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/**
 * @test
 * @bug 8359121
 * @summary Region node introduced by ArraysSupport.mismatch must be disconnected,
 *          and not just put aside as dead: when simplifying
 *          Proj -> Region -> If -> ...
 *          into
 *          Proj -> If -> ...
 *               -> Region
 *          the dead Region node must be removed from Proj's outputs.
 * @modules java.base/jdk.internal.util
 * @run main/othervm -Xcomp
 *                   -XX:CompileCommand=compileonly,compiler.igvn.RemoveDeadRegionFromVectorizedMismatchIntrinsic::test
 *                   compiler.igvn.RemoveDeadRegionFromVectorizedMismatchIntrinsic
 * @run main compiler.igvn.RemoveDeadRegionFromVectorizedMismatchIntrinsic
 */
package compiler.igvn;

import jdk.internal.util.ArraysSupport;

public class RemoveDeadRegionFromVectorizedMismatchIntrinsic {
    public static void main(String[] args) {
        ArraysSupport.mismatch(new int[0], new int[0], 0);  // loads ArraysSupport
        test(new byte[0], new byte[0]);
    }

    public static int test(byte[] a, byte[] b) {
        int i = ArraysSupport.vectorizedMismatch(a, 0, b, 0, 0, 0);
        return i >= 0 ? i : 0;
    }
}