--- old/src/share/vm/opto/graphKit.hpp	2016-01-28 13:41:50.388428333 +0100
+++ new/src/share/vm/opto/graphKit.hpp	2016-01-28 13:41:50.112899848 +0100
@@ -834,6 +834,7 @@
   int next_monitor();
   Node* insert_mem_bar(int opcode, Node* precedent = NULL);
   Node* insert_mem_bar_volatile(int opcode, int alias_idx, Node* precedent = NULL);
+  void insert_store_load_for_barrier();
   // Optional 'precedent' is appended as an extra edge, to force ordering.
   FastLockNode* shared_lock(Node* obj);
   void shared_unlock(Node* box, Node* obj);
--- old/src/share/vm/opto/graphKit.cpp	2016-01-28 13:41:50.433815556 +0100
+++ new/src/share/vm/opto/graphKit.cpp	2016-01-28 13:41:50.077975172 +0100
@@ -3149,6 +3149,19 @@
   return membar;
 }
 
+void GraphKit::insert_store_load_for_barrier() {
+  Node* mem = reset_memory();
+  MemBarNode* mb = MemBarNode::make(C, Op_MemBarVolatile, Compile::AliasIdxBot);
+  mb->init_req(TypeFunc::Control, control());
+  mb->init_req(TypeFunc::Memory, mem);
+  Node* membar = _gvn.transform(mb);
+  set_control(_gvn.transform(new ProjNode(membar, TypeFunc::Control)));
+  Node* newmem = _gvn.transform(new ProjNode(membar, TypeFunc::Memory));
+  set_all_memory(mem);
+  set_memory(newmem, Compile::AliasIdxRaw);
+}
+
+
 //------------------------------shared_lock------------------------------------
 // Emit locking code.
 FastLockNode* GraphKit::shared_lock(Node* obj) {
@@ -3840,7 +3853,7 @@
   BasicType bt = T_BYTE;
 
   if (UseConcMarkSweepGC && UseCondCardMark) {
-    insert_mem_bar(Op_MemBarVolatile);   // StoreLoad barrier
+    insert_store_load_for_barrier();
     __ sync_kit(this);
   }
 
@@ -4280,8 +4293,7 @@
 
         __ if_then(card_val, BoolTest::ne, young_card); {
           sync_kit(ideal);
-          // Use Op_MemBarVolatile to achieve the effect of a StoreLoad barrier.
-          insert_mem_bar(Op_MemBarVolatile, oop_store);
+          insert_store_load_for_barrier();
           __ sync_kit(this);
 
           Node* card_val_reload = __ load(__ ctrl(), card_adr, TypeInt::INT, T_BYTE, Compile::AliasIdxRaw);