001/*
002 * Copyright (c) 2009, 2015, 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.memory;
024
025import jdk.internal.jvmci.meta.*;
026
027import com.oracle.graal.compiler.common.type.*;
028import com.oracle.graal.graph.*;
029import com.oracle.graal.nodeinfo.*;
030import com.oracle.graal.nodes.*;
031
032/**
033 * Memory {@code PhiNode}s merge memory dependencies at control flow merges.
034 */
035@NodeInfo(nameTemplate = "Phi({i#values}) {p#locationIdentity/s}", allowedUsageTypes = {InputType.Memory})
036public final class MemoryPhiNode extends PhiNode implements MemoryNode {
037
038    public static final NodeClass<MemoryPhiNode> TYPE = NodeClass.create(MemoryPhiNode.class);
039    @Input(InputType.Memory) NodeInputList<ValueNode> values;
040    protected final LocationIdentity locationIdentity;
041
042    public MemoryPhiNode(AbstractMergeNode merge, LocationIdentity locationIdentity) {
043        super(TYPE, StampFactory.forVoid(), merge);
044        this.locationIdentity = locationIdentity;
045        this.values = new NodeInputList<>(this);
046    }
047
048    public MemoryPhiNode(AbstractMergeNode merge, LocationIdentity locationIdentity, ValueNode[] values) {
049        super(TYPE, StampFactory.forVoid(), merge);
050        this.locationIdentity = locationIdentity;
051        this.values = new NodeInputList<>(this, values);
052    }
053
054    public LocationIdentity getLocationIdentity() {
055        return locationIdentity;
056    }
057
058    @Override
059    public NodeInputList<ValueNode> values() {
060        return values;
061    }
062}