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1// RUN: %clang_cc1 -fobjc-arc -emit-llvm -triple x86_64-apple-darwin -o - %s | FileCheck %s2 3@interface NSMutableArray4- (id)objectAtIndexedSubscript:(int)index;5- (void)setObject:(id)object atIndexedSubscript:(int)index;6@end7 8id func(void) {9 NSMutableArray *array;10 array[3] = 0;11 return array[3];12}13 14// CHECK: [[call:%.*]] = call ptr @objc_msgSend15// CHECK: [[SIX:%.*]] = notail call ptr @llvm.objc.retainAutoreleasedReturnValue(ptr [[call]]) [[NUW:#[0-9]+]]16// CHECK: call void @llvm.objc.storeStrong(ptr {{%.*}}, ptr null)17// CHECK: [[EIGHT:%.*]] = tail call ptr @llvm.objc.autoreleaseReturnValue(ptr [[SIX]]) [[NUW]]18// CHECK: ret ptr [[EIGHT]]19 20// CHECK: attributes [[NUW]] = { nounwind }21