gcc/testsuite/gcc.dg/alias-9.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-Wstrict-aliasing=2 -O2" } */
   3
   4 int a[2];
   5
   6 double *foo1(void)
   7 {
   8   return (double *)a; /* { dg-warning "strict-aliasing" } */
   9 }
  10
  11 double *foo2(void)
  12 {
  13   return (double *)&a[0]; /* { dg-warning "strict-aliasing" } */
  14 }
  15
  16 _Complex x;
  17 int *bar(void)
  18 {
  19   return (int *)&__imag x; /* { dg-warning "strict-aliasing" } */
  20 }