--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/tree-ssa/loop-interchange-13.c	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,53 @@
+/* { dg-do run } */
+/* { dg-options "-O2 -floop-interchange -fdump-tree-linterchange-details" } */
+
+/* Copied from graphite/interchange-4.c */
+
+#define DEBUG 0
+#if DEBUG
+#include <stdio.h>
+#endif
+
+unsigned u[1024];
+
+static void __attribute__((noinline,noclone,noipa))
+foo (int N, int M, unsigned *res)
+{
+  int i, j;
+  unsigned sum = 0;
+  if (N > 0)
+    for (i = 0; i < M; i++)
+      for (j = 0; j < N; j++)
+	sum = u[i + 3 * j] - sum;
+
+  *res = sum;
+}
+
+extern void abort ();
+
+int
+main (void)
+{
+  int i, j;
+  unsigned res;
+
+  u[0] = 1;
+  u[1] = 2;
+  u[2] = 4;
+  u[3] = 5;
+  u[4] = 7;
+  u[5] = 8;
+
+  foo (2, 3, &res);
+
+#if DEBUG
+  fprintf (stderr, "res = %d \n", res);
+#endif
+
+  if (res != 13)
+    abort ();
+
+  return 0;
+}
+
+/* { dg-final { scan-tree-dump-not "is interchanged" "linterchange"} } */