Re: IRA performance testing on Fortran

[Vladimir Makarov <vmakarov at redhat dot com>]

David Edelsohn wrote:
> > > > > > FX  writes:
> > > > > >             
>
> FX> The performance regression is mainly due to one testcase, induct,
> FX> which is taking a 30% hit on IRA. If the performance of that one were
> FX> the same with IRA than with the old allocator, the switch would be
> FX> (for this benchmark) performance-neutral. So, I have investigated the
> FX> case of induct, and I found that with the IRA branch compiler without
> FX> -fira, it's already 30% slower than with trunk. So, is it an issue
> FX> with the IRA branch, or has it just not been merged recently and we
> FX> had a recent great improvement of induct on trunk? I'd appreciate if
> FX> you could enlighten me on this point.
>
> 	The IRA branch has not been merged recently and does not include
> many of Richi's recent alias analysis improvements.
>
>   
Thanks for the info, David.  I think you are right.  I've checked 
polyhedron on my machine (Intel Core2) on ira branch using IRA and the 
old register allocator and I don't see difference between the allocators.

I should have merged mainline into the branch but I am afraid it will 
only happens on next week because I have some patches which I am working on.