diff --git a/llvm/lib/Transforms/Coroutines/CoroInternal.h b/llvm/lib/Transforms/Coroutines/CoroInternal.h
index e2f129c38d929..d08ed0aaa4b08 100644
--- a/llvm/lib/Transforms/Coroutines/CoroInternal.h
+++ b/llvm/lib/Transforms/Coroutines/CoroInternal.h
@@ -47,8 +47,6 @@ namespace coro {
 
 bool declaresIntrinsics(const Module &M,
                         const std::initializer_list<StringRef>);
-void replaceAllCoroAllocs(CoroBeginInst *CB, bool Replacement);
-void replaceAllCoroFrees(CoroBeginInst *CB, Value *Replacement);
 void replaceCoroFree(CoroIdInst *CoroId, bool Elide);
 void updateCallGraph(Function &Caller, ArrayRef<Function *> Funcs,
                      CallGraph &CG, CallGraphSCC &SCC);
diff --git a/llvm/lib/Transforms/Coroutines/CoroSplit.cpp b/llvm/lib/Transforms/Coroutines/CoroSplit.cpp
index 34ee70a6d3802..7c4a204e953dc 100644
--- a/llvm/lib/Transforms/Coroutines/CoroSplit.cpp
+++ b/llvm/lib/Transforms/Coroutines/CoroSplit.cpp
@@ -104,7 +104,6 @@ class CoroCloner {
   ValueToValueMapTy VMap;
   IRBuilder<> Builder;
   Value *NewFramePtr = nullptr;
-  Value *SwiftErrorSlot = nullptr;
 
   /// The active suspend instruction; meaningful only for continuation and async
   /// ABIs.
@@ -152,7 +151,6 @@ class CoroCloner {
     llvm_unreachable("Unknown CoroCloner::Kind enum");
   }
 
-  void createDeclaration();
   void replaceEntryBlock();
   Value *deriveNewFramePointer();
   void replaceRetconOrAsyncSuspendUses();
@@ -160,7 +158,6 @@ class CoroCloner {
   void replaceCoroEnds();
   void replaceSwiftErrorOps();
   void handleFinalSuspend();
-  void maybeFreeContinuationStorage();
 };
 
 } // end anonymous namespace
diff --git a/llvm/lib/Transforms/Scalar/NewGVN.cpp b/llvm/lib/Transforms/Scalar/NewGVN.cpp
index f422d1b51b991..85b59838b4862 100644
--- a/llvm/lib/Transforms/Scalar/NewGVN.cpp
+++ b/llvm/lib/Transforms/Scalar/NewGVN.cpp
@@ -835,7 +835,6 @@ class NewGVN {
   BasicBlock *getBlockForValue(Value *V) const;
   void deleteExpression(const Expression *E) const;
   MemoryUseOrDef *getMemoryAccess(const Instruction *) const;
-  MemoryAccess *getDefiningAccess(const MemoryAccess *) const;
   MemoryPhi *getMemoryAccess(const BasicBlock *) const;
   template <class T, class Range> T *getMinDFSOfRange(const Range &) const;
 
diff --git a/llvm/lib/Transforms/Utils/ValueMapper.cpp b/llvm/lib/Transforms/Utils/ValueMapper.cpp
index fac7b555e9757..8ab272e756c18 100644
--- a/llvm/lib/Transforms/Utils/ValueMapper.cpp
+++ b/llvm/lib/Transforms/Utils/ValueMapper.cpp
@@ -167,11 +167,9 @@ class Mapper {
   void flush();
 
 private:
-  void mapGlobalInitializer(GlobalVariable &GV, Constant &Init);
   void mapAppendingVariable(GlobalVariable &GV, Constant *InitPrefix,
                             bool IsOldCtorDtor,
                             ArrayRef<Constant *> NewMembers);
-  void mapGlobalIndirectSymbol(GlobalIndirectSymbol &GIS, Constant &Target);
 
   ValueToValueMapTy &getVM() { return *MCs[CurrentMCID].VM; }
   ValueMaterializer *getMaterializer() { return MCs[CurrentMCID].Materializer; }