This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug tree-optimization/18557] Inefficient code generated by -ftree-vectorize on Alpha
- From: "dberlin at dberlin dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 19 Nov 2004 03:42:29 -0000
- Subject: [Bug tree-optimization/18557] Inefficient code generated by -ftree-vectorize on Alpha
- References: <20041118235414.18557.falk@debian.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From dberlin at dberlin dot org 2004-11-19 03:42 -------
Subject: Re: Inefficient code generated by
-ftree-vectorize on Alpha
On Fri, 2004-11-19 at 00:04 +0000, pinskia at gcc dot gnu dot org wrote:
> ------- Additional Comments From pinskia at gcc dot gnu dot org 2004-11-19 00:04 -------
> Confirmed.
> One issue is that we don't fold stuff:
> D.1061 = 8 - 1;
> D.1065 = 2 - 1;
We correctly rely on CCP to clean it up :)
Having every single pass fold every statement it generates isn't
necessarily a win when CCP will do it for you :)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18557