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_CPP_HASHNODE(id) \
192 (&(((struct c_common_identifier *) (id))->node))
193 #define C_RID_CODE(id) \
194 ((enum rid) (((struct c_common_identifier *) (id))->node.rid_code))
195 #define C_SET_RID_CODE(id, code) \
196 (((struct c_common_identifier *) (id))->node.rid_code = (unsigned char) code)
198 /* Identifier part common to the C front ends. Inherits from
199 tree_identifier, despite appearances. */
200 struct c_common_identifier GTY(())
202 struct tree_common common;
203 struct cpp_hashnode node;
206 /* An entry in the reserved keyword table. */
208 struct c_common_resword
210 const char *const word;
211 ENUM_BITFIELD(rid) const rid : 16;
212 const unsigned int disable : 16;
215 /* Disable mask. Keywords are disabled if (reswords[i].disable &
216 mask) is _true_. Thus for keywords which are present in all
217 languages the disable field is zero. */
219 #define D_CONLY 0x001 /* C only (not in C++). */
220 #define D_CXXONLY 0x002 /* C++ only (not in C). */
221 #define D_C99 0x004 /* In C, C99 only. */
222 #define D_CXX0X 0x008 /* In C++, C++0X only. */
223 #define D_EXT 0x010 /* GCC extension. */
224 #define D_EXT89 0x020 /* GCC extension incorporated in C99. */
225 #define D_ASM 0x040 /* Disabled by -fno-asm. */
226 #define D_OBJC 0x080 /* In Objective C and neither C nor C++. */
227 #define D_CXX_OBJC 0x100 /* In Objective C, and C++, but not C. */
228 #define D_CXXWARN 0x200 /* In C warn with -Wcxx-compat. */
230 /* The reserved keyword table. */
231 extern const struct c_common_resword c_common_reswords[];
233 /* The number of items in the reserved keyword table. */
234 extern const unsigned int num_c_common_reswords;
236 #define char16_type_node c_global_trees[CTI_CHAR16_TYPE]
237 #define char32_type_node c_global_trees[CTI_CHAR32_TYPE]
238 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
239 #define signed_wchar_type_node c_global_trees[CTI_SIGNED_WCHAR_TYPE]
240 #define unsigned_wchar_type_node c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
241 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
242 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
243 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
244 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
245 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
246 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
247 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
249 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
250 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
251 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
253 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
254 #define char16_array_type_node c_global_trees[CTI_CHAR16_ARRAY_TYPE]
255 #define char32_array_type_node c_global_trees[CTI_CHAR32_ARRAY_TYPE]
256 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
257 #define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
258 #define string_type_node c_global_trees[CTI_STRING_TYPE]
259 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
261 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
263 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
264 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
265 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
266 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
268 /* A node for `((void) 0)'. */
269 #define void_zero_node c_global_trees[CTI_VOID_ZERO]
271 /* The node for C++ `__null'. */
272 #define null_node c_global_trees[CTI_NULL]
274 extern GTY(()) tree c_global_trees[CTI_MAX];
276 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
277 tree for size reasons. */
278 struct sorted_fields_type GTY(())
281 tree GTY((length ("%h.len"))) elts[1];
284 /* Mark which labels are explicitly declared.
285 These may be shadowed, and may be referenced from nested functions. */
286 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
288 typedef enum c_language_kind
290 clk_c = 0, /* C90, C94 or C99 */
291 clk_objc = 1, /* clk_c with ObjC features. */
292 clk_cxx = 2, /* ANSI/ISO C++ */
293 clk_objcxx = 3 /* clk_cxx with ObjC features. */
297 /* To test for a specific language use c_language, defined by each
298 front end. For "ObjC features" or "not C++" use the macros. */
299 extern c_language_kind c_language;
301 #define c_dialect_cxx() (c_language & clk_cxx)
302 #define c_dialect_objc() (c_language & clk_objc)
304 /* Information about a statement tree. */
306 struct stmt_tree_s GTY(()) {
307 /* The current statement list being collected. */
308 tree x_cur_stmt_list;
310 /* In C++, Nonzero if we should treat statements as full
311 expressions. In particular, this variable is no-zero if at the
312 end of a statement we should destroy any temporaries created
313 during that statement. Similarly, if, at the end of a block, we
314 should destroy any local variables in this block. Normally, this
315 variable is nonzero, since those are the normal semantics of
318 However, in order to represent aggregate initialization code as
319 tree structure, we use statement-expressions. The statements
320 within the statement expression should not result in cleanups
321 being run until the entire enclosing statement is complete.
323 This flag has no effect in C. */
324 int stmts_are_full_exprs_p;
327 typedef struct stmt_tree_s *stmt_tree;
329 /* Global state pertinent to the current function. Some C dialects
330 extend this structure with additional fields. */
332 struct c_language_function GTY(()) {
333 /* While we are parsing the function, this contains information
334 about the statement-tree that we are building. */
335 struct stmt_tree_s x_stmt_tree;
338 /* When building a statement-tree, this is the current statement list
339 being collected. It's TREE_CHAIN is a back-pointer to the previous
342 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
344 /* Language-specific hooks. */
346 /* If non-NULL, this function is called after a precompile header file
348 extern void (*lang_post_pch_load) (void);
350 extern void push_file_scope (void);
351 extern void pop_file_scope (void);
352 extern stmt_tree current_stmt_tree (void);
353 extern tree push_stmt_list (void);
354 extern tree pop_stmt_list (tree);
355 extern tree add_stmt (tree);
356 extern void push_cleanup (tree, tree, bool);
357 extern tree pushdecl_top_level (tree);
358 extern tree pushdecl (tree);
359 extern tree build_modify_expr (tree, enum tree_code, tree);
360 extern tree build_indirect_ref (tree, const char *);
362 extern int c_expand_decl (tree);
364 extern int field_decl_cmp (const void *, const void *);
365 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
367 extern bool has_c_linkage (const_tree decl);
369 /* Switches common to the C front ends. */
371 /* Nonzero if prepreprocessing only. */
373 extern int flag_preprocess_only;
375 /* Zero means that faster, ...NonNil variants of objc_msgSend...
376 calls will be used in ObjC; passing nil receivers to such calls
377 will most likely result in crashes. */
378 extern int flag_nil_receivers;
380 /* Nonzero means that we will allow new ObjC exception syntax (@throw,
381 @try, etc.) in source code. */
382 extern int flag_objc_exceptions;
384 /* Nonzero means that we generate NeXT setjmp based exceptions. */
385 extern int flag_objc_sjlj_exceptions;
387 /* Nonzero means that code generation will be altered to support
388 "zero-link" execution. This currently affects ObjC only, but may
389 affect other languages in the future. */
390 extern int flag_zero_link;
392 /* Nonzero means emit an '__OBJC, __image_info' for the current translation
393 unit. It will inform the ObjC runtime that class definition(s) herein
394 contained are to replace one(s) previously loaded. */
395 extern int flag_replace_objc_classes;
397 /* Nonzero means don't output line number information. */
399 extern char flag_no_line_commands;
401 /* Nonzero causes -E output not to be done, but directives such as
402 #define that have side effects are still obeyed. */
404 extern char flag_no_output;
406 /* Nonzero means dump macros in some fashion; contains the 'D', 'M',
407 'N' or 'U' of the command line switch. */
409 extern char flag_dump_macros;
411 /* Nonzero means pass #include lines through to the output. */
413 extern char flag_dump_includes;
415 /* Nonzero means process PCH files while preprocessing. */
417 extern bool flag_pch_preprocess;
419 /* The file name to which we should write a precompiled header, or
420 NULL if no header will be written in this compile. */
422 extern const char *pch_file;
424 /* Nonzero if an ISO standard was selected. It rejects macros in the
429 /* Nonzero if -undef was given. It suppresses target built-in macros
432 extern int flag_undef;
434 /* Nonzero means don't recognize the non-ANSI builtin functions. */
436 extern int flag_no_builtin;
438 /* Nonzero means don't recognize the non-ANSI builtin functions.
441 extern int flag_no_nonansi_builtin;
443 /* Nonzero means give `double' the same size as `float'. */
445 extern int flag_short_double;
447 /* Nonzero means give `wchar_t' the same size as `short'. */
449 extern int flag_short_wchar;
451 /* Nonzero means allow implicit conversions between vectors with
452 differing numbers of subparts and/or differing element types. */
453 extern int flag_lax_vector_conversions;
455 /* Nonzero means allow Microsoft extensions without warnings or errors. */
456 extern int flag_ms_extensions;
458 /* Nonzero means don't recognize the keyword `asm'. */
460 extern int flag_no_asm;
462 /* Nonzero means give string constants the type `const char *', as mandated
465 extern int flag_const_strings;
467 /* Nonzero means to treat bitfields as signed unless they say `unsigned'. */
469 extern int flag_signed_bitfields;
471 /* Warn about #pragma directives that are not recognized. */
473 extern int warn_unknown_pragmas; /* Tri state variable. */
475 /* Warn about format/argument anomalies in calls to formatted I/O functions
476 (*printf, *scanf, strftime, strfmon, etc.). */
478 extern int warn_format;
481 /* C/ObjC language option variables. */
484 /* Nonzero means allow type mismatches in conditional expressions;
485 just make their values `void'. */
487 extern int flag_cond_mismatch;
489 /* Nonzero means enable C89 Amendment 1 features. */
491 extern int flag_isoc94;
493 /* Nonzero means use the ISO C99 dialect of C. */
495 extern int flag_isoc99;
497 /* Nonzero means that we have builtin functions, and main is an int. */
499 extern int flag_hosted;
501 /* Warn if main is suspicious. */
503 extern int warn_main;
506 /* ObjC language option variables. */
509 /* Open and close the file for outputting class declarations, if
512 extern int flag_gen_declaration;
514 /* Tells the compiler that this is a special run. Do not perform any
515 compiling, instead we are to test some platform dependent features
516 and output a C header file with appropriate definitions. */
518 extern int print_struct_values;
520 /* ???. Undocumented. */
522 extern const char *constant_string_class_name;
525 /* C++ language option variables. */
528 /* Nonzero means don't recognize any extension keywords. */
530 extern int flag_no_gnu_keywords;
532 /* Nonzero means do emit exported implementations of functions even if
533 they can be inlined. */
535 extern int flag_implement_inlines;
537 /* Nonzero means that implicit instantiations will be emitted if needed. */
539 extern int flag_implicit_templates;
541 /* Nonzero means that implicit instantiations of inline templates will be
542 emitted if needed, even if instantiations of non-inline templates
545 extern int flag_implicit_inline_templates;
547 /* Nonzero means generate separate instantiation control files and
548 juggle them at link time. */
550 extern int flag_use_repository;
552 /* Nonzero if we want to issue diagnostics that the standard says are not
555 extern int flag_optional_diags;
557 /* Nonzero means we should attempt to elide constructors when possible. */
559 extern int flag_elide_constructors;
561 /* Nonzero means that member functions defined in class scope are
562 inline by default. */
564 extern int flag_default_inline;
566 /* Controls whether compiler generates 'type descriptor' that give
567 run-time type information. */
569 extern int flag_rtti;
571 /* Nonzero if we want to conserve space in the .o files. We do this
572 by putting uninitialized data and runtime initialized data into
573 .common instead of .data at the expense of not flagging multiple
576 extern int flag_conserve_space;
578 /* Nonzero if we want to obey access control semantics. */
580 extern int flag_access_control;
582 /* Nonzero if we want to check the return value of new and avoid calling
583 constructors if it is a null pointer. */
585 extern int flag_check_new;
587 /* The supported C++ dialects. */
592 /* Experimental features that are likely to become part of
597 /* The C++ dialect being used. C++98 is the default. */
598 extern enum cxx_dialect cxx_dialect;
600 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
601 initialization variables.
602 0: Old rules, set by -fno-for-scope.
603 2: New ISO rules, set by -ffor-scope.
604 1: Try to implement new ISO rules, but with backup compatibility
605 (and warnings). This is the default, for now. */
607 extern int flag_new_for_scope;
609 /* Nonzero if we want to emit defined symbols with common-like linkage as
610 weak symbols where possible, in order to conform to C++ semantics.
611 Otherwise, emit them as local symbols. */
613 extern int flag_weak;
615 /* 0 means we want the preprocessor to not emit line directives for
616 the current working directory. 1 means we want it to do it. -1
617 means we should decide depending on whether debugging information
618 is being emitted or not. */
620 extern int flag_working_directory;
622 /* Nonzero to use __cxa_atexit, rather than atexit, to register
623 destructors for local statics and global objects. */
625 extern int flag_use_cxa_atexit;
627 /* Nonzero to use __cxa_get_exception_ptr in the C++ exception-handling
630 extern int flag_use_cxa_get_exception_ptr;
632 /* Nonzero means to implement standard semantics for exception
633 specifications, calling unexpected if an exception is thrown that
634 doesn't match the specification. Zero means to treat them as
635 assertions and optimize accordingly, but not check them. */
637 extern int flag_enforce_eh_specs;
639 /* Nonzero (the default) means to generate thread-safe code for
640 initializing local statics. */
642 extern int flag_threadsafe_statics;
644 /* Nonzero means warn about implicit declarations. */
646 extern int warn_implicit;
648 /* Warn about using __null (as NULL in C++) as sentinel. For code compiled
649 with GCC this doesn't matter as __null is guaranteed to have the right
652 extern int warn_strict_null_sentinel;
654 /* Maximum template instantiation depth. This limit is rather
655 arbitrary, but it exists to limit the time it takes to notice
656 infinite template instantiations. */
658 extern int max_tinst_depth;
660 /* Nonzero means the expression being parsed will never be evaluated.
661 This is a count, since unevaluated expressions can nest. */
663 extern int skip_evaluation;
665 /* C types are partitioned into three subsets: object, function, and
667 #define C_TYPE_OBJECT_P(type) \
668 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
670 #define C_TYPE_INCOMPLETE_P(type) \
671 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
673 #define C_TYPE_FUNCTION_P(type) \
674 (TREE_CODE (type) == FUNCTION_TYPE)
676 /* For convenience we define a single macro to identify the class of
677 object or incomplete types. */
678 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
679 (!C_TYPE_FUNCTION_P (type))
681 /* Attribute table common to the C front ends. */
682 extern const struct attribute_spec c_common_attribute_table[];
683 extern const struct attribute_spec c_common_format_attribute_table[];
685 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
686 ID is the identifier to use, NAME is the string.
687 TYPE_DEP indicates whether it depends on type of the function or not
688 (i.e. __PRETTY_FUNCTION__). */
690 extern tree (*make_fname_decl) (tree, int);
692 extern tree identifier_global_value (tree);
693 extern void record_builtin_type (enum rid, const char *, tree);
694 extern tree build_void_list_node (void);
695 extern void start_fname_decls (void);
696 extern void finish_fname_decls (void);
697 extern const char *fname_as_string (int);
698 extern tree fname_decl (unsigned, tree);
700 extern void check_function_arguments (tree, int, tree *, tree);
701 extern void check_function_arguments_recurse (void (*)
703 unsigned HOST_WIDE_INT),
705 unsigned HOST_WIDE_INT);
706 extern bool check_builtin_function_arguments (tree, int, tree *);
707 extern void check_function_format (tree, int, tree *);
708 extern void set_Wformat (int);
709 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
710 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
711 extern int c_common_handle_option (size_t code, const char *arg, int value);
712 extern bool c_common_missing_argument (const char *opt, size_t code);
713 extern tree c_common_type_for_mode (enum machine_mode, int);
714 extern tree c_common_type_for_size (unsigned int, int);
715 extern tree c_common_fixed_point_type_for_size (unsigned int, unsigned int,
717 extern tree c_common_unsigned_type (tree);
718 extern tree c_common_signed_type (tree);
719 extern tree c_common_signed_or_unsigned_type (int, tree);
720 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
721 extern bool decl_with_nonnull_addr_p (const_tree);
722 extern tree c_common_truthvalue_conversion (tree);
723 extern void c_apply_type_quals_to_decl (int, tree);
724 extern tree c_sizeof_or_alignof_type (tree, bool, int);
725 extern tree c_alignof_expr (tree);
726 /* Print an error message for invalid operands to arith operation CODE.
727 NOP_EXPR is used as a special case (see truthvalue_conversion). */
728 extern void binary_op_error (enum tree_code, tree, tree);
729 extern tree fix_string_type (tree);
730 struct varray_head_tag;
731 extern void constant_expression_warning (tree);
732 extern void constant_expression_error (tree);
733 extern bool strict_aliasing_warning (tree, tree, tree);
734 extern void empty_if_body_warning (tree, tree);
735 extern void warnings_for_convert_and_check (tree, tree, tree);
736 extern tree convert_and_check (tree, tree);
737 extern void overflow_warning (tree);
738 extern void warn_logical_operator (enum tree_code, tree, tree);
739 extern void check_main_parameter_types (tree decl);
740 extern bool c_determine_visibility (tree);
741 extern bool same_scalar_type_ignoring_signedness (tree, tree);
743 #define c_sizeof(T) c_sizeof_or_alignof_type (T, true, 1)
744 #define c_alignof(T) c_sizeof_or_alignof_type (T, false, 1)
746 /* Subroutine of build_binary_op, used for certain operations. */
747 extern tree shorten_binary_op (tree result_type, tree op0, tree op1, bool bitwise);
749 /* Subroutine of build_binary_op, used for comparison operations.
750 See if the operands have both been converted from subword integer types
751 and, if so, perhaps change them both back to their original type. */
752 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
754 extern tree pointer_int_sum (enum tree_code, tree, tree);
755 extern unsigned int min_precision (tree, int);
757 /* Add qualifiers to a type, in the fashion for C. */
758 extern tree c_build_qualified_type (tree, int);
760 /* Build tree nodes and builtin functions common to both C and C++ language
762 extern void c_common_nodes_and_builtins (void);
764 extern void set_builtin_user_assembler_name (tree decl, const char *asmspec);
766 extern void disable_builtin_function (const char *);
768 extern void set_compound_literal_name (tree decl);
770 extern tree build_va_arg (tree, tree);
772 extern unsigned int c_common_init_options (unsigned int, const char **);
773 extern bool c_common_post_options (const char **);
774 extern bool c_common_init (void);
775 extern void c_common_finish (void);
776 extern void c_common_parse_file (int);
777 extern alias_set_type c_common_get_alias_set (tree);
778 extern void c_register_builtin_type (tree, const char*);
779 extern bool c_promoting_integer_type_p (const_tree);
780 extern int self_promoting_args_p (const_tree);
781 extern tree strip_pointer_operator (tree);
782 extern tree strip_pointer_or_array_types (tree);
783 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
785 /* This is the basic parsing function. */
786 extern void c_parse_file (void);
787 /* This is misnamed, it actually performs end-of-compilation processing. */
788 extern void finish_file (void);
791 /* These macros provide convenient access to the various _STMT nodes. */
793 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
794 if a statement expression. */
795 #define STATEMENT_LIST_STMT_EXPR(NODE) \
796 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
798 /* Nonzero if a label has been added to the statement list. */
799 #define STATEMENT_LIST_HAS_LABEL(NODE) \
800 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
802 /* COMPOUND_LITERAL_EXPR accessors. */
803 #define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \
804 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
805 #define COMPOUND_LITERAL_EXPR_DECL(NODE) \
806 DECL_EXPR_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
808 extern int anon_aggr_type_p (const_tree);
810 /* For a VAR_DECL that is an anonymous union, these are the various
811 sub-variables that make up the anonymous union. */
812 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
814 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
815 #define DECL_C_BIT_FIELD(NODE) \
816 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
817 #define SET_DECL_C_BIT_FIELD(NODE) \
818 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
819 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
820 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
822 extern void emit_local_var (tree);
823 extern tree do_case (tree, tree);
824 extern tree build_stmt (enum tree_code, ...);
825 extern tree build_case_label (tree, tree, tree);
827 /* These functions must be defined by each front-end which implements
828 a variant of the C language. They are used in c-common.c. */
830 extern tree build_unary_op (enum tree_code, tree, int);
831 extern tree build_binary_op (enum tree_code, tree, tree, int);
832 extern tree perform_integral_promotions (tree);
834 /* These functions must be defined by each front-end which implements
835 a variant of the C language. They are used by port files. */
837 extern tree default_conversion (tree);
839 /* Given two integer or real types, return the type for their sum.
840 Given two compatible ANSI C types, returns the merged type. */
842 extern tree common_type (tree, tree);
844 extern tree decl_constant_value (tree);
846 /* Handle increment and decrement of boolean types. */
847 extern tree boolean_increment (enum tree_code, tree);
849 extern int case_compare (splay_tree_key, splay_tree_key);
851 extern tree c_add_case_label (splay_tree, tree, tree, tree, tree);
853 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
855 extern tree build_function_call (tree, tree);
857 extern tree resolve_overloaded_builtin (tree, tree);
859 extern tree finish_label_address_expr (tree);
861 /* Same function prototype, but the C and C++ front ends have
862 different implementations. Used in c-common.c. */
863 extern tree lookup_label (tree);
864 extern tree lookup_name (tree);
866 extern bool vector_targets_convertible_p (const_tree t1, const_tree t2);
867 extern bool vector_types_convertible_p (const_tree t1, const_tree t2, bool emit_lax_note);
869 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
871 extern tree c_staticp (tree);
873 extern void init_c_lex (void);
875 extern void c_cpp_builtins (cpp_reader *);
876 extern void c_cpp_builtins_optimize_pragma (cpp_reader *, tree, tree);
878 /* Positive if an implicit `extern "C"' scope has just been entered;
879 negative if such a scope has just been exited. */
880 extern GTY(()) int pending_lang_change;
882 /* Information recorded about each file examined during compilation. */
886 int time; /* Time spent in the file. */
888 /* Flags used only by C++.
889 INTERFACE_ONLY nonzero means that we are in an "interface" section
890 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust
891 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and
892 INTERFACE_ONLY is zero, it means that we are responsible for
893 exporting definitions that others might need. */
894 short interface_only;
895 short interface_unknown;
898 struct c_fileinfo *get_fileinfo (const char *);
899 extern void dump_time_statistics (void);
901 extern bool c_dump_tree (void *, tree);
903 extern void c_warn_unused_result (gimple_seq);
905 extern void verify_sequence_points (tree);
907 extern tree fold_offsetof (tree, tree);
909 /* Places where an lvalue, or modifiable lvalue, may be required.
910 Used to select diagnostic messages in lvalue_error and
920 extern void lvalue_error (enum lvalue_use);
922 extern int complete_array_type (tree *, tree, bool);
924 extern tree builtin_type_for_size (int, bool);
926 extern void warn_array_subscript_with_type_char (tree);
927 extern void warn_about_parentheses (enum tree_code, enum tree_code,
929 extern void warn_for_unused_label (tree label);
930 extern void warn_for_div_by_zero (tree divisor);
931 extern void warn_for_sign_compare (tree orig_op0, tree orig_op1,
934 enum tree_code resultcode);
936 /* In c-gimplify.c */
937 extern void c_genericize (tree);
938 extern int c_gimplify_expr (tree *, gimple_seq *, gimple_seq *);
939 extern tree c_build_bind_expr (tree, tree);
942 extern void pch_init (void);
943 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
944 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
946 extern void c_common_write_pch (void);
947 extern void c_common_no_more_pch (void);
948 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
949 extern void c_common_print_pch_checksum (FILE *f);
951 /* In *-checksum.c */
952 extern const unsigned char executable_checksum[16];
954 /* In c-cppbuiltin.c */
955 extern void builtin_define_std (const char *macro);
956 extern void builtin_define_with_value (const char *, const char *, int);
957 extern void c_stddef_cpp_builtins (void);
958 extern void fe_file_change (const struct line_map *);
959 extern void c_parse_error (const char *, enum cpp_ttype, tree);
961 /* Objective-C / Objective-C++ entry points. */
963 /* The following ObjC/ObjC++ functions are called by the C and/or C++
964 front-ends; they all must have corresponding stubs in stub-objc.c. */
965 extern tree objc_is_class_name (tree);
966 extern tree objc_is_object_ptr (tree);
967 extern void objc_check_decl (tree);
968 extern int objc_is_reserved_word (tree);
969 extern bool objc_compare_types (tree, tree, int, tree);
970 extern void objc_volatilize_decl (tree);
971 extern bool objc_type_quals_match (tree, tree);
972 extern tree objc_rewrite_function_call (tree, tree);
973 extern tree objc_message_selector (void);
974 extern tree objc_lookup_ivar (tree, tree);
975 extern void objc_clear_super_receiver (void);
976 extern int objc_is_public (tree, tree);
977 extern tree objc_is_id (tree);
978 extern void objc_declare_alias (tree, tree);
979 extern void objc_declare_class (tree);
980 extern void objc_declare_protocols (tree);
981 extern tree objc_build_message_expr (tree);
982 extern tree objc_finish_message_expr (tree, tree, tree);
983 extern tree objc_build_selector_expr (tree);
984 extern tree objc_build_protocol_expr (tree);
985 extern tree objc_build_encode_expr (tree);
986 extern tree objc_build_string_object (tree);
987 extern tree objc_get_protocol_qualified_type (tree, tree);
988 extern tree objc_get_class_reference (tree);
989 extern tree objc_get_class_ivars (tree);
990 extern void objc_start_class_interface (tree, tree, tree);
991 extern void objc_start_category_interface (tree, tree, tree);
992 extern void objc_start_protocol (tree, tree);
993 extern void objc_continue_interface (void);
994 extern void objc_finish_interface (void);
995 extern void objc_start_class_implementation (tree, tree);
996 extern void objc_start_category_implementation (tree, tree);
997 extern void objc_continue_implementation (void);
998 extern void objc_finish_implementation (void);
999 extern void objc_set_visibility (int);
1000 extern void objc_set_method_type (enum tree_code);
1001 extern tree objc_build_method_signature (tree, tree, tree, bool);
1002 extern void objc_add_method_declaration (tree);
1003 extern void objc_start_method_definition (tree);
1004 extern void objc_finish_method_definition (tree);
1005 extern void objc_add_instance_variable (tree);
1006 extern tree objc_build_keyword_decl (tree, tree, tree);
1007 extern tree objc_build_throw_stmt (tree);
1008 extern void objc_begin_try_stmt (location_t, tree);
1009 extern tree objc_finish_try_stmt (void);
1010 extern void objc_begin_catch_clause (tree);
1011 extern void objc_finish_catch_clause (void);
1012 extern void objc_build_finally_clause (location_t, tree);
1013 extern tree objc_build_synchronized (location_t, tree, tree);
1014 extern int objc_static_init_needed_p (void);
1015 extern tree objc_generate_static_init_call (tree);
1016 extern tree objc_generate_write_barrier (tree, enum tree_code, tree);
1018 /* The following are provided by the C and C++ front-ends, and called by
1020 extern void *objc_get_current_scope (void);
1021 extern void objc_mark_locals_volatile (void *);
1023 /* In c-ppoutput.c */
1024 extern void init_pp_output (FILE *);
1025 extern void preprocess_file (cpp_reader *);
1026 extern void pp_file_change (const struct line_map *);
1027 extern void pp_dir_change (cpp_reader *, const char *);
1028 extern bool check_missing_format_attribute (tree, tree);
1031 extern tree c_finish_omp_master (tree);
1032 extern tree c_finish_omp_critical (tree, tree);
1033 extern tree c_finish_omp_ordered (tree);
1034 extern void c_finish_omp_barrier (void);
1035 extern tree c_finish_omp_atomic (enum tree_code, tree, tree);
1036 extern void c_finish_omp_flush (void);
1037 extern void c_finish_omp_taskwait (void);
1038 extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree);
1039 extern void c_split_parallel_clauses (tree, tree *, tree *);
1040 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
1042 /* Not in c-omp.c; provided by the front end. */
1043 extern bool c_omp_sharing_predetermined (tree);
1044 extern tree c_omp_remap_decl (tree, bool);
1046 /* In order for the format checking to accept the C frontend
1047 diagnostic framework extensions, you must include this file before
1048 toplev.h, not after. The C front end formats are a subset of those
1049 for C++, so they are the appropriate set to use in common code;
1050 cp-tree.h overrides this for C++. */
1051 #ifndef GCC_DIAG_STYLE
1052 #define GCC_DIAG_STYLE __gcc_cdiag__
1055 #endif /* ! GCC_C_COMMON_H */