[Bug target/102143] ABI incompatibility with clang when passing 32bit vectors on 32bit i686

[hjl.tools at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102143

--- Comment #6 from H.J. Lu <hjl.tools at gmail dot com> ---
I think psABIs should specify how to pass and return 8-bit, 16-bit and 32-bit
vectors.  We can treat them as

struct vectorN
{
   intN
};