--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/graphite/pr68715-2.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,35 @@
+/* { dg-do compile } */
+/* { dg-options "-Ofast -floop-interchange" } */
+
+int a, b, c, d, f, g;
+int e[1], h[1];
+void fn2 ();
+void fn3 ();
+void
+fn1 ()
+{
+  fn2 ();
+  b = 0;
+  for (; b < 10; b++)
+    ;
+}
+
+void
+fn2 ()
+{
+  if (a)
+    {
+      fn3 ();
+      c = d;
+    }
+}
+
+void
+fn3 ()
+{
+  for (; g; g++)
+    e[g] = 2;
+  if (f)
+    for (; g; g++)
+      h[g] = 5;
+}