1 files changed, 4 insertions, 0 deletions
diff --git a/lib/Transforms/HoistPHIConstants.cpp b/lib/Transforms/HoistPHIConstants.cpp
index f6e6109ea5..e969ac24b3 100644
--- a/lib/Transforms/HoistPHIConstants.cpp
+++ b/lib/Transforms/HoistPHIConstants.cpp
@@ -76,6 +76,10 @@ static bool doHoistPHIConstants(Function *M) {
 namespace {
   struct HoistPHIConstants : public FunctionPass {
     virtual bool runOnFunction(Function *F) { return doHoistPHIConstants(F); }
+
+    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+      AU.preservesCFG();
+    }
   };
 }