|  | // RUN: %clang_cc1 -fobjc-arc -emit-llvm -triple x86_64-apple-darwin -o - %s | FileCheck %s | 
|  |  | 
|  | @interface NSMutableArray | 
|  | - (id)objectAtIndexedSubscript:(int)index; | 
|  | - (void)setObject:(id)object atIndexedSubscript:(int)index; | 
|  | @end | 
|  |  | 
|  | id func() { | 
|  | NSMutableArray *array; | 
|  | array[3] = 0; | 
|  | return array[3]; | 
|  | } | 
|  |  | 
|  | // CHECK: [[call:%.*]] = call i8* bitcast (i8* (i8*, i8*, ...)* @objc_msgSend | 
|  | // CHECK: [[SIX:%.*]] = call i8* @objc_retainAutoreleasedReturnValue(i8* [[call]]) [[NUW:#[0-9]+]] | 
|  | // CHECK: [[ARRAY_CASTED:%.*]] = bitcast %0** {{%.*}} to i8** | 
|  | // CHECK: call void @objc_storeStrong(i8** [[ARRAY_CASTED]], i8* null) | 
|  | // CHECK: [[EIGHT:%.*]] = tail call i8* @objc_autoreleaseReturnValue(i8* [[SIX]]) [[NUW]] | 
|  | // CHECK: ret i8* [[EIGHT]] | 
|  |  | 
|  | // CHECK: attributes [[NUW]] = { nounwind } |