procedure Test.0 ():
    let Test.9 = 3i64;
    let Test.3 = Just Test.9;
    let Test.6 = 0i64;
    let Test.7 = GetTagId Test.3;
    let Test.8 = lowlevel Eq Test.6 Test.7;
    if Test.8 then
        let Test.2 = UnionAtIndex (Id 0) (Index 0) Test.3;
        ret Test.2;
    else
        let Test.5 = 0i64;
        ret Test.5;