[Bug target/120920] RISC-V: Possible optimization of bswap when zbb is enabled

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120920

--- Comment #2 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Dusan posted a patch here, but I'm not convinced it's correct.  Also note the
patch failed its own test:

https://patchwork.sourceware.org/project/gcc/patch/pr3pr08mb5738ed049e790435a3b5a8aebe...@pr3pr08mb5738.eurprd08.prod.outlook.com/