@@ -1763,7 +1763,13 @@ reduced_constant_expression_p (tree t)
/* And we need to handle PTRMEM_CST wrapped in a CONSTRUCTOR. */
tree idx, val, field; unsigned HOST_WIDE_INT i;
if (CONSTRUCTOR_NO_IMPLICIT_ZERO (t))
- field = next_initializable_field (TYPE_FIELDS (TREE_TYPE (t)));
+ {
+ if (TREE_CODE (TREE_TYPE (t)) == VECTOR_TYPE)
+ /* An initialized vector would have a VECTOR_CST. */
+ return false;
+ else
+ field = next_initializable_field (TYPE_FIELDS (TREE_TYPE (t)));
+ }
else
field = NULL_TREE;
FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (t), i, idx, val)
new file mode 100644
@@ -0,0 +1,8 @@
+// PR c++/84424
+// { dg-do compile { target c++11 } }
+// { dg-options "" }
+
+typedef int vec __attribute__ ((vector_size (2 * sizeof (int))));
+
+constexpr vec u = { 1, 2 };
+constexpr vec v = __builtin_shuffle (v, u); // { dg-error "" }