PATCH + test for PR17099.

[Duncan Sands]

Hi Stepan,

> Please find patch + regression test for MergeFunctions pass that fixes PR17099
> issue.

> --- lib/Transforms/IPO/MergeFunctions.cpp	(revision 189742)
> +++ lib/Transforms/IPO/MergeFunctions.cpp	(working copy)
> @@ -738,7 +738,15 @@
>    FunctionType *FFTy = F->getFunctionType();
>    for (Function::arg_iterator AI = NewG->arg_begin(), AE = NewG->arg_end();
>         AI != AE; ++AI) {
> -    Args.push_back(Builder.CreateBitCast(AI, FFTy->getParamType(i)));
> +    Type* Ty1 = AI->getType();
> +    Type* Ty2 = FFTy->getParamType(i);
> +    LLVMContext &Ctx = Ty1->getContext();
> +    if (isa<PointerType>(Ty1) && Ty2 == TD->getIntPtrType(Ctx))
> +      Args.push_back(Builder.CreatePtrToInt(AI, Ty2));
> +    else if (isa<PointerType>(Ty2) && Ty1 == TD->getIntPtrType(Ctx))
> +      Args.push_back(Builder.CreateIntToPtr(AI, Ty2));
> +    else
> +      Args.push_back(Builder.CreateBitCast(AI, Ty2));

you can use CastInst::getCastOpcode, which will produce BitCast, IntToPtr or
PtrToInt as appropriate.

Ciao, Duncan.

>      ++i;
>    }
>