Merging upstream version 1.68.2+dfsg1.

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

1 files changed, 26 insertions, 0 deletions

diff --git a/tests/ui/consts/const-eval/nrvo.rs b/tests/ui/consts/const-eval/nrvo.rs
new file mode 100644
index 000000000..1d2c6acc0
--- /dev/null
+++ b/tests/ui/consts/const-eval/nrvo.rs
@@ -0,0 +1,26 @@
+// run-pass
+
+// When the NRVO is applied, the return place (`_0`) gets treated like a normal local. For example,
+// its address may be taken and it may be written to indirectly. Ensure that MIRI can handle this.
+
+#![feature(const_mut_refs)]
+
+#[inline(never)] // Try to ensure that MIR optimizations don't optimize this away.
+const fn init(buf: &mut [u8; 1024]) {
+    buf[33] = 3;
+    buf[444] = 4;
+}
+
+const fn nrvo() -> [u8; 1024] {
+    let mut buf = [0; 1024];
+    init(&mut buf);
+    buf
+}
+
+const BUF: [u8; 1024] = nrvo();
+
+fn main() {
+    assert_eq!(BUF[33], 3);
+    assert_eq!(BUF[19], 0);
+    assert_eq!(BUF[444], 4);
+}