[Mlir-commits] [mlir] [MLIR][Presburger] Add support for Smith normal form (PR #185328)

[Arjun Pitchanathan]

================
@@ -274,6 +274,15 @@ class IntMatrix : public Matrix<DynamicAPInt> {
   ///    pivot.
   std::pair<IntMatrix, IntMatrix> computeHermiteNormalForm() const;
 
+  /// Given the current matrix M, returns the matrices U, D, V such that
+  /// UMV = D, where D is called the Smith Normal Form (SNF).
+  /// The matrices have the following properties:
+  ///   - U, V are unimodular. In other words, det(U), det(V) are 1 or -1;
+  ///     their inverse also contain integer entries.
----------------
superty wrote:

inverses also contain only integer entries

https://github.com/llvm/llvm-project/pull/185328