--- /dev/null
+/* PR c++/34513 */
+/* { dg-do run } */
+
+#include <omp.h>
+
+extern void abort ();
+
+static int errors = 0;
+static int thrs = 4;
+
+int
+main ()
+{
+ omp_set_dynamic (0);
+
+ #pragma omp parallel num_threads (thrs)
+ {
+ static int shrd = 0;
+
+ #pragma omp atomic
+ shrd += 1;
+
+ #pragma omp barrier
+
+ if (shrd != thrs)
+ #pragma omp atomic
+ errors += 1;
+ }
+
+ if (errors)
+ abort ();
+ return 0;
+}