[Bug c++/95726] ICE with aarch64 __Float32x4_t as template argument

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95726

--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
Does the aarch64 port expect __Float32x4_t type to be considered equivalent to
the GNU vector type or not?  If so, why use build_distinct_type_copy over
build_variant_type_copy?  If not, they might want to set TYPE_INDIVISIBLE_P so
that structural_comptypes treats them as different.