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Re: [RFC] Contributing tree-ssa to mainline
- From: Steven Bosscher <s dot bosscher at student dot tudelft dot nl>
- To: kenner at vlsi1 dot ultra dot nyu dot edu (Richard Kenner), dnovillo at redhat dot com
- Cc: gcc at gcc dot gnu dot org
- Date: Sat, 17 Jan 2004 04:07:26 +0100
- Subject: Re: [RFC] Contributing tree-ssa to mainline
- References: <10401170230.AA15232@vlsi1.ultra.nyu.edu>
On Saturday 17 January 2004 03:30, Richard Kenner wrote:
> My feeling is that "success" would be in showing at least one class of code
> where we see very significantly better code (at least a factor of two) and
> we see significant (around 10-20%) performance improvement in a larger
> class of test cases.
You must be joking. I've added this beautiful quip to bugzilla:
Moore's Law: "Advances in hardware double computing power every 18 months".
Proebsting's law: "Advances in compiler optimizations double computing
power every 18 years".
Expecting tree-ssa to produce code better by a factor of two is simply
unreasonable.
Gr.
Steven