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[mlir][linalg] Allow fusing reshapes with nonparallel operands #130148

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Merged
merged 2 commits into from
Mar 7, 2025
Merged

[mlir][linalg] Allow fusing reshapes with nonparallel operands #130148

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f31cf5a
[mlir][linalg] Allow fusing reshapes with parallel operands
IanWood1 Mar 7, 2025
0201daa
Add test to check reduction reshape fusion
IanWood1 Mar 7, 2025
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7 changes: 1 addition & 6 deletions mlir/lib/Dialect/Linalg/Transforms/ElementwiseOpFusion.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -566,7 +566,6 @@ static bool isFusableWithReshapeByDimExpansion(LinalgOp linalgOp,
// - All the indexing maps for operands and results are projected
// permutations.
// - The fused tensor is not a scalar.
// - All the loops for the reshaped operand are parallel loops.
SmallVector<utils::IteratorType> iteratorTypes =
linalgOp.getIteratorTypesArray();
AffineMap operandMap = linalgOp.getMatchingIndexingMap(fusableOpOperand);
Expand All @@ -577,11 +576,7 @@ static bool isFusableWithReshapeByDimExpansion(LinalgOp linalgOp,
.getValue()
.isProjectedPermutation();
}) &&
operandMap.getNumResults() > 0 &&
llvm::all_of(operandMap.getResults(), [&](AffineExpr expr) {
return isParallelIterator(
iteratorTypes[cast<AffineDimExpr>(expr).getPosition()]);
});
operandMap.getNumResults() > 0;
}

namespace {
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