gcc/testsuite/c-c++-common/memset-array.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-Wmemset-elt-size" } */
   3 enum a {
   4   a_1,
   5   a_2,
   6   a_n
   7 };
   8 int t1[20];
   9 int t2[a_n];
  10
  11 struct s
  12 {
  13   int t[20];
  14 };
  15
  16 void foo (struct s *s)
  17 {
  18   __builtin_memset (t1, 0, 20); /* { dg-warning "element size" } */
  19   __builtin_memset (t2, 0, a_n); /* { dg-warning "element size" } */
  20   __builtin_memset (s->t, 0, 20); /* { dg-warning "element size" } */
  21 }
  22
  23 char u1[20];
  24 char u2[a_n];
  25
  26 struct s2
  27 {
  28   char u[20];
  29 };
  30
  31 void bar (struct s2 *s)
  32 {
  33   __builtin_memset (u1, 0, 20);
  34   __builtin_memset (u2, 0, a_n);
  35   __builtin_memset (s->u, 0, 20);
  36 }