[Bug c/122705] Add function attributes to mark functions that return a pointer parameter, verbatim or derived

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122705

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
We have support already internally for this but not exposed to the user ...