5b5821142b
This patch improves escape analysis and fixes bugs triggered by clusterfuzz. Impovements include: * Handling of LoadElement/StoreElement if index is a constant * Handling of JSStoreProperty: invalidate all information, as the store could have altered any field. * Treat phis that use an allocation as escaping * Improve resolution of replacements R=mstarzinger@chromium.org BUG=v8:4586 LOG=n Review URL: https://codereview.chromium.org/1499143002 Cr-Commit-Position: refs/heads/master@{#32656}
53 lines
1.9 KiB
JavaScript
53 lines
1.9 KiB
JavaScript
// Copyright 2015 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 --turbo-escape
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//
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function f() {
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return arguments;
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}
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function g(a) {
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"use strict";
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var o = f(1,2);
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if (a) {
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o[0] = 5;
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} else {
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o[0] = 7;
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}
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return o[0];
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}
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assertEquals(7, g());
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assertEquals(7, g());
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%OptimizeFunctionOnNextCall(g);
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assertEquals(5, g(true));
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assertEquals(7, g(false));
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assertEquals(7, g());
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