https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67628
--- Comment #4 from ktkachov at gcc dot gnu.org --- (In reply to Andrew Pinski from comment #3) > (In reply to ktkachov from comment #2) > > (In reply to Andrew Pinski from comment #1) > > > This is due to the fold-const.c optimization which should not be there any > > > more. You need to do benchmarking on x86 also if you remove it. > > > > > > > could you elaborate what optimization is that? > > Is it a matter of fold-const.c or match.pd canonicalizing the expression in > > some way? > > The optimization is converting andif into and. Basically ifcombine pass does > not recombine them if fold-const does it early on. Right, seems like the code in fold_truth_andor. I think ifcombine should be doing a better job here though
