v8/test/mjsunit/regress/regress-7014-1.js
Mythri A 289b25765a [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}
2019-05-03 15:21:22 +00:00

29 lines
780 B
JavaScript

// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --allow-natives-syntax --opt --no-always-opt
function foo(s) {
return s[5];
}
%PrepareFunctionForOptimization(foo);
assertEquals("f", foo("abcdef"));
assertEquals(undefined, foo("a"));
%OptimizeFunctionOnNextCall(foo);
assertEquals("f", foo("abcdef"));
assertEquals(undefined, foo("a"));
assertOptimized(foo);
// Now mess with the String.prototype.
String.prototype[5] = "5";
assertEquals("f", foo("abcdef"));
%PrepareFunctionForOptimization(foo);
assertEquals("5", foo("a"));
%OptimizeFunctionOnNextCall(foo);
assertEquals("f", foo("abcdef"));
assertEquals("5", foo("a"));
assertOptimized(foo);