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Add defense for builtin_clz/builtin_ctz in case that input is zero

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This commit is contained in:
obdev
2021-07-18 15:24:13 +08:00
committed by wangzelin.wzl
parent 3a6db0a542
commit 4770dbcdcb
9 changed files with 14 additions and 8 deletions
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1
src/sql/engine/expr/ob_expr_estimate_ndv.cpp
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@ -80,6 +80,7 @@ void ObExprEstimateNdv::llc_estimate_ndv(int64_t& result, const ObString& bitmap
}
uint64_t ObExprEstimateNdv::llc_leading_zeros(uint64_t value, uint64_t bit_width)
{
OB_ASSERT(0ULL != value);
return std::min(bit_width, static_cast<uint64_t>(__builtin_clzll(value)));
}

3
src/sql/engine/expr/ob_expr_res_type_map.h
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@ -126,8 +126,9 @@ public:
typedef bool (*is_type_func)(common::ObObjType type);
static constexpr int flag2bit(uint64_t flag)
static int flag2bit(uint64_t flag)
{
OB_ASSERT(0ULL != flag);
return static_cast<int>(__builtin_ctzll(flag));
}