[clang] [clang] Avoid deserialization during `MergeDefinitionData` (PR #172559)

[Chuanqi Xu via cfe-commits]

================
@@ -2107,8 +2107,9 @@ void ASTDeclMerger::MergeDefinitionData(
     auto *Def = DD.Definition;
     DD = std::move(MergeDD);
     DD.Definition = Def;
-    for (auto *D : Def->redecls())
-      cast<CXXRecordDecl>(D)->DefinitionData = &DD;
+    for (auto *R = Reader.getMostRecentExistingDecl(Def); R;
+         R = R->getPreviousDecl())
----------------
ChuanqiXu9 wrote:

But `Redeclarable::getPreviousDecl` may trigger deserialization

https://github.com/llvm/llvm-project/pull/172559
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits