   0  residual_call_r_r $<* fn W_ZipCache.keys>, R[%r0], <CallDescr(r) EF=7> -> %r0
   7  -live- %r0
  10  guard_class %r0 -> %i0
  13  getfield_raw_i %i0, FieldDescr<pypy.interpreter.baseobjspace.W_Root_vtable.cls_shortcut___iter__> -> %i0
  18  -live- %i0, %r0
  21  int_guard_value %i0
  23  residual_call_r_r %i0, <IndirectCallTargets>, R[%r0], <CallDescr(r) EF=7> -> %r0
  30  -live- %r0
  33  ref_return %r0
