tree 8bc2435959bf8f55f717a9e7052aa85c4a5b427a
parent 94170e7295ba6de3340e304b6f20c7fc9785296d
author Vivian Zhang <zhyuhang88@gmail.com> 1775673811 -0700
committer GitHub <noreply@github.com> 1775673811 -0700
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[DispatchCreation] Skip collapse for scatter-like generics with tensor.extract (#24034)

Skip collapsing `linalg.generic` ops that contain both tensor.extract
and linalg.index operations. These are strided scatter patterns
(produced by
[ConvertStridedInsertSliceToGeneric](https://github.com/iree-org/iree/pull/23990))
where 1D collapse introduces expensive delinearization (div/mod chains)
on the extract indices, causing ~3.8x regression. Keeping the
multi-dimensional iteration space allows direct workgroup tiling without
delinearization.

ci-extra: test_torch

Signed-off-by: yzhang93 <zhyuhang88@gmail.com>