- Request::sendrecv(NULL, 0, MPI_BYTE, src, COLL_TAG_BARRIER,
- NULL, 0, MPI_BYTE, src, COLL_TAG_BARRIER,
- comm, MPI_STATUS_IGNORE);
+ Request::sendrecv(nullptr, 0, MPI_BYTE, src, COLL_TAG_BARRIER, nullptr, 0, MPI_BYTE, src, COLL_TAG_BARRIER,
+ comm, MPI_STATUS_IGNORE);