regress-662845.js 431 Bytes
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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 foo(x) {
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  (function() {
    x = 1;
  })();
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  return arguments[0];
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};
%PrepareFunctionForOptimization(foo);
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assertEquals(1, foo(42));
assertEquals(1, foo(42));
%OptimizeFunctionOnNextCall(foo);
assertEquals(1, foo(42));