Index: source/Plugins/SymbolFile/DWARF/DWARFDebugLine.cpp
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFDebugLine.cpp
+++ source/Plugins/SymbolFile/DWARF/DWARFDebugLine.cpp
@@ -446,26 +446,39 @@
     const lldb::ModuleSP &module_sp, const DWARFDataExtractor &debug_line_data,
     const lldb_private::FileSpec &cu_comp_dir, dw_offset_t stmt_list,
     FileSpecList &support_files) {
+  lldb::offset_t data_end = debug_line_data.GetByteSize();
   lldb::offset_t offset = stmt_list;
 
-  Prologue prologue;
-  if (!ParsePrologue(debug_line_data, &offset, &prologue)) {
-    Host::SystemLog(Host::eSystemLogError, "error: parsing line table prologue "
-                                           "at 0x%8.8x (parsing ended around "
-                                           "0x%8.8" PRIx64 "\n",
-                    stmt_list, offset);
-    return false;
-  }
+  // This loop runs once for regular compile units and may run multiple times
+  // for LTO optimized ones.
+  do {
+    Prologue prologue;
+    lldb::offset_t prologue_start = offset;
+
+    if (!ParsePrologue(debug_line_data, &offset, &prologue)) {
+      Host::SystemLog(Host::eSystemLogError, "error: parsing line table prologue "
+                                             "at 0x%8.8x (parsing ended around "
+                                             "0x%8.8" PRIx64 "\n",
+                      stmt_list, offset);
+      return false;
+    }
 
-  FileSpec file_spec;
-  std::string remapped_file;
+    FileSpec file_spec;
+    std::string remapped_file;
+
+    for (uint32_t file_idx = 1;
+         prologue.GetFile(file_idx, cu_comp_dir, file_spec); ++file_idx) {
+      if (module_sp->RemapSourceFile(file_spec.GetPath(), remapped_file))
+        file_spec.SetFile(remapped_file, false, FileSpec::Style::native);
+      support_files.Append(file_spec);
+    }
+
+    // We don't parse the entire prologue, but skip the statement program.
+    // The prologue's total_length does not include the length field itself.
+    // It can be 4 or 8 bytes, see DWARFDataExtractor::GetDWARFInitialLength().
+    offset = prologue_start + prologue.total_length + 4;
+  } while (offset < data_end);
 
-  for (uint32_t file_idx = 1;
-       prologue.GetFile(file_idx, cu_comp_dir, file_spec); ++file_idx) {
-    if (module_sp->RemapSourceFile(file_spec.GetPath(), remapped_file))
-      file_spec.SetFile(remapped_file, false, FileSpec::Style::native);
-    support_files.Append(file_spec);
-  }
   return true;
 }