[OVEP] Fix cov issues

onnxruntime/core/providers/openvino/openvino_provider_factory.cc

@@ -171,7 +171,7 @@ std::string ParseDeviceType(std::shared_ptr<OVCore> ov_core, const ProviderOptio
     if (!device_mode.empty()) {
       selected_device = device_mode + ":" + ov_luid_devices;
       for (const auto& dev_str : devices_to_check) {
-        const auto default_dev = split(dev_str, '.')[0];
+        const std::string default_dev = split(dev_str, '.')[0];
 
         if (ov_luid_devices.find(default_dev) == std::string::npos)
           selected_device = selected_device + "," + dev_str;
@@ -532,7 +532,7 @@ struct OpenVINO_Provider : Provider {
     std::string ov_device_string;
     if (is_meta_device_factory) {
       // Build up a meta device string based on the devices that are passed in. E.g. AUTO:NPU,GPU.0,CPU
-      ov_device_string = ov_meta_device_type;
+      ov_device_string = std::move(ov_meta_device_type);
       ov_device_string += ":";
     }
 
@@ -545,7 +545,7 @@ struct OpenVINO_Provider : Provider {
       prepend_comma = true;
     }
 
-    provider_options["device_type"] = ov_device_string;
+    provider_options["device_type"] = std::move(ov_device_string);
 
     // Parse provider info with the device type
     ProviderInfo pi;

onnxruntime/core/providers/openvino/ov_factory.cc

@@ -105,7 +105,7 @@ OrtStatus* OpenVINOEpPluginFactory::GetSupportedDevices(const OrtHardwareDevice*
     std::string ov_device_name;
     auto get_gpu_device_id = [&](const std::string& ov_device) {
       try {
-        auto device_id_str = ov_core_->get_property(ov_device, "GPU_DEVICE_ID").as<std::string>();
+        const std::string device_id_str = ov_core_->get_property(ov_device, "GPU_DEVICE_ID").as<std::string>();
         return static_cast<uint32_t>(std::stoul(device_id_str, nullptr, 0));
       } catch (ov::Exception&) {
         return 0u;  // If we can't get the GPU_DEVICE_ID info, we won't have a device ID.

onnxruntime/core/providers/openvino/ov_interface.h

@@ -136,7 +136,7 @@ class OVInferRequest {
       cached_binding.tensor_ptr.reset();
       auto ov_tensor = std::make_shared<ov::Tensor>(type, shape, const_cast<void*>(ort_ptr));
       ovInfReq.set_tensor(name, *ov_tensor);
-      cached_binding = {ov_tensor, ort_ptr};
+      cached_binding = {std::move(ov_tensor), ort_ptr};
     }
   }