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[clang] Use the VFS to get the unique file ID #160936

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Merged
merged 1 commit into from
Sep 26, 2025
Merged

[clang] Use the VFS to get the unique file ID #160936

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13 changes: 9 additions & 4 deletions clang/lib/CodeGen/CodeGenModule.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -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);
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