gcc/testsuite/gcc.dg/c23-unreachable-1.c

   1 /* Test unreachable in <stddef.h> for C23.  */
   2 /* { dg-do run } */
   3 /* { dg-options "-std=c23 -pedantic-errors -O2" } */
   4
   5 #include <stddef.h>
   6
   7 #ifndef unreachable
   8 #error "unreachable not defined"
   9 #endif
  10
  11 extern void *p;
  12 extern __typeof__ (unreachable ()) *p;
  13
  14 volatile int x = 1;
  15
  16 extern void not_defined (void);
  17
  18 extern void exit (int);
  19
  20 int
  21 main ()
  22 {
  23   if (x == 2)
  24     {
  25       unreachable ();
  26       not_defined ();
  27     }
  28   exit (0);
  29 }