--- old/src/share/vm/opto/locknode.hpp	2016-07-03 23:42:58.074518417 +0900
+++ new/src/share/vm/opto/locknode.hpp	2016-07-03 23:42:57.936518991 +0900
@@ -40,7 +40,7 @@
 
 public:
   BoxLockNode( int lock );
-  virtual int Opcode() const;
+  virtual uint Opcode() const;
   virtual void emit(CodeBuffer &cbuf, PhaseRegAlloc *ra_) const;
   virtual uint size(PhaseRegAlloc *ra_) const;
   virtual const RegMask &in_RegMask(uint) const;
@@ -95,7 +95,7 @@
   virtual uint hash() const ;                  // { return NO_HASH; }
   virtual uint size_of() const;
   virtual uint cmp( const Node &n ) const ;    // Always fail, except on self
-  virtual int Opcode() const;
+  virtual uint Opcode() const;
   virtual const Type* Value(PhaseGVN* phase) const { return TypeInt::CC; }
   const Type *sub(const Type *t1, const Type *t2) const { return TypeInt::CC;}
 
@@ -122,7 +122,7 @@
   // LockNode/UnLockNode to avoid creating Phi's.
   virtual uint hash() const ;                  // { return NO_HASH; }
   virtual uint cmp( const Node &n ) const ;    // Always fail, except on self
-  virtual int Opcode() const;
+  virtual uint Opcode() const;
   virtual const Type* Value(PhaseGVN* phase) const { return TypeInt::CC; }
   const Type *sub(const Type *t1, const Type *t2) const { return TypeInt::CC;}