1 files changed, 18 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/ext/tmplattr2.C b/gcc/testsuite/g++.dg/ext/tmplattr2.C
new file mode 100644
index 000000000..4fd651d6c
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/tmplattr2.C
@@ -0,0 +1,18 @@
+// PR c++/17743
+
+template <unsigned Len, unsigned Align>
+struct aligned_storage
+{
+  typedef char type[Len] __attribute__((aligned((Align))));
+};
+
+template<typename T>
+struct X
+{
+  typename aligned_storage<sizeof(T),__alignof(T)>::type data;
+};
+
+template<bool> struct StaticAssert;
+template<> struct StaticAssert<true> {};
+
+StaticAssert<__alignof (X<double>) == __alignof (double)> dummy;