[Bug target/120001] On RISC-V with -O2 and -O3 __sync_or_and_fetch in a loop renders as an endless loop and multiple amoor

[vincenzo.romano at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120001

--- Comment #6 from Vincenzo Romano <vincenzo.romano at gmail dot com> ---
MAybe I have not been clear.
In cases with -O2 and -O2 the infinite loop is over 2 amoor identical
instruction.
Maybe I don't know RISC-V architecture that well, but it looks like a bug to
me: one amoor should suffice, just like with -Os.