diff -r d678e3277048 -r 6027dddc26c6 src/share/vm/opto/loopTransform.cpp
--- a/src/share/vm/opto/loopTransform.cpp	Mon Jun 28 10:52:50 2010 -0700
+++ b/src/share/vm/opto/loopTransform.cpp	Mon Jun 28 14:54:39 2010 -0700
@@ -194,8 +194,7 @@
     addx = new (phase->C, 3) AddINode(x, inv);
   }
   phase->register_new_node(addx, phase->get_ctrl(x));
-  phase->_igvn.hash_delete(n1);
-  phase->_igvn.subsume_node(n1, addx);
+  phase->_igvn.replace_node(n1, addx);
   return addx;
 }
 
@@ -1586,8 +1585,7 @@
   Node *phi = cl->phi();
   Node *final = new (phase->C, 3) SubINode( cl->limit(), cl->stride() );
   phase->register_new_node(final,cl->in(LoopNode::EntryControl));
-  phase->_igvn.hash_delete(phi);
-  phase->_igvn.subsume_node(phi,final);
+  phase->_igvn.replace_node(phi,final);
   phase->C->set_major_progress();
   return true;
 }