gcc/testsuite/gcc.dg/torture/pr106513.c

   1 /* { dg-do run } */
   2
   3 typedef __INT64_TYPE__ int64_t;
   4
   5 __attribute__((noinline)) int64_t
   6 swap64 (int64_t n)
   7 {
   8   return (((n & (((int64_t) 0xff) )) << 56) |
   9           ((n & (((int64_t) 0xff) << 8)) << 40) |
  10           ((n & (((int64_t) 0xff) << 16)) << 24) |
  11           ((n & (((int64_t) 0xff) << 24)) << 8) |
  12           ((n & (((int64_t) 0xff) << 32)) >> 8) |
  13           ((n & (((int64_t) 0xff) << 40)) >> 24) |
  14           ((n & (((int64_t) 0xff) << 48)) >> 40) |
  15           ((n & ((int64_t)(0xffull << 56))) >> 56));
  16 }
  17
  18 int main (void)
  19 {
  20   volatile int64_t n = 0x8000000000000000ll;
  21
  22   if (swap64(n) != 0xffffffffffffff80ll)
  23     __builtin_abort ();
  24
  25   return 0;
  26 }