[Bug target/107713] Wrong implementation atomic_exchange on LoongArch

[xry111 at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107713

--- Comment #6 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
Fixed for trunk.  Should we backport it to gcc-12 branch too?