sharkConstant.hpp revision 1879:f95d63e2154a 
1/*
2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2009 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26#ifndef SHARE_VM_SHARK_SHARKCONSTANT_HPP
27#define SHARE_VM_SHARK_SHARKCONSTANT_HPP
28
29#include "ci/ciStreams.hpp"
30#include "memory/allocation.hpp"
31#include "shark/sharkBuilder.hpp"
32#include "shark/sharkValue.hpp"
33
34class SharkConstant : public ResourceObj {
35 public:
36  static SharkConstant* for_ldc(ciBytecodeStream* iter);
37  static SharkConstant* for_field(ciBytecodeStream* iter);
38
39 private:
40  SharkConstant(ciConstant constant, ciType* type);
41
42 private:
43  SharkValue* _value;
44  ciObject*   _object;
45  ciType*     _type;
46  bool        _is_loaded;
47  bool        _is_nonzero;
48  bool        _is_two_word;
49
50 public:
51  bool is_loaded() const {
52    return _is_loaded;
53  }
54  bool is_nonzero() const {
55    assert(is_loaded(), "should be");
56    return _is_nonzero;
57  }
58  bool is_two_word() const {
59    assert(is_loaded(), "should be");
60    return _is_two_word;
61  }
62
63 public:
64  SharkValue* value(SharkBuilder* builder) {
65    assert(is_loaded(), "should be");
66    if (_value == NULL) {
67      _value = SharkValue::create_generic(
68        _type, builder->CreateInlineOop(_object), _is_nonzero);
69    }
70    return _value;
71  }
72};
73
74#endif // SHARE_VM_SHARK_SHARKCONSTANT_HPP
75