[MSLITE] Fix bug of batchnorm_convert_scale_pass

mindspore/lite/tools/converter/legacy_optimizer/graph/batchnorm_convert_scale_pass.cc

@@ -40,6 +40,7 @@ namespace {
 constexpr const float EPS = 1e-8;
 constexpr const float EPS_DEFAULT_FLOAT = 1e-8;
 constexpr const float POW_NUM = 0.5;
+constexpr uint32_t kQuadrupleNum = 4;
 }  // namespace
 
 STATUS BatchNormConvertScalePass::Run(MetaGraphT *graph) {
@@ -52,6 +53,11 @@ STATUS BatchNormConvertScalePass::Run(MetaGraphT *graph) {
       continue;
     }
 
+    auto input_index = node->inputIndex.at(0);
+    if (graph->allTensors.at(input_index)->dims.empty()) {
+      MS_LOG(WARNING) << "The shape of input tensor is uncertain.";
+      return RET_OK;
+    }
     auto status = GenNewScaleTensor(graph, node);
     if (status != RET_OK) {
       MS_LOG(ERROR) << "GenNewScaleTensor failed: " << status;
@@ -75,9 +81,13 @@ STATUS BatchNormConvertScalePass::ConvertBNToScale(MetaGraphT *graph, const std:
     return RET_ERROR;
   }
   //  after fusion bn must NHWC
+  auto input0 = bnNode->inputIndex.at(0);
+  if (graph->allTensors.at(input0)->dims.size() == kQuadrupleNum) {
     scaleParam->axis = -1;
+  } else {
+    scaleParam->axis = 1;
+  }
   bnNode->primitive->value.value = scaleParam.release();
-  auto input0 = bnNode->inputIndex.at(0);
   bnNode->inputIndex.clear();
   bnNode->inputIndex.push_back(input0);
   graph->allTensors.emplace_back(std::move(newScaleWeightTensor));