gcc/testsuite/gcc.dg/bitint-109.c

   1 /* PR middle-end/116486 */
   2 /* { dg-do run { target bitint } } */
   3 /* { dg-options "-O2 -fno-tree-ccp" } */
   4
   5 unsigned u;
   6
   7 #if __BITINT_MAXWIDTH__ >= 129
   8 #define N 0x100000000000000000000000000000000uwb
   9 #else
  10 #define N 0xffffffffffffffffuwb
  11 #endif
  12
  13 int
  14 foo (void)
  15 {
  16   return __builtin_stdc_first_leading_one (u / N);
  17 }
  18
  19 int
  20 main ()
  21 {
  22   int x = foo ();
  23   if (x)
  24     __builtin_abort ();
  25 }