[Bug target/126784] Sub-optimal code sequence for __builtin_convertvector

[hjl.tools at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126784

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 65298
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65298&action=edit
A patch