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Re: [tree-ssa] Lazy updating of stmt operands
- From: Chris Lattner <sabre at nondot dot org>
- To: law at redhat dot com
- 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 15:16:39 -0600 (CST)
- Subject: Re: [tree-ssa] Lazy updating of stmt operands
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.
-Chris
--
http://llvm.cs.uiuc.edu/
http://www.nondot.org/~sabre/Projects/