function u0:3(i64, i64) system_v {
    sig0 = (i8) -> i8 system_v

block0(v0: i64, v1: i64):
    v2 = load.i8 notrap aligned v1
    v3 = call_indirect sig0, v0(v2)
    store notrap aligned v3, v1
    return
}