| // Copyright 2020 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 --turboprop --turboprop-dynamic-map-checks --opt |
| // Flags: --no-always-opt |
| |
| function f(o) { |
| return o.b; |
| } |
| |
| var o = {a:10, b:20}; |
| var o1 = {a:10, b:20}; |
| var o2 = {a:10, b:20}; |
| %PrepareFunctionForOptimization(f); |
| f(o); |
| %OptimizeFunctionOnNextCall(f); |
| f(o); |
| assertOptimized(f); |
| |
| // Deprecates o's map. |
| o1.b = 10.23; |
| |
| // Bails out but retains code. |
| f(o1); |
| assertOptimized(f); |
| |
| // Passing in original object should not cause any deopts. |
| f(o); |
| f(o); |
| assertOptimized(f); |
| |
| // o and o2 have the same Map, so there should be no deopts. |
| f(o2); |
| f(o2); |
| assertOptimized(f); |
