--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/ucnid-6.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,28 @@
+/* { dg-do run } */
+/* { dg-xfail-if "" { "powerpc-ibm-aix*" } } */
+/* { dg-skip-if "" { ! ucn } } */
+/* { dg-options "-std=c99 -save-temps -g" } */
+void abort (void);
+
+int \u00C0(void) { return 1; }
+int \u00C1(void) { return 2; }
+int \U000000C2(void) { return 3; }
+int wh\u00ff(void) { return 4; }
+int a\u00c4b\u0441\U000003b4e(void) { return 5; }
+
+int main (void)
+{
+  
+  if (\u00C0() != 1)
+    abort ();
+  if (\u00c1() != 2)
+    abort ();
+  if (\u00C2() != 3)
+    abort ();
+  if (wh\u00ff() != 4)
+    abort ();
+  if (a\u00c4b\u0441\U000003b4e() != 5)
+    abort ();
+  
+  return 0;
+}