[Bug target/117007] Poor optimization for small vector constants needed for vector shift/rotate/mask generation

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117007

--- Comment #17 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Hi!

So, why do we not generate xxspltib where it would help.  Please send a patch?
Improvements will usually be to the xxspltib-generating code itself, not to
the legacy code that generates the old (correct, but not ideal here) sequence!