1 files changed, 19 insertions, 0 deletions
diff --git a/gcc/c/c-objc-common.c b/gcc/c/c-objc-common.c
index 21ca7e6..2b76737 100644
--- a/gcc/c/c-objc-common.c
+++ b/gcc/c/c-objc-common.c
@@ -265,3 +265,22 @@ c_vla_unspec_p (tree x, tree fn ATTRIBUTE_UNUSED)
 {
   return c_vla_type_p (x);
 }
+
+/* Special routine to get the alias set of T for C.  */
+
+alias_set_type
+c_get_alias_set (tree t)
+{
+  /* Allow aliasing between enumeral types and the underlying
+     integer type.  This is required since those are compatible types.  */
+  if (TREE_CODE (t) == ENUMERAL_TYPE)
+    {
+      tree t1 = c_common_type_for_size (tree_to_uhwi (TYPE_SIZE (t)),
+					/* short-cut commoning to signed
+					   type.  */
+					false);
+      return get_alias_set (t1);
+    }
+
+  return c_common_get_alias_set (t);
+}