1 files changed, 17 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-34427.rs b/src/test/ui/issues/issue-34427.rs
new file mode 100644
index 000000000..a14b5b9e2
--- /dev/null
+++ b/src/test/ui/issues/issue-34427.rs
@@ -0,0 +1,17 @@
+// run-pass
+// Issue #34427: On ARM, the code in `foo` at one time was generating
+// a machine code instruction of the form: `str r0, [r0, rN]!` (for
+// some N), which is not legal because the source register and base
+// register cannot be identical in the preindexed form signalled by
+// the `!`.
+//
+// See LLVM bug: https://llvm.org/bugs/show_bug.cgi?id=28809
+
+#[inline(never)]
+fn foo(n: usize) -> Vec<Option<(*mut (), &'static ())>> {
+    (0..n).map(|_| None).collect()
+}
+
+fn main() {
+    let _ = (foo(10), foo(32));
+}