src/share/vm/opto/connode.hpp

rev 5968 : 8031320: Use Intel RTM instructions for locks
Summary: Use RTM for inflated locks and stack locks.
Reviewed-by: iveresov, twisti, roland, dcubed

*** 640,649 ****
--- 640,662 ----
    }
    virtual int Opcode() const;
    virtual const Type *bottom_type() const { return TypeInt::INT; }
  };
  
+ //------------------------------Opaque3Node------------------------------------
+ // A node to prevent unwanted optimizations. Will be optimized only during
+ // macro nodes expansion.
+ class Opaque3Node : public Opaque2Node {
+   int _opt; // what optimization it was used for
+ public:
+   enum { RTM_OPT };
+   Opaque3Node(Compile* C, Node *n, int opt) : Opaque2Node(C, n), _opt(opt) {}
+   virtual int Opcode() const;
+   bool rtm_opt() const { return (_opt == RTM_OPT); }
+ };
+ 
+ 
  //----------------------PartialSubtypeCheckNode--------------------------------
  // The 2nd slow-half of a subtype check.  Scan the subklass's 2ndary superklass
  // array for an instance of the superklass.  Set a hidden internal cache on a
  // hit (cache is checked with exposed code in gen_subtype_check()).  Return
  // not zero for a miss or zero for a hit.