1 // compile-flags: -O -C no-prepopulate-passes
5 use std::mem::MaybeUninit;
6 use std::num::NonZeroU64;
7 use std::marker::PhantomPinned;
14 pub struct UnsafeInner {
15 _field: std::cell::UnsafeCell<i16>,
20 _marker: PhantomPinned,
28 // CHECK: noundef zeroext i1 @boolean(i1 noundef zeroext %x)
30 pub fn boolean(x: bool) -> bool {
34 // CHECK: i8 @maybeuninit_boolean(i8 %x)
36 pub fn maybeuninit_boolean(x: MaybeUninit<bool>) -> MaybeUninit<bool> {
40 // CHECK: noundef zeroext i1 @enum_bool(i1 noundef zeroext %x)
42 pub fn enum_bool(x: MyBool) -> MyBool {
46 // CHECK: i8 @maybeuninit_enum_bool(i8 %x)
48 pub fn maybeuninit_enum_bool(x: MaybeUninit<MyBool>) -> MaybeUninit<MyBool> {
52 // CHECK: noundef i32 @char(i32 noundef %x)
54 pub fn char(x: char) -> char {
58 // CHECK: i32 @maybeuninit_char(i32 %x)
60 pub fn maybeuninit_char(x: MaybeUninit<char>) -> MaybeUninit<char> {
64 // CHECK: noundef i64 @int(i64 noundef %x)
66 pub fn int(x: u64) -> u64 {
70 // CHECK: noundef i64 @nonzero_int(i64 noundef %x)
72 pub fn nonzero_int(x: NonZeroU64) -> NonZeroU64 {
76 // CHECK: noundef i64 @option_nonzero_int(i64 noundef %x)
78 pub fn option_nonzero_int(x: Option<NonZeroU64>) -> Option<NonZeroU64> {
82 // CHECK: @readonly_borrow({{i32\*|ptr}} noalias noundef readonly align 4 dereferenceable(4) %_1)
83 // FIXME #25759 This should also have `nocapture`
85 pub fn readonly_borrow(_: &i32) {
88 // CHECK: noundef align 4 dereferenceable(4) {{i32\*|ptr}} @readonly_borrow_ret()
90 pub fn readonly_borrow_ret() -> &'static i32 {
94 // CHECK: @static_borrow({{i32\*|ptr}} noalias noundef readonly align 4 dereferenceable(4) %_1)
95 // static borrow may be captured
97 pub fn static_borrow(_: &'static i32) {
100 // CHECK: @named_borrow({{i32\*|ptr}} noalias noundef readonly align 4 dereferenceable(4) %_1)
101 // borrow with named lifetime may be captured
103 pub fn named_borrow<'r>(_: &'r i32) {
106 // CHECK: @unsafe_borrow({{i16\*|ptr}} noundef nonnull align 2 %_1)
107 // unsafe interior means this isn't actually readonly and there may be aliases ...
109 pub fn unsafe_borrow(_: &UnsafeInner) {
112 // CHECK: @mutable_unsafe_borrow({{i16\*|ptr}} noalias noundef align 2 dereferenceable(2) %_1)
113 // ... unless this is a mutable borrow, those never alias
115 pub fn mutable_unsafe_borrow(_: &mut UnsafeInner) {
118 // CHECK: @mutable_borrow({{i32\*|ptr}} noalias noundef align 4 dereferenceable(4) %_1)
119 // FIXME #25759 This should also have `nocapture`
121 pub fn mutable_borrow(_: &mut i32) {
124 // CHECK: noundef align 4 dereferenceable(4) {{i32\*|ptr}} @mutable_borrow_ret()
126 pub fn mutable_borrow_ret() -> &'static mut i32 {
131 // CHECK: @mutable_notunpin_borrow({{i32\*|ptr}} noundef nonnull align 4 %_1)
132 // This one is *not* `noalias` because it might be self-referential.
133 // It is also not `dereferenceable` due to
134 // <https://github.com/rust-lang/unsafe-code-guidelines/issues/381>.
135 pub fn mutable_notunpin_borrow(_: &mut NotUnpin) {
138 // CHECK: @notunpin_borrow({{i32\*|ptr}} noalias noundef readonly align 4 dereferenceable(4) %_1)
139 // But `&NotUnpin` behaves perfectly normal.
141 pub fn notunpin_borrow(_: &NotUnpin) {
144 // CHECK: @indirect_struct({{%S\*|ptr}} noalias nocapture noundef readonly dereferenceable(32) %_1)
146 pub fn indirect_struct(_: S) {
149 // CHECK: @borrowed_struct({{%S\*|ptr}} noalias noundef readonly align 4 dereferenceable(32) %_1)
150 // FIXME #25759 This should also have `nocapture`
152 pub fn borrowed_struct(_: &S) {
155 // CHECK: @option_borrow({{i32\*|ptr}} noalias noundef readonly align 4 dereferenceable_or_null(4) %x)
157 pub fn option_borrow(x: Option<&i32>) {
160 // CHECK: @option_borrow_mut({{i32\*|ptr}} noalias noundef align 4 dereferenceable_or_null(4) %x)
162 pub fn option_borrow_mut(x: Option<&mut i32>) {
165 // CHECK: @raw_struct({{%S\*|ptr}} noundef %_1)
167 pub fn raw_struct(_: *const S) {
170 // CHECK: @raw_option_nonnull_struct({{i32\*|ptr}} noundef %_1)
172 pub fn raw_option_nonnull_struct(_: Option<NonNull<S>>) {
176 // `Box` can get deallocated during execution of the function, so it should
177 // not get `dereferenceable`.
178 // CHECK: noundef nonnull align 4 {{i32\*|ptr}} @_box({{i32\*|ptr}} noalias noundef nonnull align 4 %x)
180 pub fn _box(x: Box<i32>) -> Box<i32> {
184 // CHECK: @struct_return({{%S\*|ptr}} noalias nocapture noundef sret(%S) dereferenceable(32){{( %0)?}})
186 pub fn struct_return() -> S {
188 _field: [0, 0, 0, 0, 0, 0, 0, 0]
192 // Hack to get the correct size for the length part in slices
193 // CHECK: @helper([[USIZE:i[0-9]+]] noundef %_1)
195 pub fn helper(_: usize) {
198 // CHECK: @slice({{\[0 x i8\]\*|ptr}} noalias noundef nonnull readonly align 1 %_1.0, [[USIZE]] noundef %_1.1)
199 // FIXME #25759 This should also have `nocapture`
201 pub fn slice(_: &[u8]) {
204 // CHECK: @mutable_slice({{\[0 x i8\]\*|ptr}} noalias noundef nonnull align 1 %_1.0, [[USIZE]] noundef %_1.1)
205 // FIXME #25759 This should also have `nocapture`
207 pub fn mutable_slice(_: &mut [u8]) {
210 // CHECK: @unsafe_slice({{\[0 x i16\]\*|ptr}} noundef nonnull align 2 %_1.0, [[USIZE]] noundef %_1.1)
211 // unsafe interior means this isn't actually readonly and there may be aliases ...
213 pub fn unsafe_slice(_: &[UnsafeInner]) {
216 // CHECK: @raw_slice({{\[0 x i8\]\*|ptr}} noundef %_1.0, [[USIZE]] noundef %_1.1)
218 pub fn raw_slice(_: *const [u8]) {
221 // CHECK: @str({{\[0 x i8\]\*|ptr}} noalias noundef nonnull readonly align 1 %_1.0, [[USIZE]] noundef %_1.1)
222 // FIXME #25759 This should also have `nocapture`
224 pub fn str(_: &[u8]) {
227 // CHECK: @trait_borrow({{\{\}\*|ptr}} noundef nonnull align 1 %_1.0, {{.+}} noalias noundef readonly align {{.*}} dereferenceable({{.*}}) %_1.1)
228 // FIXME #25759 This should also have `nocapture`
230 pub fn trait_borrow(_: &dyn Drop) {
233 // CHECK: @option_trait_borrow({{i8\*|ptr}} noundef align 1 %x.0, {{i8\*|ptr}} %x.1)
235 pub fn option_trait_borrow(x: Option<&dyn Drop>) {
238 // CHECK: @option_trait_borrow_mut({{i8\*|ptr}} noundef align 1 %x.0, {{i8\*|ptr}} %x.1)
240 pub fn option_trait_borrow_mut(x: Option<&mut dyn Drop>) {
243 // CHECK: @trait_raw({{\{\}\*|ptr}} noundef %_1.0, {{.+}} noalias noundef readonly align {{.*}} dereferenceable({{.*}}) %_1.1)
245 pub fn trait_raw(_: *const dyn Drop) {
248 // CHECK: @trait_box({{\{\}\*|ptr}} noalias noundef nonnull align 1{{( %0)?}}, {{.+}} noalias noundef readonly align {{.*}} dereferenceable({{.*}}){{( %1)?}})
250 pub fn trait_box(_: Box<dyn Drop>) {
253 // CHECK: { {{i8\*|ptr}}, {{i8\*|ptr}} } @trait_option({{i8\*|ptr}} noalias noundef align 1 %x.0, {{i8\*|ptr}} %x.1)
255 pub fn trait_option(x: Option<Box<dyn Drop>>) -> Option<Box<dyn Drop>> {
259 // CHECK: { {{\[0 x i16\]\*|ptr}}, [[USIZE]] } @return_slice({{\[0 x i16\]\*|ptr}} noalias noundef nonnull readonly align 2 %x.0, [[USIZE]] noundef %x.1)
261 pub fn return_slice(x: &[u16]) -> &[u16] {
265 // CHECK: { i16, i16 } @enum_id_1(i16 noundef %x.0, i16 %x.1)
267 pub fn enum_id_1(x: Option<Result<u16, u16>>) -> Option<Result<u16, u16>> {
271 // CHECK: { i8, i8 } @enum_id_2(i1 noundef zeroext %x.0, i8 %x.1)
273 pub fn enum_id_2(x: Option<u8>) -> Option<u8> {