Adding ElementsAccessor::Concat

src/array.js

 // Copyright 2012 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 504 matching lines @@
   for (var i = 0; i < m; i++) {
     array[i+n] = %_Arguments(i);
   }
 
   var new_length = n + m;
   array.length = new_length;
   return new_length;
 }
 
 
-// Returns an array containing the array elements of the object followed
-// by the array elements of each argument in order. See ECMA-262,
-// section 15.4.4.7.
 function ArrayConcatJS(arg1) {  // length == 1

[Camillo Bruni, 2015/09/04 13:54:55]

This is no longer needed, however, I don't know how to properly remove it, since
it complains during mksnapshot and/or linking.

-  CHECK_OBJECT_COERCIBLE(this, "Array.prototype.concat");
-
-  var array = TO_OBJECT(this);
-  var arg_count = %_ArgumentsLength();
-  var arrays = new InternalArray(1 + arg_count);
-  arrays[0] = array;
-  for (var i = 0; i < arg_count; i++) {
-    arrays[i + 1] = %_Arguments(i);
-  }
-
-  return %ArrayConcat(arrays);
+  return 1
 }
 
 
 // For implementing reverse() on large, sparse arrays.
 function SparseReverse(array, len) {
   var keys = GetSortedArrayKeys(array, %GetArrayKeys(array, len));
   var high_counter = keys.length - 1;
   var low_counter = 0;
   while (low_counter <= high_counter) {
     var i = keys[low_counter];
@@ skipping 1159 matching lines @@
   "array_concat", ArrayConcatJS,
   "array_pop", ArrayPop,
   "array_push", ArrayPush,
   "array_shift", ArrayShift,
   "array_splice", ArraySplice,
   "array_slice", ArraySlice,
   "array_unshift", ArrayUnshift,
 ]);
 
 });