nikic wrote:

@zygoloid Thanks for the explanation! I wasn't aware this fell under 
unspecified behavior. It's weird that alignment information can survive a `void 
*` cast, but it does make some sense.

What seems worrying here is that apparently GCC and Clang do not agree on 
semantics in this case (https://godbolt.org/z/1r9df5a4a). GCC does not assume 
that the pointers are aligned. The perils of unspecified behavior....

https://github.com/llvm/llvm-project/pull/67766
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