Work around an LLVM bug by not referring to globals from metadata. This was only used for consistency checking anyway. For the LLVM bug, see http://llvm.org/PR4180 / http://llvm.org/PR4046

module enum2;

void main()
{
    enum E {
        A,B
    }
    E e = E.B;
    assert(e == E.B);
}