   0  getfield_gc_r %r0, FieldDescr<pypy.module.__pypy__.interp_builders.W_UnicodeBuilder.inst_builder> -> %r0
   5  getfield_gc_i %r0, FieldDescr<rpython.rlib.rutf8.Utf8StringBuilder.inst__lgt> -> %i0
  10  new_with_vtable <rpython.jit.backend.llsupport.descr.SizeDescr object at 0x0000aaab01c05398> -> %r0
  14  setfield_gc_i %r0, %i0, FieldDescr<pypy.objspace.std.intobject.W_IntObject.inst_intval>
  19  ref_return %r0
