diff -r 18d56ca3e901 -r ad5dd04754ee src/share/vm/opto/addnode.cpp
--- a/src/share/vm/opto/addnode.cpp	Mon Dec 17 11:00:22 2012 -0800
+++ b/src/share/vm/opto/addnode.cpp	Tue Dec 18 14:55:25 2012 +0100
@@ -189,6 +189,11 @@
       set_req(1, addx);
       set_req(2, a22);
       progress = this;
+      PhaseIterGVN *igvn = phase->is_IterGVN();
+      if (add2->outcnt() == 0 && igvn) {
+        // add disconnected.
+        igvn->_worklist.push(add2);
+      }
     }
   }
 
@@ -624,6 +629,11 @@
     if( t22->singleton() && (t22 != Type::TOP) ) {  // Right input is an add of a constant?
       set_req(Address, phase->transform(new (phase->C) AddPNode(in(Base),in(Address),add->in(1))));
       set_req(Offset, add->in(2));
+      PhaseIterGVN *igvn = phase->is_IterGVN();
+      if (add->outcnt() == 0 && igvn) {
+        // add disconnected.
+        igvn->_worklist.push((Node*)add);
+      }
       return this;              // Made progress
     }
   }