[Bug c/80640] Missing memory side effect

[nico...@morey-chaisemartin.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80640

--- Comment #6 from Nicolas Morey-Chaisemartin <nico...@morey-chaisemartin.com> 
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Ok. So there's something wrong :)
I'll make a work around for SUSE while waiting for a fix in GCC