[PATCH] Fix PR56605

[Bill Schmidt]

On Wed, 2013-03-20 at 14:50 +0100, Jakub Jelinek wrote:
> On Wed, Mar 20, 2013 at 08:45:16AM -0500, Bill Schmidt wrote:
> > Eric, thanks -- fixed in trunk.  Looks like I've missed the window for
> > 4.8.0.  Is this OK for backport once 4.8 opens up again?  (Copying
> > Richi/Jakub as well.)
> 
> Not for 4.8.0 (this isn't a wrong-code, just missed-optimization, right?),
> but guess for 4.8.1 it might be ok if it doesn't cause any issues on the
> trunk for a few weeks.

Correct, just missed optimization.  OK, I'll revisit it for 4.8 sometime
next month.  Thanks!

Bill

> 
> > On Mon, 2013-03-18 at 17:31 +0100, Eric Botcazou wrote:
> > > > 2013-03-13  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
> > > > 	    Steven Bosscher <steven@gcc.gnu.org>
> > > > 
> > > > 	PR rtl-optimization/56605
> > > > 	* loop-iv.c (implies_p): Handle equal RTXs and subregs.
> > > > 
> > > > gcc/testsuite:
> > > > 
> > > > 2013-03-13  Bill Schmidt  wschmidt@linux.vnet.ibm.com>
> > > > 
> > > > 	PR rtl-optimization/56605
> > > > 	* gcc.target/powerpc/pr56605.c: New.
> > > 
> > > OK, thanks.
> 
> 	Jakub
>