1a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Copyright 2008 the V8 project authors. All rights reserved. 2a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Redistribution and use in source and binary forms, with or without 3a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// modification, are permitted provided that the following conditions are 4a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// met: 5a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// 6a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Redistributions of source code must retain the above copyright 7a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// notice, this list of conditions and the following disclaimer. 8a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Redistributions in binary form must reproduce the above 9a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// copyright notice, this list of conditions and the following 10a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// disclaimer in the documentation and/or other materials provided 11a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// with the distribution. 12a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Neither the name of Google Inc. nor the names of its 13a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// contributors may be used to endorse or promote products derived 14a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// from this software without specific prior written permission. 15a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// 16a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 28b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochfunction dead1(a, b) { 29b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch a * b; 30b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch a << b; 31b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch a >> b; 32b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch a >>> b; 33b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch a | b; 34b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch a & b; 35b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch a ^ b; 36b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return a; 37a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 38a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 39b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochfunction dead2(a, b) { 40b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch (a | 0) * b; 41b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch (a | 0) << b; 42b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch (a | 0) >> b; 43b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch (a | 0) >>> b; 44b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch (a | 0) | b; 45b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch (a | 0) & b; 46b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch (a | 0) ^ b; 47b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return a; 48a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 49a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 50b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochfunction dead3(a, b) { 51b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch a == 2 ? (a * b) : (b * a); // dead 52b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return a; 53a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 54a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 55b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochfunction dead4(a) { 56b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch var z = 3; 57b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (i = 0; i < 3; i++) { 58b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch z * 3; // dead 59b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 60b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return a; 61b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 62b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 63b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdochfunction dead5(a) { 64b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch var z = 3; 65b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch for (i = 0; i < 3; i++) { 66b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch z * 3; // dead 67b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch z++; 68b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch } 69b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch var w = z * a; 70b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch return a; // w is dead 71b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch} 72b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 73b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochassertTrue(dead1(33, 32) == 33); 74b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochassertTrue(dead2(33, 32) == 33); 75b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochassertTrue(dead3(33, 32) == 33); 76b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochassertTrue(dead4(33) == 33); 77b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochassertTrue(dead5(33) == 33); 78b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 79b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochassertTrue(dead1(34, 7) == 34); 80b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochassertTrue(dead2(34, 7) == 34); 81b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochassertTrue(dead3(34, 7) == 34); 82b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochassertTrue(dead4(34) == 34); 83b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochassertTrue(dead5(34) == 34); 84b8a8cc1952d61a2f3a2568848933943a543b5d3eBen Murdoch 85b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochassertTrue(dead1(3.4, 0.1) == 3.4); 86b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochassertTrue(dead2(3.4, 0.1) == 3.4); 87b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochassertTrue(dead3(3.4, 0.1) == 3.4); 88b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochassertTrue(dead4(3.4) == 3.4); 89b8a8cc1952d61a2f3a2568848933943a543b5d3eBen MurdochassertTrue(dead5(3.4) == 3.4); 90