!14353 [MS][LITE] tensor data type support string && tensor

From: @jianghui58
Reviewed-by: @hangangqiang,@jpc_chenjianping
Signed-off-by: @hangangqiang

mindspore/core/ir/tensor.cc

@@ -447,6 +447,10 @@ TensorDataPtr MakeTensorData(TypeId data_type, const ShapeVector &shape, const A
       return std::make_shared<TensorDataImpl<float>>(shape, args...);
     case kNumberTypeFloat64:
       return std::make_shared<TensorDataImpl<double>>(shape, args...);
+    case kObjectTypeString:
+      return std::make_shared<TensorDataImpl<uint8_t>>(shape, args...);
+    case kObjectTypeTensorType:
+      return std::make_shared<TensorDataImpl<int>>(shape, args...);
     default:
       break;
   }
@@ -549,8 +553,8 @@ Tensor &Tensor::AssignValue(const Tensor &tensor) {
 abstract::AbstractBasePtr Tensor::ToAbstract() {
   auto tens = shared_from_base<Tensor>();
   auto dtype = tens->Dtype();
-  if (!IsSubType(dtype, kNumber)) {
-    MS_LOG(EXCEPTION) << "Expect tensor type kNumber but got: " << dtype->ToString() << ".";
+  if (!IsSubType(dtype, kNumber) && !IsSubType(dtype, kString) && !IsSubType(dtype, kTensorType)) {
+    MS_LOG(EXCEPTION) << "Expect tensor type kNumber or kString or kTensor but got: " << dtype->ToString() << ".";
   }
   auto tensor_shape = tens->shape();
   auto abs_tensor = std::make_shared<abstract::AbstractTensor>(dtype, tensor_shape);