diff --git a/src/builder/frontend_dialect_transformer.cpp b/src/builder/frontend_dialect_transformer.cpp
index 05c079a..3547f1d 100644
--- a/src/builder/frontend_dialect_transformer.cpp
+++ b/src/builder/frontend_dialect_transformer.cpp
@@ -745,8 +745,6 @@ mlir::OwningModuleRef ImportFrontendModel(onnx::ModelProto model) {
   mlir::MLIRContext context;
   FrontendGenImpl myONNXGen(context);
   auto module = myONNXGen.ImportONNXModel(model);
-  module.dump();
-
   return module;
 }
 
@@ -761,6 +759,5 @@ void ImportFrontendModelFile(std::string model_fname,
 
   FrontendGenImpl myONNXGen(context);
   module = myONNXGen.ImportONNXModel(model);
-  module->dump();
 }
 }  // namespace onnf
diff --git a/src/main.cpp b/src/main.cpp
index 078f229..eb4b8e4 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -77,21 +77,36 @@ int main(int argc, char *argv[]) {
   llvm::cl::opt<string> inputFilename(
       llvm::cl::Positional, llvm::cl::desc("<input file>"), llvm::cl::init("-"),
       llvm::cl::cat(OnnfOptions));
+
+  enum EmissionTargetType {
+    EmitONNXIR,
+    EmitMLIR,
+    EmitLLVMIR,
+    EmitLLVMBC,
+  };
+  llvm::cl::opt<EmissionTargetType> emissionTarget(
+      llvm::cl::desc("Choose target to emit:"),
+      llvm::cl::values(
+          clEnumVal(EmitONNXIR, "No optimizations, enable debugging"),
+          clEnumVal(EmitMLIR, "Enable trivial optimizations"),
+          clEnumVal(EmitLLVMIR, "Enable default optimizations"),
+          clEnumVal(EmitLLVMBC, "Enable expensive optimizations")),
+      llvm::cl::init(EmitLLVMBC), llvm::cl::cat(OnnfOptions));
+
   llvm::cl::HideUnrelatedOptions(OnnfOptions);
   llvm::cl::ParseCommandLineOptions(argc, argv,
                                     "ONNF MLIR modular optimizer driver\n");
 
-  mlir::MLIRContext context;
-  mlir::OwningModuleRef module;
-
   // Decide if the input file is an ONNX model or a model specified
   // in MLIR. The extension of the file is the decider.
   string extension = inputFilename.substr(inputFilename.find_last_of(".") + 1);
   bool inputIsONNX = (extension == "onnx");
   bool inputIsMLIR = (extension == "mlir");
-
   assert(inputIsONNX != inputIsMLIR &&
          "Either ONNX model or MLIR file needs to be provided.");
+
+  mlir::MLIRContext context;
+  mlir::OwningModuleRef module;
   if (inputIsONNX) {
     ImportFrontendModelFile(inputFilename, context, module);
   } else {
@@ -101,17 +116,26 @@ int main(int argc, char *argv[]) {
   mlir::PassManager pm(&context);
   pm.addPass(mlir::createShapeInferencePass());
   pm.addPass(mlir::createCanonicalizerPass());
-  pm.addPass(mlir::createLowerToKrnlPass());
-  pm.addPass(mlir::createLowerKrnlPass());
-  pm.addPass(mlir::createLowerAffinePass());
-  pm.addPass(mlir::createLowerToCFGPass());
-  pm.addPass(mlir::createKrnlLowerToLLVMPass());
-  pm.addPass(mlir::createCanonicalizerPass());
+
+  if (emissionTarget >= EmitMLIR) {
+    pm.addPass(mlir::createLowerToKrnlPass());
+    pm.addPass(mlir::createLowerKrnlPass());
+  }
+
+  if (emissionTarget >= EmitLLVMIR) {
+    pm.addPass(mlir::createLowerAffinePass());
+    pm.addPass(mlir::createLowerToCFGPass());
+    pm.addPass(mlir::createKrnlLowerToLLVMPass());
+    pm.addPass(mlir::createCanonicalizerPass());
+  }
 
   if (mlir::failed(pm.run(*module)))
     return 4;
 
+  module->dump();
+
   // Write LLVM bitcode to disk.
-  EmitLLVMBitCode(module);
+  if (emissionTarget == EmitLLVMBC)
+    EmitLLVMBitCode(module);
   return 0;
 }
diff --git a/src/runtime/CMakeLists.txt b/src/runtime/CMakeLists.txt
index 8522310..040ae01 100644
--- a/src/runtime/CMakeLists.txt
+++ b/src/runtime/CMakeLists.txt
@@ -15,3 +15,4 @@ target_link_libraries(pyruntime PRIVATE ${CMAKE_DL_LIBS})
 target_include_directories(pyruntime
         PRIVATE ${ONNF_SRC_ROOT} ${ONNF_BIN_ROOT}
         ${ONNF_SRC_ROOT})
+add_dependencies(pyruntime cruntime)