[Mlir-commits] [mlir] [MLIR][XeGPU] Add anchor_layout and update propagation to honor user-specified layouts (PR #169267)

[Artem Kroviakov]

================
@@ -664,27 +730,39 @@ def XeGPU_PrefetchOp : XeGPU_Op<"prefetch", []> {
     As compared to prefetch_nd, which works on non-scattered TensorDesc,
     it works on scattered TensorDesc instead.
 
+    This operation serves as an anchor through which users assign a layout attribute
+    to govern computation distribution.
+
     Arguments:
+
     - `source`: represents the memory region to be loaded from, which can be either a
         tensor_desc or a 1D memref or pointer (ui64, ui32, i64 or i32).
         In case of tensor_desc, offsets come from the producer create_tdesc op.
-        tensor_desc cannot be used in SIMT mode.
+        tensor_desc cannot be used at lane level.
+
     - `offsets`: represents offsets from source. required if `source` in not a TensorDescType.
----------------
akroviakov wrote:

```suggestion
    - `offsets`: represents offsets from source. required if `source` is not a TensorDescType.
```

https://github.com/llvm/llvm-project/pull/169267