| 1 | //===- InitTensorToAllocTensor.cpp - Lower tensor.empty to alloc_tensor ---===// |
|---|---|
| 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/Dialect/Bufferization/Transforms/Passes.h" |
| 10 | |
| 11 | #include "mlir/Dialect/Bufferization/IR/Bufferization.h" |
| 12 | #include "mlir/Dialect/Bufferization/Transforms/Transforms.h" |
| 13 | #include "mlir/Dialect/Tensor/IR/Tensor.h" |
| 14 | #include "mlir/Pass/Pass.h" |
| 15 | #include "mlir/Transforms/GreedyPatternRewriteDriver.h" |
| 16 | |
| 17 | namespace mlir { |
| 18 | namespace bufferization { |
| 19 | #define GEN_PASS_DEF_EMPTYTENSORTOALLOCTENSORPASS |
| 20 | #include "mlir/Dialect/Bufferization/Transforms/Passes.h.inc" |
| 21 | } // namespace bufferization |
| 22 | } // namespace mlir |
| 23 | |
| 24 | using namespace mlir; |
| 25 | using namespace mlir::bufferization; |
| 26 | using namespace mlir::tensor; |
| 27 | |
| 28 | namespace { |
| 29 | struct EmptyTensorLoweringPattern : public OpRewritePattern<tensor::EmptyOp> { |
| 30 | using OpRewritePattern<tensor::EmptyOp>::OpRewritePattern; |
| 31 | |
| 32 | LogicalResult matchAndRewrite(tensor::EmptyOp op, |
| 33 | PatternRewriter &rewriter) const override { |
| 34 | rewriter.replaceOpWithNewOp<bufferization::AllocTensorOp>( |
| 35 | op, op.getType(), op.getDynamicSizes()); |
| 36 | return success(); |
| 37 | } |
| 38 | }; |
| 39 | |
| 40 | struct EmptyTensorToAllocTensor |
| 41 | : public bufferization::impl::EmptyTensorToAllocTensorPassBase< |
| 42 | EmptyTensorToAllocTensor> { |
| 43 | void runOnOperation() override; |
| 44 | |
| 45 | void getDependentDialects(DialectRegistry ®istry) const override { |
| 46 | registry |
| 47 | .insert<tensor::TensorDialect, bufferization::BufferizationDialect>(); |
| 48 | } |
| 49 | }; |
| 50 | } // namespace |
| 51 | |
| 52 | void bufferization::populateEmptyTensorToAllocTensorPattern( |
| 53 | RewritePatternSet &patterns) { |
| 54 | patterns.insert<EmptyTensorLoweringPattern>(arg: patterns.getContext()); |
| 55 | } |
| 56 | |
| 57 | void EmptyTensorToAllocTensor::runOnOperation() { |
| 58 | Operation *op = getOperation(); |
| 59 | RewritePatternSet patterns(op->getContext()); |
| 60 | populateEmptyTensorToAllocTensorPattern(patterns); |
| 61 | if (failed(applyPatternsGreedily(op, std::move(patterns)))) |
| 62 | signalPassFailure(); |
| 63 | } |
| 64 |