[Bug middle-end/84747] alias analysis reports may-conflict for references to disjoint address spaces

[gjl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84747

--- Comment #6 from Georg-Johann Lay <gjl at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #5)
> This is still an useful patch as it should help out on say AVR (I think that
> is the only other target that currently implements address spaces and has 2
> or 3 address spaces which are NOT a subset of each other).

All AVR address-spaces are const.  Except the generic one of course.