[Bug tree-optimization/59519] [4.9 Regression] ICE on valid code at -O3 on x86_64-linux-gnu in slpeel_update_phi_nodes_for_guard1, at tree-vect-loop-manip.c:486

["jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59519

--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I've tried even:
struct S { int f0; } d;
int a[8] = { 0 }, b, c, e, f;

void
foo (void)
{
  for (; e < 1; e++)
    {
      for (b = 0; b < 7; b++)
        {
          c |= (a[b + 1] != 0);
          if (d.f0)
            break;
        }
      f += b;
    }
}

where I've hoped get_current_def would be called on the problematic loop_arg,
but apparently it isn't (the only calls are the one changed in the patch).