ChuanqiXu added inline comments.
================ Comment at: clang/lib/Serialization/ASTWriter.cpp:4353 + // https://github.com/llvm/llvm-project/issues/56490 for example. + if (!A || (isa<PreferredNameAttr>(A) && Writer->isWritingNamedModules())) return Record.push_back(0); ---------------- The `Writer->isWritingNamedModules()` part is necessary. Otherwise we would break the https://github.com/llvm/llvm-project/blob/main/clang/test/PCH/decl-attrs.cpp test. The reason why the bug is not found by the user of PCH or clang modules is that a header generally would be guarded by `#ifndef ... #define` fashion. And if we remove the guard, the compiler would emit an error for duplicated definition. So the problem only lives in C++20 Named Modules. Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D130331/new/ https://reviews.llvm.org/D130331 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
