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 "langhooks.h"
48 #include "tree-inline.h"
49 #include "tree-iterator.h"
50 #include "basic-block.h"
51 #include "tree-flow.h"
53 #include "pointer-set.h"
54 #include "tree-pass.h"
55 #include "langhooks-def.h"
56 #include "diagnostic.h"
57 #include "tree-diagnostic.h"
58 #include "tree-pretty-print.h"
65 /* Tree code classes. */
67 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
68 #define END_OF_BASE_TREE_CODES tcc_exceptional,
70 const enum tree_code_class tree_code_type
[] = {
71 #include "all-tree.def"
75 #undef END_OF_BASE_TREE_CODES
77 /* Table indexed by tree code giving number of expression
78 operands beyond the fixed part of the node structure.
79 Not used for types or decls. */
81 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
82 #define END_OF_BASE_TREE_CODES 0,
84 const unsigned char tree_code_length
[] = {
85 #include "all-tree.def"
89 #undef END_OF_BASE_TREE_CODES
91 /* Names of tree components.
92 Used for printing out the tree and error messages. */
93 #define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
94 #define END_OF_BASE_TREE_CODES "@dummy",
96 const char *const tree_code_name
[] = {
97 #include "all-tree.def"
101 #undef END_OF_BASE_TREE_CODES
103 /* Each tree code class has an associated string representation.
104 These must correspond to the tree_code_class entries. */
106 const char *const tree_code_class_strings
[] =
121 /* obstack.[ch] explicitly declined to prototype this. */
122 extern int _obstack_allocated_p (struct obstack
*h
, void *obj
);
124 #ifdef GATHER_STATISTICS
125 /* Statistics-gathering stuff. */
127 static int tree_code_counts
[MAX_TREE_CODES
];
128 int tree_node_counts
[(int) all_kinds
];
129 int tree_node_sizes
[(int) all_kinds
];
131 /* Keep in sync with tree.h:enum tree_node_kind. */
132 static const char * const tree_node_kind_names
[] = {
150 #endif /* GATHER_STATISTICS */
152 /* Unique id for next decl created. */
153 static GTY(()) int next_decl_uid
;
154 /* Unique id for next type created. */
155 static GTY(()) int next_type_uid
= 1;
156 /* Unique id for next debug decl created. Use negative numbers,
157 to catch erroneous uses. */
158 static GTY(()) int next_debug_decl_uid
;
160 /* Since we cannot rehash a type after it is in the table, we have to
161 keep the hash code. */
163 struct GTY(()) type_hash
{
168 /* Initial size of the hash table (rounded to next prime). */
169 #define TYPE_HASH_INITIAL_SIZE 1000
171 /* Now here is the hash table. When recording a type, it is added to
172 the slot whose index is the hash code. Note that the hash table is
173 used for several kinds of types (function types, array types and
174 array index range types, for now). While all these live in the
175 same table, they are completely independent, and the hash code is
176 computed differently for each of these. */
178 static GTY ((if_marked ("type_hash_marked_p"), param_is (struct type_hash
)))
179 htab_t type_hash_table
;
181 /* Hash table and temporary node for larger integer const values. */
182 static GTY (()) tree int_cst_node
;
183 static GTY ((if_marked ("ggc_marked_p"), param_is (union tree_node
)))
184 htab_t int_cst_hash_table
;
186 /* Hash table for optimization flags and target option flags. Use the same
187 hash table for both sets of options. Nodes for building the current
188 optimization and target option nodes. The assumption is most of the time
189 the options created will already be in the hash table, so we avoid
190 allocating and freeing up a node repeatably. */
191 static GTY (()) tree cl_optimization_node
;
192 static GTY (()) tree cl_target_option_node
;
193 static GTY ((if_marked ("ggc_marked_p"), param_is (union tree_node
)))
194 htab_t cl_option_hash_table
;
196 /* General tree->tree mapping structure for use in hash tables. */
199 static GTY ((if_marked ("tree_decl_map_marked_p"), param_is (struct tree_decl_map
)))
200 htab_t debug_expr_for_decl
;
202 static GTY ((if_marked ("tree_decl_map_marked_p"), param_is (struct tree_decl_map
)))
203 htab_t value_expr_for_decl
;
205 static GTY ((if_marked ("tree_priority_map_marked_p"),
206 param_is (struct tree_priority_map
)))
207 htab_t init_priority_for_decl
;
209 static void set_type_quals (tree
, int);
210 static int type_hash_eq (const void *, const void *);
211 static hashval_t
type_hash_hash (const void *);
212 static hashval_t
int_cst_hash_hash (const void *);
213 static int int_cst_hash_eq (const void *, const void *);
214 static hashval_t
cl_option_hash_hash (const void *);
215 static int cl_option_hash_eq (const void *, const void *);
216 static void print_type_hash_statistics (void);
217 static void print_debug_expr_statistics (void);
218 static void print_value_expr_statistics (void);
219 static int type_hash_marked_p (const void *);
220 static unsigned int type_hash_list (const_tree
, hashval_t
);
221 static unsigned int attribute_hash_list (const_tree
, hashval_t
);
223 tree global_trees
[TI_MAX
];
224 tree integer_types
[itk_none
];
226 unsigned char tree_contains_struct
[MAX_TREE_CODES
][64];
228 /* Number of operands for each OpenMP clause. */
229 unsigned const char omp_clause_num_ops
[] =
231 0, /* OMP_CLAUSE_ERROR */
232 1, /* OMP_CLAUSE_PRIVATE */
233 1, /* OMP_CLAUSE_SHARED */
234 1, /* OMP_CLAUSE_FIRSTPRIVATE */
235 2, /* OMP_CLAUSE_LASTPRIVATE */
236 4, /* OMP_CLAUSE_REDUCTION */
237 1, /* OMP_CLAUSE_COPYIN */
238 1, /* OMP_CLAUSE_COPYPRIVATE */
239 1, /* OMP_CLAUSE_IF */
240 1, /* OMP_CLAUSE_NUM_THREADS */
241 1, /* OMP_CLAUSE_SCHEDULE */
242 0, /* OMP_CLAUSE_NOWAIT */
243 0, /* OMP_CLAUSE_ORDERED */
244 0, /* OMP_CLAUSE_DEFAULT */
245 3, /* OMP_CLAUSE_COLLAPSE */
246 0 /* OMP_CLAUSE_UNTIED */
249 const char * const omp_clause_code_name
[] =
270 /* Return the tree node structure used by tree code CODE. */
272 static inline enum tree_node_structure_enum
273 tree_node_structure_for_code (enum tree_code code
)
275 switch (TREE_CODE_CLASS (code
))
277 case tcc_declaration
:
282 return TS_FIELD_DECL
;
288 return TS_LABEL_DECL
;
290 return TS_RESULT_DECL
;
291 case DEBUG_EXPR_DECL
:
294 return TS_CONST_DECL
;
298 return TS_FUNCTION_DECL
;
299 case TRANSLATION_UNIT_DECL
:
300 return TS_TRANSLATION_UNIT_DECL
;
302 return TS_DECL_NON_COMMON
;
315 default: /* tcc_constant and tcc_exceptional */
320 /* tcc_constant cases. */
321 case INTEGER_CST
: return TS_INT_CST
;
322 case REAL_CST
: return TS_REAL_CST
;
323 case FIXED_CST
: return TS_FIXED_CST
;
324 case COMPLEX_CST
: return TS_COMPLEX
;
325 case VECTOR_CST
: return TS_VECTOR
;
326 case STRING_CST
: return TS_STRING
;
327 /* tcc_exceptional cases. */
328 case ERROR_MARK
: return TS_COMMON
;
329 case IDENTIFIER_NODE
: return TS_IDENTIFIER
;
330 case TREE_LIST
: return TS_LIST
;
331 case TREE_VEC
: return TS_VEC
;
332 case SSA_NAME
: return TS_SSA_NAME
;
333 case PLACEHOLDER_EXPR
: return TS_COMMON
;
334 case STATEMENT_LIST
: return TS_STATEMENT_LIST
;
335 case BLOCK
: return TS_BLOCK
;
336 case CONSTRUCTOR
: return TS_CONSTRUCTOR
;
337 case TREE_BINFO
: return TS_BINFO
;
338 case OMP_CLAUSE
: return TS_OMP_CLAUSE
;
339 case OPTIMIZATION_NODE
: return TS_OPTIMIZATION
;
340 case TARGET_OPTION_NODE
: return TS_TARGET_OPTION
;
348 /* Initialize tree_contains_struct to describe the hierarchy of tree
352 initialize_tree_contains_struct (void)
356 for (i
= ERROR_MARK
; i
< LAST_AND_UNUSED_TREE_CODE
; i
++)
359 enum tree_node_structure_enum ts_code
;
361 code
= (enum tree_code
) i
;
362 ts_code
= tree_node_structure_for_code (code
);
364 /* Mark the TS structure itself. */
365 tree_contains_struct
[code
][ts_code
] = 1;
367 /* Mark all the structures that TS is derived from. */
383 MARK_TS_TYPED (code
);
387 case TS_DECL_MINIMAL
:
394 case TS_STATEMENT_LIST
:
396 case TS_OPTIMIZATION
:
397 case TS_TARGET_OPTION
:
398 MARK_TS_COMMON (code
);
402 MARK_TS_DECL_MINIMAL (code
);
407 MARK_TS_DECL_COMMON (code
);
410 case TS_DECL_NON_COMMON
:
411 MARK_TS_DECL_WITH_VIS (code
);
414 case TS_DECL_WITH_VIS
:
418 MARK_TS_DECL_WRTL (code
);
422 MARK_TS_DECL_COMMON (code
);
426 MARK_TS_DECL_WITH_VIS (code
);
430 case TS_FUNCTION_DECL
:
431 MARK_TS_DECL_NON_COMMON (code
);
434 case TS_TRANSLATION_UNIT_DECL
:
435 MARK_TS_DECL_COMMON (code
);
443 /* Basic consistency checks for attributes used in fold. */
444 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_NON_COMMON
]);
445 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_NON_COMMON
]);
446 gcc_assert (tree_contains_struct
[CONST_DECL
][TS_DECL_COMMON
]);
447 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_COMMON
]);
448 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_DECL_COMMON
]);
449 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_DECL_COMMON
]);
450 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_COMMON
]);
451 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_COMMON
]);
452 gcc_assert (tree_contains_struct
[TRANSLATION_UNIT_DECL
][TS_DECL_COMMON
]);
453 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_DECL_COMMON
]);
454 gcc_assert (tree_contains_struct
[FIELD_DECL
][TS_DECL_COMMON
]);
455 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_WRTL
]);
456 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_DECL_WRTL
]);
457 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_DECL_WRTL
]);
458 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_WRTL
]);
459 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_DECL_WRTL
]);
460 gcc_assert (tree_contains_struct
[CONST_DECL
][TS_DECL_MINIMAL
]);
461 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_MINIMAL
]);
462 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_DECL_MINIMAL
]);
463 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_DECL_MINIMAL
]);
464 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_MINIMAL
]);
465 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_MINIMAL
]);
466 gcc_assert (tree_contains_struct
[TRANSLATION_UNIT_DECL
][TS_DECL_MINIMAL
]);
467 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_DECL_MINIMAL
]);
468 gcc_assert (tree_contains_struct
[FIELD_DECL
][TS_DECL_MINIMAL
]);
469 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_WITH_VIS
]);
470 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_WITH_VIS
]);
471 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_WITH_VIS
]);
472 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_VAR_DECL
]);
473 gcc_assert (tree_contains_struct
[FIELD_DECL
][TS_FIELD_DECL
]);
474 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_PARM_DECL
]);
475 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_LABEL_DECL
]);
476 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_RESULT_DECL
]);
477 gcc_assert (tree_contains_struct
[CONST_DECL
][TS_CONST_DECL
]);
478 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_TYPE_DECL
]);
479 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_FUNCTION_DECL
]);
480 gcc_assert (tree_contains_struct
[IMPORTED_DECL
][TS_DECL_MINIMAL
]);
481 gcc_assert (tree_contains_struct
[IMPORTED_DECL
][TS_DECL_COMMON
]);
490 /* Initialize the hash table of types. */
491 type_hash_table
= htab_create_ggc (TYPE_HASH_INITIAL_SIZE
, type_hash_hash
,
494 debug_expr_for_decl
= htab_create_ggc (512, tree_decl_map_hash
,
495 tree_decl_map_eq
, 0);
497 value_expr_for_decl
= htab_create_ggc (512, tree_decl_map_hash
,
498 tree_decl_map_eq
, 0);
499 init_priority_for_decl
= htab_create_ggc (512, tree_priority_map_hash
,
500 tree_priority_map_eq
, 0);
502 int_cst_hash_table
= htab_create_ggc (1024, int_cst_hash_hash
,
503 int_cst_hash_eq
, NULL
);
505 int_cst_node
= make_node (INTEGER_CST
);
507 cl_option_hash_table
= htab_create_ggc (64, cl_option_hash_hash
,
508 cl_option_hash_eq
, NULL
);
510 cl_optimization_node
= make_node (OPTIMIZATION_NODE
);
511 cl_target_option_node
= make_node (TARGET_OPTION_NODE
);
513 /* Initialize the tree_contains_struct array. */
514 initialize_tree_contains_struct ();
515 lang_hooks
.init_ts ();
519 /* The name of the object as the assembler will see it (but before any
520 translations made by ASM_OUTPUT_LABELREF). Often this is the same
521 as DECL_NAME. It is an IDENTIFIER_NODE. */
523 decl_assembler_name (tree decl
)
525 if (!DECL_ASSEMBLER_NAME_SET_P (decl
))
526 lang_hooks
.set_decl_assembler_name (decl
);
527 return DECL_WITH_VIS_CHECK (decl
)->decl_with_vis
.assembler_name
;
530 /* Compare ASMNAME with the DECL_ASSEMBLER_NAME of DECL. */
533 decl_assembler_name_equal (tree decl
, const_tree asmname
)
535 tree decl_asmname
= DECL_ASSEMBLER_NAME (decl
);
536 const char *decl_str
;
537 const char *asmname_str
;
540 if (decl_asmname
== asmname
)
543 decl_str
= IDENTIFIER_POINTER (decl_asmname
);
544 asmname_str
= IDENTIFIER_POINTER (asmname
);
547 /* If the target assembler name was set by the user, things are trickier.
548 We have a leading '*' to begin with. After that, it's arguable what
549 is the correct thing to do with -fleading-underscore. Arguably, we've
550 historically been doing the wrong thing in assemble_alias by always
551 printing the leading underscore. Since we're not changing that, make
552 sure user_label_prefix follows the '*' before matching. */
553 if (decl_str
[0] == '*')
555 size_t ulp_len
= strlen (user_label_prefix
);
561 else if (strncmp (decl_str
, user_label_prefix
, ulp_len
) == 0)
562 decl_str
+= ulp_len
, test
=true;
566 if (asmname_str
[0] == '*')
568 size_t ulp_len
= strlen (user_label_prefix
);
574 else if (strncmp (asmname_str
, user_label_prefix
, ulp_len
) == 0)
575 asmname_str
+= ulp_len
, test
=true;
582 return strcmp (decl_str
, asmname_str
) == 0;
585 /* Hash asmnames ignoring the user specified marks. */
588 decl_assembler_name_hash (const_tree asmname
)
590 if (IDENTIFIER_POINTER (asmname
)[0] == '*')
592 const char *decl_str
= IDENTIFIER_POINTER (asmname
) + 1;
593 size_t ulp_len
= strlen (user_label_prefix
);
597 else if (strncmp (decl_str
, user_label_prefix
, ulp_len
) == 0)
600 return htab_hash_string (decl_str
);
603 return htab_hash_string (IDENTIFIER_POINTER (asmname
));
606 /* Compute the number of bytes occupied by a tree with code CODE.
607 This function cannot be used for nodes that have variable sizes,
608 including TREE_VEC, STRING_CST, and CALL_EXPR. */
610 tree_code_size (enum tree_code code
)
612 switch (TREE_CODE_CLASS (code
))
614 case tcc_declaration
: /* A decl node */
619 return sizeof (struct tree_field_decl
);
621 return sizeof (struct tree_parm_decl
);
623 return sizeof (struct tree_var_decl
);
625 return sizeof (struct tree_label_decl
);
627 return sizeof (struct tree_result_decl
);
629 return sizeof (struct tree_const_decl
);
631 return sizeof (struct tree_type_decl
);
633 return sizeof (struct tree_function_decl
);
634 case DEBUG_EXPR_DECL
:
635 return sizeof (struct tree_decl_with_rtl
);
637 return sizeof (struct tree_decl_non_common
);
641 case tcc_type
: /* a type node */
642 return sizeof (struct tree_type
);
644 case tcc_reference
: /* a reference */
645 case tcc_expression
: /* an expression */
646 case tcc_statement
: /* an expression with side effects */
647 case tcc_comparison
: /* a comparison expression */
648 case tcc_unary
: /* a unary arithmetic expression */
649 case tcc_binary
: /* a binary arithmetic expression */
650 return (sizeof (struct tree_exp
)
651 + (TREE_CODE_LENGTH (code
) - 1) * sizeof (tree
));
653 case tcc_constant
: /* a constant */
656 case INTEGER_CST
: return sizeof (struct tree_int_cst
);
657 case REAL_CST
: return sizeof (struct tree_real_cst
);
658 case FIXED_CST
: return sizeof (struct tree_fixed_cst
);
659 case COMPLEX_CST
: return sizeof (struct tree_complex
);
660 case VECTOR_CST
: return sizeof (struct tree_vector
);
661 case STRING_CST
: gcc_unreachable ();
663 return lang_hooks
.tree_size (code
);
666 case tcc_exceptional
: /* something random, like an identifier. */
669 case IDENTIFIER_NODE
: return lang_hooks
.identifier_size
;
670 case TREE_LIST
: return sizeof (struct tree_list
);
673 case PLACEHOLDER_EXPR
: return sizeof (struct tree_common
);
676 case OMP_CLAUSE
: gcc_unreachable ();
678 case SSA_NAME
: return sizeof (struct tree_ssa_name
);
680 case STATEMENT_LIST
: return sizeof (struct tree_statement_list
);
681 case BLOCK
: return sizeof (struct tree_block
);
682 case CONSTRUCTOR
: return sizeof (struct tree_constructor
);
683 case OPTIMIZATION_NODE
: return sizeof (struct tree_optimization_option
);
684 case TARGET_OPTION_NODE
: return sizeof (struct tree_target_option
);
687 return lang_hooks
.tree_size (code
);
695 /* Compute the number of bytes occupied by NODE. This routine only
696 looks at TREE_CODE, except for those nodes that have variable sizes. */
698 tree_size (const_tree node
)
700 const enum tree_code code
= TREE_CODE (node
);
704 return (offsetof (struct tree_binfo
, base_binfos
)
705 + VEC_embedded_size (tree
, BINFO_N_BASE_BINFOS (node
)));
708 return (sizeof (struct tree_vec
)
709 + (TREE_VEC_LENGTH (node
) - 1) * sizeof (tree
));
712 return TREE_STRING_LENGTH (node
) + offsetof (struct tree_string
, str
) + 1;
715 return (sizeof (struct tree_omp_clause
)
716 + (omp_clause_num_ops
[OMP_CLAUSE_CODE (node
)] - 1)
720 if (TREE_CODE_CLASS (code
) == tcc_vl_exp
)
721 return (sizeof (struct tree_exp
)
722 + (VL_EXP_OPERAND_LENGTH (node
) - 1) * sizeof (tree
));
724 return tree_code_size (code
);
728 /* Record interesting allocation statistics for a tree node with CODE
732 record_node_allocation_statistics (enum tree_code code ATTRIBUTE_UNUSED
,
733 size_t length ATTRIBUTE_UNUSED
)
735 #ifdef GATHER_STATISTICS
736 enum tree_code_class type
= TREE_CODE_CLASS (code
);
741 case tcc_declaration
: /* A decl node */
745 case tcc_type
: /* a type node */
749 case tcc_statement
: /* an expression with side effects */
753 case tcc_reference
: /* a reference */
757 case tcc_expression
: /* an expression */
758 case tcc_comparison
: /* a comparison expression */
759 case tcc_unary
: /* a unary arithmetic expression */
760 case tcc_binary
: /* a binary arithmetic expression */
764 case tcc_constant
: /* a constant */
768 case tcc_exceptional
: /* something random, like an identifier. */
771 case IDENTIFIER_NODE
:
784 kind
= ssa_name_kind
;
796 kind
= omp_clause_kind
;
813 tree_code_counts
[(int) code
]++;
814 tree_node_counts
[(int) kind
]++;
815 tree_node_sizes
[(int) kind
] += length
;
819 /* Allocate and return a new UID from the DECL_UID namespace. */
822 allocate_decl_uid (void)
824 return next_decl_uid
++;
827 /* Return a newly allocated node of code CODE. For decl and type
828 nodes, some other fields are initialized. The rest of the node is
829 initialized to zero. This function cannot be used for TREE_VEC or
830 OMP_CLAUSE nodes, which is enforced by asserts in tree_code_size.
832 Achoo! I got a code in the node. */
835 make_node_stat (enum tree_code code MEM_STAT_DECL
)
838 enum tree_code_class type
= TREE_CODE_CLASS (code
);
839 size_t length
= tree_code_size (code
);
841 record_node_allocation_statistics (code
, length
);
843 t
= ggc_alloc_zone_cleared_tree_node_stat (
844 (code
== IDENTIFIER_NODE
) ? &tree_id_zone
: &tree_zone
,
845 length PASS_MEM_STAT
);
846 TREE_SET_CODE (t
, code
);
851 TREE_SIDE_EFFECTS (t
) = 1;
854 case tcc_declaration
:
855 if (CODE_CONTAINS_STRUCT (code
, TS_DECL_COMMON
))
857 if (code
== FUNCTION_DECL
)
859 DECL_ALIGN (t
) = FUNCTION_BOUNDARY
;
860 DECL_MODE (t
) = FUNCTION_MODE
;
865 DECL_SOURCE_LOCATION (t
) = input_location
;
866 if (TREE_CODE (t
) == DEBUG_EXPR_DECL
)
867 DECL_UID (t
) = --next_debug_decl_uid
;
870 DECL_UID (t
) = allocate_decl_uid ();
871 SET_DECL_PT_UID (t
, -1);
873 if (TREE_CODE (t
) == LABEL_DECL
)
874 LABEL_DECL_UID (t
) = -1;
879 TYPE_UID (t
) = next_type_uid
++;
880 TYPE_ALIGN (t
) = BITS_PER_UNIT
;
881 TYPE_USER_ALIGN (t
) = 0;
882 TYPE_MAIN_VARIANT (t
) = t
;
883 TYPE_CANONICAL (t
) = t
;
885 /* Default to no attributes for type, but let target change that. */
886 TYPE_ATTRIBUTES (t
) = NULL_TREE
;
887 targetm
.set_default_type_attributes (t
);
889 /* We have not yet computed the alias set for this type. */
890 TYPE_ALIAS_SET (t
) = -1;
894 TREE_CONSTANT (t
) = 1;
903 case PREDECREMENT_EXPR
:
904 case PREINCREMENT_EXPR
:
905 case POSTDECREMENT_EXPR
:
906 case POSTINCREMENT_EXPR
:
907 /* All of these have side-effects, no matter what their
909 TREE_SIDE_EFFECTS (t
) = 1;
918 /* Other classes need no special treatment. */
925 /* Return a new node with the same contents as NODE except that its
926 TREE_CHAIN, if it has one, is zero and it has a fresh uid. */
929 copy_node_stat (tree node MEM_STAT_DECL
)
932 enum tree_code code
= TREE_CODE (node
);
935 gcc_assert (code
!= STATEMENT_LIST
);
937 length
= tree_size (node
);
938 record_node_allocation_statistics (code
, length
);
939 t
= ggc_alloc_zone_tree_node_stat (&tree_zone
, length PASS_MEM_STAT
);
940 memcpy (t
, node
, length
);
942 if (CODE_CONTAINS_STRUCT (code
, TS_COMMON
))
944 TREE_ASM_WRITTEN (t
) = 0;
945 TREE_VISITED (t
) = 0;
946 if (code
== VAR_DECL
|| code
== PARM_DECL
|| code
== RESULT_DECL
)
947 *DECL_VAR_ANN_PTR (t
) = 0;
949 if (TREE_CODE_CLASS (code
) == tcc_declaration
)
951 if (code
== DEBUG_EXPR_DECL
)
952 DECL_UID (t
) = --next_debug_decl_uid
;
955 DECL_UID (t
) = allocate_decl_uid ();
956 if (DECL_PT_UID_SET_P (node
))
957 SET_DECL_PT_UID (t
, DECL_PT_UID (node
));
959 if ((TREE_CODE (node
) == PARM_DECL
|| TREE_CODE (node
) == VAR_DECL
)
960 && DECL_HAS_VALUE_EXPR_P (node
))
962 SET_DECL_VALUE_EXPR (t
, DECL_VALUE_EXPR (node
));
963 DECL_HAS_VALUE_EXPR_P (t
) = 1;
965 if (TREE_CODE (node
) == VAR_DECL
&& DECL_HAS_INIT_PRIORITY_P (node
))
967 SET_DECL_INIT_PRIORITY (t
, DECL_INIT_PRIORITY (node
));
968 DECL_HAS_INIT_PRIORITY_P (t
) = 1;
971 else if (TREE_CODE_CLASS (code
) == tcc_type
)
973 TYPE_UID (t
) = next_type_uid
++;
974 /* The following is so that the debug code for
975 the copy is different from the original type.
976 The two statements usually duplicate each other
977 (because they clear fields of the same union),
978 but the optimizer should catch that. */
979 TYPE_SYMTAB_POINTER (t
) = 0;
980 TYPE_SYMTAB_ADDRESS (t
) = 0;
982 /* Do not copy the values cache. */
983 if (TYPE_CACHED_VALUES_P(t
))
985 TYPE_CACHED_VALUES_P (t
) = 0;
986 TYPE_CACHED_VALUES (t
) = NULL_TREE
;
993 /* Return a copy of a chain of nodes, chained through the TREE_CHAIN field.
994 For example, this can copy a list made of TREE_LIST nodes. */
997 copy_list (tree list
)
1005 head
= prev
= copy_node (list
);
1006 next
= TREE_CHAIN (list
);
1009 TREE_CHAIN (prev
) = copy_node (next
);
1010 prev
= TREE_CHAIN (prev
);
1011 next
= TREE_CHAIN (next
);
1017 /* Create an INT_CST node with a LOW value sign extended to TYPE. */
1020 build_int_cst (tree type
, HOST_WIDE_INT low
)
1022 /* Support legacy code. */
1024 type
= integer_type_node
;
1026 return double_int_to_tree (type
, shwi_to_double_int (low
));
1029 /* Create an INT_CST node with a LOW value sign extended to TYPE. */
1032 build_int_cst_type (tree type
, HOST_WIDE_INT low
)
1036 return double_int_to_tree (type
, shwi_to_double_int (low
));
1039 /* Constructs tree in type TYPE from with value given by CST. Signedness
1040 of CST is assumed to be the same as the signedness of TYPE. */
1043 double_int_to_tree (tree type
, double_int cst
)
1045 /* Size types *are* sign extended. */
1046 bool sign_extended_type
= (!TYPE_UNSIGNED (type
)
1047 || (TREE_CODE (type
) == INTEGER_TYPE
1048 && TYPE_IS_SIZETYPE (type
)));
1050 cst
= double_int_ext (cst
, TYPE_PRECISION (type
), !sign_extended_type
);
1052 return build_int_cst_wide (type
, cst
.low
, cst
.high
);
1055 /* Returns true if CST fits into range of TYPE. Signedness of CST is assumed
1056 to be the same as the signedness of TYPE. */
1059 double_int_fits_to_tree_p (const_tree type
, double_int cst
)
1061 /* Size types *are* sign extended. */
1062 bool sign_extended_type
= (!TYPE_UNSIGNED (type
)
1063 || (TREE_CODE (type
) == INTEGER_TYPE
1064 && TYPE_IS_SIZETYPE (type
)));
1067 = double_int_ext (cst
, TYPE_PRECISION (type
), !sign_extended_type
);
1069 return double_int_equal_p (cst
, ext
);
1072 /* We force the double_int CST to the range of the type TYPE by sign or
1073 zero extending it. OVERFLOWABLE indicates if we are interested in
1074 overflow of the value, when >0 we are only interested in signed
1075 overflow, for <0 we are interested in any overflow. OVERFLOWED
1076 indicates whether overflow has already occurred. CONST_OVERFLOWED
1077 indicates whether constant overflow has already occurred. We force
1078 T's value to be within range of T's type (by setting to 0 or 1 all
1079 the bits outside the type's range). We set TREE_OVERFLOWED if,
1080 OVERFLOWED is nonzero,
1081 or OVERFLOWABLE is >0 and signed overflow occurs
1082 or OVERFLOWABLE is <0 and any overflow occurs
1083 We return a new tree node for the extended double_int. The node
1084 is shared if no overflow flags are set. */
1088 force_fit_type_double (tree type
, double_int cst
, int overflowable
,
1091 bool sign_extended_type
;
1093 /* Size types *are* sign extended. */
1094 sign_extended_type
= (!TYPE_UNSIGNED (type
)
1095 || (TREE_CODE (type
) == INTEGER_TYPE
1096 && TYPE_IS_SIZETYPE (type
)));
1098 /* If we need to set overflow flags, return a new unshared node. */
1099 if (overflowed
|| !double_int_fits_to_tree_p(type
, cst
))
1103 || (overflowable
> 0 && sign_extended_type
))
1105 tree t
= make_node (INTEGER_CST
);
1106 TREE_INT_CST (t
) = double_int_ext (cst
, TYPE_PRECISION (type
),
1107 !sign_extended_type
);
1108 TREE_TYPE (t
) = type
;
1109 TREE_OVERFLOW (t
) = 1;
1114 /* Else build a shared node. */
1115 return double_int_to_tree (type
, cst
);
1118 /* These are the hash table functions for the hash table of INTEGER_CST
1119 nodes of a sizetype. */
1121 /* Return the hash code code X, an INTEGER_CST. */
1124 int_cst_hash_hash (const void *x
)
1126 const_tree
const t
= (const_tree
) x
;
1128 return (TREE_INT_CST_HIGH (t
) ^ TREE_INT_CST_LOW (t
)
1129 ^ htab_hash_pointer (TREE_TYPE (t
)));
1132 /* Return nonzero if the value represented by *X (an INTEGER_CST tree node)
1133 is the same as that given by *Y, which is the same. */
1136 int_cst_hash_eq (const void *x
, const void *y
)
1138 const_tree
const xt
= (const_tree
) x
;
1139 const_tree
const yt
= (const_tree
) y
;
1141 return (TREE_TYPE (xt
) == TREE_TYPE (yt
)
1142 && TREE_INT_CST_HIGH (xt
) == TREE_INT_CST_HIGH (yt
)
1143 && TREE_INT_CST_LOW (xt
) == TREE_INT_CST_LOW (yt
));
1146 /* Create an INT_CST node of TYPE and value HI:LOW.
1147 The returned node is always shared. For small integers we use a
1148 per-type vector cache, for larger ones we use a single hash table. */
1151 build_int_cst_wide (tree type
, unsigned HOST_WIDE_INT low
, HOST_WIDE_INT hi
)
1159 switch (TREE_CODE (type
))
1162 gcc_assert (hi
== 0 && low
== 0);
1166 case REFERENCE_TYPE
:
1167 /* Cache NULL pointer. */
1176 /* Cache false or true. */
1184 if (TYPE_UNSIGNED (type
))
1187 limit
= INTEGER_SHARE_LIMIT
;
1188 if (!hi
&& low
< (unsigned HOST_WIDE_INT
)INTEGER_SHARE_LIMIT
)
1194 limit
= INTEGER_SHARE_LIMIT
+ 1;
1195 if (!hi
&& low
< (unsigned HOST_WIDE_INT
)INTEGER_SHARE_LIMIT
)
1197 else if (hi
== -1 && low
== -(unsigned HOST_WIDE_INT
)1)
1211 /* Look for it in the type's vector of small shared ints. */
1212 if (!TYPE_CACHED_VALUES_P (type
))
1214 TYPE_CACHED_VALUES_P (type
) = 1;
1215 TYPE_CACHED_VALUES (type
) = make_tree_vec (limit
);
1218 t
= TREE_VEC_ELT (TYPE_CACHED_VALUES (type
), ix
);
1221 /* Make sure no one is clobbering the shared constant. */
1222 gcc_assert (TREE_TYPE (t
) == type
);
1223 gcc_assert (TREE_INT_CST_LOW (t
) == low
);
1224 gcc_assert (TREE_INT_CST_HIGH (t
) == hi
);
1228 /* Create a new shared int. */
1229 t
= make_node (INTEGER_CST
);
1231 TREE_INT_CST_LOW (t
) = low
;
1232 TREE_INT_CST_HIGH (t
) = hi
;
1233 TREE_TYPE (t
) = type
;
1235 TREE_VEC_ELT (TYPE_CACHED_VALUES (type
), ix
) = t
;
1240 /* Use the cache of larger shared ints. */
1243 TREE_INT_CST_LOW (int_cst_node
) = low
;
1244 TREE_INT_CST_HIGH (int_cst_node
) = hi
;
1245 TREE_TYPE (int_cst_node
) = type
;
1247 slot
= htab_find_slot (int_cst_hash_table
, int_cst_node
, INSERT
);
1251 /* Insert this one into the hash table. */
1254 /* Make a new node for next time round. */
1255 int_cst_node
= make_node (INTEGER_CST
);
1262 /* Builds an integer constant in TYPE such that lowest BITS bits are ones
1263 and the rest are zeros. */
1266 build_low_bits_mask (tree type
, unsigned bits
)
1270 gcc_assert (bits
<= TYPE_PRECISION (type
));
1272 if (bits
== TYPE_PRECISION (type
)
1273 && !TYPE_UNSIGNED (type
))
1274 /* Sign extended all-ones mask. */
1275 mask
= double_int_minus_one
;
1277 mask
= double_int_mask (bits
);
1279 return build_int_cst_wide (type
, mask
.low
, mask
.high
);
1282 /* Checks that X is integer constant that can be expressed in (unsigned)
1283 HOST_WIDE_INT without loss of precision. */
1286 cst_and_fits_in_hwi (const_tree x
)
1288 if (TREE_CODE (x
) != INTEGER_CST
)
1291 if (TYPE_PRECISION (TREE_TYPE (x
)) > HOST_BITS_PER_WIDE_INT
)
1294 return (TREE_INT_CST_HIGH (x
) == 0
1295 || TREE_INT_CST_HIGH (x
) == -1);
1298 /* Return a new VECTOR_CST node whose type is TYPE and whose values
1299 are in a list pointed to by VALS. */
1302 build_vector (tree type
, tree vals
)
1304 tree v
= make_node (VECTOR_CST
);
1309 TREE_VECTOR_CST_ELTS (v
) = vals
;
1310 TREE_TYPE (v
) = type
;
1312 /* Iterate through elements and check for overflow. */
1313 for (link
= vals
; link
; link
= TREE_CHAIN (link
))
1315 tree value
= TREE_VALUE (link
);
1318 /* Don't crash if we get an address constant. */
1319 if (!CONSTANT_CLASS_P (value
))
1322 over
|= TREE_OVERFLOW (value
);
1325 gcc_assert (cnt
== TYPE_VECTOR_SUBPARTS (type
));
1327 TREE_OVERFLOW (v
) = over
;
1331 /* Return a new VECTOR_CST node whose type is TYPE and whose values
1332 are extracted from V, a vector of CONSTRUCTOR_ELT. */
1335 build_vector_from_ctor (tree type
, VEC(constructor_elt
,gc
) *v
)
1337 tree list
= NULL_TREE
;
1338 unsigned HOST_WIDE_INT idx
;
1341 FOR_EACH_CONSTRUCTOR_VALUE (v
, idx
, value
)
1342 list
= tree_cons (NULL_TREE
, value
, list
);
1343 for (; idx
< TYPE_VECTOR_SUBPARTS (type
); ++idx
)
1344 list
= tree_cons (NULL_TREE
,
1345 build_zero_cst (TREE_TYPE (type
)), list
);
1346 return build_vector (type
, nreverse (list
));
1349 /* Build a vector of type VECTYPE where all the elements are SCs. */
1351 build_vector_from_val (tree vectype
, tree sc
)
1353 int i
, nunits
= TYPE_VECTOR_SUBPARTS (vectype
);
1354 VEC(constructor_elt
, gc
) *v
= NULL
;
1356 if (sc
== error_mark_node
)
1359 /* Verify that the vector type is suitable for SC. Note that there
1360 is some inconsistency in the type-system with respect to restrict
1361 qualifications of pointers. Vector types always have a main-variant
1362 element type and the qualification is applied to the vector-type.
1363 So TREE_TYPE (vector-type) does not return a properly qualified
1364 vector element-type. */
1365 gcc_checking_assert (types_compatible_p (TYPE_MAIN_VARIANT (TREE_TYPE (sc
)),
1366 TREE_TYPE (vectype
)));
1368 v
= VEC_alloc (constructor_elt
, gc
, nunits
);
1369 for (i
= 0; i
< nunits
; ++i
)
1370 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, sc
);
1372 if (CONSTANT_CLASS_P (sc
))
1373 return build_vector_from_ctor (vectype
, v
);
1375 return build_constructor (vectype
, v
);
1378 /* Return a new CONSTRUCTOR node whose type is TYPE and whose values
1379 are in the VEC pointed to by VALS. */
1381 build_constructor (tree type
, VEC(constructor_elt
,gc
) *vals
)
1383 tree c
= make_node (CONSTRUCTOR
);
1385 constructor_elt
*elt
;
1386 bool constant_p
= true;
1388 TREE_TYPE (c
) = type
;
1389 CONSTRUCTOR_ELTS (c
) = vals
;
1391 FOR_EACH_VEC_ELT (constructor_elt
, vals
, i
, elt
)
1392 if (!TREE_CONSTANT (elt
->value
))
1398 TREE_CONSTANT (c
) = constant_p
;
1403 /* Build a CONSTRUCTOR node made of a single initializer, with the specified
1406 build_constructor_single (tree type
, tree index
, tree value
)
1408 VEC(constructor_elt
,gc
) *v
;
1409 constructor_elt
*elt
;
1411 v
= VEC_alloc (constructor_elt
, gc
, 1);
1412 elt
= VEC_quick_push (constructor_elt
, v
, NULL
);
1416 return build_constructor (type
, v
);
1420 /* Return a new CONSTRUCTOR node whose type is TYPE and whose values
1421 are in a list pointed to by VALS. */
1423 build_constructor_from_list (tree type
, tree vals
)
1426 VEC(constructor_elt
,gc
) *v
= NULL
;
1430 v
= VEC_alloc (constructor_elt
, gc
, list_length (vals
));
1431 for (t
= vals
; t
; t
= TREE_CHAIN (t
))
1432 CONSTRUCTOR_APPEND_ELT (v
, TREE_PURPOSE (t
), TREE_VALUE (t
));
1435 return build_constructor (type
, v
);
1438 /* Return a new FIXED_CST node whose type is TYPE and value is F. */
1441 build_fixed (tree type
, FIXED_VALUE_TYPE f
)
1444 FIXED_VALUE_TYPE
*fp
;
1446 v
= make_node (FIXED_CST
);
1447 fp
= ggc_alloc_fixed_value ();
1448 memcpy (fp
, &f
, sizeof (FIXED_VALUE_TYPE
));
1450 TREE_TYPE (v
) = type
;
1451 TREE_FIXED_CST_PTR (v
) = fp
;
1455 /* Return a new REAL_CST node whose type is TYPE and value is D. */
1458 build_real (tree type
, REAL_VALUE_TYPE d
)
1461 REAL_VALUE_TYPE
*dp
;
1464 /* ??? Used to check for overflow here via CHECK_FLOAT_TYPE.
1465 Consider doing it via real_convert now. */
1467 v
= make_node (REAL_CST
);
1468 dp
= ggc_alloc_real_value ();
1469 memcpy (dp
, &d
, sizeof (REAL_VALUE_TYPE
));
1471 TREE_TYPE (v
) = type
;
1472 TREE_REAL_CST_PTR (v
) = dp
;
1473 TREE_OVERFLOW (v
) = overflow
;
1477 /* Return a new REAL_CST node whose type is TYPE
1478 and whose value is the integer value of the INTEGER_CST node I. */
1481 real_value_from_int_cst (const_tree type
, const_tree i
)
1485 /* Clear all bits of the real value type so that we can later do
1486 bitwise comparisons to see if two values are the same. */
1487 memset (&d
, 0, sizeof d
);
1489 real_from_integer (&d
, type
? TYPE_MODE (type
) : VOIDmode
,
1490 TREE_INT_CST_LOW (i
), TREE_INT_CST_HIGH (i
),
1491 TYPE_UNSIGNED (TREE_TYPE (i
)));
1495 /* Given a tree representing an integer constant I, return a tree
1496 representing the same value as a floating-point constant of type TYPE. */
1499 build_real_from_int_cst (tree type
, const_tree i
)
1502 int overflow
= TREE_OVERFLOW (i
);
1504 v
= build_real (type
, real_value_from_int_cst (type
, i
));
1506 TREE_OVERFLOW (v
) |= overflow
;
1510 /* Return a newly constructed STRING_CST node whose value is
1511 the LEN characters at STR.
1512 The TREE_TYPE is not initialized. */
1515 build_string (int len
, const char *str
)
1520 /* Do not waste bytes provided by padding of struct tree_string. */
1521 length
= len
+ offsetof (struct tree_string
, str
) + 1;
1523 record_node_allocation_statistics (STRING_CST
, length
);
1525 s
= ggc_alloc_tree_node (length
);
1527 memset (s
, 0, sizeof (struct tree_typed
));
1528 TREE_SET_CODE (s
, STRING_CST
);
1529 TREE_CONSTANT (s
) = 1;
1530 TREE_STRING_LENGTH (s
) = len
;
1531 memcpy (s
->string
.str
, str
, len
);
1532 s
->string
.str
[len
] = '\0';
1537 /* Return a newly constructed COMPLEX_CST node whose value is
1538 specified by the real and imaginary parts REAL and IMAG.
1539 Both REAL and IMAG should be constant nodes. TYPE, if specified,
1540 will be the type of the COMPLEX_CST; otherwise a new type will be made. */
1543 build_complex (tree type
, tree real
, tree imag
)
1545 tree t
= make_node (COMPLEX_CST
);
1547 TREE_REALPART (t
) = real
;
1548 TREE_IMAGPART (t
) = imag
;
1549 TREE_TYPE (t
) = type
? type
: build_complex_type (TREE_TYPE (real
));
1550 TREE_OVERFLOW (t
) = TREE_OVERFLOW (real
) | TREE_OVERFLOW (imag
);
1554 /* Return a constant of arithmetic type TYPE which is the
1555 multiplicative identity of the set TYPE. */
1558 build_one_cst (tree type
)
1560 switch (TREE_CODE (type
))
1562 case INTEGER_TYPE
: case ENUMERAL_TYPE
: case BOOLEAN_TYPE
:
1563 case POINTER_TYPE
: case REFERENCE_TYPE
:
1565 return build_int_cst (type
, 1);
1568 return build_real (type
, dconst1
);
1570 case FIXED_POINT_TYPE
:
1571 /* We can only generate 1 for accum types. */
1572 gcc_assert (ALL_SCALAR_ACCUM_MODE_P (TYPE_MODE (type
)));
1573 return build_fixed (type
, FCONST1(TYPE_MODE (type
)));
1577 tree scalar
= build_one_cst (TREE_TYPE (type
));
1579 return build_vector_from_val (type
, scalar
);
1583 return build_complex (type
,
1584 build_one_cst (TREE_TYPE (type
)),
1585 build_zero_cst (TREE_TYPE (type
)));
1592 /* Build 0 constant of type TYPE. This is used by constructor folding
1593 and thus the constant should be represented in memory by
1597 build_zero_cst (tree type
)
1599 switch (TREE_CODE (type
))
1601 case INTEGER_TYPE
: case ENUMERAL_TYPE
: case BOOLEAN_TYPE
:
1602 case POINTER_TYPE
: case REFERENCE_TYPE
:
1604 return build_int_cst (type
, 0);
1607 return build_real (type
, dconst0
);
1609 case FIXED_POINT_TYPE
:
1610 return build_fixed (type
, FCONST0 (TYPE_MODE (type
)));
1614 tree scalar
= build_zero_cst (TREE_TYPE (type
));
1616 return build_vector_from_val (type
, scalar
);
1621 tree zero
= build_zero_cst (TREE_TYPE (type
));
1623 return build_complex (type
, zero
, zero
);
1627 if (!AGGREGATE_TYPE_P (type
))
1628 return fold_convert (type
, integer_zero_node
);
1629 return build_constructor (type
, NULL
);
1634 /* Build a BINFO with LEN language slots. */
1637 make_tree_binfo_stat (unsigned base_binfos MEM_STAT_DECL
)
1640 size_t length
= (offsetof (struct tree_binfo
, base_binfos
)
1641 + VEC_embedded_size (tree
, base_binfos
));
1643 record_node_allocation_statistics (TREE_BINFO
, length
);
1645 t
= ggc_alloc_zone_tree_node_stat (&tree_zone
, length PASS_MEM_STAT
);
1647 memset (t
, 0, offsetof (struct tree_binfo
, base_binfos
));
1649 TREE_SET_CODE (t
, TREE_BINFO
);
1651 VEC_embedded_init (tree
, BINFO_BASE_BINFOS (t
), base_binfos
);
1657 /* Build a newly constructed TREE_VEC node of length LEN. */
1660 make_tree_vec_stat (int len MEM_STAT_DECL
)
1663 int length
= (len
- 1) * sizeof (tree
) + sizeof (struct tree_vec
);
1665 record_node_allocation_statistics (TREE_VEC
, length
);
1667 t
= ggc_alloc_zone_cleared_tree_node_stat (&tree_zone
, length PASS_MEM_STAT
);
1669 TREE_SET_CODE (t
, TREE_VEC
);
1670 TREE_VEC_LENGTH (t
) = len
;
1675 /* Return 1 if EXPR is the integer constant zero or a complex constant
1679 integer_zerop (const_tree expr
)
1683 return ((TREE_CODE (expr
) == INTEGER_CST
1684 && TREE_INT_CST_LOW (expr
) == 0
1685 && TREE_INT_CST_HIGH (expr
) == 0)
1686 || (TREE_CODE (expr
) == COMPLEX_CST
1687 && integer_zerop (TREE_REALPART (expr
))
1688 && integer_zerop (TREE_IMAGPART (expr
))));
1691 /* Return 1 if EXPR is the integer constant one or the corresponding
1692 complex constant. */
1695 integer_onep (const_tree expr
)
1699 return ((TREE_CODE (expr
) == INTEGER_CST
1700 && TREE_INT_CST_LOW (expr
) == 1
1701 && TREE_INT_CST_HIGH (expr
) == 0)
1702 || (TREE_CODE (expr
) == COMPLEX_CST
1703 && integer_onep (TREE_REALPART (expr
))
1704 && integer_zerop (TREE_IMAGPART (expr
))));
1707 /* Return 1 if EXPR is an integer containing all 1's in as much precision as
1708 it contains. Likewise for the corresponding complex constant. */
1711 integer_all_onesp (const_tree expr
)
1718 if (TREE_CODE (expr
) == COMPLEX_CST
1719 && integer_all_onesp (TREE_REALPART (expr
))
1720 && integer_zerop (TREE_IMAGPART (expr
)))
1723 else if (TREE_CODE (expr
) != INTEGER_CST
)
1726 uns
= TYPE_UNSIGNED (TREE_TYPE (expr
));
1727 if (TREE_INT_CST_LOW (expr
) == ~(unsigned HOST_WIDE_INT
) 0
1728 && TREE_INT_CST_HIGH (expr
) == -1)
1733 /* Note that using TYPE_PRECISION here is wrong. We care about the
1734 actual bits, not the (arbitrary) range of the type. */
1735 prec
= GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (expr
)));
1736 if (prec
>= HOST_BITS_PER_WIDE_INT
)
1738 HOST_WIDE_INT high_value
;
1741 shift_amount
= prec
- HOST_BITS_PER_WIDE_INT
;
1743 /* Can not handle precisions greater than twice the host int size. */
1744 gcc_assert (shift_amount
<= HOST_BITS_PER_WIDE_INT
);
1745 if (shift_amount
== HOST_BITS_PER_WIDE_INT
)
1746 /* Shifting by the host word size is undefined according to the ANSI
1747 standard, so we must handle this as a special case. */
1750 high_value
= ((HOST_WIDE_INT
) 1 << shift_amount
) - 1;
1752 return (TREE_INT_CST_LOW (expr
) == ~(unsigned HOST_WIDE_INT
) 0
1753 && TREE_INT_CST_HIGH (expr
) == high_value
);
1756 return TREE_INT_CST_LOW (expr
) == ((unsigned HOST_WIDE_INT
) 1 << prec
) - 1;
1759 /* Return 1 if EXPR is an integer constant that is a power of 2 (i.e., has only
1763 integer_pow2p (const_tree expr
)
1766 HOST_WIDE_INT high
, low
;
1770 if (TREE_CODE (expr
) == COMPLEX_CST
1771 && integer_pow2p (TREE_REALPART (expr
))
1772 && integer_zerop (TREE_IMAGPART (expr
)))
1775 if (TREE_CODE (expr
) != INTEGER_CST
)
1778 prec
= TYPE_PRECISION (TREE_TYPE (expr
));
1779 high
= TREE_INT_CST_HIGH (expr
);
1780 low
= TREE_INT_CST_LOW (expr
);
1782 /* First clear all bits that are beyond the type's precision in case
1783 we've been sign extended. */
1785 if (prec
== 2 * HOST_BITS_PER_WIDE_INT
)
1787 else if (prec
> HOST_BITS_PER_WIDE_INT
)
1788 high
&= ~((HOST_WIDE_INT
) (-1) << (prec
- HOST_BITS_PER_WIDE_INT
));
1792 if (prec
< HOST_BITS_PER_WIDE_INT
)
1793 low
&= ~((HOST_WIDE_INT
) (-1) << prec
);
1796 if (high
== 0 && low
== 0)
1799 return ((high
== 0 && (low
& (low
- 1)) == 0)
1800 || (low
== 0 && (high
& (high
- 1)) == 0));
1803 /* Return 1 if EXPR is an integer constant other than zero or a
1804 complex constant other than zero. */
1807 integer_nonzerop (const_tree expr
)
1811 return ((TREE_CODE (expr
) == INTEGER_CST
1812 && (TREE_INT_CST_LOW (expr
) != 0
1813 || TREE_INT_CST_HIGH (expr
) != 0))
1814 || (TREE_CODE (expr
) == COMPLEX_CST
1815 && (integer_nonzerop (TREE_REALPART (expr
))
1816 || integer_nonzerop (TREE_IMAGPART (expr
)))));
1819 /* Return 1 if EXPR is the fixed-point constant zero. */
1822 fixed_zerop (const_tree expr
)
1824 return (TREE_CODE (expr
) == FIXED_CST
1825 && double_int_zero_p (TREE_FIXED_CST (expr
).data
));
1828 /* Return the power of two represented by a tree node known to be a
1832 tree_log2 (const_tree expr
)
1835 HOST_WIDE_INT high
, low
;
1839 if (TREE_CODE (expr
) == COMPLEX_CST
)
1840 return tree_log2 (TREE_REALPART (expr
));
1842 prec
= TYPE_PRECISION (TREE_TYPE (expr
));
1843 high
= TREE_INT_CST_HIGH (expr
);
1844 low
= TREE_INT_CST_LOW (expr
);
1846 /* First clear all bits that are beyond the type's precision in case
1847 we've been sign extended. */
1849 if (prec
== 2 * HOST_BITS_PER_WIDE_INT
)
1851 else if (prec
> HOST_BITS_PER_WIDE_INT
)
1852 high
&= ~((HOST_WIDE_INT
) (-1) << (prec
- HOST_BITS_PER_WIDE_INT
));
1856 if (prec
< HOST_BITS_PER_WIDE_INT
)
1857 low
&= ~((HOST_WIDE_INT
) (-1) << prec
);
1860 return (high
!= 0 ? HOST_BITS_PER_WIDE_INT
+ exact_log2 (high
)
1861 : exact_log2 (low
));
1864 /* Similar, but return the largest integer Y such that 2 ** Y is less
1865 than or equal to EXPR. */
1868 tree_floor_log2 (const_tree expr
)
1871 HOST_WIDE_INT high
, low
;
1875 if (TREE_CODE (expr
) == COMPLEX_CST
)
1876 return tree_log2 (TREE_REALPART (expr
));
1878 prec
= TYPE_PRECISION (TREE_TYPE (expr
));
1879 high
= TREE_INT_CST_HIGH (expr
);
1880 low
= TREE_INT_CST_LOW (expr
);
1882 /* First clear all bits that are beyond the type's precision in case
1883 we've been sign extended. Ignore if type's precision hasn't been set
1884 since what we are doing is setting it. */
1886 if (prec
== 2 * HOST_BITS_PER_WIDE_INT
|| prec
== 0)
1888 else if (prec
> HOST_BITS_PER_WIDE_INT
)
1889 high
&= ~((HOST_WIDE_INT
) (-1) << (prec
- HOST_BITS_PER_WIDE_INT
));
1893 if (prec
< HOST_BITS_PER_WIDE_INT
)
1894 low
&= ~((HOST_WIDE_INT
) (-1) << prec
);
1897 return (high
!= 0 ? HOST_BITS_PER_WIDE_INT
+ floor_log2 (high
)
1898 : floor_log2 (low
));
1901 /* Return 1 if EXPR is the real constant zero. Trailing zeroes matter for
1902 decimal float constants, so don't return 1 for them. */
1905 real_zerop (const_tree expr
)
1909 return ((TREE_CODE (expr
) == REAL_CST
1910 && REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconst0
)
1911 && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr
)))))
1912 || (TREE_CODE (expr
) == COMPLEX_CST
1913 && real_zerop (TREE_REALPART (expr
))
1914 && real_zerop (TREE_IMAGPART (expr
))));
1917 /* Return 1 if EXPR is the real constant one in real or complex form.
1918 Trailing zeroes matter for decimal float constants, so don't return
1922 real_onep (const_tree expr
)
1926 return ((TREE_CODE (expr
) == REAL_CST
1927 && REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconst1
)
1928 && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr
)))))
1929 || (TREE_CODE (expr
) == COMPLEX_CST
1930 && real_onep (TREE_REALPART (expr
))
1931 && real_zerop (TREE_IMAGPART (expr
))));
1934 /* Return 1 if EXPR is the real constant two. Trailing zeroes matter
1935 for decimal float constants, so don't return 1 for them. */
1938 real_twop (const_tree expr
)
1942 return ((TREE_CODE (expr
) == REAL_CST
1943 && REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconst2
)
1944 && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr
)))))
1945 || (TREE_CODE (expr
) == COMPLEX_CST
1946 && real_twop (TREE_REALPART (expr
))
1947 && real_zerop (TREE_IMAGPART (expr
))));
1950 /* Return 1 if EXPR is the real constant minus one. Trailing zeroes
1951 matter for decimal float constants, so don't return 1 for them. */
1954 real_minus_onep (const_tree expr
)
1958 return ((TREE_CODE (expr
) == REAL_CST
1959 && REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconstm1
)
1960 && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr
)))))
1961 || (TREE_CODE (expr
) == COMPLEX_CST
1962 && real_minus_onep (TREE_REALPART (expr
))
1963 && real_zerop (TREE_IMAGPART (expr
))));
1966 /* Nonzero if EXP is a constant or a cast of a constant. */
1969 really_constant_p (const_tree exp
)
1971 /* This is not quite the same as STRIP_NOPS. It does more. */
1972 while (CONVERT_EXPR_P (exp
)
1973 || TREE_CODE (exp
) == NON_LVALUE_EXPR
)
1974 exp
= TREE_OPERAND (exp
, 0);
1975 return TREE_CONSTANT (exp
);
1978 /* Return first list element whose TREE_VALUE is ELEM.
1979 Return 0 if ELEM is not in LIST. */
1982 value_member (tree elem
, tree list
)
1986 if (elem
== TREE_VALUE (list
))
1988 list
= TREE_CHAIN (list
);
1993 /* Return first list element whose TREE_PURPOSE is ELEM.
1994 Return 0 if ELEM is not in LIST. */
1997 purpose_member (const_tree elem
, tree list
)
2001 if (elem
== TREE_PURPOSE (list
))
2003 list
= TREE_CHAIN (list
);
2008 /* Return true if ELEM is in V. */
2011 vec_member (const_tree elem
, VEC(tree
,gc
) *v
)
2015 FOR_EACH_VEC_ELT (tree
, v
, ix
, t
)
2021 /* Returns element number IDX (zero-origin) of chain CHAIN, or
2025 chain_index (int idx
, tree chain
)
2027 for (; chain
&& idx
> 0; --idx
)
2028 chain
= TREE_CHAIN (chain
);
2032 /* Return nonzero if ELEM is part of the chain CHAIN. */
2035 chain_member (const_tree elem
, const_tree chain
)
2041 chain
= DECL_CHAIN (chain
);
2047 /* Return the length of a chain of nodes chained through TREE_CHAIN.
2048 We expect a null pointer to mark the end of the chain.
2049 This is the Lisp primitive `length'. */
2052 list_length (const_tree t
)
2055 #ifdef ENABLE_TREE_CHECKING
2063 #ifdef ENABLE_TREE_CHECKING
2066 gcc_assert (p
!= q
);
2074 /* Returns the number of FIELD_DECLs in TYPE. */
2077 fields_length (const_tree type
)
2079 tree t
= TYPE_FIELDS (type
);
2082 for (; t
; t
= DECL_CHAIN (t
))
2083 if (TREE_CODE (t
) == FIELD_DECL
)
2089 /* Returns the first FIELD_DECL in the TYPE_FIELDS of the RECORD_TYPE or
2090 UNION_TYPE TYPE, or NULL_TREE if none. */
2093 first_field (const_tree type
)
2095 tree t
= TYPE_FIELDS (type
);
2096 while (t
&& TREE_CODE (t
) != FIELD_DECL
)
2101 /* Concatenate two chains of nodes (chained through TREE_CHAIN)
2102 by modifying the last node in chain 1 to point to chain 2.
2103 This is the Lisp primitive `nconc'. */
2106 chainon (tree op1
, tree op2
)
2115 for (t1
= op1
; TREE_CHAIN (t1
); t1
= TREE_CHAIN (t1
))
2117 TREE_CHAIN (t1
) = op2
;
2119 #ifdef ENABLE_TREE_CHECKING
2122 for (t2
= op2
; t2
; t2
= TREE_CHAIN (t2
))
2123 gcc_assert (t2
!= t1
);
2130 /* Return the last node in a chain of nodes (chained through TREE_CHAIN). */
2133 tree_last (tree chain
)
2137 while ((next
= TREE_CHAIN (chain
)))
2142 /* Reverse the order of elements in the chain T,
2143 and return the new head of the chain (old last element). */
2148 tree prev
= 0, decl
, next
;
2149 for (decl
= t
; decl
; decl
= next
)
2151 /* We shouldn't be using this function to reverse BLOCK chains; we
2152 have blocks_nreverse for that. */
2153 gcc_checking_assert (TREE_CODE (decl
) != BLOCK
);
2154 next
= TREE_CHAIN (decl
);
2155 TREE_CHAIN (decl
) = prev
;
2161 /* Return a newly created TREE_LIST node whose
2162 purpose and value fields are PARM and VALUE. */
2165 build_tree_list_stat (tree parm
, tree value MEM_STAT_DECL
)
2167 tree t
= make_node_stat (TREE_LIST PASS_MEM_STAT
);
2168 TREE_PURPOSE (t
) = parm
;
2169 TREE_VALUE (t
) = value
;
2173 /* Build a chain of TREE_LIST nodes from a vector. */
2176 build_tree_list_vec_stat (const VEC(tree
,gc
) *vec MEM_STAT_DECL
)
2178 tree ret
= NULL_TREE
;
2182 FOR_EACH_VEC_ELT (tree
, vec
, i
, t
)
2184 *pp
= build_tree_list_stat (NULL
, t PASS_MEM_STAT
);
2185 pp
= &TREE_CHAIN (*pp
);
2190 /* Return a newly created TREE_LIST node whose
2191 purpose and value fields are PURPOSE and VALUE
2192 and whose TREE_CHAIN is CHAIN. */
2195 tree_cons_stat (tree purpose
, tree value
, tree chain MEM_STAT_DECL
)
2199 node
= ggc_alloc_zone_tree_node_stat (&tree_zone
, sizeof (struct tree_list
)
2201 memset (node
, 0, sizeof (struct tree_common
));
2203 record_node_allocation_statistics (TREE_LIST
, sizeof (struct tree_list
));
2205 TREE_SET_CODE (node
, TREE_LIST
);
2206 TREE_CHAIN (node
) = chain
;
2207 TREE_PURPOSE (node
) = purpose
;
2208 TREE_VALUE (node
) = value
;
2212 /* Return the values of the elements of a CONSTRUCTOR as a vector of
2216 ctor_to_vec (tree ctor
)
2218 VEC(tree
, gc
) *vec
= VEC_alloc (tree
, gc
, CONSTRUCTOR_NELTS (ctor
));
2222 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (ctor
), ix
, val
)
2223 VEC_quick_push (tree
, vec
, val
);
2228 /* Return the size nominally occupied by an object of type TYPE
2229 when it resides in memory. The value is measured in units of bytes,
2230 and its data type is that normally used for type sizes
2231 (which is the first type created by make_signed_type or
2232 make_unsigned_type). */
2235 size_in_bytes (const_tree type
)
2239 if (type
== error_mark_node
)
2240 return integer_zero_node
;
2242 type
= TYPE_MAIN_VARIANT (type
);
2243 t
= TYPE_SIZE_UNIT (type
);
2247 lang_hooks
.types
.incomplete_type_error (NULL_TREE
, type
);
2248 return size_zero_node
;
2254 /* Return the size of TYPE (in bytes) as a wide integer
2255 or return -1 if the size can vary or is larger than an integer. */
2258 int_size_in_bytes (const_tree type
)
2262 if (type
== error_mark_node
)
2265 type
= TYPE_MAIN_VARIANT (type
);
2266 t
= TYPE_SIZE_UNIT (type
);
2268 || TREE_CODE (t
) != INTEGER_CST
2269 || TREE_INT_CST_HIGH (t
) != 0
2270 /* If the result would appear negative, it's too big to represent. */
2271 || (HOST_WIDE_INT
) TREE_INT_CST_LOW (t
) < 0)
2274 return TREE_INT_CST_LOW (t
);
2277 /* Return the maximum size of TYPE (in bytes) as a wide integer
2278 or return -1 if the size can vary or is larger than an integer. */
2281 max_int_size_in_bytes (const_tree type
)
2283 HOST_WIDE_INT size
= -1;
2286 /* If this is an array type, check for a possible MAX_SIZE attached. */
2288 if (TREE_CODE (type
) == ARRAY_TYPE
)
2290 size_tree
= TYPE_ARRAY_MAX_SIZE (type
);
2292 if (size_tree
&& host_integerp (size_tree
, 1))
2293 size
= tree_low_cst (size_tree
, 1);
2296 /* If we still haven't been able to get a size, see if the language
2297 can compute a maximum size. */
2301 size_tree
= lang_hooks
.types
.max_size (type
);
2303 if (size_tree
&& host_integerp (size_tree
, 1))
2304 size
= tree_low_cst (size_tree
, 1);
2310 /* Returns a tree for the size of EXP in bytes. */
2313 tree_expr_size (const_tree exp
)
2316 && DECL_SIZE_UNIT (exp
) != 0)
2317 return DECL_SIZE_UNIT (exp
);
2319 return size_in_bytes (TREE_TYPE (exp
));
2322 /* Return the bit position of FIELD, in bits from the start of the record.
2323 This is a tree of type bitsizetype. */
2326 bit_position (const_tree field
)
2328 return bit_from_pos (DECL_FIELD_OFFSET (field
),
2329 DECL_FIELD_BIT_OFFSET (field
));
2332 /* Likewise, but return as an integer. It must be representable in
2333 that way (since it could be a signed value, we don't have the
2334 option of returning -1 like int_size_in_byte can. */
2337 int_bit_position (const_tree field
)
2339 return tree_low_cst (bit_position (field
), 0);
2342 /* Return the byte position of FIELD, in bytes from the start of the record.
2343 This is a tree of type sizetype. */
2346 byte_position (const_tree field
)
2348 return byte_from_pos (DECL_FIELD_OFFSET (field
),
2349 DECL_FIELD_BIT_OFFSET (field
));
2352 /* Likewise, but return as an integer. It must be representable in
2353 that way (since it could be a signed value, we don't have the
2354 option of returning -1 like int_size_in_byte can. */
2357 int_byte_position (const_tree field
)
2359 return tree_low_cst (byte_position (field
), 0);
2362 /* Return the strictest alignment, in bits, that T is known to have. */
2365 expr_align (const_tree t
)
2367 unsigned int align0
, align1
;
2369 switch (TREE_CODE (t
))
2371 CASE_CONVERT
: case NON_LVALUE_EXPR
:
2372 /* If we have conversions, we know that the alignment of the
2373 object must meet each of the alignments of the types. */
2374 align0
= expr_align (TREE_OPERAND (t
, 0));
2375 align1
= TYPE_ALIGN (TREE_TYPE (t
));
2376 return MAX (align0
, align1
);
2378 case SAVE_EXPR
: case COMPOUND_EXPR
: case MODIFY_EXPR
:
2379 case INIT_EXPR
: case TARGET_EXPR
: case WITH_CLEANUP_EXPR
:
2380 case CLEANUP_POINT_EXPR
:
2381 /* These don't change the alignment of an object. */
2382 return expr_align (TREE_OPERAND (t
, 0));
2385 /* The best we can do is say that the alignment is the least aligned
2387 align0
= expr_align (TREE_OPERAND (t
, 1));
2388 align1
= expr_align (TREE_OPERAND (t
, 2));
2389 return MIN (align0
, align1
);
2391 /* FIXME: LABEL_DECL and CONST_DECL never have DECL_ALIGN set
2392 meaningfully, it's always 1. */
2393 case LABEL_DECL
: case CONST_DECL
:
2394 case VAR_DECL
: case PARM_DECL
: case RESULT_DECL
:
2396 gcc_assert (DECL_ALIGN (t
) != 0);
2397 return DECL_ALIGN (t
);
2403 /* Otherwise take the alignment from that of the type. */
2404 return TYPE_ALIGN (TREE_TYPE (t
));
2407 /* Return, as a tree node, the number of elements for TYPE (which is an
2408 ARRAY_TYPE) minus one. This counts only elements of the top array. */
2411 array_type_nelts (const_tree type
)
2413 tree index_type
, min
, max
;
2415 /* If they did it with unspecified bounds, then we should have already
2416 given an error about it before we got here. */
2417 if (! TYPE_DOMAIN (type
))
2418 return error_mark_node
;
2420 index_type
= TYPE_DOMAIN (type
);
2421 min
= TYPE_MIN_VALUE (index_type
);
2422 max
= TYPE_MAX_VALUE (index_type
);
2424 /* TYPE_MAX_VALUE may not be set if the array has unknown length. */
2426 return error_mark_node
;
2428 return (integer_zerop (min
)
2430 : fold_build2 (MINUS_EXPR
, TREE_TYPE (max
), max
, min
));
2433 /* If arg is static -- a reference to an object in static storage -- then
2434 return the object. This is not the same as the C meaning of `static'.
2435 If arg isn't static, return NULL. */
2440 switch (TREE_CODE (arg
))
2443 /* Nested functions are static, even though taking their address will
2444 involve a trampoline as we unnest the nested function and create
2445 the trampoline on the tree level. */
2449 return ((TREE_STATIC (arg
) || DECL_EXTERNAL (arg
))
2450 && ! DECL_THREAD_LOCAL_P (arg
)
2451 && ! DECL_DLLIMPORT_P (arg
)
2455 return ((TREE_STATIC (arg
) || DECL_EXTERNAL (arg
))
2459 return TREE_STATIC (arg
) ? arg
: NULL
;
2466 /* If the thing being referenced is not a field, then it is
2467 something language specific. */
2468 gcc_assert (TREE_CODE (TREE_OPERAND (arg
, 1)) == FIELD_DECL
);
2470 /* If we are referencing a bitfield, we can't evaluate an
2471 ADDR_EXPR at compile time and so it isn't a constant. */
2472 if (DECL_BIT_FIELD (TREE_OPERAND (arg
, 1)))
2475 return staticp (TREE_OPERAND (arg
, 0));
2481 return TREE_CONSTANT (TREE_OPERAND (arg
, 0)) ? arg
: NULL
;
2484 case ARRAY_RANGE_REF
:
2485 if (TREE_CODE (TYPE_SIZE (TREE_TYPE (arg
))) == INTEGER_CST
2486 && TREE_CODE (TREE_OPERAND (arg
, 1)) == INTEGER_CST
)
2487 return staticp (TREE_OPERAND (arg
, 0));
2491 case COMPOUND_LITERAL_EXPR
:
2492 return TREE_STATIC (COMPOUND_LITERAL_EXPR_DECL (arg
)) ? arg
: NULL
;
2502 /* Return whether OP is a DECL whose address is function-invariant. */
2505 decl_address_invariant_p (const_tree op
)
2507 /* The conditions below are slightly less strict than the one in
2510 switch (TREE_CODE (op
))
2519 if ((TREE_STATIC (op
) || DECL_EXTERNAL (op
))
2520 || DECL_THREAD_LOCAL_P (op
)
2521 || DECL_CONTEXT (op
) == current_function_decl
2522 || decl_function_context (op
) == current_function_decl
)
2527 if ((TREE_STATIC (op
) || DECL_EXTERNAL (op
))
2528 || decl_function_context (op
) == current_function_decl
)
2539 /* Return whether OP is a DECL whose address is interprocedural-invariant. */
2542 decl_address_ip_invariant_p (const_tree op
)
2544 /* The conditions below are slightly less strict than the one in
2547 switch (TREE_CODE (op
))
2555 if (((TREE_STATIC (op
) || DECL_EXTERNAL (op
))
2556 && !DECL_DLLIMPORT_P (op
))
2557 || DECL_THREAD_LOCAL_P (op
))
2562 if ((TREE_STATIC (op
) || DECL_EXTERNAL (op
)))
2574 /* Return true if T is function-invariant (internal function, does
2575 not handle arithmetic; that's handled in skip_simple_arithmetic and
2576 tree_invariant_p). */
2578 static bool tree_invariant_p (tree t
);
2581 tree_invariant_p_1 (tree t
)
2585 if (TREE_CONSTANT (t
)
2586 || (TREE_READONLY (t
) && !TREE_SIDE_EFFECTS (t
)))
2589 switch (TREE_CODE (t
))
2595 op
= TREE_OPERAND (t
, 0);
2596 while (handled_component_p (op
))
2598 switch (TREE_CODE (op
))
2601 case ARRAY_RANGE_REF
:
2602 if (!tree_invariant_p (TREE_OPERAND (op
, 1))
2603 || TREE_OPERAND (op
, 2) != NULL_TREE
2604 || TREE_OPERAND (op
, 3) != NULL_TREE
)
2609 if (TREE_OPERAND (op
, 2) != NULL_TREE
)
2615 op
= TREE_OPERAND (op
, 0);
2618 return CONSTANT_CLASS_P (op
) || decl_address_invariant_p (op
);
2627 /* Return true if T is function-invariant. */
2630 tree_invariant_p (tree t
)
2632 tree inner
= skip_simple_arithmetic (t
);
2633 return tree_invariant_p_1 (inner
);
2636 /* Wrap a SAVE_EXPR around EXPR, if appropriate.
2637 Do this to any expression which may be used in more than one place,
2638 but must be evaluated only once.
2640 Normally, expand_expr would reevaluate the expression each time.
2641 Calling save_expr produces something that is evaluated and recorded
2642 the first time expand_expr is called on it. Subsequent calls to
2643 expand_expr just reuse the recorded value.
2645 The call to expand_expr that generates code that actually computes
2646 the value is the first call *at compile time*. Subsequent calls
2647 *at compile time* generate code to use the saved value.
2648 This produces correct result provided that *at run time* control
2649 always flows through the insns made by the first expand_expr
2650 before reaching the other places where the save_expr was evaluated.
2651 You, the caller of save_expr, must make sure this is so.
2653 Constants, and certain read-only nodes, are returned with no
2654 SAVE_EXPR because that is safe. Expressions containing placeholders
2655 are not touched; see tree.def for an explanation of what these
2659 save_expr (tree expr
)
2661 tree t
= fold (expr
);
2664 /* If the tree evaluates to a constant, then we don't want to hide that
2665 fact (i.e. this allows further folding, and direct checks for constants).
2666 However, a read-only object that has side effects cannot be bypassed.
2667 Since it is no problem to reevaluate literals, we just return the
2669 inner
= skip_simple_arithmetic (t
);
2670 if (TREE_CODE (inner
) == ERROR_MARK
)
2673 if (tree_invariant_p_1 (inner
))
2676 /* If INNER contains a PLACEHOLDER_EXPR, we must evaluate it each time, since
2677 it means that the size or offset of some field of an object depends on
2678 the value within another field.
2680 Note that it must not be the case that T contains both a PLACEHOLDER_EXPR
2681 and some variable since it would then need to be both evaluated once and
2682 evaluated more than once. Front-ends must assure this case cannot
2683 happen by surrounding any such subexpressions in their own SAVE_EXPR
2684 and forcing evaluation at the proper time. */
2685 if (contains_placeholder_p (inner
))
2688 t
= build1 (SAVE_EXPR
, TREE_TYPE (expr
), t
);
2689 SET_EXPR_LOCATION (t
, EXPR_LOCATION (expr
));
2691 /* This expression might be placed ahead of a jump to ensure that the
2692 value was computed on both sides of the jump. So make sure it isn't
2693 eliminated as dead. */
2694 TREE_SIDE_EFFECTS (t
) = 1;
2698 /* Look inside EXPR and into any simple arithmetic operations. Return
2699 the innermost non-arithmetic node. */
2702 skip_simple_arithmetic (tree expr
)
2706 /* We don't care about whether this can be used as an lvalue in this
2708 while (TREE_CODE (expr
) == NON_LVALUE_EXPR
)
2709 expr
= TREE_OPERAND (expr
, 0);
2711 /* If we have simple operations applied to a SAVE_EXPR or to a SAVE_EXPR and
2712 a constant, it will be more efficient to not make another SAVE_EXPR since
2713 it will allow better simplification and GCSE will be able to merge the
2714 computations if they actually occur. */
2718 if (UNARY_CLASS_P (inner
))
2719 inner
= TREE_OPERAND (inner
, 0);
2720 else if (BINARY_CLASS_P (inner
))
2722 if (tree_invariant_p (TREE_OPERAND (inner
, 1)))
2723 inner
= TREE_OPERAND (inner
, 0);
2724 else if (tree_invariant_p (TREE_OPERAND (inner
, 0)))
2725 inner
= TREE_OPERAND (inner
, 1);
2737 /* Return which tree structure is used by T. */
2739 enum tree_node_structure_enum
2740 tree_node_structure (const_tree t
)
2742 const enum tree_code code
= TREE_CODE (t
);
2743 return tree_node_structure_for_code (code
);
2746 /* Set various status flags when building a CALL_EXPR object T. */
2749 process_call_operands (tree t
)
2751 bool side_effects
= TREE_SIDE_EFFECTS (t
);
2752 bool read_only
= false;
2753 int i
= call_expr_flags (t
);
2755 /* Calls have side-effects, except those to const or pure functions. */
2756 if ((i
& ECF_LOOPING_CONST_OR_PURE
) || !(i
& (ECF_CONST
| ECF_PURE
)))
2757 side_effects
= true;
2758 /* Propagate TREE_READONLY of arguments for const functions. */
2762 if (!side_effects
|| read_only
)
2763 for (i
= 1; i
< TREE_OPERAND_LENGTH (t
); i
++)
2765 tree op
= TREE_OPERAND (t
, i
);
2766 if (op
&& TREE_SIDE_EFFECTS (op
))
2767 side_effects
= true;
2768 if (op
&& !TREE_READONLY (op
) && !CONSTANT_CLASS_P (op
))
2772 TREE_SIDE_EFFECTS (t
) = side_effects
;
2773 TREE_READONLY (t
) = read_only
;
2776 /* Return true if EXP contains a PLACEHOLDER_EXPR, i.e. if it represents a
2777 size or offset that depends on a field within a record. */
2780 contains_placeholder_p (const_tree exp
)
2782 enum tree_code code
;
2787 code
= TREE_CODE (exp
);
2788 if (code
== PLACEHOLDER_EXPR
)
2791 switch (TREE_CODE_CLASS (code
))
2794 /* Don't look at any PLACEHOLDER_EXPRs that might be in index or bit
2795 position computations since they will be converted into a
2796 WITH_RECORD_EXPR involving the reference, which will assume
2797 here will be valid. */
2798 return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0));
2800 case tcc_exceptional
:
2801 if (code
== TREE_LIST
)
2802 return (CONTAINS_PLACEHOLDER_P (TREE_VALUE (exp
))
2803 || CONTAINS_PLACEHOLDER_P (TREE_CHAIN (exp
)));
2808 case tcc_comparison
:
2809 case tcc_expression
:
2813 /* Ignoring the first operand isn't quite right, but works best. */
2814 return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 1));
2817 return (CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0))
2818 || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 1))
2819 || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 2)));
2822 /* The save_expr function never wraps anything containing
2823 a PLACEHOLDER_EXPR. */
2830 switch (TREE_CODE_LENGTH (code
))
2833 return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0));
2835 return (CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0))
2836 || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 1)));
2847 const_call_expr_arg_iterator iter
;
2848 FOR_EACH_CONST_CALL_EXPR_ARG (arg
, iter
, exp
)
2849 if (CONTAINS_PLACEHOLDER_P (arg
))
2863 /* Return true if any part of the structure of TYPE involves a PLACEHOLDER_EXPR
2864 directly. This includes size, bounds, qualifiers (for QUAL_UNION_TYPE) and
2868 type_contains_placeholder_1 (const_tree type
)
2870 /* If the size contains a placeholder or the parent type (component type in
2871 the case of arrays) type involves a placeholder, this type does. */
2872 if (CONTAINS_PLACEHOLDER_P (TYPE_SIZE (type
))
2873 || CONTAINS_PLACEHOLDER_P (TYPE_SIZE_UNIT (type
))
2874 || (!POINTER_TYPE_P (type
)
2876 && type_contains_placeholder_p (TREE_TYPE (type
))))
2879 /* Now do type-specific checks. Note that the last part of the check above
2880 greatly limits what we have to do below. */
2881 switch (TREE_CODE (type
))
2889 case REFERENCE_TYPE
:
2897 case FIXED_POINT_TYPE
:
2898 /* Here we just check the bounds. */
2899 return (CONTAINS_PLACEHOLDER_P (TYPE_MIN_VALUE (type
))
2900 || CONTAINS_PLACEHOLDER_P (TYPE_MAX_VALUE (type
)));
2903 /* We have already checked the component type above, so just check the
2905 return type_contains_placeholder_p (TYPE_DOMAIN (type
));
2909 case QUAL_UNION_TYPE
:
2913 for (field
= TYPE_FIELDS (type
); field
; field
= DECL_CHAIN (field
))
2914 if (TREE_CODE (field
) == FIELD_DECL
2915 && (CONTAINS_PLACEHOLDER_P (DECL_FIELD_OFFSET (field
))
2916 || (TREE_CODE (type
) == QUAL_UNION_TYPE
2917 && CONTAINS_PLACEHOLDER_P (DECL_QUALIFIER (field
)))
2918 || type_contains_placeholder_p (TREE_TYPE (field
))))
2929 /* Wrapper around above function used to cache its result. */
2932 type_contains_placeholder_p (tree type
)
2936 /* If the contains_placeholder_bits field has been initialized,
2937 then we know the answer. */
2938 if (TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) > 0)
2939 return TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) - 1;
2941 /* Indicate that we've seen this type node, and the answer is false.
2942 This is what we want to return if we run into recursion via fields. */
2943 TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) = 1;
2945 /* Compute the real value. */
2946 result
= type_contains_placeholder_1 (type
);
2948 /* Store the real value. */
2949 TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) = result
+ 1;
2954 /* Push tree EXP onto vector QUEUE if it is not already present. */
2957 push_without_duplicates (tree exp
, VEC (tree
, heap
) **queue
)
2962 FOR_EACH_VEC_ELT (tree
, *queue
, i
, iter
)
2963 if (simple_cst_equal (iter
, exp
) == 1)
2967 VEC_safe_push (tree
, heap
, *queue
, exp
);
2970 /* Given a tree EXP, find all occurences of references to fields
2971 in a PLACEHOLDER_EXPR and place them in vector REFS without
2972 duplicates. Also record VAR_DECLs and CONST_DECLs. Note that
2973 we assume here that EXP contains only arithmetic expressions
2974 or CALL_EXPRs with PLACEHOLDER_EXPRs occurring only in their
2978 find_placeholder_in_expr (tree exp
, VEC (tree
, heap
) **refs
)
2980 enum tree_code code
= TREE_CODE (exp
);
2984 /* We handle TREE_LIST and COMPONENT_REF separately. */
2985 if (code
== TREE_LIST
)
2987 FIND_PLACEHOLDER_IN_EXPR (TREE_CHAIN (exp
), refs
);
2988 FIND_PLACEHOLDER_IN_EXPR (TREE_VALUE (exp
), refs
);
2990 else if (code
== COMPONENT_REF
)
2992 for (inner
= TREE_OPERAND (exp
, 0);
2993 REFERENCE_CLASS_P (inner
);
2994 inner
= TREE_OPERAND (inner
, 0))
2997 if (TREE_CODE (inner
) == PLACEHOLDER_EXPR
)
2998 push_without_duplicates (exp
, refs
);
3000 FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), refs
);
3003 switch (TREE_CODE_CLASS (code
))
3008 case tcc_declaration
:
3009 /* Variables allocated to static storage can stay. */
3010 if (!TREE_STATIC (exp
))
3011 push_without_duplicates (exp
, refs
);
3014 case tcc_expression
:
3015 /* This is the pattern built in ada/make_aligning_type. */
3016 if (code
== ADDR_EXPR
3017 && TREE_CODE (TREE_OPERAND (exp
, 0)) == PLACEHOLDER_EXPR
)
3019 push_without_duplicates (exp
, refs
);
3023 /* Fall through... */
3025 case tcc_exceptional
:
3028 case tcc_comparison
:
3030 for (i
= 0; i
< TREE_CODE_LENGTH (code
); i
++)
3031 FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, i
), refs
);
3035 for (i
= 1; i
< TREE_OPERAND_LENGTH (exp
); i
++)
3036 FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, i
), refs
);
3044 /* Given a tree EXP, a FIELD_DECL F, and a replacement value R,
3045 return a tree with all occurrences of references to F in a
3046 PLACEHOLDER_EXPR replaced by R. Also handle VAR_DECLs and
3047 CONST_DECLs. Note that we assume here that EXP contains only
3048 arithmetic expressions or CALL_EXPRs with PLACEHOLDER_EXPRs
3049 occurring only in their argument list. */
3052 substitute_in_expr (tree exp
, tree f
, tree r
)
3054 enum tree_code code
= TREE_CODE (exp
);
3055 tree op0
, op1
, op2
, op3
;
3058 /* We handle TREE_LIST and COMPONENT_REF separately. */
3059 if (code
== TREE_LIST
)
3061 op0
= SUBSTITUTE_IN_EXPR (TREE_CHAIN (exp
), f
, r
);
3062 op1
= SUBSTITUTE_IN_EXPR (TREE_VALUE (exp
), f
, r
);
3063 if (op0
== TREE_CHAIN (exp
) && op1
== TREE_VALUE (exp
))
3066 return tree_cons (TREE_PURPOSE (exp
), op1
, op0
);
3068 else if (code
== COMPONENT_REF
)
3072 /* If this expression is getting a value from a PLACEHOLDER_EXPR
3073 and it is the right field, replace it with R. */
3074 for (inner
= TREE_OPERAND (exp
, 0);
3075 REFERENCE_CLASS_P (inner
);
3076 inner
= TREE_OPERAND (inner
, 0))
3080 op1
= TREE_OPERAND (exp
, 1);
3082 if (TREE_CODE (inner
) == PLACEHOLDER_EXPR
&& op1
== f
)
3085 /* If this expression hasn't been completed let, leave it alone. */
3086 if (TREE_CODE (inner
) == PLACEHOLDER_EXPR
&& !TREE_TYPE (inner
))
3089 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3090 if (op0
== TREE_OPERAND (exp
, 0))
3094 = fold_build3 (COMPONENT_REF
, TREE_TYPE (exp
), op0
, op1
, NULL_TREE
);
3097 switch (TREE_CODE_CLASS (code
))
3102 case tcc_declaration
:
3108 case tcc_expression
:
3112 /* Fall through... */
3114 case tcc_exceptional
:
3117 case tcc_comparison
:
3119 switch (TREE_CODE_LENGTH (code
))
3125 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3126 if (op0
== TREE_OPERAND (exp
, 0))
3129 new_tree
= fold_build1 (code
, TREE_TYPE (exp
), op0
);
3133 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3134 op1
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 1), f
, r
);
3136 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1))
3139 new_tree
= fold_build2 (code
, TREE_TYPE (exp
), op0
, op1
);
3143 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3144 op1
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 1), f
, r
);
3145 op2
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 2), f
, r
);
3147 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3148 && op2
== TREE_OPERAND (exp
, 2))
3151 new_tree
= fold_build3 (code
, TREE_TYPE (exp
), op0
, op1
, op2
);
3155 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3156 op1
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 1), f
, r
);
3157 op2
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 2), f
, r
);
3158 op3
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 3), f
, r
);
3160 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3161 && op2
== TREE_OPERAND (exp
, 2)
3162 && op3
== TREE_OPERAND (exp
, 3))
3166 = fold (build4 (code
, TREE_TYPE (exp
), op0
, op1
, op2
, op3
));
3178 new_tree
= NULL_TREE
;
3180 /* If we are trying to replace F with a constant, inline back
3181 functions which do nothing else than computing a value from
3182 the arguments they are passed. This makes it possible to
3183 fold partially or entirely the replacement expression. */
3184 if (CONSTANT_CLASS_P (r
) && code
== CALL_EXPR
)
3186 tree t
= maybe_inline_call_in_expr (exp
);
3188 return SUBSTITUTE_IN_EXPR (t
, f
, r
);
3191 for (i
= 1; i
< TREE_OPERAND_LENGTH (exp
); i
++)
3193 tree op
= TREE_OPERAND (exp
, i
);
3194 tree new_op
= SUBSTITUTE_IN_EXPR (op
, f
, r
);
3198 new_tree
= copy_node (exp
);
3199 TREE_OPERAND (new_tree
, i
) = new_op
;
3205 new_tree
= fold (new_tree
);
3206 if (TREE_CODE (new_tree
) == CALL_EXPR
)
3207 process_call_operands (new_tree
);
3218 TREE_READONLY (new_tree
) |= TREE_READONLY (exp
);
3220 if (code
== INDIRECT_REF
|| code
== ARRAY_REF
|| code
== ARRAY_RANGE_REF
)
3221 TREE_THIS_NOTRAP (new_tree
) |= TREE_THIS_NOTRAP (exp
);
3226 /* Similar, but look for a PLACEHOLDER_EXPR in EXP and find a replacement
3227 for it within OBJ, a tree that is an object or a chain of references. */
3230 substitute_placeholder_in_expr (tree exp
, tree obj
)
3232 enum tree_code code
= TREE_CODE (exp
);
3233 tree op0
, op1
, op2
, op3
;
3236 /* If this is a PLACEHOLDER_EXPR, see if we find a corresponding type
3237 in the chain of OBJ. */
3238 if (code
== PLACEHOLDER_EXPR
)
3240 tree need_type
= TYPE_MAIN_VARIANT (TREE_TYPE (exp
));
3243 for (elt
= obj
; elt
!= 0;
3244 elt
= ((TREE_CODE (elt
) == COMPOUND_EXPR
3245 || TREE_CODE (elt
) == COND_EXPR
)
3246 ? TREE_OPERAND (elt
, 1)
3247 : (REFERENCE_CLASS_P (elt
)
3248 || UNARY_CLASS_P (elt
)
3249 || BINARY_CLASS_P (elt
)
3250 || VL_EXP_CLASS_P (elt
)
3251 || EXPRESSION_CLASS_P (elt
))
3252 ? TREE_OPERAND (elt
, 0) : 0))
3253 if (TYPE_MAIN_VARIANT (TREE_TYPE (elt
)) == need_type
)
3256 for (elt
= obj
; elt
!= 0;
3257 elt
= ((TREE_CODE (elt
) == COMPOUND_EXPR
3258 || TREE_CODE (elt
) == COND_EXPR
)
3259 ? TREE_OPERAND (elt
, 1)
3260 : (REFERENCE_CLASS_P (elt
)
3261 || UNARY_CLASS_P (elt
)
3262 || BINARY_CLASS_P (elt
)
3263 || VL_EXP_CLASS_P (elt
)
3264 || EXPRESSION_CLASS_P (elt
))
3265 ? TREE_OPERAND (elt
, 0) : 0))
3266 if (POINTER_TYPE_P (TREE_TYPE (elt
))
3267 && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (elt
)))
3269 return fold_build1 (INDIRECT_REF
, need_type
, elt
);
3271 /* If we didn't find it, return the original PLACEHOLDER_EXPR. If it
3272 survives until RTL generation, there will be an error. */
3276 /* TREE_LIST is special because we need to look at TREE_VALUE
3277 and TREE_CHAIN, not TREE_OPERANDS. */
3278 else if (code
== TREE_LIST
)
3280 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_CHAIN (exp
), obj
);
3281 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_VALUE (exp
), obj
);
3282 if (op0
== TREE_CHAIN (exp
) && op1
== TREE_VALUE (exp
))
3285 return tree_cons (TREE_PURPOSE (exp
), op1
, op0
);
3288 switch (TREE_CODE_CLASS (code
))
3291 case tcc_declaration
:
3294 case tcc_exceptional
:
3297 case tcc_comparison
:
3298 case tcc_expression
:
3301 switch (TREE_CODE_LENGTH (code
))
3307 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
3308 if (op0
== TREE_OPERAND (exp
, 0))
3311 new_tree
= fold_build1 (code
, TREE_TYPE (exp
), op0
);
3315 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
3316 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 1), obj
);
3318 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1))
3321 new_tree
= fold_build2 (code
, TREE_TYPE (exp
), op0
, op1
);
3325 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
3326 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 1), obj
);
3327 op2
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 2), obj
);
3329 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3330 && op2
== TREE_OPERAND (exp
, 2))
3333 new_tree
= fold_build3 (code
, TREE_TYPE (exp
), op0
, op1
, op2
);
3337 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
3338 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 1), obj
);
3339 op2
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 2), obj
);
3340 op3
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 3), obj
);
3342 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3343 && op2
== TREE_OPERAND (exp
, 2)
3344 && op3
== TREE_OPERAND (exp
, 3))
3348 = fold (build4 (code
, TREE_TYPE (exp
), op0
, op1
, op2
, op3
));
3360 new_tree
= NULL_TREE
;
3362 for (i
= 1; i
< TREE_OPERAND_LENGTH (exp
); i
++)
3364 tree op
= TREE_OPERAND (exp
, i
);
3365 tree new_op
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (op
, obj
);
3369 new_tree
= copy_node (exp
);
3370 TREE_OPERAND (new_tree
, i
) = new_op
;
3376 new_tree
= fold (new_tree
);
3377 if (TREE_CODE (new_tree
) == CALL_EXPR
)
3378 process_call_operands (new_tree
);
3389 TREE_READONLY (new_tree
) |= TREE_READONLY (exp
);
3391 if (code
== INDIRECT_REF
|| code
== ARRAY_REF
|| code
== ARRAY_RANGE_REF
)
3392 TREE_THIS_NOTRAP (new_tree
) |= TREE_THIS_NOTRAP (exp
);
3397 /* Stabilize a reference so that we can use it any number of times
3398 without causing its operands to be evaluated more than once.
3399 Returns the stabilized reference. This works by means of save_expr,
3400 so see the caveats in the comments about save_expr.
3402 Also allows conversion expressions whose operands are references.
3403 Any other kind of expression is returned unchanged. */
3406 stabilize_reference (tree ref
)
3409 enum tree_code code
= TREE_CODE (ref
);
3416 /* No action is needed in this case. */
3421 case FIX_TRUNC_EXPR
:
3422 result
= build_nt (code
, stabilize_reference (TREE_OPERAND (ref
, 0)));
3426 result
= build_nt (INDIRECT_REF
,
3427 stabilize_reference_1 (TREE_OPERAND (ref
, 0)));
3431 result
= build_nt (COMPONENT_REF
,
3432 stabilize_reference (TREE_OPERAND (ref
, 0)),
3433 TREE_OPERAND (ref
, 1), NULL_TREE
);
3437 result
= build_nt (BIT_FIELD_REF
,
3438 stabilize_reference (TREE_OPERAND (ref
, 0)),
3439 stabilize_reference_1 (TREE_OPERAND (ref
, 1)),
3440 stabilize_reference_1 (TREE_OPERAND (ref
, 2)));
3444 result
= build_nt (ARRAY_REF
,
3445 stabilize_reference (TREE_OPERAND (ref
, 0)),
3446 stabilize_reference_1 (TREE_OPERAND (ref
, 1)),
3447 TREE_OPERAND (ref
, 2), TREE_OPERAND (ref
, 3));
3450 case ARRAY_RANGE_REF
:
3451 result
= build_nt (ARRAY_RANGE_REF
,
3452 stabilize_reference (TREE_OPERAND (ref
, 0)),
3453 stabilize_reference_1 (TREE_OPERAND (ref
, 1)),
3454 TREE_OPERAND (ref
, 2), TREE_OPERAND (ref
, 3));
3458 /* We cannot wrap the first expression in a SAVE_EXPR, as then
3459 it wouldn't be ignored. This matters when dealing with
3461 return stabilize_reference_1 (ref
);
3463 /* If arg isn't a kind of lvalue we recognize, make no change.
3464 Caller should recognize the error for an invalid lvalue. */
3469 return error_mark_node
;
3472 TREE_TYPE (result
) = TREE_TYPE (ref
);
3473 TREE_READONLY (result
) = TREE_READONLY (ref
);
3474 TREE_SIDE_EFFECTS (result
) = TREE_SIDE_EFFECTS (ref
);
3475 TREE_THIS_VOLATILE (result
) = TREE_THIS_VOLATILE (ref
);
3480 /* Subroutine of stabilize_reference; this is called for subtrees of
3481 references. Any expression with side-effects must be put in a SAVE_EXPR
3482 to ensure that it is only evaluated once.
3484 We don't put SAVE_EXPR nodes around everything, because assigning very
3485 simple expressions to temporaries causes us to miss good opportunities
3486 for optimizations. Among other things, the opportunity to fold in the
3487 addition of a constant into an addressing mode often gets lost, e.g.
3488 "y[i+1] += x;". In general, we take the approach that we should not make
3489 an assignment unless we are forced into it - i.e., that any non-side effect
3490 operator should be allowed, and that cse should take care of coalescing
3491 multiple utterances of the same expression should that prove fruitful. */
3494 stabilize_reference_1 (tree e
)
3497 enum tree_code code
= TREE_CODE (e
);
3499 /* We cannot ignore const expressions because it might be a reference
3500 to a const array but whose index contains side-effects. But we can
3501 ignore things that are actual constant or that already have been
3502 handled by this function. */
3504 if (tree_invariant_p (e
))
3507 switch (TREE_CODE_CLASS (code
))
3509 case tcc_exceptional
:
3511 case tcc_declaration
:
3512 case tcc_comparison
:
3514 case tcc_expression
:
3517 /* If the expression has side-effects, then encase it in a SAVE_EXPR
3518 so that it will only be evaluated once. */
3519 /* The reference (r) and comparison (<) classes could be handled as
3520 below, but it is generally faster to only evaluate them once. */
3521 if (TREE_SIDE_EFFECTS (e
))
3522 return save_expr (e
);
3526 /* Constants need no processing. In fact, we should never reach
3531 /* Division is slow and tends to be compiled with jumps,
3532 especially the division by powers of 2 that is often
3533 found inside of an array reference. So do it just once. */
3534 if (code
== TRUNC_DIV_EXPR
|| code
== TRUNC_MOD_EXPR
3535 || code
== FLOOR_DIV_EXPR
|| code
== FLOOR_MOD_EXPR
3536 || code
== CEIL_DIV_EXPR
|| code
== CEIL_MOD_EXPR
3537 || code
== ROUND_DIV_EXPR
|| code
== ROUND_MOD_EXPR
)
3538 return save_expr (e
);
3539 /* Recursively stabilize each operand. */
3540 result
= build_nt (code
, stabilize_reference_1 (TREE_OPERAND (e
, 0)),
3541 stabilize_reference_1 (TREE_OPERAND (e
, 1)));
3545 /* Recursively stabilize each operand. */
3546 result
= build_nt (code
, stabilize_reference_1 (TREE_OPERAND (e
, 0)));
3553 TREE_TYPE (result
) = TREE_TYPE (e
);
3554 TREE_READONLY (result
) = TREE_READONLY (e
);
3555 TREE_SIDE_EFFECTS (result
) = TREE_SIDE_EFFECTS (e
);
3556 TREE_THIS_VOLATILE (result
) = TREE_THIS_VOLATILE (e
);
3561 /* Low-level constructors for expressions. */
3563 /* A helper function for build1 and constant folders. Set TREE_CONSTANT,
3564 and TREE_SIDE_EFFECTS for an ADDR_EXPR. */
3567 recompute_tree_invariant_for_addr_expr (tree t
)
3570 bool tc
= true, se
= false;
3572 /* We started out assuming this address is both invariant and constant, but
3573 does not have side effects. Now go down any handled components and see if
3574 any of them involve offsets that are either non-constant or non-invariant.
3575 Also check for side-effects.
3577 ??? Note that this code makes no attempt to deal with the case where
3578 taking the address of something causes a copy due to misalignment. */
3580 #define UPDATE_FLAGS(NODE) \
3581 do { tree _node = (NODE); \
3582 if (_node && !TREE_CONSTANT (_node)) tc = false; \
3583 if (_node && TREE_SIDE_EFFECTS (_node)) se = true; } while (0)
3585 for (node
= TREE_OPERAND (t
, 0); handled_component_p (node
);
3586 node
= TREE_OPERAND (node
, 0))
3588 /* If the first operand doesn't have an ARRAY_TYPE, this is a bogus
3589 array reference (probably made temporarily by the G++ front end),
3590 so ignore all the operands. */
3591 if ((TREE_CODE (node
) == ARRAY_REF
3592 || TREE_CODE (node
) == ARRAY_RANGE_REF
)
3593 && TREE_CODE (TREE_TYPE (TREE_OPERAND (node
, 0))) == ARRAY_TYPE
)
3595 UPDATE_FLAGS (TREE_OPERAND (node
, 1));
3596 if (TREE_OPERAND (node
, 2))
3597 UPDATE_FLAGS (TREE_OPERAND (node
, 2));
3598 if (TREE_OPERAND (node
, 3))
3599 UPDATE_FLAGS (TREE_OPERAND (node
, 3));
3601 /* Likewise, just because this is a COMPONENT_REF doesn't mean we have a
3602 FIELD_DECL, apparently. The G++ front end can put something else
3603 there, at least temporarily. */
3604 else if (TREE_CODE (node
) == COMPONENT_REF
3605 && TREE_CODE (TREE_OPERAND (node
, 1)) == FIELD_DECL
)
3607 if (TREE_OPERAND (node
, 2))
3608 UPDATE_FLAGS (TREE_OPERAND (node
, 2));
3610 else if (TREE_CODE (node
) == BIT_FIELD_REF
)
3611 UPDATE_FLAGS (TREE_OPERAND (node
, 2));
3614 node
= lang_hooks
.expr_to_decl (node
, &tc
, &se
);
3616 /* Now see what's inside. If it's an INDIRECT_REF, copy our properties from
3617 the address, since &(*a)->b is a form of addition. If it's a constant, the
3618 address is constant too. If it's a decl, its address is constant if the
3619 decl is static. Everything else is not constant and, furthermore,
3620 taking the address of a volatile variable is not volatile. */
3621 if (TREE_CODE (node
) == INDIRECT_REF
3622 || TREE_CODE (node
) == MEM_REF
)
3623 UPDATE_FLAGS (TREE_OPERAND (node
, 0));
3624 else if (CONSTANT_CLASS_P (node
))
3626 else if (DECL_P (node
))
3627 tc
&= (staticp (node
) != NULL_TREE
);
3631 se
|= TREE_SIDE_EFFECTS (node
);
3635 TREE_CONSTANT (t
) = tc
;
3636 TREE_SIDE_EFFECTS (t
) = se
;
3640 /* Build an expression of code CODE, data type TYPE, and operands as
3641 specified. Expressions and reference nodes can be created this way.
3642 Constants, decls, types and misc nodes cannot be.
3644 We define 5 non-variadic functions, from 0 to 4 arguments. This is
3645 enough for all extant tree codes. */
3648 build0_stat (enum tree_code code
, tree tt MEM_STAT_DECL
)
3652 gcc_assert (TREE_CODE_LENGTH (code
) == 0);
3654 t
= make_node_stat (code PASS_MEM_STAT
);
3661 build1_stat (enum tree_code code
, tree type
, tree node MEM_STAT_DECL
)
3663 int length
= sizeof (struct tree_exp
);
3666 record_node_allocation_statistics (code
, length
);
3668 gcc_assert (TREE_CODE_LENGTH (code
) == 1);
3670 t
= ggc_alloc_zone_tree_node_stat (&tree_zone
, length PASS_MEM_STAT
);
3672 memset (t
, 0, sizeof (struct tree_common
));
3674 TREE_SET_CODE (t
, code
);
3676 TREE_TYPE (t
) = type
;
3677 SET_EXPR_LOCATION (t
, UNKNOWN_LOCATION
);
3678 TREE_OPERAND (t
, 0) = node
;
3679 TREE_BLOCK (t
) = NULL_TREE
;
3680 if (node
&& !TYPE_P (node
))
3682 TREE_SIDE_EFFECTS (t
) = TREE_SIDE_EFFECTS (node
);
3683 TREE_READONLY (t
) = TREE_READONLY (node
);
3686 if (TREE_CODE_CLASS (code
) == tcc_statement
)
3687 TREE_SIDE_EFFECTS (t
) = 1;
3691 /* All of these have side-effects, no matter what their
3693 TREE_SIDE_EFFECTS (t
) = 1;
3694 TREE_READONLY (t
) = 0;
3698 /* Whether a dereference is readonly has nothing to do with whether
3699 its operand is readonly. */
3700 TREE_READONLY (t
) = 0;
3705 recompute_tree_invariant_for_addr_expr (t
);
3709 if ((TREE_CODE_CLASS (code
) == tcc_unary
|| code
== VIEW_CONVERT_EXPR
)
3710 && node
&& !TYPE_P (node
)
3711 && TREE_CONSTANT (node
))
3712 TREE_CONSTANT (t
) = 1;
3713 if (TREE_CODE_CLASS (code
) == tcc_reference
3714 && node
&& TREE_THIS_VOLATILE (node
))
3715 TREE_THIS_VOLATILE (t
) = 1;
3722 #define PROCESS_ARG(N) \
3724 TREE_OPERAND (t, N) = arg##N; \
3725 if (arg##N &&!TYPE_P (arg##N)) \
3727 if (TREE_SIDE_EFFECTS (arg##N)) \
3729 if (!TREE_READONLY (arg##N) \
3730 && !CONSTANT_CLASS_P (arg##N)) \
3731 (void) (read_only = 0); \
3732 if (!TREE_CONSTANT (arg##N)) \
3733 (void) (constant = 0); \
3738 build2_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1 MEM_STAT_DECL
)
3740 bool constant
, read_only
, side_effects
;
3743 gcc_assert (TREE_CODE_LENGTH (code
) == 2);
3745 if ((code
== MINUS_EXPR
|| code
== PLUS_EXPR
|| code
== MULT_EXPR
)
3746 && arg0
&& arg1
&& tt
&& POINTER_TYPE_P (tt
)
3747 /* When sizetype precision doesn't match that of pointers
3748 we need to be able to build explicit extensions or truncations
3749 of the offset argument. */
3750 && TYPE_PRECISION (sizetype
) == TYPE_PRECISION (tt
))
3751 gcc_assert (TREE_CODE (arg0
) == INTEGER_CST
3752 && TREE_CODE (arg1
) == INTEGER_CST
);
3754 if (code
== POINTER_PLUS_EXPR
&& arg0
&& arg1
&& tt
)
3755 gcc_assert (POINTER_TYPE_P (tt
) && POINTER_TYPE_P (TREE_TYPE (arg0
))
3756 && INTEGRAL_TYPE_P (TREE_TYPE (arg1
))
3757 && useless_type_conversion_p (sizetype
, TREE_TYPE (arg1
)));
3759 t
= make_node_stat (code PASS_MEM_STAT
);
3762 /* Below, we automatically set TREE_SIDE_EFFECTS and TREE_READONLY for the
3763 result based on those same flags for the arguments. But if the
3764 arguments aren't really even `tree' expressions, we shouldn't be trying
3767 /* Expressions without side effects may be constant if their
3768 arguments are as well. */
3769 constant
= (TREE_CODE_CLASS (code
) == tcc_comparison
3770 || TREE_CODE_CLASS (code
) == tcc_binary
);
3772 side_effects
= TREE_SIDE_EFFECTS (t
);
3777 TREE_READONLY (t
) = read_only
;
3778 TREE_CONSTANT (t
) = constant
;
3779 TREE_SIDE_EFFECTS (t
) = side_effects
;
3780 TREE_THIS_VOLATILE (t
)
3781 = (TREE_CODE_CLASS (code
) == tcc_reference
3782 && arg0
&& TREE_THIS_VOLATILE (arg0
));
3789 build3_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
3790 tree arg2 MEM_STAT_DECL
)
3792 bool constant
, read_only
, side_effects
;
3795 gcc_assert (TREE_CODE_LENGTH (code
) == 3);
3796 gcc_assert (TREE_CODE_CLASS (code
) != tcc_vl_exp
);
3798 t
= make_node_stat (code PASS_MEM_STAT
);
3803 /* As a special exception, if COND_EXPR has NULL branches, we
3804 assume that it is a gimple statement and always consider
3805 it to have side effects. */
3806 if (code
== COND_EXPR
3807 && tt
== void_type_node
3808 && arg1
== NULL_TREE
3809 && arg2
== NULL_TREE
)
3810 side_effects
= true;
3812 side_effects
= TREE_SIDE_EFFECTS (t
);
3818 if (code
== COND_EXPR
)
3819 TREE_READONLY (t
) = read_only
;
3821 TREE_SIDE_EFFECTS (t
) = side_effects
;
3822 TREE_THIS_VOLATILE (t
)
3823 = (TREE_CODE_CLASS (code
) == tcc_reference
3824 && arg0
&& TREE_THIS_VOLATILE (arg0
));
3830 build4_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
3831 tree arg2
, tree arg3 MEM_STAT_DECL
)
3833 bool constant
, read_only
, side_effects
;
3836 gcc_assert (TREE_CODE_LENGTH (code
) == 4);
3838 t
= make_node_stat (code PASS_MEM_STAT
);
3841 side_effects
= TREE_SIDE_EFFECTS (t
);
3848 TREE_SIDE_EFFECTS (t
) = side_effects
;
3849 TREE_THIS_VOLATILE (t
)
3850 = (TREE_CODE_CLASS (code
) == tcc_reference
3851 && arg0
&& TREE_THIS_VOLATILE (arg0
));
3857 build5_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
3858 tree arg2
, tree arg3
, tree arg4 MEM_STAT_DECL
)
3860 bool constant
, read_only
, side_effects
;
3863 gcc_assert (TREE_CODE_LENGTH (code
) == 5);
3865 t
= make_node_stat (code PASS_MEM_STAT
);
3868 side_effects
= TREE_SIDE_EFFECTS (t
);
3876 TREE_SIDE_EFFECTS (t
) = side_effects
;
3877 TREE_THIS_VOLATILE (t
)
3878 = (TREE_CODE_CLASS (code
) == tcc_reference
3879 && arg0
&& TREE_THIS_VOLATILE (arg0
));
3885 build6_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
3886 tree arg2
, tree arg3
, tree arg4
, tree arg5 MEM_STAT_DECL
)
3888 bool constant
, read_only
, side_effects
;
3891 gcc_assert (code
== TARGET_MEM_REF
);
3893 t
= make_node_stat (code PASS_MEM_STAT
);
3896 side_effects
= TREE_SIDE_EFFECTS (t
);
3903 if (code
== TARGET_MEM_REF
)
3907 TREE_SIDE_EFFECTS (t
) = side_effects
;
3908 TREE_THIS_VOLATILE (t
)
3909 = (code
== TARGET_MEM_REF
3910 && arg5
&& TREE_THIS_VOLATILE (arg5
));
3915 /* Build a simple MEM_REF tree with the sematics of a plain INDIRECT_REF
3916 on the pointer PTR. */
3919 build_simple_mem_ref_loc (location_t loc
, tree ptr
)
3921 HOST_WIDE_INT offset
= 0;
3922 tree ptype
= TREE_TYPE (ptr
);
3924 /* For convenience allow addresses that collapse to a simple base
3926 if (TREE_CODE (ptr
) == ADDR_EXPR
3927 && (handled_component_p (TREE_OPERAND (ptr
, 0))
3928 || TREE_CODE (TREE_OPERAND (ptr
, 0)) == MEM_REF
))
3930 ptr
= get_addr_base_and_unit_offset (TREE_OPERAND (ptr
, 0), &offset
);
3932 ptr
= build_fold_addr_expr (ptr
);
3933 gcc_assert (is_gimple_reg (ptr
) || is_gimple_min_invariant (ptr
));
3935 tem
= build2 (MEM_REF
, TREE_TYPE (ptype
),
3936 ptr
, build_int_cst (ptype
, offset
));
3937 SET_EXPR_LOCATION (tem
, loc
);
3941 /* Return the constant offset of a MEM_REF or TARGET_MEM_REF tree T. */
3944 mem_ref_offset (const_tree t
)
3946 tree toff
= TREE_OPERAND (t
, 1);
3947 return double_int_sext (tree_to_double_int (toff
),
3948 TYPE_PRECISION (TREE_TYPE (toff
)));
3951 /* Return the pointer-type relevant for TBAA purposes from the
3952 gimple memory reference tree T. This is the type to be used for
3953 the offset operand of MEM_REF or TARGET_MEM_REF replacements of T. */
3956 reference_alias_ptr_type (const_tree t
)
3958 const_tree base
= t
;
3959 while (handled_component_p (base
))
3960 base
= TREE_OPERAND (base
, 0);
3961 if (TREE_CODE (base
) == MEM_REF
)
3962 return TREE_TYPE (TREE_OPERAND (base
, 1));
3963 else if (TREE_CODE (base
) == TARGET_MEM_REF
)
3964 return TREE_TYPE (TMR_OFFSET (base
));
3966 return build_pointer_type (TYPE_MAIN_VARIANT (TREE_TYPE (base
)));
3969 /* Return an invariant ADDR_EXPR of type TYPE taking the address of BASE
3970 offsetted by OFFSET units. */
3973 build_invariant_address (tree type
, tree base
, HOST_WIDE_INT offset
)
3975 tree ref
= fold_build2 (MEM_REF
, TREE_TYPE (type
),
3976 build_fold_addr_expr (base
),
3977 build_int_cst (ptr_type_node
, offset
));
3978 tree addr
= build1 (ADDR_EXPR
, type
, ref
);
3979 recompute_tree_invariant_for_addr_expr (addr
);
3983 /* Similar except don't specify the TREE_TYPE
3984 and leave the TREE_SIDE_EFFECTS as 0.
3985 It is permissible for arguments to be null,
3986 or even garbage if their values do not matter. */
3989 build_nt (enum tree_code code
, ...)
3996 gcc_assert (TREE_CODE_CLASS (code
) != tcc_vl_exp
);
4000 t
= make_node (code
);
4001 length
= TREE_CODE_LENGTH (code
);
4003 for (i
= 0; i
< length
; i
++)
4004 TREE_OPERAND (t
, i
) = va_arg (p
, tree
);
4010 /* Similar to build_nt, but for creating a CALL_EXPR object with a
4014 build_nt_call_vec (tree fn
, VEC(tree
,gc
) *args
)
4019 ret
= build_vl_exp (CALL_EXPR
, VEC_length (tree
, args
) + 3);
4020 CALL_EXPR_FN (ret
) = fn
;
4021 CALL_EXPR_STATIC_CHAIN (ret
) = NULL_TREE
;
4022 FOR_EACH_VEC_ELT (tree
, args
, ix
, t
)
4023 CALL_EXPR_ARG (ret
, ix
) = t
;
4027 /* Create a DECL_... node of code CODE, name NAME and data type TYPE.
4028 We do NOT enter this node in any sort of symbol table.
4030 LOC is the location of the decl.
4032 layout_decl is used to set up the decl's storage layout.
4033 Other slots are initialized to 0 or null pointers. */
4036 build_decl_stat (location_t loc
, enum tree_code code
, tree name
,
4037 tree type MEM_STAT_DECL
)
4041 t
= make_node_stat (code PASS_MEM_STAT
);
4042 DECL_SOURCE_LOCATION (t
) = loc
;
4044 /* if (type == error_mark_node)
4045 type = integer_type_node; */
4046 /* That is not done, deliberately, so that having error_mark_node
4047 as the type can suppress useless errors in the use of this variable. */
4049 DECL_NAME (t
) = name
;
4050 TREE_TYPE (t
) = type
;
4052 if (code
== VAR_DECL
|| code
== PARM_DECL
|| code
== RESULT_DECL
)
4058 /* Builds and returns function declaration with NAME and TYPE. */
4061 build_fn_decl (const char *name
, tree type
)
4063 tree id
= get_identifier (name
);
4064 tree decl
= build_decl (input_location
, FUNCTION_DECL
, id
, type
);
4066 DECL_EXTERNAL (decl
) = 1;
4067 TREE_PUBLIC (decl
) = 1;
4068 DECL_ARTIFICIAL (decl
) = 1;
4069 TREE_NOTHROW (decl
) = 1;
4074 VEC(tree
,gc
) *all_translation_units
;
4076 /* Builds a new translation-unit decl with name NAME, queues it in the
4077 global list of translation-unit decls and returns it. */
4080 build_translation_unit_decl (tree name
)
4082 tree tu
= build_decl (UNKNOWN_LOCATION
, TRANSLATION_UNIT_DECL
,
4084 TRANSLATION_UNIT_LANGUAGE (tu
) = lang_hooks
.name
;
4085 VEC_safe_push (tree
, gc
, all_translation_units
, tu
);
4090 /* BLOCK nodes are used to represent the structure of binding contours
4091 and declarations, once those contours have been exited and their contents
4092 compiled. This information is used for outputting debugging info. */
4095 build_block (tree vars
, tree subblocks
, tree supercontext
, tree chain
)
4097 tree block
= make_node (BLOCK
);
4099 BLOCK_VARS (block
) = vars
;
4100 BLOCK_SUBBLOCKS (block
) = subblocks
;
4101 BLOCK_SUPERCONTEXT (block
) = supercontext
;
4102 BLOCK_CHAIN (block
) = chain
;
4107 /* Like SET_EXPR_LOCATION, but make sure the tree can have a location.
4109 LOC is the location to use in tree T. */
4112 protected_set_expr_location (tree t
, location_t loc
)
4114 if (t
&& CAN_HAVE_LOCATION_P (t
))
4115 SET_EXPR_LOCATION (t
, loc
);
4118 /* Return a declaration like DDECL except that its DECL_ATTRIBUTES
4122 build_decl_attribute_variant (tree ddecl
, tree attribute
)
4124 DECL_ATTRIBUTES (ddecl
) = attribute
;
4128 /* Borrowed from hashtab.c iterative_hash implementation. */
4129 #define mix(a,b,c) \
4131 a -= b; a -= c; a ^= (c>>13); \
4132 b -= c; b -= a; b ^= (a<< 8); \
4133 c -= a; c -= b; c ^= ((b&0xffffffff)>>13); \
4134 a -= b; a -= c; a ^= ((c&0xffffffff)>>12); \
4135 b -= c; b -= a; b = (b ^ (a<<16)) & 0xffffffff; \
4136 c -= a; c -= b; c = (c ^ (b>> 5)) & 0xffffffff; \
4137 a -= b; a -= c; a = (a ^ (c>> 3)) & 0xffffffff; \
4138 b -= c; b -= a; b = (b ^ (a<<10)) & 0xffffffff; \
4139 c -= a; c -= b; c = (c ^ (b>>15)) & 0xffffffff; \
4143 /* Produce good hash value combining VAL and VAL2. */
4145 iterative_hash_hashval_t (hashval_t val
, hashval_t val2
)
4147 /* the golden ratio; an arbitrary value. */
4148 hashval_t a
= 0x9e3779b9;
4154 /* Produce good hash value combining VAL and VAL2. */
4156 iterative_hash_host_wide_int (HOST_WIDE_INT val
, hashval_t val2
)
4158 if (sizeof (HOST_WIDE_INT
) == sizeof (hashval_t
))
4159 return iterative_hash_hashval_t (val
, val2
);
4162 hashval_t a
= (hashval_t
) val
;
4163 /* Avoid warnings about shifting of more than the width of the type on
4164 hosts that won't execute this path. */
4166 hashval_t b
= (hashval_t
) (val
>> (sizeof (hashval_t
) * 8 + zero
));
4168 if (sizeof (HOST_WIDE_INT
) > 2 * sizeof (hashval_t
))
4170 hashval_t a
= (hashval_t
) (val
>> (sizeof (hashval_t
) * 16 + zero
));
4171 hashval_t b
= (hashval_t
) (val
>> (sizeof (hashval_t
) * 24 + zero
));
4178 /* Return a type like TTYPE except that its TYPE_ATTRIBUTE
4179 is ATTRIBUTE and its qualifiers are QUALS.
4181 Record such modified types already made so we don't make duplicates. */
4184 build_type_attribute_qual_variant (tree ttype
, tree attribute
, int quals
)
4186 if (! attribute_list_equal (TYPE_ATTRIBUTES (ttype
), attribute
))
4188 hashval_t hashcode
= 0;
4190 enum tree_code code
= TREE_CODE (ttype
);
4192 /* Building a distinct copy of a tagged type is inappropriate; it
4193 causes breakage in code that expects there to be a one-to-one
4194 relationship between a struct and its fields.
4195 build_duplicate_type is another solution (as used in
4196 handle_transparent_union_attribute), but that doesn't play well
4197 with the stronger C++ type identity model. */
4198 if (TREE_CODE (ttype
) == RECORD_TYPE
4199 || TREE_CODE (ttype
) == UNION_TYPE
4200 || TREE_CODE (ttype
) == QUAL_UNION_TYPE
4201 || TREE_CODE (ttype
) == ENUMERAL_TYPE
)
4203 warning (OPT_Wattributes
,
4204 "ignoring attributes applied to %qT after definition",
4205 TYPE_MAIN_VARIANT (ttype
));
4206 return build_qualified_type (ttype
, quals
);
4209 ttype
= build_qualified_type (ttype
, TYPE_UNQUALIFIED
);
4210 ntype
= build_distinct_type_copy (ttype
);
4212 TYPE_ATTRIBUTES (ntype
) = attribute
;
4214 hashcode
= iterative_hash_object (code
, hashcode
);
4215 if (TREE_TYPE (ntype
))
4216 hashcode
= iterative_hash_object (TYPE_HASH (TREE_TYPE (ntype
)),
4218 hashcode
= attribute_hash_list (attribute
, hashcode
);
4220 switch (TREE_CODE (ntype
))
4223 hashcode
= type_hash_list (TYPE_ARG_TYPES (ntype
), hashcode
);
4226 if (TYPE_DOMAIN (ntype
))
4227 hashcode
= iterative_hash_object (TYPE_HASH (TYPE_DOMAIN (ntype
)),
4231 hashcode
= iterative_hash_object
4232 (TREE_INT_CST_LOW (TYPE_MAX_VALUE (ntype
)), hashcode
);
4233 hashcode
= iterative_hash_object
4234 (TREE_INT_CST_HIGH (TYPE_MAX_VALUE (ntype
)), hashcode
);
4237 case FIXED_POINT_TYPE
:
4239 unsigned int precision
= TYPE_PRECISION (ntype
);
4240 hashcode
= iterative_hash_object (precision
, hashcode
);
4247 ntype
= type_hash_canon (hashcode
, ntype
);
4249 /* If the target-dependent attributes make NTYPE different from
4250 its canonical type, we will need to use structural equality
4251 checks for this type. */
4252 if (TYPE_STRUCTURAL_EQUALITY_P (ttype
)
4253 || !comp_type_attributes (ntype
, ttype
))
4254 SET_TYPE_STRUCTURAL_EQUALITY (ntype
);
4255 else if (TYPE_CANONICAL (ntype
) == ntype
)
4256 TYPE_CANONICAL (ntype
) = TYPE_CANONICAL (ttype
);
4258 ttype
= build_qualified_type (ntype
, quals
);
4260 else if (TYPE_QUALS (ttype
) != quals
)
4261 ttype
= build_qualified_type (ttype
, quals
);
4266 /* Compare two attributes for their value identity. Return true if the
4267 attribute values are known to be equal; otherwise return false.
4271 attribute_value_equal (const_tree attr1
, const_tree attr2
)
4273 if (TREE_VALUE (attr1
) == TREE_VALUE (attr2
))
4276 if (TREE_VALUE (attr1
) != NULL_TREE
4277 && TREE_CODE (TREE_VALUE (attr1
)) == TREE_LIST
4278 && TREE_VALUE (attr2
) != NULL
4279 && TREE_CODE (TREE_VALUE (attr2
)) == TREE_LIST
)
4280 return (simple_cst_list_equal (TREE_VALUE (attr1
),
4281 TREE_VALUE (attr2
)) == 1);
4283 return (simple_cst_equal (TREE_VALUE (attr1
), TREE_VALUE (attr2
)) == 1);
4286 /* Return 0 if the attributes for two types are incompatible, 1 if they
4287 are compatible, and 2 if they are nearly compatible (which causes a
4288 warning to be generated). */
4290 comp_type_attributes (const_tree type1
, const_tree type2
)
4292 const_tree a1
= TYPE_ATTRIBUTES (type1
);
4293 const_tree a2
= TYPE_ATTRIBUTES (type2
);
4298 for (a
= a1
; a
!= NULL_TREE
; a
= TREE_CHAIN (a
))
4300 const struct attribute_spec
*as
;
4303 as
= lookup_attribute_spec (TREE_PURPOSE (a
));
4304 if (!as
|| as
->affects_type_identity
== false)
4307 attr
= lookup_attribute (as
->name
, CONST_CAST_TREE (a2
));
4308 if (!attr
|| !attribute_value_equal (a
, attr
))
4313 for (a
= a2
; a
!= NULL_TREE
; a
= TREE_CHAIN (a
))
4315 const struct attribute_spec
*as
;
4317 as
= lookup_attribute_spec (TREE_PURPOSE (a
));
4318 if (!as
|| as
->affects_type_identity
== false)
4321 if (!lookup_attribute (as
->name
, CONST_CAST_TREE (a1
)))
4323 /* We don't need to compare trees again, as we did this
4324 already in first loop. */
4326 /* All types - affecting identity - are equal, so
4327 there is no need to call target hook for comparison. */
4331 /* As some type combinations - like default calling-convention - might
4332 be compatible, we have to call the target hook to get the final result. */
4333 return targetm
.comp_type_attributes (type1
, type2
);
4336 /* Return a type like TTYPE except that its TYPE_ATTRIBUTE
4339 Record such modified types already made so we don't make duplicates. */
4342 build_type_attribute_variant (tree ttype
, tree attribute
)
4344 return build_type_attribute_qual_variant (ttype
, attribute
,
4345 TYPE_QUALS (ttype
));
4349 /* Reset the expression *EXPR_P, a size or position.
4351 ??? We could reset all non-constant sizes or positions. But it's cheap
4352 enough to not do so and refrain from adding workarounds to dwarf2out.c.
4354 We need to reset self-referential sizes or positions because they cannot
4355 be gimplified and thus can contain a CALL_EXPR after the gimplification
4356 is finished, which will run afoul of LTO streaming. And they need to be
4357 reset to something essentially dummy but not constant, so as to preserve
4358 the properties of the object they are attached to. */
4361 free_lang_data_in_one_sizepos (tree
*expr_p
)
4363 tree expr
= *expr_p
;
4364 if (CONTAINS_PLACEHOLDER_P (expr
))
4365 *expr_p
= build0 (PLACEHOLDER_EXPR
, TREE_TYPE (expr
));
4369 /* Reset all the fields in a binfo node BINFO. We only keep
4370 BINFO_VIRTUALS, which is used by gimple_fold_obj_type_ref. */
4373 free_lang_data_in_binfo (tree binfo
)
4378 gcc_assert (TREE_CODE (binfo
) == TREE_BINFO
);
4380 BINFO_VTABLE (binfo
) = NULL_TREE
;
4381 BINFO_BASE_ACCESSES (binfo
) = NULL
;
4382 BINFO_INHERITANCE_CHAIN (binfo
) = NULL_TREE
;
4383 BINFO_SUBVTT_INDEX (binfo
) = NULL_TREE
;
4385 FOR_EACH_VEC_ELT (tree
, BINFO_BASE_BINFOS (binfo
), i
, t
)
4386 free_lang_data_in_binfo (t
);
4390 /* Reset all language specific information still present in TYPE. */
4393 free_lang_data_in_type (tree type
)
4395 gcc_assert (TYPE_P (type
));
4397 /* Give the FE a chance to remove its own data first. */
4398 lang_hooks
.free_lang_data (type
);
4400 TREE_LANG_FLAG_0 (type
) = 0;
4401 TREE_LANG_FLAG_1 (type
) = 0;
4402 TREE_LANG_FLAG_2 (type
) = 0;
4403 TREE_LANG_FLAG_3 (type
) = 0;
4404 TREE_LANG_FLAG_4 (type
) = 0;
4405 TREE_LANG_FLAG_5 (type
) = 0;
4406 TREE_LANG_FLAG_6 (type
) = 0;
4408 if (TREE_CODE (type
) == FUNCTION_TYPE
)
4410 /* Remove the const and volatile qualifiers from arguments. The
4411 C++ front end removes them, but the C front end does not,
4412 leading to false ODR violation errors when merging two
4413 instances of the same function signature compiled by
4414 different front ends. */
4417 for (p
= TYPE_ARG_TYPES (type
); p
; p
= TREE_CHAIN (p
))
4419 tree arg_type
= TREE_VALUE (p
);
4421 if (TYPE_READONLY (arg_type
) || TYPE_VOLATILE (arg_type
))
4423 int quals
= TYPE_QUALS (arg_type
)
4425 & ~TYPE_QUAL_VOLATILE
;
4426 TREE_VALUE (p
) = build_qualified_type (arg_type
, quals
);
4427 free_lang_data_in_type (TREE_VALUE (p
));
4432 /* Remove members that are not actually FIELD_DECLs from the field
4433 list of an aggregate. These occur in C++. */
4434 if (RECORD_OR_UNION_TYPE_P (type
))
4438 /* Note that TYPE_FIELDS can be shared across distinct
4439 TREE_TYPEs. Therefore, if the first field of TYPE_FIELDS is
4440 to be removed, we cannot set its TREE_CHAIN to NULL.
4441 Otherwise, we would not be able to find all the other fields
4442 in the other instances of this TREE_TYPE.
4444 This was causing an ICE in testsuite/g++.dg/lto/20080915.C. */
4446 member
= TYPE_FIELDS (type
);
4449 if (TREE_CODE (member
) == FIELD_DECL
)
4452 TREE_CHAIN (prev
) = member
;
4454 TYPE_FIELDS (type
) = member
;
4458 member
= TREE_CHAIN (member
);
4462 TREE_CHAIN (prev
) = NULL_TREE
;
4464 TYPE_FIELDS (type
) = NULL_TREE
;
4466 TYPE_METHODS (type
) = NULL_TREE
;
4467 if (TYPE_BINFO (type
))
4468 free_lang_data_in_binfo (TYPE_BINFO (type
));
4472 /* For non-aggregate types, clear out the language slot (which
4473 overloads TYPE_BINFO). */
4474 TYPE_LANG_SLOT_1 (type
) = NULL_TREE
;
4476 if (INTEGRAL_TYPE_P (type
)
4477 || SCALAR_FLOAT_TYPE_P (type
)
4478 || FIXED_POINT_TYPE_P (type
))
4480 free_lang_data_in_one_sizepos (&TYPE_MIN_VALUE (type
));
4481 free_lang_data_in_one_sizepos (&TYPE_MAX_VALUE (type
));
4485 free_lang_data_in_one_sizepos (&TYPE_SIZE (type
));
4486 free_lang_data_in_one_sizepos (&TYPE_SIZE_UNIT (type
));
4488 if (debug_info_level
< DINFO_LEVEL_TERSE
4489 || (TYPE_CONTEXT (type
)
4490 && TREE_CODE (TYPE_CONTEXT (type
)) != FUNCTION_DECL
4491 && TREE_CODE (TYPE_CONTEXT (type
)) != NAMESPACE_DECL
))
4492 TYPE_CONTEXT (type
) = NULL_TREE
;
4494 if (debug_info_level
< DINFO_LEVEL_TERSE
)
4495 TYPE_STUB_DECL (type
) = NULL_TREE
;
4499 /* Return true if DECL may need an assembler name to be set. */
4502 need_assembler_name_p (tree decl
)
4504 /* Only FUNCTION_DECLs and VAR_DECLs are considered. */
4505 if (TREE_CODE (decl
) != FUNCTION_DECL
4506 && TREE_CODE (decl
) != VAR_DECL
)
4509 /* If DECL already has its assembler name set, it does not need a
4511 if (!HAS_DECL_ASSEMBLER_NAME_P (decl
)
4512 || DECL_ASSEMBLER_NAME_SET_P (decl
))
4515 /* Abstract decls do not need an assembler name. */
4516 if (DECL_ABSTRACT (decl
))
4519 /* For VAR_DECLs, only static, public and external symbols need an
4521 if (TREE_CODE (decl
) == VAR_DECL
4522 && !TREE_STATIC (decl
)
4523 && !TREE_PUBLIC (decl
)
4524 && !DECL_EXTERNAL (decl
))
4527 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4529 /* Do not set assembler name on builtins. Allow RTL expansion to
4530 decide whether to expand inline or via a regular call. */
4531 if (DECL_BUILT_IN (decl
)
4532 && DECL_BUILT_IN_CLASS (decl
) != BUILT_IN_FRONTEND
)
4535 /* Functions represented in the callgraph need an assembler name. */
4536 if (cgraph_get_node (decl
) != NULL
)
4539 /* Unused and not public functions don't need an assembler name. */
4540 if (!TREE_USED (decl
) && !TREE_PUBLIC (decl
))
4548 /* Reset all language specific information still present in symbol
4552 free_lang_data_in_decl (tree decl
)
4554 gcc_assert (DECL_P (decl
));
4556 /* Give the FE a chance to remove its own data first. */
4557 lang_hooks
.free_lang_data (decl
);
4559 TREE_LANG_FLAG_0 (decl
) = 0;
4560 TREE_LANG_FLAG_1 (decl
) = 0;
4561 TREE_LANG_FLAG_2 (decl
) = 0;
4562 TREE_LANG_FLAG_3 (decl
) = 0;
4563 TREE_LANG_FLAG_4 (decl
) = 0;
4564 TREE_LANG_FLAG_5 (decl
) = 0;
4565 TREE_LANG_FLAG_6 (decl
) = 0;
4567 free_lang_data_in_one_sizepos (&DECL_SIZE (decl
));
4568 free_lang_data_in_one_sizepos (&DECL_SIZE_UNIT (decl
));
4569 if (TREE_CODE (decl
) == FIELD_DECL
)
4570 free_lang_data_in_one_sizepos (&DECL_FIELD_OFFSET (decl
));
4572 /* DECL_FCONTEXT is only used for debug info generation. */
4573 if (TREE_CODE (decl
) == FIELD_DECL
4574 && debug_info_level
< DINFO_LEVEL_TERSE
)
4575 DECL_FCONTEXT (decl
) = NULL_TREE
;
4577 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4579 if (gimple_has_body_p (decl
))
4583 /* If DECL has a gimple body, then the context for its
4584 arguments must be DECL. Otherwise, it doesn't really
4585 matter, as we will not be emitting any code for DECL. In
4586 general, there may be other instances of DECL created by
4587 the front end and since PARM_DECLs are generally shared,
4588 their DECL_CONTEXT changes as the replicas of DECL are
4589 created. The only time where DECL_CONTEXT is important
4590 is for the FUNCTION_DECLs that have a gimple body (since
4591 the PARM_DECL will be used in the function's body). */
4592 for (t
= DECL_ARGUMENTS (decl
); t
; t
= TREE_CHAIN (t
))
4593 DECL_CONTEXT (t
) = decl
;
4596 /* DECL_SAVED_TREE holds the GENERIC representation for DECL.
4597 At this point, it is not needed anymore. */
4598 DECL_SAVED_TREE (decl
) = NULL_TREE
;
4600 /* Clear the abstract origin if it refers to a method. Otherwise
4601 dwarf2out.c will ICE as we clear TYPE_METHODS and thus the
4602 origin will not be output correctly. */
4603 if (DECL_ABSTRACT_ORIGIN (decl
)
4604 && DECL_CONTEXT (DECL_ABSTRACT_ORIGIN (decl
))
4605 && RECORD_OR_UNION_TYPE_P
4606 (DECL_CONTEXT (DECL_ABSTRACT_ORIGIN (decl
))))
4607 DECL_ABSTRACT_ORIGIN (decl
) = NULL_TREE
;
4609 /* Sometimes the C++ frontend doesn't manage to transform a temporary
4610 DECL_VINDEX referring to itself into a vtable slot number as it
4611 should. Happens with functions that are copied and then forgotten
4612 about. Just clear it, it won't matter anymore. */
4613 if (DECL_VINDEX (decl
) && !host_integerp (DECL_VINDEX (decl
), 0))
4614 DECL_VINDEX (decl
) = NULL_TREE
;
4616 else if (TREE_CODE (decl
) == VAR_DECL
)
4618 if ((DECL_EXTERNAL (decl
)
4619 && (!TREE_STATIC (decl
) || !TREE_READONLY (decl
)))
4620 || (decl_function_context (decl
) && !TREE_STATIC (decl
)))
4621 DECL_INITIAL (decl
) = NULL_TREE
;
4623 else if (TREE_CODE (decl
) == TYPE_DECL
)
4624 DECL_INITIAL (decl
) = NULL_TREE
;
4625 else if (TREE_CODE (decl
) == TRANSLATION_UNIT_DECL
4626 && DECL_INITIAL (decl
)
4627 && TREE_CODE (DECL_INITIAL (decl
)) == BLOCK
)
4629 /* Strip builtins from the translation-unit BLOCK. We still have
4630 targets without builtin_decl support and also builtins are
4631 shared nodes and thus we can't use TREE_CHAIN in multiple
4633 tree
*nextp
= &BLOCK_VARS (DECL_INITIAL (decl
));
4637 if (TREE_CODE (var
) == FUNCTION_DECL
4638 && DECL_BUILT_IN (var
))
4639 *nextp
= TREE_CHAIN (var
);
4641 nextp
= &TREE_CHAIN (var
);
4647 /* Data used when collecting DECLs and TYPEs for language data removal. */
4649 struct free_lang_data_d
4651 /* Worklist to avoid excessive recursion. */
4652 VEC(tree
,heap
) *worklist
;
4654 /* Set of traversed objects. Used to avoid duplicate visits. */
4655 struct pointer_set_t
*pset
;
4657 /* Array of symbols to process with free_lang_data_in_decl. */
4658 VEC(tree
,heap
) *decls
;
4660 /* Array of types to process with free_lang_data_in_type. */
4661 VEC(tree
,heap
) *types
;
4665 /* Save all language fields needed to generate proper debug information
4666 for DECL. This saves most fields cleared out by free_lang_data_in_decl. */
4669 save_debug_info_for_decl (tree t
)
4671 /*struct saved_debug_info_d *sdi;*/
4673 gcc_assert (debug_info_level
> DINFO_LEVEL_TERSE
&& t
&& DECL_P (t
));
4675 /* FIXME. Partial implementation for saving debug info removed. */
4679 /* Save all language fields needed to generate proper debug information
4680 for TYPE. This saves most fields cleared out by free_lang_data_in_type. */
4683 save_debug_info_for_type (tree t
)
4685 /*struct saved_debug_info_d *sdi;*/
4687 gcc_assert (debug_info_level
> DINFO_LEVEL_TERSE
&& t
&& TYPE_P (t
));
4689 /* FIXME. Partial implementation for saving debug info removed. */
4693 /* Add type or decl T to one of the list of tree nodes that need their
4694 language data removed. The lists are held inside FLD. */
4697 add_tree_to_fld_list (tree t
, struct free_lang_data_d
*fld
)
4701 VEC_safe_push (tree
, heap
, fld
->decls
, t
);
4702 if (debug_info_level
> DINFO_LEVEL_TERSE
)
4703 save_debug_info_for_decl (t
);
4705 else if (TYPE_P (t
))
4707 VEC_safe_push (tree
, heap
, fld
->types
, t
);
4708 if (debug_info_level
> DINFO_LEVEL_TERSE
)
4709 save_debug_info_for_type (t
);
4715 /* Push tree node T into FLD->WORKLIST. */
4718 fld_worklist_push (tree t
, struct free_lang_data_d
*fld
)
4720 if (t
&& !is_lang_specific (t
) && !pointer_set_contains (fld
->pset
, t
))
4721 VEC_safe_push (tree
, heap
, fld
->worklist
, (t
));
4725 /* Operand callback helper for free_lang_data_in_node. *TP is the
4726 subtree operand being considered. */
4729 find_decls_types_r (tree
*tp
, int *ws
, void *data
)
4732 struct free_lang_data_d
*fld
= (struct free_lang_data_d
*) data
;
4734 if (TREE_CODE (t
) == TREE_LIST
)
4737 /* Language specific nodes will be removed, so there is no need
4738 to gather anything under them. */
4739 if (is_lang_specific (t
))
4747 /* Note that walk_tree does not traverse every possible field in
4748 decls, so we have to do our own traversals here. */
4749 add_tree_to_fld_list (t
, fld
);
4751 fld_worklist_push (DECL_NAME (t
), fld
);
4752 fld_worklist_push (DECL_CONTEXT (t
), fld
);
4753 fld_worklist_push (DECL_SIZE (t
), fld
);
4754 fld_worklist_push (DECL_SIZE_UNIT (t
), fld
);
4756 /* We are going to remove everything under DECL_INITIAL for
4757 TYPE_DECLs. No point walking them. */
4758 if (TREE_CODE (t
) != TYPE_DECL
)
4759 fld_worklist_push (DECL_INITIAL (t
), fld
);
4761 fld_worklist_push (DECL_ATTRIBUTES (t
), fld
);
4762 fld_worklist_push (DECL_ABSTRACT_ORIGIN (t
), fld
);
4764 if (TREE_CODE (t
) == FUNCTION_DECL
)
4766 fld_worklist_push (DECL_ARGUMENTS (t
), fld
);
4767 fld_worklist_push (DECL_RESULT (t
), fld
);
4769 else if (TREE_CODE (t
) == TYPE_DECL
)
4771 fld_worklist_push (DECL_ARGUMENT_FLD (t
), fld
);
4772 fld_worklist_push (DECL_VINDEX (t
), fld
);
4774 else if (TREE_CODE (t
) == FIELD_DECL
)
4776 fld_worklist_push (DECL_FIELD_OFFSET (t
), fld
);
4777 fld_worklist_push (DECL_BIT_FIELD_TYPE (t
), fld
);
4778 fld_worklist_push (DECL_QUALIFIER (t
), fld
);
4779 fld_worklist_push (DECL_FIELD_BIT_OFFSET (t
), fld
);
4780 fld_worklist_push (DECL_FCONTEXT (t
), fld
);
4782 else if (TREE_CODE (t
) == VAR_DECL
)
4784 fld_worklist_push (DECL_SECTION_NAME (t
), fld
);
4785 fld_worklist_push (DECL_COMDAT_GROUP (t
), fld
);
4788 if ((TREE_CODE (t
) == VAR_DECL
|| TREE_CODE (t
) == PARM_DECL
)
4789 && DECL_HAS_VALUE_EXPR_P (t
))
4790 fld_worklist_push (DECL_VALUE_EXPR (t
), fld
);
4792 if (TREE_CODE (t
) != FIELD_DECL
4793 && TREE_CODE (t
) != TYPE_DECL
)
4794 fld_worklist_push (TREE_CHAIN (t
), fld
);
4797 else if (TYPE_P (t
))
4799 /* Note that walk_tree does not traverse every possible field in
4800 types, so we have to do our own traversals here. */
4801 add_tree_to_fld_list (t
, fld
);
4803 if (!RECORD_OR_UNION_TYPE_P (t
))
4804 fld_worklist_push (TYPE_CACHED_VALUES (t
), fld
);
4805 fld_worklist_push (TYPE_SIZE (t
), fld
);
4806 fld_worklist_push (TYPE_SIZE_UNIT (t
), fld
);
4807 fld_worklist_push (TYPE_ATTRIBUTES (t
), fld
);
4808 fld_worklist_push (TYPE_POINTER_TO (t
), fld
);
4809 fld_worklist_push (TYPE_REFERENCE_TO (t
), fld
);
4810 fld_worklist_push (TYPE_NAME (t
), fld
);
4811 /* Do not walk TYPE_NEXT_PTR_TO or TYPE_NEXT_REF_TO. We do not stream
4812 them and thus do not and want not to reach unused pointer types
4814 if (!POINTER_TYPE_P (t
))
4815 fld_worklist_push (TYPE_MINVAL (t
), fld
);
4816 if (!RECORD_OR_UNION_TYPE_P (t
))
4817 fld_worklist_push (TYPE_MAXVAL (t
), fld
);
4818 fld_worklist_push (TYPE_MAIN_VARIANT (t
), fld
);
4819 /* Do not walk TYPE_NEXT_VARIANT. We do not stream it and thus
4820 do not and want not to reach unused variants this way. */
4821 fld_worklist_push (TYPE_CONTEXT (t
), fld
);
4822 /* Do not walk TYPE_CANONICAL. We do not stream it and thus do not
4823 and want not to reach unused types this way. */
4825 if (RECORD_OR_UNION_TYPE_P (t
) && TYPE_BINFO (t
))
4829 for (i
= 0; VEC_iterate (tree
, BINFO_BASE_BINFOS (TYPE_BINFO (t
)),
4831 fld_worklist_push (TREE_TYPE (tem
), fld
);
4832 tem
= BINFO_VIRTUALS (TYPE_BINFO (t
));
4834 /* The Java FE overloads BINFO_VIRTUALS for its own purpose. */
4835 && TREE_CODE (tem
) == TREE_LIST
)
4838 fld_worklist_push (TREE_VALUE (tem
), fld
);
4839 tem
= TREE_CHAIN (tem
);
4843 if (RECORD_OR_UNION_TYPE_P (t
))
4846 /* Push all TYPE_FIELDS - there can be interleaving interesting
4847 and non-interesting things. */
4848 tem
= TYPE_FIELDS (t
);
4851 if (TREE_CODE (tem
) == FIELD_DECL
)
4852 fld_worklist_push (tem
, fld
);
4853 tem
= TREE_CHAIN (tem
);
4857 fld_worklist_push (TREE_CHAIN (t
), fld
);
4860 else if (TREE_CODE (t
) == BLOCK
)
4863 for (tem
= BLOCK_VARS (t
); tem
; tem
= TREE_CHAIN (tem
))
4864 fld_worklist_push (tem
, fld
);
4865 for (tem
= BLOCK_SUBBLOCKS (t
); tem
; tem
= BLOCK_CHAIN (tem
))
4866 fld_worklist_push (tem
, fld
);
4867 fld_worklist_push (BLOCK_ABSTRACT_ORIGIN (t
), fld
);
4870 if (TREE_CODE (t
) != IDENTIFIER_NODE
)
4871 fld_worklist_push (TREE_TYPE (t
), fld
);
4877 /* Find decls and types in T. */
4880 find_decls_types (tree t
, struct free_lang_data_d
*fld
)
4884 if (!pointer_set_contains (fld
->pset
, t
))
4885 walk_tree (&t
, find_decls_types_r
, fld
, fld
->pset
);
4886 if (VEC_empty (tree
, fld
->worklist
))
4888 t
= VEC_pop (tree
, fld
->worklist
);
4892 /* Translate all the types in LIST with the corresponding runtime
4896 get_eh_types_for_runtime (tree list
)
4900 if (list
== NULL_TREE
)
4903 head
= build_tree_list (0, lookup_type_for_runtime (TREE_VALUE (list
)));
4905 list
= TREE_CHAIN (list
);
4908 tree n
= build_tree_list (0, lookup_type_for_runtime (TREE_VALUE (list
)));
4909 TREE_CHAIN (prev
) = n
;
4910 prev
= TREE_CHAIN (prev
);
4911 list
= TREE_CHAIN (list
);
4918 /* Find decls and types referenced in EH region R and store them in
4919 FLD->DECLS and FLD->TYPES. */
4922 find_decls_types_in_eh_region (eh_region r
, struct free_lang_data_d
*fld
)
4933 /* The types referenced in each catch must first be changed to the
4934 EH types used at runtime. This removes references to FE types
4936 for (c
= r
->u
.eh_try
.first_catch
; c
; c
= c
->next_catch
)
4938 c
->type_list
= get_eh_types_for_runtime (c
->type_list
);
4939 walk_tree (&c
->type_list
, find_decls_types_r
, fld
, fld
->pset
);
4944 case ERT_ALLOWED_EXCEPTIONS
:
4945 r
->u
.allowed
.type_list
4946 = get_eh_types_for_runtime (r
->u
.allowed
.type_list
);
4947 walk_tree (&r
->u
.allowed
.type_list
, find_decls_types_r
, fld
, fld
->pset
);
4950 case ERT_MUST_NOT_THROW
:
4951 walk_tree (&r
->u
.must_not_throw
.failure_decl
,
4952 find_decls_types_r
, fld
, fld
->pset
);
4958 /* Find decls and types referenced in cgraph node N and store them in
4959 FLD->DECLS and FLD->TYPES. Unlike pass_referenced_vars, this will
4960 look for *every* kind of DECL and TYPE node reachable from N,
4961 including those embedded inside types and decls (i.e,, TYPE_DECLs,
4962 NAMESPACE_DECLs, etc). */
4965 find_decls_types_in_node (struct cgraph_node
*n
, struct free_lang_data_d
*fld
)
4968 struct function
*fn
;
4972 find_decls_types (n
->decl
, fld
);
4974 if (!gimple_has_body_p (n
->decl
))
4977 gcc_assert (current_function_decl
== NULL_TREE
&& cfun
== NULL
);
4979 fn
= DECL_STRUCT_FUNCTION (n
->decl
);
4981 /* Traverse locals. */
4982 FOR_EACH_LOCAL_DECL (fn
, ix
, t
)
4983 find_decls_types (t
, fld
);
4985 /* Traverse EH regions in FN. */
4988 FOR_ALL_EH_REGION_FN (r
, fn
)
4989 find_decls_types_in_eh_region (r
, fld
);
4992 /* Traverse every statement in FN. */
4993 FOR_EACH_BB_FN (bb
, fn
)
4995 gimple_stmt_iterator si
;
4998 for (si
= gsi_start_phis (bb
); !gsi_end_p (si
); gsi_next (&si
))
5000 gimple phi
= gsi_stmt (si
);
5002 for (i
= 0; i
< gimple_phi_num_args (phi
); i
++)
5004 tree
*arg_p
= gimple_phi_arg_def_ptr (phi
, i
);
5005 find_decls_types (*arg_p
, fld
);
5009 for (si
= gsi_start_bb (bb
); !gsi_end_p (si
); gsi_next (&si
))
5011 gimple stmt
= gsi_stmt (si
);
5013 for (i
= 0; i
< gimple_num_ops (stmt
); i
++)
5015 tree arg
= gimple_op (stmt
, i
);
5016 find_decls_types (arg
, fld
);
5023 /* Find decls and types referenced in varpool node N and store them in
5024 FLD->DECLS and FLD->TYPES. Unlike pass_referenced_vars, this will
5025 look for *every* kind of DECL and TYPE node reachable from N,
5026 including those embedded inside types and decls (i.e,, TYPE_DECLs,
5027 NAMESPACE_DECLs, etc). */
5030 find_decls_types_in_var (struct varpool_node
*v
, struct free_lang_data_d
*fld
)
5032 find_decls_types (v
->decl
, fld
);
5035 /* If T needs an assembler name, have one created for it. */
5038 assign_assembler_name_if_neeeded (tree t
)
5040 if (need_assembler_name_p (t
))
5042 /* When setting DECL_ASSEMBLER_NAME, the C++ mangler may emit
5043 diagnostics that use input_location to show locus
5044 information. The problem here is that, at this point,
5045 input_location is generally anchored to the end of the file
5046 (since the parser is long gone), so we don't have a good
5047 position to pin it to.
5049 To alleviate this problem, this uses the location of T's
5050 declaration. Examples of this are
5051 testsuite/g++.dg/template/cond2.C and
5052 testsuite/g++.dg/template/pr35240.C. */
5053 location_t saved_location
= input_location
;
5054 input_location
= DECL_SOURCE_LOCATION (t
);
5056 decl_assembler_name (t
);
5058 input_location
= saved_location
;
5063 /* Free language specific information for every operand and expression
5064 in every node of the call graph. This process operates in three stages:
5066 1- Every callgraph node and varpool node is traversed looking for
5067 decls and types embedded in them. This is a more exhaustive
5068 search than that done by find_referenced_vars, because it will
5069 also collect individual fields, decls embedded in types, etc.
5071 2- All the decls found are sent to free_lang_data_in_decl.
5073 3- All the types found are sent to free_lang_data_in_type.
5075 The ordering between decls and types is important because
5076 free_lang_data_in_decl sets assembler names, which includes
5077 mangling. So types cannot be freed up until assembler names have
5081 free_lang_data_in_cgraph (void)
5083 struct cgraph_node
*n
;
5084 struct varpool_node
*v
;
5085 struct free_lang_data_d fld
;
5090 /* Initialize sets and arrays to store referenced decls and types. */
5091 fld
.pset
= pointer_set_create ();
5092 fld
.worklist
= NULL
;
5093 fld
.decls
= VEC_alloc (tree
, heap
, 100);
5094 fld
.types
= VEC_alloc (tree
, heap
, 100);
5096 /* Find decls and types in the body of every function in the callgraph. */
5097 for (n
= cgraph_nodes
; n
; n
= n
->next
)
5098 find_decls_types_in_node (n
, &fld
);
5100 FOR_EACH_VEC_ELT (alias_pair
, alias_pairs
, i
, p
)
5101 find_decls_types (p
->decl
, &fld
);
5103 /* Find decls and types in every varpool symbol. */
5104 for (v
= varpool_nodes
; v
; v
= v
->next
)
5105 find_decls_types_in_var (v
, &fld
);
5107 /* Set the assembler name on every decl found. We need to do this
5108 now because free_lang_data_in_decl will invalidate data needed
5109 for mangling. This breaks mangling on interdependent decls. */
5110 FOR_EACH_VEC_ELT (tree
, fld
.decls
, i
, t
)
5111 assign_assembler_name_if_neeeded (t
);
5113 /* Traverse every decl found freeing its language data. */
5114 FOR_EACH_VEC_ELT (tree
, fld
.decls
, i
, t
)
5115 free_lang_data_in_decl (t
);
5117 /* Traverse every type found freeing its language data. */
5118 FOR_EACH_VEC_ELT (tree
, fld
.types
, i
, t
)
5119 free_lang_data_in_type (t
);
5121 pointer_set_destroy (fld
.pset
);
5122 VEC_free (tree
, heap
, fld
.worklist
);
5123 VEC_free (tree
, heap
, fld
.decls
);
5124 VEC_free (tree
, heap
, fld
.types
);
5128 /* Free resources that are used by FE but are not needed once they are done. */
5131 free_lang_data (void)
5135 /* If we are the LTO frontend we have freed lang-specific data already. */
5137 || !flag_generate_lto
)
5140 /* Allocate and assign alias sets to the standard integer types
5141 while the slots are still in the way the frontends generated them. */
5142 for (i
= 0; i
< itk_none
; ++i
)
5143 if (integer_types
[i
])
5144 TYPE_ALIAS_SET (integer_types
[i
]) = get_alias_set (integer_types
[i
]);
5146 /* Traverse the IL resetting language specific information for
5147 operands, expressions, etc. */
5148 free_lang_data_in_cgraph ();
5150 /* Create gimple variants for common types. */
5151 ptrdiff_type_node
= integer_type_node
;
5152 fileptr_type_node
= ptr_type_node
;
5153 if (TREE_CODE (boolean_type_node
) != BOOLEAN_TYPE
5154 || (TYPE_MODE (boolean_type_node
)
5155 != mode_for_size (BOOL_TYPE_SIZE
, MODE_INT
, 0))
5156 || TYPE_PRECISION (boolean_type_node
) != 1
5157 || !TYPE_UNSIGNED (boolean_type_node
))
5159 boolean_type_node
= make_unsigned_type (BOOL_TYPE_SIZE
);
5160 TREE_SET_CODE (boolean_type_node
, BOOLEAN_TYPE
);
5161 TYPE_MAX_VALUE (boolean_type_node
) = build_int_cst (boolean_type_node
, 1);
5162 TYPE_PRECISION (boolean_type_node
) = 1;
5163 boolean_false_node
= TYPE_MIN_VALUE (boolean_type_node
);
5164 boolean_true_node
= TYPE_MAX_VALUE (boolean_type_node
);
5167 /* Unify char_type_node with its properly signed variant. */
5168 if (TYPE_UNSIGNED (char_type_node
))
5169 unsigned_char_type_node
= char_type_node
;
5171 signed_char_type_node
= char_type_node
;
5173 /* Reset some langhooks. Do not reset types_compatible_p, it may
5174 still be used indirectly via the get_alias_set langhook. */
5175 lang_hooks
.callgraph
.analyze_expr
= NULL
;
5176 lang_hooks
.dwarf_name
= lhd_dwarf_name
;
5177 lang_hooks
.decl_printable_name
= gimple_decl_printable_name
;
5178 /* We do not want the default decl_assembler_name implementation,
5179 rather if we have fixed everything we want a wrapper around it
5180 asserting that all non-local symbols already got their assembler
5181 name and only produce assembler names for local symbols. Or rather
5182 make sure we never call decl_assembler_name on local symbols and
5183 devise a separate, middle-end private scheme for it. */
5185 /* Reset diagnostic machinery. */
5186 diagnostic_starter (global_dc
) = default_tree_diagnostic_starter
;
5187 diagnostic_finalizer (global_dc
) = default_diagnostic_finalizer
;
5188 diagnostic_format_decoder (global_dc
) = default_tree_printer
;
5194 struct simple_ipa_opt_pass pass_ipa_free_lang_data
=
5198 "*free_lang_data", /* name */
5200 free_lang_data
, /* execute */
5203 0, /* static_pass_number */
5204 TV_IPA_FREE_LANG_DATA
, /* tv_id */
5205 0, /* properties_required */
5206 0, /* properties_provided */
5207 0, /* properties_destroyed */
5208 0, /* todo_flags_start */
5209 TODO_ggc_collect
/* todo_flags_finish */
5213 /* Return nonzero if IDENT is a valid name for attribute ATTR,
5216 We try both `text' and `__text__', ATTR may be either one. */
5217 /* ??? It might be a reasonable simplification to require ATTR to be only
5218 `text'. One might then also require attribute lists to be stored in
5219 their canonicalized form. */
5222 is_attribute_with_length_p (const char *attr
, int attr_len
, const_tree ident
)
5227 if (TREE_CODE (ident
) != IDENTIFIER_NODE
)
5230 p
= IDENTIFIER_POINTER (ident
);
5231 ident_len
= IDENTIFIER_LENGTH (ident
);
5233 if (ident_len
== attr_len
5234 && strcmp (attr
, p
) == 0)
5237 /* If ATTR is `__text__', IDENT must be `text'; and vice versa. */
5240 gcc_assert (attr
[1] == '_');
5241 gcc_assert (attr
[attr_len
- 2] == '_');
5242 gcc_assert (attr
[attr_len
- 1] == '_');
5243 if (ident_len
== attr_len
- 4
5244 && strncmp (attr
+ 2, p
, attr_len
- 4) == 0)
5249 if (ident_len
== attr_len
+ 4
5250 && p
[0] == '_' && p
[1] == '_'
5251 && p
[ident_len
- 2] == '_' && p
[ident_len
- 1] == '_'
5252 && strncmp (attr
, p
+ 2, attr_len
) == 0)
5259 /* Return nonzero if IDENT is a valid name for attribute ATTR,
5262 We try both `text' and `__text__', ATTR may be either one. */
5265 is_attribute_p (const char *attr
, const_tree ident
)
5267 return is_attribute_with_length_p (attr
, strlen (attr
), ident
);
5270 /* Given an attribute name and a list of attributes, return a pointer to the
5271 attribute's list element if the attribute is part of the list, or NULL_TREE
5272 if not found. If the attribute appears more than once, this only
5273 returns the first occurrence; the TREE_CHAIN of the return value should
5274 be passed back in if further occurrences are wanted. */
5277 lookup_attribute (const char *attr_name
, tree list
)
5280 size_t attr_len
= strlen (attr_name
);
5282 for (l
= list
; l
; l
= TREE_CHAIN (l
))
5284 gcc_assert (TREE_CODE (TREE_PURPOSE (l
)) == IDENTIFIER_NODE
);
5285 if (is_attribute_with_length_p (attr_name
, attr_len
, TREE_PURPOSE (l
)))
5291 /* Remove any instances of attribute ATTR_NAME in LIST and return the
5295 remove_attribute (const char *attr_name
, tree list
)
5298 size_t attr_len
= strlen (attr_name
);
5300 for (p
= &list
; *p
; )
5303 gcc_assert (TREE_CODE (TREE_PURPOSE (l
)) == IDENTIFIER_NODE
);
5304 if (is_attribute_with_length_p (attr_name
, attr_len
, TREE_PURPOSE (l
)))
5305 *p
= TREE_CHAIN (l
);
5307 p
= &TREE_CHAIN (l
);
5313 /* Return an attribute list that is the union of a1 and a2. */
5316 merge_attributes (tree a1
, tree a2
)
5320 /* Either one unset? Take the set one. */
5322 if ((attributes
= a1
) == 0)
5325 /* One that completely contains the other? Take it. */
5327 else if (a2
!= 0 && ! attribute_list_contained (a1
, a2
))
5329 if (attribute_list_contained (a2
, a1
))
5333 /* Pick the longest list, and hang on the other list. */
5335 if (list_length (a1
) < list_length (a2
))
5336 attributes
= a2
, a2
= a1
;
5338 for (; a2
!= 0; a2
= TREE_CHAIN (a2
))
5341 for (a
= lookup_attribute (IDENTIFIER_POINTER (TREE_PURPOSE (a2
)),
5343 a
!= NULL_TREE
&& !attribute_value_equal (a
, a2
);
5344 a
= lookup_attribute (IDENTIFIER_POINTER (TREE_PURPOSE (a2
)),
5349 a1
= copy_node (a2
);
5350 TREE_CHAIN (a1
) = attributes
;
5359 /* Given types T1 and T2, merge their attributes and return
5363 merge_type_attributes (tree t1
, tree t2
)
5365 return merge_attributes (TYPE_ATTRIBUTES (t1
),
5366 TYPE_ATTRIBUTES (t2
));
5369 /* Given decls OLDDECL and NEWDECL, merge their attributes and return
5373 merge_decl_attributes (tree olddecl
, tree newdecl
)
5375 return merge_attributes (DECL_ATTRIBUTES (olddecl
),
5376 DECL_ATTRIBUTES (newdecl
));
5379 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
5381 /* Specialization of merge_decl_attributes for various Windows targets.
5383 This handles the following situation:
5385 __declspec (dllimport) int foo;
5388 The second instance of `foo' nullifies the dllimport. */
5391 merge_dllimport_decl_attributes (tree old
, tree new_tree
)
5394 int delete_dllimport_p
= 1;
5396 /* What we need to do here is remove from `old' dllimport if it doesn't
5397 appear in `new'. dllimport behaves like extern: if a declaration is
5398 marked dllimport and a definition appears later, then the object
5399 is not dllimport'd. We also remove a `new' dllimport if the old list
5400 contains dllexport: dllexport always overrides dllimport, regardless
5401 of the order of declaration. */
5402 if (!VAR_OR_FUNCTION_DECL_P (new_tree
))
5403 delete_dllimport_p
= 0;
5404 else if (DECL_DLLIMPORT_P (new_tree
)
5405 && lookup_attribute ("dllexport", DECL_ATTRIBUTES (old
)))
5407 DECL_DLLIMPORT_P (new_tree
) = 0;
5408 warning (OPT_Wattributes
, "%q+D already declared with dllexport attribute: "
5409 "dllimport ignored", new_tree
);
5411 else if (DECL_DLLIMPORT_P (old
) && !DECL_DLLIMPORT_P (new_tree
))
5413 /* Warn about overriding a symbol that has already been used, e.g.:
5414 extern int __attribute__ ((dllimport)) foo;
5415 int* bar () {return &foo;}
5418 if (TREE_USED (old
))
5420 warning (0, "%q+D redeclared without dllimport attribute "
5421 "after being referenced with dll linkage", new_tree
);
5422 /* If we have used a variable's address with dllimport linkage,
5423 keep the old DECL_DLLIMPORT_P flag: the ADDR_EXPR using the
5424 decl may already have had TREE_CONSTANT computed.
5425 We still remove the attribute so that assembler code refers
5426 to '&foo rather than '_imp__foo'. */
5427 if (TREE_CODE (old
) == VAR_DECL
&& TREE_ADDRESSABLE (old
))
5428 DECL_DLLIMPORT_P (new_tree
) = 1;
5431 /* Let an inline definition silently override the external reference,
5432 but otherwise warn about attribute inconsistency. */
5433 else if (TREE_CODE (new_tree
) == VAR_DECL
5434 || !DECL_DECLARED_INLINE_P (new_tree
))
5435 warning (OPT_Wattributes
, "%q+D redeclared without dllimport attribute: "
5436 "previous dllimport ignored", new_tree
);
5439 delete_dllimport_p
= 0;
5441 a
= merge_attributes (DECL_ATTRIBUTES (old
), DECL_ATTRIBUTES (new_tree
));
5443 if (delete_dllimport_p
)
5446 const size_t attr_len
= strlen ("dllimport");
5448 /* Scan the list for dllimport and delete it. */
5449 for (prev
= NULL_TREE
, t
= a
; t
; prev
= t
, t
= TREE_CHAIN (t
))
5451 if (is_attribute_with_length_p ("dllimport", attr_len
,
5454 if (prev
== NULL_TREE
)
5457 TREE_CHAIN (prev
) = TREE_CHAIN (t
);
5466 /* Handle a "dllimport" or "dllexport" attribute; arguments as in
5467 struct attribute_spec.handler. */
5470 handle_dll_attribute (tree
* pnode
, tree name
, tree args
, int flags
,
5476 /* These attributes may apply to structure and union types being created,
5477 but otherwise should pass to the declaration involved. */
5480 if (flags
& ((int) ATTR_FLAG_DECL_NEXT
| (int) ATTR_FLAG_FUNCTION_NEXT
5481 | (int) ATTR_FLAG_ARRAY_NEXT
))
5483 *no_add_attrs
= true;
5484 return tree_cons (name
, args
, NULL_TREE
);
5486 if (TREE_CODE (node
) == RECORD_TYPE
5487 || TREE_CODE (node
) == UNION_TYPE
)
5489 node
= TYPE_NAME (node
);
5495 warning (OPT_Wattributes
, "%qE attribute ignored",
5497 *no_add_attrs
= true;
5502 if (TREE_CODE (node
) != FUNCTION_DECL
5503 && TREE_CODE (node
) != VAR_DECL
5504 && TREE_CODE (node
) != TYPE_DECL
)
5506 *no_add_attrs
= true;
5507 warning (OPT_Wattributes
, "%qE attribute ignored",
5512 if (TREE_CODE (node
) == TYPE_DECL
5513 && TREE_CODE (TREE_TYPE (node
)) != RECORD_TYPE
5514 && TREE_CODE (TREE_TYPE (node
)) != UNION_TYPE
)
5516 *no_add_attrs
= true;
5517 warning (OPT_Wattributes
, "%qE attribute ignored",
5522 is_dllimport
= is_attribute_p ("dllimport", name
);
5524 /* Report error on dllimport ambiguities seen now before they cause
5528 /* Honor any target-specific overrides. */
5529 if (!targetm
.valid_dllimport_attribute_p (node
))
5530 *no_add_attrs
= true;
5532 else if (TREE_CODE (node
) == FUNCTION_DECL
5533 && DECL_DECLARED_INLINE_P (node
))
5535 warning (OPT_Wattributes
, "inline function %q+D declared as "
5536 " dllimport: attribute ignored", node
);
5537 *no_add_attrs
= true;
5539 /* Like MS, treat definition of dllimported variables and
5540 non-inlined functions on declaration as syntax errors. */
5541 else if (TREE_CODE (node
) == FUNCTION_DECL
&& DECL_INITIAL (node
))
5543 error ("function %q+D definition is marked dllimport", node
);
5544 *no_add_attrs
= true;
5547 else if (TREE_CODE (node
) == VAR_DECL
)
5549 if (DECL_INITIAL (node
))
5551 error ("variable %q+D definition is marked dllimport",
5553 *no_add_attrs
= true;
5556 /* `extern' needn't be specified with dllimport.
5557 Specify `extern' now and hope for the best. Sigh. */
5558 DECL_EXTERNAL (node
) = 1;
5559 /* Also, implicitly give dllimport'd variables declared within
5560 a function global scope, unless declared static. */
5561 if (current_function_decl
!= NULL_TREE
&& !TREE_STATIC (node
))
5562 TREE_PUBLIC (node
) = 1;
5565 if (*no_add_attrs
== false)
5566 DECL_DLLIMPORT_P (node
) = 1;
5568 else if (TREE_CODE (node
) == FUNCTION_DECL
5569 && DECL_DECLARED_INLINE_P (node
)
5570 && flag_keep_inline_dllexport
)
5571 /* An exported function, even if inline, must be emitted. */
5572 DECL_EXTERNAL (node
) = 0;
5574 /* Report error if symbol is not accessible at global scope. */
5575 if (!TREE_PUBLIC (node
)
5576 && (TREE_CODE (node
) == VAR_DECL
5577 || TREE_CODE (node
) == FUNCTION_DECL
))
5579 error ("external linkage required for symbol %q+D because of "
5580 "%qE attribute", node
, name
);
5581 *no_add_attrs
= true;
5584 /* A dllexport'd entity must have default visibility so that other
5585 program units (shared libraries or the main executable) can see
5586 it. A dllimport'd entity must have default visibility so that
5587 the linker knows that undefined references within this program
5588 unit can be resolved by the dynamic linker. */
5591 if (DECL_VISIBILITY_SPECIFIED (node
)
5592 && DECL_VISIBILITY (node
) != VISIBILITY_DEFAULT
)
5593 error ("%qE implies default visibility, but %qD has already "
5594 "been declared with a different visibility",
5596 DECL_VISIBILITY (node
) = VISIBILITY_DEFAULT
;
5597 DECL_VISIBILITY_SPECIFIED (node
) = 1;
5603 #endif /* TARGET_DLLIMPORT_DECL_ATTRIBUTES */
5605 /* Set the type qualifiers for TYPE to TYPE_QUALS, which is a bitmask
5606 of the various TYPE_QUAL values. */
5609 set_type_quals (tree type
, int type_quals
)
5611 TYPE_READONLY (type
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
5612 TYPE_VOLATILE (type
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
5613 TYPE_RESTRICT (type
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
5614 TYPE_ADDR_SPACE (type
) = DECODE_QUAL_ADDR_SPACE (type_quals
);
5617 /* Returns true iff CAND is equivalent to BASE with TYPE_QUALS. */
5620 check_qualified_type (const_tree cand
, const_tree base
, int type_quals
)
5622 return (TYPE_QUALS (cand
) == type_quals
5623 && TYPE_NAME (cand
) == TYPE_NAME (base
)
5624 /* Apparently this is needed for Objective-C. */
5625 && TYPE_CONTEXT (cand
) == TYPE_CONTEXT (base
)
5626 /* Check alignment. */
5627 && TYPE_ALIGN (cand
) == TYPE_ALIGN (base
)
5628 && attribute_list_equal (TYPE_ATTRIBUTES (cand
),
5629 TYPE_ATTRIBUTES (base
)));
5632 /* Returns true iff CAND is equivalent to BASE with ALIGN. */
5635 check_aligned_type (const_tree cand
, const_tree base
, unsigned int align
)
5637 return (TYPE_QUALS (cand
) == TYPE_QUALS (base
)
5638 && TYPE_NAME (cand
) == TYPE_NAME (base
)
5639 /* Apparently this is needed for Objective-C. */
5640 && TYPE_CONTEXT (cand
) == TYPE_CONTEXT (base
)
5641 /* Check alignment. */
5642 && TYPE_ALIGN (cand
) == align
5643 && attribute_list_equal (TYPE_ATTRIBUTES (cand
),
5644 TYPE_ATTRIBUTES (base
)));
5647 /* Return a version of the TYPE, qualified as indicated by the
5648 TYPE_QUALS, if one exists. If no qualified version exists yet,
5649 return NULL_TREE. */
5652 get_qualified_type (tree type
, int type_quals
)
5656 if (TYPE_QUALS (type
) == type_quals
)
5659 /* Search the chain of variants to see if there is already one there just
5660 like the one we need to have. If so, use that existing one. We must
5661 preserve the TYPE_NAME, since there is code that depends on this. */
5662 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
5663 if (check_qualified_type (t
, type
, type_quals
))
5669 /* Like get_qualified_type, but creates the type if it does not
5670 exist. This function never returns NULL_TREE. */
5673 build_qualified_type (tree type
, int type_quals
)
5677 /* See if we already have the appropriate qualified variant. */
5678 t
= get_qualified_type (type
, type_quals
);
5680 /* If not, build it. */
5683 t
= build_variant_type_copy (type
);
5684 set_type_quals (t
, type_quals
);
5686 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
5687 /* Propagate structural equality. */
5688 SET_TYPE_STRUCTURAL_EQUALITY (t
);
5689 else if (TYPE_CANONICAL (type
) != type
)
5690 /* Build the underlying canonical type, since it is different
5692 TYPE_CANONICAL (t
) = build_qualified_type (TYPE_CANONICAL (type
),
5695 /* T is its own canonical type. */
5696 TYPE_CANONICAL (t
) = t
;
5703 /* Create a variant of type T with alignment ALIGN. */
5706 build_aligned_type (tree type
, unsigned int align
)
5710 if (TYPE_PACKED (type
)
5711 || TYPE_ALIGN (type
) == align
)
5714 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
5715 if (check_aligned_type (t
, type
, align
))
5718 t
= build_variant_type_copy (type
);
5719 TYPE_ALIGN (t
) = align
;
5724 /* Create a new distinct copy of TYPE. The new type is made its own
5725 MAIN_VARIANT. If TYPE requires structural equality checks, the
5726 resulting type requires structural equality checks; otherwise, its
5727 TYPE_CANONICAL points to itself. */
5730 build_distinct_type_copy (tree type
)
5732 tree t
= copy_node (type
);
5734 TYPE_POINTER_TO (t
) = 0;
5735 TYPE_REFERENCE_TO (t
) = 0;
5737 /* Set the canonical type either to a new equivalence class, or
5738 propagate the need for structural equality checks. */
5739 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
5740 SET_TYPE_STRUCTURAL_EQUALITY (t
);
5742 TYPE_CANONICAL (t
) = t
;
5744 /* Make it its own variant. */
5745 TYPE_MAIN_VARIANT (t
) = t
;
5746 TYPE_NEXT_VARIANT (t
) = 0;
5748 /* Note that it is now possible for TYPE_MIN_VALUE to be a value
5749 whose TREE_TYPE is not t. This can also happen in the Ada
5750 frontend when using subtypes. */
5755 /* Create a new variant of TYPE, equivalent but distinct. This is so
5756 the caller can modify it. TYPE_CANONICAL for the return type will
5757 be equivalent to TYPE_CANONICAL of TYPE, indicating that the types
5758 are considered equal by the language itself (or that both types
5759 require structural equality checks). */
5762 build_variant_type_copy (tree type
)
5764 tree t
, m
= TYPE_MAIN_VARIANT (type
);
5766 t
= build_distinct_type_copy (type
);
5768 /* Since we're building a variant, assume that it is a non-semantic
5769 variant. This also propagates TYPE_STRUCTURAL_EQUALITY_P. */
5770 TYPE_CANONICAL (t
) = TYPE_CANONICAL (type
);
5772 /* Add the new type to the chain of variants of TYPE. */
5773 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (m
);
5774 TYPE_NEXT_VARIANT (m
) = t
;
5775 TYPE_MAIN_VARIANT (t
) = m
;
5780 /* Return true if the from tree in both tree maps are equal. */
5783 tree_map_base_eq (const void *va
, const void *vb
)
5785 const struct tree_map_base
*const a
= (const struct tree_map_base
*) va
,
5786 *const b
= (const struct tree_map_base
*) vb
;
5787 return (a
->from
== b
->from
);
5790 /* Hash a from tree in a tree_base_map. */
5793 tree_map_base_hash (const void *item
)
5795 return htab_hash_pointer (((const struct tree_map_base
*)item
)->from
);
5798 /* Return true if this tree map structure is marked for garbage collection
5799 purposes. We simply return true if the from tree is marked, so that this
5800 structure goes away when the from tree goes away. */
5803 tree_map_base_marked_p (const void *p
)
5805 return ggc_marked_p (((const struct tree_map_base
*) p
)->from
);
5808 /* Hash a from tree in a tree_map. */
5811 tree_map_hash (const void *item
)
5813 return (((const struct tree_map
*) item
)->hash
);
5816 /* Hash a from tree in a tree_decl_map. */
5819 tree_decl_map_hash (const void *item
)
5821 return DECL_UID (((const struct tree_decl_map
*) item
)->base
.from
);
5824 /* Return the initialization priority for DECL. */
5827 decl_init_priority_lookup (tree decl
)
5829 struct tree_priority_map
*h
;
5830 struct tree_map_base in
;
5832 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
5834 h
= (struct tree_priority_map
*) htab_find (init_priority_for_decl
, &in
);
5835 return h
? h
->init
: DEFAULT_INIT_PRIORITY
;
5838 /* Return the finalization priority for DECL. */
5841 decl_fini_priority_lookup (tree decl
)
5843 struct tree_priority_map
*h
;
5844 struct tree_map_base in
;
5846 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
);
5848 h
= (struct tree_priority_map
*) htab_find (init_priority_for_decl
, &in
);
5849 return h
? h
->fini
: DEFAULT_INIT_PRIORITY
;
5852 /* Return the initialization and finalization priority information for
5853 DECL. If there is no previous priority information, a freshly
5854 allocated structure is returned. */
5856 static struct tree_priority_map
*
5857 decl_priority_info (tree decl
)
5859 struct tree_priority_map in
;
5860 struct tree_priority_map
*h
;
5863 in
.base
.from
= decl
;
5864 loc
= htab_find_slot (init_priority_for_decl
, &in
, INSERT
);
5865 h
= (struct tree_priority_map
*) *loc
;
5868 h
= ggc_alloc_cleared_tree_priority_map ();
5870 h
->base
.from
= decl
;
5871 h
->init
= DEFAULT_INIT_PRIORITY
;
5872 h
->fini
= DEFAULT_INIT_PRIORITY
;
5878 /* Set the initialization priority for DECL to PRIORITY. */
5881 decl_init_priority_insert (tree decl
, priority_type priority
)
5883 struct tree_priority_map
*h
;
5885 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
5886 if (priority
== DEFAULT_INIT_PRIORITY
)
5888 h
= decl_priority_info (decl
);
5892 /* Set the finalization priority for DECL to PRIORITY. */
5895 decl_fini_priority_insert (tree decl
, priority_type priority
)
5897 struct tree_priority_map
*h
;
5899 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
);
5900 if (priority
== DEFAULT_INIT_PRIORITY
)
5902 h
= decl_priority_info (decl
);
5906 /* Print out the statistics for the DECL_DEBUG_EXPR hash table. */
5909 print_debug_expr_statistics (void)
5911 fprintf (stderr
, "DECL_DEBUG_EXPR hash: size %ld, %ld elements, %f collisions\n",
5912 (long) htab_size (debug_expr_for_decl
),
5913 (long) htab_elements (debug_expr_for_decl
),
5914 htab_collisions (debug_expr_for_decl
));
5917 /* Print out the statistics for the DECL_VALUE_EXPR hash table. */
5920 print_value_expr_statistics (void)
5922 fprintf (stderr
, "DECL_VALUE_EXPR hash: size %ld, %ld elements, %f collisions\n",
5923 (long) htab_size (value_expr_for_decl
),
5924 (long) htab_elements (value_expr_for_decl
),
5925 htab_collisions (value_expr_for_decl
));
5928 /* Lookup a debug expression for FROM, and return it if we find one. */
5931 decl_debug_expr_lookup (tree from
)
5933 struct tree_decl_map
*h
, in
;
5934 in
.base
.from
= from
;
5936 h
= (struct tree_decl_map
*)
5937 htab_find_with_hash (debug_expr_for_decl
, &in
, DECL_UID (from
));
5943 /* Insert a mapping FROM->TO in the debug expression hashtable. */
5946 decl_debug_expr_insert (tree from
, tree to
)
5948 struct tree_decl_map
*h
;
5951 h
= ggc_alloc_tree_decl_map ();
5952 h
->base
.from
= from
;
5954 loc
= htab_find_slot_with_hash (debug_expr_for_decl
, h
, DECL_UID (from
),
5956 *(struct tree_decl_map
**) loc
= h
;
5959 /* Lookup a value expression for FROM, and return it if we find one. */
5962 decl_value_expr_lookup (tree from
)
5964 struct tree_decl_map
*h
, in
;
5965 in
.base
.from
= from
;
5967 h
= (struct tree_decl_map
*)
5968 htab_find_with_hash (value_expr_for_decl
, &in
, DECL_UID (from
));
5974 /* Insert a mapping FROM->TO in the value expression hashtable. */
5977 decl_value_expr_insert (tree from
, tree to
)
5979 struct tree_decl_map
*h
;
5982 h
= ggc_alloc_tree_decl_map ();
5983 h
->base
.from
= from
;
5985 loc
= htab_find_slot_with_hash (value_expr_for_decl
, h
, DECL_UID (from
),
5987 *(struct tree_decl_map
**) loc
= h
;
5990 /* Hashing of types so that we don't make duplicates.
5991 The entry point is `type_hash_canon'. */
5993 /* Compute a hash code for a list of types (chain of TREE_LIST nodes
5994 with types in the TREE_VALUE slots), by adding the hash codes
5995 of the individual types. */
5998 type_hash_list (const_tree list
, hashval_t hashcode
)
6002 for (tail
= list
; tail
; tail
= TREE_CHAIN (tail
))
6003 if (TREE_VALUE (tail
) != error_mark_node
)
6004 hashcode
= iterative_hash_object (TYPE_HASH (TREE_VALUE (tail
)),
6010 /* These are the Hashtable callback functions. */
6012 /* Returns true iff the types are equivalent. */
6015 type_hash_eq (const void *va
, const void *vb
)
6017 const struct type_hash
*const a
= (const struct type_hash
*) va
,
6018 *const b
= (const struct type_hash
*) vb
;
6020 /* First test the things that are the same for all types. */
6021 if (a
->hash
!= b
->hash
6022 || TREE_CODE (a
->type
) != TREE_CODE (b
->type
)
6023 || TREE_TYPE (a
->type
) != TREE_TYPE (b
->type
)
6024 || !attribute_list_equal (TYPE_ATTRIBUTES (a
->type
),
6025 TYPE_ATTRIBUTES (b
->type
))
6026 || (TREE_CODE (a
->type
) != COMPLEX_TYPE
6027 && TYPE_NAME (a
->type
) != TYPE_NAME (b
->type
)))
6030 /* Be careful about comparing arrays before and after the element type
6031 has been completed; don't compare TYPE_ALIGN unless both types are
6033 if (COMPLETE_TYPE_P (a
->type
) && COMPLETE_TYPE_P (b
->type
)
6034 && (TYPE_ALIGN (a
->type
) != TYPE_ALIGN (b
->type
)
6035 || TYPE_MODE (a
->type
) != TYPE_MODE (b
->type
)))
6038 switch (TREE_CODE (a
->type
))
6043 case REFERENCE_TYPE
:
6047 return TYPE_VECTOR_SUBPARTS (a
->type
) == TYPE_VECTOR_SUBPARTS (b
->type
);
6050 if (TYPE_VALUES (a
->type
) != TYPE_VALUES (b
->type
)
6051 && !(TYPE_VALUES (a
->type
)
6052 && TREE_CODE (TYPE_VALUES (a
->type
)) == TREE_LIST
6053 && TYPE_VALUES (b
->type
)
6054 && TREE_CODE (TYPE_VALUES (b
->type
)) == TREE_LIST
6055 && type_list_equal (TYPE_VALUES (a
->type
),
6056 TYPE_VALUES (b
->type
))))
6059 /* ... fall through ... */
6064 return ((TYPE_MAX_VALUE (a
->type
) == TYPE_MAX_VALUE (b
->type
)
6065 || tree_int_cst_equal (TYPE_MAX_VALUE (a
->type
),
6066 TYPE_MAX_VALUE (b
->type
)))
6067 && (TYPE_MIN_VALUE (a
->type
) == TYPE_MIN_VALUE (b
->type
)
6068 || tree_int_cst_equal (TYPE_MIN_VALUE (a
->type
),
6069 TYPE_MIN_VALUE (b
->type
))));
6071 case FIXED_POINT_TYPE
:
6072 return TYPE_SATURATING (a
->type
) == TYPE_SATURATING (b
->type
);
6075 return TYPE_OFFSET_BASETYPE (a
->type
) == TYPE_OFFSET_BASETYPE (b
->type
);
6078 if (TYPE_METHOD_BASETYPE (a
->type
) == TYPE_METHOD_BASETYPE (b
->type
)
6079 && (TYPE_ARG_TYPES (a
->type
) == TYPE_ARG_TYPES (b
->type
)
6080 || (TYPE_ARG_TYPES (a
->type
)
6081 && TREE_CODE (TYPE_ARG_TYPES (a
->type
)) == TREE_LIST
6082 && TYPE_ARG_TYPES (b
->type
)
6083 && TREE_CODE (TYPE_ARG_TYPES (b
->type
)) == TREE_LIST
6084 && type_list_equal (TYPE_ARG_TYPES (a
->type
),
6085 TYPE_ARG_TYPES (b
->type
)))))
6089 return TYPE_DOMAIN (a
->type
) == TYPE_DOMAIN (b
->type
);
6093 case QUAL_UNION_TYPE
:
6094 return (TYPE_FIELDS (a
->type
) == TYPE_FIELDS (b
->type
)
6095 || (TYPE_FIELDS (a
->type
)
6096 && TREE_CODE (TYPE_FIELDS (a
->type
)) == TREE_LIST
6097 && TYPE_FIELDS (b
->type
)
6098 && TREE_CODE (TYPE_FIELDS (b
->type
)) == TREE_LIST
6099 && type_list_equal (TYPE_FIELDS (a
->type
),
6100 TYPE_FIELDS (b
->type
))));
6103 if (TYPE_ARG_TYPES (a
->type
) == TYPE_ARG_TYPES (b
->type
)
6104 || (TYPE_ARG_TYPES (a
->type
)
6105 && TREE_CODE (TYPE_ARG_TYPES (a
->type
)) == TREE_LIST
6106 && TYPE_ARG_TYPES (b
->type
)
6107 && TREE_CODE (TYPE_ARG_TYPES (b
->type
)) == TREE_LIST
6108 && type_list_equal (TYPE_ARG_TYPES (a
->type
),
6109 TYPE_ARG_TYPES (b
->type
))))
6117 if (lang_hooks
.types
.type_hash_eq
!= NULL
)
6118 return lang_hooks
.types
.type_hash_eq (a
->type
, b
->type
);
6123 /* Return the cached hash value. */
6126 type_hash_hash (const void *item
)
6128 return ((const struct type_hash
*) item
)->hash
;
6131 /* Look in the type hash table for a type isomorphic to TYPE.
6132 If one is found, return it. Otherwise return 0. */
6135 type_hash_lookup (hashval_t hashcode
, tree type
)
6137 struct type_hash
*h
, in
;
6139 /* The TYPE_ALIGN field of a type is set by layout_type(), so we
6140 must call that routine before comparing TYPE_ALIGNs. */
6146 h
= (struct type_hash
*) htab_find_with_hash (type_hash_table
, &in
,
6153 /* Add an entry to the type-hash-table
6154 for a type TYPE whose hash code is HASHCODE. */
6157 type_hash_add (hashval_t hashcode
, tree type
)
6159 struct type_hash
*h
;
6162 h
= ggc_alloc_type_hash ();
6165 loc
= htab_find_slot_with_hash (type_hash_table
, h
, hashcode
, INSERT
);
6169 /* Given TYPE, and HASHCODE its hash code, return the canonical
6170 object for an identical type if one already exists.
6171 Otherwise, return TYPE, and record it as the canonical object.
6173 To use this function, first create a type of the sort you want.
6174 Then compute its hash code from the fields of the type that
6175 make it different from other similar types.
6176 Then call this function and use the value. */
6179 type_hash_canon (unsigned int hashcode
, tree type
)
6183 /* The hash table only contains main variants, so ensure that's what we're
6185 gcc_assert (TYPE_MAIN_VARIANT (type
) == type
);
6187 /* See if the type is in the hash table already. If so, return it.
6188 Otherwise, add the type. */
6189 t1
= type_hash_lookup (hashcode
, type
);
6192 #ifdef GATHER_STATISTICS
6193 tree_code_counts
[(int) TREE_CODE (type
)]--;
6194 tree_node_counts
[(int) t_kind
]--;
6195 tree_node_sizes
[(int) t_kind
] -= sizeof (struct tree_type
);
6201 type_hash_add (hashcode
, type
);
6206 /* See if the data pointed to by the type hash table is marked. We consider
6207 it marked if the type is marked or if a debug type number or symbol
6208 table entry has been made for the type. */
6211 type_hash_marked_p (const void *p
)
6213 const_tree
const type
= ((const struct type_hash
*) p
)->type
;
6215 return ggc_marked_p (type
);
6219 print_type_hash_statistics (void)
6221 fprintf (stderr
, "Type hash: size %ld, %ld elements, %f collisions\n",
6222 (long) htab_size (type_hash_table
),
6223 (long) htab_elements (type_hash_table
),
6224 htab_collisions (type_hash_table
));
6227 /* Compute a hash code for a list of attributes (chain of TREE_LIST nodes
6228 with names in the TREE_PURPOSE slots and args in the TREE_VALUE slots),
6229 by adding the hash codes of the individual attributes. */
6232 attribute_hash_list (const_tree list
, hashval_t hashcode
)
6236 for (tail
= list
; tail
; tail
= TREE_CHAIN (tail
))
6237 /* ??? Do we want to add in TREE_VALUE too? */
6238 hashcode
= iterative_hash_object
6239 (IDENTIFIER_HASH_VALUE (TREE_PURPOSE (tail
)), hashcode
);
6243 /* Given two lists of attributes, return true if list l2 is
6244 equivalent to l1. */
6247 attribute_list_equal (const_tree l1
, const_tree l2
)
6249 return attribute_list_contained (l1
, l2
)
6250 && attribute_list_contained (l2
, l1
);
6253 /* Given two lists of attributes, return true if list L2 is
6254 completely contained within L1. */
6255 /* ??? This would be faster if attribute names were stored in a canonicalized
6256 form. Otherwise, if L1 uses `foo' and L2 uses `__foo__', the long method
6257 must be used to show these elements are equivalent (which they are). */
6258 /* ??? It's not clear that attributes with arguments will always be handled
6262 attribute_list_contained (const_tree l1
, const_tree l2
)
6266 /* First check the obvious, maybe the lists are identical. */
6270 /* Maybe the lists are similar. */
6271 for (t1
= l1
, t2
= l2
;
6273 && TREE_PURPOSE (t1
) == TREE_PURPOSE (t2
)
6274 && TREE_VALUE (t1
) == TREE_VALUE (t2
);
6275 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
));
6277 /* Maybe the lists are equal. */
6278 if (t1
== 0 && t2
== 0)
6281 for (; t2
!= 0; t2
= TREE_CHAIN (t2
))
6284 /* This CONST_CAST is okay because lookup_attribute does not
6285 modify its argument and the return value is assigned to a
6287 for (attr
= lookup_attribute (IDENTIFIER_POINTER (TREE_PURPOSE (t2
)),
6288 CONST_CAST_TREE(l1
));
6289 attr
!= NULL_TREE
&& !attribute_value_equal (t2
, attr
);
6290 attr
= lookup_attribute (IDENTIFIER_POINTER (TREE_PURPOSE (t2
)),
6294 if (attr
== NULL_TREE
)
6301 /* Given two lists of types
6302 (chains of TREE_LIST nodes with types in the TREE_VALUE slots)
6303 return 1 if the lists contain the same types in the same order.
6304 Also, the TREE_PURPOSEs must match. */
6307 type_list_equal (const_tree l1
, const_tree l2
)
6311 for (t1
= l1
, t2
= l2
; t1
&& t2
; t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
6312 if (TREE_VALUE (t1
) != TREE_VALUE (t2
)
6313 || (TREE_PURPOSE (t1
) != TREE_PURPOSE (t2
)
6314 && ! (1 == simple_cst_equal (TREE_PURPOSE (t1
), TREE_PURPOSE (t2
))
6315 && (TREE_TYPE (TREE_PURPOSE (t1
))
6316 == TREE_TYPE (TREE_PURPOSE (t2
))))))
6322 /* Returns the number of arguments to the FUNCTION_TYPE or METHOD_TYPE
6323 given by TYPE. If the argument list accepts variable arguments,
6324 then this function counts only the ordinary arguments. */
6327 type_num_arguments (const_tree type
)
6332 for (t
= TYPE_ARG_TYPES (type
); t
; t
= TREE_CHAIN (t
))
6333 /* If the function does not take a variable number of arguments,
6334 the last element in the list will have type `void'. */
6335 if (VOID_TYPE_P (TREE_VALUE (t
)))
6343 /* Nonzero if integer constants T1 and T2
6344 represent the same constant value. */
6347 tree_int_cst_equal (const_tree t1
, const_tree t2
)
6352 if (t1
== 0 || t2
== 0)
6355 if (TREE_CODE (t1
) == INTEGER_CST
6356 && TREE_CODE (t2
) == INTEGER_CST
6357 && TREE_INT_CST_LOW (t1
) == TREE_INT_CST_LOW (t2
)
6358 && TREE_INT_CST_HIGH (t1
) == TREE_INT_CST_HIGH (t2
))
6364 /* Nonzero if integer constants T1 and T2 represent values that satisfy <.
6365 The precise way of comparison depends on their data type. */
6368 tree_int_cst_lt (const_tree t1
, const_tree t2
)
6373 if (TYPE_UNSIGNED (TREE_TYPE (t1
)) != TYPE_UNSIGNED (TREE_TYPE (t2
)))
6375 int t1_sgn
= tree_int_cst_sgn (t1
);
6376 int t2_sgn
= tree_int_cst_sgn (t2
);
6378 if (t1_sgn
< t2_sgn
)
6380 else if (t1_sgn
> t2_sgn
)
6382 /* Otherwise, both are non-negative, so we compare them as
6383 unsigned just in case one of them would overflow a signed
6386 else if (!TYPE_UNSIGNED (TREE_TYPE (t1
)))
6387 return INT_CST_LT (t1
, t2
);
6389 return INT_CST_LT_UNSIGNED (t1
, t2
);
6392 /* Returns -1 if T1 < T2, 0 if T1 == T2, and 1 if T1 > T2. */
6395 tree_int_cst_compare (const_tree t1
, const_tree t2
)
6397 if (tree_int_cst_lt (t1
, t2
))
6399 else if (tree_int_cst_lt (t2
, t1
))
6405 /* Return 1 if T is an INTEGER_CST that can be manipulated efficiently on
6406 the host. If POS is zero, the value can be represented in a single
6407 HOST_WIDE_INT. If POS is nonzero, the value must be non-negative and can
6408 be represented in a single unsigned HOST_WIDE_INT. */
6411 host_integerp (const_tree t
, int pos
)
6416 return (TREE_CODE (t
) == INTEGER_CST
6417 && ((TREE_INT_CST_HIGH (t
) == 0
6418 && (HOST_WIDE_INT
) TREE_INT_CST_LOW (t
) >= 0)
6419 || (! pos
&& TREE_INT_CST_HIGH (t
) == -1
6420 && (HOST_WIDE_INT
) TREE_INT_CST_LOW (t
) < 0
6421 && (!TYPE_UNSIGNED (TREE_TYPE (t
))
6422 || (TREE_CODE (TREE_TYPE (t
)) == INTEGER_TYPE
6423 && TYPE_IS_SIZETYPE (TREE_TYPE (t
)))))
6424 || (pos
&& TREE_INT_CST_HIGH (t
) == 0)));
6427 /* Return the HOST_WIDE_INT least significant bits of T if it is an
6428 INTEGER_CST and there is no overflow. POS is nonzero if the result must
6429 be non-negative. We must be able to satisfy the above conditions. */
6432 tree_low_cst (const_tree t
, int pos
)
6434 gcc_assert (host_integerp (t
, pos
));
6435 return TREE_INT_CST_LOW (t
);
6438 /* Return the most significant bit of the integer constant T. */
6441 tree_int_cst_msb (const_tree t
)
6445 unsigned HOST_WIDE_INT l
;
6447 /* Note that using TYPE_PRECISION here is wrong. We care about the
6448 actual bits, not the (arbitrary) range of the type. */
6449 prec
= GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (t
))) - 1;
6450 rshift_double (TREE_INT_CST_LOW (t
), TREE_INT_CST_HIGH (t
), prec
,
6451 2 * HOST_BITS_PER_WIDE_INT
, &l
, &h
, 0);
6452 return (l
& 1) == 1;
6455 /* Return an indication of the sign of the integer constant T.
6456 The return value is -1 if T < 0, 0 if T == 0, and 1 if T > 0.
6457 Note that -1 will never be returned if T's type is unsigned. */
6460 tree_int_cst_sgn (const_tree t
)
6462 if (TREE_INT_CST_LOW (t
) == 0 && TREE_INT_CST_HIGH (t
) == 0)
6464 else if (TYPE_UNSIGNED (TREE_TYPE (t
)))
6466 else if (TREE_INT_CST_HIGH (t
) < 0)
6472 /* Return the minimum number of bits needed to represent VALUE in a
6473 signed or unsigned type, UNSIGNEDP says which. */
6476 tree_int_cst_min_precision (tree value
, bool unsignedp
)
6480 /* If the value is negative, compute its negative minus 1. The latter
6481 adjustment is because the absolute value of the largest negative value
6482 is one larger than the largest positive value. This is equivalent to
6483 a bit-wise negation, so use that operation instead. */
6485 if (tree_int_cst_sgn (value
) < 0)
6486 value
= fold_build1 (BIT_NOT_EXPR
, TREE_TYPE (value
), value
);
6488 /* Return the number of bits needed, taking into account the fact
6489 that we need one more bit for a signed than unsigned type. */
6491 if (integer_zerop (value
))
6494 log
= tree_floor_log2 (value
);
6496 return log
+ 1 + !unsignedp
;
6499 /* Compare two constructor-element-type constants. Return 1 if the lists
6500 are known to be equal; otherwise return 0. */
6503 simple_cst_list_equal (const_tree l1
, const_tree l2
)
6505 while (l1
!= NULL_TREE
&& l2
!= NULL_TREE
)
6507 if (simple_cst_equal (TREE_VALUE (l1
), TREE_VALUE (l2
)) != 1)
6510 l1
= TREE_CHAIN (l1
);
6511 l2
= TREE_CHAIN (l2
);
6517 /* Return truthvalue of whether T1 is the same tree structure as T2.
6518 Return 1 if they are the same.
6519 Return 0 if they are understandably different.
6520 Return -1 if either contains tree structure not understood by
6524 simple_cst_equal (const_tree t1
, const_tree t2
)
6526 enum tree_code code1
, code2
;
6532 if (t1
== 0 || t2
== 0)
6535 code1
= TREE_CODE (t1
);
6536 code2
= TREE_CODE (t2
);
6538 if (CONVERT_EXPR_CODE_P (code1
) || code1
== NON_LVALUE_EXPR
)
6540 if (CONVERT_EXPR_CODE_P (code2
)
6541 || code2
== NON_LVALUE_EXPR
)
6542 return simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
6544 return simple_cst_equal (TREE_OPERAND (t1
, 0), t2
);
6547 else if (CONVERT_EXPR_CODE_P (code2
)
6548 || code2
== NON_LVALUE_EXPR
)
6549 return simple_cst_equal (t1
, TREE_OPERAND (t2
, 0));
6557 return (TREE_INT_CST_LOW (t1
) == TREE_INT_CST_LOW (t2
)
6558 && TREE_INT_CST_HIGH (t1
) == TREE_INT_CST_HIGH (t2
));
6561 return REAL_VALUES_IDENTICAL (TREE_REAL_CST (t1
), TREE_REAL_CST (t2
));
6564 return FIXED_VALUES_IDENTICAL (TREE_FIXED_CST (t1
), TREE_FIXED_CST (t2
));
6567 return (TREE_STRING_LENGTH (t1
) == TREE_STRING_LENGTH (t2
)
6568 && ! memcmp (TREE_STRING_POINTER (t1
), TREE_STRING_POINTER (t2
),
6569 TREE_STRING_LENGTH (t1
)));
6573 unsigned HOST_WIDE_INT idx
;
6574 VEC(constructor_elt
, gc
) *v1
= CONSTRUCTOR_ELTS (t1
);
6575 VEC(constructor_elt
, gc
) *v2
= CONSTRUCTOR_ELTS (t2
);
6577 if (VEC_length (constructor_elt
, v1
) != VEC_length (constructor_elt
, v2
))
6580 for (idx
= 0; idx
< VEC_length (constructor_elt
, v1
); ++idx
)
6581 /* ??? Should we handle also fields here? */
6582 if (!simple_cst_equal (VEC_index (constructor_elt
, v1
, idx
)->value
,
6583 VEC_index (constructor_elt
, v2
, idx
)->value
))
6589 return simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
6592 cmp
= simple_cst_equal (CALL_EXPR_FN (t1
), CALL_EXPR_FN (t2
));
6595 if (call_expr_nargs (t1
) != call_expr_nargs (t2
))
6598 const_tree arg1
, arg2
;
6599 const_call_expr_arg_iterator iter1
, iter2
;
6600 for (arg1
= first_const_call_expr_arg (t1
, &iter1
),
6601 arg2
= first_const_call_expr_arg (t2
, &iter2
);
6603 arg1
= next_const_call_expr_arg (&iter1
),
6604 arg2
= next_const_call_expr_arg (&iter2
))
6606 cmp
= simple_cst_equal (arg1
, arg2
);
6610 return arg1
== arg2
;
6614 /* Special case: if either target is an unallocated VAR_DECL,
6615 it means that it's going to be unified with whatever the
6616 TARGET_EXPR is really supposed to initialize, so treat it
6617 as being equivalent to anything. */
6618 if ((TREE_CODE (TREE_OPERAND (t1
, 0)) == VAR_DECL
6619 && DECL_NAME (TREE_OPERAND (t1
, 0)) == NULL_TREE
6620 && !DECL_RTL_SET_P (TREE_OPERAND (t1
, 0)))
6621 || (TREE_CODE (TREE_OPERAND (t2
, 0)) == VAR_DECL
6622 && DECL_NAME (TREE_OPERAND (t2
, 0)) == NULL_TREE
6623 && !DECL_RTL_SET_P (TREE_OPERAND (t2
, 0))))
6626 cmp
= simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
6631 return simple_cst_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t2
, 1));
6633 case WITH_CLEANUP_EXPR
:
6634 cmp
= simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
6638 return simple_cst_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t1
, 1));
6641 if (TREE_OPERAND (t1
, 1) == TREE_OPERAND (t2
, 1))
6642 return simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
6656 /* This general rule works for most tree codes. All exceptions should be
6657 handled above. If this is a language-specific tree code, we can't
6658 trust what might be in the operand, so say we don't know
6660 if ((int) code1
>= (int) LAST_AND_UNUSED_TREE_CODE
)
6663 switch (TREE_CODE_CLASS (code1
))
6667 case tcc_comparison
:
6668 case tcc_expression
:
6672 for (i
= 0; i
< TREE_CODE_LENGTH (code1
); i
++)
6674 cmp
= simple_cst_equal (TREE_OPERAND (t1
, i
), TREE_OPERAND (t2
, i
));
6686 /* Compare the value of T, an INTEGER_CST, with U, an unsigned integer value.
6687 Return -1, 0, or 1 if the value of T is less than, equal to, or greater
6688 than U, respectively. */
6691 compare_tree_int (const_tree t
, unsigned HOST_WIDE_INT u
)
6693 if (tree_int_cst_sgn (t
) < 0)
6695 else if (TREE_INT_CST_HIGH (t
) != 0)
6697 else if (TREE_INT_CST_LOW (t
) == u
)
6699 else if (TREE_INT_CST_LOW (t
) < u
)
6705 /* Return true if CODE represents an associative tree code. Otherwise
6708 associative_tree_code (enum tree_code code
)
6727 /* Return true if CODE represents a commutative tree code. Otherwise
6730 commutative_tree_code (enum tree_code code
)
6743 case UNORDERED_EXPR
:
6747 case TRUTH_AND_EXPR
:
6748 case TRUTH_XOR_EXPR
:
6758 /* Return true if CODE represents a ternary tree code for which the
6759 first two operands are commutative. Otherwise return false. */
6761 commutative_ternary_tree_code (enum tree_code code
)
6765 case WIDEN_MULT_PLUS_EXPR
:
6766 case WIDEN_MULT_MINUS_EXPR
:
6775 /* Generate a hash value for an expression. This can be used iteratively
6776 by passing a previous result as the VAL argument.
6778 This function is intended to produce the same hash for expressions which
6779 would compare equal using operand_equal_p. */
6782 iterative_hash_expr (const_tree t
, hashval_t val
)
6785 enum tree_code code
;
6789 return iterative_hash_hashval_t (0, val
);
6791 code
= TREE_CODE (t
);
6795 /* Alas, constants aren't shared, so we can't rely on pointer
6798 val
= iterative_hash_host_wide_int (TREE_INT_CST_LOW (t
), val
);
6799 return iterative_hash_host_wide_int (TREE_INT_CST_HIGH (t
), val
);
6802 unsigned int val2
= real_hash (TREE_REAL_CST_PTR (t
));
6804 return iterative_hash_hashval_t (val2
, val
);
6808 unsigned int val2
= fixed_hash (TREE_FIXED_CST_PTR (t
));
6810 return iterative_hash_hashval_t (val2
, val
);
6813 return iterative_hash (TREE_STRING_POINTER (t
),
6814 TREE_STRING_LENGTH (t
), val
);
6816 val
= iterative_hash_expr (TREE_REALPART (t
), val
);
6817 return iterative_hash_expr (TREE_IMAGPART (t
), val
);
6819 return iterative_hash_expr (TREE_VECTOR_CST_ELTS (t
), val
);
6821 /* We can just compare by pointer. */
6822 return iterative_hash_host_wide_int (SSA_NAME_VERSION (t
), val
);
6823 case PLACEHOLDER_EXPR
:
6824 /* The node itself doesn't matter. */
6827 /* A list of expressions, for a CALL_EXPR or as the elements of a
6829 for (; t
; t
= TREE_CHAIN (t
))
6830 val
= iterative_hash_expr (TREE_VALUE (t
), val
);
6834 unsigned HOST_WIDE_INT idx
;
6836 FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (t
), idx
, field
, value
)
6838 val
= iterative_hash_expr (field
, val
);
6839 val
= iterative_hash_expr (value
, val
);
6845 /* The type of the second operand is relevant, except for
6846 its top-level qualifiers. */
6847 tree type
= TYPE_MAIN_VARIANT (TREE_TYPE (TREE_OPERAND (t
, 1)));
6849 val
= iterative_hash_object (TYPE_HASH (type
), val
);
6851 /* We could use the standard hash computation from this point
6853 val
= iterative_hash_object (code
, val
);
6854 val
= iterative_hash_expr (TREE_OPERAND (t
, 1), val
);
6855 val
= iterative_hash_expr (TREE_OPERAND (t
, 0), val
);
6859 /* When referring to a built-in FUNCTION_DECL, use the __builtin__ form.
6860 Otherwise nodes that compare equal according to operand_equal_p might
6861 get different hash codes. However, don't do this for machine specific
6862 or front end builtins, since the function code is overloaded in those
6864 if (DECL_BUILT_IN_CLASS (t
) == BUILT_IN_NORMAL
6865 && built_in_decls
[DECL_FUNCTION_CODE (t
)])
6867 t
= built_in_decls
[DECL_FUNCTION_CODE (t
)];
6868 code
= TREE_CODE (t
);
6872 tclass
= TREE_CODE_CLASS (code
);
6874 if (tclass
== tcc_declaration
)
6876 /* DECL's have a unique ID */
6877 val
= iterative_hash_host_wide_int (DECL_UID (t
), val
);
6881 gcc_assert (IS_EXPR_CODE_CLASS (tclass
));
6883 val
= iterative_hash_object (code
, val
);
6885 /* Don't hash the type, that can lead to having nodes which
6886 compare equal according to operand_equal_p, but which
6887 have different hash codes. */
6888 if (CONVERT_EXPR_CODE_P (code
)
6889 || code
== NON_LVALUE_EXPR
)
6891 /* Make sure to include signness in the hash computation. */
6892 val
+= TYPE_UNSIGNED (TREE_TYPE (t
));
6893 val
= iterative_hash_expr (TREE_OPERAND (t
, 0), val
);
6896 else if (commutative_tree_code (code
))
6898 /* It's a commutative expression. We want to hash it the same
6899 however it appears. We do this by first hashing both operands
6900 and then rehashing based on the order of their independent
6902 hashval_t one
= iterative_hash_expr (TREE_OPERAND (t
, 0), 0);
6903 hashval_t two
= iterative_hash_expr (TREE_OPERAND (t
, 1), 0);
6907 t
= one
, one
= two
, two
= t
;
6909 val
= iterative_hash_hashval_t (one
, val
);
6910 val
= iterative_hash_hashval_t (two
, val
);
6913 for (i
= TREE_OPERAND_LENGTH (t
) - 1; i
>= 0; --i
)
6914 val
= iterative_hash_expr (TREE_OPERAND (t
, i
), val
);
6921 /* Generate a hash value for a pair of expressions. This can be used
6922 iteratively by passing a previous result as the VAL argument.
6924 The same hash value is always returned for a given pair of expressions,
6925 regardless of the order in which they are presented. This is useful in
6926 hashing the operands of commutative functions. */
6929 iterative_hash_exprs_commutative (const_tree t1
,
6930 const_tree t2
, hashval_t val
)
6932 hashval_t one
= iterative_hash_expr (t1
, 0);
6933 hashval_t two
= iterative_hash_expr (t2
, 0);
6937 t
= one
, one
= two
, two
= t
;
6938 val
= iterative_hash_hashval_t (one
, val
);
6939 val
= iterative_hash_hashval_t (two
, val
);
6944 /* Constructors for pointer, array and function types.
6945 (RECORD_TYPE, UNION_TYPE and ENUMERAL_TYPE nodes are
6946 constructed by language-dependent code, not here.) */
6948 /* Construct, lay out and return the type of pointers to TO_TYPE with
6949 mode MODE. If CAN_ALIAS_ALL is TRUE, indicate this type can
6950 reference all of memory. If such a type has already been
6951 constructed, reuse it. */
6954 build_pointer_type_for_mode (tree to_type
, enum machine_mode mode
,
6959 if (to_type
== error_mark_node
)
6960 return error_mark_node
;
6962 /* If the pointed-to type has the may_alias attribute set, force
6963 a TYPE_REF_CAN_ALIAS_ALL pointer to be generated. */
6964 if (lookup_attribute ("may_alias", TYPE_ATTRIBUTES (to_type
)))
6965 can_alias_all
= true;
6967 /* In some cases, languages will have things that aren't a POINTER_TYPE
6968 (such as a RECORD_TYPE for fat pointers in Ada) as TYPE_POINTER_TO.
6969 In that case, return that type without regard to the rest of our
6972 ??? This is a kludge, but consistent with the way this function has
6973 always operated and there doesn't seem to be a good way to avoid this
6975 if (TYPE_POINTER_TO (to_type
) != 0
6976 && TREE_CODE (TYPE_POINTER_TO (to_type
)) != POINTER_TYPE
)
6977 return TYPE_POINTER_TO (to_type
);
6979 /* First, if we already have a type for pointers to TO_TYPE and it's
6980 the proper mode, use it. */
6981 for (t
= TYPE_POINTER_TO (to_type
); t
; t
= TYPE_NEXT_PTR_TO (t
))
6982 if (TYPE_MODE (t
) == mode
&& TYPE_REF_CAN_ALIAS_ALL (t
) == can_alias_all
)
6985 t
= make_node (POINTER_TYPE
);
6987 TREE_TYPE (t
) = to_type
;
6988 SET_TYPE_MODE (t
, mode
);
6989 TYPE_REF_CAN_ALIAS_ALL (t
) = can_alias_all
;
6990 TYPE_NEXT_PTR_TO (t
) = TYPE_POINTER_TO (to_type
);
6991 TYPE_POINTER_TO (to_type
) = t
;
6993 if (TYPE_STRUCTURAL_EQUALITY_P (to_type
))
6994 SET_TYPE_STRUCTURAL_EQUALITY (t
);
6995 else if (TYPE_CANONICAL (to_type
) != to_type
)
6997 = build_pointer_type_for_mode (TYPE_CANONICAL (to_type
),
6998 mode
, can_alias_all
);
7000 /* Lay out the type. This function has many callers that are concerned
7001 with expression-construction, and this simplifies them all. */
7007 /* By default build pointers in ptr_mode. */
7010 build_pointer_type (tree to_type
)
7012 addr_space_t as
= to_type
== error_mark_node
? ADDR_SPACE_GENERIC
7013 : TYPE_ADDR_SPACE (to_type
);
7014 enum machine_mode pointer_mode
= targetm
.addr_space
.pointer_mode (as
);
7015 return build_pointer_type_for_mode (to_type
, pointer_mode
, false);
7018 /* Same as build_pointer_type_for_mode, but for REFERENCE_TYPE. */
7021 build_reference_type_for_mode (tree to_type
, enum machine_mode mode
,
7026 if (to_type
== error_mark_node
)
7027 return error_mark_node
;
7029 /* If the pointed-to type has the may_alias attribute set, force
7030 a TYPE_REF_CAN_ALIAS_ALL pointer to be generated. */
7031 if (lookup_attribute ("may_alias", TYPE_ATTRIBUTES (to_type
)))
7032 can_alias_all
= true;
7034 /* In some cases, languages will have things that aren't a REFERENCE_TYPE
7035 (such as a RECORD_TYPE for fat pointers in Ada) as TYPE_REFERENCE_TO.
7036 In that case, return that type without regard to the rest of our
7039 ??? This is a kludge, but consistent with the way this function has
7040 always operated and there doesn't seem to be a good way to avoid this
7042 if (TYPE_REFERENCE_TO (to_type
) != 0
7043 && TREE_CODE (TYPE_REFERENCE_TO (to_type
)) != REFERENCE_TYPE
)
7044 return TYPE_REFERENCE_TO (to_type
);
7046 /* First, if we already have a type for pointers to TO_TYPE and it's
7047 the proper mode, use it. */
7048 for (t
= TYPE_REFERENCE_TO (to_type
); t
; t
= TYPE_NEXT_REF_TO (t
))
7049 if (TYPE_MODE (t
) == mode
&& TYPE_REF_CAN_ALIAS_ALL (t
) == can_alias_all
)
7052 t
= make_node (REFERENCE_TYPE
);
7054 TREE_TYPE (t
) = to_type
;
7055 SET_TYPE_MODE (t
, mode
);
7056 TYPE_REF_CAN_ALIAS_ALL (t
) = can_alias_all
;
7057 TYPE_NEXT_REF_TO (t
) = TYPE_REFERENCE_TO (to_type
);
7058 TYPE_REFERENCE_TO (to_type
) = t
;
7060 if (TYPE_STRUCTURAL_EQUALITY_P (to_type
))
7061 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7062 else if (TYPE_CANONICAL (to_type
) != to_type
)
7064 = build_reference_type_for_mode (TYPE_CANONICAL (to_type
),
7065 mode
, can_alias_all
);
7073 /* Build the node for the type of references-to-TO_TYPE by default
7077 build_reference_type (tree to_type
)
7079 addr_space_t as
= to_type
== error_mark_node
? ADDR_SPACE_GENERIC
7080 : TYPE_ADDR_SPACE (to_type
);
7081 enum machine_mode pointer_mode
= targetm
.addr_space
.pointer_mode (as
);
7082 return build_reference_type_for_mode (to_type
, pointer_mode
, false);
7085 /* Build a type that is compatible with t but has no cv quals anywhere
7088 const char *const *const * -> char ***. */
7091 build_type_no_quals (tree t
)
7093 switch (TREE_CODE (t
))
7096 return build_pointer_type_for_mode (build_type_no_quals (TREE_TYPE (t
)),
7098 TYPE_REF_CAN_ALIAS_ALL (t
));
7099 case REFERENCE_TYPE
:
7101 build_reference_type_for_mode (build_type_no_quals (TREE_TYPE (t
)),
7103 TYPE_REF_CAN_ALIAS_ALL (t
));
7105 return TYPE_MAIN_VARIANT (t
);
7109 #define MAX_INT_CACHED_PREC \
7110 (HOST_BITS_PER_WIDE_INT > 64 ? HOST_BITS_PER_WIDE_INT : 64)
7111 static GTY(()) tree nonstandard_integer_type_cache
[2 * MAX_INT_CACHED_PREC
+ 2];
7113 /* Builds a signed or unsigned integer type of precision PRECISION.
7114 Used for C bitfields whose precision does not match that of
7115 built-in target types. */
7117 build_nonstandard_integer_type (unsigned HOST_WIDE_INT precision
,
7123 unsignedp
= MAX_INT_CACHED_PREC
+ 1;
7125 if (precision
<= MAX_INT_CACHED_PREC
)
7127 itype
= nonstandard_integer_type_cache
[precision
+ unsignedp
];
7132 itype
= make_node (INTEGER_TYPE
);
7133 TYPE_PRECISION (itype
) = precision
;
7136 fixup_unsigned_type (itype
);
7138 fixup_signed_type (itype
);
7141 if (host_integerp (TYPE_MAX_VALUE (itype
), 1))
7142 ret
= type_hash_canon (tree_low_cst (TYPE_MAX_VALUE (itype
), 1), itype
);
7143 if (precision
<= MAX_INT_CACHED_PREC
)
7144 nonstandard_integer_type_cache
[precision
+ unsignedp
] = ret
;
7149 /* Create a range of some discrete type TYPE (an INTEGER_TYPE, ENUMERAL_TYPE
7150 or BOOLEAN_TYPE) with low bound LOWVAL and high bound HIGHVAL. If SHARED
7151 is true, reuse such a type that has already been constructed. */
7154 build_range_type_1 (tree type
, tree lowval
, tree highval
, bool shared
)
7156 tree itype
= make_node (INTEGER_TYPE
);
7157 hashval_t hashcode
= 0;
7159 TREE_TYPE (itype
) = type
;
7161 TYPE_MIN_VALUE (itype
) = fold_convert (type
, lowval
);
7162 TYPE_MAX_VALUE (itype
) = highval
? fold_convert (type
, highval
) : NULL
;
7164 TYPE_PRECISION (itype
) = TYPE_PRECISION (type
);
7165 SET_TYPE_MODE (itype
, TYPE_MODE (type
));
7166 TYPE_SIZE (itype
) = TYPE_SIZE (type
);
7167 TYPE_SIZE_UNIT (itype
) = TYPE_SIZE_UNIT (type
);
7168 TYPE_ALIGN (itype
) = TYPE_ALIGN (type
);
7169 TYPE_USER_ALIGN (itype
) = TYPE_USER_ALIGN (type
);
7174 if ((TYPE_MIN_VALUE (itype
)
7175 && TREE_CODE (TYPE_MIN_VALUE (itype
)) != INTEGER_CST
)
7176 || (TYPE_MAX_VALUE (itype
)
7177 && TREE_CODE (TYPE_MAX_VALUE (itype
)) != INTEGER_CST
))
7179 /* Since we cannot reliably merge this type, we need to compare it using
7180 structural equality checks. */
7181 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
7185 hashcode
= iterative_hash_expr (TYPE_MIN_VALUE (itype
), hashcode
);
7186 hashcode
= iterative_hash_expr (TYPE_MAX_VALUE (itype
), hashcode
);
7187 hashcode
= iterative_hash_hashval_t (TYPE_HASH (type
), hashcode
);
7188 itype
= type_hash_canon (hashcode
, itype
);
7193 /* Wrapper around build_range_type_1 with SHARED set to true. */
7196 build_range_type (tree type
, tree lowval
, tree highval
)
7198 return build_range_type_1 (type
, lowval
, highval
, true);
7201 /* Wrapper around build_range_type_1 with SHARED set to false. */
7204 build_nonshared_range_type (tree type
, tree lowval
, tree highval
)
7206 return build_range_type_1 (type
, lowval
, highval
, false);
7209 /* Create a type of integers to be the TYPE_DOMAIN of an ARRAY_TYPE.
7210 MAXVAL should be the maximum value in the domain
7211 (one less than the length of the array).
7213 The maximum value that MAXVAL can have is INT_MAX for a HOST_WIDE_INT.
7214 We don't enforce this limit, that is up to caller (e.g. language front end).
7215 The limit exists because the result is a signed type and we don't handle
7216 sizes that use more than one HOST_WIDE_INT. */
7219 build_index_type (tree maxval
)
7221 return build_range_type (sizetype
, size_zero_node
, maxval
);
7224 /* Return true if the debug information for TYPE, a subtype, should be emitted
7225 as a subrange type. If so, set LOWVAL to the low bound and HIGHVAL to the
7226 high bound, respectively. Sometimes doing so unnecessarily obfuscates the
7227 debug info and doesn't reflect the source code. */
7230 subrange_type_for_debug_p (const_tree type
, tree
*lowval
, tree
*highval
)
7232 tree base_type
= TREE_TYPE (type
), low
, high
;
7234 /* Subrange types have a base type which is an integral type. */
7235 if (!INTEGRAL_TYPE_P (base_type
))
7238 /* Get the real bounds of the subtype. */
7239 if (lang_hooks
.types
.get_subrange_bounds
)
7240 lang_hooks
.types
.get_subrange_bounds (type
, &low
, &high
);
7243 low
= TYPE_MIN_VALUE (type
);
7244 high
= TYPE_MAX_VALUE (type
);
7247 /* If the type and its base type have the same representation and the same
7248 name, then the type is not a subrange but a copy of the base type. */
7249 if ((TREE_CODE (base_type
) == INTEGER_TYPE
7250 || TREE_CODE (base_type
) == BOOLEAN_TYPE
)
7251 && int_size_in_bytes (type
) == int_size_in_bytes (base_type
)
7252 && tree_int_cst_equal (low
, TYPE_MIN_VALUE (base_type
))
7253 && tree_int_cst_equal (high
, TYPE_MAX_VALUE (base_type
)))
7255 tree type_name
= TYPE_NAME (type
);
7256 tree base_type_name
= TYPE_NAME (base_type
);
7258 if (type_name
&& TREE_CODE (type_name
) == TYPE_DECL
)
7259 type_name
= DECL_NAME (type_name
);
7261 if (base_type_name
&& TREE_CODE (base_type_name
) == TYPE_DECL
)
7262 base_type_name
= DECL_NAME (base_type_name
);
7264 if (type_name
== base_type_name
)
7275 /* Construct, lay out and return the type of arrays of elements with ELT_TYPE
7276 and number of elements specified by the range of values of INDEX_TYPE.
7277 If SHARED is true, reuse such a type that has already been constructed. */
7280 build_array_type_1 (tree elt_type
, tree index_type
, bool shared
)
7284 if (TREE_CODE (elt_type
) == FUNCTION_TYPE
)
7286 error ("arrays of functions are not meaningful");
7287 elt_type
= integer_type_node
;
7290 t
= make_node (ARRAY_TYPE
);
7291 TREE_TYPE (t
) = elt_type
;
7292 TYPE_DOMAIN (t
) = index_type
;
7293 TYPE_ADDR_SPACE (t
) = TYPE_ADDR_SPACE (elt_type
);
7296 /* If the element type is incomplete at this point we get marked for
7297 structural equality. Do not record these types in the canonical
7299 if (TYPE_STRUCTURAL_EQUALITY_P (t
))
7304 hashval_t hashcode
= iterative_hash_object (TYPE_HASH (elt_type
), 0);
7306 hashcode
= iterative_hash_object (TYPE_HASH (index_type
), hashcode
);
7307 t
= type_hash_canon (hashcode
, t
);
7310 if (TYPE_CANONICAL (t
) == t
)
7312 if (TYPE_STRUCTURAL_EQUALITY_P (elt_type
)
7313 || (index_type
&& TYPE_STRUCTURAL_EQUALITY_P (index_type
)))
7314 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7315 else if (TYPE_CANONICAL (elt_type
) != elt_type
7316 || (index_type
&& TYPE_CANONICAL (index_type
) != index_type
))
7318 = build_array_type_1 (TYPE_CANONICAL (elt_type
),
7320 ? TYPE_CANONICAL (index_type
) : NULL_TREE
,
7327 /* Wrapper around build_array_type_1 with SHARED set to true. */
7330 build_array_type (tree elt_type
, tree index_type
)
7332 return build_array_type_1 (elt_type
, index_type
, true);
7335 /* Wrapper around build_array_type_1 with SHARED set to false. */
7338 build_nonshared_array_type (tree elt_type
, tree index_type
)
7340 return build_array_type_1 (elt_type
, index_type
, false);
7343 /* Return a representation of ELT_TYPE[NELTS], using indices of type
7347 build_array_type_nelts (tree elt_type
, unsigned HOST_WIDE_INT nelts
)
7349 return build_array_type (elt_type
, build_index_type (size_int (nelts
- 1)));
7352 /* Recursively examines the array elements of TYPE, until a non-array
7353 element type is found. */
7356 strip_array_types (tree type
)
7358 while (TREE_CODE (type
) == ARRAY_TYPE
)
7359 type
= TREE_TYPE (type
);
7364 /* Computes the canonical argument types from the argument type list
7367 Upon return, *ANY_STRUCTURAL_P will be true iff either it was true
7368 on entry to this function, or if any of the ARGTYPES are
7371 Upon return, *ANY_NONCANONICAL_P will be true iff either it was
7372 true on entry to this function, or if any of the ARGTYPES are
7375 Returns a canonical argument list, which may be ARGTYPES when the
7376 canonical argument list is unneeded (i.e., *ANY_STRUCTURAL_P is
7377 true) or would not differ from ARGTYPES. */
7380 maybe_canonicalize_argtypes(tree argtypes
,
7381 bool *any_structural_p
,
7382 bool *any_noncanonical_p
)
7385 bool any_noncanonical_argtypes_p
= false;
7387 for (arg
= argtypes
; arg
&& !(*any_structural_p
); arg
= TREE_CHAIN (arg
))
7389 if (!TREE_VALUE (arg
) || TREE_VALUE (arg
) == error_mark_node
)
7390 /* Fail gracefully by stating that the type is structural. */
7391 *any_structural_p
= true;
7392 else if (TYPE_STRUCTURAL_EQUALITY_P (TREE_VALUE (arg
)))
7393 *any_structural_p
= true;
7394 else if (TYPE_CANONICAL (TREE_VALUE (arg
)) != TREE_VALUE (arg
)
7395 || TREE_PURPOSE (arg
))
7396 /* If the argument has a default argument, we consider it
7397 non-canonical even though the type itself is canonical.
7398 That way, different variants of function and method types
7399 with default arguments will all point to the variant with
7400 no defaults as their canonical type. */
7401 any_noncanonical_argtypes_p
= true;
7404 if (*any_structural_p
)
7407 if (any_noncanonical_argtypes_p
)
7409 /* Build the canonical list of argument types. */
7410 tree canon_argtypes
= NULL_TREE
;
7411 bool is_void
= false;
7413 for (arg
= argtypes
; arg
; arg
= TREE_CHAIN (arg
))
7415 if (arg
== void_list_node
)
7418 canon_argtypes
= tree_cons (NULL_TREE
,
7419 TYPE_CANONICAL (TREE_VALUE (arg
)),
7423 canon_argtypes
= nreverse (canon_argtypes
);
7425 canon_argtypes
= chainon (canon_argtypes
, void_list_node
);
7427 /* There is a non-canonical type. */
7428 *any_noncanonical_p
= true;
7429 return canon_argtypes
;
7432 /* The canonical argument types are the same as ARGTYPES. */
7436 /* Construct, lay out and return
7437 the type of functions returning type VALUE_TYPE
7438 given arguments of types ARG_TYPES.
7439 ARG_TYPES is a chain of TREE_LIST nodes whose TREE_VALUEs
7440 are data type nodes for the arguments of the function.
7441 If such a type has already been constructed, reuse it. */
7444 build_function_type (tree value_type
, tree arg_types
)
7447 hashval_t hashcode
= 0;
7448 bool any_structural_p
, any_noncanonical_p
;
7449 tree canon_argtypes
;
7451 if (TREE_CODE (value_type
) == FUNCTION_TYPE
)
7453 error ("function return type cannot be function");
7454 value_type
= integer_type_node
;
7457 /* Make a node of the sort we want. */
7458 t
= make_node (FUNCTION_TYPE
);
7459 TREE_TYPE (t
) = value_type
;
7460 TYPE_ARG_TYPES (t
) = arg_types
;
7462 /* If we already have such a type, use the old one. */
7463 hashcode
= iterative_hash_object (TYPE_HASH (value_type
), hashcode
);
7464 hashcode
= type_hash_list (arg_types
, hashcode
);
7465 t
= type_hash_canon (hashcode
, t
);
7467 /* Set up the canonical type. */
7468 any_structural_p
= TYPE_STRUCTURAL_EQUALITY_P (value_type
);
7469 any_noncanonical_p
= TYPE_CANONICAL (value_type
) != value_type
;
7470 canon_argtypes
= maybe_canonicalize_argtypes (arg_types
,
7472 &any_noncanonical_p
);
7473 if (any_structural_p
)
7474 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7475 else if (any_noncanonical_p
)
7476 TYPE_CANONICAL (t
) = build_function_type (TYPE_CANONICAL (value_type
),
7479 if (!COMPLETE_TYPE_P (t
))
7484 /* Build variant of function type ORIG_TYPE skipping ARGS_TO_SKIP. */
7487 build_function_type_skip_args (tree orig_type
, bitmap args_to_skip
)
7489 tree new_type
= NULL
;
7490 tree args
, new_args
= NULL
, t
;
7494 for (args
= TYPE_ARG_TYPES (orig_type
); args
&& args
!= void_list_node
;
7495 args
= TREE_CHAIN (args
), i
++)
7496 if (!bitmap_bit_p (args_to_skip
, i
))
7497 new_args
= tree_cons (NULL_TREE
, TREE_VALUE (args
), new_args
);
7499 new_reversed
= nreverse (new_args
);
7503 TREE_CHAIN (new_args
) = void_list_node
;
7505 new_reversed
= void_list_node
;
7508 /* Use copy_node to preserve as much as possible from original type
7509 (debug info, attribute lists etc.)
7510 Exception is METHOD_TYPEs must have THIS argument.
7511 When we are asked to remove it, we need to build new FUNCTION_TYPE
7513 if (TREE_CODE (orig_type
) != METHOD_TYPE
7514 || !bitmap_bit_p (args_to_skip
, 0))
7516 new_type
= build_distinct_type_copy (orig_type
);
7517 TYPE_ARG_TYPES (new_type
) = new_reversed
;
7522 = build_distinct_type_copy (build_function_type (TREE_TYPE (orig_type
),
7524 TYPE_CONTEXT (new_type
) = TYPE_CONTEXT (orig_type
);
7527 /* This is a new type, not a copy of an old type. Need to reassociate
7528 variants. We can handle everything except the main variant lazily. */
7529 t
= TYPE_MAIN_VARIANT (orig_type
);
7532 TYPE_MAIN_VARIANT (new_type
) = t
;
7533 TYPE_NEXT_VARIANT (new_type
) = TYPE_NEXT_VARIANT (t
);
7534 TYPE_NEXT_VARIANT (t
) = new_type
;
7538 TYPE_MAIN_VARIANT (new_type
) = new_type
;
7539 TYPE_NEXT_VARIANT (new_type
) = NULL
;
7544 /* Build variant of function type ORIG_TYPE skipping ARGS_TO_SKIP.
7546 Arguments from DECL_ARGUMENTS list can't be removed now, since they are
7547 linked by TREE_CHAIN directly. The caller is responsible for eliminating
7548 them when they are being duplicated (i.e. copy_arguments_for_versioning). */
7551 build_function_decl_skip_args (tree orig_decl
, bitmap args_to_skip
)
7553 tree new_decl
= copy_node (orig_decl
);
7556 new_type
= TREE_TYPE (orig_decl
);
7557 if (prototype_p (new_type
))
7558 new_type
= build_function_type_skip_args (new_type
, args_to_skip
);
7559 TREE_TYPE (new_decl
) = new_type
;
7561 /* For declarations setting DECL_VINDEX (i.e. methods)
7562 we expect first argument to be THIS pointer. */
7563 if (bitmap_bit_p (args_to_skip
, 0))
7564 DECL_VINDEX (new_decl
) = NULL_TREE
;
7566 /* When signature changes, we need to clear builtin info. */
7567 if (DECL_BUILT_IN (new_decl
) && !bitmap_empty_p (args_to_skip
))
7569 DECL_BUILT_IN_CLASS (new_decl
) = NOT_BUILT_IN
;
7570 DECL_FUNCTION_CODE (new_decl
) = (enum built_in_function
) 0;
7575 /* Build a function type. The RETURN_TYPE is the type returned by the
7576 function. If VAARGS is set, no void_type_node is appended to the
7577 the list. ARGP must be always be terminated be a NULL_TREE. */
7580 build_function_type_list_1 (bool vaargs
, tree return_type
, va_list argp
)
7584 t
= va_arg (argp
, tree
);
7585 for (args
= NULL_TREE
; t
!= NULL_TREE
; t
= va_arg (argp
, tree
))
7586 args
= tree_cons (NULL_TREE
, t
, args
);
7591 if (args
!= NULL_TREE
)
7592 args
= nreverse (args
);
7593 gcc_assert (last
!= void_list_node
);
7595 else if (args
== NULL_TREE
)
7596 args
= void_list_node
;
7600 args
= nreverse (args
);
7601 TREE_CHAIN (last
) = void_list_node
;
7603 args
= build_function_type (return_type
, args
);
7608 /* Build a function type. The RETURN_TYPE is the type returned by the
7609 function. If additional arguments are provided, they are
7610 additional argument types. The list of argument types must always
7611 be terminated by NULL_TREE. */
7614 build_function_type_list (tree return_type
, ...)
7619 va_start (p
, return_type
);
7620 args
= build_function_type_list_1 (false, return_type
, p
);
7625 /* Build a variable argument function type. The RETURN_TYPE is the
7626 type returned by the function. If additional arguments are provided,
7627 they are additional argument types. The list of argument types must
7628 always be terminated by NULL_TREE. */
7631 build_varargs_function_type_list (tree return_type
, ...)
7636 va_start (p
, return_type
);
7637 args
= build_function_type_list_1 (true, return_type
, p
);
7643 /* Build a METHOD_TYPE for a member of BASETYPE. The RETTYPE (a TYPE)
7644 and ARGTYPES (a TREE_LIST) are the return type and arguments types
7645 for the method. An implicit additional parameter (of type
7646 pointer-to-BASETYPE) is added to the ARGTYPES. */
7649 build_method_type_directly (tree basetype
,
7656 bool any_structural_p
, any_noncanonical_p
;
7657 tree canon_argtypes
;
7659 /* Make a node of the sort we want. */
7660 t
= make_node (METHOD_TYPE
);
7662 TYPE_METHOD_BASETYPE (t
) = TYPE_MAIN_VARIANT (basetype
);
7663 TREE_TYPE (t
) = rettype
;
7664 ptype
= build_pointer_type (basetype
);
7666 /* The actual arglist for this function includes a "hidden" argument
7667 which is "this". Put it into the list of argument types. */
7668 argtypes
= tree_cons (NULL_TREE
, ptype
, argtypes
);
7669 TYPE_ARG_TYPES (t
) = argtypes
;
7671 /* If we already have such a type, use the old one. */
7672 hashcode
= iterative_hash_object (TYPE_HASH (basetype
), hashcode
);
7673 hashcode
= iterative_hash_object (TYPE_HASH (rettype
), hashcode
);
7674 hashcode
= type_hash_list (argtypes
, hashcode
);
7675 t
= type_hash_canon (hashcode
, t
);
7677 /* Set up the canonical type. */
7679 = (TYPE_STRUCTURAL_EQUALITY_P (basetype
)
7680 || TYPE_STRUCTURAL_EQUALITY_P (rettype
));
7682 = (TYPE_CANONICAL (basetype
) != basetype
7683 || TYPE_CANONICAL (rettype
) != rettype
);
7684 canon_argtypes
= maybe_canonicalize_argtypes (TREE_CHAIN (argtypes
),
7686 &any_noncanonical_p
);
7687 if (any_structural_p
)
7688 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7689 else if (any_noncanonical_p
)
7691 = build_method_type_directly (TYPE_CANONICAL (basetype
),
7692 TYPE_CANONICAL (rettype
),
7694 if (!COMPLETE_TYPE_P (t
))
7700 /* Construct, lay out and return the type of methods belonging to class
7701 BASETYPE and whose arguments and values are described by TYPE.
7702 If that type exists already, reuse it.
7703 TYPE must be a FUNCTION_TYPE node. */
7706 build_method_type (tree basetype
, tree type
)
7708 gcc_assert (TREE_CODE (type
) == FUNCTION_TYPE
);
7710 return build_method_type_directly (basetype
,
7712 TYPE_ARG_TYPES (type
));
7715 /* Construct, lay out and return the type of offsets to a value
7716 of type TYPE, within an object of type BASETYPE.
7717 If a suitable offset type exists already, reuse it. */
7720 build_offset_type (tree basetype
, tree type
)
7723 hashval_t hashcode
= 0;
7725 /* Make a node of the sort we want. */
7726 t
= make_node (OFFSET_TYPE
);
7728 TYPE_OFFSET_BASETYPE (t
) = TYPE_MAIN_VARIANT (basetype
);
7729 TREE_TYPE (t
) = type
;
7731 /* If we already have such a type, use the old one. */
7732 hashcode
= iterative_hash_object (TYPE_HASH (basetype
), hashcode
);
7733 hashcode
= iterative_hash_object (TYPE_HASH (type
), hashcode
);
7734 t
= type_hash_canon (hashcode
, t
);
7736 if (!COMPLETE_TYPE_P (t
))
7739 if (TYPE_CANONICAL (t
) == t
)
7741 if (TYPE_STRUCTURAL_EQUALITY_P (basetype
)
7742 || TYPE_STRUCTURAL_EQUALITY_P (type
))
7743 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7744 else if (TYPE_CANONICAL (TYPE_MAIN_VARIANT (basetype
)) != basetype
7745 || TYPE_CANONICAL (type
) != type
)
7747 = build_offset_type (TYPE_CANONICAL (TYPE_MAIN_VARIANT (basetype
)),
7748 TYPE_CANONICAL (type
));
7754 /* Create a complex type whose components are COMPONENT_TYPE. */
7757 build_complex_type (tree component_type
)
7762 gcc_assert (INTEGRAL_TYPE_P (component_type
)
7763 || SCALAR_FLOAT_TYPE_P (component_type
)
7764 || FIXED_POINT_TYPE_P (component_type
));
7766 /* Make a node of the sort we want. */
7767 t
= make_node (COMPLEX_TYPE
);
7769 TREE_TYPE (t
) = TYPE_MAIN_VARIANT (component_type
);
7771 /* If we already have such a type, use the old one. */
7772 hashcode
= iterative_hash_object (TYPE_HASH (component_type
), 0);
7773 t
= type_hash_canon (hashcode
, t
);
7775 if (!COMPLETE_TYPE_P (t
))
7778 if (TYPE_CANONICAL (t
) == t
)
7780 if (TYPE_STRUCTURAL_EQUALITY_P (component_type
))
7781 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7782 else if (TYPE_CANONICAL (component_type
) != component_type
)
7784 = build_complex_type (TYPE_CANONICAL (component_type
));
7787 /* We need to create a name, since complex is a fundamental type. */
7788 if (! TYPE_NAME (t
))
7791 if (component_type
== char_type_node
)
7792 name
= "complex char";
7793 else if (component_type
== signed_char_type_node
)
7794 name
= "complex signed char";
7795 else if (component_type
== unsigned_char_type_node
)
7796 name
= "complex unsigned char";
7797 else if (component_type
== short_integer_type_node
)
7798 name
= "complex short int";
7799 else if (component_type
== short_unsigned_type_node
)
7800 name
= "complex short unsigned int";
7801 else if (component_type
== integer_type_node
)
7802 name
= "complex int";
7803 else if (component_type
== unsigned_type_node
)
7804 name
= "complex unsigned int";
7805 else if (component_type
== long_integer_type_node
)
7806 name
= "complex long int";
7807 else if (component_type
== long_unsigned_type_node
)
7808 name
= "complex long unsigned int";
7809 else if (component_type
== long_long_integer_type_node
)
7810 name
= "complex long long int";
7811 else if (component_type
== long_long_unsigned_type_node
)
7812 name
= "complex long long unsigned int";
7817 TYPE_NAME (t
) = build_decl (UNKNOWN_LOCATION
, TYPE_DECL
,
7818 get_identifier (name
), t
);
7821 return build_qualified_type (t
, TYPE_QUALS (component_type
));
7824 /* If TYPE is a real or complex floating-point type and the target
7825 does not directly support arithmetic on TYPE then return the wider
7826 type to be used for arithmetic on TYPE. Otherwise, return
7830 excess_precision_type (tree type
)
7832 if (flag_excess_precision
!= EXCESS_PRECISION_FAST
)
7834 int flt_eval_method
= TARGET_FLT_EVAL_METHOD
;
7835 switch (TREE_CODE (type
))
7838 switch (flt_eval_method
)
7841 if (TYPE_MODE (type
) == TYPE_MODE (float_type_node
))
7842 return double_type_node
;
7845 if (TYPE_MODE (type
) == TYPE_MODE (float_type_node
)
7846 || TYPE_MODE (type
) == TYPE_MODE (double_type_node
))
7847 return long_double_type_node
;
7854 if (TREE_CODE (TREE_TYPE (type
)) != REAL_TYPE
)
7856 switch (flt_eval_method
)
7859 if (TYPE_MODE (TREE_TYPE (type
)) == TYPE_MODE (float_type_node
))
7860 return complex_double_type_node
;
7863 if (TYPE_MODE (TREE_TYPE (type
)) == TYPE_MODE (float_type_node
)
7864 || (TYPE_MODE (TREE_TYPE (type
))
7865 == TYPE_MODE (double_type_node
)))
7866 return complex_long_double_type_node
;
7879 /* Return OP, stripped of any conversions to wider types as much as is safe.
7880 Converting the value back to OP's type makes a value equivalent to OP.
7882 If FOR_TYPE is nonzero, we return a value which, if converted to
7883 type FOR_TYPE, would be equivalent to converting OP to type FOR_TYPE.
7885 OP must have integer, real or enumeral type. Pointers are not allowed!
7887 There are some cases where the obvious value we could return
7888 would regenerate to OP if converted to OP's type,
7889 but would not extend like OP to wider types.
7890 If FOR_TYPE indicates such extension is contemplated, we eschew such values.
7891 For example, if OP is (unsigned short)(signed char)-1,
7892 we avoid returning (signed char)-1 if FOR_TYPE is int,
7893 even though extending that to an unsigned short would regenerate OP,
7894 since the result of extending (signed char)-1 to (int)
7895 is different from (int) OP. */
7898 get_unwidened (tree op
, tree for_type
)
7900 /* Set UNS initially if converting OP to FOR_TYPE is a zero-extension. */
7901 tree type
= TREE_TYPE (op
);
7903 = TYPE_PRECISION (for_type
!= 0 ? for_type
: type
);
7905 = (for_type
!= 0 && for_type
!= type
7906 && final_prec
> TYPE_PRECISION (type
)
7907 && TYPE_UNSIGNED (type
));
7910 while (CONVERT_EXPR_P (op
))
7914 /* TYPE_PRECISION on vector types has different meaning
7915 (TYPE_VECTOR_SUBPARTS) and casts from vectors are view conversions,
7916 so avoid them here. */
7917 if (TREE_CODE (TREE_TYPE (TREE_OPERAND (op
, 0))) == VECTOR_TYPE
)
7920 bitschange
= TYPE_PRECISION (TREE_TYPE (op
))
7921 - TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (op
, 0)));
7923 /* Truncations are many-one so cannot be removed.
7924 Unless we are later going to truncate down even farther. */
7926 && final_prec
> TYPE_PRECISION (TREE_TYPE (op
)))
7929 /* See what's inside this conversion. If we decide to strip it,
7931 op
= TREE_OPERAND (op
, 0);
7933 /* If we have not stripped any zero-extensions (uns is 0),
7934 we can strip any kind of extension.
7935 If we have previously stripped a zero-extension,
7936 only zero-extensions can safely be stripped.
7937 Any extension can be stripped if the bits it would produce
7938 are all going to be discarded later by truncating to FOR_TYPE. */
7942 if (! uns
|| final_prec
<= TYPE_PRECISION (TREE_TYPE (op
)))
7944 /* TYPE_UNSIGNED says whether this is a zero-extension.
7945 Let's avoid computing it if it does not affect WIN
7946 and if UNS will not be needed again. */
7948 || CONVERT_EXPR_P (op
))
7949 && TYPE_UNSIGNED (TREE_TYPE (op
)))
7957 /* If we finally reach a constant see if it fits in for_type and
7958 in that case convert it. */
7960 && TREE_CODE (win
) == INTEGER_CST
7961 && TREE_TYPE (win
) != for_type
7962 && int_fits_type_p (win
, for_type
))
7963 win
= fold_convert (for_type
, win
);
7968 /* Return OP or a simpler expression for a narrower value
7969 which can be sign-extended or zero-extended to give back OP.
7970 Store in *UNSIGNEDP_PTR either 1 if the value should be zero-extended
7971 or 0 if the value should be sign-extended. */
7974 get_narrower (tree op
, int *unsignedp_ptr
)
7979 bool integral_p
= INTEGRAL_TYPE_P (TREE_TYPE (op
));
7981 while (TREE_CODE (op
) == NOP_EXPR
)
7984 = (TYPE_PRECISION (TREE_TYPE (op
))
7985 - TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (op
, 0))));
7987 /* Truncations are many-one so cannot be removed. */
7991 /* See what's inside this conversion. If we decide to strip it,
7996 op
= TREE_OPERAND (op
, 0);
7997 /* An extension: the outermost one can be stripped,
7998 but remember whether it is zero or sign extension. */
8000 uns
= TYPE_UNSIGNED (TREE_TYPE (op
));
8001 /* Otherwise, if a sign extension has been stripped,
8002 only sign extensions can now be stripped;
8003 if a zero extension has been stripped, only zero-extensions. */
8004 else if (uns
!= TYPE_UNSIGNED (TREE_TYPE (op
)))
8008 else /* bitschange == 0 */
8010 /* A change in nominal type can always be stripped, but we must
8011 preserve the unsignedness. */
8013 uns
= TYPE_UNSIGNED (TREE_TYPE (op
));
8015 op
= TREE_OPERAND (op
, 0);
8016 /* Keep trying to narrow, but don't assign op to win if it
8017 would turn an integral type into something else. */
8018 if (INTEGRAL_TYPE_P (TREE_TYPE (op
)) != integral_p
)
8025 if (TREE_CODE (op
) == COMPONENT_REF
8026 /* Since type_for_size always gives an integer type. */
8027 && TREE_CODE (TREE_TYPE (op
)) != REAL_TYPE
8028 && TREE_CODE (TREE_TYPE (op
)) != FIXED_POINT_TYPE
8029 /* Ensure field is laid out already. */
8030 && DECL_SIZE (TREE_OPERAND (op
, 1)) != 0
8031 && host_integerp (DECL_SIZE (TREE_OPERAND (op
, 1)), 1))
8033 unsigned HOST_WIDE_INT innerprec
8034 = tree_low_cst (DECL_SIZE (TREE_OPERAND (op
, 1)), 1);
8035 int unsignedp
= (DECL_UNSIGNED (TREE_OPERAND (op
, 1))
8036 || TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (op
, 1))));
8037 tree type
= lang_hooks
.types
.type_for_size (innerprec
, unsignedp
);
8039 /* We can get this structure field in a narrower type that fits it,
8040 but the resulting extension to its nominal type (a fullword type)
8041 must satisfy the same conditions as for other extensions.
8043 Do this only for fields that are aligned (not bit-fields),
8044 because when bit-field insns will be used there is no
8045 advantage in doing this. */
8047 if (innerprec
< TYPE_PRECISION (TREE_TYPE (op
))
8048 && ! DECL_BIT_FIELD (TREE_OPERAND (op
, 1))
8049 && (first
|| uns
== DECL_UNSIGNED (TREE_OPERAND (op
, 1)))
8053 uns
= DECL_UNSIGNED (TREE_OPERAND (op
, 1));
8054 win
= fold_convert (type
, op
);
8058 *unsignedp_ptr
= uns
;
8062 /* Returns true if integer constant C has a value that is permissible
8063 for type TYPE (an INTEGER_TYPE). */
8066 int_fits_type_p (const_tree c
, const_tree type
)
8068 tree type_low_bound
, type_high_bound
;
8069 bool ok_for_low_bound
, ok_for_high_bound
, unsc
;
8072 dc
= tree_to_double_int (c
);
8073 unsc
= TYPE_UNSIGNED (TREE_TYPE (c
));
8075 if (TREE_CODE (TREE_TYPE (c
)) == INTEGER_TYPE
8076 && TYPE_IS_SIZETYPE (TREE_TYPE (c
))
8078 /* So c is an unsigned integer whose type is sizetype and type is not.
8079 sizetype'd integers are sign extended even though they are
8080 unsigned. If the integer value fits in the lower end word of c,
8081 and if the higher end word has all its bits set to 1, that
8082 means the higher end bits are set to 1 only for sign extension.
8083 So let's convert c into an equivalent zero extended unsigned
8085 dc
= double_int_zext (dc
, TYPE_PRECISION (TREE_TYPE (c
)));
8088 type_low_bound
= TYPE_MIN_VALUE (type
);
8089 type_high_bound
= TYPE_MAX_VALUE (type
);
8091 /* If at least one bound of the type is a constant integer, we can check
8092 ourselves and maybe make a decision. If no such decision is possible, but
8093 this type is a subtype, try checking against that. Otherwise, use
8094 double_int_fits_to_tree_p, which checks against the precision.
8096 Compute the status for each possibly constant bound, and return if we see
8097 one does not match. Use ok_for_xxx_bound for this purpose, assigning -1
8098 for "unknown if constant fits", 0 for "constant known *not* to fit" and 1
8099 for "constant known to fit". */
8101 /* Check if c >= type_low_bound. */
8102 if (type_low_bound
&& TREE_CODE (type_low_bound
) == INTEGER_CST
)
8104 dd
= tree_to_double_int (type_low_bound
);
8105 if (TREE_CODE (type
) == INTEGER_TYPE
8106 && TYPE_IS_SIZETYPE (type
)
8107 && TYPE_UNSIGNED (type
))
8108 dd
= double_int_zext (dd
, TYPE_PRECISION (type
));
8109 if (unsc
!= TYPE_UNSIGNED (TREE_TYPE (type_low_bound
)))
8111 int c_neg
= (!unsc
&& double_int_negative_p (dc
));
8112 int t_neg
= (unsc
&& double_int_negative_p (dd
));
8114 if (c_neg
&& !t_neg
)
8116 if ((c_neg
|| !t_neg
) && double_int_ucmp (dc
, dd
) < 0)
8119 else if (double_int_cmp (dc
, dd
, unsc
) < 0)
8121 ok_for_low_bound
= true;
8124 ok_for_low_bound
= false;
8126 /* Check if c <= type_high_bound. */
8127 if (type_high_bound
&& TREE_CODE (type_high_bound
) == INTEGER_CST
)
8129 dd
= tree_to_double_int (type_high_bound
);
8130 if (TREE_CODE (type
) == INTEGER_TYPE
8131 && TYPE_IS_SIZETYPE (type
)
8132 && TYPE_UNSIGNED (type
))
8133 dd
= double_int_zext (dd
, TYPE_PRECISION (type
));
8134 if (unsc
!= TYPE_UNSIGNED (TREE_TYPE (type_high_bound
)))
8136 int c_neg
= (!unsc
&& double_int_negative_p (dc
));
8137 int t_neg
= (unsc
&& double_int_negative_p (dd
));
8139 if (t_neg
&& !c_neg
)
8141 if ((t_neg
|| !c_neg
) && double_int_ucmp (dc
, dd
) > 0)
8144 else if (double_int_cmp (dc
, dd
, unsc
) > 0)
8146 ok_for_high_bound
= true;
8149 ok_for_high_bound
= false;
8151 /* If the constant fits both bounds, the result is known. */
8152 if (ok_for_low_bound
&& ok_for_high_bound
)
8155 /* Perform some generic filtering which may allow making a decision
8156 even if the bounds are not constant. First, negative integers
8157 never fit in unsigned types, */
8158 if (TYPE_UNSIGNED (type
) && !unsc
&& double_int_negative_p (dc
))
8161 /* Second, narrower types always fit in wider ones. */
8162 if (TYPE_PRECISION (type
) > TYPE_PRECISION (TREE_TYPE (c
)))
8165 /* Third, unsigned integers with top bit set never fit signed types. */
8166 if (! TYPE_UNSIGNED (type
) && unsc
)
8168 int prec
= GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (c
))) - 1;
8169 if (prec
< HOST_BITS_PER_WIDE_INT
)
8171 if (((((unsigned HOST_WIDE_INT
) 1) << prec
) & dc
.low
) != 0)
8174 else if (((((unsigned HOST_WIDE_INT
) 1)
8175 << (prec
- HOST_BITS_PER_WIDE_INT
)) & dc
.high
) != 0)
8179 /* If we haven't been able to decide at this point, there nothing more we
8180 can check ourselves here. Look at the base type if we have one and it
8181 has the same precision. */
8182 if (TREE_CODE (type
) == INTEGER_TYPE
8183 && TREE_TYPE (type
) != 0
8184 && TYPE_PRECISION (type
) == TYPE_PRECISION (TREE_TYPE (type
)))
8186 type
= TREE_TYPE (type
);
8190 /* Or to double_int_fits_to_tree_p, if nothing else. */
8191 return double_int_fits_to_tree_p (type
, dc
);
8194 /* Stores bounds of an integer TYPE in MIN and MAX. If TYPE has non-constant
8195 bounds or is a POINTER_TYPE, the maximum and/or minimum values that can be
8196 represented (assuming two's-complement arithmetic) within the bit
8197 precision of the type are returned instead. */
8200 get_type_static_bounds (const_tree type
, mpz_t min
, mpz_t max
)
8202 if (!POINTER_TYPE_P (type
) && TYPE_MIN_VALUE (type
)
8203 && TREE_CODE (TYPE_MIN_VALUE (type
)) == INTEGER_CST
)
8204 mpz_set_double_int (min
, tree_to_double_int (TYPE_MIN_VALUE (type
)),
8205 TYPE_UNSIGNED (type
));
8208 if (TYPE_UNSIGNED (type
))
8209 mpz_set_ui (min
, 0);
8213 mn
= double_int_mask (TYPE_PRECISION (type
) - 1);
8214 mn
= double_int_sext (double_int_add (mn
, double_int_one
),
8215 TYPE_PRECISION (type
));
8216 mpz_set_double_int (min
, mn
, false);
8220 if (!POINTER_TYPE_P (type
) && TYPE_MAX_VALUE (type
)
8221 && TREE_CODE (TYPE_MAX_VALUE (type
)) == INTEGER_CST
)
8222 mpz_set_double_int (max
, tree_to_double_int (TYPE_MAX_VALUE (type
)),
8223 TYPE_UNSIGNED (type
));
8226 if (TYPE_UNSIGNED (type
))
8227 mpz_set_double_int (max
, double_int_mask (TYPE_PRECISION (type
)),
8230 mpz_set_double_int (max
, double_int_mask (TYPE_PRECISION (type
) - 1),
8235 /* Return true if VAR is an automatic variable defined in function FN. */
8238 auto_var_in_fn_p (const_tree var
, const_tree fn
)
8240 return (DECL_P (var
) && DECL_CONTEXT (var
) == fn
8241 && ((((TREE_CODE (var
) == VAR_DECL
&& ! DECL_EXTERNAL (var
))
8242 || TREE_CODE (var
) == PARM_DECL
)
8243 && ! TREE_STATIC (var
))
8244 || TREE_CODE (var
) == LABEL_DECL
8245 || TREE_CODE (var
) == RESULT_DECL
));
8248 /* Subprogram of following function. Called by walk_tree.
8250 Return *TP if it is an automatic variable or parameter of the
8251 function passed in as DATA. */
8254 find_var_from_fn (tree
*tp
, int *walk_subtrees
, void *data
)
8256 tree fn
= (tree
) data
;
8261 else if (DECL_P (*tp
)
8262 && auto_var_in_fn_p (*tp
, fn
))
8268 /* Returns true if T is, contains, or refers to a type with variable
8269 size. For METHOD_TYPEs and FUNCTION_TYPEs we exclude the
8270 arguments, but not the return type. If FN is nonzero, only return
8271 true if a modifier of the type or position of FN is a variable or
8272 parameter inside FN.
8274 This concept is more general than that of C99 'variably modified types':
8275 in C99, a struct type is never variably modified because a VLA may not
8276 appear as a structure member. However, in GNU C code like:
8278 struct S { int i[f()]; };
8280 is valid, and other languages may define similar constructs. */
8283 variably_modified_type_p (tree type
, tree fn
)
8287 /* Test if T is either variable (if FN is zero) or an expression containing
8288 a variable in FN. */
8289 #define RETURN_TRUE_IF_VAR(T) \
8290 do { tree _t = (T); \
8291 if (_t && _t != error_mark_node && TREE_CODE (_t) != INTEGER_CST \
8292 && (!fn || walk_tree (&_t, find_var_from_fn, fn, NULL))) \
8293 return true; } while (0)
8295 if (type
== error_mark_node
)
8298 /* If TYPE itself has variable size, it is variably modified. */
8299 RETURN_TRUE_IF_VAR (TYPE_SIZE (type
));
8300 RETURN_TRUE_IF_VAR (TYPE_SIZE_UNIT (type
));
8302 switch (TREE_CODE (type
))
8305 case REFERENCE_TYPE
:
8307 if (variably_modified_type_p (TREE_TYPE (type
), fn
))
8313 /* If TYPE is a function type, it is variably modified if the
8314 return type is variably modified. */
8315 if (variably_modified_type_p (TREE_TYPE (type
), fn
))
8321 case FIXED_POINT_TYPE
:
8324 /* Scalar types are variably modified if their end points
8326 RETURN_TRUE_IF_VAR (TYPE_MIN_VALUE (type
));
8327 RETURN_TRUE_IF_VAR (TYPE_MAX_VALUE (type
));
8332 case QUAL_UNION_TYPE
:
8333 /* We can't see if any of the fields are variably-modified by the
8334 definition we normally use, since that would produce infinite
8335 recursion via pointers. */
8336 /* This is variably modified if some field's type is. */
8337 for (t
= TYPE_FIELDS (type
); t
; t
= DECL_CHAIN (t
))
8338 if (TREE_CODE (t
) == FIELD_DECL
)
8340 RETURN_TRUE_IF_VAR (DECL_FIELD_OFFSET (t
));
8341 RETURN_TRUE_IF_VAR (DECL_SIZE (t
));
8342 RETURN_TRUE_IF_VAR (DECL_SIZE_UNIT (t
));
8344 if (TREE_CODE (type
) == QUAL_UNION_TYPE
)
8345 RETURN_TRUE_IF_VAR (DECL_QUALIFIER (t
));
8350 /* Do not call ourselves to avoid infinite recursion. This is
8351 variably modified if the element type is. */
8352 RETURN_TRUE_IF_VAR (TYPE_SIZE (TREE_TYPE (type
)));
8353 RETURN_TRUE_IF_VAR (TYPE_SIZE_UNIT (TREE_TYPE (type
)));
8360 /* The current language may have other cases to check, but in general,
8361 all other types are not variably modified. */
8362 return lang_hooks
.tree_inlining
.var_mod_type_p (type
, fn
);
8364 #undef RETURN_TRUE_IF_VAR
8367 /* Given a DECL or TYPE, return the scope in which it was declared, or
8368 NULL_TREE if there is no containing scope. */
8371 get_containing_scope (const_tree t
)
8373 return (TYPE_P (t
) ? TYPE_CONTEXT (t
) : DECL_CONTEXT (t
));
8376 /* Return the innermost context enclosing DECL that is
8377 a FUNCTION_DECL, or zero if none. */
8380 decl_function_context (const_tree decl
)
8384 if (TREE_CODE (decl
) == ERROR_MARK
)
8387 /* C++ virtual functions use DECL_CONTEXT for the class of the vtable
8388 where we look up the function at runtime. Such functions always take
8389 a first argument of type 'pointer to real context'.
8391 C++ should really be fixed to use DECL_CONTEXT for the real context,
8392 and use something else for the "virtual context". */
8393 else if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_VINDEX (decl
))
8396 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl
)))));
8398 context
= DECL_CONTEXT (decl
);
8400 while (context
&& TREE_CODE (context
) != FUNCTION_DECL
)
8402 if (TREE_CODE (context
) == BLOCK
)
8403 context
= BLOCK_SUPERCONTEXT (context
);
8405 context
= get_containing_scope (context
);
8411 /* Return the innermost context enclosing DECL that is
8412 a RECORD_TYPE, UNION_TYPE or QUAL_UNION_TYPE, or zero if none.
8413 TYPE_DECLs and FUNCTION_DECLs are transparent to this function. */
8416 decl_type_context (const_tree decl
)
8418 tree context
= DECL_CONTEXT (decl
);
8421 switch (TREE_CODE (context
))
8423 case NAMESPACE_DECL
:
8424 case TRANSLATION_UNIT_DECL
:
8429 case QUAL_UNION_TYPE
:
8434 context
= DECL_CONTEXT (context
);
8438 context
= BLOCK_SUPERCONTEXT (context
);
8448 /* CALL is a CALL_EXPR. Return the declaration for the function
8449 called, or NULL_TREE if the called function cannot be
8453 get_callee_fndecl (const_tree call
)
8457 if (call
== error_mark_node
)
8458 return error_mark_node
;
8460 /* It's invalid to call this function with anything but a
8462 gcc_assert (TREE_CODE (call
) == CALL_EXPR
);
8464 /* The first operand to the CALL is the address of the function
8466 addr
= CALL_EXPR_FN (call
);
8470 /* If this is a readonly function pointer, extract its initial value. */
8471 if (DECL_P (addr
) && TREE_CODE (addr
) != FUNCTION_DECL
8472 && TREE_READONLY (addr
) && ! TREE_THIS_VOLATILE (addr
)
8473 && DECL_INITIAL (addr
))
8474 addr
= DECL_INITIAL (addr
);
8476 /* If the address is just `&f' for some function `f', then we know
8477 that `f' is being called. */
8478 if (TREE_CODE (addr
) == ADDR_EXPR
8479 && TREE_CODE (TREE_OPERAND (addr
, 0)) == FUNCTION_DECL
)
8480 return TREE_OPERAND (addr
, 0);
8482 /* We couldn't figure out what was being called. */
8486 /* Print debugging information about tree nodes generated during the compile,
8487 and any language-specific information. */
8490 dump_tree_statistics (void)
8492 #ifdef GATHER_STATISTICS
8494 int total_nodes
, total_bytes
;
8497 fprintf (stderr
, "\n??? tree nodes created\n\n");
8498 #ifdef GATHER_STATISTICS
8499 fprintf (stderr
, "Kind Nodes Bytes\n");
8500 fprintf (stderr
, "---------------------------------------\n");
8501 total_nodes
= total_bytes
= 0;
8502 for (i
= 0; i
< (int) all_kinds
; i
++)
8504 fprintf (stderr
, "%-20s %7d %10d\n", tree_node_kind_names
[i
],
8505 tree_node_counts
[i
], tree_node_sizes
[i
]);
8506 total_nodes
+= tree_node_counts
[i
];
8507 total_bytes
+= tree_node_sizes
[i
];
8509 fprintf (stderr
, "---------------------------------------\n");
8510 fprintf (stderr
, "%-20s %7d %10d\n", "Total", total_nodes
, total_bytes
);
8511 fprintf (stderr
, "---------------------------------------\n");
8512 fprintf (stderr
, "Code Nodes\n");
8513 fprintf (stderr
, "----------------------------\n");
8514 for (i
= 0; i
< (int) MAX_TREE_CODES
; i
++)
8515 fprintf (stderr
, "%-20s %7d\n", tree_code_name
[i
], tree_code_counts
[i
]);
8516 fprintf (stderr
, "----------------------------\n");
8517 ssanames_print_statistics ();
8518 phinodes_print_statistics ();
8520 fprintf (stderr
, "(No per-node statistics)\n");
8522 print_type_hash_statistics ();
8523 print_debug_expr_statistics ();
8524 print_value_expr_statistics ();
8525 lang_hooks
.print_statistics ();
8528 #define FILE_FUNCTION_FORMAT "_GLOBAL__%s_%s"
8530 /* Generate a crc32 of a byte. */
8533 crc32_byte (unsigned chksum
, char byte
)
8535 unsigned value
= (unsigned) byte
<< 24;
8538 for (ix
= 8; ix
--; value
<<= 1)
8542 feedback
= (value
^ chksum
) & 0x80000000 ? 0x04c11db7 : 0;
8550 /* Generate a crc32 of a string. */
8553 crc32_string (unsigned chksum
, const char *string
)
8557 chksum
= crc32_byte (chksum
, *string
);
8563 /* P is a string that will be used in a symbol. Mask out any characters
8564 that are not valid in that context. */
8567 clean_symbol_name (char *p
)
8571 #ifndef NO_DOLLAR_IN_LABEL /* this for `$'; unlikely, but... -- kr */
8574 #ifndef NO_DOT_IN_LABEL /* this for `.'; unlikely, but... */
8581 /* Generate a name for a special-purpose function.
8582 The generated name may need to be unique across the whole link.
8583 Changes to this function may also require corresponding changes to
8584 xstrdup_mask_random.
8585 TYPE is some string to identify the purpose of this function to the
8586 linker or collect2; it must start with an uppercase letter,
8588 I - for constructors
8590 N - for C++ anonymous namespaces
8591 F - for DWARF unwind frame information. */
8594 get_file_function_name (const char *type
)
8600 /* If we already have a name we know to be unique, just use that. */
8601 if (first_global_object_name
)
8602 p
= q
= ASTRDUP (first_global_object_name
);
8603 /* If the target is handling the constructors/destructors, they
8604 will be local to this file and the name is only necessary for
8606 We also assign sub_I and sub_D sufixes to constructors called from
8607 the global static constructors. These are always local. */
8608 else if (((type
[0] == 'I' || type
[0] == 'D') && targetm
.have_ctors_dtors
)
8609 || (strncmp (type
, "sub_", 4) == 0
8610 && (type
[4] == 'I' || type
[4] == 'D')))
8612 const char *file
= main_input_filename
;
8614 file
= input_filename
;
8615 /* Just use the file's basename, because the full pathname
8616 might be quite long. */
8617 p
= q
= ASTRDUP (lbasename (file
));
8621 /* Otherwise, the name must be unique across the entire link.
8622 We don't have anything that we know to be unique to this translation
8623 unit, so use what we do have and throw in some randomness. */
8625 const char *name
= weak_global_object_name
;
8626 const char *file
= main_input_filename
;
8631 file
= input_filename
;
8633 len
= strlen (file
);
8634 q
= (char *) alloca (9 * 2 + len
+ 1);
8635 memcpy (q
, file
, len
+ 1);
8637 sprintf (q
+ len
, "_%08X_%08X", crc32_string (0, name
),
8638 crc32_string (0, get_random_seed (false)));
8643 clean_symbol_name (q
);
8644 buf
= (char *) alloca (sizeof (FILE_FUNCTION_FORMAT
) + strlen (p
)
8647 /* Set up the name of the file-level functions we may need.
8648 Use a global object (which is already required to be unique over
8649 the program) rather than the file name (which imposes extra
8651 sprintf (buf
, FILE_FUNCTION_FORMAT
, type
, p
);
8653 return get_identifier (buf
);
8656 #if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007)
8658 /* Complain that the tree code of NODE does not match the expected 0
8659 terminated list of trailing codes. The trailing code list can be
8660 empty, for a more vague error message. FILE, LINE, and FUNCTION
8661 are of the caller. */
8664 tree_check_failed (const_tree node
, const char *file
,
8665 int line
, const char *function
, ...)
8669 unsigned length
= 0;
8672 va_start (args
, function
);
8673 while ((code
= va_arg (args
, int)))
8674 length
+= 4 + strlen (tree_code_name
[code
]);
8679 va_start (args
, function
);
8680 length
+= strlen ("expected ");
8681 buffer
= tmp
= (char *) alloca (length
);
8683 while ((code
= va_arg (args
, int)))
8685 const char *prefix
= length
? " or " : "expected ";
8687 strcpy (tmp
+ length
, prefix
);
8688 length
+= strlen (prefix
);
8689 strcpy (tmp
+ length
, tree_code_name
[code
]);
8690 length
+= strlen (tree_code_name
[code
]);
8695 buffer
= "unexpected node";
8697 internal_error ("tree check: %s, have %s in %s, at %s:%d",
8698 buffer
, tree_code_name
[TREE_CODE (node
)],
8699 function
, trim_filename (file
), line
);
8702 /* Complain that the tree code of NODE does match the expected 0
8703 terminated list of trailing codes. FILE, LINE, and FUNCTION are of
8707 tree_not_check_failed (const_tree node
, const char *file
,
8708 int line
, const char *function
, ...)
8712 unsigned length
= 0;
8715 va_start (args
, function
);
8716 while ((code
= va_arg (args
, int)))
8717 length
+= 4 + strlen (tree_code_name
[code
]);
8719 va_start (args
, function
);
8720 buffer
= (char *) alloca (length
);
8722 while ((code
= va_arg (args
, int)))
8726 strcpy (buffer
+ length
, " or ");
8729 strcpy (buffer
+ length
, tree_code_name
[code
]);
8730 length
+= strlen (tree_code_name
[code
]);
8734 internal_error ("tree check: expected none of %s, have %s in %s, at %s:%d",
8735 buffer
, tree_code_name
[TREE_CODE (node
)],
8736 function
, trim_filename (file
), line
);
8739 /* Similar to tree_check_failed, except that we check for a class of tree
8740 code, given in CL. */
8743 tree_class_check_failed (const_tree node
, const enum tree_code_class cl
,
8744 const char *file
, int line
, const char *function
)
8747 ("tree check: expected class %qs, have %qs (%s) in %s, at %s:%d",
8748 TREE_CODE_CLASS_STRING (cl
),
8749 TREE_CODE_CLASS_STRING (TREE_CODE_CLASS (TREE_CODE (node
))),
8750 tree_code_name
[TREE_CODE (node
)], function
, trim_filename (file
), line
);
8753 /* Similar to tree_check_failed, except that instead of specifying a
8754 dozen codes, use the knowledge that they're all sequential. */
8757 tree_range_check_failed (const_tree node
, const char *file
, int line
,
8758 const char *function
, enum tree_code c1
,
8762 unsigned length
= 0;
8765 for (c
= c1
; c
<= c2
; ++c
)
8766 length
+= 4 + strlen (tree_code_name
[c
]);
8768 length
+= strlen ("expected ");
8769 buffer
= (char *) alloca (length
);
8772 for (c
= c1
; c
<= c2
; ++c
)
8774 const char *prefix
= length
? " or " : "expected ";
8776 strcpy (buffer
+ length
, prefix
);
8777 length
+= strlen (prefix
);
8778 strcpy (buffer
+ length
, tree_code_name
[c
]);
8779 length
+= strlen (tree_code_name
[c
]);
8782 internal_error ("tree check: %s, have %s in %s, at %s:%d",
8783 buffer
, tree_code_name
[TREE_CODE (node
)],
8784 function
, trim_filename (file
), line
);
8788 /* Similar to tree_check_failed, except that we check that a tree does
8789 not have the specified code, given in CL. */
8792 tree_not_class_check_failed (const_tree node
, const enum tree_code_class cl
,
8793 const char *file
, int line
, const char *function
)
8796 ("tree check: did not expect class %qs, have %qs (%s) in %s, at %s:%d",
8797 TREE_CODE_CLASS_STRING (cl
),
8798 TREE_CODE_CLASS_STRING (TREE_CODE_CLASS (TREE_CODE (node
))),
8799 tree_code_name
[TREE_CODE (node
)], function
, trim_filename (file
), line
);
8803 /* Similar to tree_check_failed but applied to OMP_CLAUSE codes. */
8806 omp_clause_check_failed (const_tree node
, const char *file
, int line
,
8807 const char *function
, enum omp_clause_code code
)
8809 internal_error ("tree check: expected omp_clause %s, have %s in %s, at %s:%d",
8810 omp_clause_code_name
[code
], tree_code_name
[TREE_CODE (node
)],
8811 function
, trim_filename (file
), line
);
8815 /* Similar to tree_range_check_failed but applied to OMP_CLAUSE codes. */
8818 omp_clause_range_check_failed (const_tree node
, const char *file
, int line
,
8819 const char *function
, enum omp_clause_code c1
,
8820 enum omp_clause_code c2
)
8823 unsigned length
= 0;
8826 for (c
= c1
; c
<= c2
; ++c
)
8827 length
+= 4 + strlen (omp_clause_code_name
[c
]);
8829 length
+= strlen ("expected ");
8830 buffer
= (char *) alloca (length
);
8833 for (c
= c1
; c
<= c2
; ++c
)
8835 const char *prefix
= length
? " or " : "expected ";
8837 strcpy (buffer
+ length
, prefix
);
8838 length
+= strlen (prefix
);
8839 strcpy (buffer
+ length
, omp_clause_code_name
[c
]);
8840 length
+= strlen (omp_clause_code_name
[c
]);
8843 internal_error ("tree check: %s, have %s in %s, at %s:%d",
8844 buffer
, omp_clause_code_name
[TREE_CODE (node
)],
8845 function
, trim_filename (file
), line
);
8849 #undef DEFTREESTRUCT
8850 #define DEFTREESTRUCT(VAL, NAME) NAME,
8852 static const char *ts_enum_names
[] = {
8853 #include "treestruct.def"
8855 #undef DEFTREESTRUCT
8857 #define TS_ENUM_NAME(EN) (ts_enum_names[(EN)])
8859 /* Similar to tree_class_check_failed, except that we check for
8860 whether CODE contains the tree structure identified by EN. */
8863 tree_contains_struct_check_failed (const_tree node
,
8864 const enum tree_node_structure_enum en
,
8865 const char *file
, int line
,
8866 const char *function
)
8869 ("tree check: expected tree that contains %qs structure, have %qs in %s, at %s:%d",
8871 tree_code_name
[TREE_CODE (node
)], function
, trim_filename (file
), line
);
8875 /* Similar to above, except that the check is for the bounds of a TREE_VEC's
8876 (dynamically sized) vector. */
8879 tree_vec_elt_check_failed (int idx
, int len
, const char *file
, int line
,
8880 const char *function
)
8883 ("tree check: accessed elt %d of tree_vec with %d elts in %s, at %s:%d",
8884 idx
+ 1, len
, function
, trim_filename (file
), line
);
8887 /* Similar to above, except that the check is for the bounds of the operand
8888 vector of an expression node EXP. */
8891 tree_operand_check_failed (int idx
, const_tree exp
, const char *file
,
8892 int line
, const char *function
)
8894 int code
= TREE_CODE (exp
);
8896 ("tree check: accessed operand %d of %s with %d operands in %s, at %s:%d",
8897 idx
+ 1, tree_code_name
[code
], TREE_OPERAND_LENGTH (exp
),
8898 function
, trim_filename (file
), line
);
8901 /* Similar to above, except that the check is for the number of
8902 operands of an OMP_CLAUSE node. */
8905 omp_clause_operand_check_failed (int idx
, const_tree t
, const char *file
,
8906 int line
, const char *function
)
8909 ("tree check: accessed operand %d of omp_clause %s with %d operands "
8910 "in %s, at %s:%d", idx
+ 1, omp_clause_code_name
[OMP_CLAUSE_CODE (t
)],
8911 omp_clause_num_ops
[OMP_CLAUSE_CODE (t
)], function
,
8912 trim_filename (file
), line
);
8914 #endif /* ENABLE_TREE_CHECKING */
8916 /* Create a new vector type node holding SUBPARTS units of type INNERTYPE,
8917 and mapped to the machine mode MODE. Initialize its fields and build
8918 the information necessary for debugging output. */
8921 make_vector_type (tree innertype
, int nunits
, enum machine_mode mode
)
8924 hashval_t hashcode
= 0;
8926 t
= make_node (VECTOR_TYPE
);
8927 TREE_TYPE (t
) = TYPE_MAIN_VARIANT (innertype
);
8928 SET_TYPE_VECTOR_SUBPARTS (t
, nunits
);
8929 SET_TYPE_MODE (t
, mode
);
8931 if (TYPE_STRUCTURAL_EQUALITY_P (innertype
))
8932 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8933 else if (TYPE_CANONICAL (innertype
) != innertype
8934 || mode
!= VOIDmode
)
8936 = make_vector_type (TYPE_CANONICAL (innertype
), nunits
, VOIDmode
);
8940 hashcode
= iterative_hash_host_wide_int (VECTOR_TYPE
, hashcode
);
8941 hashcode
= iterative_hash_host_wide_int (nunits
, hashcode
);
8942 hashcode
= iterative_hash_host_wide_int (mode
, hashcode
);
8943 hashcode
= iterative_hash_object (TYPE_HASH (TREE_TYPE (t
)), hashcode
);
8944 t
= type_hash_canon (hashcode
, t
);
8946 /* We have built a main variant, based on the main variant of the
8947 inner type. Use it to build the variant we return. */
8948 if ((TYPE_ATTRIBUTES (innertype
) || TYPE_QUALS (innertype
))
8949 && TREE_TYPE (t
) != innertype
)
8950 return build_type_attribute_qual_variant (t
,
8951 TYPE_ATTRIBUTES (innertype
),
8952 TYPE_QUALS (innertype
));
8958 make_or_reuse_type (unsigned size
, int unsignedp
)
8960 if (size
== INT_TYPE_SIZE
)
8961 return unsignedp
? unsigned_type_node
: integer_type_node
;
8962 if (size
== CHAR_TYPE_SIZE
)
8963 return unsignedp
? unsigned_char_type_node
: signed_char_type_node
;
8964 if (size
== SHORT_TYPE_SIZE
)
8965 return unsignedp
? short_unsigned_type_node
: short_integer_type_node
;
8966 if (size
== LONG_TYPE_SIZE
)
8967 return unsignedp
? long_unsigned_type_node
: long_integer_type_node
;
8968 if (size
== LONG_LONG_TYPE_SIZE
)
8969 return (unsignedp
? long_long_unsigned_type_node
8970 : long_long_integer_type_node
);
8971 if (size
== 128 && int128_integer_type_node
)
8972 return (unsignedp
? int128_unsigned_type_node
8973 : int128_integer_type_node
);
8976 return make_unsigned_type (size
);
8978 return make_signed_type (size
);
8981 /* Create or reuse a fract type by SIZE, UNSIGNEDP, and SATP. */
8984 make_or_reuse_fract_type (unsigned size
, int unsignedp
, int satp
)
8988 if (size
== SHORT_FRACT_TYPE_SIZE
)
8989 return unsignedp
? sat_unsigned_short_fract_type_node
8990 : sat_short_fract_type_node
;
8991 if (size
== FRACT_TYPE_SIZE
)
8992 return unsignedp
? sat_unsigned_fract_type_node
: sat_fract_type_node
;
8993 if (size
== LONG_FRACT_TYPE_SIZE
)
8994 return unsignedp
? sat_unsigned_long_fract_type_node
8995 : sat_long_fract_type_node
;
8996 if (size
== LONG_LONG_FRACT_TYPE_SIZE
)
8997 return unsignedp
? sat_unsigned_long_long_fract_type_node
8998 : sat_long_long_fract_type_node
;
9002 if (size
== SHORT_FRACT_TYPE_SIZE
)
9003 return unsignedp
? unsigned_short_fract_type_node
9004 : short_fract_type_node
;
9005 if (size
== FRACT_TYPE_SIZE
)
9006 return unsignedp
? unsigned_fract_type_node
: fract_type_node
;
9007 if (size
== LONG_FRACT_TYPE_SIZE
)
9008 return unsignedp
? unsigned_long_fract_type_node
9009 : long_fract_type_node
;
9010 if (size
== LONG_LONG_FRACT_TYPE_SIZE
)
9011 return unsignedp
? unsigned_long_long_fract_type_node
9012 : long_long_fract_type_node
;
9015 return make_fract_type (size
, unsignedp
, satp
);
9018 /* Create or reuse an accum type by SIZE, UNSIGNEDP, and SATP. */
9021 make_or_reuse_accum_type (unsigned size
, int unsignedp
, int satp
)
9025 if (size
== SHORT_ACCUM_TYPE_SIZE
)
9026 return unsignedp
? sat_unsigned_short_accum_type_node
9027 : sat_short_accum_type_node
;
9028 if (size
== ACCUM_TYPE_SIZE
)
9029 return unsignedp
? sat_unsigned_accum_type_node
: sat_accum_type_node
;
9030 if (size
== LONG_ACCUM_TYPE_SIZE
)
9031 return unsignedp
? sat_unsigned_long_accum_type_node
9032 : sat_long_accum_type_node
;
9033 if (size
== LONG_LONG_ACCUM_TYPE_SIZE
)
9034 return unsignedp
? sat_unsigned_long_long_accum_type_node
9035 : sat_long_long_accum_type_node
;
9039 if (size
== SHORT_ACCUM_TYPE_SIZE
)
9040 return unsignedp
? unsigned_short_accum_type_node
9041 : short_accum_type_node
;
9042 if (size
== ACCUM_TYPE_SIZE
)
9043 return unsignedp
? unsigned_accum_type_node
: accum_type_node
;
9044 if (size
== LONG_ACCUM_TYPE_SIZE
)
9045 return unsignedp
? unsigned_long_accum_type_node
9046 : long_accum_type_node
;
9047 if (size
== LONG_LONG_ACCUM_TYPE_SIZE
)
9048 return unsignedp
? unsigned_long_long_accum_type_node
9049 : long_long_accum_type_node
;
9052 return make_accum_type (size
, unsignedp
, satp
);
9055 /* Create nodes for all integer types (and error_mark_node) using the sizes
9056 of C datatypes. The caller should call set_sizetype soon after calling
9057 this function to select one of the types as sizetype. */
9060 build_common_tree_nodes (bool signed_char
)
9062 error_mark_node
= make_node (ERROR_MARK
);
9063 TREE_TYPE (error_mark_node
) = error_mark_node
;
9065 initialize_sizetypes ();
9067 /* Define both `signed char' and `unsigned char'. */
9068 signed_char_type_node
= make_signed_type (CHAR_TYPE_SIZE
);
9069 TYPE_STRING_FLAG (signed_char_type_node
) = 1;
9070 unsigned_char_type_node
= make_unsigned_type (CHAR_TYPE_SIZE
);
9071 TYPE_STRING_FLAG (unsigned_char_type_node
) = 1;
9073 /* Define `char', which is like either `signed char' or `unsigned char'
9074 but not the same as either. */
9077 ? make_signed_type (CHAR_TYPE_SIZE
)
9078 : make_unsigned_type (CHAR_TYPE_SIZE
));
9079 TYPE_STRING_FLAG (char_type_node
) = 1;
9081 short_integer_type_node
= make_signed_type (SHORT_TYPE_SIZE
);
9082 short_unsigned_type_node
= make_unsigned_type (SHORT_TYPE_SIZE
);
9083 integer_type_node
= make_signed_type (INT_TYPE_SIZE
);
9084 unsigned_type_node
= make_unsigned_type (INT_TYPE_SIZE
);
9085 long_integer_type_node
= make_signed_type (LONG_TYPE_SIZE
);
9086 long_unsigned_type_node
= make_unsigned_type (LONG_TYPE_SIZE
);
9087 long_long_integer_type_node
= make_signed_type (LONG_LONG_TYPE_SIZE
);
9088 long_long_unsigned_type_node
= make_unsigned_type (LONG_LONG_TYPE_SIZE
);
9089 #if HOST_BITS_PER_WIDE_INT >= 64
9090 /* TODO: This isn't correct, but as logic depends at the moment on
9091 host's instead of target's wide-integer.
9092 If there is a target not supporting TImode, but has an 128-bit
9093 integer-scalar register, this target check needs to be adjusted. */
9094 if (targetm
.scalar_mode_supported_p (TImode
))
9096 int128_integer_type_node
= make_signed_type (128);
9097 int128_unsigned_type_node
= make_unsigned_type (128);
9100 /* Define a boolean type. This type only represents boolean values but
9101 may be larger than char depending on the value of BOOL_TYPE_SIZE.
9102 Front ends which want to override this size (i.e. Java) can redefine
9103 boolean_type_node before calling build_common_tree_nodes_2. */
9104 boolean_type_node
= make_unsigned_type (BOOL_TYPE_SIZE
);
9105 TREE_SET_CODE (boolean_type_node
, BOOLEAN_TYPE
);
9106 TYPE_MAX_VALUE (boolean_type_node
) = build_int_cst (boolean_type_node
, 1);
9107 TYPE_PRECISION (boolean_type_node
) = 1;
9109 /* Fill in the rest of the sized types. Reuse existing type nodes
9111 intQI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (QImode
), 0);
9112 intHI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (HImode
), 0);
9113 intSI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (SImode
), 0);
9114 intDI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (DImode
), 0);
9115 intTI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (TImode
), 0);
9117 unsigned_intQI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (QImode
), 1);
9118 unsigned_intHI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (HImode
), 1);
9119 unsigned_intSI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (SImode
), 1);
9120 unsigned_intDI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (DImode
), 1);
9121 unsigned_intTI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (TImode
), 1);
9123 access_public_node
= get_identifier ("public");
9124 access_protected_node
= get_identifier ("protected");
9125 access_private_node
= get_identifier ("private");
9128 /* Call this function after calling build_common_tree_nodes and set_sizetype.
9129 It will create several other common tree nodes. */
9132 build_common_tree_nodes_2 (int short_double
)
9134 /* Define these next since types below may used them. */
9135 integer_zero_node
= build_int_cst (integer_type_node
, 0);
9136 integer_one_node
= build_int_cst (integer_type_node
, 1);
9137 integer_three_node
= build_int_cst (integer_type_node
, 3);
9138 integer_minus_one_node
= build_int_cst (integer_type_node
, -1);
9140 size_zero_node
= size_int (0);
9141 size_one_node
= size_int (1);
9142 bitsize_zero_node
= bitsize_int (0);
9143 bitsize_one_node
= bitsize_int (1);
9144 bitsize_unit_node
= bitsize_int (BITS_PER_UNIT
);
9146 boolean_false_node
= TYPE_MIN_VALUE (boolean_type_node
);
9147 boolean_true_node
= TYPE_MAX_VALUE (boolean_type_node
);
9149 void_type_node
= make_node (VOID_TYPE
);
9150 layout_type (void_type_node
);
9152 /* We are not going to have real types in C with less than byte alignment,
9153 so we might as well not have any types that claim to have it. */
9154 TYPE_ALIGN (void_type_node
) = BITS_PER_UNIT
;
9155 TYPE_USER_ALIGN (void_type_node
) = 0;
9157 null_pointer_node
= build_int_cst (build_pointer_type (void_type_node
), 0);
9158 layout_type (TREE_TYPE (null_pointer_node
));
9160 ptr_type_node
= build_pointer_type (void_type_node
);
9162 = build_pointer_type (build_type_variant (void_type_node
, 1, 0));
9163 fileptr_type_node
= ptr_type_node
;
9165 float_type_node
= make_node (REAL_TYPE
);
9166 TYPE_PRECISION (float_type_node
) = FLOAT_TYPE_SIZE
;
9167 layout_type (float_type_node
);
9169 double_type_node
= make_node (REAL_TYPE
);
9171 TYPE_PRECISION (double_type_node
) = FLOAT_TYPE_SIZE
;
9173 TYPE_PRECISION (double_type_node
) = DOUBLE_TYPE_SIZE
;
9174 layout_type (double_type_node
);
9176 long_double_type_node
= make_node (REAL_TYPE
);
9177 TYPE_PRECISION (long_double_type_node
) = LONG_DOUBLE_TYPE_SIZE
;
9178 layout_type (long_double_type_node
);
9180 float_ptr_type_node
= build_pointer_type (float_type_node
);
9181 double_ptr_type_node
= build_pointer_type (double_type_node
);
9182 long_double_ptr_type_node
= build_pointer_type (long_double_type_node
);
9183 integer_ptr_type_node
= build_pointer_type (integer_type_node
);
9185 /* Fixed size integer types. */
9186 uint32_type_node
= build_nonstandard_integer_type (32, true);
9187 uint64_type_node
= build_nonstandard_integer_type (64, true);
9189 /* Decimal float types. */
9190 dfloat32_type_node
= make_node (REAL_TYPE
);
9191 TYPE_PRECISION (dfloat32_type_node
) = DECIMAL32_TYPE_SIZE
;
9192 layout_type (dfloat32_type_node
);
9193 SET_TYPE_MODE (dfloat32_type_node
, SDmode
);
9194 dfloat32_ptr_type_node
= build_pointer_type (dfloat32_type_node
);
9196 dfloat64_type_node
= make_node (REAL_TYPE
);
9197 TYPE_PRECISION (dfloat64_type_node
) = DECIMAL64_TYPE_SIZE
;
9198 layout_type (dfloat64_type_node
);
9199 SET_TYPE_MODE (dfloat64_type_node
, DDmode
);
9200 dfloat64_ptr_type_node
= build_pointer_type (dfloat64_type_node
);
9202 dfloat128_type_node
= make_node (REAL_TYPE
);
9203 TYPE_PRECISION (dfloat128_type_node
) = DECIMAL128_TYPE_SIZE
;
9204 layout_type (dfloat128_type_node
);
9205 SET_TYPE_MODE (dfloat128_type_node
, TDmode
);
9206 dfloat128_ptr_type_node
= build_pointer_type (dfloat128_type_node
);
9208 complex_integer_type_node
= build_complex_type (integer_type_node
);
9209 complex_float_type_node
= build_complex_type (float_type_node
);
9210 complex_double_type_node
= build_complex_type (double_type_node
);
9211 complex_long_double_type_node
= build_complex_type (long_double_type_node
);
9213 /* Make fixed-point nodes based on sat/non-sat and signed/unsigned. */
9214 #define MAKE_FIXED_TYPE_NODE(KIND,SIZE) \
9215 sat_ ## KIND ## _type_node = \
9216 make_sat_signed_ ## KIND ## _type (SIZE); \
9217 sat_unsigned_ ## KIND ## _type_node = \
9218 make_sat_unsigned_ ## KIND ## _type (SIZE); \
9219 KIND ## _type_node = make_signed_ ## KIND ## _type (SIZE); \
9220 unsigned_ ## KIND ## _type_node = \
9221 make_unsigned_ ## KIND ## _type (SIZE);
9223 #define MAKE_FIXED_TYPE_NODE_WIDTH(KIND,WIDTH,SIZE) \
9224 sat_ ## WIDTH ## KIND ## _type_node = \
9225 make_sat_signed_ ## KIND ## _type (SIZE); \
9226 sat_unsigned_ ## WIDTH ## KIND ## _type_node = \
9227 make_sat_unsigned_ ## KIND ## _type (SIZE); \
9228 WIDTH ## KIND ## _type_node = make_signed_ ## KIND ## _type (SIZE); \
9229 unsigned_ ## WIDTH ## KIND ## _type_node = \
9230 make_unsigned_ ## KIND ## _type (SIZE);
9232 /* Make fixed-point type nodes based on four different widths. */
9233 #define MAKE_FIXED_TYPE_NODE_FAMILY(N1,N2) \
9234 MAKE_FIXED_TYPE_NODE_WIDTH (N1, short_, SHORT_ ## N2 ## _TYPE_SIZE) \
9235 MAKE_FIXED_TYPE_NODE (N1, N2 ## _TYPE_SIZE) \
9236 MAKE_FIXED_TYPE_NODE_WIDTH (N1, long_, LONG_ ## N2 ## _TYPE_SIZE) \
9237 MAKE_FIXED_TYPE_NODE_WIDTH (N1, long_long_, LONG_LONG_ ## N2 ## _TYPE_SIZE)
9239 /* Make fixed-point mode nodes based on sat/non-sat and signed/unsigned. */
9240 #define MAKE_FIXED_MODE_NODE(KIND,NAME,MODE) \
9241 NAME ## _type_node = \
9242 make_or_reuse_signed_ ## KIND ## _type (GET_MODE_BITSIZE (MODE ## mode)); \
9243 u ## NAME ## _type_node = \
9244 make_or_reuse_unsigned_ ## KIND ## _type \
9245 (GET_MODE_BITSIZE (U ## MODE ## mode)); \
9246 sat_ ## NAME ## _type_node = \
9247 make_or_reuse_sat_signed_ ## KIND ## _type \
9248 (GET_MODE_BITSIZE (MODE ## mode)); \
9249 sat_u ## NAME ## _type_node = \
9250 make_or_reuse_sat_unsigned_ ## KIND ## _type \
9251 (GET_MODE_BITSIZE (U ## MODE ## mode));
9253 /* Fixed-point type and mode nodes. */
9254 MAKE_FIXED_TYPE_NODE_FAMILY (fract
, FRACT
)
9255 MAKE_FIXED_TYPE_NODE_FAMILY (accum
, ACCUM
)
9256 MAKE_FIXED_MODE_NODE (fract
, qq
, QQ
)
9257 MAKE_FIXED_MODE_NODE (fract
, hq
, HQ
)
9258 MAKE_FIXED_MODE_NODE (fract
, sq
, SQ
)
9259 MAKE_FIXED_MODE_NODE (fract
, dq
, DQ
)
9260 MAKE_FIXED_MODE_NODE (fract
, tq
, TQ
)
9261 MAKE_FIXED_MODE_NODE (accum
, ha
, HA
)
9262 MAKE_FIXED_MODE_NODE (accum
, sa
, SA
)
9263 MAKE_FIXED_MODE_NODE (accum
, da
, DA
)
9264 MAKE_FIXED_MODE_NODE (accum
, ta
, TA
)
9267 tree t
= targetm
.build_builtin_va_list ();
9269 /* Many back-ends define record types without setting TYPE_NAME.
9270 If we copied the record type here, we'd keep the original
9271 record type without a name. This breaks name mangling. So,
9272 don't copy record types and let c_common_nodes_and_builtins()
9273 declare the type to be __builtin_va_list. */
9274 if (TREE_CODE (t
) != RECORD_TYPE
)
9275 t
= build_variant_type_copy (t
);
9277 va_list_type_node
= t
;
9281 /* A subroutine of build_common_builtin_nodes. Define a builtin function. */
9284 local_define_builtin (const char *name
, tree type
, enum built_in_function code
,
9285 const char *library_name
, int ecf_flags
)
9289 decl
= add_builtin_function (name
, type
, code
, BUILT_IN_NORMAL
,
9290 library_name
, NULL_TREE
);
9291 if (ecf_flags
& ECF_CONST
)
9292 TREE_READONLY (decl
) = 1;
9293 if (ecf_flags
& ECF_PURE
)
9294 DECL_PURE_P (decl
) = 1;
9295 if (ecf_flags
& ECF_LOOPING_CONST_OR_PURE
)
9296 DECL_LOOPING_CONST_OR_PURE_P (decl
) = 1;
9297 if (ecf_flags
& ECF_NORETURN
)
9298 TREE_THIS_VOLATILE (decl
) = 1;
9299 if (ecf_flags
& ECF_NOTHROW
)
9300 TREE_NOTHROW (decl
) = 1;
9301 if (ecf_flags
& ECF_MALLOC
)
9302 DECL_IS_MALLOC (decl
) = 1;
9303 if (ecf_flags
& ECF_LEAF
)
9304 DECL_ATTRIBUTES (decl
) = tree_cons (get_identifier ("leaf"),
9305 NULL
, DECL_ATTRIBUTES (decl
));
9307 built_in_decls
[code
] = decl
;
9308 implicit_built_in_decls
[code
] = decl
;
9311 /* Call this function after instantiating all builtins that the language
9312 front end cares about. This will build the rest of the builtins that
9313 are relied upon by the tree optimizers and the middle-end. */
9316 build_common_builtin_nodes (void)
9320 if (built_in_decls
[BUILT_IN_MEMCPY
] == NULL
9321 || built_in_decls
[BUILT_IN_MEMMOVE
] == NULL
)
9323 ftype
= build_function_type_list (ptr_type_node
,
9324 ptr_type_node
, const_ptr_type_node
,
9325 size_type_node
, NULL_TREE
);
9327 if (built_in_decls
[BUILT_IN_MEMCPY
] == NULL
)
9328 local_define_builtin ("__builtin_memcpy", ftype
, BUILT_IN_MEMCPY
,
9329 "memcpy", ECF_NOTHROW
| ECF_LEAF
);
9330 if (built_in_decls
[BUILT_IN_MEMMOVE
] == NULL
)
9331 local_define_builtin ("__builtin_memmove", ftype
, BUILT_IN_MEMMOVE
,
9332 "memmove", ECF_NOTHROW
| ECF_LEAF
);
9335 if (built_in_decls
[BUILT_IN_MEMCMP
] == NULL
)
9337 ftype
= build_function_type_list (integer_type_node
, const_ptr_type_node
,
9338 const_ptr_type_node
, size_type_node
,
9340 local_define_builtin ("__builtin_memcmp", ftype
, BUILT_IN_MEMCMP
,
9341 "memcmp", ECF_PURE
| ECF_NOTHROW
| ECF_LEAF
);
9344 if (built_in_decls
[BUILT_IN_MEMSET
] == NULL
)
9346 ftype
= build_function_type_list (ptr_type_node
,
9347 ptr_type_node
, integer_type_node
,
9348 size_type_node
, NULL_TREE
);
9349 local_define_builtin ("__builtin_memset", ftype
, BUILT_IN_MEMSET
,
9350 "memset", ECF_NOTHROW
| ECF_LEAF
);
9353 if (built_in_decls
[BUILT_IN_ALLOCA
] == NULL
)
9355 ftype
= build_function_type_list (ptr_type_node
,
9356 size_type_node
, NULL_TREE
);
9357 local_define_builtin ("__builtin_alloca", ftype
, BUILT_IN_ALLOCA
,
9358 "alloca", ECF_MALLOC
| ECF_NOTHROW
| ECF_LEAF
);
9361 /* If we're checking the stack, `alloca' can throw. */
9362 if (flag_stack_check
)
9363 TREE_NOTHROW (built_in_decls
[BUILT_IN_ALLOCA
]) = 0;
9365 ftype
= build_function_type_list (void_type_node
,
9366 ptr_type_node
, ptr_type_node
,
9367 ptr_type_node
, NULL_TREE
);
9368 local_define_builtin ("__builtin_init_trampoline", ftype
,
9369 BUILT_IN_INIT_TRAMPOLINE
,
9370 "__builtin_init_trampoline", ECF_NOTHROW
| ECF_LEAF
);
9372 ftype
= build_function_type_list (ptr_type_node
, ptr_type_node
, NULL_TREE
);
9373 local_define_builtin ("__builtin_adjust_trampoline", ftype
,
9374 BUILT_IN_ADJUST_TRAMPOLINE
,
9375 "__builtin_adjust_trampoline",
9376 ECF_CONST
| ECF_NOTHROW
);
9378 ftype
= build_function_type_list (void_type_node
,
9379 ptr_type_node
, ptr_type_node
, NULL_TREE
);
9380 local_define_builtin ("__builtin_nonlocal_goto", ftype
,
9381 BUILT_IN_NONLOCAL_GOTO
,
9382 "__builtin_nonlocal_goto",
9383 ECF_NORETURN
| ECF_NOTHROW
);
9385 ftype
= build_function_type_list (void_type_node
,
9386 ptr_type_node
, ptr_type_node
, NULL_TREE
);
9387 local_define_builtin ("__builtin_setjmp_setup", ftype
,
9388 BUILT_IN_SETJMP_SETUP
,
9389 "__builtin_setjmp_setup", ECF_NOTHROW
);
9391 ftype
= build_function_type_list (ptr_type_node
, ptr_type_node
, NULL_TREE
);
9392 local_define_builtin ("__builtin_setjmp_dispatcher", ftype
,
9393 BUILT_IN_SETJMP_DISPATCHER
,
9394 "__builtin_setjmp_dispatcher",
9395 ECF_PURE
| ECF_NOTHROW
);
9397 ftype
= build_function_type_list (void_type_node
, ptr_type_node
, NULL_TREE
);
9398 local_define_builtin ("__builtin_setjmp_receiver", ftype
,
9399 BUILT_IN_SETJMP_RECEIVER
,
9400 "__builtin_setjmp_receiver", ECF_NOTHROW
);
9402 ftype
= build_function_type_list (ptr_type_node
, NULL_TREE
);
9403 local_define_builtin ("__builtin_stack_save", ftype
, BUILT_IN_STACK_SAVE
,
9404 "__builtin_stack_save", ECF_NOTHROW
| ECF_LEAF
);
9406 ftype
= build_function_type_list (void_type_node
, ptr_type_node
, NULL_TREE
);
9407 local_define_builtin ("__builtin_stack_restore", ftype
,
9408 BUILT_IN_STACK_RESTORE
,
9409 "__builtin_stack_restore", ECF_NOTHROW
| ECF_LEAF
);
9411 /* If there's a possibility that we might use the ARM EABI, build the
9412 alternate __cxa_end_cleanup node used to resume from C++ and Java. */
9413 if (targetm
.arm_eabi_unwinder
)
9415 ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
9416 local_define_builtin ("__builtin_cxa_end_cleanup", ftype
,
9417 BUILT_IN_CXA_END_CLEANUP
,
9418 "__cxa_end_cleanup", ECF_NORETURN
| ECF_LEAF
);
9421 ftype
= build_function_type_list (void_type_node
, ptr_type_node
, NULL_TREE
);
9422 local_define_builtin ("__builtin_unwind_resume", ftype
,
9423 BUILT_IN_UNWIND_RESUME
,
9424 ((targetm
.except_unwind_info (&global_options
)
9426 ? "_Unwind_SjLj_Resume" : "_Unwind_Resume"),
9429 /* The exception object and filter values from the runtime. The argument
9430 must be zero before exception lowering, i.e. from the front end. After
9431 exception lowering, it will be the region number for the exception
9432 landing pad. These functions are PURE instead of CONST to prevent
9433 them from being hoisted past the exception edge that will initialize
9434 its value in the landing pad. */
9435 ftype
= build_function_type_list (ptr_type_node
,
9436 integer_type_node
, NULL_TREE
);
9437 local_define_builtin ("__builtin_eh_pointer", ftype
, BUILT_IN_EH_POINTER
,
9438 "__builtin_eh_pointer", ECF_PURE
| ECF_NOTHROW
| ECF_LEAF
);
9440 tmp
= lang_hooks
.types
.type_for_mode (targetm
.eh_return_filter_mode (), 0);
9441 ftype
= build_function_type_list (tmp
, integer_type_node
, NULL_TREE
);
9442 local_define_builtin ("__builtin_eh_filter", ftype
, BUILT_IN_EH_FILTER
,
9443 "__builtin_eh_filter", ECF_PURE
| ECF_NOTHROW
| ECF_LEAF
);
9445 ftype
= build_function_type_list (void_type_node
,
9446 integer_type_node
, integer_type_node
,
9448 local_define_builtin ("__builtin_eh_copy_values", ftype
,
9449 BUILT_IN_EH_COPY_VALUES
,
9450 "__builtin_eh_copy_values", ECF_NOTHROW
);
9452 /* Complex multiplication and division. These are handled as builtins
9453 rather than optabs because emit_library_call_value doesn't support
9454 complex. Further, we can do slightly better with folding these
9455 beasties if the real and complex parts of the arguments are separate. */
9459 for (mode
= MIN_MODE_COMPLEX_FLOAT
; mode
<= MAX_MODE_COMPLEX_FLOAT
; ++mode
)
9461 char mode_name_buf
[4], *q
;
9463 enum built_in_function mcode
, dcode
;
9464 tree type
, inner_type
;
9466 type
= lang_hooks
.types
.type_for_mode ((enum machine_mode
) mode
, 0);
9469 inner_type
= TREE_TYPE (type
);
9471 ftype
= build_function_type_list (type
, inner_type
, inner_type
,
9472 inner_type
, inner_type
, NULL_TREE
);
9474 mcode
= ((enum built_in_function
)
9475 (BUILT_IN_COMPLEX_MUL_MIN
+ mode
- MIN_MODE_COMPLEX_FLOAT
));
9476 dcode
= ((enum built_in_function
)
9477 (BUILT_IN_COMPLEX_DIV_MIN
+ mode
- MIN_MODE_COMPLEX_FLOAT
));
9479 for (p
= GET_MODE_NAME (mode
), q
= mode_name_buf
; *p
; p
++, q
++)
9483 built_in_names
[mcode
] = concat ("__mul", mode_name_buf
, "3", NULL
);
9484 local_define_builtin (built_in_names
[mcode
], ftype
, mcode
,
9485 built_in_names
[mcode
], ECF_CONST
| ECF_NOTHROW
| ECF_LEAF
);
9487 built_in_names
[dcode
] = concat ("__div", mode_name_buf
, "3", NULL
);
9488 local_define_builtin (built_in_names
[dcode
], ftype
, dcode
,
9489 built_in_names
[dcode
], ECF_CONST
| ECF_NOTHROW
| ECF_LEAF
);
9494 /* HACK. GROSS. This is absolutely disgusting. I wish there was a
9497 If we requested a pointer to a vector, build up the pointers that
9498 we stripped off while looking for the inner type. Similarly for
9499 return values from functions.
9501 The argument TYPE is the top of the chain, and BOTTOM is the
9502 new type which we will point to. */
9505 reconstruct_complex_type (tree type
, tree bottom
)
9509 if (TREE_CODE (type
) == POINTER_TYPE
)
9511 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
9512 outer
= build_pointer_type_for_mode (inner
, TYPE_MODE (type
),
9513 TYPE_REF_CAN_ALIAS_ALL (type
));
9515 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9517 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
9518 outer
= build_reference_type_for_mode (inner
, TYPE_MODE (type
),
9519 TYPE_REF_CAN_ALIAS_ALL (type
));
9521 else if (TREE_CODE (type
) == ARRAY_TYPE
)
9523 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
9524 outer
= build_array_type (inner
, TYPE_DOMAIN (type
));
9526 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9528 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
9529 outer
= build_function_type (inner
, TYPE_ARG_TYPES (type
));
9531 else if (TREE_CODE (type
) == METHOD_TYPE
)
9533 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
9534 /* The build_method_type_directly() routine prepends 'this' to argument list,
9535 so we must compensate by getting rid of it. */
9537 = build_method_type_directly
9538 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (type
))),
9540 TREE_CHAIN (TYPE_ARG_TYPES (type
)));
9542 else if (TREE_CODE (type
) == OFFSET_TYPE
)
9544 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
9545 outer
= build_offset_type (TYPE_OFFSET_BASETYPE (type
), inner
);
9550 return build_type_attribute_qual_variant (outer
, TYPE_ATTRIBUTES (type
),
9554 /* Returns a vector tree node given a mode (integer, vector, or BLKmode) and
9557 build_vector_type_for_mode (tree innertype
, enum machine_mode mode
)
9561 switch (GET_MODE_CLASS (mode
))
9563 case MODE_VECTOR_INT
:
9564 case MODE_VECTOR_FLOAT
:
9565 case MODE_VECTOR_FRACT
:
9566 case MODE_VECTOR_UFRACT
:
9567 case MODE_VECTOR_ACCUM
:
9568 case MODE_VECTOR_UACCUM
:
9569 nunits
= GET_MODE_NUNITS (mode
);
9573 /* Check that there are no leftover bits. */
9574 gcc_assert (GET_MODE_BITSIZE (mode
)
9575 % TREE_INT_CST_LOW (TYPE_SIZE (innertype
)) == 0);
9577 nunits
= GET_MODE_BITSIZE (mode
)
9578 / TREE_INT_CST_LOW (TYPE_SIZE (innertype
));
9585 return make_vector_type (innertype
, nunits
, mode
);
9588 /* Similarly, but takes the inner type and number of units, which must be
9592 build_vector_type (tree innertype
, int nunits
)
9594 return make_vector_type (innertype
, nunits
, VOIDmode
);
9597 /* Similarly, but takes the inner type and number of units, which must be
9601 build_opaque_vector_type (tree innertype
, int nunits
)
9604 innertype
= build_distinct_type_copy (innertype
);
9605 t
= make_vector_type (innertype
, nunits
, VOIDmode
);
9606 TYPE_VECTOR_OPAQUE (t
) = true;
9611 /* Given an initializer INIT, return TRUE if INIT is zero or some
9612 aggregate of zeros. Otherwise return FALSE. */
9614 initializer_zerop (const_tree init
)
9620 switch (TREE_CODE (init
))
9623 return integer_zerop (init
);
9626 /* ??? Note that this is not correct for C4X float formats. There,
9627 a bit pattern of all zeros is 1.0; 0.0 is encoded with the most
9628 negative exponent. */
9629 return real_zerop (init
)
9630 && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (init
));
9633 return fixed_zerop (init
);
9636 return integer_zerop (init
)
9637 || (real_zerop (init
)
9638 && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (TREE_REALPART (init
)))
9639 && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (TREE_IMAGPART (init
))));
9642 for (elt
= TREE_VECTOR_CST_ELTS (init
); elt
; elt
= TREE_CHAIN (elt
))
9643 if (!initializer_zerop (TREE_VALUE (elt
)))
9649 unsigned HOST_WIDE_INT idx
;
9651 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (init
), idx
, elt
)
9652 if (!initializer_zerop (elt
))
9661 /* We need to loop through all elements to handle cases like
9662 "\0" and "\0foobar". */
9663 for (i
= 0; i
< TREE_STRING_LENGTH (init
); ++i
)
9664 if (TREE_STRING_POINTER (init
)[i
] != '\0')
9675 /* Build an empty statement at location LOC. */
9678 build_empty_stmt (location_t loc
)
9680 tree t
= build1 (NOP_EXPR
, void_type_node
, size_zero_node
);
9681 SET_EXPR_LOCATION (t
, loc
);
9686 /* Build an OpenMP clause with code CODE. LOC is the location of the
9690 build_omp_clause (location_t loc
, enum omp_clause_code code
)
9695 length
= omp_clause_num_ops
[code
];
9696 size
= (sizeof (struct tree_omp_clause
) + (length
- 1) * sizeof (tree
));
9698 record_node_allocation_statistics (OMP_CLAUSE
, size
);
9700 t
= ggc_alloc_tree_node (size
);
9701 memset (t
, 0, size
);
9702 TREE_SET_CODE (t
, OMP_CLAUSE
);
9703 OMP_CLAUSE_SET_CODE (t
, code
);
9704 OMP_CLAUSE_LOCATION (t
) = loc
;
9709 /* Build a tcc_vl_exp object with code CODE and room for LEN operands. LEN
9710 includes the implicit operand count in TREE_OPERAND 0, and so must be >= 1.
9711 Except for the CODE and operand count field, other storage for the
9712 object is initialized to zeros. */
9715 build_vl_exp_stat (enum tree_code code
, int len MEM_STAT_DECL
)
9718 int length
= (len
- 1) * sizeof (tree
) + sizeof (struct tree_exp
);
9720 gcc_assert (TREE_CODE_CLASS (code
) == tcc_vl_exp
);
9721 gcc_assert (len
>= 1);
9723 record_node_allocation_statistics (code
, length
);
9725 t
= ggc_alloc_zone_cleared_tree_node_stat (&tree_zone
, length PASS_MEM_STAT
);
9727 TREE_SET_CODE (t
, code
);
9729 /* Can't use TREE_OPERAND to store the length because if checking is
9730 enabled, it will try to check the length before we store it. :-P */
9731 t
->exp
.operands
[0] = build_int_cst (sizetype
, len
);
9736 /* Helper function for build_call_* functions; build a CALL_EXPR with
9737 indicated RETURN_TYPE, FN, and NARGS, but do not initialize any of
9738 the argument slots. */
9741 build_call_1 (tree return_type
, tree fn
, int nargs
)
9745 t
= build_vl_exp (CALL_EXPR
, nargs
+ 3);
9746 TREE_TYPE (t
) = return_type
;
9747 CALL_EXPR_FN (t
) = fn
;
9748 CALL_EXPR_STATIC_CHAIN (t
) = NULL
;
9753 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and
9754 FN and a null static chain slot. NARGS is the number of call arguments
9755 which are specified as "..." arguments. */
9758 build_call_nary (tree return_type
, tree fn
, int nargs
, ...)
9762 va_start (args
, nargs
);
9763 ret
= build_call_valist (return_type
, fn
, nargs
, args
);
9768 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and
9769 FN and a null static chain slot. NARGS is the number of call arguments
9770 which are specified as a va_list ARGS. */
9773 build_call_valist (tree return_type
, tree fn
, int nargs
, va_list args
)
9778 t
= build_call_1 (return_type
, fn
, nargs
);
9779 for (i
= 0; i
< nargs
; i
++)
9780 CALL_EXPR_ARG (t
, i
) = va_arg (args
, tree
);
9781 process_call_operands (t
);
9785 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and
9786 FN and a null static chain slot. NARGS is the number of call arguments
9787 which are specified as a tree array ARGS. */
9790 build_call_array_loc (location_t loc
, tree return_type
, tree fn
,
9791 int nargs
, const tree
*args
)
9796 t
= build_call_1 (return_type
, fn
, nargs
);
9797 for (i
= 0; i
< nargs
; i
++)
9798 CALL_EXPR_ARG (t
, i
) = args
[i
];
9799 process_call_operands (t
);
9800 SET_EXPR_LOCATION (t
, loc
);
9804 /* Like build_call_array, but takes a VEC. */
9807 build_call_vec (tree return_type
, tree fn
, VEC(tree
,gc
) *args
)
9812 ret
= build_call_1 (return_type
, fn
, VEC_length (tree
, args
));
9813 FOR_EACH_VEC_ELT (tree
, args
, ix
, t
)
9814 CALL_EXPR_ARG (ret
, ix
) = t
;
9815 process_call_operands (ret
);
9820 /* Returns true if it is possible to prove that the index of
9821 an array access REF (an ARRAY_REF expression) falls into the
9825 in_array_bounds_p (tree ref
)
9827 tree idx
= TREE_OPERAND (ref
, 1);
9830 if (TREE_CODE (idx
) != INTEGER_CST
)
9833 min
= array_ref_low_bound (ref
);
9834 max
= array_ref_up_bound (ref
);
9837 || TREE_CODE (min
) != INTEGER_CST
9838 || TREE_CODE (max
) != INTEGER_CST
)
9841 if (tree_int_cst_lt (idx
, min
)
9842 || tree_int_cst_lt (max
, idx
))
9848 /* Returns true if it is possible to prove that the range of
9849 an array access REF (an ARRAY_RANGE_REF expression) falls
9850 into the array bounds. */
9853 range_in_array_bounds_p (tree ref
)
9855 tree domain_type
= TYPE_DOMAIN (TREE_TYPE (ref
));
9856 tree range_min
, range_max
, min
, max
;
9858 range_min
= TYPE_MIN_VALUE (domain_type
);
9859 range_max
= TYPE_MAX_VALUE (domain_type
);
9862 || TREE_CODE (range_min
) != INTEGER_CST
9863 || TREE_CODE (range_max
) != INTEGER_CST
)
9866 min
= array_ref_low_bound (ref
);
9867 max
= array_ref_up_bound (ref
);
9870 || TREE_CODE (min
) != INTEGER_CST
9871 || TREE_CODE (max
) != INTEGER_CST
)
9874 if (tree_int_cst_lt (range_min
, min
)
9875 || tree_int_cst_lt (max
, range_max
))
9881 /* Return true if T (assumed to be a DECL) must be assigned a memory
9885 needs_to_live_in_memory (const_tree t
)
9887 if (TREE_CODE (t
) == SSA_NAME
)
9888 t
= SSA_NAME_VAR (t
);
9890 return (TREE_ADDRESSABLE (t
)
9891 || is_global_var (t
)
9892 || (TREE_CODE (t
) == RESULT_DECL
9893 && !DECL_BY_REFERENCE (t
)
9894 && aggregate_value_p (t
, current_function_decl
)));
9897 /* Return value of a constant X and sign-extend it. */
9900 int_cst_value (const_tree x
)
9902 unsigned bits
= TYPE_PRECISION (TREE_TYPE (x
));
9903 unsigned HOST_WIDE_INT val
= TREE_INT_CST_LOW (x
);
9905 /* Make sure the sign-extended value will fit in a HOST_WIDE_INT. */
9906 gcc_assert (TREE_INT_CST_HIGH (x
) == 0
9907 || TREE_INT_CST_HIGH (x
) == -1);
9909 if (bits
< HOST_BITS_PER_WIDE_INT
)
9911 bool negative
= ((val
>> (bits
- 1)) & 1) != 0;
9913 val
|= (~(unsigned HOST_WIDE_INT
) 0) << (bits
- 1) << 1;
9915 val
&= ~((~(unsigned HOST_WIDE_INT
) 0) << (bits
- 1) << 1);
9921 /* Return value of a constant X and sign-extend it. */
9924 widest_int_cst_value (const_tree x
)
9926 unsigned bits
= TYPE_PRECISION (TREE_TYPE (x
));
9927 unsigned HOST_WIDEST_INT val
= TREE_INT_CST_LOW (x
);
9929 #if HOST_BITS_PER_WIDEST_INT > HOST_BITS_PER_WIDE_INT
9930 gcc_assert (HOST_BITS_PER_WIDEST_INT
>= 2 * HOST_BITS_PER_WIDE_INT
);
9931 val
|= (((unsigned HOST_WIDEST_INT
) TREE_INT_CST_HIGH (x
))
9932 << HOST_BITS_PER_WIDE_INT
);
9934 /* Make sure the sign-extended value will fit in a HOST_WIDE_INT. */
9935 gcc_assert (TREE_INT_CST_HIGH (x
) == 0
9936 || TREE_INT_CST_HIGH (x
) == -1);
9939 if (bits
< HOST_BITS_PER_WIDEST_INT
)
9941 bool negative
= ((val
>> (bits
- 1)) & 1) != 0;
9943 val
|= (~(unsigned HOST_WIDEST_INT
) 0) << (bits
- 1) << 1;
9945 val
&= ~((~(unsigned HOST_WIDEST_INT
) 0) << (bits
- 1) << 1);
9951 /* If TYPE is an integral type, return an equivalent type which is
9952 unsigned iff UNSIGNEDP is true. If TYPE is not an integral type,
9953 return TYPE itself. */
9956 signed_or_unsigned_type_for (int unsignedp
, tree type
)
9959 if (POINTER_TYPE_P (type
))
9961 /* If the pointer points to the normal address space, use the
9962 size_type_node. Otherwise use an appropriate size for the pointer
9963 based on the named address space it points to. */
9964 if (!TYPE_ADDR_SPACE (TREE_TYPE (t
)))
9967 return lang_hooks
.types
.type_for_size (TYPE_PRECISION (t
), unsignedp
);
9970 if (!INTEGRAL_TYPE_P (t
) || TYPE_UNSIGNED (t
) == unsignedp
)
9973 return lang_hooks
.types
.type_for_size (TYPE_PRECISION (t
), unsignedp
);
9976 /* Returns unsigned variant of TYPE. */
9979 unsigned_type_for (tree type
)
9981 return signed_or_unsigned_type_for (1, type
);
9984 /* Returns signed variant of TYPE. */
9987 signed_type_for (tree type
)
9989 return signed_or_unsigned_type_for (0, type
);
9992 /* Returns the largest value obtainable by casting something in INNER type to
9996 upper_bound_in_type (tree outer
, tree inner
)
9999 unsigned int det
= 0;
10000 unsigned oprec
= TYPE_PRECISION (outer
);
10001 unsigned iprec
= TYPE_PRECISION (inner
);
10004 /* Compute a unique number for every combination. */
10005 det
|= (oprec
> iprec
) ? 4 : 0;
10006 det
|= TYPE_UNSIGNED (outer
) ? 2 : 0;
10007 det
|= TYPE_UNSIGNED (inner
) ? 1 : 0;
10009 /* Determine the exponent to use. */
10014 /* oprec <= iprec, outer: signed, inner: don't care. */
10019 /* oprec <= iprec, outer: unsigned, inner: don't care. */
10023 /* oprec > iprec, outer: signed, inner: signed. */
10027 /* oprec > iprec, outer: signed, inner: unsigned. */
10031 /* oprec > iprec, outer: unsigned, inner: signed. */
10035 /* oprec > iprec, outer: unsigned, inner: unsigned. */
10039 gcc_unreachable ();
10042 /* Compute 2^^prec - 1. */
10043 if (prec
<= HOST_BITS_PER_WIDE_INT
)
10046 high
.low
= ((~(unsigned HOST_WIDE_INT
) 0)
10047 >> (HOST_BITS_PER_WIDE_INT
- prec
));
10051 high
.high
= ((~(unsigned HOST_WIDE_INT
) 0)
10052 >> (2 * HOST_BITS_PER_WIDE_INT
- prec
));
10053 high
.low
= ~(unsigned HOST_WIDE_INT
) 0;
10056 return double_int_to_tree (outer
, high
);
10059 /* Returns the smallest value obtainable by casting something in INNER type to
10063 lower_bound_in_type (tree outer
, tree inner
)
10066 unsigned oprec
= TYPE_PRECISION (outer
);
10067 unsigned iprec
= TYPE_PRECISION (inner
);
10069 /* If OUTER type is unsigned, we can definitely cast 0 to OUTER type
10071 if (TYPE_UNSIGNED (outer
)
10072 /* If we are widening something of an unsigned type, OUTER type
10073 contains all values of INNER type. In particular, both INNER
10074 and OUTER types have zero in common. */
10075 || (oprec
> iprec
&& TYPE_UNSIGNED (inner
)))
10076 low
.low
= low
.high
= 0;
10079 /* If we are widening a signed type to another signed type, we
10080 want to obtain -2^^(iprec-1). If we are keeping the
10081 precision or narrowing to a signed type, we want to obtain
10083 unsigned prec
= oprec
> iprec
? iprec
: oprec
;
10085 if (prec
<= HOST_BITS_PER_WIDE_INT
)
10087 low
.high
= ~(unsigned HOST_WIDE_INT
) 0;
10088 low
.low
= (~(unsigned HOST_WIDE_INT
) 0) << (prec
- 1);
10092 low
.high
= ((~(unsigned HOST_WIDE_INT
) 0)
10093 << (prec
- HOST_BITS_PER_WIDE_INT
- 1));
10098 return double_int_to_tree (outer
, low
);
10101 /* Return nonzero if two operands that are suitable for PHI nodes are
10102 necessarily equal. Specifically, both ARG0 and ARG1 must be either
10103 SSA_NAME or invariant. Note that this is strictly an optimization.
10104 That is, callers of this function can directly call operand_equal_p
10105 and get the same result, only slower. */
10108 operand_equal_for_phi_arg_p (const_tree arg0
, const_tree arg1
)
10112 if (TREE_CODE (arg0
) == SSA_NAME
|| TREE_CODE (arg1
) == SSA_NAME
)
10114 return operand_equal_p (arg0
, arg1
, 0);
10117 /* Returns number of zeros at the end of binary representation of X.
10119 ??? Use ffs if available? */
10122 num_ending_zeros (const_tree x
)
10124 unsigned HOST_WIDE_INT fr
, nfr
;
10125 unsigned num
, abits
;
10126 tree type
= TREE_TYPE (x
);
10128 if (TREE_INT_CST_LOW (x
) == 0)
10130 num
= HOST_BITS_PER_WIDE_INT
;
10131 fr
= TREE_INT_CST_HIGH (x
);
10136 fr
= TREE_INT_CST_LOW (x
);
10139 for (abits
= HOST_BITS_PER_WIDE_INT
/ 2; abits
; abits
/= 2)
10142 if (nfr
<< abits
== fr
)
10149 if (num
> TYPE_PRECISION (type
))
10150 num
= TYPE_PRECISION (type
);
10152 return build_int_cst_type (type
, num
);
10156 #define WALK_SUBTREE(NODE) \
10159 result = walk_tree_1 (&(NODE), func, data, pset, lh); \
10165 /* This is a subroutine of walk_tree that walks field of TYPE that are to
10166 be walked whenever a type is seen in the tree. Rest of operands and return
10167 value are as for walk_tree. */
10170 walk_type_fields (tree type
, walk_tree_fn func
, void *data
,
10171 struct pointer_set_t
*pset
, walk_tree_lh lh
)
10173 tree result
= NULL_TREE
;
10175 switch (TREE_CODE (type
))
10178 case REFERENCE_TYPE
:
10179 /* We have to worry about mutually recursive pointers. These can't
10180 be written in C. They can in Ada. It's pathological, but
10181 there's an ACATS test (c38102a) that checks it. Deal with this
10182 by checking if we're pointing to another pointer, that one
10183 points to another pointer, that one does too, and we have no htab.
10184 If so, get a hash table. We check three levels deep to avoid
10185 the cost of the hash table if we don't need one. */
10186 if (POINTER_TYPE_P (TREE_TYPE (type
))
10187 && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (type
)))
10188 && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (TREE_TYPE (type
))))
10191 result
= walk_tree_without_duplicates (&TREE_TYPE (type
),
10199 /* ... fall through ... */
10202 WALK_SUBTREE (TREE_TYPE (type
));
10206 WALK_SUBTREE (TYPE_METHOD_BASETYPE (type
));
10208 /* Fall through. */
10210 case FUNCTION_TYPE
:
10211 WALK_SUBTREE (TREE_TYPE (type
));
10215 /* We never want to walk into default arguments. */
10216 for (arg
= TYPE_ARG_TYPES (type
); arg
; arg
= TREE_CHAIN (arg
))
10217 WALK_SUBTREE (TREE_VALUE (arg
));
10222 /* Don't follow this nodes's type if a pointer for fear that
10223 we'll have infinite recursion. If we have a PSET, then we
10226 || (!POINTER_TYPE_P (TREE_TYPE (type
))
10227 && TREE_CODE (TREE_TYPE (type
)) != OFFSET_TYPE
))
10228 WALK_SUBTREE (TREE_TYPE (type
));
10229 WALK_SUBTREE (TYPE_DOMAIN (type
));
10233 WALK_SUBTREE (TREE_TYPE (type
));
10234 WALK_SUBTREE (TYPE_OFFSET_BASETYPE (type
));
10244 /* Apply FUNC to all the sub-trees of TP in a pre-order traversal. FUNC is
10245 called with the DATA and the address of each sub-tree. If FUNC returns a
10246 non-NULL value, the traversal is stopped, and the value returned by FUNC
10247 is returned. If PSET is non-NULL it is used to record the nodes visited,
10248 and to avoid visiting a node more than once. */
10251 walk_tree_1 (tree
*tp
, walk_tree_fn func
, void *data
,
10252 struct pointer_set_t
*pset
, walk_tree_lh lh
)
10254 enum tree_code code
;
10258 #define WALK_SUBTREE_TAIL(NODE) \
10262 goto tail_recurse; \
10267 /* Skip empty subtrees. */
10271 /* Don't walk the same tree twice, if the user has requested
10272 that we avoid doing so. */
10273 if (pset
&& pointer_set_insert (pset
, *tp
))
10276 /* Call the function. */
10278 result
= (*func
) (tp
, &walk_subtrees
, data
);
10280 /* If we found something, return it. */
10284 code
= TREE_CODE (*tp
);
10286 /* Even if we didn't, FUNC may have decided that there was nothing
10287 interesting below this point in the tree. */
10288 if (!walk_subtrees
)
10290 /* But we still need to check our siblings. */
10291 if (code
== TREE_LIST
)
10292 WALK_SUBTREE_TAIL (TREE_CHAIN (*tp
));
10293 else if (code
== OMP_CLAUSE
)
10294 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
10301 result
= (*lh
) (tp
, &walk_subtrees
, func
, data
, pset
);
10302 if (result
|| !walk_subtrees
)
10309 case IDENTIFIER_NODE
:
10316 case PLACEHOLDER_EXPR
:
10320 /* None of these have subtrees other than those already walked
10325 WALK_SUBTREE (TREE_VALUE (*tp
));
10326 WALK_SUBTREE_TAIL (TREE_CHAIN (*tp
));
10331 int len
= TREE_VEC_LENGTH (*tp
);
10336 /* Walk all elements but the first. */
10338 WALK_SUBTREE (TREE_VEC_ELT (*tp
, len
));
10340 /* Now walk the first one as a tail call. */
10341 WALK_SUBTREE_TAIL (TREE_VEC_ELT (*tp
, 0));
10345 WALK_SUBTREE (TREE_REALPART (*tp
));
10346 WALK_SUBTREE_TAIL (TREE_IMAGPART (*tp
));
10350 unsigned HOST_WIDE_INT idx
;
10351 constructor_elt
*ce
;
10354 VEC_iterate(constructor_elt
, CONSTRUCTOR_ELTS (*tp
), idx
, ce
);
10356 WALK_SUBTREE (ce
->value
);
10361 WALK_SUBTREE_TAIL (TREE_OPERAND (*tp
, 0));
10366 for (decl
= BIND_EXPR_VARS (*tp
); decl
; decl
= DECL_CHAIN (decl
))
10368 /* Walk the DECL_INITIAL and DECL_SIZE. We don't want to walk
10369 into declarations that are just mentioned, rather than
10370 declared; they don't really belong to this part of the tree.
10371 And, we can see cycles: the initializer for a declaration
10372 can refer to the declaration itself. */
10373 WALK_SUBTREE (DECL_INITIAL (decl
));
10374 WALK_SUBTREE (DECL_SIZE (decl
));
10375 WALK_SUBTREE (DECL_SIZE_UNIT (decl
));
10377 WALK_SUBTREE_TAIL (BIND_EXPR_BODY (*tp
));
10380 case STATEMENT_LIST
:
10382 tree_stmt_iterator i
;
10383 for (i
= tsi_start (*tp
); !tsi_end_p (i
); tsi_next (&i
))
10384 WALK_SUBTREE (*tsi_stmt_ptr (i
));
10389 switch (OMP_CLAUSE_CODE (*tp
))
10391 case OMP_CLAUSE_PRIVATE
:
10392 case OMP_CLAUSE_SHARED
:
10393 case OMP_CLAUSE_FIRSTPRIVATE
:
10394 case OMP_CLAUSE_COPYIN
:
10395 case OMP_CLAUSE_COPYPRIVATE
:
10396 case OMP_CLAUSE_IF
:
10397 case OMP_CLAUSE_NUM_THREADS
:
10398 case OMP_CLAUSE_SCHEDULE
:
10399 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, 0));
10402 case OMP_CLAUSE_NOWAIT
:
10403 case OMP_CLAUSE_ORDERED
:
10404 case OMP_CLAUSE_DEFAULT
:
10405 case OMP_CLAUSE_UNTIED
:
10406 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
10408 case OMP_CLAUSE_LASTPRIVATE
:
10409 WALK_SUBTREE (OMP_CLAUSE_DECL (*tp
));
10410 WALK_SUBTREE (OMP_CLAUSE_LASTPRIVATE_STMT (*tp
));
10411 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
10413 case OMP_CLAUSE_COLLAPSE
:
10416 for (i
= 0; i
< 3; i
++)
10417 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, i
));
10418 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
10421 case OMP_CLAUSE_REDUCTION
:
10424 for (i
= 0; i
< 4; i
++)
10425 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, i
));
10426 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
10430 gcc_unreachable ();
10438 /* TARGET_EXPRs are peculiar: operands 1 and 3 can be the same.
10439 But, we only want to walk once. */
10440 len
= (TREE_OPERAND (*tp
, 3) == TREE_OPERAND (*tp
, 1)) ? 2 : 3;
10441 for (i
= 0; i
< len
; ++i
)
10442 WALK_SUBTREE (TREE_OPERAND (*tp
, i
));
10443 WALK_SUBTREE_TAIL (TREE_OPERAND (*tp
, len
));
10447 /* If this is a TYPE_DECL, walk into the fields of the type that it's
10448 defining. We only want to walk into these fields of a type in this
10449 case and not in the general case of a mere reference to the type.
10451 The criterion is as follows: if the field can be an expression, it
10452 must be walked only here. This should be in keeping with the fields
10453 that are directly gimplified in gimplify_type_sizes in order for the
10454 mark/copy-if-shared/unmark machinery of the gimplifier to work with
10455 variable-sized types.
10457 Note that DECLs get walked as part of processing the BIND_EXPR. */
10458 if (TREE_CODE (DECL_EXPR_DECL (*tp
)) == TYPE_DECL
)
10460 tree
*type_p
= &TREE_TYPE (DECL_EXPR_DECL (*tp
));
10461 if (TREE_CODE (*type_p
) == ERROR_MARK
)
10464 /* Call the function for the type. See if it returns anything or
10465 doesn't want us to continue. If we are to continue, walk both
10466 the normal fields and those for the declaration case. */
10467 result
= (*func
) (type_p
, &walk_subtrees
, data
);
10468 if (result
|| !walk_subtrees
)
10471 result
= walk_type_fields (*type_p
, func
, data
, pset
, lh
);
10475 /* If this is a record type, also walk the fields. */
10476 if (RECORD_OR_UNION_TYPE_P (*type_p
))
10480 for (field
= TYPE_FIELDS (*type_p
); field
;
10481 field
= DECL_CHAIN (field
))
10483 /* We'd like to look at the type of the field, but we can
10484 easily get infinite recursion. So assume it's pointed
10485 to elsewhere in the tree. Also, ignore things that
10487 if (TREE_CODE (field
) != FIELD_DECL
)
10490 WALK_SUBTREE (DECL_FIELD_OFFSET (field
));
10491 WALK_SUBTREE (DECL_SIZE (field
));
10492 WALK_SUBTREE (DECL_SIZE_UNIT (field
));
10493 if (TREE_CODE (*type_p
) == QUAL_UNION_TYPE
)
10494 WALK_SUBTREE (DECL_QUALIFIER (field
));
10498 /* Same for scalar types. */
10499 else if (TREE_CODE (*type_p
) == BOOLEAN_TYPE
10500 || TREE_CODE (*type_p
) == ENUMERAL_TYPE
10501 || TREE_CODE (*type_p
) == INTEGER_TYPE
10502 || TREE_CODE (*type_p
) == FIXED_POINT_TYPE
10503 || TREE_CODE (*type_p
) == REAL_TYPE
)
10505 WALK_SUBTREE (TYPE_MIN_VALUE (*type_p
));
10506 WALK_SUBTREE (TYPE_MAX_VALUE (*type_p
));
10509 WALK_SUBTREE (TYPE_SIZE (*type_p
));
10510 WALK_SUBTREE_TAIL (TYPE_SIZE_UNIT (*type_p
));
10515 if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code
)))
10519 /* Walk over all the sub-trees of this operand. */
10520 len
= TREE_OPERAND_LENGTH (*tp
);
10522 /* Go through the subtrees. We need to do this in forward order so
10523 that the scope of a FOR_EXPR is handled properly. */
10526 for (i
= 0; i
< len
- 1; ++i
)
10527 WALK_SUBTREE (TREE_OPERAND (*tp
, i
));
10528 WALK_SUBTREE_TAIL (TREE_OPERAND (*tp
, len
- 1));
10531 /* If this is a type, walk the needed fields in the type. */
10532 else if (TYPE_P (*tp
))
10533 return walk_type_fields (*tp
, func
, data
, pset
, lh
);
10537 /* We didn't find what we were looking for. */
10540 #undef WALK_SUBTREE_TAIL
10542 #undef WALK_SUBTREE
10544 /* Like walk_tree, but does not walk duplicate nodes more than once. */
10547 walk_tree_without_duplicates_1 (tree
*tp
, walk_tree_fn func
, void *data
,
10551 struct pointer_set_t
*pset
;
10553 pset
= pointer_set_create ();
10554 result
= walk_tree_1 (tp
, func
, data
, pset
, lh
);
10555 pointer_set_destroy (pset
);
10561 tree_block (tree t
)
10563 char const c
= TREE_CODE_CLASS (TREE_CODE (t
));
10565 if (IS_EXPR_CODE_CLASS (c
))
10566 return &t
->exp
.block
;
10567 gcc_unreachable ();
10571 /* Create a nameless artificial label and put it in the current
10572 function context. The label has a location of LOC. Returns the
10573 newly created label. */
10576 create_artificial_label (location_t loc
)
10578 tree lab
= build_decl (loc
,
10579 LABEL_DECL
, NULL_TREE
, void_type_node
);
10581 DECL_ARTIFICIAL (lab
) = 1;
10582 DECL_IGNORED_P (lab
) = 1;
10583 DECL_CONTEXT (lab
) = current_function_decl
;
10587 /* Given a tree, try to return a useful variable name that we can use
10588 to prefix a temporary that is being assigned the value of the tree.
10589 I.E. given <temp> = &A, return A. */
10594 tree stripped_decl
;
10597 STRIP_NOPS (stripped_decl
);
10598 if (DECL_P (stripped_decl
) && DECL_NAME (stripped_decl
))
10599 return IDENTIFIER_POINTER (DECL_NAME (stripped_decl
));
10602 switch (TREE_CODE (stripped_decl
))
10605 return get_name (TREE_OPERAND (stripped_decl
, 0));
10612 /* Return true if TYPE has a variable argument list. */
10615 stdarg_p (const_tree fntype
)
10617 function_args_iterator args_iter
;
10618 tree n
= NULL_TREE
, t
;
10623 FOREACH_FUNCTION_ARGS(fntype
, t
, args_iter
)
10628 return n
!= NULL_TREE
&& n
!= void_type_node
;
10631 /* Return true if TYPE has a prototype. */
10634 prototype_p (tree fntype
)
10638 gcc_assert (fntype
!= NULL_TREE
);
10640 t
= TYPE_ARG_TYPES (fntype
);
10641 return (t
!= NULL_TREE
);
10644 /* If BLOCK is inlined from an __attribute__((__artificial__))
10645 routine, return pointer to location from where it has been
10648 block_nonartificial_location (tree block
)
10650 location_t
*ret
= NULL
;
10652 while (block
&& TREE_CODE (block
) == BLOCK
10653 && BLOCK_ABSTRACT_ORIGIN (block
))
10655 tree ao
= BLOCK_ABSTRACT_ORIGIN (block
);
10657 while (TREE_CODE (ao
) == BLOCK
10658 && BLOCK_ABSTRACT_ORIGIN (ao
)
10659 && BLOCK_ABSTRACT_ORIGIN (ao
) != ao
)
10660 ao
= BLOCK_ABSTRACT_ORIGIN (ao
);
10662 if (TREE_CODE (ao
) == FUNCTION_DECL
)
10664 /* If AO is an artificial inline, point RET to the
10665 call site locus at which it has been inlined and continue
10666 the loop, in case AO's caller is also an artificial
10668 if (DECL_DECLARED_INLINE_P (ao
)
10669 && lookup_attribute ("artificial", DECL_ATTRIBUTES (ao
)))
10670 ret
= &BLOCK_SOURCE_LOCATION (block
);
10674 else if (TREE_CODE (ao
) != BLOCK
)
10677 block
= BLOCK_SUPERCONTEXT (block
);
10683 /* If EXP is inlined from an __attribute__((__artificial__))
10684 function, return the location of the original call expression. */
10687 tree_nonartificial_location (tree exp
)
10689 location_t
*loc
= block_nonartificial_location (TREE_BLOCK (exp
));
10694 return EXPR_LOCATION (exp
);
10698 /* These are the hash table functions for the hash table of OPTIMIZATION_NODEq
10701 /* Return the hash code code X, an OPTIMIZATION_NODE or TARGET_OPTION code. */
10704 cl_option_hash_hash (const void *x
)
10706 const_tree
const t
= (const_tree
) x
;
10710 hashval_t hash
= 0;
10712 if (TREE_CODE (t
) == OPTIMIZATION_NODE
)
10714 p
= (const char *)TREE_OPTIMIZATION (t
);
10715 len
= sizeof (struct cl_optimization
);
10718 else if (TREE_CODE (t
) == TARGET_OPTION_NODE
)
10720 p
= (const char *)TREE_TARGET_OPTION (t
);
10721 len
= sizeof (struct cl_target_option
);
10725 gcc_unreachable ();
10727 /* assume most opt flags are just 0/1, some are 2-3, and a few might be
10729 for (i
= 0; i
< len
; i
++)
10731 hash
= (hash
<< 4) ^ ((i
<< 2) | p
[i
]);
10736 /* Return nonzero if the value represented by *X (an OPTIMIZATION or
10737 TARGET_OPTION tree node) is the same as that given by *Y, which is the
10741 cl_option_hash_eq (const void *x
, const void *y
)
10743 const_tree
const xt
= (const_tree
) x
;
10744 const_tree
const yt
= (const_tree
) y
;
10749 if (TREE_CODE (xt
) != TREE_CODE (yt
))
10752 if (TREE_CODE (xt
) == OPTIMIZATION_NODE
)
10754 xp
= (const char *)TREE_OPTIMIZATION (xt
);
10755 yp
= (const char *)TREE_OPTIMIZATION (yt
);
10756 len
= sizeof (struct cl_optimization
);
10759 else if (TREE_CODE (xt
) == TARGET_OPTION_NODE
)
10761 xp
= (const char *)TREE_TARGET_OPTION (xt
);
10762 yp
= (const char *)TREE_TARGET_OPTION (yt
);
10763 len
= sizeof (struct cl_target_option
);
10767 gcc_unreachable ();
10769 return (memcmp (xp
, yp
, len
) == 0);
10772 /* Build an OPTIMIZATION_NODE based on the current options. */
10775 build_optimization_node (void)
10780 /* Use the cache of optimization nodes. */
10782 cl_optimization_save (TREE_OPTIMIZATION (cl_optimization_node
),
10785 slot
= htab_find_slot (cl_option_hash_table
, cl_optimization_node
, INSERT
);
10789 /* Insert this one into the hash table. */
10790 t
= cl_optimization_node
;
10793 /* Make a new node for next time round. */
10794 cl_optimization_node
= make_node (OPTIMIZATION_NODE
);
10800 /* Build a TARGET_OPTION_NODE based on the current options. */
10803 build_target_option_node (void)
10808 /* Use the cache of optimization nodes. */
10810 cl_target_option_save (TREE_TARGET_OPTION (cl_target_option_node
),
10813 slot
= htab_find_slot (cl_option_hash_table
, cl_target_option_node
, INSERT
);
10817 /* Insert this one into the hash table. */
10818 t
= cl_target_option_node
;
10821 /* Make a new node for next time round. */
10822 cl_target_option_node
= make_node (TARGET_OPTION_NODE
);
10828 /* Determine the "ultimate origin" of a block. The block may be an inlined
10829 instance of an inlined instance of a block which is local to an inline
10830 function, so we have to trace all of the way back through the origin chain
10831 to find out what sort of node actually served as the original seed for the
10835 block_ultimate_origin (const_tree block
)
10837 tree immediate_origin
= BLOCK_ABSTRACT_ORIGIN (block
);
10839 /* output_inline_function sets BLOCK_ABSTRACT_ORIGIN for all the
10840 nodes in the function to point to themselves; ignore that if
10841 we're trying to output the abstract instance of this function. */
10842 if (BLOCK_ABSTRACT (block
) && immediate_origin
== block
)
10845 if (immediate_origin
== NULL_TREE
)
10850 tree lookahead
= immediate_origin
;
10854 ret_val
= lookahead
;
10855 lookahead
= (TREE_CODE (ret_val
) == BLOCK
10856 ? BLOCK_ABSTRACT_ORIGIN (ret_val
) : NULL
);
10858 while (lookahead
!= NULL
&& lookahead
!= ret_val
);
10860 /* The block's abstract origin chain may not be the *ultimate* origin of
10861 the block. It could lead to a DECL that has an abstract origin set.
10862 If so, we want that DECL's abstract origin (which is what DECL_ORIGIN
10863 will give us if it has one). Note that DECL's abstract origins are
10864 supposed to be the most distant ancestor (or so decl_ultimate_origin
10865 claims), so we don't need to loop following the DECL origins. */
10866 if (DECL_P (ret_val
))
10867 return DECL_ORIGIN (ret_val
);
10873 /* Return true if T1 and T2 are equivalent lists. */
10876 list_equal_p (const_tree t1
, const_tree t2
)
10878 for (; t1
&& t2
; t1
= TREE_CHAIN (t1
) , t2
= TREE_CHAIN (t2
))
10879 if (TREE_VALUE (t1
) != TREE_VALUE (t2
))
10884 /* Return true iff conversion in EXP generates no instruction. Mark
10885 it inline so that we fully inline into the stripping functions even
10886 though we have two uses of this function. */
10889 tree_nop_conversion (const_tree exp
)
10891 tree outer_type
, inner_type
;
10893 if (!CONVERT_EXPR_P (exp
)
10894 && TREE_CODE (exp
) != NON_LVALUE_EXPR
)
10896 if (TREE_OPERAND (exp
, 0) == error_mark_node
)
10899 outer_type
= TREE_TYPE (exp
);
10900 inner_type
= TREE_TYPE (TREE_OPERAND (exp
, 0));
10905 /* Use precision rather then machine mode when we can, which gives
10906 the correct answer even for submode (bit-field) types. */
10907 if ((INTEGRAL_TYPE_P (outer_type
)
10908 || POINTER_TYPE_P (outer_type
)
10909 || TREE_CODE (outer_type
) == OFFSET_TYPE
)
10910 && (INTEGRAL_TYPE_P (inner_type
)
10911 || POINTER_TYPE_P (inner_type
)
10912 || TREE_CODE (inner_type
) == OFFSET_TYPE
))
10913 return TYPE_PRECISION (outer_type
) == TYPE_PRECISION (inner_type
);
10915 /* Otherwise fall back on comparing machine modes (e.g. for
10916 aggregate types, floats). */
10917 return TYPE_MODE (outer_type
) == TYPE_MODE (inner_type
);
10920 /* Return true iff conversion in EXP generates no instruction. Don't
10921 consider conversions changing the signedness. */
10924 tree_sign_nop_conversion (const_tree exp
)
10926 tree outer_type
, inner_type
;
10928 if (!tree_nop_conversion (exp
))
10931 outer_type
= TREE_TYPE (exp
);
10932 inner_type
= TREE_TYPE (TREE_OPERAND (exp
, 0));
10934 return (TYPE_UNSIGNED (outer_type
) == TYPE_UNSIGNED (inner_type
)
10935 && POINTER_TYPE_P (outer_type
) == POINTER_TYPE_P (inner_type
));
10938 /* Strip conversions from EXP according to tree_nop_conversion and
10939 return the resulting expression. */
10942 tree_strip_nop_conversions (tree exp
)
10944 while (tree_nop_conversion (exp
))
10945 exp
= TREE_OPERAND (exp
, 0);
10949 /* Strip conversions from EXP according to tree_sign_nop_conversion
10950 and return the resulting expression. */
10953 tree_strip_sign_nop_conversions (tree exp
)
10955 while (tree_sign_nop_conversion (exp
))
10956 exp
= TREE_OPERAND (exp
, 0);
10960 static GTY(()) tree gcc_eh_personality_decl
;
10962 /* Return the GCC personality function decl. */
10965 lhd_gcc_personality (void)
10967 if (!gcc_eh_personality_decl
)
10968 gcc_eh_personality_decl
= build_personality_function ("gcc");
10969 return gcc_eh_personality_decl
;
10972 /* Try to find a base info of BINFO that would have its field decl at offset
10973 OFFSET within the BINFO type and which is of EXPECTED_TYPE. If it can be
10974 found, return, otherwise return NULL_TREE. */
10977 get_binfo_at_offset (tree binfo
, HOST_WIDE_INT offset
, tree expected_type
)
10979 tree type
= BINFO_TYPE (binfo
);
10983 HOST_WIDE_INT pos
, size
;
10987 if (TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (expected_type
))
10992 for (fld
= TYPE_FIELDS (type
); fld
; fld
= DECL_CHAIN (fld
))
10994 if (TREE_CODE (fld
) != FIELD_DECL
)
10997 pos
= int_bit_position (fld
);
10998 size
= tree_low_cst (DECL_SIZE (fld
), 1);
10999 if (pos
<= offset
&& (pos
+ size
) > offset
)
11002 if (!fld
|| TREE_CODE (TREE_TYPE (fld
)) != RECORD_TYPE
)
11005 if (!DECL_ARTIFICIAL (fld
))
11007 binfo
= TYPE_BINFO (TREE_TYPE (fld
));
11011 /* Offset 0 indicates the primary base, whose vtable contents are
11012 represented in the binfo for the derived class. */
11013 else if (offset
!= 0)
11015 tree base_binfo
, found_binfo
= NULL_TREE
;
11016 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
11017 if (TREE_TYPE (base_binfo
) == TREE_TYPE (fld
))
11019 found_binfo
= base_binfo
;
11024 binfo
= found_binfo
;
11027 type
= TREE_TYPE (fld
);
11032 /* Returns true if X is a typedef decl. */
11035 is_typedef_decl (tree x
)
11037 return (x
&& TREE_CODE (x
) == TYPE_DECL
11038 && DECL_ORIGINAL_TYPE (x
) != NULL_TREE
);
11041 /* Returns true iff TYPE is a type variant created for a typedef. */
11044 typedef_variant_p (tree type
)
11046 return is_typedef_decl (TYPE_NAME (type
));
11049 /* Warn about a use of an identifier which was marked deprecated. */
11051 warn_deprecated_use (tree node
, tree attr
)
11055 if (node
== 0 || !warn_deprecated_decl
)
11061 attr
= DECL_ATTRIBUTES (node
);
11062 else if (TYPE_P (node
))
11064 tree decl
= TYPE_STUB_DECL (node
);
11066 attr
= lookup_attribute ("deprecated",
11067 TYPE_ATTRIBUTES (TREE_TYPE (decl
)));
11072 attr
= lookup_attribute ("deprecated", attr
);
11075 msg
= TREE_STRING_POINTER (TREE_VALUE (TREE_VALUE (attr
)));
11081 expanded_location xloc
= expand_location (DECL_SOURCE_LOCATION (node
));
11083 warning (OPT_Wdeprecated_declarations
,
11084 "%qD is deprecated (declared at %s:%d): %s",
11085 node
, xloc
.file
, xloc
.line
, msg
);
11087 warning (OPT_Wdeprecated_declarations
,
11088 "%qD is deprecated (declared at %s:%d)",
11089 node
, xloc
.file
, xloc
.line
);
11091 else if (TYPE_P (node
))
11093 tree what
= NULL_TREE
;
11094 tree decl
= TYPE_STUB_DECL (node
);
11096 if (TYPE_NAME (node
))
11098 if (TREE_CODE (TYPE_NAME (node
)) == IDENTIFIER_NODE
)
11099 what
= TYPE_NAME (node
);
11100 else if (TREE_CODE (TYPE_NAME (node
)) == TYPE_DECL
11101 && DECL_NAME (TYPE_NAME (node
)))
11102 what
= DECL_NAME (TYPE_NAME (node
));
11107 expanded_location xloc
11108 = expand_location (DECL_SOURCE_LOCATION (decl
));
11112 warning (OPT_Wdeprecated_declarations
,
11113 "%qE is deprecated (declared at %s:%d): %s",
11114 what
, xloc
.file
, xloc
.line
, msg
);
11116 warning (OPT_Wdeprecated_declarations
,
11117 "%qE is deprecated (declared at %s:%d)", what
,
11118 xloc
.file
, xloc
.line
);
11123 warning (OPT_Wdeprecated_declarations
,
11124 "type is deprecated (declared at %s:%d): %s",
11125 xloc
.file
, xloc
.line
, msg
);
11127 warning (OPT_Wdeprecated_declarations
,
11128 "type is deprecated (declared at %s:%d)",
11129 xloc
.file
, xloc
.line
);
11137 warning (OPT_Wdeprecated_declarations
, "%qE is deprecated: %s",
11140 warning (OPT_Wdeprecated_declarations
, "%qE is deprecated", what
);
11145 warning (OPT_Wdeprecated_declarations
, "type is deprecated: %s",
11148 warning (OPT_Wdeprecated_declarations
, "type is deprecated");
11154 #include "gt-tree.h"