https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101914
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- GCC 6 rejected the code.
pinskia at gcc dot gnu.org via Gcc-bugs Fri, 01 Oct 2021 03:16:38 -0700
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101914
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- GCC 6 rejected the code.