| // Copyright 2012-2016 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. |
| |
| // Basic test for liveness constraints: the region (`R1`) that appears |
| // in the type of `p` includes the points after `&v[0]` up to (but not |
| // including) the call to `use_x`. The `else` branch is not included. |
| |
| // compile-flags:-Zborrowck=mir -Zverbose |
| // ^^^^^^^^^ force compiler to dump more region information |
| |
| #![allow(warnings)] |
| |
| fn use_x(_: usize) -> bool { true } |
| |
| fn main() { |
| let mut v = [1, 2, 3]; |
| let p = &v[0]; |
| let q = p; |
| if true { |
| use_x(*q); |
| } else { |
| use_x(22); |
| } |
| } |
| |
| // END RUST SOURCE |
| // START rustc.main.nll.0.mir |
| // | '_#2r | U0 | {bb2[0..=5], bb3[0..=1]} |
| // | '_#3r | U0 | {bb2[1..=5], bb3[0..=1]} |
| // | '_#4r | U0 | {bb2[4..=5], bb3[0..=1]} |
| // END rustc.main.nll.0.mir |
| // START rustc.main.nll.0.mir |
| // let _6: &'_#4r usize; |
| // ... |
| // let _2: &'_#3r usize; |
| // ... |
| // _2 = &'_#2r _1[_3]; |
| // ... |
| // _6 = _2; |
| // END rustc.main.nll.0.mir |
