return rewriteValueS390X_OpAdd32F(v)
	case OpAdd64:
		v.Op = OpS390XADD
		return true
	case OpAdd64F:
		return rewriteValueS390X_OpAdd64F(v)
	case OpAdd8:
		v.Op = OpS390XADDW
		return true
	case OpAddPtr:
		v.Op = OpS390XADD
		return true
	case OpAddr:
		return rewriteValueS390X_OpAddr(v)
	case OpAnd16:
		v.Op = OpS390XANDW
		return true
	case OpAnd32:
		v.Op = OpS390XANDW
		return true
	case OpAnd64:

//   net.IP:     24 byte slice header + {4, 16} = 28 to 40 bytes
//   net.IPAddr: 40 byte slice header + {4, 16} = 44 to 56 bytes + zone length
//   netip.Addr: 24 bytes (zone is per-name singleton, shared across all users)

// Addr represents an IPv4 or IPv6 address (with or without a scoped
// addressing zone), similar to [net.IP] or [net.IPAddr].
//
// Unlike [net.IP] or [net.IPAddr], Addr is a comparable value

pkg net, method (*Resolver) LookupCNAME(context.Context, string) (string, error)
pkg net, method (*Resolver) LookupHost(context.Context, string) ([]string, error)
pkg net, method (*Resolver) LookupIPAddr(context.Context, string) ([]IPAddr, error)
pkg net, method (*Resolver) LookupMX(context.Context, string) ([]*MX, error)
pkg net, method (*Resolver) LookupNS(context.Context, string) ([]*NS, error)

type linkname struct {
	pos    syntax.Pos
	local  string
	remote string
}

var unOps = [...]ir.Op{
	syntax.Recv: ir.ORECV,
	syntax.Mul:  ir.ODEREF,
	syntax.And:  ir.OADDR,

	syntax.Not: ir.ONOT,
	syntax.Xor: ir.OBITNOT,
	syntax.Add: ir.OPLUS,
	syntax.Sub: ir.ONEG,
}

var binOps = [...]ir.Op{
	syntax.OrOr:   ir.OOROR,
	syntax.AndAnd: ir.OANDAND,

		n := n.(*ir.UnaryExpr)
		n.X = walkExpr(n.X, init)
		return n

	case ir.ODOTMETH, ir.ODOTINTER:
		n := n.(*ir.SelectorExpr)
		n.X = walkExpr(n.X, init)
		return n

	case ir.OADDR:
		n := n.(*ir.AddrExpr)
		n.X = walkExpr(n.X, init)
		return n

	case ir.ODEREF:
		n := n.(*ir.StarExpr)
		n.X = walkExpr(n.X, init)
		return n

				}
				if addr.IP.To16() != nil && addr.IP.To4() == nil {
					// netsh does not output netmask for ipv6, so ignore ipv6 mask
					have = append(have, addr.IP.String())
				}
			case *IPAddr:
				if addr.IP.To4() != nil {
					have = append(have, addr.String())
				}
				if addr.IP.To16() != nil && addr.IP.To4() == nil {
					// netsh does not output netmask for ipv6, so ignore ipv6 mask

	if err != nil {
		return false, err
	}
	for _, ifi := range ift {
		ifmat, err := ifi.MulticastAddrs()
		if err != nil {
			return false, err
		}
		for _, ifma := range ifmat {
			if ifma.(*IPAddr).IP.Equal(ip) {
				return true, nil
			}
		}
	}
	return false, nil
}

// Issue 21856.
func TestClosingListener(t *testing.T) {
	ln := newLocalListener(t, "tcp")
	addr := ln.Addr()

		v.Op = OpARMADDS
		return true
	case OpAdd32withcarry:
		v.Op = OpARMADC
		return true
	case OpAdd64F:
		v.Op = OpARMADDD
		return true
	case OpAdd8:
		v.Op = OpARMADD
		return true
	case OpAddPtr:
		v.Op = OpARMADD
		return true
	case OpAddr:
		return rewriteValueARM_OpAddr(v)
	case OpAnd16:
		v.Op = OpARMAND
		return true
	case OpAnd32:
		v.Op = OpARMAND
		return true
	case OpAnd8:

				// TODO: why isn't this OTYPE to begin with?
				dt := n1.(*ir.DynamicType)
				if dt.RType != nil && dt.RType.Op() == ir.OADDR {
					addr := dt.RType.(*ir.AddrExpr)
					if addr.X.Op() == ir.OLINKSYMOFFSET {
						n1 = ir.TypeNode(n1.Type())
					}
				}
				if dt.ITab != nil && dt.ITab.Op() == ir.OADDR {
					addr := dt.ITab.(*ir.AddrExpr)
					if addr.X.Op() == ir.OLINKSYMOFFSET {
						n1 = ir.TypeNode(n1.Type())
					}

			default:
				panic("unknown dnsmessage type")
			}

			return r, nil
		},
	}

	r := &Resolver{PreferGo: true, Dial: fake.DialContext}

	methodTests := []string{"CNAME", "Host", "IP", "IPAddr", "MX", "NS", "NetIP", "SRV", "TXT"}
	query := func(t string, req string) error {
		switch t {
		case "CNAME":
			_, err := r.LookupCNAME(context.Background(), req)
			return err
		case "Host":