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      1 // Copyright 2013 the V8 project authors. All rights reserved.
      2 // Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
      3 //
      4 // Redistribution and use in source and binary forms, with or without
      5 // modification, are permitted provided that the following conditions
      6 // are met:
      7 // 1.  Redistributions of source code must retain the above copyright
      8 //     notice, this list of conditions and the following disclaimer.
      9 // 2.  Redistributions in binary form must reproduce the above copyright
     10 //     notice, this list of conditions and the following disclaimer in the
     11 //     documentation and/or other materials provided with the distribution.
     12 //
     13 // THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
     14 // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     15 // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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     22 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     23 
     24 description(
     25 "Tests what happens if we fail to constant fold a LogicalNot that leads into a branch, when the CFA proves that the LogicalNot has a constant value."
     26 );
     27 
     28 function foo1(o) {
     29     if (!!o.thingy)
     30         return o.thingy(42);
     31     else
     32         return o.otherThingy(57);
     33 }
     34 
     35 function foo2(o) {
     36     if (!o.thingy)
     37         return o.otherThingy(42);
     38     else
     39         return o.thingy(57);
     40 }
     41 
     42 function Stuff() {
     43 }
     44 
     45 Stuff.prototype = {
     46     thingy: function(x) { return x + 1; },
     47     otherThingy: function(x) { return x - 1; }
     48 };
     49 
     50 for (var i = 0; i < 1000; ++i) {
     51     shouldBe("foo1(new Stuff())", "43");
     52     shouldBe("foo2(new Stuff())", "58");
     53 }
     54