[Bug target/79395] Compile error with -mcpu=power9 and __builtin_vec_vcmpne_p

[wschmidt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79395

--- Comment #2 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
(In reply to acsawdey from comment #1)
> * possibly the tests like 3d-01.c should move to gcc.dg/powerpc because
> arguably for -mcpu=power9 we are not testing them fully because of -mno-vsx.

Please leave the test in place, but add new coverage in gcc.target/powerpc for
those built-ins that do have different code generation for ISA 3.0.