1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/LTO/LTO.cpp b/llvm/lib/LTO/LTO.cpp
index f867582454d..b5339cd61df 100644
--- a/llvm/lib/LTO/LTO.cpp
+++ b/llvm/lib/LTO/LTO.cpp
@@ -530,6 +530,7 @@ public:
   virtual Error wait() = 0;
 };
 
+namespace {
 class InProcessThinBackend : public ThinBackendProc {
   ThreadPool BackendThreadPool;
   AddStreamFn AddStream;
@@ -629,6 +630,7 @@ public:
       return Error::success();
   }
 };
+} // end anonymous namespace
 
 ThinBackend lto::createInProcessThinBackend(unsigned ParallelismLevel) {
   return [=](Config &Conf, ModuleSummaryIndex &CombinedIndex,
@@ -660,6 +662,7 @@ std::string lto::getThinLTOOutputFile(const std::string &Path,
   return NewPath.str();
 }
 
+namespace {
 class WriteIndexesThinBackend : public ThinBackendProc {
   std::string OldPrefix, NewPrefix;
   bool ShouldEmitImportsFiles;
@@ -717,6 +720,7 @@ public:
 
   Error wait() override { return Error::success(); }
 };
+} // end anonymous namespace
 
 ThinBackend lto::createWriteIndexesThinBackend(std::string OldPrefix,
                                                std::string NewPrefix,