--- old/src/share/vm/opto/machnode.hpp	2016-07-03 23:42:59.215513675 +0900
+++ new/src/share/vm/opto/machnode.hpp	2016-07-03 23:42:59.077514249 +0900
@@ -190,7 +190,7 @@
   }
   // Required boilerplate
   virtual uint size_of() const { return sizeof(MachNode); }
-  virtual int  Opcode() const;          // Always equal to MachNode
+  virtual uint Opcode() const;          // Always equal to MachNode
   virtual uint rule() const = 0;        // Machine-specific opcode
   // Number of inputs which come before the first operand.
   // Generally at least 1, to skip the Control input
@@ -708,7 +708,7 @@
     unmatched_proj = 0,         // Projs for Control, I/O, memory not matched
     fat_proj       = 999        // Projs killing many regs, defined by _rout
   };
-  virtual int   Opcode() const;
+  virtual uint  Opcode() const;
   virtual const Type *bottom_type() const;
   virtual const TypePtr *adr_type() const;
   virtual const RegMask &in_RegMask(uint) const { return RegMask::Empty; }