llvm/llvm/unittests/Transforms/Utils/LoopRotationUtilsTest.cpp

//===- LoopRotationUtilsTest.cpp - Unit tests for LoopRotation utility ----===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#include "llvm/Transforms/Utils/LoopRotationUtils.h"
#include "llvm/Analysis/AssumptionCache.h"
#include "llvm/Analysis/InstructionSimplify.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/ScalarEvolution.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/SourceMgr.h"
#include "gtest/gtest.h"

usingnamespacellvm;

static std::unique_ptr<Module> parseIR(LLVMContext &C, const char *IR) { … }

/// This test contains multi-deopt-exits pattern that might allow loop rotation
/// to trigger multiple times if multiple rotations are enabled.
/// At least one rotation should be performed, no matter what loop rotation settings are.
TEST(LoopRotate, MultiDeoptExit) { … }

/// Checking a special case of multi-deopt exit loop that can not perform
/// required amount of rotations due to the desired header containing
/// non-duplicatable code.
/// Similar to MultiDeoptExit test this one should do at least one rotation and
/// pass no matter what loop rotation settings are.
TEST(LoopRotate, MultiDeoptExit_Nondup) { … }