--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/pr19340.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,27 @@
+/* { dg-do compile } */
+/* { dg-options "-O1 -fschedule-insns2 -fsched2-use-superblocks" } */
+/* { dg-require-effective-target scheduling } */
+
+extern double f (double x);
+
+double g (int a)
+{
+  int b, c, d, e = 0;
+  double h;
+
+  for (d = 0; d < a; d++)
+    for (c = 0; c < a; c++)
+      b = 1;
+
+  h = (double) e / (double) a;
+
+  if (h)
+    {
+      h = 1.0 / h;
+      h = f (h);
+    }
+  else
+    h = 1.0;
+
+  return h;
+}