[LLVMdev] Getting the pointer type from a Load/Store SDNode
clattner at apple.com
Sun Nov 25 17:02:27 PST 2007
>> I see a couple ways to handle this. One is to require that the
>> custom expand the load/store to alternate address space at SDISel
>> This way they could do any crazy thing they want, including
>> lowering them
>> into intrinsics, etc.
> Forcing custom lowering for ISD::LOAD/STORE means that you lose lots
> of the information carried along with the Load/StoreSDNode that
> makes writing instruction patterns (particularly the ext/trunc
> predicates) simple.
> Another possibility is to add a utility function to Load/
> StoreSDNodes that returns the address space of the pointer being
> used. For my use I think this way is probably best, though there's
> nothing preventing a target from doing custom lowering.
That sounds fine to me,
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