| // 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 load(obj){ | |
| return obj.x; | |
| } | |
| var o = {x: 10, y:20}; | |
| var o1 = {x:10, y:20, z:30}; | |
| %PrepareFunctionForOptimization(load); | |
| // polymorphic with same handler | |
| load(o); | |
| load(o1); | |
| %OptimizeFunctionOnNextCall(load); | |
| load(o); | |
| load(o1); | |
| assertOptimized(load); | |
| var o2 = {y: 10, x:20}; | |
| // deopts but stays optimized | |
| load(o2); | |
| assertOptimized(load); | |
| // deopts and discard code on wrong handler | |
| load(o2); | |
| assertUnoptimized(load); |