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From: "peter at cordes dot ca" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/99754] [sse2] new _mm_loadu_si16 and _mm_loadu_si32
 implemented incorrectly
Date: Fri, 11 Mar 2022 15:21:50 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99754

--- Comment #3 from Peter Cordes <peter at cordes dot ca> ---
Wait a minute, the current implementation of _mm_loadu_si32 isn't
strict-aliasing or alignment safe!!!   That defeats the purpose for its
existence as something to use instead of _mm_cvtsi32_si128( *(int*)p );

The current code contains a deref of a plain (int*).
It should be using something like

typdef int unaligned_aliasing_int __attribute__((aligned(1),may_alias));=