diff --git a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
--- a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
+++ b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
@@ -481,7 +481,7 @@
 
   void FindDwpSymbolFile();
 
-  const lldb_private::FileSpecList &GetTypeUnitSupportFiles(DWARFTypeUnit &tu);
+  const lldb_private::FileSpecList &GetSharedUnitSupportFiles(DWARFUnit &tu);
 
   lldb::ModuleWP m_debug_map_module_wp;
   SymbolFileDWARFDebugMap *m_debug_map_symfile;
@@ -516,7 +516,7 @@
   DIERefToClangType m_forward_decl_dieref_to_clang_type;
   ClangTypeToDIE m_forward_decl_clang_type_to_die;
   llvm::DenseMap<dw_offset_t, lldb_private::FileSpecList>
-      m_type_unit_support_files;
+      m_shared_unit_support_files;
   std::vector<uint32_t> m_lldb_cu_to_dwarf_unit;
 };
 
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
--- a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
@@ -986,15 +986,14 @@
     return FileSpec();
   }
 
-  auto &tu = llvm::cast<DWARFTypeUnit>(unit);
-  return GetTypeUnitSupportFiles(tu).GetFileSpecAtIndex(file_idx);
+  return GetSharedUnitSupportFiles(unit).GetFileSpecAtIndex(file_idx);
 }
 
 const FileSpecList &
-SymbolFileDWARF::GetTypeUnitSupportFiles(DWARFTypeUnit &tu) {
+SymbolFileDWARF::GetSharedUnitSupportFiles(DWARFUnit &unit) {
   static FileSpecList empty_list;
 
-  dw_offset_t offset = tu.GetLineTableOffset();
+  dw_offset_t offset = unit.GetLineTableOffset();
   if (offset == DW_INVALID_OFFSET ||
       offset == llvm::DenseMapInfo<dw_offset_t>::getEmptyKey() ||
       offset == llvm::DenseMapInfo<dw_offset_t>::getTombstoneKey())
@@ -1002,7 +1001,7 @@
 
   // Many type units can share a line table, so parse the support file list
   // once, and cache it based on the offset field.
-  auto iter_bool = m_type_unit_support_files.try_emplace(offset);
+  auto iter_bool = m_shared_unit_support_files.try_emplace(offset);
   FileSpecList &list = iter_bool.first->second;
   if (iter_bool.second) {
     uint64_t line_table_offset = offset;
@@ -1011,16 +1010,17 @@
     llvm::DWARFDebugLine::Prologue prologue;
     auto report = [](llvm::Error error) {
       Log *log = LogChannelDWARF::GetLogIfAll(DWARF_LOG_DEBUG_INFO);
-      LLDB_LOG_ERROR(log, std::move(error),
-                     "SymbolFileDWARF::GetTypeUnitSupportFiles failed to parse "
-                     "the line table prologue");
+      LLDB_LOG_ERROR(
+          log, std::move(error),
+          "SymbolFileDWARF::GetSharedUnitSupportFiles failed to parse "
+          "the line table prologue");
     };
     llvm::Error error = prologue.parse(data, &line_table_offset, report, ctx);
     if (error) {
       report(std::move(error));
     } else {
       list = ParseSupportFilesFromPrologue(GetObjectFile()->GetModule(),
-                                           prologue, tu.GetPathStyle());
+                                           prologue, unit.GetPathStyle());
     }
   }
   return list;