https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102703
--- Comment #8 from Aldy Hernandez <aldyh at redhat dot com> --- On Wed, Oct 13, 2021, 11:37 pinskia at gcc dot gnu.org < gcc-bugzi...@gcc.gnu.org> wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102703 > > --- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> --- > Because: > if (d_11 > 1) > goto <bb 5>; [59.00%] > else > goto <bb 4>; [41.00%] > > <bb 4> [local count: 391808389]: > > <bb 5> [local count: 955630225]: > # iftmp.1_6 = PHI <0(3), 2(4)> > > If the phi node was removed, the original al condition for d_11 > 1 would > be > remove. > As the IL stands, the 3->5 edge has relevant range information. If the IL should be different at this point, there is no way the threader can know this. Aldy
