[Mlir-commits] [mlir] [MLIR][XeGPU] Add support for elementwise ops in Wg to Sg distribute pass [1/N] (PR #142797)

[Chao Chen]

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@@ -328,6 +331,63 @@ struct WgToSgPrefetchNdOp : public OpConversionPattern<xegpu::PrefetchNdOp> {
   }
 };
 
+// This pattern transforms elementwise ops in math/arith dialect
+struct WgToSgElementwiseOp : public ConversionPattern {
+  WgToSgElementwiseOp(MLIRContext *ctx)
+      : ConversionPattern(MatchAnyOpTypeTag(), /*benefit=*/1, ctx) {}
+
+  LogicalResult
+  matchAndRewrite(Operation *op, ArrayRef<ValueRange> operands,
+                  ConversionPatternRewriter &rewriter) const override {
+    // Only match ops with elementwise trait and single result.
+    if (!OpTrait::hasElementwiseMappableTraits(op) || op->getNumResults() != 1)
+      return failure();
+
+    auto resultType = dyn_cast<VectorType>(op->getResult(0).getType());
----------------
chencha3 wrote:

maybe there is a need to check whether resultType is null. I remember some ops work on scalars. Could you help to double check?

https://github.com/llvm/llvm-project/pull/142797