// 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));
}