v8/test/mjsunit/compiler/materialize-dictionary-properties.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() {
  // Create a non-escaping object.
  var o = Object.create(null);
  %DeoptimizeNow();
  // Keep it alive.
  return o ? 1 : 0;
}

%PrepareFunctionForOptimization(f);
f();
f();
%OptimizeFunctionOnNextCall(f);
assertEquals(1, f());