   0  inline_call_r_r <JitCode 'ObjSpace.str_or_None_w'>, R[%r1] -> %r1
   6  -live- %r0, %r1
   6  inline_call_r_r <JitCode 'charbuffer_encode'>, R[%r0, %r1] -> %r0
  13  -live- %r0
  13  ref_return %r0
