This is the mail archive of the gcc@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: Loop unrolling-related SPEC regressions?


Richard Henderson wrote:

> On Fri, Feb 01, 2002 at 07:50:03PM +0100, Paolo Carlini wrote:
> > Otherwise, we should find one somewhere else. Where??
>
> There are other benchmarks.  Some of them are on gcc.gnu.org
> somewhere (there's a link off the web pages).  Try them and
> see if we regress -funroll-loops.

Ok. I will try to do my best during the weekend.

> Note that I have no confidence that -funroll-all-loops is a
> useful thing to try.  You're overriding the logic in the
> unroller that tries to decide if the unrolling would pay off.

I see.
Perhaps we could ask Andreas to help by running an exceptional SPEC test with
-funroll-loops instead (ideally, 2 different runs, pre- and post- the unroller
patch).

Cheers,
Paolo.



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