If the argument r1 was the same as the extended result register r3+1, we would
overwrite r1 and then use it.
Signed-off-by: NBastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-Id: <1432289758-6250-2-git-send-email-kbastian@mail.uni-paderborn.de>