JavaWriteNode.java revision 12651:6ef01bd40ce2 
1/*
2 * Copyright (c) 2014, 2016, 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.extended;
24
25import org.graalvm.compiler.core.common.LocationIdentity;
26import org.graalvm.compiler.graph.NodeClass;
27import org.graalvm.compiler.nodeinfo.NodeInfo;
28import org.graalvm.compiler.nodes.StateSplit;
29import org.graalvm.compiler.nodes.ValueNode;
30import org.graalvm.compiler.nodes.memory.AbstractWriteNode;
31import org.graalvm.compiler.nodes.memory.MemoryAccess;
32import org.graalvm.compiler.nodes.memory.MemoryCheckpoint;
33import org.graalvm.compiler.nodes.memory.address.AddressNode;
34import org.graalvm.compiler.nodes.spi.Lowerable;
35import org.graalvm.compiler.nodes.spi.LoweringTool;
36
37import jdk.vm.ci.meta.JavaKind;
38
39/**
40 * Write a raw memory location according to Java field or array write semantics. It will perform
41 * write barriers, implicit conversions and optionally oop compression.
42 */
43@NodeInfo(nameTemplate = "JavaWrite#{p#location/s}")
44public final class JavaWriteNode extends AbstractWriteNode implements Lowerable, StateSplit, MemoryAccess, MemoryCheckpoint.Single {
45
46    public static final NodeClass<JavaWriteNode> TYPE = NodeClass.create(JavaWriteNode.class);
47    protected final JavaKind writeKind;
48    protected final boolean compressible;
49
50    public JavaWriteNode(JavaKind writeKind, AddressNode address, LocationIdentity location, ValueNode value, BarrierType barrierType, boolean compressible, boolean initialization) {
51        super(TYPE, address, location, value, barrierType, initialization);
52        this.writeKind = writeKind;
53        this.compressible = compressible;
54    }
55
56    @Override
57    public void lower(LoweringTool tool) {
58        tool.getLowerer().lower(this, tool);
59    }
60
61    @Override
62    public boolean canNullCheck() {
63        return true;
64    }
65
66    public JavaKind getWriteKind() {
67        return writeKind;
68    }
69
70    public boolean isCompressible() {
71        return compressible;
72    }
73}
74