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, 2011
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: IDENTIFIER_MARKED (used by search routines).
47 DECL_PRETTY_FUNCTION_P (in VAR_DECL)
48 C_MAYBE_CONST_EXPR_INT_OPERANDS (in C_MAYBE_CONST_EXPR, for C)
49 1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
50 STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
51 C_MAYBE_CONST_EXPR_NON_CONST (in C_MAYBE_CONST_EXPR, for C)
53 3: STATEMENT_LIST_HAS_LABEL (in STATEMENT_LIST)
57 /* Reserved identifiers. This is the union of all the keywords for C,
58 C++, and Objective-C. All the type modifiers have to be in one
59 block at the beginning, because they are used as mask bits. There
60 are 28 type modifiers; if we add many more we will have to redesign
61 the mask mechanism. */
66 /* C, in empirical order of frequency. */
68 RID_UNSIGNED, RID_LONG, RID_CONST, RID_EXTERN,
69 RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
70 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, RID_BUILTIN_COMPLEX, RID_BUILTIN_SHUFFLE,
106 RID_DFLOAT32, RID_DFLOAT64, RID_DFLOAT128,
107 RID_FRACT, RID_ACCUM,
112 /* This means to warn that this is a C++ keyword, and then treat it
113 as a normal identifier. */
116 /* Too many ways of getting the name of a function as a string */
117 RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
119 /* C++ (some of these are keywords in Objective-C as well, but only
120 if they appear after a '@') */
121 RID_BOOL, RID_WCHAR, RID_CLASS,
122 RID_PUBLIC, RID_PRIVATE, RID_PROTECTED,
123 RID_TEMPLATE, RID_NULL, RID_CATCH,
124 RID_DELETE, RID_FALSE, RID_NAMESPACE,
125 RID_NEW, RID_OFFSETOF, RID_OPERATOR,
126 RID_THIS, RID_THROW, RID_TRUE,
127 RID_TRY, RID_TYPENAME, RID_TYPEID,
128 RID_USING, RID_CHAR16, RID_CHAR32,
131 RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
134 RID_BASES, RID_DIRECT_BASES,
135 RID_HAS_NOTHROW_ASSIGN, RID_HAS_NOTHROW_CONSTRUCTOR,
136 RID_HAS_NOTHROW_COPY, RID_HAS_TRIVIAL_ASSIGN,
137 RID_HAS_TRIVIAL_CONSTRUCTOR, RID_HAS_TRIVIAL_COPY,
138 RID_HAS_TRIVIAL_DESTRUCTOR, RID_HAS_VIRTUAL_DESTRUCTOR,
139 RID_IS_ABSTRACT, RID_IS_BASE_OF,
140 RID_IS_CLASS, RID_IS_CONVERTIBLE_TO,
141 RID_IS_EMPTY, RID_IS_ENUM,
142 RID_IS_LITERAL_TYPE, RID_IS_POD,
143 RID_IS_POLYMORPHIC, RID_IS_STD_LAYOUT,
144 RID_IS_TRIVIAL, RID_IS_UNION,
148 RID_CONSTEXPR, RID_DECLTYPE, RID_NOEXCEPT, RID_NULLPTR, RID_STATIC_ASSERT,
150 /* Objective-C ("AT" reserved words - they are only keywords when
152 RID_AT_ENCODE, RID_AT_END,
153 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS,
154 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC, RID_AT_PACKAGE,
155 RID_AT_PROTOCOL, RID_AT_SELECTOR,
156 RID_AT_THROW, RID_AT_TRY, RID_AT_CATCH,
157 RID_AT_FINALLY, RID_AT_SYNCHRONIZED,
158 RID_AT_OPTIONAL, RID_AT_REQUIRED, RID_AT_PROPERTY,
159 RID_AT_SYNTHESIZE, RID_AT_DYNAMIC,
161 RID_AT_IMPLEMENTATION,
163 /* Named address support, mapping the keyword to a particular named address
164 number. Named address space 0 is reserved for the generic address. If
165 there are more than 254 named addresses, the addr_space_t type will need
166 to be grown from an unsigned char to unsigned short. */
167 RID_ADDR_SPACE_0, /* generic address */
184 RID_FIRST_ADDR_SPACE = RID_ADDR_SPACE_0,
185 RID_LAST_ADDR_SPACE = RID_ADDR_SPACE_15,
189 RID_FIRST_MODIFIER = RID_STATIC,
190 RID_LAST_MODIFIER = RID_ONEWAY,
192 RID_FIRST_CXX0X = RID_CONSTEXPR,
193 RID_LAST_CXX0X = RID_STATIC_ASSERT,
194 RID_FIRST_AT = RID_AT_ENCODE,
195 RID_LAST_AT = RID_AT_IMPLEMENTATION,
196 RID_FIRST_PQ = RID_IN,
197 RID_LAST_PQ = RID_ONEWAY,
198 RID_FIRST_PATTR = RID_GETTER,
199 RID_LAST_PATTR = RID_NONATOMIC
202 #define OBJC_IS_AT_KEYWORD(rid) \
203 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
204 (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
206 #define OBJC_IS_PQ_KEYWORD(rid) \
207 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
208 (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
210 #define OBJC_IS_PATTR_KEYWORD(rid) \
211 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PATTR && \
212 (unsigned int) (rid) <= (unsigned int) RID_LAST_PATTR)
214 /* OBJC_IS_CXX_KEYWORD recognizes the 'CXX_OBJC' keywords (such as
215 'class') which are shared in a subtle way between Objective-C and
216 C++. When the lexer is lexing in Objective-C/Objective-C++, if it
217 finds '@' followed by one of these identifiers (eg, '@class'), it
218 recognizes the whole as an Objective-C keyword. If the identifier
219 is found elsewhere, it follows the rules of the C/C++ language.
221 #define OBJC_IS_CXX_KEYWORD(rid) \
223 || rid == RID_PUBLIC || rid == RID_PROTECTED || rid == RID_PRIVATE \
224 || rid == RID_TRY || rid == RID_THROW || rid == RID_CATCH)
226 /* The elements of `ridpointers' are identifier nodes for the reserved
227 type names and storage classes. It is indexed by a RID_... value. */
228 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
230 /* Standard named or nameless data types of the C compiler. */
237 CTI_UNDERLYING_WCHAR_TYPE,
239 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
240 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
243 CTI_WIDEST_INT_LIT_TYPE,
244 CTI_WIDEST_UINT_LIT_TYPE,
246 /* Types for <stdint.h>, that may not be defined on all
258 CTI_INT_LEAST16_TYPE,
259 CTI_INT_LEAST32_TYPE,
260 CTI_INT_LEAST64_TYPE,
261 CTI_UINT_LEAST8_TYPE,
262 CTI_UINT_LEAST16_TYPE,
263 CTI_UINT_LEAST32_TYPE,
264 CTI_UINT_LEAST64_TYPE,
270 CTI_UINT_FAST16_TYPE,
271 CTI_UINT_FAST32_TYPE,
272 CTI_UINT_FAST64_TYPE,
277 CTI_CHAR16_ARRAY_TYPE,
278 CTI_CHAR32_ARRAY_TYPE,
279 CTI_WCHAR_ARRAY_TYPE,
282 CTI_CONST_STRING_TYPE,
284 /* Type for boolean expressions (bool in C++, int in C). */
287 CTI_TRUTHVALUE_FALSE,
289 CTI_DEFAULT_FUNCTION_TYPE,
291 /* These are not types, but we have to look them up all the time. */
292 CTI_FUNCTION_NAME_DECL,
293 CTI_PRETTY_FUNCTION_NAME_DECL,
294 CTI_C99_FUNCTION_NAME_DECL,
295 CTI_SAVED_FUNCTION_NAME_DECLS,
304 #define C_CPP_HASHNODE(id) \
305 (&(((struct c_common_identifier *) (id))->node))
306 #define C_RID_CODE(id) \
307 ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
308 #define C_SET_RID_CODE(id, code) \
309 (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
311 /* Identifier part common to the C front ends. Inherits from
312 tree_identifier, despite appearances. */
313 struct GTY(()) c_common_identifier {
314 struct tree_common common;
315 struct cpp_hashnode node;
318 /* An entry in the reserved keyword table. */
320 struct c_common_resword
322 const char *const word;
323 ENUM_BITFIELD(rid) const rid : 16;
324 const unsigned int disable : 16;
327 /* Extra cpp_ttype values for C++. */
329 /* A token type for keywords, as opposed to ordinary identifiers. */
330 #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1))
332 /* A token type for template-ids. If a template-id is processed while
333 parsing tentatively, it is replaced with a CPP_TEMPLATE_ID token;
334 the value of the CPP_TEMPLATE_ID is whatever was returned by
335 cp_parser_template_id. */
336 #define CPP_TEMPLATE_ID ((enum cpp_ttype) (CPP_KEYWORD + 1))
338 /* A token type for nested-name-specifiers. If a
339 nested-name-specifier is processed while parsing tentatively, it is
340 replaced with a CPP_NESTED_NAME_SPECIFIER token; the value of the
341 CPP_NESTED_NAME_SPECIFIER is whatever was returned by
342 cp_parser_nested_name_specifier_opt. */
343 #define CPP_NESTED_NAME_SPECIFIER ((enum cpp_ttype) (CPP_TEMPLATE_ID + 1))
345 /* A token type for pre-parsed C++0x decltype. */
346 #define CPP_DECLTYPE ((enum cpp_ttype) (CPP_NESTED_NAME_SPECIFIER + 1))
348 /* The number of token types, including C++-specific ones. */
349 #define N_CP_TTYPES ((int) (CPP_DECLTYPE + 1))
351 /* Disable mask. Keywords are disabled if (reswords[i].disable &
352 mask) is _true_. Thus for keywords which are present in all
353 languages the disable field is zero. */
355 #define D_CONLY 0x001 /* C only (not in C++). */
356 #define D_CXXONLY 0x002 /* C++ only (not in C). */
357 #define D_C99 0x004 /* In C, C99 only. */
358 #define D_CXX0X 0x008 /* In C++, C++0X only. */
359 #define D_EXT 0x010 /* GCC extension. */
360 #define D_EXT89 0x020 /* GCC extension incorporated in C99. */
361 #define D_ASM 0x040 /* Disabled by -fno-asm. */
362 #define D_OBJC 0x080 /* In Objective C and neither C nor C++. */
363 #define D_CXX_OBJC 0x100 /* In Objective C, and C++, but not C. */
364 #define D_CXXWARN 0x200 /* In C warn with -Wcxx-compat. */
366 /* The reserved keyword table. */
367 extern const struct c_common_resword c_common_reswords[];
369 /* The number of items in the reserved keyword table. */
370 extern const unsigned int num_c_common_reswords;
372 #define char16_type_node c_global_trees[CTI_CHAR16_TYPE]
373 #define char32_type_node c_global_trees[CTI_CHAR32_TYPE]
374 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
375 #define underlying_wchar_type_node c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
376 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
377 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
378 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
379 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
380 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
381 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
382 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
384 #define sig_atomic_type_node c_global_trees[CTI_SIG_ATOMIC_TYPE]
385 #define int8_type_node c_global_trees[CTI_INT8_TYPE]
386 #define int16_type_node c_global_trees[CTI_INT16_TYPE]
387 #define int32_type_node c_global_trees[CTI_INT32_TYPE]
388 #define int64_type_node c_global_trees[CTI_INT64_TYPE]
389 #define uint8_type_node c_global_trees[CTI_UINT8_TYPE]
390 #define uint16_type_node c_global_trees[CTI_UINT16_TYPE]
391 #define c_uint32_type_node c_global_trees[CTI_UINT32_TYPE]
392 #define c_uint64_type_node c_global_trees[CTI_UINT64_TYPE]
393 #define int_least8_type_node c_global_trees[CTI_INT_LEAST8_TYPE]
394 #define int_least16_type_node c_global_trees[CTI_INT_LEAST16_TYPE]
395 #define int_least32_type_node c_global_trees[CTI_INT_LEAST32_TYPE]
396 #define int_least64_type_node c_global_trees[CTI_INT_LEAST64_TYPE]
397 #define uint_least8_type_node c_global_trees[CTI_UINT_LEAST8_TYPE]
398 #define uint_least16_type_node c_global_trees[CTI_UINT_LEAST16_TYPE]
399 #define uint_least32_type_node c_global_trees[CTI_UINT_LEAST32_TYPE]
400 #define uint_least64_type_node c_global_trees[CTI_UINT_LEAST64_TYPE]
401 #define int_fast8_type_node c_global_trees[CTI_INT_FAST8_TYPE]
402 #define int_fast16_type_node c_global_trees[CTI_INT_FAST16_TYPE]
403 #define int_fast32_type_node c_global_trees[CTI_INT_FAST32_TYPE]
404 #define int_fast64_type_node c_global_trees[CTI_INT_FAST64_TYPE]
405 #define uint_fast8_type_node c_global_trees[CTI_UINT_FAST8_TYPE]
406 #define uint_fast16_type_node c_global_trees[CTI_UINT_FAST16_TYPE]
407 #define uint_fast32_type_node c_global_trees[CTI_UINT_FAST32_TYPE]
408 #define uint_fast64_type_node c_global_trees[CTI_UINT_FAST64_TYPE]
409 #define intptr_type_node c_global_trees[CTI_INTPTR_TYPE]
410 #define uintptr_type_node c_global_trees[CTI_UINTPTR_TYPE]
412 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
413 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
414 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
416 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
417 #define char16_array_type_node c_global_trees[CTI_CHAR16_ARRAY_TYPE]
418 #define char32_array_type_node c_global_trees[CTI_CHAR32_ARRAY_TYPE]
419 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
420 #define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
421 #define string_type_node c_global_trees[CTI_STRING_TYPE]
422 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
424 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
426 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
427 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
428 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
429 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
431 /* A node for `((void) 0)'. */
432 #define void_zero_node c_global_trees[CTI_VOID_ZERO]
434 /* The node for C++ `__null'. */
435 #define null_node c_global_trees[CTI_NULL]
437 extern GTY(()) tree c_global_trees[CTI_MAX];
439 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
440 tree for size reasons. */
441 struct GTY((variable_size)) sorted_fields_type {
443 tree GTY((length ("%h.len"))) elts[1];
446 /* Mark which labels are explicitly declared.
447 These may be shadowed, and may be referenced from nested functions. */
448 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
450 typedef enum c_language_kind
452 clk_c = 0, /* C90, C94 or C99 */
453 clk_objc = 1, /* clk_c with ObjC features. */
454 clk_cxx = 2, /* ANSI/ISO C++ */
455 clk_objcxx = 3 /* clk_cxx with ObjC features. */
459 /* To test for a specific language use c_language, defined by each
460 front end. For "ObjC features" or "not C++" use the macros. */
461 extern c_language_kind c_language;
463 #define c_dialect_cxx() ((c_language & clk_cxx) != 0)
464 #define c_dialect_objc() ((c_language & clk_objc) != 0)
466 /* The various name of operator that appears in error messages. */
467 typedef enum ref_operator {
476 /* implicit conversion */
477 RO_IMPLICIT_CONVERSION
480 /* Information about a statement tree. */
482 struct GTY(()) stmt_tree_s {
483 /* A stack of statement lists being collected. */
484 VEC(tree,gc) *x_cur_stmt_list;
486 /* In C++, Nonzero if we should treat statements as full
487 expressions. In particular, this variable is no-zero if at the
488 end of a statement we should destroy any temporaries created
489 during that statement. Similarly, if, at the end of a block, we
490 should destroy any local variables in this block. Normally, this
491 variable is nonzero, since those are the normal semantics of
494 However, in order to represent aggregate initialization code as
495 tree structure, we use statement-expressions. The statements
496 within the statement expression should not result in cleanups
497 being run until the entire enclosing statement is complete.
499 This flag has no effect in C. */
500 int stmts_are_full_exprs_p;
503 typedef struct stmt_tree_s *stmt_tree;
505 /* Global state pertinent to the current function. Some C dialects
506 extend this structure with additional fields. */
508 struct GTY(()) c_language_function {
509 /* While we are parsing the function, this contains information
510 about the statement-tree that we are building. */
511 struct stmt_tree_s x_stmt_tree;
513 /* Vector of locally defined typedefs, for
514 -Wunused-local-typedefs. */
515 VEC(tree,gc) *local_typedefs;
518 #define stmt_list_stack (current_stmt_tree ()->x_cur_stmt_list)
520 /* When building a statement-tree, this is the current statement list
521 being collected. We define it in this convoluted way, rather than
522 using VEC_last, because it must be an lvalue. */
524 #define cur_stmt_list \
525 (*(VEC_address (tree, stmt_list_stack) \
526 + VEC_length (tree, stmt_list_stack) - 1))
528 #define building_stmt_list_p() (!VEC_empty (tree, stmt_list_stack))
530 /* Language-specific hooks. */
532 /* If non-NULL, this function is called after a precompile header file
534 extern void (*lang_post_pch_load) (void);
536 extern void push_file_scope (void);
537 extern void pop_file_scope (void);
538 extern stmt_tree current_stmt_tree (void);
539 extern tree push_stmt_list (void);
540 extern tree pop_stmt_list (tree);
541 extern tree add_stmt (tree);
542 extern void push_cleanup (tree, tree, bool);
543 extern tree pushdecl_top_level (tree);
544 extern tree pushdecl (tree);
545 extern tree build_modify_expr (location_t, tree, tree, enum tree_code,
546 location_t, tree, tree);
547 extern tree build_indirect_ref (location_t, tree, ref_operator);
549 extern int c_expand_decl (tree);
551 extern int field_decl_cmp (const void *, const void *);
552 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
554 extern bool has_c_linkage (const_tree decl);
556 /* Switches common to the C front ends. */
558 /* Nonzero means don't output line number information. */
560 extern char flag_no_line_commands;
562 /* Nonzero causes -E output not to be done, but directives such as
563 #define that have side effects are still obeyed. */
565 extern char flag_no_output;
567 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
568 'N' or 'U' of the command line switch. */
570 extern char flag_dump_macros;
572 /* Nonzero means pass #include lines through to the output. */
574 extern char flag_dump_includes;
576 /* Nonzero means process PCH files while preprocessing. */
578 extern bool flag_pch_preprocess;
580 /* The file name to which we should write a precompiled header, or
581 NULL if no header will be written in this compile. */
583 extern const char *pch_file;
585 /* Nonzero if an ISO standard was selected. It rejects macros in the
590 /* Warn about #pragma directives that are not recognized. */
592 extern int warn_unknown_pragmas; /* Tri state variable. */
594 /* Warn about format/argument anomalies in calls to formatted I/O functions
595 (*printf, *scanf, strftime, strfmon, etc.). */
597 extern int warn_format;
600 /* C/ObjC language option variables. */
603 /* Nonzero means allow type mismatches in conditional expressions;
604 just make their values `void'. */
606 extern int flag_cond_mismatch;
608 /* Nonzero means enable C89 Amendment 1 features. */
610 extern int flag_isoc94;
612 /* Nonzero means use the ISO C99 (or C1X) dialect of C. */
614 extern int flag_isoc99;
616 /* Nonzero means use the ISO C1X dialect of C. */
618 extern int flag_isoc1x;
620 /* Nonzero means that we have builtin functions, and main is an int. */
622 extern int flag_hosted;
624 /* ObjC language option variables. */
627 /* Tells the compiler that this is a special run. Do not perform any
628 compiling, instead we are to test some platform dependent features
629 and output a C header file with appropriate definitions. */
631 extern int print_struct_values;
633 /* Tells the compiler what is the constant string class for ObjC. */
635 extern const char *constant_string_class_name;
638 /* C++ language option variables. */
641 /* Nonzero means generate separate instantiation control files and
642 juggle them at link time. */
644 extern int flag_use_repository;
646 /* The supported C++ dialects. */
657 /* The C++ dialect being used. C++98 is the default. */
658 extern enum cxx_dialect cxx_dialect;
660 /* Maximum template instantiation depth. This limit is rather
661 arbitrary, but it exists to limit the time it takes to notice
662 excessively recursive template instantiations. */
664 extern int max_tinst_depth;
666 /* Nonzero means that we should not issue warnings about problems that
667 occur when the code is executed, because the code being processed
668 is not expected to be executed. This is set during parsing. This
669 is used for cases like sizeof() and "0 ? a : b". This is a count,
670 not a bool, because unexecuted expressions can nest. */
672 extern int c_inhibit_evaluation_warnings;
674 /* Whether lexing has been completed, so subsequent preprocessor
675 errors should use the compiler's input_location. */
677 extern bool done_lexing;
679 /* C types are partitioned into three subsets: object, function, and
681 #define C_TYPE_OBJECT_P(type) \
682 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
684 #define C_TYPE_INCOMPLETE_P(type) \
685 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
687 #define C_TYPE_FUNCTION_P(type) \
688 (TREE_CODE (type) == FUNCTION_TYPE)
690 /* For convenience we define a single macro to identify the class of
691 object or incomplete types. */
692 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
693 (!C_TYPE_FUNCTION_P (type))
695 struct visibility_flags
697 unsigned inpragma : 1; /* True when in #pragma GCC visibility. */
698 unsigned inlines_hidden : 1; /* True when -finlineshidden in effect. */
701 /* Global visibility options. */
702 extern struct visibility_flags visibility_options;
704 /* Attribute table common to the C front ends. */
705 extern const struct attribute_spec c_common_attribute_table[];
706 extern const struct attribute_spec c_common_format_attribute_table[];
708 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
709 ID is the identifier to use, NAME is the string.
710 TYPE_DEP indicates whether it depends on type of the function or not
711 (i.e. __PRETTY_FUNCTION__). */
713 extern tree (*make_fname_decl) (location_t, tree, int);
715 /* In c-decl.c and cp/tree.c. FIXME. */
716 extern void c_register_addr_space (const char *str, addr_space_t as);
719 extern bool in_late_binary_op;
720 extern const char *c_addr_space_name (addr_space_t as);
721 extern tree identifier_global_value (tree);
722 extern tree c_linkage_bindings (tree);
723 extern void record_builtin_type (enum rid, const char *, tree);
724 extern tree build_void_list_node (void);
725 extern void start_fname_decls (void);
726 extern void finish_fname_decls (void);
727 extern const char *fname_as_string (int);
728 extern tree fname_decl (location_t, unsigned, tree);
730 extern int check_user_alignment (const_tree, bool);
731 extern void check_function_arguments (const_tree, int, tree *);
732 extern void check_function_arguments_recurse (void (*)
734 unsigned HOST_WIDE_INT),
736 unsigned HOST_WIDE_INT);
737 extern bool check_builtin_function_arguments (tree, int, tree *);
738 extern void check_function_format (tree, int, tree *);
739 extern void set_Wformat (int);
740 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
741 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
742 extern bool attribute_takes_identifier_p (const_tree);
743 extern bool c_common_handle_option (size_t, const char *, int, int, location_t,
744 const struct cl_option_handlers *);
745 extern bool default_handle_c_option (size_t, const char *, int);
746 extern tree c_common_type_for_mode (enum machine_mode, int);
747 extern tree c_common_type_for_size (unsigned int, int);
748 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
750 extern tree c_common_unsigned_type (tree);
751 extern tree c_common_signed_type (tree);
752 extern tree c_common_signed_or_unsigned_type (int, tree);
753 extern void c_common_init_ts (void);
754 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
755 extern bool unsafe_conversion_p (tree, tree, bool);
756 extern bool decl_with_nonnull_addr_p (const_tree);
757 extern tree c_fully_fold (tree, bool, bool *);
758 extern tree decl_constant_value_for_optimization (tree);
759 extern tree c_wrap_maybe_const (tree, bool);
760 extern tree c_save_expr (tree);
761 extern tree c_common_truthvalue_conversion (location_t, tree);
762 extern void c_apply_type_quals_to_decl (int, tree);
763 extern tree c_sizeof_or_alignof_type (location_t, tree, bool, int);
764 extern tree c_alignof_expr (location_t, tree);
765 /* Print an error message for invalid operands to arith operation CODE.
766 NOP_EXPR is used as a special case (see truthvalue_conversion). */
767 extern void binary_op_error (location_t, enum tree_code, tree, tree);
768 extern tree fix_string_type (tree);
769 extern void constant_expression_warning (tree);
770 extern void constant_expression_error (tree);
771 extern bool strict_aliasing_warning (tree, tree, tree);
772 extern void warnings_for_convert_and_check (tree, tree, tree);
773 extern tree convert_and_check (tree, tree);
774 extern void overflow_warning (location_t, tree);
775 extern void warn_logical_operator (location_t, enum tree_code, tree,
776 enum tree_code, tree, enum tree_code, tree);
777 extern void check_main_parameter_types (tree decl);
778 extern bool decl_has_visibility_attr (tree);
779 extern bool c_determine_visibility (tree);
780 extern bool same_scalar_type_ignoring_signedness (tree, tree);
781 extern void mark_valid_location_for_stdc_pragma (bool);
782 extern bool valid_location_for_stdc_pragma_p (void);
783 extern void set_float_const_decimal64 (void);
784 extern void clear_float_const_decimal64 (void);
785 extern bool float_const_decimal64_p (void);
787 extern bool keyword_begins_type_specifier (enum rid);
788 extern bool keyword_is_storage_class_specifier (enum rid);
789 extern bool keyword_is_type_qualifier (enum rid);
790 extern bool keyword_is_decl_specifier (enum rid);
792 #define c_sizeof(LOC, T) c_sizeof_or_alignof_type (LOC, T, true, 1)
793 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, 1)
795 /* Subroutine of build_binary_op, used for certain operations. */
796 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
798 /* Subroutine of build_binary_op, used for comparison operations.
799 See if the operands have both been converted from subword integer types
800 and, if so, perhaps change them both back to their original type. */
801 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
803 extern tree pointer_int_sum (location_t, enum tree_code, tree, tree);
805 /* Add qualifiers to a type, in the fashion for C. */
806 extern tree c_build_qualified_type (tree, int);
808 /* Build tree nodes and builtin functions common to both C and C++ language
810 extern void c_common_nodes_and_builtins (void);
812 extern void disable_builtin_function (const char *);
814 extern void set_compound_literal_name (tree decl);
816 extern tree build_va_arg (location_t, tree, tree);
818 extern const unsigned int c_family_lang_mask;
819 extern unsigned int c_common_option_lang_mask (void);
820 extern void c_common_initialize_diagnostics (diagnostic_context *);
821 extern bool c_common_complain_wrong_lang_p (const struct cl_option *);
822 extern void c_common_init_options_struct (struct gcc_options *);
823 extern void c_common_init_options (unsigned int, struct cl_decoded_option *);
824 extern bool c_common_post_options (const char **);
825 extern bool c_common_init (void);
826 extern void c_common_finish (void);
827 extern void c_common_parse_file (void);
828 extern alias_set_type c_common_get_alias_set (tree);
829 extern void c_register_builtin_type (tree, const char*);
830 extern bool c_promoting_integer_type_p (const_tree);
831 extern int self_promoting_args_p (const_tree);
832 extern tree strip_pointer_operator (tree);
833 extern tree strip_pointer_or_array_types (tree);
834 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
836 /* This is the basic parsing function. */
837 extern void c_parse_file (void);
839 extern void warn_for_omitted_condop (location_t, tree);
841 /* These macros provide convenient access to the various _STMT nodes. */
843 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
844 if a statement expression. */
845 #define STATEMENT_LIST_STMT_EXPR(NODE) \
846 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
848 /* Nonzero if a label has been added to the statement list. */
849 #define STATEMENT_LIST_HAS_LABEL(NODE) \
850 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
852 /* C_MAYBE_CONST_EXPR accessors. */
853 #define C_MAYBE_CONST_EXPR_PRE(NODE) \
854 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
855 #define C_MAYBE_CONST_EXPR_EXPR(NODE) \
856 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
857 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE) \
858 TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
859 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE) \
860 TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
861 #define EXPR_INT_CONST_OPERANDS(EXPR) \
862 (INTEGRAL_TYPE_P (TREE_TYPE (EXPR)) \
863 && (TREE_CODE (EXPR) == INTEGER_CST \
864 || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR \
865 && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
867 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
868 #define DECL_C_BIT_FIELD(NODE) \
869 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
870 #define SET_DECL_C_BIT_FIELD(NODE) \
871 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
872 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
873 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
875 extern tree do_case (location_t, tree, tree);
876 extern tree build_stmt (location_t, enum tree_code, ...);
877 extern tree build_real_imag_expr (location_t, enum tree_code, tree);
879 /* These functions must be defined by each front-end which implements
880 a variant of the C language. They are used in c-common.c. */
882 extern tree build_unary_op (location_t, enum tree_code, tree, int);
883 extern tree build_binary_op (location_t, enum tree_code, tree, tree, int);
884 extern tree perform_integral_promotions (tree);
886 /* These functions must be defined by each front-end which implements
887 a variant of the C language. They are used by port files. */
889 extern tree default_conversion (tree);
891 /* Given two integer or real types, return the type for their sum.
892 Given two compatible ANSI C types, returns the merged type. */
894 extern tree common_type (tree, tree);
896 extern tree decl_constant_value (tree);
898 /* Handle increment and decrement of boolean types. */
899 extern tree boolean_increment (enum tree_code, tree);
901 extern int case_compare (splay_tree_key, splay_tree_key);
903 extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree, tree);
905 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
907 extern tree build_function_call (location_t, tree, tree);
909 extern tree build_function_call_vec (location_t, tree,
910 VEC(tree,gc) *, VEC(tree,gc) *);
912 extern tree resolve_overloaded_builtin (location_t, tree, VEC(tree,gc) *);
914 extern tree finish_label_address_expr (tree, location_t);
916 /* Same function prototype, but the C and C++ front ends have
917 different implementations. Used in c-common.c. */
918 extern tree lookup_label (tree);
919 extern tree lookup_name (tree);
920 extern bool lvalue_p (const_tree);
922 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
923 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
925 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
927 extern void init_c_lex (void);
929 extern void c_cpp_builtins (cpp_reader *);
930 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
931 extern bool c_cpp_error (cpp_reader *, int, int, location_t, unsigned int,
932 const char *, va_list *)
933 ATTRIBUTE_GCC_DIAG(6,0);
935 extern bool parse_optimize_options (tree, bool);
937 /* Positive if an implicit `extern "C"' scope has just been entered;
938 negative if such a scope has just been exited. */
939 extern GTY(()) int pending_lang_change;
941 /* Information recorded about each file examined during compilation. */
945 int time; /* Time spent in the file. */
947 /* Flags used only by C++.
948 INTERFACE_ONLY nonzero means that we are in an "interface" section
949 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust
950 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and
951 INTERFACE_ONLY is zero, it means that we are responsible for
952 exporting definitions that others might need. */
953 short interface_only;
954 short interface_unknown;
957 struct c_fileinfo *get_fileinfo (const char *);
958 extern void dump_time_statistics (void);
960 extern bool c_dump_tree (void *, tree);
962 extern void verify_sequence_points (tree);
964 extern tree fold_offsetof_1 (tree);
965 extern tree fold_offsetof (tree);
967 /* Places where an lvalue, or modifiable lvalue, may be required.
968 Used to select diagnostic messages in lvalue_error and
978 extern void readonly_error (tree, enum lvalue_use);
979 extern void lvalue_error (location_t, enum lvalue_use);
980 extern void invalid_indirection_error (location_t, tree, ref_operator);
982 extern int complete_array_type (tree *, tree, bool);
984 extern tree builtin_type_for_size (int, bool);
986 extern void c_common_mark_addressable_vec (tree);
988 extern void warn_array_subscript_with_type_char (tree);
989 extern void warn_about_parentheses (enum tree_code,
990 enum tree_code, tree,
991 enum tree_code, tree);
992 extern void warn_for_unused_label (tree label);
993 extern void warn_for_div_by_zero (location_t, tree divisor);
994 extern void warn_for_sign_compare (location_t,
995 tree orig_op0, tree orig_op1,
998 enum tree_code resultcode);
999 extern void do_warn_double_promotion (tree, tree, tree, const char *,
1001 extern void set_underlying_type (tree);
1002 extern void record_locally_defined_typedef (tree);
1003 extern void maybe_record_typedef_use (tree);
1004 extern void maybe_warn_unused_local_typedefs (void);
1005 extern VEC(tree,gc) *make_tree_vector (void);
1006 extern void release_tree_vector (VEC(tree,gc) *);
1007 extern VEC(tree,gc) *make_tree_vector_single (tree);
1008 extern VEC(tree,gc) *make_tree_vector_from_list (tree);
1009 extern VEC(tree,gc) *make_tree_vector_copy (const VEC(tree,gc) *);
1011 /* In c-gimplify.c */
1012 extern void c_genericize (tree);
1013 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
1014 extern tree c_build_bind_expr (location_t, tree, tree);
1017 extern void pch_init (void);
1018 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1019 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1021 extern void c_common_write_pch (void);
1022 extern void c_common_no_more_pch (void);
1023 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
1024 extern void c_common_print_pch_checksum (FILE *f);
1026 /* In *-checksum.c */
1027 extern const unsigned char executable_checksum[16];
1029 /* In c-cppbuiltin.c */
1030 extern void builtin_define_std (const char *macro);
1031 extern void builtin_define_with_value (const char *, const char *, int);
1032 extern void c_stddef_cpp_builtins (void);
1033 extern void fe_file_change (const struct line_map *);
1034 extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char);
1036 /* In c-ppoutput.c */
1037 extern void init_pp_output (FILE *);
1038 extern void preprocess_file (cpp_reader *);
1039 extern void pp_file_change (const struct line_map *);
1040 extern void pp_dir_change (cpp_reader *, const char *);
1041 extern bool check_missing_format_attribute (tree, tree);
1044 extern tree c_finish_omp_master (location_t, tree);
1045 extern tree c_finish_omp_critical (location_t, tree, tree);
1046 extern tree c_finish_omp_ordered (location_t, tree);
1047 extern void c_finish_omp_barrier (location_t);
1048 extern tree c_finish_omp_atomic (location_t, enum tree_code, enum tree_code,
1049 tree, tree, tree, tree, tree);
1050 extern void c_finish_omp_flush (location_t);
1051 extern void c_finish_omp_taskwait (location_t);
1052 extern void c_finish_omp_taskyield (location_t);
1053 extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree);
1054 extern void c_split_parallel_clauses (location_t, tree, tree *, tree *);
1055 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1057 /* Not in c-omp.c; provided by the front end. */
1058 extern bool c_omp_sharing_predetermined (tree);
1059 extern tree c_omp_remap_decl (tree, bool);
1060 extern void record_types_used_by_current_var_decl (tree);
1062 /* Return next tree in the chain for chain_next walking of tree nodes. */
1064 c_tree_chain_next (tree t)
1066 /* TREE_CHAIN of a type is TYPE_STUB_DECL, which is different
1067 kind of object, never a long chain of nodes. Prefer
1068 TYPE_NEXT_VARIANT for types. */
1069 if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_TYPE_COMMON))
1070 return TYPE_NEXT_VARIANT (t);
1071 /* Otherwise, if there is TREE_CHAIN, return it. */
1072 if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_COMMON))
1073 return TREE_CHAIN (t);
1077 /* A suffix-identifier value doublet that represents user-defined literals
1079 struct GTY(()) tree_userdef_literal {
1080 struct tree_base base;
1086 #define USERDEF_LITERAL_SUFFIX_ID(NODE) \
1087 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->suffix_id)
1089 #define USERDEF_LITERAL_VALUE(NODE) \
1090 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->value)
1092 #define USERDEF_LITERAL_NUM_STRING(NODE) \
1093 (((struct tree_userdef_literal *)USERDEF_LITERAL_CHECK (NODE))->num_string)
1095 #define USERDEF_LITERAL_TYPE(NODE) \
1096 (TREE_TYPE (USERDEF_LITERAL_VALUE (NODE)))
1098 extern tree build_userdef_literal (tree suffix_id, tree value, tree num_string);
1100 #endif /* ! GCC_C_COMMON_H */