[RFC] Mixed results with O(1) PHI arg lookup

[Jeffrey A Law]

On Sun, 2004-11-07 at 15:15 +0200, Dorit Naishlos wrote:
> 
> 
> 
> > The patch survived a bootstrap, but it should not pass testsuite
> > because I have not fixed a part of tree_vectorizer.c that directly
> > writes PHI_ARG_EDGE.
> 
> The code that directly writes PHI_ARG_EDGE in the vectorizer will go away
> once this patch is installed:
> http://gcc.gnu.org/ml/gcc-patches/2004-11/msg00283.html
Is there any way we can break out those changes?  I'm certainly not
qualified to review that entire changeset, but I might be inclined
to take the time to understand a more localized change.

jeff