Index: cfe/trunk/include/clang/Basic/DiagnosticGroups.td
===================================================================
--- cfe/trunk/include/clang/Basic/DiagnosticGroups.td
+++ cfe/trunk/include/clang/Basic/DiagnosticGroups.td
@@ -454,6 +454,8 @@
 def SwitchBool     : DiagGroup<"switch-bool">;
 def SwitchEnum     : DiagGroup<"switch-enum">;
 def Switch         : DiagGroup<"switch">;
+def EnumCompareSwitch : DiagGroup<"enum-compare-switch">;
+def EnumCompare       : DiagGroup<"enum-compare", [EnumCompareSwitch]>;
 def ImplicitFallthroughPerFunction :
   DiagGroup<"implicit-fallthrough-per-function">;
 def ImplicitFallthrough  : DiagGroup<"implicit-fallthrough",
Index: cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td
===================================================================
--- cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td
+++ cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td
@@ -5918,7 +5918,11 @@
 def warn_comparison_of_mixed_enum_types : Warning<
   "comparison of two values with different enumeration types"
   "%diff{ ($ and $)|}0,1">,
-  InGroup<DiagGroup<"enum-compare">>;
+  InGroup<EnumCompare>;
+def warn_comparison_of_mixed_enum_types_switch : Warning<
+  "comparison of two values with different enumeration types in switch statement"
+  "%diff{ ($ and $)|}0,1">,
+  InGroup<EnumCompareSwitch>;
 def warn_null_in_arithmetic_operation : Warning<
   "use of NULL in arithmetic operation">,
   InGroup<NullArithmetic>;
Index: cfe/trunk/lib/Sema/SemaStmt.cpp
===================================================================
--- cfe/trunk/lib/Sema/SemaStmt.cpp
+++ cfe/trunk/lib/Sema/SemaStmt.cpp
@@ -762,7 +762,7 @@
   if (S.Context.hasSameUnqualifiedType(CondType, CaseType))
     return;
 
-  S.Diag(Case->getExprLoc(), diag::warn_comparison_of_mixed_enum_types)
+  S.Diag(Case->getExprLoc(), diag::warn_comparison_of_mixed_enum_types_switch)
       << CondType << CaseType << Cond->getSourceRange()
       << Case->getSourceRange();
 }
Index: cfe/trunk/test/Sema/switch.c
===================================================================
--- cfe/trunk/test/Sema/switch.c
+++ cfe/trunk/test/Sema/switch.c
@@ -372,7 +372,7 @@
   case EE1_b: break;
   case EE1_c: break; // no-warning
   case EE1_d: break; // expected-warning {{case value not in enumerated type 'enum ExtendedEnum1'}}
-  // expected-warning@-1 {{comparison of two values with different enumeration types ('enum ExtendedEnum1' and 'const enum ExtendedEnum1_unrelated')}}
+  // expected-warning@-1 {{comparison of two values with different enumeration types in switch statement ('enum ExtendedEnum1' and 'const enum ExtendedEnum1_unrelated')}}
   }
 }
 
Index: cfe/trunk/test/SemaCXX/warn-enum-compare.cpp
===================================================================
--- cfe/trunk/test/SemaCXX/warn-enum-compare.cpp
+++ cfe/trunk/test/SemaCXX/warn-enum-compare.cpp
@@ -212,19 +212,19 @@
   switch (a) {
     case name1::F1: break;
     case name1::F3: break;
-    case name2::B2: break; // expected-warning {{comparison of two values with different enumeration types ('name1::Foo' and 'name2::Baz')}}
+    case name2::B2: break; // expected-warning {{comparison of two values with different enumeration types in switch statement ('name1::Foo' and 'name2::Baz')}}
   }
 
   switch (x) {
     case FooB: break;
     case FooC: break;
-    case BarD: break; // expected-warning {{comparison of two values with different enumeration types ('Foo' and 'Bar')}}
+    case BarD: break; // expected-warning {{comparison of two values with different enumeration types in switch statement ('Foo' and 'Bar')}}
   }
 
   switch(getBar()) {
     case BarE: break;
     case BarF: break;
-    case FooA: break; // expected-warning {{comparison of two values with different enumeration types ('Bar' and 'Foo')}}
+    case FooA: break; // expected-warning {{comparison of two values with different enumeration types in switch statement ('Bar' and 'Foo')}}
   }
 
   switch(x) {