   0  getfield_gc_r_pure %r0, FieldDescr<rpython.rlib.buffer.StringBuffer.inst_value> -> %r0
   5  -live- %i0, %r0
   5  goto_if_not_int_lt %i0, $0, L1
  10  strlen %r0 -> %i1
  13  int_add %i0, %i1 -> %i0
  17  L2:
  17  strgetitem %r0, %i0 -> %i1
  21  int_return %i1
  23  ---
  23  L1:
  23  goto L2
