procedure Test.0 ():
    let Test.10 : I64 = 1i64;
    let Test.11 : I64 = 2i64;
    let Test.5 : [C I64, C I64 I64, C I64] = TagId(1) Test.10 Test.11;
    let Test.9 : U8 = GetTagId Test.5;
    switch Test.9:
        case 2:
            let Test.2 : I64 = UnionAtIndex (Id 2) (Index 0) Test.5;
            ret Test.2;
    
        case 0:
            let Test.3 : I64 = UnionAtIndex (Id 0) (Index 0) Test.5;
            ret Test.3;
    
        default:
            let Test.4 : I64 = UnionAtIndex (Id 1) (Index 0) Test.5;
            ret Test.4;