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 10 define void @foo() { 11 entry: 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 26 define void @foo2() { 27 entry: 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 36 declare i32* @qux() 37 declare i8* @objc_retainAutoreleasedReturnValue(i8*) 38 declare i8* @objc_unsafeClaimAutoreleasedReturnValue(i8*) 39 declare 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
