gcc/testsuite/gcc.c-torture/execute/builtin-constant.c

   1 /* PR optimization/8423.  */
   2
   3 #define btest(x) __builtin_constant_p(x) ? "1" : "0"
   4
   5 #ifdef __OPTIMIZE__
   6 void
   7 foo (char *i)
   8 {
   9   if (*i == '0')
  10     abort ();
  11 }
  12 #else
  13 void
  14 foo (char *i)
  15 {
  16 }
  17 #endif
  18
  19 int
  20 main (void)
  21 {
  22   int size = sizeof (int);
  23   foo (btest (size));
  24   foo (btest (size));
  25   exit (0);
  26 }