The store(frag, tile_offset) method was computing the pointer offset
without dividing by kElementsPerAccess, while the matching load(frag,
tile_offset) method does include this division. Both load_with_pointer_offset
and store_with_pointer_offset apply the same byte conversion, so the
tile_offset -> pointer_offset calculation must also match.
When kElementsPerAccess > 1, this caused load and store to reference
different memory locations for the same logical tile offset.
Fixes#3017
Signed-off-by: Blake Ledden <bledden@users.noreply.github.com>
7a9fe055cb