   0  int_add %i1, $2 -> %i1
   4  getfield_gc_r_pure %r0, FieldDescr<rpython.rlib.rsre.rsre_core.BufMatchContext.inst__buffer> -> %r2
   9  -live- %i0, %i1, %r0, %r1, %r2
   9  guard_class %r2 -> %i2
  12  getfield_raw_i %i2, FieldDescr<rpython.rlib.buffer.Buffer_vtable.cls_getitem> -> %i2
  17  -live- %i0, %i1, %i2, %r0, %r1, %r2
  17  int_guard_value %i2
  19  residual_call_ir_i %i2, <IndirectCallTargets>, I[%i0], R[%r2], <CallDescr(ri) EF=7> -> %i0
  28  -live- %i0, %i1, %r0, %r1
  28  getfield_gc_i_pure %r1, FieldDescr<rpython.rlib.rsre.rsre_core.CompiledPattern.inst_flags> -> %i2
  33  inline_call_ir_i <JitCode 'getlower'>, I[%i0, %i2], R[] -> %i0
  41  -live- %i0, %i1, %r0, %r1
  41  inline_call_ir_i <JitCode 'check_charset'>, I[%i1, %i0], R[%r0, %r1] -> %i0
  51  -live- %i0
  51  int_return %i0
