/*+
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 * Copyright 1997-2005 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,+
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 * CA 95054 USA or visit www.sun.com if you need additional information or+
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 * have any questions.+
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 *+
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 */+
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+
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//------------------------------RootNode---------------------------------------+
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// The one-and-only before-all-else and after-all-else RootNode.  The RootNode+
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// represents what happens if the user runs the whole program repeatedly.  The+
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// RootNode produces the initial values of I/O and memory for the program or+
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// procedure start.+
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class RootNode : public LoopNode {+
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public:+
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  RootNode( ) : LoopNode(0,0) {+
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    init_class_id(Class_Root);+
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    del_req(2);+
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    del_req(1);+
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  }+
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  virtual int   Opcode() const;+
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  virtual const Node *is_block_proj() const { return this; }+
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  virtual const Type *bottom_type() const { return Type::BOTTOM; }+
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  virtual Node *Identity( PhaseTransform *phase ) { return this; }+
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  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);+
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  virtual const Type *Value( PhaseTransform *phase ) const { return Type::BOTTOM; }+
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};+
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+
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//------------------------------HaltNode---------------------------------------+
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// Throw an exception & die+
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class HaltNode : public Node {+
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public:+
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  HaltNode( Node *ctrl, Node *frameptr );+
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  virtual int Opcode() const;+
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  virtual bool  pinned() const { return true; };+
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  virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);+
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  virtual const Type *Value( PhaseTransform *phase ) const;+
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  virtual const Type *bottom_type() const;+
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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 Node *is_block_proj() const { return this; }+
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  virtual const RegMask &out_RegMask() const;+
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  virtual uint ideal_reg() const { return NotAMachineReg; }+
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  virtual uint match_edge(uint idx) const { return 0; }+
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};+
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