   0  inline_call_ir_r <JitCode '_run_forking_function'>, I[$'F'], R[] -> %r0
   7  -live- %r0
   7  getfield_gc_i_pure %r0, FieldDescr<tuple2.item0> -> %i0
  12  new_with_vtable <rpython.jit.backend.llsupport.descr.SizeDescr object at 0x100951d1e10> -> %r0
  16  setfield_gc_i %r0, %i0, FieldDescr<pypy.objspace.std.intobject.W_IntObject.inst_intval>
  21  ref_return %r0
