uniform half4 colorRed, colorGreen;

bool test() {
    const int x [3] = int[3](1, 2, 3);
    const int xx[3] = int[3](1, 2, 3);
    const int y [3] = int[3](1, 2, 4);

    return (x == xx) && !(x != xx) && (x != y) && !(x == y);
}

half4 main(float2 coords) {
    return test() ? colorGreen : colorRed;
}