1 // compile-flags: -C no-prepopulate-passes
2 // ignore-tidy-linelength
5 #![feature(rustc_attrs)]
11 pub struct UnsafeInner {
12 _field: std::cell::UnsafeCell<i16>,
15 // CHECK: zeroext i1 @boolean(i1 zeroext %x)
17 pub fn boolean(x: bool) -> bool {
21 // CHECK: @readonly_borrow(i32* noalias readonly align 4 dereferenceable(4) %_1)
22 // FIXME #25759 This should also have `nocapture`
24 pub fn readonly_borrow(_: &i32) {
27 // CHECK: @static_borrow(i32* noalias readonly align 4 dereferenceable(4) %_1)
28 // static borrow may be captured
30 pub fn static_borrow(_: &'static i32) {
33 // CHECK: @named_borrow(i32* noalias readonly align 4 dereferenceable(4) %_1)
34 // borrow with named lifetime may be captured
36 pub fn named_borrow<'r>(_: &'r i32) {
39 // CHECK: @unsafe_borrow(i16* align 2 dereferenceable(2) %_1)
40 // unsafe interior means this isn't actually readonly and there may be aliases ...
42 pub fn unsafe_borrow(_: &UnsafeInner) {
45 // CHECK: @mutable_unsafe_borrow(i16* align 2 dereferenceable(2) %_1)
46 // ... unless this is a mutable borrow, those never alias
48 pub fn mutable_unsafe_borrow(_: &mut UnsafeInner) {
51 // CHECK: @mutable_borrow(i32* align 4 dereferenceable(4) %_1)
52 // FIXME #25759 This should also have `nocapture`
54 pub fn mutable_borrow(_: &mut i32) {
57 // CHECK: @indirect_struct(%S* noalias nocapture dereferenceable(32) %_1)
59 pub fn indirect_struct(_: S) {
62 // CHECK: @borrowed_struct(%S* noalias readonly align 4 dereferenceable(32) %_1)
63 // FIXME #25759 This should also have `nocapture`
65 pub fn borrowed_struct(_: &S) {
68 // `Box` can get deallocated during execution of the function, so it should
69 // not get `dereferenceable`.
70 // CHECK: noalias nonnull align 4 i32* @_box(i32* noalias nonnull align 4 %x)
72 pub fn _box(x: Box<i32>) -> Box<i32> {
76 // CHECK: @struct_return(%S* noalias nocapture sret dereferenceable(32){{( %0)?}})
78 pub fn struct_return() -> S {
80 _field: [0, 0, 0, 0, 0, 0, 0, 0]
84 // Hack to get the correct size for the length part in slices
85 // CHECK: @helper([[USIZE:i[0-9]+]] %_1)
87 pub fn helper(_: usize) {
90 // CHECK: @slice([0 x i8]* noalias nonnull readonly align 1 %_1.0, [[USIZE]] %_1.1)
91 // FIXME #25759 This should also have `nocapture`
93 pub fn slice(_: &[u8]) {
96 // CHECK: @mutable_slice([0 x i8]* nonnull align 1 %_1.0, [[USIZE]] %_1.1)
97 // FIXME #25759 This should also have `nocapture`
99 pub fn mutable_slice(_: &mut [u8]) {
102 // CHECK: @unsafe_slice([0 x i16]* nonnull align 2 %_1.0, [[USIZE]] %_1.1)
103 // unsafe interior means this isn't actually readonly and there may be aliases ...
105 pub fn unsafe_slice(_: &[UnsafeInner]) {
108 // CHECK: @str([0 x i8]* noalias nonnull readonly align 1 %_1.0, [[USIZE]] %_1.1)
109 // FIXME #25759 This should also have `nocapture`
111 pub fn str(_: &[u8]) {
114 // CHECK: @trait_borrow({}* nonnull align 1 %_1.0, [3 x [[USIZE]]]* noalias readonly align {{.*}} dereferenceable({{.*}}) %_1.1)
115 // FIXME #25759 This should also have `nocapture`
117 pub fn trait_borrow(_: &Drop) {
120 // CHECK: @trait_box({}* noalias nonnull align 1{{( %0)?}}, [3 x [[USIZE]]]* noalias readonly align {{.*}} dereferenceable({{.*}}){{( %1)?}})
122 pub fn trait_box(_: Box<Drop>) {
125 // CHECK: { i8*, i8* } @trait_option(i8* noalias align 1 %x.0, i8* %x.1)
127 pub fn trait_option(x: Option<Box<Drop>>) -> Option<Box<Drop>> {
131 // CHECK: { [0 x i16]*, [[USIZE]] } @return_slice([0 x i16]* noalias nonnull readonly align 2 %x.0, [[USIZE]] %x.1)
133 pub fn return_slice(x: &[u16]) -> &[u16] {
137 // CHECK: { i16, i16 } @enum_id_1(i16 %x.0, i16 %x.1)
139 pub fn enum_id_1(x: Option<Result<u16, u16>>) -> Option<Result<u16, u16>> {
143 // CHECK: { i8, i8 } @enum_id_2(i1 zeroext %x.0, i8 %x.1)
145 pub fn enum_id_2(x: Option<u8>) -> Option<u8> {
149 // CHECK: noalias i8* @allocator()
152 pub fn allocator() -> *const i8 {