7772a2df9dPR-URL: https://github.com/nodejs/node/pull/59805 Reviewed-By: Filip Skokan <panva.ip@gmail.com> Reviewed-By: Richard Lau <richard.lau@ibm.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
26 lines
654 B
JavaScript
26 lines
654 B
JavaScript
// Copyright 2024 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 --maglev
|
|
|
|
var stringWrapper = new String('constant');
|
|
|
|
function add(a) {
|
|
return a + stringWrapper;
|
|
}
|
|
%PrepareFunctionForOptimization(add);
|
|
|
|
const string = 'first';
|
|
|
|
assertEquals('firstconstant', add(string));
|
|
%OptimizeMaglevOnNextCall(add);
|
|
|
|
assertEquals('firstconstant', add(string));
|
|
assertTrue(isMaglevved(add));
|
|
|
|
// Invalidate the protector.
|
|
stringWrapper.valueOf = () => 'value';
|
|
|
|
assertUnoptimized(add);
|
|
assertEquals('firstvalue', add(string));
|