[Clang] Remove CUDAAllowVariadicFunctions

Author: Yuanke Luo

clang/include/clang/Basic/LangOptions.def

@@ -245,7 +245,6 @@ LANGOPT(HLSLStrictAvailability, 1, 0, NotCompatible,
 LANGOPT(HLSLSpvUseUnknownImageFormat, 1, 0, NotCompatible, "For storage images and texel buffers, sets the default format to 'Unknown' when not specified via the `vk::image_format` attribute. If this option is not used, the format is inferred from the resource's data type.")
 
 LANGOPT(CUDAIsDevice      , 1, 0, NotCompatible, "compiling for CUDA device")
-LANGOPT(CUDAAllowVariadicFunctions, 1, 0, NotCompatible, "allowing variadic functions in CUDA device code")
 LANGOPT(CUDAHostDeviceConstexpr, 1, 1, NotCompatible, "treating unattributed constexpr functions as __host__ __device__")
 LANGOPT(GPUDeviceApproxTranscendentals, 1, 0, NotCompatible, "using approximate transcendental functions")
 LANGOPT(GPURelocatableDeviceCode, 1, 0, NotCompatible, "generate relocatable device code")

clang/include/clang/Driver/Options.td

@@ -8729,8 +8729,7 @@ def fcuda_include_gpubinary : Separate<["-"], "fcuda-include-gpubinary">,
   HelpText<"Incorporate CUDA device-side binary into host object file.">,
   MarshallingInfoString<CodeGenOpts<"CudaGpuBinaryFileName">>;
 def fcuda_allow_variadic_functions : Flag<["-"], "fcuda-allow-variadic-functions">,
-  HelpText<"Deprecated; Allow variadic functions in CUDA device code.">, Flags<[HelpHidden]>,
-  MarshallingInfoFlag<LangOpts<"CUDAAllowVariadicFunctions">>;
+  HelpText<"Deprecated; Allow variadic functions in CUDA device code.">;
 def fno_cuda_host_device_constexpr : Flag<["-"], "fno-cuda-host-device-constexpr">,
   HelpText<"Don't treat unattributed constexpr functions as __host__ __device__.">,
   MarshallingInfoNegativeFlag<LangOpts<"CUDAHostDeviceConstexpr">>;