gcc/testsuite/c-c++-common/Wimplicit-fallthrough-8.c

   1 /* PR c/7652 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-Wimplicit-fallthrough" } */
   4
   5 extern void grace (int);
   6
   7 void
   8 fn1 (int i)
   9 {
  10   switch (i)
  11     case 1:
  12     if (i == 5)
  13       grace (0);
  14     else
  15       goto done;
  16 done:;
  17 }
  18
  19 void
  20 fn2 (int i)
  21 {
  22   switch (i)
  23     {
  24     case 1:
  25       if (i == 5) /* { dg-warning "statement may fall through" } */
  26         grace (0);
  27       else
  28         goto done;
  29     case 2:
  30       --i;
  31     }
  32 done:;
  33 }
  34
  35 void
  36 fn3 (int i)
  37 {
  38   switch (i)
  39     {
  40     case 1:
  41     if (i == 5)
  42       goto done;
  43     else
  44       goto done;
  45     }
  46 done:;
  47 }
  48
  49 void
  50 fn4 (int i)
  51 {
  52   switch (i)
  53     {
  54     case 1:
  55       if (i == 5)
  56         {
  57           grace (1);
  58           goto done;
  59         }
  60       else
  61         goto done;
  62     case 2:;
  63     }
  64 done:;
  65 }
  66
  67 void
  68 fn5 (int i)
  69 {
  70   switch (i)
  71     {
  72     case 1:
  73       if (i == 5)
  74         {
  75           grace (1);
  76           goto done;
  77         }
  78       else
  79         grace (4); /* { dg-warning "statement may fall through" } */
  80     case 2:
  81       grace (9);
  82     }
  83 done:;
  84 }
  85
  86 void
  87 fn6 (int i)
  88 {
  89   switch (i)
  90     {
  91     case 1:
  92       if (i == 5) /* { dg-warning "statement may fall through" } */
  93         {
  94           grace (1);
  95           goto done;
  96         }
  97     case 2:
  98       grace (8);
  99     }
 100 done:;
 101 }