https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79003
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Martin Liška from comment #4) > Just to document, I see another Werror in LTO bootstrap: > > ../../gcc/predict.c: In function ‘set_even_probabilities’: > ../../gcc/predict.c:798:8: error: ‘e’ may be used uninitialized in this > function [-Werror=maybe-uninitialized] > edge e; > ^ > > Where LIM does following transformation: > > <bb 2> [15.14%]: > _1 = &bb_23(D)->succs; > if (_1 == 0B) > goto <bb 3>; [0.04%] > else > goto <bb 35>; [99.96%] > > <bb 35> [15.13%]: > _79 = MEM[(struct vec * *)bb_23(D) + 8B]; > e_lsm.1284_111 = e; > e_lsm.1285_130 = 0; > goto <bb 4>; [100.00%] > > <bb 3> [0.04%]: > _ZL12ei_container13edge_iterator.isra.19.part.20 (); > > <bb 4> [99.96%]: > # nedges_90 = PHI <nedges_16(14), 0(35)> > # _93 = PHI <_94(14), 0(35)> > # e_lsm.1284_2 = PHI <e_lsm.1284_45(14), e_lsm.1284_111(35)> > # e_lsm.1285_15 = PHI <e_lsm.1285_5(14), e_lsm.1285_130(35)> > if (_79 != 0B) > goto <bb 5>; [70.00%] > else > goto <bb 6>; [30.00%] > > I guess it's a false positive. Or PR39612.
