+
−/* { dg-do compile } */
+
−/* { dg-options "-O2 -Wall" } */
+
−
+
−struct a {
+
−    int i;
+
−    char c;
+
−};
+
−struct b {
+
−    float f;
+
−    float g;
+
−};
+
−int main(void)
+
−{
+
−  static struct b b;
+
−  return ((struct a *)&b)->i; /* { dg-warning "will break strict-aliasing" } */
+
−}