diff --git a/mlir/lib/Dialect/SparseTensor/Transforms/SparseTensorCodegen.cpp b/mlir/lib/Dialect/SparseTensor/Transforms/SparseTensorCodegen.cpp
--- a/mlir/lib/Dialect/SparseTensor/Transforms/SparseTensorCodegen.cpp
+++ b/mlir/lib/Dialect/SparseTensor/Transforms/SparseTensorCodegen.cpp
@@ -756,14 +756,16 @@
       auto desc = getDescriptorFromTensorTuple(adaptor.getCopy());
       SmallVector<Value> fields;
       fields.reserve(desc.getNumFields());
-
+      // Memcpy on memref fields.
       for (auto field : desc.getMemRefFields()) {
         auto memrefTp = field.getType().cast<MemRefType>();
         auto size = rewriter.create<memref::DimOp>(loc, field, 0);
-        auto copied = rewriter.create<memref::AllocOp>(loc, memrefTp, ValueRange{size});
+        auto copied =
+            rewriter.create<memref::AllocOp>(loc, memrefTp, ValueRange{size});
         rewriter.create<memref::CopyOp>(loc, field, copied);
         fields.push_back(copied);
       }
+      // Reuses specifier.
       fields.push_back(desc.getSpecifier());
       assert(fields.size() == desc.getNumFields());
       rewriter.replaceOp(op, genTuple(rewriter, loc, resType, fields));
diff --git a/mlir/test/Dialect/SparseTensor/codegen_sparse_alloc.mlir b/mlir/test/Dialect/SparseTensor/codegen_sparse_alloc.mlir
new file mode 100644
--- /dev/null
+++ b/mlir/test/Dialect/SparseTensor/codegen_sparse_alloc.mlir
@@ -0,0 +1,44 @@
+// RUN: mlir-opt %s --sparse-tensor-codegen --canonicalize --cse | FileCheck %s
+
+#CSR = #sparse_tensor.encoding<{ dimLevelType = ["dense", "compressed"]}>
+#COO = #sparse_tensor.encoding<{ dimLevelType = ["compressed-nu", "singleton"]}>
+
+// CHECK-LABEL:   func.func @sparse_alloc_copy_CSR(
+// CHECK-SAME:      %[[VAL_0:.*0]]: memref<?xindex>,
+// CHECK-SAME:      %[[VAL_1:.*1]]: memref<?xindex>,
+// CHECK-SAME:      %[[VAL_2:.*2]]: memref<?xf32>,
+// CHECK-SAME:      %[[VAL_3:.*]]: !sparse_tensor.storage_specifier<#{{.*}}>) -> (memref<?xindex>, memref<?xindex>, memref<?xf32>, !sparse_tensor.storage_specifier<#{{.*}}>) {
+// CHECK:           %[[VAL_4:.*]] = arith.constant 0 : index
+// CHECK:           %[[VAL_5:.*]] = memref.dim %[[VAL_0]], %[[VAL_4]] : memref<?xindex>
+// CHECK:           %[[VAL_6:.*]] = memref.alloc(%[[VAL_5]]) : memref<?xindex>
+// CHECK:           memref.copy %[[VAL_0]], %[[VAL_6]] : memref<?xindex> to memref<?xindex>
+// CHECK:           %[[VAL_7:.*]] = memref.dim %[[VAL_1]], %[[VAL_4]] : memref<?xindex>
+// CHECK:           %[[VAL_8:.*]] = memref.alloc(%[[VAL_7]]) : memref<?xindex>
+// CHECK:           memref.copy %[[VAL_1]], %[[VAL_8]] : memref<?xindex> to memref<?xindex>
+// CHECK:           %[[VAL_9:.*]] = memref.dim %[[VAL_2]], %[[VAL_4]] : memref<?xf32>
+// CHECK:           %[[VAL_10:.*]] = memref.alloc(%[[VAL_9]]) : memref<?xf32>
+// CHECK:           memref.copy %[[VAL_2]], %[[VAL_10]] : memref<?xf32> to memref<?xf32>
+func.func @sparse_alloc_copy_CSR(%arg0: tensor<2x2xf32, #CSR>) -> tensor<2x2xf32, #CSR> {
+  %0 = bufferization.alloc_tensor() copy(%arg0) : tensor<2x2xf32, #CSR>
+  "test.sink"(%0) : (tensor<2x2xf32, #CSR>) -> ()
+}
+
+// CHECK-LABEL:   func.func @sparse_alloc_copy_COO(
+// CHECK-SAME:      %[[VAL_0:.*0]]: memref<?xindex>,
+// CHECK-SAME:      %[[VAL_1:.*1]]: memref<?xindex>,
+// CHECK-SAME:      %[[VAL_2:.*2]]: memref<?xf32>,
+// CHECK-SAME:      %[[VAL_3:.*]]: !sparse_tensor.storage_specifier<#{{.*}}>) -> (memref<?xindex>, memref<?xindex>, memref<?xf32>, !sparse_tensor.storage_specifier<#{{.*}}>) {
+// CHECK:           %[[VAL_4:.*]] = arith.constant 0 : index
+// CHECK:           %[[VAL_5:.*]] = memref.dim %[[VAL_0]], %[[VAL_4]] : memref<?xindex>
+// CHECK:           %[[VAL_6:.*]] = memref.alloc(%[[VAL_5]]) : memref<?xindex>
+// CHECK:           memref.copy %[[VAL_0]], %[[VAL_6]] : memref<?xindex> to memref<?xindex>
+// CHECK:           %[[VAL_7:.*]] = memref.dim %[[VAL_1]], %[[VAL_4]] : memref<?xindex>
+// CHECK:           %[[VAL_8:.*]] = memref.alloc(%[[VAL_7]]) : memref<?xindex>
+// CHECK:           memref.copy %[[VAL_1]], %[[VAL_8]] : memref<?xindex> to memref<?xindex>
+// CHECK:           %[[VAL_9:.*]] = memref.dim %[[VAL_2]], %[[VAL_4]] : memref<?xf32>
+// CHECK:           %[[VAL_10:.*]] = memref.alloc(%[[VAL_9]]) : memref<?xf32>
+// CHECK:           memref.copy %[[VAL_2]], %[[VAL_10]] : memref<?xf32> to memref<?xf32>
+func.func @sparse_alloc_copy_COO(%arg0: tensor<2x2xf32, #COO>) -> tensor<2x2xf32, #COO> {
+  %0 = bufferization.alloc_tensor() copy(%arg0) : tensor<2x2xf32, #COO>
+  "test.sink"(%0) : (tensor<2x2xf32, #COO>) -> ()
+}