--- old/src/share/vm/adlc/formssel.cpp	Tue Aug 16 10:00:32 2011
+++ new/src/share/vm/adlc/formssel.cpp	Tue Aug 16 10:00:32 2011
@@ -3391,7 +3391,9 @@
     "ClearArray"
   };
   int cnt = sizeof(needs_ideal_memory_list)/sizeof(char*);
-  if( strcmp(_opType,"PrefetchRead")==0 || strcmp(_opType,"PrefetchWrite")==0 )
+  if( strcmp(_opType,"PrefetchRead")==0 ||
+      strcmp(_opType,"PrefetchWrite")==0 ||
+      strcmp(_opType,"PrefetchAllocation")==0 )
     return 1;
   if( _lChild ) {
     const char *opType = _lChild->_opType;