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23
24description(
25"Tests that the DFG CFA is not overzealous in removing prototype structure checks for put_by_id transitions."
26);
27
28function foo(a, b)
29{
30    a.f = b;
31}
32
33var Empty = "";
34
35function Foo() {
36}
37
38var stuff;
39
40for (var i = 0; i < 1000; ++i) {
41    if (i >= 900)
42        Foo.prototype.__defineSetter__("f", function(value) { stuff = value; });
43
44    var o = new Foo();
45    eval(Empty + "foo(o, i)");
46    if (i >= 900) {
47        shouldBe("stuff", "" + i);
48        shouldBe("o.f", "" + (void 0));
49    } else
50        shouldBe("o.f", "" + i);
51}
52