198 function SparseSlice(array, start_i, del_count, len, deleted_elements) {  argument
200   var indices = %GetArrayKeys(array, start_i + del_count);
226 function SparseMove(array, start_i, del_count, len, num_additional_args) {  argument
228   if (num_additional_args === del_count) return;
232       MinSimple(len - del_count + num_additional_args, 0xffffffff));
243     for (var i = start_i + del_count; i < limit; ++i) {
246         new_array[i - del_count + num_additional_args] = current;
258       } else if (key >= start_i + del_count) {
261           var new_key = key - del_count + num_additional_args;
287 function SimpleSlice(array, start_i, del_count, len, deleted_elements) {  argument
288   for (var i = 0; i < del_count; i++) {
298 function SimpleMove(array, start_i, del_count, len, num_additional_args) {  argument
299   if (num_additional_args !== del_count) {
302     if (num_additional_args > del_count) {
303       for (var i = len - del_count; i > start_i; i--) {
304         var from_index = i + del_count - 1;
313       for (var i = start_i; i < len - del_count; i++) {
314         var from_index = i + del_count;
322       for (var i = len; i > len - del_count + num_additional_args; i--) {
645   var del_count = 0;
649   del_count = TO_INTEGER(delete_count);
650   if (del_count < 0)
653   if (del_count > len - start_i)
656   return del_count;
667   var del_count = ComputeSpliceDeleteCount(delete_count, num_arguments, len,
669   var deleted_elements = ArraySpeciesCreate(array, del_count);
670   deleted_elements.length = del_count;
673   if (del_count != num_elements_to_add && %object_is_sealed(array)) {
675   } else if (del_count > 0 && %object_is_frozen(array)) {
679   var changed_elements = del_count;
680   if (num_elements_to_add != del_count) {
683     changed_elements += len - start_i - del_count;
688     SparseSlice(array, start_i, del_count, len, deleted_elements);
689     SparseMove(array, start_i, del_count, len, num_elements_to_add);
691     SimpleSlice(array, start_i, del_count, len, deleted_elements);
692     SimpleMove(array, start_i, del_count, len, num_elements_to_add);
703   array.length = len - del_count + num_elements_to_add;