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Re: tree-ssa status
- From: law at redhat dot com
- To: Zack Weinberg <zack at codesourcery dot com>
- Cc: Diego Novillo <dnovillo at redhat 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: Thu, 27 Feb 2003 15:51:11 -0700
- Subject: Re: tree-ssa status
- Reply-to: law at redhat dot com
In message <87lm015pgo dot fsf at egil dot codesourcery dot com>, Zack Weinberg writes:
>law at redhat dot com writes:
>
>> Also keep in mind the change to carry file/line information in a common
>> location touched a lot of code in basically mindless ways.
>
>That might be a candidate for a separate merge to mainline (he says,
>not having looked at the code at all).
I wouldn't recommend it. The tree-ssa code has very different characteristics
in terms of how file/line information is carried around when compared to
the mainline sources. As a result, the tradeoffs for which scheme is more
memory efficient are very different.
I did the algebra for the mainline a while back and concluded that the scheme
used by tree-ssa won't make sense for the mainline if/until tree-ssa is the
mainline.
Jeff