1 files changed, 38 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/atomic/stdatomic-flag.c b/gcc/testsuite/gcc.dg/atomic/stdatomic-flag.c
new file mode 100644
index 00000000000..32f9e9bb631
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/atomic/stdatomic-flag.c
@@ -0,0 +1,38 @@
+/* Test atomic_flag routines for existence and execution.  */
+/* { dg-do run } */
+/* { dg-options "-std=c11 -pedantic-errors" } */
+
+#include <stdatomic.h>
+
+extern void abort (void);
+atomic_flag a = ATOMIC_FLAG_INIT;
+
+int
+main ()
+{
+  int b;
+
+  if (!atomic_is_lock_free (&a))
+    abort ();
+
+  if (atomic_flag_test_and_set (&a))
+    abort ();
+  atomic_flag_clear_explicit (&a, memory_order_relaxed);
+  if (atomic_flag_test_and_set (&a))
+    abort ();
+  atomic_flag_clear (&a);
+
+  b = atomic_flag_test_and_set_explicit (&a, memory_order_seq_cst);
+  if (!atomic_flag_test_and_set (&a) || b != 0)
+    abort ();
+
+  b = atomic_flag_test_and_set_explicit (&a, memory_order_acq_rel);
+  if (!atomic_flag_test_and_set (&a) || b != 1)
+    abort ();
+
+  atomic_flag_clear_explicit (&a, memory_order_seq_cst);
+  if (atomic_flag_test_and_set (&a))
+    abort ();
+
+  return 0;
+}