llvm-project

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// 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
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void test19(void) {
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   __block id x;
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   ^{ (void)x; };
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// CHECK-UNOPT-LABEL: define internal void @__Block_byref_object_copy
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// CHECK-UNOPT: [[X:%.*]] = getelementptr inbounds [[BYREF_T:%.*]], ptr [[VAR:%.*]], i32 0, i32 6
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// CHECK-UNOPT: [[X2:%.*]] = getelementptr inbounds [[BYREF_T:%.*]], ptr [[VAR1:%.*]], i32 0, i32 6
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// CHECK-UNOPT-NEXT: [[SIX:%.*]] = load ptr, ptr [[X2]], align 8
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// CHECK-UNOPT-NEXT: store ptr null, ptr [[X]], align 8
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// CHECK-UNOPT-NEXT: call void @llvm.objc.storeStrong(ptr [[X]], ptr [[SIX]]) [[NUW:#[0-9]+]]
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// CHECK-UNOPT-NEXT: call void @llvm.objc.storeStrong(ptr [[X2]], ptr null) [[NUW]]
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// CHECK-UNOPT-NEXT: ret void
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}
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// CHECK: attributes [[NUW]] = { nounwind }
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