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: --use-osr --allow-natives-syntax --crankshaft 29 30 var o1 = {a : 10}; 31 var o2 = { }; 32 o2.__proto__ = o1; 33 var o3 = { }; 34 o3.__proto__ = o2; 35 36 function f(n, x, b) { 37 var sum = x.a; 38 for (var i = 0; i < n; i++) { 39 sum = 1.0 / i; 40 } 41 return sum; 42 } 43 44 f(10, o3); 45 f(20, o3); 46 f(30, o3); 47 %OptimizeFunctionOnNextCall(f, "concurrent"); 48 f(100000, o3); 49 // At this point OSR replaces already optimized code. 50 // Check that it evicts old code from cache. 51 52 // This causes all code for f to be lazily deopted. 53 o2.a = 5; 54 55 // If OSR did not evict the old code, it will be installed in f here. 56 %OptimizeFunctionOnNextCall(f); 57 f(10, o3); 58 59 // The old code is already deoptimized, but f still points to it. 60 // Disassembling it will crash. 61 %DisassembleFunction(f); 62
