[LLVMdev] Explanation

[John McCall]

On Jun 6, 2011, at 10:05 AM, Renato Golin wrote:
> On 6 June 2011 17:08, George Baah <georgebaah at gmail.com> wrote:
>> if(T == Type::getInt1PtrTy(Context, AS)) ...
> 
> You don't need to care about address spaces to check for an int32*:
> 
> if (T->isPointerTy()) {
>  const Type* intT = cast<PointerType>(T)->getElementType();
>  if (intT->isIntegerTy() && intT->getPrimitiveSizeInBits() == 32)
>    cout << "Yeah!" << endl;
> }

The more idiomatic way would be:
  if (const PointerType *Ptr = dyn_cast<PointerType>(T))
    if (Ptr->getElementType()->isIntegerTy(32))
      cout << "Yeah!" << endl;

John.