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diff --git a/contrib/llvm-project/llvm/utils/TableGen/SubtargetFeatureInfo.h b/contrib/llvm-project/llvm/utils/TableGen/SubtargetFeatureInfo.h
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+++ b/contrib/llvm-project/llvm/utils/TableGen/SubtargetFeatureInfo.h
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+//===- SubtargetFeatureInfo.h - Helpers for subtarget features --*- 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_UTIL_TABLEGEN_SUBTARGETFEATUREINFO_H
+#define LLVM_UTIL_TABLEGEN_SUBTARGETFEATUREINFO_H
+
+#include "llvm/TableGen/Error.h"
+#include "llvm/TableGen/Record.h"
+
+#include <map>
+#include <string>
+#include <vector>
+
+namespace llvm {
+class Record;
+class RecordKeeper;
+
+struct SubtargetFeatureInfo;
+using SubtargetFeatureInfoMap = std::map<Record *, SubtargetFeatureInfo, LessRecordByID>;
+
+/// Helper class for storing information on a subtarget feature which
+/// participates in instruction matching.
+struct SubtargetFeatureInfo {
+  /// The predicate record for this feature.
+  Record *TheDef;
+
+  /// An unique index assigned to represent this feature.
+  uint64_t Index;
+
+  SubtargetFeatureInfo(Record *D, uint64_t Idx) : TheDef(D), Index(Idx) {}
+
+  /// The name of the enumerated constant identifying this feature.
+  std::string getEnumName() const {
+    return "Feature_" + TheDef->getName().str();
+  }
+
+  /// The name of the enumerated constant identifying the bitnumber for
+  /// this feature.
+  std::string getEnumBitName() const {
+    return "Feature_" + TheDef->getName().str() + "Bit";
+  }
+
+  bool mustRecomputePerFunction() const {
+    return TheDef->getValueAsBit("RecomputePerFunction");
+  }
+
+  void dump() const;
+  static std::vector<std::pair<Record *, SubtargetFeatureInfo>>
+  getAll(const RecordKeeper &Records);
+
+  /// Emit the subtarget feature flag definitions.
+  ///
+  /// This version emits the bit index for the feature and can therefore support
+  /// more than 64 feature bits.
+  static void
+  emitSubtargetFeatureBitEnumeration(SubtargetFeatureInfoMap &SubtargetFeatures,
+                                     raw_ostream &OS);
+
+  static void emitNameTable(SubtargetFeatureInfoMap &SubtargetFeatures,
+                            raw_ostream &OS);
+
+  /// Emit the function to compute the list of available features given a
+  /// subtarget.
+  ///
+  /// This version is used for subtarget features defined using Predicate<>
+  /// and supports more than 64 feature bits.
+  ///
+  /// \param TargetName The name of the target as used in class prefixes (e.g.
+  ///                   <TargetName>Subtarget)
+  /// \param ClassName  The name of the class (without the <Target> prefix)
+  ///                   that will contain the generated functions.
+  /// \param FuncName   The name of the function to emit.
+  /// \param SubtargetFeatures A map of TableGen records to the
+  ///                          SubtargetFeatureInfo equivalent.
+  /// \param ExtraParams Additional arguments to the generated function.
+  static void
+  emitComputeAvailableFeatures(StringRef TargetName, StringRef ClassName,
+                               StringRef FuncName,
+                               SubtargetFeatureInfoMap &SubtargetFeatures,
+                               raw_ostream &OS, StringRef ExtraParams = "");
+
+  /// Emit the function to compute the list of available features given a
+  /// subtarget.
+  ///
+  /// This version is used for subtarget features defined using
+  /// AssemblerPredicate<> and supports up to 64 feature bits.
+  ///
+  /// \param TargetName The name of the target as used in class prefixes (e.g.
+  ///                   <TargetName>Subtarget)
+  /// \param ClassName  The name of the class (without the <Target> prefix)
+  ///                   that will contain the generated functions.
+  /// \param FuncName   The name of the function to emit.
+  /// \param SubtargetFeatures A map of TableGen records to the
+  ///                          SubtargetFeatureInfo equivalent.
+  static void emitComputeAssemblerAvailableFeatures(
+      StringRef TargetName, StringRef ClassName, StringRef FuncName,
+      SubtargetFeatureInfoMap &SubtargetFeatures, raw_ostream &OS);
+};
+} // end namespace llvm
+
+#endif // LLVM_UTIL_TABLEGEN_SUBTARGETFEATUREINFO_H