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[Bug tree-optimization/17863] [4.0 Regression] threefold performance loss, not inlining as much
- From: "kunert at physik dot tu-dresden dot de" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 25 Feb 2005 09:52:09 -0000
- Subject: [Bug tree-optimization/17863] [4.0 Regression] threefold performance loss, not inlining as much
- References: <20041006153323.17863.kunert@physik.tu-dresden.de>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From kunert at physik dot tu-dresden dot de 2005-02-25 09:52 -------
Subject: Re: [4.0 Regression] threefold performance
loss, not inlining as much
Wow. Many thanks for that analysis. Now I will go and fetch the patch. Since nobody seems to care about improving the inlining parameters, I'd love to see this patch in 4.0.
Thomas Kunert
rguenth at gcc dot gnu dot org wrote:
> ------- Additional Comments From rguenth at gcc dot gnu dot org 2005-02-24 17:09 -------
> With __attribute__((leafify)) sticked to v4c_quad and mult_pq runtime goes down
> from 16.0s to 4.4s with recent gcc 4.0. For gcc 3.4.3 runtimes are 5.0s and 4.9s.
>
> We indeed do not very well on estimating the size of template metaprograms in 4.0.
>
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17863