On Thu, May 14, 2015 at 09:51:18AM -0400, David Edelsohn wrote: > On Wed, May 13, 2015 at 1:29 PM, Segher Boessenkool > <seg...@kernel.crashing.org> wrote: > > On Wed, May 13, 2015 at 01:25:16PM -0400, David Edelsohn wrote: > >> > PR rtl-optimization/30967 > >> > * config/rs6000/rs6000.c (rs6000_rtx_costs): Don't consider > >> > destination mode for the cost of scc patterns. > >> > >> Okay. > >> > >> Should this be applied to GCC 5 branch? > > > > [ Testing is still in progress. ] > > > > It should be prefectly safe to backport; OTOH, it is just one of very > > many cases where we generate an extra sign-extend, so I don't think it > > is particularly useful. Your choice :-) > > The other prereqs are backported, so probably should backport this also.
The only related patch that could be backported (the compare imm thing) is not backported yet AFAIK (I haven't checked); should it be? This cost patch improves things with or without it. Segher
