gcc/testsuite/gcc.dg/builtin-bswap-2.c

   1 /* { dg-do run } */
   2 /* { dg-require-effective-target stdint_types } */
   3 /* { dg-options "" } */
   4 #include <stdint.h>
   5
   6 extern void abort (void);
   7
   8 int main (void)
   9 {
  10   uint32_t a = 4;
  11   uint32_t b;
  12
  13   b = __builtin_bswap32 (a);
  14   a = __builtin_bswap32 (b);
  15
  16   if (b == 4 || a != 4)
  17     abort ();
  18
  19   return 0;
  20 }