mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-02 07:22:42 +00:00
43 lines
1.4 KiB
Rust
43 lines
1.4 KiB
Rust
// no-system-llvm
|
|
// compile-flags: -O
|
|
// ignore-debug (these add extra checks that make it hard to verify)
|
|
#![crate_type = "lib"]
|
|
|
|
// 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.
|
|
|
|
// 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{{.+}}ptr %it,{{.+}} 1
|
|
// 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{{.+}}ptr %it,{{.+}} 1
|
|
// 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()
|
|
}
|