diff --git a/llvm/lib/Transforms/ObjCARC/ObjCARCOpts.cpp b/llvm/lib/Transforms/ObjCARC/ObjCARCOpts.cpp
--- a/llvm/lib/Transforms/ObjCARC/ObjCARCOpts.cpp
+++ b/llvm/lib/Transforms/ObjCARC/ObjCARCOpts.cpp
@@ -574,7 +574,6 @@
   public:
     void init(Module &M);
     bool run(Function &F, AAResults &AA);
-    void releaseMemory();
     bool hasCFGChanged() const { return CFGChanged; }
 };
 } // end anonymous namespace
@@ -2483,10 +2482,6 @@
   return Changed;
 }
 
-void ObjCARCOpt::releaseMemory() {
-  PA.clear();
-}
-
 /// @}
 ///