This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: [PATCH] rs6000: Improve rtx_costs for EQ a bit (PR30967)


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 :-)


Segher


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]