(FIXED_REGISTERS, CALL_USED_REGISTERS, REGISTER_NAMES,
DEBUG_REGISTER_NAMES): Add entry for new RAP reg.
(RAP_REG_NUM, RETURN_ADDRESS_POINTER_REGNUM): New macros.
(RETURN_ADDR_RTX): Define.
(ELIMINABLE_REGS, CAN_ELIMINATE, INITIAL_ELIMINATION_OFFSET):
Add RETURN_ADDRESS_POINTER_REGNUM support.

From-SVN: r10819