llvm dev - May 2009 - [LLVMdev] Get the call graph SCCs from a function pass

Hello,

I'm writing a Function Pass.  This function pass needs access to the
CallGraph and CallGraph SCCs.  Is there any way I can get CallGraph
information without changing my pass to a CallGraphSCCPass ?

Thanks,
-- 
Nick Johnson

On 2009-05-10 20:11, Nick Johnson wrote:
> Hello,
>
> I'm writing a Function Pass.  This function pass needs access to the
> CallGraph and CallGraph SCCs.  Is there any way I can get CallGraph
> information without changing my pass to a CallGraphSCCPass ?
Does getAnalysis<CallGraph>() work?

But I'm not sure if using a FunctionPass to access Callgraph data is a
good idea, transformations can
change it (for example dead code elimination can remove edges).

Best regards,
--Edwin

On 5/10/09, Török Edwin <edwintorok at gmail.com>
wrote:
> On 2009-05-10 20:11, Nick Johnson wrote:
>  > Hello,
>  >
>  > I'm writing a Function Pass.  This function pass needs access to
the
>  > CallGraph and CallGraph SCCs.  Is there any way I can get CallGraph
>  > information without changing my pass to a CallGraphSCCPass ?
>
>
> Does getAnalysis<CallGraph>() work?
>
AFAIK, it's not a pass.
>  But I'm not sure if using a FunctionPass to access Callgraph data is a
>  good idea, transformations can
>  change it (for example dead code elimination can remove edges).
>
I'm just using it to interpret profiling information correctly; in
that respect, it doesn't matter if transformations change the IR, so
long as the CallGraph data reflects the IR against which profiling was
done.

Nick