Index: clang/include/clang/Basic/DiagnosticGroups.td
===================================================================
--- clang/include/clang/Basic/DiagnosticGroups.td
+++ clang/include/clang/Basic/DiagnosticGroups.td
@@ -463,7 +463,7 @@
 def MainReturnType : DiagGroup<"main-return-type">;
 def MaxUnsignedZero : DiagGroup<"max-unsigned-zero">;
 def MissingBraces : DiagGroup<"missing-braces">;
-def MissingDeclarations: DiagGroup<"missing-declarations">;
+def UselessDeclarations: DiagGroup<"useless-declarations">;
 def : DiagGroup<"missing-format-attribute">;
 def : DiagGroup<"missing-include-dirs">;
 def MissingNoreturn : DiagGroup<"missing-noreturn">;
Index: clang/include/clang/Basic/DiagnosticSemaKinds.td
===================================================================
--- clang/include/clang/Basic/DiagnosticSemaKinds.td
+++ clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -879,10 +879,10 @@
 
 /// parser diagnostics
 def ext_no_declarators : ExtWarn<"declaration does not declare anything">,
-  InGroup<MissingDeclarations>;
+  InGroup<UselessDeclarations>;
 def err_no_declarators : Error<"declaration does not declare anything">;
 def ext_typedef_without_a_name : ExtWarn<"typedef requires a name">,
-  InGroup<MissingDeclarations>;
+  InGroup<UselessDeclarations>;
 def err_typedef_not_identifier : Error<"typedef name must be an identifier">;
 
 def ext_non_c_like_anon_struct_in_typedef : ExtWarn<
@@ -6761,9 +6761,9 @@
 def err_typecheck_sclass_fscope : Error<
   "illegal storage class on file-scoped variable">;
 def warn_standalone_specifier : Warning<"'%0' ignored on this declaration">,
-  InGroup<MissingDeclarations>;
+  InGroup<UselessDeclarations>;
 def ext_standalone_specifier : ExtWarn<"'%0' is not permitted on a declaration "
-  "of a type">, InGroup<MissingDeclarations>;
+  "of a type">, InGroup<UselessDeclarations>;
 def err_standalone_class_nested_name_specifier : Error<
   "forward declaration of %select{class|struct|interface|union|enum}0 cannot "
   "have a nested name specifier">;
Index: clang/test/Parser/MicrosoftExtensions.c
===================================================================
--- clang/test/Parser/MicrosoftExtensions.c
+++ clang/test/Parser/MicrosoftExtensions.c
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -triple i386-mingw32 -fsyntax-only -Wno-missing-declarations -verify -fms-extensions  %s
+// RUN: %clang_cc1 -triple i386-mingw32 -fsyntax-only -Wno-useless-declarations -verify -fms-extensions  %s
 __stdcall int func0(void);
 int __stdcall func(void);
 typedef int (__cdecl *tptr)(void);