diff --git a/mlir/include/mlir/ExecutionEngine/SparseTensorUtils.h b/mlir/include/mlir/ExecutionEngine/SparseTensorUtils.h
--- a/mlir/include/mlir/ExecutionEngine/SparseTensorUtils.h
+++ b/mlir/include/mlir/ExecutionEngine/SparseTensorUtils.h
@@ -50,9 +50,10 @@
   kEmpty = 0,
   kFromFile = 1,
   kFromCOO = 2,
-  kEmptyCOO = 3,
-  kToCOO = 4,
-  kToIterator = 5
+  kSparseToSparse = 3,
+  kEmptyCOO = 4,
+  kToCOO = 5,
+  kToIterator = 6
 };
 
 /// This enum mimics `SparseTensorEncodingAttr::DimLevelType` for
diff --git a/mlir/test/Dialect/SparseTensor/conversion_sparse2dense.mlir b/mlir/test/Dialect/SparseTensor/conversion_sparse2dense.mlir
--- a/mlir/test/Dialect/SparseTensor/conversion_sparse2dense.mlir
+++ b/mlir/test/Dialect/SparseTensor/conversion_sparse2dense.mlir
@@ -29,7 +29,7 @@
 //   CHECK-DAG: memref.store %[[I0]], %[[PermS]][%[[I0]]] : memref<1xindex>
 //   CHECK-DAG: %[[zeroI32:.*]] = arith.constant 0 : i32
 //   CHECK-DAG: %[[ElemTp:.*]] = arith.constant 4 : i32
-//   CHECK-DAG: %[[ActionToIter:.*]] = arith.constant 5 : i32
+//   CHECK-DAG: %[[ActionToIter:.*]] = arith.constant 6 : i32
 //   CHECK-DAG: %[[Iter:.*]] = call @newSparseTensor(%[[AttrsD]], %[[SizesD]], %[[PermD]], %[[zeroI32]], %[[zeroI32]], %[[ElemTp]], %[[ActionToIter]], %[[Arg]]) : (memref<?xi8>, memref<?xindex>, memref<?xindex>, i32, i32, i32, i32, !llvm.ptr<i8>) -> !llvm.ptr<i8>
 //   CHECK-DAG: %[[IndS:.*]] = memref.alloca() : memref<1xindex>
 //   CHECK-DAG: %[[IndD:.*]] = memref.cast %[[IndS]] : memref<1xindex> to memref<?xindex>
@@ -68,7 +68,7 @@
 //   CHECK-DAG: memref.store %[[I0]], %[[PermS]][%[[I0]]] : memref<1xindex>
 //   CHECK-DAG: %[[zeroI32:.*]] = arith.constant 0 : i32
 //   CHECK-DAG: %[[ElemTp:.*]] = arith.constant 4 : i32
-//   CHECK-DAG: %[[ActionToIter:.*]] = arith.constant 5 : i32
+//   CHECK-DAG: %[[ActionToIter:.*]] = arith.constant 6 : i32
 //   CHECK-DAG: %[[Iter:.*]] = call @newSparseTensor(%[[AttrsD]], %[[SizesD]], %[[PermD]], %[[zeroI32]], %[[zeroI32]], %[[ElemTp]], %[[ActionToIter]], %[[Arg]]) : (memref<?xi8>, memref<?xindex>, memref<?xindex>, i32, i32, i32, i32, !llvm.ptr<i8>) -> !llvm.ptr<i8>
 //   CHECK-DAG: %[[IndS:.*]] = memref.alloca() : memref<1xindex>
 //   CHECK-DAG: %[[IndD:.*]] = memref.cast %[[IndS]] : memref<1xindex> to memref<?xindex>
@@ -110,7 +110,7 @@
 //   CHECK-DAG: %[[PermD:.*]] = memref.cast %[[PermS]] : memref<2xindex> to memref<?xindex>
 //   CHECK-DAG: memref.store %[[I0]], %[[PermS]][%[[I0]]] : memref<2xindex>
 //   CHECK-DAG: memref.store %[[I1]], %[[PermS]][%[[I1]]] : memref<2xindex>
-//   CHECK-DAG: %[[ActionToIter:.*]] = arith.constant 5 : i32
+//   CHECK-DAG: %[[ActionToIter:.*]] = arith.constant 6 : i32
 //   CHECK-DAG: %[[Iter:.*]] = call @newSparseTensor(%[[AttrsD]], %[[SizesD]], %[[PermD]], %{{.*}}, %{{.*}}, %{{.*}}, %[[ActionToIter]], %[[Arg]]) : (memref<?xi8>, memref<?xindex>, memref<?xindex>, i32, i32, i32, i32, !llvm.ptr<i8>) -> !llvm.ptr<i8>
 //   CHECK-DAG: %[[IndS:.*]] = memref.alloca() : memref<2xindex>
 //   CHECK-DAG: %[[IndD:.*]] = memref.cast %[[IndS]] : memref<2xindex> to memref<?xindex>
@@ -154,7 +154,7 @@
 //   CHECK-DAG: %[[PermD:.*]] = memref.cast %[[PermS]] : memref<2xindex> to memref<?xindex>
 //   CHECK-DAG: memref.store %[[I0]], %[[PermS]][%[[I0]]] : memref<2xindex>
 //   CHECK-DAG: memref.store %[[I1]], %[[PermS]][%[[I1]]] : memref<2xindex>
-//   CHECK-DAG: %[[ActionToIter:.*]] = arith.constant 5 : i32
+//   CHECK-DAG: %[[ActionToIter:.*]] = arith.constant 6 : i32
 //   CHECK-DAG: %[[Iter:.*]] = call @newSparseTensor(%[[AttrsD]], %[[SizesD]], %[[PermD]], %{{.*}}, %{{.*}}, %{{.*}}, %[[ActionToIter]], %[[Arg]]) : (memref<?xi8>, memref<?xindex>, memref<?xindex>, i32, i32, i32, i32, !llvm.ptr<i8>) -> !llvm.ptr<i8>
 //   CHECK-DAG: %[[IndS:.*]] = memref.alloca() : memref<2xindex>
 //   CHECK-DAG: %[[IndD:.*]] = memref.cast %[[IndS]] : memref<2xindex> to memref<?xindex>
@@ -198,7 +198,7 @@
 //   CHECK-DAG: %[[PermD:.*]] = memref.cast %[[PermS]] : memref<2xindex> to memref<?xindex>
 //   CHECK-DAG: memref.store %[[I0]], %[[PermS]][%[[I0]]] : memref<2xindex>
 //   CHECK-DAG: memref.store %[[I1]], %[[PermS]][%[[I1]]] : memref<2xindex>
-//   CHECK-DAG: %[[ActionToIter:.*]] = arith.constant 5 : i32
+//   CHECK-DAG: %[[ActionToIter:.*]] = arith.constant 6 : i32
 //   CHECK-DAG: %[[Iter:.*]] = call @newSparseTensor(%[[AttrsD]], %[[SizesD]], %[[PermD]], %{{.*}}, %{{.*}}, %{{.*}}, %[[ActionToIter]], %[[Arg]]) : (memref<?xi8>, memref<?xindex>, memref<?xindex>, i32, i32, i32, i32, !llvm.ptr<i8>) -> !llvm.ptr<i8>
 //   CHECK-DAG: %[[IndS:.*]] = memref.alloca() : memref<2xindex>
 //   CHECK-DAG: %[[IndD:.*]] = memref.cast %[[IndS]] : memref<2xindex> to memref<?xindex>
@@ -242,7 +242,7 @@
 //   CHECK-DAG: %[[PermD:.*]] = memref.cast %[[PermS]] : memref<2xindex> to memref<?xindex>
 //   CHECK-DAG: memref.store %[[I0]], %[[PermS]][%[[I0]]] : memref<2xindex>
 //   CHECK-DAG: memref.store %[[I1]], %[[PermS]][%[[I1]]] : memref<2xindex>
-//   CHECK-DAG: %[[ActionToIter:.*]] = arith.constant 5 : i32
+//   CHECK-DAG: %[[ActionToIter:.*]] = arith.constant 6 : i32
 //   CHECK-DAG: %[[Iter:.*]] = call @newSparseTensor(%[[AttrsD]], %[[SizesD]], %[[PermD]], %{{.*}}, %{{.*}}, %{{.*}}, %[[ActionToIter]], %[[Arg]]) : (memref<?xi8>, memref<?xindex>, memref<?xindex>, i32, i32, i32, i32, !llvm.ptr<i8>) -> !llvm.ptr<i8>
 //   CHECK-DAG: %[[IndS:.*]] = memref.alloca() : memref<2xindex>
 //   CHECK-DAG: %[[IndD:.*]] = memref.cast %[[IndS]] : memref<2xindex> to memref<?xindex>
@@ -290,7 +290,7 @@
 //   CHECK-DAG: memref.store %[[I0]], %[[PermS]][%[[I0]]] : memref<3xindex>
 //   CHECK-DAG: memref.store %[[I1]], %[[PermS]][%[[I1]]] : memref<3xindex>
 //   CHECK-DAG: memref.store %[[I2]], %[[PermS]][%[[I2]]] : memref<3xindex>
-//   CHECK-DAG: %[[ActionToIter:.*]] = arith.constant 5 : i32
+//   CHECK-DAG: %[[ActionToIter:.*]] = arith.constant 6 : i32
 //   CHECK-DAG: %[[Iter:.*]] = call @newSparseTensor(%[[AttrsD]], %[[SizesD]], %[[PermD]], %{{.*}}, %{{.*}}, %{{.*}}, %[[ActionToIter]], %[[Arg]]) : (memref<?xi8>, memref<?xindex>, memref<?xindex>, i32, i32, i32, i32, !llvm.ptr<i8>) -> !llvm.ptr<i8>
 //   CHECK-DAG: %[[IndS:.*]] = memref.alloca() : memref<3xindex>
 //   CHECK-DAG: %[[IndD:.*]] = memref.cast %[[IndS]] : memref<3xindex> to memref<?xindex>