http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59100
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Yeah, see PR45216 and PR57157. Recognizing n?rotate<x,n>:x as rotate<x,n> can
be done, but probably not in forwprop or at least not at the same spot as
simplify_rotate, because it involves PHIs and different basic blocks.
Anyway, if you are going to recommend some idiom, I think the one in PR57157 is
better because if it doesn't get optimized into the rotate, it at least doesn't
contain any conditionals.
