| 1 | //===- LoopCoalescing.cpp - Pass transforming loop nests into single loops-===// |
|---|---|
| 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/Affine/Passes.h" |
| 10 | |
| 11 | #include "mlir/Dialect/Affine/IR/AffineOps.h" |
| 12 | #include "mlir/Dialect/Affine/LoopUtils.h" |
| 13 | #include "mlir/Dialect/Arith/IR/Arith.h" |
| 14 | #include "mlir/Dialect/Func/IR/FuncOps.h" |
| 15 | #include "mlir/Dialect/SCF/IR/SCF.h" |
| 16 | #include "mlir/Dialect/SCF/Utils/Utils.h" |
| 17 | #include "mlir/Transforms/Passes.h" |
| 18 | #include "mlir/Transforms/RegionUtils.h" |
| 19 | #include "llvm/Support/Debug.h" |
| 20 | |
| 21 | namespace mlir { |
| 22 | namespace affine { |
| 23 | #define GEN_PASS_DEF_LOOPCOALESCING |
| 24 | #include "mlir/Dialect/Affine/Passes.h.inc" |
| 25 | } // namespace affine |
| 26 | } // namespace mlir |
| 27 | |
| 28 | #define PASS_NAME "loop-coalescing" |
| 29 | #define DEBUG_TYPE PASS_NAME |
| 30 | |
| 31 | using namespace mlir; |
| 32 | using namespace mlir::affine; |
| 33 | |
| 34 | namespace { |
| 35 | struct LoopCoalescingPass |
| 36 | : public affine::impl::LoopCoalescingBase<LoopCoalescingPass> { |
| 37 | |
| 38 | void runOnOperation() override { |
| 39 | func::FuncOp func = getOperation(); |
| 40 | func.walk<WalkOrder::PreOrder>([](Operation *op) { |
| 41 | if (auto scfForOp = dyn_cast<scf::ForOp>(op)) |
| 42 | (void)coalescePerfectlyNestedSCFForLoops(scfForOp); |
| 43 | else if (auto affineForOp = dyn_cast<AffineForOp>(op)) |
| 44 | (void)coalescePerfectlyNestedAffineLoops(affineForOp); |
| 45 | }); |
| 46 | } |
| 47 | }; |
| 48 | |
| 49 | } // namespace |
| 50 | |
| 51 | std::unique_ptr<OperationPass<func::FuncOp>> |
| 52 | mlir::affine::createLoopCoalescingPass() { |
| 53 | return std::make_unique<LoopCoalescingPass>(); |
| 54 | } |
| 55 |