[Mlir-commits] [mlir] [mlir][GPU] Add `RecursiveMemoryEffects` to `gpu.launch` (PR #75315)

[Guray Ozen]

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@@ -227,3 +243,20 @@ func.func @make_subgroup_reduce_uniform() {
   }
   return
 }
+
+// -----
+
+// The GPU kernel does not have any side effecting ops, so the entire
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grypp wrote:

I'm not very familiar with `RecursiveMemoryEffects`, what exactly it does?

Is it safe with `managed memory` or `unified memory`? In these cases, a pointer address between gpu and cpu remains the same. Once can imagine there is a `llvm.ptr` and it can used to build memref descriptor. It can be used inside `gpu.launch` body, or something else, is it safe in these cases?


https://github.com/llvm/llvm-project/pull/75315