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[Bug middle-end/19721] [meta-bug] optimizations that CSE still catches
- From: "stevenb at suse dot de" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 2 Feb 2005 09:21:57 -0000
- Subject: [Bug middle-end/19721] [meta-bug] optimizations that CSE still catches
- References: <20050131123257.19721.steven@gcc.gnu.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From stevenb at suse dot de 2005-02-02 09:21 -------
Subject: Re: [meta-bug] optimizations that CSE still catches
On Monday 31 January 2005 22:35, law at redhat dot com wrote:
> Note I would _STRONGLY_ recommend people look at more than just the
> compiler when evaluating the old CSE code. In particular it is
> important that we look at things like 64bit arithmetic on 32bit
> hosts (which happens often in kernels, but not nearly as often
> in user level benchmarks).
I was told crafty has a lot of 64bits arithmetic, so the -m32
numbers for crafty should be an indication of possible regressions
in that area. And those numbers look OK to me.
If I can find some time, I'll try another benchmark suite to see
the effects of CSE path following are significant enough to still
be worth its cost.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19721