--- a/hotspot/src/cpu/sparc/vm/sparc.ad	Wed Dec 07 11:35:03 2011 +0100
+++ b/hotspot/src/cpu/sparc/vm/sparc.ad	Tue Dec 20 16:56:50 2011 +0100
@@ -6773,6 +6773,16 @@
   ins_pipe(empty);
 %}
 
+instruct membar_storestore() %{
+  match(MemBarStoreStore);
+  ins_cost(0);
+
+  size(0);
+  format %{ "!MEMBAR-storestore (empty encoding)" %}
+  ins_encode( );
+  ins_pipe(empty);
+%}
+
 //----------Register Move Instructions-----------------------------------------
 instruct roundDouble_nop(regD dst) %{
   match(Set dst (RoundDouble dst));