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Re: [RFC] Contributing tree-ssa to mainline

From: David Edelsohn <dje at watson dot ibm dot com>
To: Diego Novillo <dnovillo at redhat dot com>
Cc: Roger Sayle <roger at eyesopen dot com>, Steven Bosscher <s dot bosscher at student dot tudelft dot nl>, "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>
Date: Sat, 17 Jan 2004 01:19:01 -0500
Subject: Re: [RFC] Contributing tree-ssa to mainline
References: <Pine.LNX.4.44.0401162047210.22830-100000@www.eyesopen.com> <1074317467.5368.17.camel@frodo.toronto.redhat.com>

	Agreeing with Roger, we don't know how to close the performance
gap using the RTL-only infrastructure, but we do see how an SSA
infrastructure can improve performance.

	Merging Tree-SSA into the trunk for GCC 3.5 does not mean (or
should not mean) merging it and then immediately branching for a release.
We do not need to achieve the release target performance at the point of
the merge.

	If we want to develop a GCC 3.5 release without Tree-SSA, then we
should have specific, non-SSA feature goals that we want to accomplish.
Otherwise, what is the benefit of GCC 3.5 over additional point releases
of GCC 3.4 stable branch?

David

References:
- Re: [RFC] Contributing tree-ssa to mainline
  - From: Roger Sayle
- Re: [RFC] Contributing tree-ssa to mainline
  - From: Diego Novillo

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