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Date: Thu, 09 Jul 2009 14:48:00 -0000
From: Andreas =?iso-8859-1?Q?Sch=E4fer?= <gentryx@gmx.de>
To: Richard Guenther <richard.guenther@gmail.com>
Cc: gcc@gcc.gnu.org
Subject: Re: Strange Performance Hit on 2D-Loop
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On 16:37 Thu 09 Jul     , Richard Guenther wrote:
> Depends on the GCC version used.  First of all
>=20
>     printAddress(&gridNew[0][0]);
>     printAddress(&gridOld[0][0]);
>=20
> makes the addresses escape and GCC versions other than the
> current development trunk think that the malloced address can
> alias the global variables.

AFAICS that doesn't really matter: I still get the same results, even
if I remove printAddress().

-Andreas


--=20
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Andreas Sch=E4fer
Cluster and Metacomputing Working Group
Friedrich-Schiller-Universit=E4t Jena, Germany
0049/3641-9-46376
PGP/GPG key via keyserver
I'm a bright... http://www.the-brights.net
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(\___/)
(+'.'+)
(")_(")
This is Bunny. Copy and paste Bunny into your=20
signature to help him gain world domination!

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