mirror of
https://github.com/nodejs/node.git
synced 2025-05-15 17:51:35 +00:00
50930a0fa0
PR-URL: https://github.com/nodejs/node/pull/39469 Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
25 lines
572 B
JavaScript
25 lines
572 B
JavaScript
// Copyright 2021 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
|
|
|
|
function C(a, b) {
|
|
this.a = a;
|
|
this.b = b;
|
|
}
|
|
|
|
var c = new C(42, 4.2);
|
|
var cc = new C(4.2, 42);
|
|
|
|
function foo() { return cc.a }
|
|
|
|
%PrepareFunctionForOptimization(foo);
|
|
assertEquals(4.2, foo());
|
|
|
|
// Transition representation of 'a' from Double to Tagged.
|
|
Object.defineProperty(c, 'a', { value: undefined });
|
|
|
|
%OptimizeFunctionOnNextCall(foo);
|
|
assertEquals(4.2, foo());
|