[Mlir-commits] [mlir] [mlir][gpu] Add subgroup_reduce to shuffle lowering (PR #76530)

[Kunwar Grover]

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@@ -139,6 +143,164 @@ struct ScalarizeSingleElementReduce final
   }
 };
 
+/// Emits a subgroup reduction using a sequence of shuffles. Uses the `packFn`
+/// and `unpackFn` to convert to/from the native shuffle type. Assumes that the
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Groverkss wrote:

Can you write more here on what is expected from `pack` and `unpackFn`?

https://github.com/llvm/llvm-project/pull/76530