[CUDA] Bump the latest supported CUDA version to 11.4.

This should reduce the amount of noise issued by clang for the recent-ish CUDA versions. Clang still does not support all the features offered by NVCC, but is expected to handle CUDA headers and produce binaries for all GPUs supported by NVCC. Differential Revision: https://reviews.llvm.org/D108248
llvm · Aug 23, 2021 · ce4545d · ce4545d
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diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
@@ -117,6 +117,12 @@ C++2b Feature Support
 ^^^^^^^^^^^^^^^^^^^^^
 ...
 
+CUDA Language Changes in Clang
+---------------------------
+
+- Clang now supports CUDA versions up to 11.4.
+- Default GPU architecture has been changed from sm_20 to sm_35.
+
 Objective-C Language Changes in Clang
 -------------------------------------
 

diff --git a/clang/include/clang/Basic/Cuda.h b/clang/include/clang/Basic/Cuda.h
@@ -33,7 +33,7 @@ enum class CudaVersion {
   CUDA_112,
   CUDA_113,
   CUDA_114,
-  FULLY_SUPPORTED = CUDA_101,
+  FULLY_SUPPORTED = CUDA_114,
   PARTIALLY_SUPPORTED =
       CUDA_114, // Partially supported. Proceed with a warning.
   NEW = 10000,  // Too new. Issue a warning, but allow using it.