// Copyright 2017 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 --optfunctionfoo(o){returno.x;}assertEquals(undefined,foo({}));assertEquals(undefined,foo(1));assertEquals(undefined,foo({}));assertEquals(undefined,foo(1));%OptimizeFunctionOnNextCall(foo);assertEquals(undefined,foo({}));assertOptimized(foo);assertEquals(undefined,foo(1));assertOptimized(foo);