[SYCL][NFC] Optimize dependencies of atomic_ref

Author: AlexeySachkov

sycl/include/sycl/detail/spirv.hpp

@@ -10,7 +10,11 @@
 
 #ifdef __SYCL_DEVICE_ONLY__
 
-#include <sycl/ext/oneapi/experimental/non_uniform_groups.hpp> // for IdToMaskPosition
+#include <sycl/__spirv/spirv_types.hpp>
+#include <sycl/access/access.hpp>
+#include <sycl/id.hpp>
+#include <sycl/multi_ptr.hpp>
+#include <sycl/detail/generic_type_traits.hpp>
 
 #if defined(__NVPTX__)
 #include <sycl/ext/oneapi/experimental/cuda/masked_shuffles.hpp>

sycl/include/sycl/ext/oneapi/sub_group_mask.hpp

@@ -9,11 +9,11 @@
 
 #include <sycl/detail/helpers.hpp> // for Builder
 #include <sycl/detail/memcpy.hpp>  // detail::memcpy
-#include <sycl/exception.hpp>      // for errc, exception
-#include <sycl/feature_test.hpp>   // for SYCL_EXT_ONEAPI_SUB_GROUP_MASK
-#include <sycl/id.hpp>             // for id
-#include <sycl/marray.hpp>         // for marray
-#include <sycl/vector.hpp>         // for vec
+#include <sycl/detail/spirv.hpp>
+#include <sycl/feature_test.hpp> // for SYCL_EXT_ONEAPI_SUB_GROUP_MASK
+#include <sycl/id.hpp>           // for id
+#include <sycl/marray.hpp>       // for marray
+#include <sycl/vector.hpp>       // for vec
 
 #include <assert.h>     // for assert
 #include <climits>      // for CHAR_BIT
@@ -342,8 +342,7 @@ template <typename Group>
 std::enable_if_t<std::is_same_v<std::decay_t<Group>, sub_group> ||
                      std::is_same_v<std::decay_t<Group>, sycl::sub_group>,
                  sub_group_mask>
-group_ballot(Group g, bool predicate) {
-  (void)g;
+group_ballot([[maybe_unused]] Group g, [[maybe_unused]] bool predicate) {
 #ifdef __SYCL_DEVICE_ONLY__
   auto res = __spirv_GroupNonUniformBallot(
       sycl::detail::spirv::group_scope<Group>::value, predicate);
@@ -353,20 +352,11 @@ group_ballot(Group g, bool predicate) {
   return sycl::detail::Builder::createSubGroupMask<sub_group_mask>(
       val, g.get_max_local_range()[0]);
 #else
-  (void)predicate;
-  throw exception{errc::feature_not_supported,
-                  "Sub-group mask is not supported on host device"};
+  // Groups are not user-constructible, this call should not be reachable from
+  // host and therefore we do nothing here.
 #endif
 }
 
 } // namespace ext::oneapi
 } // namespace _V1
 } // namespace sycl
-
-// We have a cyclic dependency with
-//   sub_group_mask.hpp
-//   detail/spirv.hpp
-//   non_uniform_groups.hpp
-// "Break" it by including this at the end (instead of beginning). Ideally, we
-// should refactor this somehow...
-#include <sycl/detail/spirv.hpp>