   0  int_add %i1, $2 -> %i1
   4  getfield_gc_r_pure %r0, FieldDescr<rpython.rlib.rsre.rsre_core.StrMatchContext.inst__string> -> %r2
   9  strgetitem %r2, %i0 -> %i0
  13  inline_call_ir_i <JitCode 'check_charset'>, I[%i1, %i0], R[%r0, %r1] -> %i0
  23  -live- %i0
  26  int_return %i0
