diff --git a/.github/workflows/build_and_test_cmake.yml b/.github/workflows/build_and_test_cmake.yml
index a257c48..78d51db 100644
--- a/.github/workflows/build_and_test_cmake.yml
+++ b/.github/workflows/build_and_test_cmake.yml
@@ -29,6 +29,14 @@ jobs:
             ./externals/llvm-project
           key: ${{ runner.os }}-cmake-${{ hashFiles('bazel/import_llvm.bzl') }}-${{ hashFiles('**/CMakeLists.txt') }}
 
+      - name: Cache mlir-tutorial build
+        id: cache-mlir-tutorial
+        uses: actions/cache@v3
+        with:
+          path: |
+            ./build
+          key: ${{ runner.os }}-cmake-${{ hashFiles('bazel/import_llvm.bzl') }}-${{ hashFiles('**/CMakeLists.txt') }}
+
       - name: Git config
         run: |
           git config --global --add safe.directory ${GITHUB_WORKSPACE}
@@ -47,9 +55,10 @@ jobs:
       - name: Build and test mlir-tutorial
         run: |
           mkdir build && cd build
-          cmake -DLLVM_DIR=${GITHUB_WORKSPACE}/externals/llvm-project/build/lib/cmake/llvm -DMLIR_DIR=${GITHUB_WORKSPACE}/externals/llvm-project/build/lib/cmake/mlir ..
+          cmake -DLLVM_DIR=${GITHUB_WORKSPACE}/externals/llvm-project/build/lib/cmake/llvm -DMLIR_DIR=${GITHUB_WORKSPACE}/externals/llvm-project/build/lib/cmake/mlir -DBUILD_DEPS="ON" ..
           cmake --build . --target MLIRAffineFullUnrollPasses
           cmake --build . --target MLIRMulToAddPasses
+          cmake --build . --target MLIRNoisyPasses
           cmake --build . --target mlir-headers
           cmake --build . --target tutorial-opt
           cmake --build . --target check-mlir-tutorial
diff --git a/.gitignore b/.gitignore
index 36802d6..258a6a8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,9 +4,6 @@ bazel-mlir-tutorial
 bazel-out
 bazel-testlogs
 
-# git submodule
-externals
-
 # cmake related files
 # ignore the user specified CMake presets in subproject directories.
 /*/CMakeUserPresets.json
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 56aab9f..46b2d9b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,6 +22,16 @@ include_directories(${PROJECT_SOURCE_DIR})
 include_directories(${PROJECT_SOURCE_DIR}/externals/llvm-project)
 include_directories(${PROJECT_BINARY_DIR})
 
+message(STATUS "Fetching or-tools...")
+include(FetchContent)
+FetchContent_Declare(
+  or-tools
+  GIT_REPOSITORY https://github.com/google/or-tools.git
+  GIT_TAG        main
+)
+FetchContent_MakeAvailable(or-tools)
+message(STATUS "Done fetching or-tools")
+
 add_subdirectory(tests)
 add_subdirectory(tools)
-add_subdirectory(lib)
\ No newline at end of file
+add_subdirectory(lib)
diff --git a/README.md b/README.md
index a894731..bd82a31 100644
--- a/README.md
+++ b/README.md
@@ -1,33 +1,32 @@
 # MLIR For Beginners
 
-This is the code repository for a series of articles
-on the [MLIR framework](https://mlir.llvm.org/) for building compilers.
+This is the code repository for a series of articles on the
+[MLIR framework](https://mlir.llvm.org/) for building compilers.
 
 ## Articles
 
-1. [Build System (Getting Started)](https://jeremykun.com/2023/08/10/mlir-getting-started/)
-2. [Running and Testing a Lowering](https://jeremykun.com/2023/08/10/mlir-running-and-testing-a-lowering/)
-3. [Writing Our First Pass](https://jeremykun.com/2023/08/10/mlir-writing-our-first-pass/)
-4. [Using Tablegen for Passes](https://jeremykun.com/2023/08/10/mlir-using-tablegen-for-passes/)
-5. [Defining a New Dialect](https://jeremykun.com/2023/08/21/mlir-defining-a-new-dialect/)
-6. [Using Traits](https://jeremykun.com/2023/09/07/mlir-using-traits/)
-7. [Folders and Constant Propagation](https://jeremykun.com/2023/09/11/mlir-folders/)
-8. [Verifiers](https://jeremykun.com/2023/09/13/mlir-verifiers/)
-9. [Canonicalizers and Declarative Rewrite Patterns](https://jeremykun.com/2023/09/20/mlir-canonicalizers-and-declarative-rewrite-patterns/)
+1.  [Build System (Getting Started)](https://jeremykun.com/2023/08/10/mlir-getting-started/)
+2.  [Running and Testing a Lowering](https://jeremykun.com/2023/08/10/mlir-running-and-testing-a-lowering/)
+3.  [Writing Our First Pass](https://jeremykun.com/2023/08/10/mlir-writing-our-first-pass/)
+4.  [Using Tablegen for Passes](https://jeremykun.com/2023/08/10/mlir-using-tablegen-for-passes/)
+5.  [Defining a New Dialect](https://jeremykun.com/2023/08/21/mlir-defining-a-new-dialect/)
+6.  [Using Traits](https://jeremykun.com/2023/09/07/mlir-using-traits/)
+7.  [Folders and Constant Propagation](https://jeremykun.com/2023/09/11/mlir-folders/)
+8.  [Verifiers](https://jeremykun.com/2023/09/13/mlir-verifiers/)
+9.  [Canonicalizers and Declarative Rewrite Patterns](https://jeremykun.com/2023/09/20/mlir-canonicalizers-and-declarative-rewrite-patterns/)
 10. [Dialect Conversion](https://jeremykun.com/2023/10/23/mlir-dialect-conversion/)
 11. [Lowering through LLVM](https://jeremykun.com/2023/11/01/mlir-lowering-through-llvm/)
 
-
 ## Bazel build
 
 Bazel is one of two supported build systems for this tutorial. The other is
 CMake. If you're unfamiliar with Bazel, you can read the tutorials at
 [https://bazel.build/start](https://bazel.build/start). Familiarity with Bazel
 is not required to build or test, but it is required to follow the articles in
-the tutorial series and explained in the first article, [Build System (Getting
-Started)](https://jeremykun.com/2023/08/10/mlir-getting-started/). The CMake
-build is maintained, but was added at article 10 (Dialect Conversion) and will
-not be explained in the articles.
+the tutorial series and explained in the first article,
+[Build System (Getting Started)](https://jeremykun.com/2023/08/10/mlir-getting-started/).
+The CMake build is maintained, but was added at article 10 (Dialect Conversion)
+and will not be explained in the articles.
 
 ### Prerequisites
 
@@ -51,16 +50,16 @@ bazel test ...:all
 
 CMake is one of two supported build systems for this tutorial. The other is
 Bazel. If you're unfamiliar with CMake, you can read the tutorials at
-[https://cmake.org/getting-started/](https://cmake.org/getting-started/).
-The CMake build is maintained, but was added at article 10 (Dialect Conversion)
-and will not be explained in the articles.
+[https://cmake.org/getting-started/](https://cmake.org/getting-started/). The
+CMake build is maintained, but was added at article 10 (Dialect Conversion) and
+will not be explained in the articles.
 
 ### Prerequisites
 
-* Make sure you have installed everything needed to build LLVM
-https://llvm.org/docs/GettingStarted.html#software
-* For this recipe Ninja is used so be sure to have it as well installed
-https://github.com/ninja-build/ninja/wiki/Pre-built-Ninja-packages
+*   Make sure you have installed everything needed to build LLVM
+    https://llvm.org/docs/GettingStarted.html#software
+*   For this recipe Ninja is used so be sure to have it as well installed
+    https://github.com/ninja-build/ninja/wiki/Pre-built-Ninja-packages
 
 ### Checking out the code
 
@@ -128,15 +127,18 @@ mkdir $BUILD_DIR
 pushd $BUILD_DIR
 
 LLVM_BUILD_DIR=externals/llvm-project/build
+ORTOOLS_BUILD_DIR=externals/llvm-project/build
 cmake -G $BUILD_SYSTEM .. \
     -DLLVM_DIR="$LLVM_BUILD_DIR/lib/cmake/llvm" \
     -DMLIR_DIR="$LLVM_BUILD_DIR/lib/cmake/mlir" \
+    -DBUILD_DEPS="ON" \
     -DCMAKE_BUILD_TYPE=Debug
 
 popd
 
 cmake --build $BUILD_DIR --target MLIRAffineFullUnrollPasses
 cmake --build $BUILD_DIR --target MLIRMulToAddPasses
+cmake --build $BUILD_DIR --target MLIRNoisyPasses
 cmake --build $BUILD_DIR --target mlir-headers
 cmake --build $BUILD_DIR --target mlir-doc
 cmake --build $BUILD_DIR --target tutorial-opt
diff --git a/externals/llvm-project b/externals/llvm-project
index 896749a..f778eaf 160000
--- a/externals/llvm-project
+++ b/externals/llvm-project
@@ -1 +1 @@
-Subproject commit 896749aa0d420ae573255a64a349bc2a76cfed37
+Subproject commit f778eafdd878e8b11ad76f9e0a312ce7791a7481
diff --git a/lib/Analysis/CMakeLists.txt b/lib/Analysis/CMakeLists.txt
new file mode 100644
index 0000000..a52d48b
--- /dev/null
+++ b/lib/Analysis/CMakeLists.txt
@@ -0,0 +1 @@
+add_subdirectory(ReduceNoiseAnalysis)
diff --git a/lib/Analysis/ReduceNoiseAnalysis/CMakeLists.txt b/lib/Analysis/ReduceNoiseAnalysis/CMakeLists.txt
new file mode 100644
index 0000000..99cb75f
--- /dev/null
+++ b/lib/Analysis/ReduceNoiseAnalysis/CMakeLists.txt
@@ -0,0 +1,7 @@
+add_mlir_library(ReduceNoiseAnalysis
+    ReduceNoiseAnalysis.cpp
+
+    ${PROJECT_SOURCE_DIR}/lib/Analysis/ReduceNoiseAnalysis/
+    ADDITIONAL_HEADER_DIRS
+    LINK_LIBS PUBLIC
+)
diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt
index 714031d..c1572fe 100644
--- a/lib/CMakeLists.txt
+++ b/lib/CMakeLists.txt
@@ -1,3 +1,4 @@
-add_subdirectory(Dialect)
+add_subdirectory(Analysis)
 add_subdirectory(Conversion)
+add_subdirectory(Dialect)
 add_subdirectory(Transform)
diff --git a/lib/Dialect/CMakeLists.txt b/lib/Dialect/CMakeLists.txt
index aff4d19..1f27a0f 100644
--- a/lib/Dialect/CMakeLists.txt
+++ b/lib/Dialect/CMakeLists.txt
@@ -1 +1,2 @@
-add_subdirectory(Poly)
\ No newline at end of file
+add_subdirectory(Noisy)
+add_subdirectory(Poly)
diff --git a/lib/Dialect/Noisy/CMakeLists.txt b/lib/Dialect/Noisy/CMakeLists.txt
index 5e38757..41fe14e 100644
--- a/lib/Dialect/Noisy/CMakeLists.txt
+++ b/lib/Dialect/Noisy/CMakeLists.txt
@@ -12,10 +12,6 @@ add_dependencies(mlir-headers MLIRNoisyOpsIncGen)
 
 add_mlir_doc(NoisyDialect NoisyDialect Noisy/ -gen-dialect-doc)
 
-set(LLVM_TARGET_DEFINITIONS NoisyPatterns.td)
-mlir_tablegen(NoisyCanonicalize.cpp.inc -gen-rewriters)
-add_public_tablegen_target(MLIRNoisyCanonicalizationIncGen)
-
 add_mlir_dialect_library(MLIRNoisy
     NoisyDialect.cpp
     NoisyOps.cpp
diff --git a/lib/Transform/CMakeLists.txt b/lib/Transform/CMakeLists.txt
index 9caa085..5534bc3 100644
--- a/lib/Transform/CMakeLists.txt
+++ b/lib/Transform/CMakeLists.txt
@@ -1,2 +1,3 @@
 add_subdirectory(Affine)
-add_subdirectory(Arith)
\ No newline at end of file
+add_subdirectory(Arith)
+add_subdirectory(Noisy)
diff --git a/lib/Transform/Noisy/CMakeLists.txt b/lib/Transform/Noisy/CMakeLists.txt
new file mode 100644
index 0000000..df76aa6
--- /dev/null
+++ b/lib/Transform/Noisy/CMakeLists.txt
@@ -0,0 +1,14 @@
+add_mlir_library(NoisyPasses
+    ReduceNoiseOptimizer.cpp
+
+    ${PROJECT_SOURCE_DIR}/lib/Transform/Noisy/
+    ADDITIONAL_HEADER_DIRS
+
+    LINK_LIBS PUBLIC
+    ReduceNoiseAnalysis
+)
+
+set(LLVM_TARGET_DEFINITIONS Passes.td)
+mlir_tablegen(Passes.h.inc -gen-pass-decls -name Noisy)
+add_public_tablegen_target(MLIRNoisyPasses)
+add_mlir_doc(Passes NoisyPasses ./ -gen-pass-doc)
diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt
index 59f33b1..8cd5559 100644
--- a/tools/CMakeLists.txt
+++ b/tools/CMakeLists.txt
@@ -4,12 +4,15 @@ get_property(conversion_libs GLOBAL PROPERTY MLIR_CONVERSION_LIBS)
 set (LIBS
     ${dialect_libs}
     ${conversion_libs}
-    MLIRPoly
     AffineFullUnroll
-    MulToAdd
+    MLIRNoisy
     MLIROptLib
     MLIRPass
+    MLIRPoly
+    MulToAdd
+    NoisyPasses
     PolyToStandard
+    ortools::ortools
 )
 
 add_llvm_executable(tutorial-opt tutorial-opt.cpp)