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[Bug tree-optimization/18880] DSE is not doing its job for global variables
- From: "law at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 8 Dec 2004 20:02:38 -0000
- Subject: [Bug tree-optimization/18880] DSE is not doing its job for global variables
- References: <20041208022054.18880.pinskia@gcc.gnu.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From law at redhat dot com 2004-12-08 20:02 -------
Subject: Re: DSE is not doing its job for
global variables
On Wed, 2004-12-08 at 18:03 +0000, pinskia at gcc dot gnu dot org wrote:
> ------- Additional Comments From pinskia at gcc dot gnu dot org 2004-12-08 18:03 -------
> Yes I know it is regression only time which is why I filed it and marked it as an
> enhancement
OK.
> but I should note that I found this while looking into a benchmark.
Were you looking at the final output, or just the output from the SSA
optimizers? As I mentioned, we have a DSE that works on the RTL level
which ought to have a reasonable chance of catching this.
If you get a chance to play with the patch and benchmark it, that would
be great.
Jeff
ps. What benchmark?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18880