diff -r d092d1b31229 -r 00af3a3a8df4 src/share/vm/opto/memnode.cpp
--- a/src/share/vm/opto/memnode.cpp	Sun Dec 23 17:08:22 2012 +0100
+++ b/src/share/vm/opto/memnode.cpp	Thu Jan 03 15:09:55 2013 -0800
@@ -2725,10 +2725,8 @@
     zend  = phase->transform( new(C) URShiftXNode(zend,  shift) );
   }
 
+  // Bulk clear double-words
   Node* zsize = phase->transform( new(C) SubXNode(zend, zbase) );
-  Node* zinit = phase->zerocon((unit == BytesPerLong) ? T_LONG : T_INT);
-
-  // Bulk clear double-words
   Node* adr = phase->transform( new(C) AddPNode(dest, dest, start_offset) );
   mem = new (C) ClearArrayNode(ctl, mem, zsize, adr);
   return phase->transform(mem);