gcc/testsuite/gcc.target/i386/pr55147.c

   1 /* PR target/55147 */
   2 /* { dg-do run } */
   3 /* { dg-options "-O1" } */
   4 /* { dg-additional-options "-march=i486" { target ia32 } } */
   5
   6 extern void abort (void);
   7
   8 __attribute__((noclone, noinline)) unsigned int
   9 foo (unsigned long long *p, int i)
  10 {
  11   return __builtin_bswap64 (p[i]);
  12 }
  13
  14 int
  15 main ()
  16 {
  17   unsigned long long p[64];
  18   int i;
  19   for (i = 0; i < 64; i++)
  20     p[i] = 0x123456789abcdef0ULL ^ (1ULL << i) ^ (1ULL << (63 - i));
  21   for (i = 0; i < 64; i++)
  22     if (foo (p, i) != __builtin_bswap32 (p[i] >> 32))
  23       abort ();
  24   return 0;
  25 }