[Bug target/100165] fmov could be used to zero out the upper bits instead of movi/zip or movi/ins with __builtin_shuffle and zero vector

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100165

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This 
V
foo (V x)
{
  return __builtin_shuffle (x, (V) { 0, 0, 0, 0,  }, (VI) { 0, 1, 6, 7});
}

Produces:
        movi    v1.4s, 0
        ins     v0.d[1], v1.d[1]

Which is better but fmov is still better :).