gcc/testsuite/gcc.target/i386/builtin-bswap-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2" } */
   3 /* { dg-final { scan-assembler-not "builtin_bswap" } } */
   4
   5 long foo (long a)
   6 {
   7   long b;
   8
   9 #if __LP64__
  10   b = __builtin_bswap64 (a);
  11 #else
  12   b = __builtin_bswap32 (a);
  13 #endif
  14
  15   return b;
  16 }