[wwwdocs] Mention tree-ssa merge

[Gerald Pfeifer]

On Wed, 15 Sep 2004, Steven Bosscher wrote:
> ===================================================================
> RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-4.0/changes.html,v
>
> ! <p>The <a href="http://gcc.gnu.org/projects/tree-ssa/">tree SSA</a>

Please use a relative link here, so that users of our mirrors (notably
www.gnu.org) will remain on that respective site.  I suggest to use
the "tree-ssa" name for the branch, which was most commonly used, but
that's just a weak suggestion.

> ! branch has been merged. This merge has brought in a completely
> ! new optimization framework based on a higher level intermediate
> !         representation than the existing RTL representation.  Numerous
> ! new code transformations based on the new framework are available
> !         in GCC 4.0, including:</p>

Interesting formatting. ;-)

Looks fine; thanks for writing this up!

Gerald