fix analyzer_rnn2_test

test=develop

paddle/fluid/inference/tests/api/analyzer_rnn2_tester.cc

@@ -18,12 +18,12 @@ namespace paddle {
 namespace inference {
 
 using namespace framework;  // NOLINT
+static std::vector<float> result_data;
 
 struct DataRecord {
   std::vector<std::vector<std::vector<float>>> link_step_data_all;
   std::vector<size_t> lod;
   std::vector<std::vector<float>> rnn_link_data;
-  std::vector<float> result_data;
   size_t num_samples;  // total number of samples
   size_t batch_iter{0};
   size_t batch_size{1};
@@ -57,6 +57,7 @@ struct DataRecord {
     std::ifstream file(path);
     std::string line;
     int num_lines = 0;
+    result_data.clear();
     while (std::getline(file, line)) {
       num_lines++;
       std::vector<std::string> data;
@@ -135,13 +136,12 @@ TEST(Analyzer_rnn2, profile) {
 
   if (FLAGS_num_threads == 1 && !FLAGS_test_all_data) {
     // the first inference result
-    DataRecord data(FLAGS_infer_data, FLAGS_batch_size);
     PADDLE_ENFORCE_GT(outputs.size(), 0);
     size_t size = GetSize(outputs[0]);
     PADDLE_ENFORCE_GT(size, 0);
     float *result = static_cast<float *>(outputs[0].data.data());
     for (size_t i = 0; i < size; i++) {
-      EXPECT_NEAR(result[i], data.result_data[i], 1e-3);
+      EXPECT_NEAR(result[i], result_data[i], 1e-3);
     }
   }
 }