1/*
2 * Copyright (c) 2011, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23package org.graalvm.compiler.nodes.virtual;
24
25import org.graalvm.compiler.graph.NodeClass;
26import org.graalvm.compiler.nodeinfo.NodeInfo;
27import org.graalvm.compiler.nodeinfo.Verbosity;
28import org.graalvm.compiler.nodes.FixedNode;
29import org.graalvm.compiler.nodes.ValueNode;
30
31import jdk.vm.ci.meta.JavaKind;
32import jdk.vm.ci.meta.ResolvedJavaField;
33import jdk.vm.ci.meta.ResolvedJavaType;
34
35@NodeInfo(nameTemplate = "VirtualInstance {p#type/s}")
36public class VirtualInstanceNode extends VirtualObjectNode {
37
38    public static final NodeClass<VirtualInstanceNode> TYPE = NodeClass.create(VirtualInstanceNode.class);
39    protected final ResolvedJavaType type;
40    protected final ResolvedJavaField[] fields;
41
42    public VirtualInstanceNode(ResolvedJavaType type, boolean hasIdentity) {
43        this(type, type.getInstanceFields(true), hasIdentity);
44    }
45
46    public VirtualInstanceNode(ResolvedJavaType type, ResolvedJavaField[] fields, boolean hasIdentity) {
47        this(TYPE, type, fields, hasIdentity);
48    }
49
50    protected VirtualInstanceNode(NodeClass<? extends VirtualInstanceNode> c, ResolvedJavaType type, boolean hasIdentity) {
51        this(c, type, type.getInstanceFields(true), hasIdentity);
52    }
53
54    protected VirtualInstanceNode(NodeClass<? extends VirtualInstanceNode> c, ResolvedJavaType type, ResolvedJavaField[] fields, boolean hasIdentity) {
55        super(c, type, hasIdentity);
56        this.type = type;
57        this.fields = fields;
58    }
59
60    @Override
61    public ResolvedJavaType type() {
62        return type;
63    }
64
65    @Override
66    public int entryCount() {
67        return fields.length;
68    }
69
70    public ResolvedJavaField field(int index) {
71        return fields[index];
72    }
73
74    public ResolvedJavaField[] getFields() {
75        return fields;
76    }
77
78    @Override
79    public String toString(Verbosity verbosity) {
80        if (verbosity == Verbosity.Name) {
81            return super.toString(Verbosity.Name) + " " + type.toJavaName(false);
82        } else {
83            return super.toString(verbosity);
84        }
85    }
86
87    @Override
88    public String entryName(int index) {
89        return fields[index].getName();
90    }
91
92    public int fieldIndex(ResolvedJavaField field) {
93        // on average fields.length == ~6, so a linear search is fast enough
94        for (int i = 0; i < fields.length; i++) {
95            if (fields[i].equals(field)) {
96                return i;
97            }
98        }
99        return -1;
100    }
101
102    @Override
103    public int entryIndexForOffset(long constantOffset, JavaKind expectedEntryKind) {
104        return fieldIndex(type.findInstanceFieldWithOffset(constantOffset, expectedEntryKind));
105    }
106
107    @Override
108    public JavaKind entryKind(int index) {
109        assert index >= 0 && index < fields.length;
110        return fields[index].getJavaKind();
111    }
112
113    @Override
114    public VirtualInstanceNode duplicate() {
115        return new VirtualInstanceNode(type, fields, super.hasIdentity());
116    }
117
118    @Override
119    public ValueNode getMaterializedRepresentation(FixedNode fixed, ValueNode[] entries, LockState locks) {
120        return new AllocatedObjectNode(this);
121    }
122}
123