https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93512
--- Comment #4 from Segher Boessenkool <segher at gcc dot gnu.org> --- I said (or I meant, at least) that as far as I see and know, all rotate instructions on all machines do this truncation. It is of course possible for targets to write it in RTL that only works for a limited range of inputs )with shifts and an ior, or similar).
