   0  new_with_vtable <rpython.jit.backend.llsupport.descr.SizeDescr object at 0x00000001b0a6f1d8> -> %r1
   4  inline_call_ir_v <JitCode 'W_Library.__init__'>, I[%i0], R[%r1, %r0]
  12  -live- %r1
  12  ref_return %r1
