src/share/vm/c1/c1_Instruction.hpp

*** 105,114 ****
--- 105,115 ----
  class         UnsafePrefetchRead;
  class         UnsafePrefetchWrite;
  class   ProfileCall;
  class   ProfileInvoke;
  class   RuntimeCall;
+ class   MemBar;
  
  // A Value is a reference to the instruction creating the value
  typedef Instruction* Value;
  define_array(ValueArray, Value)
  define_stack(Values, ValueArray)
*** 202,211 ****
--- 203,213 ----
    virtual void do_UnsafePrefetchRead (UnsafePrefetchRead*  x) = 0;
    virtual void do_UnsafePrefetchWrite(UnsafePrefetchWrite* x) = 0;
    virtual void do_ProfileCall    (ProfileCall*     x) = 0;
    virtual void do_ProfileInvoke  (ProfileInvoke*   x) = 0;
    virtual void do_RuntimeCall    (RuntimeCall*     x) = 0;
+   virtual void do_MemBar         (MemBar*          x) = 0;
  };
  
  
  // Hashing support
  //
*** 2349,2358 ****
--- 2351,2377 ----
    ValueStack* state()      { return _state; }
    virtual void input_values_do(ValueVisitor*)   {}
    virtual void state_values_do(ValueVisitor*);
  };
  
+ LEAF(MemBar, Instruction)
+  private:
+   LIR_Code _code; 
+ 
+  public:
+   MemBar(LIR_Code code)
+     : Instruction(voidType)
+     , _code(code)
+   {
+     pin();
+   }
+ 
+   LIR_Code code()           { return _code; } 
+ 
+   virtual void input_values_do(ValueVisitor*)   {}
+ };
+ 
  class BlockPair: public CompilationResourceObj {
   private:
    BlockBegin* _from;
    BlockBegin* _to;
   public: