diff -r 11211f7cb5a0 -r 1af104d6cf99 src/share/vm/opto/matcher.cpp
--- a/src/share/vm/opto/matcher.cpp	Tue Aug 16 11:53:57 2011 -0700
+++ b/src/share/vm/opto/matcher.cpp	Tue Aug 16 16:59:46 2011 -0700
@@ -826,6 +826,7 @@
     switch (n->Opcode()) {
     case Op_PrefetchRead:
     case Op_PrefetchWrite:
+    case Op_PrefetchAllocation:
       nidx = Compile::AliasIdxRaw;
       nat = TypeRawPtr::BOTTOM;
       break;