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-rw-r--r--clang/lib/Headers/__clang_cuda_runtime_wrapper.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/clang/lib/Headers/__clang_cuda_runtime_wrapper.h b/clang/lib/Headers/__clang_cuda_runtime_wrapper.h
index e4fc5860b50..b8ffc2ce9ff 100644
--- a/clang/lib/Headers/__clang_cuda_runtime_wrapper.h
+++ b/clang/lib/Headers/__clang_cuda_runtime_wrapper.h
@@ -173,7 +173,18 @@ inline __host__ double __signbitd(double x) {
// __device__.
#pragma push_macro("__forceinline__")
#define __forceinline__ __device__ __inline__ __attribute__((always_inline))
+
+#pragma push_macro("__float2half_rn")
+#if CUDA_VERSION >= 9000
+// CUDA-9 has conflicting prototypes for __float2half_rn(float f) in
+// cuda_fp16.h[pp] and device_functions.hpp. We need to get the one in
+// device_functions.hpp out of the way.
+#define __float2half_rn __float2half_rn_disabled
+#endif
+
#include "device_functions.hpp"
+#pragma pop_macro("__float2half_rn")
+
// math_function.hpp uses the __USE_FAST_MATH__ macro to determine whether we
// get the slow-but-accurate or fast-but-inaccurate versions of functions like
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