   0  -live- %r0
   0  guard_class %r0 -> %i0
   3  getfield_raw_i %i0, FieldDescr<pypy.interpreter.baseobjspace.W_Root_vtable.cls_getweakref> -> %i0
   8  -live- %i0, %r0
   8  int_guard_value %i0
  10  residual_call_r_r %i0, <IndirectCallTargets>, R[%r0], <CallDescr(r) EF=7> -> %r1
  17  -live- %r0, %r1
  17  -live- %r0, %r1
  17  goto_if_not_ptr_iszero %r1, L1
  21  new_with_vtable <rpython.jit.backend.llsupport.descr.SizeDescr object at 0x4eecc790> -> %r1
  25  setfield_gc_i %r1, $False, FieldDescr<pypy.module._weakref.interp__weakref.WeakrefLifeline.inst_has_callbacks>
  30  -live- %r0, %r1
  30  guard_class %r0 -> %i0
  33  getfield_raw_i %i0, FieldDescr<pypy.interpreter.baseobjspace.W_Root_vtable.cls_setweakref> -> %i0
  38  -live- %i0, %r0, %r1
  38  int_guard_value %i0
  40  residual_call_r_v %i0, <IndirectCallTargets>, R[%r0, %r1], <CallDescr(rr) EF=7>
  47  -live- %r1
  47  ref_return %r1
  49  ---
  49  L1:
  49  ref_return %r1
