diff options
Diffstat (limited to 'gcc/c-common.c')
| -rw-r--r-- | gcc/c-common.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/gcc/c-common.c b/gcc/c-common.c index a47385b..499829b 100644 --- a/gcc/c-common.c +++ b/gcc/c-common.c @@ -4351,11 +4351,29 @@ handle_mode_attribute (tree *node, tree name, tree args, } else typefm = lang_hooks.types.type_for_mode (mode, TYPE_UNSIGNED (type)); + if (typefm == NULL_TREE) { error ("no data type for mode %<%s%>", p); return NULL_TREE; } + else if (TREE_CODE (type) == ENUMERAL_TYPE) + { + /* For enumeral types, copy the precision from the integer + type returned above. If not an INTEGER_TYPE, we can't use + this mode for this type. */ + if (TREE_CODE (typefm) != INTEGER_TYPE) + { + error ("cannot use mode '%s' for enumeral types", + GET_MODE_NAME (mode)); + return NULL_TREE; + } + + if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE)) + type = build_variant_type_copy (type); + TYPE_PRECISION (type) = TYPE_PRECISION (typefm); + typefm = type; + } *node = typefm; /* No need to layout the type here. The caller should do this. */ |