--- a/hotspot/src/share/vm/adlc/formssel.cpp	Wed Dec 07 11:35:03 2011 +0100
+++ b/hotspot/src/share/vm/adlc/formssel.cpp	Tue Dec 20 16:56:50 2011 +0100
@@ -627,6 +627,7 @@
   if( strcmp(_matrule->_opType,"MemBarAcquire") == 0 ) return true;
   if( strcmp(_matrule->_opType,"MemBarReleaseLock") == 0 ) return true;
   if( strcmp(_matrule->_opType,"MemBarAcquireLock") == 0 ) return true;
+  if( strcmp(_matrule->_opType,"MemBarStoreStore") == 0 ) return true;
 
   return false;
 }
@@ -3978,7 +3979,8 @@
     !strcmp(_opType,"MemBarAcquireLock") ||
     !strcmp(_opType,"MemBarReleaseLock") ||
     !strcmp(_opType,"MemBarVolatile" ) ||
-    !strcmp(_opType,"MemBarCPUOrder" ) ;
+    !strcmp(_opType,"MemBarCPUOrder" ) ||
+    !strcmp(_opType,"MemBarStoreStore" );
 }
 
 bool MatchRule::is_ideal_loadPC() const {