[Mlir-commits] [mlir] [mlir][vector] Add alignment attribute to vector operations. (PR #152507)

[Mehdi Amini]

================
@@ -2166,6 +2189,11 @@ def Vector_ScatterOp :
     correspond to those of the `llvm.masked.scatter`
     [intrinsic](https://llvm.org/docs/LangRef.html#llvm-masked-scatter-intrinsics).
 
+    An optional `alignment` attribute allows to specify the byte alignment of the
+    scatter operation. It must be a positive power of 2. The operation must access
+    memory at an address aligned to this boundary. Violations may lead to
+    architecture-specific faults or performance penalties.
----------------
joker-eph wrote:

I think 
> Violating this requirements triggers immediate undefined behavior
seems reasonable for the stores.
For the loads maybe we should instead use:
> Violating this requirements will make the loaded value a poison value.
or something like that.

https://github.com/llvm/llvm-project/pull/152507