https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78685
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- (In reply to rguent...@suse.de from comment #3) > Sth orthogonal to -Og, -fkeep-vars-live=N with some level, default > to N > 0 for -Og maybe. > > Of course it will likely pessimize code as I don't see how we can > easily compute whether var-tracking might reverse compute a vars > value from sth else. Yes, trying to guess whether var-tracking will be able to figure something out is pretty much impossible, perhaps except for easiest cases e.g. where one var is some other user var + const or something similar. And sure, it would pessimize code a lot.
