FixedValueAnchorNode.java revision 13386:5f8ac59b3d63 
1/*
2 * Copyright (c) 2012, 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 static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_0;
26import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_0;
27
28import org.graalvm.compiler.core.common.type.Stamp;
29import org.graalvm.compiler.graph.NodeClass;
30import org.graalvm.compiler.nodeinfo.NodeInfo;
31import org.graalvm.compiler.nodes.FixedWithNextNode;
32import org.graalvm.compiler.nodes.ValueNode;
33import org.graalvm.compiler.nodes.spi.LIRLowerable;
34import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
35import org.graalvm.compiler.nodes.spi.ValueProxy;
36
37@NodeInfo(cycles = CYCLES_0, size = SIZE_0)
38public class FixedValueAnchorNode extends FixedWithNextNode implements LIRLowerable, ValueProxy, GuardingNode {
39    public static final NodeClass<FixedValueAnchorNode> TYPE = NodeClass.create(FixedValueAnchorNode.class);
40
41    @Input ValueNode object;
42    private Stamp predefinedStamp;
43
44    public ValueNode object() {
45        return object;
46    }
47
48    protected FixedValueAnchorNode(NodeClass<? extends FixedValueAnchorNode> c, ValueNode object) {
49        super(c, object.stamp());
50        this.object = object;
51    }
52
53    public FixedValueAnchorNode(ValueNode object) {
54        this(TYPE, object);
55    }
56
57    public FixedValueAnchorNode(ValueNode object, Stamp predefinedStamp) {
58        super(TYPE, predefinedStamp);
59        this.object = object;
60        this.predefinedStamp = predefinedStamp;
61    }
62
63    @Override
64    public boolean inferStamp() {
65        if (predefinedStamp == null) {
66            return updateStamp(object.stamp());
67        } else {
68            return false;
69        }
70    }
71
72    @NodeIntrinsic
73    public static native Object getObject(Object object);
74
75    @Override
76    public void generate(NodeLIRBuilderTool generator) {
77        generator.setResult(this, generator.operand(object));
78    }
79
80    @Override
81    public ValueNode getOriginalNode() {
82        return object;
83    }
84
85    @Override
86    public GuardingNode getGuard() {
87        return this;
88    }
89
90}
91