https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114972
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Ever confirmed|0 |1 Status|UNCONFIRMED |NEW Last reconfirmed| |2024-05-07 --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Confirmed. FRE was able to do: RHS a.0_13 + b.1_14 simplified to a.0_3 + b.1_4 has constants 0 But then in GCC 6 it can't see that it is that. Maybe when something moved over to match and simplify it is missed ...