WriteNode.java revision 12968:4d8a004e5c6d 
1/*
2 * Copyright (c) 2011, 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.memory;
24
25import org.graalvm.compiler.core.common.LIRKind;
26import org.graalvm.compiler.core.common.LocationIdentity;
27import org.graalvm.compiler.core.common.type.Stamp;
28import org.graalvm.compiler.graph.NodeClass;
29import org.graalvm.compiler.nodeinfo.NodeInfo;
30import org.graalvm.compiler.nodes.ValueNode;
31import org.graalvm.compiler.nodes.memory.address.AddressNode;
32import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
33
34/**
35 * Writes a given {@linkplain #value() value} a {@linkplain FixedAccessNode memory location}.
36 */
37@NodeInfo(nameTemplate = "Write#{p#location/s}")
38public class WriteNode extends AbstractWriteNode implements LIRLowerableAccess {
39
40    public static final NodeClass<WriteNode> TYPE = NodeClass.create(WriteNode.class);
41
42    public WriteNode(AddressNode address, LocationIdentity location, ValueNode value, BarrierType barrierType) {
43        super(TYPE, address, location, value, barrierType);
44    }
45
46    protected WriteNode(NodeClass<? extends WriteNode> c, AddressNode address, LocationIdentity location, ValueNode value, BarrierType barrierType) {
47        super(c, address, location, value, barrierType);
48    }
49
50    @Override
51    public void generate(NodeLIRBuilderTool gen) {
52        LIRKind writeKind = gen.getLIRGeneratorTool().getLIRKind(value().stamp());
53        gen.getLIRGeneratorTool().getArithmetic().emitStore(writeKind, gen.operand(address), gen.operand(value()), gen.state(this));
54    }
55
56    @Override
57    public boolean canNullCheck() {
58        return true;
59    }
60
61    @Override
62    public Stamp getAccessStamp() {
63        return value().stamp();
64    }
65}
66