def OptimizePow2ToSqrt : Pat<
  (TFL_PowOp $input,
    (Arith_ConstantOp ConstantAttr<RankedF32ElementsAttr<[]>, "0.5f">)),
  (TFL_SqrtOp $input)>;

// Optimize X^(-1/2) to 1/√X == rsqrt(x)
def OptimizePow2ToRsqrt : Pat<
  (TFL_PowOp $input,
    (Arith_ConstantOp ConstantAttr<RankedF32ElementsAttr<[]>, "-0.5f">)),
  (TFL_RsqrtOp $input)>;

def CanOptimizeIdentityGatherNdOrScatterNdOp : Constraint<CPred<

    }

    private class OwnServices implements ServiceProvider {
        private final Map<Class<?>, List<ServiceProvider>> providersByType = new HashMap<Class<?>, List<ServiceProvider>>(16, 0.5f);
        private final CompositeStoppable stoppable = CompositeStoppable.stoppable();
        private final List<SingletonService> services = new ArrayList<SingletonService>();

TEST(XlaCompilationTest, ConstOp) {
  // valid data type
  {
    std::unique_ptr<Graph> graph(new Graph(OpRegistry::Global()));
    Scope root = Scope::NewRootScope().ExitOnError();
    auto c = ops::Const(root.WithOpName("const"), 0.5f);
    c.node()->AddAttr(kXlaCompileAttr, true);
    TF_ASSERT_OK(root.ToGraph(graph.get()));
    TF_ASSERT_OK(MarkForCompilationPassTestHelper::MarkForCompilation(&graph));
    EXPECT_EQ(1, GetClusters(*graph).size());
  }

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