[clang] 7b3d285 - [clang] Use the VFS to get the unique file ID (#160936)

[via cfe-commits]

Author: Jan Svoboda
Date: 2025-09-26T14:54:03-07:00
New Revision: 7b3d28573c1c3ae74fc829d659a6a99c02d961f9

URL: https://github.com/llvm/llvm-project/commit/7b3d28573c1c3ae74fc829d659a6a99c02d961f9
DIFF: https://github.com/llvm/llvm-project/commit/7b3d28573c1c3ae74fc829d659a6a99c02d961f9.diff

LOG: [clang] Use the VFS to get the unique file ID (#160936)

This PR uses the VFS to get the unique file ID when printing
externalized decls in CUDA instead of going straight to the real file
system. This matches the behavior of other input files of the compiler.

Added: 
    

Modified: 
    clang/lib/CodeGen/CodeGenModule.cpp

Removed: 
    


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diff  --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 875f06b53f53d..f6f7f22a09004 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -8172,12 +8172,17 @@ void CodeGenModule::printPostfixForExternalizedDecl(llvm::raw_ostream &OS,
 
     // Get the UniqueID for the file containing the decl.
     llvm::sys::fs::UniqueID ID;
-    if (llvm::sys::fs::getUniqueID(PLoc.getFilename(), ID)) {
+    auto Status = FS->status(PLoc.getFilename());
+    if (!Status) {
       PLoc = SM.getPresumedLoc(D->getLocation(), /*UseLineDirectives=*/false);
       assert(PLoc.isValid() && "Source location is expected to be valid.");
-      if (auto EC = llvm::sys::fs::getUniqueID(PLoc.getFilename(), ID))
-        SM.getDiagnostics().Report(diag::err_cannot_open_file)
-            << PLoc.getFilename() << EC.message();
+      Status = FS->status(PLoc.getFilename());
+    }
+    if (!Status) {
+      SM.getDiagnostics().Report(diag::err_cannot_open_file)
+          << PLoc.getFilename() << Status.getError().message();
+    } else {
+      ID = Status->getUniqueID();
     }
     OS << llvm::format("%x", ID.getFile()) << llvm::format("%x", ID.getDevice())
        << "_" << llvm::utohexstr(Result.low(), /*LowerCase=*/true, /*Width=*/8);