[Bug target/125636] QI extends to HImode causes partial-register write stalls

[etc_26 at yahoo dot com via Gcc-bugs]

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

--- Comment #7 from Eitan <etc_26 at yahoo dot com> ---
You're right, Drea, this is much simpler. I'll attach a new patch and test
case.