--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/diagnostic/aka4.C	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,9 @@
+typedef unsigned int myvec __attribute__((vector_size (16)));
+
+void f (float x)
+{
+  myvec y = x; // { dg-error {cannot convert 'float' to 'myvec' {aka '__vector\([48]\) unsigned int'} in initialization} }
+  myvec *ptr = &x; // { dg-error {cannot convert 'float\*' to 'myvec\*' {aka '__vector\([48]\) unsigned int\*'} in initialization} }
+  const myvec *const_ptr = &x; // { dg-error {cannot convert 'float\*' to 'const myvec\*' {aka 'const __vector\([48]\) unsigned int\*'} in initialization} }
+  volatile myvec *volatile_ptr = &x; // { dg-error {cannot convert 'float\*' to 'volatile myvec\*' {aka 'volatile __vector\([48]\) unsigned int\*'} in initialization} }
+}