diff --git a/llvm/include/llvm/InitializePasses.h b/llvm/include/llvm/InitializePasses.h
--- a/llvm/include/llvm/InitializePasses.h
+++ b/llvm/include/llvm/InitializePasses.h
@@ -62,7 +62,6 @@
 void initializeAtomicExpandPass(PassRegistry&);
 void initializeBasicBlockSectionsProfileReaderPass(PassRegistry &);
 void initializeBasicBlockSectionsPass(PassRegistry &);
-void initializeBDCELegacyPassPass(PassRegistry&);
 void initializeBarrierNoopPass(PassRegistry&);
 void initializeBasicAAWrapperPassPass(PassRegistry&);
 void initializeBlockFrequencyInfoWrapperPassPass(PassRegistry&);
diff --git a/llvm/include/llvm/LinkAllPasses.h b/llvm/include/llvm/LinkAllPasses.h
--- a/llvm/include/llvm/LinkAllPasses.h
+++ b/llvm/include/llvm/LinkAllPasses.h
@@ -69,7 +69,6 @@
         return;
 
       (void) llvm::createAAEvalPass();
-      (void)llvm::createBitTrackingDCEPass();
       (void) llvm::createAlignmentFromAssumptionsPass();
       (void) llvm::createBasicAAWrapperPass();
       (void) llvm::createSCEVAAWrapperPass();
diff --git a/llvm/include/llvm/Transforms/Scalar.h b/llvm/include/llvm/Transforms/Scalar.h
--- a/llvm/include/llvm/Transforms/Scalar.h
+++ b/llvm/include/llvm/Transforms/Scalar.h
@@ -73,13 +73,6 @@
 Pass *createLoopGuardWideningPass();
 
 
-//===----------------------------------------------------------------------===//
-//
-// BitTrackingDCE - This pass uses a bit-tracking DCE algorithm in order to
-// remove computations of dead bits.
-//
-FunctionPass *createBitTrackingDCEPass();
-
 //===----------------------------------------------------------------------===//
 //
 // SROA - Replace aggregates or pieces of aggregates with scalar SSA values.
diff --git a/llvm/lib/Transforms/Scalar/BDCE.cpp b/llvm/lib/Transforms/Scalar/BDCE.cpp
--- a/llvm/lib/Transforms/Scalar/BDCE.cpp
+++ b/llvm/lib/Transforms/Scalar/BDCE.cpp
@@ -23,11 +23,8 @@
 #include "llvm/IR/IRBuilder.h"
 #include "llvm/IR/InstIterator.h"
 #include "llvm/IR/Instructions.h"
-#include "llvm/InitializePasses.h"
-#include "llvm/Pass.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/raw_ostream.h"
-#include "llvm/Transforms/Scalar.h"
 #include "llvm/Transforms/Utils/Local.h"
 using namespace llvm;
 
@@ -173,34 +170,3 @@
   PA.preserveSet<CFGAnalyses>();
   return PA;
 }
-
-namespace {
-struct BDCELegacyPass : public FunctionPass {
-  static char ID; // Pass identification, replacement for typeid
-  BDCELegacyPass() : FunctionPass(ID) {
-    initializeBDCELegacyPassPass(*PassRegistry::getPassRegistry());
-  }
-
-  bool runOnFunction(Function &F) override {
-    if (skipFunction(F))
-      return false;
-    auto &DB = getAnalysis<DemandedBitsWrapperPass>().getDemandedBits();
-    return bitTrackingDCE(F, DB);
-  }
-
-  void getAnalysisUsage(AnalysisUsage &AU) const override {
-    AU.setPreservesCFG();
-    AU.addRequired<DemandedBitsWrapperPass>();
-    AU.addPreserved<GlobalsAAWrapperPass>();
-  }
-};
-}
-
-char BDCELegacyPass::ID = 0;
-INITIALIZE_PASS_BEGIN(BDCELegacyPass, "bdce",
-                      "Bit-Tracking Dead Code Elimination", false, false)
-INITIALIZE_PASS_DEPENDENCY(DemandedBitsWrapperPass)
-INITIALIZE_PASS_END(BDCELegacyPass, "bdce",
-                    "Bit-Tracking Dead Code Elimination", false, false)
-
-FunctionPass *llvm::createBitTrackingDCEPass() { return new BDCELegacyPass(); }
diff --git a/llvm/lib/Transforms/Scalar/Scalar.cpp b/llvm/lib/Transforms/Scalar/Scalar.cpp
--- a/llvm/lib/Transforms/Scalar/Scalar.cpp
+++ b/llvm/lib/Transforms/Scalar/Scalar.cpp
@@ -27,7 +27,6 @@
 /// initializeScalarOptsPasses - Initialize all passes linked into the
 /// ScalarOpts library.
 void llvm::initializeScalarOpts(PassRegistry &Registry) {
-  initializeBDCELegacyPassPass(Registry);
   initializeAlignmentFromAssumptionsPass(Registry);
   initializeCallSiteSplittingLegacyPassPass(Registry);
   initializeConstantHoistingLegacyPassPass(Registry);