1 files changed, 22 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/torture/pr27184.c b/gcc/testsuite/gcc.dg/torture/pr27184.c
new file mode 100644
index 000000000..cfb6ed2a8
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pr27184.c
@@ -0,0 +1,22 @@
+/* Copyright 2006 Free Software Foundation */
+
+/* Make sure a and a1 alias each other.
+   Incomplete array types used to not be unified, which broke aliasing.  */
+
+/* { dg-do run } */
+
+typedef long atype[];
+typedef long atype1[];
+int NumSift (atype *a, atype1 *a1)
+{
+  (*a)[0] = 0;
+  (*a1)[0] = 1;
+  return (*a)[0];
+}
+int main(void)
+{
+  long a[2];
+  if (!NumSift(&a, &a))
+    __builtin_abort ();
+  return 0;
+}