[Bug rtl-optimization/109992] Addition/subtraction to the last bitfield of a struct can be optimized

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109992

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
As an aside: it is funny how x86 does not have a bits insert instruction yet
(while almost all RISC targets have that now).