[clang] NFC: Use DirectoryEntryRef in `FileManager::getCanonicalNam…

…e()`

This patch removes the last use of deprecated `DirectoryEntry::getName()`.

Depends on D151855.

Reviewed By: benlangmuir

Differential Revision: https://reviews.llvm.org/D151922

clang-tools-extra/clang-move/Move.cpp

@@ -92,7 +92,7 @@ std::string MakeAbsolutePath(const SourceManager &SM, StringRef Path) {
                  << '\n';
   // Handle symbolic link path cases.
   // We are trying to get the real file path of the symlink.
-  auto Dir = SM.getFileManager().getDirectory(
+  auto Dir = SM.getFileManager().getOptionalDirectoryRef(
       llvm::sys::path::parent_path(AbsolutePath.str()));
   if (Dir) {
     StringRef DirName = SM.getFileManager().getCanonicalName(*Dir);

clang-tools-extra/clangd/SourceCode.cpp

@@ -537,7 +537,7 @@ std::optional<std::string> getCanonicalPath(const FileEntryRef F,
   //
   //  The file path of Symbol is "/project/src/foo.h" instead of
   //  "/tmp/build/foo.h"
-  if (auto Dir = FileMgr.getDirectory(
+  if (auto Dir = FileMgr.getOptionalDirectoryRef(
           llvm::sys::path::parent_path(FilePath))) {
     llvm::SmallString<128> RealPath;
     llvm::StringRef DirName = FileMgr.getCanonicalName(*Dir);

clang/include/clang/Basic/FileManager.h

@@ -320,7 +320,7 @@ class FileManager : public RefCountedBase<FileManager> {
   /// This is a very expensive operation, despite its results being cached,
   /// and should only be used when the physical layout of the file system is
   /// required, which is (almost) never.
-  StringRef getCanonicalName(const DirectoryEntry *Dir);
+  StringRef getCanonicalName(DirectoryEntryRef Dir);
 
   /// Retrieve the canonical name for a given file.
   ///

clang/lib/Basic/FileManager.cpp

@@ -631,16 +631,15 @@ void FileManager::GetUniqueIDMapping(
     UIDToFiles[VFE->getUID()] = VFE;
 }
 
-StringRef FileManager::getCanonicalName(const DirectoryEntry *Dir) {
-  llvm::DenseMap<const void *, llvm::StringRef>::iterator Known
-    = CanonicalNames.find(Dir);
+StringRef FileManager::getCanonicalName(DirectoryEntryRef Dir) {
+  auto Known = CanonicalNames.find(Dir);
   if (Known != CanonicalNames.end())
     return Known->second;
 
-  StringRef CanonicalName(Dir->getName());
+  StringRef CanonicalName(Dir.getName());
 
   SmallString<4096> CanonicalNameBuf;
-  if (!FS->getRealPath(Dir->getName(), CanonicalNameBuf))
+  if (!FS->getRealPath(Dir.getName(), CanonicalNameBuf))
     CanonicalName = CanonicalNameBuf.str().copy(CanonicalNameStorage);
 
   CanonicalNames.insert({Dir, CanonicalName});

clang/lib/Lex/ModuleMap.cpp

@@ -1319,9 +1319,9 @@ ModuleMap::canonicalizeModuleMapPath(SmallVectorImpl<char> &Path) {
   }
 
   FileManager &FM = SourceMgr.getFileManager();
-  auto DirEntry = FM.getDirectory(Dir.empty() ? "." : Dir);
+  auto DirEntry = FM.getDirectoryRef(Dir.empty() ? "." : Dir);
   if (!DirEntry)
-    return DirEntry.getError();
+    return llvm::errorToErrorCode(DirEntry.takeError());
 
   // Canonicalize the directory.
   StringRef CanonicalDir = FM.getCanonicalName(*DirEntry);