[Bug target/125859] promote_duplicated_reg (HImode, val) doesn't work

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125859

--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 64766
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=64766&action=edit
A patch