[Bug tree-optimization/114369] tree-vect-loop.cc uses vec_step which is also an altivec intrinsics breaks build when building with clang

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114369

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
I'm inclined to close this as INVALID, but I'd accept working around the
clang bug by, in system.h, guarded on __clang and powerpc, doing an #undef
vec_step.