gcc/testsuite/gcc.dg/Wstrict-aliasing-struct-with-char-member.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -Wall" } */
   3
   4 struct a {
   5     int i;
   6     char c;
   7 };
   8 struct b {
   9     float f;
  10     float g;
  11 };
  12 int main(void)
  13 {
  14   static struct b b;
  15   return ((struct a *)&b)->i; /* { dg-warning "will break strict-aliasing" } */
  16 }