43     PetscCall(MatDestroy(&tao->hessian));  in TaoSetHessian()
44     tao->hessian = H;  in TaoSetHessian()
83   if (H) *H = tao->hessian;  in TaoGetHessian()
92   Mat               A, B, C, D, hessian;  in TaoTestHessian()  local
128   PetscCall(PetscObjectTypeCompare((PetscObject)tao->hessian, MATMFFD, &flg));  in TaoTestHessian()
129   if (!flg) hessian = tao->hessian;  in TaoTestHessian()
130   else hessian = tao->hessian_pre;  in TaoTestHessian()
132   while (hessian) {  in TaoTestHessian()
133 …PetscCall(PetscObjectBaseTypeCompareAny((PetscObject)hessian, &flg, MATSEQAIJ, MATMPIAIJ, MATSEQDE…  in TaoTestHessian()
135       A = hessian;  in TaoTestHessian()
138       PetscCall(MatComputeOperator(hessian, MATAIJ, &A));  in TaoTestHessian()
203     if (hessian != tao->hessian_pre) {  in TaoTestHessian()
204       hessian = tao->hessian_pre;  in TaoTestHessian()
206     } else hessian = NULL;  in TaoTestHessian()