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diff --git a/llvm/utils/TableGen/CodeGenIntrinsics.h b/llvm/utils/TableGen/CodeGenIntrinsics.h
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+++ b/llvm/utils/TableGen/CodeGenIntrinsics.h
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+//===- CodeGenIntrinsic.h - Intrinsic Class Wrapper ------------*- 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 defines a wrapper class for the 'Intrinsic' TableGen class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_UTILS_TABLEGEN_CODEGENINTRINSICS_H
+#define LLVM_UTILS_TABLEGEN_CODEGENINTRINSICS_H
+
+#include "SDNodeProperties.h"
+#include "llvm/Support/MachineValueType.h"
+#include <string>
+#include <vector>
+
+namespace llvm {
+class Record;
+class RecordKeeper;
+class CodeGenTarget;
+
+struct CodeGenIntrinsic {
+  Record *TheDef;             // The actual record defining this intrinsic.
+  std::string Name;           // The name of the LLVM function "llvm.bswap.i32"
+  std::string EnumName;       // The name of the enum "bswap_i32"
+  std::string GCCBuiltinName; // Name of the corresponding GCC builtin, or "".
+  std::string MSBuiltinName;  // Name of the corresponding MS builtin, or "".
+  std::string TargetPrefix;   // Target prefix, e.g. "ppc" for t-s intrinsics.
+
+  /// This structure holds the return values and parameter values of an
+  /// intrinsic. If the number of return values is > 1, then the intrinsic
+  /// implicitly returns a first-class aggregate. The numbering of the types
+  /// starts at 0 with the first return value and continues from there through
+  /// the parameter list. This is useful for "matching" types.
+  struct IntrinsicSignature {
+    /// The MVT::SimpleValueType for each return type. Note that this list is
+    /// only populated when in the context of a target .td file. When building
+    /// Intrinsics.td, this isn't available, because we don't know the target
+    /// pointer size.
+    std::vector<MVT::SimpleValueType> RetVTs;
+
+    /// The records for each return type.
+    std::vector<Record *> RetTypeDefs;
+
+    /// The MVT::SimpleValueType for each parameter type. Note that this list is
+    /// only populated when in the context of a target .td file.  When building
+    /// Intrinsics.td, this isn't available, because we don't know the target
+    /// pointer size.
+    std::vector<MVT::SimpleValueType> ParamVTs;
+
+    /// The records for each parameter type.
+    std::vector<Record *> ParamTypeDefs;
+  };
+
+  IntrinsicSignature IS;
+
+  /// Bit flags describing the type (ref/mod) and location of memory
+  /// accesses that may be performed by the intrinsics. Analogous to
+  /// \c FunctionModRefBehaviour.
+  enum ModRefBits {
+    /// The intrinsic may access memory that is otherwise inaccessible via
+    /// LLVM IR.
+    MR_InaccessibleMem = 1,
+
+    /// The intrinsic may access memory through pointer arguments.
+    /// LLVM IR.
+    MR_ArgMem = 2,
+
+    /// The intrinsic may access memory anywhere, i.e. it is not restricted
+    /// to access through pointer arguments.
+    MR_Anywhere = 4 | MR_ArgMem | MR_InaccessibleMem,
+
+    /// The intrinsic may read memory.
+    MR_Ref = 8,
+
+    /// The intrinsic may write memory.
+    MR_Mod = 16,
+
+    /// The intrinsic may both read and write memory.
+    MR_ModRef = MR_Ref | MR_Mod,
+  };
+
+  /// Memory mod/ref behavior of this intrinsic, corresponding to intrinsic
+  /// properties (IntrReadMem, IntrArgMemOnly, etc.).
+  enum ModRefBehavior {
+    NoMem = 0,
+    ReadArgMem = MR_Ref | MR_ArgMem,
+    ReadInaccessibleMem = MR_Ref | MR_InaccessibleMem,
+    ReadInaccessibleMemOrArgMem = MR_Ref | MR_ArgMem | MR_InaccessibleMem,
+    ReadMem = MR_Ref | MR_Anywhere,
+    WriteArgMem = MR_Mod | MR_ArgMem,
+    WriteInaccessibleMem = MR_Mod | MR_InaccessibleMem,
+    WriteInaccessibleMemOrArgMem = MR_Mod | MR_ArgMem | MR_InaccessibleMem,
+    WriteMem = MR_Mod | MR_Anywhere,
+    ReadWriteArgMem = MR_ModRef | MR_ArgMem,
+    ReadWriteInaccessibleMem = MR_ModRef | MR_InaccessibleMem,
+    ReadWriteInaccessibleMemOrArgMem = MR_ModRef | MR_ArgMem |
+                                       MR_InaccessibleMem,
+    ReadWriteMem = MR_ModRef | MR_Anywhere,
+  };
+  ModRefBehavior ModRef;
+
+  /// SDPatternOperator Properties applied to the intrinsic.
+  unsigned Properties;
+
+  /// This is set to true if the intrinsic is overloaded by its argument
+  /// types.
+  bool isOverloaded;
+
+  /// True if the intrinsic is commutative.
+  bool isCommutative;
+
+  /// True if the intrinsic can throw.
+  bool canThrow;
+
+  /// True if the intrinsic is marked as noduplicate.
+  bool isNoDuplicate;
+
+  /// True if the intrinsic is no-return.
+  bool isNoReturn;
+
+  /// True if the intrinsic is will-return.
+  bool isWillReturn;
+
+  /// True if the intrinsic is cold.
+  bool isCold;
+
+  /// True if the intrinsic is marked as convergent.
+  bool isConvergent;
+
+  /// True if the intrinsic has side effects that aren't captured by any
+  /// of the other flags.
+  bool hasSideEffects;
+
+  // True if the intrinsic is marked as speculatable.
+  bool isSpeculatable;
+
+  enum ArgAttribute {
+    NoCapture,
+    NoAlias,
+    Returned,
+    ReadOnly,
+    WriteOnly,
+    ReadNone,
+    ImmArg
+  };
+
+  std::vector<std::pair<unsigned, ArgAttribute>> ArgumentAttributes;
+
+  bool hasProperty(enum SDNP Prop) const {
+    return Properties & (1 << Prop);
+  }
+
+  /// Returns true if the parameter at \p ParamIdx is a pointer type. Returns
+  /// false if the parameter is not a pointer, or \p ParamIdx is greater than
+  /// the size of \p IS.ParamVTs.
+  ///
+  /// Note that this requires that \p IS.ParamVTs is available.
+  bool isParamAPointer(unsigned ParamIdx) const;
+
+  CodeGenIntrinsic(Record *R);
+};
+
+class CodeGenIntrinsicTable {
+  std::vector<CodeGenIntrinsic> Intrinsics;
+
+public:
+  struct TargetSet {
+    std::string Name;
+    size_t Offset;
+    size_t Count;
+  };
+  std::vector<TargetSet> Targets;
+
+  explicit CodeGenIntrinsicTable(const RecordKeeper &RC, bool TargetOnly);
+  CodeGenIntrinsicTable() = default;
+
+  bool empty() const { return Intrinsics.empty(); }
+  size_t size() const { return Intrinsics.size(); }
+  CodeGenIntrinsic &operator[](size_t Pos) { return Intrinsics[Pos]; }
+  const CodeGenIntrinsic &operator[](size_t Pos) const {
+    return Intrinsics[Pos];
+  }
+};
+}
+
+#endif