gcc/testsuite/gcc.dg/torture/pr55633.c

   1 /* PR fortran/55633 */
   2 /* { dg-do run { target int128 } } */
   3
   4 extern void abort (void);
   5
   6 __attribute__((noinline, noclone)) void
   7 bar (__int128_t *x)
   8 {
   9   int c = sizeof (__int128_t) * __CHAR_BIT__;
  10   if (c > 127)
  11     c = 127;
  12   if (*x != c)
  13     abort ();
  14 }
  15
  16 __attribute__((noinline)) void
  17 foo (void)
  18 {
  19   __int128_t m, ma;
  20   ma = 0;
  21   m = 0;
  22   m = ~m;
  23   do
  24     {
  25       if (m == 0 || ma > 126)
  26         break;
  27       ma = ma + 1;
  28       m = ((__uint128_t) m) >> 1;
  29     }
  30   while (1);
  31   bar (&ma);
  32 }
  33
  34 int
  35 main ()
  36 {
  37   foo ();
  38   return 0;
  39 }