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23
24description(
25"Tests that when values predicted but not proven int are used in a tower of additions, we don't eliminate the overflow check unsoundly."
26);
27
28function foo(a, b, o) {
29    return (a + b + o.f) | 0;
30}
31
32function bar(a, b, o) {
33    eval(""); // Prevent this function from being opt compiled.
34    return foo(a, b, o);
35}
36
37var badCases = [
38    {a:2147483645, b:2147483644, c:9007199254740990, expected:-8},
39    {a:2147483643, b:2147483643, c:18014398509481980, expected:-16},
40    {a:2147483643, b:2147483642, c:36028797018963960, expected:-16},
41    {a:2147483642, b:2147483642, c:36028797018963960, expected:-16},
42    {a:2147483641, b:2147483640, c:144115188075855840, expected:-32},
43    {a:2147483640, b:2147483640, c:144115188075855840, expected:-64},
44    {a:2147483640, b:2147483639, c:288230376151711680, expected:-64},
45    {a:2147483639, b:2147483639, c:288230376151711680, expected:-64}
46];
47
48var warmup = 100;
49
50for (var i = 0; i < warmup + badCases.length; ++i) {
51    var a, b, c;
52    var expected;
53    if (i < warmup) {
54        a = 1;
55        b = 2;
56        c = 3;
57        expected = 6;
58    } else {
59        var current = badCases[i - warmup];
60        a = current.a;
61        b = current.b;
62        c = current.c;
63        expected = current.expected;
64    }
65    shouldBe("bar(" + a + ", " + b + ", {f:" + c + "})", "" + expected);
66}
67