Re: ira-loop-pressure not marked as optimization?

[Paulo Matos <paulo at matos-sorge dot com>]

On 06/03/14 21:03, Vladimir Makarov wrote:
> On 03/06/2014 03:14 PM, Paulo J. Matos wrote:
> > I have just run a few long benchmarks and even though I had high
> > expectations for improving performance the flag in our port causes a
> > ~3% degradation in performance. Haven't had time to investigate why.
>
>
> Strange.  What port is this?  Can I see the benchmarks.  I know Pat
> Haugen from IBM found a bug which can generated worse code in some cases
> and has a fix.  I hope Pat submits it on stage 1.

Vladimir, unfortunately I cannot send the benchmarks as they are private 
customer code. However, I will investigate the degradation and try to 
find a case which I can reduce and post on the list.

The port is for an internal Broadcom chip, SIMD/VLIW sharing some 
similarities and technical issues from a compiler point of view as IA-64.

> > Still, would you accept a patch to mark this flag as an optimization?
> I think we should.

I will submit a patch to gcc-patches.

Thanks,

--
Paulo Matos