[Bug tree-optimization/112271] Some `(a == CST) ? a OP b : CST` is not done in match

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112271

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Actually this is basically moving absorbing_element_p to match.