[Mlir-commits] [mlir] [mlir][tensor] Fold producer linalg transpose with consumer tensor pack (PR #75658)

[lorenzo chelini]

================
@@ -142,11 +173,48 @@ struct FoldProducerPackWithConsumerLinalgTransposeOp
     return success();
   }
 };
+
+/// Fold 'transpose' -> 'pack' into 'pack' since 'pack' already has transpose
+/// semantics.
+struct FoldConsumerPackWithProducerLinalgTransposeOp
+    : public OpRewritePattern<PackOp> {
+  using OpRewritePattern<PackOp>::OpRewritePattern;
+
+  LogicalResult matchAndRewrite(PackOp packOp,
+                                PatternRewriter &rewriter) const override {
+    auto transposeOp = packOp.getSource().getDefiningOp<linalg::TransposeOp>();
+
+    if (!transposeOp)
+      return failure();
+
+    SmallVector<int64_t> newOuterDimsPermVec;
+    SmallVector<int64_t> newInnerDimsPosVec;
+    SmallVector<OpFoldResult> newMixedInnerTilesVec;
+
+    bool foldingPossible = getRemappedPermutationForTransposeAndPack(
+        packOp, transposeOp, newOuterDimsPermVec, newInnerDimsPosVec,
+        newMixedInnerTilesVec, /*isTransposeProducer*/ true);
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chelini wrote:

nit: /*isTransposeProducer =*/

https://github.com/llvm/llvm-project/pull/75658