Main.cpp | Explore in Territory

//===- Main.cpp - Top-Level TableGen implementation -----------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// TableGen is a tool which can be used to build up a description of something,
// then invoke one or more "tablegen backends" to emit information about the
// description in some predefined format.  In practice, this is used by the LLVM
// code generators to automate generation of a code generator through a
// high-level description of the target.
//
//===----------------------------------------------------------------------===//

#include "llvm/TableGen/Main.h"
#include "TGLexer.h"
#include "TGParser.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ErrorOr.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SMLoc.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/ToolOutputFile.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/TableGen/Error.h"
#include "llvm/TableGen/Record.h"
#include "llvm/TableGen/TGTimer.h"
#include "llvm/TableGen/TableGenBackend.h"
#include <memory>
#include <string>
#include <system_error>
#include <utility>
usingnamespacellvm;

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

static cl::opt<std::string>
DependFilename("d",
               cl::desc("Dependency filename"),
               cl::value_desc("filename"),
               cl::init(""));

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

static cl::list<std::string>
IncludeDirs("I", cl::desc("Directory of include files"),
            cl::value_desc("directory"), cl::Prefix);

static cl::list<std::string>
MacroNames("D", cl::desc("Name of the macro to be defined"),
            cl::value_desc("macro name"), cl::Prefix);

static cl::opt<bool>
WriteIfChanged("write-if-changed", cl::desc("Only write output if it changed"));

static cl::opt<bool>
TimePhases("time-phases", cl::desc("Time phases of parser and backend"));

static cl::opt<bool> NoWarnOnUnusedTemplateArgs(
    "no-warn-on-unused-template-args",
    cl::desc("Disable unused template argument warnings."));

static int reportError(const char *ProgName, Twine Msg) { … }

/// Create a dependency file for `-d` option.
///
/// This functionality is really only for the benefit of the build system.
/// It is similar to GCC's `-M*` family of options.
static int createDependencyFile(const TGParser &Parser, const char *argv0) { … }

int llvm::TableGenMain(const char *argv0,
                       std::function<TableGenMainFn> MainFn) { … }
llvm/llvm/lib/TableGen/Main.cpp
