I need help about the program flow and overall architehture of gcc

[Mike Stump]

> Date: Wed, 11 Apr 2001 21:36:18 -0700 (PDT)
> From: Ge Zhu <highhearted@yahoo.com>
> To: gcc@gcc.gnu.org

> I am a master student who is working on a project of gcc. We are
> trying to change some source codes of gcc.  What I need to know is
> how gcc works

Well.  If you'd like slightly more information, there is a porting
manual that describes in 500+ page detail many of the details of the
compiler, and if you would like more, we always point people to the
source code, as it has various elaborations on the documentation, and
if you have a specific question that isn't covered by either, we might
be able to answer it here.

> and what will be the program flow or the overall architecture.

In my book that is covered by Passes and Files of the Compiler
chapter, you can read it on the web at:

http://gcc.gnu.org/onlinedocs/gcc_16.html#SEC162
  I
> really need some detailed documents of gcc but not user manual.

The gcc manual is not just a user manual.

> Also, after revising some source codes of gcc, how could I make it
> to test the revised gcc?

make bootstrap && make check.