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Re: Polyhedron performance regression

From: Steve Kargl <sgk at troutmask dot apl dot washington dot edu>
To: Paul Richard Thomas <paul dot richard dot thomas at gmail dot com>
Cc: FX Coudert <fxcoudert at gmail dot com>, Uros Bizjak <ubizjak at gmail dot com>, stevenb dot gcc at gmail dot com, richard dot guenther at gmail dot com, paolo dot bonzini at lu dot unisi dot ch, fortran at gcc dot gnu dot org
Date: Mon, 13 Nov 2006 10:19:21 -0800
Subject: Re: Polyhedron performance regression
References: <339c37f20611120416j32a7798ft318d63b604d18a56@mail.gmail.com> <FAE7FB3C-8DC3-4DAE-95A4-565D1B9B027C@gmail.com> <339c37f20611130956h794f950j766fe354156e1944@mail.gmail.com>

On Mon, Nov 13, 2006 at 06:56:21PM +0100, Paul Richard Thomas wrote:
> FX,
> >
> >
> >I'm ashamed that revision 118492
> >(http://gcc.gnu.org/viewcvs?view=rev&revision=118492), which
> >introduced this performance regression, is the MOD/MODULO patch by
> >Paul Thomas and myself.
> 
> We have to make a decision quickly as to whether to wait for the library
> to be put right, if it can be, or to comment out the platch for the time
> being.  Please note that I am unable to do a thing to trunk or 4.2,
> since the firewall of the site that I am at will not have anything to do
> with ssh.

Doesn't the patch actually correct a domain where gfortran
gives wrong answers?  I would prefer "slow and correct" over 
"fast and wrong" any day.

-- 
Steve

References:
- Re: Polyhedron performance regression
  - From: Paul Richard Thomas
- Re: Polyhedron performance regression
  - From: FX Coudert
- Re: Polyhedron performance regression
  - From: Paul Richard Thomas

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