| // 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 | |
| let o1 = { x: 999 }; | |
| o1.y = 999; | |
| // o2 will share map with o1 in its initial state | |
| var o2 = { x: 1 }; | |
| function f() { | |
| return o2.x; | |
| }; | |
| %PrepareFunctionForOptimization(f); | |
| assertEquals(1, f()); | |
| assertEquals(1, f()); | |
| %OptimizeFunctionOnNextCall(f); | |
| assertEquals(1, f()); | |
| delete o2.x; | |
| o2.x = 2; | |
| assertEquals(2, f()); |