15     PetscCall(MatMult(gn->Hreg, in, gn->x_work));  in GNHessianProd()
177     PetscCall((*gn->regularizerhessian)(tao, X, gn->Hreg, gn->reg_hess_ctx));  in GNComputeHessian()
178     if (gn->mat_explicit) PetscCall(MatAXPY(gn->H, 1.0, gn->Hreg, DIFFERENT_NONZERO_PATTERN));  in GNComputeHessian()
497   PetscCall(MatDestroy(&gn->Hreg));  in TaoDestroy_BRGN()
697 … TaoBRGNSetRegularizerHessianRoutine(Tao tao, Mat Hreg, PetscErrorCode (*func)(Tao tao, Vec u, Mat…  in TaoBRGNSetRegularizerHessianRoutine()  argument
701 …Routine_C", (Tao, Mat, PetscErrorCode (*)(Tao, Vec, Mat, void *), void *), (tao, Hreg, func, ctx));  in TaoBRGNSetRegularizerHessianRoutine()
705 …RGNSetRegularizerHessianRoutine_BRGN(Tao tao, Mat Hreg, PetscErrorCode (*func)(Tao tao, Vec u, Mat…  in TaoBRGNSetRegularizerHessianRoutine_BRGN()  argument
710   if (Hreg) {  in TaoBRGNSetRegularizerHessianRoutine_BRGN()
711     PetscValidHeaderSpecific(Hreg, MAT_CLASSID, 2);  in TaoBRGNSetRegularizerHessianRoutine_BRGN()
712     PetscCheckSameComm(tao, 1, Hreg, 2);  in TaoBRGNSetRegularizerHessianRoutine_BRGN()
716   if (Hreg) {  in TaoBRGNSetRegularizerHessianRoutine_BRGN()
717     PetscCall(PetscObjectReference((PetscObject)Hreg));  in TaoBRGNSetRegularizerHessianRoutine_BRGN()
718     PetscCall(MatDestroy(&gn->Hreg));  in TaoBRGNSetRegularizerHessianRoutine_BRGN()
719     gn->Hreg = Hreg;  in TaoBRGNSetRegularizerHessianRoutine_BRGN()