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Re: tree-ssa memory and compile-time regressions

From: Daniel Berlin <dberlin at dberlin dot org>
To: Gerald Pfeifer <gp at suse dot de>
Cc: gcc at gcc dot gnu dot org,Jan Hubicka <jh at suse dot cz>,Richard Guenther <rguenth at tat dot physik dot uni-tuebingen dot de>,Diego Novillo <dnovillo at redhat dot com>
Date: Thu, 8 Jan 2004 11:29:17 -0500
Subject: Re: tree-ssa memory and compile-time regressions
References: <Pine.LNX.4.53.0401081510250.4680@bellatrix.tat.physik.uni-tuebingen.de> <Pine.LNX.4.58.0401081600310.4268@D209.suse.de>


This mimics my experience with recent tree-ssa: Despite significant
improvements, I simply cannot build the application behind PR8361 with
-O3 any longer (while that used to work on the very same machine).

Both -fno-unit-at-a-time and...

This is where the *bug* lies

Diego Novillo <dnovillo@redhat.com> wrote:
Hmm, based on what the time report says, could you try with
-fno-tree-pre?
...-fno-tree-pre make the problem go away.

and this i explained a minute ago to Richard.

Rest assured, I am working on it, it's just going to take time.

--Dan

References:
- tree-ssa memory and compile-time regressions
  - From: Richard Guenther
- Re: tree-ssa memory and compile-time regressions
  - From: Gerald Pfeifer

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