[Bug target/87598] [8/9 Regression] Rejects "%a0" with constant

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87598

--- Comment #9 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Yes, and the powerpc part is ancient (and no one reported it), so I'm not
planning to backport it.