Fixed the implementation of Eigen::internal::count_leading_zeros for MSVC. Also updated the code to silence bogux warnings generated by nvcc when compilining this function.
Fixed the implementation of Eigen::internal::count_leading_zeros for MSVC.
Also updated the code to silence bogux warnings generated by nvcc when compilining this function.

pasuka/eigen,ROCmSoftwarePlatform/hipeigen,ritsu1228/eigen,ritsu1228/eigen,pasuka/eigen,pasuka/eigen,ROCmSoftwarePlatform/hipeigen,ROCmSoftwarePlatform/hipeigen,ROCmSoftwarePlatform/hipeigen,pasuka/eigen,ritsu1228/eigen,ritsu1228/eigen,ritsu1228/eigen,pasuka/eigen