[llvm-dev] Retrieving the name of a indirect virtual method call in LLVM pass

[via llvm-dev]

Hi,

 

I have been implementing a CallGraphSCCPass that analyzes each function
invocation. Direct calls are not a problem, but currently I also need to
retrieve the name of the function in the case of virtual method calls. For
example:

 

struct A {

    A() {}

    virtual foo() {}

    virtual ~A() {}

};

 

int main() {

    A* a = new A;

    a->foo();

}

 

In the pass, I can determine the name of the indirect call by using
CallInst::getCalledValue(), but that doesn't give any information on the
actual method that is being called, which should be foo(). The only "name" I
can get is the type of the class, in which this case is class.A.

 

Is there any way I can get the name of the virtual method (foo) that is
being invoked? It isn't in the bitcode except for when it is defined. I
tried taking a look at the whole-program-devirt source but can't find where
they are actually finding the names of the functions when building the
virtual tables for each class.

 

I would greatly appreciate any help on this and if it is possible at all.

 

Thanks,

 

Ben Fu 

 

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