http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46357 --- Comment #2 from Justin Lebar <justin.lebar+bug at gmail dot com> 2010-11-08 17:08:36 UTC --- (In reply to comment #1) > We always use zero/sign-extending moves to avoid partial register stalls. Sure, but the whole instruction on line 10 is unnecessary.