[Bug middle-end/109456] `-ffixed` is ignored for `a` registers on RISC-V.

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109456

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Seems like using a global register is not really recommended, especially one
that is used for argument passing.