[Mlir-commits] [mlir] [mlir][vector] Separate multi_reduce lowering into transformations, flattening, and unrolling. (PR #178974)

[Jakub Kuderski]

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@@ -485,6 +539,328 @@ struct OneDimMultiReductionToTwoDim
   }
 };
 
+/// Unrolls vector.multi_reduction when the outermost dimension is the only
+/// reduction dimension. Transforms to elementwise arithmetic operations.
+///
+/// Example:
+///
+/// ```mlir
+/// %res = vector.multi_reduction <add> %src, %acc [0]
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kuhar wrote:

Is `[0]` outermost or innermost?

https://github.com/llvm/llvm-project/pull/178974