--- old/src/hotspot/share/opto/loopopts.cpp	2018-01-26 14:05:14.080813678 -0800
+++ new/src/hotspot/share/opto/loopopts.cpp	2018-01-26 14:05:13.311813193 -0800
@@ -1036,7 +1036,7 @@
 
 
 bool PhaseIdealLoop::identical_backtoback_ifs(Node *n) {
-  if (!n->is_If()) {
+  if (!n->is_If() || n->is_CountedLoopEnd()) {
     return false;
   }
   if (!n->in(0)->is_Region()) {