https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98710
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Last reconfirmed|2021-04-26 00:00:00 |2023-5-12 --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (x | c) & ~(y | c) -> (x | c) & (~y & ~c) -> (x & ~y & ~c) | (c & ~y & ~c) -> (x & ~y & ~c) -> x & ~(y | c) Just this simple: (simplify (bit_and:c (bit_ior:c @0 @1) (bit_not@3 (bit_ior:c @1 @2))) (bit_and @0 @3)) No reason to rewrite @3 part again.