[Bug c/59100] requesting optimization of safe rotate function

[glisse at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59100

--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
IIRC we already added another safe rotate form this year based on a report by
Niels, you may want to search for that (maybe in the comment before
simplify_rotate in tree-ssa-forwprop.c).

Basically you are asking to optimize n?rotate(x,n):x to rotate(x,n), makes
sense.