https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110976
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- U here stands for unique as in UID. Yes it should not be exposed to the user.
pinskia at gcc dot gnu.org via Gcc-bugs Thu, 10 Aug 2023 12:48:56 -0700
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110976
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- U here stands for unique as in UID. Yes it should not be exposed to the user.