add llvm

.github/workflows/ci.yml

@@ -15,6 +15,7 @@ jobs:
 
     strategy:
       matrix:
+        fail-fast: false
         resolver: ["lts-16.31", "lts-18.28", "lts-19.33", "lts-20.11"]
 
     services:
@@ -38,15 +39,27 @@ jobs:
 
     strategy:
       matrix:
-        resolver: ["lts-18.28", "lts-19.33", "lts-20.11"]
+        fail-fast: false
+        resolver:
+          - resolver: lts-18.28
+            use-llvm: 'true'
+          - resolver: lts-19.33
+            use-llvm: 'true'
+          - resolver: lts-20.11
+            use-llvm: 'false'
 
     steps:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0 # If you only need the current version keep this.
 
       - name: Install os dependencies
-        run: brew install pcre
+        run: brew install pcre llvm@13
+
+      - name: Add LLVM to path
+        if: ${{ matrix.use-llvm == 'true' }}
+        run: echo "PATH=/opt/homebrew/opt/llvm@13/bin:$PATH" >> $GITHUB_ENV
+
 
       - uses: ./.github/actions/setup-cache
       - uses: ./.github/actions/ci