mirror of
https://github.com/rust-lang/rust.git
synced 2024-10-31 06:22:00 +00:00
116 lines
4.0 KiB
Rust
116 lines
4.0 KiB
Rust
// compile-flags: -O
|
|
// ignore-debug (these add extra checks that make it hard to verify)
|
|
#![crate_type = "lib"]
|
|
#![feature(exact_size_is_empty)]
|
|
|
|
// The slice iterator used to `assume` that the `start` pointer was non-null.
|
|
// That ought to be unneeded, though, since the type is `NonNull`, so this test
|
|
// confirms that the appropriate metadata is included to denote that.
|
|
|
|
// It also used to `assume` the `end` pointer was non-null, but that's no longer
|
|
// needed as the code changed to read it as a `NonNull`, and thus gets the
|
|
// appropriate `!nonnull` annotations naturally.
|
|
|
|
// CHECK-LABEL: @slice_iter_next(
|
|
#[no_mangle]
|
|
pub fn slice_iter_next<'a>(it: &mut std::slice::Iter<'a, u32>) -> Option<&'a u32> {
|
|
// CHECK: %[[ENDP:.+]] = getelementptr inbounds i8, ptr %it, {{i32 4|i64 8}}
|
|
// CHECK: %[[END:.+]] = load ptr, ptr %[[ENDP]]
|
|
// CHECK-SAME: !nonnull
|
|
// CHECK-SAME: !noundef
|
|
// CHECK: %[[START:.+]] = load ptr, ptr %it,
|
|
// CHECK-SAME: !nonnull
|
|
// CHECK-SAME: !noundef
|
|
// CHECK: icmp eq ptr %[[START]], %[[END]]
|
|
|
|
// CHECK: store ptr{{.+}}, ptr %it,
|
|
|
|
it.next()
|
|
}
|
|
|
|
// CHECK-LABEL: @slice_iter_next_back(
|
|
#[no_mangle]
|
|
pub fn slice_iter_next_back<'a>(it: &mut std::slice::Iter<'a, u32>) -> Option<&'a u32> {
|
|
// CHECK: %[[ENDP:.+]] = getelementptr inbounds i8, ptr %it, {{i32 4|i64 8}}
|
|
// CHECK: %[[END:.+]] = load ptr, ptr %[[ENDP]]
|
|
// CHECK-SAME: !nonnull
|
|
// CHECK-SAME: !noundef
|
|
// CHECK: %[[START:.+]] = load ptr, ptr %it,
|
|
// CHECK-SAME: !nonnull
|
|
// CHECK-SAME: !noundef
|
|
// CHECK: icmp eq ptr %[[START]], %[[END]]
|
|
|
|
// CHECK: store ptr{{.+}}, ptr %[[ENDP]],
|
|
|
|
it.next_back()
|
|
}
|
|
|
|
// The slice iterator `new` methods used to `assume` that the pointer is non-null,
|
|
// but passing slices already requires that, to the extent that LLVM actually
|
|
// removed the `call @llvm.assume` anyway. These tests just demonstrate that the
|
|
// attribute is there, and confirms adding the assume back doesn't do anything.
|
|
|
|
// CHECK-LABEL: @slice_iter_new
|
|
// CHECK-SAME: (ptr noalias noundef nonnull {{.+}} %slice.0, {{.+}} noundef %slice.1)
|
|
#[no_mangle]
|
|
pub fn slice_iter_new(slice: &[u32]) -> std::slice::Iter<'_, u32> {
|
|
// CHECK-NOT: slice
|
|
// CHECK: %[[END:.+]] = getelementptr inbounds i32{{.+}} %slice.0{{.+}} %slice.1
|
|
// CHECK-NOT: slice
|
|
// CHECK: insertvalue {{.+}} ptr %slice.0, 0
|
|
// CHECK-NOT: slice
|
|
// CHECK: insertvalue {{.+}} ptr %[[END]], 1
|
|
// CHECK-NOT: slice
|
|
// CHECK: }
|
|
slice.iter()
|
|
}
|
|
|
|
// CHECK-LABEL: @slice_iter_mut_new
|
|
// CHECK-SAME: (ptr noalias noundef nonnull {{.+}} %slice.0, {{.+}} noundef %slice.1)
|
|
#[no_mangle]
|
|
pub fn slice_iter_mut_new(slice: &mut [u32]) -> std::slice::IterMut<'_, u32> {
|
|
// CHECK-NOT: slice
|
|
// CHECK: %[[END:.+]] = getelementptr inbounds i32{{.+}} %slice.0{{.+}} %slice.1
|
|
// CHECK-NOT: slice
|
|
// CHECK: insertvalue {{.+}} ptr %slice.0, 0
|
|
// CHECK-NOT: slice
|
|
// CHECK: insertvalue {{.+}} ptr %[[END]], 1
|
|
// CHECK-NOT: slice
|
|
// CHECK: }
|
|
slice.iter_mut()
|
|
}
|
|
|
|
// CHECK-LABEL: @slice_iter_is_empty
|
|
#[no_mangle]
|
|
pub fn slice_iter_is_empty(it: &std::slice::Iter<'_, u32>) -> bool {
|
|
// CHECK: %[[ENDP:.+]] = getelementptr inbounds i8, ptr %it, {{i32 4|i64 8}}
|
|
// CHECK: %[[END:.+]] = load ptr, ptr %[[ENDP]]
|
|
// CHECK-SAME: !nonnull
|
|
// CHECK-SAME: !noundef
|
|
// CHECK: %[[START:.+]] = load ptr, ptr %it,
|
|
// CHECK-SAME: !nonnull
|
|
// CHECK-SAME: !noundef
|
|
|
|
// CHECK: %[[RET:.+]] = icmp eq ptr %[[START]], %[[END]]
|
|
// CHECK: ret i1 %[[RET]]
|
|
it.is_empty()
|
|
}
|
|
|
|
// CHECK-LABEL: @slice_iter_len
|
|
#[no_mangle]
|
|
pub fn slice_iter_len(it: &std::slice::Iter<'_, u32>) -> usize {
|
|
// CHECK: %[[ENDP:.+]] = getelementptr inbounds i8, ptr %it, {{i32 4|i64 8}}
|
|
// CHECK: %[[END:.+]] = load ptr, ptr %[[ENDP]]
|
|
// CHECK-SAME: !nonnull
|
|
// CHECK-SAME: !noundef
|
|
// CHECK: %[[START:.+]] = load ptr, ptr %it,
|
|
// CHECK-SAME: !nonnull
|
|
// CHECK-SAME: !noundef
|
|
|
|
// CHECK: ptrtoint
|
|
// CHECK: ptrtoint
|
|
// CHECK: sub nuw
|
|
// CHECK: lshr exact
|
|
it.len()
|
|
}
|