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Re: Minor SSA cleanups
- To: Richard Henderson <rth at redhat dot com>
- Subject: Re: Minor SSA cleanups
- From: Daniel Berlin <dan at www dot cgsoftware dot com>
- Date: Sat, 23 Jun 2001 15:40:32 -0400 (EDT)
- cc: <law at redhat dot com>, <gcc-patches at gcc dot gnu dot org>
On Sat, 23 Jun 2001, Richard Henderson wrote:
> On Fri, Jun 22, 2001 at 11:40:08PM -0400, Daniel Berlin wrote:
> > Yes, yes, I know, I was just not completely awake when i wrote that.
> > However, GVN is doing a DFS over the SCC's of the graph. It's just
> > another thing to worry about to keep track of where the new definition is
> > coming from (if it's different than the old defintiion),
>
> Um, you must still not be awake. When is an optimization going
> to change the dominance frontier on purpose? Why would it want
> to do so?
Won't it change teh dominance frontier if we end up renaming registers and
switching edges definitions come from?
>
>
> r~
>