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 DFG silent spill and fill of WeakJSConstants does not result in nonsense." 26 ); 27 28 function foo(a, b, c, d) 29 { 30 a.f = 42; // WeakJSConstants corresponding to the o.f transition get created here. 31 var x = !d; // Silent spilling and filling happens here. 32 b.f = x; // The WeakJSConstants get reused here. 33 var y = !d; // Silent spilling and filling happens here. 34 c.f = y; // The WeakJSConstants get reused here. 35 } 36 37 var Empty = ""; 38 39 for (var i = 0; i < 1000; ++i) { 40 var o1 = new Object(); 41 var o2 = new Object(); 42 var o3 = new Object(); 43 eval(Empty + "foo(o1, o2, o3, \"stuff\")"); 44 shouldBe("o1.f", "42"); 45 shouldBe("o2.f", "false"); 46 shouldBe("o3.f", "false"); 47 } 48 49
