| // Copyright 2018 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 |
| // `#[no_mangle]`d functions always have external linkage, i.e., no `internal` in their `define`s |
| |
| #![crate_type = "lib"] |
| #![no_std] |
| |
| // CHECK: define void @a() |
| #[no_mangle] |
| fn a() {} |
| |
| // CHECK: define void @b() |
| #[no_mangle] |
| pub fn b() {} |
| |
| mod private { |
| // CHECK: define void @c() |
| #[no_mangle] |
| fn c() {} |
| |
| // CHECK: define void @d() |
| #[no_mangle] |
| pub fn d() {} |
| } |
| |
| const HIDDEN: () = { |
| // CHECK: define void @e() |
| #[no_mangle] |
| fn e() {} |
| |
| // CHECK: define void @f() |
| #[no_mangle] |
| pub fn f() {} |
| }; |
| |
| // The surrounding item should not accidentally become external |
| // CHECK: define internal{{.*}} void @_ZN22external_no_mangle_fns1x |
| #[inline(never)] |
| fn x() { |
| // CHECK: define void @g() |
| #[no_mangle] |
| fn g() { |
| x(); |
| } |
| |
| // CHECK: define void @h() |
| #[no_mangle] |
| pub fn h() {} |
| |
| // side effect to keep `x` around |
| unsafe { |
| core::ptr::read_volatile(&42); |
| } |
| } |