callPos := base.Pos

		as := ir.NewAssignListStmt(callPos, ir.OAS2, make([]ir.Node, len(argps)), make([]ir.Node, len(argps)))
		for i, argp := range argps {
			arg := *argp

			pos := callPos
			if ir.HasUniquePos(arg) {
				pos = arg.Pos()
			}

			// tmp := arg
			tmp := TempAt(pos, ir.CurFunc, arg.Type())
			init.Append(Stmt(ir.NewDecl(pos, ir.ODCL, tmp)))
			tmp.Defn = as
			as.Lhs[i] = tmp

// that n's position is not unique (e.g., if n is an ONAME).
func (o *orderState) mapKeyTemp(outerPos src.XPos, t *types.Type, n ir.Node) ir.Node {
	pos := outerPos
	if ir.HasUniquePos(n) {
		pos = n.Pos()
	}
	// Most map calls need to take the address of the key.
	// Exception: map*_fast* calls. See golang.org/issue/19015.
	alg := mapfast(t)
	if alg == mapslow {
		return o.addrTemp(n)

func (s *state) expr(n ir.Node) *ssa.Value {
	return s.exprCheckPtr(n, true)
}

func (s *state) exprCheckPtr(n ir.Node, checkPtrOK bool) *ssa.Value {
	if ir.HasUniquePos(n) {
		// ONAMEs and named OLITERALs have the line number
		// of the decl, not the use. See issue 14742.
		s.pushLine(n.Pos())
		defer s.popLine()
	}

	s.stmtList(n.Init())
	switch n.Op() {