blob: 320ea6b5cc4e381b571b9607692cfe847f239f2f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
// Copyright 2017 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.
// Test that llvm generates `memcpy` for moving a value
// inside a function and moving an argument.
struct Foo {
x: Vec<i32>,
}
#[inline(never)]
#[no_mangle]
// CHECK: memcpy
fn interior(x: Vec<i32>) -> Vec<i32> {
let Foo { x } = Foo { x: x };
x
}
#[inline(never)]
#[no_mangle]
// CHECK: memcpy
fn exterior(x: Vec<i32>) -> Vec<i32> {
x
}
fn main() {
let x = interior(Vec::new());
println!("{:?}", x);
let x = exterior(Vec::new());
println!("{:?}", x);
}
|
