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The GraalVM compiler and the Graal-truffle optimizer.

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/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * by Oracle in the LICENSE file that accompanied this code.
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 * 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.truffle.phases;

import jdk.graal.compiler.nodes.NodeView;
import jdk.graal.compiler.nodes.StructuredGraph;
import jdk.graal.compiler.nodes.calc.NarrowNode;
import jdk.graal.compiler.nodes.calc.ZeroExtendNode;
import jdk.graal.compiler.phases.BasePhase;
import jdk.graal.compiler.truffle.TruffleTierContext;
import jdk.graal.compiler.truffle.nodes.AnyExtendNode;
import jdk.graal.compiler.truffle.nodes.AnyNarrowNode;

public final class ReplaceAnyExtendNodePhase extends BasePhase {
    @Override
    protected void run(StructuredGraph graph, TruffleTierContext context) {
        // replace all AnyExtendNodes with ZeroExtendNodes
        for (AnyExtendNode node : graph.getNodes(AnyExtendNode.TYPE)) {
            node.replaceAndDelete(graph.addOrUnique(ZeroExtendNode.create(node.getValue(), 64, NodeView.DEFAULT)));
        }
        // replace all AnyNarrowNodes with NarrowNodes
        for (AnyNarrowNode node : graph.getNodes(AnyNarrowNode.TYPE)) {
            node.replaceAndDelete(graph.addOrUnique(NarrowNode.create(node.getValue(), 32, NodeView.DEFAULT)));
        }
    }
}