1 /* Definitions for C parsing and type checking.
2 Copyright (C) 1987-2015 Free Software Foundation, Inc.
4 This file is part of GCC.
6 GCC is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation; either version 3, or (at your option) any later
11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
23 #include "c-family/c-common.h"
24 #include "diagnostic.h"
26 /* struct lang_identifier is private to c-decl.c, but langhooks.c needs to
27 know how big it is. This is sanity-checked in c-decl.c. */
28 #define C_SIZEOF_STRUCT_LANG_IDENTIFIER \
29 (sizeof (struct c_common_identifier) + 3 * sizeof (void *))
31 /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only. */
32 #define C_TYPE_FIELDS_READONLY(TYPE) TREE_LANG_FLAG_1 (TYPE)
34 /* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is volatile. */
35 #define C_TYPE_FIELDS_VOLATILE(TYPE) TREE_LANG_FLAG_2 (TYPE)
37 /* In a RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE
38 nonzero if the definition of the type has already started. */
39 #define C_TYPE_BEING_DEFINED(TYPE) TYPE_LANG_FLAG_0 (TYPE)
41 /* In an incomplete RECORD_TYPE or UNION_TYPE, a list of variable
42 declarations whose type would be completed by completing that type. */
43 #define C_TYPE_INCOMPLETE_VARS(TYPE) TYPE_VFIELD (TYPE)
45 /* In an IDENTIFIER_NODE, nonzero if this identifier is actually a
46 keyword. C_RID_CODE (node) is then the RID_* value of the keyword,
47 and C_RID_YYCODE is the token number wanted by Yacc. */
48 #define C_IS_RESERVED_WORD(ID) TREE_LANG_FLAG_0 (ID)
50 /* Record whether a type or decl was written with nonconstant size.
51 Note that TYPE_SIZE may have simplified to a constant. */
52 #define C_TYPE_VARIABLE_SIZE(TYPE) TYPE_LANG_FLAG_1 (TYPE)
53 #define C_DECL_VARIABLE_SIZE(TYPE) DECL_LANG_FLAG_0 (TYPE)
55 /* Record whether a type is defined inside a struct or union type.
56 This is used for -Wc++-compat. */
57 #define C_TYPE_DEFINED_IN_STRUCT(TYPE) TYPE_LANG_FLAG_2 (TYPE)
59 /* Record whether an "incomplete type" error was given for the type. */
60 #define C_TYPE_ERROR_REPORTED(TYPE) TYPE_LANG_FLAG_3 (TYPE)
62 /* Record whether a typedef for type `int' was actually `signed int'. */
63 #define C_TYPEDEF_EXPLICITLY_SIGNED(EXP) DECL_LANG_FLAG_1 (EXP)
65 /* For a FUNCTION_DECL, nonzero if it was defined without an explicit
67 #define C_FUNCTION_IMPLICIT_INT(EXP) DECL_LANG_FLAG_1 (EXP)
69 /* For a FUNCTION_DECL, nonzero if it was an implicit declaration. */
70 #define C_DECL_IMPLICIT(EXP) DECL_LANG_FLAG_2 (EXP)
72 /* For a PARM_DECL, nonzero if it was declared as an array. */
73 #define C_ARRAY_PARAMETER(NODE) DECL_LANG_FLAG_0 (NODE)
75 /* For FUNCTION_DECLs, evaluates true if the decl is built-in but has
77 #define C_DECL_DECLARED_BUILTIN(EXP) \
78 DECL_LANG_FLAG_3 (FUNCTION_DECL_CHECK (EXP))
80 /* For FUNCTION_DECLs, evaluates true if the decl is built-in, has a
81 built-in prototype and does not have a non-built-in prototype. */
82 #define C_DECL_BUILTIN_PROTOTYPE(EXP) \
83 DECL_LANG_FLAG_6 (FUNCTION_DECL_CHECK (EXP))
85 /* Record whether a decl was declared register. This is strictly a
86 front-end flag, whereas DECL_REGISTER is used for code generation;
87 they may differ for structures with volatile fields. */
88 #define C_DECL_REGISTER(EXP) DECL_LANG_FLAG_4 (EXP)
90 /* Record whether a decl was used in an expression anywhere except an
91 unevaluated operand of sizeof / typeof / alignof. This is only
92 used for functions declared static but not defined, though outside
93 sizeof and typeof it is set for other function decls as well. */
94 #define C_DECL_USED(EXP) DECL_LANG_FLAG_5 (FUNCTION_DECL_CHECK (EXP))
96 /* Record whether a variable has been declared threadprivate by
97 #pragma omp threadprivate. */
98 #define C_DECL_THREADPRIVATE_P(DECL) DECL_LANG_FLAG_3 (VAR_DECL_CHECK (DECL))
100 /* Nonzero for a decl which either doesn't exist or isn't a prototype.
101 N.B. Could be simplified if all built-in decls had complete prototypes
102 (but this is presently difficult because some of them need FILE*). */
103 #define C_DECL_ISNT_PROTOTYPE(EXP) \
105 || (!prototype_p (TREE_TYPE (EXP)) \
106 && !DECL_BUILT_IN (EXP)))
108 /* For FUNCTION_TYPE, a hidden list of types of arguments. The same as
109 TYPE_ARG_TYPES for functions with prototypes, but created for functions
110 without prototypes. */
111 #define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_LANG_SLOT_1 (NODE)
113 /* For a CONSTRUCTOR, whether some initializer contains a
114 subexpression meaning it is not a constant expression. */
115 #define CONSTRUCTOR_NON_CONST(EXPR) TREE_LANG_FLAG_1 (CONSTRUCTOR_CHECK (EXPR))
117 /* Record parser information about an expression that is irrelevant
118 for code generation alongside a tree representing its value. */
121 /* The value of the expression. */
123 /* Record the original unary/binary operator of an expression, which may
124 have been changed by fold, STRING_CST for unparenthesized string
125 constants, C_MAYBE_CONST_EXPR for __builtin_constant_p calls
126 (even if parenthesized), for subexpressions, and for non-constant
127 initializers, or ERROR_MARK for other expressions (including
128 parenthesized expressions). */
129 enum tree_code original_code
;
130 /* If not NULL, the original type of an expression. This will
131 differ from the type of the value field for an enum constant.
132 The type of an enum constant is a plain integer type, but this
133 field will be the enum type. */
136 /* The source range of this expression. This is redundant
137 for node values that have locations, but not all node kinds
138 have locations (e.g. constants, and references to params, locals,
139 etc), so we stash a copy here. */
140 source_range src_range
;
142 /* Access to the first and last locations within the source spelling
143 of this expression. */
144 location_t
get_start () const { return src_range
.m_start
; }
145 location_t
get_finish () const { return src_range
.m_finish
; }
148 /* Type alias for struct c_expr. This allows to use the structure
149 inside the VEC types. */
150 typedef struct c_expr c_expr_t
;
152 /* A kind of type specifier. Note that this information is currently
153 only used to distinguish tag definitions, tag references and typeof
155 enum c_typespec_kind
{
156 /* No typespec. This appears only in struct c_declspec. */
158 /* A reserved keyword type specifier. */
160 /* A reference to a tag, previously declared, such as "struct foo".
161 This includes where the previous declaration was as a different
162 kind of tag, in which case this is only valid if shadowing that
163 tag in an inner scope. */
165 /* A reference to a tag, not previously declared in a visible
168 /* A definition of a tag such as "struct foo { int a; }". */
170 /* A typedef name. */
172 /* An ObjC-specific kind of type specifier. */
174 /* A typeof specifier, or _Atomic ( type-name ). */
178 /* A type specifier: this structure is created in the parser and
179 passed to declspecs_add_type only. */
181 /* What kind of type specifier this is. */
182 enum c_typespec_kind kind
;
183 /* Whether the expression has operands suitable for use in constant
185 bool expr_const_operands
;
186 /* The specifier itself. */
188 /* An expression to be evaluated before the type specifier, in the
189 case of typeof specifiers, or NULL otherwise or if no such
190 expression is required for a particular typeof specifier. In
191 particular, when typeof is applied to an expression of variably
192 modified type, that expression must be evaluated in order to
193 determine array sizes that form part of the type, but the
194 expression itself (as opposed to the array sizes) forms no part
195 of the type and so needs to be recorded separately. */
199 /* A storage class specifier. */
200 enum c_storage_class
{
209 /* A type specifier keyword "void", "_Bool", "char", "int", "float",
210 "double", "_Decimal32", "_Decimal64", "_Decimal128", "_Fract", "_Accum",
212 enum c_typespec_keyword
{
229 /* This enum lists all the possible declarator specifiers, storage
230 class or attribute that a user can write. There is at least one
231 enumerator per possible declarator specifier in the struct
234 It is used to index the array of declspec locations in struct
236 enum c_declspec_word
{
237 cdw_typespec
/* A catch-all for a typespec. */,
238 cdw_storage_class
/* A catch-all for a storage class */,
259 cdw_number_of_elements
/* This one must always be the last
263 /* A sequence of declaration specifiers in C. When a new declaration
264 specifier is added, please update the enum c_declspec_word above
267 source_location locations
[cdw_number_of_elements
];
268 /* The type specified, if a single type specifier such as a struct,
269 union or enum specifier, typedef name or typeof specifies the
270 whole type, or NULL_TREE if none or a keyword such as "void" or
271 "char" is used. Does not include qualifiers. */
273 /* Any expression to be evaluated before the type, from a typeof
276 /* The attributes from a typedef decl. */
278 /* When parsing, the attributes. Outside the parser, this will be
279 NULL; attributes (possibly from multiple lists) will be passed
282 /* The base-2 log of the greatest alignment required by an _Alignas
283 specifier, in bytes, or -1 if no such specifiers with nonzero
286 /* For the __intN declspec, this stores the index into the int_n_* arrays. */
288 /* The storage class specifier, or csc_none if none. */
289 enum c_storage_class storage_class
;
290 /* Any type specifier keyword used such as "int", not reflecting
291 modifiers such as "short", or cts_none if none. */
292 ENUM_BITFIELD (c_typespec_keyword
) typespec_word
: 8;
293 /* The kind of type specifier if one has been seen, ctsk_none
295 ENUM_BITFIELD (c_typespec_kind
) typespec_kind
: 3;
296 /* Whether any expressions in typeof specifiers may appear in
297 constant expressions. */
298 BOOL_BITFIELD expr_const_operands
: 1;
299 /* Whether any declaration specifiers have been seen at all. */
300 BOOL_BITFIELD declspecs_seen_p
: 1;
301 /* Whether something other than a storage class specifier or
302 attribute has been seen. This is used to warn for the
303 obsolescent usage of storage class specifiers other than at the
304 start of the list. (Doing this properly would require function
305 specifiers to be handled separately from storage class
307 BOOL_BITFIELD non_sc_seen_p
: 1;
308 /* Whether the type is specified by a typedef or typeof name. */
309 BOOL_BITFIELD typedef_p
: 1;
310 /* Whether the type is explicitly "signed" or specified by a typedef
311 whose type is explicitly "signed". */
312 BOOL_BITFIELD explicit_signed_p
: 1;
313 /* Whether the specifiers include a deprecated typedef. */
314 BOOL_BITFIELD deprecated_p
: 1;
315 /* Whether the type defaulted to "int" because there were no type
317 BOOL_BITFIELD default_int_p
: 1;
318 /* Whether "long" was specified. */
319 BOOL_BITFIELD long_p
: 1;
320 /* Whether "long" was specified more than once. */
321 BOOL_BITFIELD long_long_p
: 1;
322 /* Whether "short" was specified. */
323 BOOL_BITFIELD short_p
: 1;
324 /* Whether "signed" was specified. */
325 BOOL_BITFIELD signed_p
: 1;
326 /* Whether "unsigned" was specified. */
327 BOOL_BITFIELD unsigned_p
: 1;
328 /* Whether "complex" was specified. */
329 BOOL_BITFIELD complex_p
: 1;
330 /* Whether "inline" was specified. */
331 BOOL_BITFIELD inline_p
: 1;
332 /* Whether "_Noreturn" was speciied. */
333 BOOL_BITFIELD noreturn_p
: 1;
334 /* Whether "__thread" or "_Thread_local" was specified. */
335 BOOL_BITFIELD thread_p
: 1;
336 /* Whether "__thread" rather than "_Thread_local" was specified. */
337 BOOL_BITFIELD thread_gnu_p
: 1;
338 /* Whether "const" was specified. */
339 BOOL_BITFIELD const_p
: 1;
340 /* Whether "volatile" was specified. */
341 BOOL_BITFIELD volatile_p
: 1;
342 /* Whether "restrict" was specified. */
343 BOOL_BITFIELD restrict_p
: 1;
344 /* Whether "_Atomic" was specified. */
345 BOOL_BITFIELD atomic_p
: 1;
346 /* Whether "_Sat" was specified. */
347 BOOL_BITFIELD saturating_p
: 1;
348 /* Whether any alignment specifier (even with zero alignment) was
350 BOOL_BITFIELD alignas_p
: 1;
351 /* The address space that the declaration belongs to. */
352 addr_space_t address_space
;
355 /* The various kinds of declarators in C. */
356 enum c_declarator_kind
{
365 /* Parenthesized declarator with nested attributes. */
370 /* The argument name. */
372 /* The type of the argument. */
377 /* Information about the parameters in a function declarator. */
379 /* A list of parameter decls. */
381 /* A list of structure, union and enum tags defined. */
382 vec
<c_arg_tag
, va_gc
> *tags
;
383 /* A list of argument types to go in the FUNCTION_TYPE. */
385 /* A list of non-parameter decls (notably enumeration constants)
386 defined with the parameters. */
388 /* A compound expression of VLA sizes from the parameters, or NULL.
389 In a function definition, these are used to ensure that
390 side-effects in sizes of arrays converted to pointers (such as a
391 parameter int i[n++]) take place; otherwise, they are
394 /* True when these arguments had [*]. */
395 BOOL_BITFIELD had_vla_unspec
: 1;
399 struct c_declarator
{
400 /* The kind of declarator. */
401 enum c_declarator_kind kind
;
402 location_t id_loc
; /* Currently only set for cdk_id, cdk_array. */
403 /* Except for cdk_id, the contained declarator. For cdk_id, NULL. */
404 struct c_declarator
*declarator
;
406 /* For identifiers, an IDENTIFIER_NODE or NULL_TREE if an abstract
410 struct c_arg_info
*arg_info
;
413 /* The array dimension, or NULL for [] and [*]. */
415 /* The qualifiers inside []. */
417 /* The attributes (currently ignored) inside []. */
419 /* Whether [static] was used. */
420 BOOL_BITFIELD static_p
: 1;
421 /* Whether [*] was used. */
422 BOOL_BITFIELD vla_unspec_p
: 1;
424 /* For pointers, the qualifiers on the pointer type. */
426 /* For attributes. */
433 /* The declaration specifiers. */
434 struct c_declspecs
*specs
;
435 /* The declarator. */
436 struct c_declarator
*declarator
;
441 /* The declaration specifiers, minus any prefix attributes. */
442 struct c_declspecs
*specs
;
443 /* The attributes. */
445 /* The declarator. */
446 struct c_declarator
*declarator
;
449 /* Used when parsing an enum. Initialized by start_enum. */
450 struct c_enum_contents
452 /* While defining an enum type, this is 1 plus the last enumerator
454 tree enum_next_value
;
456 /* Nonzero means that there was overflow computing enum_next_value. */
460 /* A type of reference to a static identifier in an inline
462 enum c_inline_static_type
{
463 /* Identifier with internal linkage used in function that may be an
464 inline definition (i.e., file-scope static). */
466 /* Modifiable object with static storage duration defined in
467 function that may be an inline definition (i.e., local
474 extern void c_parse_init (void);
476 /* in c-aux-info.c */
477 extern void gen_aux_info_record (tree
, int, int, int);
480 struct c_spot_bindings
;
481 struct c_struct_parse_info
;
482 extern struct obstack parser_obstack
;
483 extern tree c_break_label
;
484 extern tree c_cont_label
;
486 extern bool global_bindings_p (void);
487 extern void push_scope (void);
488 extern tree
pop_scope (void);
489 extern void c_bindings_start_stmt_expr (struct c_spot_bindings
*);
490 extern void c_bindings_end_stmt_expr (struct c_spot_bindings
*);
492 extern void record_inline_static (location_t
, tree
, tree
,
493 enum c_inline_static_type
);
494 extern void c_init_decl_processing (void);
495 extern void c_print_identifier (FILE *, tree
, int);
496 extern int quals_from_declspecs (const struct c_declspecs
*);
497 extern struct c_declarator
*build_array_declarator (location_t
, tree
,
498 struct c_declspecs
*,
500 extern tree
build_enumerator (location_t
, location_t
, struct c_enum_contents
*,
502 extern tree
check_for_loop_decls (location_t
, bool);
503 extern void mark_forward_parm_decls (void);
504 extern void declare_parm_level (void);
505 extern void undeclared_variable (location_t
, tree
);
506 extern tree
lookup_label_for_goto (location_t
, tree
);
507 extern tree
declare_label (tree
);
508 extern tree
define_label (location_t
, tree
);
509 extern struct c_spot_bindings
*c_get_switch_bindings (void);
510 extern void c_release_switch_bindings (struct c_spot_bindings
*);
511 extern bool c_check_switch_jump_warnings (struct c_spot_bindings
*,
512 location_t
, location_t
);
513 extern void finish_decl (tree
, location_t
, tree
, tree
, tree
);
514 extern tree
finish_enum (tree
, tree
, tree
);
515 extern void finish_function (void);
516 extern tree
finish_struct (location_t
, tree
, tree
, tree
,
517 struct c_struct_parse_info
*);
518 extern struct c_arg_info
*build_arg_info (void);
519 extern struct c_arg_info
*get_parm_info (bool, tree
);
520 extern tree
grokfield (location_t
, struct c_declarator
*,
521 struct c_declspecs
*, tree
, tree
*);
522 extern tree
groktypename (struct c_type_name
*, tree
*, bool *);
523 extern tree
grokparm (const struct c_parm
*, tree
*);
524 extern tree
implicitly_declare (location_t
, tree
);
525 extern void keep_next_level (void);
526 extern void pending_xref_error (void);
527 extern void c_push_function_context (void);
528 extern void c_pop_function_context (void);
529 extern void push_parm_decl (const struct c_parm
*, tree
*);
530 extern struct c_declarator
*set_array_declarator_inner (struct c_declarator
*,
531 struct c_declarator
*);
532 extern tree
c_builtin_function (tree
);
533 extern tree
c_builtin_function_ext_scope (tree
);
534 extern void shadow_tag (const struct c_declspecs
*);
535 extern void shadow_tag_warned (const struct c_declspecs
*, int);
536 extern tree
start_enum (location_t
, struct c_enum_contents
*, tree
);
537 extern int start_function (struct c_declspecs
*, struct c_declarator
*, tree
);
538 extern tree
start_decl (struct c_declarator
*, struct c_declspecs
*, bool,
540 extern tree
start_struct (location_t
, enum tree_code
, tree
,
541 struct c_struct_parse_info
**);
542 extern void store_parm_decls (void);
543 extern void store_parm_decls_from (struct c_arg_info
*);
544 extern void temp_store_parm_decls (tree
, tree
);
545 extern void temp_pop_parm_decls (void);
546 extern tree
xref_tag (enum tree_code
, tree
);
547 extern struct c_typespec
parser_xref_tag (location_t
, enum tree_code
, tree
);
548 extern struct c_parm
*build_c_parm (struct c_declspecs
*, tree
,
549 struct c_declarator
*);
550 extern struct c_declarator
*build_attrs_declarator (tree
,
551 struct c_declarator
*);
552 extern struct c_declarator
*build_function_declarator (struct c_arg_info
*,
553 struct c_declarator
*);
554 extern struct c_declarator
*build_id_declarator (tree
);
555 extern struct c_declarator
*make_pointer_declarator (struct c_declspecs
*,
556 struct c_declarator
*);
557 extern struct c_declspecs
*build_null_declspecs (void);
558 extern struct c_declspecs
*declspecs_add_qual (source_location
,
559 struct c_declspecs
*, tree
);
560 extern struct c_declspecs
*declspecs_add_type (location_t
,
561 struct c_declspecs
*,
563 extern struct c_declspecs
*declspecs_add_scspec (source_location
,
564 struct c_declspecs
*, tree
);
565 extern struct c_declspecs
*declspecs_add_attrs (source_location
,
566 struct c_declspecs
*, tree
);
567 extern struct c_declspecs
*declspecs_add_addrspace (source_location
,
568 struct c_declspecs
*,
570 extern struct c_declspecs
*declspecs_add_alignas (source_location
,
571 struct c_declspecs
*, tree
);
572 extern struct c_declspecs
*finish_declspecs (struct c_declspecs
*);
574 /* in c-objc-common.c */
575 extern bool c_objc_common_init (void);
576 extern bool c_missing_noreturn_ok_p (tree
);
577 extern bool c_warn_unused_global_decl (const_tree
);
578 extern void c_initialize_diagnostics (diagnostic_context
*);
579 extern bool c_vla_unspec_p (tree x
, tree fn
);
582 extern int in_alignof
;
583 extern int in_sizeof
;
584 extern int in_typeof
;
586 extern tree c_last_sizeof_arg
;
588 extern struct c_switch
*c_switch_stack
;
590 extern tree
c_objc_common_truthvalue_conversion (location_t
, tree
);
591 extern tree
require_complete_type (tree
);
592 extern int same_translation_unit_p (const_tree
, const_tree
);
593 extern int comptypes (tree
, tree
);
594 extern int comptypes_check_different_types (tree
, tree
, bool *);
595 extern bool c_vla_type_p (const_tree
);
596 extern bool c_mark_addressable (tree
);
597 extern void c_incomplete_type_error (const_tree
, const_tree
);
598 extern tree
c_type_promotes_to (tree
);
599 extern struct c_expr
default_function_array_conversion (location_t
,
601 extern struct c_expr
default_function_array_read_conversion (location_t
,
603 extern struct c_expr
convert_lvalue_to_rvalue (location_t
, struct c_expr
,
605 extern void mark_exp_read (tree
);
606 extern tree
composite_type (tree
, tree
);
607 extern tree
build_component_ref (location_t
, tree
, tree
);
608 extern tree
build_array_ref (location_t
, tree
, tree
);
609 extern tree
build_external_ref (location_t
, tree
, int, tree
*);
610 extern void pop_maybe_used (bool);
611 extern struct c_expr
c_expr_sizeof_expr (location_t
, struct c_expr
);
612 extern struct c_expr
c_expr_sizeof_type (location_t
, struct c_type_name
*);
613 extern struct c_expr
parser_build_unary_op (location_t
, enum tree_code
,
615 extern struct c_expr
parser_build_binary_op (location_t
,
616 enum tree_code
, struct c_expr
,
618 extern tree
build_conditional_expr (location_t
, tree
, bool, tree
, tree
,
620 extern tree
build_compound_expr (location_t
, tree
, tree
);
621 extern tree
c_cast_expr (location_t
, struct c_type_name
*, tree
);
622 extern tree
build_c_cast (location_t
, tree
, tree
);
623 extern void store_init_value (location_t
, tree
, tree
, tree
);
624 extern void maybe_warn_string_init (location_t
, tree
, struct c_expr
);
625 extern void start_init (tree
, tree
, int);
626 extern void finish_init (void);
627 extern void really_start_incremental_init (tree
);
628 extern void push_init_level (location_t
, int, struct obstack
*);
629 extern struct c_expr
pop_init_level (location_t
, int, struct obstack
*);
630 extern void set_init_index (location_t
, tree
, tree
, struct obstack
*);
631 extern void set_init_label (location_t
, tree
, struct obstack
*);
632 extern void process_init_element (location_t
, struct c_expr
, bool,
634 extern tree
build_compound_literal (location_t
, tree
, tree
, bool);
635 extern void check_compound_literal_type (location_t
, struct c_type_name
*);
636 extern tree
c_start_case (location_t
, location_t
, tree
, bool);
637 extern void c_finish_case (tree
, tree
);
638 extern tree
build_asm_expr (location_t
, tree
, tree
, tree
, tree
, tree
, bool);
639 extern tree
build_asm_stmt (tree
, tree
);
640 extern int c_types_compatible_p (tree
, tree
);
641 extern tree
c_begin_compound_stmt (bool);
642 extern tree
c_end_compound_stmt (location_t
, tree
, bool);
643 extern void c_finish_if_stmt (location_t
, tree
, tree
, tree
, bool);
644 extern void c_finish_loop (location_t
, tree
, tree
, tree
, tree
, tree
, bool);
645 extern tree
c_begin_stmt_expr (void);
646 extern tree
c_finish_stmt_expr (location_t
, tree
);
647 extern tree
c_process_expr_stmt (location_t
, tree
);
648 extern tree
c_finish_expr_stmt (location_t
, tree
);
649 extern tree
c_finish_return (location_t
, tree
, tree
);
650 extern tree
c_finish_bc_stmt (location_t
, tree
*, bool);
651 extern tree
c_finish_goto_label (location_t
, tree
);
652 extern tree
c_finish_goto_ptr (location_t
, tree
);
653 extern tree
c_expr_to_decl (tree
, bool *, bool *);
654 extern tree
c_finish_omp_construct (location_t
, enum tree_code
, tree
, tree
);
655 extern tree
c_finish_oacc_data (location_t
, tree
, tree
);
656 extern tree
c_begin_omp_parallel (void);
657 extern tree
c_finish_omp_parallel (location_t
, tree
, tree
);
658 extern tree
c_begin_omp_task (void);
659 extern tree
c_finish_omp_task (location_t
, tree
, tree
);
660 extern void c_finish_omp_cancel (location_t
, tree
);
661 extern void c_finish_omp_cancellation_point (location_t
, tree
);
662 extern tree
c_finish_omp_clauses (tree
, bool, bool = false);
663 extern tree
c_build_va_arg (location_t
, tree
, tree
);
664 extern tree
c_finish_transaction (location_t
, tree
, int);
665 extern bool c_tree_equal (tree
, tree
);
666 extern tree
c_build_function_call_vec (location_t
, vec
<location_t
>, tree
,
667 vec
<tree
, va_gc
> *, vec
<tree
, va_gc
> *);
669 /* Set to 0 at beginning of a function definition, set to 1 if
670 a return statement that specifies a return value is seen. */
672 extern int current_function_returns_value
;
674 /* Set to 0 at beginning of a function definition, set to 1 if
675 a return statement with no argument is seen. */
677 extern int current_function_returns_null
;
679 /* Set to 0 at beginning of a function definition, set to 1 if
680 a call to a noreturn function is seen. */
682 extern int current_function_returns_abnormally
;
686 /* Tell the binding oracle what kind of binding we are looking for. */
688 enum c_oracle_request
695 /* If this is non-NULL, then it is a "binding oracle" which can lazily
696 create bindings when needed by the C compiler. The oracle is told
697 the name and type of the binding to create. It can call pushdecl
698 or the like to ensure the binding is visible; or do nothing,
699 leaving the binding untouched. c-decl.c takes note of when the
700 oracle has been called and will not call it again if it fails to
701 create a given binding. */
703 typedef void c_binding_oracle_function (enum c_oracle_request
, tree identifier
);
705 extern c_binding_oracle_function
*c_binding_oracle
;
707 extern void c_finish_incomplete_decl (tree
);
708 extern tree
c_omp_reduction_id (enum tree_code
, tree
);
709 extern tree
c_omp_reduction_decl (tree
);
710 extern tree
c_omp_reduction_lookup (tree
, tree
);
711 extern tree
c_check_omp_declare_reduction_r (tree
*, int *, void *);
712 extern void c_pushtag (location_t
, tree
, tree
);
713 extern void c_bind (location_t
, tree
, bool);
714 extern bool tag_exists_p (enum tree_code
, tree
);
717 extern void pedwarn_c90 (location_t
, int opt
, const char *, ...)
718 ATTRIBUTE_GCC_DIAG(3,4);
719 extern bool pedwarn_c99 (location_t
, int opt
, const char *, ...)
720 ATTRIBUTE_GCC_DIAG(3,4);
723 set_c_expr_source_range (c_expr
*expr
,
724 location_t start
, location_t finish
);
727 set_c_expr_source_range (c_expr
*expr
,
728 source_range src_range
);
730 #endif /* ! GCC_C_TREE_H */