https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80283
--- Comment #9 from Bernd Schmidt <bernds at gcc dot gnu.org> --- Cou(In reply to Michael_S from comment #8) > Here is a variant that makes an issue to show on x64 with -fno-tree-ter. > https://godbolt.org/g/mSLiRZ Could you attach this here as well? I've been trying to get the testcase out of godbolt, but there seems not to be a save option and copy & paste doesn't work either. In general, the problem is that ter makes pessimal scheduling decisions, increasing register pressure. The patch I have adds a little mini-scheduler into the expand stage to try to prevent this. In theory that should also work for testcases where the bad scheduling was done manually, but I'd like to check.
