fix(serialization): when the dump fbsv2 model is used, the middle_tensor becomes optional

GitOrigin-RevId: 3d0bbfd44136c39f50c18cd4a3da5c87fcca50fb

src/serialization/impl/serializer_oss_v2.cpp

@@ -161,8 +161,16 @@ flatbuffers::Offset<fbs::v2::MiddleTensor> GraphDumperOSSV2::build_middle_tensor
         auto fformat = build_tensor_format(layout.format);
         serialized_middle_tensor = fbs::v2::CreateMiddleTensor(
                 m_builder, fbname, fshape, fcomp_node, fdtype, fformat_type, fformat);
+    } else if (var.node()->shape().ndim > 0) {
+        auto shape = var.node()->shape();
+        auto fshape =
+                m_builder.CreateVectorScalarCast<uint32_t>(shape.shape, shape.ndim);
+        serialized_middle_tensor =
+                fbs::v2::CreateMiddleTensor(m_builder, fbname, fshape);
+
+    } else {
+        serialized_middle_tensor = fbs::v2::CreateMiddleTensor(m_builder, fbname);
     }
-    serialized_middle_tensor = fbs::v2::CreateMiddleTensor(m_builder, fbname);
     return serialized_middle_tensor;
 }
 
@@ -278,8 +286,12 @@ flatbuffers::Offset<fbs::v2::Operator> GraphDumperOSSV2::build_single_opr(
         v.reserve(m_cur_opr->output().size());
         for (auto out : m_cur_opr->output()) {
             if (!out->contain_flag(VarNode::Flag::VOLATILE_CONTENT)) {
-                auto fbs_out = build_middle_tensor(out);
-                m_model_middle_tensors.push_back(fbs_out);
+                if (m_config.keep_var_name >= 1) {
+                    auto fbs_out = build_middle_tensor(out);
+                    m_model_middle_tensors.push_back(fbs_out);
+                } else {
+                    m_model_middle_tensors.push_back(0);
+                }
                 m_var2midtensor_id[out] = m_model_middle_tensors.size() - 1;
                 v.emplace_back(m_var2midtensor_id.at(out));
             }
@@ -425,13 +437,19 @@ GraphDumper::DumpResult GraphDumperOSSV2::dump(
         }
     }
     auto fbs_output_alias = m_builder.CreateVector(output_vars_alias);
-    auto fb_mid_tensor = m_builder.CreateVector(m_model_middle_tensors);
+    flatbuffers::Offset<flatbuffers::Vector<
+            flatbuffers::Offset<mgb::serialization::fbs::v2::MiddleTensor>>>
+            fb_mid_tensor;
+    if (m_config.keep_var_name >= 1)
+        fb_mid_tensor = m_builder.CreateVector(m_model_middle_tensors);
 
     fbs::v2::ModelBuilder model(m_builder);
     model.add_mge_version(MGB_VERSION);
     model.add_model_version(m_version);
     model.add_oprs(fb_oprs);
-    model.add_middle_tensors(fb_mid_tensor);
+    if (m_config.keep_var_name >= 1) {
+        model.add_middle_tensors(fb_mid_tensor);
+    }
     model.add_output_vars_idx(fb_output_vars);
     model.add_output_alias(fbs_output_alias);
     model.add_nr_shared_tensor(m_nr_shared_tensor);