[Mlir-commits] [mlir] [mlir][SCF] Unify tileUsingFor and tileReductionUsingFor implementation (PR #120115)

[llvmlistbot at llvm.org]

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@@ -85,6 +85,36 @@ struct SCFTilingOptions {
     return *this;
   }
 
+  /// Specify how reduction dimensions should be tiled.
+  ///
+  /// Tiling can be thought of as splitting a dimension into 2 and materializing
+  /// the outer dimension as a loop:
+  ///
+  /// op[original] -> op[original / x, x] -> loop[original] { op[x] }
+  ///
+  /// For parallel dimensions, the split can only happen in one way, with both
+  /// dimensions being parallel. For reduction dimensions however, there is a
+  /// choice in how we split the reduction dimension. This enum exposes this
+  /// choice.
+  enum class ReductionTilingStrategy {
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MaheshRavishankar wrote:

Nice!

https://github.com/llvm/llvm-project/pull/120115