== foo ==
fun foo(a: Array<Int>) {
    a[0] += 1
}
---------------------
                <v0>: {<: Array<Int>}   NEW: magic[FAKE_INITIALIZER](a: Array<Int>) -> <v0>
a               <v6>: {<: Array<Int>}   NEW: r(a) -> <v6>                                  
0               <v7>: Int               NEW: r(0) -> <v7>                                  
a[0]            <v3>: Int               NEW: call(a[0], get|<v1>, <v2>) -> <v3>            
1               <v4>: Int               NEW: r(1) -> <v4>                                  
a[0] += 1       <v8>: *                 NEW: call(a[0] += 1, set|<v6>, <v7>, <v5>) -> <v8> 
{ a[0] += 1 }   <v8>: *                 COPY                                               
=====================