| // Copyright 2013 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| // Flags: --allow-natives-syntax |
| // Flags: --concurrent-recompilation --block-concurrent-recompilation |
| // Flags: --nostress-opt |
| |
| // --nostress-opt is in place because this particular optimization |
| // (guaranteeing that the Array prototype chain has no elements) is |
| // maintained isolate-wide. Once it's been "broken" by the change |
| // to the Object prototype below, future compiles will not use the |
| // optimization anymore, and the code will remain optimized despite |
| // additional changes to the prototype chain. |
| |
| if (!%IsConcurrentRecompilationSupported()) { |
| print("Concurrent recompilation is disabled. Skipping this test."); |
| quit(); |
| } |
| |
| function f1(a, i) { |
| return a[i] + 0.5; |
| } |
| |
| var arr = [0.0,,2.5]; |
| assertEquals(0.5, f1(arr, 0)); |
| assertEquals(0.5, f1(arr, 0)); |
| |
| // Optimized code of f1 depends on initial object and array maps. |
| %OptimizeFunctionOnNextCall(f1, "concurrent"); |
| // Kick off recompilation; |
| assertEquals(0.5, f1(arr, 0)); |
| // Invalidate current initial object map after compile graph has been created. |
| Object.prototype[1] = 1.5; |
| assertEquals(2, f1(arr, 1)); |
| // Not yet optimized since concurrent recompilation is blocked. |
| assertUnoptimized(f1, "no sync"); |
| // Let concurrent recompilation proceed. |
| %UnblockConcurrentRecompilation(); |
| // Sync with background thread to conclude optimization, which bails out |
| // due to map dependency. |
| assertUnoptimized(f1, "sync"); |
| //Clear type info for stress runs. |
| %ClearFunctionTypeFeedback(f1); |