Generate code for const- and inline-fns if -Clink-dead-code is specified.
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4 changed files with 38 additions and 3 deletions
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@ -115,7 +115,7 @@ pub trait MonoItemExt<'a, 'tcx>: fmt::Debug {
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let inline_in_all_cgus =
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tcx.sess.opts.debugging_opts.inline_in_all_cgus.unwrap_or_else(|| {
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tcx.sess.opts.optimize != OptLevel::No
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});
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}) && !tcx.sess.opts.cg.link_dead_code;
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match *self.as_mono_item() {
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MonoItem::Fn(ref instance) => {
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@ -236,7 +236,9 @@ pub fn partition<'a, 'tcx, I>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
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// Next we try to make as many symbols "internal" as possible, so LLVM has
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// more freedom to optimize.
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if !tcx.sess.opts.cg.link_dead_code {
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internalize_symbols(tcx, &mut post_inlining, inlining_map);
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}
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// Finally, sort by codegen unit name, so that we get deterministic results
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let PostInliningPartitioning {
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@ -1014,7 +1014,13 @@ fn collect_and_partition_translation_items<'a, 'tcx>(
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MonoItemCollectionMode::Lazy
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}
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}
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None => MonoItemCollectionMode::Lazy
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None => {
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if tcx.sess.opts.cg.link_dead_code {
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MonoItemCollectionMode::Eager
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} else {
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MonoItemCollectionMode::Lazy
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}
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}
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};
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let (items, inlining_map) =
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27
src/test/codegen/link-dead-code.rs
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27
src/test/codegen/link-dead-code.rs
Normal file
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@ -0,0 +1,27 @@
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// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// compile-flags:-Clink-dead-code
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#![feature(const_fn)]
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#![crate_type = "rlib"]
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// This test makes sure that, when -Clink-dead-code is specified, we generate
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// code for functions that would otherwise be skipped.
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// CHECK-LABEL: define hidden i32 @_ZN14link_dead_code8const_fn
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const fn const_fn() -> i32 { 1 }
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// CHECK-LABEL: define hidden i32 @_ZN14link_dead_code9inline_fn
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#[inline]
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fn inline_fn() -> i32 { 2 }
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// CHECK-LABEL: define hidden i32 @_ZN14link_dead_code10private_fn
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fn private_fn() -> i32 { 3 }
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