   0  getfield_gc_r %r0, FieldDescr<pypy.module._io.interp_bufferedio.W_BufferedRWPair.inst_w_reader> -> %r0
   5  -live- %r0, %r1
   5  goto_if_not_ptr_iszero %r0, L1
   9  new_with_vtable <rpython.jit.backend.llsupport.descr.SizeDescr object at 0x000000018e6b98a0> -> %r0
  13  setfield_gc_r %r0, $<* struct rpy_string>, FieldDescr<pypy.interpreter.error.OpErrFmtNoArgs.inst__value>
  18  setfield_gc_r %r0, $<* struct pypy.interpreter.baseobjspace.W_Root>, FieldDescr<pypy.interpreter.error.OperationError.inst_w_type>
  23  assert_not_none %r0
  25  -live- %r0
  25  guard_class %r0 -> %i0
  28  -live- %r0
  28  raise %r0
  30  ---
  30  L1:
  30  inline_call_r_r <JitCode 'getattr'>, R[%r0, $<* struct pypy.interpreter.baseobjspace.W_Root>] -> %r0
  37  -live- %r0, %r1
  37  inline_call_r_r <JitCode 'call_args'>, R[%r0, %r1] -> %r0
  44  -live- %r0
  44  ref_return %r0
