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

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