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Re: GCSE store motion
- From: Mark Mitchell <mark at codesourcery dot com>
- To: "law at redhat dot com" <law at redhat dot com>, David Edelsohn <dje at watson dot ibm dot com>
- Cc: Roger Sayle <roger at eyesopen dot com>, Daniel Berlin <dberlin at dberlin dot org>, "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>, "David S. Miller" <davem at redhat dot com>, Andreas Jaeger <aj at suse dot de>, Richard Henderson <rth at redhat dot com>
- Date: Wed, 15 May 2002 11:52:24 -0700
- Subject: Re: GCSE store motion
- References: <firstname.lastname@example.org>
--On Wednesday, May 15, 2002 11:40:25 AM -0600 "email@example.com"
> In message <200205151706.NAA23886@makai.watson.ibm.com>, David Edelsohn
> writes: > Maybe we should rearrange the disabling so that toplev.c
> defaults > flag_gcse_sm to 0 instead of disabling the optimization in
> gcse.c itself. > Then this file in glibc could be compiled with
> -fgcse-sm in the one > instance it has been shown to be useful.
> > When store motion shows performance improvement across a wider
> > range of applications, then we can enable that optimization by default.
> Seems reasonable to me.
Me too, as long as we have evidence that it is useful to some people.
I agree that a separate optimization flag, not turned on by default
with any level of -O, would make sense in that case.
Mark Mitchell firstname.lastname@example.org
CodeSourcery, LLC http://www.codesourcery.com