tree-ssa branch: Call for preliminary testing

[Diego Novillo <dnovillo at redhat dot com>]

I'm looking for volunteers to try out the tree-ssa branch with
their favourite C/C++ code.  Be warned that at this time you
shouldn't expect the branch compiler to be any better than
mainline.  In fact, it will probably be worse.

This call for testing is mostly to gather data that will help
finding the most obvious problems with the branch.  Besides the
obvious correctness issues, I'm mostly concerned with compile and
run time performance.

If you're willing to help, I'd like to know:

- Compile time comparisons vs mainline (-ftime-report or gprof).


- Run time comparisons vs mainline (oprofile or gprof or other
  profilers).
  
  Sometimes it's useful to compare the pretty-printed dumps given
  by -fdump-tree-all.  Particularly, comparing .t05.simple vs
  .t14.optimized shows the difference before and after
  optimization.

  Also, comparing the .00.rtl between the branch and mainline may
  give hints.  Direct comparison on large codes will probably not
  be useful because the branch generates RTL from GIMPLE trees,
  while mainline generates RTL directly from FE trees.


- Correctness.  Does the branch compiler fail or generate
  incorrect code?  Does it fail to bootstrap on your platform?


Thanks.  Diego.