| 1 | //===- ReducePatternInterface.h - Collecting Reduce Patterns ----*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #ifndef MLIR_REDUCER_REDUCTIONPATTERNINTERFACE_H |
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| 10 | #define MLIR_REDUCER_REDUCTIONPATTERNINTERFACE_H |
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| 11 | |
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| 12 | #include "mlir/IR/DialectInterface.h" |
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| 13 | |
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| 14 | namespace mlir { |
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| 15 | |
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| 16 | class RewritePatternSet; |
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| 17 | |
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| 18 | /// This is used to report the reduction patterns for a Dialect. While using |
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| 19 | /// mlir-reduce to reduce a module, we may want to transform certain cases into |
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| 20 | /// simpler forms by applying certain rewrite patterns. Implement the |
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| 21 | /// `populateReductionPatterns` to report those patterns by adding them to the |
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| 22 | /// RewritePatternSet. |
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| 23 | /// |
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| 24 | /// Example: |
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| 25 | /// MyDialectReductionPattern::populateReductionPatterns( |
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| 26 | /// RewritePatternSet &patterns) { |
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| 27 | /// patterns.add<TensorOpReduction>(patterns.getContext()); |
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| 28 | /// } |
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| 29 | /// |
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| 30 | /// For DRR, mlir-tblgen will generate a helper function |
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| 31 | /// `populateWithGenerated` which has the same signature therefore you can |
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| 32 | /// delegate to the helper function as well. |
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| 33 | /// |
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| 34 | /// Example: |
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| 35 | /// MyDialectReductionPattern::populateReductionPatterns( |
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| 36 | /// RewritePatternSet &patterns) { |
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| 37 | /// // Include the autogen file somewhere above. |
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| 38 | /// populateWithGenerated(patterns); |
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| 39 | /// } |
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| 40 | class DialectReductionPatternInterface |
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| 41 | : public DialectInterface::Base<DialectReductionPatternInterface> { |
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| 42 | public: |
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| 43 | /// Patterns provided here are intended to transform operations from a complex |
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| 44 | /// form to a simpler form, without breaking the semantics of the program |
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| 45 | /// being reduced. For example, you may want to replace the |
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| 46 | /// tensor<?xindex> with a known rank and type, e.g. tensor<1xi32>, or |
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| 47 | /// replacing an operation with a constant. |
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| 48 | virtual void populateReductionPatterns(RewritePatternSet &patterns) const = 0; |
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| 49 | |
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| 50 | protected: |
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| 51 | DialectReductionPatternInterface(Dialect *dialect) : Base(dialect) {} |
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| 52 | }; |
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| 53 | |
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| 54 | } // namespace mlir |
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| 55 | |
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| 56 | #endif // MLIR_REDUCER_REDUCTIONPATTERNINTERFACE_H |
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| 57 | |
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