31a3cfbc10
BUG=v8:8801 Change-Id: I9d9d9824c6c9ad0176bbfd3723da1b578b17c256 Reviewed-on: https://chromium-review.googlesource.com/c/1495555 Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Cr-Commit-Position: refs/heads/master@{#60001}
31 lines
918 B
JavaScript
31 lines
918 B
JavaScript
// Copyright 2018 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
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(function TestWithNullPrototype() {
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function f() { return Object.create(null); }
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%PrepareFunctionForOptimization(f);
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f();
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%OptimizeFunctionOnNextCall(f);
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assertEquals(undefined, f().foo);
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})();
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(function TestWithCustomPrototype() {
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const x = {foo: 42}; // This must be defined here for context specialization.
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function f() { return Object.create(x); }
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%PrepareFunctionForOptimization(f);
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f();
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%OptimizeFunctionOnNextCall(f);
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assertEquals(42, f().foo);
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})();
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(function TestWithObjectPrototype() {
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function f() { return Object.create(Object.prototype); }
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%PrepareFunctionForOptimization(f);
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f();
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%OptimizeFunctionOnNextCall(f);
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assertEquals("[object Object]", f().toString());
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})();
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