[cfe-dev] Traversing a function body for call expressions. How ?

[Manasij Mukherjee]

Hi,
Here is my code, sorry for the delay.

class FunctionBodyVisitor : public clang::StmtVisitor<FunctionBodyVisitor> {
public:
  void VisitCallExpr(clang::CallExpr* Expr) {
    llvm::outs() << Expr->getCalleeDecl()->getAsFunction()->getName() << "\n";
    //this is never called
  }
};

class DummyVisitor : public clang::RecursiveASTVisitor<DummyVisitor> {
public:
  bool VisitFunctionDecl(clang::FunctionDecl* Decl) {
    llvm::outs() << Decl->getName() << "\n"; // this part visibly works
    stmtVisitor.Visit(Decl->getBody());
    return true;
  }
private:
  FunctionBodyVisitor stmtVisitor;
};

The code on which this is called is:
void foo()
{

}
int main()
{
    foo(); // I want to get to this call expression
}

Manasij


On Sat, Dec 6, 2014 at 8:18 AM, Gabor Kozar <kozargabor at gmail.com> wrote:
> Hi,
>
> It should work. Define an StmtVisitor subclass, provide a VisitCallExpr.
> Then in your Visitor::VisitFunctionDecl, construct an StmtVisitor object,
> then call its Visit method with the function's body.
>
> In the future, please also provide source code, to allow us to spot any bugs
> and problems in your code (e.g. you may believe that the code does what you
> say it does, but you might have a bug, etc.).
>
> ---
> Best regards,
>
> Gábor 'ShdNx' Kozár
> http://gaborkozar.me
>
>
>
> On Wed, Dec 3, 2014, at 07:11, Manasij Mukherjee wrote:
>
> Hi,
> In a RecursiveASTVisitor implementation, I implement VisitFunctionDecl.
> Now, from the FunctionDecl I have, I can call getBody and get a Stmt.
>
> How can I visit all the functions this function calls ?
> I have tried creating a StmtVisitor and ..err..defining VisitCallExpr !
> That didn't work.
>
> Can anyone point me to what I should be doing ?
>
> Manasij Mukherjee
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