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: 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_LITERAL_TYPE, RID_IS_POD,
139 RID_IS_POLYMORPHIC, RID_IS_STD_LAYOUT,
140 RID_IS_TRIVIAL, RID_IS_UNION,
144 RID_CONSTEXPR, RID_DECLTYPE, RID_NOEXCEPT, RID_NULLPTR, RID_STATIC_ASSERT,
146 /* Objective-C ("AT" reserved words - they are only keywords when
148 RID_AT_ENCODE, RID_AT_END,
149 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS,
150 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC, RID_AT_PACKAGE,
151 RID_AT_PROTOCOL, RID_AT_SELECTOR,
152 RID_AT_THROW, RID_AT_TRY, RID_AT_CATCH,
153 RID_AT_FINALLY, RID_AT_SYNCHRONIZED,
154 RID_AT_OPTIONAL, RID_AT_REQUIRED, RID_AT_PROPERTY,
155 RID_AT_SYNTHESIZE, RID_AT_DYNAMIC,
157 RID_AT_IMPLEMENTATION,
159 /* Named address support, mapping the keyword to a particular named address
160 number. Named address space 0 is reserved for the generic address. If
161 there are more than 254 named addresses, the addr_space_t type will need
162 to be grown from an unsigned char to unsigned short. */
163 RID_ADDR_SPACE_0, /* generic address */
180 RID_FIRST_ADDR_SPACE = RID_ADDR_SPACE_0,
181 RID_LAST_ADDR_SPACE = RID_ADDR_SPACE_15,
185 RID_FIRST_MODIFIER = RID_STATIC,
186 RID_LAST_MODIFIER = RID_ONEWAY,
188 RID_FIRST_CXX0X = RID_CONSTEXPR,
189 RID_LAST_CXX0X = RID_STATIC_ASSERT,
190 RID_FIRST_AT = RID_AT_ENCODE,
191 RID_LAST_AT = RID_AT_IMPLEMENTATION,
192 RID_FIRST_PQ = RID_IN,
193 RID_LAST_PQ = RID_ONEWAY,
194 RID_FIRST_PATTR = RID_GETTER,
195 RID_LAST_PATTR = RID_NONATOMIC
198 #define OBJC_IS_AT_KEYWORD(rid) \
199 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
200 (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
202 #define OBJC_IS_PQ_KEYWORD(rid) \
203 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
204 (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
206 #define OBJC_IS_PATTR_KEYWORD(rid) \
207 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PATTR && \
208 (unsigned int) (rid) <= (unsigned int) RID_LAST_PATTR)
210 /* OBJC_IS_CXX_KEYWORD recognizes the 'CXX_OBJC' keywords (such as
211 'class') which are shared in a subtle way between Objective-C and
212 C++. When the lexer is lexing in Objective-C/Objective-C++, if it
213 finds '@' followed by one of these identifiers (eg, '@class'), it
214 recognizes the whole as an Objective-C keyword. If the identifier
215 is found elsewhere, it follows the rules of the C/C++ language.
217 #define OBJC_IS_CXX_KEYWORD(rid) \
219 || rid == RID_PUBLIC || rid == RID_PROTECTED || rid == RID_PRIVATE \
220 || rid == RID_TRY || rid == RID_THROW || rid == RID_CATCH)
222 /* The elements of `ridpointers' are identifier nodes for the reserved
223 type names and storage classes. It is indexed by a RID_... value. */
224 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
226 /* Standard named or nameless data types of the C compiler. */
233 CTI_UNDERLYING_WCHAR_TYPE,
235 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
236 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
239 CTI_WIDEST_INT_LIT_TYPE,
240 CTI_WIDEST_UINT_LIT_TYPE,
242 /* Types for <stdint.h>, that may not be defined on all
254 CTI_INT_LEAST16_TYPE,
255 CTI_INT_LEAST32_TYPE,
256 CTI_INT_LEAST64_TYPE,
257 CTI_UINT_LEAST8_TYPE,
258 CTI_UINT_LEAST16_TYPE,
259 CTI_UINT_LEAST32_TYPE,
260 CTI_UINT_LEAST64_TYPE,
266 CTI_UINT_FAST16_TYPE,
267 CTI_UINT_FAST32_TYPE,
268 CTI_UINT_FAST64_TYPE,
273 CTI_CHAR16_ARRAY_TYPE,
274 CTI_CHAR32_ARRAY_TYPE,
275 CTI_WCHAR_ARRAY_TYPE,
278 CTI_CONST_STRING_TYPE,
280 /* Type for boolean expressions (bool in C++, int in C). */
283 CTI_TRUTHVALUE_FALSE,
285 CTI_DEFAULT_FUNCTION_TYPE,
287 /* These are not types, but we have to look them up all the time. */
288 CTI_FUNCTION_NAME_DECL,
289 CTI_PRETTY_FUNCTION_NAME_DECL,
290 CTI_C99_FUNCTION_NAME_DECL,
291 CTI_SAVED_FUNCTION_NAME_DECLS,
300 #define C_CPP_HASHNODE(id) \
301 (&(((struct c_common_identifier *) (id))->node))
302 #define C_RID_CODE(id) \
303 ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
304 #define C_SET_RID_CODE(id, code) \
305 (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
307 /* Identifier part common to the C front ends. Inherits from
308 tree_identifier, despite appearances. */
309 struct GTY(()) c_common_identifier {
310 struct tree_common common;
311 struct cpp_hashnode node;
314 /* An entry in the reserved keyword table. */
316 struct c_common_resword
318 const char *const word;
319 ENUM_BITFIELD(rid) const rid : 16;
320 const unsigned int disable : 16;
323 /* Extra cpp_ttype values for C++. */
325 /* A token type for keywords, as opposed to ordinary identifiers. */
326 #define CPP_KEYWORD ((enum cpp_ttype) (N_TTYPES + 1))
328 /* A token type for template-ids. If a template-id is processed while
329 parsing tentatively, it is replaced with a CPP_TEMPLATE_ID token;
330 the value of the CPP_TEMPLATE_ID is whatever was returned by
331 cp_parser_template_id. */
332 #define CPP_TEMPLATE_ID ((enum cpp_ttype) (CPP_KEYWORD + 1))
334 /* A token type for nested-name-specifiers. If a
335 nested-name-specifier is processed while parsing tentatively, it is
336 replaced with a CPP_NESTED_NAME_SPECIFIER token; the value of the
337 CPP_NESTED_NAME_SPECIFIER is whatever was returned by
338 cp_parser_nested_name_specifier_opt. */
339 #define CPP_NESTED_NAME_SPECIFIER ((enum cpp_ttype) (CPP_TEMPLATE_ID + 1))
341 /* A token type for pre-parsed C++0x decltype. */
342 #define CPP_DECLTYPE ((enum cpp_ttype) (CPP_NESTED_NAME_SPECIFIER + 1))
344 /* The number of token types, including C++-specific ones. */
345 #define N_CP_TTYPES ((int) (CPP_DECLTYPE + 1))
347 /* Disable mask. Keywords are disabled if (reswords[i].disable &
348 mask) is _true_. Thus for keywords which are present in all
349 languages the disable field is zero. */
351 #define D_CONLY 0x001 /* C only (not in C++). */
352 #define D_CXXONLY 0x002 /* C++ only (not in C). */
353 #define D_C99 0x004 /* In C, C99 only. */
354 #define D_CXX0X 0x008 /* In C++, C++0X only. */
355 #define D_EXT 0x010 /* GCC extension. */
356 #define D_EXT89 0x020 /* GCC extension incorporated in C99. */
357 #define D_ASM 0x040 /* Disabled by -fno-asm. */
358 #define D_OBJC 0x080 /* In Objective C and neither C nor C++. */
359 #define D_CXX_OBJC 0x100 /* In Objective C, and C++, but not C. */
360 #define D_CXXWARN 0x200 /* In C warn with -Wcxx-compat. */
362 /* The reserved keyword table. */
363 extern const struct c_common_resword c_common_reswords[];
365 /* The number of items in the reserved keyword table. */
366 extern const unsigned int num_c_common_reswords;
368 #define char16_type_node c_global_trees[CTI_CHAR16_TYPE]
369 #define char32_type_node c_global_trees[CTI_CHAR32_TYPE]
370 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
371 #define underlying_wchar_type_node c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
372 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
373 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
374 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
375 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
376 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
377 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
378 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
380 #define sig_atomic_type_node c_global_trees[CTI_SIG_ATOMIC_TYPE]
381 #define int8_type_node c_global_trees[CTI_INT8_TYPE]
382 #define int16_type_node c_global_trees[CTI_INT16_TYPE]
383 #define int32_type_node c_global_trees[CTI_INT32_TYPE]
384 #define int64_type_node c_global_trees[CTI_INT64_TYPE]
385 #define uint8_type_node c_global_trees[CTI_UINT8_TYPE]
386 #define uint16_type_node c_global_trees[CTI_UINT16_TYPE]
387 #define c_uint32_type_node c_global_trees[CTI_UINT32_TYPE]
388 #define c_uint64_type_node c_global_trees[CTI_UINT64_TYPE]
389 #define int_least8_type_node c_global_trees[CTI_INT_LEAST8_TYPE]
390 #define int_least16_type_node c_global_trees[CTI_INT_LEAST16_TYPE]
391 #define int_least32_type_node c_global_trees[CTI_INT_LEAST32_TYPE]
392 #define int_least64_type_node c_global_trees[CTI_INT_LEAST64_TYPE]
393 #define uint_least8_type_node c_global_trees[CTI_UINT_LEAST8_TYPE]
394 #define uint_least16_type_node c_global_trees[CTI_UINT_LEAST16_TYPE]
395 #define uint_least32_type_node c_global_trees[CTI_UINT_LEAST32_TYPE]
396 #define uint_least64_type_node c_global_trees[CTI_UINT_LEAST64_TYPE]
397 #define int_fast8_type_node c_global_trees[CTI_INT_FAST8_TYPE]
398 #define int_fast16_type_node c_global_trees[CTI_INT_FAST16_TYPE]
399 #define int_fast32_type_node c_global_trees[CTI_INT_FAST32_TYPE]
400 #define int_fast64_type_node c_global_trees[CTI_INT_FAST64_TYPE]
401 #define uint_fast8_type_node c_global_trees[CTI_UINT_FAST8_TYPE]
402 #define uint_fast16_type_node c_global_trees[CTI_UINT_FAST16_TYPE]
403 #define uint_fast32_type_node c_global_trees[CTI_UINT_FAST32_TYPE]
404 #define uint_fast64_type_node c_global_trees[CTI_UINT_FAST64_TYPE]
405 #define intptr_type_node c_global_trees[CTI_INTPTR_TYPE]
406 #define uintptr_type_node c_global_trees[CTI_UINTPTR_TYPE]
408 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
409 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
410 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
412 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
413 #define char16_array_type_node c_global_trees[CTI_CHAR16_ARRAY_TYPE]
414 #define char32_array_type_node c_global_trees[CTI_CHAR32_ARRAY_TYPE]
415 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
416 #define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
417 #define string_type_node c_global_trees[CTI_STRING_TYPE]
418 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
420 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
422 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
423 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
424 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
425 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
427 /* A node for `((void) 0)'. */
428 #define void_zero_node c_global_trees[CTI_VOID_ZERO]
430 /* The node for C++ `__null'. */
431 #define null_node c_global_trees[CTI_NULL]
433 extern GTY(()) tree c_global_trees[CTI_MAX];
435 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
436 tree for size reasons. */
437 struct GTY((variable_size)) sorted_fields_type {
439 tree GTY((length ("%h.len"))) elts[1];
442 /* Mark which labels are explicitly declared.
443 These may be shadowed, and may be referenced from nested functions. */
444 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
446 typedef enum c_language_kind
448 clk_c = 0, /* C90, C94 or C99 */
449 clk_objc = 1, /* clk_c with ObjC features. */
450 clk_cxx = 2, /* ANSI/ISO C++ */
451 clk_objcxx = 3 /* clk_cxx with ObjC features. */
455 /* To test for a specific language use c_language, defined by each
456 front end. For "ObjC features" or "not C++" use the macros. */
457 extern c_language_kind c_language;
459 #define c_dialect_cxx() ((c_language & clk_cxx) != 0)
460 #define c_dialect_objc() ((c_language & clk_objc) != 0)
462 /* The various name of operator that appears in error messages. */
463 typedef enum ref_operator {
472 /* implicit conversion */
473 RO_IMPLICIT_CONVERSION
476 /* Information about a statement tree. */
478 struct GTY(()) stmt_tree_s {
479 /* A stack of statement lists being collected. */
480 VEC(tree,gc) *x_cur_stmt_list;
482 /* In C++, Nonzero if we should treat statements as full
483 expressions. In particular, this variable is no-zero if at the
484 end of a statement we should destroy any temporaries created
485 during that statement. Similarly, if, at the end of a block, we
486 should destroy any local variables in this block. Normally, this
487 variable is nonzero, since those are the normal semantics of
490 However, in order to represent aggregate initialization code as
491 tree structure, we use statement-expressions. The statements
492 within the statement expression should not result in cleanups
493 being run until the entire enclosing statement is complete.
495 This flag has no effect in C. */
496 int stmts_are_full_exprs_p;
499 typedef struct stmt_tree_s *stmt_tree;
501 /* Global state pertinent to the current function. Some C dialects
502 extend this structure with additional fields. */
504 struct GTY(()) c_language_function {
505 /* While we are parsing the function, this contains information
506 about the statement-tree that we are building. */
507 struct stmt_tree_s x_stmt_tree;
510 #define stmt_list_stack (current_stmt_tree ()->x_cur_stmt_list)
512 /* When building a statement-tree, this is the current statement list
513 being collected. We define it in this convoluted way, rather than
514 using VEC_last, because it must be an lvalue. */
516 #define cur_stmt_list \
517 (*(VEC_address (tree, stmt_list_stack) \
518 + VEC_length (tree, stmt_list_stack) - 1))
520 #define building_stmt_list_p() (!VEC_empty (tree, stmt_list_stack))
522 /* Language-specific hooks. */
524 /* If non-NULL, this function is called after a precompile header file
526 extern void (*lang_post_pch_load) (void);
528 extern void push_file_scope (void);
529 extern void pop_file_scope (void);
530 extern stmt_tree current_stmt_tree (void);
531 extern tree push_stmt_list (void);
532 extern tree pop_stmt_list (tree);
533 extern tree add_stmt (tree);
534 extern void push_cleanup (tree, tree, bool);
535 extern tree pushdecl_top_level (tree);
536 extern tree pushdecl (tree);
537 extern tree build_modify_expr (location_t, tree, tree, enum tree_code,
538 location_t, tree, tree);
539 extern tree build_indirect_ref (location_t, tree, ref_operator);
541 extern int c_expand_decl (tree);
543 extern int field_decl_cmp (const void *, const void *);
544 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
546 extern bool has_c_linkage (const_tree decl);
548 /* Switches common to the C front ends. */
550 /* Nonzero means don't output line number information. */
552 extern char flag_no_line_commands;
554 /* Nonzero causes -E output not to be done, but directives such as
555 #define that have side effects are still obeyed. */
557 extern char flag_no_output;
559 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
560 'N' or 'U' of the command line switch. */
562 extern char flag_dump_macros;
564 /* Nonzero means pass #include lines through to the output. */
566 extern char flag_dump_includes;
568 /* Nonzero means process PCH files while preprocessing. */
570 extern bool flag_pch_preprocess;
572 /* The file name to which we should write a precompiled header, or
573 NULL if no header will be written in this compile. */
575 extern const char *pch_file;
577 /* Nonzero if an ISO standard was selected. It rejects macros in the
582 /* Warn about #pragma directives that are not recognized. */
584 extern int warn_unknown_pragmas; /* Tri state variable. */
586 /* Warn about format/argument anomalies in calls to formatted I/O functions
587 (*printf, *scanf, strftime, strfmon, etc.). */
589 extern int warn_format;
592 /* C/ObjC language option variables. */
595 /* Nonzero means allow type mismatches in conditional expressions;
596 just make their values `void'. */
598 extern int flag_cond_mismatch;
600 /* Nonzero means enable C89 Amendment 1 features. */
602 extern int flag_isoc94;
604 /* Nonzero means use the ISO C99 (or C1X) dialect of C. */
606 extern int flag_isoc99;
608 /* Nonzero means use the ISO C1X dialect of C. */
610 extern int flag_isoc1x;
612 /* Nonzero means that we have builtin functions, and main is an int. */
614 extern int flag_hosted;
616 /* ObjC language option variables. */
619 /* Tells the compiler that this is a special run. Do not perform any
620 compiling, instead we are to test some platform dependent features
621 and output a C header file with appropriate definitions. */
623 extern int print_struct_values;
625 /* Tells the compiler what is the constant string class for ObjC. */
627 extern const char *constant_string_class_name;
630 /* C++ language option variables. */
633 /* Nonzero means generate separate instantiation control files and
634 juggle them at link time. */
636 extern int flag_use_repository;
638 /* The supported C++ dialects. */
643 /* Experimental features that are likely to become part of
648 /* The C++ dialect being used. C++98 is the default. */
649 extern enum cxx_dialect cxx_dialect;
651 /* Maximum template instantiation depth. This limit is rather
652 arbitrary, but it exists to limit the time it takes to notice
653 excessively recursive template instantiations. */
655 extern int max_tinst_depth;
657 /* Nonzero means that we should not issue warnings about problems that
658 occur when the code is executed, because the code being processed
659 is not expected to be executed. This is set during parsing. This
660 is used for cases like sizeof() and "0 ? a : b". This is a count,
661 not a bool, because unexecuted expressions can nest. */
663 extern int c_inhibit_evaluation_warnings;
665 /* Whether lexing has been completed, so subsequent preprocessor
666 errors should use the compiler's input_location. */
668 extern bool done_lexing;
670 /* C types are partitioned into three subsets: object, function, and
672 #define C_TYPE_OBJECT_P(type) \
673 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
675 #define C_TYPE_INCOMPLETE_P(type) \
676 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
678 #define C_TYPE_FUNCTION_P(type) \
679 (TREE_CODE (type) == FUNCTION_TYPE)
681 /* For convenience we define a single macro to identify the class of
682 object or incomplete types. */
683 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
684 (!C_TYPE_FUNCTION_P (type))
686 struct visibility_flags
688 unsigned inpragma : 1; /* True when in #pragma GCC visibility. */
689 unsigned inlines_hidden : 1; /* True when -finlineshidden in effect. */
692 /* Global visibility options. */
693 extern struct visibility_flags visibility_options;
695 /* Attribute table common to the C front ends. */
696 extern const struct attribute_spec c_common_attribute_table[];
697 extern const struct attribute_spec c_common_format_attribute_table[];
699 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
700 ID is the identifier to use, NAME is the string.
701 TYPE_DEP indicates whether it depends on type of the function or not
702 (i.e. __PRETTY_FUNCTION__). */
704 extern tree (*make_fname_decl) (location_t, tree, int);
706 /* In c-decl.c and cp/tree.c. FIXME. */
707 extern void c_register_addr_space (const char *str, addr_space_t as);
710 extern bool in_late_binary_op;
711 extern const char *c_addr_space_name (addr_space_t as);
712 extern tree identifier_global_value (tree);
713 extern tree c_linkage_bindings (tree);
714 extern void record_builtin_type (enum rid, const char *, tree);
715 extern tree build_void_list_node (void);
716 extern void start_fname_decls (void);
717 extern void finish_fname_decls (void);
718 extern const char *fname_as_string (int);
719 extern tree fname_decl (location_t, unsigned, tree);
721 extern void check_function_arguments (const_tree, int, tree *);
722 extern void check_function_arguments_recurse (void (*)
724 unsigned HOST_WIDE_INT),
726 unsigned HOST_WIDE_INT);
727 extern bool check_builtin_function_arguments (tree, int, tree *);
728 extern void check_function_format (tree, int, tree *);
729 extern void set_Wformat (int);
730 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
731 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
732 extern bool attribute_takes_identifier_p (const_tree);
733 extern bool c_common_handle_option (size_t, const char *, int, int, location_t,
734 const struct cl_option_handlers *);
735 extern bool default_handle_c_option (size_t, const char *, int);
736 extern tree c_common_type_for_mode (enum machine_mode, int);
737 extern tree c_common_type_for_size (unsigned int, int);
738 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
740 extern tree c_common_unsigned_type (tree);
741 extern tree c_common_signed_type (tree);
742 extern tree c_common_signed_or_unsigned_type (int, tree);
743 extern void c_common_init_ts (void);
744 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
745 extern bool unsafe_conversion_p (tree, tree, bool);
746 extern bool decl_with_nonnull_addr_p (const_tree);
747 extern tree c_fully_fold (tree, bool, bool *);
748 extern tree decl_constant_value_for_optimization (tree);
749 extern tree c_wrap_maybe_const (tree, bool);
750 extern tree c_save_expr (tree);
751 extern tree c_common_truthvalue_conversion (location_t, tree);
752 extern void c_apply_type_quals_to_decl (int, tree);
753 extern tree c_sizeof_or_alignof_type (location_t, tree, bool, int);
754 extern tree c_alignof_expr (location_t, tree);
755 /* Print an error message for invalid operands to arith operation CODE.
756 NOP_EXPR is used as a special case (see truthvalue_conversion). */
757 extern void binary_op_error (location_t, enum tree_code, tree, tree);
758 extern tree fix_string_type (tree);
759 extern void constant_expression_warning (tree);
760 extern void constant_expression_error (tree);
761 extern bool strict_aliasing_warning (tree, tree, tree);
762 extern void warnings_for_convert_and_check (tree, tree, tree);
763 extern tree convert_and_check (tree, tree);
764 extern void overflow_warning (location_t, tree);
765 extern void warn_logical_operator (location_t, enum tree_code, tree,
766 enum tree_code, tree, enum tree_code, tree);
767 extern void check_main_parameter_types (tree decl);
768 extern bool c_determine_visibility (tree);
769 extern bool same_scalar_type_ignoring_signedness (tree, tree);
770 extern void mark_valid_location_for_stdc_pragma (bool);
771 extern bool valid_location_for_stdc_pragma_p (void);
772 extern void set_float_const_decimal64 (void);
773 extern void clear_float_const_decimal64 (void);
774 extern bool float_const_decimal64_p (void);
776 extern bool keyword_begins_type_specifier (enum rid);
777 extern bool keyword_is_storage_class_specifier (enum rid);
778 extern bool keyword_is_type_qualifier (enum rid);
779 extern bool keyword_is_decl_specifier (enum rid);
781 #define c_sizeof(LOC, T) c_sizeof_or_alignof_type (LOC, T, true, 1)
782 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, 1)
784 /* Subroutine of build_binary_op, used for certain operations. */
785 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
787 /* Subroutine of build_binary_op, used for comparison operations.
788 See if the operands have both been converted from subword integer types
789 and, if so, perhaps change them both back to their original type. */
790 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
792 extern tree pointer_int_sum (location_t, enum tree_code, tree, tree);
794 /* Add qualifiers to a type, in the fashion for C. */
795 extern tree c_build_qualified_type (tree, int);
797 /* Build tree nodes and builtin functions common to both C and C++ language
799 extern void c_common_nodes_and_builtins (void);
801 extern void disable_builtin_function (const char *);
803 extern void set_compound_literal_name (tree decl);
805 extern tree build_va_arg (location_t, tree, tree);
807 extern const unsigned int c_family_lang_mask;
808 extern unsigned int c_common_option_lang_mask (void);
809 extern void c_common_initialize_diagnostics (diagnostic_context *);
810 extern bool c_common_complain_wrong_lang_p (const struct cl_option *);
811 extern void c_common_init_options_struct (struct gcc_options *);
812 extern void c_common_init_options (unsigned int, struct cl_decoded_option *);
813 extern bool c_common_post_options (const char **);
814 extern bool c_common_init (void);
815 extern void c_common_finish (void);
816 extern void c_common_parse_file (void);
817 extern alias_set_type c_common_get_alias_set (tree);
818 extern void c_register_builtin_type (tree, const char*);
819 extern bool c_promoting_integer_type_p (const_tree);
820 extern int self_promoting_args_p (const_tree);
821 extern tree strip_pointer_operator (tree);
822 extern tree strip_pointer_or_array_types (tree);
823 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
825 /* This is the basic parsing function. */
826 extern void c_parse_file (void);
828 extern void warn_for_omitted_condop (location_t, tree);
830 /* These macros provide convenient access to the various _STMT nodes. */
832 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
833 if a statement expression. */
834 #define STATEMENT_LIST_STMT_EXPR(NODE) \
835 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
837 /* Nonzero if a label has been added to the statement list. */
838 #define STATEMENT_LIST_HAS_LABEL(NODE) \
839 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
841 /* C_MAYBE_CONST_EXPR accessors. */
842 #define C_MAYBE_CONST_EXPR_PRE(NODE) \
843 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
844 #define C_MAYBE_CONST_EXPR_EXPR(NODE) \
845 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
846 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE) \
847 TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
848 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE) \
849 TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
850 #define EXPR_INT_CONST_OPERANDS(EXPR) \
851 (INTEGRAL_TYPE_P (TREE_TYPE (EXPR)) \
852 && (TREE_CODE (EXPR) == INTEGER_CST \
853 || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR \
854 && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
856 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
857 #define DECL_C_BIT_FIELD(NODE) \
858 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
859 #define SET_DECL_C_BIT_FIELD(NODE) \
860 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
861 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
862 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
864 extern tree do_case (location_t, tree, tree);
865 extern tree build_stmt (location_t, enum tree_code, ...);
866 extern tree build_real_imag_expr (location_t, enum tree_code, tree);
868 /* These functions must be defined by each front-end which implements
869 a variant of the C language. They are used in c-common.c. */
871 extern tree build_unary_op (location_t, enum tree_code, tree, int);
872 extern tree build_binary_op (location_t, enum tree_code, tree, tree, int);
873 extern tree perform_integral_promotions (tree);
875 /* These functions must be defined by each front-end which implements
876 a variant of the C language. They are used by port files. */
878 extern tree default_conversion (tree);
880 /* Given two integer or real types, return the type for their sum.
881 Given two compatible ANSI C types, returns the merged type. */
883 extern tree common_type (tree, tree);
885 extern tree decl_constant_value (tree);
887 /* Handle increment and decrement of boolean types. */
888 extern tree boolean_increment (enum tree_code, tree);
890 extern int case_compare (splay_tree_key, splay_tree_key);
892 extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree, tree);
894 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
896 extern tree build_function_call (location_t, tree, tree);
898 extern tree build_function_call_vec (location_t, tree,
899 VEC(tree,gc) *, VEC(tree,gc) *);
901 extern tree resolve_overloaded_builtin (location_t, tree, VEC(tree,gc) *);
903 extern tree finish_label_address_expr (tree, location_t);
905 /* Same function prototype, but the C and C++ front ends have
906 different implementations. Used in c-common.c. */
907 extern tree lookup_label (tree);
908 extern tree lookup_name (tree);
909 extern bool lvalue_p (const_tree);
911 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
912 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
914 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
916 extern void init_c_lex (void);
918 extern void c_cpp_builtins (cpp_reader *);
919 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
920 extern bool c_cpp_error (cpp_reader *, int, int, location_t, unsigned int,
921 const char *, va_list *)
922 ATTRIBUTE_GCC_DIAG(6,0);
924 extern bool parse_optimize_options (tree, bool);
926 /* Positive if an implicit `extern "C"' scope has just been entered;
927 negative if such a scope has just been exited. */
928 extern GTY(()) int pending_lang_change;
930 /* Information recorded about each file examined during compilation. */
934 int time; /* Time spent in the file. */
936 /* Flags used only by C++.
937 INTERFACE_ONLY nonzero means that we are in an "interface" section
938 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust
939 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and
940 INTERFACE_ONLY is zero, it means that we are responsible for
941 exporting definitions that others might need. */
942 short interface_only;
943 short interface_unknown;
946 struct c_fileinfo *get_fileinfo (const char *);
947 extern void dump_time_statistics (void);
949 extern bool c_dump_tree (void *, tree);
951 extern void verify_sequence_points (tree);
953 extern tree fold_offsetof (tree, tree);
955 /* Places where an lvalue, or modifiable lvalue, may be required.
956 Used to select diagnostic messages in lvalue_error and
966 extern void readonly_error (tree, enum lvalue_use);
967 extern void lvalue_error (location_t, enum lvalue_use);
968 extern void invalid_indirection_error (location_t, tree, ref_operator);
970 extern int complete_array_type (tree *, tree, bool);
972 extern tree builtin_type_for_size (int, bool);
974 extern void c_common_mark_addressable_vec (tree);
976 extern void warn_array_subscript_with_type_char (tree);
977 extern void warn_about_parentheses (enum tree_code,
978 enum tree_code, tree,
979 enum tree_code, tree);
980 extern void warn_for_unused_label (tree label);
981 extern void warn_for_div_by_zero (location_t, tree divisor);
982 extern void warn_for_sign_compare (location_t,
983 tree orig_op0, tree orig_op1,
986 enum tree_code resultcode);
987 extern void do_warn_double_promotion (tree, tree, tree, const char *,
989 extern void set_underlying_type (tree);
990 extern VEC(tree,gc) *make_tree_vector (void);
991 extern void release_tree_vector (VEC(tree,gc) *);
992 extern VEC(tree,gc) *make_tree_vector_single (tree);
993 extern VEC(tree,gc) *make_tree_vector_from_list (tree);
994 extern VEC(tree,gc) *make_tree_vector_copy (const VEC(tree,gc) *);
996 /* In c-gimplify.c */
997 extern void c_genericize (tree);
998 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
999 extern tree c_build_bind_expr (location_t, tree, tree);
1002 extern void pch_init (void);
1003 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1004 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1006 extern void c_common_write_pch (void);
1007 extern void c_common_no_more_pch (void);
1008 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
1009 extern void c_common_print_pch_checksum (FILE *f);
1011 /* In *-checksum.c */
1012 extern const unsigned char executable_checksum[16];
1014 /* In c-cppbuiltin.c */
1015 extern void builtin_define_std (const char *macro);
1016 extern void builtin_define_with_value (const char *, const char *, int);
1017 extern void c_stddef_cpp_builtins (void);
1018 extern void fe_file_change (const struct line_map *);
1019 extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char);
1021 /* In c-ppoutput.c */
1022 extern void init_pp_output (FILE *);
1023 extern void preprocess_file (cpp_reader *);
1024 extern void pp_file_change (const struct line_map *);
1025 extern void pp_dir_change (cpp_reader *, const char *);
1026 extern bool check_missing_format_attribute (tree, tree);
1029 extern tree c_finish_omp_master (location_t, tree);
1030 extern tree c_finish_omp_critical (location_t, tree, tree);
1031 extern tree c_finish_omp_ordered (location_t, tree);
1032 extern void c_finish_omp_barrier (location_t);
1033 extern tree c_finish_omp_atomic (location_t, enum tree_code, enum tree_code,
1034 tree, tree, tree, tree, tree);
1035 extern void c_finish_omp_flush (location_t);
1036 extern void c_finish_omp_taskwait (location_t);
1037 extern void c_finish_omp_taskyield (location_t);
1038 extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree);
1039 extern void c_split_parallel_clauses (location_t, tree, tree *, tree *);
1040 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1042 /* Not in c-omp.c; provided by the front end. */
1043 extern bool c_omp_sharing_predetermined (tree);
1044 extern tree c_omp_remap_decl (tree, bool);
1045 extern void record_types_used_by_current_var_decl (tree);
1047 /* Return next tree in the chain for chain_next walking of tree nodes. */
1049 c_tree_chain_next (tree t)
1051 /* TREE_CHAIN of a type is TYPE_STUB_DECL, which is different
1052 kind of object, never a long chain of nodes. Prefer
1053 TYPE_NEXT_VARIANT for types. */
1054 if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_TYPE_COMMON))
1055 return TYPE_NEXT_VARIANT (t);
1056 /* Otherwise, if there is TREE_CHAIN, return it. */
1057 if (CODE_CONTAINS_STRUCT (TREE_CODE (t), TS_COMMON))
1058 return TREE_CHAIN (t);
1062 #endif /* ! GCC_C_COMMON_H */