[Bug rtl-optimization/79003] [7 Regression] r238991 breaks ODR

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79003

--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
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.