[Bug target/118480] Power9 target generates poor code for vector char splat immediate.

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118480

--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Does xxspltib_constant_p return the wrong num_insns, or is the problem
something
lower, some splitter?