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Fix strict aliasing violation in the neon batch_bool load #1420

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Merged
serge-sans-paille merged 1 commit into from
Oct 1, 2026
Merged

Fix strict aliasing violation in the neon batch_bool load #1420

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4 changes: 3 additions & 1 deletion include/xsimd/arch/xsimd_neon.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -518,7 +518,9 @@ namespace xsimd
template <class A, class T, detail::enable_sized_t<T, 4> = 0>
XSIMD_INLINE batch_bool<T, A> load_unaligned(bool const* mem, batch_bool<T, A>, requires_arch<neon>) noexcept
{
uint8x8_t tmp = vreinterpret_u8_u32(vset_lane_u32(*(unsigned int*)mem, vdup_n_u32(0), 0));
uint32_t bits;
std::memcpy(&bits, mem, sizeof(bits));
uint8x8_t tmp = vreinterpret_u8_u32(vset_lane_u32(bits, vdup_n_u32(0), 0));
auto const vmem = batch<uint32_t, A>(vmovl_u16(vget_low_u16(vmovl_u8(tmp))));
auto const zero = batch<uint32_t, A> { 0 };
return { (zero - vmem).data };
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