[Mlir-commits] [mlir] [mlir][scf] Extend fuse producer to multi-level candidates case (PR #97803)

[llvmlistbot at llvm.org]

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@@ -949,6 +949,145 @@ mlir::scf::tileAndFuseProducerOfSlice(
                                            tileAndFuseResult->tiledOps};
 }
 
+/// Get the real producer from candidate ExtractSliceOp
+///
+/// ```
+/// %0 = producer
+/// %1 = scf.for(%arg1 = %0)
+///   %2 = extract %arg1
+///   %3 = scf.for(%arg2 = %2)
+///      %4 = extract %args2
+///      ...
+/// ```
+///
+/// @param candidateSliceOp: %4 = extract %args2
+/// @param backwardSlice: in-out parameter populated by backward extractSliceOps
+/// @return OpResult Producer : %0 = producer
+static FailureOr<OpResult> getRealProducerFromExtractSliceOp(
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MaheshRavishankar wrote:

Instead of doing this, would it help if you just folded the `extract_slices` using something like [this](https://github.com/iree-org/llvm-project/blob/c9f6518f742c88bda309d5331e0a5d4664387f94/mlir/lib/Dialect/Tensor/Transforms/MergeConsecutiveInsertExtractSlicePatterns.cpp#L23) pattern

https://github.com/llvm/llvm-project/pull/97803