https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99396
--- Comment #2 from cqwrteur <unlvsur at live dot com> --- (In reply to Andrew Pinski from comment #1) > return std::rotr(v,((unsigned int)t)&63); > Fixes the problem .... > int a = std::abs(t); > a &= 63; > return std::rotr(v,a); > > Also improves the situtation. > I am thinking the std::rotr could be rewritten or we could optimize this at > the tree level into the almost the intrinsics. > Note I think I Might have gotten the above incorrect a little bit. I would like to see __builtin_cpp_rotl and __builtin_cpp_rotr to allow more aggressive optimizations since rotl and rotr are so important for cryptography.
