* config/ia64/ia64.c (ia64_expand_atomic_op): Add model parameter.
        Generate the barrier required for the memory model.
        (rtx_needs_barrier): Handle UNSPEC_FETCHADD_REL, UNSPEC_CMPXCHG_REL.
        * config/ia64/ia64-protos.h: Update.
        * config/ia64/ia64.md (UNSPEC_FETCHADD_REL): New.
        (UNSPEC_CMPXCHG_REL): New.
        * config/ia64/sync.md (mem_thread_fence): New.
        (atomic_load<IMODE>, atomic_store<IMODE>): New.
        (atomic_compare_and_swap<IMODE>): New.
        (cmpxchg_acq_<I124MODE>, cmpxchg_acq_di): New.
        (atomic_exchange<IMODE>): New.
        (xchg_acq_<IMODE>): Rename from sync_lock_test_and_set<IMODE>.
        (atomic_<FETCHOP><IMODE>, atomic_nand<IMODE>): New.
        (atomic_fetch_<FETCHOP><IMODE>, atomic_fetch_nand<IMODE>): New.
        (atomic_<FETCHOP>_fetch<IMODE>, atomic_nand_fetch<IMODE>): New.
        (fetchadd_rel_<I48MODE>): New.
        (sync_<FETCHOP><IMODE>, sync_nand<IMODE>): Remove.
        (sync_old_<FETCHOP><IMODE>, sync_old_nand<IMODE>): Remove.
        (sync_new_<FETCHOP><IMODE>, sync_new_nand<IMODE>): Remove.
        (sync_compare_and_swap<IMODE>): Remove.
        (sync_lock_release<IMODE>): Remove.

From-SVN: r181643