[LLVMdev] Getting the pointer type from a Load/Store SDNode

[Chris Lattner]

On Wed, 21 Nov 2007, Christopher Lamb wrote:
> I'm digging into this, but I'd like to know if it's feasible to get to the 
> pointer type from a Load/Store SDNode? This would relieve me from having to 
> put the address space information into those SDNodes.
>
> Is Load/StoreSDNode->getSrcValue()->getType() going to do what I want? 
> If not, I can't see another way of getting to the pointer type.

Hrm, the codegen has a couple of interesting crazy issues.  For example, 
it thinks there is a current PointerTy() that is always valid.

I see a couple ways to handle this.  One is to require that the targets 
custom expand the load/store to alternate address space at SDISel time. 
This way they could do any crazy thing they want, including lowering them 
into intrinsics, etc.

-Chris

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