--- old/src/hotspot/share/opto/graphKit.cpp	2018-10-31 14:22:38.251956202 +0100
+++ new/src/hotspot/share/opto/graphKit.cpp	2018-10-31 14:22:38.128956300 +0100
@@ -1515,7 +1515,8 @@
                                 MemNode::MemOrd mo,
                                 bool require_atomic_access,
                                 bool unaligned,
-                                bool mismatched) {
+                                bool mismatched,
+                                int storeZ) {
   assert(adr_idx != Compile::AliasIdxTop, "use other store_to_memory factory" );
   const TypePtr* adr_type = NULL;
   debug_only(adr_type = C->get_adr_type(adr_idx));
@@ -1525,6 +1526,10 @@
     st = StoreLNode::make_atomic(ctl, mem, adr, adr_type, val, mo);
   } else if (require_atomic_access && bt == T_DOUBLE) {
     st = StoreDNode::make_atomic(ctl, mem, adr, adr_type, val, mo);
+  } else if (bt == T_BYTE && storeZ == 0) {
+    st = new StoreZ0Node(ctl, mem, adr, adr_type, val, mo);
+  } else if (bt == T_BYTE && storeZ == 1) {
+    st = new StoreZ1Node(ctl, mem, adr, adr_type, val, mo);
   } else {
     st = StoreNode::make(_gvn, ctl, mem, adr, adr_type, val, bt, mo);
   }