Add support for the C11 _Alignof keyword.
This behaves like the existing GNU __alignof and C++11 alignof keywords;
most of the patch is simply adding the third token spelling to various places.
llvm-svn: 159494
diff --git a/clang/lib/Parse/ParseTentative.cpp b/clang/lib/Parse/ParseTentative.cpp
index 8a5e7266..41d793f 100644
--- a/clang/lib/Parse/ParseTentative.cpp
+++ b/clang/lib/Parse/ParseTentative.cpp
@@ -735,6 +735,7 @@
case tok::kw_alignof:
case tok::kw_noexcept:
case tok::kw_nullptr:
+ case tok::kw__Alignof:
case tok::kw___null:
case tok::kw___alignof:
case tok::kw___builtin_choose_expr: