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The GraalVM compiler and the Graal-truffle optimizer.
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 * 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.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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).
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package jdk.graal.compiler.nodes;

import jdk.graal.compiler.graph.Node;
import jdk.graal.compiler.graph.NodeClass;
import jdk.graal.compiler.nodes.spi.Canonicalizable;
import jdk.graal.compiler.nodes.spi.CanonicalizerTool;
import jdk.graal.compiler.nodes.spi.LIRLowerable;
import jdk.graal.compiler.nodes.spi.Lowerable;
import jdk.graal.compiler.nodes.spi.NodeLIRBuilderTool;
import jdk.graal.compiler.nodeinfo.NodeInfo;

import jdk.vm.ci.meta.JavaConstant;
import jdk.vm.ci.meta.MetaAccessProvider;

@NodeInfo
public final class DynamicDeoptimizeNode extends AbstractDeoptimizeNode implements LIRLowerable, Lowerable, Canonicalizable {
    public static final NodeClass TYPE = NodeClass.create(DynamicDeoptimizeNode.class);
    @Input ValueNode actionAndReason;
    @Input ValueNode speculation;

    public DynamicDeoptimizeNode(ValueNode actionAndReason, ValueNode speculation) {
        super(TYPE, null);
        this.actionAndReason = actionAndReason;
        this.speculation = speculation;
    }

    public ValueNode getActionAndReason() {
        return actionAndReason;
    }

    public ValueNode getSpeculation() {
        return speculation;
    }

    @Override
    public ValueNode getActionAndReason(MetaAccessProvider metaAccess) {
        return getActionAndReason();
    }

    @Override
    public ValueNode getSpeculation(MetaAccessProvider metaAccess) {
        return getSpeculation();
    }

    @Override
    public void generate(NodeLIRBuilderTool generator) {
        generator.getLIRGeneratorTool().emitDeoptimize(generator.operand(actionAndReason), generator.operand(speculation), generator.state(this));
    }

    @Override
    public Node canonical(CanonicalizerTool tool) {
        if (actionAndReason.isConstant() && speculation.isConstant()) {
            JavaConstant constant = actionAndReason.asJavaConstant();
            JavaConstant speculationConstant = speculation.asJavaConstant();
            DeoptimizeNode newDeopt = new DeoptimizeNode(tool.getMetaAccess().decodeDeoptAction(constant), tool.getMetaAccess().decodeDeoptReason(constant), tool.getMetaAccess().decodeDebugId(
                            constant), tool.getMetaAccess().decodeSpeculation(speculationConstant, graph().getSpeculationLog()), stateBefore());
            return newDeopt;
        }
        return this;
    }
}