Auto merge of #128614 - matthiaskrgr:rollup-d2fextz, r=matthiaskrgr

Rollup of 7 pull requests

Successful merges:

 - #127921 (Stabilize unsafe extern blocks (RFC 3484))
 - #128283 (bootstrap: fix bug preventing the use of custom targets)
 - #128530 (Implement `UncheckedIterator` directly for `RepeatN`)
 - #128551 (chore: refactor backtrace style in panic)
 - #128573 (Simplify `body` usage in rustdoc)
 - #128581 (Assert that all attributes are actually checked via `CheckAttrVisitor` and aren't accidentally usable on completely unrelated HIR nodes)
 - #128603 (Update run-make/used to use `any_symbol_contains`)

r? `@ghost`
`@rustbot` modify labels: rollup

1 files changed, 14 insertions, 1 deletions

diff --git a/tests/codegen/iter-repeat-n-trivial-drop.rs b/tests/codegen/iter-repeat-n-trivial-drop.rs
index 31020b77984..7de224b92d8 100644
--- a/tests/codegen/iter-repeat-n-trivial-drop.rs
+++ b/tests/codegen/iter-repeat-n-trivial-drop.rs
@@ -1,8 +1,9 @@
-//@ compile-flags: -O
+//@ compile-flags: -C opt-level=3
 //@ only-x86_64
 
 #![crate_type = "lib"]
 #![feature(iter_repeat_n)]
+#![feature(array_repeat)]
 
 #[derive(Clone)]
 pub struct NotCopy(u16);
@@ -54,3 +55,15 @@ pub fn vec_extend_via_iter_repeat_n() -> Vec<u8> {
     v.extend(std::iter::repeat_n(42_u8, n));
     v
 }
+
+// Array repeat uses `RepeatN::next_unchecked` internally,
+// so also check that the distinction disappears there.
+
+#[no_mangle]
+// CHECK-LABEL: @array_repeat_not_copy
+pub unsafe fn array_repeat_not_copy(item: NotCopy) -> [NotCopy; 8] {
+    // CHECK: insertelement {{.+}} i16 %item
+    // CHECK: shufflevector <8 x i16> {{.+}} zeroinitializer
+    // CHECK: store <8 x i16>
+    std::array::repeat(item)
+}