001/*
002 * Copyright (c) 2009, 2014, 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;
024
025import com.oracle.graal.debug.*;
026import jdk.internal.jvmci.meta.*;
027
028import com.oracle.graal.graph.*;
029import com.oracle.graal.nodeinfo.*;
030import com.oracle.graal.nodes.spi.*;
031
032@NodeInfo(shortName = "Deopt", nameTemplate = "Deopt {p#reason/s}")
033public final class DeoptimizeNode extends AbstractDeoptimizeNode implements Lowerable, LIRLowerable {
034    public static final int DEFAULT_DEBUG_ID = 0;
035
036    public static final NodeClass<DeoptimizeNode> TYPE = NodeClass.create(DeoptimizeNode.class);
037    protected final DeoptimizationAction action;
038    protected final DeoptimizationReason reason;
039    protected final int debugId;
040    protected final JavaConstant speculation;
041
042    public DeoptimizeNode(DeoptimizationAction action, DeoptimizationReason reason) {
043        this(action, reason, DEFAULT_DEBUG_ID, JavaConstant.NULL_POINTER, null);
044    }
045
046    public DeoptimizeNode(DeoptimizationAction action, DeoptimizationReason reason, JavaConstant speculation) {
047        this(action, reason, DEFAULT_DEBUG_ID, speculation, null);
048    }
049
050    public DeoptimizeNode(DeoptimizationAction action, DeoptimizationReason reason, int debugId, JavaConstant speculation, FrameState stateBefore) {
051        super(TYPE, stateBefore);
052        assert action != null;
053        assert reason != null;
054        assert speculation.getKind() == Kind.Object;
055        this.action = action;
056        this.reason = reason;
057        this.debugId = debugId;
058        this.speculation = speculation;
059    }
060
061    public DeoptimizationAction action() {
062        return action;
063    }
064
065    public DeoptimizationReason reason() {
066        return reason;
067    }
068
069    @Override
070    public void lower(LoweringTool tool) {
071        tool.getLowerer().lower(this, tool);
072    }
073
074    @SuppressWarnings("deprecation")
075    public int getDebugId() {
076        int deoptDebugId = debugId;
077        if (deoptDebugId == DEFAULT_DEBUG_ID && (Debug.isDumpEnabledForMethod() || Debug.isLogEnabledForMethod())) {
078            deoptDebugId = this.getId();
079        }
080        return deoptDebugId;
081    }
082
083    @Override
084    public void generate(NodeLIRBuilderTool gen) {
085        gen.getLIRGeneratorTool().emitDeoptimize(gen.getLIRGeneratorTool().getMetaAccess().encodeDeoptActionAndReason(action, reason, getDebugId()), speculation, gen.state(this));
086    }
087
088    @Override
089    public ValueNode getActionAndReason(MetaAccessProvider metaAccess) {
090        return ConstantNode.forConstant(metaAccess.encodeDeoptActionAndReason(action, reason, getDebugId()), metaAccess, graph());
091    }
092
093    @Override
094    public ValueNode getSpeculation(MetaAccessProvider metaAccess) {
095        return ConstantNode.forConstant(speculation, metaAccess, graph());
096    }
097
098    public JavaConstant getSpeculation() {
099        return speculation;
100    }
101
102    @NodeIntrinsic
103    public static native void deopt(@ConstantNodeParameter DeoptimizationAction action, @ConstantNodeParameter DeoptimizationReason reason);
104}