Fix PR3386 by handling GCC's rules for alignof, which are substantially
different than those for sizeof.  Reject alignof(bitfield) like gcc does.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@62928 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/Sema.h b/lib/Sema/Sema.h
index 40cfe8f..a993ebe 100644
--- a/lib/Sema/Sema.h
+++ b/lib/Sema/Sema.h
@@ -1003,6 +1003,7 @@
     ActOnSizeOfAlignOfExpr(SourceLocation OpLoc, bool isSizeof, bool isType,
                            void *TyOrEx, const SourceRange &ArgRange);
 
+  bool CheckAlignOfExpr(Expr *E, SourceLocation OpLoc, const SourceRange &R);
   bool CheckSizeOfAlignOfOperand(QualType type, SourceLocation OpLoc,
                                  const SourceRange &R, bool isSizeof);