[Bug c/124659] Potential misoptimization involving __m128i pointer aliasing under -O2

xry111 at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Fri Mar 27 17:18:58 GMT 2026


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124659

Xi Ruoyao <xry111 at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |xry111 at gcc dot gnu.org

--- Comment #4 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
The behavior is undefined.  You cannot assume anything "intuitive" or not once
you invoke an undefined behavior.  There are much more "counter-intuitive"
results from undefined behavior and please stop spamming the bugzilla with
them.


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