https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53776
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Looks fully fixed since GCC 8.1.0.
[Bug middle-end/53776] pragma optimize does not support Os
pinskia at gcc dot gnu.org via Gcc-bugs Wed, 11 Aug 2021 22:41:52 -0700
