289b25765a
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}
29 lines
780 B
JavaScript
29 lines
780 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[5] = "5";
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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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