--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/graphite/pr83963.c	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,31 @@
+/* { dg-do compile } */
+/* { dg-options "-O -floop-nest-optimize -fno-tree-loop-im" } */
+
+int mg, et;
+
+void
+s5 (int is)
+{
+  if (is == 0)
+    {
+g6:
+      ++is;
+    }
+
+  while (mg < 1)
+    {
+      while (et < 1)
+	{
+	  if (is == 0)
+	    return;
+
+	  ++et;
+	}
+
+      while (mg < 1)
+	++mg;
+    }
+
+  goto g6;
+}
+