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Revert "[libcxx] use __builtin_isnan in std::isnan." #1523

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Merged
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Jul 24, 2020
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Revert "[libcxx] use __builtin_isnan in std::isnan." #1523

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4 changes: 0 additions & 4 deletions libcxx/include/math.h
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Original file line number Diff line number Diff line change
Expand Up @@ -510,11 +510,7 @@ _LIBCPP_INLINE_VISIBILITY
bool
__libcpp_isnan(_A1 __lcpp_x) _NOEXCEPT
{
#if __has_builtin(__builtin_isnan)
return __builtin_isnan(__lcpp_x);
#else
return isnan(__lcpp_x);
#endif
}

#undef isnan
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