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Re: More PRE problems
- From: law at redhat dot com
- To: Daniel Berlin <dberlin at dberlin dot org>
- Cc: gcc at gcc dot gnu dot org
- Date: Mon, 17 Nov 2003 12:26:12 -0700
- Subject: Re: More PRE problems
- Reply-to: law at redhat dot com
In message <Pine.LNX.4.56.0311171133290.23850@dberlin.org>, Daniel Berlin write
s:
>Even when it does remove a loop invariant *computation*, it still leaves a
>temporary there, which might still be loop invariant.
>
>SSAPRE does no actual deletion of statements.
Well, if you think it's valid, then go ahead with your change to have the
self-referring PHI.
I'd like to get closure on this issue since it's preventing a small speedup
fix from being applied to the tree.
jeff