https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118581
--- Comment #5 from Hongtao Liu <liuhongt at gcc dot gnu.org> --- (In reply to Richard Biener from comment #2) > (In reply to Richard Biener from comment #1) > > Does it have counter info for PHI arguments (aka copies emitted on those > > edges)? > > I think yes, so IMO it should check a single successors PHIs corresponding > to the block and use those counts. It helps, w/ non-zero count, PRE can do the work and finally fixs the performance drop for 519.lbm_r after anabling autofdo.
