| 1 | //===- TestWhileOpBuilder.cpp - Pass to test WhileOp::build ---------------===// |
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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 test some builder functions of WhileOp. It |
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| 10 | // tests the regression explained in https://reviews.llvm.org/D142952, where |
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| 11 | // a WhileOp::build overload crashed when fed with operands of different types |
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| 12 | // than the result types. |
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| 13 | // |
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| 14 | // To test the build function, the pass copies each WhileOp found in the body |
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| 15 | // of a FuncOp and adds an additional WhileOp with the same operands and result |
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| 16 | // types (but dummy computations) using the builder in question. |
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| 17 | // |
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| 18 | //===----------------------------------------------------------------------===// |
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| 19 | |
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| 20 | #include "mlir/Dialect/Arith/IR/Arith.h" |
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| 21 | #include "mlir/Dialect/Func/IR/FuncOps.h" |
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| 22 | #include "mlir/Dialect/SCF/IR/SCF.h" |
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| 23 | #include "mlir/IR/BuiltinOps.h" |
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| 24 | #include "mlir/IR/ImplicitLocOpBuilder.h" |
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| 25 | #include "mlir/Pass/Pass.h" |
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| 26 | |
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| 27 | using namespace mlir; |
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| 28 | using namespace mlir::arith; |
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| 29 | using namespace mlir::scf; |
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| 30 | |
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| 31 | namespace { |
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| 32 | struct TestSCFWhileOpBuilderPass |
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| 33 | : public PassWrapper<TestSCFWhileOpBuilderPass, |
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| 34 | OperationPass<func::FuncOp>> { |
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| 35 | MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(TestSCFWhileOpBuilderPass) |
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| 36 | |
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| 37 | StringRef getArgument() const final { return "test-scf-while-op-builder" ; } |
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| 38 | StringRef getDescription() const final { |
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| 39 | return "test build functions of scf.while" ; |
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| 40 | } |
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| 41 | explicit TestSCFWhileOpBuilderPass() = default; |
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| 42 | TestSCFWhileOpBuilderPass(const TestSCFWhileOpBuilderPass &pass) = default; |
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| 43 | |
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| 44 | void runOnOperation() override { |
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| 45 | func::FuncOp func = getOperation(); |
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| 46 | func.walk([&](WhileOp whileOp) { |
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| 47 | Location loc = whileOp->getLoc(); |
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| 48 | ImplicitLocOpBuilder builder(loc, whileOp); |
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| 49 | |
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| 50 | // Create a WhileOp with the same operands and result types. |
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| 51 | TypeRange resultTypes = whileOp->getResultTypes(); |
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| 52 | ValueRange operands = whileOp->getOperands(); |
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| 53 | builder.create<WhileOp>( |
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| 54 | loc, resultTypes, operands, /*beforeBuilder=*/ |
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| 55 | [&](OpBuilder &b, Location loc, ValueRange args) { |
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| 56 | // Just cast the before args into the right types for condition. |
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| 57 | ImplicitLocOpBuilder builder(loc, b); |
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| 58 | auto castOp = |
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| 59 | builder.create<UnrealizedConversionCastOp>(resultTypes, args); |
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| 60 | auto cmp = builder.create<ConstantIntOp>(/*value=*/1, /*width=*/1); |
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| 61 | builder.create<ConditionOp>(cmp, castOp->getResults()); |
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| 62 | }, |
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| 63 | /*afterBuilder=*/ |
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| 64 | [&](OpBuilder &b, Location loc, ValueRange args) { |
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| 65 | // Just cast the after args into the right types for yield. |
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| 66 | ImplicitLocOpBuilder builder(loc, b); |
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| 67 | auto castOp = builder.create<UnrealizedConversionCastOp>( |
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| 68 | operands.getTypes(), args); |
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| 69 | builder.create<YieldOp>(castOp->getResults()); |
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| 70 | }); |
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| 71 | }); |
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| 72 | } |
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| 73 | }; |
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| 74 | } // namespace |
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| 75 | |
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| 76 | namespace mlir { |
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| 77 | namespace test { |
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| 78 | void registerTestSCFWhileOpBuilderPass() { |
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| 79 | PassRegistration<TestSCFWhileOpBuilderPass>(); |
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| 80 | } |
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| 81 | } // namespace test |
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| 82 | } // namespace mlir |
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| 83 | |
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