[Bug target/125636] [missed optimization] HImode byte-extend from memory causes partial-register-write stall on modern x86-64

[etc_26 at yahoo dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125636

--- Comment #2 from Eitan <etc_26 at yahoo dot com> ---
Created attachment 64646
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=64646&action=edit
Suggested fix