/*

 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.

 * Copyright 2009 Red Hat, Inc.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#ifndef SHARE_VM_SHARK_SHARKCONSTANT_HPP

#define SHARE_VM_SHARK_SHARKCONSTANT_HPP

#include "ci/ciStreams.hpp"

#include "memory/allocation.hpp"

#include "shark/sharkBuilder.hpp"

#include "shark/sharkValue.hpp"

class SharkConstant : public ResourceObj {

 public:

  static SharkConstant* for_ldc(ciBytecodeStream* iter);

  static SharkConstant* for_field(ciBytecodeStream* iter);

 private:

  SharkConstant(ciConstant constant, ciType* type);

 private:

  SharkValue* _value;

  ciObject*   _object;

  ciType*     _type;

  bool        _is_loaded;

  bool        _is_nonzero;

  bool        _is_two_word;

 public:

  bool is_loaded() const {

    return _is_loaded;

  }

  bool is_nonzero() const {

    assert(is_loaded(), "should be");

    return _is_nonzero;

  }

  bool is_two_word() const {

    assert(is_loaded(), "should be");

    return _is_two_word;

  }

 public:

  SharkValue* value(SharkBuilder* builder) {

    assert(is_loaded(), "should be");

    if (_value == NULL) {

      _value = SharkValue::create_generic(

        _type, builder->CreateInlineOop(_object), _is_nonzero);

    }

    return _value;

  }

};

#endif // SHARE_VM_SHARK_SHARKCONSTANT_HPP