if v.Aux == nil {
		return
	}
	// Add symbol's offset from its base register.
	switch n := v.Aux.(type) {
	case *ssa.AuxCall:
		a.Name = obj.NAME_EXTERN
		a.Sym = n.Fn
	case *obj.LSym:
		a.Name = obj.NAME_EXTERN
		a.Sym = n
	case *ir.Name:
		if n.Class == ir.PPARAM || (n.Class == ir.PPARAMOUT && !n.IsOutputParamInRegisters()) {
			a.Name = obj.NAME_PARAM
		} else {