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Re: [tree-ssa] Lazy updating of stmt operands
- From: law at redhat dot com
- To: Chris Lattner <sabre at nondot dot org>
- Cc: Zdenek Dvorak <rakdver at atrey dot karlin dot mff dot cuni dot cz>, gcc at gcc dot gnu dot org
- Date: Thu, 11 Dec 2003 20:09:46 -0700
- Subject: Re: [tree-ssa] Lazy updating of stmt operands
- Reply-to: law at redhat dot com
In message <Pine.LNX.4.44.0312111514190.2582-100000@nondot.org>, Chris Lattner
writes:
>
>Jeff Law wrote:
>
>> While it's nice to think about a world where you always have immediate
>> uses, you end up with FUD chains if you do that -- with ultimately a
>> tangled nest of pointers that is bloody impossible to work with in the
>> real world.
>
>Uh, no. Here's a counter-example:
>http://llvm.cs.uiuc.edu/
>
>Having efficient, transparently & efficiently updated immediate use
>information is extremely valuable for a wide variety of optimizations.
OK. Maybe it was just Diego implementation that was an unmaintainable
mess :-)
jeff