// MIR for `ub_if_b` after PreCodegen

fn ub_if_b(_1: Thing) -> Thing {
    debug t => _1;
    let mut _0: Thing;
    let mut _2: isize;
    scope 1 (inlined unreachable_unchecked) {
        scope 2 {
            scope 3 (inlined unreachable_unchecked::runtime) {
                let _3: !;
            }
        }
    }

    bb0: {
        _2 = discriminant(_1);
        switchInt(move _2) -> [0: bb1, 1: bb2, otherwise: bb3];
    }

    bb1: {
        _0 = move _1;
        return;
    }

    bb2: {
        assume(const false);
        _3 = core::panicking::panic_nounwind(const "unsafe precondition(s) violated: hint::unreachable_unchecked must never be reached") -> unwind unreachable;
    }

    bb3: {
        unreachable;
    }
}