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Re: Alias Analysis Improvement Patch
- From: <tm_gccmail at mail dot kloo dot net>
- To: "Vladimir N. Makarov" <vmakarov at redhat dot com>
- Cc: law at redhat dot com, Andreas Jaeger <aj at suse dot de>,"Sanjiv Kumar Gupta, Noida" <sanjivg at noida dot hcltech dot com>,gcc-patches at gcc dot gnu dot org
- Date: Fri, 13 Jun 2003 15:02:14 -0700 (PDT)
- Subject: Re: Alias Analysis Improvement Patch
On Fri, 13 Jun 2003, Vladimir N. Makarov wrote:
> The compiler is also slower ~25% (890s vs 1140 s) with the new alias
> analysis on SPECINT2000.
>
> I did not check the code size (it is not important for Itanium).
>
> Practically the same picture is for SPECFP2000 tests (new aliasing results
> in incorrect work of 4 tests).
>
> Although I've found a test when the patch gives a big improvement (2%). It
> is whetstone
>
> Sanjiv, the results are frustrated ones but I am not giving up. I'll work
> on it. Alias analysis is important thing. Theoretically it is better
> approach then SSA one because it is flow sensitive. So I am going to find
> what is wrong with the results. Although I am not sure that it will happen
> soon.
>
> Another thing is we should speed up it considerably to justify the patch
> adoption.
>
> Vlad
>
>
>