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, 59 Temple Place - Suite 330, Boston, MA
22 #ifndef GCC_C_COMMON_H
23 #define GCC_C_COMMON_H
25 #include "splay-tree.h"
29 /* Usage of TREE_LANG_FLAG_?:
30 0: TREE_NEGATED_INT (in INTEGER_CST).
31 IDENTIFIER_MARKED (used by search routines).
32 DECL_PRETTY_FUNCTION_P (in VAR_DECL)
33 STMT_EXPR_NO_SCOPE (in STMT_EXPR)
34 1: C_DECLARED_LABEL_FLAG (in LABEL_DECL)
35 STMT_IS_FULL_EXPR_P (in _STMT)
36 STATEMENT_LIST_STMT_EXPR (in STATEMENT_LIST)
38 3: STATEMENT_LIST_HAS_LABEL (in STATEMENT_LIST)
42 /* Reserved identifiers. This is the union of all the keywords for C,
43 C++, and Objective-C. All the type modifiers have to be in one
44 block at the beginning, because they are used as mask bits. There
45 are 27 type modifiers; if we add many more we will have to redesign
46 the mask mechanism. */
51 /* C, in empirical order of frequency. */
53 RID_UNSIGNED, RID_LONG, RID_CONST, RID_EXTERN,
54 RID_REGISTER, RID_TYPEDEF, RID_SHORT, RID_INLINE,
55 RID_VOLATILE, RID_SIGNED, RID_AUTO, RID_RESTRICT,
58 RID_COMPLEX, RID_THREAD,
61 RID_FRIEND, RID_VIRTUAL, RID_EXPLICIT, RID_EXPORT, RID_MUTABLE,
64 RID_IN, RID_OUT, RID_INOUT, RID_BYCOPY, RID_BYREF, RID_ONEWAY,
67 RID_INT, RID_CHAR, RID_FLOAT, RID_DOUBLE, RID_VOID,
68 RID_ENUM, RID_STRUCT, RID_UNION, RID_IF, RID_ELSE,
69 RID_WHILE, RID_DO, RID_FOR, RID_SWITCH, RID_CASE,
70 RID_DEFAULT, RID_BREAK, RID_CONTINUE, RID_RETURN, RID_GOTO,
74 RID_ASM, RID_TYPEOF, RID_ALIGNOF, RID_ATTRIBUTE, RID_VA_ARG,
75 RID_EXTENSION, RID_IMAGPART, RID_REALPART, RID_LABEL, RID_CHOOSE_EXPR,
76 RID_TYPES_COMPATIBLE_P,
78 /* Too many ways of getting the name of a function as a string */
79 RID_FUNCTION_NAME, RID_PRETTY_FUNCTION_NAME, RID_C99_FUNCTION_NAME,
82 RID_BOOL, RID_WCHAR, RID_CLASS,
83 RID_PUBLIC, RID_PRIVATE, RID_PROTECTED,
84 RID_TEMPLATE, RID_NULL, RID_CATCH,
85 RID_DELETE, RID_FALSE, RID_NAMESPACE,
86 RID_NEW, RID_OFFSETOF, RID_OPERATOR,
87 RID_THIS, RID_THROW, RID_TRUE,
88 RID_TRY, RID_TYPENAME, RID_TYPEID,
92 RID_CONSTCAST, RID_DYNCAST, RID_REINTCAST, RID_STATCAST,
95 RID_AT_ENCODE, RID_AT_END,
96 RID_AT_CLASS, RID_AT_ALIAS, RID_AT_DEFS,
97 RID_AT_PRIVATE, RID_AT_PROTECTED, RID_AT_PUBLIC,
98 RID_AT_PROTOCOL, RID_AT_SELECTOR,
99 RID_AT_THROW, RID_AT_TRY, RID_AT_CATCH,
100 RID_AT_FINALLY, RID_AT_SYNCHRONIZED,
102 RID_AT_IMPLEMENTATION,
106 RID_FIRST_MODIFIER = RID_STATIC,
107 RID_LAST_MODIFIER = RID_ONEWAY,
109 RID_FIRST_AT = RID_AT_ENCODE,
110 RID_LAST_AT = RID_AT_IMPLEMENTATION,
111 RID_FIRST_PQ = RID_IN,
112 RID_LAST_PQ = RID_ONEWAY
115 #define OBJC_IS_AT_KEYWORD(rid) \
116 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
117 (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
119 #define OBJC_IS_PQ_KEYWORD(rid) \
120 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
121 (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
123 /* The elements of `ridpointers' are identifier nodes for the reserved
124 type names and storage classes. It is indexed by a RID_... value. */
125 extern GTY ((length ("(int) RID_MAX"))) tree *ridpointers;
127 /* Standard named or nameless data types of the C compiler. */
132 CTI_SIGNED_WCHAR_TYPE,
133 CTI_UNSIGNED_WCHAR_TYPE,
135 CTI_SIGNED_SIZE_TYPE, /* For format checking only. */
136 CTI_UNSIGNED_PTRDIFF_TYPE, /* For format checking only. */
139 CTI_WIDEST_INT_LIT_TYPE,
140 CTI_WIDEST_UINT_LIT_TYPE,
143 CTI_WCHAR_ARRAY_TYPE,
146 CTI_CONST_STRING_TYPE,
148 /* Type for boolean expressions (bool in C++, int in C). */
151 CTI_TRUTHVALUE_FALSE,
153 CTI_DEFAULT_FUNCTION_TYPE,
155 /* These are not types, but we have to look them up all the time. */
156 CTI_FUNCTION_NAME_DECL,
157 CTI_PRETTY_FUNCTION_NAME_DECL,
158 CTI_C99_FUNCTION_NAME_DECL,
159 CTI_SAVED_FUNCTION_NAME_DECLS,
168 #define C_RID_CODE(id) (((struct c_common_identifier *) (id))->node.rid_code)
170 /* Identifier part common to the C front ends. Inherits from
171 tree_identifier, despite appearances. */
172 struct c_common_identifier GTY(())
174 struct tree_common common;
175 struct cpp_hashnode node;
178 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
179 #define signed_wchar_type_node c_global_trees[CTI_SIGNED_WCHAR_TYPE]
180 #define unsigned_wchar_type_node c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
181 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
182 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
183 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
184 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
185 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
186 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
187 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
189 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
190 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
191 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
193 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
194 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
195 #define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
196 #define string_type_node c_global_trees[CTI_STRING_TYPE]
197 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
199 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
201 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
202 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
203 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
204 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
206 /* A node for `((void) 0)'. */
207 #define void_zero_node c_global_trees[CTI_VOID_ZERO]
209 /* The node for C++ `__null'. */
210 #define null_node c_global_trees[CTI_NULL]
212 extern GTY(()) tree c_global_trees[CTI_MAX];
214 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
215 tree for size reasons. */
216 struct sorted_fields_type GTY(())
219 tree GTY((length ("%h.len"))) elts[1];
222 /* Mark which labels are explicitly declared.
223 These may be shadowed, and may be referenced from nested functions. */
224 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
226 /* Flag strings given by __FUNCTION__ and __PRETTY_FUNCTION__ for a
227 warning if they undergo concatenation. */
228 #define C_ARTIFICIAL_STRING_P(NODE) TREE_LANG_FLAG_0 (NODE)
230 typedef enum c_language_kind
232 clk_c = 0, /* C90, C94 or C99 */
233 clk_objc = 1, /* clk_c with ObjC features. */
234 clk_cxx = 2, /* ANSI/ISO C++ */
235 clk_objcxx = 3 /* clk_cxx with ObjC features. */
239 /* To test for a specific language use c_language, defined by each
240 front end. For "ObjC features" or "not C++" use the macros. */
241 extern c_language_kind c_language;
243 #define c_dialect_cxx() (c_language & clk_cxx)
244 #define c_dialect_objc() (c_language & clk_objc)
246 /* Information about a statement tree. */
248 struct stmt_tree_s GTY(()) {
249 /* The current statement list being collected. */
250 tree x_cur_stmt_list;
252 /* In C++, Nonzero if we should treat statements as full
253 expressions. In particular, this variable is no-zero if at the
254 end of a statement we should destroy any temporaries created
255 during that statement. Similarly, if, at the end of a block, we
256 should destroy any local variables in this block. Normally, this
257 variable is nonzero, since those are the normal semantics of
260 However, in order to represent aggregate initialization code as
261 tree structure, we use statement-expressions. The statements
262 within the statement expression should not result in cleanups
263 being run until the entire enclosing statement is complete.
265 This flag has no effect in C. */
266 int stmts_are_full_exprs_p;
269 typedef struct stmt_tree_s *stmt_tree;
271 /* Global state pertinent to the current function. Some C dialects
272 extend this structure with additional fields. */
274 struct c_language_function GTY(()) {
275 /* While we are parsing the function, this contains information
276 about the statement-tree that we are building. */
277 struct stmt_tree_s x_stmt_tree;
280 /* When building a statement-tree, this is the current statement list
281 being collected. It's TREE_CHAIN is a back-pointer to the previous
284 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
286 /* Language-specific hooks. */
288 /* Callback that determines if it's ok for a function to have no
289 noreturn attribute. */
290 extern int (*lang_missing_noreturn_ok_p) (tree);
292 /* If non-NULL, this function is called after a precompile header file
294 extern void (*lang_post_pch_load) (void);
296 extern void push_file_scope (void);
297 extern void pop_file_scope (void);
298 extern int yyparse (void);
299 extern stmt_tree current_stmt_tree (void);
300 extern tree push_stmt_list (void);
301 extern tree pop_stmt_list (tree);
302 extern tree add_stmt (tree);
303 extern void push_cleanup (tree, tree, bool);
305 extern int c_expand_decl (tree);
307 extern int field_decl_cmp (const void *, const void *);
308 extern void resort_sorted_fields (void *, void *, gt_pointer_operator,
310 extern bool has_c_linkage (tree decl);
312 /* Switches common to the C front ends. */
314 /* Nonzero if prepreprocessing only. */
316 extern int flag_preprocess_only;
318 /* Zero means that faster, ...NonNil variants of objc_msgSend...
319 calls will be used in ObjC; passing nil receivers to such calls
320 will most likely result in crashes. */
321 extern int flag_nil_receivers;
323 /* Nonzero means that we will allow new ObjC exception syntax (@throw,
324 @try, etc.) in source code. */
325 extern int flag_objc_exceptions;
327 /* Nonzero means that we generate NeXT setjmp based exceptions. */
328 extern int flag_objc_sjlj_exceptions;
330 /* Nonzero means that code generation will be altered to support
331 "zero-link" execution. This currently affects ObjC only, but may
332 affect other languages in the future. */
333 extern int flag_zero_link;
335 /* Nonzero means emit an '__OBJC, __image_info' for the current translation
336 unit. It will inform the ObjC runtime that class definition(s) herein
337 contained are to replace one(s) previously loaded. */
338 extern int flag_replace_objc_classes;
340 /* Nonzero means don't output line number information. */
342 extern char flag_no_line_commands;
344 /* Nonzero causes -E output not to be done, but directives such as
345 #define that have side effects are still obeyed. */
347 extern char flag_no_output;
349 /* Nonzero means dump macros in some fashion; contains the 'D', 'M' or
350 'N' of the command line switch. */
352 extern char flag_dump_macros;
354 /* Nonzero means pass #include lines through to the output. */
356 extern char flag_dump_includes;
358 /* Nonzero means process PCH files while preprocessing. */
360 extern bool flag_pch_preprocess;
362 /* The file name to which we should write a precompiled header, or
363 NULL if no header will be written in this compile. */
365 extern const char *pch_file;
367 /* Nonzero if an ISO standard was selected. It rejects macros in the
372 /* Nonzero if -undef was given. It suppresses target built-in macros
375 extern int flag_undef;
377 /* Nonzero means don't recognize the non-ANSI builtin functions. */
379 extern int flag_no_builtin;
381 /* Nonzero means don't recognize the non-ANSI builtin functions.
384 extern int flag_no_nonansi_builtin;
386 /* Nonzero means give `double' the same size as `float'. */
388 extern int flag_short_double;
390 /* Nonzero means give `wchar_t' the same size as `short'. */
392 extern int flag_short_wchar;
394 /* Nonzero means allow Microsoft extensions without warnings or errors. */
395 extern int flag_ms_extensions;
397 /* Nonzero means don't recognize the keyword `asm'. */
399 extern int flag_no_asm;
401 /* Nonzero means give string constants the type `const char *', as mandated
404 extern int flag_const_strings;
406 /* Nonzero means to treat bitfields as signed unless they say `unsigned'. */
408 extern int flag_signed_bitfields;
410 /* Nonzero means warn about deprecated conversion from string constant to
413 extern int warn_write_strings;
415 /* Warn about #pragma directives that are not recognized. */
417 extern int warn_unknown_pragmas; /* Tri state variable. */
419 /* Warn about format/argument anomalies in calls to formatted I/O functions
420 (*printf, *scanf, strftime, strfmon, etc.). */
422 extern int warn_format;
425 /* C/ObjC language option variables. */
428 /* Nonzero means allow type mismatches in conditional expressions;
429 just make their values `void'. */
431 extern int flag_cond_mismatch;
433 /* Nonzero means enable C89 Amendment 1 features. */
435 extern int flag_isoc94;
437 /* Nonzero means use the ISO C99 dialect of C. */
439 extern int flag_isoc99;
441 /* Nonzero means that we have builtin functions, and main is an int. */
443 extern int flag_hosted;
445 /* Warn if main is suspicious. */
447 extern int warn_main;
450 /* ObjC language option variables. */
453 /* Open and close the file for outputting class declarations, if
456 extern int flag_gen_declaration;
458 /* Generate code for GNU or NeXT runtime environment. */
460 extern int flag_next_runtime;
462 /* Tells the compiler that this is a special run. Do not perform any
463 compiling, instead we are to test some platform dependent features
464 and output a C header file with appropriate definitions. */
466 extern int print_struct_values;
468 /* ???. Undocumented. */
470 extern const char *constant_string_class_name;
473 /* C++ language option variables. */
476 /* Nonzero means don't recognize any extension keywords. */
478 extern int flag_no_gnu_keywords;
480 /* Nonzero means do emit exported implementations of functions even if
481 they can be inlined. */
483 extern int flag_implement_inlines;
485 /* Nonzero means that implicit instantiations will be emitted if needed. */
487 extern int flag_implicit_templates;
489 /* Nonzero means that implicit instantiations of inline templates will be
490 emitted if needed, even if instantiations of non-inline templates
493 extern int flag_implicit_inline_templates;
495 /* Nonzero means generate separate instantiation control files and
496 juggle them at link time. */
498 extern int flag_use_repository;
500 /* Nonzero if we want to issue diagnostics that the standard says are not
503 extern int flag_optional_diags;
505 /* Nonzero means we should attempt to elide constructors when possible. */
507 extern int flag_elide_constructors;
509 /* Nonzero means that member functions defined in class scope are
510 inline by default. */
512 extern int flag_default_inline;
514 /* Controls whether compiler generates 'type descriptor' that give
515 run-time type information. */
517 extern int flag_rtti;
519 /* Nonzero if we want to conserve space in the .o files. We do this
520 by putting uninitialized data and runtime initialized data into
521 .common instead of .data at the expense of not flagging multiple
524 extern int flag_conserve_space;
526 /* Nonzero if we want to obey access control semantics. */
528 extern int flag_access_control;
530 /* Nonzero if we want to check the return value of new and avoid calling
531 constructors if it is a null pointer. */
533 extern int flag_check_new;
535 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
536 initialization variables.
537 0: Old rules, set by -fno-for-scope.
538 2: New ISO rules, set by -ffor-scope.
539 1: Try to implement new ISO rules, but with backup compatibility
540 (and warnings). This is the default, for now. */
542 extern int flag_new_for_scope;
544 /* Nonzero if we want to emit defined symbols with common-like linkage as
545 weak symbols where possible, in order to conform to C++ semantics.
546 Otherwise, emit them as local symbols. */
548 extern int flag_weak;
550 /* 0 means we want the preprocessor to not emit line directives for
551 the current working directory. 1 means we want it to do it. -1
552 means we should decide depending on whether debugging information
553 is being emitted or not. */
555 extern int flag_working_directory;
557 /* Nonzero to use __cxa_atexit, rather than atexit, to register
558 destructors for local statics and global objects. */
560 extern int flag_use_cxa_atexit;
562 /* Nonzero means make the default pedwarns warnings instead of errors.
563 The value of this flag is ignored if -pedantic is specified. */
565 extern int flag_permissive;
567 /* Nonzero means to implement standard semantics for exception
568 specifications, calling unexpected if an exception is thrown that
569 doesn't match the specification. Zero means to treat them as
570 assertions and optimize accordingly, but not check them. */
572 extern int flag_enforce_eh_specs;
574 /* Nonzero (the default) means to generate thread-safe code for
575 initializing local statics. */
577 extern int flag_threadsafe_statics;
579 /* Nonzero means warn about implicit declarations. */
581 extern int warn_implicit;
583 /* Warn about using __null (as NULL in C++) as sentinel. For code compiled
584 with GCC this doesn't matter as __null is guaranteed to have the right
587 extern int warn_strict_null_sentinel;
589 /* Maximum template instantiation depth. This limit is rather
590 arbitrary, but it exists to limit the time it takes to notice
591 infinite template instantiations. */
593 extern int max_tinst_depth;
595 /* Nonzero means the expression being parsed will never be evaluated.
596 This is a count, since unevaluated expressions can nest. */
598 extern int skip_evaluation;
600 /* C types are partitioned into three subsets: object, function, and
602 #define C_TYPE_OBJECT_P(type) \
603 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
605 #define C_TYPE_INCOMPLETE_P(type) \
606 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
608 #define C_TYPE_FUNCTION_P(type) \
609 (TREE_CODE (type) == FUNCTION_TYPE)
611 /* For convenience we define a single macro to identify the class of
612 object or incomplete types. */
613 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
614 (!C_TYPE_FUNCTION_P (type))
616 /* Attribute table common to the C front ends. */
617 extern const struct attribute_spec c_common_attribute_table[];
618 extern const struct attribute_spec c_common_format_attribute_table[];
620 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
621 ID is the identifier to use, NAME is the string.
622 TYPE_DEP indicates whether it depends on type of the function or not
623 (i.e. __PRETTY_FUNCTION__). */
625 extern tree (*make_fname_decl) (tree, int);
627 extern tree identifier_global_value (tree);
628 extern void record_builtin_type (enum rid, const char *, tree);
629 extern tree build_void_list_node (void);
630 extern void start_fname_decls (void);
631 extern void finish_fname_decls (void);
632 extern const char *fname_as_string (int);
633 extern tree fname_decl (unsigned, tree);
635 extern void check_function_arguments (tree, tree);
636 extern void check_function_arguments_recurse (void (*)
638 unsigned HOST_WIDE_INT),
640 unsigned HOST_WIDE_INT);
641 extern void check_function_format (tree, tree);
642 extern void set_Wformat (int);
643 extern tree handle_format_attribute (tree *, tree, tree, int, bool *);
644 extern tree handle_format_arg_attribute (tree *, tree, tree, int, bool *);
645 extern int c_common_handle_option (size_t code, const char *arg, int value);
646 extern bool c_common_missing_argument (const char *opt, size_t code);
647 extern tree c_common_type_for_mode (enum machine_mode, int);
648 extern tree c_common_type_for_size (unsigned int, int);
649 extern tree c_common_unsigned_type (tree);
650 extern tree c_common_signed_type (tree);
651 extern tree c_common_signed_or_unsigned_type (int, tree);
652 extern tree c_common_truthvalue_conversion (tree);
653 extern void c_apply_type_quals_to_decl (int, tree);
654 extern tree c_sizeof_or_alignof_type (tree, enum tree_code, int);
655 extern tree c_alignof_expr (tree);
656 /* Print an error message for invalid operands to arith operation CODE.
657 NOP_EXPR is used as a special case (see truthvalue_conversion). */
658 extern void binary_op_error (enum tree_code);
659 extern tree fix_string_type (tree);
660 struct varray_head_tag;
661 extern void constant_expression_warning (tree);
662 extern tree convert_and_check (tree, tree);
663 extern void overflow_warning (tree);
664 extern void unsigned_conversion_warning (tree, tree);
665 extern bool c_determine_visibility (tree);
667 #define c_sizeof(T) c_sizeof_or_alignof_type (T, SIZEOF_EXPR, 1)
668 #define c_alignof(T) c_sizeof_or_alignof_type (T, ALIGNOF_EXPR, 1)
670 /* Subroutine of build_binary_op, used for comparison operations.
671 See if the operands have both been converted from subword integer types
672 and, if so, perhaps change them both back to their original type. */
673 extern tree shorten_compare (tree *, tree *, tree *, enum tree_code *);
675 extern tree pointer_int_sum (enum tree_code, tree, tree);
676 extern unsigned int min_precision (tree, int);
678 /* Add qualifiers to a type, in the fashion for C. */
679 extern tree c_build_qualified_type (tree, int);
681 /* Build tree nodes and builtin functions common to both C and C++ language
683 extern void c_common_nodes_and_builtins (void);
685 extern void set_builtin_user_assembler_name (tree decl, const char *asmspec);
687 extern void disable_builtin_function (const char *);
689 extern tree build_va_arg (tree, tree);
691 extern unsigned int c_common_init_options (unsigned int, const char **);
692 extern bool c_common_post_options (const char **);
693 extern bool c_common_init (void);
694 extern void c_common_finish (void);
695 extern void c_common_parse_file (int);
696 extern HOST_WIDE_INT c_common_get_alias_set (tree);
697 extern void c_register_builtin_type (tree, const char*);
698 extern bool c_promoting_integer_type_p (tree);
699 extern int self_promoting_args_p (tree);
700 extern tree strip_array_types (tree);
701 extern tree strip_pointer_operator (tree);
702 extern HOST_WIDE_INT c_common_to_target_charset (HOST_WIDE_INT);
704 /* This is the basic parsing function. */
705 extern void c_parse_file (void);
706 /* This is misnamed, it actually performs end-of-compilation processing. */
707 extern void finish_file (void);
710 /* These macros provide convenient access to the various _STMT nodes. */
712 /* Nonzero if this statement should be considered a full-expression,
713 i.e., if temporaries created during this statement should have
714 their destructors run at the end of this statement. (In C, this
715 will always be false, since there are no destructors.) */
716 #define STMT_IS_FULL_EXPR_P(NODE) TREE_LANG_FLAG_1 ((NODE))
718 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
719 if a statement expression. */
720 #define STATEMENT_LIST_STMT_EXPR(NODE) \
721 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
723 /* Nonzero if a label has been added to the statement list. */
724 #define STATEMENT_LIST_HAS_LABEL(NODE) \
725 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
727 /* WHILE_STMT accessors. These give access to the condition of the
728 while statement and the body of the while statement, respectively. */
729 #define WHILE_COND(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 0)
730 #define WHILE_BODY(NODE) TREE_OPERAND (WHILE_STMT_CHECK (NODE), 1)
732 /* DO_STMT accessors. These give access to the condition of the do
733 statement and the body of the do statement, respectively. */
734 #define DO_COND(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 0)
735 #define DO_BODY(NODE) TREE_OPERAND (DO_STMT_CHECK (NODE), 1)
737 /* EXPR_STMT accessor. This gives the expression associated with an
738 expression statement. */
739 #define EXPR_STMT_EXPR(NODE) TREE_OPERAND (EXPR_STMT_CHECK (NODE), 0)
741 /* FOR_STMT accessors. These give access to the init statement,
742 condition, update expression, and body of the for statement,
744 #define FOR_INIT_STMT(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 0)
745 #define FOR_COND(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 1)
746 #define FOR_EXPR(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 2)
747 #define FOR_BODY(NODE) TREE_OPERAND (FOR_STMT_CHECK (NODE), 3)
749 #define SWITCH_STMT_COND(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 0)
750 #define SWITCH_STMT_BODY(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 1)
751 #define SWITCH_STMT_TYPE(NODE) TREE_OPERAND (SWITCH_STMT_CHECK (NODE), 2)
753 /* STMT_EXPR accessor. */
754 #define STMT_EXPR_STMT(NODE) TREE_OPERAND (STMT_EXPR_CHECK (NODE), 0)
756 /* Nonzero if this statement-expression does not have an associated scope. */
757 #define STMT_EXPR_NO_SCOPE(NODE) \
758 TREE_LANG_FLAG_0 (STMT_EXPR_CHECK (NODE))
760 /* COMPOUND_LITERAL_EXPR accessors. */
761 #define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \
762 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
763 #define COMPOUND_LITERAL_EXPR_DECL(NODE) \
764 DECL_EXPR_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
766 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
769 C_DUMMY_TREE_CODE = LAST_AND_UNUSED_TREE_CODE,
770 #include "c-common.def"
776 #define c_common_stmt_codes \
777 EXPR_STMT, FOR_STMT, \
778 WHILE_STMT, DO_STMT, \
779 BREAK_STMT, CONTINUE_STMT, SWITCH_STMT
781 /* TRUE if a code represents a statement. The front end init
782 langhook should take care of initialization of this array. */
783 extern bool statement_code_p[MAX_TREE_CODES];
785 #define STATEMENT_CODE_P(CODE) statement_code_p[(int) (CODE)]
787 #define INIT_STATEMENT_CODES(STMT_CODES) \
790 memset (&statement_code_p, 0, sizeof (statement_code_p)); \
791 for (i = 0; i < ARRAY_SIZE (STMT_CODES); i++) \
792 statement_code_p[STMT_CODES[i]] = true; \
795 extern int stmts_are_full_exprs_p (void);
796 extern int anon_aggr_type_p (tree);
798 /* For a VAR_DECL that is an anonymous union, these are the various
799 sub-variables that make up the anonymous union. */
800 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
802 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
803 #define DECL_C_BIT_FIELD(NODE) \
804 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
805 #define SET_DECL_C_BIT_FIELD(NODE) \
806 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
807 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
808 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
810 extern void emit_local_var (tree);
811 extern tree do_case (tree, tree);
812 extern tree build_stmt (enum tree_code, ...);
813 extern tree build_case_label (tree, tree, tree);
814 extern tree build_continue_stmt (void);
815 extern tree build_break_stmt (void);
817 /* These functions must be defined by each front-end which implements
818 a variant of the C language. They are used in c-common.c. */
820 extern tree build_unary_op (enum tree_code, tree, int);
821 extern tree build_binary_op (enum tree_code, tree, tree, int);
822 extern int lvalue_p (tree);
823 extern tree default_conversion (tree);
825 /* Given two integer or real types, return the type for their sum.
826 Given two compatible ANSI C types, returns the merged type. */
828 extern tree common_type (tree, tree);
830 extern tree decl_constant_value (tree);
832 /* Handle increment and decrement of boolean types. */
833 extern tree boolean_increment (enum tree_code, tree);
835 extern int case_compare (splay_tree_key, splay_tree_key);
837 extern tree c_add_case_label (splay_tree, tree, tree, tree, tree);
839 extern void c_do_switch_warnings (splay_tree, tree);
841 extern tree build_function_call (tree, tree);
843 extern tree finish_label_address_expr (tree);
845 /* Same function prototype, but the C and C++ front ends have
846 different implementations. Used in c-common.c. */
847 extern tree lookup_label (tree);
849 extern int vector_types_convertible_p (tree t1, tree t2);
851 extern rtx c_expand_expr (tree, rtx, enum machine_mode, int, rtx *);
853 extern tree c_staticp (tree);
855 extern void init_c_lex (void);
857 extern void c_cpp_builtins (cpp_reader *);
859 /* Positive if an implicit `extern "C"' scope has just been entered;
860 negative if such a scope has just been exited. */
861 extern GTY(()) int pending_lang_change;
863 /* Information recorded about each file examined during compilation. */
867 int time; /* Time spent in the file. */
869 /* Flags used only by C++.
870 INTERFACE_ONLY nonzero means that we are in an "interface" section
871 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust
872 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and
873 INTERFACE_ONLY is zero, it means that we are responsible for
874 exporting definitions that others might need. */
875 short interface_only;
876 short interface_unknown;
879 struct c_fileinfo *get_fileinfo (const char *);
880 extern void dump_time_statistics (void);
882 extern bool c_dump_tree (void *, tree);
884 extern void c_warn_unused_result (tree *);
886 extern void verify_sequence_points (tree);
888 extern tree fold_offsetof (tree);
890 /* Places where an lvalue, or modifiable lvalue, may be required.
891 Used to select diagnostic messages in lvalue_or_else and
901 extern int lvalue_or_else (tree, enum lvalue_use);
903 extern int complete_array_type (tree *, tree, bool);
905 /* In c-gimplify.c */
906 extern void c_genericize (tree);
907 extern int c_gimplify_expr (tree *, tree *, tree *);
908 extern tree c_build_bind_expr (tree, tree);
911 extern void pch_init (void);
912 extern int c_common_valid_pch (cpp_reader *pfile, const char *name, int fd);
913 extern void c_common_read_pch (cpp_reader *pfile, const char *name, int fd,
915 extern void c_common_write_pch (void);
916 extern void c_common_no_more_pch (void);
917 extern void c_common_pch_pragma (cpp_reader *pfile);
919 extern void builtin_define_with_value (const char *, const char *, int);
920 extern void c_stddef_cpp_builtins (void);
921 extern void fe_file_change (const struct line_map *);
922 extern void c_parse_error (const char *, enum cpp_ttype, tree);
924 /* Objective-C / Objective-C++ entry points. */
926 /* The following ObjC/ObjC++ functions are called by the C and/or C++
927 front-ends; they all must have corresponding stubs in stub-objc.c. */
928 extern tree objc_is_class_name (tree);
929 extern tree objc_is_object_ptr (tree);
930 extern void objc_check_decl (tree);
931 extern int objc_is_reserved_word (tree);
932 extern int objc_comptypes (tree, tree, int);
933 extern tree objc_message_selector (void);
934 extern tree objc_lookup_ivar (tree, tree);
935 extern void objc_clear_super_receiver (void);
936 extern int objc_is_public (tree, tree);
937 extern tree objc_is_id (tree);
938 extern void objc_declare_alias (tree, tree);
939 extern void objc_declare_class (tree);
940 extern void objc_declare_protocols (tree);
941 extern tree objc_build_message_expr (tree);
942 extern tree objc_finish_message_expr (tree, tree, tree);
943 extern tree objc_build_selector_expr (tree);
944 extern tree objc_build_protocol_expr (tree);
945 extern tree objc_build_encode_expr (tree);
946 extern tree objc_build_string_object (tree);
947 extern tree objc_get_protocol_qualified_type (tree, tree);
948 extern tree objc_get_class_reference (tree);
949 extern tree objc_get_class_ivars (tree);
950 extern void objc_start_class_interface (tree, tree, tree);
951 extern void objc_start_category_interface (tree, tree, tree);
952 extern void objc_start_protocol (tree, tree);
953 extern void objc_continue_interface (void);
954 extern void objc_finish_interface (void);
955 extern void objc_start_class_implementation (tree, tree);
956 extern void objc_start_category_implementation (tree, tree);
957 extern void objc_continue_implementation (void);
958 extern void objc_finish_implementation (void);
959 extern void objc_set_visibility (int);
960 extern void objc_set_method_type (enum tree_code);
961 extern tree objc_build_method_signature (tree, tree, tree);
962 extern void objc_add_method_declaration (tree);
963 extern void objc_start_method_definition (tree);
964 extern void objc_finish_method_definition (tree);
965 extern void objc_add_instance_variable (tree);
966 extern tree objc_build_keyword_decl (tree, tree, tree);
967 extern tree objc_build_throw_stmt (tree);
968 extern void objc_begin_try_stmt (location_t, tree);
969 extern void objc_finish_try_stmt (void);
970 extern void objc_begin_catch_clause (tree);
971 extern void objc_finish_catch_clause (void);
972 extern void objc_build_finally_clause (location_t, tree);
973 extern void objc_build_synchronized (location_t, tree, tree);
974 extern int objc_static_init_needed_p (void);
975 extern tree objc_generate_static_init_call (tree);
977 /* The following are provided by the C and C++ front-ends, and called by
979 extern void *objc_get_current_scope (void);
980 extern void objc_mark_locals_volatile (void *);
982 /* In c-ppoutput.c */
983 extern void init_pp_output (FILE *);
984 extern void preprocess_file (cpp_reader *);
985 extern void pp_file_change (const struct line_map *);
986 extern void pp_dir_change (cpp_reader *, const char *);
988 #endif /* ! GCC_C_COMMON_H */