1// Copyright 2013 the V8 project authors. All rights reserved.
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23
24description(
25"Tests what happens when CFG simplification leads to the elimination of a set local that had a type check, and then we branch on the variable not being null while decrementing the variable in the same basic block."
26);
27
28function foo(o) {
29    var x;
30    if (o.f)
31        x = o.g;
32    else
33        x = o.h;
34    var y = x != null;
35    x--;
36    if (y)
37        return y;
38    else
39        return false;
40}
41
42for (var i = 0; i < 500; ++i) {
43    var o = {f:foo};
44    var expected;
45    if (i < 450) {
46        o.g = i;
47        expected = "true";
48    } else {
49        o.g = null;
50        expected = "false";
51    }
52    shouldBe("foo(o)", expected);
53}
54