diff --git a/src/compiler/tool/dlc_opt/dlc_opt.cpp b/src/compiler/tool/dlc_opt/dlc_opt.cpp
deleted file mode 100644
index c2c976a..0000000
--- a/src/compiler/tool/dlc_opt/dlc_opt.cpp
+++ /dev/null
@@ -1,57 +0,0 @@
-#include <llvm/Support/CommandLine.h>
-#include <llvm/Support/InitLLVM.h>
-#include <llvm/Support/MemoryBuffer.h>
-#include <llvm/Support/ToolOutputFile.h>
-#include <mlir/Pass/Pass.h>
-#include <mlir/Pass/PassManager.h>
-#include <mlir/Support/FileUtilities.h>
-#include <mlir/Support/MlirOptMain.h>
-#include <mlir/Dialect/StandardOps/Ops.h>
-
-#include "src/compiler/helper.hpp"
-
-using namespace dlc;
-
-static llvm::cl::opt<std::string> input_filename(
-    llvm::cl::Positional, llvm::cl::desc("<input file>"), llvm::cl::init("-"));
-
-static llvm::cl::opt<std::string> output_filename("o",
-    llvm::cl::desc("Output filename"), llvm::cl::value_desc("filename"),
-    llvm::cl::init("-"));
-
-static llvm::cl::opt<bool> split_input_file("split-input-file",
-    llvm::cl::desc("Split the input file into pieces and process each "
-                   "chunk independently"),
-    llvm::cl::init(false));
-
-static llvm::cl::opt<bool> verify_diagnostics("verify-diagnostics",
-    llvm::cl::desc("Check that emitted diagnostics match "
-                   "expected-* lines on the corresponding line"),
-    llvm::cl::init(false));
-
-static llvm::cl::opt<bool> verify_passes("verify-each",
-    llvm::cl::desc("Run the verifier after each transformation pass"),
-    llvm::cl::init(true));
-
-int main(int argc, char** argv) {
-  llvm::InitLLVM y(argc, argv);
-
-  // Register any pass manager command line options.
-  mlir::registerPassManagerCLOptions();
-  mlir::PassPipelineCLParser passPipeline("", "Compiler passes to run");
-  llvm::cl::ParseCommandLineOptions(
-      argc, argv, "dlc MLIR modular optimizer driver\n");
-
-  // Set up the input file.
-  std::string error_message;
-  auto file = mlir::openInputFile(input_filename, &error_message);
-  DLC_REQUIRE_MSG(file, error_message)
-
-  auto output = mlir::openOutputFile(output_filename, &error_message);
-  DLC_REQUIRE_MSG(output, error_message)
-
-  mlir::registerDialect<mlir::StandardOpsDialect>();
-
-  return failed(mlir::MlirOptMain(output->os(), std::move(file), passPipeline,
-      split_input_file, verify_diagnostics, verify_passes));
-}
diff --git a/src/compiler/tool/dlc_opt/onnf_opt.cpp b/src/compiler/tool/dlc_opt/onnf_opt.cpp
deleted file mode 100644
index fc46803..0000000
--- a/src/compiler/tool/dlc_opt/onnf_opt.cpp
+++ /dev/null
@@ -1,61 +0,0 @@
-//===---------------------- onnf-opt.cpp - MLIR Operations -----------------===//
-//
-// Copyright 2019 The IBM Research Authors.
-//
-// =============================================================================
-//
-//===----------------------------------------------------------------------===//
-
-#include <llvm/Support/CommandLine.h>
-#include <llvm/Support/InitLLVM.h>
-#include <llvm/Support/MemoryBuffer.h>
-#include <llvm/Support/ToolOutputFile.h>
-#include <mlir/Pass/Pass.h>
-#include <mlir/Pass/PassManager.h>
-#include <mlir/Support/FileUtilities.h>
-#include <mlir/Support/MlirOptMain.h>
-#include <mlir/Dialect/StandardOps/Ops.h>
-
-using namespace onnf;
-
-static llvm::cl::opt<std::string> input_filename(
-    llvm::cl::Positional, llvm::cl::desc("<input file>"), llvm::cl::init("-"));
-
-static llvm::cl::opt<std::string> output_filename("o",
-    llvm::cl::desc("Output filename"), llvm::cl::value_desc("filename"),
-    llvm::cl::init("-"));
-
-static llvm::cl::opt<bool> split_input_file("split-input-file",
-    llvm::cl::desc("Split the input file into pieces and process each "
-                   "chunk independently"),
-    llvm::cl::init(false));
-
-static llvm::cl::opt<bool> verify_diagnostics("verify-diagnostics",
-    llvm::cl::desc("Check that emitted diagnostics match "
-                   "expected-* lines on the corresponding line"),
-    llvm::cl::init(false));
-
-static llvm::cl::opt<bool> verify_passes("verify-each",
-    llvm::cl::desc("Run the verifier after each transformation pass"),
-    llvm::cl::init(true));
-
-int main(int argc, char** argv) {
-  llvm::InitLLVM y(argc, argv);
-
-  // Register any pass manager command line options.
-  mlir::registerPassManagerCLOptions();
-  mlir::PassPipelineCLParser passPipeline("", "Compiler passes to run");
-  llvm::cl::ParseCommandLineOptions(
-      argc, argv, "onnf MLIR modular optimizer driver\n");
-
-  // Set up the input file.
-  std::string error_message;
-  auto file = mlir::openInputFile(input_filename, &error_message);
-
-  auto output = mlir::openOutputFile(output_filename, &error_message);
-
-  mlir::registerDialect<mlir::StandardOpsDialect>();
-
-  return failed(mlir::MlirOptMain(output->os(), std::move(file), passPipeline,
-      split_input_file, verify_diagnostics, verify_passes));
-}