// See comment in cmd/compile/internal/walk/convert.go:walkConvInterface
			return false
		}

		reflectdata.MarkTypeUsedInInterface(val.Type(), l.Linksym())

		var itab *ir.AddrExpr
		if typ.IsEmptyInterface() {
			itab = reflectdata.TypePtrAt(base.Pos, val.Type())
		} else {
			itab = reflectdata.ITabAddrAt(base.Pos, val.Type(), typ)
		}

		// Create a copy of l to modify while we emit data.

	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.

		nn.Args[i] = n
		if n.Type() == nil || n.Type().Kind() == types.TFORW {
			continue
		}

		var on *ir.Name
		switch n.Type().Kind() {
		case types.TINTER:
			if n.Type().IsEmptyInterface() {
				on = typecheck.LookupRuntime("printeface", n.Type())
			} else {
				on = typecheck.LookupRuntime("printiface", n.Type())
			}
		case types.TPTR:
			if n.Type().Elem().NotInHeap() {