[Bug target/120588] [14/15/16/17 regression] poor code when returning struct

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120588

--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 65017
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65017&action=edit
A patch