Make sure we parse a syntax tree when macros are enabled

Author: DougGregor

lib/Parse/ParseDecl.cpp

@@ -199,7 +199,8 @@ extern "C" void swift_ASTGen_buildTopLevelASTNodes(void *sourceFile,
 /// \endverbatim
 void Parser::parseTopLevel(SmallVectorImpl<Decl *> &decls) {
 #ifdef SWIFT_SWIFT_PARSER
-  if ((Context.LangOpts.hasFeature(Feature::BuiltinMacros) ||
+  if ((Context.LangOpts.hasFeature(Feature::Macros) ||
+       Context.LangOpts.hasFeature(Feature::BuiltinMacros) ||
        Context.LangOpts.hasFeature(Feature::ParserASTGen)) &&
       !SourceMgr.hasCodeCompletionBuffer() &&
       SF.Kind != SourceFileKind::SIL) {