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

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 * 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,

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package org.graalvm.compiler.nodes.calc;

import org.graalvm.compiler.core.common.type.ArithmeticOpTable;

import org.graalvm.compiler.core.common.type.ArithmeticOpTable.BinaryOp;

import org.graalvm.compiler.core.common.type.ArithmeticOpTable.BinaryOp.Or;

import org.graalvm.compiler.core.common.type.PrimitiveStamp;

import org.graalvm.compiler.core.common.type.Stamp;

import org.graalvm.compiler.graph.NodeClass;

import org.graalvm.compiler.graph.spi.Canonicalizable.BinaryCommutative;

import org.graalvm.compiler.graph.spi.CanonicalizerTool;

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

import org.graalvm.compiler.nodeinfo.NodeInfo;

import org.graalvm.compiler.nodes.ConstantNode;

import org.graalvm.compiler.nodes.NodeView;

import org.graalvm.compiler.nodes.ValueNode;

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

import org.graalvm.compiler.nodes.util.GraphUtil;

import jdk.vm.ci.code.CodeUtil;

import jdk.vm.ci.meta.Constant;

import jdk.vm.ci.meta.PrimitiveConstant;

@NodeInfo(shortName = "|")

public final class OrNode extends BinaryArithmeticNode<Or> implements BinaryCommutative<ValueNode>, NarrowableArithmeticNode {

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

    public OrNode(ValueNode x, ValueNode y) {

    }

    public static ValueNode create(ValueNode x, ValueNode y, NodeView view) {

        BinaryOp<Or> op = ArithmeticOpTable.forStamp(x.stamp(view)).getOr();

        Stamp stamp = op.foldStamp(x.stamp(view), y.stamp(view));

        ConstantNode tryConstantFold = tryConstantFold(op, x, y, stamp, view);

        if (tryConstantFold != null) {

            return tryConstantFold;

        }

        return canonical(null, op, stamp, x, y, view);

    }

    @Override

    public ValueNode canonical(CanonicalizerTool tool, ValueNode forX, ValueNode forY) {

        NodeView view = NodeView.from(tool);

        ValueNode ret = super.canonical(tool, forX, forY);

        if (ret != this) {

            return ret;

        }

        return canonical(this, getOp(forX, forY), stamp(view), forX, forY, view);

    }

    private static ValueNode canonical(OrNode self, BinaryOp<Or> op, Stamp stamp, ValueNode forX, ValueNode forY, NodeView view) {

        if (GraphUtil.unproxify(forX) == GraphUtil.unproxify(forY)) {

            return forX;

        }

        if (forX.isConstant() && !forY.isConstant()) {

            return new OrNode(forY, forX);

        }

        if (forY.isConstant()) {

            Constant c = forY.asConstant();

            if (op.isNeutral(c)) {

                return forX;

            }

            if (c instanceof PrimitiveConstant && ((PrimitiveConstant) c).getJavaKind().isNumericInteger()) {

                long rawY = ((PrimitiveConstant) c).asLong();

                long mask = CodeUtil.mask(PrimitiveStamp.getBits(stamp));

                if ((rawY & mask) == mask) {

                    return ConstantNode.forIntegerStamp(stamp, mask);

                }

            }

            return reassociate(self != null ? self : (OrNode) new OrNode(forX, forY).maybeCommuteInputs(), ValueNode.isConstantPredicate(), forX, forY, view);

        }

        if (forX instanceof NotNode && forY instanceof NotNode) {

            return new NotNode(AndNode.create(((NotNode) forX).getValue(), ((NotNode) forY).getValue(), view));

        }

        return self != null ? self : new OrNode(forX, forY).maybeCommuteInputs();

    }

    @Override

    public void generate(NodeLIRBuilderTool nodeValueMap, ArithmeticLIRGeneratorTool gen) {

        nodeValueMap.setResult(this, gen.emitOr(nodeValueMap.operand(getX()), nodeValueMap.operand(getY())));

    }

}