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diff --git a/clang-r353983/include/llvm/Analysis/LoopPass.h b/clang-r353983/include/llvm/Analysis/LoopPass.h
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+++ b/clang-r353983/include/llvm/Analysis/LoopPass.h
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+//===- LoopPass.h - LoopPass class ----------------------------------------===//
+//
+// 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 defines LoopPass class. All loop optimization
+// and transformation passes are derived from LoopPass.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ANALYSIS_LOOPPASS_H
+#define LLVM_ANALYSIS_LOOPPASS_H
+
+#include "llvm/Analysis/LoopInfo.h"
+#include "llvm/IR/LegacyPassManagers.h"
+#include "llvm/Pass.h"
+#include <deque>
+
+namespace llvm {
+
+class LPPassManager;
+class Function;
+class PMStack;
+
+class LoopPass : public Pass {
+public:
+  explicit LoopPass(char &pid) : Pass(PT_Loop, pid) {}
+
+  /// getPrinterPass - Get a pass to print the function corresponding
+  /// to a Loop.
+  Pass *createPrinterPass(raw_ostream &O,
+                          const std::string &Banner) const override;
+
+  // runOnLoop - This method should be implemented by the subclass to perform
+  // whatever action is necessary for the specified Loop.
+  virtual bool runOnLoop(Loop *L, LPPassManager &LPM) = 0;
+
+  using llvm::Pass::doInitialization;
+  using llvm::Pass::doFinalization;
+
+  // Initialization and finalization hooks.
+  virtual bool doInitialization(Loop *L, LPPassManager &LPM) {
+    return false;
+  }
+
+  // Finalization hook does not supply Loop because at this time
+  // loop nest is completely different.
+  virtual bool doFinalization() { return false; }
+
+  // Check if this pass is suitable for the current LPPassManager, if
+  // available. This pass P is not suitable for a LPPassManager if P
+  // is not preserving higher level analysis info used by other
+  // LPPassManager passes. In such case, pop LPPassManager from the
+  // stack. This will force assignPassManager() to create new
+  // LPPassManger as expected.
+  void preparePassManager(PMStack &PMS) override;
+
+  /// Assign pass manager to manage this pass
+  void assignPassManager(PMStack &PMS, PassManagerType PMT) override;
+
+  ///  Return what kind of Pass Manager can manage this pass.
+  PassManagerType getPotentialPassManagerType() const override {
+    return PMT_LoopPassManager;
+  }
+
+  //===--------------------------------------------------------------------===//
+  /// SimpleAnalysis - Provides simple interface to update analysis info
+  /// maintained by various passes. Note, if required this interface can
+  /// be extracted into a separate abstract class but it would require
+  /// additional use of multiple inheritance in Pass class hierarchy, something
+  /// we are trying to avoid.
+
+  /// Each loop pass can override these simple analysis hooks to update
+  /// desired analysis information.
+  /// cloneBasicBlockAnalysis - Clone analysis info associated with basic block.
+  virtual void cloneBasicBlockAnalysis(BasicBlock *F, BasicBlock *T, Loop *L) {}
+
+  /// deleteAnalysisValue - Delete analysis info associated with value V.
+  virtual void deleteAnalysisValue(Value *V, Loop *L) {}
+
+  /// Delete analysis info associated with Loop L.
+  /// Called to notify a Pass that a loop has been deleted and any
+  /// associated analysis values can be deleted.
+  virtual void deleteAnalysisLoop(Loop *L) {}
+
+protected:
+  /// Optional passes call this function to check whether the pass should be
+  /// skipped. This is the case when Attribute::OptimizeNone is set or when
+  /// optimization bisect is over the limit.
+  bool skipLoop(const Loop *L) const;
+};
+
+class LPPassManager : public FunctionPass, public PMDataManager {
+public:
+  static char ID;
+  explicit LPPassManager();
+
+  /// run - Execute all of the passes scheduled for execution.  Keep track of
+  /// whether any of the passes modifies the module, and if so, return true.
+  bool runOnFunction(Function &F) override;
+
+  /// Pass Manager itself does not invalidate any analysis info.
+  // LPPassManager needs LoopInfo.
+  void getAnalysisUsage(AnalysisUsage &Info) const override;
+
+  StringRef getPassName() const override { return "Loop Pass Manager"; }
+
+  PMDataManager *getAsPMDataManager() override { return this; }
+  Pass *getAsPass() override { return this; }
+
+  /// Print passes managed by this manager
+  void dumpPassStructure(unsigned Offset) override;
+
+  LoopPass *getContainedPass(unsigned N) {
+    assert(N < PassVector.size() && "Pass number out of range!");
+    LoopPass *LP = static_cast<LoopPass *>(PassVector[N]);
+    return LP;
+  }
+
+  PassManagerType getPassManagerType() const override {
+    return PMT_LoopPassManager;
+  }
+
+public:
+  // Add a new loop into the loop queue.
+  void addLoop(Loop &L);
+
+  // Mark \p L as deleted.
+  void markLoopAsDeleted(Loop &L);
+
+  //===--------------------------------------------------------------------===//
+  /// SimpleAnalysis - Provides simple interface to update analysis info
+  /// maintained by various passes. Note, if required this interface can
+  /// be extracted into a separate abstract class but it would require
+  /// additional use of multiple inheritance in Pass class hierarchy, something
+  /// we are trying to avoid.
+
+  /// cloneBasicBlockSimpleAnalysis - Invoke cloneBasicBlockAnalysis hook for
+  /// all passes that implement simple analysis interface.
+  void cloneBasicBlockSimpleAnalysis(BasicBlock *From, BasicBlock *To, Loop *L);
+
+  /// deleteSimpleAnalysisValue - Invoke deleteAnalysisValue hook for all passes
+  /// that implement simple analysis interface.
+  void deleteSimpleAnalysisValue(Value *V, Loop *L);
+
+  /// Invoke deleteAnalysisLoop hook for all passes that implement simple
+  /// analysis interface.
+  void deleteSimpleAnalysisLoop(Loop *L);
+
+private:
+  std::deque<Loop *> LQ;
+  LoopInfo *LI;
+  Loop *CurrentLoop;
+  bool CurrentLoopDeleted;
+};
+
+// This pass is required by the LCSSA transformation. It is used inside
+// LPPassManager to check if current pass preserves LCSSA form, and if it does
+// pass manager calls lcssa verification for the current loop.
+struct LCSSAVerificationPass : public FunctionPass {
+  static char ID;
+  LCSSAVerificationPass() : FunctionPass(ID) {
+    initializeLCSSAVerificationPassPass(*PassRegistry::getPassRegistry());
+  }
+
+  bool runOnFunction(Function &F) override { return false; }
+
+  void getAnalysisUsage(AnalysisUsage &AU) const override {
+    AU.setPreservesAll();
+  }
+};
+
+} // End llvm namespace
+
+#endif