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[Bug tree-optimization/32921] [4.3 Regression] Revision 126326 causes 12% slowdown
- From: "rguenther at suse dot de" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 28 Jul 2007 20:59:26 -0000
- Subject: [Bug tree-optimization/32921] [4.3 Regression] Revision 126326 causes 12% slowdown
- References: <bug-32921-682@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #7 from rguenther at suse dot de 2007-07-28 20:59 -------
Subject: Re: [4.3 Regression] Revision 126326
causes 12% slowdown
On Sat, 28 Jul 2007, hjl at lucon dot org wrote:
> causes this performance regression.
>
> 437.leslie3d is a big file with 19 functions. If I put each function in
> a separate file, there is no regression. If I put 2 particular functions
> in one file, there are 10-30% regressions depending on input file. Those
> 2 functions work on several global arrays.
>
> I tried " --param max-aliased-vops=1000000 --param avg-aliased-vops=7".
> It doesn't make a difference.
This sounds strange and maybe relates this to PR32624.
Richard.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32921