1 /* Definitions for C parsing and type checking.
2 Copyright (C) 1987-2014 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 a typedef for type `int' was actually `signed int'. */
60 #define C_TYPEDEF_EXPLICITLY_SIGNED(EXP) DECL_LANG_FLAG_1 (EXP)
62 /* For a FUNCTION_DECL, nonzero if it was defined without an explicit
64 #define C_FUNCTION_IMPLICIT_INT(EXP) DECL_LANG_FLAG_1 (EXP)
66 /* For a FUNCTION_DECL, nonzero if it was an implicit declaration. */
67 #define C_DECL_IMPLICIT(EXP) DECL_LANG_FLAG_2 (EXP)
69 /* For a PARM_DECL, nonzero if it was declared as an array. */
70 #define C_ARRAY_PARAMETER(NODE) DECL_LANG_FLAG_0 (NODE)
72 /* For FUNCTION_DECLs, evaluates true if the decl is built-in but has
74 #define C_DECL_DECLARED_BUILTIN(EXP) \
75 DECL_LANG_FLAG_3 (FUNCTION_DECL_CHECK (EXP))
77 /* For FUNCTION_DECLs, evaluates true if the decl is built-in, has a
78 built-in prototype and does not have a non-built-in prototype. */
79 #define C_DECL_BUILTIN_PROTOTYPE(EXP) \
80 DECL_LANG_FLAG_6 (FUNCTION_DECL_CHECK (EXP))
82 /* Record whether a decl was declared register. This is strictly a
83 front-end flag, whereas DECL_REGISTER is used for code generation;
84 they may differ for structures with volatile fields. */
85 #define C_DECL_REGISTER(EXP) DECL_LANG_FLAG_4 (EXP)
87 /* Record whether a decl was used in an expression anywhere except an
88 unevaluated operand of sizeof / typeof / alignof. This is only
89 used for functions declared static but not defined, though outside
90 sizeof and typeof it is set for other function decls as well. */
91 #define C_DECL_USED(EXP) DECL_LANG_FLAG_5 (FUNCTION_DECL_CHECK (EXP))
93 /* Record whether a variable has been declared threadprivate by
94 #pragma omp threadprivate. */
95 #define C_DECL_THREADPRIVATE_P(DECL) DECL_LANG_FLAG_3 (VAR_DECL_CHECK (DECL))
97 /* Nonzero for a decl which either doesn't exist or isn't a prototype.
98 N.B. Could be simplified if all built-in decls had complete prototypes
99 (but this is presently difficult because some of them need FILE*). */
100 #define C_DECL_ISNT_PROTOTYPE(EXP) \
102 || (!prototype_p (TREE_TYPE (EXP)) \
103 && !DECL_BUILT_IN (EXP)))
105 /* For FUNCTION_TYPE, a hidden list of types of arguments. The same as
106 TYPE_ARG_TYPES for functions with prototypes, but created for functions
107 without prototypes. */
108 #define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_LANG_SLOT_1 (NODE)
110 /* For a CONSTRUCTOR, whether some initializer contains a
111 subexpression meaning it is not a constant expression. */
112 #define CONSTRUCTOR_NON_CONST(EXPR) TREE_LANG_FLAG_1 (CONSTRUCTOR_CHECK (EXPR))
114 /* Record parser information about an expression that is irrelevant
115 for code generation alongside a tree representing its value. */
118 /* The value of the expression. */
120 /* Record the original unary/binary operator of an expression, which may
121 have been changed by fold, STRING_CST for unparenthesized string
122 constants, C_MAYBE_CONST_EXPR for __builtin_constant_p calls
123 (even if parenthesized), for subexpressions, and for non-constant
124 initializers, or ERROR_MARK for other expressions (including
125 parenthesized expressions). */
126 enum tree_code original_code
;
127 /* If not NULL, the original type of an expression. This will
128 differ from the type of the value field for an enum constant.
129 The type of an enum constant is a plain integer type, but this
130 field will be the enum type. */
134 /* Type alias for struct c_expr. This allows to use the structure
135 inside the VEC types. */
136 typedef struct c_expr c_expr_t
;
138 /* A kind of type specifier. Note that this information is currently
139 only used to distinguish tag definitions, tag references and typeof
141 enum c_typespec_kind
{
142 /* No typespec. This appears only in struct c_declspec. */
144 /* A reserved keyword type specifier. */
146 /* A reference to a tag, previously declared, such as "struct foo".
147 This includes where the previous declaration was as a different
148 kind of tag, in which case this is only valid if shadowing that
149 tag in an inner scope. */
151 /* A reference to a tag, not previously declared in a visible
154 /* A definition of a tag such as "struct foo { int a; }". */
156 /* A typedef name. */
158 /* An ObjC-specific kind of type specifier. */
160 /* A typeof specifier, or _Atomic ( type-name ). */
164 /* A type specifier: this structure is created in the parser and
165 passed to declspecs_add_type only. */
167 /* What kind of type specifier this is. */
168 enum c_typespec_kind kind
;
169 /* Whether the expression has operands suitable for use in constant
171 bool expr_const_operands
;
172 /* The specifier itself. */
174 /* An expression to be evaluated before the type specifier, in the
175 case of typeof specifiers, or NULL otherwise or if no such
176 expression is required for a particular typeof specifier. In
177 particular, when typeof is applied to an expression of variably
178 modified type, that expression must be evaluated in order to
179 determine array sizes that form part of the type, but the
180 expression itself (as opposed to the array sizes) forms no part
181 of the type and so needs to be recorded separately. */
185 /* A storage class specifier. */
186 enum c_storage_class
{
195 /* A type specifier keyword "void", "_Bool", "char", "int", "float",
196 "double", "_Decimal32", "_Decimal64", "_Decimal128", "_Fract", "_Accum",
198 enum c_typespec_keyword
{
215 /* This enum lists all the possible declarator specifiers, storage
216 class or attribute that a user can write. There is at least one
217 enumerator per possible declarator specifier in the struct
220 It is used to index the array of declspec locations in struct
222 enum c_declspec_word
{
223 cdw_typespec
/* A catch-all for a typespec. */,
224 cdw_storage_class
/* A catch-all for a storage class */,
245 cdw_number_of_elements
/* This one must always be the last
249 /* A sequence of declaration specifiers in C. When a new declaration
250 specifier is added, please update the enum c_declspec_word above
253 source_location locations
[cdw_number_of_elements
];
254 /* The type specified, if a single type specifier such as a struct,
255 union or enum specifier, typedef name or typeof specifies the
256 whole type, or NULL_TREE if none or a keyword such as "void" or
257 "char" is used. Does not include qualifiers. */
259 /* Any expression to be evaluated before the type, from a typeof
262 /* The attributes from a typedef decl. */
264 /* When parsing, the attributes. Outside the parser, this will be
265 NULL; attributes (possibly from multiple lists) will be passed
268 /* The base-2 log of the greatest alignment required by an _Alignas
269 specifier, in bytes, or -1 if no such specifiers with nonzero
272 /* The storage class specifier, or csc_none if none. */
273 enum c_storage_class storage_class
;
274 /* Any type specifier keyword used such as "int", not reflecting
275 modifiers such as "short", or cts_none if none. */
276 ENUM_BITFIELD (c_typespec_keyword
) typespec_word
: 8;
277 /* The kind of type specifier if one has been seen, ctsk_none
279 ENUM_BITFIELD (c_typespec_kind
) typespec_kind
: 3;
280 /* Whether any expressions in typeof specifiers may appear in
281 constant expressions. */
282 BOOL_BITFIELD expr_const_operands
: 1;
283 /* Whether any declaration specifiers have been seen at all. */
284 BOOL_BITFIELD declspecs_seen_p
: 1;
285 /* Whether something other than a storage class specifier or
286 attribute has been seen. This is used to warn for the
287 obsolescent usage of storage class specifiers other than at the
288 start of the list. (Doing this properly would require function
289 specifiers to be handled separately from storage class
291 BOOL_BITFIELD non_sc_seen_p
: 1;
292 /* Whether the type is specified by a typedef or typeof name. */
293 BOOL_BITFIELD typedef_p
: 1;
294 /* Whether the type is explicitly "signed" or specified by a typedef
295 whose type is explicitly "signed". */
296 BOOL_BITFIELD explicit_signed_p
: 1;
297 /* Whether the specifiers include a deprecated typedef. */
298 BOOL_BITFIELD deprecated_p
: 1;
299 /* Whether the type defaulted to "int" because there were no type
301 BOOL_BITFIELD default_int_p
: 1;
302 /* Whether "long" was specified. */
303 BOOL_BITFIELD long_p
: 1;
304 /* Whether "long" was specified more than once. */
305 BOOL_BITFIELD long_long_p
: 1;
306 /* Whether "short" was specified. */
307 BOOL_BITFIELD short_p
: 1;
308 /* Whether "signed" was specified. */
309 BOOL_BITFIELD signed_p
: 1;
310 /* Whether "unsigned" was specified. */
311 BOOL_BITFIELD unsigned_p
: 1;
312 /* Whether "complex" was specified. */
313 BOOL_BITFIELD complex_p
: 1;
314 /* Whether "inline" was specified. */
315 BOOL_BITFIELD inline_p
: 1;
316 /* Whether "_Noreturn" was speciied. */
317 BOOL_BITFIELD noreturn_p
: 1;
318 /* Whether "__thread" or "_Thread_local" was specified. */
319 BOOL_BITFIELD thread_p
: 1;
320 /* Whether "__thread" rather than "_Thread_local" was specified. */
321 BOOL_BITFIELD thread_gnu_p
: 1;
322 /* Whether "const" was specified. */
323 BOOL_BITFIELD const_p
: 1;
324 /* Whether "volatile" was specified. */
325 BOOL_BITFIELD volatile_p
: 1;
326 /* Whether "restrict" was specified. */
327 BOOL_BITFIELD restrict_p
: 1;
328 /* Whether "_Atomic" was specified. */
329 BOOL_BITFIELD atomic_p
: 1;
330 /* Whether "_Sat" was specified. */
331 BOOL_BITFIELD saturating_p
: 1;
332 /* Whether any alignment specifier (even with zero alignment) was
334 BOOL_BITFIELD alignas_p
: 1;
335 /* The address space that the declaration belongs to. */
336 addr_space_t address_space
;
339 /* The various kinds of declarators in C. */
340 enum c_declarator_kind
{
349 /* Parenthesized declarator with nested attributes. */
353 typedef struct c_arg_tag_d
{
354 /* The argument name. */
356 /* The type of the argument. */
361 /* Information about the parameters in a function declarator. */
363 /* A list of parameter decls. */
365 /* A list of structure, union and enum tags defined. */
366 vec
<c_arg_tag
, va_gc
> *tags
;
367 /* A list of argument types to go in the FUNCTION_TYPE. */
369 /* A list of non-parameter decls (notably enumeration constants)
370 defined with the parameters. */
372 /* A compound expression of VLA sizes from the parameters, or NULL.
373 In a function definition, these are used to ensure that
374 side-effects in sizes of arrays converted to pointers (such as a
375 parameter int i[n++]) take place; otherwise, they are
378 /* True when these arguments had [*]. */
379 BOOL_BITFIELD had_vla_unspec
: 1;
383 struct c_declarator
{
384 /* The kind of declarator. */
385 enum c_declarator_kind kind
;
386 location_t id_loc
; /* Currently only set for cdk_id, cdk_array. */
387 /* Except for cdk_id, the contained declarator. For cdk_id, NULL. */
388 struct c_declarator
*declarator
;
390 /* For identifiers, an IDENTIFIER_NODE or NULL_TREE if an abstract
394 struct c_arg_info
*arg_info
;
397 /* The array dimension, or NULL for [] and [*]. */
399 /* The qualifiers inside []. */
401 /* The attributes (currently ignored) inside []. */
403 /* Whether [static] was used. */
404 BOOL_BITFIELD static_p
: 1;
405 /* Whether [*] was used. */
406 BOOL_BITFIELD vla_unspec_p
: 1;
408 /* For pointers, the qualifiers on the pointer type. */
410 /* For attributes. */
417 /* The declaration specifiers. */
418 struct c_declspecs
*specs
;
419 /* The declarator. */
420 struct c_declarator
*declarator
;
425 /* The declaration specifiers, minus any prefix attributes. */
426 struct c_declspecs
*specs
;
427 /* The attributes. */
429 /* The declarator. */
430 struct c_declarator
*declarator
;
433 /* Used when parsing an enum. Initialized by start_enum. */
434 struct c_enum_contents
436 /* While defining an enum type, this is 1 plus the last enumerator
438 tree enum_next_value
;
440 /* Nonzero means that there was overflow computing enum_next_value. */
444 /* A type of reference to a static identifier in an inline
446 enum c_inline_static_type
{
447 /* Identifier with internal linkage used in function that may be an
448 inline definition (i.e., file-scope static). */
450 /* Modifiable object with static storage duration defined in
451 function that may be an inline definition (i.e., local
458 extern void c_parse_init (void);
460 /* in c-aux-info.c */
461 extern void gen_aux_info_record (tree
, int, int, int);
464 struct c_spot_bindings
;
465 struct c_struct_parse_info
;
466 extern struct obstack parser_obstack
;
467 extern tree c_break_label
;
468 extern tree c_cont_label
;
470 extern bool global_bindings_p (void);
471 extern void push_scope (void);
472 extern tree
pop_scope (void);
473 extern void c_bindings_start_stmt_expr (struct c_spot_bindings
*);
474 extern void c_bindings_end_stmt_expr (struct c_spot_bindings
*);
476 extern void record_inline_static (location_t
, tree
, tree
,
477 enum c_inline_static_type
);
478 extern void c_init_decl_processing (void);
479 extern void c_print_identifier (FILE *, tree
, int);
480 extern int quals_from_declspecs (const struct c_declspecs
*);
481 extern struct c_declarator
*build_array_declarator (location_t
, tree
,
482 struct c_declspecs
*,
484 extern tree
build_enumerator (location_t
, location_t
, struct c_enum_contents
*,
486 extern tree
check_for_loop_decls (location_t
, bool);
487 extern void mark_forward_parm_decls (void);
488 extern void declare_parm_level (void);
489 extern void undeclared_variable (location_t
, tree
);
490 extern tree
lookup_label_for_goto (location_t
, tree
);
491 extern tree
declare_label (tree
);
492 extern tree
define_label (location_t
, tree
);
493 extern struct c_spot_bindings
*c_get_switch_bindings (void);
494 extern void c_release_switch_bindings (struct c_spot_bindings
*);
495 extern bool c_check_switch_jump_warnings (struct c_spot_bindings
*,
496 location_t
, location_t
);
497 extern void finish_decl (tree
, location_t
, tree
, tree
, tree
);
498 extern tree
finish_enum (tree
, tree
, tree
);
499 extern void finish_function (void);
500 extern tree
finish_struct (location_t
, tree
, tree
, tree
,
501 struct c_struct_parse_info
*);
502 extern struct c_arg_info
*build_arg_info (void);
503 extern struct c_arg_info
*get_parm_info (bool, tree
);
504 extern tree
grokfield (location_t
, struct c_declarator
*,
505 struct c_declspecs
*, tree
, tree
*);
506 extern tree
groktypename (struct c_type_name
*, tree
*, bool *);
507 extern tree
grokparm (const struct c_parm
*, tree
*);
508 extern tree
implicitly_declare (location_t
, tree
);
509 extern void keep_next_level (void);
510 extern void pending_xref_error (void);
511 extern void c_push_function_context (void);
512 extern void c_pop_function_context (void);
513 extern void push_parm_decl (const struct c_parm
*, tree
*);
514 extern struct c_declarator
*set_array_declarator_inner (struct c_declarator
*,
515 struct c_declarator
*);
516 extern tree
c_builtin_function (tree
);
517 extern tree
c_builtin_function_ext_scope (tree
);
518 extern void shadow_tag (const struct c_declspecs
*);
519 extern void shadow_tag_warned (const struct c_declspecs
*, int);
520 extern tree
start_enum (location_t
, struct c_enum_contents
*, tree
);
521 extern int start_function (struct c_declspecs
*, struct c_declarator
*, tree
);
522 extern tree
start_decl (struct c_declarator
*, struct c_declspecs
*, bool,
524 extern tree
start_struct (location_t
, enum tree_code
, tree
,
525 struct c_struct_parse_info
**);
526 extern void store_parm_decls (void);
527 extern void store_parm_decls_from (struct c_arg_info
*);
528 extern void temp_store_parm_decls (tree
, tree
);
529 extern void temp_pop_parm_decls (void);
530 extern tree
xref_tag (enum tree_code
, tree
);
531 extern struct c_typespec
parser_xref_tag (location_t
, enum tree_code
, tree
);
532 extern struct c_parm
*build_c_parm (struct c_declspecs
*, tree
,
533 struct c_declarator
*);
534 extern struct c_declarator
*build_attrs_declarator (tree
,
535 struct c_declarator
*);
536 extern struct c_declarator
*build_function_declarator (struct c_arg_info
*,
537 struct c_declarator
*);
538 extern struct c_declarator
*build_id_declarator (tree
);
539 extern struct c_declarator
*make_pointer_declarator (struct c_declspecs
*,
540 struct c_declarator
*);
541 extern struct c_declspecs
*build_null_declspecs (void);
542 extern struct c_declspecs
*declspecs_add_qual (source_location
,
543 struct c_declspecs
*, tree
);
544 extern struct c_declspecs
*declspecs_add_type (location_t
,
545 struct c_declspecs
*,
547 extern struct c_declspecs
*declspecs_add_scspec (source_location
,
548 struct c_declspecs
*, tree
);
549 extern struct c_declspecs
*declspecs_add_attrs (source_location
,
550 struct c_declspecs
*, tree
);
551 extern struct c_declspecs
*declspecs_add_addrspace (source_location
,
552 struct c_declspecs
*,
554 extern struct c_declspecs
*declspecs_add_alignas (source_location
,
555 struct c_declspecs
*, tree
);
556 extern struct c_declspecs
*finish_declspecs (struct c_declspecs
*);
558 /* in c-objc-common.c */
559 extern bool c_objc_common_init (void);
560 extern bool c_missing_noreturn_ok_p (tree
);
561 extern bool c_warn_unused_global_decl (const_tree
);
562 extern void c_initialize_diagnostics (diagnostic_context
*);
563 extern bool c_vla_unspec_p (tree x
, tree fn
);
566 extern int in_alignof
;
567 extern int in_sizeof
;
568 extern int in_typeof
;
570 extern tree c_last_sizeof_arg
;
572 extern struct c_switch
*c_switch_stack
;
574 extern tree
c_objc_common_truthvalue_conversion (location_t
, tree
);
575 extern tree
require_complete_type (tree
);
576 extern int same_translation_unit_p (const_tree
, const_tree
);
577 extern int comptypes (tree
, tree
);
578 extern int comptypes_check_different_types (tree
, tree
, bool *);
579 extern bool c_vla_type_p (const_tree
);
580 extern bool c_mark_addressable (tree
);
581 extern void c_incomplete_type_error (const_tree
, const_tree
);
582 extern tree
c_type_promotes_to (tree
);
583 extern struct c_expr
default_function_array_conversion (location_t
,
585 extern struct c_expr
default_function_array_read_conversion (location_t
,
587 extern struct c_expr
convert_lvalue_to_rvalue (location_t
, struct c_expr
,
589 extern void mark_exp_read (tree
);
590 extern tree
composite_type (tree
, tree
);
591 extern tree
build_component_ref (location_t
, tree
, tree
);
592 extern tree
build_array_ref (location_t
, tree
, tree
);
593 extern tree
build_external_ref (location_t
, tree
, int, tree
*);
594 extern void pop_maybe_used (bool);
595 extern struct c_expr
c_expr_sizeof_expr (location_t
, struct c_expr
);
596 extern struct c_expr
c_expr_sizeof_type (location_t
, struct c_type_name
*);
597 extern struct c_expr
parser_build_unary_op (location_t
, enum tree_code
,
599 extern struct c_expr
parser_build_binary_op (location_t
,
600 enum tree_code
, struct c_expr
,
602 extern tree
build_conditional_expr (location_t
, tree
, bool, tree
, tree
,
604 extern tree
build_compound_expr (location_t
, tree
, tree
);
605 extern tree
c_cast_expr (location_t
, struct c_type_name
*, tree
);
606 extern tree
build_c_cast (location_t
, tree
, tree
);
607 extern void store_init_value (location_t
, tree
, tree
, tree
);
608 extern void maybe_warn_string_init (location_t
, tree
, struct c_expr
);
609 extern void start_init (tree
, tree
, int);
610 extern void finish_init (void);
611 extern void really_start_incremental_init (tree
);
612 extern void push_init_level (location_t
, int, struct obstack
*);
613 extern struct c_expr
pop_init_level (location_t
, int, struct obstack
*);
614 extern void set_init_index (location_t
, tree
, tree
, struct obstack
*);
615 extern void set_init_label (location_t
, tree
, struct obstack
*);
616 extern void process_init_element (location_t
, struct c_expr
, bool,
618 extern tree
build_compound_literal (location_t
, tree
, tree
, bool);
619 extern void check_compound_literal_type (location_t
, struct c_type_name
*);
620 extern tree
c_start_case (location_t
, location_t
, tree
, bool);
621 extern void c_finish_case (tree
);
622 extern tree
build_asm_expr (location_t
, tree
, tree
, tree
, tree
, tree
, bool);
623 extern tree
build_asm_stmt (tree
, tree
);
624 extern int c_types_compatible_p (tree
, tree
);
625 extern tree
c_begin_compound_stmt (bool);
626 extern tree
c_end_compound_stmt (location_t
, tree
, bool);
627 extern void c_finish_if_stmt (location_t
, tree
, tree
, tree
, bool);
628 extern void c_finish_loop (location_t
, tree
, tree
, tree
, tree
, tree
, bool);
629 extern tree
c_begin_stmt_expr (void);
630 extern tree
c_finish_stmt_expr (location_t
, tree
);
631 extern tree
c_process_expr_stmt (location_t
, tree
);
632 extern tree
c_finish_expr_stmt (location_t
, tree
);
633 extern tree
c_finish_return (location_t
, tree
, tree
);
634 extern tree
c_finish_bc_stmt (location_t
, tree
*, bool);
635 extern tree
c_finish_goto_label (location_t
, tree
);
636 extern tree
c_finish_goto_ptr (location_t
, tree
);
637 extern tree
c_expr_to_decl (tree
, bool *, bool *);
638 extern tree
c_begin_omp_parallel (void);
639 extern tree
c_finish_omp_parallel (location_t
, tree
, tree
);
640 extern tree
c_begin_omp_task (void);
641 extern tree
c_finish_omp_task (location_t
, tree
, tree
);
642 extern void c_finish_omp_cancel (location_t
, tree
);
643 extern void c_finish_omp_cancellation_point (location_t
, tree
);
644 extern tree
c_finish_omp_clauses (tree
);
645 extern tree
c_build_va_arg (location_t
, tree
, tree
);
646 extern tree
c_finish_transaction (location_t
, tree
, int);
647 extern bool c_tree_equal (tree
, tree
);
648 extern tree
c_build_function_call_vec (location_t
, vec
<location_t
>, tree
,
649 vec
<tree
, va_gc
> *, vec
<tree
, va_gc
> *);
651 /* Set to 0 at beginning of a function definition, set to 1 if
652 a return statement that specifies a return value is seen. */
654 extern int current_function_returns_value
;
656 /* Set to 0 at beginning of a function definition, set to 1 if
657 a return statement with no argument is seen. */
659 extern int current_function_returns_null
;
661 /* Set to 0 at beginning of a function definition, set to 1 if
662 a call to a noreturn function is seen. */
664 extern int current_function_returns_abnormally
;
666 /* Mode used to build pointers (VOIDmode means ptr_mode). */
668 extern enum machine_mode c_default_pointer_mode
;
671 extern void c_finish_incomplete_decl (tree
);
672 extern void c_write_global_declarations (void);
673 extern tree
c_omp_reduction_id (enum tree_code
, tree
);
674 extern tree
c_omp_reduction_decl (tree
);
675 extern tree
c_omp_reduction_lookup (tree
, tree
);
676 extern tree
c_check_omp_declare_reduction_r (tree
*, int *, void *);
679 extern void pedwarn_c90 (location_t
, int opt
, const char *, ...)
680 ATTRIBUTE_GCC_DIAG(3,4);
681 extern bool pedwarn_c99 (location_t
, int opt
, const char *, ...)
682 ATTRIBUTE_GCC_DIAG(3,4);
684 #endif /* ! GCC_C_TREE_H */