One question about two passes interaction

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1 
Actually I tried ModulePass. It works exactly as what I expect.But I found another problem. In ModulePass, it not only collects the functions I create, it also treat some system function such as 'printf' as a function. I do not if I does something wrong. The codes I use is as follows:


 virtual bool runOnModule(Module &M) {

    	for (Module::iterator b = M.begin(), be = M.end(); b != be; ++b) {

    		Function *ff = dyn_cast<Function>(b);

    		errs() <<"testff0: "<<funcname_index<<'\n';

    		funcname[funcname_index++] = ff->getName();

    	}

    	return false;

  }

My test source file:

void A(){}

void B(){printf("dada");}

void main(){A(); B();}

The ModulePass output is:

A

B

printf

main

Thanks.

Robert
2

LLVM modules contain declarations of external functions, which are still “functions”.
You can filter these out by checking ff->isDeclaration().

Cheers,
Scott