--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/torture/pr87266-4.c	Thu Oct 25 07:37:49 2018 +0900
@@ -0,0 +1,38 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-fno-tree-dominator-opts -fno-tree-forwprop" } */
+
+unsigned long int
+re (long int j9)
+{
+  if (j9 == 0)
+    return 1;
+
+  return j9;
+}
+
+void
+zq (int bt, int yy)
+{
+  int p3 = 0, go = 4, ez = go;
+
+  while (go != 0)
+    {
+      if (ez + !!bt - re (bt) != 0 && go != 0)
+	{
+	  if (yy != 0)
+	    p3 = yy;
+	}
+      else
+	return;
+
+      go = 2;
+    }
+}
+
+void
+my (unsigned long int n6, int bt, int yy)
+{
+  zq (bt, yy);
+  n6 = n6 == bt;
+  zq (bt, yy);
+}