--- a/hotspot/src/share/vm/opto/opcodes.hpp	Fri Apr 11 09:56:35 2008 -0400
+++ b/hotspot/src/share/vm/opto/opcodes.hpp	Sun Apr 13 17:43:42 2008 -0400
@@ -27,6 +27,7 @@
 enum Opcodes {
   Op_Node = 0,
   macro(Set)                    // Instruction selection match rule
+  macro(RegN)                   // Machine narrow oop register
   macro(RegI)                   // Machine integer register
   macro(RegP)                   // Machine pointer register
   macro(RegF)                   // Machine float   register