151     Mat      preallocator;  in MatAXPY_Basic_Preallocate()  local
159     PetscCall(MatCreate(PetscObjectComm((PetscObject)Y), &preallocator));  in MatAXPY_Basic_Preallocate()
160     PetscCall(MatSetType(preallocator, MATPREALLOCATOR));  in MatAXPY_Basic_Preallocate()
161     PetscCall(MatSetLayouts(preallocator, Y->rmap, Y->cmap));  in MatAXPY_Basic_Preallocate()
162     PetscCall(MatSetUp(preallocator));  in MatAXPY_Basic_Preallocate()
163     PetscCall(MatGetOwnershipRange(preallocator, &rstart, &rend));  in MatAXPY_Basic_Preallocate()
170       PetscCall(MatSetValues(preallocator, 1, &r, ncols, row, vals, INSERT_VALUES));  in MatAXPY_Basic_Preallocate()
173       PetscCall(MatSetValues(preallocator, 1, &r, ncols, row, vals, INSERT_VALUES));  in MatAXPY_Basic_Preallocate()
176     PetscCall(MatSetOption(preallocator, MAT_NO_OFF_PROC_ENTRIES, PETSC_TRUE));  in MatAXPY_Basic_Preallocate()
177     PetscCall(MatAssemblyBegin(preallocator, MAT_FINAL_ASSEMBLY));  in MatAXPY_Basic_Preallocate()
178     PetscCall(MatAssemblyEnd(preallocator, MAT_FINAL_ASSEMBLY));  in MatAXPY_Basic_Preallocate()
185     PetscCall(MatPreallocatorPreallocate(preallocator, PETSC_FALSE, *B));  in MatAXPY_Basic_Preallocate()
186     PetscCall(MatDestroy(&preallocator));  in MatAXPY_Basic_Preallocate()