var value ir.Node
	switch {
	case fromType.Size() == 0:
		// n is zero-sized. Use zerobase.
		cheapExpr(n, init) // Evaluate n for side-effects. See issue 19246.
		value = ir.NewLinksymExpr(base.Pos, ir.Syms.Zerobase, types.Types[types.TUINTPTR])
	case isBool || fromType.Size() == 1 && isInteger:
		// n is a bool/byte. Use staticuint64s[n * 8] on little-endian
		// and staticuint64s[n * 8 + 7] on big-endian.

		name := fn.Nname
		abi := fn.ABI
		if abi != wantABI {
			base.ErrorfAt(pos, 0, "internal/abi.FuncPC%s expects an %v function, %s is defined as %v", wantABI, wantABI, name.Sym().Name, abi)
		}
		var e Node = NewLinksymExpr(pos, name.LinksymABI(abi), types.Types[types.TUINTPTR])
		e = NewAddrExpr(pos, e)
		e.SetType(types.Types[types.TUINTPTR].PtrTo())
		e = NewConvExpr(pos, OCONVNOP, types.Types[types.TUINTPTR], e)
		e.SetTypecheck(1)

}

// LinksymAddr returns a new expression that evaluates to the address
// of lsym. typ specifies the type of the addressed memory.
func LinksymAddr(pos src.XPos, lsym *obj.LSym, typ *types.Type) *ir.AddrExpr {
	n := ir.NewLinksymExpr(pos, lsym, typ)
	return Expr(NodAddrAt(pos, n)).(*ir.AddrExpr)
}

func NodNil() ir.Node {
	return ir.NewNilExpr(base.Pos, types.Types[types.TNIL])
}

// AddImplicitDots finds missing fields in obj.field that