Start of guide to writing optimizations for gcc

[Daniel Berlin]

I put the start of a guide to writing optimizations for gcc at

http://www.dberlin.org/gccopt

I know it's currently trivial, but i only work on it during very spare
time.

It is not intended to be an intro for beginners to compiler optimization.
It is intended to describe to someone who understands compiler
optimizations, and works on other compilers, how to do things they want to
do, in gcc.

The docbook source for it is at
http://www.dberlin.org/gccopt/optimize.sgml (it's really an xml file,
however).

Feel free to write a few lines, or whatever, and send it to me. I'll
happily integrate it and add your name to the list of contributors.  If
you don't do docbook, that's okay, just send me the text, and i'll mark it
up for you.

While i'm happy to take contributions, please don't send me gripes or
complaints. I'm quite aware it sucks right now.  It's a start.
Contribute, and maybe it  won't suck anymore.
--Dan