https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79452
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> --- What about __builtin_constant_expression.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79452
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> --- What about __builtin_constant_expression.