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[WIP] Add support for multi-store producer-consumer fusion #2

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[WIP] Add support for multi-store producer-consumer fusion #2

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19 changes: 11 additions & 8 deletions mlir/include/mlir/Transforms/LoopFusionUtils.h
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Original file line number Diff line number Diff line change
Expand Up @@ -50,11 +50,9 @@ struct FusionStrategy {
None, // Generic fusion. No assumtions are made.
ProducerConsumer, // Producer-consumer fusion from AffineLoopFusion pass.
Sibling // Sibling fusion from AffineLoopFusion pass.
} strategy;
} value;

Value memref;
FusionStrategy(StrategyEnum strategy, Value memref)
: strategy(strategy), memref(memref) {}
FusionStrategy(StrategyEnum value) : value(value) {}
};

/// Checks the feasibility of fusing the loop nest rooted at 'srcForOp' into the
Expand All @@ -65,10 +63,10 @@ struct FusionStrategy {
/// NOTE: This function is not feature complete and should only be used in
/// testing.
/// TODO: Update comments when this function is fully implemented.
FusionResult
canFuseLoops(AffineForOp srcForOp, AffineForOp dstForOp, unsigned dstLoopDepth,
ComputationSliceState *srcSlice,
FusionStrategy fusionStrategy = {FusionStrategy::None, Value()});
FusionResult canFuseLoops(AffineForOp srcForOp, AffineForOp dstForOp,
unsigned dstLoopDepth,
ComputationSliceState *srcSlice,
FusionStrategy fusionStrategy = FusionStrategy::None);

/// Fuses 'srcForOp' into 'dstForOp' with destination loop block insertion point
/// and source slice loop bounds specified in 'srcSlice'.
Expand Down Expand Up @@ -112,6 +110,11 @@ bool getFusionComputeCost(AffineForOp srcForOp, LoopNestStats &srcStats,
const ComputationSliceState &slice,
int64_t *computeCost);

// TODO.
void gatherProducerConsumerMemrefs(ArrayRef<Operation *> srcOps,
ArrayRef<Operation *> dstOps,
DenseSet<Value> &producerConsumerMemrefs);

} // end namespace mlir

#endif // MLIR_TRANSFORMS_LOOP_FUSION_UTILS_H
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