Using const reference for C++17 range-based loop and freq used objects

Common/CPUDetect.cpp

@@ -426,7 +426,7 @@ void CPUInfo::Detect() {
 		if (GetLogicalProcessorInformation(&processors[0], &len)) {
 			num_cores = 0;
 			logical_cpu_count = 0;
-			for (auto processor : processors) {
+			for (const auto &processor : processors) {
 				if (processor.Relationship == RelationProcessorCore) {
 					num_cores++;
 					for (int i = 0; i < sizeof(processor.ProcessorMask) * 8; ++i) {

Common/GPU/Vulkan/VulkanLoader.cpp

@@ -404,7 +404,7 @@ bool VulkanMayBeAvailable() {
 		ERROR_LOG(G3D, "Enumerating VK extensions failed (%s)", VulkanResultToString(res));
 		goto bail;
 	}
-	for (auto iter : instanceExts) {
+	for (const auto &iter : instanceExts) {
 		INFO_LOG(G3D, "VulkanMaybeAvailable: Instance extension found: %s (%08x)", iter.extensionName, iter.specVersion);
 		if (platformSurfaceExtension && !strcmp(iter.extensionName, platformSurfaceExtension)) {
 			INFO_LOG(G3D, "VulkanMayBeAvailable: Found platform surface extension '%s'", platformSurfaceExtension);

Common/UI/Screen.cpp

@@ -259,10 +259,10 @@ void ScreenManager::sendMessage(UIMessage message, const char *value) {
 
 void ScreenManager::shutdown() {
 	std::lock_guard<std::recursive_mutex> guard(inputLock_);
-	for (auto layer : stack_)
+	for (const auto &layer : stack_)
 		delete layer.screen;
 	stack_.clear();
-	for (auto layer : nextStack_)
+	for (const auto &layer : nextStack_)
 		delete layer.screen;
 	nextStack_.clear();
 	delete overlayScreen_;

Core/Debugger/WebSocket/HLESubscriber.cpp

@@ -68,7 +68,7 @@ void WebSocketHLEThreadList(DebuggerRequest &req) {
 
 	JsonWriter &json = req.Respond();
 	json.pushArray("threads");
-	for (auto th : threads) {
+	for (const auto &th : threads) {
 		json.pushDict();
 		json.writeUint("id", th.id);
 		json.writeString("name", th.name);
@@ -114,7 +114,7 @@ static bool ThreadInfoForStatus(DebuggerRequest &req, DebugThreadInfo *result) {
 		return false;
 
 	auto threads = GetThreadsInfo();
-	for (auto t : threads) {
+	for (const auto &t : threads) {
 		if (t.id == threadID) {
 			*result = t;
 			return true;

Core/Dialog/SavedataParam.cpp

@@ -880,7 +880,7 @@ std::set<std::string> SavedataParam::GetSecureFileNames(const std::string &dirPa
 	auto entries = GetSFOEntries(dirPath);
 
 	std::set<std::string> secureFileNames;
-	for (auto entry : entries) {
+	for (const auto &entry : entries) {
 		char temp[14];
 		truncate_cpy(temp, entry.filename);
 		secureFileNames.insert(temp);

Core/HLE/sceFont.cpp

@@ -1192,7 +1192,7 @@ static int sceFontFindOptimumFont(u32 libHandle, u32 fontStylePtr, u32 errorCode
 	for (size_t i = 0; i < internalFonts.size(); i++) {
 		MatchQuality q = internalFonts[i]->MatchesStyle(*requestedStyle);
 		if (q != MATCH_NONE) {
-			auto matchStyle = internalFonts[i]->GetFontStyle();
+			const auto &matchStyle = internalFonts[i]->GetFontStyle();
 			if (requestedStyle->fontH > 0.0f) {
 				float hDist = fabs(matchStyle.fontHRes * matchStyle.fontH - hRes * requestedStyle->fontH);
 				if (hDist < nearestDist) {
@@ -1255,7 +1255,7 @@ static int sceFontFindFont(u32 libHandle, u32 fontStylePtr, u32 errorCodePtr) {
 	float hRes = requestedStyle->fontHRes > 0.0f ? (float)requestedStyle->fontHRes : fontLib->FontHRes();
 	for (size_t i = 0; i < internalFonts.size(); i++) {
 		if (internalFonts[i]->MatchesStyle(*requestedStyle) != MATCH_NONE) {
-			auto matchStyle = internalFonts[i]->GetFontStyle();
+			const auto &matchStyle = internalFonts[i]->GetFontStyle();
 			if (requestedStyle->fontH > 0.0f) {
 				float hDist = fabs(matchStyle.fontHRes * matchStyle.fontH - hRes * requestedStyle->fontH);
 				if (hDist > 0.001f) {

Core/HLE/sceKernelModule.cpp

@@ -354,7 +354,7 @@ public:
 				bool foundBroken = false;
 				auto importedFuncsState = importedFuncs;
 				importedFuncs.clear();
-				for (auto func : importedFuncsState) {
+				for (const auto &func : importedFuncsState) {
 					if (func.moduleName[KERNELOBJECT_MAX_NAME_LENGTH] != '\0' || !Memory::IsValidAddress(func.stubAddr)) {
 						foundBroken = true;
 					} else {

GPU/Common/PostShader.cpp

@@ -291,8 +291,8 @@ std::vector<const ShaderInfo *> GetPostShaderChain(const std::string &name) {
 
 std::vector<const ShaderInfo *> GetFullPostShadersChain(const std::vector<std::string> &names) {
 	std::vector<const ShaderInfo *> fullChain;
-	for (auto shaderName : names) {
-		auto shaderChain = GetPostShaderChain(shaderName);
+	for (const auto &shaderName : names) {
+		const auto &shaderChain = GetPostShaderChain(shaderName);
 		fullChain.insert(fullChain.end(), shaderChain.begin(), shaderChain.end());
 	}
 	return fullChain;

GPU/Common/VertexDecoderCommon.cpp

@@ -1501,7 +1501,7 @@ std::string VertexDecoder::GetString(DebugShaderStringType stringType) {
 			// No disassembler defined
 #endif
 			std::string buffer;
-			for (auto line : lines) {
+			for (const auto &line : lines) {
 				buffer += line;
 				buffer += "\n";
 			}

GPU/GLES/ShaderManagerGLES.cpp

@@ -1192,7 +1192,7 @@ void ShaderManagerGLES::SaveCache(const Path &filename, DrawEngineGLES *drawEngi
 	fsCache_.Iterate([&](const ShaderID &id, Shader *shader) {
 		fwrite(&id, 1, sizeof(id), f);
 	});
-	for (auto iter : linkedShaderCache_) {
+	for (const auto &iter : linkedShaderCache_) {
 		ShaderID vsid, fsid;
 		vsCache_.Iterate([&](const ShaderID &id, Shader *shader) {
 			if (iter.vs == shader)

UI/DevScreens.cpp

@@ -1114,17 +1114,17 @@ void JitCompareScreen::UpdateDisasm() {
 	// Alright. First generate the MIPS disassembly.
 	
 	// TODO: Need a way to communicate branch continuing.
-	for (auto line : debugInfo.origDisasm) {
+	for (const auto &line : debugInfo.origDisasm) {
 		leftDisasm_->Add(new TextView(line))->SetFocusable(true);
 	}
 
 	// TODO : When we have both target and IR, need a third column.
 	if (debugInfo.targetDisasm.size()) {
-		for (auto line : debugInfo.targetDisasm) {
+		for (const auto &line : debugInfo.targetDisasm) {
 			rightDisasm_->Add(new TextView(line))->SetFocusable(true);
 		}
 	} else {
-		for (auto line : debugInfo.irDisasm) {
+		for (const auto &line : debugInfo.irDisasm) {
 			rightDisasm_->Add(new TextView(line))->SetFocusable(true);
 		}
 	}
@@ -1377,7 +1377,7 @@ void ShaderViewScreen::CreateViews() {
 	std::vector<std::string> lines;
 	SplitString(gpu->DebugGetShaderString(id_, type_, SHADER_STRING_SOURCE_CODE), '\n', lines);
 
-	for (auto line : lines) {
+	for (const auto &line : lines) {
 		lineLayout->Add(new TextView(line, FLAG_DYNAMIC_ASCII | FLAG_WRAP_TEXT, true));
 	}
 

UI/GameScreen.cpp

@@ -511,7 +511,7 @@ bool GameScreen::isRecentGame(const Path &gamePath) {
 		return false;
 
 	const std::string resolved = File::ResolvePath(gamePath.ToString());
-	for (auto iso : g_Config.RecentIsos()) {
+	for (const auto &iso : g_Config.RecentIsos()) {
 		const std::string recent = File::ResolvePath(iso);
 		if (resolved == recent)
 			return true;

UI/ReportScreen.cpp

@@ -485,7 +485,7 @@ void ReportFinishScreen::ShowSuggestions() {
 		resultItems_->Clear();
 		bool shownConfig = false;
 		bool valid = false;
-		for (auto item : suggestions) {
+		for (const auto &item : suggestions) {
 			const char *suggestion = nullptr;
 			if (item == "Upgrade") {
 				suggestion = rp->T("SuggestionUpgrade", "Upgrade to a newer PPSSPP build");