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[Bug rtl-optimization/24123] Massive performance regression for -ffast-math due to the recip tree pass
- From: "pinskia at physics dot uc dot edu" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 29 Sep 2005 14:32:12 -0000
- Subject: [Bug rtl-optimization/24123] Massive performance regression for -ffast-math due to the recip tree pass
- References: <20050929140549.24123.uros@kss-loka.si>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From pinskia at physics dot uc dot edu 2005-09-29 14:32 -------
Subject: Re: Massive performance regression for -ffast-math due to the recip tree pass
>
>
> ------- Additional Comments From uros at kss-loka dot si 2005-09-29 14:25 -------
> (In reply to comment #1)
> > This is really a RA issue rather than anything else.
>
> Please this patch...
No, the RA is supposed to move the divisions so that things don't spill.
Can you also try the patch at
http://gcc.gnu.org/ml/gcc-patches/2005-09/msg01555.html
-- Pinski
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24123