f820041aba
This is a reland of 289b25765a.
The fix for failures landed here:
https://chromium-review.googlesource.com/c/v8/v8/+/1599388
Original change's description:
> [Test] Update tests to work with lazy feedback allocation.
>
> This adds either %EnsureFeedbackVectorForFunction or
> %PrepareFunctionForOptimization to allocate feedback vectors when testing
> optimization, allocation sites, IC transitions etc.,
>
> Bug: v8:8394
> Change-Id: I6ad1b6d460e4abda693b326cddb87754e080a0a1
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1593303
> Commit-Queue: Mythri Alle <mythria@chromium.org>
> Auto-Submit: Mythri Alle <mythria@chromium.org>
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#61212}
Bug: v8:8394
Change-Id: Idb5bba221d138e6fd73155f959b9e16fc948c709
TBR: rmcilroy@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1599607
Reviewed-by: Mythri Alle <mythria@chromium.org>
Commit-Queue: Mythri Alle <mythria@chromium.org>
Auto-Submit: Mythri Alle <mythria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61332}
33 lines
872 B
JavaScript
33 lines
872 B
JavaScript
// Copyright 2017 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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// Flags: --allow-natives-syntax --opt --no-always-opt
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function foo(s) {
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return s[5];
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}
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%PrepareFunctionForOptimization(foo);
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assertEquals("f", foo("abcdef"));
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assertEquals(undefined, foo("a"));
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%OptimizeFunctionOnNextCall(foo);
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assertEquals("f", foo("abcdef"));
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assertEquals(undefined, foo("a"));
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assertOptimized(foo);
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// Now mess with the String.prototype.
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String.prototype.__proto__ = new Proxy(String.prototype.__proto__, {
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get(target, property) {
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return "5";
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}
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});
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assertEquals("f", foo("abcdef"));
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%PrepareFunctionForOptimization(foo);
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assertEquals("5", foo("a"));
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%OptimizeFunctionOnNextCall(foo);
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assertEquals("f", foo("abcdef"));
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assertEquals("5", foo("a"));
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assertOptimized(foo);
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