[Bug c/80640] Missing memory side effect

[nicolas@morey-chaisemartin.com]

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

--- Comment #2 from Nicolas Morey-Chaisemartin <nicolas@morey-chaisemartin.com> ---
Created attachment 41325
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41325&action=edit
Test case

Previous tarball was too big. I stripped all debug info from the lib and it
should work now :)