/*

 * Copyright (c) 2009, 2015, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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package org.graalvm.compiler.nodes;

import org.graalvm.compiler.debug.DebugContext;

import org.graalvm.compiler.graph.NodeClass;

import org.graalvm.compiler.lir.gen.LIRGeneratorTool;

import org.graalvm.compiler.nodeinfo.NodeInfo;

import org.graalvm.compiler.nodes.spi.LIRLowerable;

import org.graalvm.compiler.nodes.spi.Lowerable;

import org.graalvm.compiler.nodes.spi.LoweringTool;

import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;

import jdk.vm.ci.meta.DeoptimizationAction;

import jdk.vm.ci.meta.DeoptimizationReason;

import jdk.vm.ci.meta.JavaConstant;

import jdk.vm.ci.meta.JavaKind;

import jdk.vm.ci.meta.MetaAccessProvider;

import jdk.vm.ci.meta.Value;

@NodeInfo(shortName = "Deopt", nameTemplate = "Deopt {p#reason/s}")

    public static final int DEFAULT_DEBUG_ID = 0;

    public static final NodeClass<DeoptimizeNode> TYPE = NodeClass.create(DeoptimizeNode.class);

    protected final DeoptimizationAction action;

    protected final DeoptimizationReason reason;

    protected int debugId;

    protected final JavaConstant speculation;

    public DeoptimizeNode(DeoptimizationAction action, DeoptimizationReason reason) {

        this(action, reason, DEFAULT_DEBUG_ID, JavaConstant.NULL_POINTER, null);

    }

    public DeoptimizeNode(DeoptimizationAction action, DeoptimizationReason reason, JavaConstant speculation) {

        this(action, reason, DEFAULT_DEBUG_ID, speculation, null);

    }

    public DeoptimizeNode(DeoptimizationAction action, DeoptimizationReason reason, int debugId, JavaConstant speculation, FrameState stateBefore) {

        super(TYPE, stateBefore);

        assert action != null;

        assert reason != null;

        assert speculation.getJavaKind() == JavaKind.Object;

        this.action = action;

        this.reason = reason;

        this.debugId = debugId;

        this.speculation = speculation;

    }

        return action;

    }

        return reason;

    }

    @Override

    public void lower(LoweringTool tool) {

        tool.getLowerer().lower(this, tool);

    }

    @SuppressWarnings("deprecation")

    public int getDebugId() {

        int deoptDebugId = debugId;

        if (deoptDebugId == DEFAULT_DEBUG_ID) {

            DebugContext debug = getDebug();

            if ((debug.isDumpEnabledForMethod() || debug.isLogEnabledForMethod())) {

                deoptDebugId = this.getId();

            }

        }

        return deoptDebugId;

    }

    public void setDebugId(int debugId) {

        assert debugId != DEFAULT_DEBUG_ID;

        this.debugId = debugId;

    }

    @Override

    public void generate(NodeLIRBuilderTool gen) {

        LIRGeneratorTool tool = gen.getLIRGeneratorTool();

        Value actionAndReason = tool.emitJavaConstant(tool.getMetaAccess().encodeDeoptActionAndReason(action, reason, getDebugId()));

        Value speculationValue = tool.emitJavaConstant(speculation);

        gen.getLIRGeneratorTool().emitDeoptimize(actionAndReason, speculationValue, gen.state(this));

    }

    @Override

    public ValueNode getActionAndReason(MetaAccessProvider metaAccess) {

        return ConstantNode.forConstant(metaAccess.encodeDeoptActionAndReason(action, reason, getDebugId()), metaAccess, graph());

    }

    @Override

    public ValueNode getSpeculation(MetaAccessProvider metaAccess) {

        return ConstantNode.forConstant(speculation, metaAccess, graph());

    }

    public JavaConstant getSpeculation() {

        return speculation;

    }

    @NodeIntrinsic

    public static native void deopt(@ConstantNodeParameter DeoptimizationAction action, @ConstantNodeParameter DeoptimizationReason reason);

}