llvm-project/mlir/tools/mlir-tblgen/mlir-tblgen.cpp

//===- mlir-tblgen.cpp - Top-Level TableGen implementation for MLIR -------===//
//
// 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 file contains the main function for MLIR's TableGen.
//
//===----------------------------------------------------------------------===//

#include "mlir/TableGen/GenInfo.h"
#include "mlir/TableGen/GenNameParser.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/FormatVariadic.h"
#include "llvm/Support/InitLLVM.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/Signals.h"
#include "llvm/TableGen/Error.h"
#include "llvm/TableGen/Main.h"
#include "llvm/TableGen/Record.h"
#include "llvm/TableGen/TableGenBackend.h"

using namespace llvm;
using namespace mlir;

static llvm::ManagedStatic<std::vector<GenInfo>> generatorRegistry;

mlir::GenRegistration::GenRegistration(StringRef arg, StringRef description,
                                       GenFunction function) {
  generatorRegistry->emplace_back(arg, description, function);
}

GenNameParser::GenNameParser(llvm::cl::Option &opt)
    : llvm::cl::parser<const GenInfo *>(opt) {
  for (const auto &kv : *generatorRegistry) {
    addLiteralOption(kv.getGenArgument(), &kv, kv.getGenDescription());
  }
}

void GenNameParser::printOptionInfo(const llvm::cl::Option &O,
                                    size_t GlobalWidth) const {
  GenNameParser *TP = const_cast<GenNameParser *>(this);
  llvm::array_pod_sort(TP->Values.begin(), TP->Values.end(),
                       [](const GenNameParser::OptionInfo *VT1,
                          const GenNameParser::OptionInfo *VT2) {
                         return VT1->Name.compare(VT2->Name);
                       });
  using llvm::cl::parser;
  parser<const GenInfo *>::printOptionInfo(O, GlobalWidth);
}

// Generator that prints records.
GenRegistration printRecords("print-records", "Print all records to stdout",
                             [](const RecordKeeper &records, raw_ostream &os) {
                               os << records;
                               return false;
                             });

// Generator to invoke.
const mlir::GenInfo *generator;

// TableGenMain requires a function pointer so this function is passed in which
// simply wraps the call to the generator.
static bool MlirTableGenMain(raw_ostream &os, RecordKeeper &records) {
  if (!generator) {
    os << records;
    return false;
  }
  return generator->invoke(records, os);
}

int main(int argc, char **argv) {
  llvm::InitLLVM y(argc, argv);
  llvm::cl::opt<const mlir::GenInfo *, false, mlir::GenNameParser> generator(
      "", llvm::cl::desc("Generator to run"));
  cl::ParseCommandLineOptions(argc, argv);
  ::generator = generator.getValue();

  return TableGenMain(argv[0], &MlirTableGenMain);
}