Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 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 |
| 16 | // DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| 17 | // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 18 | // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 19 | // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| 20 | // ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 21 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 22 | // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 23 | |
| 24 | description( |
| 25 | "Tests that we do the right things when we prove that we can eliminate a structure check, but haven't proved that the value is definitely an object - i.e. we've proved that it's either an object with a specific structure, or it's not an object at all." |
| 26 | ); |
| 27 | |
| 28 | function foo(o, p) { |
| 29 | var x = o.f; |
| 30 | if (p) |
| 31 | o = null; |
| 32 | return x + o.g(); |
| 33 | } |
| 34 | |
| 35 | function bar() { |
| 36 | return 24; |
| 37 | } |
| 38 | |
| 39 | function baz(i) { |
| 40 | try { |
| 41 | return foo({f:42, g:bar}, i == 190); |
| 42 | } catch (e) { |
| 43 | debug("Caught exception: " + e); |
| 44 | return "ERROR"; |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | for (var i = 0; i < 200; ++i) |
| 49 | shouldBe("baz(i)", i == 190 ? "\"ERROR\"" : "66"); |