Merge pull request #25686 from Kumataro:fix25674

Suppress build warnings for GCC14 #25686

Close #25674

### Pull Request Readiness Checklist

See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request

- [x] I agree to contribute to the project under Apache 2 License.
- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [x] The PR is proposed to the proper branch
- [x] There is a reference to the original bug report and related work
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [ ] The feature is well documented and sample code can be built with the project CMake

modules/core/test/test_mat.cpp

@@ -601,7 +601,7 @@ static void setValue(SparseMat& M, const int* idx, double value, RNG& rng)
         CV_Error(cv::Error::StsUnsupportedFormat, "");
 }
 
-#if defined(__GNUC__) && (__GNUC__ == 11 || __GNUC__ == 12 || __GNUC__ == 13)
+#if defined(__GNUC__) && (__GNUC__ >= 11)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Warray-bounds"
 #endif

modules/dnn/src/tensorflow/tf_importer.cpp

@@ -260,7 +260,7 @@ const tensorflow::AttrValue& getLayerAttr(const tensorflow::NodeDef &layer, cons
     return layer.attr().at(name);
 }
 
-#if defined(__GNUC__) && (__GNUC__ == 13)
+#if defined(__GNUC__) && (__GNUC__ >= 13)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wdangling-reference"
 #endif

modules/dnn/src/torch/torch_importer.cpp

@@ -902,7 +902,7 @@ struct TorchImporter
             {
                 readTorchTable(scalarParams, tensorParams);
 
-                float power;
+                float power = 1.0f;
                 if (nnName == "Square") power = 2.0f;
                 else if (nnName == "Sqrt") power = 0.5f;
                 else if (nnName == "Power") power = scalarParams.get<float>("pow", 1.0f);

modules/gapi/src/compiler/passes/exec.cpp

@@ -158,7 +158,7 @@ namespace
         std::unordered_set<CycleCausers, CycleHasher> cycle_causers;
     };
 
-#if defined(__GNUC__) && (__GNUC__ == 13)
+#if defined(__GNUC__) && (__GNUC__ >= 13)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wdangling-reference"
 #endif

modules/gapi/src/streaming/onevpl/file_data_provider.hpp

@@ -21,7 +21,7 @@ namespace onevpl {
 
 // With gcc13, std::unique_ptr(FILE, decltype(&fclose)> causes ignored-attributes warning.
 // See https://stackoverflow.com/questions/76849365/can-we-add-attributes-to-standard-function-declarations-without-breaking-standar
-#if defined(__GNUC__) && (__GNUC__ == 13)
+#if defined(__GNUC__) && (__GNUC__ >= 13)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wignored-attributes"
 #endif

modules/ts/include/opencv2/ts/ts_gtest.h

@@ -21317,6 +21317,13 @@ AssertionResult CmpHelperEQFailure(const char* lhs_expression,
                    false);
 }
 
+// See https://github.com/opencv/opencv/issues/25674
+// Disable optimization for workaround to mis-branch for GCC14.
+#if defined(__GNUC__) && (__GNUC__ == 14)
+#pragma GCC push_options
+#pragma GCC optimize ("O0")
+#endif
+
 // The helper function for {ASSERT|EXPECT}_EQ.
 template <typename T1, typename T2>
 AssertionResult CmpHelperEQ(const char* lhs_expression,
@@ -21330,6 +21337,10 @@ AssertionResult CmpHelperEQ(const char* lhs_expression,
   return CmpHelperEQFailure(lhs_expression, rhs_expression, lhs, rhs);
 }
 
+#if defined(__GNUC__) && (__GNUC__ == 14)
+#pragma GCC pop_options
+#endif
+
 // With this overloaded version, we allow anonymous enums to be used
 // in {ASSERT|EXPECT}_EQ when compiled with gcc 4, as anonymous enums
 // can be implicitly cast to BiggestInt.