| 1 | //===- ConvertShapeConstraints.cpp - Conversion of shape constraints ------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #include "mlir/Conversion/ShapeToStandard/ShapeToStandard.h" |
| 10 | |
| 11 | #include "mlir/Dialect/ControlFlow/IR/ControlFlowOps.h" |
| 12 | #include "mlir/Dialect/SCF/IR/SCF.h" |
| 13 | #include "mlir/Dialect/Shape/IR/Shape.h" |
| 14 | #include "mlir/Dialect/Tensor/IR/Tensor.h" |
| 15 | #include "mlir/IR/PatternMatch.h" |
| 16 | #include "mlir/Pass/Pass.h" |
| 17 | #include "mlir/Pass/PassRegistry.h" |
| 18 | #include "mlir/Transforms/GreedyPatternRewriteDriver.h" |
| 19 | |
| 20 | namespace mlir { |
| 21 | #define GEN_PASS_DEF_CONVERTSHAPECONSTRAINTS |
| 22 | #include "mlir/Conversion/Passes.h.inc" |
| 23 | } // namespace mlir |
| 24 | |
| 25 | using namespace mlir; |
| 26 | |
| 27 | namespace { |
| 28 | #include "ShapeToStandard.cpp.inc" |
| 29 | } // namespace |
| 30 | |
| 31 | namespace { |
| 32 | class ConvertCstrRequireOp : public OpRewritePattern<shape::CstrRequireOp> { |
| 33 | public: |
| 34 | using OpRewritePattern::OpRewritePattern; |
| 35 | LogicalResult matchAndRewrite(shape::CstrRequireOp op, |
| 36 | PatternRewriter &rewriter) const override { |
| 37 | rewriter.create<cf::AssertOp>(op.getLoc(), op.getPred(), op.getMsgAttr()); |
| 38 | rewriter.replaceOpWithNewOp<shape::ConstWitnessOp>(op, true); |
| 39 | return success(); |
| 40 | } |
| 41 | }; |
| 42 | } // namespace |
| 43 | |
| 44 | void mlir::populateConvertShapeConstraintsConversionPatterns( |
| 45 | RewritePatternSet &patterns) { |
| 46 | patterns.add<CstrBroadcastableToRequire>(patterns.getContext()); |
| 47 | patterns.add<CstrEqToRequire>(patterns.getContext()); |
| 48 | patterns.add<ConvertCstrRequireOp>(arg: patterns.getContext()); |
| 49 | } |
| 50 | |
| 51 | namespace { |
| 52 | // This pass eliminates shape constraints from the program, converting them to |
| 53 | // eager (side-effecting) error handling code. After eager error handling code |
| 54 | // is emitted, witnesses are satisfied, so they are replace with |
| 55 | // `shape.const_witness true`. |
| 56 | class ConvertShapeConstraints |
| 57 | : public impl::ConvertShapeConstraintsBase<ConvertShapeConstraints> { |
| 58 | void runOnOperation() override { |
| 59 | auto *func = getOperation(); |
| 60 | auto *context = &getContext(); |
| 61 | |
| 62 | RewritePatternSet patterns(context); |
| 63 | populateConvertShapeConstraintsConversionPatterns(patterns); |
| 64 | |
| 65 | if (failed(applyPatternsAndFoldGreedily(func, std::move(patterns)))) |
| 66 | return signalPassFailure(); |
| 67 | } |
| 68 | }; |
| 69 | } // namespace |
| 70 | |
| 71 | std::unique_ptr<Pass> mlir::createConvertShapeConstraintsPass() { |
| 72 | return std::make_unique<ConvertShapeConstraints>(); |
| 73 | } |
| 74 |