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
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-iterator.h"
49 #include "basic-block.h"
50 #include "tree-flow.h"
52 #include "pointer-set.h"
53 #include "fixed-value.h"
55 /* Each tree code class has an associated string representation.
56 These must correspond to the tree_code_class entries. */
58 const char *const tree_code_class_strings
[] =
74 /* obstack.[ch] explicitly declined to prototype this. */
75 extern int _obstack_allocated_p (struct obstack
*h
, void *obj
);
77 #ifdef GATHER_STATISTICS
78 /* Statistics-gathering stuff. */
80 int tree_node_counts
[(int) all_kinds
];
81 int tree_node_sizes
[(int) all_kinds
];
83 /* Keep in sync with tree.h:enum tree_node_kind. */
84 static const char * const tree_node_kind_names
[] = {
106 #endif /* GATHER_STATISTICS */
108 /* Unique id for next decl created. */
109 static GTY(()) int next_decl_uid
;
110 /* Unique id for next type created. */
111 static GTY(()) int next_type_uid
= 1;
113 /* Since we cannot rehash a type after it is in the table, we have to
114 keep the hash code. */
116 struct type_hash
GTY(())
122 /* Initial size of the hash table (rounded to next prime). */
123 #define TYPE_HASH_INITIAL_SIZE 1000
125 /* Now here is the hash table. When recording a type, it is added to
126 the slot whose index is the hash code. Note that the hash table is
127 used for several kinds of types (function types, array types and
128 array index range types, for now). While all these live in the
129 same table, they are completely independent, and the hash code is
130 computed differently for each of these. */
132 static GTY ((if_marked ("type_hash_marked_p"), param_is (struct type_hash
)))
133 htab_t type_hash_table
;
135 /* Hash table and temporary node for larger integer const values. */
136 static GTY (()) tree int_cst_node
;
137 static GTY ((if_marked ("ggc_marked_p"), param_is (union tree_node
)))
138 htab_t int_cst_hash_table
;
140 /* General tree->tree mapping structure for use in hash tables. */
143 static GTY ((if_marked ("tree_map_marked_p"), param_is (struct tree_map
)))
144 htab_t debug_expr_for_decl
;
146 static GTY ((if_marked ("tree_map_marked_p"), param_is (struct tree_map
)))
147 htab_t value_expr_for_decl
;
149 static GTY ((if_marked ("tree_priority_map_marked_p"),
150 param_is (struct tree_priority_map
)))
151 htab_t init_priority_for_decl
;
153 static GTY ((if_marked ("tree_map_marked_p"), param_is (struct tree_map
)))
154 htab_t restrict_base_for_decl
;
156 static void set_type_quals (tree
, int);
157 static int type_hash_eq (const void *, const void *);
158 static hashval_t
type_hash_hash (const void *);
159 static hashval_t
int_cst_hash_hash (const void *);
160 static int int_cst_hash_eq (const void *, const void *);
161 static void print_type_hash_statistics (void);
162 static void print_debug_expr_statistics (void);
163 static void print_value_expr_statistics (void);
164 static int type_hash_marked_p (const void *);
165 static unsigned int type_hash_list (const_tree
, hashval_t
);
166 static unsigned int attribute_hash_list (const_tree
, hashval_t
);
168 tree global_trees
[TI_MAX
];
169 tree integer_types
[itk_none
];
171 unsigned char tree_contains_struct
[MAX_TREE_CODES
][64];
173 /* Number of operands for each OpenMP clause. */
174 unsigned const char omp_clause_num_ops
[] =
176 0, /* OMP_CLAUSE_ERROR */
177 1, /* OMP_CLAUSE_PRIVATE */
178 1, /* OMP_CLAUSE_SHARED */
179 1, /* OMP_CLAUSE_FIRSTPRIVATE */
180 1, /* OMP_CLAUSE_LASTPRIVATE */
181 4, /* OMP_CLAUSE_REDUCTION */
182 1, /* OMP_CLAUSE_COPYIN */
183 1, /* OMP_CLAUSE_COPYPRIVATE */
184 1, /* OMP_CLAUSE_IF */
185 1, /* OMP_CLAUSE_NUM_THREADS */
186 1, /* OMP_CLAUSE_SCHEDULE */
187 0, /* OMP_CLAUSE_NOWAIT */
188 0, /* OMP_CLAUSE_ORDERED */
189 0 /* OMP_CLAUSE_DEFAULT */
192 const char * const omp_clause_code_name
[] =
215 /* Initialize the hash table of types. */
216 type_hash_table
= htab_create_ggc (TYPE_HASH_INITIAL_SIZE
, type_hash_hash
,
219 debug_expr_for_decl
= htab_create_ggc (512, tree_map_hash
,
222 value_expr_for_decl
= htab_create_ggc (512, tree_map_hash
,
224 init_priority_for_decl
= htab_create_ggc (512, tree_priority_map_hash
,
225 tree_priority_map_eq
, 0);
226 restrict_base_for_decl
= htab_create_ggc (256, tree_map_hash
,
229 int_cst_hash_table
= htab_create_ggc (1024, int_cst_hash_hash
,
230 int_cst_hash_eq
, NULL
);
232 int_cst_node
= make_node (INTEGER_CST
);
234 tree_contains_struct
[FUNCTION_DECL
][TS_DECL_NON_COMMON
] = 1;
235 tree_contains_struct
[TRANSLATION_UNIT_DECL
][TS_DECL_NON_COMMON
] = 1;
236 tree_contains_struct
[TYPE_DECL
][TS_DECL_NON_COMMON
] = 1;
239 tree_contains_struct
[CONST_DECL
][TS_DECL_COMMON
] = 1;
240 tree_contains_struct
[VAR_DECL
][TS_DECL_COMMON
] = 1;
241 tree_contains_struct
[PARM_DECL
][TS_DECL_COMMON
] = 1;
242 tree_contains_struct
[RESULT_DECL
][TS_DECL_COMMON
] = 1;
243 tree_contains_struct
[FUNCTION_DECL
][TS_DECL_COMMON
] = 1;
244 tree_contains_struct
[TYPE_DECL
][TS_DECL_COMMON
] = 1;
245 tree_contains_struct
[TRANSLATION_UNIT_DECL
][TS_DECL_COMMON
] = 1;
246 tree_contains_struct
[LABEL_DECL
][TS_DECL_COMMON
] = 1;
247 tree_contains_struct
[FIELD_DECL
][TS_DECL_COMMON
] = 1;
250 tree_contains_struct
[CONST_DECL
][TS_DECL_WRTL
] = 1;
251 tree_contains_struct
[VAR_DECL
][TS_DECL_WRTL
] = 1;
252 tree_contains_struct
[PARM_DECL
][TS_DECL_WRTL
] = 1;
253 tree_contains_struct
[RESULT_DECL
][TS_DECL_WRTL
] = 1;
254 tree_contains_struct
[FUNCTION_DECL
][TS_DECL_WRTL
] = 1;
255 tree_contains_struct
[LABEL_DECL
][TS_DECL_WRTL
] = 1;
257 tree_contains_struct
[CONST_DECL
][TS_DECL_MINIMAL
] = 1;
258 tree_contains_struct
[VAR_DECL
][TS_DECL_MINIMAL
] = 1;
259 tree_contains_struct
[PARM_DECL
][TS_DECL_MINIMAL
] = 1;
260 tree_contains_struct
[RESULT_DECL
][TS_DECL_MINIMAL
] = 1;
261 tree_contains_struct
[FUNCTION_DECL
][TS_DECL_MINIMAL
] = 1;
262 tree_contains_struct
[TYPE_DECL
][TS_DECL_MINIMAL
] = 1;
263 tree_contains_struct
[TRANSLATION_UNIT_DECL
][TS_DECL_MINIMAL
] = 1;
264 tree_contains_struct
[LABEL_DECL
][TS_DECL_MINIMAL
] = 1;
265 tree_contains_struct
[FIELD_DECL
][TS_DECL_MINIMAL
] = 1;
266 tree_contains_struct
[STRUCT_FIELD_TAG
][TS_DECL_MINIMAL
] = 1;
267 tree_contains_struct
[NAME_MEMORY_TAG
][TS_DECL_MINIMAL
] = 1;
268 tree_contains_struct
[SYMBOL_MEMORY_TAG
][TS_DECL_MINIMAL
] = 1;
269 tree_contains_struct
[MEMORY_PARTITION_TAG
][TS_DECL_MINIMAL
] = 1;
271 tree_contains_struct
[STRUCT_FIELD_TAG
][TS_MEMORY_TAG
] = 1;
272 tree_contains_struct
[NAME_MEMORY_TAG
][TS_MEMORY_TAG
] = 1;
273 tree_contains_struct
[SYMBOL_MEMORY_TAG
][TS_MEMORY_TAG
] = 1;
274 tree_contains_struct
[MEMORY_PARTITION_TAG
][TS_MEMORY_TAG
] = 1;
276 tree_contains_struct
[STRUCT_FIELD_TAG
][TS_STRUCT_FIELD_TAG
] = 1;
277 tree_contains_struct
[MEMORY_PARTITION_TAG
][TS_MEMORY_PARTITION_TAG
] = 1;
279 tree_contains_struct
[VAR_DECL
][TS_DECL_WITH_VIS
] = 1;
280 tree_contains_struct
[FUNCTION_DECL
][TS_DECL_WITH_VIS
] = 1;
281 tree_contains_struct
[TYPE_DECL
][TS_DECL_WITH_VIS
] = 1;
282 tree_contains_struct
[TRANSLATION_UNIT_DECL
][TS_DECL_WITH_VIS
] = 1;
284 tree_contains_struct
[VAR_DECL
][TS_VAR_DECL
] = 1;
285 tree_contains_struct
[FIELD_DECL
][TS_FIELD_DECL
] = 1;
286 tree_contains_struct
[PARM_DECL
][TS_PARM_DECL
] = 1;
287 tree_contains_struct
[LABEL_DECL
][TS_LABEL_DECL
] = 1;
288 tree_contains_struct
[RESULT_DECL
][TS_RESULT_DECL
] = 1;
289 tree_contains_struct
[CONST_DECL
][TS_CONST_DECL
] = 1;
290 tree_contains_struct
[TYPE_DECL
][TS_TYPE_DECL
] = 1;
291 tree_contains_struct
[FUNCTION_DECL
][TS_FUNCTION_DECL
] = 1;
293 lang_hooks
.init_ts ();
297 /* The name of the object as the assembler will see it (but before any
298 translations made by ASM_OUTPUT_LABELREF). Often this is the same
299 as DECL_NAME. It is an IDENTIFIER_NODE. */
301 decl_assembler_name (tree decl
)
303 if (!DECL_ASSEMBLER_NAME_SET_P (decl
))
304 lang_hooks
.set_decl_assembler_name (decl
);
305 return DECL_WITH_VIS_CHECK (decl
)->decl_with_vis
.assembler_name
;
308 /* Compare ASMNAME with the DECL_ASSEMBLER_NAME of DECL. */
311 decl_assembler_name_equal (tree decl
, tree asmname
)
313 tree decl_asmname
= DECL_ASSEMBLER_NAME (decl
);
315 if (decl_asmname
== asmname
)
318 /* If the target assembler name was set by the user, things are trickier.
319 We have a leading '*' to begin with. After that, it's arguable what
320 is the correct thing to do with -fleading-underscore. Arguably, we've
321 historically been doing the wrong thing in assemble_alias by always
322 printing the leading underscore. Since we're not changing that, make
323 sure user_label_prefix follows the '*' before matching. */
324 if (IDENTIFIER_POINTER (decl_asmname
)[0] == '*')
326 const char *decl_str
= IDENTIFIER_POINTER (decl_asmname
) + 1;
327 size_t ulp_len
= strlen (user_label_prefix
);
331 else if (strncmp (decl_str
, user_label_prefix
, ulp_len
) == 0)
336 return strcmp (decl_str
, IDENTIFIER_POINTER (asmname
)) == 0;
342 /* Compute the number of bytes occupied by a tree with code CODE.
343 This function cannot be used for nodes that have variable sizes,
344 including TREE_VEC, PHI_NODE, STRING_CST, and CALL_EXPR. */
346 tree_code_size (enum tree_code code
)
348 switch (TREE_CODE_CLASS (code
))
350 case tcc_declaration
: /* A decl node */
355 return sizeof (struct tree_field_decl
);
357 return sizeof (struct tree_parm_decl
);
359 return sizeof (struct tree_var_decl
);
361 return sizeof (struct tree_label_decl
);
363 return sizeof (struct tree_result_decl
);
365 return sizeof (struct tree_const_decl
);
367 return sizeof (struct tree_type_decl
);
369 return sizeof (struct tree_function_decl
);
370 case NAME_MEMORY_TAG
:
371 case SYMBOL_MEMORY_TAG
:
372 return sizeof (struct tree_memory_tag
);
373 case STRUCT_FIELD_TAG
:
374 return sizeof (struct tree_struct_field_tag
);
375 case MEMORY_PARTITION_TAG
:
376 return sizeof (struct tree_memory_partition_tag
);
378 return sizeof (struct tree_decl_non_common
);
382 case tcc_type
: /* a type node */
383 return sizeof (struct tree_type
);
385 case tcc_reference
: /* a reference */
386 case tcc_expression
: /* an expression */
387 case tcc_statement
: /* an expression with side effects */
388 case tcc_comparison
: /* a comparison expression */
389 case tcc_unary
: /* a unary arithmetic expression */
390 case tcc_binary
: /* a binary arithmetic expression */
391 return (sizeof (struct tree_exp
)
392 + (TREE_CODE_LENGTH (code
) - 1) * sizeof (tree
));
394 case tcc_gimple_stmt
:
395 return (sizeof (struct gimple_stmt
)
396 + (TREE_CODE_LENGTH (code
) - 1) * sizeof (char *));
398 case tcc_constant
: /* a constant */
401 case INTEGER_CST
: return sizeof (struct tree_int_cst
);
402 case REAL_CST
: return sizeof (struct tree_real_cst
);
403 case FIXED_CST
: return sizeof (struct tree_fixed_cst
);
404 case COMPLEX_CST
: return sizeof (struct tree_complex
);
405 case VECTOR_CST
: return sizeof (struct tree_vector
);
406 case STRING_CST
: gcc_unreachable ();
408 return lang_hooks
.tree_size (code
);
411 case tcc_exceptional
: /* something random, like an identifier. */
414 case IDENTIFIER_NODE
: return lang_hooks
.identifier_size
;
415 case TREE_LIST
: return sizeof (struct tree_list
);
418 case PLACEHOLDER_EXPR
: return sizeof (struct tree_common
);
422 case PHI_NODE
: gcc_unreachable ();
424 case SSA_NAME
: return sizeof (struct tree_ssa_name
);
426 case STATEMENT_LIST
: return sizeof (struct tree_statement_list
);
427 case BLOCK
: return sizeof (struct tree_block
);
428 case VALUE_HANDLE
: return sizeof (struct tree_value_handle
);
429 case CONSTRUCTOR
: return sizeof (struct tree_constructor
);
432 return lang_hooks
.tree_size (code
);
440 /* Compute the number of bytes occupied by NODE. This routine only
441 looks at TREE_CODE, except for those nodes that have variable sizes. */
443 tree_size (const_tree node
)
445 const enum tree_code code
= TREE_CODE (node
);
449 return (sizeof (struct tree_phi_node
)
450 + (PHI_ARG_CAPACITY (node
) - 1) * sizeof (struct phi_arg_d
));
453 return (offsetof (struct tree_binfo
, base_binfos
)
454 + VEC_embedded_size (tree
, BINFO_N_BASE_BINFOS (node
)));
457 return (sizeof (struct tree_vec
)
458 + (TREE_VEC_LENGTH (node
) - 1) * sizeof (tree
));
461 return TREE_STRING_LENGTH (node
) + offsetof (struct tree_string
, str
) + 1;
464 return (sizeof (struct tree_omp_clause
)
465 + (omp_clause_num_ops
[OMP_CLAUSE_CODE (node
)] - 1)
469 if (TREE_CODE_CLASS (code
) == tcc_vl_exp
)
470 return (sizeof (struct tree_exp
)
471 + (VL_EXP_OPERAND_LENGTH (node
) - 1) * sizeof (tree
));
473 return tree_code_size (code
);
477 /* Return a newly allocated node of code CODE. For decl and type
478 nodes, some other fields are initialized. The rest of the node is
479 initialized to zero. This function cannot be used for PHI_NODE,
480 TREE_VEC or OMP_CLAUSE nodes, which is enforced by asserts in
483 Achoo! I got a code in the node. */
486 make_node_stat (enum tree_code code MEM_STAT_DECL
)
489 enum tree_code_class type
= TREE_CODE_CLASS (code
);
490 size_t length
= tree_code_size (code
);
491 #ifdef GATHER_STATISTICS
496 case tcc_declaration
: /* A decl node */
500 case tcc_type
: /* a type node */
504 case tcc_statement
: /* an expression with side effects */
508 case tcc_reference
: /* a reference */
512 case tcc_expression
: /* an expression */
513 case tcc_comparison
: /* a comparison expression */
514 case tcc_unary
: /* a unary arithmetic expression */
515 case tcc_binary
: /* a binary arithmetic expression */
519 case tcc_constant
: /* a constant */
523 case tcc_gimple_stmt
:
524 kind
= gimple_stmt_kind
;
527 case tcc_exceptional
: /* something random, like an identifier. */
530 case IDENTIFIER_NODE
:
547 kind
= ssa_name_kind
;
568 tree_node_counts
[(int) kind
]++;
569 tree_node_sizes
[(int) kind
] += length
;
572 if (code
== IDENTIFIER_NODE
)
573 t
= ggc_alloc_zone_pass_stat (length
, &tree_id_zone
);
575 t
= ggc_alloc_zone_pass_stat (length
, &tree_zone
);
577 memset (t
, 0, length
);
579 TREE_SET_CODE (t
, code
);
584 TREE_SIDE_EFFECTS (t
) = 1;
587 case tcc_declaration
:
588 if (CODE_CONTAINS_STRUCT (code
, TS_DECL_WITH_VIS
))
589 DECL_IN_SYSTEM_HEADER (t
) = in_system_header
;
590 if (CODE_CONTAINS_STRUCT (code
, TS_DECL_COMMON
))
592 if (code
== FUNCTION_DECL
)
594 DECL_ALIGN (t
) = FUNCTION_BOUNDARY
;
595 DECL_MODE (t
) = FUNCTION_MODE
;
599 /* We have not yet computed the alias set for this declaration. */
600 DECL_POINTER_ALIAS_SET (t
) = -1;
602 DECL_SOURCE_LOCATION (t
) = input_location
;
603 DECL_UID (t
) = next_decl_uid
++;
608 TYPE_UID (t
) = next_type_uid
++;
609 TYPE_ALIGN (t
) = BITS_PER_UNIT
;
610 TYPE_USER_ALIGN (t
) = 0;
611 TYPE_MAIN_VARIANT (t
) = t
;
612 TYPE_CANONICAL (t
) = t
;
614 /* Default to no attributes for type, but let target change that. */
615 TYPE_ATTRIBUTES (t
) = NULL_TREE
;
616 targetm
.set_default_type_attributes (t
);
618 /* We have not yet computed the alias set for this type. */
619 TYPE_ALIAS_SET (t
) = -1;
623 TREE_CONSTANT (t
) = 1;
624 TREE_INVARIANT (t
) = 1;
633 case PREDECREMENT_EXPR
:
634 case PREINCREMENT_EXPR
:
635 case POSTDECREMENT_EXPR
:
636 case POSTINCREMENT_EXPR
:
637 /* All of these have side-effects, no matter what their
639 TREE_SIDE_EFFECTS (t
) = 1;
647 case tcc_gimple_stmt
:
650 case GIMPLE_MODIFY_STMT
:
651 TREE_SIDE_EFFECTS (t
) = 1;
659 /* Other classes need no special treatment. */
666 /* Return a new node with the same contents as NODE except that its
667 TREE_CHAIN is zero and it has a fresh uid. */
670 copy_node_stat (tree node MEM_STAT_DECL
)
673 enum tree_code code
= TREE_CODE (node
);
676 gcc_assert (code
!= STATEMENT_LIST
);
678 length
= tree_size (node
);
679 t
= ggc_alloc_zone_pass_stat (length
, &tree_zone
);
680 memcpy (t
, node
, length
);
682 if (!GIMPLE_TUPLE_P (node
))
684 TREE_ASM_WRITTEN (t
) = 0;
685 TREE_VISITED (t
) = 0;
688 if (TREE_CODE_CLASS (code
) == tcc_declaration
)
690 DECL_UID (t
) = next_decl_uid
++;
691 if ((TREE_CODE (node
) == PARM_DECL
|| TREE_CODE (node
) == VAR_DECL
)
692 && DECL_HAS_VALUE_EXPR_P (node
))
694 SET_DECL_VALUE_EXPR (t
, DECL_VALUE_EXPR (node
));
695 DECL_HAS_VALUE_EXPR_P (t
) = 1;
697 if (TREE_CODE (node
) == VAR_DECL
&& DECL_HAS_INIT_PRIORITY_P (node
))
699 SET_DECL_INIT_PRIORITY (t
, DECL_INIT_PRIORITY (node
));
700 DECL_HAS_INIT_PRIORITY_P (t
) = 1;
702 if (TREE_CODE (node
) == VAR_DECL
&& DECL_BASED_ON_RESTRICT_P (node
))
704 SET_DECL_RESTRICT_BASE (t
, DECL_GET_RESTRICT_BASE (node
));
705 DECL_BASED_ON_RESTRICT_P (t
) = 1;
708 else if (TREE_CODE_CLASS (code
) == tcc_type
)
710 TYPE_UID (t
) = next_type_uid
++;
711 /* The following is so that the debug code for
712 the copy is different from the original type.
713 The two statements usually duplicate each other
714 (because they clear fields of the same union),
715 but the optimizer should catch that. */
716 TYPE_SYMTAB_POINTER (t
) = 0;
717 TYPE_SYMTAB_ADDRESS (t
) = 0;
719 /* Do not copy the values cache. */
720 if (TYPE_CACHED_VALUES_P(t
))
722 TYPE_CACHED_VALUES_P (t
) = 0;
723 TYPE_CACHED_VALUES (t
) = NULL_TREE
;
730 /* Return a copy of a chain of nodes, chained through the TREE_CHAIN field.
731 For example, this can copy a list made of TREE_LIST nodes. */
734 copy_list (tree list
)
742 head
= prev
= copy_node (list
);
743 next
= TREE_CHAIN (list
);
746 TREE_CHAIN (prev
) = copy_node (next
);
747 prev
= TREE_CHAIN (prev
);
748 next
= TREE_CHAIN (next
);
754 /* Create an INT_CST node with a LOW value sign extended. */
757 build_int_cst (tree type
, HOST_WIDE_INT low
)
759 /* Support legacy code. */
761 type
= integer_type_node
;
763 return build_int_cst_wide (type
, low
, low
< 0 ? -1 : 0);
766 /* Create an INT_CST node with a LOW value zero extended. */
769 build_int_cstu (tree type
, unsigned HOST_WIDE_INT low
)
771 return build_int_cst_wide (type
, low
, 0);
774 /* Create an INT_CST node with a LOW value in TYPE. The value is sign extended
775 if it is negative. This function is similar to build_int_cst, but
776 the extra bits outside of the type precision are cleared. Constants
777 with these extra bits may confuse the fold so that it detects overflows
778 even in cases when they do not occur, and in general should be avoided.
779 We cannot however make this a default behavior of build_int_cst without
780 more intrusive changes, since there are parts of gcc that rely on the extra
781 precision of the integer constants. */
784 build_int_cst_type (tree type
, HOST_WIDE_INT low
)
786 unsigned HOST_WIDE_INT low1
;
791 fit_double_type (low
, low
< 0 ? -1 : 0, &low1
, &hi
, type
);
793 return build_int_cst_wide (type
, low1
, hi
);
796 /* Create an INT_CST node of TYPE and value HI:LOW. The value is truncated
797 and sign extended according to the value range of TYPE. */
800 build_int_cst_wide_type (tree type
,
801 unsigned HOST_WIDE_INT low
, HOST_WIDE_INT high
)
803 fit_double_type (low
, high
, &low
, &high
, type
);
804 return build_int_cst_wide (type
, low
, high
);
807 /* These are the hash table functions for the hash table of INTEGER_CST
808 nodes of a sizetype. */
810 /* Return the hash code code X, an INTEGER_CST. */
813 int_cst_hash_hash (const void *x
)
815 const_tree
const t
= (const_tree
) x
;
817 return (TREE_INT_CST_HIGH (t
) ^ TREE_INT_CST_LOW (t
)
818 ^ htab_hash_pointer (TREE_TYPE (t
)));
821 /* Return nonzero if the value represented by *X (an INTEGER_CST tree node)
822 is the same as that given by *Y, which is the same. */
825 int_cst_hash_eq (const void *x
, const void *y
)
827 const_tree
const xt
= (const_tree
) x
;
828 const_tree
const yt
= (const_tree
) y
;
830 return (TREE_TYPE (xt
) == TREE_TYPE (yt
)
831 && TREE_INT_CST_HIGH (xt
) == TREE_INT_CST_HIGH (yt
)
832 && TREE_INT_CST_LOW (xt
) == TREE_INT_CST_LOW (yt
));
835 /* Create an INT_CST node of TYPE and value HI:LOW.
836 The returned node is always shared. For small integers we use a
837 per-type vector cache, for larger ones we use a single hash table. */
840 build_int_cst_wide (tree type
, unsigned HOST_WIDE_INT low
, HOST_WIDE_INT hi
)
848 switch (TREE_CODE (type
))
852 /* Cache NULL pointer. */
861 /* Cache false or true. */
869 if (TYPE_UNSIGNED (type
))
872 limit
= INTEGER_SHARE_LIMIT
;
873 if (!hi
&& low
< (unsigned HOST_WIDE_INT
)INTEGER_SHARE_LIMIT
)
879 limit
= INTEGER_SHARE_LIMIT
+ 1;
880 if (!hi
&& low
< (unsigned HOST_WIDE_INT
)INTEGER_SHARE_LIMIT
)
882 else if (hi
== -1 && low
== -(unsigned HOST_WIDE_INT
)1)
896 /* Look for it in the type's vector of small shared ints. */
897 if (!TYPE_CACHED_VALUES_P (type
))
899 TYPE_CACHED_VALUES_P (type
) = 1;
900 TYPE_CACHED_VALUES (type
) = make_tree_vec (limit
);
903 t
= TREE_VEC_ELT (TYPE_CACHED_VALUES (type
), ix
);
906 /* Make sure no one is clobbering the shared constant. */
907 gcc_assert (TREE_TYPE (t
) == type
);
908 gcc_assert (TREE_INT_CST_LOW (t
) == low
);
909 gcc_assert (TREE_INT_CST_HIGH (t
) == hi
);
913 /* Create a new shared int. */
914 t
= make_node (INTEGER_CST
);
916 TREE_INT_CST_LOW (t
) = low
;
917 TREE_INT_CST_HIGH (t
) = hi
;
918 TREE_TYPE (t
) = type
;
920 TREE_VEC_ELT (TYPE_CACHED_VALUES (type
), ix
) = t
;
925 /* Use the cache of larger shared ints. */
928 TREE_INT_CST_LOW (int_cst_node
) = low
;
929 TREE_INT_CST_HIGH (int_cst_node
) = hi
;
930 TREE_TYPE (int_cst_node
) = type
;
932 slot
= htab_find_slot (int_cst_hash_table
, int_cst_node
, INSERT
);
936 /* Insert this one into the hash table. */
939 /* Make a new node for next time round. */
940 int_cst_node
= make_node (INTEGER_CST
);
947 /* Builds an integer constant in TYPE such that lowest BITS bits are ones
948 and the rest are zeros. */
951 build_low_bits_mask (tree type
, unsigned bits
)
953 unsigned HOST_WIDE_INT low
;
955 unsigned HOST_WIDE_INT all_ones
= ~(unsigned HOST_WIDE_INT
) 0;
957 gcc_assert (bits
<= TYPE_PRECISION (type
));
959 if (bits
== TYPE_PRECISION (type
)
960 && !TYPE_UNSIGNED (type
))
962 /* Sign extended all-ones mask. */
966 else if (bits
<= HOST_BITS_PER_WIDE_INT
)
968 low
= all_ones
>> (HOST_BITS_PER_WIDE_INT
- bits
);
973 bits
-= HOST_BITS_PER_WIDE_INT
;
975 high
= all_ones
>> (HOST_BITS_PER_WIDE_INT
- bits
);
978 return build_int_cst_wide (type
, low
, high
);
981 /* Checks that X is integer constant that can be expressed in (unsigned)
982 HOST_WIDE_INT without loss of precision. */
985 cst_and_fits_in_hwi (const_tree x
)
987 if (TREE_CODE (x
) != INTEGER_CST
)
990 if (TYPE_PRECISION (TREE_TYPE (x
)) > HOST_BITS_PER_WIDE_INT
)
993 return (TREE_INT_CST_HIGH (x
) == 0
994 || TREE_INT_CST_HIGH (x
) == -1);
997 /* Return a new VECTOR_CST node whose type is TYPE and whose values
998 are in a list pointed to by VALS. */
1001 build_vector (tree type
, tree vals
)
1003 tree v
= make_node (VECTOR_CST
);
1007 TREE_VECTOR_CST_ELTS (v
) = vals
;
1008 TREE_TYPE (v
) = type
;
1010 /* Iterate through elements and check for overflow. */
1011 for (link
= vals
; link
; link
= TREE_CHAIN (link
))
1013 tree value
= TREE_VALUE (link
);
1015 /* Don't crash if we get an address constant. */
1016 if (!CONSTANT_CLASS_P (value
))
1019 over
|= TREE_OVERFLOW (value
);
1022 TREE_OVERFLOW (v
) = over
;
1026 /* Return a new VECTOR_CST node whose type is TYPE and whose values
1027 are extracted from V, a vector of CONSTRUCTOR_ELT. */
1030 build_vector_from_ctor (tree type
, VEC(constructor_elt
,gc
) *v
)
1032 tree list
= NULL_TREE
;
1033 unsigned HOST_WIDE_INT idx
;
1036 FOR_EACH_CONSTRUCTOR_VALUE (v
, idx
, value
)
1037 list
= tree_cons (NULL_TREE
, value
, list
);
1038 return build_vector (type
, nreverse (list
));
1041 /* Return a new CONSTRUCTOR node whose type is TYPE and whose values
1042 are in the VEC pointed to by VALS. */
1044 build_constructor (tree type
, VEC(constructor_elt
,gc
) *vals
)
1046 tree c
= make_node (CONSTRUCTOR
);
1047 TREE_TYPE (c
) = type
;
1048 CONSTRUCTOR_ELTS (c
) = vals
;
1052 /* Build a CONSTRUCTOR node made of a single initializer, with the specified
1055 build_constructor_single (tree type
, tree index
, tree value
)
1057 VEC(constructor_elt
,gc
) *v
;
1058 constructor_elt
*elt
;
1061 v
= VEC_alloc (constructor_elt
, gc
, 1);
1062 elt
= VEC_quick_push (constructor_elt
, v
, NULL
);
1066 t
= build_constructor (type
, v
);
1067 TREE_CONSTANT (t
) = TREE_CONSTANT (value
);
1072 /* Return a new CONSTRUCTOR node whose type is TYPE and whose values
1073 are in a list pointed to by VALS. */
1075 build_constructor_from_list (tree type
, tree vals
)
1078 VEC(constructor_elt
,gc
) *v
= NULL
;
1079 bool constant_p
= true;
1083 v
= VEC_alloc (constructor_elt
, gc
, list_length (vals
));
1084 for (t
= vals
; t
; t
= TREE_CHAIN (t
))
1086 constructor_elt
*elt
= VEC_quick_push (constructor_elt
, v
, NULL
);
1087 val
= TREE_VALUE (t
);
1088 elt
->index
= TREE_PURPOSE (t
);
1090 if (!TREE_CONSTANT (val
))
1095 t
= build_constructor (type
, v
);
1096 TREE_CONSTANT (t
) = constant_p
;
1100 /* Return a new FIXED_CST node whose type is TYPE and value is F. */
1103 build_fixed (tree type
, FIXED_VALUE_TYPE f
)
1106 FIXED_VALUE_TYPE
*fp
;
1108 v
= make_node (FIXED_CST
);
1109 fp
= ggc_alloc (sizeof (FIXED_VALUE_TYPE
));
1110 memcpy (fp
, &f
, sizeof (FIXED_VALUE_TYPE
));
1112 TREE_TYPE (v
) = type
;
1113 TREE_FIXED_CST_PTR (v
) = fp
;
1117 /* Return a new REAL_CST node whose type is TYPE and value is D. */
1120 build_real (tree type
, REAL_VALUE_TYPE d
)
1123 REAL_VALUE_TYPE
*dp
;
1126 /* ??? Used to check for overflow here via CHECK_FLOAT_TYPE.
1127 Consider doing it via real_convert now. */
1129 v
= make_node (REAL_CST
);
1130 dp
= ggc_alloc (sizeof (REAL_VALUE_TYPE
));
1131 memcpy (dp
, &d
, sizeof (REAL_VALUE_TYPE
));
1133 TREE_TYPE (v
) = type
;
1134 TREE_REAL_CST_PTR (v
) = dp
;
1135 TREE_OVERFLOW (v
) = overflow
;
1139 /* Return a new REAL_CST node whose type is TYPE
1140 and whose value is the integer value of the INTEGER_CST node I. */
1143 real_value_from_int_cst (const_tree type
, const_tree i
)
1147 /* Clear all bits of the real value type so that we can later do
1148 bitwise comparisons to see if two values are the same. */
1149 memset (&d
, 0, sizeof d
);
1151 real_from_integer (&d
, type
? TYPE_MODE (type
) : VOIDmode
,
1152 TREE_INT_CST_LOW (i
), TREE_INT_CST_HIGH (i
),
1153 TYPE_UNSIGNED (TREE_TYPE (i
)));
1157 /* Given a tree representing an integer constant I, return a tree
1158 representing the same value as a floating-point constant of type TYPE. */
1161 build_real_from_int_cst (tree type
, const_tree i
)
1164 int overflow
= TREE_OVERFLOW (i
);
1166 v
= build_real (type
, real_value_from_int_cst (type
, i
));
1168 TREE_OVERFLOW (v
) |= overflow
;
1172 /* Return a newly constructed STRING_CST node whose value is
1173 the LEN characters at STR.
1174 The TREE_TYPE is not initialized. */
1177 build_string (int len
, const char *str
)
1182 /* Do not waste bytes provided by padding of struct tree_string. */
1183 length
= len
+ offsetof (struct tree_string
, str
) + 1;
1185 #ifdef GATHER_STATISTICS
1186 tree_node_counts
[(int) c_kind
]++;
1187 tree_node_sizes
[(int) c_kind
] += length
;
1190 s
= ggc_alloc_tree (length
);
1192 memset (s
, 0, sizeof (struct tree_common
));
1193 TREE_SET_CODE (s
, STRING_CST
);
1194 TREE_CONSTANT (s
) = 1;
1195 TREE_INVARIANT (s
) = 1;
1196 TREE_STRING_LENGTH (s
) = len
;
1197 memcpy (CONST_CAST (TREE_STRING_POINTER (s
)), str
, len
);
1198 ((char *) CONST_CAST (TREE_STRING_POINTER (s
)))[len
] = '\0';
1203 /* Return a newly constructed COMPLEX_CST node whose value is
1204 specified by the real and imaginary parts REAL and IMAG.
1205 Both REAL and IMAG should be constant nodes. TYPE, if specified,
1206 will be the type of the COMPLEX_CST; otherwise a new type will be made. */
1209 build_complex (tree type
, tree real
, tree imag
)
1211 tree t
= make_node (COMPLEX_CST
);
1213 TREE_REALPART (t
) = real
;
1214 TREE_IMAGPART (t
) = imag
;
1215 TREE_TYPE (t
) = type
? type
: build_complex_type (TREE_TYPE (real
));
1216 TREE_OVERFLOW (t
) = TREE_OVERFLOW (real
) | TREE_OVERFLOW (imag
);
1220 /* Return a constant of arithmetic type TYPE which is the
1221 multiplicative identity of the set TYPE. */
1224 build_one_cst (tree type
)
1226 switch (TREE_CODE (type
))
1228 case INTEGER_TYPE
: case ENUMERAL_TYPE
: case BOOLEAN_TYPE
:
1229 case POINTER_TYPE
: case REFERENCE_TYPE
:
1231 return build_int_cst (type
, 1);
1234 return build_real (type
, dconst1
);
1236 case FIXED_POINT_TYPE
:
1237 /* We can only generate 1 for accum types. */
1238 gcc_assert (ALL_SCALAR_ACCUM_MODE_P (TYPE_MODE (type
)));
1239 return build_fixed (type
, FCONST1(TYPE_MODE (type
)));
1246 scalar
= build_one_cst (TREE_TYPE (type
));
1248 /* Create 'vect_cst_ = {cst,cst,...,cst}' */
1250 for (i
= TYPE_VECTOR_SUBPARTS (type
); --i
>= 0; )
1251 cst
= tree_cons (NULL_TREE
, scalar
, cst
);
1253 return build_vector (type
, cst
);
1257 return build_complex (type
,
1258 build_one_cst (TREE_TYPE (type
)),
1259 fold_convert (TREE_TYPE (type
), integer_zero_node
));
1266 /* Build a BINFO with LEN language slots. */
1269 make_tree_binfo_stat (unsigned base_binfos MEM_STAT_DECL
)
1272 size_t length
= (offsetof (struct tree_binfo
, base_binfos
)
1273 + VEC_embedded_size (tree
, base_binfos
));
1275 #ifdef GATHER_STATISTICS
1276 tree_node_counts
[(int) binfo_kind
]++;
1277 tree_node_sizes
[(int) binfo_kind
] += length
;
1280 t
= ggc_alloc_zone_pass_stat (length
, &tree_zone
);
1282 memset (t
, 0, offsetof (struct tree_binfo
, base_binfos
));
1284 TREE_SET_CODE (t
, TREE_BINFO
);
1286 VEC_embedded_init (tree
, BINFO_BASE_BINFOS (t
), base_binfos
);
1292 /* Build a newly constructed TREE_VEC node of length LEN. */
1295 make_tree_vec_stat (int len MEM_STAT_DECL
)
1298 int length
= (len
- 1) * sizeof (tree
) + sizeof (struct tree_vec
);
1300 #ifdef GATHER_STATISTICS
1301 tree_node_counts
[(int) vec_kind
]++;
1302 tree_node_sizes
[(int) vec_kind
] += length
;
1305 t
= ggc_alloc_zone_pass_stat (length
, &tree_zone
);
1307 memset (t
, 0, length
);
1309 TREE_SET_CODE (t
, TREE_VEC
);
1310 TREE_VEC_LENGTH (t
) = len
;
1315 /* Return 1 if EXPR is the integer constant zero or a complex constant
1319 integer_zerop (const_tree expr
)
1323 return ((TREE_CODE (expr
) == INTEGER_CST
1324 && TREE_INT_CST_LOW (expr
) == 0
1325 && TREE_INT_CST_HIGH (expr
) == 0)
1326 || (TREE_CODE (expr
) == COMPLEX_CST
1327 && integer_zerop (TREE_REALPART (expr
))
1328 && integer_zerop (TREE_IMAGPART (expr
))));
1331 /* Return 1 if EXPR is the integer constant one or the corresponding
1332 complex constant. */
1335 integer_onep (const_tree expr
)
1339 return ((TREE_CODE (expr
) == INTEGER_CST
1340 && TREE_INT_CST_LOW (expr
) == 1
1341 && TREE_INT_CST_HIGH (expr
) == 0)
1342 || (TREE_CODE (expr
) == COMPLEX_CST
1343 && integer_onep (TREE_REALPART (expr
))
1344 && integer_zerop (TREE_IMAGPART (expr
))));
1347 /* Return 1 if EXPR is an integer containing all 1's in as much precision as
1348 it contains. Likewise for the corresponding complex constant. */
1351 integer_all_onesp (const_tree expr
)
1358 if (TREE_CODE (expr
) == COMPLEX_CST
1359 && integer_all_onesp (TREE_REALPART (expr
))
1360 && integer_zerop (TREE_IMAGPART (expr
)))
1363 else if (TREE_CODE (expr
) != INTEGER_CST
)
1366 uns
= TYPE_UNSIGNED (TREE_TYPE (expr
));
1367 if (TREE_INT_CST_LOW (expr
) == ~(unsigned HOST_WIDE_INT
) 0
1368 && TREE_INT_CST_HIGH (expr
) == -1)
1373 /* Note that using TYPE_PRECISION here is wrong. We care about the
1374 actual bits, not the (arbitrary) range of the type. */
1375 prec
= GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (expr
)));
1376 if (prec
>= HOST_BITS_PER_WIDE_INT
)
1378 HOST_WIDE_INT high_value
;
1381 shift_amount
= prec
- HOST_BITS_PER_WIDE_INT
;
1383 /* Can not handle precisions greater than twice the host int size. */
1384 gcc_assert (shift_amount
<= HOST_BITS_PER_WIDE_INT
);
1385 if (shift_amount
== HOST_BITS_PER_WIDE_INT
)
1386 /* Shifting by the host word size is undefined according to the ANSI
1387 standard, so we must handle this as a special case. */
1390 high_value
= ((HOST_WIDE_INT
) 1 << shift_amount
) - 1;
1392 return (TREE_INT_CST_LOW (expr
) == ~(unsigned HOST_WIDE_INT
) 0
1393 && TREE_INT_CST_HIGH (expr
) == high_value
);
1396 return TREE_INT_CST_LOW (expr
) == ((unsigned HOST_WIDE_INT
) 1 << prec
) - 1;
1399 /* Return 1 if EXPR is an integer constant that is a power of 2 (i.e., has only
1403 integer_pow2p (const_tree expr
)
1406 HOST_WIDE_INT high
, low
;
1410 if (TREE_CODE (expr
) == COMPLEX_CST
1411 && integer_pow2p (TREE_REALPART (expr
))
1412 && integer_zerop (TREE_IMAGPART (expr
)))
1415 if (TREE_CODE (expr
) != INTEGER_CST
)
1418 prec
= (POINTER_TYPE_P (TREE_TYPE (expr
))
1419 ? POINTER_SIZE
: TYPE_PRECISION (TREE_TYPE (expr
)));
1420 high
= TREE_INT_CST_HIGH (expr
);
1421 low
= TREE_INT_CST_LOW (expr
);
1423 /* First clear all bits that are beyond the type's precision in case
1424 we've been sign extended. */
1426 if (prec
== 2 * HOST_BITS_PER_WIDE_INT
)
1428 else if (prec
> HOST_BITS_PER_WIDE_INT
)
1429 high
&= ~((HOST_WIDE_INT
) (-1) << (prec
- HOST_BITS_PER_WIDE_INT
));
1433 if (prec
< HOST_BITS_PER_WIDE_INT
)
1434 low
&= ~((HOST_WIDE_INT
) (-1) << prec
);
1437 if (high
== 0 && low
== 0)
1440 return ((high
== 0 && (low
& (low
- 1)) == 0)
1441 || (low
== 0 && (high
& (high
- 1)) == 0));
1444 /* Return 1 if EXPR is an integer constant other than zero or a
1445 complex constant other than zero. */
1448 integer_nonzerop (const_tree expr
)
1452 return ((TREE_CODE (expr
) == INTEGER_CST
1453 && (TREE_INT_CST_LOW (expr
) != 0
1454 || TREE_INT_CST_HIGH (expr
) != 0))
1455 || (TREE_CODE (expr
) == COMPLEX_CST
1456 && (integer_nonzerop (TREE_REALPART (expr
))
1457 || integer_nonzerop (TREE_IMAGPART (expr
)))));
1460 /* Return 1 if EXPR is the fixed-point constant zero. */
1463 fixed_zerop (const_tree expr
)
1465 return (TREE_CODE (expr
) == FIXED_CST
1466 && double_int_zero_p (TREE_FIXED_CST (expr
).data
));
1469 /* Return the power of two represented by a tree node known to be a
1473 tree_log2 (const_tree expr
)
1476 HOST_WIDE_INT high
, low
;
1480 if (TREE_CODE (expr
) == COMPLEX_CST
)
1481 return tree_log2 (TREE_REALPART (expr
));
1483 prec
= (POINTER_TYPE_P (TREE_TYPE (expr
))
1484 ? POINTER_SIZE
: TYPE_PRECISION (TREE_TYPE (expr
)));
1486 high
= TREE_INT_CST_HIGH (expr
);
1487 low
= TREE_INT_CST_LOW (expr
);
1489 /* First clear all bits that are beyond the type's precision in case
1490 we've been sign extended. */
1492 if (prec
== 2 * HOST_BITS_PER_WIDE_INT
)
1494 else if (prec
> HOST_BITS_PER_WIDE_INT
)
1495 high
&= ~((HOST_WIDE_INT
) (-1) << (prec
- HOST_BITS_PER_WIDE_INT
));
1499 if (prec
< HOST_BITS_PER_WIDE_INT
)
1500 low
&= ~((HOST_WIDE_INT
) (-1) << prec
);
1503 return (high
!= 0 ? HOST_BITS_PER_WIDE_INT
+ exact_log2 (high
)
1504 : exact_log2 (low
));
1507 /* Similar, but return the largest integer Y such that 2 ** Y is less
1508 than or equal to EXPR. */
1511 tree_floor_log2 (const_tree expr
)
1514 HOST_WIDE_INT high
, low
;
1518 if (TREE_CODE (expr
) == COMPLEX_CST
)
1519 return tree_log2 (TREE_REALPART (expr
));
1521 prec
= (POINTER_TYPE_P (TREE_TYPE (expr
))
1522 ? POINTER_SIZE
: TYPE_PRECISION (TREE_TYPE (expr
)));
1524 high
= TREE_INT_CST_HIGH (expr
);
1525 low
= TREE_INT_CST_LOW (expr
);
1527 /* First clear all bits that are beyond the type's precision in case
1528 we've been sign extended. Ignore if type's precision hasn't been set
1529 since what we are doing is setting it. */
1531 if (prec
== 2 * HOST_BITS_PER_WIDE_INT
|| prec
== 0)
1533 else if (prec
> HOST_BITS_PER_WIDE_INT
)
1534 high
&= ~((HOST_WIDE_INT
) (-1) << (prec
- HOST_BITS_PER_WIDE_INT
));
1538 if (prec
< HOST_BITS_PER_WIDE_INT
)
1539 low
&= ~((HOST_WIDE_INT
) (-1) << prec
);
1542 return (high
!= 0 ? HOST_BITS_PER_WIDE_INT
+ floor_log2 (high
)
1543 : floor_log2 (low
));
1546 /* Return 1 if EXPR is the real constant zero. */
1549 real_zerop (const_tree expr
)
1553 return ((TREE_CODE (expr
) == REAL_CST
1554 && REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconst0
))
1555 || (TREE_CODE (expr
) == COMPLEX_CST
1556 && real_zerop (TREE_REALPART (expr
))
1557 && real_zerop (TREE_IMAGPART (expr
))));
1560 /* Return 1 if EXPR is the real constant one in real or complex form. */
1563 real_onep (const_tree expr
)
1567 return ((TREE_CODE (expr
) == REAL_CST
1568 && REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconst1
))
1569 || (TREE_CODE (expr
) == COMPLEX_CST
1570 && real_onep (TREE_REALPART (expr
))
1571 && real_zerop (TREE_IMAGPART (expr
))));
1574 /* Return 1 if EXPR is the real constant two. */
1577 real_twop (const_tree expr
)
1581 return ((TREE_CODE (expr
) == REAL_CST
1582 && REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconst2
))
1583 || (TREE_CODE (expr
) == COMPLEX_CST
1584 && real_twop (TREE_REALPART (expr
))
1585 && real_zerop (TREE_IMAGPART (expr
))));
1588 /* Return 1 if EXPR is the real constant minus one. */
1591 real_minus_onep (const_tree expr
)
1595 return ((TREE_CODE (expr
) == REAL_CST
1596 && REAL_VALUES_EQUAL (TREE_REAL_CST (expr
), dconstm1
))
1597 || (TREE_CODE (expr
) == COMPLEX_CST
1598 && real_minus_onep (TREE_REALPART (expr
))
1599 && real_zerop (TREE_IMAGPART (expr
))));
1602 /* Nonzero if EXP is a constant or a cast of a constant. */
1605 really_constant_p (const_tree exp
)
1607 /* This is not quite the same as STRIP_NOPS. It does more. */
1608 while (TREE_CODE (exp
) == NOP_EXPR
1609 || TREE_CODE (exp
) == CONVERT_EXPR
1610 || TREE_CODE (exp
) == NON_LVALUE_EXPR
)
1611 exp
= TREE_OPERAND (exp
, 0);
1612 return TREE_CONSTANT (exp
);
1615 /* Return first list element whose TREE_VALUE is ELEM.
1616 Return 0 if ELEM is not in LIST. */
1619 value_member (tree elem
, tree list
)
1623 if (elem
== TREE_VALUE (list
))
1625 list
= TREE_CHAIN (list
);
1630 /* Return first list element whose TREE_PURPOSE is ELEM.
1631 Return 0 if ELEM is not in LIST. */
1634 purpose_member (const_tree elem
, tree list
)
1638 if (elem
== TREE_PURPOSE (list
))
1640 list
= TREE_CHAIN (list
);
1645 /* Return nonzero if ELEM is part of the chain CHAIN. */
1648 chain_member (const_tree elem
, const_tree chain
)
1654 chain
= TREE_CHAIN (chain
);
1660 /* Return the length of a chain of nodes chained through TREE_CHAIN.
1661 We expect a null pointer to mark the end of the chain.
1662 This is the Lisp primitive `length'. */
1665 list_length (const_tree t
)
1668 #ifdef ENABLE_TREE_CHECKING
1676 #ifdef ENABLE_TREE_CHECKING
1679 gcc_assert (p
!= q
);
1687 /* Returns the number of FIELD_DECLs in TYPE. */
1690 fields_length (const_tree type
)
1692 tree t
= TYPE_FIELDS (type
);
1695 for (; t
; t
= TREE_CHAIN (t
))
1696 if (TREE_CODE (t
) == FIELD_DECL
)
1702 /* Concatenate two chains of nodes (chained through TREE_CHAIN)
1703 by modifying the last node in chain 1 to point to chain 2.
1704 This is the Lisp primitive `nconc'. */
1707 chainon (tree op1
, tree op2
)
1716 for (t1
= op1
; TREE_CHAIN (t1
); t1
= TREE_CHAIN (t1
))
1718 TREE_CHAIN (t1
) = op2
;
1720 #ifdef ENABLE_TREE_CHECKING
1723 for (t2
= op2
; t2
; t2
= TREE_CHAIN (t2
))
1724 gcc_assert (t2
!= t1
);
1731 /* Return the last node in a chain of nodes (chained through TREE_CHAIN). */
1734 tree_last (tree chain
)
1738 while ((next
= TREE_CHAIN (chain
)))
1743 /* Reverse the order of elements in the chain T,
1744 and return the new head of the chain (old last element). */
1749 tree prev
= 0, decl
, next
;
1750 for (decl
= t
; decl
; decl
= next
)
1752 next
= TREE_CHAIN (decl
);
1753 TREE_CHAIN (decl
) = prev
;
1759 /* Return a newly created TREE_LIST node whose
1760 purpose and value fields are PARM and VALUE. */
1763 build_tree_list_stat (tree parm
, tree value MEM_STAT_DECL
)
1765 tree t
= make_node_stat (TREE_LIST PASS_MEM_STAT
);
1766 TREE_PURPOSE (t
) = parm
;
1767 TREE_VALUE (t
) = value
;
1771 /* Return a newly created TREE_LIST node whose
1772 purpose and value fields are PURPOSE and VALUE
1773 and whose TREE_CHAIN is CHAIN. */
1776 tree_cons_stat (tree purpose
, tree value
, tree chain MEM_STAT_DECL
)
1780 node
= ggc_alloc_zone_pass_stat (sizeof (struct tree_list
), &tree_zone
);
1782 memset (node
, 0, sizeof (struct tree_common
));
1784 #ifdef GATHER_STATISTICS
1785 tree_node_counts
[(int) x_kind
]++;
1786 tree_node_sizes
[(int) x_kind
] += sizeof (struct tree_list
);
1789 TREE_SET_CODE (node
, TREE_LIST
);
1790 TREE_CHAIN (node
) = chain
;
1791 TREE_PURPOSE (node
) = purpose
;
1792 TREE_VALUE (node
) = value
;
1797 /* Return the size nominally occupied by an object of type TYPE
1798 when it resides in memory. The value is measured in units of bytes,
1799 and its data type is that normally used for type sizes
1800 (which is the first type created by make_signed_type or
1801 make_unsigned_type). */
1804 size_in_bytes (const_tree type
)
1808 if (type
== error_mark_node
)
1809 return integer_zero_node
;
1811 type
= TYPE_MAIN_VARIANT (type
);
1812 t
= TYPE_SIZE_UNIT (type
);
1816 lang_hooks
.types
.incomplete_type_error (NULL_TREE
, type
);
1817 return size_zero_node
;
1823 /* Return the size of TYPE (in bytes) as a wide integer
1824 or return -1 if the size can vary or is larger than an integer. */
1827 int_size_in_bytes (const_tree type
)
1831 if (type
== error_mark_node
)
1834 type
= TYPE_MAIN_VARIANT (type
);
1835 t
= TYPE_SIZE_UNIT (type
);
1837 || TREE_CODE (t
) != INTEGER_CST
1838 || TREE_INT_CST_HIGH (t
) != 0
1839 /* If the result would appear negative, it's too big to represent. */
1840 || (HOST_WIDE_INT
) TREE_INT_CST_LOW (t
) < 0)
1843 return TREE_INT_CST_LOW (t
);
1846 /* Return the maximum size of TYPE (in bytes) as a wide integer
1847 or return -1 if the size can vary or is larger than an integer. */
1850 max_int_size_in_bytes (const_tree type
)
1852 HOST_WIDE_INT size
= -1;
1855 /* If this is an array type, check for a possible MAX_SIZE attached. */
1857 if (TREE_CODE (type
) == ARRAY_TYPE
)
1859 size_tree
= TYPE_ARRAY_MAX_SIZE (type
);
1861 if (size_tree
&& host_integerp (size_tree
, 1))
1862 size
= tree_low_cst (size_tree
, 1);
1865 /* If we still haven't been able to get a size, see if the language
1866 can compute a maximum size. */
1870 size_tree
= lang_hooks
.types
.max_size (type
);
1872 if (size_tree
&& host_integerp (size_tree
, 1))
1873 size
= tree_low_cst (size_tree
, 1);
1879 /* Return the bit position of FIELD, in bits from the start of the record.
1880 This is a tree of type bitsizetype. */
1883 bit_position (const_tree field
)
1885 return bit_from_pos (DECL_FIELD_OFFSET (field
),
1886 DECL_FIELD_BIT_OFFSET (field
));
1889 /* Likewise, but return as an integer. It must be representable in
1890 that way (since it could be a signed value, we don't have the
1891 option of returning -1 like int_size_in_byte can. */
1894 int_bit_position (const_tree field
)
1896 return tree_low_cst (bit_position (field
), 0);
1899 /* Return the byte position of FIELD, in bytes from the start of the record.
1900 This is a tree of type sizetype. */
1903 byte_position (const_tree field
)
1905 return byte_from_pos (DECL_FIELD_OFFSET (field
),
1906 DECL_FIELD_BIT_OFFSET (field
));
1909 /* Likewise, but return as an integer. It must be representable in
1910 that way (since it could be a signed value, we don't have the
1911 option of returning -1 like int_size_in_byte can. */
1914 int_byte_position (const_tree field
)
1916 return tree_low_cst (byte_position (field
), 0);
1919 /* Return the strictest alignment, in bits, that T is known to have. */
1922 expr_align (const_tree t
)
1924 unsigned int align0
, align1
;
1926 switch (TREE_CODE (t
))
1928 case NOP_EXPR
: case CONVERT_EXPR
: case NON_LVALUE_EXPR
:
1929 /* If we have conversions, we know that the alignment of the
1930 object must meet each of the alignments of the types. */
1931 align0
= expr_align (TREE_OPERAND (t
, 0));
1932 align1
= TYPE_ALIGN (TREE_TYPE (t
));
1933 return MAX (align0
, align1
);
1935 case GIMPLE_MODIFY_STMT
:
1936 /* We should never ask for the alignment of a gimple statement. */
1939 case SAVE_EXPR
: case COMPOUND_EXPR
: case MODIFY_EXPR
:
1940 case INIT_EXPR
: case TARGET_EXPR
: case WITH_CLEANUP_EXPR
:
1941 case CLEANUP_POINT_EXPR
:
1942 /* These don't change the alignment of an object. */
1943 return expr_align (TREE_OPERAND (t
, 0));
1946 /* The best we can do is say that the alignment is the least aligned
1948 align0
= expr_align (TREE_OPERAND (t
, 1));
1949 align1
= expr_align (TREE_OPERAND (t
, 2));
1950 return MIN (align0
, align1
);
1952 /* FIXME: LABEL_DECL and CONST_DECL never have DECL_ALIGN set
1953 meaningfully, it's always 1. */
1954 case LABEL_DECL
: case CONST_DECL
:
1955 case VAR_DECL
: case PARM_DECL
: case RESULT_DECL
:
1957 gcc_assert (DECL_ALIGN (t
) != 0);
1958 return DECL_ALIGN (t
);
1964 /* Otherwise take the alignment from that of the type. */
1965 return TYPE_ALIGN (TREE_TYPE (t
));
1968 /* Return, as a tree node, the number of elements for TYPE (which is an
1969 ARRAY_TYPE) minus one. This counts only elements of the top array. */
1972 array_type_nelts (const_tree type
)
1974 tree index_type
, min
, max
;
1976 /* If they did it with unspecified bounds, then we should have already
1977 given an error about it before we got here. */
1978 if (! TYPE_DOMAIN (type
))
1979 return error_mark_node
;
1981 index_type
= TYPE_DOMAIN (type
);
1982 min
= TYPE_MIN_VALUE (index_type
);
1983 max
= TYPE_MAX_VALUE (index_type
);
1985 return (integer_zerop (min
)
1987 : fold_build2 (MINUS_EXPR
, TREE_TYPE (max
), max
, min
));
1990 /* If arg is static -- a reference to an object in static storage -- then
1991 return the object. This is not the same as the C meaning of `static'.
1992 If arg isn't static, return NULL. */
1997 switch (TREE_CODE (arg
))
2000 /* Nested functions are static, even though taking their address will
2001 involve a trampoline as we unnest the nested function and create
2002 the trampoline on the tree level. */
2006 return ((TREE_STATIC (arg
) || DECL_EXTERNAL (arg
))
2007 && ! DECL_THREAD_LOCAL_P (arg
)
2008 && ! DECL_DLLIMPORT_P (arg
)
2012 return ((TREE_STATIC (arg
) || DECL_EXTERNAL (arg
))
2016 return TREE_STATIC (arg
) ? arg
: NULL
;
2023 /* If the thing being referenced is not a field, then it is
2024 something language specific. */
2025 if (TREE_CODE (TREE_OPERAND (arg
, 1)) != FIELD_DECL
)
2026 return (*lang_hooks
.staticp
) (arg
);
2028 /* If we are referencing a bitfield, we can't evaluate an
2029 ADDR_EXPR at compile time and so it isn't a constant. */
2030 if (DECL_BIT_FIELD (TREE_OPERAND (arg
, 1)))
2033 return staticp (TREE_OPERAND (arg
, 0));
2038 case MISALIGNED_INDIRECT_REF
:
2039 case ALIGN_INDIRECT_REF
:
2041 return TREE_CONSTANT (TREE_OPERAND (arg
, 0)) ? arg
: NULL
;
2044 case ARRAY_RANGE_REF
:
2045 if (TREE_CODE (TYPE_SIZE (TREE_TYPE (arg
))) == INTEGER_CST
2046 && TREE_CODE (TREE_OPERAND (arg
, 1)) == INTEGER_CST
)
2047 return staticp (TREE_OPERAND (arg
, 0));
2052 if ((unsigned int) TREE_CODE (arg
)
2053 >= (unsigned int) LAST_AND_UNUSED_TREE_CODE
)
2054 return lang_hooks
.staticp (arg
);
2060 /* Wrap a SAVE_EXPR around EXPR, if appropriate.
2061 Do this to any expression which may be used in more than one place,
2062 but must be evaluated only once.
2064 Normally, expand_expr would reevaluate the expression each time.
2065 Calling save_expr produces something that is evaluated and recorded
2066 the first time expand_expr is called on it. Subsequent calls to
2067 expand_expr just reuse the recorded value.
2069 The call to expand_expr that generates code that actually computes
2070 the value is the first call *at compile time*. Subsequent calls
2071 *at compile time* generate code to use the saved value.
2072 This produces correct result provided that *at run time* control
2073 always flows through the insns made by the first expand_expr
2074 before reaching the other places where the save_expr was evaluated.
2075 You, the caller of save_expr, must make sure this is so.
2077 Constants, and certain read-only nodes, are returned with no
2078 SAVE_EXPR because that is safe. Expressions containing placeholders
2079 are not touched; see tree.def for an explanation of what these
2083 save_expr (tree expr
)
2085 tree t
= fold (expr
);
2088 /* If the tree evaluates to a constant, then we don't want to hide that
2089 fact (i.e. this allows further folding, and direct checks for constants).
2090 However, a read-only object that has side effects cannot be bypassed.
2091 Since it is no problem to reevaluate literals, we just return the
2093 inner
= skip_simple_arithmetic (t
);
2095 if (TREE_INVARIANT (inner
)
2096 || (TREE_READONLY (inner
) && ! TREE_SIDE_EFFECTS (inner
))
2097 || TREE_CODE (inner
) == SAVE_EXPR
2098 || TREE_CODE (inner
) == ERROR_MARK
)
2101 /* If INNER contains a PLACEHOLDER_EXPR, we must evaluate it each time, since
2102 it means that the size or offset of some field of an object depends on
2103 the value within another field.
2105 Note that it must not be the case that T contains both a PLACEHOLDER_EXPR
2106 and some variable since it would then need to be both evaluated once and
2107 evaluated more than once. Front-ends must assure this case cannot
2108 happen by surrounding any such subexpressions in their own SAVE_EXPR
2109 and forcing evaluation at the proper time. */
2110 if (contains_placeholder_p (inner
))
2113 t
= build1 (SAVE_EXPR
, TREE_TYPE (expr
), t
);
2115 /* This expression might be placed ahead of a jump to ensure that the
2116 value was computed on both sides of the jump. So make sure it isn't
2117 eliminated as dead. */
2118 TREE_SIDE_EFFECTS (t
) = 1;
2119 TREE_INVARIANT (t
) = 1;
2123 /* Look inside EXPR and into any simple arithmetic operations. Return
2124 the innermost non-arithmetic node. */
2127 skip_simple_arithmetic (tree expr
)
2131 /* We don't care about whether this can be used as an lvalue in this
2133 while (TREE_CODE (expr
) == NON_LVALUE_EXPR
)
2134 expr
= TREE_OPERAND (expr
, 0);
2136 /* If we have simple operations applied to a SAVE_EXPR or to a SAVE_EXPR and
2137 a constant, it will be more efficient to not make another SAVE_EXPR since
2138 it will allow better simplification and GCSE will be able to merge the
2139 computations if they actually occur. */
2143 if (UNARY_CLASS_P (inner
))
2144 inner
= TREE_OPERAND (inner
, 0);
2145 else if (BINARY_CLASS_P (inner
))
2147 if (TREE_INVARIANT (TREE_OPERAND (inner
, 1)))
2148 inner
= TREE_OPERAND (inner
, 0);
2149 else if (TREE_INVARIANT (TREE_OPERAND (inner
, 0)))
2150 inner
= TREE_OPERAND (inner
, 1);
2161 /* Return which tree structure is used by T. */
2163 enum tree_node_structure_enum
2164 tree_node_structure (const_tree t
)
2166 const enum tree_code code
= TREE_CODE (t
);
2168 switch (TREE_CODE_CLASS (code
))
2170 case tcc_declaration
:
2175 return TS_FIELD_DECL
;
2177 return TS_PARM_DECL
;
2181 return TS_LABEL_DECL
;
2183 return TS_RESULT_DECL
;
2185 return TS_CONST_DECL
;
2187 return TS_TYPE_DECL
;
2189 return TS_FUNCTION_DECL
;
2190 case SYMBOL_MEMORY_TAG
:
2191 case NAME_MEMORY_TAG
:
2192 case STRUCT_FIELD_TAG
:
2193 case MEMORY_PARTITION_TAG
:
2194 return TS_MEMORY_TAG
;
2196 return TS_DECL_NON_COMMON
;
2202 case tcc_comparison
:
2205 case tcc_expression
:
2209 case tcc_gimple_stmt
:
2210 return TS_GIMPLE_STATEMENT
;
2211 default: /* tcc_constant and tcc_exceptional */
2216 /* tcc_constant cases. */
2217 case INTEGER_CST
: return TS_INT_CST
;
2218 case REAL_CST
: return TS_REAL_CST
;
2219 case FIXED_CST
: return TS_FIXED_CST
;
2220 case COMPLEX_CST
: return TS_COMPLEX
;
2221 case VECTOR_CST
: return TS_VECTOR
;
2222 case STRING_CST
: return TS_STRING
;
2223 /* tcc_exceptional cases. */
2224 /* FIXME tuples: eventually this should be TS_BASE. For now, nothing
2226 case ERROR_MARK
: return TS_COMMON
;
2227 case IDENTIFIER_NODE
: return TS_IDENTIFIER
;
2228 case TREE_LIST
: return TS_LIST
;
2229 case TREE_VEC
: return TS_VEC
;
2230 case PHI_NODE
: return TS_PHI_NODE
;
2231 case SSA_NAME
: return TS_SSA_NAME
;
2232 case PLACEHOLDER_EXPR
: return TS_COMMON
;
2233 case STATEMENT_LIST
: return TS_STATEMENT_LIST
;
2234 case BLOCK
: return TS_BLOCK
;
2235 case CONSTRUCTOR
: return TS_CONSTRUCTOR
;
2236 case TREE_BINFO
: return TS_BINFO
;
2237 case VALUE_HANDLE
: return TS_VALUE_HANDLE
;
2238 case OMP_CLAUSE
: return TS_OMP_CLAUSE
;
2245 /* Return 1 if EXP contains a PLACEHOLDER_EXPR; i.e., if it represents a size
2246 or offset that depends on a field within a record. */
2249 contains_placeholder_p (const_tree exp
)
2251 enum tree_code code
;
2256 code
= TREE_CODE (exp
);
2257 if (code
== PLACEHOLDER_EXPR
)
2260 switch (TREE_CODE_CLASS (code
))
2263 /* Don't look at any PLACEHOLDER_EXPRs that might be in index or bit
2264 position computations since they will be converted into a
2265 WITH_RECORD_EXPR involving the reference, which will assume
2266 here will be valid. */
2267 return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0));
2269 case tcc_exceptional
:
2270 if (code
== TREE_LIST
)
2271 return (CONTAINS_PLACEHOLDER_P (TREE_VALUE (exp
))
2272 || CONTAINS_PLACEHOLDER_P (TREE_CHAIN (exp
)));
2277 case tcc_comparison
:
2278 case tcc_expression
:
2282 /* Ignoring the first operand isn't quite right, but works best. */
2283 return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 1));
2286 return (CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0))
2287 || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 1))
2288 || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 2)));
2294 switch (TREE_CODE_LENGTH (code
))
2297 return CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0));
2299 return (CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 0))
2300 || CONTAINS_PLACEHOLDER_P (TREE_OPERAND (exp
, 1)));
2311 const_call_expr_arg_iterator iter
;
2312 FOR_EACH_CONST_CALL_EXPR_ARG (arg
, iter
, exp
)
2313 if (CONTAINS_PLACEHOLDER_P (arg
))
2327 /* Return true if any part of the computation of TYPE involves a
2328 PLACEHOLDER_EXPR. This includes size, bounds, qualifiers
2329 (for QUAL_UNION_TYPE) and field positions. */
2332 type_contains_placeholder_1 (const_tree type
)
2334 /* If the size contains a placeholder or the parent type (component type in
2335 the case of arrays) type involves a placeholder, this type does. */
2336 if (CONTAINS_PLACEHOLDER_P (TYPE_SIZE (type
))
2337 || CONTAINS_PLACEHOLDER_P (TYPE_SIZE_UNIT (type
))
2338 || (TREE_TYPE (type
) != 0
2339 && type_contains_placeholder_p (TREE_TYPE (type
))))
2342 /* Now do type-specific checks. Note that the last part of the check above
2343 greatly limits what we have to do below. */
2344 switch (TREE_CODE (type
))
2352 case REFERENCE_TYPE
:
2360 case FIXED_POINT_TYPE
:
2361 /* Here we just check the bounds. */
2362 return (CONTAINS_PLACEHOLDER_P (TYPE_MIN_VALUE (type
))
2363 || CONTAINS_PLACEHOLDER_P (TYPE_MAX_VALUE (type
)));
2366 /* We're already checked the component type (TREE_TYPE), so just check
2368 return type_contains_placeholder_p (TYPE_DOMAIN (type
));
2372 case QUAL_UNION_TYPE
:
2376 for (field
= TYPE_FIELDS (type
); field
; field
= TREE_CHAIN (field
))
2377 if (TREE_CODE (field
) == FIELD_DECL
2378 && (CONTAINS_PLACEHOLDER_P (DECL_FIELD_OFFSET (field
))
2379 || (TREE_CODE (type
) == QUAL_UNION_TYPE
2380 && CONTAINS_PLACEHOLDER_P (DECL_QUALIFIER (field
)))
2381 || type_contains_placeholder_p (TREE_TYPE (field
))))
2393 type_contains_placeholder_p (tree type
)
2397 /* If the contains_placeholder_bits field has been initialized,
2398 then we know the answer. */
2399 if (TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) > 0)
2400 return TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) - 1;
2402 /* Indicate that we've seen this type node, and the answer is false.
2403 This is what we want to return if we run into recursion via fields. */
2404 TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) = 1;
2406 /* Compute the real value. */
2407 result
= type_contains_placeholder_1 (type
);
2409 /* Store the real value. */
2410 TYPE_CONTAINS_PLACEHOLDER_INTERNAL (type
) = result
+ 1;
2415 /* Given a tree EXP, a FIELD_DECL F, and a replacement value R,
2416 return a tree with all occurrences of references to F in a
2417 PLACEHOLDER_EXPR replaced by R. Note that we assume here that EXP
2418 contains only arithmetic expressions or a CALL_EXPR with a
2419 PLACEHOLDER_EXPR occurring only in its arglist. */
2422 substitute_in_expr (tree exp
, tree f
, tree r
)
2424 enum tree_code code
= TREE_CODE (exp
);
2425 tree op0
, op1
, op2
, op3
;
2429 /* We handle TREE_LIST and COMPONENT_REF separately. */
2430 if (code
== TREE_LIST
)
2432 op0
= SUBSTITUTE_IN_EXPR (TREE_CHAIN (exp
), f
, r
);
2433 op1
= SUBSTITUTE_IN_EXPR (TREE_VALUE (exp
), f
, r
);
2434 if (op0
== TREE_CHAIN (exp
) && op1
== TREE_VALUE (exp
))
2437 return tree_cons (TREE_PURPOSE (exp
), op1
, op0
);
2439 else if (code
== COMPONENT_REF
)
2441 /* If this expression is getting a value from a PLACEHOLDER_EXPR
2442 and it is the right field, replace it with R. */
2443 for (inner
= TREE_OPERAND (exp
, 0);
2444 REFERENCE_CLASS_P (inner
);
2445 inner
= TREE_OPERAND (inner
, 0))
2447 if (TREE_CODE (inner
) == PLACEHOLDER_EXPR
2448 && TREE_OPERAND (exp
, 1) == f
)
2451 /* If this expression hasn't been completed let, leave it alone. */
2452 if (TREE_CODE (inner
) == PLACEHOLDER_EXPR
&& TREE_TYPE (inner
) == 0)
2455 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
2456 if (op0
== TREE_OPERAND (exp
, 0))
2459 new = fold_build3 (COMPONENT_REF
, TREE_TYPE (exp
),
2460 op0
, TREE_OPERAND (exp
, 1), NULL_TREE
);
2463 switch (TREE_CODE_CLASS (code
))
2466 case tcc_declaration
:
2469 case tcc_exceptional
:
2472 case tcc_comparison
:
2473 case tcc_expression
:
2475 switch (TREE_CODE_LENGTH (code
))
2481 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
2482 if (op0
== TREE_OPERAND (exp
, 0))
2485 new = fold_build1 (code
, TREE_TYPE (exp
), op0
);
2489 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
2490 op1
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 1), f
, r
);
2492 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1))
2495 new = fold_build2 (code
, TREE_TYPE (exp
), op0
, op1
);
2499 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
2500 op1
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 1), f
, r
);
2501 op2
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 2), f
, r
);
2503 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
2504 && op2
== TREE_OPERAND (exp
, 2))
2507 new = fold_build3 (code
, TREE_TYPE (exp
), op0
, op1
, op2
);
2511 op0
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 0), f
, r
);
2512 op1
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 1), f
, r
);
2513 op2
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 2), f
, r
);
2514 op3
= SUBSTITUTE_IN_EXPR (TREE_OPERAND (exp
, 3), f
, r
);
2516 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
2517 && op2
== TREE_OPERAND (exp
, 2)
2518 && op3
== TREE_OPERAND (exp
, 3))
2521 new = fold (build4 (code
, TREE_TYPE (exp
), op0
, op1
, op2
, op3
));
2531 tree copy
= NULL_TREE
;
2533 int n
= TREE_OPERAND_LENGTH (exp
);
2534 for (i
= 1; i
< n
; i
++)
2536 tree op
= TREE_OPERAND (exp
, i
);
2537 tree newop
= SUBSTITUTE_IN_EXPR (op
, f
, r
);
2540 copy
= copy_node (exp
);
2541 TREE_OPERAND (copy
, i
) = newop
;
2554 TREE_READONLY (new) = TREE_READONLY (exp
);
2558 /* Similar, but look for a PLACEHOLDER_EXPR in EXP and find a replacement
2559 for it within OBJ, a tree that is an object or a chain of references. */
2562 substitute_placeholder_in_expr (tree exp
, tree obj
)
2564 enum tree_code code
= TREE_CODE (exp
);
2565 tree op0
, op1
, op2
, op3
;
2567 /* If this is a PLACEHOLDER_EXPR, see if we find a corresponding type
2568 in the chain of OBJ. */
2569 if (code
== PLACEHOLDER_EXPR
)
2571 tree need_type
= TYPE_MAIN_VARIANT (TREE_TYPE (exp
));
2574 for (elt
= obj
; elt
!= 0;
2575 elt
= ((TREE_CODE (elt
) == COMPOUND_EXPR
2576 || TREE_CODE (elt
) == COND_EXPR
)
2577 ? TREE_OPERAND (elt
, 1)
2578 : (REFERENCE_CLASS_P (elt
)
2579 || UNARY_CLASS_P (elt
)
2580 || BINARY_CLASS_P (elt
)
2581 || VL_EXP_CLASS_P (elt
)
2582 || EXPRESSION_CLASS_P (elt
))
2583 ? TREE_OPERAND (elt
, 0) : 0))
2584 if (TYPE_MAIN_VARIANT (TREE_TYPE (elt
)) == need_type
)
2587 for (elt
= obj
; elt
!= 0;
2588 elt
= ((TREE_CODE (elt
) == COMPOUND_EXPR
2589 || TREE_CODE (elt
) == COND_EXPR
)
2590 ? TREE_OPERAND (elt
, 1)
2591 : (REFERENCE_CLASS_P (elt
)
2592 || UNARY_CLASS_P (elt
)
2593 || BINARY_CLASS_P (elt
)
2594 || VL_EXP_CLASS_P (elt
)
2595 || EXPRESSION_CLASS_P (elt
))
2596 ? TREE_OPERAND (elt
, 0) : 0))
2597 if (POINTER_TYPE_P (TREE_TYPE (elt
))
2598 && (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (elt
)))
2600 return fold_build1 (INDIRECT_REF
, need_type
, elt
);
2602 /* If we didn't find it, return the original PLACEHOLDER_EXPR. If it
2603 survives until RTL generation, there will be an error. */
2607 /* TREE_LIST is special because we need to look at TREE_VALUE
2608 and TREE_CHAIN, not TREE_OPERANDS. */
2609 else if (code
== TREE_LIST
)
2611 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_CHAIN (exp
), obj
);
2612 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_VALUE (exp
), obj
);
2613 if (op0
== TREE_CHAIN (exp
) && op1
== TREE_VALUE (exp
))
2616 return tree_cons (TREE_PURPOSE (exp
), op1
, op0
);
2619 switch (TREE_CODE_CLASS (code
))
2622 case tcc_declaration
:
2625 case tcc_exceptional
:
2628 case tcc_comparison
:
2629 case tcc_expression
:
2632 switch (TREE_CODE_LENGTH (code
))
2638 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
2639 if (op0
== TREE_OPERAND (exp
, 0))
2642 return fold_build1 (code
, TREE_TYPE (exp
), op0
);
2645 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
2646 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 1), obj
);
2648 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1))
2651 return fold_build2 (code
, TREE_TYPE (exp
), op0
, op1
);
2654 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
2655 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 1), obj
);
2656 op2
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 2), obj
);
2658 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
2659 && op2
== TREE_OPERAND (exp
, 2))
2662 return fold_build3 (code
, TREE_TYPE (exp
), op0
, op1
, op2
);
2665 op0
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 0), obj
);
2666 op1
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 1), obj
);
2667 op2
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 2), obj
);
2668 op3
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (TREE_OPERAND (exp
, 3), obj
);
2670 if (op0
== TREE_OPERAND (exp
, 0) && op1
== TREE_OPERAND (exp
, 1)
2671 && op2
== TREE_OPERAND (exp
, 2)
2672 && op3
== TREE_OPERAND (exp
, 3))
2675 return fold (build4 (code
, TREE_TYPE (exp
), op0
, op1
, op2
, op3
));
2684 tree copy
= NULL_TREE
;
2686 int n
= TREE_OPERAND_LENGTH (exp
);
2687 for (i
= 1; i
< n
; i
++)
2689 tree op
= TREE_OPERAND (exp
, i
);
2690 tree newop
= SUBSTITUTE_PLACEHOLDER_IN_EXPR (op
, obj
);
2694 copy
= copy_node (exp
);
2695 TREE_OPERAND (copy
, i
) = newop
;
2709 /* Stabilize a reference so that we can use it any number of times
2710 without causing its operands to be evaluated more than once.
2711 Returns the stabilized reference. This works by means of save_expr,
2712 so see the caveats in the comments about save_expr.
2714 Also allows conversion expressions whose operands are references.
2715 Any other kind of expression is returned unchanged. */
2718 stabilize_reference (tree ref
)
2721 enum tree_code code
= TREE_CODE (ref
);
2728 /* No action is needed in this case. */
2734 case FIX_TRUNC_EXPR
:
2735 result
= build_nt (code
, stabilize_reference (TREE_OPERAND (ref
, 0)));
2739 result
= build_nt (INDIRECT_REF
,
2740 stabilize_reference_1 (TREE_OPERAND (ref
, 0)));
2744 result
= build_nt (COMPONENT_REF
,
2745 stabilize_reference (TREE_OPERAND (ref
, 0)),
2746 TREE_OPERAND (ref
, 1), NULL_TREE
);
2750 result
= build_nt (BIT_FIELD_REF
,
2751 stabilize_reference (TREE_OPERAND (ref
, 0)),
2752 stabilize_reference_1 (TREE_OPERAND (ref
, 1)),
2753 stabilize_reference_1 (TREE_OPERAND (ref
, 2)));
2757 result
= build_nt (ARRAY_REF
,
2758 stabilize_reference (TREE_OPERAND (ref
, 0)),
2759 stabilize_reference_1 (TREE_OPERAND (ref
, 1)),
2760 TREE_OPERAND (ref
, 2), TREE_OPERAND (ref
, 3));
2763 case ARRAY_RANGE_REF
:
2764 result
= build_nt (ARRAY_RANGE_REF
,
2765 stabilize_reference (TREE_OPERAND (ref
, 0)),
2766 stabilize_reference_1 (TREE_OPERAND (ref
, 1)),
2767 TREE_OPERAND (ref
, 2), TREE_OPERAND (ref
, 3));
2771 /* We cannot wrap the first expression in a SAVE_EXPR, as then
2772 it wouldn't be ignored. This matters when dealing with
2774 return stabilize_reference_1 (ref
);
2776 /* If arg isn't a kind of lvalue we recognize, make no change.
2777 Caller should recognize the error for an invalid lvalue. */
2782 return error_mark_node
;
2785 TREE_TYPE (result
) = TREE_TYPE (ref
);
2786 TREE_READONLY (result
) = TREE_READONLY (ref
);
2787 TREE_SIDE_EFFECTS (result
) = TREE_SIDE_EFFECTS (ref
);
2788 TREE_THIS_VOLATILE (result
) = TREE_THIS_VOLATILE (ref
);
2793 /* Subroutine of stabilize_reference; this is called for subtrees of
2794 references. Any expression with side-effects must be put in a SAVE_EXPR
2795 to ensure that it is only evaluated once.
2797 We don't put SAVE_EXPR nodes around everything, because assigning very
2798 simple expressions to temporaries causes us to miss good opportunities
2799 for optimizations. Among other things, the opportunity to fold in the
2800 addition of a constant into an addressing mode often gets lost, e.g.
2801 "y[i+1] += x;". In general, we take the approach that we should not make
2802 an assignment unless we are forced into it - i.e., that any non-side effect
2803 operator should be allowed, and that cse should take care of coalescing
2804 multiple utterances of the same expression should that prove fruitful. */
2807 stabilize_reference_1 (tree e
)
2810 enum tree_code code
= TREE_CODE (e
);
2812 /* We cannot ignore const expressions because it might be a reference
2813 to a const array but whose index contains side-effects. But we can
2814 ignore things that are actual constant or that already have been
2815 handled by this function. */
2817 if (TREE_INVARIANT (e
))
2820 switch (TREE_CODE_CLASS (code
))
2822 case tcc_exceptional
:
2824 case tcc_declaration
:
2825 case tcc_comparison
:
2827 case tcc_expression
:
2830 /* If the expression has side-effects, then encase it in a SAVE_EXPR
2831 so that it will only be evaluated once. */
2832 /* The reference (r) and comparison (<) classes could be handled as
2833 below, but it is generally faster to only evaluate them once. */
2834 if (TREE_SIDE_EFFECTS (e
))
2835 return save_expr (e
);
2839 /* Constants need no processing. In fact, we should never reach
2844 /* Division is slow and tends to be compiled with jumps,
2845 especially the division by powers of 2 that is often
2846 found inside of an array reference. So do it just once. */
2847 if (code
== TRUNC_DIV_EXPR
|| code
== TRUNC_MOD_EXPR
2848 || code
== FLOOR_DIV_EXPR
|| code
== FLOOR_MOD_EXPR
2849 || code
== CEIL_DIV_EXPR
|| code
== CEIL_MOD_EXPR
2850 || code
== ROUND_DIV_EXPR
|| code
== ROUND_MOD_EXPR
)
2851 return save_expr (e
);
2852 /* Recursively stabilize each operand. */
2853 result
= build_nt (code
, stabilize_reference_1 (TREE_OPERAND (e
, 0)),
2854 stabilize_reference_1 (TREE_OPERAND (e
, 1)));
2858 /* Recursively stabilize each operand. */
2859 result
= build_nt (code
, stabilize_reference_1 (TREE_OPERAND (e
, 0)));
2866 TREE_TYPE (result
) = TREE_TYPE (e
);
2867 TREE_READONLY (result
) = TREE_READONLY (e
);
2868 TREE_SIDE_EFFECTS (result
) = TREE_SIDE_EFFECTS (e
);
2869 TREE_THIS_VOLATILE (result
) = TREE_THIS_VOLATILE (e
);
2870 TREE_INVARIANT (result
) = 1;
2875 /* Low-level constructors for expressions. */
2877 /* A helper function for build1 and constant folders. Set TREE_CONSTANT,
2878 TREE_INVARIANT, and TREE_SIDE_EFFECTS for an ADDR_EXPR. */
2881 recompute_tree_invariant_for_addr_expr (tree t
)
2884 bool tc
= true, ti
= true, se
= false;
2886 /* We started out assuming this address is both invariant and constant, but
2887 does not have side effects. Now go down any handled components and see if
2888 any of them involve offsets that are either non-constant or non-invariant.
2889 Also check for side-effects.
2891 ??? Note that this code makes no attempt to deal with the case where
2892 taking the address of something causes a copy due to misalignment. */
2894 #define UPDATE_TITCSE(NODE) \
2895 do { tree _node = (NODE); \
2896 if (_node && !TREE_INVARIANT (_node)) ti = false; \
2897 if (_node && !TREE_CONSTANT (_node)) tc = false; \
2898 if (_node && TREE_SIDE_EFFECTS (_node)) se = true; } while (0)
2900 for (node
= TREE_OPERAND (t
, 0); handled_component_p (node
);
2901 node
= TREE_OPERAND (node
, 0))
2903 /* If the first operand doesn't have an ARRAY_TYPE, this is a bogus
2904 array reference (probably made temporarily by the G++ front end),
2905 so ignore all the operands. */
2906 if ((TREE_CODE (node
) == ARRAY_REF
2907 || TREE_CODE (node
) == ARRAY_RANGE_REF
)
2908 && TREE_CODE (TREE_TYPE (TREE_OPERAND (node
, 0))) == ARRAY_TYPE
)
2910 UPDATE_TITCSE (TREE_OPERAND (node
, 1));
2911 if (TREE_OPERAND (node
, 2))
2912 UPDATE_TITCSE (TREE_OPERAND (node
, 2));
2913 if (TREE_OPERAND (node
, 3))
2914 UPDATE_TITCSE (TREE_OPERAND (node
, 3));
2916 /* Likewise, just because this is a COMPONENT_REF doesn't mean we have a
2917 FIELD_DECL, apparently. The G++ front end can put something else
2918 there, at least temporarily. */
2919 else if (TREE_CODE (node
) == COMPONENT_REF
2920 && TREE_CODE (TREE_OPERAND (node
, 1)) == FIELD_DECL
)
2922 if (TREE_OPERAND (node
, 2))
2923 UPDATE_TITCSE (TREE_OPERAND (node
, 2));
2925 else if (TREE_CODE (node
) == BIT_FIELD_REF
)
2926 UPDATE_TITCSE (TREE_OPERAND (node
, 2));
2929 node
= lang_hooks
.expr_to_decl (node
, &tc
, &ti
, &se
);
2931 /* Now see what's inside. If it's an INDIRECT_REF, copy our properties from
2932 the address, since &(*a)->b is a form of addition. If it's a decl, it's
2933 invariant and constant if the decl is static. It's also invariant if it's
2934 a decl in the current function. Taking the address of a volatile variable
2935 is not volatile. If it's a constant, the address is both invariant and
2936 constant. Otherwise it's neither. */
2937 if (TREE_CODE (node
) == INDIRECT_REF
)
2938 UPDATE_TITCSE (TREE_OPERAND (node
, 0));
2939 else if (DECL_P (node
))
2943 else if (decl_function_context (node
) == current_function_decl
2944 /* Addresses of thread-local variables are invariant. */
2945 || (TREE_CODE (node
) == VAR_DECL
2946 && DECL_THREAD_LOCAL_P (node
)))
2951 else if (CONSTANT_CLASS_P (node
))
2956 se
|= TREE_SIDE_EFFECTS (node
);
2959 TREE_CONSTANT (t
) = tc
;
2960 TREE_INVARIANT (t
) = ti
;
2961 TREE_SIDE_EFFECTS (t
) = se
;
2962 #undef UPDATE_TITCSE
2965 /* Build an expression of code CODE, data type TYPE, and operands as
2966 specified. Expressions and reference nodes can be created this way.
2967 Constants, decls, types and misc nodes cannot be.
2969 We define 5 non-variadic functions, from 0 to 4 arguments. This is
2970 enough for all extant tree codes. */
2973 build0_stat (enum tree_code code
, tree tt MEM_STAT_DECL
)
2977 gcc_assert (TREE_CODE_LENGTH (code
) == 0);
2979 t
= make_node_stat (code PASS_MEM_STAT
);
2986 build1_stat (enum tree_code code
, tree type
, tree node MEM_STAT_DECL
)
2988 int length
= sizeof (struct tree_exp
);
2989 #ifdef GATHER_STATISTICS
2990 tree_node_kind kind
;
2994 #ifdef GATHER_STATISTICS
2995 switch (TREE_CODE_CLASS (code
))
2997 case tcc_statement
: /* an expression with side effects */
3000 case tcc_reference
: /* a reference */
3008 tree_node_counts
[(int) kind
]++;
3009 tree_node_sizes
[(int) kind
] += length
;
3012 gcc_assert (TREE_CODE_LENGTH (code
) == 1);
3014 t
= ggc_alloc_zone_pass_stat (length
, &tree_zone
);
3016 memset (t
, 0, sizeof (struct tree_common
));
3018 TREE_SET_CODE (t
, code
);
3020 TREE_TYPE (t
) = type
;
3021 #ifdef USE_MAPPED_LOCATION
3022 SET_EXPR_LOCATION (t
, UNKNOWN_LOCATION
);
3024 SET_EXPR_LOCUS (t
, NULL
);
3026 TREE_OPERAND (t
, 0) = node
;
3027 TREE_BLOCK (t
) = NULL_TREE
;
3028 if (node
&& !TYPE_P (node
))
3030 TREE_SIDE_EFFECTS (t
) = TREE_SIDE_EFFECTS (node
);
3031 TREE_READONLY (t
) = TREE_READONLY (node
);
3034 if (TREE_CODE_CLASS (code
) == tcc_statement
)
3035 TREE_SIDE_EFFECTS (t
) = 1;
3039 /* All of these have side-effects, no matter what their
3041 TREE_SIDE_EFFECTS (t
) = 1;
3042 TREE_READONLY (t
) = 0;
3045 case MISALIGNED_INDIRECT_REF
:
3046 case ALIGN_INDIRECT_REF
:
3048 /* Whether a dereference is readonly has nothing to do with whether
3049 its operand is readonly. */
3050 TREE_READONLY (t
) = 0;
3055 recompute_tree_invariant_for_addr_expr (t
);
3059 if ((TREE_CODE_CLASS (code
) == tcc_unary
|| code
== VIEW_CONVERT_EXPR
)
3060 && node
&& !TYPE_P (node
)
3061 && TREE_CONSTANT (node
))
3062 TREE_CONSTANT (t
) = 1;
3063 if ((TREE_CODE_CLASS (code
) == tcc_unary
|| code
== VIEW_CONVERT_EXPR
)
3064 && node
&& TREE_INVARIANT (node
))
3065 TREE_INVARIANT (t
) = 1;
3066 if (TREE_CODE_CLASS (code
) == tcc_reference
3067 && node
&& TREE_THIS_VOLATILE (node
))
3068 TREE_THIS_VOLATILE (t
) = 1;
3075 #define PROCESS_ARG(N) \
3077 TREE_OPERAND (t, N) = arg##N; \
3078 if (arg##N &&!TYPE_P (arg##N)) \
3080 if (TREE_SIDE_EFFECTS (arg##N)) \
3082 if (!TREE_READONLY (arg##N)) \
3084 if (!TREE_CONSTANT (arg##N)) \
3086 if (!TREE_INVARIANT (arg##N)) \
3092 build2_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1 MEM_STAT_DECL
)
3094 bool constant
, read_only
, side_effects
, invariant
;
3097 gcc_assert (TREE_CODE_LENGTH (code
) == 2);
3100 /* FIXME tuples: Statement's aren't expressions! */
3101 if (code
== GIMPLE_MODIFY_STMT
)
3102 return build_gimple_modify_stmt_stat (arg0
, arg1 PASS_MEM_STAT
);
3104 /* Must use build_gimple_modify_stmt to construct GIMPLE_MODIFY_STMTs. */
3105 gcc_assert (code
!= GIMPLE_MODIFY_STMT
);
3108 if ((code
== MINUS_EXPR
|| code
== PLUS_EXPR
|| code
== MULT_EXPR
)
3109 && arg0
&& arg1
&& tt
&& POINTER_TYPE_P (tt
))
3110 gcc_assert (TREE_CODE (arg0
) == INTEGER_CST
&& TREE_CODE (arg1
) == INTEGER_CST
);
3112 if (code
== POINTER_PLUS_EXPR
&& arg0
&& arg1
&& tt
)
3113 gcc_assert (POINTER_TYPE_P (tt
) && POINTER_TYPE_P (TREE_TYPE (arg0
))
3114 && INTEGRAL_TYPE_P (TREE_TYPE (arg1
))
3115 && useless_type_conversion_p (sizetype
, TREE_TYPE (arg1
)));
3117 t
= make_node_stat (code PASS_MEM_STAT
);
3120 /* Below, we automatically set TREE_SIDE_EFFECTS and TREE_READONLY for the
3121 result based on those same flags for the arguments. But if the
3122 arguments aren't really even `tree' expressions, we shouldn't be trying
3125 /* Expressions without side effects may be constant if their
3126 arguments are as well. */
3127 constant
= (TREE_CODE_CLASS (code
) == tcc_comparison
3128 || TREE_CODE_CLASS (code
) == tcc_binary
);
3130 side_effects
= TREE_SIDE_EFFECTS (t
);
3131 invariant
= constant
;
3136 TREE_READONLY (t
) = read_only
;
3137 TREE_CONSTANT (t
) = constant
;
3138 TREE_INVARIANT (t
) = invariant
;
3139 TREE_SIDE_EFFECTS (t
) = side_effects
;
3140 TREE_THIS_VOLATILE (t
)
3141 = (TREE_CODE_CLASS (code
) == tcc_reference
3142 && arg0
&& TREE_THIS_VOLATILE (arg0
));
3148 /* Build a GIMPLE_MODIFY_STMT node. This tree code doesn't have a
3149 type, so we can't use build2 (a.k.a. build2_stat). */
3152 build_gimple_modify_stmt_stat (tree arg0
, tree arg1 MEM_STAT_DECL
)
3156 t
= make_node_stat (GIMPLE_MODIFY_STMT PASS_MEM_STAT
);
3157 /* ?? We don't care about setting flags for tuples... */
3158 GIMPLE_STMT_OPERAND (t
, 0) = arg0
;
3159 GIMPLE_STMT_OPERAND (t
, 1) = arg1
;
3164 build3_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
3165 tree arg2 MEM_STAT_DECL
)
3167 bool constant
, read_only
, side_effects
, invariant
;
3170 gcc_assert (TREE_CODE_LENGTH (code
) == 3);
3171 gcc_assert (TREE_CODE_CLASS (code
) != tcc_vl_exp
);
3173 t
= make_node_stat (code PASS_MEM_STAT
);
3176 /* As a special exception, if COND_EXPR has NULL branches, we
3177 assume that it is a gimple statement and always consider
3178 it to have side effects. */
3179 if (code
== COND_EXPR
3180 && tt
== void_type_node
3181 && arg1
== NULL_TREE
3182 && arg2
== NULL_TREE
)
3183 side_effects
= true;
3185 side_effects
= TREE_SIDE_EFFECTS (t
);
3191 TREE_SIDE_EFFECTS (t
) = side_effects
;
3192 TREE_THIS_VOLATILE (t
)
3193 = (TREE_CODE_CLASS (code
) == tcc_reference
3194 && arg0
&& TREE_THIS_VOLATILE (arg0
));
3200 build4_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
3201 tree arg2
, tree arg3 MEM_STAT_DECL
)
3203 bool constant
, read_only
, side_effects
, invariant
;
3206 gcc_assert (TREE_CODE_LENGTH (code
) == 4);
3208 t
= make_node_stat (code PASS_MEM_STAT
);
3211 side_effects
= TREE_SIDE_EFFECTS (t
);
3218 TREE_SIDE_EFFECTS (t
) = side_effects
;
3219 TREE_THIS_VOLATILE (t
)
3220 = (TREE_CODE_CLASS (code
) == tcc_reference
3221 && arg0
&& TREE_THIS_VOLATILE (arg0
));
3227 build5_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
3228 tree arg2
, tree arg3
, tree arg4 MEM_STAT_DECL
)
3230 bool constant
, read_only
, side_effects
, invariant
;
3233 gcc_assert (TREE_CODE_LENGTH (code
) == 5);
3235 t
= make_node_stat (code PASS_MEM_STAT
);
3238 side_effects
= TREE_SIDE_EFFECTS (t
);
3246 TREE_SIDE_EFFECTS (t
) = side_effects
;
3247 TREE_THIS_VOLATILE (t
)
3248 = (TREE_CODE_CLASS (code
) == tcc_reference
3249 && arg0
&& TREE_THIS_VOLATILE (arg0
));
3255 build7_stat (enum tree_code code
, tree tt
, tree arg0
, tree arg1
,
3256 tree arg2
, tree arg3
, tree arg4
, tree arg5
,
3257 tree arg6 MEM_STAT_DECL
)
3259 bool constant
, read_only
, side_effects
, invariant
;
3262 gcc_assert (code
== TARGET_MEM_REF
);
3264 t
= make_node_stat (code PASS_MEM_STAT
);
3267 side_effects
= TREE_SIDE_EFFECTS (t
);
3277 TREE_SIDE_EFFECTS (t
) = side_effects
;
3278 TREE_THIS_VOLATILE (t
) = 0;
3283 /* Similar except don't specify the TREE_TYPE
3284 and leave the TREE_SIDE_EFFECTS as 0.
3285 It is permissible for arguments to be null,
3286 or even garbage if their values do not matter. */
3289 build_nt (enum tree_code code
, ...)
3296 gcc_assert (TREE_CODE_CLASS (code
) != tcc_vl_exp
);
3300 t
= make_node (code
);
3301 length
= TREE_CODE_LENGTH (code
);
3303 for (i
= 0; i
< length
; i
++)
3304 TREE_OPERAND (t
, i
) = va_arg (p
, tree
);
3310 /* Similar to build_nt, but for creating a CALL_EXPR object with
3311 ARGLIST passed as a list. */
3314 build_nt_call_list (tree fn
, tree arglist
)
3319 t
= build_vl_exp (CALL_EXPR
, list_length (arglist
) + 3);
3320 CALL_EXPR_FN (t
) = fn
;
3321 CALL_EXPR_STATIC_CHAIN (t
) = NULL_TREE
;
3322 for (i
= 0; arglist
; arglist
= TREE_CHAIN (arglist
), i
++)
3323 CALL_EXPR_ARG (t
, i
) = TREE_VALUE (arglist
);
3327 /* Create a DECL_... node of code CODE, name NAME and data type TYPE.
3328 We do NOT enter this node in any sort of symbol table.
3330 layout_decl is used to set up the decl's storage layout.
3331 Other slots are initialized to 0 or null pointers. */
3334 build_decl_stat (enum tree_code code
, tree name
, tree type MEM_STAT_DECL
)
3338 t
= make_node_stat (code PASS_MEM_STAT
);
3340 /* if (type == error_mark_node)
3341 type = integer_type_node; */
3342 /* That is not done, deliberately, so that having error_mark_node
3343 as the type can suppress useless errors in the use of this variable. */
3345 DECL_NAME (t
) = name
;
3346 TREE_TYPE (t
) = type
;
3348 if (code
== VAR_DECL
|| code
== PARM_DECL
|| code
== RESULT_DECL
)
3354 /* Builds and returns function declaration with NAME and TYPE. */
3357 build_fn_decl (const char *name
, tree type
)
3359 tree id
= get_identifier (name
);
3360 tree decl
= build_decl (FUNCTION_DECL
, id
, type
);
3362 DECL_EXTERNAL (decl
) = 1;
3363 TREE_PUBLIC (decl
) = 1;
3364 DECL_ARTIFICIAL (decl
) = 1;
3365 TREE_NOTHROW (decl
) = 1;
3371 /* BLOCK nodes are used to represent the structure of binding contours
3372 and declarations, once those contours have been exited and their contents
3373 compiled. This information is used for outputting debugging info. */
3376 build_block (tree vars
, tree subblocks
, tree supercontext
, tree chain
)
3378 tree block
= make_node (BLOCK
);
3380 BLOCK_VARS (block
) = vars
;
3381 BLOCK_SUBBLOCKS (block
) = subblocks
;
3382 BLOCK_SUPERCONTEXT (block
) = supercontext
;
3383 BLOCK_CHAIN (block
) = chain
;
3387 #if 1 /* ! defined(USE_MAPPED_LOCATION) */
3388 /* ??? gengtype doesn't handle conditionals */
3389 static GTY(()) source_locus last_annotated_node
;
3392 #ifdef USE_MAPPED_LOCATION
3395 expand_location (source_location loc
)
3397 expanded_location xloc
;
3406 const struct line_map
*map
= linemap_lookup (&line_table
, loc
);
3407 xloc
.file
= map
->to_file
;
3408 xloc
.line
= SOURCE_LINE (map
, loc
);
3409 xloc
.column
= SOURCE_COLUMN (map
, loc
);
3416 /* Record the exact location where an expression or an identifier were
3420 annotate_with_file_line (tree node
, const char *file
, int line
)
3422 /* Roughly one percent of the calls to this function are to annotate
3423 a node with the same information already attached to that node!
3424 Just return instead of wasting memory. */
3425 if (EXPR_LOCUS (node
)
3426 && EXPR_LINENO (node
) == line
3427 && (EXPR_FILENAME (node
) == file
3428 || !strcmp (EXPR_FILENAME (node
), file
)))
3430 last_annotated_node
= EXPR_LOCUS (node
);
3434 /* In heavily macroized code (such as GCC itself) this single
3435 entry cache can reduce the number of allocations by more
3437 if (last_annotated_node
3438 && last_annotated_node
->line
== line
3439 && (last_annotated_node
->file
== file
3440 || !strcmp (last_annotated_node
->file
, file
)))
3442 SET_EXPR_LOCUS (node
, last_annotated_node
);
3446 SET_EXPR_LOCUS (node
, ggc_alloc (sizeof (location_t
)));
3447 EXPR_LINENO (node
) = line
;
3448 EXPR_FILENAME (node
) = file
;
3449 last_annotated_node
= EXPR_LOCUS (node
);
3453 annotate_with_locus (tree node
, location_t locus
)
3455 annotate_with_file_line (node
, locus
.file
, locus
.line
);
3459 /* Source location accessor functions. */
3462 /* The source location of this expression. Non-tree_exp nodes such as
3463 decls and constants can be shared among multiple locations, so
3466 expr_location (const_tree node
)
3468 #ifdef USE_MAPPED_LOCATION
3469 if (GIMPLE_STMT_P (node
))
3470 return GIMPLE_STMT_LOCUS (node
);
3471 return EXPR_P (node
) ? node
->exp
.locus
: UNKNOWN_LOCATION
;
3473 if (GIMPLE_STMT_P (node
))
3474 return EXPR_HAS_LOCATION (node
)
3475 ? *GIMPLE_STMT_LOCUS (node
) : UNKNOWN_LOCATION
;
3476 return EXPR_HAS_LOCATION (node
) ? *node
->exp
.locus
: UNKNOWN_LOCATION
;
3481 set_expr_location (tree node
, location_t locus
)
3483 #ifdef USE_MAPPED_LOCATION
3484 if (GIMPLE_STMT_P (node
))
3485 GIMPLE_STMT_LOCUS (node
) = locus
;
3487 EXPR_CHECK (node
)->exp
.locus
= locus
;
3489 annotate_with_locus (node
, locus
);
3494 expr_has_location (const_tree node
)
3496 #ifdef USE_MAPPED_LOCATION
3497 return expr_location (node
) != UNKNOWN_LOCATION
;
3499 return expr_locus (node
) != NULL
;
3503 #ifdef USE_MAPPED_LOCATION
3508 expr_locus (const_tree node
)
3510 #ifdef USE_MAPPED_LOCATION
3511 if (GIMPLE_STMT_P (node
))
3512 return &GIMPLE_STMT_LOCUS (node
);
3513 return EXPR_P (node
) ? &node
->exp
.locus
: (location_t
*) NULL
;
3515 if (GIMPLE_STMT_P (node
))
3516 return GIMPLE_STMT_LOCUS (node
);
3517 /* ?? The cast below was originally "(location_t *)" in the macro,
3518 but that makes no sense. ?? */
3519 return EXPR_P (node
) ? node
->exp
.locus
: (source_locus
) NULL
;
3524 set_expr_locus (tree node
,
3525 #ifdef USE_MAPPED_LOCATION
3526 source_location
*loc
3532 #ifdef USE_MAPPED_LOCATION
3535 if (GIMPLE_STMT_P (node
))
3536 GIMPLE_STMT_LOCUS (node
) = UNKNOWN_LOCATION
;
3538 EXPR_CHECK (node
)->exp
.locus
= UNKNOWN_LOCATION
;
3542 if (GIMPLE_STMT_P (node
))
3543 GIMPLE_STMT_LOCUS (node
) = *loc
;
3545 EXPR_CHECK (node
)->exp
.locus
= *loc
;
3548 if (GIMPLE_STMT_P (node
))
3549 GIMPLE_STMT_LOCUS (node
) = loc
;
3551 EXPR_CHECK (node
)->exp
.locus
= loc
;
3556 expr_filename (const_tree node
)
3558 #ifdef USE_MAPPED_LOCATION
3559 if (GIMPLE_STMT_P (node
))
3560 return &LOCATION_FILE (GIMPLE_STMT_LOCUS (node
));
3561 return &LOCATION_FILE (EXPR_CHECK (node
)->exp
.locus
);
3563 if (GIMPLE_STMT_P (node
))
3564 return &GIMPLE_STMT_LOCUS (node
)->file
;
3565 return &(EXPR_CHECK (node
)->exp
.locus
->file
);
3570 expr_lineno (const_tree node
)
3572 #ifdef USE_MAPPED_LOCATION
3573 if (GIMPLE_STMT_P (node
))
3574 return &LOCATION_LINE (GIMPLE_STMT_LOCUS (node
));
3575 return &LOCATION_LINE (EXPR_CHECK (node
)->exp
.locus
);
3577 if (GIMPLE_STMT_P (node
))
3578 return &GIMPLE_STMT_LOCUS (node
)->line
;
3579 return &EXPR_CHECK (node
)->exp
.locus
->line
;
3583 /* Return a declaration like DDECL except that its DECL_ATTRIBUTES
3587 build_decl_attribute_variant (tree ddecl
, tree attribute
)
3589 DECL_ATTRIBUTES (ddecl
) = attribute
;
3593 /* Borrowed from hashtab.c iterative_hash implementation. */
3594 #define mix(a,b,c) \
3596 a -= b; a -= c; a ^= (c>>13); \
3597 b -= c; b -= a; b ^= (a<< 8); \
3598 c -= a; c -= b; c ^= ((b&0xffffffff)>>13); \
3599 a -= b; a -= c; a ^= ((c&0xffffffff)>>12); \
3600 b -= c; b -= a; b = (b ^ (a<<16)) & 0xffffffff; \
3601 c -= a; c -= b; c = (c ^ (b>> 5)) & 0xffffffff; \
3602 a -= b; a -= c; a = (a ^ (c>> 3)) & 0xffffffff; \
3603 b -= c; b -= a; b = (b ^ (a<<10)) & 0xffffffff; \
3604 c -= a; c -= b; c = (c ^ (b>>15)) & 0xffffffff; \
3608 /* Produce good hash value combining VAL and VAL2. */
3609 static inline hashval_t
3610 iterative_hash_hashval_t (hashval_t val
, hashval_t val2
)
3612 /* the golden ratio; an arbitrary value. */
3613 hashval_t a
= 0x9e3779b9;
3619 /* Produce good hash value combining PTR and VAL2. */
3620 static inline hashval_t
3621 iterative_hash_pointer (const void *ptr
, hashval_t val2
)
3623 if (sizeof (ptr
) == sizeof (hashval_t
))
3624 return iterative_hash_hashval_t ((size_t) ptr
, val2
);
3627 hashval_t a
= (hashval_t
) (size_t) ptr
;
3628 /* Avoid warnings about shifting of more than the width of the type on
3629 hosts that won't execute this path. */
3631 hashval_t b
= (hashval_t
) ((size_t) ptr
>> (sizeof (hashval_t
) * 8 + zero
));
3637 /* Produce good hash value combining VAL and VAL2. */
3638 static inline hashval_t
3639 iterative_hash_host_wide_int (HOST_WIDE_INT val
, hashval_t val2
)
3641 if (sizeof (HOST_WIDE_INT
) == sizeof (hashval_t
))
3642 return iterative_hash_hashval_t (val
, val2
);
3645 hashval_t a
= (hashval_t
) val
;
3646 /* Avoid warnings about shifting of more than the width of the type on
3647 hosts that won't execute this path. */
3649 hashval_t b
= (hashval_t
) (val
>> (sizeof (hashval_t
) * 8 + zero
));
3651 if (sizeof (HOST_WIDE_INT
) > 2 * sizeof (hashval_t
))
3653 hashval_t a
= (hashval_t
) (val
>> (sizeof (hashval_t
) * 16 + zero
));
3654 hashval_t b
= (hashval_t
) (val
>> (sizeof (hashval_t
) * 24 + zero
));
3661 /* Return a type like TTYPE except that its TYPE_ATTRIBUTE
3662 is ATTRIBUTE and its qualifiers are QUALS.
3664 Record such modified types already made so we don't make duplicates. */
3667 build_type_attribute_qual_variant (tree ttype
, tree attribute
, int quals
)
3669 if (! attribute_list_equal (TYPE_ATTRIBUTES (ttype
), attribute
))
3671 hashval_t hashcode
= 0;
3673 enum tree_code code
= TREE_CODE (ttype
);
3675 ntype
= copy_node (ttype
);
3677 TYPE_POINTER_TO (ntype
) = 0;
3678 TYPE_REFERENCE_TO (ntype
) = 0;
3679 TYPE_ATTRIBUTES (ntype
) = attribute
;
3681 /* Create a new main variant of TYPE. */
3682 TYPE_MAIN_VARIANT (ntype
) = ntype
;
3683 TYPE_NEXT_VARIANT (ntype
) = 0;
3684 set_type_quals (ntype
, TYPE_UNQUALIFIED
);
3686 hashcode
= iterative_hash_object (code
, hashcode
);
3687 if (TREE_TYPE (ntype
))
3688 hashcode
= iterative_hash_object (TYPE_HASH (TREE_TYPE (ntype
)),
3690 hashcode
= attribute_hash_list (attribute
, hashcode
);
3692 switch (TREE_CODE (ntype
))
3695 hashcode
= type_hash_list (TYPE_ARG_TYPES (ntype
), hashcode
);
3698 hashcode
= iterative_hash_object (TYPE_HASH (TYPE_DOMAIN (ntype
)),
3702 hashcode
= iterative_hash_object
3703 (TREE_INT_CST_LOW (TYPE_MAX_VALUE (ntype
)), hashcode
);
3704 hashcode
= iterative_hash_object
3705 (TREE_INT_CST_HIGH (TYPE_MAX_VALUE (ntype
)), hashcode
);
3708 case FIXED_POINT_TYPE
:
3710 unsigned int precision
= TYPE_PRECISION (ntype
);
3711 hashcode
= iterative_hash_object (precision
, hashcode
);
3718 ntype
= type_hash_canon (hashcode
, ntype
);
3720 /* If the target-dependent attributes make NTYPE different from
3721 its canonical type, we will need to use structural equality
3722 checks for this qualified type. */
3723 ttype
= build_qualified_type (ttype
, TYPE_UNQUALIFIED
);
3724 if (TYPE_STRUCTURAL_EQUALITY_P (ttype
)
3725 || !targetm
.comp_type_attributes (ntype
, ttype
))
3726 SET_TYPE_STRUCTURAL_EQUALITY (ntype
);
3728 TYPE_CANONICAL (ntype
) = TYPE_CANONICAL (ttype
);
3730 ttype
= build_qualified_type (ntype
, quals
);
3737 /* Return a type like TTYPE except that its TYPE_ATTRIBUTE
3740 Record such modified types already made so we don't make duplicates. */
3743 build_type_attribute_variant (tree ttype
, tree attribute
)
3745 return build_type_attribute_qual_variant (ttype
, attribute
,
3746 TYPE_QUALS (ttype
));
3749 /* Return nonzero if IDENT is a valid name for attribute ATTR,
3752 We try both `text' and `__text__', ATTR may be either one. */
3753 /* ??? It might be a reasonable simplification to require ATTR to be only
3754 `text'. One might then also require attribute lists to be stored in
3755 their canonicalized form. */
3758 is_attribute_with_length_p (const char *attr
, int attr_len
, const_tree ident
)
3763 if (TREE_CODE (ident
) != IDENTIFIER_NODE
)
3766 p
= IDENTIFIER_POINTER (ident
);
3767 ident_len
= IDENTIFIER_LENGTH (ident
);
3769 if (ident_len
== attr_len
3770 && strcmp (attr
, p
) == 0)
3773 /* If ATTR is `__text__', IDENT must be `text'; and vice versa. */
3776 gcc_assert (attr
[1] == '_');
3777 gcc_assert (attr
[attr_len
- 2] == '_');
3778 gcc_assert (attr
[attr_len
- 1] == '_');
3779 if (ident_len
== attr_len
- 4
3780 && strncmp (attr
+ 2, p
, attr_len
- 4) == 0)
3785 if (ident_len
== attr_len
+ 4
3786 && p
[0] == '_' && p
[1] == '_'
3787 && p
[ident_len
- 2] == '_' && p
[ident_len
- 1] == '_'
3788 && strncmp (attr
, p
+ 2, attr_len
) == 0)
3795 /* Return nonzero if IDENT is a valid name for attribute ATTR,
3798 We try both `text' and `__text__', ATTR may be either one. */
3801 is_attribute_p (const char *attr
, const_tree ident
)
3803 return is_attribute_with_length_p (attr
, strlen (attr
), ident
);
3806 /* Given an attribute name and a list of attributes, return a pointer to the
3807 attribute's list element if the attribute is part of the list, or NULL_TREE
3808 if not found. If the attribute appears more than once, this only
3809 returns the first occurrence; the TREE_CHAIN of the return value should
3810 be passed back in if further occurrences are wanted. */
3812 #define LOOKUP_ATTRIBUTE_BODY(TYPE) do { \
3814 size_t attr_len = strlen (attr_name); \
3815 for (l = list; l; l = TREE_CHAIN (l)) \
3817 gcc_assert (TREE_CODE (TREE_PURPOSE (l)) == IDENTIFIER_NODE); \
3818 if (is_attribute_with_length_p (attr_name, attr_len, TREE_PURPOSE (l))) \
3825 lookup_attribute (const char *attr_name
, tree list
)
3827 LOOKUP_ATTRIBUTE_BODY(tree
);
3831 const_lookup_attribute (const char *attr_name
, const_tree list
)
3833 LOOKUP_ATTRIBUTE_BODY(const_tree
);
3836 /* Remove any instances of attribute ATTR_NAME in LIST and return the
3840 remove_attribute (const char *attr_name
, tree list
)
3843 size_t attr_len
= strlen (attr_name
);
3845 for (p
= &list
; *p
; )
3848 gcc_assert (TREE_CODE (TREE_PURPOSE (l
)) == IDENTIFIER_NODE
);
3849 if (is_attribute_with_length_p (attr_name
, attr_len
, TREE_PURPOSE (l
)))
3850 *p
= TREE_CHAIN (l
);
3852 p
= &TREE_CHAIN (l
);
3858 /* Return an attribute list that is the union of a1 and a2. */
3861 merge_attributes (tree a1
, tree a2
)
3865 /* Either one unset? Take the set one. */
3867 if ((attributes
= a1
) == 0)
3870 /* One that completely contains the other? Take it. */
3872 else if (a2
!= 0 && ! attribute_list_contained (a1
, a2
))
3874 if (attribute_list_contained (a2
, a1
))
3878 /* Pick the longest list, and hang on the other list. */
3880 if (list_length (a1
) < list_length (a2
))
3881 attributes
= a2
, a2
= a1
;
3883 for (; a2
!= 0; a2
= TREE_CHAIN (a2
))
3886 for (a
= lookup_attribute (IDENTIFIER_POINTER (TREE_PURPOSE (a2
)),
3889 a
= lookup_attribute (IDENTIFIER_POINTER (TREE_PURPOSE (a2
)),
3892 if (TREE_VALUE (a
) != NULL
3893 && TREE_CODE (TREE_VALUE (a
)) == TREE_LIST
3894 && TREE_VALUE (a2
) != NULL
3895 && TREE_CODE (TREE_VALUE (a2
)) == TREE_LIST
)
3897 if (simple_cst_list_equal (TREE_VALUE (a
),
3898 TREE_VALUE (a2
)) == 1)
3901 else if (simple_cst_equal (TREE_VALUE (a
),
3902 TREE_VALUE (a2
)) == 1)
3907 a1
= copy_node (a2
);
3908 TREE_CHAIN (a1
) = attributes
;
3917 /* Given types T1 and T2, merge their attributes and return
3921 merge_type_attributes (tree t1
, tree t2
)
3923 return merge_attributes (TYPE_ATTRIBUTES (t1
),
3924 TYPE_ATTRIBUTES (t2
));
3927 /* Given decls OLDDECL and NEWDECL, merge their attributes and return
3931 merge_decl_attributes (tree olddecl
, tree newdecl
)
3933 return merge_attributes (DECL_ATTRIBUTES (olddecl
),
3934 DECL_ATTRIBUTES (newdecl
));
3937 #if TARGET_DLLIMPORT_DECL_ATTRIBUTES
3939 /* Specialization of merge_decl_attributes for various Windows targets.
3941 This handles the following situation:
3943 __declspec (dllimport) int foo;
3946 The second instance of `foo' nullifies the dllimport. */
3949 merge_dllimport_decl_attributes (tree old
, tree
new)
3952 int delete_dllimport_p
= 1;
3954 /* What we need to do here is remove from `old' dllimport if it doesn't
3955 appear in `new'. dllimport behaves like extern: if a declaration is
3956 marked dllimport and a definition appears later, then the object
3957 is not dllimport'd. We also remove a `new' dllimport if the old list
3958 contains dllexport: dllexport always overrides dllimport, regardless
3959 of the order of declaration. */
3960 if (!VAR_OR_FUNCTION_DECL_P (new))
3961 delete_dllimport_p
= 0;
3962 else if (DECL_DLLIMPORT_P (new)
3963 && lookup_attribute ("dllexport", DECL_ATTRIBUTES (old
)))
3965 DECL_DLLIMPORT_P (new) = 0;
3966 warning (OPT_Wattributes
, "%q+D already declared with dllexport attribute: "
3967 "dllimport ignored", new);
3969 else if (DECL_DLLIMPORT_P (old
) && !DECL_DLLIMPORT_P (new))
3971 /* Warn about overriding a symbol that has already been used. eg:
3972 extern int __attribute__ ((dllimport)) foo;
3973 int* bar () {return &foo;}
3976 if (TREE_USED (old
))
3978 warning (0, "%q+D redeclared without dllimport attribute "
3979 "after being referenced with dll linkage", new);
3980 /* If we have used a variable's address with dllimport linkage,
3981 keep the old DECL_DLLIMPORT_P flag: the ADDR_EXPR using the
3982 decl may already have had TREE_INVARIANT and TREE_CONSTANT
3984 We still remove the attribute so that assembler code refers
3985 to '&foo rather than '_imp__foo'. */
3986 if (TREE_CODE (old
) == VAR_DECL
&& TREE_ADDRESSABLE (old
))
3987 DECL_DLLIMPORT_P (new) = 1;
3990 /* Let an inline definition silently override the external reference,
3991 but otherwise warn about attribute inconsistency. */
3992 else if (TREE_CODE (new) == VAR_DECL
3993 || !DECL_DECLARED_INLINE_P (new))
3994 warning (OPT_Wattributes
, "%q+D redeclared without dllimport attribute: "
3995 "previous dllimport ignored", new);
3998 delete_dllimport_p
= 0;
4000 a
= merge_attributes (DECL_ATTRIBUTES (old
), DECL_ATTRIBUTES (new));
4002 if (delete_dllimport_p
)
4005 const size_t attr_len
= strlen ("dllimport");
4007 /* Scan the list for dllimport and delete it. */
4008 for (prev
= NULL_TREE
, t
= a
; t
; prev
= t
, t
= TREE_CHAIN (t
))
4010 if (is_attribute_with_length_p ("dllimport", attr_len
,
4013 if (prev
== NULL_TREE
)
4016 TREE_CHAIN (prev
) = TREE_CHAIN (t
);
4025 /* Handle a "dllimport" or "dllexport" attribute; arguments as in
4026 struct attribute_spec.handler. */
4029 handle_dll_attribute (tree
* pnode
, tree name
, tree args
, int flags
,
4034 /* These attributes may apply to structure and union types being created,
4035 but otherwise should pass to the declaration involved. */
4038 if (flags
& ((int) ATTR_FLAG_DECL_NEXT
| (int) ATTR_FLAG_FUNCTION_NEXT
4039 | (int) ATTR_FLAG_ARRAY_NEXT
))
4041 *no_add_attrs
= true;
4042 return tree_cons (name
, args
, NULL_TREE
);
4044 if (TREE_CODE (node
) == RECORD_TYPE
4045 || TREE_CODE (node
) == UNION_TYPE
)
4047 node
= TYPE_NAME (node
);
4053 warning (OPT_Wattributes
, "%qs attribute ignored",
4054 IDENTIFIER_POINTER (name
));
4055 *no_add_attrs
= true;
4060 if (TREE_CODE (node
) != FUNCTION_DECL
4061 && TREE_CODE (node
) != VAR_DECL
4062 && TREE_CODE (node
) != TYPE_DECL
)
4064 *no_add_attrs
= true;
4065 warning (OPT_Wattributes
, "%qs attribute ignored",
4066 IDENTIFIER_POINTER (name
));
4070 /* Report error on dllimport ambiguities seen now before they cause
4072 else if (is_attribute_p ("dllimport", name
))
4074 /* Honor any target-specific overrides. */
4075 if (!targetm
.valid_dllimport_attribute_p (node
))
4076 *no_add_attrs
= true;
4078 else if (TREE_CODE (node
) == FUNCTION_DECL
4079 && DECL_DECLARED_INLINE_P (node
))
4081 warning (OPT_Wattributes
, "inline function %q+D declared as "
4082 " dllimport: attribute ignored", node
);
4083 *no_add_attrs
= true;
4085 /* Like MS, treat definition of dllimported variables and
4086 non-inlined functions on declaration as syntax errors. */
4087 else if (TREE_CODE (node
) == FUNCTION_DECL
&& DECL_INITIAL (node
))
4089 error ("function %q+D definition is marked dllimport", node
);
4090 *no_add_attrs
= true;
4093 else if (TREE_CODE (node
) == VAR_DECL
)
4095 if (DECL_INITIAL (node
))
4097 error ("variable %q+D definition is marked dllimport",
4099 *no_add_attrs
= true;
4102 /* `extern' needn't be specified with dllimport.
4103 Specify `extern' now and hope for the best. Sigh. */
4104 DECL_EXTERNAL (node
) = 1;
4105 /* Also, implicitly give dllimport'd variables declared within
4106 a function global scope, unless declared static. */
4107 if (current_function_decl
!= NULL_TREE
&& !TREE_STATIC (node
))
4108 TREE_PUBLIC (node
) = 1;
4111 if (*no_add_attrs
== false)
4112 DECL_DLLIMPORT_P (node
) = 1;
4115 /* Report error if symbol is not accessible at global scope. */
4116 if (!TREE_PUBLIC (node
)
4117 && (TREE_CODE (node
) == VAR_DECL
4118 || TREE_CODE (node
) == FUNCTION_DECL
))
4120 error ("external linkage required for symbol %q+D because of "
4121 "%qs attribute", node
, IDENTIFIER_POINTER (name
));
4122 *no_add_attrs
= true;
4125 /* A dllexport'd entity must have default visibility so that other
4126 program units (shared libraries or the main executable) can see
4127 it. A dllimport'd entity must have default visibility so that
4128 the linker knows that undefined references within this program
4129 unit can be resolved by the dynamic linker. */
4132 if (DECL_VISIBILITY_SPECIFIED (node
)
4133 && DECL_VISIBILITY (node
) != VISIBILITY_DEFAULT
)
4134 error ("%qs implies default visibility, but %qD has already "
4135 "been declared with a different visibility",
4136 IDENTIFIER_POINTER (name
), node
);
4137 DECL_VISIBILITY (node
) = VISIBILITY_DEFAULT
;
4138 DECL_VISIBILITY_SPECIFIED (node
) = 1;
4144 #endif /* TARGET_DLLIMPORT_DECL_ATTRIBUTES */
4146 /* Set the type qualifiers for TYPE to TYPE_QUALS, which is a bitmask
4147 of the various TYPE_QUAL values. */
4150 set_type_quals (tree type
, int type_quals
)
4152 TYPE_READONLY (type
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
4153 TYPE_VOLATILE (type
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
4154 TYPE_RESTRICT (type
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
4157 /* Returns true iff cand is equivalent to base with type_quals. */
4160 check_qualified_type (const_tree cand
, const_tree base
, int type_quals
)
4162 return (TYPE_QUALS (cand
) == type_quals
4163 && TYPE_NAME (cand
) == TYPE_NAME (base
)
4164 /* Apparently this is needed for Objective-C. */
4165 && TYPE_CONTEXT (cand
) == TYPE_CONTEXT (base
)
4166 && attribute_list_equal (TYPE_ATTRIBUTES (cand
),
4167 TYPE_ATTRIBUTES (base
)));
4170 /* Return a version of the TYPE, qualified as indicated by the
4171 TYPE_QUALS, if one exists. If no qualified version exists yet,
4172 return NULL_TREE. */
4175 get_qualified_type (tree type
, int type_quals
)
4179 if (TYPE_QUALS (type
) == type_quals
)
4182 /* Search the chain of variants to see if there is already one there just
4183 like the one we need to have. If so, use that existing one. We must
4184 preserve the TYPE_NAME, since there is code that depends on this. */
4185 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
4186 if (check_qualified_type (t
, type
, type_quals
))
4192 /* Like get_qualified_type, but creates the type if it does not
4193 exist. This function never returns NULL_TREE. */
4196 build_qualified_type (tree type
, int type_quals
)
4200 /* See if we already have the appropriate qualified variant. */
4201 t
= get_qualified_type (type
, type_quals
);
4203 /* If not, build it. */
4206 t
= build_variant_type_copy (type
);
4207 set_type_quals (t
, type_quals
);
4209 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
4210 /* Propagate structural equality. */
4211 SET_TYPE_STRUCTURAL_EQUALITY (t
);
4212 else if (TYPE_CANONICAL (type
) != type
)
4213 /* Build the underlying canonical type, since it is different
4215 TYPE_CANONICAL (t
) = build_qualified_type (TYPE_CANONICAL (type
),
4218 /* T is its own canonical type. */
4219 TYPE_CANONICAL (t
) = t
;
4226 /* Create a new distinct copy of TYPE. The new type is made its own
4227 MAIN_VARIANT. If TYPE requires structural equality checks, the
4228 resulting type requires structural equality checks; otherwise, its
4229 TYPE_CANONICAL points to itself. */
4232 build_distinct_type_copy (tree type
)
4234 tree t
= copy_node (type
);
4236 TYPE_POINTER_TO (t
) = 0;
4237 TYPE_REFERENCE_TO (t
) = 0;
4239 /* Set the canonical type either to a new equivalence class, or
4240 propagate the need for structural equality checks. */
4241 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
4242 SET_TYPE_STRUCTURAL_EQUALITY (t
);
4244 TYPE_CANONICAL (t
) = t
;
4246 /* Make it its own variant. */
4247 TYPE_MAIN_VARIANT (t
) = t
;
4248 TYPE_NEXT_VARIANT (t
) = 0;
4250 /* Note that it is now possible for TYPE_MIN_VALUE to be a value
4251 whose TREE_TYPE is not t. This can also happen in the Ada
4252 frontend when using subtypes. */
4257 /* Create a new variant of TYPE, equivalent but distinct. This is so
4258 the caller can modify it. TYPE_CANONICAL for the return type will
4259 be equivalent to TYPE_CANONICAL of TYPE, indicating that the types
4260 are considered equal by the language itself (or that both types
4261 require structural equality checks). */
4264 build_variant_type_copy (tree type
)
4266 tree t
, m
= TYPE_MAIN_VARIANT (type
);
4268 t
= build_distinct_type_copy (type
);
4270 /* Since we're building a variant, assume that it is a non-semantic
4271 variant. This also propagates TYPE_STRUCTURAL_EQUALITY_P. */
4272 TYPE_CANONICAL (t
) = TYPE_CANONICAL (type
);
4274 /* Add the new type to the chain of variants of TYPE. */
4275 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (m
);
4276 TYPE_NEXT_VARIANT (m
) = t
;
4277 TYPE_MAIN_VARIANT (t
) = m
;
4282 /* Return true if the from tree in both tree maps are equal. */
4285 tree_map_base_eq (const void *va
, const void *vb
)
4287 const struct tree_map_base
*const a
= va
, *const b
= vb
;
4288 return (a
->from
== b
->from
);
4291 /* Hash a from tree in a tree_map. */
4294 tree_map_base_hash (const void *item
)
4296 return htab_hash_pointer (((const struct tree_map_base
*)item
)->from
);
4299 /* Return true if this tree map structure is marked for garbage collection
4300 purposes. We simply return true if the from tree is marked, so that this
4301 structure goes away when the from tree goes away. */
4304 tree_map_base_marked_p (const void *p
)
4306 return ggc_marked_p (((const struct tree_map_base
*) p
)->from
);
4310 tree_map_hash (const void *item
)
4312 return (((const struct tree_map
*) item
)->hash
);
4315 /* Return the initialization priority for DECL. */
4318 decl_init_priority_lookup (tree decl
)
4320 struct tree_priority_map
*h
;
4321 struct tree_map_base in
;
4323 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
4324 gcc_assert (TREE_CODE (decl
) == VAR_DECL
4325 ? DECL_HAS_INIT_PRIORITY_P (decl
)
4326 : DECL_STATIC_CONSTRUCTOR (decl
));
4328 h
= htab_find (init_priority_for_decl
, &in
);
4329 return h
? h
->init
: DEFAULT_INIT_PRIORITY
;
4332 /* Return the finalization priority for DECL. */
4335 decl_fini_priority_lookup (tree decl
)
4337 struct tree_priority_map
*h
;
4338 struct tree_map_base in
;
4340 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
);
4341 gcc_assert (DECL_STATIC_DESTRUCTOR (decl
));
4343 h
= htab_find (init_priority_for_decl
, &in
);
4344 return h
? h
->fini
: DEFAULT_INIT_PRIORITY
;
4347 /* Return the initialization and finalization priority information for
4348 DECL. If there is no previous priority information, a freshly
4349 allocated structure is returned. */
4351 static struct tree_priority_map
*
4352 decl_priority_info (tree decl
)
4354 struct tree_priority_map in
;
4355 struct tree_priority_map
*h
;
4358 in
.base
.from
= decl
;
4359 loc
= htab_find_slot (init_priority_for_decl
, &in
, INSERT
);
4363 h
= GGC_CNEW (struct tree_priority_map
);
4365 h
->base
.from
= decl
;
4366 h
->init
= DEFAULT_INIT_PRIORITY
;
4367 h
->fini
= DEFAULT_INIT_PRIORITY
;
4373 /* Set the initialization priority for DECL to PRIORITY. */
4376 decl_init_priority_insert (tree decl
, priority_type priority
)
4378 struct tree_priority_map
*h
;
4380 gcc_assert (VAR_OR_FUNCTION_DECL_P (decl
));
4381 h
= decl_priority_info (decl
);
4385 /* Set the finalization priority for DECL to PRIORITY. */
4388 decl_fini_priority_insert (tree decl
, priority_type priority
)
4390 struct tree_priority_map
*h
;
4392 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
);
4393 h
= decl_priority_info (decl
);
4397 /* Look up a restrict qualified base decl for FROM. */
4400 decl_restrict_base_lookup (tree from
)
4405 in
.base
.from
= from
;
4406 h
= htab_find_with_hash (restrict_base_for_decl
, &in
,
4407 htab_hash_pointer (from
));
4408 return h
? h
->to
: NULL_TREE
;
4411 /* Record the restrict qualified base TO for FROM. */
4414 decl_restrict_base_insert (tree from
, tree to
)
4419 h
= ggc_alloc (sizeof (struct tree_map
));
4420 h
->hash
= htab_hash_pointer (from
);
4421 h
->base
.from
= from
;
4423 loc
= htab_find_slot_with_hash (restrict_base_for_decl
, h
, h
->hash
, INSERT
);
4424 *(struct tree_map
**) loc
= h
;
4427 /* Print out the statistics for the DECL_DEBUG_EXPR hash table. */
4430 print_debug_expr_statistics (void)
4432 fprintf (stderr
, "DECL_DEBUG_EXPR hash: size %ld, %ld elements, %f collisions\n",
4433 (long) htab_size (debug_expr_for_decl
),
4434 (long) htab_elements (debug_expr_for_decl
),
4435 htab_collisions (debug_expr_for_decl
));
4438 /* Print out the statistics for the DECL_VALUE_EXPR hash table. */
4441 print_value_expr_statistics (void)
4443 fprintf (stderr
, "DECL_VALUE_EXPR hash: size %ld, %ld elements, %f collisions\n",
4444 (long) htab_size (value_expr_for_decl
),
4445 (long) htab_elements (value_expr_for_decl
),
4446 htab_collisions (value_expr_for_decl
));
4449 /* Print out statistics for the RESTRICT_BASE_FOR_DECL hash table, but
4450 don't print anything if the table is empty. */
4453 print_restrict_base_statistics (void)
4455 if (htab_elements (restrict_base_for_decl
) != 0)
4457 "RESTRICT_BASE hash: size %ld, %ld elements, %f collisions\n",
4458 (long) htab_size (restrict_base_for_decl
),
4459 (long) htab_elements (restrict_base_for_decl
),
4460 htab_collisions (restrict_base_for_decl
));
4463 /* Lookup a debug expression for FROM, and return it if we find one. */
4466 decl_debug_expr_lookup (tree from
)
4468 struct tree_map
*h
, in
;
4469 in
.base
.from
= from
;
4471 h
= htab_find_with_hash (debug_expr_for_decl
, &in
, htab_hash_pointer (from
));
4477 /* Insert a mapping FROM->TO in the debug expression hashtable. */
4480 decl_debug_expr_insert (tree from
, tree to
)
4485 h
= ggc_alloc (sizeof (struct tree_map
));
4486 h
->hash
= htab_hash_pointer (from
);
4487 h
->base
.from
= from
;
4489 loc
= htab_find_slot_with_hash (debug_expr_for_decl
, h
, h
->hash
, INSERT
);
4490 *(struct tree_map
**) loc
= h
;
4493 /* Lookup a value expression for FROM, and return it if we find one. */
4496 decl_value_expr_lookup (tree from
)
4498 struct tree_map
*h
, in
;
4499 in
.base
.from
= from
;
4501 h
= htab_find_with_hash (value_expr_for_decl
, &in
, htab_hash_pointer (from
));
4507 /* Insert a mapping FROM->TO in the value expression hashtable. */
4510 decl_value_expr_insert (tree from
, tree to
)
4515 h
= ggc_alloc (sizeof (struct tree_map
));
4516 h
->hash
= htab_hash_pointer (from
);
4517 h
->base
.from
= from
;
4519 loc
= htab_find_slot_with_hash (value_expr_for_decl
, h
, h
->hash
, INSERT
);
4520 *(struct tree_map
**) loc
= h
;
4523 /* Hashing of types so that we don't make duplicates.
4524 The entry point is `type_hash_canon'. */
4526 /* Compute a hash code for a list of types (chain of TREE_LIST nodes
4527 with types in the TREE_VALUE slots), by adding the hash codes
4528 of the individual types. */
4531 type_hash_list (const_tree list
, hashval_t hashcode
)
4535 for (tail
= list
; tail
; tail
= TREE_CHAIN (tail
))
4536 if (TREE_VALUE (tail
) != error_mark_node
)
4537 hashcode
= iterative_hash_object (TYPE_HASH (TREE_VALUE (tail
)),
4543 /* These are the Hashtable callback functions. */
4545 /* Returns true iff the types are equivalent. */
4548 type_hash_eq (const void *va
, const void *vb
)
4550 const struct type_hash
*const a
= va
, *const b
= vb
;
4552 /* First test the things that are the same for all types. */
4553 if (a
->hash
!= b
->hash
4554 || TREE_CODE (a
->type
) != TREE_CODE (b
->type
)
4555 || TREE_TYPE (a
->type
) != TREE_TYPE (b
->type
)
4556 || !attribute_list_equal (TYPE_ATTRIBUTES (a
->type
),
4557 TYPE_ATTRIBUTES (b
->type
))
4558 || TYPE_ALIGN (a
->type
) != TYPE_ALIGN (b
->type
)
4559 || TYPE_MODE (a
->type
) != TYPE_MODE (b
->type
))
4562 switch (TREE_CODE (a
->type
))
4567 case REFERENCE_TYPE
:
4571 return TYPE_VECTOR_SUBPARTS (a
->type
) == TYPE_VECTOR_SUBPARTS (b
->type
);
4574 if (TYPE_VALUES (a
->type
) != TYPE_VALUES (b
->type
)
4575 && !(TYPE_VALUES (a
->type
)
4576 && TREE_CODE (TYPE_VALUES (a
->type
)) == TREE_LIST
4577 && TYPE_VALUES (b
->type
)
4578 && TREE_CODE (TYPE_VALUES (b
->type
)) == TREE_LIST
4579 && type_list_equal (TYPE_VALUES (a
->type
),
4580 TYPE_VALUES (b
->type
))))
4583 /* ... fall through ... */
4588 return ((TYPE_MAX_VALUE (a
->type
) == TYPE_MAX_VALUE (b
->type
)
4589 || tree_int_cst_equal (TYPE_MAX_VALUE (a
->type
),
4590 TYPE_MAX_VALUE (b
->type
)))
4591 && (TYPE_MIN_VALUE (a
->type
) == TYPE_MIN_VALUE (b
->type
)
4592 || tree_int_cst_equal (TYPE_MIN_VALUE (a
->type
),
4593 TYPE_MIN_VALUE (b
->type
))));
4595 case FIXED_POINT_TYPE
:
4596 return TYPE_SATURATING (a
->type
) == TYPE_SATURATING (b
->type
);
4599 return TYPE_OFFSET_BASETYPE (a
->type
) == TYPE_OFFSET_BASETYPE (b
->type
);
4602 return (TYPE_METHOD_BASETYPE (a
->type
) == TYPE_METHOD_BASETYPE (b
->type
)
4603 && (TYPE_ARG_TYPES (a
->type
) == TYPE_ARG_TYPES (b
->type
)
4604 || (TYPE_ARG_TYPES (a
->type
)
4605 && TREE_CODE (TYPE_ARG_TYPES (a
->type
)) == TREE_LIST
4606 && TYPE_ARG_TYPES (b
->type
)
4607 && TREE_CODE (TYPE_ARG_TYPES (b
->type
)) == TREE_LIST
4608 && type_list_equal (TYPE_ARG_TYPES (a
->type
),
4609 TYPE_ARG_TYPES (b
->type
)))));
4612 return TYPE_DOMAIN (a
->type
) == TYPE_DOMAIN (b
->type
);
4616 case QUAL_UNION_TYPE
:
4617 return (TYPE_FIELDS (a
->type
) == TYPE_FIELDS (b
->type
)
4618 || (TYPE_FIELDS (a
->type
)
4619 && TREE_CODE (TYPE_FIELDS (a
->type
)) == TREE_LIST
4620 && TYPE_FIELDS (b
->type
)
4621 && TREE_CODE (TYPE_FIELDS (b
->type
)) == TREE_LIST
4622 && type_list_equal (TYPE_FIELDS (a
->type
),
4623 TYPE_FIELDS (b
->type
))));
4626 return (TYPE_ARG_TYPES (a
->type
) == TYPE_ARG_TYPES (b
->type
)
4627 || (TYPE_ARG_TYPES (a
->type
)
4628 && TREE_CODE (TYPE_ARG_TYPES (a
->type
)) == TREE_LIST
4629 && TYPE_ARG_TYPES (b
->type
)
4630 && TREE_CODE (TYPE_ARG_TYPES (b
->type
)) == TREE_LIST
4631 && type_list_equal (TYPE_ARG_TYPES (a
->type
),
4632 TYPE_ARG_TYPES (b
->type
))));
4639 /* Return the cached hash value. */
4642 type_hash_hash (const void *item
)
4644 return ((const struct type_hash
*) item
)->hash
;
4647 /* Look in the type hash table for a type isomorphic to TYPE.
4648 If one is found, return it. Otherwise return 0. */
4651 type_hash_lookup (hashval_t hashcode
, tree type
)
4653 struct type_hash
*h
, in
;
4655 /* The TYPE_ALIGN field of a type is set by layout_type(), so we
4656 must call that routine before comparing TYPE_ALIGNs. */
4662 h
= htab_find_with_hash (type_hash_table
, &in
, hashcode
);
4668 /* Add an entry to the type-hash-table
4669 for a type TYPE whose hash code is HASHCODE. */
4672 type_hash_add (hashval_t hashcode
, tree type
)
4674 struct type_hash
*h
;
4677 h
= ggc_alloc (sizeof (struct type_hash
));
4680 loc
= htab_find_slot_with_hash (type_hash_table
, h
, hashcode
, INSERT
);
4681 *(struct type_hash
**) loc
= h
;
4684 /* Given TYPE, and HASHCODE its hash code, return the canonical
4685 object for an identical type if one already exists.
4686 Otherwise, return TYPE, and record it as the canonical object.
4688 To use this function, first create a type of the sort you want.
4689 Then compute its hash code from the fields of the type that
4690 make it different from other similar types.
4691 Then call this function and use the value. */
4694 type_hash_canon (unsigned int hashcode
, tree type
)
4698 /* The hash table only contains main variants, so ensure that's what we're
4700 gcc_assert (TYPE_MAIN_VARIANT (type
) == type
);
4702 if (!lang_hooks
.types
.hash_types
)
4705 /* See if the type is in the hash table already. If so, return it.
4706 Otherwise, add the type. */
4707 t1
= type_hash_lookup (hashcode
, type
);
4710 #ifdef GATHER_STATISTICS
4711 tree_node_counts
[(int) t_kind
]--;
4712 tree_node_sizes
[(int) t_kind
] -= sizeof (struct tree_type
);
4718 type_hash_add (hashcode
, type
);
4723 /* See if the data pointed to by the type hash table is marked. We consider
4724 it marked if the type is marked or if a debug type number or symbol
4725 table entry has been made for the type. This reduces the amount of
4726 debugging output and eliminates that dependency of the debug output on
4727 the number of garbage collections. */
4730 type_hash_marked_p (const void *p
)
4732 const_tree
const type
= ((const struct type_hash
*) p
)->type
;
4734 return ggc_marked_p (type
) || TYPE_SYMTAB_POINTER (type
);
4738 print_type_hash_statistics (void)
4740 fprintf (stderr
, "Type hash: size %ld, %ld elements, %f collisions\n",
4741 (long) htab_size (type_hash_table
),
4742 (long) htab_elements (type_hash_table
),
4743 htab_collisions (type_hash_table
));
4746 /* Compute a hash code for a list of attributes (chain of TREE_LIST nodes
4747 with names in the TREE_PURPOSE slots and args in the TREE_VALUE slots),
4748 by adding the hash codes of the individual attributes. */
4751 attribute_hash_list (const_tree list
, hashval_t hashcode
)
4755 for (tail
= list
; tail
; tail
= TREE_CHAIN (tail
))
4756 /* ??? Do we want to add in TREE_VALUE too? */
4757 hashcode
= iterative_hash_object
4758 (IDENTIFIER_HASH_VALUE (TREE_PURPOSE (tail
)), hashcode
);
4762 /* Given two lists of attributes, return true if list l2 is
4763 equivalent to l1. */
4766 attribute_list_equal (const_tree l1
, const_tree l2
)
4768 return attribute_list_contained (l1
, l2
)
4769 && attribute_list_contained (l2
, l1
);
4772 /* Given two lists of attributes, return true if list L2 is
4773 completely contained within L1. */
4774 /* ??? This would be faster if attribute names were stored in a canonicalized
4775 form. Otherwise, if L1 uses `foo' and L2 uses `__foo__', the long method
4776 must be used to show these elements are equivalent (which they are). */
4777 /* ??? It's not clear that attributes with arguments will always be handled
4781 attribute_list_contained (const_tree l1
, const_tree l2
)
4785 /* First check the obvious, maybe the lists are identical. */
4789 /* Maybe the lists are similar. */
4790 for (t1
= l1
, t2
= l2
;
4792 && TREE_PURPOSE (t1
) == TREE_PURPOSE (t2
)
4793 && TREE_VALUE (t1
) == TREE_VALUE (t2
);
4794 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
));
4796 /* Maybe the lists are equal. */
4797 if (t1
== 0 && t2
== 0)
4800 for (; t2
!= 0; t2
= TREE_CHAIN (t2
))
4803 for (attr
= const_lookup_attribute (IDENTIFIER_POINTER (TREE_PURPOSE (t2
)), l1
);
4805 attr
= const_lookup_attribute (IDENTIFIER_POINTER (TREE_PURPOSE (t2
)),
4808 if (TREE_VALUE (t2
) != NULL
4809 && TREE_CODE (TREE_VALUE (t2
)) == TREE_LIST
4810 && TREE_VALUE (attr
) != NULL
4811 && TREE_CODE (TREE_VALUE (attr
)) == TREE_LIST
)
4813 if (simple_cst_list_equal (TREE_VALUE (t2
),
4814 TREE_VALUE (attr
)) == 1)
4817 else if (simple_cst_equal (TREE_VALUE (t2
), TREE_VALUE (attr
)) == 1)
4828 /* Given two lists of types
4829 (chains of TREE_LIST nodes with types in the TREE_VALUE slots)
4830 return 1 if the lists contain the same types in the same order.
4831 Also, the TREE_PURPOSEs must match. */
4834 type_list_equal (const_tree l1
, const_tree l2
)
4838 for (t1
= l1
, t2
= l2
; t1
&& t2
; t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
4839 if (TREE_VALUE (t1
) != TREE_VALUE (t2
)
4840 || (TREE_PURPOSE (t1
) != TREE_PURPOSE (t2
)
4841 && ! (1 == simple_cst_equal (TREE_PURPOSE (t1
), TREE_PURPOSE (t2
))
4842 && (TREE_TYPE (TREE_PURPOSE (t1
))
4843 == TREE_TYPE (TREE_PURPOSE (t2
))))))
4849 /* Returns the number of arguments to the FUNCTION_TYPE or METHOD_TYPE
4850 given by TYPE. If the argument list accepts variable arguments,
4851 then this function counts only the ordinary arguments. */
4854 type_num_arguments (const_tree type
)
4859 for (t
= TYPE_ARG_TYPES (type
); t
; t
= TREE_CHAIN (t
))
4860 /* If the function does not take a variable number of arguments,
4861 the last element in the list will have type `void'. */
4862 if (VOID_TYPE_P (TREE_VALUE (t
)))
4870 /* Nonzero if integer constants T1 and T2
4871 represent the same constant value. */
4874 tree_int_cst_equal (const_tree t1
, const_tree t2
)
4879 if (t1
== 0 || t2
== 0)
4882 if (TREE_CODE (t1
) == INTEGER_CST
4883 && TREE_CODE (t2
) == INTEGER_CST
4884 && TREE_INT_CST_LOW (t1
) == TREE_INT_CST_LOW (t2
)
4885 && TREE_INT_CST_HIGH (t1
) == TREE_INT_CST_HIGH (t2
))
4891 /* Nonzero if integer constants T1 and T2 represent values that satisfy <.
4892 The precise way of comparison depends on their data type. */
4895 tree_int_cst_lt (const_tree t1
, const_tree t2
)
4900 if (TYPE_UNSIGNED (TREE_TYPE (t1
)) != TYPE_UNSIGNED (TREE_TYPE (t2
)))
4902 int t1_sgn
= tree_int_cst_sgn (t1
);
4903 int t2_sgn
= tree_int_cst_sgn (t2
);
4905 if (t1_sgn
< t2_sgn
)
4907 else if (t1_sgn
> t2_sgn
)
4909 /* Otherwise, both are non-negative, so we compare them as
4910 unsigned just in case one of them would overflow a signed
4913 else if (!TYPE_UNSIGNED (TREE_TYPE (t1
)))
4914 return INT_CST_LT (t1
, t2
);
4916 return INT_CST_LT_UNSIGNED (t1
, t2
);
4919 /* Returns -1 if T1 < T2, 0 if T1 == T2, and 1 if T1 > T2. */
4922 tree_int_cst_compare (const_tree t1
, const_tree t2
)
4924 if (tree_int_cst_lt (t1
, t2
))
4926 else if (tree_int_cst_lt (t2
, t1
))
4932 /* Return 1 if T is an INTEGER_CST that can be manipulated efficiently on
4933 the host. If POS is zero, the value can be represented in a single
4934 HOST_WIDE_INT. If POS is nonzero, the value must be non-negative and can
4935 be represented in a single unsigned HOST_WIDE_INT. */
4938 host_integerp (const_tree t
, int pos
)
4940 return (TREE_CODE (t
) == INTEGER_CST
4941 && ((TREE_INT_CST_HIGH (t
) == 0
4942 && (HOST_WIDE_INT
) TREE_INT_CST_LOW (t
) >= 0)
4943 || (! pos
&& TREE_INT_CST_HIGH (t
) == -1
4944 && (HOST_WIDE_INT
) TREE_INT_CST_LOW (t
) < 0
4945 && (!TYPE_UNSIGNED (TREE_TYPE (t
))
4946 || TYPE_IS_SIZETYPE (TREE_TYPE (t
))))
4947 || (pos
&& TREE_INT_CST_HIGH (t
) == 0)));
4950 /* Return the HOST_WIDE_INT least significant bits of T if it is an
4951 INTEGER_CST and there is no overflow. POS is nonzero if the result must
4952 be non-negative. We must be able to satisfy the above conditions. */
4955 tree_low_cst (const_tree t
, int pos
)
4957 gcc_assert (host_integerp (t
, pos
));
4958 return TREE_INT_CST_LOW (t
);
4961 /* Return the most significant bit of the integer constant T. */
4964 tree_int_cst_msb (const_tree t
)
4968 unsigned HOST_WIDE_INT l
;
4970 /* Note that using TYPE_PRECISION here is wrong. We care about the
4971 actual bits, not the (arbitrary) range of the type. */
4972 prec
= GET_MODE_BITSIZE (TYPE_MODE (TREE_TYPE (t
))) - 1;
4973 rshift_double (TREE_INT_CST_LOW (t
), TREE_INT_CST_HIGH (t
), prec
,
4974 2 * HOST_BITS_PER_WIDE_INT
, &l
, &h
, 0);
4975 return (l
& 1) == 1;
4978 /* Return an indication of the sign of the integer constant T.
4979 The return value is -1 if T < 0, 0 if T == 0, and 1 if T > 0.
4980 Note that -1 will never be returned if T's type is unsigned. */
4983 tree_int_cst_sgn (const_tree t
)
4985 if (TREE_INT_CST_LOW (t
) == 0 && TREE_INT_CST_HIGH (t
) == 0)
4987 else if (TYPE_UNSIGNED (TREE_TYPE (t
)))
4989 else if (TREE_INT_CST_HIGH (t
) < 0)
4995 /* Compare two constructor-element-type constants. Return 1 if the lists
4996 are known to be equal; otherwise return 0. */
4999 simple_cst_list_equal (const_tree l1
, const_tree l2
)
5001 while (l1
!= NULL_TREE
&& l2
!= NULL_TREE
)
5003 if (simple_cst_equal (TREE_VALUE (l1
), TREE_VALUE (l2
)) != 1)
5006 l1
= TREE_CHAIN (l1
);
5007 l2
= TREE_CHAIN (l2
);
5013 /* Return truthvalue of whether T1 is the same tree structure as T2.
5014 Return 1 if they are the same.
5015 Return 0 if they are understandably different.
5016 Return -1 if either contains tree structure not understood by
5020 simple_cst_equal (const_tree t1
, const_tree t2
)
5022 enum tree_code code1
, code2
;
5028 if (t1
== 0 || t2
== 0)
5031 code1
= TREE_CODE (t1
);
5032 code2
= TREE_CODE (t2
);
5034 if (code1
== NOP_EXPR
|| code1
== CONVERT_EXPR
|| code1
== NON_LVALUE_EXPR
)
5036 if (code2
== NOP_EXPR
|| code2
== CONVERT_EXPR
5037 || code2
== NON_LVALUE_EXPR
)
5038 return simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
5040 return simple_cst_equal (TREE_OPERAND (t1
, 0), t2
);
5043 else if (code2
== NOP_EXPR
|| code2
== CONVERT_EXPR
5044 || code2
== NON_LVALUE_EXPR
)
5045 return simple_cst_equal (t1
, TREE_OPERAND (t2
, 0));
5053 return (TREE_INT_CST_LOW (t1
) == TREE_INT_CST_LOW (t2
)
5054 && TREE_INT_CST_HIGH (t1
) == TREE_INT_CST_HIGH (t2
));
5057 return REAL_VALUES_IDENTICAL (TREE_REAL_CST (t1
), TREE_REAL_CST (t2
));
5060 return FIXED_VALUES_IDENTICAL (TREE_FIXED_CST (t1
), TREE_FIXED_CST (t2
));
5063 return (TREE_STRING_LENGTH (t1
) == TREE_STRING_LENGTH (t2
)
5064 && ! memcmp (TREE_STRING_POINTER (t1
), TREE_STRING_POINTER (t2
),
5065 TREE_STRING_LENGTH (t1
)));
5069 unsigned HOST_WIDE_INT idx
;
5070 VEC(constructor_elt
, gc
) *v1
= CONSTRUCTOR_ELTS (t1
);
5071 VEC(constructor_elt
, gc
) *v2
= CONSTRUCTOR_ELTS (t2
);
5073 if (VEC_length (constructor_elt
, v1
) != VEC_length (constructor_elt
, v2
))
5076 for (idx
= 0; idx
< VEC_length (constructor_elt
, v1
); ++idx
)
5077 /* ??? Should we handle also fields here? */
5078 if (!simple_cst_equal (VEC_index (constructor_elt
, v1
, idx
)->value
,
5079 VEC_index (constructor_elt
, v2
, idx
)->value
))
5085 return simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
5088 cmp
= simple_cst_equal (CALL_EXPR_FN (t1
), CALL_EXPR_FN (t2
));
5091 if (call_expr_nargs (t1
) != call_expr_nargs (t2
))
5094 const_tree arg1
, arg2
;
5095 const_call_expr_arg_iterator iter1
, iter2
;
5096 for (arg1
= first_const_call_expr_arg (t1
, &iter1
),
5097 arg2
= first_const_call_expr_arg (t2
, &iter2
);
5099 arg1
= next_const_call_expr_arg (&iter1
),
5100 arg2
= next_const_call_expr_arg (&iter2
))
5102 cmp
= simple_cst_equal (arg1
, arg2
);
5106 return arg1
== arg2
;
5110 /* Special case: if either target is an unallocated VAR_DECL,
5111 it means that it's going to be unified with whatever the
5112 TARGET_EXPR is really supposed to initialize, so treat it
5113 as being equivalent to anything. */
5114 if ((TREE_CODE (TREE_OPERAND (t1
, 0)) == VAR_DECL
5115 && DECL_NAME (TREE_OPERAND (t1
, 0)) == NULL_TREE
5116 && !DECL_RTL_SET_P (TREE_OPERAND (t1
, 0)))
5117 || (TREE_CODE (TREE_OPERAND (t2
, 0)) == VAR_DECL
5118 && DECL_NAME (TREE_OPERAND (t2
, 0)) == NULL_TREE
5119 && !DECL_RTL_SET_P (TREE_OPERAND (t2
, 0))))
5122 cmp
= simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
5127 return simple_cst_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t2
, 1));
5129 case WITH_CLEANUP_EXPR
:
5130 cmp
= simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
5134 return simple_cst_equal (TREE_OPERAND (t1
, 1), TREE_OPERAND (t1
, 1));
5137 if (TREE_OPERAND (t1
, 1) == TREE_OPERAND (t2
, 1))
5138 return simple_cst_equal (TREE_OPERAND (t1
, 0), TREE_OPERAND (t2
, 0));
5152 /* This general rule works for most tree codes. All exceptions should be
5153 handled above. If this is a language-specific tree code, we can't
5154 trust what might be in the operand, so say we don't know
5156 if ((int) code1
>= (int) LAST_AND_UNUSED_TREE_CODE
)
5159 switch (TREE_CODE_CLASS (code1
))
5163 case tcc_comparison
:
5164 case tcc_expression
:
5168 for (i
= 0; i
< TREE_CODE_LENGTH (code1
); i
++)
5170 cmp
= simple_cst_equal (TREE_OPERAND (t1
, i
), TREE_OPERAND (t2
, i
));
5182 /* Compare the value of T, an INTEGER_CST, with U, an unsigned integer value.
5183 Return -1, 0, or 1 if the value of T is less than, equal to, or greater
5184 than U, respectively. */
5187 compare_tree_int (const_tree t
, unsigned HOST_WIDE_INT u
)
5189 if (tree_int_cst_sgn (t
) < 0)
5191 else if (TREE_INT_CST_HIGH (t
) != 0)
5193 else if (TREE_INT_CST_LOW (t
) == u
)
5195 else if (TREE_INT_CST_LOW (t
) < u
)
5201 /* Return true if CODE represents an associative tree code. Otherwise
5204 associative_tree_code (enum tree_code code
)
5223 /* Return true if CODE represents a commutative tree code. Otherwise
5226 commutative_tree_code (enum tree_code code
)
5239 case UNORDERED_EXPR
:
5243 case TRUTH_AND_EXPR
:
5244 case TRUTH_XOR_EXPR
:
5254 /* Generate a hash value for an expression. This can be used iteratively
5255 by passing a previous result as the "val" argument.
5257 This function is intended to produce the same hash for expressions which
5258 would compare equal using operand_equal_p. */
5261 iterative_hash_expr (const_tree t
, hashval_t val
)
5264 enum tree_code code
;
5268 return iterative_hash_pointer (t
, val
);
5270 code
= TREE_CODE (t
);
5274 /* Alas, constants aren't shared, so we can't rely on pointer
5277 val
= iterative_hash_host_wide_int (TREE_INT_CST_LOW (t
), val
);
5278 return iterative_hash_host_wide_int (TREE_INT_CST_HIGH (t
), val
);
5281 unsigned int val2
= real_hash (TREE_REAL_CST_PTR (t
));
5283 return iterative_hash_hashval_t (val2
, val
);
5287 unsigned int val2
= fixed_hash (TREE_FIXED_CST_PTR (t
));
5289 return iterative_hash_hashval_t (val2
, val
);
5292 return iterative_hash (TREE_STRING_POINTER (t
),
5293 TREE_STRING_LENGTH (t
), val
);
5295 val
= iterative_hash_expr (TREE_REALPART (t
), val
);
5296 return iterative_hash_expr (TREE_IMAGPART (t
), val
);
5298 return iterative_hash_expr (TREE_VECTOR_CST_ELTS (t
), val
);
5302 /* we can just compare by pointer. */
5303 return iterative_hash_pointer (t
, val
);
5306 /* A list of expressions, for a CALL_EXPR or as the elements of a
5308 for (; t
; t
= TREE_CHAIN (t
))
5309 val
= iterative_hash_expr (TREE_VALUE (t
), val
);
5313 unsigned HOST_WIDE_INT idx
;
5315 FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (t
), idx
, field
, value
)
5317 val
= iterative_hash_expr (field
, val
);
5318 val
= iterative_hash_expr (value
, val
);
5323 /* When referring to a built-in FUNCTION_DECL, use the
5324 __builtin__ form. Otherwise nodes that compare equal
5325 according to operand_equal_p might get different
5327 if (DECL_BUILT_IN (t
))
5329 val
= iterative_hash_pointer (built_in_decls
[DECL_FUNCTION_CODE (t
)],
5333 /* else FALL THROUGH */
5335 class = TREE_CODE_CLASS (code
);
5337 if (class == tcc_declaration
)
5339 /* DECL's have a unique ID */
5340 val
= iterative_hash_host_wide_int (DECL_UID (t
), val
);
5344 gcc_assert (IS_EXPR_CODE_CLASS (class));
5346 val
= iterative_hash_object (code
, val
);
5348 /* Don't hash the type, that can lead to having nodes which
5349 compare equal according to operand_equal_p, but which
5350 have different hash codes. */
5351 if (code
== NOP_EXPR
5352 || code
== CONVERT_EXPR
5353 || code
== NON_LVALUE_EXPR
)
5355 /* Make sure to include signness in the hash computation. */
5356 val
+= TYPE_UNSIGNED (TREE_TYPE (t
));
5357 val
= iterative_hash_expr (TREE_OPERAND (t
, 0), val
);
5360 else if (commutative_tree_code (code
))
5362 /* It's a commutative expression. We want to hash it the same
5363 however it appears. We do this by first hashing both operands
5364 and then rehashing based on the order of their independent
5366 hashval_t one
= iterative_hash_expr (TREE_OPERAND (t
, 0), 0);
5367 hashval_t two
= iterative_hash_expr (TREE_OPERAND (t
, 1), 0);
5371 t
= one
, one
= two
, two
= t
;
5373 val
= iterative_hash_hashval_t (one
, val
);
5374 val
= iterative_hash_hashval_t (two
, val
);
5377 for (i
= TREE_OPERAND_LENGTH (t
) - 1; i
>= 0; --i
)
5378 val
= iterative_hash_expr (TREE_OPERAND (t
, i
), val
);
5385 /* Constructors for pointer, array and function types.
5386 (RECORD_TYPE, UNION_TYPE and ENUMERAL_TYPE nodes are
5387 constructed by language-dependent code, not here.) */
5389 /* Construct, lay out and return the type of pointers to TO_TYPE with
5390 mode MODE. If CAN_ALIAS_ALL is TRUE, indicate this type can
5391 reference all of memory. If such a type has already been
5392 constructed, reuse it. */
5395 build_pointer_type_for_mode (tree to_type
, enum machine_mode mode
,
5400 if (to_type
== error_mark_node
)
5401 return error_mark_node
;
5403 /* In some cases, languages will have things that aren't a POINTER_TYPE
5404 (such as a RECORD_TYPE for fat pointers in Ada) as TYPE_POINTER_TO.
5405 In that case, return that type without regard to the rest of our
5408 ??? This is a kludge, but consistent with the way this function has
5409 always operated and there doesn't seem to be a good way to avoid this
5411 if (TYPE_POINTER_TO (to_type
) != 0
5412 && TREE_CODE (TYPE_POINTER_TO (to_type
)) != POINTER_TYPE
)
5413 return TYPE_POINTER_TO (to_type
);
5415 /* First, if we already have a type for pointers to TO_TYPE and it's
5416 the proper mode, use it. */
5417 for (t
= TYPE_POINTER_TO (to_type
); t
; t
= TYPE_NEXT_PTR_TO (t
))
5418 if (TYPE_MODE (t
) == mode
&& TYPE_REF_CAN_ALIAS_ALL (t
) == can_alias_all
)
5421 t
= make_node (POINTER_TYPE
);
5423 TREE_TYPE (t
) = to_type
;
5424 TYPE_MODE (t
) = mode
;
5425 TYPE_REF_CAN_ALIAS_ALL (t
) = can_alias_all
;
5426 TYPE_NEXT_PTR_TO (t
) = TYPE_POINTER_TO (to_type
);
5427 TYPE_POINTER_TO (to_type
) = t
;
5429 if (TYPE_STRUCTURAL_EQUALITY_P (to_type
))
5430 SET_TYPE_STRUCTURAL_EQUALITY (t
);
5431 else if (TYPE_CANONICAL (to_type
) != to_type
)
5433 = build_pointer_type_for_mode (TYPE_CANONICAL (to_type
),
5434 mode
, can_alias_all
);
5436 /* Lay out the type. This function has many callers that are concerned
5437 with expression-construction, and this simplifies them all. */
5443 /* By default build pointers in ptr_mode. */
5446 build_pointer_type (tree to_type
)
5448 return build_pointer_type_for_mode (to_type
, ptr_mode
, false);
5451 /* Same as build_pointer_type_for_mode, but for REFERENCE_TYPE. */
5454 build_reference_type_for_mode (tree to_type
, enum machine_mode mode
,
5459 /* In some cases, languages will have things that aren't a REFERENCE_TYPE
5460 (such as a RECORD_TYPE for fat pointers in Ada) as TYPE_REFERENCE_TO.
5461 In that case, return that type without regard to the rest of our
5464 ??? This is a kludge, but consistent with the way this function has
5465 always operated and there doesn't seem to be a good way to avoid this
5467 if (TYPE_REFERENCE_TO (to_type
) != 0
5468 && TREE_CODE (TYPE_REFERENCE_TO (to_type
)) != REFERENCE_TYPE
)
5469 return TYPE_REFERENCE_TO (to_type
);
5471 /* First, if we already have a type for pointers to TO_TYPE and it's
5472 the proper mode, use it. */
5473 for (t
= TYPE_REFERENCE_TO (to_type
); t
; t
= TYPE_NEXT_REF_TO (t
))
5474 if (TYPE_MODE (t
) == mode
&& TYPE_REF_CAN_ALIAS_ALL (t
) == can_alias_all
)
5477 t
= make_node (REFERENCE_TYPE
);
5479 TREE_TYPE (t
) = to_type
;
5480 TYPE_MODE (t
) = mode
;
5481 TYPE_REF_CAN_ALIAS_ALL (t
) = can_alias_all
;
5482 TYPE_NEXT_REF_TO (t
) = TYPE_REFERENCE_TO (to_type
);
5483 TYPE_REFERENCE_TO (to_type
) = t
;
5485 if (TYPE_STRUCTURAL_EQUALITY_P (to_type
))
5486 SET_TYPE_STRUCTURAL_EQUALITY (t
);
5487 else if (TYPE_CANONICAL (to_type
) != to_type
)
5489 = build_reference_type_for_mode (TYPE_CANONICAL (to_type
),
5490 mode
, can_alias_all
);
5498 /* Build the node for the type of references-to-TO_TYPE by default
5502 build_reference_type (tree to_type
)
5504 return build_reference_type_for_mode (to_type
, ptr_mode
, false);
5507 /* Build a type that is compatible with t but has no cv quals anywhere
5510 const char *const *const * -> char ***. */
5513 build_type_no_quals (tree t
)
5515 switch (TREE_CODE (t
))
5518 return build_pointer_type_for_mode (build_type_no_quals (TREE_TYPE (t
)),
5520 TYPE_REF_CAN_ALIAS_ALL (t
));
5521 case REFERENCE_TYPE
:
5523 build_reference_type_for_mode (build_type_no_quals (TREE_TYPE (t
)),
5525 TYPE_REF_CAN_ALIAS_ALL (t
));
5527 return TYPE_MAIN_VARIANT (t
);
5531 /* Create a type of integers to be the TYPE_DOMAIN of an ARRAY_TYPE.
5532 MAXVAL should be the maximum value in the domain
5533 (one less than the length of the array).
5535 The maximum value that MAXVAL can have is INT_MAX for a HOST_WIDE_INT.
5536 We don't enforce this limit, that is up to caller (e.g. language front end).
5537 The limit exists because the result is a signed type and we don't handle
5538 sizes that use more than one HOST_WIDE_INT. */
5541 build_index_type (tree maxval
)
5543 tree itype
= make_node (INTEGER_TYPE
);
5545 TREE_TYPE (itype
) = sizetype
;
5546 TYPE_PRECISION (itype
) = TYPE_PRECISION (sizetype
);
5547 TYPE_MIN_VALUE (itype
) = size_zero_node
;
5548 TYPE_MAX_VALUE (itype
) = fold_convert (sizetype
, maxval
);
5549 TYPE_MODE (itype
) = TYPE_MODE (sizetype
);
5550 TYPE_SIZE (itype
) = TYPE_SIZE (sizetype
);
5551 TYPE_SIZE_UNIT (itype
) = TYPE_SIZE_UNIT (sizetype
);
5552 TYPE_ALIGN (itype
) = TYPE_ALIGN (sizetype
);
5553 TYPE_USER_ALIGN (itype
) = TYPE_USER_ALIGN (sizetype
);
5555 if (host_integerp (maxval
, 1))
5556 return type_hash_canon (tree_low_cst (maxval
, 1), itype
);
5559 /* Since we cannot hash this type, we need to compare it using
5560 structural equality checks. */
5561 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
5566 /* Builds a signed or unsigned integer type of precision PRECISION.
5567 Used for C bitfields whose precision does not match that of
5568 built-in target types. */
5570 build_nonstandard_integer_type (unsigned HOST_WIDE_INT precision
,
5573 tree itype
= make_node (INTEGER_TYPE
);
5575 TYPE_PRECISION (itype
) = precision
;
5578 fixup_unsigned_type (itype
);
5580 fixup_signed_type (itype
);
5582 if (host_integerp (TYPE_MAX_VALUE (itype
), 1))
5583 return type_hash_canon (tree_low_cst (TYPE_MAX_VALUE (itype
), 1), itype
);
5588 /* Create a range of some discrete type TYPE (an INTEGER_TYPE,
5589 ENUMERAL_TYPE or BOOLEAN_TYPE), with low bound LOWVAL and
5590 high bound HIGHVAL. If TYPE is NULL, sizetype is used. */
5593 build_range_type (tree type
, tree lowval
, tree highval
)
5595 tree itype
= make_node (INTEGER_TYPE
);
5597 TREE_TYPE (itype
) = type
;
5598 if (type
== NULL_TREE
)
5601 TYPE_MIN_VALUE (itype
) = fold_convert (type
, lowval
);
5602 TYPE_MAX_VALUE (itype
) = highval
? fold_convert (type
, highval
) : NULL
;
5604 TYPE_PRECISION (itype
) = TYPE_PRECISION (type
);
5605 TYPE_MODE (itype
) = TYPE_MODE (type
);
5606 TYPE_SIZE (itype
) = TYPE_SIZE (type
);
5607 TYPE_SIZE_UNIT (itype
) = TYPE_SIZE_UNIT (type
);
5608 TYPE_ALIGN (itype
) = TYPE_ALIGN (type
);
5609 TYPE_USER_ALIGN (itype
) = TYPE_USER_ALIGN (type
);
5611 if (host_integerp (lowval
, 0) && highval
!= 0 && host_integerp (highval
, 0))
5612 return type_hash_canon (tree_low_cst (highval
, 0)
5613 - tree_low_cst (lowval
, 0),
5619 /* Just like build_index_type, but takes lowval and highval instead
5620 of just highval (maxval). */
5623 build_index_2_type (tree lowval
, tree highval
)
5625 return build_range_type (sizetype
, lowval
, highval
);
5628 /* Construct, lay out and return the type of arrays of elements with ELT_TYPE
5629 and number of elements specified by the range of values of INDEX_TYPE.
5630 If such a type has already been constructed, reuse it. */
5633 build_array_type (tree elt_type
, tree index_type
)
5636 hashval_t hashcode
= 0;
5638 if (TREE_CODE (elt_type
) == FUNCTION_TYPE
)
5640 error ("arrays of functions are not meaningful");
5641 elt_type
= integer_type_node
;
5644 t
= make_node (ARRAY_TYPE
);
5645 TREE_TYPE (t
) = elt_type
;
5646 TYPE_DOMAIN (t
) = index_type
;
5648 if (index_type
== 0)
5651 hashcode
= iterative_hash_object (TYPE_HASH (elt_type
), hashcode
);
5652 t
= type_hash_canon (hashcode
, t
);
5656 if (TYPE_CANONICAL (t
) == t
)
5658 if (TYPE_STRUCTURAL_EQUALITY_P (elt_type
))
5659 SET_TYPE_STRUCTURAL_EQUALITY (t
);
5660 else if (TYPE_CANONICAL (elt_type
) != elt_type
)
5662 = build_array_type (TYPE_CANONICAL (elt_type
), index_type
);
5668 hashcode
= iterative_hash_object (TYPE_HASH (elt_type
), hashcode
);
5669 hashcode
= iterative_hash_object (TYPE_HASH (index_type
), hashcode
);
5670 t
= type_hash_canon (hashcode
, t
);
5672 if (!COMPLETE_TYPE_P (t
))
5675 if (TYPE_CANONICAL (t
) == t
)
5677 if (TYPE_STRUCTURAL_EQUALITY_P (elt_type
)
5678 || TYPE_STRUCTURAL_EQUALITY_P (index_type
))
5679 SET_TYPE_STRUCTURAL_EQUALITY (t
);
5680 else if (TYPE_CANONICAL (elt_type
) != elt_type
5681 || TYPE_CANONICAL (index_type
) != index_type
)
5683 = build_array_type (TYPE_CANONICAL (elt_type
),
5684 TYPE_CANONICAL (index_type
));
5690 /* Return the TYPE of the elements comprising
5691 the innermost dimension of ARRAY. */
5694 get_inner_array_type (const_tree array
)
5696 tree type
= TREE_TYPE (array
);
5698 while (TREE_CODE (type
) == ARRAY_TYPE
)
5699 type
= TREE_TYPE (type
);
5704 /* Computes the canonical argument types from the argument type list
5707 Upon return, *ANY_STRUCTURAL_P will be true iff either it was true
5708 on entry to this function, or if any of the ARGTYPES are
5711 Upon return, *ANY_NONCANONICAL_P will be true iff either it was
5712 true on entry to this function, or if any of the ARGTYPES are
5715 Returns a canonical argument list, which may be ARGTYPES when the
5716 canonical argument list is unneeded (i.e., *ANY_STRUCTURAL_P is
5717 true) or would not differ from ARGTYPES. */
5720 maybe_canonicalize_argtypes(tree argtypes
,
5721 bool *any_structural_p
,
5722 bool *any_noncanonical_p
)
5725 bool any_noncanonical_argtypes_p
= false;
5727 for (arg
= argtypes
; arg
&& !(*any_structural_p
); arg
= TREE_CHAIN (arg
))
5729 if (!TREE_VALUE (arg
) || TREE_VALUE (arg
) == error_mark_node
)
5730 /* Fail gracefully by stating that the type is structural. */
5731 *any_structural_p
= true;
5732 else if (TYPE_STRUCTURAL_EQUALITY_P (TREE_VALUE (arg
)))
5733 *any_structural_p
= true;
5734 else if (TYPE_CANONICAL (TREE_VALUE (arg
)) != TREE_VALUE (arg
)
5735 || TREE_PURPOSE (arg
))
5736 /* If the argument has a default argument, we consider it
5737 non-canonical even though the type itself is canonical.
5738 That way, different variants of function and method types
5739 with default arguments will all point to the variant with
5740 no defaults as their canonical type. */
5741 any_noncanonical_argtypes_p
= true;
5744 if (*any_structural_p
)
5747 if (any_noncanonical_argtypes_p
)
5749 /* Build the canonical list of argument types. */
5750 tree canon_argtypes
= NULL_TREE
;
5751 bool is_void
= false;
5753 for (arg
= argtypes
; arg
; arg
= TREE_CHAIN (arg
))
5755 if (arg
== void_list_node
)
5758 canon_argtypes
= tree_cons (NULL_TREE
,
5759 TYPE_CANONICAL (TREE_VALUE (arg
)),
5763 canon_argtypes
= nreverse (canon_argtypes
);
5765 canon_argtypes
= chainon (canon_argtypes
, void_list_node
);
5767 /* There is a non-canonical type. */
5768 *any_noncanonical_p
= true;
5769 return canon_argtypes
;
5772 /* The canonical argument types are the same as ARGTYPES. */
5776 /* Construct, lay out and return
5777 the type of functions returning type VALUE_TYPE
5778 given arguments of types ARG_TYPES.
5779 ARG_TYPES is a chain of TREE_LIST nodes whose TREE_VALUEs
5780 are data type nodes for the arguments of the function.
5781 If such a type has already been constructed, reuse it. */
5784 build_function_type (tree value_type
, tree arg_types
)
5787 hashval_t hashcode
= 0;
5788 bool any_structural_p
, any_noncanonical_p
;
5789 tree canon_argtypes
;
5791 if (TREE_CODE (value_type
) == FUNCTION_TYPE
)
5793 error ("function return type cannot be function");
5794 value_type
= integer_type_node
;
5797 /* Make a node of the sort we want. */
5798 t
= make_node (FUNCTION_TYPE
);
5799 TREE_TYPE (t
) = value_type
;
5800 TYPE_ARG_TYPES (t
) = arg_types
;
5802 /* If we already have such a type, use the old one. */
5803 hashcode
= iterative_hash_object (TYPE_HASH (value_type
), hashcode
);
5804 hashcode
= type_hash_list (arg_types
, hashcode
);
5805 t
= type_hash_canon (hashcode
, t
);
5807 /* Set up the canonical type. */
5808 any_structural_p
= TYPE_STRUCTURAL_EQUALITY_P (value_type
);
5809 any_noncanonical_p
= TYPE_CANONICAL (value_type
) != value_type
;
5810 canon_argtypes
= maybe_canonicalize_argtypes (arg_types
,
5812 &any_noncanonical_p
);
5813 if (any_structural_p
)
5814 SET_TYPE_STRUCTURAL_EQUALITY (t
);
5815 else if (any_noncanonical_p
)
5816 TYPE_CANONICAL (t
) = build_function_type (TYPE_CANONICAL (value_type
),
5819 if (!COMPLETE_TYPE_P (t
))
5824 /* Build a function type. The RETURN_TYPE is the type returned by the
5825 function. If additional arguments are provided, they are
5826 additional argument types. The list of argument types must always
5827 be terminated by NULL_TREE. */
5830 build_function_type_list (tree return_type
, ...)
5835 va_start (p
, return_type
);
5837 t
= va_arg (p
, tree
);
5838 for (args
= NULL_TREE
; t
!= NULL_TREE
; t
= va_arg (p
, tree
))
5839 args
= tree_cons (NULL_TREE
, t
, args
);
5841 if (args
== NULL_TREE
)
5842 args
= void_list_node
;
5846 args
= nreverse (args
);
5847 TREE_CHAIN (last
) = void_list_node
;
5849 args
= build_function_type (return_type
, args
);
5855 /* Build a METHOD_TYPE for a member of BASETYPE. The RETTYPE (a TYPE)
5856 and ARGTYPES (a TREE_LIST) are the return type and arguments types
5857 for the method. An implicit additional parameter (of type
5858 pointer-to-BASETYPE) is added to the ARGTYPES. */
5861 build_method_type_directly (tree basetype
,
5868 bool any_structural_p
, any_noncanonical_p
;
5869 tree canon_argtypes
;
5871 /* Make a node of the sort we want. */
5872 t
= make_node (METHOD_TYPE
);
5874 TYPE_METHOD_BASETYPE (t
) = TYPE_MAIN_VARIANT (basetype
);
5875 TREE_TYPE (t
) = rettype
;
5876 ptype
= build_pointer_type (basetype
);
5878 /* The actual arglist for this function includes a "hidden" argument
5879 which is "this". Put it into the list of argument types. */
5880 argtypes
= tree_cons (NULL_TREE
, ptype
, argtypes
);
5881 TYPE_ARG_TYPES (t
) = argtypes
;
5883 /* If we already have such a type, use the old one. */
5884 hashcode
= iterative_hash_object (TYPE_HASH (basetype
), hashcode
);
5885 hashcode
= iterative_hash_object (TYPE_HASH (rettype
), hashcode
);
5886 hashcode
= type_hash_list (argtypes
, hashcode
);
5887 t
= type_hash_canon (hashcode
, t
);
5889 /* Set up the canonical type. */
5891 = (TYPE_STRUCTURAL_EQUALITY_P (basetype
)
5892 || TYPE_STRUCTURAL_EQUALITY_P (rettype
));
5894 = (TYPE_CANONICAL (basetype
) != basetype
5895 || TYPE_CANONICAL (rettype
) != rettype
);
5896 canon_argtypes
= maybe_canonicalize_argtypes (TREE_CHAIN (argtypes
),
5898 &any_noncanonical_p
);
5899 if (any_structural_p
)
5900 SET_TYPE_STRUCTURAL_EQUALITY (t
);
5901 else if (any_noncanonical_p
)
5903 = build_method_type_directly (TYPE_CANONICAL (basetype
),
5904 TYPE_CANONICAL (rettype
),
5906 if (!COMPLETE_TYPE_P (t
))
5912 /* Construct, lay out and return the type of methods belonging to class
5913 BASETYPE and whose arguments and values are described by TYPE.
5914 If that type exists already, reuse it.
5915 TYPE must be a FUNCTION_TYPE node. */
5918 build_method_type (tree basetype
, tree type
)
5920 gcc_assert (TREE_CODE (type
) == FUNCTION_TYPE
);
5922 return build_method_type_directly (basetype
,
5924 TYPE_ARG_TYPES (type
));
5927 /* Construct, lay out and return the type of offsets to a value
5928 of type TYPE, within an object of type BASETYPE.
5929 If a suitable offset type exists already, reuse it. */
5932 build_offset_type (tree basetype
, tree type
)
5935 hashval_t hashcode
= 0;
5937 /* Make a node of the sort we want. */
5938 t
= make_node (OFFSET_TYPE
);
5940 TYPE_OFFSET_BASETYPE (t
) = TYPE_MAIN_VARIANT (basetype
);
5941 TREE_TYPE (t
) = type
;
5943 /* If we already have such a type, use the old one. */
5944 hashcode
= iterative_hash_object (TYPE_HASH (basetype
), hashcode
);
5945 hashcode
= iterative_hash_object (TYPE_HASH (type
), hashcode
);
5946 t
= type_hash_canon (hashcode
, t
);
5948 if (!COMPLETE_TYPE_P (t
))
5951 if (TYPE_CANONICAL (t
) == t
)
5953 if (TYPE_STRUCTURAL_EQUALITY_P (basetype
)
5954 || TYPE_STRUCTURAL_EQUALITY_P (type
))
5955 SET_TYPE_STRUCTURAL_EQUALITY (t
);
5956 else if (TYPE_CANONICAL (basetype
) != basetype
5957 || TYPE_CANONICAL (type
) != type
)
5959 = build_offset_type (TYPE_CANONICAL (basetype
),
5960 TYPE_CANONICAL (type
));
5966 /* Create a complex type whose components are COMPONENT_TYPE. */
5969 build_complex_type (tree component_type
)
5974 /* Make a node of the sort we want. */
5975 t
= make_node (COMPLEX_TYPE
);
5977 TREE_TYPE (t
) = TYPE_MAIN_VARIANT (component_type
);
5979 /* If we already have such a type, use the old one. */
5980 hashcode
= iterative_hash_object (TYPE_HASH (component_type
), 0);
5981 t
= type_hash_canon (hashcode
, t
);
5983 if (!COMPLETE_TYPE_P (t
))
5986 if (TYPE_CANONICAL (t
) == t
)
5988 if (TYPE_STRUCTURAL_EQUALITY_P (component_type
))
5989 SET_TYPE_STRUCTURAL_EQUALITY (t
);
5990 else if (TYPE_CANONICAL (component_type
) != component_type
)
5992 = build_complex_type (TYPE_CANONICAL (component_type
));
5995 /* We need to create a name, since complex is a fundamental type. */
5996 if (! TYPE_NAME (t
))
5999 if (component_type
== char_type_node
)
6000 name
= "complex char";
6001 else if (component_type
== signed_char_type_node
)
6002 name
= "complex signed char";
6003 else if (component_type
== unsigned_char_type_node
)
6004 name
= "complex unsigned char";
6005 else if (component_type
== short_integer_type_node
)
6006 name
= "complex short int";
6007 else if (component_type
== short_unsigned_type_node
)
6008 name
= "complex short unsigned int";
6009 else if (component_type
== integer_type_node
)
6010 name
= "complex int";
6011 else if (component_type
== unsigned_type_node
)
6012 name
= "complex unsigned int";
6013 else if (component_type
== long_integer_type_node
)
6014 name
= "complex long int";
6015 else if (component_type
== long_unsigned_type_node
)
6016 name
= "complex long unsigned int";
6017 else if (component_type
== long_long_integer_type_node
)
6018 name
= "complex long long int";
6019 else if (component_type
== long_long_unsigned_type_node
)
6020 name
= "complex long long unsigned int";
6025 TYPE_NAME (t
) = build_decl (TYPE_DECL
, get_identifier (name
), t
);
6028 return build_qualified_type (t
, TYPE_QUALS (component_type
));
6031 /* Return OP, stripped of any conversions to wider types as much as is safe.
6032 Converting the value back to OP's type makes a value equivalent to OP.
6034 If FOR_TYPE is nonzero, we return a value which, if converted to
6035 type FOR_TYPE, would be equivalent to converting OP to type FOR_TYPE.
6037 If FOR_TYPE is nonzero, unaligned bit-field references may be changed to the
6038 narrowest type that can hold the value, even if they don't exactly fit.
6039 Otherwise, bit-field references are changed to a narrower type
6040 only if they can be fetched directly from memory in that type.
6042 OP must have integer, real or enumeral type. Pointers are not allowed!
6044 There are some cases where the obvious value we could return
6045 would regenerate to OP if converted to OP's type,
6046 but would not extend like OP to wider types.
6047 If FOR_TYPE indicates such extension is contemplated, we eschew such values.
6048 For example, if OP is (unsigned short)(signed char)-1,
6049 we avoid returning (signed char)-1 if FOR_TYPE is int,
6050 even though extending that to an unsigned short would regenerate OP,
6051 since the result of extending (signed char)-1 to (int)
6052 is different from (int) OP. */
6055 get_unwidened (tree op
, tree for_type
)
6057 /* Set UNS initially if converting OP to FOR_TYPE is a zero-extension. */
6058 tree type
= TREE_TYPE (op
);
6060 = TYPE_PRECISION (for_type
!= 0 ? for_type
: type
);
6062 = (for_type
!= 0 && for_type
!= type
6063 && final_prec
> TYPE_PRECISION (type
)
6064 && TYPE_UNSIGNED (type
));
6067 while (TREE_CODE (op
) == NOP_EXPR
6068 || TREE_CODE (op
) == CONVERT_EXPR
)
6072 /* TYPE_PRECISION on vector types has different meaning
6073 (TYPE_VECTOR_SUBPARTS) and casts from vectors are view conversions,
6074 so avoid them here. */
6075 if (TREE_CODE (TREE_TYPE (TREE_OPERAND (op
, 0))) == VECTOR_TYPE
)
6078 bitschange
= TYPE_PRECISION (TREE_TYPE (op
))
6079 - TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (op
, 0)));
6081 /* Truncations are many-one so cannot be removed.
6082 Unless we are later going to truncate down even farther. */
6084 && final_prec
> TYPE_PRECISION (TREE_TYPE (op
)))
6087 /* See what's inside this conversion. If we decide to strip it,
6089 op
= TREE_OPERAND (op
, 0);
6091 /* If we have not stripped any zero-extensions (uns is 0),
6092 we can strip any kind of extension.
6093 If we have previously stripped a zero-extension,
6094 only zero-extensions can safely be stripped.
6095 Any extension can be stripped if the bits it would produce
6096 are all going to be discarded later by truncating to FOR_TYPE. */
6100 if (! uns
|| final_prec
<= TYPE_PRECISION (TREE_TYPE (op
)))
6102 /* TYPE_UNSIGNED says whether this is a zero-extension.
6103 Let's avoid computing it if it does not affect WIN
6104 and if UNS will not be needed again. */
6106 || TREE_CODE (op
) == NOP_EXPR
6107 || TREE_CODE (op
) == CONVERT_EXPR
)
6108 && TYPE_UNSIGNED (TREE_TYPE (op
)))
6116 if (TREE_CODE (op
) == COMPONENT_REF
6117 /* Since type_for_size always gives an integer type. */
6118 && TREE_CODE (type
) != REAL_TYPE
6119 && TREE_CODE (type
) != FIXED_POINT_TYPE
6120 /* Don't crash if field not laid out yet. */
6121 && DECL_SIZE (TREE_OPERAND (op
, 1)) != 0
6122 && host_integerp (DECL_SIZE (TREE_OPERAND (op
, 1)), 1))
6124 unsigned int innerprec
6125 = tree_low_cst (DECL_SIZE (TREE_OPERAND (op
, 1)), 1);
6126 int unsignedp
= (DECL_UNSIGNED (TREE_OPERAND (op
, 1))
6127 || TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (op
, 1))));
6128 type
= lang_hooks
.types
.type_for_size (innerprec
, unsignedp
);
6130 /* We can get this structure field in the narrowest type it fits in.
6131 If FOR_TYPE is 0, do this only for a field that matches the
6132 narrower type exactly and is aligned for it
6133 The resulting extension to its nominal type (a fullword type)
6134 must fit the same conditions as for other extensions. */
6137 && INT_CST_LT_UNSIGNED (TYPE_SIZE (type
), TYPE_SIZE (TREE_TYPE (op
)))
6138 && (for_type
|| ! DECL_BIT_FIELD (TREE_OPERAND (op
, 1)))
6139 && (! uns
|| final_prec
<= innerprec
|| unsignedp
))
6141 win
= build3 (COMPONENT_REF
, type
, TREE_OPERAND (op
, 0),
6142 TREE_OPERAND (op
, 1), NULL_TREE
);
6143 TREE_SIDE_EFFECTS (win
) = TREE_SIDE_EFFECTS (op
);
6144 TREE_THIS_VOLATILE (win
) = TREE_THIS_VOLATILE (op
);
6151 /* Return OP or a simpler expression for a narrower value
6152 which can be sign-extended or zero-extended to give back OP.
6153 Store in *UNSIGNEDP_PTR either 1 if the value should be zero-extended
6154 or 0 if the value should be sign-extended. */
6157 get_narrower (tree op
, int *unsignedp_ptr
)
6162 bool integral_p
= INTEGRAL_TYPE_P (TREE_TYPE (op
));
6164 while (TREE_CODE (op
) == NOP_EXPR
)
6167 = (TYPE_PRECISION (TREE_TYPE (op
))
6168 - TYPE_PRECISION (TREE_TYPE (TREE_OPERAND (op
, 0))));
6170 /* Truncations are many-one so cannot be removed. */
6174 /* See what's inside this conversion. If we decide to strip it,
6179 op
= TREE_OPERAND (op
, 0);
6180 /* An extension: the outermost one can be stripped,
6181 but remember whether it is zero or sign extension. */
6183 uns
= TYPE_UNSIGNED (TREE_TYPE (op
));
6184 /* Otherwise, if a sign extension has been stripped,
6185 only sign extensions can now be stripped;
6186 if a zero extension has been stripped, only zero-extensions. */
6187 else if (uns
!= TYPE_UNSIGNED (TREE_TYPE (op
)))
6191 else /* bitschange == 0 */
6193 /* A change in nominal type can always be stripped, but we must
6194 preserve the unsignedness. */
6196 uns
= TYPE_UNSIGNED (TREE_TYPE (op
));
6198 op
= TREE_OPERAND (op
, 0);
6199 /* Keep trying to narrow, but don't assign op to win if it
6200 would turn an integral type into something else. */
6201 if (INTEGRAL_TYPE_P (TREE_TYPE (op
)) != integral_p
)
6208 if (TREE_CODE (op
) == COMPONENT_REF
6209 /* Since type_for_size always gives an integer type. */
6210 && TREE_CODE (TREE_TYPE (op
)) != REAL_TYPE
6211 && TREE_CODE (TREE_TYPE (op
)) != FIXED_POINT_TYPE
6212 /* Ensure field is laid out already. */
6213 && DECL_SIZE (TREE_OPERAND (op
, 1)) != 0
6214 && host_integerp (DECL_SIZE (TREE_OPERAND (op
, 1)), 1))
6216 unsigned HOST_WIDE_INT innerprec
6217 = tree_low_cst (DECL_SIZE (TREE_OPERAND (op
, 1)), 1);
6218 int unsignedp
= (DECL_UNSIGNED (TREE_OPERAND (op
, 1))
6219 || TYPE_UNSIGNED (TREE_TYPE (TREE_OPERAND (op
, 1))));
6220 tree type
= lang_hooks
.types
.type_for_size (innerprec
, unsignedp
);
6222 /* We can get this structure field in a narrower type that fits it,
6223 but the resulting extension to its nominal type (a fullword type)
6224 must satisfy the same conditions as for other extensions.
6226 Do this only for fields that are aligned (not bit-fields),
6227 because when bit-field insns will be used there is no
6228 advantage in doing this. */
6230 if (innerprec
< TYPE_PRECISION (TREE_TYPE (op
))
6231 && ! DECL_BIT_FIELD (TREE_OPERAND (op
, 1))
6232 && (first
|| uns
== DECL_UNSIGNED (TREE_OPERAND (op
, 1)))
6236 uns
= DECL_UNSIGNED (TREE_OPERAND (op
, 1));
6237 win
= fold_convert (type
, op
);
6241 *unsignedp_ptr
= uns
;
6245 /* Nonzero if integer constant C has a value that is permissible
6246 for type TYPE (an INTEGER_TYPE). */
6249 int_fits_type_p (const_tree c
, const_tree type
)
6251 tree type_low_bound
= TYPE_MIN_VALUE (type
);
6252 tree type_high_bound
= TYPE_MAX_VALUE (type
);
6253 bool ok_for_low_bound
, ok_for_high_bound
;
6254 unsigned HOST_WIDE_INT low
;
6257 /* If at least one bound of the type is a constant integer, we can check
6258 ourselves and maybe make a decision. If no such decision is possible, but
6259 this type is a subtype, try checking against that. Otherwise, use
6260 fit_double_type, which checks against the precision.
6262 Compute the status for each possibly constant bound, and return if we see
6263 one does not match. Use ok_for_xxx_bound for this purpose, assigning -1
6264 for "unknown if constant fits", 0 for "constant known *not* to fit" and 1
6265 for "constant known to fit". */
6267 /* Check if C >= type_low_bound. */
6268 if (type_low_bound
&& TREE_CODE (type_low_bound
) == INTEGER_CST
)
6270 if (tree_int_cst_lt (c
, type_low_bound
))
6272 ok_for_low_bound
= true;
6275 ok_for_low_bound
= false;
6277 /* Check if c <= type_high_bound. */
6278 if (type_high_bound
&& TREE_CODE (type_high_bound
) == INTEGER_CST
)
6280 if (tree_int_cst_lt (type_high_bound
, c
))
6282 ok_for_high_bound
= true;
6285 ok_for_high_bound
= false;
6287 /* If the constant fits both bounds, the result is known. */
6288 if (ok_for_low_bound
&& ok_for_high_bound
)
6291 /* Perform some generic filtering which may allow making a decision
6292 even if the bounds are not constant. First, negative integers
6293 never fit in unsigned types, */
6294 if (TYPE_UNSIGNED (type
) && tree_int_cst_sgn (c
) < 0)
6297 /* Second, narrower types always fit in wider ones. */
6298 if (TYPE_PRECISION (type
) > TYPE_PRECISION (TREE_TYPE (c
)))
6301 /* Third, unsigned integers with top bit set never fit signed types. */
6302 if (! TYPE_UNSIGNED (type
)
6303 && TYPE_UNSIGNED (TREE_TYPE (c
))
6304 && tree_int_cst_msb (c
))
6307 /* If we haven't been able to decide at this point, there nothing more we
6308 can check ourselves here. Look at the base type if we have one and it
6309 has the same precision. */
6310 if (TREE_CODE (type
) == INTEGER_TYPE
6311 && TREE_TYPE (type
) != 0
6312 && TYPE_PRECISION (type
) == TYPE_PRECISION (TREE_TYPE (type
)))
6313 return int_fits_type_p (c
, TREE_TYPE (type
));
6315 /* Or to fit_double_type, if nothing else. */
6316 low
= TREE_INT_CST_LOW (c
);
6317 high
= TREE_INT_CST_HIGH (c
);
6318 return !fit_double_type (low
, high
, &low
, &high
, type
);
6321 /* Stores bounds of an integer TYPE in MIN and MAX. If TYPE has non-constant
6322 bounds or is a POINTER_TYPE, the maximum and/or minimum values that can be
6323 represented (assuming two's-complement arithmetic) within the bit
6324 precision of the type are returned instead. */
6327 get_type_static_bounds (const_tree type
, mpz_t min
, mpz_t max
)
6329 if (!POINTER_TYPE_P (type
) && TYPE_MIN_VALUE (type
)
6330 && TREE_CODE (TYPE_MIN_VALUE (type
)) == INTEGER_CST
)
6331 mpz_set_double_int (min
, tree_to_double_int (TYPE_MIN_VALUE (type
)),
6332 TYPE_UNSIGNED (type
));
6335 if (TYPE_UNSIGNED (type
))
6336 mpz_set_ui (min
, 0);
6340 mn
= double_int_mask (TYPE_PRECISION (type
) - 1);
6341 mn
= double_int_sext (double_int_add (mn
, double_int_one
),
6342 TYPE_PRECISION (type
));
6343 mpz_set_double_int (min
, mn
, false);
6347 if (!POINTER_TYPE_P (type
) && TYPE_MAX_VALUE (type
)
6348 && TREE_CODE (TYPE_MAX_VALUE (type
)) == INTEGER_CST
)
6349 mpz_set_double_int (max
, tree_to_double_int (TYPE_MAX_VALUE (type
)),
6350 TYPE_UNSIGNED (type
));
6353 if (TYPE_UNSIGNED (type
))
6354 mpz_set_double_int (max
, double_int_mask (TYPE_PRECISION (type
)),
6357 mpz_set_double_int (max
, double_int_mask (TYPE_PRECISION (type
) - 1),
6362 /* auto_var_in_fn_p is called to determine whether VAR is an automatic
6363 variable defined in function FN. */
6366 auto_var_in_fn_p (const_tree var
, const_tree fn
)
6368 return (DECL_P (var
) && DECL_CONTEXT (var
) == fn
6369 && (((TREE_CODE (var
) == VAR_DECL
|| TREE_CODE (var
) == PARM_DECL
)
6370 && ! TREE_STATIC (var
))
6371 || TREE_CODE (var
) == LABEL_DECL
6372 || TREE_CODE (var
) == RESULT_DECL
));
6375 /* Subprogram of following function. Called by walk_tree.
6377 Return *TP if it is an automatic variable or parameter of the
6378 function passed in as DATA. */
6381 find_var_from_fn (tree
*tp
, int *walk_subtrees
, void *data
)
6383 tree fn
= (tree
) data
;
6388 else if (DECL_P (*tp
)
6389 && auto_var_in_fn_p (*tp
, fn
))
6395 /* Returns true if T is, contains, or refers to a type with variable
6396 size. For METHOD_TYPEs and FUNCTION_TYPEs we exclude the
6397 arguments, but not the return type. If FN is nonzero, only return
6398 true if a modifier of the type or position of FN is a variable or
6399 parameter inside FN.
6401 This concept is more general than that of C99 'variably modified types':
6402 in C99, a struct type is never variably modified because a VLA may not
6403 appear as a structure member. However, in GNU C code like:
6405 struct S { int i[f()]; };
6407 is valid, and other languages may define similar constructs. */
6410 variably_modified_type_p (tree type
, tree fn
)
6414 /* Test if T is either variable (if FN is zero) or an expression containing
6415 a variable in FN. */
6416 #define RETURN_TRUE_IF_VAR(T) \
6417 do { tree _t = (T); \
6418 if (_t && _t != error_mark_node && TREE_CODE (_t) != INTEGER_CST \
6419 && (!fn || walk_tree (&_t, find_var_from_fn, fn, NULL))) \
6420 return true; } while (0)
6422 if (type
== error_mark_node
)
6425 /* If TYPE itself has variable size, it is variably modified. */
6426 RETURN_TRUE_IF_VAR (TYPE_SIZE (type
));
6427 RETURN_TRUE_IF_VAR (TYPE_SIZE_UNIT (type
));
6429 switch (TREE_CODE (type
))
6432 case REFERENCE_TYPE
:
6434 if (variably_modified_type_p (TREE_TYPE (type
), fn
))
6440 /* If TYPE is a function type, it is variably modified if the
6441 return type is variably modified. */
6442 if (variably_modified_type_p (TREE_TYPE (type
), fn
))
6448 case FIXED_POINT_TYPE
:
6451 /* Scalar types are variably modified if their end points
6453 RETURN_TRUE_IF_VAR (TYPE_MIN_VALUE (type
));
6454 RETURN_TRUE_IF_VAR (TYPE_MAX_VALUE (type
));
6459 case QUAL_UNION_TYPE
:
6460 /* We can't see if any of the fields are variably-modified by the
6461 definition we normally use, since that would produce infinite
6462 recursion via pointers. */
6463 /* This is variably modified if some field's type is. */
6464 for (t
= TYPE_FIELDS (type
); t
; t
= TREE_CHAIN (t
))
6465 if (TREE_CODE (t
) == FIELD_DECL
)
6467 RETURN_TRUE_IF_VAR (DECL_FIELD_OFFSET (t
));
6468 RETURN_TRUE_IF_VAR (DECL_SIZE (t
));
6469 RETURN_TRUE_IF_VAR (DECL_SIZE_UNIT (t
));
6471 if (TREE_CODE (type
) == QUAL_UNION_TYPE
)
6472 RETURN_TRUE_IF_VAR (DECL_QUALIFIER (t
));
6477 /* Do not call ourselves to avoid infinite recursion. This is
6478 variably modified if the element type is. */
6479 RETURN_TRUE_IF_VAR (TYPE_SIZE (TREE_TYPE (type
)));
6480 RETURN_TRUE_IF_VAR (TYPE_SIZE_UNIT (TREE_TYPE (type
)));
6487 /* The current language may have other cases to check, but in general,
6488 all other types are not variably modified. */
6489 return lang_hooks
.tree_inlining
.var_mod_type_p (type
, fn
);
6491 #undef RETURN_TRUE_IF_VAR
6494 /* Given a DECL or TYPE, return the scope in which it was declared, or
6495 NULL_TREE if there is no containing scope. */
6498 get_containing_scope (const_tree t
)
6500 return (TYPE_P (t
) ? TYPE_CONTEXT (t
) : DECL_CONTEXT (t
));
6503 /* Return the innermost context enclosing DECL that is
6504 a FUNCTION_DECL, or zero if none. */
6507 decl_function_context (const_tree decl
)
6511 if (TREE_CODE (decl
) == ERROR_MARK
)
6514 /* C++ virtual functions use DECL_CONTEXT for the class of the vtable
6515 where we look up the function at runtime. Such functions always take
6516 a first argument of type 'pointer to real context'.
6518 C++ should really be fixed to use DECL_CONTEXT for the real context,
6519 and use something else for the "virtual context". */
6520 else if (TREE_CODE (decl
) == FUNCTION_DECL
&& DECL_VINDEX (decl
))
6523 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl
)))));
6525 context
= DECL_CONTEXT (decl
);
6527 while (context
&& TREE_CODE (context
) != FUNCTION_DECL
)
6529 if (TREE_CODE (context
) == BLOCK
)
6530 context
= BLOCK_SUPERCONTEXT (context
);
6532 context
= get_containing_scope (context
);
6538 /* Return the innermost context enclosing DECL that is
6539 a RECORD_TYPE, UNION_TYPE or QUAL_UNION_TYPE, or zero if none.
6540 TYPE_DECLs and FUNCTION_DECLs are transparent to this function. */
6543 decl_type_context (const_tree decl
)
6545 tree context
= DECL_CONTEXT (decl
);
6548 switch (TREE_CODE (context
))
6550 case NAMESPACE_DECL
:
6551 case TRANSLATION_UNIT_DECL
:
6556 case QUAL_UNION_TYPE
:
6561 context
= DECL_CONTEXT (context
);
6565 context
= BLOCK_SUPERCONTEXT (context
);
6575 /* CALL is a CALL_EXPR. Return the declaration for the function
6576 called, or NULL_TREE if the called function cannot be
6580 get_callee_fndecl (const_tree call
)
6584 if (call
== error_mark_node
)
6585 return error_mark_node
;
6587 /* It's invalid to call this function with anything but a
6589 gcc_assert (TREE_CODE (call
) == CALL_EXPR
);
6591 /* The first operand to the CALL is the address of the function
6593 addr
= CALL_EXPR_FN (call
);
6597 /* If this is a readonly function pointer, extract its initial value. */
6598 if (DECL_P (addr
) && TREE_CODE (addr
) != FUNCTION_DECL
6599 && TREE_READONLY (addr
) && ! TREE_THIS_VOLATILE (addr
)
6600 && DECL_INITIAL (addr
))
6601 addr
= DECL_INITIAL (addr
);
6603 /* If the address is just `&f' for some function `f', then we know
6604 that `f' is being called. */
6605 if (TREE_CODE (addr
) == ADDR_EXPR
6606 && TREE_CODE (TREE_OPERAND (addr
, 0)) == FUNCTION_DECL
)
6607 return TREE_OPERAND (addr
, 0);
6609 /* We couldn't figure out what was being called. Maybe the front
6610 end has some idea. */
6611 return lang_hooks
.lang_get_callee_fndecl (call
);
6614 /* Print debugging information about tree nodes generated during the compile,
6615 and any language-specific information. */
6618 dump_tree_statistics (void)
6620 #ifdef GATHER_STATISTICS
6622 int total_nodes
, total_bytes
;
6625 fprintf (stderr
, "\n??? tree nodes created\n\n");
6626 #ifdef GATHER_STATISTICS
6627 fprintf (stderr
, "Kind Nodes Bytes\n");
6628 fprintf (stderr
, "---------------------------------------\n");
6629 total_nodes
= total_bytes
= 0;
6630 for (i
= 0; i
< (int) all_kinds
; i
++)
6632 fprintf (stderr
, "%-20s %7d %10d\n", tree_node_kind_names
[i
],
6633 tree_node_counts
[i
], tree_node_sizes
[i
]);
6634 total_nodes
+= tree_node_counts
[i
];
6635 total_bytes
+= tree_node_sizes
[i
];
6637 fprintf (stderr
, "---------------------------------------\n");
6638 fprintf (stderr
, "%-20s %7d %10d\n", "Total", total_nodes
, total_bytes
);
6639 fprintf (stderr
, "---------------------------------------\n");
6640 ssanames_print_statistics ();
6641 phinodes_print_statistics ();
6643 fprintf (stderr
, "(No per-node statistics)\n");
6645 print_type_hash_statistics ();
6646 print_debug_expr_statistics ();
6647 print_value_expr_statistics ();
6648 print_restrict_base_statistics ();
6649 lang_hooks
.print_statistics ();
6652 #define FILE_FUNCTION_FORMAT "_GLOBAL__%s_%s"
6654 /* Generate a crc32 of a string. */
6657 crc32_string (unsigned chksum
, const char *string
)
6661 unsigned value
= *string
<< 24;
6664 for (ix
= 8; ix
--; value
<<= 1)
6668 feedback
= (value
^ chksum
) & 0x80000000 ? 0x04c11db7 : 0;
6677 /* P is a string that will be used in a symbol. Mask out any characters
6678 that are not valid in that context. */
6681 clean_symbol_name (char *p
)
6685 #ifndef NO_DOLLAR_IN_LABEL /* this for `$'; unlikely, but... -- kr */
6688 #ifndef NO_DOT_IN_LABEL /* this for `.'; unlikely, but... */
6695 /* Generate a name for a special-purpose function function.
6696 The generated name may need to be unique across the whole link.
6697 TYPE is some string to identify the purpose of this function to the
6698 linker or collect2; it must start with an uppercase letter,
6700 I - for constructors
6702 N - for C++ anonymous namespaces
6703 F - for DWARF unwind frame information. */
6706 get_file_function_name (const char *type
)
6712 /* If we already have a name we know to be unique, just use that. */
6713 if (first_global_object_name
)
6714 p
= first_global_object_name
;
6715 /* If the target is handling the constructors/destructors, they
6716 will be local to this file and the name is only necessary for
6717 debugging purposes. */
6718 else if ((type
[0] == 'I' || type
[0] == 'D') && targetm
.have_ctors_dtors
)
6720 const char *file
= main_input_filename
;
6722 file
= input_filename
;
6723 /* Just use the file's basename, because the full pathname
6724 might be quite long. */
6725 p
= strrchr (file
, '/');
6730 p
= q
= ASTRDUP (p
);
6731 clean_symbol_name (q
);
6735 /* Otherwise, the name must be unique across the entire link.
6736 We don't have anything that we know to be unique to this translation
6737 unit, so use what we do have and throw in some randomness. */
6739 const char *name
= weak_global_object_name
;
6740 const char *file
= main_input_filename
;
6745 file
= input_filename
;
6747 len
= strlen (file
);
6748 q
= alloca (9 * 2 + len
+ 1);
6749 memcpy (q
, file
, len
+ 1);
6750 clean_symbol_name (q
);
6752 sprintf (q
+ len
, "_%08X_%08X", crc32_string (0, name
),
6753 crc32_string (0, get_random_seed (false)));
6758 buf
= alloca (sizeof (FILE_FUNCTION_FORMAT
) + strlen (p
) + strlen (type
));
6760 /* Set up the name of the file-level functions we may need.
6761 Use a global object (which is already required to be unique over
6762 the program) rather than the file name (which imposes extra
6764 sprintf (buf
, FILE_FUNCTION_FORMAT
, type
, p
);
6766 return get_identifier (buf
);
6769 #if defined ENABLE_TREE_CHECKING && (GCC_VERSION >= 2007)
6771 /* Complain that the tree code of NODE does not match the expected 0
6772 terminated list of trailing codes. The trailing code list can be
6773 empty, for a more vague error message. FILE, LINE, and FUNCTION
6774 are of the caller. */
6777 tree_check_failed (const_tree node
, const char *file
,
6778 int line
, const char *function
, ...)
6782 unsigned length
= 0;
6785 va_start (args
, function
);
6786 while ((code
= va_arg (args
, int)))
6787 length
+= 4 + strlen (tree_code_name
[code
]);
6792 va_start (args
, function
);
6793 length
+= strlen ("expected ");
6794 buffer
= tmp
= alloca (length
);
6796 while ((code
= va_arg (args
, int)))
6798 const char *prefix
= length
? " or " : "expected ";
6800 strcpy (tmp
+ length
, prefix
);
6801 length
+= strlen (prefix
);
6802 strcpy (tmp
+ length
, tree_code_name
[code
]);
6803 length
+= strlen (tree_code_name
[code
]);
6808 buffer
= "unexpected node";
6810 internal_error ("tree check: %s, have %s in %s, at %s:%d",
6811 buffer
, tree_code_name
[TREE_CODE (node
)],
6812 function
, trim_filename (file
), line
);
6815 /* Complain that the tree code of NODE does match the expected 0
6816 terminated list of trailing codes. FILE, LINE, and FUNCTION are of
6820 tree_not_check_failed (const_tree node
, const char *file
,
6821 int line
, const char *function
, ...)
6825 unsigned length
= 0;
6828 va_start (args
, function
);
6829 while ((code
= va_arg (args
, int)))
6830 length
+= 4 + strlen (tree_code_name
[code
]);
6832 va_start (args
, function
);
6833 buffer
= alloca (length
);
6835 while ((code
= va_arg (args
, int)))
6839 strcpy (buffer
+ length
, " or ");
6842 strcpy (buffer
+ length
, tree_code_name
[code
]);
6843 length
+= strlen (tree_code_name
[code
]);
6847 internal_error ("tree check: expected none of %s, have %s in %s, at %s:%d",
6848 buffer
, tree_code_name
[TREE_CODE (node
)],
6849 function
, trim_filename (file
), line
);
6852 /* Similar to tree_check_failed, except that we check for a class of tree
6853 code, given in CL. */
6856 tree_class_check_failed (const_tree node
, const enum tree_code_class cl
,
6857 const char *file
, int line
, const char *function
)
6860 ("tree check: expected class %qs, have %qs (%s) in %s, at %s:%d",
6861 TREE_CODE_CLASS_STRING (cl
),
6862 TREE_CODE_CLASS_STRING (TREE_CODE_CLASS (TREE_CODE (node
))),
6863 tree_code_name
[TREE_CODE (node
)], function
, trim_filename (file
), line
);
6866 /* Similar to tree_check_failed, except that instead of specifying a
6867 dozen codes, use the knowledge that they're all sequential. */
6870 tree_range_check_failed (const_tree node
, const char *file
, int line
,
6871 const char *function
, enum tree_code c1
,
6875 unsigned length
= 0;
6878 for (c
= c1
; c
<= c2
; ++c
)
6879 length
+= 4 + strlen (tree_code_name
[c
]);
6881 length
+= strlen ("expected ");
6882 buffer
= alloca (length
);
6885 for (c
= c1
; c
<= c2
; ++c
)
6887 const char *prefix
= length
? " or " : "expected ";
6889 strcpy (buffer
+ length
, prefix
);
6890 length
+= strlen (prefix
);
6891 strcpy (buffer
+ length
, tree_code_name
[c
]);
6892 length
+= strlen (tree_code_name
[c
]);
6895 internal_error ("tree check: %s, have %s in %s, at %s:%d",
6896 buffer
, tree_code_name
[TREE_CODE (node
)],
6897 function
, trim_filename (file
), line
);
6901 /* Similar to tree_check_failed, except that we check that a tree does
6902 not have the specified code, given in CL. */
6905 tree_not_class_check_failed (const_tree node
, const enum tree_code_class cl
,
6906 const char *file
, int line
, const char *function
)
6909 ("tree check: did not expect class %qs, have %qs (%s) in %s, at %s:%d",
6910 TREE_CODE_CLASS_STRING (cl
),
6911 TREE_CODE_CLASS_STRING (TREE_CODE_CLASS (TREE_CODE (node
))),
6912 tree_code_name
[TREE_CODE (node
)], function
, trim_filename (file
), line
);
6916 /* Similar to tree_check_failed but applied to OMP_CLAUSE codes. */
6919 omp_clause_check_failed (const_tree node
, const char *file
, int line
,
6920 const char *function
, enum omp_clause_code code
)
6922 internal_error ("tree check: expected omp_clause %s, have %s in %s, at %s:%d",
6923 omp_clause_code_name
[code
], tree_code_name
[TREE_CODE (node
)],
6924 function
, trim_filename (file
), line
);
6928 /* Similar to tree_range_check_failed but applied to OMP_CLAUSE codes. */
6931 omp_clause_range_check_failed (const_tree node
, const char *file
, int line
,
6932 const char *function
, enum omp_clause_code c1
,
6933 enum omp_clause_code c2
)
6936 unsigned length
= 0;
6937 enum omp_clause_code c
;
6939 for (c
= c1
; c
<= c2
; ++c
)
6940 length
+= 4 + strlen (omp_clause_code_name
[c
]);
6942 length
+= strlen ("expected ");
6943 buffer
= alloca (length
);
6946 for (c
= c1
; c
<= c2
; ++c
)
6948 const char *prefix
= length
? " or " : "expected ";
6950 strcpy (buffer
+ length
, prefix
);
6951 length
+= strlen (prefix
);
6952 strcpy (buffer
+ length
, omp_clause_code_name
[c
]);
6953 length
+= strlen (omp_clause_code_name
[c
]);
6956 internal_error ("tree check: %s, have %s in %s, at %s:%d",
6957 buffer
, omp_clause_code_name
[TREE_CODE (node
)],
6958 function
, trim_filename (file
), line
);
6962 #undef DEFTREESTRUCT
6963 #define DEFTREESTRUCT(VAL, NAME) NAME,
6965 static const char *ts_enum_names
[] = {
6966 #include "treestruct.def"
6968 #undef DEFTREESTRUCT
6970 #define TS_ENUM_NAME(EN) (ts_enum_names[(EN)])
6972 /* Similar to tree_class_check_failed, except that we check for
6973 whether CODE contains the tree structure identified by EN. */
6976 tree_contains_struct_check_failed (const_tree node
,
6977 const enum tree_node_structure_enum en
,
6978 const char *file
, int line
,
6979 const char *function
)
6982 ("tree check: expected tree that contains %qs structure, have %qs in %s, at %s:%d",
6984 tree_code_name
[TREE_CODE (node
)], function
, trim_filename (file
), line
);
6988 /* Similar to above, except that the check is for the bounds of a TREE_VEC's
6989 (dynamically sized) vector. */
6992 tree_vec_elt_check_failed (int idx
, int len
, const char *file
, int line
,
6993 const char *function
)
6996 ("tree check: accessed elt %d of tree_vec with %d elts in %s, at %s:%d",
6997 idx
+ 1, len
, function
, trim_filename (file
), line
);
7000 /* Similar to above, except that the check is for the bounds of a PHI_NODE's
7001 (dynamically sized) vector. */
7004 phi_node_elt_check_failed (int idx
, int len
, const char *file
, int line
,
7005 const char *function
)
7008 ("tree check: accessed elt %d of phi_node with %d elts in %s, at %s:%d",
7009 idx
+ 1, len
, function
, trim_filename (file
), line
);
7012 /* Similar to above, except that the check is for the bounds of the operand
7013 vector of an expression node EXP. */
7016 tree_operand_check_failed (int idx
, const_tree exp
, const char *file
,
7017 int line
, const char *function
)
7019 int code
= TREE_CODE (exp
);
7021 ("tree check: accessed operand %d of %s with %d operands in %s, at %s:%d",
7022 idx
+ 1, tree_code_name
[code
], TREE_OPERAND_LENGTH (exp
),
7023 function
, trim_filename (file
), line
);
7026 /* Similar to above, except that the check is for the number of
7027 operands of an OMP_CLAUSE node. */
7030 omp_clause_operand_check_failed (int idx
, const_tree t
, const char *file
,
7031 int line
, const char *function
)
7034 ("tree check: accessed operand %d of omp_clause %s with %d operands "
7035 "in %s, at %s:%d", idx
+ 1, omp_clause_code_name
[OMP_CLAUSE_CODE (t
)],
7036 omp_clause_num_ops
[OMP_CLAUSE_CODE (t
)], function
,
7037 trim_filename (file
), line
);
7039 #endif /* ENABLE_TREE_CHECKING */
7041 /* Create a new vector type node holding SUBPARTS units of type INNERTYPE,
7042 and mapped to the machine mode MODE. Initialize its fields and build
7043 the information necessary for debugging output. */
7046 make_vector_type (tree innertype
, int nunits
, enum machine_mode mode
)
7049 hashval_t hashcode
= 0;
7051 /* Build a main variant, based on the main variant of the inner type, then
7052 use it to build the variant we return. */
7053 if ((TYPE_ATTRIBUTES (innertype
) || TYPE_QUALS (innertype
))
7054 && TYPE_MAIN_VARIANT (innertype
) != innertype
)
7055 return build_type_attribute_qual_variant (
7056 make_vector_type (TYPE_MAIN_VARIANT (innertype
), nunits
, mode
),
7057 TYPE_ATTRIBUTES (innertype
),
7058 TYPE_QUALS (innertype
));
7060 t
= make_node (VECTOR_TYPE
);
7061 TREE_TYPE (t
) = TYPE_MAIN_VARIANT (innertype
);
7062 SET_TYPE_VECTOR_SUBPARTS (t
, nunits
);
7063 TYPE_MODE (t
) = mode
;
7064 TYPE_READONLY (t
) = TYPE_READONLY (innertype
);
7065 TYPE_VOLATILE (t
) = TYPE_VOLATILE (innertype
);
7067 if (TYPE_STRUCTURAL_EQUALITY_P (innertype
))
7068 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7069 else if (TYPE_CANONICAL (innertype
) != innertype
7070 || mode
!= VOIDmode
)
7072 = make_vector_type (TYPE_CANONICAL (innertype
), nunits
, VOIDmode
);
7077 tree index
= build_int_cst (NULL_TREE
, nunits
- 1);
7078 tree array
= build_array_type (innertype
, build_index_type (index
));
7079 tree rt
= make_node (RECORD_TYPE
);
7081 TYPE_FIELDS (rt
) = build_decl (FIELD_DECL
, get_identifier ("f"), array
);
7082 DECL_CONTEXT (TYPE_FIELDS (rt
)) = rt
;
7084 TYPE_DEBUG_REPRESENTATION_TYPE (t
) = rt
;
7085 /* In dwarfout.c, type lookup uses TYPE_UID numbers. We want to output
7086 the representation type, and we want to find that die when looking up
7087 the vector type. This is most easily achieved by making the TYPE_UID
7089 TYPE_UID (rt
) = TYPE_UID (t
);
7092 hashcode
= iterative_hash_host_wide_int (VECTOR_TYPE
, hashcode
);
7093 hashcode
= iterative_hash_host_wide_int (mode
, hashcode
);
7094 hashcode
= iterative_hash_object (TYPE_HASH (innertype
), hashcode
);
7095 return type_hash_canon (hashcode
, t
);
7099 make_or_reuse_type (unsigned size
, int unsignedp
)
7101 if (size
== INT_TYPE_SIZE
)
7102 return unsignedp
? unsigned_type_node
: integer_type_node
;
7103 if (size
== CHAR_TYPE_SIZE
)
7104 return unsignedp
? unsigned_char_type_node
: signed_char_type_node
;
7105 if (size
== SHORT_TYPE_SIZE
)
7106 return unsignedp
? short_unsigned_type_node
: short_integer_type_node
;
7107 if (size
== LONG_TYPE_SIZE
)
7108 return unsignedp
? long_unsigned_type_node
: long_integer_type_node
;
7109 if (size
== LONG_LONG_TYPE_SIZE
)
7110 return (unsignedp
? long_long_unsigned_type_node
7111 : long_long_integer_type_node
);
7114 return make_unsigned_type (size
);
7116 return make_signed_type (size
);
7119 /* Create or reuse a fract type by SIZE, UNSIGNEDP, and SATP. */
7122 make_or_reuse_fract_type (unsigned size
, int unsignedp
, int satp
)
7126 if (size
== SHORT_FRACT_TYPE_SIZE
)
7127 return unsignedp
? sat_unsigned_short_fract_type_node
7128 : sat_short_fract_type_node
;
7129 if (size
== FRACT_TYPE_SIZE
)
7130 return unsignedp
? sat_unsigned_fract_type_node
: sat_fract_type_node
;
7131 if (size
== LONG_FRACT_TYPE_SIZE
)
7132 return unsignedp
? sat_unsigned_long_fract_type_node
7133 : sat_long_fract_type_node
;
7134 if (size
== LONG_LONG_FRACT_TYPE_SIZE
)
7135 return unsignedp
? sat_unsigned_long_long_fract_type_node
7136 : sat_long_long_fract_type_node
;
7140 if (size
== SHORT_FRACT_TYPE_SIZE
)
7141 return unsignedp
? unsigned_short_fract_type_node
7142 : short_fract_type_node
;
7143 if (size
== FRACT_TYPE_SIZE
)
7144 return unsignedp
? unsigned_fract_type_node
: fract_type_node
;
7145 if (size
== LONG_FRACT_TYPE_SIZE
)
7146 return unsignedp
? unsigned_long_fract_type_node
7147 : long_fract_type_node
;
7148 if (size
== LONG_LONG_FRACT_TYPE_SIZE
)
7149 return unsignedp
? unsigned_long_long_fract_type_node
7150 : long_long_fract_type_node
;
7153 return make_fract_type (size
, unsignedp
, satp
);
7156 /* Create or reuse an accum type by SIZE, UNSIGNEDP, and SATP. */
7159 make_or_reuse_accum_type (unsigned size
, int unsignedp
, int satp
)
7163 if (size
== SHORT_ACCUM_TYPE_SIZE
)
7164 return unsignedp
? sat_unsigned_short_accum_type_node
7165 : sat_short_accum_type_node
;
7166 if (size
== ACCUM_TYPE_SIZE
)
7167 return unsignedp
? sat_unsigned_accum_type_node
: sat_accum_type_node
;
7168 if (size
== LONG_ACCUM_TYPE_SIZE
)
7169 return unsignedp
? sat_unsigned_long_accum_type_node
7170 : sat_long_accum_type_node
;
7171 if (size
== LONG_LONG_ACCUM_TYPE_SIZE
)
7172 return unsignedp
? sat_unsigned_long_long_accum_type_node
7173 : sat_long_long_accum_type_node
;
7177 if (size
== SHORT_ACCUM_TYPE_SIZE
)
7178 return unsignedp
? unsigned_short_accum_type_node
7179 : short_accum_type_node
;
7180 if (size
== ACCUM_TYPE_SIZE
)
7181 return unsignedp
? unsigned_accum_type_node
: accum_type_node
;
7182 if (size
== LONG_ACCUM_TYPE_SIZE
)
7183 return unsignedp
? unsigned_long_accum_type_node
7184 : long_accum_type_node
;
7185 if (size
== LONG_LONG_ACCUM_TYPE_SIZE
)
7186 return unsignedp
? unsigned_long_long_accum_type_node
7187 : long_long_accum_type_node
;
7190 return make_accum_type (size
, unsignedp
, satp
);
7193 /* Create nodes for all integer types (and error_mark_node) using the sizes
7194 of C datatypes. The caller should call set_sizetype soon after calling
7195 this function to select one of the types as sizetype. */
7198 build_common_tree_nodes (bool signed_char
, bool signed_sizetype
)
7200 error_mark_node
= make_node (ERROR_MARK
);
7201 TREE_TYPE (error_mark_node
) = error_mark_node
;
7203 initialize_sizetypes (signed_sizetype
);
7205 /* Define both `signed char' and `unsigned char'. */
7206 signed_char_type_node
= make_signed_type (CHAR_TYPE_SIZE
);
7207 TYPE_STRING_FLAG (signed_char_type_node
) = 1;
7208 unsigned_char_type_node
= make_unsigned_type (CHAR_TYPE_SIZE
);
7209 TYPE_STRING_FLAG (unsigned_char_type_node
) = 1;
7211 /* Define `char', which is like either `signed char' or `unsigned char'
7212 but not the same as either. */
7215 ? make_signed_type (CHAR_TYPE_SIZE
)
7216 : make_unsigned_type (CHAR_TYPE_SIZE
));
7217 TYPE_STRING_FLAG (char_type_node
) = 1;
7219 short_integer_type_node
= make_signed_type (SHORT_TYPE_SIZE
);
7220 short_unsigned_type_node
= make_unsigned_type (SHORT_TYPE_SIZE
);
7221 integer_type_node
= make_signed_type (INT_TYPE_SIZE
);
7222 unsigned_type_node
= make_unsigned_type (INT_TYPE_SIZE
);
7223 long_integer_type_node
= make_signed_type (LONG_TYPE_SIZE
);
7224 long_unsigned_type_node
= make_unsigned_type (LONG_TYPE_SIZE
);
7225 long_long_integer_type_node
= make_signed_type (LONG_LONG_TYPE_SIZE
);
7226 long_long_unsigned_type_node
= make_unsigned_type (LONG_LONG_TYPE_SIZE
);
7228 /* Define a boolean type. This type only represents boolean values but
7229 may be larger than char depending on the value of BOOL_TYPE_SIZE.
7230 Front ends which want to override this size (i.e. Java) can redefine
7231 boolean_type_node before calling build_common_tree_nodes_2. */
7232 boolean_type_node
= make_unsigned_type (BOOL_TYPE_SIZE
);
7233 TREE_SET_CODE (boolean_type_node
, BOOLEAN_TYPE
);
7234 TYPE_MAX_VALUE (boolean_type_node
) = build_int_cst (boolean_type_node
, 1);
7235 TYPE_PRECISION (boolean_type_node
) = 1;
7237 /* Fill in the rest of the sized types. Reuse existing type nodes
7239 intQI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (QImode
), 0);
7240 intHI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (HImode
), 0);
7241 intSI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (SImode
), 0);
7242 intDI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (DImode
), 0);
7243 intTI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (TImode
), 0);
7245 unsigned_intQI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (QImode
), 1);
7246 unsigned_intHI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (HImode
), 1);
7247 unsigned_intSI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (SImode
), 1);
7248 unsigned_intDI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (DImode
), 1);
7249 unsigned_intTI_type_node
= make_or_reuse_type (GET_MODE_BITSIZE (TImode
), 1);
7251 access_public_node
= get_identifier ("public");
7252 access_protected_node
= get_identifier ("protected");
7253 access_private_node
= get_identifier ("private");
7256 /* Call this function after calling build_common_tree_nodes and set_sizetype.
7257 It will create several other common tree nodes. */
7260 build_common_tree_nodes_2 (int short_double
)
7262 /* Define these next since types below may used them. */
7263 integer_zero_node
= build_int_cst (NULL_TREE
, 0);
7264 integer_one_node
= build_int_cst (NULL_TREE
, 1);
7265 integer_minus_one_node
= build_int_cst (NULL_TREE
, -1);
7267 size_zero_node
= size_int (0);
7268 size_one_node
= size_int (1);
7269 bitsize_zero_node
= bitsize_int (0);
7270 bitsize_one_node
= bitsize_int (1);
7271 bitsize_unit_node
= bitsize_int (BITS_PER_UNIT
);
7273 boolean_false_node
= TYPE_MIN_VALUE (boolean_type_node
);
7274 boolean_true_node
= TYPE_MAX_VALUE (boolean_type_node
);
7276 void_type_node
= make_node (VOID_TYPE
);
7277 layout_type (void_type_node
);
7279 /* We are not going to have real types in C with less than byte alignment,
7280 so we might as well not have any types that claim to have it. */
7281 TYPE_ALIGN (void_type_node
) = BITS_PER_UNIT
;
7282 TYPE_USER_ALIGN (void_type_node
) = 0;
7284 null_pointer_node
= build_int_cst (build_pointer_type (void_type_node
), 0);
7285 layout_type (TREE_TYPE (null_pointer_node
));
7287 ptr_type_node
= build_pointer_type (void_type_node
);
7289 = build_pointer_type (build_type_variant (void_type_node
, 1, 0));
7290 fileptr_type_node
= ptr_type_node
;
7292 float_type_node
= make_node (REAL_TYPE
);
7293 TYPE_PRECISION (float_type_node
) = FLOAT_TYPE_SIZE
;
7294 layout_type (float_type_node
);
7296 double_type_node
= make_node (REAL_TYPE
);
7298 TYPE_PRECISION (double_type_node
) = FLOAT_TYPE_SIZE
;
7300 TYPE_PRECISION (double_type_node
) = DOUBLE_TYPE_SIZE
;
7301 layout_type (double_type_node
);
7303 long_double_type_node
= make_node (REAL_TYPE
);
7304 TYPE_PRECISION (long_double_type_node
) = LONG_DOUBLE_TYPE_SIZE
;
7305 layout_type (long_double_type_node
);
7307 float_ptr_type_node
= build_pointer_type (float_type_node
);
7308 double_ptr_type_node
= build_pointer_type (double_type_node
);
7309 long_double_ptr_type_node
= build_pointer_type (long_double_type_node
);
7310 integer_ptr_type_node
= build_pointer_type (integer_type_node
);
7312 /* Fixed size integer types. */
7313 uint32_type_node
= build_nonstandard_integer_type (32, true);
7314 uint64_type_node
= build_nonstandard_integer_type (64, true);
7316 /* Decimal float types. */
7317 dfloat32_type_node
= make_node (REAL_TYPE
);
7318 TYPE_PRECISION (dfloat32_type_node
) = DECIMAL32_TYPE_SIZE
;
7319 layout_type (dfloat32_type_node
);
7320 TYPE_MODE (dfloat32_type_node
) = SDmode
;
7321 dfloat32_ptr_type_node
= build_pointer_type (dfloat32_type_node
);
7323 dfloat64_type_node
= make_node (REAL_TYPE
);
7324 TYPE_PRECISION (dfloat64_type_node
) = DECIMAL64_TYPE_SIZE
;
7325 layout_type (dfloat64_type_node
);
7326 TYPE_MODE (dfloat64_type_node
) = DDmode
;
7327 dfloat64_ptr_type_node
= build_pointer_type (dfloat64_type_node
);
7329 dfloat128_type_node
= make_node (REAL_TYPE
);
7330 TYPE_PRECISION (dfloat128_type_node
) = DECIMAL128_TYPE_SIZE
;
7331 layout_type (dfloat128_type_node
);
7332 TYPE_MODE (dfloat128_type_node
) = TDmode
;
7333 dfloat128_ptr_type_node
= build_pointer_type (dfloat128_type_node
);
7335 complex_integer_type_node
= build_complex_type (integer_type_node
);
7336 complex_float_type_node
= build_complex_type (float_type_node
);
7337 complex_double_type_node
= build_complex_type (double_type_node
);
7338 complex_long_double_type_node
= build_complex_type (long_double_type_node
);
7340 /* Make fixed-point nodes based on sat/non-sat and signed/unsigned. */
7341 #define MAKE_FIXED_TYPE_NODE(KIND,WIDTH,SIZE) \
7342 sat_ ## WIDTH ## KIND ## _type_node = \
7343 make_sat_signed_ ## KIND ## _type (SIZE); \
7344 sat_unsigned_ ## WIDTH ## KIND ## _type_node = \
7345 make_sat_unsigned_ ## KIND ## _type (SIZE); \
7346 WIDTH ## KIND ## _type_node = make_signed_ ## KIND ## _type (SIZE); \
7347 unsigned_ ## WIDTH ## KIND ## _type_node = \
7348 make_unsigned_ ## KIND ## _type (SIZE);
7350 /* Make fixed-point type nodes based on four different widths. */
7351 #define MAKE_FIXED_TYPE_NODE_FAMILY(N1,N2) \
7352 MAKE_FIXED_TYPE_NODE (N1, short_, SHORT_ ## N2 ## _TYPE_SIZE) \
7353 MAKE_FIXED_TYPE_NODE (N1, , N2 ## _TYPE_SIZE) \
7354 MAKE_FIXED_TYPE_NODE (N1, long_, LONG_ ## N2 ## _TYPE_SIZE) \
7355 MAKE_FIXED_TYPE_NODE (N1, long_long_, LONG_LONG_ ## N2 ## _TYPE_SIZE)
7357 /* Make fixed-point mode nodes based on sat/non-sat and signed/unsigned. */
7358 #define MAKE_FIXED_MODE_NODE(KIND,NAME,MODE) \
7359 NAME ## _type_node = \
7360 make_or_reuse_signed_ ## KIND ## _type (GET_MODE_BITSIZE (MODE ## mode)); \
7361 u ## NAME ## _type_node = \
7362 make_or_reuse_unsigned_ ## KIND ## _type \
7363 (GET_MODE_BITSIZE (U ## MODE ## mode)); \
7364 sat_ ## NAME ## _type_node = \
7365 make_or_reuse_sat_signed_ ## KIND ## _type \
7366 (GET_MODE_BITSIZE (MODE ## mode)); \
7367 sat_u ## NAME ## _type_node = \
7368 make_or_reuse_sat_unsigned_ ## KIND ## _type \
7369 (GET_MODE_BITSIZE (U ## MODE ## mode));
7371 /* Fixed-point type and mode nodes. */
7372 MAKE_FIXED_TYPE_NODE_FAMILY (fract
, FRACT
)
7373 MAKE_FIXED_TYPE_NODE_FAMILY (accum
, ACCUM
)
7374 MAKE_FIXED_MODE_NODE (fract
, qq
, QQ
)
7375 MAKE_FIXED_MODE_NODE (fract
, hq
, HQ
)
7376 MAKE_FIXED_MODE_NODE (fract
, sq
, SQ
)
7377 MAKE_FIXED_MODE_NODE (fract
, dq
, DQ
)
7378 MAKE_FIXED_MODE_NODE (fract
, tq
, TQ
)
7379 MAKE_FIXED_MODE_NODE (accum
, ha
, HA
)
7380 MAKE_FIXED_MODE_NODE (accum
, sa
, SA
)
7381 MAKE_FIXED_MODE_NODE (accum
, da
, DA
)
7382 MAKE_FIXED_MODE_NODE (accum
, ta
, TA
)
7385 tree t
= targetm
.build_builtin_va_list ();
7387 /* Many back-ends define record types without setting TYPE_NAME.
7388 If we copied the record type here, we'd keep the original
7389 record type without a name. This breaks name mangling. So,
7390 don't copy record types and let c_common_nodes_and_builtins()
7391 declare the type to be __builtin_va_list. */
7392 if (TREE_CODE (t
) != RECORD_TYPE
)
7393 t
= build_variant_type_copy (t
);
7395 va_list_type_node
= t
;
7399 /* A subroutine of build_common_builtin_nodes. Define a builtin function. */
7402 local_define_builtin (const char *name
, tree type
, enum built_in_function code
,
7403 const char *library_name
, int ecf_flags
)
7407 decl
= add_builtin_function (name
, type
, code
, BUILT_IN_NORMAL
,
7408 library_name
, NULL_TREE
);
7409 if (ecf_flags
& ECF_CONST
)
7410 TREE_READONLY (decl
) = 1;
7411 if (ecf_flags
& ECF_PURE
)
7412 DECL_IS_PURE (decl
) = 1;
7413 if (ecf_flags
& ECF_NORETURN
)
7414 TREE_THIS_VOLATILE (decl
) = 1;
7415 if (ecf_flags
& ECF_NOTHROW
)
7416 TREE_NOTHROW (decl
) = 1;
7417 if (ecf_flags
& ECF_MALLOC
)
7418 DECL_IS_MALLOC (decl
) = 1;
7420 built_in_decls
[code
] = decl
;
7421 implicit_built_in_decls
[code
] = decl
;
7424 /* Call this function after instantiating all builtins that the language
7425 front end cares about. This will build the rest of the builtins that
7426 are relied upon by the tree optimizers and the middle-end. */
7429 build_common_builtin_nodes (void)
7433 if (built_in_decls
[BUILT_IN_MEMCPY
] == NULL
7434 || built_in_decls
[BUILT_IN_MEMMOVE
] == NULL
)
7436 tmp
= tree_cons (NULL_TREE
, size_type_node
, void_list_node
);
7437 tmp
= tree_cons (NULL_TREE
, const_ptr_type_node
, tmp
);
7438 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, tmp
);
7439 ftype
= build_function_type (ptr_type_node
, tmp
);
7441 if (built_in_decls
[BUILT_IN_MEMCPY
] == NULL
)
7442 local_define_builtin ("__builtin_memcpy", ftype
, BUILT_IN_MEMCPY
,
7443 "memcpy", ECF_NOTHROW
);
7444 if (built_in_decls
[BUILT_IN_MEMMOVE
] == NULL
)
7445 local_define_builtin ("__builtin_memmove", ftype
, BUILT_IN_MEMMOVE
,
7446 "memmove", ECF_NOTHROW
);
7449 if (built_in_decls
[BUILT_IN_MEMCMP
] == NULL
)
7451 tmp
= tree_cons (NULL_TREE
, size_type_node
, void_list_node
);
7452 tmp
= tree_cons (NULL_TREE
, const_ptr_type_node
, tmp
);
7453 tmp
= tree_cons (NULL_TREE
, const_ptr_type_node
, tmp
);
7454 ftype
= build_function_type (integer_type_node
, tmp
);
7455 local_define_builtin ("__builtin_memcmp", ftype
, BUILT_IN_MEMCMP
,
7456 "memcmp", ECF_PURE
| ECF_NOTHROW
);
7459 if (built_in_decls
[BUILT_IN_MEMSET
] == NULL
)
7461 tmp
= tree_cons (NULL_TREE
, size_type_node
, void_list_node
);
7462 tmp
= tree_cons (NULL_TREE
, integer_type_node
, tmp
);
7463 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, tmp
);
7464 ftype
= build_function_type (ptr_type_node
, tmp
);
7465 local_define_builtin ("__builtin_memset", ftype
, BUILT_IN_MEMSET
,
7466 "memset", ECF_NOTHROW
);
7469 if (built_in_decls
[BUILT_IN_ALLOCA
] == NULL
)
7471 tmp
= tree_cons (NULL_TREE
, size_type_node
, void_list_node
);
7472 ftype
= build_function_type (ptr_type_node
, tmp
);
7473 local_define_builtin ("__builtin_alloca", ftype
, BUILT_IN_ALLOCA
,
7474 "alloca", ECF_NOTHROW
| ECF_MALLOC
);
7477 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
7478 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, tmp
);
7479 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, tmp
);
7480 ftype
= build_function_type (void_type_node
, tmp
);
7481 local_define_builtin ("__builtin_init_trampoline", ftype
,
7482 BUILT_IN_INIT_TRAMPOLINE
,
7483 "__builtin_init_trampoline", ECF_NOTHROW
);
7485 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
7486 ftype
= build_function_type (ptr_type_node
, tmp
);
7487 local_define_builtin ("__builtin_adjust_trampoline", ftype
,
7488 BUILT_IN_ADJUST_TRAMPOLINE
,
7489 "__builtin_adjust_trampoline",
7490 ECF_CONST
| ECF_NOTHROW
);
7492 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
7493 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, tmp
);
7494 ftype
= build_function_type (void_type_node
, tmp
);
7495 local_define_builtin ("__builtin_nonlocal_goto", ftype
,
7496 BUILT_IN_NONLOCAL_GOTO
,
7497 "__builtin_nonlocal_goto",
7498 ECF_NORETURN
| ECF_NOTHROW
);
7500 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
7501 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, tmp
);
7502 ftype
= build_function_type (void_type_node
, tmp
);
7503 local_define_builtin ("__builtin_setjmp_setup", ftype
,
7504 BUILT_IN_SETJMP_SETUP
,
7505 "__builtin_setjmp_setup", ECF_NOTHROW
);
7507 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
7508 ftype
= build_function_type (ptr_type_node
, tmp
);
7509 local_define_builtin ("__builtin_setjmp_dispatcher", ftype
,
7510 BUILT_IN_SETJMP_DISPATCHER
,
7511 "__builtin_setjmp_dispatcher",
7512 ECF_PURE
| ECF_NOTHROW
);
7514 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
7515 ftype
= build_function_type (void_type_node
, tmp
);
7516 local_define_builtin ("__builtin_setjmp_receiver", ftype
,
7517 BUILT_IN_SETJMP_RECEIVER
,
7518 "__builtin_setjmp_receiver", ECF_NOTHROW
);
7520 ftype
= build_function_type (ptr_type_node
, void_list_node
);
7521 local_define_builtin ("__builtin_stack_save", ftype
, BUILT_IN_STACK_SAVE
,
7522 "__builtin_stack_save", ECF_NOTHROW
);
7524 tmp
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
7525 ftype
= build_function_type (void_type_node
, tmp
);
7526 local_define_builtin ("__builtin_stack_restore", ftype
,
7527 BUILT_IN_STACK_RESTORE
,
7528 "__builtin_stack_restore", ECF_NOTHROW
);
7530 ftype
= build_function_type (void_type_node
, void_list_node
);
7531 local_define_builtin ("__builtin_profile_func_enter", ftype
,
7532 BUILT_IN_PROFILE_FUNC_ENTER
, "profile_func_enter", 0);
7533 local_define_builtin ("__builtin_profile_func_exit", ftype
,
7534 BUILT_IN_PROFILE_FUNC_EXIT
, "profile_func_exit", 0);
7536 /* Complex multiplication and division. These are handled as builtins
7537 rather than optabs because emit_library_call_value doesn't support
7538 complex. Further, we can do slightly better with folding these
7539 beasties if the real and complex parts of the arguments are separate. */
7541 enum machine_mode mode
;
7543 for (mode
= MIN_MODE_COMPLEX_FLOAT
; mode
<= MAX_MODE_COMPLEX_FLOAT
; ++mode
)
7545 char mode_name_buf
[4], *q
;
7547 enum built_in_function mcode
, dcode
;
7548 tree type
, inner_type
;
7550 type
= lang_hooks
.types
.type_for_mode (mode
, 0);
7553 inner_type
= TREE_TYPE (type
);
7555 tmp
= tree_cons (NULL_TREE
, inner_type
, void_list_node
);
7556 tmp
= tree_cons (NULL_TREE
, inner_type
, tmp
);
7557 tmp
= tree_cons (NULL_TREE
, inner_type
, tmp
);
7558 tmp
= tree_cons (NULL_TREE
, inner_type
, tmp
);
7559 ftype
= build_function_type (type
, tmp
);
7561 mcode
= BUILT_IN_COMPLEX_MUL_MIN
+ mode
- MIN_MODE_COMPLEX_FLOAT
;
7562 dcode
= BUILT_IN_COMPLEX_DIV_MIN
+ mode
- MIN_MODE_COMPLEX_FLOAT
;
7564 for (p
= GET_MODE_NAME (mode
), q
= mode_name_buf
; *p
; p
++, q
++)
7568 built_in_names
[mcode
] = concat ("__mul", mode_name_buf
, "3", NULL
);
7569 local_define_builtin (built_in_names
[mcode
], ftype
, mcode
,
7570 built_in_names
[mcode
], ECF_CONST
| ECF_NOTHROW
);
7572 built_in_names
[dcode
] = concat ("__div", mode_name_buf
, "3", NULL
);
7573 local_define_builtin (built_in_names
[dcode
], ftype
, dcode
,
7574 built_in_names
[dcode
], ECF_CONST
| ECF_NOTHROW
);
7579 /* HACK. GROSS. This is absolutely disgusting. I wish there was a
7582 If we requested a pointer to a vector, build up the pointers that
7583 we stripped off while looking for the inner type. Similarly for
7584 return values from functions.
7586 The argument TYPE is the top of the chain, and BOTTOM is the
7587 new type which we will point to. */
7590 reconstruct_complex_type (tree type
, tree bottom
)
7594 if (TREE_CODE (type
) == POINTER_TYPE
)
7596 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
7597 outer
= build_pointer_type_for_mode (inner
, TYPE_MODE (type
),
7598 TYPE_REF_CAN_ALIAS_ALL (type
));
7600 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
7602 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
7603 outer
= build_reference_type_for_mode (inner
, TYPE_MODE (type
),
7604 TYPE_REF_CAN_ALIAS_ALL (type
));
7606 else if (TREE_CODE (type
) == ARRAY_TYPE
)
7608 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
7609 outer
= build_array_type (inner
, TYPE_DOMAIN (type
));
7611 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
7613 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
7614 outer
= build_function_type (inner
, TYPE_ARG_TYPES (type
));
7616 else if (TREE_CODE (type
) == METHOD_TYPE
)
7618 inner
= reconstruct_complex_type (TREE_TYPE (type
), bottom
);
7619 /* The build_method_type_directly() routine prepends 'this' to argument list,
7620 so we must compensate by getting rid of it. */
7622 = build_method_type_directly
7623 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (type
))),
7625 TREE_CHAIN (TYPE_ARG_TYPES (type
)));
7630 return build_qualified_type (outer
, TYPE_QUALS (type
));
7633 /* Returns a vector tree node given a mode (integer, vector, or BLKmode) and
7636 build_vector_type_for_mode (tree innertype
, enum machine_mode mode
)
7640 switch (GET_MODE_CLASS (mode
))
7642 case MODE_VECTOR_INT
:
7643 case MODE_VECTOR_FLOAT
:
7644 case MODE_VECTOR_FRACT
:
7645 case MODE_VECTOR_UFRACT
:
7646 case MODE_VECTOR_ACCUM
:
7647 case MODE_VECTOR_UACCUM
:
7648 nunits
= GET_MODE_NUNITS (mode
);
7652 /* Check that there are no leftover bits. */
7653 gcc_assert (GET_MODE_BITSIZE (mode
)
7654 % TREE_INT_CST_LOW (TYPE_SIZE (innertype
)) == 0);
7656 nunits
= GET_MODE_BITSIZE (mode
)
7657 / TREE_INT_CST_LOW (TYPE_SIZE (innertype
));
7664 return make_vector_type (innertype
, nunits
, mode
);
7667 /* Similarly, but takes the inner type and number of units, which must be
7671 build_vector_type (tree innertype
, int nunits
)
7673 return make_vector_type (innertype
, nunits
, VOIDmode
);
7677 /* Build RESX_EXPR with given REGION_NUMBER. */
7679 build_resx (int region_number
)
7682 t
= build1 (RESX_EXPR
, void_type_node
,
7683 build_int_cst (NULL_TREE
, region_number
));
7687 /* Given an initializer INIT, return TRUE if INIT is zero or some
7688 aggregate of zeros. Otherwise return FALSE. */
7690 initializer_zerop (const_tree init
)
7696 switch (TREE_CODE (init
))
7699 return integer_zerop (init
);
7702 /* ??? Note that this is not correct for C4X float formats. There,
7703 a bit pattern of all zeros is 1.0; 0.0 is encoded with the most
7704 negative exponent. */
7705 return real_zerop (init
)
7706 && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (init
));
7709 return fixed_zerop (init
);
7712 return integer_zerop (init
)
7713 || (real_zerop (init
)
7714 && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (TREE_REALPART (init
)))
7715 && ! REAL_VALUE_MINUS_ZERO (TREE_REAL_CST (TREE_IMAGPART (init
))));
7718 for (elt
= TREE_VECTOR_CST_ELTS (init
); elt
; elt
= TREE_CHAIN (elt
))
7719 if (!initializer_zerop (TREE_VALUE (elt
)))
7725 unsigned HOST_WIDE_INT idx
;
7727 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (init
), idx
, elt
)
7728 if (!initializer_zerop (elt
))
7738 /* Build an empty statement. */
7741 build_empty_stmt (void)
7743 return build1 (NOP_EXPR
, void_type_node
, size_zero_node
);
7747 /* Build an OpenMP clause with code CODE. */
7750 build_omp_clause (enum omp_clause_code code
)
7755 length
= omp_clause_num_ops
[code
];
7756 size
= (sizeof (struct tree_omp_clause
) + (length
- 1) * sizeof (tree
));
7758 t
= ggc_alloc (size
);
7759 memset (t
, 0, size
);
7760 TREE_SET_CODE (t
, OMP_CLAUSE
);
7761 OMP_CLAUSE_SET_CODE (t
, code
);
7763 #ifdef GATHER_STATISTICS
7764 tree_node_counts
[(int) omp_clause_kind
]++;
7765 tree_node_sizes
[(int) omp_clause_kind
] += size
;
7771 /* Set various status flags when building a CALL_EXPR object T. */
7774 process_call_operands (tree t
)
7778 side_effects
= TREE_SIDE_EFFECTS (t
);
7782 n
= TREE_OPERAND_LENGTH (t
);
7783 for (i
= 1; i
< n
; i
++)
7785 tree op
= TREE_OPERAND (t
, i
);
7786 if (op
&& TREE_SIDE_EFFECTS (op
))
7797 /* Calls have side-effects, except those to const or
7799 i
= call_expr_flags (t
);
7800 if (!(i
& (ECF_CONST
| ECF_PURE
)))
7803 TREE_SIDE_EFFECTS (t
) = side_effects
;
7806 /* Build a tcc_vl_exp object with code CODE and room for LEN operands. LEN
7807 includes the implicit operand count in TREE_OPERAND 0, and so must be >= 1.
7808 Except for the CODE and operand count field, other storage for the
7809 object is initialized to zeros. */
7812 build_vl_exp_stat (enum tree_code code
, int len MEM_STAT_DECL
)
7815 int length
= (len
- 1) * sizeof (tree
) + sizeof (struct tree_exp
);
7817 gcc_assert (TREE_CODE_CLASS (code
) == tcc_vl_exp
);
7818 gcc_assert (len
>= 1);
7820 #ifdef GATHER_STATISTICS
7821 tree_node_counts
[(int) e_kind
]++;
7822 tree_node_sizes
[(int) e_kind
] += length
;
7825 t
= ggc_alloc_zone_pass_stat (length
, &tree_zone
);
7827 memset (t
, 0, length
);
7829 TREE_SET_CODE (t
, code
);
7831 /* Can't use TREE_OPERAND to store the length because if checking is
7832 enabled, it will try to check the length before we store it. :-P */
7833 t
->exp
.operands
[0] = build_int_cst (sizetype
, len
);
7839 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE
7840 and FN and a null static chain slot. ARGLIST is a TREE_LIST of the
7844 build_call_list (tree return_type
, tree fn
, tree arglist
)
7849 t
= build_vl_exp (CALL_EXPR
, list_length (arglist
) + 3);
7850 TREE_TYPE (t
) = return_type
;
7851 CALL_EXPR_FN (t
) = fn
;
7852 CALL_EXPR_STATIC_CHAIN (t
) = NULL_TREE
;
7853 for (i
= 0; arglist
; arglist
= TREE_CHAIN (arglist
), i
++)
7854 CALL_EXPR_ARG (t
, i
) = TREE_VALUE (arglist
);
7855 process_call_operands (t
);
7859 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and
7860 FN and a null static chain slot. NARGS is the number of call arguments
7861 which are specified as "..." arguments. */
7864 build_call_nary (tree return_type
, tree fn
, int nargs
, ...)
7868 va_start (args
, nargs
);
7869 ret
= build_call_valist (return_type
, fn
, nargs
, args
);
7874 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and
7875 FN and a null static chain slot. NARGS is the number of call arguments
7876 which are specified as a va_list ARGS. */
7879 build_call_valist (tree return_type
, tree fn
, int nargs
, va_list args
)
7884 t
= build_vl_exp (CALL_EXPR
, nargs
+ 3);
7885 TREE_TYPE (t
) = return_type
;
7886 CALL_EXPR_FN (t
) = fn
;
7887 CALL_EXPR_STATIC_CHAIN (t
) = NULL_TREE
;
7888 for (i
= 0; i
< nargs
; i
++)
7889 CALL_EXPR_ARG (t
, i
) = va_arg (args
, tree
);
7890 process_call_operands (t
);
7894 /* Build a CALL_EXPR of class tcc_vl_exp with the indicated RETURN_TYPE and
7895 FN and a null static chain slot. NARGS is the number of call arguments
7896 which are specified as a tree array ARGS. */
7899 build_call_array (tree return_type
, tree fn
, int nargs
, tree
*args
)
7904 t
= build_vl_exp (CALL_EXPR
, nargs
+ 3);
7905 TREE_TYPE (t
) = return_type
;
7906 CALL_EXPR_FN (t
) = fn
;
7907 CALL_EXPR_STATIC_CHAIN (t
) = NULL_TREE
;
7908 for (i
= 0; i
< nargs
; i
++)
7909 CALL_EXPR_ARG (t
, i
) = args
[i
];
7910 process_call_operands (t
);
7915 /* Returns true if it is possible to prove that the index of
7916 an array access REF (an ARRAY_REF expression) falls into the
7920 in_array_bounds_p (tree ref
)
7922 tree idx
= TREE_OPERAND (ref
, 1);
7925 if (TREE_CODE (idx
) != INTEGER_CST
)
7928 min
= array_ref_low_bound (ref
);
7929 max
= array_ref_up_bound (ref
);
7932 || TREE_CODE (min
) != INTEGER_CST
7933 || TREE_CODE (max
) != INTEGER_CST
)
7936 if (tree_int_cst_lt (idx
, min
)
7937 || tree_int_cst_lt (max
, idx
))
7943 /* Returns true if it is possible to prove that the range of
7944 an array access REF (an ARRAY_RANGE_REF expression) falls
7945 into the array bounds. */
7948 range_in_array_bounds_p (tree ref
)
7950 tree domain_type
= TYPE_DOMAIN (TREE_TYPE (ref
));
7951 tree range_min
, range_max
, min
, max
;
7953 range_min
= TYPE_MIN_VALUE (domain_type
);
7954 range_max
= TYPE_MAX_VALUE (domain_type
);
7957 || TREE_CODE (range_min
) != INTEGER_CST
7958 || TREE_CODE (range_max
) != INTEGER_CST
)
7961 min
= array_ref_low_bound (ref
);
7962 max
= array_ref_up_bound (ref
);
7965 || TREE_CODE (min
) != INTEGER_CST
7966 || TREE_CODE (max
) != INTEGER_CST
)
7969 if (tree_int_cst_lt (range_min
, min
)
7970 || tree_int_cst_lt (max
, range_max
))
7976 /* Return true if T (assumed to be a DECL) must be assigned a memory
7980 needs_to_live_in_memory (const_tree t
)
7982 if (TREE_CODE (t
) == SSA_NAME
)
7983 t
= SSA_NAME_VAR (t
);
7985 return (TREE_ADDRESSABLE (t
)
7986 || is_global_var (t
)
7987 || (TREE_CODE (t
) == RESULT_DECL
7988 && aggregate_value_p (t
, current_function_decl
)));
7991 /* There are situations in which a language considers record types
7992 compatible which have different field lists. Decide if two fields
7993 are compatible. It is assumed that the parent records are compatible. */
7996 fields_compatible_p (const_tree f1
, const_tree f2
)
7998 if (!operand_equal_p (DECL_FIELD_BIT_OFFSET (f1
),
7999 DECL_FIELD_BIT_OFFSET (f2
), OEP_ONLY_CONST
))
8002 if (!operand_equal_p (DECL_FIELD_OFFSET (f1
),
8003 DECL_FIELD_OFFSET (f2
), OEP_ONLY_CONST
))
8006 if (!types_compatible_p (TREE_TYPE (f1
), TREE_TYPE (f2
)))
8012 /* Locate within RECORD a field that is compatible with ORIG_FIELD. */
8015 find_compatible_field (tree record
, tree orig_field
)
8019 for (f
= TYPE_FIELDS (record
); f
; f
= TREE_CHAIN (f
))
8020 if (TREE_CODE (f
) == FIELD_DECL
8021 && fields_compatible_p (f
, orig_field
))
8024 /* ??? Why isn't this on the main fields list? */
8025 f
= TYPE_VFIELD (record
);
8026 if (f
&& TREE_CODE (f
) == FIELD_DECL
8027 && fields_compatible_p (f
, orig_field
))
8030 /* ??? We should abort here, but Java appears to do Bad Things
8031 with inherited fields. */
8035 /* Return value of a constant X. */
8038 int_cst_value (const_tree x
)
8040 unsigned bits
= TYPE_PRECISION (TREE_TYPE (x
));
8041 unsigned HOST_WIDE_INT val
= TREE_INT_CST_LOW (x
);
8042 bool negative
= ((val
>> (bits
- 1)) & 1) != 0;
8044 gcc_assert (bits
<= HOST_BITS_PER_WIDE_INT
);
8047 val
|= (~(unsigned HOST_WIDE_INT
) 0) << (bits
- 1) << 1;
8049 val
&= ~((~(unsigned HOST_WIDE_INT
) 0) << (bits
- 1) << 1);
8054 /* If TYPE is an integral type, return an equivalent type which is
8055 unsigned iff UNSIGNEDP is true. If TYPE is not an integral type,
8056 return TYPE itself. */
8059 signed_or_unsigned_type_for (int unsignedp
, tree type
)
8062 if (POINTER_TYPE_P (type
))
8065 if (!INTEGRAL_TYPE_P (t
) || TYPE_UNSIGNED (t
) == unsignedp
)
8068 return lang_hooks
.types
.type_for_size (TYPE_PRECISION (t
), unsignedp
);
8071 /* Returns unsigned variant of TYPE. */
8074 unsigned_type_for (tree type
)
8076 return signed_or_unsigned_type_for (1, type
);
8079 /* Returns signed variant of TYPE. */
8082 signed_type_for (tree type
)
8084 return signed_or_unsigned_type_for (0, type
);
8087 /* Returns the largest value obtainable by casting something in INNER type to
8091 upper_bound_in_type (tree outer
, tree inner
)
8093 unsigned HOST_WIDE_INT lo
, hi
;
8094 unsigned int det
= 0;
8095 unsigned oprec
= TYPE_PRECISION (outer
);
8096 unsigned iprec
= TYPE_PRECISION (inner
);
8099 /* Compute a unique number for every combination. */
8100 det
|= (oprec
> iprec
) ? 4 : 0;
8101 det
|= TYPE_UNSIGNED (outer
) ? 2 : 0;
8102 det
|= TYPE_UNSIGNED (inner
) ? 1 : 0;
8104 /* Determine the exponent to use. */
8109 /* oprec <= iprec, outer: signed, inner: don't care. */
8114 /* oprec <= iprec, outer: unsigned, inner: don't care. */
8118 /* oprec > iprec, outer: signed, inner: signed. */
8122 /* oprec > iprec, outer: signed, inner: unsigned. */
8126 /* oprec > iprec, outer: unsigned, inner: signed. */
8130 /* oprec > iprec, outer: unsigned, inner: unsigned. */
8137 /* Compute 2^^prec - 1. */
8138 if (prec
<= HOST_BITS_PER_WIDE_INT
)
8141 lo
= ((~(unsigned HOST_WIDE_INT
) 0)
8142 >> (HOST_BITS_PER_WIDE_INT
- prec
));
8146 hi
= ((~(unsigned HOST_WIDE_INT
) 0)
8147 >> (2 * HOST_BITS_PER_WIDE_INT
- prec
));
8148 lo
= ~(unsigned HOST_WIDE_INT
) 0;
8151 return build_int_cst_wide (outer
, lo
, hi
);
8154 /* Returns the smallest value obtainable by casting something in INNER type to
8158 lower_bound_in_type (tree outer
, tree inner
)
8160 unsigned HOST_WIDE_INT lo
, hi
;
8161 unsigned oprec
= TYPE_PRECISION (outer
);
8162 unsigned iprec
= TYPE_PRECISION (inner
);
8164 /* If OUTER type is unsigned, we can definitely cast 0 to OUTER type
8166 if (TYPE_UNSIGNED (outer
)
8167 /* If we are widening something of an unsigned type, OUTER type
8168 contains all values of INNER type. In particular, both INNER
8169 and OUTER types have zero in common. */
8170 || (oprec
> iprec
&& TYPE_UNSIGNED (inner
)))
8174 /* If we are widening a signed type to another signed type, we
8175 want to obtain -2^^(iprec-1). If we are keeping the
8176 precision or narrowing to a signed type, we want to obtain
8178 unsigned prec
= oprec
> iprec
? iprec
: oprec
;
8180 if (prec
<= HOST_BITS_PER_WIDE_INT
)
8182 hi
= ~(unsigned HOST_WIDE_INT
) 0;
8183 lo
= (~(unsigned HOST_WIDE_INT
) 0) << (prec
- 1);
8187 hi
= ((~(unsigned HOST_WIDE_INT
) 0)
8188 << (prec
- HOST_BITS_PER_WIDE_INT
- 1));
8193 return build_int_cst_wide (outer
, lo
, hi
);
8196 /* Return nonzero if two operands that are suitable for PHI nodes are
8197 necessarily equal. Specifically, both ARG0 and ARG1 must be either
8198 SSA_NAME or invariant. Note that this is strictly an optimization.
8199 That is, callers of this function can directly call operand_equal_p
8200 and get the same result, only slower. */
8203 operand_equal_for_phi_arg_p (const_tree arg0
, const_tree arg1
)
8207 if (TREE_CODE (arg0
) == SSA_NAME
|| TREE_CODE (arg1
) == SSA_NAME
)
8209 return operand_equal_p (arg0
, arg1
, 0);
8212 /* Returns number of zeros at the end of binary representation of X.
8214 ??? Use ffs if available? */
8217 num_ending_zeros (const_tree x
)
8219 unsigned HOST_WIDE_INT fr
, nfr
;
8220 unsigned num
, abits
;
8221 tree type
= TREE_TYPE (x
);
8223 if (TREE_INT_CST_LOW (x
) == 0)
8225 num
= HOST_BITS_PER_WIDE_INT
;
8226 fr
= TREE_INT_CST_HIGH (x
);
8231 fr
= TREE_INT_CST_LOW (x
);
8234 for (abits
= HOST_BITS_PER_WIDE_INT
/ 2; abits
; abits
/= 2)
8237 if (nfr
<< abits
== fr
)
8244 if (num
> TYPE_PRECISION (type
))
8245 num
= TYPE_PRECISION (type
);
8247 return build_int_cst_type (type
, num
);
8251 #define WALK_SUBTREE(NODE) \
8254 result = walk_tree_1 (&(NODE), func, data, pset, lh); \
8260 /* This is a subroutine of walk_tree that walks field of TYPE that are to
8261 be walked whenever a type is seen in the tree. Rest of operands and return
8262 value are as for walk_tree. */
8265 walk_type_fields (tree type
, walk_tree_fn func
, void *data
,
8266 struct pointer_set_t
*pset
, walk_tree_lh lh
)
8268 tree result
= NULL_TREE
;
8270 switch (TREE_CODE (type
))
8273 case REFERENCE_TYPE
:
8274 /* We have to worry about mutually recursive pointers. These can't
8275 be written in C. They can in Ada. It's pathological, but
8276 there's an ACATS test (c38102a) that checks it. Deal with this
8277 by checking if we're pointing to another pointer, that one
8278 points to another pointer, that one does too, and we have no htab.
8279 If so, get a hash table. We check three levels deep to avoid
8280 the cost of the hash table if we don't need one. */
8281 if (POINTER_TYPE_P (TREE_TYPE (type
))
8282 && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (type
)))
8283 && POINTER_TYPE_P (TREE_TYPE (TREE_TYPE (TREE_TYPE (type
))))
8286 result
= walk_tree_without_duplicates (&TREE_TYPE (type
),
8294 /* ... fall through ... */
8297 WALK_SUBTREE (TREE_TYPE (type
));
8301 WALK_SUBTREE (TYPE_METHOD_BASETYPE (type
));
8306 WALK_SUBTREE (TREE_TYPE (type
));
8310 /* We never want to walk into default arguments. */
8311 for (arg
= TYPE_ARG_TYPES (type
); arg
; arg
= TREE_CHAIN (arg
))
8312 WALK_SUBTREE (TREE_VALUE (arg
));
8317 /* Don't follow this nodes's type if a pointer for fear that
8318 we'll have infinite recursion. If we have a PSET, then we
8321 || (!POINTER_TYPE_P (TREE_TYPE (type
))
8322 && TREE_CODE (TREE_TYPE (type
)) != OFFSET_TYPE
))
8323 WALK_SUBTREE (TREE_TYPE (type
));
8324 WALK_SUBTREE (TYPE_DOMAIN (type
));
8328 WALK_SUBTREE (TREE_TYPE (type
));
8329 WALK_SUBTREE (TYPE_OFFSET_BASETYPE (type
));
8339 /* Apply FUNC to all the sub-trees of TP in a pre-order traversal. FUNC is
8340 called with the DATA and the address of each sub-tree. If FUNC returns a
8341 non-NULL value, the traversal is stopped, and the value returned by FUNC
8342 is returned. If PSET is non-NULL it is used to record the nodes visited,
8343 and to avoid visiting a node more than once. */
8346 walk_tree_1 (tree
*tp
, walk_tree_fn func
, void *data
,
8347 struct pointer_set_t
*pset
, walk_tree_lh lh
)
8349 enum tree_code code
;
8353 #define WALK_SUBTREE_TAIL(NODE) \
8357 goto tail_recurse; \
8362 /* Skip empty subtrees. */
8366 /* Don't walk the same tree twice, if the user has requested
8367 that we avoid doing so. */
8368 if (pset
&& pointer_set_insert (pset
, *tp
))
8371 /* Call the function. */
8373 result
= (*func
) (tp
, &walk_subtrees
, data
);
8375 /* If we found something, return it. */
8379 code
= TREE_CODE (*tp
);
8381 /* Even if we didn't, FUNC may have decided that there was nothing
8382 interesting below this point in the tree. */
8385 /* But we still need to check our siblings. */
8386 if (code
== TREE_LIST
)
8387 WALK_SUBTREE_TAIL (TREE_CHAIN (*tp
));
8388 else if (code
== OMP_CLAUSE
)
8389 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
8396 result
= (*lh
) (tp
, &walk_subtrees
, func
, data
, pset
);
8397 if (result
|| !walk_subtrees
)
8404 case IDENTIFIER_NODE
:
8411 case PLACEHOLDER_EXPR
:
8415 /* None of these have subtrees other than those already walked
8420 WALK_SUBTREE (TREE_VALUE (*tp
));
8421 WALK_SUBTREE_TAIL (TREE_CHAIN (*tp
));
8426 int len
= TREE_VEC_LENGTH (*tp
);
8431 /* Walk all elements but the first. */
8433 WALK_SUBTREE (TREE_VEC_ELT (*tp
, len
));
8435 /* Now walk the first one as a tail call. */
8436 WALK_SUBTREE_TAIL (TREE_VEC_ELT (*tp
, 0));
8440 WALK_SUBTREE (TREE_REALPART (*tp
));
8441 WALK_SUBTREE_TAIL (TREE_IMAGPART (*tp
));
8445 unsigned HOST_WIDE_INT idx
;
8446 constructor_elt
*ce
;
8449 VEC_iterate(constructor_elt
, CONSTRUCTOR_ELTS (*tp
), idx
, ce
);
8451 WALK_SUBTREE (ce
->value
);
8456 WALK_SUBTREE_TAIL (TREE_OPERAND (*tp
, 0));
8461 for (decl
= BIND_EXPR_VARS (*tp
); decl
; decl
= TREE_CHAIN (decl
))
8463 /* Walk the DECL_INITIAL and DECL_SIZE. We don't want to walk
8464 into declarations that are just mentioned, rather than
8465 declared; they don't really belong to this part of the tree.
8466 And, we can see cycles: the initializer for a declaration
8467 can refer to the declaration itself. */
8468 WALK_SUBTREE (DECL_INITIAL (decl
));
8469 WALK_SUBTREE (DECL_SIZE (decl
));
8470 WALK_SUBTREE (DECL_SIZE_UNIT (decl
));
8472 WALK_SUBTREE_TAIL (BIND_EXPR_BODY (*tp
));
8475 case STATEMENT_LIST
:
8477 tree_stmt_iterator i
;
8478 for (i
= tsi_start (*tp
); !tsi_end_p (i
); tsi_next (&i
))
8479 WALK_SUBTREE (*tsi_stmt_ptr (i
));
8484 switch (OMP_CLAUSE_CODE (*tp
))
8486 case OMP_CLAUSE_PRIVATE
:
8487 case OMP_CLAUSE_SHARED
:
8488 case OMP_CLAUSE_FIRSTPRIVATE
:
8489 case OMP_CLAUSE_LASTPRIVATE
:
8490 case OMP_CLAUSE_COPYIN
:
8491 case OMP_CLAUSE_COPYPRIVATE
:
8493 case OMP_CLAUSE_NUM_THREADS
:
8494 case OMP_CLAUSE_SCHEDULE
:
8495 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, 0));
8498 case OMP_CLAUSE_NOWAIT
:
8499 case OMP_CLAUSE_ORDERED
:
8500 case OMP_CLAUSE_DEFAULT
:
8501 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
8503 case OMP_CLAUSE_REDUCTION
:
8506 for (i
= 0; i
< 4; i
++)
8507 WALK_SUBTREE (OMP_CLAUSE_OPERAND (*tp
, i
));
8508 WALK_SUBTREE_TAIL (OMP_CLAUSE_CHAIN (*tp
));
8520 /* TARGET_EXPRs are peculiar: operands 1 and 3 can be the same.
8521 But, we only want to walk once. */
8522 len
= (TREE_OPERAND (*tp
, 3) == TREE_OPERAND (*tp
, 1)) ? 2 : 3;
8523 for (i
= 0; i
< len
; ++i
)
8524 WALK_SUBTREE (TREE_OPERAND (*tp
, i
));
8525 WALK_SUBTREE_TAIL (TREE_OPERAND (*tp
, len
));
8529 /* If this is a TYPE_DECL, walk into the fields of the type that it's
8530 defining. We only want to walk into these fields of a type in this
8531 case and not in the general case of a mere reference to the type.
8533 The criterion is as follows: if the field can be an expression, it
8534 must be walked only here. This should be in keeping with the fields
8535 that are directly gimplified in gimplify_type_sizes in order for the
8536 mark/copy-if-shared/unmark machinery of the gimplifier to work with
8537 variable-sized types.
8539 Note that DECLs get walked as part of processing the BIND_EXPR. */
8540 if (TREE_CODE (DECL_EXPR_DECL (*tp
)) == TYPE_DECL
)
8542 tree
*type_p
= &TREE_TYPE (DECL_EXPR_DECL (*tp
));
8543 if (TREE_CODE (*type_p
) == ERROR_MARK
)
8546 /* Call the function for the type. See if it returns anything or
8547 doesn't want us to continue. If we are to continue, walk both
8548 the normal fields and those for the declaration case. */
8549 result
= (*func
) (type_p
, &walk_subtrees
, data
);
8550 if (result
|| !walk_subtrees
)
8553 result
= walk_type_fields (*type_p
, func
, data
, pset
, lh
);
8557 /* If this is a record type, also walk the fields. */
8558 if (TREE_CODE (*type_p
) == RECORD_TYPE
8559 || TREE_CODE (*type_p
) == UNION_TYPE
8560 || TREE_CODE (*type_p
) == QUAL_UNION_TYPE
)
8564 for (field
= TYPE_FIELDS (*type_p
); field
;
8565 field
= TREE_CHAIN (field
))
8567 /* We'd like to look at the type of the field, but we can
8568 easily get infinite recursion. So assume it's pointed
8569 to elsewhere in the tree. Also, ignore things that
8571 if (TREE_CODE (field
) != FIELD_DECL
)
8574 WALK_SUBTREE (DECL_FIELD_OFFSET (field
));
8575 WALK_SUBTREE (DECL_SIZE (field
));
8576 WALK_SUBTREE (DECL_SIZE_UNIT (field
));
8577 if (TREE_CODE (*type_p
) == QUAL_UNION_TYPE
)
8578 WALK_SUBTREE (DECL_QUALIFIER (field
));
8582 /* Same for scalar types. */
8583 else if (TREE_CODE (*type_p
) == BOOLEAN_TYPE
8584 || TREE_CODE (*type_p
) == ENUMERAL_TYPE
8585 || TREE_CODE (*type_p
) == INTEGER_TYPE
8586 || TREE_CODE (*type_p
) == FIXED_POINT_TYPE
8587 || TREE_CODE (*type_p
) == REAL_TYPE
)
8589 WALK_SUBTREE (TYPE_MIN_VALUE (*type_p
));
8590 WALK_SUBTREE (TYPE_MAX_VALUE (*type_p
));
8593 WALK_SUBTREE (TYPE_SIZE (*type_p
));
8594 WALK_SUBTREE_TAIL (TYPE_SIZE_UNIT (*type_p
));
8599 if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code
))
8600 || IS_GIMPLE_STMT_CODE_CLASS (TREE_CODE_CLASS (code
)))
8604 /* Walk over all the sub-trees of this operand. */
8605 len
= TREE_OPERAND_LENGTH (*tp
);
8607 /* Go through the subtrees. We need to do this in forward order so
8608 that the scope of a FOR_EXPR is handled properly. */
8611 for (i
= 0; i
< len
- 1; ++i
)
8612 WALK_SUBTREE (GENERIC_TREE_OPERAND (*tp
, i
));
8613 WALK_SUBTREE_TAIL (GENERIC_TREE_OPERAND (*tp
, len
- 1));
8616 /* If this is a type, walk the needed fields in the type. */
8617 else if (TYPE_P (*tp
))
8618 return walk_type_fields (*tp
, func
, data
, pset
, lh
);
8622 /* We didn't find what we were looking for. */
8625 #undef WALK_SUBTREE_TAIL
8629 /* Like walk_tree, but does not walk duplicate nodes more than once. */
8632 walk_tree_without_duplicates_1 (tree
*tp
, walk_tree_fn func
, void *data
,
8636 struct pointer_set_t
*pset
;
8638 pset
= pointer_set_create ();
8639 result
= walk_tree_1 (tp
, func
, data
, pset
, lh
);
8640 pointer_set_destroy (pset
);
8645 /* Return true if STMT is an empty statement or contains nothing but
8646 empty statements. */
8649 empty_body_p (const_tree stmt
)
8651 const_tree_stmt_iterator i
;
8654 if (IS_EMPTY_STMT (stmt
))
8656 else if (TREE_CODE (stmt
) == BIND_EXPR
)
8657 body
= BIND_EXPR_BODY (stmt
);
8658 else if (TREE_CODE (stmt
) == STATEMENT_LIST
)
8663 for (i
= ctsi_start (body
); !ctsi_end_p (i
); ctsi_next (&i
))
8664 if (!empty_body_p (ctsi_stmt (i
)))
8673 char const c
= TREE_CODE_CLASS (TREE_CODE (t
));
8675 if (IS_EXPR_CODE_CLASS (c
))
8676 return &t
->exp
.block
;
8677 else if (IS_GIMPLE_STMT_CODE_CLASS (c
))
8678 return &GIMPLE_STMT_BLOCK (t
);
8684 generic_tree_operand (tree node
, int i
)
8686 if (GIMPLE_STMT_P (node
))
8687 return &GIMPLE_STMT_OPERAND (node
, i
);
8688 return &TREE_OPERAND (node
, i
);
8692 generic_tree_type (tree node
)
8694 if (GIMPLE_STMT_P (node
))
8695 return &void_type_node
;
8696 return &TREE_TYPE (node
);
8699 /* Build and return a TREE_LIST of arguments in the CALL_EXPR exp.
8700 FIXME: don't use this function. It exists for compatibility with
8701 the old representation of CALL_EXPRs where a list was used to hold the
8702 arguments. Places that currently extract the arglist from a CALL_EXPR
8703 ought to be rewritten to use the CALL_EXPR itself. */
8705 call_expr_arglist (tree exp
)
8707 tree arglist
= NULL_TREE
;
8709 for (i
= call_expr_nargs (exp
) - 1; i
>= 0; i
--)
8710 arglist
= tree_cons (NULL_TREE
, CALL_EXPR_ARG (exp
, i
), arglist
);
8714 #include "gt-tree.h"