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diff --git a/clang-r353983/include/llvm/IR/LegacyPassNameParser.h b/clang-r353983/include/llvm/IR/LegacyPassNameParser.h
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+++ b/clang-r353983/include/llvm/IR/LegacyPassNameParser.h
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+//===- LegacyPassNameParser.h -----------------------------------*- 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 the PassNameParser and FilteredPassNameParser<> classes,
+// which are used to add command line arguments to a utility for all of the
+// passes that have been registered into the system.
+//
+// The PassNameParser class adds ALL passes linked into the system (that are
+// creatable) as command line arguments to the tool (when instantiated with the
+// appropriate command line option template).  The FilteredPassNameParser<>
+// template is used for the same purposes as PassNameParser, except that it only
+// includes passes that have a PassType that are compatible with the filter
+// (which is the template argument).
+//
+// Note that this is part of the legacy pass manager infrastructure and will be
+// (eventually) going away.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_IR_LEGACYPASSNAMEPARSER_H
+#define LLVM_IR_LEGACYPASSNAMEPARSER_H
+
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/Pass.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cstring>
+
+namespace llvm {
+
+//===----------------------------------------------------------------------===//
+// PassNameParser class - Make use of the pass registration mechanism to
+// automatically add a command line argument to opt for each pass.
+//
+class PassNameParser : public PassRegistrationListener,
+                       public cl::parser<const PassInfo*> {
+public:
+  PassNameParser(cl::Option &O);
+  ~PassNameParser() override;
+
+  void initialize() {
+    cl::parser<const PassInfo*>::initialize();
+
+    // Add all of the passes to the map that got initialized before 'this' did.
+    enumeratePasses();
+  }
+
+  // ignorablePassImpl - Can be overriden in subclasses to refine the list of
+  // which passes we want to include.
+  //
+  virtual bool ignorablePassImpl(const PassInfo *P) const { return false; }
+
+  inline bool ignorablePass(const PassInfo *P) const {
+    // Ignore non-selectable and non-constructible passes!  Ignore
+    // non-optimizations.
+    return P->getPassArgument().empty() || P->getNormalCtor() == nullptr ||
+           ignorablePassImpl(P);
+  }
+
+  // Implement the PassRegistrationListener callbacks used to populate our map
+  //
+  void passRegistered(const PassInfo *P) override {
+    if (ignorablePass(P)) return;
+    if (findOption(P->getPassArgument().data()) != getNumOptions()) {
+      errs() << "Two passes with the same argument (-"
+           << P->getPassArgument() << ") attempted to be registered!\n";
+      llvm_unreachable(nullptr);
+    }
+    addLiteralOption(P->getPassArgument().data(), P, P->getPassName().data());
+  }
+  void passEnumerate(const PassInfo *P) override { passRegistered(P); }
+
+  // printOptionInfo - Print out information about this option.  Override the
+  // default implementation to sort the table before we print...
+  void printOptionInfo(const cl::Option &O, size_t GlobalWidth) const override {
+    PassNameParser *PNP = const_cast<PassNameParser*>(this);
+    array_pod_sort(PNP->Values.begin(), PNP->Values.end(), ValCompare);
+    cl::parser<const PassInfo*>::printOptionInfo(O, GlobalWidth);
+  }
+
+private:
+  // ValCompare - Provide a sorting comparator for Values elements...
+  static int ValCompare(const PassNameParser::OptionInfo *VT1,
+                        const PassNameParser::OptionInfo *VT2) {
+    return VT1->Name.compare(VT2->Name);
+  }
+};
+
+///===----------------------------------------------------------------------===//
+/// FilteredPassNameParser class - Make use of the pass registration
+/// mechanism to automatically add a command line argument to opt for
+/// each pass that satisfies a filter criteria.  Filter should return
+/// true for passes to be registered as command-line options.
+///
+template<typename Filter>
+class FilteredPassNameParser : public PassNameParser {
+private:
+  Filter filter;
+
+public:
+  bool ignorablePassImpl(const PassInfo *P) const override {
+    return !filter(*P);
+  }
+};
+
+///===----------------------------------------------------------------------===//
+/// PassArgFilter - A filter for use with PassNameFilterParser that only
+/// accepts a Pass whose Arg matches certain strings.
+///
+/// Use like this:
+///
+/// extern const char AllowedPassArgs[] = "-anders_aa -dse";
+///
+/// static cl::list<
+///   const PassInfo*,
+///   bool,
+///   FilteredPassNameParser<PassArgFilter<AllowedPassArgs> > >
+/// PassList(cl::desc("Passes available:"));
+///
+/// Only the -anders_aa and -dse options will be available to the user.
+///
+template<const char *Args>
+class PassArgFilter {
+public:
+  bool operator()(const PassInfo &P) const {
+    return StringRef(Args).contains(P.getPassArgument());
+  }
+};
+
+} // End llvm namespace
+
+#endif