--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/c-c++-common/gomp/flush-2.c	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,17 @@
+int a, b;
+
+void
+foo (void)
+{
+  #pragma omp flush
+  #pragma omp flush (a, b)
+  #pragma omp flush acquire
+  #pragma omp flush release
+  #pragma omp flush acq_rel
+  #pragma omp flush relaxed		/* { dg-error "expected 'acq_rel', 'release' or 'acquire'" } */
+  #pragma omp flush seq_cst		/* { dg-error "expected 'acq_rel', 'release' or 'acquire'" } */
+  #pragma omp flush foobar		/* { dg-error "expected 'acq_rel', 'release' or 'acquire'" } */
+  #pragma omp flush acquire (a, b)	/* { dg-error "'flush' list specified together with memory order clause" } */
+  #pragma omp flush release (a, b)	/* { dg-error "'flush' list specified together with memory order clause" } */
+  #pragma omp flush acq_rel (a, b)	/* { dg-error "'flush' list specified together with memory order clause" } */
+}