== main ==
fun main() {
    while(1 > 0) {
      2
    }
}
---------------------
l0:
    <START>
l3:
    r(1)
    r(0)
    r(>)
    r(1 > 0)
    jf(l2)
    r(2)
    jmp(l3)
l2:
    read (Unit)
l1:
    <END>
error:
    <ERROR>
=====================
== dowhile ==
fun dowhile() {
    do {return}
    while(1 > 0)
}
---------------------
l0:
    <START>
l3:
    ret l1
    r(1)
    r(0)
    r(>)
    r(1 > 0)
    jt(l3)
l2:
    read (Unit)
l1:
    <END>
error:
    <ERROR>
=====================