types.cc

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// Copyright 2022 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#include "src/compiler/turboshaft/types.h"
 
#include <optional>
#include <sstream>
#include <string_view>
 
#include "src/base/logging.h"
#include "src/compiler/turboshaft/type-parser.h"
#include "src/heap/factory.h"
#include "src/objects/turboshaft-types-inl.h"
 
namespace v8::internal::compiler::turboshaft {
 
namespace {
 
std::pair<uint32_t, uint32_t> uint64_to_high_low(uint64_t value) {
  return {static_cast<uint32_t>(value >> 32), static_cast<uint32_t>(value)};
}
 
}  // namespace
 
bool Type::Equals(const Type& other) const {
  DCHECK(!IsInvalid());
  DCHECK(!other.IsInvalid());
 
  if (kind_ != other.kind_) return false;
  switch (kind_) {
    case Kind::kInvalid:
      UNREACHABLE();
    case Kind::kNone:
      return true;
    case Kind::kWord32:
      return AsWord32().Equals(other.AsWord32());
    case Kind::kWord64:
      return AsWord64().Equals(other.AsWord64());
    case Kind::kFloat32:
      return AsFloat32().Equals(other.AsFloat32());
    case Kind::kFloat64:
      return AsFloat64().Equals(other.AsFloat64());
    case Kind::kTuple:
      return AsTuple().Equals(other.AsTuple());
    case Kind::kAny:
      return true;
  }
}
 
bool Type::IsSubtypeOf(const Type& other) const {
  DCHECK(!IsInvalid());
  DCHECK(!other.IsInvalid());
 
  if (other.IsAny() || IsNone()) return true;
  if (kind_ != other.kind_) return false;
 
  switch (kind_) {
    case Kind::kInvalid:
    case Kind::kNone:
      UNREACHABLE();
    case Kind::kWord32:
      return AsWord32().IsSubtypeOf(other.AsWord32());
    case Kind::kWord64:
      return AsWord64().IsSubtypeOf(other.AsWord64());
    case Kind::kFloat32:
      return AsFloat32().IsSubtypeOf(other.AsFloat32());
    case Kind::kFloat64:
      return AsFloat64().IsSubtypeOf(other.AsFloat64());
    case Kind::kTuple:
      return AsTuple().IsSubtypeOf(other.AsTuple());
    case Kind::kAny:
      UNREACHABLE();
  }
}
 
void Type::PrintTo(std::ostream& stream) const {
  switch (kind_) {
    case Kind::kInvalid:
      UNREACHABLE();
    case Kind::kNone:
      stream << "None";
      break;
    case Kind::kWord32: {
      AsWord32().PrintTo(stream);
      break;
    }
    case Kind::kWord64: {
      AsWord64().PrintTo(stream);
      break;
    }
    case Kind::kFloat32: {
      AsFloat32().PrintTo(stream);
      break;
    }
    case Kind::kFloat64: {
      AsFloat64().PrintTo(stream);
      break;
    }
    case Kind::kTuple: {
      AsTuple().PrintTo(stream);
      break;
    }
    case Kind::kAny: {
      stream << "Any";
      break;
    }
  }
}
 
void Type::Print() const {
  StdoutStream os;
  PrintTo(os);
  os << '\n';
}
 
// static
Type Type::LeastUpperBound(const Type& lhs, const Type& rhs, Zone* zone) {
  if (lhs.IsAny() || rhs.IsAny()) return Type::Any();
  if (lhs.IsNone()) return rhs;
  if (rhs.IsNone()) return lhs;
 
  // TODO(nicohartmann@): We might use more precise types here but currently
  // there is not much benefit in that.
  if (lhs.kind() != rhs.kind()) return Type::Any();
 
  switch (lhs.kind()) {
    case Type::Kind::kInvalid:
    case Type::Kind::kNone:
    case Type::Kind::kAny:
      UNREACHABLE();
    case Type::Kind::kWord32:
      return Word32Type::LeastUpperBound(lhs.AsWord32(), rhs.AsWord32(), zone);
    case Type::Kind::kWord64:
      return Word64Type::LeastUpperBound(lhs.AsWord64(), rhs.AsWord64(), zone);
    case Type::Kind::kFloat32:
      return Float32Type::LeastUpperBound(lhs.AsFloat32(), rhs.AsFloat32(),
                                          zone);
    case Type::Kind::kFloat64:
      return Float64Type::LeastUpperBound(lhs.AsFloat64(), rhs.AsFloat64(),
                                          zone);
    case Type::Kind::kTuple:
      return TupleType::LeastUpperBound(lhs.AsTuple(), rhs.AsTuple(), zone);
  }
}
 
std::optional<Type> Type::ParseFromString(const std::string_view& str,
                                          Zone* zone) {
  TypeParser parser(str, zone);
  return parser.Parse();
}
 
Handle<TurboshaftType> Type::AllocateOnHeap(Factory* factory) const {
  DCHECK_NOT_NULL(factory);
  switch (kind_) {
    case Kind::kInvalid:
      UNREACHABLE();
    case Kind::kNone:
      UNIMPLEMENTED();
    case Kind::kWord32:
      return AsWord32().AllocateOnHeap(factory);
    case Kind::kWord64:
      return AsWord64().AllocateOnHeap(factory);
    case Kind::kFloat32:
      return AsFloat32().AllocateOnHeap(factory);
    case Kind::kFloat64:
      return AsFloat64().AllocateOnHeap(factory);
    case Kind::kTuple:
      UNIMPLEMENTED();
    case Kind::kAny:
      UNIMPLEMENTED();
  }
}
 
template <size_t Bits>
bool WordType<Bits>::Contains(word_t value) const {
  switch (sub_kind()) {
    case SubKind::kRange: {
      if (is_wrapping()) return range_to() >= value || range_from() <= value;
      return range_from() <= value && value <= range_to();
    }
    case SubKind::kSet: {
      for (int i = 0; i < set_size(); ++i) {
        if (set_element(i) == value) return true;
      }
      return false;
    }
  }
}
 
template <size_t Bits>
bool WordType<Bits>::Equals(const WordType<Bits>& other) const {
  if (sub_kind() != other.sub_kind()) return false;
  switch (sub_kind()) {
    case SubKind::kRange:
      return (range_from() == other.range_from() &&
              range_to() == other.range_to()) ||
             (is_any() && other.is_any());
    case SubKind::kSet: {
      if (set_size() != other.set_size()) return false;
      for (int i = 0; i < set_size(); ++i) {
        if (set_element(i) != other.set_element(i)) return false;
      }
      return true;
    }
  }
}
 
template <size_t Bits>
bool WordType<Bits>::IsSubtypeOf(const WordType<Bits>& other) const {
  if (other.is_any()) return true;
  switch (sub_kind()) {
    case SubKind::kRange: {
      if (other.is_set()) return false;
      DCHECK(other.is_range());
      if (is_wrapping() == other.is_wrapping()) {
        return range_from() >= other.range_from() &&
               range_to() <= other.range_to();
      }
      return !is_wrapping() && (range_to() <= other.range_to() ||
                                range_from() >= other.range_from());
    }
    case SubKind::kSet: {
      if (other.is_set() && set_size() > other.set_size()) return false;
      for (int i = 0; i < set_size(); ++i) {
        if (!other.Contains(set_element(i))) return false;
      }
      return true;
    }
  }
}
 
template <size_t Bits, typename word_t = typename WordType<Bits>::word_t>
WordType<Bits> LeastUpperBoundFromRanges(word_t l_from, word_t l_to,
                                         word_t r_from, word_t r_to,
                                         Zone* zone) {
  const bool lhs_wrapping = l_to < l_from;
  const bool rhs_wrapping = r_to < r_from;
  // Case 1: Both ranges non-wrapping
  // lhs ---|XXX|--  --|XXX|---  -|XXXXXX|-  ---|XX|--- -|XX|------
  // rhs -|XXX|----  ----|XXX|-  ---|XX|---  -|XXXXXX|- ------|XX|-
  // ==> -|XXXXX|--  --|XXXXX|-  -|XXXXXX|-  -|XXXXXX|- -|XXXXXXX|-
  if (!lhs_wrapping && !rhs_wrapping) {
    return WordType<Bits>::Range(std::min(l_from, r_from), std::max(l_to, r_to),
                                 zone);
  }
  // Case 2: Both ranges wrapping
  // lhs XXX|----|XXX   X|---|XXXXXX   XXXXXX|---|X   XX|--|XXXXXX
  // rhs X|---|XXXXXX   XXX|----|XXX   XX|--|XXXXXX   XXXXXX|--|XX
  // ==> XXX|-|XXXXXX   XXX|-|XXXXXX   XXXXXXXXXXXX   XXXXXXXXXXXX
  if (lhs_wrapping && rhs_wrapping) {
    const auto from = std::min(l_from, r_from);
    const auto to = std::max(l_to, r_to);
    if (to >= from) return WordType<Bits>::Any();
    auto result = WordType<Bits>::Range(from, to, zone);
    DCHECK(result.is_wrapping());
    return result;
  }
 
  if (rhs_wrapping)
    return LeastUpperBoundFromRanges<Bits>(r_from, r_to, l_from, l_to, zone);
  DCHECK(lhs_wrapping);
  DCHECK(!rhs_wrapping);
  // Case 3 & 4: lhs is wrapping, rhs is not
  // lhs XXX|----|XXX   XXX|----|XXX   XXXXX|--|XXX   X|-------|XX
  // rhs -------|XX|-   -|XX|-------   ----|XXXXX|-   ---|XX|-----
  // ==> XXX|---|XXXX   XXXX|---|XXX   XXXXXXXXXXXX   XXXXXX|--|XX
  if (r_from <= l_to) {
    if (r_to <= l_to)
      return WordType<Bits>::Range(l_from, l_to, zone);       // y covered by x
    if (r_to >= l_from) return WordType<Bits>::Any();         // ex3
    auto result = WordType<Bits>::Range(l_from, r_to, zone);  // ex 1
    DCHECK(result.is_wrapping());
    return result;
  } else if (r_to >= l_from) {
    if (r_from >= l_from)
      return WordType<Bits>::Range(l_from, l_to, zone);       // y covered by x
    DCHECK_GT(r_from, l_to);                                  // handled above
    auto result = WordType<Bits>::Range(r_from, l_to, zone);  // ex 2
    DCHECK(result.is_wrapping());
    return result;
  } else {
    const auto df = r_from - l_to;
    const auto dt = l_from - r_to;
    WordType<Bits> result =
        df > dt ? WordType<Bits>::Range(r_from, l_to, zone)  // ex 4
                : WordType<Bits>::Range(l_from, r_to, zone);
    DCHECK(result.is_wrapping());
    return result;
  }
}
 
template <size_t Bits>
// static
WordType<Bits> WordType<Bits>::LeastUpperBound(const WordType<Bits>& lhs,
                                               const WordType<Bits>& rhs,
                                               Zone* zone) {
  if (lhs.is_set()) {
    if (!rhs.is_set()) {
      if (lhs.set_size() == 1) {
        word_t e = lhs.set_element(0);
        if (rhs.is_wrapping()) {
          // If {rhs} already contains e, {rhs} is the upper bound.
          if (e <= rhs.range_to() || rhs.range_from() <= e) return rhs;
          return (e - rhs.range_to() < rhs.range_from() - e)
                     ? Range(rhs.range_from(), e, zone)
                     : Range(e, rhs.range_to(), zone);
        }
        return Range(std::min(e, rhs.range_from()), std::max(e, rhs.range_to()),
                     zone);
      }
 
      // TODO(nicohartmann@): A wrapping range may be a better fit in some
      // cases.
      return LeastUpperBoundFromRanges<Bits>(
          lhs.unsigned_min(), lhs.unsigned_max(), rhs.range_from(),
          rhs.range_to(), zone);
    }
 
    // Both sides are sets. We try to construct the combined set.
    base::SmallVector<word_t, kMaxSetSize * 2> result_elements;
    base::vector_append(result_elements, lhs.set_elements());
    base::vector_append(result_elements, rhs.set_elements());
    DCHECK(!result_elements.empty());
    base::sort(result_elements);
    auto it = std::unique(result_elements.begin(), result_elements.end());
    result_elements.pop_back(std::distance(it, result_elements.end()));
    if (result_elements.size() <= kMaxSetSize) {
      return Set(result_elements, zone);
    }
    // We have to construct a range instead.
    // TODO(nicohartmann@): A wrapping range may be a better fit in some cases.
    return Range(result_elements.front(), result_elements.back(), zone);
  } else if (rhs.is_set()) {
    return LeastUpperBound(rhs, lhs, zone);
  }
 
  // Both sides are ranges.
  return LeastUpperBoundFromRanges<Bits>(
      lhs.range_from(), lhs.range_to(), rhs.range_from(), rhs.range_to(), zone);
}
 
template <size_t Bits>
Type WordType<Bits>::Intersect(const WordType<Bits>& lhs,
                               const WordType<Bits>& rhs,
                               ResolutionMode resolution_mode, Zone* zone) {
  if (lhs.is_any()) return rhs;
  if (rhs.is_any()) return lhs;
 
  if (lhs.is_set() || rhs.is_set()) {
    const auto& x = lhs.is_set() ? lhs : rhs;
    const auto& y = lhs.is_set() ? rhs : lhs;
    base::SmallVector<word_t, kMaxSetSize * 2> result_elements;
    for (int i = 0; i < x.set_size(); ++i) {
      const word_t element = x.set_element(i);
      if (y.Contains(element)) result_elements.push_back(element);
    }
    if (result_elements.empty()) return Type::None();
    DCHECK(detail::is_unique_and_sorted(result_elements));
    return Set(result_elements, zone);
  }
 
  DCHECK(lhs.is_range() && rhs.is_range());
  const bool lhs_wrapping = lhs.is_wrapping();
  if (!lhs_wrapping && !rhs.is_wrapping()) {
    const auto result_from = std::max(lhs.range_from(), rhs.range_from());
    const auto result_to = std::min(lhs.range_to(), rhs.range_to());
    return result_to < result_from
               ? Type::None()
               : WordType::Range(result_from, result_to, zone);
  }
 
  if (lhs_wrapping && rhs.is_wrapping()) {
    const auto result_from = std::max(lhs.range_from(), rhs.range_from());
    const auto result_to = std::min(lhs.range_to(), rhs.range_to());
    auto result = WordType::Range(result_from, result_to, zone);
    DCHECK(result.is_wrapping());
    return result;
  }
 
  const auto& x = lhs_wrapping ? lhs : rhs;
  const auto& y = lhs_wrapping ? rhs : lhs;
  DCHECK(x.is_wrapping());
  DCHECK(!y.is_wrapping());
  auto subrange_low = Intersect(y, Range(0, x.range_to(), zone),
                                ResolutionMode::kPreciseOrInvalid, zone);
  DCHECK(!subrange_low.IsInvalid());
  auto subrange_high = Intersect(
      y, Range(x.range_from(), std::numeric_limits<word_t>::max(), zone),
      ResolutionMode::kPreciseOrInvalid, zone);
  DCHECK(!subrange_high.IsInvalid());
 
  if (subrange_low.IsNone()) return subrange_high;
  if (subrange_high.IsNone()) return subrange_low;
  auto s_l = subrange_low.template AsWord<Bits>();
  auto s_h = subrange_high.template AsWord<Bits>();
 
  switch (resolution_mode) {
    case ResolutionMode::kPreciseOrInvalid:
      return Type::Invalid();
    case ResolutionMode::kOverApproximate:
      return LeastUpperBound(s_l, s_h, zone);
    case ResolutionMode::kGreatestLowerBound:
      return (s_l.unsigned_max() - s_l.unsigned_min() <
              s_h.unsigned_max() - s_h.unsigned_min())
                 ? s_h
                 : s_l;
  }
}
 
template <size_t Bits>
void WordType<Bits>::PrintTo(std::ostream& stream) const {
  stream << (Bits == 32 ? "Word32" : "Word64");
  switch (sub_kind()) {
    case SubKind::kRange:
      stream << "[0x" << std::hex << range_from() << ", 0x" << range_to()
             << std::dec << "]";
      break;
    case SubKind::kSet:
      stream << "{" << std::hex;
      for (int i = 0; i < set_size(); ++i) {
        stream << (i == 0 ? "0x" : ", 0x");
        stream << set_element(i);
      }
      stream << std::dec << "}";
      break;
  }
}
 
template <size_t Bits>
Handle<TurboshaftType> WordType<Bits>::AllocateOnHeap(Factory* factory) const {
  if constexpr (Bits == 32) {
    if (is_range()) {
      return factory->NewTurboshaftWord32RangeType(range_from(), range_to(),
                                                   AllocationType::kYoung);
    } else {
      DCHECK(is_set());
      auto result = factory->NewTurboshaftWord32SetType(set_size(),
                                                        AllocationType::kYoung);
      for (int i = 0; i < set_size(); ++i) {
        result->set_elements(i, set_element(i));
      }
      return result;
    }
  } else {
    if (is_range()) {
      const auto [from_high, from_low] = uint64_to_high_low(range_from());
      const auto [to_high, to_low] = uint64_to_high_low(range_to());
      return factory->NewTurboshaftWord64RangeType(
          from_high, from_low, to_high, to_low, AllocationType::kYoung);
    } else {
      DCHECK(is_set());
      auto result = factory->NewTurboshaftWord64SetType(set_size(),
                                                        AllocationType::kYoung);
      for (int i = 0; i < set_size(); ++i) {
        const auto [high, low] = uint64_to_high_low(set_element(i));
        result->set_elements_high(i, high);
        result->set_elements_low(i, low);
      }
      return result;
    }
  }
}
 
template <size_t Bits>
bool FloatType<Bits>::Contains(float_t value) const {
  if (IsMinusZero(value)) return has_minus_zero();
  if (std::isnan(value)) return has_nan();
  switch (sub_kind()) {
    case SubKind::kOnlySpecialValues:
      return false;
    case SubKind::kRange: {
      return range_min() <= value && value <= range_max();
    }
    case SubKind::kSet: {
      for (int i = 0; i < set_size(); ++i) {
        if (set_element(i) == value) return true;
      }
      return false;
    }
  }
}
 
template <size_t Bits>
bool FloatType<Bits>::Equals(const FloatType<Bits>& other) const {
  if (sub_kind() != other.sub_kind()) return false;
  if (special_values() != other.special_values()) return false;
  switch (sub_kind()) {
    case SubKind::kOnlySpecialValues:
      return true;
    case SubKind::kRange: {
      return range() == other.range();
    }
    case SubKind::kSet: {
      if (set_size() != other.set_size()) {
        return false;
      }
      for (int i = 0; i < set_size(); ++i) {
        if (set_element(i) != other.set_element(i)) return false;
      }
      return true;
    }
  }
}
 
template <size_t Bits>
bool FloatType<Bits>::IsSubtypeOf(const FloatType<Bits>& other) const {
  if (special_values() & ~other.special_values()) return false;
  switch (sub_kind()) {
    case SubKind::kOnlySpecialValues:
      return true;
    case SubKind::kRange:
      if (!other.is_range()) {
        // This relies on the fact that we don't have singleton ranges.
        DCHECK_NE(range_min(), range_max());
        return false;
      }
      return other.range_min() <= range_min() &&
             range_max() <= other.range_max();
    case SubKind::kSet: {
      switch (other.sub_kind()) {
        case SubKind::kOnlySpecialValues:
          return false;
        case SubKind::kRange:
          return other.range_min() <= min() && max() <= other.range_max();
        case SubKind::kSet:
          for (int i = 0; i < set_size(); ++i) {
            if (!other.Contains(set_element(i))) return false;
          }
          return true;
      }
    }
  }
}
 
template <size_t Bits>
// static
FloatType<Bits> FloatType<Bits>::LeastUpperBound(const FloatType<Bits>& lhs,
                                                 const FloatType<Bits>& rhs,
                                                 Zone* zone) {
  uint32_t special_values = lhs.special_values() | rhs.special_values();
  if (lhs.is_any() || rhs.is_any()) {
    return Any(special_values);
  }
 
  const bool lhs_finite = lhs.is_set() || lhs.is_only_special_values();
  const bool rhs_finite = rhs.is_set() || rhs.is_only_special_values();
 
  if (lhs_finite && rhs_finite) {
    base::SmallVector<float_t, kMaxSetSize * 2> result_elements;
    if (lhs.is_set()) base::vector_append(result_elements, lhs.set_elements());
    if (rhs.is_set()) base::vector_append(result_elements, rhs.set_elements());
    if (result_elements.empty()) {
      return OnlySpecialValues(special_values);
    }
    base::sort(result_elements);
    auto it = std::unique(result_elements.begin(), result_elements.end());
    result_elements.pop_back(std::distance(it, result_elements.end()));
    if (result_elements.size() <= kMaxSetSize) {
      return Set(result_elements, special_values, zone);
    }
    return Range(result_elements.front(), result_elements.back(),
                 special_values, zone);
  } else if (lhs.is_only_special_values()) {
    return ReplacedSpecialValues(rhs, special_values).template AsFloat<Bits>();
  } else if (rhs.is_only_special_values()) {
    return ReplacedSpecialValues(lhs, special_values).template AsFloat<Bits>();
  }
 
  // We need to construct a range.
  float_t result_min = std::min(lhs.range_or_set_min(), rhs.range_or_set_min());
  float_t result_max = std::max(lhs.range_or_set_max(), rhs.range_or_set_max());
  return Range(result_min, result_max, special_values, zone);
}
 
template <size_t Bits>
// static
Type FloatType<Bits>::Intersect(const FloatType<Bits>& lhs,
                                const FloatType<Bits>& rhs, Zone* zone) {
  const uint32_t special_values = lhs.special_values() & rhs.special_values();
  if (lhs.is_any()) return ReplacedSpecialValues(rhs, special_values);
  if (rhs.is_any()) return ReplacedSpecialValues(lhs, special_values);
  if (lhs.is_only_special_values() || rhs.is_only_special_values()) {
    return special_values ? OnlySpecialValues(special_values) : Type::None();
  }
 
  if (lhs.is_set() || rhs.is_set()) {
    const auto& x = lhs.is_set() ? lhs : rhs;
    const auto& y = lhs.is_set() ? rhs : lhs;
    base::SmallVector<float_t, kMaxSetSize * 2> result_elements;
    for (int i = 0; i < x.set_size(); ++i) {
      const float_t element = x.set_element(i);
      if (y.Contains(element)) result_elements.push_back(element);
    }
    if (result_elements.empty()) {
      return special_values ? OnlySpecialValues(special_values) : Type::None();
    }
    return Set(result_elements, special_values, zone);
  }
 
  DCHECK(lhs.is_range() && rhs.is_range());
  const float_t result_min = std::max(lhs.min(), rhs.min());
  const float_t result_max = std::min(lhs.max(), rhs.max());
  if (result_min < result_max) {
    return Range(result_min, result_max, special_values, zone);
  } else if (result_min == result_max) {
    return Set({result_min}, special_values, zone);
  }
  return special_values ? OnlySpecialValues(special_values) : Type::None();
}
 
template <size_t Bits>
void FloatType<Bits>::PrintTo(std::ostream& stream) const {
  auto PrintSpecials = [this](auto& stream) {
    if (has_nan()) {
      stream << "NaN" << (has_minus_zero() ? "|MinusZero" : "");
    } else {
      DCHECK(has_minus_zero());
      stream << "MinusZero";
    }
  };
  stream << (Bits == 32 ? "Float32" : "Float64");
  switch (sub_kind()) {
    case SubKind::kOnlySpecialValues:
      PrintSpecials(stream);
      break;
    case SubKind::kRange:
      stream << "[" << range_min() << ", " << range_max() << "]";
      if (has_special_values()) {
        stream << "|";
        PrintSpecials(stream);
      }
      break;
    case SubKind::kSet:
      stream << "{";
      for (int i = 0; i < set_size(); ++i) {
        if (i != 0) stream << ", ";
        stream << set_element(i);
      }
      if (has_special_values()) {
        stream << "}|";
        PrintSpecials(stream);
      } else {
        stream << "}";
      }
      break;
  }
}
 
template <size_t Bits>
Handle<TurboshaftType> FloatType<Bits>::AllocateOnHeap(Factory* factory) const {
  float_t min = 0.0f, max = 0.0f;
  constexpr uint32_t padding = 0;
  if (is_only_special_values()) {
    min = std::numeric_limits<float_t>::infinity();
    max = -std::numeric_limits<float_t>::infinity();
    return factory->NewTurboshaftFloat64RangeType(
        special_values(), padding, min, max, AllocationType::kYoung);
  } else if (is_range()) {
    std::tie(min, max) = minmax();
    return factory->NewTurboshaftFloat64RangeType(
        special_values(), padding, min, max, AllocationType::kYoung);
  } else {
    DCHECK(is_set());
    auto result = factory->NewTurboshaftFloat64SetType(
        special_values(), set_size(), AllocationType::kYoung);
    for (int i = 0; i < set_size(); ++i) {
      result->set_elements(i, set_element(i));
    }
    return result;
  }
}
 
bool TupleType::Equals(const TupleType& other) const {
  if (size() != other.size()) return false;
  for (int i = 0; i < size(); ++i) {
    if (!element(i).Equals(other.element(i))) return false;
  }
  return true;
}
 
bool TupleType::IsSubtypeOf(const TupleType& other) const {
  if (size() != other.size()) return false;
  for (int i = 0; i < size(); ++i) {
    if (!element(i).IsSubtypeOf(other.element(i))) return false;
  }
  return true;
}
 
// static
Type TupleType::LeastUpperBound(const TupleType& lhs, const TupleType& rhs,
                                Zone* zone) {
  if (lhs.size() != rhs.size()) return Type::Any();
  Payload p;
  p.array = zone->AllocateArray<Type>(lhs.size());
  for (int i = 0; i < lhs.size(); ++i) {
    p.array[i] = Type::LeastUpperBound(lhs.element(i), rhs.element(i), zone);
  }
  return TupleType{static_cast<uint8_t>(lhs.size()), p};
}
 
void TupleType::PrintTo(std::ostream& stream) const {
  stream << "(";
  for (int i = 0; i < size(); ++i) {
    if (i != 0) stream << ", ";
    element(i).PrintTo(stream);
  }
  stream << ")";
}
 
template class EXPORT_TEMPLATE_DEFINE(V8_EXPORT_PRIVATE) WordType<32>;
template class EXPORT_TEMPLATE_DEFINE(V8_EXPORT_PRIVATE) WordType<64>;
template class EXPORT_TEMPLATE_DEFINE(V8_EXPORT_PRIVATE) FloatType<32>;
template class EXPORT_TEMPLATE_DEFINE(V8_EXPORT_PRIVATE) FloatType<64>;
 
}  // namespace v8::internal::compiler::turboshaft