/* 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, 2010
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
Free Software Foundation, Inc.
This file is part of GCC.
(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 \
+ || (!prototype_p (TREE_TYPE (EXP)) \
&& !DECL_BUILT_IN (EXP)))
/* For FUNCTION_TYPE, a hidden list of types of arguments. The same as
tree original_type;
};
+/* Type alias for struct c_expr. This allows to use the structure
+ inside the VEC types. */
+typedef struct c_expr c_expr_t;
+
+/* A varray of c_expr_t. */
+DEF_VEC_O (c_expr_t);
+DEF_VEC_ALLOC_O (c_expr_t, gc);
+DEF_VEC_ALLOC_O (c_expr_t, heap);
+
+/* Append a new c_expr_t element to V. */
+#define C_EXPR_APPEND(V, ELEM) \
+ do { \
+ c_expr_t *__elem_p = VEC_safe_push (c_expr_t, gc, V, NULL); \
+ *__elem_p = (ELEM); \
+ } while (0)
+
/* 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 {
+ /* No typespec. This appears only in struct c_declspec. */
+ ctsk_none,
/* A reserved keyword type specifier. */
ctsk_resword,
/* A reference to a tag, previously declared, such as "struct foo".
cts_accum
};
-/* A sequence of declaration specifiers in C. */
+/* This enum lists all the possible declarator specifiers, storage
+ class or attribute that a user can write. There is at least one
+ enumerator per possible declarator specifier in the struct
+ c_declspecs below.
+
+ It is used to index the array of declspec locations in struct
+ c_declspecs. */
+enum c_declspec_word {
+ cdw_typespec /* A catch-all for a typespec. */,
+ cdw_storage_class /* A catch-all for a storage class */,
+ cdw_attributes,
+ cdw_typedef,
+ cdw_explicit_signed,
+ cdw_deprecated,
+ cdw_default_int,
+ cdw_long,
+ cdw_long_long,
+ cdw_short,
+ cdw_signed,
+ cdw_unsigned,
+ cdw_complex,
+ cdw_inline,
+ cdw_noreturn,
+ cdw_thread,
+ cdw_const,
+ cdw_volatile,
+ cdw_restrict,
+ cdw_saturating,
+ cdw_alignas,
+ cdw_address_space,
+ cdw_number_of_elements /* This one must always be the last
+ enumerator. */
+};
+
+/* A sequence of declaration specifiers in C. When a new declaration
+ specifier is added, please update the enum c_declspec_word above
+ accordingly. */
struct c_declspecs {
+ source_location locations[cdw_number_of_elements];
/* 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
NULL; attributes (possibly from multiple lists) will be passed
separately. */
tree attrs;
+ /* The base-2 log of the greatest alignment required by an _Alignas
+ specifier, in bytes, or -1 if no such specifiers with nonzero
+ alignment. */
+ int align_log;
/* The storage class specifier, or csc_none if none. */
enum c_storage_class storage_class;
/* Any type specifier keyword used such as "int", not reflecting
modifiers such as "short", or cts_none if none. */
ENUM_BITFIELD (c_typespec_keyword) typespec_word : 8;
+ /* The kind of type specifier if one has been seen, ctsk_none
+ otherwise. */
+ ENUM_BITFIELD (c_typespec_kind) typespec_kind : 3;
/* Whether any expressions in typeof specifiers may appear in
constant expressions. */
BOOL_BITFIELD expr_const_operands : 1;
/* 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
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;
BOOL_BITFIELD complex_p : 1;
/* Whether "inline" was specified. */
BOOL_BITFIELD inline_p : 1;
+ /* Whether "_Noreturn" was speciied. */
+ BOOL_BITFIELD noreturn_p : 1;
/* Whether "__thread" was specified. */
BOOL_BITFIELD thread_p : 1;
/* Whether "const" was specified. */
BOOL_BITFIELD restrict_p : 1;
/* Whether "_Sat" was specified. */
BOOL_BITFIELD saturating_p : 1;
+ /* Whether any alignment specifier (even with zero alignment) was
+ specified. */
+ BOOL_BITFIELD alignas_p : 1;
/* The address space that the declaration belongs to. */
addr_space_t address_space;
};
cdk_attrs
};
-typedef struct GTY(()) c_arg_tag_d {
+typedef struct c_arg_tag_d {
/* The argument name. */
tree id;
/* The type of the argument. */
/* A list of non-parameter decls (notably enumeration constants)
defined with the parameters. */
tree others;
- /* A VEC 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. */
- VEC(tree,gc) *pending_sizes;
+ /* A compound expression of VLA sizes from the parameters, or NULL.
+ 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;
};
extern tree c_break_label;
extern tree c_cont_label;
-extern int global_bindings_p (void);
+extern bool global_bindings_p (void);
extern void push_scope (void);
extern tree pop_scope (void);
extern void c_bindings_start_stmt_expr (struct c_spot_bindings *);
bool, bool);
extern tree build_enumerator (location_t, location_t, struct c_enum_contents *,
tree, tree);
-extern tree check_for_loop_decls (location_t);
+extern tree check_for_loop_decls (location_t, bool);
extern void mark_forward_parm_decls (void);
extern void declare_parm_level (void);
extern void undeclared_variable (location_t, tree);
extern tree finish_struct (location_t, tree, tree, tree,
struct c_struct_parse_info *);
extern struct c_arg_info *build_arg_info (void);
-extern struct c_arg_info *get_parm_info (bool);
+extern struct c_arg_info *get_parm_info (bool, tree);
extern tree grokfield (location_t, struct c_declarator *,
struct c_declspecs *, tree, tree *);
extern tree groktypename (struct c_type_name *, tree *, bool *);
-extern tree grokparm (const struct c_parm *);
+extern tree grokparm (const struct c_parm *, tree *);
extern tree implicitly_declare (location_t, 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 void push_parm_decl (const struct c_parm *, tree *);
extern struct c_declarator *set_array_declarator_inner (struct c_declarator *,
struct c_declarator *);
extern tree c_builtin_function (tree);
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 (location_t, 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,
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_qual (source_location,
+ struct c_declspecs *, tree);
extern struct c_declspecs *declspecs_add_type (location_t,
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 *declspecs_add_addrspace (struct c_declspecs *,
+extern struct c_declspecs *declspecs_add_scspec (source_location,
+ struct c_declspecs *, tree);
+extern struct c_declspecs *declspecs_add_attrs (source_location,
+ struct c_declspecs *, tree);
+extern struct c_declspecs *declspecs_add_addrspace (source_location,
+ struct c_declspecs *,
addr_space_t);
+extern struct c_declspecs *declspecs_add_alignas (source_location,
+ struct c_declspecs *, tree);
extern struct c_declspecs *finish_declspecs (struct c_declspecs *);
/* in c-objc-common.c */
extern bool c_vla_unspec_p (tree x, tree fn);
/* in c-typeck.c */
-extern bool in_late_binary_op;
extern int in_alignof;
extern int in_sizeof;
extern int in_typeof;
extern tree c_finish_omp_task (location_t, tree, tree);
extern tree c_finish_omp_clauses (tree);
extern tree c_build_va_arg (location_t, tree, tree);
+extern tree c_finish_transaction (location_t, tree, int);
+extern tree c_build_vec_perm_expr (location_t, tree, tree, 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_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. */
+/* Mode used to build pointers (VOIDmode means ptr_mode). */
-extern bool c_override_global_bindings_to_false;
+extern enum machine_mode c_default_pointer_mode;
/* In c-decl.c */
extern void c_finish_incomplete_decl (tree);
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