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Re: What to remove after tree-ssa is merged?
- From: Paul Brook <paul at codesourcery dot com>
- To: "S. Bosscher" <S dot Bosscher at student dot tudelft dot nl>,"'kenner at vlsi1 dot ultra dot nyu dot edu '" <kenner at vlsi1 dot ultra dot nyu dot edu>,"'paolo dot bonzini at polimi dot it '" <paolo dot bonzini at polimi dot it>
- Cc: "'gcc at gcc dot gnu dot org '" <gcc at gcc dot gnu dot org>
- Date: Wed, 4 Feb 2004 13:49:23 +0000
- Subject: Re: What to remove after tree-ssa is merged?
- Organization: CodeSourcery
- References: <4195D82C2DB1D211B9910008C7C9B06F01F3741E@lr0nt3.lr.tudelft.nl>
On Wednesday 04 February 2004 1:26 pm, S. Bosscher wrote:
> It is not required for Ada right now because Ada doesn't work
> with tree-ssa anyway. And if it will, then we'll have to see
> how to fit in the thing that PLACEHOLDER_EXPR is for now. I
> don't know what it is used for at present, but there has to be
> a way (or there will have to be) to express the same thing in
> GIMPLE.
I think it's worth explicity pointing out that PLACEHOLDER_EXPR doesn't work
on tree-ssa anyway. I don't see how removing it effects ada as it would need
to be reimplemented anyway when ada moves to tree-ssa.
To put it annother way: there's no way to tell if we break it, so it's not
going to get fixed. Hence we may as well remove it.
If you really think the existing remnants are important then that's what we
have CVS history for.
Paul