/* Parser for C and Objective-C.
Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
- Free Software Foundation, Inc.
+ 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011,
+ 2012 Free Software Foundation, Inc.
Parser actions based on the old Bison parser; structure somewhat
influenced by and fragments based on the C++ parser.
undesirable to bind an identifier to an Objective-C class, even
if a class with that name exists. */
BOOL_BITFIELD objc_need_raw_identifier : 1;
+ /* Nonzero if we're processing a __transaction statement. The value
+ is 1 | TM_STMT_ATTR_*. */
+ unsigned int in_transaction : 4;
/* True if we are in a context where the Objective-C "Property attribute"
keywords are valid. */
BOOL_BITFIELD objc_property_attr_context : 1;
case RID_REGISTER:
case RID_TYPEDEF:
case RID_INLINE:
+ case RID_NORETURN:
case RID_AUTO:
case RID_THREAD:
case RID_UNSIGNED:
case RID_FRACT:
case RID_ACCUM:
case RID_SAT:
+ case RID_ALIGNAS:
return true;
default:
return false;
static struct c_typespec c_parser_struct_or_union_specifier (c_parser *);
static tree c_parser_struct_declaration (c_parser *);
static struct c_typespec c_parser_typeof_specifier (c_parser *);
+static tree c_parser_alignas_specifier (c_parser *);
static struct c_declarator *c_parser_declarator (c_parser *, bool, c_dtr_syn,
bool *);
static struct c_declarator *c_parser_direct_declarator (c_parser *, bool,
static struct c_expr c_parser_postfix_expression_after_primary (c_parser *,
location_t loc,
struct c_expr);
+static tree c_parser_transaction (c_parser *, enum rid);
+static struct c_expr c_parser_transaction_expression (c_parser *, enum rid);
+static tree c_parser_transaction_cancel (c_parser *);
static struct c_expr c_parser_expression (c_parser *);
static struct c_expr c_parser_expression_conv (c_parser *);
static VEC(tree,gc) *c_parser_expr_list (c_parser *, bool, bool,
c_parser_skip_until_found (parser, CPP_SEMICOLON, "expected %<;%>");
}
-/* Parse a static assertion (C1X N1425 6.7.10).
+/* Parse a static assertion (C11 6.7.10).
static_assert-declaration:
static_assert-declaration-no-semi ;
c_parser_skip_to_end_of_block_or_statement (parser);
}
-/* Parse a static assertion (C1X N1425 6.7.10), without the trailing
+/* Parse a static assertion (C11 6.7.10), without the trailing
semicolon.
static_assert-declaration-no-semi:
gcc_assert (c_parser_next_token_is_keyword (parser, RID_STATIC_ASSERT));
assert_loc = c_parser_peek_token (parser)->location;
- if (!flag_isoc1x)
+ if (!flag_isoc11)
{
if (flag_isoc99)
pedwarn (assert_loc, OPT_pedantic,
type-specifier declaration-specifiers[opt]
type-qualifier declaration-specifiers[opt]
function-specifier declaration-specifiers[opt]
+ alignment-specifier declaration-specifiers[opt]
Function specifiers (inline) are from C99, and are currently
- handled as storage class specifiers, as is __thread.
+ handled as storage class specifiers, as is __thread. Alignment
+ specifiers are from C11.
C90 6.5.1, C99 6.7.1:
storage-class-specifier:
C99 6.7.4:
function-specifier:
inline
+ _Noreturn
+
+ (_Noreturn is new in C11.)
C90 6.5.2, C99 6.7.2:
type-specifier:
{
struct c_typespec t;
tree attrs;
+ tree align;
location_t loc = c_parser_peek_token (parser)->location;
/* If we cannot accept a type, exit if the next token must start
case RID_REGISTER:
case RID_TYPEDEF:
case RID_INLINE:
+ case RID_NORETURN:
case RID_AUTO:
case RID_THREAD:
if (!scspec_ok)
goto out;
attrs_ok = true;
- /* TODO: Distinguish between function specifiers (inline)
+ /* TODO: Distinguish between function specifiers (inline, noreturn)
and storage class specifiers, either here or in
declspecs_add_scspec. */
declspecs_add_scspec (specs, c_parser_peek_token (parser)->value);
attrs = c_parser_attributes (parser);
declspecs_add_attrs (specs, attrs);
break;
+ case RID_ALIGNAS:
+ align = c_parser_alignas_specifier (parser);
+ declspecs_add_alignas (specs, align);
+ break;
default:
goto out;
}
return ret;
}
+/* Parse an alignment-specifier.
+
+ C11 6.7.5:
+
+ alignment-specifier:
+ _Alignas ( type-name )
+ _Alignas ( constant-expression )
+*/
+
+static tree
+c_parser_alignas_specifier (c_parser * parser)
+{
+ tree ret = error_mark_node;
+ location_t loc = c_parser_peek_token (parser)->location;
+ gcc_assert (c_parser_next_token_is_keyword (parser, RID_ALIGNAS));
+ c_parser_consume_token (parser);
+ if (!flag_isoc11)
+ {
+ if (flag_isoc99)
+ pedwarn (loc, OPT_pedantic,
+ "ISO C99 does not support %<_Alignas%>");
+ else
+ pedwarn (loc, OPT_pedantic,
+ "ISO C90 does not support %<_Alignas%>");
+ }
+ if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
+ return ret;
+ if (c_parser_next_tokens_start_typename (parser, cla_prefer_id))
+ {
+ struct c_type_name *type = c_parser_type_name (parser);
+ if (type != NULL)
+ ret = c_alignof (loc, groktypename (type, NULL, NULL));
+ }
+ else
+ ret = c_parser_expr_no_commas (parser, NULL).value;
+ c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
+ return ret;
+}
+
/* Parse a declarator, possibly an abstract declarator (C90 6.5.4,
6.5.5, C99 6.7.5, 6.7.6). If TYPE_SEEN_P then a typedef name may
be redeclared; otherwise it may not. KIND indicates which kind of
if (c_parser_next_token_is (parser, CPP_ELLIPSIS))
{
struct c_arg_info *ret = build_arg_info ();
- /* Suppress -Wold-style-definition for this case. */
- ret->types = error_mark_node;
- error_at (c_parser_peek_token (parser)->location,
- "ISO C requires a named argument before %<...%>");
+
+ if (flag_allow_parameterless_variadic_functions)
+ {
+ /* F (...) is allowed. */
+ ret->types = NULL_TREE;
+ }
+ else
+ {
+ /* Suppress -Wold-style-definition for this case. */
+ ret->types = error_mark_node;
+ error_at (c_parser_peek_token (parser)->location,
+ "ISO C requires a named argument before %<...%>");
+ }
c_parser_consume_token (parser);
if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
{
return str;
}
+static tree
+c_parser_attribute_any_word (c_parser *parser)
+{
+ tree attr_name = NULL_TREE;
+
+ if (c_parser_next_token_is (parser, CPP_KEYWORD))
+ {
+ /* ??? See comment above about what keywords are accepted here. */
+ bool ok;
+ switch (c_parser_peek_token (parser)->keyword)
+ {
+ case RID_STATIC:
+ case RID_UNSIGNED:
+ case RID_LONG:
+ case RID_INT128:
+ case RID_CONST:
+ case RID_EXTERN:
+ case RID_REGISTER:
+ case RID_TYPEDEF:
+ case RID_SHORT:
+ case RID_INLINE:
+ case RID_NORETURN:
+ case RID_VOLATILE:
+ case RID_SIGNED:
+ case RID_AUTO:
+ case RID_RESTRICT:
+ case RID_COMPLEX:
+ case RID_THREAD:
+ case RID_INT:
+ case RID_CHAR:
+ case RID_FLOAT:
+ case RID_DOUBLE:
+ case RID_VOID:
+ case RID_DFLOAT32:
+ case RID_DFLOAT64:
+ case RID_DFLOAT128:
+ case RID_BOOL:
+ case RID_FRACT:
+ case RID_ACCUM:
+ case RID_SAT:
+ case RID_TRANSACTION_ATOMIC:
+ case RID_TRANSACTION_CANCEL:
+ ok = true;
+ break;
+ default:
+ ok = false;
+ break;
+ }
+ if (!ok)
+ return NULL_TREE;
+
+ /* Accept __attribute__((__const)) as __attribute__((const)) etc. */
+ attr_name = ridpointers[(int) c_parser_peek_token (parser)->keyword];
+ }
+ else if (c_parser_next_token_is (parser, CPP_NAME))
+ attr_name = c_parser_peek_token (parser)->value;
+
+ return attr_name;
+}
+
/* Parse (possibly empty) attributes. This is a GNU extension.
attributes:
c_parser_consume_token (parser);
continue;
}
- if (c_parser_next_token_is (parser, CPP_KEYWORD))
- {
- /* ??? See comment above about what keywords are
- accepted here. */
- bool ok;
- switch (c_parser_peek_token (parser)->keyword)
- {
- case RID_STATIC:
- case RID_UNSIGNED:
- case RID_LONG:
- case RID_INT128:
- case RID_CONST:
- case RID_EXTERN:
- case RID_REGISTER:
- case RID_TYPEDEF:
- case RID_SHORT:
- case RID_INLINE:
- case RID_VOLATILE:
- case RID_SIGNED:
- case RID_AUTO:
- case RID_RESTRICT:
- case RID_COMPLEX:
- case RID_THREAD:
- case RID_INT:
- case RID_CHAR:
- case RID_FLOAT:
- case RID_DOUBLE:
- case RID_VOID:
- case RID_DFLOAT32:
- case RID_DFLOAT64:
- case RID_DFLOAT128:
- case RID_BOOL:
- case RID_FRACT:
- case RID_ACCUM:
- case RID_SAT:
- ok = true;
- break;
- default:
- ok = false;
- break;
- }
- if (!ok)
- break;
- /* Accept __attribute__((__const)) as __attribute__((const))
- etc. */
- attr_name
- = ridpointers[(int) c_parser_peek_token (parser)->keyword];
- }
- else
- attr_name = c_parser_peek_token (parser)->value;
+
+ attr_name = c_parser_attribute_any_word (parser);
+ if (attr_name == NULL)
+ break;
c_parser_consume_token (parser);
if (c_parser_next_token_is_not (parser, CPP_OPEN_PAREN))
{
atomic-directive expression-statement
ordered-construct:
- ordered-directive structured-block */
+ ordered-directive structured-block
+
+ Transactional Memory:
+
+ statement:
+ transaction-statement
+ transaction-cancel-statement
+*/
static void
c_parser_statement (c_parser *parser)
case RID_ASM:
stmt = c_parser_asm_statement (parser);
break;
+ case RID_TRANSACTION_ATOMIC:
+ case RID_TRANSACTION_RELAXED:
+ stmt = c_parser_transaction (parser,
+ c_parser_peek_token (parser)->keyword);
+ break;
+ case RID_TRANSACTION_CANCEL:
+ stmt = c_parser_transaction_cancel (parser);
+ goto expect_semicolon;
case RID_AT_THROW:
gcc_assert (c_dialect_objc ());
c_parser_consume_token (parser);
__alignof__ ( type-name )
&& identifier
+ (C11 permits _Alignof with type names only.)
+
unary-operator: one of
__extension__ __real__ __imag__
+ Transactional Memory:
+
+ unary-expression:
+ transaction-expression
+
In addition, the GNU syntax treats ++ and -- as unary operators, so
they may be applied to cast expressions with errors for non-lvalues
given later. */
op = c_parser_cast_expression (parser, NULL);
op = default_function_array_conversion (exp_loc, op);
return parser_build_unary_op (op_loc, IMAGPART_EXPR, op);
+ case RID_TRANSACTION_ATOMIC:
+ case RID_TRANSACTION_RELAXED:
+ return c_parser_transaction_expression (parser,
+ c_parser_peek_token (parser)->keyword);
default:
return c_parser_postfix_expression (parser);
}
{
struct c_expr expr;
location_t loc = c_parser_peek_token (parser)->location;
+ tree alignof_spelling = c_parser_peek_token (parser)->value;
gcc_assert (c_parser_next_token_is_keyword (parser, RID_ALIGNOF));
+ /* A diagnostic is not required for the use of this identifier in
+ the implementation namespace; only diagnose it for the C11
+ spelling because of existing code using the other spellings. */
+ if (!flag_isoc11
+ && strcmp (IDENTIFIER_POINTER (alignof_spelling), "_Alignof") == 0)
+ {
+ if (flag_isoc99)
+ pedwarn (loc, OPT_pedantic, "ISO C99 does not support %qE",
+ alignof_spelling);
+ else
+ pedwarn (loc, OPT_pedantic, "ISO C90 does not support %qE",
+ alignof_spelling);
+ }
c_parser_consume_token (parser);
c_inhibit_evaluation_warnings++;
in_alignof++;
mark_exp_read (expr.value);
c_inhibit_evaluation_warnings--;
in_alignof--;
+ pedwarn (loc, OPT_pedantic, "ISO C does not allow %<%E (expression)%>",
+ alignof_spelling);
ret.value = c_alignof_expr (loc, expr.value);
ret.original_code = ERROR_MARK;
ret.original_type = NULL;
}
}
+/* Helper function to read arguments of builtins which are interfaces
+ for the middle-end nodes like COMPLEX_EXPR, VEC_PERM_EXPR and
+ others. The name of the builtin is passed using BNAME parameter.
+ Function returns true if there were no errors while parsing and
+ stores the arguments in CEXPR_LIST. */
+static bool
+c_parser_get_builtin_args (c_parser *parser, const char *bname,
+ VEC(c_expr_t,gc) **ret_cexpr_list)
+{
+ location_t loc = c_parser_peek_token (parser)->location;
+ VEC (c_expr_t,gc) *cexpr_list;
+ c_expr_t expr;
+
+ *ret_cexpr_list = NULL;
+ if (c_parser_next_token_is_not (parser, CPP_OPEN_PAREN))
+ {
+ error_at (loc, "cannot take address of %qs", bname);
+ return false;
+ }
+
+ c_parser_consume_token (parser);
+
+ if (c_parser_next_token_is (parser, CPP_CLOSE_PAREN))
+ {
+ c_parser_consume_token (parser);
+ return true;
+ }
+
+ expr = c_parser_expr_no_commas (parser, NULL);
+ cexpr_list = VEC_alloc (c_expr_t, gc, 1);
+ C_EXPR_APPEND (cexpr_list, expr);
+ while (c_parser_next_token_is (parser, CPP_COMMA))
+ {
+ c_parser_consume_token (parser);
+ expr = c_parser_expr_no_commas (parser, NULL);
+ C_EXPR_APPEND (cexpr_list, expr);
+ }
+
+ if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"))
+ return false;
+
+ *ret_cexpr_list = cexpr_list;
+ return true;
+}
+
+
/* Parse a postfix expression (C90 6.3.1-6.3.2, C99 6.5.1-6.5.2).
postfix-expression:
assignment-expression ,
assignment-expression )
__builtin_types_compatible_p ( type-name , type-name )
+ __builtin_complex ( assignment-expression , assignment-expression )
+ __builtin_shuffle ( assignment-expression , assignment-expression )
+ __builtin_shuffle ( assignment-expression ,
+ assignment-expression ,
+ assignment-expression, )
offsetof-member-designator:
identifier
static struct c_expr
c_parser_postfix_expression (c_parser *parser)
{
- struct c_expr expr, e1, e2, e3;
+ struct c_expr expr, e1;
struct c_type_name *t1, *t2;
location_t loc = c_parser_peek_token (parser)->location;;
expr.original_code = ERROR_MARK;
c_parser_error (parser, "expected identifier");
c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
"expected %<)%>");
- expr.value = fold_offsetof (offsetof_ref, NULL_TREE);
+ expr.value = fold_offsetof (offsetof_ref);
}
break;
case RID_CHOOSE_EXPR:
- c_parser_consume_token (parser);
- if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
- {
- expr.value = error_mark_node;
- break;
- }
- loc = c_parser_peek_token (parser)->location;
- e1 = c_parser_expr_no_commas (parser, NULL);
- if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
- {
- c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
- expr.value = error_mark_node;
- break;
- }
- e2 = c_parser_expr_no_commas (parser, NULL);
- if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
- {
- c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
- expr.value = error_mark_node;
- break;
- }
- e3 = c_parser_expr_no_commas (parser, NULL);
- c_parser_skip_until_found (parser, CPP_CLOSE_PAREN,
- "expected %<)%>");
{
+ VEC (c_expr_t, gc) *cexpr_list;
+ c_expr_t *e1_p, *e2_p, *e3_p;
tree c;
- c = e1.value;
- mark_exp_read (e2.value);
- mark_exp_read (e3.value);
+ c_parser_consume_token (parser);
+ if (!c_parser_get_builtin_args (parser,
+ "__builtin_choose_expr",
+ &cexpr_list))
+ {
+ expr.value = error_mark_node;
+ break;
+ }
+
+ if (VEC_length (c_expr_t, cexpr_list) != 3)
+ {
+ error_at (loc, "wrong number of arguments to "
+ "%<__builtin_choose_expr%>");
+ expr.value = error_mark_node;
+ break;
+ }
+
+ e1_p = VEC_index (c_expr_t, cexpr_list, 0);
+ e2_p = VEC_index (c_expr_t, cexpr_list, 1);
+ e3_p = VEC_index (c_expr_t, cexpr_list, 2);
+
+ c = e1_p->value;
+ mark_exp_read (e2_p->value);
+ mark_exp_read (e3_p->value);
if (TREE_CODE (c) != INTEGER_CST
|| !INTEGRAL_TYPE_P (TREE_TYPE (c)))
error_at (loc,
"first argument to %<__builtin_choose_expr%> not"
" a constant");
constant_expression_warning (c);
- expr = integer_zerop (c) ? e3 : e2;
+ expr = integer_zerop (c) ? *e3_p : *e2_p;
+ break;
}
- break;
case RID_TYPES_COMPATIBLE_P:
c_parser_consume_token (parser);
if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
"expected %<)%>");
{
tree e1, e2;
+ e1 = groktypename (t1, NULL, NULL);
+ e2 = groktypename (t2, NULL, NULL);
+ if (e1 == error_mark_node || e2 == error_mark_node)
+ {
+ expr.value = error_mark_node;
+ break;
+ }
- e1 = TYPE_MAIN_VARIANT (groktypename (t1, NULL, NULL));
- e2 = TYPE_MAIN_VARIANT (groktypename (t2, NULL, NULL));
+ e1 = TYPE_MAIN_VARIANT (e1);
+ e2 = TYPE_MAIN_VARIANT (e2);
expr.value
= comptypes (e1, e2) ? integer_one_node : integer_zero_node;
}
break;
+ case RID_BUILTIN_COMPLEX:
+ {
+ VEC(c_expr_t, gc) *cexpr_list;
+ c_expr_t *e1_p, *e2_p;
+
+ c_parser_consume_token (parser);
+ if (!c_parser_get_builtin_args (parser,
+ "__builtin_complex",
+ &cexpr_list))
+ {
+ expr.value = error_mark_node;
+ break;
+ }
+
+ if (VEC_length (c_expr_t, cexpr_list) != 2)
+ {
+ error_at (loc, "wrong number of arguments to "
+ "%<__builtin_complex%>");
+ expr.value = error_mark_node;
+ break;
+ }
+
+ e1_p = VEC_index (c_expr_t, cexpr_list, 0);
+ e2_p = VEC_index (c_expr_t, cexpr_list, 1);
+
+ mark_exp_read (e1_p->value);
+ if (TREE_CODE (e1_p->value) == EXCESS_PRECISION_EXPR)
+ e1_p->value = convert (TREE_TYPE (e1_p->value),
+ TREE_OPERAND (e1_p->value, 0));
+ mark_exp_read (e2_p->value);
+ if (TREE_CODE (e2_p->value) == EXCESS_PRECISION_EXPR)
+ e2_p->value = convert (TREE_TYPE (e2_p->value),
+ TREE_OPERAND (e2_p->value, 0));
+ if (!SCALAR_FLOAT_TYPE_P (TREE_TYPE (e1_p->value))
+ || DECIMAL_FLOAT_TYPE_P (TREE_TYPE (e1_p->value))
+ || !SCALAR_FLOAT_TYPE_P (TREE_TYPE (e2_p->value))
+ || DECIMAL_FLOAT_TYPE_P (TREE_TYPE (e2_p->value)))
+ {
+ error_at (loc, "%<__builtin_complex%> operand "
+ "not of real binary floating-point type");
+ expr.value = error_mark_node;
+ break;
+ }
+ if (TYPE_MAIN_VARIANT (TREE_TYPE (e1_p->value))
+ != TYPE_MAIN_VARIANT (TREE_TYPE (e2_p->value)))
+ {
+ error_at (loc,
+ "%<__builtin_complex%> operands of different types");
+ expr.value = error_mark_node;
+ break;
+ }
+ if (!flag_isoc99)
+ pedwarn (loc, OPT_pedantic,
+ "ISO C90 does not support complex types");
+ expr.value = build2 (COMPLEX_EXPR,
+ build_complex_type
+ (TYPE_MAIN_VARIANT
+ (TREE_TYPE (e1_p->value))),
+ e1_p->value, e2_p->value);
+ break;
+ }
+ case RID_BUILTIN_SHUFFLE:
+ {
+ VEC(c_expr_t,gc) *cexpr_list;
+ unsigned int i;
+ c_expr_t *p;
+
+ c_parser_consume_token (parser);
+ if (!c_parser_get_builtin_args (parser,
+ "__builtin_shuffle",
+ &cexpr_list))
+ {
+ expr.value = error_mark_node;
+ break;
+ }
+
+ FOR_EACH_VEC_ELT (c_expr_t, cexpr_list, i, p)
+ mark_exp_read (p->value);
+
+ if (VEC_length (c_expr_t, cexpr_list) == 2)
+ expr.value =
+ c_build_vec_perm_expr
+ (loc, VEC_index (c_expr_t, cexpr_list, 0)->value,
+ NULL_TREE, VEC_index (c_expr_t, cexpr_list, 1)->value);
+
+ else if (VEC_length (c_expr_t, cexpr_list) == 3)
+ expr.value =
+ c_build_vec_perm_expr
+ (loc, VEC_index (c_expr_t, cexpr_list, 0)->value,
+ VEC_index (c_expr_t, cexpr_list, 1)->value,
+ VEC_index (c_expr_t, cexpr_list, 2)->value);
+ else
+ {
+ error_at (loc, "wrong number of arguments to "
+ "%<__builtin_shuffle%>");
+ expr.value = error_mark_node;
+ }
+ break;
+ }
case RID_AT_SELECTOR:
gcc_assert (c_dialect_objc ());
c_parser_consume_token (parser);
{
location_t expr_loc = c_parser_peek_token (parser)->location;
tree c, t = c_parser_expression (parser).value;
+ mark_exp_read (t);
t = c_fully_fold (t, false, NULL);
c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, "expected %<)%>");
here = c_parser_peek_token (parser)->location;
t = c_parser_expr_no_commas (parser, NULL).value;
+ mark_exp_read (t);
t = c_fully_fold (t, false, NULL);
if (OMP_CLAUSE_SCHEDULE_KIND (c) == OMP_CLAUSE_SCHEDULE_RUNTIME)
c_parser_skip_to_pragma_eol (parser);
}
+/* Parse a transaction attribute (GCC Extension).
+
+ transaction-attribute:
+ attributes
+ [ [ any-word ] ]
+
+ The transactional memory language description is written for C++,
+ and uses the C++0x attribute syntax. For compatibility, allow the
+ bracket style for transactions in C as well. */
+
+static tree
+c_parser_transaction_attributes (c_parser *parser)
+{
+ tree attr_name, attr = NULL;
+
+ if (c_parser_next_token_is_keyword (parser, RID_ATTRIBUTE))
+ return c_parser_attributes (parser);
+
+ if (!c_parser_next_token_is (parser, CPP_OPEN_SQUARE))
+ return NULL_TREE;
+ c_parser_consume_token (parser);
+ if (!c_parser_require (parser, CPP_OPEN_SQUARE, "expected %<[%>"))
+ goto error1;
+
+ attr_name = c_parser_attribute_any_word (parser);
+ if (attr_name)
+ {
+ c_parser_consume_token (parser);
+ attr = build_tree_list (attr_name, NULL_TREE);
+ }
+ else
+ c_parser_error (parser, "expected identifier");
+
+ c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, "expected %<]%>");
+ error1:
+ c_parser_skip_until_found (parser, CPP_CLOSE_SQUARE, "expected %<]%>");
+ return attr;
+}
+
+/* Parse a __transaction_atomic or __transaction_relaxed statement
+ (GCC Extension).
+
+ transaction-statement:
+ __transaction_atomic transaction-attribute[opt] compound-statement
+ __transaction_relaxed compound-statement
+
+ Note that the only valid attribute is: "outer".
+*/
+
+static tree
+c_parser_transaction (c_parser *parser, enum rid keyword)
+{
+ unsigned int old_in = parser->in_transaction;
+ unsigned int this_in = 1, new_in;
+ location_t loc = c_parser_peek_token (parser)->location;
+ tree stmt, attrs;
+
+ gcc_assert ((keyword == RID_TRANSACTION_ATOMIC
+ || keyword == RID_TRANSACTION_RELAXED)
+ && c_parser_next_token_is_keyword (parser, keyword));
+ c_parser_consume_token (parser);
+
+ if (keyword == RID_TRANSACTION_RELAXED)
+ this_in |= TM_STMT_ATTR_RELAXED;
+ else
+ {
+ attrs = c_parser_transaction_attributes (parser);
+ if (attrs)
+ this_in |= parse_tm_stmt_attr (attrs, TM_STMT_ATTR_OUTER);
+ }
+
+ /* Keep track if we're in the lexical scope of an outer transaction. */
+ new_in = this_in | (old_in & TM_STMT_ATTR_OUTER);
+
+ parser->in_transaction = new_in;
+ stmt = c_parser_compound_statement (parser);
+ parser->in_transaction = old_in;
+
+ if (flag_tm)
+ stmt = c_finish_transaction (loc, stmt, this_in);
+ else
+ error_at (loc, (keyword == RID_TRANSACTION_ATOMIC ?
+ "%<__transaction_atomic%> without transactional memory support enabled"
+ : "%<__transaction_relaxed %> "
+ "without transactional memory support enabled"));
+
+ return stmt;
+}
+
+/* Parse a __transaction_atomic or __transaction_relaxed expression
+ (GCC Extension).
+
+ transaction-expression:
+ __transaction_atomic ( expression )
+ __transaction_relaxed ( expression )
+*/
+
+static struct c_expr
+c_parser_transaction_expression (c_parser *parser, enum rid keyword)
+{
+ struct c_expr ret;
+ unsigned int old_in = parser->in_transaction;
+ unsigned int this_in = 1;
+ location_t loc = c_parser_peek_token (parser)->location;
+ tree attrs;
+
+ gcc_assert ((keyword == RID_TRANSACTION_ATOMIC
+ || keyword == RID_TRANSACTION_RELAXED)
+ && c_parser_next_token_is_keyword (parser, keyword));
+ c_parser_consume_token (parser);
+
+ if (keyword == RID_TRANSACTION_RELAXED)
+ this_in |= TM_STMT_ATTR_RELAXED;
+ else
+ {
+ attrs = c_parser_transaction_attributes (parser);
+ if (attrs)
+ this_in |= parse_tm_stmt_attr (attrs, 0);
+ }
+
+ parser->in_transaction = this_in;
+ if (c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
+ {
+ tree expr = c_parser_expression (parser).value;
+ ret.original_type = TREE_TYPE (expr);
+ ret.value = build1 (TRANSACTION_EXPR, ret.original_type, expr);
+ if (this_in & TM_STMT_ATTR_RELAXED)
+ TRANSACTION_EXPR_RELAXED (ret.value) = 1;
+ SET_EXPR_LOCATION (ret.value, loc);
+ ret.original_code = TRANSACTION_EXPR;
+ if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"))
+ {
+ c_parser_skip_until_found (parser, CPP_CLOSE_PAREN, NULL);
+ goto error;
+ }
+ }
+ else
+ {
+ error:
+ ret.value = error_mark_node;
+ ret.original_code = ERROR_MARK;
+ ret.original_type = NULL;
+ }
+ parser->in_transaction = old_in;
+
+ if (!flag_tm)
+ error_at (loc, (keyword == RID_TRANSACTION_ATOMIC ?
+ "%<__transaction_atomic%> without transactional memory support enabled"
+ : "%<__transaction_relaxed %> "
+ "without transactional memory support enabled"));
+
+ return ret;
+}
+
+/* Parse a __transaction_cancel statement (GCC Extension).
+
+ transaction-cancel-statement:
+ __transaction_cancel transaction-attribute[opt] ;
+
+ Note that the only valid attribute is "outer".
+*/
+
+static tree
+c_parser_transaction_cancel(c_parser *parser)
+{
+ location_t loc = c_parser_peek_token (parser)->location;
+ tree attrs;
+ bool is_outer = false;
+
+ gcc_assert (c_parser_next_token_is_keyword (parser, RID_TRANSACTION_CANCEL));
+ c_parser_consume_token (parser);
+
+ attrs = c_parser_transaction_attributes (parser);
+ if (attrs)
+ is_outer = (parse_tm_stmt_attr (attrs, TM_STMT_ATTR_OUTER) != 0);
+
+ if (!flag_tm)
+ {
+ error_at (loc, "%<__transaction_cancel%> without "
+ "transactional memory support enabled");
+ goto ret_error;
+ }
+ else if (parser->in_transaction & TM_STMT_ATTR_RELAXED)
+ {
+ error_at (loc, "%<__transaction_cancel%> within a "
+ "%<__transaction_relaxed%>");
+ goto ret_error;
+ }
+ else if (is_outer)
+ {
+ if ((parser->in_transaction & TM_STMT_ATTR_OUTER) == 0
+ && !is_tm_may_cancel_outer (current_function_decl))
+ {
+ error_at (loc, "outer %<__transaction_cancel%> not "
+ "within outer %<__transaction_atomic%>");
+ error_at (loc, " or a %<transaction_may_cancel_outer%> function");
+ goto ret_error;
+ }
+ }
+ else if (parser->in_transaction == 0)
+ {
+ error_at (loc, "%<__transaction_cancel%> not within "
+ "%<__transaction_atomic%>");
+ goto ret_error;
+ }
+
+ return add_stmt (build_tm_abort_call (loc, is_outer));
+
+ ret_error:
+ return build1 (NOP_EXPR, void_type_node, error_mark_node);
+}
\f
/* Parse a single source file. */
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