[clang-tools-extra] [MLIR][Presburger] Implement matrix inverse (PR #67382)

[Arjun P via cfe-commits]

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@@ -432,4 +432,138 @@ MPInt IntMatrix::normalizeRow(unsigned row, unsigned cols) {
 
 MPInt IntMatrix::normalizeRow(unsigned row) {
   return normalizeRow(row, getNumColumns());
+}
+
+MPInt IntMatrix::determinant() {
+  unsigned r = getNumRows();
+  unsigned c = getNumColumns();
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Superty wrote:

if they are already member variables in Matrix, you can use them directly

https://github.com/llvm/llvm-project/pull/67382