1 /* Definitions for c-common.c.
2 Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003 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 2, 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 COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
22 #ifndef GCC_C_COMMON_H
23 #define GCC_C_COMMON_H
25 #include "splay-tree.h"
29 /* Usage of TREE_LANG_FLAG_?:
30 0: COMPOUND_STMT_NO_SCOPE (in COMPOUND_STMT).
31 TREE_NEGATED_INT (in INTEGER_CST).
32 IDENTIFIER_MARKED (used by search routines).
33 SCOPE_BEGIN_P (in SCOPE_STMT)
34 DECL_PRETTY_FUNCTION_P (in VAR_DECL)
35 NEW_FOR_SCOPE_P (in FOR_STMT)
36 ASM_INPUT_P (in ASM_STMT)
37 STMT_EXPR_NO_SCOPE (in STMT_EXPR)
38 1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
39 STMT_IS_FULL_EXPR_P (in _STMT)
40 2: STMT_LINENO_FOR_FN_P (in _STMT)
41 3: SCOPE_NO_CLEANUPS_P (in SCOPE_STMT)
42 COMPOUND_STMT_BODY_BLOCK (in COMPOUND_STMT)
43 4: SCOPE_PARTIAL_P (in SCOPE_STMT)
46 /* Reserved identifiers. This is the union of all the keywords for C,
47 C++, and Objective-C. All the type modifiers have to be in one
48 block at the beginning, because they are used as mask bits. There
49 are 27 type modifiers; if we add many more we will have to redesign
50 the mask mechanism. */
55 /* C, in empirical order of frequency. */
57 RID_UNSIGNED, RID_LONG, RID_CONST, RID_EXTERN,
58 RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
59 RID_VOLATILE, RID_SIGNED, RID_AUTO, RID_RESTRICT,
62 RID_COMPLEX, RID_THREAD,
65 RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
68 RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
71 RID_INT, RID_CHAR, RID_FLOAT, RID_DOUBLE, RID_VOID,
72 RID_ENUM, RID_STRUCT, RID_UNION, RID_IF, RID_ELSE,
73 RID_WHILE, RID_DO, RID_FOR, RID_SWITCH, RID_CASE,
74 RID_DEFAULT, RID_BREAK, RID_CONTINUE, RID_RETURN, RID_GOTO,
78 RID_ASM, RID_TYPEOF, RID_ALIGNOF, RID_ATTRIBUTE, RID_VA_ARG,
79 RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL, RID_PTRBASE,
80 RID_PTREXTENT, RID_PTRVALUE, RID_CHOOSE_EXPR, RID_TYPES_COMPATIBLE_P,
82 /* Too many ways of getting the name of a function as a string */
83 RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
86 RID_BOOL, RID_WCHAR, RID_CLASS,
87 RID_PUBLIC, RID_PRIVATE, RID_PROTECTED,
88 RID_TEMPLATE, RID_NULL, RID_CATCH,
89 RID_DELETE, RID_FALSE, RID_NAMESPACE,
90 RID_NEW, RID_OPERATOR, RID_THIS,
91 RID_THROW, RID_TRUE, RID_TRY,
92 RID_TYPENAME, RID_TYPEID, RID_USING,
95 RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
98 RID_ID, RID_AT_ENCODE, RID_AT_END,
99 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS,
100 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC,
101 RID_AT_PROTOCOL, RID_AT_SELECTOR, RID_AT_INTERFACE,
102 RID_AT_IMPLEMENTATION,
106 RID_FIRST_MODIFIER = RID_STATIC,
107 RID_LAST_MODIFIER = RID_ONEWAY,
109 RID_FIRST_AT = RID_AT_ENCODE,
110 RID_LAST_AT = RID_AT_IMPLEMENTATION,
111 RID_FIRST_PQ = RID_IN,
112 RID_LAST_PQ = RID_ONEWAY
115 #define OBJC_IS_AT_KEYWORD(rid) \
116 ((unsigned int)(rid) >= (unsigned int)RID_FIRST_AT && \
117 (unsigned int)(rid) <= (unsigned int)RID_LAST_AT)
119 #define OBJC_IS_PQ_KEYWORD(rid) \
120 ((unsigned int)(rid) >= (unsigned int)RID_FIRST_PQ && \
121 (unsigned int)(rid) <= (unsigned int)RID_LAST_PQ)
123 /* The elements of `ridpointers' are identifier nodes for the reserved
124 type names and storage classes. It is indexed by a RID_... value. */
125 extern GTY ((length ("(int)RID_MAX"))) tree *ridpointers;
127 /* Standard named or nameless data types of the C compiler. */
132 CTI_SIGNED_WCHAR_TYPE,
133 CTI_UNSIGNED_WCHAR_TYPE,
135 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
136 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
139 CTI_WIDEST_INT_LIT_TYPE,
140 CTI_WIDEST_UINT_LIT_TYPE,
143 CTI_WCHAR_ARRAY_TYPE,
146 CTI_CONST_STRING_TYPE,
148 /* Type for boolean expressions (bool in C++, int in C). */
151 CTI_TRUTHVALUE_FALSE,
153 CTI_DEFAULT_FUNCTION_TYPE,
155 CTI_G77_INTEGER_TYPE,
156 CTI_G77_UINTEGER_TYPE,
157 CTI_G77_LONGINT_TYPE,
158 CTI_G77_ULONGINT_TYPE,
160 /* These are not types, but we have to look them up all the time. */
161 CTI_FUNCTION_NAME_DECL,
162 CTI_PRETTY_FUNCTION_NAME_DECL,
163 CTI_C99_FUNCTION_NAME_DECL,
164 CTI_SAVED_FUNCTION_NAME_DECLS,
171 #define C_RID_CODE(id) (((struct c_common_identifier *) (id))->node.rid_code)
173 /* Identifier part common to the C front ends. Inherits from
174 tree_identifier, despite appearances. */
175 struct c_common_identifier GTY(())
177 struct tree_common common;
178 struct cpp_hashnode node;
181 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
182 #define signed_wchar_type_node c_global_trees[CTI_SIGNED_WCHAR_TYPE]
183 #define unsigned_wchar_type_node c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
184 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
185 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
186 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
187 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
188 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
189 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
190 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
192 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
193 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
194 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
196 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
197 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
198 #define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
199 #define string_type_node c_global_trees[CTI_STRING_TYPE]
200 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
202 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
204 /* g77 integer types, which which must be kept in sync with f/com.h */
205 #define g77_integer_type_node c_global_trees[CTI_G77_INTEGER_TYPE]
206 #define g77_uinteger_type_node c_global_trees[CTI_G77_UINTEGER_TYPE]
207 #define g77_longint_type_node c_global_trees[CTI_G77_LONGINT_TYPE]
208 #define g77_ulongint_type_node c_global_trees[CTI_G77_ULONGINT_TYPE]
210 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
211 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
212 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
213 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
215 /* A node for `((void) 0)'. */
216 #define void_zero_node c_global_trees[CTI_VOID_ZERO]
218 extern GTY(()) tree c_global_trees[CTI_MAX];
220 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a tree for size reasons. */
221 struct sorted_fields_type GTY(())
224 tree GTY((length ("%h.len"))) elts[1];
227 /* Mark which labels are explicitly declared.
228 These may be shadowed, and may be referenced from nested functions. */
229 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
231 /* Flag strings given by __FUNCTION__ and __PRETTY_FUNCTION__ for a
232 warning if they undergo concatenation. */
233 #define C_ARTIFICIAL_STRING_P(NODE) TREE_LANG_FLAG_0 (NODE)
235 typedef enum c_language_kind
237 clk_c = 0, /* C90, C94 or C99 */
238 clk_objc = 1, /* clk_c with ObjC features. */
239 clk_cxx = 2, /* ANSI/ISO C++ */
240 clk_objcxx = 3 /* clk_cxx with ObjC features. */
244 /* To test for a specific language use c_language, defined by each
245 front end. For "ObjC features" or "not C++" use the macros. */
246 extern c_language_kind c_language;
248 #define c_dialect_cxx() (c_language & clk_cxx)
249 #define c_dialect_objc() (c_language & clk_objc)
251 /* Information about a statement tree. */
253 struct stmt_tree_s GTY(()) {
254 /* The last statement added to the tree. */
256 /* The type of the last expression statement. (This information is
257 needed to implement the statement-expression extension.) */
258 tree x_last_expr_type;
259 /* The last filename we recorded. */
260 const char *x_last_expr_filename;
261 /* In C++, Nonzero if we should treat statements as full
262 expressions. In particular, this variable is no-zero if at the
263 end of a statement we should destroy any temporaries created
264 during that statement. Similarly, if, at the end of a block, we
265 should destroy any local variables in this block. Normally, this
266 variable is nonzero, since those are the normal semantics of
269 However, in order to represent aggregate initialization code as
270 tree structure, we use statement-expressions. The statements
271 within the statement expression should not result in cleanups
272 being run until the entire enclosing statement is complete.
274 This flag has no effect in C. */
275 int stmts_are_full_exprs_p;
278 typedef struct stmt_tree_s *stmt_tree;
280 /* Global state pertinent to the current function. Some C dialects
281 extend this structure with additional fields. */
283 struct c_language_function GTY(()) {
284 /* While we are parsing the function, this contains information
285 about the statement-tree that we are building. */
286 struct stmt_tree_s x_stmt_tree;
287 /* The stack of SCOPE_STMTs for the current function. */
288 tree x_scope_stmt_stack;
291 /* When building a statement-tree, this is the last statement added to
294 #define last_tree (current_stmt_tree ()->x_last_stmt)
296 /* The type of the last expression-statement we have seen. */
298 #define last_expr_type (current_stmt_tree ()->x_last_expr_type)
300 /* The name of the last file we have seen. */
302 #define last_expr_filename (current_stmt_tree ()->x_last_expr_filename)
304 /* LAST_TREE contains the last statement parsed. These are chained
305 together through the TREE_CHAIN field, but often need to be
306 re-organized since the parse is performed bottom-up. This macro
307 makes LAST_TREE the indicated SUBSTMT of STMT. */
309 #define RECHAIN_STMTS(stmt, substmt) \
311 substmt = TREE_CHAIN (stmt); \
312 TREE_CHAIN (stmt) = NULL_TREE; \
316 /* Language-specific hooks. */
318 extern void (*lang_expand_stmt) (tree);
319 extern void (*lang_expand_decl_stmt) (tree);
320 extern void (*lang_expand_function_end) (void);
322 /* Callback that determines if it's ok for a function to have no
323 noreturn attribute. */
324 extern int (*lang_missing_noreturn_ok_p) (tree);
326 extern int yyparse (void);
327 extern void free_parser_stacks (void);
329 extern stmt_tree current_stmt_tree (void);
330 extern tree *current_scope_stmt_stack (void);
331 extern void begin_stmt_tree (tree *);
332 extern tree add_stmt (tree);
333 extern void add_decl_stmt (tree);
334 extern tree add_scope_stmt (int, int);
335 extern void finish_stmt_tree (tree *);
337 extern tree walk_stmt_tree (tree *, walk_tree_fn, void *);
338 extern void prep_stmt (tree);
339 extern void expand_stmt (tree);
340 extern tree c_begin_if_stmt (void);
341 extern tree c_begin_while_stmt (void);
342 extern void c_finish_while_stmt_cond (tree, tree);
344 enum sw_kind { SW_PARAM = 0, SW_LOCAL, SW_GLOBAL };
345 extern void shadow_warning (enum sw_kind, const char *, tree);
346 extern int field_decl_cmp (const void *, const void *);
347 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
350 /* Switches common to the C front ends. */
352 /* Nonzero if prepreprocessing only. */
354 extern int flag_preprocess_only;
356 /* Nonzero means don't output line number information. */
358 extern char flag_no_line_commands;
360 /* Nonzero causes -E output not to be done, but directives such as
361 #define that have side effects are still obeyed. */
363 extern char flag_no_output;
365 /* Nonzero means dump macros in some fashion; contains the 'D', 'M' or
366 'N' of the command line switch. */
368 extern char flag_dump_macros;
370 /* Nonzero means pass #include lines through to the output. */
372 extern char flag_dump_includes;
374 /* The file name to which we should write a precompiled header, or
375 NULL if no header will be written in this compile. */
377 extern const char *pch_file;
379 /* Nonzero if an ISO standard was selected. It rejects macros in the
384 /* Nonzero if -undef was given. It suppresses target built-in macros
387 extern int flag_undef;
389 /* Nonzero means don't recognize the non-ANSI builtin functions. */
391 extern int flag_no_builtin;
393 /* Nonzero means don't recognize the non-ANSI builtin functions.
396 extern int flag_no_nonansi_builtin;
398 /* Nonzero means give `double' the same size as `float'. */
400 extern int flag_short_double;
402 /* Nonzero means give `wchar_t' the same size as `short'. */
404 extern int flag_short_wchar;
406 /* Nonzero means allow Microsoft extensions without warnings or errors. */
407 extern int flag_ms_extensions;
409 /* Nonzero means don't recognize the keyword `asm'. */
411 extern int flag_no_asm;
413 /* Nonzero means give string constants the type `const char *', as mandated
416 extern int flag_const_strings;
418 /* Nonzero means to treat bitfields as signed unless they say `unsigned'. */
420 extern int flag_signed_bitfields;
421 extern int explicit_flag_signed_bitfields;
423 /* Nonzero means warn about pointer casts that can drop a type qualifier
424 from the pointer target type. */
426 extern int warn_cast_qual;
428 /* Warn about functions which might be candidates for format attributes. */
430 extern int warn_missing_format_attribute;
432 /* Nonzero means warn about sizeof(function) or addition/subtraction
433 of function pointers. */
435 extern int warn_pointer_arith;
437 /* Nonzero means warn for any global function def
438 without separate previous prototype decl. */
440 extern int warn_missing_prototypes;
442 /* Warn if adding () is suggested. */
444 extern int warn_parentheses;
446 /* Warn if initializer is not completely bracketed. */
448 extern int warn_missing_braces;
450 /* Warn about comparison of signed and unsigned values.
451 If -1, neither -Wsign-compare nor -Wno-sign-compare has been specified. */
453 extern int warn_sign_compare;
455 /* Nonzero means warn about usage of long long when `-pedantic'. */
457 extern int warn_long_long;
459 /* Nonzero means warn about deprecated conversion from string constant to
462 extern int warn_write_strings;
464 /* Nonzero means warn about multiple (redundant) decls for the same single
465 variable or function. */
467 extern int warn_redundant_decls;
469 /* Warn about testing equality of floating point numbers. */
471 extern int warn_float_equal;
473 /* Warn about a subscript that has type char. */
475 extern int warn_char_subscripts;
477 /* Warn if a type conversion is done that might have confusing results. */
479 extern int warn_conversion;
481 /* Warn about #pragma directives that are not recognized. */
483 extern int warn_unknown_pragmas; /* Tri state variable. */
485 /* Warn about format/argument anomalies in calls to formatted I/O functions
486 (*printf, *scanf, strftime, strfmon, etc.). */
488 extern int warn_format;
490 /* Warn about Y2K problems with strftime formats. */
492 extern int warn_format_y2k;
494 /* Warn about excess arguments to formats. */
496 extern int warn_format_extra_args;
498 /* Warn about zero-length formats. */
500 extern int warn_format_zero_length;
502 /* Warn about non-literal format arguments. */
504 extern int warn_format_nonliteral;
506 /* Warn about possible security problems with calls to format functions. */
508 extern int warn_format_security;
511 /* C/ObjC language option variables. */
514 /* Nonzero means message about use of implicit function declarations;
515 1 means warning; 2 means error. */
517 extern int mesg_implicit_function_declaration;
519 /* Nonzero means allow type mismatches in conditional expressions;
520 just make their values `void'. */
522 extern int flag_cond_mismatch;
524 /* Nonzero means enable C89 Amendment 1 features. */
526 extern int flag_isoc94;
528 /* Nonzero means use the ISO C99 dialect of C. */
530 extern int flag_isoc99;
532 /* Nonzero means that we have builtin functions, and main is an int */
534 extern int flag_hosted;
536 /* Nonzero means warn when casting a function call to a type that does
537 not match the return type (e.g. (float)sqrt() or (anything*)malloc()
538 when there is no previous declaration of sqrt or malloc. */
540 extern int warn_bad_function_cast;
542 /* Warn about traditional constructs whose meanings changed in ANSI C. */
544 extern int warn_traditional;
546 /* Nonzero means warn for a declaration found after a statement. */
548 extern int warn_declaration_after_statement;
550 /* Nonzero means warn for non-prototype function decls
551 or non-prototyped defs without previous prototype. */
553 extern int warn_strict_prototypes;
555 /* Nonzero means warn for any global function def
556 without separate previous decl. */
558 extern int warn_missing_declarations;
560 /* Nonzero means warn about extern declarations of objects not at
561 file-scope level and about *all* declarations of functions (whether
562 extern or static) not at file-scope level. Note that we exclude
563 implicit function declarations. To get warnings about those, use
566 extern int warn_nested_externs;
568 /* Warn if main is suspicious. */
570 extern int warn_main;
572 /* Nonzero means warn about possible violations of sequence point rules. */
574 extern int warn_sequence_point;
576 /* Nonzero means warn about uninitialized variable when it is initialized with itself.
577 For example: int i = i;, GCC will not warn about this when warn_init_self is nonzero. */
579 extern int warn_init_self;
582 /* Nonzero means to warn about compile-time division by zero. */
583 extern int warn_div_by_zero;
585 /* Nonzero means warn about use of implicit int. */
587 extern int warn_implicit_int;
589 /* Warn about NULL being passed to argument slots marked as requiring
592 extern int warn_nonnull;
594 /* Warn about old-style parameter declaration. */
596 extern int warn_old_style_definition;
599 /* ObjC language option variables. */
602 /* Open and close the file for outputting class declarations, if
605 extern int flag_gen_declaration;
607 /* Generate code for GNU or NeXT runtime environment. */
609 extern int flag_next_runtime;
611 /* Tells the compiler that this is a special run. Do not perform any
612 compiling, instead we are to test some platform dependent features
613 and output a C header file with appropriate definitions. */
615 extern int print_struct_values;
617 /* ???. Undocumented. */
619 extern const char *constant_string_class_name;
621 /* Warn if multiple methods are seen for the same selector, but with
622 different argument types. Performs the check on the whole selector
623 table at the end of compilation. */
625 extern int warn_selector;
627 /* Warn if a @selector() is found, and no method with that selector
628 has been previously declared. The check is done on each
629 @selector() as soon as it is found - so it warns about forward
632 extern int warn_undeclared_selector;
634 /* Warn if methods required by a protocol are not implemented in the
635 class adopting it. When turned off, methods inherited to that
636 class are also considered implemented. */
638 extern int warn_protocol;
641 /* C++ language option variables. */
644 /* Nonzero means don't recognize any extension keywords. */
646 extern int flag_no_gnu_keywords;
648 /* Nonzero means do emit exported implementations of functions even if
649 they can be inlined. */
651 extern int flag_implement_inlines;
653 /* Nonzero means do emit exported implementations of templates, instead of
654 multiple static copies in each file that needs a definition. */
656 extern int flag_external_templates;
658 /* Nonzero means that the decision to emit or not emit the implementation of a
659 template depends on where the template is instantiated, rather than where
662 extern int flag_alt_external_templates;
664 /* Nonzero means that implicit instantiations will be emitted if needed. */
666 extern int flag_implicit_templates;
668 /* Nonzero means that implicit instantiations of inline templates will be
669 emitted if needed, even if instantiations of non-inline templates
672 extern int flag_implicit_inline_templates;
674 /* Nonzero means generate separate instantiation control files and
675 juggle them at link time. */
677 extern int flag_use_repository;
679 /* Nonzero if we want to issue diagnostics that the standard says are not
682 extern int flag_optional_diags;
684 /* Nonzero means we should attempt to elide constructors when possible. */
686 extern int flag_elide_constructors;
688 /* Nonzero means that member functions defined in class scope are
689 inline by default. */
691 extern int flag_default_inline;
693 /* Controls whether compiler generates 'type descriptor' that give
694 run-time type information. */
696 extern int flag_rtti;
698 /* Nonzero if we want to conserve space in the .o files. We do this
699 by putting uninitialized data and runtime initialized data into
700 .common instead of .data at the expense of not flagging multiple
703 extern int flag_conserve_space;
705 /* Nonzero if we want to obey access control semantics. */
707 extern int flag_access_control;
709 /* Nonzero if we want to check the return value of new and avoid calling
710 constructors if it is a null pointer. */
712 extern int flag_check_new;
714 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
715 initialization variables.
716 0: Old rules, set by -fno-for-scope.
717 2: New ISO rules, set by -ffor-scope.
718 1: Try to implement new ISO rules, but with backup compatibility
719 (and warnings). This is the default, for now. */
721 extern int flag_new_for_scope;
723 /* Nonzero if we want to emit defined symbols with common-like linkage as
724 weak symbols where possible, in order to conform to C++ semantics.
725 Otherwise, emit them as local symbols. */
727 extern int flag_weak;
729 /* 0 means we want the preprocessor to not emit line directives for
730 the current working directory. 1 means we want it to do it. -1
731 means we should decide depending on whether debugging information
732 is being emitted or not. */
734 extern int flag_working_directory;
736 /* Nonzero to use __cxa_atexit, rather than atexit, to register
737 destructors for local statics and global objects. */
739 extern int flag_use_cxa_atexit;
741 /* Nonzero means make the default pedwarns warnings instead of errors.
742 The value of this flag is ignored if -pedantic is specified. */
744 extern int flag_permissive;
746 /* Nonzero means to implement standard semantics for exception
747 specifications, calling unexpected if an exception is thrown that
748 doesn't match the specification. Zero means to treat them as
749 assertions and optimize accordingly, but not check them. */
751 extern int flag_enforce_eh_specs;
753 /* The version of the C++ ABI in use. The following values are
756 0: The version of the ABI believed most conformant with the
757 C++ ABI specification. This ABI may change as bugs are
758 discovered and fixed. Therefore, 0 will not necessarily
759 indicate the same ABI in different versions of G++.
761 1: The version of the ABI first used in G++ 3.2.
763 Additional positive integers will be assigned as new versions of
764 the ABI become the default version of the ABI. */
766 extern int flag_abi_version;
768 /* Nonzero means warn about things that will change when compiling
769 with an ABI-compliant compiler. */
773 /* Nonzero means warn about invalid uses of offsetof. */
775 extern int warn_invalid_offsetof;
777 /* Nonzero means warn about implicit declarations. */
779 extern int warn_implicit;
781 /* Nonzero means warn when all ctors or dtors are private, and the class
784 extern int warn_ctor_dtor_privacy;
786 /* Nonzero means warn in function declared in derived class has the
787 same name as a virtual in the base class, but fails to match the
788 type signature of any virtual function in the base class. */
790 extern int warn_overloaded_virtual;
792 /* Nonzero means warn when declaring a class that has a non virtual
793 destructor, when it really ought to have a virtual one. */
795 extern int warn_nonvdtor;
797 /* Nonzero means warn when the compiler will reorder code. */
799 extern int warn_reorder;
801 /* Nonzero means warn when synthesis behavior differs from Cfront's. */
803 extern int warn_synth;
805 /* Nonzero means warn when we convert a pointer to member function
806 into a pointer to (void or function). */
808 extern int warn_pmf2ptr;
810 /* Nonzero means warn about violation of some Effective C++ style rules. */
812 extern int warn_ecpp;
814 /* Nonzero means warn where overload resolution chooses a promotion from
815 unsigned to signed over a conversion to an unsigned of the same size. */
817 extern int warn_sign_promo;
819 /* Nonzero means warn when an old-style cast is used. */
821 extern int warn_old_style_cast;
823 /* Nonzero means warn when non-templatized friend functions are
824 declared within a template */
826 extern int warn_nontemplate_friend;
828 /* Nonzero means complain about deprecated features. */
830 extern int warn_deprecated;
832 /* Maximum template instantiation depth. This limit is rather
833 arbitrary, but it exists to limit the time it takes to notice
834 infinite template instantiations. */
836 extern int max_tinst_depth;
838 /* Nonzero means the expression being parsed will never be evaluated.
839 This is a count, since unevaluated expressions can nest. */
841 extern int skip_evaluation;
843 /* C types are partitioned into three subsets: object, function, and
845 #define C_TYPE_OBJECT_P(type) \
846 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
848 #define C_TYPE_INCOMPLETE_P(type) \
849 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
851 #define C_TYPE_FUNCTION_P(type) \
852 (TREE_CODE (type) == FUNCTION_TYPE)
854 /* For convenience we define a single macro to identify the class of
855 object or incomplete types. */
856 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
857 (!C_TYPE_FUNCTION_P (type))
859 /* Record in each node resulting from a binary operator
860 what operator was specified for it. */
861 #define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp))
863 /* Attribute table common to the C front ends. */
864 extern const struct attribute_spec c_common_attribute_table[];
865 extern const struct attribute_spec c_common_format_attribute_table[];
867 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
868 ID is the identifier to use, NAME is the string.
869 TYPE_DEP indicates whether it depends on type of the function or not
870 (i.e. __PRETTY_FUNCTION__). */
872 extern tree (*make_fname_decl) (tree, int);
874 extern tree identifier_global_value (tree);
875 extern void record_builtin_type (enum rid, const char *, tree);
876 extern tree build_void_list_node (void);
877 extern void start_fname_decls (void);
878 extern void finish_fname_decls (void);
879 extern const char *fname_as_string (int);
880 extern tree fname_decl (unsigned, tree);
882 extern void check_function_arguments (tree, tree);
883 extern void check_function_arguments_recurse (void (*)
885 unsigned HOST_WIDE_INT),
887 unsigned HOST_WIDE_INT);
888 extern void check_function_format (int *, tree, tree);
889 extern void set_Wformat (int);
890 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
891 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
892 extern int c_common_handle_option (size_t code, const char *arg, int value);
893 extern bool c_common_missing_argument (const char *opt, size_t code);
894 extern tree c_common_type_for_mode (enum machine_mode, int);
895 extern tree c_common_type_for_size (unsigned int, int);
896 extern tree c_common_unsigned_type (tree);
897 extern tree c_common_signed_type (tree);
898 extern tree c_common_signed_or_unsigned_type (int, tree);
899 extern tree c_common_truthvalue_conversion (tree);
900 extern void c_apply_type_quals_to_decl (int, tree);
901 extern tree c_sizeof_or_alignof_type (tree, enum tree_code, int);
902 extern tree c_alignof_expr (tree);
903 /* Print an error message for invalid operands to arith operation CODE.
904 NOP_EXPR is used as a special case (see truthvalue_conversion). */
905 extern void binary_op_error (enum tree_code);
906 #define my_friendly_assert(EXP, N) (void) \
907 (((EXP) == 0) ? (fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0) : 0)
909 extern tree c_expand_expr_stmt (tree);
910 extern void c_expand_start_cond (tree, int, tree);
911 extern void c_finish_then (void);
912 extern void c_expand_start_else (void);
913 extern void c_finish_else (void);
914 extern void c_expand_end_cond (void);
915 /* Validate the expression after `case' and apply default promotions. */
916 extern tree check_case_value (tree);
917 extern tree fix_string_type (tree);
918 struct varray_head_tag;
919 extern void constant_expression_warning (tree);
920 extern tree convert_and_check (tree, tree);
921 extern void overflow_warning (tree);
922 extern void unsigned_conversion_warning (tree, tree);
924 /* Read the rest of the current #-directive line. */
925 extern char *get_directive_line (void);
926 #define GET_DIRECTIVE_LINE() get_directive_line ()
927 #define c_sizeof(T) c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 1)
928 #define c_alignof(T) c_sizeof_or_alignof_type (T, ALIGNOF_EXPR, 1)
930 /* Subroutine of build_binary_op, used for comparison operations.
931 See if the operands have both been converted from subword integer types
932 and, if so, perhaps change them both back to their original type. */
933 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
935 extern tree pointer_int_sum (enum tree_code, tree, tree);
936 extern unsigned int min_precision (tree, int);
938 /* Add qualifiers to a type, in the fashion for C. */
939 extern tree c_build_qualified_type (tree, int);
941 /* Build tree nodes and builtin functions common to both C and C++ language
943 extern void c_common_nodes_and_builtins (void);
945 extern void disable_builtin_function (const char *);
947 extern tree build_va_arg (tree, tree);
949 extern unsigned int c_common_init_options (unsigned int, const char **);
950 extern bool c_common_post_options (const char **);
951 extern bool c_common_init (void);
952 extern void c_common_finish (void);
953 extern void c_common_parse_file (int);
954 extern HOST_WIDE_INT c_common_get_alias_set (tree);
955 extern void c_register_builtin_type (tree, const char*);
956 extern bool c_promoting_integer_type_p (tree);
957 extern int self_promoting_args_p (tree);
958 extern tree strip_array_types (tree);
959 extern tree strip_pointer_operator (tree);
961 /* This function resets the parsers' state in preparation for parsing
963 extern void c_reset_state (void);
964 /* This is the basic parsing function. */
965 extern void c_parse_file (void);
966 /* This is misnamed, it actually performs end-of-compilation processing. */
967 extern void finish_file (void);
969 /* These macros provide convenient access to the various _STMT nodes. */
971 /* Nonzero if this statement should be considered a full-expression,
972 i.e., if temporaries created during this statement should have
973 their destructors run at the end of this statement. (In C, this
974 will always be false, since there are no destructors.) */
975 #define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
977 /* IF_STMT accessors. These give access to the condition of the if
978 statement, the then block of the if statement, and the else block
979 of the if statement if it exists. */
980 #define IF_COND(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 0)
981 #define THEN_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 1)
982 #define ELSE_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 2)
984 /* WHILE_STMT accessors. These give access to the condition of the
985 while statement and the body of the while statement, respectively. */
986 #define WHILE_COND(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
987 #define WHILE_BODY(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
989 /* DO_STMT accessors. These give access to the condition of the do
990 statement and the body of the do statement, respectively. */
991 #define DO_COND(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
992 #define DO_BODY(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
994 /* RETURN_STMT accessors. These give the expression associated with a
995 return statement, and whether it should be ignored when expanding
996 (as opposed to inlining). */
997 #define RETURN_STMT_EXPR(NODE) TREE_OPERAND (RETURN_STMT_CHECK (NODE), 0)
999 /* EXPR_STMT accessor. This gives the expression associated with an
1000 expression statement. */
1001 #define EXPR_STMT_EXPR(NODE) TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
1003 /* FOR_STMT accessors. These give access to the init statement,
1004 condition, update expression, and body of the for statement,
1006 #define FOR_INIT_STMT(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
1007 #define FOR_COND(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
1008 #define FOR_EXPR(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
1009 #define FOR_BODY(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
1011 /* SWITCH_STMT accessors. These give access to the condition, body and
1012 original condition type (before any compiler conversions)
1013 of the switch statement, respectively. */
1014 #define SWITCH_COND(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 0)
1015 #define SWITCH_BODY(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 1)
1016 #define SWITCH_TYPE(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 2)
1018 /* CASE_LABEL accessors. These give access to the high and low values
1019 of a case label, respectively. */
1020 #define CASE_LOW(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 0)
1021 #define CASE_HIGH(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 1)
1022 #define CASE_LABEL_DECL(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 2)
1024 /* GOTO_STMT accessor. This gives access to the label associated with
1025 a goto statement. */
1026 #define GOTO_DESTINATION(NODE) TREE_OPERAND (GOTO_STMT_CHECK (NODE), 0)
1027 /* True for goto created artificially by the compiler. */
1028 #define GOTO_FAKE_P(NODE) (TREE_LANG_FLAG_0 (GOTO_STMT_CHECK (NODE)))
1030 /* COMPOUND_STMT accessor. This gives access to the TREE_LIST of
1031 statements associated with a compound statement. The result is the
1032 first statement in the list. Succeeding nodes can be accessed by
1033 calling TREE_CHAIN on a node in the list. */
1034 #define COMPOUND_BODY(NODE) TREE_OPERAND (COMPOUND_STMT_CHECK (NODE), 0)
1036 /* ASM_STMT accessors. ASM_STRING returns a STRING_CST for the
1037 instruction (e.g., "mov x, y"). ASM_OUTPUTS, ASM_INPUTS, and
1038 ASM_CLOBBERS represent the outputs, inputs, and clobbers for the
1040 #define ASM_CV_QUAL(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 0)
1041 #define ASM_STRING(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 1)
1042 #define ASM_OUTPUTS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 2)
1043 #define ASM_INPUTS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 3)
1044 #define ASM_CLOBBERS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 4)
1046 /* DECL_STMT accessor. This gives access to the DECL associated with
1047 the given declaration statement. */
1048 #define DECL_STMT_DECL(NODE) TREE_OPERAND (DECL_STMT_CHECK (NODE), 0)
1050 /* STMT_EXPR accessor. */
1051 #define STMT_EXPR_STMT(NODE) TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
1053 /* Nonzero if this statement-expression does not have an associated scope. */
1054 #define STMT_EXPR_NO_SCOPE(NODE) \
1055 TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))
1057 /* LABEL_STMT accessor. This gives access to the label associated with
1058 the given label statement. */
1059 #define LABEL_STMT_LABEL(NODE) TREE_OPERAND (LABEL_STMT_CHECK (NODE), 0)
1061 /* COMPOUND_LITERAL_EXPR accessors. */
1062 #define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \
1063 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
1064 #define COMPOUND_LITERAL_EXPR_DECL(NODE) \
1065 DECL_STMT_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
1067 /* Nonzero if this SCOPE_STMT is for the beginning of a scope. */
1068 #define SCOPE_BEGIN_P(NODE) \
1069 (TREE_LANG_FLAG_0 (SCOPE_STMT_CHECK (NODE)))
1071 /* Nonzero if this SCOPE_STMT is for the end of a scope. */
1072 #define SCOPE_END_P(NODE) \
1073 (!SCOPE_BEGIN_P (SCOPE_STMT_CHECK (NODE)))
1075 /* The BLOCK containing the declarations contained in this scope. */
1076 #define SCOPE_STMT_BLOCK(NODE) \
1077 (TREE_OPERAND (SCOPE_STMT_CHECK (NODE), 0))
1079 /* Nonzero for a SCOPE_STMT if there were no variables in this scope. */
1080 #define SCOPE_NULLIFIED_P(NODE) \
1081 (SCOPE_STMT_BLOCK ((NODE)) == NULL_TREE)
1083 /* Nonzero for a SCOPE_STMT which represents a lexical scope, but
1084 which should be treated as non-existent from the point of view of
1085 running cleanup actions. */
1086 #define SCOPE_NO_CLEANUPS_P(NODE) \
1087 (TREE_LANG_FLAG_3 (SCOPE_STMT_CHECK (NODE)))
1089 /* Nonzero for a SCOPE_STMT if this statement is for a partial scope.
1097 there is (implicitly) a new scope after `l', even though there are
1098 no curly braces. In particular, when we hit the goto, we must
1099 destroy s2 and then re-construct it. For the implicit scope,
1100 SCOPE_PARTIAL_P will be set. */
1101 #define SCOPE_PARTIAL_P(NODE) \
1102 (TREE_LANG_FLAG_4 (SCOPE_STMT_CHECK (NODE)))
1104 /* Nonzero for an ASM_STMT if the assembly statement is volatile. */
1105 #define ASM_VOLATILE_P(NODE) \
1106 (ASM_CV_QUAL (ASM_STMT_CHECK (NODE)) != NULL_TREE)
1108 /* The VAR_DECL to clean up in a CLEANUP_STMT. */
1109 #define CLEANUP_DECL(NODE) \
1110 TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 0)
1111 /* The cleanup to run in a CLEANUP_STMT. */
1112 #define CLEANUP_EXPR(NODE) \
1113 TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 1)
1115 /* The filename we are changing to as of this FILE_STMT. */
1116 #define FILE_STMT_FILENAME_NODE(NODE) \
1117 (TREE_OPERAND (FILE_STMT_CHECK (NODE), 0))
1118 #define FILE_STMT_FILENAME(NODE) \
1119 (IDENTIFIER_POINTER (FILE_STMT_FILENAME_NODE (NODE)))
1121 /* The line-number at which a statement began. But if
1122 STMT_LINENO_FOR_FN_P does holds, then this macro gives the
1123 line number for the end of the current function instead. */
1124 #define STMT_LINENO(NODE) \
1125 (TREE_COMPLEXITY ((NODE)))
1127 /* If nonzero, the STMT_LINENO for NODE is the line at which the
1129 #define STMT_LINENO_FOR_FN_P(NODE) \
1130 (TREE_LANG_FLAG_2 ((NODE)))
1132 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
1133 initialization variables. */
1134 #define NEW_FOR_SCOPE_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1136 /* Nonzero if we want to create an ASM_INPUT instead of an
1137 ASM_OPERAND with no operands. */
1138 #define ASM_INPUT_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1140 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
1143 C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
1144 #include "c-common.def"
1150 #define c_common_stmt_codes \
1151 CLEANUP_STMT, EXPR_STMT, COMPOUND_STMT, \
1152 DECL_STMT, IF_STMT, FOR_STMT, \
1153 WHILE_STMT, DO_STMT, RETURN_STMT, \
1154 BREAK_STMT, CONTINUE_STMT, SCOPE_STMT, \
1155 SWITCH_STMT, GOTO_STMT, LABEL_STMT, \
1156 ASM_STMT, FILE_STMT, CASE_LABEL
1158 /* TRUE if a code represents a statement. The front end init
1159 langhook should take care of initialization of this array. */
1160 extern bool statement_code_p[MAX_TREE_CODES];
1162 #define STATEMENT_CODE_P(CODE) statement_code_p[(int) (CODE)]
1164 #define INIT_STATEMENT_CODES(STMT_CODES) \
1167 memset (&statement_code_p, 0, sizeof (statement_code_p)); \
1168 for (i = 0; i < ARRAY_SIZE (STMT_CODES); i++) \
1169 statement_code_p[STMT_CODES[i]] = true; \
1172 extern void genrtl_do_pushlevel (void);
1173 extern void genrtl_goto_stmt (tree);
1174 extern void genrtl_expr_stmt (tree);
1175 extern void genrtl_expr_stmt_value (tree, int, int);
1176 extern void genrtl_decl_stmt (tree);
1177 extern void genrtl_if_stmt (tree);
1178 extern void genrtl_while_stmt (tree);
1179 extern void genrtl_do_stmt (tree);
1180 extern void genrtl_return_stmt (tree);
1181 extern void genrtl_for_stmt (tree);
1182 extern void genrtl_break_stmt (void);
1183 extern void genrtl_continue_stmt (void);
1184 extern void genrtl_scope_stmt (tree);
1185 extern void genrtl_switch_stmt (tree);
1186 extern void genrtl_case_label (tree);
1187 extern void genrtl_compound_stmt (tree);
1188 extern void genrtl_asm_stmt (tree, tree, tree, tree, tree, int);
1189 extern void genrtl_cleanup_stmt (tree);
1190 extern int stmts_are_full_exprs_p (void);
1191 extern int anon_aggr_type_p (tree);
1193 /* For a VAR_DECL that is an anonymous union, these are the various
1194 sub-variables that make up the anonymous union. */
1195 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
1197 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
1198 #define DECL_C_BIT_FIELD(NODE) \
1199 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
1200 #define SET_DECL_C_BIT_FIELD(NODE) \
1201 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
1202 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
1203 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
1205 /* In a VAR_DECL, nonzero if the decl is a register variable with
1206 an explicit asm specification. */
1207 #define DECL_C_HARD_REGISTER(DECL) DECL_LANG_FLAG_4 (VAR_DECL_CHECK (DECL))
1209 extern void emit_local_var (tree);
1210 extern void make_rtl_for_local_static (tree);
1211 extern tree expand_cond (tree);
1212 extern tree c_expand_return (tree);
1213 extern tree do_case (tree, tree);
1214 extern tree build_stmt (enum tree_code, ...);
1215 extern tree build_case_label (tree, tree, tree);
1216 extern tree build_continue_stmt (void);
1217 extern tree build_break_stmt (void);
1218 extern tree build_return_stmt (tree);
1220 #define COMPOUND_STMT_NO_SCOPE(NODE) TREE_LANG_FLAG_0 (NODE)
1222 /* Used by the C++ frontend to mark the block around the member
1223 initializers and cleanups. */
1224 #define COMPOUND_STMT_BODY_BLOCK(NODE) TREE_LANG_FLAG_3 (NODE)
1226 extern void c_expand_asm_operands (tree, tree, tree, tree, int, const char *, int);
1228 /* These functions must be defined by each front-end which implements
1229 a variant of the C language. They are used in c-common.c. */
1231 extern tree build_unary_op (enum tree_code, tree, int);
1232 extern tree build_binary_op (enum tree_code, tree, tree, int);
1233 extern int lvalue_p (tree);
1234 extern tree default_conversion (tree);
1236 /* Given two integer or real types, return the type for their sum.
1237 Given two compatible ANSI C types, returns the merged type. */
1239 extern tree common_type (tree, tree);
1241 extern tree expand_tree_builtin (tree, tree, tree);
1243 extern tree decl_constant_value (tree);
1245 /* Handle increment and decrement of boolean types. */
1246 extern tree boolean_increment (enum tree_code, tree);
1248 /* Hook currently used only by the C++ front end to reset internal state
1249 after entering or leaving a header file. */
1250 extern void extract_interface_info (void);
1252 extern int case_compare (splay_tree_key, splay_tree_key);
1254 extern tree c_add_case_label (splay_tree, tree, tree, tree);
1256 extern tree build_function_call (tree, tree);
1258 extern tree finish_label_address_expr (tree);
1260 /* Same function prototype, but the C and C++ front ends have
1261 different implementations. Used in c-common.c. */
1262 extern tree lookup_label (tree);
1264 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int);
1266 extern int c_safe_from_p (rtx, tree);
1268 extern int c_staticp (tree);
1270 extern int c_common_unsafe_for_reeval (tree);
1272 extern void init_c_lex (void);
1274 extern void c_cpp_builtins (cpp_reader *);
1276 /* Positive if an implicit `extern "C"' scope has just been entered;
1277 negative if such a scope has just been exited. */
1278 extern int pending_lang_change;
1280 /* Information recorded about each file examined during compilation. */
1284 int time; /* Time spent in the file. */
1285 short interface_only; /* Flags - used only by C++ */
1286 short interface_unknown;
1289 struct c_fileinfo *get_fileinfo (const char *);
1290 extern void dump_time_statistics (void);
1292 extern bool c_dump_tree (void *, tree);
1294 extern void pch_init (void);
1295 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1296 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1298 extern void c_common_write_pch (void);
1299 extern void c_common_no_more_pch (void);
1300 extern void builtin_define_with_value (const char *, const char *, int);
1301 extern void c_stddef_cpp_builtins (void);
1302 extern void fe_file_change (const struct line_map *);
1303 extern int c_estimate_num_insns (tree decl);
1304 extern bool c_decl_uninit (tree t);
1306 /* In c-ppoutput.c */
1307 extern void init_pp_output (FILE *);
1308 extern void preprocess_file (cpp_reader *);
1309 extern void pp_file_change (const struct line_map *);
1311 #endif /* ! GCC_C_COMMON_H */