Mark aligned allocation as done.

llvm-svn: 283724
diff --git a/clang/lib/Frontend/InitPreprocessor.cpp b/clang/lib/Frontend/InitPreprocessor.cpp
index 1c3374f..5da547e 100644
--- a/clang/lib/Frontend/InitPreprocessor.cpp
+++ b/clang/lib/Frontend/InitPreprocessor.cpp
@@ -510,7 +510,6 @@
   if (LangOpts.CPlusPlus1z) {
     Builder.defineMacro("__cpp_hex_float", "201603");
     Builder.defineMacro("__cpp_inline_variables", "201606");
-    //Builder.defineMacro("__cpp_aligned_new", "201606");
     //Builder.defineMacro("__cpp_noexcept_function_type", "201510");
     Builder.defineMacro("__cpp_capture_star_this", "201603");
     Builder.defineMacro("__cpp_if_constexpr", "201606");
@@ -522,6 +521,8 @@
     Builder.defineMacro("__cpp_nontype_template_args", "201411");
     Builder.defineMacro("__cpp_fold_expressions", "201603");
   }
+  if (LangOpts.AlignedAllocation)
+    Builder.defineMacro("__cpp_aligned_new", "201606");
 
   // TS features.
   if (LangOpts.ConceptsTS)