llvm/llvm/examples/BrainF/BrainFDriver.cpp

//===-- BrainFDriver.cpp - BrainF compiler driver -------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This program converts the BrainF language into LLVM assembly,
// which it can then run using the JIT or output as BitCode.
//
// This implementation has a tape of 65536 bytes,
// with the head starting in the middle.
// Range checking is off by default, so be careful.
// It can be enabled with -abc.
//
// Use:
// ./BrainF -jit      prog.bf          #Run program now
// ./BrainF -jit -abc prog.bf          #Run program now safely
// ./BrainF           prog.bf          #Write as BitCode
//
// lli prog.bf.bc                      #Run generated BitCode
//
//===----------------------------------------------------------------------===//

#include "BrainF.h"
#include "llvm/ADT/APInt.h"
#include "llvm/Bitcode/BitcodeWriter.h"
#include "llvm/ExecutionEngine/ExecutionEngine.h"
#include "llvm/ExecutionEngine/GenericValue.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Value.h"
#include "llvm/IR/Verifier.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Support/raw_ostream.h"
#include <cstdlib>
#include <fstream>
#include <iostream>
#include <memory>
#include <string>
#include <system_error>
#include <vector>

usingnamespacellvm;

//Command line options

static cl::opt<std::string>
InputFilename(cl::Positional, cl::desc("<input brainf>"));

static cl::opt<std::string>
OutputFilename("o", cl::desc("Output filename"), cl::value_desc("filename"));

static cl::opt<bool>
ArrayBoundsChecking("abc", cl::desc("Enable array bounds checking"));

static cl::opt<bool>
JIT("jit", cl::desc("Run program Just-In-Time"));

//Add main function so can be fully compiled
void addMainFunction(Module *mod) { … }

int main(int argc, char **argv) { … }