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 /* C (reserved and imaginary types not implemented, so any use is a
88 RID_INT, RID_CHAR, RID_FLOAT, RID_DOUBLE, RID_VOID,
90 RID_ENUM, RID_STRUCT, RID_UNION, RID_IF, RID_ELSE,
91 RID_WHILE, RID_DO, RID_FOR, RID_SWITCH, RID_CASE,
92 RID_DEFAULT, RID_BREAK, RID_CONTINUE, RID_RETURN, RID_GOTO,
96 RID_ASM, RID_TYPEOF, RID_ALIGNOF, RID_ATTRIBUTE, RID_VA_ARG,
97 RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL, RID_CHOOSE_EXPR,
98 RID_TYPES_COMPATIBLE_P,
99 RID_DFLOAT32, RID_DFLOAT64, RID_DFLOAT128,
100 RID_FRACT, RID_ACCUM,
102 /* This means to warn that this is a C++ keyword, and then treat it
103 as a normal identifier. */
106 /* Too many ways of getting the name of a function as a string */
107 RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
109 /* C++ (some of these are keywords in Objective-C as well, but only
110 if they appear after a '@') */
111 RID_BOOL, RID_WCHAR, RID_CLASS,
112 RID_PUBLIC, RID_PRIVATE, RID_PROTECTED,
113 RID_TEMPLATE, RID_NULL, RID_CATCH,
114 RID_DELETE, RID_FALSE, RID_NAMESPACE,
115 RID_NEW, RID_OFFSETOF, RID_OPERATOR,
116 RID_THIS, RID_THROW, RID_TRUE,
117 RID_TRY, RID_TYPENAME, RID_TYPEID,
118 RID_USING, RID_CHAR16, RID_CHAR32,
121 RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
124 RID_HAS_NOTHROW_ASSIGN, RID_HAS_NOTHROW_CONSTRUCTOR,
125 RID_HAS_NOTHROW_COPY, RID_HAS_TRIVIAL_ASSIGN,
126 RID_HAS_TRIVIAL_CONSTRUCTOR, RID_HAS_TRIVIAL_COPY,
127 RID_HAS_TRIVIAL_DESTRUCTOR, RID_HAS_VIRTUAL_DESTRUCTOR,
128 RID_IS_ABSTRACT, RID_IS_BASE_OF,
129 RID_IS_CONVERTIBLE_TO, RID_IS_CLASS,
130 RID_IS_EMPTY, RID_IS_ENUM,
131 RID_IS_POD, RID_IS_POLYMORPHIC,
132 RID_IS_STD_LAYOUT, RID_IS_TRIVIAL,
136 RID_CONSTEXPR, RID_DECLTYPE, RID_NOEXCEPT, RID_NULLPTR, RID_STATIC_ASSERT,
138 /* Objective-C ("AT" reserved words - they are only keywords when
140 RID_AT_ENCODE, RID_AT_END,
141 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS,
142 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC,
143 RID_AT_PROTOCOL, RID_AT_SELECTOR,
144 RID_AT_THROW, RID_AT_TRY, RID_AT_CATCH,
145 RID_AT_FINALLY, RID_AT_SYNCHRONIZED,
147 RID_AT_IMPLEMENTATION,
149 /* Named address support, mapping the keyword to a particular named address
150 number. Named address space 0 is reserved for the generic address. If
151 there are more than 254 named addresses, the addr_space_t type will need
152 to be grown from an unsigned char to unsigned short. */
153 RID_ADDR_SPACE_0, /* generic address */
170 RID_FIRST_ADDR_SPACE = RID_ADDR_SPACE_0,
171 RID_LAST_ADDR_SPACE = RID_ADDR_SPACE_15,
175 RID_FIRST_MODIFIER = RID_STATIC,
176 RID_LAST_MODIFIER = RID_ONEWAY,
178 RID_FIRST_CXX0X = RID_CONSTEXPR,
179 RID_LAST_CXX0X = RID_STATIC_ASSERT,
180 RID_FIRST_AT = RID_AT_ENCODE,
181 RID_LAST_AT = RID_AT_IMPLEMENTATION,
182 RID_FIRST_PQ = RID_IN,
183 RID_LAST_PQ = RID_ONEWAY
186 #define OBJC_IS_AT_KEYWORD(rid) \
187 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
188 (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
190 #define OBJC_IS_PQ_KEYWORD(rid) \
191 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
192 (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
194 /* OBJC_IS_CXX_KEYWORD recognizes the 'CXX_OBJC' keywords (such as
195 'class') which are shared in a subtle way between Objective-C and
196 C++. When the lexer is lexing in Objective-C/Objective-C++, if it
197 finds '@' followed by one of these identifiers (eg, '@class'), it
198 recognizes the whole as an Objective-C keyword. If the identifier
199 is found elsewhere, it follows the rules of the C/C++ language.
201 #define OBJC_IS_CXX_KEYWORD(rid) \
203 || rid == RID_PUBLIC || rid == RID_PROTECTED || rid == RID_PRIVATE \
204 || rid == RID_TRY || rid == RID_THROW || rid == RID_CATCH)
206 /* The elements of `ridpointers' are identifier nodes for the reserved
207 type names and storage classes. It is indexed by a RID_... value. */
208 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
210 /* Standard named or nameless data types of the C compiler. */
217 CTI_UNDERLYING_WCHAR_TYPE,
219 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
220 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
223 CTI_WIDEST_INT_LIT_TYPE,
224 CTI_WIDEST_UINT_LIT_TYPE,
226 /* Types for <stdint.h>, that may not be defined on all
238 CTI_INT_LEAST16_TYPE,
239 CTI_INT_LEAST32_TYPE,
240 CTI_INT_LEAST64_TYPE,
241 CTI_UINT_LEAST8_TYPE,
242 CTI_UINT_LEAST16_TYPE,
243 CTI_UINT_LEAST32_TYPE,
244 CTI_UINT_LEAST64_TYPE,
250 CTI_UINT_FAST16_TYPE,
251 CTI_UINT_FAST32_TYPE,
252 CTI_UINT_FAST64_TYPE,
257 CTI_CHAR16_ARRAY_TYPE,
258 CTI_CHAR32_ARRAY_TYPE,
259 CTI_WCHAR_ARRAY_TYPE,
262 CTI_CONST_STRING_TYPE,
264 /* Type for boolean expressions (bool in C++, int in C). */
267 CTI_TRUTHVALUE_FALSE,
269 CTI_DEFAULT_FUNCTION_TYPE,
271 /* These are not types, but we have to look them up all the time. */
272 CTI_FUNCTION_NAME_DECL,
273 CTI_PRETTY_FUNCTION_NAME_DECL,
274 CTI_C99_FUNCTION_NAME_DECL,
275 CTI_SAVED_FUNCTION_NAME_DECLS,
284 #define C_CPP_HASHNODE(id) \
285 (&(((struct c_common_identifier *) (id))->node))
286 #define C_RID_CODE(id) \
287 ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
288 #define C_SET_RID_CODE(id, code) \
289 (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
291 /* Identifier part common to the C front ends. Inherits from
292 tree_identifier, despite appearances. */
293 struct GTY(()) c_common_identifier {
294 struct tree_common common;
295 struct cpp_hashnode node;
298 /* An entry in the reserved keyword table. */
300 struct c_common_resword
302 const char *const word;
303 ENUM_BITFIELD(rid) const rid : 16;
304 const unsigned int disable : 16;
307 /* Disable mask. Keywords are disabled if (reswords[i].disable &
308 mask) is _true_. Thus for keywords which are present in all
309 languages the disable field is zero. */
311 #define D_CONLY 0x001 /* C only (not in C++). */
312 #define D_CXXONLY 0x002 /* C++ only (not in C). */
313 #define D_C99 0x004 /* In C, C99 only. */
314 #define D_CXX0X 0x008 /* In C++, C++0X only. */
315 #define D_EXT 0x010 /* GCC extension. */
316 #define D_EXT89 0x020 /* GCC extension incorporated in C99. */
317 #define D_ASM 0x040 /* Disabled by -fno-asm. */
318 #define D_OBJC 0x080 /* In Objective C and neither C nor C++. */
319 #define D_CXX_OBJC 0x100 /* In Objective C, and C++, but not C. */
320 #define D_CXXWARN 0x200 /* In C warn with -Wcxx-compat. */
322 /* The reserved keyword table. */
323 extern const struct c_common_resword c_common_reswords[];
325 /* The number of items in the reserved keyword table. */
326 extern const unsigned int num_c_common_reswords;
328 #define char16_type_node c_global_trees[CTI_CHAR16_TYPE]
329 #define char32_type_node c_global_trees[CTI_CHAR32_TYPE]
330 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
331 #define underlying_wchar_type_node c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
332 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
333 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
334 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
335 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
336 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
337 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
338 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
340 #define sig_atomic_type_node c_global_trees[CTI_SIG_ATOMIC_TYPE]
341 #define int8_type_node c_global_trees[CTI_INT8_TYPE]
342 #define int16_type_node c_global_trees[CTI_INT16_TYPE]
343 #define int32_type_node c_global_trees[CTI_INT32_TYPE]
344 #define int64_type_node c_global_trees[CTI_INT64_TYPE]
345 #define uint8_type_node c_global_trees[CTI_UINT8_TYPE]
346 #define uint16_type_node c_global_trees[CTI_UINT16_TYPE]
347 #define c_uint32_type_node c_global_trees[CTI_UINT32_TYPE]
348 #define c_uint64_type_node c_global_trees[CTI_UINT64_TYPE]
349 #define int_least8_type_node c_global_trees[CTI_INT_LEAST8_TYPE]
350 #define int_least16_type_node c_global_trees[CTI_INT_LEAST16_TYPE]
351 #define int_least32_type_node c_global_trees[CTI_INT_LEAST32_TYPE]
352 #define int_least64_type_node c_global_trees[CTI_INT_LEAST64_TYPE]
353 #define uint_least8_type_node c_global_trees[CTI_UINT_LEAST8_TYPE]
354 #define uint_least16_type_node c_global_trees[CTI_UINT_LEAST16_TYPE]
355 #define uint_least32_type_node c_global_trees[CTI_UINT_LEAST32_TYPE]
356 #define uint_least64_type_node c_global_trees[CTI_UINT_LEAST64_TYPE]
357 #define int_fast8_type_node c_global_trees[CTI_INT_FAST8_TYPE]
358 #define int_fast16_type_node c_global_trees[CTI_INT_FAST16_TYPE]
359 #define int_fast32_type_node c_global_trees[CTI_INT_FAST32_TYPE]
360 #define int_fast64_type_node c_global_trees[CTI_INT_FAST64_TYPE]
361 #define uint_fast8_type_node c_global_trees[CTI_UINT_FAST8_TYPE]
362 #define uint_fast16_type_node c_global_trees[CTI_UINT_FAST16_TYPE]
363 #define uint_fast32_type_node c_global_trees[CTI_UINT_FAST32_TYPE]
364 #define uint_fast64_type_node c_global_trees[CTI_UINT_FAST64_TYPE]
365 #define intptr_type_node c_global_trees[CTI_INTPTR_TYPE]
366 #define uintptr_type_node c_global_trees[CTI_UINTPTR_TYPE]
368 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
369 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
370 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
372 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
373 #define char16_array_type_node c_global_trees[CTI_CHAR16_ARRAY_TYPE]
374 #define char32_array_type_node c_global_trees[CTI_CHAR32_ARRAY_TYPE]
375 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
376 #define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
377 #define string_type_node c_global_trees[CTI_STRING_TYPE]
378 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
380 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
382 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
383 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
384 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
385 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
387 /* A node for `((void) 0)'. */
388 #define void_zero_node c_global_trees[CTI_VOID_ZERO]
390 /* The node for C++ `__null'. */
391 #define null_node c_global_trees[CTI_NULL]
393 extern GTY(()) tree c_global_trees[CTI_MAX];
395 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
396 tree for size reasons. */
397 struct GTY((variable_size)) sorted_fields_type {
399 tree GTY((length ("%h.len"))) elts[1];
402 /* Mark which labels are explicitly declared.
403 These may be shadowed, and may be referenced from nested functions. */
404 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
406 typedef enum c_language_kind
408 clk_c = 0, /* C90, C94 or C99 */
409 clk_objc = 1, /* clk_c with ObjC features. */
410 clk_cxx = 2, /* ANSI/ISO C++ */
411 clk_objcxx = 3 /* clk_cxx with ObjC features. */
415 /* To test for a specific language use c_language, defined by each
416 front end. For "ObjC features" or "not C++" use the macros. */
417 extern c_language_kind c_language;
419 #define c_dialect_cxx() ((c_language & clk_cxx) != 0)
420 #define c_dialect_objc() ((c_language & clk_objc) != 0)
422 /* The various name of operator that appears in error messages. */
423 typedef enum ref_operator {
432 /* implicit conversion */
433 RO_IMPLICIT_CONVERSION
436 /* Information about a statement tree. */
438 struct GTY(()) stmt_tree_s {
439 /* The current statement list being collected. */
440 tree x_cur_stmt_list;
442 /* In C++, Nonzero if we should treat statements as full
443 expressions. In particular, this variable is no-zero if at the
444 end of a statement we should destroy any temporaries created
445 during that statement. Similarly, if, at the end of a block, we
446 should destroy any local variables in this block. Normally, this
447 variable is nonzero, since those are the normal semantics of
450 However, in order to represent aggregate initialization code as
451 tree structure, we use statement-expressions. The statements
452 within the statement expression should not result in cleanups
453 being run until the entire enclosing statement is complete.
455 This flag has no effect in C. */
456 int stmts_are_full_exprs_p;
459 typedef struct stmt_tree_s *stmt_tree;
461 /* Global state pertinent to the current function. Some C dialects
462 extend this structure with additional fields. */
464 struct GTY(()) c_language_function {
465 /* While we are parsing the function, this contains information
466 about the statement-tree that we are building. */
467 struct stmt_tree_s x_stmt_tree;
470 /* When building a statement-tree, this is the current statement list
471 being collected. It's TREE_CHAIN is a back-pointer to the previous
474 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
476 /* Language-specific hooks. */
478 /* If non-NULL, this function is called after a precompile header file
480 extern void (*lang_post_pch_load) (void);
482 extern void push_file_scope (void);
483 extern void pop_file_scope (void);
484 extern stmt_tree current_stmt_tree (void);
485 extern tree push_stmt_list (void);
486 extern tree pop_stmt_list (tree);
487 extern tree add_stmt (tree);
488 extern void push_cleanup (tree, tree, bool);
489 extern tree pushdecl_top_level (tree);
490 extern tree pushdecl (tree);
491 extern tree build_modify_expr (location_t, tree, tree, enum tree_code,
492 location_t, tree, tree);
493 extern tree build_indirect_ref (location_t, tree, ref_operator);
495 extern int c_expand_decl (tree);
497 extern int field_decl_cmp (const void *, const void *);
498 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
500 extern bool has_c_linkage (const_tree decl);
502 /* Switches common to the C front ends. */
504 /* Nonzero means don't output line number information. */
506 extern char flag_no_line_commands;
508 /* Nonzero causes -E output not to be done, but directives such as
509 #define that have side effects are still obeyed. */
511 extern char flag_no_output;
513 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
514 'N' or 'U' of the command line switch. */
516 extern char flag_dump_macros;
518 /* Nonzero means pass #include lines through to the output. */
520 extern char flag_dump_includes;
522 /* Nonzero means process PCH files while preprocessing. */
524 extern bool flag_pch_preprocess;
526 /* The file name to which we should write a precompiled header, or
527 NULL if no header will be written in this compile. */
529 extern const char *pch_file;
531 /* Nonzero if an ISO standard was selected. It rejects macros in the
536 /* Warn about #pragma directives that are not recognized. */
538 extern int warn_unknown_pragmas; /* Tri state variable. */
540 /* Warn about format/argument anomalies in calls to formatted I/O functions
541 (*printf, *scanf, strftime, strfmon, etc.). */
543 extern int warn_format;
546 /* C/ObjC language option variables. */
549 /* Nonzero means allow type mismatches in conditional expressions;
550 just make their values `void'. */
552 extern int flag_cond_mismatch;
554 /* Nonzero means enable C89 Amendment 1 features. */
556 extern int flag_isoc94;
558 /* Nonzero means use the ISO C99 (or C1X) dialect of C. */
560 extern int flag_isoc99;
562 /* Nonzero means use the ISO C1X dialect of C. */
564 extern int flag_isoc1x;
566 /* Nonzero means that we have builtin functions, and main is an int. */
568 extern int flag_hosted;
570 /* ObjC language option variables. */
573 /* Tells the compiler that this is a special run. Do not perform any
574 compiling, instead we are to test some platform dependent features
575 and output a C header file with appropriate definitions. */
577 extern int print_struct_values;
579 /* Tells the compiler what is the constant string class for ObjC. */
581 extern const char *constant_string_class_name;
584 /* C++ language option variables. */
587 /* Nonzero means generate separate instantiation control files and
588 juggle them at link time. */
590 extern int flag_use_repository;
592 /* The supported C++ dialects. */
597 /* Experimental features that are likely to become part of
602 /* The C++ dialect being used. C++98 is the default. */
603 extern enum cxx_dialect cxx_dialect;
605 /* Maximum template instantiation depth. This limit is rather
606 arbitrary, but it exists to limit the time it takes to notice
607 infinite template instantiations. */
609 extern int max_tinst_depth;
611 /* Nonzero means that we should not issue warnings about problems that
612 occur when the code is executed, because the code being processed
613 is not expected to be executed. This is set during parsing. This
614 is used for cases like sizeof() and "0 ? a : b". This is a count,
615 not a bool, because unexecuted expressions can nest. */
617 extern int c_inhibit_evaluation_warnings;
619 /* Whether lexing has been completed, so subsequent preprocessor
620 errors should use the compiler's input_location. */
622 extern bool done_lexing;
624 /* C types are partitioned into three subsets: object, function, and
626 #define C_TYPE_OBJECT_P(type) \
627 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
629 #define C_TYPE_INCOMPLETE_P(type) \
630 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
632 #define C_TYPE_FUNCTION_P(type) \
633 (TREE_CODE (type) == FUNCTION_TYPE)
635 /* For convenience we define a single macro to identify the class of
636 object or incomplete types. */
637 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
638 (!C_TYPE_FUNCTION_P (type))
640 /* Attribute table common to the C front ends. */
641 extern const struct attribute_spec c_common_attribute_table[];
642 extern const struct attribute_spec c_common_format_attribute_table[];
644 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
645 ID is the identifier to use, NAME is the string.
646 TYPE_DEP indicates whether it depends on type of the function or not
647 (i.e. __PRETTY_FUNCTION__). */
649 extern tree (*make_fname_decl) (location_t, tree, int);
651 /* In c-decl.c and cp/tree.c. FIXME. */
652 extern void c_register_addr_space (const char *str, addr_space_t as);
655 extern const char *c_addr_space_name (addr_space_t as);
656 extern tree identifier_global_value (tree);
657 extern void record_builtin_type (enum rid, const char *, tree);
658 extern tree build_void_list_node (void);
659 extern void start_fname_decls (void);
660 extern void finish_fname_decls (void);
661 extern const char *fname_as_string (int);
662 extern tree fname_decl (location_t, unsigned, tree);
664 extern void check_function_arguments (tree, int, tree *, tree);
665 extern void check_function_arguments_recurse (void (*)
667 unsigned HOST_WIDE_INT),
669 unsigned HOST_WIDE_INT);
670 extern bool check_builtin_function_arguments (tree, int, tree *);
671 extern void check_function_format (tree, int, tree *);
672 extern void set_Wformat (int);
673 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
674 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
675 extern bool attribute_takes_identifier_p (const_tree);
676 extern bool c_common_handle_option (size_t, const char *, int, int,
677 const struct cl_option_handlers *);
678 extern tree c_common_type_for_mode (enum machine_mode, int);
679 extern tree c_common_type_for_size (unsigned int, int);
680 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
682 extern tree c_common_unsigned_type (tree);
683 extern tree c_common_signed_type (tree);
684 extern tree c_common_signed_or_unsigned_type (int, tree);
685 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
686 extern bool decl_with_nonnull_addr_p (const_tree);
687 extern tree c_fully_fold (tree, bool, bool *);
688 extern tree decl_constant_value_for_optimization (tree);
689 extern tree c_wrap_maybe_const (tree, bool);
690 extern tree c_save_expr (tree);
691 extern tree c_common_truthvalue_conversion (location_t, tree);
692 extern void c_apply_type_quals_to_decl (int, tree);
693 extern tree c_sizeof_or_alignof_type (location_t, tree, bool, int);
694 extern tree c_alignof_expr (location_t, tree);
695 /* Print an error message for invalid operands to arith operation CODE.
696 NOP_EXPR is used as a special case (see truthvalue_conversion). */
697 extern void binary_op_error (location_t, enum tree_code, tree, tree);
698 extern tree fix_string_type (tree);
699 extern void constant_expression_warning (tree);
700 extern void constant_expression_error (tree);
701 extern bool strict_aliasing_warning (tree, tree, tree);
702 extern void warnings_for_convert_and_check (tree, tree, tree);
703 extern tree convert_and_check (tree, tree);
704 extern void overflow_warning (location_t, tree);
705 extern void warn_logical_operator (location_t, enum tree_code, tree,
706 enum tree_code, tree, enum tree_code, tree);
707 extern void check_main_parameter_types (tree decl);
708 extern bool c_determine_visibility (tree);
709 extern bool same_scalar_type_ignoring_signedness (tree, tree);
710 extern void mark_valid_location_for_stdc_pragma (bool);
711 extern bool valid_location_for_stdc_pragma_p (void);
712 extern void set_float_const_decimal64 (void);
713 extern void clear_float_const_decimal64 (void);
714 extern bool float_const_decimal64_p (void);
716 #define c_sizeof(LOC, T) c_sizeof_or_alignof_type (LOC, T, true, 1)
717 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, 1)
719 /* Subroutine of build_binary_op, used for certain operations. */
720 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
722 /* Subroutine of build_binary_op, used for comparison operations.
723 See if the operands have both been converted from subword integer types
724 and, if so, perhaps change them both back to their original type. */
725 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
727 extern tree pointer_int_sum (location_t, enum tree_code, tree, tree);
729 /* Add qualifiers to a type, in the fashion for C. */
730 extern tree c_build_qualified_type (tree, int);
732 /* Build tree nodes and builtin functions common to both C and C++ language
734 extern void c_common_nodes_and_builtins (void);
736 extern void disable_builtin_function (const char *);
738 extern void set_compound_literal_name (tree decl);
740 extern tree build_va_arg (location_t, tree, tree);
742 struct diagnostic_context;
744 extern unsigned int c_common_option_lang_mask (void);
745 extern void c_common_initialize_diagnostics (struct diagnostic_context *);
746 extern bool c_common_complain_wrong_lang_p (const struct cl_option *);
747 extern void c_common_init_options (unsigned int, struct cl_decoded_option *);
748 extern bool c_common_post_options (const char **);
749 extern bool c_common_init (void);
750 extern void c_common_finish (void);
751 extern void c_common_parse_file (int);
752 extern alias_set_type c_common_get_alias_set (tree);
753 extern void c_register_builtin_type (tree, const char*);
754 extern bool c_promoting_integer_type_p (const_tree);
755 extern int self_promoting_args_p (const_tree);
756 extern tree strip_pointer_operator (tree);
757 extern tree strip_pointer_or_array_types (tree);
758 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
760 /* This is the basic parsing function. */
761 extern void c_parse_file (void);
762 /* This is misnamed, it actually performs end-of-compilation processing. */
763 extern void finish_file (void);
765 extern void warn_for_omitted_condop (location_t, tree);
767 /* These macros provide convenient access to the various _STMT nodes. */
769 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
770 if a statement expression. */
771 #define STATEMENT_LIST_STMT_EXPR(NODE) \
772 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
774 /* Nonzero if a label has been added to the statement list. */
775 #define STATEMENT_LIST_HAS_LABEL(NODE) \
776 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
778 /* C_MAYBE_CONST_EXPR accessors. */
779 #define C_MAYBE_CONST_EXPR_PRE(NODE) \
780 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
781 #define C_MAYBE_CONST_EXPR_EXPR(NODE) \
782 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
783 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE) \
784 TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
785 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE) \
786 TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
787 #define EXPR_INT_CONST_OPERANDS(EXPR) \
788 (INTEGRAL_TYPE_P (TREE_TYPE (EXPR)) \
789 && (TREE_CODE (EXPR) == INTEGER_CST \
790 || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR \
791 && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
793 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
794 #define DECL_C_BIT_FIELD(NODE) \
795 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
796 #define SET_DECL_C_BIT_FIELD(NODE) \
797 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
798 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
799 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
801 extern tree do_case (location_t, tree, tree);
802 extern tree build_stmt (location_t, enum tree_code, ...);
803 extern tree build_case_label (location_t, tree, tree, tree);
805 /* These functions must be defined by each front-end which implements
806 a variant of the C language. They are used in c-common.c. */
808 extern tree build_unary_op (location_t, enum tree_code, tree, int);
809 extern tree build_binary_op (location_t, enum tree_code, tree, tree, int);
810 extern tree perform_integral_promotions (tree);
812 /* These functions must be defined by each front-end which implements
813 a variant of the C language. They are used by port files. */
815 extern tree default_conversion (tree);
817 /* Given two integer or real types, return the type for their sum.
818 Given two compatible ANSI C types, returns the merged type. */
820 extern tree common_type (tree, tree);
822 extern tree decl_constant_value (tree);
824 /* Handle increment and decrement of boolean types. */
825 extern tree boolean_increment (enum tree_code, tree);
827 extern int case_compare (splay_tree_key, splay_tree_key);
829 extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree, tree);
831 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
833 extern tree build_function_call (location_t, tree, tree);
835 extern tree build_function_call_vec (location_t, tree,
836 VEC(tree,gc) *, VEC(tree,gc) *);
838 extern tree resolve_overloaded_builtin (location_t, tree, VEC(tree,gc) *);
840 extern tree finish_label_address_expr (tree, location_t);
842 /* Same function prototype, but the C and C++ front ends have
843 different implementations. Used in c-common.c. */
844 extern tree lookup_label (tree);
845 extern tree lookup_name (tree);
846 extern bool lvalue_p (const_tree);
848 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
849 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
851 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
853 extern void init_c_lex (void);
855 extern void c_cpp_builtins (cpp_reader *);
856 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
857 extern bool c_cpp_error (cpp_reader *, int, int, location_t, unsigned int,
858 const char *, va_list *)
859 ATTRIBUTE_GCC_DIAG(6,0);
861 /* Positive if an implicit `extern "C"' scope has just been entered;
862 negative if such a scope has just been exited. */
863 extern GTY(()) int pending_lang_change;
865 /* Information recorded about each file examined during compilation. */
869 int time; /* Time spent in the file. */
871 /* Flags used only by C++.
872 INTERFACE_ONLY nonzero means that we are in an "interface" section
873 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust
874 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and
875 INTERFACE_ONLY is zero, it means that we are responsible for
876 exporting definitions that others might need. */
877 short interface_only;
878 short interface_unknown;
881 struct c_fileinfo *get_fileinfo (const char *);
882 extern void dump_time_statistics (void);
884 extern bool c_dump_tree (void *, tree);
886 extern void verify_sequence_points (tree);
888 extern tree fold_offsetof (tree, tree);
890 /* Places where an lvalue, or modifiable lvalue, may be required.
891 Used to select diagnostic messages in lvalue_error and
901 extern void lvalue_error (enum lvalue_use);
903 extern int complete_array_type (tree *, tree, bool);
905 extern tree builtin_type_for_size (int, bool);
907 extern void warn_array_subscript_with_type_char (tree);
908 extern void warn_about_parentheses (enum tree_code,
909 enum tree_code, tree,
910 enum tree_code, tree);
911 extern void warn_for_unused_label (tree label);
912 extern void warn_for_div_by_zero (location_t, tree divisor);
913 extern void warn_for_sign_compare (location_t,
914 tree orig_op0, tree orig_op1,
917 enum tree_code resultcode);
918 extern void do_warn_double_promotion (tree, tree, tree, const char *,
920 extern void set_underlying_type (tree x);
921 extern VEC(tree,gc) *make_tree_vector (void);
922 extern void release_tree_vector (VEC(tree,gc) *);
923 extern VEC(tree,gc) *make_tree_vector_single (tree);
924 extern VEC(tree,gc) *make_tree_vector_copy (const VEC(tree,gc) *);
926 /* In c-gimplify.c */
927 extern void c_genericize (tree);
928 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
929 extern tree c_build_bind_expr (location_t, tree, tree);
932 extern void pch_init (void);
933 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
934 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
936 extern void c_common_write_pch (void);
937 extern void c_common_no_more_pch (void);
938 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
939 extern void c_common_print_pch_checksum (FILE *f);
941 /* In *-checksum.c */
942 extern const unsigned char executable_checksum[16];
944 /* In c-cppbuiltin.c */
945 extern void builtin_define_std (const char *macro);
946 extern void builtin_define_with_value (const char *, const char *, int);
947 extern void c_stddef_cpp_builtins (void);
948 extern void fe_file_change (const struct line_map *);
949 extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char);
951 /* Objective-C / Objective-C++ entry points. */
953 /* The following ObjC/ObjC++ functions are called by the C and/or C++
954 front-ends; they all must have corresponding stubs in stub-objc.c. */
955 extern tree objc_is_class_name (tree);
956 extern tree objc_is_object_ptr (tree);
957 extern void objc_check_decl (tree);
958 extern void objc_check_global_decl (tree);
959 extern tree objc_common_type (tree, tree);
960 extern bool objc_compare_types (tree, tree, int, tree);
961 extern bool objc_have_common_type (tree, tree, int, tree);
962 extern void objc_volatilize_decl (tree);
963 extern bool objc_type_quals_match (tree, tree);
964 extern tree objc_rewrite_function_call (tree, tree);
965 extern tree objc_message_selector (void);
966 extern tree objc_lookup_ivar (tree, tree);
967 extern void objc_clear_super_receiver (void);
968 extern int objc_is_public (tree, tree);
969 extern tree objc_is_id (tree);
970 extern void objc_declare_alias (tree, tree);
971 extern void objc_declare_class (tree);
972 extern void objc_declare_protocols (tree);
973 extern tree objc_build_message_expr (tree);
974 extern tree objc_finish_message_expr (tree, tree, tree);
975 extern tree objc_build_selector_expr (location_t, tree);
976 extern tree objc_build_protocol_expr (tree);
977 extern tree objc_build_encode_expr (tree);
978 extern tree objc_build_string_object (tree);
979 extern tree objc_get_protocol_qualified_type (tree, tree);
980 extern tree objc_get_class_reference (tree);
981 extern tree objc_get_class_ivars (tree);
982 extern tree objc_get_interface_ivars (tree);
983 extern void objc_start_class_interface (tree, tree, tree, tree);
984 extern void objc_start_category_interface (tree, tree, tree, tree);
985 extern void objc_start_protocol (tree, tree, tree);
986 extern void objc_continue_interface (void);
987 extern void objc_finish_interface (void);
988 extern void objc_start_class_implementation (tree, tree);
989 extern void objc_start_category_implementation (tree, tree);
990 extern void objc_continue_implementation (void);
991 extern void objc_finish_implementation (void);
992 extern void objc_set_visibility (int);
993 extern void objc_set_method_type (enum tree_code);
994 extern tree objc_build_method_signature (tree, tree, tree, bool);
995 extern void objc_add_method_declaration (tree, tree);
996 extern bool objc_start_method_definition (tree, tree);
997 extern void objc_finish_method_definition (tree);
998 extern void objc_add_instance_variable (tree);
999 extern tree objc_build_keyword_decl (tree, tree, tree, tree);
1000 extern tree objc_build_throw_stmt (location_t, tree);
1001 extern void objc_begin_try_stmt (location_t, tree);
1002 extern tree objc_finish_try_stmt (void);
1003 extern void objc_begin_catch_clause (tree);
1004 extern void objc_finish_catch_clause (void);
1005 extern void objc_build_finally_clause (location_t, tree);
1006 extern tree objc_build_synchronized (location_t, tree, tree);
1007 extern int objc_static_init_needed_p (void);
1008 extern tree objc_generate_static_init_call (tree);
1009 extern tree objc_generate_write_barrier (tree, enum tree_code, tree);
1011 /* The following are provided by the C and C++ front-ends, and called by
1013 extern void *objc_get_current_scope (void);
1014 extern void objc_mark_locals_volatile (void *);
1016 /* In c-ppoutput.c */
1017 extern void init_pp_output (FILE *);
1018 extern void preprocess_file (cpp_reader *);
1019 extern void pp_file_change (const struct line_map *);
1020 extern void pp_dir_change (cpp_reader *, const char *);
1021 extern bool check_missing_format_attribute (tree, tree);
1024 extern tree c_finish_omp_master (location_t, tree);
1025 extern tree c_finish_omp_critical (location_t, tree, tree);
1026 extern tree c_finish_omp_ordered (location_t, tree);
1027 extern void c_finish_omp_barrier (location_t);
1028 extern tree c_finish_omp_atomic (location_t, enum tree_code, tree, tree);
1029 extern void c_finish_omp_flush (location_t);
1030 extern void c_finish_omp_taskwait (location_t);
1031 extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree);
1032 extern void c_split_parallel_clauses (location_t, tree, tree *, tree *);
1033 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1035 /* Not in c-omp.c; provided by the front end. */
1036 extern bool c_omp_sharing_predetermined (tree);
1037 extern tree c_omp_remap_decl (tree, bool);
1038 extern void record_types_used_by_current_var_decl (tree);
1040 #endif /* ! GCC_C_COMMON_H */