== foo ==
fun foo(i: Int = 1, j: Int) = i + j
---------------------
             <v1>: Int   NEW: magic[FAKE_INITIALIZER](i: Int = 1) -> <v1>
             <v3>: Int   NEW: magic[FAKE_INITIALIZER](j: Int) -> <v3>    
1            <v0>: Int   NEW: r(1) -> <v0>                               
i: Int = 1   <v2>: Int   NEW: merge(i: Int = 1|<v0>, <v1>) -> <v2>       
i            <v4>: Int   NEW: r(i) -> <v4>                               
j            <v5>: Int   NEW: r(j) -> <v5>                               
i + j        <v6>: Int   NEW: call(i + j, plus|<v4>, <v5>) -> <v6>       
=====================