diff -r 069ab3f976d3 -r 1dc233a8c7fe src/share/vm/opto/memnode.hpp
--- a/src/share/vm/opto/memnode.hpp	Wed Dec 07 11:35:03 2011 +0100
+++ b/src/share/vm/opto/memnode.hpp	Tue Dec 20 16:56:50 2011 +0100
@@ -918,6 +918,15 @@
   virtual int Opcode() const;
 };
 
+class MemBarStoreStoreNode: public MemBarNode {
+public:
+  MemBarStoreStoreNode(Compile* C, int alias_idx, Node* precedent)
+    : MemBarNode(C, alias_idx, precedent) {
+    init_class_id(Class_MemBarStoreStore);
+  }
+  virtual int Opcode() const;
+};
+
 // Ordering between a volatile store and a following volatile load.
 // Requires multi-CPU visibility?
 class MemBarVolatileNode: public MemBarNode {
@@ -950,6 +959,8 @@
   };
   int _is_complete;
 
+  bool _does_not_escape;
+
 public:
   enum {
     Control    = TypeFunc::Control,
@@ -989,6 +1000,9 @@
   void set_complete(PhaseGVN* phase);
   void set_complete_with_arraycopy() { _is_complete = Complete | WithArraycopy; }
 
+  bool does_not_escape() { return _does_not_escape; }
+  void set_does_not_escape() { _does_not_escape = true; }
+
 #ifdef ASSERT
   // ensure all non-degenerate stores are ordered and non-overlapping
   bool stores_are_sane(PhaseTransform* phase);