PR c++/38611 - missing -Wattributes on a typedef with attribute aligned

From-SVN: r236112

gcc/testsuite/ChangeLog

+2016-05-10  Martin Sebor  <msebor@redhat.com>
+
+	PR c++/38611
+	* g++.dg/Wattributes.C: New test.
+
 2016-05-10  Marc Glisse  <marc.glisse@inria.fr>
 
 	* gcc.dg/tree-ssa/bit-assoc.c: New testcase.

gcc/testsuite/g++.dg/Wattributes.C

+// PR c++/38611
+// { dg-do compile }
+
+struct A { unsigned char a [272]; };
+
+typedef struct __attribute__ ((aligned (128))) A B;   // { dg-warning "attributes ignored" }
+typedef struct __attribute__ ((__may_alias__)) A C;   // { dg-warning "attributes ignored" }
+
+#ifndef __cplusplus
+#  define alignof       _Alignof
+#  define static_assert _Static_assert
+#elif __cplusplus < 201103L
+#  define alignof __alignof__
+#  define static_assert(expr, ignore) typedef int Assert [(expr) ? 1 : -1]
+#endif
+
+#define SA(expr) static_assert ((expr), #expr)
+
+SA (alignof (struct A) == alignof (B));
+