v8/test/mjsunit/compiler/deopt-now-lazy.js

// 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

function f() {
  %DeoptimizeNow();
}

%PrepareFunctionForOptimization(f);
%OptimizeFunctionOnNextCall(f);
f();