[tree-ssa/wwwdocs] Add merge announcement

[Diego Novillo <dnovillo at redhat dot com>]

Adds the merge announcement and branch closure.  Verified with
w3.validator.org


Diego.


Index: index.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/projects/tree-ssa/index.html,v
retrieving revision 1.28
diff -d -c -p -r1.28 index.html
*** index.html	30 Dec 2003 18:47:00 -0000	1.28
--- index.html	25 Feb 2004 14:41:40 -0000
***************
*** 9,14 ****
--- 9,15 ----
  <h2>Table of Contents</h2>
  
  <ul>
+ <li><a href="#news">Latest news (last updated: 2003-02-25)</a></li>
  <li><a href="#intro">Introduction</a></li>
  <li><a href="#documentation">Documentation</a></li>
  <li><a href="#contributing">Contributing</a></li>
***************
*** 22,27 ****
--- 23,40 ----
  </ul>
  
  <hr />
+ <h2><a name="news">Latest News</a></h2>
+ 
+ <p>The branch will be merged into mainline to become part of the next
+ release of GCC.  As such, the branch is now <em>closed</em> to new
+ development.</p>
+ 
+ <p>The stabilization process will be driven by the merge criteria
+ stated in <a
+ href="http://gcc.gnu.org/ml/gcc/2004-02/msg01294.html";>http://gcc.gnu.org/ml/gcc/2004-02/msg01294.html</a>.
+ We expect to merge the branch into mainline by mid to late April.</p>
+ 
+ <hr />
  <h3><a name="intro">Introduction</a></h3>
  
  <p>The goal of this project is to build an optimization framework for trees
*************** href="http://people.redhat.com/dnovillo/
*** 57,62 ****
--- 70,78 ----
  documentation</a> for the Tree SSA infrastructure is generated from the
  source code using Doxygen.  The documentation is updated daily.</p>
  
+ <p>Internal design documentation is also available in the texinfo
+ documentation (<code>doc/gccint.info</code> in GCC's build directory).</p>
+ 
  <p>A high-level overview of GENERIC/GIMPLE and the SSA implementation may
  be found in the <a
  href="http://www.linux.org.uk/~ajh/gcc/gccsummit-2003-proceedings.pdf";>
*************** Diego Novillo, Sebastian Pop, Graham Sto
*** 93,139 ****
  <hr />
  <h3><a name="stability">Branch stability</a></h3>
  
! <p>We are currently working on stabilizing the branch to make it
! possible to merge into mainline for the 3.5 release.  The goal is
! very simple: <em>make the branch better than mainline</em>.  For
! details, see the <a href="#shortterm">short term goals</a>
! section.</p>
! 
! <p>Every patch submitted for review must comply with the
! following requirements:</p>
! 
! <ol>
! <li>The patch must be complete, not a work in progress.</li>
! <li>If the patch is too large or depends on other fixes, submit
!     them separately.</li>
! <li>Patches must have been bootstrapped with <em>all</em> the
!     default front ends and regression tested on at least one of
!     the main native architectures against a pristine tree, with
!     <em>no</em> new regressions on any testsuite.</li>
! <li>If the tree changes just before you are about to commit your
!     patch, you <em>must</em> go through the bootstrap and
!     regression test cycle once again.</li>
! </ol>
  
  <p>Patches that break default bootstraps or introduce new
  regressions will be removed (if a fix is not immediately
  obvious).</p>
  
- <p>Also, for new analyses and transformations, please include a
- reference to the paper and/or book where you are getting the
- algorithm from.  If it's your own research work, include a
- Technical Report, Thesis or Paper reference for it.</p>
- 
  <p>There are regular mainline merges about 2 or 3 times a month.  The
  latest merge tag is always added to GCC's version string.  A merge may
  be postponed if there is major breakage in mainline.</p>
  
- <p>Work from the branch will be incorporated into mainline only
- when we can prove improvements in code quality, compile times and
- memory utilization.  We should be able to either replace or
- simplify some of the existing transformations currently done on
- RTL.</p>
- 
  
  <hr />
  <h2><a name="gimple">GENERIC and GIMPLE</a></h2>
--- 109,127 ----
  <hr />
  <h3><a name="stability">Branch stability</a></h3>
  
! <p>Every patch submitted for review must either fix a PR or adress one
! of the issues mentioned in the <a
! href="http://gcc.gnu.org/ml/gcc/2004-02/msg01294.html";>merge criteria
! document</a>.</p>
  
  <p>Patches that break default bootstraps or introduce new
  regressions will be removed (if a fix is not immediately
  obvious).</p>
  
  <p>There are regular mainline merges about 2 or 3 times a month.  The
  latest merge tag is always added to GCC's version string.  A merge may
  be postponed if there is major breakage in mainline.</p>
  
  
  <hr />
  <h2><a name="gimple">GENERIC and GIMPLE</a></h2>
*************** existing DejaGNU testing framework.</p>
*** 303,336 ****
  possible improvement, and planned analyses and optimizations.
  Suggestions for other passes and volunteers to help finish the
  different passes are welcome.</p>
- 
- <h3><a name="shortterm">Short term goals</a></h3>
- 
- <dl>
- <dt><em>Speed up the new infrastructure</em></dt>
- <dd>There are still many things that we can do faster.  The compile time
-     performance of GCC should improve, not degrade.  A lot of work is
-     going on in this area.</dd>
- 
- <dt><em>Fix Bugzilla reports</em></dt>
- <dd>A new Bugzilla category has been created for <a
- href="http://gcc.gnu.org/bugzilla/";>bug reports</a> against the branch
- (search for version <code>tree-ssa</code>).  They should all be fixed or at
- least analyzed to determine whether they are merge blockers.</dd>
- 
- <dt><em>Improve compile time memory utilization</em></dt>
- <dd>We have several memory footprint and locality problems.  Some
- are caused by new data structures that have still not been
- optimized for size, others are caused by the tendency of creating
- many more trees than the mainline compiler.</dd>
- 
- <dt><em>Improve run time performance</em></dt>
- <dd>The quality of generated code has improved, but it still lags
- behind mainline.  We use SPEC CPU2000 and SPEC CPU95 to track
- performance.  Performance results comparing the branch against
- mainline using freely available suites would be most
- welcome.</dd>
- </dl>
  
  <h3>Medium and long term goals</h3>
  
--- 291,296 ----