// Maximum key or elem size to keep inline (instead of mallocing per element).
	// Must fit in a uint8.
	// Note: fast map functions cannot handle big elems (bigger than MapMaxElemBytes).
	MapMaxKeyBytes  = 128
	MapMaxElemBytes = 128 // Must fit in a uint8.

var mapaccess2 = mkmapnames("mapaccess2", "")
var mapassign = mkmapnames("mapassign", "ptr")
var mapdelete = mkmapnames("mapdelete", "")

func mapfast(t *types.Type) int {
	if t.Elem().Size() > abi.MapMaxElemBytes {
		return mapslow
	}
	switch reflectdata.AlgType(t.Key()) {
	case types.AMEM32:
		if !t.Key().HasPointers() {
			return mapfast32
		}
		if types.PtrSize == 4 {
			return mapfast32ptr
		}

		t.Key.Size_ <= abi.MapMaxKeyBytes && (t.IndirectKey() || t.KeySize != uint8(t.Key.Size_)) {
		throw("key size wrong")
	}
	if t.Elem.Size_ > abi.MapMaxElemBytes && (!t.IndirectElem() || t.ValueSize != uint8(goarch.PtrSize)) ||
		t.Elem.Size_ <= abi.MapMaxElemBytes && (t.IndirectElem() || t.ValueSize != uint8(t.Elem.Size_)) {
		throw("elem size wrong")
	}
	if t.Key.Align_ > abi.MapBucketCount {
		throw("key align too big")

		if len(k.s) != 1 {
			t.Errorf("len(k.s) == %d, want 1", len(k.s))
		}
	}
}

func TestMapValues(t *testing.T) {
	type val struct {
		s   string
		pad [128]byte // sizeof(val) > abi.MapMaxElemBytes
	}
	m := map[int]val{1: {s: "a"}, 2: {s: "b"}}
	vals := make([]val, 0, len(m))
	runtime.MapValues(m, unsafe.Pointer(&vals))
	for _, v := range vals {
		if len(v.s) != 1 {

	}
	mt.Flags = 0
	if ktyp.Size_ > abi.MapMaxKeyBytes {
		mt.KeySize = uint8(goarch.PtrSize)
		mt.Flags |= 1 // indirect key
	} else {
		mt.KeySize = uint8(ktyp.Size_)
	}
	if etyp.Size_ > abi.MapMaxElemBytes {
		mt.ValueSize = uint8(goarch.PtrSize)
		mt.Flags |= 2 // indirect value
	} else {
		mt.MapType.ValueSize = uint8(etyp.Size_)
	}
	mt.MapType.BucketSize = uint16(mt.Bucket.Size_)

	// behavior for structs, which allow read but not write
	// of unexported fields.

	var e unsafe.Pointer
	if (tt.Key == stringType || key.kind() == String) && tt.Key == key.typ() && tt.Elem.Size() <= abi.MapMaxElemBytes {
		k := *(*string)(key.ptr)
		e = mapaccess_faststr(v.typ(), v.pointer(), k)
	} else {
		key = key.assignTo("reflect.Value.MapIndex", tt.Key, nil)
		var k unsafe.Pointer
		if key.flag&flagIndir != 0 {

		// compute size info like hashmap.c does.
		indirectKey, indirectVal := false, false
		if keysize > abi.MapMaxKeyBytes {
			keysize = int64(d.arch.PtrSize)
			indirectKey = true
		}
		if valsize > abi.MapMaxElemBytes {
			valsize = int64(d.arch.PtrSize)
			indirectVal = true
		}

		// Construct type to represent an array of BucketSize keys
		keyname := d.nameFromDIESym(keytype)