From c41a806e4efb8f6dc614ff0675189a6a2bdc8abf Mon Sep 17 00:00:00 2001
From: "Felix S. Klock II" <pnkfelix@pnkfx.org>
Date: Thu, 15 Sep 2016 19:02:10 +0200
Subject: Workaround #34427 by using memset of 0 on ARM to set the
 discriminant.

---
 src/test/run-pass/issue-34427.rs | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 src/test/run-pass/issue-34427.rs

(limited to 'src/test')

diff --git a/src/test/run-pass/issue-34427.rs b/src/test/run-pass/issue-34427.rs
new file mode 100644
index 00000000000..6bf8a2ac6a7
--- /dev/null
+++ b/src/test/run-pass/issue-34427.rs
@@ -0,0 +1,26 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// 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));
+}
-- 
cgit 1.4.1-3-g733a5