// MIR for `old` after PreCodegen

fn old(_1: Result<T, E>) -> Result<T, E> {
    debug x => _1;                       // in scope 0 at $DIR/try_identity_e2e.rs:+0:14: +0:15
    let mut _0: std::result::Result<T, E>; // return place in scope 0 at $DIR/try_identity_e2e.rs:+0:34: +0:46
    let mut _2: isize;                   // in scope 0 at $DIR/try_identity_e2e.rs:+3:13: +3:18
    let _3: T;                           // in scope 0 at $DIR/try_identity_e2e.rs:+3:16: +3:17
    let _4: E;                           // in scope 0 at $DIR/try_identity_e2e.rs:+4:17: +4:18
    scope 1 {
        debug v => _3;                   // in scope 1 at $DIR/try_identity_e2e.rs:+3:16: +3:17
    }
    scope 2 {
        debug e => _4;                   // in scope 2 at $DIR/try_identity_e2e.rs:+4:17: +4:18
    }

    bb0: {
        _2 = discriminant(_1);           // scope 0 at $DIR/try_identity_e2e.rs:+2:15: +2:16
        switchInt(move _2) -> [0: bb3, 1: bb1, otherwise: bb2]; // scope 0 at $DIR/try_identity_e2e.rs:+2:9: +2:16
    }

    bb1: {
        _4 = move ((_1 as Err).0: E);    // scope 0 at $DIR/try_identity_e2e.rs:+4:17: +4:18
        _0 = Result::<T, E>::Err(move _4); // scope 2 at $DIR/try_identity_e2e.rs:+4:30: +4:36
        return;                          // scope 0 at $DIR/try_identity_e2e.rs:+7:1: +7:2
    }

    bb2: {
        unreachable;                     // scope 0 at $DIR/try_identity_e2e.rs:+2:15: +2:16
    }

    bb3: {
        _3 = move ((_1 as Ok).0: T);     // scope 0 at $DIR/try_identity_e2e.rs:+3:16: +3:17
        _0 = Result::<T, E>::Ok(move _3); // scope 0 at $DIR/try_identity_e2e.rs:+1:5: +6:6
        return;                          // scope 0 at $DIR/try_identity_e2e.rs:+7:1: +7:2
    }
}