PatternRewriter& rewriter) const override {
    auto input_op = op.getArg().getDefiningOp();
    if (auto q = llvm::dyn_cast_or_null<quantfork::QuantizeCastOp>(input_op)) {
      if (!q->getAttr(kVolatileOpAttrName)) return failure();

      if (remove_volatile_ops_type == kPreserveInputsAndOutputs) {
        // Don't remove leading and trailing QDQ for PTQ workflow, so the io
        // modifying lib can work correctly.

                                PatternRewriter& rewriter) const override {
    auto input_op = op.getArg().getDefiningOp();
    if (auto q = llvm::dyn_cast_or_null<quantfork::QuantizeCastOp>(input_op)) {
      if (!q->getAttr(kVolatileOpAttrName)) return failure();

      // If the quantize op is a requantize op, it is being used in other scale
      // adjustments and should be kept. Instead, move dequantize op before the

}

mlir::LogicalResult GetDevicesFromOp(mlir::Operation* op,
                                     mlir::TF::RuntimeDevices* devices) {
  auto devices_attr = op->getAttr(kDevicesAttr);
  if (!devices_attr) return mlir::success();

  if (auto array_attr = mlir::dyn_cast<mlir::ArrayAttr>(devices_attr)) {
    return GetDevicesFromOp(op, array_attr, devices);

		// even if we can't use dest directly.
		return unsafe.Pointer(&_zero)
	}
	return nil
}

// FreeBSD and NetBSD implement their own syscalls to handle extended attributes

func Getxattr(file string, attr string, dest []byte) (sz int, err error) {
	d := initxattrdest(dest, 0)
	destsize := len(dest)

	nsid, a, err := xattrnamespace(attr)
	if err != nil {
		return -1, err
	}

        rewriter.getDenseI64ArrayAttr(kOihwToHwioPermutation));

    // [b, 0, 1, f]x[0, 1, i, o]->[b, 0, 1, f]
    const auto new_dimension_nums = rewriter.getAttr<ConvDimensionNumbersAttr>(
        /*inputBatchDimension=*/0, /*inputFeatureDimension=*/3,
        /*inputSpatialDimensions=*/SmallVector<int64_t>{1, 2},
        /*kernelInputFeatureDimension=*/2, /*kernelOutputFeatureDimension=*/3,

  mlir::OwningOpRef<mlir::ModuleOp> module_ref =
      mlir::ModuleOp::create(mlir::UnknownLoc::get(&context));

  AddDevicesToOp(*module_ref, /*device_set=*/nullptr);
  EXPECT_EQ((*module_ref)->getAttr("tf.devices"), nullptr);
}

TEST(DeviceUtilTest, GetDevicesFromOpNoDevicesAttribute) {
  mlir::MLIRContext context;
  mlir::OwningOpRef<mlir::ModuleOp> module_ref =