FSF GCC merge 02/23/03
[official-gcc.git] / gcc / c-common.h
blob8164fa809426e9c4d2a55dedab41c461d6178f58
1 /* Definitions for c-common.c.
2 Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
3 1999, 2000, 2001, 2002 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
10 version.
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
15 for more details.
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
20 02111-1307, USA. */
22 #ifndef GCC_C_COMMON_H
23 #define GCC_C_COMMON_H
25 #include "splay-tree.h"
26 #include "cpplib.h"
28 /* Usage of TREE_LANG_FLAG_?:
29 0: COMPOUND_STMT_NO_SCOPE (in COMPOUND_STMT).
30 TREE_NEGATED_INT (in INTEGER_CST).
31 IDENTIFIER_MARKED (used by search routines).
32 SCOPE_BEGIN_P (in SCOPE_STMT)
33 DECL_PRETTY_FUNCTION_P (in VAR_DECL)
34 NEW_FOR_SCOPE_P (in FOR_STMT)
35 ASM_INPUT_P (in ASM_STMT)
36 STMT_EXPR_NO_SCOPE (in STMT_EXPR)
37 1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
38 STMT_IS_FULL_EXPR_P (in _STMT)
39 2: STMT_LINENO_FOR_FN_P (in _STMT)
40 3: SCOPE_NO_CLEANUPS_P (in SCOPE_STMT)
41 COMPOUND_STMT_BODY_BLOCK (in COMPOUND_STMT)
42 4: SCOPE_PARTIAL_P (in SCOPE_STMT)
45 /* Reserved identifiers. This is the union of all the keywords for C,
46 C++, and Objective-C. All the type modifiers have to be in one
47 block at the beginning, because they are used as mask bits. There
48 are 27 type modifiers; if we add many more we will have to redesign
49 the mask mechanism. */
51 enum rid
53 /* Modifiers: */
54 /* C, in empirical order of frequency. */
55 RID_STATIC = 0,
56 RID_UNSIGNED, RID_LONG, RID_CONST, RID_EXTERN,
57 RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
58 RID_VOLATILE, RID_SIGNED, RID_AUTO, RID_RESTRICT,
60 /* C extensions */
61 RID_BOUNDED, RID_UNBOUNDED, RID_COMPLEX, RID_THREAD,
63 /* C++ */
64 RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
66 /* ObjC */
67 RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
69 /* C */
70 RID_INT, RID_CHAR, RID_FLOAT, RID_DOUBLE, RID_VOID,
71 RID_ENUM, RID_STRUCT, RID_UNION, RID_IF, RID_ELSE,
72 RID_WHILE, RID_DO, RID_FOR, RID_SWITCH, RID_CASE,
73 RID_DEFAULT, RID_BREAK, RID_CONTINUE, RID_RETURN, RID_GOTO,
74 RID_SIZEOF,
76 /* C extensions */
77 RID_ASM, RID_TYPEOF, RID_ALIGNOF, RID_ATTRIBUTE, RID_VA_ARG,
78 RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL, RID_PTRBASE,
79 RID_PTREXTENT, RID_PTRVALUE, RID_CHOOSE_EXPR, RID_TYPES_COMPATIBLE_P,
81 /* Too many ways of getting the name of a function as a string */
82 RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
84 /* C++ */
85 RID_BOOL, RID_WCHAR, RID_CLASS,
86 RID_PUBLIC, RID_PRIVATE, RID_PROTECTED,
87 RID_TEMPLATE, RID_NULL, RID_CATCH,
88 RID_DELETE, RID_FALSE, RID_NAMESPACE,
89 RID_NEW, RID_OPERATOR, RID_THIS,
90 RID_THROW, RID_TRUE, RID_TRY,
91 RID_TYPENAME, RID_TYPEID, RID_USING,
93 /* casts */
94 RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
96 /* Objective-C */
97 RID_ID, RID_AT_ENCODE, RID_AT_END,
98 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS,
99 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC,
100 RID_AT_PROTOCOL, RID_AT_SELECTOR, RID_AT_INTERFACE,
101 RID_AT_IMPLEMENTATION,
103 RID_MAX,
105 RID_FIRST_MODIFIER = RID_STATIC,
106 RID_LAST_MODIFIER = RID_ONEWAY,
108 RID_FIRST_AT = RID_AT_ENCODE,
109 RID_LAST_AT = RID_AT_IMPLEMENTATION,
110 RID_FIRST_PQ = RID_IN,
111 RID_LAST_PQ = RID_ONEWAY
114 #define OBJC_IS_AT_KEYWORD(rid) \
115 ((unsigned int)(rid) >= (unsigned int)RID_FIRST_AT && \
116 (unsigned int)(rid) <= (unsigned int)RID_LAST_AT)
118 #define OBJC_IS_PQ_KEYWORD(rid) \
119 ((unsigned int)(rid) >= (unsigned int)RID_FIRST_PQ && \
120 (unsigned int)(rid) <= (unsigned int)RID_LAST_PQ)
122 /* The elements of `ridpointers' are identifier nodes for the reserved
123 type names and storage classes. It is indexed by a RID_... value. */
124 extern GTY ((length ("(int)RID_MAX"))) tree *ridpointers;
126 /* Standard named or nameless data types of the C compiler. */
128 enum c_tree_index
130 CTI_WCHAR_TYPE,
131 CTI_SIGNED_WCHAR_TYPE,
132 CTI_UNSIGNED_WCHAR_TYPE,
133 CTI_WINT_TYPE,
134 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
135 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
136 CTI_INTMAX_TYPE,
137 CTI_UINTMAX_TYPE,
138 CTI_WIDEST_INT_LIT_TYPE,
139 CTI_WIDEST_UINT_LIT_TYPE,
141 CTI_CHAR_ARRAY_TYPE,
142 CTI_WCHAR_ARRAY_TYPE,
143 CTI_INT_ARRAY_TYPE,
144 CTI_STRING_TYPE,
145 CTI_CONST_STRING_TYPE,
147 /* Type for boolean expressions (bool in C++, int in C). */
148 CTI_BOOLEAN_TYPE,
149 CTI_BOOLEAN_TRUE,
150 CTI_BOOLEAN_FALSE,
151 /* C99's _Bool type. */
152 CTI_C_BOOL_TYPE,
153 CTI_C_BOOL_TRUE,
154 CTI_C_BOOL_FALSE,
155 CTI_DEFAULT_FUNCTION_TYPE,
157 CTI_G77_INTEGER_TYPE,
158 CTI_G77_UINTEGER_TYPE,
159 CTI_G77_LONGINT_TYPE,
160 CTI_G77_ULONGINT_TYPE,
162 /* These are not types, but we have to look them up all the time. */
163 CTI_FUNCTION_NAME_DECL,
164 CTI_PRETTY_FUNCTION_NAME_DECL,
165 CTI_C99_FUNCTION_NAME_DECL,
166 CTI_SAVED_FUNCTION_NAME_DECLS,
168 CTI_VOID_ZERO,
170 CTI_MAX
173 #define C_RID_CODE(id) (((struct c_common_identifier *) (id))->node.rid_code)
175 /* Identifier part common to the C front ends. Inherits from
176 tree_identifier, despite appearances. */
177 struct c_common_identifier GTY(())
179 struct tree_common common;
180 struct cpp_hashnode node;
183 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
184 #define signed_wchar_type_node c_global_trees[CTI_SIGNED_WCHAR_TYPE]
185 #define unsigned_wchar_type_node c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
186 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
187 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
188 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
189 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
190 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
191 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
192 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
194 #define boolean_type_node c_global_trees[CTI_BOOLEAN_TYPE]
195 #define boolean_true_node c_global_trees[CTI_BOOLEAN_TRUE]
196 #define boolean_false_node c_global_trees[CTI_BOOLEAN_FALSE]
198 #define c_bool_type_node c_global_trees[CTI_C_BOOL_TYPE]
199 #define c_bool_true_node c_global_trees[CTI_C_BOOL_TRUE]
200 #define c_bool_false_node c_global_trees[CTI_C_BOOL_FALSE]
202 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
203 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
204 #define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
205 #define string_type_node c_global_trees[CTI_STRING_TYPE]
206 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
208 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
210 /* g77 integer types, which which must be kept in sync with f/com.h */
211 #define g77_integer_type_node c_global_trees[CTI_G77_INTEGER_TYPE]
212 #define g77_uinteger_type_node c_global_trees[CTI_G77_UINTEGER_TYPE]
213 #define g77_longint_type_node c_global_trees[CTI_G77_LONGINT_TYPE]
214 #define g77_ulongint_type_node c_global_trees[CTI_G77_ULONGINT_TYPE]
216 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
217 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
218 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
219 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
221 /* A node for `((void) 0)'. */
222 #define void_zero_node c_global_trees[CTI_VOID_ZERO]
224 extern GTY(()) tree c_global_trees[CTI_MAX];
226 /* Mark which labels are explicitly declared.
227 These may be shadowed, and may be referenced from nested functions. */
228 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
230 /* Flag strings given by __FUNCTION__ and __PRETTY_FUNCTION__ for a
231 warning if they undergo concatenation. */
232 #define C_ARTIFICIAL_STRING_P(NODE) TREE_LANG_FLAG_0 (NODE)
234 typedef enum c_language_kind
236 clk_c = 0, /* A dialect of C: K&R C, ANSI/ISO C89, C2000, etc. */
237 clk_cplusplus /* ANSI/ISO C++ */
239 c_language_kind;
241 /* Information about a statement tree. */
243 struct stmt_tree_s GTY(()) {
244 /* The last statement added to the tree. */
245 tree x_last_stmt;
246 /* The type of the last expression statement. (This information is
247 needed to implement the statement-expression extension.) */
248 tree x_last_expr_type;
249 /* The last filename we recorded. */
250 const char *x_last_expr_filename;
251 /* In C++, Nonzero if we should treat statements as full
252 expressions. In particular, this variable is no-zero if at the
253 end of a statement we should destroy any temporaries created
254 during that statement. Similarly, if, at the end of a block, we
255 should destroy any local variables in this block. Normally, this
256 variable is nonzero, since those are the normal semantics of
257 C++.
259 However, in order to represent aggregate initialization code as
260 tree structure, we use statement-expressions. The statements
261 within the statement expression should not result in cleanups
262 being run until the entire enclosing statement is complete.
264 This flag has no effect in C. */
265 int stmts_are_full_exprs_p;
268 typedef struct stmt_tree_s *stmt_tree;
270 /* Global state pertinent to the current function. Some C dialects
271 extend this structure with additional fields. */
273 struct c_language_function GTY(()) {
274 /* While we are parsing the function, this contains information
275 about the statement-tree that we are building. */
276 struct stmt_tree_s x_stmt_tree;
277 /* The stack of SCOPE_STMTs for the current function. */
278 tree x_scope_stmt_stack;
281 /* When building a statement-tree, this is the last statement added to
282 the tree. */
284 #define last_tree (current_stmt_tree ()->x_last_stmt)
286 /* The type of the last expression-statement we have seen. */
288 #define last_expr_type (current_stmt_tree ()->x_last_expr_type)
290 /* The name of the last file we have seen. */
292 #define last_expr_filename (current_stmt_tree ()->x_last_expr_filename)
294 /* LAST_TREE contains the last statement parsed. These are chained
295 together through the TREE_CHAIN field, but often need to be
296 re-organized since the parse is performed bottom-up. This macro
297 makes LAST_TREE the indicated SUBSTMT of STMT. */
299 #define RECHAIN_STMTS(stmt, substmt) \
300 do { \
301 substmt = TREE_CHAIN (stmt); \
302 TREE_CHAIN (stmt) = NULL_TREE; \
303 last_tree = stmt; \
304 } while (0)
306 /* Language-specific hooks. */
308 extern int (*lang_statement_code_p) PARAMS ((enum tree_code));
309 extern void (*lang_expand_stmt) PARAMS ((tree));
310 extern void (*lang_expand_decl_stmt) PARAMS ((tree));
311 extern void (*lang_expand_function_end) PARAMS ((void));
312 extern tree gettags PARAMS ((void));
314 /* Callback that determines if it's ok for a function to have no
315 noreturn attribute. */
316 extern int (*lang_missing_noreturn_ok_p) PARAMS ((tree));
318 extern int yyparse PARAMS ((void));
319 extern void free_parser_stacks PARAMS ((void));
321 extern stmt_tree current_stmt_tree PARAMS ((void));
322 extern tree *current_scope_stmt_stack PARAMS ((void));
323 extern void begin_stmt_tree PARAMS ((tree *));
324 extern tree add_stmt PARAMS ((tree));
325 extern void add_decl_stmt PARAMS ((tree));
326 extern tree add_scope_stmt PARAMS ((int, int));
327 extern void finish_stmt_tree PARAMS ((tree *));
329 extern int statement_code_p PARAMS ((enum tree_code));
330 extern tree walk_stmt_tree PARAMS ((tree *,
331 walk_tree_fn,
332 void *));
333 extern void prep_stmt PARAMS ((tree));
334 extern void expand_stmt PARAMS ((tree));
335 extern void shadow_warning PARAMS ((const char *,
336 tree, tree));
337 extern tree c_begin_if_stmt PARAMS ((void));
338 extern tree c_begin_while_stmt PARAMS ((void));
339 extern void c_finish_while_stmt_cond PARAMS ((tree, tree));
342 /* Extra information associated with a DECL. Other C dialects extend
343 this structure in various ways. The C front-end only uses this
344 structure for FUNCTION_DECLs; all other DECLs have a NULL
345 DECL_LANG_SPECIFIC field. */
347 struct c_lang_decl GTY(()) {
348 unsigned declared_inline : 1;
351 /* In a FUNCTION_DECL for which DECL_BUILT_IN does not hold, this is
352 the approximate number of statements in this function. There is
353 no need for this number to be exact; it is only used in various
354 heuristics regarding optimization. */
355 #define DECL_NUM_STMTS(NODE) \
356 (FUNCTION_DECL_CHECK (NODE)->decl.u1.i)
358 /* The variant of the C language being processed. Each C language
359 front-end defines this variable. */
361 extern c_language_kind c_language;
363 /* Nonzero if we can read a PCH file now. */
365 extern int allow_pch;
367 /* Switches common to the C front ends. */
369 /* Nonzero if prepreprocessing only. */
371 extern int flag_preprocess_only;
373 /* The file name to which we should write a precompiled header, or
374 NULL if no header will be written in this compile. */
376 extern const char *pch_file;
378 /* Nonzero if an ISO standard was selected. It rejects macros in the
379 user's namespace. */
381 extern int flag_iso;
383 /* Nonzero whenever Objective-C functionality is being used. */
384 extern int flag_objc;
386 /* Nonzero if -undef was given. It suppresses target built-in macros
387 and assertions. */
389 extern int flag_undef;
391 /* Nonzero means don't recognize the non-ANSI builtin functions. */
393 extern int flag_no_builtin;
395 /* Nonzero means don't recognize the non-ANSI builtin functions.
396 -ansi sets this. */
398 extern int flag_no_nonansi_builtin;
400 /* Nonzero means give `double' the same size as `float'. */
402 extern int flag_short_double;
404 /* Nonzero means give `wchar_t' the same size as `short'. */
406 extern int flag_short_wchar;
408 /* Nonzero means allow Microsoft extensions without warnings or errors. */
409 extern int flag_ms_extensions;
411 /* Nonzero means don't recognize the keyword `asm'. */
413 extern int flag_no_asm;
415 /* Nonzero means give string constants the type `const char *', as mandated
416 by the standard. */
418 extern int flag_const_strings;
420 /* Nonzero means `$' can be in an identifier. */
422 extern int dollars_in_ident;
424 /* Nonzero means to treat bitfields as signed unless they say `unsigned'. */
426 extern int flag_signed_bitfields;
427 extern int explicit_flag_signed_bitfields;
429 /* Nonzero means warn about pointer casts that can drop a type qualifier
430 from the pointer target type. */
432 extern int warn_cast_qual;
434 /* Warn about functions which might be candidates for format attributes. */
436 extern int warn_missing_format_attribute;
438 /* Nonzero means warn about sizeof(function) or addition/subtraction
439 of function pointers. */
441 extern int warn_pointer_arith;
443 /* Nonzero means warn for any global function def
444 without separate previous prototype decl. */
446 extern int warn_missing_prototypes;
448 /* Warn if adding () is suggested. */
450 extern int warn_parentheses;
452 /* Warn if initializer is not completely bracketed. */
454 extern int warn_missing_braces;
456 /* Warn about comparison of signed and unsigned values.
457 If -1, neither -Wsign-compare nor -Wno-sign-compare has been specified. */
459 extern int warn_sign_compare;
461 /* Nonzero means warn about usage of long long when `-pedantic'. */
463 extern int warn_long_long;
465 /* Nonzero means warn about deprecated conversion from string constant to
466 `char *'. */
468 extern int warn_write_strings;
470 /* Nonzero means warn about multiple (redundant) decls for the same single
471 variable or function. */
473 extern int warn_redundant_decls;
475 /* Warn about testing equality of floating point numbers. */
477 extern int warn_float_equal;
479 /* Warn about a subscript that has type char. */
481 extern int warn_char_subscripts;
483 /* Warn if a type conversion is done that might have confusing results. */
485 extern int warn_conversion;
487 /* Warn about #pragma directives that are not recognized. */
489 extern int warn_unknown_pragmas; /* Tri state variable. */
491 /* Warn about format/argument anomalies in calls to formatted I/O functions
492 (*printf, *scanf, strftime, strfmon, etc.). */
494 extern int warn_format;
496 /* Warn about Y2K problems with strftime formats. */
498 extern int warn_format_y2k;
500 /* Warn about excess arguments to formats. */
502 extern int warn_format_extra_args;
504 /* Warn about zero-length formats. */
506 extern int warn_format_zero_length;
508 /* Warn about non-literal format arguments. */
510 extern int warn_format_nonliteral;
512 /* Warn about possible security problems with calls to format functions. */
514 extern int warn_format_security;
517 /* C/ObjC language option variables. */
520 /* Nonzero means message about use of implicit function declarations;
521 1 means warning; 2 means error. */
523 extern int mesg_implicit_function_declaration;
525 /* Nonzero means allow type mismatches in conditional expressions;
526 just make their values `void'. */
528 extern int flag_cond_mismatch;
530 /* Nonzero means enable C89 Amendment 1 features. */
532 extern int flag_isoc94;
534 /* Nonzero means use the ISO C99 dialect of C. */
536 extern int flag_isoc99;
538 /* Nonzero means that we have builtin functions, and main is an int */
540 extern int flag_hosted;
542 /* Nonzero means add default format_arg attributes for functions not
543 in ISO C. */
545 extern int flag_noniso_default_format_attributes;
547 /* Nonzero means warn when casting a function call to a type that does
548 not match the return type (e.g. (float)sqrt() or (anything*)malloc()
549 when there is no previous declaration of sqrt or malloc. */
551 extern int warn_bad_function_cast;
553 /* Warn about traditional constructs whose meanings changed in ANSI C. */
555 extern int warn_traditional;
557 /* Nonzero means warn for non-prototype function decls
558 or non-prototyped defs without previous prototype. */
560 extern int warn_strict_prototypes;
562 /* Nonzero means warn for any global function def
563 without separate previous decl. */
565 extern int warn_missing_declarations;
567 /* Nonzero means warn about extern declarations of objects not at
568 file-scope level and about *all* declarations of functions (whether
569 extern or static) not at file-scope level. Note that we exclude
570 implicit function declarations. To get warnings about those, use
571 -Wimplicit. */
573 extern int warn_nested_externs;
575 /* Warn if main is suspicious. */
577 extern int warn_main;
579 /* Nonzero means warn about possible violations of sequence point rules. */
581 extern int warn_sequence_point;
583 /* Nonzero means to warn about compile-time division by zero. */
584 extern int warn_div_by_zero;
586 /* Nonzero means warn about use of implicit int. */
588 extern int warn_implicit_int;
590 /* Warn about NULL being passed to argument slots marked as requiring
591 non-NULL. */
593 extern int warn_nonnull;
596 /* ObjC language option variables. */
599 /* Open and close the file for outputting class declarations, if
600 requested (ObjC). */
602 extern int flag_gen_declaration;
604 /* Generate code for GNU or NeXT runtime environment. */
606 extern int flag_next_runtime;
608 /* Tells the compiler that this is a special run. Do not perform any
609 compiling, instead we are to test some platform dependent features
610 and output a C header file with appropriate definitions. */
612 extern int print_struct_values;
614 /* ???. Undocumented. */
616 extern const char *constant_string_class_name;
618 /* Warn if multiple methods are seen for the same selector, but with
619 different argument types. Performs the check on the whole selector
620 table at the end of compilation. */
622 extern int warn_selector;
624 /* Warn if a @selector() is found, and no method with that selector
625 has been previously declared. The check is done on each
626 @selector() as soon as it is found - so it warns about forward
627 declarations. */
629 extern int warn_undeclared_selector;
631 /* Warn if methods required by a protocol are not implemented in the
632 class adopting it. When turned off, methods inherited to that
633 class are also considered implemented. */
635 extern int warn_protocol;
638 /* C++ language option variables. */
641 /* Nonzero means don't recognize any extension keywords. */
643 extern int flag_no_gnu_keywords;
645 /* Nonzero means do emit exported implementations of functions even if
646 they can be inlined. */
648 extern int flag_implement_inlines;
650 /* Nonzero means do emit exported implementations of templates, instead of
651 multiple static copies in each file that needs a definition. */
653 extern int flag_external_templates;
655 /* Nonzero means that the decision to emit or not emit the implementation of a
656 template depends on where the template is instantiated, rather than where
657 it is defined. */
659 extern int flag_alt_external_templates;
661 /* Nonzero means that implicit instantiations will be emitted if needed. */
663 extern int flag_implicit_templates;
665 /* Nonzero means that implicit instantiations of inline templates will be
666 emitted if needed, even if instantiations of non-inline templates
667 aren't. */
669 extern int flag_implicit_inline_templates;
671 /* Nonzero means generate separate instantiation control files and
672 juggle them at link time. */
674 extern int flag_use_repository;
676 /* Nonzero if we want to issue diagnostics that the standard says are not
677 required. */
679 extern int flag_optional_diags;
681 /* Nonzero means we should attempt to elide constructors when possible. */
683 extern int flag_elide_constructors;
685 /* Nonzero means that member functions defined in class scope are
686 inline by default. */
688 extern int flag_default_inline;
690 /* Controls whether compiler generates 'type descriptor' that give
691 run-time type information. */
693 extern int flag_rtti;
695 /* Nonzero if we want to conserve space in the .o files. We do this
696 by putting uninitialized data and runtime initialized data into
697 .common instead of .data at the expense of not flagging multiple
698 definitions. */
700 extern int flag_conserve_space;
702 /* Nonzero if we want to obey access control semantics. */
704 extern int flag_access_control;
706 /* Nonzero if we want to check the return value of new and avoid calling
707 constructors if it is a null pointer. */
709 extern int flag_check_new;
711 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
712 initialization variables.
713 0: Old rules, set by -fno-for-scope.
714 2: New ISO rules, set by -ffor-scope.
715 1: Try to implement new ISO rules, but with backup compatibility
716 (and warnings). This is the default, for now. */
718 extern int flag_new_for_scope;
720 /* Nonzero if we want to emit defined symbols with common-like linkage as
721 weak symbols where possible, in order to conform to C++ semantics.
722 Otherwise, emit them as local symbols. */
724 extern int flag_weak;
726 /* Nonzero to use __cxa_atexit, rather than atexit, to register
727 destructors for local statics and global objects. */
729 extern int flag_use_cxa_atexit;
731 /* Nonzero means output .vtable_{entry,inherit} for use in doing vtable gc. */
733 extern int flag_vtable_gc;
735 /* Nonzero means make the default pedwarns warnings instead of errors.
736 The value of this flag is ignored if -pedantic is specified. */
738 extern int flag_permissive;
740 /* Nonzero means to implement standard semantics for exception
741 specifications, calling unexpected if an exception is thrown that
742 doesn't match the specification. Zero means to treat them as
743 assertions and optimize accordingly, but not check them. */
745 extern int flag_enforce_eh_specs;
747 /* The version of the C++ ABI in use. The following values are
748 allowed:
750 0: The version of the ABI believed most conformant with the
751 C++ ABI specification. This ABI may change as bugs are
752 discovered and fixed. Therefore, 0 will not necessarily
753 indicate the same ABI in different versions of G++.
755 1: The version of the ABI first used in G++ 3.2.
757 Additional positive integers will be assigned as new versions of
758 the ABI become the default version of the ABI. */
760 extern int flag_abi_version;
762 /* Nonzero means warn about things that will change when compiling
763 with an ABI-compliant compiler. */
765 extern int warn_abi;
767 /* Nonzero means warn about implicit declarations. */
769 extern int warn_implicit;
771 /* Nonzero means warn when all ctors or dtors are private, and the class
772 has no friends. */
774 extern int warn_ctor_dtor_privacy;
776 /* Nonzero means warn in function declared in derived class has the
777 same name as a virtual in the base class, but fails to match the
778 type signature of any virtual function in the base class. */
780 extern int warn_overloaded_virtual;
782 /* Nonzero means warn when declaring a class that has a non virtual
783 destructor, when it really ought to have a virtual one. */
785 extern int warn_nonvdtor;
787 /* Nonzero means warn when the compiler will reorder code. */
789 extern int warn_reorder;
791 /* Nonzero means warn when synthesis behavior differs from Cfront's. */
793 extern int warn_synth;
795 /* Nonzero means warn when we convert a pointer to member function
796 into a pointer to (void or function). */
798 extern int warn_pmf2ptr;
800 /* Nonzero means warn about violation of some Effective C++ style rules. */
802 extern int warn_ecpp;
804 /* Nonzero means warn where overload resolution chooses a promotion from
805 unsigned to signed over a conversion to an unsigned of the same size. */
807 extern int warn_sign_promo;
809 /* Nonzero means warn when an old-style cast is used. */
811 extern int warn_old_style_cast;
813 /* Nonzero means warn when non-templatized friend functions are
814 declared within a template */
816 extern int warn_nontemplate_friend;
818 /* Nonzero means complain about deprecated features. */
820 extern int warn_deprecated;
822 /* Maximum template instantiation depth. This limit is rather
823 arbitrary, but it exists to limit the time it takes to notice
824 infinite template instantiations. */
826 extern int max_tinst_depth;
828 /* Nonzero means the expression being parsed will never be evaluated.
829 This is a count, since unevaluated expressions can nest. */
831 extern int skip_evaluation;
833 /* C types are partitioned into three subsets: object, function, and
834 incomplete types. */
835 #define C_TYPE_OBJECT_P(type) \
836 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
838 #define C_TYPE_INCOMPLETE_P(type) \
839 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
841 #define C_TYPE_FUNCTION_P(type) \
842 (TREE_CODE (type) == FUNCTION_TYPE)
844 /* For convenience we define a single macro to identify the class of
845 object or incomplete types. */
846 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
847 (!C_TYPE_FUNCTION_P (type))
849 /* Record in each node resulting from a binary operator
850 what operator was specified for it. */
851 #define C_EXP_ORIGINAL_CODE(exp) ((enum tree_code) TREE_COMPLEXITY (exp))
853 /* Attribute table common to the C front ends. */
854 extern const struct attribute_spec c_common_attribute_table[];
855 extern const struct attribute_spec c_common_format_attribute_table[];
857 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
858 ID is the identifier to use, NAME is the string.
859 TYPE_DEP indicates whether it depends on type of the function or not
860 (i.e. __PRETTY_FUNCTION__). */
862 extern tree (*make_fname_decl) PARAMS ((tree, int));
864 extern tree identifier_global_value PARAMS ((tree));
865 extern void record_builtin_type PARAMS ((enum rid,
866 const char *, tree));
867 extern tree build_void_list_node PARAMS ((void));
868 extern void start_fname_decls PARAMS ((void));
869 extern void finish_fname_decls PARAMS ((void));
870 extern const char *fname_as_string PARAMS ((int));
871 extern tree fname_decl PARAMS ((unsigned, tree));
872 extern const char *fname_string PARAMS ((unsigned));
874 extern void check_function_arguments PARAMS ((tree, tree));
875 extern void check_function_arguments_recurse PARAMS ((void (*) (void *,
876 tree,
877 unsigned HOST_WIDE_INT),
878 void *, tree,
879 unsigned HOST_WIDE_INT));
880 extern void check_function_format PARAMS ((int *, tree, tree));
881 extern void set_Wformat PARAMS ((int));
882 extern tree handle_format_attribute PARAMS ((tree *, tree, tree,
883 int, bool *));
884 extern tree handle_format_arg_attribute PARAMS ((tree *, tree, tree,
885 int, bool *));
886 extern void c_common_insert_default_attributes PARAMS ((tree));
887 extern int c_common_decode_option PARAMS ((int, char **));
888 extern tree c_common_type_for_mode PARAMS ((enum machine_mode,
889 int));
890 extern tree c_common_type_for_size PARAMS ((unsigned int, int));
891 extern tree c_common_unsigned_type PARAMS ((tree));
892 extern tree c_common_signed_type PARAMS ((tree));
893 extern tree c_common_signed_or_unsigned_type PARAMS ((int, tree));
894 extern tree c_common_truthvalue_conversion PARAMS ((tree));
895 extern void c_apply_type_quals_to_decl PARAMS ((int, tree));
896 extern tree c_sizeof_or_alignof_type PARAMS ((tree, enum tree_code, int));
897 extern tree c_alignof_expr PARAMS ((tree));
898 /* Print an error message for invalid operands to arith operation CODE.
899 NOP_EXPR is used as a special case (see truthvalue_conversion). */
900 extern void binary_op_error PARAMS ((enum tree_code));
901 #define my_friendly_assert(EXP, N) (void) \
902 (((EXP) == 0) ? (fancy_abort (__FILE__, __LINE__, __FUNCTION__), 0) : 0)
904 extern tree c_expand_expr_stmt PARAMS ((tree));
905 extern void c_expand_start_cond PARAMS ((tree, int, tree));
906 extern void c_finish_then PARAMS ((void));
907 extern void c_expand_start_else PARAMS ((void));
908 extern void c_finish_else PARAMS ((void));
909 extern void c_expand_end_cond PARAMS ((void));
910 /* Validate the expression after `case' and apply default promotions. */
911 extern tree check_case_value PARAMS ((tree));
912 extern tree fix_string_type PARAMS ((tree));
913 struct varray_head_tag;
914 extern tree combine_strings PARAMS ((struct varray_head_tag *));
915 extern void constant_expression_warning PARAMS ((tree));
916 extern tree convert_and_check PARAMS ((tree, tree));
917 extern void overflow_warning PARAMS ((tree));
918 extern void unsigned_conversion_warning PARAMS ((tree, tree));
920 /* Read the rest of the current #-directive line. */
921 extern char *get_directive_line PARAMS ((void));
922 #define GET_DIRECTIVE_LINE() get_directive_line ()
923 #define c_sizeof(T) c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 1)
924 #define c_alignof(T) c_sizeof_or_alignof_type (T, ALIGNOF_EXPR, 1)
926 /* Subroutine of build_binary_op, used for comparison operations.
927 See if the operands have both been converted from subword integer types
928 and, if so, perhaps change them both back to their original type. */
929 extern tree shorten_compare PARAMS ((tree *, tree *, tree *, enum tree_code *));
931 extern tree pointer_int_sum PARAMS ((enum tree_code, tree, tree));
932 extern unsigned int min_precision PARAMS ((tree, int));
934 /* Add qualifiers to a type, in the fashion for C. */
935 extern tree c_build_qualified_type PARAMS ((tree, int));
937 /* Build tree nodes and builtin functions common to both C and C++ language
938 frontends. */
939 extern void c_common_nodes_and_builtins PARAMS ((void));
941 extern void disable_builtin_function PARAMS ((const char *));
943 extern tree build_va_arg PARAMS ((tree, tree));
945 extern void c_common_init_options PARAMS ((enum c_language_kind));
946 extern bool c_common_post_options PARAMS ((void));
947 extern const char *c_common_init PARAMS ((const char *));
948 extern void c_common_finish PARAMS ((void));
949 extern void c_common_parse_file PARAMS ((int));
950 extern HOST_WIDE_INT c_common_get_alias_set PARAMS ((tree));
951 extern bool c_promoting_integer_type_p PARAMS ((tree));
952 extern int self_promoting_args_p PARAMS ((tree));
953 extern tree strip_array_types PARAMS ((tree));
955 /* These macros provide convenient access to the various _STMT nodes. */
957 /* Nonzero if this statement should be considered a full-expression,
958 i.e., if temporaries created during this statement should have
959 their destructors run at the end of this statement. (In C, this
960 will always be false, since there are no destructors.) */
961 #define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
963 /* IF_STMT accessors. These give access to the condition of the if
964 statement, the then block of the if statement, and the else block
965 of the if statement if it exists. */
966 #define IF_COND(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 0)
967 #define THEN_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 1)
968 #define ELSE_CLAUSE(NODE) TREE_OPERAND (IF_STMT_CHECK (NODE), 2)
970 /* WHILE_STMT accessors. These give access to the condition of the
971 while statement and the body of the while statement, respectively. */
972 #define WHILE_COND(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
973 #define WHILE_BODY(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
975 /* DO_STMT accessors. These give access to the condition of the do
976 statement and the body of the do statement, respectively. */
977 #define DO_COND(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
978 #define DO_BODY(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
980 /* RETURN_STMT accessors. These give the expression associated with a
981 return statement, and whether it should be ignored when expanding
982 (as opposed to inlining). */
983 #define RETURN_STMT_EXPR(NODE) TREE_OPERAND (RETURN_STMT_CHECK (NODE), 0)
985 /* EXPR_STMT accessor. This gives the expression associated with an
986 expression statement. */
987 #define EXPR_STMT_EXPR(NODE) TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
989 /* FOR_STMT accessors. These give access to the init statement,
990 condition, update expression, and body of the for statement,
991 respectively. */
992 #define FOR_INIT_STMT(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
993 #define FOR_COND(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
994 #define FOR_EXPR(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
995 #define FOR_BODY(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
997 /* SWITCH_STMT accessors. These give access to the condition, body and
998 original condition type (before any compiler conversions)
999 of the switch statement, respectively. */
1000 #define SWITCH_COND(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 0)
1001 #define SWITCH_BODY(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 1)
1002 #define SWITCH_TYPE(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 2)
1004 /* CASE_LABEL accessors. These give access to the high and low values
1005 of a case label, respectively. */
1006 #define CASE_LOW(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 0)
1007 #define CASE_HIGH(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 1)
1008 #define CASE_LABEL_DECL(NODE) TREE_OPERAND (CASE_LABEL_CHECK (NODE), 2)
1010 /* GOTO_STMT accessor. This gives access to the label associated with
1011 a goto statement. */
1012 #define GOTO_DESTINATION(NODE) TREE_OPERAND (GOTO_STMT_CHECK (NODE), 0)
1013 /* True for goto created artificially by the compiler. */
1014 #define GOTO_FAKE_P(NODE) (TREE_LANG_FLAG_0 (GOTO_STMT_CHECK (NODE)))
1016 /* COMPOUND_STMT accessor. This gives access to the TREE_LIST of
1017 statements associated with a compound statement. The result is the
1018 first statement in the list. Succeeding nodes can be accessed by
1019 calling TREE_CHAIN on a node in the list. */
1020 #define COMPOUND_BODY(NODE) TREE_OPERAND (COMPOUND_STMT_CHECK (NODE), 0)
1022 /* ASM_STMT accessors. ASM_STRING returns a STRING_CST for the
1023 instruction (e.g., "mov x, y"). ASM_OUTPUTS, ASM_INPUTS, and
1024 ASM_CLOBBERS represent the outputs, inputs, and clobbers for the
1025 statement. */
1026 #define ASM_CV_QUAL(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 0)
1027 #define ASM_STRING(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 1)
1028 #define ASM_OUTPUTS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 2)
1029 #define ASM_INPUTS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 3)
1030 #define ASM_CLOBBERS(NODE) TREE_OPERAND (ASM_STMT_CHECK (NODE), 4)
1032 /* DECL_STMT accessor. This gives access to the DECL associated with
1033 the given declaration statement. */
1034 #define DECL_STMT_DECL(NODE) TREE_OPERAND (DECL_STMT_CHECK (NODE), 0)
1036 /* STMT_EXPR accessor. */
1037 #define STMT_EXPR_STMT(NODE) TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
1039 /* Nonzero if this statement-expression does not have an associated scope. */
1040 #define STMT_EXPR_NO_SCOPE(NODE) \
1041 TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))
1043 /* LABEL_STMT accessor. This gives access to the label associated with
1044 the given label statement. */
1045 #define LABEL_STMT_LABEL(NODE) TREE_OPERAND (LABEL_STMT_CHECK (NODE), 0)
1047 /* COMPOUND_LITERAL_EXPR accessors. */
1048 #define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \
1049 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
1050 #define COMPOUND_LITERAL_EXPR_DECL(NODE) \
1051 DECL_STMT_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
1053 /* Nonzero if this SCOPE_STMT is for the beginning of a scope. */
1054 #define SCOPE_BEGIN_P(NODE) \
1055 (TREE_LANG_FLAG_0 (SCOPE_STMT_CHECK (NODE)))
1057 /* Nonzero if this SCOPE_STMT is for the end of a scope. */
1058 #define SCOPE_END_P(NODE) \
1059 (!SCOPE_BEGIN_P (SCOPE_STMT_CHECK (NODE)))
1061 /* The BLOCK containing the declarations contained in this scope. */
1062 #define SCOPE_STMT_BLOCK(NODE) \
1063 (TREE_OPERAND (SCOPE_STMT_CHECK (NODE), 0))
1065 /* Nonzero for a SCOPE_STMT if there were no variables in this scope. */
1066 #define SCOPE_NULLIFIED_P(NODE) \
1067 (SCOPE_STMT_BLOCK ((NODE)) == NULL_TREE)
1069 /* Nonzero for a SCOPE_STMT which represents a lexical scope, but
1070 which should be treated as non-existent from the point of view of
1071 running cleanup actions. */
1072 #define SCOPE_NO_CLEANUPS_P(NODE) \
1073 (TREE_LANG_FLAG_3 (SCOPE_STMT_CHECK (NODE)))
1075 /* Nonzero for a SCOPE_STMT if this statement is for a partial scope.
1076 For example, in:
1078 S s;
1080 S s2;
1081 goto l;
1083 there is (implicitly) a new scope after `l', even though there are
1084 no curly braces. In particular, when we hit the goto, we must
1085 destroy s2 and then re-construct it. For the implicit scope,
1086 SCOPE_PARTIAL_P will be set. */
1087 #define SCOPE_PARTIAL_P(NODE) \
1088 (TREE_LANG_FLAG_4 (SCOPE_STMT_CHECK (NODE)))
1090 /* Nonzero for an ASM_STMT if the assembly statement is volatile. */
1091 #define ASM_VOLATILE_P(NODE) \
1092 (ASM_CV_QUAL (ASM_STMT_CHECK (NODE)) != NULL_TREE)
1094 /* The VAR_DECL to clean up in a CLEANUP_STMT. */
1095 #define CLEANUP_DECL(NODE) \
1096 TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 0)
1097 /* The cleanup to run in a CLEANUP_STMT. */
1098 #define CLEANUP_EXPR(NODE) \
1099 TREE_OPERAND (CLEANUP_STMT_CHECK (NODE), 1)
1101 /* The filename we are changing to as of this FILE_STMT. */
1102 #define FILE_STMT_FILENAME_NODE(NODE) \
1103 (TREE_OPERAND (FILE_STMT_CHECK (NODE), 0))
1104 #define FILE_STMT_FILENAME(NODE) \
1105 (IDENTIFIER_POINTER (FILE_STMT_FILENAME_NODE (NODE)))
1107 /* The line-number at which a statement began. But if
1108 STMT_LINENO_FOR_FN_P does holds, then this macro gives the
1109 line number for the end of the current function instead. */
1110 #define STMT_LINENO(NODE) \
1111 (TREE_COMPLEXITY ((NODE)))
1113 /* If nonzero, the STMT_LINENO for NODE is the line at which the
1114 function ended. */
1115 #define STMT_LINENO_FOR_FN_P(NODE) \
1116 (TREE_LANG_FLAG_2 ((NODE)))
1118 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
1119 initialization variables. */
1120 #define NEW_FOR_SCOPE_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1122 /* Nonzero if we want to create an ASM_INPUT instead of an
1123 ASM_OPERAND with no operands. */
1124 #define ASM_INPUT_P(NODE) (TREE_LANG_FLAG_0 (NODE))
1126 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
1128 enum c_tree_code {
1129 C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
1130 #include "c-common.def"
1131 LAST_C_TREE_CODE
1134 #undef DEFTREECODE
1136 extern void genrtl_do_pushlevel PARAMS ((void));
1137 extern void genrtl_goto_stmt PARAMS ((tree));
1138 extern void genrtl_expr_stmt PARAMS ((tree));
1139 extern void genrtl_expr_stmt_value PARAMS ((tree, int, int));
1140 extern void genrtl_decl_stmt PARAMS ((tree));
1141 extern void genrtl_if_stmt PARAMS ((tree));
1142 extern void genrtl_while_stmt PARAMS ((tree));
1143 extern void genrtl_do_stmt PARAMS ((tree));
1144 extern void genrtl_return_stmt PARAMS ((tree));
1145 extern void genrtl_for_stmt PARAMS ((tree));
1146 extern void genrtl_break_stmt PARAMS ((void));
1147 extern void genrtl_continue_stmt PARAMS ((void));
1148 extern void genrtl_scope_stmt PARAMS ((tree));
1149 extern void genrtl_switch_stmt PARAMS ((tree));
1150 extern void genrtl_case_label PARAMS ((tree));
1151 extern void genrtl_compound_stmt PARAMS ((tree));
1152 extern void genrtl_asm_stmt PARAMS ((tree, tree,
1153 tree, tree,
1154 tree, int));
1155 extern void genrtl_decl_cleanup PARAMS ((tree));
1156 extern int stmts_are_full_exprs_p PARAMS ((void));
1157 extern int anon_aggr_type_p PARAMS ((tree));
1159 /* For a VAR_DECL that is an anonymous union, these are the various
1160 sub-variables that make up the anonymous union. */
1161 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
1163 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
1164 #define DECL_C_BIT_FIELD(NODE) \
1165 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
1166 #define SET_DECL_C_BIT_FIELD(NODE) \
1167 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
1168 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
1169 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
1171 /* In a VAR_DECL, nonzero if the decl is a register variable with
1172 an explicit asm specification. */
1173 #define DECL_C_HARD_REGISTER(DECL) DECL_LANG_FLAG_4 (VAR_DECL_CHECK (DECL))
1175 extern void emit_local_var PARAMS ((tree));
1176 extern void make_rtl_for_local_static PARAMS ((tree));
1177 extern tree expand_cond PARAMS ((tree));
1178 extern tree c_expand_return PARAMS ((tree));
1179 extern tree do_case PARAMS ((tree, tree));
1180 extern tree build_stmt PARAMS ((enum tree_code, ...));
1181 extern tree build_case_label PARAMS ((tree, tree, tree));
1182 extern tree build_continue_stmt PARAMS ((void));
1183 extern tree build_break_stmt PARAMS ((void));
1184 extern tree build_return_stmt PARAMS ((tree));
1186 #define COMPOUND_STMT_NO_SCOPE(NODE) TREE_LANG_FLAG_0 (NODE)
1188 /* Used by the C++ frontend to mark the block around the member
1189 initializers and cleanups. */
1190 #define COMPOUND_STMT_BODY_BLOCK(NODE) TREE_LANG_FLAG_3 (NODE)
1192 extern void c_expand_asm_operands PARAMS ((tree, tree, tree, tree, int, const char *, int));
1194 /* These functions must be defined by each front-end which implements
1195 a variant of the C language. They are used in c-common.c. */
1197 extern tree build_unary_op PARAMS ((enum tree_code,
1198 tree, int));
1199 extern tree build_binary_op PARAMS ((enum tree_code,
1200 tree, tree, int));
1201 extern int lvalue_p PARAMS ((tree));
1202 extern tree default_conversion PARAMS ((tree));
1204 /* Given two integer or real types, return the type for their sum.
1205 Given two compatible ANSI C types, returns the merged type. */
1207 extern tree common_type PARAMS ((tree, tree));
1209 extern tree expand_tree_builtin PARAMS ((tree, tree, tree));
1211 extern tree decl_constant_value PARAMS ((tree));
1213 /* Handle increment and decrement of boolean types. */
1214 extern tree boolean_increment PARAMS ((enum tree_code,
1215 tree));
1217 /* Hook currently used only by the C++ front end to reset internal state
1218 after entering or leaving a header file. */
1219 extern void extract_interface_info PARAMS ((void));
1221 extern int case_compare PARAMS ((splay_tree_key,
1222 splay_tree_key));
1224 extern tree c_add_case_label PARAMS ((splay_tree,
1225 tree, tree,
1226 tree));
1228 extern tree build_function_call PARAMS ((tree, tree));
1230 extern tree finish_label_address_expr PARAMS ((tree));
1232 /* Same function prototype, but the C and C++ front ends have
1233 different implementations. Used in c-common.c. */
1234 extern tree lookup_label PARAMS ((tree));
1236 extern rtx c_expand_expr PARAMS ((tree, rtx,
1237 enum machine_mode,
1238 int));
1240 extern int c_safe_from_p PARAMS ((rtx, tree));
1242 extern int c_staticp PARAMS ((tree));
1244 extern int c_common_unsafe_for_reeval PARAMS ((tree));
1246 extern const char *init_c_lex PARAMS ((const char *));
1248 extern void cb_register_builtins PARAMS ((cpp_reader *));
1250 /* Positive if an implicit `extern "C"' scope has just been entered;
1251 negative if such a scope has just been exited. */
1252 extern int pending_lang_change;
1254 /* Information recorded about each file examined during compilation. */
1256 struct c_fileinfo
1258 int time; /* Time spent in the file. */
1259 short interface_only; /* Flags - used only by C++ */
1260 short interface_unknown;
1263 struct c_fileinfo *get_fileinfo PARAMS ((const char *));
1264 extern void dump_time_statistics PARAMS ((void));
1266 extern int c_dump_tree PARAMS ((void *, tree));
1268 extern void pch_init PARAMS ((void));
1269 extern int c_common_valid_pch PARAMS ((cpp_reader *pfile,
1270 const char *name,
1271 int fd));
1272 extern void c_common_read_pch PARAMS ((cpp_reader *pfile,
1273 const char *name,
1274 int fd,
1275 const char *orig));
1276 extern void c_common_write_pch PARAMS ((void));
1278 #endif /* ! GCC_C_COMMON_H */