// the special ".closureptr" var for rangefunc bodies.
	params := []abi.ABIParamAssignment{}
	for _, inp := range pri.InParams() {
		if !isNamedRegParam(inp) {
			// will be sorted out elsewhere
			continue
		}
		addVarSlot(inp.Name, inp.Type)
		params = append(params, inp)
	}
	if needCloCtx {
		addVarSlot(f.CloSlot, f.CloSlot.Type())
		cloAssign := abi.ABIParamAssignment{