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[Bug fortran/29975] [meta-bugs] ICEs with CP2K
- From: "pinskia at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 27 Jun 2007 09:37:33 -0000
- Subject: [Bug fortran/29975] [meta-bugs] ICEs with CP2K
- References: <bug-29975-6642@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #120 from pinskia at gmail dot com 2007-06-27 09:37 -------
Subject: Re: [meta-bugs] ICEs with CP2K
On 27 Jun 2007 08:24:46 -0000, jv244 at cam dot ac dot uk
<gcc-bugzilla@gcc.gnu.org> wrote:
> # BUG
> FCFLAGS = -O3 -ffast-math -ftree-vectorize -march=native
So -ffast-math with vectorizer changes the results.
I bet this is due to reduction which is done for -ffast-math with
-ftree-vectorize. Which case it might not be a bug. Yes 3 out of 130
is actually huge but if the values are huge to begin with, it might be
the case this is just a percussion issue.
-- Pinski
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29975