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Re: Regression in LAPACK with -O3

From: Andrew Pinski <pinskia at physics dot uc dot edu>
To: Steve Kargl <sgk at troutmask dot apl dot washington dot edu>
Cc: Dominique Dhumieres <dominiq at lps dot ens dot fr>, fortran at gcc dot gnu dot org
Date: Tue, 31 Jan 2006 00:35:13 -0500
Subject: Re: Regression in LAPACK with -O3
References: <43DE5BE2.mail21W117ON5@tournesol.lps.ens.fr> <20060130184308.GA78197@troutmask.apl.washington.edu>

On Jan 30, 2006, at 1:43 PM, Steve Kargl wrote:

On Mon, Jan 30, 2006 at 07:33:06PM +0100, Dominique Dhumieres wrote:
I noticed that gfortran fails the LAPACK tests when compiled with -O3. I have isolated (at least part of) the problem in the program given at the end of this mail. I have also been able to trace the problem between the 8th and 9th of January (the right answer is 21):

This is PR 26001.


I attached a fix for people to look at.  It has not been
bootstrap/tested yet (though it is in the process of that).
But this patch fixes both the reduced testcase I generated
and the testcase here.

-- Pinski

Follow-Ups:
- Re: Regression in LAPACK with -O3
  - From: Paul Thomas

References:
- Regression in LAPACK with -O3
  - From: Dominique Dhumieres
- Re: Regression in LAPACK with -O3
  - From: Steve Kargl

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