[Bug target/83925] [SPARC/Solaris] __int128 aligned(8) as function argument is passed in wrong register

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83925

--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Given the issues we had on ARM, AArch64 (see exempli gratia PR65956 and
associated discussions), et cetera with overaligned/underaligned scalars, I
think the right thing is not to consider alignment for the argument passing and
return value passing decisions at least for scalars.  One can always call a
function with a scalar argument expecting some alignment and callee expecting
different etc.
So, any reason why e.g. in this case the __int128_t arguments shouldn't be
passed always the same, e.g. like normally aligned __int128_t?