[LLVMdev] Get the call graph SCCs from a function pass

Nick Johnson nicholas.paul.johnson at gmail.com
Sun May 10 11:18:51 PDT 2009

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


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