llvm/llvm/tools/llvm-isel-fuzzer/llvm-isel-fuzzer.cpp

//===--- llvm-isel-fuzzer.cpp - Fuzzer for instruction selection ----------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// Tool to fuzz instruction selection using libFuzzer.
//
//===----------------------------------------------------------------------===//

#include "llvm/ADT/StringRef.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/Bitcode/BitcodeReader.h"
#include "llvm/Bitcode/BitcodeWriter.h"
#include "llvm/CodeGen/CommandFlags.h"
#include "llvm/FuzzMutate/FuzzerCLI.h"
#include "llvm/FuzzMutate/IRMutator.h"
#include "llvm/FuzzMutate/Operations.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Verifier.h"
#include "llvm/IRReader/IRReader.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Target/TargetMachine.h"

#define DEBUG_TYPE …

usingnamespacellvm;

static codegen::RegisterCodeGenFlags CGF;

static cl::opt<char>
    OptLevel("O",
             cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] "
                      "(default = '-O2')"),
             cl::Prefix, cl::init('2'));

static cl::opt<std::string>
    TargetTriple("mtriple", cl::desc("Override target triple for module"));

static std::unique_ptr<TargetMachine> TM;
static std::unique_ptr<IRMutator> Mutator;

std::unique_ptr<IRMutator> createISelMutator() { … }

extern "C" LLVM_ATTRIBUTE_USED size_t LLVMFuzzerCustomMutator(
    uint8_t *Data, size_t Size, size_t MaxSize, unsigned int Seed) { … }

extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { … }

static void handleLLVMFatalError(void *, const char *Message, bool) { … }

extern "C" LLVM_ATTRIBUTE_USED int LLVMFuzzerInitialize(int *argc,
                                                        char ***argv) { … }