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23
24description(
25"Tests that if we have a tower of large numerical constants being added to each other, the DFG knows that a sufficiently large tower may produce a large enough value that overflow check elimination must be careful."
26);
27
28function foo(a, b) {
29    return (a + b + 281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 +
30            281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 +
31            281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 +
32            281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 +
33            281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 +
34            281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 +
35            281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 +
36            281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 + 30) | 0;
37}
38
39function bar(a, b, o) {
40    eval(""); // Prevent this function from being opt compiled.
41    return foo(a, b, o);
42}
43
44var warmup = 200;
45
46for (var i = 0; i < warmup + 1; ++i) {
47    var a, b, c;
48    var expected;
49    if (i < warmup) {
50        a = 1;
51        b = 2;
52        expected = 0;
53    } else {
54        a = 2147483645;
55        b = 2147483644;
56        expected = -10;
57    }
58    shouldBe("bar(" + a + ", " + b + ")", "" + expected);
59}
60