== test ==
fun test() {
    do {
        val s: String
        s = ""
    } while (s == "")
}
---------------------
""                                                <v0>: String    NEW: r("") -> <v0>
s = ""                                            !<v1>: *
{ val s: String s = "" }                          !<v1>: *        COPY
s                                                 <v2>: *         NEW: r(s) -> <v2>
""                                                <v3>: *         NEW: r("") -> <v3>
s == ""                                           <v4>: Boolean   NEW: call(s == "", equals|<v2>, <v3>) -> <v4>
do { val s: String s = "" } while (s == "")       !<v5>: *
{ do { val s: String s = "" } while (s == "") }   !<v5>: *        COPY
=====================
== test2 ==
fun test2() {
    while (true) {
        val s: String
        s = ""
        if (s != "") break
    }
}
---------------------
                                                               <v1>: *         NEW: magic[VALUE_CONSUMER](true|<v0>) -> <v1>
true                                                           <v0>: Boolean   NEW: r(true) -> <v0>
""                                                             <v2>: String    NEW: r("") -> <v2>
s                                                              <v3>: *         NEW: r(s) -> <v3>
""                                                             <v4>: *         NEW: r("") -> <v4>
s != ""                                                        <v5>: Boolean   NEW: call(s != "", equals|<v3>, <v4>) -> <v5>
break                                                          !<v6>: *
if (s != "") break                                             <v7>: *         NEW: merge(if (s != "") break|!<v6>) -> <v7>
{ val s: String s = "" if (s != "") break }                    <v7>: *         COPY
while (true) { val s: String s = "" if (s != "") break }       !<v8>: *
{ while (true) { val s: String s = "" if (s != "") break } }   !<v8>: *        COPY
=====================