   0  getfield_gc_r %r0, FieldDescr<rpython.rlib.rstruct.runpack.ReaderForPos0.inst_mr> -> %r1
   5  inline_call_ir_r <JitCode 'MasterReader.read'>, I[$4], R[%r1] -> %r1
  13  -live- %r0, %r1
  13  strgetitem %r1, $0 -> %i0
  17  int_lshift %i0, $0 -> %i0
  21  int_or %i0, $0L -> %i0
  25  strgetitem %r1, $1 -> %i1
  29  int_lshift %i1, $8 -> %i1
  33  int_or %i0, %i1 -> %i0
  37  strgetitem %r1, $2 -> %i1
  41  int_lshift %i1, $16 -> %i1
  45  int_or %i0, %i1 -> %i0
  49  strgetitem %r1, $3 -> %i1
  53  int_lshift %i1, $24 -> %i1
  57  int_or %i0, %i1 -> %i0
  61  setfield_gc_i %r0, %i0, FieldDescr<rpython.rlib.rstruct.runpack.ReaderForPos0.inst_value>
  66  void_return
