5 files changed, 6 insertions, 6 deletions
diff --git a/clang/lib/Analysis/CFG.cpp b/clang/lib/Analysis/CFG.cpp
index 855017c7c15..d9349fc4092 100644
--- a/clang/lib/Analysis/CFG.cpp
+++ b/clang/lib/Analysis/CFG.cpp
@@ -825,7 +825,7 @@ private:
     // * Variable x is equal to the largest literal.
     // * Variable x is greater than largest literal.
     bool AlwaysTrue = true, AlwaysFalse = true;
-    for (llvm::APSInt Value : Values) {
+    for (const llvm::APSInt &Value : Values) {
       TryResult Res1, Res2;
       Res1 = analyzeLogicOperatorCondition(BO1, Value, L1);
       Res2 = analyzeLogicOperatorCondition(BO2, Value, L2);
diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 1eac1d27edd..39f78c30667 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -6541,7 +6541,7 @@ void gcc::Common::ConstructJob(Compilation &C, const JobAction &JA,
     }
   }
 
-  const std::string customGCCName = D.getCCCGenericGCCName();
+  const std::string &customGCCName = D.getCCCGenericGCCName();
   const char *GCCName;
   if (!customGCCName.empty())
     GCCName = customGCCName.c_str();
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 74e9fed7f12..a37e1cecae8 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -2416,7 +2416,7 @@ std::string CompilerInvocation::getModuleHash() const {
 
   // Extend the signature with the module file extensions.
   const FrontendOptions &frontendOpts = getFrontendOpts();
-  for (auto ext : frontendOpts.ModuleFileExtensions) {
+  for (const auto &ext : frontendOpts.ModuleFileExtensions) {
     code = ext->hashExtension(code);
   }
 
diff --git a/clang/lib/Frontend/DependencyFile.cpp b/clang/lib/Frontend/DependencyFile.cpp
index 93d4a803469..a9b61282378 100644
--- a/clang/lib/Frontend/DependencyFile.cpp
+++ b/clang/lib/Frontend/DependencyFile.cpp
@@ -177,7 +177,7 @@ public:
       SeenMissingHeader(false),
       IncludeModuleFiles(Opts.IncludeModuleFiles),
       OutputFormat(Opts.OutputFormat) {
-    for (auto ExtraDep : Opts.ExtraDeps) {
+    for (const auto &ExtraDep : Opts.ExtraDeps) {
       AddFilename(ExtraDep);
     }
   }
diff --git a/clang/lib/Sema/SemaLookup.cpp b/clang/lib/Sema/SemaLookup.cpp
index 2afb13e1db1..e761436683e 100644
--- a/clang/lib/Sema/SemaLookup.cpp
+++ b/clang/lib/Sema/SemaLookup.cpp
@@ -4060,8 +4060,8 @@ retry_lookup:
 
 void TypoCorrectionConsumer::performQualifiedLookups() {
   unsigned TypoLen = Typo->getName().size();
-  for (auto QR : QualifiedResults) {
-    for (auto NSI : Namespaces) {
+  for (const TypoCorrection &QR : QualifiedResults) {
+    for (const auto &NSI : Namespaces) {
       DeclContext *Ctx = NSI.DeclCtx;
       const Type *NSType = NSI.NameSpecifier->getAsType();