[LLVMdev] Trouble traversing the CallGraph

[Gabriel Rodríguez]

I am finding some weird behavior in the CallGraph, and am not sure what am I doing wrong. When trying to traverse nodes 
in the CallGraph I get stuck in nodes representing external functions. Take the following code: 

----- 
#include <stdio.h> 

int main() { 
printf( "Hello World!\n" ); 
} 
----- 

If I try to traverse the CallGraph using the following code: 

----- 
CallGraph CG = this->getAnalysis<CallGraph>(); 
for( CallGraph::const_iterator i = CG.begin(); i != CG.end(); ++i ) { 
CallGraphNode * cgn = i->second; 
for( CallGraphNode::const_iterator ii = cgn->begin(); 
ii != cgn->end(); ++ii ) {} 
} 
----- 

The CallGraphNode::const_iterator is inconsistent. For starters, the inner loop never exits and, besides, if I 
try to use the values contained in the iterator (e.g. ii->second) I get segfaults. Calling CG.dump() works 
flawlessly, but mimicking the code from CG.dump() in my user code produces inconsistent CGN iterators 
again. I am at a loss here, any ideas? 

Best, 
Gabriel 

PS: I have already added the CallGraph analysis to the pass requirements. 
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