[LLVMdev] Creating a Return Instruction.

[Nick Lewycky]

Rohith Goparaju wrote:
> Hi all,
>
>     I have to create a return instruction in a function. The function is
> of type -- void * func (void *) . So i have to create a return
> instruction for the function that should return a void pointer. But
> actually the function will not return anything useful . it will be
> something like --  return void * null.  The problem i am facing is to
> create a return instruction the Create function expects a pointer to a
> value and i am not able to do that. How do i create such a return
> instruction.

'void *' is not a valid LLVM type. Did you mean 'i8 *'?

   LLVMContext C;
   const Type *Ty = Type::getInt8Ty(C)->getPointerTo();

'ret i8* null':

   Builder.CreateRet(Constant::getNullValue(Ty));

'ret i8* undef':

   Builder.CreateRet(UndefValue::get(Ty));

Nick