message: Use clang builtin to get warp lane instead of inline ptx.
diff: @@ -118,7 +118,11 @@ const unsigned kCudaWarpAll = 0xffffffff;
  __device__ inline unsigned CudaLaneId() {
  unsigned int lane_id;
  #if GOOGLE_CUDA
  +#if __clang__
  + return __nvvm_read_ptx_sreg_laneid();
  +#else // __clang__
  asm("mov.u32 %0, %%laneid;" : "=r"(lane_id));
  +#endif // __clang__
  #elif TENSORFLOW_USE_ROCM
  land_id = __lane_id();
  #endif
  