n := name.N
	u := types.Types[types.TUINTPTR]
	t := types.NewPtr(types.Types[types.TUINT8])
	// Split this interface up into two separate variables.
	sfx := ".itab"
	if n.Type().IsEmptyInterface() {
		sfx = ".type"
	}
	c := f.SplitSlot(name, sfx, 0, u) // see comment in typebits.Set
	d := f.SplitSlot(name, ".data", u.Size(), t)
	return c, d
}

	iface := s.expr(n.X)
	var source, target, targetItab *ssa.Value
	if n.SrcRType != nil {
		source = s.expr(n.SrcRType)
	}
	if !n.X.Type().IsEmptyInterface() && !n.Type().IsInterface() {
		byteptr := s.f.Config.Types.BytePtr
		targetItab = s.expr(n.ITab)
		// TODO(mdempsky): Investigate whether compiling n.RType could be
		// better than loading itab.typ.