[Bug tree-optimization/117927] [15 Regression] Invalid rotate optimization

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117927

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
And if you go the masking way, it should be single use on the subtraction (or
addition), otherwise it isn't a win from GIMPLE IL POV (trading 2 statements
for 3).