5f1ae66d56
Added a new %HasComplexElements runtime function (meaning elements that are non-writable, non-configurable, or have getters and setters) and use it in UseSparseVariant to filter out cases where the sparse optimizations can cause V8 to fall out of spec compliance. Renamed SmartMove/SmartSlice to SparseMove/SparseSlice and guarded them with the new and improved UseSparseVariant. These two changes combine let us pass nearly every test in bug-2615.js, as well as fixing reverse and join on sparse arrays. Note that there are various test changes in this patch that correct existing tests to match the correct-by-spec behavior. This patch depends on https://codereview.chromium.org/666883009, which better-aligns the behavior of SmartMove with SimpleMove. BUG=v8:2615,v8:3612,v8:3621 LOG=y R=mstarzinger@chromium.org Review URL: https://codereview.chromium.org/656423004 git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24855 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
12 lines
407 B
JavaScript
12 lines
407 B
JavaScript
// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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var a = [];
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var endIndex = 0xffff;
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a[endIndex] = 3;
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Object.defineProperty(a, 0, { get: function() { this[1] = 2; return 1; } });
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assertEquals('123', a.join(''));
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delete a[1]; // reset the array
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assertEquals('1,2,', a.join().slice(0, 4));
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