CI: Add llvm dependence (#35)

With the recent inkwell dependence for the LLVM dialect, we need CI to install LLVM.

.github/workflows/ci.yml

@@ -11,45 +11,30 @@ env:
 
 jobs:
   build:
-    name: Build
+    name: Build and Test
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
     - uses: dtolnay/rust-toolchain@stable
-    - run: RUSTFLAGS="-D warnings" cargo build --workspace --verbose
 
-  tests:
-    name: Run tests
-    runs-on: ubuntu-latest
-    needs: build
-    steps:
-    - uses: actions/checkout@v3
-    - uses: dtolnay/rust-toolchain@stable
-    - run: cargo test --workspace --verbose
+    - name: Setup LLVM
+      run: |
+        wget https://apt.llvm.org/llvm.sh
+        chmod +x llvm.sh
+        sudo ./llvm.sh 17
+        sudo apt-get install libpolly-17-dev
 
-  clippy:
-    name: Clippy
-    runs-on: ubuntu-latest
-    needs: build
-    steps:
-    - uses: actions/checkout@v3
-    - uses: dtolnay/rust-toolchain@stable
-    - run: cargo clippy --workspace -- -D warnings
+    - name: Build
+      run: RUSTFLAGS="-D warnings" cargo build --workspace --verbose
 
-  format:
-    name: Code format
-    runs-on: ubuntu-latest
-    needs: build
-    steps:
-    - uses: actions/checkout@v3
-    - uses: dtolnay/rust-toolchain@stable
-    - run: cargo fmt --check
+    - name: Tests
+      run: cargo test --workspace --verbose
 
-  docs:
-    name: Documentation
-    runs-on: ubuntu-latest
-    needs: build
-    steps:
-    - uses: actions/checkout@v3
-    - uses: dtolnay/rust-toolchain@stable
-    - run: RUSTDOCFLAGS="-D warnings" cargo doc --workspace
+    - name: Clippy
+      run: cargo clippy --workspace -- -D warnings
+
+    - name: Format
+      run: cargo fmt --check
+
+    - name: Documentation
+      run: RUSTDOCFLAGS="-D warnings" cargo doc --workspace