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