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diff --git a/third_party/llvm-project/include/llvm/ADT/PointerIntPair.h b/third_party/llvm-project/include/llvm/ADT/PointerIntPair.h
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+++ b/third_party/llvm-project/include/llvm/ADT/PointerIntPair.h
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+//===- llvm/ADT/PointerIntPair.h - Pair for pointer and int -----*- 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 the PointerIntPair class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ADT_POINTERINTPAIR_H
+#define LLVM_ADT_POINTERINTPAIR_H
+
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/PointerLikeTypeTraits.h"
+#include "llvm/Support/type_traits.h"
+#include <cassert>
+#include <cstdint>
+#include <limits>
+
+namespace llvm {
+
+template <typename T> struct DenseMapInfo;
+template <typename PointerT, unsigned IntBits, typename PtrTraits>
+struct PointerIntPairInfo;
+
+/// PointerIntPair - This class implements a pair of a pointer and small
+/// integer.  It is designed to represent this in the space required by one
+/// pointer by bitmangling the integer into the low part of the pointer.  This
+/// can only be done for small integers: typically up to 3 bits, but it depends
+/// on the number of bits available according to PointerLikeTypeTraits for the
+/// type.
+///
+/// Note that PointerIntPair always puts the IntVal part in the highest bits
+/// possible.  For example, PointerIntPair<void*, 1, bool> will put the bit for
+/// the bool into bit #2, not bit #0, which allows the low two bits to be used
+/// for something else.  For example, this allows:
+///   PointerIntPair<PointerIntPair<void*, 1, bool>, 1, bool>
+/// ... and the two bools will land in different bits.
+template <typename PointerTy, unsigned IntBits, typename IntType = unsigned,
+          typename PtrTraits = PointerLikeTypeTraits<PointerTy>,
+          typename Info = PointerIntPairInfo<PointerTy, IntBits, PtrTraits>>
+class PointerIntPair {
+  // Used by MSVC visualizer and generally helpful for debugging/visualizing.
+  using InfoTy = Info;
+  intptr_t Value = 0;
+
+public:
+  constexpr PointerIntPair() = default;
+
+  PointerIntPair(PointerTy PtrVal, IntType IntVal) {
+    setPointerAndInt(PtrVal, IntVal);
+  }
+
+  explicit PointerIntPair(PointerTy PtrVal) { initWithPointer(PtrVal); }
+
+  PointerTy getPointer() const { return Info::getPointer(Value); }
+
+  IntType getInt() const { return (IntType)Info::getInt(Value); }
+
+  void setPointer(PointerTy PtrVal) LLVM_LVALUE_FUNCTION {
+    Value = Info::updatePointer(Value, PtrVal);
+  }
+
+  void setInt(IntType IntVal) LLVM_LVALUE_FUNCTION {
+    Value = Info::updateInt(Value, static_cast<intptr_t>(IntVal));
+  }
+
+  void initWithPointer(PointerTy PtrVal) LLVM_LVALUE_FUNCTION {
+    Value = Info::updatePointer(0, PtrVal);
+  }
+
+  void setPointerAndInt(PointerTy PtrVal, IntType IntVal) LLVM_LVALUE_FUNCTION {
+    Value = Info::updateInt(Info::updatePointer(0, PtrVal),
+                            static_cast<intptr_t>(IntVal));
+  }
+
+  PointerTy const *getAddrOfPointer() const {
+    return const_cast<PointerIntPair *>(this)->getAddrOfPointer();
+  }
+
+  PointerTy *getAddrOfPointer() {
+    assert(Value == reinterpret_cast<intptr_t>(getPointer()) &&
+           "Can only return the address if IntBits is cleared and "
+           "PtrTraits doesn't change the pointer");
+    return reinterpret_cast<PointerTy *>(&Value);
+  }
+
+  void *getOpaqueValue() const { return reinterpret_cast<void *>(Value); }
+
+  void setFromOpaqueValue(void *Val) LLVM_LVALUE_FUNCTION {
+    Value = reinterpret_cast<intptr_t>(Val);
+  }
+
+  static PointerIntPair getFromOpaqueValue(void *V) {
+    PointerIntPair P;
+    P.setFromOpaqueValue(V);
+    return P;
+  }
+
+  // Allow PointerIntPairs to be created from const void * if and only if the
+  // pointer type could be created from a const void *.
+  static PointerIntPair getFromOpaqueValue(const void *V) {
+    (void)PtrTraits::getFromVoidPointer(V);
+    return getFromOpaqueValue(const_cast<void *>(V));
+  }
+
+  bool operator==(const PointerIntPair &RHS) const {
+    return Value == RHS.Value;
+  }
+
+  bool operator!=(const PointerIntPair &RHS) const {
+    return Value != RHS.Value;
+  }
+
+  bool operator<(const PointerIntPair &RHS) const { return Value < RHS.Value; }
+  bool operator>(const PointerIntPair &RHS) const { return Value > RHS.Value; }
+
+  bool operator<=(const PointerIntPair &RHS) const {
+    return Value <= RHS.Value;
+  }
+
+  bool operator>=(const PointerIntPair &RHS) const {
+    return Value >= RHS.Value;
+  }
+};
+
+// Specialize is_trivially_copyable to avoid limitation of llvm::is_trivially_copyable
+// when compiled with gcc 4.9.
+template <typename PointerTy, unsigned IntBits, typename IntType,
+          typename PtrTraits,
+          typename Info>
+struct is_trivially_copyable<PointerIntPair<PointerTy, IntBits, IntType, PtrTraits, Info>> : std::true_type {
+#ifdef HAVE_STD_IS_TRIVIALLY_COPYABLE
+  static_assert(std::is_trivially_copyable<PointerIntPair<PointerTy, IntBits, IntType, PtrTraits, Info>>::value,
+                "inconsistent behavior between llvm:: and std:: implementation of is_trivially_copyable");
+#endif
+};
+
+
+template <typename PointerT, unsigned IntBits, typename PtrTraits>
+struct PointerIntPairInfo {
+  static_assert(PtrTraits::NumLowBitsAvailable <
+                    std::numeric_limits<uintptr_t>::digits,
+                "cannot use a pointer type that has all bits free");
+  static_assert(IntBits <= PtrTraits::NumLowBitsAvailable,
+                "PointerIntPair with integer size too large for pointer");
+  enum : uintptr_t {
+    /// PointerBitMask - The bits that come from the pointer.
+    PointerBitMask =
+        ~(uintptr_t)(((intptr_t)1 << PtrTraits::NumLowBitsAvailable) - 1),
+
+    /// IntShift - The number of low bits that we reserve for other uses, and
+    /// keep zero.
+    IntShift = (uintptr_t)PtrTraits::NumLowBitsAvailable - IntBits,
+
+    /// IntMask - This is the unshifted mask for valid bits of the int type.
+    IntMask = (uintptr_t)(((intptr_t)1 << IntBits) - 1),
+
+    // ShiftedIntMask - This is the bits for the integer shifted in place.
+    ShiftedIntMask = (uintptr_t)(IntMask << IntShift)
+  };
+
+  static PointerT getPointer(intptr_t Value) {
+    return PtrTraits::getFromVoidPointer(
+        reinterpret_cast<void *>(Value & PointerBitMask));
+  }
+
+  static intptr_t getInt(intptr_t Value) {
+    return (Value >> IntShift) & IntMask;
+  }
+
+  static intptr_t updatePointer(intptr_t OrigValue, PointerT Ptr) {
+    intptr_t PtrWord =
+        reinterpret_cast<intptr_t>(PtrTraits::getAsVoidPointer(Ptr));
+    assert((PtrWord & ~PointerBitMask) == 0 &&
+           "Pointer is not sufficiently aligned");
+    // Preserve all low bits, just update the pointer.
+    return PtrWord | (OrigValue & ~PointerBitMask);
+  }
+
+  static intptr_t updateInt(intptr_t OrigValue, intptr_t Int) {
+    intptr_t IntWord = static_cast<intptr_t>(Int);
+    assert((IntWord & ~IntMask) == 0 && "Integer too large for field");
+
+    // Preserve all bits other than the ones we are updating.
+    return (OrigValue & ~ShiftedIntMask) | IntWord << IntShift;
+  }
+};
+
+// Provide specialization of DenseMapInfo for PointerIntPair.
+template <typename PointerTy, unsigned IntBits, typename IntType>
+struct DenseMapInfo<PointerIntPair<PointerTy, IntBits, IntType>> {
+  using Ty = PointerIntPair<PointerTy, IntBits, IntType>;
+
+  static Ty getEmptyKey() {
+    uintptr_t Val = static_cast<uintptr_t>(-1);
+    Val <<= PointerLikeTypeTraits<Ty>::NumLowBitsAvailable;
+    return Ty::getFromOpaqueValue(reinterpret_cast<void *>(Val));
+  }
+
+  static Ty getTombstoneKey() {
+    uintptr_t Val = static_cast<uintptr_t>(-2);
+    Val <<= PointerLikeTypeTraits<PointerTy>::NumLowBitsAvailable;
+    return Ty::getFromOpaqueValue(reinterpret_cast<void *>(Val));
+  }
+
+  static unsigned getHashValue(Ty V) {
+    uintptr_t IV = reinterpret_cast<uintptr_t>(V.getOpaqueValue());
+    return unsigned(IV) ^ unsigned(IV >> 9);
+  }
+
+  static bool isEqual(const Ty &LHS, const Ty &RHS) { return LHS == RHS; }
+};
+
+// Teach SmallPtrSet that PointerIntPair is "basically a pointer".
+template <typename PointerTy, unsigned IntBits, typename IntType,
+          typename PtrTraits>
+struct PointerLikeTypeTraits<
+    PointerIntPair<PointerTy, IntBits, IntType, PtrTraits>> {
+  static inline void *
+  getAsVoidPointer(const PointerIntPair<PointerTy, IntBits, IntType> &P) {
+    return P.getOpaqueValue();
+  }
+
+  static inline PointerIntPair<PointerTy, IntBits, IntType>
+  getFromVoidPointer(void *P) {
+    return PointerIntPair<PointerTy, IntBits, IntType>::getFromOpaqueValue(P);
+  }
+
+  static inline PointerIntPair<PointerTy, IntBits, IntType>
+  getFromVoidPointer(const void *P) {
+    return PointerIntPair<PointerTy, IntBits, IntType>::getFromOpaqueValue(P);
+  }
+
+  enum { NumLowBitsAvailable = PtrTraits::NumLowBitsAvailable - IntBits };
+};
+
+} // end namespace llvm
+
+#endif // LLVM_ADT_POINTERINTPAIR_H