[Bug tree-optimization/17863] [4.0 Regression] threefold performance loss, not inlining as much

kunert at physik dot tu-dresden dot de gcc-bugzilla@gcc.gnu.org
Fri Feb 25 16:39:00 GMT 2005


------- 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



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