| 1 | //===- TestSCFWrapInZeroTripCheck.cpp -- Pass to test SCF zero-trip-check -===// |
|---|---|
| 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 | // This file implements the passes to test wrap-in-zero-trip-check transforms on |
| 10 | // SCF loop ops. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "mlir/Dialect/Func/IR/FuncOps.h" |
| 15 | #include "mlir/Dialect/SCF/IR/SCF.h" |
| 16 | #include "mlir/Dialect/SCF/Transforms/Patterns.h" |
| 17 | #include "mlir/Dialect/SCF/Transforms/Transforms.h" |
| 18 | #include "mlir/IR/PatternMatch.h" |
| 19 | #include "mlir/Pass/Pass.h" |
| 20 | #include "mlir/Transforms/GreedyPatternRewriteDriver.h" |
| 21 | |
| 22 | using namespace mlir; |
| 23 | |
| 24 | namespace { |
| 25 | |
| 26 | struct TestWrapWhileLoopInZeroTripCheckPass |
| 27 | : public PassWrapper<TestWrapWhileLoopInZeroTripCheckPass, |
| 28 | OperationPass<func::FuncOp>> { |
| 29 | MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID( |
| 30 | TestWrapWhileLoopInZeroTripCheckPass) |
| 31 | |
| 32 | StringRef getArgument() const final { |
| 33 | return "test-wrap-scf-while-loop-in-zero-trip-check"; |
| 34 | } |
| 35 | |
| 36 | StringRef getDescription() const final { |
| 37 | return "test scf::wrapWhileLoopInZeroTripCheck"; |
| 38 | } |
| 39 | |
| 40 | TestWrapWhileLoopInZeroTripCheckPass() = default; |
| 41 | TestWrapWhileLoopInZeroTripCheckPass( |
| 42 | const TestWrapWhileLoopInZeroTripCheckPass &) {} |
| 43 | explicit TestWrapWhileLoopInZeroTripCheckPass(bool forceCreateCheckParam) { |
| 44 | forceCreateCheck = forceCreateCheckParam; |
| 45 | } |
| 46 | |
| 47 | void runOnOperation() override { |
| 48 | func::FuncOp func = getOperation(); |
| 49 | MLIRContext *context = &getContext(); |
| 50 | IRRewriter rewriter(context); |
| 51 | if (forceCreateCheck) { |
| 52 | func.walk([&](scf::WhileOp op) { |
| 53 | FailureOr<scf::WhileOp> result = |
| 54 | scf::wrapWhileLoopInZeroTripCheck(op, rewriter, forceCreateCheck); |
| 55 | // Ignore not implemented failure in tests. The expected output should |
| 56 | // catch problems (e.g. transformation doesn't happen). |
| 57 | (void)result; |
| 58 | }); |
| 59 | } else { |
| 60 | RewritePatternSet patterns(context); |
| 61 | scf::populateSCFRotateWhileLoopPatterns(patterns); |
| 62 | (void)applyPatternsGreedily(func, std::move(patterns)); |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | Option<bool> forceCreateCheck{ |
| 67 | *this, "force-create-check", |
| 68 | llvm::cl::desc("Force to create zero-trip-check."), |
| 69 | llvm::cl::init(false)}; |
| 70 | }; |
| 71 | |
| 72 | } // namespace |
| 73 | |
| 74 | namespace mlir { |
| 75 | namespace test { |
| 76 | void registerTestSCFWrapInZeroTripCheckPasses() { |
| 77 | PassRegistration<TestWrapWhileLoopInZeroTripCheckPass>(); |
| 78 | } |
| 79 | } // namespace test |
| 80 | } // namespace mlir |
| 81 |