gcc/testsuite/gcc.dg/pr99578-2.c

   1 /* PR middle-end/99578 */
   2 /* { dg-do compile { target int32 } } */
   3 /* { dg-options "-O2 -Wstringop-overflow" } */
   4
   5 struct S { int a, b[4]; };
   6 struct T { int a, b[8192], c[4]; };
   7
   8 void
   9 foo (struct S *p)
  10 {
  11   if (p) return;
  12   __builtin_memset (p->b, 0, sizeof p->b);      /* { dg-warning "writing 16 bytes into a region of size 0 overflows the destination" } */
  13 }
  14
  15 void
  16 bar (struct T *p)
  17 {
  18   if (p) return;
  19   __builtin_memset (p->c, 0, sizeof p->c);      /* { dg-warning "writing 16 bytes into a region of size 0 overflows the destination" "" { xfail *-*-* } } */
  20 }
  21
  22 void
  23 baz (void)
  24 {
  25   __builtin_memset ((void *) 0x8004, 0, 16);    /* { dg-bogus "overflows the destination" } */
  26 }