// 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 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. // compile-flags: -Z thinlto -C codegen-units=8 -O // ignore-emscripten can't inspect instructions on emscripten // We want to assert here that ThinLTO will inline across codegen units. There's // not really a great way to do that in general so we sort of hack around it by // praying two functions go into separate codegen units and then assuming that // if inlining *doesn't* happen the first byte of the functions will differ. pub fn foo() -> u32 { bar::bar() } mod bar { pub fn bar() -> u32 { 3 } } fn main() { println!("{} {}", foo(), bar::bar()); unsafe { let foo = foo as usize as *const u8; let bar = bar::bar as usize as *const u8; assert_eq!(*foo, *bar); } }