Anonymous union members within a struct are now properly handled as an unevaluated field in C++11 mode. This fixes PR12866.

llvm-svn: 157784

2 files changed, 14 insertions, 1 deletions

diff --git a/clang/lib/Sema/SemaExprMember.cpp b/clang/lib/Sema/SemaExprMember.cpp
index 6af4040784f..f8bf908dfc7 100644
--- a/clang/lib/Sema/SemaExprMember.cpp
+++ b/clang/lib/Sema/SemaExprMember.cpp
@@ -115,7 +115,7 @@ static IMAKind ClassifyImplicitMemberAccess(Sema &SemaRef,
     NamedDecl *D = *I;
 
     if (D->isCXXInstanceMember()) {
-      if (dyn_cast<FieldDecl>(D))
+      if (dyn_cast<FieldDecl>(D) || dyn_cast<IndirectFieldDecl>(D))
         isField = true;
 
       CXXRecordDecl *R = cast<CXXRecordDecl>(D->getDeclContext());
diff --git a/clang/test/SemaCXX/anonymous-union-cxx11.cpp b/clang/test/SemaCXX/anonymous-union-cxx11.cpp
new file mode 100644
index 00000000000..8e682ebcda3
--- /dev/null
+++ b/clang/test/SemaCXX/anonymous-union-cxx11.cpp
@@ -0,0 +1,13 @@
+// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify -pedantic %s
+
+namespace PR12866 {
+  struct bar {
+    union {
+      int member;
+    };
+  };
+
+  void foo( void ) {
+    (void)sizeof(bar::member);
+  }
+}