message: Replace DLOG(FATAL) with an Unimplemented error.
  In tensorflow we don't have DLOG, and we should not use LOG(FATAL).
diff: @@ -607,8 +607,9 @@ Status IrEmitter::HandleSort(HloInstruction* sort) {
  keys_native_type = b_.getDoubleTy()->getPointerTo();
  break;
  default:
  - DLOG(FATAL) << "Element type " << PrimitiveType_Name(keys_type)
  - << " not supported in the Sort op on CPU.";
  + return Unimplemented(
  + "Element type %s not supported in the Sort op on CPU.",
  + PrimitiveType_Name(keys_type));
  }
  llvm::FunctionType* key_value_sort_type = llvm::FunctionType::get(
  