[Bug tree-optimization/99396] std::rotl and std::rotr Does not convert into ROTATE on the gimple level

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99396

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Ah, but __digits is one smaller than we want for signed types.
Plus before C++20 the left shifts of negative values are UB?
Maybe all the rotates should be implemented using the corresponding unsigned
types...