[clang] 1aefabe - [clang] Use the VFS to check the system framework marker (#160946)

[via cfe-commits]

Author: Jan Svoboda
Date: 2025-09-26T14:53:29-07:00
New Revision: 1aefabe5545bbf76a5218b998254033e71ed24f7

URL: https://github.com/llvm/llvm-project/commit/1aefabe5545bbf76a5218b998254033e71ed24f7
DIFF: https://github.com/llvm/llvm-project/commit/1aefabe5545bbf76a5218b998254033e71ed24f7.diff

LOG: [clang] Use the VFS to check the system framework marker (#160946)

This PR uses the VFS/`FileManager` to check the system framework marker
instead of going straight to the real file system. This matches the
behavior of other input files of the compiler.

Added: 
    

Modified: 
    clang/lib/Lex/HeaderSearch.cpp

Removed: 
    


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diff  --git a/clang/lib/Lex/HeaderSearch.cpp b/clang/lib/Lex/HeaderSearch.cpp
index f28a74f5d0ae5..ae09f70ee7896 100644
--- a/clang/lib/Lex/HeaderSearch.cpp
+++ b/clang/lib/Lex/HeaderSearch.cpp
@@ -672,9 +672,8 @@ OptionalFileEntryRef DirectoryLookup::DoFrameworkLookup(
     if (getDirCharacteristic() == SrcMgr::C_User) {
       SmallString<1024> SystemFrameworkMarker(FrameworkName);
       SystemFrameworkMarker += ".system_framework";
-      if (llvm::sys::fs::exists(SystemFrameworkMarker)) {
+      if (FileMgr.getOptionalFileRef(SystemFrameworkMarker))
         CacheEntry.IsUserSpecifiedSystemFramework = true;
-      }
     }
   }