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 an Int32ToDouble placed on a SetLocal does a forward exit, and works right even when the relevant variable is actually predicted numeric." 26 ); 27 28 var counter = 0; 29 30 function checkpoint(text) { 31 debug("Checkpoint: " + text); 32 counter++; 33 } 34 35 function func1() { 36 checkpoint("a"); 37 a = Date.now() + Date.now() + Date.now() + Date.now() + Date.now() + Date.now(); 38 checkpoint("b"); 39 if (counter < 1100) 40 return 0; 41 } 42 function func2() { 43 checkpoint("c"); 44 return Date.now() + Date.now() + Date.now() + Date.now() + Date.now() + Date.now(); 45 } 46 47 function func3(s) { 48 checkpoint("1"); 49 s = func1(); // The bug is that this function will be called twice, if our Int32ToDouble hoisting does a backward speculation. 50 checkpoint("2"); 51 s = func2(); 52 checkpoint("3"); 53 return s; 54 } 55 56 function test() { 57 return func3(1); 58 } 59 60 61 for (var i=0; i < 200; i++) { 62 test(); 63 } 64 65 shouldBe("counter", "1200"); 66
