erase_indices);
      llvm::BitVector body_bit_vector(
          new_while_op.getBody().front().getNumArguments());
      for (auto i : args_to_erase) body_bit_vector.set(i);
      new_while_op.getBody().front().eraseArguments(body_bit_vector);
      llvm::BitVector cond_bit_vector(
          new_while_op.getCond().front().getNumArguments());