commit 41c5fb1e807178170f38e7c011922b35d192576b
author Sameer Agarwal <sameeragarwal@google.com> Thu May 19 00:47:24 2022 -0700
committer Sameer Agarwal <sameeragarwal@google.com> Thu May 19 11:05:46 2022 -0700
tree 45795d906bf75fb24123d2f599f35526cbe3bb2c
parent 12263e28305a2a43b6c6a6b4f7f76814ab7ffa5f

Refactor suitesparse.h/cc

1. Generalize SuiteSparse::AnalyzeCholesky and
   SuiteSparse::BlockAnalyzeCholesky from just doing AMD to taking
   OrderingType as an argument and using that to determine whether
   AMD & Nested Dissection algorithms are used for computing the
   fill-reducing ordering or a natural ordering when computing
   the symbolic factorization.

2. Remove AnalyzeCholeskyWithNaturalOrdering.

3. Replace and generalize SuiteSparse::BlockAMDOrdering with
   SuiteSparse::BlockOrdering which also takes OrderingType as an
   argument. Same for SuiteSparse::ApproximateMinimumDegreeOrdering
   and SuiteSparse::NestedDissectionOrdering by
   SuiteSparse::Ordering.

4. Remove LinearSolver::Options::use_postordering and replace it
   with LinearSolver::Options::ordering_type.

5. Replace Preconditioner::Options::use_postordering and replace it
   with Preconditioner::Options::ordering_type.

6. Add NESDIS to OrderingType. With the above changes, the linear
   solvers can now use Nested Dissection once this information
   is piped through the nonlinear solver.

Change-Id: Ib8e93fbf34ae2981bf2ac54dcda9e25c7c213790