diff -r 910a4cb98e9e -r 6ca61c728c2d src/share/vm/opto/idealGraphPrinter.cpp
--- a/src/share/vm/opto/idealGraphPrinter.cpp	Fri Jul 25 09:07:29 2008 -0700
+++ b/src/share/vm/opto/idealGraphPrinter.cpp	Fri Jul 25 11:32:56 2008 -0700
@@ -473,10 +473,12 @@
         print_prop("is_dontcare", "false");
       }
 
+#ifdef ASSERT
       Node* old = C->matcher()->find_old_node(node);
       if (old != NULL) {
         print_prop("old_node_idx", old->_idx);
       }
+#endif
     }
 
     if (node->is_Proj()) {