v8/test/mjsunit/closures.js

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// Flags: --allow-natives-syntax

function runner(f, expected) {
  assertEquals(expected, f.call(this));
}

function test(n) {
  function MyFunction() {
    var result = n * 2 + arguments.length;
    return result;
  };
  %PrepareFunctionForOptimization(MyFunction);
  for (var i = 0; i < 5; ++i) MyFunction();
  %OptimizeFunctionOnNextCall(MyFunction);
  runner(MyFunction, n * 2);
}

test(1);
test(42);
test(239);