v8/test/mjsunit/keyed-named-access.js

// Copyright 2014 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

var k = "x";
var o1 = {x: 10};
var o2 = {x: 11, y: 20};
var o3 = {x: 12, y: 20, z: 100};

function f(o) {
  var result = 0;
  for (var i = 0; i < 100; i++) {
    result += o[k];
  }
  return result;
}

f(o1);
f(o1);
f(o1);
%OptimizeFunctionOnNextCall(f);
assertEquals(1000, f(o1));

f(o2);
f(o2);
f(o2);
%OptimizeFunctionOnNextCall(f);
assertEquals(1100, f(o2));

f(o3);
f(o3);
f(o3);
%OptimizeFunctionOnNextCall(f);
assertEquals(1200, f(o3));

(function CountOperationDeoptimizationGetter() {
  var global = {};
  global.__defineGetter__("A", function () { return "x"; });

  function h() {
    return "A";
  }

  function g(a, b, c) {
    try {
      return a + b.toString() + c;
    } catch (e) { }
  }

  function test(o)  {
   return g(1, o[h()]--, 10);
  }

  test(global);
  test(global);
  %OptimizeFunctionOnNextCall(test);
  print(test(global));
})();


(function CountOperationDeoptimizationPoint() {
  function test()  {
   this[0, ""]--;
  }

  test();
  test();
  %OptimizeFunctionOnNextCall(test);
  test();
})();