; RUN: opt -objc-arc -S < %s | FileCheck %s
-declare i8* @objc_release(i8* %x)
+declare void @objc_release(i8* %x)
declare i8* @objc_retain(i8* %x)
declare i8* @objc_autorelease(i8* %x)
declare i8* @objc_autoreleaseReturnValue(i8* %x)
declare i8* @objc_retainAutoreleasedReturnValue(i8* %x)
+declare i8* @tmp(i8*)
; Never tail call objc_autorelease.
-define i8* @test0(i8* %x) {
+
+; CHECK: define i8* @test0(i8* %x) [[NUW:#[0-9]+]] {
+; CHECK: %tmp0 = call i8* @objc_autorelease(i8* %x) [[NUW]]
+; CHECK: %tmp1 = call i8* @objc_autorelease(i8* %x) [[NUW]]
+; CHECK: }
+define i8* @test0(i8* %x) nounwind {
entry:
- ; CHECK: %tmp0 = call i8* @objc_autorelease(i8* %x)
%tmp0 = call i8* @objc_autorelease(i8* %x)
- ; CHECK: %tmp1 = call i8* @objc_autorelease(i8* %x)
%tmp1 = tail call i8* @objc_autorelease(i8* %x)
ret i8* %x
}
; Always tail call autoreleaseReturnValue.
-define i8* @test1(i8* %x) {
+
+; CHECK: define i8* @test1(i8* %x) [[NUW]] {
+; CHECK: %tmp0 = tail call i8* @objc_autoreleaseReturnValue(i8* %x) [[NUW]]
+; CHECK: %tmp1 = tail call i8* @objc_autoreleaseReturnValue(i8* %x) [[NUW]]
+; CHECK: }
+define i8* @test1(i8* %x) nounwind {
entry:
- ; CHECK: %tmp0 = tail call i8* @objc_autoreleaseReturnValue(i8* %x)
%tmp0 = call i8* @objc_autoreleaseReturnValue(i8* %x)
- ; CHECK: %tmp1 = tail call i8* @objc_autoreleaseReturnValue(i8* %x)
%tmp1 = tail call i8* @objc_autoreleaseReturnValue(i8* %x)
ret i8* %x
}
; Always tail call objc_retain.
-define i8* @test2(i8* %x) {
+
+; CHECK: define i8* @test2(i8* %x) [[NUW]] {
+; CHECK: %tmp0 = tail call i8* @objc_retain(i8* %x) [[NUW]]
+; CHECK: %tmp1 = tail call i8* @objc_retain(i8* %x) [[NUW]]
+; CHECK: }
+define i8* @test2(i8* %x) nounwind {
entry:
- ; CHECK: %tmp0 = tail call i8* @objc_retain(i8* %x)
%tmp0 = call i8* @objc_retain(i8* %x)
- ; CHECK: %tmp1 = tail call i8* @objc_retain(i8* %x)
%tmp1 = tail call i8* @objc_retain(i8* %x)
ret i8* %x
}
-define i8* @tmp(i8* %x) {
- ret i8* %x
-}
-
; Always tail call objc_retainAutoreleasedReturnValue.
-define i8* @test3(i8* %x) {
+; CHECK: define i8* @test3(i8* %x) [[NUW]] {
+; CHECK: %tmp0 = tail call i8* @objc_retainAutoreleasedReturnValue(i8* %y) [[NUW]]
+; CHECK: %tmp1 = tail call i8* @objc_retainAutoreleasedReturnValue(i8* %z) [[NUW]]
+; CHECK: }
+define i8* @test3(i8* %x) nounwind {
entry:
%y = call i8* @tmp(i8* %x)
- ; CHECK: %tmp0 = tail call i8* @objc_retainAutoreleasedReturnValue(i8* %y)
%tmp0 = call i8* @objc_retainAutoreleasedReturnValue(i8* %y)
%z = call i8* @tmp(i8* %x)
- ; CHECK: %tmp1 = tail call i8* @objc_retainAutoreleasedReturnValue(i8* %z)
%tmp1 = tail call i8* @objc_retainAutoreleasedReturnValue(i8* %z)
ret i8* %x
}
; By itself, we should never change whether or not objc_release is tail called.
-define i8* @test4(i8* %x) {
+
+; CHECK: define void @test4(i8* %x) [[NUW]] {
+; CHECK: call void @objc_release(i8* %x) [[NUW]]
+; CHECK: tail call void @objc_release(i8* %x) [[NUW]]
+; CHECK: }
+define void @test4(i8* %x) nounwind {
entry:
- ; CHECK: %tmp0 = call i8* @objc_release(i8* %x)
- %tmp0 = call i8* @objc_release(i8* %x)
- ; CHECK: %tmp1 = tail call i8* @objc_release(i8* %x)
- %tmp1 = tail call i8* @objc_release(i8* %x)
- ret i8* %x
+ call void @objc_release(i8* %x)
+ tail call void @objc_release(i8* %x)
+ ret void
}
; If we convert a tail called @objc_autoreleaseReturnValue to an
; @objc_autorelease, ensure that the tail call is removed.
-define i8* @test5(i8* %x) {
+; CHECK: define i8* @test5(i8* %x) [[NUW]] {
+; CHECK: %tmp0 = call i8* @objc_autorelease(i8* %x) [[NUW]]
+; CHECK: }
+define i8* @test5(i8* %x) nounwind {
entry:
- ; CHECK: %tmp0 = call i8* @objc_autorelease(i8* %x)
%tmp0 = tail call i8* @objc_autoreleaseReturnValue(i8* %x)
ret i8* %tmp0
}
+; CHECK: attributes [[NUW]] = { nounwind }
+