-/// \brief Helper to hash the value of a single integer.
-///
-/// Overloads for smaller integer types are not provided to ensure consistent
-/// behavior in the presence of integral promotions. Essentially,
-/// "hash_value('4')" and "hash_value('0' + 4)" should be the same.
-inline hash_code hash_integer_value(uint64_t value) {
- // Similar to hash_4to8_bytes but using a seed instead of length.
- const uint64_t seed = get_execution_seed();
- const char *s = reinterpret_cast<const char *>(&value);
- const uint64_t a = fetch32(s);
- return hash_16_bytes(seed + (a << 3), fetch32(s + 4));
-}
-
-} // namespace detail
-} // namespace hashing
-
-
-/// \brief Override the execution seed with a fixed value.
-///
-/// This hashing library uses a per-execution seed designed to change on each
-/// run with high probability in order to ensure that the hash codes are not
-/// attackable and to ensure that output which is intended to be stable does
-/// not rely on the particulars of the hash codes produced.
-///
-/// That said, there are use cases where it is important to be able to
-/// reproduce *exactly* a specific behavior. To that end, we provide a function
-/// which will forcibly set the seed to a fixed value. This must be done at the
-/// start of the program, before any hashes are computed. Also, it cannot be
-/// undone. This makes it thread-hostile and very hard to use outside of
-/// immediately on start of a simple program designed for reproducible
-/// behavior.
-void set_fixed_execution_hash_seed(size_t fixed_value);
-
-
-/// \brief Compute a hash_code for any integer value.
-///
-/// Note that this function is intended to compute the same hash_code for
-/// a particular value without regard to the pre-promotion type. This is in
-/// contrast to hash_combine which may produce different hash_codes for
-/// differing argument types even if they would implicit promote to a common
-/// type without changing the value.
-template <typename T>
-typename enable_if<is_integral<T>, hash_code>::type hash_value(T value) {
- return ::llvm::hashing::detail::hash_integer_value(value);
-}
-
-/// \brief Compute a hash_code for a pointer's address.
-///
-/// N.B.: This hashes the *address*. Not the value and not the type.
-template <typename T> hash_code hash_value(const T *ptr) {
- return ::llvm::hashing::detail::hash_integer_value(
- reinterpret_cast<uintptr_t>(ptr));
-}
-
-
-// Implementation details for implementing hash combining functions.
-namespace hashing {
-namespace detail {
-