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
4 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"
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 "fixed-value.h"
55 #include "tree-pass.h"
56 #include "langhooks-def.h"
57 #include "diagnostic.h"
64 /* Tree code classes. */
66 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
67 #define END_OF_BASE_TREE_CODES tcc_exceptional,
69 const enum tree_code_class tree_code_type
[] = {
70 #include "all-tree.def"
74 #undef END_OF_BASE_TREE_CODES
76 /* Table indexed by tree code giving number of expression
77 operands beyond the fixed part of the node structure.
78 Not used for types or decls. */
80 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
81 #define END_OF_BASE_TREE_CODES 0,
83 const unsigned char tree_code_length
[] = {
84 #include "all-tree.def"
88 #undef END_OF_BASE_TREE_CODES
90 /* Names of tree components.
91 Used for printing out the tree and error messages. */
92 #define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
93 #define END_OF_BASE_TREE_CODES "@dummy",
95 const char *const tree_code_name
[] = {
96 #include "all-tree.def"
100 #undef END_OF_BASE_TREE_CODES
102 /* Each tree code class has an associated string representation.
103 These must correspond to the tree_code_class entries. */
105 const char *const tree_code_class_strings
[] =
120 /* obstack.[ch] explicitly declined to prototype this. */
121 extern int _obstack_allocated_p (struct obstack
*h
, void *obj
);
123 #ifdef GATHER_STATISTICS
124 /* Statistics-gathering stuff. */
126 int tree_node_counts
[(int) all_kinds
];
127 int tree_node_sizes
[(int) all_kinds
];
129 /* Keep in sync with tree.h:enum tree_node_kind. */
130 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_map_marked_p"), param_is (struct tree_map
)))
200 htab_t debug_expr_for_decl
;
202 static GTY ((if_marked ("tree_map_marked_p"), param_is (struct tree_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
;
300 return TS_DECL_NON_COMMON
;
313 default: /* tcc_constant and tcc_exceptional */
318 /* tcc_constant cases. */
319 case INTEGER_CST
: return TS_INT_CST
;
320 case REAL_CST
: return TS_REAL_CST
;
321 case FIXED_CST
: return TS_FIXED_CST
;
322 case COMPLEX_CST
: return TS_COMPLEX
;
323 case VECTOR_CST
: return TS_VECTOR
;
324 case STRING_CST
: return TS_STRING
;
325 /* tcc_exceptional cases. */
326 case ERROR_MARK
: return TS_COMMON
;
327 case IDENTIFIER_NODE
: return TS_IDENTIFIER
;
328 case TREE_LIST
: return TS_LIST
;
329 case TREE_VEC
: return TS_VEC
;
330 case SSA_NAME
: return TS_SSA_NAME
;
331 case PLACEHOLDER_EXPR
: return TS_COMMON
;
332 case STATEMENT_LIST
: return TS_STATEMENT_LIST
;
333 case BLOCK
: return TS_BLOCK
;
334 case CONSTRUCTOR
: return TS_CONSTRUCTOR
;
335 case TREE_BINFO
: return TS_BINFO
;
336 case OMP_CLAUSE
: return TS_OMP_CLAUSE
;
337 case OPTIMIZATION_NODE
: return TS_OPTIMIZATION
;
338 case TARGET_OPTION_NODE
: return TS_TARGET_OPTION
;
346 /* Initialize tree_contains_struct to describe the hierarchy of tree
350 initialize_tree_contains_struct (void)
354 #define MARK_TS_BASE(C) \
356 tree_contains_struct[C][TS_BASE] = 1; \
359 #define MARK_TS_COMMON(C) \
362 tree_contains_struct[C][TS_COMMON] = 1; \
365 #define MARK_TS_DECL_MINIMAL(C) \
367 MARK_TS_COMMON (C); \
368 tree_contains_struct[C][TS_DECL_MINIMAL] = 1; \
371 #define MARK_TS_DECL_COMMON(C) \
373 MARK_TS_DECL_MINIMAL (C); \
374 tree_contains_struct[C][TS_DECL_COMMON] = 1; \
377 #define MARK_TS_DECL_WRTL(C) \
379 MARK_TS_DECL_COMMON (C); \
380 tree_contains_struct[C][TS_DECL_WRTL] = 1; \
383 #define MARK_TS_DECL_WITH_VIS(C) \
385 MARK_TS_DECL_WRTL (C); \
386 tree_contains_struct[C][TS_DECL_WITH_VIS] = 1; \
389 #define MARK_TS_DECL_NON_COMMON(C) \
391 MARK_TS_DECL_WITH_VIS (C); \
392 tree_contains_struct[C][TS_DECL_NON_COMMON] = 1; \
395 for (i
= ERROR_MARK
; i
< LAST_AND_UNUSED_TREE_CODE
; i
++)
398 enum tree_node_structure_enum ts_code
;
400 code
= (enum tree_code
) i
;
401 ts_code
= tree_node_structure_for_code (code
);
403 /* Mark the TS structure itself. */
404 tree_contains_struct
[code
][ts_code
] = 1;
406 /* Mark all the structures that TS is derived from. */
420 case TS_DECL_MINIMAL
:
428 case TS_STATEMENT_LIST
:
431 case TS_OPTIMIZATION
:
432 case TS_TARGET_OPTION
:
433 MARK_TS_COMMON (code
);
437 MARK_TS_DECL_MINIMAL (code
);
441 MARK_TS_DECL_COMMON (code
);
444 case TS_DECL_NON_COMMON
:
445 MARK_TS_DECL_WITH_VIS (code
);
448 case TS_DECL_WITH_VIS
:
453 MARK_TS_DECL_WRTL (code
);
457 MARK_TS_DECL_COMMON (code
);
461 MARK_TS_DECL_WITH_VIS (code
);
465 case TS_FUNCTION_DECL
:
466 MARK_TS_DECL_NON_COMMON (code
);
474 /* Basic consistency checks for attributes used in fold. */
475 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_NON_COMMON
]);
476 gcc_assert (tree_contains_struct
[TRANSLATION_UNIT_DECL
][TS_DECL_NON_COMMON
]);
477 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_NON_COMMON
]);
478 gcc_assert (tree_contains_struct
[CONST_DECL
][TS_DECL_COMMON
]);
479 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_COMMON
]);
480 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_DECL_COMMON
]);
481 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_DECL_COMMON
]);
482 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_COMMON
]);
483 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_COMMON
]);
484 gcc_assert (tree_contains_struct
[TRANSLATION_UNIT_DECL
][TS_DECL_COMMON
]);
485 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_DECL_COMMON
]);
486 gcc_assert (tree_contains_struct
[FIELD_DECL
][TS_DECL_COMMON
]);
487 gcc_assert (tree_contains_struct
[CONST_DECL
][TS_DECL_WRTL
]);
488 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_WRTL
]);
489 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_DECL_WRTL
]);
490 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_DECL_WRTL
]);
491 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_WRTL
]);
492 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_DECL_WRTL
]);
493 gcc_assert (tree_contains_struct
[CONST_DECL
][TS_DECL_MINIMAL
]);
494 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_MINIMAL
]);
495 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_DECL_MINIMAL
]);
496 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_DECL_MINIMAL
]);
497 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_MINIMAL
]);
498 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_MINIMAL
]);
499 gcc_assert (tree_contains_struct
[TRANSLATION_UNIT_DECL
][TS_DECL_MINIMAL
]);
500 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_DECL_MINIMAL
]);
501 gcc_assert (tree_contains_struct
[FIELD_DECL
][TS_DECL_MINIMAL
]);
502 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_DECL_WITH_VIS
]);
503 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_DECL_WITH_VIS
]);
504 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_DECL_WITH_VIS
]);
505 gcc_assert (tree_contains_struct
[TRANSLATION_UNIT_DECL
][TS_DECL_WITH_VIS
]);
506 gcc_assert (tree_contains_struct
[VAR_DECL
][TS_VAR_DECL
]);
507 gcc_assert (tree_contains_struct
[FIELD_DECL
][TS_FIELD_DECL
]);
508 gcc_assert (tree_contains_struct
[PARM_DECL
][TS_PARM_DECL
]);
509 gcc_assert (tree_contains_struct
[LABEL_DECL
][TS_LABEL_DECL
]);
510 gcc_assert (tree_contains_struct
[RESULT_DECL
][TS_RESULT_DECL
]);
511 gcc_assert (tree_contains_struct
[CONST_DECL
][TS_CONST_DECL
]);
512 gcc_assert (tree_contains_struct
[TYPE_DECL
][TS_TYPE_DECL
]);
513 gcc_assert (tree_contains_struct
[FUNCTION_DECL
][TS_FUNCTION_DECL
]);
514 gcc_assert (tree_contains_struct
[IMPORTED_DECL
][TS_DECL_MINIMAL
]);
515 gcc_assert (tree_contains_struct
[IMPORTED_DECL
][TS_DECL_COMMON
]);
518 #undef MARK_TS_COMMON
519 #undef MARK_TS_DECL_MINIMAL
520 #undef MARK_TS_DECL_COMMON
521 #undef MARK_TS_DECL_WRTL
522 #undef MARK_TS_DECL_WITH_VIS
523 #undef MARK_TS_DECL_NON_COMMON
532 /* Initialize the hash table of types. */
533 type_hash_table
= htab_create_ggc (TYPE_HASH_INITIAL_SIZE
, type_hash_hash
,
536 debug_expr_for_decl
= htab_create_ggc (512, tree_map_hash
,
539 value_expr_for_decl
= htab_create_ggc (512, tree_map_hash
,
541 init_priority_for_decl
= htab_create_ggc (512, tree_priority_map_hash
,
542 tree_priority_map_eq
, 0);
544 int_cst_hash_table
= htab_create_ggc (1024, int_cst_hash_hash
,
545 int_cst_hash_eq
, NULL
);
547 int_cst_node
= make_node (INTEGER_CST
);
549 cl_option_hash_table
= htab_create_ggc (64, cl_option_hash_hash
,
550 cl_option_hash_eq
, NULL
);
552 cl_optimization_node
= make_node (OPTIMIZATION_NODE
);
553 cl_target_option_node
= make_node (TARGET_OPTION_NODE
);
555 /* Initialize the tree_contains_struct array. */
556 initialize_tree_contains_struct ();
557 lang_hooks
.init_ts ();
561 /* The name of the object as the assembler will see it (but before any
562 translations made by ASM_OUTPUT_LABELREF). Often this is the same
563 as DECL_NAME. It is an IDENTIFIER_NODE. */
565 decl_assembler_name (tree decl
)
567 if (!DECL_ASSEMBLER_NAME_SET_P (decl
))
568 lang_hooks
.set_decl_assembler_name (decl
);
569 return DECL_WITH_VIS_CHECK (decl
)->decl_with_vis
.assembler_name
;
572 /* Compare ASMNAME with the DECL_ASSEMBLER_NAME of DECL. */
575 decl_assembler_name_equal (tree decl
, const_tree asmname
)
577 tree decl_asmname
= DECL_ASSEMBLER_NAME (decl
);
578 const char *decl_str
;
579 const char *asmname_str
;
582 if (decl_asmname
== asmname
)
585 decl_str
= IDENTIFIER_POINTER (decl_asmname
);
586 asmname_str
= IDENTIFIER_POINTER (asmname
);
589 /* If the target assembler name was set by the user, things are trickier.
590 We have a leading '*' to begin with. After that, it's arguable what
591 is the correct thing to do with -fleading-underscore. Arguably, we've
592 historically been doing the wrong thing in assemble_alias by always
593 printing the leading underscore. Since we're not changing that, make
594 sure user_label_prefix follows the '*' before matching. */
595 if (decl_str
[0] == '*')
597 size_t ulp_len
= strlen (user_label_prefix
);
603 else if (strncmp (decl_str
, user_label_prefix
, ulp_len
) == 0)
604 decl_str
+= ulp_len
, test
=true;
608 if (asmname_str
[0] == '*')
610 size_t ulp_len
= strlen (user_label_prefix
);
616 else if (strncmp (asmname_str
, user_label_prefix
, ulp_len
) == 0)
617 asmname_str
+= ulp_len
, test
=true;
624 return strcmp (decl_str
, asmname_str
) == 0;
627 /* Hash asmnames ignoring the user specified marks. */
630 decl_assembler_name_hash (const_tree asmname
)
632 if (IDENTIFIER_POINTER (asmname
)[0] == '*')
634 const char *decl_str
= IDENTIFIER_POINTER (asmname
) + 1;
635 size_t ulp_len
= strlen (user_label_prefix
);
639 else if (strncmp (decl_str
, user_label_prefix
, ulp_len
) == 0)
642 return htab_hash_string (decl_str
);
645 return htab_hash_string (IDENTIFIER_POINTER (asmname
));
648 /* Compute the number of bytes occupied by a tree with code CODE.
649 This function cannot be used for nodes that have variable sizes,
650 including TREE_VEC, STRING_CST, and CALL_EXPR. */
652 tree_code_size (enum tree_code code
)
654 switch (TREE_CODE_CLASS (code
))
656 case tcc_declaration
: /* A decl node */
661 return sizeof (struct tree_field_decl
);
663 return sizeof (struct tree_parm_decl
);
665 return sizeof (struct tree_var_decl
);
667 return sizeof (struct tree_label_decl
);
669 return sizeof (struct tree_result_decl
);
671 return sizeof (struct tree_const_decl
);
673 return sizeof (struct tree_type_decl
);
675 return sizeof (struct tree_function_decl
);
676 case DEBUG_EXPR_DECL
:
677 return sizeof (struct tree_decl_with_rtl
);
679 return sizeof (struct tree_decl_non_common
);
683 case tcc_type
: /* a type node */
684 return sizeof (struct tree_type
);
686 case tcc_reference
: /* a reference */
687 case tcc_expression
: /* an expression */
688 case tcc_statement
: /* an expression with side effects */
689 case tcc_comparison
: /* a comparison expression */
690 case tcc_unary
: /* a unary arithmetic expression */
691 case tcc_binary
: /* a binary arithmetic expression */
692 return (sizeof (struct tree_exp
)
693 + (TREE_CODE_LENGTH (code
) - 1) * sizeof (tree
));
695 case tcc_constant
: /* a constant */
698 case INTEGER_CST
: return sizeof (struct tree_int_cst
);
699 case REAL_CST
: return sizeof (struct tree_real_cst
);
700 case FIXED_CST
: return sizeof (struct tree_fixed_cst
);
701 case COMPLEX_CST
: return sizeof (struct tree_complex
);
702 case VECTOR_CST
: return sizeof (struct tree_vector
);
703 case STRING_CST
: gcc_unreachable ();
705 return lang_hooks
.tree_size (code
);
708 case tcc_exceptional
: /* something random, like an identifier. */
711 case IDENTIFIER_NODE
: return lang_hooks
.identifier_size
;
712 case TREE_LIST
: return sizeof (struct tree_list
);
715 case PLACEHOLDER_EXPR
: return sizeof (struct tree_common
);
718 case OMP_CLAUSE
: gcc_unreachable ();
720 case SSA_NAME
: return sizeof (struct tree_ssa_name
);
722 case STATEMENT_LIST
: return sizeof (struct tree_statement_list
);
723 case BLOCK
: return sizeof (struct tree_block
);
724 case CONSTRUCTOR
: return sizeof (struct tree_constructor
);
725 case OPTIMIZATION_NODE
: return sizeof (struct tree_optimization_option
);
726 case TARGET_OPTION_NODE
: return sizeof (struct tree_target_option
);
729 return lang_hooks
.tree_size (code
);
737 /* Compute the number of bytes occupied by NODE. This routine only
738 looks at TREE_CODE, except for those nodes that have variable sizes. */
740 tree_size (const_tree node
)
742 const enum tree_code code
= TREE_CODE (node
);
746 return (offsetof (struct tree_binfo
, base_binfos
)
747 + VEC_embedded_size (tree
, BINFO_N_BASE_BINFOS (node
)));
750 return (sizeof (struct tree_vec
)
751 + (TREE_VEC_LENGTH (node
) - 1) * sizeof (tree
));
754 return TREE_STRING_LENGTH (node
) + offsetof (struct tree_string
, str
) + 1;
757 return (sizeof (struct tree_omp_clause
)
758 + (omp_clause_num_ops
[OMP_CLAUSE_CODE (node
)] - 1)
762 if (TREE_CODE_CLASS (code
) == tcc_vl_exp
)
763 return (sizeof (struct tree_exp
)
764 + (VL_EXP_OPERAND_LENGTH (node
) - 1) * sizeof (tree
));
766 return tree_code_size (code
);
770 /* Return a newly allocated node of code CODE. For decl and type
771 nodes, some other fields are initialized. The rest of the node is
772 initialized to zero. This function cannot be used for TREE_VEC or
773 OMP_CLAUSE nodes, which is enforced by asserts in tree_code_size.
775 Achoo! I got a code in the node. */
778 make_node_stat (enum tree_code code MEM_STAT_DECL
)
781 enum tree_code_class type
= TREE_CODE_CLASS (code
);
782 size_t length
= tree_code_size (code
);
783 #ifdef GATHER_STATISTICS
788 case tcc_declaration
: /* A decl node */
792 case tcc_type
: /* a type node */
796 case tcc_statement
: /* an expression with side effects */
800 case tcc_reference
: /* a reference */
804 case tcc_expression
: /* an expression */
805 case tcc_comparison
: /* a comparison expression */
806 case tcc_unary
: /* a unary arithmetic expression */
807 case tcc_binary
: /* a binary arithmetic expression */
811 case tcc_constant
: /* a constant */
815 case tcc_exceptional
: /* something random, like an identifier. */
818 case IDENTIFIER_NODE
:
831 kind
= ssa_name_kind
;
852 tree_node_counts
[(int) kind
]++;
853 tree_node_sizes
[(int) kind
] += length
;
856 if (code
== IDENTIFIER_NODE
)
857 t
= (tree
) ggc_alloc_zone_pass_stat (length
, &tree_id_zone
);
859 t
= (tree
) ggc_alloc_zone_pass_stat (length
, &tree_zone
);
861 memset (t
, 0, length
);
863 TREE_SET_CODE (t
, code
);
868 TREE_SIDE_EFFECTS (t
) = 1;
871 case tcc_declaration
:
872 if (CODE_CONTAINS_STRUCT (code
, TS_DECL_COMMON
))
874 if (code
== FUNCTION_DECL
)
876 DECL_ALIGN (t
) = FUNCTION_BOUNDARY
;
877 DECL_MODE (t
) = FUNCTION_MODE
;
882 DECL_SOURCE_LOCATION (t
) = input_location
;
883 if (TREE_CODE (t
) == DEBUG_EXPR_DECL
)
884 DECL_UID (t
) = --next_debug_decl_uid
;
886 DECL_UID (t
) = next_decl_uid
++;
887 if (TREE_CODE (t
) == LABEL_DECL
)
888 LABEL_DECL_UID (t
) = -1;
893 TYPE_UID (t
) = next_type_uid
++;
894 TYPE_ALIGN (t
) = BITS_PER_UNIT
;
895 TYPE_USER_ALIGN (t
) = 0;
896 TYPE_MAIN_VARIANT (t
) = t
;
897 TYPE_CANONICAL (t
) = t
;
899 /* Default to no attributes for type, but let target change that. */
900 TYPE_ATTRIBUTES (t
) = NULL_TREE
;
901 targetm
.set_default_type_attributes (t
);
903 /* We have not yet computed the alias set for this type. */
904 TYPE_ALIAS_SET (t
) = -1;
908 TREE_CONSTANT (t
) = 1;
917 case PREDECREMENT_EXPR
:
918 case PREINCREMENT_EXPR
:
919 case POSTDECREMENT_EXPR
:
920 case POSTINCREMENT_EXPR
:
921 /* All of these have side-effects, no matter what their
923 TREE_SIDE_EFFECTS (t
) = 1;
932 /* Other classes need no special treatment. */
939 /* Return a new node with the same contents as NODE except that its
940 TREE_CHAIN is zero and it has a fresh uid. */
943 copy_node_stat (tree node MEM_STAT_DECL
)
946 enum tree_code code
= TREE_CODE (node
);
949 gcc_assert (code
!= STATEMENT_LIST
);
951 length
= tree_size (node
);
952 t
= (tree
) ggc_alloc_zone_pass_stat (length
, &tree_zone
);
953 memcpy (t
, node
, length
);
956 TREE_ASM_WRITTEN (t
) = 0;
957 TREE_VISITED (t
) = 0;
958 if (code
== VAR_DECL
|| code
== PARM_DECL
|| code
== RESULT_DECL
)
959 *DECL_VAR_ANN_PTR (t
) = 0;
961 if (TREE_CODE_CLASS (code
) == tcc_declaration
)
963 if (code
== DEBUG_EXPR_DECL
)
964 DECL_UID (t
) = --next_debug_decl_uid
;
966 DECL_UID (t
) = next_decl_uid
++;
967 if ((TREE_CODE (node
) == PARM_DECL
|| TREE_CODE (node
) == VAR_DECL
)
968 && DECL_HAS_VALUE_EXPR_P (node
))
970 SET_DECL_VALUE_EXPR (t
, DECL_VALUE_EXPR (node
));
971 DECL_HAS_VALUE_EXPR_P (t
) = 1;
973 if (TREE_CODE (node
) == VAR_DECL
&& DECL_HAS_INIT_PRIORITY_P (node
))
975 SET_DECL_INIT_PRIORITY (t
, DECL_INIT_PRIORITY (node
));
976 DECL_HAS_INIT_PRIORITY_P (t
) = 1;
979 else if (TREE_CODE_CLASS (code
) == tcc_type
)
981 TYPE_UID (t
) = next_type_uid
++;
982 /* The following is so that the debug code for
983 the copy is different from the original type.
984 The two statements usually duplicate each other
985 (because they clear fields of the same union),
986 but the optimizer should catch that. */
987 TYPE_SYMTAB_POINTER (t
) = 0;
988 TYPE_SYMTAB_ADDRESS (t
) = 0;
990 /* Do not copy the values cache. */
991 if (TYPE_CACHED_VALUES_P(t
))
993 TYPE_CACHED_VALUES_P (t
) = 0;
994 TYPE_CACHED_VALUES (t
) = NULL_TREE
;
1001 /* Return a copy of a chain of nodes, chained through the TREE_CHAIN field.
1002 For example, this can copy a list made of TREE_LIST nodes. */
1005 copy_list (tree list
)
1013 head
= prev
= copy_node (list
);
1014 next
= TREE_CHAIN (list
);
1017 TREE_CHAIN (prev
) = copy_node (next
);
1018 prev
= TREE_CHAIN (prev
);
1019 next
= TREE_CHAIN (next
);
1025 /* Create an INT_CST node with a LOW value sign extended. */
1028 build_int_cst (tree type
, HOST_WIDE_INT low
)
1030 /* Support legacy code. */
1032 type
= integer_type_node
;
1034 return build_int_cst_wide (type
, low
, low
< 0 ? -1 : 0);
1037 /* Create an INT_CST node with a LOW value zero extended. */
1040 build_int_cstu (tree type
, unsigned HOST_WIDE_INT low
)
1042 return build_int_cst_wide (type
, low
, 0);
1045 /* Create an INT_CST node with a LOW value in TYPE. The value is sign extended
1046 if it is negative. This function is similar to build_int_cst, but
1047 the extra bits outside of the type precision are cleared. Constants
1048 with these extra bits may confuse the fold so that it detects overflows
1049 even in cases when they do not occur, and in general should be avoided.
1050 We cannot however make this a default behavior of build_int_cst without
1051 more intrusive changes, since there are parts of gcc that rely on the extra
1052 precision of the integer constants. */
1055 build_int_cst_type (tree type
, HOST_WIDE_INT low
)
1057 unsigned HOST_WIDE_INT low1
;
1062 fit_double_type (low
, low
< 0 ? -1 : 0, &low1
, &hi
, type
);
1064 return build_int_cst_wide (type
, low1
, hi
);
1067 /* Create an INT_CST node of TYPE and value HI:LOW. The value is truncated
1068 and sign extended according to the value range of TYPE. */
1071 build_int_cst_wide_type (tree type
,
1072 unsigned HOST_WIDE_INT low
, HOST_WIDE_INT high
)
1074 fit_double_type (low
, high
, &low
, &high
, type
);
1075 return build_int_cst_wide (type
, low
, high
);
1078 /* These are the hash table functions for the hash table of INTEGER_CST
1079 nodes of a sizetype. */
1081 /* Return the hash code code X, an INTEGER_CST. */
1084 int_cst_hash_hash (const void *x
)
1086 const_tree
const t
= (const_tree
) x
;
1088 return (TREE_INT_CST_HIGH (t
) ^ TREE_INT_CST_LOW (t
)
1089 ^ htab_hash_pointer (TREE_TYPE (t
)));
1092 /* Return nonzero if the value represented by *X (an INTEGER_CST tree node)
1093 is the same as that given by *Y, which is the same. */
1096 int_cst_hash_eq (const void *x
, const void *y
)
1098 const_tree
const xt
= (const_tree
) x
;
1099 const_tree
const yt
= (const_tree
) y
;
1101 return (TREE_TYPE (xt
) == TREE_TYPE (yt
)
1102 && TREE_INT_CST_HIGH (xt
) == TREE_INT_CST_HIGH (yt
)
1103 && TREE_INT_CST_LOW (xt
) == TREE_INT_CST_LOW (yt
));
1106 /* Create an INT_CST node of TYPE and value HI:LOW.
1107 The returned node is always shared. For small integers we use a
1108 per-type vector cache, for larger ones we use a single hash table. */
1111 build_int_cst_wide (tree type
, unsigned HOST_WIDE_INT low
, HOST_WIDE_INT hi
)
1119 switch (TREE_CODE (type
))
1122 case REFERENCE_TYPE
:
1123 /* Cache NULL pointer. */
1132 /* Cache false or true. */
1140 if (TYPE_UNSIGNED (type
))
1143 limit
= INTEGER_SHARE_LIMIT
;
1144 if (!hi
&& low
< (unsigned HOST_WIDE_INT
)INTEGER_SHARE_LIMIT
)
1150 limit
= INTEGER_SHARE_LIMIT
+ 1;
1151 if (!hi
&& low
< (unsigned HOST_WIDE_INT
)INTEGER_SHARE_LIMIT
)
1153 else if (hi
== -1 && low
== -(unsigned HOST_WIDE_INT
)1)
1167 /* Look for it in the type's vector of small shared ints. */
1168 if (!TYPE_CACHED_VALUES_P (type
))
1170 TYPE_CACHED_VALUES_P (type
) = 1;
1171 TYPE_CACHED_VALUES (type
) = make_tree_vec (limit
);
1174 t
= TREE_VEC_ELT (TYPE_CACHED_VALUES (type
), ix
);
1177 /* Make sure no one is clobbering the shared constant. */
1178 gcc_assert (TREE_TYPE (t
) == type
);
1179 gcc_assert (TREE_INT_CST_LOW (t
) == low
);
1180 gcc_assert (TREE_INT_CST_HIGH (t
) == hi
);
1184 /* Create a new shared int. */
1185 t
= make_node (INTEGER_CST
);
1187 TREE_INT_CST_LOW (t
) = low
;
1188 TREE_INT_CST_HIGH (t
) = hi
;
1189 TREE_TYPE (t
) = type
;
1191 TREE_VEC_ELT (TYPE_CACHED_VALUES (type
), ix
) = t
;
1196 /* Use the cache of larger shared ints. */
1199 TREE_INT_CST_LOW (int_cst_node
) = low
;
1200 TREE_INT_CST_HIGH (int_cst_node
) = hi
;
1201 TREE_TYPE (int_cst_node
) = type
;
1203 slot
= htab_find_slot (int_cst_hash_table
, int_cst_node
, INSERT
);
1207 /* Insert this one into the hash table. */
1210 /* Make a new node for next time round. */
1211 int_cst_node
= make_node (INTEGER_CST
);
1218 /* Builds an integer constant in TYPE such that lowest BITS bits are ones
1219 and the rest are zeros. */
1222 build_low_bits_mask (tree type
, unsigned bits
)
1224 unsigned HOST_WIDE_INT low
;
1226 unsigned HOST_WIDE_INT all_ones
= ~(unsigned HOST_WIDE_INT
) 0;
1228 gcc_assert (bits
<= TYPE_PRECISION (type
));
1230 if (bits
== TYPE_PRECISION (type
)
1231 && !TYPE_UNSIGNED (type
))
1233 /* Sign extended all-ones mask. */
1237 else if (bits
<= HOST_BITS_PER_WIDE_INT
)
1239 low
= all_ones
>> (HOST_BITS_PER_WIDE_INT
- bits
);
1244 bits
-= HOST_BITS_PER_WIDE_INT
;
1246 high
= all_ones
>> (HOST_BITS_PER_WIDE_INT
- bits
);
1249 return build_int_cst_wide (type
, low
, high
);
1252 /* Checks that X is integer constant that can be expressed in (unsigned)
1253 HOST_WIDE_INT without loss of precision. */
1256 cst_and_fits_in_hwi (const_tree x
)
1258 if (TREE_CODE (x
) != INTEGER_CST
)
1261 if (TYPE_PRECISION (TREE_TYPE (x
)) > HOST_BITS_PER_WIDE_INT
)
1264 return (TREE_INT_CST_HIGH (x
) == 0
1265 || TREE_INT_CST_HIGH (x
) == -1);
1268 /* Return a new VECTOR_CST node whose type is TYPE and whose values
1269 are in a list pointed to by VALS. */
1272 build_vector (tree type
, tree vals
)
1274 tree v
= make_node (VECTOR_CST
);
1278 TREE_VECTOR_CST_ELTS (v
) = vals
;
1279 TREE_TYPE (v
) = type
;
1281 /* Iterate through elements and check for overflow. */
1282 for (link
= vals
; link
; link
= TREE_CHAIN (link
))
1284 tree value
= TREE_VALUE (link
);
1286 /* Don't crash if we get an address constant. */
1287 if (!CONSTANT_CLASS_P (value
))
1290 over
|= TREE_OVERFLOW (value
);
1293 TREE_OVERFLOW (v
) = over
;
1297 /* Return a new VECTOR_CST node whose type is TYPE and whose values
1298 are extracted from V, a vector of CONSTRUCTOR_ELT. */
1301 build_vector_from_ctor (tree type
, VEC(constructor_elt
,gc
) *v
)
1303 tree list
= NULL_TREE
;
1304 unsigned HOST_WIDE_INT idx
;
1307 FOR_EACH_CONSTRUCTOR_VALUE (v
, idx
, value
)
1308 list
= tree_cons (NULL_TREE
, value
, list
);
1309 return build_vector (type
, nreverse (list
));
1312 /* Return a new CONSTRUCTOR node whose type is TYPE and whose values
1313 are in the VEC pointed to by VALS. */
1315 build_constructor (tree type
, VEC(constructor_elt
,gc
) *vals
)
1317 tree c
= make_node (CONSTRUCTOR
);
1318 TREE_TYPE (c
) = type
;
1319 CONSTRUCTOR_ELTS (c
) = vals
;
1323 /* Build a CONSTRUCTOR node made of a single initializer, with the specified
1326 build_constructor_single (tree type
, tree index
, tree value
)
1328 VEC(constructor_elt
,gc
) *v
;
1329 constructor_elt
*elt
;
1332 v
= VEC_alloc (constructor_elt
, gc
, 1);
1333 elt
= VEC_quick_push (constructor_elt
, v
, NULL
);
1337 t
= build_constructor (type
, v
);
1338 TREE_CONSTANT (t
) = TREE_CONSTANT (value
);
1343 /* Return a new CONSTRUCTOR node whose type is TYPE and whose values
1344 are in a list pointed to by VALS. */
1346 build_constructor_from_list (tree type
, tree vals
)
1349 VEC(constructor_elt
,gc
) *v
= NULL
;
1350 bool constant_p
= true;
1354 v
= VEC_alloc (constructor_elt
, gc
, list_length (vals
));
1355 for (t
= vals
; t
; t
= TREE_CHAIN (t
))
1357 constructor_elt
*elt
= VEC_quick_push (constructor_elt
, v
, NULL
);
1358 val
= TREE_VALUE (t
);
1359 elt
->index
= TREE_PURPOSE (t
);
1361 if (!TREE_CONSTANT (val
))
1366 t
= build_constructor (type
, v
);
1367 TREE_CONSTANT (t
) = constant_p
;
1371 /* Return a new FIXED_CST node whose type is TYPE and value is F. */
1374 build_fixed (tree type
, FIXED_VALUE_TYPE f
)
1377 FIXED_VALUE_TYPE
*fp
;
1379 v
= make_node (FIXED_CST
);
1380 fp
= GGC_NEW (FIXED_VALUE_TYPE
);
1381 memcpy (fp
, &f
, sizeof (FIXED_VALUE_TYPE
));
1383 TREE_TYPE (v
) = type
;
1384 TREE_FIXED_CST_PTR (v
) = fp
;
1388 /* Return a new REAL_CST node whose type is TYPE and value is D. */
1391 build_real (tree type
, REAL_VALUE_TYPE d
)
1394 REAL_VALUE_TYPE
*dp
;
1397 /* ??? Used to check for overflow here via CHECK_FLOAT_TYPE.
1398 Consider doing it via real_convert now. */
1400 v
= make_node (REAL_CST
);
1401 dp
= GGC_NEW (REAL_VALUE_TYPE
);
1402 memcpy (dp
, &d
, sizeof (REAL_VALUE_TYPE
));
1404 TREE_TYPE (v
) = type
;
1405 TREE_REAL_CST_PTR (v
) = dp
;
1406 TREE_OVERFLOW (v
) = overflow
;
1410 /* Return a new REAL_CST node whose type is TYPE
1411 and whose value is the integer value of the INTEGER_CST node I. */
1414 real_value_from_int_cst (const_tree type
, const_tree i
)
1418 /* Clear all bits of the real value type so that we can later do
1419 bitwise comparisons to see if two values are the same. */
1420 memset (&d
, 0, sizeof d
);
1422 real_from_integer (&d
, type
? TYPE_MODE (type
) : VOIDmode
,
1423 TREE_INT_CST_LOW (i
), TREE_INT_CST_HIGH (i
),
1424 TYPE_UNSIGNED (TREE_TYPE (i
)));
1428 /* Given a tree representing an integer constant I, return a tree
1429 representing the same value as a floating-point constant of type TYPE. */
1432 build_real_from_int_cst (tree type
, const_tree i
)
1435 int overflow
= TREE_OVERFLOW (i
);
1437 v
= build_real (type
, real_value_from_int_cst (type
, i
));
1439 TREE_OVERFLOW (v
) |= overflow
;
1443 /* Return a newly constructed STRING_CST node whose value is
1444 the LEN characters at STR.
1445 The TREE_TYPE is not initialized. */
1448 build_string (int len
, const char *str
)
1453 /* Do not waste bytes provided by padding of struct tree_string. */
1454 length
= len
+ offsetof (struct tree_string
, str
) + 1;
1456 #ifdef GATHER_STATISTICS
1457 tree_node_counts
[(int) c_kind
]++;
1458 tree_node_sizes
[(int) c_kind
] += length
;
1461 s
= ggc_alloc_tree (length
);
1463 memset (s
, 0, sizeof (struct tree_common
));
1464 TREE_SET_CODE (s
, STRING_CST
);
1465 TREE_CONSTANT (s
) = 1;
1466 TREE_STRING_LENGTH (s
) = len
;
1467 memcpy (s
->string
.str
, str
, len
);
1468 s
->string
.str
[len
] = '\0';
1473 /* Return a newly constructed COMPLEX_CST node whose value is
1474 specified by the real and imaginary parts REAL and IMAG.
1475 Both REAL and IMAG should be constant nodes. TYPE, if specified,
1476 will be the type of the COMPLEX_CST; otherwise a new type will be made. */
1479 build_complex (tree type
, tree real
, tree imag
)
1481 tree t
= make_node (COMPLEX_CST
);
1483 TREE_REALPART (t
) = real
;
1484 TREE_IMAGPART (t
) = imag
;
1485 TREE_TYPE (t
) = type
? type
: build_complex_type (TREE_TYPE (real
));
1486 TREE_OVERFLOW (t
) = TREE_OVERFLOW (real
) | TREE_OVERFLOW (imag
);
1490 /* Return a constant of arithmetic type TYPE which is the
1491 multiplicative identity of the set TYPE. */
1494 build_one_cst (tree type
)
1496 switch (TREE_CODE (type
))
1498 case INTEGER_TYPE
: case ENUMERAL_TYPE
: case BOOLEAN_TYPE
:
1499 case POINTER_TYPE
: case REFERENCE_TYPE
:
1501 return build_int_cst (type
, 1);
1504 return build_real (type
, dconst1
);
1506 case FIXED_POINT_TYPE
:
1507 /* We can only generate 1 for accum types. */
1508 gcc_assert (ALL_SCALAR_ACCUM_MODE_P (TYPE_MODE (type
)));
1509 return build_fixed (type
, FCONST1(TYPE_MODE (type
)));
1516 scalar
= build_one_cst (TREE_TYPE (type
));
1518 /* Create 'vect_cst_ = {cst,cst,...,cst}' */
1520 for (i
= TYPE_VECTOR_SUBPARTS (type
); --i
>= 0; )
1521 cst
= tree_cons (NULL_TREE
, scalar
, cst
);
1523 return build_vector (type
, cst
);
1527 return build_complex (type
,
1528 build_one_cst (TREE_TYPE (type
)),
1529 fold_convert (TREE_TYPE (type
), integer_zero_node
));
1536 /* Build a BINFO with LEN language slots. */
1539 make_tree_binfo_stat (unsigned base_binfos MEM_STAT_DECL
)
1542 size_t length
= (offsetof (struct tree_binfo
, base_binfos
)
1543 + VEC_embedded_size (tree
, base_binfos
));
1545 #ifdef GATHER_STATISTICS
1546 tree_node_counts
[(int) binfo_kind
]++;
1547 tree_node_sizes
[(int) binfo_kind
] += length
;
1550 t
= (tree
) ggc_alloc_zone_pass_stat (length
, &tree_zone
);
1552 memset (t
, 0, offsetof (struct tree_binfo
, base_binfos
));
1554 TREE_SET_CODE (t
, TREE_BINFO
);
1556 VEC_embedded_init (tree
, BINFO_BASE_BINFOS (t
), base_binfos
);
1562 /* Build a newly constructed TREE_VEC node of length LEN. */
1565 make_tree_vec_stat (int len MEM_STAT_DECL
)
1568 int length
= (len
- 1) * sizeof (tree
) + sizeof (struct tree_vec
);
1570 #ifdef GATHER_STATISTICS
1571 tree_node_counts
[(int) vec_kind
]++;
1572 tree_node_sizes
[(int) vec_kind
] += length
;
1575 t
= (tree
) ggc_alloc_zone_pass_stat (length
, &tree_zone
);
1577 memset (t
, 0, length
);
1579 TREE_SET_CODE (t
, TREE_VEC
);
1580 TREE_VEC_LENGTH (t
) = len
;
1585 /* Return 1 if EXPR is the integer constant zero or a complex constant
1589 integer_zerop (const_tree expr
)
1593 return ((TREE_CODE (expr
) == INTEGER_CST
1594 && TREE_INT_CST_LOW (expr
) == 0
1595 && TREE_INT_CST_HIGH (expr
) == 0)
1596 || (TREE_CODE (expr
) == COMPLEX_CST
1597 && integer_zerop (TREE_REALPART (expr
))
1598 && integer_zerop (TREE_IMAGPART (expr
))));
1601 /* Return 1 if EXPR is the integer constant one or the corresponding
1602 complex constant. */
1605 integer_onep (const_tree expr
)
1609 return ((TREE_CODE (expr
) == INTEGER_CST
1610 && TREE_INT_CST_LOW (expr
) == 1
1611 && TREE_INT_CST_HIGH (expr
) == 0)
1612 || (TREE_CODE (expr
) == COMPLEX_CST
1613 && integer_onep (TREE_REALPART (expr
))
1614 && integer_zerop (TREE_IMAGPART (expr
))));
1617 /* Return 1 if EXPR is an integer containing all 1's in as much precision as
1618 it contains. Likewise for the corresponding complex constant. */
1621 integer_all_onesp (const_tree expr
)
1628 if (TREE_CODE (expr
) == COMPLEX_CST
1629 && integer_all_onesp (TREE_REALPART (expr
))
1630 && integer_zerop (TREE_IMAGPART (expr
)))
1633 else if (TREE_CODE (expr
) != INTEGER_CST
)
1636 uns
= TYPE_UNSIGNED (TREE_TYPE (expr
));
1637 if (TREE_INT_CST_LOW (expr
) == ~(unsigned HOST_WIDE_INT
) 0
1638 && TREE_INT_CST_HIGH (expr
) == -1)
1643 /* Note that using TYPE_PRECISION here is wrong. We care about the
1644 actual bits, not the (arbitrary) range of the type. */
1645 prec
= GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (expr
)));
1646 if (prec
>= HOST_BITS_PER_WIDE_INT
)
1648 HOST_WIDE_INT high_value
;
1651 shift_amount
= prec
- HOST_BITS_PER_WIDE_INT
;
1653 /* Can not handle precisions greater than twice the host int size. */
1654 gcc_assert (shift_amount
<= HOST_BITS_PER_WIDE_INT
);
1655 if (shift_amount
== HOST_BITS_PER_WIDE_INT
)
1656 /* Shifting by the host word size is undefined according to the ANSI
1657 standard, so we must handle this as a special case. */
1660 high_value
= ((HOST_WIDE_INT
) 1 << shift_amount
) - 1;
1662 return (TREE_INT_CST_LOW (expr
) == ~(unsigned HOST_WIDE_INT
) 0
1663 && TREE_INT_CST_HIGH (expr
) == high_value
);
1666 return TREE_INT_CST_LOW (expr
) == ((unsigned HOST_WIDE_INT
) 1 << prec
) - 1;
1669 /* Return 1 if EXPR is an integer constant that is a power of 2 (i.e., has only
1673 integer_pow2p (const_tree expr
)
1676 HOST_WIDE_INT high
, low
;
1680 if (TREE_CODE (expr
) == COMPLEX_CST
1681 && integer_pow2p (TREE_REALPART (expr
))
1682 && integer_zerop (TREE_IMAGPART (expr
)))
1685 if (TREE_CODE (expr
) != INTEGER_CST
)
1688 prec
= TYPE_PRECISION (TREE_TYPE (expr
));
1689 high
= TREE_INT_CST_HIGH (expr
);
1690 low
= TREE_INT_CST_LOW (expr
);
1692 /* First clear all bits that are beyond the type's precision in case
1693 we've been sign extended. */
1695 if (prec
== 2 * HOST_BITS_PER_WIDE_INT
)
1697 else if (prec
> HOST_BITS_PER_WIDE_INT
)
1698 high
&= ~((HOST_WIDE_INT
) (-1) << (prec
- HOST_BITS_PER_WIDE_INT
));
1702 if (prec
< HOST_BITS_PER_WIDE_INT
)
1703 low
&= ~((HOST_WIDE_INT
) (-1) << prec
);
1706 if (high
== 0 && low
== 0)
1709 return ((high
== 0 && (low
& (low
- 1)) == 0)
1710 || (low
== 0 && (high
& (high
- 1)) == 0));
1713 /* Return 1 if EXPR is an integer constant other than zero or a
1714 complex constant other than zero. */
1717 integer_nonzerop (const_tree expr
)
1721 return ((TREE_CODE (expr
) == INTEGER_CST
1722 && (TREE_INT_CST_LOW (expr
) != 0
1723 || TREE_INT_CST_HIGH (expr
) != 0))
1724 || (TREE_CODE (expr
) == COMPLEX_CST
1725 && (integer_nonzerop (TREE_REALPART (expr
))
1726 || integer_nonzerop (TREE_IMAGPART (expr
)))));
1729 /* Return 1 if EXPR is the fixed-point constant zero. */
1732 fixed_zerop (const_tree expr
)
1734 return (TREE_CODE (expr
) == FIXED_CST
1735 && double_int_zero_p (TREE_FIXED_CST (expr
).data
));
1738 /* Return the power of two represented by a tree node known to be a
1742 tree_log2 (const_tree expr
)
1745 HOST_WIDE_INT high
, low
;
1749 if (TREE_CODE (expr
) == COMPLEX_CST
)
1750 return tree_log2 (TREE_REALPART (expr
));
1752 prec
= TYPE_PRECISION (TREE_TYPE (expr
));
1753 high
= TREE_INT_CST_HIGH (expr
);
1754 low
= TREE_INT_CST_LOW (expr
);
1756 /* First clear all bits that are beyond the type's precision in case
1757 we've been sign extended. */
1759 if (prec
== 2 * HOST_BITS_PER_WIDE_INT
)
1761 else if (prec
> HOST_BITS_PER_WIDE_INT
)
1762 high
&= ~((HOST_WIDE_INT
) (-1) << (prec
- HOST_BITS_PER_WIDE_INT
));
1766 if (prec
< HOST_BITS_PER_WIDE_INT
)
1767 low
&= ~((HOST_WIDE_INT
) (-1) << prec
);
1770 return (high
!= 0 ? HOST_BITS_PER_WIDE_INT
+ exact_log2 (high
)
1771 : exact_log2 (low
));
1774 /* Similar, but return the largest integer Y such that 2 ** Y is less
1775 than or equal to EXPR. */
1778 tree_floor_log2 (const_tree expr
)
1781 HOST_WIDE_INT high
, low
;
1785 if (TREE_CODE (expr
) == COMPLEX_CST
)
1786 return tree_log2 (TREE_REALPART (expr
));
1788 prec
= TYPE_PRECISION (TREE_TYPE (expr
));
1789 high
= TREE_INT_CST_HIGH (expr
);
1790 low
= TREE_INT_CST_LOW (expr
);
1792 /* First clear all bits that are beyond the type's precision in case
1793 we've been sign extended. Ignore if type's precision hasn't been set
1794 since what we are doing is setting it. */
1796 if (prec
== 2 * HOST_BITS_PER_WIDE_INT
|| prec
== 0)
1798 else if (prec
> HOST_BITS_PER_WIDE_INT
)
1799 high
&= ~((HOST_WIDE_INT
) (-1) << (prec
- HOST_BITS_PER_WIDE_INT
));
1803 if (prec
< HOST_BITS_PER_WIDE_INT
)
1804 low
&= ~((HOST_WIDE_INT
) (-1) << prec
);
1807 return (high
!= 0 ? HOST_BITS_PER_WIDE_INT
+ floor_log2 (high
)
1808 : floor_log2 (low
));
1811 /* Return 1 if EXPR is the real constant zero. Trailing zeroes matter for
1812 decimal float constants, so don't return 1 for them. */
1815 real_zerop (const_tree expr
)
1819 return ((TREE_CODE (expr
) == REAL_CST
1820 && REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconst0
)
1821 && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr
)))))
1822 || (TREE_CODE (expr
) == COMPLEX_CST
1823 && real_zerop (TREE_REALPART (expr
))
1824 && real_zerop (TREE_IMAGPART (expr
))));
1827 /* Return 1 if EXPR is the real constant one in real or complex form.
1828 Trailing zeroes matter for decimal float constants, so don't return
1832 real_onep (const_tree expr
)
1836 return ((TREE_CODE (expr
) == REAL_CST
1837 && REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconst1
)
1838 && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr
)))))
1839 || (TREE_CODE (expr
) == COMPLEX_CST
1840 && real_onep (TREE_REALPART (expr
))
1841 && real_zerop (TREE_IMAGPART (expr
))));
1844 /* Return 1 if EXPR is the real constant two. Trailing zeroes matter
1845 for decimal float constants, so don't return 1 for them. */
1848 real_twop (const_tree expr
)
1852 return ((TREE_CODE (expr
) == REAL_CST
1853 && REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconst2
)
1854 && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr
)))))
1855 || (TREE_CODE (expr
) == COMPLEX_CST
1856 && real_twop (TREE_REALPART (expr
))
1857 && real_zerop (TREE_IMAGPART (expr
))));
1860 /* Return 1 if EXPR is the real constant minus one. Trailing zeroes
1861 matter for decimal float constants, so don't return 1 for them. */
1864 real_minus_onep (const_tree expr
)
1868 return ((TREE_CODE (expr
) == REAL_CST
1869 && REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconstm1
)
1870 && !(DECIMAL_FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (expr
)))))
1871 || (TREE_CODE (expr
) == COMPLEX_CST
1872 && real_minus_onep (TREE_REALPART (expr
))
1873 && real_zerop (TREE_IMAGPART (expr
))));
1876 /* Nonzero if EXP is a constant or a cast of a constant. */
1879 really_constant_p (const_tree exp
)
1881 /* This is not quite the same as STRIP_NOPS. It does more. */
1882 while (CONVERT_EXPR_P (exp
)
1883 || TREE_CODE (exp
) == NON_LVALUE_EXPR
)
1884 exp
= TREE_OPERAND (exp
, 0);
1885 return TREE_CONSTANT (exp
);
1888 /* Return first list element whose TREE_VALUE is ELEM.
1889 Return 0 if ELEM is not in LIST. */
1892 value_member (tree elem
, tree list
)
1896 if (elem
== TREE_VALUE (list
))
1898 list
= TREE_CHAIN (list
);
1903 /* Return first list element whose TREE_PURPOSE is ELEM.
1904 Return 0 if ELEM is not in LIST. */
1907 purpose_member (const_tree elem
, tree list
)
1911 if (elem
== TREE_PURPOSE (list
))
1913 list
= TREE_CHAIN (list
);
1918 /* Returns element number IDX (zero-origin) of chain CHAIN, or
1922 chain_index (int idx
, tree chain
)
1924 for (; chain
&& idx
> 0; --idx
)
1925 chain
= TREE_CHAIN (chain
);
1929 /* Return nonzero if ELEM is part of the chain CHAIN. */
1932 chain_member (const_tree elem
, const_tree chain
)
1938 chain
= TREE_CHAIN (chain
);
1944 /* Return the length of a chain of nodes chained through TREE_CHAIN.
1945 We expect a null pointer to mark the end of the chain.
1946 This is the Lisp primitive `length'. */
1949 list_length (const_tree t
)
1952 #ifdef ENABLE_TREE_CHECKING
1960 #ifdef ENABLE_TREE_CHECKING
1963 gcc_assert (p
!= q
);
1971 /* Returns the number of FIELD_DECLs in TYPE. */
1974 fields_length (const_tree type
)
1976 tree t
= TYPE_FIELDS (type
);
1979 for (; t
; t
= TREE_CHAIN (t
))
1980 if (TREE_CODE (t
) == FIELD_DECL
)
1986 /* Returns the first FIELD_DECL in the TYPE_FIELDS of the RECORD_TYPE or
1987 UNION_TYPE TYPE, or NULL_TREE if none. */
1990 first_field (const_tree type
)
1992 tree t
= TYPE_FIELDS (type
);
1993 while (t
&& TREE_CODE (t
) != FIELD_DECL
)
1998 /* Concatenate two chains of nodes (chained through TREE_CHAIN)
1999 by modifying the last node in chain 1 to point to chain 2.
2000 This is the Lisp primitive `nconc'. */
2003 chainon (tree op1
, tree op2
)
2012 for (t1
= op1
; TREE_CHAIN (t1
); t1
= TREE_CHAIN (t1
))
2014 TREE_CHAIN (t1
) = op2
;
2016 #ifdef ENABLE_TREE_CHECKING
2019 for (t2
= op2
; t2
; t2
= TREE_CHAIN (t2
))
2020 gcc_assert (t2
!= t1
);
2027 /* Return the last node in a chain of nodes (chained through TREE_CHAIN). */
2030 tree_last (tree chain
)
2034 while ((next
= TREE_CHAIN (chain
)))
2039 /* Reverse the order of elements in the chain T,
2040 and return the new head of the chain (old last element). */
2045 tree prev
= 0, decl
, next
;
2046 for (decl
= t
; decl
; decl
= next
)
2048 next
= TREE_CHAIN (decl
);
2049 TREE_CHAIN (decl
) = prev
;
2055 /* Return a newly created TREE_LIST node whose
2056 purpose and value fields are PARM and VALUE. */
2059 build_tree_list_stat (tree parm
, tree value MEM_STAT_DECL
)
2061 tree t
= make_node_stat (TREE_LIST PASS_MEM_STAT
);
2062 TREE_PURPOSE (t
) = parm
;
2063 TREE_VALUE (t
) = value
;
2067 /* Build a chain of TREE_LIST nodes from a vector. */
2070 build_tree_list_vec_stat (const VEC(tree
,gc
) *vec MEM_STAT_DECL
)
2072 tree ret
= NULL_TREE
;
2076 for (i
= 0; VEC_iterate (tree
, vec
, i
, t
); ++i
)
2078 *pp
= build_tree_list_stat (NULL
, t PASS_MEM_STAT
);
2079 pp
= &TREE_CHAIN (*pp
);
2084 /* Return a newly created TREE_LIST node whose
2085 purpose and value fields are PURPOSE and VALUE
2086 and whose TREE_CHAIN is CHAIN. */
2089 tree_cons_stat (tree purpose
, tree value
, tree chain MEM_STAT_DECL
)
2093 node
= (tree
) ggc_alloc_zone_pass_stat (sizeof (struct tree_list
), &tree_zone
);
2095 memset (node
, 0, sizeof (struct tree_common
));
2097 #ifdef GATHER_STATISTICS
2098 tree_node_counts
[(int) x_kind
]++;
2099 tree_node_sizes
[(int) x_kind
] += sizeof (struct tree_list
);
2102 TREE_SET_CODE (node
, TREE_LIST
);
2103 TREE_CHAIN (node
) = chain
;
2104 TREE_PURPOSE (node
) = purpose
;
2105 TREE_VALUE (node
) = value
;
2109 /* Return the elements of a CONSTRUCTOR as a TREE_LIST. */
2112 ctor_to_list (tree ctor
)
2114 tree list
= NULL_TREE
;
2119 FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (ctor
), ix
, purpose
, val
)
2121 *p
= build_tree_list (purpose
, val
);
2122 p
= &TREE_CHAIN (*p
);
2128 /* Return the values of the elements of a CONSTRUCTOR as a vector of
2132 ctor_to_vec (tree ctor
)
2134 VEC(tree
, gc
) *vec
= VEC_alloc (tree
, gc
, CONSTRUCTOR_NELTS (ctor
));
2138 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (ctor
), ix
, val
)
2139 VEC_quick_push (tree
, vec
, val
);
2144 /* Return the size nominally occupied by an object of type TYPE
2145 when it resides in memory. The value is measured in units of bytes,
2146 and its data type is that normally used for type sizes
2147 (which is the first type created by make_signed_type or
2148 make_unsigned_type). */
2151 size_in_bytes (const_tree type
)
2155 if (type
== error_mark_node
)
2156 return integer_zero_node
;
2158 type
= TYPE_MAIN_VARIANT (type
);
2159 t
= TYPE_SIZE_UNIT (type
);
2163 lang_hooks
.types
.incomplete_type_error (NULL_TREE
, type
);
2164 return size_zero_node
;
2170 /* Return the size of TYPE (in bytes) as a wide integer
2171 or return -1 if the size can vary or is larger than an integer. */
2174 int_size_in_bytes (const_tree type
)
2178 if (type
== error_mark_node
)
2181 type
= TYPE_MAIN_VARIANT (type
);
2182 t
= TYPE_SIZE_UNIT (type
);
2184 || TREE_CODE (t
) != INTEGER_CST
2185 || TREE_INT_CST_HIGH (t
) != 0
2186 /* If the result would appear negative, it's too big to represent. */
2187 || (HOST_WIDE_INT
) TREE_INT_CST_LOW (t
) < 0)
2190 return TREE_INT_CST_LOW (t
);
2193 /* Return the maximum size of TYPE (in bytes) as a wide integer
2194 or return -1 if the size can vary or is larger than an integer. */
2197 max_int_size_in_bytes (const_tree type
)
2199 HOST_WIDE_INT size
= -1;
2202 /* If this is an array type, check for a possible MAX_SIZE attached. */
2204 if (TREE_CODE (type
) == ARRAY_TYPE
)
2206 size_tree
= TYPE_ARRAY_MAX_SIZE (type
);
2208 if (size_tree
&& host_integerp (size_tree
, 1))
2209 size
= tree_low_cst (size_tree
, 1);
2212 /* If we still haven't been able to get a size, see if the language
2213 can compute a maximum size. */
2217 size_tree
= lang_hooks
.types
.max_size (type
);
2219 if (size_tree
&& host_integerp (size_tree
, 1))
2220 size
= tree_low_cst (size_tree
, 1);
2226 /* Returns a tree for the size of EXP in bytes. */
2229 tree_expr_size (const_tree exp
)
2232 && DECL_SIZE_UNIT (exp
) != 0)
2233 return DECL_SIZE_UNIT (exp
);
2235 return size_in_bytes (TREE_TYPE (exp
));
2238 /* Return the bit position of FIELD, in bits from the start of the record.
2239 This is a tree of type bitsizetype. */
2242 bit_position (const_tree field
)
2244 return bit_from_pos (DECL_FIELD_OFFSET (field
),
2245 DECL_FIELD_BIT_OFFSET (field
));
2248 /* Likewise, but return as an integer. It must be representable in
2249 that way (since it could be a signed value, we don't have the
2250 option of returning -1 like int_size_in_byte can. */
2253 int_bit_position (const_tree field
)
2255 return tree_low_cst (bit_position (field
), 0);
2258 /* Return the byte position of FIELD, in bytes from the start of the record.
2259 This is a tree of type sizetype. */
2262 byte_position (const_tree field
)
2264 return byte_from_pos (DECL_FIELD_OFFSET (field
),
2265 DECL_FIELD_BIT_OFFSET (field
));
2268 /* Likewise, but return as an integer. It must be representable in
2269 that way (since it could be a signed value, we don't have the
2270 option of returning -1 like int_size_in_byte can. */
2273 int_byte_position (const_tree field
)
2275 return tree_low_cst (byte_position (field
), 0);
2278 /* Return the strictest alignment, in bits, that T is known to have. */
2281 expr_align (const_tree t
)
2283 unsigned int align0
, align1
;
2285 switch (TREE_CODE (t
))
2287 CASE_CONVERT
: case NON_LVALUE_EXPR
:
2288 /* If we have conversions, we know that the alignment of the
2289 object must meet each of the alignments of the types. */
2290 align0
= expr_align (TREE_OPERAND (t
, 0));
2291 align1
= TYPE_ALIGN (TREE_TYPE (t
));
2292 return MAX (align0
, align1
);
2294 case SAVE_EXPR
: case COMPOUND_EXPR
: case MODIFY_EXPR
:
2295 case INIT_EXPR
: case TARGET_EXPR
: case WITH_CLEANUP_EXPR
:
2296 case CLEANUP_POINT_EXPR
:
2297 /* These don't change the alignment of an object. */
2298 return expr_align (TREE_OPERAND (t
, 0));
2301 /* The best we can do is say that the alignment is the least aligned
2303 align0
= expr_align (TREE_OPERAND (t
, 1));
2304 align1
= expr_align (TREE_OPERAND (t
, 2));
2305 return MIN (align0
, align1
);
2307 /* FIXME: LABEL_DECL and CONST_DECL never have DECL_ALIGN set
2308 meaningfully, it's always 1. */
2309 case LABEL_DECL
: case CONST_DECL
:
2310 case VAR_DECL
: case PARM_DECL
: case RESULT_DECL
:
2312 gcc_assert (DECL_ALIGN (t
) != 0);
2313 return DECL_ALIGN (t
);
2319 /* Otherwise take the alignment from that of the type. */
2320 return TYPE_ALIGN (TREE_TYPE (t
));
2323 /* Return, as a tree node, the number of elements for TYPE (which is an
2324 ARRAY_TYPE) minus one. This counts only elements of the top array. */
2327 array_type_nelts (const_tree type
)
2329 tree index_type
, min
, max
;
2331 /* If they did it with unspecified bounds, then we should have already
2332 given an error about it before we got here. */
2333 if (! TYPE_DOMAIN (type
))
2334 return error_mark_node
;
2336 index_type
= TYPE_DOMAIN (type
);
2337 min
= TYPE_MIN_VALUE (index_type
);
2338 max
= TYPE_MAX_VALUE (index_type
);
2340 return (integer_zerop (min
)
2342 : fold_build2 (MINUS_EXPR
, TREE_TYPE (max
), max
, min
));
2345 /* If arg is static -- a reference to an object in static storage -- then
2346 return the object. This is not the same as the C meaning of `static'.
2347 If arg isn't static, return NULL. */
2352 switch (TREE_CODE (arg
))
2355 /* Nested functions are static, even though taking their address will
2356 involve a trampoline as we unnest the nested function and create
2357 the trampoline on the tree level. */
2361 return ((TREE_STATIC (arg
) || DECL_EXTERNAL (arg
))
2362 && ! DECL_THREAD_LOCAL_P (arg
)
2363 && ! DECL_DLLIMPORT_P (arg
)
2367 return ((TREE_STATIC (arg
) || DECL_EXTERNAL (arg
))
2371 return TREE_STATIC (arg
) ? arg
: NULL
;
2378 /* If the thing being referenced is not a field, then it is
2379 something language specific. */
2380 gcc_assert (TREE_CODE (TREE_OPERAND (arg
, 1)) == FIELD_DECL
);
2382 /* If we are referencing a bitfield, we can't evaluate an
2383 ADDR_EXPR at compile time and so it isn't a constant. */
2384 if (DECL_BIT_FIELD (TREE_OPERAND (arg
, 1)))
2387 return staticp (TREE_OPERAND (arg
, 0));
2392 case MISALIGNED_INDIRECT_REF
:
2393 case ALIGN_INDIRECT_REF
:
2395 return TREE_CONSTANT (TREE_OPERAND (arg
, 0)) ? arg
: NULL
;
2398 case ARRAY_RANGE_REF
:
2399 if (TREE_CODE (TYPE_SIZE (TREE_TYPE (arg
))) == INTEGER_CST
2400 && TREE_CODE (TREE_OPERAND (arg
, 1)) == INTEGER_CST
)
2401 return staticp (TREE_OPERAND (arg
, 0));
2405 case COMPOUND_LITERAL_EXPR
:
2406 return TREE_STATIC (COMPOUND_LITERAL_EXPR_DECL (arg
)) ? arg
: NULL
;
2416 /* Return whether OP is a DECL whose address is function-invariant. */
2419 decl_address_invariant_p (const_tree op
)
2421 /* The conditions below are slightly less strict than the one in
2424 switch (TREE_CODE (op
))
2433 if (((TREE_STATIC (op
) || DECL_EXTERNAL (op
))
2434 && !DECL_DLLIMPORT_P (op
))
2435 || DECL_THREAD_LOCAL_P (op
)
2436 || DECL_CONTEXT (op
) == current_function_decl
2437 || decl_function_context (op
) == current_function_decl
)
2442 if ((TREE_STATIC (op
) || DECL_EXTERNAL (op
))
2443 || decl_function_context (op
) == current_function_decl
)
2454 /* Return whether OP is a DECL whose address is interprocedural-invariant. */
2457 decl_address_ip_invariant_p (const_tree op
)
2459 /* The conditions below are slightly less strict than the one in
2462 switch (TREE_CODE (op
))
2470 if (((TREE_STATIC (op
) || DECL_EXTERNAL (op
))
2471 && !DECL_DLLIMPORT_P (op
))
2472 || DECL_THREAD_LOCAL_P (op
))
2477 if ((TREE_STATIC (op
) || DECL_EXTERNAL (op
)))
2489 /* Return true if T is function-invariant (internal function, does
2490 not handle arithmetic; that's handled in skip_simple_arithmetic and
2491 tree_invariant_p). */
2493 static bool tree_invariant_p (tree t
);
2496 tree_invariant_p_1 (tree t
)
2500 if (TREE_CONSTANT (t
)
2501 || (TREE_READONLY (t
) && !TREE_SIDE_EFFECTS (t
)))
2504 switch (TREE_CODE (t
))
2510 op
= TREE_OPERAND (t
, 0);
2511 while (handled_component_p (op
))
2513 switch (TREE_CODE (op
))
2516 case ARRAY_RANGE_REF
:
2517 if (!tree_invariant_p (TREE_OPERAND (op
, 1))
2518 || TREE_OPERAND (op
, 2) != NULL_TREE
2519 || TREE_OPERAND (op
, 3) != NULL_TREE
)
2524 if (TREE_OPERAND (op
, 2) != NULL_TREE
)
2530 op
= TREE_OPERAND (op
, 0);
2533 return CONSTANT_CLASS_P (op
) || decl_address_invariant_p (op
);
2542 /* Return true if T is function-invariant. */
2545 tree_invariant_p (tree t
)
2547 tree inner
= skip_simple_arithmetic (t
);
2548 return tree_invariant_p_1 (inner
);
2551 /* Wrap a SAVE_EXPR around EXPR, if appropriate.
2552 Do this to any expression which may be used in more than one place,
2553 but must be evaluated only once.
2555 Normally, expand_expr would reevaluate the expression each time.
2556 Calling save_expr produces something that is evaluated and recorded
2557 the first time expand_expr is called on it. Subsequent calls to
2558 expand_expr just reuse the recorded value.
2560 The call to expand_expr that generates code that actually computes
2561 the value is the first call *at compile time*. Subsequent calls
2562 *at compile time* generate code to use the saved value.
2563 This produces correct result provided that *at run time* control
2564 always flows through the insns made by the first expand_expr
2565 before reaching the other places where the save_expr was evaluated.
2566 You, the caller of save_expr, must make sure this is so.
2568 Constants, and certain read-only nodes, are returned with no
2569 SAVE_EXPR because that is safe. Expressions containing placeholders
2570 are not touched; see tree.def for an explanation of what these
2574 save_expr (tree expr
)
2576 tree t
= fold (expr
);
2579 /* If the tree evaluates to a constant, then we don't want to hide that
2580 fact (i.e. this allows further folding, and direct checks for constants).
2581 However, a read-only object that has side effects cannot be bypassed.
2582 Since it is no problem to reevaluate literals, we just return the
2584 inner
= skip_simple_arithmetic (t
);
2585 if (TREE_CODE (inner
) == ERROR_MARK
)
2588 if (tree_invariant_p_1 (inner
))
2591 /* If INNER contains a PLACEHOLDER_EXPR, we must evaluate it each time, since
2592 it means that the size or offset of some field of an object depends on
2593 the value within another field.
2595 Note that it must not be the case that T contains both a PLACEHOLDER_EXPR
2596 and some variable since it would then need to be both evaluated once and
2597 evaluated more than once. Front-ends must assure this case cannot
2598 happen by surrounding any such subexpressions in their own SAVE_EXPR
2599 and forcing evaluation at the proper time. */
2600 if (contains_placeholder_p (inner
))
2603 t
= build1 (SAVE_EXPR
, TREE_TYPE (expr
), t
);
2604 SET_EXPR_LOCATION (t
, EXPR_LOCATION (expr
));
2606 /* This expression might be placed ahead of a jump to ensure that the
2607 value was computed on both sides of the jump. So make sure it isn't
2608 eliminated as dead. */
2609 TREE_SIDE_EFFECTS (t
) = 1;
2613 /* Look inside EXPR and into any simple arithmetic operations. Return
2614 the innermost non-arithmetic node. */
2617 skip_simple_arithmetic (tree expr
)
2621 /* We don't care about whether this can be used as an lvalue in this
2623 while (TREE_CODE (expr
) == NON_LVALUE_EXPR
)
2624 expr
= TREE_OPERAND (expr
, 0);
2626 /* If we have simple operations applied to a SAVE_EXPR or to a SAVE_EXPR and
2627 a constant, it will be more efficient to not make another SAVE_EXPR since
2628 it will allow better simplification and GCSE will be able to merge the
2629 computations if they actually occur. */
2633 if (UNARY_CLASS_P (inner
))
2634 inner
= TREE_OPERAND (inner
, 0);
2635 else if (BINARY_CLASS_P (inner
))
2637 if (tree_invariant_p (TREE_OPERAND (inner
, 1)))
2638 inner
= TREE_OPERAND (inner
, 0);
2639 else if (tree_invariant_p (TREE_OPERAND (inner
, 0)))
2640 inner
= TREE_OPERAND (inner
, 1);
2652 /* Return which tree structure is used by T. */
2654 enum tree_node_structure_enum
2655 tree_node_structure (const_tree t
)
2657 const enum tree_code code
= TREE_CODE (t
);
2658 return tree_node_structure_for_code (code
);
2661 /* Set various status flags when building a CALL_EXPR object T. */
2664 process_call_operands (tree t
)
2666 bool side_effects
= TREE_SIDE_EFFECTS (t
);
2667 bool read_only
= false;
2668 int i
= call_expr_flags (t
);
2670 /* Calls have side-effects, except those to const or pure functions. */
2671 if ((i
& ECF_LOOPING_CONST_OR_PURE
) || !(i
& (ECF_CONST
| ECF_PURE
)))
2672 side_effects
= true;
2673 /* Propagate TREE_READONLY of arguments for const functions. */
2677 if (!side_effects
|| read_only
)
2678 for (i
= 1; i
< TREE_OPERAND_LENGTH (t
); i
++)
2680 tree op
= TREE_OPERAND (t
, i
);
2681 if (op
&& TREE_SIDE_EFFECTS (op
))
2682 side_effects
= true;
2683 if (op
&& !TREE_READONLY (op
) && !CONSTANT_CLASS_P (op
))
2687 TREE_SIDE_EFFECTS (t
) = side_effects
;
2688 TREE_READONLY (t
) = read_only
;
2691 /* Return 1 if EXP contains a PLACEHOLDER_EXPR; i.e., if it represents a size
2692 or offset that depends on a field within a record. */
2695 contains_placeholder_p (const_tree exp
)
2697 enum tree_code code
;
2702 code
= TREE_CODE (exp
);
2703 if (code
== PLACEHOLDER_EXPR
)
2706 switch (TREE_CODE_CLASS (code
))
2709 /* Don't look at any PLACEHOLDER_EXPRs that might be in index or bit
2710 position computations since they will be converted into a
2711 WITH_RECORD_EXPR involving the reference, which will assume
2712 here will be valid. */
2713 return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0));
2715 case tcc_exceptional
:
2716 if (code
== TREE_LIST
)
2717 return (CONTAINS_PLACEHOLDER_P (TREE_VALUE (exp
))
2718 || CONTAINS_PLACEHOLDER_P (TREE_CHAIN (exp
)));
2723 case tcc_comparison
:
2724 case tcc_expression
:
2728 /* Ignoring the first operand isn't quite right, but works best. */
2729 return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 1));
2732 return (CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0))
2733 || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 1))
2734 || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 2)));
2737 /* The save_expr function never wraps anything containing
2738 a PLACEHOLDER_EXPR. */
2745 switch (TREE_CODE_LENGTH (code
))
2748 return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0));
2750 return (CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0))
2751 || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 1)));
2762 const_call_expr_arg_iterator iter
;
2763 FOR_EACH_CONST_CALL_EXPR_ARG (arg
, iter
, exp
)
2764 if (CONTAINS_PLACEHOLDER_P (arg
))
2778 /* Return true if any part of the computation of TYPE involves a
2779 PLACEHOLDER_EXPR. This includes size, bounds, qualifiers
2780 (for QUAL_UNION_TYPE) and field positions. */
2783 type_contains_placeholder_1 (const_tree type
)
2785 /* If the size contains a placeholder or the parent type (component type in
2786 the case of arrays) type involves a placeholder, this type does. */
2787 if (CONTAINS_PLACEHOLDER_P (TYPE_SIZE (type
))
2788 || CONTAINS_PLACEHOLDER_P (TYPE_SIZE_UNIT (type
))
2789 || (TREE_TYPE (type
) != 0
2790 && type_contains_placeholder_p (TREE_TYPE (type
))))
2793 /* Now do type-specific checks. Note that the last part of the check above
2794 greatly limits what we have to do below. */
2795 switch (TREE_CODE (type
))
2803 case REFERENCE_TYPE
:
2811 case FIXED_POINT_TYPE
:
2812 /* Here we just check the bounds. */
2813 return (CONTAINS_PLACEHOLDER_P (TYPE_MIN_VALUE (type
))
2814 || CONTAINS_PLACEHOLDER_P (TYPE_MAX_VALUE (type
)));
2817 /* We're already checked the component type (TREE_TYPE), so just check
2819 return type_contains_placeholder_p (TYPE_DOMAIN (type
));
2823 case QUAL_UNION_TYPE
:
2827 for (field
= TYPE_FIELDS (type
); field
; field
= TREE_CHAIN (field
))
2828 if (TREE_CODE (field
) == FIELD_DECL
2829 && (CONTAINS_PLACEHOLDER_P (DECL_FIELD_OFFSET (field
))
2830 || (TREE_CODE (type
) == QUAL_UNION_TYPE
2831 && CONTAINS_PLACEHOLDER_P (DECL_QUALIFIER (field
)))
2832 || type_contains_placeholder_p (TREE_TYPE (field
))))
2844 type_contains_placeholder_p (tree type
)
2848 /* If the contains_placeholder_bits field has been initialized,
2849 then we know the answer. */
2850 if (TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) > 0)
2851 return TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) - 1;
2853 /* Indicate that we've seen this type node, and the answer is false.
2854 This is what we want to return if we run into recursion via fields. */
2855 TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) = 1;
2857 /* Compute the real value. */
2858 result
= type_contains_placeholder_1 (type
);
2860 /* Store the real value. */
2861 TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) = result
+ 1;
2866 /* Push tree EXP onto vector QUEUE if it is not already present. */
2869 push_without_duplicates (tree exp
, VEC (tree
, heap
) **queue
)
2874 for (i
= 0; VEC_iterate (tree
, *queue
, i
, iter
); i
++)
2875 if (simple_cst_equal (iter
, exp
) == 1)
2879 VEC_safe_push (tree
, heap
, *queue
, exp
);
2882 /* Given a tree EXP, find all occurences of references to fields
2883 in a PLACEHOLDER_EXPR and place them in vector REFS without
2884 duplicates. Also record VAR_DECLs and CONST_DECLs. Note that
2885 we assume here that EXP contains only arithmetic expressions
2886 or CALL_EXPRs with PLACEHOLDER_EXPRs occurring only in their
2890 find_placeholder_in_expr (tree exp
, VEC (tree
, heap
) **refs
)
2892 enum tree_code code
= TREE_CODE (exp
);
2896 /* We handle TREE_LIST and COMPONENT_REF separately. */
2897 if (code
== TREE_LIST
)
2899 FIND_PLACEHOLDER_IN_EXPR (TREE_CHAIN (exp
), refs
);
2900 FIND_PLACEHOLDER_IN_EXPR (TREE_VALUE (exp
), refs
);
2902 else if (code
== COMPONENT_REF
)
2904 for (inner
= TREE_OPERAND (exp
, 0);
2905 REFERENCE_CLASS_P (inner
);
2906 inner
= TREE_OPERAND (inner
, 0))
2909 if (TREE_CODE (inner
) == PLACEHOLDER_EXPR
)
2910 push_without_duplicates (exp
, refs
);
2912 FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), refs
);
2915 switch (TREE_CODE_CLASS (code
))
2920 case tcc_declaration
:
2921 /* Variables allocated to static storage can stay. */
2922 if (!TREE_STATIC (exp
))
2923 push_without_duplicates (exp
, refs
);
2926 case tcc_expression
:
2927 /* This is the pattern built in ada/make_aligning_type. */
2928 if (code
== ADDR_EXPR
2929 && TREE_CODE (TREE_OPERAND (exp
, 0)) == PLACEHOLDER_EXPR
)
2931 push_without_duplicates (exp
, refs
);
2935 /* Fall through... */
2937 case tcc_exceptional
:
2940 case tcc_comparison
:
2942 for (i
= 0; i
< TREE_CODE_LENGTH (code
); i
++)
2943 FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, i
), refs
);
2947 for (i
= 1; i
< TREE_OPERAND_LENGTH (exp
); i
++)
2948 FIND_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, i
), refs
);
2956 /* Given a tree EXP, a FIELD_DECL F, and a replacement value R,
2957 return a tree with all occurrences of references to F in a
2958 PLACEHOLDER_EXPR replaced by R. Also handle VAR_DECLs and
2959 CONST_DECLs. Note that we assume here that EXP contains only
2960 arithmetic expressions or CALL_EXPRs with PLACEHOLDER_EXPRs
2961 occurring only in their argument list. */
2964 substitute_in_expr (tree exp
, tree f
, tree r
)
2966 enum tree_code code
= TREE_CODE (exp
);
2967 tree op0
, op1
, op2
, op3
;
2970 /* We handle TREE_LIST and COMPONENT_REF separately. */
2971 if (code
== TREE_LIST
)
2973 op0
= SUBSTITUTE_IN_EXPR (TREE_CHAIN (exp
), f
, r
);
2974 op1
= SUBSTITUTE_IN_EXPR (TREE_VALUE (exp
), f
, r
);
2975 if (op0
== TREE_CHAIN (exp
) && op1
== TREE_VALUE (exp
))
2978 return tree_cons (TREE_PURPOSE (exp
), op1
, op0
);
2980 else if (code
== COMPONENT_REF
)
2984 /* If this expression is getting a value from a PLACEHOLDER_EXPR
2985 and it is the right field, replace it with R. */
2986 for (inner
= TREE_OPERAND (exp
, 0);
2987 REFERENCE_CLASS_P (inner
);
2988 inner
= TREE_OPERAND (inner
, 0))
2992 op1
= TREE_OPERAND (exp
, 1);
2994 if (TREE_CODE (inner
) == PLACEHOLDER_EXPR
&& op1
== f
)
2997 /* If this expression hasn't been completed let, leave it alone. */
2998 if (TREE_CODE (inner
) == PLACEHOLDER_EXPR
&& !TREE_TYPE (inner
))
3001 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3002 if (op0
== TREE_OPERAND (exp
, 0))
3006 = fold_build3 (COMPONENT_REF
, TREE_TYPE (exp
), op0
, op1
, NULL_TREE
);
3009 switch (TREE_CODE_CLASS (code
))
3014 case tcc_declaration
:
3020 case tcc_expression
:
3024 /* Fall through... */
3026 case tcc_exceptional
:
3029 case tcc_comparison
:
3031 switch (TREE_CODE_LENGTH (code
))
3037 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3038 if (op0
== TREE_OPERAND (exp
, 0))
3041 new_tree
= fold_build1 (code
, TREE_TYPE (exp
), op0
);
3045 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3046 op1
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 1), f
, r
);
3048 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1))
3051 new_tree
= fold_build2 (code
, TREE_TYPE (exp
), op0
, op1
);
3055 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3056 op1
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 1), f
, r
);
3057 op2
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 2), f
, r
);
3059 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3060 && op2
== TREE_OPERAND (exp
, 2))
3063 new_tree
= fold_build3 (code
, TREE_TYPE (exp
), op0
, op1
, op2
);
3067 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
3068 op1
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 1), f
, r
);
3069 op2
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 2), f
, r
);
3070 op3
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 3), f
, r
);
3072 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3073 && op2
== TREE_OPERAND (exp
, 2)
3074 && op3
== TREE_OPERAND (exp
, 3))
3078 = fold (build4 (code
, TREE_TYPE (exp
), op0
, op1
, op2
, op3
));
3090 new_tree
= NULL_TREE
;
3092 /* If we are trying to replace F with a constant, inline back
3093 functions which do nothing else than computing a value from
3094 the arguments they are passed. This makes it possible to
3095 fold partially or entirely the replacement expression. */
3096 if (CONSTANT_CLASS_P (r
) && code
== CALL_EXPR
)
3098 tree t
= maybe_inline_call_in_expr (exp
);
3100 return SUBSTITUTE_IN_EXPR (t
, f
, r
);
3103 for (i
= 1; i
< TREE_OPERAND_LENGTH (exp
); i
++)
3105 tree op
= TREE_OPERAND (exp
, i
);
3106 tree new_op
= SUBSTITUTE_IN_EXPR (op
, f
, r
);
3110 new_tree
= copy_node (exp
);
3111 TREE_OPERAND (new_tree
, i
) = new_op
;
3117 new_tree
= fold (new_tree
);
3118 if (TREE_CODE (new_tree
) == CALL_EXPR
)
3119 process_call_operands (new_tree
);
3130 TREE_READONLY (new_tree
) |= TREE_READONLY (exp
);
3134 /* Similar, but look for a PLACEHOLDER_EXPR in EXP and find a replacement
3135 for it within OBJ, a tree that is an object or a chain of references. */
3138 substitute_placeholder_in_expr (tree exp
, tree obj
)
3140 enum tree_code code
= TREE_CODE (exp
);
3141 tree op0
, op1
, op2
, op3
;
3144 /* If this is a PLACEHOLDER_EXPR, see if we find a corresponding type
3145 in the chain of OBJ. */
3146 if (code
== PLACEHOLDER_EXPR
)
3148 tree need_type
= TYPE_MAIN_VARIANT (TREE_TYPE (exp
));
3151 for (elt
= obj
; elt
!= 0;
3152 elt
= ((TREE_CODE (elt
) == COMPOUND_EXPR
3153 || TREE_CODE (elt
) == COND_EXPR
)
3154 ? TREE_OPERAND (elt
, 1)
3155 : (REFERENCE_CLASS_P (elt
)
3156 || UNARY_CLASS_P (elt
)
3157 || BINARY_CLASS_P (elt
)
3158 || VL_EXP_CLASS_P (elt
)
3159 || EXPRESSION_CLASS_P (elt
))
3160 ? TREE_OPERAND (elt
, 0) : 0))
3161 if (TYPE_MAIN_VARIANT (TREE_TYPE (elt
)) == need_type
)
3164 for (elt
= obj
; elt
!= 0;
3165 elt
= ((TREE_CODE (elt
) == COMPOUND_EXPR
3166 || TREE_CODE (elt
) == COND_EXPR
)
3167 ? TREE_OPERAND (elt
, 1)
3168 : (REFERENCE_CLASS_P (elt
)
3169 || UNARY_CLASS_P (elt
)
3170 || BINARY_CLASS_P (elt
)
3171 || VL_EXP_CLASS_P (elt
)
3172 || EXPRESSION_CLASS_P (elt
))
3173 ? TREE_OPERAND (elt
, 0) : 0))
3174 if (POINTER_TYPE_P (TREE_TYPE (elt
))
3175 && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (elt
)))
3177 return fold_build1 (INDIRECT_REF
, need_type
, elt
);
3179 /* If we didn't find it, return the original PLACEHOLDER_EXPR. If it
3180 survives until RTL generation, there will be an error. */
3184 /* TREE_LIST is special because we need to look at TREE_VALUE
3185 and TREE_CHAIN, not TREE_OPERANDS. */
3186 else if (code
== TREE_LIST
)
3188 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_CHAIN (exp
), obj
);
3189 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_VALUE (exp
), obj
);
3190 if (op0
== TREE_CHAIN (exp
) && op1
== TREE_VALUE (exp
))
3193 return tree_cons (TREE_PURPOSE (exp
), op1
, op0
);
3196 switch (TREE_CODE_CLASS (code
))
3199 case tcc_declaration
:
3202 case tcc_exceptional
:
3205 case tcc_comparison
:
3206 case tcc_expression
:
3209 switch (TREE_CODE_LENGTH (code
))
3215 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
3216 if (op0
== TREE_OPERAND (exp
, 0))
3219 new_tree
= fold_build1 (code
, TREE_TYPE (exp
), op0
);
3223 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
3224 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 1), obj
);
3226 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1))
3229 new_tree
= fold_build2 (code
, TREE_TYPE (exp
), op0
, op1
);
3233 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
3234 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 1), obj
);
3235 op2
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 2), obj
);
3237 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3238 && op2
== TREE_OPERAND (exp
, 2))
3241 new_tree
= fold_build3 (code
, TREE_TYPE (exp
), op0
, op1
, op2
);
3245 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
3246 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 1), obj
);
3247 op2
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 2), obj
);
3248 op3
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 3), obj
);
3250 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
3251 && op2
== TREE_OPERAND (exp
, 2)
3252 && op3
== TREE_OPERAND (exp
, 3))
3256 = fold (build4 (code
, TREE_TYPE (exp
), op0
, op1
, op2
, op3
));
3268 new_tree
= NULL_TREE
;
3270 for (i
= 1; i
< TREE_OPERAND_LENGTH (exp
); i
++)
3272 tree op
= TREE_OPERAND (exp
, i
);
3273 tree new_op
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (op
, obj
);
3277 new_tree
= copy_node (exp
);
3278 TREE_OPERAND (new_tree
, i
) = new_op
;
3284 new_tree
= fold (new_tree
);
3285 if (TREE_CODE (new_tree
) == CALL_EXPR
)
3286 process_call_operands (new_tree
);
3297 TREE_READONLY (new_tree
) |= TREE_READONLY (exp
);
3301 /* Stabilize a reference so that we can use it any number of times
3302 without causing its operands to be evaluated more than once.
3303 Returns the stabilized reference. This works by means of save_expr,
3304 so see the caveats in the comments about save_expr.
3306 Also allows conversion expressions whose operands are references.
3307 Any other kind of expression is returned unchanged. */
3310 stabilize_reference (tree ref
)
3313 enum tree_code code
= TREE_CODE (ref
);
3320 /* No action is needed in this case. */
3325 case FIX_TRUNC_EXPR
:
3326 result
= build_nt (code
, stabilize_reference (TREE_OPERAND (ref
, 0)));
3330 result
= build_nt (INDIRECT_REF
,
3331 stabilize_reference_1 (TREE_OPERAND (ref
, 0)));
3335 result
= build_nt (COMPONENT_REF
,
3336 stabilize_reference (TREE_OPERAND (ref
, 0)),
3337 TREE_OPERAND (ref
, 1), NULL_TREE
);
3341 result
= build_nt (BIT_FIELD_REF
,
3342 stabilize_reference (TREE_OPERAND (ref
, 0)),
3343 stabilize_reference_1 (TREE_OPERAND (ref
, 1)),
3344 stabilize_reference_1 (TREE_OPERAND (ref
, 2)));
3348 result
= build_nt (ARRAY_REF
,
3349 stabilize_reference (TREE_OPERAND (ref
, 0)),
3350 stabilize_reference_1 (TREE_OPERAND (ref
, 1)),
3351 TREE_OPERAND (ref
, 2), TREE_OPERAND (ref
, 3));
3354 case ARRAY_RANGE_REF
:
3355 result
= build_nt (ARRAY_RANGE_REF
,
3356 stabilize_reference (TREE_OPERAND (ref
, 0)),
3357 stabilize_reference_1 (TREE_OPERAND (ref
, 1)),
3358 TREE_OPERAND (ref
, 2), TREE_OPERAND (ref
, 3));
3362 /* We cannot wrap the first expression in a SAVE_EXPR, as then
3363 it wouldn't be ignored. This matters when dealing with
3365 return stabilize_reference_1 (ref
);
3367 /* If arg isn't a kind of lvalue we recognize, make no change.
3368 Caller should recognize the error for an invalid lvalue. */
3373 return error_mark_node
;
3376 TREE_TYPE (result
) = TREE_TYPE (ref
);
3377 TREE_READONLY (result
) = TREE_READONLY (ref
);
3378 TREE_SIDE_EFFECTS (result
) = TREE_SIDE_EFFECTS (ref
);
3379 TREE_THIS_VOLATILE (result
) = TREE_THIS_VOLATILE (ref
);
3384 /* Subroutine of stabilize_reference; this is called for subtrees of
3385 references. Any expression with side-effects must be put in a SAVE_EXPR
3386 to ensure that it is only evaluated once.
3388 We don't put SAVE_EXPR nodes around everything, because assigning very
3389 simple expressions to temporaries causes us to miss good opportunities
3390 for optimizations. Among other things, the opportunity to fold in the
3391 addition of a constant into an addressing mode often gets lost, e.g.
3392 "y[i+1] += x;". In general, we take the approach that we should not make
3393 an assignment unless we are forced into it - i.e., that any non-side effect
3394 operator should be allowed, and that cse should take care of coalescing
3395 multiple utterances of the same expression should that prove fruitful. */
3398 stabilize_reference_1 (tree e
)
3401 enum tree_code code
= TREE_CODE (e
);
3403 /* We cannot ignore const expressions because it might be a reference
3404 to a const array but whose index contains side-effects. But we can
3405 ignore things that are actual constant or that already have been
3406 handled by this function. */
3408 if (tree_invariant_p (e
))
3411 switch (TREE_CODE_CLASS (code
))
3413 case tcc_exceptional
:
3415 case tcc_declaration
:
3416 case tcc_comparison
:
3418 case tcc_expression
:
3421 /* If the expression has side-effects, then encase it in a SAVE_EXPR
3422 so that it will only be evaluated once. */
3423 /* The reference (r) and comparison (<) classes could be handled as
3424 below, but it is generally faster to only evaluate them once. */
3425 if (TREE_SIDE_EFFECTS (e
))
3426 return save_expr (e
);
3430 /* Constants need no processing. In fact, we should never reach
3435 /* Division is slow and tends to be compiled with jumps,
3436 especially the division by powers of 2 that is often
3437 found inside of an array reference. So do it just once. */
3438 if (code
== TRUNC_DIV_EXPR
|| code
== TRUNC_MOD_EXPR
3439 || code
== FLOOR_DIV_EXPR
|| code
== FLOOR_MOD_EXPR
3440 || code
== CEIL_DIV_EXPR
|| code
== CEIL_MOD_EXPR
3441 || code
== ROUND_DIV_EXPR
|| code
== ROUND_MOD_EXPR
)
3442 return save_expr (e
);
3443 /* Recursively stabilize each operand. */
3444 result
= build_nt (code
, stabilize_reference_1 (TREE_OPERAND (e
, 0)),
3445 stabilize_reference_1 (TREE_OPERAND (e
, 1)));
3449 /* Recursively stabilize each operand. */
3450 result
= build_nt (code
, stabilize_reference_1 (TREE_OPERAND (e
, 0)));
3457 TREE_TYPE (result
) = TREE_TYPE (e
);
3458 TREE_READONLY (result
) = TREE_READONLY (e
);
3459 TREE_SIDE_EFFECTS (result
) = TREE_SIDE_EFFECTS (e
);
3460 TREE_THIS_VOLATILE (result
) = TREE_THIS_VOLATILE (e
);
3465 /* Low-level constructors for expressions. */
3467 /* A helper function for build1 and constant folders. Set TREE_CONSTANT,
3468 and TREE_SIDE_EFFECTS for an ADDR_EXPR. */
3471 recompute_tree_invariant_for_addr_expr (tree t
)
3474 bool tc
= true, se
= false;
3476 /* We started out assuming this address is both invariant and constant, but
3477 does not have side effects. Now go down any handled components and see if
3478 any of them involve offsets that are either non-constant or non-invariant.
3479 Also check for side-effects.
3481 ??? Note that this code makes no attempt to deal with the case where
3482 taking the address of something causes a copy due to misalignment. */
3484 #define UPDATE_FLAGS(NODE) \
3485 do { tree _node = (NODE); \
3486 if (_node && !TREE_CONSTANT (_node)) tc = false; \
3487 if (_node && TREE_SIDE_EFFECTS (_node)) se = true; } while (0)
3489 for (node
= TREE_OPERAND (t
, 0); handled_component_p (node
);
3490 node
= TREE_OPERAND (node
, 0))
3492 /* If the first operand doesn't have an ARRAY_TYPE, this is a bogus
3493 array reference (probably made temporarily by the G++ front end),
3494 so ignore all the operands. */
3495 if ((TREE_CODE (node
) == ARRAY_REF
3496 || TREE_CODE (node
) == ARRAY_RANGE_REF
)
3497 && TREE_CODE (TREE_TYPE (TREE_OPERAND (node
, 0))) == ARRAY_TYPE
)
3499 UPDATE_FLAGS (TREE_OPERAND (node
, 1));
3500 if (TREE_OPERAND (node
, 2))
3501 UPDATE_FLAGS (TREE_OPERAND (node
, 2));
3502 if (TREE_OPERAND (node
, 3))
3503 UPDATE_FLAGS (TREE_OPERAND (node
, 3));
3505 /* Likewise, just because this is a COMPONENT_REF doesn't mean we have a
3506 FIELD_DECL, apparently. The G++ front end can put something else
3507 there, at least temporarily. */
3508 else if (TREE_CODE (node
) == COMPONENT_REF
3509 && TREE_CODE (TREE_OPERAND (node
, 1)) == FIELD_DECL
)
3511 if (TREE_OPERAND (node
, 2))
3512 UPDATE_FLAGS (TREE_OPERAND (node
, 2));
3514 else if (TREE_CODE (node
) == BIT_FIELD_REF
)
3515 UPDATE_FLAGS (TREE_OPERAND (node
, 2));
3518 node
= lang_hooks
.expr_to_decl (node
, &tc
, &se
);
3520 /* Now see what's inside. If it's an INDIRECT_REF, copy our properties from
3521 the address, since &(*a)->b is a form of addition. If it's a constant, the
3522 address is constant too. If it's a decl, its address is constant if the
3523 decl is static. Everything else is not constant and, furthermore,
3524 taking the address of a volatile variable is not volatile. */
3525 if (TREE_CODE (node
) == INDIRECT_REF
)
3526 UPDATE_FLAGS (TREE_OPERAND (node
, 0));
3527 else if (CONSTANT_CLASS_P (node
))
3529 else if (DECL_P (node
))
3530 tc
&= (staticp (node
) != NULL_TREE
);
3534 se
|= TREE_SIDE_EFFECTS (node
);
3538 TREE_CONSTANT (t
) = tc
;
3539 TREE_SIDE_EFFECTS (t
) = se
;
3543 /* Build an expression of code CODE, data type TYPE, and operands as
3544 specified. Expressions and reference nodes can be created this way.
3545 Constants, decls, types and misc nodes cannot be.
3547 We define 5 non-variadic functions, from 0 to 4 arguments. This is
3548 enough for all extant tree codes. */
3551 build0_stat (enum tree_code code
, tree tt MEM_STAT_DECL
)
3555 gcc_assert (TREE_CODE_LENGTH (code
) == 0);
3557 t
= make_node_stat (code PASS_MEM_STAT
);
3564 build1_stat (enum tree_code code
, tree type
, tree node MEM_STAT_DECL
)
3566 int length
= sizeof (struct tree_exp
);
3567 #ifdef GATHER_STATISTICS
3568 tree_node_kind kind
;
3572 #ifdef GATHER_STATISTICS
3573 switch (TREE_CODE_CLASS (code
))
3575 case tcc_statement
: /* an expression with side effects */
3578 case tcc_reference
: /* a reference */
3586 tree_node_counts
[(int) kind
]++;
3587 tree_node_sizes
[(int) kind
] += length
;
3590 gcc_assert (TREE_CODE_LENGTH (code
) == 1);
3592 t
= (tree
) ggc_alloc_zone_pass_stat (length
, &tree_zone
);
3594 memset (t
, 0, sizeof (struct tree_common
));
3596 TREE_SET_CODE (t
, code
);
3598 TREE_TYPE (t
) = type
;
3599 SET_EXPR_LOCATION (t
, UNKNOWN_LOCATION
);
3600 TREE_OPERAND (t
, 0) = node
;
3601 TREE_BLOCK (t
) = NULL_TREE
;
3602 if (node
&& !TYPE_P (node
))
3604 TREE_SIDE_EFFECTS (t
) = TREE_SIDE_EFFECTS (node
);
3605 TREE_READONLY (t
) = TREE_READONLY (node
);
3608 if (TREE_CODE_CLASS (code
) == tcc_statement
)
3609 TREE_SIDE_EFFECTS (t
) = 1;
3613 /* All of these have side-effects, no matter what their
3615 TREE_SIDE_EFFECTS (t
) = 1;
3616 TREE_READONLY (t
) = 0;
3619 case MISALIGNED_INDIRECT_REF
:
3620 case ALIGN_INDIRECT_REF
:
3622 /* Whether a dereference is readonly has nothing to do with whether
3623 its operand is readonly. */
3624 TREE_READONLY (t
) = 0;
3629 recompute_tree_invariant_for_addr_expr (t
);
3633 if ((TREE_CODE_CLASS (code
) == tcc_unary
|| code
== VIEW_CONVERT_EXPR
)
3634 && node
&& !TYPE_P (node
)
3635 && TREE_CONSTANT (node
))
3636 TREE_CONSTANT (t
) = 1;
3637 if (TREE_CODE_CLASS (code
) == tcc_reference
3638 && node
&& TREE_THIS_VOLATILE (node
))
3639 TREE_THIS_VOLATILE (t
) = 1;
3646 #define PROCESS_ARG(N) \
3648 TREE_OPERAND (t, N) = arg##N; \
3649 if (arg##N &&!TYPE_P (arg##N)) \
3651 if (TREE_SIDE_EFFECTS (arg##N)) \
3653 if (!TREE_READONLY (arg##N) \
3654 && !CONSTANT_CLASS_P (arg##N)) \
3656 if (!TREE_CONSTANT (arg##N)) \
3662 build2_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1 MEM_STAT_DECL
)
3664 bool constant
, read_only
, side_effects
;
3667 gcc_assert (TREE_CODE_LENGTH (code
) == 2);
3669 if ((code
== MINUS_EXPR
|| code
== PLUS_EXPR
|| code
== MULT_EXPR
)
3670 && arg0
&& arg1
&& tt
&& POINTER_TYPE_P (tt
)
3671 /* When sizetype precision doesn't match that of pointers
3672 we need to be able to build explicit extensions or truncations
3673 of the offset argument. */
3674 && TYPE_PRECISION (sizetype
) == TYPE_PRECISION (tt
))
3675 gcc_assert (TREE_CODE (arg0
) == INTEGER_CST
3676 && TREE_CODE (arg1
) == INTEGER_CST
);
3678 if (code
== POINTER_PLUS_EXPR
&& arg0
&& arg1
&& tt
)
3679 gcc_assert (POINTER_TYPE_P (tt
) && POINTER_TYPE_P (TREE_TYPE (arg0
))
3680 && INTEGRAL_TYPE_P (TREE_TYPE (arg1
))
3681 && useless_type_conversion_p (sizetype
, TREE_TYPE (arg1
)));
3683 t
= make_node_stat (code PASS_MEM_STAT
);
3686 /* Below, we automatically set TREE_SIDE_EFFECTS and TREE_READONLY for the
3687 result based on those same flags for the arguments. But if the
3688 arguments aren't really even `tree' expressions, we shouldn't be trying
3691 /* Expressions without side effects may be constant if their
3692 arguments are as well. */
3693 constant
= (TREE_CODE_CLASS (code
) == tcc_comparison
3694 || TREE_CODE_CLASS (code
) == tcc_binary
);
3696 side_effects
= TREE_SIDE_EFFECTS (t
);
3701 TREE_READONLY (t
) = read_only
;
3702 TREE_CONSTANT (t
) = constant
;
3703 TREE_SIDE_EFFECTS (t
) = side_effects
;
3704 TREE_THIS_VOLATILE (t
)
3705 = (TREE_CODE_CLASS (code
) == tcc_reference
3706 && arg0
&& TREE_THIS_VOLATILE (arg0
));
3713 build3_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
3714 tree arg2 MEM_STAT_DECL
)
3716 bool constant
, read_only
, side_effects
;
3719 gcc_assert (TREE_CODE_LENGTH (code
) == 3);
3720 gcc_assert (TREE_CODE_CLASS (code
) != tcc_vl_exp
);
3722 t
= make_node_stat (code PASS_MEM_STAT
);
3727 /* As a special exception, if COND_EXPR has NULL branches, we
3728 assume that it is a gimple statement and always consider
3729 it to have side effects. */
3730 if (code
== COND_EXPR
3731 && tt
== void_type_node
3732 && arg1
== NULL_TREE
3733 && arg2
== NULL_TREE
)
3734 side_effects
= true;
3736 side_effects
= TREE_SIDE_EFFECTS (t
);
3742 if (code
== COND_EXPR
)
3743 TREE_READONLY (t
) = read_only
;
3745 TREE_SIDE_EFFECTS (t
) = side_effects
;
3746 TREE_THIS_VOLATILE (t
)
3747 = (TREE_CODE_CLASS (code
) == tcc_reference
3748 && arg0
&& TREE_THIS_VOLATILE (arg0
));
3754 build4_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
3755 tree arg2
, tree arg3 MEM_STAT_DECL
)
3757 bool constant
, read_only
, side_effects
;
3760 gcc_assert (TREE_CODE_LENGTH (code
) == 4);
3762 t
= make_node_stat (code PASS_MEM_STAT
);
3765 side_effects
= TREE_SIDE_EFFECTS (t
);
3772 TREE_SIDE_EFFECTS (t
) = side_effects
;
3773 TREE_THIS_VOLATILE (t
)
3774 = (TREE_CODE_CLASS (code
) == tcc_reference
3775 && arg0
&& TREE_THIS_VOLATILE (arg0
));
3781 build5_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
3782 tree arg2
, tree arg3
, tree arg4 MEM_STAT_DECL
)
3784 bool constant
, read_only
, side_effects
;
3787 gcc_assert (TREE_CODE_LENGTH (code
) == 5);
3789 t
= make_node_stat (code PASS_MEM_STAT
);
3792 side_effects
= TREE_SIDE_EFFECTS (t
);
3800 TREE_SIDE_EFFECTS (t
) = side_effects
;
3801 TREE_THIS_VOLATILE (t
)
3802 = (TREE_CODE_CLASS (code
) == tcc_reference
3803 && arg0
&& TREE_THIS_VOLATILE (arg0
));
3809 build6_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
3810 tree arg2
, tree arg3
, tree arg4
, tree arg5 MEM_STAT_DECL
)
3812 bool constant
, read_only
, side_effects
;
3815 gcc_assert (code
== TARGET_MEM_REF
);
3817 t
= make_node_stat (code PASS_MEM_STAT
);
3820 side_effects
= TREE_SIDE_EFFECTS (t
);
3827 if (code
== TARGET_MEM_REF
)
3831 TREE_SIDE_EFFECTS (t
) = side_effects
;
3832 TREE_THIS_VOLATILE (t
)
3833 = (code
== TARGET_MEM_REF
3834 && arg5
&& TREE_THIS_VOLATILE (arg5
));
3839 /* Similar except don't specify the TREE_TYPE
3840 and leave the TREE_SIDE_EFFECTS as 0.
3841 It is permissible for arguments to be null,
3842 or even garbage if their values do not matter. */
3845 build_nt (enum tree_code code
, ...)
3852 gcc_assert (TREE_CODE_CLASS (code
) != tcc_vl_exp
);
3856 t
= make_node (code
);
3857 length
= TREE_CODE_LENGTH (code
);
3859 for (i
= 0; i
< length
; i
++)
3860 TREE_OPERAND (t
, i
) = va_arg (p
, tree
);
3866 /* Similar to build_nt, but for creating a CALL_EXPR object with
3867 ARGLIST passed as a list. */
3870 build_nt_call_list (tree fn
, tree arglist
)
3875 t
= build_vl_exp (CALL_EXPR
, list_length (arglist
) + 3);
3876 CALL_EXPR_FN (t
) = fn
;
3877 CALL_EXPR_STATIC_CHAIN (t
) = NULL_TREE
;
3878 for (i
= 0; arglist
; arglist
= TREE_CHAIN (arglist
), i
++)
3879 CALL_EXPR_ARG (t
, i
) = TREE_VALUE (arglist
);
3883 /* Similar to build_nt, but for creating a CALL_EXPR object with a
3887 build_nt_call_vec (tree fn
, VEC(tree
,gc
) *args
)
3892 ret
= build_vl_exp (CALL_EXPR
, VEC_length (tree
, args
) + 3);
3893 CALL_EXPR_FN (ret
) = fn
;
3894 CALL_EXPR_STATIC_CHAIN (ret
) = NULL_TREE
;
3895 for (ix
= 0; VEC_iterate (tree
, args
, ix
, t
); ++ix
)
3896 CALL_EXPR_ARG (ret
, ix
) = t
;
3900 /* Create a DECL_... node of code CODE, name NAME and data type TYPE.
3901 We do NOT enter this node in any sort of symbol table.
3903 LOC is the location of the decl.
3905 layout_decl is used to set up the decl's storage layout.
3906 Other slots are initialized to 0 or null pointers. */
3909 build_decl_stat (location_t loc
, enum tree_code code
, tree name
,
3910 tree type MEM_STAT_DECL
)
3914 t
= make_node_stat (code PASS_MEM_STAT
);
3915 DECL_SOURCE_LOCATION (t
) = loc
;
3917 /* if (type == error_mark_node)
3918 type = integer_type_node; */
3919 /* That is not done, deliberately, so that having error_mark_node
3920 as the type can suppress useless errors in the use of this variable. */
3922 DECL_NAME (t
) = name
;
3923 TREE_TYPE (t
) = type
;
3925 if (code
== VAR_DECL
|| code
== PARM_DECL
|| code
== RESULT_DECL
)
3931 /* Builds and returns function declaration with NAME and TYPE. */
3934 build_fn_decl (const char *name
, tree type
)
3936 tree id
= get_identifier (name
);
3937 tree decl
= build_decl (input_location
, FUNCTION_DECL
, id
, type
);
3939 DECL_EXTERNAL (decl
) = 1;
3940 TREE_PUBLIC (decl
) = 1;
3941 DECL_ARTIFICIAL (decl
) = 1;
3942 TREE_NOTHROW (decl
) = 1;
3948 /* BLOCK nodes are used to represent the structure of binding contours
3949 and declarations, once those contours have been exited and their contents
3950 compiled. This information is used for outputting debugging info. */
3953 build_block (tree vars
, tree subblocks
, tree supercontext
, tree chain
)
3955 tree block
= make_node (BLOCK
);
3957 BLOCK_VARS (block
) = vars
;
3958 BLOCK_SUBBLOCKS (block
) = subblocks
;
3959 BLOCK_SUPERCONTEXT (block
) = supercontext
;
3960 BLOCK_CHAIN (block
) = chain
;
3965 expand_location (source_location loc
)
3967 expanded_location xloc
;
3968 if (loc
<= BUILTINS_LOCATION
)
3970 xloc
.file
= loc
== UNKNOWN_LOCATION
? NULL
: _("<built-in>");
3977 const struct line_map
*map
= linemap_lookup (line_table
, loc
);
3978 xloc
.file
= map
->to_file
;
3979 xloc
.line
= SOURCE_LINE (map
, loc
);
3980 xloc
.column
= SOURCE_COLUMN (map
, loc
);
3981 xloc
.sysp
= map
->sysp
!= 0;
3987 /* Like SET_EXPR_LOCATION, but make sure the tree can have a location.
3989 LOC is the location to use in tree T. */
3992 protected_set_expr_location (tree t
, location_t loc
)
3994 if (t
&& CAN_HAVE_LOCATION_P (t
))
3995 SET_EXPR_LOCATION (t
, loc
);
3998 /* Return a declaration like DDECL except that its DECL_ATTRIBUTES
4002 build_decl_attribute_variant (tree ddecl
, tree attribute
)
4004 DECL_ATTRIBUTES (ddecl
) = attribute
;
4008 /* Borrowed from hashtab.c iterative_hash implementation. */
4009 #define mix(a,b,c) \
4011 a -= b; a -= c; a ^= (c>>13); \
4012 b -= c; b -= a; b ^= (a<< 8); \
4013 c -= a; c -= b; c ^= ((b&0xffffffff)>>13); \
4014 a -= b; a -= c; a ^= ((c&0xffffffff)>>12); \
4015 b -= c; b -= a; b = (b ^ (a<<16)) & 0xffffffff; \
4016 c -= a; c -= b; c = (c ^ (b>> 5)) & 0xffffffff; \
4017 a -= b; a -= c; a = (a ^ (c>> 3)) & 0xffffffff; \
4018 b -= c; b -= a; b = (b ^ (a<<10)) & 0xffffffff; \
4019 c -= a; c -= b; c = (c ^ (b>>15)) & 0xffffffff; \
4023 /* Produce good hash value combining VAL and VAL2. */
4025 iterative_hash_hashval_t (hashval_t val
, hashval_t val2
)
4027 /* the golden ratio; an arbitrary value. */
4028 hashval_t a
= 0x9e3779b9;
4034 /* Produce good hash value combining VAL and VAL2. */
4036 iterative_hash_host_wide_int (HOST_WIDE_INT val
, hashval_t val2
)
4038 if (sizeof (HOST_WIDE_INT
) == sizeof (hashval_t
))
4039 return iterative_hash_hashval_t (val
, val2
);
4042 hashval_t a
= (hashval_t
) val
;
4043 /* Avoid warnings about shifting of more than the width of the type on
4044 hosts that won't execute this path. */
4046 hashval_t b
= (hashval_t
) (val
>> (sizeof (hashval_t
) * 8 + zero
));
4048 if (sizeof (HOST_WIDE_INT
) > 2 * sizeof (hashval_t
))
4050 hashval_t a
= (hashval_t
) (val
>> (sizeof (hashval_t
) * 16 + zero
));
4051 hashval_t b
= (hashval_t
) (val
>> (sizeof (hashval_t
) * 24 + zero
));
4058 /* Return a type like TTYPE except that its TYPE_ATTRIBUTE
4059 is ATTRIBUTE and its qualifiers are QUALS.
4061 Record such modified types already made so we don't make duplicates. */
4064 build_type_attribute_qual_variant (tree ttype
, tree attribute
, int quals
)
4066 if (! attribute_list_equal (TYPE_ATTRIBUTES (ttype
), attribute
))
4068 hashval_t hashcode
= 0;
4070 enum tree_code code
= TREE_CODE (ttype
);
4072 /* Building a distinct copy of a tagged type is inappropriate; it
4073 causes breakage in code that expects there to be a one-to-one
4074 relationship between a struct and its fields.
4075 build_duplicate_type is another solution (as used in
4076 handle_transparent_union_attribute), but that doesn't play well
4077 with the stronger C++ type identity model. */
4078 if (TREE_CODE (ttype
) == RECORD_TYPE
4079 || TREE_CODE (ttype
) == UNION_TYPE
4080 || TREE_CODE (ttype
) == QUAL_UNION_TYPE
4081 || TREE_CODE (ttype
) == ENUMERAL_TYPE
)
4083 warning (OPT_Wattributes
,
4084 "ignoring attributes applied to %qT after definition",
4085 TYPE_MAIN_VARIANT (ttype
));
4086 return build_qualified_type (ttype
, quals
);
4089 ttype
= build_qualified_type (ttype
, TYPE_UNQUALIFIED
);
4090 ntype
= build_distinct_type_copy (ttype
);
4092 TYPE_ATTRIBUTES (ntype
) = attribute
;
4094 hashcode
= iterative_hash_object (code
, hashcode
);
4095 if (TREE_TYPE (ntype
))
4096 hashcode
= iterative_hash_object (TYPE_HASH (TREE_TYPE (ntype
)),
4098 hashcode
= attribute_hash_list (attribute
, hashcode
);
4100 switch (TREE_CODE (ntype
))
4103 hashcode
= type_hash_list (TYPE_ARG_TYPES (ntype
), hashcode
);
4106 if (TYPE_DOMAIN (ntype
))
4107 hashcode
= iterative_hash_object (TYPE_HASH (TYPE_DOMAIN (ntype
)),
4111 hashcode
= iterative_hash_object
4112 (TREE_INT_CST_LOW (TYPE_MAX_VALUE (ntype
)), hashcode
);
4113 hashcode
= iterative_hash_object
4114 (TREE_INT_CST_HIGH (TYPE_MAX_VALUE (ntype
)), hashcode
);
4117 case FIXED_POINT_TYPE
:
4119 unsigned int precision
= TYPE_PRECISION (ntype
);
4120 hashcode
= iterative_hash_object (precision
, hashcode
);
4127 ntype
= type_hash_canon (hashcode
, ntype
);
4129 /* If the target-dependent attributes make NTYPE different from
4130 its canonical type, we will need to use structural equality
4131 checks for this type. */
4132 if (TYPE_STRUCTURAL_EQUALITY_P (ttype
)
4133 || !targetm
.comp_type_attributes (ntype
, ttype
))
4134 SET_TYPE_STRUCTURAL_EQUALITY (ntype
);
4135 else if (TYPE_CANONICAL (ntype
) == ntype
)
4136 TYPE_CANONICAL (ntype
) = TYPE_CANONICAL (ttype
);
4138 ttype
= build_qualified_type (ntype
, quals
);
4140 else if (TYPE_QUALS (ttype
) != quals
)
4141 ttype
= build_qualified_type (ttype
, quals
);
4147 /* Return a type like TTYPE except that its TYPE_ATTRIBUTE
4150 Record such modified types already made so we don't make duplicates. */
4153 build_type_attribute_variant (tree ttype
, tree attribute
)
4155 return build_type_attribute_qual_variant (ttype
, attribute
,
4156 TYPE_QUALS (ttype
));
4160 /* Reset all the fields in a binfo node BINFO. We only keep
4161 BINFO_VIRTUALS, which is used by gimple_fold_obj_type_ref. */
4164 free_lang_data_in_binfo (tree binfo
)
4169 gcc_assert (TREE_CODE (binfo
) == TREE_BINFO
);
4171 BINFO_VTABLE (binfo
) = NULL_TREE
;
4172 BINFO_BASE_ACCESSES (binfo
) = NULL
;
4173 BINFO_INHERITANCE_CHAIN (binfo
) = NULL_TREE
;
4174 BINFO_SUBVTT_INDEX (binfo
) = NULL_TREE
;
4176 for (i
= 0; VEC_iterate (tree
, BINFO_BASE_BINFOS (binfo
), i
, t
); i
++)
4177 free_lang_data_in_binfo (t
);
4181 /* Reset all language specific information still present in TYPE. */
4184 free_lang_data_in_type (tree type
)
4186 gcc_assert (TYPE_P (type
));
4188 /* Give the FE a chance to remove its own data first. */
4189 lang_hooks
.free_lang_data (type
);
4191 TREE_LANG_FLAG_0 (type
) = 0;
4192 TREE_LANG_FLAG_1 (type
) = 0;
4193 TREE_LANG_FLAG_2 (type
) = 0;
4194 TREE_LANG_FLAG_3 (type
) = 0;
4195 TREE_LANG_FLAG_4 (type
) = 0;
4196 TREE_LANG_FLAG_5 (type
) = 0;
4197 TREE_LANG_FLAG_6 (type
) = 0;
4199 if (TREE_CODE (type
) == FUNCTION_TYPE
)
4201 /* Remove the const and volatile qualifiers from arguments. The
4202 C++ front end removes them, but the C front end does not,
4203 leading to false ODR violation errors when merging two
4204 instances of the same function signature compiled by
4205 different front ends. */
4208 for (p
= TYPE_ARG_TYPES (type
); p
; p
= TREE_CHAIN (p
))
4210 tree arg_type
= TREE_VALUE (p
);
4212 if (TYPE_READONLY (arg_type
) || TYPE_VOLATILE (arg_type
))
4214 int quals
= TYPE_QUALS (arg_type
)
4216 & ~TYPE_QUAL_VOLATILE
;
4217 TREE_VALUE (p
) = build_qualified_type (arg_type
, quals
);
4218 free_lang_data_in_type (TREE_VALUE (p
));
4223 /* Remove members that are not actually FIELD_DECLs from the field
4224 list of an aggregate. These occur in C++. */
4225 if (RECORD_OR_UNION_TYPE_P (type
))
4229 /* Note that TYPE_FIELDS can be shared across distinct
4230 TREE_TYPEs. Therefore, if the first field of TYPE_FIELDS is
4231 to be removed, we cannot set its TREE_CHAIN to NULL.
4232 Otherwise, we would not be able to find all the other fields
4233 in the other instances of this TREE_TYPE.
4235 This was causing an ICE in testsuite/g++.dg/lto/20080915.C. */
4237 member
= TYPE_FIELDS (type
);
4240 if (TREE_CODE (member
) == FIELD_DECL
)
4243 TREE_CHAIN (prev
) = member
;
4245 TYPE_FIELDS (type
) = member
;
4249 member
= TREE_CHAIN (member
);
4253 TREE_CHAIN (prev
) = NULL_TREE
;
4255 TYPE_FIELDS (type
) = NULL_TREE
;
4257 TYPE_METHODS (type
) = NULL_TREE
;
4258 if (TYPE_BINFO (type
))
4259 free_lang_data_in_binfo (TYPE_BINFO (type
));
4263 /* For non-aggregate types, clear out the language slot (which
4264 overloads TYPE_BINFO). */
4265 TYPE_LANG_SLOT_1 (type
) = NULL_TREE
;
4268 TYPE_CONTEXT (type
) = NULL_TREE
;
4269 if (debug_info_level
< DINFO_LEVEL_TERSE
)
4270 TYPE_STUB_DECL (type
) = NULL_TREE
;
4274 /* Return true if DECL may need an assembler name to be set. */
4277 need_assembler_name_p (tree decl
)
4279 /* Only FUNCTION_DECLs and VAR_DECLs are considered. */
4280 if (TREE_CODE (decl
) != FUNCTION_DECL
4281 && TREE_CODE (decl
) != VAR_DECL
)
4284 /* If DECL already has its assembler name set, it does not need a
4286 if (!HAS_DECL_ASSEMBLER_NAME_P (decl
)
4287 || DECL_ASSEMBLER_NAME_SET_P (decl
))
4290 /* Abstract decls do not need an assembler name. */
4291 if (DECL_ABSTRACT (decl
))
4294 /* For VAR_DECLs, only static, public and external symbols need an
4296 if (TREE_CODE (decl
) == VAR_DECL
4297 && !TREE_STATIC (decl
)
4298 && !TREE_PUBLIC (decl
)
4299 && !DECL_EXTERNAL (decl
))
4302 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4304 /* Do not set assembler name on builtins. Allow RTL expansion to
4305 decide whether to expand inline or via a regular call. */
4306 if (DECL_BUILT_IN (decl
)
4307 && DECL_BUILT_IN_CLASS (decl
) != BUILT_IN_FRONTEND
)
4310 /* Functions represented in the callgraph need an assembler name. */
4311 if (cgraph_get_node (decl
) != NULL
)
4314 /* Unused and not public functions don't need an assembler name. */
4315 if (!TREE_USED (decl
) && !TREE_PUBLIC (decl
))
4323 /* Remove all the non-variable decls from BLOCK. LOCALS is the set of
4324 variables in DECL_STRUCT_FUNCTION (FN)->local_decls. Every decl
4325 in BLOCK that is not in LOCALS is removed. */
4328 free_lang_data_in_block (tree fn
, tree block
, struct pointer_set_t
*locals
)
4332 tp
= &BLOCK_VARS (block
);
4335 if (!pointer_set_contains (locals
, *tp
))
4336 *tp
= TREE_CHAIN (*tp
);
4338 tp
= &TREE_CHAIN (*tp
);
4341 for (t
= BLOCK_SUBBLOCKS (block
); t
; t
= BLOCK_CHAIN (t
))
4342 free_lang_data_in_block (fn
, t
, locals
);
4346 /* Reset all language specific information still present in symbol
4350 free_lang_data_in_decl (tree decl
)
4352 gcc_assert (DECL_P (decl
));
4354 /* Give the FE a chance to remove its own data first. */
4355 lang_hooks
.free_lang_data (decl
);
4357 TREE_LANG_FLAG_0 (decl
) = 0;
4358 TREE_LANG_FLAG_1 (decl
) = 0;
4359 TREE_LANG_FLAG_2 (decl
) = 0;
4360 TREE_LANG_FLAG_3 (decl
) = 0;
4361 TREE_LANG_FLAG_4 (decl
) = 0;
4362 TREE_LANG_FLAG_5 (decl
) = 0;
4363 TREE_LANG_FLAG_6 (decl
) = 0;
4365 /* Identifiers need not have a type. */
4366 if (DECL_NAME (decl
))
4367 TREE_TYPE (DECL_NAME (decl
)) = NULL_TREE
;
4369 /* Ignore any intervening types, because we are going to clear their
4370 TYPE_CONTEXT fields. */
4371 if (TREE_CODE (decl
) != FIELD_DECL
)
4372 DECL_CONTEXT (decl
) = decl_function_context (decl
);
4374 if (DECL_CONTEXT (decl
)
4375 && TREE_CODE (DECL_CONTEXT (decl
)) == NAMESPACE_DECL
)
4376 DECL_CONTEXT (decl
) = NULL_TREE
;
4378 if (TREE_CODE (decl
) == VAR_DECL
)
4380 tree context
= DECL_CONTEXT (decl
);
4384 enum tree_code code
= TREE_CODE (context
);
4385 if (code
== FUNCTION_DECL
&& DECL_ABSTRACT (context
))
4387 /* Do not clear the decl context here, that will promote
4388 all vars to global ones. */
4389 DECL_INITIAL (decl
) = NULL_TREE
;
4392 if (TREE_STATIC (decl
))
4393 DECL_CONTEXT (decl
) = NULL_TREE
;
4397 /* ??? We could free non-constant DECL_SIZE, DECL_SIZE_UNIT
4398 and DECL_FIELD_OFFSET. But it's cheap enough to not do
4399 that and refrain from adding workarounds to dwarf2out.c */
4401 /* DECL_FCONTEXT is only used for debug info generation. */
4402 if (TREE_CODE (decl
) == FIELD_DECL
4403 && debug_info_level
< DINFO_LEVEL_TERSE
)
4404 DECL_FCONTEXT (decl
) = NULL_TREE
;
4406 if (TREE_CODE (decl
) == FUNCTION_DECL
)
4408 if (gimple_has_body_p (decl
))
4411 struct pointer_set_t
*locals
;
4413 /* If DECL has a gimple body, then the context for its
4414 arguments must be DECL. Otherwise, it doesn't really
4415 matter, as we will not be emitting any code for DECL. In
4416 general, there may be other instances of DECL created by
4417 the front end and since PARM_DECLs are generally shared,
4418 their DECL_CONTEXT changes as the replicas of DECL are
4419 created. The only time where DECL_CONTEXT is important
4420 is for the FUNCTION_DECLs that have a gimple body (since
4421 the PARM_DECL will be used in the function's body). */
4422 for (t
= DECL_ARGUMENTS (decl
); t
; t
= TREE_CHAIN (t
))
4423 DECL_CONTEXT (t
) = decl
;
4425 /* Collect all the symbols declared in DECL. */
4426 locals
= pointer_set_create ();
4427 t
= DECL_STRUCT_FUNCTION (decl
)->local_decls
;
4428 for (; t
; t
= TREE_CHAIN (t
))
4430 pointer_set_insert (locals
, TREE_VALUE (t
));
4432 /* All the local symbols should have DECL as their
4434 DECL_CONTEXT (TREE_VALUE (t
)) = decl
;
4437 /* Get rid of any decl not in local_decls. */
4438 free_lang_data_in_block (decl
, DECL_INITIAL (decl
), locals
);
4440 pointer_set_destroy (locals
);
4443 /* DECL_SAVED_TREE holds the GENERIC representation for DECL.
4444 At this point, it is not needed anymore. */
4445 DECL_SAVED_TREE (decl
) = NULL_TREE
;
4447 else if (TREE_CODE (decl
) == VAR_DECL
)
4449 tree expr
= DECL_DEBUG_EXPR (decl
);
4451 && TREE_CODE (expr
) == VAR_DECL
4452 && !TREE_STATIC (expr
) && !DECL_EXTERNAL (expr
))
4453 SET_DECL_DEBUG_EXPR (decl
, NULL_TREE
);
4455 if (DECL_EXTERNAL (decl
)
4456 && (!TREE_STATIC (decl
) || !TREE_READONLY (decl
)))
4457 DECL_INITIAL (decl
) = NULL_TREE
;
4459 else if (TREE_CODE (decl
) == TYPE_DECL
)
4461 DECL_INITIAL (decl
) = NULL_TREE
;
4463 /* DECL_CONTEXT is overloaded as DECL_FIELD_CONTEXT for
4464 FIELD_DECLs, which should be preserved. Otherwise,
4465 we shouldn't be concerned with source-level lexical
4466 nesting beyond this point. */
4467 DECL_CONTEXT (decl
) = NULL_TREE
;
4472 /* Data used when collecting DECLs and TYPEs for language data removal. */
4474 struct free_lang_data_d
4476 /* Worklist to avoid excessive recursion. */
4477 VEC(tree
,heap
) *worklist
;
4479 /* Set of traversed objects. Used to avoid duplicate visits. */
4480 struct pointer_set_t
*pset
;
4482 /* Array of symbols to process with free_lang_data_in_decl. */
4483 VEC(tree
,heap
) *decls
;
4485 /* Array of types to process with free_lang_data_in_type. */
4486 VEC(tree
,heap
) *types
;
4490 /* Save all language fields needed to generate proper debug information
4491 for DECL. This saves most fields cleared out by free_lang_data_in_decl. */
4494 save_debug_info_for_decl (tree t
)
4496 /*struct saved_debug_info_d *sdi;*/
4498 gcc_assert (debug_info_level
> DINFO_LEVEL_TERSE
&& t
&& DECL_P (t
));
4500 /* FIXME. Partial implementation for saving debug info removed. */
4504 /* Save all language fields needed to generate proper debug information
4505 for TYPE. This saves most fields cleared out by free_lang_data_in_type. */
4508 save_debug_info_for_type (tree t
)
4510 /*struct saved_debug_info_d *sdi;*/
4512 gcc_assert (debug_info_level
> DINFO_LEVEL_TERSE
&& t
&& TYPE_P (t
));
4514 /* FIXME. Partial implementation for saving debug info removed. */
4518 /* Add type or decl T to one of the list of tree nodes that need their
4519 language data removed. The lists are held inside FLD. */
4522 add_tree_to_fld_list (tree t
, struct free_lang_data_d
*fld
)
4526 VEC_safe_push (tree
, heap
, fld
->decls
, t
);
4527 if (debug_info_level
> DINFO_LEVEL_TERSE
)
4528 save_debug_info_for_decl (t
);
4530 else if (TYPE_P (t
))
4532 VEC_safe_push (tree
, heap
, fld
->types
, t
);
4533 if (debug_info_level
> DINFO_LEVEL_TERSE
)
4534 save_debug_info_for_type (t
);
4540 /* Push tree node T into FLD->WORKLIST. */
4543 fld_worklist_push (tree t
, struct free_lang_data_d
*fld
)
4545 if (t
&& !is_lang_specific (t
) && !pointer_set_contains (fld
->pset
, t
))
4546 VEC_safe_push (tree
, heap
, fld
->worklist
, (t
));
4550 /* Operand callback helper for free_lang_data_in_node. *TP is the
4551 subtree operand being considered. */
4554 find_decls_types_r (tree
*tp
, int *ws
, void *data
)
4557 struct free_lang_data_d
*fld
= (struct free_lang_data_d
*) data
;
4559 if (TREE_CODE (t
) == TREE_LIST
)
4562 /* Language specific nodes will be removed, so there is no need
4563 to gather anything under them. */
4564 if (is_lang_specific (t
))
4572 /* Note that walk_tree does not traverse every possible field in
4573 decls, so we have to do our own traversals here. */
4574 add_tree_to_fld_list (t
, fld
);
4576 fld_worklist_push (DECL_NAME (t
), fld
);
4577 fld_worklist_push (DECL_CONTEXT (t
), fld
);
4578 fld_worklist_push (DECL_SIZE (t
), fld
);
4579 fld_worklist_push (DECL_SIZE_UNIT (t
), fld
);
4581 /* We are going to remove everything under DECL_INITIAL for
4582 TYPE_DECLs. No point walking them. */
4583 if (TREE_CODE (t
) != TYPE_DECL
)
4584 fld_worklist_push (DECL_INITIAL (t
), fld
);
4586 fld_worklist_push (DECL_ATTRIBUTES (t
), fld
);
4587 fld_worklist_push (DECL_ABSTRACT_ORIGIN (t
), fld
);
4589 if (TREE_CODE (t
) == FUNCTION_DECL
)
4591 fld_worklist_push (DECL_ARGUMENTS (t
), fld
);
4592 fld_worklist_push (DECL_RESULT (t
), fld
);
4594 else if (TREE_CODE (t
) == TYPE_DECL
)
4596 fld_worklist_push (DECL_ARGUMENT_FLD (t
), fld
);
4597 fld_worklist_push (DECL_VINDEX (t
), fld
);
4599 else if (TREE_CODE (t
) == FIELD_DECL
)
4601 fld_worklist_push (DECL_FIELD_OFFSET (t
), fld
);
4602 fld_worklist_push (DECL_BIT_FIELD_TYPE (t
), fld
);
4603 fld_worklist_push (DECL_QUALIFIER (t
), fld
);
4604 fld_worklist_push (DECL_FIELD_BIT_OFFSET (t
), fld
);
4605 fld_worklist_push (DECL_FCONTEXT (t
), fld
);
4607 else if (TREE_CODE (t
) == VAR_DECL
)
4609 fld_worklist_push (DECL_SECTION_NAME (t
), fld
);
4610 fld_worklist_push (DECL_COMDAT_GROUP (t
), fld
);
4613 if (TREE_CODE (t
) != FIELD_DECL
)
4614 fld_worklist_push (TREE_CHAIN (t
), fld
);
4617 else if (TYPE_P (t
))
4619 /* Note that walk_tree does not traverse every possible field in
4620 types, so we have to do our own traversals here. */
4621 add_tree_to_fld_list (t
, fld
);
4623 if (!RECORD_OR_UNION_TYPE_P (t
))
4624 fld_worklist_push (TYPE_CACHED_VALUES (t
), fld
);
4625 fld_worklist_push (TYPE_SIZE (t
), fld
);
4626 fld_worklist_push (TYPE_SIZE_UNIT (t
), fld
);
4627 fld_worklist_push (TYPE_ATTRIBUTES (t
), fld
);
4628 fld_worklist_push (TYPE_POINTER_TO (t
), fld
);
4629 fld_worklist_push (TYPE_REFERENCE_TO (t
), fld
);
4630 fld_worklist_push (TYPE_NAME (t
), fld
);
4631 fld_worklist_push (TYPE_MINVAL (t
), fld
);
4632 if (!RECORD_OR_UNION_TYPE_P (t
))
4633 fld_worklist_push (TYPE_MAXVAL (t
), fld
);
4634 fld_worklist_push (TYPE_MAIN_VARIANT (t
), fld
);
4635 fld_worklist_push (TYPE_NEXT_VARIANT (t
), fld
);
4636 fld_worklist_push (TYPE_CONTEXT (t
), fld
);
4637 fld_worklist_push (TYPE_CANONICAL (t
), fld
);
4639 if (RECORD_OR_UNION_TYPE_P (t
) && TYPE_BINFO (t
))
4643 for (i
= 0; VEC_iterate (tree
, BINFO_BASE_BINFOS (TYPE_BINFO (t
)),
4645 fld_worklist_push (TREE_TYPE (tem
), fld
);
4646 tem
= BINFO_VIRTUALS (TYPE_BINFO (t
));
4648 /* The Java FE overloads BINFO_VIRTUALS for its own purpose. */
4649 && TREE_CODE (tem
) == TREE_LIST
)
4652 fld_worklist_push (TREE_VALUE (tem
), fld
);
4653 tem
= TREE_CHAIN (tem
);
4657 if (RECORD_OR_UNION_TYPE_P (t
))
4660 /* Push all TYPE_FIELDS - there can be interleaving interesting
4661 and non-interesting things. */
4662 tem
= TYPE_FIELDS (t
);
4665 if (TREE_CODE (tem
) == FIELD_DECL
)
4666 fld_worklist_push (tem
, fld
);
4667 tem
= TREE_CHAIN (tem
);
4671 fld_worklist_push (TREE_CHAIN (t
), fld
);
4675 fld_worklist_push (TREE_TYPE (t
), fld
);
4681 /* Find decls and types in T. */
4684 find_decls_types (tree t
, struct free_lang_data_d
*fld
)
4688 if (!pointer_set_contains (fld
->pset
, t
))
4689 walk_tree (&t
, find_decls_types_r
, fld
, fld
->pset
);
4690 if (VEC_empty (tree
, fld
->worklist
))
4692 t
= VEC_pop (tree
, fld
->worklist
);
4696 /* Translate all the types in LIST with the corresponding runtime
4700 get_eh_types_for_runtime (tree list
)
4704 if (list
== NULL_TREE
)
4707 head
= build_tree_list (0, lookup_type_for_runtime (TREE_VALUE (list
)));
4709 list
= TREE_CHAIN (list
);
4712 tree n
= build_tree_list (0, lookup_type_for_runtime (TREE_VALUE (list
)));
4713 TREE_CHAIN (prev
) = n
;
4714 prev
= TREE_CHAIN (prev
);
4715 list
= TREE_CHAIN (list
);
4722 /* Find decls and types referenced in EH region R and store them in
4723 FLD->DECLS and FLD->TYPES. */
4726 find_decls_types_in_eh_region (eh_region r
, struct free_lang_data_d
*fld
)
4737 /* The types referenced in each catch must first be changed to the
4738 EH types used at runtime. This removes references to FE types
4740 for (c
= r
->u
.eh_try
.first_catch
; c
; c
= c
->next_catch
)
4742 c
->type_list
= get_eh_types_for_runtime (c
->type_list
);
4743 walk_tree (&c
->type_list
, find_decls_types_r
, fld
, fld
->pset
);
4748 case ERT_ALLOWED_EXCEPTIONS
:
4749 r
->u
.allowed
.type_list
4750 = get_eh_types_for_runtime (r
->u
.allowed
.type_list
);
4751 walk_tree (&r
->u
.allowed
.type_list
, find_decls_types_r
, fld
, fld
->pset
);
4754 case ERT_MUST_NOT_THROW
:
4755 walk_tree (&r
->u
.must_not_throw
.failure_decl
,
4756 find_decls_types_r
, fld
, fld
->pset
);
4762 /* Find decls and types referenced in cgraph node N and store them in
4763 FLD->DECLS and FLD->TYPES. Unlike pass_referenced_vars, this will
4764 look for *every* kind of DECL and TYPE node reachable from N,
4765 including those embedded inside types and decls (i.e,, TYPE_DECLs,
4766 NAMESPACE_DECLs, etc). */
4769 find_decls_types_in_node (struct cgraph_node
*n
, struct free_lang_data_d
*fld
)
4772 struct function
*fn
;
4775 find_decls_types (n
->decl
, fld
);
4777 if (!gimple_has_body_p (n
->decl
))
4780 gcc_assert (current_function_decl
== NULL_TREE
&& cfun
== NULL
);
4782 fn
= DECL_STRUCT_FUNCTION (n
->decl
);
4784 /* Traverse locals. */
4785 for (t
= fn
->local_decls
; t
; t
= TREE_CHAIN (t
))
4786 find_decls_types (TREE_VALUE (t
), fld
);
4788 /* Traverse EH regions in FN. */
4791 FOR_ALL_EH_REGION_FN (r
, fn
)
4792 find_decls_types_in_eh_region (r
, fld
);
4795 /* Traverse every statement in FN. */
4796 FOR_EACH_BB_FN (bb
, fn
)
4798 gimple_stmt_iterator si
;
4801 for (si
= gsi_start_phis (bb
); !gsi_end_p (si
); gsi_next (&si
))
4803 gimple phi
= gsi_stmt (si
);
4805 for (i
= 0; i
< gimple_phi_num_args (phi
); i
++)
4807 tree
*arg_p
= gimple_phi_arg_def_ptr (phi
, i
);
4808 find_decls_types (*arg_p
, fld
);
4812 for (si
= gsi_start_bb (bb
); !gsi_end_p (si
); gsi_next (&si
))
4814 gimple stmt
= gsi_stmt (si
);
4816 for (i
= 0; i
< gimple_num_ops (stmt
); i
++)
4818 tree arg
= gimple_op (stmt
, i
);
4819 find_decls_types (arg
, fld
);
4826 /* Find decls and types referenced in varpool node N and store them in
4827 FLD->DECLS and FLD->TYPES. Unlike pass_referenced_vars, this will
4828 look for *every* kind of DECL and TYPE node reachable from N,
4829 including those embedded inside types and decls (i.e,, TYPE_DECLs,
4830 NAMESPACE_DECLs, etc). */
4833 find_decls_types_in_var (struct varpool_node
*v
, struct free_lang_data_d
*fld
)
4835 find_decls_types (v
->decl
, fld
);
4838 /* If T needs an assembler name, have one created for it. */
4841 assign_assembler_name_if_neeeded (tree t
)
4843 if (need_assembler_name_p (t
))
4845 /* When setting DECL_ASSEMBLER_NAME, the C++ mangler may emit
4846 diagnostics that use input_location to show locus
4847 information. The problem here is that, at this point,
4848 input_location is generally anchored to the end of the file
4849 (since the parser is long gone), so we don't have a good
4850 position to pin it to.
4852 To alleviate this problem, this uses the location of T's
4853 declaration. Examples of this are
4854 testsuite/g++.dg/template/cond2.C and
4855 testsuite/g++.dg/template/pr35240.C. */
4856 location_t saved_location
= input_location
;
4857 input_location
= DECL_SOURCE_LOCATION (t
);
4859 decl_assembler_name (t
);
4861 input_location
= saved_location
;
4866 /* Free language specific information for every operand and expression
4867 in every node of the call graph. This process operates in three stages:
4869 1- Every callgraph node and varpool node is traversed looking for
4870 decls and types embedded in them. This is a more exhaustive
4871 search than that done by find_referenced_vars, because it will
4872 also collect individual fields, decls embedded in types, etc.
4874 2- All the decls found are sent to free_lang_data_in_decl.
4876 3- All the types found are sent to free_lang_data_in_type.
4878 The ordering between decls and types is important because
4879 free_lang_data_in_decl sets assembler names, which includes
4880 mangling. So types cannot be freed up until assembler names have
4884 free_lang_data_in_cgraph (void)
4886 struct cgraph_node
*n
;
4887 struct varpool_node
*v
;
4888 struct free_lang_data_d fld
;
4893 /* Initialize sets and arrays to store referenced decls and types. */
4894 fld
.pset
= pointer_set_create ();
4895 fld
.worklist
= NULL
;
4896 fld
.decls
= VEC_alloc (tree
, heap
, 100);
4897 fld
.types
= VEC_alloc (tree
, heap
, 100);
4899 /* Find decls and types in the body of every function in the callgraph. */
4900 for (n
= cgraph_nodes
; n
; n
= n
->next
)
4901 find_decls_types_in_node (n
, &fld
);
4903 for (i
= 0; VEC_iterate (alias_pair
, alias_pairs
, i
, p
); i
++)
4904 find_decls_types (p
->decl
, &fld
);
4906 /* Find decls and types in every varpool symbol. */
4907 for (v
= varpool_nodes_queue
; v
; v
= v
->next_needed
)
4908 find_decls_types_in_var (v
, &fld
);
4910 /* Set the assembler name on every decl found. We need to do this
4911 now because free_lang_data_in_decl will invalidate data needed
4912 for mangling. This breaks mangling on interdependent decls. */
4913 for (i
= 0; VEC_iterate (tree
, fld
.decls
, i
, t
); i
++)
4914 assign_assembler_name_if_neeeded (t
);
4916 /* Traverse every decl found freeing its language data. */
4917 for (i
= 0; VEC_iterate (tree
, fld
.decls
, i
, t
); i
++)
4918 free_lang_data_in_decl (t
);
4920 /* Traverse every type found freeing its language data. */
4921 for (i
= 0; VEC_iterate (tree
, fld
.types
, i
, t
); i
++)
4922 free_lang_data_in_type (t
);
4924 pointer_set_destroy (fld
.pset
);
4925 VEC_free (tree
, heap
, fld
.worklist
);
4926 VEC_free (tree
, heap
, fld
.decls
);
4927 VEC_free (tree
, heap
, fld
.types
);
4931 /* Free resources that are used by FE but are not needed once they are done. */
4934 free_lang_data (void)
4938 /* If we are the LTO frontend we have freed lang-specific data already. */
4940 || !flag_generate_lto
)
4943 /* Allocate and assign alias sets to the standard integer types
4944 while the slots are still in the way the frontends generated them. */
4945 for (i
= 0; i
< itk_none
; ++i
)
4946 if (integer_types
[i
])
4947 TYPE_ALIAS_SET (integer_types
[i
]) = get_alias_set (integer_types
[i
]);
4949 /* Traverse the IL resetting language specific information for
4950 operands, expressions, etc. */
4951 free_lang_data_in_cgraph ();
4953 /* Create gimple variants for common types. */
4954 ptrdiff_type_node
= integer_type_node
;
4955 fileptr_type_node
= ptr_type_node
;
4956 if (TREE_CODE (boolean_type_node
) != BOOLEAN_TYPE
4957 || (TYPE_MODE (boolean_type_node
)
4958 != mode_for_size (BOOL_TYPE_SIZE
, MODE_INT
, 0))
4959 || TYPE_PRECISION (boolean_type_node
) != 1
4960 || !TYPE_UNSIGNED (boolean_type_node
))
4962 boolean_type_node
= make_unsigned_type (BOOL_TYPE_SIZE
);
4963 TREE_SET_CODE (boolean_type_node
, BOOLEAN_TYPE
);
4964 TYPE_MAX_VALUE (boolean_type_node
) = build_int_cst (boolean_type_node
, 1);
4965 TYPE_PRECISION (boolean_type_node
) = 1;
4966 boolean_false_node
= TYPE_MIN_VALUE (boolean_type_node
);
4967 boolean_true_node
= TYPE_MAX_VALUE (boolean_type_node
);
4970 /* Unify char_type_node with its properly signed variant. */
4971 if (TYPE_UNSIGNED (char_type_node
))
4972 unsigned_char_type_node
= char_type_node
;
4974 signed_char_type_node
= char_type_node
;
4976 /* Reset some langhooks. Do not reset types_compatible_p, it may
4977 still be used indirectly via the get_alias_set langhook. */
4978 lang_hooks
.callgraph
.analyze_expr
= NULL
;
4979 lang_hooks
.dwarf_name
= lhd_dwarf_name
;
4980 lang_hooks
.decl_printable_name
= gimple_decl_printable_name
;
4981 lang_hooks
.set_decl_assembler_name
= lhd_set_decl_assembler_name
;
4982 lang_hooks
.fold_obj_type_ref
= gimple_fold_obj_type_ref
;
4984 /* Reset diagnostic machinery. */
4985 diagnostic_starter (global_dc
) = default_diagnostic_starter
;
4986 diagnostic_finalizer (global_dc
) = default_diagnostic_finalizer
;
4987 diagnostic_format_decoder (global_dc
) = default_tree_printer
;
4993 struct simple_ipa_opt_pass pass_ipa_free_lang_data
=
4997 "*free_lang_data", /* name */
4999 free_lang_data
, /* execute */
5002 0, /* static_pass_number */
5003 TV_IPA_FREE_LANG_DATA
, /* tv_id */
5004 0, /* properties_required */
5005 0, /* properties_provided */
5006 0, /* properties_destroyed */
5007 0, /* todo_flags_start */
5008 TODO_ggc_collect
/* todo_flags_finish */
5012 /* Return nonzero if IDENT is a valid name for attribute ATTR,
5015 We try both `text' and `__text__', ATTR may be either one. */
5016 /* ??? It might be a reasonable simplification to require ATTR to be only
5017 `text'. One might then also require attribute lists to be stored in
5018 their canonicalized form. */
5021 is_attribute_with_length_p (const char *attr
, int attr_len
, const_tree ident
)
5026 if (TREE_CODE (ident
) != IDENTIFIER_NODE
)
5029 p
= IDENTIFIER_POINTER (ident
);
5030 ident_len
= IDENTIFIER_LENGTH (ident
);
5032 if (ident_len
== attr_len
5033 && strcmp (attr
, p
) == 0)
5036 /* If ATTR is `__text__', IDENT must be `text'; and vice versa. */
5039 gcc_assert (attr
[1] == '_');
5040 gcc_assert (attr
[attr_len
- 2] == '_');
5041 gcc_assert (attr
[attr_len
- 1] == '_');
5042 if (ident_len
== attr_len
- 4
5043 && strncmp (attr
+ 2, p
, attr_len
- 4) == 0)
5048 if (ident_len
== attr_len
+ 4
5049 && p
[0] == '_' && p
[1] == '_'
5050 && p
[ident_len
- 2] == '_' && p
[ident_len
- 1] == '_'
5051 && strncmp (attr
, p
+ 2, attr_len
) == 0)
5058 /* Return nonzero if IDENT is a valid name for attribute ATTR,
5061 We try both `text' and `__text__', ATTR may be either one. */
5064 is_attribute_p (const char *attr
, const_tree ident
)
5066 return is_attribute_with_length_p (attr
, strlen (attr
), ident
);
5069 /* Given an attribute name and a list of attributes, return a pointer to the
5070 attribute's list element if the attribute is part of the list, or NULL_TREE
5071 if not found. If the attribute appears more than once, this only
5072 returns the first occurrence; the TREE_CHAIN of the return value should
5073 be passed back in if further occurrences are wanted. */
5076 lookup_attribute (const char *attr_name
, tree list
)
5079 size_t attr_len
= strlen (attr_name
);
5081 for (l
= list
; l
; l
= TREE_CHAIN (l
))
5083 gcc_assert (TREE_CODE (TREE_PURPOSE (l
)) == IDENTIFIER_NODE
);
5084 if (is_attribute_with_length_p (attr_name
, attr_len
, TREE_PURPOSE (l
)))
5090 /* Remove any instances of attribute ATTR_NAME in LIST and return the
5094 remove_attribute (const char *attr_name
, tree list
)
5097 size_t attr_len
= strlen (attr_name
);
5099 for (p
= &list
; *p
; )
5102 gcc_assert (TREE_CODE (TREE_PURPOSE (l
)) == IDENTIFIER_NODE
);
5103 if (is_attribute_with_length_p (attr_name
, attr_len
, TREE_PURPOSE (l
)))
5104 *p
= TREE_CHAIN (l
);
5106 p
= &TREE_CHAIN (l
);
5112 /* Return an attribute list that is the union of a1 and a2. */
5115 merge_attributes (tree a1
, tree a2
)
5119 /* Either one unset? Take the set one. */
5121 if ((attributes
= a1
) == 0)
5124 /* One that completely contains the other? Take it. */
5126 else if (a2
!= 0 && ! attribute_list_contained (a1
, a2
))
5128 if (attribute_list_contained (a2
, a1
))
5132 /* Pick the longest list, and hang on the other list. */
5134 if (list_length (a1
) < list_length (a2
))
5135 attributes
= a2
, a2
= a1
;
5137 for (; a2
!= 0; a2
= TREE_CHAIN (a2
))
5140 for (a
= lookup_attribute (IDENTIFIER_POINTER (TREE_PURPOSE (a2
)),
5143 a
= lookup_attribute (IDENTIFIER_POINTER (TREE_PURPOSE (a2
)),
5146 if (TREE_VALUE (a
) != NULL
5147 && TREE_CODE (TREE_VALUE (a
)) == TREE_LIST
5148 && TREE_VALUE (a2
) != NULL
5149 && TREE_CODE (TREE_VALUE (a2
)) == TREE_LIST
)
5151 if (simple_cst_list_equal (TREE_VALUE (a
),
5152 TREE_VALUE (a2
)) == 1)
5155 else if (simple_cst_equal (TREE_VALUE (a
),
5156 TREE_VALUE (a2
)) == 1)
5161 a1
= copy_node (a2
);
5162 TREE_CHAIN (a1
) = attributes
;
5171 /* Given types T1 and T2, merge their attributes and return
5175 merge_type_attributes (tree t1
, tree t2
)
5177 return merge_attributes (TYPE_ATTRIBUTES (t1
),
5178 TYPE_ATTRIBUTES (t2
));
5181 /* Given decls OLDDECL and NEWDECL, merge their attributes and return
5185 merge_decl_attributes (tree olddecl
, tree newdecl
)
5187 return merge_attributes (DECL_ATTRIBUTES (olddecl
),
5188 DECL_ATTRIBUTES (newdecl
));
5191 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
5193 /* Specialization of merge_decl_attributes for various Windows targets.
5195 This handles the following situation:
5197 __declspec (dllimport) int foo;
5200 The second instance of `foo' nullifies the dllimport. */
5203 merge_dllimport_decl_attributes (tree old
, tree new_tree
)
5206 int delete_dllimport_p
= 1;
5208 /* What we need to do here is remove from `old' dllimport if it doesn't
5209 appear in `new'. dllimport behaves like extern: if a declaration is
5210 marked dllimport and a definition appears later, then the object
5211 is not dllimport'd. We also remove a `new' dllimport if the old list
5212 contains dllexport: dllexport always overrides dllimport, regardless
5213 of the order of declaration. */
5214 if (!VAR_OR_FUNCTION_DECL_P (new_tree
))
5215 delete_dllimport_p
= 0;
5216 else if (DECL_DLLIMPORT_P (new_tree
)
5217 && lookup_attribute ("dllexport", DECL_ATTRIBUTES (old
)))
5219 DECL_DLLIMPORT_P (new_tree
) = 0;
5220 warning (OPT_Wattributes
, "%q+D already declared with dllexport attribute: "
5221 "dllimport ignored", new_tree
);
5223 else if (DECL_DLLIMPORT_P (old
) && !DECL_DLLIMPORT_P (new_tree
))
5225 /* Warn about overriding a symbol that has already been used, e.g.:
5226 extern int __attribute__ ((dllimport)) foo;
5227 int* bar () {return &foo;}
5230 if (TREE_USED (old
))
5232 warning (0, "%q+D redeclared without dllimport attribute "
5233 "after being referenced with dll linkage", new_tree
);
5234 /* If we have used a variable's address with dllimport linkage,
5235 keep the old DECL_DLLIMPORT_P flag: the ADDR_EXPR using the
5236 decl may already have had TREE_CONSTANT computed.
5237 We still remove the attribute so that assembler code refers
5238 to '&foo rather than '_imp__foo'. */
5239 if (TREE_CODE (old
) == VAR_DECL
&& TREE_ADDRESSABLE (old
))
5240 DECL_DLLIMPORT_P (new_tree
) = 1;
5243 /* Let an inline definition silently override the external reference,
5244 but otherwise warn about attribute inconsistency. */
5245 else if (TREE_CODE (new_tree
) == VAR_DECL
5246 || !DECL_DECLARED_INLINE_P (new_tree
))
5247 warning (OPT_Wattributes
, "%q+D redeclared without dllimport attribute: "
5248 "previous dllimport ignored", new_tree
);
5251 delete_dllimport_p
= 0;
5253 a
= merge_attributes (DECL_ATTRIBUTES (old
), DECL_ATTRIBUTES (new_tree
));
5255 if (delete_dllimport_p
)
5258 const size_t attr_len
= strlen ("dllimport");
5260 /* Scan the list for dllimport and delete it. */
5261 for (prev
= NULL_TREE
, t
= a
; t
; prev
= t
, t
= TREE_CHAIN (t
))
5263 if (is_attribute_with_length_p ("dllimport", attr_len
,
5266 if (prev
== NULL_TREE
)
5269 TREE_CHAIN (prev
) = TREE_CHAIN (t
);
5278 /* Handle a "dllimport" or "dllexport" attribute; arguments as in
5279 struct attribute_spec.handler. */
5282 handle_dll_attribute (tree
* pnode
, tree name
, tree args
, int flags
,
5288 /* These attributes may apply to structure and union types being created,
5289 but otherwise should pass to the declaration involved. */
5292 if (flags
& ((int) ATTR_FLAG_DECL_NEXT
| (int) ATTR_FLAG_FUNCTION_NEXT
5293 | (int) ATTR_FLAG_ARRAY_NEXT
))
5295 *no_add_attrs
= true;
5296 return tree_cons (name
, args
, NULL_TREE
);
5298 if (TREE_CODE (node
) == RECORD_TYPE
5299 || TREE_CODE (node
) == UNION_TYPE
)
5301 node
= TYPE_NAME (node
);
5307 warning (OPT_Wattributes
, "%qE attribute ignored",
5309 *no_add_attrs
= true;
5314 if (TREE_CODE (node
) != FUNCTION_DECL
5315 && TREE_CODE (node
) != VAR_DECL
5316 && TREE_CODE (node
) != TYPE_DECL
)
5318 *no_add_attrs
= true;
5319 warning (OPT_Wattributes
, "%qE attribute ignored",
5324 if (TREE_CODE (node
) == TYPE_DECL
5325 && TREE_CODE (TREE_TYPE (node
)) != RECORD_TYPE
5326 && TREE_CODE (TREE_TYPE (node
)) != UNION_TYPE
)
5328 *no_add_attrs
= true;
5329 warning (OPT_Wattributes
, "%qE attribute ignored",
5334 is_dllimport
= is_attribute_p ("dllimport", name
);
5336 /* Report error on dllimport ambiguities seen now before they cause
5340 /* Honor any target-specific overrides. */
5341 if (!targetm
.valid_dllimport_attribute_p (node
))
5342 *no_add_attrs
= true;
5344 else if (TREE_CODE (node
) == FUNCTION_DECL
5345 && DECL_DECLARED_INLINE_P (node
))
5347 warning (OPT_Wattributes
, "inline function %q+D declared as "
5348 " dllimport: attribute ignored", node
);
5349 *no_add_attrs
= true;
5351 /* Like MS, treat definition of dllimported variables and
5352 non-inlined functions on declaration as syntax errors. */
5353 else if (TREE_CODE (node
) == FUNCTION_DECL
&& DECL_INITIAL (node
))
5355 error ("function %q+D definition is marked dllimport", node
);
5356 *no_add_attrs
= true;
5359 else if (TREE_CODE (node
) == VAR_DECL
)
5361 if (DECL_INITIAL (node
))
5363 error ("variable %q+D definition is marked dllimport",
5365 *no_add_attrs
= true;
5368 /* `extern' needn't be specified with dllimport.
5369 Specify `extern' now and hope for the best. Sigh. */
5370 DECL_EXTERNAL (node
) = 1;
5371 /* Also, implicitly give dllimport'd variables declared within
5372 a function global scope, unless declared static. */
5373 if (current_function_decl
!= NULL_TREE
&& !TREE_STATIC (node
))
5374 TREE_PUBLIC (node
) = 1;
5377 if (*no_add_attrs
== false)
5378 DECL_DLLIMPORT_P (node
) = 1;
5380 else if (TREE_CODE (node
) == FUNCTION_DECL
5381 && DECL_DECLARED_INLINE_P (node
))
5382 /* An exported function, even if inline, must be emitted. */
5383 DECL_EXTERNAL (node
) = 0;
5385 /* Report error if symbol is not accessible at global scope. */
5386 if (!TREE_PUBLIC (node
)
5387 && (TREE_CODE (node
) == VAR_DECL
5388 || TREE_CODE (node
) == FUNCTION_DECL
))
5390 error ("external linkage required for symbol %q+D because of "
5391 "%qE attribute", node
, name
);
5392 *no_add_attrs
= true;
5395 /* A dllexport'd entity must have default visibility so that other
5396 program units (shared libraries or the main executable) can see
5397 it. A dllimport'd entity must have default visibility so that
5398 the linker knows that undefined references within this program
5399 unit can be resolved by the dynamic linker. */
5402 if (DECL_VISIBILITY_SPECIFIED (node
)
5403 && DECL_VISIBILITY (node
) != VISIBILITY_DEFAULT
)
5404 error ("%qE implies default visibility, but %qD has already "
5405 "been declared with a different visibility",
5407 DECL_VISIBILITY (node
) = VISIBILITY_DEFAULT
;
5408 DECL_VISIBILITY_SPECIFIED (node
) = 1;
5414 #endif /* TARGET_DLLIMPORT_DECL_ATTRIBUTES */
5416 /* Set the type qualifiers for TYPE to TYPE_QUALS, which is a bitmask
5417 of the various TYPE_QUAL values. */
5420 set_type_quals (tree type
, int type_quals
)
5422 TYPE_READONLY (type
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
5423 TYPE_VOLATILE (type
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
5424 TYPE_RESTRICT (type
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
5425 TYPE_ADDR_SPACE (type
) = DECODE_QUAL_ADDR_SPACE (type_quals
);
5428 /* Returns true iff CAND is equivalent to BASE with TYPE_QUALS. */
5431 check_qualified_type (const_tree cand
, const_tree base
, int type_quals
)
5433 return (TYPE_QUALS (cand
) == type_quals
5434 && TYPE_NAME (cand
) == TYPE_NAME (base
)
5435 /* Apparently this is needed for Objective-C. */
5436 && TYPE_CONTEXT (cand
) == TYPE_CONTEXT (base
)
5437 && attribute_list_equal (TYPE_ATTRIBUTES (cand
),
5438 TYPE_ATTRIBUTES (base
)));
5441 /* Return a version of the TYPE, qualified as indicated by the
5442 TYPE_QUALS, if one exists. If no qualified version exists yet,
5443 return NULL_TREE. */
5446 get_qualified_type (tree type
, int type_quals
)
5450 if (TYPE_QUALS (type
) == type_quals
)
5453 /* Search the chain of variants to see if there is already one there just
5454 like the one we need to have. If so, use that existing one. We must
5455 preserve the TYPE_NAME, since there is code that depends on this. */
5456 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
5457 if (check_qualified_type (t
, type
, type_quals
))
5463 /* Like get_qualified_type, but creates the type if it does not
5464 exist. This function never returns NULL_TREE. */
5467 build_qualified_type (tree type
, int type_quals
)
5471 /* See if we already have the appropriate qualified variant. */
5472 t
= get_qualified_type (type
, type_quals
);
5474 /* If not, build it. */
5477 t
= build_variant_type_copy (type
);
5478 set_type_quals (t
, type_quals
);
5480 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
5481 /* Propagate structural equality. */
5482 SET_TYPE_STRUCTURAL_EQUALITY (t
);
5483 else if (TYPE_CANONICAL (type
) != type
)
5484 /* Build the underlying canonical type, since it is different
5486 TYPE_CANONICAL (t
) = build_qualified_type (TYPE_CANONICAL (type
),
5489 /* T is its own canonical type. */
5490 TYPE_CANONICAL (t
) = t
;
5497 /* Create a new distinct copy of TYPE. The new type is made its own
5498 MAIN_VARIANT. If TYPE requires structural equality checks, the
5499 resulting type requires structural equality checks; otherwise, its
5500 TYPE_CANONICAL points to itself. */
5503 build_distinct_type_copy (tree type
)
5505 tree t
= copy_node (type
);
5507 TYPE_POINTER_TO (t
) = 0;
5508 TYPE_REFERENCE_TO (t
) = 0;
5510 /* Set the canonical type either to a new equivalence class, or
5511 propagate the need for structural equality checks. */
5512 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
5513 SET_TYPE_STRUCTURAL_EQUALITY (t
);
5515 TYPE_CANONICAL (t
) = t
;
5517 /* Make it its own variant. */
5518 TYPE_MAIN_VARIANT (t
) = t
;
5519 TYPE_NEXT_VARIANT (t
) = 0;
5521 /* Note that it is now possible for TYPE_MIN_VALUE to be a value
5522 whose TREE_TYPE is not t. This can also happen in the Ada
5523 frontend when using subtypes. */
5528 /* Create a new variant of TYPE, equivalent but distinct. This is so
5529 the caller can modify it. TYPE_CANONICAL for the return type will
5530 be equivalent to TYPE_CANONICAL of TYPE, indicating that the types
5531 are considered equal by the language itself (or that both types
5532 require structural equality checks). */
5535 build_variant_type_copy (tree type
)
5537 tree t
, m
= TYPE_MAIN_VARIANT (type
);
5539 t
= build_distinct_type_copy (type
);
5541 /* Since we're building a variant, assume that it is a non-semantic
5542 variant. This also propagates TYPE_STRUCTURAL_EQUALITY_P. */
5543 TYPE_CANONICAL (t
) = TYPE_CANONICAL (type
);
5545 /* Add the new type to the chain of variants of TYPE. */
5546 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (m
);
5547 TYPE_NEXT_VARIANT (m
) = t
;
5548 TYPE_MAIN_VARIANT (t
) = m
;
5553 /* Return true if the from tree in both tree maps are equal. */
5556 tree_map_base_eq (const void *va
, const void *vb
)
5558 const struct tree_map_base
*const a
= (const struct tree_map_base
*) va
,
5559 *const b
= (const struct tree_map_base
*) vb
;
5560 return (a
->from
== b
->from
);
5563 /* Hash a from tree in a tree_map. */
5566 tree_map_base_hash (const void *item
)
5568 return htab_hash_pointer (((const struct tree_map_base
*)item
)->from
);
5571 /* Return true if this tree map structure is marked for garbage collection
5572 purposes. We simply return true if the from tree is marked, so that this
5573 structure goes away when the from tree goes away. */
5576 tree_map_base_marked_p (const void *p
)
5578 return ggc_marked_p (((const struct tree_map_base
*) p
)->from
);
5582 tree_map_hash (const void *item
)
5584 return (((const struct tree_map
*) item
)->hash
);
5587 /* Return the initialization priority for DECL. */
5590 decl_init_priority_lookup (tree decl
)
5592 struct tree_priority_map
*h
;
5593 struct tree_map_base in
;
5595 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
5597 h
= (struct tree_priority_map
*) htab_find (init_priority_for_decl
, &in
);
5598 return h
? h
->init
: DEFAULT_INIT_PRIORITY
;
5601 /* Return the finalization priority for DECL. */
5604 decl_fini_priority_lookup (tree decl
)
5606 struct tree_priority_map
*h
;
5607 struct tree_map_base in
;
5609 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
);
5611 h
= (struct tree_priority_map
*) htab_find (init_priority_for_decl
, &in
);
5612 return h
? h
->fini
: DEFAULT_INIT_PRIORITY
;
5615 /* Return the initialization and finalization priority information for
5616 DECL. If there is no previous priority information, a freshly
5617 allocated structure is returned. */
5619 static struct tree_priority_map
*
5620 decl_priority_info (tree decl
)
5622 struct tree_priority_map in
;
5623 struct tree_priority_map
*h
;
5626 in
.base
.from
= decl
;
5627 loc
= htab_find_slot (init_priority_for_decl
, &in
, INSERT
);
5628 h
= (struct tree_priority_map
*) *loc
;
5631 h
= GGC_CNEW (struct tree_priority_map
);
5633 h
->base
.from
= decl
;
5634 h
->init
= DEFAULT_INIT_PRIORITY
;
5635 h
->fini
= DEFAULT_INIT_PRIORITY
;
5641 /* Set the initialization priority for DECL to PRIORITY. */
5644 decl_init_priority_insert (tree decl
, priority_type priority
)
5646 struct tree_priority_map
*h
;
5648 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
5649 h
= decl_priority_info (decl
);
5653 /* Set the finalization priority for DECL to PRIORITY. */
5656 decl_fini_priority_insert (tree decl
, priority_type priority
)
5658 struct tree_priority_map
*h
;
5660 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
);
5661 h
= decl_priority_info (decl
);
5665 /* Print out the statistics for the DECL_DEBUG_EXPR hash table. */
5668 print_debug_expr_statistics (void)
5670 fprintf (stderr
, "DECL_DEBUG_EXPR hash: size %ld, %ld elements, %f collisions\n",
5671 (long) htab_size (debug_expr_for_decl
),
5672 (long) htab_elements (debug_expr_for_decl
),
5673 htab_collisions (debug_expr_for_decl
));
5676 /* Print out the statistics for the DECL_VALUE_EXPR hash table. */
5679 print_value_expr_statistics (void)
5681 fprintf (stderr
, "DECL_VALUE_EXPR hash: size %ld, %ld elements, %f collisions\n",
5682 (long) htab_size (value_expr_for_decl
),
5683 (long) htab_elements (value_expr_for_decl
),
5684 htab_collisions (value_expr_for_decl
));
5687 /* Lookup a debug expression for FROM, and return it if we find one. */
5690 decl_debug_expr_lookup (tree from
)
5692 struct tree_map
*h
, in
;
5693 in
.base
.from
= from
;
5695 h
= (struct tree_map
*) htab_find_with_hash (debug_expr_for_decl
, &in
,
5696 htab_hash_pointer (from
));
5702 /* Insert a mapping FROM->TO in the debug expression hashtable. */
5705 decl_debug_expr_insert (tree from
, tree to
)
5710 h
= GGC_NEW (struct tree_map
);
5711 h
->hash
= htab_hash_pointer (from
);
5712 h
->base
.from
= from
;
5714 loc
= htab_find_slot_with_hash (debug_expr_for_decl
, h
, h
->hash
, INSERT
);
5715 *(struct tree_map
**) loc
= h
;
5718 /* Lookup a value expression for FROM, and return it if we find one. */
5721 decl_value_expr_lookup (tree from
)
5723 struct tree_map
*h
, in
;
5724 in
.base
.from
= from
;
5726 h
= (struct tree_map
*) htab_find_with_hash (value_expr_for_decl
, &in
,
5727 htab_hash_pointer (from
));
5733 /* Insert a mapping FROM->TO in the value expression hashtable. */
5736 decl_value_expr_insert (tree from
, tree to
)
5741 h
= GGC_NEW (struct tree_map
);
5742 h
->hash
= htab_hash_pointer (from
);
5743 h
->base
.from
= from
;
5745 loc
= htab_find_slot_with_hash (value_expr_for_decl
, h
, h
->hash
, INSERT
);
5746 *(struct tree_map
**) loc
= h
;
5749 /* Hashing of types so that we don't make duplicates.
5750 The entry point is `type_hash_canon'. */
5752 /* Compute a hash code for a list of types (chain of TREE_LIST nodes
5753 with types in the TREE_VALUE slots), by adding the hash codes
5754 of the individual types. */
5757 type_hash_list (const_tree list
, hashval_t hashcode
)
5761 for (tail
= list
; tail
; tail
= TREE_CHAIN (tail
))
5762 if (TREE_VALUE (tail
) != error_mark_node
)
5763 hashcode
= iterative_hash_object (TYPE_HASH (TREE_VALUE (tail
)),
5769 /* These are the Hashtable callback functions. */
5771 /* Returns true iff the types are equivalent. */
5774 type_hash_eq (const void *va
, const void *vb
)
5776 const struct type_hash
*const a
= (const struct type_hash
*) va
,
5777 *const b
= (const struct type_hash
*) vb
;
5779 /* First test the things that are the same for all types. */
5780 if (a
->hash
!= b
->hash
5781 || TREE_CODE (a
->type
) != TREE_CODE (b
->type
)
5782 || TREE_TYPE (a
->type
) != TREE_TYPE (b
->type
)
5783 || !attribute_list_equal (TYPE_ATTRIBUTES (a
->type
),
5784 TYPE_ATTRIBUTES (b
->type
))
5785 || TYPE_ALIGN (a
->type
) != TYPE_ALIGN (b
->type
)
5786 || TYPE_MODE (a
->type
) != TYPE_MODE (b
->type
)
5787 || (TREE_CODE (a
->type
) != COMPLEX_TYPE
5788 && TYPE_NAME (a
->type
) != TYPE_NAME (b
->type
)))
5791 switch (TREE_CODE (a
->type
))
5796 case REFERENCE_TYPE
:
5800 return TYPE_VECTOR_SUBPARTS (a
->type
) == TYPE_VECTOR_SUBPARTS (b
->type
);
5803 if (TYPE_VALUES (a
->type
) != TYPE_VALUES (b
->type
)
5804 && !(TYPE_VALUES (a
->type
)
5805 && TREE_CODE (TYPE_VALUES (a
->type
)) == TREE_LIST
5806 && TYPE_VALUES (b
->type
)
5807 && TREE_CODE (TYPE_VALUES (b
->type
)) == TREE_LIST
5808 && type_list_equal (TYPE_VALUES (a
->type
),
5809 TYPE_VALUES (b
->type
))))
5812 /* ... fall through ... */
5817 return ((TYPE_MAX_VALUE (a
->type
) == TYPE_MAX_VALUE (b
->type
)
5818 || tree_int_cst_equal (TYPE_MAX_VALUE (a
->type
),
5819 TYPE_MAX_VALUE (b
->type
)))
5820 && (TYPE_MIN_VALUE (a
->type
) == TYPE_MIN_VALUE (b
->type
)
5821 || tree_int_cst_equal (TYPE_MIN_VALUE (a
->type
),
5822 TYPE_MIN_VALUE (b
->type
))));
5824 case FIXED_POINT_TYPE
:
5825 return TYPE_SATURATING (a
->type
) == TYPE_SATURATING (b
->type
);
5828 return TYPE_OFFSET_BASETYPE (a
->type
) == TYPE_OFFSET_BASETYPE (b
->type
);
5831 return (TYPE_METHOD_BASETYPE (a
->type
) == TYPE_METHOD_BASETYPE (b
->type
)
5832 && (TYPE_ARG_TYPES (a
->type
) == TYPE_ARG_TYPES (b
->type
)
5833 || (TYPE_ARG_TYPES (a
->type
)
5834 && TREE_CODE (TYPE_ARG_TYPES (a
->type
)) == TREE_LIST
5835 && TYPE_ARG_TYPES (b
->type
)
5836 && TREE_CODE (TYPE_ARG_TYPES (b
->type
)) == TREE_LIST
5837 && type_list_equal (TYPE_ARG_TYPES (a
->type
),
5838 TYPE_ARG_TYPES (b
->type
)))));
5841 return TYPE_DOMAIN (a
->type
) == TYPE_DOMAIN (b
->type
);
5845 case QUAL_UNION_TYPE
:
5846 return (TYPE_FIELDS (a
->type
) == TYPE_FIELDS (b
->type
)
5847 || (TYPE_FIELDS (a
->type
)
5848 && TREE_CODE (TYPE_FIELDS (a
->type
)) == TREE_LIST
5849 && TYPE_FIELDS (b
->type
)
5850 && TREE_CODE (TYPE_FIELDS (b
->type
)) == TREE_LIST
5851 && type_list_equal (TYPE_FIELDS (a
->type
),
5852 TYPE_FIELDS (b
->type
))));
5855 if (TYPE_ARG_TYPES (a
->type
) == TYPE_ARG_TYPES (b
->type
)
5856 || (TYPE_ARG_TYPES (a
->type
)
5857 && TREE_CODE (TYPE_ARG_TYPES (a
->type
)) == TREE_LIST
5858 && TYPE_ARG_TYPES (b
->type
)
5859 && TREE_CODE (TYPE_ARG_TYPES (b
->type
)) == TREE_LIST
5860 && type_list_equal (TYPE_ARG_TYPES (a
->type
),
5861 TYPE_ARG_TYPES (b
->type
))))
5869 if (lang_hooks
.types
.type_hash_eq
!= NULL
)
5870 return lang_hooks
.types
.type_hash_eq (a
->type
, b
->type
);
5875 /* Return the cached hash value. */
5878 type_hash_hash (const void *item
)
5880 return ((const struct type_hash
*) item
)->hash
;
5883 /* Look in the type hash table for a type isomorphic to TYPE.
5884 If one is found, return it. Otherwise return 0. */
5887 type_hash_lookup (hashval_t hashcode
, tree type
)
5889 struct type_hash
*h
, in
;
5891 /* The TYPE_ALIGN field of a type is set by layout_type(), so we
5892 must call that routine before comparing TYPE_ALIGNs. */
5898 h
= (struct type_hash
*) htab_find_with_hash (type_hash_table
, &in
,
5905 /* Add an entry to the type-hash-table
5906 for a type TYPE whose hash code is HASHCODE. */
5909 type_hash_add (hashval_t hashcode
, tree type
)
5911 struct type_hash
*h
;
5914 h
= GGC_NEW (struct type_hash
);
5917 loc
= htab_find_slot_with_hash (type_hash_table
, h
, hashcode
, INSERT
);
5921 /* Given TYPE, and HASHCODE its hash code, return the canonical
5922 object for an identical type if one already exists.
5923 Otherwise, return TYPE, and record it as the canonical object.
5925 To use this function, first create a type of the sort you want.
5926 Then compute its hash code from the fields of the type that
5927 make it different from other similar types.
5928 Then call this function and use the value. */
5931 type_hash_canon (unsigned int hashcode
, tree type
)
5935 /* The hash table only contains main variants, so ensure that's what we're
5937 gcc_assert (TYPE_MAIN_VARIANT (type
) == type
);
5939 if (!lang_hooks
.types
.hash_types
)
5942 /* See if the type is in the hash table already. If so, return it.
5943 Otherwise, add the type. */
5944 t1
= type_hash_lookup (hashcode
, type
);
5947 #ifdef GATHER_STATISTICS
5948 tree_node_counts
[(int) t_kind
]--;
5949 tree_node_sizes
[(int) t_kind
] -= sizeof (struct tree_type
);
5955 type_hash_add (hashcode
, type
);
5960 /* See if the data pointed to by the type hash table is marked. We consider
5961 it marked if the type is marked or if a debug type number or symbol
5962 table entry has been made for the type. This reduces the amount of
5963 debugging output and eliminates that dependency of the debug output on
5964 the number of garbage collections. */
5967 type_hash_marked_p (const void *p
)
5969 const_tree
const type
= ((const struct type_hash
*) p
)->type
;
5971 return ggc_marked_p (type
) || TYPE_SYMTAB_POINTER (type
);
5975 print_type_hash_statistics (void)
5977 fprintf (stderr
, "Type hash: size %ld, %ld elements, %f collisions\n",
5978 (long) htab_size (type_hash_table
),
5979 (long) htab_elements (type_hash_table
),
5980 htab_collisions (type_hash_table
));
5983 /* Compute a hash code for a list of attributes (chain of TREE_LIST nodes
5984 with names in the TREE_PURPOSE slots and args in the TREE_VALUE slots),
5985 by adding the hash codes of the individual attributes. */
5988 attribute_hash_list (const_tree list
, hashval_t hashcode
)
5992 for (tail
= list
; tail
; tail
= TREE_CHAIN (tail
))
5993 /* ??? Do we want to add in TREE_VALUE too? */
5994 hashcode
= iterative_hash_object
5995 (IDENTIFIER_HASH_VALUE (TREE_PURPOSE (tail
)), hashcode
);
5999 /* Given two lists of attributes, return true if list l2 is
6000 equivalent to l1. */
6003 attribute_list_equal (const_tree l1
, const_tree l2
)
6005 return attribute_list_contained (l1
, l2
)
6006 && attribute_list_contained (l2
, l1
);
6009 /* Given two lists of attributes, return true if list L2 is
6010 completely contained within L1. */
6011 /* ??? This would be faster if attribute names were stored in a canonicalized
6012 form. Otherwise, if L1 uses `foo' and L2 uses `__foo__', the long method
6013 must be used to show these elements are equivalent (which they are). */
6014 /* ??? It's not clear that attributes with arguments will always be handled
6018 attribute_list_contained (const_tree l1
, const_tree l2
)
6022 /* First check the obvious, maybe the lists are identical. */
6026 /* Maybe the lists are similar. */
6027 for (t1
= l1
, t2
= l2
;
6029 && TREE_PURPOSE (t1
) == TREE_PURPOSE (t2
)
6030 && TREE_VALUE (t1
) == TREE_VALUE (t2
);
6031 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
));
6033 /* Maybe the lists are equal. */
6034 if (t1
== 0 && t2
== 0)
6037 for (; t2
!= 0; t2
= TREE_CHAIN (t2
))
6040 /* This CONST_CAST is okay because lookup_attribute does not
6041 modify its argument and the return value is assigned to a
6043 for (attr
= lookup_attribute (IDENTIFIER_POINTER (TREE_PURPOSE (t2
)),
6044 CONST_CAST_TREE(l1
));
6046 attr
= lookup_attribute (IDENTIFIER_POINTER (TREE_PURPOSE (t2
)),
6049 if (TREE_VALUE (t2
) != NULL
6050 && TREE_CODE (TREE_VALUE (t2
)) == TREE_LIST
6051 && TREE_VALUE (attr
) != NULL
6052 && TREE_CODE (TREE_VALUE (attr
)) == TREE_LIST
)
6054 if (simple_cst_list_equal (TREE_VALUE (t2
),
6055 TREE_VALUE (attr
)) == 1)
6058 else if (simple_cst_equal (TREE_VALUE (t2
), TREE_VALUE (attr
)) == 1)
6069 /* Given two lists of types
6070 (chains of TREE_LIST nodes with types in the TREE_VALUE slots)
6071 return 1 if the lists contain the same types in the same order.
6072 Also, the TREE_PURPOSEs must match. */
6075 type_list_equal (const_tree l1
, const_tree l2
)
6079 for (t1
= l1
, t2
= l2
; t1
&& t2
; t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
6080 if (TREE_VALUE (t1
) != TREE_VALUE (t2
)
6081 || (TREE_PURPOSE (t1
) != TREE_PURPOSE (t2
)
6082 && ! (1 == simple_cst_equal (TREE_PURPOSE (t1
), TREE_PURPOSE (t2
))
6083 && (TREE_TYPE (TREE_PURPOSE (t1
))
6084 == TREE_TYPE (TREE_PURPOSE (t2
))))))
6090 /* Returns the number of arguments to the FUNCTION_TYPE or METHOD_TYPE
6091 given by TYPE. If the argument list accepts variable arguments,
6092 then this function counts only the ordinary arguments. */
6095 type_num_arguments (const_tree type
)
6100 for (t
= TYPE_ARG_TYPES (type
); t
; t
= TREE_CHAIN (t
))
6101 /* If the function does not take a variable number of arguments,
6102 the last element in the list will have type `void'. */
6103 if (VOID_TYPE_P (TREE_VALUE (t
)))
6111 /* Nonzero if integer constants T1 and T2
6112 represent the same constant value. */
6115 tree_int_cst_equal (const_tree t1
, const_tree t2
)
6120 if (t1
== 0 || t2
== 0)
6123 if (TREE_CODE (t1
) == INTEGER_CST
6124 && TREE_CODE (t2
) == INTEGER_CST
6125 && TREE_INT_CST_LOW (t1
) == TREE_INT_CST_LOW (t2
)
6126 && TREE_INT_CST_HIGH (t1
) == TREE_INT_CST_HIGH (t2
))
6132 /* Nonzero if integer constants T1 and T2 represent values that satisfy <.
6133 The precise way of comparison depends on their data type. */
6136 tree_int_cst_lt (const_tree t1
, const_tree t2
)
6141 if (TYPE_UNSIGNED (TREE_TYPE (t1
)) != TYPE_UNSIGNED (TREE_TYPE (t2
)))
6143 int t1_sgn
= tree_int_cst_sgn (t1
);
6144 int t2_sgn
= tree_int_cst_sgn (t2
);
6146 if (t1_sgn
< t2_sgn
)
6148 else if (t1_sgn
> t2_sgn
)
6150 /* Otherwise, both are non-negative, so we compare them as
6151 unsigned just in case one of them would overflow a signed
6154 else if (!TYPE_UNSIGNED (TREE_TYPE (t1
)))
6155 return INT_CST_LT (t1
, t2
);
6157 return INT_CST_LT_UNSIGNED (t1
, t2
);
6160 /* Returns -1 if T1 < T2, 0 if T1 == T2, and 1 if T1 > T2. */
6163 tree_int_cst_compare (const_tree t1
, const_tree t2
)
6165 if (tree_int_cst_lt (t1
, t2
))
6167 else if (tree_int_cst_lt (t2
, t1
))
6173 /* Return 1 if T is an INTEGER_CST that can be manipulated efficiently on
6174 the host. If POS is zero, the value can be represented in a single
6175 HOST_WIDE_INT. If POS is nonzero, the value must be non-negative and can
6176 be represented in a single unsigned HOST_WIDE_INT. */
6179 host_integerp (const_tree t
, int pos
)
6184 return (TREE_CODE (t
) == INTEGER_CST
6185 && ((TREE_INT_CST_HIGH (t
) == 0
6186 && (HOST_WIDE_INT
) TREE_INT_CST_LOW (t
) >= 0)
6187 || (! pos
&& TREE_INT_CST_HIGH (t
) == -1
6188 && (HOST_WIDE_INT
) TREE_INT_CST_LOW (t
) < 0
6189 && (!TYPE_UNSIGNED (TREE_TYPE (t
))
6190 || (TREE_CODE (TREE_TYPE (t
)) == INTEGER_TYPE
6191 && TYPE_IS_SIZETYPE (TREE_TYPE (t
)))))
6192 || (pos
&& TREE_INT_CST_HIGH (t
) == 0)));
6195 /* Return the HOST_WIDE_INT least significant bits of T if it is an
6196 INTEGER_CST and there is no overflow. POS is nonzero if the result must
6197 be non-negative. We must be able to satisfy the above conditions. */
6200 tree_low_cst (const_tree t
, int pos
)
6202 gcc_assert (host_integerp (t
, pos
));
6203 return TREE_INT_CST_LOW (t
);
6206 /* Return the most significant bit of the integer constant T. */
6209 tree_int_cst_msb (const_tree t
)
6213 unsigned HOST_WIDE_INT l
;
6215 /* Note that using TYPE_PRECISION here is wrong. We care about the
6216 actual bits, not the (arbitrary) range of the type. */
6217 prec
= GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (t
))) - 1;
6218 rshift_double (TREE_INT_CST_LOW (t
), TREE_INT_CST_HIGH (t
), prec
,
6219 2 * HOST_BITS_PER_WIDE_INT
, &l
, &h
, 0);
6220 return (l
& 1) == 1;
6223 /* Return an indication of the sign of the integer constant T.
6224 The return value is -1 if T < 0, 0 if T == 0, and 1 if T > 0.
6225 Note that -1 will never be returned if T's type is unsigned. */
6228 tree_int_cst_sgn (const_tree t
)
6230 if (TREE_INT_CST_LOW (t
) == 0 && TREE_INT_CST_HIGH (t
) == 0)
6232 else if (TYPE_UNSIGNED (TREE_TYPE (t
)))
6234 else if (TREE_INT_CST_HIGH (t
) < 0)
6240 /* Return the minimum number of bits needed to represent VALUE in a
6241 signed or unsigned type, UNSIGNEDP says which. */
6244 tree_int_cst_min_precision (tree value
, bool unsignedp
)
6248 /* If the value is negative, compute its negative minus 1. The latter
6249 adjustment is because the absolute value of the largest negative value
6250 is one larger than the largest positive value. This is equivalent to
6251 a bit-wise negation, so use that operation instead. */
6253 if (tree_int_cst_sgn (value
) < 0)
6254 value
= fold_build1 (BIT_NOT_EXPR
, TREE_TYPE (value
), value
);
6256 /* Return the number of bits needed, taking into account the fact
6257 that we need one more bit for a signed than unsigned type. */
6259 if (integer_zerop (value
))
6262 log
= tree_floor_log2 (value
);
6264 return log
+ 1 + !unsignedp
;
6267 /* Compare two constructor-element-type constants. Return 1 if the lists
6268 are known to be equal; otherwise return 0. */
6271 simple_cst_list_equal (const_tree l1
, const_tree l2
)
6273 while (l1
!= NULL_TREE
&& l2
!= NULL_TREE
)
6275 if (simple_cst_equal (TREE_VALUE (l1
), TREE_VALUE (l2
)) != 1)
6278 l1
= TREE_CHAIN (l1
);
6279 l2
= TREE_CHAIN (l2
);
6285 /* Return truthvalue of whether T1 is the same tree structure as T2.
6286 Return 1 if they are the same.
6287 Return 0 if they are understandably different.
6288 Return -1 if either contains tree structure not understood by
6292 simple_cst_equal (const_tree t1
, const_tree t2
)
6294 enum tree_code code1
, code2
;
6300 if (t1
== 0 || t2
== 0)
6303 code1
= TREE_CODE (t1
);
6304 code2
= TREE_CODE (t2
);
6306 if (CONVERT_EXPR_CODE_P (code1
) || code1
== NON_LVALUE_EXPR
)
6308 if (CONVERT_EXPR_CODE_P (code2
)
6309 || code2
== NON_LVALUE_EXPR
)
6310 return simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
6312 return simple_cst_equal (TREE_OPERAND (t1
, 0), t2
);
6315 else if (CONVERT_EXPR_CODE_P (code2
)
6316 || code2
== NON_LVALUE_EXPR
)
6317 return simple_cst_equal (t1
, TREE_OPERAND (t2
, 0));
6325 return (TREE_INT_CST_LOW (t1
) == TREE_INT_CST_LOW (t2
)
6326 && TREE_INT_CST_HIGH (t1
) == TREE_INT_CST_HIGH (t2
));
6329 return REAL_VALUES_IDENTICAL (TREE_REAL_CST (t1
), TREE_REAL_CST (t2
));
6332 return FIXED_VALUES_IDENTICAL (TREE_FIXED_CST (t1
), TREE_FIXED_CST (t2
));
6335 return (TREE_STRING_LENGTH (t1
) == TREE_STRING_LENGTH (t2
)
6336 && ! memcmp (TREE_STRING_POINTER (t1
), TREE_STRING_POINTER (t2
),
6337 TREE_STRING_LENGTH (t1
)));
6341 unsigned HOST_WIDE_INT idx
;
6342 VEC(constructor_elt
, gc
) *v1
= CONSTRUCTOR_ELTS (t1
);
6343 VEC(constructor_elt
, gc
) *v2
= CONSTRUCTOR_ELTS (t2
);
6345 if (VEC_length (constructor_elt
, v1
) != VEC_length (constructor_elt
, v2
))
6348 for (idx
= 0; idx
< VEC_length (constructor_elt
, v1
); ++idx
)
6349 /* ??? Should we handle also fields here? */
6350 if (!simple_cst_equal (VEC_index (constructor_elt
, v1
, idx
)->value
,
6351 VEC_index (constructor_elt
, v2
, idx
)->value
))
6357 return simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
6360 cmp
= simple_cst_equal (CALL_EXPR_FN (t1
), CALL_EXPR_FN (t2
));
6363 if (call_expr_nargs (t1
) != call_expr_nargs (t2
))
6366 const_tree arg1
, arg2
;
6367 const_call_expr_arg_iterator iter1
, iter2
;
6368 for (arg1
= first_const_call_expr_arg (t1
, &iter1
),
6369 arg2
= first_const_call_expr_arg (t2
, &iter2
);
6371 arg1
= next_const_call_expr_arg (&iter1
),
6372 arg2
= next_const_call_expr_arg (&iter2
))
6374 cmp
= simple_cst_equal (arg1
, arg2
);
6378 return arg1
== arg2
;
6382 /* Special case: if either target is an unallocated VAR_DECL,
6383 it means that it's going to be unified with whatever the
6384 TARGET_EXPR is really supposed to initialize, so treat it
6385 as being equivalent to anything. */
6386 if ((TREE_CODE (TREE_OPERAND (t1
, 0)) == VAR_DECL
6387 && DECL_NAME (TREE_OPERAND (t1
, 0)) == NULL_TREE
6388 && !DECL_RTL_SET_P (TREE_OPERAND (t1
, 0)))
6389 || (TREE_CODE (TREE_OPERAND (t2
, 0)) == VAR_DECL
6390 && DECL_NAME (TREE_OPERAND (t2
, 0)) == NULL_TREE
6391 && !DECL_RTL_SET_P (TREE_OPERAND (t2
, 0))))
6394 cmp
= simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
6399 return simple_cst_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t2
, 1));
6401 case WITH_CLEANUP_EXPR
:
6402 cmp
= simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
6406 return simple_cst_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t1
, 1));
6409 if (TREE_OPERAND (t1
, 1) == TREE_OPERAND (t2
, 1))
6410 return simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
6424 /* This general rule works for most tree codes. All exceptions should be
6425 handled above. If this is a language-specific tree code, we can't
6426 trust what might be in the operand, so say we don't know
6428 if ((int) code1
>= (int) LAST_AND_UNUSED_TREE_CODE
)
6431 switch (TREE_CODE_CLASS (code1
))
6435 case tcc_comparison
:
6436 case tcc_expression
:
6440 for (i
= 0; i
< TREE_CODE_LENGTH (code1
); i
++)
6442 cmp
= simple_cst_equal (TREE_OPERAND (t1
, i
), TREE_OPERAND (t2
, i
));
6454 /* Compare the value of T, an INTEGER_CST, with U, an unsigned integer value.
6455 Return -1, 0, or 1 if the value of T is less than, equal to, or greater
6456 than U, respectively. */
6459 compare_tree_int (const_tree t
, unsigned HOST_WIDE_INT u
)
6461 if (tree_int_cst_sgn (t
) < 0)
6463 else if (TREE_INT_CST_HIGH (t
) != 0)
6465 else if (TREE_INT_CST_LOW (t
) == u
)
6467 else if (TREE_INT_CST_LOW (t
) < u
)
6473 /* Return true if CODE represents an associative tree code. Otherwise
6476 associative_tree_code (enum tree_code code
)
6495 /* Return true if CODE represents a commutative tree code. Otherwise
6498 commutative_tree_code (enum tree_code code
)
6511 case UNORDERED_EXPR
:
6515 case TRUTH_AND_EXPR
:
6516 case TRUTH_XOR_EXPR
:
6526 /* Generate a hash value for an expression. This can be used iteratively
6527 by passing a previous result as the VAL argument.
6529 This function is intended to produce the same hash for expressions which
6530 would compare equal using operand_equal_p. */
6533 iterative_hash_expr (const_tree t
, hashval_t val
)
6536 enum tree_code code
;
6540 return iterative_hash_hashval_t (0, val
);
6542 code
= TREE_CODE (t
);
6546 /* Alas, constants aren't shared, so we can't rely on pointer
6549 val
= iterative_hash_host_wide_int (TREE_INT_CST_LOW (t
), val
);
6550 return iterative_hash_host_wide_int (TREE_INT_CST_HIGH (t
), val
);
6553 unsigned int val2
= real_hash (TREE_REAL_CST_PTR (t
));
6555 return iterative_hash_hashval_t (val2
, val
);
6559 unsigned int val2
= fixed_hash (TREE_FIXED_CST_PTR (t
));
6561 return iterative_hash_hashval_t (val2
, val
);
6564 return iterative_hash (TREE_STRING_POINTER (t
),
6565 TREE_STRING_LENGTH (t
), val
);
6567 val
= iterative_hash_expr (TREE_REALPART (t
), val
);
6568 return iterative_hash_expr (TREE_IMAGPART (t
), val
);
6570 return iterative_hash_expr (TREE_VECTOR_CST_ELTS (t
), val
);
6573 /* we can just compare by pointer. */
6574 return iterative_hash_host_wide_int (SSA_NAME_VERSION (t
), val
);
6577 /* A list of expressions, for a CALL_EXPR or as the elements of a
6579 for (; t
; t
= TREE_CHAIN (t
))
6580 val
= iterative_hash_expr (TREE_VALUE (t
), val
);
6584 unsigned HOST_WIDE_INT idx
;
6586 FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (t
), idx
, field
, value
)
6588 val
= iterative_hash_expr (field
, val
);
6589 val
= iterative_hash_expr (value
, val
);
6594 /* When referring to a built-in FUNCTION_DECL, use the __builtin__ form.
6595 Otherwise nodes that compare equal according to operand_equal_p might
6596 get different hash codes. However, don't do this for machine specific
6597 or front end builtins, since the function code is overloaded in those
6599 if (DECL_BUILT_IN_CLASS (t
) == BUILT_IN_NORMAL
6600 && built_in_decls
[DECL_FUNCTION_CODE (t
)])
6602 t
= built_in_decls
[DECL_FUNCTION_CODE (t
)];
6603 code
= TREE_CODE (t
);
6607 tclass
= TREE_CODE_CLASS (code
);
6609 if (tclass
== tcc_declaration
)
6611 /* DECL's have a unique ID */
6612 val
= iterative_hash_host_wide_int (DECL_UID (t
), val
);
6616 gcc_assert (IS_EXPR_CODE_CLASS (tclass
));
6618 val
= iterative_hash_object (code
, val
);
6620 /* Don't hash the type, that can lead to having nodes which
6621 compare equal according to operand_equal_p, but which
6622 have different hash codes. */
6623 if (CONVERT_EXPR_CODE_P (code
)
6624 || code
== NON_LVALUE_EXPR
)
6626 /* Make sure to include signness in the hash computation. */
6627 val
+= TYPE_UNSIGNED (TREE_TYPE (t
));
6628 val
= iterative_hash_expr (TREE_OPERAND (t
, 0), val
);
6631 else if (commutative_tree_code (code
))
6633 /* It's a commutative expression. We want to hash it the same
6634 however it appears. We do this by first hashing both operands
6635 and then rehashing based on the order of their independent
6637 hashval_t one
= iterative_hash_expr (TREE_OPERAND (t
, 0), 0);
6638 hashval_t two
= iterative_hash_expr (TREE_OPERAND (t
, 1), 0);
6642 t
= one
, one
= two
, two
= t
;
6644 val
= iterative_hash_hashval_t (one
, val
);
6645 val
= iterative_hash_hashval_t (two
, val
);
6648 for (i
= TREE_OPERAND_LENGTH (t
) - 1; i
>= 0; --i
)
6649 val
= iterative_hash_expr (TREE_OPERAND (t
, i
), val
);
6656 /* Generate a hash value for a pair of expressions. This can be used
6657 iteratively by passing a previous result as the VAL argument.
6659 The same hash value is always returned for a given pair of expressions,
6660 regardless of the order in which they are presented. This is useful in
6661 hashing the operands of commutative functions. */
6664 iterative_hash_exprs_commutative (const_tree t1
,
6665 const_tree t2
, hashval_t val
)
6667 hashval_t one
= iterative_hash_expr (t1
, 0);
6668 hashval_t two
= iterative_hash_expr (t2
, 0);
6672 t
= one
, one
= two
, two
= t
;
6673 val
= iterative_hash_hashval_t (one
, val
);
6674 val
= iterative_hash_hashval_t (two
, val
);
6679 /* Constructors for pointer, array and function types.
6680 (RECORD_TYPE, UNION_TYPE and ENUMERAL_TYPE nodes are
6681 constructed by language-dependent code, not here.) */
6683 /* Construct, lay out and return the type of pointers to TO_TYPE with
6684 mode MODE. If CAN_ALIAS_ALL is TRUE, indicate this type can
6685 reference all of memory. If such a type has already been
6686 constructed, reuse it. */
6689 build_pointer_type_for_mode (tree to_type
, enum machine_mode mode
,
6694 if (to_type
== error_mark_node
)
6695 return error_mark_node
;
6697 /* If the pointed-to type has the may_alias attribute set, force
6698 a TYPE_REF_CAN_ALIAS_ALL pointer to be generated. */
6699 if (lookup_attribute ("may_alias", TYPE_ATTRIBUTES (to_type
)))
6700 can_alias_all
= true;
6702 /* In some cases, languages will have things that aren't a POINTER_TYPE
6703 (such as a RECORD_TYPE for fat pointers in Ada) as TYPE_POINTER_TO.
6704 In that case, return that type without regard to the rest of our
6707 ??? This is a kludge, but consistent with the way this function has
6708 always operated and there doesn't seem to be a good way to avoid this
6710 if (TYPE_POINTER_TO (to_type
) != 0
6711 && TREE_CODE (TYPE_POINTER_TO (to_type
)) != POINTER_TYPE
)
6712 return TYPE_POINTER_TO (to_type
);
6714 /* First, if we already have a type for pointers to TO_TYPE and it's
6715 the proper mode, use it. */
6716 for (t
= TYPE_POINTER_TO (to_type
); t
; t
= TYPE_NEXT_PTR_TO (t
))
6717 if (TYPE_MODE (t
) == mode
&& TYPE_REF_CAN_ALIAS_ALL (t
) == can_alias_all
)
6720 t
= make_node (POINTER_TYPE
);
6722 TREE_TYPE (t
) = to_type
;
6723 SET_TYPE_MODE (t
, mode
);
6724 TYPE_REF_CAN_ALIAS_ALL (t
) = can_alias_all
;
6725 TYPE_NEXT_PTR_TO (t
) = TYPE_POINTER_TO (to_type
);
6726 TYPE_POINTER_TO (to_type
) = t
;
6728 if (TYPE_STRUCTURAL_EQUALITY_P (to_type
))
6729 SET_TYPE_STRUCTURAL_EQUALITY (t
);
6730 else if (TYPE_CANONICAL (to_type
) != to_type
)
6732 = build_pointer_type_for_mode (TYPE_CANONICAL (to_type
),
6733 mode
, can_alias_all
);
6735 /* Lay out the type. This function has many callers that are concerned
6736 with expression-construction, and this simplifies them all. */
6742 /* By default build pointers in ptr_mode. */
6745 build_pointer_type (tree to_type
)
6747 addr_space_t as
= to_type
== error_mark_node
? ADDR_SPACE_GENERIC
6748 : TYPE_ADDR_SPACE (to_type
);
6749 enum machine_mode pointer_mode
= targetm
.addr_space
.pointer_mode (as
);
6750 return build_pointer_type_for_mode (to_type
, pointer_mode
, false);
6753 /* Same as build_pointer_type_for_mode, but for REFERENCE_TYPE. */
6756 build_reference_type_for_mode (tree to_type
, enum machine_mode mode
,
6761 if (to_type
== error_mark_node
)
6762 return error_mark_node
;
6764 /* If the pointed-to type has the may_alias attribute set, force
6765 a TYPE_REF_CAN_ALIAS_ALL pointer to be generated. */
6766 if (lookup_attribute ("may_alias", TYPE_ATTRIBUTES (to_type
)))
6767 can_alias_all
= true;
6769 /* In some cases, languages will have things that aren't a REFERENCE_TYPE
6770 (such as a RECORD_TYPE for fat pointers in Ada) as TYPE_REFERENCE_TO.
6771 In that case, return that type without regard to the rest of our
6774 ??? This is a kludge, but consistent with the way this function has
6775 always operated and there doesn't seem to be a good way to avoid this
6777 if (TYPE_REFERENCE_TO (to_type
) != 0
6778 && TREE_CODE (TYPE_REFERENCE_TO (to_type
)) != REFERENCE_TYPE
)
6779 return TYPE_REFERENCE_TO (to_type
);
6781 /* First, if we already have a type for pointers to TO_TYPE and it's
6782 the proper mode, use it. */
6783 for (t
= TYPE_REFERENCE_TO (to_type
); t
; t
= TYPE_NEXT_REF_TO (t
))
6784 if (TYPE_MODE (t
) == mode
&& TYPE_REF_CAN_ALIAS_ALL (t
) == can_alias_all
)
6787 t
= make_node (REFERENCE_TYPE
);
6789 TREE_TYPE (t
) = to_type
;
6790 SET_TYPE_MODE (t
, mode
);
6791 TYPE_REF_CAN_ALIAS_ALL (t
) = can_alias_all
;
6792 TYPE_NEXT_REF_TO (t
) = TYPE_REFERENCE_TO (to_type
);
6793 TYPE_REFERENCE_TO (to_type
) = t
;
6795 if (TYPE_STRUCTURAL_EQUALITY_P (to_type
))
6796 SET_TYPE_STRUCTURAL_EQUALITY (t
);
6797 else if (TYPE_CANONICAL (to_type
) != to_type
)
6799 = build_reference_type_for_mode (TYPE_CANONICAL (to_type
),
6800 mode
, can_alias_all
);
6808 /* Build the node for the type of references-to-TO_TYPE by default
6812 build_reference_type (tree to_type
)
6814 addr_space_t as
= to_type
== error_mark_node
? ADDR_SPACE_GENERIC
6815 : TYPE_ADDR_SPACE (to_type
);
6816 enum machine_mode pointer_mode
= targetm
.addr_space
.pointer_mode (as
);
6817 return build_reference_type_for_mode (to_type
, pointer_mode
, false);
6820 /* Build a type that is compatible with t but has no cv quals anywhere
6823 const char *const *const * -> char ***. */
6826 build_type_no_quals (tree t
)
6828 switch (TREE_CODE (t
))
6831 return build_pointer_type_for_mode (build_type_no_quals (TREE_TYPE (t
)),
6833 TYPE_REF_CAN_ALIAS_ALL (t
));
6834 case REFERENCE_TYPE
:
6836 build_reference_type_for_mode (build_type_no_quals (TREE_TYPE (t
)),
6838 TYPE_REF_CAN_ALIAS_ALL (t
));
6840 return TYPE_MAIN_VARIANT (t
);
6844 /* Create a type of integers to be the TYPE_DOMAIN of an ARRAY_TYPE.
6845 MAXVAL should be the maximum value in the domain
6846 (one less than the length of the array).
6848 The maximum value that MAXVAL can have is INT_MAX for a HOST_WIDE_INT.
6849 We don't enforce this limit, that is up to caller (e.g. language front end).
6850 The limit exists because the result is a signed type and we don't handle
6851 sizes that use more than one HOST_WIDE_INT. */
6854 build_index_type (tree maxval
)
6856 tree itype
= make_node (INTEGER_TYPE
);
6858 TREE_TYPE (itype
) = sizetype
;
6859 TYPE_PRECISION (itype
) = TYPE_PRECISION (sizetype
);
6860 TYPE_MIN_VALUE (itype
) = size_zero_node
;
6861 TYPE_MAX_VALUE (itype
) = fold_convert (sizetype
, maxval
);
6862 SET_TYPE_MODE (itype
, TYPE_MODE (sizetype
));
6863 TYPE_SIZE (itype
) = TYPE_SIZE (sizetype
);
6864 TYPE_SIZE_UNIT (itype
) = TYPE_SIZE_UNIT (sizetype
);
6865 TYPE_ALIGN (itype
) = TYPE_ALIGN (sizetype
);
6866 TYPE_USER_ALIGN (itype
) = TYPE_USER_ALIGN (sizetype
);
6868 if (host_integerp (maxval
, 1))
6869 return type_hash_canon (tree_low_cst (maxval
, 1), itype
);
6872 /* Since we cannot hash this type, we need to compare it using
6873 structural equality checks. */
6874 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
6879 /* Builds a signed or unsigned integer type of precision PRECISION.
6880 Used for C bitfields whose precision does not match that of
6881 built-in target types. */
6883 build_nonstandard_integer_type (unsigned HOST_WIDE_INT precision
,
6886 tree itype
= make_node (INTEGER_TYPE
);
6888 TYPE_PRECISION (itype
) = precision
;
6891 fixup_unsigned_type (itype
);
6893 fixup_signed_type (itype
);
6895 if (host_integerp (TYPE_MAX_VALUE (itype
), 1))
6896 return type_hash_canon (tree_low_cst (TYPE_MAX_VALUE (itype
), 1), itype
);
6901 /* Create a range of some discrete type TYPE (an INTEGER_TYPE,
6902 ENUMERAL_TYPE or BOOLEAN_TYPE), with low bound LOWVAL and
6903 high bound HIGHVAL. If TYPE is NULL, sizetype is used. */
6906 build_range_type (tree type
, tree lowval
, tree highval
)
6908 tree itype
= make_node (INTEGER_TYPE
);
6910 TREE_TYPE (itype
) = type
;
6911 if (type
== NULL_TREE
)
6914 TYPE_MIN_VALUE (itype
) = fold_convert (type
, lowval
);
6915 TYPE_MAX_VALUE (itype
) = highval
? fold_convert (type
, highval
) : NULL
;
6917 TYPE_PRECISION (itype
) = TYPE_PRECISION (type
);
6918 SET_TYPE_MODE (itype
, TYPE_MODE (type
));
6919 TYPE_SIZE (itype
) = TYPE_SIZE (type
);
6920 TYPE_SIZE_UNIT (itype
) = TYPE_SIZE_UNIT (type
);
6921 TYPE_ALIGN (itype
) = TYPE_ALIGN (type
);
6922 TYPE_USER_ALIGN (itype
) = TYPE_USER_ALIGN (type
);
6924 if (host_integerp (lowval
, 0) && highval
!= 0 && host_integerp (highval
, 0))
6925 return type_hash_canon (tree_low_cst (highval
, 0)
6926 - tree_low_cst (lowval
, 0),
6932 /* Return true if the debug information for TYPE, a subtype, should be emitted
6933 as a subrange type. If so, set LOWVAL to the low bound and HIGHVAL to the
6934 high bound, respectively. Sometimes doing so unnecessarily obfuscates the
6935 debug info and doesn't reflect the source code. */
6938 subrange_type_for_debug_p (const_tree type
, tree
*lowval
, tree
*highval
)
6940 tree base_type
= TREE_TYPE (type
), low
, high
;
6942 /* Subrange types have a base type which is an integral type. */
6943 if (!INTEGRAL_TYPE_P (base_type
))
6946 /* Get the real bounds of the subtype. */
6947 if (lang_hooks
.types
.get_subrange_bounds
)
6948 lang_hooks
.types
.get_subrange_bounds (type
, &low
, &high
);
6951 low
= TYPE_MIN_VALUE (type
);
6952 high
= TYPE_MAX_VALUE (type
);
6955 /* If the type and its base type have the same representation and the same
6956 name, then the type is not a subrange but a copy of the base type. */
6957 if ((TREE_CODE (base_type
) == INTEGER_TYPE
6958 || TREE_CODE (base_type
) == BOOLEAN_TYPE
)
6959 && int_size_in_bytes (type
) == int_size_in_bytes (base_type
)
6960 && tree_int_cst_equal (low
, TYPE_MIN_VALUE (base_type
))
6961 && tree_int_cst_equal (high
, TYPE_MAX_VALUE (base_type
)))
6963 tree type_name
= TYPE_NAME (type
);
6964 tree base_type_name
= TYPE_NAME (base_type
);
6966 if (type_name
&& TREE_CODE (type_name
) == TYPE_DECL
)
6967 type_name
= DECL_NAME (type_name
);
6969 if (base_type_name
&& TREE_CODE (base_type_name
) == TYPE_DECL
)
6970 base_type_name
= DECL_NAME (base_type_name
);
6972 if (type_name
== base_type_name
)
6983 /* Just like build_index_type, but takes lowval and highval instead
6984 of just highval (maxval). */
6987 build_index_2_type (tree lowval
, tree highval
)
6989 return build_range_type (sizetype
, lowval
, highval
);
6992 /* Construct, lay out and return the type of arrays of elements with ELT_TYPE
6993 and number of elements specified by the range of values of INDEX_TYPE.
6994 If such a type has already been constructed, reuse it. */
6997 build_array_type (tree elt_type
, tree index_type
)
7000 hashval_t hashcode
= 0;
7002 if (TREE_CODE (elt_type
) == FUNCTION_TYPE
)
7004 error ("arrays of functions are not meaningful");
7005 elt_type
= integer_type_node
;
7008 t
= make_node (ARRAY_TYPE
);
7009 TREE_TYPE (t
) = elt_type
;
7010 TYPE_DOMAIN (t
) = index_type
;
7011 TYPE_ADDR_SPACE (t
) = TYPE_ADDR_SPACE (elt_type
);
7014 /* If the element type is incomplete at this point we get marked for
7015 structural equality. Do not record these types in the canonical
7017 if (TYPE_STRUCTURAL_EQUALITY_P (t
))
7020 hashcode
= iterative_hash_object (TYPE_HASH (elt_type
), hashcode
);
7022 hashcode
= iterative_hash_object (TYPE_HASH (index_type
), hashcode
);
7023 t
= type_hash_canon (hashcode
, t
);
7025 if (TYPE_CANONICAL (t
) == t
)
7027 if (TYPE_STRUCTURAL_EQUALITY_P (elt_type
)
7028 || (index_type
&& TYPE_STRUCTURAL_EQUALITY_P (index_type
)))
7029 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7030 else if (TYPE_CANONICAL (elt_type
) != elt_type
7031 || (index_type
&& TYPE_CANONICAL (index_type
) != index_type
))
7033 = build_array_type (TYPE_CANONICAL (elt_type
),
7034 index_type
? TYPE_CANONICAL (index_type
) : NULL
);
7040 /* Recursively examines the array elements of TYPE, until a non-array
7041 element type is found. */
7044 strip_array_types (tree type
)
7046 while (TREE_CODE (type
) == ARRAY_TYPE
)
7047 type
= TREE_TYPE (type
);
7052 /* Computes the canonical argument types from the argument type list
7055 Upon return, *ANY_STRUCTURAL_P will be true iff either it was true
7056 on entry to this function, or if any of the ARGTYPES are
7059 Upon return, *ANY_NONCANONICAL_P will be true iff either it was
7060 true on entry to this function, or if any of the ARGTYPES are
7063 Returns a canonical argument list, which may be ARGTYPES when the
7064 canonical argument list is unneeded (i.e., *ANY_STRUCTURAL_P is
7065 true) or would not differ from ARGTYPES. */
7068 maybe_canonicalize_argtypes(tree argtypes
,
7069 bool *any_structural_p
,
7070 bool *any_noncanonical_p
)
7073 bool any_noncanonical_argtypes_p
= false;
7075 for (arg
= argtypes
; arg
&& !(*any_structural_p
); arg
= TREE_CHAIN (arg
))
7077 if (!TREE_VALUE (arg
) || TREE_VALUE (arg
) == error_mark_node
)
7078 /* Fail gracefully by stating that the type is structural. */
7079 *any_structural_p
= true;
7080 else if (TYPE_STRUCTURAL_EQUALITY_P (TREE_VALUE (arg
)))
7081 *any_structural_p
= true;
7082 else if (TYPE_CANONICAL (TREE_VALUE (arg
)) != TREE_VALUE (arg
)
7083 || TREE_PURPOSE (arg
))
7084 /* If the argument has a default argument, we consider it
7085 non-canonical even though the type itself is canonical.
7086 That way, different variants of function and method types
7087 with default arguments will all point to the variant with
7088 no defaults as their canonical type. */
7089 any_noncanonical_argtypes_p
= true;
7092 if (*any_structural_p
)
7095 if (any_noncanonical_argtypes_p
)
7097 /* Build the canonical list of argument types. */
7098 tree canon_argtypes
= NULL_TREE
;
7099 bool is_void
= false;
7101 for (arg
= argtypes
; arg
; arg
= TREE_CHAIN (arg
))
7103 if (arg
== void_list_node
)
7106 canon_argtypes
= tree_cons (NULL_TREE
,
7107 TYPE_CANONICAL (TREE_VALUE (arg
)),
7111 canon_argtypes
= nreverse (canon_argtypes
);
7113 canon_argtypes
= chainon (canon_argtypes
, void_list_node
);
7115 /* There is a non-canonical type. */
7116 *any_noncanonical_p
= true;
7117 return canon_argtypes
;
7120 /* The canonical argument types are the same as ARGTYPES. */
7124 /* Construct, lay out and return
7125 the type of functions returning type VALUE_TYPE
7126 given arguments of types ARG_TYPES.
7127 ARG_TYPES is a chain of TREE_LIST nodes whose TREE_VALUEs
7128 are data type nodes for the arguments of the function.
7129 If such a type has already been constructed, reuse it. */
7132 build_function_type (tree value_type
, tree arg_types
)
7135 hashval_t hashcode
= 0;
7136 bool any_structural_p
, any_noncanonical_p
;
7137 tree canon_argtypes
;
7139 if (TREE_CODE (value_type
) == FUNCTION_TYPE
)
7141 error ("function return type cannot be function");
7142 value_type
= integer_type_node
;
7145 /* Make a node of the sort we want. */
7146 t
= make_node (FUNCTION_TYPE
);
7147 TREE_TYPE (t
) = value_type
;
7148 TYPE_ARG_TYPES (t
) = arg_types
;
7150 /* If we already have such a type, use the old one. */
7151 hashcode
= iterative_hash_object (TYPE_HASH (value_type
), hashcode
);
7152 hashcode
= type_hash_list (arg_types
, hashcode
);
7153 t
= type_hash_canon (hashcode
, t
);
7155 /* Set up the canonical type. */
7156 any_structural_p
= TYPE_STRUCTURAL_EQUALITY_P (value_type
);
7157 any_noncanonical_p
= TYPE_CANONICAL (value_type
) != value_type
;
7158 canon_argtypes
= maybe_canonicalize_argtypes (arg_types
,
7160 &any_noncanonical_p
);
7161 if (any_structural_p
)
7162 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7163 else if (any_noncanonical_p
)
7164 TYPE_CANONICAL (t
) = build_function_type (TYPE_CANONICAL (value_type
),
7167 if (!COMPLETE_TYPE_P (t
))
7172 /* Build variant of function type ORIG_TYPE skipping ARGS_TO_SKIP. */
7175 build_function_type_skip_args (tree orig_type
, bitmap args_to_skip
)
7177 tree new_type
= NULL
;
7178 tree args
, new_args
= NULL
, t
;
7182 for (args
= TYPE_ARG_TYPES (orig_type
); args
&& args
!= void_list_node
;
7183 args
= TREE_CHAIN (args
), i
++)
7184 if (!bitmap_bit_p (args_to_skip
, i
))
7185 new_args
= tree_cons (NULL_TREE
, TREE_VALUE (args
), new_args
);
7187 new_reversed
= nreverse (new_args
);
7191 TREE_CHAIN (new_args
) = void_list_node
;
7193 new_reversed
= void_list_node
;
7196 /* Use copy_node to preserve as much as possible from original type
7197 (debug info, attribute lists etc.)
7198 Exception is METHOD_TYPEs must have THIS argument.
7199 When we are asked to remove it, we need to build new FUNCTION_TYPE
7201 if (TREE_CODE (orig_type
) != METHOD_TYPE
7202 || !bitmap_bit_p (args_to_skip
, 0))
7204 new_type
= copy_node (orig_type
);
7205 TYPE_ARG_TYPES (new_type
) = new_reversed
;
7210 = build_distinct_type_copy (build_function_type (TREE_TYPE (orig_type
),
7212 TYPE_CONTEXT (new_type
) = TYPE_CONTEXT (orig_type
);
7215 /* This is a new type, not a copy of an old type. Need to reassociate
7216 variants. We can handle everything except the main variant lazily. */
7217 t
= TYPE_MAIN_VARIANT (orig_type
);
7220 TYPE_MAIN_VARIANT (new_type
) = t
;
7221 TYPE_NEXT_VARIANT (new_type
) = TYPE_NEXT_VARIANT (t
);
7222 TYPE_NEXT_VARIANT (t
) = new_type
;
7226 TYPE_MAIN_VARIANT (new_type
) = new_type
;
7227 TYPE_NEXT_VARIANT (new_type
) = NULL
;
7232 /* Build variant of function type ORIG_TYPE skipping ARGS_TO_SKIP.
7234 Arguments from DECL_ARGUMENTS list can't be removed now, since they are
7235 linked by TREE_CHAIN directly. It is caller responsibility to eliminate
7236 them when they are being duplicated (i.e. copy_arguments_for_versioning). */
7239 build_function_decl_skip_args (tree orig_decl
, bitmap args_to_skip
)
7241 tree new_decl
= copy_node (orig_decl
);
7244 new_type
= TREE_TYPE (orig_decl
);
7245 if (prototype_p (new_type
))
7246 new_type
= build_function_type_skip_args (new_type
, args_to_skip
);
7247 TREE_TYPE (new_decl
) = new_type
;
7249 /* For declarations setting DECL_VINDEX (i.e. methods)
7250 we expect first argument to be THIS pointer. */
7251 if (bitmap_bit_p (args_to_skip
, 0))
7252 DECL_VINDEX (new_decl
) = NULL_TREE
;
7256 /* Build a function type. The RETURN_TYPE is the type returned by the
7257 function. If VAARGS is set, no void_type_node is appended to the
7258 the list. ARGP muse be alway be terminated be a NULL_TREE. */
7261 build_function_type_list_1 (bool vaargs
, tree return_type
, va_list argp
)
7265 t
= va_arg (argp
, tree
);
7266 for (args
= NULL_TREE
; t
!= NULL_TREE
; t
= va_arg (argp
, tree
))
7267 args
= tree_cons (NULL_TREE
, t
, args
);
7272 if (args
!= NULL_TREE
)
7273 args
= nreverse (args
);
7274 gcc_assert (args
!= NULL_TREE
&& last
!= void_list_node
);
7276 else if (args
== NULL_TREE
)
7277 args
= void_list_node
;
7281 args
= nreverse (args
);
7282 TREE_CHAIN (last
) = void_list_node
;
7284 args
= build_function_type (return_type
, args
);
7289 /* Build a function type. The RETURN_TYPE is the type returned by the
7290 function. If additional arguments are provided, they are
7291 additional argument types. The list of argument types must always
7292 be terminated by NULL_TREE. */
7295 build_function_type_list (tree return_type
, ...)
7300 va_start (p
, return_type
);
7301 args
= build_function_type_list_1 (false, return_type
, p
);
7306 /* Build a variable argument function type. The RETURN_TYPE is the
7307 type returned by the function. If additional arguments are provided,
7308 they are additional argument types. The list of argument types must
7309 always be terminated by NULL_TREE. */
7312 build_varargs_function_type_list (tree return_type
, ...)
7317 va_start (p
, return_type
);
7318 args
= build_function_type_list_1 (true, return_type
, p
);
7324 /* Build a METHOD_TYPE for a member of BASETYPE. The RETTYPE (a TYPE)
7325 and ARGTYPES (a TREE_LIST) are the return type and arguments types
7326 for the method. An implicit additional parameter (of type
7327 pointer-to-BASETYPE) is added to the ARGTYPES. */
7330 build_method_type_directly (tree basetype
,
7337 bool any_structural_p
, any_noncanonical_p
;
7338 tree canon_argtypes
;
7340 /* Make a node of the sort we want. */
7341 t
= make_node (METHOD_TYPE
);
7343 TYPE_METHOD_BASETYPE (t
) = TYPE_MAIN_VARIANT (basetype
);
7344 TREE_TYPE (t
) = rettype
;
7345 ptype
= build_pointer_type (basetype
);
7347 /* The actual arglist for this function includes a "hidden" argument
7348 which is "this". Put it into the list of argument types. */
7349 argtypes
= tree_cons (NULL_TREE
, ptype
, argtypes
);
7350 TYPE_ARG_TYPES (t
) = argtypes
;
7352 /* If we already have such a type, use the old one. */
7353 hashcode
= iterative_hash_object (TYPE_HASH (basetype
), hashcode
);
7354 hashcode
= iterative_hash_object (TYPE_HASH (rettype
), hashcode
);
7355 hashcode
= type_hash_list (argtypes
, hashcode
);
7356 t
= type_hash_canon (hashcode
, t
);
7358 /* Set up the canonical type. */
7360 = (TYPE_STRUCTURAL_EQUALITY_P (basetype
)
7361 || TYPE_STRUCTURAL_EQUALITY_P (rettype
));
7363 = (TYPE_CANONICAL (basetype
) != basetype
7364 || TYPE_CANONICAL (rettype
) != rettype
);
7365 canon_argtypes
= maybe_canonicalize_argtypes (TREE_CHAIN (argtypes
),
7367 &any_noncanonical_p
);
7368 if (any_structural_p
)
7369 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7370 else if (any_noncanonical_p
)
7372 = build_method_type_directly (TYPE_CANONICAL (basetype
),
7373 TYPE_CANONICAL (rettype
),
7375 if (!COMPLETE_TYPE_P (t
))
7381 /* Construct, lay out and return the type of methods belonging to class
7382 BASETYPE and whose arguments and values are described by TYPE.
7383 If that type exists already, reuse it.
7384 TYPE must be a FUNCTION_TYPE node. */
7387 build_method_type (tree basetype
, tree type
)
7389 gcc_assert (TREE_CODE (type
) == FUNCTION_TYPE
);
7391 return build_method_type_directly (basetype
,
7393 TYPE_ARG_TYPES (type
));
7396 /* Construct, lay out and return the type of offsets to a value
7397 of type TYPE, within an object of type BASETYPE.
7398 If a suitable offset type exists already, reuse it. */
7401 build_offset_type (tree basetype
, tree type
)
7404 hashval_t hashcode
= 0;
7406 /* Make a node of the sort we want. */
7407 t
= make_node (OFFSET_TYPE
);
7409 TYPE_OFFSET_BASETYPE (t
) = TYPE_MAIN_VARIANT (basetype
);
7410 TREE_TYPE (t
) = type
;
7412 /* If we already have such a type, use the old one. */
7413 hashcode
= iterative_hash_object (TYPE_HASH (basetype
), hashcode
);
7414 hashcode
= iterative_hash_object (TYPE_HASH (type
), hashcode
);
7415 t
= type_hash_canon (hashcode
, t
);
7417 if (!COMPLETE_TYPE_P (t
))
7420 if (TYPE_CANONICAL (t
) == t
)
7422 if (TYPE_STRUCTURAL_EQUALITY_P (basetype
)
7423 || TYPE_STRUCTURAL_EQUALITY_P (type
))
7424 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7425 else if (TYPE_CANONICAL (TYPE_MAIN_VARIANT (basetype
)) != basetype
7426 || TYPE_CANONICAL (type
) != type
)
7428 = build_offset_type (TYPE_CANONICAL (TYPE_MAIN_VARIANT (basetype
)),
7429 TYPE_CANONICAL (type
));
7435 /* Create a complex type whose components are COMPONENT_TYPE. */
7438 build_complex_type (tree component_type
)
7443 gcc_assert (INTEGRAL_TYPE_P (component_type
)
7444 || SCALAR_FLOAT_TYPE_P (component_type
)
7445 || FIXED_POINT_TYPE_P (component_type
));
7447 /* Make a node of the sort we want. */
7448 t
= make_node (COMPLEX_TYPE
);
7450 TREE_TYPE (t
) = TYPE_MAIN_VARIANT (component_type
);
7452 /* If we already have such a type, use the old one. */
7453 hashcode
= iterative_hash_object (TYPE_HASH (component_type
), 0);
7454 t
= type_hash_canon (hashcode
, t
);
7456 if (!COMPLETE_TYPE_P (t
))
7459 if (TYPE_CANONICAL (t
) == t
)
7461 if (TYPE_STRUCTURAL_EQUALITY_P (component_type
))
7462 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7463 else if (TYPE_CANONICAL (component_type
) != component_type
)
7465 = build_complex_type (TYPE_CANONICAL (component_type
));
7468 /* We need to create a name, since complex is a fundamental type. */
7469 if (! TYPE_NAME (t
))
7472 if (component_type
== char_type_node
)
7473 name
= "complex char";
7474 else if (component_type
== signed_char_type_node
)
7475 name
= "complex signed char";
7476 else if (component_type
== unsigned_char_type_node
)
7477 name
= "complex unsigned char";
7478 else if (component_type
== short_integer_type_node
)
7479 name
= "complex short int";
7480 else if (component_type
== short_unsigned_type_node
)
7481 name
= "complex short unsigned int";
7482 else if (component_type
== integer_type_node
)
7483 name
= "complex int";
7484 else if (component_type
== unsigned_type_node
)
7485 name
= "complex unsigned int";
7486 else if (component_type
== long_integer_type_node
)
7487 name
= "complex long int";
7488 else if (component_type
== long_unsigned_type_node
)
7489 name
= "complex long unsigned int";
7490 else if (component_type
== long_long_integer_type_node
)
7491 name
= "complex long long int";
7492 else if (component_type
== long_long_unsigned_type_node
)
7493 name
= "complex long long unsigned int";
7498 TYPE_NAME (t
) = build_decl (UNKNOWN_LOCATION
, TYPE_DECL
,
7499 get_identifier (name
), t
);
7502 return build_qualified_type (t
, TYPE_QUALS (component_type
));
7505 /* If TYPE is a real or complex floating-point type and the target
7506 does not directly support arithmetic on TYPE then return the wider
7507 type to be used for arithmetic on TYPE. Otherwise, return
7511 excess_precision_type (tree type
)
7513 if (flag_excess_precision
!= EXCESS_PRECISION_FAST
)
7515 int flt_eval_method
= TARGET_FLT_EVAL_METHOD
;
7516 switch (TREE_CODE (type
))
7519 switch (flt_eval_method
)
7522 if (TYPE_MODE (type
) == TYPE_MODE (float_type_node
))
7523 return double_type_node
;
7526 if (TYPE_MODE (type
) == TYPE_MODE (float_type_node
)
7527 || TYPE_MODE (type
) == TYPE_MODE (double_type_node
))
7528 return long_double_type_node
;
7535 if (TREE_CODE (TREE_TYPE (type
)) != REAL_TYPE
)
7537 switch (flt_eval_method
)
7540 if (TYPE_MODE (TREE_TYPE (type
)) == TYPE_MODE (float_type_node
))
7541 return complex_double_type_node
;
7544 if (TYPE_MODE (TREE_TYPE (type
)) == TYPE_MODE (float_type_node
)
7545 || (TYPE_MODE (TREE_TYPE (type
))
7546 == TYPE_MODE (double_type_node
)))
7547 return complex_long_double_type_node
;
7560 /* Return OP, stripped of any conversions to wider types as much as is safe.
7561 Converting the value back to OP's type makes a value equivalent to OP.
7563 If FOR_TYPE is nonzero, we return a value which, if converted to
7564 type FOR_TYPE, would be equivalent to converting OP to type FOR_TYPE.
7566 OP must have integer, real or enumeral type. Pointers are not allowed!
7568 There are some cases where the obvious value we could return
7569 would regenerate to OP if converted to OP's type,
7570 but would not extend like OP to wider types.
7571 If FOR_TYPE indicates such extension is contemplated, we eschew such values.
7572 For example, if OP is (unsigned short)(signed char)-1,
7573 we avoid returning (signed char)-1 if FOR_TYPE is int,
7574 even though extending that to an unsigned short would regenerate OP,
7575 since the result of extending (signed char)-1 to (int)
7576 is different from (int) OP. */
7579 get_unwidened (tree op
, tree for_type
)
7581 /* Set UNS initially if converting OP to FOR_TYPE is a zero-extension. */
7582 tree type
= TREE_TYPE (op
);
7584 = TYPE_PRECISION (for_type
!= 0 ? for_type
: type
);
7586 = (for_type
!= 0 && for_type
!= type
7587 && final_prec
> TYPE_PRECISION (type
)
7588 && TYPE_UNSIGNED (type
));
7591 while (CONVERT_EXPR_P (op
))
7595 /* TYPE_PRECISION on vector types has different meaning
7596 (TYPE_VECTOR_SUBPARTS) and casts from vectors are view conversions,
7597 so avoid them here. */
7598 if (TREE_CODE (TREE_TYPE (TREE_OPERAND (op
, 0))) == VECTOR_TYPE
)
7601 bitschange
= TYPE_PRECISION (TREE_TYPE (op
))
7602 - TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (op
, 0)));
7604 /* Truncations are many-one so cannot be removed.
7605 Unless we are later going to truncate down even farther. */
7607 && final_prec
> TYPE_PRECISION (TREE_TYPE (op
)))
7610 /* See what's inside this conversion. If we decide to strip it,
7612 op
= TREE_OPERAND (op
, 0);
7614 /* If we have not stripped any zero-extensions (uns is 0),
7615 we can strip any kind of extension.
7616 If we have previously stripped a zero-extension,
7617 only zero-extensions can safely be stripped.
7618 Any extension can be stripped if the bits it would produce
7619 are all going to be discarded later by truncating to FOR_TYPE. */
7623 if (! uns
|| final_prec
<= TYPE_PRECISION (TREE_TYPE (op
)))
7625 /* TYPE_UNSIGNED says whether this is a zero-extension.
7626 Let's avoid computing it if it does not affect WIN
7627 and if UNS will not be needed again. */
7629 || CONVERT_EXPR_P (op
))
7630 && TYPE_UNSIGNED (TREE_TYPE (op
)))
7638 /* If we finally reach a constant see if it fits in for_type and
7639 in that case convert it. */
7641 && TREE_CODE (win
) == INTEGER_CST
7642 && TREE_TYPE (win
) != for_type
7643 && int_fits_type_p (win
, for_type
))
7644 win
= fold_convert (for_type
, win
);
7649 /* Return OP or a simpler expression for a narrower value
7650 which can be sign-extended or zero-extended to give back OP.
7651 Store in *UNSIGNEDP_PTR either 1 if the value should be zero-extended
7652 or 0 if the value should be sign-extended. */
7655 get_narrower (tree op
, int *unsignedp_ptr
)
7660 bool integral_p
= INTEGRAL_TYPE_P (TREE_TYPE (op
));
7662 while (TREE_CODE (op
) == NOP_EXPR
)
7665 = (TYPE_PRECISION (TREE_TYPE (op
))
7666 - TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (op
, 0))));
7668 /* Truncations are many-one so cannot be removed. */
7672 /* See what's inside this conversion. If we decide to strip it,
7677 op
= TREE_OPERAND (op
, 0);
7678 /* An extension: the outermost one can be stripped,
7679 but remember whether it is zero or sign extension. */
7681 uns
= TYPE_UNSIGNED (TREE_TYPE (op
));
7682 /* Otherwise, if a sign extension has been stripped,
7683 only sign extensions can now be stripped;
7684 if a zero extension has been stripped, only zero-extensions. */
7685 else if (uns
!= TYPE_UNSIGNED (TREE_TYPE (op
)))
7689 else /* bitschange == 0 */
7691 /* A change in nominal type can always be stripped, but we must
7692 preserve the unsignedness. */
7694 uns
= TYPE_UNSIGNED (TREE_TYPE (op
));
7696 op
= TREE_OPERAND (op
, 0);
7697 /* Keep trying to narrow, but don't assign op to win if it
7698 would turn an integral type into something else. */
7699 if (INTEGRAL_TYPE_P (TREE_TYPE (op
)) != integral_p
)
7706 if (TREE_CODE (op
) == COMPONENT_REF
7707 /* Since type_for_size always gives an integer type. */
7708 && TREE_CODE (TREE_TYPE (op
)) != REAL_TYPE
7709 && TREE_CODE (TREE_TYPE (op
)) != FIXED_POINT_TYPE
7710 /* Ensure field is laid out already. */
7711 && DECL_SIZE (TREE_OPERAND (op
, 1)) != 0
7712 && host_integerp (DECL_SIZE (TREE_OPERAND (op
, 1)), 1))
7714 unsigned HOST_WIDE_INT innerprec
7715 = tree_low_cst (DECL_SIZE (TREE_OPERAND (op
, 1)), 1);
7716 int unsignedp
= (DECL_UNSIGNED (TREE_OPERAND (op
, 1))
7717 || TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (op
, 1))));
7718 tree type
= lang_hooks
.types
.type_for_size (innerprec
, unsignedp
);
7720 /* We can get this structure field in a narrower type that fits it,
7721 but the resulting extension to its nominal type (a fullword type)
7722 must satisfy the same conditions as for other extensions.
7724 Do this only for fields that are aligned (not bit-fields),
7725 because when bit-field insns will be used there is no
7726 advantage in doing this. */
7728 if (innerprec
< TYPE_PRECISION (TREE_TYPE (op
))
7729 && ! DECL_BIT_FIELD (TREE_OPERAND (op
, 1))
7730 && (first
|| uns
== DECL_UNSIGNED (TREE_OPERAND (op
, 1)))
7734 uns
= DECL_UNSIGNED (TREE_OPERAND (op
, 1));
7735 win
= fold_convert (type
, op
);
7739 *unsignedp_ptr
= uns
;
7743 /* Nonzero if integer constant C has a value that is permissible
7744 for type TYPE (an INTEGER_TYPE). */
7747 int_fits_type_p (const_tree c
, const_tree type
)
7749 tree type_low_bound
, type_high_bound
;
7750 bool ok_for_low_bound
, ok_for_high_bound
, unsc
;
7753 dc
= tree_to_double_int (c
);
7754 unsc
= TYPE_UNSIGNED (TREE_TYPE (c
));
7756 if (TREE_CODE (TREE_TYPE (c
)) == INTEGER_TYPE
7757 && TYPE_IS_SIZETYPE (TREE_TYPE (c
))
7759 /* So c is an unsigned integer whose type is sizetype and type is not.
7760 sizetype'd integers are sign extended even though they are
7761 unsigned. If the integer value fits in the lower end word of c,
7762 and if the higher end word has all its bits set to 1, that
7763 means the higher end bits are set to 1 only for sign extension.
7764 So let's convert c into an equivalent zero extended unsigned
7766 dc
= double_int_zext (dc
, TYPE_PRECISION (TREE_TYPE (c
)));
7769 type_low_bound
= TYPE_MIN_VALUE (type
);
7770 type_high_bound
= TYPE_MAX_VALUE (type
);
7772 /* If at least one bound of the type is a constant integer, we can check
7773 ourselves and maybe make a decision. If no such decision is possible, but
7774 this type is a subtype, try checking against that. Otherwise, use
7775 fit_double_type, which checks against the precision.
7777 Compute the status for each possibly constant bound, and return if we see
7778 one does not match. Use ok_for_xxx_bound for this purpose, assigning -1
7779 for "unknown if constant fits", 0 for "constant known *not* to fit" and 1
7780 for "constant known to fit". */
7782 /* Check if c >= type_low_bound. */
7783 if (type_low_bound
&& TREE_CODE (type_low_bound
) == INTEGER_CST
)
7785 dd
= tree_to_double_int (type_low_bound
);
7786 if (TREE_CODE (type
) == INTEGER_TYPE
7787 && TYPE_IS_SIZETYPE (type
)
7788 && TYPE_UNSIGNED (type
))
7789 dd
= double_int_zext (dd
, TYPE_PRECISION (type
));
7790 if (unsc
!= TYPE_UNSIGNED (TREE_TYPE (type_low_bound
)))
7792 int c_neg
= (!unsc
&& double_int_negative_p (dc
));
7793 int t_neg
= (unsc
&& double_int_negative_p (dd
));
7795 if (c_neg
&& !t_neg
)
7797 if ((c_neg
|| !t_neg
) && double_int_ucmp (dc
, dd
) < 0)
7800 else if (double_int_cmp (dc
, dd
, unsc
) < 0)
7802 ok_for_low_bound
= true;
7805 ok_for_low_bound
= false;
7807 /* Check if c <= type_high_bound. */
7808 if (type_high_bound
&& TREE_CODE (type_high_bound
) == INTEGER_CST
)
7810 dd
= tree_to_double_int (type_high_bound
);
7811 if (TREE_CODE (type
) == INTEGER_TYPE
7812 && TYPE_IS_SIZETYPE (type
)
7813 && TYPE_UNSIGNED (type
))
7814 dd
= double_int_zext (dd
, TYPE_PRECISION (type
));
7815 if (unsc
!= TYPE_UNSIGNED (TREE_TYPE (type_high_bound
)))
7817 int c_neg
= (!unsc
&& double_int_negative_p (dc
));
7818 int t_neg
= (unsc
&& double_int_negative_p (dd
));
7820 if (t_neg
&& !c_neg
)
7822 if ((t_neg
|| !c_neg
) && double_int_ucmp (dc
, dd
) > 0)
7825 else if (double_int_cmp (dc
, dd
, unsc
) > 0)
7827 ok_for_high_bound
= true;
7830 ok_for_high_bound
= false;
7832 /* If the constant fits both bounds, the result is known. */
7833 if (ok_for_low_bound
&& ok_for_high_bound
)
7836 /* Perform some generic filtering which may allow making a decision
7837 even if the bounds are not constant. First, negative integers
7838 never fit in unsigned types, */
7839 if (TYPE_UNSIGNED (type
) && !unsc
&& double_int_negative_p (dc
))
7842 /* Second, narrower types always fit in wider ones. */
7843 if (TYPE_PRECISION (type
) > TYPE_PRECISION (TREE_TYPE (c
)))
7846 /* Third, unsigned integers with top bit set never fit signed types. */
7847 if (! TYPE_UNSIGNED (type
) && unsc
)
7849 int prec
= GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (c
))) - 1;
7850 if (prec
< HOST_BITS_PER_WIDE_INT
)
7852 if (((((unsigned HOST_WIDE_INT
) 1) << prec
) & dc
.low
) != 0)
7855 else if (((((unsigned HOST_WIDE_INT
) 1)
7856 << (prec
- HOST_BITS_PER_WIDE_INT
)) & dc
.high
) != 0)
7860 /* If we haven't been able to decide at this point, there nothing more we
7861 can check ourselves here. Look at the base type if we have one and it
7862 has the same precision. */
7863 if (TREE_CODE (type
) == INTEGER_TYPE
7864 && TREE_TYPE (type
) != 0
7865 && TYPE_PRECISION (type
) == TYPE_PRECISION (TREE_TYPE (type
)))
7867 type
= TREE_TYPE (type
);
7871 /* Or to fit_double_type, if nothing else. */
7872 return !fit_double_type (dc
.low
, dc
.high
, &dc
.low
, &dc
.high
, type
);
7875 /* Stores bounds of an integer TYPE in MIN and MAX. If TYPE has non-constant
7876 bounds or is a POINTER_TYPE, the maximum and/or minimum values that can be
7877 represented (assuming two's-complement arithmetic) within the bit
7878 precision of the type are returned instead. */
7881 get_type_static_bounds (const_tree type
, mpz_t min
, mpz_t max
)
7883 if (!POINTER_TYPE_P (type
) && TYPE_MIN_VALUE (type
)
7884 && TREE_CODE (TYPE_MIN_VALUE (type
)) == INTEGER_CST
)
7885 mpz_set_double_int (min
, tree_to_double_int (TYPE_MIN_VALUE (type
)),
7886 TYPE_UNSIGNED (type
));
7889 if (TYPE_UNSIGNED (type
))
7890 mpz_set_ui (min
, 0);
7894 mn
= double_int_mask (TYPE_PRECISION (type
) - 1);
7895 mn
= double_int_sext (double_int_add (mn
, double_int_one
),
7896 TYPE_PRECISION (type
));
7897 mpz_set_double_int (min
, mn
, false);
7901 if (!POINTER_TYPE_P (type
) && TYPE_MAX_VALUE (type
)
7902 && TREE_CODE (TYPE_MAX_VALUE (type
)) == INTEGER_CST
)
7903 mpz_set_double_int (max
, tree_to_double_int (TYPE_MAX_VALUE (type
)),
7904 TYPE_UNSIGNED (type
));
7907 if (TYPE_UNSIGNED (type
))
7908 mpz_set_double_int (max
, double_int_mask (TYPE_PRECISION (type
)),
7911 mpz_set_double_int (max
, double_int_mask (TYPE_PRECISION (type
) - 1),
7916 /* Return true if VAR is an automatic variable defined in function FN. */
7919 auto_var_in_fn_p (const_tree var
, const_tree fn
)
7921 return (DECL_P (var
) && DECL_CONTEXT (var
) == fn
7922 && (((TREE_CODE (var
) == VAR_DECL
|| TREE_CODE (var
) == PARM_DECL
)
7923 && ! TREE_STATIC (var
))
7924 || TREE_CODE (var
) == LABEL_DECL
7925 || TREE_CODE (var
) == RESULT_DECL
));
7928 /* Subprogram of following function. Called by walk_tree.
7930 Return *TP if it is an automatic variable or parameter of the
7931 function passed in as DATA. */
7934 find_var_from_fn (tree
*tp
, int *walk_subtrees
, void *data
)
7936 tree fn
= (tree
) data
;
7941 else if (DECL_P (*tp
)
7942 && auto_var_in_fn_p (*tp
, fn
))
7948 /* Returns true if T is, contains, or refers to a type with variable
7949 size. For METHOD_TYPEs and FUNCTION_TYPEs we exclude the
7950 arguments, but not the return type. If FN is nonzero, only return
7951 true if a modifier of the type or position of FN is a variable or
7952 parameter inside FN.
7954 This concept is more general than that of C99 'variably modified types':
7955 in C99, a struct type is never variably modified because a VLA may not
7956 appear as a structure member. However, in GNU C code like:
7958 struct S { int i[f()]; };
7960 is valid, and other languages may define similar constructs. */
7963 variably_modified_type_p (tree type
, tree fn
)
7967 /* Test if T is either variable (if FN is zero) or an expression containing
7968 a variable in FN. */
7969 #define RETURN_TRUE_IF_VAR(T) \
7970 do { tree _t = (T); \
7971 if (_t && _t != error_mark_node && TREE_CODE (_t) != INTEGER_CST \
7972 && (!fn || walk_tree (&_t, find_var_from_fn, fn, NULL))) \
7973 return true; } while (0)
7975 if (type
== error_mark_node
)
7978 /* If TYPE itself has variable size, it is variably modified. */
7979 RETURN_TRUE_IF_VAR (TYPE_SIZE (type
));
7980 RETURN_TRUE_IF_VAR (TYPE_SIZE_UNIT (type
));
7982 switch (TREE_CODE (type
))
7985 case REFERENCE_TYPE
:
7987 if (variably_modified_type_p (TREE_TYPE (type
), fn
))
7993 /* If TYPE is a function type, it is variably modified if the
7994 return type is variably modified. */
7995 if (variably_modified_type_p (TREE_TYPE (type
), fn
))
8001 case FIXED_POINT_TYPE
:
8004 /* Scalar types are variably modified if their end points
8006 RETURN_TRUE_IF_VAR (TYPE_MIN_VALUE (type
));
8007 RETURN_TRUE_IF_VAR (TYPE_MAX_VALUE (type
));
8012 case QUAL_UNION_TYPE
:
8013 /* We can't see if any of the fields are variably-modified by the
8014 definition we normally use, since that would produce infinite
8015 recursion via pointers. */
8016 /* This is variably modified if some field's type is. */
8017 for (t
= TYPE_FIELDS (type
); t
; t
= TREE_CHAIN (t
))
8018 if (TREE_CODE (t
) == FIELD_DECL
)
8020 RETURN_TRUE_IF_VAR (DECL_FIELD_OFFSET (t
));
8021 RETURN_TRUE_IF_VAR (DECL_SIZE (t
));
8022 RETURN_TRUE_IF_VAR (DECL_SIZE_UNIT (t
));
8024 if (TREE_CODE (type
) == QUAL_UNION_TYPE
)
8025 RETURN_TRUE_IF_VAR (DECL_QUALIFIER (t
));
8030 /* Do not call ourselves to avoid infinite recursion. This is
8031 variably modified if the element type is. */
8032 RETURN_TRUE_IF_VAR (TYPE_SIZE (TREE_TYPE (type
)));
8033 RETURN_TRUE_IF_VAR (TYPE_SIZE_UNIT (TREE_TYPE (type
)));
8040 /* The current language may have other cases to check, but in general,
8041 all other types are not variably modified. */
8042 return lang_hooks
.tree_inlining
.var_mod_type_p (type
, fn
);
8044 #undef RETURN_TRUE_IF_VAR
8047 /* Given a DECL or TYPE, return the scope in which it was declared, or
8048 NULL_TREE if there is no containing scope. */
8051 get_containing_scope (const_tree t
)
8053 return (TYPE_P (t
) ? TYPE_CONTEXT (t
) : DECL_CONTEXT (t
));
8056 /* Return the innermost context enclosing DECL that is
8057 a FUNCTION_DECL, or zero if none. */
8060 decl_function_context (const_tree decl
)
8064 if (TREE_CODE (decl
) == ERROR_MARK
)
8067 /* C++ virtual functions use DECL_CONTEXT for the class of the vtable
8068 where we look up the function at runtime. Such functions always take
8069 a first argument of type 'pointer to real context'.
8071 C++ should really be fixed to use DECL_CONTEXT for the real context,
8072 and use something else for the "virtual context". */
8073 else if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_VINDEX (decl
))
8076 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl
)))));
8078 context
= DECL_CONTEXT (decl
);
8080 while (context
&& TREE_CODE (context
) != FUNCTION_DECL
)
8082 if (TREE_CODE (context
) == BLOCK
)
8083 context
= BLOCK_SUPERCONTEXT (context
);
8085 context
= get_containing_scope (context
);
8091 /* Return the innermost context enclosing DECL that is
8092 a RECORD_TYPE, UNION_TYPE or QUAL_UNION_TYPE, or zero if none.
8093 TYPE_DECLs and FUNCTION_DECLs are transparent to this function. */
8096 decl_type_context (const_tree decl
)
8098 tree context
= DECL_CONTEXT (decl
);
8101 switch (TREE_CODE (context
))
8103 case NAMESPACE_DECL
:
8104 case TRANSLATION_UNIT_DECL
:
8109 case QUAL_UNION_TYPE
:
8114 context
= DECL_CONTEXT (context
);
8118 context
= BLOCK_SUPERCONTEXT (context
);
8128 /* CALL is a CALL_EXPR. Return the declaration for the function
8129 called, or NULL_TREE if the called function cannot be
8133 get_callee_fndecl (const_tree call
)
8137 if (call
== error_mark_node
)
8138 return error_mark_node
;
8140 /* It's invalid to call this function with anything but a
8142 gcc_assert (TREE_CODE (call
) == CALL_EXPR
);
8144 /* The first operand to the CALL is the address of the function
8146 addr
= CALL_EXPR_FN (call
);
8150 /* If this is a readonly function pointer, extract its initial value. */
8151 if (DECL_P (addr
) && TREE_CODE (addr
) != FUNCTION_DECL
8152 && TREE_READONLY (addr
) && ! TREE_THIS_VOLATILE (addr
)
8153 && DECL_INITIAL (addr
))
8154 addr
= DECL_INITIAL (addr
);
8156 /* If the address is just `&f' for some function `f', then we know
8157 that `f' is being called. */
8158 if (TREE_CODE (addr
) == ADDR_EXPR
8159 && TREE_CODE (TREE_OPERAND (addr
, 0)) == FUNCTION_DECL
)
8160 return TREE_OPERAND (addr
, 0);
8162 /* We couldn't figure out what was being called. */
8166 /* Print debugging information about tree nodes generated during the compile,
8167 and any language-specific information. */
8170 dump_tree_statistics (void)
8172 #ifdef GATHER_STATISTICS
8174 int total_nodes
, total_bytes
;
8177 fprintf (stderr
, "\n??? tree nodes created\n\n");
8178 #ifdef GATHER_STATISTICS
8179 fprintf (stderr
, "Kind Nodes Bytes\n");
8180 fprintf (stderr
, "---------------------------------------\n");
8181 total_nodes
= total_bytes
= 0;
8182 for (i
= 0; i
< (int) all_kinds
; i
++)
8184 fprintf (stderr
, "%-20s %7d %10d\n", tree_node_kind_names
[i
],
8185 tree_node_counts
[i
], tree_node_sizes
[i
]);
8186 total_nodes
+= tree_node_counts
[i
];
8187 total_bytes
+= tree_node_sizes
[i
];
8189 fprintf (stderr
, "---------------------------------------\n");
8190 fprintf (stderr
, "%-20s %7d %10d\n", "Total", total_nodes
, total_bytes
);
8191 fprintf (stderr
, "---------------------------------------\n");
8192 ssanames_print_statistics ();
8193 phinodes_print_statistics ();
8195 fprintf (stderr
, "(No per-node statistics)\n");
8197 print_type_hash_statistics ();
8198 print_debug_expr_statistics ();
8199 print_value_expr_statistics ();
8200 lang_hooks
.print_statistics ();
8203 #define FILE_FUNCTION_FORMAT "_GLOBAL__%s_%s"
8205 /* Generate a crc32 of a string. */
8208 crc32_string (unsigned chksum
, const char *string
)
8212 unsigned value
= *string
<< 24;
8215 for (ix
= 8; ix
--; value
<<= 1)
8219 feedback
= (value
^ chksum
) & 0x80000000 ? 0x04c11db7 : 0;
8228 /* P is a string that will be used in a symbol. Mask out any characters
8229 that are not valid in that context. */
8232 clean_symbol_name (char *p
)
8236 #ifndef NO_DOLLAR_IN_LABEL /* this for `$'; unlikely, but... -- kr */
8239 #ifndef NO_DOT_IN_LABEL /* this for `.'; unlikely, but... */
8246 /* Generate a name for a special-purpose function function.
8247 The generated name may need to be unique across the whole link.
8248 TYPE is some string to identify the purpose of this function to the
8249 linker or collect2; it must start with an uppercase letter,
8251 I - for constructors
8253 N - for C++ anonymous namespaces
8254 F - for DWARF unwind frame information. */
8257 get_file_function_name (const char *type
)
8263 /* If we already have a name we know to be unique, just use that. */
8264 if (first_global_object_name
)
8265 p
= q
= ASTRDUP (first_global_object_name
);
8266 /* If the target is handling the constructors/destructors, they
8267 will be local to this file and the name is only necessary for
8268 debugging purposes. */
8269 else if ((type
[0] == 'I' || type
[0] == 'D') && targetm
.have_ctors_dtors
)
8271 const char *file
= main_input_filename
;
8273 file
= input_filename
;
8274 /* Just use the file's basename, because the full pathname
8275 might be quite long. */
8276 p
= strrchr (file
, '/');
8281 p
= q
= ASTRDUP (p
);
8285 /* Otherwise, the name must be unique across the entire link.
8286 We don't have anything that we know to be unique to this translation
8287 unit, so use what we do have and throw in some randomness. */
8289 const char *name
= weak_global_object_name
;
8290 const char *file
= main_input_filename
;
8295 file
= input_filename
;
8297 len
= strlen (file
);
8298 q
= (char *) alloca (9 * 2 + len
+ 1);
8299 memcpy (q
, file
, len
+ 1);
8301 sprintf (q
+ len
, "_%08X_%08X", crc32_string (0, name
),
8302 crc32_string (0, get_random_seed (false)));
8307 clean_symbol_name (q
);
8308 buf
= (char *) alloca (sizeof (FILE_FUNCTION_FORMAT
) + strlen (p
)
8311 /* Set up the name of the file-level functions we may need.
8312 Use a global object (which is already required to be unique over
8313 the program) rather than the file name (which imposes extra
8315 sprintf (buf
, FILE_FUNCTION_FORMAT
, type
, p
);
8317 return get_identifier (buf
);
8320 #if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007)
8322 /* Complain that the tree code of NODE does not match the expected 0
8323 terminated list of trailing codes. The trailing code list can be
8324 empty, for a more vague error message. FILE, LINE, and FUNCTION
8325 are of the caller. */
8328 tree_check_failed (const_tree node
, const char *file
,
8329 int line
, const char *function
, ...)
8333 unsigned length
= 0;
8336 va_start (args
, function
);
8337 while ((code
= va_arg (args
, int)))
8338 length
+= 4 + strlen (tree_code_name
[code
]);
8343 va_start (args
, function
);
8344 length
+= strlen ("expected ");
8345 buffer
= tmp
= (char *) alloca (length
);
8347 while ((code
= va_arg (args
, int)))
8349 const char *prefix
= length
? " or " : "expected ";
8351 strcpy (tmp
+ length
, prefix
);
8352 length
+= strlen (prefix
);
8353 strcpy (tmp
+ length
, tree_code_name
[code
]);
8354 length
+= strlen (tree_code_name
[code
]);
8359 buffer
= "unexpected node";
8361 internal_error ("tree check: %s, have %s in %s, at %s:%d",
8362 buffer
, tree_code_name
[TREE_CODE (node
)],
8363 function
, trim_filename (file
), line
);
8366 /* Complain that the tree code of NODE does match the expected 0
8367 terminated list of trailing codes. FILE, LINE, and FUNCTION are of
8371 tree_not_check_failed (const_tree node
, const char *file
,
8372 int line
, const char *function
, ...)
8376 unsigned length
= 0;
8379 va_start (args
, function
);
8380 while ((code
= va_arg (args
, int)))
8381 length
+= 4 + strlen (tree_code_name
[code
]);
8383 va_start (args
, function
);
8384 buffer
= (char *) alloca (length
);
8386 while ((code
= va_arg (args
, int)))
8390 strcpy (buffer
+ length
, " or ");
8393 strcpy (buffer
+ length
, tree_code_name
[code
]);
8394 length
+= strlen (tree_code_name
[code
]);
8398 internal_error ("tree check: expected none of %s, have %s in %s, at %s:%d",
8399 buffer
, tree_code_name
[TREE_CODE (node
)],
8400 function
, trim_filename (file
), line
);
8403 /* Similar to tree_check_failed, except that we check for a class of tree
8404 code, given in CL. */
8407 tree_class_check_failed (const_tree node
, const enum tree_code_class cl
,
8408 const char *file
, int line
, const char *function
)
8411 ("tree check: expected class %qs, have %qs (%s) in %s, at %s:%d",
8412 TREE_CODE_CLASS_STRING (cl
),
8413 TREE_CODE_CLASS_STRING (TREE_CODE_CLASS (TREE_CODE (node
))),
8414 tree_code_name
[TREE_CODE (node
)], function
, trim_filename (file
), line
);
8417 /* Similar to tree_check_failed, except that instead of specifying a
8418 dozen codes, use the knowledge that they're all sequential. */
8421 tree_range_check_failed (const_tree node
, const char *file
, int line
,
8422 const char *function
, enum tree_code c1
,
8426 unsigned length
= 0;
8429 for (c
= c1
; c
<= c2
; ++c
)
8430 length
+= 4 + strlen (tree_code_name
[c
]);
8432 length
+= strlen ("expected ");
8433 buffer
= (char *) alloca (length
);
8436 for (c
= c1
; c
<= c2
; ++c
)
8438 const char *prefix
= length
? " or " : "expected ";
8440 strcpy (buffer
+ length
, prefix
);
8441 length
+= strlen (prefix
);
8442 strcpy (buffer
+ length
, tree_code_name
[c
]);
8443 length
+= strlen (tree_code_name
[c
]);
8446 internal_error ("tree check: %s, have %s in %s, at %s:%d",
8447 buffer
, tree_code_name
[TREE_CODE (node
)],
8448 function
, trim_filename (file
), line
);
8452 /* Similar to tree_check_failed, except that we check that a tree does
8453 not have the specified code, given in CL. */
8456 tree_not_class_check_failed (const_tree node
, const enum tree_code_class cl
,
8457 const char *file
, int line
, const char *function
)
8460 ("tree check: did not expect class %qs, have %qs (%s) in %s, at %s:%d",
8461 TREE_CODE_CLASS_STRING (cl
),
8462 TREE_CODE_CLASS_STRING (TREE_CODE_CLASS (TREE_CODE (node
))),
8463 tree_code_name
[TREE_CODE (node
)], function
, trim_filename (file
), line
);
8467 /* Similar to tree_check_failed but applied to OMP_CLAUSE codes. */
8470 omp_clause_check_failed (const_tree node
, const char *file
, int line
,
8471 const char *function
, enum omp_clause_code code
)
8473 internal_error ("tree check: expected omp_clause %s, have %s in %s, at %s:%d",
8474 omp_clause_code_name
[code
], tree_code_name
[TREE_CODE (node
)],
8475 function
, trim_filename (file
), line
);
8479 /* Similar to tree_range_check_failed but applied to OMP_CLAUSE codes. */
8482 omp_clause_range_check_failed (const_tree node
, const char *file
, int line
,
8483 const char *function
, enum omp_clause_code c1
,
8484 enum omp_clause_code c2
)
8487 unsigned length
= 0;
8490 for (c
= c1
; c
<= c2
; ++c
)
8491 length
+= 4 + strlen (omp_clause_code_name
[c
]);
8493 length
+= strlen ("expected ");
8494 buffer
= (char *) alloca (length
);
8497 for (c
= c1
; c
<= c2
; ++c
)
8499 const char *prefix
= length
? " or " : "expected ";
8501 strcpy (buffer
+ length
, prefix
);
8502 length
+= strlen (prefix
);
8503 strcpy (buffer
+ length
, omp_clause_code_name
[c
]);
8504 length
+= strlen (omp_clause_code_name
[c
]);
8507 internal_error ("tree check: %s, have %s in %s, at %s:%d",
8508 buffer
, omp_clause_code_name
[TREE_CODE (node
)],
8509 function
, trim_filename (file
), line
);
8513 #undef DEFTREESTRUCT
8514 #define DEFTREESTRUCT(VAL, NAME) NAME,
8516 static const char *ts_enum_names
[] = {
8517 #include "treestruct.def"
8519 #undef DEFTREESTRUCT
8521 #define TS_ENUM_NAME(EN) (ts_enum_names[(EN)])
8523 /* Similar to tree_class_check_failed, except that we check for
8524 whether CODE contains the tree structure identified by EN. */
8527 tree_contains_struct_check_failed (const_tree node
,
8528 const enum tree_node_structure_enum en
,
8529 const char *file
, int line
,
8530 const char *function
)
8533 ("tree check: expected tree that contains %qs structure, have %qs in %s, at %s:%d",
8535 tree_code_name
[TREE_CODE (node
)], function
, trim_filename (file
), line
);
8539 /* Similar to above, except that the check is for the bounds of a TREE_VEC's
8540 (dynamically sized) vector. */
8543 tree_vec_elt_check_failed (int idx
, int len
, const char *file
, int line
,
8544 const char *function
)
8547 ("tree check: accessed elt %d of tree_vec with %d elts in %s, at %s:%d",
8548 idx
+ 1, len
, function
, trim_filename (file
), line
);
8551 /* Similar to above, except that the check is for the bounds of the operand
8552 vector of an expression node EXP. */
8555 tree_operand_check_failed (int idx
, const_tree exp
, const char *file
,
8556 int line
, const char *function
)
8558 int code
= TREE_CODE (exp
);
8560 ("tree check: accessed operand %d of %s with %d operands in %s, at %s:%d",
8561 idx
+ 1, tree_code_name
[code
], TREE_OPERAND_LENGTH (exp
),
8562 function
, trim_filename (file
), line
);
8565 /* Similar to above, except that the check is for the number of
8566 operands of an OMP_CLAUSE node. */
8569 omp_clause_operand_check_failed (int idx
, const_tree t
, const char *file
,
8570 int line
, const char *function
)
8573 ("tree check: accessed operand %d of omp_clause %s with %d operands "
8574 "in %s, at %s:%d", idx
+ 1, omp_clause_code_name
[OMP_CLAUSE_CODE (t
)],
8575 omp_clause_num_ops
[OMP_CLAUSE_CODE (t
)], function
,
8576 trim_filename (file
), line
);
8578 #endif /* ENABLE_TREE_CHECKING */
8580 /* Create a new vector type node holding SUBPARTS units of type INNERTYPE,
8581 and mapped to the machine mode MODE. Initialize its fields and build
8582 the information necessary for debugging output. */
8585 make_vector_type (tree innertype
, int nunits
, enum machine_mode mode
)
8588 hashval_t hashcode
= 0;
8590 t
= make_node (VECTOR_TYPE
);
8591 TREE_TYPE (t
) = TYPE_MAIN_VARIANT (innertype
);
8592 SET_TYPE_VECTOR_SUBPARTS (t
, nunits
);
8593 SET_TYPE_MODE (t
, mode
);
8595 if (TYPE_STRUCTURAL_EQUALITY_P (innertype
))
8596 SET_TYPE_STRUCTURAL_EQUALITY (t
);
8597 else if (TYPE_CANONICAL (innertype
) != innertype
8598 || mode
!= VOIDmode
)
8600 = make_vector_type (TYPE_CANONICAL (innertype
), nunits
, VOIDmode
);
8605 tree index
= build_int_cst (NULL_TREE
, nunits
- 1);
8606 tree array
= build_array_type (TYPE_MAIN_VARIANT (innertype
),
8607 build_index_type (index
));
8608 tree rt
= make_node (RECORD_TYPE
);
8610 TYPE_FIELDS (rt
) = build_decl (UNKNOWN_LOCATION
, FIELD_DECL
,
8611 get_identifier ("f"), array
);
8612 DECL_CONTEXT (TYPE_FIELDS (rt
)) = rt
;
8614 TYPE_DEBUG_REPRESENTATION_TYPE (t
) = rt
;
8615 /* In dwarfout.c, type lookup uses TYPE_UID numbers. We want to output
8616 the representation type, and we want to find that die when looking up
8617 the vector type. This is most easily achieved by making the TYPE_UID
8619 TYPE_UID (rt
) = TYPE_UID (t
);
8622 hashcode
= iterative_hash_host_wide_int (VECTOR_TYPE
, hashcode
);
8623 hashcode
= iterative_hash_host_wide_int (nunits
, hashcode
);
8624 hashcode
= iterative_hash_host_wide_int (mode
, hashcode
);
8625 hashcode
= iterative_hash_object (TYPE_HASH (TREE_TYPE (t
)), hashcode
);
8626 t
= type_hash_canon (hashcode
, t
);
8628 /* We have built a main variant, based on the main variant of the
8629 inner type. Use it to build the variant we return. */
8630 if ((TYPE_ATTRIBUTES (innertype
) || TYPE_QUALS (innertype
))
8631 && TREE_TYPE (t
) != innertype
)
8632 return build_type_attribute_qual_variant (t
,
8633 TYPE_ATTRIBUTES (innertype
),
8634 TYPE_QUALS (innertype
));
8640 make_or_reuse_type (unsigned size
, int unsignedp
)
8642 if (size
== INT_TYPE_SIZE
)
8643 return unsignedp
? unsigned_type_node
: integer_type_node
;
8644 if (size
== CHAR_TYPE_SIZE
)
8645 return unsignedp
? unsigned_char_type_node
: signed_char_type_node
;
8646 if (size
== SHORT_TYPE_SIZE
)
8647 return unsignedp
? short_unsigned_type_node
: short_integer_type_node
;
8648 if (size
== LONG_TYPE_SIZE
)
8649 return unsignedp
? long_unsigned_type_node
: long_integer_type_node
;
8650 if (size
== LONG_LONG_TYPE_SIZE
)
8651 return (unsignedp
? long_long_unsigned_type_node
8652 : long_long_integer_type_node
);
8655 return make_unsigned_type (size
);
8657 return make_signed_type (size
);
8660 /* Create or reuse a fract type by SIZE, UNSIGNEDP, and SATP. */
8663 make_or_reuse_fract_type (unsigned size
, int unsignedp
, int satp
)
8667 if (size
== SHORT_FRACT_TYPE_SIZE
)
8668 return unsignedp
? sat_unsigned_short_fract_type_node
8669 : sat_short_fract_type_node
;
8670 if (size
== FRACT_TYPE_SIZE
)
8671 return unsignedp
? sat_unsigned_fract_type_node
: sat_fract_type_node
;
8672 if (size
== LONG_FRACT_TYPE_SIZE
)
8673 return unsignedp
? sat_unsigned_long_fract_type_node
8674 : sat_long_fract_type_node
;
8675 if (size
== LONG_LONG_FRACT_TYPE_SIZE
)
8676 return unsignedp
? sat_unsigned_long_long_fract_type_node
8677 : sat_long_long_fract_type_node
;
8681 if (size
== SHORT_FRACT_TYPE_SIZE
)
8682 return unsignedp
? unsigned_short_fract_type_node
8683 : short_fract_type_node
;
8684 if (size
== FRACT_TYPE_SIZE
)
8685 return unsignedp
? unsigned_fract_type_node
: fract_type_node
;
8686 if (size
== LONG_FRACT_TYPE_SIZE
)
8687 return unsignedp
? unsigned_long_fract_type_node
8688 : long_fract_type_node
;
8689 if (size
== LONG_LONG_FRACT_TYPE_SIZE
)
8690 return unsignedp
? unsigned_long_long_fract_type_node
8691 : long_long_fract_type_node
;
8694 return make_fract_type (size
, unsignedp
, satp
);
8697 /* Create or reuse an accum type by SIZE, UNSIGNEDP, and SATP. */
8700 make_or_reuse_accum_type (unsigned size
, int unsignedp
, int satp
)
8704 if (size
== SHORT_ACCUM_TYPE_SIZE
)
8705 return unsignedp
? sat_unsigned_short_accum_type_node
8706 : sat_short_accum_type_node
;
8707 if (size
== ACCUM_TYPE_SIZE
)
8708 return unsignedp
? sat_unsigned_accum_type_node
: sat_accum_type_node
;
8709 if (size
== LONG_ACCUM_TYPE_SIZE
)
8710 return unsignedp
? sat_unsigned_long_accum_type_node
8711 : sat_long_accum_type_node
;
8712 if (size
== LONG_LONG_ACCUM_TYPE_SIZE
)
8713 return unsignedp
? sat_unsigned_long_long_accum_type_node
8714 : sat_long_long_accum_type_node
;
8718 if (size
== SHORT_ACCUM_TYPE_SIZE
)
8719 return unsignedp
? unsigned_short_accum_type_node
8720 : short_accum_type_node
;
8721 if (size
== ACCUM_TYPE_SIZE
)
8722 return unsignedp
? unsigned_accum_type_node
: accum_type_node
;
8723 if (size
== LONG_ACCUM_TYPE_SIZE
)
8724 return unsignedp
? unsigned_long_accum_type_node
8725 : long_accum_type_node
;
8726 if (size
== LONG_LONG_ACCUM_TYPE_SIZE
)
8727 return unsignedp
? unsigned_long_long_accum_type_node
8728 : long_long_accum_type_node
;
8731 return make_accum_type (size
, unsignedp
, satp
);
8734 /* Create nodes for all integer types (and error_mark_node) using the sizes
8735 of C datatypes. The caller should call set_sizetype soon after calling
8736 this function to select one of the types as sizetype. */
8739 build_common_tree_nodes (bool signed_char
, bool signed_sizetype
)
8741 error_mark_node
= make_node (ERROR_MARK
);
8742 TREE_TYPE (error_mark_node
) = error_mark_node
;
8744 initialize_sizetypes (signed_sizetype
);
8746 /* Define both `signed char' and `unsigned char'. */
8747 signed_char_type_node
= make_signed_type (CHAR_TYPE_SIZE
);
8748 TYPE_STRING_FLAG (signed_char_type_node
) = 1;
8749 unsigned_char_type_node
= make_unsigned_type (CHAR_TYPE_SIZE
);
8750 TYPE_STRING_FLAG (unsigned_char_type_node
) = 1;
8752 /* Define `char', which is like either `signed char' or `unsigned char'
8753 but not the same as either. */
8756 ? make_signed_type (CHAR_TYPE_SIZE
)
8757 : make_unsigned_type (CHAR_TYPE_SIZE
));
8758 TYPE_STRING_FLAG (char_type_node
) = 1;
8760 short_integer_type_node
= make_signed_type (SHORT_TYPE_SIZE
);
8761 short_unsigned_type_node
= make_unsigned_type (SHORT_TYPE_SIZE
);
8762 integer_type_node
= make_signed_type (INT_TYPE_SIZE
);
8763 unsigned_type_node
= make_unsigned_type (INT_TYPE_SIZE
);
8764 long_integer_type_node
= make_signed_type (LONG_TYPE_SIZE
);
8765 long_unsigned_type_node
= make_unsigned_type (LONG_TYPE_SIZE
);
8766 long_long_integer_type_node
= make_signed_type (LONG_LONG_TYPE_SIZE
);
8767 long_long_unsigned_type_node
= make_unsigned_type (LONG_LONG_TYPE_SIZE
);
8769 /* Define a boolean type. This type only represents boolean values but
8770 may be larger than char depending on the value of BOOL_TYPE_SIZE.
8771 Front ends which want to override this size (i.e. Java) can redefine
8772 boolean_type_node before calling build_common_tree_nodes_2. */
8773 boolean_type_node
= make_unsigned_type (BOOL_TYPE_SIZE
);
8774 TREE_SET_CODE (boolean_type_node
, BOOLEAN_TYPE
);
8775 TYPE_MAX_VALUE (boolean_type_node
) = build_int_cst (boolean_type_node
, 1);
8776 TYPE_PRECISION (boolean_type_node
) = 1;
8778 /* Fill in the rest of the sized types. Reuse existing type nodes
8780 intQI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (QImode
), 0);
8781 intHI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (HImode
), 0);
8782 intSI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (SImode
), 0);
8783 intDI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (DImode
), 0);
8784 intTI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (TImode
), 0);
8786 unsigned_intQI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (QImode
), 1);
8787 unsigned_intHI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (HImode
), 1);
8788 unsigned_intSI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (SImode
), 1);
8789 unsigned_intDI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (DImode
), 1);
8790 unsigned_intTI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (TImode
), 1);
8792 access_public_node
= get_identifier ("public");
8793 access_protected_node
= get_identifier ("protected");
8794 access_private_node
= get_identifier ("private");
8797 /* Call this function after calling build_common_tree_nodes and set_sizetype.
8798 It will create several other common tree nodes. */
8801 build_common_tree_nodes_2 (int short_double
)
8803 /* Define these next since types below may used them. */
8804 integer_zero_node
= build_int_cst (NULL_TREE
, 0);
8805 integer_one_node
= build_int_cst (NULL_TREE
, 1);
8806 integer_minus_one_node
= build_int_cst (NULL_TREE
, -1);
8808 size_zero_node
= size_int (0);
8809 size_one_node
= size_int (1);
8810 bitsize_zero_node
= bitsize_int (0);
8811 bitsize_one_node
= bitsize_int (1);
8812 bitsize_unit_node
= bitsize_int (BITS_PER_UNIT
);
8814 boolean_false_node
= TYPE_MIN_VALUE (boolean_type_node
);
8815 boolean_true_node
= TYPE_MAX_VALUE (boolean_type_node
);
8817 void_type_node
= make_node (VOID_TYPE
);
8818 layout_type (void_type_node
);
8820 /* We are not going to have real types in C with less than byte alignment,
8821 so we might as well not have any types that claim to have it. */
8822 TYPE_ALIGN (void_type_node
) = BITS_PER_UNIT
;
8823 TYPE_USER_ALIGN (void_type_node
) = 0;
8825 null_pointer_node
= build_int_cst (build_pointer_type (void_type_node
), 0);
8826 layout_type (TREE_TYPE (null_pointer_node
));
8828 ptr_type_node
= build_pointer_type (void_type_node
);
8830 = build_pointer_type (build_type_variant (void_type_node
, 1, 0));
8831 fileptr_type_node
= ptr_type_node
;
8833 float_type_node
= make_node (REAL_TYPE
);
8834 TYPE_PRECISION (float_type_node
) = FLOAT_TYPE_SIZE
;
8835 layout_type (float_type_node
);
8837 double_type_node
= make_node (REAL_TYPE
);
8839 TYPE_PRECISION (double_type_node
) = FLOAT_TYPE_SIZE
;
8841 TYPE_PRECISION (double_type_node
) = DOUBLE_TYPE_SIZE
;
8842 layout_type (double_type_node
);
8844 long_double_type_node
= make_node (REAL_TYPE
);
8845 TYPE_PRECISION (long_double_type_node
) = LONG_DOUBLE_TYPE_SIZE
;
8846 layout_type (long_double_type_node
);
8848 float_ptr_type_node
= build_pointer_type (float_type_node
);
8849 double_ptr_type_node
= build_pointer_type (double_type_node
);
8850 long_double_ptr_type_node
= build_pointer_type (long_double_type_node
);
8851 integer_ptr_type_node
= build_pointer_type (integer_type_node
);
8853 /* Fixed size integer types. */
8854 uint32_type_node
= build_nonstandard_integer_type (32, true);
8855 uint64_type_node
= build_nonstandard_integer_type (64, true);
8857 /* Decimal float types. */
8858 dfloat32_type_node
= make_node (REAL_TYPE
);
8859 TYPE_PRECISION (dfloat32_type_node
) = DECIMAL32_TYPE_SIZE
;
8860 layout_type (dfloat32_type_node
);
8861 SET_TYPE_MODE (dfloat32_type_node
, SDmode
);
8862 dfloat32_ptr_type_node
= build_pointer_type (dfloat32_type_node
);
8864 dfloat64_type_node
= make_node (REAL_TYPE
);
8865 TYPE_PRECISION (dfloat64_type_node
) = DECIMAL64_TYPE_SIZE
;
8866 layout_type (dfloat64_type_node
);
8867 SET_TYPE_MODE (dfloat64_type_node
, DDmode
);
8868 dfloat64_ptr_type_node
= build_pointer_type (dfloat64_type_node
);
8870 dfloat128_type_node
= make_node (REAL_TYPE
);
8871 TYPE_PRECISION (dfloat128_type_node
) = DECIMAL128_TYPE_SIZE
;
8872 layout_type (dfloat128_type_node
);
8873 SET_TYPE_MODE (dfloat128_type_node
, TDmode
);
8874 dfloat128_ptr_type_node
= build_pointer_type (dfloat128_type_node
);
8876 complex_integer_type_node
= build_complex_type (integer_type_node
);
8877 complex_float_type_node
= build_complex_type (float_type_node
);
8878 complex_double_type_node
= build_complex_type (double_type_node
);
8879 complex_long_double_type_node
= build_complex_type (long_double_type_node
);
8881 /* Make fixed-point nodes based on sat/non-sat and signed/unsigned. */
8882 #define MAKE_FIXED_TYPE_NODE(KIND,SIZE) \
8883 sat_ ## KIND ## _type_node = \
8884 make_sat_signed_ ## KIND ## _type (SIZE); \
8885 sat_unsigned_ ## KIND ## _type_node = \
8886 make_sat_unsigned_ ## KIND ## _type (SIZE); \
8887 KIND ## _type_node = make_signed_ ## KIND ## _type (SIZE); \
8888 unsigned_ ## KIND ## _type_node = \
8889 make_unsigned_ ## KIND ## _type (SIZE);
8891 #define MAKE_FIXED_TYPE_NODE_WIDTH(KIND,WIDTH,SIZE) \
8892 sat_ ## WIDTH ## KIND ## _type_node = \
8893 make_sat_signed_ ## KIND ## _type (SIZE); \
8894 sat_unsigned_ ## WIDTH ## KIND ## _type_node = \
8895 make_sat_unsigned_ ## KIND ## _type (SIZE); \
8896 WIDTH ## KIND ## _type_node = make_signed_ ## KIND ## _type (SIZE); \
8897 unsigned_ ## WIDTH ## KIND ## _type_node = \
8898 make_unsigned_ ## KIND ## _type (SIZE);
8900 /* Make fixed-point type nodes based on four different widths. */
8901 #define MAKE_FIXED_TYPE_NODE_FAMILY(N1,N2) \
8902 MAKE_FIXED_TYPE_NODE_WIDTH (N1, short_, SHORT_ ## N2 ## _TYPE_SIZE) \
8903 MAKE_FIXED_TYPE_NODE (N1, N2 ## _TYPE_SIZE) \
8904 MAKE_FIXED_TYPE_NODE_WIDTH (N1, long_, LONG_ ## N2 ## _TYPE_SIZE) \
8905 MAKE_FIXED_TYPE_NODE_WIDTH (N1, long_long_, LONG_LONG_ ## N2 ## _TYPE_SIZE)
8907 /* Make fixed-point mode nodes based on sat/non-sat and signed/unsigned. */
8908 #define MAKE_FIXED_MODE_NODE(KIND,NAME,MODE) \
8909 NAME ## _type_node = \
8910 make_or_reuse_signed_ ## KIND ## _type (GET_MODE_BITSIZE (MODE ## mode)); \
8911 u ## NAME ## _type_node = \
8912 make_or_reuse_unsigned_ ## KIND ## _type \
8913 (GET_MODE_BITSIZE (U ## MODE ## mode)); \
8914 sat_ ## NAME ## _type_node = \
8915 make_or_reuse_sat_signed_ ## KIND ## _type \
8916 (GET_MODE_BITSIZE (MODE ## mode)); \
8917 sat_u ## NAME ## _type_node = \
8918 make_or_reuse_sat_unsigned_ ## KIND ## _type \
8919 (GET_MODE_BITSIZE (U ## MODE ## mode));
8921 /* Fixed-point type and mode nodes. */
8922 MAKE_FIXED_TYPE_NODE_FAMILY (fract
, FRACT
)
8923 MAKE_FIXED_TYPE_NODE_FAMILY (accum
, ACCUM
)
8924 MAKE_FIXED_MODE_NODE (fract
, qq
, QQ
)
8925 MAKE_FIXED_MODE_NODE (fract
, hq
, HQ
)
8926 MAKE_FIXED_MODE_NODE (fract
, sq
, SQ
)
8927 MAKE_FIXED_MODE_NODE (fract
, dq
, DQ
)
8928 MAKE_FIXED_MODE_NODE (fract
, tq
, TQ
)
8929 MAKE_FIXED_MODE_NODE (accum
, ha
, HA
)
8930 MAKE_FIXED_MODE_NODE (accum
, sa
, SA
)
8931 MAKE_FIXED_MODE_NODE (accum
, da
, DA
)
8932 MAKE_FIXED_MODE_NODE (accum
, ta
, TA
)
8935 tree t
= targetm
.build_builtin_va_list ();
8937 /* Many back-ends define record types without setting TYPE_NAME.
8938 If we copied the record type here, we'd keep the original
8939 record type without a name. This breaks name mangling. So,
8940 don't copy record types and let c_common_nodes_and_builtins()
8941 declare the type to be __builtin_va_list. */
8942 if (TREE_CODE (t
) != RECORD_TYPE
)
8943 t
= build_variant_type_copy (t
);
8945 va_list_type_node
= t
;
8949 /* A subroutine of build_common_builtin_nodes. Define a builtin function. */
8952 local_define_builtin (const char *name
, tree type
, enum built_in_function code
,
8953 const char *library_name
, int ecf_flags
)
8957 decl
= add_builtin_function (name
, type
, code
, BUILT_IN_NORMAL
,
8958 library_name
, NULL_TREE
);
8959 if (ecf_flags
& ECF_CONST
)
8960 TREE_READONLY (decl
) = 1;
8961 if (ecf_flags
& ECF_PURE
)
8962 DECL_PURE_P (decl
) = 1;
8963 if (ecf_flags
& ECF_LOOPING_CONST_OR_PURE
)
8964 DECL_LOOPING_CONST_OR_PURE_P (decl
) = 1;
8965 if (ecf_flags
& ECF_NORETURN
)
8966 TREE_THIS_VOLATILE (decl
) = 1;
8967 if (ecf_flags
& ECF_NOTHROW
)
8968 TREE_NOTHROW (decl
) = 1;
8969 if (ecf_flags
& ECF_MALLOC
)
8970 DECL_IS_MALLOC (decl
) = 1;
8972 built_in_decls
[code
] = decl
;
8973 implicit_built_in_decls
[code
] = decl
;
8976 /* Call this function after instantiating all builtins that the language
8977 front end cares about. This will build the rest of the builtins that
8978 are relied upon by the tree optimizers and the middle-end. */
8981 build_common_builtin_nodes (void)
8983 tree tmp
, tmp2
, ftype
;
8985 if (built_in_decls
[BUILT_IN_MEMCPY
] == NULL
8986 || built_in_decls
[BUILT_IN_MEMMOVE
] == NULL
)
8988 tmp
= tree_cons (NULL_TREE
, size_type_node
, void_list_node
);
8989 tmp
= tree_cons (NULL_TREE
, const_ptr_type_node
, tmp
);
8990 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, tmp
);
8991 ftype
= build_function_type (ptr_type_node
, tmp
);
8993 if (built_in_decls
[BUILT_IN_MEMCPY
] == NULL
)
8994 local_define_builtin ("__builtin_memcpy", ftype
, BUILT_IN_MEMCPY
,
8995 "memcpy", ECF_NOTHROW
);
8996 if (built_in_decls
[BUILT_IN_MEMMOVE
] == NULL
)
8997 local_define_builtin ("__builtin_memmove", ftype
, BUILT_IN_MEMMOVE
,
8998 "memmove", ECF_NOTHROW
);
9001 if (built_in_decls
[BUILT_IN_MEMCMP
] == NULL
)
9003 tmp
= tree_cons (NULL_TREE
, size_type_node
, void_list_node
);
9004 tmp
= tree_cons (NULL_TREE
, const_ptr_type_node
, tmp
);
9005 tmp
= tree_cons (NULL_TREE
, const_ptr_type_node
, tmp
);
9006 ftype
= build_function_type (integer_type_node
, tmp
);
9007 local_define_builtin ("__builtin_memcmp", ftype
, BUILT_IN_MEMCMP
,
9008 "memcmp", ECF_PURE
| ECF_NOTHROW
);
9011 if (built_in_decls
[BUILT_IN_MEMSET
] == NULL
)
9013 tmp
= tree_cons (NULL_TREE
, size_type_node
, void_list_node
);
9014 tmp
= tree_cons (NULL_TREE
, integer_type_node
, tmp
);
9015 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, tmp
);
9016 ftype
= build_function_type (ptr_type_node
, tmp
);
9017 local_define_builtin ("__builtin_memset", ftype
, BUILT_IN_MEMSET
,
9018 "memset", ECF_NOTHROW
);
9021 if (built_in_decls
[BUILT_IN_ALLOCA
] == NULL
)
9023 tmp
= tree_cons (NULL_TREE
, size_type_node
, void_list_node
);
9024 ftype
= build_function_type (ptr_type_node
, tmp
);
9025 local_define_builtin ("__builtin_alloca", ftype
, BUILT_IN_ALLOCA
,
9027 ECF_MALLOC
| (flag_stack_check
? 0 : ECF_NOTHROW
));
9030 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
9031 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, tmp
);
9032 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, tmp
);
9033 ftype
= build_function_type (void_type_node
, tmp
);
9034 local_define_builtin ("__builtin_init_trampoline", ftype
,
9035 BUILT_IN_INIT_TRAMPOLINE
,
9036 "__builtin_init_trampoline", ECF_NOTHROW
);
9038 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
9039 ftype
= build_function_type (ptr_type_node
, tmp
);
9040 local_define_builtin ("__builtin_adjust_trampoline", ftype
,
9041 BUILT_IN_ADJUST_TRAMPOLINE
,
9042 "__builtin_adjust_trampoline",
9043 ECF_CONST
| ECF_NOTHROW
);
9045 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
9046 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, tmp
);
9047 ftype
= build_function_type (void_type_node
, tmp
);
9048 local_define_builtin ("__builtin_nonlocal_goto", ftype
,
9049 BUILT_IN_NONLOCAL_GOTO
,
9050 "__builtin_nonlocal_goto",
9051 ECF_NORETURN
| ECF_NOTHROW
);
9053 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
9054 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, tmp
);
9055 ftype
= build_function_type (void_type_node
, tmp
);
9056 local_define_builtin ("__builtin_setjmp_setup", ftype
,
9057 BUILT_IN_SETJMP_SETUP
,
9058 "__builtin_setjmp_setup", ECF_NOTHROW
);
9060 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
9061 ftype
= build_function_type (ptr_type_node
, tmp
);
9062 local_define_builtin ("__builtin_setjmp_dispatcher", ftype
,
9063 BUILT_IN_SETJMP_DISPATCHER
,
9064 "__builtin_setjmp_dispatcher",
9065 ECF_PURE
| ECF_NOTHROW
);
9067 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
9068 ftype
= build_function_type (void_type_node
, tmp
);
9069 local_define_builtin ("__builtin_setjmp_receiver", ftype
,
9070 BUILT_IN_SETJMP_RECEIVER
,
9071 "__builtin_setjmp_receiver", ECF_NOTHROW
);
9073 ftype
= build_function_type (ptr_type_node
, void_list_node
);
9074 local_define_builtin ("__builtin_stack_save", ftype
, BUILT_IN_STACK_SAVE
,
9075 "__builtin_stack_save", ECF_NOTHROW
);
9077 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
9078 ftype
= build_function_type (void_type_node
, tmp
);
9079 local_define_builtin ("__builtin_stack_restore", ftype
,
9080 BUILT_IN_STACK_RESTORE
,
9081 "__builtin_stack_restore", ECF_NOTHROW
);
9083 ftype
= build_function_type (void_type_node
, void_list_node
);
9084 local_define_builtin ("__builtin_profile_func_enter", ftype
,
9085 BUILT_IN_PROFILE_FUNC_ENTER
, "profile_func_enter", 0);
9086 local_define_builtin ("__builtin_profile_func_exit", ftype
,
9087 BUILT_IN_PROFILE_FUNC_EXIT
, "profile_func_exit", 0);
9089 /* If there's a possibility that we might use the ARM EABI, build the
9090 alternate __cxa_end_cleanup node used to resume from C++ and Java. */
9091 if (targetm
.arm_eabi_unwinder
)
9093 ftype
= build_function_type (void_type_node
, void_list_node
);
9094 local_define_builtin ("__builtin_cxa_end_cleanup", ftype
,
9095 BUILT_IN_CXA_END_CLEANUP
,
9096 "__cxa_end_cleanup", ECF_NORETURN
);
9099 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
9100 ftype
= build_function_type (void_type_node
, tmp
);
9101 local_define_builtin ("__builtin_unwind_resume", ftype
,
9102 BUILT_IN_UNWIND_RESUME
,
9103 (USING_SJLJ_EXCEPTIONS
9104 ? "_Unwind_SjLj_Resume" : "_Unwind_Resume"),
9107 /* The exception object and filter values from the runtime. The argument
9108 must be zero before exception lowering, i.e. from the front end. After
9109 exception lowering, it will be the region number for the exception
9110 landing pad. These functions are PURE instead of CONST to prevent
9111 them from being hoisted past the exception edge that will initialize
9112 its value in the landing pad. */
9113 tmp
= tree_cons (NULL_TREE
, integer_type_node
, void_list_node
);
9114 ftype
= build_function_type (ptr_type_node
, tmp
);
9115 local_define_builtin ("__builtin_eh_pointer", ftype
, BUILT_IN_EH_POINTER
,
9116 "__builtin_eh_pointer", ECF_PURE
| ECF_NOTHROW
);
9118 tmp2
= lang_hooks
.types
.type_for_mode (targetm
.eh_return_filter_mode (), 0);
9119 ftype
= build_function_type (tmp2
, tmp
);
9120 local_define_builtin ("__builtin_eh_filter", ftype
, BUILT_IN_EH_FILTER
,
9121 "__builtin_eh_filter", ECF_PURE
| ECF_NOTHROW
);
9123 tmp
= tree_cons (NULL_TREE
, integer_type_node
, void_list_node
);
9124 tmp
= tree_cons (NULL_TREE
, integer_type_node
, tmp
);
9125 ftype
= build_function_type (void_type_node
, tmp
);
9126 local_define_builtin ("__builtin_eh_copy_values", ftype
,
9127 BUILT_IN_EH_COPY_VALUES
,
9128 "__builtin_eh_copy_values", ECF_NOTHROW
);
9130 /* Complex multiplication and division. These are handled as builtins
9131 rather than optabs because emit_library_call_value doesn't support
9132 complex. Further, we can do slightly better with folding these
9133 beasties if the real and complex parts of the arguments are separate. */
9137 for (mode
= MIN_MODE_COMPLEX_FLOAT
; mode
<= MAX_MODE_COMPLEX_FLOAT
; ++mode
)
9139 char mode_name_buf
[4], *q
;
9141 enum built_in_function mcode
, dcode
;
9142 tree type
, inner_type
;
9144 type
= lang_hooks
.types
.type_for_mode ((enum machine_mode
) mode
, 0);
9147 inner_type
= TREE_TYPE (type
);
9149 tmp
= tree_cons (NULL_TREE
, inner_type
, void_list_node
);
9150 tmp
= tree_cons (NULL_TREE
, inner_type
, tmp
);
9151 tmp
= tree_cons (NULL_TREE
, inner_type
, tmp
);
9152 tmp
= tree_cons (NULL_TREE
, inner_type
, tmp
);
9153 ftype
= build_function_type (type
, tmp
);
9155 mcode
= ((enum built_in_function
)
9156 (BUILT_IN_COMPLEX_MUL_MIN
+ mode
- MIN_MODE_COMPLEX_FLOAT
));
9157 dcode
= ((enum built_in_function
)
9158 (BUILT_IN_COMPLEX_DIV_MIN
+ mode
- MIN_MODE_COMPLEX_FLOAT
));
9160 for (p
= GET_MODE_NAME (mode
), q
= mode_name_buf
; *p
; p
++, q
++)
9164 built_in_names
[mcode
] = concat ("__mul", mode_name_buf
, "3", NULL
);
9165 local_define_builtin (built_in_names
[mcode
], ftype
, mcode
,
9166 built_in_names
[mcode
], ECF_CONST
| ECF_NOTHROW
);
9168 built_in_names
[dcode
] = concat ("__div", mode_name_buf
, "3", NULL
);
9169 local_define_builtin (built_in_names
[dcode
], ftype
, dcode
,
9170 built_in_names
[dcode
], ECF_CONST
| ECF_NOTHROW
);
9175 /* HACK. GROSS. This is absolutely disgusting. I wish there was a
9178 If we requested a pointer to a vector, build up the pointers that
9179 we stripped off while looking for the inner type. Similarly for
9180 return values from functions.
9182 The argument TYPE is the top of the chain, and BOTTOM is the
9183 new type which we will point to. */
9186 reconstruct_complex_type (tree type
, tree bottom
)
9190 if (TREE_CODE (type
) == POINTER_TYPE
)
9192 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
9193 outer
= build_pointer_type_for_mode (inner
, TYPE_MODE (type
),
9194 TYPE_REF_CAN_ALIAS_ALL (type
));
9196 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9198 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
9199 outer
= build_reference_type_for_mode (inner
, TYPE_MODE (type
),
9200 TYPE_REF_CAN_ALIAS_ALL (type
));
9202 else if (TREE_CODE (type
) == ARRAY_TYPE
)
9204 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
9205 outer
= build_array_type (inner
, TYPE_DOMAIN (type
));
9207 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9209 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
9210 outer
= build_function_type (inner
, TYPE_ARG_TYPES (type
));
9212 else if (TREE_CODE (type
) == METHOD_TYPE
)
9214 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
9215 /* The build_method_type_directly() routine prepends 'this' to argument list,
9216 so we must compensate by getting rid of it. */
9218 = build_method_type_directly
9219 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (type
))),
9221 TREE_CHAIN (TYPE_ARG_TYPES (type
)));
9223 else if (TREE_CODE (type
) == OFFSET_TYPE
)
9225 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
9226 outer
= build_offset_type (TYPE_OFFSET_BASETYPE (type
), inner
);
9231 return build_type_attribute_qual_variant (outer
, TYPE_ATTRIBUTES (type
),
9235 /* Returns a vector tree node given a mode (integer, vector, or BLKmode) and
9238 build_vector_type_for_mode (tree innertype
, enum machine_mode mode
)
9242 switch (GET_MODE_CLASS (mode
))
9244 case MODE_VECTOR_INT
:
9245 case MODE_VECTOR_FLOAT
:
9246 case MODE_VECTOR_FRACT
:
9247 case MODE_VECTOR_UFRACT
:
9248 case MODE_VECTOR_ACCUM
:
9249 case MODE_VECTOR_UACCUM
:
9250 nunits
= GET_MODE_NUNITS (mode
);
9254 /* Check that there are no leftover bits. */
9255 gcc_assert (GET_MODE_BITSIZE (mode
)
9256 % TREE_INT_CST_LOW (TYPE_SIZE (innertype
)) == 0);
9258 nunits
= GET_MODE_BITSIZE (mode
)
9259 / TREE_INT_CST_LOW (TYPE_SIZE (innertype
));
9266 return make_vector_type (innertype
, nunits
, mode
);
9269 /* Similarly, but takes the inner type and number of units, which must be
9273 build_vector_type (tree innertype
, int nunits
)
9275 return make_vector_type (innertype
, nunits
, VOIDmode
);
9278 /* Similarly, but takes the inner type and number of units, which must be
9282 build_opaque_vector_type (tree innertype
, int nunits
)
9285 innertype
= build_distinct_type_copy (innertype
);
9286 t
= make_vector_type (innertype
, nunits
, VOIDmode
);
9287 TYPE_VECTOR_OPAQUE (t
) = true;
9292 /* Given an initializer INIT, return TRUE if INIT is zero or some
9293 aggregate of zeros. Otherwise return FALSE. */
9295 initializer_zerop (const_tree init
)
9301 switch (TREE_CODE (init
))
9304 return integer_zerop (init
);
9307 /* ??? Note that this is not correct for C4X float formats. There,
9308 a bit pattern of all zeros is 1.0; 0.0 is encoded with the most
9309 negative exponent. */
9310 return real_zerop (init
)
9311 && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (init
));
9314 return fixed_zerop (init
);
9317 return integer_zerop (init
)
9318 || (real_zerop (init
)
9319 && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (TREE_REALPART (init
)))
9320 && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (TREE_IMAGPART (init
))));
9323 for (elt
= TREE_VECTOR_CST_ELTS (init
); elt
; elt
= TREE_CHAIN (elt
))
9324 if (!initializer_zerop (TREE_VALUE (elt
)))
9330 unsigned HOST_WIDE_INT idx
;
9332 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (init
), idx
, elt
)
9333 if (!initializer_zerop (elt
))
9343 /* Build an empty statement at location LOC. */
9346 build_empty_stmt (location_t loc
)
9348 tree t
= build1 (NOP_EXPR
, void_type_node
, size_zero_node
);
9349 SET_EXPR_LOCATION (t
, loc
);
9354 /* Build an OpenMP clause with code CODE. LOC is the location of the
9358 build_omp_clause (location_t loc
, enum omp_clause_code code
)
9363 length
= omp_clause_num_ops
[code
];
9364 size
= (sizeof (struct tree_omp_clause
) + (length
- 1) * sizeof (tree
));
9366 t
= GGC_NEWVAR (union tree_node
, size
);
9367 memset (t
, 0, size
);
9368 TREE_SET_CODE (t
, OMP_CLAUSE
);
9369 OMP_CLAUSE_SET_CODE (t
, code
);
9370 OMP_CLAUSE_LOCATION (t
) = loc
;
9372 #ifdef GATHER_STATISTICS
9373 tree_node_counts
[(int) omp_clause_kind
]++;
9374 tree_node_sizes
[(int) omp_clause_kind
] += size
;
9380 /* Build a tcc_vl_exp object with code CODE and room for LEN operands. LEN
9381 includes the implicit operand count in TREE_OPERAND 0, and so must be >= 1.
9382 Except for the CODE and operand count field, other storage for the
9383 object is initialized to zeros. */
9386 build_vl_exp_stat (enum tree_code code
, int len MEM_STAT_DECL
)
9389 int length
= (len
- 1) * sizeof (tree
) + sizeof (struct tree_exp
);
9391 gcc_assert (TREE_CODE_CLASS (code
) == tcc_vl_exp
);
9392 gcc_assert (len
>= 1);
9394 #ifdef GATHER_STATISTICS
9395 tree_node_counts
[(int) e_kind
]++;
9396 tree_node_sizes
[(int) e_kind
] += length
;
9399 t
= (tree
) ggc_alloc_zone_pass_stat (length
, &tree_zone
);
9401 memset (t
, 0, length
);
9403 TREE_SET_CODE (t
, code
);
9405 /* Can't use TREE_OPERAND to store the length because if checking is
9406 enabled, it will try to check the length before we store it. :-P */
9407 t
->exp
.operands
[0] = build_int_cst (sizetype
, len
);
9413 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE
9414 and FN and a null static chain slot. ARGLIST is a TREE_LIST of the
9418 build_call_list (tree return_type
, tree fn
, tree arglist
)
9423 t
= build_vl_exp (CALL_EXPR
, list_length (arglist
) + 3);
9424 TREE_TYPE (t
) = return_type
;
9425 CALL_EXPR_FN (t
) = fn
;
9426 CALL_EXPR_STATIC_CHAIN (t
) = NULL_TREE
;
9427 for (i
= 0; arglist
; arglist
= TREE_CHAIN (arglist
), i
++)
9428 CALL_EXPR_ARG (t
, i
) = TREE_VALUE (arglist
);
9429 process_call_operands (t
);
9433 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and
9434 FN and a null static chain slot. NARGS is the number of call arguments
9435 which are specified as "..." arguments. */
9438 build_call_nary (tree return_type
, tree fn
, int nargs
, ...)
9442 va_start (args
, nargs
);
9443 ret
= build_call_valist (return_type
, fn
, nargs
, args
);
9448 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and
9449 FN and a null static chain slot. NARGS is the number of call arguments
9450 which are specified as a va_list ARGS. */
9453 build_call_valist (tree return_type
, tree fn
, int nargs
, va_list args
)
9458 t
= build_vl_exp (CALL_EXPR
, nargs
+ 3);
9459 TREE_TYPE (t
) = return_type
;
9460 CALL_EXPR_FN (t
) = fn
;
9461 CALL_EXPR_STATIC_CHAIN (t
) = NULL_TREE
;
9462 for (i
= 0; i
< nargs
; i
++)
9463 CALL_EXPR_ARG (t
, i
) = va_arg (args
, tree
);
9464 process_call_operands (t
);
9468 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and
9469 FN and a null static chain slot. NARGS is the number of call arguments
9470 which are specified as a tree array ARGS. */
9473 build_call_array_loc (location_t loc
, tree return_type
, tree fn
,
9474 int nargs
, const tree
*args
)
9479 t
= build_vl_exp (CALL_EXPR
, nargs
+ 3);
9480 TREE_TYPE (t
) = return_type
;
9481 CALL_EXPR_FN (t
) = fn
;
9482 CALL_EXPR_STATIC_CHAIN (t
) = NULL_TREE
;
9483 for (i
= 0; i
< nargs
; i
++)
9484 CALL_EXPR_ARG (t
, i
) = args
[i
];
9485 process_call_operands (t
);
9486 SET_EXPR_LOCATION (t
, loc
);
9490 /* Like build_call_array, but takes a VEC. */
9493 build_call_vec (tree return_type
, tree fn
, VEC(tree
,gc
) *args
)
9498 ret
= build_vl_exp (CALL_EXPR
, VEC_length (tree
, args
) + 3);
9499 TREE_TYPE (ret
) = return_type
;
9500 CALL_EXPR_FN (ret
) = fn
;
9501 CALL_EXPR_STATIC_CHAIN (ret
) = NULL_TREE
;
9502 for (ix
= 0; VEC_iterate (tree
, args
, ix
, t
); ++ix
)
9503 CALL_EXPR_ARG (ret
, ix
) = t
;
9504 process_call_operands (ret
);
9509 /* Returns true if it is possible to prove that the index of
9510 an array access REF (an ARRAY_REF expression) falls into the
9514 in_array_bounds_p (tree ref
)
9516 tree idx
= TREE_OPERAND (ref
, 1);
9519 if (TREE_CODE (idx
) != INTEGER_CST
)
9522 min
= array_ref_low_bound (ref
);
9523 max
= array_ref_up_bound (ref
);
9526 || TREE_CODE (min
) != INTEGER_CST
9527 || TREE_CODE (max
) != INTEGER_CST
)
9530 if (tree_int_cst_lt (idx
, min
)
9531 || tree_int_cst_lt (max
, idx
))
9537 /* Returns true if it is possible to prove that the range of
9538 an array access REF (an ARRAY_RANGE_REF expression) falls
9539 into the array bounds. */
9542 range_in_array_bounds_p (tree ref
)
9544 tree domain_type
= TYPE_DOMAIN (TREE_TYPE (ref
));
9545 tree range_min
, range_max
, min
, max
;
9547 range_min
= TYPE_MIN_VALUE (domain_type
);
9548 range_max
= TYPE_MAX_VALUE (domain_type
);
9551 || TREE_CODE (range_min
) != INTEGER_CST
9552 || TREE_CODE (range_max
) != INTEGER_CST
)
9555 min
= array_ref_low_bound (ref
);
9556 max
= array_ref_up_bound (ref
);
9559 || TREE_CODE (min
) != INTEGER_CST
9560 || TREE_CODE (max
) != INTEGER_CST
)
9563 if (tree_int_cst_lt (range_min
, min
)
9564 || tree_int_cst_lt (max
, range_max
))
9570 /* Return true if T (assumed to be a DECL) must be assigned a memory
9574 needs_to_live_in_memory (const_tree t
)
9576 if (TREE_CODE (t
) == SSA_NAME
)
9577 t
= SSA_NAME_VAR (t
);
9579 return (TREE_ADDRESSABLE (t
)
9580 || is_global_var (t
)
9581 || (TREE_CODE (t
) == RESULT_DECL
9582 && aggregate_value_p (t
, current_function_decl
)));
9585 /* There are situations in which a language considers record types
9586 compatible which have different field lists. Decide if two fields
9587 are compatible. It is assumed that the parent records are compatible. */
9590 fields_compatible_p (const_tree f1
, const_tree f2
)
9592 if (!operand_equal_p (DECL_FIELD_BIT_OFFSET (f1
),
9593 DECL_FIELD_BIT_OFFSET (f2
), OEP_ONLY_CONST
))
9596 if (!operand_equal_p (DECL_FIELD_OFFSET (f1
),
9597 DECL_FIELD_OFFSET (f2
), OEP_ONLY_CONST
))
9600 if (!types_compatible_p (TREE_TYPE (f1
), TREE_TYPE (f2
)))
9606 /* Locate within RECORD a field that is compatible with ORIG_FIELD. */
9609 find_compatible_field (tree record
, tree orig_field
)
9613 for (f
= TYPE_FIELDS (record
); f
; f
= TREE_CHAIN (f
))
9614 if (TREE_CODE (f
) == FIELD_DECL
9615 && fields_compatible_p (f
, orig_field
))
9618 /* ??? Why isn't this on the main fields list? */
9619 f
= TYPE_VFIELD (record
);
9620 if (f
&& TREE_CODE (f
) == FIELD_DECL
9621 && fields_compatible_p (f
, orig_field
))
9624 /* ??? We should abort here, but Java appears to do Bad Things
9625 with inherited fields. */
9629 /* Return value of a constant X and sign-extend it. */
9632 int_cst_value (const_tree x
)
9634 unsigned bits
= TYPE_PRECISION (TREE_TYPE (x
));
9635 unsigned HOST_WIDE_INT val
= TREE_INT_CST_LOW (x
);
9637 /* Make sure the sign-extended value will fit in a HOST_WIDE_INT. */
9638 gcc_assert (TREE_INT_CST_HIGH (x
) == 0
9639 || TREE_INT_CST_HIGH (x
) == -1);
9641 if (bits
< HOST_BITS_PER_WIDE_INT
)
9643 bool negative
= ((val
>> (bits
- 1)) & 1) != 0;
9645 val
|= (~(unsigned HOST_WIDE_INT
) 0) << (bits
- 1) << 1;
9647 val
&= ~((~(unsigned HOST_WIDE_INT
) 0) << (bits
- 1) << 1);
9653 /* Return value of a constant X and sign-extend it. */
9656 widest_int_cst_value (const_tree x
)
9658 unsigned bits
= TYPE_PRECISION (TREE_TYPE (x
));
9659 unsigned HOST_WIDEST_INT val
= TREE_INT_CST_LOW (x
);
9661 #if HOST_BITS_PER_WIDEST_INT > HOST_BITS_PER_WIDE_INT
9662 gcc_assert (HOST_BITS_PER_WIDEST_INT
>= 2 * HOST_BITS_PER_WIDE_INT
);
9663 val
|= (((unsigned HOST_WIDEST_INT
) TREE_INT_CST_HIGH (x
))
9664 << HOST_BITS_PER_WIDE_INT
);
9666 /* Make sure the sign-extended value will fit in a HOST_WIDE_INT. */
9667 gcc_assert (TREE_INT_CST_HIGH (x
) == 0
9668 || TREE_INT_CST_HIGH (x
) == -1);
9671 if (bits
< HOST_BITS_PER_WIDEST_INT
)
9673 bool negative
= ((val
>> (bits
- 1)) & 1) != 0;
9675 val
|= (~(unsigned HOST_WIDEST_INT
) 0) << (bits
- 1) << 1;
9677 val
&= ~((~(unsigned HOST_WIDEST_INT
) 0) << (bits
- 1) << 1);
9683 /* If TYPE is an integral type, return an equivalent type which is
9684 unsigned iff UNSIGNEDP is true. If TYPE is not an integral type,
9685 return TYPE itself. */
9688 signed_or_unsigned_type_for (int unsignedp
, tree type
)
9691 if (POINTER_TYPE_P (type
))
9693 /* If the pointer points to the normal address space, use the
9694 size_type_node. Otherwise use an appropriate size for the pointer
9695 based on the named address space it points to. */
9696 if (!TYPE_ADDR_SPACE (TREE_TYPE (t
)))
9699 return lang_hooks
.types
.type_for_size (TYPE_PRECISION (t
), unsignedp
);
9702 if (!INTEGRAL_TYPE_P (t
) || TYPE_UNSIGNED (t
) == unsignedp
)
9705 return lang_hooks
.types
.type_for_size (TYPE_PRECISION (t
), unsignedp
);
9708 /* Returns unsigned variant of TYPE. */
9711 unsigned_type_for (tree type
)
9713 return signed_or_unsigned_type_for (1, type
);
9716 /* Returns signed variant of TYPE. */
9719 signed_type_for (tree type
)
9721 return signed_or_unsigned_type_for (0, type
);
9724 /* Returns the largest value obtainable by casting something in INNER type to
9728 upper_bound_in_type (tree outer
, tree inner
)
9730 unsigned HOST_WIDE_INT lo
, hi
;
9731 unsigned int det
= 0;
9732 unsigned oprec
= TYPE_PRECISION (outer
);
9733 unsigned iprec
= TYPE_PRECISION (inner
);
9736 /* Compute a unique number for every combination. */
9737 det
|= (oprec
> iprec
) ? 4 : 0;
9738 det
|= TYPE_UNSIGNED (outer
) ? 2 : 0;
9739 det
|= TYPE_UNSIGNED (inner
) ? 1 : 0;
9741 /* Determine the exponent to use. */
9746 /* oprec <= iprec, outer: signed, inner: don't care. */
9751 /* oprec <= iprec, outer: unsigned, inner: don't care. */
9755 /* oprec > iprec, outer: signed, inner: signed. */
9759 /* oprec > iprec, outer: signed, inner: unsigned. */
9763 /* oprec > iprec, outer: unsigned, inner: signed. */
9767 /* oprec > iprec, outer: unsigned, inner: unsigned. */
9774 /* Compute 2^^prec - 1. */
9775 if (prec
<= HOST_BITS_PER_WIDE_INT
)
9778 lo
= ((~(unsigned HOST_WIDE_INT
) 0)
9779 >> (HOST_BITS_PER_WIDE_INT
- prec
));
9783 hi
= ((~(unsigned HOST_WIDE_INT
) 0)
9784 >> (2 * HOST_BITS_PER_WIDE_INT
- prec
));
9785 lo
= ~(unsigned HOST_WIDE_INT
) 0;
9788 return build_int_cst_wide (outer
, lo
, hi
);
9791 /* Returns the smallest value obtainable by casting something in INNER type to
9795 lower_bound_in_type (tree outer
, tree inner
)
9797 unsigned HOST_WIDE_INT lo
, hi
;
9798 unsigned oprec
= TYPE_PRECISION (outer
);
9799 unsigned iprec
= TYPE_PRECISION (inner
);
9801 /* If OUTER type is unsigned, we can definitely cast 0 to OUTER type
9803 if (TYPE_UNSIGNED (outer
)
9804 /* If we are widening something of an unsigned type, OUTER type
9805 contains all values of INNER type. In particular, both INNER
9806 and OUTER types have zero in common. */
9807 || (oprec
> iprec
&& TYPE_UNSIGNED (inner
)))
9811 /* If we are widening a signed type to another signed type, we
9812 want to obtain -2^^(iprec-1). If we are keeping the
9813 precision or narrowing to a signed type, we want to obtain
9815 unsigned prec
= oprec
> iprec
? iprec
: oprec
;
9817 if (prec
<= HOST_BITS_PER_WIDE_INT
)
9819 hi
= ~(unsigned HOST_WIDE_INT
) 0;
9820 lo
= (~(unsigned HOST_WIDE_INT
) 0) << (prec
- 1);
9824 hi
= ((~(unsigned HOST_WIDE_INT
) 0)
9825 << (prec
- HOST_BITS_PER_WIDE_INT
- 1));
9830 return build_int_cst_wide (outer
, lo
, hi
);
9833 /* Return nonzero if two operands that are suitable for PHI nodes are
9834 necessarily equal. Specifically, both ARG0 and ARG1 must be either
9835 SSA_NAME or invariant. Note that this is strictly an optimization.
9836 That is, callers of this function can directly call operand_equal_p
9837 and get the same result, only slower. */
9840 operand_equal_for_phi_arg_p (const_tree arg0
, const_tree arg1
)
9844 if (TREE_CODE (arg0
) == SSA_NAME
|| TREE_CODE (arg1
) == SSA_NAME
)
9846 return operand_equal_p (arg0
, arg1
, 0);
9849 /* Returns number of zeros at the end of binary representation of X.
9851 ??? Use ffs if available? */
9854 num_ending_zeros (const_tree x
)
9856 unsigned HOST_WIDE_INT fr
, nfr
;
9857 unsigned num
, abits
;
9858 tree type
= TREE_TYPE (x
);
9860 if (TREE_INT_CST_LOW (x
) == 0)
9862 num
= HOST_BITS_PER_WIDE_INT
;
9863 fr
= TREE_INT_CST_HIGH (x
);
9868 fr
= TREE_INT_CST_LOW (x
);
9871 for (abits
= HOST_BITS_PER_WIDE_INT
/ 2; abits
; abits
/= 2)
9874 if (nfr
<< abits
== fr
)
9881 if (num
> TYPE_PRECISION (type
))
9882 num
= TYPE_PRECISION (type
);
9884 return build_int_cst_type (type
, num
);
9888 #define WALK_SUBTREE(NODE) \
9891 result = walk_tree_1 (&(NODE), func, data, pset, lh); \
9897 /* This is a subroutine of walk_tree that walks field of TYPE that are to
9898 be walked whenever a type is seen in the tree. Rest of operands and return
9899 value are as for walk_tree. */
9902 walk_type_fields (tree type
, walk_tree_fn func
, void *data
,
9903 struct pointer_set_t
*pset
, walk_tree_lh lh
)
9905 tree result
= NULL_TREE
;
9907 switch (TREE_CODE (type
))
9910 case REFERENCE_TYPE
:
9911 /* We have to worry about mutually recursive pointers. These can't
9912 be written in C. They can in Ada. It's pathological, but
9913 there's an ACATS test (c38102a) that checks it. Deal with this
9914 by checking if we're pointing to another pointer, that one
9915 points to another pointer, that one does too, and we have no htab.
9916 If so, get a hash table. We check three levels deep to avoid
9917 the cost of the hash table if we don't need one. */
9918 if (POINTER_TYPE_P (TREE_TYPE (type
))
9919 && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (type
)))
9920 && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (TREE_TYPE (type
))))
9923 result
= walk_tree_without_duplicates (&TREE_TYPE (type
),
9931 /* ... fall through ... */
9934 WALK_SUBTREE (TREE_TYPE (type
));
9938 WALK_SUBTREE (TYPE_METHOD_BASETYPE (type
));
9943 WALK_SUBTREE (TREE_TYPE (type
));
9947 /* We never want to walk into default arguments. */
9948 for (arg
= TYPE_ARG_TYPES (type
); arg
; arg
= TREE_CHAIN (arg
))
9949 WALK_SUBTREE (TREE_VALUE (arg
));
9954 /* Don't follow this nodes's type if a pointer for fear that
9955 we'll have infinite recursion. If we have a PSET, then we
9958 || (!POINTER_TYPE_P (TREE_TYPE (type
))
9959 && TREE_CODE (TREE_TYPE (type
)) != OFFSET_TYPE
))
9960 WALK_SUBTREE (TREE_TYPE (type
));
9961 WALK_SUBTREE (TYPE_DOMAIN (type
));
9965 WALK_SUBTREE (TREE_TYPE (type
));
9966 WALK_SUBTREE (TYPE_OFFSET_BASETYPE (type
));
9976 /* Apply FUNC to all the sub-trees of TP in a pre-order traversal. FUNC is
9977 called with the DATA and the address of each sub-tree. If FUNC returns a
9978 non-NULL value, the traversal is stopped, and the value returned by FUNC
9979 is returned. If PSET is non-NULL it is used to record the nodes visited,
9980 and to avoid visiting a node more than once. */
9983 walk_tree_1 (tree
*tp
, walk_tree_fn func
, void *data
,
9984 struct pointer_set_t
*pset
, walk_tree_lh lh
)
9986 enum tree_code code
;
9990 #define WALK_SUBTREE_TAIL(NODE) \
9994 goto tail_recurse; \
9999 /* Skip empty subtrees. */
10003 /* Don't walk the same tree twice, if the user has requested
10004 that we avoid doing so. */
10005 if (pset
&& pointer_set_insert (pset
, *tp
))
10008 /* Call the function. */
10010 result
= (*func
) (tp
, &walk_subtrees
, data
);
10012 /* If we found something, return it. */
10016 code
= TREE_CODE (*tp
);
10018 /* Even if we didn't, FUNC may have decided that there was nothing
10019 interesting below this point in the tree. */
10020 if (!walk_subtrees
)
10022 /* But we still need to check our siblings. */
10023 if (code
== TREE_LIST
)
10024 WALK_SUBTREE_TAIL (TREE_CHAIN (*tp
));
10025 else if (code
== OMP_CLAUSE
)
10026 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
10033 result
= (*lh
) (tp
, &walk_subtrees
, func
, data
, pset
);
10034 if (result
|| !walk_subtrees
)
10041 case IDENTIFIER_NODE
:
10048 case PLACEHOLDER_EXPR
:
10052 /* None of these have subtrees other than those already walked
10057 WALK_SUBTREE (TREE_VALUE (*tp
));
10058 WALK_SUBTREE_TAIL (TREE_CHAIN (*tp
));
10063 int len
= TREE_VEC_LENGTH (*tp
);
10068 /* Walk all elements but the first. */
10070 WALK_SUBTREE (TREE_VEC_ELT (*tp
, len
));
10072 /* Now walk the first one as a tail call. */
10073 WALK_SUBTREE_TAIL (TREE_VEC_ELT (*tp
, 0));
10077 WALK_SUBTREE (TREE_REALPART (*tp
));
10078 WALK_SUBTREE_TAIL (TREE_IMAGPART (*tp
));
10082 unsigned HOST_WIDE_INT idx
;
10083 constructor_elt
*ce
;
10086 VEC_iterate(constructor_elt
, CONSTRUCTOR_ELTS (*tp
), idx
, ce
);
10088 WALK_SUBTREE (ce
->value
);
10093 WALK_SUBTREE_TAIL (TREE_OPERAND (*tp
, 0));
10098 for (decl
= BIND_EXPR_VARS (*tp
); decl
; decl
= TREE_CHAIN (decl
))
10100 /* Walk the DECL_INITIAL and DECL_SIZE. We don't want to walk
10101 into declarations that are just mentioned, rather than
10102 declared; they don't really belong to this part of the tree.
10103 And, we can see cycles: the initializer for a declaration
10104 can refer to the declaration itself. */
10105 WALK_SUBTREE (DECL_INITIAL (decl
));
10106 WALK_SUBTREE (DECL_SIZE (decl
));
10107 WALK_SUBTREE (DECL_SIZE_UNIT (decl
));
10109 WALK_SUBTREE_TAIL (BIND_EXPR_BODY (*tp
));
10112 case STATEMENT_LIST
:
10114 tree_stmt_iterator i
;
10115 for (i
= tsi_start (*tp
); !tsi_end_p (i
); tsi_next (&i
))
10116 WALK_SUBTREE (*tsi_stmt_ptr (i
));
10121 switch (OMP_CLAUSE_CODE (*tp
))
10123 case OMP_CLAUSE_PRIVATE
:
10124 case OMP_CLAUSE_SHARED
:
10125 case OMP_CLAUSE_FIRSTPRIVATE
:
10126 case OMP_CLAUSE_COPYIN
:
10127 case OMP_CLAUSE_COPYPRIVATE
:
10128 case OMP_CLAUSE_IF
:
10129 case OMP_CLAUSE_NUM_THREADS
:
10130 case OMP_CLAUSE_SCHEDULE
:
10131 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, 0));
10134 case OMP_CLAUSE_NOWAIT
:
10135 case OMP_CLAUSE_ORDERED
:
10136 case OMP_CLAUSE_DEFAULT
:
10137 case OMP_CLAUSE_UNTIED
:
10138 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
10140 case OMP_CLAUSE_LASTPRIVATE
:
10141 WALK_SUBTREE (OMP_CLAUSE_DECL (*tp
));
10142 WALK_SUBTREE (OMP_CLAUSE_LASTPRIVATE_STMT (*tp
));
10143 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
10145 case OMP_CLAUSE_COLLAPSE
:
10148 for (i
= 0; i
< 3; i
++)
10149 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, i
));
10150 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
10153 case OMP_CLAUSE_REDUCTION
:
10156 for (i
= 0; i
< 4; i
++)
10157 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, i
));
10158 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
10162 gcc_unreachable ();
10170 /* TARGET_EXPRs are peculiar: operands 1 and 3 can be the same.
10171 But, we only want to walk once. */
10172 len
= (TREE_OPERAND (*tp
, 3) == TREE_OPERAND (*tp
, 1)) ? 2 : 3;
10173 for (i
= 0; i
< len
; ++i
)
10174 WALK_SUBTREE (TREE_OPERAND (*tp
, i
));
10175 WALK_SUBTREE_TAIL (TREE_OPERAND (*tp
, len
));
10179 /* If this is a TYPE_DECL, walk into the fields of the type that it's
10180 defining. We only want to walk into these fields of a type in this
10181 case and not in the general case of a mere reference to the type.
10183 The criterion is as follows: if the field can be an expression, it
10184 must be walked only here. This should be in keeping with the fields
10185 that are directly gimplified in gimplify_type_sizes in order for the
10186 mark/copy-if-shared/unmark machinery of the gimplifier to work with
10187 variable-sized types.
10189 Note that DECLs get walked as part of processing the BIND_EXPR. */
10190 if (TREE_CODE (DECL_EXPR_DECL (*tp
)) == TYPE_DECL
)
10192 tree
*type_p
= &TREE_TYPE (DECL_EXPR_DECL (*tp
));
10193 if (TREE_CODE (*type_p
) == ERROR_MARK
)
10196 /* Call the function for the type. See if it returns anything or
10197 doesn't want us to continue. If we are to continue, walk both
10198 the normal fields and those for the declaration case. */
10199 result
= (*func
) (type_p
, &walk_subtrees
, data
);
10200 if (result
|| !walk_subtrees
)
10203 result
= walk_type_fields (*type_p
, func
, data
, pset
, lh
);
10207 /* If this is a record type, also walk the fields. */
10208 if (RECORD_OR_UNION_TYPE_P (*type_p
))
10212 for (field
= TYPE_FIELDS (*type_p
); field
;
10213 field
= TREE_CHAIN (field
))
10215 /* We'd like to look at the type of the field, but we can
10216 easily get infinite recursion. So assume it's pointed
10217 to elsewhere in the tree. Also, ignore things that
10219 if (TREE_CODE (field
) != FIELD_DECL
)
10222 WALK_SUBTREE (DECL_FIELD_OFFSET (field
));
10223 WALK_SUBTREE (DECL_SIZE (field
));
10224 WALK_SUBTREE (DECL_SIZE_UNIT (field
));
10225 if (TREE_CODE (*type_p
) == QUAL_UNION_TYPE
)
10226 WALK_SUBTREE (DECL_QUALIFIER (field
));
10230 /* Same for scalar types. */
10231 else if (TREE_CODE (*type_p
) == BOOLEAN_TYPE
10232 || TREE_CODE (*type_p
) == ENUMERAL_TYPE
10233 || TREE_CODE (*type_p
) == INTEGER_TYPE
10234 || TREE_CODE (*type_p
) == FIXED_POINT_TYPE
10235 || TREE_CODE (*type_p
) == REAL_TYPE
)
10237 WALK_SUBTREE (TYPE_MIN_VALUE (*type_p
));
10238 WALK_SUBTREE (TYPE_MAX_VALUE (*type_p
));
10241 WALK_SUBTREE (TYPE_SIZE (*type_p
));
10242 WALK_SUBTREE_TAIL (TYPE_SIZE_UNIT (*type_p
));
10247 if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code
)))
10251 /* Walk over all the sub-trees of this operand. */
10252 len
= TREE_OPERAND_LENGTH (*tp
);
10254 /* Go through the subtrees. We need to do this in forward order so
10255 that the scope of a FOR_EXPR is handled properly. */
10258 for (i
= 0; i
< len
- 1; ++i
)
10259 WALK_SUBTREE (TREE_OPERAND (*tp
, i
));
10260 WALK_SUBTREE_TAIL (TREE_OPERAND (*tp
, len
- 1));
10263 /* If this is a type, walk the needed fields in the type. */
10264 else if (TYPE_P (*tp
))
10265 return walk_type_fields (*tp
, func
, data
, pset
, lh
);
10269 /* We didn't find what we were looking for. */
10272 #undef WALK_SUBTREE_TAIL
10274 #undef WALK_SUBTREE
10276 /* Like walk_tree, but does not walk duplicate nodes more than once. */
10279 walk_tree_without_duplicates_1 (tree
*tp
, walk_tree_fn func
, void *data
,
10283 struct pointer_set_t
*pset
;
10285 pset
= pointer_set_create ();
10286 result
= walk_tree_1 (tp
, func
, data
, pset
, lh
);
10287 pointer_set_destroy (pset
);
10293 tree_block (tree t
)
10295 char const c
= TREE_CODE_CLASS (TREE_CODE (t
));
10297 if (IS_EXPR_CODE_CLASS (c
))
10298 return &t
->exp
.block
;
10299 gcc_unreachable ();
10303 /* Build and return a TREE_LIST of arguments in the CALL_EXPR exp.
10304 FIXME: don't use this function. It exists for compatibility with
10305 the old representation of CALL_EXPRs where a list was used to hold the
10306 arguments. Places that currently extract the arglist from a CALL_EXPR
10307 ought to be rewritten to use the CALL_EXPR itself. */
10309 call_expr_arglist (tree exp
)
10311 tree arglist
= NULL_TREE
;
10313 for (i
= call_expr_nargs (exp
) - 1; i
>= 0; i
--)
10314 arglist
= tree_cons (NULL_TREE
, CALL_EXPR_ARG (exp
, i
), arglist
);
10319 /* Create a nameless artificial label and put it in the current
10320 function context. The label has a location of LOC. Returns the
10321 newly created label. */
10324 create_artificial_label (location_t loc
)
10326 tree lab
= build_decl (loc
,
10327 LABEL_DECL
, NULL_TREE
, void_type_node
);
10329 DECL_ARTIFICIAL (lab
) = 1;
10330 DECL_IGNORED_P (lab
) = 1;
10331 DECL_CONTEXT (lab
) = current_function_decl
;
10335 /* Given a tree, try to return a useful variable name that we can use
10336 to prefix a temporary that is being assigned the value of the tree.
10337 I.E. given <temp> = &A, return A. */
10342 tree stripped_decl
;
10345 STRIP_NOPS (stripped_decl
);
10346 if (DECL_P (stripped_decl
) && DECL_NAME (stripped_decl
))
10347 return IDENTIFIER_POINTER (DECL_NAME (stripped_decl
));
10350 switch (TREE_CODE (stripped_decl
))
10353 return get_name (TREE_OPERAND (stripped_decl
, 0));
10360 /* Return true if TYPE has a variable argument list. */
10363 stdarg_p (tree fntype
)
10365 function_args_iterator args_iter
;
10366 tree n
= NULL_TREE
, t
;
10371 FOREACH_FUNCTION_ARGS(fntype
, t
, args_iter
)
10376 return n
!= NULL_TREE
&& n
!= void_type_node
;
10379 /* Return true if TYPE has a prototype. */
10382 prototype_p (tree fntype
)
10386 gcc_assert (fntype
!= NULL_TREE
);
10388 t
= TYPE_ARG_TYPES (fntype
);
10389 return (t
!= NULL_TREE
);
10392 /* If BLOCK is inlined from an __attribute__((__artificial__))
10393 routine, return pointer to location from where it has been
10396 block_nonartificial_location (tree block
)
10398 location_t
*ret
= NULL
;
10400 while (block
&& TREE_CODE (block
) == BLOCK
10401 && BLOCK_ABSTRACT_ORIGIN (block
))
10403 tree ao
= BLOCK_ABSTRACT_ORIGIN (block
);
10405 while (TREE_CODE (ao
) == BLOCK
10406 && BLOCK_ABSTRACT_ORIGIN (ao
)
10407 && BLOCK_ABSTRACT_ORIGIN (ao
) != ao
)
10408 ao
= BLOCK_ABSTRACT_ORIGIN (ao
);
10410 if (TREE_CODE (ao
) == FUNCTION_DECL
)
10412 /* If AO is an artificial inline, point RET to the
10413 call site locus at which it has been inlined and continue
10414 the loop, in case AO's caller is also an artificial
10416 if (DECL_DECLARED_INLINE_P (ao
)
10417 && lookup_attribute ("artificial", DECL_ATTRIBUTES (ao
)))
10418 ret
= &BLOCK_SOURCE_LOCATION (block
);
10422 else if (TREE_CODE (ao
) != BLOCK
)
10425 block
= BLOCK_SUPERCONTEXT (block
);
10431 /* If EXP is inlined from an __attribute__((__artificial__))
10432 function, return the location of the original call expression. */
10435 tree_nonartificial_location (tree exp
)
10437 location_t
*loc
= block_nonartificial_location (TREE_BLOCK (exp
));
10442 return EXPR_LOCATION (exp
);
10446 /* These are the hash table functions for the hash table of OPTIMIZATION_NODEq
10449 /* Return the hash code code X, an OPTIMIZATION_NODE or TARGET_OPTION code. */
10452 cl_option_hash_hash (const void *x
)
10454 const_tree
const t
= (const_tree
) x
;
10458 hashval_t hash
= 0;
10460 if (TREE_CODE (t
) == OPTIMIZATION_NODE
)
10462 p
= (const char *)TREE_OPTIMIZATION (t
);
10463 len
= sizeof (struct cl_optimization
);
10466 else if (TREE_CODE (t
) == TARGET_OPTION_NODE
)
10468 p
= (const char *)TREE_TARGET_OPTION (t
);
10469 len
= sizeof (struct cl_target_option
);
10473 gcc_unreachable ();
10475 /* assume most opt flags are just 0/1, some are 2-3, and a few might be
10477 for (i
= 0; i
< len
; i
++)
10479 hash
= (hash
<< 4) ^ ((i
<< 2) | p
[i
]);
10484 /* Return nonzero if the value represented by *X (an OPTIMIZATION or
10485 TARGET_OPTION tree node) is the same as that given by *Y, which is the
10489 cl_option_hash_eq (const void *x
, const void *y
)
10491 const_tree
const xt
= (const_tree
) x
;
10492 const_tree
const yt
= (const_tree
) y
;
10497 if (TREE_CODE (xt
) != TREE_CODE (yt
))
10500 if (TREE_CODE (xt
) == OPTIMIZATION_NODE
)
10502 xp
= (const char *)TREE_OPTIMIZATION (xt
);
10503 yp
= (const char *)TREE_OPTIMIZATION (yt
);
10504 len
= sizeof (struct cl_optimization
);
10507 else if (TREE_CODE (xt
) == TARGET_OPTION_NODE
)
10509 xp
= (const char *)TREE_TARGET_OPTION (xt
);
10510 yp
= (const char *)TREE_TARGET_OPTION (yt
);
10511 len
= sizeof (struct cl_target_option
);
10515 gcc_unreachable ();
10517 return (memcmp (xp
, yp
, len
) == 0);
10520 /* Build an OPTIMIZATION_NODE based on the current options. */
10523 build_optimization_node (void)
10528 /* Use the cache of optimization nodes. */
10530 cl_optimization_save (TREE_OPTIMIZATION (cl_optimization_node
));
10532 slot
= htab_find_slot (cl_option_hash_table
, cl_optimization_node
, INSERT
);
10536 /* Insert this one into the hash table. */
10537 t
= cl_optimization_node
;
10540 /* Make a new node for next time round. */
10541 cl_optimization_node
= make_node (OPTIMIZATION_NODE
);
10547 /* Build a TARGET_OPTION_NODE based on the current options. */
10550 build_target_option_node (void)
10555 /* Use the cache of optimization nodes. */
10557 cl_target_option_save (TREE_TARGET_OPTION (cl_target_option_node
));
10559 slot
= htab_find_slot (cl_option_hash_table
, cl_target_option_node
, INSERT
);
10563 /* Insert this one into the hash table. */
10564 t
= cl_target_option_node
;
10567 /* Make a new node for next time round. */
10568 cl_target_option_node
= make_node (TARGET_OPTION_NODE
);
10574 /* Determine the "ultimate origin" of a block. The block may be an inlined
10575 instance of an inlined instance of a block which is local to an inline
10576 function, so we have to trace all of the way back through the origin chain
10577 to find out what sort of node actually served as the original seed for the
10581 block_ultimate_origin (const_tree block
)
10583 tree immediate_origin
= BLOCK_ABSTRACT_ORIGIN (block
);
10585 /* output_inline_function sets BLOCK_ABSTRACT_ORIGIN for all the
10586 nodes in the function to point to themselves; ignore that if
10587 we're trying to output the abstract instance of this function. */
10588 if (BLOCK_ABSTRACT (block
) && immediate_origin
== block
)
10591 if (immediate_origin
== NULL_TREE
)
10596 tree lookahead
= immediate_origin
;
10600 ret_val
= lookahead
;
10601 lookahead
= (TREE_CODE (ret_val
) == BLOCK
10602 ? BLOCK_ABSTRACT_ORIGIN (ret_val
) : NULL
);
10604 while (lookahead
!= NULL
&& lookahead
!= ret_val
);
10606 /* The block's abstract origin chain may not be the *ultimate* origin of
10607 the block. It could lead to a DECL that has an abstract origin set.
10608 If so, we want that DECL's abstract origin (which is what DECL_ORIGIN
10609 will give us if it has one). Note that DECL's abstract origins are
10610 supposed to be the most distant ancestor (or so decl_ultimate_origin
10611 claims), so we don't need to loop following the DECL origins. */
10612 if (DECL_P (ret_val
))
10613 return DECL_ORIGIN (ret_val
);
10619 /* Return true if T1 and T2 are equivalent lists. */
10622 list_equal_p (const_tree t1
, const_tree t2
)
10624 for (; t1
&& t2
; t1
= TREE_CHAIN (t1
) , t2
= TREE_CHAIN (t2
))
10625 if (TREE_VALUE (t1
) != TREE_VALUE (t2
))
10630 /* Return true iff conversion in EXP generates no instruction. Mark
10631 it inline so that we fully inline into the stripping functions even
10632 though we have two uses of this function. */
10635 tree_nop_conversion (const_tree exp
)
10637 tree outer_type
, inner_type
;
10639 if (!CONVERT_EXPR_P (exp
)
10640 && TREE_CODE (exp
) != NON_LVALUE_EXPR
)
10642 if (TREE_OPERAND (exp
, 0) == error_mark_node
)
10645 outer_type
= TREE_TYPE (exp
);
10646 inner_type
= TREE_TYPE (TREE_OPERAND (exp
, 0));
10648 /* Use precision rather then machine mode when we can, which gives
10649 the correct answer even for submode (bit-field) types. */
10650 if ((INTEGRAL_TYPE_P (outer_type
)
10651 || POINTER_TYPE_P (outer_type
)
10652 || TREE_CODE (outer_type
) == OFFSET_TYPE
)
10653 && (INTEGRAL_TYPE_P (inner_type
)
10654 || POINTER_TYPE_P (inner_type
)
10655 || TREE_CODE (inner_type
) == OFFSET_TYPE
))
10656 return TYPE_PRECISION (outer_type
) == TYPE_PRECISION (inner_type
);
10658 /* Otherwise fall back on comparing machine modes (e.g. for
10659 aggregate types, floats). */
10660 return TYPE_MODE (outer_type
) == TYPE_MODE (inner_type
);
10663 /* Return true iff conversion in EXP generates no instruction. Don't
10664 consider conversions changing the signedness. */
10667 tree_sign_nop_conversion (const_tree exp
)
10669 tree outer_type
, inner_type
;
10671 if (!tree_nop_conversion (exp
))
10674 outer_type
= TREE_TYPE (exp
);
10675 inner_type
= TREE_TYPE (TREE_OPERAND (exp
, 0));
10677 return (TYPE_UNSIGNED (outer_type
) == TYPE_UNSIGNED (inner_type
)
10678 && POINTER_TYPE_P (outer_type
) == POINTER_TYPE_P (inner_type
));
10681 /* Strip conversions from EXP according to tree_nop_conversion and
10682 return the resulting expression. */
10685 tree_strip_nop_conversions (tree exp
)
10687 while (tree_nop_conversion (exp
))
10688 exp
= TREE_OPERAND (exp
, 0);
10692 /* Strip conversions from EXP according to tree_sign_nop_conversion
10693 and return the resulting expression. */
10696 tree_strip_sign_nop_conversions (tree exp
)
10698 while (tree_sign_nop_conversion (exp
))
10699 exp
= TREE_OPERAND (exp
, 0);
10703 static GTY(()) tree gcc_eh_personality_decl
;
10705 /* Return the GCC personality function decl. */
10708 lhd_gcc_personality (void)
10710 if (!gcc_eh_personality_decl
)
10711 gcc_eh_personality_decl
10712 = build_personality_function (USING_SJLJ_EXCEPTIONS
10713 ? "__gcc_personality_sj0"
10714 : "__gcc_personality_v0");
10716 return gcc_eh_personality_decl
;
10719 #include "gt-tree.h"