--- a/src/share/vm/opto/loopopts.cpp	Wed Sep 03 14:57:00 2008 -0700
+++ b/src/share/vm/opto/loopopts.cpp	Thu Sep 04 09:03:16 2008 -0700
@@ -932,7 +932,7 @@ void PhaseIdealLoop::split_if_with_block
             // to fold a StoreP and an AddP together (as part of an
             // address expression) and the AddP and StoreP have
             // different controls.
-            if( !x->is_Load() ) _igvn._worklist.yank(x);
+            if( !x->is_Load() && !x->is_DecodeN() ) _igvn._worklist.yank(x);
           }
           _igvn.remove_dead_node(n);
         }