gcc/testsuite/gcc.dg/builtin-bswap-5.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O" } */
   3 int
   4 main (void)
   5 {
   6   /* Test constant folding.  */
   7   extern void link_error (void);
   8
   9   if (__builtin_bswap16(0xaabb) != 0xbbaa)
  10     link_error ();
  11
  12   if (__builtin_bswap32(0xaabbccdd) != 0xddccbbaa)
  13     link_error ();
  14
  15   if (__builtin_bswap64(0x1122334455667788ULL) != 0x8877665544332211ULL)
  16     link_error ();
  17
  18   return 0;
  19 }