1 /* Definitions for c-common.c.
2 Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
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 #ifndef GCC_C_COMMON_H
23 #define GCC_C_COMMON_H
25 #include "splay-tree.h"
29 /* In order for the format checking to accept the C frontend
30 diagnostic framework extensions, you must include this file before
31 diagnostic-core.h, not after. The C front end formats are a subset of those
32 for C++, so they are the appropriate set to use in common code;
33 cp-tree.h overrides this for C++. */
34 #if defined(GCC_DIAGNOSTIC_CORE_H)
36 In order for the format checking to accept the C front end diagnostic \
37 framework extensions, you must include this file before diagnostic-core.h \
40 #ifndef GCC_DIAG_STYLE
41 #define GCC_DIAG_STYLE __gcc_cdiag__
43 #include "diagnostic-core.h"
45 /* Usage of TREE_LANG_FLAG_?:
46 0: TREE_NEGATED_INT (in INTEGER_CST).
47 IDENTIFIER_MARKED (used by search routines).
48 DECL_PRETTY_FUNCTION_P (in VAR_DECL)
49 C_MAYBE_CONST_EXPR_INT_OPERANDS (in C_MAYBE_CONST_EXPR, for C)
50 1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
51 STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
52 C_MAYBE_CONST_EXPR_NON_CONST (in C_MAYBE_CONST_EXPR, for C)
54 3: STATEMENT_LIST_HAS_LABEL (in STATEMENT_LIST)
58 /* Reserved identifiers. This is the union of all the keywords for C,
59 C++, and Objective-C. All the type modifiers have to be in one
60 block at the beginning, because they are used as mask bits. There
61 are 27 type modifiers; if we add many more we will have to redesign
62 the mask mechanism. */
67 /* C, in empirical order of frequency. */
69 RID_UNSIGNED
, RID_LONG
, RID_CONST
, RID_EXTERN
,
70 RID_REGISTER
, RID_TYPEDEF
, RID_SHORT
, RID_INLINE
,
71 RID_VOLATILE
, RID_SIGNED
, RID_AUTO
, RID_RESTRICT
,
74 RID_COMPLEX
, RID_THREAD
, RID_SAT
,
77 RID_FRIEND
, RID_VIRTUAL
, RID_EXPLICIT
, RID_EXPORT
, RID_MUTABLE
,
79 /* ObjC ("PQ" reserved words - they do not appear after a '@' and
80 are keywords only in specific contexts) */
81 RID_IN
, RID_OUT
, RID_INOUT
, RID_BYCOPY
, RID_BYREF
, RID_ONEWAY
,
83 /* ObjC ("PATTR" reserved words - they do not appear after a '@'
84 and are keywords only as property attributes) */
85 RID_GETTER
, RID_SETTER
,
86 RID_READONLY
, RID_READWRITE
,
87 RID_ASSIGN
, RID_RETAIN
, RID_COPY
,
90 /* C (reserved and imaginary types not implemented, so any use is a
95 RID_INT
, RID_CHAR
, RID_FLOAT
, RID_DOUBLE
, RID_VOID
,
97 RID_ENUM
, RID_STRUCT
, RID_UNION
, RID_IF
, RID_ELSE
,
98 RID_WHILE
, RID_DO
, RID_FOR
, RID_SWITCH
, RID_CASE
,
99 RID_DEFAULT
, RID_BREAK
, RID_CONTINUE
, RID_RETURN
, RID_GOTO
,
103 RID_ASM
, RID_TYPEOF
, RID_ALIGNOF
, RID_ATTRIBUTE
, RID_VA_ARG
,
104 RID_EXTENSION
, RID_IMAGPART
, RID_REALPART
, RID_LABEL
, RID_CHOOSE_EXPR
,
105 RID_TYPES_COMPATIBLE_P
,
106 RID_DFLOAT32
, RID_DFLOAT64
, RID_DFLOAT128
,
107 RID_FRACT
, RID_ACCUM
,
109 /* This means to warn that this is a C++ keyword, and then treat it
110 as a normal identifier. */
113 /* Too many ways of getting the name of a function as a string */
114 RID_FUNCTION_NAME
, RID_PRETTY_FUNCTION_NAME
, RID_C99_FUNCTION_NAME
,
116 /* C++ (some of these are keywords in Objective-C as well, but only
117 if they appear after a '@') */
118 RID_BOOL
, RID_WCHAR
, RID_CLASS
,
119 RID_PUBLIC
, RID_PRIVATE
, RID_PROTECTED
,
120 RID_TEMPLATE
, RID_NULL
, RID_CATCH
,
121 RID_DELETE
, RID_FALSE
, RID_NAMESPACE
,
122 RID_NEW
, RID_OFFSETOF
, RID_OPERATOR
,
123 RID_THIS
, RID_THROW
, RID_TRUE
,
124 RID_TRY
, RID_TYPENAME
, RID_TYPEID
,
125 RID_USING
, RID_CHAR16
, RID_CHAR32
,
128 RID_CONSTCAST
, RID_DYNCAST
, RID_REINTCAST
, RID_STATCAST
,
131 RID_HAS_NOTHROW_ASSIGN
, RID_HAS_NOTHROW_CONSTRUCTOR
,
132 RID_HAS_NOTHROW_COPY
, RID_HAS_TRIVIAL_ASSIGN
,
133 RID_HAS_TRIVIAL_CONSTRUCTOR
, RID_HAS_TRIVIAL_COPY
,
134 RID_HAS_TRIVIAL_DESTRUCTOR
, RID_HAS_VIRTUAL_DESTRUCTOR
,
135 RID_IS_ABSTRACT
, RID_IS_BASE_OF
,
136 RID_IS_CONVERTIBLE_TO
, RID_IS_CLASS
,
137 RID_IS_EMPTY
, RID_IS_ENUM
,
138 RID_IS_POD
, RID_IS_POLYMORPHIC
,
139 RID_IS_STD_LAYOUT
, RID_IS_TRIVIAL
,
140 RID_IS_UNION
, RID_IS_LITERAL_TYPE
,
143 RID_CONSTEXPR
, RID_DECLTYPE
, RID_NOEXCEPT
, RID_NULLPTR
, RID_STATIC_ASSERT
,
145 /* Objective-C ("AT" reserved words - they are only keywords when
147 RID_AT_ENCODE
, RID_AT_END
,
148 RID_AT_CLASS
, RID_AT_ALIAS
, RID_AT_DEFS
,
149 RID_AT_PRIVATE
, RID_AT_PROTECTED
, RID_AT_PUBLIC
, RID_AT_PACKAGE
,
150 RID_AT_PROTOCOL
, RID_AT_SELECTOR
,
151 RID_AT_THROW
, RID_AT_TRY
, RID_AT_CATCH
,
152 RID_AT_FINALLY
, RID_AT_SYNCHRONIZED
,
153 RID_AT_OPTIONAL
, RID_AT_REQUIRED
, RID_AT_PROPERTY
,
154 RID_AT_SYNTHESIZE
, RID_AT_DYNAMIC
,
156 RID_AT_IMPLEMENTATION
,
158 /* Named address support, mapping the keyword to a particular named address
159 number. Named address space 0 is reserved for the generic address. If
160 there are more than 254 named addresses, the addr_space_t type will need
161 to be grown from an unsigned char to unsigned short. */
162 RID_ADDR_SPACE_0
, /* generic address */
179 RID_FIRST_ADDR_SPACE
= RID_ADDR_SPACE_0
,
180 RID_LAST_ADDR_SPACE
= RID_ADDR_SPACE_15
,
184 RID_FIRST_MODIFIER
= RID_STATIC
,
185 RID_LAST_MODIFIER
= RID_ONEWAY
,
187 RID_FIRST_CXX0X
= RID_CONSTEXPR
,
188 RID_LAST_CXX0X
= RID_STATIC_ASSERT
,
189 RID_FIRST_AT
= RID_AT_ENCODE
,
190 RID_LAST_AT
= RID_AT_IMPLEMENTATION
,
191 RID_FIRST_PQ
= RID_IN
,
192 RID_LAST_PQ
= RID_ONEWAY
,
193 RID_FIRST_PATTR
= RID_GETTER
,
194 RID_LAST_PATTR
= RID_NONATOMIC
197 #define OBJC_IS_AT_KEYWORD(rid) \
198 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
199 (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
201 #define OBJC_IS_PQ_KEYWORD(rid) \
202 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
203 (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
205 #define OBJC_IS_PATTR_KEYWORD(rid) \
206 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PATTR && \
207 (unsigned int) (rid) <= (unsigned int) RID_LAST_PATTR)
209 /* OBJC_IS_CXX_KEYWORD recognizes the 'CXX_OBJC' keywords (such as
210 'class') which are shared in a subtle way between Objective-C and
211 C++. When the lexer is lexing in Objective-C/Objective-C++, if it
212 finds '@' followed by one of these identifiers (eg, '@class'), it
213 recognizes the whole as an Objective-C keyword. If the identifier
214 is found elsewhere, it follows the rules of the C/C++ language.
216 #define OBJC_IS_CXX_KEYWORD(rid) \
218 || rid == RID_PUBLIC || rid == RID_PROTECTED || rid == RID_PRIVATE \
219 || rid == RID_TRY || rid == RID_THROW || rid == RID_CATCH)
221 /* The elements of `ridpointers' are identifier nodes for the reserved
222 type names and storage classes. It is indexed by a RID_... value. */
223 extern GTY ((length ("(int) RID_MAX"))) tree
*ridpointers
;
225 /* Standard named or nameless data types of the C compiler. */
232 CTI_UNDERLYING_WCHAR_TYPE
,
234 CTI_SIGNED_SIZE_TYPE
, /* For format checking only. */
235 CTI_UNSIGNED_PTRDIFF_TYPE
, /* For format checking only. */
238 CTI_WIDEST_INT_LIT_TYPE
,
239 CTI_WIDEST_UINT_LIT_TYPE
,
241 /* Types for <stdint.h>, that may not be defined on all
253 CTI_INT_LEAST16_TYPE
,
254 CTI_INT_LEAST32_TYPE
,
255 CTI_INT_LEAST64_TYPE
,
256 CTI_UINT_LEAST8_TYPE
,
257 CTI_UINT_LEAST16_TYPE
,
258 CTI_UINT_LEAST32_TYPE
,
259 CTI_UINT_LEAST64_TYPE
,
265 CTI_UINT_FAST16_TYPE
,
266 CTI_UINT_FAST32_TYPE
,
267 CTI_UINT_FAST64_TYPE
,
272 CTI_CHAR16_ARRAY_TYPE
,
273 CTI_CHAR32_ARRAY_TYPE
,
274 CTI_WCHAR_ARRAY_TYPE
,
277 CTI_CONST_STRING_TYPE
,
279 /* Type for boolean expressions (bool in C++, int in C). */
282 CTI_TRUTHVALUE_FALSE
,
284 CTI_DEFAULT_FUNCTION_TYPE
,
286 /* These are not types, but we have to look them up all the time. */
287 CTI_FUNCTION_NAME_DECL
,
288 CTI_PRETTY_FUNCTION_NAME_DECL
,
289 CTI_C99_FUNCTION_NAME_DECL
,
290 CTI_SAVED_FUNCTION_NAME_DECLS
,
299 #define C_CPP_HASHNODE(id) \
300 (&(((struct c_common_identifier *) (id))->node))
301 #define C_RID_CODE(id) \
302 ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
303 #define C_SET_RID_CODE(id, code) \
304 (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
306 /* Identifier part common to the C front ends. Inherits from
307 tree_identifier, despite appearances. */
308 struct GTY(()) c_common_identifier
{
309 struct tree_common common
;
310 struct cpp_hashnode node
;
313 /* An entry in the reserved keyword table. */
315 struct c_common_resword
317 const char *const word
;
318 ENUM_BITFIELD(rid
) const rid
: 16;
319 const unsigned int disable
: 16;
322 /* Disable mask. Keywords are disabled if (reswords[i].disable &
323 mask) is _true_. Thus for keywords which are present in all
324 languages the disable field is zero. */
326 #define D_CONLY 0x001 /* C only (not in C++). */
327 #define D_CXXONLY 0x002 /* C++ only (not in C). */
328 #define D_C99 0x004 /* In C, C99 only. */
329 #define D_CXX0X 0x008 /* In C++, C++0X only. */
330 #define D_EXT 0x010 /* GCC extension. */
331 #define D_EXT89 0x020 /* GCC extension incorporated in C99. */
332 #define D_ASM 0x040 /* Disabled by -fno-asm. */
333 #define D_OBJC 0x080 /* In Objective C and neither C nor C++. */
334 #define D_CXX_OBJC 0x100 /* In Objective C, and C++, but not C. */
335 #define D_CXXWARN 0x200 /* In C warn with -Wcxx-compat. */
337 /* The reserved keyword table. */
338 extern const struct c_common_resword c_common_reswords
[];
340 /* The number of items in the reserved keyword table. */
341 extern const unsigned int num_c_common_reswords
;
343 #define char16_type_node c_global_trees[CTI_CHAR16_TYPE]
344 #define char32_type_node c_global_trees[CTI_CHAR32_TYPE]
345 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
346 #define underlying_wchar_type_node c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
347 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
348 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
349 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
350 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
351 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
352 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
353 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
355 #define sig_atomic_type_node c_global_trees[CTI_SIG_ATOMIC_TYPE]
356 #define int8_type_node c_global_trees[CTI_INT8_TYPE]
357 #define int16_type_node c_global_trees[CTI_INT16_TYPE]
358 #define int32_type_node c_global_trees[CTI_INT32_TYPE]
359 #define int64_type_node c_global_trees[CTI_INT64_TYPE]
360 #define uint8_type_node c_global_trees[CTI_UINT8_TYPE]
361 #define uint16_type_node c_global_trees[CTI_UINT16_TYPE]
362 #define c_uint32_type_node c_global_trees[CTI_UINT32_TYPE]
363 #define c_uint64_type_node c_global_trees[CTI_UINT64_TYPE]
364 #define int_least8_type_node c_global_trees[CTI_INT_LEAST8_TYPE]
365 #define int_least16_type_node c_global_trees[CTI_INT_LEAST16_TYPE]
366 #define int_least32_type_node c_global_trees[CTI_INT_LEAST32_TYPE]
367 #define int_least64_type_node c_global_trees[CTI_INT_LEAST64_TYPE]
368 #define uint_least8_type_node c_global_trees[CTI_UINT_LEAST8_TYPE]
369 #define uint_least16_type_node c_global_trees[CTI_UINT_LEAST16_TYPE]
370 #define uint_least32_type_node c_global_trees[CTI_UINT_LEAST32_TYPE]
371 #define uint_least64_type_node c_global_trees[CTI_UINT_LEAST64_TYPE]
372 #define int_fast8_type_node c_global_trees[CTI_INT_FAST8_TYPE]
373 #define int_fast16_type_node c_global_trees[CTI_INT_FAST16_TYPE]
374 #define int_fast32_type_node c_global_trees[CTI_INT_FAST32_TYPE]
375 #define int_fast64_type_node c_global_trees[CTI_INT_FAST64_TYPE]
376 #define uint_fast8_type_node c_global_trees[CTI_UINT_FAST8_TYPE]
377 #define uint_fast16_type_node c_global_trees[CTI_UINT_FAST16_TYPE]
378 #define uint_fast32_type_node c_global_trees[CTI_UINT_FAST32_TYPE]
379 #define uint_fast64_type_node c_global_trees[CTI_UINT_FAST64_TYPE]
380 #define intptr_type_node c_global_trees[CTI_INTPTR_TYPE]
381 #define uintptr_type_node c_global_trees[CTI_UINTPTR_TYPE]
383 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
384 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
385 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
387 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
388 #define char16_array_type_node c_global_trees[CTI_CHAR16_ARRAY_TYPE]
389 #define char32_array_type_node c_global_trees[CTI_CHAR32_ARRAY_TYPE]
390 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
391 #define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
392 #define string_type_node c_global_trees[CTI_STRING_TYPE]
393 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
395 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
397 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
398 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
399 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
400 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
402 /* A node for `((void) 0)'. */
403 #define void_zero_node c_global_trees[CTI_VOID_ZERO]
405 /* The node for C++ `__null'. */
406 #define null_node c_global_trees[CTI_NULL]
408 extern GTY(()) tree c_global_trees
[CTI_MAX
];
410 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
411 tree for size reasons. */
412 struct GTY((variable_size
)) sorted_fields_type
{
414 tree
GTY((length ("%h.len"))) elts
[1];
417 /* Mark which labels are explicitly declared.
418 These may be shadowed, and may be referenced from nested functions. */
419 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
421 typedef enum c_language_kind
423 clk_c
= 0, /* C90, C94 or C99 */
424 clk_objc
= 1, /* clk_c with ObjC features. */
425 clk_cxx
= 2, /* ANSI/ISO C++ */
426 clk_objcxx
= 3 /* clk_cxx with ObjC features. */
430 /* To test for a specific language use c_language, defined by each
431 front end. For "ObjC features" or "not C++" use the macros. */
432 extern c_language_kind c_language
;
434 #define c_dialect_cxx() ((c_language & clk_cxx) != 0)
435 #define c_dialect_objc() ((c_language & clk_objc) != 0)
437 /* ObjC ivar visibility types. */
438 typedef enum objc_ivar_visibility_kind
{
439 OBJC_IVAR_VIS_PROTECTED
= 0,
440 OBJC_IVAR_VIS_PUBLIC
= 1,
441 OBJC_IVAR_VIS_PRIVATE
= 2,
442 OBJC_IVAR_VIS_PACKAGE
= 3
443 } objc_ivar_visibility_kind
;
445 /* The various name of operator that appears in error messages. */
446 typedef enum ref_operator
{
455 /* implicit conversion */
456 RO_IMPLICIT_CONVERSION
459 /* Information about a statement tree. */
461 struct GTY(()) stmt_tree_s
{
462 /* The current statement list being collected. */
463 tree x_cur_stmt_list
;
465 /* In C++, Nonzero if we should treat statements as full
466 expressions. In particular, this variable is no-zero if at the
467 end of a statement we should destroy any temporaries created
468 during that statement. Similarly, if, at the end of a block, we
469 should destroy any local variables in this block. Normally, this
470 variable is nonzero, since those are the normal semantics of
473 However, in order to represent aggregate initialization code as
474 tree structure, we use statement-expressions. The statements
475 within the statement expression should not result in cleanups
476 being run until the entire enclosing statement is complete.
478 This flag has no effect in C. */
479 int stmts_are_full_exprs_p
;
482 typedef struct stmt_tree_s
*stmt_tree
;
484 /* Global state pertinent to the current function. Some C dialects
485 extend this structure with additional fields. */
487 struct GTY(()) c_language_function
{
488 /* While we are parsing the function, this contains information
489 about the statement-tree that we are building. */
490 struct stmt_tree_s x_stmt_tree
;
493 /* When building a statement-tree, this is the current statement list
494 being collected. It's TREE_CHAIN is a back-pointer to the previous
497 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
499 /* Language-specific hooks. */
501 /* If non-NULL, this function is called after a precompile header file
503 extern void (*lang_post_pch_load
) (void);
505 extern void push_file_scope (void);
506 extern void pop_file_scope (void);
507 extern stmt_tree
current_stmt_tree (void);
508 extern tree
push_stmt_list (void);
509 extern tree
pop_stmt_list (tree
);
510 extern tree
add_stmt (tree
);
511 extern void push_cleanup (tree
, tree
, bool);
512 extern tree
pushdecl_top_level (tree
);
513 extern tree
pushdecl (tree
);
514 extern tree
build_modify_expr (location_t
, tree
, tree
, enum tree_code
,
515 location_t
, tree
, tree
);
516 extern tree
build_indirect_ref (location_t
, tree
, ref_operator
);
518 extern int c_expand_decl (tree
);
520 extern int field_decl_cmp (const void *, const void *);
521 extern void resort_sorted_fields (void *, void *, gt_pointer_operator
,
523 extern bool has_c_linkage (const_tree decl
);
525 /* Switches common to the C front ends. */
527 /* Nonzero means don't output line number information. */
529 extern char flag_no_line_commands
;
531 /* Nonzero causes -E output not to be done, but directives such as
532 #define that have side effects are still obeyed. */
534 extern char flag_no_output
;
536 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
537 'N' or 'U' of the command line switch. */
539 extern char flag_dump_macros
;
541 /* Nonzero means pass #include lines through to the output. */
543 extern char flag_dump_includes
;
545 /* Nonzero means process PCH files while preprocessing. */
547 extern bool flag_pch_preprocess
;
549 /* The file name to which we should write a precompiled header, or
550 NULL if no header will be written in this compile. */
552 extern const char *pch_file
;
554 /* Nonzero if an ISO standard was selected. It rejects macros in the
559 /* Warn about #pragma directives that are not recognized. */
561 extern int warn_unknown_pragmas
; /* Tri state variable. */
563 /* Warn about format/argument anomalies in calls to formatted I/O functions
564 (*printf, *scanf, strftime, strfmon, etc.). */
566 extern int warn_format
;
569 /* C/ObjC language option variables. */
572 /* Nonzero means allow type mismatches in conditional expressions;
573 just make their values `void'. */
575 extern int flag_cond_mismatch
;
577 /* Nonzero means enable C89 Amendment 1 features. */
579 extern int flag_isoc94
;
581 /* Nonzero means use the ISO C99 (or C1X) dialect of C. */
583 extern int flag_isoc99
;
585 /* Nonzero means use the ISO C1X dialect of C. */
587 extern int flag_isoc1x
;
589 /* Nonzero means that we have builtin functions, and main is an int. */
591 extern int flag_hosted
;
593 /* ObjC language option variables. */
596 /* Tells the compiler that this is a special run. Do not perform any
597 compiling, instead we are to test some platform dependent features
598 and output a C header file with appropriate definitions. */
600 extern int print_struct_values
;
602 /* Tells the compiler what is the constant string class for ObjC. */
604 extern const char *constant_string_class_name
;
607 /* C++ language option variables. */
610 /* Nonzero means generate separate instantiation control files and
611 juggle them at link time. */
613 extern int flag_use_repository
;
615 /* The supported C++ dialects. */
620 /* Experimental features that are likely to become part of
625 /* The C++ dialect being used. C++98 is the default. */
626 extern enum cxx_dialect cxx_dialect
;
628 /* Maximum template instantiation depth. This limit is rather
629 arbitrary, but it exists to limit the time it takes to notice
630 infinite template instantiations. */
632 extern int max_tinst_depth
;
634 /* Nonzero means that we should not issue warnings about problems that
635 occur when the code is executed, because the code being processed
636 is not expected to be executed. This is set during parsing. This
637 is used for cases like sizeof() and "0 ? a : b". This is a count,
638 not a bool, because unexecuted expressions can nest. */
640 extern int c_inhibit_evaluation_warnings
;
642 /* Whether lexing has been completed, so subsequent preprocessor
643 errors should use the compiler's input_location. */
645 extern bool done_lexing
;
647 /* C types are partitioned into three subsets: object, function, and
649 #define C_TYPE_OBJECT_P(type) \
650 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
652 #define C_TYPE_INCOMPLETE_P(type) \
653 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
655 #define C_TYPE_FUNCTION_P(type) \
656 (TREE_CODE (type) == FUNCTION_TYPE)
658 /* For convenience we define a single macro to identify the class of
659 object or incomplete types. */
660 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
661 (!C_TYPE_FUNCTION_P (type))
663 /* Attribute table common to the C front ends. */
664 extern const struct attribute_spec c_common_attribute_table
[];
665 extern const struct attribute_spec c_common_format_attribute_table
[];
667 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
668 ID is the identifier to use, NAME is the string.
669 TYPE_DEP indicates whether it depends on type of the function or not
670 (i.e. __PRETTY_FUNCTION__). */
672 extern tree (*make_fname_decl
) (location_t
, tree
, int);
674 /* In c-decl.c and cp/tree.c. FIXME. */
675 extern void c_register_addr_space (const char *str
, addr_space_t as
);
678 extern const char *c_addr_space_name (addr_space_t as
);
679 extern tree
identifier_global_value (tree
);
680 extern void record_builtin_type (enum rid
, const char *, tree
);
681 extern tree
build_void_list_node (void);
682 extern void start_fname_decls (void);
683 extern void finish_fname_decls (void);
684 extern const char *fname_as_string (int);
685 extern tree
fname_decl (location_t
, unsigned, tree
);
687 extern void check_function_arguments (tree
, int, tree
*, tree
);
688 extern void check_function_arguments_recurse (void (*)
690 unsigned HOST_WIDE_INT
),
692 unsigned HOST_WIDE_INT
);
693 extern bool check_builtin_function_arguments (tree
, int, tree
*);
694 extern void check_function_format (tree
, int, tree
*);
695 extern void set_Wformat (int);
696 extern tree
handle_format_attribute (tree
*, tree
, tree
, int, bool *);
697 extern tree
handle_format_arg_attribute (tree
*, tree
, tree
, int, bool *);
698 extern bool attribute_takes_identifier_p (const_tree
);
699 extern bool c_common_handle_option (size_t, const char *, int, int,
700 const struct cl_option_handlers
*);
701 extern tree
c_common_type_for_mode (enum machine_mode
, int);
702 extern tree
c_common_type_for_size (unsigned int, int);
703 extern tree
c_common_fixed_point_type_for_size (unsigned int, unsigned int,
705 extern tree
c_common_unsigned_type (tree
);
706 extern tree
c_common_signed_type (tree
);
707 extern tree
c_common_signed_or_unsigned_type (int, tree
);
708 extern tree
c_build_bitfield_integer_type (unsigned HOST_WIDE_INT
, int);
709 extern bool decl_with_nonnull_addr_p (const_tree
);
710 extern tree
c_fully_fold (tree
, bool, bool *);
711 extern tree
decl_constant_value_for_optimization (tree
);
712 extern tree
c_wrap_maybe_const (tree
, bool);
713 extern tree
c_save_expr (tree
);
714 extern tree
c_common_truthvalue_conversion (location_t
, tree
);
715 extern void c_apply_type_quals_to_decl (int, tree
);
716 extern tree
c_sizeof_or_alignof_type (location_t
, tree
, bool, int);
717 extern tree
c_alignof_expr (location_t
, tree
);
718 /* Print an error message for invalid operands to arith operation CODE.
719 NOP_EXPR is used as a special case (see truthvalue_conversion). */
720 extern void binary_op_error (location_t
, enum tree_code
, tree
, tree
);
721 extern tree
fix_string_type (tree
);
722 extern void constant_expression_warning (tree
);
723 extern void constant_expression_error (tree
);
724 extern bool strict_aliasing_warning (tree
, tree
, tree
);
725 extern void warnings_for_convert_and_check (tree
, tree
, tree
);
726 extern tree
convert_and_check (tree
, tree
);
727 extern void overflow_warning (location_t
, tree
);
728 extern void warn_logical_operator (location_t
, enum tree_code
, tree
,
729 enum tree_code
, tree
, enum tree_code
, tree
);
730 extern void check_main_parameter_types (tree decl
);
731 extern bool c_determine_visibility (tree
);
732 extern bool same_scalar_type_ignoring_signedness (tree
, tree
);
733 extern void mark_valid_location_for_stdc_pragma (bool);
734 extern bool valid_location_for_stdc_pragma_p (void);
735 extern void set_float_const_decimal64 (void);
736 extern void clear_float_const_decimal64 (void);
737 extern bool float_const_decimal64_p (void);
739 #define c_sizeof(LOC, T) c_sizeof_or_alignof_type (LOC, T, true, 1)
740 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, 1)
742 /* Subroutine of build_binary_op, used for certain operations. */
743 extern tree
shorten_binary_op (tree result_type
, tree op0
, tree op1
, bool bitwise
);
745 /* Subroutine of build_binary_op, used for comparison operations.
746 See if the operands have both been converted from subword integer types
747 and, if so, perhaps change them both back to their original type. */
748 extern tree
shorten_compare (tree
*, tree
*, tree
*, enum tree_code
*);
750 extern tree
pointer_int_sum (location_t
, enum tree_code
, tree
, tree
);
752 /* Add qualifiers to a type, in the fashion for C. */
753 extern tree
c_build_qualified_type (tree
, int);
755 /* Build tree nodes and builtin functions common to both C and C++ language
757 extern void c_common_nodes_and_builtins (void);
759 extern void disable_builtin_function (const char *);
761 extern void set_compound_literal_name (tree decl
);
763 extern tree
build_va_arg (location_t
, tree
, tree
);
765 extern unsigned int c_common_option_lang_mask (void);
766 extern void c_common_initialize_diagnostics (diagnostic_context
*);
767 extern bool c_common_complain_wrong_lang_p (const struct cl_option
*);
768 extern void c_common_init_options_struct (struct gcc_options
*);
769 extern void c_common_init_options (unsigned int, struct cl_decoded_option
*);
770 extern bool c_common_post_options (const char **);
771 extern bool c_common_init (void);
772 extern void c_common_finish (void);
773 extern void c_common_parse_file (int);
774 extern alias_set_type
c_common_get_alias_set (tree
);
775 extern void c_register_builtin_type (tree
, const char*);
776 extern bool c_promoting_integer_type_p (const_tree
);
777 extern int self_promoting_args_p (const_tree
);
778 extern tree
strip_pointer_operator (tree
);
779 extern tree
strip_pointer_or_array_types (tree
);
780 extern HOST_WIDE_INT
c_common_to_target_charset (HOST_WIDE_INT
);
782 /* This is the basic parsing function. */
783 extern void c_parse_file (void);
785 extern void warn_for_omitted_condop (location_t
, tree
);
787 /* These macros provide convenient access to the various _STMT nodes. */
789 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
790 if a statement expression. */
791 #define STATEMENT_LIST_STMT_EXPR(NODE) \
792 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
794 /* Nonzero if a label has been added to the statement list. */
795 #define STATEMENT_LIST_HAS_LABEL(NODE) \
796 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
798 /* C_MAYBE_CONST_EXPR accessors. */
799 #define C_MAYBE_CONST_EXPR_PRE(NODE) \
800 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
801 #define C_MAYBE_CONST_EXPR_EXPR(NODE) \
802 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
803 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE) \
804 TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
805 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE) \
806 TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
807 #define EXPR_INT_CONST_OPERANDS(EXPR) \
808 (INTEGRAL_TYPE_P (TREE_TYPE (EXPR)) \
809 && (TREE_CODE (EXPR) == INTEGER_CST \
810 || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR \
811 && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
813 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
814 #define DECL_C_BIT_FIELD(NODE) \
815 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
816 #define SET_DECL_C_BIT_FIELD(NODE) \
817 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
818 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
819 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
821 extern tree
do_case (location_t
, tree
, tree
);
822 extern tree
build_stmt (location_t
, enum tree_code
, ...);
823 extern tree
build_case_label (location_t
, tree
, tree
, tree
);
825 /* These functions must be defined by each front-end which implements
826 a variant of the C language. They are used in c-common.c. */
828 extern tree
build_unary_op (location_t
, enum tree_code
, tree
, int);
829 extern tree
build_binary_op (location_t
, enum tree_code
, tree
, tree
, int);
830 extern tree
perform_integral_promotions (tree
);
832 /* These functions must be defined by each front-end which implements
833 a variant of the C language. They are used by port files. */
835 extern tree
default_conversion (tree
);
837 /* Given two integer or real types, return the type for their sum.
838 Given two compatible ANSI C types, returns the merged type. */
840 extern tree
common_type (tree
, tree
);
842 extern tree
decl_constant_value (tree
);
844 /* Handle increment and decrement of boolean types. */
845 extern tree
boolean_increment (enum tree_code
, tree
);
847 extern int case_compare (splay_tree_key
, splay_tree_key
);
849 extern tree
c_add_case_label (location_t
, splay_tree
, tree
, tree
, tree
, tree
);
851 extern void c_do_switch_warnings (splay_tree
, location_t
, tree
, tree
);
853 extern tree
build_function_call (location_t
, tree
, tree
);
855 extern tree
build_function_call_vec (location_t
, tree
,
856 VEC(tree
,gc
) *, VEC(tree
,gc
) *);
858 extern tree
resolve_overloaded_builtin (location_t
, tree
, VEC(tree
,gc
) *);
860 extern tree
finish_label_address_expr (tree
, location_t
);
862 /* Same function prototype, but the C and C++ front ends have
863 different implementations. Used in c-common.c. */
864 extern tree
lookup_label (tree
);
865 extern tree
lookup_name (tree
);
866 extern bool lvalue_p (const_tree
);
868 extern bool vector_targets_convertible_p (const_tree t1
, const_tree t2
);
869 extern bool vector_types_convertible_p (const_tree t1
, const_tree t2
, bool emit_lax_note
);
871 extern rtx
c_expand_expr (tree
, rtx
, enum machine_mode
, int, rtx
*);
873 extern void init_c_lex (void);
875 extern void c_cpp_builtins (cpp_reader
*);
876 extern void c_cpp_builtins_optimize_pragma (cpp_reader
*, tree
, tree
);
877 extern bool c_cpp_error (cpp_reader
*, int, int, location_t
, unsigned int,
878 const char *, va_list *)
879 ATTRIBUTE_GCC_DIAG(6,0);
881 /* Positive if an implicit `extern "C"' scope has just been entered;
882 negative if such a scope has just been exited. */
883 extern GTY(()) int pending_lang_change
;
885 /* Information recorded about each file examined during compilation. */
889 int time
; /* Time spent in the file. */
891 /* Flags used only by C++.
892 INTERFACE_ONLY nonzero means that we are in an "interface" section
893 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust
894 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and
895 INTERFACE_ONLY is zero, it means that we are responsible for
896 exporting definitions that others might need. */
897 short interface_only
;
898 short interface_unknown
;
901 struct c_fileinfo
*get_fileinfo (const char *);
902 extern void dump_time_statistics (void);
904 extern bool c_dump_tree (void *, tree
);
906 extern void verify_sequence_points (tree
);
908 extern tree
fold_offsetof (tree
, tree
);
910 /* Places where an lvalue, or modifiable lvalue, may be required.
911 Used to select diagnostic messages in lvalue_error and
921 extern void lvalue_error (enum lvalue_use
);
923 extern int complete_array_type (tree
*, tree
, bool);
925 extern tree
builtin_type_for_size (int, bool);
927 extern void c_common_mark_addressable_vec (tree
);
929 extern void warn_array_subscript_with_type_char (tree
);
930 extern void warn_about_parentheses (enum tree_code
,
931 enum tree_code
, tree
,
932 enum tree_code
, tree
);
933 extern void warn_for_unused_label (tree label
);
934 extern void warn_for_div_by_zero (location_t
, tree divisor
);
935 extern void warn_for_sign_compare (location_t
,
936 tree orig_op0
, tree orig_op1
,
939 enum tree_code resultcode
);
940 extern void do_warn_double_promotion (tree
, tree
, tree
, const char *,
942 extern void set_underlying_type (tree x
);
943 extern VEC(tree
,gc
) *make_tree_vector (void);
944 extern void release_tree_vector (VEC(tree
,gc
) *);
945 extern VEC(tree
,gc
) *make_tree_vector_single (tree
);
946 extern VEC(tree
,gc
) *make_tree_vector_copy (const VEC(tree
,gc
) *);
948 /* In c-gimplify.c */
949 extern void c_genericize (tree
);
950 extern int c_gimplify_expr (tree
*, gimple_seq
*, gimple_seq
*);
951 extern tree
c_build_bind_expr (location_t
, tree
, tree
);
954 extern void pch_init (void);
955 extern int c_common_valid_pch (cpp_reader
*pfile
, const char *name
, int fd
);
956 extern void c_common_read_pch (cpp_reader
*pfile
, const char *name
, int fd
,
958 extern void c_common_write_pch (void);
959 extern void c_common_no_more_pch (void);
960 extern void c_common_pch_pragma (cpp_reader
*pfile
, const char *);
961 extern void c_common_print_pch_checksum (FILE *f
);
963 /* In *-checksum.c */
964 extern const unsigned char executable_checksum
[16];
966 /* In c-cppbuiltin.c */
967 extern void builtin_define_std (const char *macro
);
968 extern void builtin_define_with_value (const char *, const char *, int);
969 extern void c_stddef_cpp_builtins (void);
970 extern void fe_file_change (const struct line_map
*);
971 extern void c_parse_error (const char *, enum cpp_ttype
, tree
, unsigned char);
973 /* Objective-C / Objective-C++ entry points. */
975 /* The following ObjC/ObjC++ functions are called by the C and/or C++
976 front-ends; they all must have corresponding stubs in stub-objc.c. */
977 extern void objc_write_global_declarations (void);
978 extern tree
objc_is_class_name (tree
);
979 extern tree
objc_is_object_ptr (tree
);
980 extern void objc_check_decl (tree
);
981 extern void objc_check_global_decl (tree
);
982 extern tree
objc_common_type (tree
, tree
);
983 extern tree
objc_non_volatilized_type (tree
);
984 extern bool objc_compare_types (tree
, tree
, int, tree
);
985 extern bool objc_have_common_type (tree
, tree
, int, tree
);
986 extern bool objc_diagnose_private_ivar (tree
);
987 extern void objc_volatilize_decl (tree
);
988 extern bool objc_type_quals_match (tree
, tree
);
989 extern tree
objc_rewrite_function_call (tree
, tree
);
990 extern tree
objc_message_selector (void);
991 extern tree
objc_lookup_ivar (tree
, tree
);
992 extern void objc_clear_super_receiver (void);
993 extern int objc_is_public (tree
, tree
);
994 extern tree
objc_is_id (tree
);
995 extern void objc_declare_alias (tree
, tree
);
996 extern void objc_declare_class (tree
);
997 extern void objc_declare_protocols (tree
);
998 extern tree
objc_build_message_expr (tree
);
999 extern tree
objc_finish_message_expr (tree
, tree
, tree
);
1000 extern tree
objc_build_selector_expr (location_t
, tree
);
1001 extern tree
objc_build_protocol_expr (tree
);
1002 extern tree
objc_build_encode_expr (tree
);
1003 extern tree
objc_build_string_object (tree
);
1004 extern tree
objc_get_protocol_qualified_type (tree
, tree
);
1005 extern tree
objc_get_class_reference (tree
);
1006 extern tree
objc_get_class_ivars (tree
);
1007 extern tree
objc_get_interface_ivars (tree
);
1008 extern void objc_start_class_interface (tree
, tree
, tree
, tree
);
1009 extern void objc_start_category_interface (tree
, tree
, tree
, tree
);
1010 extern void objc_start_protocol (tree
, tree
, tree
);
1011 extern void objc_continue_interface (void);
1012 extern void objc_finish_interface (void);
1013 extern void objc_start_class_implementation (tree
, tree
);
1014 extern void objc_start_category_implementation (tree
, tree
);
1015 extern void objc_continue_implementation (void);
1016 extern void objc_finish_implementation (void);
1017 extern void objc_set_visibility (objc_ivar_visibility_kind
);
1018 extern tree
objc_build_method_signature (bool, tree
, tree
, tree
, bool);
1019 extern void objc_add_method_declaration (bool, tree
, tree
);
1020 extern bool objc_start_method_definition (bool, tree
, tree
);
1021 extern void objc_finish_method_definition (tree
);
1022 extern void objc_add_instance_variable (tree
);
1023 extern tree
objc_build_keyword_decl (tree
, tree
, tree
, tree
);
1024 extern tree
objc_build_throw_stmt (location_t
, tree
);
1025 extern void objc_begin_try_stmt (location_t
, tree
);
1026 extern tree
objc_finish_try_stmt (void);
1027 extern void objc_begin_catch_clause (tree
);
1028 extern void objc_finish_catch_clause (void);
1029 extern void objc_build_finally_clause (location_t
, tree
);
1030 extern tree
objc_build_synchronized (location_t
, tree
, tree
);
1031 extern int objc_static_init_needed_p (void);
1032 extern tree
objc_generate_static_init_call (tree
);
1033 extern tree
objc_generate_write_barrier (tree
, enum tree_code
, tree
);
1034 extern void objc_set_method_opt (bool);
1035 extern void objc_finish_foreach_loop (location_t
, tree
, tree
, tree
, tree
, tree
);
1036 extern bool objc_method_decl (enum tree_code
);
1037 extern void objc_add_property_declaration (location_t
, tree
, bool, bool, bool,
1038 bool, bool, bool, tree
, tree
);
1039 extern tree
objc_maybe_build_component_ref (tree
, tree
);
1040 extern tree
objc_build_class_component_ref (tree
, tree
);
1041 extern tree
objc_maybe_build_modify_expr (tree
, tree
);
1042 extern void objc_add_synthesize_declaration (location_t
, tree
);
1043 extern void objc_add_dynamic_declaration (location_t
, tree
);
1044 extern const char * objc_maybe_printable_name (tree
, int);
1045 extern bool objc_is_property_ref (tree
);
1047 /* The following are provided by the C and C++ front-ends, and called by
1049 extern void *objc_get_current_scope (void);
1050 extern void objc_mark_locals_volatile (void *);
1052 /* In c-ppoutput.c */
1053 extern void init_pp_output (FILE *);
1054 extern void preprocess_file (cpp_reader
*);
1055 extern void pp_file_change (const struct line_map
*);
1056 extern void pp_dir_change (cpp_reader
*, const char *);
1057 extern bool check_missing_format_attribute (tree
, tree
);
1060 extern tree
c_finish_omp_master (location_t
, tree
);
1061 extern tree
c_finish_omp_critical (location_t
, tree
, tree
);
1062 extern tree
c_finish_omp_ordered (location_t
, tree
);
1063 extern void c_finish_omp_barrier (location_t
);
1064 extern tree
c_finish_omp_atomic (location_t
, enum tree_code
, tree
, tree
);
1065 extern void c_finish_omp_flush (location_t
);
1066 extern void c_finish_omp_taskwait (location_t
);
1067 extern tree
c_finish_omp_for (location_t
, tree
, tree
, tree
, tree
, tree
, tree
);
1068 extern void c_split_parallel_clauses (location_t
, tree
, tree
*, tree
*);
1069 extern enum omp_clause_default_kind
c_omp_predetermined_sharing (tree
);
1071 /* Not in c-omp.c; provided by the front end. */
1072 extern bool c_omp_sharing_predetermined (tree
);
1073 extern tree
c_omp_remap_decl (tree
, bool);
1074 extern void record_types_used_by_current_var_decl (tree
);
1076 #endif /* ! GCC_C_COMMON_H */