1 /* Definitions for c-common.c.
2 Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004, 2005 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, 51 Franklin Street, Fifth Floor, 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: TREE_NEGATED_INT (in INTEGER_CST).
31 IDENTIFIER_MARKED (used by search routines).
32 DECL_PRETTY_FUNCTION_P (in VAR_DECL)
33 1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
34 STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
36 3: STATEMENT_LIST_HAS_LABEL (in STATEMENT_LIST)
40 /* Reserved identifiers. This is the union of all the keywords for C,
41 C++, and Objective-C. All the type modifiers have to be in one
42 block at the beginning, because they are used as mask bits. There
43 are 27 type modifiers; if we add many more we will have to redesign
44 the mask mechanism. */
49 /* C, in empirical order of frequency. */
51 RID_UNSIGNED, RID_LONG, RID_CONST, RID_EXTERN,
52 RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
53 RID_VOLATILE, RID_SIGNED, RID_AUTO, RID_RESTRICT,
56 RID_COMPLEX, RID_THREAD,
59 RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
62 RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
65 RID_INT, RID_CHAR, RID_FLOAT, RID_DOUBLE, RID_VOID,
66 RID_ENUM, RID_STRUCT, RID_UNION, RID_IF, RID_ELSE,
67 RID_WHILE, RID_DO, RID_FOR, RID_SWITCH, RID_CASE,
68 RID_DEFAULT, RID_BREAK, RID_CONTINUE, RID_RETURN, RID_GOTO,
72 RID_ASM, RID_TYPEOF, RID_ALIGNOF, RID_ATTRIBUTE, RID_VA_ARG,
73 RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL, RID_CHOOSE_EXPR,
74 RID_TYPES_COMPATIBLE_P,
75 RID_DFLOAT32, RID_DFLOAT64, RID_DFLOAT128,
77 /* Too many ways of getting the name of a function as a string */
78 RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
81 RID_BOOL, RID_WCHAR, RID_CLASS,
82 RID_PUBLIC, RID_PRIVATE, RID_PROTECTED,
83 RID_TEMPLATE, RID_NULL, RID_CATCH,
84 RID_DELETE, RID_FALSE, RID_NAMESPACE,
85 RID_NEW, RID_OFFSETOF, RID_OPERATOR,
86 RID_THIS, RID_THROW, RID_TRUE,
87 RID_TRY, RID_TYPENAME, RID_TYPEID,
91 RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
97 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,
101 RID_AT_THROW, RID_AT_TRY, RID_AT_CATCH,
102 RID_AT_FINALLY, RID_AT_SYNCHRONIZED,
104 RID_AT_IMPLEMENTATION,
108 RID_FIRST_MODIFIER = RID_STATIC,
109 RID_LAST_MODIFIER = RID_ONEWAY,
111 RID_FIRST_AT = RID_AT_ENCODE,
112 RID_LAST_AT = RID_AT_IMPLEMENTATION,
113 RID_FIRST_PQ = RID_IN,
114 RID_LAST_PQ = RID_ONEWAY
117 #define OBJC_IS_AT_KEYWORD(rid) \
118 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
119 (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
121 #define OBJC_IS_PQ_KEYWORD(rid) \
122 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
123 (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
125 /* The elements of `ridpointers' are identifier nodes for the reserved
126 type names and storage classes. It is indexed by a RID_... value. */
127 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
129 /* Standard named or nameless data types of the C compiler. */
134 CTI_SIGNED_WCHAR_TYPE,
135 CTI_UNSIGNED_WCHAR_TYPE,
137 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
138 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
141 CTI_WIDEST_INT_LIT_TYPE,
142 CTI_WIDEST_UINT_LIT_TYPE,
145 CTI_WCHAR_ARRAY_TYPE,
148 CTI_CONST_STRING_TYPE,
150 /* Type for boolean expressions (bool in C++, int in C). */
153 CTI_TRUTHVALUE_FALSE,
155 CTI_DEFAULT_FUNCTION_TYPE,
157 /* These are not types, but we have to look them up all the time. */
158 CTI_FUNCTION_NAME_DECL,
159 CTI_PRETTY_FUNCTION_NAME_DECL,
160 CTI_C99_FUNCTION_NAME_DECL,
161 CTI_SAVED_FUNCTION_NAME_DECLS,
170 #define C_RID_CODE(id) (((struct c_common_identifier *) (id))->node.rid_code)
172 /* Identifier part common to the C front ends. Inherits from
173 tree_identifier, despite appearances. */
174 struct c_common_identifier GTY(())
176 struct tree_common common;
177 struct cpp_hashnode node;
180 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
181 #define signed_wchar_type_node c_global_trees[CTI_SIGNED_WCHAR_TYPE]
182 #define unsigned_wchar_type_node c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
183 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
184 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
185 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
186 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
187 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
188 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
189 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
191 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
192 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
193 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
195 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
196 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
197 #define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
198 #define string_type_node c_global_trees[CTI_STRING_TYPE]
199 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
201 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
203 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
204 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
205 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
206 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
208 /* A node for `((void) 0)'. */
209 #define void_zero_node c_global_trees[CTI_VOID_ZERO]
211 /* The node for C++ `__null'. */
212 #define null_node c_global_trees[CTI_NULL]
214 extern GTY(()) tree c_global_trees[CTI_MAX];
216 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
217 tree for size reasons. */
218 struct sorted_fields_type GTY(())
221 tree GTY((length ("%h.len"))) elts[1];
224 /* Mark which labels are explicitly declared.
225 These may be shadowed, and may be referenced from nested functions. */
226 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
228 typedef enum c_language_kind
230 clk_c = 0, /* C90, C94 or C99 */
231 clk_objc = 1, /* clk_c with ObjC features. */
232 clk_cxx = 2, /* ANSI/ISO C++ */
233 clk_objcxx = 3 /* clk_cxx with ObjC features. */
237 /* To test for a specific language use c_language, defined by each
238 front end. For "ObjC features" or "not C++" use the macros. */
239 extern c_language_kind c_language;
241 #define c_dialect_cxx() (c_language & clk_cxx)
242 #define c_dialect_objc() (c_language & clk_objc)
244 /* Information about a statement tree. */
246 struct stmt_tree_s GTY(()) {
247 /* The current statement list being collected. */
248 tree x_cur_stmt_list;
250 /* In C++, Nonzero if we should treat statements as full
251 expressions. In particular, this variable is no-zero if at the
252 end of a statement we should destroy any temporaries created
253 during that statement. Similarly, if, at the end of a block, we
254 should destroy any local variables in this block. Normally, this
255 variable is nonzero, since those are the normal semantics of
258 However, in order to represent aggregate initialization code as
259 tree structure, we use statement-expressions. The statements
260 within the statement expression should not result in cleanups
261 being run until the entire enclosing statement is complete.
263 This flag has no effect in C. */
264 int stmts_are_full_exprs_p;
267 typedef struct stmt_tree_s *stmt_tree;
269 /* Global state pertinent to the current function. Some C dialects
270 extend this structure with additional fields. */
272 struct c_language_function GTY(()) {
273 /* While we are parsing the function, this contains information
274 about the statement-tree that we are building. */
275 struct stmt_tree_s x_stmt_tree;
278 /* When building a statement-tree, this is the current statement list
279 being collected. It's TREE_CHAIN is a back-pointer to the previous
282 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
284 /* Language-specific hooks. */
286 /* Callback that determines if it's ok for a function to have no
287 noreturn attribute. */
288 extern int (*lang_missing_noreturn_ok_p) (tree);
290 /* If non-NULL, this function is called after a precompile header file
292 extern void (*lang_post_pch_load) (void);
294 extern void push_file_scope (void);
295 extern void pop_file_scope (void);
296 extern stmt_tree current_stmt_tree (void);
297 extern tree push_stmt_list (void);
298 extern tree pop_stmt_list (tree);
299 extern tree add_stmt (tree);
300 extern void push_cleanup (tree, tree, bool);
301 extern tree pushdecl_top_level (tree);
302 extern tree pushdecl (tree);
303 extern tree build_modify_expr (tree, enum tree_code, tree);
304 extern tree build_indirect_ref (tree, const char *);
306 extern int c_expand_decl (tree);
308 extern int field_decl_cmp (const void *, const void *);
309 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
311 extern bool has_c_linkage (tree decl);
313 /* Switches common to the C front ends. */
315 /* Nonzero if prepreprocessing only. */
317 extern int flag_preprocess_only;
319 /* Zero means that faster, ...NonNil variants of objc_msgSend...
320 calls will be used in ObjC; passing nil receivers to such calls
321 will most likely result in crashes. */
322 extern int flag_nil_receivers;
324 /* Nonzero means that we will allow new ObjC exception syntax (@throw,
325 @try, etc.) in source code. */
326 extern int flag_objc_exceptions;
328 /* Nonzero means that we generate NeXT setjmp based exceptions. */
329 extern int flag_objc_sjlj_exceptions;
331 /* Nonzero means that code generation will be altered to support
332 "zero-link" execution. This currently affects ObjC only, but may
333 affect other languages in the future. */
334 extern int flag_zero_link;
336 /* Nonzero means emit an '__OBJC, __image_info' for the current translation
337 unit. It will inform the ObjC runtime that class definition(s) herein
338 contained are to replace one(s) previously loaded. */
339 extern int flag_replace_objc_classes;
341 /* Nonzero means don't output line number information. */
343 extern char flag_no_line_commands;
345 /* Nonzero causes -E output not to be done, but directives such as
346 #define that have side effects are still obeyed. */
348 extern char flag_no_output;
350 /* Nonzero means dump macros in some fashion; contains the 'D', 'M' or
351 'N' of the command line switch. */
353 extern char flag_dump_macros;
355 /* Nonzero means pass #include lines through to the output. */
357 extern char flag_dump_includes;
359 /* Nonzero means process PCH files while preprocessing. */
361 extern bool flag_pch_preprocess;
363 /* The file name to which we should write a precompiled header, or
364 NULL if no header will be written in this compile. */
366 extern const char *pch_file;
368 /* Nonzero if an ISO standard was selected. It rejects macros in the
373 /* Nonzero if -undef was given. It suppresses target built-in macros
376 extern int flag_undef;
378 /* Nonzero means don't recognize the non-ANSI builtin functions. */
380 extern int flag_no_builtin;
382 /* Nonzero means don't recognize the non-ANSI builtin functions.
385 extern int flag_no_nonansi_builtin;
387 /* Nonzero means give `double' the same size as `float'. */
389 extern int flag_short_double;
391 /* Nonzero means give `wchar_t' the same size as `short'. */
393 extern int flag_short_wchar;
395 /* Nonzero means allow Microsoft extensions without warnings or errors. */
396 extern int flag_ms_extensions;
398 /* Nonzero means don't recognize the keyword `asm'. */
400 extern int flag_no_asm;
402 /* Nonzero means give string constants the type `const char *', as mandated
405 extern int flag_const_strings;
407 /* Nonzero means to treat bitfields as signed unless they say `unsigned'. */
409 extern int flag_signed_bitfields;
411 /* Warn about #pragma directives that are not recognized. */
413 extern int warn_unknown_pragmas; /* Tri state variable. */
415 /* Warn about format/argument anomalies in calls to formatted I/O functions
416 (*printf, *scanf, strftime, strfmon, etc.). */
418 extern int warn_format;
421 /* C/ObjC language option variables. */
424 /* Nonzero means allow type mismatches in conditional expressions;
425 just make their values `void'. */
427 extern int flag_cond_mismatch;
429 /* Nonzero means enable C89 Amendment 1 features. */
431 extern int flag_isoc94;
433 /* Nonzero means use the ISO C99 dialect of C. */
435 extern int flag_isoc99;
437 /* Nonzero means that we have builtin functions, and main is an int. */
439 extern int flag_hosted;
441 /* Warn if main is suspicious. */
443 extern int warn_main;
446 /* ObjC language option variables. */
449 /* Open and close the file for outputting class declarations, if
452 extern int flag_gen_declaration;
454 /* Tells the compiler that this is a special run. Do not perform any
455 compiling, instead we are to test some platform dependent features
456 and output a C header file with appropriate definitions. */
458 extern int print_struct_values;
460 /* ???. Undocumented. */
462 extern const char *constant_string_class_name;
465 /* C++ language option variables. */
468 /* Nonzero means don't recognize any extension keywords. */
470 extern int flag_no_gnu_keywords;
472 /* Nonzero means do emit exported implementations of functions even if
473 they can be inlined. */
475 extern int flag_implement_inlines;
477 /* Nonzero means that implicit instantiations will be emitted if needed. */
479 extern int flag_implicit_templates;
481 /* Nonzero means that implicit instantiations of inline templates will be
482 emitted if needed, even if instantiations of non-inline templates
485 extern int flag_implicit_inline_templates;
487 /* Nonzero means generate separate instantiation control files and
488 juggle them at link time. */
490 extern int flag_use_repository;
492 /* Nonzero if we want to issue diagnostics that the standard says are not
495 extern int flag_optional_diags;
497 /* Nonzero means we should attempt to elide constructors when possible. */
499 extern int flag_elide_constructors;
501 /* Nonzero means that member functions defined in class scope are
502 inline by default. */
504 extern int flag_default_inline;
506 /* Controls whether compiler generates 'type descriptor' that give
507 run-time type information. */
509 extern int flag_rtti;
511 /* Nonzero if we want to conserve space in the .o files. We do this
512 by putting uninitialized data and runtime initialized data into
513 .common instead of .data at the expense of not flagging multiple
516 extern int flag_conserve_space;
518 /* Nonzero if we want to obey access control semantics. */
520 extern int flag_access_control;
522 /* Nonzero if we want to check the return value of new and avoid calling
523 constructors if it is a null pointer. */
525 extern int flag_check_new;
527 /* Nonzero if we want to allow the use of experimental features that
528 are likely to become part of C++0x. */
530 extern int flag_cpp0x;
532 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
533 initialization variables.
534 0: Old rules, set by -fno-for-scope.
535 2: New ISO rules, set by -ffor-scope.
536 1: Try to implement new ISO rules, but with backup compatibility
537 (and warnings). This is the default, for now. */
539 extern int flag_new_for_scope;
541 /* Nonzero if we want to emit defined symbols with common-like linkage as
542 weak symbols where possible, in order to conform to C++ semantics.
543 Otherwise, emit them as local symbols. */
545 extern int flag_weak;
547 /* 0 means we want the preprocessor to not emit line directives for
548 the current working directory. 1 means we want it to do it. -1
549 means we should decide depending on whether debugging information
550 is being emitted or not. */
552 extern int flag_working_directory;
554 /* Nonzero to use __cxa_atexit, rather than atexit, to register
555 destructors for local statics and global objects. */
557 extern int flag_use_cxa_atexit;
559 /* Nonzero to use __cxa_get_exception_ptr in the C++ exception-handling
562 extern int flag_use_cxa_get_exception_ptr;
564 /* Nonzero means make the default pedwarns warnings instead of errors.
565 The value of this flag is ignored if -pedantic is specified. */
567 extern int flag_permissive;
569 /* Nonzero means to implement standard semantics for exception
570 specifications, calling unexpected if an exception is thrown that
571 doesn't match the specification. Zero means to treat them as
572 assertions and optimize accordingly, but not check them. */
574 extern int flag_enforce_eh_specs;
576 /* Nonzero (the default) means to generate thread-safe code for
577 initializing local statics. */
579 extern int flag_threadsafe_statics;
581 /* Nonzero means warn about implicit declarations. */
583 extern int warn_implicit;
585 /* Warn about using __null (as NULL in C++) as sentinel. For code compiled
586 with GCC this doesn't matter as __null is guaranteed to have the right
589 extern int warn_strict_null_sentinel;
591 /* Maximum template instantiation depth. This limit is rather
592 arbitrary, but it exists to limit the time it takes to notice
593 infinite template instantiations. */
595 extern int max_tinst_depth;
597 /* Nonzero means the expression being parsed will never be evaluated.
598 This is a count, since unevaluated expressions can nest. */
600 extern int skip_evaluation;
602 /* C types are partitioned into three subsets: object, function, and
604 #define C_TYPE_OBJECT_P(type) \
605 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
607 #define C_TYPE_INCOMPLETE_P(type) \
608 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
610 #define C_TYPE_FUNCTION_P(type) \
611 (TREE_CODE (type) == FUNCTION_TYPE)
613 /* For convenience we define a single macro to identify the class of
614 object or incomplete types. */
615 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
616 (!C_TYPE_FUNCTION_P (type))
618 /* Attribute table common to the C front ends. */
619 extern const struct attribute_spec c_common_attribute_table[];
620 extern const struct attribute_spec c_common_format_attribute_table[];
622 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
623 ID is the identifier to use, NAME is the string.
624 TYPE_DEP indicates whether it depends on type of the function or not
625 (i.e. __PRETTY_FUNCTION__). */
627 extern tree (*make_fname_decl) (tree, int);
629 extern tree identifier_global_value (tree);
630 extern void record_builtin_type (enum rid, const char *, tree);
631 extern tree build_void_list_node (void);
632 extern void start_fname_decls (void);
633 extern void finish_fname_decls (void);
634 extern const char *fname_as_string (int);
635 extern tree fname_decl (unsigned, tree);
637 extern void check_function_arguments (tree, tree, tree);
638 extern void check_function_arguments_recurse (void (*)
640 unsigned HOST_WIDE_INT),
642 unsigned HOST_WIDE_INT);
643 extern void check_function_format (tree, tree);
644 extern void set_Wformat (int);
645 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
646 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
647 extern int c_common_handle_option (size_t code, const char *arg, int value);
648 extern bool c_common_missing_argument (const char *opt, size_t code);
649 extern tree c_common_type_for_mode (enum machine_mode, int);
650 extern tree c_common_type_for_size (unsigned int, int);
651 extern tree c_common_unsigned_type (tree);
652 extern tree c_common_signed_type (tree);
653 extern tree c_common_signed_or_unsigned_type (int, tree);
654 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
655 extern bool decl_with_nonnull_addr_p (tree);
656 extern tree c_common_truthvalue_conversion (tree);
657 extern void c_apply_type_quals_to_decl (int, tree);
658 extern tree c_sizeof_or_alignof_type (tree, bool, int);
659 extern tree c_alignof_expr (tree);
660 /* Print an error message for invalid operands to arith operation CODE.
661 NOP_EXPR is used as a special case (see truthvalue_conversion). */
662 extern void binary_op_error (enum tree_code);
663 extern tree fix_string_type (tree);
664 struct varray_head_tag;
665 extern void constant_expression_warning (tree);
666 extern void strict_aliasing_warning (tree, tree, tree);
667 extern void empty_body_warning (tree, tree);
668 extern tree convert_and_check (tree, tree);
669 extern void overflow_warning (tree);
670 extern void check_main_parameter_types (tree decl);
671 extern bool c_determine_visibility (tree);
672 extern bool same_scalar_type_ignoring_signedness (tree, tree);
674 #define c_sizeof(T) c_sizeof_or_alignof_type (T, true, 1)
675 #define c_alignof(T) c_sizeof_or_alignof_type (T, false, 1)
677 /* Subroutine of build_binary_op, used for comparison operations.
678 See if the operands have both been converted from subword integer types
679 and, if so, perhaps change them both back to their original type. */
680 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
682 extern tree pointer_int_sum (enum tree_code, tree, tree);
683 extern unsigned int min_precision (tree, int);
685 /* Add qualifiers to a type, in the fashion for C. */
686 extern tree c_build_qualified_type (tree, int);
688 /* Build tree nodes and builtin functions common to both C and C++ language
690 extern void c_common_nodes_and_builtins (void);
692 extern void set_builtin_user_assembler_name (tree decl, const char *asmspec);
694 extern void disable_builtin_function (const char *);
696 extern void set_compound_literal_name (tree decl);
698 extern tree build_va_arg (tree, tree);
700 extern unsigned int c_common_init_options (unsigned int, const char **);
701 extern bool c_common_post_options (const char **);
702 extern bool c_common_init (void);
703 extern void c_common_finish (void);
704 extern void c_common_parse_file (int);
705 extern HOST_WIDE_INT c_common_get_alias_set (tree);
706 extern void c_register_builtin_type (tree, const char*);
707 extern bool c_promoting_integer_type_p (tree);
708 extern int self_promoting_args_p (tree);
709 extern tree strip_array_types (tree);
710 extern tree strip_pointer_operator (tree);
711 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
713 /* This is the basic parsing function. */
714 extern void c_parse_file (void);
715 /* This is misnamed, it actually performs end-of-compilation processing. */
716 extern void finish_file (void);
719 /* These macros provide convenient access to the various _STMT nodes. */
721 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
722 if a statement expression. */
723 #define STATEMENT_LIST_STMT_EXPR(NODE) \
724 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
726 /* Nonzero if a label has been added to the statement list. */
727 #define STATEMENT_LIST_HAS_LABEL(NODE) \
728 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
730 /* COMPOUND_LITERAL_EXPR accessors. */
731 #define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \
732 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
733 #define COMPOUND_LITERAL_EXPR_DECL(NODE) \
734 DECL_EXPR_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
736 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
739 C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
740 #include "c-common.def"
746 extern int anon_aggr_type_p (tree);
748 /* For a VAR_DECL that is an anonymous union, these are the various
749 sub-variables that make up the anonymous union. */
750 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
752 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
753 #define DECL_C_BIT_FIELD(NODE) \
754 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
755 #define SET_DECL_C_BIT_FIELD(NODE) \
756 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
757 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
758 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
760 extern void emit_local_var (tree);
761 extern tree do_case (tree, tree);
762 extern tree build_stmt (enum tree_code, ...);
763 extern tree build_case_label (tree, tree, tree);
765 /* These functions must be defined by each front-end which implements
766 a variant of the C language. They are used in c-common.c. */
768 extern tree build_unary_op (enum tree_code, tree, int);
769 extern tree build_binary_op (enum tree_code, tree, tree, int);
770 extern tree perform_integral_promotions (tree);
772 /* These functions must be defined by each front-end which implements
773 a variant of the C language. They are used by port files. */
775 extern tree default_conversion (tree);
777 /* Given two integer or real types, return the type for their sum.
778 Given two compatible ANSI C types, returns the merged type. */
780 extern tree common_type (tree, tree);
782 extern tree decl_constant_value (tree);
784 /* Handle increment and decrement of boolean types. */
785 extern tree boolean_increment (enum tree_code, tree);
787 extern int case_compare (splay_tree_key, splay_tree_key);
789 extern tree c_add_case_label (splay_tree, tree, tree, tree, tree);
791 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
793 extern tree build_function_call (tree, tree);
795 extern tree resolve_overloaded_builtin (tree, tree);
797 extern tree finish_label_address_expr (tree);
799 /* Same function prototype, but the C and C++ front ends have
800 different implementations. Used in c-common.c. */
801 extern tree lookup_label (tree);
802 extern tree lookup_name (tree);
804 extern int vector_types_convertible_p (tree t1, tree t2);
806 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
808 extern tree c_staticp (tree);
810 extern void init_c_lex (void);
812 extern void c_cpp_builtins (cpp_reader *);
814 /* Positive if an implicit `extern "C"' scope has just been entered;
815 negative if such a scope has just been exited. */
816 extern GTY(()) int pending_lang_change;
818 /* Information recorded about each file examined during compilation. */
822 int time; /* Time spent in the file. */
824 /* Flags used only by C++.
825 INTERFACE_ONLY nonzero means that we are in an "interface" section
826 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust
827 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and
828 INTERFACE_ONLY is zero, it means that we are responsible for
829 exporting definitions that others might need. */
830 short interface_only;
831 short interface_unknown;
834 struct c_fileinfo *get_fileinfo (const char *);
835 extern void dump_time_statistics (void);
837 extern bool c_dump_tree (void *, tree);
839 extern void c_warn_unused_result (tree *);
841 extern void verify_sequence_points (tree);
843 extern tree fold_offsetof (tree, tree);
845 /* Places where an lvalue, or modifiable lvalue, may be required.
846 Used to select diagnostic messages in lvalue_error and
856 extern void lvalue_error (enum lvalue_use);
858 extern int complete_array_type (tree *, tree, bool);
860 extern tree builtin_type_for_size (int, bool);
862 extern void warn_array_subscript_with_type_char (tree);
863 extern void warn_about_parentheses (enum tree_code, enum tree_code,
867 /* In c-gimplify.c */
868 extern void c_genericize (tree);
869 extern int c_gimplify_expr (tree *, tree *, tree *);
870 extern tree c_build_bind_expr (tree, tree);
873 extern void pch_init (void);
874 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
875 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
877 extern void c_common_write_pch (void);
878 extern void c_common_no_more_pch (void);
879 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
880 extern void c_common_print_pch_checksum (FILE *f);
882 /* In *-checksum.c */
883 extern const unsigned char executable_checksum[16];
885 extern void builtin_define_with_value (const char *, const char *, int);
886 extern void c_stddef_cpp_builtins (void);
887 extern void fe_file_change (const struct line_map *);
888 extern void c_parse_error (const char *, enum cpp_ttype, tree);
890 /* Objective-C / Objective-C++ entry points. */
892 /* The following ObjC/ObjC++ functions are called by the C and/or C++
893 front-ends; they all must have corresponding stubs in stub-objc.c. */
894 extern tree objc_is_class_name (tree);
895 extern tree objc_is_object_ptr (tree);
896 extern void objc_check_decl (tree);
897 extern int objc_is_reserved_word (tree);
898 extern bool objc_compare_types (tree, tree, int, tree);
899 extern void objc_volatilize_decl (tree);
900 extern bool objc_type_quals_match (tree, tree);
901 extern tree objc_rewrite_function_call (tree, tree);
902 extern tree objc_message_selector (void);
903 extern tree objc_lookup_ivar (tree, tree);
904 extern void objc_clear_super_receiver (void);
905 extern int objc_is_public (tree, tree);
906 extern tree objc_is_id (tree);
907 extern void objc_declare_alias (tree, tree);
908 extern void objc_declare_class (tree);
909 extern void objc_declare_protocols (tree);
910 extern tree objc_build_message_expr (tree);
911 extern tree objc_finish_message_expr (tree, tree, tree);
912 extern tree objc_build_selector_expr (tree);
913 extern tree objc_build_protocol_expr (tree);
914 extern tree objc_build_encode_expr (tree);
915 extern tree objc_build_string_object (tree);
916 extern tree objc_get_protocol_qualified_type (tree, tree);
917 extern tree objc_get_class_reference (tree);
918 extern tree objc_get_class_ivars (tree);
919 extern void objc_start_class_interface (tree, tree, tree);
920 extern void objc_start_category_interface (tree, tree, tree);
921 extern void objc_start_protocol (tree, tree);
922 extern void objc_continue_interface (void);
923 extern void objc_finish_interface (void);
924 extern void objc_start_class_implementation (tree, tree);
925 extern void objc_start_category_implementation (tree, tree);
926 extern void objc_continue_implementation (void);
927 extern void objc_finish_implementation (void);
928 extern void objc_set_visibility (int);
929 extern void objc_set_method_type (enum tree_code);
930 extern tree objc_build_method_signature (tree, tree, tree, bool);
931 extern void objc_add_method_declaration (tree);
932 extern void objc_start_method_definition (tree);
933 extern void objc_finish_method_definition (tree);
934 extern void objc_add_instance_variable (tree);
935 extern tree objc_build_keyword_decl (tree, tree, tree);
936 extern tree objc_build_throw_stmt (tree);
937 extern void objc_begin_try_stmt (location_t, tree);
938 extern tree objc_finish_try_stmt (void);
939 extern void objc_begin_catch_clause (tree);
940 extern void objc_finish_catch_clause (void);
941 extern void objc_build_finally_clause (location_t, tree);
942 extern tree objc_build_synchronized (location_t, tree, tree);
943 extern int objc_static_init_needed_p (void);
944 extern tree objc_generate_static_init_call (tree);
945 extern tree objc_generate_write_barrier (tree, enum tree_code, tree);
947 /* The following are provided by the C and C++ front-ends, and called by
949 extern void *objc_get_current_scope (void);
950 extern void objc_mark_locals_volatile (void *);
952 /* In c-ppoutput.c */
953 extern void init_pp_output (FILE *);
954 extern void preprocess_file (cpp_reader *);
955 extern void pp_file_change (const struct line_map *);
956 extern void pp_dir_change (cpp_reader *, const char *);
957 extern bool check_missing_format_attribute (tree, tree);
960 extern tree c_finish_omp_master (tree);
961 extern tree c_finish_omp_critical (tree, tree);
962 extern tree c_finish_omp_ordered (tree);
963 extern void c_finish_omp_barrier (void);
964 extern tree c_finish_omp_atomic (enum tree_code, tree, tree);
965 extern void c_finish_omp_flush (void);
966 extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree);
967 extern void c_split_parallel_clauses (tree, tree *, tree *);
968 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
970 /* Not in c-omp.c; provided by the front end. */
971 extern bool c_omp_sharing_predetermined (tree);
972 extern tree c_omp_remap_decl (tree, bool);
974 /* In order for the format checking to accept the C frontend
975 diagnostic framework extensions, you must include this file before
976 toplev.h, not after. The C front end formats are a subset of those
977 for C++, so they are the appropriate set to use in common code;
978 cp-tree.h overrides this for C++. */
979 #ifndef GCC_DIAG_STYLE
980 #define GCC_DIAG_STYLE __gcc_cdiag__
983 #endif /* ! GCC_C_COMMON_H */