Produce a diagnostic if alignas is applied to an expression. Neither C11 nor

C++11 allows that.

llvm-svn: 173789

1 files changed, 4 insertions, 2 deletions

diff --git a/clang/test/SemaCXX/alignof-sizeof-reference.cpp b/clang/test/SemaCXX/alignof-sizeof-reference.cpp
index ccdf45e52dd..d76fcf55c2d 100644
--- a/clang/test/SemaCXX/alignof-sizeof-reference.cpp
+++ b/clang/test/SemaCXX/alignof-sizeof-reference.cpp
@@ -4,8 +4,10 @@ struct s0; // expected-note {{forward declaration}}
 char ar[sizeof(s0&)]; // expected-error {{invalid application of 'sizeof' to an incomplete type}}
 void test() {
   char &r = ar[0];
-  static_assert(alignof(r) == 1, "bad alignment");
+  static_assert(alignof(r) == 1, "bad alignment"); // expected-warning {{GNU extension}}
+  static_assert(alignof(char&) == 1, "bad alignment");
   static_assert(sizeof(r) == 1, "bad size");
+  static_assert(sizeof(char&) == 1, "bad size");
 }
 
 void f();  // expected-note{{possible target for call}}
@@ -18,5 +20,5 @@ void g() {
 template<typename T> void f_template(); // expected-note{{possible target for call}}
 template<typename T> void f_template(T*); // expected-note{{possible target for call}}
 void rdar9659191() {
-  (void)alignof(f_template<int>); // expected-error{{reference to overloaded function could not be resolved; did you mean to call it?}}
+  (void)alignof(f_template<int>); // expected-error{{reference to overloaded function could not be resolved; did you mean to call it?}} expected-warning {{GNU extension}}
 }