Hello:
We are developer-engineers of Appentra Solutions. We are working with
LLVM-3.1 and we have a problem. We think we have found a bug on
CallGraphNode. This is the code we have executed:
virtual void getAnalysisUsage( llvm::AnalysisUsage & info ) const {
info.addRequired<CallGraph>();
...
}
...
virtual bool runOnModule( Module & M )
{
...
CallGraph &CG = this->getAnalysis<CallGraph>();
CallGraphNode *cgn;
unsigned nref;
for(CallGraph::const_iterator I=CG.begin(),E=CG.end();I!=E;I++)
{
cgn=I->second;
if((cgn)&&(cgn->getFunction()))
{
nref=cgn->getNumReferences();
llvm::dbgs()<<"uses:"<<nref<<"\n";
cgn->dump();
}
}
...
}
In a simple program with only one function (Main), this is the output:
uses:0
Call graph node for function: 'main'<<0x7f928340c760>>
#uses=1
We have been searching in llvm files and dump function calls
getNumReferences() (which is in Callgraph.h). And it is assumed that the
call cgn->getNumReferences() references to the same function. Why are we
getting different values? Dump shows uses=1, and cgn->getNumReferences()
shows uses=0;
We are writing a Module pass as you can see in the previous code. We have
this pass registered as:
char PARALLWARE::ID = 0;
static RegisterPass<PARALLWARE> X( "parallware","run
Parallware source to
source autoparallel compiler");
Is this a bug or we are making a mistake?
Thank you for your time.
We wait for your reply. Please, contact us at this e-mail:
eugenio.novas at udc.es.
Best regards.
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