gcc/testsuite/c-c++-common/Wimplicit-fallthrough-20.c

   1 /* PR c/7652 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-Wimplicit-fallthrough" } */
   4
   5 int
   6 f (int i)
   7 {
   8   switch (i)
   9     {
  10     case -1:
  11       __attribute__((fallthrough));
  12     default:
  13       __attribute__((fallthrough));
  14     case 1:
  15       return 6;
  16     case 2 ... 4:
  17       __attribute__((fallthrough));
  18     case 5:
  19       return 7;
  20     }
  21   return 0;
  22 }
  23
  24 int
  25 g (int i)
  26 {
  27   switch (i)
  28     {
  29     case -1:
  30       __attribute__((used)); /* { dg-warning "empty declaration|ignored" } */
  31     default:
  32       __attribute__((used)); /* { dg-warning "empty declaration|ignored" } */
  33     case 1:
  34       return 6;
  35     case 2 ... 4:
  36       __attribute__((used)); /* { dg-warning "empty declaration|ignored" } */
  37     case 5:
  38       return 7;
  39     }
  40   return 0;
  41 }