From 70dce9caf6c4ddfe519ff303046164980b386cef Mon Sep 17 00:00:00 2001
From: Evgeny Kotov <evgeny.kotov@intel.com>
Date: Tue, 2 Apr 2024 21:12:51 +0200
Subject: [PATCH] fix loop output init

---
 src/frontends/tensorflow/src/tf_utils.cpp           |  2 +-
 .../tensorflow/tests/convert_tricky_models.cpp      | 13 ++++++++++---
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/frontends/tensorflow/src/tf_utils.cpp b/src/frontends/tensorflow/src/tf_utils.cpp
index b804d09b8b0a6a..3f1ab8a80a11ad 100644
--- a/src/frontends/tensorflow/src/tf_utils.cpp
+++ b/src/frontends/tensorflow/src/tf_utils.cpp
@@ -579,11 +579,11 @@ ov::OutputVector create_loop_for_tf_while(const std::string& while_node_name,
     // set external outputs for Loop node
     // do not get execution condition outside of the Loop node
     for (size_t output_ind = 0; output_ind < body_condition_output_idx; ++output_ind) {
-        const auto loop_output = loop->get_iter_value(body_results[output_ind]);
         auto parent_parameter = get_parent_parameter(body_results[output_ind]);
         if (parent_parameter) {
             loop_outputs.push_back(loop_input_nodes[parent_parameter->get_instance_id()]);
         } else {
+            const auto loop_output = loop->get_iter_value(body_results[output_ind]);
             loop_outputs.push_back(loop_output);
         }
     }
diff --git a/src/frontends/tensorflow/tests/convert_tricky_models.cpp b/src/frontends/tensorflow/tests/convert_tricky_models.cpp
index 470292780a28c5..d60408647da013 100644
--- a/src/frontends/tensorflow/tests/convert_tricky_models.cpp
+++ b/src/frontends/tensorflow/tests/convert_tricky_models.cpp
@@ -854,7 +854,6 @@ TEST_F(FrontEndConversionWithReferenceTestsF, UnitializedVariableV2AsInput) {
 }
 
 TEST_F(FrontEndConversionWithReferenceTestsF, LoopWithInvariant) {
-    std::shared_ptr<Model> real_loop_model;
     { model = convert_model("loop_with_invariant/loop_with_invariant.pb"); }
     {
         ParameterVector model_inputs;
@@ -971,17 +970,21 @@ TEST_F(FrontEndConversionWithReferenceTestsF, LoopWithInvariant) {
         loop->set_function(loop_body);
         loop->set_special_body_ports(ov::op::v5::Loop::SpecialBodyPorts{-1, 6});
 
+        OutputVector merged_outputs;
         {
             auto input_const = make_shared<v0::Constant>(element::i32, Shape{}, 0);
             loop->set_merged_input(body_model_inputs[0], input_const, body_model_outputs[0]);
+            merged_outputs.emplace_back(body_model_outputs[0]);
         }
         {
             auto input_const = make_shared<v0::Constant>(element::i32, Shape{}, 1);
             loop->set_merged_input(body_model_inputs[2], input_const, body_model_outputs[2]);
+            merged_outputs.emplace_back(body_model_outputs[2]);
         }
         {
             auto input_const = make_shared<v0::Constant>(element::i32, Shape{}, 1);
             loop->set_merged_input(body_model_inputs[3], input_const, body_model_outputs[3]);
+            merged_outputs.emplace_back(body_model_outputs[3]);
         }
 
         {
@@ -1000,13 +1003,17 @@ TEST_F(FrontEndConversionWithReferenceTestsF, LoopWithInvariant) {
         }
 
         for (const auto& loop_body_output : body_model_outputs) {
-            if (loop_body_output == while_identity)
+            const auto it =
+                std::find_if(merged_outputs.begin(), merged_outputs.end(), [loop_body_output](Output<Node>& output) {
+                    return output == loop_body_output;
+                });
+            if (it == merged_outputs.end())
                 continue;
             loop->get_iter_value(loop_body_output);
         }
 
         auto const_multiply = make_shared<v0::Constant>(element::i32, Shape{}, Shape{1});
-        auto multiply = make_shared<v1::Multiply>(loop->output(3), const_multiply);
+        auto multiply = make_shared<v1::Multiply>(loop->output(2), const_multiply);
         auto result = make_shared<v0::Result>(multiply);
 
         model_ref = make_shared<Model>(OutputVector{result}, model_inputs);