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 29// Flags: --concurrent-recompilation --block-concurrent-recompilation 30// Flags: --nostress-opt 31 32// --nostress-opt is in place because this particular optimization 33// (guaranteeing that the Array prototype chain has no elements) is 34// maintained isolate-wide. Once it's been "broken" by the change 35// to the Object prototype below, future compiles will not use the 36// optimization anymore, and the code will remain optimized despite 37// additional changes to the prototype chain. 38 39if (!%IsConcurrentRecompilationSupported()) { 40 print("Concurrent recompilation is disabled. Skipping this test."); 41 quit(); 42} 43 44function f1(a, i) { 45 return a[i] + 0.5; 46} 47 48var arr = [0.0,,2.5]; 49assertEquals(0.5, f1(arr, 0)); 50assertEquals(0.5, f1(arr, 0)); 51 52// Optimized code of f1 depends on initial object and array maps. 53%OptimizeFunctionOnNextCall(f1, "concurrent"); 54// Kick off recompilation; 55assertEquals(0.5, f1(arr, 0)); 56// Invalidate current initial object map after compile graph has been created. 57Object.prototype[1] = 1.5; 58assertEquals(2, f1(arr, 1)); 59// Not yet optimized since concurrent recompilation is blocked. 60assertUnoptimized(f1, "no sync"); 61// Let concurrent recompilation proceed. 62%UnblockConcurrentRecompilation(); 63// Sync with background thread to conclude optimization, which bails out 64// due to map dependency. 65assertUnoptimized(f1, "sync"); 66//Clear type info for stress runs. 67%ClearFunctionTypeFeedback(f1); 68