[clang] NFCI: Use FileEntryRef in ModuleMap::InferredModuleAllowedBy

(cherry picked from commit 1b07d43)

Author: jansvoboda11

clang/include/clang/Lex/ModuleMap.h

@@ -270,8 +270,8 @@ class ModuleMap {
     Attributes Attrs;
 
     /// If \c InferModules is non-zero, the module map file that allowed
-    /// inferred modules.  Otherwise, nullptr.
-    const FileEntry *ModuleMapFile;
+    /// inferred modules.  Otherwise, nullopt.
+    OptionalFileEntryRef ModuleMapFile;
 
     /// The names of modules that cannot be inferred within this
     /// directory.
@@ -286,7 +286,8 @@ class ModuleMap {
 
   /// A mapping from an inferred module to the module map that allowed the
   /// inference.
-  llvm::DenseMap<const Module *, const FileEntry *> InferredModuleAllowedBy;
+  // FIXME: Consider making the values non-optional.
+  llvm::DenseMap<const Module *, OptionalFileEntryRef> InferredModuleAllowedBy;
 
   llvm::DenseMap<const Module *, AdditionalModMapsSet> AdditionalModMaps;
 
@@ -641,7 +642,7 @@ class ModuleMap {
   /// getContainingModuleMapFile().
   OptionalFileEntryRef getModuleMapFileForUniquing(const Module *M) const;
 
-  void setInferredModuleAllowedBy(Module *M, const FileEntry *ModMap);
+  void setInferredModuleAllowedBy(Module *M, OptionalFileEntryRef ModMap);
 
   /// Canonicalize \p Path in a manner suitable for a module map file. In
   /// particular, this canonicalizes the parent directory separately from the

clang/lib/Frontend/FrontendAction.cpp

@@ -533,15 +533,15 @@ static Module *prepareToBuildModule(CompilerInstance &CI,
   StringRef OriginalModuleMapName = CI.getFrontendOpts().OriginalModuleMap;
   if (!OriginalModuleMapName.empty()) {
     auto OriginalModuleMap =
-        CI.getFileManager().getFile(OriginalModuleMapName,
-                                    /*openFile*/ true);
+        CI.getFileManager().getOptionalFileRef(OriginalModuleMapName,
+                                               /*openFile*/ true);
     if (!OriginalModuleMap) {
       CI.getDiagnostics().Report(diag::err_module_map_not_found)
         << OriginalModuleMapName;
       return nullptr;
     }
-    if (*OriginalModuleMap != CI.getSourceManager().getFileEntryForID(
-                                 CI.getSourceManager().getMainFileID())) {
+    if (*OriginalModuleMap != CI.getSourceManager().getFileEntryRefForID(
+                                  CI.getSourceManager().getMainFileID())) {
       M->IsInferred = true;
       CI.getPreprocessor().getHeaderSearchInfo().getModuleMap()
         .setInferredModuleAllowedBy(M, *OriginalModuleMap);

clang/lib/Lex/ModuleMap.cpp

@@ -642,7 +642,7 @@ ModuleMap::findOrCreateModuleForHeaderInUmbrellaDir(FileEntryRef File) {
       UmbrellaModule = UmbrellaModule->Parent;
 
     if (UmbrellaModule->InferSubmodules) {
-      OptionalFileEntryRefDegradesToFileEntryPtr UmbrellaModuleMap =
+      OptionalFileEntryRef UmbrellaModuleMap =
           getModuleMapFileForUniquing(UmbrellaModule);
 
       // Infer submodules for each of the directories we found between
@@ -1022,7 +1022,7 @@ Module *ModuleMap::inferFrameworkModule(DirectoryEntryRef FrameworkDir,
 
   // If the framework has a parent path from which we're allowed to infer
   // a framework module, do so.
-  const FileEntry *ModuleMapFile = nullptr;
+  OptionalFileEntryRef ModuleMapFile;
   if (!Parent) {
     // Determine whether we're allowed to infer a module map.
     bool canInfer = false;
@@ -1323,13 +1323,13 @@ OptionalFileEntryRef
 ModuleMap::getModuleMapFileForUniquing(const Module *M) const {
   if (M->IsInferred) {
     assert(InferredModuleAllowedBy.count(M) && "missing inferred module map");
-    // FIXME: Update InferredModuleAllowedBy to use FileEntryRef.
-    return InferredModuleAllowedBy.find(M)->second->getLastRef();
+    return InferredModuleAllowedBy.find(M)->second;
   }
   return getContainingModuleMapFile(M);
 }
 
-void ModuleMap::setInferredModuleAllowedBy(Module *M, const FileEntry *ModMap) {
+void ModuleMap::setInferredModuleAllowedBy(Module *M,
+                                           OptionalFileEntryRef ModMap) {
   assert(M->IsInferred && "module not inferred");
   InferredModuleAllowedBy[M] = ModMap;
 }