https://bugs.kde.org/show_bug.cgi?id=409429
Étienne Dupuis <svart.ridd...@gmail.com> changed:
What |Removed |Added
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CC| |svart.ridd...@gmail.com
--- Comment #4 from Étienne Dupuis <svart.ridd...@gmail.com> ---
The following function allows detection of whether valgrind has the bug or not,
when compiled with clang + AVX2 enabled:
[[clang::optnone]]
static bool checkValgrindBug409429Fixed()
{
if (RUNNING_ON_VALGRIND) {
alignas(32) uint8_t m[32];
__m256i r = *reinterpret_cast<const __m256i *>(m);
*reinterpret_cast<__m256i *>(m) = _mm256_cmpeq_epi8(r, r);
if ((m[0] != 0xFF) || VALGRIND_COUNT_ERRORS)
return false;
}
return true;
}
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