1; RUN: opt -S -objc-arc-contract < %s | FileCheck %s 2 3; CHECK-LABEL: define void @foo() { 4; CHECK: %call = tail call i32* @qux() 5; CHECK-NEXT: %tcall = bitcast i32* %call to i8* 6; CHECK-NEXT: call void asm sideeffect "mov\09r7, r7\09\09@ marker for return value optimization", ""() 7; CHECK-NEXT: %0 = tail call i8* @objc_retainAutoreleasedReturnValue(i8* %tcall) [[NUW:#[0-9]+]] 8; CHECK: } 9 10define void @foo() { 11entry: 12 %call = tail call i32* @qux() 13 %tcall = bitcast i32* %call to i8* 14 %0 = tail call i8* @objc_retainAutoreleasedReturnValue(i8* %tcall) nounwind 15 tail call void @bar(i8* %0) 16 ret void 17} 18 19; CHECK-LABEL: define void @foo2() { 20; CHECK: %call = tail call i32* @qux() 21; CHECK-NEXT: %tcall = bitcast i32* %call to i8* 22; CHECK-NEXT: call void asm sideeffect "mov\09r7, r7\09\09@ marker for return value optimization", ""() 23; CHECK-NEXT: %0 = tail call i8* @objc_unsafeClaimAutoreleasedReturnValue(i8* %tcall) [[NUW:#[0-9]+]] 24; CHECK: } 25 26define void @foo2() { 27entry: 28 %call = tail call i32* @qux() 29 %tcall = bitcast i32* %call to i8* 30 %0 = tail call i8* @objc_unsafeClaimAutoreleasedReturnValue(i8* %tcall) nounwind 31 tail call void @bar(i8* %0) 32 ret void 33} 34 35 36declare i32* @qux() 37declare i8* @objc_retainAutoreleasedReturnValue(i8*) 38declare i8* @objc_unsafeClaimAutoreleasedReturnValue(i8*) 39declare void @bar(i8*) 40 41!clang.arc.retainAutoreleasedReturnValueMarker = !{!0} 42 43!0 = !{!"mov\09r7, r7\09\09@ marker for return value optimization"} 44 45; CHECK: attributes [[NUW]] = { nounwind } 46