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diff --git a/clang-r353983/include/llvm/Analysis/ObjCARCAliasAnalysis.h b/clang-r353983/include/llvm/Analysis/ObjCARCAliasAnalysis.h
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+//===- ObjCARCAliasAnalysis.h - ObjC ARC Alias Analysis ---------*- 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
+//
+//===----------------------------------------------------------------------===//
+/// \file
+/// This file declares a simple ARC-aware AliasAnalysis using special knowledge
+/// of Objective C to enhance other optimization passes which rely on the Alias
+/// Analysis infrastructure.
+///
+/// WARNING: This file knows about certain library functions. It recognizes them
+/// by name, and hardwires knowledge of their semantics.
+///
+/// WARNING: This file knows about how certain Objective-C library functions are
+/// used. Naive LLVM IR transformations which would otherwise be
+/// behavior-preserving may break these assumptions.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ANALYSIS_OBJCARCALIASANALYSIS_H
+#define LLVM_ANALYSIS_OBJCARCALIASANALYSIS_H
+
+#include "llvm/Analysis/AliasAnalysis.h"
+#include "llvm/Pass.h"
+
+namespace llvm {
+namespace objcarc {
+
+/// This is a simple alias analysis implementation that uses knowledge
+/// of ARC constructs to answer queries.
+///
+/// TODO: This class could be generalized to know about other ObjC-specific
+/// tricks. Such as knowing that ivars in the non-fragile ABI are non-aliasing
+/// even though their offsets are dynamic.
+class ObjCARCAAResult : public AAResultBase<ObjCARCAAResult> {
+  friend AAResultBase<ObjCARCAAResult>;
+
+  const DataLayout &DL;
+
+public:
+  explicit ObjCARCAAResult(const DataLayout &DL) : AAResultBase(), DL(DL) {}
+  ObjCARCAAResult(ObjCARCAAResult &&Arg)
+      : AAResultBase(std::move(Arg)), DL(Arg.DL) {}
+
+  /// Handle invalidation events from the new pass manager.
+  ///
+  /// By definition, this result is stateless and so remains valid.
+  bool invalidate(Function &, const PreservedAnalyses &,
+                  FunctionAnalysisManager::Invalidator &) {
+    return false;
+  }
+
+  AliasResult alias(const MemoryLocation &LocA, const MemoryLocation &LocB);
+  bool pointsToConstantMemory(const MemoryLocation &Loc, bool OrLocal);
+
+  using AAResultBase::getModRefBehavior;
+  FunctionModRefBehavior getModRefBehavior(const Function *F);
+
+  using AAResultBase::getModRefInfo;
+  ModRefInfo getModRefInfo(const CallBase *Call, const MemoryLocation &Loc);
+};
+
+/// Analysis pass providing a never-invalidated alias analysis result.
+class ObjCARCAA : public AnalysisInfoMixin<ObjCARCAA> {
+  friend AnalysisInfoMixin<ObjCARCAA>;
+  static AnalysisKey Key;
+
+public:
+  typedef ObjCARCAAResult Result;
+
+  ObjCARCAAResult run(Function &F, FunctionAnalysisManager &AM);
+};
+
+/// Legacy wrapper pass to provide the ObjCARCAAResult object.
+class ObjCARCAAWrapperPass : public ImmutablePass {
+  std::unique_ptr<ObjCARCAAResult> Result;
+
+public:
+  static char ID;
+
+  ObjCARCAAWrapperPass();
+
+  ObjCARCAAResult &getResult() { return *Result; }
+  const ObjCARCAAResult &getResult() const { return *Result; }
+
+  bool doInitialization(Module &M) override;
+  bool doFinalization(Module &M) override;
+  void getAnalysisUsage(AnalysisUsage &AU) const override;
+};
+
+} // namespace objcarc
+} // namespace llvm
+
+#endif