// Copyright 2012 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
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//
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// Flags: --allow-natives-syntax --smi-only-arrays --expose-gc
// Flags: --track-allocation-sites

// Test element kind of objects.
// Since --smi-only-arrays affects builtins, its default setting at compile
// time sticks if built with snapshot.  If --smi-only-arrays is deactivated
// by default, only a no-snapshot build actually has smi-only arrays enabled
// in this test case.  Depending on whether smi-only arrays are actually
// enabled, this test takes the appropriate code path to check smi-only arrays.

support_smi_only_arrays = %HasFastSmiElements(new Array(1,2,3,4,5,6,7,8));

if (support_smi_only_arrays) {
  print("Tests include smi-only arrays.");
} else {
  print("Tests do NOT include smi-only arrays.");
}

var elements_kind = {
  fast_smi_only            :  'fast smi only elements',
  fast                     :  'fast elements',
  fast_double              :  'fast double elements',
  dictionary               :  'dictionary elements',
  external_byte            :  'external byte elements',
  external_unsigned_byte   :  'external unsigned byte elements',
  external_short           :  'external short elements',
  external_unsigned_short  :  'external unsigned short elements',
  external_int             :  'external int elements',
  external_unsigned_int    :  'external unsigned int elements',
  external_float           :  'external float elements',
  external_double          :  'external double elements',
  external_pixel           :  'external pixel elements'
}

function getKind(obj) {
  if (%HasFastSmiElements(obj)) return elements_kind.fast_smi_only;
  if (%HasFastObjectElements(obj)) return elements_kind.fast;
  if (%HasFastDoubleElements(obj)) return elements_kind.fast_double;
  if (%HasDictionaryElements(obj)) return elements_kind.dictionary;
}

function assertKind(expected, obj, name_opt) {
  if (!support_smi_only_arrays &&
      expected == elements_kind.fast_smi_only) {
    expected = elements_kind.fast;
  }
  assertEquals(expected, getKind(obj), name_opt);
}

if (support_smi_only_arrays) {
  function fastliteralcase(literal, value) {
    // var literal = [1, 2, 3];
    literal[0] = value;
    return literal;
  }

  function get_standard_literal() {
    var literal = [1, 2, 3];
    return literal;
  }

  // Case: [1,2,3] as allocation site
  obj = fastliteralcase(get_standard_literal(), 1);
  assertKind(elements_kind.fast_smi_only, obj);
  obj = fastliteralcase(get_standard_literal(), 1.5);
  assertKind(elements_kind.fast_double, obj);
  obj = fastliteralcase(get_standard_literal(), 2);
  assertKind(elements_kind.fast_double, obj);

  obj = fastliteralcase([5, 3, 2], 1.5);
  assertKind(elements_kind.fast_double, obj);
  obj = fastliteralcase([3, 6, 2], 1.5);
  assertKind(elements_kind.fast_double, obj);
  obj = fastliteralcase([2, 6, 3], 2);
  assertKind(elements_kind.fast_smi_only, obj);

  // Verify that we will not pretransition the double->fast path.
  obj = fastliteralcase(get_standard_literal(), "elliot");
  assertKind(elements_kind.fast, obj);

  // This fails until we turn off optimistic transitions to the
  // most general elements kind seen on keyed stores. It's a goal
  // to turn it off, but for now we need it.
  // obj = fastliteralcase(3);
  // assertKind(elements_kind.fast_double, obj);

  function fastliteralcase_smifast(value) {
    var literal = [1, 2, 3, 4];
    literal[0] = value;
    return literal;
  }

  obj = fastliteralcase_smifast(1);
  assertKind(elements_kind.fast_smi_only, obj);
  obj = fastliteralcase_smifast("carter");
  assertKind(elements_kind.fast, obj);
  obj = fastliteralcase_smifast(2);
  assertKind(elements_kind.fast, obj);
}