   0  getfield_gc_i_pure %r0, FieldDescr<rpython.rlib.rthread.Lock.inst__lock> -> %i0
   5  residual_call_ir_i $<* fn RPyThreadReleaseLock>, I[%i0], R[], <CallDescr(i) EF=2> -> %i0
  13  -live- %i0
  16  goto_if_not_int_is_true %i0, L1
  20  raise $<* struct object>
  22  ---
  22  L1:
  22  void_return
