intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

6 files changed, 1503 insertions, 0 deletions

diff --git a/contrib/libs/llvm12/include/llvm/Option/Arg.h b/contrib/libs/llvm12/include/llvm/Option/Arg.h
new file mode 100644
index 0000000000..abeae3b1a4
--- /dev/null
+++ b/contrib/libs/llvm12/include/llvm/Option/Arg.h
@@ -0,0 +1,162 @@
+#pragma once
+
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
+
+//===- Arg.h - Parsed Argument Classes --------------------------*- 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
+/// Defines the llvm::Arg class for parsed arguments.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_OPTION_ARG_H
+#define LLVM_OPTION_ARG_H
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Option/Option.h"
+#include <string>
+
+namespace llvm {
+
+class raw_ostream;
+
+namespace opt {
+
+class ArgList;
+
+/// A concrete instance of a particular driver option.
+///
+/// The Arg class encodes just enough information to be able to
+/// derive the argument values efficiently.
+class Arg {
+private:
+  /// The option this argument is an instance of.
+  const Option Opt;
+
+  /// The argument this argument was derived from (during tool chain
+  /// argument translation), if any.
+  const Arg *BaseArg;
+
+  /// How this instance of the option was spelled.
+  StringRef Spelling;
+
+  /// The index at which this argument appears in the containing
+  /// ArgList.
+  unsigned Index;
+
+  /// Was this argument used to effect compilation?
+  ///
+  /// This is used for generating "argument unused" diagnostics.
+  mutable unsigned Claimed : 1;
+
+  /// Does this argument own its values?
+  mutable unsigned OwnsValues : 1;
+
+  /// The argument values, as C strings.
+  SmallVector<const char *, 2> Values;
+
+  /// If this arg was created through an alias, this is the original alias arg.
+  /// For example, *this might be "-finput-charset=utf-8" and Alias might
+  /// point to an arg representing "/source-charset:utf-8".
+  std::unique_ptr<Arg> Alias;
+
+public:
+  Arg(const Option Opt, StringRef Spelling, unsigned Index,
+      const Arg *BaseArg = nullptr);
+  Arg(const Option Opt, StringRef Spelling, unsigned Index,
+      const char *Value0, const Arg *BaseArg = nullptr);
+  Arg(const Option Opt, StringRef Spelling, unsigned Index,
+      const char *Value0, const char *Value1, const Arg *BaseArg = nullptr);
+  Arg(const Arg &) = delete;
+  Arg &operator=(const Arg &) = delete;
+  ~Arg();
+
+  const Option &getOption() const { return Opt; }
+
+  /// Returns the used prefix and name of the option:
+  /// For `--foo=bar`, returns `--foo=`.
+  /// This is often the wrong function to call:
+  /// * Use `getValue()` to get `bar`.
+  /// * Use `getAsString()` to get a string suitable for printing an Arg in
+  ///   a diagnostic.
+  StringRef getSpelling() const { return Spelling; }
+
+  unsigned getIndex() const { return Index; }
+
+  /// Return the base argument which generated this arg.
+  ///
+  /// This is either the argument itself or the argument it was
+  /// derived from during tool chain specific argument translation.
+  const Arg &getBaseArg() const {
+    return BaseArg ? *BaseArg : *this;
+  }
+  void setBaseArg(const Arg *BaseArg) { this->BaseArg = BaseArg; }
+
+  /// Args are converted to their unaliased form.  For args that originally
+  /// came from an alias, this returns the alias the arg was produced from.
+  const Arg* getAlias() const { return Alias.get(); }
+  void setAlias(std::unique_ptr<Arg> Alias) { this->Alias = std::move(Alias); }
+
+  bool getOwnsValues() const { return OwnsValues; }
+  void setOwnsValues(bool Value) const { OwnsValues = Value; }
+
+  bool isClaimed() const { return getBaseArg().Claimed; }
+
+  /// Set the Arg claimed bit.
+  void claim() const { getBaseArg().Claimed = true; }
+
+  unsigned getNumValues() const { return Values.size(); }
+
+  const char *getValue(unsigned N = 0) const {
+    return Values[N];
+  }
+
+  SmallVectorImpl<const char *> &getValues() { return Values; }
+  const SmallVectorImpl<const char *> &getValues() const { return Values; }
+
+  bool containsValue(StringRef Value) const {
+    for (unsigned i = 0, e = getNumValues(); i != e; ++i)
+      if (Values[i] == Value)
+        return true;
+    return false;
+  }
+
+  /// Append the argument onto the given array as strings.
+  void render(const ArgList &Args, ArgStringList &Output) const;
+
+  /// Append the argument, render as an input, onto the given
+  /// array as strings.
+  ///
+  /// The distinction is that some options only render their values
+  /// when rendered as a input (e.g., Xlinker).
+  void renderAsInput(const ArgList &Args, ArgStringList &Output) const;
+
+  void print(raw_ostream &O) const;
+  void dump() const;
+
+  /// Return a formatted version of the argument and its values, for
+  /// diagnostics. Since this is for diagnostics, if this Arg was produced
+  /// through an alias, this returns the string representation of the alias
+  /// that the user wrote.
+  std::string getAsString(const ArgList &Args) const;
+};
+
+} // end namespace opt
+
+} // end namespace llvm
+
+#endif // LLVM_OPTION_ARG_H
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
diff --git a/contrib/libs/llvm12/include/llvm/Option/ArgList.h b/contrib/libs/llvm12/include/llvm/Option/ArgList.h
new file mode 100644
index 0000000000..b6efeb641d
--- /dev/null
+++ b/contrib/libs/llvm12/include/llvm/Option/ArgList.h
@@ -0,0 +1,536 @@
+#pragma once
+
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
+
+//===- ArgList.h - Argument List Management ---------------------*- 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_OPTION_ARGLIST_H
+#define LLVM_OPTION_ARGLIST_H
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/iterator_range.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/Option/Arg.h"
+#include "llvm/Option/OptSpecifier.h"
+#include "llvm/Option/Option.h"
+#include <algorithm>
+#include <cstddef>
+#include <initializer_list>
+#include <iterator>
+#include <list>
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
+namespace llvm {
+
+class raw_ostream;
+
+namespace opt {
+
+/// arg_iterator - Iterates through arguments stored inside an ArgList.
+template<typename BaseIter, unsigned NumOptSpecifiers = 0>
+class arg_iterator {
+  /// The current argument and the end of the sequence we're iterating.
+  BaseIter Current, End;
+
+  /// Optional filters on the arguments which will be match. To avoid a
+  /// zero-sized array, we store one specifier even if we're asked for none.
+  OptSpecifier Ids[NumOptSpecifiers ? NumOptSpecifiers : 1];
+
+  void SkipToNextArg() {
+    for (; Current != End; ++Current) {
+      // Skip erased elements.
+      if (!*Current)
+        continue;
+
+      // Done if there are no filters.
+      if (!NumOptSpecifiers)
+        return;
+
+      // Otherwise require a match.
+      const Option &O = (*Current)->getOption();
+      for (auto Id : Ids) {
+        if (!Id.isValid())
+          break;
+        if (O.matches(Id))
+          return;
+      }
+    }
+  }
+
+  using Traits = std::iterator_traits<BaseIter>;
+
+public:
+  using value_type = typename Traits::value_type;
+  using reference = typename Traits::reference;
+  using pointer = typename Traits::pointer;
+  using iterator_category = std::forward_iterator_tag;
+  using difference_type = std::ptrdiff_t;
+
+  arg_iterator(
+      BaseIter Current, BaseIter End,
+      const OptSpecifier (&Ids)[NumOptSpecifiers ? NumOptSpecifiers : 1] = {})
+      : Current(Current), End(End) {
+    for (unsigned I = 0; I != NumOptSpecifiers; ++I)
+      this->Ids[I] = Ids[I];
+    SkipToNextArg();
+  }
+
+  reference operator*() const { return *Current; }
+  pointer operator->() const { return Current; }
+
+  arg_iterator &operator++() {
+    ++Current;
+    SkipToNextArg();
+    return *this;
+  }
+
+  arg_iterator operator++(int) {
+    arg_iterator tmp(*this);
+    ++(*this);
+    return tmp;
+  }
+
+  friend bool operator==(arg_iterator LHS, arg_iterator RHS) {
+    return LHS.Current == RHS.Current;
+  }
+  friend bool operator!=(arg_iterator LHS, arg_iterator RHS) {
+    return !(LHS == RHS);
+  }
+};
+
+/// ArgList - Ordered collection of driver arguments.
+///
+/// The ArgList class manages a list of Arg instances as well as
+/// auxiliary data and convenience methods to allow Tools to quickly
+/// check for the presence of Arg instances for a particular Option
+/// and to iterate over groups of arguments.
+class ArgList {
+public:
+  using arglist_type = SmallVector<Arg *, 16>;
+  using iterator = arg_iterator<arglist_type::iterator>;
+  using const_iterator = arg_iterator<arglist_type::const_iterator>;
+  using reverse_iterator = arg_iterator<arglist_type::reverse_iterator>;
+  using const_reverse_iterator =
+      arg_iterator<arglist_type::const_reverse_iterator>;
+
+  template<unsigned N> using filtered_iterator =
+      arg_iterator<arglist_type::const_iterator, N>;
+  template<unsigned N> using filtered_reverse_iterator =
+      arg_iterator<arglist_type::const_reverse_iterator, N>;
+
+private:
+  /// The internal list of arguments.
+  arglist_type Args;
+
+  using OptRange = std::pair<unsigned, unsigned>;
+  static OptRange emptyRange() { return {-1u, 0u}; }
+
+  /// The first and last index of each different OptSpecifier ID.
+  DenseMap<unsigned, OptRange> OptRanges;
+
+  /// Get the range of indexes in which options with the specified IDs might
+  /// reside, or (0, 0) if there are no such options.
+  OptRange getRange(std::initializer_list<OptSpecifier> Ids) const;
+
+protected:
+  // Make the default special members protected so they won't be used to slice
+  // derived objects, but can still be used by derived objects to implement
+  // their own special members.
+  ArgList() = default;
+
+  // Explicit move operations to ensure the container is cleared post-move
+  // otherwise it could lead to a double-delete in the case of moving of an
+  // InputArgList which deletes the contents of the container. If we could fix
+  // up the ownership here (delegate storage/ownership to the derived class so
+  // it can be a container of unique_ptr) this would be simpler.
+  ArgList(ArgList &&RHS)
+      : Args(std::move(RHS.Args)), OptRanges(std::move(RHS.OptRanges)) {
+    RHS.Args.clear();
+    RHS.OptRanges.clear();
+  }
+
+  ArgList &operator=(ArgList &&RHS) {
+    Args = std::move(RHS.Args);
+    RHS.Args.clear();
+    OptRanges = std::move(RHS.OptRanges);
+    RHS.OptRanges.clear();
+    return *this;
+  }
+
+  // Protect the dtor to ensure this type is never destroyed polymorphically.
+  ~ArgList() = default;
+
+  // Implicitly convert a value to an OptSpecifier. Used to work around a bug
+  // in MSVC's implementation of narrowing conversion checking.
+  static OptSpecifier toOptSpecifier(OptSpecifier S) { return S; }
+
+public:
+  /// @name Arg Access
+  /// @{
+
+  /// append - Append \p A to the arg list.
+  void append(Arg *A);
+
+  const arglist_type &getArgs() const { return Args; }
+
+  unsigned size() const { return Args.size(); }
+
+  /// @}
+  /// @name Arg Iteration
+  /// @{
+
+  iterator begin() { return {Args.begin(), Args.end()}; }
+  iterator end() { return {Args.end(), Args.end()}; }
+
+  reverse_iterator rbegin() { return {Args.rbegin(), Args.rend()}; }
+  reverse_iterator rend() { return {Args.rend(), Args.rend()}; }
+
+  const_iterator begin() const { return {Args.begin(), Args.end()}; }
+  const_iterator end() const { return {Args.end(), Args.end()}; }
+
+  const_reverse_iterator rbegin() const { return {Args.rbegin(), Args.rend()}; }
+  const_reverse_iterator rend() const { return {Args.rend(), Args.rend()}; }
+
+  template<typename ...OptSpecifiers>
+  iterator_range<filtered_iterator<sizeof...(OptSpecifiers)>>
+  filtered(OptSpecifiers ...Ids) const {
+    OptRange Range = getRange({toOptSpecifier(Ids)...});
+    auto B = Args.begin() + Range.first;
+    auto E = Args.begin() + Range.second;
+    using Iterator = filtered_iterator<sizeof...(OptSpecifiers)>;
+    return make_range(Iterator(B, E, {toOptSpecifier(Ids)...}),
+                      Iterator(E, E, {toOptSpecifier(Ids)...}));
+  }
+
+  template<typename ...OptSpecifiers>
+  iterator_range<filtered_reverse_iterator<sizeof...(OptSpecifiers)>>
+  filtered_reverse(OptSpecifiers ...Ids) const {
+    OptRange Range = getRange({toOptSpecifier(Ids)...});
+    auto B = Args.rend() - Range.second;
+    auto E = Args.rend() - Range.first;
+    using Iterator = filtered_reverse_iterator<sizeof...(OptSpecifiers)>;
+    return make_range(Iterator(B, E, {toOptSpecifier(Ids)...}),
+                      Iterator(E, E, {toOptSpecifier(Ids)...}));
+  }
+
+  /// @}
+  /// @name Arg Removal
+  /// @{
+
+  /// eraseArg - Remove any option matching \p Id.
+  void eraseArg(OptSpecifier Id);
+
+  /// @}
+  /// @name Arg Access
+  /// @{
+
+  /// hasArg - Does the arg list contain any option matching \p Id.
+  ///
+  /// \p Claim Whether the argument should be claimed, if it exists.
+  template<typename ...OptSpecifiers>
+  bool hasArgNoClaim(OptSpecifiers ...Ids) const {
+    return getLastArgNoClaim(Ids...) != nullptr;
+  }
+  template<typename ...OptSpecifiers>
+  bool hasArg(OptSpecifiers ...Ids) const {
+    return getLastArg(Ids...) != nullptr;
+  }
+
+  /// Return the last argument matching \p Id, or null.
+  template<typename ...OptSpecifiers>
+  Arg *getLastArg(OptSpecifiers ...Ids) const {
+    Arg *Res = nullptr;
+    for (Arg *A : filtered(Ids...)) {
+      Res = A;
+      Res->claim();
+    }
+    return Res;
+  }
+
+  /// Return the last argument matching \p Id, or null. Do not "claim" the
+  /// option (don't mark it as having been used).
+  template<typename ...OptSpecifiers>
+  Arg *getLastArgNoClaim(OptSpecifiers ...Ids) const {
+    for (Arg *A : filtered_reverse(Ids...))
+      return A;
+    return nullptr;
+  }
+
+  /// getArgString - Return the input argument string at \p Index.
+  virtual const char *getArgString(unsigned Index) const = 0;
+
+  /// getNumInputArgStrings - Return the number of original argument strings,
+  /// which are guaranteed to be the first strings in the argument string
+  /// list.
+  virtual unsigned getNumInputArgStrings() const = 0;
+
+  /// @}
+  /// @name Argument Lookup Utilities
+  /// @{
+
+  /// getLastArgValue - Return the value of the last argument, or a default.
+  StringRef getLastArgValue(OptSpecifier Id, StringRef Default = "") const;
+
+  /// getAllArgValues - Get the values of all instances of the given argument
+  /// as strings.
+  std::vector<std::string> getAllArgValues(OptSpecifier Id) const;
+
+  /// @}
+  /// @name Translation Utilities
+  /// @{
+
+  /// hasFlag - Given an option \p Pos and its negative form \p Neg, return
+  /// true if the option is present, false if the negation is present, and
+  /// \p Default if neither option is given. If both the option and its
+  /// negation are present, the last one wins.
+  bool hasFlag(OptSpecifier Pos, OptSpecifier Neg, bool Default=true) const;
+
+  /// hasFlag - Given an option \p Pos, an alias \p PosAlias and its negative
+  /// form \p Neg, return true if the option or its alias is present, false if
+  /// the negation is present, and \p Default if none of the options are
+  /// given. If multiple options are present, the last one wins.
+  bool hasFlag(OptSpecifier Pos, OptSpecifier PosAlias, OptSpecifier Neg,
+               bool Default = true) const;
+
+  /// Render only the last argument match \p Id0, if present.
+  template<typename ...OptSpecifiers>
+  void AddLastArg(ArgStringList &Output, OptSpecifiers ...Ids) const {
+    if (Arg *A = getLastArg(Ids...)) // Calls claim() on all Ids's Args.
+      A->render(*this, Output);
+  }
+
+  /// AddAllArgsExcept - Render all arguments matching any of the given ids
+  /// and not matching any of the excluded ids.
+  void AddAllArgsExcept(ArgStringList &Output, ArrayRef<OptSpecifier> Ids,
+                        ArrayRef<OptSpecifier> ExcludeIds) const;
+  /// AddAllArgs - Render all arguments matching any of the given ids.
+  void AddAllArgs(ArgStringList &Output, ArrayRef<OptSpecifier> Ids) const;
+
+  /// AddAllArgs - Render all arguments matching the given ids.
+  void AddAllArgs(ArgStringList &Output, OptSpecifier Id0,
+                  OptSpecifier Id1 = 0U, OptSpecifier Id2 = 0U) const;
+
+  /// AddAllArgValues - Render the argument values of all arguments
+  /// matching the given ids.
+  void AddAllArgValues(ArgStringList &Output, OptSpecifier Id0,
+                       OptSpecifier Id1 = 0U, OptSpecifier Id2 = 0U) const;
+
+  /// AddAllArgsTranslated - Render all the arguments matching the
+  /// given ids, but forced to separate args and using the provided
+  /// name instead of the first option value.
+  ///
+  /// \param Joined - If true, render the argument as joined with
+  /// the option specifier.
+  void AddAllArgsTranslated(ArgStringList &Output, OptSpecifier Id0,
+                            const char *Translation,
+                            bool Joined = false) const;
+
+  /// ClaimAllArgs - Claim all arguments which match the given
+  /// option id.
+  void ClaimAllArgs(OptSpecifier Id0) const;
+
+  /// ClaimAllArgs - Claim all arguments.
+  ///
+  void ClaimAllArgs() const;
+
+  /// @}
+  /// @name Arg Synthesis
+  /// @{
+
+  /// Construct a constant string pointer whose
+  /// lifetime will match that of the ArgList.
+  virtual const char *MakeArgStringRef(StringRef Str) const = 0;
+  const char *MakeArgString(const Twine &Str) const {
+    SmallString<256> Buf;
+    return MakeArgStringRef(Str.toStringRef(Buf));
+  }
+
+  /// Create an arg string for (\p LHS + \p RHS), reusing the
+  /// string at \p Index if possible.
+  const char *GetOrMakeJoinedArgString(unsigned Index, StringRef LHS,
+                                        StringRef RHS) const;
+
+  void print(raw_ostream &O) const;
+  void dump() const;
+
+  /// @}
+};
+
+class InputArgList final : public ArgList {
+private:
+  /// List of argument strings used by the contained Args.
+  ///
+  /// This is mutable since we treat the ArgList as being the list
+  /// of Args, and allow routines to add new strings (to have a
+  /// convenient place to store the memory) via MakeIndex.
+  mutable ArgStringList ArgStrings;
+
+  /// Strings for synthesized arguments.
+  ///
+  /// This is mutable since we treat the ArgList as being the list
+  /// of Args, and allow routines to add new strings (to have a
+  /// convenient place to store the memory) via MakeIndex.
+  mutable std::list<std::string> SynthesizedStrings;
+
+  /// The number of original input argument strings.
+  unsigned NumInputArgStrings;
+
+  /// Release allocated arguments.
+  void releaseMemory();
+
+public:
+  InputArgList() : NumInputArgStrings(0) {}
+
+  InputArgList(const char* const *ArgBegin, const char* const *ArgEnd);
+
+  InputArgList(InputArgList &&RHS)
+      : ArgList(std::move(RHS)), ArgStrings(std::move(RHS.ArgStrings)),
+        SynthesizedStrings(std::move(RHS.SynthesizedStrings)),
+        NumInputArgStrings(RHS.NumInputArgStrings) {}
+
+  InputArgList &operator=(InputArgList &&RHS) {
+    releaseMemory();
+    ArgList::operator=(std::move(RHS));
+    ArgStrings = std::move(RHS.ArgStrings);
+    SynthesizedStrings = std::move(RHS.SynthesizedStrings);
+    NumInputArgStrings = RHS.NumInputArgStrings;
+    return *this;
+  }
+
+  ~InputArgList() { releaseMemory(); }
+
+  const char *getArgString(unsigned Index) const override {
+    return ArgStrings[Index];
+  }
+
+  void replaceArgString(unsigned Index, const Twine &S) {
+    ArgStrings[Index] = MakeArgString(S);
+  }
+
+  unsigned getNumInputArgStrings() const override {
+    return NumInputArgStrings;
+  }
+
+  /// @name Arg Synthesis
+  /// @{
+
+public:
+  /// MakeIndex - Get an index for the given string(s).
+  unsigned MakeIndex(StringRef String0) const;
+  unsigned MakeIndex(StringRef String0, StringRef String1) const;
+
+  using ArgList::MakeArgString;
+  const char *MakeArgStringRef(StringRef Str) const override;
+
+  /// @}
+};
+
+/// DerivedArgList - An ordered collection of driver arguments,
+/// whose storage may be in another argument list.
+class DerivedArgList final : public ArgList {
+  const InputArgList &BaseArgs;
+
+  /// The list of arguments we synthesized.
+  mutable SmallVector<std::unique_ptr<Arg>, 16> SynthesizedArgs;
+
+public:
+  /// Construct a new derived arg list from \p BaseArgs.
+  DerivedArgList(const InputArgList &BaseArgs);
+
+  const char *getArgString(unsigned Index) const override {
+    return BaseArgs.getArgString(Index);
+  }
+
+  unsigned getNumInputArgStrings() const override {
+    return BaseArgs.getNumInputArgStrings();
+  }
+
+  const InputArgList &getBaseArgs() const {
+    return BaseArgs;
+  }
+
+  /// @name Arg Synthesis
+  /// @{
+
+  /// AddSynthesizedArg - Add a argument to the list of synthesized arguments
+  /// (to be freed).
+  void AddSynthesizedArg(Arg *A);
+
+  using ArgList::MakeArgString;
+  const char *MakeArgStringRef(StringRef Str) const override;
+
+  /// AddFlagArg - Construct a new FlagArg for the given option \p Id and
+  /// append it to the argument list.
+  void AddFlagArg(const Arg *BaseArg, const Option Opt) {
+    append(MakeFlagArg(BaseArg, Opt));
+  }
+
+  /// AddPositionalArg - Construct a new Positional arg for the given option
+  /// \p Id, with the provided \p Value and append it to the argument
+  /// list.
+  void AddPositionalArg(const Arg *BaseArg, const Option Opt,
+                        StringRef Value) {
+    append(MakePositionalArg(BaseArg, Opt, Value));
+  }
+
+  /// AddSeparateArg - Construct a new Positional arg for the given option
+  /// \p Id, with the provided \p Value and append it to the argument
+  /// list.
+  void AddSeparateArg(const Arg *BaseArg, const Option Opt,
+                      StringRef Value) {
+    append(MakeSeparateArg(BaseArg, Opt, Value));
+  }
+
+  /// AddJoinedArg - Construct a new Positional arg for the given option
+  /// \p Id, with the provided \p Value and append it to the argument list.
+  void AddJoinedArg(const Arg *BaseArg, const Option Opt,
+                    StringRef Value) {
+    append(MakeJoinedArg(BaseArg, Opt, Value));
+  }
+
+  /// MakeFlagArg - Construct a new FlagArg for the given option \p Id.
+  Arg *MakeFlagArg(const Arg *BaseArg, const Option Opt) const;
+
+  /// MakePositionalArg - Construct a new Positional arg for the
+  /// given option \p Id, with the provided \p Value.
+  Arg *MakePositionalArg(const Arg *BaseArg, const Option Opt,
+                          StringRef Value) const;
+
+  /// MakeSeparateArg - Construct a new Positional arg for the
+  /// given option \p Id, with the provided \p Value.
+  Arg *MakeSeparateArg(const Arg *BaseArg, const Option Opt,
+                        StringRef Value) const;
+
+  /// MakeJoinedArg - Construct a new Positional arg for the
+  /// given option \p Id, with the provided \p Value.
+  Arg *MakeJoinedArg(const Arg *BaseArg, const Option Opt,
+                      StringRef Value) const;
+
+  /// @}
+};
+
+} // end namespace opt
+
+} // end namespace llvm
+
+#endif // LLVM_OPTION_ARGLIST_H
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
diff --git a/contrib/libs/llvm12/include/llvm/Option/OptParser.td b/contrib/libs/llvm12/include/llvm/Option/OptParser.td
new file mode 100644
index 0000000000..9a179c511b
--- /dev/null
+++ b/contrib/libs/llvm12/include/llvm/Option/OptParser.td
@@ -0,0 +1,234 @@
+//===--- OptParser.td - Common Option Parsing Interfaces ------------------===//
+//
+// 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 the common interfaces used by the option parsing TableGen
+//  backend.
+//
+//===----------------------------------------------------------------------===//
+
+// Define the kinds of options.
+
+class OptionKind<string name, int precedence = 0, bit sentinel = false> {
+  string Name = name;
+  // The kind precedence, kinds with lower precedence are matched first.
+  int Precedence = precedence;
+  // Indicate a sentinel option.
+  bit Sentinel = sentinel;
+}
+
+// An option group.
+def KIND_GROUP : OptionKind<"Group">;
+// The input option kind.
+def KIND_INPUT : OptionKind<"Input", 1, true>;
+// The unknown option kind.
+def KIND_UNKNOWN : OptionKind<"Unknown", 2, true>;
+// A flag with no values.
+def KIND_FLAG : OptionKind<"Flag">;
+// An option which prefixes its (single) value.
+def KIND_JOINED : OptionKind<"Joined", 1>;
+// An option which is followed by its value.
+def KIND_SEPARATE : OptionKind<"Separate">;
+// An option followed by its values, which are separated by commas.
+def KIND_COMMAJOINED : OptionKind<"CommaJoined">;
+// An option which is which takes multiple (separate) arguments.
+def KIND_MULTIARG : OptionKind<"MultiArg">;
+// An option which is either joined to its (non-empty) value, or followed by its
+// value.
+def KIND_JOINED_OR_SEPARATE : OptionKind<"JoinedOrSeparate">;
+// An option which is both joined to its (first) value, and followed by its
+// (second) value.
+def KIND_JOINED_AND_SEPARATE : OptionKind<"JoinedAndSeparate">;
+// An option which consumes all remaining arguments if there are any.
+def KIND_REMAINING_ARGS : OptionKind<"RemainingArgs">;
+// An option which consumes an optional joined argument and any other remaining
+// arguments.
+def KIND_REMAINING_ARGS_JOINED : OptionKind<"RemainingArgsJoined">;
+
+// Define the option flags.
+
+class OptionFlag {}
+
+// HelpHidden - The option should not be displayed in --help, even if it has
+// help text. Clients *can* use this in conjunction with the OptTable::PrintHelp
+// arguments to implement hidden help groups.
+def HelpHidden : OptionFlag;
+
+// RenderAsInput - The option should not render the name when rendered as an
+// input (i.e., the option is rendered as values).
+def RenderAsInput : OptionFlag;
+
+// RenderJoined - The option should be rendered joined, even if separate (only
+// sensible on single value separate options).
+def RenderJoined : OptionFlag;
+
+// RenderSeparate - The option should be rendered separately, even if joined
+// (only sensible on joined options).
+def RenderSeparate : OptionFlag;
+
+// Define the option group class.
+
+class OptionGroup<string name> {
+  string EnumName = ?; // Uses the def name if undefined.
+  string Name = name;
+  string HelpText = ?;
+  OptionGroup Group = ?;
+  list<OptionFlag> Flags = [];
+}
+
+// Define the option class.
+
+class Option<list<string> prefixes, string name, OptionKind kind> {
+  string EnumName = ?; // Uses the def name if undefined.
+  list<string> Prefixes = prefixes;
+  string Name = name;
+  OptionKind Kind = kind;
+  // Used by MultiArg option kind.
+  int NumArgs = 0;
+  string HelpText = ?;
+  string MetaVarName = ?;
+  string Values = ?;
+  code ValuesCode = ?;
+  list<OptionFlag> Flags = [];
+  OptionGroup Group = ?;
+  Option Alias = ?;
+  list<string> AliasArgs = [];
+  code MacroPrefix = "";
+  code KeyPath = ?;
+  code DefaultValue = ?;
+  code ImpliedValue = ?;
+  code ImpliedCheck = "false";
+  code ShouldParse = "true";
+  bit ShouldAlwaysEmit = false;
+  code NormalizerRetTy = ?;
+  code NormalizedValuesScope = "";
+  code Normalizer = "";
+  code Denormalizer = "";
+  code ValueMerger = "mergeForwardValue";
+  code ValueExtractor = "extractForwardValue";
+  list<code> NormalizedValues = ?;
+}
+
+// Helpers for defining options.
+
+class Flag<list<string> prefixes, string name>
+  : Option<prefixes, name, KIND_FLAG>;
+class Joined<list<string> prefixes, string name>
+  : Option<prefixes, name, KIND_JOINED>;
+class Separate<list<string> prefixes, string name>
+  : Option<prefixes, name, KIND_SEPARATE>;
+class CommaJoined<list<string> prefixes, string name>
+  : Option<prefixes, name, KIND_COMMAJOINED>;
+class MultiArg<list<string> prefixes, string name, int numargs>
+  : Option<prefixes, name, KIND_MULTIARG> {
+  int NumArgs = numargs;
+}
+class JoinedOrSeparate<list<string> prefixes, string name>
+  : Option<prefixes, name, KIND_JOINED_OR_SEPARATE>;
+class JoinedAndSeparate<list<string> prefixes, string name>
+  : Option<prefixes, name, KIND_JOINED_AND_SEPARATE>;
+
+// Mix-ins for adding optional attributes.
+
+class Alias<Option alias> { Option Alias = alias; }
+class AliasArgs<list<string> aliasargs> { list<string> AliasArgs = aliasargs; }
+class EnumName<string name> { string EnumName = name; }
+class Flags<list<OptionFlag> flags> { list<OptionFlag> Flags = flags; }
+class Group<OptionGroup group> { OptionGroup Group = group; }
+class HelpText<string text> { string HelpText = text; }
+class MetaVarName<string name> { string MetaVarName = name; }
+class Values<string value> { string Values = value; }
+class ValuesCode<code valuecode> { code ValuesCode = valuecode; }
+
+// Helpers for defining marshalling information.
+
+class KeyPathAndMacro<string key_path_prefix, string key_path_base,
+                      string macro_prefix = ""> {
+  code KeyPath = !strconcat(key_path_prefix, key_path_base);
+  code MacroPrefix = macro_prefix;
+}
+
+def EmptyKPM : KeyPathAndMacro<"", "">;
+
+class ImpliedByAnyOf<list<string> key_paths, code value = "true"> {
+  code ImpliedCheck = !foldl("false", key_paths, accumulator, key_path,
+                             !strconcat(accumulator, " || ", key_path));
+  code ImpliedValue = value;
+}
+
+class MarshallingInfo<KeyPathAndMacro kpm, code defaultvalue> {
+  code KeyPath = kpm.KeyPath;
+  code MacroPrefix = kpm.MacroPrefix;
+  code DefaultValue = defaultvalue;
+}
+
+class MarshallingInfoString<KeyPathAndMacro kpm, code defaultvalue="std::string()">
+  : MarshallingInfo<kpm, defaultvalue> {
+  code Normalizer = "normalizeString";
+  code Denormalizer = "denormalizeString";
+}
+
+class MarshallingInfoStringInt<KeyPathAndMacro kpm, code defaultvalue="0", code type="unsigned">
+  : MarshallingInfo<kpm, defaultvalue> {
+  code Normalizer = "normalizeStringIntegral<"#type#">";
+  code Denormalizer = "denormalizeString";
+}
+
+class MarshallingInfoStringVector<KeyPathAndMacro kpm>
+  : MarshallingInfo<kpm, "std::vector<std::string>({})"> {
+  code Normalizer = "normalizeStringVector";
+  code Denormalizer = "denormalizeStringVector";
+}
+
+class MarshallingInfoFlag<KeyPathAndMacro kpm, code defaultvalue = "false">
+  : MarshallingInfo<kpm, defaultvalue> {
+  code Normalizer = "normalizeSimpleFlag";
+  code Denormalizer = "denormalizeSimpleFlag";
+}
+
+class MarshallingInfoNegativeFlag<KeyPathAndMacro kpm, code defaultvalue = "true">
+  : MarshallingInfo<kpm, defaultvalue> {
+  code Normalizer = "normalizeSimpleNegativeFlag";
+  code Denormalizer = "denormalizeSimpleFlag";
+}
+
+class MarshallingInfoBitfieldFlag<KeyPathAndMacro kpm, code value>
+  : MarshallingInfoFlag<kpm, "0u"> {
+  code Normalizer = "makeFlagToValueNormalizer("#value#")";
+  code ValueMerger = "mergeMaskValue";
+  code ValueExtractor = "(extractMaskValue<unsigned, decltype("#value#"), "#value#">)";
+}
+
+// Marshalling info for booleans. Applied to the flag setting keypath to false.
+class MarshallingInfoBooleanFlag<KeyPathAndMacro kpm, code defaultvalue, code value, code name,
+                                 code other_value, code other_name>
+  : MarshallingInfoFlag<kpm, defaultvalue> {
+  code Normalizer = "makeBooleanOptionNormalizer("#value#", "#other_value#", OPT_"#other_name#")";
+  code Denormalizer = "makeBooleanOptionDenormalizer("#value#")";
+}
+
+// Mixins for additional marshalling attributes.
+
+class ShouldParseIf<code condition> { code ShouldParse = condition; }
+class AlwaysEmit { bit ShouldAlwaysEmit = true; }
+class Normalizer<code normalizer> { code Normalizer = normalizer; }
+class Denormalizer<code denormalizer> { code Denormalizer = denormalizer; }
+class NormalizedValuesScope<code scope> { code NormalizedValuesScope = scope; }
+class NormalizedValues<list<code> definitions> { list<code> NormalizedValues = definitions; } 
+class AutoNormalizeEnum {
+  code Normalizer = "normalizeSimpleEnum";
+  code Denormalizer = "denormalizeSimpleEnum";
+}
+class ValueMerger<code merger> { code ValueMerger = merger; }
+class ValueExtractor<code extractor> { code ValueExtractor = extractor; }
+
+// Predefined options.
+
+// FIXME: Have generator validate that these appear in correct position (and
+// aren't duplicated).
+def INPUT : Option<[], "<input>", KIND_INPUT>;
+def UNKNOWN : Option<[], "<unknown>", KIND_UNKNOWN>;
diff --git a/contrib/libs/llvm12/include/llvm/Option/OptSpecifier.h b/contrib/libs/llvm12/include/llvm/Option/OptSpecifier.h
new file mode 100644
index 0000000000..2515cb1f29
--- /dev/null
+++ b/contrib/libs/llvm12/include/llvm/Option/OptSpecifier.h
@@ -0,0 +1,49 @@
+#pragma once
+
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
+
+//===- OptSpecifier.h - Option Specifiers -----------------------*- 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_OPTION_OPTSPECIFIER_H
+#define LLVM_OPTION_OPTSPECIFIER_H
+
+namespace llvm {
+namespace opt {
+
+class Option;
+
+/// OptSpecifier - Wrapper class for abstracting references to option IDs.
+class OptSpecifier {
+  unsigned ID = 0;
+
+public:
+  OptSpecifier() = default;
+  explicit OptSpecifier(bool) = delete;
+  /*implicit*/ OptSpecifier(unsigned ID) : ID(ID) {}
+  /*implicit*/ OptSpecifier(const Option *Opt);
+
+  bool isValid() const { return ID != 0; }
+
+  unsigned getID() const { return ID; }
+
+  bool operator==(OptSpecifier Opt) const { return ID == Opt.getID(); }
+  bool operator!=(OptSpecifier Opt) const { return !(*this == Opt); }
+};
+
+} // end namespace opt
+} // end namespace llvm
+
+#endif // LLVM_OPTION_OPTSPECIFIER_H
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
diff --git a/contrib/libs/llvm12/include/llvm/Option/OptTable.h b/contrib/libs/llvm12/include/llvm/Option/OptTable.h
new file mode 100644
index 0000000000..f7553d2b4b
--- /dev/null
+++ b/contrib/libs/llvm12/include/llvm/Option/OptTable.h
@@ -0,0 +1,275 @@
+#pragma once
+
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
+
+//===- OptTable.h - Option Table --------------------------------*- 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_OPTION_OPTTABLE_H
+#define LLVM_OPTION_OPTTABLE_H
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/StringSet.h"
+#include "llvm/Option/OptSpecifier.h"
+#include "llvm/Support/StringSaver.h"
+#include <cassert>
+#include <string>
+#include <vector>
+
+namespace llvm {
+
+class raw_ostream;
+template <typename Fn> class function_ref;
+
+namespace opt {
+
+class Arg;
+class ArgList;
+class InputArgList;
+class Option;
+
+/// Provide access to the Option info table.
+///
+/// The OptTable class provides a layer of indirection which allows Option
+/// instance to be created lazily. In the common case, only a few options will
+/// be needed at runtime; the OptTable class maintains enough information to
+/// parse command lines without instantiating Options, while letting other
+/// parts of the driver still use Option instances where convenient.
+class OptTable {
+public:
+  /// Entry for a single option instance in the option data table.
+  struct Info {
+    /// A null terminated array of prefix strings to apply to name while
+    /// matching.
+    const char *const *Prefixes;
+    const char *Name;
+    const char *HelpText;
+    const char *MetaVar;
+    unsigned ID;
+    unsigned char Kind;
+    unsigned char Param;
+    unsigned int Flags;
+    unsigned short GroupID;
+    unsigned short AliasID;
+    const char *AliasArgs;
+    const char *Values;
+  };
+
+private:
+  /// The option information table.
+  std::vector<Info> OptionInfos;
+  bool IgnoreCase;
+  bool GroupedShortOptions = false;
+  const char *EnvVar = nullptr;
+
+  unsigned TheInputOptionID = 0;
+  unsigned TheUnknownOptionID = 0;
+
+  /// The index of the first option which can be parsed (i.e., is not a
+  /// special option like 'input' or 'unknown', and is not an option group).
+  unsigned FirstSearchableIndex = 0;
+
+  /// The union of all option prefixes. If an argument does not begin with
+  /// one of these, it is an input.
+  StringSet<> PrefixesUnion;
+  std::string PrefixChars;
+
+private:
+  const Info &getInfo(OptSpecifier Opt) const {
+    unsigned id = Opt.getID();
+    assert(id > 0 && id - 1 < getNumOptions() && "Invalid Option ID.");
+    return OptionInfos[id - 1];
+  }
+
+  Arg *parseOneArgGrouped(InputArgList &Args, unsigned &Index) const;
+
+protected:
+  OptTable(ArrayRef<Info> OptionInfos, bool IgnoreCase = false);
+
+public:
+  ~OptTable();
+
+  /// Return the total number of option classes.
+  unsigned getNumOptions() const { return OptionInfos.size(); }
+
+  /// Get the given Opt's Option instance, lazily creating it
+  /// if necessary.
+  ///
+  /// \return The option, or null for the INVALID option id.
+  const Option getOption(OptSpecifier Opt) const;
+
+  /// Lookup the name of the given option.
+  const char *getOptionName(OptSpecifier id) const {
+    return getInfo(id).Name;
+  }
+
+  /// Get the kind of the given option.
+  unsigned getOptionKind(OptSpecifier id) const {
+    return getInfo(id).Kind;
+  }
+
+  /// Get the group id for the given option.
+  unsigned getOptionGroupID(OptSpecifier id) const {
+    return getInfo(id).GroupID;
+  }
+
+  /// Get the help text to use to describe this option.
+  const char *getOptionHelpText(OptSpecifier id) const {
+    return getInfo(id).HelpText;
+  }
+
+  /// Get the meta-variable name to use when describing
+  /// this options values in the help text.
+  const char *getOptionMetaVar(OptSpecifier id) const {
+    return getInfo(id).MetaVar;
+  }
+
+  /// Specify the environment variable where initial options should be read.
+  void setInitialOptionsFromEnvironment(const char *E) { EnvVar = E; }
+
+  /// Support grouped short options. e.g. -ab represents -a -b.
+  void setGroupedShortOptions(bool Value) { GroupedShortOptions = Value; }
+
+  /// Find possible value for given flags. This is used for shell
+  /// autocompletion.
+  ///
+  /// \param [in] Option - Key flag like "-stdlib=" when "-stdlib=l"
+  /// was passed to clang.
+  ///
+  /// \param [in] Arg - Value which we want to autocomplete like "l"
+  /// when "-stdlib=l" was passed to clang.
+  ///
+  /// \return The vector of possible values.
+  std::vector<std::string> suggestValueCompletions(StringRef Option,
+                                                   StringRef Arg) const;
+
+  /// Find flags from OptTable which starts with Cur.
+  ///
+  /// \param [in] Cur - String prefix that all returned flags need
+  //  to start with.
+  ///
+  /// \return The vector of flags which start with Cur.
+  std::vector<std::string> findByPrefix(StringRef Cur,
+                                        unsigned int DisableFlags) const;
+
+  /// Find the OptTable option that most closely matches the given string.
+  ///
+  /// \param [in] Option - A string, such as "-stdlibs=l", that represents user
+  /// input of an option that may not exist in the OptTable. Note that the
+  /// string includes prefix dashes "-" as well as values "=l".
+  /// \param [out] NearestString - The nearest option string found in the
+  /// OptTable.
+  /// \param [in] FlagsToInclude - Only find options with any of these flags.
+  /// Zero is the default, which includes all flags.
+  /// \param [in] FlagsToExclude - Don't find options with this flag. Zero
+  /// is the default, and means exclude nothing.
+  /// \param [in] MinimumLength - Don't find options shorter than this length.
+  /// For example, a minimum length of 3 prevents "-x" from being considered
+  /// near to "-S".
+  ///
+  /// \return The edit distance of the nearest string found.
+  unsigned findNearest(StringRef Option, std::string &NearestString,
+                       unsigned FlagsToInclude = 0, unsigned FlagsToExclude = 0,
+                       unsigned MinimumLength = 4) const;
+
+  /// Add Values to Option's Values class
+  ///
+  /// \param [in] Option - Prefix + Name of the flag which Values will be
+  ///  changed. For example, "-analyzer-checker".
+  /// \param [in] Values - String of Values seperated by ",", such as
+  ///  "foo, bar..", where foo and bar is the argument which the Option flag
+  ///  takes
+  ///
+  /// \return true in success, and false in fail.
+  bool addValues(const char *Option, const char *Values);
+
+  /// Parse a single argument; returning the new argument and
+  /// updating Index.
+  ///
+  /// \param [in,out] Index - The current parsing position in the argument
+  /// string list; on return this will be the index of the next argument
+  /// string to parse.
+  /// \param [in] FlagsToInclude - Only parse options with any of these flags.
+  /// Zero is the default which includes all flags.
+  /// \param [in] FlagsToExclude - Don't parse options with this flag.  Zero
+  /// is the default and means exclude nothing.
+  ///
+  /// \return The parsed argument, or 0 if the argument is missing values
+  /// (in which case Index still points at the conceptual next argument string
+  /// to parse).
+  Arg *ParseOneArg(const ArgList &Args, unsigned &Index,
+                   unsigned FlagsToInclude = 0,
+                   unsigned FlagsToExclude = 0) const;
+
+  /// Parse an list of arguments into an InputArgList.
+  ///
+  /// The resulting InputArgList will reference the strings in [\p ArgBegin,
+  /// \p ArgEnd), and their lifetime should extend past that of the returned
+  /// InputArgList.
+  ///
+  /// The only error that can occur in this routine is if an argument is
+  /// missing values; in this case \p MissingArgCount will be non-zero.
+  ///
+  /// \param MissingArgIndex - On error, the index of the option which could
+  /// not be parsed.
+  /// \param MissingArgCount - On error, the number of missing options.
+  /// \param FlagsToInclude - Only parse options with any of these flags.
+  /// Zero is the default which includes all flags.
+  /// \param FlagsToExclude - Don't parse options with this flag.  Zero
+  /// is the default and means exclude nothing.
+  /// \return An InputArgList; on error this will contain all the options
+  /// which could be parsed.
+  InputArgList ParseArgs(ArrayRef<const char *> Args, unsigned &MissingArgIndex,
+                         unsigned &MissingArgCount, unsigned FlagsToInclude = 0,
+                         unsigned FlagsToExclude = 0) const;
+
+  /// A convenience helper which handles optional initial options populated from
+  /// an environment variable, expands response files recursively and parses
+  /// options.
+  ///
+  /// \param ErrorFn - Called on a formatted error message for missing arguments
+  /// or unknown options.
+  /// \return An InputArgList; on error this will contain all the options which
+  /// could be parsed.
+  InputArgList parseArgs(int Argc, char *const *Argv, OptSpecifier Unknown,
+                         StringSaver &Saver,
+                         function_ref<void(StringRef)> ErrorFn) const;
+
+  /// Render the help text for an option table.
+  ///
+  /// \param OS - The stream to write the help text to.
+  /// \param Usage - USAGE: Usage
+  /// \param Title - OVERVIEW: Title
+  /// \param FlagsToInclude - If non-zero, only include options with any
+  ///                         of these flags set.
+  /// \param FlagsToExclude - Exclude options with any of these flags set.
+  /// \param ShowAllAliases - If true, display all options including aliases
+  ///                         that don't have help texts. By default, we display
+  ///                         only options that are not hidden and have help
+  ///                         texts.
+  void PrintHelp(raw_ostream &OS, const char *Usage, const char *Title,
+                 unsigned FlagsToInclude, unsigned FlagsToExclude,
+                 bool ShowAllAliases) const;
+
+  void PrintHelp(raw_ostream &OS, const char *Usage, const char *Title,
+                 bool ShowHidden = false, bool ShowAllAliases = false) const;
+};
+
+} // end namespace opt
+
+} // end namespace llvm
+
+#endif // LLVM_OPTION_OPTTABLE_H
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
diff --git a/contrib/libs/llvm12/include/llvm/Option/Option.h b/contrib/libs/llvm12/include/llvm/Option/Option.h
new file mode 100644
index 0000000000..6bc4436754
--- /dev/null
+++ b/contrib/libs/llvm12/include/llvm/Option/Option.h
@@ -0,0 +1,247 @@
+#pragma once
+
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
+
+//===- Option.h - Abstract Driver Options -----------------------*- 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_OPTION_OPTION_H
+#define LLVM_OPTION_OPTION_H
+
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Option/OptSpecifier.h"
+#include "llvm/Option/OptTable.h"
+#include "llvm/Support/ErrorHandling.h"
+#include <cassert>
+#include <string>
+
+namespace llvm {
+
+class raw_ostream;
+
+namespace opt {
+
+class Arg;
+class ArgList;
+
+/// ArgStringList - Type used for constructing argv lists for subprocesses.
+using ArgStringList = SmallVector<const char *, 16>;
+
+/// Base flags for all options. Custom flags may be added after.
+enum DriverFlag {
+  HelpHidden       = (1 << 0),
+  RenderAsInput    = (1 << 1),
+  RenderJoined     = (1 << 2),
+  RenderSeparate   = (1 << 3)
+};
+
+/// Option - Abstract representation for a single form of driver
+/// argument.
+///
+/// An Option class represents a form of option that the driver
+/// takes, for example how many arguments the option has and how
+/// they can be provided. Individual option instances store
+/// additional information about what group the option is a member
+/// of (if any), if the option is an alias, and a number of
+/// flags. At runtime the driver parses the command line into
+/// concrete Arg instances, each of which corresponds to a
+/// particular Option instance.
+class Option {
+public:
+  enum OptionClass {
+    GroupClass = 0,
+    InputClass,
+    UnknownClass,
+    FlagClass,
+    JoinedClass,
+    ValuesClass,
+    SeparateClass,
+    RemainingArgsClass,
+    RemainingArgsJoinedClass,
+    CommaJoinedClass,
+    MultiArgClass,
+    JoinedOrSeparateClass,
+    JoinedAndSeparateClass
+  };
+
+  enum RenderStyleKind {
+    RenderCommaJoinedStyle,
+    RenderJoinedStyle,
+    RenderSeparateStyle,
+    RenderValuesStyle
+  };
+
+protected:
+  const OptTable::Info *Info;
+  const OptTable *Owner;
+
+public:
+  Option(const OptTable::Info *Info, const OptTable *Owner);
+
+  bool isValid() const {
+    return Info != nullptr;
+  }
+
+  unsigned getID() const {
+    assert(Info && "Must have a valid info!");
+    return Info->ID;
+  }
+
+  OptionClass getKind() const {
+    assert(Info && "Must have a valid info!");
+    return OptionClass(Info->Kind);
+  }
+
+  /// Get the name of this option without any prefix.
+  StringRef getName() const {
+    assert(Info && "Must have a valid info!");
+    return Info->Name;
+  }
+
+  const Option getGroup() const {
+    assert(Info && "Must have a valid info!");
+    assert(Owner && "Must have a valid owner!");
+    return Owner->getOption(Info->GroupID);
+  }
+
+  const Option getAlias() const {
+    assert(Info && "Must have a valid info!");
+    assert(Owner && "Must have a valid owner!");
+    return Owner->getOption(Info->AliasID);
+  }
+
+  /// Get the alias arguments as a \0 separated list.
+  /// E.g. ["foo", "bar"] would be returned as "foo\0bar\0".
+  const char *getAliasArgs() const {
+    assert(Info && "Must have a valid info!");
+    assert((!Info->AliasArgs || Info->AliasArgs[0] != 0) &&
+           "AliasArgs should be either 0 or non-empty.");
+
+    return Info->AliasArgs;
+  }
+
+  /// Get the default prefix for this option.
+  StringRef getPrefix() const {
+    const char *Prefix = *Info->Prefixes;
+    return Prefix ? Prefix : StringRef();
+  }
+
+  /// Get the name of this option with the default prefix.
+  std::string getPrefixedName() const {
+    std::string Ret(getPrefix());
+    Ret += getName();
+    return Ret;
+  }
+
+  /// Get the help text for this option.
+  StringRef getHelpText() const {
+    assert(Info && "Must have a valid info!");
+    return Info->HelpText;
+  }
+
+  /// Get the meta-variable list for this option.
+  StringRef getMetaVar() const {
+    assert(Info && "Must have a valid info!");
+    return Info->MetaVar;
+  }
+
+  unsigned getNumArgs() const { return Info->Param; }
+
+  bool hasNoOptAsInput() const { return Info->Flags & RenderAsInput;}
+
+  RenderStyleKind getRenderStyle() const {
+    if (Info->Flags & RenderJoined)
+      return RenderJoinedStyle;
+    if (Info->Flags & RenderSeparate)
+      return RenderSeparateStyle;
+    switch (getKind()) {
+    case GroupClass:
+    case InputClass:
+    case UnknownClass:
+      return RenderValuesStyle;
+    case JoinedClass:
+    case JoinedAndSeparateClass:
+      return RenderJoinedStyle;
+    case CommaJoinedClass:
+      return RenderCommaJoinedStyle;
+    case FlagClass:
+    case ValuesClass:
+    case SeparateClass:
+    case MultiArgClass:
+    case JoinedOrSeparateClass:
+    case RemainingArgsClass:
+    case RemainingArgsJoinedClass:
+      return RenderSeparateStyle;
+    }
+    llvm_unreachable("Unexpected kind!");
+  }
+
+  /// Test if this option has the flag \a Val.
+  bool hasFlag(unsigned Val) const {
+    return Info->Flags & Val;
+  }
+
+  /// getUnaliasedOption - Return the final option this option
+  /// aliases (itself, if the option has no alias).
+  const Option getUnaliasedOption() const {
+    const Option Alias = getAlias();
+    if (Alias.isValid()) return Alias.getUnaliasedOption();
+    return *this;
+  }
+
+  /// getRenderName - Return the name to use when rendering this
+  /// option.
+  StringRef getRenderName() const {
+    return getUnaliasedOption().getName();
+  }
+
+  /// matches - Predicate for whether this option is part of the
+  /// given option (which may be a group).
+  ///
+  /// Note that matches against options which are an alias should never be
+  /// done -- aliases do not participate in matching and so such a query will
+  /// always be false.
+  bool matches(OptSpecifier ID) const;
+
+  /// accept - Potentially accept the current argument, returning a
+  /// new Arg instance, or 0 if the option does not accept this
+  /// argument (or the argument is missing values).
+  ///
+  /// If the option accepts the current argument, accept() sets
+  /// Index to the position where argument parsing should resume
+  /// (even if the argument is missing values).
+  ///
+  /// \p CurArg The argument to be matched. It may be shorter than the
+  /// underlying storage to represent a Joined argument.
+  /// \p GroupedShortOption If true, we are handling the fallback case of
+  /// parsing a prefix of the current argument as a short option.
+  Arg *accept(const ArgList &Args, StringRef CurArg, bool GroupedShortOption,
+              unsigned &Index) const;
+
+private:
+  Arg *acceptInternal(const ArgList &Args, StringRef CurArg,
+                      unsigned &Index) const;
+
+public:
+  void print(raw_ostream &O) const;
+  void dump() const;
+};
+
+} // end namespace opt
+
+} // end namespace llvm
+
+#endif // LLVM_OPTION_OPTION_H
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif