[Bug c/90181] Feature request: provide a way to explicitly select specific named registers in constraints

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90181

--- Comment #15 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
https://gcc.gnu.org/pipermail/gcc-patches/2024-March/647832.html