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,
94 RID_AT_ENCODE, RID_AT_END,
95 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS,
96 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC,
97 RID_AT_PROTOCOL, RID_AT_SELECTOR,
98 RID_AT_THROW, RID_AT_TRY, RID_AT_CATCH,
99 RID_AT_FINALLY, RID_AT_SYNCHRONIZED,
101 RID_AT_IMPLEMENTATION,
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. */
131 CTI_SIGNED_WCHAR_TYPE,
132 CTI_UNSIGNED_WCHAR_TYPE,
134 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
135 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
138 CTI_WIDEST_INT_LIT_TYPE,
139 CTI_WIDEST_UINT_LIT_TYPE,
142 CTI_WCHAR_ARRAY_TYPE,
145 CTI_CONST_STRING_TYPE,
147 /* Type for boolean expressions (bool in C++, int in C). */
150 CTI_TRUTHVALUE_FALSE,
152 CTI_DEFAULT_FUNCTION_TYPE,
154 /* These are not types, but we have to look them up all the time. */
155 CTI_FUNCTION_NAME_DECL,
156 CTI_PRETTY_FUNCTION_NAME_DECL,
157 CTI_C99_FUNCTION_NAME_DECL,
158 CTI_SAVED_FUNCTION_NAME_DECLS,
167 #define C_RID_CODE(id) (((struct c_common_identifier *) (id))->node.rid_code)
169 /* Identifier part common to the C front ends. Inherits from
170 tree_identifier, despite appearances. */
171 struct c_common_identifier GTY(())
173 struct tree_common common;
174 struct cpp_hashnode node;
177 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
178 #define signed_wchar_type_node c_global_trees[CTI_SIGNED_WCHAR_TYPE]
179 #define unsigned_wchar_type_node c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
180 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
181 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
182 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
183 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
184 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
185 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
186 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
188 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
189 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
190 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
192 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
193 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
194 #define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
195 #define string_type_node c_global_trees[CTI_STRING_TYPE]
196 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
198 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
200 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
201 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
202 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
203 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
205 /* A node for `((void) 0)'. */
206 #define void_zero_node c_global_trees[CTI_VOID_ZERO]
208 /* The node for C++ `__null'. */
209 #define null_node c_global_trees[CTI_NULL]
211 extern GTY(()) tree c_global_trees[CTI_MAX];
213 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
214 tree for size reasons. */
215 struct sorted_fields_type GTY(())
218 tree GTY((length ("%h.len"))) elts[1];
221 /* Mark which labels are explicitly declared.
222 These may be shadowed, and may be referenced from nested functions. */
223 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
225 typedef enum c_language_kind
227 clk_c = 0, /* C90, C94 or C99 */
228 clk_objc = 1, /* clk_c with ObjC features. */
229 clk_cxx = 2, /* ANSI/ISO C++ */
230 clk_objcxx = 3 /* clk_cxx with ObjC features. */
234 /* To test for a specific language use c_language, defined by each
235 front end. For "ObjC features" or "not C++" use the macros. */
236 extern c_language_kind c_language;
238 #define c_dialect_cxx() (c_language & clk_cxx)
239 #define c_dialect_objc() (c_language & clk_objc)
241 /* Information about a statement tree. */
243 struct stmt_tree_s GTY(()) {
244 /* The current statement list being collected. */
245 tree x_cur_stmt_list;
247 /* In C++, Nonzero if we should treat statements as full
248 expressions. In particular, this variable is no-zero if at the
249 end of a statement we should destroy any temporaries created
250 during that statement. Similarly, if, at the end of a block, we
251 should destroy any local variables in this block. Normally, this
252 variable is nonzero, since those are the normal semantics of
255 However, in order to represent aggregate initialization code as
256 tree structure, we use statement-expressions. The statements
257 within the statement expression should not result in cleanups
258 being run until the entire enclosing statement is complete.
260 This flag has no effect in C. */
261 int stmts_are_full_exprs_p;
264 typedef struct stmt_tree_s *stmt_tree;
266 /* Global state pertinent to the current function. Some C dialects
267 extend this structure with additional fields. */
269 struct c_language_function GTY(()) {
270 /* While we are parsing the function, this contains information
271 about the statement-tree that we are building. */
272 struct stmt_tree_s x_stmt_tree;
275 /* When building a statement-tree, this is the current statement list
276 being collected. It's TREE_CHAIN is a back-pointer to the previous
279 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
281 /* Language-specific hooks. */
283 /* Callback that determines if it's ok for a function to have no
284 noreturn attribute. */
285 extern int (*lang_missing_noreturn_ok_p) (tree);
287 /* If non-NULL, this function is called after a precompile header file
289 extern void (*lang_post_pch_load) (void);
291 extern void push_file_scope (void);
292 extern void pop_file_scope (void);
293 extern stmt_tree current_stmt_tree (void);
294 extern tree push_stmt_list (void);
295 extern tree pop_stmt_list (tree);
296 extern tree add_stmt (tree);
297 extern void push_cleanup (tree, tree, bool);
298 extern tree pushdecl_top_level (tree);
299 extern tree pushdecl (tree);
300 extern tree build_modify_expr (tree, enum tree_code, tree);
301 extern tree build_indirect_ref (tree, const char *);
303 extern int c_expand_decl (tree);
305 extern int field_decl_cmp (const void *, const void *);
306 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
308 extern bool has_c_linkage (tree decl);
310 /* Switches common to the C front ends. */
312 /* Nonzero if prepreprocessing only. */
314 extern int flag_preprocess_only;
316 /* Zero means that faster, ...NonNil variants of objc_msgSend...
317 calls will be used in ObjC; passing nil receivers to such calls
318 will most likely result in crashes. */
319 extern int flag_nil_receivers;
321 /* Nonzero means that we will allow new ObjC exception syntax (@throw,
322 @try, etc.) in source code. */
323 extern int flag_objc_exceptions;
325 /* Nonzero means that we generate NeXT setjmp based exceptions. */
326 extern int flag_objc_sjlj_exceptions;
328 /* Nonzero means that code generation will be altered to support
329 "zero-link" execution. This currently affects ObjC only, but may
330 affect other languages in the future. */
331 extern int flag_zero_link;
333 /* Nonzero means emit an '__OBJC, __image_info' for the current translation
334 unit. It will inform the ObjC runtime that class definition(s) herein
335 contained are to replace one(s) previously loaded. */
336 extern int flag_replace_objc_classes;
338 /* Nonzero means don't output line number information. */
340 extern char flag_no_line_commands;
342 /* Nonzero causes -E output not to be done, but directives such as
343 #define that have side effects are still obeyed. */
345 extern char flag_no_output;
347 /* Nonzero means dump macros in some fashion; contains the 'D', 'M' or
348 'N' of the command line switch. */
350 extern char flag_dump_macros;
352 /* Nonzero means pass #include lines through to the output. */
354 extern char flag_dump_includes;
356 /* Nonzero means process PCH files while preprocessing. */
358 extern bool flag_pch_preprocess;
360 /* The file name to which we should write a precompiled header, or
361 NULL if no header will be written in this compile. */
363 extern const char *pch_file;
365 /* Nonzero if an ISO standard was selected. It rejects macros in the
370 /* Nonzero if -undef was given. It suppresses target built-in macros
373 extern int flag_undef;
375 /* Nonzero means don't recognize the non-ANSI builtin functions. */
377 extern int flag_no_builtin;
379 /* Nonzero means don't recognize the non-ANSI builtin functions.
382 extern int flag_no_nonansi_builtin;
384 /* Nonzero means give `double' the same size as `float'. */
386 extern int flag_short_double;
388 /* Nonzero means give `wchar_t' the same size as `short'. */
390 extern int flag_short_wchar;
392 /* Nonzero means allow implicit conversions between vectors with
393 differing numbers of subparts and/or differing element types. */
394 extern int flag_lax_vector_conversions;
396 /* Nonzero means allow Microsoft extensions without warnings or errors. */
397 extern int flag_ms_extensions;
399 /* Nonzero means don't recognize the keyword `asm'. */
401 extern int flag_no_asm;
403 /* Nonzero means give string constants the type `const char *', as mandated
406 extern int flag_const_strings;
408 /* Nonzero means to treat bitfields as signed unless they say `unsigned'. */
410 extern int flag_signed_bitfields;
412 /* Warn about #pragma directives that are not recognized. */
414 extern int warn_unknown_pragmas; /* Tri state variable. */
416 /* Warn about format/argument anomalies in calls to formatted I/O functions
417 (*printf, *scanf, strftime, strfmon, etc.). */
419 extern int warn_format;
422 /* C/ObjC language option variables. */
425 /* Nonzero means allow type mismatches in conditional expressions;
426 just make their values `void'. */
428 extern int flag_cond_mismatch;
430 /* Nonzero means enable C89 Amendment 1 features. */
432 extern int flag_isoc94;
434 /* Nonzero means use the ISO C99 dialect of C. */
436 extern int flag_isoc99;
438 /* Nonzero means that we have builtin functions, and main is an int. */
440 extern int flag_hosted;
442 /* Warn if main is suspicious. */
444 extern int warn_main;
447 /* ObjC language option variables. */
450 /* Open and close the file for outputting class declarations, if
453 extern int flag_gen_declaration;
455 /* Tells the compiler that this is a special run. Do not perform any
456 compiling, instead we are to test some platform dependent features
457 and output a C header file with appropriate definitions. */
459 extern int print_struct_values;
461 /* ???. Undocumented. */
463 extern const char *constant_string_class_name;
466 /* C++ language option variables. */
469 /* Nonzero means don't recognize any extension keywords. */
471 extern int flag_no_gnu_keywords;
473 /* Nonzero means do emit exported implementations of functions even if
474 they can be inlined. */
476 extern int flag_implement_inlines;
478 /* Nonzero means that implicit instantiations will be emitted if needed. */
480 extern int flag_implicit_templates;
482 /* Nonzero means that implicit instantiations of inline templates will be
483 emitted if needed, even if instantiations of non-inline templates
486 extern int flag_implicit_inline_templates;
488 /* Nonzero means generate separate instantiation control files and
489 juggle them at link time. */
491 extern int flag_use_repository;
493 /* Nonzero if we want to issue diagnostics that the standard says are not
496 extern int flag_optional_diags;
498 /* Nonzero means we should attempt to elide constructors when possible. */
500 extern int flag_elide_constructors;
502 /* Nonzero means that member functions defined in class scope are
503 inline by default. */
505 extern int flag_default_inline;
507 /* Controls whether compiler generates 'type descriptor' that give
508 run-time type information. */
510 extern int flag_rtti;
512 /* Nonzero if we want to conserve space in the .o files. We do this
513 by putting uninitialized data and runtime initialized data into
514 .common instead of .data at the expense of not flagging multiple
517 extern int flag_conserve_space;
519 /* Nonzero if we want to obey access control semantics. */
521 extern int flag_access_control;
523 /* Nonzero if we want to check the return value of new and avoid calling
524 constructors if it is a null pointer. */
526 extern int flag_check_new;
528 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
529 initialization variables.
530 0: Old rules, set by -fno-for-scope.
531 2: New ISO rules, set by -ffor-scope.
532 1: Try to implement new ISO rules, but with backup compatibility
533 (and warnings). This is the default, for now. */
535 extern int flag_new_for_scope;
537 /* Nonzero if we want to emit defined symbols with common-like linkage as
538 weak symbols where possible, in order to conform to C++ semantics.
539 Otherwise, emit them as local symbols. */
541 extern int flag_weak;
543 /* 0 means we want the preprocessor to not emit line directives for
544 the current working directory. 1 means we want it to do it. -1
545 means we should decide depending on whether debugging information
546 is being emitted or not. */
548 extern int flag_working_directory;
550 /* Nonzero to use __cxa_atexit, rather than atexit, to register
551 destructors for local statics and global objects. */
553 extern int flag_use_cxa_atexit;
555 /* Nonzero to use __cxa_get_exception_ptr in the C++ exception-handling
558 extern int flag_use_cxa_get_exception_ptr;
560 /* Nonzero means make the default pedwarns warnings instead of errors.
561 The value of this flag is ignored if -pedantic is specified. */
563 extern int flag_permissive;
565 /* Nonzero means to implement standard semantics for exception
566 specifications, calling unexpected if an exception is thrown that
567 doesn't match the specification. Zero means to treat them as
568 assertions and optimize accordingly, but not check them. */
570 extern int flag_enforce_eh_specs;
572 /* Nonzero (the default) means to generate thread-safe code for
573 initializing local statics. */
575 extern int flag_threadsafe_statics;
577 /* Nonzero means warn about implicit declarations. */
579 extern int warn_implicit;
581 /* Warn about using __null (as NULL in C++) as sentinel. For code compiled
582 with GCC this doesn't matter as __null is guaranteed to have the right
585 extern int warn_strict_null_sentinel;
587 /* Maximum template instantiation depth. This limit is rather
588 arbitrary, but it exists to limit the time it takes to notice
589 infinite template instantiations. */
591 extern int max_tinst_depth;
593 /* Nonzero means the expression being parsed will never be evaluated.
594 This is a count, since unevaluated expressions can nest. */
596 extern int skip_evaluation;
598 /* C types are partitioned into three subsets: object, function, and
600 #define C_TYPE_OBJECT_P(type) \
601 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
603 #define C_TYPE_INCOMPLETE_P(type) \
604 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
606 #define C_TYPE_FUNCTION_P(type) \
607 (TREE_CODE (type) == FUNCTION_TYPE)
609 /* For convenience we define a single macro to identify the class of
610 object or incomplete types. */
611 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
612 (!C_TYPE_FUNCTION_P (type))
614 /* Attribute table common to the C front ends. */
615 extern const struct attribute_spec c_common_attribute_table[];
616 extern const struct attribute_spec c_common_format_attribute_table[];
618 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
619 ID is the identifier to use, NAME is the string.
620 TYPE_DEP indicates whether it depends on type of the function or not
621 (i.e. __PRETTY_FUNCTION__). */
623 extern tree (*make_fname_decl) (tree, int);
625 extern tree identifier_global_value (tree);
626 extern void record_builtin_type (enum rid, const char *, tree);
627 extern tree build_void_list_node (void);
628 extern void start_fname_decls (void);
629 extern void finish_fname_decls (void);
630 extern const char *fname_as_string (int);
631 extern tree fname_decl (unsigned, tree);
633 extern void check_function_arguments (tree, tree, tree);
634 extern void check_function_arguments_recurse (void (*)
636 unsigned HOST_WIDE_INT),
638 unsigned HOST_WIDE_INT);
639 extern void check_function_format (tree, tree);
640 extern void set_Wformat (int);
641 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
642 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
643 extern int c_common_handle_option (size_t code, const char *arg, int value);
644 extern bool c_common_missing_argument (const char *opt, size_t code);
645 extern tree c_common_type_for_mode (enum machine_mode, int);
646 extern tree c_common_type_for_size (unsigned int, int);
647 extern tree c_common_unsigned_type (tree);
648 extern tree c_common_signed_type (tree);
649 extern tree c_common_signed_or_unsigned_type (int, tree);
650 extern tree c_build_bitfield_integer_type (unsigned HOST_WIDE_INT, int);
651 extern tree c_common_truthvalue_conversion (tree);
652 extern void c_apply_type_quals_to_decl (int, tree);
653 extern tree c_sizeof_or_alignof_type (tree, bool, int);
654 extern tree c_alignof_expr (tree);
655 /* Print an error message for invalid operands to arith operation CODE.
656 NOP_EXPR is used as a special case (see truthvalue_conversion). */
657 extern void binary_op_error (enum tree_code, tree, tree);
658 extern tree fix_string_type (tree);
659 struct varray_head_tag;
660 extern void constant_expression_warning (tree);
661 extern bool strict_aliasing_warning (tree, tree, tree);
662 extern void empty_body_warning (tree, tree);
663 extern tree convert_and_check (tree, tree);
664 extern void overflow_warning (tree);
665 extern bool c_determine_visibility (tree);
666 extern bool same_scalar_type_ignoring_signedness (tree, tree);
668 #define c_sizeof(T) c_sizeof_or_alignof_type (T, true, 1)
669 #define c_alignof(T) c_sizeof_or_alignof_type (T, false, 1)
671 /* Subroutine of build_binary_op, used for comparison operations.
672 See if the operands have both been converted from subword integer types
673 and, if so, perhaps change them both back to their original type. */
674 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
676 extern tree pointer_int_sum (enum tree_code, tree, tree);
677 extern unsigned int min_precision (tree, int);
679 /* Add qualifiers to a type, in the fashion for C. */
680 extern tree c_build_qualified_type (tree, int);
682 /* Build tree nodes and builtin functions common to both C and C++ language
684 extern void c_common_nodes_and_builtins (void);
686 extern void set_builtin_user_assembler_name (tree decl, const char *asmspec);
688 extern void disable_builtin_function (const char *);
690 extern void set_compound_literal_name (tree decl);
692 extern tree build_va_arg (tree, tree);
694 extern unsigned int c_common_init_options (unsigned int, const char **);
695 extern bool c_common_post_options (const char **);
696 extern bool c_common_init (void);
697 extern void c_common_finish (void);
698 extern void c_common_parse_file (int);
699 extern HOST_WIDE_INT c_common_get_alias_set (tree);
700 extern void c_register_builtin_type (tree, const char*);
701 extern bool c_promoting_integer_type_p (tree);
702 extern int self_promoting_args_p (tree);
703 extern tree strip_array_types (tree);
704 extern tree strip_pointer_operator (tree);
705 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
707 /* This is the basic parsing function. */
708 extern void c_parse_file (void);
709 /* This is misnamed, it actually performs end-of-compilation processing. */
710 extern void finish_file (void);
713 /* These macros provide convenient access to the various _STMT nodes. */
715 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
716 if a statement expression. */
717 #define STATEMENT_LIST_STMT_EXPR(NODE) \
718 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
720 /* Nonzero if a label has been added to the statement list. */
721 #define STATEMENT_LIST_HAS_LABEL(NODE) \
722 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
724 /* COMPOUND_LITERAL_EXPR accessors. */
725 #define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \
726 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
727 #define COMPOUND_LITERAL_EXPR_DECL(NODE) \
728 DECL_EXPR_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
730 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
733 C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
734 #include "c-common.def"
740 extern int anon_aggr_type_p (tree);
742 /* For a VAR_DECL that is an anonymous union, these are the various
743 sub-variables that make up the anonymous union. */
744 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
746 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
747 #define DECL_C_BIT_FIELD(NODE) \
748 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
749 #define SET_DECL_C_BIT_FIELD(NODE) \
750 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
751 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
752 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
754 extern void emit_local_var (tree);
755 extern tree do_case (tree, tree);
756 extern tree build_stmt (enum tree_code, ...);
757 extern tree build_case_label (tree, tree, tree);
759 /* These functions must be defined by each front-end which implements
760 a variant of the C language. They are used in c-common.c. */
762 extern tree build_unary_op (enum tree_code, tree, int);
763 extern tree build_binary_op (enum tree_code, tree, tree, int);
764 extern tree perform_integral_promotions (tree);
766 /* These functions must be defined by each front-end which implements
767 a variant of the C language. They are used by port files. */
769 extern tree default_conversion (tree);
771 /* Given two integer or real types, return the type for their sum.
772 Given two compatible ANSI C types, returns the merged type. */
774 extern tree common_type (tree, tree);
776 extern tree decl_constant_value (tree);
778 /* Handle increment and decrement of boolean types. */
779 extern tree boolean_increment (enum tree_code, tree);
781 extern int case_compare (splay_tree_key, splay_tree_key);
783 extern tree c_add_case_label (splay_tree, tree, tree, tree, tree);
785 extern void c_do_switch_warnings (splay_tree, location_t, tree, tree);
787 extern tree build_function_call (tree, tree);
789 extern tree resolve_overloaded_builtin (tree, tree);
791 extern tree finish_label_address_expr (tree);
793 /* Same function prototype, but the C and C++ front ends have
794 different implementations. Used in c-common.c. */
795 extern tree lookup_label (tree);
796 extern tree lookup_name (tree);
798 extern bool vector_types_convertible_p (tree t1, tree t2, bool emit_lax_note);
800 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
802 extern tree c_staticp (tree);
804 extern void init_c_lex (void);
806 extern void c_cpp_builtins (cpp_reader *);
808 /* Positive if an implicit `extern "C"' scope has just been entered;
809 negative if such a scope has just been exited. */
810 extern GTY(()) int pending_lang_change;
812 /* Information recorded about each file examined during compilation. */
816 int time; /* Time spent in the file. */
818 /* Flags used only by C++.
819 INTERFACE_ONLY nonzero means that we are in an "interface" section
820 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust
821 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and
822 INTERFACE_ONLY is zero, it means that we are responsible for
823 exporting definitions that others might need. */
824 short interface_only;
825 short interface_unknown;
828 struct c_fileinfo *get_fileinfo (const char *);
829 extern void dump_time_statistics (void);
831 extern bool c_dump_tree (void *, tree);
833 extern void c_warn_unused_result (tree *);
835 extern void verify_sequence_points (tree);
837 extern tree fold_offsetof (tree, tree);
839 /* Places where an lvalue, or modifiable lvalue, may be required.
840 Used to select diagnostic messages in lvalue_error and
850 extern void lvalue_error (enum lvalue_use);
852 extern int complete_array_type (tree *, tree, bool);
854 extern tree builtin_type_for_size (int, bool);
856 extern void warn_array_subscript_with_type_char (tree);
857 extern void warn_about_parentheses (enum tree_code, enum tree_code,
861 /* In c-gimplify.c */
862 extern void c_genericize (tree);
863 extern int c_gimplify_expr (tree *, tree *, tree *);
864 extern tree c_build_bind_expr (tree, tree);
867 extern void pch_init (void);
868 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
869 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
871 extern void c_common_write_pch (void);
872 extern void c_common_no_more_pch (void);
873 extern void c_common_pch_pragma (cpp_reader *pfile, const char *);
874 extern void c_common_print_pch_checksum (FILE *f);
876 /* In *-checksum.c */
877 extern const unsigned char executable_checksum[16];
879 extern void builtin_define_with_value (const char *, const char *, int);
880 extern void c_stddef_cpp_builtins (void);
881 extern void fe_file_change (const struct line_map *);
882 extern void c_parse_error (const char *, enum cpp_ttype, tree);
884 /* Objective-C / Objective-C++ entry points. */
886 /* The following ObjC/ObjC++ functions are called by the C and/or C++
887 front-ends; they all must have corresponding stubs in stub-objc.c. */
888 extern tree objc_is_class_name (tree);
889 extern tree objc_is_object_ptr (tree);
890 extern void objc_check_decl (tree);
891 extern int objc_is_reserved_word (tree);
892 extern bool objc_compare_types (tree, tree, int, tree);
893 extern void objc_volatilize_decl (tree);
894 extern bool objc_type_quals_match (tree, tree);
895 extern tree objc_rewrite_function_call (tree, tree);
896 extern tree objc_message_selector (void);
897 extern tree objc_lookup_ivar (tree, tree);
898 extern void objc_clear_super_receiver (void);
899 extern int objc_is_public (tree, tree);
900 extern tree objc_is_id (tree);
901 extern void objc_declare_alias (tree, tree);
902 extern void objc_declare_class (tree);
903 extern void objc_declare_protocols (tree);
904 extern tree objc_build_message_expr (tree);
905 extern tree objc_finish_message_expr (tree, tree, tree);
906 extern tree objc_build_selector_expr (tree);
907 extern tree objc_build_protocol_expr (tree);
908 extern tree objc_build_encode_expr (tree);
909 extern tree objc_build_string_object (tree);
910 extern tree objc_get_protocol_qualified_type (tree, tree);
911 extern tree objc_get_class_reference (tree);
912 extern tree objc_get_class_ivars (tree);
913 extern void objc_start_class_interface (tree, tree, tree);
914 extern void objc_start_category_interface (tree, tree, tree);
915 extern void objc_start_protocol (tree, tree);
916 extern void objc_continue_interface (void);
917 extern void objc_finish_interface (void);
918 extern void objc_start_class_implementation (tree, tree);
919 extern void objc_start_category_implementation (tree, tree);
920 extern void objc_continue_implementation (void);
921 extern void objc_finish_implementation (void);
922 extern void objc_set_visibility (int);
923 extern void objc_set_method_type (enum tree_code);
924 extern tree objc_build_method_signature (tree, tree, tree, bool);
925 extern void objc_add_method_declaration (tree);
926 extern void objc_start_method_definition (tree);
927 extern void objc_finish_method_definition (tree);
928 extern void objc_add_instance_variable (tree);
929 extern tree objc_build_keyword_decl (tree, tree, tree);
930 extern tree objc_build_throw_stmt (tree);
931 extern void objc_begin_try_stmt (location_t, tree);
932 extern tree objc_finish_try_stmt (void);
933 extern void objc_begin_catch_clause (tree);
934 extern void objc_finish_catch_clause (void);
935 extern void objc_build_finally_clause (location_t, tree);
936 extern tree objc_build_synchronized (location_t, tree, tree);
937 extern int objc_static_init_needed_p (void);
938 extern tree objc_generate_static_init_call (tree);
939 extern tree objc_generate_write_barrier (tree, enum tree_code, tree);
941 /* The following are provided by the C and C++ front-ends, and called by
943 extern void *objc_get_current_scope (void);
944 extern void objc_mark_locals_volatile (void *);
946 /* In c-ppoutput.c */
947 extern void init_pp_output (FILE *);
948 extern void preprocess_file (cpp_reader *);
949 extern void pp_file_change (const struct line_map *);
950 extern void pp_dir_change (cpp_reader *, const char *);
951 extern bool check_missing_format_attribute (tree, tree);
954 extern tree c_finish_omp_master (tree);
955 extern tree c_finish_omp_critical (tree, tree);
956 extern tree c_finish_omp_ordered (tree);
957 extern void c_finish_omp_barrier (void);
958 extern tree c_finish_omp_atomic (enum tree_code, tree, tree);
959 extern void c_finish_omp_flush (void);
960 extern tree c_finish_omp_for (location_t, tree, tree, tree, tree, tree, tree);
961 extern void c_split_parallel_clauses (tree, tree *, tree *);
962 extern enum omp_clause_default_kind c_omp_predetermined_sharing (tree);
964 /* Not in c-omp.c; provided by the front end. */
965 extern bool c_omp_sharing_predetermined (tree);
966 extern tree c_omp_remap_decl (tree, bool);
968 /* In order for the format checking to accept the C frontend
969 diagnostic framework extensions, you must include this file before
970 toplev.h, not after. The C front end formats are a subset of those
971 for C++, so they are the appropriate set to use in common code;
972 cp-tree.h overrides this for C++. */
973 #ifndef GCC_DIAG_STYLE
974 #define GCC_DIAG_STYLE __gcc_cdiag__
977 #endif /* ! GCC_C_COMMON_H */