init.Append(mkcall1(fn, nil, init, unsafePtr, typecheck.Conv(len, lenType)))
	} else {
		// Otherwise, open code unsafe.String to prevent runtime call overhead.
		// Keep this code in sync with runtime.unsafestring{,64}
		if len.Type().IsKind(types.TIDEAL) || len.Type().Size() <= types.Types[types.TUINT].Size() {
			lenType = types.Types[types.TINT]
		} else {
			// len64 := int64(len)
			// if int64(int(len64)) != len64 {

	var tmp xlMetaV2Version
	for zb0001 > 0 {
		zb0001--
		field, bts, err = msgp.ReadMapKeyZC(bts)
		if err != nil {
			return msgp.WrapError(err, "loadLegacy.ReadMapKey")
		}
		switch msgp.UnsafeString(field) {
		case "Versions":
			var zb0002 uint32
			zb0002, bts, err = msgp.ReadArrayHeaderBytes(bts)
			if err != nil {
				return msgp.WrapError(err, "Versions")
			}

	{"recover", ir.ORECOVER},
}

var unsafeFuncs = [...]struct {
	name string
	op   ir.Op
}{
	{"Add", ir.OUNSAFEADD},
	{"Slice", ir.OUNSAFESLICE},
	{"SliceData", ir.OUNSAFESLICEDATA},
	{"String", ir.OUNSAFESTRING},
	{"StringData", ir.OUNSAFESTRINGDATA},
}

// InitUniverse initializes the universe block.
func InitUniverse() {
	types.InitTypes(func(sym *types.Sym, typ *types.Type) types.Object {

			}
			u := ir.NewUnaryExpr(n.Pos(), l.BuiltinOp, arg)
			return typecheck(ir.InitExpr(n.Init(), u), top) // typecheckargs can add to old.Init

		case ir.OCOMPLEX, ir.OCOPY, ir.OUNSAFEADD, ir.OUNSAFESLICE, ir.OUNSAFESTRING:
			typecheckargs(n)
			arg1, arg2, ok := needTwoArgs(n)
			if !ok {
				n.SetType(nil)
				return n
			}
			b := ir.NewBinaryExpr(n.Pos(), l.BuiltinOp, arg1, arg2)

		ir.OMIN,
		ir.ONEW,
		ir.OPANIC,
		ir.OPRINT,
		ir.OPRINTLN,
		ir.OREAL,
		ir.ORECOVER,
		ir.ORECOVERFP,
		ir.ORECV,
		ir.OUNSAFEADD,
		ir.OUNSAFESLICE,
		ir.OUNSAFESLICEDATA,
		ir.OUNSAFESTRING,
		ir.OUNSAFESTRINGDATA:
		return true
	}
	return false

	OSEND:             "<-",
	OSUB:              "-",
	OSWITCH:           "switch",
	OUNSAFEADD:        "unsafe.Add",
	OUNSAFESLICE:      "unsafe.Slice",
	OUNSAFESLICEDATA:  "unsafe.SliceData",
	OUNSAFESTRING:     "unsafe.String",
	OUNSAFESTRINGDATA: "unsafe.StringData",
	OXOR:              "^",
}

// GoString returns the Go syntax for the Op, or else its name.
func (o Op) GoString() string {

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

	case ir.OUNSAFESLICE:
		n := n.(*ir.BinaryExpr)
		return walkUnsafeSlice(n, init)

	case ir.OUNSAFESTRING:
		n := n.(*ir.BinaryExpr)
		return walkUnsafeString(n, init)

	case ir.OUNSAFESTRINGDATA, ir.OUNSAFESLICEDATA:
		n := n.(*ir.UnaryExpr)
		return walkUnsafeData(n, init)

	case ir.ODOT, ir.ODOTPTR:

		return tcUnsafeAdd(n)

	case ir.OUNSAFESLICE:
		n := n.(*ir.BinaryExpr)
		return tcUnsafeSlice(n)

	case ir.OUNSAFESLICEDATA:
		n := n.(*ir.UnaryExpr)
		return tcUnsafeData(n)

	case ir.OUNSAFESTRING:
		n := n.(*ir.BinaryExpr)
		return tcUnsafeString(n)

	case ir.OUNSAFESTRINGDATA:
		n := n.(*ir.UnaryExpr)
		return tcUnsafeData(n)

	case ir.OITAB:
		n := n.(*ir.UnaryExpr)