[Bug tree-optimization/69489] missed vectorization for boolean loop, missed if-conversion

[amker at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69489

--- Comment #18 from amker at gcc dot gnu.org ---
So the question is why if-conversion generates:
  _43 = _44 & _45;
  _ifc__40 = _43 ? 1 : 0;
  n2_34 = n2_28 + _ifc__40;

Not:
  _43 = _44 & _45;
  _XXX = (long int) _43;
  n2_34 = n2_28 + _XXX;

As in the good test.