[Bug c++/122393] GCC -O3 fails to optimize loop over constexpr array of enum implementing contains() to a bitmask AND

[marc.mutz at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122393

--- Comment #1 from Marc Mutz <marc.mutz at hotmail dot com> ---
Created attachment 62621
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=62621&action=edit
Clang proprocessed source