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Re: [RFC] Contributing tree-ssa to mainline
- From: kenner at vlsi1 dot ultra dot nyu dot edu (Richard Kenner)
- To: s dot bosscher at student dot tudelft dot nl
- Cc: gcc at gcc dot gnu dot org
- Date: Fri, 16 Jan 04 22:24:08 EST
- Subject: Re: [RFC] Contributing tree-ssa to mainline
Expecting tree-ssa to produce code better by a factor of two is simply
In general, of course. But if it is really allowing new classes of
optimizations to be performed (which was the argument to justify the new
infrastructure), it should be possible to construct test cases that show
that sort of performance improvement (factors of two or more).
Remember that the last time we had the discussion of the timing of tree-ssa,
people claimed it was "essential" for 3.5 since there was a tremendous
improvement on some C++ cases. So let's see those cases.