https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78041
--- Comment #9 from Bernd Edlinger <bernd.edlinger at hotmail dot de> --- (In reply to Wilco from comment #8) > > I've got a patch that fixes it, it's being tested. > > While looking at how DI mode operations get expanded, I noticed there is a > CQ issue with your shift change. Shifts that are expanded early now use > extra registers due to the DI mode write of zero. Given all other DI mode > operations are expanded after reload, it may be better to do the same for > shifts too. Interesting idea. After reload there is no need anymore to zero the DI mode register at all, so that could become completely unnecessary.
