[Bug target/85198] long long int vector mistaken as long int vector

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85198

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
And the bug is obvious, rs6000_handle_altivec_attribute only cares about mode
of the type and returns precomputed vector types like unsigned_V2DI_type_node
etc. based on the mode, rather than different types based on what the element
type main variant is.