mpihelp_cmp
} else if (mpihelp_cmp(up, vp, usize) < 0) {
cmp = mpihelp_cmp(u->d, v->d, usize);
int mpihelp_cmp(mpi_ptr_t op1_ptr, mpi_ptr_t op2_ptr, mpi_size_t size);
|| mpihelp_cmp(np, dp, dsize - 1) >= 0) {
if (mpihelp_cmp(up + hsize, up, hsize) >= 0) {
if (mpihelp_cmp(vp + hsize, vp, hsize) >= 0) {
if (mpihelp_cmp(up + hsize, up, hsize) >= 0)