[Bug rtl-optimization/92925] RTL expansion throws away misalignment info

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92925

--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
So we would probably need to add full misalignment information to MEM_ATTRS if
we want to handle this properly.