== foo ==
fun foo(a: Any) {
    a as String
    a as? String
}
---------------------
                               <v0>: {<: Any}   NEW: magic[FAKE_INITIALIZER](a: Any) -> <v0>
a                              <v1>: *          NEW: r(a) -> <v1>
a as String                    <v2>: *          NEW: magic[CAST](a as String|<v1>) -> <v2>
a                              <v3>: *          NEW: r(a) -> <v3>
a as? String                   <v4>: *          NEW: magic[CAST](a as? String|<v3>) -> <v4>
{ a as String a as? String }   <v4>: *          COPY
=====================