diff --git a/lib/CodeGen/MachineModuleInfo.cpp b/lib/CodeGen/MachineModuleInfo.cpp
index 20b819e..df9d7ca 100644
--- a/lib/CodeGen/MachineModuleInfo.cpp
+++ b/lib/CodeGen/MachineModuleInfo.cpp
@@ -306,6 +306,7 @@
   DebugLabelFolder() : MachineFunctionPass(&ID) {}
 
   virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+    AU.setPreservesCFG();
     AU.addPreservedID(MachineLoopInfoID);
     AU.addPreservedID(MachineDominatorsID);
     MachineFunctionPass::getAnalysisUsage(AU);