Objective-C. Provide group name for warning

on multiple selector names found during lookup.
rdar://19265296


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@224536 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Basic/DiagnosticGroups.td

@@ -274,6 +274,7 @@ def ObjCInvalidIBOutletProperty : DiagGroup<"invalid-iboutlet">;
 def ObjCRootClass : DiagGroup<"objc-root-class">;
 def ObjCPointerIntrospectPerformSelector : DiagGroup<"deprecated-objc-pointer-introspection-performSelector">;
 def ObjCPointerIntrospect : DiagGroup<"deprecated-objc-pointer-introspection", [ObjCPointerIntrospectPerformSelector]>;
+def ObjCMultipleMethodName : DiagGroup<"objc-multiple-method-names">;
 def DeprecatedObjCIsaUsage : DiagGroup<"deprecated-objc-isa-usage">;
 def ExplicitInitializeCall : DiagGroup<"explicit-initialize-call">;
 def Packed : DiagGroup<"packed">;

include/clang/Basic/DiagnosticSemaKinds.td

@@ -721,7 +721,8 @@ def warn_implements_nscopying : Warning<
 "default assign attribute on property %0 which implements "
 "NSCopying protocol is not appropriate with -fobjc-gc[-only]">;
 
-def warn_multiple_method_decl : Warning<"multiple methods named %0 found">;
+def warn_multiple_method_decl : Warning<"multiple methods named %0 found">,
+  InGroup<ObjCMultipleMethodName>;
 def warn_strict_multiple_method_decl : Warning<
   "multiple methods named %0 found">, InGroup<StrictSelector>, DefaultIgnore;
 def warn_accessor_property_type_mismatch : Warning<

test/Misc/warning-flags.c

@@ -18,7 +18,7 @@ This test serves two purposes:
 
 The list of warnings below should NEVER grow.  It should gradually shrink to 0.
 
-CHECK: Warnings without flags (97):
+CHECK: Warnings without flags (96):
 CHECK-NEXT:   ext_excess_initializers
 CHECK-NEXT:   ext_excess_initializers_in_char_array_initializer
 CHECK-NEXT:   ext_expected_semi_decl_list
@@ -89,7 +89,6 @@ CHECK-NEXT:   warn_missing_dependent_template_keyword
 CHECK-NEXT:   warn_missing_exception_specification
 CHECK-NEXT:   warn_missing_whitespace_after_macro_name
 CHECK-NEXT:   warn_mt_message
-CHECK-NEXT:   warn_multiple_method_decl
 CHECK-NEXT:   warn_no_constructor_for_refconst
 CHECK-NEXT:   warn_not_compound_assign
 CHECK-NEXT:   warn_objc_property_copy_missing_on_block

test/SemaObjC/method-lookup-3.m

@@ -71,3 +71,29 @@ struct test4b { float x, y; };
 void test4(id x) {
   (void) [x test4]; //expected-warning {{multiple methods named 'test4' found}}
 }
+
+// rdar://19265296
+#pragma clang diagnostic ignored "-Wobjc-multiple-method-names"
+@interface NSObject 
++ (id)alloc;
++ (id)class;
+- (id) init;
+@end
+
+@class NSString;
+@interface A : NSObject
+- (instancetype)initWithType:(NSString *)whatever;
+@end
+
+@interface Test : NSObject @end
+
+@implementation Test
++ (instancetype)foo
+{
+    return [[[self class] alloc] initWithType:3];
+}
+- (instancetype)initWithType:(int)whatever
+{
+    return [super init];
+}
+@end