[ci] sanitize build under -fno-fast-math and -ffast-math

Author: serge-sans-paille

.github/workflows/sanitizer.yml

@@ -9,12 +9,15 @@ defaults:
 jobs:
   build:
     runs-on: ubuntu-latest
-    name: 'sanitizer - ${{ matrix.sanitizer }}'
+    name: 'sanitizer - ${{ matrix.sanitizer }} ${{ matrix.fastmath }}'
     strategy:
       matrix:
         sanitizer:
           - address
           - undefined
+        fastmath:
+          - "no-fast-math"
+          - "fast-math"
     steps:
     - name: Checkout xsimd
       uses: actions/checkout@v3
@@ -28,7 +31,7 @@ jobs:
                   -DDOWNLOAD_DOCTEST=ON \
                   -DCMAKE_BUILD_TYPE=Release \
                   -DCMAKE_CXX_COMPILER=clang++ \
-                  -DCMAKE_CXX_FLAGS='-fsanitize=${{ matrix.sanitizer }}' \
+                  -DCMAKE_CXX_FLAGS='-fsanitize=${{ matrix.sanitizer }} -f${{ matrix.fastmath }}' \
                   -G Ninja
     - name: Build
       run: ninja -C _build