tools/iree_translate_main.cc

// Copyright 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// IREE translation main entry function.
//
// We need this entry function because we want to register PassManager CLI
// options, which is missing in MLIR's translation main entry function.

#include "llvm/Support/InitLLVM.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/ToolOutputFile.h"
#include "mlir/IR/MLIRContext.h"
#include "mlir/Pass/PassManager.h"
#include "mlir/Support/FileUtilities.h"
#include "mlir/Support/LogicalResult.h"
#include "mlir/Support/ToolUtilities.h"
#include "mlir/Support/TranslateClParser.h"

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

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

static llvm::cl::opt<bool> splitInputFile(
    "split-input-file",
    llvm::cl::desc("Split the input file into pieces and "
                   "process each chunk independently"),
    llvm::cl::init(false));

int main(int argc, char **argv) {
  llvm::InitLLVM y(argc, argv);

  mlir::registerPassManagerCLOptions();

  // Add flags for all the registered translations.
  llvm::cl::opt<const mlir::TranslateFunction *, false, mlir::TranslationParser>
      translationRequested("", llvm::cl::desc("Translation to perform"),
                           llvm::cl::Required);

  llvm::cl::ParseCommandLineOptions(argc, argv, "IREE translation driver\n");

  std::string errorMessage;
  auto input = mlir::openInputFile(inputFilename, &errorMessage);
  if (!input) {
    llvm::errs() << errorMessage << "\n";
    return 1;
  }

  auto output = mlir::openOutputFile(outputFilename, &errorMessage);
  if (!output) {
    llvm::errs() << errorMessage << "\n";
    return 1;
  }

  /// Processes the memory buffer with a new MLIRContext.
  auto processBuffer = [&](std::unique_ptr<llvm::MemoryBuffer> ownedBuffer,
                           llvm::raw_ostream &os) {
    mlir::MLIRContext context;
    return (*translationRequested)(std::move(ownedBuffer), os, &context);
  };

  if (splitInputFile) {
    if (failed(mlir::splitAndProcessBuffer(std::move(input), processBuffer,
                                           output->os())))
      return 1;
  } else {
    if (failed(processBuffer(std::move(input), output->os()))) return 1;
  }

  output->keep();
  return 0;
}