deopt-with-outer-context.js 620 Bytes
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// Copyright 2015 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 outer(y) {
  function inner() {
    var x = 10;
    (function() {
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      // Access x from inner function to force it to be context allocated.
      x = 20;
      %DeoptimizeFunction(inner);
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    })();
    // Variable y should be read from the outer context.
    return y;
  };
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  %PrepareFunctionForOptimization(inner);
  ;
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  %OptimizeFunctionOnNextCall(inner);
  return inner();
}

assertEquals(30, outer(30));