Function test_wrapper

deps/v8/test/mjsunit/elements-kind.js:104–171

()

// Make sure the element kind transitions from smi when a non-smi is stored.
function test_wrapper() {
  var you = new Array();
  assertKind(elements_kind.fast_smi_only, you);
  for (var i = 0; i < 1337; i++) {
    var val = i;
    if (i == 1336) {
      assertKind(elements_kind.fast_smi_only, you);
      val = new Object();
    }
    you[i] = val;
  }
  assertKind(elements_kind.fast, you);

  var temp = [];
  // If we store beyond kMaxGap (1024) we should transition to slow elements.
  temp[1024] = 0;
  assertKind(elements_kind.dictionary, temp);

  var fast_double_array = new Array(0xDECAF);
  // If the gap is greater than 1024 (kMaxGap) we would transition the array
  // to slow. So increment should be less than 1024.
  for (var i = 0; i < 0xDECAF; i+=1023) {
    fast_double_array[i] = i / 2;
  }
  assertKind(elements_kind.fast_double, fast_double_array);

  assertKind(elements_kind.fixed_int8,    new Int8Array(007));
  assertKind(elements_kind.fixed_uint8,   new Uint8Array(007));
  assertKind(elements_kind.fixed_int16,   new Int16Array(666));
  assertKind(elements_kind.fixed_uint16,  new Uint16Array(42));
  assertKind(elements_kind.fixed_int32,   new Int32Array(0xF));
  assertKind(elements_kind.fixed_uint32,  new Uint32Array(23));
  assertKind(elements_kind.fixed_float16, new Float16Array(7));
  assertKind(elements_kind.fixed_float32, new Float32Array(7));
  assertKind(elements_kind.fixed_float64, new Float64Array(0));
  assertKind(elements_kind.fixed_uint8_clamped, new Uint8ClampedArray(512));

  var ab = new ArrayBuffer(128);
  assertKind(elements_kind.fixed_int8,    new Int8Array(ab));
  assertKind(elements_kind.fixed_uint8,   new Uint8Array(ab));
  assertKind(elements_kind.fixed_int16,   new Int16Array(ab));
  assertKind(elements_kind.fixed_uint16,  new Uint16Array(ab));
  assertKind(elements_kind.fixed_int32,   new Int32Array(ab));
  assertKind(elements_kind.fixed_uint32,  new Uint32Array(ab));
  assertKind(elements_kind.fixed_float16, new Float16Array(ab));
  assertKind(elements_kind.fixed_float32, new Float32Array(ab));
  assertKind(elements_kind.fixed_float64, new Float64Array(ab));
  assertKind(elements_kind.fixed_uint8_clamped, new Uint8ClampedArray(ab));

  // Crankshaft support for smi-only array elements.
  function monomorphic(array) {
    assertKind(elements_kind.fast_smi_only, array);
    for (var i = 0; i < 3; i++) {
      array[i] = i + 10;
    }
    assertKind(elements_kind.fast_smi_only, array);
    for (var i = 0; i < 3; i++) {
      var a = array[i];