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// Copyright 2016 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(o) {
return o.x instanceof Array;
};
%PrepareFunctionForOptimization(f);
var o = {x: 1.5};
o.x = 0;
f(o);
f(o);
%OptimizeFunctionOnNextCall(f);
f(o);
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