001/*
002 * Copyright (c) 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.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.spi.*;
030import com.oracle.graal.nodes.util.*;
031
032@NodeInfo
033public final class EnsureVirtualizedNode extends FixedWithNextNode implements Virtualizable, Lowerable {
034
035    public static final NodeClass<EnsureVirtualizedNode> TYPE = NodeClass.create(EnsureVirtualizedNode.class);
036
037    @Input ValueNode object;
038    private final boolean localOnly;
039
040    public EnsureVirtualizedNode(ValueNode object, boolean localOnly) {
041        super(TYPE, StampFactory.forVoid());
042        this.object = object;
043        this.localOnly = localOnly;
044    }
045
046    public void virtualize(VirtualizerTool tool) {
047        ValueNode alias = tool.getAlias(object);
048        if (alias instanceof VirtualObjectNode) {
049            VirtualObjectNode virtual = (VirtualObjectNode) alias;
050            if (virtual instanceof VirtualBoxingNode) {
051                Throwable exception = new VerificationError("ensureVirtual is not valid for boxing objects: %s", virtual.type().getName());
052                throw GraphUtil.approxSourceException(this, exception);
053            }
054            if (!localOnly) {
055                tool.setEnsureVirtualized(virtual, true);
056            }
057            tool.delete();
058        }
059    }
060
061    public void lower(LoweringTool tool) {
062        ensureVirtualFailure(this, object.stamp());
063    }
064
065    public static void ensureVirtualFailure(Node location, Stamp stamp) {
066        Throwable exception = new VerificationError("Object should not be materialized (stamp=%s):", stamp);
067        throw GraphUtil.approxSourceException(location, exception);
068    }
069}