src/share/vm/opto/mulnode.hpp

rev 10221 : 8149745: C2 should optimize long accumulations in a counted loop
summary: Look for parallel iv for long adds
Reviewed-by:

*** 39,49 ****
  // multiply-double, and binary-and are all inherited from this class.  The
  // various identity values are supplied by virtual functions.
  class MulNode : public Node {
    virtual uint hash() const;
  public:
!   MulNode( Node *in1, Node *in2 ): Node(0,in1,in2) {
      init_class_id(Class_Mul);
    }
  
    // Handle algebraic identities here.  If we have an identity, return the Node
    // we are equivalent to.  We look for "add of zero" as an identity.
--- 39,49 ----
  // multiply-double, and binary-and are all inherited from this class.  The
  // various identity values are supplied by virtual functions.
  class MulNode : public Node {
    virtual uint hash() const;
  public:
!   MulNode(Node *in1, Node *in2): Node(0,in1,in2) {
      init_class_id(Class_Mul);
    }
  
    // Handle algebraic identities here.  If we have an identity, return the Node
    // we are equivalent to.  We look for "add of zero" as an identity.
*** 59,69 ****
  
    // Supplied function returns the product of the inputs.
    // This also type-checks the inputs for sanity.  Guaranteed never to
    // be passed a TOP or BOTTOM type, these are filtered out by a pre-check.
    // This call recognizes the multiplicative zero type.
!   virtual const Type *mul_ring( const Type *, const Type * ) const = 0;
  
    // Supplied function to return the multiplicative identity type
    virtual const Type *mul_id() const = 0;
  
    // Supplied function to return the additive identity type
--- 59,69 ----
  
    // Supplied function returns the product of the inputs.
    // This also type-checks the inputs for sanity.  Guaranteed never to
    // be passed a TOP or BOTTOM type, these are filtered out by a pre-check.
    // This call recognizes the multiplicative zero type.
!   virtual const Type *mul_ring(const Type*, const Type*) const = 0;
  
    // Supplied function to return the multiplicative identity type
    virtual const Type *mul_id() const = 0;
  
    // Supplied function to return the additive identity type
*** 73,82 ****
--- 73,83 ----
    virtual int add_opcode() const = 0;
  
    // Supplied function to return the multiplicative opcode
    virtual int mul_opcode() const = 0;
  
+   static MulNode* make(BasicType bt, Node *in1, Node *in2);
  };
  
  //------------------------------MulINode---------------------------------------
  // Multiply 2 integers
  class MulINode : public MulNode {