   0  inline_call_ir_r <JitCode 'interp_w__W_Float64Box'>, I[$False], R[%r0] -> %r0
   8  -live- %r0
   8  inline_call_r_r <JitCode 'W_GenericBox.item'>, R[%r0] -> %r0
  14  -live- %r0
  14  inline_call_r_r <JitCode 'call_method_opt__star_0'>, R[%r0, $<* struct rpy_string>] -> %r0
  21  -live- %r0
  21  ref_return %r0
