1 files changed, 12 insertions, 0 deletions
diff --git a/include/llvm/DebugInfo/CodeView/DebugSubsectionRecord.h b/include/llvm/DebugInfo/CodeView/DebugSubsectionRecord.h
index 694731742064..ee17b47d8e63 100644
--- a/include/llvm/DebugInfo/CodeView/DebugSubsectionRecord.h
+++ b/include/llvm/DebugInfo/CodeView/DebugSubsectionRecord.h
@@ -51,11 +51,23 @@ class DebugSubsectionRecordBuilder {
 public:
   DebugSubsectionRecordBuilder(std::shared_ptr<DebugSubsection> Subsection,
                                CodeViewContainer Container);
+
+  /// Use this to copy existing subsections directly from source to destination.
+  /// For example, line table subsections in an object file only need to be
+  /// relocated before being copied into the PDB.
+  DebugSubsectionRecordBuilder(const DebugSubsectionRecord &Contents,
+                               CodeViewContainer Container);
+
   uint32_t calculateSerializedLength();
   Error commit(BinaryStreamWriter &Writer) const;
 
 private:
+  /// The subsection to build. Will be null if Contents is non-empty.
   std::shared_ptr<DebugSubsection> Subsection;
+
+  /// The bytes of the subsection. Only non-empty if Subsection is null.
+  DebugSubsectionRecord Contents;
+
   CodeViewContainer Container;
 };