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Re: Compilation performance comparison of 3.5.0 and TreeSSA trees on MICO sources as requested in: [tree-ssa] Merge status 2004-05-03

From: Mike Stump <mrs at apple dot com>
To: Diego Novillo <dnovillo at redhat dot com>
Cc: Karel Gardas <kgardas at objectsecurity dot com>, "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>
Date: Tue, 4 May 2004 18:43:49 -0700
Subject: Re: Compilation performance comparison of 3.5.0 and TreeSSA trees on MICO sources as requested in: [tree-ssa] Merge status 2004-05-03

On Tuesday, May 4, 2004, at 03:10 PM, Diego Novillo wrote:

Thanks.  -O0 is a known loser right now.  The gimplification process
tends to create extremely bloated RTL.  That can only be fixed by
introducing simplistic tree optimization passes at O0.  I see this as a
post-merge exercise, as well.

After asking around here, our position is that while we would like to see no regressions on compile time at -O0, we do _not_ want to hold up the merge to mainline for it.

Follow-Ups:
- Re: Compilation performance comparison of 3.5.0 and TreeSSAtrees on MICO sources as requested in: [tree-ssa] Merge status 2004-05-03
  - From: Diego Novillo

References:
- Re: Compilation performance comparison of 3.5.0 and TreeSSA treeson MICO sources as requested in: [tree-ssa] Merge status 2004-05-03
  - From: Diego Novillo

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