// MIR for `opt1` after SimplifyCfg-initial

fn opt1(_1: &Result<u32, Void>) -> &u32 {
    debug res => _1;
    let mut _0: &u32;
    let mut _2: isize;
    let _3: &u32;
    let mut _4: !;
    let mut _5: ();
    scope 1 {
        debug x => _3;
    }

    bb0: {
        PlaceMention(_1);
        falseEdge -> [real: bb4, imaginary: bb1];
    }

    bb1: {
        _2 = discriminant((*_1));
        switchInt(move _2) -> [1: bb3, otherwise: bb2];
    }

    bb2: {
        FakeRead(ForMatchedPlace(None), _1);
        unreachable;
    }

    bb3: {
        FakeRead(ForMatchedPlace(None), (((*_1) as Err).0: Void));
        unreachable;
    }

    bb4: {
        StorageLive(_3);
        _3 = &(((*_1) as Ok).0: u32);
        _0 = &(*_3);
        StorageDead(_3);
        return;
    }
}