001/*
002 * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation.
008 *
009 * This code is distributed in the hope that it will be useful, but WITHOUT
010 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
011 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
012 * version 2 for more details (a copy is included in the LICENSE file that
013 * accompanied this code).
014 *
015 * You should have received a copy of the GNU General Public License version
016 * 2 along with this work; if not, write to the Free Software Foundation,
017 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
018 *
019 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
020 * or visit www.oracle.com if you need additional information or have any
021 * questions.
022 */
023package com.oracle.graal.nodes.virtual;
024
025import com.oracle.graal.compiler.common.type.*;
026import com.oracle.graal.graph.*;
027import com.oracle.graal.nodeinfo.*;
028import com.oracle.graal.nodes.*;
029import com.oracle.graal.nodes.calc.*;
030import com.oracle.graal.nodes.spi.*;
031
032/**
033 * Selects one object from a {@link CommitAllocationNode}. The object is identified by its
034 * {@link VirtualObjectNode}.
035 */
036@NodeInfo
037public final class AllocatedObjectNode extends FloatingNode implements Virtualizable, ArrayLengthProvider {
038
039    public static final NodeClass<AllocatedObjectNode> TYPE = NodeClass.create(AllocatedObjectNode.class);
040    @Input VirtualObjectNode virtualObject;
041    @Input(InputType.Extension) CommitAllocationNode commit;
042
043    public AllocatedObjectNode(VirtualObjectNode virtualObject) {
044        super(TYPE, StampFactory.exactNonNull(virtualObject.type()));
045        this.virtualObject = virtualObject;
046    }
047
048    public VirtualObjectNode getVirtualObject() {
049        return virtualObject;
050    }
051
052    public CommitAllocationNode getCommit() {
053        return commit;
054    }
055
056    public void setCommit(CommitAllocationNode x) {
057        updateUsages(commit, x);
058        commit = x;
059    }
060
061    @Override
062    public void virtualize(VirtualizerTool tool) {
063        tool.replaceWithVirtual(getVirtualObject());
064    }
065
066    public ValueNode length() {
067        if (virtualObject instanceof ArrayLengthProvider) {
068            return ((ArrayLengthProvider) virtualObject).length();
069        }
070        return null;
071    }
072}