--- old/src/share/vm/opto/matcher.cpp	Tue Aug 16 10:00:34 2011
+++ new/src/share/vm/opto/matcher.cpp	Tue Aug 16 10:00:34 2011
@@ -826,6 +826,7 @@
     switch (n->Opcode()) {
     case Op_PrefetchRead:
     case Op_PrefetchWrite:
+    case Op_PrefetchAllocation:
       nidx = Compile::AliasIdxRaw;
       nat = TypeRawPtr::BOTTOM;
       break;