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_HAS_NOTHROW_ASSIGN
, RID_HAS_NOTHROW_CONSTRUCTOR
,
95 RID_HAS_NOTHROW_COPY
, RID_HAS_TRIVIAL_ASSIGN
,
96 RID_HAS_TRIVIAL_CONSTRUCTOR
, RID_HAS_TRIVIAL_COPY
,
97 RID_HAS_TRIVIAL_DESTRUCTOR
, RID_HAS_VIRTUAL_DESTRUCTOR
,
98 RID_IS_ABSTRACT
, RID_IS_BASE_OF
,
99 RID_IS_CONVERTIBLE_TO
, RID_IS_CLASS
,
100 RID_IS_EMPTY
, RID_IS_ENUM
,
101 RID_IS_POD
, RID_IS_POLYMORPHIC
,
108 RID_AT_ENCODE
, RID_AT_END
,
109 RID_AT_CLASS
, RID_AT_ALIAS
, RID_AT_DEFS
,
110 RID_AT_PRIVATE
, RID_AT_PROTECTED
, RID_AT_PUBLIC
,
111 RID_AT_PROTOCOL
, RID_AT_SELECTOR
,
112 RID_AT_THROW
, RID_AT_TRY
, RID_AT_CATCH
,
113 RID_AT_FINALLY
, RID_AT_SYNCHRONIZED
,
115 RID_AT_IMPLEMENTATION
,
119 RID_FIRST_MODIFIER
= RID_STATIC
,
120 RID_LAST_MODIFIER
= RID_ONEWAY
,
122 RID_FIRST_CXX0X
= RID_STATIC_ASSERT
,
123 RID_LAST_CXX0X
= RID_STATIC_ASSERT
,
124 RID_FIRST_AT
= RID_AT_ENCODE
,
125 RID_LAST_AT
= RID_AT_IMPLEMENTATION
,
126 RID_FIRST_PQ
= RID_IN
,
127 RID_LAST_PQ
= RID_ONEWAY
130 #define OBJC_IS_AT_KEYWORD(rid) \
131 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_AT && \
132 (unsigned int) (rid) <= (unsigned int) RID_LAST_AT)
134 #define OBJC_IS_PQ_KEYWORD(rid) \
135 ((unsigned int) (rid) >= (unsigned int) RID_FIRST_PQ && \
136 (unsigned int) (rid) <= (unsigned int) RID_LAST_PQ)
138 /* The elements of `ridpointers' are identifier nodes for the reserved
139 type names and storage classes. It is indexed by a RID_... value. */
140 extern GTY ((length ("(int) RID_MAX"))) tree
*ridpointers
;
142 /* Standard named or nameless data types of the C compiler. */
147 CTI_SIGNED_WCHAR_TYPE
,
148 CTI_UNSIGNED_WCHAR_TYPE
,
150 CTI_SIGNED_SIZE_TYPE
, /* For format checking only. */
151 CTI_UNSIGNED_PTRDIFF_TYPE
, /* For format checking only. */
154 CTI_WIDEST_INT_LIT_TYPE
,
155 CTI_WIDEST_UINT_LIT_TYPE
,
158 CTI_WCHAR_ARRAY_TYPE
,
161 CTI_CONST_STRING_TYPE
,
163 /* Type for boolean expressions (bool in C++, int in C). */
166 CTI_TRUTHVALUE_FALSE
,
168 CTI_DEFAULT_FUNCTION_TYPE
,
170 /* These are not types, but we have to look them up all the time. */
171 CTI_FUNCTION_NAME_DECL
,
172 CTI_PRETTY_FUNCTION_NAME_DECL
,
173 CTI_C99_FUNCTION_NAME_DECL
,
174 CTI_SAVED_FUNCTION_NAME_DECLS
,
183 #define C_RID_CODE(id) (((struct c_common_identifier *) (id))->node.rid_code)
185 /* Identifier part common to the C front ends. Inherits from
186 tree_identifier, despite appearances. */
187 struct c_common_identifier
GTY(())
189 struct tree_common common
;
190 struct cpp_hashnode node
;
193 #define wchar_type_node c_global_trees[CTI_WCHAR_TYPE]
194 #define signed_wchar_type_node c_global_trees[CTI_SIGNED_WCHAR_TYPE]
195 #define unsigned_wchar_type_node c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
196 #define wint_type_node c_global_trees[CTI_WINT_TYPE]
197 #define signed_size_type_node c_global_trees[CTI_SIGNED_SIZE_TYPE]
198 #define unsigned_ptrdiff_type_node c_global_trees[CTI_UNSIGNED_PTRDIFF_TYPE]
199 #define intmax_type_node c_global_trees[CTI_INTMAX_TYPE]
200 #define uintmax_type_node c_global_trees[CTI_UINTMAX_TYPE]
201 #define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
202 #define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]
204 #define truthvalue_type_node c_global_trees[CTI_TRUTHVALUE_TYPE]
205 #define truthvalue_true_node c_global_trees[CTI_TRUTHVALUE_TRUE]
206 #define truthvalue_false_node c_global_trees[CTI_TRUTHVALUE_FALSE]
208 #define char_array_type_node c_global_trees[CTI_CHAR_ARRAY_TYPE]
209 #define wchar_array_type_node c_global_trees[CTI_WCHAR_ARRAY_TYPE]
210 #define int_array_type_node c_global_trees[CTI_INT_ARRAY_TYPE]
211 #define string_type_node c_global_trees[CTI_STRING_TYPE]
212 #define const_string_type_node c_global_trees[CTI_CONST_STRING_TYPE]
214 #define default_function_type c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
216 #define function_name_decl_node c_global_trees[CTI_FUNCTION_NAME_DECL]
217 #define pretty_function_name_decl_node c_global_trees[CTI_PRETTY_FUNCTION_NAME_DECL]
218 #define c99_function_name_decl_node c_global_trees[CTI_C99_FUNCTION_NAME_DECL]
219 #define saved_function_name_decls c_global_trees[CTI_SAVED_FUNCTION_NAME_DECLS]
221 /* A node for `((void) 0)'. */
222 #define void_zero_node c_global_trees[CTI_VOID_ZERO]
224 /* The node for C++ `__null'. */
225 #define null_node c_global_trees[CTI_NULL]
227 extern GTY(()) tree c_global_trees
[CTI_MAX
];
229 /* In a RECORD_TYPE, a sorted array of the fields of the type, not a
230 tree for size reasons. */
231 struct sorted_fields_type
GTY(())
234 tree
GTY((length ("%h.len"))) elts
[1];
237 /* Mark which labels are explicitly declared.
238 These may be shadowed, and may be referenced from nested functions. */
239 #define C_DECLARED_LABEL_FLAG(label) TREE_LANG_FLAG_1 (label)
241 typedef enum c_language_kind
243 clk_c
= 0, /* C90, C94 or C99 */
244 clk_objc
= 1, /* clk_c with ObjC features. */
245 clk_cxx
= 2, /* ANSI/ISO C++ */
246 clk_objcxx
= 3 /* clk_cxx with ObjC features. */
250 /* To test for a specific language use c_language, defined by each
251 front end. For "ObjC features" or "not C++" use the macros. */
252 extern c_language_kind c_language
;
254 #define c_dialect_cxx() (c_language & clk_cxx)
255 #define c_dialect_objc() (c_language & clk_objc)
257 extern bool lang_fortran
;
259 /* Information about a statement tree. */
261 struct stmt_tree_s
GTY(()) {
262 /* The current statement list being collected. */
263 tree x_cur_stmt_list
;
265 /* In C++, Nonzero if we should treat statements as full
266 expressions. In particular, this variable is no-zero if at the
267 end of a statement we should destroy any temporaries created
268 during that statement. Similarly, if, at the end of a block, we
269 should destroy any local variables in this block. Normally, this
270 variable is nonzero, since those are the normal semantics of
273 However, in order to represent aggregate initialization code as
274 tree structure, we use statement-expressions. The statements
275 within the statement expression should not result in cleanups
276 being run until the entire enclosing statement is complete.
278 This flag has no effect in C. */
279 int stmts_are_full_exprs_p
;
282 typedef struct stmt_tree_s
*stmt_tree
;
284 /* Global state pertinent to the current function. Some C dialects
285 extend this structure with additional fields. */
287 struct c_language_function
GTY(()) {
288 /* While we are parsing the function, this contains information
289 about the statement-tree that we are building. */
290 struct stmt_tree_s x_stmt_tree
;
293 /* When building a statement-tree, this is the current statement list
294 being collected. It's TREE_CHAIN is a back-pointer to the previous
297 #define cur_stmt_list (current_stmt_tree ()->x_cur_stmt_list)
299 /* Language-specific hooks. */
301 /* Callback that determines if it's ok for a function to have no
302 noreturn attribute. */
303 extern int (*lang_missing_noreturn_ok_p
) (tree
);
305 /* If non-NULL, this function is called after a precompile header file
307 extern void (*lang_post_pch_load
) (void);
309 extern void push_file_scope (void);
310 extern void pop_file_scope (void);
311 extern stmt_tree
current_stmt_tree (void);
312 extern tree
push_stmt_list (void);
313 extern tree
pop_stmt_list (tree
);
314 extern tree
add_stmt (tree
);
315 extern void push_cleanup (tree
, tree
, bool);
316 extern tree
pushdecl_top_level (tree
);
317 extern tree
pushdecl (tree
);
318 extern tree
build_modify_expr (tree
, enum tree_code
, tree
);
319 extern tree
build_indirect_ref (tree
, const char *);
321 extern int c_expand_decl (tree
);
323 extern int field_decl_cmp (const void *, const void *);
324 extern void resort_sorted_fields (void *, void *, gt_pointer_operator
,
326 extern bool has_c_linkage (tree decl
);
328 /* Switches common to the C front ends. */
330 /* Nonzero if prepreprocessing only. */
332 extern int flag_preprocess_only
;
334 /* Zero means that faster, ...NonNil variants of objc_msgSend...
335 calls will be used in ObjC; passing nil receivers to such calls
336 will most likely result in crashes. */
337 extern int flag_nil_receivers
;
339 /* Nonzero means that we will allow new ObjC exception syntax (@throw,
340 @try, etc.) in source code. */
341 extern int flag_objc_exceptions
;
343 /* Nonzero means that we generate NeXT setjmp based exceptions. */
344 extern int flag_objc_sjlj_exceptions
;
346 /* Nonzero means that code generation will be altered to support
347 "zero-link" execution. This currently affects ObjC only, but may
348 affect other languages in the future. */
349 extern int flag_zero_link
;
351 /* Nonzero means emit an '__OBJC, __image_info' for the current translation
352 unit. It will inform the ObjC runtime that class definition(s) herein
353 contained are to replace one(s) previously loaded. */
354 extern int flag_replace_objc_classes
;
356 /* Nonzero means don't output line number information. */
358 extern char flag_no_line_commands
;
360 /* Nonzero causes -E output not to be done, but directives such as
361 #define that have side effects are still obeyed. */
363 extern char flag_no_output
;
365 /* Nonzero means dump macros in some fashion; contains the 'D', 'M' or
366 'N' of the command line switch. */
368 extern char flag_dump_macros
;
370 /* Nonzero means pass #include lines through to the output. */
372 extern char flag_dump_includes
;
374 /* Nonzero means process PCH files while preprocessing. */
376 extern bool flag_pch_preprocess
;
378 /* The file name to which we should write a precompiled header, or
379 NULL if no header will be written in this compile. */
381 extern const char *pch_file
;
383 /* Nonzero if an ISO standard was selected. It rejects macros in the
388 /* Nonzero if -undef was given. It suppresses target built-in macros
391 extern int flag_undef
;
393 /* Nonzero means don't recognize the non-ANSI builtin functions. */
395 extern int flag_no_builtin
;
397 /* Nonzero means don't recognize the non-ANSI builtin functions.
400 extern int flag_no_nonansi_builtin
;
402 /* Nonzero means give `double' the same size as `float'. */
404 extern int flag_short_double
;
406 /* Nonzero means give `wchar_t' the same size as `short'. */
408 extern int flag_short_wchar
;
410 /* Nonzero means allow implicit conversions between vectors with
411 differing numbers of subparts and/or differing element types. */
412 extern int flag_lax_vector_conversions
;
414 /* Nonzero means allow Microsoft extensions without warnings or errors. */
415 extern int flag_ms_extensions
;
417 /* Nonzero means don't recognize the keyword `asm'. */
419 extern int flag_no_asm
;
421 /* Nonzero means give string constants the type `const char *', as mandated
424 extern int flag_const_strings
;
426 /* Nonzero means to treat bitfields as signed unless they say `unsigned'. */
428 extern int flag_signed_bitfields
;
430 /* Warn about #pragma directives that are not recognized. */
432 extern int warn_unknown_pragmas
; /* Tri state variable. */
434 /* Warn about format/argument anomalies in calls to formatted I/O functions
435 (*printf, *scanf, strftime, strfmon, etc.). */
437 extern int warn_format
;
440 /* C/ObjC language option variables. */
443 /* Nonzero means allow type mismatches in conditional expressions;
444 just make their values `void'. */
446 extern int flag_cond_mismatch
;
448 /* Nonzero means enable C89 Amendment 1 features. */
450 extern int flag_isoc94
;
452 /* Nonzero means use the ISO C99 dialect of C. */
454 extern int flag_isoc99
;
456 /* Nonzero means that we have builtin functions, and main is an int. */
458 extern int flag_hosted
;
460 /* Warn if main is suspicious. */
462 extern int warn_main
;
465 /* ObjC language option variables. */
468 /* Open and close the file for outputting class declarations, if
471 extern int flag_gen_declaration
;
473 /* Tells the compiler that this is a special run. Do not perform any
474 compiling, instead we are to test some platform dependent features
475 and output a C header file with appropriate definitions. */
477 extern int print_struct_values
;
479 /* ???. Undocumented. */
481 extern const char *constant_string_class_name
;
484 /* C++ language option variables. */
487 /* Nonzero means don't recognize any extension keywords. */
489 extern int flag_no_gnu_keywords
;
491 /* Nonzero means do emit exported implementations of functions even if
492 they can be inlined. */
494 extern int flag_implement_inlines
;
496 /* Nonzero means that implicit instantiations will be emitted if needed. */
498 extern int flag_implicit_templates
;
500 /* Nonzero means that implicit instantiations of inline templates will be
501 emitted if needed, even if instantiations of non-inline templates
504 extern int flag_implicit_inline_templates
;
506 /* Nonzero means generate separate instantiation control files and
507 juggle them at link time. */
509 extern int flag_use_repository
;
511 /* Nonzero if we want to issue diagnostics that the standard says are not
514 extern int flag_optional_diags
;
516 /* Nonzero means we should attempt to elide constructors when possible. */
518 extern int flag_elide_constructors
;
520 /* Nonzero means that member functions defined in class scope are
521 inline by default. */
523 extern int flag_default_inline
;
525 /* Controls whether compiler generates 'type descriptor' that give
526 run-time type information. */
528 extern int flag_rtti
;
530 /* Nonzero if we want to conserve space in the .o files. We do this
531 by putting uninitialized data and runtime initialized data into
532 .common instead of .data at the expense of not flagging multiple
535 extern int flag_conserve_space
;
537 /* Nonzero if we want to obey access control semantics. */
539 extern int flag_access_control
;
541 /* Nonzero if we want to check the return value of new and avoid calling
542 constructors if it is a null pointer. */
544 extern int flag_check_new
;
546 /* Nonzero if we want to allow the use of experimental features that
547 are likely to become part of C++0x. */
549 extern int flag_cpp0x
;
551 /* Nonzero if we want the new ISO rules for pushing a new scope for `for'
552 initialization variables.
553 0: Old rules, set by -fno-for-scope.
554 2: New ISO rules, set by -ffor-scope.
555 1: Try to implement new ISO rules, but with backup compatibility
556 (and warnings). This is the default, for now. */
558 extern int flag_new_for_scope
;
560 /* Nonzero if we want to emit defined symbols with common-like linkage as
561 weak symbols where possible, in order to conform to C++ semantics.
562 Otherwise, emit them as local symbols. */
564 extern int flag_weak
;
566 /* 0 means we want the preprocessor to not emit line directives for
567 the current working directory. 1 means we want it to do it. -1
568 means we should decide depending on whether debugging information
569 is being emitted or not. */
571 extern int flag_working_directory
;
573 /* Nonzero to use __cxa_atexit, rather than atexit, to register
574 destructors for local statics and global objects. */
576 extern int flag_use_cxa_atexit
;
578 /* Nonzero to use __cxa_get_exception_ptr in the C++ exception-handling
581 extern int flag_use_cxa_get_exception_ptr
;
583 /* Nonzero means make the default pedwarns warnings instead of errors.
584 The value of this flag is ignored if -pedantic is specified. */
586 extern int flag_permissive
;
588 /* Nonzero means to implement standard semantics for exception
589 specifications, calling unexpected if an exception is thrown that
590 doesn't match the specification. Zero means to treat them as
591 assertions and optimize accordingly, but not check them. */
593 extern int flag_enforce_eh_specs
;
595 /* Nonzero (the default) means to generate thread-safe code for
596 initializing local statics. */
598 extern int flag_threadsafe_statics
;
600 /* Nonzero means warn about implicit declarations. */
602 extern int warn_implicit
;
604 /* Warn about using __null (as NULL in C++) as sentinel. For code compiled
605 with GCC this doesn't matter as __null is guaranteed to have the right
608 extern int warn_strict_null_sentinel
;
610 /* Maximum template instantiation depth. This limit is rather
611 arbitrary, but it exists to limit the time it takes to notice
612 infinite template instantiations. */
614 extern int max_tinst_depth
;
616 /* Nonzero means the expression being parsed will never be evaluated.
617 This is a count, since unevaluated expressions can nest. */
619 extern int skip_evaluation
;
621 /* C types are partitioned into three subsets: object, function, and
623 #define C_TYPE_OBJECT_P(type) \
624 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type))
626 #define C_TYPE_INCOMPLETE_P(type) \
627 (TREE_CODE (type) != FUNCTION_TYPE && TYPE_SIZE (type) == 0)
629 #define C_TYPE_FUNCTION_P(type) \
630 (TREE_CODE (type) == FUNCTION_TYPE)
632 /* For convenience we define a single macro to identify the class of
633 object or incomplete types. */
634 #define C_TYPE_OBJECT_OR_INCOMPLETE_P(type) \
635 (!C_TYPE_FUNCTION_P (type))
637 /* Attribute table common to the C front ends. */
638 extern const struct attribute_spec c_common_attribute_table
[];
639 extern const struct attribute_spec c_common_format_attribute_table
[];
641 /* Pointer to function to lazily generate the VAR_DECL for __FUNCTION__ etc.
642 ID is the identifier to use, NAME is the string.
643 TYPE_DEP indicates whether it depends on type of the function or not
644 (i.e. __PRETTY_FUNCTION__). */
646 extern tree (*make_fname_decl
) (tree
, int);
648 extern tree
identifier_global_value (tree
);
649 extern void record_builtin_type (enum rid
, const char *, tree
);
650 extern tree
build_void_list_node (void);
651 extern void start_fname_decls (void);
652 extern void finish_fname_decls (void);
653 extern const char *fname_as_string (int);
654 extern tree
fname_decl (unsigned, tree
);
656 extern void check_function_arguments (tree
, int, tree
*, tree
);
657 extern void check_function_arguments_recurse (void (*)
659 unsigned HOST_WIDE_INT
),
661 unsigned HOST_WIDE_INT
);
662 extern void check_function_format (tree
, int, tree
*);
663 extern void set_Wformat (int);
664 extern tree
handle_format_attribute (tree
*, tree
, tree
, int, bool *);
665 extern tree
handle_format_arg_attribute (tree
*, tree
, tree
, int, bool *);
666 extern int c_common_handle_option (size_t code
, const char *arg
, int value
);
667 extern bool c_common_missing_argument (const char *opt
, size_t code
);
668 extern tree
c_common_type_for_mode (enum machine_mode
, int);
669 extern tree
c_common_type_for_size (unsigned int, int);
670 extern tree
c_common_signed_type (tree
);
671 extern tree
c_common_signed_or_unsigned_type (int, tree
);
672 extern tree
c_build_bitfield_integer_type (unsigned HOST_WIDE_INT
, int);
673 extern bool decl_with_nonnull_addr_p (tree
);
674 extern tree
c_common_truthvalue_conversion (tree
);
675 extern void c_apply_type_quals_to_decl (int, tree
);
676 extern tree
c_sizeof_or_alignof_type (tree
, bool, int);
677 extern tree
c_alignof_expr (tree
);
678 /* Print an error message for invalid operands to arith operation CODE.
679 NOP_EXPR is used as a special case (see truthvalue_conversion). */
680 extern void binary_op_error (enum tree_code
, tree
, tree
);
681 extern tree
fix_string_type (tree
);
682 struct varray_head_tag
;
683 extern void constant_expression_warning (tree
);
684 extern bool strict_aliasing_warning (tree
, tree
, tree
);
685 extern void empty_if_body_warning (tree
, tree
);
686 extern void warnings_for_convert_and_check (tree
, tree
, tree
);
687 extern tree
convert_and_check (tree
, tree
);
688 extern void overflow_warning (tree
);
689 extern void warn_logical_operator (enum tree_code
, tree
, tree
);
690 extern void check_main_parameter_types (tree decl
);
691 extern bool c_determine_visibility (tree
);
692 extern bool same_scalar_type_ignoring_signedness (tree
, tree
);
694 #define c_sizeof(T) c_sizeof_or_alignof_type (T, true, 1)
695 #define c_alignof(T) c_sizeof_or_alignof_type (T, false, 1)
697 /* Subroutine of build_binary_op, used for comparison operations.
698 See if the operands have both been converted from subword integer types
699 and, if so, perhaps change them both back to their original type. */
700 extern tree
shorten_compare (tree
*, tree
*, tree
*, enum tree_code
*);
702 extern tree
pointer_int_sum (enum tree_code
, tree
, tree
);
703 extern unsigned int min_precision (tree
, int);
705 /* Add qualifiers to a type, in the fashion for C. */
706 extern tree
c_build_qualified_type (tree
, int);
708 /* Build tree nodes and builtin functions common to both C and C++ language
710 extern void c_common_nodes_and_builtins (void);
712 extern void set_builtin_user_assembler_name (tree decl
, const char *asmspec
);
714 extern void disable_builtin_function (const char *);
716 extern void set_compound_literal_name (tree decl
);
718 extern tree
build_va_arg (tree
, tree
);
720 extern unsigned int c_common_init_options (unsigned int, const char **);
721 extern bool c_common_post_options (const char **);
722 extern bool c_common_init (void);
723 extern void c_common_finish (void);
724 extern void c_common_parse_file (int);
725 extern HOST_WIDE_INT
c_common_get_alias_set (tree
);
726 extern void c_register_builtin_type (tree
, const char*);
727 extern bool c_promoting_integer_type_p (tree
);
728 extern int self_promoting_args_p (tree
);
729 extern tree
strip_array_types (tree
);
730 extern tree
strip_pointer_operator (tree
);
731 extern tree
strip_pointer_or_array_types (tree
);
732 extern HOST_WIDE_INT
c_common_to_target_charset (HOST_WIDE_INT
);
734 /* This is the basic parsing function. */
735 extern void c_parse_file (void);
736 /* This is misnamed, it actually performs end-of-compilation processing. */
737 extern void finish_file (void);
740 /* These macros provide convenient access to the various _STMT nodes. */
742 /* Nonzero if a given STATEMENT_LIST represents the outermost binding
743 if a statement expression. */
744 #define STATEMENT_LIST_STMT_EXPR(NODE) \
745 TREE_LANG_FLAG_1 (STATEMENT_LIST_CHECK (NODE))
747 /* Nonzero if a label has been added to the statement list. */
748 #define STATEMENT_LIST_HAS_LABEL(NODE) \
749 TREE_LANG_FLAG_3 (STATEMENT_LIST_CHECK (NODE))
751 /* COMPOUND_LITERAL_EXPR accessors. */
752 #define COMPOUND_LITERAL_EXPR_DECL_STMT(NODE) \
753 TREE_OPERAND (COMPOUND_LITERAL_EXPR_CHECK (NODE), 0)
754 #define COMPOUND_LITERAL_EXPR_DECL(NODE) \
755 DECL_EXPR_DECL (COMPOUND_LITERAL_EXPR_DECL_STMT (NODE))
757 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) SYM,
760 C_DUMMY_TREE_CODE
= LAST_AND_UNUSED_TREE_CODE
,
761 #include "c-common.def"
767 extern int anon_aggr_type_p (tree
);
769 /* For a VAR_DECL that is an anonymous union, these are the various
770 sub-variables that make up the anonymous union. */
771 #define DECL_ANON_UNION_ELEMS(NODE) DECL_ARGUMENTS ((NODE))
773 /* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
774 #define DECL_C_BIT_FIELD(NODE) \
775 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) == 1)
776 #define SET_DECL_C_BIT_FIELD(NODE) \
777 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 1)
778 #define CLEAR_DECL_C_BIT_FIELD(NODE) \
779 (DECL_LANG_FLAG_4 (FIELD_DECL_CHECK (NODE)) = 0)
781 extern void emit_local_var (tree
);
782 extern tree
do_case (tree
, tree
);
783 extern tree
build_stmt (enum tree_code
, ...);
784 extern tree
build_case_label (tree
, tree
, tree
);
786 /* These functions must be defined by each front-end which implements
787 a variant of the C language. They are used in c-common.c. */
789 extern tree
build_unary_op (enum tree_code
, tree
, int);
790 extern tree
build_binary_op (enum tree_code
, tree
, tree
, int);
791 extern tree
perform_integral_promotions (tree
);
793 /* These functions must be defined by each front-end which implements
794 a variant of the C language. They are used by port files. */
796 extern tree
default_conversion (tree
);
798 /* Given two integer or real types, return the type for their sum.
799 Given two compatible ANSI C types, returns the merged type. */
801 extern tree
common_type (tree
, tree
);
803 extern tree
decl_constant_value (tree
);
805 /* Handle increment and decrement of boolean types. */
806 extern tree
boolean_increment (enum tree_code
, tree
);
808 extern int case_compare (splay_tree_key
, splay_tree_key
);
810 extern tree
c_add_case_label (splay_tree
, tree
, tree
, tree
, tree
);
812 extern void c_do_switch_warnings (splay_tree
, location_t
, tree
, tree
);
814 extern tree
build_function_call (tree
, tree
);
816 extern tree
resolve_overloaded_builtin (tree
, tree
);
818 extern tree
finish_label_address_expr (tree
);
820 /* Same function prototype, but the C and C++ front ends have
821 different implementations. Used in c-common.c. */
822 extern tree
lookup_label (tree
);
823 extern tree
lookup_name (tree
);
825 extern bool vector_types_convertible_p (tree t1
, tree t2
, bool emit_lax_note
);
827 extern rtx
c_expand_expr (tree
, rtx
, enum machine_mode
, int, rtx
*);
828 extern void c_expand_body (tree
);
830 extern tree
c_staticp (tree
);
832 extern void init_c_lex (void);
834 extern void c_cpp_builtins (cpp_reader
*);
836 /* Positive if an implicit `extern "C"' scope has just been entered;
837 negative if such a scope has just been exited. */
838 extern GTY(()) int pending_lang_change
;
840 /* Information recorded about each file examined during compilation. */
844 int time
; /* Time spent in the file. */
846 /* Flags used only by C++.
847 INTERFACE_ONLY nonzero means that we are in an "interface" section
848 of the compiler. INTERFACE_UNKNOWN nonzero means we cannot trust
849 the value of INTERFACE_ONLY. If INTERFACE_UNKNOWN is zero and
850 INTERFACE_ONLY is zero, it means that we are responsible for
851 exporting definitions that others might need. */
852 short interface_only
;
853 short interface_unknown
;
856 struct c_fileinfo
*get_fileinfo (const char *);
857 extern void dump_time_statistics (void);
859 extern bool c_dump_tree (void *, tree
);
861 extern void c_warn_unused_result (tree
*);
863 extern void verify_sequence_points (tree
);
865 extern tree
fold_offsetof (tree
, tree
);
867 /* Places where an lvalue, or modifiable lvalue, may be required.
868 Used to select diagnostic messages in lvalue_error and
878 extern void lvalue_error (enum lvalue_use
);
880 extern int complete_array_type (tree
*, tree
, bool);
882 extern tree
builtin_type_for_size (int, bool);
884 extern void warn_array_subscript_with_type_char (tree
);
885 extern void warn_about_parentheses (enum tree_code
, enum tree_code
,
887 extern void warn_for_unused_label (tree label
);
888 extern void warn_for_div_by_zero (tree divisor
);
891 /* In c-gimplify.c */
892 extern void c_genericize (tree
);
893 extern int c_gimplify_expr (tree
*, tree
*, tree
*);
894 extern tree
c_build_bind_expr (tree
, tree
);
897 extern void pch_init (void);
898 extern int c_common_valid_pch (cpp_reader
*pfile
, const char *name
, int fd
);
899 extern void c_common_read_pch (cpp_reader
*pfile
, const char *name
, int fd
,
901 extern void c_common_write_pch (void);
902 extern void c_common_no_more_pch (void);
903 extern void c_common_pch_pragma (cpp_reader
*pfile
, const char *);
904 extern void c_common_print_pch_checksum (FILE *f
);
906 /* In *-checksum.c */
907 extern const unsigned char executable_checksum
[16];
909 extern void builtin_define_with_value (const char *, const char *, int);
910 extern void c_stddef_cpp_builtins (void);
911 extern void fe_file_change (const struct line_map
*);
912 extern void c_parse_error (const char *, enum cpp_ttype
, tree
);
914 /* Objective-C / Objective-C++ entry points. */
916 /* The following ObjC/ObjC++ functions are called by the C and/or C++
917 front-ends; they all must have corresponding stubs in stub-objc.c. */
918 extern tree
objc_is_class_name (tree
);
919 extern tree
objc_is_object_ptr (tree
);
920 extern void objc_check_decl (tree
);
921 extern int objc_is_reserved_word (tree
);
922 extern bool objc_compare_types (tree
, tree
, int, tree
);
923 extern void objc_volatilize_decl (tree
);
924 extern bool objc_type_quals_match (tree
, tree
);
925 extern tree
objc_rewrite_function_call (tree
, tree
);
926 extern tree
objc_message_selector (void);
927 extern tree
objc_lookup_ivar (tree
, tree
);
928 extern void objc_clear_super_receiver (void);
929 extern int objc_is_public (tree
, tree
);
930 extern tree
objc_is_id (tree
);
931 extern void objc_declare_alias (tree
, tree
);
932 extern void objc_declare_class (tree
);
933 extern void objc_declare_protocols (tree
);
934 extern tree
objc_build_message_expr (tree
);
935 extern tree
objc_finish_message_expr (tree
, tree
, tree
);
936 extern tree
objc_build_selector_expr (tree
);
937 extern tree
objc_build_protocol_expr (tree
);
938 extern tree
objc_build_encode_expr (tree
);
939 extern tree
objc_build_string_object (tree
);
940 extern tree
objc_get_protocol_qualified_type (tree
, tree
);
941 extern tree
objc_get_class_reference (tree
);
942 extern tree
objc_get_class_ivars (tree
);
943 extern void objc_start_class_interface (tree
, tree
, tree
);
944 extern void objc_start_category_interface (tree
, tree
, tree
);
945 extern void objc_start_protocol (tree
, tree
);
946 extern void objc_continue_interface (void);
947 extern void objc_finish_interface (void);
948 extern void objc_start_class_implementation (tree
, tree
);
949 extern void objc_start_category_implementation (tree
, tree
);
950 extern void objc_continue_implementation (void);
951 extern void objc_finish_implementation (void);
952 extern void objc_set_visibility (int);
953 extern void objc_set_method_type (enum tree_code
);
954 extern tree
objc_build_method_signature (tree
, tree
, tree
, bool);
955 extern void objc_add_method_declaration (tree
);
956 extern void objc_start_method_definition (tree
);
957 extern void objc_finish_method_definition (tree
);
958 extern void objc_add_instance_variable (tree
);
959 extern tree
objc_build_keyword_decl (tree
, tree
, tree
);
960 extern tree
objc_build_throw_stmt (tree
);
961 extern void objc_begin_try_stmt (location_t
, tree
);
962 extern tree
objc_finish_try_stmt (void);
963 extern void objc_begin_catch_clause (tree
);
964 extern void objc_finish_catch_clause (void);
965 extern void objc_build_finally_clause (location_t
, tree
);
966 extern tree
objc_build_synchronized (location_t
, tree
, tree
);
967 extern int objc_static_init_needed_p (void);
968 extern tree
objc_generate_static_init_call (tree
);
969 extern tree
objc_generate_write_barrier (tree
, enum tree_code
, tree
);
971 /* The following are provided by the C and C++ front-ends, and called by
973 extern void *objc_get_current_scope (void);
974 extern void objc_mark_locals_volatile (void *);
976 /* In c-ppoutput.c */
977 extern void init_pp_output (FILE *);
978 extern void preprocess_file (cpp_reader
*);
979 extern void pp_file_change (const struct line_map
*);
980 extern void pp_dir_change (cpp_reader
*, const char *);
981 extern bool check_missing_format_attribute (tree
, tree
);
984 extern tree
c_finish_omp_master (tree
);
985 extern tree
c_finish_omp_critical (tree
, tree
);
986 extern tree
c_finish_omp_ordered (tree
);
987 extern void c_finish_omp_barrier (void);
988 extern tree
c_finish_omp_atomic (enum tree_code
, tree
, tree
);
989 extern void c_finish_omp_flush (void);
990 extern tree
c_finish_omp_for (location_t
, tree
, tree
, tree
, tree
, tree
, tree
);
991 extern void c_split_parallel_clauses (tree
, tree
*, tree
*);
992 extern enum omp_clause_default_kind
c_omp_predetermined_sharing (tree
);
994 /* Not in c-omp.c; provided by the front end. */
995 extern bool c_omp_sharing_predetermined (tree
);
996 extern tree
c_omp_remap_decl (tree
, bool);
998 /* In order for the format checking to accept the C frontend
999 diagnostic framework extensions, you must include this file before
1000 toplev.h, not after. The C front end formats are a subset of those
1001 for C++, so they are the appropriate set to use in common code;
1002 cp-tree.h overrides this for C++. */
1003 #ifndef GCC_DIAG_STYLE
1004 #define GCC_DIAG_STYLE __gcc_cdiag__
1007 #endif /* ! GCC_C_COMMON_H */