| // 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. |
| |
| // compile-flags: -C no-prepopulate-passes |
| |
| #![feature(core_intrinsics)] |
| #![crate_type = "lib"] |
| |
| // test that `move_val_init` actually avoids big allocas |
| |
| use std::intrinsics::move_val_init; |
| |
| pub struct Big { |
| pub data: [u8; 65536] |
| } |
| |
| // CHECK-LABEL: @test_mvi |
| #[no_mangle] |
| pub unsafe fn test_mvi(target: *mut Big, make_big: fn() -> Big) { |
| // CHECK: call void %make_big(%Big*{{[^%]*}} %target) |
| move_val_init(target, make_big()); |
| } |
