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fix ub type punning

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Yakov Olkhovskiy 2022-11-09 09:39:27 -05:00 committed by GitHub
parent d02d1fd489
commit 7f28a89273
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1 changed files with 3 additions and 8 deletions
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11
src/Common/HashTable/Hash.h
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@ -224,14 +224,9 @@ template <typename T>
requires (sizeof(T) <= sizeof(UInt64)) requires (sizeof(T) <= sizeof(UInt64))
inline size_t hashCRC32(T key, DB::UInt64 updated_value = -1) inline size_t hashCRC32(T key, DB::UInt64 updated_value = -1)
{ {
union DB::UInt64 out {0};
{ std::memcpy(&out, &key, sizeof(T));
T in; return intHashCRC32(out, updated_value);
DB::UInt64 out;
} u;
u.out = 0;
u.in = key;
return intHashCRC32(u.out, updated_value);
} }
template <typename T> template <typename T>