https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126382
--- Comment #4 from Reshma Roy <Reshma.Roy at amd dot com> --- (In reply to H.J. Lu from comment #3) > Created attachment 65121 [details] > A patch > > Try this. Thanks for the patch, it fixes the issue. Just to understand this better: the problem was that %r10 is live at the entry block but has no reaching definition yet (its defined later, in the prologue-epilog pass later in the pass pipeline), so its missing from DF_LIVE_IN. Could other registers hit the same problem, live across the insertion point, but defined later? If so, would using DF_LR_IN for the whole check be a general fix, since it's a superset of DF_LIVE_IN?
