1 files changed, 37 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/transparent-union-5.c b/gcc/testsuite/gcc.dg/transparent-union-5.c
new file mode 100644
index 000000000..47e245e24
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/transparent-union-5.c
@@ -0,0 +1,37 @@
+/* PR 24255 */
+/* { dg-do run } */
+/* { dg-options "-O" } */
+
+extern void abort (void);
+
+union wait { int w_status; };
+
+typedef union
+{
+  union wait *uptr;
+  int *iptr;
+} WAIT_STATUS __attribute__ ((__transparent_union__));
+
+int status;
+union wait wstatus;
+
+void __attribute__((noinline))
+test1 (WAIT_STATUS s)
+{
+  if (s.iptr != &status)
+    abort ();
+}
+
+void __attribute__((noinline))
+test2 (WAIT_STATUS s)
+{
+  if (s.uptr != &wstatus)
+    abort ();
+}
+
+int main()
+{
+  test1 (&status);
+  test2 (&wstatus);
+  return 0;
+}