1 // Copyright 2013 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 28 // Flags: --allow-natives-syntax --nodead-code-elimination 29 // Flags: --nofold-constants --nouse-gvn 30 31 // Create a function to get a long series of removable simulates. 32 // f() { 33 // var _0 = <random>, _1 = <random>, ... _1000 = <random>, 34 // _1001 = <random var> + <random var>, 35 // _1002 = <random var> + <random var>, 36 // ... 37 // _99999 = <random var> + <random var>, 38 // x = 1; 39 // return _0; 40 // } 41 42 var seed = 1; 43 44 function rand() { 45 seed = seed * 171 % 1337 + 17; 46 return (seed % 1000) / 1000; 47 } 48 49 function randi(max) { 50 seed = seed * 131 % 1773 + 13; 51 return seed % max; 52 } 53 54 function varname(i) { 55 return "_" + i; 56 } 57 58 var source = "var "; 59 60 for (var i = 0; i < 750; i++) { 61 source += [varname(i), "=", rand(), ","].join(""); 62 } 63 64 for (var i = 750; i < 3000; i++) { 65 source += [varname(i), "=", 66 varname(randi(i)), "+", 67 varname(randi(i)), ","].join(""); 68 } 69 70 source += "x=1; return _0;" 71 var f = new Function(source); 72 73 f(); 74 %OptimizeFunctionOnNextCall(f); 75 f(); 76
