[LLVMdev] 64-bit Attributes?

[Duncan Sands]

Hi Kostya,

> Today, llvm/Attributes.h defines 'Attributes' as 'unsigned'.
> This bit vector is fully packed, and I am probably not the only one who wants to
> add bits to it.
> Is there a strong reason not to define Attributes as uint64_t?
> At first glance this seems doable, and the IR reader/writer will not need to be
> changed at all (or at least, not significantly).

probably attributes should become a (pointer to) a more complicated data
structure.  For example, I would like to get rid of the zext/sext parameter
attributes and replace with "z/sexted_from(type)" where type is an arbitrary
integer type.  This will never fit into 64 bits.  Maybe now is the time to
think of a more powerful representation for attributes.

Ciao, Duncan.