| // RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fblocks -fobjc-arc -fobjc-runtime-has-weak -o - %s | FileCheck -check-prefix=CHECK-UNOPT %s |
| // rdar://12530881 |
| |
| void test19() { |
| __block id x; |
| // CHECK-UNOPT: define internal void @__Block_byref_object_copy |
| // CHECK-UNOPT: [[X:%.*]] = getelementptr inbounds [[BYREF_T:%.*]]* [[VAR:%.*]], i32 0, i32 6 |
| // CHECK-UNOPT: [[X2:%.*]] = getelementptr inbounds [[BYREF_T:%.*]]* [[VAR1:%.*]], i32 0, i32 6 |
| // CHECK-UNOPT-NEXT: [[SIX:%.*]] = load i8** [[X2]], align 8 |
| // CHECK-UNOPT-NEXT: store i8* null, i8** [[X]], align 8 |
| // CHECK-UNOPT-NEXT: call void @objc_storeStrong(i8** [[X]], i8* [[SIX]]) [[NUW:#[0-9]+]] |
| // CHECK-UNOPT-NEXT: call void @objc_storeStrong(i8** [[X2]], i8* null) [[NUW]] |
| // CHECK-UNOPT-NEXT: ret void |
| } |
| |
| // CHECK: attributes [[NUW]] = { nounwind } |
