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f7f6c928c1
PR-URL: https://github.com/nodejs/node/pull/29694 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Gus Caplan <me@gus.host> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
82 lines
1.8 KiB
JavaScript
82 lines
1.8 KiB
JavaScript
// Copyright 2019 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() {
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class A {};
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function foo(a, fn) {
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const C = a.constructor;
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fn(a);
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return a instanceof C;
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};
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%PrepareFunctionForOptimization(foo);
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assertTrue(foo(new A(), a => {}));
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assertTrue(foo(new A(), a => {}));
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%OptimizeFunctionOnNextCall(foo);
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assertTrue(foo(new A(), a => {}));
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assertFalse(foo(new A(), a => { a.__proto__ = {}; }));
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})();
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(function() {
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class A {};
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A.__proto__ = {};
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A.prototype = {};
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function foo() {
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var x = Object.create(Object.create(Object.create(A.prototype)));
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return x instanceof A;
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};
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%PrepareFunctionForOptimization(foo);
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assertTrue(foo());
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assertTrue(foo());
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%OptimizeFunctionOnNextCall(foo);
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assertTrue(foo());
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})();
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(function() {
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class A {};
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A.prototype = {};
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A.__proto__ = {};
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var a = {__proto__: new A, gaga: 42};
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function foo() {
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A.bla; // Make A.__proto__ fast again.
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a.gaga;
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return a instanceof A;
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};
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%PrepareFunctionForOptimization(foo);
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assertTrue(foo());
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assertTrue(foo());
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%OptimizeFunctionOnNextCall(foo);
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assertTrue(foo());
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})();
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(function() {
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class A {};
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A.prototype = {};
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A.__proto__ = {};
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const boundA = Function.prototype.bind.call(A, {});
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boundA.prototype = {};
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boundA.__proto__ = {};
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var a = {__proto__: new boundA, gaga: 42};
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function foo() {
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A.bla; // Make A.__proto__ fast again.
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boundA.bla; // Make boundA.__proto__ fast again.
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a.gaga;
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return a instanceof boundA;
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};
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%PrepareFunctionForOptimization(foo);
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assertTrue(foo());
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assertTrue(foo());
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%OptimizeFunctionOnNextCall(foo);
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assertTrue(foo());
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})();
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