diff options
Diffstat (limited to 'gcc/c-family/c-attribs.cc')
| -rw-r--r-- | gcc/c-family/c-attribs.cc | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/gcc/c-family/c-attribs.cc b/gcc/c-family/c-attribs.cc index 671ea38..92ac93b 100644 --- a/gcc/c-family/c-attribs.cc +++ b/gcc/c-family/c-attribs.cc @@ -101,6 +101,8 @@ static tree handle_special_var_sec_attribute (tree *, tree, tree, int, bool *); static tree handle_aligned_attribute (tree *, tree, tree, int, bool *); static tree handle_warn_if_not_aligned_attribute (tree *, tree, tree, int, bool *); +static tree handle_strict_flex_array_attribute (tree *, tree, tree, + int, bool *); static tree handle_weak_attribute (tree *, tree, tree, int, bool *) ; static tree handle_noplt_attribute (tree *, tree, tree, int, bool *) ; static tree handle_alias_ifunc_attribute (bool, tree *, tree, tree, bool *); @@ -369,6 +371,8 @@ const struct attribute_spec c_common_attribute_table[] = attr_aligned_exclusions }, { "warn_if_not_aligned", 0, 1, false, false, false, false, handle_warn_if_not_aligned_attribute, NULL }, + { "strict_flex_array", 1, 1, true, false, false, false, + handle_strict_flex_array_attribute, NULL }, { "weak", 0, 0, true, false, false, false, handle_weak_attribute, NULL }, { "noplt", 0, 0, true, false, false, false, @@ -2508,6 +2512,49 @@ handle_warn_if_not_aligned_attribute (tree *node, tree name, no_add_attrs, true); } +/* Handle a "strict_flex_array" attribute; arguments as in + struct attribute_spec.handler. */ + +static tree +handle_strict_flex_array_attribute (tree *node, tree name, + tree args, int ARG_UNUSED (flags), + bool *no_add_attrs) +{ + tree decl = *node; + tree argval = TREE_VALUE (args); + + /* This attribute only applies to field decls of a structure. */ + if (TREE_CODE (decl) != FIELD_DECL) + { + error_at (DECL_SOURCE_LOCATION (decl), + "%qE attribute may not be specified for %q+D", name, decl); + *no_add_attrs = true; + } + /* This attribute only applies to field with array type. */ + else if (TREE_CODE (TREE_TYPE (decl)) != ARRAY_TYPE) + { + error_at (DECL_SOURCE_LOCATION (decl), + "%qE attribute may not be specified for a non-array field", + name); + *no_add_attrs = true; + } + else if (TREE_CODE (argval) != INTEGER_CST) + { + error_at (DECL_SOURCE_LOCATION (decl), + "%qE attribute argument not an integer", name); + *no_add_attrs = true; + } + else if (!tree_fits_uhwi_p (argval) || tree_to_uhwi (argval) > 3) + { + error_at (DECL_SOURCE_LOCATION (decl), + "%qE attribute argument %qE is not an integer constant" + " between 0 and 3", name, argval); + *no_add_attrs = true; + } + + return NULL_TREE; +} + /* Handle a "weak" attribute; arguments as in struct attribute_spec.handler. */ |