Re: Yet another tree question

[Benedetto Proietti <benedetto dot proietti at tiscalinet dot it>]

Hi David,
...

David Dolan wrote:
> 
> Hello,
> 
> First, I would like to thank everyone who has helped me thus far, I really
> appreciate it.
> 
> Now here comes the good part :)
> 
> Basically, the situation I'm in is this: I'm working on a research project
> doing data dependency analysis.  We want to use GCC to help us with this
> task.  This is the first time I have ever done anything related to
> compilers, so I'm learning as I go.  Now, what we really want to do is use
> the GCC tree structure to do our analysis on (basically, take the tree
> before it is put into RTL form and work with that).  My job is to determine
> the structure of the tree (and also if it is actually what we need).

Don't know anything more what people already told you!

 
> Now, the problem is, I am only a summer intern.  Since the summer is waning
> away, so is my job.  This leaves me with not enough time to wade through
> 1,000's of lines of code to find what I need.  Which brings me to my
> question...Tim Josling provided me with his documentation on interfacing the
> tree structure.  Thanks Tim, but I guess what I'm really looking for is
> something more along the lines of "a declaration node is of the form..."
> documentation.

Try to take a look to the Sage++ project:
http://www.extreme.indiana.edu/sage/

It is a source code manipulator: it parses C++ code into a tree
representation,
with classes to navigate through it.
You can add or modify code, ie. to unroll loop or to do your data
dependency analysis; then you unparse the tree back into C++ code that
you can give to GCC.

The project *seems* to be not manteined but the is some documentation.
We are starting using it to encapsulate language extensions for a
parallel machine so to limit extensions to gcc, and also, of course, for
optimizations.


> I'm sorry to be such a slacker, and if you don't want to help me on that
> principle alone, that's fine, I can understand that.  But, if anyone knows
> if something like this exists, you would be a life-saver :)  Conversely, if
> anyone knows that nothing like this exists, please let me know.
> 
> Thanks for enduring my email!!  And for your help!!!!

> Dave Dolan
> ddolan@andrew.cmu.edu


Come on, keep trying !!
...and good luck!

Benedetto Proietti
INFN - APE
benedetto.proietti@roma1.infn.it