https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103887
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Michal Kubecek from comment #4) > As this is nicer than the original code, I guess I'll use it and hope it is > not just a happy coincidence that it works. It is not, see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19449#c6 (since GCC 4.9.0) for the commit which fixed the issue with __builtin_choose_expr and __builtin_constant_p. Basically __builtin_constant_p(x) is forced to false if x was not a constant expression. _Static_assert folding should be handled the same way and that is what PR 79482 is about really.
