Objective-C IRGen. Fixes an assertion crash caused by inconsistent

linkage related to generation of OBJC_SELECTOR_REFERENCES symbol 
needed in generation of call to 'super' in a class method.
// rdar://18150301

llvm-svn: 216676

clang/lib/CodeGen/CGObjCMac.cpp

@@ -6794,8 +6794,7 @@ CGObjCNonFragileABIMac::GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF,
   // If this is a class message the metaclass is passed as the target.
   llvm::Value *Target;
   if (IsClassMessage)
-      Target = EmitMetaClassRef(CGF, Class,
+      Target = EmitMetaClassRef(CGF, Class, Class->isWeakImported());
-                                (isCategoryImpl && Class->isWeakImported()));
   else
     Target = EmitSuperClassRef(CGF, Class);
 

clang/test/CodeGenObjC/private-extern-selector-reference.m

@@ -0,0 +1,18 @@
+// RUN: %clang_cc1 -triple x86_64-apple-ios6.0.0 -emit-llvm -o - %s | FileCheck %s
+// rdar://18150301
+
+@interface Query
++ (void)_configureCI;
+@end
+
+__attribute__((visibility("default"))) __attribute__((availability(ios,introduced=7.0)))
+@interface ObserverQuery : Query @end
+
+@implementation ObserverQuery
++ (void)_configureCI {
+    [super _configureCI];
+}
+@end
+
+// CHECK: @"OBJC_METACLASS_$_ObserverQuery" = global %struct._class_t
+// CHECK: @"\01L_OBJC_SELECTOR_REFERENCES_" = private externally_initialized global