Make sure vectorization is tested on CI

Author: dktapps

.github/workflows/ci.yml

@@ -22,8 +22,8 @@ jobs:
         zts: [enable, disable]
 
     env:
-      CFLAGS: "-march=x86-64"
-      CXXFLAGS: "-march=x86-64"
+      CFLAGS: "-march=x86-64 -ftree-vectorize -fopt-info-vec"
+      CXXFLAGS: "-march=x86-64 -ftree-vectorize -fopt-info-vec"
     steps:
       - uses: actions/checkout@v4