| commit | c873e5f87d84bab700a297af8cdb76b2bd3ece88 | [log] [tgz] |
|---|---|---|
| author | MaheshRavishankar <1663364+MaheshRavishankar@users.noreply.github.com> | Wed Jun 25 11:54:38 2025 -0700 |
| committer | GitHub <noreply@github.com> | Wed Jun 25 11:54:38 2025 -0700 |
| tree | cb3ab8311209135ad9fbc26668fddac34d71b8c5 | |
| parent | 28f6f870617fa327bd7bc87eb32c70571c8233aa [diff] |
[mlir][TilingInterface] Handle multi operand consumer fusion. (#145193)
For consumer fusion cases of this form
```
%0:2 = scf.forall .. shared_outs(%arg0 = ..., %arg0 = ...) {
tensor.parallel_insert_slice ... into %arg0
tensor.parallel_insert_slice ... into %arg1
}
%1 = linalg.generic ... ins(%0#0, %0#1)
```
the current consumer fusion that handles one slice at a time cannot fuse
the consumer into the loop, since fusing along one slice will create and
SSA violation on the other use from the `scf.forall`. The solution is to
allow consumer fusion to allow considering multiple slices at once. This
PR changes the `TilingInterface` methods related to consumer fusion,
i.e.
- `getTiledImplementationFromOperandTile`
- `getIterationDomainFromOperandTile`
to allow fusion while considering multiple operands. It is upto the
`TilingInterface` implementation to return an error if a list of tiles
of the operands cannot result in a consistent implementation of the
tiled operation.
The Linalg operation implementation of `TilingInterface` has been
modified to account for these changes and allow cases where operand
tiles that can result in a consistent tiling implementation are handled.
---------
Signed-off-by: MaheshRavishankar <mahesh.ravishankar@gmail.com>
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