llc -mcpu=sm_60 kernel_test.bc -o kernel_test.ptx
ptxas --gpu-name=sm_60 kernel_test.ptx -o kernel_test.cubin
clang -S -emit-llvm --cuda-gpu-arch=sm_60 kernel_test.cu
llc -mcpu=sm_60 kernel_test.bc -o kernel_test.ptx
ptxas --gpu-name=sm_60 kernel_test.ptx -o kernel_test.cubin
clang -S -emit-llvm --cuda-gpu-arch=sm_60 kernel_test.cu