gcc/testsuite/gcc.dg/pr100680.c

   1 /* PR middle-end/100680 */
   2 /* { dg-do compile { target size32plus } } */
   3 /* { dg-options "-O2 -Wstringop-overread" } */
   4
   5 struct s {
   6   char a[8];
   7   int i;
   8   long l;
   9 };
  10
  11 extern char ea[8];
  12 static char sa[8] = { 1, 2, 3, 4 };
  13
  14 int
  15 test (void)
  16 {
  17   const struct s *ps = (const struct s *) 0x12345678L;
  18   if (__builtin_memcmp (ps->a, ps->a, 8))
  19     return 0;
  20
  21   if (__builtin_memcmp (ps->a, ea, 8))          /* { dg-bogus "exceeds source size 0" } */
  22     return 0;
  23
  24   if (__builtin_memcmp (ps->a, sa, 8))          /* { dg-bogus "exceeds source size 0" } */
  25     return 0;
  26
  27   if (__builtin_memcmp (ps->a, "abcdABCD", 8))  /* { dg-bogus "exceeds source size 0" } */
  28     return 0;
  29
  30   return 1;
  31 }