[Bug tree-optimization/125788] factor out from more than `a ? xyz : abc`

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125788

--- Comment #2 from Drea Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Drea Pinski from comment #1)
> Note loads (before vectorization) in loops before vectorization need to be
> treated as maybe mask loads.

When we enhance common store sinking to allow for different SSA names as a
memory location, the above applies to stores too.