
5209 "*free_lang_data", /* name */
5211 free_lang_data
, /* execute */
5214 0, /* static_pass_number */
5215 TV_IPA_FREE_LANG_DATA
, /* tv_id */
5216 0, /* properties_required */
5217 0, /* properties_provided */
5218 0, /* properties_destroyed */
5219 0, /* todo_flags_start */
5220 TODO_ggc_collect
/* todo_flags_finish */
5224 /* The backbone of is_attribute_p(). ATTR_LEN is the string length of
5225 ATTR_NAME. Also used internally by remove_attribute(). */
5227 private_is_attribute_p (const char *attr_name
, size_t attr_len
, const_tree ident
)
5229 size_t ident_len
= IDENTIFIER_LENGTH (ident
);
5231 if (ident_len
== attr_len
)
5233 if (strcmp (attr_name
, IDENTIFIER_POINTER (ident
)) == 0)
5236 else if (ident_len
== attr_len
+ 4)
5238 /* There is the possibility that ATTR is 'text' and IDENT is
5240 const char *p
= IDENTIFIER_POINTER (ident
);
5241 if (p
[0] == '_' && p
[1] == '_'
5242 && p
[ident_len
- 2] == '_' && p
[ident_len
- 1] == '_'
5243 && strncmp (attr_name
, p
+ 2, attr_len
) == 0)
5250 /* The backbone of lookup_attribute(). ATTR_LEN is the string length
5251 of ATTR_NAME, and LIST is not NULL_TREE. */
5253 private_lookup_attribute (const char *attr_name
, size_t attr_len
, tree list
)
5257 size_t ident_len
= IDENTIFIER_LENGTH (TREE_PURPOSE (list
));
5259 if (ident_len
== attr_len
)
5261 if (strcmp (attr_name
, IDENTIFIER_POINTER (TREE_PURPOSE (list
))) == 0)
5264 /* TODO: If we made sure that attributes were stored in the
5265 canonical form without '__...__' (ie, as in 'text' as opposed
5266 to '__text__') then we could avoid the following case. */
5267 else if (ident_len
== attr_len
+ 4)
5269 const char *p
= IDENTIFIER_POINTER (TREE_PURPOSE (list
));
5270 if (p
[0] == '_' && p
[1] == '_'
5271 && p
[ident_len
- 2] == '_' && p
[ident_len
- 1] == '_'
5272 && strncmp (attr_name
, p
+ 2, attr_len
) == 0)
5275 list
= TREE_CHAIN (list
);
5281 /* A variant of lookup_attribute() that can be used with an identifier
5282 as the first argument, and where the identifier can be either
5283 'text' or '__text__'.
5285 Given an attribute ATTR_IDENTIFIER, and a list of attributes LIST,
5286 return a pointer to the attribute's list element if the attribute
5287 is part of the list, or NULL_TREE if not found. If the attribute
5288 appears more than once, this only returns the first occurrence; the
5289 TREE_CHAIN of the return value should be passed back in if further
5290 occurrences are wanted. ATTR_IDENTIFIER must be an identifier but
5291 can be in the form 'text' or '__text__'. */
5293 lookup_ident_attribute (tree attr_identifier
, tree list
)
5295 gcc_checking_assert (TREE_CODE (attr_identifier
) == IDENTIFIER_NODE
);
5299 gcc_checking_assert (TREE_CODE (TREE_PURPOSE (list
)) == IDENTIFIER_NODE
);
5301 /* Identifiers can be compared directly for equality. */
5302 if (attr_identifier
== TREE_PURPOSE (list
))
5305 /* If they are not equal, they may still be one in the form
5306 'text' while the other one is in the form '__text__'. TODO:
5307 If we were storing attributes in normalized 'text' form, then
5308 this could all go away and we could take full advantage of
5309 the fact that we're comparing identifiers. :-) */
5311 size_t attr_len
= IDENTIFIER_LENGTH (attr_identifier
);
5312 size_t ident_len
= IDENTIFIER_LENGTH (TREE_PURPOSE (list
));
5314 if (ident_len
== attr_len
+ 4)
5316 const char *p
= IDENTIFIER_POINTER (TREE_PURPOSE (list
));
5317 const char *q
= IDENTIFIER_POINTER (attr_identifier
);
5318 if (p
[0] == '_' && p
[1] == '_'
5319 && p
[ident_len
- 2] == '_' && p
[ident_len
- 1] == '_'
5320 && strncmp (q
, p
+ 2, attr_len
) == 0)
5323 else if (ident_len
+ 4 == attr_len
)
5325 const char *p
= IDENTIFIER_POINTER (TREE_PURPOSE (list
));
5326 const char *q
= IDENTIFIER_POINTER (attr_identifier
);
5327 if (q
[0] == '_' && q
[1] == '_'
5328 && q
[attr_len
- 2] == '_' && q
[attr_len
- 1] == '_'
5329 && strncmp (q
+ 2, p
, ident_len
) == 0)
5333 list
= TREE_CHAIN (list
);
5339 /* Remove any instances of attribute ATTR_NAME in LIST and return the
5343 remove_attribute (const char *attr_name
, tree list
)
5346 size_t attr_len
= strlen (attr_name
);
5348 gcc_checking_assert (attr_name
[0] != '_');
5350 for (p
= &list
; *p
; )
5353 /* TODO: If we were storing attributes in normalized form, here
5354 we could use a simple strcmp(). */
5355 if (private_is_attribute_p (attr_name
, attr_len
, TREE_PURPOSE (l
)))
5356 *p
= TREE_CHAIN (l
);
5358 p
= &TREE_CHAIN (l
);
5364 /* Return an attribute list that is the union of a1 and a2. */
5367 merge_attributes (tree a1
, tree a2
)
5371 /* Either one unset? Take the set one. */
5373 if ((attributes
= a1
) == 0)
5376 /* One that completely contains the other? Take it. */
5378 else if (a2
!= 0 && ! attribute_list_contained (a1
, a2
))
5380 if (attribute_list_contained (a2
, a1
))
5384 /* Pick the longest list, and hang on the other list. */
5386 if (list_length (a1
) < list_length (a2
))
5387 attributes
= a2
, a2
= a1
;
5389 for (; a2
!= 0; a2
= TREE_CHAIN (a2
))
5392 for (a
= lookup_ident_attribute (TREE_PURPOSE (a2
), attributes
);
5393 a
!= NULL_TREE
&& !attribute_value_equal (a
, a2
);
5394 a
= lookup_ident_attribute (TREE_PURPOSE (a2
), TREE_CHAIN (a
)))
5398 a1
= copy_node (a2
);
5399 TREE_CHAIN (a1
) = attributes
;
5408 /* Given types T1 and T2, merge their attributes and return
5412 merge_type_attributes (tree t1
, tree t2
)
5414 return merge_attributes (TYPE_ATTRIBUTES (t1
),
5415 TYPE_ATTRIBUTES (t2
));
5418 /* Given decls OLDDECL and NEWDECL, merge their attributes and return
5422 merge_decl_attributes (tree olddecl
, tree newdecl
)
5424 return merge_attributes (DECL_ATTRIBUTES (olddecl
),
5425 DECL_ATTRIBUTES (newdecl
));
5428 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
5430 /* Specialization of merge_decl_attributes for various Windows targets.
5432 This handles the following situation:
5434 __declspec (dllimport) int foo;
5437 The second instance of `foo' nullifies the dllimport. */
5440 merge_dllimport_decl_attributes (tree old
, tree new_tree
)
5443 int delete_dllimport_p
= 1;
5445 /* What we need to do here is remove from `old' dllimport if it doesn't
5446 appear in `new'. dllimport behaves like extern: if a declaration is
5447 marked dllimport and a definition appears later, then the object
5448 is not dllimport'd. We also remove a `new' dllimport if the old list
5449 contains dllexport: dllexport always overrides dllimport, regardless
5450 of the order of declaration. */
5451 if (!VAR_OR_FUNCTION_DECL_P (new_tree
))
5452 delete_dllimport_p
= 0;
5453 else if (DECL_DLLIMPORT_P (new_tree
)
5454 && lookup_attribute ("dllexport", DECL_ATTRIBUTES (old
)))
5456 DECL_DLLIMPORT_P (new_tree
) = 0;
5457 warning (OPT_Wattributes
, "%q+D already declared with dllexport attribute: "
5458 "dllimport ignored", new_tree
);
5460 else if (DECL_DLLIMPORT_P (old
) && !DECL_DLLIMPORT_P (new_tree
))
5462 /* Warn about overriding a symbol that has already been used, e.g.:
5463 extern int __attribute__ ((dllimport)) foo;
5464 int* bar () {return &foo;}
5467 if (TREE_USED (old
))
5469 warning (0, "%q+D redeclared without dllimport attribute "
5470 "after being referenced with dll linkage", new_tree
);
5471 /* If we have used a variable's address with dllimport linkage,
5472 keep the old DECL_DLLIMPORT_P flag: the ADDR_EXPR using the
5473 decl may already have had TREE_CONSTANT computed.
5474 We still remove the attribute so that assembler code refers
5475 to '&foo rather than '_imp__foo'. */
5476 if (TREE_CODE (old
) == VAR_DECL
&& TREE_ADDRESSABLE (old
))
5477 DECL_DLLIMPORT_P (new_tree
) = 1;
5480 /* Let an inline definition silently override the external reference,
5481 but otherwise warn about attribute inconsistency. */
5482 else if (TREE_CODE (new_tree
) == VAR_DECL
5483 || !DECL_DECLARED_INLINE_P (new_tree
))
5484 warning (OPT_Wattributes
, "%q+D redeclared without dllimport attribute: "
5485 "previous dllimport ignored", new_tree
);
5488 delete_dllimport_p
= 0;
5490 a
= merge_attributes (DECL_ATTRIBUTES (old
), DECL_ATTRIBUTES (new_tree
));
5492 if (delete_dllimport_p
)
5493 a
= remove_attribute ("dllimport", a
);
5498 /* Handle a "dllimport" or "dllexport" attribute; arguments as in
5499 struct attribute_spec.handler. */
5502 handle_dll_attribute (tree
* pnode
, tree name
, tree args
, int flags
,
5508 /* These attributes may apply to structure and union types being created,
5509 but otherwise should pass to the declaration involved. */
5512 if (flags
& ((int) ATTR_FLAG_DECL_NEXT
| (int) ATTR_FLAG_FUNCTION_NEXT
5513 | (int) ATTR_FLAG_ARRAY_NEXT
))
5515 *no_add_attrs
= true;
5516 return tree_cons (name
, args
, NULL_TREE
);
5518 if (TREE_CODE (node
) == RECORD_TYPE
5519 || TREE_CODE (node
) == UNION_TYPE
)
5521 node
= TYPE_NAME (node
);
5527 warning (OPT_Wattributes
, "%qE attribute ignored",
5529 *no_add_attrs
= true;
5534 if (TREE_CODE (node
) != FUNCTION_DECL
5535 && TREE_CODE (node
) != VAR_DECL
5536 && TREE_CODE (node
) != TYPE_DECL
)
5538 *no_add_attrs
= true;
5539 warning (OPT_Wattributes
, "%qE attribute ignored",
5544 if (TREE_CODE (node
) == TYPE_DECL
5545 && TREE_CODE (TREE_TYPE (node
)) != RECORD_TYPE
5546 && TREE_CODE (TREE_TYPE (node
)) != UNION_TYPE
)
5548 *no_add_attrs
= true;
5549 warning (OPT_Wattributes
, "%qE attribute ignored",
5554 is_dllimport
= is_attribute_p ("dllimport", name
);
5556 /* Report error on dllimport ambiguities seen now before they cause
5560 /* Honor any target-specific overrides. */
5561 if (!targetm
.valid_dllimport_attribute_p (node
))
5562 *no_add_attrs
= true;
5564 else if (TREE_CODE (node
) == FUNCTION_DECL
5565 && DECL_DECLARED_INLINE_P (node
))
5567 warning (OPT_Wattributes
, "inline function %q+D declared as "
5568 " dllimport: attribute ignored", node
);
5569 *no_add_attrs
= true;
5571 /* Like MS, treat definition of dllimported variables and
5572 non-inlined functions on declaration as syntax errors. */
5573 else if (TREE_CODE (node
) == FUNCTION_DECL
&& DECL_INITIAL (node
))
5575 error ("function %q+D definition is marked dllimport", node
);
5576 *no_add_attrs
= true;
5579 else if (TREE_CODE (node
) == VAR_DECL
)
5581 if (DECL_INITIAL (node
))
5583 error ("variable %q+D definition is marked dllimport",
5585 *no_add_attrs
= true;
5588 /* `extern' needn't be specified with dllimport.
5589 Specify `extern' now and hope for the best. Sigh. */
5590 DECL_EXTERNAL (node
) = 1;
5591 /* Also, implicitly give dllimport'd variables declared within
5592 a function global scope, unless declared static. */
5593 if (current_function_decl
!= NULL_TREE
&& !TREE_STATIC (node
))
5594 TREE_PUBLIC (node
) = 1;
5597 if (*no_add_attrs
== false)
5598 DECL_DLLIMPORT_P (node
) = 1;
5600 else if (TREE_CODE (node
) == FUNCTION_DECL
5601 && DECL_DECLARED_INLINE_P (node
)
5602 && flag_keep_inline_dllexport
)
5603 /* An exported function, even if inline, must be emitted. */
5604 DECL_EXTERNAL (node
) = 0;
5606 /* Report error if symbol is not accessible at global scope. */
5607 if (!TREE_PUBLIC (node
)
5608 && (TREE_CODE (node
) == VAR_DECL
5609 || TREE_CODE (node
) == FUNCTION_DECL
))
5611 error ("external linkage required for symbol %q+D because of "
5612 "%qE attribute", node
, name
);
5613 *no_add_attrs
= true;
5616 /* A dllexport'd entity must have default visibility so that other
5617 program units (shared libraries or the main executable) can see
5618 it. A dllimport'd entity must have default visibility so that
5619 the linker knows that undefined references within this program
5620 unit can be resolved by the dynamic linker. */
5623 if (DECL_VISIBILITY_SPECIFIED (node
)
5624 && DECL_VISIBILITY (node
) != VISIBILITY_DEFAULT
)
5625 error ("%qE implies default visibility, but %qD has already "
5626 "been declared with a different visibility",
5628 DECL_VISIBILITY (node
) = VISIBILITY_DEFAULT
;
5629 DECL_VISIBILITY_SPECIFIED (node
) = 1;
5635 #endif /* TARGET_DLLIMPORT_DECL_ATTRIBUTES */
5637 /* Set the type qualifiers for TYPE to TYPE_QUALS, which is a bitmask
5638 of the various TYPE_QUAL values. */
5641 set_type_quals (tree type
, int type_quals
)
5643 TYPE_READONLY (type
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
5644 TYPE_VOLATILE (type
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
5645 TYPE_RESTRICT (type
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
5646 TYPE_ADDR_SPACE (type
) = DECODE_QUAL_ADDR_SPACE (type_quals
);
5649 /* Returns true iff CAND is equivalent to BASE with TYPE_QUALS. */
5652 check_qualified_type (const_tree cand
, const_tree base
, int type_quals
)
5654 return (TYPE_QUALS (cand
) == type_quals
5655 && TYPE_NAME (cand
) == TYPE_NAME (base
)
5656 /* Apparently this is needed for Objective-C. */
5657 && TYPE_CONTEXT (cand
) == TYPE_CONTEXT (base
)
5658 /* Check alignment. */
5659 && TYPE_ALIGN (cand
) == TYPE_ALIGN (base
)
5660 && attribute_list_equal (TYPE_ATTRIBUTES (cand
),
5661 TYPE_ATTRIBUTES (base
)));
5664 /* Returns true iff CAND is equivalent to BASE with ALIGN. */
5667 check_aligned_type (const_tree cand
, const_tree base
, unsigned int align
)
5669 return (TYPE_QUALS (cand
) == TYPE_QUALS (base
)
5670 && TYPE_NAME (cand
) == TYPE_NAME (base
)
5671 /* Apparently this is needed for Objective-C. */
5672 && TYPE_CONTEXT (cand
) == TYPE_CONTEXT (base
)
5673 /* Check alignment. */
5674 && TYPE_ALIGN (cand
) == align
5675 && attribute_list_equal (TYPE_ATTRIBUTES (cand
),
5676 TYPE_ATTRIBUTES (base
)));
5679 /* Return a version of the TYPE, qualified as indicated by the
5680 TYPE_QUALS, if one exists. If no qualified version exists yet,
5681 return NULL_TREE. */
5684 get_qualified_type (tree type
, int type_quals
)
5688 if (TYPE_QUALS (type
) == type_quals
)
5691 /* Search the chain of variants to see if there is already one there just
5692 like the one we need to have. If so, use that existing one. We must
5693 preserve the TYPE_NAME, since there is code that depends on this. */
5694 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
5695 if (check_qualified_type (t
, type
, type_quals
))
5701 /* Like get_qualified_type, but creates the type if it does not
5702 exist. This function never returns NULL_TREE. */
5705 build_qualified_type (tree type
, int type_quals
)
5709 /* See if we already have the appropriate qualified variant. */
5710 t
= get_qualified_type (type
, type_quals
);
5712 /* If not, build it. */
5715 t
= build_variant_type_copy (type
);
5716 set_type_quals (t
, type_quals
);
5718 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
5719 /* Propagate structural equality. */
5720 SET_TYPE_STRUCTURAL_EQUALITY (t
);
5721 else if (TYPE_CANONICAL (type
) != type
)
5722 /* Build the underlying canonical type, since it is different
5724 TYPE_CANONICAL (t
) = build_qualified_type (TYPE_CANONICAL (type
),
5727 /* T is its own canonical type. */
5728 TYPE_CANONICAL (t
) = t
;
5735 /* Create a variant of type T with alignment ALIGN. */
5738 build_aligned_type (tree type
, unsigned int align
)
5742 if (TYPE_PACKED (type
)
5743 || TYPE_ALIGN (type
) == align
)
5746 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
5747 if (check_aligned_type (t
, type
, align
))
5750 t
= build_variant_type_copy (type
);
5751 TYPE_ALIGN (t
) = align
;
5756 /* Create a new distinct copy of TYPE. The new type is made its own
5757 MAIN_VARIANT. If TYPE requires structural equality checks, the
5758 resulting type requires structural equality checks; otherwise, its
5759 TYPE_CANONICAL points to itself. */
5762 build_distinct_type_copy (tree type
)
5764 tree t
= copy_node (type
);
5766 TYPE_POINTER_TO (t
) = 0;
5767 TYPE_REFERENCE_TO (t
) = 0;
5769 /* Set the canonical type either to a new equivalence class, or
5770 propagate the need for structural equality checks. */
5771 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
5772 SET_TYPE_STRUCTURAL_EQUALITY (t
);
5774 TYPE_CANONICAL (t
) = t
;
5776 /* Make it its own variant. */
5777 TYPE_MAIN_VARIANT (t
) = t
;
5778 TYPE_NEXT_VARIANT (t
) = 0;
5780 /* Note that it is now possible for TYPE_MIN_VALUE to be a value
5781 whose TREE_TYPE is not t. This can also happen in the Ada
5782 frontend when using subtypes. */
5787 /* Create a new variant of TYPE, equivalent but distinct. This is so
5788 the caller can modify it. TYPE_CANONICAL for the return type will
5789 be equivalent to TYPE_CANONICAL of TYPE, indicating that the types
5790 are considered equal by the language itself (or that both types
5791 require structural equality checks). */
5794 build_variant_type_copy (tree type
)
5796 tree t
, m
= TYPE_MAIN_VARIANT (type
);
5798 t
= build_distinct_type_copy (type
);
5800 /* Since we're building a variant, assume that it is a non-semantic
5801 variant. This also propagates TYPE_STRUCTURAL_EQUALITY_P. */
5802 TYPE_CANONICAL (t
) = TYPE_CANONICAL (type
);
5804 /* Add the new type to the chain of variants of TYPE. */
5805 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (m
);
5806 TYPE_NEXT_VARIANT (m
) = t
;
5807 TYPE_MAIN_VARIANT (t
) = m
;
5812 /* Return true if the from tree in both tree maps are equal. */
5815 tree_map_base_eq (const void *va
, const void *vb
)
5817 const struct tree_map_base
*const a
= (const struct tree_map_base
*) va
,
5818 *const b
= (const struct tree_map_base
*) vb
;
5819 return (a
->from
== b
->from
);
5822 /* Hash a from tree in a tree_base_map. */
5825 tree_map_base_hash (const void *item
)
5827 return htab_hash_pointer (((const struct tree_map_base
*)item
)->from
);
5830 /* Return true if this tree map structure is marked for garbage collection
5831 purposes. We simply return true if the from tree is marked, so that this
5832 structure goes away when the from tree goes away. */
5835 tree_map_base_marked_p (const void *p
)
5837 return ggc_marked_p (((const struct tree_map_base
*) p
)->from
);
5840 /* Hash a from tree in a tree_map. */
5843 tree_map_hash (const void *item
)
5845 return (((const struct tree_map
*) item
)->hash
);
5848 /* Hash a from tree in a tree_decl_map. */
5851 tree_decl_map_hash (const void *item
)
5853 return DECL_UID (((const struct tree_decl_map
*) item
)->base
.from
);
5856 /* Return the initialization priority for DECL. */
5859 decl_init_priority_lookup (tree decl
)
5861 struct tree_priority_map
*h
;
5862 struct tree_map_base in
;
5864 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
5866 h
= (struct tree_priority_map
*) htab_find (init_priority_for_decl
, &in
);
5867 return h
? h
->init
: DEFAULT_INIT_PRIORITY
;
5870 /* Return the finalization priority for DECL. */
5873 decl_fini_priority_lookup (tree decl
)
5875 struct tree_priority_map
*h
;
5876 struct tree_map_base in
;
5878 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
);
5880 h
= (struct tree_priority_map
*) htab_find (init_priority_for_decl
, &in
);
5881 return h
? h
->fini
: DEFAULT_INIT_PRIORITY
;
5884 /* Return the initialization and finalization priority information for
5885 DECL. If there is no previous priority information, a freshly
5886 allocated structure is returned. */
5888 static struct tree_priority_map
*
5889 decl_priority_info (tree decl
)
5891 struct tree_priority_map in
;
5892 struct tree_priority_map
*h
;
5895 in
.base
.from
= decl
;
5896 loc
= htab_find_slot (init_priority_for_decl
, &in
, INSERT
);
5897 h
= (struct tree_priority_map
*) *loc
;
5900 h
= ggc_alloc_cleared_tree_priority_map ();
5902 h
->base
.from
= decl
;
5903 h
->init
= DEFAULT_INIT_PRIORITY
;
5904 h
->fini
= DEFAULT_INIT_PRIORITY
;
5910 /* Set the initialization priority for DECL to PRIORITY. */
5913 decl_init_priority_insert (tree decl
, priority_type priority
)
5915 struct tree_priority_map
*h
;
5917 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
5918 if (priority
== DEFAULT_INIT_PRIORITY
)
5920 h
= decl_priority_info (decl
);
5924 /* Set the finalization priority for DECL to PRIORITY. */
5927 decl_fini_priority_insert (tree decl
, priority_type priority
)
5929 struct tree_priority_map
*h
;
5931 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
);
5932 if (priority
== DEFAULT_INIT_PRIORITY
)
5934 h
= decl_priority_info (decl
);
5938 /* Print out the statistics for the DECL_DEBUG_EXPR hash table. */
5941 print_debug_expr_statistics (void)
5943 fprintf (stderr
, "DECL_DEBUG_EXPR hash: size %ld, %ld elements, %f collisions\n",
5944 (long) htab_size (debug_expr_for_decl
),
5945 (long) htab_elements (debug_expr_for_decl
),
5946 htab_collisions (debug_expr_for_decl
));
5949 /* Print out the statistics for the DECL_VALUE_EXPR hash table. */
5952 print_value_expr_statistics (void)
5954 fprintf (stderr
, "DECL_VALUE_EXPR hash: size %ld, %ld elements, %f collisions\n",
5955 (long) htab_size (value_expr_for_decl
),
5956 (long) htab_elements (value_expr_for_decl
),
5957 htab_collisions (value_expr_for_decl
));
5960 /* Lookup a debug expression for FROM, and return it if we find one. */
5963 decl_debug_expr_lookup (tree from
)
5965 struct tree_decl_map
*h
, in
;
5966 in
.base
.from
= from
;
5968 h
= (struct tree_decl_map
*)
5969 htab_find_with_hash (debug_expr_for_decl
, &in
, DECL_UID (from
));
5975 /* Insert a mapping FROM->TO in the debug expression hashtable. */
5978 decl_debug_expr_insert (tree from
, tree to
)
5980 struct tree_decl_map
*h
;
5983 h
= ggc_alloc_tree_decl_map ();
5984 h
->base
.from
= from
;
5986 loc
= htab_find_slot_with_hash (debug_expr_for_decl
, h
, DECL_UID (from
),
5988 *(struct tree_decl_map
**) loc
= h
;
5991 /* Lookup a value expression for FROM, and return it if we find one. */
5994 decl_value_expr_lookup (tree from
)
5996 struct tree_decl_map
*h
, in
;
5997 in
.base
.from
= from
;
5999 h
= (struct tree_decl_map
*)
6000 htab_find_with_hash (value_expr_for_decl
, &in
, DECL_UID (from
));
6006 /* Insert a mapping FROM->TO in the value expression hashtable. */
6009 decl_value_expr_insert (tree from
, tree to
)
6011 struct tree_decl_map
*h
;
6014 h
= ggc_alloc_tree_decl_map ();
6015 h
->base
.from
= from
;
6017 loc
= htab_find_slot_with_hash (value_expr_for_decl
, h
, DECL_UID (from
),
6019 *(struct tree_decl_map
**) loc
= h
;
6022 /* Lookup a vector of debug arguments for FROM, and return it if we
6026 decl_debug_args_lookup (tree from
)
6028 struct tree_vec_map
*h
, in
;
6030 if (!DECL_HAS_DEBUG_ARGS_P (from
))
6032 gcc_checking_assert (debug_args_for_decl
!= NULL
);
6033 in
.base
.from
= from
;
6034 h
= (struct tree_vec_map
*)
6035 htab_find_with_hash (debug_args_for_decl
, &in
, DECL_UID (from
));
6041 /* Insert a mapping FROM->empty vector of debug arguments in the value
6042 expression hashtable. */
6045 decl_debug_args_insert (tree from
)
6047 struct tree_vec_map
*h
;
6050 if (DECL_HAS_DEBUG_ARGS_P (from
))
6051 return decl_debug_args_lookup (from
);
6052 if (debug_args_for_decl
== NULL
)
6053 debug_args_for_decl
= htab_create_ggc (64, tree_vec_map_hash
,
6054 tree_vec_map_eq
, 0);
6055 h
= ggc_alloc_tree_vec_map ();
6056 h
->base
.from
= from
;
6058 loc
= htab_find_slot_with_hash (debug_args_for_decl
, h
, DECL_UID (from
),
6060 *(struct tree_vec_map
**) loc
= h
;
6061 DECL_HAS_DEBUG_ARGS_P (from
) = 1;
6065 /* Hashing of types so that we don't make duplicates.
6066 The entry point is `type_hash_canon'. */
6068 /* Compute a hash code for a list of types (chain of TREE_LIST nodes
6069 with types in the TREE_VALUE slots), by adding the hash codes
6070 of the individual types. */
6073 type_hash_list (const_tree list
, hashval_t hashcode
)
6077 for (tail
= list
; tail
; tail
= TREE_CHAIN (tail
))
6078 if (TREE_VALUE (tail
) != error_mark_node
)
6079 hashcode
= iterative_hash_object (TYPE_HASH (TREE_VALUE (tail
)),
6085 /* These are the Hashtable callback functions. */
6087 /* Returns true iff the types are equivalent. */
6090 type_hash_eq (const void *va
, const void *vb
)
6092 const struct type_hash
*const a
= (const struct type_hash
*) va
,
6093 *const b
= (const struct type_hash
*) vb
;
6095 /* First test the things that are the same for all types. */
6096 if (a
->hash
!= b
->hash
6097 || TREE_CODE (a
->type
) != TREE_CODE (b
->type
)
6098 || TREE_TYPE (a
->type
) != TREE_TYPE (b
->type
)
6099 || !attribute_list_equal (TYPE_ATTRIBUTES (a
->type
),
6100 TYPE_ATTRIBUTES (b
->type
))
6101 || (TREE_CODE (a
->type
) != COMPLEX_TYPE
6102 && TYPE_NAME (a
->type
) != TYPE_NAME (b
->type
)))
6105 /* Be careful about comparing arrays before and after the element type
6106 has been completed; don't compare TYPE_ALIGN unless both types are
6108 if (COMPLETE_TYPE_P (a
->type
) && COMPLETE_TYPE_P (b
->type
)
6109 && (TYPE_ALIGN (a
->type
) != TYPE_ALIGN (b
->type
)
6110 || TYPE_MODE (a
->type
) != TYPE_MODE (b
->type
)))
6113 switch (TREE_CODE (a
->type
))
6118 case REFERENCE_TYPE
:
6122 return TYPE_VECTOR_SUBPARTS (a
->type
) == TYPE_VECTOR_SUBPARTS (b
->type
);
6125 if (TYPE_VALUES (a
->type
) != TYPE_VALUES (b
->type
)
6126 && !(TYPE_VALUES (a
->type
)
6127 && TREE_CODE (TYPE_VALUES (a
->type
)) == TREE_LIST
6128 && TYPE_VALUES (b
->type
)
6129 && TREE_CODE (TYPE_VALUES (b
->type
)) == TREE_LIST
6130 && type_list_equal (TYPE_VALUES (a
->type
),
6131 TYPE_VALUES (b
->type
))))
6134 /* ... fall through ... */
6139 return ((TYPE_MAX_VALUE (a
->type
) == TYPE_MAX_VALUE (b
->type
)
6140 || tree_int_cst_equal (TYPE_MAX_VALUE (a
->type
),
6141 TYPE_MAX_VALUE (b
->type
)))
6142 && (TYPE_MIN_VALUE (a
->type
) == TYPE_MIN_VALUE (b
->type
)
6143 || tree_int_cst_equal (TYPE_MIN_VALUE (a
->type
),
6144 TYPE_MIN_VALUE (b
->type
))));
6146 case FIXED_POINT_TYPE
:
6147 return TYPE_SATURATING (a
->type
) == TYPE_SATURATING (b
->type
);
6150 return TYPE_OFFSET_BASETYPE (a
->type
) == TYPE_OFFSET_BASETYPE (b
->type
);
6153 if (TYPE_METHOD_BASETYPE (a
->type
) == TYPE_METHOD_BASETYPE (b
->type
)
6154 && (TYPE_ARG_TYPES (a
->type
) == TYPE_ARG_TYPES (b
->type
)
6155 || (TYPE_ARG_TYPES (a
->type
)
6156 && TREE_CODE (TYPE_ARG_TYPES (a
->type
)) == TREE_LIST
6157 && TYPE_ARG_TYPES (b
->type
)
6158 && TREE_CODE (TYPE_ARG_TYPES (b
->type
)) == TREE_LIST
6159 && type_list_equal (TYPE_ARG_TYPES (a
->type
),
6160 TYPE_ARG_TYPES (b
->type
)))))
6164 return TYPE_DOMAIN (a
->type
) == TYPE_DOMAIN (b
->type
);
6168 case QUAL_UNION_TYPE
:
6169 return (TYPE_FIELDS (a
->type
) == TYPE_FIELDS (b
->type
)
6170 || (TYPE_FIELDS (a
->type
)
6171 && TREE_CODE (TYPE_FIELDS (a
->type
)) == TREE_LIST
6172 && TYPE_FIELDS (b
->type
)
6173 && TREE_CODE (TYPE_FIELDS (b
->type
)) == TREE_LIST
6174 && type_list_equal (TYPE_FIELDS (a
->type
),
6175 TYPE_FIELDS (b
->type
))));
6178 if (TYPE_ARG_TYPES (a
->type
) == TYPE_ARG_TYPES (b
->type
)
6179 || (TYPE_ARG_TYPES (a
->type
)
6180 && TREE_CODE (TYPE_ARG_TYPES (a
->type
)) == TREE_LIST
6181 && TYPE_ARG_TYPES (b
->type
)
6182 && TREE_CODE (TYPE_ARG_TYPES (b
->type
)) == TREE_LIST
6183 && type_list_equal (TYPE_ARG_TYPES (a
->type
),
6184 TYPE_ARG_TYPES (b
->type
))))
6192 if (lang_hooks
.types
.type_hash_eq
!= NULL
)
6193 return lang_hooks
.types
.type_hash_eq (a
->type
, b
->type
);
6198 /* Return the cached hash value. */
6201 type_hash_hash (const void *item
)
6203 return ((const struct type_hash
*) item
)->hash
;
6206 /* Look in the type hash table for a type isomorphic to TYPE.
6207 If one is found, return it. Otherwise return 0. */
6210 type_hash_lookup (hashval_t hashcode
, tree type
)
6212 struct type_hash
*h
, in
;
6214 /* The TYPE_ALIGN field of a type is set by layout_type(), so we
6215 must call that routine before comparing TYPE_ALIGNs. */
6221 h
= (struct type_hash
*) htab_find_with_hash (type_hash_table
, &in
,
6228 /* Add an entry to the type-hash-table
6229 for a type TYPE whose hash code is HASHCODE. */
6232 type_hash_add (hashval_t hashcode
, tree type
)
6234 struct type_hash
*h
;
6237 h
= ggc_alloc_type_hash ();
6240 loc
= htab_find_slot_with_hash (type_hash_table
, h
, hashcode
, INSERT
);
6244 /* Given TYPE, and HASHCODE its hash code, return the canonical
6245 object for an identical type if one already exists.
6246 Otherwise, return TYPE, and record it as the canonical object.
6248 To use this function, first create a type of the sort you want.
6249 Then compute its hash code from the fields of the type that
6250 make it different from other similar types.
6251 Then call this function and use the value. */
6254 type_hash_canon (unsigned int hashcode
, tree type
)
6258 /* The hash table only contains main variants, so ensure that's what we're
6260 gcc_assert (TYPE_MAIN_VARIANT (type
) == type
);
6262 /* See if the type is in the hash table already. If so, return it.
6263 Otherwise, add the type. */
6264 t1
= type_hash_lookup (hashcode
, type
);
6267 #ifdef GATHER_STATISTICS
6268 tree_code_counts
[(int) TREE_CODE (type
)]--;
6269 tree_node_counts
[(int) t_kind
]--;
6270 tree_node_sizes
[(int) t_kind
] -= sizeof (struct tree_type_non_common
);
6276 type_hash_add (hashcode
, type
);
6281 /* See if the data pointed to by the type hash table is marked. We consider
6282 it marked if the type is marked or if a debug type number or symbol
6283 table entry has been made for the type. */
6286 type_hash_marked_p (const void *p
)
6288 const_tree
const type
= ((const struct type_hash
*) p
)->type
;
6290 return ggc_marked_p (type
);
6294 print_type_hash_statistics (void)
6296 fprintf (stderr
, "Type hash: size %ld, %ld elements, %f collisions\n",
6297 (long) htab_size (type_hash_table
),
6298 (long) htab_elements (type_hash_table
),
6299 htab_collisions (type_hash_table
));
6302 /* Compute a hash code for a list of attributes (chain of TREE_LIST nodes
6303 with names in the TREE_PURPOSE slots and args in the TREE_VALUE slots),
6304 by adding the hash codes of the individual attributes. */
6307 attribute_hash_list (const_tree list
, hashval_t hashcode
)
6311 for (tail
= list
; tail
; tail
= TREE_CHAIN (tail
))
6312 /* ??? Do we want to add in TREE_VALUE too? */
6313 hashcode
= iterative_hash_object
6314 (IDENTIFIER_HASH_VALUE (TREE_PURPOSE (tail
)), hashcode
);
6318 /* Given two lists of attributes, return true if list l2 is
6319 equivalent to l1. */
6322 attribute_list_equal (const_tree l1
, const_tree l2
)
6327 return attribute_list_contained (l1
, l2
)
6328 && attribute_list_contained (l2
, l1
);
6331 /* Given two lists of attributes, return true if list L2 is
6332 completely contained within L1. */
6333 /* ??? This would be faster if attribute names were stored in a canonicalized
6334 form. Otherwise, if L1 uses `foo' and L2 uses `__foo__', the long method
6335 must be used to show these elements are equivalent (which they are). */
6336 /* ??? It's not clear that attributes with arguments will always be handled
6340 attribute_list_contained (const_tree l1
, const_tree l2
)
6344 /* First check the obvious, maybe the lists are identical. */
6348 /* Maybe the lists are similar. */
6349 for (t1
= l1
, t2
= l2
;
6351 && TREE_PURPOSE (t1
) == TREE_PURPOSE (t2
)
6352 && TREE_VALUE (t1
) == TREE_VALUE (t2
);
6353 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
6356 /* Maybe the lists are equal. */
6357 if (t1
== 0 && t2
== 0)
6360 for (; t2
!= 0; t2
= TREE_CHAIN (t2
))
6363 /* This CONST_CAST is okay because lookup_attribute does not
6364 modify its argument and the return value is assigned to a
6366 for (attr
= lookup_ident_attribute (TREE_PURPOSE (t2
), CONST_CAST_TREE(l1
));
6367 attr
!= NULL_TREE
&& !attribute_value_equal (t2
, attr
);
6368 attr
= lookup_ident_attribute (TREE_PURPOSE (t2
), TREE_CHAIN (attr
)))
6371 if (attr
== NULL_TREE
)
6378 /* Given two lists of types
6379 (chains of TREE_LIST nodes with types in the TREE_VALUE slots)
6380 return 1 if the lists contain the same types in the same order.
6381 Also, the TREE_PURPOSEs must match. */
6384 type_list_equal (const_tree l1
, const_tree l2
)
6388 for (t1
= l1
, t2
= l2
; t1
&& t2
; t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
6389 if (TREE_VALUE (t1
) != TREE_VALUE (t2
)
6390 || (TREE_PURPOSE (t1
) != TREE_PURPOSE (t2
)
6391 && ! (1 == simple_cst_equal (TREE_PURPOSE (t1
), TREE_PURPOSE (t2
))
6392 && (TREE_TYPE (TREE_PURPOSE (t1
))
6393 == TREE_TYPE (TREE_PURPOSE (t2
))))))
6399 /* Returns the number of arguments to the FUNCTION_TYPE or METHOD_TYPE
6400 given by TYPE. If the argument list accepts variable arguments,
6401 then this function counts only the ordinary arguments. */
6404 type_num_arguments (const_tree type
)
6409 for (t
= TYPE_ARG_TYPES (type
); t
; t
= TREE_CHAIN (t
))
6410 /* If the function does not take a variable number of arguments,
6411 the last element in the list will have type `void'. */
6412 if (VOID_TYPE_P (TREE_VALUE (t
)))
6420 /* Nonzero if integer constants T1 and T2
6421 represent the same constant value. */
6424 tree_int_cst_equal (const_tree t1
, const_tree t2
)
6429 if (t1
== 0 || t2
== 0)
6432 if (TREE_CODE (t1
) == INTEGER_CST
6433 && TREE_CODE (t2
) == INTEGER_CST
6434 && TREE_INT_CST_LOW (t1
) == TREE_INT_CST_LOW (t2
)
6435 && TREE_INT_CST_HIGH (t1
) == TREE_INT_CST_HIGH (t2
))
6441 /* Nonzero if integer constants T1 and T2 represent values that satisfy <.
6442 The precise way of comparison depends on their data type. */
6445 tree_int_cst_lt (const_tree t1
, const_tree t2
)
6450 if (TYPE_UNSIGNED (TREE_TYPE (t1
)) != TYPE_UNSIGNED (TREE_TYPE (t2
)))
6452 int t1_sgn
= tree_int_cst_sgn (t1
);
6453 int t2_sgn
= tree_int_cst_sgn (t2
);
6455 if (t1_sgn
< t2_sgn
)
6457 else if (t1_sgn
> t2_sgn
)
6459 /* Otherwise, both are non-negative, so we compare them as
6460 unsigned just in case one of them would overflow a signed
6463 else if (!TYPE_UNSIGNED (TREE_TYPE (t1
)))
6464 return INT_CST_LT (t1
, t2
);
6466 return INT_CST_LT_UNSIGNED (t1
, t2
);
6469 /* Returns -1 if T1 < T2, 0 if T1 == T2, and 1 if T1 > T2. */
6472 tree_int_cst_compare (const_tree t1
, const_tree t2
)
6474 if (tree_int_cst_lt (t1
, t2
))
6476 else if (tree_int_cst_lt (t2
, t1
))
6482 /* Return 1 if T is an INTEGER_CST that can be manipulated efficiently on
6483 the host. If POS is zero, the value can be represented in a single
6484 HOST_WIDE_INT. If POS is nonzero, the value must be non-negative and can
6485 be represented in a single unsigned HOST_WIDE_INT. */
6488 host_integerp (const_tree t
, int pos
)
6493 return (TREE_CODE (t
) == INTEGER_CST
6494 && ((TREE_INT_CST_HIGH (t
) == 0
6495 && (HOST_WIDE_INT
) TREE_INT_CST_LOW (t
) >= 0)
6496 || (! pos
&& TREE_INT_CST_HIGH (t
) == -1
6497 && (HOST_WIDE_INT
) TREE_INT_CST_LOW (t
) < 0
6498 && (!TYPE_UNSIGNED (TREE_TYPE (t
))
6499 || (TREE_CODE (TREE_TYPE (t
)) == INTEGER_TYPE
6500 && TYPE_IS_SIZETYPE (TREE_TYPE (t
)))))
6501 || (pos
&& TREE_INT_CST_HIGH (t
) == 0)));
6504 /* Return the HOST_WIDE_INT least significant bits of T if it is an
6505 INTEGER_CST and there is no overflow. POS is nonzero if the result must
6506 be non-negative. We must be able to satisfy the above conditions. */
6509 tree_low_cst (const_tree t
, int pos
)
6511 gcc_assert (host_integerp (t
, pos
));
6512 return TREE_INT_CST_LOW (t
);
6515 /* Return the most significant bit of the integer constant T. */
6518 tree_int_cst_msb (const_tree t
)
6522 unsigned HOST_WIDE_INT l
;
6524 /* Note that using TYPE_PRECISION here is wrong. We care about the
6525 actual bits, not the (arbitrary) range of the type. */
6526 prec
= GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (t
))) - 1;
6527 rshift_double (TREE_INT_CST_LOW (t
), TREE_INT_CST_HIGH (t
), prec
,
6528 2 * HOST_BITS_PER_WIDE_INT
, &l
, &h
, 0);
6529 return (l
& 1) == 1;
6532 /* Return an indication of the sign of the integer constant T.
6533 The return value is -1 if T < 0, 0 if T == 0, and 1 if T > 0.
6534 Note that -1 will never be returned if T's type is unsigned. */
6537 tree_int_cst_sgn (const_tree t
)
6539 if (TREE_INT_CST_LOW (t
) == 0 && TREE_INT_CST_HIGH (t
) == 0)
6541 else if (TYPE_UNSIGNED (TREE_TYPE (t
)))
6543 else if (TREE_INT_CST_HIGH (t
) < 0)
6549 /* Return the minimum number of bits needed to represent VALUE in a
6550 signed or unsigned type, UNSIGNEDP says which. */
6553 tree_int_cst_min_precision (tree value
, bool unsignedp
)
6557 /* If the value is negative, compute its negative minus 1. The latter
6558 adjustment is because the absolute value of the largest negative value
6559 is one larger than the largest positive value. This is equivalent to
6560 a bit-wise negation, so use that operation instead. */
6562 if (tree_int_cst_sgn (value
) < 0)
6563 value
= fold_build1 (BIT_NOT_EXPR
, TREE_TYPE (value
), value
);
6565 /* Return the number of bits needed, taking into account the fact
6566 that we need one more bit for a signed than unsigned type. */
6568 if (integer_zerop (value
))
6571 log
= tree_floor_log2 (value
);
6573 return log
+ 1 + !unsignedp
;
6576 /* Compare two constructor-element-type constants. Return 1 if the lists
6577 are known to be equal; otherwise return 0. */
6580 simple_cst_list_equal (const_tree l1
, const_tree l2
)
6582 while (l1
!= NULL_TREE
&& l2
!= NULL_TREE
)
6584 if (simple_cst_equal (TREE_VALUE (l1
), TREE_VALUE (l2
)) != 1)
6587 l1
= TREE_CHAIN (l1
);
6588 l2
= TREE_CHAIN (l2
);
6594 /* Return truthvalue of whether T1 is the same tree structure as T2.
6595 Return 1 if they are the same.
6596 Return 0 if they are understandably different.
6597 Return -1 if either contains tree structure not understood by
6601 simple_cst_equal (const_tree t1
, const_tree t2
)
6603 enum tree_code code1
, code2
;
6609 if (t1
== 0 || t2
== 0)
6612 code1
= TREE_CODE (t1
);
6613 code2
= TREE_CODE (t2
);
6615 if (CONVERT_EXPR_CODE_P (code1
) || code1
== NON_LVALUE_EXPR
)
6617 if (CONVERT_EXPR_CODE_P (code2
)
6618 || code2
== NON_LVALUE_EXPR
)
6619 return simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
6621 return simple_cst_equal (TREE_OPERAND (t1
, 0), t2
);
6624 else if (CONVERT_EXPR_CODE_P (code2
)
6625 || code2
== NON_LVALUE_EXPR
)
6626 return simple_cst_equal (t1
, TREE_OPERAND (t2
, 0));
6634 return (TREE_INT_CST_LOW (t1
) == TREE_INT_CST_LOW (t2
)
6635 && TREE_INT_CST_HIGH (t1
) == TREE_INT_CST_HIGH (t2
));
6638 return REAL_VALUES_IDENTICAL (TREE_REAL_CST (t1
), TREE_REAL_CST (t2
));
6641 return FIXED_VALUES_IDENTICAL (TREE_FIXED_CST (t1
), TREE_FIXED_CST (t2
));
6644 return (TREE_STRING_LENGTH (t1
) == TREE_STRING_LENGTH (t2
)
6645 && ! memcmp (TREE_STRING_POINTER (t1
), TREE_STRING_POINTER (t2
),
6646 TREE_STRING_LENGTH (t1
)));
6650 unsigned HOST_WIDE_INT idx
;
6651 VEC(constructor_elt
, gc
) *v1
= CONSTRUCTOR_ELTS (t1
);
6652 VEC(constructor_elt
, gc
) *v2
= CONSTRUCTOR_ELTS (t2
);
6654 if (VEC_length (constructor_elt
, v1
) != VEC_length (constructor_elt
, v2
))
6657 for (idx
= 0; idx
< VEC_length (constructor_elt
, v1
); ++idx
)
6658 /* ??? Should we handle also fields here? */
6659 if (!simple_cst_equal (VEC_index (constructor_elt
, v1
, idx
)->value
,
6660 VEC_index (constructor_elt
, v2
, idx
)->value
))
6666 return simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
6669 cmp
= simple_cst_equal (CALL_EXPR_FN (t1
), CALL_EXPR_FN (t2
));
6672 if (call_expr_nargs (t1
) != call_expr_nargs (t2
))
6675 const_tree arg1
, arg2
;
6676 const_call_expr_arg_iterator iter1
, iter2
;
6677 for (arg1
= first_const_call_expr_arg (t1
, &iter1
),
6678 arg2
= first_const_call_expr_arg (t2
, &iter2
);
6680 arg1
= next_const_call_expr_arg (&iter1
),
6681 arg2
= next_const_call_expr_arg (&iter2
))
6683 cmp
= simple_cst_equal (arg1
, arg2
);
6687 return arg1
== arg2
;
6691 /* Special case: if either target is an unallocated VAR_DECL,
6692 it means that it's going to be unified with whatever the
6693 TARGET_EXPR is really supposed to initialize, so treat it
6694 as being equivalent to anything. */
6695 if ((TREE_CODE (TREE_OPERAND (t1
, 0)) == VAR_DECL
6696 && DECL_NAME (TREE_OPERAND (t1
, 0)) == NULL_TREE
6697 && !DECL_RTL_SET_P (TREE_OPERAND (t1
, 0)))
6698 || (TREE_CODE (TREE_OPERAND (t2
, 0)) == VAR_DECL
6699 && DECL_NAME (TREE_OPERAND (t2
, 0)) == NULL_TREE
6700 && !DECL_RTL_SET_P (TREE_OPERAND (t2
, 0))))
6703 cmp
= simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
6708 return simple_cst_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t2
, 1));
6710 case WITH_CLEANUP_EXPR
:
6711 cmp
= simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
6715 return simple_cst_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t1
, 1));
6718 if (TREE_OPERAND (t1
, 1) == TREE_OPERAND (t2
, 1))
6719 return simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
6733 /* This general rule works for most tree codes. All exceptions should be
6734 handled above. If this is a language-specific tree code, we can't
6735 trust what might be in the operand, so say we don't know
6737 if ((int) code1
>= (int) LAST_AND_UNUSED_TREE_CODE
)
6740 switch (TREE_CODE_CLASS (code1
))
6744 case tcc_comparison
:
6745 case tcc_expression
:
6749 for (i
= 0; i
< TREE_CODE_LENGTH (code1
); i
++)
6751 cmp
= simple_cst_equal (TREE_OPERAND (t1
, i
), TREE_OPERAND (t2
, i
));
6763 /* Compare the value of T, an INTEGER_CST, with U, an unsigned integer value.
6764 Return -1, 0, or 1 if the value of T is less than, equal to, or greater
6765 than U, respectively. */
6768 compare_tree_int (const_tree t
, unsigned HOST_WIDE_INT u
)
6770 if (tree_int_cst_sgn (t
) < 0)
6772 else if (TREE_INT_CST_HIGH (t
) != 0)
6774 else if (TREE_INT_CST_LOW (t
) == u
)
6776 else if (TREE_INT_CST_LOW (t
) < u
)
6782 /* Return true if CODE represents an associative tree code. Otherwise
6785 associative_tree_code (enum tree_code code
)
6804 /* Return true if CODE represents a commutative tree code. Otherwise
6807 commutative_tree_code (enum tree_code code
)
6820 case UNORDERED_EXPR
:
6824 case TRUTH_AND_EXPR
:
6825 case TRUTH_XOR_EXPR
:
6835 /* Return true if CODE represents a ternary tree code for which the
6836 first two operands are commutative. Otherwise return false. */
6838 commutative_ternary_tree_code (enum tree_code code
)
6842 case WIDEN_MULT_PLUS_EXPR
:
6843 case WIDEN_MULT_MINUS_EXPR
:
6852 /* Generate a hash value for an expression. This can be used iteratively
6853 by passing a previous result as the VAL argument.
6855 This function is intended to produce the same hash for expressions which
6856 would compare equal using operand_equal_p. */
6859 iterative_hash_expr (const_tree t
, hashval_t val
)
6862 enum tree_code code
;
6866 return iterative_hash_hashval_t (0, val
);
6868 code
= TREE_CODE (t
);
6872 /* Alas, constants aren't shared, so we can't rely on pointer
6875 val
= iterative_hash_host_wide_int (TREE_INT_CST_LOW (t
), val
);
6876 return iterative_hash_host_wide_int (TREE_INT_CST_HIGH (t
), val
);
6879 unsigned int val2
= real_hash (TREE_REAL_CST_PTR (t
));
6881 return iterative_hash_hashval_t (val2
, val
);
6885 unsigned int val2
= fixed_hash (TREE_FIXED_CST_PTR (t
));
6887 return iterative_hash_hashval_t (val2
, val
);
6890 return iterative_hash (TREE_STRING_POINTER (t
),
6891 TREE_STRING_LENGTH (t
), val
);
6893 val
= iterative_hash_expr (TREE_REALPART (t
), val
);
6894 return iterative_hash_expr (TREE_IMAGPART (t
), val
);
6896 return iterative_hash_expr (TREE_VECTOR_CST_ELTS (t
), val
);
6898 /* We can just compare by pointer. */
6899 return iterative_hash_host_wide_int (SSA_NAME_VERSION (t
), val
);
6900 case PLACEHOLDER_EXPR
:
6901 /* The node itself doesn't matter. */
6904 /* A list of expressions, for a CALL_EXPR or as the elements of a
6906 for (; t
; t
= TREE_CHAIN (t
))
6907 val
= iterative_hash_expr (TREE_VALUE (t
), val
);
6911 unsigned HOST_WIDE_INT idx
;
6913 FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (t
), idx
, field
, value
)
6915 val
= iterative_hash_expr (field
, val
);
6916 val
= iterative_hash_expr (value
, val
);
6922 /* The type of the second operand is relevant, except for
6923 its top-level qualifiers. */
6924 tree type
= TYPE_MAIN_VARIANT (TREE_TYPE (TREE_OPERAND (t
, 1)));
6926 val
= iterative_hash_object (TYPE_HASH (type
), val
);
6928 /* We could use the standard hash computation from this point
6930 val
= iterative_hash_object (code
, val
);
6931 val
= iterative_hash_expr (TREE_OPERAND (t
, 1), val
);
6932 val
= iterative_hash_expr (TREE_OPERAND (t
, 0), val
);
6936 /* When referring to a built-in FUNCTION_DECL, use the __builtin__ form.
6937 Otherwise nodes that compare equal according to operand_equal_p might
6938 get different hash codes. However, don't do this for machine specific
6939 or front end builtins, since the function code is overloaded in those
6941 if (DECL_BUILT_IN_CLASS (t
) == BUILT_IN_NORMAL
6942 && built_in_decls
[DECL_FUNCTION_CODE (t
)])
6944 t
= built_in_decls
[DECL_FUNCTION_CODE (t
)];
6945 code
= TREE_CODE (t
);
6949 tclass
= TREE_CODE_CLASS (code
);
6951 if (tclass
== tcc_declaration
)
6953 /* DECL's have a unique ID */
6954 val
= iterative_hash_host_wide_int (DECL_UID (t
), val
);
6958 gcc_assert (IS_EXPR_CODE_CLASS (tclass
));
6960 val
= iterative_hash_object (code
, val
);
6962 /* Don't hash the type, that can lead to having nodes which
6963 compare equal according to operand_equal_p, but which
6964 have different hash codes. */
6965 if (CONVERT_EXPR_CODE_P (code
)
6966 || code
== NON_LVALUE_EXPR
)
6968 /* Make sure to include signness in the hash computation. */
6969 val
+= TYPE_UNSIGNED (TREE_TYPE (t
));
6970 val
= iterative_hash_expr (TREE_OPERAND (t
, 0), val
);
6973 else if (commutative_tree_code (code
))
6975 /* It's a commutative expression. We want to hash it the same
6976 however it appears. We do this by first hashing both operands
6977 and then rehashing based on the order of their independent
6979 hashval_t one
= iterative_hash_expr (TREE_OPERAND (t
, 0), 0);
6980 hashval_t two
= iterative_hash_expr (TREE_OPERAND (t
, 1), 0);
6984 t
= one
, one
= two
, two
= t
;
6986 val
= iterative_hash_hashval_t (one
, val
);
6987 val
= iterative_hash_hashval_t (two
, val
);
6990 for (i
= TREE_OPERAND_LENGTH (t
) - 1; i
>= 0; --i
)
6991 val
= iterative_hash_expr (TREE_OPERAND (t
, i
), val
);
6998 /* Generate a hash value for a pair of expressions. This can be used
6999 iteratively by passing a previous result as the VAL argument.
7001 The same hash value is always returned for a given pair of expressions,
7002 regardless of the order in which they are presented. This is useful in
7003 hashing the operands of commutative functions. */
7006 iterative_hash_exprs_commutative (const_tree t1
,
7007 const_tree t2
, hashval_t val
)
7009 hashval_t one
= iterative_hash_expr (t1
, 0);
7010 hashval_t two
= iterative_hash_expr (t2
, 0);
7014 t
= one
, one
= two
, two
= t
;
7015 val
= iterative_hash_hashval_t (one
, val
);
7016 val
= iterative_hash_hashval_t (two
, val
);
7021 /* Constructors for pointer, array and function types.
7022 (RECORD_TYPE, UNION_TYPE and ENUMERAL_TYPE nodes are
7023 constructed by language-dependent code, not here.) */
7025 /* Construct, lay out and return the type of pointers to TO_TYPE with
7026 mode MODE. If CAN_ALIAS_ALL is TRUE, indicate this type can
7027 reference all of memory. If such a type has already been
7028 constructed, reuse it. */
7031 build_pointer_type_for_mode (tree to_type
, enum machine_mode mode
,
7036 if (to_type
== error_mark_node
)
7037 return error_mark_node
;
7039 /* If the pointed-to type has the may_alias attribute set, force
7040 a TYPE_REF_CAN_ALIAS_ALL pointer to be generated. */
7041 if (lookup_attribute ("may_alias", TYPE_ATTRIBUTES (to_type
)))
7042 can_alias_all
= true;
7044 /* In some cases, languages will have things that aren't a POINTER_TYPE
7045 (such as a RECORD_TYPE for fat pointers in Ada) as TYPE_POINTER_TO.
7046 In that case, return that type without regard to the rest of our
7049 ??? This is a kludge, but consistent with the way this function has
7050 always operated and there doesn't seem to be a good way to avoid this
7052 if (TYPE_POINTER_TO (to_type
) != 0
7053 && TREE_CODE (TYPE_POINTER_TO (to_type
)) != POINTER_TYPE
)
7054 return TYPE_POINTER_TO (to_type
);
7056 /* First, if we already have a type for pointers to TO_TYPE and it's
7057 the proper mode, use it. */
7058 for (t
= TYPE_POINTER_TO (to_type
); t
; t
= TYPE_NEXT_PTR_TO (t
))
7059 if (TYPE_MODE (t
) == mode
&& TYPE_REF_CAN_ALIAS_ALL (t
) == can_alias_all
)
7062 t
= make_node (POINTER_TYPE
);
7064 TREE_TYPE (t
) = to_type
;
7065 SET_TYPE_MODE (t
, mode
);
7066 TYPE_REF_CAN_ALIAS_ALL (t
) = can_alias_all
;
7067 TYPE_NEXT_PTR_TO (t
) = TYPE_POINTER_TO (to_type
);
7068 TYPE_POINTER_TO (to_type
) = t
;
7070 if (TYPE_STRUCTURAL_EQUALITY_P (to_type
))
7071 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7072 else if (TYPE_CANONICAL (to_type
) != to_type
)
7074 = build_pointer_type_for_mode (TYPE_CANONICAL (to_type
),
7075 mode
, can_alias_all
);
7077 /* Lay out the type. This function has many callers that are concerned
7078 with expression-construction, and this simplifies them all. */
7084 /* By default build pointers in ptr_mode. */
7087 build_pointer_type (tree to_type
)
7089 addr_space_t as
= to_type
== error_mark_node
? ADDR_SPACE_GENERIC
7090 : TYPE_ADDR_SPACE (to_type
);
7091 enum machine_mode pointer_mode
= targetm
.addr_space
.pointer_mode (as
);
7092 return build_pointer_type_for_mode (to_type
, pointer_mode
, false);
7095 /* Same as build_pointer_type_for_mode, but for REFERENCE_TYPE. */
7098 build_reference_type_for_mode (tree to_type
, enum machine_mode mode
,
7103 if (to_type
== error_mark_node
)
7104 return error_mark_node
;
7106 /* If the pointed-to type has the may_alias attribute set, force
7107 a TYPE_REF_CAN_ALIAS_ALL pointer to be generated. */
7108 if (lookup_attribute ("may_alias", TYPE_ATTRIBUTES (to_type
)))
7109 can_alias_all
= true;
7111 /* In some cases, languages will have things that aren't a REFERENCE_TYPE
7112 (such as a RECORD_TYPE for fat pointers in Ada) as TYPE_REFERENCE_TO.
7113 In that case, return that type without regard to the rest of our
7116 ??? This is a kludge, but consistent with the way this function has
7117 always operated and there doesn't seem to be a good way to avoid this
7119 if (TYPE_REFERENCE_TO (to_type
) != 0
7120 && TREE_CODE (TYPE_REFERENCE_TO (to_type
)) != REFERENCE_TYPE
)
7121 return TYPE_REFERENCE_TO (to_type
);
7123 /* First, if we already have a type for pointers to TO_TYPE and it's
7124 the proper mode, use it. */
7125 for (t
= TYPE_REFERENCE_TO (to_type
); t
; t
= TYPE_NEXT_REF_TO (t
))
7126 if (TYPE_MODE (t
) == mode
&& TYPE_REF_CAN_ALIAS_ALL (t
) == can_alias_all
)
7129 t
= make_node (REFERENCE_TYPE
);
7131 TREE_TYPE (t
) = to_type
;
7132 SET_TYPE_MODE (t
, mode
);
7133 TYPE_REF_CAN_ALIAS_ALL (t
) = can_alias_all
;
7134 TYPE_NEXT_REF_TO (t
) = TYPE_REFERENCE_TO (to_type
);
7135 TYPE_REFERENCE_TO (to_type
) = t
;
7137 if (TYPE_STRUCTURAL_EQUALITY_P (to_type
))
7138 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7139 else if (TYPE_CANONICAL (to_type
) != to_type
)
7141 = build_reference_type_for_mode (TYPE_CANONICAL (to_type
),
7142 mode
, can_alias_all
);
7150 /* Build the node for the type of references-to-TO_TYPE by default
7154 build_reference_type (tree to_type
)
7156 addr_space_t as
= to_type
== error_mark_node
? ADDR_SPACE_GENERIC
7157 : TYPE_ADDR_SPACE (to_type
);
7158 enum machine_mode pointer_mode
= targetm
.addr_space
.pointer_mode (as
);
7159 return build_reference_type_for_mode (to_type
, pointer_mode
, false);
7162 /* Build a type that is compatible with t but has no cv quals anywhere
7165 const char *const *const * -> char ***. */
7168 build_type_no_quals (tree t
)
7170 switch (TREE_CODE (t
))
7173 return build_pointer_type_for_mode (build_type_no_quals (TREE_TYPE (t
)),
7175 TYPE_REF_CAN_ALIAS_ALL (t
));
7176 case REFERENCE_TYPE
:
7178 build_reference_type_for_mode (build_type_no_quals (TREE_TYPE (t
)),
7180 TYPE_REF_CAN_ALIAS_ALL (t
));
7182 return TYPE_MAIN_VARIANT (t
);
7186 #define MAX_INT_CACHED_PREC \
7187 (HOST_BITS_PER_WIDE_INT > 64 ? HOST_BITS_PER_WIDE_INT : 64)
7188 static GTY(()) tree nonstandard_integer_type_cache
[2 * MAX_INT_CACHED_PREC
+ 2];
7190 /* Builds a signed or unsigned integer type of precision PRECISION.
7191 Used for C bitfields whose precision does not match that of
7192 built-in target types. */
7194 build_nonstandard_integer_type (unsigned HOST_WIDE_INT precision
,
7200 unsignedp
= MAX_INT_CACHED_PREC
+ 1;
7202 if (precision
<= MAX_INT_CACHED_PREC
)
7204 itype
= nonstandard_integer_type_cache
[precision
+ unsignedp
];
7209 itype
= make_node (INTEGER_TYPE
);
7210 TYPE_PRECISION (itype
) = precision
;
7213 fixup_unsigned_type (itype
);
7215 fixup_signed_type (itype
);
7218 if (host_integerp (TYPE_MAX_VALUE (itype
), 1))
7219 ret
= type_hash_canon (tree_low_cst (TYPE_MAX_VALUE (itype
), 1), itype
);
7220 if (precision
<= MAX_INT_CACHED_PREC
)
7221 nonstandard_integer_type_cache
[precision
+ unsignedp
] = ret
;
7226 /* Create a range of some discrete type TYPE (an INTEGER_TYPE, ENUMERAL_TYPE
7227 or BOOLEAN_TYPE) with low bound LOWVAL and high bound HIGHVAL. If SHARED
7228 is true, reuse such a type that has already been constructed. */
7231 build_range_type_1 (tree type
, tree lowval
, tree highval
, bool shared
)
7233 tree itype
= make_node (INTEGER_TYPE
);
7234 hashval_t hashcode
= 0;
7236 TREE_TYPE (itype
) = type
;
7238 TYPE_MIN_VALUE (itype
) = fold_convert (type
, lowval
);
7239 TYPE_MAX_VALUE (itype
) = highval
? fold_convert (type
, highval
) : NULL
;
7241 TYPE_PRECISION (itype
) = TYPE_PRECISION (type
);
7242 SET_TYPE_MODE (itype
, TYPE_MODE (type
));
7243 TYPE_SIZE (itype
) = TYPE_SIZE (type
);
7244 TYPE_SIZE_UNIT (itype
) = TYPE_SIZE_UNIT (type
);
7245 TYPE_ALIGN (itype
) = TYPE_ALIGN (type
);
7246 TYPE_USER_ALIGN (itype
) = TYPE_USER_ALIGN (type
);
7251 if ((TYPE_MIN_VALUE (itype
)
7252 && TREE_CODE (TYPE_MIN_VALUE (itype
)) != INTEGER_CST
)
7253 || (TYPE_MAX_VALUE (itype
)
7254 && TREE_CODE (TYPE_MAX_VALUE (itype
)) != INTEGER_CST
))
7256 /* Since we cannot reliably merge this type, we need to compare it using
7257 structural equality checks. */
7258 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
7262 hashcode
= iterative_hash_expr (TYPE_MIN_VALUE (itype
), hashcode
);
7263 hashcode
= iterative_hash_expr (TYPE_MAX_VALUE (itype
), hashcode
);
7264 hashcode
= iterative_hash_hashval_t (TYPE_HASH (type
), hashcode
);
7265 itype
= type_hash_canon (hashcode
, itype
);
7270 /* Wrapper around build_range_type_1 with SHARED set to true. */
7273 build_range_type (tree type
, tree lowval
, tree highval
)
7275 return build_range_type_1 (type
, lowval
, highval
, true);
7278 /* Wrapper around build_range_type_1 with SHARED set to false. */
7281 build_nonshared_range_type (tree type
, tree lowval
, tree highval
)
7283 return build_range_type_1 (type
, lowval
, highval
, false);
7286 /* Create a type of integers to be the TYPE_DOMAIN of an ARRAY_TYPE.
7287 MAXVAL should be the maximum value in the domain
7288 (one less than the length of the array).
7290 The maximum value that MAXVAL can have is INT_MAX for a HOST_WIDE_INT.
7291 We don't enforce this limit, that is up to caller (e.g. language front end).
7292 The limit exists because the result is a signed type and we don't handle
7293 sizes that use more than one HOST_WIDE_INT. */
7296 build_index_type (tree maxval
)
7298 return build_range_type (sizetype
, size_zero_node
, maxval
);
7301 /* Return true if the debug information for TYPE, a subtype, should be emitted
7302 as a subrange type. If so, set LOWVAL to the low bound and HIGHVAL to the
7303 high bound, respectively. Sometimes doing so unnecessarily obfuscates the
7304 debug info and doesn't reflect the source code. */
7307 subrange_type_for_debug_p (const_tree type
, tree
*lowval
, tree
*highval
)
7309 tree base_type
= TREE_TYPE (type
), low
, high
;
7311 /* Subrange types have a base type which is an integral type. */
7312 if (!INTEGRAL_TYPE_P (base_type
))
7315 /* Get the real bounds of the subtype. */
7316 if (lang_hooks
.types
.get_subrange_bounds
)
7317 lang_hooks
.types
.get_subrange_bounds (type
, &low
, &high
);
7320 low
= TYPE_MIN_VALUE (type
);
7321 high
= TYPE_MAX_VALUE (type
);
7324 /* If the type and its base type have the same representation and the same
7325 name, then the type is not a subrange but a copy of the base type. */
7326 if ((TREE_CODE (base_type
) == INTEGER_TYPE
7327 || TREE_CODE (base_type
) == BOOLEAN_TYPE
)
7328 && int_size_in_bytes (type
) == int_size_in_bytes (base_type
)
7329 && tree_int_cst_equal (low
, TYPE_MIN_VALUE (base_type
))
7330 && tree_int_cst_equal (high
, TYPE_MAX_VALUE (base_type
)))
7332 tree type_name
= TYPE_NAME (type
);
7333 tree base_type_name
= TYPE_NAME (base_type
);
7335 if (type_name
&& TREE_CODE (type_name
) == TYPE_DECL
)
7336 type_name
= DECL_NAME (type_name
);
7338 if (base_type_name
&& TREE_CODE (base_type_name
) == TYPE_DECL
)
7339 base_type_name
= DECL_NAME (base_type_name
);
7341 if (type_name
== base_type_name
)
7352 /* Construct, lay out and return the type of arrays of elements with ELT_TYPE
7353 and number of elements specified by the range of values of INDEX_TYPE.
7354 If SHARED is true, reuse such a type that has already been constructed. */
7357 build_array_type_1 (tree elt_type
, tree index_type
, bool shared
)
7361 if (TREE_CODE (elt_type
) == FUNCTION_TYPE
)
7363 error ("arrays of functions are not meaningful");
7364 elt_type
= integer_type_node
;
7367 t
= make_node (ARRAY_TYPE
);
7368 TREE_TYPE (t
) = elt_type
;
7369 TYPE_DOMAIN (t
) = index_type
;
7370 TYPE_ADDR_SPACE (t
) = TYPE_ADDR_SPACE (elt_type
);
7373 /* If the element type is incomplete at this point we get marked for
7374 structural equality. Do not record these types in the canonical
7376 if (TYPE_STRUCTURAL_EQUALITY_P (t
))
7381 hashval_t hashcode
= iterative_hash_object (TYPE_HASH (elt_type
), 0);
7383 hashcode
= iterative_hash_object (TYPE_HASH (index_type
), hashcode
);
7384 t
= type_hash_canon (hashcode
, t
);
7387 if (TYPE_CANONICAL (t
) == t
)
7389 if (TYPE_STRUCTURAL_EQUALITY_P (elt_type
)
7390 || (index_type
&& TYPE_STRUCTURAL_EQUALITY_P (index_type
)))
7391 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7392 else if (TYPE_CANONICAL (elt_type
) != elt_type
7393 || (index_type
&& TYPE_CANONICAL (index_type
) != index_type
))
7395 = build_array_type_1 (TYPE_CANONICAL (elt_type
),
7397 ? TYPE_CANONICAL (index_type
) : NULL_TREE
,
7404 /* Wrapper around build_array_type_1 with SHARED set to true. */
7407 build_array_type (tree elt_type
, tree index_type
)
7409 return build_array_type_1 (elt_type
, index_type
, true);
7412 /* Wrapper around build_array_type_1 with SHARED set to false. */
7415 build_nonshared_array_type (tree elt_type
, tree index_type
)
7417 return build_array_type_1 (elt_type
, index_type
, false);
7420 /* Return a representation of ELT_TYPE[NELTS], using indices of type
7424 build_array_type_nelts (tree elt_type
, unsigned HOST_WIDE_INT nelts
)
7426 return build_array_type (elt_type
, build_index_type (size_int (nelts
- 1)));
7429 /* Recursively examines the array elements of TYPE, until a non-array
7430 element type is found. */
7433 strip_array_types (tree type
)
7435 while (TREE_CODE (type
) == ARRAY_TYPE
)
7436 type
= TREE_TYPE (type
);
7441 /* Computes the canonical argument types from the argument type list
7444 Upon return, *ANY_STRUCTURAL_P will be true iff either it was true
7445 on entry to this function, or if any of the ARGTYPES are
7448 Upon return, *ANY_NONCANONICAL_P will be true iff either it was
7449 true on entry to this function, or if any of the ARGTYPES are
7452 Returns a canonical argument list, which may be ARGTYPES when the
7453 canonical argument list is unneeded (i.e., *ANY_STRUCTURAL_P is
7454 true) or would not differ from ARGTYPES. */
7457 maybe_canonicalize_argtypes(tree argtypes
,
7458 bool *any_structural_p
,
7459 bool *any_noncanonical_p
)
7462 bool any_noncanonical_argtypes_p
= false;
7464 for (arg
= argtypes
; arg
&& !(*any_structural_p
); arg
= TREE_CHAIN (arg
))
7466 if (!TREE_VALUE (arg
) || TREE_VALUE (arg
) == error_mark_node
)
7467 /* Fail gracefully by stating that the type is structural. */
7468 *any_structural_p
= true;
7469 else if (TYPE_STRUCTURAL_EQUALITY_P (TREE_VALUE (arg
)))
7470 *any_structural_p
= true;
7471 else if (TYPE_CANONICAL (TREE_VALUE (arg
)) != TREE_VALUE (arg
)
7472 || TREE_PURPOSE (arg
))
7473 /* If the argument has a default argument, we consider it
7474 non-canonical even though the type itself is canonical.
7475 That way, different variants of function and method types
7476 with default arguments will all point to the variant with
7477 no defaults as their canonical type. */
7478 any_noncanonical_argtypes_p
= true;
7481 if (*any_structural_p
)
7484 if (any_noncanonical_argtypes_p
)
7486 /* Build the canonical list of argument types. */
7487 tree canon_argtypes
= NULL_TREE
;
7488 bool is_void
= false;
7490 for (arg
= argtypes
; arg
; arg
= TREE_CHAIN (arg
))
7492 if (arg
== void_list_node
)
7495 canon_argtypes
= tree_cons (NULL_TREE
,
7496 TYPE_CANONICAL (TREE_VALUE (arg
)),
7500 canon_argtypes
= nreverse (canon_argtypes
);
7502 canon_argtypes
= chainon (canon_argtypes
, void_list_node
);
7504 /* There is a non-canonical type. */
7505 *any_noncanonical_p
= true;
7506 return canon_argtypes
;
7509 /* The canonical argument types are the same as ARGTYPES. */
7513 /* Construct, lay out and return
7514 the type of functions returning type VALUE_TYPE
7515 given arguments of types ARG_TYPES.
7516 ARG_TYPES is a chain of TREE_LIST nodes whose TREE_VALUEs
7517 are data type nodes for the arguments of the function.
7518 If such a type has already been constructed, reuse it. */
7521 build_function_type (tree value_type
, tree arg_types
)
7524 hashval_t hashcode
= 0;
7525 bool any_structural_p
, any_noncanonical_p
;
7526 tree canon_argtypes
;
7528 if (TREE_CODE (value_type
) == FUNCTION_TYPE
)
7530 error ("function return type cannot be function");
7531 value_type
= integer_type_node
;
7534 /* Make a node of the sort we want. */
7535 t
= make_node (FUNCTION_TYPE
);
7536 TREE_TYPE (t
) = value_type
;
7537 TYPE_ARG_TYPES (t
) = arg_types
;
7539 /* If we already have such a type, use the old one. */
7540 hashcode
= iterative_hash_object (TYPE_HASH (value_type
), hashcode
);
7541 hashcode
= type_hash_list (arg_types
, hashcode
);
7542 t
= type_hash_canon (hashcode
, t
);
7544 /* Set up the canonical type. */
7545 any_structural_p
= TYPE_STRUCTURAL_EQUALITY_P (value_type
);
7546 any_noncanonical_p
= TYPE_CANONICAL (value_type
) != value_type
;
7547 canon_argtypes
= maybe_canonicalize_argtypes (arg_types
,
7549 &any_noncanonical_p
);
7550 if (any_structural_p
)
7551 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7552 else if (any_noncanonical_p
)
7553 TYPE_CANONICAL (t
) = build_function_type (TYPE_CANONICAL (value_type
),
7556 if (!COMPLETE_TYPE_P (t
))
7561 /* Build variant of function type ORIG_TYPE skipping ARGS_TO_SKIP. */
7564 build_function_type_skip_args (tree orig_type
, bitmap args_to_skip
)
7566 tree new_type
= NULL
;
7567 tree args
, new_args
= NULL
, t
;
7571 for (args
= TYPE_ARG_TYPES (orig_type
); args
&& args
!= void_list_node
;
7572 args
= TREE_CHAIN (args
), i
++)
7573 if (!bitmap_bit_p (args_to_skip
, i
))
7574 new_args
= tree_cons (NULL_TREE
, TREE_VALUE (args
), new_args
);
7576 new_reversed
= nreverse (new_args
);
7580 TREE_CHAIN (new_args
) = void_list_node
;
7582 new_reversed
= void_list_node
;
7585 /* Use copy_node to preserve as much as possible from original type
7586 (debug info, attribute lists etc.)
7587 Exception is METHOD_TYPEs must have THIS argument.
7588 When we are asked to remove it, we need to build new FUNCTION_TYPE
7590 if (TREE_CODE (orig_type
) != METHOD_TYPE
7591 || !bitmap_bit_p (args_to_skip
, 0))
7593 new_type
= build_distinct_type_copy (orig_type
);
7594 TYPE_ARG_TYPES (new_type
) = new_reversed
;
7599 = build_distinct_type_copy (build_function_type (TREE_TYPE (orig_type
),
7601 TYPE_CONTEXT (new_type
) = TYPE_CONTEXT (orig_type
);
7604 /* This is a new type, not a copy of an old type. Need to reassociate
7605 variants. We can handle everything except the main variant lazily. */
7606 t
= TYPE_MAIN_VARIANT (orig_type
);
7609 TYPE_MAIN_VARIANT (new_type
) = t
;
7610 TYPE_NEXT_VARIANT (new_type
) = TYPE_NEXT_VARIANT (t
);
7611 TYPE_NEXT_VARIANT (t
) = new_type
;
7615 TYPE_MAIN_VARIANT (new_type
) = new_type
;
7616 TYPE_NEXT_VARIANT (new_type
) = NULL
;
7621 /* Build variant of function type ORIG_TYPE skipping ARGS_TO_SKIP.
7623 Arguments from DECL_ARGUMENTS list can't be removed now, since they are
7624 linked by TREE_CHAIN directly. The caller is responsible for eliminating
7625 them when they are being duplicated (i.e. copy_arguments_for_versioning). */
7628 build_function_decl_skip_args (tree orig_decl
, bitmap args_to_skip
)
7630 tree new_decl
= copy_node (orig_decl
);
7633 new_type
= TREE_TYPE (orig_decl
);
7634 if (prototype_p (new_type
))
7635 new_type
= build_function_type_skip_args (new_type
, args_to_skip
);
7636 TREE_TYPE (new_decl
) = new_type
;
7638 /* For declarations setting DECL_VINDEX (i.e. methods)
7639 we expect first argument to be THIS pointer. */
7640 if (bitmap_bit_p (args_to_skip
, 0))
7641 DECL_VINDEX (new_decl
) = NULL_TREE
;
7643 /* When signature changes, we need to clear builtin info. */
7644 if (DECL_BUILT_IN (new_decl
) && !bitmap_empty_p (args_to_skip
))
7646 DECL_BUILT_IN_CLASS (new_decl
) = NOT_BUILT_IN
;
7647 DECL_FUNCTION_CODE (new_decl
) = (enum built_in_function
) 0;
7652 /* Build a function type. The RETURN_TYPE is the type returned by the
7653 function. If VAARGS is set, no void_type_node is appended to the
7654 the list. ARGP must be always be terminated be a NULL_TREE. */
7657 build_function_type_list_1 (bool vaargs
, tree return_type
, va_list argp
)
7661 t
= va_arg (argp
, tree
);
7662 for (args
= NULL_TREE
; t
!= NULL_TREE
; t
= va_arg (argp
, tree
))
7663 args
= tree_cons (NULL_TREE
, t
, args
);
7668 if (args
!= NULL_TREE
)
7669 args
= nreverse (args
);
7670 gcc_assert (last
!= void_list_node
);
7672 else if (args
== NULL_TREE
)
7673 args
= void_list_node
;
7677 args
= nreverse (args
);
7678 TREE_CHAIN (last
) = void_list_node
;
7680 args
= build_function_type (return_type
, args
);
7685 /* Build a function type. The RETURN_TYPE is the type returned by the
7686 function. If additional arguments are provided, they are
7687 additional argument types. The list of argument types must always
7688 be terminated by NULL_TREE. */
7691 build_function_type_list (tree return_type
, ...)
7696 va_start (p
, return_type
);
7697 args
= build_function_type_list_1 (false, return_type
, p
);
7702 /* Build a variable argument function type. The RETURN_TYPE is the
7703 type returned by the function. If additional arguments are provided,
7704 they are additional argument types. The list of argument types must
7705 always be terminated by NULL_TREE. */
7708 build_varargs_function_type_list (tree return_type
, ...)
7713 va_start (p
, return_type
);
7714 args
= build_function_type_list_1 (true, return_type
, p
);
7720 /* Build a function type. RETURN_TYPE is the type returned by the
7721 function; VAARGS indicates whether the function takes varargs. The
7722 function takes N named arguments, the types of which are provided in
7726 build_function_type_array_1 (bool vaargs
, tree return_type
, int n
,
7730 tree t
= vaargs
? NULL_TREE
: void_list_node
;
7732 for (i
= n
- 1; i
>= 0; i
--)
7733 t
= tree_cons (NULL_TREE
, arg_types
[i
], t
);
7735 return build_function_type (return_type
, t
);
7738 /* Build a function type. RETURN_TYPE is the type returned by the
7739 function. The function takes N named arguments, the types of which
7740 are provided in ARG_TYPES. */
7743 build_function_type_array (tree return_type
, int n
, tree
*arg_types
)
7745 return build_function_type_array_1 (false, return_type
, n
, arg_types
);
7748 /* Build a variable argument function type. RETURN_TYPE is the type
7749 returned by the function. The function takes N named arguments, the
7750 types of which are provided in ARG_TYPES. */
7753 build_varargs_function_type_array (tree return_type
, int n
, tree
*arg_types
)
7755 return build_function_type_array_1 (true, return_type
, n
, arg_types
);
7758 /* Build a METHOD_TYPE for a member of BASETYPE. The RETTYPE (a TYPE)
7759 and ARGTYPES (a TREE_LIST) are the return type and arguments types
7760 for the method. An implicit additional parameter (of type
7761 pointer-to-BASETYPE) is added to the ARGTYPES. */
7764 build_method_type_directly (tree basetype
,
7771 bool any_structural_p
, any_noncanonical_p
;
7772 tree canon_argtypes
;
7774 /* Make a node of the sort we want. */
7775 t
= make_node (METHOD_TYPE
);
7777 TYPE_METHOD_BASETYPE (t
) = TYPE_MAIN_VARIANT (basetype
);
7778 TREE_TYPE (t
) = rettype
;
7779 ptype
= build_pointer_type (basetype
);
7781 /* The actual arglist for this function includes a "hidden" argument
7782 which is "this". Put it into the list of argument types. */
7783 argtypes
= tree_cons (NULL_TREE
, ptype
, argtypes
);
7784 TYPE_ARG_TYPES (t
) = argtypes
;
7786 /* If we already have such a type, use the old one. */
7787 hashcode
= iterative_hash_object (TYPE_HASH (basetype
), hashcode
);
7788 hashcode
= iterative_hash_object (TYPE_HASH (rettype
), hashcode
);
7789 hashcode
= type_hash_list (argtypes
, hashcode
);
7790 t
= type_hash_canon (hashcode
, t
);
7792 /* Set up the canonical type. */
7794 = (TYPE_STRUCTURAL_EQUALITY_P (basetype
)
7795 || TYPE_STRUCTURAL_EQUALITY_P (rettype
));
7797 = (TYPE_CANONICAL (basetype
) != basetype
7798 || TYPE_CANONICAL (rettype
) != rettype
);
7799 canon_argtypes
= maybe_canonicalize_argtypes (TREE_CHAIN (argtypes
),
7801 &any_noncanonical_p
);
7802 if (any_structural_p
)
7803 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7804 else if (any_noncanonical_p
)
7806 = build_method_type_directly (TYPE_CANONICAL (basetype
),
7807 TYPE_CANONICAL (rettype
),
7809 if (!COMPLETE_TYPE_P (t
))
7815 /* Construct, lay out and return the type of methods belonging to class
7816 BASETYPE and whose arguments and values are described by TYPE.
7817 If that type exists already, reuse it.
7818 TYPE must be a FUNCTION_TYPE node. */
7821 build_method_type (tree basetype
, tree type
)
7823 gcc_assert (TREE_CODE (type
) == FUNCTION_TYPE
);
7825 return build_method_type_directly (basetype
,
7827 TYPE_ARG_TYPES (type
));
7830 /* Construct, lay out and return the type of offsets to a value
7831 of type TYPE, within an object of type BASETYPE.
7832 If a suitable offset type exists already, reuse it. */
7835 build_offset_type (tree basetype
, tree type
)
7838 hashval_t hashcode
= 0;
7840 /* Make a node of the sort we want. */
7841 t
= make_node (OFFSET_TYPE
);
7843 TYPE_OFFSET_BASETYPE (t
) = TYPE_MAIN_VARIANT (basetype
);
7844 TREE_TYPE (t
) = type
;
7846 /* If we already have such a type, use the old one. */
7847 hashcode
= iterative_hash_object (TYPE_HASH (basetype
), hashcode
);
7848 hashcode
= iterative_hash_object (TYPE_HASH (type
), hashcode
);
7849 t
= type_hash_canon (hashcode
, t
);
7851 if (!COMPLETE_TYPE_P (t
))
7854 if (TYPE_CANONICAL (t
) == t
)
7856 if (TYPE_STRUCTURAL_EQUALITY_P (basetype
)
7857 || TYPE_STRUCTURAL_EQUALITY_P (type
))
7858 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7859 else if (TYPE_CANONICAL (TYPE_MAIN_VARIANT (basetype
)) != basetype
7860 || TYPE_CANONICAL (type
) != type
)
7862 = build_offset_type (TYPE_CANONICAL (TYPE_MAIN_VARIANT (basetype
)),
7863 TYPE_CANONICAL (type
));
7869 /* Create a complex type whose components are COMPONENT_TYPE. */
7872 build_complex_type (tree component_type
)
7877 gcc_assert (INTEGRAL_TYPE_P (component_type
)
7878 || SCALAR_FLOAT_TYPE_P (component_type
)
7879 || FIXED_POINT_TYPE_P (component_type
));
7881 /* Make a node of the sort we want. */
7882 t
= make_node (COMPLEX_TYPE
);
7884 TREE_TYPE (t
) = TYPE_MAIN_VARIANT (component_type
);
7886 /* If we already have such a type, use the old one. */
7887 hashcode
= iterative_hash_object (TYPE_HASH (component_type
), 0);
7888 t
= type_hash_canon (hashcode
, t
);
7890 if (!COMPLETE_TYPE_P (t
))
7893 if (TYPE_CANONICAL (t
) == t
)
7895 if (TYPE_STRUCTURAL_EQUALITY_P (component_type
))
7896 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7897 else if (TYPE_CANONICAL (component_type
) != component_type
)
7899 = build_complex_type (TYPE_CANONICAL (component_type
));
7902 /* We need to create a name, since complex is a fundamental type. */
7903 if (! TYPE_NAME (t
))
7906 if (component_type
== char_type_node
)
7907 name
= "complex char";
7908 else if (component_type
== signed_char_type_node
)
7909 name
= "complex signed char";
7910 else if (component_type
== unsigned_char_type_node
)
7911 name
= "complex unsigned char";
7912 else if (component_type
== short_integer_type_node
)
7913 name
= "complex short int";
7914 else if (component_type
== short_unsigned_type_node
)
7915 name
= "complex short unsigned int";
7916 else if (component_type
== integer_type_node
)
7917 name
= "complex int";
7918 else if (component_type
== unsigned_type_node
)
7919 name
= "complex unsigned int";
7920 else if (component_type
== long_integer_type_node
)
7921 name
= "complex long int";
7922 else if (component_type
== long_unsigned_type_node
)
7923 name
= "complex long unsigned int";
7924 else if (component_type
== long_long_integer_type_node
)
7925 name
= "complex long long int";
7926 else if (component_type
== long_long_unsigned_type_node
)
7927 name
= "complex long long unsigned int";
7932 TYPE_NAME (t
) = build_decl (UNKNOWN_LOCATION
, TYPE_DECL
,
7933 get_identifier (name
), t
);
7936 return build_qualified_type (t
, TYPE_QUALS (component_type
));
7939 /* If TYPE is a real or complex floating-point type and the target
7940 does not directly support arithmetic on TYPE then return the wider
7941 type to be used for arithmetic on TYPE. Otherwise, return
7945 excess_precision_type (tree type
)
7947 if (flag_excess_precision
!= EXCESS_PRECISION_FAST
)
7949 int flt_eval_method
= TARGET_FLT_EVAL_METHOD
;
7950 switch (TREE_CODE (type
))
7953 switch (flt_eval_method
)
7956 if (TYPE_MODE (type
) == TYPE_MODE (float_type_node
))
7957 return double_type_node
;
7960 if (TYPE_MODE (type
) == TYPE_MODE (float_type_node
)
7961 || TYPE_MODE (type
) == TYPE_MODE (double_type_node
))
7962 return long_double_type_node
;
7969 if (TREE_CODE (TREE_TYPE (type
)) != REAL_TYPE
)
7971 switch (flt_eval_method
)
7974 if (TYPE_MODE (TREE_TYPE (type
)) == TYPE_MODE (float_type_node
))
7975 return complex_double_type_node
;
7978 if (TYPE_MODE (TREE_TYPE (type
)) == TYPE_MODE (float_type_node
)
7979 || (TYPE_MODE (TREE_TYPE (type
))
7980 == TYPE_MODE (double_type_node
)))
7981 return complex_long_double_type_node
;
7994 /* Return OP, stripped of any conversions to wider types as much as is safe.
7995 Converting the value back to OP's type makes a value equivalent to OP.
7997 If FOR_TYPE is nonzero, we return a value which, if converted to
7998 type FOR_TYPE, would be equivalent to converting OP to type FOR_TYPE.
8000 OP must have integer, real or enumeral type. Pointers are not allowed!
8002 There are some cases where the obvious value we could return
8003 would regenerate to OP if converted to OP's type,
8004 but would not extend like OP to wider types.
8005 If FOR_TYPE indicates such extension is contemplated, we eschew such values.
8006 For example, if OP is (unsigned short)(signed char)-1,
8007 we avoid returning (signed char)-1 if FOR_TYPE is int,
8008 even though extending that to an unsigned short would regenerate OP,
8009 since the result of extending (signed char)-1 to (int)
8010 is different from (int) OP. */
8013 get_unwidened (tree op
, tree for_type
)
8015 /* Set UNS initially if converting OP to FOR_TYPE is a zero-extension. */
8016 tree type
= TREE_TYPE (op
);
8018 = TYPE_PRECISION (for_type
!= 0 ? for_type
: type
);
8020 = (for_type
!= 0 && for_type
!= type
8021 && final_prec
> TYPE_PRECISION (type
)
8022 && TYPE_UNSIGNED (type
));
8025 while (CONVERT_EXPR_P (op
))
8029 /* TYPE_PRECISION on vector types has different meaning
8030 (TYPE_VECTOR_SUBPARTS) and casts from vectors are view conversions,
8031 so avoid them here. */
8032 if (TREE_CODE (TREE_TYPE (TREE_OPERAND (op
, 0))) == VECTOR_TYPE
)
8035 bitschange
= TYPE_PRECISION (TREE_TYPE (op
))
8036 - TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (op
, 0)));
8038 /* Truncations are many-one so cannot be removed.
8039 Unless we are later going to truncate down even farther. */
8041 && final_prec
> TYPE_PRECISION (TREE_TYPE (op
)))
8044 /* See what's inside this conversion. If we decide to strip it,
8046 op
= TREE_OPERAND (op
, 0);
8048 /* If we have not stripped any zero-extensions (uns is 0),
8049 we can strip any kind of extension.
8050 If we have previously stripped a zero-extension,
8051 only zero-extensions can safely be stripped.
8052 Any extension can be stripped if the bits it would produce
8053 are all going to be discarded later by truncating to FOR_TYPE. */
8057 if (! uns
|| final_prec
<= TYPE_PRECISION (TREE_TYPE (op
)))
8059 /* TYPE_UNSIGNED says whether this is a zero-extension.
8060 Let's avoid computing it if it does not affect WIN
8061 and if UNS will not be needed again. */
8063 || CONVERT_EXPR_P (op
))
8064 && TYPE_UNSIGNED (TREE_TYPE (op
)))
8072 /* If we finally reach a constant see if it fits in for_type and
8073 in that case convert it. */
8075 && TREE_CODE (win
) == INTEGER_CST
8076 && TREE_TYPE (win
) != for_type
8077 && int_fits_type_p (win
, for_type
))
8078 win
= fold_convert (for_type
, win
);
8083 /* Return OP or a simpler expression for a narrower value
8084 which can be sign-extended or zero-extended to give back OP.
8085 Store in *UNSIGNEDP_PTR either 1 if the value should be zero-extended
8086 or 0 if the value should be sign-extended. */
8089 get_narrower (tree op
, int *unsignedp_ptr
)
8094 bool integral_p
= INTEGRAL_TYPE_P (TREE_TYPE (op
));
8096 while (TREE_CODE (op
) == NOP_EXPR
)
8099 = (TYPE_PRECISION (TREE_TYPE (op
))
8100 - TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (op
, 0))));
8102 /* Truncations are many-one so cannot be removed. */
8106 /* See what's inside this conversion. If we decide to strip it,
8111 op
= TREE_OPERAND (op
, 0);
8112 /* An extension: the outermost one can be stripped,
8113 but remember whether it is zero or sign extension. */
8115 uns
= TYPE_UNSIGNED (TREE_TYPE (op
));
8116 /* Otherwise, if a sign extension has been stripped,
8117 only sign extensions can now be stripped;
8118 if a zero extension has been stripped, only zero-extensions. */
8119 else if (uns
!= TYPE_UNSIGNED (TREE_TYPE (op
)))
8123 else /* bitschange == 0 */
8125 /* A change in nominal type can always be stripped, but we must
8126 preserve the unsignedness. */
8128 uns
= TYPE_UNSIGNED (TREE_TYPE (op
));
8130 op
= TREE_OPERAND (op
, 0);
8131 /* Keep trying to narrow, but don't assign op to win if it
8132 would turn an integral type into something else. */
8133 if (INTEGRAL_TYPE_P (TREE_TYPE (op
)) != integral_p
)
8140 if (TREE_CODE (op
) == COMPONENT_REF
8141 /* Since type_for_size always gives an integer type. */
8142 && TREE_CODE (TREE_TYPE (op
)) != REAL_TYPE
8143 && TREE_CODE (TREE_TYPE (op
)) != FIXED_POINT_TYPE
8144 /* Ensure field is laid out already. */
8145 && DECL_SIZE (TREE_OPERAND (op
, 1)) != 0
8146 && host_integerp (DECL_SIZE (TREE_OPERAND (op
, 1)), 1))
8148 unsigned HOST_WIDE_INT innerprec
8149 = tree_low_cst (DECL_SIZE (TREE_OPERAND (op
, 1)), 1);
8150 int unsignedp
= (DECL_UNSIGNED (TREE_OPERAND (op
, 1))
8151 || TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (op
, 1))));
8152 tree type
= lang_hooks
.types
.type_for_size (innerprec
, unsignedp
);
8154 /* We can get this structure field in a narrower type that fits it,
8155 but the resulting extension to its nominal type (a fullword type)
8156 must satisfy the same conditions as for other extensions.
8158 Do this only for fields that are aligned (not bit-fields),
8159 because when bit-field insns will be used there is no
8160 advantage in doing this. */
8162 if (innerprec
< TYPE_PRECISION (TREE_TYPE (op
))
8163 && ! DECL_BIT_FIELD (TREE_OPERAND (op
, 1))
8164 && (first
|| uns
== DECL_UNSIGNED (TREE_OPERAND (op
, 1)))
8168 uns
= DECL_UNSIGNED (TREE_OPERAND (op
, 1));
8169 win
= fold_convert (type
, op
);
8173 *unsignedp_ptr
= uns
;
8177 /* Returns true if integer constant C has a value that is permissible
8178 for type TYPE (an INTEGER_TYPE). */
8181 int_fits_type_p (const_tree c
, const_tree type
)
8183 tree type_low_bound
, type_high_bound
;
8184 bool ok_for_low_bound
, ok_for_high_bound
, unsc
;
8187 dc
= tree_to_double_int (c
);
8188 unsc
= TYPE_UNSIGNED (TREE_TYPE (c
));
8190 if (TREE_CODE (TREE_TYPE (c
)) == INTEGER_TYPE
8191 && TYPE_IS_SIZETYPE (TREE_TYPE (c
))
8193 /* So c is an unsigned integer whose type is sizetype and type is not.
8194 sizetype'd integers are sign extended even though they are
8195 unsigned. If the integer value fits in the lower end word of c,
8196 and if the higher end word has all its bits set to 1, that
8197 means the higher end bits are set to 1 only for sign extension.
8198 So let's convert c into an equivalent zero extended unsigned
8200 dc
= double_int_zext (dc
, TYPE_PRECISION (TREE_TYPE (c
)));
8203 type_low_bound
= TYPE_MIN_VALUE (type
);
8204 type_high_bound
= TYPE_MAX_VALUE (type
);
8206 /* If at least one bound of the type is a constant integer, we can check
8207 ourselves and maybe make a decision. If no such decision is possible, but
8208 this type is a subtype, try checking against that. Otherwise, use
8209 double_int_fits_to_tree_p, which checks against the precision.
8211 Compute the status for each possibly constant bound, and return if we see
8212 one does not match. Use ok_for_xxx_bound for this purpose, assigning -1
8213 for "unknown if constant fits", 0 for "constant known *not* to fit" and 1
8214 for "constant known to fit". */
8216 /* Check if c >= type_low_bound. */
8217 if (type_low_bound
&& TREE_CODE (type_low_bound
) == INTEGER_CST
)
8219 dd
= tree_to_double_int (type_low_bound
);
8220 if (TREE_CODE (type
) == INTEGER_TYPE
8221 && TYPE_IS_SIZETYPE (type
)
8222 && TYPE_UNSIGNED (type
))
8223 dd
= double_int_zext (dd
, TYPE_PRECISION (type
));
8224 if (unsc
!= TYPE_UNSIGNED (TREE_TYPE (type_low_bound
)))
8226 int c_neg
= (!unsc
&& double_int_negative_p (dc
));
8227 int t_neg
= (unsc
&& double_int_negative_p (dd
));
8229 if (c_neg
&& !t_neg
)
8231 if ((c_neg
|| !t_neg
) && double_int_ucmp (dc
, dd
) < 0)
8234 else if (double_int_cmp (dc
, dd
, unsc
) < 0)
8236 ok_for_low_bound
= true;
8239 ok_for_low_bound
= false;
8241 /* Check if c <= type_high_bound. */
8242 if (type_high_bound
&& TREE_CODE (type_high_bound
) == INTEGER_CST
)
8244 dd
= tree_to_double_int (type_high_bound
);
8245 if (TREE_CODE (type
) == INTEGER_TYPE
8246 && TYPE_IS_SIZETYPE (type
)
8247 && TYPE_UNSIGNED (type
))
8248 dd
= double_int_zext (dd
, TYPE_PRECISION (type
));
8249 if (unsc
!= TYPE_UNSIGNED (TREE_TYPE (type_high_bound
)))
8251 int c_neg
= (!unsc
&& double_int_negative_p (dc
));
8252 int t_neg
= (unsc
&& double_int_negative_p (dd
));
8254 if (t_neg
&& !c_neg
)
8256 if ((t_neg
|| !c_neg
) && double_int_ucmp (dc
, dd
) > 0)
8259 else if (double_int_cmp (dc
, dd
, unsc
) > 0)
8261 ok_for_high_bound
= true;
8264 ok_for_high_bound
= false;
8266 /* If the constant fits both bounds, the result is known. */
8267 if (ok_for_low_bound
&& ok_for_high_bound
)
8270 /* Perform some generic filtering which may allow making a decision
8271 even if the bounds are not constant. First, negative integers
8272 never fit in unsigned types, */
8273 if (TYPE_UNSIGNED (type
) && !unsc
&& double_int_negative_p (dc
))
8276 /* Second, narrower types always fit in wider ones. */
8277 if (TYPE_PRECISION (type
) > TYPE_PRECISION (TREE_TYPE (c
)))
8280 /* Third, unsigned integers with top bit set never fit signed types. */
8281 if (! TYPE_UNSIGNED (type
) && unsc
)
8283 int prec
= GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (c
))) - 1;
8284 if (prec
< HOST_BITS_PER_WIDE_INT
)
8286 if (((((unsigned HOST_WIDE_INT
) 1) << prec
) & dc
.low
) != 0)
8289 else if (((((unsigned HOST_WIDE_INT
) 1)
8290 << (prec
- HOST_BITS_PER_WIDE_INT
)) & dc
.high
) != 0)
8294 /* If we haven't been able to decide at this point, there nothing more we
8295 can check ourselves here. Look at the base type if we have one and it
8296 has the same precision. */
8297 if (TREE_CODE (type
) == INTEGER_TYPE
8298 && TREE_TYPE (type
) != 0
8299 && TYPE_PRECISION (type
) == TYPE_PRECISION (TREE_TYPE (type
)))
8301 type
= TREE_TYPE (type
);
8305 /* Or to double_int_fits_to_tree_p, if nothing else. */
8306 return double_int_fits_to_tree_p (type
, dc
);
8309 /* Stores bounds of an integer TYPE in MIN and MAX. If TYPE has non-constant
8310 bounds or is a POINTER_TYPE, the maximum and/or minimum values that can be
8311 represented (assuming two's-complement arithmetic) within the bit
8312 precision of the type are returned instead. */
8315 get_type_static_bounds (const_tree type
, mpz_t min
, mpz_t max
)
8317 if (!POINTER_TYPE_P (type
) && TYPE_MIN_VALUE (type
)
8318 && TREE_CODE (TYPE_MIN_VALUE (type
)) == INTEGER_CST
)
8319 mpz_set_double_int (min
, tree_to_double_int (TYPE_MIN_VALUE (type
)),
8320 TYPE_UNSIGNED (type
));
8323 if (TYPE_UNSIGNED (type
))
8324 mpz_set_ui (min
, 0);
8328 mn
= double_int_mask (TYPE_PRECISION (type
) - 1);
8329 mn
= double_int_sext (double_int_add (mn
, double_int_one
),
8330 TYPE_PRECISION (type
));
8331 mpz_set_double_int (min
, mn
, false);
8335 if (!POINTER_TYPE_P (type
) && TYPE_MAX_VALUE (type
)
8336 && TREE_CODE (TYPE_MAX_VALUE (type
)) == INTEGER_CST
)
8337 mpz_set_double_int (max
, tree_to_double_int (TYPE_MAX_VALUE (type
)),
8338 TYPE_UNSIGNED (type
));
8341 if (TYPE_UNSIGNED (type
))
8342 mpz_set_double_int (max
, double_int_mask (TYPE_PRECISION (type
)),
8345 mpz_set_double_int (max
, double_int_mask (TYPE_PRECISION (type
) - 1),
8350 /* Return true if VAR is an automatic variable defined in function FN. */
8353 auto_var_in_fn_p (const_tree var
, const_tree fn
)
8355 return (DECL_P (var
) && DECL_CONTEXT (var
) == fn
8356 && ((((TREE_CODE (var
) == VAR_DECL
&& ! DECL_EXTERNAL (var
))
8357 || TREE_CODE (var
) == PARM_DECL
)
8358 && ! TREE_STATIC (var
))
8359 || TREE_CODE (var
) == LABEL_DECL
8360 || TREE_CODE (var
) == RESULT_DECL
));
8363 /* Subprogram of following function. Called by walk_tree.
8365 Return *TP if it is an automatic variable or parameter of the
8366 function passed in as DATA. */
8369 find_var_from_fn (tree
*tp
, int *walk_subtrees
, void *data
)
8371 tree fn
= (tree
) data
;
8376 else if (DECL_P (*tp
)
8377 && auto_var_in_fn_p (*tp
, fn
))
8383 /* Returns true if T is, contains, or refers to a type with variable
8384 size. For METHOD_TYPEs and FUNCTION_TYPEs we exclude the
8385 arguments, but not the return type. If FN is nonzero, only return
8386 true if a modifier of the type or position of FN is a variable or
8387 parameter inside FN.
8389 This concept is more general than that of C99 'variably modified types':
8390 in C99, a struct type is never variably modified because a VLA may not
8391 appear as a structure member. However, in GNU C code like:
8393 struct S { int i[f()]; };
8395 is valid, and other languages may define similar constructs. */
8398 variably_modified_type_p (tree type
, tree fn
)
8402 /* Test if T is either variable (if FN is zero) or an expression containing
8403 a variable in FN. */
8404 #define RETURN_TRUE_IF_VAR(T) \
8405 do { tree _t = (T); \
8406 if (_t && _t != error_mark_node && TREE_CODE (_t) != INTEGER_CST \
8407 && (!fn || walk_tree (&_t, find_var_from_fn, fn, NULL))) \
8408 return true; } while (0)
8410 if (type
== error_mark_node
)
8413 /* If TYPE itself has variable size, it is variably modified. */
8414 RETURN_TRUE_IF_VAR (TYPE_SIZE (type
));
8415 RETURN_TRUE_IF_VAR (TYPE_SIZE_UNIT (type
));
8417 switch (TREE_CODE (type
))
8420 case REFERENCE_TYPE
:
8422 if (variably_modified_type_p (TREE_TYPE (type
), fn
))
8428 /* If TYPE is a function type, it is variably modified if the
8429 return type is variably modified. */
8430 if (variably_modified_type_p (TREE_TYPE (type
), fn
))
8436 case FIXED_POINT_TYPE
:
8439 /* Scalar types are variably modified if their end points
8441 RETURN_TRUE_IF_VAR (TYPE_MIN_VALUE (type
));
8442 RETURN_TRUE_IF_VAR (TYPE_MAX_VALUE (type
));
8447 case QUAL_UNION_TYPE
:
8448 /* We can't see if any of the fields are variably-modified by the
8449 definition we normally use, since that would produce infinite
8450 recursion via pointers. */
8451 /* This is variably modified if some field's type is. */
8452 for (t
= TYPE_FIELDS (type
); t
; t
= DECL_CHAIN (t
))
8453 if (TREE_CODE (t
) == FIELD_DECL
)
8455 RETURN_TRUE_IF_VAR (DECL_FIELD_OFFSET (t
));
8456 RETURN_TRUE_IF_VAR (DECL_SIZE (t
));
8457 RETURN_TRUE_IF_VAR (DECL_SIZE_UNIT (t
));
8459 if (TREE_CODE (type
) == QUAL_UNION_TYPE
)
8460 RETURN_TRUE_IF_VAR (DECL_QUALIFIER (t
));
8465 /* Do not call ourselves to avoid infinite recursion. This is
8466 variably modified if the element type is. */
8467 RETURN_TRUE_IF_VAR (TYPE_SIZE (TREE_TYPE (type
)));
8468 RETURN_TRUE_IF_VAR (TYPE_SIZE_UNIT (TREE_TYPE (type
)));
8475 /* The current language may have other cases to check, but in general,
8476 all other types are not variably modified. */
8477 return lang_hooks
.tree_inlining
.var_mod_type_p (type
, fn
);
8479 #undef RETURN_TRUE_IF_VAR
8482 /* Given a DECL or TYPE, return the scope in which it was declared, or
8483 NULL_TREE if there is no containing scope. */
8486 get_containing_scope (const_tree t
)
8488 return (TYPE_P (t
) ? TYPE_CONTEXT (t
) : DECL_CONTEXT (t
));
8491 /* Return the innermost context enclosing DECL that is
8492 a FUNCTION_DECL, or zero if none. */
8495 decl_function_context (const_tree decl
)
8499 if (TREE_CODE (decl
) == ERROR_MARK
)
8502 /* C++ virtual functions use DECL_CONTEXT for the class of the vtable
8503 where we look up the function at runtime. Such functions always take
8504 a first argument of type 'pointer to real context'.
8506 C++ should really be fixed to use DECL_CONTEXT for the real context,
8507 and use something else for the "virtual context". */
8508 else if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_VINDEX (decl
))
8511 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl
)))));
8513 context
= DECL_CONTEXT (decl
);
8515 while (context
&& TREE_CODE (context
) != FUNCTION_DECL
)
8517 if (TREE_CODE (context
) == BLOCK
)
8518 context
= BLOCK_SUPERCONTEXT (context
);
8520 context
= get_containing_scope (context
);
8526 /* Return the innermost context enclosing DECL that is
8527 a RECORD_TYPE, UNION_TYPE or QUAL_UNION_TYPE, or zero if none.
8528 TYPE_DECLs and FUNCTION_DECLs are transparent to this function. */
8531 decl_type_context (const_tree decl
)
8533 tree context
= DECL_CONTEXT (decl
);
8536 switch (TREE_CODE (context
))
8538 case NAMESPACE_DECL
:
8539 case TRANSLATION_UNIT_DECL
:
8544 case QUAL_UNION_TYPE
:
8549 context
= DECL_CONTEXT (context
);
8553 context
= BLOCK_SUPERCONTEXT (context
);
8563 /* CALL is a CALL_EXPR. Return the declaration for the function
8564 called, or NULL_TREE if the called function cannot be
8568 get_callee_fndecl (const_tree call
)
8572 if (call
== error_mark_node
)
8573 return error_mark_node
;
8575 /* It's invalid to call this function with anything but a
8577 gcc_assert (TREE_CODE (call
) == CALL_EXPR
);
8579 /* The first operand to the CALL is the address of the function
8581 addr
= CALL_EXPR_FN (call
);
8585 /* If this is a readonly function pointer, extract its initial value. */
8586 if (DECL_P (addr
) && TREE_CODE (addr
) != FUNCTION_DECL
8587 && TREE_READONLY (addr
) && ! TREE_THIS_VOLATILE (addr
)
8588 && DECL_INITIAL (addr
))
8589 addr
= DECL_INITIAL (addr
);
8591 /* If the address is just `&f' for some function `f', then we know
8592 that `f' is being called. */
8593 if (TREE_CODE (addr
) == ADDR_EXPR
8594 && TREE_CODE (TREE_OPERAND (addr
, 0)) == FUNCTION_DECL
)
8595 return TREE_OPERAND (addr
, 0);
8597 /* We couldn't figure out what was being called. */
8601 /* Print debugging information about tree nodes generated during the compile,
8602 and any language-specific information. */
8605 dump_tree_statistics (void)
8607 #ifdef GATHER_STATISTICS
8609 int total_nodes
, total_bytes
;
8612 fprintf (stderr
, "\n??? tree nodes created\n\n");
8613 #ifdef GATHER_STATISTICS
8614 fprintf (stderr
, "Kind Nodes Bytes\n");
8615 fprintf (stderr
, "---------------------------------------\n");
8616 total_nodes
= total_bytes
= 0;
8617 for (i
= 0; i
< (int) all_kinds
; i
++)
8619 fprintf (stderr
, "%-20s %7d %10d\n", tree_node_kind_names
[i
],
8620 tree_node_counts
[i
], tree_node_sizes
[i
]);
8621 total_nodes
+= tree_node_counts
[i
];
8622 total_bytes
+= tree_node_sizes
[i
];
8624 fprintf (stderr
, "---------------------------------------\n");
8625 fprintf (stderr
, "%-20s %7d %10d\n", "Total", total_nodes
, total_bytes
);
8626 fprintf (stderr
, "---------------------------------------\n");
8627 fprintf (stderr
, "Code Nodes\n");
8628 fprintf (stderr
, "----------------------------\n");
8629 for (i
= 0; i
< (int) MAX_TREE_CODES
; i
++)
8630 fprintf (stderr
, "%-20s %7d\n", tree_code_name
[i
], tree_code_counts
[i
]);
8631 fprintf (stderr
, "----------------------------\n");
8632 ssanames_print_statistics ();
8633 phinodes_print_statistics ();
8635 fprintf (stderr
, "(No per-node statistics)\n");
8637 print_type_hash_statistics ();
8638 print_debug_expr_statistics ();
8639 print_value_expr_statistics ();
8640 lang_hooks
.print_statistics ();
8643 #define FILE_FUNCTION_FORMAT "_GLOBAL__%s_%s"
8645 /* Generate a crc32 of a byte. */
8648 crc32_byte (unsigned chksum
, char byte
)
8650 unsigned value
= (unsigned) byte
<< 24;
8653 for (ix
= 8; ix
--; value
<<= 1)
8657 feedback
= (value
^ chksum
) & 0x80000000 ? 0x04c11db7 : 0;
8665 /* Generate a crc32 of a string. */
8668 crc32_string (unsigned chksum
, const char *string
)
8672 chksum
= crc32_byte (chksum
, *string
);
8678 /* P is a string that will be used in a symbol. Mask out any characters
8679 that are not valid in that context. */
8682 clean_symbol_name (char *p
)
8686 #ifndef NO_DOLLAR_IN_LABEL /* this for `$'; unlikely, but... -- kr */
8689 #ifndef NO_DOT_IN_LABEL /* this for `.'; unlikely, but... */
8696 /* Generate a name for a special-purpose function.
8697 The generated name may need to be unique across the whole link.
8698 Changes to this function may also require corresponding changes to
8699 xstrdup_mask_random.
8700 TYPE is some string to identify the purpose of this function to the
8701 linker or collect2; it must start with an uppercase letter,
8703 I - for constructors
8705 N - for C++ anonymous namespaces
8706 F - for DWARF unwind frame information. */
8709 get_file_function_name (const char *type
)
8715 /* If we already have a name we know to be unique, just use that. */
8716 if (first_global_object_name
)
8717 p
= q
= ASTRDUP (first_global_object_name
);
8718 /* If the target is handling the constructors/destructors, they
8719 will be local to this file and the name is only necessary for
8721 We also assign sub_I and sub_D sufixes to constructors called from
8722 the global static constructors. These are always local. */
8723 else if (((type
[0] == 'I' || type
[0] == 'D') && targetm
.have_ctors_dtors
)
8724 || (strncmp (type
, "sub_", 4) == 0
8725 && (type
[4] == 'I' || type
[4] == 'D')))
8727 const char *file
= main_input_filename
;
8729 file
= input_filename
;
8730 /* Just use the file's basename, because the full pathname
8731 might be quite long. */
8732 p
= q
= ASTRDUP (lbasename (file
));
8736 /* Otherwise, the name must be unique across the entire link.
8737 We don't have anything that we know to be unique to this translation
8738 unit, so use what we do have and throw in some randomness. */
8740 const char *name
= weak_global_object_name
;
8741 const char *file
= main_input_filename
;
8746 file
= input_filename
;
8748 len
= strlen (file
);
8749 q
= (char *) alloca (9 * 2 + len
+ 1);
8750 memcpy (q
, file
, len
+ 1);
8752 sprintf (q
+ len
, "_%08X_%08X", crc32_string (0, name
),
8753 crc32_string (0, get_random_seed (false)));
8758 clean_symbol_name (q
);
8759 buf
= (char *) alloca (sizeof (FILE_FUNCTION_FORMAT
) + strlen (p
)
8762 /* Set up the name of the file-level functions we may need.
8763 Use a global object (which is already required to be unique over
8764 the program) rather than the file name (which imposes extra
8766 sprintf (buf
, FILE_FUNCTION_FORMAT
, type
, p
);
8768 return get_identifier (buf
);
8771 #if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007)
8773 /* Complain that the tree code of NODE does not match the expected 0
8774 terminated list of trailing codes. The trailing code list can be
8775 empty, for a more vague error message. FILE, LINE, and FUNCTION
8776 are of the caller. */
8779 tree_check_failed (const_tree node
, const char *file
,
8780 int line
, const char *function
, ...)
8784 unsigned length
= 0;
8787 va_start (args
, function
);
8788 while ((code
= va_arg (args
, int)))
8789 length
+= 4 + strlen (tree_code_name
[code
]);
8794 va_start (args
, function
);
8795 length
+= strlen ("expected ");
8796 buffer
= tmp
= (char *) alloca (length
);
8798 while ((code
= va_arg (args
, int)))
8800 const char *prefix
= length
? " or " : "expected ";
8802 strcpy (tmp
+ length
, prefix
);
8803 length
+= strlen (prefix
);
8804 strcpy (tmp
+ length
, tree_code_name
[code
]);
8805 length
+= strlen (tree_code_name
[code
]);
8810 buffer
= "unexpected node";
8812 internal_error ("tree check: %s, have %s in %s, at %s:%d",
8813 buffer
, tree_code_name
[TREE_CODE (node
)],
8814 function
, trim_filename (file
), line
);
8817 /* Complain that the tree code of NODE does match the expected 0
8818 terminated list of trailing codes. FILE, LINE, and FUNCTION are of
8822 tree_not_check_failed (const_tree node
, const char *file
,
8823 int line
, const char *function
, ...)
8827 unsigned length
= 0;
8830 va_start (args
, function
);
8831 while ((code
= va_arg (args
, int)))
8832 length
+= 4 + strlen (tree_code_name
[code
]);
8834 va_start (args
, function
);
8835 buffer
= (char *) alloca (length
);
8837 while ((code
= va_arg (args
, int)))
8841 strcpy (buffer
+ length
, " or ");
8844 strcpy (buffer
+ length
, tree_code_name
[code
]);
8845 length
+= strlen (tree_code_name
[code
]);
8849 internal_error ("tree check: expected none of %s, have %s in %s, at %s:%d",
8850 buffer
, tree_code_name
[TREE_CODE (node
)],
8851 function
, trim_filename (file
), line
);
8854 /* Similar to tree_check_failed, except that we check for a class of tree
8855 code, given in CL. */
8858 tree_class_check_failed (const_tree node
, const enum tree_code_class cl
,
8859 const char *file
, int line
, const char *function
)
8862 ("tree check: expected class %qs, have %qs (%s) in %s, at %s:%d",
8863 TREE_CODE_CLASS_STRING (cl
),
8864 TREE_CODE_CLASS_STRING (TREE_CODE_CLASS (TREE_CODE (node
))),
8865 tree_code_name
[TREE_CODE (node
)], function
, trim_filename (file
), line
);
8868 /* Similar to tree_check_failed, except that instead of specifying a
8869 dozen codes, use the knowledge that they're all sequential. */
8872 tree_range_check_failed (const_tree node
, const char *file
, int line
,
8873 const char *function
, enum tree_code c1
,
8877 unsigned length
= 0;
8880 for (c
= c1
; c
<= c2
; ++c
)
8881 length
+= 4 + strlen (tree_code_name
[c
]);
8883 length
+= strlen ("expected ");
8884 buffer
= (char *) alloca (length
);
8887 for (c
= c1
; c
<= c2
; ++c
)
8889 const char *prefix
= length
? " or " : "expected ";
8891 strcpy (buffer
+ length
, prefix
);
8892 length
+= strlen (prefix
);
8893 strcpy (buffer
+ length
, tree_code_name
[c
]);
8894 length
+= strlen (tree_code_name
[c
]);
8897 internal_error ("tree check: %s, have %s in %s, at %s:%d",
8898 buffer
, tree_code_name
[TREE_CODE (node
)],
8899 function
, trim_filename (file
), line
);
8903 /* Similar to tree_check_failed, except that we check that a tree does
8904 not have the specified code, given in CL. */
8907 tree_not_class_check_failed (const_tree node
, const enum tree_code_class cl
,
8908 const char *file
, int line
, const char *function
)
8911 ("tree check: did not expect class %qs, have %qs (%s) in %s, at %s:%d",
8912 TREE_CODE_CLASS_STRING (cl
),
8913 TREE_CODE_CLASS_STRING (TREE_CODE_CLASS (TREE_CODE (node
))),
8914 tree_code_name
[TREE_CODE (node
)], function
, trim_filename (file
), line
);
8918 /* Similar to tree_check_failed but applied to OMP_CLAUSE codes. */
8921 omp_clause_check_failed (const_tree node
, const char *file
, int line
,
8922 const char *function
, enum omp_clause_code code
)
8924 internal_error ("tree check: expected omp_clause %s, have %s in %s, at %s:%d",
8925 omp_clause_code_name
[code
], tree_code_name
[TREE_CODE (node
)],
8926 function
, trim_filename (file
), line
);
8930 /* Similar to tree_range_check_failed but applied to OMP_CLAUSE codes. */
8933 omp_clause_range_check_failed (const_tree node
, const char *file
, int line
,
8934 const char *function
, enum omp_clause_code c1
,
8935 enum omp_clause_code c2
)
8938 unsigned length
= 0;
8941 for (c
= c1
; c
<= c2
; ++c
)
8942 length
+= 4 + strlen (omp_clause_code_name
[c
]);
8944 length
+= strlen ("expected ");
8945 buffer
= (char *) alloca (length
);
8948 for (c
= c1
; c
<= c2
; ++c
)
8950 const char *prefix
= length
? " or " : "expected ";
8952 strcpy (buffer
+ length
, prefix
);
8953 length
+= strlen (prefix
);
8954 strcpy (buffer
+ length
, omp_clause_code_name
[c
]);
8955 length
+= strlen (omp_clause_code_name
[c
]);
8958 internal_error ("tree check: %s, have %s in %s, at %s:%d",
8959 buffer
, omp_clause_code_name
[TREE_CODE (node
)],
8960 function
, trim_filename (file
), line
);
8964 #undef DEFTREESTRUCT
8965 #define DEFTREESTRUCT(VAL, NAME) NAME,
8967 static const char *ts_enum_names
[] = {
8968 #include "treestruct.def"
8970 #undef DEFTREESTRUCT
8972 #define TS_ENUM_NAME(EN) (ts_enum_names[(EN)])
8974 /* Similar to tree_class_check_failed, except that we check for
8975 whether CODE contains the tree structure identified by EN. */
8978 tree_contains_struct_check_failed (const_tree node
,
8979 const enum tree_node_structure_enum en
,
8980 const char *file
, int line
,
8981 const char *function
)
8984 ("tree check: expected tree that contains %qs structure, have %qs in %s, at %s:%d",
8986 tree_code_name
[TREE_CODE (node
)], function
, trim_filename (file
), line
);
8990 /* Similar to above, except that the check is for the bounds of a TREE_VEC's
8991 (dynamically sized) vector. */
8994 tree_vec_elt_check_failed (int idx
, int len
, const char *file
, int line
,
8995 const char *function
)
8998 ("tree check: accessed elt %d of tree_vec with %d elts in %s, at %s:%d",
8999 idx
+ 1, len
, function
, trim_filename (file
), line
);
9002 /* Similar to above, except that the check is for the bounds of the operand
9003 vector of an expression node EXP. */
9006 tree_operand_check_failed (int idx
, const_tree exp
, const char *file
,
9007 int line
, const char *function
)
9009 int code
= TREE_CODE (exp
);
9011 ("tree check: accessed operand %d of %s with %d operands in %s, at %s:%d",
9012 idx
+ 1, tree_code_name
[code
], TREE_OPERAND_LENGTH (exp
),
9013 function
, trim_filename (file
), line
);
9016 /* Similar to above, except that the check is for the number of
9017 operands of an OMP_CLAUSE node. */
9020 omp_clause_operand_check_failed (int idx
, const_tree t
, const char *file
,
9021 int line
, const char *function
)
9024 ("tree check: accessed operand %d of omp_clause %s with %d operands "
9025 "in %s, at %s:%d", idx
+ 1, omp_clause_code_name
[OMP_CLAUSE_CODE (t
)],
9026 omp_clause_num_ops
[OMP_CLAUSE_CODE (t
)], function
,
9027 trim_filename (file
), line
);
9029 #endif /* ENABLE_TREE_CHECKING */
9031 /* Create a new vector type node holding SUBPARTS units of type INNERTYPE,
9032 and mapped to the machine mode MODE. Initialize its fields and build
9033 the information necessary for debugging output. */
9036 make_vector_type (tree innertype
, int nunits
, enum machine_mode mode
)
9039 hashval_t hashcode
= 0;
9041 t
= make_node (VECTOR_TYPE
);
9042 TREE_TYPE (t
) = TYPE_MAIN_VARIANT (innertype
);
9043 SET_TYPE_VECTOR_SUBPARTS (t
, nunits
);
9044 SET_TYPE_MODE (t
, mode
);
9046 if (TYPE_STRUCTURAL_EQUALITY_P (innertype
))
9047 SET_TYPE_STRUCTURAL_EQUALITY (t
);
9048 else if (TYPE_CANONICAL (innertype
) != innertype
9049 || mode
!= VOIDmode
)
9051 = make_vector_type (TYPE_CANONICAL (innertype
), nunits
, VOIDmode
);
9055 hashcode
= iterative_hash_host_wide_int (VECTOR_TYPE
, hashcode
);
9056 hashcode
= iterative_hash_host_wide_int (nunits
, hashcode
);
9057 hashcode
= iterative_hash_host_wide_int (mode
, hashcode
);
9058 hashcode
= iterative_hash_object (TYPE_HASH (TREE_TYPE (t
)), hashcode
);
9059 t
= type_hash_canon (hashcode
, t
);
9061 /* We have built a main variant, based on the main variant of the
9062 inner type. Use it to build the variant we return. */
9063 if ((TYPE_ATTRIBUTES (innertype
) || TYPE_QUALS (innertype
))
9064 && TREE_TYPE (t
) != innertype
)
9065 return build_type_attribute_qual_variant (t
,
9066 TYPE_ATTRIBUTES (innertype
),
9067 TYPE_QUALS (innertype
));
9073 make_or_reuse_type (unsigned size
, int unsignedp
)
9075 if (size
== INT_TYPE_SIZE
)
9076 return unsignedp
? unsigned_type_node
: integer_type_node
;
9077 if (size
== CHAR_TYPE_SIZE
)
9078 return unsignedp
? unsigned_char_type_node
: signed_char_type_node
;
9079 if (size
== SHORT_TYPE_SIZE
)
9080 return unsignedp
? short_unsigned_type_node
: short_integer_type_node
;
9081 if (size
== LONG_TYPE_SIZE
)
9082 return unsignedp
? long_unsigned_type_node
: long_integer_type_node
;
9083 if (size
== LONG_LONG_TYPE_SIZE
)
9084 return (unsignedp
? long_long_unsigned_type_node
9085 : long_long_integer_type_node
);
9086 if (size
== 128 && int128_integer_type_node
)
9087 return (unsignedp
? int128_unsigned_type_node
9088 : int128_integer_type_node
);
9091 return make_unsigned_type (size
);
9093 return make_signed_type (size
);
9096 /* Create or reuse a fract type by SIZE, UNSIGNEDP, and SATP. */
9099 make_or_reuse_fract_type (unsigned size
, int unsignedp
, int satp
)
9103 if (size
== SHORT_FRACT_TYPE_SIZE
)
9104 return unsignedp
? sat_unsigned_short_fract_type_node
9105 : sat_short_fract_type_node
;
9106 if (size
== FRACT_TYPE_SIZE
)
9107 return unsignedp
? sat_unsigned_fract_type_node
: sat_fract_type_node
;
9108 if (size
== LONG_FRACT_TYPE_SIZE
)
9109 return unsignedp
? sat_unsigned_long_fract_type_node
9110 : sat_long_fract_type_node
;
9111 if (size
== LONG_LONG_FRACT_TYPE_SIZE
)
9112 return unsignedp
? sat_unsigned_long_long_fract_type_node
9113 : sat_long_long_fract_type_node
;
9117 if (size
== SHORT_FRACT_TYPE_SIZE
)
9118 return unsignedp
? unsigned_short_fract_type_node
9119 : short_fract_type_node
;
9120 if (size
== FRACT_TYPE_SIZE
)
9121 return unsignedp
? unsigned_fract_type_node
: fract_type_node
;
9122 if (size
== LONG_FRACT_TYPE_SIZE
)
9123 return unsignedp
? unsigned_long_fract_type_node
9124 : long_fract_type_node
;
9125 if (size
== LONG_LONG_FRACT_TYPE_SIZE
)
9126 return unsignedp
? unsigned_long_long_fract_type_node
9127 : long_long_fract_type_node
;
9130 return make_fract_type (size
, unsignedp
, satp
);
9133 /* Create or reuse an accum type by SIZE, UNSIGNEDP, and SATP. */
9136 make_or_reuse_accum_type (unsigned size
, int unsignedp
, int satp
)
9140 if (size
== SHORT_ACCUM_TYPE_SIZE
)
9141 return unsignedp
? sat_unsigned_short_accum_type_node
9142 : sat_short_accum_type_node
;
9143 if (size
== ACCUM_TYPE_SIZE
)
9144 return unsignedp
? sat_unsigned_accum_type_node
: sat_accum_type_node
;
9145 if (size
== LONG_ACCUM_TYPE_SIZE
)
9146 return unsignedp
? sat_unsigned_long_accum_type_node
9147 : sat_long_accum_type_node
;
9148 if (size
== LONG_LONG_ACCUM_TYPE_SIZE
)
9149 return unsignedp
? sat_unsigned_long_long_accum_type_node
9150 : sat_long_long_accum_type_node
;
9154 if (size
== SHORT_ACCUM_TYPE_SIZE
)
9155 return unsignedp
? unsigned_short_accum_type_node
9156 : short_accum_type_node
;
9157 if (size
== ACCUM_TYPE_SIZE
)
9158 return unsignedp
? unsigned_accum_type_node
: accum_type_node
;
9159 if (size
== LONG_ACCUM_TYPE_SIZE
)
9160 return unsignedp
? unsigned_long_accum_type_node
9161 : long_accum_type_node
;
9162 if (size
== LONG_LONG_ACCUM_TYPE_SIZE
)
9163 return unsignedp
? unsigned_long_long_accum_type_node
9164 : long_long_accum_type_node
;
9167 return make_accum_type (size
, unsignedp
, satp
);
9170 /* Create nodes for all integer types (and error_mark_node) using the sizes
9171 of C datatypes. SIGNED_CHAR specifies whether char is signed,
9172 SHORT_DOUBLE specifies whether double should be of the same precision
9176 build_common_tree_nodes (bool signed_char
, bool short_double
)
9178 error_mark_node
= make_node (ERROR_MARK
);
9179 TREE_TYPE (error_mark_node
) = error_mark_node
;
9181 initialize_sizetypes ();
9183 /* Define both `signed char' and `unsigned char'. */
9184 signed_char_type_node
= make_signed_type (CHAR_TYPE_SIZE
);
9185 TYPE_STRING_FLAG (signed_char_type_node
) = 1;
9186 unsigned_char_type_node
= make_unsigned_type (CHAR_TYPE_SIZE
);
9187 TYPE_STRING_FLAG (unsigned_char_type_node
) = 1;
9189 /* Define `char', which is like either `signed char' or `unsigned char'
9190 but not the same as either. */
9193 ? make_signed_type (CHAR_TYPE_SIZE
)
9194 : make_unsigned_type (CHAR_TYPE_SIZE
));
9195 TYPE_STRING_FLAG (char_type_node
) = 1;
9197 short_integer_type_node
= make_signed_type (SHORT_TYPE_SIZE
);
9198 short_unsigned_type_node
= make_unsigned_type (SHORT_TYPE_SIZE
);
9199 integer_type_node
= make_signed_type (INT_TYPE_SIZE
);
9200 unsigned_type_node
= make_unsigned_type (INT_TYPE_SIZE
);
9201 long_integer_type_node
= make_signed_type (LONG_TYPE_SIZE
);
9202 long_unsigned_type_node
= make_unsigned_type (LONG_TYPE_SIZE
);
9203 long_long_integer_type_node
= make_signed_type (LONG_LONG_TYPE_SIZE
);
9204 long_long_unsigned_type_node
= make_unsigned_type (LONG_LONG_TYPE_SIZE
);
9205 #if HOST_BITS_PER_WIDE_INT >= 64
9206 /* TODO: This isn't correct, but as logic depends at the moment on
9207 host's instead of target's wide-integer.
9208 If there is a target not supporting TImode, but has an 128-bit
9209 integer-scalar register, this target check needs to be adjusted. */
9210 if (targetm
.scalar_mode_supported_p (TImode
))
9212 int128_integer_type_node
= make_signed_type (128);
9213 int128_unsigned_type_node
= make_unsigned_type (128);
9217 /* Define a boolean type. This type only represents boolean values but
9218 may be larger than char depending on the value of BOOL_TYPE_SIZE.
9219 Front ends which want to override this size (i.e. Java) can redefine
9220 boolean_type_node before calling build_common_tree_nodes_2. */
9221 boolean_type_node
= make_unsigned_type (BOOL_TYPE_SIZE
);
9222 TREE_SET_CODE (boolean_type_node
, BOOLEAN_TYPE
);
9223 TYPE_MAX_VALUE (boolean_type_node
) = build_int_cst (boolean_type_node
, 1);
9224 TYPE_PRECISION (boolean_type_node
) = 1;
9226 /* Define what type to use for size_t. */
9227 if (strcmp (SIZE_TYPE
, "unsigned int") == 0)
9228 size_type_node
= unsigned_type_node
;
9229 else if (strcmp (SIZE_TYPE
, "long unsigned int") == 0)
9230 size_type_node
= long_unsigned_type_node
;
9231 else if (strcmp (SIZE_TYPE
, "long long unsigned int") == 0)
9232 size_type_node
= long_long_unsigned_type_node
;
9236 /* Fill in the rest of the sized types. Reuse existing type nodes
9238 intQI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (QImode
), 0);
9239 intHI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (HImode
), 0);
9240 intSI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (SImode
), 0);
9241 intDI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (DImode
), 0);
9242 intTI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (TImode
), 0);
9244 unsigned_intQI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (QImode
), 1);
9245 unsigned_intHI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (HImode
), 1);
9246 unsigned_intSI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (SImode
), 1);
9247 unsigned_intDI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (DImode
), 1);
9248 unsigned_intTI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (TImode
), 1);
9250 access_public_node
= get_identifier ("public");
9251 access_protected_node
= get_identifier ("protected");
9252 access_private_node
= get_identifier ("private");
9254 /* Define these next since types below may used them. */
9255 integer_zero_node
= build_int_cst (integer_type_node
, 0);
9256 integer_one_node
= build_int_cst (integer_type_node
, 1);
9257 integer_three_node
= build_int_cst (integer_type_node
, 3);
9258 integer_minus_one_node
= build_int_cst (integer_type_node
, -1);
9260 size_zero_node
= size_int (0);
9261 size_one_node
= size_int (1);
9262 bitsize_zero_node
= bitsize_int (0);
9263 bitsize_one_node
= bitsize_int (1);
9264 bitsize_unit_node
= bitsize_int (BITS_PER_UNIT
);
9266 boolean_false_node
= TYPE_MIN_VALUE (boolean_type_node
);
9267 boolean_true_node
= TYPE_MAX_VALUE (boolean_type_node
);
9269 void_type_node
= make_node (VOID_TYPE
);
9270 layout_type (void_type_node
);
9272 /* We are not going to have real types in C with less than byte alignment,
9273 so we might as well not have any types that claim to have it. */
9274 TYPE_ALIGN (void_type_node
) = BITS_PER_UNIT
;
9275 TYPE_USER_ALIGN (void_type_node
) = 0;
9277 null_pointer_node
= build_int_cst (build_pointer_type (void_type_node
), 0);
9278 layout_type (TREE_TYPE (null_pointer_node
));
9280 ptr_type_node
= build_pointer_type (void_type_node
);
9282 = build_pointer_type (build_type_variant (void_type_node
, 1, 0));
9283 fileptr_type_node
= ptr_type_node
;
9285 float_type_node
= make_node (REAL_TYPE
);
9286 TYPE_PRECISION (float_type_node
) = FLOAT_TYPE_SIZE
;
9287 layout_type (float_type_node
);
9289 double_type_node
= make_node (REAL_TYPE
);
9291 TYPE_PRECISION (double_type_node
) = FLOAT_TYPE_SIZE
;
9293 TYPE_PRECISION (double_type_node
) = DOUBLE_TYPE_SIZE
;
9294 layout_type (double_type_node
);
9296 long_double_type_node
= make_node (REAL_TYPE
);
9297 TYPE_PRECISION (long_double_type_node
) = LONG_DOUBLE_TYPE_SIZE
;
9298 layout_type (long_double_type_node
);
9300 float_ptr_type_node
= build_pointer_type (float_type_node
);
9301 double_ptr_type_node
= build_pointer_type (double_type_node
);
9302 long_double_ptr_type_node
= build_pointer_type (long_double_type_node
);
9303 integer_ptr_type_node
= build_pointer_type (integer_type_node
);
9305 /* Fixed size integer types. */
9306 uint32_type_node
= build_nonstandard_integer_type (32, true);
9307 uint64_type_node
= build_nonstandard_integer_type (64, true);
9309 /* Decimal float types. */
9310 dfloat32_type_node
= make_node (REAL_TYPE
);
9311 TYPE_PRECISION (dfloat32_type_node
) = DECIMAL32_TYPE_SIZE
;
9312 layout_type (dfloat32_type_node
);
9313 SET_TYPE_MODE (dfloat32_type_node
, SDmode
);
9314 dfloat32_ptr_type_node
= build_pointer_type (dfloat32_type_node
);
9316 dfloat64_type_node
= make_node (REAL_TYPE
);
9317 TYPE_PRECISION (dfloat64_type_node
) = DECIMAL64_TYPE_SIZE
;
9318 layout_type (dfloat64_type_node
);
9319 SET_TYPE_MODE (dfloat64_type_node
, DDmode
);
9320 dfloat64_ptr_type_node
= build_pointer_type (dfloat64_type_node
);
9322 dfloat128_type_node
= make_node (REAL_TYPE
);
9323 TYPE_PRECISION (dfloat128_type_node
) = DECIMAL128_TYPE_SIZE
;
9324 layout_type (dfloat128_type_node
);
9325 SET_TYPE_MODE (dfloat128_type_node
, TDmode
);
9326 dfloat128_ptr_type_node
= build_pointer_type (dfloat128_type_node
);
9328 complex_integer_type_node
= build_complex_type (integer_type_node
);
9329 complex_float_type_node
= build_complex_type (float_type_node
);
9330 complex_double_type_node
= build_complex_type (double_type_node
);
9331 complex_long_double_type_node
= build_complex_type (long_double_type_node
);
9333 /* Make fixed-point nodes based on sat/non-sat and signed/unsigned. */
9334 #define MAKE_FIXED_TYPE_NODE(KIND,SIZE) \
9335 sat_ ## KIND ## _type_node = \
9336 make_sat_signed_ ## KIND ## _type (SIZE); \
9337 sat_unsigned_ ## KIND ## _type_node = \
9338 make_sat_unsigned_ ## KIND ## _type (SIZE); \
9339 KIND ## _type_node = make_signed_ ## KIND ## _type (SIZE); \
9340 unsigned_ ## KIND ## _type_node = \
9341 make_unsigned_ ## KIND ## _type (SIZE);
9343 #define MAKE_FIXED_TYPE_NODE_WIDTH(KIND,WIDTH,SIZE) \
9344 sat_ ## WIDTH ## KIND ## _type_node = \
9345 make_sat_signed_ ## KIND ## _type (SIZE); \
9346 sat_unsigned_ ## WIDTH ## KIND ## _type_node = \
9347 make_sat_unsigned_ ## KIND ## _type (SIZE); \
9348 WIDTH ## KIND ## _type_node = make_signed_ ## KIND ## _type (SIZE); \
9349 unsigned_ ## WIDTH ## KIND ## _type_node = \
9350 make_unsigned_ ## KIND ## _type (SIZE);
9352 /* Make fixed-point type nodes based on four different widths. */
9353 #define MAKE_FIXED_TYPE_NODE_FAMILY(N1,N2) \
9354 MAKE_FIXED_TYPE_NODE_WIDTH (N1, short_, SHORT_ ## N2 ## _TYPE_SIZE) \
9355 MAKE_FIXED_TYPE_NODE (N1, N2 ## _TYPE_SIZE) \
9356 MAKE_FIXED_TYPE_NODE_WIDTH (N1, long_, LONG_ ## N2 ## _TYPE_SIZE) \
9357 MAKE_FIXED_TYPE_NODE_WIDTH (N1, long_long_, LONG_LONG_ ## N2 ## _TYPE_SIZE)
9359 /* Make fixed-point mode nodes based on sat/non-sat and signed/unsigned. */
9360 #define MAKE_FIXED_MODE_NODE(KIND,NAME,MODE) \
9361 NAME ## _type_node = \
9362 make_or_reuse_signed_ ## KIND ## _type (GET_MODE_BITSIZE (MODE ## mode)); \
9363 u ## NAME ## _type_node = \
9364 make_or_reuse_unsigned_ ## KIND ## _type \
9365 (GET_MODE_BITSIZE (U ## MODE ## mode)); \
9366 sat_ ## NAME ## _type_node = \
9367 make_or_reuse_sat_signed_ ## KIND ## _type \
9368 (GET_MODE_BITSIZE (MODE ## mode)); \
9369 sat_u ## NAME ## _type_node = \
9370 make_or_reuse_sat_unsigned_ ## KIND ## _type \
9371 (GET_MODE_BITSIZE (U ## MODE ## mode));
9373 /* Fixed-point type and mode nodes. */
9374 MAKE_FIXED_TYPE_NODE_FAMILY (fract
, FRACT
)
9375 MAKE_FIXED_TYPE_NODE_FAMILY (accum
, ACCUM
)
9376 MAKE_FIXED_MODE_NODE (fract
, qq
, QQ
)
9377 MAKE_FIXED_MODE_NODE (fract
, hq
, HQ
)
9378 MAKE_FIXED_MODE_NODE (fract
, sq
, SQ
)
9379 MAKE_FIXED_MODE_NODE (fract
, dq
, DQ
)
9380 MAKE_FIXED_MODE_NODE (fract
, tq
, TQ
)
9381 MAKE_FIXED_MODE_NODE (accum
, ha
, HA
)
9382 MAKE_FIXED_MODE_NODE (accum
, sa
, SA
)
9383 MAKE_FIXED_MODE_NODE (accum
, da
, DA
)
9384 MAKE_FIXED_MODE_NODE (accum
, ta
, TA
)
9387 tree t
= targetm
.build_builtin_va_list ();
9389 /* Many back-ends define record types without setting TYPE_NAME.
9390 If we copied the record type here, we'd keep the original
9391 record type without a name. This breaks name mangling. So,
9392 don't copy record types and let c_common_nodes_and_builtins()
9393 declare the type to be __builtin_va_list. */
9394 if (TREE_CODE (t
) != RECORD_TYPE
)
9395 t
= build_variant_type_copy (t
);
9397 va_list_type_node
= t
;
9401 /* A subroutine of build_common_builtin_nodes. Define a builtin function. */
9404 local_define_builtin (const char *name
, tree type
, enum built_in_function code
,
9405 const char *library_name
, int ecf_flags
)
9409 decl
= add_builtin_function (name
, type
, code
, BUILT_IN_NORMAL
,
9410 library_name
, NULL_TREE
);
9411 if (ecf_flags
& ECF_CONST
)
9412 TREE_READONLY (decl
) = 1;
9413 if (ecf_flags
& ECF_PURE
)
9414 DECL_PURE_P (decl
) = 1;
9415 if (ecf_flags
& ECF_LOOPING_CONST_OR_PURE
)
9416 DECL_LOOPING_CONST_OR_PURE_P (decl
) = 1;
9417 if (ecf_flags
& ECF_NORETURN
)
9418 TREE_THIS_VOLATILE (decl
) = 1;
9419 if (ecf_flags
& ECF_NOTHROW
)
9420 TREE_NOTHROW (decl
) = 1;
9421 if (ecf_flags
& ECF_MALLOC
)
9422 DECL_IS_MALLOC (decl
) = 1;
9423 if (ecf_flags
& ECF_LEAF
)
9424 DECL_ATTRIBUTES (decl
) = tree_cons (get_identifier ("leaf"),
9425 NULL
, DECL_ATTRIBUTES (decl
));
9427 built_in_decls
[code
] = decl
;
9428 implicit_built_in_decls
[code
] = decl
;
9431 /* Call this function after instantiating all builtins that the language
9432 front end cares about. This will build the rest of the builtins that
9433 are relied upon by the tree optimizers and the middle-end. */
9436 build_common_builtin_nodes (void)
9440 if (built_in_decls
[BUILT_IN_MEMCPY
] == NULL
9441 || built_in_decls
[BUILT_IN_MEMMOVE
] == NULL
)
9443 ftype
= build_function_type_list (ptr_type_node
,
9444 ptr_type_node
, const_ptr_type_node
,
9445 size_type_node
, NULL_TREE
);
9447 if (built_in_decls
[BUILT_IN_MEMCPY
] == NULL
)
9448 local_define_builtin ("__builtin_memcpy", ftype
, BUILT_IN_MEMCPY
,
9449 "memcpy", ECF_NOTHROW
| ECF_LEAF
);
9450 if (built_in_decls
[BUILT_IN_MEMMOVE
] == NULL
)
9451 local_define_builtin ("__builtin_memmove", ftype
, BUILT_IN_MEMMOVE
,
9452 "memmove", ECF_NOTHROW
| ECF_LEAF
);
9455 if (built_in_decls
[BUILT_IN_MEMCMP
] == NULL
)
9457 ftype
= build_function_type_list (integer_type_node
, const_ptr_type_node
,
9458 const_ptr_type_node
, size_type_node
,
9460 local_define_builtin ("__builtin_memcmp", ftype
, BUILT_IN_MEMCMP
,
9461 "memcmp", ECF_PURE
| ECF_NOTHROW
| ECF_LEAF
);
9464 if (built_in_decls
[BUILT_IN_MEMSET
] == NULL
)
9466 ftype
= build_function_type_list (ptr_type_node
,
9467 ptr_type_node
, integer_type_node
,
9468 size_type_node
, NULL_TREE
);
9469 local_define_builtin ("__builtin_memset", ftype
, BUILT_IN_MEMSET
,
9470 "memset", ECF_NOTHROW
| ECF_LEAF
);
9473 if (built_in_decls
[BUILT_IN_ALLOCA
] == NULL
)
9475 ftype
= build_function_type_list (ptr_type_node
,
9476 size_type_node
, NULL_TREE
);
9477 local_define_builtin ("__builtin_alloca", ftype
, BUILT_IN_ALLOCA
,
9478 "alloca", ECF_MALLOC
| ECF_NOTHROW
| ECF_LEAF
);
9481 /* If we're checking the stack, `alloca' can throw. */
9482 if (flag_stack_check
)
9483 TREE_NOTHROW (built_in_decls
[BUILT_IN_ALLOCA
]) = 0;
9485 ftype
= build_function_type_list (void_type_node
,
9486 ptr_type_node
, ptr_type_node
,
9487 ptr_type_node
, NULL_TREE
);
9488 local_define_builtin ("__builtin_init_trampoline", ftype
,
9489 BUILT_IN_INIT_TRAMPOLINE
,
9490 "__builtin_init_trampoline", ECF_NOTHROW
| ECF_LEAF
);
9492 ftype
= build_function_type_list (ptr_type_node
, ptr_type_node
, NULL_TREE
);
9493 local_define_builtin ("__builtin_adjust_trampoline", ftype
,
9494 BUILT_IN_ADJUST_TRAMPOLINE
,
9495 "__builtin_adjust_trampoline",
9496 ECF_CONST
| ECF_NOTHROW
);
9498 ftype
= build_function_type_list (void_type_node
,
9499 ptr_type_node
, ptr_type_node
, NULL_TREE
);
9500 local_define_builtin ("__builtin_nonlocal_goto", ftype
,
9501 BUILT_IN_NONLOCAL_GOTO
,
9502 "__builtin_nonlocal_goto",
9503 ECF_NORETURN
| ECF_NOTHROW
);
9505 ftype
= build_function_type_list (void_type_node
,
9506 ptr_type_node
, ptr_type_node
, NULL_TREE
);
9507 local_define_builtin ("__builtin_setjmp_setup", ftype
,
9508 BUILT_IN_SETJMP_SETUP
,
9509 "__builtin_setjmp_setup", ECF_NOTHROW
);
9511 ftype
= build_function_type_list (ptr_type_node
, ptr_type_node
, NULL_TREE
);
9512 local_define_builtin ("__builtin_setjmp_dispatcher", ftype
,
9513 BUILT_IN_SETJMP_DISPATCHER
,
9514 "__builtin_setjmp_dispatcher",
9515 ECF_PURE
| ECF_NOTHROW
);
9517 ftype
= build_function_type_list (void_type_node
, ptr_type_node
, NULL_TREE
);
9518 local_define_builtin ("__builtin_setjmp_receiver", ftype
,
9519 BUILT_IN_SETJMP_RECEIVER
,
9520 "__builtin_setjmp_receiver", ECF_NOTHROW
);
9522 ftype
= build_function_type_list (ptr_type_node
, NULL_TREE
);
9523 local_define_builtin ("__builtin_stack_save", ftype
, BUILT_IN_STACK_SAVE
,
9524 "__builtin_stack_save", ECF_NOTHROW
| ECF_LEAF
);
9526 ftype
= build_function_type_list (void_type_node
, ptr_type_node
, NULL_TREE
);
9527 local_define_builtin ("__builtin_stack_restore", ftype
,
9528 BUILT_IN_STACK_RESTORE
,
9529 "__builtin_stack_restore", ECF_NOTHROW
| ECF_LEAF
);
9531 /* If there's a possibility that we might use the ARM EABI, build the
9532 alternate __cxa_end_cleanup node used to resume from C++ and Java. */
9533 if (targetm
.arm_eabi_unwinder
)
9535 ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
9536 local_define_builtin ("__builtin_cxa_end_cleanup", ftype
,
9537 BUILT_IN_CXA_END_CLEANUP
,
9538 "__cxa_end_cleanup", ECF_NORETURN
| ECF_LEAF
);
9541 ftype
= build_function_type_list (void_type_node
, ptr_type_node
, NULL_TREE
);
9542 local_define_builtin ("__builtin_unwind_resume", ftype
,
9543 BUILT_IN_UNWIND_RESUME
,
9544 ((targetm_common
.except_unwind_info (&global_options
)
9546 ? "_Unwind_SjLj_Resume" : "_Unwind_Resume"),
9549 /* The exception object and filter values from the runtime. The argument
9550 must be zero before exception lowering, i.e. from the front end. After
9551 exception lowering, it will be the region number for the exception
9552 landing pad. These functions are PURE instead of CONST to prevent
9553 them from being hoisted past the exception edge that will initialize
9554 its value in the landing pad. */
9555 ftype
= build_function_type_list (ptr_type_node
,
9556 integer_type_node
, NULL_TREE
);
9557 local_define_builtin ("__builtin_eh_pointer", ftype
, BUILT_IN_EH_POINTER
,
9558 "__builtin_eh_pointer", ECF_PURE
| ECF_NOTHROW
| ECF_LEAF
);
9560 tmp
= lang_hooks
.types
.type_for_mode (targetm
.eh_return_filter_mode (), 0);
9561 ftype
= build_function_type_list (tmp
, integer_type_node
, NULL_TREE
);
9562 local_define_builtin ("__builtin_eh_filter", ftype
, BUILT_IN_EH_FILTER
,
9563 "__builtin_eh_filter", ECF_PURE
| ECF_NOTHROW
| ECF_LEAF
);
9565 ftype
= build_function_type_list (void_type_node
,
9566 integer_type_node
, integer_type_node
,
9568 local_define_builtin ("__builtin_eh_copy_values", ftype
,
9569 BUILT_IN_EH_COPY_VALUES
,
9570 "__builtin_eh_copy_values", ECF_NOTHROW
);
9572 /* Complex multiplication and division. These are handled as builtins
9573 rather than optabs because emit_library_call_value doesn't support
9574 complex. Further, we can do slightly better with folding these
9575 beasties if the real and complex parts of the arguments are separate. */
9579 for (mode
= MIN_MODE_COMPLEX_FLOAT
; mode
<= MAX_MODE_COMPLEX_FLOAT
; ++mode
)
9581 char mode_name_buf
[4], *q
;
9583 enum built_in_function mcode
, dcode
;
9584 tree type
, inner_type
;
9585 const char *prefix
= "__";
9587 if (targetm
.libfunc_gnu_prefix
)
9590 type
= lang_hooks
.types
.type_for_mode ((enum machine_mode
) mode
, 0);
9593 inner_type
= TREE_TYPE (type
);
9595 ftype
= build_function_type_list (type
, inner_type
, inner_type
,
9596 inner_type
, inner_type
, NULL_TREE
);
9598 mcode
= ((enum built_in_function
)
9599 (BUILT_IN_COMPLEX_MUL_MIN
+ mode
- MIN_MODE_COMPLEX_FLOAT
));
9600 dcode
= ((enum built_in_function
)
9601 (BUILT_IN_COMPLEX_DIV_MIN
+ mode
- MIN_MODE_COMPLEX_FLOAT
));
9603 for (p
= GET_MODE_NAME (mode
), q
= mode_name_buf
; *p
; p
++, q
++)
9607 built_in_names
[mcode
] = concat (prefix
, "mul", mode_name_buf
, "3",
9609 local_define_builtin (built_in_names
[mcode
], ftype
, mcode
,
9610 built_in_names
[mcode
],
9611 ECF_CONST
| ECF_NOTHROW
| ECF_LEAF
);
9613 built_in_names
[dcode
] = concat (prefix
, "div", mode_name_buf
, "3",
9615 local_define_builtin (built_in_names
[dcode
], ftype
, dcode
,
9616 built_in_names
[dcode
],
9617 ECF_CONST
| ECF_NOTHROW
| ECF_LEAF
);
9622 /* HACK. GROSS. This is absolutely disgusting. I wish there was a
9625 If we requested a pointer to a vector, build up the pointers that
9626 we stripped off while looking for the inner type. Similarly for
9627 return values from functions.
9629 The argument TYPE is the top of the chain, and BOTTOM is the
9630 new type which we will point to. */
9633 reconstruct_complex_type (tree type
, tree bottom
)
9637 if (TREE_CODE (type
) == POINTER_TYPE
)
9639 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
9640 outer
= build_pointer_type_for_mode (inner
, TYPE_MODE (type
),
9641 TYPE_REF_CAN_ALIAS_ALL (type
));
9643 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9645 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
9646 outer
= build_reference_type_for_mode (inner
, TYPE_MODE (type
),
9647 TYPE_REF_CAN_ALIAS_ALL (type
));
9649 else if (TREE_CODE (type
) == ARRAY_TYPE
)
9651 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
9652 outer
= build_array_type (inner
, TYPE_DOMAIN (type
));
9654 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9656 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
9657 outer
= build_function_type (inner
, TYPE_ARG_TYPES (type
));
9659 else if (TREE_CODE (type
) == METHOD_TYPE
)
9661 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
9662 /* The build_method_type_directly() routine prepends 'this' to argument list,
9663 so we must compensate by getting rid of it. */
9665 = build_method_type_directly
9666 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (type
))),
9668 TREE_CHAIN (TYPE_ARG_TYPES (type
)));
9670 else if (TREE_CODE (type
) == OFFSET_TYPE
)
9672 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
9673 outer
= build_offset_type (TYPE_OFFSET_BASETYPE (type
), inner
);
9678 return build_type_attribute_qual_variant (outer
, TYPE_ATTRIBUTES (type
),
9682 /* Returns a vector tree node given a mode (integer, vector, or BLKmode) and
9685 build_vector_type_for_mode (tree innertype
, enum machine_mode mode
)
9689 switch (GET_MODE_CLASS (mode
))
9691 case MODE_VECTOR_INT
:
9692 case MODE_VECTOR_FLOAT
:
9693 case MODE_VECTOR_FRACT
:
9694 case MODE_VECTOR_UFRACT
:
9695 case MODE_VECTOR_ACCUM
:
9696 case MODE_VECTOR_UACCUM
:
9697 nunits
= GET_MODE_NUNITS (mode
);
9701 /* Check that there are no leftover bits. */
9702 gcc_assert (GET_MODE_BITSIZE (mode
)
9703 % TREE_INT_CST_LOW (TYPE_SIZE (innertype
)) == 0);
9705 nunits
= GET_MODE_BITSIZE (mode
)
9706 / TREE_INT_CST_LOW (TYPE_SIZE (innertype
));
9713 return make_vector_type (innertype
, nunits
, mode
);
9716 /* Similarly, but takes the inner type and number of units, which must be
9720 build_vector_type (tree innertype
, int nunits
)
9722 return make_vector_type (innertype
, nunits
, VOIDmode
);
9725 /* Similarly, but takes the inner type and number of units, which must be
9729 build_opaque_vector_type (tree innertype
, int nunits
)
9732 innertype
= build_distinct_type_copy (innertype
);
9733 t
= make_vector_type (innertype
, nunits
, VOIDmode
);
9734 TYPE_VECTOR_OPAQUE (t
) = true;
9739 /* Given an initializer INIT, return TRUE if INIT is zero or some
9740 aggregate of zeros. Otherwise return FALSE. */
9742 initializer_zerop (const_tree init
)
9748 switch (TREE_CODE (init
))
9751 return integer_zerop (init
);
9754 /* ??? Note that this is not correct for C4X float formats. There,
9755 a bit pattern of all zeros is 1.0; 0.0 is encoded with the most
9756 negative exponent. */
9757 return real_zerop (init
)
9758 && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (init
));
9761 return fixed_zerop (init
);
9764 return integer_zerop (init
)
9765 || (real_zerop (init
)
9766 && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (TREE_REALPART (init
)))
9767 && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (TREE_IMAGPART (init
))));
9770 for (elt
= TREE_VECTOR_CST_ELTS (init
); elt
; elt
= TREE_CHAIN (elt
))
9771 if (!initializer_zerop (TREE_VALUE (elt
)))
9777 unsigned HOST_WIDE_INT idx
;
9779 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (init
), idx
, elt
)
9780 if (!initializer_zerop (elt
))
9789 /* We need to loop through all elements to handle cases like
9790 "\0" and "\0foobar". */
9791 for (i
= 0; i
< TREE_STRING_LENGTH (init
); ++i
)
9792 if (TREE_STRING_POINTER (init
)[i
] != '\0')
9803 /* Build an empty statement at location LOC. */
9806 build_empty_stmt (location_t loc
)
9808 tree t
= build1 (NOP_EXPR
, void_type_node
, size_zero_node
);
9809 SET_EXPR_LOCATION (t
, loc
);
9814 /* Build an OpenMP clause with code CODE. LOC is the location of the
9818 build_omp_clause (location_t loc
, enum omp_clause_code code
)
9823 length
= omp_clause_num_ops
[code
];
9824 size
= (sizeof (struct tree_omp_clause
) + (length
- 1) * sizeof (tree
));
9826 record_node_allocation_statistics (OMP_CLAUSE
, size
);
9828 t
= ggc_alloc_tree_node (size
);
9829 memset (t
, 0, size
);
9830 TREE_SET_CODE (t
, OMP_CLAUSE
);
9831 OMP_CLAUSE_SET_CODE (t
, code
);
9832 OMP_CLAUSE_LOCATION (t
) = loc
;
9837 /* Build a tcc_vl_exp object with code CODE and room for LEN operands. LEN
9838 includes the implicit operand count in TREE_OPERAND 0, and so must be >= 1.
9839 Except for the CODE and operand count field, other storage for the
9840 object is initialized to zeros. */
9843 build_vl_exp_stat (enum tree_code code
, int len MEM_STAT_DECL
)
9846 int length
= (len
- 1) * sizeof (tree
) + sizeof (struct tree_exp
);
9848 gcc_assert (TREE_CODE_CLASS (code
) == tcc_vl_exp
);
9849 gcc_assert (len
>= 1);
9851 record_node_allocation_statistics (code
, length
);
9853 t
= ggc_alloc_zone_cleared_tree_node_stat (&tree_zone
, length PASS_MEM_STAT
);
9855 TREE_SET_CODE (t
, code
);
9857 /* Can't use TREE_OPERAND to store the length because if checking is
9858 enabled, it will try to check the length before we store it. :-P */
9859 t
->exp
.operands
[0] = build_int_cst (sizetype
, len
);
9864 /* Helper function for build_call_* functions; build a CALL_EXPR with
9865 indicated RETURN_TYPE, FN, and NARGS, but do not initialize any of
9866 the argument slots. */
9869 build_call_1 (tree return_type
, tree fn
, int nargs
)
9873 t
= build_vl_exp (CALL_EXPR
, nargs
+ 3);
9874 TREE_TYPE (t
) = return_type
;
9875 CALL_EXPR_FN (t
) = fn
;
9876 CALL_EXPR_STATIC_CHAIN (t
) = NULL
;
9881 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and
9882 FN and a null static chain slot. NARGS is the number of call arguments
9883 which are specified as "..." arguments. */
9886 build_call_nary (tree return_type
, tree fn
, int nargs
, ...)
9890 va_start (args
, nargs
);
9891 ret
= build_call_valist (return_type
, fn
, nargs
, args
);
9896 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and
9897 FN and a null static chain slot. NARGS is the number of call arguments
9898 which are specified as a va_list ARGS. */
9901 build_call_valist (tree return_type
, tree fn
, int nargs
, va_list args
)
9906 t
= build_call_1 (return_type
, fn
, nargs
);
9907 for (i
= 0; i
< nargs
; i
++)
9908 CALL_EXPR_ARG (t
, i
) = va_arg (args
, tree
);
9909 process_call_operands (t
);
9913 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and
9914 FN and a null static chain slot. NARGS is the number of call arguments
9915 which are specified as a tree array ARGS. */
9918 build_call_array_loc (location_t loc
, tree return_type
, tree fn
,
9919 int nargs
, const tree
*args
)
9924 t
= build_call_1 (return_type
, fn
, nargs
);
9925 for (i
= 0; i
< nargs
; i
++)
9926 CALL_EXPR_ARG (t
, i
) = args
[i
];
9927 process_call_operands (t
);
9928 SET_EXPR_LOCATION (t
, loc
);
9932 /* Like build_call_array, but takes a VEC. */
9935 build_call_vec (tree return_type
, tree fn
, VEC(tree
,gc
) *args
)
9940 ret
= build_call_1 (return_type
, fn
, VEC_length (tree
, args
));
9941 FOR_EACH_VEC_ELT (tree
, args
, ix
, t
)
9942 CALL_EXPR_ARG (ret
, ix
) = t
;
9943 process_call_operands (ret
);
9948 /* Returns true if it is possible to prove that the index of
9949 an array access REF (an ARRAY_REF expression) falls into the
9953 in_array_bounds_p (tree ref
)
9955 tree idx
= TREE_OPERAND (ref
, 1);
9958 if (TREE_CODE (idx
) != INTEGER_CST
)
9961 min
= array_ref_low_bound (ref
);
9962 max
= array_ref_up_bound (ref
);
9965 || TREE_CODE (min
) != INTEGER_CST
9966 || TREE_CODE (max
) != INTEGER_CST
)
9969 if (tree_int_cst_lt (idx
, min
)
9970 || tree_int_cst_lt (max
, idx
))
9976 /* Returns true if it is possible to prove that the range of
9977 an array access REF (an ARRAY_RANGE_REF expression) falls
9978 into the array bounds. */
9981 range_in_array_bounds_p (tree ref
)
9983 tree domain_type
= TYPE_DOMAIN (TREE_TYPE (ref
));
9984 tree range_min
, range_max
, min
, max
;
9986 range_min
= TYPE_MIN_VALUE (domain_type
);
9987 range_max
= TYPE_MAX_VALUE (domain_type
);
9990 || TREE_CODE (range_min
) != INTEGER_CST
9991 || TREE_CODE (range_max
) != INTEGER_CST
)
9994 min
= array_ref_low_bound (ref
);
9995 max
= array_ref_up_bound (ref
);
9998 || TREE_CODE (min
) != INTEGER_CST
9999 || TREE_CODE (max
) != INTEGER_CST
)
10002 if (tree_int_cst_lt (range_min
, min
)
10003 || tree_int_cst_lt (max
, range_max
))
10009 /* Return true if T (assumed to be a DECL) must be assigned a memory
10013 needs_to_live_in_memory (const_tree t
)
10015 if (TREE_CODE (t
) == SSA_NAME
)
10016 t
= SSA_NAME_VAR (t
);
10018 return (TREE_ADDRESSABLE (t
)
10019 || is_global_var (t
)
10020 || (TREE_CODE (t
) == RESULT_DECL
10021 && !DECL_BY_REFERENCE (t
)
10022 && aggregate_value_p (t
, current_function_decl
)));
10025 /* Return value of a constant X and sign-extend it. */
10028 int_cst_value (const_tree x
)
10030 unsigned bits
= TYPE_PRECISION (TREE_TYPE (x
));
10031 unsigned HOST_WIDE_INT val
= TREE_INT_CST_LOW (x
);
10033 /* Make sure the sign-extended value will fit in a HOST_WIDE_INT. */
10034 gcc_assert (TREE_INT_CST_HIGH (x
) == 0
10035 || TREE_INT_CST_HIGH (x
) == -1);
10037 if (bits
< HOST_BITS_PER_WIDE_INT
)
10039 bool negative
= ((val
>> (bits
- 1)) & 1) != 0;
10041 val
|= (~(unsigned HOST_WIDE_INT
) 0) << (bits
- 1) << 1;
10043 val
&= ~((~(unsigned HOST_WIDE_INT
) 0) << (bits
- 1) << 1);
10049 /* Return value of a constant X and sign-extend it. */
10052 widest_int_cst_value (const_tree x
)
10054 unsigned bits
= TYPE_PRECISION (TREE_TYPE (x
));
10055 unsigned HOST_WIDEST_INT val
= TREE_INT_CST_LOW (x
);
10057 #if HOST_BITS_PER_WIDEST_INT > HOST_BITS_PER_WIDE_INT
10058 gcc_assert (HOST_BITS_PER_WIDEST_INT
>= 2 * HOST_BITS_PER_WIDE_INT
);
10059 val
|= (((unsigned HOST_WIDEST_INT
) TREE_INT_CST_HIGH (x
))
10060 << HOST_BITS_PER_WIDE_INT
);
10062 /* Make sure the sign-extended value will fit in a HOST_WIDE_INT. */
10063 gcc_assert (TREE_INT_CST_HIGH (x
) == 0
10064 || TREE_INT_CST_HIGH (x
) == -1);
10067 if (bits
< HOST_BITS_PER_WIDEST_INT
)
10069 bool negative
= ((val
>> (bits
- 1)) & 1) != 0;
10071 val
|= (~(unsigned HOST_WIDEST_INT
) 0) << (bits
- 1) << 1;
10073 val
&= ~((~(unsigned HOST_WIDEST_INT
) 0) << (bits
- 1) << 1);
10079 /* If TYPE is an integral type, return an equivalent type which is
10080 unsigned iff UNSIGNEDP is true. If TYPE is not an integral type,
10081 return TYPE itself. */
10084 signed_or_unsigned_type_for (int unsignedp
, tree type
)
10087 if (POINTER_TYPE_P (type
))
10089 /* If the pointer points to the normal address space, use the
10090 size_type_node. Otherwise use an appropriate size for the pointer
10091 based on the named address space it points to. */
10092 if (!TYPE_ADDR_SPACE (TREE_TYPE (t
)))
10093 t
= size_type_node
;
10095 return lang_hooks
.types
.type_for_size (TYPE_PRECISION (t
), unsignedp
);
10098 if (!INTEGRAL_TYPE_P (t
) || TYPE_UNSIGNED (t
) == unsignedp
)
10101 return lang_hooks
.types
.type_for_size (TYPE_PRECISION (t
), unsignedp
);
10104 /* Returns unsigned variant of TYPE. */
10107 unsigned_type_for (tree type
)
10109 return signed_or_unsigned_type_for (1, type
);
10112 /* Returns signed variant of TYPE. */
10115 signed_type_for (tree type
)
10117 return signed_or_unsigned_type_for (0, type
);
10120 /* Returns the largest value obtainable by casting something in INNER type to
10124 upper_bound_in_type (tree outer
, tree inner
)
10127 unsigned int det
= 0;
10128 unsigned oprec
= TYPE_PRECISION (outer
);
10129 unsigned iprec
= TYPE_PRECISION (inner
);
10132 /* Compute a unique number for every combination. */
10133 det
|= (oprec
> iprec
) ? 4 : 0;
10134 det
|= TYPE_UNSIGNED (outer
) ? 2 : 0;
10135 det
|= TYPE_UNSIGNED (inner
) ? 1 : 0;
10137 /* Determine the exponent to use. */
10142 /* oprec <= iprec, outer: signed, inner: don't care. */
10147 /* oprec <= iprec, outer: unsigned, inner: don't care. */
10151 /* oprec > iprec, outer: signed, inner: signed. */
10155 /* oprec > iprec, outer: signed, inner: unsigned. */
10159 /* oprec > iprec, outer: unsigned, inner: signed. */
10163 /* oprec > iprec, outer: unsigned, inner: unsigned. */
10167 gcc_unreachable ();
10170 /* Compute 2^^prec - 1. */
10171 if (prec
<= HOST_BITS_PER_WIDE_INT
)
10174 high
.low
= ((~(unsigned HOST_WIDE_INT
) 0)
10175 >> (HOST_BITS_PER_WIDE_INT
- prec
));
10179 high
.high
= ((~(unsigned HOST_WIDE_INT
) 0)
10180 >> (2 * HOST_BITS_PER_WIDE_INT
- prec
));
10181 high
.low
= ~(unsigned HOST_WIDE_INT
) 0;
10184 return double_int_to_tree (outer
, high
);
10187 /* Returns the smallest value obtainable by casting something in INNER type to
10191 lower_bound_in_type (tree outer
, tree inner
)
10194 unsigned oprec
= TYPE_PRECISION (outer
);
10195 unsigned iprec
= TYPE_PRECISION (inner
);
10197 /* If OUTER type is unsigned, we can definitely cast 0 to OUTER type
10199 if (TYPE_UNSIGNED (outer
)
10200 /* If we are widening something of an unsigned type, OUTER type
10201 contains all values of INNER type. In particular, both INNER
10202 and OUTER types have zero in common. */
10203 || (oprec
> iprec
&& TYPE_UNSIGNED (inner
)))
10204 low
.low
= low
.high
= 0;
10207 /* If we are widening a signed type to another signed type, we
10208 want to obtain -2^^(iprec-1). If we are keeping the
10209 precision or narrowing to a signed type, we want to obtain
10211 unsigned prec
= oprec
> iprec
? iprec
: oprec
;
10213 if (prec
<= HOST_BITS_PER_WIDE_INT
)
10215 low
.high
= ~(unsigned HOST_WIDE_INT
) 0;
10216 low
.low
= (~(unsigned HOST_WIDE_INT
) 0) << (prec
- 1);
10220 low
.high
= ((~(unsigned HOST_WIDE_INT
) 0)
10221 << (prec
- HOST_BITS_PER_WIDE_INT
- 1));
10226 return double_int_to_tree (outer
, low
);
10229 /* Return nonzero if two operands that are suitable for PHI nodes are
10230 necessarily equal. Specifically, both ARG0 and ARG1 must be either
10231 SSA_NAME or invariant. Note that this is strictly an optimization.
10232 That is, callers of this function can directly call operand_equal_p
10233 and get the same result, only slower. */
10236 operand_equal_for_phi_arg_p (const_tree arg0
, const_tree arg1
)
10240 if (TREE_CODE (arg0
) == SSA_NAME
|| TREE_CODE (arg1
) == SSA_NAME
)
10242 return operand_equal_p (arg0
, arg1
, 0);
10245 /* Returns number of zeros at the end of binary representation of X.
10247 ??? Use ffs if available? */
10250 num_ending_zeros (const_tree x
)
10252 unsigned HOST_WIDE_INT fr
, nfr
;
10253 unsigned num
, abits
;
10254 tree type
= TREE_TYPE (x
);
10256 if (TREE_INT_CST_LOW (x
) == 0)
10258 num
= HOST_BITS_PER_WIDE_INT
;
10259 fr
= TREE_INT_CST_HIGH (x
);
10264 fr
= TREE_INT_CST_LOW (x
);
10267 for (abits
= HOST_BITS_PER_WIDE_INT
/ 2; abits
; abits
/= 2)
10270 if (nfr
<< abits
== fr
)
10277 if (num
> TYPE_PRECISION (type
))
10278 num
= TYPE_PRECISION (type
);
10280 return build_int_cst_type (type
, num
);
10284 #define WALK_SUBTREE(NODE) \
10287 result = walk_tree_1 (&(NODE), func, data, pset, lh); \
10293 /* This is a subroutine of walk_tree that walks field of TYPE that are to
10294 be walked whenever a type is seen in the tree. Rest of operands and return
10295 value are as for walk_tree. */
10298 walk_type_fields (tree type
, walk_tree_fn func
, void *data
,
10299 struct pointer_set_t
*pset
, walk_tree_lh lh
)
10301 tree result
= NULL_TREE
;
10303 switch (TREE_CODE (type
))
10306 case REFERENCE_TYPE
:
10307 /* We have to worry about mutually recursive pointers. These can't
10308 be written in C. They can in Ada. It's pathological, but
10309 there's an ACATS test (c38102a) that checks it. Deal with this
10310 by checking if we're pointing to another pointer, that one
10311 points to another pointer, that one does too, and we have no htab.
10312 If so, get a hash table. We check three levels deep to avoid
10313 the cost of the hash table if we don't need one. */
10314 if (POINTER_TYPE_P (TREE_TYPE (type
))
10315 && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (type
)))
10316 && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (TREE_TYPE (type
))))
10319 result
= walk_tree_without_duplicates (&TREE_TYPE (type
),
10327 /* ... fall through ... */
10330 WALK_SUBTREE (TREE_TYPE (type
));
10334 WALK_SUBTREE (TYPE_METHOD_BASETYPE (type
));
10336 /* Fall through. */
10338 case FUNCTION_TYPE
:
10339 WALK_SUBTREE (TREE_TYPE (type
));
10343 /* We never want to walk into default arguments. */
10344 for (arg
= TYPE_ARG_TYPES (type
); arg
; arg
= TREE_CHAIN (arg
))
10345 WALK_SUBTREE (TREE_VALUE (arg
));
10350 /* Don't follow this nodes's type if a pointer for fear that
10351 we'll have infinite recursion. If we have a PSET, then we
10354 || (!POINTER_TYPE_P (TREE_TYPE (type
))
10355 && TREE_CODE (TREE_TYPE (type
)) != OFFSET_TYPE
))
10356 WALK_SUBTREE (TREE_TYPE (type
));
10357 WALK_SUBTREE (TYPE_DOMAIN (type
));
10361 WALK_SUBTREE (TREE_TYPE (type
));
10362 WALK_SUBTREE (TYPE_OFFSET_BASETYPE (type
));
10372 /* Apply FUNC to all the sub-trees of TP in a pre-order traversal. FUNC is
10373 called with the DATA and the address of each sub-tree. If FUNC returns a
10374 non-NULL value, the traversal is stopped, and the value returned by FUNC
10375 is returned. If PSET is non-NULL it is used to record the nodes visited,
10376 and to avoid visiting a node more than once. */
10379 walk_tree_1 (tree
*tp
, walk_tree_fn func
, void *data
,
10380 struct pointer_set_t
*pset
, walk_tree_lh lh
)
10382 enum tree_code code
;
10386 #define WALK_SUBTREE_TAIL(NODE) \
10390 goto tail_recurse; \
10395 /* Skip empty subtrees. */
10399 /* Don't walk the same tree twice, if the user has requested
10400 that we avoid doing so. */
10401 if (pset
&& pointer_set_insert (pset
, *tp
))
10404 /* Call the function. */
10406 result
= (*func
) (tp
, &walk_subtrees
, data
);
10408 /* If we found something, return it. */
10412 code
= TREE_CODE (*tp
);
10414 /* Even if we didn't, FUNC may have decided that there was nothing
10415 interesting below this point in the tree. */
10416 if (!walk_subtrees
)
10418 /* But we still need to check our siblings. */
10419 if (code
== TREE_LIST
)
10420 WALK_SUBTREE_TAIL (TREE_CHAIN (*tp
));
10421 else if (code
== OMP_CLAUSE
)
10422 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
10429 result
= (*lh
) (tp
, &walk_subtrees
, func
, data
, pset
);
10430 if (result
|| !walk_subtrees
)
10437 case IDENTIFIER_NODE
:
10444 case PLACEHOLDER_EXPR
:
10448 /* None of these have subtrees other than those already walked
10453 WALK_SUBTREE (TREE_VALUE (*tp
));
10454 WALK_SUBTREE_TAIL (TREE_CHAIN (*tp
));
10459 int len
= TREE_VEC_LENGTH (*tp
);
10464 /* Walk all elements but the first. */
10466 WALK_SUBTREE (TREE_VEC_ELT (*tp
, len
));
10468 /* Now walk the first one as a tail call. */
10469 WALK_SUBTREE_TAIL (TREE_VEC_ELT (*tp
, 0));
10473 WALK_SUBTREE (TREE_REALPART (*tp
));
10474 WALK_SUBTREE_TAIL (TREE_IMAGPART (*tp
));
10478 unsigned HOST_WIDE_INT idx
;
10479 constructor_elt
*ce
;
10482 VEC_iterate(constructor_elt
, CONSTRUCTOR_ELTS (*tp
), idx
, ce
);
10484 WALK_SUBTREE (ce
->value
);
10489 WALK_SUBTREE_TAIL (TREE_OPERAND (*tp
, 0));
10494 for (decl
= BIND_EXPR_VARS (*tp
); decl
; decl
= DECL_CHAIN (decl
))
10496 /* Walk the DECL_INITIAL and DECL_SIZE. We don't want to walk
10497 into declarations that are just mentioned, rather than
10498 declared; they don't really belong to this part of the tree.
10499 And, we can see cycles: the initializer for a declaration
10500 can refer to the declaration itself. */
10501 WALK_SUBTREE (DECL_INITIAL (decl
));
10502 WALK_SUBTREE (DECL_SIZE (decl
));
10503 WALK_SUBTREE (DECL_SIZE_UNIT (decl
));
10505 WALK_SUBTREE_TAIL (BIND_EXPR_BODY (*tp
));
10508 case STATEMENT_LIST
:
10510 tree_stmt_iterator i
;
10511 for (i
= tsi_start (*tp
); !tsi_end_p (i
); tsi_next (&i
))
10512 WALK_SUBTREE (*tsi_stmt_ptr (i
));
10517 switch (OMP_CLAUSE_CODE (*tp
))
10519 case OMP_CLAUSE_PRIVATE
:
10520 case OMP_CLAUSE_SHARED
:
10521 case OMP_CLAUSE_FIRSTPRIVATE
:
10522 case OMP_CLAUSE_COPYIN
:
10523 case OMP_CLAUSE_COPYPRIVATE
:
10524 case OMP_CLAUSE_IF
:
10525 case OMP_CLAUSE_NUM_THREADS
:
10526 case OMP_CLAUSE_SCHEDULE
:
10527 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, 0));
10530 case OMP_CLAUSE_NOWAIT
:
10531 case OMP_CLAUSE_ORDERED
:
10532 case OMP_CLAUSE_DEFAULT
:
10533 case OMP_CLAUSE_UNTIED
:
10534 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
10536 case OMP_CLAUSE_LASTPRIVATE
:
10537 WALK_SUBTREE (OMP_CLAUSE_DECL (*tp
));
10538 WALK_SUBTREE (OMP_CLAUSE_LASTPRIVATE_STMT (*tp
));
10539 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
10541 case OMP_CLAUSE_COLLAPSE
:
10544 for (i
= 0; i
< 3; i
++)
10545 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, i
));
10546 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
10549 case OMP_CLAUSE_REDUCTION
:
10552 for (i
= 0; i
< 4; i
++)
10553 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, i
));
10554 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
10558 gcc_unreachable ();
10566 /* TARGET_EXPRs are peculiar: operands 1 and 3 can be the same.
10567 But, we only want to walk once. */
10568 len
= (TREE_OPERAND (*tp
, 3) == TREE_OPERAND (*tp
, 1)) ? 2 : 3;
10569 for (i
= 0; i
< len
; ++i
)
10570 WALK_SUBTREE (TREE_OPERAND (*tp
, i
));
10571 WALK_SUBTREE_TAIL (TREE_OPERAND (*tp
, len
));
10575 /* If this is a TYPE_DECL, walk into the fields of the type that it's
10576 defining. We only want to walk into these fields of a type in this
10577 case and not in the general case of a mere reference to the type.
10579 The criterion is as follows: if the field can be an expression, it
10580 must be walked only here. This should be in keeping with the fields
10581 that are directly gimplified in gimplify_type_sizes in order for the
10582 mark/copy-if-shared/unmark machinery of the gimplifier to work with
10583 variable-sized types.
10585 Note that DECLs get walked as part of processing the BIND_EXPR. */
10586 if (TREE_CODE (DECL_EXPR_DECL (*tp
)) == TYPE_DECL
)
10588 tree
*type_p
= &TREE_TYPE (DECL_EXPR_DECL (*tp
));
10589 if (TREE_CODE (*type_p
) == ERROR_MARK
)
10592 /* Call the function for the type. See if it returns anything or
10593 doesn't want us to continue. If we are to continue, walk both
10594 the normal fields and those for the declaration case. */
10595 result
= (*func
) (type_p
, &walk_subtrees
, data
);
10596 if (result
|| !walk_subtrees
)
10599 /* But do not walk a pointed-to type since it may itself need to
10600 be walked in the declaration case if it isn't anonymous. */
10601 if (!POINTER_TYPE_P (*type_p
))
10603 result
= walk_type_fields (*type_p
, func
, data
, pset
, lh
);
10608 /* If this is a record type, also walk the fields. */
10609 if (RECORD_OR_UNION_TYPE_P (*type_p
))
10613 for (field
= TYPE_FIELDS (*type_p
); field
;
10614 field
= DECL_CHAIN (field
))
10616 /* We'd like to look at the type of the field, but we can
10617 easily get infinite recursion. So assume it's pointed
10618 to elsewhere in the tree. Also, ignore things that
10620 if (TREE_CODE (field
) != FIELD_DECL
)
10623 WALK_SUBTREE (DECL_FIELD_OFFSET (field
));
10624 WALK_SUBTREE (DECL_SIZE (field
));
10625 WALK_SUBTREE (DECL_SIZE_UNIT (field
));
10626 if (TREE_CODE (*type_p
) == QUAL_UNION_TYPE
)
10627 WALK_SUBTREE (DECL_QUALIFIER (field
));
10631 /* Same for scalar types. */
10632 else if (TREE_CODE (*type_p
) == BOOLEAN_TYPE
10633 || TREE_CODE (*type_p
) == ENUMERAL_TYPE
10634 || TREE_CODE (*type_p
) == INTEGER_TYPE
10635 || TREE_CODE (*type_p
) == FIXED_POINT_TYPE
10636 || TREE_CODE (*type_p
) == REAL_TYPE
)
10638 WALK_SUBTREE (TYPE_MIN_VALUE (*type_p
));
10639 WALK_SUBTREE (TYPE_MAX_VALUE (*type_p
));
10642 WALK_SUBTREE (TYPE_SIZE (*type_p
));
10643 WALK_SUBTREE_TAIL (TYPE_SIZE_UNIT (*type_p
));
10648 if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code
)))
10652 /* Walk over all the sub-trees of this operand. */
10653 len
= TREE_OPERAND_LENGTH (*tp
);
10655 /* Go through the subtrees. We need to do this in forward order so
10656 that the scope of a FOR_EXPR is handled properly. */
10659 for (i
= 0; i
< len
- 1; ++i
)
10660 WALK_SUBTREE (TREE_OPERAND (*tp
, i
));
10661 WALK_SUBTREE_TAIL (TREE_OPERAND (*tp
, len
- 1));
10664 /* If this is a type, walk the needed fields in the type. */
10665 else if (TYPE_P (*tp
))
10666 return walk_type_fields (*tp
, func
, data
, pset
, lh
);
10670 /* We didn't find what we were looking for. */
10673 #undef WALK_SUBTREE_TAIL
10675 #undef WALK_SUBTREE
10677 /* Like walk_tree, but does not walk duplicate nodes more than once. */
10680 walk_tree_without_duplicates_1 (tree
*tp
, walk_tree_fn func
, void *data
,
10684 struct pointer_set_t
*pset
;
10686 pset
= pointer_set_create ();
10687 result
= walk_tree_1 (tp
, func
, data
, pset
, lh
);
10688 pointer_set_destroy (pset
);
10694 tree_block (tree t
)
10696 char const c
= TREE_CODE_CLASS (TREE_CODE (t
));
10698 if (IS_EXPR_CODE_CLASS (c
))
10699 return &t
->exp
.block
;
10700 gcc_unreachable ();
10704 /* Create a nameless artificial label and put it in the current
10705 function context. The label has a location of LOC. Returns the
10706 newly created label. */
10709 create_artificial_label (location_t loc
)
10711 tree lab
= build_decl (loc
,
10712 LABEL_DECL
, NULL_TREE
, void_type_node
);
10714 DECL_ARTIFICIAL (lab
) = 1;
10715 DECL_IGNORED_P (lab
) = 1;
10716 DECL_CONTEXT (lab
) = current_function_decl
;
10720 /* Given a tree, try to return a useful variable name that we can use
10721 to prefix a temporary that is being assigned the value of the tree.
10722 I.E. given <temp> = &A, return A. */
10727 tree stripped_decl
;
10730 STRIP_NOPS (stripped_decl
);
10731 if (DECL_P (stripped_decl
) && DECL_NAME (stripped_decl
))
10732 return IDENTIFIER_POINTER (DECL_NAME (stripped_decl
));
10735 switch (TREE_CODE (stripped_decl
))
10738 return get_name (TREE_OPERAND (stripped_decl
, 0));
10745 /* Return true if TYPE has a variable argument list. */
10748 stdarg_p (const_tree fntype
)
10750 function_args_iterator args_iter
;
10751 tree n
= NULL_TREE
, t
;
10756 FOREACH_FUNCTION_ARGS(fntype
, t
, args_iter
)
10761 return n
!= NULL_TREE
&& n
!= void_type_node
;
10764 /* Return true if TYPE has a prototype. */
10767 prototype_p (tree fntype
)
10771 gcc_assert (fntype
!= NULL_TREE
);
10773 t
= TYPE_ARG_TYPES (fntype
);
10774 return (t
!= NULL_TREE
);
10777 /* If BLOCK is inlined from an __attribute__((__artificial__))
10778 routine, return pointer to location from where it has been
10781 block_nonartificial_location (tree block
)
10783 location_t
*ret
= NULL
;
10785 while (block
&& TREE_CODE (block
) == BLOCK
10786 && BLOCK_ABSTRACT_ORIGIN (block
))
10788 tree ao
= BLOCK_ABSTRACT_ORIGIN (block
);
10790 while (TREE_CODE (ao
) == BLOCK
10791 && BLOCK_ABSTRACT_ORIGIN (ao
)
10792 && BLOCK_ABSTRACT_ORIGIN (ao
) != ao
)
10793 ao
= BLOCK_ABSTRACT_ORIGIN (ao
);
10795 if (TREE_CODE (ao
) == FUNCTION_DECL
)
10797 /* If AO is an artificial inline, point RET to the
10798 call site locus at which it has been inlined and continue
10799 the loop, in case AO's caller is also an artificial
10801 if (DECL_DECLARED_INLINE_P (ao
)
10802 && lookup_attribute ("artificial", DECL_ATTRIBUTES (ao
)))
10803 ret
= &BLOCK_SOURCE_LOCATION (block
);
10807 else if (TREE_CODE (ao
) != BLOCK
)
10810 block
= BLOCK_SUPERCONTEXT (block
);
10816 /* If EXP is inlined from an __attribute__((__artificial__))
10817 function, return the location of the original call expression. */
10820 tree_nonartificial_location (tree exp
)
10822 location_t
*loc
= block_nonartificial_location (TREE_BLOCK (exp
));
10827 return EXPR_LOCATION (exp
);
10831 /* These are the hash table functions for the hash table of OPTIMIZATION_NODEq
10834 /* Return the hash code code X, an OPTIMIZATION_NODE or TARGET_OPTION code. */
10837 cl_option_hash_hash (const void *x
)
10839 const_tree
const t
= (const_tree
) x
;
10843 hashval_t hash
= 0;
10845 if (TREE_CODE (t
) == OPTIMIZATION_NODE
)
10847 p
= (const char *)TREE_OPTIMIZATION (t
);
10848 len
= sizeof (struct cl_optimization
);
10851 else if (TREE_CODE (t
) == TARGET_OPTION_NODE
)
10853 p
= (const char *)TREE_TARGET_OPTION (t
);
10854 len
= sizeof (struct cl_target_option
);
10858 gcc_unreachable ();
10860 /* assume most opt flags are just 0/1, some are 2-3, and a few might be
10862 for (i
= 0; i
< len
; i
++)
10864 hash
= (hash
<< 4) ^ ((i
<< 2) | p
[i
]);
10869 /* Return nonzero if the value represented by *X (an OPTIMIZATION or
10870 TARGET_OPTION tree node) is the same as that given by *Y, which is the
10874 cl_option_hash_eq (const void *x
, const void *y
)
10876 const_tree
const xt
= (const_tree
) x
;
10877 const_tree
const yt
= (const_tree
) y
;
10882 if (TREE_CODE (xt
) != TREE_CODE (yt
))
10885 if (TREE_CODE (xt
) == OPTIMIZATION_NODE
)
10887 xp
= (const char *)TREE_OPTIMIZATION (xt
);
10888 yp
= (const char *)TREE_OPTIMIZATION (yt
);
10889 len
= sizeof (struct cl_optimization
);
10892 else if (TREE_CODE (xt
) == TARGET_OPTION_NODE
)
10894 xp
= (const char *)TREE_TARGET_OPTION (xt
);
10895 yp
= (const char *)TREE_TARGET_OPTION (yt
);
10896 len
= sizeof (struct cl_target_option
);
10900 gcc_unreachable ();
10902 return (memcmp (xp
, yp
, len
) == 0);
10905 /* Build an OPTIMIZATION_NODE based on the current options. */
10908 build_optimization_node (void)
10913 /* Use the cache of optimization nodes. */
10915 cl_optimization_save (TREE_OPTIMIZATION (cl_optimization_node
),
10918 slot
= htab_find_slot (cl_option_hash_table
, cl_optimization_node
, INSERT
);
10922 /* Insert this one into the hash table. */
10923 t
= cl_optimization_node
;
10926 /* Make a new node for next time round. */
10927 cl_optimization_node
= make_node (OPTIMIZATION_NODE
);
10933 /* Build a TARGET_OPTION_NODE based on the current options. */
10936 build_target_option_node (void)
10941 /* Use the cache of optimization nodes. */
10943 cl_target_option_save (TREE_TARGET_OPTION (cl_target_option_node
),
10946 slot
= htab_find_slot (cl_option_hash_table
, cl_target_option_node
, INSERT
);
10950 /* Insert this one into the hash table. */
10951 t
= cl_target_option_node
;
10954 /* Make a new node for next time round. */
10955 cl_target_option_node
= make_node (TARGET_OPTION_NODE
);
10961 /* Determine the "ultimate origin" of a block. The block may be an inlined
10962 instance of an inlined instance of a block which is local to an inline
10963 function, so we have to trace all of the way back through the origin chain
10964 to find out what sort of node actually served as the original seed for the
10968 block_ultimate_origin (const_tree block
)
10970 tree immediate_origin
= BLOCK_ABSTRACT_ORIGIN (block
);
10972 /* output_inline_function sets BLOCK_ABSTRACT_ORIGIN for all the
10973 nodes in the function to point to themselves; ignore that if
10974 we're trying to output the abstract instance of this function. */
10975 if (BLOCK_ABSTRACT (block
) && immediate_origin
== block
)
10978 if (immediate_origin
== NULL_TREE
)
10983 tree lookahead
= immediate_origin
;
10987 ret_val
= lookahead
;
10988 lookahead
= (TREE_CODE (ret_val
) == BLOCK
10989 ? BLOCK_ABSTRACT_ORIGIN (ret_val
) : NULL
);
10991 while (lookahead
!= NULL
&& lookahead
!= ret_val
);
10993 /* The block's abstract origin chain may not be the *ultimate* origin of
10994 the block. It could lead to a DECL that has an abstract origin set.
10995 If so, we want that DECL's abstract origin (which is what DECL_ORIGIN
10996 will give us if it has one). Note that DECL's abstract origins are
10997 supposed to be the most distant ancestor (or so decl_ultimate_origin
10998 claims), so we don't need to loop following the DECL origins. */
10999 if (DECL_P (ret_val
))
11000 return DECL_ORIGIN (ret_val
);
11006 /* Return true if T1 and T2 are equivalent lists. */
11009 list_equal_p (const_tree t1
, const_tree t2
)
11011 for (; t1
&& t2
; t1
= TREE_CHAIN (t1
) , t2
= TREE_CHAIN (t2
))
11012 if (TREE_VALUE (t1
) != TREE_VALUE (t2
))
11017 /* Return true iff conversion in EXP generates no instruction. Mark
11018 it inline so that we fully inline into the stripping functions even
11019 though we have two uses of this function. */
11022 tree_nop_conversion (const_tree exp
)
11024 tree outer_type
, inner_type
;
11026 if (!CONVERT_EXPR_P (exp
)
11027 && TREE_CODE (exp
) != NON_LVALUE_EXPR
)
11029 if (TREE_OPERAND (exp
, 0) == error_mark_node
)
11032 outer_type
= TREE_TYPE (exp
);
11033 inner_type
= TREE_TYPE (TREE_OPERAND (exp
, 0));
11038 /* Use precision rather then machine mode when we can, which gives
11039 the correct answer even for submode (bit-field) types. */
11040 if ((INTEGRAL_TYPE_P (outer_type
)
11041 || POINTER_TYPE_P (outer_type
)
11042 || TREE_CODE (outer_type
) == OFFSET_TYPE
)
11043 && (INTEGRAL_TYPE_P (inner_type
)
11044 || POINTER_TYPE_P (inner_type
)
11045 || TREE_CODE (inner_type
) == OFFSET_TYPE
))
11046 return TYPE_PRECISION (outer_type
) == TYPE_PRECISION (inner_type
);
11048 /* Otherwise fall back on comparing machine modes (e.g. for
11049 aggregate types, floats). */
11050 return TYPE_MODE (outer_type
) == TYPE_MODE (inner_type
);
11053 /* Return true iff conversion in EXP generates no instruction. Don't
11054 consider conversions changing the signedness. */
11057 tree_sign_nop_conversion (const_tree exp
)
11059 tree outer_type
, inner_type
;
11061 if (!tree_nop_conversion (exp
))
11064 outer_type
= TREE_TYPE (exp
);
11065 inner_type
= TREE_TYPE (TREE_OPERAND (exp
, 0));
11067 return (TYPE_UNSIGNED (outer_type
) == TYPE_UNSIGNED (inner_type
)
11068 && POINTER_TYPE_P (outer_type
) == POINTER_TYPE_P (inner_type
));
11071 /* Strip conversions from EXP according to tree_nop_conversion and
11072 return the resulting expression. */
11075 tree_strip_nop_conversions (tree exp
)
11077 while (tree_nop_conversion (exp
))
11078 exp
= TREE_OPERAND (exp
, 0);
11082 /* Strip conversions from EXP according to tree_sign_nop_conversion
11083 and return the resulting expression. */
11086 tree_strip_sign_nop_conversions (tree exp
)
11088 while (tree_sign_nop_conversion (exp
))
11089 exp
= TREE_OPERAND (exp
, 0);
11093 static GTY(()) tree gcc_eh_personality_decl
;
11095 /* Return the GCC personality function decl. */
11098 lhd_gcc_personality (void)
11100 if (!gcc_eh_personality_decl
)
11101 gcc_eh_personality_decl
= build_personality_function ("gcc");
11102 return gcc_eh_personality_decl
;
11105 /* Try to find a base info of BINFO that would have its field decl at offset
11106 OFFSET within the BINFO type and which is of EXPECTED_TYPE. If it can be
11107 found, return, otherwise return NULL_TREE. */
11110 get_binfo_at_offset (tree binfo
, HOST_WIDE_INT offset
, tree expected_type
)
11112 tree type
= BINFO_TYPE (binfo
);
11116 HOST_WIDE_INT pos
, size
;
11120 if (TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (expected_type
))
11125 for (fld
= TYPE_FIELDS (type
); fld
; fld
= DECL_CHAIN (fld
))
11127 if (TREE_CODE (fld
) != FIELD_DECL
)
11130 pos
= int_bit_position (fld
);
11131 size
= tree_low_cst (DECL_SIZE (fld
), 1);
11132 if (pos
<= offset
&& (pos
+ size
) > offset
)
11135 if (!fld
|| TREE_CODE (TREE_TYPE (fld
)) != RECORD_TYPE
)
11138 if (!DECL_ARTIFICIAL (fld
))
11140 binfo
= TYPE_BINFO (TREE_TYPE (fld
));
11144 /* Offset 0 indicates the primary base, whose vtable contents are
11145 represented in the binfo for the derived class. */
11146 else if (offset
!= 0)
11148 tree base_binfo
, found_binfo
= NULL_TREE
;
11149 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
11150 if (TREE_TYPE (base_binfo
) == TREE_TYPE (fld
))
11152 found_binfo
= base_binfo
;
11157 binfo
= found_binfo
;
11160 type
= TREE_TYPE (fld
);
11165 /* Returns true if X is a typedef decl. */
11168 is_typedef_decl (tree x
)
11170 return (x
&& TREE_CODE (x
) == TYPE_DECL
11171 && DECL_ORIGINAL_TYPE (x
) != NULL_TREE
);
11174 /* Returns true iff TYPE is a type variant created for a typedef. */
11177 typedef_variant_p (tree type
)
11179 return is_typedef_decl (TYPE_NAME (type
));
11182 /* Warn about a use of an identifier which was marked deprecated. */
11184 warn_deprecated_use (tree node
, tree attr
)
11188 if (node
== 0 || !warn_deprecated_decl
)
11194 attr
= DECL_ATTRIBUTES (node
);
11195 else if (TYPE_P (node
))
11197 tree decl
= TYPE_STUB_DECL (node
);
11199 attr
= lookup_attribute ("deprecated",
11200 TYPE_ATTRIBUTES (TREE_TYPE (decl
)));
11205 attr
= lookup_attribute ("deprecated", attr
);
11208 msg
= TREE_STRING_POINTER (TREE_VALUE (TREE_VALUE (attr
)));
11214 expanded_location xloc
= expand_location (DECL_SOURCE_LOCATION (node
));
11216 warning (OPT_Wdeprecated_declarations
,
11217 "%qD is deprecated (declared at %s:%d): %s",
11218 node
, xloc
.file
, xloc
.line
, msg
);
11220 warning (OPT_Wdeprecated_declarations
,
11221 "%qD is deprecated (declared at %s:%d)",
11222 node
, xloc
.file
, xloc
.line
);
11224 else if (TYPE_P (node
))
11226 tree what
= NULL_TREE
;
11227 tree decl
= TYPE_STUB_DECL (node
);
11229 if (TYPE_NAME (node
))
11231 if (TREE_CODE (TYPE_NAME (node
)) == IDENTIFIER_NODE
)
11232 what
= TYPE_NAME (node
);
11233 else if (TREE_CODE (TYPE_NAME (node
)) == TYPE_DECL
11234 && DECL_NAME (TYPE_NAME (node
)))
11235 what
= DECL_NAME (TYPE_NAME (node
));
11240 expanded_location xloc
11241 = expand_location (DECL_SOURCE_LOCATION (decl
));
11245 warning (OPT_Wdeprecated_declarations
,
11246 "%qE is deprecated (declared at %s:%d): %s",
11247 what
, xloc
.file
, xloc
.line
, msg
);
11249 warning (OPT_Wdeprecated_declarations
,
11250 "%qE is deprecated (declared at %s:%d)", what
,
11251 xloc
.file
, xloc
.line
);
11256 warning (OPT_Wdeprecated_declarations
,
11257 "type is deprecated (declared at %s:%d): %s",
11258 xloc
.file
, xloc
.line
, msg
);
11260 warning (OPT_Wdeprecated_declarations
,
11261 "type is deprecated (declared at %s:%d)",
11262 xloc
.file
, xloc
.line
);
11270 warning (OPT_Wdeprecated_declarations
, "%qE is deprecated: %s",
11273 warning (OPT_Wdeprecated_declarations
, "%qE is deprecated", what
);
11278 warning (OPT_Wdeprecated_declarations
, "type is deprecated: %s",
11281 warning (OPT_Wdeprecated_declarations
, "type is deprecated");
11287 #include "gt-tree.h"