[LLVMdev] Porting to System z

[Florian Weimer]

* Neale Ferguson:

> So the SimpleTy variable which is a SimpleTypeValue is behaving strangely.
> It's found within a private definition:
>
>     union {
>       uintptr_t V;
>       SimpleValueType SimpleTy;
>       const Type *LLVMTy;
>     };
>  
> The comment in the above fix indicates that in this 64-bit system the enum
> needs to be 64-bits is correct, but the fix doesn't seem to do it.

What's the union being used for?  I wouldn't be surprised if this is
pushing into undefined territory.