Now that we're using LLVM 2.5, we can stop always running the CFGSimplification pass. The pass was originally added as a workaround for a LLVM 2.4 bug where debug info would reference labels that have been optimized away.

module enum2;

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