Deprecated and replace cub::AlignBytes (#8118)

Author: bernhardmgruber

cub/cub/agent/agent_histogram.cuh

@@ -636,8 +636,8 @@ struct AgentHistogram
     OffsetT num_row_pixels, OffsetT num_rows, OffsetT row_stride_samples, int tiles_per_row, GridQueue<int> tile_queue)
   {
     // Check whether all row starting offsets are vec-aligned (in single-channel) or pixel-aligned (in multi-channel)
-    constexpr int vec_mask   = AlignBytes<VecT>::ALIGN_BYTES - 1;
-    constexpr int pixel_mask = AlignBytes<PixelT>::ALIGN_BYTES - 1;
+    constexpr int vec_mask   = alignof(VecT) - 1;
+    constexpr int pixel_mask = alignof(PixelT) - 1;
     const size_t row_bytes   = sizeof(SampleT) * row_stride_samples;
 
     const bool vec_aligned_rows =

cub/cub/util_type.cuh

@@ -300,6 +300,8 @@ private:
  * Size and alignment
  ******************************************************************************/
 
+namespace detail
+{
 /// Structure alignment
 template <typename T>
 struct AlignBytes
@@ -375,17 +377,21 @@ template <typename T> struct AlignBytes<volatile T> : AlignBytes<T> {};
 template <typename T> struct AlignBytes<const T> : AlignBytes<T> {};
 template <typename T> struct AlignBytes<const volatile T> : AlignBytes<T> {};
 // clang-format on
+} // namespace detail
+
+template <typename T>
+using AlignBytes CCCL_DEPRECATED_BECAUSE("Use alignof(T) directly") = detail::AlignBytes<T>;
 
 /// Unit-words of data movement
 template <typename T>
 struct UnitWord
 {
-  static constexpr auto ALIGN_BYTES = AlignBytes<T>::ALIGN_BYTES;
+  static constexpr auto ALIGN_BYTES = alignof(T);
 
   template <typename Unit>
   struct IsMultiple
   {
-    static constexpr auto UNIT_ALIGN_BYTES = AlignBytes<Unit>::ALIGN_BYTES;
+    static constexpr auto UNIT_ALIGN_BYTES = alignof(Unit);
     static constexpr bool IS_MULTIPLE =
       (sizeof(T) % sizeof(Unit) == 0) && (int(ALIGN_BYTES) % int(UNIT_ALIGN_BYTES) == 0);
   };