There are a few places that still use oopDesc::load_decode_heap_oop and friends. Most of the usages where removed when the Access API was introduced, but some are still left. This RFE intends to remove those last usages.

The load/store functions have been replaced by calls to RawAccess.

The encode/decode functions main purpose is to deal with oops to/from narrowOop conversions. These functions are moved to a new CompressedOops subsystem.

The move of the CompressedOops encode/decode functions removes a circular dependency between oop.inline.hpp and access.inline.hpp. After the change we have:
oop.inline.hpp includes:
  access.inline.hpp
  compressedOops.inline.hpp

access.inline.hpp includes:
  compressedOops.inline.hpp