918fe04351
PR-URL: https://github.com/nodejs/node/pull/58070 Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com> Reviewed-By: Darshan Sen <raisinten@gmail.com> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
32 lines
782 B
JavaScript
32 lines
782 B
JavaScript
// Copyright 2019 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 --turbofan --noalways-turbofan
|
|
|
|
class C {};
|
|
const c = new C;
|
|
const getPrototypeOf = Object.getPrototypeOf;
|
|
|
|
function bar(f) {
|
|
return f();
|
|
}
|
|
function foo() {
|
|
return bar(getPrototypeOf.bind(undefined, c));
|
|
}
|
|
|
|
%PrepareFunctionForOptimization(foo);
|
|
%PrepareFunctionForOptimization(bar);
|
|
bar(function() {});
|
|
foo();
|
|
%OptimizeFunctionOnNextCall(foo);
|
|
foo();
|
|
assertOptimized(foo);
|
|
|
|
c.prop = 42;
|
|
// Assert that the call reducer optimized the call to Object.getPrototypeOf
|
|
// by asserting that foo gets deopted when c's previous map becomes
|
|
// unstable.
|
|
assertUnoptimized(foo);
|
|
foo();
|