diff --git a/llvm/lib/CodeGen/MachineModuleInfo.cpp b/llvm/lib/CodeGen/MachineModuleInfo.cpp
index 15ea9b8..4cc2a15 100644
--- a/llvm/lib/CodeGen/MachineModuleInfo.cpp
+++ b/llvm/lib/CodeGen/MachineModuleInfo.cpp
@@ -1505,6 +1505,9 @@
     RootScope = NULL;
   }
   
+  // Clean up line info.
+  Lines.clear();
+
   // Clean up frame info.
   FrameMoves.clear();
 }