// It returns the zero Value if v is nil.
func (v Value) Elem() Value {
	k := v.kind()
	switch k {
	case abi.Interface:
		var eface any
		if v.typ().NumMethod() == 0 {
			eface = *(*any)(v.ptr)
		} else {
			eface = (any)(*(*interface {
				M()
			})(v.ptr))
		}
		x := unpackEface(eface)
		if x.flag != 0 {
			x.flag |= v.flag.ro()
		}
		return x
	case abi.Pointer:
		ptr := v.ptr

func arena_arena_New(arena unsafe.Pointer, typ any) any {
	t := (*_type)(efaceOf(&typ).data)
	if t.Kind_&abi.KindMask != abi.Pointer {
		throw("arena_New: non-pointer type")
	}
	te := (*ptrtype)(unsafe.Pointer(t)).Elem
	x := ((*userArena)(arena)).new(te)
	var result any
	e := efaceOf(&result)
	e._type = t
	e.data = x
	return result
}

		return
	}

	ep := efaceOf(&ptr)
	t := ep._type

	top := true
	if arg != nil && (t.Kind_&abi.KindMask == abi.Pointer || t.Kind_&abi.KindMask == abi.UnsafePointer) {
		p := ep.data
		if t.Kind_&abi.KindDirectIface == 0 {
			p = *(*unsafe.Pointer)(p)
		}
		if p == nil || !cgoIsGoPointer(p) {
			return
		}
		aep := efaceOf(&arg)
		switch aep._type.Kind_ & abi.KindMask {

func printstring(s string) {
	gwrite(bytes(s))
}

func printslice(s []byte) {
	sp := (*slice)(unsafe.Pointer(&s))
	print("[", len(s), "/", cap(s), "]")
	printpointer(sp.array)
}

func printeface(e eface) {
	print("(", e._type, ",", e.data, ")")
}

func printiface(i iface) {
	print("(", i.tab, ",", i.data, ")")
}

// hexdumpWords prints a word-oriented hex dump of [p, end).
//

	const struct __go_type_descriptor *__type_descriptor;
	void *__object;
} Eface;

extern void runtimeCgoCheckPointer(Eface, Eface)
	__asm__("runtime.cgoCheckPointer")
	__attribute__((weak));

extern void localCgoCheckPointer(Eface, Eface)
	__asm__("GCCGOSYMBOLPREF._cgoCheckPointer");

void localCgoCheckPointer(Eface ptr, Eface arg) {
	if(runtimeCgoCheckPointer) {
		runtimeCgoCheckPointer(ptr, arg);
	}

		nan := math.NaN()
		for i := 0; i < n; i++ {
			m[nan] = 1
		}
		if len(m) != n {
			panic("wrong size map after nan insertion")
		}
	})

	// ~6ms on a 1.6GHz Zeon.
	checkLinear("eface", 10000, func(n int) {
		m := map[interface{}]int{}
		for i := 0; i < n; i++ {
			m[i] = 1
		}
	})

	// ~7ms on a 1.6GHz Zeon.
	// Regression test for CL 119360043.
	checkLinear("iface", 10000, func(n int) {

// must be stored in interfaces indirectly. See issue 42076.
func (pd *pollDesc) makeArg() (i any) {
	x := (*eface)(unsafe.Pointer(&i))
	x._type = pdType
	x.data = unsafe.Pointer(&pd.self)
	return
}

var (
	pdEface any    = (*pollDesc)(nil)
	pdType  *_type = efaceOf(&pdEface)._type

		}
	}

	return
}

var methodValueCallFrameObjs [1]stackObjectRecord // initialized in stackobjectinit

func stkobjinit() {
	var abiRegArgsEface any = abi.RegArgs{}
	abiRegArgsType := efaceOf(&abiRegArgsEface)._type
	if abiRegArgsType.Kind_&abi.KindGCProg != 0 {
		throw("abiRegArgsType needs GC Prog, update methodValueCallFrameObjs")
	}
	// Set methodValueCallFrameObjs[0].gcdataoff so that

	base.AssertfAt(dst.IsInterface(), n.Pos(), "want interface type, have %L", n)
	if hasRType(n, n.TypeWord, "TypeWord") {
		return n.TypeWord
	}
	if dst.IsEmptyInterface() {
		return concreteRType(pos, src) // direct eface construction
	}
	if !src.IsInterface() {
		return ITabAddrAt(pos, src, dst) // direct iface construction
	}
	return TypePtrAt(pos, dst) // convI2I
}

// ConvIfaceSrcRType asserts that n is a conversion from

type funcval struct {
	fn uintptr
	// variable-size, fn-specific data here
}

type iface struct {
	tab  *itab
	data unsafe.Pointer
}

type eface struct {
	_type *_type
	data  unsafe.Pointer
}

func efaceOf(ep *any) *eface {
	return (*eface)(unsafe.Pointer(ep))
}

// The guintptr, muintptr, and puintptr are all used to bypass write barriers.