- smpi_datatype_copy((char *)sendbuf + root * sendcount * sendext,
- sendcount, sendtype, recvbuf, recvcount, recvtype);
+ if(recvbuf!=MPI_IN_PLACE){
+ smpi_datatype_copy((char *)sendbuf + root * sendcount * sendext,
+ sendcount, sendtype, recvbuf, recvcount, recvtype);
+ }