[Bug rtl-optimization/85925] [7/8/9 regression] Mis-compilation at -02, masking with 257 goes wrong in combine

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85925

--- Comment #8 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I'm running this on all archs, to see what (if anything) degrades.