| 1 | //===- AffineExpandIndexOps.cpp - Affine expand index ops pass ------------===// |
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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 | // This file implements a pass to expand affine index ops into one or more more |
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| 10 | // fundamental operations. |
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| 11 | //===----------------------------------------------------------------------===// |
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| 12 | |
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| 13 | #include "mlir/Dialect/Affine/Passes.h" |
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| 14 | |
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| 15 | #include "mlir/Dialect/Affine/IR/AffineOps.h" |
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| 16 | #include "mlir/Dialect/Affine/Transforms/Transforms.h" |
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| 17 | #include "mlir/Dialect/Affine/Utils.h" |
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| 18 | #include "mlir/Transforms/GreedyPatternRewriteDriver.h" |
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| 19 | |
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| 20 | namespace mlir { |
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| 21 | namespace affine { |
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| 22 | #define GEN_PASS_DEF_AFFINEEXPANDINDEXOPS |
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| 23 | #include "mlir/Dialect/Affine/Passes.h.inc" |
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| 24 | } // namespace affine |
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| 25 | } // namespace mlir |
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| 26 | |
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| 27 | using namespace mlir; |
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| 28 | using namespace mlir::affine; |
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| 29 | |
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| 30 | namespace { |
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| 31 | /// Lowers `affine.delinearize_index` into a sequence of division and remainder |
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| 32 | /// operations. |
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| 33 | struct LowerDelinearizeIndexOps |
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| 34 | : public OpRewritePattern<AffineDelinearizeIndexOp> { |
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| 35 | using OpRewritePattern<AffineDelinearizeIndexOp>::OpRewritePattern; |
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| 36 | LogicalResult matchAndRewrite(AffineDelinearizeIndexOp op, |
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| 37 | PatternRewriter &rewriter) const override { |
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| 38 | FailureOr<SmallVector<Value>> multiIndex = |
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| 39 | delinearizeIndex(rewriter, op->getLoc(), op.getLinearIndex(), |
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| 40 | llvm::to_vector(op.getBasis())); |
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| 41 | if (failed(multiIndex)) |
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| 42 | return failure(); |
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| 43 | rewriter.replaceOp(op, *multiIndex); |
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| 44 | return success(); |
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| 45 | } |
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| 46 | }; |
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| 47 | |
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| 48 | class ExpandAffineIndexOpsPass |
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| 49 | : public affine::impl::AffineExpandIndexOpsBase<ExpandAffineIndexOpsPass> { |
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| 50 | public: |
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| 51 | ExpandAffineIndexOpsPass() = default; |
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| 52 | |
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| 53 | void runOnOperation() override { |
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| 54 | MLIRContext *context = &getContext(); |
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| 55 | RewritePatternSet patterns(context); |
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| 56 | populateAffineExpandIndexOpsPatterns(patterns); |
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| 57 | if (failed( |
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| 58 | applyPatternsAndFoldGreedily(getOperation(), std::move(patterns)))) |
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| 59 | return signalPassFailure(); |
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| 60 | } |
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| 61 | }; |
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| 62 | |
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| 63 | } // namespace |
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| 64 | |
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| 65 | void mlir::affine::populateAffineExpandIndexOpsPatterns( |
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| 66 | RewritePatternSet &patterns) { |
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| 67 | patterns.insert<LowerDelinearizeIndexOps>(arg: patterns.getContext()); |
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| 68 | } |
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| 69 | |
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| 70 | std::unique_ptr<Pass> mlir::affine::createAffineExpandIndexOpsPass() { |
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| 71 | return std::make_unique<ExpandAffineIndexOpsPass>(); |
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| 72 | } |
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| 73 | |
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