v8/test/mjsunit/global-ic.js

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function f() {
  return 87;
}

function LoadFromGlobal(global) { return global.x; }
function StoreToGlobal(global, value) { global.x = value; }
function CallOnGlobal(global) { return global.f(); }

// Initialize the ICs in the functions.
for (var i = 0; i < 3; i++) {
  StoreToGlobal(this, 42 + i);
  assertEquals(42 + i, LoadFromGlobal(this));
  assertEquals(87, CallOnGlobal(this));
}

// Try the ICs with a smi. This should not crash.
for (var i = 0; i < 3; i++) {
  StoreToGlobal(i, 42 + i);
  assertTrue(typeof LoadFromGlobal(i) == "undefined");
  assertThrows("CallOnGlobal(" + i + ")");
}