/* Copyright 1994 - 1996, LongView Technologies L.L.C. $Revision: 1.8 $ */
/* Copyright (c) 2006, Sun Microsystems, Inc.
All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the 
following conditions are met:

    * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following 
	  disclaimer in the documentation and/or other materials provided with the distribution.
    * Neither the name of Sun Microsystems nor the names of its contributors may be used to endorse or promote products derived 
	  from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT 
NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 
THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 
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*/

#ifdef DELTA_COMPILER

// PcDescs map a physical PC (given as offset from start of nmethod) to
// the corresponding source scope and byte code index.

class PcDesc : public ValueObj {
 public:
  int    pc;		// offset from start of method (could be uint16)
  uint16 scope;		// scope index 
  int16  byteCode;	// can be negative (PrologueBCI et al)

  // Constructor (only used for static in nmethod.cpp)
  PcDesc(int pc, uint16 scope, uint16 byteCode);

  // Returns the scope matching this pc desc
  ScopeDesc* containingDesc(const nmethod* nm) const;

  // Returns the real pc
  char* real_pc(const nmethod* nm) const;

  bool equals(const PcDesc* other) const {
    return pc       == other->pc
        && scope    == other->scope
	&& byteCode == other->byteCode;
  }

  bool source_equals(const PcDesc* other) const {
    return scope    == other->scope
        && byteCode == other->byteCode;
  }


  bool is_prologue() const { return byteCode == PrologueBCI; }
  bool is_epilogue() const { return byteCode == EpilogueBCI; }

  void print(nmethod* nm);
  bool verify(nmethod* nm);
};

#endif
