   0  inline_call_r_r <JitCode 'PackFormatIterator.accept_obj_arg'>, R[%r0] -> %r1
   6  -live- %r0, %r1
   6  inline_call_r_r <JitCode 'convert_arg_to_w_unicode'>, R[%r1, $<* struct rpy_string>] -> %r1
  13  -live- %r0, %r1
  13  getfield_gc_r_pure %r1, FieldDescr<pypy.objspace.std.unicodeobject.W_UnicodeObject.inst__utf8> -> %r2
  18  getfield_gc_i %r1, FieldDescr<pypy.objspace.std.unicodeobject.W_UnicodeObject.inst__length> -> %i0
  23  -live- %i0, %r0, %r2
  23  goto_if_not_int_ne %i0, $1, L1
  28  new_with_vtable <rpython.jit.backend.llsupport.descr.SizeDescr object at 0x000000019f64f088> -> %r0
  32  setfield_gc_r %r0, $<* struct rpy_string>, FieldDescr<rpython.rlib.rstruct.error.StructError.inst_msg>
  37  assert_not_none %r0
  39  -live- %r0
  39  guard_class %r0 -> %i0
  42  -live- %r0
  42  raise %r0
  44  ---
  44  L1:
  44  inline_call_ir_i <JitCode 'codepoint_at_pos'>, I[$0], R[%r2] -> %i0
  52  -live- %i0, %r0
  52  getfield_gc_r %r0, FieldDescr<pypy.module.struct.formatiterator.PackFormatIterator.inst_wbuf> -> %r1
  57  getfield_gc_i %r0, FieldDescr<pypy.module.struct.formatiterator.PackFormatIterator.inst_pos> -> %i1
  62  inline_call_ir_v <JitCode 'pack_codepoint'>, I[%i0, %i1], R[%r1]
  70  -live- %r0
  70  getfield_gc_i %r0, FieldDescr<pypy.module.struct.formatiterator.PackFormatIterator.inst_pos> -> %i0
  75  int_add %i0, $4 -> %i0
  79  setfield_gc_i %r0, %i0, FieldDescr<pypy.module.struct.formatiterator.PackFormatIterator.inst_pos>
  84  void_return
