ci: hello world testing with different version declarations in go.mod and go versions

.github/workflows/llgo.yml

@@ -92,3 +92,54 @@ jobs:
         run: |
           echo "Test lldb with llgo plugin on ${{matrix.os}} with LLVM ${{matrix.llvm}}"
           bash _lldb/runtest.sh -v
+
+  helloworld-test:
+    strategy:
+      matrix:
+        os: [ubuntu-24.04, macos-latest]
+        llvm: [18]
+        go: ['1.20', '1.21', '1.22', '1.23']
+    runs-on: ${{matrix.os}}
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install dependencies
+        uses: ./.github/actions/setup-deps
+        with:
+          llvm-version: ${{matrix.llvm}}
+
+      - name: Set up Go 1.23 for building llgo
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.23'
+
+      - name: Install llgo
+        working-directory: compiler
+        run: |
+          go install ./...
+          echo "LLGO_ROOT=$GITHUB_WORKSPACE" >> $GITHUB_ENV
+
+      - name: Set up Go for testing
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{matrix.go}}
+
+      - name: Test Hello World with go.mod 1.20
+        if: matrix.go == '1.20' || matrix.go == '1.21' || matrix.go == '1.22' || matrix.go == '1.23'
+        uses: ./.github/actions/test-helloworld
+        with:
+          go-version: ${{matrix.go}}
+          mod-version: '1.20'
+
+      - name: Test Hello World with go.mod 1.21
+        if: matrix.go == '1.21' || matrix.go == '1.22' || matrix.go == '1.23'
+        uses: ./.github/actions/test-helloworld
+        with:
+          go-version: ${{matrix.go}}
+          mod-version: '1.21'
+
+      - name: Test Hello World with go.mod 1.22
+        if: matrix.go == '1.22' || matrix.go == '1.23'
+        uses: ./.github/actions/test-helloworld
+        with:
+          go-version: ${{matrix.go}}
+          mod-version: '1.22'