From fec4700b3d468dfbd6b68ff34afd4bc3f8ef87be Mon Sep 17 00:00:00 2001
From: Roy Shi <royshi@meta.com>
Date: Wed, 5 Nov 2025 16:18:40 -0800
Subject: [PATCH] [dsymutil] Fix parallel linker so it won't generate
 self-recurrisve typedef DIE

---
 llvm/lib/DWARFLinker/Parallel/SyntheticTypeNameBuilder.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/llvm/lib/DWARFLinker/Parallel/SyntheticTypeNameBuilder.cpp b/llvm/lib/DWARFLinker/Parallel/SyntheticTypeNameBuilder.cpp
index 34174f98b7e37..144cdb18f76d6 100644
--- a/llvm/lib/DWARFLinker/Parallel/SyntheticTypeNameBuilder.cpp
+++ b/llvm/lib/DWARFLinker/Parallel/SyntheticTypeNameBuilder.cpp
@@ -372,6 +372,11 @@ Error SyntheticTypeNameBuilder::addTypeName(UnitEntryPairTy InputUnitEntryPair,
       addValueName(InputUnitEntryPair, dwarf::DW_AT_const_value);
     }
   } break;
+  case dwarf::DW_TAG_typedef: {
+    // Add decl file and line if haven't already.
+    if (!HasDeclFileName)
+      addDieNameFromDeclFileAndDeclLine(InputUnitEntryPair, HasDeclFileName);
+  } break;
   default: {
     // Nothing to do.
   } break;