--- old/src/hotspot/share/adlc/forms.cpp	2018-10-31 14:22:34.791958952 +0100
+++ new/src/hotspot/share/adlc/forms.cpp	2018-10-31 14:22:34.668959050 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -271,6 +271,8 @@
 }
 
 Form::DataType Form::is_store_to_memory(const char *opType) const {
+  if( strcmp(opType,"StoreZ0")==0) return Form::idealB;
+  if( strcmp(opType,"StoreZ1")==0) return Form::idealB;
   if( strcmp(opType,"StoreB")==0)  return Form::idealB;
   if( strcmp(opType,"StoreCM")==0) return Form::idealB;
   if( strcmp(opType,"StoreC")==0)  return Form::idealC;