[Mlir-commits] [mlir] Memref prefetch side effect (PR #151261)

[Alexandre Eichenberger]

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@@ -1351,7 +1351,8 @@ def MemRef_PrefetchOp : MemRef_Op<"prefetch"> {
     instruction cache.
   }];
 
-  let arguments = (ins AnyMemRef:$memref, Variadic<Index>:$indices,
+  let arguments = (ins Arg<AnyMemRef, "prefetch address", [MemWrite]> :$memref,
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AlexandreEichenberger wrote:

Good suggestion, will add a comment. It's basically to ensure that dead-code analysis does not remove the operation. It is inline with making that operation a "volatile" so that it remains in place with respect to the other load/store of the prefetched data. 

https://github.com/llvm/llvm-project/pull/151261