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[Bug tree-optimization/17790] [4.0 Regression] Significant compile time increases for sixtrack with tree LICM and IV optimization
- From: "rakdver at atrey dot karlin dot mff dot cuni dot cz" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 6 Dec 2004 00:12:58 -0000
- Subject: [Bug tree-optimization/17790] [4.0 Regression] Significant compile time increases for sixtrack with tree LICM and IV optimization
- References: <20041002022458.17790.dberlin@gcc.gnu.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From rakdver at atrey dot karlin dot mff dot cuni dot cz 2004-12-06 00:12 -------
Subject: Re: [4.0 Regression] Significant compile time increases for sixtrack with tree LICM and IV optimization
> ------- Additional Comments From pinskia at gcc dot gnu dot org 2004-12-06 00:02 -------
> Hmm, I found another testcase where we are slow at LIM:
> loop invariant motion : 2.55 ( 5%) usr 0.40 ( 3%) sys 3.36 ( 4%) wall
> This is PR8361.
>
> Zdenek can you update your patch for the changes where V_MUST_DEF changes and see what the
> compile time improvements you get with the patch?
there is an updated version of the patch
http://gcc.gnu.org/ml/gcc-patches/2004-10/msg01642.html
that should work (possibly with minor changes due to some renaming).
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17790