[Bug rtl-optimization/109930] transform atomic exchange to unconditional store when old value is unused?

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109930

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Can you proivde a testcase that can be compiled?