| Issue |
173316
|
| Summary |
[DirectX] Handle RawBuffer correctly in DXILResourceAccess
|
| Labels |
backend:DirectX
|
| Assignees |
bogner
|
| Reporter |
bogner
|
RawBufferLoad and Store are used in DXIL for both Raw and Structured buffers, but the rules for indexing are slightly different between the two. For raw loads and stores, the entire address must be in the `Index` operand, and the `ElementOffset` should be `undef`, whereas for structured loads and stores `Index` should point to the beginning of one of the structures and `ElementOffset` points into the object.
We need to do a couple of things:
- Update DXILResourceAccess to incorporate GEPs into the `Index` operand for raw accesses
- Update the DXILResource.rst docs to reflect the rules depending on the buffer type
- Update DXILOpLowering to reject `ElementOffset` for raw accesses.
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