gcc/testsuite/gcc.dg/Wswitch-unreachable-1.c

   1 /* PR c/49859 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-Wswitch-unreachable" } */
   4
   5 extern void foo (int);
   6 extern int j;
   7
   8 void
   9 fn0 (int i)
  10 {
  11   switch (i)
  12     {
  13     int t = 10; /* { dg-warning "statement will never be executed" } */
  14     default:
  15       foo (t);
  16     }
  17
  18   switch (i)
  19     { /* { dg-warning "statement will never be executed" } */
  20       int A[i];
  21       default: /* { dg-error "switch jumps into scope" } */
  22         break;
  23     }
  24
  25   switch (i)
  26     default:
  27       j = sizeof (struct { int i; });
  28
  29   switch (i)
  30     {
  31       int A[3];
  32       default:
  33         break;
  34     }
  35 }