[clang][nfc] refactor Module::Header to use OptionalFileEntryRef

Refactor the `Module::Header` class to use an `OptionalFileEntryRef`
instead of a `FileEntry*`. This is preparation for refactoring the
`TopHeaderNames` to use `FileEntryRef` so that we preserve the
lookup path of the headers when serializing.

This is mostly based on https://reviews.llvm.org/D90497

Reviewed By: jansvoboda11

Differential Revision: https://reviews.llvm.org/D142113

1 files changed, 2 insertions, 2 deletions

diff --git a/clang/lib/Sema/SemaModule.cpp b/clang/lib/Sema/SemaModule.cpp
index 64dce281..8fa31ea 100644
--- a/clang/lib/Sema/SemaModule.cpp
+++ b/clang/lib/Sema/SemaModule.cpp
@@ -120,12 +120,12 @@ void Sema::HandleStartOfHeaderUnit() {
   // TODO: Make the C++20 header lookup independent.
   // When the input is pre-processed source, we need a file ref to the original
   // file for the header map.
-  auto F = SourceMgr.getFileManager().getFile(HUName);
+  auto F = SourceMgr.getFileManager().getOptionalFileRef(HUName);
   // For the sake of error recovery (if someone has moved the original header
   // after creating the pre-processed output) fall back to obtaining the file
   // ref for the input file, which must be present.
   if (!F)
-    F = SourceMgr.getFileEntryForID(SourceMgr.getMainFileID());
+    F = SourceMgr.getFileEntryRefForID(SourceMgr.getMainFileID());
   assert(F && "failed to find the header unit source?");
   Module::Header H{HUName.str(), HUName.str(), *F};
   auto &Map = PP.getHeaderSearchInfo().getModuleMap();