diff gcc/c-tree.h @ 0:a06113de4d67

first commit
author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
parents
children caeb520cebed 77e2b8dfacca
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/c-tree.h	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,650 @@
+/* Definitions for C parsing and type checking.
+   Copyright (C) 1987, 1993, 1994, 1995, 1997, 1998,
+   1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009
+   Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#ifndef GCC_C_TREE_H
+#define GCC_C_TREE_H
+
+#include "c-common.h"
+#include "toplev.h"
+#include "diagnostic.h"
+
+/* struct lang_identifier is private to c-decl.c, but langhooks.c needs to
+   know how big it is.  This is sanity-checked in c-decl.c.  */
+#define C_SIZEOF_STRUCT_LANG_IDENTIFIER \
+  (sizeof (struct c_common_identifier) + 3 * sizeof (void *))
+
+/* Language-specific declaration information.  */
+
+struct lang_decl GTY(())
+{
+  char dummy;
+};
+
+/* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is read-only.  */
+#define C_TYPE_FIELDS_READONLY(TYPE) TREE_LANG_FLAG_1 (TYPE)
+
+/* In a RECORD_TYPE or UNION_TYPE, nonzero if any component is volatile.  */
+#define C_TYPE_FIELDS_VOLATILE(TYPE) TREE_LANG_FLAG_2 (TYPE)
+
+/* In a RECORD_TYPE or UNION_TYPE or ENUMERAL_TYPE
+   nonzero if the definition of the type has already started.  */
+#define C_TYPE_BEING_DEFINED(TYPE) TYPE_LANG_FLAG_0 (TYPE)
+
+/* In an incomplete RECORD_TYPE or UNION_TYPE, a list of variable
+   declarations whose type would be completed by completing that type.  */
+#define C_TYPE_INCOMPLETE_VARS(TYPE) TYPE_VFIELD (TYPE)
+
+/* In an IDENTIFIER_NODE, nonzero if this identifier is actually a
+   keyword.  C_RID_CODE (node) is then the RID_* value of the keyword,
+   and C_RID_YYCODE is the token number wanted by Yacc.  */
+#define C_IS_RESERVED_WORD(ID) TREE_LANG_FLAG_0 (ID)
+
+struct lang_type GTY(())
+{
+  /* In a RECORD_TYPE, a sorted array of the fields of the type.  */
+  struct sorted_fields_type * GTY ((reorder ("resort_sorted_fields"))) s;
+  /* In an ENUMERAL_TYPE, the min and max values.  */
+  tree enum_min;
+  tree enum_max;
+  /* In a RECORD_TYPE, information specific to Objective-C, such
+     as a list of adopted protocols or a pointer to a corresponding
+     @interface.  See objc/objc-act.h for details.  */
+  tree objc_info;
+};
+
+/* Record whether a type or decl was written with nonconstant size.
+   Note that TYPE_SIZE may have simplified to a constant.  */
+#define C_TYPE_VARIABLE_SIZE(TYPE) TYPE_LANG_FLAG_1 (TYPE)
+#define C_DECL_VARIABLE_SIZE(TYPE) DECL_LANG_FLAG_0 (TYPE)
+
+/* Record whether a typedef for type `int' was actually `signed int'.  */
+#define C_TYPEDEF_EXPLICITLY_SIGNED(EXP) DECL_LANG_FLAG_1 (EXP)
+
+/* For a FUNCTION_DECL, nonzero if it was defined without an explicit
+   return type.  */
+#define C_FUNCTION_IMPLICIT_INT(EXP) DECL_LANG_FLAG_1 (EXP)
+
+/* For a FUNCTION_DECL, nonzero if it was an implicit declaration.  */
+#define C_DECL_IMPLICIT(EXP) DECL_LANG_FLAG_2 (EXP)
+
+/* For FUNCTION_DECLs, evaluates true if the decl is built-in but has
+   been declared.  */
+#define C_DECL_DECLARED_BUILTIN(EXP)		\
+  DECL_LANG_FLAG_3 (FUNCTION_DECL_CHECK (EXP))
+
+/* For FUNCTION_DECLs, evaluates true if the decl is built-in, has a
+   built-in prototype and does not have a non-built-in prototype.  */
+#define C_DECL_BUILTIN_PROTOTYPE(EXP)		\
+  DECL_LANG_FLAG_6 (FUNCTION_DECL_CHECK (EXP))
+
+/* Record whether a decl was declared register.  This is strictly a
+   front-end flag, whereas DECL_REGISTER is used for code generation;
+   they may differ for structures with volatile fields.  */
+#define C_DECL_REGISTER(EXP) DECL_LANG_FLAG_4 (EXP)
+
+/* Record whether a decl was used in an expression anywhere except an
+   unevaluated operand of sizeof / typeof / alignof.  This is only
+   used for functions declared static but not defined, though outside
+   sizeof and typeof it is set for other function decls as well.  */
+#define C_DECL_USED(EXP) DECL_LANG_FLAG_5 (FUNCTION_DECL_CHECK (EXP))
+
+/* Record whether a label was defined in a statement expression which
+   has finished and so can no longer be jumped to.  */
+#define C_DECL_UNJUMPABLE_STMT_EXPR(EXP)	\
+  DECL_LANG_FLAG_6 (LABEL_DECL_CHECK (EXP))
+
+/* Record whether a label was the subject of a goto from outside the
+   current level of statement expression nesting and so cannot be
+   defined right now.  */
+#define C_DECL_UNDEFINABLE_STMT_EXPR(EXP)	\
+  DECL_LANG_FLAG_7 (LABEL_DECL_CHECK (EXP))
+
+/* Record whether a label was defined in the scope of an identifier
+   with variably modified type which has finished and so can no longer
+   be jumped to.  */
+#define C_DECL_UNJUMPABLE_VM(EXP)	\
+  DECL_LANG_FLAG_3 (LABEL_DECL_CHECK (EXP))
+
+/* Record whether a label was the subject of a goto from outside the
+   current level of scopes of identifiers with variably modified type
+   and so cannot be defined right now.  */
+#define C_DECL_UNDEFINABLE_VM(EXP)	\
+  DECL_LANG_FLAG_5 (LABEL_DECL_CHECK (EXP))
+
+/* Record whether a variable has been declared threadprivate by
+   #pragma omp threadprivate.  */
+#define C_DECL_THREADPRIVATE_P(DECL) DECL_LANG_FLAG_3 (VAR_DECL_CHECK (DECL))
+
+/* Nonzero for a decl which either doesn't exist or isn't a prototype.
+   N.B. Could be simplified if all built-in decls had complete prototypes
+   (but this is presently difficult because some of them need FILE*).  */
+#define C_DECL_ISNT_PROTOTYPE(EXP)			\
+       (EXP == 0					\
+	|| (TYPE_ARG_TYPES (TREE_TYPE (EXP)) == 0	\
+	    && !DECL_BUILT_IN (EXP)))
+
+/* For FUNCTION_TYPE, a hidden list of types of arguments.  The same as
+   TYPE_ARG_TYPES for functions with prototypes, but created for functions
+   without prototypes.  */
+#define TYPE_ACTUAL_ARG_TYPES(NODE) TYPE_LANG_SLOT_1 (NODE)
+
+/* Record parser information about an expression that is irrelevant
+   for code generation alongside a tree representing its value.  */
+struct c_expr
+{
+  /* The value of the expression.  */
+  tree value;
+  /* Record the original unary/binary operator of an expression, which may
+     have been changed by fold, STRING_CST for unparenthesized string
+     constants, or ERROR_MARK for other expressions (including
+     parenthesized expressions).  */
+  enum tree_code original_code;
+};
+
+/* A kind of type specifier.  Note that this information is currently
+   only used to distinguish tag definitions, tag references and typeof
+   uses.  */
+enum c_typespec_kind {
+  /* A reserved keyword type specifier.  */
+  ctsk_resword,
+  /* A reference to a tag, previously declared, such as "struct foo".
+     This includes where the previous declaration was as a different
+     kind of tag, in which case this is only valid if shadowing that
+     tag in an inner scope.  */
+  ctsk_tagref,
+  /* A reference to a tag, not previously declared in a visible
+     scope.  */
+  ctsk_tagfirstref,
+  /* A definition of a tag such as "struct foo { int a; }".  */
+  ctsk_tagdef,
+  /* A typedef name.  */
+  ctsk_typedef,
+  /* An ObjC-specific kind of type specifier.  */
+  ctsk_objc,
+  /* A typeof specifier.  */
+  ctsk_typeof
+};
+
+/* A type specifier: this structure is created in the parser and
+   passed to declspecs_add_type only.  */
+struct c_typespec {
+  /* What kind of type specifier this is.  */
+  enum c_typespec_kind kind;
+  /* The specifier itself.  */
+  tree spec;
+};
+
+/* A storage class specifier.  */
+enum c_storage_class {
+  csc_none,
+  csc_auto,
+  csc_extern,
+  csc_register,
+  csc_static,
+  csc_typedef
+};
+
+/* A type specifier keyword "void", "_Bool", "char", "int", "float",
+   "double", "_Decimal32", "_Decimal64", "_Decimal128", "_Fract", "_Accum",
+   or none of these.  */
+enum c_typespec_keyword {
+  cts_none,
+  cts_void,
+  cts_bool,
+  cts_char,
+  cts_int,
+  cts_float,
+  cts_double,
+  cts_dfloat32,
+  cts_dfloat64,
+  cts_dfloat128,
+  cts_fract,
+  cts_accum
+};
+
+/* A sequence of declaration specifiers in C.  */
+struct c_declspecs {
+  /* The type specified, if a single type specifier such as a struct,
+     union or enum specifier, typedef name or typeof specifies the
+     whole type, or NULL_TREE if none or a keyword such as "void" or
+     "char" is used.  Does not include qualifiers.  */
+  tree type;
+  /* The attributes from a typedef decl.  */
+  tree decl_attr;
+  /* When parsing, the attributes.  Outside the parser, this will be
+     NULL; attributes (possibly from multiple lists) will be passed
+     separately.  */
+  tree attrs;
+  /* Any type specifier keyword used such as "int", not reflecting
+     modifiers such as "short", or cts_none if none.  */
+  enum c_typespec_keyword typespec_word;
+  /* The storage class specifier, or csc_none if none.  */
+  enum c_storage_class storage_class;
+  /* Whether any declaration specifiers have been seen at all.  */
+  BOOL_BITFIELD declspecs_seen_p : 1;
+  /* Whether a type specifier has been seen.  */
+  BOOL_BITFIELD type_seen_p : 1;
+  /* Whether something other than a storage class specifier or
+     attribute has been seen.  This is used to warn for the
+     obsolescent usage of storage class specifiers other than at the
+     start of the list.  (Doing this properly would require function
+     specifiers to be handled separately from storage class
+     specifiers.)  */
+  BOOL_BITFIELD non_sc_seen_p : 1;
+  /* Whether the type is specified by a typedef or typeof name.  */
+  BOOL_BITFIELD typedef_p : 1;
+  /* Whether a struct, union or enum type either had its content
+     defined by a type specifier in the list or was the first visible
+     declaration of its tag.  */
+  BOOL_BITFIELD tag_defined_p : 1;
+  /* Whether the type is explicitly "signed" or specified by a typedef
+     whose type is explicitly "signed".  */
+  BOOL_BITFIELD explicit_signed_p : 1;
+  /* Whether the specifiers include a deprecated typedef.  */
+  BOOL_BITFIELD deprecated_p : 1;
+  /* Whether the type defaulted to "int" because there were no type
+     specifiers.  */
+  BOOL_BITFIELD default_int_p;
+  /* Whether "long" was specified.  */
+  BOOL_BITFIELD long_p : 1;
+  /* Whether "long" was specified more than once.  */
+  BOOL_BITFIELD long_long_p : 1;
+  /* Whether "short" was specified.  */
+  BOOL_BITFIELD short_p : 1;
+  /* Whether "signed" was specified.  */
+  BOOL_BITFIELD signed_p : 1;
+  /* Whether "unsigned" was specified.  */
+  BOOL_BITFIELD unsigned_p : 1;
+  /* Whether "complex" was specified.  */
+  BOOL_BITFIELD complex_p : 1;
+  /* Whether "inline" was specified.  */
+  BOOL_BITFIELD inline_p : 1;
+  /* Whether "__thread" was specified.  */
+  BOOL_BITFIELD thread_p : 1;
+  /* Whether "const" was specified.  */
+  BOOL_BITFIELD const_p : 1;
+  /* Whether "volatile" was specified.  */
+  BOOL_BITFIELD volatile_p : 1;
+  /* Whether "restrict" was specified.  */
+  BOOL_BITFIELD restrict_p : 1;
+  /* Whether "_Sat" was specified.  */
+  BOOL_BITFIELD saturating_p : 1;
+};
+
+/* The various kinds of declarators in C.  */
+enum c_declarator_kind {
+  /* An identifier.  */
+  cdk_id,
+  /* A function.  */
+  cdk_function,
+  /* An array.  */
+  cdk_array,
+  /* A pointer.  */
+  cdk_pointer,
+  /* Parenthesized declarator with nested attributes.  */
+  cdk_attrs
+};
+
+/* Information about the parameters in a function declarator.  */
+struct c_arg_info {
+  /* A list of parameter decls.  */
+  tree parms;
+  /* A list of structure, union and enum tags defined.  */
+  tree tags;
+  /* A list of argument types to go in the FUNCTION_TYPE.  */
+  tree types;
+  /* A list of non-parameter decls (notably enumeration constants)
+     defined with the parameters.  */
+  tree others;
+  /* A list of VLA sizes from the parameters.  In a function
+     definition, these are used to ensure that side-effects in sizes
+     of arrays converted to pointers (such as a parameter int i[n++])
+     take place; otherwise, they are ignored.  */
+  tree pending_sizes;
+  /* True when these arguments had [*].  */
+  BOOL_BITFIELD had_vla_unspec : 1;
+};
+
+/* A declarator.  */
+struct c_declarator {
+  /* The kind of declarator.  */
+  enum c_declarator_kind kind;
+  /* Except for cdk_id, the contained declarator.  For cdk_id, NULL.  */
+  struct c_declarator *declarator;
+  location_t id_loc; /* Currently only set for cdk_id. */
+  union {
+    /* For identifiers, an IDENTIFIER_NODE or NULL_TREE if an abstract
+       declarator.  */
+    tree id;
+    /* For functions.  */
+    struct c_arg_info *arg_info;
+    /* For arrays.  */
+    struct {
+      /* The array dimension, or NULL for [] and [*].  */
+      tree dimen;
+      /* The qualifiers inside [].  */
+      int quals;
+      /* The attributes (currently ignored) inside [].  */
+      tree attrs;
+      /* Whether [static] was used.  */
+      BOOL_BITFIELD static_p : 1;
+      /* Whether [*] was used.  */
+      BOOL_BITFIELD vla_unspec_p : 1;
+    } array;
+    /* For pointers, the qualifiers on the pointer type.  */
+    int pointer_quals;
+    /* For attributes.  */
+    tree attrs;
+  } u;
+};
+
+/* A type name.  */
+struct c_type_name {
+  /* The declaration specifiers.  */
+  struct c_declspecs *specs;
+  /* The declarator.  */
+  struct c_declarator *declarator;
+};
+
+/* A parameter.  */
+struct c_parm {
+  /* The declaration specifiers, minus any prefix attributes.  */
+  struct c_declspecs *specs;
+  /* The attributes.  */
+  tree attrs;
+  /* The declarator.  */
+  struct c_declarator *declarator;
+};
+
+/* Save and restore the variables in this file and elsewhere
+   that keep track of the progress of compilation of the current function.
+   Used for nested functions.  */
+
+struct language_function GTY(())
+{
+  struct c_language_function base;
+  tree x_break_label;
+  tree x_cont_label;
+  struct c_switch * GTY((skip)) x_switch_stack;
+  struct c_arg_info * GTY((skip)) arg_info;
+  int returns_value;
+  int returns_null;
+  int returns_abnormally;
+  int warn_about_return_type;
+};
+
+/* Save lists of labels used or defined in particular contexts.
+   Allocated on the parser obstack.  */
+
+struct c_label_list
+{
+  /* The label at the head of the list.  */
+  tree label;
+  /* The rest of the list.  */
+  struct c_label_list *next;
+};
+
+/* Statement expression context.  */
+
+struct c_label_context_se
+{
+  /* The labels defined at this level of nesting.  */
+  struct c_label_list *labels_def;
+  /* The labels used at this level of nesting.  */
+  struct c_label_list *labels_used;
+  /* The next outermost context.  */
+  struct c_label_context_se *next;
+};
+
+/* Context of variably modified declarations.  */
+
+struct c_label_context_vm
+{
+  /* The labels defined at this level of nesting.  */
+  struct c_label_list *labels_def;
+  /* The labels used at this level of nesting.  */
+  struct c_label_list *labels_used;
+  /* The scope of this context.  Multiple contexts may be at the same
+     numbered scope, since each variably modified declaration starts a
+     new context.  */
+  unsigned scope;
+  /* The next outermost context.  */
+  struct c_label_context_vm *next;
+};
+
+/* Used when parsing an enum.  Initialized by start_enum.  */
+struct c_enum_contents
+{
+  /* While defining an enum type, this is 1 plus the last enumerator
+     constant value.  */
+  tree enum_next_value;
+
+  /* Nonzero means that there was overflow computing enum_next_value.  */
+  int enum_overflow;
+};
+
+
+/* in c-parser.c */
+extern void c_parse_init (void);
+
+/* in c-aux-info.c */
+extern void gen_aux_info_record (tree, int, int, int);
+
+/* in c-decl.c */
+extern struct obstack parser_obstack;
+extern tree c_break_label;
+extern tree c_cont_label;
+
+extern int global_bindings_p (void);
+extern void push_scope (void);
+extern tree pop_scope (void);
+
+extern void c_init_decl_processing (void);
+extern void c_dup_lang_specific_decl (tree);
+extern void c_print_identifier (FILE *, tree, int);
+extern int quals_from_declspecs (const struct c_declspecs *);
+extern struct c_declarator *build_array_declarator (tree, struct c_declspecs *,
+						    bool, bool);
+extern tree build_enumerator (struct c_enum_contents *, tree, tree, location_t);
+extern tree check_for_loop_decls (void);
+extern void mark_forward_parm_decls (void);
+extern void declare_parm_level (void);
+extern void undeclared_variable (tree, location_t);
+extern tree declare_label (tree);
+extern tree define_label (location_t, tree);
+extern void c_maybe_initialize_eh (void);
+extern void finish_decl (tree, tree, tree);
+extern tree finish_enum (tree, tree, tree);
+extern void finish_function (void);
+extern tree finish_struct (tree, tree, tree);
+extern struct c_arg_info *get_parm_info (bool);
+extern tree grokfield (location_t, struct c_declarator *,
+		       struct c_declspecs *, tree, tree *);
+extern tree groktypename (struct c_type_name *);
+extern tree grokparm (const struct c_parm *);
+extern tree implicitly_declare (tree);
+extern void keep_next_level (void);
+extern void pending_xref_error (void);
+extern void c_push_function_context (void);
+extern void c_pop_function_context (void);
+extern void push_parm_decl (const struct c_parm *);
+extern struct c_declarator *set_array_declarator_inner (struct c_declarator *,
+							struct c_declarator *);
+extern tree c_builtin_function (tree);
+extern tree c_builtin_function_ext_scope (tree);
+extern void shadow_tag (const struct c_declspecs *);
+extern void shadow_tag_warned (const struct c_declspecs *, int);
+extern tree start_enum (struct c_enum_contents *, tree);
+extern int  start_function (struct c_declspecs *, struct c_declarator *, tree);
+extern tree start_decl (struct c_declarator *, struct c_declspecs *, bool,
+			tree);
+extern tree start_struct (enum tree_code, tree);
+extern void store_parm_decls (void);
+extern void store_parm_decls_from (struct c_arg_info *);
+extern tree xref_tag (enum tree_code, tree);
+extern struct c_typespec parser_xref_tag (enum tree_code, tree);
+extern int c_expand_decl (tree);
+extern struct c_parm *build_c_parm (struct c_declspecs *, tree,
+				    struct c_declarator *);
+extern struct c_declarator *build_attrs_declarator (tree,
+						    struct c_declarator *);
+extern struct c_declarator *build_function_declarator (struct c_arg_info *,
+						       struct c_declarator *);
+extern struct c_declarator *build_id_declarator (tree);
+extern struct c_declarator *make_pointer_declarator (struct c_declspecs *,
+						     struct c_declarator *);
+extern struct c_declspecs *build_null_declspecs (void);
+extern struct c_declspecs *declspecs_add_qual (struct c_declspecs *, tree);
+extern struct c_declspecs *declspecs_add_type (struct c_declspecs *,
+					       struct c_typespec);
+extern struct c_declspecs *declspecs_add_scspec (struct c_declspecs *, tree);
+extern struct c_declspecs *declspecs_add_attrs (struct c_declspecs *, tree);
+extern struct c_declspecs *finish_declspecs (struct c_declspecs *);
+
+/* in c-objc-common.c */
+extern bool c_objc_common_init (void);
+extern bool c_missing_noreturn_ok_p (tree);
+extern bool c_warn_unused_global_decl (const_tree);
+extern void c_initialize_diagnostics (diagnostic_context *);
+extern bool c_vla_unspec_p (tree x, tree fn);
+
+#define c_build_type_variant(TYPE, CONST_P, VOLATILE_P)		  \
+  c_build_qualified_type ((TYPE),				  \
+			  ((CONST_P) ? TYPE_QUAL_CONST : 0) |	  \
+			  ((VOLATILE_P) ? TYPE_QUAL_VOLATILE : 0))
+
+/* in c-typeck.c */
+extern int in_alignof;
+extern int in_sizeof;
+extern int in_typeof;
+
+extern struct c_switch *c_switch_stack;
+extern struct c_label_context_se *label_context_stack_se;
+extern struct c_label_context_vm *label_context_stack_vm;
+
+extern tree c_objc_common_truthvalue_conversion (location_t, tree);
+extern tree require_complete_type (tree);
+extern int same_translation_unit_p (const_tree, const_tree);
+extern int comptypes (tree, tree);
+extern bool c_vla_type_p (const_tree);
+extern bool c_mark_addressable (tree);
+extern void c_incomplete_type_error (const_tree, const_tree);
+extern tree c_type_promotes_to (tree);
+extern struct c_expr default_function_array_conversion (struct c_expr);
+extern tree composite_type (tree, tree);
+extern tree build_component_ref (tree, tree);
+extern tree build_array_ref (tree, tree, location_t);
+extern tree build_external_ref (tree, int, location_t);
+extern void pop_maybe_used (bool);
+extern struct c_expr c_expr_sizeof_expr (struct c_expr);
+extern struct c_expr c_expr_sizeof_type (struct c_type_name *);
+extern struct c_expr parser_build_unary_op (enum tree_code, struct c_expr,
+    					    location_t);
+extern struct c_expr parser_build_binary_op (location_t, 
+    					     enum tree_code, struct c_expr,
+					     struct c_expr);
+extern tree build_conditional_expr (tree, tree, tree);
+extern tree build_compound_expr (tree, tree);
+extern tree c_cast_expr (struct c_type_name *, tree);
+extern tree build_c_cast (tree, tree);
+extern void store_init_value (tree, tree);
+extern void error_init (const char *);
+extern void pedwarn_init (location_t, int opt, const char *);
+extern void maybe_warn_string_init (tree, struct c_expr);
+extern void start_init (tree, tree, int);
+extern void finish_init (void);
+extern void really_start_incremental_init (tree);
+extern void push_init_level (int);
+extern struct c_expr pop_init_level (int);
+extern void set_init_index (tree, tree);
+extern void set_init_label (tree);
+extern void process_init_element (struct c_expr, bool);
+extern tree build_compound_literal (tree, tree);
+extern tree c_start_case (tree);
+extern void c_finish_case (tree);
+extern tree build_asm_expr (tree, tree, tree, tree, bool);
+extern tree build_asm_stmt (tree, tree);
+extern int c_types_compatible_p (tree, tree);
+extern tree c_begin_compound_stmt (bool);
+extern tree c_end_compound_stmt (tree, bool);
+extern void c_finish_if_stmt (location_t, tree, tree, tree, bool);
+extern void c_finish_loop (location_t, tree, tree, tree, tree, tree, bool);
+extern tree c_begin_stmt_expr (void);
+extern tree c_finish_stmt_expr (tree);
+extern tree c_process_expr_stmt (tree);
+extern tree c_finish_expr_stmt (tree);
+extern tree c_finish_return (tree);
+extern tree c_finish_bc_stmt (tree *, bool);
+extern tree c_finish_goto_label (tree);
+extern tree c_finish_goto_ptr (tree);
+extern void c_begin_vm_scope (unsigned int);
+extern void c_end_vm_scope (unsigned int);
+extern tree c_expr_to_decl (tree, bool *, bool *);
+extern tree c_begin_omp_parallel (void);
+extern tree c_finish_omp_parallel (tree, tree);
+extern tree c_begin_omp_task (void);
+extern tree c_finish_omp_task (tree, tree);
+extern tree c_finish_omp_clauses (tree);
+
+/* Set to 0 at beginning of a function definition, set to 1 if
+   a return statement that specifies a return value is seen.  */
+
+extern int current_function_returns_value;
+
+/* Set to 0 at beginning of a function definition, set to 1 if
+   a return statement with no argument is seen.  */
+
+extern int current_function_returns_null;
+
+/* Set to 0 at beginning of a function definition, set to 1 if
+   a call to a noreturn function is seen.  */
+
+extern int current_function_returns_abnormally;
+
+/* Nonzero means we are reading code that came from a system header file.  */
+
+extern int system_header_p;
+
+/* True means global_bindings_p should return false even if the scope stack
+   says we are in file scope.  */
+
+extern bool c_override_global_bindings_to_false;
+
+/* True means we've initialized exception handling.  */
+extern bool c_eh_initialized_p;
+
+/* In c-decl.c */
+extern void c_finish_incomplete_decl (tree);
+extern void c_write_global_declarations (void);
+
+/* In order for the format checking to accept the C frontend
+   diagnostic framework extensions, you must include this file before
+   toplev.h, not after.  */
+#if GCC_VERSION >= 4001
+#define ATTRIBUTE_GCC_CDIAG(m, n) __attribute__ ((__format__ (GCC_DIAG_STYLE, m ,n))) ATTRIBUTE_NONNULL(m)
+#else
+#define ATTRIBUTE_GCC_CDIAG(m, n) ATTRIBUTE_NONNULL(m)
+#endif
+
+extern void pedwarn_c90 (location_t, int opt, const char *, ...) ATTRIBUTE_GCC_CDIAG(3,4);
+extern void pedwarn_c99 (location_t, int opt, const char *, ...) ATTRIBUTE_GCC_CDIAG(3,4);
+
+#endif /* ! GCC_C_TREE_H */