[LLVMdev] Evaluation of offsetof() macro

[Vadim Chugunov]

> Do you start from offsetof() or the expanded form? For various reasons,
> it is normally defined to use __builtin_offsetof, since the problems you
> have run into also stop the "legacy" C version from being appropoiate
> for C++ as it doesn't create an ICE.
>

I start with a macro, but I was considering expanding it to pointer
arithmetic, to avoid creating special operators such as
__builtin_offsetof.   Would that be considered a bad idea?
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