diff --git a/include/llvm/CodeGen/MachineBlockFrequencyInfo.h b/include/llvm/CodeGen/MachineBlockFrequencyInfo.h
index 2a826d0..a438ecf 100644
--- a/include/llvm/CodeGen/MachineBlockFrequencyInfo.h
+++ b/include/llvm/CodeGen/MachineBlockFrequencyInfo.h
@@ -38,9 +38,6 @@
   static char ID;
 
   MachineBlockFrequencyInfo();
-  explicit MachineBlockFrequencyInfo(MachineFunction &F,
-                                     MachineBranchProbabilityInfo &MBPI,
-                                     MachineLoopInfo &MLI);
   ~MachineBlockFrequencyInfo() override;
 
   void getAnalysisUsage(AnalysisUsage &AU) const override;
diff --git a/include/llvm/CodeGen/MachineDominators.h b/include/llvm/CodeGen/MachineDominators.h
index 9d31232..e4d7a02 100644
--- a/include/llvm/CodeGen/MachineDominators.h
+++ b/include/llvm/CodeGen/MachineDominators.h
@@ -81,9 +81,6 @@
   static char ID; // Pass ID, replacement for typeid
 
   MachineDominatorTree();
-  explicit MachineDominatorTree(MachineFunction &MF) : MachineFunctionPass(ID) {
-    calculate(MF);
-  }
 
   DomTreeT &getBase() {
     if (!DT) DT.reset(new DomTreeT());
@@ -114,8 +111,6 @@
 
   bool runOnMachineFunction(MachineFunction &F) override;
 
-  void calculate(MachineFunction &F);
-
   bool dominates(const MachineDomTreeNode *A,
                  const MachineDomTreeNode *B) const {
     applySplitCriticalEdges();
diff --git a/include/llvm/CodeGen/MachineLoopInfo.h b/include/llvm/CodeGen/MachineLoopInfo.h
index 1612c8b..da6df59 100644
--- a/include/llvm/CodeGen/MachineLoopInfo.h
+++ b/include/llvm/CodeGen/MachineLoopInfo.h
@@ -37,7 +37,6 @@
 
 namespace llvm {
 
-class MachineDominatorTree;
 // Implementation in LoopInfoImpl.h
 class MachineLoop;
 extern template class LoopBase<MachineBasicBlock, MachineLoop>;
@@ -92,10 +91,6 @@
   MachineLoopInfo() : MachineFunctionPass(ID) {
     initializeMachineLoopInfoPass(*PassRegistry::getPassRegistry());
   }
-  explicit MachineLoopInfo(MachineDominatorTree &MDT)
-      : MachineFunctionPass(ID) {
-    calculate(MDT);
-  }
   MachineLoopInfo(const MachineLoopInfo &) = delete;
   MachineLoopInfo &operator=(const MachineLoopInfo &) = delete;
 
@@ -138,7 +133,6 @@
 
   /// Calculate the natural loop information.
   bool runOnMachineFunction(MachineFunction &F) override;
-  void calculate(MachineDominatorTree &MDT);
 
   void releaseMemory() override { LI.releaseMemory(); }
 
diff --git a/include/llvm/CodeGen/MachineSizeOpts.h b/include/llvm/CodeGen/MachineSizeOpts.h
deleted file mode 100644
index 75e871d..0000000
--- a/include/llvm/CodeGen/MachineSizeOpts.h
+++ /dev/null
@@ -1,37 +0,0 @@
-//===- MachineSizeOpts.h - machine size optimization ------------*- 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
-//
-//===----------------------------------------------------------------------===//
-//
-// This file contains some shared machine IR code size optimization related
-// code.
-//
-//===----------------------------------------------------------------------===//
-#ifndef LLVM_CODEGEN_MACHINE_SIZEOPTS_H
-#define LLVM_CODEGEN_MACHINE_SIZEOPTS_H
-
-#include "llvm/Transforms/Utils/SizeOpts.h"
-
-namespace llvm {
-
-class ProfileSummaryInfo;
-class MachineBasicBlock;
-class MachineBlockFrequencyInfo;
-class MachineFunction;
-
-/// Returns true if machine function \p MF is suggested to be size-optimized
-/// base on the profile.
-bool shouldOptimizeForSize(const MachineFunction *MF, ProfileSummaryInfo *PSI,
-                           const MachineBlockFrequencyInfo *BFI);
-/// Returns true if machine basic block \p MBB is suggested to be size-optimized
-/// base on the profile.
-bool shouldOptimizeForSize(const MachineBasicBlock *MBB,
-                           ProfileSummaryInfo *PSI,
-                           const MachineBlockFrequencyInfo *MBFI);
-
-} // end namespace llvm
-
-#endif // LLVM_CODEGEN_MACHINE_SIZEOPTS_H
diff --git a/include/llvm/Transforms/Utils/SizeOpts.h b/include/llvm/Transforms/Utils/SizeOpts.h
index 1c56da0..1a052c6 100644
--- a/include/llvm/Transforms/Utils/SizeOpts.h
+++ b/include/llvm/Transforms/Utils/SizeOpts.h
@@ -13,18 +13,6 @@
 #ifndef LLVM_TRANSFORMS_UTILS_SIZEOPTS_H
 #define LLVM_TRANSFORMS_UTILS_SIZEOPTS_H
 
-#include "llvm/Analysis/BlockFrequencyInfo.h"
-#include "llvm/Analysis/ProfileSummaryInfo.h"
-#include "llvm/Support/CommandLine.h"
-
-using namespace llvm;
-
-extern cl::opt<bool> EnablePGSO;
-extern cl::opt<bool> PGSOLargeWorkingSetSizeOnly;
-extern cl::opt<bool> ForcePGSO;
-extern cl::opt<int> PgsoCutoffInstrProf;
-extern cl::opt<int> PgsoCutoffSampleProf;
-
 namespace llvm {
 
 class BasicBlock;
@@ -32,52 +20,13 @@
 class Function;
 class ProfileSummaryInfo;
 
-template<typename AdapterT, typename FuncT, typename BFIT>
-bool shouldFuncOptimizeForSizeImpl(const FuncT *F, ProfileSummaryInfo *PSI,
-                                   BFIT *BFI) {
-  assert(F);
-  if (!PSI || !BFI || !PSI->hasProfileSummary())
-    return false;
-  if (ForcePGSO)
-    return true;
-  if (!EnablePGSO)
-    return false;
-  if (PGSOLargeWorkingSetSizeOnly && !PSI->hasLargeWorkingSetSize()) {
-    // Even if the working set size isn't large, size-optimize cold code.
-    return AdapterT::isFunctionColdInCallGraph(F, PSI, *BFI);
-  }
-  return !AdapterT::isFunctionHotInCallGraphNthPercentile(
-      PSI->hasSampleProfile() ? PgsoCutoffSampleProf : PgsoCutoffInstrProf,
-      F, PSI, *BFI);
-}
-
-template<typename AdapterT, typename BlockT, typename BFIT>
-bool shouldOptimizeForSizeImpl(const BlockT *BB, ProfileSummaryInfo *PSI,
-                               BFIT *BFI) {
-  assert(BB);
-  if (!PSI || !BFI || !PSI->hasProfileSummary())
-    return false;
-  if (ForcePGSO)
-    return true;
-  if (!EnablePGSO)
-    return false;
-  if (PGSOLargeWorkingSetSizeOnly && !PSI->hasLargeWorkingSetSize()) {
-    // Even if the working set size isn't large, size-optimize cold code.
-    return AdapterT::isColdBlock(BB, PSI, BFI);
-  }
-  return !AdapterT::isHotBlockNthPercentile(
-      PSI->hasSampleProfile() ? PgsoCutoffSampleProf : PgsoCutoffInstrProf,
-      BB, PSI, BFI);
-}
-
 /// Returns true if function \p F is suggested to be size-optimized base on the
 /// profile.
-bool shouldOptimizeForSize(const Function *F, ProfileSummaryInfo *PSI,
+bool shouldOptimizeForSize(Function *F, ProfileSummaryInfo *PSI,
                            BlockFrequencyInfo *BFI);
-
 /// Returns true if basic block \p BB is suggested to be size-optimized base
 /// on the profile.
-bool shouldOptimizeForSize(const BasicBlock *BB, ProfileSummaryInfo *PSI,
+bool shouldOptimizeForSize(BasicBlock *BB, ProfileSummaryInfo *PSI,
                            BlockFrequencyInfo *BFI);
 
 } // end namespace llvm
diff --git a/lib/CodeGen/CMakeLists.txt b/lib/CodeGen/CMakeLists.txt
index f5c18f8..50b469d 100644
--- a/lib/CodeGen/CMakeLists.txt
+++ b/lib/CodeGen/CMakeLists.txt
@@ -92,7 +92,6 @@
   MachineRegisterInfo.cpp
   MachineScheduler.cpp
   MachineSink.cpp
-  MachineSizeOpts.cpp
   MachineSSAUpdater.cpp
   MachineTraceMetrics.cpp
   MachineVerifier.cpp
diff --git a/lib/CodeGen/MachineBlockFrequencyInfo.cpp b/lib/CodeGen/MachineBlockFrequencyInfo.cpp
index 889fde6..53a35b7 100644
--- a/lib/CodeGen/MachineBlockFrequencyInfo.cpp
+++ b/lib/CodeGen/MachineBlockFrequencyInfo.cpp
@@ -172,13 +172,6 @@
   initializeMachineBlockFrequencyInfoPass(*PassRegistry::getPassRegistry());
 }
 
-MachineBlockFrequencyInfo::MachineBlockFrequencyInfo(
-      MachineFunction &F,
-      MachineBranchProbabilityInfo &MBPI,
-      MachineLoopInfo &MLI) : MachineFunctionPass(ID) {
-  calculate(F, MBPI, MLI);
-}
-
 MachineBlockFrequencyInfo::~MachineBlockFrequencyInfo() = default;
 
 void MachineBlockFrequencyInfo::getAnalysisUsage(AnalysisUsage &AU) const {
diff --git a/lib/CodeGen/MachineDominators.cpp b/lib/CodeGen/MachineDominators.cpp
index 0d57bca..706c706 100644
--- a/lib/CodeGen/MachineDominators.cpp
+++ b/lib/CodeGen/MachineDominators.cpp
@@ -49,15 +49,11 @@
 }
 
 bool MachineDominatorTree::runOnMachineFunction(MachineFunction &F) {
-  calculate(F);
-  return false;
-}
-
-void MachineDominatorTree::calculate(MachineFunction &F) {
   CriticalEdgesToSplit.clear();
   NewBBs.clear();
   DT.reset(new DomTreeBase<MachineBasicBlock>());
   DT->recalculate(F);
+  return false;
 }
 
 MachineDominatorTree::MachineDominatorTree()
diff --git a/lib/CodeGen/MachineLoopInfo.cpp b/lib/CodeGen/MachineLoopInfo.cpp
index 85822a6..3b8b430 100644
--- a/lib/CodeGen/MachineLoopInfo.cpp
+++ b/lib/CodeGen/MachineLoopInfo.cpp
@@ -36,13 +36,9 @@
 char &llvm::MachineLoopInfoID = MachineLoopInfo::ID;
 
 bool MachineLoopInfo::runOnMachineFunction(MachineFunction &) {
-  calculate(getAnalysis<MachineDominatorTree>());
-  return false;
-}
-
-void MachineLoopInfo::calculate(MachineDominatorTree &MDT) {
   releaseMemory();
-  LI.analyze(MDT.getBase());
+  LI.analyze(getAnalysis<MachineDominatorTree>().getBase());
+  return false;
 }
 
 void MachineLoopInfo::getAnalysisUsage(AnalysisUsage &AU) const {
diff --git a/lib/CodeGen/MachineSizeOpts.cpp b/lib/CodeGen/MachineSizeOpts.cpp
deleted file mode 100644
index 0c2ef33..0000000
--- a/lib/CodeGen/MachineSizeOpts.cpp
+++ /dev/null
@@ -1,120 +0,0 @@
-//===- MachineSizeOpts.cpp - code size optimization related code ----------===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-//
-// This file contains some shared machine IR code size optimization related
-// code.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/CodeGen/MachineSizeOpts.h"
-#include "llvm/Analysis/ProfileSummaryInfo.h"
-#include "llvm/CodeGen/MachineBlockFrequencyInfo.h"
-
-using namespace llvm;
-
-extern cl::opt<bool> EnablePGSO;
-extern cl::opt<bool> PGSOLargeWorkingSetSizeOnly;
-extern cl::opt<bool> ForcePGSO;
-extern cl::opt<int> PgsoCutoffInstrProf;
-extern cl::opt<int> PgsoCutoffSampleProf;
-
-namespace machine_size_opts_detail {
-
-/// Like ProfileSummaryInfo::isColdBlock but for MachineBasicBlock.
-bool isColdBlock(const MachineBasicBlock *MBB,
-                 ProfileSummaryInfo *PSI,
-                 const MachineBlockFrequencyInfo *MBFI) {
-  auto Count = MBFI->getBlockProfileCount(MBB);
-  return Count && PSI->isColdCount(*Count);
-}
-
-/// Like ProfileSummaryInfo::isHotBlockNthPercentile but for MachineBasicBlock.
-static bool isHotBlockNthPercentile(int PercentileCutoff,
-                                    const MachineBasicBlock *MBB,
-                                    ProfileSummaryInfo *PSI,
-                                    const MachineBlockFrequencyInfo *MBFI) {
-  auto Count = MBFI->getBlockProfileCount(MBB);
-  return Count && PSI->isHotCountNthPercentile(PercentileCutoff, *Count);
-}
-
-/// Like ProfileSummaryInfo::isFunctionColdInCallGraph but for
-/// MachineFunction.
-bool isFunctionColdInCallGraph(
-    const MachineFunction *MF,
-    ProfileSummaryInfo *PSI,
-    const MachineBlockFrequencyInfo &MBFI) {
-  if (auto FunctionCount = MF->getFunction().getEntryCount())
-    if (!PSI->isColdCount(FunctionCount.getCount()))
-      return false;
-  for (const auto &MBB : *MF)
-    if (!isColdBlock(&MBB, PSI, &MBFI))
-      return false;
-  return true;
-}
-
-/// Like ProfileSummaryInfo::isFunctionHotInCallGraphNthPercentile but for
-/// MachineFunction.
-bool isFunctionHotInCallGraphNthPercentile(
-    int PercentileCutoff,
-    const MachineFunction *MF,
-    ProfileSummaryInfo *PSI,
-    const MachineBlockFrequencyInfo &MBFI) {
-  if (auto FunctionCount = MF->getFunction().getEntryCount())
-    if (PSI->isHotCountNthPercentile(PercentileCutoff,
-                                     FunctionCount.getCount()))
-      return true;
-  for (const auto &MBB : *MF)
-    if (isHotBlockNthPercentile(PercentileCutoff, &MBB, PSI, &MBFI))
-      return true;
-  return false;
-}
-} // namespace machine_size_opts_detail
-
-namespace {
-struct MachineBasicBlockBFIAdapter {
-  static bool isFunctionColdInCallGraph(const MachineFunction *MF,
-                                        ProfileSummaryInfo *PSI,
-                                        const MachineBlockFrequencyInfo &MBFI) {
-    return machine_size_opts_detail::isFunctionColdInCallGraph(MF, PSI, MBFI);
-  }
-  static bool isFunctionHotInCallGraphNthPercentile(
-      int CutOff,
-      const MachineFunction *MF,
-      ProfileSummaryInfo *PSI,
-      const MachineBlockFrequencyInfo &MBFI) {
-    return machine_size_opts_detail::isFunctionHotInCallGraphNthPercentile(
-        CutOff, MF, PSI, MBFI);
-  }
-  static bool isColdBlock(const MachineBasicBlock *MBB,
-                          ProfileSummaryInfo *PSI,
-                          const MachineBlockFrequencyInfo *MBFI) {
-    return machine_size_opts_detail::isColdBlock(MBB, PSI, MBFI);
-  }
-  static bool isHotBlockNthPercentile(int CutOff,
-                                      const MachineBasicBlock *MBB,
-                                      ProfileSummaryInfo *PSI,
-                                      const MachineBlockFrequencyInfo *MBFI) {
-    return machine_size_opts_detail::isHotBlockNthPercentile(
-        CutOff, MBB, PSI, MBFI);
-  }
-};
-} // end anonymous namespace
-
-bool llvm::shouldOptimizeForSize(const MachineFunction *MF,
-                                 ProfileSummaryInfo *PSI,
-                                 const MachineBlockFrequencyInfo *MBFI) {
-  return shouldFuncOptimizeForSizeImpl<MachineBasicBlockBFIAdapter>(
-      MF, PSI, MBFI);
-}
-
-bool llvm::shouldOptimizeForSize(const MachineBasicBlock *MBB,
-                                 ProfileSummaryInfo *PSI,
-                                 const MachineBlockFrequencyInfo *MBFI) {
-  return shouldOptimizeForSizeImpl<MachineBasicBlockBFIAdapter>(
-      MBB, PSI, MBFI);
-}
diff --git a/lib/Transforms/Utils/SizeOpts.cpp b/lib/Transforms/Utils/SizeOpts.cpp
index f819c67..1519751 100644
--- a/lib/Transforms/Utils/SizeOpts.cpp
+++ b/lib/Transforms/Utils/SizeOpts.cpp
@@ -10,66 +10,28 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/Analysis/BlockFrequencyInfo.h"
+#include "llvm/Analysis/ProfileSummaryInfo.h"
+#include "llvm/Support/CommandLine.h"
 #include "llvm/Transforms/Utils/SizeOpts.h"
-
 using namespace llvm;
 
-cl::opt<bool> EnablePGSO(
+static cl::opt<bool> ProfileGuidedSizeOpt(
     "pgso", cl::Hidden, cl::init(true),
-    cl::desc("Enable the profile guided size optimizations. "));
+    cl::desc("Enable the profile guided size optimization. "));
 
-cl::opt<bool> PGSOLargeWorkingSetSizeOnly(
-    "pgso-lwss-only", cl::Hidden, cl::init(true),
-    cl::desc("Apply the profile guided size optimizations only "
-             "if the working set size is large (except for cold code.)"));
-
-cl::opt<bool> ForcePGSO(
-    "force-pgso", cl::Hidden, cl::init(false),
-    cl::desc("Force the (profiled-guided) size optimizations. "));
-
-cl::opt<int> PgsoCutoffInstrProf(
-    "pgso-cutoff-instr-prof", cl::Hidden, cl::init(250000), cl::ZeroOrMore,
-    cl::desc("The profile guided size optimization profile summary cutoff "
-             "for instrumentation profile."));
-
-cl::opt<int> PgsoCutoffSampleProf(
-    "pgso-cutoff-sample-prof", cl::Hidden, cl::init(800000), cl::ZeroOrMore,
-    cl::desc("The profile guided size optimization profile summary cutoff "
-             "for sample profile."));
-
-namespace {
-struct BasicBlockBFIAdapter {
-  static bool isFunctionColdInCallGraph(const Function *F,
-                                        ProfileSummaryInfo *PSI,
-                                        BlockFrequencyInfo &BFI) {
-    return PSI->isFunctionColdInCallGraph(F, BFI);
-  }
-  static bool isFunctionHotInCallGraphNthPercentile(int CutOff,
-                                                    const Function *F,
-                                                    ProfileSummaryInfo *PSI,
-                                                    BlockFrequencyInfo &BFI) {
-    return PSI->isFunctionHotInCallGraphNthPercentile(CutOff, F, BFI);
-  }
-  static bool isColdBlock(const BasicBlock *BB,
-                          ProfileSummaryInfo *PSI,
-                          BlockFrequencyInfo *BFI) {
-    return PSI->isColdBlock(BB, BFI);
-  }
-  static bool isHotBlockNthPercentile(int CutOff,
-                                      const BasicBlock *BB,
-                                      ProfileSummaryInfo *PSI,
-                                      BlockFrequencyInfo *BFI) {
-    return PSI->isHotBlockNthPercentile(CutOff, BB, BFI);
-  }
-};
-} // end anonymous namespace
-
-bool llvm::shouldOptimizeForSize(const Function *F, ProfileSummaryInfo *PSI,
+bool llvm::shouldOptimizeForSize(Function *F, ProfileSummaryInfo *PSI,
                                  BlockFrequencyInfo *BFI) {
-  return shouldFuncOptimizeForSizeImpl<BasicBlockBFIAdapter>(F, PSI, BFI);
+  assert(F);
+  if (!PSI || !BFI || !PSI->hasProfileSummary())
+    return false;
+  return ProfileGuidedSizeOpt && PSI->isFunctionColdInCallGraph(F, *BFI);
 }
 
-bool llvm::shouldOptimizeForSize(const BasicBlock *BB, ProfileSummaryInfo *PSI,
+bool llvm::shouldOptimizeForSize(BasicBlock *BB, ProfileSummaryInfo *PSI,
                                  BlockFrequencyInfo *BFI) {
-  return shouldOptimizeForSizeImpl<BasicBlockBFIAdapter>(BB, PSI, BFI);
+  assert(BB);
+  if (!PSI || !BFI || !PSI->hasProfileSummary())
+    return false;
+  return ProfileGuidedSizeOpt && PSI->isColdBlock(BB, BFI);
 }
diff --git a/unittests/CodeGen/CMakeLists.txt b/unittests/CodeGen/CMakeLists.txt
index 95cbafb..fc8cd22 100644
--- a/unittests/CodeGen/CMakeLists.txt
+++ b/unittests/CodeGen/CMakeLists.txt
@@ -19,7 +19,6 @@
   MachineInstrBundleIteratorTest.cpp
   MachineInstrTest.cpp
   MachineOperandTest.cpp
-  MachineSizeOptsTest.cpp
   ScalableVectorMVTsTest.cpp
   TypeTraitsTest.cpp
   TargetOptionsTest.cpp
diff --git a/unittests/CodeGen/MachineSizeOptsTest.cpp b/unittests/CodeGen/MachineSizeOptsTest.cpp
deleted file mode 100644
index f8b0c23..0000000
--- a/unittests/CodeGen/MachineSizeOptsTest.cpp
+++ /dev/null
@@ -1,234 +0,0 @@
-//===- MachineSizeOptsTest.cpp --------------------------------------------===//
-//
-// 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/CodeGen/MachineSizeOpts.h"
-#include "llvm/Analysis/ProfileSummaryInfo.h"
-#include "llvm/Analysis/BlockFrequencyInfo.h"
-#include "llvm/Analysis/BranchProbabilityInfo.h"
-#include "llvm/Analysis/LoopInfo.h"
-#include "llvm/CodeGen/MIRParser/MIRParser.h"
-#include "llvm/CodeGen/MachineBlockFrequencyInfo.h"
-#include "llvm/CodeGen/MachineBranchProbabilityInfo.h"
-#include "llvm/CodeGen/MachineDominators.h"
-#include "llvm/CodeGen/MachineLoopInfo.h"
-#include "llvm/CodeGen/MachineModuleInfo.h"
-#include "llvm/Support/TargetRegistry.h"
-#include "llvm/Support/TargetSelect.h"
-#include "llvm/Target/TargetMachine.h"
-#include "gtest/gtest.h"
-
-using namespace llvm;
-
-namespace {
-
-std::unique_ptr<LLVMTargetMachine> createTargetMachine() {
-  auto TT(Triple::normalize("x86_64--"));
-  std::string Error;
-  const Target *TheTarget = TargetRegistry::lookupTarget(TT, Error);
-  return std::unique_ptr<LLVMTargetMachine>(static_cast<LLVMTargetMachine*>(
-      TheTarget->createTargetMachine(TT, "", "", TargetOptions(), None, None,
-                                     CodeGenOpt::Default)));
-}
-
-class MachineSizeOptsTest : public testing::Test {
- protected:
-  static const char* MIRString;
-  LLVMContext Context;
-  std::unique_ptr<LLVMTargetMachine> TM;
-  std::unique_ptr<MachineModuleInfo> MMI;
-  std::unique_ptr<MIRParser> Parser;
-  std::unique_ptr<Module> M;
-  struct BFIData {
-    std::unique_ptr<MachineDominatorTree> MDT;
-    std::unique_ptr<MachineLoopInfo> MLI;
-    std::unique_ptr<MachineBranchProbabilityInfo> MBPI;
-    std::unique_ptr<MachineBlockFrequencyInfo> MBFI;
-    BFIData(MachineFunction &MF) {
-      MDT.reset(new MachineDominatorTree(MF));
-      MLI.reset(new MachineLoopInfo(*MDT));
-      MBPI.reset(new MachineBranchProbabilityInfo());
-      MBFI.reset(new MachineBlockFrequencyInfo(MF, *MBPI, *MLI));
-    }
-    MachineBlockFrequencyInfo *get() { return MBFI.get(); }
-  };
-
-  static void SetUpTestCase() {
-    InitializeAllTargets();
-    InitializeAllTargetMCs();
-  }
-
-  void SetUp() override {
-    TM = createTargetMachine();
-    std::unique_ptr<MemoryBuffer> MBuffer =
-        MemoryBuffer::getMemBuffer(MIRString);
-    Parser = createMIRParser(std::move(MBuffer), Context);
-    if (!Parser)
-      report_fatal_error("null MIRParser");
-    M = Parser->parseIRModule();
-    if (!M)
-      report_fatal_error("parseIRModule failed");
-    M->setTargetTriple(TM->getTargetTriple().getTriple());
-    M->setDataLayout(TM->createDataLayout());
-    MMI = std::make_unique<MachineModuleInfo>(TM.get());
-    if (Parser->parseMachineFunctions(*M, *MMI.get()))
-      report_fatal_error("parseMachineFunctions failed");
-  }
-
-  MachineFunction *getMachineFunction(Module *M, StringRef Name) {
-    auto F = M->getFunction(Name);
-    if (!F)
-      report_fatal_error("null Function");
-    auto &MF = MMI->getOrCreateMachineFunction(*F);
-    return &MF;
-  }
-};
-
-TEST_F(MachineSizeOptsTest, Test) {
-  MachineFunction *F = getMachineFunction(M.get(), "f");
-  ASSERT_TRUE(F != nullptr);
-  MachineFunction *G = getMachineFunction(M.get(), "g");
-  ASSERT_TRUE(G != nullptr);
-  MachineFunction *H = getMachineFunction(M.get(), "h");
-  ASSERT_TRUE(H != nullptr);
-  ProfileSummaryInfo PSI = ProfileSummaryInfo(*M.get());
-  ASSERT_TRUE(PSI.hasProfileSummary());
-  BFIData BFID_F(*F);
-  BFIData BFID_G(*G);
-  BFIData BFID_H(*H);
-  MachineBlockFrequencyInfo *MBFI_F = BFID_F.get();
-  MachineBlockFrequencyInfo *MBFI_G = BFID_G.get();
-  MachineBlockFrequencyInfo *MBFI_H = BFID_H.get();
-  MachineBasicBlock &BB0 = F->front();
-  auto iter = BB0.succ_begin();
-  MachineBasicBlock *BB1 = *iter;
-  iter++;
-  MachineBasicBlock *BB2 = *iter;
-  iter++;
-  ASSERT_TRUE(iter == BB0.succ_end());
-  MachineBasicBlock *BB3 = *BB1->succ_begin();
-  ASSERT_TRUE(BB3 == *BB2->succ_begin());
-  EXPECT_FALSE(shouldOptimizeForSize(F, &PSI, MBFI_F));
-  EXPECT_TRUE(shouldOptimizeForSize(G, &PSI, MBFI_G));
-  EXPECT_FALSE(shouldOptimizeForSize(H, &PSI, MBFI_H));
-  EXPECT_FALSE(shouldOptimizeForSize(&BB0, &PSI, MBFI_F));
-  EXPECT_FALSE(shouldOptimizeForSize(BB1, &PSI, MBFI_F));
-  EXPECT_TRUE(shouldOptimizeForSize(BB2, &PSI, MBFI_F));
-  EXPECT_FALSE(shouldOptimizeForSize(BB3, &PSI, MBFI_F));
-}
-
-const char* MachineSizeOptsTest::MIRString = R"MIR(
---- |
-  define i32 @g(i32 %x) !prof !14 {
-    ret i32 0
-  }
-
-  define i32 @h(i32 %x) !prof !15 {
-    ret i32 0
-  }
-
-  define i32 @f(i32 %x) !prof !16 {
-  bb0:
-    %y1 = icmp eq i32 %x, 0
-    br i1 %y1, label %bb1, label %bb2, !prof !17
-
-  bb1:                                              ; preds = %bb0
-    %z1 = call i32 @g(i32 %x)
-    br label %bb3
-
-  bb2:                                              ; preds = %bb0
-    %z2 = call i32 @h(i32 %x)
-    br label %bb3
-
-  bb3:                                              ; preds = %bb2, %bb1
-    %y2 = phi i32 [ 0, %bb1 ], [ 1, %bb2 ]
-    ret i32 %y2
-  }
-
-  !llvm.module.flags = !{!0}
-
-  !0 = !{i32 1, !"ProfileSummary", !1}
-  !1 = !{!2, !3, !4, !5, !6, !7, !8, !9}
-  !2 = !{!"ProfileFormat", !"InstrProf"}
-  !3 = !{!"TotalCount", i64 10000}
-  !4 = !{!"MaxCount", i64 10}
-  !5 = !{!"MaxInternalCount", i64 1}
-  !6 = !{!"MaxFunctionCount", i64 1000}
-  !7 = !{!"NumCounts", i64 3}
-  !8 = !{!"NumFunctions", i64 3}
-  !9 = !{!"DetailedSummary", !10}
-  !10 = !{!11, !12, !13}
-  !11 = !{i32 10000, i64 1000, i32 1}
-  !12 = !{i32 999000, i64 300, i32 3}
-  !13 = !{i32 999999, i64 5, i32 10}
-  !14 = !{!"function_entry_count", i64 1}
-  !15 = !{!"function_entry_count", i64 100}
-  !16 = !{!"function_entry_count", i64 400}
-  !17 = !{!"branch_weights", i32 100, i32 1}
-
-...
----
-name:            g
-body:             |
-  bb.0:
-    %1:gr32 = MOV32r0 implicit-def dead $eflags
-    $eax = COPY %1
-    RET 0, $eax
-
-...
----
-name:            h
-body:             |
-  bb.0:
-    %1:gr32 = MOV32r0 implicit-def dead $eflags
-    $eax = COPY %1
-    RET 0, $eax
-
-...
----
-name:            f
-tracksRegLiveness: true
-body:             |
-  bb.0:
-    successors: %bb.1(0x7ebb907a), %bb.2(0x01446f86)
-    liveins: $edi
-
-    %1:gr32 = COPY $edi
-    TEST32rr %1, %1, implicit-def $eflags
-    JCC_1 %bb.2, 5, implicit $eflags
-    JMP_1 %bb.1
-
-  bb.1:
-    successors: %bb.3(0x80000000)
-
-    ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
-    $edi = COPY %1
-    CALL64pcrel32 @g, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax
-    ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
-    %5:gr32 = COPY $eax
-    %4:gr32 = MOV32r0 implicit-def dead $eflags
-    JMP_1 %bb.3
-
-  bb.2:
-    successors: %bb.3(0x80000000)
-
-    ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
-    $edi = COPY %1
-    CALL64pcrel32 @h, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax
-    ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp
-    %3:gr32 = COPY $eax
-    %2:gr32 = MOV32ri 1
-
-  bb.3:
-    %0:gr32 = PHI %2, %bb.2, %4, %bb.1
-    $eax = COPY %0
-    RET 0, $eax
-
-...
-)MIR";
-
-} // anonymous namespace
diff --git a/unittests/Transforms/Utils/CMakeLists.txt b/unittests/Transforms/Utils/CMakeLists.txt
index bc993a8..785b798 100644
--- a/unittests/Transforms/Utils/CMakeLists.txt
+++ b/unittests/Transforms/Utils/CMakeLists.txt
@@ -14,7 +14,6 @@
   FunctionComparatorTest.cpp
   IntegerDivisionTest.cpp
   LocalTest.cpp
-  SizeOptsTest.cpp
   SSAUpdaterBulkTest.cpp
   UnrollLoopTest.cpp
   ValueMapperTest.cpp
diff --git a/unittests/Transforms/Utils/SizeOptsTest.cpp b/unittests/Transforms/Utils/SizeOptsTest.cpp
deleted file mode 100644
index 55ca786..0000000
--- a/unittests/Transforms/Utils/SizeOptsTest.cpp
+++ /dev/null
@@ -1,129 +0,0 @@
-//===- SizeOptsTest.cpp - SizeOpts unit tests -----------------------------===//
-//
-// 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/Transforms/Utils/SizeOpts.h"
-#include "llvm/Analysis/ProfileSummaryInfo.h"
-#include "llvm/Analysis/BlockFrequencyInfo.h"
-#include "llvm/Analysis/BranchProbabilityInfo.h"
-#include "llvm/Analysis/LoopInfo.h"
-#include "llvm/AsmParser/Parser.h"
-#include "llvm/IR/BasicBlock.h"
-#include "llvm/IR/Dominators.h"
-#include "llvm/IR/Function.h"
-#include "llvm/IR/LLVMContext.h"
-#include "llvm/IR/Module.h"
-#include "llvm/Support/FormatVariadic.h"
-#include "llvm/Support/SourceMgr.h"
-#include "gtest/gtest.h"
-
-using namespace llvm;
-
-namespace {
-
-class SizeOptsTest : public testing::Test {
-protected:
-  static const char* IRString;
-  LLVMContext C;
-  std::unique_ptr<Module> M;
-  struct BFIData {
-    std::unique_ptr<DominatorTree> DT;
-    std::unique_ptr<LoopInfo> LI;
-    std::unique_ptr<BranchProbabilityInfo> BPI;
-    std::unique_ptr<BlockFrequencyInfo> BFI;
-    BFIData(Function &F) {
-      DT.reset(new DominatorTree(F));
-      LI.reset(new LoopInfo(*DT));
-      BPI.reset(new BranchProbabilityInfo(F, *LI));
-      BFI.reset(new BlockFrequencyInfo(F, *BPI, *LI));
-    }
-    BlockFrequencyInfo *get() { return BFI.get(); }
-  };
-
-  void SetUp() override {
-    SMDiagnostic Err;
-    M = parseAssemblyString(IRString, Err, C);
-  }
-};
-
-TEST_F(SizeOptsTest, Test) {
-  Function *F = M->getFunction("f");
-  Function *G = M->getFunction("g");
-  Function *H = M->getFunction("h");
-
-  ProfileSummaryInfo PSI(*M.get());
-  BFIData BFID_F(*F);
-  BFIData BFID_G(*G);
-  BFIData BFID_H(*H);
-  BlockFrequencyInfo *BFI_F = BFID_F.get();
-  BlockFrequencyInfo *BFI_G = BFID_G.get();
-  BlockFrequencyInfo *BFI_H = BFID_H.get();
-  BasicBlock &BB0 = F->getEntryBlock();
-  BasicBlock *BB1 = BB0.getTerminator()->getSuccessor(0);
-  BasicBlock *BB2 = BB0.getTerminator()->getSuccessor(1);
-  BasicBlock *BB3 = BB1->getSingleSuccessor();
-
-  EXPECT_TRUE(PSI.hasProfileSummary());
-  EXPECT_FALSE(shouldOptimizeForSize(F, &PSI, BFI_F));
-  EXPECT_TRUE(shouldOptimizeForSize(G, &PSI, BFI_G));
-  EXPECT_FALSE(shouldOptimizeForSize(H, &PSI, BFI_H));
-  EXPECT_FALSE(shouldOptimizeForSize(&BB0, &PSI, BFI_F));
-  EXPECT_FALSE(shouldOptimizeForSize(BB1, &PSI, BFI_F));
-  EXPECT_TRUE(shouldOptimizeForSize(BB2, &PSI, BFI_F));
-  EXPECT_FALSE(shouldOptimizeForSize(BB3, &PSI, BFI_F));
-}
-
-const char* SizeOptsTest::IRString = R"IR(
-  define i32 @g(i32 %x) !prof !14 {
-    ret i32 0
-  }
-
-  define i32 @h(i32 %x) !prof !15 {
-    ret i32 0
-  }
-
-  define i32 @f(i32 %x) !prof !16 {
-  bb0:
-    %y1 = icmp eq i32 %x, 0
-    br i1 %y1, label %bb1, label %bb2, !prof !17
-
-  bb1:                                              ; preds = %bb0
-    %z1 = call i32 @g(i32 %x)
-    br label %bb3
-
-  bb2:                                              ; preds = %bb0
-    %z2 = call i32 @h(i32 %x)
-    br label %bb3
-
-  bb3:                                              ; preds = %bb2, %bb1
-    %y2 = phi i32 [ 0, %bb1 ], [ 1, %bb2 ]
-    ret i32 %y2
-  }
-
-  !llvm.module.flags = !{!0}
-
-  !0 = !{i32 1, !"ProfileSummary", !1}
-  !1 = !{!2, !3, !4, !5, !6, !7, !8, !9}
-  !2 = !{!"ProfileFormat", !"InstrProf"}
-  !3 = !{!"TotalCount", i64 10000}
-  !4 = !{!"MaxCount", i64 10}
-  !5 = !{!"MaxInternalCount", i64 1}
-  !6 = !{!"MaxFunctionCount", i64 1000}
-  !7 = !{!"NumCounts", i64 3}
-  !8 = !{!"NumFunctions", i64 3}
-  !9 = !{!"DetailedSummary", !10}
-  !10 = !{!11, !12, !13}
-  !11 = !{i32 10000, i64 1000, i32 1}
-  !12 = !{i32 999000, i64 300, i32 3}
-  !13 = !{i32 999999, i64 5, i32 10}
-  !14 = !{!"function_entry_count", i64 1}
-  !15 = !{!"function_entry_count", i64 100}
-  !16 = !{!"function_entry_count", i64 400}
-  !17 = !{!"branch_weights", i32 100, i32 1}
-)IR";
-
-} // end anonymous namespace