diff -r 85656c8fa13f -r 04fa5affa478 src/share/vm/opto/matcher.hpp
--- a/src/share/vm/opto/matcher.hpp	Wed Apr 22 06:09:24 2009 -0700
+++ b/src/share/vm/opto/matcher.hpp	Wed Apr 22 17:03:18 2009 -0700
@@ -109,6 +109,9 @@
   Node* _mem_node;   // Ideal memory node consumed by mach node
 #endif
 
+  // Mach node for ConP #NULL
+  MachNode* _mach_null;
+
 public:
   int LabelRootDepth;
   static const int base2reg[];        // Map Types to machine register types
@@ -122,6 +125,8 @@
   static RegMask mreg2regmask[];
   static RegMask STACK_ONLY_mask;
 
+  MachNode* mach_null() const { return _mach_null; }
+
   bool    is_shared( Node *n ) { return _shared.test(n->_idx) != 0; }
   void   set_shared( Node *n ) {  _shared.set(n->_idx); }
   bool   is_visited( Node *n ) { return _visited.test(n->_idx) != 0; }