[cfe-dev] Generate the whole program CFG?

Douglas Gregor dgregor at apple.com
Fri Sep 11 07:55:16 PDT 2009

On Sep 11, 2009, at 4:28 AM, zhunan wrote:

> Hi,all
> Since the CFGs generated by clang-cc are for single function,can we
> generate a large CFG for the whole program(we expand the callee's  
> CFG in
> the main function's CFG)?
> 1.Has clang offered this function?

There has been a little bit of work in Clang to provide whole-program  
CFGs. See include/clang/Analysis/CallGraph.h and the "clang-wpa"  
program (in tools/wpa).

> 2.what we should modify?(It seems that ASTs are also for single
> function)

Each ASTContext holds a single translation unit. A program is made up  
of several translation units.

	- Doug

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