1 /* Definitions for c-common.c.
2 Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004 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 STMT_EXPR_WARN_UNUSED_RESULT (in STMT_EXPR)
44 4: SCOPE_PARTIAL_P (in SCOPE_STMT)
47 /* Reserved identifiers. This is the union of all the keywords for C,
48 C++, and Objective-C. All the type modifiers have to be in one
49 block at the beginning, because they are used as mask bits. There
50 are 27 type modifiers; if we add many more we will have to redesign
51 the mask mechanism. */
56 /* C, in empirical order of frequency. */
58 RID_UNSIGNED, RID_LONG, RID_CONST, RID_EXTERN,
59 RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
60 RID_VOLATILE, RID_SIGNED, RID_AUTO, RID_RESTRICT,
63 RID_COMPLEX, RID_THREAD,
66 RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
69 RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
72 RID_INT, RID_CHAR, RID_FLOAT, RID_DOUBLE, RID_VOID,
73 RID_ENUM, RID_STRUCT, RID_UNION, RID_IF, RID_ELSE,
74 RID_WHILE, RID_DO, RID_FOR, RID_SWITCH, RID_CASE,
75 RID_DEFAULT, RID_BREAK, RID_CONTINUE, RID_RETURN, RID_GOTO,
79 RID_ASM, RID_TYPEOF, RID_ALIGNOF, RID_ATTRIBUTE, RID_VA_ARG,
80 RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL, RID_PTRBASE,
81 RID_PTREXTENT, RID_PTRVALUE, RID_CHOOSE_EXPR, RID_TYPES_COMPATIBLE_P,
83 /* Too many ways of getting the name of a function as a string */
84 RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
87 RID_BOOL, RID_WCHAR, RID_CLASS,
88 RID_PUBLIC, RID_PRIVATE, RID_PROTECTED,
89 RID_TEMPLATE, RID_NULL, RID_CATCH,
90 RID_DELETE, RID_FALSE, RID_NAMESPACE,
91 RID_NEW, RID_OFFSETOF, RID_OPERATOR,
92 RID_THIS, RID_THROW, RID_TRUE,
93 RID_TRY, RID_TYPENAME, RID_TYPEID,
97 RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
100 RID_ID, RID_AT_ENCODE, RID_AT_END,
101 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS,
102 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC,
103 RID_AT_PROTOCOL, RID_AT_SELECTOR,
104 RID_AT_THROW, RID_AT_TRY, RID_AT_CATCH,
105 RID_AT_FINALLY, RID_AT_SYNCHRONIZED,
107 RID_AT_IMPLEMENTATION,
111 RID_FIRST_MODIFIER = RID_STATIC,
112 RID_LAST_MODIFIER = RID_ONEWAY,
114 RID_FIRST_AT = RID_AT_ENCODE,
115 RID_LAST_AT = RID_AT_IMPLEMENTATION,
116 RID_FIRST_PQ = RID_IN,
117 RID_LAST_PQ = RID_ONEWAY
120 #define OBJC_IS_AT_KEYWORD(rid) \
121 ((unsigned int)(rid) >= (unsigned int)RID_FIRST_AT && \
122 (unsigned int)(rid) <= (unsigned int)RID_LAST_AT)
124 #define OBJC_IS_PQ_KEYWORD(rid) \
125 ((unsigned int)(rid) >= (unsigned int)RID_FIRST_PQ && \
126 (unsigned int)(rid) <= (unsigned int)RID_LAST_PQ)
128 /* The elements of `ridpointers' are identifier nodes for the reserved
129 type names and storage classes. It is indexed by a RID_... value. */
130 extern GTY ((length ("(int)RID_MAX"))) tree *ridpointers;
132 /* Standard named or nameless data types of the C compiler. */
137 CTI_SIGNED_WCHAR_TYPE,
138 CTI_UNSIGNED_WCHAR_TYPE,
140 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
141 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
144 CTI_WIDEST_INT_LIT_TYPE,
145 CTI_WIDEST_UINT_LIT_TYPE,
148 CTI_WCHAR_ARRAY_TYPE,
151 CTI_CONST_STRING_TYPE,
153 /* Type for boolean expressions (bool in C++, int in C). */
156 CTI_TRUTHVALUE_FALSE,
158 CTI_DEFAULT_FUNCTION_TYPE,
160 CTI_G77_INTEGER_TYPE,
161 CTI_G77_UINTEGER_TYPE,
162 CTI_G77_LONGINT_TYPE,
163 CTI_G77_ULONGINT_TYPE,
165 /* These are not types, but we have to look them up all the time. */
166 CTI_FUNCTION_NAME_DECL,
167 CTI_PRETTY_FUNCTION_NAME_DECL,
168 CTI_C99_FUNCTION_NAME_DECL,
169 CTI_SAVED_FUNCTION_NAME_DECLS,
176 #define C_RID_CODE(id) (((struct c_common_identifier *) (id))->node.rid_code)
178 /* Identifier part common to the C front ends. Inherits from
179 tree_identifier, despite appearances. */
180 struct c_common_identifier GTY(())
182 struct tree_common common;
183 struct cpp_hashnode node;
186 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
187 #define signed_wchar_type_node c_global_trees[CTI_SIGNED_WCHAR_TYPE]
188 #define unsigned_wchar_type_node c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
189 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
190 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
191 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
192 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
193 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
194 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
195 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
197 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
198 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
199 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
201 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
202 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
203 #define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
204 #define string_type_node c_global_trees[CTI_STRING_TYPE]
205 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
207 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
209 /* g77 integer types, which must be kept in sync with f/com.h */
210 #define g77_integer_type_node c_global_trees[CTI_G77_INTEGER_TYPE]
211 #define g77_uinteger_type_node c_global_trees[CTI_G77_UINTEGER_TYPE]
212 #define g77_longint_type_node c_global_trees[CTI_G77_LONGINT_TYPE]
213 #define g77_ulongint_type_node c_global_trees[CTI_G77_ULONGINT_TYPE]
215 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
216 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
217 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
218 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
220 /* A node for `((void) 0)'. */
221 #define void_zero_node c_global_trees[CTI_VOID_ZERO]
223 extern GTY(()) tree c_global_trees[CTI_MAX];
225 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
226 tree for size reasons. */
227 struct sorted_fields_type GTY(())
230 tree GTY((length ("%h.len"))) elts[1];
233 /* Mark which labels are explicitly declared.
234 These may be shadowed, and may be referenced from nested functions. */
235 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
237 /* Flag strings given by __FUNCTION__ and __PRETTY_FUNCTION__ for a
238 warning if they undergo concatenation. */
239 #define C_ARTIFICIAL_STRING_P(NODE) TREE_LANG_FLAG_0 (NODE)
241 typedef enum c_language_kind
243 clk_c = 0, /* C90, C94 or C99 */
244 clk_objc = 1, /* clk_c with ObjC features. */
245 clk_cxx = 2, /* ANSI/ISO C++ */
246 clk_objcxx = 3 /* clk_cxx with ObjC features. */
250 /* To test for a specific language use c_language, defined by each
251 front end. For "ObjC features" or "not C++" use the macros. */
252 extern c_language_kind c_language;
254 #define c_dialect_cxx() (c_language & clk_cxx)
255 #define c_dialect_objc() (c_language & clk_objc)
257 /* Information about a statement tree. */
259 struct stmt_tree_s GTY(()) {
260 /* The last statement added to the tree. */
262 /* The type of the last expression statement. (This information is
263 needed to implement the statement-expression extension.) */
264 tree x_last_expr_type;
265 /* The last filename we recorded. */
266 const char *x_last_expr_filename;
267 /* In C++, Nonzero if we should treat statements as full
268 expressions. In particular, this variable is no-zero if at the
269 end of a statement we should destroy any temporaries created
270 during that statement. Similarly, if, at the end of a block, we
271 should destroy any local variables in this block. Normally, this
272 variable is nonzero, since those are the normal semantics of
275 However, in order to represent aggregate initialization code as
276 tree structure, we use statement-expressions. The statements
277 within the statement expression should not result in cleanups
278 being run until the entire enclosing statement is complete.
280 This flag has no effect in C. */
281 int stmts_are_full_exprs_p;
284 typedef struct stmt_tree_s *stmt_tree;
286 /* Global state pertinent to the current function. Some C dialects
287 extend this structure with additional fields. */
289 struct c_language_function GTY(()) {
290 /* While we are parsing the function, this contains information
291 about the statement-tree that we are building. */
292 struct stmt_tree_s x_stmt_tree;
293 /* The stack of SCOPE_STMTs for the current function. */
294 tree x_scope_stmt_stack;
297 /* When building a statement-tree, this is the last statement added to
300 #define last_tree (current_stmt_tree ()->x_last_stmt)
302 /* The type of the last expression-statement we have seen. */
304 #define last_expr_type (current_stmt_tree ()->x_last_expr_type)
306 /* The name of the last file we have seen. */
308 #define last_expr_filename (current_stmt_tree ()->x_last_expr_filename)
310 /* LAST_TREE contains the last statement parsed. These are chained
311 together through the TREE_CHAIN field, but often need to be
312 re-organized since the parse is performed bottom-up. This macro
313 makes LAST_TREE the indicated SUBSTMT of STMT. */
315 #define RECHAIN_STMTS(stmt, substmt) \
317 substmt = TREE_CHAIN (stmt); \
318 TREE_CHAIN (stmt) = NULL_TREE; \
322 /* Language-specific hooks. */
324 extern void (*lang_expand_stmt) (tree);
325 extern void (*lang_expand_decl_stmt) (tree);
326 extern void (*lang_expand_function_end) (void);
328 /* Callback that determines if it's ok for a function to have no
329 noreturn attribute. */
330 extern int (*lang_missing_noreturn_ok_p) (tree);
332 extern int yyparse (void);
333 extern stmt_tree current_stmt_tree (void);
334 extern tree *current_scope_stmt_stack (void);
335 extern void begin_stmt_tree (tree *);
336 extern tree add_stmt (tree);
337 extern void add_decl_stmt (tree);
338 extern tree add_scope_stmt (int, int);
339 extern void finish_stmt_tree (tree *);
341 extern tree walk_stmt_tree (tree *, walk_tree_fn, void *);
342 extern void prep_stmt (tree);
343 extern void expand_stmt (tree);
344 extern tree c_begin_if_stmt (void);
345 extern tree c_begin_while_stmt (void);
346 extern void c_finish_while_stmt_cond (tree, tree);
348 extern int field_decl_cmp (const void *, const void *);
349 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
352 /* Switches common to the C front ends. */
354 /* Nonzero if prepreprocessing only. */
356 extern int flag_preprocess_only;
358 /* Zero means that faster, ...NonNil variants of objc_msgSend...
359 calls will be used in ObjC; passing nil receivers to such calls
360 will most likely result in crashes. */
361 extern int flag_nil_receivers;
363 /* Nonzero means that we will allow new ObjC exception syntax (@throw,
364 @try, etc.) in source code. */
365 extern int flag_objc_exceptions;
367 /* Nonzero means that code generation will be altered to support
368 "zero-link" execution. This currently affects ObjC only, but may
369 affect other languages in the future. */
370 extern int flag_zero_link;
372 /* Nonzero means emit an '__OBJC, __image_info' for the current translation
373 unit. It will inform the ObjC runtime that class definition(s) herein
374 contained are to replace one(s) previously loaded. */
375 extern int flag_replace_objc_classes;
377 /* Nonzero means don't output line number information. */
379 extern char flag_no_line_commands;
381 /* Nonzero causes -E output not to be done, but directives such as
382 #define that have side effects are still obeyed. */
384 extern char flag_no_output;
386 /* Nonzero means dump macros in some fashion; contains the 'D', 'M' or
387 'N' of the command line switch. */
389 extern char flag_dump_macros;
391 /* Nonzero means pass #include lines through to the output. */
393 extern char flag_dump_includes;
395 /* The file name to which we should write a precompiled header, or
396 NULL if no header will be written in this compile. */
398 extern const char *pch_file;
400 /* Nonzero if an ISO standard was selected. It rejects macros in the
405 /* Nonzero if -undef was given. It suppresses target built-in macros
408 extern int flag_undef;
410 /* Nonzero means don't recognize the non-ANSI builtin functions. */
412 extern int flag_no_builtin;
414 /* Nonzero means don't recognize the non-ANSI builtin functions.
417 extern int flag_no_nonansi_builtin;
419 /* Nonzero means give `double' the same size as `float'. */
421 extern int flag_short_double;
423 /* Nonzero means give `wchar_t' the same size as `short'. */
425 extern int flag_short_wchar;
427 /* Nonzero means allow Microsoft extensions without warnings or errors. */
428 extern int flag_ms_extensions;
430 /* Nonzero means don't recognize the keyword `asm'. */
432 extern int flag_no_asm;
434 /* Nonzero means give string constants the type `const char *', as mandated
437 extern int flag_const_strings;
439 /* Nonzero means to treat bitfields as signed unless they say `unsigned'. */
441 extern int flag_signed_bitfields;
442 extern int explicit_flag_signed_bitfields;
444 /* Nonzero means warn about pointer casts that can drop a type qualifier
445 from the pointer target type. */
447 extern int warn_cast_qual;
449 /* Warn about functions which might be candidates for format attributes. */
451 extern int warn_missing_format_attribute;
453 /* Nonzero means warn about sizeof(function) or addition/subtraction
454 of function pointers. */
456 extern int warn_pointer_arith;
458 /* Nonzero means warn for any global function def
459 without separate previous prototype decl. */
461 extern int warn_missing_prototypes;
463 /* Warn if adding () is suggested. */
465 extern int warn_parentheses;
467 /* Warn if initializer is not completely bracketed. */
469 extern int warn_missing_braces;
471 /* Warn about comparison of signed and unsigned values.
472 If -1, neither -Wsign-compare nor -Wno-sign-compare has been specified. */
474 extern int warn_sign_compare;
476 /* Nonzero means warn about usage of long long when `-pedantic'. */
478 extern int warn_long_long;
480 /* Nonzero means warn about deprecated conversion from string constant to
483 extern int warn_write_strings;
485 /* Nonzero means warn about multiple (redundant) decls for the same single
486 variable or function. */
488 extern int warn_redundant_decls;
490 /* Warn about testing equality of floating point numbers. */
492 extern int warn_float_equal;
494 /* Warn about a subscript that has type char. */
496 extern int warn_char_subscripts;
498 /* Warn if a type conversion is done that might have confusing results. */
500 extern int warn_conversion;
502 /* Warn about #pragma directives that are not recognized. */
504 extern int warn_unknown_pragmas; /* Tri state variable. */
506 /* Warn about format/argument anomalies in calls to formatted I/O functions
507 (*printf, *scanf, strftime, strfmon, etc.). */
509 extern int warn_format;
511 /* Warn about Y2K problems with strftime formats. */
513 extern int warn_format_y2k;
515 /* Warn about excess arguments to formats. */
517 extern int warn_format_extra_args;
519 /* Warn about zero-length formats. */
521 extern int warn_format_zero_length;
523 /* Warn about non-literal format arguments. */
525 extern int warn_format_nonliteral;
527 /* Warn about possible security problems with calls to format functions. */
529 extern int warn_format_security;
532 /* C/ObjC language option variables. */
535 /* Nonzero means message about use of implicit function declarations;
536 1 means warning; 2 means error. */
538 extern int mesg_implicit_function_declaration;
540 /* Nonzero means allow type mismatches in conditional expressions;
541 just make their values `void'. */
543 extern int flag_cond_mismatch;
545 /* Nonzero means enable C89 Amendment 1 features. */
547 extern int flag_isoc94;
549 /* Nonzero means use the ISO C99 dialect of C. */
551 extern int flag_isoc99;
553 /* Nonzero means that we have builtin functions, and main is an int. */
555 extern int flag_hosted;
557 /* Nonzero means warn when casting a function call to a type that does
558 not match the return type (e.g. (float)sqrt() or (anything*)malloc()
559 when there is no previous declaration of sqrt or malloc. */
561 extern int warn_bad_function_cast;
563 /* Warn about traditional constructs whose meanings changed in ANSI C. */
565 extern int warn_traditional;
567 /* Nonzero means warn for a declaration found after a statement. */
569 extern int warn_declaration_after_statement;
571 /* Nonzero means warn for non-prototype function decls
572 or non-prototyped defs without previous prototype. */
574 extern int warn_strict_prototypes;
576 /* Nonzero means warn for any global function def
577 without separate previous decl. */
579 extern int warn_missing_declarations;
581 /* Nonzero means warn about extern declarations of objects not at
582 file-scope level and about *all* declarations of functions (whether
583 extern or static) not at file-scope level. Note that we exclude
584 implicit function declarations. To get warnings about those, use
587 extern int warn_nested_externs;
589 /* Warn if main is suspicious. */
591 extern int warn_main;
593 /* Nonzero means warn about possible violations of sequence point rules. */
595 extern int warn_sequence_point;
597 /* Nonzero means warn about uninitialized variable when it is initialized with itself.
598 For example: int i = i;, GCC will not warn about this when warn_init_self is nonzero. */
600 extern int warn_init_self;
603 /* Nonzero means to warn about compile-time division by zero. */
604 extern int warn_div_by_zero;
606 /* Nonzero means warn about use of implicit int. */
608 extern int warn_implicit_int;
610 /* Warn about NULL being passed to argument slots marked as requiring
613 extern int warn_nonnull;
615 /* Warn about old-style parameter declaration. */
617 extern int warn_old_style_definition;
620 /* ObjC language option variables. */
623 /* Open and close the file for outputting class declarations, if
626 extern int flag_gen_declaration;
628 /* Generate code for GNU or NeXT runtime environment. */
630 extern int flag_next_runtime;
632 /* Tells the compiler that this is a special run. Do not perform any
633 compiling, instead we are to test some platform dependent features
634 and output a C header file with appropriate definitions. */
636 extern int print_struct_values;
638 /* ???. Undocumented. */
640 extern const char *constant_string_class_name;
642 /* Warn if multiple methods are seen for the same selector, but with
643 different argument types. Performs the check on the whole selector
644 table at the end of compilation. */
646 extern int warn_selector;
648 /* Warn if a @selector() is found, and no method with that selector
649 has been previously declared. The check is done on each
650 @selector() as soon as it is found - so it warns about forward
653 extern int warn_undeclared_selector;
655 /* Warn if methods required by a protocol are not implemented in the
656 class adopting it. When turned off, methods inherited to that
657 class are also considered implemented. */
659 extern int warn_protocol;
662 /* C++ language option variables. */
665 /* Nonzero means don't recognize any extension keywords. */
667 extern int flag_no_gnu_keywords;
669 /* Nonzero means do emit exported implementations of functions even if
670 they can be inlined. */
672 extern int flag_implement_inlines;
674 /* Nonzero means that implicit instantiations will be emitted if needed. */
676 extern int flag_implicit_templates;
678 /* Nonzero means that implicit instantiations of inline templates will be
679 emitted if needed, even if instantiations of non-inline templates
682 extern int flag_implicit_inline_templates;
684 /* Nonzero means generate separate instantiation control files and
685 juggle them at link time. */
687 extern int flag_use_repository;
689 /* Nonzero if we want to issue diagnostics that the standard says are not
692 extern int flag_optional_diags;
694 /* Nonzero means we should attempt to elide constructors when possible. */
696 extern int flag_elide_constructors;
698 /* Nonzero means that member functions defined in class scope are
699 inline by default. */
701 extern int flag_default_inline;
703 /* Controls whether compiler generates 'type descriptor' that give
704 run-time type information. */
706 extern int flag_rtti;
708 /* Nonzero if we want to conserve space in the .o files. We do this
709 by putting uninitialized data and runtime initialized data into
710 .common instead of .data at the expense of not flagging multiple
713 extern int flag_conserve_space;
715 /* Nonzero if we want to obey access control semantics. */
717 extern int flag_access_control;
719 /* Nonzero if we want to check the return value of new and avoid calling
720 constructors if it is a null pointer. */
722 extern int flag_check_new;
724 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
725 initialization variables.
726 0: Old rules, set by -fno-for-scope.
727 2: New ISO rules, set by -ffor-scope.
728 1: Try to implement new ISO rules, but with backup compatibility
729 (and warnings). This is the default, for now. */
731 extern int flag_new_for_scope;
733 /* Nonzero if we want to emit defined symbols with common-like linkage as
734 weak symbols where possible, in order to conform to C++ semantics.
735 Otherwise, emit them as local symbols. */
737 extern int flag_weak;
739 /* 0 means we want the preprocessor to not emit line directives for
740 the current working directory. 1 means we want it to do it. -1
741 means we should decide depending on whether debugging information
742 is being emitted or not. */
744 extern int flag_working_directory;
746 /* Nonzero to use __cxa_atexit, rather than atexit, to register
747 destructors for local statics and global objects. */
749 extern int flag_use_cxa_atexit;
751 /* Nonzero means make the default pedwarns warnings instead of errors.
752 The value of this flag is ignored if -pedantic is specified. */
754 extern int flag_permissive;
756 /* Nonzero means to implement standard semantics for exception
757 specifications, calling unexpected if an exception is thrown that
758 doesn't match the specification. Zero means to treat them as
759 assertions and optimize accordingly, but not check them. */
761 extern int flag_enforce_eh_specs;
763 /* The version of the C++ ABI in use. The following values are
766 0: The version of the ABI believed most conformant with the
767 C++ ABI specification. This ABI may change as bugs are
768 discovered and fixed. Therefore, 0 will not necessarily
769 indicate the same ABI in different versions of G++.
771 1: The version of the ABI first used in G++ 3.2.
773 Additional positive integers will be assigned as new versions of
774 the ABI become the default version of the ABI. */
776 extern int flag_abi_version;
778 /* Nonzero means warn about things that will change when compiling
779 with an ABI-compliant compiler. */
783 /* Nonzero means warn about invalid uses of offsetof. */
785 extern int warn_invalid_offsetof;
787 /* Nonzero means warn about implicit declarations. */
789 extern int warn_implicit;
791 /* Nonzero means warn when all ctors or dtors are private, and the class
794 extern int warn_ctor_dtor_privacy;
796 /* Nonzero means warn in function declared in derived class has the
797 same name as a virtual in the base class, but fails to match the
798 type signature of any virtual function in the base class. */
800 extern int warn_overloaded_virtual;
802 /* Nonzero means warn when declaring a class that has a non virtual
803 destructor, when it really ought to have a virtual one. */
805 extern int warn_nonvdtor;
807 /* Nonzero means warn when the compiler will reorder code. */
809 extern int warn_reorder;
811 /* Nonzero means warn when synthesis behavior differs from Cfront's. */
813 extern int warn_synth;
815 /* Nonzero means warn when we convert a pointer to member function
816 into a pointer to (void or function). */
818 extern int warn_pmf2ptr;
820 /* Nonzero means warn about violation of some Effective C++ style rules. */
822 extern int warn_ecpp;
824 /* Nonzero means warn where overload resolution chooses a promotion from
825 unsigned to signed over a conversion to an unsigned of the same size. */
827 extern int warn_sign_promo;
829 /* Nonzero means warn when an old-style cast is used. */
831 extern int warn_old_style_cast;
833 /* Nonzero means warn when non-templatized friend functions are
834 declared within a template */
836 extern int warn_nontemplate_friend;
838 /* Nonzero means complain about deprecated features. */
840 extern int warn_deprecated;
842 /* Maximum template instantiation depth. This limit is rather
843 arbitrary, but it exists to limit the time it takes to notice
844 infinite template instantiations. */
846 extern int max_tinst_depth;
848 /* Nonzero means the expression being parsed will never be evaluated.
849 This is a count, since unevaluated expressions can nest. */
851 extern int skip_evaluation;
853 /* C types are partitioned into three subsets: object, function, and
855 #define C_TYPE_OBJECT_P(type) \
856 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
858 #define C_TYPE_INCOMPLETE_P(type) \
859 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
861 #define C_TYPE_FUNCTION_P(type) \
862 (TREE_CODE (type) == FUNCTION_TYPE)
864 /* For convenience we define a single macro to identify the class of
865 object or incomplete types. */
866 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
867 (!C_TYPE_FUNCTION_P (type))
869 /* Record in each node resulting from a binary operator
870 what operator was specified for it. */
871 #define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp))
873 /* Attribute table common to the C front ends. */
874 extern const struct attribute_spec c_common_attribute_table[];
875 extern const struct attribute_spec c_common_format_attribute_table[];
877 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
878 ID is the identifier to use, NAME is the string.
879 TYPE_DEP indicates whether it depends on type of the function or not
880 (i.e. __PRETTY_FUNCTION__). */
882 extern tree (*make_fname_decl) (tree, int);
884 extern tree identifier_global_value (tree);
885 extern void record_builtin_type (enum rid, const char *, tree);
886 extern tree build_void_list_node (void);
887 extern void start_fname_decls (void);
888 extern void finish_fname_decls (void);
889 extern const char *fname_as_string (int);
890 extern tree fname_decl (unsigned, tree);
892 extern void check_function_arguments (tree, tree);
893 extern void check_function_arguments_recurse (void (*)
895 unsigned HOST_WIDE_INT),
897 unsigned HOST_WIDE_INT);
898 extern void check_function_format (int *, tree, tree);
899 extern void set_Wformat (int);
900 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
901 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
902 extern int c_common_handle_option (size_t code, const char *arg, int value);
903 extern bool c_common_missing_argument (const char *opt, size_t code);
904 extern tree c_common_type_for_mode (enum machine_mode, int);
905 extern tree c_common_type_for_size (unsigned int, int);
906 extern tree c_common_unsigned_type (tree);
907 extern tree c_common_signed_type (tree);
908 extern tree c_common_signed_or_unsigned_type (int, tree);
909 extern tree c_common_truthvalue_conversion (tree);
910 extern void c_apply_type_quals_to_decl (int, tree);
911 extern tree c_sizeof_or_alignof_type (tree, enum tree_code, int);
912 extern tree c_alignof_expr (tree);
913 /* Print an error message for invalid operands to arith operation CODE.
914 NOP_EXPR is used as a special case (see truthvalue_conversion). */
915 extern void binary_op_error (enum tree_code);
916 #define my_friendly_assert(EXP, N) (void) \
917 (((EXP) == 0) ? (fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0) : 0)
919 extern tree c_expand_expr_stmt (tree);
920 extern void c_expand_start_cond (tree, int, tree);
921 extern void c_finish_then (void);
922 extern void c_expand_start_else (void);
923 extern void c_finish_else (void);
924 extern void c_expand_end_cond (void);
925 /* Validate the expression after `case' and apply default promotions. */
926 extern tree check_case_value (tree);
927 extern tree fix_string_type (tree);
928 struct varray_head_tag;
929 extern void constant_expression_warning (tree);
930 extern tree convert_and_check (tree, tree);
931 extern void overflow_warning (tree);
932 extern void unsigned_conversion_warning (tree, tree);
934 /* Read the rest of the current #-directive line. */
935 extern char *get_directive_line (void);
936 #define GET_DIRECTIVE_LINE() get_directive_line ()
937 #define c_sizeof(T) c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 1)
938 #define c_alignof(T) c_sizeof_or_alignof_type (T, ALIGNOF_EXPR, 1)
940 /* Subroutine of build_binary_op, used for comparison operations.
941 See if the operands have both been converted from subword integer types
942 and, if so, perhaps change them both back to their original type. */
943 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
945 extern tree pointer_int_sum (enum tree_code, tree, tree);
946 extern unsigned int min_precision (tree, int);
948 /* Add qualifiers to a type, in the fashion for C. */
949 extern tree c_build_qualified_type (tree, int);
951 /* Build tree nodes and builtin functions common to both C and C++ language
953 extern void c_common_nodes_and_builtins (void);
955 extern void disable_builtin_function (const char *);
957 extern tree build_va_arg (tree, tree);
959 extern unsigned int c_common_init_options (unsigned int, const char **);
960 extern bool c_common_post_options (const char **);
961 extern bool c_common_init (void);
962 extern void c_common_finish (void);
963 extern void c_common_parse_file (int);
964 extern HOST_WIDE_INT c_common_get_alias_set (tree);
965 extern void c_register_builtin_type (tree, const char*);
966 extern bool c_promoting_integer_type_p (tree);
967 extern int self_promoting_args_p (tree);
968 extern tree strip_array_types (tree);
969 extern tree strip_pointer_operator (tree);
971 /* This function resets the parsers' state in preparation for parsing
973 extern void c_reset_state (void);
974 /* This is the basic parsing function. */
975 extern void c_parse_file (void);
976 /* This is misnamed, it actually performs end-of-compilation processing. */
977 extern void finish_file (void);
979 /* These macros provide convenient access to the various _STMT nodes. */
981 /* Nonzero if this statement should be considered a full-expression,
982 i.e., if temporaries created during this statement should have
983 their destructors run at the end of this statement. (In C, this
984 will always be false, since there are no destructors.) */
985 #define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
987 /* IF_STMT accessors. These give access to the condition of the if
988 statement, the then block of the if statement, and the else block
989 of the if statement if it exists. */
990 #define IF_COND(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 0)
991 #define THEN_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 1)
992 #define ELSE_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 2)
994 /* WHILE_STMT accessors. These give access to the condition of the
995 while statement and the body of the while statement, respectively. */
996 #define WHILE_COND(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
997 #define WHILE_BODY(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
999 /* DO_STMT accessors. These give access to the condition of the do
1000 statement and the body of the do statement, respectively. */
1001 #define DO_COND(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
1002 #define DO_BODY(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
1004 /* RETURN_STMT accessors. These give the expression associated with a
1005 return statement, and whether it should be ignored when expanding
1006 (as opposed to inlining). */
1007 #define RETURN_STMT_EXPR(NODE) TREE_OPERAND (RETURN_STMT_CHECK (NODE), 0)
1009 /* EXPR_STMT accessor. This gives the expression associated with an
1010 expression statement. */
1011 #define EXPR_STMT_EXPR(NODE) TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
1013 /* FOR_STMT accessors. These give access to the init statement,
1014 condition, update expression, and body of the for statement,
1016 #define FOR_INIT_STMT(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
1017 #define FOR_COND(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
1018 #define FOR_EXPR(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
1019 #define FOR_BODY(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
1021 /* SWITCH_STMT accessors. These give access to the condition, body and
1022 original condition type (before any compiler conversions)
1023 of the switch statement, respectively. */
1024 #define SWITCH_COND(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 0)
1025 #define SWITCH_BODY(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 1)
1026 #define SWITCH_TYPE(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 2)
1028 /* CASE_LABEL accessors. These give access to the high and low values
1029 of a case label, respectively. */
1030 #define CASE_LOW(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 0)
1031 #define CASE_HIGH(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 1)
1032 #define CASE_LABEL_DECL(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 2)
1034 /* GOTO_STMT accessor. This gives access to the label associated with
1035 a goto statement. */
1036 #define GOTO_DESTINATION(NODE) TREE_OPERAND (GOTO_STMT_CHECK (NODE), 0)
1037 /* True for goto created artificially by the compiler. */
1038 #define GOTO_FAKE_P(NODE) (TREE_LANG_FLAG_0 (GOTO_STMT_CHECK (NODE)))
1040 /* COMPOUND_STMT accessor. This gives access to the TREE_LIST of
1041 statements associated with a compound statement. The result is the
1042 first statement in the list. Succeeding nodes can be accessed by
1043 calling TREE_CHAIN on a node in the list. */
1044 #define COMPOUND_BODY(NODE) TREE_OPERAND (COMPOUND_STMT_CHECK (NODE), 0)
1046 /* ASM_STMT accessors. ASM_STRING returns a STRING_CST for the
1047 instruction (e.g., "mov x, y"). ASM_OUTPUTS, ASM_INPUTS, and
1048 ASM_CLOBBERS represent the outputs, inputs, and clobbers for the
1050 #define ASM_CV_QUAL(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 0)
1051 #define ASM_STRING(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 1)
1052 #define ASM_OUTPUTS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 2)
1053 #define ASM_INPUTS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 3)
1054 #define ASM_CLOBBERS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 4)
1056 /* DECL_STMT accessor. This gives access to the DECL associated with
1057 the given declaration statement. */
1058 #define DECL_STMT_DECL(NODE) TREE_OPERAND (DECL_STMT_CHECK (NODE), 0)
1060 /* STMT_EXPR accessor. */
1061 #define STMT_EXPR_STMT(NODE) TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
1063 /* Nonzero if this statement-expression does not have an associated scope. */
1064 #define STMT_EXPR_NO_SCOPE(NODE) \
1065 TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))
1067 /* Nonzero if this statement-expression should cause warning if its result
1069 #define STMT_EXPR_WARN_UNUSED_RESULT(NODE) \
1070 TREE_LANG_FLAG_3 (STMT_EXPR_CHECK (NODE))
1072 /* LABEL_STMT accessor. This gives access to the label associated with
1073 the given label statement. */
1074 #define LABEL_STMT_LABEL(NODE) TREE_OPERAND (LABEL_STMT_CHECK (NODE), 0)
1076 /* COMPOUND_LITERAL_EXPR accessors. */
1077 #define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \
1078 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
1079 #define COMPOUND_LITERAL_EXPR_DECL(NODE) \
1080 DECL_STMT_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
1082 /* Nonzero if this SCOPE_STMT is for the beginning of a scope. */
1083 #define SCOPE_BEGIN_P(NODE) \
1084 (TREE_LANG_FLAG_0 (SCOPE_STMT_CHECK (NODE)))
1086 /* Nonzero if this SCOPE_STMT is for the end of a scope. */
1087 #define SCOPE_END_P(NODE) \
1088 (!SCOPE_BEGIN_P (SCOPE_STMT_CHECK (NODE)))
1090 /* The BLOCK containing the declarations contained in this scope. */
1091 #define SCOPE_STMT_BLOCK(NODE) \
1092 (TREE_OPERAND (SCOPE_STMT_CHECK (NODE), 0))
1094 /* Nonzero for a SCOPE_STMT if there were no variables in this scope. */
1095 #define SCOPE_NULLIFIED_P(NODE) \
1096 (SCOPE_STMT_BLOCK ((NODE)) == NULL_TREE)
1098 /* Nonzero for a SCOPE_STMT which represents a lexical scope, but
1099 which should be treated as non-existent from the point of view of
1100 running cleanup actions. */
1101 #define SCOPE_NO_CLEANUPS_P(NODE) \
1102 (TREE_LANG_FLAG_3 (SCOPE_STMT_CHECK (NODE)))
1104 /* Nonzero for a SCOPE_STMT if this statement is for a partial scope.
1112 there is (implicitly) a new scope after `l', even though there are
1113 no curly braces. In particular, when we hit the goto, we must
1114 destroy s2 and then re-construct it. For the implicit scope,
1115 SCOPE_PARTIAL_P will be set. */
1116 #define SCOPE_PARTIAL_P(NODE) \
1117 (TREE_LANG_FLAG_4 (SCOPE_STMT_CHECK (NODE)))
1119 /* Nonzero for an ASM_STMT if the assembly statement is volatile. */
1120 #define ASM_VOLATILE_P(NODE) \
1121 (ASM_CV_QUAL (ASM_STMT_CHECK (NODE)) != NULL_TREE)
1123 /* The VAR_DECL to clean up in a CLEANUP_STMT. */
1124 #define CLEANUP_DECL(NODE) \
1125 TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 0)
1126 /* The cleanup to run in a CLEANUP_STMT. */
1127 #define CLEANUP_EXPR(NODE) \
1128 TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 1)
1130 /* The filename we are changing to as of this FILE_STMT. */
1131 #define FILE_STMT_FILENAME_NODE(NODE) \
1132 (TREE_OPERAND (FILE_STMT_CHECK (NODE), 0))
1133 #define FILE_STMT_FILENAME(NODE) \
1134 (IDENTIFIER_POINTER (FILE_STMT_FILENAME_NODE (NODE)))
1136 /* The line-number at which a statement began. But if
1137 STMT_LINENO_FOR_FN_P does holds, then this macro gives the
1138 line number for the end of the current function instead. */
1139 #define STMT_LINENO(NODE) \
1140 (TREE_COMPLEXITY ((NODE)))
1142 /* If nonzero, the STMT_LINENO for NODE is the line at which the
1144 #define STMT_LINENO_FOR_FN_P(NODE) \
1145 (TREE_LANG_FLAG_2 ((NODE)))
1147 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
1148 initialization variables. */
1149 #define NEW_FOR_SCOPE_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1151 /* Nonzero if we want to create an ASM_INPUT instead of an
1152 ASM_OPERAND with no operands. */
1153 #define ASM_INPUT_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1155 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
1158 C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
1159 #include "c-common.def"
1165 #define c_common_stmt_codes \
1166 CLEANUP_STMT, EXPR_STMT, COMPOUND_STMT, \
1167 DECL_STMT, IF_STMT, FOR_STMT, \
1168 WHILE_STMT, DO_STMT, RETURN_STMT, \
1169 BREAK_STMT, CONTINUE_STMT, SCOPE_STMT, \
1170 SWITCH_STMT, GOTO_STMT, LABEL_STMT, \
1171 ASM_STMT, FILE_STMT, CASE_LABEL
1173 /* TRUE if a code represents a statement. The front end init
1174 langhook should take care of initialization of this array. */
1175 extern bool statement_code_p[MAX_TREE_CODES];
1177 #define STATEMENT_CODE_P(CODE) statement_code_p[(int) (CODE)]
1179 #define INIT_STATEMENT_CODES(STMT_CODES) \
1182 memset (&statement_code_p, 0, sizeof (statement_code_p)); \
1183 for (i = 0; i < ARRAY_SIZE (STMT_CODES); i++) \
1184 statement_code_p[STMT_CODES[i]] = true; \
1187 extern void genrtl_do_pushlevel (void);
1188 extern void genrtl_goto_stmt (tree);
1189 extern void genrtl_expr_stmt (tree);
1190 extern void genrtl_expr_stmt_value (tree, int, int);
1191 extern void genrtl_decl_stmt (tree);
1192 extern void genrtl_if_stmt (tree);
1193 extern void genrtl_while_stmt (tree);
1194 extern void genrtl_do_stmt (tree);
1195 extern void genrtl_return_stmt (tree);
1196 extern void genrtl_for_stmt (tree);
1197 extern void genrtl_break_stmt (void);
1198 extern void genrtl_continue_stmt (void);
1199 extern void genrtl_scope_stmt (tree);
1200 extern void genrtl_switch_stmt (tree);
1201 extern void genrtl_case_label (tree);
1202 extern void genrtl_compound_stmt (tree);
1203 extern void genrtl_asm_stmt (tree, tree, tree, tree, tree, int);
1204 extern void genrtl_cleanup_stmt (tree);
1205 extern int stmts_are_full_exprs_p (void);
1206 extern int anon_aggr_type_p (tree);
1208 /* For a VAR_DECL that is an anonymous union, these are the various
1209 sub-variables that make up the anonymous union. */
1210 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
1212 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
1213 #define DECL_C_BIT_FIELD(NODE) \
1214 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
1215 #define SET_DECL_C_BIT_FIELD(NODE) \
1216 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
1217 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
1218 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
1220 /* In a VAR_DECL, nonzero if the decl is a register variable with
1221 an explicit asm specification. */
1222 #define DECL_C_HARD_REGISTER(DECL) DECL_LANG_FLAG_4 (VAR_DECL_CHECK (DECL))
1224 extern void emit_local_var (tree);
1225 extern void make_rtl_for_local_static (tree);
1226 extern tree expand_cond (tree);
1227 extern tree c_expand_return (tree);
1228 extern tree do_case (tree, tree);
1229 extern tree build_stmt (enum tree_code, ...);
1230 extern tree build_case_label (tree, tree, tree);
1231 extern tree build_continue_stmt (void);
1232 extern tree build_break_stmt (void);
1233 extern tree build_return_stmt (tree);
1235 #define COMPOUND_STMT_NO_SCOPE(NODE) TREE_LANG_FLAG_0 (NODE)
1237 /* Used by the C++ frontend to mark the block around the member
1238 initializers and cleanups. */
1239 #define COMPOUND_STMT_BODY_BLOCK(NODE) TREE_LANG_FLAG_3 (NODE)
1241 extern void c_expand_asm_operands (tree, tree, tree, tree, int, location_t);
1243 /* These functions must be defined by each front-end which implements
1244 a variant of the C language. They are used in c-common.c. */
1246 extern tree build_unary_op (enum tree_code, tree, int);
1247 extern tree build_binary_op (enum tree_code, tree, tree, int);
1248 extern int lvalue_p (tree);
1249 extern tree default_conversion (tree);
1251 /* Given two integer or real types, return the type for their sum.
1252 Given two compatible ANSI C types, returns the merged type. */
1254 extern tree common_type (tree, tree);
1256 extern tree expand_tree_builtin (tree, tree, tree);
1258 extern tree decl_constant_value (tree);
1260 /* Handle increment and decrement of boolean types. */
1261 extern tree boolean_increment (enum tree_code, tree);
1263 /* Hook currently used only by the C++ front end to reset internal state
1264 after entering or leaving a header file. */
1265 extern void extract_interface_info (void);
1267 extern int case_compare (splay_tree_key, splay_tree_key);
1269 extern tree c_add_case_label (splay_tree, tree, tree, tree);
1271 extern tree build_function_call (tree, tree);
1273 extern tree finish_label_address_expr (tree);
1275 /* Same function prototype, but the C and C++ front ends have
1276 different implementations. Used in c-common.c. */
1277 extern tree lookup_label (tree);
1279 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
1281 extern int c_safe_from_p (rtx, tree);
1283 extern int c_staticp (tree);
1285 extern int c_common_unsafe_for_reeval (tree);
1287 extern void init_c_lex (void);
1289 extern void c_cpp_builtins (cpp_reader *);
1291 /* Positive if an implicit `extern "C"' scope has just been entered;
1292 negative if such a scope has just been exited. */
1293 extern int pending_lang_change;
1295 /* Information recorded about each file examined during compilation. */
1299 int time; /* Time spent in the file. */
1300 short interface_only; /* Flags - used only by C++ */
1301 short interface_unknown;
1304 struct c_fileinfo *get_fileinfo (const char *);
1305 extern void dump_time_statistics (void);
1307 extern bool c_dump_tree (void *, tree);
1309 extern void pch_init (void);
1310 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
1311 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
1313 extern void c_common_write_pch (void);
1314 extern void c_common_no_more_pch (void);
1315 extern void builtin_define_with_value (const char *, const char *, int);
1316 extern void c_stddef_cpp_builtins (void);
1317 extern void fe_file_change (const struct line_map *);
1318 extern int c_estimate_num_insns (tree decl);
1319 extern bool c_decl_uninit (tree t);
1320 extern void c_parse_error (const char *, enum cpp_ttype, tree);
1322 /* The following have been moved here from c-tree.h, since they're needed
1323 in the ObjC++ world, too. What is more, stub-objc.c could use a few
1325 extern tree lookup_interface (tree);
1326 extern tree is_class_name (tree);
1327 extern tree objc_is_object_ptr (tree);
1328 extern void objc_check_decl (tree);
1329 extern int objc_comptypes (tree, tree, int);
1330 extern tree objc_message_selector (void);
1331 extern tree lookup_objc_ivar (tree);
1332 extern void *get_current_scope (void);
1333 extern void objc_mark_locals_volatile (void *);
1335 /* In c-ppoutput.c */
1336 extern void init_pp_output (FILE *);
1337 extern void preprocess_file (cpp_reader *);
1338 extern void pp_file_change (const struct line_map *);
1339 extern void pp_dir_change (cpp_reader *, const char *);
1341 #endif /* ! GCC_C_COMMON_H */