| // 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 --concurrent-inlining |
| // Flags: --opt --noalways-opt --noturboprop |
| class C {}; |
| const c = new C; |
| const getPrototypeOf = Object.getPrototypeOf; |
| |
| function bar(f) { |
| return f(); |
| } |
| function foo() { |
| return bar(getPrototypeOf.bind(undefined, c)); |
| } |
| |
| %PrepareFunctionForOptimization(foo); |
| %PrepareFunctionForOptimization(bar); |
| bar(function() {}); |
| foo(); |
| %OptimizeFunctionOnNextCall(foo); |
| foo(); |
| assertOptimized(foo); |
| |
| c.prop = 42; |
| // Assert that the call reducer optimized the call to Object.getPrototypeOf |
| // by asserting that foo gets deopted when c's previous map becomes |
| // unstable. |
| foo(); |
| assertUnoptimized(foo); |
