/*+
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 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.+
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.+
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 *+
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 * This code is free software; you can redistribute it and/or modify it+
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 * under the terms of the GNU General Public License version 2 only, as+
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 * published by the Free Software Foundation.+
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 *+
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 * This code is distributed in the hope that it will be useful, but WITHOUT+
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or+
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License+
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 * version 2 for more details (a copy is included in the LICENSE file that+
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 * accompanied this code).+
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 *+
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 * You should have received a copy of the GNU General Public License version+
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 * 2 along with this work; if not, write to the Free Software Foundation,+
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.+
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 *+
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA+
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 * or visit www.oracle.com if you need additional information or have any+
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 * questions.+
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 *+
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 */+
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+
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#ifndef SHARE_VM_OPTO_MULTNODE_HPP+
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#define SHARE_VM_OPTO_MULTNODE_HPP+
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+
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#include "opto/node.hpp"+
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+
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class Matcher;+
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class ProjNode;+
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+
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//------------------------------MultiNode--------------------------------------+
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// This class defines a MultiNode, a Node which produces many values.  The+
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// values are wrapped up in a tuple Type, i.e. a TypeTuple.+
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class MultiNode : public Node {+
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public:+
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  MultiNode( uint required ) : Node(required) {+
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    init_class_id(Class_Multi);+
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  }+
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  virtual int Opcode() const;+
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  virtual const Type *bottom_type() const = 0;+
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  virtual bool       is_CFG() const { return true; }+
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  virtual uint hash() const { return NO_HASH; }  // CFG nodes do not hash+
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  virtual bool depends_only_on_test() const { return false; }+
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  virtual const RegMask &out_RegMask() const;+
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  virtual Node *match( const ProjNode *proj, const Matcher *m );+
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  virtual uint ideal_reg() const { return NotAMachineReg; }+
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  ProjNode* proj_out(uint which_proj) const; // Get a named projection+
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+
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};+
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+
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//------------------------------ProjNode---------------------------------------+
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// This class defines a Projection node.  Projections project a single element+
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// out of a tuple (or Signature) type.  Only MultiNodes produce TypeTuple+
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// results.+
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class ProjNode : public Node {+
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protected:+
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  virtual uint hash() const;+
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  virtual uint cmp( const Node &n ) const;+
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  virtual uint size_of() const;+
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  void check_con() const;       // Called from constructor.+
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  const Type* proj_type(const Type* t) const;+
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+
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public:+
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  ProjNode( Node *src, uint con, bool io_use = false )+
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    : Node( src ), _con(con), _is_io_use(io_use)+
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  {+
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    init_class_id(Class_Proj);+
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    // Optimistic setting. Need additional checks in Node::is_dead_loop_safe().+
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    if (con != TypeFunc::Memory || src->is_Start())+
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      init_flags(Flag_is_dead_loop_safe);+
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    debug_only(check_con());+
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  }+
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  const uint _con;              // The field in the tuple we are projecting+
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  const bool _is_io_use;        // Used to distinguish between the projections+
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                                // used on the control and io paths from a macro node+
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  virtual int Opcode() const;+
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  virtual bool      is_CFG() const;+
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  virtual bool depends_only_on_test() const { return false; }+
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  virtual const Type *bottom_type() const;+
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  virtual const TypePtr *adr_type() const;+
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  virtual bool pinned() const;+
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  virtual const Type *Value( PhaseTransform *phase ) const;+
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  virtual uint ideal_reg() const;+
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  virtual const RegMask &out_RegMask() const;+
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+
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#ifndef PRODUCT+
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  virtual void dump_spec(outputStream *st) const;+
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#endif+
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};+
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+
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#endif // SHARE_VM_OPTO_MULTNODE_HPP+
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