diff -r 8c9029c01470 -r d2a189b83b87 hotspot/src/share/vm/opto/lcm.cpp
--- a/hotspot/src/share/vm/opto/lcm.cpp	Mon Oct 08 17:04:00 2012 -0700
+++ b/hotspot/src/share/vm/opto/lcm.cpp	Tue Oct 09 10:11:38 2012 +0200
@@ -164,6 +164,7 @@
     case Op_StoreL:
     case Op_StoreP:
     case Op_StoreN:
+    case Op_StoreNKlass:
       was_store = true;         // Memory op is a store op
       // Stores will have their address in slot 2 (memory in slot 1).
       // If the value being nul-checked is in another slot, it means we