From 8bde2acfc7876148ebfe192780434dbb969eded3 Mon Sep 17 00:00:00 2001 From: Alex Crichton Date: Tue, 16 Jan 2018 15:02:31 -0800 Subject: rustc: Add `-C lto=val` option This commit primarily adds the ability to control what kind of LTO happens when rustc performs LTO, namely allowing values to be specified to the `-C lto` option, such as `-C lto=thin` and `-C lto=fat`. (where "fat" is the previous kind of LTO, throw everything in one giant module) Along the way this also refactors a number of fields which store information about whether LTO/ThinLTO are enabled to unify them all into one field through which everything is dispatched, hopefully removing a number of special cases throughout. This is intended to help mitigate #47409 but will require a backport as well, and this would unfortunately need to be an otherwise insta-stable option. --- src/test/run-pass/thinlto/all-crates.rs | 17 +++++++++++++++++ src/test/run-pass/thinlto/thin-lto-inlines2.rs | 2 +- 2 files changed, 18 insertions(+), 1 deletion(-) create mode 100644 src/test/run-pass/thinlto/all-crates.rs (limited to 'src/test/run-pass/thinlto') diff --git a/src/test/run-pass/thinlto/all-crates.rs b/src/test/run-pass/thinlto/all-crates.rs new file mode 100644 index 00000000000..772a9ec8293 --- /dev/null +++ b/src/test/run-pass/thinlto/all-crates.rs @@ -0,0 +1,17 @@ +// 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 or the MIT license +// , at your +// option. This file may not be copied, modified, or distributed +// except according to those terms. + +// compile-flags: -Clto=thin +// no-prefer-dynamic +// min-llvm-version 4.0 + +fn main() { + println!("hello!"); +} diff --git a/src/test/run-pass/thinlto/thin-lto-inlines2.rs b/src/test/run-pass/thinlto/thin-lto-inlines2.rs index 0e8ad08a5f6..6020f72415d 100644 --- a/src/test/run-pass/thinlto/thin-lto-inlines2.rs +++ b/src/test/run-pass/thinlto/thin-lto-inlines2.rs @@ -8,7 +8,7 @@ // option. This file may not be copied, modified, or distributed // except according to those terms. -// compile-flags: -Z thinlto -C codegen-units=8 -O -C lto +// compile-flags: -C codegen-units=8 -O -C lto=thin // aux-build:thin-lto-inlines-aux.rs // min-llvm-version 4.0 // no-prefer-dynamic -- cgit 1.4.1-3-g733a5