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x86_64: Should the -mavx* options affected __alignof__ (max_align_t)?


__alignof__ (max_align_t) appears to be stuck at 16, even though some
AVX512 operations require 512 byte alignment.

Is this intentional?  There are arguments for (more ABI compatibility)
and against (max_align_t is misleading) this behavior.

-- 
Florian Weimer / Red Hat Product Security


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