[clang] [llvm] [OpenMP] Use generic IR for the OpenMP DeviceRTL (PR #119091)

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``````````bash
git-clang-format --diff 3f458cd9abbf99cddcded076b5e7b4049607b7b4 0df55740f2010c531ee4f96cc0f34aa1b8cea749 --extensions cpp -- clang/lib/Driver/ToolChains/CommonArgs.cpp clang/lib/Driver/ToolChains/Cuda.cpp offload/DeviceRTL/src/Reduction.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/offload/DeviceRTL/src/Reduction.cpp b/offload/DeviceRTL/src/Reduction.cpp
index 34aee7bf2e..43b63cb3c2 100644
--- a/offload/DeviceRTL/src/Reduction.cpp
+++ b/offload/DeviceRTL/src/Reduction.cpp
@@ -72,16 +72,16 @@ static int32_t nvptx_parallel_reduce_nowait(void *reduce_data,
   uint32_t NumThreads = omp_get_num_threads();
   if (NumThreads == 1)
     return 1;
-  /*
-   * This reduce function handles reduction within a team. It handles
-   * parallel regions in both L1 and L2 parallelism levels. It also
-   * supports Generic, SPMD, and NoOMP modes.
-   *
-   * 1. Reduce within a warp.
-   * 2. Warp master copies value to warp 0 via shared memory.
-   * 3. Warp 0 reduces to a single value.
-   * 4. The reduced value is available in the thread that returns 1.
-   */
+    /*
+     * This reduce function handles reduction within a team. It handles
+     * parallel regions in both L1 and L2 parallelism levels. It also
+     * supports Generic, SPMD, and NoOMP modes.
+     *
+     * 1. Reduce within a warp.
+     * 2. Warp master copies value to warp 0 via shared memory.
+     * 3. Warp 0 reduces to a single value.
+     * 4. The reduced value is available in the thread that returns 1.
+     */
 
 #if __has_builtin(__nvvm_reflect)
   if (__nvvm_reflect("__CUDA_ARCH") >= 700) {

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https://github.com/llvm/llvm-project/pull/119091