1 files changed, 17 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/ext/attrib21.C b/gcc/testsuite/g++.dg/ext/attrib21.C
new file mode 100644
index 00000000000..2fc5800b05e
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/attrib21.C
@@ -0,0 +1,17 @@
+// PR c++/20763
+
+typedef void *voidp;
+
+struct S
+{
+  char a;
+  voidp __attribute__ ((aligned (16))) b;
+};
+
+struct T
+{
+  char a;
+  void *__attribute__ ((aligned (16))) b;
+};
+
+int f[sizeof (struct S) != sizeof (struct T) ? -1 : 1];