diff options
Diffstat (limited to 'gcc/c-common.c')
| -rw-r--r-- | gcc/c-common.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/gcc/c-common.c b/gcc/c-common.c index 39868e8..313af75 100644 --- a/gcc/c-common.c +++ b/gcc/c-common.c @@ -537,6 +537,7 @@ static tree handle_tls_model_attribute (tree *, tree, tree, int, static tree handle_no_instrument_function_attribute (tree *, tree, tree, int, bool *); static tree handle_malloc_attribute (tree *, tree, tree, int, bool *); +static tree handle_returns_twice_attribute (tree *, tree, tree, int, bool *); static tree handle_no_limit_stack_attribute (tree *, tree, tree, int, bool *); static tree handle_pure_attribute (tree *, tree, tree, int, bool *); @@ -607,6 +608,8 @@ const struct attribute_spec c_common_attribute_table[] = handle_no_instrument_function_attribute }, { "malloc", 0, 0, true, false, false, handle_malloc_attribute }, + { "returns_twice", 0, 0, true, false, false, + handle_returns_twice_attribute }, { "no_stack_limit", 0, 0, true, false, false, handle_no_limit_stack_attribute }, { "pure", 0, 0, true, false, false, @@ -4787,6 +4790,24 @@ handle_malloc_attribute (tree *node, tree name, tree ARG_UNUSED (args), return NULL_TREE; } +/* Handle a "returns_twice" attribute; arguments as in + struct attribute_spec.handler. */ + +static tree +handle_returns_twice_attribute (tree *node, tree name, tree ARG_UNUSED (args), + int ARG_UNUSED (flags), bool *no_add_attrs) +{ + if (TREE_CODE (*node) == FUNCTION_DECL) + DECL_IS_RETURNS_TWICE (*node) = 1; + else + { + warning ("%qs attribute ignored", IDENTIFIER_POINTER (name)); + *no_add_attrs = true; + } + + return NULL_TREE; +} + /* Handle a "no_limit_stack" attribute; arguments as in struct attribute_spec.handler. */ |