https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93582
--- Comment #14 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Jakub Jelinek from comment #12) > The warning is in dead code, but due to the optimize_bit_field_compare > "optimization" we aren't able to find that out until combine. I am not a fan of that optimization inside fold (mainly because it is way too early). Though replacing it requires a lot other changes; lower bit-field accesses, a few optimizations to reassociation, and then dealing with the other optimization fall outs due to lowering bit-field accesses (mostly store merging). I am working towards that goal for GCC 11. Obviously it is way too late to get that into GCC 10 :).
