gcc-4.9/gcc/testsuite/gcc.dg/builtin-constant_p-1.c


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/* { dg-do compile } */

int main()
{
  if (__builtin_constant_p ()) /* { dg-error "not enough" } */
    return 0;
  if (__builtin_constant_p (5, 6)) /* { dg-error "too many" } */
    return 1;
  return 0;
}