1 /* Definitions for c-common.c.
2 Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
21 #ifndef GCC_C_COMMON_H
22 #define GCC_C_COMMON_H
24 #include "splay-tree.h"
28 /* Usage of TREE_LANG_FLAG_?:
29 0: TREE_NEGATED_INT (in INTEGER_CST).
30 IDENTIFIER_MARKED (used by search routines).
31 DECL_PRETTY_FUNCTION_P (in VAR_DECL)
32 1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
33 STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
35 3: STATEMENT_LIST_HAS_LABEL (in STATEMENT_LIST)
39 /* Reserved identifiers. This is the union of all the keywords for C,
40 C++, and Objective-C. All the type modifiers have to be in one
41 block at the beginning, because they are used as mask bits. There
42 are 27 type modifiers; if we add many more we will have to redesign
43 the mask mechanism. */
48 /* C, in empirical order of frequency. */
50 RID_UNSIGNED, RID_LONG, RID_CONST, RID_EXTERN,
51 RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
52 RID_VOLATILE, RID_SIGNED, RID_AUTO, RID_RESTRICT,
55 RID_COMPLEX, RID_THREAD, RID_SAT,
58 RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
61 RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
64 RID_INT, RID_CHAR, RID_FLOAT, RID_DOUBLE, RID_VOID,
65 RID_ENUM, RID_STRUCT, RID_UNION, RID_IF, RID_ELSE,
66 RID_WHILE, RID_DO, RID_FOR, RID_SWITCH, RID_CASE,
67 RID_DEFAULT, RID_BREAK, RID_CONTINUE, RID_RETURN, RID_GOTO,
71 RID_ASM, RID_TYPEOF, RID_ALIGNOF, RID_ATTRIBUTE, RID_VA_ARG,
72 RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL, RID_CHOOSE_EXPR,
73 RID_TYPES_COMPATIBLE_P,
74 RID_DFLOAT32, RID_DFLOAT64, RID_DFLOAT128,
77 /* This means to warn that this is a C++ keyword, and then treat it
78 as a normal identifier. */
81 /* Too many ways of getting the name of a function as a string */
82 RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
85 RID_BOOL, RID_WCHAR, RID_CLASS,
86 RID_PUBLIC, RID_PRIVATE, RID_PROTECTED,
87 RID_TEMPLATE, RID_NULL, RID_CATCH,
88 RID_DELETE, RID_FALSE, RID_NAMESPACE,
89 RID_NEW, RID_OFFSETOF, RID_OPERATOR,
90 RID_THIS, RID_THROW, RID_TRUE,
91 RID_TRY, RID_TYPENAME, RID_TYPEID,
92 RID_USING, RID_CHAR16, RID_CHAR32,
95 RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
98 RID_HAS_NOTHROW_ASSIGN, RID_HAS_NOTHROW_CONSTRUCTOR,
99 RID_HAS_NOTHROW_COPY, RID_HAS_TRIVIAL_ASSIGN,
100 RID_HAS_TRIVIAL_CONSTRUCTOR, RID_HAS_TRIVIAL_COPY,
101 RID_HAS_TRIVIAL_DESTRUCTOR, RID_HAS_VIRTUAL_DESTRUCTOR,
102 RID_IS_ABSTRACT, RID_IS_BASE_OF,
103 RID_IS_CONVERTIBLE_TO, RID_IS_CLASS,
104 RID_IS_EMPTY, RID_IS_ENUM,
105 RID_IS_POD, RID_IS_POLYMORPHIC,
109 RID_STATIC_ASSERT, RID_DECLTYPE,
112 RID_AT_ENCODE, RID_AT_END,
113 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS,
114 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC,
115 RID_AT_PROTOCOL, RID_AT_SELECTOR,
116 RID_AT_THROW, RID_AT_TRY, RID_AT_CATCH,
117 RID_AT_FINALLY, RID_AT_SYNCHRONIZED,
119 RID_AT_IMPLEMENTATION,
123 RID_FIRST_MODIFIER = RID_STATIC,
124 RID_LAST_MODIFIER = RID_ONEWAY,
126 RID_FIRST_CXX0X = RID_STATIC_ASSERT,
127 RID_LAST_CXX0X = RID_DECLTYPE,
128 RID_FIRST_AT = RID_AT_ENCODE,
129 RID_LAST_AT = RID_AT_IMPLEMENTATION,
130 RID_FIRST_PQ = RID_IN,
131 RID_LAST_PQ = RID_ONEWAY
134 #define OBJC_IS_AT_KEYWORD(rid) \
135 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
136 (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
138 #define OBJC_IS_PQ_KEYWORD(rid) \
139 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
140 (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
142 /* The elements of `ridpointers' are identifier nodes for the reserved
143 type names and storage classes. It is indexed by a RID_... value. */
144 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
146 /* Standard named or nameless data types of the C compiler. */
153 CTI_SIGNED_WCHAR_TYPE,
154 CTI_UNSIGNED_WCHAR_TYPE,
156 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
157 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
160 CTI_WIDEST_INT_LIT_TYPE,
161 CTI_WIDEST_UINT_LIT_TYPE,
164 CTI_CHAR16_ARRAY_TYPE,
165 CTI_CHAR32_ARRAY_TYPE,
166 CTI_WCHAR_ARRAY_TYPE,
169 CTI_CONST_STRING_TYPE,
171 /* Type for boolean expressions (bool in C++, int in C). */
174 CTI_TRUTHVALUE_FALSE,
176 CTI_DEFAULT_FUNCTION_TYPE,
178 /* These are not types, but we have to look them up all the time. */
179 CTI_FUNCTION_NAME_DECL,
180 CTI_PRETTY_FUNCTION_NAME_DECL,
181 CTI_C99_FUNCTION_NAME_DECL,
182 CTI_SAVED_FUNCTION_NAME_DECLS,
191 #define C_RID_CODE(id) \
192 ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
193 #define C_SET_RID_CODE(id, code) \
194 (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
196 /* Identifier part common to the C front ends. Inherits from
197 tree_identifier, despite appearances. */
198 struct c_common_identifier GTY(())
200 struct tree_common common;
201 struct cpp_hashnode node;
204 /* An entry in the reserved keyword table. */
206 struct c_common_resword
208 const char *const word;
209 ENUM_BITFIELD(rid) const rid : 16;
210 const unsigned int disable : 16;
213 /* Disable mask. Keywords are disabled if (reswords[i].disable &
214 mask) is _true_. Thus for keywords which are present in all
215 languages the disable field is zero. */
217 #define D_CONLY 0x001 /* C only (not in C++). */
218 #define D_CXXONLY 0x002 /* C++ only (not in C). */
219 #define D_C99 0x004 /* In C, C99 only. */
220 #define D_CXX0X 0x008 /* In C++, C++0X only. */
221 #define D_EXT 0x010 /* GCC extension. */
222 #define D_EXT89 0x020 /* GCC extension incorporated in C99. */
223 #define D_ASM 0x040 /* Disabled by -fno-asm. */
224 #define D_OBJC 0x080 /* In Objective C and neither C nor C++. */
225 #define D_CXX_OBJC 0x100 /* In Objective C, and C++, but not C. */
226 #define D_CXXWARN 0x200 /* In C warn with -Wcxx-compat. */
228 /* The reserved keyword table. */
229 extern const struct c_common_resword c_common_reswords[];
231 /* The number of items in the reserved keyword table. */
232 extern const unsigned int num_c_common_reswords;
234 #define char16_type_node c_global_trees[CTI_CHAR16_TYPE]
235 #define char32_type_node c_global_trees[CTI_CHAR32_TYPE]
236 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
237 #define signed_wchar_type_node c_global_trees[CTI_SIGNED_WCHAR_TYPE]
238 #define unsigned_wchar_type_node c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
239 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
240 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
241 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
242 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
243 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
244 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
245 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
247 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
248 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
249 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
251 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
252 #define char16_array_type_node c_global_trees[CTI_CHAR16_ARRAY_TYPE]
253 #define char32_array_type_node c_global_trees[CTI_CHAR32_ARRAY_TYPE]
254 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
255 #define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
256 #define string_type_node c_global_trees[CTI_STRING_TYPE]
257 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
259 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
261 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
262 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
263 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
264 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
266 /* A node for `((void) 0)'. */
267 #define void_zero_node c_global_trees[CTI_VOID_ZERO]
269 /* The node for C++ `__null'. */
270 #define null_node c_global_trees[CTI_NULL]
272 extern GTY(()) tree c_global_trees[CTI_MAX];
274 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
275 tree for size reasons. */
276 struct sorted_fields_type GTY(())
279 tree GTY((length ("%h.len"))) elts[1];
282 /* Mark which labels are explicitly declared.
283 These may be shadowed, and may be referenced from nested functions. */
284 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
286 typedef enum c_language_kind
288 clk_c = 0, /* C90, C94 or C99 */
289 clk_objc = 1, /* clk_c with ObjC features. */
290 clk_cxx = 2, /* ANSI/ISO C++ */
291 clk_objcxx = 3 /* clk_cxx with ObjC features. */
295 /* To test for a specific language use c_language, defined by each
296 front end. For "ObjC features" or "not C++" use the macros. */
297 extern c_language_kind c_language;
299 #define c_dialect_cxx() (c_language & clk_cxx)
300 #define c_dialect_objc() (c_language & clk_objc)
302 /* Information about a statement tree. */
304 struct stmt_tree_s GTY(()) {
305 /* The current statement list being collected. */
306 tree x_cur_stmt_list;
308 /* In C++, Nonzero if we should treat statements as full
309 expressions. In particular, this variable is no-zero if at the
310 end of a statement we should destroy any temporaries created
311 during that statement. Similarly, if, at the end of a block, we
312 should destroy any local variables in this block. Normally, this
313 variable is nonzero, since those are the normal semantics of
316 However, in order to represent aggregate initialization code as
317 tree structure, we use statement-expressions. The statements
318 within the statement expression should not result in cleanups
319 being run until the entire enclosing statement is complete.
321 This flag has no effect in C. */
322 int stmts_are_full_exprs_p;
325 typedef struct stmt_tree_s *stmt_tree;
327 /* Global state pertinent to the current function. Some C dialects
328 extend this structure with additional fields. */
330 struct c_language_function GTY(()) {
331 /* While we are parsing the function, this contains information
332 about the statement-tree that we are building. */
333 struct stmt_tree_s x_stmt_tree;
336 /* When building a statement-tree, this is the current statement list
337 being collected. It's TREE_CHAIN is a back-pointer to the previous
340 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
342 /* Language-specific hooks. */
344 /* If non-NULL, this function is called after a precompile header file
346 extern void (*lang_post_pch_load) (void);
348 extern void push_file_scope (void);
349 extern void pop_file_scope (void);
350 extern stmt_tree current_stmt_tree (void);
351 extern tree push_stmt_list (void);
352 extern tree pop_stmt_list (tree);
353 extern tree add_stmt (tree);
354 extern void push_cleanup (tree, tree, bool);
355 extern tree pushdecl_top_level (tree);
356 extern tree pushdecl (tree);
357 extern tree build_modify_expr (tree, enum tree_code, tree);
358 extern tree build_indirect_ref (tree, const char *);
360 extern int c_expand_decl (tree);
362 extern int field_decl_cmp (const void *, const void *);
363 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
365 extern bool has_c_linkage (const_tree decl);
367 /* Switches common to the C front ends. */
369 /* Nonzero if prepreprocessing only. */
371 extern int flag_preprocess_only;
373 /* Zero means that faster, ...NonNil variants of objc_msgSend...
374 calls will be used in ObjC; passing nil receivers to such calls
375 will most likely result in crashes. */
376 extern int flag_nil_receivers;
378 /* Nonzero means that we will allow new ObjC exception syntax (@throw,
379 @try, etc.) in source code. */
380 extern int flag_objc_exceptions;
382 /* Nonzero means that we generate NeXT setjmp based exceptions. */
383 extern int flag_objc_sjlj_exceptions;
385 /* Nonzero means that code generation will be altered to support
386 "zero-link" execution. This currently affects ObjC only, but may
387 affect other languages in the future. */
388 extern int flag_zero_link;
390 /* Nonzero means emit an '__OBJC, __image_info' for the current translation
391 unit. It will inform the ObjC runtime that class definition(s) herein
392 contained are to replace one(s) previously loaded. */
393 extern int flag_replace_objc_classes;
395 /* Nonzero means don't output line number information. */
397 extern char flag_no_line_commands;
399 /* Nonzero causes -E output not to be done, but directives such as
400 #define that have side effects are still obeyed. */
402 extern char flag_no_output;
404 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
405 'N' or 'U' of the command line switch. */
407 extern char flag_dump_macros;
409 /* Nonzero means pass #include lines through to the output. */
411 extern char flag_dump_includes;
413 /* Nonzero means process PCH files while preprocessing. */
415 extern bool flag_pch_preprocess;
417 /* The file name to which we should write a precompiled header, or
418 NULL if no header will be written in this compile. */
420 extern const char *pch_file;
422 /* Nonzero if an ISO standard was selected. It rejects macros in the
427 /* Nonzero if -undef was given. It suppresses target built-in macros
430 extern int flag_undef;
432 /* Nonzero means don't recognize the non-ANSI builtin functions. */
434 extern int flag_no_builtin;
436 /* Nonzero means don't recognize the non-ANSI builtin functions.
439 extern int flag_no_nonansi_builtin;
441 /* Nonzero means give `double' the same size as `float'. */
443 extern int flag_short_double;
445 /* Nonzero means give `wchar_t' the same size as `short'. */
447 extern int flag_short_wchar;
449 /* Nonzero means allow implicit conversions between vectors with
450 differing numbers of subparts and/or differing element types. */
451 extern int flag_lax_vector_conversions;
453 /* Nonzero means allow Microsoft extensions without warnings or errors. */
454 extern int flag_ms_extensions;
456 /* Nonzero means don't recognize the keyword `asm'. */
458 extern int flag_no_asm;
460 /* Nonzero means give string constants the type `const char *', as mandated
463 extern int flag_const_strings;
465 /* Nonzero means to treat bitfields as signed unless they say `unsigned'. */
467 extern int flag_signed_bitfields;
469 /* Warn about #pragma directives that are not recognized. */
471 extern int warn_unknown_pragmas; /* Tri state variable. */
473 /* Warn about format/argument anomalies in calls to formatted I/O functions
474 (*printf, *scanf, strftime, strfmon, etc.). */
476 extern int warn_format;
479 /* C/ObjC language option variables. */
482 /* Nonzero means allow type mismatches in conditional expressions;
483 just make their values `void'. */
485 extern int flag_cond_mismatch;
487 /* Nonzero means enable C89 Amendment 1 features. */
489 extern int flag_isoc94;
491 /* Nonzero means use the ISO C99 dialect of C. */
493 extern int flag_isoc99;
495 /* Nonzero means that we have builtin functions, and main is an int. */
497 extern int flag_hosted;
499 /* Warn if main is suspicious. */
501 extern int warn_main;
504 /* ObjC language option variables. */
507 /* Open and close the file for outputting class declarations, if
510 extern int flag_gen_declaration;
512 /* Tells the compiler that this is a special run. Do not perform any
513 compiling, instead we are to test some platform dependent features
514 and output a C header file with appropriate definitions. */
516 extern int print_struct_values;
518 /* ???. Undocumented. */
520 extern const char *constant_string_class_name;
523 /* C++ language option variables. */
526 /* Nonzero means don't recognize any extension keywords. */
528 extern int flag_no_gnu_keywords;
530 /* Nonzero means do emit exported implementations of functions even if
531 they can be inlined. */
533 extern int flag_implement_inlines;
535 /* Nonzero means that implicit instantiations will be emitted if needed. */
537 extern int flag_implicit_templates;
539 /* Nonzero means that implicit instantiations of inline templates will be
540 emitted if needed, even if instantiations of non-inline templates
543 extern int flag_implicit_inline_templates;
545 /* Nonzero means generate separate instantiation control files and
546 juggle them at link time. */
548 extern int flag_use_repository;
550 /* Nonzero if we want to issue diagnostics that the standard says are not
553 extern int flag_optional_diags;
555 /* Nonzero means we should attempt to elide constructors when possible. */
557 extern int flag_elide_constructors;
559 /* Nonzero means that member functions defined in class scope are
560 inline by default. */
562 extern int flag_default_inline;
564 /* Controls whether compiler generates 'type descriptor' that give
565 run-time type information. */
567 extern int flag_rtti;
569 /* Nonzero if we want to conserve space in the .o files. We do this
570 by putting uninitialized data and runtime initialized data into
571 .common instead of .data at the expense of not flagging multiple
574 extern int flag_conserve_space;
576 /* Nonzero if we want to obey access control semantics. */
578 extern int flag_access_control;
580 /* Nonzero if we want to check the return value of new and avoid calling
581 constructors if it is a null pointer. */
583 extern int flag_check_new;
585 /* The supported C++ dialects. */
590 /* Experimental features that are likely to become part of
595 /* The C++ dialect being used. C++98 is the default. */
596 extern enum cxx_dialect cxx_dialect;
598 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
599 initialization variables.
600 0: Old rules, set by -fno-for-scope.
601 2: New ISO rules, set by -ffor-scope.
602 1: Try to implement new ISO rules, but with backup compatibility
603 (and warnings). This is the default, for now. */
605 extern int flag_new_for_scope;
607 /* Nonzero if we want to emit defined symbols with common-like linkage as
608 weak symbols where possible, in order to conform to C++ semantics.
609 Otherwise, emit them as local symbols. */
611 extern int flag_weak;
613 /* 0 means we want the preprocessor to not emit line directives for
614 the current working directory. 1 means we want it to do it. -1
615 means we should decide depending on whether debugging information
616 is being emitted or not. */
618 extern int flag_working_directory;
620 /* Nonzero to use __cxa_atexit, rather than atexit, to register
621 destructors for local statics and global objects. */
623 extern int flag_use_cxa_atexit;
625 /* Nonzero to use __cxa_get_exception_ptr in the C++ exception-handling
628 extern int flag_use_cxa_get_exception_ptr;
630 /* Nonzero means to implement standard semantics for exception
631 specifications, calling unexpected if an exception is thrown that
632 doesn't match the specification. Zero means to treat them as
633 assertions and optimize accordingly, but not check them. */
635 extern int flag_enforce_eh_specs;
637 /* Nonzero (the default) means to generate thread-safe code for
638 initializing local statics. */
640 extern int flag_threadsafe_statics;
642 /* Nonzero means warn about implicit declarations. */
644 extern int warn_implicit;
646 /* Warn about using __null (as NULL in C++) as sentinel. For code compiled
647 with GCC this doesn't matter as __null is guaranteed to have the right
650 extern int warn_strict_null_sentinel;
652 /* Maximum template instantiation depth. This limit is rather
653 arbitrary, but it exists to limit the time it takes to notice
654 infinite template instantiations. */
656 extern int max_tinst_depth;
658 /* Nonzero means the expression being parsed will never be evaluated.
659 This is a count, since unevaluated expressions can nest. */
661 extern int skip_evaluation;
663 /* C types are partitioned into three subsets: object, function, and
665 #define C_TYPE_OBJECT_P(type) \
666 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
668 #define C_TYPE_INCOMPLETE_P(type) \
669 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
671 #define C_TYPE_FUNCTION_P(type) \
672 (TREE_CODE (type) == FUNCTION_TYPE)
674 /* For convenience we define a single macro to identify the class of
675 object or incomplete types. */
676 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
677 (!C_TYPE_FUNCTION_P (type))
679 /* Attribute table common to the C front ends. */
680 extern const struct attribute_spec c_common_attribute_table[];
681 extern const struct attribute_spec c_common_format_attribute_table[];
683 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
684 ID is the identifier to use, NAME is the string.
685 TYPE_DEP indicates whether it depends on type of the function or not
686 (i.e. __PRETTY_FUNCTION__). */
688 extern tree (*make_fname_decl) (tree, int);
690 extern tree identifier_global_value (tree);
691 extern void record_builtin_type (enum rid, const char *, tree);
692 extern tree build_void_list_node (void);
693 extern void start_fname_decls (void);
694 extern void finish_fname_decls (void);
695 extern const char *fname_as_string (int);
696 extern tree fname_decl (unsigned, tree);
698 extern void check_function_arguments (tree, int, tree *, tree);
699 extern void check_function_arguments_recurse (void (*)
701 unsigned HOST_WIDE_INT),
703 unsigned HOST_WIDE_INT);
704 extern bool check_builtin_function_arguments (tree, int, tree *);
705 extern void check_function_format (tree, int, tree *);
706 extern void set_Wformat (int);
707 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
708 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
709 extern int c_common_handle_option (size_t code, const char *arg, int value);
710 extern bool c_common_missing_argument (const char *opt, size_t code);
711 extern tree c_common_type_for_mode (enum machine_mode, int);
712 extern tree c_common_type_for_size (unsigned int, int);
713 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
715 extern tree c_common_unsigned_type (tree);
716 extern tree c_common_signed_type (tree);
717 extern tree c_common_signed_or_unsigned_type (int, tree);
718 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
719 extern bool decl_with_nonnull_addr_p (const_tree);
720 extern tree c_common_truthvalue_conversion (tree);
721 extern void c_apply_type_quals_to_decl (int, tree);
722 extern tree c_sizeof_or_alignof_type (tree, bool, int);
723 extern tree c_alignof_expr (tree);
724 /* Print an error message for invalid operands to arith operation CODE.
725 NOP_EXPR is used as a special case (see truthvalue_conversion). */
726 extern void binary_op_error (enum tree_code, tree, tree);
727 extern tree fix_string_type (tree);
728 struct varray_head_tag;
729 extern void constant_expression_warning (tree);
730 extern void constant_expression_error (tree);
731 extern bool strict_aliasing_warning (tree, tree, tree);
732 extern void empty_if_body_warning (tree, tree);
733 extern void warnings_for_convert_and_check (tree, tree, tree);
734 extern tree convert_and_check (tree, tree);
735 extern void overflow_warning (tree);
736 extern void warn_logical_operator (enum tree_code, tree, tree);
737 extern void check_main_parameter_types (tree decl);
738 extern bool c_determine_visibility (tree);
739 extern bool same_scalar_type_ignoring_signedness (tree, tree);
741 #define c_sizeof(T) c_sizeof_or_alignof_type (T, true, 1)
742 #define c_alignof(T) c_sizeof_or_alignof_type (T, false, 1)
744 /* Subroutine of build_binary_op, used for comparison operations.
745 See if the operands have both been converted from subword integer types
746 and, if so, perhaps change them both back to their original type. */
747 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
749 extern tree pointer_int_sum (enum tree_code, tree, tree);
750 extern unsigned int min_precision (tree, int);
752 /* Add qualifiers to a type, in the fashion for C. */
753 extern tree c_build_qualified_type (tree, int);
755 /* Build tree nodes and builtin functions common to both C and C++ language
757 extern void c_common_nodes_and_builtins (void);
759 extern void set_builtin_user_assembler_name (tree decl, const char *asmspec);
761 extern void disable_builtin_function (const char *);
763 extern void set_compound_literal_name (tree decl);
765 extern tree build_va_arg (tree, tree);
767 extern unsigned int c_common_init_options (unsigned int, const char **);
768 extern bool c_common_post_options (const char **);
769 extern bool c_common_init (void);
770 extern void c_common_finish (void);
771 extern void c_common_parse_file (int);
772 extern alias_set_type c_common_get_alias_set (tree);
773 extern void c_register_builtin_type (tree, const char*);
774 extern bool c_promoting_integer_type_p (const_tree);
775 extern int self_promoting_args_p (const_tree);
776 extern tree strip_pointer_operator (tree);
777 extern tree strip_pointer_or_array_types (tree);
778 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
780 /* This is the basic parsing function. */
781 extern void c_parse_file (void);
782 /* This is misnamed, it actually performs end-of-compilation processing. */
783 extern void finish_file (void);
786 /* These macros provide convenient access to the various _STMT nodes. */
788 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
789 if a statement expression. */
790 #define STATEMENT_LIST_STMT_EXPR(NODE) \
791 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
793 /* Nonzero if a label has been added to the statement list. */
794 #define STATEMENT_LIST_HAS_LABEL(NODE) \
795 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
797 /* COMPOUND_LITERAL_EXPR accessors. */
798 #define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \
799 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
800 #define COMPOUND_LITERAL_EXPR_DECL(NODE) \
801 DECL_EXPR_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
803 extern int anon_aggr_type_p (const_tree);
805 /* For a VAR_DECL that is an anonymous union, these are the various
806 sub-variables that make up the anonymous union. */
807 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
809 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
810 #define DECL_C_BIT_FIELD(NODE) \
811 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
812 #define SET_DECL_C_BIT_FIELD(NODE) \
813 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
814 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
815 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
817 extern void emit_local_var (tree);
818 extern tree do_case (tree, tree);
819 extern tree build_stmt (enum tree_code, ...);
820 extern tree build_case_label (tree, tree, tree);
822 /* These functions must be defined by each front-end which implements
823 a variant of the C language. They are used in c-common.c. */
825 extern tree build_unary_op (enum tree_code, tree, int);
826 extern tree build_binary_op (enum tree_code, tree, tree, int);
827 extern tree perform_integral_promotions (tree);
829 /* These functions must be defined by each front-end which implements
830 a variant of the C language. They are used by port files. */
832 extern tree default_conversion (tree);
834 /* Given two integer or real types, return the type for their sum.
835 Given two compatible ANSI C types, returns the merged type. */
837 extern tree common_type (tree, tree);
839 extern tree decl_constant_value (tree);
841 /* Handle increment and decrement of boolean types. */
842 extern tree boolean_increment (enum tree_code, tree);
844 extern int case_compare (splay_tree_key, splay_tree_key);
846 extern tree c_add_case_label (splay_tree, tree, tree, tree, tree);
848 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
850 extern tree build_function_call (tree, tree);
852 extern tree resolve_overloaded_builtin (tree, tree);
854 extern tree finish_label_address_expr (tree);
856 /* Same function prototype, but the C and C++ front ends have
857 different implementations. Used in c-common.c. */
858 extern tree lookup_label (tree);
859 extern tree lookup_name (tree);
861 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
862 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
864 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
866 extern tree c_staticp (tree);
868 extern void init_c_lex (void);
870 extern void c_cpp_builtins (cpp_reader *);
872 /* Positive if an implicit `extern "C"' scope has just been entered;
873 negative if such a scope has just been exited. */
874 extern GTY(()) int pending_lang_change;
876 /* Information recorded about each file examined during compilation. */
880 int time; /* Time spent in the file. */
882 /* Flags used only by C++.
883 INTERFACE_ONLY nonzero means that we are in an "interface" section
884 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust
885 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and
886 INTERFACE_ONLY is zero, it means that we are responsible for
887 exporting definitions that others might need. */
888 short interface_only;
889 short interface_unknown;
892 struct c_fileinfo *get_fileinfo (const char *);
893 extern void dump_time_statistics (void);
895 extern bool c_dump_tree (void *, tree);
897 extern void c_warn_unused_result (tree *);
899 extern void verify_sequence_points (tree);
901 extern tree fold_offsetof (tree, tree);
903 /* Places where an lvalue, or modifiable lvalue, may be required.
904 Used to select diagnostic messages in lvalue_error and
914 extern void lvalue_error (enum lvalue_use);
916 extern int complete_array_type (tree *, tree, bool);
918 extern tree builtin_type_for_size (int, bool);
920 extern void warn_array_subscript_with_type_char (tree);
921 extern void warn_about_parentheses (enum tree_code, enum tree_code,
923 extern void warn_for_unused_label (tree label);
924 extern void warn_for_div_by_zero (tree divisor);
927 /* In c-gimplify.c */
928 extern void c_genericize (tree);
929 extern int c_gimplify_expr (tree *, tree *, tree *);
930 extern tree c_build_bind_expr (tree, tree);
933 extern void pch_init (void);
934 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
935 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
937 extern void c_common_write_pch (void);
938 extern void c_common_no_more_pch (void);
939 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
940 extern void c_common_print_pch_checksum (FILE *f);
942 /* In *-checksum.c */
943 extern const unsigned char executable_checksum[16];
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);
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 int objc_is_reserved_word (tree);
958 extern bool objc_compare_types (tree, tree, int, tree);
959 extern void objc_volatilize_decl (tree);
960 extern bool objc_type_quals_match (tree, tree);
961 extern tree objc_rewrite_function_call (tree, tree);
962 extern tree objc_message_selector (void);
963 extern tree objc_lookup_ivar (tree, tree);
964 extern void objc_clear_super_receiver (void);
965 extern int objc_is_public (tree, tree);
966 extern tree objc_is_id (tree);
967 extern void objc_declare_alias (tree, tree);
968 extern void objc_declare_class (tree);
969 extern void objc_declare_protocols (tree);
970 extern tree objc_build_message_expr (tree);
971 extern tree objc_finish_message_expr (tree, tree, tree);
972 extern tree objc_build_selector_expr (tree);
973 extern tree objc_build_protocol_expr (tree);
974 extern tree objc_build_encode_expr (tree);
975 extern tree objc_build_string_object (tree);
976 extern tree objc_get_protocol_qualified_type (tree, tree);
977 extern tree objc_get_class_reference (tree);
978 extern tree objc_get_class_ivars (tree);
979 extern void objc_start_class_interface (tree, tree, tree);
980 extern void objc_start_category_interface (tree, tree, tree);
981 extern void objc_start_protocol (tree, tree);
982 extern void objc_continue_interface (void);
983 extern void objc_finish_interface (void);
984 extern void objc_start_class_implementation (tree, tree);
985 extern void objc_start_category_implementation (tree, tree);
986 extern void objc_continue_implementation (void);
987 extern void objc_finish_implementation (void);
988 extern void objc_set_visibility (int);
989 extern void objc_set_method_type (enum tree_code);
990 extern tree objc_build_method_signature (tree, tree, tree, bool);
991 extern void objc_add_method_declaration (tree);
992 extern void objc_start_method_definition (tree);
993 extern void objc_finish_method_definition (tree);
994 extern void objc_add_instance_variable (tree);
995 extern tree objc_build_keyword_decl (tree, tree, tree);
996 extern tree objc_build_throw_stmt (tree);
997 extern void objc_begin_try_stmt (location_t, tree);
998 extern tree objc_finish_try_stmt (void);
999 extern void objc_begin_catch_clause (tree);
1000 extern void objc_finish_catch_clause (void);
1001 extern void objc_build_finally_clause (location_t, tree);
1002 extern tree objc_build_synchronized (location_t, tree, tree);
1003 extern int objc_static_init_needed_p (void);
1004 extern tree objc_generate_static_init_call (tree);
1005 extern tree objc_generate_write_barrier (tree, enum tree_code, tree);
1007 /* The following are provided by the C and C++ front-ends, and called by
1009 extern void *objc_get_current_scope (void);
1010 extern void objc_mark_locals_volatile (void *);
1012 /* In c-ppoutput.c */
1013 extern void init_pp_output (FILE *);
1014 extern void preprocess_file (cpp_reader *);
1015 extern void pp_file_change (const struct line_map *);
1016 extern void pp_dir_change (cpp_reader *, const char *);
1017 extern bool check_missing_format_attribute (tree, tree);
1020 extern tree c_finish_omp_master (tree);
1021 extern tree c_finish_omp_critical (tree, tree);
1022 extern tree c_finish_omp_ordered (tree);
1023 extern void c_finish_omp_barrier (void);
1024 extern tree c_finish_omp_atomic (enum tree_code, tree, tree);
1025 extern void c_finish_omp_flush (void);
1026 extern void c_finish_omp_taskwait (void);
1027 extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree);
1028 extern void c_split_parallel_clauses (tree, tree *, tree *);
1029 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1031 /* Not in c-omp.c; provided by the front end. */
1032 extern bool c_omp_sharing_predetermined (tree);
1033 extern tree c_omp_remap_decl (tree, bool);
1035 /* In order for the format checking to accept the C frontend
1036 diagnostic framework extensions, you must include this file before
1037 toplev.h, not after. The C front end formats are a subset of those
1038 for C++, so they are the appropriate set to use in common code;
1039 cp-tree.h overrides this for C++. */
1040 #ifndef GCC_DIAG_STYLE
1041 #define GCC_DIAG_STYLE __gcc_cdiag__
1044 #endif /* ! GCC_C_COMMON_H */