[Bug target/116013] Missed optimization opportunity with andn involving consts

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116013

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note I attached my patches to PR 115086 which fixes this for aarch64. All that
is needed after these patches get approved is either rename the current
patterns in the i386 backend to be andn<mode>3 and iorn<mode>3 and it will work
correctly. even for vector modes.