| 1 | //===- TestLoopParametricTiling.cpp --- Parametric loop tiling 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 parametrically tile nests of standard loops. |
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| 10 | // |
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| 11 | //===----------------------------------------------------------------------===// |
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| 12 | |
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| 13 | #include "mlir/Dialect/SCF/IR/SCF.h" |
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| 14 | #include "mlir/Dialect/SCF/Utils/Utils.h" |
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| 15 | #include "mlir/IR/Builders.h" |
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| 16 | #include "mlir/Pass/Pass.h" |
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| 17 | |
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| 18 | using namespace mlir; |
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| 19 | |
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| 20 | namespace { |
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| 21 | |
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| 22 | // Extracts fixed-range loops for top-level loop nests with ranges defined in |
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| 23 | // the pass constructor. Assumes loops are permutable. |
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| 24 | class SimpleParametricLoopTilingPass |
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| 25 | : public PassWrapper<SimpleParametricLoopTilingPass, OperationPass<>> { |
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| 26 | public: |
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| 27 | MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(SimpleParametricLoopTilingPass) |
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| 28 | |
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| 29 | StringRef getArgument() const final { |
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| 30 | return "test-extract-fixed-outer-loops" ; |
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| 31 | } |
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| 32 | StringRef getDescription() const final { |
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| 33 | return "test application of parametric tiling to the outer loops so that " |
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| 34 | "the ranges of outer loops become static" ; |
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| 35 | } |
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| 36 | SimpleParametricLoopTilingPass() = default; |
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| 37 | SimpleParametricLoopTilingPass(const SimpleParametricLoopTilingPass &) {} |
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| 38 | explicit SimpleParametricLoopTilingPass(ArrayRef<int64_t> outerLoopSizes) { |
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| 39 | sizes = outerLoopSizes; |
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| 40 | } |
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| 41 | |
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| 42 | void runOnOperation() override { |
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| 43 | if (sizes.empty()) { |
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| 44 | emitError( |
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| 45 | UnknownLoc::get(&getContext()), |
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| 46 | "missing `test-outer-loop-sizes` pass-option for outer loop sizes" ); |
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| 47 | signalPassFailure(); |
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| 48 | return; |
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| 49 | } |
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| 50 | getOperation()->walk(callback: [this](scf::ForOp op) { |
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| 51 | // Ignore nested loops. |
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| 52 | if (op->getParentRegion()->getParentOfType<scf::ForOp>()) |
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| 53 | return; |
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| 54 | extractFixedOuterLoops(op, sizes); |
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| 55 | }); |
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| 56 | } |
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| 57 | |
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| 58 | ListOption<int64_t> sizes{ |
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| 59 | *this, "test-outer-loop-sizes" , |
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| 60 | llvm::cl::desc( |
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| 61 | "fixed number of iterations that the outer loops should have" )}; |
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| 62 | }; |
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| 63 | } // namespace |
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| 64 | |
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| 65 | namespace mlir { |
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| 66 | namespace test { |
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| 67 | void registerSimpleParametricTilingPass() { |
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| 68 | PassRegistration<SimpleParametricLoopTilingPass>(); |
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| 69 | } |
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| 70 | } // namespace test |
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| 71 | } // namespace mlir |
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| 72 | |
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