return %cluster : tensor<i32>
    }
    ```

    will be transformed into:

    ```mlir
    func @computation(%arg0: tensor<i32>) -> tensor<i32> {
      %cluster = "tf_device.cluster_func"(%arg0) {func = @_func} : (tensor<i32>) -> tensor<i32>
      return %cluster : tensor<i32>
    }

    func @_func(%arg0: tensor<i32>) -> tensor<i32> {
      %identity = "tf.Identity"(%arg0) : (tensor<i32>) -> tensor<i32>

		// Run multiple times to shake out data races
		t.Run("goroutine launches", testLaunches)
	}
}

func BenchmarkGoroutine(b *testing.B) {
	withIdle := func(n int, fn func(b *testing.B)) func(b *testing.B) {
		return func(b *testing.B) {
			c := make(chan int)
			var ready, done sync.WaitGroup
			defer func() {
				close(c)
				done.Wait()
			}()

			for i := 0; i < n; i++ {
				ready.Add(1)

	}
	if s.CFunc() {
		fmt.Fprintf(ctxt.Bso, "cfunc ")
	}
	if s.NoSplit() {
		fmt.Fprintf(ctxt.Bso, "nosplit ")
	}
	if s.Func() != nil && s.Func().FuncFlag&abi.FuncFlagTopFrame != 0 {
		fmt.Fprintf(ctxt.Bso, "topframe ")
	}
	if s.Func() != nil && s.Func().FuncFlag&abi.FuncFlagAsm != 0 {
		fmt.Fprintf(ctxt.Bso, "asm ")
	}
	fmt.Fprintf(ctxt.Bso, "size=%d", s.Size)
	if s.Type == objabi.STEXT {

	tg.tempFile("src/t/t2/t2_test.go", "package t\nimport _ \"p1\"\nimport \"testing\"\nfunc Test2(*testing.T) {}\n")
	tg.tempFile("src/t/t3/t3_test.go", "package t\nimport \"p1\"\nimport \"testing\"\nfunc Test3(t *testing.T) {t.Log(p1.X)}\n")
	tg.tempFile("src/t/t4/t4_test.go", "package t\nimport \"p2\"\nimport \"testing\"\nfunc Test4(t *testing.T) {t.Log(p2.X)}")

	rfunc := types2.CoreType(rclause.X.GetTypeInfo().Type).(*types2.Signature) // type of X - func(func(...)bool)
	if rfunc.Params().Len() != 1 {
		base.Fatalf("invalid typecheck of range func")
	}
	ftyp := types2.CoreType(rfunc.Params().At(0).Type()).(*types2.Signature) // func(...) bool
	if ftyp.Results().Len() != 1 {
		base.Fatalf("invalid typecheck of range func")
	}

	// Build X(bodyFunc)

func (a *Attribute) DuplicateOK() bool        { return a.load()&AttrDuplicateOK != 0 }
func (a *Attribute) MakeTypelink() bool       { return a.load()&AttrMakeTypelink != 0 }
func (a *Attribute) CFunc() bool              { return a.load()&AttrCFunc != 0 }
func (a *Attribute) NoSplit() bool            { return a.load()&AttrNoSplit != 0 }
func (a *Attribute) Leaf() bool               { return a.load()&AttrLeaf != 0 }

  switch (value.value_case()) {
    case AttrValue::kFunc: {
      // TODO(b/156546237): Unify kFunc/NameAttrList attribute representation.
      // Currently kFunc/NameAttrList attributes in a kList/repeated AttrValue
      // will not use this representation.
      mlir::NamedAttrList attrs;
      for (const auto& func_attr : value.func().attr()) {
        TF_ASSIGN_OR_RETURN(auto attr,

	},
	{struct {
		x struct {
			f func(args ...int)
		}
	}{},
		"struct { f func(...int) }",
	},
	{struct {
		x (interface {
			a(func(func(int) int) func(func(int)) int)
			b()
		})
	}{},
		"interface { reflect_test.a(func(func(int) int) func(func(int)) int); reflect_test.b() }",
	},
	{struct {
		x struct {
			int32
			int64
		}

      break;

    case tensorflow::AttrValue::kFunc:
      *list_size = -1;
      *total_size = -1;
      break;

    case tensorflow::AttrValue::VALUE_NOT_SET:
      status->status = absl::InvalidArgumentError(
          absl::StrCat("Attribute '", attr_name, "' has no value set"));
      break;
  }
}

#define DEFINE_TF_GETATTR(func, c_type, cc_type, attr_type, list_field)        \

	} else {
		return
	}
	obj.Nopout(p)
}

func preprocess(ctxt *obj.Link, cursym *obj.LSym, newprog obj.ProgAlloc) {
	// TODO(minux): add morestack short-cuts with small fixed frame-size.
	if cursym.Func().Text == nil || cursym.Func().Text.Link == nil {
		return
	}

	c := ctxt9{ctxt: ctxt, cursym: cursym, newprog: newprog}

	p := c.cursym.Func().Text
	textstksiz := p.To.Offset
	if textstksiz == -8 {