| // 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 |
| |
| function foo(o) { return {...o}; } |
| |
| // Warmup the CloneObjectIC with `o.x` being |
| // a HeapObject field. |
| var o = {data:null}; |
| %PrepareFunctionForOptimization(foo); |
| foo(o); |
| foo(o); |
| |
| // Now update the field representation of o.x |
| // in-place from HeapObject to Tagged and make |
| // sure that this is handled properly in the |
| // fast-path for CloneObjectIC. |
| o.data = 1; |
| assertEquals(1, %GetProperty(foo(o), "data")); |
