1// Copyright 2008 the V8 project authors. All rights reserved. 2// Redistribution and use in source and binary forms, with or without 3// modification, are permitted provided that the following conditions are 4// met: 5// 6// * Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// * Redistributions in binary form must reproduce the above 9// copyright notice, this list of conditions and the following 10// disclaimer in the documentation and/or other materials provided 11// with the distribution. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28function dead1(a, b) { 29 { var x = a + b; } 30 return a; // x is dead 31} 32 33function dead2(a, b) { 34 { var x = a | 0; var y = b | 0; } 35 return a; // x and y are both dead 36} 37 38function dead3(a, b) { 39 { 40 var z; 41 if(a == 2) z = a; 42 else z = b; 43 } 44 return a; // z is dead 45} 46 47function dead4(a) { 48 { 49 var z = 3; 50 for (i = 0; i < 3; i++) { 51 z++; 52 } 53 } 54 return a; // z is dead 55} 56 57function dead5(a) { 58 { 59 var z = 3; 60 for (i = 0; i < 3; i++) { 61 z++; 62 } 63 var w = z + a; 64 } 65 return a; // z and w are dead 66} 67 68assertTrue(dead1(33, 32) == 33); 69assertTrue(dead2(33, 32) == 33); 70assertTrue(dead3(33, 32) == 33); 71assertTrue(dead4(33) == 33); 72assertTrue(dead5(33) == 33); 73 74assertTrue(dead1(34, 7) == 34); 75assertTrue(dead2(34, 7) == 34); 76assertTrue(dead3(34, 7) == 34); 77assertTrue(dead4(34) == 34); 78assertTrue(dead5(34) == 34); 79 80assertTrue(dead1(3.4, 0.1) == 3.4); 81assertTrue(dead2(3.4, 0.1) == 3.4); 82assertTrue(dead3(3.4, 0.1) == 3.4); 83assertTrue(dead4(3.4) == 3.4); 84assertTrue(dead5(3.4) == 3.4); 85