* final.c: Move the declaration profile_label_no to ...
        * output.h: ... here.
        * function.c (expand_function_start): Call PROFILE_HOOK.
        * config/rs6000/aix.h: Define PROFILE_HOOK.
        * config/rs6000/rs6000-protos.h: output_profile_hook new.
        * config/rs6000/rs6000.c (output_profile_hook): Define.
        (output_prolog): Do nothing for ABI_AIX as it is taken care by
        output_profile_hook.
        tm.texi : Explain new macro PROFILE_HOOK.

From-SVN: r39473