Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 52 insertions, 0 deletions

diff --git a/tests/ui/consts/copy-intrinsic.rs b/tests/ui/consts/copy-intrinsic.rs
new file mode 100644
index 000000000..94d7bdc6b
--- /dev/null
+++ b/tests/ui/consts/copy-intrinsic.rs
@@ -0,0 +1,52 @@
+#![stable(feature = "dummy", since = "1.0.0")]
+
+// ignore-tidy-linelength
+#![feature(intrinsics, staged_api)]
+#![feature(const_mut_refs)]
+use std::mem;
+
+extern "rust-intrinsic" {
+    #[rustc_const_stable(feature = "const_intrinsic_copy", since = "1.63.0")]
+    fn copy_nonoverlapping<T>(src: *const T, dst: *mut T, count: usize);
+
+    #[rustc_const_stable(feature = "const_intrinsic_copy", since = "1.63.0")]
+    fn copy<T>(src: *const T, dst: *mut T, count: usize);
+}
+
+const COPY_ZERO: () = unsafe {
+    // Since we are not copying anything, this should be allowed.
+    let src = ();
+    let mut dst = ();
+    copy_nonoverlapping(&src as *const _ as *const u8, &mut dst as *mut _ as *mut u8, 0);
+};
+
+const COPY_OOB_1: () = unsafe {
+    let mut x = 0i32;
+    let dangle = (&mut x as *mut i32).wrapping_add(10);
+    // Even if the first ptr is an int ptr and this is a ZST copy, we should detect dangling 2nd ptrs.
+    copy_nonoverlapping(0x100 as *const i32, dangle, 0); //~ ERROR evaluation of constant value failed [E0080]
+    //~| pointer at offset 40 is out-of-bounds
+};
+const COPY_OOB_2: () = unsafe {
+    let x = 0i32;
+    let dangle = (&x as *const i32).wrapping_add(10);
+    // Even if the second ptr is an int ptr and this is a ZST copy, we should detect dangling 1st ptrs.
+    copy_nonoverlapping(dangle, 0x100 as *mut i32, 0); //~ ERROR evaluation of constant value failed [E0080]
+    //~| pointer at offset 40 is out-of-bounds
+};
+
+const COPY_SIZE_OVERFLOW: () = unsafe {
+    let x = 0;
+    let mut y = 0;
+    copy(&x, &mut y, 1usize << (mem::size_of::<usize>() * 8 - 1)); //~ ERROR evaluation of constant value failed [E0080]
+    //~| overflow computing total size of `copy`
+};
+const COPY_NONOVERLAPPING_SIZE_OVERFLOW: () = unsafe {
+    let x = 0;
+    let mut y = 0;
+    copy_nonoverlapping(&x, &mut y, 1usize << (mem::size_of::<usize>() * 8 - 1)); //~ evaluation of constant value failed [E0080]
+    //~| overflow computing total size of `copy_nonoverlapping`
+};
+
+fn main() {
+}