This reproducer generates wrong results on x86.
```
import jdk.incubator.vector.ByteVector;
import jdk.incubator.vector.VectorSpecies;

import java.util.Arrays;

public class Test {

        static final VectorSpecies<Byte> SPECIES_256 = ByteVector.SPECIES_256;
        static final VectorSpecies<Byte> SPECIES_128 = ByteVector.SPECIES_128;

        static byte[] a = new byte[32];
        static byte[] b = new byte[32];

        private static void func() {
                ByteVector av = ByteVector.fromArray(SPECIES_256, a, 0);
                ByteVector bv = (ByteVector)av.reinterpretShape(SPECIES_128, 0).reinterpretShape(SPECIES_256, 0);
                bv.intoArray(b, 0);
        }

        public static void main(String[] args) {
                for (int i = 0; i < a.length; i++) {
                    a[i] = (byte)i;
                }
                for (int i = 0; i < 100000; i++) {
                        func();
                }
                System.out.println("a: " + Arrays.toString(a));
                System.out.println("b: " + Arrays.toString(b));
        }
}
```

Output:
```
a: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31]
b: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31]
```

Expected:
```
a: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31]
b: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
```