> On Tue, Nov 19, 2013 at 1:42 PM, Jan Hubicka wrote: > > The patch also removes simple peeling at RTL level that is mostly obsoleted > > by > > gimple level (in few cases in our testsuite the RTL code is able to > > determine > > loop bounds better than gimple code, but these seems to be just weird cases > > that > > should be handled independently at gimple level) > > No targets that emit small-count loops for block moves?
Well, we have move_by_pieces and set_by_pieces for that reason. simple peeling works only for loop with profile, so those expand-generated loop won't count. I can imagine someone would emit loop with known count small enough so complete peeling may match. I would however declare this to be expansion work to choose proper loop/non-loop consruct in these cases rather than relying on rtl peeling. It is what happens for i386. Honza > > Ciao! > Steven
