[LLVMdev] Inserting a varargs function declaration with getOrInsertFunction()?

Scott Ricketts sricketts at maxentric.com
Fri Apr 23 17:26:01 PDT 2010

On Fri, Apr 23, 2010 at 4:42 PM, Patrick Alexander Simmons
<simmon12 at cs.uiuc.edu> wrote:
> I need to insert a varargs function declaration from within an LLVM
> pass.  getOrInsertFunction() allows an arbitrary list of type parameters
> for function arguments to be passed in, but as far as I can tell there
> is no LLVM "type" to represent the variable-length portion of a function
> argument list.  How is this normally done?

I am not sure how it is normally done, but I have used
getOrInsertFunction to insert function calls with variable arguments
and FunctionType::get to build my function type. Check out
DerivedTypes.h and look at the get methods (there are options with
isVarArg as a parameter).


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