Index: clang/include/clang/StaticAnalyzer/Core/PathSensitive/APSIntType.h
===================================================================
--- clang/include/clang/StaticAnalyzer/Core/PathSensitive/APSIntType.h
+++ clang/include/clang/StaticAnalyzer/Core/PathSensitive/APSIntType.h
@@ -21,8 +21,8 @@
   bool IsUnsigned;
 
 public:
-  APSIntType(uint32_t Width, bool Unsigned)
-    : BitWidth(Width), IsUnsigned(Unsigned) {}
+  constexpr APSIntType(uint32_t Width, bool Unsigned)
+      : BitWidth(Width), IsUnsigned(Unsigned) {}
 
   /* implicit */ APSIntType(const llvm::APSInt &Value)
     : BitWidth(Value.getBitWidth()), IsUnsigned(Value.isUnsigned()) {}
Index: clang/include/clang/StaticAnalyzer/Core/PathSensitive/RangedConstraintManager.h
===================================================================
--- clang/include/clang/StaticAnalyzer/Core/PathSensitive/RangedConstraintManager.h
+++ clang/include/clang/StaticAnalyzer/Core/PathSensitive/RangedConstraintManager.h
@@ -236,6 +236,29 @@
     /// Complexity: O(N)
     ///             where N = size(What)
     RangeSet negate(RangeSet What);
+    /// Performs promotions, truncations and conversions of the given set.
+    ///
+    /// This function optimized for each of the six cast cases:
+    /// - noop
+    /// - conversion
+    /// - truncation
+    /// - truncation-conversion
+    /// - promotion
+    /// - promotion-conversion
+    ///
+    /// NOTE: This function is NOT self-inverse for truncations, because of
+    ///       the higher bits loss:
+    ///     - castTo(castTo(OrigRangeOfInt, char), int) != OrigRangeOfInt.
+    ///     - castTo(castTo(OrigRangeOfChar, int), char) == OrigRangeOfChar.
+    ///       But it is self-inverse for all the rest casts.
+    ///
+    /// Complexity:
+    ///     - Noop                               O(1);
+    ///     - Truncation                         O(N^2);
+    ///     - Another case                       O(N);
+    ///     where N = size(What)
+    RangeSet castTo(RangeSet What, APSIntType Ty);
+    RangeSet castTo(RangeSet What, QualType T);
 
     /// Return associated value factory.
     BasicValueFactory &getValueFactory() const { return ValueFactory; }
@@ -251,6 +274,17 @@
     /// containers are persistent (created via BasicValueFactory::getValue).
     ContainerType unite(const ContainerType &LHS, const ContainerType &RHS);
 
+    /// This is a helper function for `castTo` method. Implies not to be used
+    /// separately.
+    /// Performs a truncation case of a cast operation.
+    ContainerType truncateTo(RangeSet What, APSIntType Ty);
+
+    /// This is a helper function for `castTo` method. Implies not to be used
+    /// separately.
+    /// Performs a conversion case and a promotion-conversion case for signeds
+    /// of a cast operation.
+    ContainerType convertTo(RangeSet What, APSIntType Ty);
+
     // Many operations include producing new APSInt values and that's why
     // we need this factory.
     BasicValueFactory &ValueFactory;
@@ -302,6 +336,10 @@
   /// Complexity: O(1)
   const llvm::APSInt &getMaxValue() const;
 
+  bool isUnsigned() const;
+  uint32_t getBitWidth() const;
+  APSIntType getAPSIntType() const;
+
   /// Test whether the given point is contained by any of the ranges.
   ///
   /// Complexity: O(logN)
Index: clang/lib/StaticAnalyzer/Core/RangeConstraintManager.cpp
===================================================================
--- clang/lib/StaticAnalyzer/Core/RangeConstraintManager.cpp
+++ clang/lib/StaticAnalyzer/Core/RangeConstraintManager.cpp
@@ -296,6 +296,21 @@
   return std::prev(end())->To();
 }
 
+bool clang::ento::RangeSet::isUnsigned() const {
+  assert(!isEmpty());
+  return begin()->From().isUnsigned();
+}
+
+uint32_t clang::ento::RangeSet::getBitWidth() const {
+  assert(!isEmpty());
+  return begin()->From().getBitWidth();
+}
+
+APSIntType clang::ento::RangeSet::getAPSIntType() const {
+  assert(!isEmpty());
+  return APSIntType(begin()->From());
+}
+
 bool RangeSet::containsImpl(llvm::APSInt &Point) const {
   if (isEmpty() || !pin(Point))
     return false;
@@ -603,6 +618,163 @@
   return makePersistent(std::move(Result));
 }
 
+// Convert range set to the given integral type using truncation and promotion.
+// This works similar to APSIntType::apply function but for the range set.
+RangeSet RangeSet::Factory::castTo(RangeSet What, APSIntType Ty) {
+  // Set is empty or NOOP (aka cast to the same type).
+  if (What.isEmpty() || What.getAPSIntType() == Ty)
+    return What;
+
+  const bool IsConversion = What.isUnsigned() != Ty.isUnsigned();
+  const bool IsTruncation = What.getBitWidth() > Ty.getBitWidth();
+  const bool IsPromotion = What.getBitWidth() < Ty.getBitWidth();
+
+  if (IsTruncation)
+    return makePersistent(truncateTo(What, Ty));
+
+  if (IsConversion && (!IsPromotion || !What.isUnsigned()))
+    return makePersistent(convertTo(What, Ty));
+
+  // Promotion from unsigneds to signeds/unsigneds left.
+
+  using llvm::APInt;
+  using llvm::APSInt;
+  ContainerType Result;
+  // We definitely know the size of the result set.
+  Result.reserve(What.size());
+
+  // Each unsigned value fits every larger type without any changes,
+  // whether the larger type is signed or unsigned. So just promote and push
+  // back each range one by one.
+  for (const Range &R : What) {
+    // Get bounds of the given range.
+    APSInt FromInt = R.From();
+    APSInt ToInt = R.To();
+    // Cast the bounds.
+    Ty.apply(FromInt);
+    Ty.apply(ToInt);
+    Result.emplace_back(ValueFactory.getValue(FromInt),
+                        ValueFactory.getValue(ToInt));
+  }
+  return makePersistent(std::move(Result));
+}
+
+RangeSet RangeSet::Factory::castTo(RangeSet What, QualType T) {
+  assert(T->isIntegralOrEnumerationType() && "T shall be an integral type.");
+  return castTo(What, ValueFactory.getAPSIntType(T));
+}
+
+RangeSet::ContainerType RangeSet::Factory::truncateTo(RangeSet What,
+                                                      APSIntType Ty) {
+  using llvm::APInt;
+  using llvm::APSInt;
+  ContainerType Result;
+  ContainerType Dummy;
+  // CastRangeSize is an amount of all possible values of cast type.
+  // Example: `char` has 256 values; `short` has 65536 values.
+  // But in fact we use `amount of values` - 1, because
+  // we can't keep `amount of values of UINT64` inside uint64_t.
+  // E.g. 256 is an amount of all possible values of `char` and we can't keep
+  // it inside `char`.
+  // And it's OK, it's enough to do correct calculations.
+  uint64_t CastRangeSize = APInt::getMaxValue(Ty.getBitWidth()).getZExtValue();
+  for (const Range &R : What) {
+    // Get bounds of the given range.
+    APSInt FromInt = R.From();
+    APSInt ToInt = R.To();
+    // CurrentRangeSize is an amount of all possible values of the current
+    // range minus one.
+    uint64_t CurrentRangeSize = (ToInt - FromInt).getZExtValue();
+    // This is an optimization for specific case when we are enough to cover
+    // the whole range.
+    Dummy.clear();
+    if (CurrentRangeSize >= CastRangeSize) {
+      Dummy.emplace_back(ValueFactory.getMinValue(Ty),
+                         ValueFactory.getMaxValue(Ty));
+      Result = std::move(Dummy);
+      break;
+    }
+    // Cast the bounds.
+    Ty.apply(FromInt);
+    Ty.apply(ToInt);
+    const APSInt &PersistentFrom = ValueFactory.getValue(FromInt);
+    const APSInt &PersistentTo = ValueFactory.getValue(ToInt);
+    if (FromInt > ToInt) {
+      Dummy.emplace_back(ValueFactory.getMinValue(Ty), PersistentTo);
+      Dummy.emplace_back(PersistentFrom, ValueFactory.getMaxValue(Ty));
+    } else
+      Dummy.emplace_back(PersistentFrom, PersistentTo);
+    // Every range retrieved after truncation potentialy has garbage values.
+    // So, we have to unite every next range with the previouses.
+    Result = unite(Result, Dummy);
+  }
+
+  return Result;
+}
+
+RangeSet::ContainerType RangeSet::Factory::convertTo(RangeSet What,
+                                                     APSIntType Ty) {
+  using llvm::APInt;
+  using llvm::APSInt;
+  using Bounds = std::pair<const APSInt &, const APSInt &>;
+  ContainerType Result;
+  ContainerType Dummy;
+  // Divide the cast into two phases (presented as loops here).
+  // First phase(loop) works when casted values go in ascending order.
+  // E.g. char{1,3,5,127} -> uint{1,3,5,127}
+  // Interrupt the first phase and go to second one when casted values start
+  // go in descending order. That means that we crossed over the middle of
+  // the type value set (aka 0 for signeds and MAX/2+1 for unsigneds).
+  // For instance:
+  // 1: uchar{1,3,5,128,255} -> char{1,3,5,-128,-1}
+  //    Here we put {1,3,5} to one array and {-128, -1} to another
+  // 2: char{-128,-127,-1,0,1,2} -> uchar{128,129,255,0,1,3}
+  //    Here we put {128,129,255} to one array and {0,1,3} to another.
+  // After that we unite both arrays.
+  // NOTE: We don't just concatenate the arrays, because they may have
+  // adjacent ranges, e.g.:
+  // 1: char(-128, 127) -> uchar -> arr1(128, 255), arr2(0, 127) ->
+  //    unite -> uchar(0, 255)
+  // 2: uchar(0, 1)U(254, 255) -> char -> arr1(0, 1), arr2(-2, -1) ->
+  //    unite -> uchar(-2, 1)
+  auto CastRange = [Ty, &VF = ValueFactory](const Range &R) -> Bounds {
+    // Get bounds of the given range.
+    APSInt FromInt = R.From();
+    APSInt ToInt = R.To();
+    // Cast the bounds.
+    Ty.apply(FromInt);
+    Ty.apply(ToInt);
+    return {VF.getValue(FromInt), VF.getValue(ToInt)};
+  };
+  // Phase 1. Fill the first array.
+  APSInt LastFromInt = Ty.getMinValue();
+  const auto *It = What.begin();
+  const auto *E = What.end();
+  while (It != E) {
+    Bounds NewBounds = CastRange(*(It++));
+    // If values stop going acsending order, go to the second phase(loop).
+    if (NewBounds.first < LastFromInt) {
+      Dummy.emplace_back(NewBounds.first, NewBounds.second);
+      break;
+    }
+    if (NewBounds.first > NewBounds.second) {
+      Dummy.emplace_back(ValueFactory.getMinValue(Ty), NewBounds.second);
+      Result.emplace_back(NewBounds.first, ValueFactory.getMaxValue(Ty));
+    } else
+      Result.emplace_back(NewBounds.first, NewBounds.second);
+    LastFromInt = NewBounds.first;
+  }
+  // Phase 2. Fill the second array.
+  while (It != E) {
+    Bounds NewBounds = CastRange(*(It++));
+    Dummy.emplace_back(NewBounds.first, NewBounds.second);
+  }
+  // Unite both arrays.
+  Result = unite(Result, Dummy);
+
+  return Result;
+}
+
 RangeSet RangeSet::Factory::deletePoint(RangeSet From,
                                         const llvm::APSInt &Point) {
   if (!From.contains(Point))
Index: clang/unittests/StaticAnalyzer/RangeSetTest.cpp
===================================================================
--- clang/unittests/StaticAnalyzer/RangeSetTest.cpp
+++ clang/unittests/StaticAnalyzer/RangeSetTest.cpp
@@ -40,12 +40,18 @@
                                                       const Range &R) {
   return OS << toString(R);
 }
+LLVM_ATTRIBUTE_UNUSED static std::ostream &operator<<(std::ostream &OS,
+                                                      APSIntType Ty) {
+  return OS << (Ty.isUnsigned() ? "u" : "s") << Ty.getBitWidth();
+}
 
 } // namespace ento
 } // namespace clang
 
 namespace {
 
+template <class T> constexpr bool is_signed_v = std::is_signed<T>::value;
+
 template <typename T> struct TestValues {
   static constexpr T MIN = std::numeric_limits<T>::min();
   static constexpr T MAX = std::numeric_limits<T>::max();
@@ -53,7 +59,7 @@
   // which unary minus does not affect on,
   // e.g. int8/int32(0), uint8(128), uint32(2147483648).
   static constexpr T MID =
-      std::is_signed<T>::value ? 0 : ~(static_cast<T>(-1) / static_cast<T>(2));
+      is_signed_v<T> ? 0 : ~(static_cast<T>(-1) / static_cast<T>(2));
   static constexpr T A = MID - (MAX - MID) / 3 * 2;
   static constexpr T B = MID - (MAX - MID) / 3;
   static constexpr T C = -B;
@@ -61,6 +67,34 @@
 
   static_assert(MIN < A && A < B && B < MID && MID < C && C < D && D < MAX,
                 "Values shall be in an ascending order");
+  // Clear bits in low bytes by the given amount.
+  template <T Value, size_t Bytes>
+  static const T ClearLowBytes = static_cast<T>(static_cast<uint64_t>(Value)
+                                                << ((Bytes >= 8) ? 0 : Bytes) *
+                                                       8);
+
+  template <T Value, typename Base>
+  static constexpr T TruncZeroOf = ClearLowBytes<Value + 1, sizeof(Base)>;
+
+  // Random number with active bits in every byte. 0xAAAA'AAAA
+  static constexpr T XAAA = static_cast<T>(
+      0b10101010'10101010'10101010'10101010'10101010'10101010'10101010'10101010);
+  template <typename Base>
+  static constexpr T XAAATruncZeroOf = TruncZeroOf<XAAA, Base>; // 0xAAAA'AB00
+
+  // Random number with active bits in every byte. 0x5555'5555
+  static constexpr T X555 = static_cast<T>(
+      0b01010101'01010101'01010101'01010101'01010101'01010101'01010101'01010101);
+  template <typename Base>
+  static constexpr T X555TruncZeroOf = TruncZeroOf<X555, Base>; // 0x5555'5600
+
+  // Numbers for ranges with the same bits in the lowest byte.
+  // 0xAAAA'AA2A
+  static constexpr T FromA = ClearLowBytes<XAAA, sizeof(T) - 1> + 42;
+  static constexpr T ToA = FromA + 2; // 0xAAAA'AA2C
+  // 0x5555'552A
+  static constexpr T FromB = ClearLowBytes<X555, sizeof(T) - 1> + 42;
+  static constexpr T ToB = FromB + 2; // 0x5555'552C
 };
 
 template <typename BaseType> class RangeSetTest : public testing::Test {
@@ -74,21 +108,27 @@
   // End init block
 
   using Self = RangeSetTest<BaseType>;
-  using RawRange = std::pair<BaseType, BaseType>;
-  using RawRangeSet = std::initializer_list<RawRange>;
-
-  const llvm::APSInt &from(BaseType X) {
-    static llvm::APSInt Base{sizeof(BaseType) * 8,
-                             std::is_unsigned<BaseType>::value};
-    Base = X;
-    return BVF.getValue(Base);
+  template <typename T> using RawRangeT = std::pair<T, T>;
+  template <typename T>
+  using RawRangeSetT = std::initializer_list<RawRangeT<T>>;
+  using RawRange = RawRangeT<BaseType>;
+  using RawRangeSet = RawRangeSetT<BaseType>;
+  template <typename T>
+  static constexpr APSIntType APSIntTy = APSIntType(sizeof(T) * 8,
+                                                    !is_signed_v<T>);
+
+  template <typename T> const llvm::APSInt &from(T X) {
+    static llvm::APSInt Int = APSIntTy<T>.getZeroValue();
+    Int = X;
+    return BVF.getValue(Int);
   }
 
-  Range from(const RawRange &Init) {
+  template <typename T> Range from(const RawRangeT<T> &Init) {
     return Range(from(Init.first), from(Init.second));
   }
 
-  RangeSet from(const RawRangeSet &Init) {
+  template <typename T>
+  RangeSet from(RawRangeSetT<T> Init, APSIntType Ty = APSIntTy<BaseType>) {
     RangeSet RangeSet = F.getEmptySet();
     for (const auto &Raw : Init) {
       RangeSet = F.add(RangeSet, from(Raw));
@@ -211,9 +251,20 @@
                    RawRangeSet RawExpected) {
     wrap(&Self::checkDeleteImpl, Point, RawFrom, RawExpected);
   }
-};
 
-} // namespace
+  void checkCastToImpl(RangeSet What, APSIntType Ty, RangeSet Expected) {
+    RangeSet Result = F.castTo(What, Ty);
+    EXPECT_EQ(Result, Expected)
+        << "while casting " << toString(What) << " to " << Ty;
+  }
+
+  template <typename From, typename To>
+  void checkCastTo(RawRangeSetT<From> What, RawRangeSetT<To> Expected) {
+    static constexpr APSIntType FromTy = APSIntTy<From>;
+    static constexpr APSIntType ToTy = APSIntTy<To>;
+    this->checkCastToImpl(from(What, FromTy), ToTy, from(Expected, ToTy));
+  }
+};
 
 using IntTypes = ::testing::Types<int8_t, uint8_t, int16_t, uint16_t, int32_t,
                                   uint32_t, int64_t, uint64_t>;
@@ -591,3 +642,425 @@
                    {{MIN, MIN}, {B, MID}, {MID + 1, C}, {C + 4, D - 1}},
                    {{MIN, MIN}, {A, C}, {C + 2, D}, {MAX - 1, MAX}});
 }
+
+template <typename From, typename To> struct CastType {
+  using FromType = From;
+  using ToType = To;
+};
+
+template <typename Type>
+class RangeSetCastToNoopTest : public RangeSetTest<typename Type::FromType> {};
+template <typename Type>
+class RangeSetCastToPromotionTest
+    : public RangeSetTest<typename Type::FromType> {};
+template <typename Type>
+class RangeSetCastToTruncationTest
+    : public RangeSetTest<typename Type::FromType> {};
+template <typename Type>
+class RangeSetCastToConversionTest
+    : public RangeSetTest<typename Type::FromType> {};
+template <typename Type>
+class RangeSetCastToPromotionConversionTest
+    : public RangeSetTest<typename Type::FromType> {};
+template <typename Type>
+class RangeSetCastToTruncationConversionTest
+    : public RangeSetTest<typename Type::FromType> {};
+
+using NoopCastTypes =
+    ::testing::Types<CastType<int8_t, int8_t>, CastType<uint8_t, uint8_t>,
+                     CastType<int16_t, int16_t>, CastType<uint16_t, uint16_t>,
+                     CastType<int32_t, int32_t>, CastType<uint32_t, uint32_t>,
+                     CastType<int64_t, int64_t>, CastType<uint64_t, uint64_t>>;
+
+using PromotionCastTypes =
+    ::testing::Types<CastType<int8_t, int16_t>, CastType<int8_t, int32_t>,
+                     CastType<int8_t, int64_t>, CastType<uint8_t, uint16_t>,
+                     CastType<uint8_t, uint32_t>, CastType<uint8_t, uint64_t>,
+                     CastType<int16_t, int32_t>, CastType<int16_t, int64_t>,
+                     CastType<uint16_t, uint32_t>, CastType<uint16_t, uint64_t>,
+                     CastType<int32_t, int64_t>, CastType<uint32_t, uint64_t>>;
+
+using TruncationCastTypes =
+    ::testing::Types<CastType<int16_t, int8_t>, CastType<uint16_t, uint8_t>,
+                     CastType<int32_t, int16_t>, CastType<int32_t, int8_t>,
+                     CastType<uint32_t, uint16_t>, CastType<uint32_t, uint8_t>,
+                     CastType<int64_t, int32_t>, CastType<int64_t, int16_t>,
+                     CastType<int64_t, int8_t>, CastType<uint64_t, uint32_t>,
+                     CastType<uint64_t, uint16_t>, CastType<uint64_t, uint8_t>>;
+
+using ConversionCastTypes =
+    ::testing::Types<CastType<int8_t, uint8_t>, CastType<uint8_t, int8_t>,
+                     CastType<int16_t, uint16_t>, CastType<uint16_t, int16_t>,
+                     CastType<int32_t, uint32_t>, CastType<uint32_t, int32_t>,
+                     CastType<int64_t, uint64_t>, CastType<uint64_t, int64_t>>;
+
+using PromotionConversionCastTypes =
+    ::testing::Types<CastType<int8_t, uint16_t>, CastType<int8_t, uint32_t>,
+                     CastType<int8_t, uint64_t>, CastType<uint8_t, int16_t>,
+                     CastType<uint8_t, int32_t>, CastType<uint8_t, int64_t>,
+                     CastType<int16_t, uint32_t>, CastType<int16_t, uint64_t>,
+                     CastType<uint16_t, int32_t>, CastType<uint16_t, int64_t>,
+                     CastType<int32_t, uint64_t>, CastType<uint32_t, int64_t>>;
+
+using TruncationConversionCastTypes =
+    ::testing::Types<CastType<int16_t, uint8_t>, CastType<uint16_t, int8_t>,
+                     CastType<int32_t, uint16_t>, CastType<int32_t, uint8_t>,
+                     CastType<uint32_t, int16_t>, CastType<uint32_t, int8_t>,
+                     CastType<int64_t, uint32_t>, CastType<int64_t, uint16_t>,
+                     CastType<int64_t, uint8_t>, CastType<uint64_t, int32_t>,
+                     CastType<uint64_t, int16_t>, CastType<uint64_t, int8_t>>;
+
+TYPED_TEST_SUITE(RangeSetCastToNoopTest, NoopCastTypes);
+TYPED_TEST_SUITE(RangeSetCastToPromotionTest, PromotionCastTypes);
+TYPED_TEST_SUITE(RangeSetCastToTruncationTest, TruncationCastTypes);
+TYPED_TEST_SUITE(RangeSetCastToConversionTest, ConversionCastTypes);
+TYPED_TEST_SUITE(RangeSetCastToPromotionConversionTest,
+                 PromotionConversionCastTypes);
+TYPED_TEST_SUITE(RangeSetCastToTruncationConversionTest,
+                 TruncationConversionCastTypes);
+
+TYPED_TEST(RangeSetCastToNoopTest, RangeSetCastToNoopTest) {
+  // Just to reduce the verbosity.
+  using F = typename TypeParam::FromType; // From
+  using T = typename TypeParam::ToType;   // To
+
+  using TV = TestValues<T>;
+  constexpr auto MIN = TV::MIN;
+  constexpr auto MAX = TV::MAX;
+  constexpr auto MID = TV::MID;
+  constexpr auto B = TV::B;
+  constexpr auto C = TV::C;
+  // One point
+  this->template checkCastTo<F, T>({{MIN, MIN}}, {{MIN, MIN}});
+  this->template checkCastTo<F, T>({{MAX, MAX}}, {{MAX, MAX}});
+  this->template checkCastTo<F, T>({{MID, MID}}, {{MID, MID}});
+  this->template checkCastTo<F, T>({{B, B}}, {{B, B}});
+  this->template checkCastTo<F, T>({{C, C}}, {{C, C}});
+  // Two points
+  this->template checkCastTo<F, T>({{MIN, MIN}, {MAX, MAX}},
+                                   {{MIN, MIN}, {MAX, MAX}});
+  this->template checkCastTo<F, T>({{MIN, MIN}, {B, B}}, {{MIN, MIN}, {B, B}});
+  this->template checkCastTo<F, T>({{MID, MID}, {MAX, MAX}},
+                                   {{MID, MID}, {MAX, MAX}});
+  this->template checkCastTo<F, T>({{C, C}, {MAX, MAX}}, {{C, C}, {MAX, MAX}});
+  this->template checkCastTo<F, T>({{MID, MID}, {C, C}}, {{MID, MID}, {C, C}});
+  this->template checkCastTo<F, T>({{B, B}, {MID, MID}}, {{B, B}, {MID, MID}});
+  this->template checkCastTo<F, T>({{B, B}, {C, C}}, {{B, B}, {C, C}});
+  // One range
+  this->template checkCastTo<F, T>({{MIN, MAX}}, {{MIN, MAX}});
+  this->template checkCastTo<F, T>({{MIN, MID}}, {{MIN, MID}});
+  this->template checkCastTo<F, T>({{MID, MAX}}, {{MID, MAX}});
+  this->template checkCastTo<F, T>({{B, MAX}}, {{B, MAX}});
+  this->template checkCastTo<F, T>({{C, MAX}}, {{C, MAX}});
+  this->template checkCastTo<F, T>({{MIN, C}}, {{MIN, C}});
+  this->template checkCastTo<F, T>({{MIN, B}}, {{MIN, B}});
+  this->template checkCastTo<F, T>({{B, C}}, {{B, C}});
+  // Two ranges
+  this->template checkCastTo<F, T>({{MIN, B}, {C, MAX}}, {{MIN, B}, {C, MAX}});
+  this->template checkCastTo<F, T>({{B, MID}, {C, MAX}}, {{B, MID}, {C, MAX}});
+  this->template checkCastTo<F, T>({{MIN, B}, {MID, C}}, {{MIN, B}, {MID, C}});
+}
+
+TYPED_TEST(RangeSetCastToPromotionTest, Test) {
+  // Just to reduce the verbosity.
+  using F = typename TypeParam::FromType; // From
+  using T = typename TypeParam::ToType;   // To
+
+  using TV = TestValues<F>;
+  constexpr auto MIN = TV::MIN;
+  constexpr auto MAX = TV::MAX;
+  constexpr auto MID = TV::MID;
+  constexpr auto B = TV::B;
+  constexpr auto C = TV::C;
+  // One point
+  this->template checkCastTo<F, T>({{MIN, MIN}}, {{MIN, MIN}});
+  this->template checkCastTo<F, T>({{MAX, MAX}}, {{MAX, MAX}});
+  this->template checkCastTo<F, T>({{MID, MID}}, {{MID, MID}});
+  this->template checkCastTo<F, T>({{B, B}}, {{B, B}});
+  this->template checkCastTo<F, T>({{C, C}}, {{C, C}});
+  // Two points
+  this->template checkCastTo<F, T>({{MIN, MIN}, {MAX, MAX}},
+                                   {{MIN, MIN}, {MAX, MAX}});
+  this->template checkCastTo<F, T>({{MIN, MIN}, {B, B}}, {{MIN, MIN}, {B, B}});
+  this->template checkCastTo<F, T>({{MID, MID}, {MAX, MAX}},
+                                   {{MID, MID}, {MAX, MAX}});
+  this->template checkCastTo<F, T>({{C, C}, {MAX, MAX}}, {{C, C}, {MAX, MAX}});
+  this->template checkCastTo<F, T>({{MID, MID}, {C, C}}, {{MID, MID}, {C, C}});
+  this->template checkCastTo<F, T>({{B, B}, {MID, MID}}, {{B, B}, {MID, MID}});
+  this->template checkCastTo<F, T>({{B, B}, {C, C}}, {{B, B}, {C, C}});
+  // One range
+  this->template checkCastTo<F, T>({{MIN, MAX}}, {{MIN, MAX}});
+  this->template checkCastTo<F, T>({{MIN, MID}}, {{MIN, MID}});
+  this->template checkCastTo<F, T>({{MID, MAX}}, {{MID, MAX}});
+  this->template checkCastTo<F, T>({{B, MAX}}, {{B, MAX}});
+  this->template checkCastTo<F, T>({{C, MAX}}, {{C, MAX}});
+  this->template checkCastTo<F, T>({{MIN, C}}, {{MIN, C}});
+  this->template checkCastTo<F, T>({{MIN, B}}, {{MIN, B}});
+  this->template checkCastTo<F, T>({{B, C}}, {{B, C}});
+  // Two ranges
+  this->template checkCastTo<F, T>({{MIN, B}, {C, MAX}}, {{MIN, B}, {C, MAX}});
+  this->template checkCastTo<F, T>({{B, MID}, {C, MAX}}, {{B, MID}, {C, MAX}});
+  this->template checkCastTo<F, T>({{MIN, B}, {MID, C}}, {{MIN, B}, {MID, C}});
+}
+
+TYPED_TEST(RangeSetCastToTruncationTest, Test) {
+  // Just to reduce the verbosity.
+  using F = typename TypeParam::FromType; // From
+  using T = typename TypeParam::ToType;   // To
+
+  using TV = TestValues<F>;
+  constexpr auto MIN = TV::MIN;
+  constexpr auto MAX = TV::MAX;
+  constexpr auto MID = TV::MID;
+  constexpr auto B = TV::B;
+  constexpr auto C = TV::C;
+  // One point
+  this->template checkCastTo<F, T>({{MIN, MIN}}, {{MIN, MIN}});
+  this->template checkCastTo<F, T>({{MAX, MAX}}, {{MAX, MAX}});
+  this->template checkCastTo<F, T>({{MID, MID}}, {{MID, MID}});
+  this->template checkCastTo<F, T>({{B, B}}, {{B, B}});
+  this->template checkCastTo<F, T>({{C, C}}, {{C, C}});
+  // Two points
+  // Use `if constexpr` here.
+  if (is_signed_v<F>) {
+    this->template checkCastTo<F, T>({{MIN, MIN}, {MAX, MAX}}, {{MAX, MIN}});
+    this->template checkCastTo<F, T>({{MID, MID}, {MAX, MAX}}, {{MAX, MID}});
+  } else {
+    this->template checkCastTo<F, T>({{MIN, MIN}, {MAX, MAX}},
+                                     {{MIN, MIN}, {MAX, MAX}});
+    this->template checkCastTo<F, T>({{MID, MID}, {MAX, MAX}},
+                                     {{MID, MID}, {MAX, MAX}});
+  }
+  this->template checkCastTo<F, T>({{MIN, MIN}, {B, B}}, {{MIN, MIN}, {B, B}});
+  this->template checkCastTo<F, T>({{C, C}, {MAX, MAX}}, {{C, C}, {MAX, MAX}});
+  this->template checkCastTo<F, T>({{MID, MID}, {C, C}}, {{MID, MID}, {C, C}});
+  this->template checkCastTo<F, T>({{B, B}, {MID, MID}}, {{B, B}, {MID, MID}});
+  this->template checkCastTo<F, T>({{B, B}, {C, C}}, {{B, B}, {C, C}});
+  // One range
+  constexpr auto ToMIN = TestValues<T>::MIN;
+  constexpr auto ToMAX = TestValues<T>::MAX;
+  this->template checkCastTo<F, T>({{MIN, MAX}}, {{ToMIN, ToMAX}});
+  this->template checkCastTo<F, T>({{MIN, MID}}, {{ToMIN, ToMAX}});
+  this->template checkCastTo<F, T>({{MID, MAX}}, {{ToMIN, ToMAX}});
+  this->template checkCastTo<F, T>({{B, MAX}}, {{ToMIN, ToMAX}});
+  this->template checkCastTo<F, T>({{C, MAX}}, {{ToMIN, ToMAX}});
+  this->template checkCastTo<F, T>({{MIN, C}}, {{ToMIN, ToMAX}});
+  this->template checkCastTo<F, T>({{MIN, B}}, {{ToMIN, ToMAX}});
+  this->template checkCastTo<F, T>({{B, C}}, {{ToMIN, ToMAX}});
+  // Two ranges
+  this->template checkCastTo<F, T>({{MIN, B}, {C, MAX}}, {{ToMIN, ToMAX}});
+  this->template checkCastTo<F, T>({{B, MID}, {C, MAX}}, {{ToMIN, ToMAX}});
+  this->template checkCastTo<F, T>({{MIN, B}, {MID, C}}, {{ToMIN, ToMAX}});
+  constexpr auto XAAA = TV::XAAA;
+  constexpr auto X555 = TV::X555;
+  constexpr auto ZA = TV::template XAAATruncZeroOf<T>;
+  constexpr auto Z5 = TV::template X555TruncZeroOf<T>;
+  this->template checkCastTo<F, T>({{XAAA, ZA}, {X555, Z5}},
+                                   {{ToMIN, 0}, {X555, ToMAX}});
+  // Use `if constexpr` here.
+  if (is_signed_v<F>) {
+    // One range
+    this->template checkCastTo<F, T>({{XAAA, ZA}}, {{XAAA, 0}});
+    // Two ranges
+    this->template checkCastTo<F, T>({{XAAA, ZA}, {1, 42}}, {{XAAA, 42}});
+  } else {
+    // One range
+    this->template checkCastTo<F, T>({{XAAA, ZA}}, {{0, 0}, {XAAA, ToMAX}});
+    // Two ranges
+    this->template checkCastTo<F, T>({{1, 42}, {XAAA, ZA}},
+                                     {{0, 42}, {XAAA, ToMAX}});
+  }
+  constexpr auto FromA = TV::FromA;
+  constexpr auto ToA = TV::ToA;
+  constexpr auto FromB = TV::FromB;
+  constexpr auto ToB = TV::ToB;
+  this->template checkCastTo<F, T>({{FromA, ToA}, {FromB, ToB}},
+                                   {{FromA, ToA}});
+}
+
+TYPED_TEST(RangeSetCastToConversionTest, Test) {
+  // Just to reduce the verbosity.
+  using F = typename TypeParam::FromType; // From
+  using T = typename TypeParam::ToType;   // To
+
+  using TV = TestValues<F>;
+  constexpr auto MIN = TV::MIN;
+  constexpr auto MAX = TV::MAX;
+  constexpr auto MID = TV::MID;
+  constexpr auto B = TV::B;
+  constexpr auto C = TV::C;
+  // One point
+  this->template checkCastTo<F, T>({{MIN, MIN}}, {{MIN, MIN}});
+  this->template checkCastTo<F, T>({{MAX, MAX}}, {{MAX, MAX}});
+  this->template checkCastTo<F, T>({{MID, MID}}, {{MID, MID}});
+  this->template checkCastTo<F, T>({{B, B}}, {{B, B}});
+  this->template checkCastTo<F, T>({{C, C}}, {{C, C}});
+  // Two points
+  this->template checkCastTo<F, T>({{MIN, MIN}, {MAX, MAX}}, {{MAX, MIN}});
+  this->template checkCastTo<F, T>({{MID, MID}, {MAX, MAX}},
+                                   {{MID, MID}, {MAX, MAX}});
+  this->template checkCastTo<F, T>({{MIN, MIN}, {B, B}}, {{MIN, MIN}, {B, B}});
+  this->template checkCastTo<F, T>({{C, C}, {MAX, MAX}}, {{C, C}, {MAX, MAX}});
+  this->template checkCastTo<F, T>({{MID, MID}, {C, C}}, {{MID, MID}, {C, C}});
+  this->template checkCastTo<F, T>({{B, B}, {MID, MID}}, {{B, B}, {MID, MID}});
+  this->template checkCastTo<F, T>({{B, B}, {C, C}}, {{B, B}, {C, C}});
+  // One range
+  constexpr auto ToMIN = TestValues<T>::MIN;
+  constexpr auto ToMAX = TestValues<T>::MAX;
+  this->template checkCastTo<F, T>({{MIN, MAX}}, {{ToMIN, ToMAX}});
+  this->template checkCastTo<F, T>({{MIN, MID}},
+                                   {{ToMIN, ToMIN}, {MIN, ToMAX}});
+  this->template checkCastTo<F, T>({{MID, MAX}}, {{MID, MAX}});
+  this->template checkCastTo<F, T>({{B, MAX}}, {{ToMIN, MAX}, {B, ToMAX}});
+  this->template checkCastTo<F, T>({{C, MAX}}, {{C, MAX}});
+  this->template checkCastTo<F, T>({{MIN, C}}, {{ToMIN, C}, {MIN, ToMAX}});
+  this->template checkCastTo<F, T>({{MIN, B}}, {{MIN, B}});
+  this->template checkCastTo<F, T>({{B, C}}, {{ToMIN, C}, {B, ToMAX}});
+  // Two ranges
+  this->template checkCastTo<F, T>({{MIN, B}, {C, MAX}}, {{C, B}});
+  this->template checkCastTo<F, T>({{B, MID}, {C, MAX}},
+                                   {{MID, MID}, {C, MAX}, {B, ToMAX}});
+  this->template checkCastTo<F, T>({{MIN, B}, {MID, C}}, {{MID, C}, {MIN, B}});
+}
+
+TYPED_TEST(RangeSetCastToPromotionConversionTest, Test) {
+  // Just to reduce the verbosity.
+  using F = typename TypeParam::FromType; // From
+  using T = typename TypeParam::ToType;   // To
+
+  using TV = TestValues<F>;
+  constexpr auto MIN = TV::MIN;
+  constexpr auto MAX = TV::MAX;
+  constexpr auto MID = TV::MID;
+  constexpr auto B = TV::B;
+  constexpr auto C = TV::C;
+  // One point
+  this->template checkCastTo<F, T>({{MIN, MIN}}, {{MIN, MIN}});
+  this->template checkCastTo<F, T>({{MAX, MAX}}, {{MAX, MAX}});
+  this->template checkCastTo<F, T>({{MID, MID}}, {{MID, MID}});
+  this->template checkCastTo<F, T>({{B, B}}, {{B, B}});
+  this->template checkCastTo<F, T>({{C, C}}, {{C, C}});
+  // Two points
+  this->template checkCastTo<F, T>({{MIN, MIN}, {MAX, MAX}},
+                                   {{MAX, MAX}, {MIN, MIN}});
+  this->template checkCastTo<F, T>({{MIN, MIN}, {B, B}}, {{MIN, MIN}, {B, B}});
+  this->template checkCastTo<F, T>({{MID, MID}, {MAX, MAX}},
+                                   {{MID, MID}, {MAX, MAX}});
+  this->template checkCastTo<F, T>({{C, C}, {MAX, MAX}}, {{C, C}, {MAX, MAX}});
+  this->template checkCastTo<F, T>({{MID, MID}, {C, C}}, {{MID, MID}, {C, C}});
+  this->template checkCastTo<F, T>({{B, B}, {MID, MID}}, {{B, B}, {MID, MID}});
+  this->template checkCastTo<F, T>({{B, B}, {C, C}}, {{B, B}, {C, C}});
+
+  // Use `if constexpr` here.
+  if (is_signed_v<F>) {
+    // One range
+    this->template checkCastTo<F, T>({{MIN, MAX}}, {{0, MAX}, {MIN, -1}});
+    this->template checkCastTo<F, T>({{MIN, MID}}, {{0, 0}, {MIN, -1}});
+    this->template checkCastTo<F, T>({{MID, MAX}}, {{0, MAX}});
+    this->template checkCastTo<F, T>({{B, MAX}}, {{0, MAX}, {B, -1}});
+    this->template checkCastTo<F, T>({{C, MAX}}, {{C, MAX}});
+    this->template checkCastTo<F, T>({{MIN, C}}, {{0, C}, {MIN, -1}});
+    this->template checkCastTo<F, T>({{MIN, B}}, {{MIN, B}});
+    this->template checkCastTo<F, T>({{B, C}}, {{0, C}, {B, -1}});
+    // Two ranges
+    this->template checkCastTo<F, T>({{MIN, B}, {C, MAX}},
+                                     {{C, MAX}, {MIN, B}});
+    this->template checkCastTo<F, T>({{B, MID}, {C, MAX}},
+                                     {{0, 0}, {C, MAX}, {B, -1}});
+    this->template checkCastTo<F, T>({{MIN, B}, {MID, C}}, {{0, C}, {MIN, B}});
+  } else {
+    // One range
+    this->template checkCastTo<F, T>({{MIN, MAX}}, {{MIN, MAX}});
+    this->template checkCastTo<F, T>({{MIN, MID}}, {{MIN, MID}});
+    this->template checkCastTo<F, T>({{MID, MAX}}, {{MID, MAX}});
+    this->template checkCastTo<F, T>({{B, MAX}}, {{B, MAX}});
+    this->template checkCastTo<F, T>({{C, MAX}}, {{C, MAX}});
+    this->template checkCastTo<F, T>({{MIN, C}}, {{MIN, C}});
+    this->template checkCastTo<F, T>({{MIN, B}}, {{MIN, B}});
+    this->template checkCastTo<F, T>({{B, C}}, {{B, C}});
+    // Two ranges
+    this->template checkCastTo<F, T>({{MIN, B}, {C, MAX}},
+                                     {{MIN, B}, {C, MAX}});
+    this->template checkCastTo<F, T>({{B, MID}, {C, MAX}},
+                                     {{B, MID}, {C, MAX}});
+    this->template checkCastTo<F, T>({{MIN, B}, {MID, C}},
+                                     {{MIN, B}, {MID, C}});
+  }
+}
+
+TYPED_TEST(RangeSetCastToTruncationConversionTest, Test) {
+  // Just to reduce the verbosity.
+  using F = typename TypeParam::FromType; // From
+  using T = typename TypeParam::ToType;   // To
+
+  using TV = TestValues<F>;
+  constexpr auto MIN = TV::MIN;
+  constexpr auto MAX = TV::MAX;
+  constexpr auto MID = TV::MID;
+  constexpr auto B = TV::B;
+  constexpr auto C = TV::C;
+  // One point
+  this->template checkCastTo<F, T>({{MIN, MIN}}, {{MIN, MIN}});
+  this->template checkCastTo<F, T>({{MAX, MAX}}, {{MAX, MAX}});
+  this->template checkCastTo<F, T>({{MID, MID}}, {{MID, MID}});
+  this->template checkCastTo<F, T>({{B, B}}, {{B, B}});
+  this->template checkCastTo<F, T>({{C, C}}, {{C, C}});
+  // Two points
+  // Use `if constexpr` here.
+  if (is_signed_v<F>) {
+    this->template checkCastTo<F, T>({{MIN, MIN}, {MAX, MAX}},
+                                     {{MIN, MIN}, {MAX, MAX}});
+    this->template checkCastTo<F, T>({{MID, MID}, {MAX, MAX}},
+                                     {{MID, MID}, {MAX, MAX}});
+  } else {
+    this->template checkCastTo<F, T>({{MIN, MIN}, {MAX, MAX}}, {{MAX, MIN}});
+    this->template checkCastTo<F, T>({{MID, MID}, {MAX, MAX}}, {{MAX, MIN}});
+  }
+  this->template checkCastTo<F, T>({{MIN, MIN}, {B, B}}, {{MIN, MIN}, {B, B}});
+  this->template checkCastTo<F, T>({{C, C}, {MAX, MAX}}, {{C, C}, {MAX, MAX}});
+  this->template checkCastTo<F, T>({{MID, MID}, {C, C}}, {{MID, MID}, {C, C}});
+  this->template checkCastTo<F, T>({{B, B}, {MID, MID}}, {{B, B}, {MID, MID}});
+  this->template checkCastTo<F, T>({{B, B}, {C, C}}, {{B, B}, {C, C}});
+  // One range
+  constexpr auto ToMIN = TestValues<T>::MIN;
+  constexpr auto ToMAX = TestValues<T>::MAX;
+  this->template checkCastTo<F, T>({{MIN, MAX}}, {{ToMIN, ToMAX}});
+  this->template checkCastTo<F, T>({{MIN, MID}}, {{ToMIN, ToMAX}});
+  this->template checkCastTo<F, T>({{MID, MAX}}, {{ToMIN, ToMAX}});
+  this->template checkCastTo<F, T>({{B, MAX}}, {{ToMIN, ToMAX}});
+  this->template checkCastTo<F, T>({{C, MAX}}, {{ToMIN, ToMAX}});
+  this->template checkCastTo<F, T>({{MIN, C}}, {{ToMIN, ToMAX}});
+  this->template checkCastTo<F, T>({{MIN, B}}, {{ToMIN, ToMAX}});
+  this->template checkCastTo<F, T>({{B, C}}, {{ToMIN, ToMAX}});
+  // Two ranges
+  this->template checkCastTo<F, T>({{MIN, B}, {C, MAX}}, {{ToMIN, ToMAX}});
+  this->template checkCastTo<F, T>({{B, MID}, {C, MAX}}, {{ToMIN, ToMAX}});
+  this->template checkCastTo<F, T>({{MIN, B}, {MID, C}}, {{ToMIN, ToMAX}});
+  constexpr auto XAAA = TV::XAAA;
+  constexpr auto X555 = TV::X555;
+  constexpr auto ZA = TV::template XAAATruncZeroOf<T>;
+  constexpr auto Z5 = TV::template X555TruncZeroOf<T>;
+  this->template checkCastTo<F, T>({{XAAA, ZA}, {X555, Z5}},
+                                   {{ToMIN, 0}, {X555, ToMAX}});
+  // Use `if constexpr` here.
+  if (is_signed_v<F>) {
+    // One range
+    this->template checkCastTo<F, T>({{XAAA, ZA}}, {{0, 0}, {XAAA, ToMAX}});
+    // Two ranges
+    this->template checkCastTo<F, T>({{XAAA, ZA}, {1, 42}},
+                                     {{0, 42}, {XAAA, ToMAX}});
+  } else {
+    // One range
+    this->template checkCastTo<F, T>({{XAAA, ZA}}, {{XAAA, 0}});
+    // Two ranges
+    this->template checkCastTo<F, T>({{1, 42}, {XAAA, ZA}}, {{XAAA, 42}});
+  }
+  constexpr auto FromA = TV::FromA;
+  constexpr auto ToA = TV::ToA;
+  constexpr auto FromB = TV::FromB;
+  constexpr auto ToB = TV::ToB;
+  this->template checkCastTo<F, T>({{FromA, ToA}, {FromB, ToB}},
+                                   {{FromA, ToA}});
+}
+
+} // namespace