gcc/testsuite/gcc.dg/pr25682.c

   1 /* PR c/25682 */
   2 /* { dg-do compile } */
   3 /* Test whether we don't ICE on questionable constructs where offsetof
   4    should have been used instead.  */
   5
   6 struct S
   7 {
   8   char a[4];
   9   int b;
  10 };
  11
  12 char c[(char *) &((struct S *) 0)->b - (char *) 0];
  13 char d[(__SIZE_TYPE__) &((struct S *) 8)->b];
  14 char e[sizeof (c) == __builtin_offsetof (struct S, b) ? 1 : -1];
  15 char f[sizeof (d) == __builtin_offsetof (struct S, b) + 8 ? 1 : -1];
  16
  17 extern void bar (char *, char *);
  18
  19 void
  20 foo (void)
  21 {
  22   char g[(char *) &((struct S *) 0)->b - (char *) 0];
  23   char h[(__SIZE_TYPE__) &((struct S *) 8)->b];
  24   char i[sizeof (g) == __builtin_offsetof (struct S, b) ? 1 : -1];
  25   char j[sizeof (h) == __builtin_offsetof (struct S, b) + 8 ? 1 : -1];
  26   bar (g, h);
  27 }