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Re: patch that caused regression PR opt/9357
- From: Steven Bosscher <s dot bosscher at student dot tudelft dot nl>
- To: Andreas Jaeger <aj at suse dot de>
- Cc: Janis Johnson <janis187 at us dot ibm dot com>, gcc at gcc dot gnu dot org, jh at suse dot cz
- Date: 24 Feb 2003 18:01:34 +0100
- Subject: Re: patch that caused regression PR opt/9357
- References: <20030224084855.A1596@us.ibm.com> <howujpipzo.fsf@byrd.suse.de>
Op ma 24-02-2003, om 17:48 schreef Andreas Jaeger:
> Janis Johnson <janis187 at us dot ibm dot com> writes:
>
> > The regression reported in PR optimization/9357 (which affects GCC 3.3)
>
> As just mentioned on gcc-bugs: The problem is -fssa and this is not
> supported yet AFAIK. I suspect that Honza's patch just revealed
> another bug in -fssa.
>
> Shouldn't we disable -fssa for now?
There are quite a few PRs about -fssa, so apparently people use it even
if it's not supported. So just disabling is maybe not such a great
idea.
What is the long-term plan for RTL-SSA? Last time I read the rtlopt web
page, it said that Honza had been working on MidRTL. What's the plan
for that now?
Even with the tree-SSA branch merged, there are still cases where
RTL-SSA could be useful. But if the plan is to kill it altogether,
maybe it could be deprecate the feature for 3.4 (assuming the tree-SSA
will succeed and be merged before "3.5")??
Greetz
Steven