llvm/llvm/unittests/Transforms/Utils/MemTransferLowering.cpp

//=========- MemTransferLowerTest.cpp - MemTransferLower unit tests -=========//
//
// 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/Analysis/CGSCCPassManager.h"
#include "llvm/Analysis/ScalarEvolution.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/PassManager.h"
#include "llvm/Passes/PassBuilder.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Testing/Support/Error.h"
#include "llvm/Transforms/Utils/LowerMemIntrinsics.h"
#include "llvm/Transforms/Vectorize/LoopVectorize.h"

#include "gtest/gtest-spi.h"
#include "gtest/gtest.h"

usingnamespacellvm;

namespace {
struct ForwardingPass : public PassInfoMixin<ForwardingPass> { … };

struct MemTransferLowerTest : public testing::Test { … };

// By semantics source and destination of llvm.memcpy.* intrinsic
// are either equal or don't overlap. Once the intrinsic is lowered
// to a loop it can be hard or impossible to reason about these facts.
// For that reason expandMemCpyAsLoop is expected to  explicitly mark
// loads from source and stores to destination as not aliasing.
TEST_F(MemTransferLowerTest, MemCpyKnownLength) { … }

// This test indirectly checks that loads and stores (generated as a result of
// llvm.memcpy lowering) doesn't alias by making sure the loop can be
// successfully vectorized without additional runtime checks.
TEST_F(MemTransferLowerTest, VecMemCpyKnownLength) { … }

TEST_F(MemTransferLowerTest, AtomicMemCpyKnownLength) { … }

TEST_F(MemTransferLowerTest, AtomicMemCpyUnKnownLength) { … }
} // namespace