1// 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 2// rdar://12530881 3 4void test19() { 5 __block id x; 6// CHECK-UNOPT-LABEL: define internal void @__Block_byref_object_copy 7// CHECK-UNOPT: [[X:%.*]] = getelementptr inbounds [[BYREF_T:%.*]], [[BYREF_T:%.*]]* [[VAR:%.*]], i32 0, i32 6 8// CHECK-UNOPT: [[X2:%.*]] = getelementptr inbounds [[BYREF_T:%.*]], [[BYREF_T:%.*]]* [[VAR1:%.*]], i32 0, i32 6 9// CHECK-UNOPT-NEXT: [[SIX:%.*]] = load i8*, i8** [[X2]], align 8 10// CHECK-UNOPT-NEXT: store i8* null, i8** [[X]], align 8 11// CHECK-UNOPT-NEXT: call void @objc_storeStrong(i8** [[X]], i8* [[SIX]]) [[NUW:#[0-9]+]] 12// CHECK-UNOPT-NEXT: call void @objc_storeStrong(i8** [[X2]], i8* null) [[NUW]] 13// CHECK-UNOPT-NEXT: ret void 14} 15 16// CHECK: attributes [[NUW]] = { nounwind } 17