for (var i = 0; i < 20000000; ++i) {
    var result = i;
    result |= i | 1;
    result |= i | 2;
    result |= i | 3;
    result |= i | 4;
    result |= i | 5;
    result |= i | 6;
    result |= i | 7;
    if (result !== (i | 7))
        throw "Error: bad result at iteration " + i + " : " + result;

}