diff --git a/llvm/include/llvm/CodeGen/AsmPrinter.h b/llvm/include/llvm/CodeGen/AsmPrinter.h
--- a/llvm/include/llvm/CodeGen/AsmPrinter.h
+++ b/llvm/include/llvm/CodeGen/AsmPrinter.h
@@ -59,7 +59,6 @@
 class MachineOptimizationRemarkEmitter;
 class MCAsmInfo;
 class MCCFIInstruction;
-struct MCCodePaddingContext;
 class MCContext;
 class MCExpr;
 class MCInst;
@@ -696,8 +695,6 @@
   GCMetadataPrinter *GetOrCreateGCPrinter(GCStrategy &S);
   /// Emit GlobalAlias or GlobalIFunc.
   void emitGlobalIndirectSymbol(Module &M, const GlobalIndirectSymbol &GIS);
-  void setupCodePaddingContext(const MachineBasicBlock &MBB,
-                               MCCodePaddingContext &Context) const;
 };
 
 } // end namespace llvm
diff --git a/llvm/include/llvm/MC/MCAsmBackend.h b/llvm/include/llvm/MC/MCAsmBackend.h
--- a/llvm/include/llvm/MC/MCAsmBackend.h
+++ b/llvm/include/llvm/MC/MCAsmBackend.h
@@ -17,21 +17,18 @@
 #include "llvm/MC/MCFragment.h"
 #include "llvm/Support/Endian.h"
 #include <cstdint>
-#include <memory>
 
 namespace llvm {
 
 class MCAsmLayout;
 class MCAssembler;
 class MCCFIInstruction;
-class MCCodePadder;
 struct MCFixupKindInfo;
 class MCFragment;
 class MCInst;
 class MCObjectStreamer;
 class MCObjectTargetWriter;
 class MCObjectWriter;
-struct MCCodePaddingContext;
 class MCRelaxableFragment;
 class MCSubtargetInfo;
 class MCValue;
@@ -39,8 +36,6 @@
 
 /// Generic interface to target specific assembler backends.
 class MCAsmBackend {
-  std::unique_ptr<MCCodePadder> CodePadder;
-
 protected: // Can only create subclasses.
   MCAsmBackend(support::endianness Endian);
 
@@ -184,40 +179,6 @@
   virtual bool isMicroMips(const MCSymbol *Sym) const {
     return false;
   }
-
-  /// Handles all target related code padding when starting to write a new
-  /// basic block to an object file.
-  ///
-  /// \param OS The streamer used for writing the padding data and function.
-  /// \param Context the context of the padding, Embeds the basic block's
-  /// parameters.
-  void handleCodePaddingBasicBlockStart(MCObjectStreamer *OS,
-                                        const MCCodePaddingContext &Context);
-  /// Handles all target related code padding after writing a block to an object
-  /// file.
-  ///
-  /// \param Context the context of the padding, Embeds the basic block's
-  /// parameters.
-  void handleCodePaddingBasicBlockEnd(const MCCodePaddingContext &Context);
-  /// Handles all target related code padding before writing a new instruction
-  /// to an object file.
-  ///
-  /// \param Inst the instruction.
-  void handleCodePaddingInstructionBegin(const MCInst &Inst);
-  /// Handles all target related code padding after writing an instruction to an
-  /// object file.
-  ///
-  /// \param Inst the instruction.
-  void handleCodePaddingInstructionEnd(const MCInst &Inst);
-
-  /// Relaxes a fragment (changes the size of the padding) according to target
-  /// requirements. The new size computation is done w.r.t a layout.
-  ///
-  /// \param PF The fragment to relax.
-  /// \param Layout Code layout information.
-  ///
-  /// \returns true iff any relaxation occurred.
-  bool relaxFragment(MCPaddingFragment *PF, MCAsmLayout &Layout);
 };
 
 } // end namespace llvm
diff --git a/llvm/include/llvm/MC/MCAssembler.h b/llvm/include/llvm/MC/MCAssembler.h
--- a/llvm/include/llvm/MC/MCAssembler.h
+++ b/llvm/include/llvm/MC/MCAssembler.h
@@ -192,8 +192,6 @@
 
   bool relaxInstruction(MCAsmLayout &Layout, MCRelaxableFragment &IF);
 
-  bool relaxPaddingFragment(MCAsmLayout &Layout, MCPaddingFragment &PF);
-
   bool relaxLEB(MCAsmLayout &Layout, MCLEBFragment &IF);
 
   bool relaxDwarfLineAddr(MCAsmLayout &Layout, MCDwarfLineAddrFragment &DF);
diff --git a/llvm/include/llvm/MC/MCCodePadder.h b/llvm/include/llvm/MC/MCCodePadder.h
deleted file mode 100644
--- a/llvm/include/llvm/MC/MCCodePadder.h
+++ /dev/null
@@ -1,241 +0,0 @@
-//===- llvm/MC/MCCodePadder.h - MC Code Padder ------------------*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_MC_MCCODEPADDER_H
-#define LLVM_MC_MCCODEPADDER_H
-
-#include "MCFragment.h"
-#include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/ADT/SmallVector.h"
-
-namespace llvm {
-
-class MCAsmLayout;
-class MCCodePaddingPolicy;
-class MCFragment;
-class MCInst;
-class MCObjectStreamer;
-class MCSection;
-
-typedef SmallVector<const MCPaddingFragment *, 8> MCPFRange;
-
-struct MCCodePaddingContext {
-  bool IsPaddingActive;
-  bool IsBasicBlockReachableViaFallthrough;
-  bool IsBasicBlockReachableViaBranch;
-};
-
-/// Target-independent base class incharge of all code padding decisions for a
-/// target. During encoding it determines if and where MCPaddingFragments will
-/// be located, as later on, when layout information is available, it determines
-/// their sizes.
-class MCCodePadder {
-  MCCodePadder(const MCCodePadder &) = delete;
-  void operator=(const MCCodePadder &) = delete;
-
-  /// Determines if the MCCodePaddingPolicies are active.
-  bool ArePoliciesActive;
-
-  /// All the supported MCCodePaddingPolicies.
-  SmallPtrSet<MCCodePaddingPolicy *, 4> CodePaddingPolicies;
-
-  /// A pointer to the fragment of the instruction whose padding is currently
-  /// done for.
-  MCPaddingFragment *CurrHandledInstFragment;
-
-  /// A map holding the jurisdiction for each padding fragment. Key: padding
-  /// fragment. Value: The fragment's jurisdiction. A jurisdiction is a vector
-  /// of padding fragments whose conditions are being controlled by another
-  /// fragment, the key fragment.
-  DenseMap<MCPaddingFragment *, MCPFRange> FragmentToJurisdiction;
-  MCPFRange &getJurisdiction(MCPaddingFragment *Fragment, MCAsmLayout &Layout);
-
-  /// A map holding the maximal instruction window size relevant for a padding
-  /// fragment.
-  DenseMap<MCPaddingFragment *, uint64_t> FragmentToMaxWindowSize;
-  uint64_t getMaxWindowSize(MCPaddingFragment *Fragment, MCAsmLayout &Layout);
-
-protected:
-  /// The current streamer, used to stream code padding.
-  MCObjectStreamer *OS;
-
-  bool addPolicy(MCCodePaddingPolicy *Policy);
-
-  virtual bool
-  basicBlockRequiresInsertionPoint(const MCCodePaddingContext &Context) {
-    return false;
-  }
-
-  virtual bool instructionRequiresInsertionPoint(const MCInst &Inst) {
-    return false;
-  }
-
-  virtual bool usePoliciesForBasicBlock(const MCCodePaddingContext &Context) {
-    return Context.IsPaddingActive;
-  }
-
-public:
-  MCCodePadder()
-      : ArePoliciesActive(false), CurrHandledInstFragment(nullptr),
-        OS(nullptr) {}
-  virtual ~MCCodePadder();
-
-  /// Handles all target related code padding when starting to write a new
-  /// basic block to an object file.
-  ///
-  /// \param OS The streamer used for writing the padding data and function.
-  /// \param Context the context of the padding, Embeds the basic block's
-  /// parameters.
-  void handleBasicBlockStart(MCObjectStreamer *OS,
-                             const MCCodePaddingContext &Context);
-  /// Handles all target related code padding when done writing a block to an
-  /// object file.
-  ///
-  /// \param Context the context of the padding, Embeds the basic block's
-  /// parameters.
-  void handleBasicBlockEnd(const MCCodePaddingContext &Context);
-  /// Handles all target related code padding before writing a new instruction
-  /// to an object file.
-  ///
-  /// \param Inst the instruction.
-  void handleInstructionBegin(const MCInst &Inst);
-  /// Handles all target related code padding after writing an instruction to an
-  /// object file.
-  ///
-  /// \param Inst the instruction.
-  void handleInstructionEnd(const MCInst &Inst);
-
-  /// Relaxes a fragment (changes the size of the padding) according to target
-  /// requirements. The new size computation is done w.r.t a layout.
-  ///
-  /// \param Fragment The fragment to relax.
-  /// \param Layout Code layout information.
-  ///
-  /// \returns true iff any relaxation occurred.
-  bool relaxFragment(MCPaddingFragment *Fragment, MCAsmLayout &Layout);
-};
-
-/// The base class for all padding policies, i.e. a rule or set of rules to pad
-/// the generated code.
-class MCCodePaddingPolicy {
-  MCCodePaddingPolicy() = delete;
-  MCCodePaddingPolicy(const MCCodePaddingPolicy &) = delete;
-  void operator=(const MCCodePaddingPolicy &) = delete;
-
-protected:
-  /// A mask holding the kind of this policy, i.e. only the i'th bit will be set
-  /// where i is the kind number.
-  const uint64_t KindMask;
-  /// Instruction window size relevant to this policy.
-  const uint64_t WindowSize;
-  /// A boolean indicating which byte of the instruction determies its
-  /// instruction window. If true - the last byte of the instructions, o.w. -
-  /// the first byte of the instruction.
-  const bool InstByteIsLastByte;
-
-  MCCodePaddingPolicy(uint64_t Kind, uint64_t WindowSize,
-                      bool InstByteIsLastByte)
-      : KindMask(UINT64_C(1) << Kind), WindowSize(WindowSize),
-        InstByteIsLastByte(InstByteIsLastByte) {}
-
-  /// Computes and returns the offset of the consecutive fragment of a given
-  /// fragment.
-  ///
-  /// \param Fragment The fragment whose consecutive offset will be computed.
-  /// \param Layout Code layout information.
-  ///
-  /// \returns the offset of the consecutive fragment of \p Fragment.
-  static uint64_t getNextFragmentOffset(const MCFragment *Fragment,
-                                        const MCAsmLayout &Layout);
-  /// Returns the instruction byte of an instruction pointed by a given
-  /// MCPaddingFragment. An instruction byte is the address of the byte of an
-  /// instruction which determines its instruction window.
-  ///
-  /// \param Fragment The fragment pointing to the instruction.
-  /// \param Layout Code layout information.
-  ///
-  /// \returns the instruction byte of an instruction pointed by \p Fragment.
-  uint64_t getFragmentInstByte(const MCPaddingFragment *Fragment,
-                               MCAsmLayout &Layout) const;
-  uint64_t computeWindowEndAddress(const MCPaddingFragment *Fragment,
-                                   uint64_t Offset, MCAsmLayout &Layout) const;
-
-  /// Computes and returns the penalty weight of a first instruction window in a
-  /// range. This requires a special function since the first window does not
-  /// contain all the padding fragments in that window. It only contains all the
-  /// padding fragments starting from the relevant insertion point.
-  ///
-  /// \param Window The first window.
-  /// \param Offset The offset of the parent section relative to the beginning
-  /// of the file, mod the window size.
-  /// \param Layout Code layout information.
-  ///
-  /// \returns the penalty weight of a first instruction window in a range, \p
-  /// Window.
-  double computeFirstWindowPenaltyWeight(const MCPFRange &Window,
-                                         uint64_t Offset,
-                                         MCAsmLayout &Layout) const;
-  /// Computes and returns the penalty caused by an instruction window.
-  ///
-  /// \param Window The instruction window.
-  /// \param Offset The offset of the parent section relative to the beginning
-  /// of the file, mod the window size.
-  /// \param Layout Code layout information.
-  ///
-  /// \returns the penalty caused by \p Window.
-  virtual double computeWindowPenaltyWeight(const MCPFRange &Window,
-                                            uint64_t Offset,
-                                            MCAsmLayout &Layout) const = 0;
-
-public:
-  virtual ~MCCodePaddingPolicy() {}
-
-  /// Returns the kind mask of this policy -  A mask holding the kind of this
-  /// policy, i.e. only the i'th bit will be set where i is the kind number.
-  uint64_t getKindMask() const { return KindMask; }
-  /// Returns the instruction window size relevant to this policy.
-  uint64_t getWindowSize() const { return WindowSize; }
-  /// Returns true if the last byte of an instruction determines its instruction
-  /// window, or false if the first of an instruction determines it.
-  bool isInstByteLastByte() const { return InstByteIsLastByte; }
-
-  /// Returns true iff this policy needs padding for a given basic block.
-  ///
-  /// \param Context the context of the padding, Embeds the basic block's
-  /// parameters.
-  ///
-  /// \returns true iff this policy needs padding for the basic block.
-  virtual bool
-  basicBlockRequiresPaddingFragment(const MCCodePaddingContext &Context) const {
-    return false;
-  }
-  /// Returns true iff this policy needs padding for a given instruction.
-  ///
-  /// \param Inst The given instruction.
-  ///
-  /// \returns true iff this policy needs padding for \p Inst.
-  virtual bool instructionRequiresPaddingFragment(const MCInst &Inst) const {
-    return false;
-  }
-  /// Computes and returns the penalty caused by a range of instruction windows.
-  /// The weight is computed for each window separelty and then accumulated.
-  ///
-  /// \param Range The range.
-  /// \param Offset The offset of the parent section relative to the beginning
-  /// of the file, mod the window size.
-  /// \param Layout Code layout information.
-  ///
-  /// \returns the penalty caused by \p Range.
-  double computeRangePenaltyWeight(const MCPFRange &Range, uint64_t Offset,
-                                   MCAsmLayout &Layout) const;
-};
-
-} // namespace llvm
-
-#endif // LLVM_MC_MCCODEPADDER_H
diff --git a/llvm/include/llvm/MC/MCFragment.h b/llvm/include/llvm/MC/MCFragment.h
--- a/llvm/include/llvm/MC/MCFragment.h
+++ b/llvm/include/llvm/MC/MCFragment.h
@@ -41,7 +41,6 @@
     FT_Dwarf,
     FT_DwarfFrame,
     FT_LEB,
-    FT_Padding,
     FT_SymbolId,
     FT_CVInlineLines,
     FT_CVDefRange,
@@ -332,98 +331,6 @@
   }
 };
 
-/// Fragment for adding required padding.
-/// This fragment is always inserted before an instruction, and holds that
-/// instruction as context information (as well as a mask of kinds) for
-/// determining the padding size.
-///
-class MCPaddingFragment : public MCFragment {
-  /// A mask containing all the kinds relevant to this fragment. i.e. the i'th
-  /// bit will be set iff kind i is relevant to this fragment.
-  uint64_t PaddingPoliciesMask;
-  /// A boolean indicating if this fragment will actually hold padding. If its
-  /// value is false, then this fragment serves only as a placeholder,
-  /// containing data to assist other insertion point in their decision making.
-  bool IsInsertionPoint;
-
-  uint64_t Size;
-
-  struct MCInstInfo {
-    bool IsInitialized;
-    MCInst Inst;
-    /// A boolean indicating whether the instruction pointed by this fragment is
-    /// a fixed size instruction or a relaxable instruction held by a
-    /// MCRelaxableFragment.
-    bool IsImmutableSizedInst;
-    union {
-      /// If the instruction is a fixed size instruction, hold its size.
-      size_t InstSize;
-      /// Otherwise, hold a pointer to the MCRelaxableFragment holding it.
-      MCRelaxableFragment *InstFragment;
-    };
-  };
-  MCInstInfo InstInfo;
-
-public:
-  static const uint64_t PFK_None = UINT64_C(0);
-
-  enum MCPaddingFragmentKind {
-    // values 0-7 are reserved for future target independet values.
-
-    FirstTargetPerfNopFragmentKind = 8,
-
-    /// Limit range of target MCPerfNopFragment kinds to fit in uint64_t
-    MaxTargetPerfNopFragmentKind = 63
-  };
-
-  MCPaddingFragment(MCSection *Sec = nullptr)
-      : MCFragment(FT_Padding, false, Sec), PaddingPoliciesMask(PFK_None),
-        IsInsertionPoint(false), Size(UINT64_C(0)),
-        InstInfo({false, MCInst(), false, {0}}) {}
-
-  bool isInsertionPoint() const { return IsInsertionPoint; }
-  void setAsInsertionPoint() { IsInsertionPoint = true; }
-  uint64_t getPaddingPoliciesMask() const { return PaddingPoliciesMask; }
-  void setPaddingPoliciesMask(uint64_t Value) { PaddingPoliciesMask = Value; }
-  bool hasPaddingPolicy(uint64_t PolicyMask) const {
-    assert(isPowerOf2_64(PolicyMask) &&
-           "Policy mask must contain exactly one policy");
-    return (getPaddingPoliciesMask() & PolicyMask) != PFK_None;
-  }
-  const MCInst &getInst() const {
-    assert(isInstructionInitialized() && "Fragment has no instruction!");
-    return InstInfo.Inst;
-  }
-  size_t getInstSize() const {
-    assert(isInstructionInitialized() && "Fragment has no instruction!");
-    if (InstInfo.IsImmutableSizedInst)
-      return InstInfo.InstSize;
-    assert(InstInfo.InstFragment != nullptr &&
-           "Must have a valid InstFragment to retrieve InstSize from");
-    return InstInfo.InstFragment->getContents().size();
-  }
-  void setInstAndInstSize(const MCInst &Inst, size_t InstSize) {
-	InstInfo.IsInitialized = true;
-    InstInfo.IsImmutableSizedInst = true;
-    InstInfo.Inst = Inst;
-    InstInfo.InstSize = InstSize;
-  }
-  void setInstAndInstFragment(const MCInst &Inst,
-                              MCRelaxableFragment *InstFragment) {
-    InstInfo.IsInitialized = true;
-    InstInfo.IsImmutableSizedInst = false;
-    InstInfo.Inst = Inst;
-    InstInfo.InstFragment = InstFragment;
-  }
-  uint64_t getSize() const { return Size; }
-  void setSize(uint64_t Value) { Size = Value; }
-  bool isInstructionInitialized() const { return InstInfo.IsInitialized; }
-
-  static bool classof(const MCFragment *F) {
-    return F->getKind() == MCFragment::FT_Padding;
-  }
-};
-
 class MCFillFragment : public MCFragment {
   /// Value to use for filling bytes.
   uint64_t Value;
diff --git a/llvm/include/llvm/MC/MCObjectStreamer.h b/llvm/include/llvm/MC/MCObjectStreamer.h
--- a/llvm/include/llvm/MC/MCObjectStreamer.h
+++ b/llvm/include/llvm/MC/MCObjectStreamer.h
@@ -51,7 +51,6 @@
   void EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) override;
   void EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) override;
   MCSymbol *EmitCFILabel() override;
-  void EmitInstructionImpl(const MCInst &Inst, const MCSubtargetInfo &STI);
   void resolvePendingFixups();
 
 protected:
@@ -84,7 +83,6 @@
   /// Optionally a \p STI can be passed in so that a new fragment is created
   /// if the Subtarget differs from the current fragment.
   MCDataFragment *getOrCreateDataFragment(const MCSubtargetInfo* STI = nullptr);
-  MCPaddingFragment *getOrCreatePaddingFragment();
 
 protected:
   bool changeSectionImpl(MCSection *Section, const MCExpr *Subsection);
@@ -133,10 +131,6 @@
                          unsigned MaxBytesToEmit = 0) override;
   void emitValueToOffset(const MCExpr *Offset, unsigned char Value,
                          SMLoc Loc) override;
-  void
-  EmitCodePaddingBasicBlockStart(const MCCodePaddingContext &Context) override;
-  void
-  EmitCodePaddingBasicBlockEnd(const MCCodePaddingContext &Context) override;
   void EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
                              unsigned Column, unsigned Flags,
                              unsigned Isa, unsigned Discriminator,
diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -85,7 +85,6 @@
 #include "llvm/IR/Type.h"
 #include "llvm/IR/Value.h"
 #include "llvm/MC/MCAsmInfo.h"
-#include "llvm/MC/MCCodePadder.h"
 #include "llvm/MC/MCContext.h"
 #include "llvm/MC/MCDirectives.h"
 #include "llvm/MC/MCDwarf.h"
@@ -2920,21 +2919,6 @@
   PrintChildLoopComment(OS, Loop, AP.getFunctionNumber());
 }
 
-void AsmPrinter::setupCodePaddingContext(const MachineBasicBlock &MBB,
-                                         MCCodePaddingContext &Context) const {
-  assert(MF != nullptr && "Machine function must be valid");
-  bool OptForSize = MF->getFunction().hasOptSize() ||
-                    llvm::shouldOptimizeForSize(&MBB, PSI, MBFI);
-  Context.IsPaddingActive = !MF->hasInlineAsm() &&
-                            !OptForSize &&
-                            TM.getOptLevel() != CodeGenOpt::None;
-  Context.IsBasicBlockReachableViaFallthrough =
-      std::find(MBB.pred_begin(), MBB.pred_end(), MBB.getPrevNode()) !=
-      MBB.pred_end();
-  Context.IsBasicBlockReachableViaBranch =
-      MBB.pred_size() > 0 && !isBlockOnlyReachableByFallthrough(&MBB);
-}
-
 /// EmitBasicBlockStart - This method prints the label for the specified
 /// MachineBasicBlock, an alignment (if present) and a comment describing
 /// it if appropriate.
@@ -2951,9 +2935,6 @@
   const Align Alignment = MBB.getAlignment();
   if (Alignment != Align::None())
     EmitAlignment(Alignment);
-  MCCodePaddingContext Context;
-  setupCodePaddingContext(MBB, Context);
-  OutStreamer->EmitCodePaddingBasicBlockStart(Context);
 
   // If the block has its address taken, emit any labels that were used to
   // reference the block.  It is possible that there is more than one label
@@ -3001,11 +2982,7 @@
   }
 }
 
-void AsmPrinter::EmitBasicBlockEnd(const MachineBasicBlock &MBB) {
-  MCCodePaddingContext Context;
-  setupCodePaddingContext(MBB, Context);
-  OutStreamer->EmitCodePaddingBasicBlockEnd(Context);
-}
+void AsmPrinter::EmitBasicBlockEnd(const MachineBasicBlock &MBB) {}
 
 void AsmPrinter::EmitVisibility(MCSymbol *Sym, unsigned Visibility,
                                 bool IsDefinition) const {
diff --git a/llvm/lib/MC/CMakeLists.txt b/llvm/lib/MC/CMakeLists.txt
--- a/llvm/lib/MC/CMakeLists.txt
+++ b/llvm/lib/MC/CMakeLists.txt
@@ -12,7 +12,6 @@
   MCAsmStreamer.cpp
   MCAssembler.cpp
   MCCodeEmitter.cpp
-  MCCodePadder.cpp
   MCCodeView.cpp
   MCContext.cpp
   MCDwarf.cpp
diff --git a/llvm/lib/MC/MCAsmBackend.cpp b/llvm/lib/MC/MCAsmBackend.cpp
--- a/llvm/lib/MC/MCAsmBackend.cpp
+++ b/llvm/lib/MC/MCAsmBackend.cpp
@@ -9,7 +9,6 @@
 #include "llvm/MC/MCAsmBackend.h"
 #include "llvm/ADT/None.h"
 #include "llvm/ADT/STLExtras.h"
-#include "llvm/MC/MCCodePadder.h"
 #include "llvm/MC/MCELFObjectWriter.h"
 #include "llvm/MC/MCFixupKindInfo.h"
 #include "llvm/MC/MCMachObjectWriter.h"
@@ -23,8 +22,7 @@
 
 using namespace llvm;
 
-MCAsmBackend::MCAsmBackend(support::endianness Endian)
-    : CodePadder(new MCCodePadder()), Endian(Endian) {}
+MCAsmBackend::MCAsmBackend(support::endianness Endian) : Endian(Endian) {}
 
 MCAsmBackend::~MCAsmBackend() = default;
 
@@ -113,25 +111,3 @@
     return true;
   return fixupNeedsRelaxation(Fixup, Value, DF, Layout);
 }
-
-void MCAsmBackend::handleCodePaddingBasicBlockStart(
-    MCObjectStreamer *OS, const MCCodePaddingContext &Context) {
-  CodePadder->handleBasicBlockStart(OS, Context);
-}
-
-void MCAsmBackend::handleCodePaddingBasicBlockEnd(
-    const MCCodePaddingContext &Context) {
-  CodePadder->handleBasicBlockEnd(Context);
-}
-
-void MCAsmBackend::handleCodePaddingInstructionBegin(const MCInst &Inst) {
-  CodePadder->handleInstructionBegin(Inst);
-}
-
-void MCAsmBackend::handleCodePaddingInstructionEnd(const MCInst &Inst) {
-  CodePadder->handleInstructionEnd(Inst);
-}
-
-bool MCAsmBackend::relaxFragment(MCPaddingFragment *PF, MCAsmLayout &Layout) {
-  return CodePadder->relaxFragment(PF, Layout);
-}
diff --git a/llvm/lib/MC/MCAssembler.cpp b/llvm/lib/MC/MCAssembler.cpp
--- a/llvm/lib/MC/MCAssembler.cpp
+++ b/llvm/lib/MC/MCAssembler.cpp
@@ -68,10 +68,6 @@
 STATISTIC(ObjectBytes, "Number of emitted object file bytes");
 STATISTIC(RelaxationSteps, "Number of assembler layout and relaxation steps");
 STATISTIC(RelaxedInstructions, "Number of relaxed instructions");
-STATISTIC(PaddingFragmentsRelaxations,
-          "Number of Padding Fragments relaxations");
-STATISTIC(PaddingFragmentsBytes,
-          "Total size of all padding from adding Fragments");
 
 } // end namespace stats
 } // end anonymous namespace
@@ -313,9 +309,6 @@
   case MCFragment::FT_LEB:
     return cast<MCLEBFragment>(F).getContents().size();
 
-  case MCFragment::FT_Padding:
-    return cast<MCPaddingFragment>(F).getSize();
-
   case MCFragment::FT_SymbolId:
     return 4;
 
@@ -612,13 +605,6 @@
     break;
   }
 
-  case MCFragment::FT_Padding: {
-    if (!Asm.getBackend().writeNopData(OS, FragmentSize))
-      report_fatal_error("unable to write nop sequence of " +
-                         Twine(FragmentSize) + " bytes");
-    break;
-  }
-
   case MCFragment::FT_SymbolId: {
     const MCSymbolIdFragment &SF = cast<MCSymbolIdFragment>(F);
     support::endian::write<uint32_t>(OS, SF.getSymbol()->getIndex(), Endian);
@@ -935,20 +921,6 @@
   return true;
 }
 
-bool MCAssembler::relaxPaddingFragment(MCAsmLayout &Layout,
-                                       MCPaddingFragment &PF) {
-  assert(getBackendPtr() && "Expected assembler backend");
-  uint64_t OldSize = PF.getSize();
-  if (!getBackend().relaxFragment(&PF, Layout))
-    return false;
-  uint64_t NewSize = PF.getSize();
-
-  ++stats::PaddingFragmentsRelaxations;
-  stats::PaddingFragmentsBytes += NewSize;
-  stats::PaddingFragmentsBytes -= OldSize;
-  return true;
-}
-
 bool MCAssembler::relaxLEB(MCAsmLayout &Layout, MCLEBFragment &LF) {
   uint64_t OldSize = LF.getContents().size();
   int64_t Value;
@@ -1085,9 +1057,6 @@
     case MCFragment::FT_LEB:
       RelaxedFrag = relaxLEB(Layout, *cast<MCLEBFragment>(I));
       break;
-    case MCFragment::FT_Padding:
-      RelaxedFrag = relaxPaddingFragment(Layout, *cast<MCPaddingFragment>(I));
-      break;
     case MCFragment::FT_CVInlineLines:
       RelaxedFrag =
           relaxCVInlineLineTable(Layout, *cast<MCCVInlineLineTableFragment>(I));
diff --git a/llvm/lib/MC/MCCodePadder.cpp b/llvm/lib/MC/MCCodePadder.cpp
deleted file mode 100644
--- a/llvm/lib/MC/MCCodePadder.cpp
+++ /dev/null
@@ -1,370 +0,0 @@
-//===- MCCodePadder.cpp - Target MC Code Padder ---------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/MC/MCAsmLayout.h"
-#include "llvm/MC/MCCodePadder.h"
-#include "llvm/MC/MCObjectStreamer.h"
-#include <algorithm>
-#include <limits>
-#include <numeric>
-
-using namespace llvm;
-
-//---------------------------------------------------------------------------
-// MCCodePadder
-//
-
-MCCodePadder::~MCCodePadder() {
-  for (auto *Policy : CodePaddingPolicies)
-    delete Policy;
-}
-
-bool MCCodePadder::addPolicy(MCCodePaddingPolicy *Policy) {
-  assert(Policy && "Policy must be valid");
-  return CodePaddingPolicies.insert(Policy).second;
-}
-
-void MCCodePadder::handleBasicBlockStart(MCObjectStreamer *OS,
-                                         const MCCodePaddingContext &Context) {
-  assert(OS != nullptr && "OS must be valid");
-  assert(this->OS == nullptr && "Still handling another basic block");
-  this->OS = OS;
-
-  ArePoliciesActive = usePoliciesForBasicBlock(Context);
-
-  bool InsertionPoint = basicBlockRequiresInsertionPoint(Context);
-  assert((!InsertionPoint ||
-          OS->getCurrentFragment()->getKind() != MCFragment::FT_Align) &&
-         "Cannot insert padding nops right after an alignment fragment as it "
-         "will ruin the alignment");
-
-  uint64_t PoliciesMask = MCPaddingFragment::PFK_None;
-  if (ArePoliciesActive) {
-    PoliciesMask = std::accumulate(
-        CodePaddingPolicies.begin(), CodePaddingPolicies.end(),
-        MCPaddingFragment::PFK_None,
-        [&Context](uint64_t Mask,
-                   const MCCodePaddingPolicy *Policy) -> uint64_t {
-          return Policy->basicBlockRequiresPaddingFragment(Context)
-                     ? (Mask | Policy->getKindMask())
-                     : Mask;
-        });
-  }
-
-  if (InsertionPoint || PoliciesMask != MCPaddingFragment::PFK_None) {
-    MCPaddingFragment *PaddingFragment = OS->getOrCreatePaddingFragment();
-    if (InsertionPoint)
-      PaddingFragment->setAsInsertionPoint();
-    PaddingFragment->setPaddingPoliciesMask(
-        PaddingFragment->getPaddingPoliciesMask() | PoliciesMask);
-  }
-}
-
-void MCCodePadder::handleBasicBlockEnd(const MCCodePaddingContext &Context) {
-  assert(this->OS != nullptr && "Not handling a basic block");
-  OS = nullptr;
-}
-
-void MCCodePadder::handleInstructionBegin(const MCInst &Inst) {
-  if (!OS)
-    return; // instruction was emitted outside a function
-
-  assert(CurrHandledInstFragment == nullptr && "Can't start handling an "
-                                               "instruction while still "
-                                               "handling another instruction");
-
-  bool InsertionPoint = instructionRequiresInsertionPoint(Inst);
-  assert((!InsertionPoint ||
-          OS->getCurrentFragment()->getKind() != MCFragment::FT_Align) &&
-         "Cannot insert padding nops right after an alignment fragment as it "
-         "will ruin the alignment");
-
-  uint64_t PoliciesMask = MCPaddingFragment::PFK_None;
-  if (ArePoliciesActive) {
-    PoliciesMask = std::accumulate(
-        CodePaddingPolicies.begin(), CodePaddingPolicies.end(),
-        MCPaddingFragment::PFK_None,
-        [&Inst](uint64_t Mask, const MCCodePaddingPolicy *Policy) -> uint64_t {
-          return Policy->instructionRequiresPaddingFragment(Inst)
-                     ? (Mask | Policy->getKindMask())
-                     : Mask;
-        });
-  }
-  MCFragment *CurrFragment = OS->getCurrentFragment();
-  // CurrFragment can be a previously created MCPaddingFragment. If so, let's
-  // update it with the information we have, such as the instruction that it
-  // should point to.
-  bool needToUpdateCurrFragment =
-      CurrFragment != nullptr &&
-      CurrFragment->getKind() == MCFragment::FT_Padding;
-  if (InsertionPoint || PoliciesMask != MCPaddingFragment::PFK_None ||
-      needToUpdateCurrFragment) {
-    // temporarily holding the fragment as CurrHandledInstFragment, to be
-    // updated after the instruction will be written
-    CurrHandledInstFragment = OS->getOrCreatePaddingFragment();
-    if (InsertionPoint)
-      CurrHandledInstFragment->setAsInsertionPoint();
-    CurrHandledInstFragment->setPaddingPoliciesMask(
-        CurrHandledInstFragment->getPaddingPoliciesMask() | PoliciesMask);
-  }
-}
-
-void MCCodePadder::handleInstructionEnd(const MCInst &Inst) {
-  if (!OS)
-    return; // instruction was emitted outside a function
-  if (CurrHandledInstFragment == nullptr)
-    return;
-
-  MCFragment *InstFragment = OS->getCurrentFragment();
-  if (MCDataFragment *InstDataFragment =
-          dyn_cast_or_null<MCDataFragment>(InstFragment))
-    // Inst is a fixed size instruction and was encoded into a MCDataFragment.
-    // Let the fragment hold it and its size. Its size is the current size of
-    // the data fragment, as the padding fragment was inserted right before it
-    // and nothing was written yet except Inst
-    CurrHandledInstFragment->setInstAndInstSize(
-        Inst, InstDataFragment->getContents().size());
-  else if (MCRelaxableFragment *InstRelaxableFragment =
-               dyn_cast_or_null<MCRelaxableFragment>(InstFragment))
-    // Inst may be relaxed and its size may vary.
-    // Let the fragment hold the instruction and the MCRelaxableFragment
-    // that's holding it.
-    CurrHandledInstFragment->setInstAndInstFragment(Inst,
-                                                    InstRelaxableFragment);
-  else
-    llvm_unreachable("After encoding an instruction current fragment must be "
-                     "either a MCDataFragment or a MCRelaxableFragment");
-
-  CurrHandledInstFragment = nullptr;
-}
-
-MCPFRange &MCCodePadder::getJurisdiction(MCPaddingFragment *Fragment,
-                                         MCAsmLayout &Layout) {
-  auto JurisdictionLocation = FragmentToJurisdiction.find(Fragment);
-  if (JurisdictionLocation != FragmentToJurisdiction.end())
-    return JurisdictionLocation->second;
-
-  MCPFRange Jurisdiction;
-
-  // Forward scanning the fragments in this section, starting from the given
-  // fragments, and adding relevant MCPaddingFragments to the Jurisdiction
-  for (MCFragment *CurrFragment = Fragment; CurrFragment != nullptr;
-       CurrFragment = CurrFragment->getNextNode()) {
-
-    MCPaddingFragment *CurrPaddingFragment =
-        dyn_cast<MCPaddingFragment>(CurrFragment);
-    if (CurrPaddingFragment == nullptr)
-      continue;
-
-    if (CurrPaddingFragment != Fragment &&
-        CurrPaddingFragment->isInsertionPoint())
-      // Found next insertion point Fragment. From now on it's its jurisdiction.
-      break;
-    for (const auto *Policy : CodePaddingPolicies) {
-      if (CurrPaddingFragment->hasPaddingPolicy(Policy->getKindMask())) {
-        Jurisdiction.push_back(CurrPaddingFragment);
-        break;
-      }
-    }
-  }
-
-  auto InsertionResult =
-      FragmentToJurisdiction.insert(std::make_pair(Fragment, Jurisdiction));
-  assert(InsertionResult.second &&
-         "Insertion to FragmentToJurisdiction failed");
-  return InsertionResult.first->second;
-}
-
-uint64_t MCCodePadder::getMaxWindowSize(MCPaddingFragment *Fragment,
-                                        MCAsmLayout &Layout) {
-  auto MaxFragmentSizeLocation = FragmentToMaxWindowSize.find(Fragment);
-  if (MaxFragmentSizeLocation != FragmentToMaxWindowSize.end())
-    return MaxFragmentSizeLocation->second;
-
-  MCPFRange &Jurisdiction = getJurisdiction(Fragment, Layout);
-  uint64_t JurisdictionMask = MCPaddingFragment::PFK_None;
-  for (const auto *Protege : Jurisdiction)
-    JurisdictionMask |= Protege->getPaddingPoliciesMask();
-
-  uint64_t MaxFragmentSize = UINT64_C(0);
-  for (const auto *Policy : CodePaddingPolicies)
-    if ((JurisdictionMask & Policy->getKindMask()) !=
-        MCPaddingFragment::PFK_None)
-      MaxFragmentSize = std::max(MaxFragmentSize, Policy->getWindowSize());
-
-  auto InsertionResult =
-      FragmentToMaxWindowSize.insert(std::make_pair(Fragment, MaxFragmentSize));
-  assert(InsertionResult.second &&
-         "Insertion to FragmentToMaxWindowSize failed");
-  return InsertionResult.first->second;
-}
-
-bool MCCodePadder::relaxFragment(MCPaddingFragment *Fragment,
-                                 MCAsmLayout &Layout) {
-  if (!Fragment->isInsertionPoint())
-    return false;
-  uint64_t OldSize = Fragment->getSize();
-
-  uint64_t MaxWindowSize = getMaxWindowSize(Fragment, Layout);
-  if (MaxWindowSize == UINT64_C(0))
-    return false;
-  assert(isPowerOf2_64(MaxWindowSize) &&
-         "MaxWindowSize must be an integer power of 2");
-  uint64_t SectionAlignment = Fragment->getParent()->getAlignment();
-  assert(isPowerOf2_64(SectionAlignment) &&
-         "SectionAlignment must be an integer power of 2");
-
-  MCPFRange &Jurisdiction = getJurisdiction(Fragment, Layout);
-  uint64_t OptimalSize = UINT64_C(0);
-  double OptimalWeight = std::numeric_limits<double>::max();
-  uint64_t MaxFragmentSize = MaxWindowSize - UINT16_C(1);
-  for (uint64_t Size = UINT64_C(0); Size <= MaxFragmentSize; ++Size) {
-    Fragment->setSize(Size);
-    Layout.invalidateFragmentsFrom(Fragment);
-    double SizeWeight = 0.0;
-    // The section is guaranteed to be aligned to SectionAlignment, but that
-    // doesn't guarantee the exact section offset w.r.t. the policies window
-    // size.
-    // As a concrete example, the section could be aligned to 16B, but a
-    // policy's window size can be 32B. That means that the section actual start
-    // address can either be 0mod32 or 16mod32. The said policy will act
-    // differently for each case, so we need to take both into consideration.
-    for (uint64_t Offset = UINT64_C(0); Offset < MaxWindowSize;
-         Offset += SectionAlignment) {
-      double OffsetWeight = std::accumulate(
-          CodePaddingPolicies.begin(), CodePaddingPolicies.end(), 0.0,
-          [&Jurisdiction, &Offset, &Layout](
-              double Weight, const MCCodePaddingPolicy *Policy) -> double {
-            double PolicyWeight =
-                Policy->computeRangePenaltyWeight(Jurisdiction, Offset, Layout);
-            assert(PolicyWeight >= 0.0 && "A penalty weight must be positive");
-            return Weight + PolicyWeight;
-          });
-      SizeWeight = std::max(SizeWeight, OffsetWeight);
-    }
-    if (SizeWeight < OptimalWeight) {
-      OptimalWeight = SizeWeight;
-      OptimalSize = Size;
-    }
-    if (OptimalWeight == 0.0)
-      break;
-  }
-
-  Fragment->setSize(OptimalSize);
-  Layout.invalidateFragmentsFrom(Fragment);
-  return OldSize != OptimalSize;
-}
-
-//---------------------------------------------------------------------------
-// MCCodePaddingPolicy
-//
-
-uint64_t MCCodePaddingPolicy::getNextFragmentOffset(const MCFragment *Fragment,
-                                                    const MCAsmLayout &Layout) {
-  assert(Fragment != nullptr && "Fragment cannot be null");
-  MCFragment const *NextFragment = Fragment->getNextNode();
-  return NextFragment == nullptr
-             ? Layout.getSectionAddressSize(Fragment->getParent())
-             : Layout.getFragmentOffset(NextFragment);
-}
-
-uint64_t
-MCCodePaddingPolicy::getFragmentInstByte(const MCPaddingFragment *Fragment,
-                                         MCAsmLayout &Layout) const {
-  uint64_t InstByte = getNextFragmentOffset(Fragment, Layout);
-  if (InstByteIsLastByte)
-    InstByte += Fragment->getInstSize() - UINT64_C(1);
-  return InstByte;
-}
-
-uint64_t
-MCCodePaddingPolicy::computeWindowEndAddress(const MCPaddingFragment *Fragment,
-                                             uint64_t Offset,
-                                             MCAsmLayout &Layout) const {
-  uint64_t InstByte = getFragmentInstByte(Fragment, Layout);
-  return alignTo(InstByte + UINT64_C(1) + Offset, WindowSize) - Offset;
-}
-
-double MCCodePaddingPolicy::computeRangePenaltyWeight(
-    const MCPFRange &Range, uint64_t Offset, MCAsmLayout &Layout) const {
-
-  SmallVector<MCPFRange, 8> Windows;
-  SmallVector<MCPFRange, 8>::iterator CurrWindowLocation = Windows.end();
-  for (const MCPaddingFragment *Fragment : Range) {
-    if (!Fragment->hasPaddingPolicy(getKindMask()))
-      continue;
-    uint64_t FragmentWindowEndAddress =
-        computeWindowEndAddress(Fragment, Offset, Layout);
-    if (CurrWindowLocation == Windows.end() ||
-        FragmentWindowEndAddress !=
-            computeWindowEndAddress(*CurrWindowLocation->begin(), Offset,
-                                    Layout)) {
-      // next window is starting
-      Windows.push_back(MCPFRange());
-      CurrWindowLocation = Windows.end() - 1;
-    }
-    CurrWindowLocation->push_back(Fragment);
-  }
-
-  if (Windows.empty())
-    return 0.0;
-
-  double RangeWeight = 0.0;
-  SmallVector<MCPFRange, 8>::iterator I = Windows.begin();
-  RangeWeight += computeFirstWindowPenaltyWeight(*I, Offset, Layout);
-  ++I;
-  RangeWeight += std::accumulate(
-      I, Windows.end(), 0.0,
-      [this, &Layout, &Offset](double Weight, MCPFRange &Window) -> double {
-        return Weight += computeWindowPenaltyWeight(Window, Offset, Layout);
-      });
-  return RangeWeight;
-}
-
-double MCCodePaddingPolicy::computeFirstWindowPenaltyWeight(
-    const MCPFRange &Window, uint64_t Offset, MCAsmLayout &Layout) const {
-  if (Window.empty())
-    return 0.0;
-  uint64_t WindowEndAddress =
-      computeWindowEndAddress(*Window.begin(), Offset, Layout);
-
-  MCPFRange FullWindowFirstPart; // will hold all the fragments that are in the
-								 // same window as the fragments in the given
-								 // window but their penalty weight should not
-								 // be added
-  for (const MCFragment *Fragment = (*Window.begin())->getPrevNode();
-       Fragment != nullptr; Fragment = Fragment->getPrevNode()) {
-    const MCPaddingFragment *PaddingNopFragment =
-        dyn_cast<MCPaddingFragment>(Fragment);
-    if (PaddingNopFragment == nullptr ||
-        !PaddingNopFragment->hasPaddingPolicy(getKindMask()))
-      continue;
-    if (WindowEndAddress !=
-        computeWindowEndAddress(PaddingNopFragment, Offset, Layout))
-      break;
-
-    FullWindowFirstPart.push_back(PaddingNopFragment);
-  }
-
-  std::reverse(FullWindowFirstPart.begin(), FullWindowFirstPart.end());
-  double FullWindowFirstPartWeight =
-      computeWindowPenaltyWeight(FullWindowFirstPart, Offset, Layout);
-
-  MCPFRange FullWindow(
-      FullWindowFirstPart); // will hold all the fragments that are in the
-                            // same window as the fragments in the given
-                            // window, whether their weight should be added
-                            // or not
-  FullWindow.append(Window.begin(), Window.end());
-  double FullWindowWeight =
-      computeWindowPenaltyWeight(FullWindow, Offset, Layout);
-
-  assert(FullWindowWeight >= FullWindowFirstPartWeight &&
-         "More fragments necessarily means bigger weight");
-  return FullWindowWeight - FullWindowFirstPartWeight;
-}
diff --git a/llvm/lib/MC/MCFragment.cpp b/llvm/lib/MC/MCFragment.cpp
--- a/llvm/lib/MC/MCFragment.cpp
+++ b/llvm/lib/MC/MCFragment.cpp
@@ -275,9 +275,6 @@
     case FT_LEB:
       delete cast<MCLEBFragment>(this);
       return;
-    case FT_Padding:
-      delete cast<MCPaddingFragment>(this);
-      return;
     case FT_SymbolId:
       delete cast<MCSymbolIdFragment>(this);
       return;
@@ -322,7 +319,6 @@
   case MCFragment::FT_Dwarf: OS << "MCDwarfFragment"; break;
   case MCFragment::FT_DwarfFrame: OS << "MCDwarfCallFrameFragment"; break;
   case MCFragment::FT_LEB:   OS << "MCLEBFragment"; break;
-  case MCFragment::FT_Padding: OS << "MCPaddingFragment"; break;
   case MCFragment::FT_SymbolId:    OS << "MCSymbolIdFragment"; break;
   case MCFragment::FT_CVInlineLines: OS << "MCCVInlineLineTableFragment"; break;
   case MCFragment::FT_CVDefRange: OS << "MCCVDefRangeTableFragment"; break;
@@ -422,19 +418,6 @@
     OS << " Value:" << LF->getValue() << " Signed:" << LF->isSigned();
     break;
   }
-  case MCFragment::FT_Padding: {
-    const MCPaddingFragment *F = cast<MCPaddingFragment>(this);
-    OS << "\n       ";
-    OS << " PaddingPoliciesMask:" << F->getPaddingPoliciesMask()
-       << " IsInsertionPoint:" << F->isInsertionPoint()
-       << " Size:" << F->getSize();
-    OS << "\n       ";
-    OS << " Inst:";
-    F->getInst().dump_pretty(OS);
-    OS << " InstSize:" << F->getInstSize();
-    OS << "\n       ";
-    break;
-  }
   case MCFragment::FT_SymbolId: {
     const MCSymbolIdFragment *F = cast<MCSymbolIdFragment>(this);
     OS << "\n       ";
diff --git a/llvm/lib/MC/MCObjectStreamer.cpp b/llvm/lib/MC/MCObjectStreamer.cpp
--- a/llvm/lib/MC/MCObjectStreamer.cpp
+++ b/llvm/lib/MC/MCObjectStreamer.cpp
@@ -167,16 +167,6 @@
   return F;
 }
 
-MCPaddingFragment *MCObjectStreamer::getOrCreatePaddingFragment() {
-  MCPaddingFragment *F =
-      dyn_cast_or_null<MCPaddingFragment>(getCurrentFragment());
-  if (!F) {
-    F = new MCPaddingFragment();
-    insert(F);
-  }
-  return F;
-}
-
 void MCObjectStreamer::visitUsedSymbol(const MCSymbol &Sym) {
   Assembler->registerSymbol(Sym);
 }
@@ -329,13 +319,6 @@
 
 void MCObjectStreamer::EmitInstruction(const MCInst &Inst,
                                        const MCSubtargetInfo &STI) {
-  getAssembler().getBackend().handleCodePaddingInstructionBegin(Inst);
-  EmitInstructionImpl(Inst, STI);
-  getAssembler().getBackend().handleCodePaddingInstructionEnd(Inst);
-}
-
-void MCObjectStreamer::EmitInstructionImpl(const MCInst &Inst,
-                                           const MCSubtargetInfo &STI) {
   MCStreamer::EmitInstruction(Inst, STI);
 
   MCSection *Sec = getCurrentSectionOnly();
@@ -568,16 +551,6 @@
   insert(new MCOrgFragment(*Offset, Value, Loc));
 }
 
-void MCObjectStreamer::EmitCodePaddingBasicBlockStart(
-    const MCCodePaddingContext &Context) {
-  getAssembler().getBackend().handleCodePaddingBasicBlockStart(this, Context);
-}
-
-void MCObjectStreamer::EmitCodePaddingBasicBlockEnd(
-    const MCCodePaddingContext &Context) {
-  getAssembler().getBackend().handleCodePaddingBasicBlockEnd(Context);
-}
-
 // Associate DTPRel32 fixup with data and resize data area
 void MCObjectStreamer::EmitDTPRel32Value(const MCExpr *Value) {
   MCDataFragment *DF = getOrCreateDataFragment();
diff --git a/llvm/utils/gn/secondary/llvm/lib/MC/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/MC/BUILD.gn
--- a/llvm/utils/gn/secondary/llvm/lib/MC/BUILD.gn
+++ b/llvm/utils/gn/secondary/llvm/lib/MC/BUILD.gn
@@ -23,7 +23,6 @@
     "MCAsmStreamer.cpp",
     "MCAssembler.cpp",
     "MCCodeEmitter.cpp",
-    "MCCodePadder.cpp",
     "MCCodeView.cpp",
     "MCContext.cpp",
     "MCDwarf.cpp",