diff --git a/.github/workflows/clang-tests.yml b/.github/workflows/clang-tests.yml
--- a/.github/workflows/clang-tests.yml
+++ b/.github/workflows/clang-tests.yml
@@ -6,13 +6,15 @@
       - 'release/**'
     paths:
       - 'clang/**'
-      - 'llvm/**'
       - '.github/workflows/clang-tests.yml'
+      - '.github/workflows/llvm-project-tests.yml'
+      - '!llvm/**'
   pull_request:
     paths:
       - 'clang/**'
-      - 'llvm/**'
       - '.github/workflows/clang-tests.yml'
+      - '.github/workflows/llvm-project-tests.yml'
+      - '!llvm/**'
 
 concurrency:
   # Skip intermediate builds: always.
@@ -21,29 +23,9 @@
   cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
 
 jobs:
-  build_clang:
-    name: clang check-all
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os:
-          - ubuntu-latest
-          - windows-latest
-          - macOS-latest
-    steps:
-    - name: Setup Windows
-      if: startsWith(matrix.os, 'windows')
-      uses: llvm/actions/setup-windows@main
-      with:
-        arch: amd64
-    - name: Install Ninja
-      uses: llvm/actions/install-ninja@main
-    - uses: actions/checkout@v1
-      with:
-        fetch-depth: 250
-    - name: Test clang
-      uses: llvm/actions/build-test-llvm-project@main
-      with:
-        cmake_args: -G Ninja  -DLLVM_ENABLE_PROJECTS="clang" -DCMAKE_BUILD_TYPE=Release
-        build_target: check-clang
+  check_clang:
+    name: Test clang,lldb,libclc
+    uses: tstellar/llvm-project/.github/workflows/llvm-project-tests.yml@release/14.x
+    with:
+      build_target: check-clang
+      projects: clang;lldb;libclc
diff --git a/.github/workflows/libclc-tests.yml b/.github/workflows/libclc-tests.yml
--- a/.github/workflows/libclc-tests.yml
+++ b/.github/workflows/libclc-tests.yml
@@ -5,16 +5,18 @@
     branches:
       - 'release/**'
     paths:
-      - 'clang/**'
-      - 'llvm/**'
       - 'libclc/**'
       - '.github/workflows/libclc-tests.yml'
+      - '.github/workflows/llvm-project-tests.yml'
+      - '!clang/**'
+      - '!llvm/**'
   pull_request:
     paths:
-      - 'clang/**'
-      - 'llvm/**'
       - 'libclc/**'
       - '.github/workflows/libclc-tests.yml'
+      - '.github/workflows/llvm-project-tests.yml'
+      - '!clang/**'
+      - '!llvm/**'
 
 concurrency:
   # Skip intermediate builds: always.
@@ -22,39 +24,10 @@
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
 
-
 jobs:
-  build_libclc:
-    name: libclc test
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os:
-          - ubuntu-latest
-          # Disable build on windows, because I can't figure out where llvm-config is.
-          #- windows-latest
-          - macOS-latest
-    steps:
-    - name: Setup Windows
-      if: startsWith(matrix.os, 'windows')
-      uses: llvm/actions/setup-windows@main
-      with:
-        arch: amd64
-    - name: Install Ninja
-      uses: llvm/actions/install-ninja@main
-    - uses: actions/checkout@v1
-      with:
-        fetch-depth: 250
-    - name: Build clang
-      uses: llvm/actions/build-test-llvm-project@main
-      with:
-        cmake_args: -G Ninja  -DLLVM_ENABLE_PROJECTS="clang" -DCMAKE_BUILD_TYPE=Release
-        build_target: ""
-    - name: Build and test libclc
-      # spirv targets require llvm-spirv, so skip building them until we figure out
-      # how to install this tool.
-      run: |
-        cmake -G Ninja -S libclc -B libclc-build -DLLVM_CONFIG=`pwd`/build/bin/llvm-config -DLIBCLC_TARGETS_TO_BUILD="amdgcn--;amdgcn--amdhsa;r600--;nvptx--;nvptx64--;nvptx--nvidiacl;nvptx64--nvidiacl"
-        ninja -C libclc-build
-        ninja -C libclc-build test
+  check_libclc:
+    name: Test libclc
+    uses: tstellar/llvm-project/.github/workflows/llvm-project-tests.yml@release/14.x
+    with:
+      build_target: ''
+      projects: clang;libclc
diff --git a/.github/workflows/lld-tests.yml b/.github/workflows/lld-tests.yml
--- a/.github/workflows/lld-tests.yml
+++ b/.github/workflows/lld-tests.yml
@@ -6,13 +6,15 @@
       - 'release/**'
     paths:
       - 'lld/**'
-      - 'llvm/**'
       - '.github/workflows/lld-tests.yml'
+      - '.github/workflows/llvm-project-tests.yml'
+      - '!llvm/**'
   pull_request:
     paths:
       - 'lld/**'
-      - 'llvm/**'
       - '.github/workflows/lld-tests.yml'
+      - '.github/workflows/llvm-project-tests.yml'
+      - '!llvm/**'
 
 concurrency:
   # Skip intermediate builds: always.
@@ -21,29 +23,9 @@
   cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
 
 jobs:
-  build_lld:
-    name: lld check-all
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os:
-          - ubuntu-latest
-          - windows-latest
-          - macOS-latest
-    steps:
-    - name: Setup Windows
-      if: startsWith(matrix.os, 'windows')
-      uses: llvm/actions/setup-windows@main
-      with:
-        arch: amd64
-    - name: Install Ninja
-      uses: llvm/actions/install-ninja@main
-    - uses: actions/checkout@v1
-      with:
-        fetch-depth: 250
-    - name: Test lld
-      uses: llvm/actions/build-test-llvm-project@main
-      with:
-        cmake_args: -G Ninja  -DLLVM_ENABLE_PROJECTS="lld" -DCMAKE_BUILD_TYPE=Release
-        build_target: check-lld
+  check_lld:
+    name: Test lld
+    uses: tstellar/llvm-project/.github/workflows/llvm-project-tests.yml@release/14.x
+    with:
+      build_target: check-lld
+      projects: lld
diff --git a/.github/workflows/lldb-tests.yml b/.github/workflows/lldb-tests.yml
--- a/.github/workflows/lldb-tests.yml
+++ b/.github/workflows/lldb-tests.yml
@@ -5,16 +5,18 @@
     branches:
       - 'release/**'
     paths:
-      - 'clang/**'
-      - 'llvm/**'
       - 'lldb/**'
       - '.github/workflows/lldb-tests.yml'
+      - '.github/workflows/llvm-project-tests.yml'
+      - '!clang/**'
+      - '!llvm/**'
   pull_request:
     paths:
-      - 'clang/**'
-      - 'llvm/**'
       - 'lldb/**'
       - '.github/workflows/lldb-tests.yml'
+      - '.github/workflows/llvm-project-tests.yml'
+      - '!clang/**'
+      - '!llvm/**'
 
 concurrency:
   # Skip intermediate builds: always.
@@ -25,33 +27,8 @@
 
 jobs:
   build_lldb:
-    name: lldb build
-    runs-on: ${{ matrix.os }}
-    # Workaround for build faliure on Mac OS X: llvm.org/PR46190, https://github.com/actions/virtual-environments/issues/2274
-    env:
-      CPLUS_INCLUDE_PATH: /usr/local/opt/llvm/include/c++/v1:/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include
-    strategy:
-      fail-fast: false
-      matrix:
-        os:
-          - ubuntu-latest
-          - windows-latest
-          - macOS-10.15
-    steps:
-    - name: Setup Windows
-      if: startsWith(matrix.os, 'windows')
-      uses: llvm/actions/setup-windows@main
-      with:
-        arch: amd64
-    - name: Install Ninja
-      uses: llvm/actions/install-ninja@main
-    - uses: actions/checkout@v1
-      with:
-        fetch-depth: 250
-    - name: Build lldb
-      uses: llvm/actions/build-test-llvm-project@main
-      with:
-        # Mac OS requries that libcxx is enabled for lldb tests, so we need  to disable them.
-        cmake_args: -G Ninja  -DLLVM_ENABLE_PROJECTS="clang;lldb" -DCMAKE_BUILD_TYPE=Release -DLLDB_INCLUDE_TESTS=OFF
-        # check-lldb is not consistent, so we only build lldb.
-        build_target: ""
+    name: Build lldb
+    uses: tstellar/llvm-project/.github/workflows/llvm-project-tests.yml@release/14.x
+    with:
+      build_target: ''
+      projects: clang;lldb
diff --git a/.github/workflows/llvm-project-tests.yml b/.github/workflows/llvm-project-tests.yml
new file mode 100644
--- /dev/null
+++ b/.github/workflows/llvm-project-tests.yml
@@ -0,0 +1,62 @@
+name: LLVM Project Tests
+
+on:
+  workflow_call:
+    inputs:
+      build_target:
+        required: true
+        type: string
+
+      projects:
+        required: true
+        type: string
+
+concurrency:
+  # Skip intermediate builds: always.
+  # Cancel intermediate builds: only if it is a pull request build.
+  # If the group name here is the same as the group name in the workflow that includes
+  # this one, then the action will try to wait on itself and get stuck.
+  group: llvm-project-${{ github.workflow }}-${{ inputs.projects}}${{ github.ref }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
+env:
+  # Workaround for build faliure on Mac OS X: llvm.org/PR46190, https://github.com/actions/virtual-environments/issues/2274
+  CPLUS_INCLUDE_PATH: /usr/local/opt/llvm/include/c++/v1:/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include
+
+jobs:
+  lit-tests:
+    name: Lit Tests
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          - windows-latest
+          # Use a specific version of macOS to ensure the CPLUS_INCLUDE_PATH workaround works.
+          - macOS-10.15
+    steps:
+      - name: Setup Windows
+        if: startsWith(matrix.os, 'windows')
+        uses: llvm/actions/setup-windows@main
+        with:
+          arch: amd64
+      - name: Install Ninja
+        uses: llvm/actions/install-ninja@main
+      - uses: actions/checkout@v1
+        with:
+          fetch-depth: 250
+      - name: Build and Test
+        uses: llvm/actions/build-test-llvm-project@main
+        with:
+          cmake_args: '-GNinja -DLLVM_ENABLE_PROJECTS="${{ inputs.projects }}" -DCMAKE_BUILD_TYPE=Release -DLLDB_INCLUDE_TESTS=OFF'
+          build_target:  '${{ inputs.build_target }}'
+
+      - name: Build and Test libclc
+        if: "!startsWith(matrix.os, 'windows') && contains(inputs.projects, 'libclc')"
+        run: |
+          # Make sure all of LLVM libraries that llvm-config needs are built.
+          ninja -C build
+          cmake -G Ninja -S libclc -B libclc-build -DLLVM_CONFIG=`pwd`/build/bin/llvm-config -DLIBCLC_TARGETS_TO_BUILD="amdgcn--;amdgcn--amdhsa;r600--;nvptx--;nvptx64--;nvptx--nvidiacl;nvptx64--nvidiacl"
+          ninja -C libclc-build
+          ninja -C libclc-build test
diff --git a/.github/workflows/llvm-tests.yml b/.github/workflows/llvm-tests.yml
--- a/.github/workflows/llvm-tests.yml
+++ b/.github/workflows/llvm-tests.yml
@@ -7,10 +7,12 @@
     paths:
       - 'llvm/**'
       - '.github/workflows/llvm-tests.yml'
+      - '.github/workflows/llvm-project-tests.yml'
   pull_request:
     paths:
       - 'llvm/**'
       - '.github/workflows/llvm-tests.yml'
+      - '.github/workflows/llvm-project-tests.yml'
 
 concurrency:
   # Skip intermediate builds: always.
@@ -20,31 +22,28 @@
 
 
 jobs:
-  build_llvm:
-    name: llvm check-all
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os:
-          - ubuntu-latest
-          - windows-latest
-          - macOS-latest
-    steps:
-    - name: Setup Windows
-      if: startsWith(matrix.os, 'windows')
-      uses: llvm/actions/setup-windows@main
-      with:
-        arch: amd64
-    - name: Install Ninja
-      uses: llvm/actions/install-ninja@main
-    - uses: actions/checkout@v1
-      with:
-        fetch-depth: 250
-    - name: Test llvm
-      uses: llvm/actions/build-test-llvm-project@main
-      with:
-        cmake_args: -G Ninja -DCMAKE_BUILD_TYPE=Release
+  check_all:
+    name: Test llvm,clang,libclc
+    uses: tstellar/llvm-project/.github/workflows/llvm-project-tests.yml@release/14.x
+    with:
+      build_target: check-all
+      projects: clang;libclc
+
+  # These need to be separate from the check_all job, becuase there is not enough disk
+  # space to build all these projects on Windows.
+  build_lldb:
+    name: Build lldb
+    uses: tstellar/llvm-project/.github/workflows/llvm-project-tests.yml@release/14.x
+    with:
+      build_target: ''
+      projects: clang;lldb
+
+  check_lld:
+    name: Test lld
+    uses: tstellar/llvm-project/.github/workflows/llvm-project-tests.yml@release/14.x
+    with:
+      build_target: check-lld
+      projects: lld
 
   abi-dump-setup:
     runs-on: ubuntu-latest