[Bug middle-end/123115] -Wunused-but-set-variable warning for EH_RETURN_DATA_REGNO on nvptx

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123115

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think in this function it is ok because there is no register usage of the eh
handler.