--- old/src/share/vm/opto/matcher.hpp	Mon Apr 20 12:36:12 2009
+++ new/src/share/vm/opto/matcher.hpp	Mon Apr 20 12:36:12 2009
@@ -109,6 +109,9 @@
   Node* _mem_node;   // Ideal memory node consumed by mach node
 #endif
 
+  // Mach node for ConP #NULL
+  MachNode* _machConP0;
+
 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* machConP0() const { return _machConP0; }
+
   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; }