gcc/testsuite/gcc.dg/bitint-106.c

   1 /* PR tree-optimization/115337 */
   2 /* { dg-do run { target bitint } } */
   3 /* { dg-options "-O2" } */
   4
   5 #if __BITINT_MAXWIDTH__ >= 129
   6 #define N 128
   7 #else
   8 #define N 63
   9 #endif
  10
  11 _BitInt (N) g;
  12 int c;
  13
  14 void
  15 foo (unsigned _BitInt (N + 1) z, _BitInt (N) *ret)
  16 {
  17   c = __builtin_stdc_first_leading_one (z << N);
  18   _BitInt (N) y = *(_BitInt (N) *) __builtin_memset (&g, c, 5);
  19   *ret = y;
  20 }
  21
  22 int
  23 main ()
  24 {
  25   _BitInt (N) x;
  26   foo (0, &x);
  27   if (c || g || x)
  28     __builtin_abort ();
  29 }