How can I get function name from CallInst in LLVM?

Question

I have an object of type CallInst. How can I get the name of the called function (aka callee). Assume the function is called directly (i.e., no indirect function calls).

Answer 1

StringRef get_function_name(CallInst *call)
{
    Function *fun = call->getCalledFunction();
    if (fun) // thanks @Anton Korobeynikov
        return fun->getName(); // inherited from llvm::Value
    else
        return StringRef("indirect call");
}

anyway, that's what the documentation implies:

• CallInst
  • CallInst::getCalledFunction
• returns Function
• and walk back up the inheritance graph until you see a plausible candidate:
  • Value
  • Value::getName