1 files changed, 29 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/gnu2x-empty-init-1.c b/gcc/testsuite/gcc.dg/gnu2x-empty-init-1.c
new file mode 100644
index 0000000..e7dc9df
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/gnu2x-empty-init-1.c
@@ -0,0 +1,29 @@
+/* Test C2X support for empty initializers: valid use cases with GNU
+   extensions.  */
+/* { dg-do run } */
+/* { dg-options "-std=gnu2x" } */
+
+extern void exit (int);
+extern void abort (void);
+
+void
+f (int a)
+{
+  struct s { volatile int x[a]; };
+  struct s b = {};
+  for (int i = 0; i < a; i++)
+    if (b.x[i] != 0)
+      abort ();
+  /* Overwrite contents of b.x before second call to make it more likely stack
+     contents are nonzero if proper initialization did not occur.  */
+  for (int i = 0; i < a; i++)
+    b.x[i] = -1;
+}
+
+int
+main (void)
+{
+  f (100);
+  f (100);
+  exit (0);
+}