[Bug target/103316] PowerPC: Gimple folding of int128 comparisons produces suboptimal code

[wschmidt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103316

--- Comment #5 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
At first glance, this is probably because vector.md's definition of
vec_cmp<mode><mode> isn't defined for V1TImode.  Probably needs to be changed
to use VEC_IP rather than VEC_I and implement all the cases for 128-bit.