diff --git a/CMakeLists.txt b/CMakeLists.txt
index 46ccd32..53b79bd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -35,6 +35,9 @@ if(Boost_FOUND)
   include_directories(${Boost_INCLUDE_DIRS})
 endif()
 
+include(MLIR.cmake)
+
 add_subdirectory(src/builder)
+add_subdirectory(src/compiler)
 add_subdirectory(src)
 
diff --git a/MLIR.cmake b/MLIR.cmake
new file mode 100644
index 0000000..ca7f413
--- /dev/null
+++ b/MLIR.cmake
@@ -0,0 +1,107 @@
+# Flags to link with LLVM/MLIR libraries
+if(DEFINED ENV{LLVM_PROJECT_ROOT})
+  set(LLVM_PROJECT_ROOT $ENV{LLVM_PROJECT_ROOT})
+  if(EXISTS ${LLVM_PROJECT_ROOT})
+    message(STATUS "LLVM_PROJECT_ROOT " ${LLVM_PROJECT_ROOT})
+  else()
+    message(
+      FATAL_ERROR "The path specified by LLVM_PROJECT_ROOT does not exist: "
+                  ${LLVM_PROJECT_ROOT})
+  endif()
+else()
+  message(FATAL_ERROR "env variable LLVM_PROJECT_ROOT not set")
+endif()
+
+if(DEFINED ENV{LLVM_PROJECT_LIB})
+  set(LLVM_PROJECT_LIB $ENV{LLVM_PROJECT_LIB})
+else()
+  set(LLVM_PROJECT_LIB $ENV{LLVM_PROJECT_ROOT}/build/lib)
+endif()
+if(EXISTS ${LLVM_PROJECT_LIB})
+  message(STATUS "LLVM_PROJECT_LIB " ${LLVM_PROJECT_LIB})
+else()
+  message(FATAL_ERROR "The path specified by LLVM_PROJECT_LIB does not exist: "
+                      ${LLVM_PROJECT_LIB})
+endif()
+
+# include path
+set(LLVM_SRC_INCLUDE_PATH ${LLVM_PROJECT_ROOT}/llvm/include)
+set(LLVM_BIN_INCLUDE_PATH ${LLVM_PROJECT_ROOT}/build/include)
+set(MLIR_SRC_INCLUDE_PATH ${LLVM_PROJECT_ROOT}/llvm/projects/mlir/include)
+set(MLIR_BIN_INCLUDE_PATH ${LLVM_PROJECT_ROOT}/build/projects/mlir/include)
+
+set(MLIR_INCLUDE_PATHS
+    ${LLVM_SRC_INCLUDE_PATH};${LLVM_BIN_INCLUDE_PATH};${MLIR_SRC_INCLUDE_PATH};${MLIR_BIN_INCLUDE_PATH})
+include_directories(${MLIR_INCLUDE_PATHS})
+
+find_library(MLIRLIBANALYSIS
+             NAMES MLIRAnalysis
+             PATHS ${LLVM_PROJECT_LIB}
+             NO_DEFAULT_PATH)
+
+find_library(MLIRLIBIR NAMES MLIRIR PATHS ${LLVM_PROJECT_LIB} NO_DEFAULT_PATH)
+
+find_library(MLIRLIBPARSER
+             NAMES MLIRParser
+             PATHS ${LLVM_PROJECT_LIB}
+             NO_DEFAULT_PATH)
+
+find_library(MLIRLIBTRANSFORMS
+             NAMES MLIRTransforms
+             PATHS ${LLVM_PROJECT_LIB}
+             NO_DEFAULT_PATH)
+
+find_library(MLIRLIBVECTOROPS
+             NAMES MLIRVectorOps
+             PATHS ${LLVM_PROJECT_LIB}
+             NO_DEFAULT_PATH)
+
+find_library(MLIRLIBSUPPORT
+             NAMES MLIRSupport
+             PATHS ${LLVM_PROJECT_LIB}
+             NO_DEFAULT_PATH)
+
+find_library(MLIRLIBSTANDARDOPS
+             NAMES MLIRStandardOps
+             PATHS ${LLVM_PROJECT_LIB}
+             NO_DEFAULT_PATH)
+
+find_library(LLVMLIBSUPPORT
+             NAMES LLVMSupport
+             PATHS ${LLVM_PROJECT_LIB}
+             NO_DEFAULT_PATH)
+
+# libraries are set according to toy/Ch2
+set(MLIRLIBS
+    ${MLIRLIBANALYSIS}
+    ${MLIRLIBIR}
+    ${MLIRLIBPARSER}
+    ${MLIRLIBTRANSFORMS}
+    ${MLIRLIBANALYSIS}
+    ${MLIRLIBVECTOROPS}
+    ${MLIRLIBIR}
+    ${MLIRLIBSUPPORT}
+    ${MLIRLIBSTANDARDOPS}
+    ${LLVMLIBSUPPORT})
+
+# Set up TableGen environment.
+include(${LLVM_PROJECT_ROOT}/build/lib/cmake/llvm/TableGen.cmake)
+
+function(onnf_tablegen ofn)
+  tablegen(MLIR
+           ${ARGV}
+           "-I${MLIR_SRC_INCLUDE_PATH}"
+           "-I${MLIR_BIN_INCLUDE_PATH}")
+  set(TABLEGEN_OUTPUT
+      ${TABLEGEN_OUTPUT} ${CMAKE_CURRENT_BINARY_DIR}/${ofn}
+      PARENT_SCOPE)
+endfunction()
+
+# Import the pre-built mlir TableGen as an imported exetuable. It is required by
+# the LLVM TableGen command to have the TableGen target so that changes to the
+# table gen utility itself can be detected and cause re-compilation of .td file.
+add_executable(mlir-tblgen IMPORTED)
+set_property(TARGET mlir-tblgen
+             PROPERTY IMPORTED_LOCATION
+                      ${LLVM_PROJECT_ROOT}/build/bin/mlir-tblgen)
+set(MLIR_TABLEGEN_EXE mlir-tblgen)
diff --git a/src/builder/CMakeLists.txt b/src/builder/CMakeLists.txt
index 31756ae..8627ae1 100644
--- a/src/builder/CMakeLists.txt
+++ b/src/builder/CMakeLists.txt
@@ -1,84 +1,7 @@
-add_definitions(-DBOOST_LOG_DYN_LINK)
-
 add_library(builder
         sgir.cpp
         )
 
-#Flags to link with LLVM/MLIR libraries
-if(DEFINED ENV{LLVM_PROJECT_ROOT})
-  set(LLVM_PROJECT_ROOT $ENV{LLVM_PROJECT_ROOT})
-  if (EXISTS ${LLVM_PROJECT_ROOT})
-    message(STATUS "LLVM_PROJECT_ROOT " ${LLVM_PROJECT_ROOT})
-  else()
-    message(FATAL_ERROR "The path specified by LLVM_PROJECT_ROOT does not exist: " ${LLVM_PROJECT_ROOT})
-  endif()
-else()
-  message(FATAL_ERROR "env variable LLVM_PROJECT_ROOT not set")
-endif()
-
-if(DEFINED ENV{LLVM_PROJECT_LIB})
-  set(LLVM_PROJECT_LIB $ENV{LLVM_PROJECT_LIB})
-else()
-  set(LLVM_PROJECT_LIB $ENV{LLVM_PROJECT_ROOT}/build/lib)
-endif()
-if (EXISTS ${LLVM_PROJECT_LIB})
-  message(STATUS "LLVM_PROJECT_LIB " ${LLVM_PROJECT_LIB})
-else()
-  message(FATAL_ERROR "The path specified by LLVM_PROJECT_LIB does not exist: " ${LLVM_PROJECT_LIB})
-endif()
-
-#include path
-include_directories(${LLVM_PROJECT_ROOT}/llvm/projects/mlir/include)
-include_directories(${LLVM_PROJECT_ROOT}/llvm/include)
-include_directories(${LLVM_PROJECT_ROOT}/build/include)
-include_directories(${LLVM_PROJECT_ROOT}/build/projects/mlir/include)
-
-find_library(MLIRLIBANALYSIS
-  NAMES MLIRAnalysis
-  PATHS ${LLVM_PROJECT_LIB}
-  NO_DEFAULT_PATH)
-
-find_library(MLIRLIBIR
-  NAMES MLIRIR
-  PATHS ${LLVM_PROJECT_LIB}
-  NO_DEFAULT_PATH)
-
-find_library(MLIRLIBPARSER
-  NAMES MLIRParser
-  PATHS ${LLVM_PROJECT_LIB}
-  NO_DEFAULT_PATH)
-
-find_library(MLIRLIBTRANSFORMS
-  NAMES MLIRTransforms
-  PATHS ${LLVM_PROJECT_LIB}
-  NO_DEFAULT_PATH)
-
-find_library(MLIRLIBVECTOROPS
-  NAMES MLIRVectorOps
-  PATHS ${LLVM_PROJECT_LIB}
-  NO_DEFAULT_PATH)
-
-find_library(MLIRLIBSUPPORT
-  NAMES MLIRSupport
-  PATHS ${LLVM_PROJECT_LIB}
-  NO_DEFAULT_PATH)
-
-find_library(MLIRLIBSTANDARDOPS
-  NAMES MLIRStandardOps
-  PATHS ${LLVM_PROJECT_LIB}
-  NO_DEFAULT_PATH)
-
-find_library(LLVMLIBSUPPORT
-  NAMES LLVMSupport
-  PATHS ${LLVM_PROJECT_LIB}
-  NO_DEFAULT_PATH)
-
-#libraries are set according to toy/Ch2
-set(MLIRLIBS ${MLIRLIBANALYSIS} ${MLIRLIBIR} ${MLIRLIBPARSER} ${MLIRLIBTRANSFORMS}
-  ${MLIRLIBANALYSIS} ${MLIRLIBVECTOROPS} ${MLIRLIBIR} ${MLIRLIBSUPPORT} ${MLIRLIBSTANDARDOPS}
-  ${LLVMLIBSUPPORT})
-
-
 target_link_libraries(builder onnx ${MLIRLIBS} curses)
 target_include_directories(builder
                            PRIVATE
diff --git a/src/builder/sgir.cpp b/src/builder/sgir.cpp
index d6352f7..64eb0ef 100644
--- a/src/builder/sgir.cpp
+++ b/src/builder/sgir.cpp
@@ -157,7 +157,7 @@ class SGIRGenImpl {
     result.addOperands(inputs);
     auto op = builder_.createOperation(result);
     for (int i = 0; i < node.output().size(); i++) {
-      auto r = builder_.createOperation(result)->getResult(i);
+      auto r = op->getResult(i);
       sgir_symbols_.AddMapping(legalize_name(node.output()[i]), r);
     }
 
@@ -212,14 +212,10 @@ class SGIRGenImpl {
 };  // SGIRGenImpl class
 
 }  // namespace
-}  // namespace dlc
+}  // namespace onnf
 
 namespace onnf {
-/*!
- * Generate SGIR with MLIR for a onnx model
- * @param model onnx model.
- * @return module mlir module generated for the onnx model
- */
+
 mlir::OwningModuleRef SGIRImportModel(onnx::ModelProto model) {
   mlir::MLIRContext context;
   SGIRGenImpl mySGIRGen(context);
@@ -229,4 +225,11 @@ mlir::OwningModuleRef SGIRImportModel(onnx::ModelProto model) {
   return module;
 }
 
+mlir::OwningModuleRef SGIRImportModelFile(std::string model_fname) {
+  onnx::ModelProto model;
+  std::fstream input(model_fname, std::ios::in | std::ios::binary);
+
+  auto parse_success = model.ParseFromIstream(&input);
+  return SGIRImportModel(model);
+}
 }  // namespace onnf
diff --git a/src/builder/sgir.hpp b/src/builder/sgir.hpp
index a6f3f08..382b3d2 100644
--- a/src/builder/sgir.hpp
+++ b/src/builder/sgir.hpp
@@ -25,10 +25,16 @@ class OwningModuleRef;
 
 namespace onnf {
 /*!
- *  Import an ONNX Model into SGIR
+ *  Import an ONNX Model into SGIR.
  *  @param model onnx model.
- *  @return MLIR::module generated for the ONNX model
+ *  @return MLIR::module generated for the ONNX model.
  */
 mlir::OwningModuleRef SGIRImportModel(onnx::ModelProto model);
 
+/*!
+ * Import an ONNX Model file into SGIR.
+ * @param model_fname file name pointing to the onnx model protobuf.
+ * @return MLIR::module generated for the ONNX model.
+ */
+mlir::OwningModuleRef SGIRImportModelFile(std::string model_fname);
 }  // namespace onnf
diff --git a/src/compiler/CMakeLists.txt b/src/compiler/CMakeLists.txt
new file mode 100644
index 0000000..2ab4e9b
--- /dev/null
+++ b/src/compiler/CMakeLists.txt
@@ -0,0 +1,28 @@
+add_library(
+        compiler
+        ir/knl/knl_ops.cpp
+        ir/knl/knl_ops.hpp)
+
+# Include root src directory.
+target_include_directories(compiler PRIVATE ../..)
+target_include_directories(compiler PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
+
+find_package(Boost 1.54.0
+        COMPONENTS graph
+        program_options
+        log_setup
+        log
+        system
+        filesystem
+        REQUIRED)
+
+# target_link_libraries(compiler isl inja ${Boost_LIBRARIES})
+target_link_libraries(compiler
+        ${Boost_LIBRARIES}
+        )
+
+set(LLVM_TARGET_DEFINITIONS ir/knl/knl.td)
+onnf_tablegen(knl.hpp.inc -gen-op-decls)
+onnf_tablegen(knl.cpp.inc -gen-op-defs)
+add_public_tablegen_target(gen_kir)
+add_dependencies(compiler gen_kir)
diff --git a/src/compiler/ir/knl/knl.td b/src/compiler/ir/knl/knl.td
new file mode 100644
index 0000000..9ff4758
--- /dev/null
+++ b/src/compiler/ir/knl/knl.td
@@ -0,0 +1,27 @@
+include "mlir/IR/OpBase.td"
+
+def Knl_Dialect : Dialect {
+  let name = "knl";
+  let cppNamespace = "";
+}
+
+def KnlIterate : Op<Knl_Dialect, "iterate"> {
+  let summary = "iterate operation";
+  let description = [{
+
+    The "knl.iterate" operation is conceptually equivalent to a nested for loop
+    in that it represents ordered interation of integer coordinates within an
+    affine integer set.
+
+  }];
+
+  let arguments = (ins Variadic<AnyType>);
+  let regions = (region SizedRegion<1>:$region);
+
+  let skipDefaultBuilders = 1;
+
+  let builders = [
+    OpBuilder<"Builder *builder, OperationState &result, "
+              "IntegerSet set, ArrayRef<Value *> args">
+  ];
+}
\ No newline at end of file
diff --git a/src/compiler/ir/knl/knl_ops.cpp b/src/compiler/ir/knl/knl_ops.cpp
new file mode 100644
index 0000000..1d865c8
--- /dev/null
+++ b/src/compiler/ir/knl/knl_ops.cpp
@@ -0,0 +1,23 @@
+#include "llvm/ADT/SetVector.h"
+#include "llvm/ADT/SmallBitVector.h"
+#include "mlir/IR/Block.h"
+#include "mlir/IR/Builders.h"
+#include "mlir/IR/Function.h"
+#include "mlir/IR/IntegerSet.h"
+#include "mlir/IR/Matchers.h"
+#include "mlir/IR/OpImplementation.h"
+#include "mlir/IR/PatternMatch.h"
+
+#include "knl_ops.hpp"
+
+namespace mlir {
+KnlOpsDialect::KnlOpsDialect(MLIRContext* context)
+    : Dialect(getDialectNamespace(), context) {
+  addOperations<
+#define GET_OP_LIST
+#include "knl.cpp.inc"
+      >();
+}
+}  // namespace mlir
+
+namespace onnf {}
diff --git a/src/compiler/ir/knl/knl_ops.hpp b/src/compiler/ir/knl/knl_ops.hpp
new file mode 100644
index 0000000..6ec7a86
--- /dev/null
+++ b/src/compiler/ir/knl/knl_ops.hpp
@@ -0,0 +1,19 @@
+#pragma once
+
+#include "mlir/IR/Builders.h"
+#include "mlir/IR/Dialect.h"
+#include "mlir/IR/OpDefinition.h"
+#include "mlir/IR/StandardTypes.h"
+
+namespace mlir {
+class KnlOpsDialect : public Dialect {
+ public:
+  KnlOpsDialect(MLIRContext* context);
+  static StringRef getDialectNamespace() { return "knl"; }
+};
+
+#define GET_OP_CLASSES
+#include "knl.hpp.inc"
+}  // namespace mlir
+
+namespace onnf {}
diff --git a/src/main.cpp b/src/main.cpp
index 764d012..7e22aea 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -20,6 +20,10 @@
 
 #include <boost/program_options.hpp>
 
+#include "src/builder/sgir.hpp"
+
+#include "mlir/IR/Module.h"
+
 using namespace std;
 
 int main(int ac, char* av[]) {
@@ -40,5 +44,8 @@ int main(int ac, char* av[]) {
     return 0;
   }
 
+  string model_filename = vm["onnx-model"].as<string>();
+  auto module = SGIRImportModelFile(model_filename);
+
   return 0;
 }