if n.Type() == nil {
			continue
		}
		as[i] = AssignConv(n, t.Elem(), "append")
		types.CheckSize(as[i].Type()) // ensure width is calculated for backend
	}
	return n
}

// tcClear typechecks an OCLEAR node.
func tcClear(n *ir.UnaryExpr) ir.Node {
	n.X = Expr(n.X)
	n.X = DefaultLit(n.X, nil)
	l := n.X
	t := l.Type()
	if t == nil {
		n.SetType(nil)
		return n
	}

	switch {

	case ir.OREAL, ir.OIMAG:
		n := n.(*ir.UnaryExpr)
		return tcRealImag(n)

	case ir.OCOMPLEX:
		n := n.(*ir.BinaryExpr)
		return tcComplex(n)

	case ir.OCLEAR:
		n := n.(*ir.UnaryExpr)
		return tcClear(n)

	case ir.OCLOSE:
		n := n.(*ir.UnaryExpr)
		return tcClose(n)

	case ir.ODELETE:
		n := n.(*ir.CallExpr)
		return tcDelete(n)

	case ir.OAPPEND:

package main

import "math"

func checkClearSlice() {
	s := []int{1, 2, 3}
	clear(s)
	for i := range s {
		if s[i] != 0 {
			panic("clear not zeroing slice elem")
		}
	}

	clear([]int{})
}

func checkClearMap() {
	m1 := make(map[int]int)
	m1[0] = 0
	m1[1] = 1
	clear(m1)
	if len(m1) != 0 {
		panic("m1 is not cleared")
	}

	// map contains NaN keys is also cleared.

		p = pp.Append(p, s390x.ACLEAR, obj.TYPE_CONST, 0, 256, obj.TYPE_MEM, reg, off)
		pl := p
		p = pp.Append(p, s390x.AADD, obj.TYPE_CONST, 0, 256, obj.TYPE_REG, reg, 0)
		p = pp.Append(p, s390x.ABRCTG, obj.TYPE_REG, ireg, 0, obj.TYPE_BRANCH, 0, 0)
		p.To.SetTarget(pl)
		cnt = cnt % 256
	}

	// Generate remaining clear instructions without a loop.
	for cnt > 0 {
		n := cnt

      started = true
      for (server in servers.values) {
        server.start()
      }
    }

    fun shutdownAll() {
      try {
        val toClear = servers.values.toList()
        servers.clear()
        for (server in toClear) {
          server.shutdown()
        }
      } catch (e: IOException) {
        logger.log(Level.WARNING, "MockWebServer shutdown failed", e)
      }
    }
  }

	okforlen   [types.NTYPE]bool
	okforarith [types.NTYPE]bool
)

var builtinFuncs = [...]struct {
	name string
	op   ir.Op
}{
	{"append", ir.OAPPEND},
	{"cap", ir.OCAP},
	{"clear", ir.OCLEAR},
	{"close", ir.OCLOSE},
	{"complex", ir.OCOMPLEX},
	{"copy", ir.OCOPY},
	{"delete", ir.ODELETE},
	{"imag", ir.OIMAG},
	{"len", ir.OLEN},
	{"make", ir.OMAKE},
	{"max", ir.OMAX},
	{"min", ir.OMIN},

		// arg1 should be src+size,
		//
		// clear: CLEAR $256, 0(R1)
		//        MOVD  $256(R1), R1
		//        CMP   R1, Rarg1
		//        BNE   clear
		//        CLEAR $rem, 0(R1) // if rem > 0
		// arg1 is the last address to zero in the loop + 256
		clear := s.Prog(s390x.ACLEAR)
		clear.From.Type = obj.TYPE_CONST
		clear.From.Offset = 256
		clear.To.Type = obj.TYPE_MEM
		clear.To.Reg = v.Args[0].Reg()

var predeclaredFuncs = [...]struct {
	name     string
	nargs    int
	variadic bool
	kind     exprKind
}{
	_Append:  {"append", 1, true, expression},
	_Cap:     {"cap", 1, false, expression},
	_Clear:   {"clear", 1, false, statement},
	_Close:   {"close", 1, false, statement},
	_Complex: {"complex", 2, false, expression},
	_Copy:    {"copy", 2, false, statement},
	_Delete:  {"delete", 2, false, statement},

var predeclaredFuncs = [...]struct {
	name     string
	nargs    int
	variadic bool
	kind     exprKind
}{
	_Append:  {"append", 1, true, expression},
	_Cap:     {"cap", 1, false, expression},
	_Clear:   {"clear", 1, false, statement},
	_Close:   {"close", 1, false, statement},
	_Complex: {"complex", 2, false, expression},
	_Copy:    {"copy", 2, false, statement},
	_Delete:  {"delete", 2, false, statement},

	bad(func() { clear(Field(v, 4)) })                     // .NamedT2
	bad(func() { clear(Field(Field(v, 4), 0)) })           // .NamedT2.Z
	bad(func() { clear(Field(Field(v, 4), 1)) })           // .NamedT2.namedT0
	bad(func() { clear(Field(Field(Field(v, 4), 1), 0)) }) // .NamedT2.namedT0.W
	bad(func() { clear(Field(v, 5)) })                     // .namedT1
	bad(func() { clear(Field(Field(v, 5), 0)) })           // .namedT1.Y