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[Bug tree-optimization/21550] [4.0/4.1 Regression] i686 floating point performance 33% slower than gcc 3.4.3
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 13 May 2005 18:03:46 -0000
- Subject: [Bug tree-optimization/21550] [4.0/4.1 Regression] i686 floating point performance 33% slower than gcc 3.4.3
- References: <20050513152203.21550.trt@acm.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-05-13 18:03 -------
I think this basically goes back to the correct selection of IVs and i386 addressing mode, aka a*4+b
and such, there are other bugs opened about that already.
--
What |Removed |Added
----------------------------------------------------------------------------
Component|c |tree-optimization
Keywords| |missed-optimization
Summary|i686 floating point |[4.0/4.1 Regression] i686
|performance 33% slower than |floating point performance
|gcc 3.4.3 |33% slower than gcc 3.4.3
Target Milestone|--- |4.0.1
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21550