Array.prototype.reverse should call [[HasProperty]] on elements before [[Get]]

src/harmony-typedarray.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.
 
 (function(global, utils) {
 
 "use strict";
 
 %CheckIsBootstrapping();
 
@@ skipping 26 matching lines @@
 var InnerArrayEvery;
 var InnerArrayFill;
 var InnerArrayFilter;
 var InnerArrayFind;
 var InnerArrayFindIndex;
 var InnerArrayForEach;
 var InnerArrayIndexOf;
 var InnerArrayJoin;
 var InnerArrayLastIndexOf;
 var InnerArrayMap;
-var InnerArrayReverse;
 var InnerArraySome;
 var InnerArraySort;
 var InnerArrayToLocaleString;
 var IsNaN;
 var MathMax;
 var MathMin;
+var PackedArrayReverse;
 
 utils.Import(function(from) {
   ArrayFrom = from.ArrayFrom;
   ArrayToString = from.ArrayToString;
   InnerArrayCopyWithin = from.InnerArrayCopyWithin;
   InnerArrayEvery = from.InnerArrayEvery;
   InnerArrayFill = from.InnerArrayFill;
   InnerArrayFilter = from.InnerArrayFilter;
   InnerArrayFind = from.InnerArrayFind;
   InnerArrayFindIndex = from.InnerArrayFindIndex;
   InnerArrayForEach = from.InnerArrayForEach;
   InnerArrayIndexOf = from.InnerArrayIndexOf;
   InnerArrayJoin = from.InnerArrayJoin;
   InnerArrayLastIndexOf = from.InnerArrayLastIndexOf;
   InnerArrayMap = from.InnerArrayMap;
   InnerArrayReduce = from.InnerArrayReduce;
   InnerArrayReduceRight = from.InnerArrayReduceRight;
-  InnerArrayReverse = from.InnerArrayReverse;
   InnerArraySome = from.InnerArraySome;
   InnerArraySort = from.InnerArraySort;
   InnerArrayToLocaleString = from.InnerArrayToLocaleString;
   IsNaN = from.IsNaN;
   MathMax = from.MathMax;
   MathMin = from.MathMin;
+  PackedArrayReverse = from.PackedArrayReverse;
 });
 
 // -------------------------------------------------------------------
 
 function ConstructTypedArray(constructor, arg) {
   // TODO(littledan): This is an approximation of the spec, which requires
   // that only real TypedArray classes should be accepted (22.2.2.1.1)
   if (!%IsConstructor(constructor) || IS_UNDEFINED(constructor.prototype) ||
       !%HasOwnProperty(constructor.prototype, "BYTES_PER_ELEMENT")) {
     throw MakeTypeError(kNotTypedArray);
@@ skipping 84 matching lines @@
   return InnerArrayFindIndex(predicate, thisArg, this, length);
 }
 %FunctionSetLength(TypedArrayFindIndex, 1);
 
 // ES6 draft 05-18-15, section 22.2.3.21
 function TypedArrayReverse() {
   if (!%_IsTypedArray(this)) throw MakeTypeError(kNotTypedArray);
 
   var length = %_TypedArrayGetLength(this);
 
-  return InnerArrayReverse(this, length);
+  return PackedArrayReverse(this, length);
 }
 
 
 function TypedArrayComparefn(x, y) {
   if (IsNaN(x) && IsNaN(y)) {
     return IsNaN(y) ? 0 : 1;
   }
   if (IsNaN(x)) {
     return 1;
   }
@@ skipping 211 matching lines @@
     "some", TypedArraySome,
     "sort", TypedArraySort,
     "toString", TypedArrayToString,
     "toLocaleString", TypedArrayToLocaleString
   ]);
 endmacro
 
 TYPED_ARRAYS(EXTEND_TYPED_ARRAY)
 
 })