82 lines
3.2 KiB
C++
82 lines
3.2 KiB
C++
//===- TestWhileOpBuilder.cpp - Pass to test WhileOp::build ---------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements a pass to test some builder functions of WhileOp. It
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// tests the regression explained in https://reviews.llvm.org/D142952, where
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// a WhileOp::build overload crashed when fed with operands of different types
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// than the result types.
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//
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// To test the build function, the pass copies each WhileOp found in the body
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// of a FuncOp and adds an additional WhileOp with the same operands and result
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// types (but dummy computations) using the builder in question.
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//
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//===----------------------------------------------------------------------===//
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#include "mlir/Dialect/Arith/IR/Arith.h"
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#include "mlir/Dialect/Func/IR/FuncOps.h"
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#include "mlir/Dialect/SCF/IR/SCF.h"
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#include "mlir/IR/BuiltinOps.h"
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#include "mlir/IR/ImplicitLocOpBuilder.h"
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#include "mlir/Pass/Pass.h"
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using namespace mlir;
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using namespace mlir::arith;
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using namespace mlir::scf;
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namespace {
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struct TestSCFWhileOpBuilderPass
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: public PassWrapper<TestSCFWhileOpBuilderPass,
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OperationPass<func::FuncOp>> {
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MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(TestSCFWhileOpBuilderPass)
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StringRef getArgument() const final { return "test-scf-while-op-builder"; }
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StringRef getDescription() const final {
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return "test build functions of scf.while";
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}
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explicit TestSCFWhileOpBuilderPass() = default;
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TestSCFWhileOpBuilderPass(const TestSCFWhileOpBuilderPass &pass) = default;
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void runOnOperation() override {
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func::FuncOp func = getOperation();
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func.walk([&](WhileOp whileOp) {
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Location loc = whileOp->getLoc();
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ImplicitLocOpBuilder builder(loc, whileOp);
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// Create a WhileOp with the same operands and result types.
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TypeRange resultTypes = whileOp->getResultTypes();
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ValueRange operands = whileOp->getOperands();
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builder.create<WhileOp>(
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loc, resultTypes, operands, /*beforeBuilder=*/
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[&](OpBuilder &b, Location loc, ValueRange args) {
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// Just cast the before args into the right types for condition.
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ImplicitLocOpBuilder builder(loc, b);
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auto castOp =
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builder.create<UnrealizedConversionCastOp>(resultTypes, args);
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auto cmp = builder.create<ConstantIntOp>(/*value=*/1, /*width=*/1);
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builder.create<ConditionOp>(cmp, castOp->getResults());
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},
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/*afterBuilder=*/
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[&](OpBuilder &b, Location loc, ValueRange args) {
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// Just cast the after args into the right types for yield.
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ImplicitLocOpBuilder builder(loc, b);
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auto castOp = builder.create<UnrealizedConversionCastOp>(
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operands.getTypes(), args);
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builder.create<YieldOp>(castOp->getResults());
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});
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});
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}
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};
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} // namespace
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namespace mlir {
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namespace test {
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void registerTestSCFWhileOpBuilderPass() {
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PassRegistration<TestSCFWhileOpBuilderPass>();
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}
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} // namespace test
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} // namespace mlir
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