--- a/clang/lib/CodeGen/CGBuilder.h	Mon May 25 11:50:15 2020 +0900
+++ b/clang/lib/CodeGen/CGBuilder.h	Mon May 25 11:55:54 2020 +0900
@@ -22,16 +22,15 @@
 /// This is an IRBuilder insertion helper that forwards to
 /// CodeGenFunction::InsertHelper, which adds necessary metadata to
 /// instructions.
-class CGBuilderInserter : protected llvm::IRBuilderDefaultInserter {
+class CGBuilderInserter final : public llvm::IRBuilderDefaultInserter {
 public:
   CGBuilderInserter() = default;
   explicit CGBuilderInserter(CodeGenFunction *CGF) : CGF(CGF) {}
 
-protected:
   /// This forwards to CodeGenFunction::InsertHelper.
   void InsertHelper(llvm::Instruction *I, const llvm::Twine &Name,
                     llvm::BasicBlock *BB,
-                    llvm::BasicBlock::iterator InsertPt) const;
+                    llvm::BasicBlock::iterator InsertPt) const override;
 private:
   CodeGenFunction *CGF = nullptr;
 };