1269 PetscErrorCode PCSetOperators(PC pc, Mat Amat, Mat Pmat)  in PCSetOperators()  argument
1276   if (Pmat) PetscValidHeaderSpecific(Pmat, MAT_CLASSID, 3);  in PCSetOperators()
1278   if (Pmat) PetscCheckSameComm(pc, 1, Pmat, 3);  in PCSetOperators()
1279   if (pc->setupcalled && pc->mat && pc->pmat && Amat && Pmat) {  in PCSetOperators()
1283     PetscCall(MatGetLocalSize(Pmat, &m1, &n1));  in PCSetOperators()
1288   if (Pmat != pc->pmat) {  in PCSetOperators()
1297   if (Pmat) PetscCall(PetscObjectReference((PetscObject)Pmat));  in PCSetOperators()
1300   pc->pmat = Pmat;  in PCSetOperators()
1416 PetscErrorCode PCGetOperators(PC pc, Mat *Amat, Mat *Pmat)  in PCGetOperators()  argument
1422       if (pc->pmat && !Pmat) { /* Pmat has been set, but user did not request it, so use for Amat */  in PCGetOperators()
1427         if (!Pmat) { /* user did NOT request Pmat, so make same as Amat */  in PCGetOperators()
1435   if (Pmat) {  in PCGetOperators()
1448     *Pmat = pc->pmat;  in PCGetOperators()