tra added a comment. Looks like it breaks CUDA: http://lab.llvm.org:8011/#/builders/46/builds/304
[10/873] Building CXX object External/CUDA/CMakeFiles/printf-cuda-11.0-c++14-libstdc++-6.dir/printf.cu.o FAILED: External/CUDA/CMakeFiles/printf-cuda-11.0-c++14-libstdc++-6.dir/printf.cu.o /buildbot/cuda-t4-0/work/None_clang-cuda-t4/clang/bin/clang++ -DNDEBUG -O3 -DNDEBUG -w -Werror=date-time -UNDEBUG --cuda-path=/buildbot/cuda-t4-0/work/None_clang-cuda-t4/external/cuda/cuda-11.0 -I/buildbot/cuda-t4-0/work/None_clang-cuda-t4/external/cuda/cuda-11.0/include --cuda-gpu-arch=sm_75 -std=c++14 -stdlib=libstdc++ -gcc-toolchain /buildbot/cuda-t4-0/work/None_clang-cuda-t4/external/cuda/gcc-6 -DSTDLIB_VERSION=2014 -MD -MT External/CUDA/CMakeFiles/printf-cuda-11.0-c++14-libstdc++-6.dir/printf.cu.o -MF External/CUDA/CMakeFiles/printf-cuda-11.0-c++14-libstdc++-6.dir/printf.cu.o.d -o External/CUDA/CMakeFiles/printf-cuda-11.0-c++14-libstdc++-6.dir/printf.cu.o -c /buildbot/cuda-t4-0/work/None_clang-cuda-t4/llvm-test-suite/External/CUDA/printf.cu In file included from <built-in>:1: In file included from /buildbot/cuda-t4-0/work/None_clang-cuda-t4/clang/lib/clang/12.0.0/include/__clang_cuda_runtime_wrapper.h:412: /buildbot/cuda-t4-0/work/None_clang-cuda-t4/clang/lib/clang/12.0.0/include/__clang_cuda_cmath.h:177:18: error: redefinition of 'remquo' __DEVICE__ float remquo(float __n, float __d, int *__q) { ^ /buildbot/cuda-t4-0/work/None_clang-cuda-t4/external/cuda/cuda-11.0/include/crt/math_functions.hpp:685:31: note: previous definition is here __MATH_FUNCTIONS_DECL__ float remquo(float a, float b, int *quo) ^ 1 error generated when compiling for sm_75. [11/873] Building CXX object External/CUDA/CMakeFiles/builtin_var-cuda-11.0-c++14-libstdc++-7.dir/builtin_var.cu.o FAILED: External/CUDA/CMakeFiles/builtin_var-cuda-11.0-c++14-libstdc++-7.dir/builtin_var.cu.o /buildbot/cuda-t4-0/work/None_clang-cuda-t4/clang/bin/clang++ -DNDEBUG -O3 -DNDEBUG -w -Werror=date-time -UNDEBUG --cuda-path=/buildbot/cuda-t4-0/work/None_clang-cuda-t4/external/cuda/cuda-11.0 -I/buildbot/cuda-t4-0/work/None_clang-cuda-t4/external/cuda/cuda-11.0/include --cuda-gpu-arch=sm_75 -std=c++14 -stdlib=libstdc++ -gcc-toolchain /buildbot/cuda-t4-0/work/None_clang-cuda-t4/external/cuda/gcc-7 -DSTDLIB_VERSION=2014 -MD -MT External/CUDA/CMakeFiles/builtin_var-cuda-11.0-c++14-libstdc++-7.dir/builtin_var.cu.o -MF External/CUDA/CMakeFiles/builtin_var-cuda-11.0-c++14-libstdc++-7.dir/builtin_var.cu.o.d -o External/CUDA/CMakeFiles/builtin_var-cuda-11.0-c++14-libstdc++-7.dir/builtin_var.cu.o -c /buildbot/cuda-t4-0/work/None_clang-cuda-t4/llvm-test-suite/External/CUDA/builtin_var.cu In file included from <built-in>:1: In file included from /buildbot/cuda-t4-0/work/None_clang-cuda-t4/clang/lib/clang/12.0.0/include/__clang_cuda_runtime_wrapper.h:412: /buildbot/cuda-t4-0/work/None_clang-cuda-t4/clang/lib/clang/12.0.0/include/__clang_cuda_cmath.h:177:18: error: redefinition of 'remquo' __DEVICE__ float remquo(float __n, float __d, int *__q) { ^ /buildbot/cuda-t4-0/work/None_clang-cuda-t4/external/cuda/cuda-11.0/include/crt/math_functions.hpp:685:31: note: previous definition is here __MATH_FUNCTIONS_DECL__ float remquo(float a, float b, int *quo) ^ 1 error generated when compiling for sm_75. [12/873] Building CXX object External/CUDA/CMakeFiles/assert-cuda-11.0-c++14-libstdc++-7.dir/assert.cu.o FAILED: External/CUDA/CMakeFiles/assert-cuda-11.0-c++14-libstdc++-7.dir/assert.cu.o /buildbot/cuda-t4-0/work/None_clang-cuda-t4/clang/bin/clang++ -DNDEBUG -O3 -DNDEBUG -w -Werror=date-time -UNDEBUG --cuda-path=/buildbot/cuda-t4-0/work/None_clang-cuda-t4/external/cuda/cuda-11.0 -I/buildbot/cuda-t4-0/work/None_clang-cuda-t4/external/cuda/cuda-11.0/include --cuda-gpu-arch=sm_75 -std=c++14 -stdlib=libstdc++ -gcc-toolchain /buildbot/cuda-t4-0/work/None_clang-cuda-t4/external/cuda/gcc-7 -DSTDLIB_VERSION=2014 -MD -MT External/CUDA/CMakeFiles/assert-cuda-11.0-c++14-libstdc++-7.dir/assert.cu.o -MF External/CUDA/CMakeFiles/assert-cuda-11.0-c++14-libstdc++-7.dir/assert.cu.o.d -o External/CUDA/CMakeFiles/assert-cuda-11.0-c++14-libstdc++-7.dir/assert.cu.o -c /buildbot/cuda-t4-0/work/None_clang-cuda-t4/llvm-test-suite/External/CUDA/assert.cu In file included from <built-in>:1: In file included from /buildbot/cuda-t4-0/work/None_clang-cuda-t4/clang/lib/clang/12.0.0/include/__clang_cuda_runtime_wrapper.h:412: /buildbot/cuda-t4-0/work/None_clang-cuda-t4/clang/lib/clang/12.0.0/include/__clang_cuda_cmath.h:177:18: error: redefinition of 'remquo' __DEVICE__ float remquo(float __n, float __d, int *__q) { ^ /buildbot/cuda-t4-0/work/None_clang-cuda-t4/external/cuda/cuda-11.0/include/crt/math_functions.hpp:685:31: note: previous definition is here __MATH_FUNCTIONS_DECL__ float remquo(float a, float b, int *quo) ^ 1 error generated when compiling for sm_75. 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