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>
42 lines
994 B
JavaScript
42 lines
994 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 --no-always-turbofan
|
|
// Flags: --no-optimize-maglev-optimizes-to-turbofan
|
|
|
|
class Vector {
|
|
constructor(x) {
|
|
this.x = x;
|
|
}
|
|
}
|
|
|
|
function magnitude(v) {
|
|
return v.x;
|
|
}
|
|
%PrepareFunctionForOptimization(magnitude);
|
|
|
|
const oldObject = new Vector(0); // Map1
|
|
const anotherOldObject = new Vector(0); // Map1
|
|
|
|
const newObject = new Vector(0.6); // Map2
|
|
|
|
// Make Map2 a migration target.
|
|
oldObject.x = 0.3;
|
|
|
|
// Make `magnitude` polymorphic with Map2 (a migration target) and an unrelated
|
|
// map.
|
|
magnitude(newObject);
|
|
const unrelated = {a: 0, b: 0, c: 0, x: 0};
|
|
magnitude(unrelated);
|
|
|
|
%OptimizeMaglevOnNextCall(magnitude);
|
|
magnitude(newObject);
|
|
|
|
assertTrue(isMaglevved(magnitude));
|
|
|
|
// It should now migrate old objects.
|
|
magnitude(anotherOldObject);
|
|
|
|
assertTrue(isMaglevved(magnitude));
|