diff -r 96be33305a55 -r a44a1e70a3e4 hotspot/src/share/vm/opto/memnode.hpp
--- a/hotspot/src/share/vm/opto/memnode.hpp	Tue May 20 06:32:58 2008 -0700
+++ b/hotspot/src/share/vm/opto/memnode.hpp	Wed May 21 10:45:07 2008 -0700
@@ -72,7 +72,8 @@
   // This one should probably be a phase-specific function:
   static bool all_controls_dominate(Node* dom, Node* sub);
 
-  // Is this Node a MemNode or some descendent?  Default is YES.
+  // Find any cast-away of null-ness and keep its control.
+  static  Node *Ideal_common_DU_postCCP( PhaseCCP *ccp, Node* n, Node* adr );
   virtual Node *Ideal_DU_postCCP( PhaseCCP *ccp );
 
   virtual const class TypePtr *adr_type() const;  // returns bottom_type of address
@@ -150,6 +151,9 @@
   // zero out the control input.
   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
 
+  // Split instance field load through Phi.
+  Node* split_through_phi(PhaseGVN *phase);
+
   // Recover original value from boxed values
   Node *eliminate_autobox(PhaseGVN *phase);