| // 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. |
| |
| // compile-flags: -C no-prepopulate-passes |
| |
| #![crate_type = "lib"] |
| use std::marker::PhantomData; |
| |
| #[derive(Copy, Clone)] |
| struct Zst { phantom: PhantomData<Zst> } |
| |
| // CHECK-LABEL: @mir |
| // CHECK-NOT: store{{.*}}undef |
| #[no_mangle] |
| pub fn mir() { |
| let x = Zst { phantom: PhantomData }; |
| let y = (x, 0); |
| drop(y); |
| drop((0, x)); |
| } |