+/* { dg-do run } */
+
+#include <stdio.h>
+#include <omp.h>
+extern void abort (void);
+int
+main ()
+{
+ int bad, x;
+ x = 2;
+ bad = 0;
+#pragma omp parallel num_threads(2) shared(x, bad)
+ {
+ if (omp_get_thread_num () == 0)
+ {
+ volatile int i;
+ for (i = 0; i < 100000000; i++)
+ x = 5;
+ }
+ else
+ {
+ /* Print 1: the following read of x has a race */
+ if (x != 2 && x != 5)
+ bad = 1;
+ }
+#pragma omp barrier
+ if (omp_get_thread_num () == 0)
+ {
+ /* x must be 5 now. */
+ if (x != 5)
+ bad = 1;
+ }
+ else
+ {
+ /* x must be 5 now. */
+ if (x != 5)
+ bad = 1;
+ }
+ }
+
+ if (bad)
+ abort ();
+
+ return 0;
+}