gcc/testsuite/c-c++-common/Wimplicit-fallthrough-36.c

   1 /* PR c/79153 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-Wimplicit-fallthrough" } */
   4
   5 int
   6 test (int v1, int v2)
   7 {
   8   switch (v1)
   9     {
  10     case 3:
  11       switch (v2)       /* { dg-warning "this statement may fall through" } */
  12         {
  13         case 1:
  14           return 28;
  15         case 2:
  16           return 38;
  17         case 3:
  18           return 88;
  19         default:
  20           break;
  21         }
  22     case 4:             /* { dg-message "here" } */
  23       return 168;
  24     case 5:
  25       switch (v2)       /* { dg-warning "this statement may fall through" } */
  26         {
  27         case 4:
  28           break;
  29         case 5:
  30           return 38;
  31         case 6:
  32           return 88;
  33         }
  34     case 6:             /* { dg-message "here" } */
  35       return 169;
  36     case 7:
  37       switch (v2)       /* { dg-warning "this statement may fall through" } */
  38         {
  39         case 7:
  40           return 38;
  41         case 8:
  42           return 88;
  43         }
  44     case 8:             /* { dg-message "here" } */
  45       return 170;
  46     case 9:
  47       switch (v2)       /* { dg-bogus "this statement may fall through" } */
  48         {
  49         case 9:
  50           return 38;
  51         case 10:
  52           return 88;
  53         default:
  54           return 89;
  55         }
  56     case 10:
  57       return 171;
  58     case 11:
  59       switch (v2)       /* { dg-bogus "this statement may fall through" } */
  60         {
  61         case -__INT_MAX__ - 1 ... 31:
  62           return 38;
  63         case 32:
  64           return 88;
  65         case 33 ... __INT_MAX__:
  66           return 89;
  67         }
  68     case 12:
  69       return 172;
  70     }
  71   return -1;
  72 }