llvm-gcc-4.2/gcc/testsuite/gcc.dg/gomp/appendix-a/a.20.2.c

/* { dg-do compile } */

void
a20 ()
{
  int a = 1;
#pragma omp parallel
  {
    if (a != 0)
      {
#pragma omp flush(a)
      }
    if (a != 0)
      {
#pragma omp barrier
      }
  }
}