[Mlir-commits] [mlir] [MLIR][Presburger][WIP] Implement vertex enumeration and chamber decomposition for polytope generating function computation. (PR #78987)

[Arjun P]

================
@@ -354,6 +354,19 @@ static void modEntryColumnOperation(Matrix<MPInt> &m, unsigned row,
   otherMatrix.addToColumn(sourceCol, targetCol, ratio);
 }
 
+template <typename T>
+Matrix<T> Matrix<T>::getSubMatrix(unsigned fromRow, unsigned toRow,
+                                  unsigned fromColumn,
+                                  unsigned toColumn) const {
+  assert(toRow >= fromRow && "end of row range must be after beginning!");
+  assert(toColumn >= fromColumn && "end of row range must be after beginning!");
+  Matrix<T> subMatrix(toRow - fromRow + 1, toColumn - fromColumn + 1);
+  for (unsigned i = fromRow; i <= toRow; i++)
----------------
Superty wrote:

++i, ++j

https://github.com/llvm/llvm-project/pull/78987