if (!matchPattern(constant_val, m_Constant(&added_value))) return failure();

    // Check the add op is applied to begin.
    mlir::TypedValue<::mlir::TensorType> begin_tensor =
        strided_slice_op.getBegin();
    mlir::TypedValue<::mlir::TensorType> add_source_tensor =
        add_op ? add_op.getLhs() : sub_op.getLhs();
    if (begin_tensor != add_source_tensor) {
      return failure();
    }

  LogicalResult matchAndRewrite(TF::SliceOp op,
                                PatternRewriter &rewriter) const override {
    Location loc = op.getLoc();
    Value input = op.getInput();
    Value begin_indices = op.getBegin();
    Value sizes = op.getSize();

    auto input_ty = mlir::dyn_cast<RankedTensorType>(input.getType());
    auto begin_type = mlir::dyn_cast<RankedTensorType>(begin_indices.getType());

      // each region and the use of TensorList returned using YieldOp.
      if (auto while_region = llvm::dyn_cast<WhileRegionOp>(use.getOwner())) {
        DCOMMENT("\tTL WhileRegion");
        for (auto branch : while_region.getRegions())
          add_to_worklist(branch->getArgument(use.getOperandNumber()));
        continue;
      }
      if (auto yield = llvm::dyn_cast<YieldOp>(use.getOwner())) {
        Operation* parent = yield->getParentOp();

func newTestConfig(bucketLocation string, obj ObjectLayer) (err error) {
	// Initialize server config.
	if err = newSrvConfig(obj); err != nil {
		return err
	}

	// Set a default region.
	config.SetRegion(globalServerConfig, bucketLocation)

	applyDynamicConfigForSubSys(context.Background(), obj, globalServerConfig, config.StorageClassSubSys)

	// Save config.