[clang][lex] NFCI: Use DirectoryEntryRef in FrameworkCacheEntry

This patch changes the member of `FrameworkCacheEntry` from `const DirectoryEntry *` to `Optional<DirectoryEntryRef>` in order to remove uses of the deprecated `DirectoryEntry::getName()`.

Reviewed By: bnbarham

Differential Revision: https://reviews.llvm.org/D123854

Author: jansvoboda11

clang/include/clang/Lex/HeaderSearch.h

@@ -155,7 +155,7 @@ class ExternalHeaderFileInfoSource {
 /// This structure is used to record entries in our framework cache.
 struct FrameworkCacheEntry {
   /// The directory entry which should be used for the cached framework.
-  const DirectoryEntry *Directory;
+  Optional<DirectoryEntryRef> Directory;
 
   /// Whether this framework has been "user-specified" to be treated as if it
   /// were a system framework (even if it was found outside a system framework

clang/lib/Lex/HeaderSearch.cpp

@@ -582,7 +582,7 @@ Optional<FileEntryRef> DirectoryLookup::DoFrameworkLookup(
     HS.LookupFrameworkCache(Filename.substr(0, SlashPos));
 
   // If it is known and in some other directory, fail.
-  if (CacheEntry.Directory && CacheEntry.Directory != getFrameworkDir())
+  if (CacheEntry.Directory && CacheEntry.Directory != getFrameworkDirRef())
     return None;
 
   // Otherwise, construct the path to this framework dir.
@@ -611,7 +611,7 @@ Optional<FileEntryRef> DirectoryLookup::DoFrameworkLookup(
 
     // Otherwise, if it does, remember that this is the right direntry for this
     // framework.
-    CacheEntry.Directory = getFrameworkDir();
+    CacheEntry.Directory = getFrameworkDirRef();
 
     // If this is a user search directory, check if the framework has been
     // user-specified as a system framework.
@@ -626,7 +626,7 @@ Optional<FileEntryRef> DirectoryLookup::DoFrameworkLookup(
 
   // Set out flags.
   InUserSpecifiedSystemFramework = CacheEntry.IsUserSpecifiedSystemFramework;
-  IsFrameworkFound = CacheEntry.Directory;
+  IsFrameworkFound = CacheEntry.Directory.hasValue();
 
   if (RelativePath) {
     RelativePath->clear();
@@ -1184,13 +1184,13 @@ Optional<FileEntryRef> HeaderSearch::LookupSubframeworkHeader(
     ++NumSubFrameworkLookups;
 
     // If the framework dir doesn't exist, we fail.
-    auto Dir = FileMgr.getDirectory(FrameworkName);
+    auto Dir = FileMgr.getOptionalDirectoryRef(FrameworkName);
     if (!Dir)
       return None;
 
     // Otherwise, if it does, remember that this is the right direntry for this
     // framework.
-    CacheLookup.second.Directory = *Dir;
+    CacheLookup.second.Directory = Dir;
   }