827   Mat                  **nest, *snest, **rnest, lA, B;  in MatConvert_Nest_IS()  local
855 …PetscCall(PetscCalloc6(nr, &isrow, nc, &iscol, nr, &islrow, nc, &islcol, nr * nc, &snest, nr * nc,…  in MatConvert_Nest_IS()
874         PetscCall(MatCreateTranspose(lT, &snest[ij]));  in MatConvert_Nest_IS()
879         PetscCall(MatISGetLocalMat(nest[i][j], &snest[ij]));  in MatConvert_Nest_IS()
885       PetscCall(MatGetSize(snest[ij], &l1, &l2));  in MatConvert_Nest_IS()
886       PetscCall(MatGetBlockSizes(snest[ij], &lb1, &lb2));  in MatConvert_Nest_IS()
894       if (rnest && !rnest[i][j] != !snest[ij]) lreuse = PETSC_FALSE;  in MatConvert_Nest_IS()
1059     PetscCall(MatCreateNest(PETSC_COMM_SELF, nr, islrow, nc, islcol, snest, &lA));  in MatConvert_Nest_IS()
1062       if (istrans[i]) PetscCall(MatDestroy(&snest[i]));  in MatConvert_Nest_IS()
1084           if (snest[i * nc + j]) {  in MatConvert_Nest_IS()
1085             PetscCall(MatNestSetSubMat(lA, i, j, snest[i * nc + j]));  in MatConvert_Nest_IS()
1086             if (istrans[i * nc + j]) PetscCall(MatDestroy(&snest[i * nc + j]));  in MatConvert_Nest_IS()
1100       PetscCall(MatCreateNest(PETSC_COMM_SELF, nr, islrow, nc, islcol, snest, &lA));  in MatConvert_Nest_IS()
1102         if (istrans[i]) PetscCall(MatDestroy(&snest[i]));  in MatConvert_Nest_IS()
1148   PetscCall(PetscFree6(isrow, iscol, islrow, islcol, snest, istrans));  in MatConvert_Nest_IS()