[Bug target/107432] __builtin_convertvector generates inefficient code

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107432

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 53781
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53781&action=edit
testcase