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 | |