   0  int_add %i1, $2 -> %i1
   4  getfield_gc_r %r0, FieldDescr<rpython.rlib.rsre.rsre_utf8.Utf8MatchContext.inst__utf8> -> %r2
   9  inline_call_ir_i <JitCode 'codepoint_at_pos'>, I[%i0], R[%r2] -> %i0
  17  -live- %i0, %i1, %r0, %r1
  20  inline_call_ir_i <JitCode 'check_charset'>, I[%i1, %i0], R[%r0, %r1] -> %i0
  30  -live- %i0
  33  int_return %i0
