diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -519,8 +519,9 @@
   // a relative path, so we look into the actual file entry for the main
   // file to determine the real absolute path for the file.
   std::string MainFileDir;
-  if (const FileEntry *MainFile = SM.getFileEntryForID(SM.getMainFileID())) {
-    MainFileDir = std::string(MainFile->getDir()->getName());
+  if (Optional<FileEntryRef> MainFile =
+          SM.getFileEntryRefForID(SM.getMainFileID())) {
+    MainFileDir = std::string(MainFile->getDir().getName());
     if (!llvm::sys::path::is_absolute(MainFileName)) {
       llvm::SmallString<1024> MainFileDirSS(MainFileDir);
       llvm::sys::path::append(MainFileDirSS, MainFileName);
diff --git a/clang/lib/CodeGen/CGObjCGNU.cpp b/clang/lib/CodeGen/CGObjCGNU.cpp
--- a/clang/lib/CodeGen/CGObjCGNU.cpp
+++ b/clang/lib/CodeGen/CGObjCGNU.cpp
@@ -3862,9 +3862,10 @@
 
     // The path to the source file where this module was declared
     SourceManager &SM = CGM.getContext().getSourceManager();
-    const FileEntry *mainFile = SM.getFileEntryForID(SM.getMainFileID());
+    Optional<FileEntryRef> mainFile =
+        SM.getFileEntryRefForID(SM.getMainFileID());
     std::string path =
-      (Twine(mainFile->getDir()->getName()) + "/" + mainFile->getName()).str();
+        (mainFile->getDir().getName() + "/" + mainFile->getName()).str();
     module.add(MakeConstantString(path, ".objc_source_file_name"));
     module.add(symtab);