[SYCL] Provided some aliases to sycl

Signed-off-by: mdimakov <[email protected]>

Author: maximdimakov

sycl/include/CL/sycl.hpp

@@ -29,6 +29,7 @@
 #include <CL/sycl/exception.hpp>
 #include <CL/sycl/feature_test.hpp>
 #include <CL/sycl/group.hpp>
+#include <CL/sycl/group_algorithm.hpp>
 #include <CL/sycl/group_local_memory.hpp>
 #include <CL/sycl/handler.hpp>
 #include <CL/sycl/id.hpp>

sycl/include/CL/sycl/ONEAPI/functional.hpp

@@ -11,6 +11,9 @@
 
 __SYCL_INLINE_NAMESPACE(cl) {
 namespace sycl {
+
+template <typename T = void> using plus = std::plus<T>;
+
 namespace ONEAPI {
 
 template <typename T = void> struct minimum {

sycl/include/CL/sycl/group_algorithm.hpp

@@ -0,0 +1,20 @@
+//==----------- group_algorithm.hpp ------------------------------------==//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#pragma once
+#include <CL/sycl/ONEAPI/group_algorithm.hpp>
+
+__SYCL_INLINE_NAMESPACE(cl) {
+namespace sycl {
+  template <typename... Args>
+  auto reduce_over_group(Args&&... args) 
+      -> decltype(ONEAPI::reduce(std::forward<Args>(args)...)) {
+    return ONEAPI::reduce(std::forward<Args>(args)...);
+  }
+} // namespace sycl
+} // __SYCL_INLINE_NAMESPACE(cl)