deopt-array-prototype-pop.js 599 Bytes
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// Copyright 2018 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 --opt

/* Test behaviors when the prototype has elements */

// pop

(function () {
  var array = [, , , ,];

  function pop() {
    return array.pop();
  }

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  %PrepareFunctionForOptimization(pop);

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  assertEquals(pop(), undefined);
  assertEquals(pop(), undefined);

  %OptimizeFunctionOnNextCall(pop);
  assertEquals(pop(), undefined);

  array.__proto__.push(6);
  assertEquals(pop(), 6);
})();