[Bug tree-optimization/58978] [4.9 Regression] ICE: Segmentation fault

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58978

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Reduced testcase:
int
foo (int x)
{
  switch (x)
    {
    case 0:
    case 1:
    case 9:
      break;
    default:
      __builtin_unreachable ();
    }
  return x;
}