用于进行gcc测试

				/* { dg-do compile } */								extern int foo(void);				extern void bar(void);								int main ()				{				  /* Malformed uses of 'if' and 'num_threads'.  */				  #pragma omp parallel if (foo () > 10) if (foo () == 3) /* { dg-error "too many" } */				    {				      bar ();				    }								  #pragma omp parallel num_threads (3) num_threads (20)	/* { dg-error "too many" } */				    {				      bar ();				    }								  /* Valid uses of 'if' and 'num_threads'.  */				  #pragma omp parallel if (foo () == 10) num_threads (foo ())				    {				      bar ();				    }				}