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.
		target = s.load(byteptr, s.newValue1I(ssa.OpOffPtr, byteptr, rttype.ITab.OffsetOf("Type"), targetItab))
	} else {
		target = s.expr(n.RType)
	}