   0  residual_call_irf_r $<* fn fromfloat>, I[], R[], F[%f0], <CallDescr(f) EF=4> -> %r0
   9  -live- %r0
   9  new_with_vtable <rpython.jit.backend.llsupport.descr.SizeDescr object at 0x10095226dd0> -> %r1
  13  setfield_gc_r %r1, %r0, FieldDescr<pypy.objspace.std.longobject.W_LongObject.inst_num>
  18  ref_return %r1
