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package org.graalvm.compiler.replacements.nodes.arithmetic;

import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_4;
import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_4;

import org.graalvm.compiler.core.common.type.IntegerStamp;
import org.graalvm.compiler.core.common.type.Stamp;
import org.graalvm.compiler.graph.NodeClass;
import org.graalvm.compiler.nodeinfo.NodeInfo;
import org.graalvm.compiler.nodes.AbstractBeginNode;
import org.graalvm.compiler.nodes.NodeView;
import org.graalvm.compiler.nodes.ValueNode;
import org.graalvm.compiler.nodes.calc.MulNode;
import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
import org.graalvm.compiler.nodes.spi.SimplifierTool;

import jdk.vm.ci.meta.Value;

@NodeInfo(cycles = CYCLES_4, cyclesRationale = "mul+cmp", size = SIZE_4)
public final class IntegerMulExactSplitNode extends BinaryIntegerExactArithmeticSplitNode {
    public static final NodeClass<IntegerMulExactSplitNode> TYPE = NodeClass.create(IntegerMulExactSplitNode.class);

    public IntegerMulExactSplitNode(Stamp stamp, ValueNode x, ValueNode y, AbstractBeginNode next, AbstractBeginNode overflowSuccessor) {
        super(TYPE, stamp, x, y, next, overflowSuccessor);
    }

    @Override
    protected Value generateArithmetic(NodeLIRBuilderTool gen) {
        return gen.getLIRGeneratorTool().getArithmetic().emitMul(gen.operand(getX()), gen.operand(getY()), true);
    }

    @Override
    public void simplify(SimplifierTool tool) {
        NodeView view = NodeView.from(tool);
        if (!IntegerStamp.multiplicationCanOverflow((IntegerStamp) x.stamp(view), (IntegerStamp) y.stamp(view))) {
            tool.deleteBranch(overflowSuccessor);
            tool.addToWorkList(next);
            MulNode replacement = graph().unique(new MulNode(x, y));
            graph().replaceSplitWithFloating(this, replacement, next);
            tool.addToWorkList(replacement);
        }
    }
}
