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src/share/vm/opto/multnode.hpp

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  27 
  28 #include "opto/node.hpp"
  29 
  30 class Matcher;
  31 class ProjNode;
  32 
  33 //------------------------------MultiNode--------------------------------------
  34 // This class defines a MultiNode, a Node which produces many values.  The
  35 // values are wrapped up in a tuple Type, i.e. a TypeTuple.
  36 class MultiNode : public Node {
  37 public:
  38   MultiNode( uint required ) : Node(required) {
  39     init_class_id(Class_Multi);
  40   }
  41   virtual int Opcode() const;
  42   virtual const Type *bottom_type() const = 0;
  43   virtual bool       is_CFG() const { return true; }
  44   virtual uint hash() const { return NO_HASH; }  // CFG nodes do not hash
  45   virtual bool depends_only_on_test() const { return false; }
  46   virtual const RegMask &out_RegMask() const;
  47   virtual Node *match( const ProjNode *proj, const Matcher *m );
  48   virtual uint ideal_reg() const { return NotAMachineReg; }
  49   ProjNode* proj_out(uint which_proj) const; // Get a named projection
  50 
  51 };
  52 
  53 //------------------------------ProjNode---------------------------------------
  54 // This class defines a Projection node.  Projections project a single element
  55 // out of a tuple (or Signature) type.  Only MultiNodes produce TypeTuple
  56 // results.
  57 class ProjNode : public Node {
  58 protected:
  59   virtual uint hash() const;
  60   virtual uint cmp( const Node &n ) const;
  61   virtual uint size_of() const;
  62   void check_con() const;       // Called from constructor.
  63   const Type* proj_type(const Type* t) const;
  64 
  65 public:
  66   ProjNode( Node *src, uint con, bool io_use = false )
  67     : Node( src ), _con(con), _is_io_use(io_use)




  27 
  28 #include "opto/node.hpp"
  29 
  30 class Matcher;
  31 class ProjNode;
  32 
  33 //------------------------------MultiNode--------------------------------------
  34 // This class defines a MultiNode, a Node which produces many values.  The
  35 // values are wrapped up in a tuple Type, i.e. a TypeTuple.
  36 class MultiNode : public Node {
  37 public:
  38   MultiNode( uint required ) : Node(required) {
  39     init_class_id(Class_Multi);
  40   }
  41   virtual int Opcode() const;
  42   virtual const Type *bottom_type() const = 0;
  43   virtual bool       is_CFG() const { return true; }
  44   virtual uint hash() const { return NO_HASH; }  // CFG nodes do not hash
  45   virtual bool depends_only_on_test() const { return false; }
  46   virtual const RegMask &out_RegMask() const;
  47   virtual Node *match(const ProjNode *proj, const Matcher *m, const RegMask* mask);
  48   virtual uint ideal_reg() const { return NotAMachineReg; }
  49   ProjNode* proj_out(uint which_proj) const; // Get a named projection
  50 
  51 };
  52 
  53 //------------------------------ProjNode---------------------------------------
  54 // This class defines a Projection node.  Projections project a single element
  55 // out of a tuple (or Signature) type.  Only MultiNodes produce TypeTuple
  56 // results.
  57 class ProjNode : public Node {
  58 protected:
  59   virtual uint hash() const;
  60   virtual uint cmp( const Node &n ) const;
  61   virtual uint size_of() const;
  62   void check_con() const;       // Called from constructor.
  63   const Type* proj_type(const Type* t) const;
  64 
  65 public:
  66   ProjNode( Node *src, uint con, bool io_use = false )
  67     : Node( src ), _con(con), _is_io_use(io_use)


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