diff --git a/.github/workflows/clang-tests.yml b/.github/workflows/clang-tests.yml
new file mode 100644
--- /dev/null
+++ b/.github/workflows/clang-tests.yml
@@ -0,0 +1,37 @@
+name: Clang Tests
+
+on:
+  workflow_dispatch:
+  push:
+    ignore-forks: true
+    branches:
+      - 'release/**'
+    paths:
+      - 'clang/**'
+      - '.github/workflows/clang-tests.yml'
+      - '.github/workflows/llvm-project-tests.yml'
+      - '!llvm/**'
+  pull_request:
+    ignore-forks: true
+    branches:
+      - 'release/**'
+    paths:
+      - 'clang/**'
+      - '.github/workflows/clang-tests.yml'
+      - '.github/workflows/llvm-project-tests.yml'
+      - '!llvm/**'
+
+concurrency:
+  # Skip intermediate builds: always.
+  # Cancel intermediate builds: only if it is a pull request build.
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
+jobs:
+  check_clang:
+    if: github.repository_owner == 'llvm'
+    name: Test clang,lldb,libclc
+    uses: ./.github/workflows/llvm-project-tests.yml
+    with:
+      build_target: check-clang
+      projects: clang;lldb;libclc
diff --git a/.github/workflows/libclang-abi-tests.yml b/.github/workflows/libclang-abi-tests.yml
new file mode 100644
--- /dev/null
+++ b/.github/workflows/libclang-abi-tests.yml
@@ -0,0 +1,168 @@
+name: libclang ABI Tests
+
+on:
+  workflow_dispatch:
+  push:
+    ignore-forks: true
+    branches:
+      - 'release/**'
+    paths:
+      - 'clang/**'
+      - '.github/workflows/libclang-abi-tests.yml'
+  pull_request:
+    ignore-forks: true
+    branches:
+      - 'release/**'
+    paths:
+      - 'clang/**'
+      - '.github/workflows/libclang-abi-tests.yml'
+
+concurrency:
+  # Skip intermediate builds: always.
+  # Cancel intermediate builds: only if it is a pull request build.
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
+
+jobs:
+  abi-dump-setup:
+    if: github.repository_owner == 'llvm'
+    runs-on: ubuntu-latest
+    outputs:
+      BASELINE_REF: ${{ steps.vars.outputs.BASELINE_REF }}
+      ABI_HEADERS: ${{ steps.vars.outputs.ABI_HEADERS }}
+      ABI_LIBS: ${{ steps.vars.outputs.ABI_LIBS }}
+      BASELINE_VERSION_MAJOR: ${{ steps.vars.outputs.BASELINE_VERSION_MAJOR }}
+      BASELINE_VERSION_MINOR: ${{ steps.vars.outputs.BASELINE_VERSION_MINOR }}
+      LLVM_VERSION_MAJOR: ${{ steps.version.outputs.LLVM_VERSION_MAJOR }}
+      LLVM_VERSION_MINOR: ${{ steps.version.outputs.LLVM_VERSION_MINOR }}
+      LLVM_VERSION_PATCH: ${{ steps.version.outputs.LLVM_VERSION_PATCH }}
+    steps:
+      - name: Checkout source
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 250
+
+      - name: Get LLVM version
+        id: version
+        uses: llvm/actions/get-llvm-version@main
+
+      - name: Setup Variables
+        id: vars
+        run: |
+          minor_version=0
+          remote_repo='https://github.com/llvm/llvm-project'
+          if [ ${{ steps.version.outputs.LLVM_VERSION_MINOR }} -ne 0 -o ${{ steps.version.outputs.LLVM_VERSION_PATCH }} -eq 0 ]; then
+            major_version=$(( ${{ steps.version.outputs.LLVM_VERSION_MAJOR }} - 1))
+            baseline_ref="llvmorg-$major_version.0.0"
+
+            # If there is a minor release, we want to use that as the base line.
+            minor_ref=`git ls-remote --refs -t $remote_repo llvmorg-$major_version.[1-9].[0-9] | tail -n1 | grep -o 'llvmorg-.\+' || true`
+            if [ -n "$minor_ref" ]; then
+               baseline_ref=$minor_ref
+            else
+              # Check if we have a release candidate
+              rc_ref=`git ls-remote --refs -t $remote_repo llvmorg-$major_version.[1-9].[0-9]-rc* | tail -n1 | grep -o 'llvmorg-.\+' || true`
+              if [ -n "$rc_ref" ]; then
+                baseline_ref=$rc_ref
+              fi
+            fi
+            echo ::set-output name=BASELINE_VERSION_MAJOR::$major_version
+            echo ::set-output name=BASELINE_REF::$baseline_ref
+            echo ::set-output name=ABI_HEADERS::clang-c
+            echo ::set-output name=ABI_LIBS::libclang.so
+          else
+            echo ::set-output name=BASELINE_VERSION_MAJOR::${{ steps.version.outputs.LLVM_VERSION_MAJOR }}
+            echo ::set-output name=BASELINE_REF::llvmorg-${{ steps.version.outputs.LLVM_VERSION_MAJOR }}.0.0
+            echo ::set-output name=ABI_HEADERS::.
+            echo ::set-output name=ABI_LIBS::libclang.so libclang-cpp.so
+          fi
+
+
+  abi-dump:
+    if: github.repository_owner == 'llvm'
+    needs: abi-dump-setup
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        name:
+          - build-baseline
+          - build-latest
+        include:
+          - name: build-baseline
+            llvm_version_major: ${{ needs.abi-dump-setup.outputs.BASELINE_VERSION_MAJOR }}
+            ref: ${{ needs.abi-dump-setup.outputs.BASELINE_REF }}
+            repo: llvm/llvm-project
+          - name: build-latest
+            llvm_version_major: ${{ needs.abi-dump-setup.outputs.LLVM_VERSION_MAJOR }}
+            ref: ${{ github.sha }}
+            repo: ${{ github.repository }}
+    steps:
+    - name: Install Ninja
+      uses: llvm/actions/install-ninja@main
+    - name: Install abi-compliance-checker
+      run: |
+        sudo apt-get install abi-dumper autoconf pkg-config
+    - name: Install universal-ctags
+      run: |
+        git clone https://github.com/universal-ctags/ctags.git
+        cd ctags
+        ./autogen.sh
+        ./configure
+        sudo make install
+    - name: Download source code
+      uses: llvm/actions/get-llvm-project-src@main
+      with:
+        ref: ${{ matrix.ref }}
+        repo: ${{ matrix.repo }}
+    - name: Configure
+      run: |
+        mkdir install
+        cmake -B build -S llvm -G Ninja -DLLVM_ENABLE_PROJECTS=clang -DCMAKE_BUILD_TYPE=Debug -DLLVM_TARGETS_TO_BUILD="" -DLLVM_BUILD_LLVM_DYLIB=ON -DLLVM_LINK_LLVM_DYLIB=ON -DCMAKE_C_FLAGS_DEBUG="-g1 -Og" -DCMAKE_CXX_FLAGS_DEBUG="-g1 -Og" -DCMAKE_INSTALL_PREFIX=`pwd`/install llvm
+    - name: Build
+      run: ninja -C build/ ${{ needs.abi-dump-setup.outputs.ABI_LIBS }} install-clang-headers
+    - name: Dump ABI
+      run: |
+        parallel abi-dumper -lver ${{ matrix.ref }} -skip-cxx -public-headers ./install/include/${{ needs.abi-dump-setup.outputs.ABI_HEADERS }} -o {}-${{ matrix.ref }}.abi ./build/lib/{} ::: ${{ needs.abi-dump-setup.outputs.ABI_LIBS }}
+        # Remove symbol versioning from dumps, so we can compare across major
+        # versions.  We don't need to do this for libclang.so since its ABI
+        # is stable across major releases and the symbol versions don't change.
+        if [ -e libclang-cpp.so-${{ matrix.ref }}.abi ]; then
+          sed -i 's/LLVM_[0-9]\+/LLVM_NOVERSION/' libclang-cpp.so-${{ matrix.ref }}.abi
+        fi
+    - name: Upload ABI file
+      uses: actions/upload-artifact@v2
+      with:
+        name: ${{ matrix.name }}
+        path: "*${{ matrix.ref }}.abi"
+
+  abi-compare:
+    if: github.repository_owner == 'llvm'
+    runs-on: ubuntu-latest
+    needs:
+      - abi-dump-setup
+      - abi-dump
+    steps:
+      - name: Download baseline
+        uses: actions/download-artifact@v1
+        with:
+          name: build-baseline
+      - name: Download latest
+        uses: actions/download-artifact@v1
+        with:
+          name: build-latest
+
+      - name: Install abi-compliance-checker
+        run: sudo apt-get install abi-compliance-checker
+      - name: Compare ABI
+        run: |
+          for lib in ${{ needs.abi-dump-setup.outputs.ABI_LIBS }}; do
+            abi-compliance-checker -lib $lib -old build-baseline/$lib*.abi -new build-latest/$lib*.abi
+          done
+      - name: Upload ABI Comparison
+        if: always()
+        uses: actions/upload-artifact@v2
+        with:
+          name: compat-report-${{ github.sha }}
+          path: compat_reports/
+
diff --git a/.github/workflows/libclc-tests.yml b/.github/workflows/libclc-tests.yml
new file mode 100644
--- /dev/null
+++ b/.github/workflows/libclc-tests.yml
@@ -0,0 +1,39 @@
+name: libclc Tests
+
+on:
+  workflow_dispatch:
+  push:
+    ignore-forks: true
+    branches:
+      - 'release/**'
+    paths:
+      - 'libclc/**'
+      - '.github/workflows/libclc-tests.yml'
+      - '.github/workflows/llvm-project-tests.yml'
+      - '!clang/**'
+      - '!llvm/**'
+  pull_request:
+    ignore-forks: true
+    branches:
+      - 'release/**'
+    paths:
+      - 'libclc/**'
+      - '.github/workflows/libclc-tests.yml'
+      - '.github/workflows/llvm-project-tests.yml'
+      - '!clang/**'
+      - '!llvm/**'
+
+concurrency:
+  # Skip intermediate builds: always.
+  # Cancel intermediate builds: only if it is a pull request build.
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
+jobs:
+  check_libclc:
+    if: github.repository_owner == 'llvm'
+    name: Test libclc
+    uses: ./.github/workflows/llvm-project-tests.yml
+    with:
+      build_target: ''
+      projects: clang;libclc
diff --git a/.github/workflows/lld-tests.yml b/.github/workflows/lld-tests.yml
new file mode 100644
--- /dev/null
+++ b/.github/workflows/lld-tests.yml
@@ -0,0 +1,37 @@
+name: LLD Tests
+
+on:
+  workflow_dispatch:
+  push:
+    ignore-forks: true
+    branches:
+      - 'release/**'
+    paths:
+      - 'lld/**'
+      - '.github/workflows/lld-tests.yml'
+      - '.github/workflows/llvm-project-tests.yml'
+      - '!llvm/**'
+  pull_request:
+    ignore-forks: true
+    branches:
+      - 'release/**'
+    paths:
+      - 'lld/**'
+      - '.github/workflows/lld-tests.yml'
+      - '.github/workflows/llvm-project-tests.yml'
+      - '!llvm/**'
+
+concurrency:
+  # Skip intermediate builds: always.
+  # Cancel intermediate builds: only if it is a pull request build.
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
+jobs:
+  check_lld:
+    if: github.repository_owner == 'llvm'
+    name: Test lld
+    uses: ./.github/workflows/llvm-project-tests.yml
+    with:
+      build_target: check-lld
+      projects: lld
diff --git a/.github/workflows/lldb-tests.yml b/.github/workflows/lldb-tests.yml
new file mode 100644
--- /dev/null
+++ b/.github/workflows/lldb-tests.yml
@@ -0,0 +1,40 @@
+name: lldb Tests
+
+on:
+  workflow_dispatch:
+  push:
+    ignore-forks: true
+    branches:
+      - 'release/**'
+    paths:
+      - 'lldb/**'
+      - '.github/workflows/lldb-tests.yml'
+      - '.github/workflows/llvm-project-tests.yml'
+      - '!clang/**'
+      - '!llvm/**'
+  pull_request:
+    ignore-forks: true
+    branches:
+      - 'release/**'
+    paths:
+      - 'lldb/**'
+      - '.github/workflows/lldb-tests.yml'
+      - '.github/workflows/llvm-project-tests.yml'
+      - '!clang/**'
+      - '!llvm/**'
+
+concurrency:
+  # Skip intermediate builds: always.
+  # Cancel intermediate builds: only if it is a pull request build.
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
+
+jobs:
+  build_lldb:
+    if: github.repository_owner == 'llvm'
+    name: Build lldb
+    uses: ./.github/workflows/llvm-project-tests.yml
+    with:
+      build_target: ''
+      projects: clang;lldb
diff --git a/.github/workflows/llvm-project-tests.yml b/.github/workflows/llvm-project-tests.yml
new file mode 100644
--- /dev/null
+++ b/.github/workflows/llvm-project-tests.yml
@@ -0,0 +1,73 @@
+name: LLVM Project Tests
+
+on:
+  workflow_dispatch:
+    inputs:
+      build_target:
+        required: false
+      projects:
+        required: false
+  workflow_call:
+    inputs:
+      build_target:
+        required: true
+        type: string
+
+      projects:
+        required: true
+        type: string
+
+concurrency:
+  # Skip intermediate builds: always.
+  # Cancel intermediate builds: only if it is a pull request build.
+  # If the group name here is the same as the group name in the workflow that includes
+  # this one, then the action will try to wait on itself and get stuck.
+  group: llvm-project-${{ github.workflow }}-${{ inputs.projects}}${{ github.ref }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
+jobs:
+  lit-tests:
+    name: Lit Tests
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          # Use windows-2019 due to:
+          # https://developercommunity.visualstudio.com/t/Prev-Issue---with-__assume-isnan-/1597317
+          - windows-2019
+          # We're using a specific version of macOS due to:
+          # https://github.com/actions/virtual-environments/issues/5900
+          # We need addtional testing to see if our workaround works for
+          # new macOS builds.
+          - macOS-10.15
+    steps:
+      - name: Setup Windows
+        if: startsWith(matrix.os, 'windows')
+        uses: llvm/actions/setup-windows@main
+        with:
+          arch: amd64
+      - name: Install Ninja
+        uses: llvm/actions/install-ninja@main
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 250
+      - name: Build and Test
+        uses: llvm/actions/build-test-llvm-project@main
+        env:
+          # Workaround for https://github.com/actions/virtual-environments/issues/5900.
+          # This should be a no-op for non-mac OSes
+          PKG_CONFIG_PATH: /usr/local/Homebrew/Library/Homebrew/os/mac/pkgconfig//11
+        with:
+          cmake_args: '-GNinja -DLLVM_ENABLE_PROJECTS="${{ 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
new file mode 100644
--- /dev/null
+++ b/.github/workflows/llvm-tests.yml
@@ -0,0 +1,195 @@
+name: LLVM Tests
+
+on:
+  workflow_dispatch:
+  push:
+    ignore-forks: true
+    branches:
+      - 'release/**'
+    paths:
+      - 'llvm/**'
+      - '.github/workflows/llvm-tests.yml'
+      - '.github/workflows/llvm-project-tests.yml'
+  pull_request:
+    ignore-forks: true
+    branches:
+      - 'release/**'
+    paths:
+      - 'llvm/**'
+      - '.github/workflows/llvm-tests.yml'
+      - '.github/workflows/llvm-project-tests.yml'
+
+concurrency:
+  # Skip intermediate builds: always.
+  # Cancel intermediate builds: only if it is a pull request build.
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
+
+jobs:
+  check_all:
+    if: github.repository_owner == 'llvm'
+    name: Test llvm,clang,libclc
+    uses: ./.github/workflows/llvm-project-tests.yml
+    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:
+    if: github.repository_owner == 'llvm'
+    name: Build lldb
+    uses: ./.github/workflows/llvm-project-tests.yml
+    with:
+      build_target: ''
+      projects: clang;lldb
+
+  check_lld:
+    if: github.repository_owner == 'llvm'
+    name: Test lld
+    uses: ./.github/workflows/llvm-project-tests.yml
+    with:
+      build_target: check-lld
+      projects: lld
+
+  abi-dump-setup:
+    if: github.repository_owner == 'llvm'
+    runs-on: ubuntu-latest
+    outputs:
+      BASELINE_REF: ${{ steps.vars.outputs.BASELINE_REF }}
+      ABI_HEADERS: ${{ steps.vars.outputs.ABI_HEADERS }}
+      BASELINE_VERSION_MAJOR: ${{ steps.vars.outputs.BASELINE_VERSION_MAJOR }}
+      LLVM_VERSION_MAJOR: ${{ steps.version.outputs.LLVM_VERSION_MAJOR }}
+      LLVM_VERSION_MINOR: ${{ steps.version.outputs.LLVM_VERSION_MINOR }}
+      LLVM_VERSION_PATCH: ${{ steps.version.outputs.LLVM_VERSION_PATCH }}
+    steps:
+      - name: Checkout source
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 250
+
+      - name: Get LLVM version
+        id: version
+        uses: llvm/actions/get-llvm-version@main
+
+      - name: Setup Variables
+        id: vars
+        run: |
+          if [ ${{ steps.version.outputs.LLVM_VERSION_MINOR }} -ne 0 -o ${{ steps.version.outputs.LLVM_VERSION_PATCH }} -eq 0 ]; then
+            echo ::set-output name=BASELINE_VERSION_MAJOR::$(( ${{ steps.version.outputs.LLVM_VERSION_MAJOR }} - 1))
+            echo ::set-output name=ABI_HEADERS::llvm-c
+          else
+            echo ::set-output name=BASELINE_VERSION_MAJOR::${{ steps.version.outputs.LLVM_VERSION_MAJOR }}
+            echo ::set-output name=ABI_HEADERS::.
+          fi
+
+  abi-dump:
+    if: github.repository_owner == 'llvm'
+    needs: abi-dump-setup
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        name:
+          - build-baseline
+          - build-latest
+        include:
+          - name: build-baseline
+            llvm_version_major: ${{ needs.abi-dump-setup.outputs.BASELINE_VERSION_MAJOR }}
+            ref: llvmorg-${{ needs.abi-dump-setup.outputs.BASELINE_VERSION_MAJOR }}.0.0
+            repo: llvm/llvm-project
+          - name: build-latest
+            llvm_version_major: ${{ needs.abi-dump-setup.outputs.LLVM_VERSION_MAJOR }}
+            ref: ${{ github.sha }}
+            repo: ${{ github.repository }}
+    steps:
+    - name: Install Ninja
+      uses: llvm/actions/install-ninja@main
+    - name: Install abi-compliance-checker
+      run: |
+        sudo apt-get install abi-dumper autoconf pkg-config
+    - name: Install universal-ctags
+      run: |
+        git clone https://github.com/universal-ctags/ctags.git
+        cd ctags
+        ./autogen.sh
+        ./configure
+        sudo make install
+    - name: Download source code
+      uses: llvm/actions/get-llvm-project-src@main
+      with:
+        ref: ${{ matrix.ref }}
+        repo: ${{ matrix.repo }}
+    - name: Configure
+      run: |
+        mkdir install
+        cmake -B build -G Ninja -DCMAKE_BUILD_TYPE=Debug -DLLVM_TARGETS_TO_BUILD="" -DLLVM_BUILD_LLVM_DYLIB=ON -DCMAKE_C_FLAGS_DEBUG="-g1 -Og" -DCMAKE_CXX_FLAGS_DEBUG="-g1 -Og" -DCMAKE_INSTALL_PREFIX=`pwd`/install llvm
+    - name: Build
+      # Need to run install-LLVM twice to ensure the symlink is installed (this is a bug).
+      run: |
+        ninja -C build install-LLVM
+        ninja -C build install-LLVM
+        ninja -C build install-llvm-headers
+    - name: Dump ABI
+      run: |
+        if [ "${{ needs.abi-dump-setup.outputs.ABI_HEADERS }}" = "llvm-c" ]; then
+          nm ./install/lib/libLLVM.so | awk "/T _LLVM/ || /T LLVM/ { print $3 }" | sort -u | sed -e "s/^_//g" | cut -d ' ' -f 3 > llvm.symbols
+          # Even though the -symbols-list option doesn't seem to filter out the symbols, I believe it speeds up processing, so I'm leaving it in.
+          export EXTRA_ARGS="-symbols-list llvm.symbols"
+        else
+          touch llvm.symbols
+        fi
+        abi-dumper $EXTRA_ARGS -lver ${{ matrix.ref }} -skip-cxx -public-headers ./install/include/${{ needs.abi-dump-setup.outputs.ABI_HEADERS }} -o ${{ matrix.ref }}.abi ./install/lib/libLLVM.so
+        # Remove symbol versioning from dumps, so we can compare across major versions.
+        sed -i 's/LLVM_${{ matrix.llvm_version_major }}/LLVM_NOVERSION/' ${{ matrix.ref }}.abi
+    - name: Upload ABI file
+      uses: actions/upload-artifact@v1
+      with:
+        name: ${{ matrix.name }}
+        path: ${{ matrix.ref }}.abi
+
+    - name: Upload symbol list file
+      if: matrix.name == 'build-baseline'
+      uses: actions/upload-artifact@v1
+      with:
+        name: symbol-list
+        path: llvm.symbols
+
+  abi-compare:
+    if: github.repository_owner == 'llvm'
+    runs-on: ubuntu-latest
+    needs:
+      - abi-dump-setup
+      - abi-dump
+    steps:
+      - name: Download baseline
+        uses: actions/download-artifact@v1
+        with:
+          name: build-baseline
+      - name: Download latest
+        uses: actions/download-artifact@v1
+        with:
+          name: build-latest
+      - name: Download symbol list
+        uses: actions/download-artifact@v1
+        with:
+          name: symbol-list
+
+      - name: Install abi-compliance-checker
+        run: sudo apt-get install abi-compliance-checker
+      - name: Compare ABI
+        run: |
+          if [ -s symbol-list/llvm.symbols ]; then
+            # This option doesn't seem to work with the ABI dumper, so passing it here.
+            export EXTRA_ARGS="-symbols-list symbol-list/llvm.symbols"
+          fi
+          # FIXME: Reading of gzip'd abi files on the GitHub runners stop
+          # working some time in March of 2021, likely due to a change in the
+          # runner's environment.
+          abi-compliance-checker $EXTRA_ARGS -l libLLVM.so -old build-baseline/*.abi -new build-latest/*.abi || test "${{ needs.abi-dump-setup.outputs.ABI_HEADERS }}" = "llvm-c"
+      - name: Upload ABI Comparison
+        if: always()
+        uses: actions/upload-artifact@v1
+        with:
+          name: compat-report-${{ github.sha }}
+          path: compat_reports/
diff --git a/.github/workflows/version-check.py b/.github/workflows/version-check.py
new file mode 100755
--- /dev/null
+++ b/.github/workflows/version-check.py
@@ -0,0 +1,32 @@
+#!/usr/bin/python3
+
+from git import Repo
+import re
+import sys
+
+version = sys.argv[1]
+
+repo = Repo()
+
+tag = repo.git.describe(tags = True, abbrev=0)
+m = re.match('llvmorg-([0-9]+)\.([0-9]+)\.([0-9]+)', tag)
+if not m:
+    print("error: Tag is not valid: ", tag)
+    sys.exit(1)
+
+expected_major = m.group(1)
+expected_minor = m.group(2)
+expected_patch = int(m.group(3)) + 1
+expected_version = f"{expected_major}.{expected_minor}.{expected_patch}"
+
+m = re.match("[0-9]+\.[0-9]+\.[0-9]+", version)
+if not m:
+    print("error: Version is not valid: ", version)
+    sys.exit(1)
+
+if version != expected_version:
+    print("error: Expected version", expected_version, "but found version", version)
+    sys.exit(1)
+
+print("Versions match:", version, expected_version)
+sys.exit(0)
diff --git a/.github/workflows/version-check.yml b/.github/workflows/version-check.yml
new file mode 100644
--- /dev/null
+++ b/.github/workflows/version-check.yml
@@ -0,0 +1,29 @@
+name: LLVM Project Version Check
+
+on:
+  push:
+    branches:
+      - 'release/**'
+  pull_request:
+    branches:
+      - 'release/**'
+
+
+jobs:
+  version_check:
+    if: github.repository_owner == 'llvm'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Fetch LLVM sources
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Install dependencies
+        run: |
+          pip install -r ./llvm/utils/git/requirements.txt
+
+      - name: Version Check
+        run: |
+          version=`grep -o 'LLVM_VERSION_\(MAJOR\|MINOR\|PATCH\) [0-9]\+' llvm/CMakeLists.txt  | cut -d ' ' -f 2 | tr "\n" "." | sed 's/.$//g'`
+          .github/workflows/version-check.py $version