[Bug tree-optimization/81346] Missed constant propagation into comparison

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81346

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Most likely the optimization is in fold-const.c and has not been moved to
match.pd yet.