diff --git a/.github/workflows/check-all.yml b/.github/workflows/check-all.yml
new file mode 100644
index 00000000..ad68010c
--- /dev/null
+++ b/.github/workflows/check-all.yml
@@ -0,0 +1,42 @@
+name: Raptor CI
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  merge_group:
+
+jobs:
+  build-linux:
+    name: Raptor CI LLVM ${{ matrix.llvm }} ${{ matrix.build }} ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        llvm: ["20"]
+        build: ["Release"] #, "Debug"] #, "RelWithDebInfo"]
+        os: [ubuntu-22.04]
+
+    timeout-minutes: 30
+
+    steps:
+    - name: add llvm
+      run: |
+          wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key|sudo apt-key add -
+          sudo apt-add-repository "deb http://apt.llvm.org/`lsb_release -c | cut -f2`/ llvm-toolchain-`lsb_release -c | cut -f2`-${{ matrix.llvm }} main" || true
+          sudo apt-get install -y cmake gcc g++ llvm-${{ matrix.llvm }}-dev libclang-${{ matrix.llvm }}-dev clang-${{ matrix.llvm }} lld-${{ matrix.llvm }} mlir-${{ matrix.llvm }}-tools libmlir-${{ matrix.llvm }} libmlir-${{ matrix.llvm }}-dev libflang-${{ matrix.llvm }}-dev flang-${{ matrix.llvm }} libzstd-dev libmpfr-dev
+          sudo python3 -m pip install --upgrade pip lit
+    - uses: actions/checkout@v4
+    - name: mkdir
+      run: rm -rf build && mkdir build
+    - name: cmake
+      working-directory: build
+      run: cmake ../ -DCMAKE_BUILD_TYPE=${{ matrix.build }} -DLLVM_EXTERNAL_LIT=`which lit` -DLLVM_DIR=/usr/lib/llvm-${{ matrix.llvm }}/lib/cmake/llvm
+    - name: make
+      working-directory: build
+      run: make -j `nproc`
+    - name: make check
+      working-directory: build
+      run: make -j `nproc` check-all