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,
146 RID_AT_OPTIONAL, RID_AT_REQUIRED,
148 RID_AT_IMPLEMENTATION,
150 /* Named address support, mapping the keyword to a particular named address
151 number. Named address space 0 is reserved for the generic address. If
152 there are more than 254 named addresses, the addr_space_t type will need
153 to be grown from an unsigned char to unsigned short. */
154 RID_ADDR_SPACE_0, /* generic address */
171 RID_FIRST_ADDR_SPACE = RID_ADDR_SPACE_0,
172 RID_LAST_ADDR_SPACE = RID_ADDR_SPACE_15,
176 RID_FIRST_MODIFIER = RID_STATIC,
177 RID_LAST_MODIFIER = RID_ONEWAY,
179 RID_FIRST_CXX0X = RID_CONSTEXPR,
180 RID_LAST_CXX0X = RID_STATIC_ASSERT,
181 RID_FIRST_AT = RID_AT_ENCODE,
182 RID_LAST_AT = RID_AT_IMPLEMENTATION,
183 RID_FIRST_PQ = RID_IN,
184 RID_LAST_PQ = RID_ONEWAY
187 #define OBJC_IS_AT_KEYWORD(rid) \
188 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
189 (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
191 #define OBJC_IS_PQ_KEYWORD(rid) \
192 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
193 (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
195 /* OBJC_IS_CXX_KEYWORD recognizes the 'CXX_OBJC' keywords (such as
196 'class') which are shared in a subtle way between Objective-C and
197 C++. When the lexer is lexing in Objective-C/Objective-C++, if it
198 finds '@' followed by one of these identifiers (eg, '@class'), it
199 recognizes the whole as an Objective-C keyword. If the identifier
200 is found elsewhere, it follows the rules of the C/C++ language.
202 #define OBJC_IS_CXX_KEYWORD(rid) \
204 || rid == RID_PUBLIC || rid == RID_PROTECTED || rid == RID_PRIVATE \
205 || rid == RID_TRY || rid == RID_THROW || rid == RID_CATCH)
207 /* The elements of `ridpointers' are identifier nodes for the reserved
208 type names and storage classes. It is indexed by a RID_... value. */
209 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
211 /* Standard named or nameless data types of the C compiler. */
218 CTI_UNDERLYING_WCHAR_TYPE,
220 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
221 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
224 CTI_WIDEST_INT_LIT_TYPE,
225 CTI_WIDEST_UINT_LIT_TYPE,
227 /* Types for <stdint.h>, that may not be defined on all
239 CTI_INT_LEAST16_TYPE,
240 CTI_INT_LEAST32_TYPE,
241 CTI_INT_LEAST64_TYPE,
242 CTI_UINT_LEAST8_TYPE,
243 CTI_UINT_LEAST16_TYPE,
244 CTI_UINT_LEAST32_TYPE,
245 CTI_UINT_LEAST64_TYPE,
251 CTI_UINT_FAST16_TYPE,
252 CTI_UINT_FAST32_TYPE,
253 CTI_UINT_FAST64_TYPE,
258 CTI_CHAR16_ARRAY_TYPE,
259 CTI_CHAR32_ARRAY_TYPE,
260 CTI_WCHAR_ARRAY_TYPE,
263 CTI_CONST_STRING_TYPE,
265 /* Type for boolean expressions (bool in C++, int in C). */
268 CTI_TRUTHVALUE_FALSE,
270 CTI_DEFAULT_FUNCTION_TYPE,
272 /* These are not types, but we have to look them up all the time. */
273 CTI_FUNCTION_NAME_DECL,
274 CTI_PRETTY_FUNCTION_NAME_DECL,
275 CTI_C99_FUNCTION_NAME_DECL,
276 CTI_SAVED_FUNCTION_NAME_DECLS,
285 #define C_CPP_HASHNODE(id) \
286 (&(((struct c_common_identifier *) (id))->node))
287 #define C_RID_CODE(id) \
288 ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
289 #define C_SET_RID_CODE(id, code) \
290 (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
292 /* Identifier part common to the C front ends. Inherits from
293 tree_identifier, despite appearances. */
294 struct GTY(()) c_common_identifier {
295 struct tree_common common;
296 struct cpp_hashnode node;
299 /* An entry in the reserved keyword table. */
301 struct c_common_resword
303 const char *const word;
304 ENUM_BITFIELD(rid) const rid : 16;
305 const unsigned int disable : 16;
308 /* Disable mask. Keywords are disabled if (reswords[i].disable &
309 mask) is _true_. Thus for keywords which are present in all
310 languages the disable field is zero. */
312 #define D_CONLY 0x001 /* C only (not in C++). */
313 #define D_CXXONLY 0x002 /* C++ only (not in C). */
314 #define D_C99 0x004 /* In C, C99 only. */
315 #define D_CXX0X 0x008 /* In C++, C++0X only. */
316 #define D_EXT 0x010 /* GCC extension. */
317 #define D_EXT89 0x020 /* GCC extension incorporated in C99. */
318 #define D_ASM 0x040 /* Disabled by -fno-asm. */
319 #define D_OBJC 0x080 /* In Objective C and neither C nor C++. */
320 #define D_CXX_OBJC 0x100 /* In Objective C, and C++, but not C. */
321 #define D_CXXWARN 0x200 /* In C warn with -Wcxx-compat. */
323 /* The reserved keyword table. */
324 extern const struct c_common_resword c_common_reswords[];
326 /* The number of items in the reserved keyword table. */
327 extern const unsigned int num_c_common_reswords;
329 #define char16_type_node c_global_trees[CTI_CHAR16_TYPE]
330 #define char32_type_node c_global_trees[CTI_CHAR32_TYPE]
331 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
332 #define underlying_wchar_type_node c_global_trees[CTI_UNDERLYING_WCHAR_TYPE]
333 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
334 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
335 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
336 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
337 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
338 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
339 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
341 #define sig_atomic_type_node c_global_trees[CTI_SIG_ATOMIC_TYPE]
342 #define int8_type_node c_global_trees[CTI_INT8_TYPE]
343 #define int16_type_node c_global_trees[CTI_INT16_TYPE]
344 #define int32_type_node c_global_trees[CTI_INT32_TYPE]
345 #define int64_type_node c_global_trees[CTI_INT64_TYPE]
346 #define uint8_type_node c_global_trees[CTI_UINT8_TYPE]
347 #define uint16_type_node c_global_trees[CTI_UINT16_TYPE]
348 #define c_uint32_type_node c_global_trees[CTI_UINT32_TYPE]
349 #define c_uint64_type_node c_global_trees[CTI_UINT64_TYPE]
350 #define int_least8_type_node c_global_trees[CTI_INT_LEAST8_TYPE]
351 #define int_least16_type_node c_global_trees[CTI_INT_LEAST16_TYPE]
352 #define int_least32_type_node c_global_trees[CTI_INT_LEAST32_TYPE]
353 #define int_least64_type_node c_global_trees[CTI_INT_LEAST64_TYPE]
354 #define uint_least8_type_node c_global_trees[CTI_UINT_LEAST8_TYPE]
355 #define uint_least16_type_node c_global_trees[CTI_UINT_LEAST16_TYPE]
356 #define uint_least32_type_node c_global_trees[CTI_UINT_LEAST32_TYPE]
357 #define uint_least64_type_node c_global_trees[CTI_UINT_LEAST64_TYPE]
358 #define int_fast8_type_node c_global_trees[CTI_INT_FAST8_TYPE]
359 #define int_fast16_type_node c_global_trees[CTI_INT_FAST16_TYPE]
360 #define int_fast32_type_node c_global_trees[CTI_INT_FAST32_TYPE]
361 #define int_fast64_type_node c_global_trees[CTI_INT_FAST64_TYPE]
362 #define uint_fast8_type_node c_global_trees[CTI_UINT_FAST8_TYPE]
363 #define uint_fast16_type_node c_global_trees[CTI_UINT_FAST16_TYPE]
364 #define uint_fast32_type_node c_global_trees[CTI_UINT_FAST32_TYPE]
365 #define uint_fast64_type_node c_global_trees[CTI_UINT_FAST64_TYPE]
366 #define intptr_type_node c_global_trees[CTI_INTPTR_TYPE]
367 #define uintptr_type_node c_global_trees[CTI_UINTPTR_TYPE]
369 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
370 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
371 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
373 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
374 #define char16_array_type_node c_global_trees[CTI_CHAR16_ARRAY_TYPE]
375 #define char32_array_type_node c_global_trees[CTI_CHAR32_ARRAY_TYPE]
376 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
377 #define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
378 #define string_type_node c_global_trees[CTI_STRING_TYPE]
379 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
381 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
383 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
384 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
385 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
386 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
388 /* A node for `((void) 0)'. */
389 #define void_zero_node c_global_trees[CTI_VOID_ZERO]
391 /* The node for C++ `__null'. */
392 #define null_node c_global_trees[CTI_NULL]
394 extern GTY(()) tree c_global_trees[CTI_MAX];
396 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
397 tree for size reasons. */
398 struct GTY((variable_size)) sorted_fields_type {
400 tree GTY((length ("%h.len"))) elts[1];
403 /* Mark which labels are explicitly declared.
404 These may be shadowed, and may be referenced from nested functions. */
405 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
407 typedef enum c_language_kind
409 clk_c = 0, /* C90, C94 or C99 */
410 clk_objc = 1, /* clk_c with ObjC features. */
411 clk_cxx = 2, /* ANSI/ISO C++ */
412 clk_objcxx = 3 /* clk_cxx with ObjC features. */
416 /* To test for a specific language use c_language, defined by each
417 front end. For "ObjC features" or "not C++" use the macros. */
418 extern c_language_kind c_language;
420 #define c_dialect_cxx() ((c_language & clk_cxx) != 0)
421 #define c_dialect_objc() ((c_language & clk_objc) != 0)
423 /* The various name of operator that appears in error messages. */
424 typedef enum ref_operator {
433 /* implicit conversion */
434 RO_IMPLICIT_CONVERSION
437 /* Information about a statement tree. */
439 struct GTY(()) stmt_tree_s {
440 /* The current statement list being collected. */
441 tree x_cur_stmt_list;
443 /* In C++, Nonzero if we should treat statements as full
444 expressions. In particular, this variable is no-zero if at the
445 end of a statement we should destroy any temporaries created
446 during that statement. Similarly, if, at the end of a block, we
447 should destroy any local variables in this block. Normally, this
448 variable is nonzero, since those are the normal semantics of
451 However, in order to represent aggregate initialization code as
452 tree structure, we use statement-expressions. The statements
453 within the statement expression should not result in cleanups
454 being run until the entire enclosing statement is complete.
456 This flag has no effect in C. */
457 int stmts_are_full_exprs_p;
460 typedef struct stmt_tree_s *stmt_tree;
462 /* Global state pertinent to the current function. Some C dialects
463 extend this structure with additional fields. */
465 struct GTY(()) c_language_function {
466 /* While we are parsing the function, this contains information
467 about the statement-tree that we are building. */
468 struct stmt_tree_s x_stmt_tree;
471 /* When building a statement-tree, this is the current statement list
472 being collected. It's TREE_CHAIN is a back-pointer to the previous
475 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
477 /* Language-specific hooks. */
479 /* If non-NULL, this function is called after a precompile header file
481 extern void (*lang_post_pch_load) (void);
483 extern void push_file_scope (void);
484 extern void pop_file_scope (void);
485 extern stmt_tree current_stmt_tree (void);
486 extern tree push_stmt_list (void);
487 extern tree pop_stmt_list (tree);
488 extern tree add_stmt (tree);
489 extern void push_cleanup (tree, tree, bool);
490 extern tree pushdecl_top_level (tree);
491 extern tree pushdecl (tree);
492 extern tree build_modify_expr (location_t, tree, tree, enum tree_code,
493 location_t, tree, tree);
494 extern tree build_indirect_ref (location_t, tree, ref_operator);
496 extern int c_expand_decl (tree);
498 extern int field_decl_cmp (const void *, const void *);
499 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
501 extern bool has_c_linkage (const_tree decl);
503 /* Switches common to the C front ends. */
505 /* Nonzero means don't output line number information. */
507 extern char flag_no_line_commands;
509 /* Nonzero causes -E output not to be done, but directives such as
510 #define that have side effects are still obeyed. */
512 extern char flag_no_output;
514 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
515 'N' or 'U' of the command line switch. */
517 extern char flag_dump_macros;
519 /* Nonzero means pass #include lines through to the output. */
521 extern char flag_dump_includes;
523 /* Nonzero means process PCH files while preprocessing. */
525 extern bool flag_pch_preprocess;
527 /* The file name to which we should write a precompiled header, or
528 NULL if no header will be written in this compile. */
530 extern const char *pch_file;
532 /* Nonzero if an ISO standard was selected. It rejects macros in the
537 /* Warn about #pragma directives that are not recognized. */
539 extern int warn_unknown_pragmas; /* Tri state variable. */
541 /* Warn about format/argument anomalies in calls to formatted I/O functions
542 (*printf, *scanf, strftime, strfmon, etc.). */
544 extern int warn_format;
547 /* C/ObjC language option variables. */
550 /* Nonzero means allow type mismatches in conditional expressions;
551 just make their values `void'. */
553 extern int flag_cond_mismatch;
555 /* Nonzero means enable C89 Amendment 1 features. */
557 extern int flag_isoc94;
559 /* Nonzero means use the ISO C99 (or C1X) dialect of C. */
561 extern int flag_isoc99;
563 /* Nonzero means use the ISO C1X dialect of C. */
565 extern int flag_isoc1x;
567 /* Nonzero means that we have builtin functions, and main is an int. */
569 extern int flag_hosted;
571 /* ObjC language option variables. */
574 /* Tells the compiler that this is a special run. Do not perform any
575 compiling, instead we are to test some platform dependent features
576 and output a C header file with appropriate definitions. */
578 extern int print_struct_values;
580 /* Tells the compiler what is the constant string class for ObjC. */
582 extern const char *constant_string_class_name;
585 /* C++ language option variables. */
588 /* Nonzero means generate separate instantiation control files and
589 juggle them at link time. */
591 extern int flag_use_repository;
593 /* The supported C++ dialects. */
598 /* Experimental features that are likely to become part of
603 /* The C++ dialect being used. C++98 is the default. */
604 extern enum cxx_dialect cxx_dialect;
606 /* Maximum template instantiation depth. This limit is rather
607 arbitrary, but it exists to limit the time it takes to notice
608 infinite template instantiations. */
610 extern int max_tinst_depth;
612 /* Nonzero means that we should not issue warnings about problems that
613 occur when the code is executed, because the code being processed
614 is not expected to be executed. This is set during parsing. This
615 is used for cases like sizeof() and "0 ? a : b". This is a count,
616 not a bool, because unexecuted expressions can nest. */
618 extern int c_inhibit_evaluation_warnings;
620 /* Whether lexing has been completed, so subsequent preprocessor
621 errors should use the compiler's input_location. */
623 extern bool done_lexing;
625 /* C types are partitioned into three subsets: object, function, and
627 #define C_TYPE_OBJECT_P(type) \
628 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
630 #define C_TYPE_INCOMPLETE_P(type) \
631 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
633 #define C_TYPE_FUNCTION_P(type) \
634 (TREE_CODE (type) == FUNCTION_TYPE)
636 /* For convenience we define a single macro to identify the class of
637 object or incomplete types. */
638 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
639 (!C_TYPE_FUNCTION_P (type))
641 /* Attribute table common to the C front ends. */
642 extern const struct attribute_spec c_common_attribute_table[];
643 extern const struct attribute_spec c_common_format_attribute_table[];
645 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
646 ID is the identifier to use, NAME is the string.
647 TYPE_DEP indicates whether it depends on type of the function or not
648 (i.e. __PRETTY_FUNCTION__). */
650 extern tree (*make_fname_decl) (location_t, tree, int);
652 /* In c-decl.c and cp/tree.c. FIXME. */
653 extern void c_register_addr_space (const char *str, addr_space_t as);
656 extern const char *c_addr_space_name (addr_space_t as);
657 extern tree identifier_global_value (tree);
658 extern void record_builtin_type (enum rid, const char *, tree);
659 extern tree build_void_list_node (void);
660 extern void start_fname_decls (void);
661 extern void finish_fname_decls (void);
662 extern const char *fname_as_string (int);
663 extern tree fname_decl (location_t, unsigned, tree);
665 extern void check_function_arguments (tree, int, tree *, tree);
666 extern void check_function_arguments_recurse (void (*)
668 unsigned HOST_WIDE_INT),
670 unsigned HOST_WIDE_INT);
671 extern bool check_builtin_function_arguments (tree, int, tree *);
672 extern void check_function_format (tree, int, tree *);
673 extern void set_Wformat (int);
674 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
675 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
676 extern bool attribute_takes_identifier_p (const_tree);
677 extern bool c_common_handle_option (size_t, const char *, int, int,
678 const struct cl_option_handlers *);
679 extern tree c_common_type_for_mode (enum machine_mode, int);
680 extern tree c_common_type_for_size (unsigned int, int);
681 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
683 extern tree c_common_unsigned_type (tree);
684 extern tree c_common_signed_type (tree);
685 extern tree c_common_signed_or_unsigned_type (int, tree);
686 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
687 extern bool decl_with_nonnull_addr_p (const_tree);
688 extern tree c_fully_fold (tree, bool, bool *);
689 extern tree decl_constant_value_for_optimization (tree);
690 extern tree c_wrap_maybe_const (tree, bool);
691 extern tree c_save_expr (tree);
692 extern tree c_common_truthvalue_conversion (location_t, tree);
693 extern void c_apply_type_quals_to_decl (int, tree);
694 extern tree c_sizeof_or_alignof_type (location_t, tree, bool, int);
695 extern tree c_alignof_expr (location_t, tree);
696 /* Print an error message for invalid operands to arith operation CODE.
697 NOP_EXPR is used as a special case (see truthvalue_conversion). */
698 extern void binary_op_error (location_t, enum tree_code, tree, tree);
699 extern tree fix_string_type (tree);
700 extern void constant_expression_warning (tree);
701 extern void constant_expression_error (tree);
702 extern bool strict_aliasing_warning (tree, tree, tree);
703 extern void warnings_for_convert_and_check (tree, tree, tree);
704 extern tree convert_and_check (tree, tree);
705 extern void overflow_warning (location_t, tree);
706 extern void warn_logical_operator (location_t, enum tree_code, tree,
707 enum tree_code, tree, enum tree_code, tree);
708 extern void check_main_parameter_types (tree decl);
709 extern bool c_determine_visibility (tree);
710 extern bool same_scalar_type_ignoring_signedness (tree, tree);
711 extern void mark_valid_location_for_stdc_pragma (bool);
712 extern bool valid_location_for_stdc_pragma_p (void);
713 extern void set_float_const_decimal64 (void);
714 extern void clear_float_const_decimal64 (void);
715 extern bool float_const_decimal64_p (void);
717 #define c_sizeof(LOC, T) c_sizeof_or_alignof_type (LOC, T, true, 1)
718 #define c_alignof(LOC, T) c_sizeof_or_alignof_type (LOC, T, false, 1)
720 /* Subroutine of build_binary_op, used for certain operations. */
721 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
723 /* Subroutine of build_binary_op, used for comparison operations.
724 See if the operands have both been converted from subword integer types
725 and, if so, perhaps change them both back to their original type. */
726 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
728 extern tree pointer_int_sum (location_t, enum tree_code, tree, tree);
730 /* Add qualifiers to a type, in the fashion for C. */
731 extern tree c_build_qualified_type (tree, int);
733 /* Build tree nodes and builtin functions common to both C and C++ language
735 extern void c_common_nodes_and_builtins (void);
737 extern void disable_builtin_function (const char *);
739 extern void set_compound_literal_name (tree decl);
741 extern tree build_va_arg (location_t, tree, tree);
743 extern unsigned int c_common_option_lang_mask (void);
744 extern void c_common_initialize_diagnostics (diagnostic_context *);
745 extern bool c_common_complain_wrong_lang_p (const struct cl_option *);
746 extern void c_common_init_options (unsigned int, struct cl_decoded_option *);
747 extern bool c_common_post_options (const char **);
748 extern bool c_common_init (void);
749 extern void c_common_finish (void);
750 extern void c_common_parse_file (int);
751 extern alias_set_type c_common_get_alias_set (tree);
752 extern void c_register_builtin_type (tree, const char*);
753 extern bool c_promoting_integer_type_p (const_tree);
754 extern int self_promoting_args_p (const_tree);
755 extern tree strip_pointer_operator (tree);
756 extern tree strip_pointer_or_array_types (tree);
757 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
759 /* This is the basic parsing function. */
760 extern void c_parse_file (void);
761 /* This is misnamed, it actually performs end-of-compilation processing. */
762 extern void finish_file (void);
764 extern void warn_for_omitted_condop (location_t, tree);
766 /* These macros provide convenient access to the various _STMT nodes. */
768 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
769 if a statement expression. */
770 #define STATEMENT_LIST_STMT_EXPR(NODE) \
771 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
773 /* Nonzero if a label has been added to the statement list. */
774 #define STATEMENT_LIST_HAS_LABEL(NODE) \
775 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
777 /* C_MAYBE_CONST_EXPR accessors. */
778 #define C_MAYBE_CONST_EXPR_PRE(NODE) \
779 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 0)
780 #define C_MAYBE_CONST_EXPR_EXPR(NODE) \
781 TREE_OPERAND (C_MAYBE_CONST_EXPR_CHECK (NODE), 1)
782 #define C_MAYBE_CONST_EXPR_INT_OPERANDS(NODE) \
783 TREE_LANG_FLAG_0 (C_MAYBE_CONST_EXPR_CHECK (NODE))
784 #define C_MAYBE_CONST_EXPR_NON_CONST(NODE) \
785 TREE_LANG_FLAG_1 (C_MAYBE_CONST_EXPR_CHECK (NODE))
786 #define EXPR_INT_CONST_OPERANDS(EXPR) \
787 (INTEGRAL_TYPE_P (TREE_TYPE (EXPR)) \
788 && (TREE_CODE (EXPR) == INTEGER_CST \
789 || (TREE_CODE (EXPR) == C_MAYBE_CONST_EXPR \
790 && C_MAYBE_CONST_EXPR_INT_OPERANDS (EXPR))))
792 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
793 #define DECL_C_BIT_FIELD(NODE) \
794 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
795 #define SET_DECL_C_BIT_FIELD(NODE) \
796 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
797 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
798 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
800 extern tree do_case (location_t, tree, tree);
801 extern tree build_stmt (location_t, enum tree_code, ...);
802 extern tree build_case_label (location_t, tree, tree, tree);
804 /* These functions must be defined by each front-end which implements
805 a variant of the C language. They are used in c-common.c. */
807 extern tree build_unary_op (location_t, enum tree_code, tree, int);
808 extern tree build_binary_op (location_t, enum tree_code, tree, tree, int);
809 extern tree perform_integral_promotions (tree);
811 /* These functions must be defined by each front-end which implements
812 a variant of the C language. They are used by port files. */
814 extern tree default_conversion (tree);
816 /* Given two integer or real types, return the type for their sum.
817 Given two compatible ANSI C types, returns the merged type. */
819 extern tree common_type (tree, tree);
821 extern tree decl_constant_value (tree);
823 /* Handle increment and decrement of boolean types. */
824 extern tree boolean_increment (enum tree_code, tree);
826 extern int case_compare (splay_tree_key, splay_tree_key);
828 extern tree c_add_case_label (location_t, splay_tree, tree, tree, tree, tree);
830 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
832 extern tree build_function_call (location_t, tree, tree);
834 extern tree build_function_call_vec (location_t, tree,
835 VEC(tree,gc) *, VEC(tree,gc) *);
837 extern tree resolve_overloaded_builtin (location_t, tree, VEC(tree,gc) *);
839 extern tree finish_label_address_expr (tree, location_t);
841 /* Same function prototype, but the C and C++ front ends have
842 different implementations. Used in c-common.c. */
843 extern tree lookup_label (tree);
844 extern tree lookup_name (tree);
845 extern bool lvalue_p (const_tree);
847 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
848 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
850 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
852 extern void init_c_lex (void);
854 extern void c_cpp_builtins (cpp_reader *);
855 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
856 extern bool c_cpp_error (cpp_reader *, int, int, location_t, unsigned int,
857 const char *, va_list *)
858 ATTRIBUTE_GCC_DIAG(6,0);
860 /* Positive if an implicit `extern "C"' scope has just been entered;
861 negative if such a scope has just been exited. */
862 extern GTY(()) int pending_lang_change;
864 /* Information recorded about each file examined during compilation. */
868 int time; /* Time spent in the file. */
870 /* Flags used only by C++.
871 INTERFACE_ONLY nonzero means that we are in an "interface" section
872 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust
873 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and
874 INTERFACE_ONLY is zero, it means that we are responsible for
875 exporting definitions that others might need. */
876 short interface_only;
877 short interface_unknown;
880 struct c_fileinfo *get_fileinfo (const char *);
881 extern void dump_time_statistics (void);
883 extern bool c_dump_tree (void *, tree);
885 extern void verify_sequence_points (tree);
887 extern tree fold_offsetof (tree, tree);
889 /* Places where an lvalue, or modifiable lvalue, may be required.
890 Used to select diagnostic messages in lvalue_error and
900 extern void lvalue_error (enum lvalue_use);
902 extern int complete_array_type (tree *, tree, bool);
904 extern tree builtin_type_for_size (int, bool);
906 extern void warn_array_subscript_with_type_char (tree);
907 extern void warn_about_parentheses (enum tree_code,
908 enum tree_code, tree,
909 enum tree_code, tree);
910 extern void warn_for_unused_label (tree label);
911 extern void warn_for_div_by_zero (location_t, tree divisor);
912 extern void warn_for_sign_compare (location_t,
913 tree orig_op0, tree orig_op1,
916 enum tree_code resultcode);
917 extern void do_warn_double_promotion (tree, tree, tree, const char *,
919 extern void set_underlying_type (tree x);
920 extern VEC(tree,gc) *make_tree_vector (void);
921 extern void release_tree_vector (VEC(tree,gc) *);
922 extern VEC(tree,gc) *make_tree_vector_single (tree);
923 extern VEC(tree,gc) *make_tree_vector_copy (const VEC(tree,gc) *);
925 /* In c-gimplify.c */
926 extern void c_genericize (tree);
927 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
928 extern tree c_build_bind_expr (location_t, tree, tree);
931 extern void pch_init (void);
932 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
933 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
935 extern void c_common_write_pch (void);
936 extern void c_common_no_more_pch (void);
937 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
938 extern void c_common_print_pch_checksum (FILE *f);
940 /* In *-checksum.c */
941 extern const unsigned char executable_checksum[16];
943 /* In c-cppbuiltin.c */
944 extern void builtin_define_std (const char *macro);
945 extern void builtin_define_with_value (const char *, const char *, int);
946 extern void c_stddef_cpp_builtins (void);
947 extern void fe_file_change (const struct line_map *);
948 extern void c_parse_error (const char *, enum cpp_ttype, tree, unsigned char);
950 /* Objective-C / Objective-C++ entry points. */
952 /* The following ObjC/ObjC++ functions are called by the C and/or C++
953 front-ends; they all must have corresponding stubs in stub-objc.c. */
954 extern tree objc_is_class_name (tree);
955 extern tree objc_is_object_ptr (tree);
956 extern void objc_check_decl (tree);
957 extern void objc_check_global_decl (tree);
958 extern tree objc_common_type (tree, tree);
959 extern bool objc_compare_types (tree, tree, int, tree);
960 extern bool objc_have_common_type (tree, tree, int, tree);
961 extern void objc_volatilize_decl (tree);
962 extern bool objc_type_quals_match (tree, tree);
963 extern tree objc_rewrite_function_call (tree, tree);
964 extern tree objc_message_selector (void);
965 extern tree objc_lookup_ivar (tree, tree);
966 extern void objc_clear_super_receiver (void);
967 extern int objc_is_public (tree, tree);
968 extern tree objc_is_id (tree);
969 extern void objc_declare_alias (tree, tree);
970 extern void objc_declare_class (tree);
971 extern void objc_declare_protocols (tree);
972 extern tree objc_build_message_expr (tree);
973 extern tree objc_finish_message_expr (tree, tree, tree);
974 extern tree objc_build_selector_expr (location_t, tree);
975 extern tree objc_build_protocol_expr (tree);
976 extern tree objc_build_encode_expr (tree);
977 extern tree objc_build_string_object (tree);
978 extern tree objc_get_protocol_qualified_type (tree, tree);
979 extern tree objc_get_class_reference (tree);
980 extern tree objc_get_class_ivars (tree);
981 extern tree objc_get_interface_ivars (tree);
982 extern void objc_start_class_interface (tree, tree, tree, tree);
983 extern void objc_start_category_interface (tree, tree, tree, tree);
984 extern void objc_start_protocol (tree, tree, tree);
985 extern void objc_continue_interface (void);
986 extern void objc_finish_interface (void);
987 extern void objc_start_class_implementation (tree, tree);
988 extern void objc_start_category_implementation (tree, tree);
989 extern void objc_continue_implementation (void);
990 extern void objc_finish_implementation (void);
991 extern void objc_set_visibility (int);
992 extern void objc_set_method_type (enum tree_code);
993 extern tree objc_build_method_signature (tree, tree, tree, bool);
994 extern void objc_add_method_declaration (tree, tree);
995 extern bool objc_start_method_definition (tree, tree);
996 extern void objc_finish_method_definition (tree);
997 extern void objc_add_instance_variable (tree);
998 extern tree objc_build_keyword_decl (tree, tree, tree, tree);
999 extern tree objc_build_throw_stmt (location_t, tree);
1000 extern void objc_begin_try_stmt (location_t, tree);
1001 extern tree objc_finish_try_stmt (void);
1002 extern void objc_begin_catch_clause (tree);
1003 extern void objc_finish_catch_clause (void);
1004 extern void objc_build_finally_clause (location_t, tree);
1005 extern tree objc_build_synchronized (location_t, tree, tree);
1006 extern int objc_static_init_needed_p (void);
1007 extern tree objc_generate_static_init_call (tree);
1008 extern tree objc_generate_write_barrier (tree, enum tree_code, tree);
1009 extern void objc_set_method_opt (bool);
1010 extern void objc_finish_foreach_loop (location_t, tree, tree, tree, tree, tree);
1012 /* The following are provided by the C and C++ front-ends, and called by
1014 extern void *objc_get_current_scope (void);
1015 extern void objc_mark_locals_volatile (void *);
1017 /* In c-ppoutput.c */
1018 extern void init_pp_output (FILE *);
1019 extern void preprocess_file (cpp_reader *);
1020 extern void pp_file_change (const struct line_map *);
1021 extern void pp_dir_change (cpp_reader *, const char *);
1022 extern bool check_missing_format_attribute (tree, tree);
1025 extern tree c_finish_omp_master (location_t, tree);
1026 extern tree c_finish_omp_critical (location_t, tree, tree);
1027 extern tree c_finish_omp_ordered (location_t, tree);
1028 extern void c_finish_omp_barrier (location_t);
1029 extern tree c_finish_omp_atomic (location_t, enum tree_code, tree, tree);
1030 extern void c_finish_omp_flush (location_t);
1031 extern void c_finish_omp_taskwait (location_t);
1032 extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree);
1033 extern void c_split_parallel_clauses (location_t, tree, tree *, tree *);
1034 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1036 /* Not in c-omp.c; provided by the front end. */
1037 extern bool c_omp_sharing_predetermined (tree);
1038 extern tree c_omp_remap_decl (tree, bool);
1039 extern void record_types_used_by_current_var_decl (tree);
1041 #endif /* ! GCC_C_COMMON_H */