   0  inline_call_ir_r <JitCode 'interp_w__W_CType'>, I[$False], R[%r0] -> %r0
   8  -live- %r0, %r1, %r2, %r3
   8  residual_call_r_r $<* fn make_callback>, R[%r0, %r1, %r2, %r3], <CallDescr(rrrr) EF=7> -> %r0
  18  -live- %r0
  18  ref_return %r0
